1/*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD$"); 35 36#include <netinet/sctp_os.h> 37#include <sys/proc.h> 38#include <netinet/sctp_var.h> 39#include <netinet/sctp_sysctl.h> 40#include <netinet/sctp_header.h> 41#include <netinet/sctp_pcb.h> 42#include <netinet/sctputil.h> 43#include <netinet/sctp_output.h> 44#include <netinet/sctp_uio.h> 45#include <netinet/sctputil.h> 46#include <netinet/sctp_auth.h> 47#include <netinet/sctp_timer.h> 48#include <netinet/sctp_asconf.h> 49#include <netinet/sctp_indata.h> 50#include <netinet/sctp_bsd_addr.h> 51#include <netinet/sctp_input.h> 52#include <netinet/sctp_crc32.h> 53#if defined(INET) || defined(INET6) 54#include <netinet/udp.h> 55#endif 56#include <netinet/udp_var.h> 57#include <machine/in_cksum.h> 58 59 60 61#define SCTP_MAX_GAPS_INARRAY 4 62struct sack_track { 63 uint8_t right_edge; /* mergable on the right edge */ 64 uint8_t left_edge; /* mergable on the left edge */ 65 uint8_t num_entries; 66 uint8_t spare; 67 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY]; 68}; 69 70struct sack_track sack_array[256] = { 71 {0, 0, 0, 0, /* 0x00 */ 72 {{0, 0}, 73 {0, 0}, 74 {0, 0}, 75 {0, 0} 76 } 77 }, 78 {1, 0, 1, 0, /* 0x01 */ 79 {{0, 0}, 80 {0, 0}, 81 {0, 0}, 82 {0, 0} 83 } 84 }, 85 {0, 0, 1, 0, /* 0x02 */ 86 {{1, 1}, 87 {0, 0}, 88 {0, 0}, 89 {0, 0} 90 } 91 }, 92 {1, 0, 1, 0, /* 0x03 */ 93 {{0, 1}, 94 {0, 0}, 95 {0, 0}, 96 {0, 0} 97 } 98 }, 99 {0, 0, 1, 0, /* 0x04 */ 100 {{2, 2}, 101 {0, 0}, 102 {0, 0}, 103 {0, 0} 104 } 105 }, 106 {1, 0, 2, 0, /* 0x05 */ 107 {{0, 0}, 108 {2, 2}, 109 {0, 0}, 110 {0, 0} 111 } 112 }, 113 {0, 0, 1, 0, /* 0x06 */ 114 {{1, 2}, 115 {0, 0}, 116 {0, 0}, 117 {0, 0} 118 } 119 }, 120 {1, 0, 1, 0, /* 0x07 */ 121 {{0, 2}, 122 {0, 0}, 123 {0, 0}, 124 {0, 0} 125 } 126 }, 127 {0, 0, 1, 0, /* 0x08 */ 128 {{3, 3}, 129 {0, 0}, 130 {0, 0}, 131 {0, 0} 132 } 133 }, 134 {1, 0, 2, 0, /* 0x09 */ 135 {{0, 0}, 136 {3, 3}, 137 {0, 0}, 138 {0, 0} 139 } 140 }, 141 {0, 0, 2, 0, /* 0x0a */ 142 {{1, 1}, 143 {3, 3}, 144 {0, 0}, 145 {0, 0} 146 } 147 }, 148 {1, 0, 2, 0, /* 0x0b */ 149 {{0, 1}, 150 {3, 3}, 151 {0, 0}, 152 {0, 0} 153 } 154 }, 155 {0, 0, 1, 0, /* 0x0c */ 156 {{2, 3}, 157 {0, 0}, 158 {0, 0}, 159 {0, 0} 160 } 161 }, 162 {1, 0, 2, 0, /* 0x0d */ 163 {{0, 0}, 164 {2, 3}, 165 {0, 0}, 166 {0, 0} 167 } 168 }, 169 {0, 0, 1, 0, /* 0x0e */ 170 {{1, 3}, 171 {0, 0}, 172 {0, 0}, 173 {0, 0} 174 } 175 }, 176 {1, 0, 1, 0, /* 0x0f */ 177 {{0, 3}, 178 {0, 0}, 179 {0, 0}, 180 {0, 0} 181 } 182 }, 183 {0, 0, 1, 0, /* 0x10 */ 184 {{4, 4}, 185 {0, 0}, 186 {0, 0}, 187 {0, 0} 188 } 189 }, 190 {1, 0, 2, 0, /* 0x11 */ 191 {{0, 0}, 192 {4, 4}, 193 {0, 0}, 194 {0, 0} 195 } 196 }, 197 {0, 0, 2, 0, /* 0x12 */ 198 {{1, 1}, 199 {4, 4}, 200 {0, 0}, 201 {0, 0} 202 } 203 }, 204 {1, 0, 2, 0, /* 0x13 */ 205 {{0, 1}, 206 {4, 4}, 207 {0, 0}, 208 {0, 0} 209 } 210 }, 211 {0, 0, 2, 0, /* 0x14 */ 212 {{2, 2}, 213 {4, 4}, 214 {0, 0}, 215 {0, 0} 216 } 217 }, 218 {1, 0, 3, 0, /* 0x15 */ 219 {{0, 0}, 220 {2, 2}, 221 {4, 4}, 222 {0, 0} 223 } 224 }, 225 {0, 0, 2, 0, /* 0x16 */ 226 {{1, 2}, 227 {4, 4}, 228 {0, 0}, 229 {0, 0} 230 } 231 }, 232 {1, 0, 2, 0, /* 0x17 */ 233 {{0, 2}, 234 {4, 4}, 235 {0, 0}, 236 {0, 0} 237 } 238 }, 239 {0, 0, 1, 0, /* 0x18 */ 240 {{3, 4}, 241 {0, 0}, 242 {0, 0}, 243 {0, 0} 244 } 245 }, 246 {1, 0, 2, 0, /* 0x19 */ 247 {{0, 0}, 248 {3, 4}, 249 {0, 0}, 250 {0, 0} 251 } 252 }, 253 {0, 0, 2, 0, /* 0x1a */ 254 {{1, 1}, 255 {3, 4}, 256 {0, 0}, 257 {0, 0} 258 } 259 }, 260 {1, 0, 2, 0, /* 0x1b */ 261 {{0, 1}, 262 {3, 4}, 263 {0, 0}, 264 {0, 0} 265 } 266 }, 267 {0, 0, 1, 0, /* 0x1c */ 268 {{2, 4}, 269 {0, 0}, 270 {0, 0}, 271 {0, 0} 272 } 273 }, 274 {1, 0, 2, 0, /* 0x1d */ 275 {{0, 0}, 276 {2, 4}, 277 {0, 0}, 278 {0, 0} 279 } 280 }, 281 {0, 0, 1, 0, /* 0x1e */ 282 {{1, 4}, 283 {0, 0}, 284 {0, 0}, 285 {0, 0} 286 } 287 }, 288 {1, 0, 1, 0, /* 0x1f */ 289 {{0, 4}, 290 {0, 0}, 291 {0, 0}, 292 {0, 0} 293 } 294 }, 295 {0, 0, 1, 0, /* 0x20 */ 296 {{5, 5}, 297 {0, 0}, 298 {0, 0}, 299 {0, 0} 300 } 301 }, 302 {1, 0, 2, 0, /* 0x21 */ 303 {{0, 0}, 304 {5, 5}, 305 {0, 0}, 306 {0, 0} 307 } 308 }, 309 {0, 0, 2, 0, /* 0x22 */ 310 {{1, 1}, 311 {5, 5}, 312 {0, 0}, 313 {0, 0} 314 } 315 }, 316 {1, 0, 2, 0, /* 0x23 */ 317 {{0, 1}, 318 {5, 5}, 319 {0, 0}, 320 {0, 0} 321 } 322 }, 323 {0, 0, 2, 0, /* 0x24 */ 324 {{2, 2}, 325 {5, 5}, 326 {0, 0}, 327 {0, 0} 328 } 329 }, 330 {1, 0, 3, 0, /* 0x25 */ 331 {{0, 0}, 332 {2, 2}, 333 {5, 5}, 334 {0, 0} 335 } 336 }, 337 {0, 0, 2, 0, /* 0x26 */ 338 {{1, 2}, 339 {5, 5}, 340 {0, 0}, 341 {0, 0} 342 } 343 }, 344 {1, 0, 2, 0, /* 0x27 */ 345 {{0, 2}, 346 {5, 5}, 347 {0, 0}, 348 {0, 0} 349 } 350 }, 351 {0, 0, 2, 0, /* 0x28 */ 352 {{3, 3}, 353 {5, 5}, 354 {0, 0}, 355 {0, 0} 356 } 357 }, 358 {1, 0, 3, 0, /* 0x29 */ 359 {{0, 0}, 360 {3, 3}, 361 {5, 5}, 362 {0, 0} 363 } 364 }, 365 {0, 0, 3, 0, /* 0x2a */ 366 {{1, 1}, 367 {3, 3}, 368 {5, 5}, 369 {0, 0} 370 } 371 }, 372 {1, 0, 3, 0, /* 0x2b */ 373 {{0, 1}, 374 {3, 3}, 375 {5, 5}, 376 {0, 0} 377 } 378 }, 379 {0, 0, 2, 0, /* 0x2c */ 380 {{2, 3}, 381 {5, 5}, 382 {0, 0}, 383 {0, 0} 384 } 385 }, 386 {1, 0, 3, 0, /* 0x2d */ 387 {{0, 0}, 388 {2, 3}, 389 {5, 5}, 390 {0, 0} 391 } 392 }, 393 {0, 0, 2, 0, /* 0x2e */ 394 {{1, 3}, 395 {5, 5}, 396 {0, 0}, 397 {0, 0} 398 } 399 }, 400 {1, 0, 2, 0, /* 0x2f */ 401 {{0, 3}, 402 {5, 5}, 403 {0, 0}, 404 {0, 0} 405 } 406 }, 407 {0, 0, 1, 0, /* 0x30 */ 408 {{4, 5}, 409 {0, 0}, 410 {0, 0}, 411 {0, 0} 412 } 413 }, 414 {1, 0, 2, 0, /* 0x31 */ 415 {{0, 0}, 416 {4, 5}, 417 {0, 0}, 418 {0, 0} 419 } 420 }, 421 {0, 0, 2, 0, /* 0x32 */ 422 {{1, 1}, 423 {4, 5}, 424 {0, 0}, 425 {0, 0} 426 } 427 }, 428 {1, 0, 2, 0, /* 0x33 */ 429 {{0, 1}, 430 {4, 5}, 431 {0, 0}, 432 {0, 0} 433 } 434 }, 435 {0, 0, 2, 0, /* 0x34 */ 436 {{2, 2}, 437 {4, 5}, 438 {0, 0}, 439 {0, 0} 440 } 441 }, 442 {1, 0, 3, 0, /* 0x35 */ 443 {{0, 0}, 444 {2, 2}, 445 {4, 5}, 446 {0, 0} 447 } 448 }, 449 {0, 0, 2, 0, /* 0x36 */ 450 {{1, 2}, 451 {4, 5}, 452 {0, 0}, 453 {0, 0} 454 } 455 }, 456 {1, 0, 2, 0, /* 0x37 */ 457 {{0, 2}, 458 {4, 5}, 459 {0, 0}, 460 {0, 0} 461 } 462 }, 463 {0, 0, 1, 0, /* 0x38 */ 464 {{3, 5}, 465 {0, 0}, 466 {0, 0}, 467 {0, 0} 468 } 469 }, 470 {1, 0, 2, 0, /* 0x39 */ 471 {{0, 0}, 472 {3, 5}, 473 {0, 0}, 474 {0, 0} 475 } 476 }, 477 {0, 0, 2, 0, /* 0x3a */ 478 {{1, 1}, 479 {3, 5}, 480 {0, 0}, 481 {0, 0} 482 } 483 }, 484 {1, 0, 2, 0, /* 0x3b */ 485 {{0, 1}, 486 {3, 5}, 487 {0, 0}, 488 {0, 0} 489 } 490 }, 491 {0, 0, 1, 0, /* 0x3c */ 492 {{2, 5}, 493 {0, 0}, 494 {0, 0}, 495 {0, 0} 496 } 497 }, 498 {1, 0, 2, 0, /* 0x3d */ 499 {{0, 0}, 500 {2, 5}, 501 {0, 0}, 502 {0, 0} 503 } 504 }, 505 {0, 0, 1, 0, /* 0x3e */ 506 {{1, 5}, 507 {0, 0}, 508 {0, 0}, 509 {0, 0} 510 } 511 }, 512 {1, 0, 1, 0, /* 0x3f */ 513 {{0, 5}, 514 {0, 0}, 515 {0, 0}, 516 {0, 0} 517 } 518 }, 519 {0, 0, 1, 0, /* 0x40 */ 520 {{6, 6}, 521 {0, 0}, 522 {0, 0}, 523 {0, 0} 524 } 525 }, 526 {1, 0, 2, 0, /* 0x41 */ 527 {{0, 0}, 528 {6, 6}, 529 {0, 0}, 530 {0, 0} 531 } 532 }, 533 {0, 0, 2, 0, /* 0x42 */ 534 {{1, 1}, 535 {6, 6}, 536 {0, 0}, 537 {0, 0} 538 } 539 }, 540 {1, 0, 2, 0, /* 0x43 */ 541 {{0, 1}, 542 {6, 6}, 543 {0, 0}, 544 {0, 0} 545 } 546 }, 547 {0, 0, 2, 0, /* 0x44 */ 548 {{2, 2}, 549 {6, 6}, 550 {0, 0}, 551 {0, 0} 552 } 553 }, 554 {1, 0, 3, 0, /* 0x45 */ 555 {{0, 0}, 556 {2, 2}, 557 {6, 6}, 558 {0, 0} 559 } 560 }, 561 {0, 0, 2, 0, /* 0x46 */ 562 {{1, 2}, 563 {6, 6}, 564 {0, 0}, 565 {0, 0} 566 } 567 }, 568 {1, 0, 2, 0, /* 0x47 */ 569 {{0, 2}, 570 {6, 6}, 571 {0, 0}, 572 {0, 0} 573 } 574 }, 575 {0, 0, 2, 0, /* 0x48 */ 576 {{3, 3}, 577 {6, 6}, 578 {0, 0}, 579 {0, 0} 580 } 581 }, 582 {1, 0, 3, 0, /* 0x49 */ 583 {{0, 0}, 584 {3, 3}, 585 {6, 6}, 586 {0, 0} 587 } 588 }, 589 {0, 0, 3, 0, /* 0x4a */ 590 {{1, 1}, 591 {3, 3}, 592 {6, 6}, 593 {0, 0} 594 } 595 }, 596 {1, 0, 3, 0, /* 0x4b */ 597 {{0, 1}, 598 {3, 3}, 599 {6, 6}, 600 {0, 0} 601 } 602 }, 603 {0, 0, 2, 0, /* 0x4c */ 604 {{2, 3}, 605 {6, 6}, 606 {0, 0}, 607 {0, 0} 608 } 609 }, 610 {1, 0, 3, 0, /* 0x4d */ 611 {{0, 0}, 612 {2, 3}, 613 {6, 6}, 614 {0, 0} 615 } 616 }, 617 {0, 0, 2, 0, /* 0x4e */ 618 {{1, 3}, 619 {6, 6}, 620 {0, 0}, 621 {0, 0} 622 } 623 }, 624 {1, 0, 2, 0, /* 0x4f */ 625 {{0, 3}, 626 {6, 6}, 627 {0, 0}, 628 {0, 0} 629 } 630 }, 631 {0, 0, 2, 0, /* 0x50 */ 632 {{4, 4}, 633 {6, 6}, 634 {0, 0}, 635 {0, 0} 636 } 637 }, 638 {1, 0, 3, 0, /* 0x51 */ 639 {{0, 0}, 640 {4, 4}, 641 {6, 6}, 642 {0, 0} 643 } 644 }, 645 {0, 0, 3, 0, /* 0x52 */ 646 {{1, 1}, 647 {4, 4}, 648 {6, 6}, 649 {0, 0} 650 } 651 }, 652 {1, 0, 3, 0, /* 0x53 */ 653 {{0, 1}, 654 {4, 4}, 655 {6, 6}, 656 {0, 0} 657 } 658 }, 659 {0, 0, 3, 0, /* 0x54 */ 660 {{2, 2}, 661 {4, 4}, 662 {6, 6}, 663 {0, 0} 664 } 665 }, 666 {1, 0, 4, 0, /* 0x55 */ 667 {{0, 0}, 668 {2, 2}, 669 {4, 4}, 670 {6, 6} 671 } 672 }, 673 {0, 0, 3, 0, /* 0x56 */ 674 {{1, 2}, 675 {4, 4}, 676 {6, 6}, 677 {0, 0} 678 } 679 }, 680 {1, 0, 3, 0, /* 0x57 */ 681 {{0, 2}, 682 {4, 4}, 683 {6, 6}, 684 {0, 0} 685 } 686 }, 687 {0, 0, 2, 0, /* 0x58 */ 688 {{3, 4}, 689 {6, 6}, 690 {0, 0}, 691 {0, 0} 692 } 693 }, 694 {1, 0, 3, 0, /* 0x59 */ 695 {{0, 0}, 696 {3, 4}, 697 {6, 6}, 698 {0, 0} 699 } 700 }, 701 {0, 0, 3, 0, /* 0x5a */ 702 {{1, 1}, 703 {3, 4}, 704 {6, 6}, 705 {0, 0} 706 } 707 }, 708 {1, 0, 3, 0, /* 0x5b */ 709 {{0, 1}, 710 {3, 4}, 711 {6, 6}, 712 {0, 0} 713 } 714 }, 715 {0, 0, 2, 0, /* 0x5c */ 716 {{2, 4}, 717 {6, 6}, 718 {0, 0}, 719 {0, 0} 720 } 721 }, 722 {1, 0, 3, 0, /* 0x5d */ 723 {{0, 0}, 724 {2, 4}, 725 {6, 6}, 726 {0, 0} 727 } 728 }, 729 {0, 0, 2, 0, /* 0x5e */ 730 {{1, 4}, 731 {6, 6}, 732 {0, 0}, 733 {0, 0} 734 } 735 }, 736 {1, 0, 2, 0, /* 0x5f */ 737 {{0, 4}, 738 {6, 6}, 739 {0, 0}, 740 {0, 0} 741 } 742 }, 743 {0, 0, 1, 0, /* 0x60 */ 744 {{5, 6}, 745 {0, 0}, 746 {0, 0}, 747 {0, 0} 748 } 749 }, 750 {1, 0, 2, 0, /* 0x61 */ 751 {{0, 0}, 752 {5, 6}, 753 {0, 0}, 754 {0, 0} 755 } 756 }, 757 {0, 0, 2, 0, /* 0x62 */ 758 {{1, 1}, 759 {5, 6}, 760 {0, 0}, 761 {0, 0} 762 } 763 }, 764 {1, 0, 2, 0, /* 0x63 */ 765 {{0, 1}, 766 {5, 6}, 767 {0, 0}, 768 {0, 0} 769 } 770 }, 771 {0, 0, 2, 0, /* 0x64 */ 772 {{2, 2}, 773 {5, 6}, 774 {0, 0}, 775 {0, 0} 776 } 777 }, 778 {1, 0, 3, 0, /* 0x65 */ 779 {{0, 0}, 780 {2, 2}, 781 {5, 6}, 782 {0, 0} 783 } 784 }, 785 {0, 0, 2, 0, /* 0x66 */ 786 {{1, 2}, 787 {5, 6}, 788 {0, 0}, 789 {0, 0} 790 } 791 }, 792 {1, 0, 2, 0, /* 0x67 */ 793 {{0, 2}, 794 {5, 6}, 795 {0, 0}, 796 {0, 0} 797 } 798 }, 799 {0, 0, 2, 0, /* 0x68 */ 800 {{3, 3}, 801 {5, 6}, 802 {0, 0}, 803 {0, 0} 804 } 805 }, 806 {1, 0, 3, 0, /* 0x69 */ 807 {{0, 0}, 808 {3, 3}, 809 {5, 6}, 810 {0, 0} 811 } 812 }, 813 {0, 0, 3, 0, /* 0x6a */ 814 {{1, 1}, 815 {3, 3}, 816 {5, 6}, 817 {0, 0} 818 } 819 }, 820 {1, 0, 3, 0, /* 0x6b */ 821 {{0, 1}, 822 {3, 3}, 823 {5, 6}, 824 {0, 0} 825 } 826 }, 827 {0, 0, 2, 0, /* 0x6c */ 828 {{2, 3}, 829 {5, 6}, 830 {0, 0}, 831 {0, 0} 832 } 833 }, 834 {1, 0, 3, 0, /* 0x6d */ 835 {{0, 0}, 836 {2, 3}, 837 {5, 6}, 838 {0, 0} 839 } 840 }, 841 {0, 0, 2, 0, /* 0x6e */ 842 {{1, 3}, 843 {5, 6}, 844 {0, 0}, 845 {0, 0} 846 } 847 }, 848 {1, 0, 2, 0, /* 0x6f */ 849 {{0, 3}, 850 {5, 6}, 851 {0, 0}, 852 {0, 0} 853 } 854 }, 855 {0, 0, 1, 0, /* 0x70 */ 856 {{4, 6}, 857 {0, 0}, 858 {0, 0}, 859 {0, 0} 860 } 861 }, 862 {1, 0, 2, 0, /* 0x71 */ 863 {{0, 0}, 864 {4, 6}, 865 {0, 0}, 866 {0, 0} 867 } 868 }, 869 {0, 0, 2, 0, /* 0x72 */ 870 {{1, 1}, 871 {4, 6}, 872 {0, 0}, 873 {0, 0} 874 } 875 }, 876 {1, 0, 2, 0, /* 0x73 */ 877 {{0, 1}, 878 {4, 6}, 879 {0, 0}, 880 {0, 0} 881 } 882 }, 883 {0, 0, 2, 0, /* 0x74 */ 884 {{2, 2}, 885 {4, 6}, 886 {0, 0}, 887 {0, 0} 888 } 889 }, 890 {1, 0, 3, 0, /* 0x75 */ 891 {{0, 0}, 892 {2, 2}, 893 {4, 6}, 894 {0, 0} 895 } 896 }, 897 {0, 0, 2, 0, /* 0x76 */ 898 {{1, 2}, 899 {4, 6}, 900 {0, 0}, 901 {0, 0} 902 } 903 }, 904 {1, 0, 2, 0, /* 0x77 */ 905 {{0, 2}, 906 {4, 6}, 907 {0, 0}, 908 {0, 0} 909 } 910 }, 911 {0, 0, 1, 0, /* 0x78 */ 912 {{3, 6}, 913 {0, 0}, 914 {0, 0}, 915 {0, 0} 916 } 917 }, 918 {1, 0, 2, 0, /* 0x79 */ 919 {{0, 0}, 920 {3, 6}, 921 {0, 0}, 922 {0, 0} 923 } 924 }, 925 {0, 0, 2, 0, /* 0x7a */ 926 {{1, 1}, 927 {3, 6}, 928 {0, 0}, 929 {0, 0} 930 } 931 }, 932 {1, 0, 2, 0, /* 0x7b */ 933 {{0, 1}, 934 {3, 6}, 935 {0, 0}, 936 {0, 0} 937 } 938 }, 939 {0, 0, 1, 0, /* 0x7c */ 940 {{2, 6}, 941 {0, 0}, 942 {0, 0}, 943 {0, 0} 944 } 945 }, 946 {1, 0, 2, 0, /* 0x7d */ 947 {{0, 0}, 948 {2, 6}, 949 {0, 0}, 950 {0, 0} 951 } 952 }, 953 {0, 0, 1, 0, /* 0x7e */ 954 {{1, 6}, 955 {0, 0}, 956 {0, 0}, 957 {0, 0} 958 } 959 }, 960 {1, 0, 1, 0, /* 0x7f */ 961 {{0, 6}, 962 {0, 0}, 963 {0, 0}, 964 {0, 0} 965 } 966 }, 967 {0, 1, 1, 0, /* 0x80 */ 968 {{7, 7}, 969 {0, 0}, 970 {0, 0}, 971 {0, 0} 972 } 973 }, 974 {1, 1, 2, 0, /* 0x81 */ 975 {{0, 0}, 976 {7, 7}, 977 {0, 0}, 978 {0, 0} 979 } 980 }, 981 {0, 1, 2, 0, /* 0x82 */ 982 {{1, 1}, 983 {7, 7}, 984 {0, 0}, 985 {0, 0} 986 } 987 }, 988 {1, 1, 2, 0, /* 0x83 */ 989 {{0, 1}, 990 {7, 7}, 991 {0, 0}, 992 {0, 0} 993 } 994 }, 995 {0, 1, 2, 0, /* 0x84 */ 996 {{2, 2}, 997 {7, 7}, 998 {0, 0}, 999 {0, 0} 1000 } 1001 }, 1002 {1, 1, 3, 0, /* 0x85 */ 1003 {{0, 0}, 1004 {2, 2}, 1005 {7, 7}, 1006 {0, 0} 1007 } 1008 }, 1009 {0, 1, 2, 0, /* 0x86 */ 1010 {{1, 2}, 1011 {7, 7}, 1012 {0, 0}, 1013 {0, 0} 1014 } 1015 }, 1016 {1, 1, 2, 0, /* 0x87 */ 1017 {{0, 2}, 1018 {7, 7}, 1019 {0, 0}, 1020 {0, 0} 1021 } 1022 }, 1023 {0, 1, 2, 0, /* 0x88 */ 1024 {{3, 3}, 1025 {7, 7}, 1026 {0, 0}, 1027 {0, 0} 1028 } 1029 }, 1030 {1, 1, 3, 0, /* 0x89 */ 1031 {{0, 0}, 1032 {3, 3}, 1033 {7, 7}, 1034 {0, 0} 1035 } 1036 }, 1037 {0, 1, 3, 0, /* 0x8a */ 1038 {{1, 1}, 1039 {3, 3}, 1040 {7, 7}, 1041 {0, 0} 1042 } 1043 }, 1044 {1, 1, 3, 0, /* 0x8b */ 1045 {{0, 1}, 1046 {3, 3}, 1047 {7, 7}, 1048 {0, 0} 1049 } 1050 }, 1051 {0, 1, 2, 0, /* 0x8c */ 1052 {{2, 3}, 1053 {7, 7}, 1054 {0, 0}, 1055 {0, 0} 1056 } 1057 }, 1058 {1, 1, 3, 0, /* 0x8d */ 1059 {{0, 0}, 1060 {2, 3}, 1061 {7, 7}, 1062 {0, 0} 1063 } 1064 }, 1065 {0, 1, 2, 0, /* 0x8e */ 1066 {{1, 3}, 1067 {7, 7}, 1068 {0, 0}, 1069 {0, 0} 1070 } 1071 }, 1072 {1, 1, 2, 0, /* 0x8f */ 1073 {{0, 3}, 1074 {7, 7}, 1075 {0, 0}, 1076 {0, 0} 1077 } 1078 }, 1079 {0, 1, 2, 0, /* 0x90 */ 1080 {{4, 4}, 1081 {7, 7}, 1082 {0, 0}, 1083 {0, 0} 1084 } 1085 }, 1086 {1, 1, 3, 0, /* 0x91 */ 1087 {{0, 0}, 1088 {4, 4}, 1089 {7, 7}, 1090 {0, 0} 1091 } 1092 }, 1093 {0, 1, 3, 0, /* 0x92 */ 1094 {{1, 1}, 1095 {4, 4}, 1096 {7, 7}, 1097 {0, 0} 1098 } 1099 }, 1100 {1, 1, 3, 0, /* 0x93 */ 1101 {{0, 1}, 1102 {4, 4}, 1103 {7, 7}, 1104 {0, 0} 1105 } 1106 }, 1107 {0, 1, 3, 0, /* 0x94 */ 1108 {{2, 2}, 1109 {4, 4}, 1110 {7, 7}, 1111 {0, 0} 1112 } 1113 }, 1114 {1, 1, 4, 0, /* 0x95 */ 1115 {{0, 0}, 1116 {2, 2}, 1117 {4, 4}, 1118 {7, 7} 1119 } 1120 }, 1121 {0, 1, 3, 0, /* 0x96 */ 1122 {{1, 2}, 1123 {4, 4}, 1124 {7, 7}, 1125 {0, 0} 1126 } 1127 }, 1128 {1, 1, 3, 0, /* 0x97 */ 1129 {{0, 2}, 1130 {4, 4}, 1131 {7, 7}, 1132 {0, 0} 1133 } 1134 }, 1135 {0, 1, 2, 0, /* 0x98 */ 1136 {{3, 4}, 1137 {7, 7}, 1138 {0, 0}, 1139 {0, 0} 1140 } 1141 }, 1142 {1, 1, 3, 0, /* 0x99 */ 1143 {{0, 0}, 1144 {3, 4}, 1145 {7, 7}, 1146 {0, 0} 1147 } 1148 }, 1149 {0, 1, 3, 0, /* 0x9a */ 1150 {{1, 1}, 1151 {3, 4}, 1152 {7, 7}, 1153 {0, 0} 1154 } 1155 }, 1156 {1, 1, 3, 0, /* 0x9b */ 1157 {{0, 1}, 1158 {3, 4}, 1159 {7, 7}, 1160 {0, 0} 1161 } 1162 }, 1163 {0, 1, 2, 0, /* 0x9c */ 1164 {{2, 4}, 1165 {7, 7}, 1166 {0, 0}, 1167 {0, 0} 1168 } 1169 }, 1170 {1, 1, 3, 0, /* 0x9d */ 1171 {{0, 0}, 1172 {2, 4}, 1173 {7, 7}, 1174 {0, 0} 1175 } 1176 }, 1177 {0, 1, 2, 0, /* 0x9e */ 1178 {{1, 4}, 1179 {7, 7}, 1180 {0, 0}, 1181 {0, 0} 1182 } 1183 }, 1184 {1, 1, 2, 0, /* 0x9f */ 1185 {{0, 4}, 1186 {7, 7}, 1187 {0, 0}, 1188 {0, 0} 1189 } 1190 }, 1191 {0, 1, 2, 0, /* 0xa0 */ 1192 {{5, 5}, 1193 {7, 7}, 1194 {0, 0}, 1195 {0, 0} 1196 } 1197 }, 1198 {1, 1, 3, 0, /* 0xa1 */ 1199 {{0, 0}, 1200 {5, 5}, 1201 {7, 7}, 1202 {0, 0} 1203 } 1204 }, 1205 {0, 1, 3, 0, /* 0xa2 */ 1206 {{1, 1}, 1207 {5, 5}, 1208 {7, 7}, 1209 {0, 0} 1210 } 1211 }, 1212 {1, 1, 3, 0, /* 0xa3 */ 1213 {{0, 1}, 1214 {5, 5}, 1215 {7, 7}, 1216 {0, 0} 1217 } 1218 }, 1219 {0, 1, 3, 0, /* 0xa4 */ 1220 {{2, 2}, 1221 {5, 5}, 1222 {7, 7}, 1223 {0, 0} 1224 } 1225 }, 1226 {1, 1, 4, 0, /* 0xa5 */ 1227 {{0, 0}, 1228 {2, 2}, 1229 {5, 5}, 1230 {7, 7} 1231 } 1232 }, 1233 {0, 1, 3, 0, /* 0xa6 */ 1234 {{1, 2}, 1235 {5, 5}, 1236 {7, 7}, 1237 {0, 0} 1238 } 1239 }, 1240 {1, 1, 3, 0, /* 0xa7 */ 1241 {{0, 2}, 1242 {5, 5}, 1243 {7, 7}, 1244 {0, 0} 1245 } 1246 }, 1247 {0, 1, 3, 0, /* 0xa8 */ 1248 {{3, 3}, 1249 {5, 5}, 1250 {7, 7}, 1251 {0, 0} 1252 } 1253 }, 1254 {1, 1, 4, 0, /* 0xa9 */ 1255 {{0, 0}, 1256 {3, 3}, 1257 {5, 5}, 1258 {7, 7} 1259 } 1260 }, 1261 {0, 1, 4, 0, /* 0xaa */ 1262 {{1, 1}, 1263 {3, 3}, 1264 {5, 5}, 1265 {7, 7} 1266 } 1267 }, 1268 {1, 1, 4, 0, /* 0xab */ 1269 {{0, 1}, 1270 {3, 3}, 1271 {5, 5}, 1272 {7, 7} 1273 } 1274 }, 1275 {0, 1, 3, 0, /* 0xac */ 1276 {{2, 3}, 1277 {5, 5}, 1278 {7, 7}, 1279 {0, 0} 1280 } 1281 }, 1282 {1, 1, 4, 0, /* 0xad */ 1283 {{0, 0}, 1284 {2, 3}, 1285 {5, 5}, 1286 {7, 7} 1287 } 1288 }, 1289 {0, 1, 3, 0, /* 0xae */ 1290 {{1, 3}, 1291 {5, 5}, 1292 {7, 7}, 1293 {0, 0} 1294 } 1295 }, 1296 {1, 1, 3, 0, /* 0xaf */ 1297 {{0, 3}, 1298 {5, 5}, 1299 {7, 7}, 1300 {0, 0} 1301 } 1302 }, 1303 {0, 1, 2, 0, /* 0xb0 */ 1304 {{4, 5}, 1305 {7, 7}, 1306 {0, 0}, 1307 {0, 0} 1308 } 1309 }, 1310 {1, 1, 3, 0, /* 0xb1 */ 1311 {{0, 0}, 1312 {4, 5}, 1313 {7, 7}, 1314 {0, 0} 1315 } 1316 }, 1317 {0, 1, 3, 0, /* 0xb2 */ 1318 {{1, 1}, 1319 {4, 5}, 1320 {7, 7}, 1321 {0, 0} 1322 } 1323 }, 1324 {1, 1, 3, 0, /* 0xb3 */ 1325 {{0, 1}, 1326 {4, 5}, 1327 {7, 7}, 1328 {0, 0} 1329 } 1330 }, 1331 {0, 1, 3, 0, /* 0xb4 */ 1332 {{2, 2}, 1333 {4, 5}, 1334 {7, 7}, 1335 {0, 0} 1336 } 1337 }, 1338 {1, 1, 4, 0, /* 0xb5 */ 1339 {{0, 0}, 1340 {2, 2}, 1341 {4, 5}, 1342 {7, 7} 1343 } 1344 }, 1345 {0, 1, 3, 0, /* 0xb6 */ 1346 {{1, 2}, 1347 {4, 5}, 1348 {7, 7}, 1349 {0, 0} 1350 } 1351 }, 1352 {1, 1, 3, 0, /* 0xb7 */ 1353 {{0, 2}, 1354 {4, 5}, 1355 {7, 7}, 1356 {0, 0} 1357 } 1358 }, 1359 {0, 1, 2, 0, /* 0xb8 */ 1360 {{3, 5}, 1361 {7, 7}, 1362 {0, 0}, 1363 {0, 0} 1364 } 1365 }, 1366 {1, 1, 3, 0, /* 0xb9 */ 1367 {{0, 0}, 1368 {3, 5}, 1369 {7, 7}, 1370 {0, 0} 1371 } 1372 }, 1373 {0, 1, 3, 0, /* 0xba */ 1374 {{1, 1}, 1375 {3, 5}, 1376 {7, 7}, 1377 {0, 0} 1378 } 1379 }, 1380 {1, 1, 3, 0, /* 0xbb */ 1381 {{0, 1}, 1382 {3, 5}, 1383 {7, 7}, 1384 {0, 0} 1385 } 1386 }, 1387 {0, 1, 2, 0, /* 0xbc */ 1388 {{2, 5}, 1389 {7, 7}, 1390 {0, 0}, 1391 {0, 0} 1392 } 1393 }, 1394 {1, 1, 3, 0, /* 0xbd */ 1395 {{0, 0}, 1396 {2, 5}, 1397 {7, 7}, 1398 {0, 0} 1399 } 1400 }, 1401 {0, 1, 2, 0, /* 0xbe */ 1402 {{1, 5}, 1403 {7, 7}, 1404 {0, 0}, 1405 {0, 0} 1406 } 1407 }, 1408 {1, 1, 2, 0, /* 0xbf */ 1409 {{0, 5}, 1410 {7, 7}, 1411 {0, 0}, 1412 {0, 0} 1413 } 1414 }, 1415 {0, 1, 1, 0, /* 0xc0 */ 1416 {{6, 7}, 1417 {0, 0}, 1418 {0, 0}, 1419 {0, 0} 1420 } 1421 }, 1422 {1, 1, 2, 0, /* 0xc1 */ 1423 {{0, 0}, 1424 {6, 7}, 1425 {0, 0}, 1426 {0, 0} 1427 } 1428 }, 1429 {0, 1, 2, 0, /* 0xc2 */ 1430 {{1, 1}, 1431 {6, 7}, 1432 {0, 0}, 1433 {0, 0} 1434 } 1435 }, 1436 {1, 1, 2, 0, /* 0xc3 */ 1437 {{0, 1}, 1438 {6, 7}, 1439 {0, 0}, 1440 {0, 0} 1441 } 1442 }, 1443 {0, 1, 2, 0, /* 0xc4 */ 1444 {{2, 2}, 1445 {6, 7}, 1446 {0, 0}, 1447 {0, 0} 1448 } 1449 }, 1450 {1, 1, 3, 0, /* 0xc5 */ 1451 {{0, 0}, 1452 {2, 2}, 1453 {6, 7}, 1454 {0, 0} 1455 } 1456 }, 1457 {0, 1, 2, 0, /* 0xc6 */ 1458 {{1, 2}, 1459 {6, 7}, 1460 {0, 0}, 1461 {0, 0} 1462 } 1463 }, 1464 {1, 1, 2, 0, /* 0xc7 */ 1465 {{0, 2}, 1466 {6, 7}, 1467 {0, 0}, 1468 {0, 0} 1469 } 1470 }, 1471 {0, 1, 2, 0, /* 0xc8 */ 1472 {{3, 3}, 1473 {6, 7}, 1474 {0, 0}, 1475 {0, 0} 1476 } 1477 }, 1478 {1, 1, 3, 0, /* 0xc9 */ 1479 {{0, 0}, 1480 {3, 3}, 1481 {6, 7}, 1482 {0, 0} 1483 } 1484 }, 1485 {0, 1, 3, 0, /* 0xca */ 1486 {{1, 1}, 1487 {3, 3}, 1488 {6, 7}, 1489 {0, 0} 1490 } 1491 }, 1492 {1, 1, 3, 0, /* 0xcb */ 1493 {{0, 1}, 1494 {3, 3}, 1495 {6, 7}, 1496 {0, 0} 1497 } 1498 }, 1499 {0, 1, 2, 0, /* 0xcc */ 1500 {{2, 3}, 1501 {6, 7}, 1502 {0, 0}, 1503 {0, 0} 1504 } 1505 }, 1506 {1, 1, 3, 0, /* 0xcd */ 1507 {{0, 0}, 1508 {2, 3}, 1509 {6, 7}, 1510 {0, 0} 1511 } 1512 }, 1513 {0, 1, 2, 0, /* 0xce */ 1514 {{1, 3}, 1515 {6, 7}, 1516 {0, 0}, 1517 {0, 0} 1518 } 1519 }, 1520 {1, 1, 2, 0, /* 0xcf */ 1521 {{0, 3}, 1522 {6, 7}, 1523 {0, 0}, 1524 {0, 0} 1525 } 1526 }, 1527 {0, 1, 2, 0, /* 0xd0 */ 1528 {{4, 4}, 1529 {6, 7}, 1530 {0, 0}, 1531 {0, 0} 1532 } 1533 }, 1534 {1, 1, 3, 0, /* 0xd1 */ 1535 {{0, 0}, 1536 {4, 4}, 1537 {6, 7}, 1538 {0, 0} 1539 } 1540 }, 1541 {0, 1, 3, 0, /* 0xd2 */ 1542 {{1, 1}, 1543 {4, 4}, 1544 {6, 7}, 1545 {0, 0} 1546 } 1547 }, 1548 {1, 1, 3, 0, /* 0xd3 */ 1549 {{0, 1}, 1550 {4, 4}, 1551 {6, 7}, 1552 {0, 0} 1553 } 1554 }, 1555 {0, 1, 3, 0, /* 0xd4 */ 1556 {{2, 2}, 1557 {4, 4}, 1558 {6, 7}, 1559 {0, 0} 1560 } 1561 }, 1562 {1, 1, 4, 0, /* 0xd5 */ 1563 {{0, 0}, 1564 {2, 2}, 1565 {4, 4}, 1566 {6, 7} 1567 } 1568 }, 1569 {0, 1, 3, 0, /* 0xd6 */ 1570 {{1, 2}, 1571 {4, 4}, 1572 {6, 7}, 1573 {0, 0} 1574 } 1575 }, 1576 {1, 1, 3, 0, /* 0xd7 */ 1577 {{0, 2}, 1578 {4, 4}, 1579 {6, 7}, 1580 {0, 0} 1581 } 1582 }, 1583 {0, 1, 2, 0, /* 0xd8 */ 1584 {{3, 4}, 1585 {6, 7}, 1586 {0, 0}, 1587 {0, 0} 1588 } 1589 }, 1590 {1, 1, 3, 0, /* 0xd9 */ 1591 {{0, 0}, 1592 {3, 4}, 1593 {6, 7}, 1594 {0, 0} 1595 } 1596 }, 1597 {0, 1, 3, 0, /* 0xda */ 1598 {{1, 1}, 1599 {3, 4}, 1600 {6, 7}, 1601 {0, 0} 1602 } 1603 }, 1604 {1, 1, 3, 0, /* 0xdb */ 1605 {{0, 1}, 1606 {3, 4}, 1607 {6, 7}, 1608 {0, 0} 1609 } 1610 }, 1611 {0, 1, 2, 0, /* 0xdc */ 1612 {{2, 4}, 1613 {6, 7}, 1614 {0, 0}, 1615 {0, 0} 1616 } 1617 }, 1618 {1, 1, 3, 0, /* 0xdd */ 1619 {{0, 0}, 1620 {2, 4}, 1621 {6, 7}, 1622 {0, 0} 1623 } 1624 }, 1625 {0, 1, 2, 0, /* 0xde */ 1626 {{1, 4}, 1627 {6, 7}, 1628 {0, 0}, 1629 {0, 0} 1630 } 1631 }, 1632 {1, 1, 2, 0, /* 0xdf */ 1633 {{0, 4}, 1634 {6, 7}, 1635 {0, 0}, 1636 {0, 0} 1637 } 1638 }, 1639 {0, 1, 1, 0, /* 0xe0 */ 1640 {{5, 7}, 1641 {0, 0}, 1642 {0, 0}, 1643 {0, 0} 1644 } 1645 }, 1646 {1, 1, 2, 0, /* 0xe1 */ 1647 {{0, 0}, 1648 {5, 7}, 1649 {0, 0}, 1650 {0, 0} 1651 } 1652 }, 1653 {0, 1, 2, 0, /* 0xe2 */ 1654 {{1, 1}, 1655 {5, 7}, 1656 {0, 0}, 1657 {0, 0} 1658 } 1659 }, 1660 {1, 1, 2, 0, /* 0xe3 */ 1661 {{0, 1}, 1662 {5, 7}, 1663 {0, 0}, 1664 {0, 0} 1665 } 1666 }, 1667 {0, 1, 2, 0, /* 0xe4 */ 1668 {{2, 2}, 1669 {5, 7}, 1670 {0, 0}, 1671 {0, 0} 1672 } 1673 }, 1674 {1, 1, 3, 0, /* 0xe5 */ 1675 {{0, 0}, 1676 {2, 2}, 1677 {5, 7}, 1678 {0, 0} 1679 } 1680 }, 1681 {0, 1, 2, 0, /* 0xe6 */ 1682 {{1, 2}, 1683 {5, 7}, 1684 {0, 0}, 1685 {0, 0} 1686 } 1687 }, 1688 {1, 1, 2, 0, /* 0xe7 */ 1689 {{0, 2}, 1690 {5, 7}, 1691 {0, 0}, 1692 {0, 0} 1693 } 1694 }, 1695 {0, 1, 2, 0, /* 0xe8 */ 1696 {{3, 3}, 1697 {5, 7}, 1698 {0, 0}, 1699 {0, 0} 1700 } 1701 }, 1702 {1, 1, 3, 0, /* 0xe9 */ 1703 {{0, 0}, 1704 {3, 3}, 1705 {5, 7}, 1706 {0, 0} 1707 } 1708 }, 1709 {0, 1, 3, 0, /* 0xea */ 1710 {{1, 1}, 1711 {3, 3}, 1712 {5, 7}, 1713 {0, 0} 1714 } 1715 }, 1716 {1, 1, 3, 0, /* 0xeb */ 1717 {{0, 1}, 1718 {3, 3}, 1719 {5, 7}, 1720 {0, 0} 1721 } 1722 }, 1723 {0, 1, 2, 0, /* 0xec */ 1724 {{2, 3}, 1725 {5, 7}, 1726 {0, 0}, 1727 {0, 0} 1728 } 1729 }, 1730 {1, 1, 3, 0, /* 0xed */ 1731 {{0, 0}, 1732 {2, 3}, 1733 {5, 7}, 1734 {0, 0} 1735 } 1736 }, 1737 {0, 1, 2, 0, /* 0xee */ 1738 {{1, 3}, 1739 {5, 7}, 1740 {0, 0}, 1741 {0, 0} 1742 } 1743 }, 1744 {1, 1, 2, 0, /* 0xef */ 1745 {{0, 3}, 1746 {5, 7}, 1747 {0, 0}, 1748 {0, 0} 1749 } 1750 }, 1751 {0, 1, 1, 0, /* 0xf0 */ 1752 {{4, 7}, 1753 {0, 0}, 1754 {0, 0}, 1755 {0, 0} 1756 } 1757 }, 1758 {1, 1, 2, 0, /* 0xf1 */ 1759 {{0, 0}, 1760 {4, 7}, 1761 {0, 0}, 1762 {0, 0} 1763 } 1764 }, 1765 {0, 1, 2, 0, /* 0xf2 */ 1766 {{1, 1}, 1767 {4, 7}, 1768 {0, 0}, 1769 {0, 0} 1770 } 1771 }, 1772 {1, 1, 2, 0, /* 0xf3 */ 1773 {{0, 1}, 1774 {4, 7}, 1775 {0, 0}, 1776 {0, 0} 1777 } 1778 }, 1779 {0, 1, 2, 0, /* 0xf4 */ 1780 {{2, 2}, 1781 {4, 7}, 1782 {0, 0}, 1783 {0, 0} 1784 } 1785 }, 1786 {1, 1, 3, 0, /* 0xf5 */ 1787 {{0, 0}, 1788 {2, 2}, 1789 {4, 7}, 1790 {0, 0} 1791 } 1792 }, 1793 {0, 1, 2, 0, /* 0xf6 */ 1794 {{1, 2}, 1795 {4, 7}, 1796 {0, 0}, 1797 {0, 0} 1798 } 1799 }, 1800 {1, 1, 2, 0, /* 0xf7 */ 1801 {{0, 2}, 1802 {4, 7}, 1803 {0, 0}, 1804 {0, 0} 1805 } 1806 }, 1807 {0, 1, 1, 0, /* 0xf8 */ 1808 {{3, 7}, 1809 {0, 0}, 1810 {0, 0}, 1811 {0, 0} 1812 } 1813 }, 1814 {1, 1, 2, 0, /* 0xf9 */ 1815 {{0, 0}, 1816 {3, 7}, 1817 {0, 0}, 1818 {0, 0} 1819 } 1820 }, 1821 {0, 1, 2, 0, /* 0xfa */ 1822 {{1, 1}, 1823 {3, 7}, 1824 {0, 0}, 1825 {0, 0} 1826 } 1827 }, 1828 {1, 1, 2, 0, /* 0xfb */ 1829 {{0, 1}, 1830 {3, 7}, 1831 {0, 0}, 1832 {0, 0} 1833 } 1834 }, 1835 {0, 1, 1, 0, /* 0xfc */ 1836 {{2, 7}, 1837 {0, 0}, 1838 {0, 0}, 1839 {0, 0} 1840 } 1841 }, 1842 {1, 1, 2, 0, /* 0xfd */ 1843 {{0, 0}, 1844 {2, 7}, 1845 {0, 0}, 1846 {0, 0} 1847 } 1848 }, 1849 {0, 1, 1, 0, /* 0xfe */ 1850 {{1, 7}, 1851 {0, 0}, 1852 {0, 0}, 1853 {0, 0} 1854 } 1855 }, 1856 {1, 1, 1, 0, /* 0xff */ 1857 {{0, 7}, 1858 {0, 0}, 1859 {0, 0}, 1860 {0, 0} 1861 } 1862 } 1863}; 1864 1865 1866int 1867sctp_is_address_in_scope(struct sctp_ifa *ifa, 1868 struct sctp_scoping *scope, 1869 int do_update) 1870{ 1871 if ((scope->loopback_scope == 0) && 1872 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) { 1873 /* 1874 * skip loopback if not in scope * 1875 */ 1876 return (0); 1877 } 1878 switch (ifa->address.sa.sa_family) { 1879#ifdef INET 1880 case AF_INET: 1881 if (scope->ipv4_addr_legal) { 1882 struct sockaddr_in *sin; 1883 1884 sin = &ifa->address.sin; 1885 if (sin->sin_addr.s_addr == 0) { 1886 /* not in scope , unspecified */ 1887 return (0); 1888 } 1889 if ((scope->ipv4_local_scope == 0) && 1890 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 1891 /* private address not in scope */ 1892 return (0); 1893 } 1894 } else { 1895 return (0); 1896 } 1897 break; 1898#endif 1899#ifdef INET6 1900 case AF_INET6: 1901 if (scope->ipv6_addr_legal) { 1902 struct sockaddr_in6 *sin6; 1903 1904 /* 1905 * Must update the flags, bummer, which means any 1906 * IFA locks must now be applied HERE <-> 1907 */ 1908 if (do_update) { 1909 sctp_gather_internal_ifa_flags(ifa); 1910 } 1911 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1912 return (0); 1913 } 1914 /* ok to use deprecated addresses? */ 1915 sin6 = &ifa->address.sin6; 1916 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1917 /* skip unspecifed addresses */ 1918 return (0); 1919 } 1920 if ( /* (local_scope == 0) && */ 1921 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 1922 return (0); 1923 } 1924 if ((scope->site_scope == 0) && 1925 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1926 return (0); 1927 } 1928 } else { 1929 return (0); 1930 } 1931 break; 1932#endif 1933 default: 1934 return (0); 1935 } 1936 return (1); 1937} 1938 1939static struct mbuf * 1940sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t * len) 1941{ 1942#if defined(INET) || defined(INET6) 1943 struct sctp_paramhdr *parmh; 1944 struct mbuf *mret; 1945 uint16_t plen; 1946 1947#endif 1948 1949 switch (ifa->address.sa.sa_family) { 1950#ifdef INET 1951 case AF_INET: 1952 plen = (uint16_t) sizeof(struct sctp_ipv4addr_param); 1953 break; 1954#endif 1955#ifdef INET6 1956 case AF_INET6: 1957 plen = (uint16_t) sizeof(struct sctp_ipv6addr_param); 1958 break; 1959#endif 1960 default: 1961 return (m); 1962 } 1963#if defined(INET) || defined(INET6) 1964 if (M_TRAILINGSPACE(m) >= plen) { 1965 /* easy side we just drop it on the end */ 1966 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m))); 1967 mret = m; 1968 } else { 1969 /* Need more space */ 1970 mret = m; 1971 while (SCTP_BUF_NEXT(mret) != NULL) { 1972 mret = SCTP_BUF_NEXT(mret); 1973 } 1974 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA); 1975 if (SCTP_BUF_NEXT(mret) == NULL) { 1976 /* We are hosed, can't add more addresses */ 1977 return (m); 1978 } 1979 mret = SCTP_BUF_NEXT(mret); 1980 parmh = mtod(mret, struct sctp_paramhdr *); 1981 } 1982 /* now add the parameter */ 1983 switch (ifa->address.sa.sa_family) { 1984#ifdef INET 1985 case AF_INET: 1986 { 1987 struct sctp_ipv4addr_param *ipv4p; 1988 struct sockaddr_in *sin; 1989 1990 sin = &ifa->address.sin; 1991 ipv4p = (struct sctp_ipv4addr_param *)parmh; 1992 parmh->param_type = htons(SCTP_IPV4_ADDRESS); 1993 parmh->param_length = htons(plen); 1994 ipv4p->addr = sin->sin_addr.s_addr; 1995 SCTP_BUF_LEN(mret) += plen; 1996 break; 1997 } 1998#endif 1999#ifdef INET6 2000 case AF_INET6: 2001 { 2002 struct sctp_ipv6addr_param *ipv6p; 2003 struct sockaddr_in6 *sin6; 2004 2005 sin6 = &ifa->address.sin6; 2006 ipv6p = (struct sctp_ipv6addr_param *)parmh; 2007 parmh->param_type = htons(SCTP_IPV6_ADDRESS); 2008 parmh->param_length = htons(plen); 2009 memcpy(ipv6p->addr, &sin6->sin6_addr, 2010 sizeof(ipv6p->addr)); 2011 /* clear embedded scope in the address */ 2012 in6_clearscope((struct in6_addr *)ipv6p->addr); 2013 SCTP_BUF_LEN(mret) += plen; 2014 break; 2015 } 2016#endif 2017 default: 2018 return (m); 2019 } 2020 if (len != NULL) { 2021 *len += plen; 2022 } 2023 return (mret); 2024#endif 2025} 2026 2027 2028struct mbuf * 2029sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2030 struct sctp_scoping *scope, 2031 struct mbuf *m_at, int cnt_inits_to, 2032 uint16_t * padding_len, uint16_t * chunk_len) 2033{ 2034 struct sctp_vrf *vrf = NULL; 2035 int cnt, limit_out = 0, total_count; 2036 uint32_t vrf_id; 2037 2038 vrf_id = inp->def_vrf_id; 2039 SCTP_IPI_ADDR_RLOCK(); 2040 vrf = sctp_find_vrf(vrf_id); 2041 if (vrf == NULL) { 2042 SCTP_IPI_ADDR_RUNLOCK(); 2043 return (m_at); 2044 } 2045 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 2046 struct sctp_ifa *sctp_ifap; 2047 struct sctp_ifn *sctp_ifnp; 2048 2049 cnt = cnt_inits_to; 2050 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) { 2051 limit_out = 1; 2052 cnt = SCTP_ADDRESS_LIMIT; 2053 goto skip_count; 2054 } 2055 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 2056 if ((scope->loopback_scope == 0) && 2057 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { 2058 /* 2059 * Skip loopback devices if loopback_scope 2060 * not set 2061 */ 2062 continue; 2063 } 2064 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 2065#ifdef INET 2066 if ((sctp_ifap->address.sa.sa_family == AF_INET) && 2067 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2068 &sctp_ifap->address.sin.sin_addr) != 0)) { 2069 continue; 2070 } 2071#endif 2072#ifdef INET6 2073 if ((sctp_ifap->address.sa.sa_family == AF_INET6) && 2074 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2075 &sctp_ifap->address.sin6.sin6_addr) != 0)) { 2076 continue; 2077 } 2078#endif 2079 if (sctp_is_addr_restricted(stcb, sctp_ifap)) { 2080 continue; 2081 } 2082 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) { 2083 continue; 2084 } 2085 cnt++; 2086 if (cnt > SCTP_ADDRESS_LIMIT) { 2087 break; 2088 } 2089 } 2090 if (cnt > SCTP_ADDRESS_LIMIT) { 2091 break; 2092 } 2093 } 2094skip_count: 2095 if (cnt > 1) { 2096 total_count = 0; 2097 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 2098 cnt = 0; 2099 if ((scope->loopback_scope == 0) && 2100 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { 2101 /* 2102 * Skip loopback devices if 2103 * loopback_scope not set 2104 */ 2105 continue; 2106 } 2107 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 2108#ifdef INET 2109 if ((sctp_ifap->address.sa.sa_family == AF_INET) && 2110 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2111 &sctp_ifap->address.sin.sin_addr) != 0)) { 2112 continue; 2113 } 2114#endif 2115#ifdef INET6 2116 if ((sctp_ifap->address.sa.sa_family == AF_INET6) && 2117 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2118 &sctp_ifap->address.sin6.sin6_addr) != 0)) { 2119 continue; 2120 } 2121#endif 2122 if (sctp_is_addr_restricted(stcb, sctp_ifap)) { 2123 continue; 2124 } 2125 if (sctp_is_address_in_scope(sctp_ifap, 2126 scope, 0) == 0) { 2127 continue; 2128 } 2129 if ((chunk_len != NULL) && 2130 (padding_len != NULL) && 2131 (*padding_len > 0)) { 2132 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len); 2133 SCTP_BUF_LEN(m_at) += *padding_len; 2134 *chunk_len += *padding_len; 2135 *padding_len = 0; 2136 } 2137 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len); 2138 if (limit_out) { 2139 cnt++; 2140 total_count++; 2141 if (cnt >= 2) { 2142 /* 2143 * two from each 2144 * address 2145 */ 2146 break; 2147 } 2148 if (total_count > SCTP_ADDRESS_LIMIT) { 2149 /* No more addresses */ 2150 break; 2151 } 2152 } 2153 } 2154 } 2155 } 2156 } else { 2157 struct sctp_laddr *laddr; 2158 2159 cnt = cnt_inits_to; 2160 /* First, how many ? */ 2161 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2162 if (laddr->ifa == NULL) { 2163 continue; 2164 } 2165 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 2166 /* 2167 * Address being deleted by the system, dont 2168 * list. 2169 */ 2170 continue; 2171 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2172 /* 2173 * Address being deleted on this ep don't 2174 * list. 2175 */ 2176 continue; 2177 } 2178 if (sctp_is_address_in_scope(laddr->ifa, 2179 scope, 1) == 0) { 2180 continue; 2181 } 2182 cnt++; 2183 } 2184 /* 2185 * To get through a NAT we only list addresses if we have 2186 * more than one. That way if you just bind a single address 2187 * we let the source of the init dictate our address. 2188 */ 2189 if (cnt > 1) { 2190 cnt = cnt_inits_to; 2191 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2192 if (laddr->ifa == NULL) { 2193 continue; 2194 } 2195 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 2196 continue; 2197 } 2198 if (sctp_is_address_in_scope(laddr->ifa, 2199 scope, 0) == 0) { 2200 continue; 2201 } 2202 if ((chunk_len != NULL) && 2203 (padding_len != NULL) && 2204 (*padding_len > 0)) { 2205 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len); 2206 SCTP_BUF_LEN(m_at) += *padding_len; 2207 *chunk_len += *padding_len; 2208 *padding_len = 0; 2209 } 2210 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len); 2211 cnt++; 2212 if (cnt >= SCTP_ADDRESS_LIMIT) { 2213 break; 2214 } 2215 } 2216 } 2217 } 2218 SCTP_IPI_ADDR_RUNLOCK(); 2219 return (m_at); 2220} 2221 2222static struct sctp_ifa * 2223sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa, 2224 uint8_t dest_is_loop, 2225 uint8_t dest_is_priv, 2226 sa_family_t fam) 2227{ 2228 uint8_t dest_is_global = 0; 2229 2230 /* dest_is_priv is true if destination is a private address */ 2231 /* dest_is_loop is true if destination is a loopback addresses */ 2232 2233 /** 2234 * Here we determine if its a preferred address. A preferred address 2235 * means it is the same scope or higher scope then the destination. 2236 * L = loopback, P = private, G = global 2237 * ----------------------------------------- 2238 * src | dest | result 2239 * ---------------------------------------- 2240 * L | L | yes 2241 * ----------------------------------------- 2242 * P | L | yes-v4 no-v6 2243 * ----------------------------------------- 2244 * G | L | yes-v4 no-v6 2245 * ----------------------------------------- 2246 * L | P | no 2247 * ----------------------------------------- 2248 * P | P | yes 2249 * ----------------------------------------- 2250 * G | P | no 2251 * ----------------------------------------- 2252 * L | G | no 2253 * ----------------------------------------- 2254 * P | G | no 2255 * ----------------------------------------- 2256 * G | G | yes 2257 * ----------------------------------------- 2258 */ 2259 2260 if (ifa->address.sa.sa_family != fam) { 2261 /* forget mis-matched family */ 2262 return (NULL); 2263 } 2264 if ((dest_is_priv == 0) && (dest_is_loop == 0)) { 2265 dest_is_global = 1; 2266 } 2267 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:"); 2268 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa); 2269 /* Ok the address may be ok */ 2270#ifdef INET6 2271 if (fam == AF_INET6) { 2272 /* ok to use deprecated addresses? no lets not! */ 2273 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2274 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n"); 2275 return (NULL); 2276 } 2277 if (ifa->src_is_priv && !ifa->src_is_loop) { 2278 if (dest_is_loop) { 2279 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n"); 2280 return (NULL); 2281 } 2282 } 2283 if (ifa->src_is_glob) { 2284 if (dest_is_loop) { 2285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n"); 2286 return (NULL); 2287 } 2288 } 2289 } 2290#endif 2291 /* 2292 * Now that we know what is what, implement or table this could in 2293 * theory be done slicker (it used to be), but this is 2294 * straightforward and easier to validate :-) 2295 */ 2296 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n", 2297 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob); 2298 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n", 2299 dest_is_loop, dest_is_priv, dest_is_global); 2300 2301 if ((ifa->src_is_loop) && (dest_is_priv)) { 2302 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n"); 2303 return (NULL); 2304 } 2305 if ((ifa->src_is_glob) && (dest_is_priv)) { 2306 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n"); 2307 return (NULL); 2308 } 2309 if ((ifa->src_is_loop) && (dest_is_global)) { 2310 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n"); 2311 return (NULL); 2312 } 2313 if ((ifa->src_is_priv) && (dest_is_global)) { 2314 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n"); 2315 return (NULL); 2316 } 2317 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n"); 2318 /* its a preferred address */ 2319 return (ifa); 2320} 2321 2322static struct sctp_ifa * 2323sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa, 2324 uint8_t dest_is_loop, 2325 uint8_t dest_is_priv, 2326 sa_family_t fam) 2327{ 2328 uint8_t dest_is_global = 0; 2329 2330 /** 2331 * Here we determine if its a acceptable address. A acceptable 2332 * address means it is the same scope or higher scope but we can 2333 * allow for NAT which means its ok to have a global dest and a 2334 * private src. 2335 * 2336 * L = loopback, P = private, G = global 2337 * ----------------------------------------- 2338 * src | dest | result 2339 * ----------------------------------------- 2340 * L | L | yes 2341 * ----------------------------------------- 2342 * P | L | yes-v4 no-v6 2343 * ----------------------------------------- 2344 * G | L | yes 2345 * ----------------------------------------- 2346 * L | P | no 2347 * ----------------------------------------- 2348 * P | P | yes 2349 * ----------------------------------------- 2350 * G | P | yes - May not work 2351 * ----------------------------------------- 2352 * L | G | no 2353 * ----------------------------------------- 2354 * P | G | yes - May not work 2355 * ----------------------------------------- 2356 * G | G | yes 2357 * ----------------------------------------- 2358 */ 2359 2360 if (ifa->address.sa.sa_family != fam) { 2361 /* forget non matching family */ 2362 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n", 2363 ifa->address.sa.sa_family, fam); 2364 return (NULL); 2365 } 2366 /* Ok the address may be ok */ 2367 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa); 2368 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n", 2369 dest_is_loop, dest_is_priv); 2370 if ((dest_is_loop == 0) && (dest_is_priv == 0)) { 2371 dest_is_global = 1; 2372 } 2373#ifdef INET6 2374 if (fam == AF_INET6) { 2375 /* ok to use deprecated addresses? */ 2376 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2377 return (NULL); 2378 } 2379 if (ifa->src_is_priv) { 2380 /* Special case, linklocal to loop */ 2381 if (dest_is_loop) 2382 return (NULL); 2383 } 2384 } 2385#endif 2386 /* 2387 * Now that we know what is what, implement our table. This could in 2388 * theory be done slicker (it used to be), but this is 2389 * straightforward and easier to validate :-) 2390 */ 2391 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n", 2392 ifa->src_is_loop, 2393 dest_is_priv); 2394 if ((ifa->src_is_loop == 1) && (dest_is_priv)) { 2395 return (NULL); 2396 } 2397 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n", 2398 ifa->src_is_loop, 2399 dest_is_global); 2400 if ((ifa->src_is_loop == 1) && (dest_is_global)) { 2401 return (NULL); 2402 } 2403 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n"); 2404 /* its an acceptable address */ 2405 return (ifa); 2406} 2407 2408int 2409sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 2410{ 2411 struct sctp_laddr *laddr; 2412 2413 if (stcb == NULL) { 2414 /* There are no restrictions, no TCB :-) */ 2415 return (0); 2416 } 2417 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 2418 if (laddr->ifa == NULL) { 2419 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n", 2420 __FUNCTION__); 2421 continue; 2422 } 2423 if (laddr->ifa == ifa) { 2424 /* Yes it is on the list */ 2425 return (1); 2426 } 2427 } 2428 return (0); 2429} 2430 2431 2432int 2433sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 2434{ 2435 struct sctp_laddr *laddr; 2436 2437 if (ifa == NULL) 2438 return (0); 2439 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2440 if (laddr->ifa == NULL) { 2441 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n", 2442 __FUNCTION__); 2443 continue; 2444 } 2445 if ((laddr->ifa == ifa) && laddr->action == 0) 2446 /* same pointer */ 2447 return (1); 2448 } 2449 return (0); 2450} 2451 2452 2453 2454static struct sctp_ifa * 2455sctp_choose_boundspecific_inp(struct sctp_inpcb *inp, 2456 sctp_route_t * ro, 2457 uint32_t vrf_id, 2458 int non_asoc_addr_ok, 2459 uint8_t dest_is_priv, 2460 uint8_t dest_is_loop, 2461 sa_family_t fam) 2462{ 2463 struct sctp_laddr *laddr, *starting_point; 2464 void *ifn; 2465 int resettotop = 0; 2466 struct sctp_ifn *sctp_ifn; 2467 struct sctp_ifa *sctp_ifa, *sifa; 2468 struct sctp_vrf *vrf; 2469 uint32_t ifn_index; 2470 2471 vrf = sctp_find_vrf(vrf_id); 2472 if (vrf == NULL) 2473 return (NULL); 2474 2475 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2476 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2477 sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2478 /* 2479 * first question, is the ifn we will emit on in our list, if so, we 2480 * want such an address. Note that we first looked for a preferred 2481 * address. 2482 */ 2483 if (sctp_ifn) { 2484 /* is a preferred one on the interface we route out? */ 2485 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2486#ifdef INET 2487 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 2488 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2489 &sctp_ifa->address.sin.sin_addr) != 0)) { 2490 continue; 2491 } 2492#endif 2493#ifdef INET6 2494 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 2495 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2496 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 2497 continue; 2498 } 2499#endif 2500 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2501 (non_asoc_addr_ok == 0)) 2502 continue; 2503 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, 2504 dest_is_loop, 2505 dest_is_priv, fam); 2506 if (sifa == NULL) 2507 continue; 2508 if (sctp_is_addr_in_ep(inp, sifa)) { 2509 atomic_add_int(&sifa->refcount, 1); 2510 return (sifa); 2511 } 2512 } 2513 } 2514 /* 2515 * ok, now we now need to find one on the list of the addresses. We 2516 * can't get one on the emitting interface so let's find first a 2517 * preferred one. If not that an acceptable one otherwise... we 2518 * return NULL. 2519 */ 2520 starting_point = inp->next_addr_touse; 2521once_again: 2522 if (inp->next_addr_touse == NULL) { 2523 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); 2524 resettotop = 1; 2525 } 2526 for (laddr = inp->next_addr_touse; laddr; 2527 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2528 if (laddr->ifa == NULL) { 2529 /* address has been removed */ 2530 continue; 2531 } 2532 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2533 /* address is being deleted */ 2534 continue; 2535 } 2536 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, 2537 dest_is_priv, fam); 2538 if (sifa == NULL) 2539 continue; 2540 atomic_add_int(&sifa->refcount, 1); 2541 return (sifa); 2542 } 2543 if (resettotop == 0) { 2544 inp->next_addr_touse = NULL; 2545 goto once_again; 2546 } 2547 inp->next_addr_touse = starting_point; 2548 resettotop = 0; 2549once_again_too: 2550 if (inp->next_addr_touse == NULL) { 2551 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); 2552 resettotop = 1; 2553 } 2554 /* ok, what about an acceptable address in the inp */ 2555 for (laddr = inp->next_addr_touse; laddr; 2556 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2557 if (laddr->ifa == NULL) { 2558 /* address has been removed */ 2559 continue; 2560 } 2561 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2562 /* address is being deleted */ 2563 continue; 2564 } 2565 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, 2566 dest_is_priv, fam); 2567 if (sifa == NULL) 2568 continue; 2569 atomic_add_int(&sifa->refcount, 1); 2570 return (sifa); 2571 } 2572 if (resettotop == 0) { 2573 inp->next_addr_touse = NULL; 2574 goto once_again_too; 2575 } 2576 /* 2577 * no address bound can be a source for the destination we are in 2578 * trouble 2579 */ 2580 return (NULL); 2581} 2582 2583 2584 2585static struct sctp_ifa * 2586sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp, 2587 struct sctp_tcb *stcb, 2588 sctp_route_t * ro, 2589 uint32_t vrf_id, 2590 uint8_t dest_is_priv, 2591 uint8_t dest_is_loop, 2592 int non_asoc_addr_ok, 2593 sa_family_t fam) 2594{ 2595 struct sctp_laddr *laddr, *starting_point; 2596 void *ifn; 2597 struct sctp_ifn *sctp_ifn; 2598 struct sctp_ifa *sctp_ifa, *sifa; 2599 uint8_t start_at_beginning = 0; 2600 struct sctp_vrf *vrf; 2601 uint32_t ifn_index; 2602 2603 /* 2604 * first question, is the ifn we will emit on in our list, if so, we 2605 * want that one. 2606 */ 2607 vrf = sctp_find_vrf(vrf_id); 2608 if (vrf == NULL) 2609 return (NULL); 2610 2611 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2612 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2613 sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2614 2615 /* 2616 * first question, is the ifn we will emit on in our list? If so, 2617 * we want that one. First we look for a preferred. Second, we go 2618 * for an acceptable. 2619 */ 2620 if (sctp_ifn) { 2621 /* first try for a preferred address on the ep */ 2622 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2623#ifdef INET 2624 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 2625 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2626 &sctp_ifa->address.sin.sin_addr) != 0)) { 2627 continue; 2628 } 2629#endif 2630#ifdef INET6 2631 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 2632 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2633 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 2634 continue; 2635 } 2636#endif 2637 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2638 continue; 2639 if (sctp_is_addr_in_ep(inp, sctp_ifa)) { 2640 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam); 2641 if (sifa == NULL) 2642 continue; 2643 if (((non_asoc_addr_ok == 0) && 2644 (sctp_is_addr_restricted(stcb, sifa))) || 2645 (non_asoc_addr_ok && 2646 (sctp_is_addr_restricted(stcb, sifa)) && 2647 (!sctp_is_addr_pending(stcb, sifa)))) { 2648 /* on the no-no list */ 2649 continue; 2650 } 2651 atomic_add_int(&sifa->refcount, 1); 2652 return (sifa); 2653 } 2654 } 2655 /* next try for an acceptable address on the ep */ 2656 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2657#ifdef INET 2658 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 2659 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2660 &sctp_ifa->address.sin.sin_addr) != 0)) { 2661 continue; 2662 } 2663#endif 2664#ifdef INET6 2665 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 2666 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2667 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 2668 continue; 2669 } 2670#endif 2671 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2672 continue; 2673 if (sctp_is_addr_in_ep(inp, sctp_ifa)) { 2674 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam); 2675 if (sifa == NULL) 2676 continue; 2677 if (((non_asoc_addr_ok == 0) && 2678 (sctp_is_addr_restricted(stcb, sifa))) || 2679 (non_asoc_addr_ok && 2680 (sctp_is_addr_restricted(stcb, sifa)) && 2681 (!sctp_is_addr_pending(stcb, sifa)))) { 2682 /* on the no-no list */ 2683 continue; 2684 } 2685 atomic_add_int(&sifa->refcount, 1); 2686 return (sifa); 2687 } 2688 } 2689 2690 } 2691 /* 2692 * if we can't find one like that then we must look at all addresses 2693 * bound to pick one at first preferable then secondly acceptable. 2694 */ 2695 starting_point = stcb->asoc.last_used_address; 2696sctp_from_the_top: 2697 if (stcb->asoc.last_used_address == NULL) { 2698 start_at_beginning = 1; 2699 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); 2700 } 2701 /* search beginning with the last used address */ 2702 for (laddr = stcb->asoc.last_used_address; laddr; 2703 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2704 if (laddr->ifa == NULL) { 2705 /* address has been removed */ 2706 continue; 2707 } 2708 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2709 /* address is being deleted */ 2710 continue; 2711 } 2712 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam); 2713 if (sifa == NULL) 2714 continue; 2715 if (((non_asoc_addr_ok == 0) && 2716 (sctp_is_addr_restricted(stcb, sifa))) || 2717 (non_asoc_addr_ok && 2718 (sctp_is_addr_restricted(stcb, sifa)) && 2719 (!sctp_is_addr_pending(stcb, sifa)))) { 2720 /* on the no-no list */ 2721 continue; 2722 } 2723 stcb->asoc.last_used_address = laddr; 2724 atomic_add_int(&sifa->refcount, 1); 2725 return (sifa); 2726 } 2727 if (start_at_beginning == 0) { 2728 stcb->asoc.last_used_address = NULL; 2729 goto sctp_from_the_top; 2730 } 2731 /* now try for any higher scope than the destination */ 2732 stcb->asoc.last_used_address = starting_point; 2733 start_at_beginning = 0; 2734sctp_from_the_top2: 2735 if (stcb->asoc.last_used_address == NULL) { 2736 start_at_beginning = 1; 2737 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); 2738 } 2739 /* search beginning with the last used address */ 2740 for (laddr = stcb->asoc.last_used_address; laddr; 2741 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2742 if (laddr->ifa == NULL) { 2743 /* address has been removed */ 2744 continue; 2745 } 2746 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2747 /* address is being deleted */ 2748 continue; 2749 } 2750 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, 2751 dest_is_priv, fam); 2752 if (sifa == NULL) 2753 continue; 2754 if (((non_asoc_addr_ok == 0) && 2755 (sctp_is_addr_restricted(stcb, sifa))) || 2756 (non_asoc_addr_ok && 2757 (sctp_is_addr_restricted(stcb, sifa)) && 2758 (!sctp_is_addr_pending(stcb, sifa)))) { 2759 /* on the no-no list */ 2760 continue; 2761 } 2762 stcb->asoc.last_used_address = laddr; 2763 atomic_add_int(&sifa->refcount, 1); 2764 return (sifa); 2765 } 2766 if (start_at_beginning == 0) { 2767 stcb->asoc.last_used_address = NULL; 2768 goto sctp_from_the_top2; 2769 } 2770 return (NULL); 2771} 2772 2773static struct sctp_ifa * 2774sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn, 2775 struct sctp_inpcb *inp, 2776 struct sctp_tcb *stcb, 2777 int non_asoc_addr_ok, 2778 uint8_t dest_is_loop, 2779 uint8_t dest_is_priv, 2780 int addr_wanted, 2781 sa_family_t fam, 2782 sctp_route_t * ro 2783) 2784{ 2785 struct sctp_ifa *ifa, *sifa; 2786 int num_eligible_addr = 0; 2787 2788#ifdef INET6 2789 struct sockaddr_in6 sin6, lsa6; 2790 2791 if (fam == AF_INET6) { 2792 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6)); 2793 (void)sa6_recoverscope(&sin6); 2794 } 2795#endif /* INET6 */ 2796 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { 2797#ifdef INET 2798 if ((ifa->address.sa.sa_family == AF_INET) && 2799 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2800 &ifa->address.sin.sin_addr) != 0)) { 2801 continue; 2802 } 2803#endif 2804#ifdef INET6 2805 if ((ifa->address.sa.sa_family == AF_INET6) && 2806 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2807 &ifa->address.sin6.sin6_addr) != 0)) { 2808 continue; 2809 } 2810#endif 2811 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2812 (non_asoc_addr_ok == 0)) 2813 continue; 2814 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, 2815 dest_is_priv, fam); 2816 if (sifa == NULL) 2817 continue; 2818#ifdef INET6 2819 if (fam == AF_INET6 && 2820 dest_is_loop && 2821 sifa->src_is_loop && sifa->src_is_priv) { 2822 /* 2823 * don't allow fe80::1 to be a src on loop ::1, we 2824 * don't list it to the peer so we will get an 2825 * abort. 2826 */ 2827 continue; 2828 } 2829 if (fam == AF_INET6 && 2830 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) && 2831 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 2832 /* 2833 * link-local <-> link-local must belong to the same 2834 * scope. 2835 */ 2836 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6)); 2837 (void)sa6_recoverscope(&lsa6); 2838 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) { 2839 continue; 2840 } 2841 } 2842#endif /* INET6 */ 2843 2844 /* 2845 * Check if the IPv6 address matches to next-hop. In the 2846 * mobile case, old IPv6 address may be not deleted from the 2847 * interface. Then, the interface has previous and new 2848 * addresses. We should use one corresponding to the 2849 * next-hop. (by micchie) 2850 */ 2851#ifdef INET6 2852 if (stcb && fam == AF_INET6 && 2853 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) { 2854 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro) 2855 == 0) { 2856 continue; 2857 } 2858 } 2859#endif 2860#ifdef INET 2861 /* Avoid topologically incorrect IPv4 address */ 2862 if (stcb && fam == AF_INET && 2863 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) { 2864 if (sctp_v4src_match_nexthop(sifa, ro) == 0) { 2865 continue; 2866 } 2867 } 2868#endif 2869 if (stcb) { 2870 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2871 continue; 2872 } 2873 if (((non_asoc_addr_ok == 0) && 2874 (sctp_is_addr_restricted(stcb, sifa))) || 2875 (non_asoc_addr_ok && 2876 (sctp_is_addr_restricted(stcb, sifa)) && 2877 (!sctp_is_addr_pending(stcb, sifa)))) { 2878 /* 2879 * It is restricted for some reason.. 2880 * probably not yet added. 2881 */ 2882 continue; 2883 } 2884 } 2885 if (num_eligible_addr >= addr_wanted) { 2886 return (sifa); 2887 } 2888 num_eligible_addr++; 2889 } 2890 return (NULL); 2891} 2892 2893 2894static int 2895sctp_count_num_preferred_boundall(struct sctp_ifn *ifn, 2896 struct sctp_inpcb *inp, 2897 struct sctp_tcb *stcb, 2898 int non_asoc_addr_ok, 2899 uint8_t dest_is_loop, 2900 uint8_t dest_is_priv, 2901 sa_family_t fam) 2902{ 2903 struct sctp_ifa *ifa, *sifa; 2904 int num_eligible_addr = 0; 2905 2906 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { 2907#ifdef INET 2908 if ((ifa->address.sa.sa_family == AF_INET) && 2909 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2910 &ifa->address.sin.sin_addr) != 0)) { 2911 continue; 2912 } 2913#endif 2914#ifdef INET6 2915 if ((ifa->address.sa.sa_family == AF_INET6) && 2916 (stcb != NULL) && 2917 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2918 &ifa->address.sin6.sin6_addr) != 0)) { 2919 continue; 2920 } 2921#endif 2922 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2923 (non_asoc_addr_ok == 0)) { 2924 continue; 2925 } 2926 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, 2927 dest_is_priv, fam); 2928 if (sifa == NULL) { 2929 continue; 2930 } 2931 if (stcb) { 2932 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2933 continue; 2934 } 2935 if (((non_asoc_addr_ok == 0) && 2936 (sctp_is_addr_restricted(stcb, sifa))) || 2937 (non_asoc_addr_ok && 2938 (sctp_is_addr_restricted(stcb, sifa)) && 2939 (!sctp_is_addr_pending(stcb, sifa)))) { 2940 /* 2941 * It is restricted for some reason.. 2942 * probably not yet added. 2943 */ 2944 continue; 2945 } 2946 } 2947 num_eligible_addr++; 2948 } 2949 return (num_eligible_addr); 2950} 2951 2952static struct sctp_ifa * 2953sctp_choose_boundall(struct sctp_inpcb *inp, 2954 struct sctp_tcb *stcb, 2955 struct sctp_nets *net, 2956 sctp_route_t * ro, 2957 uint32_t vrf_id, 2958 uint8_t dest_is_priv, 2959 uint8_t dest_is_loop, 2960 int non_asoc_addr_ok, 2961 sa_family_t fam) 2962{ 2963 int cur_addr_num = 0, num_preferred = 0; 2964 void *ifn; 2965 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn; 2966 struct sctp_ifa *sctp_ifa, *sifa; 2967 uint32_t ifn_index; 2968 struct sctp_vrf *vrf; 2969 2970#ifdef INET 2971 int retried = 0; 2972 2973#endif 2974 2975 /*- 2976 * For boundall we can use any address in the association. 2977 * If non_asoc_addr_ok is set we can use any address (at least in 2978 * theory). So we look for preferred addresses first. If we find one, 2979 * we use it. Otherwise we next try to get an address on the 2980 * interface, which we should be able to do (unless non_asoc_addr_ok 2981 * is false and we are routed out that way). In these cases where we 2982 * can't use the address of the interface we go through all the 2983 * ifn's looking for an address we can use and fill that in. Punting 2984 * means we send back address 0, which will probably cause problems 2985 * actually since then IP will fill in the address of the route ifn, 2986 * which means we probably already rejected it.. i.e. here comes an 2987 * abort :-<. 2988 */ 2989 vrf = sctp_find_vrf(vrf_id); 2990 if (vrf == NULL) 2991 return (NULL); 2992 2993 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2994 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2995 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index); 2996 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2997 if (sctp_ifn == NULL) { 2998 /* ?? We don't have this guy ?? */ 2999 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n"); 3000 goto bound_all_plan_b; 3001 } 3002 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n", 3003 ifn_index, sctp_ifn->ifn_name); 3004 3005 if (net) { 3006 cur_addr_num = net->indx_of_eligible_next_to_use; 3007 } 3008 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, 3009 inp, stcb, 3010 non_asoc_addr_ok, 3011 dest_is_loop, 3012 dest_is_priv, fam); 3013 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n", 3014 num_preferred, sctp_ifn->ifn_name); 3015 if (num_preferred == 0) { 3016 /* 3017 * no eligible addresses, we must use some other interface 3018 * address if we can find one. 3019 */ 3020 goto bound_all_plan_b; 3021 } 3022 /* 3023 * Ok we have num_eligible_addr set with how many we can use, this 3024 * may vary from call to call due to addresses being deprecated 3025 * etc.. 3026 */ 3027 if (cur_addr_num >= num_preferred) { 3028 cur_addr_num = 0; 3029 } 3030 /* 3031 * select the nth address from the list (where cur_addr_num is the 3032 * nth) and 0 is the first one, 1 is the second one etc... 3033 */ 3034 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num); 3035 3036 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop, 3037 dest_is_priv, cur_addr_num, fam, ro); 3038 3039 /* if sctp_ifa is NULL something changed??, fall to plan b. */ 3040 if (sctp_ifa) { 3041 atomic_add_int(&sctp_ifa->refcount, 1); 3042 if (net) { 3043 /* save off where the next one we will want */ 3044 net->indx_of_eligible_next_to_use = cur_addr_num + 1; 3045 } 3046 return (sctp_ifa); 3047 } 3048 /* 3049 * plan_b: Look at all interfaces and find a preferred address. If 3050 * no preferred fall through to plan_c. 3051 */ 3052bound_all_plan_b: 3053 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n"); 3054 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3055 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n", 3056 sctp_ifn->ifn_name); 3057 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3058 /* wrong base scope */ 3059 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n"); 3060 continue; 3061 } 3062 if ((sctp_ifn == looked_at) && looked_at) { 3063 /* already looked at this guy */ 3064 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n"); 3065 continue; 3066 } 3067 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, 3068 dest_is_loop, dest_is_priv, fam); 3069 SCTPDBG(SCTP_DEBUG_OUTPUT2, 3070 "Found ifn:%p %d preferred source addresses\n", 3071 ifn, num_preferred); 3072 if (num_preferred == 0) { 3073 /* None on this interface. */ 3074 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n"); 3075 continue; 3076 } 3077 SCTPDBG(SCTP_DEBUG_OUTPUT2, 3078 "num preferred:%d on interface:%p cur_addr_num:%d\n", 3079 num_preferred, (void *)sctp_ifn, cur_addr_num); 3080 3081 /* 3082 * Ok we have num_eligible_addr set with how many we can 3083 * use, this may vary from call to call due to addresses 3084 * being deprecated etc.. 3085 */ 3086 if (cur_addr_num >= num_preferred) { 3087 cur_addr_num = 0; 3088 } 3089 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop, 3090 dest_is_priv, cur_addr_num, fam, ro); 3091 if (sifa == NULL) 3092 continue; 3093 if (net) { 3094 net->indx_of_eligible_next_to_use = cur_addr_num + 1; 3095 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n", 3096 cur_addr_num); 3097 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:"); 3098 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa); 3099 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:"); 3100 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa); 3101 } 3102 atomic_add_int(&sifa->refcount, 1); 3103 return (sifa); 3104 } 3105#ifdef INET 3106again_with_private_addresses_allowed: 3107#endif 3108 /* plan_c: do we have an acceptable address on the emit interface */ 3109 sifa = NULL; 3110 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n"); 3111 if (emit_ifn == NULL) { 3112 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n"); 3113 goto plan_d; 3114 } 3115 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) { 3116 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa); 3117#ifdef INET 3118 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 3119 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 3120 &sctp_ifa->address.sin.sin_addr) != 0)) { 3121 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n"); 3122 continue; 3123 } 3124#endif 3125#ifdef INET6 3126 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 3127 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 3128 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 3129 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n"); 3130 continue; 3131 } 3132#endif 3133 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3134 (non_asoc_addr_ok == 0)) { 3135 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n"); 3136 continue; 3137 } 3138 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, 3139 dest_is_priv, fam); 3140 if (sifa == NULL) { 3141 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n"); 3142 continue; 3143 } 3144 if (stcb) { 3145 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) { 3146 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n"); 3147 sifa = NULL; 3148 continue; 3149 } 3150 if (((non_asoc_addr_ok == 0) && 3151 (sctp_is_addr_restricted(stcb, sifa))) || 3152 (non_asoc_addr_ok && 3153 (sctp_is_addr_restricted(stcb, sifa)) && 3154 (!sctp_is_addr_pending(stcb, sifa)))) { 3155 /* 3156 * It is restricted for some reason.. 3157 * probably not yet added. 3158 */ 3159 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n"); 3160 sifa = NULL; 3161 continue; 3162 } 3163 } else { 3164 SCTP_PRINTF("Stcb is null - no print\n"); 3165 } 3166 atomic_add_int(&sifa->refcount, 1); 3167 goto out; 3168 } 3169plan_d: 3170 /* 3171 * plan_d: We are in trouble. No preferred address on the emit 3172 * interface. And not even a preferred address on all interfaces. Go 3173 * out and see if we can find an acceptable address somewhere 3174 * amongst all interfaces. 3175 */ 3176 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at); 3177 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3178 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3179 /* wrong base scope */ 3180 continue; 3181 } 3182 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3183#ifdef INET 3184 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 3185 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 3186 &sctp_ifa->address.sin.sin_addr) != 0)) { 3187 continue; 3188 } 3189#endif 3190#ifdef INET6 3191 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 3192 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 3193 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 3194 continue; 3195 } 3196#endif 3197 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3198 (non_asoc_addr_ok == 0)) 3199 continue; 3200 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, 3201 dest_is_loop, 3202 dest_is_priv, fam); 3203 if (sifa == NULL) 3204 continue; 3205 if (stcb) { 3206 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) { 3207 sifa = NULL; 3208 continue; 3209 } 3210 if (((non_asoc_addr_ok == 0) && 3211 (sctp_is_addr_restricted(stcb, sifa))) || 3212 (non_asoc_addr_ok && 3213 (sctp_is_addr_restricted(stcb, sifa)) && 3214 (!sctp_is_addr_pending(stcb, sifa)))) { 3215 /* 3216 * It is restricted for some 3217 * reason.. probably not yet added. 3218 */ 3219 sifa = NULL; 3220 continue; 3221 } 3222 } 3223 goto out; 3224 } 3225 } 3226#ifdef INET 3227 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) { 3228 stcb->asoc.scope.ipv4_local_scope = 1; 3229 retried = 1; 3230 goto again_with_private_addresses_allowed; 3231 } else if (retried == 1) { 3232 stcb->asoc.scope.ipv4_local_scope = 0; 3233 } 3234#endif 3235out: 3236#ifdef INET 3237 if (sifa) { 3238 if (retried == 1) { 3239 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3240 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3241 /* wrong base scope */ 3242 continue; 3243 } 3244 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3245 struct sctp_ifa *tmp_sifa; 3246 3247#ifdef INET 3248 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 3249 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 3250 &sctp_ifa->address.sin.sin_addr) != 0)) { 3251 continue; 3252 } 3253#endif 3254#ifdef INET6 3255 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 3256 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 3257 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 3258 continue; 3259 } 3260#endif 3261 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3262 (non_asoc_addr_ok == 0)) 3263 continue; 3264 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, 3265 dest_is_loop, 3266 dest_is_priv, fam); 3267 if (tmp_sifa == NULL) { 3268 continue; 3269 } 3270 if (tmp_sifa == sifa) { 3271 continue; 3272 } 3273 if (stcb) { 3274 if (sctp_is_address_in_scope(tmp_sifa, 3275 &stcb->asoc.scope, 0) == 0) { 3276 continue; 3277 } 3278 if (((non_asoc_addr_ok == 0) && 3279 (sctp_is_addr_restricted(stcb, tmp_sifa))) || 3280 (non_asoc_addr_ok && 3281 (sctp_is_addr_restricted(stcb, tmp_sifa)) && 3282 (!sctp_is_addr_pending(stcb, tmp_sifa)))) { 3283 /* 3284 * It is restricted 3285 * for some reason.. 3286 * probably not yet 3287 * added. 3288 */ 3289 continue; 3290 } 3291 } 3292 if ((tmp_sifa->address.sin.sin_family == AF_INET) && 3293 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) { 3294 sctp_add_local_addr_restricted(stcb, tmp_sifa); 3295 } 3296 } 3297 } 3298 } 3299 atomic_add_int(&sifa->refcount, 1); 3300 } 3301#endif 3302 return (sifa); 3303} 3304 3305 3306 3307/* tcb may be NULL */ 3308struct sctp_ifa * 3309sctp_source_address_selection(struct sctp_inpcb *inp, 3310 struct sctp_tcb *stcb, 3311 sctp_route_t * ro, 3312 struct sctp_nets *net, 3313 int non_asoc_addr_ok, uint32_t vrf_id) 3314{ 3315 struct sctp_ifa *answer; 3316 uint8_t dest_is_priv, dest_is_loop; 3317 sa_family_t fam; 3318 3319#ifdef INET 3320 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst; 3321 3322#endif 3323#ifdef INET6 3324 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst; 3325 3326#endif 3327 3328 /** 3329 * Rules: - Find the route if needed, cache if I can. - Look at 3330 * interface address in route, Is it in the bound list. If so we 3331 * have the best source. - If not we must rotate amongst the 3332 * addresses. 3333 * 3334 * Cavets and issues 3335 * 3336 * Do we need to pay attention to scope. We can have a private address 3337 * or a global address we are sourcing or sending to. So if we draw 3338 * it out 3339 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3340 * For V4 3341 * ------------------------------------------ 3342 * source * dest * result 3343 * ----------------------------------------- 3344 * <a> Private * Global * NAT 3345 * ----------------------------------------- 3346 * <b> Private * Private * No problem 3347 * ----------------------------------------- 3348 * <c> Global * Private * Huh, How will this work? 3349 * ----------------------------------------- 3350 * <d> Global * Global * No Problem 3351 *------------------------------------------ 3352 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3353 * For V6 3354 *------------------------------------------ 3355 * source * dest * result 3356 * ----------------------------------------- 3357 * <a> Linklocal * Global * 3358 * ----------------------------------------- 3359 * <b> Linklocal * Linklocal * No problem 3360 * ----------------------------------------- 3361 * <c> Global * Linklocal * Huh, How will this work? 3362 * ----------------------------------------- 3363 * <d> Global * Global * No Problem 3364 *------------------------------------------ 3365 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3366 * 3367 * And then we add to that what happens if there are multiple addresses 3368 * assigned to an interface. Remember the ifa on a ifn is a linked 3369 * list of addresses. So one interface can have more than one IP 3370 * address. What happens if we have both a private and a global 3371 * address? Do we then use context of destination to sort out which 3372 * one is best? And what about NAT's sending P->G may get you a NAT 3373 * translation, or should you select the G thats on the interface in 3374 * preference. 3375 * 3376 * Decisions: 3377 * 3378 * - count the number of addresses on the interface. 3379 * - if it is one, no problem except case <c>. 3380 * For <a> we will assume a NAT out there. 3381 * - if there are more than one, then we need to worry about scope P 3382 * or G. We should prefer G -> G and P -> P if possible. 3383 * Then as a secondary fall back to mixed types G->P being a last 3384 * ditch one. 3385 * - The above all works for bound all, but bound specific we need to 3386 * use the same concept but instead only consider the bound 3387 * addresses. If the bound set is NOT assigned to the interface then 3388 * we must use rotation amongst the bound addresses.. 3389 */ 3390 if (ro->ro_rt == NULL) { 3391 /* 3392 * Need a route to cache. 3393 */ 3394 SCTP_RTALLOC(ro, vrf_id); 3395 } 3396 if (ro->ro_rt == NULL) { 3397 return (NULL); 3398 } 3399 fam = ro->ro_dst.sa_family; 3400 dest_is_priv = dest_is_loop = 0; 3401 /* Setup our scopes for the destination */ 3402 switch (fam) { 3403#ifdef INET 3404 case AF_INET: 3405 /* Scope based on outbound address */ 3406 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3407 dest_is_loop = 1; 3408 if (net != NULL) { 3409 /* mark it as local */ 3410 net->addr_is_local = 1; 3411 } 3412 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) { 3413 dest_is_priv = 1; 3414 } 3415 break; 3416#endif 3417#ifdef INET6 3418 case AF_INET6: 3419 /* Scope based on outbound address */ 3420 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) || 3421 SCTP_ROUTE_IS_REAL_LOOP(ro)) { 3422 /* 3423 * If the address is a loopback address, which 3424 * consists of "::1" OR "fe80::1%lo0", we are 3425 * loopback scope. But we don't use dest_is_priv 3426 * (link local addresses). 3427 */ 3428 dest_is_loop = 1; 3429 if (net != NULL) { 3430 /* mark it as local */ 3431 net->addr_is_local = 1; 3432 } 3433 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3434 dest_is_priv = 1; 3435 } 3436 break; 3437#endif 3438 } 3439 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:"); 3440 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst); 3441 SCTP_IPI_ADDR_RLOCK(); 3442 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3443 /* 3444 * Bound all case 3445 */ 3446 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id, 3447 dest_is_priv, dest_is_loop, 3448 non_asoc_addr_ok, fam); 3449 SCTP_IPI_ADDR_RUNLOCK(); 3450 return (answer); 3451 } 3452 /* 3453 * Subset bound case 3454 */ 3455 if (stcb) { 3456 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro, 3457 vrf_id, dest_is_priv, 3458 dest_is_loop, 3459 non_asoc_addr_ok, fam); 3460 } else { 3461 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id, 3462 non_asoc_addr_ok, 3463 dest_is_priv, 3464 dest_is_loop, fam); 3465 } 3466 SCTP_IPI_ADDR_RUNLOCK(); 3467 return (answer); 3468} 3469 3470static int 3471sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize) 3472{ 3473 struct cmsghdr cmh; 3474 int tlen, at, found; 3475 struct sctp_sndinfo sndinfo; 3476 struct sctp_prinfo prinfo; 3477 struct sctp_authinfo authinfo; 3478 3479 tlen = SCTP_BUF_LEN(control); 3480 at = 0; 3481 found = 0; 3482 /* 3483 * Independent of how many mbufs, find the c_type inside the control 3484 * structure and copy out the data. 3485 */ 3486 while (at < tlen) { 3487 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3488 /* There is not enough room for one more. */ 3489 return (found); 3490 } 3491 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3492 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { 3493 /* We dont't have a complete CMSG header. */ 3494 return (found); 3495 } 3496 if (((int)cmh.cmsg_len + at) > tlen) { 3497 /* We don't have the complete CMSG. */ 3498 return (found); 3499 } 3500 if ((cmh.cmsg_level == IPPROTO_SCTP) && 3501 ((c_type == cmh.cmsg_type) || 3502 ((c_type == SCTP_SNDRCV) && 3503 ((cmh.cmsg_type == SCTP_SNDINFO) || 3504 (cmh.cmsg_type == SCTP_PRINFO) || 3505 (cmh.cmsg_type == SCTP_AUTHINFO))))) { 3506 if (c_type == cmh.cmsg_type) { 3507 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) { 3508 return (found); 3509 } 3510 /* It is exactly what we want. Copy it out. */ 3511 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data); 3512 return (1); 3513 } else { 3514 struct sctp_sndrcvinfo *sndrcvinfo; 3515 3516 sndrcvinfo = (struct sctp_sndrcvinfo *)data; 3517 if (found == 0) { 3518 if (cpsize < sizeof(struct sctp_sndrcvinfo)) { 3519 return (found); 3520 } 3521 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo)); 3522 } 3523 switch (cmh.cmsg_type) { 3524 case SCTP_SNDINFO: 3525 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) { 3526 return (found); 3527 } 3528 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo); 3529 sndrcvinfo->sinfo_stream = sndinfo.snd_sid; 3530 sndrcvinfo->sinfo_flags = sndinfo.snd_flags; 3531 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid; 3532 sndrcvinfo->sinfo_context = sndinfo.snd_context; 3533 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id; 3534 break; 3535 case SCTP_PRINFO: 3536 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) { 3537 return (found); 3538 } 3539 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo); 3540 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) { 3541 sndrcvinfo->sinfo_timetolive = prinfo.pr_value; 3542 } else { 3543 sndrcvinfo->sinfo_timetolive = 0; 3544 } 3545 sndrcvinfo->sinfo_flags |= prinfo.pr_policy; 3546 break; 3547 case SCTP_AUTHINFO: 3548 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) { 3549 return (found); 3550 } 3551 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo); 3552 sndrcvinfo->sinfo_keynumber_valid = 1; 3553 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber; 3554 break; 3555 default: 3556 return (found); 3557 } 3558 found = 1; 3559 } 3560 } 3561 at += CMSG_ALIGN(cmh.cmsg_len); 3562 } 3563 return (found); 3564} 3565 3566static int 3567sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error) 3568{ 3569 struct cmsghdr cmh; 3570 int tlen, at; 3571 struct sctp_initmsg initmsg; 3572 3573#ifdef INET 3574 struct sockaddr_in sin; 3575 3576#endif 3577#ifdef INET6 3578 struct sockaddr_in6 sin6; 3579 3580#endif 3581 3582 tlen = SCTP_BUF_LEN(control); 3583 at = 0; 3584 while (at < tlen) { 3585 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3586 /* There is not enough room for one more. */ 3587 *error = EINVAL; 3588 return (1); 3589 } 3590 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3591 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { 3592 /* We dont't have a complete CMSG header. */ 3593 *error = EINVAL; 3594 return (1); 3595 } 3596 if (((int)cmh.cmsg_len + at) > tlen) { 3597 /* We don't have the complete CMSG. */ 3598 *error = EINVAL; 3599 return (1); 3600 } 3601 if (cmh.cmsg_level == IPPROTO_SCTP) { 3602 switch (cmh.cmsg_type) { 3603 case SCTP_INIT: 3604 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) { 3605 *error = EINVAL; 3606 return (1); 3607 } 3608 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg); 3609 if (initmsg.sinit_max_attempts) 3610 stcb->asoc.max_init_times = initmsg.sinit_max_attempts; 3611 if (initmsg.sinit_num_ostreams) 3612 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams; 3613 if (initmsg.sinit_max_instreams) 3614 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams; 3615 if (initmsg.sinit_max_init_timeo) 3616 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo; 3617 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) { 3618 struct sctp_stream_out *tmp_str; 3619 unsigned int i; 3620 3621#if defined(SCTP_DETAILED_STR_STATS) 3622 int j; 3623 3624#endif 3625 3626 /* Default is NOT correct */ 3627 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n", 3628 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams); 3629 SCTP_TCB_UNLOCK(stcb); 3630 SCTP_MALLOC(tmp_str, 3631 struct sctp_stream_out *, 3632 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)), 3633 SCTP_M_STRMO); 3634 SCTP_TCB_LOCK(stcb); 3635 if (tmp_str != NULL) { 3636 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO); 3637 stcb->asoc.strmout = tmp_str; 3638 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams; 3639 } else { 3640 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt; 3641 } 3642 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 3643 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 3644 stcb->asoc.strmout[i].chunks_on_queues = 0; 3645 stcb->asoc.strmout[i].next_sequence_send = 0; 3646#if defined(SCTP_DETAILED_STR_STATS) 3647 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) { 3648 stcb->asoc.strmout[i].abandoned_sent[j] = 0; 3649 stcb->asoc.strmout[i].abandoned_unsent[j] = 0; 3650 } 3651#else 3652 stcb->asoc.strmout[i].abandoned_sent[0] = 0; 3653 stcb->asoc.strmout[i].abandoned_unsent[0] = 0; 3654#endif 3655 stcb->asoc.strmout[i].stream_no = i; 3656 stcb->asoc.strmout[i].last_msg_incomplete = 0; 3657 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL); 3658 } 3659 } 3660 break; 3661#ifdef INET 3662 case SCTP_DSTADDRV4: 3663 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) { 3664 *error = EINVAL; 3665 return (1); 3666 } 3667 memset(&sin, 0, sizeof(struct sockaddr_in)); 3668 sin.sin_family = AF_INET; 3669 sin.sin_len = sizeof(struct sockaddr_in); 3670 sin.sin_port = stcb->rport; 3671 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr); 3672 if ((sin.sin_addr.s_addr == INADDR_ANY) || 3673 (sin.sin_addr.s_addr == INADDR_BROADCAST) || 3674 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 3675 *error = EINVAL; 3676 return (1); 3677 } 3678 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, 3679 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3680 *error = ENOBUFS; 3681 return (1); 3682 } 3683 break; 3684#endif 3685#ifdef INET6 3686 case SCTP_DSTADDRV6: 3687 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) { 3688 *error = EINVAL; 3689 return (1); 3690 } 3691 memset(&sin6, 0, sizeof(struct sockaddr_in6)); 3692 sin6.sin6_family = AF_INET6; 3693 sin6.sin6_len = sizeof(struct sockaddr_in6); 3694 sin6.sin6_port = stcb->rport; 3695 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr); 3696 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) || 3697 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 3698 *error = EINVAL; 3699 return (1); 3700 } 3701#ifdef INET 3702 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) { 3703 in6_sin6_2_sin(&sin, &sin6); 3704 if ((sin.sin_addr.s_addr == INADDR_ANY) || 3705 (sin.sin_addr.s_addr == INADDR_BROADCAST) || 3706 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 3707 *error = EINVAL; 3708 return (1); 3709 } 3710 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, 3711 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3712 *error = ENOBUFS; 3713 return (1); 3714 } 3715 } else 3716#endif 3717 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, 3718 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3719 *error = ENOBUFS; 3720 return (1); 3721 } 3722 break; 3723#endif 3724 default: 3725 break; 3726 } 3727 } 3728 at += CMSG_ALIGN(cmh.cmsg_len); 3729 } 3730 return (0); 3731} 3732 3733static struct sctp_tcb * 3734sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p, 3735 uint16_t port, 3736 struct mbuf *control, 3737 struct sctp_nets **net_p, 3738 int *error) 3739{ 3740 struct cmsghdr cmh; 3741 int tlen, at; 3742 struct sctp_tcb *stcb; 3743 struct sockaddr *addr; 3744 3745#ifdef INET 3746 struct sockaddr_in sin; 3747 3748#endif 3749#ifdef INET6 3750 struct sockaddr_in6 sin6; 3751 3752#endif 3753 3754 tlen = SCTP_BUF_LEN(control); 3755 at = 0; 3756 while (at < tlen) { 3757 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3758 /* There is not enough room for one more. */ 3759 *error = EINVAL; 3760 return (NULL); 3761 } 3762 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3763 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { 3764 /* We dont't have a complete CMSG header. */ 3765 *error = EINVAL; 3766 return (NULL); 3767 } 3768 if (((int)cmh.cmsg_len + at) > tlen) { 3769 /* We don't have the complete CMSG. */ 3770 *error = EINVAL; 3771 return (NULL); 3772 } 3773 if (cmh.cmsg_level == IPPROTO_SCTP) { 3774 switch (cmh.cmsg_type) { 3775#ifdef INET 3776 case SCTP_DSTADDRV4: 3777 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) { 3778 *error = EINVAL; 3779 return (NULL); 3780 } 3781 memset(&sin, 0, sizeof(struct sockaddr_in)); 3782 sin.sin_family = AF_INET; 3783 sin.sin_len = sizeof(struct sockaddr_in); 3784 sin.sin_port = port; 3785 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr); 3786 addr = (struct sockaddr *)&sin; 3787 break; 3788#endif 3789#ifdef INET6 3790 case SCTP_DSTADDRV6: 3791 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) { 3792 *error = EINVAL; 3793 return (NULL); 3794 } 3795 memset(&sin6, 0, sizeof(struct sockaddr_in6)); 3796 sin6.sin6_family = AF_INET6; 3797 sin6.sin6_len = sizeof(struct sockaddr_in6); 3798 sin6.sin6_port = port; 3799 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr); 3800#ifdef INET 3801 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) { 3802 in6_sin6_2_sin(&sin, &sin6); 3803 addr = (struct sockaddr *)&sin; 3804 } else 3805#endif 3806 addr = (struct sockaddr *)&sin6; 3807 break; 3808#endif 3809 default: 3810 addr = NULL; 3811 break; 3812 } 3813 if (addr) { 3814 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL); 3815 if (stcb != NULL) { 3816 return (stcb); 3817 } 3818 } 3819 } 3820 at += CMSG_ALIGN(cmh.cmsg_len); 3821 } 3822 return (NULL); 3823} 3824 3825static struct mbuf * 3826sctp_add_cookie(struct mbuf *init, int init_offset, 3827 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature) 3828{ 3829 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret; 3830 struct sctp_state_cookie *stc; 3831 struct sctp_paramhdr *ph; 3832 uint8_t *foo; 3833 int sig_offset; 3834 uint16_t cookie_sz; 3835 3836 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) + 3837 sizeof(struct sctp_paramhdr)), 0, 3838 M_NOWAIT, 1, MT_DATA); 3839 if (mret == NULL) { 3840 return (NULL); 3841 } 3842 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT); 3843 if (copy_init == NULL) { 3844 sctp_m_freem(mret); 3845 return (NULL); 3846 } 3847#ifdef SCTP_MBUF_LOGGING 3848 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 3849 struct mbuf *mat; 3850 3851 for (mat = copy_init; mat; mat = SCTP_BUF_NEXT(mat)) { 3852 if (SCTP_BUF_IS_EXTENDED(mat)) { 3853 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 3854 } 3855 } 3856 } 3857#endif 3858 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL, 3859 M_NOWAIT); 3860 if (copy_initack == NULL) { 3861 sctp_m_freem(mret); 3862 sctp_m_freem(copy_init); 3863 return (NULL); 3864 } 3865#ifdef SCTP_MBUF_LOGGING 3866 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 3867 struct mbuf *mat; 3868 3869 for (mat = copy_initack; mat; mat = SCTP_BUF_NEXT(mat)) { 3870 if (SCTP_BUF_IS_EXTENDED(mat)) { 3871 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 3872 } 3873 } 3874 } 3875#endif 3876 /* easy side we just drop it on the end */ 3877 ph = mtod(mret, struct sctp_paramhdr *); 3878 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) + 3879 sizeof(struct sctp_paramhdr); 3880 stc = (struct sctp_state_cookie *)((caddr_t)ph + 3881 sizeof(struct sctp_paramhdr)); 3882 ph->param_type = htons(SCTP_STATE_COOKIE); 3883 ph->param_length = 0; /* fill in at the end */ 3884 /* Fill in the stc cookie data */ 3885 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie)); 3886 3887 /* tack the INIT and then the INIT-ACK onto the chain */ 3888 cookie_sz = 0; 3889 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3890 cookie_sz += SCTP_BUF_LEN(m_at); 3891 if (SCTP_BUF_NEXT(m_at) == NULL) { 3892 SCTP_BUF_NEXT(m_at) = copy_init; 3893 break; 3894 } 3895 } 3896 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3897 cookie_sz += SCTP_BUF_LEN(m_at); 3898 if (SCTP_BUF_NEXT(m_at) == NULL) { 3899 SCTP_BUF_NEXT(m_at) = copy_initack; 3900 break; 3901 } 3902 } 3903 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3904 cookie_sz += SCTP_BUF_LEN(m_at); 3905 if (SCTP_BUF_NEXT(m_at) == NULL) { 3906 break; 3907 } 3908 } 3909 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA); 3910 if (sig == NULL) { 3911 /* no space, so free the entire chain */ 3912 sctp_m_freem(mret); 3913 return (NULL); 3914 } 3915 SCTP_BUF_LEN(sig) = 0; 3916 SCTP_BUF_NEXT(m_at) = sig; 3917 sig_offset = 0; 3918 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset); 3919 memset(foo, 0, SCTP_SIGNATURE_SIZE); 3920 *signature = foo; 3921 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE; 3922 cookie_sz += SCTP_SIGNATURE_SIZE; 3923 ph->param_length = htons(cookie_sz); 3924 return (mret); 3925} 3926 3927 3928static uint8_t 3929sctp_get_ect(struct sctp_tcb *stcb) 3930{ 3931 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) { 3932 return (SCTP_ECT0_BIT); 3933 } else { 3934 return (0); 3935 } 3936} 3937 3938#if defined(INET) || defined(INET6) 3939static void 3940sctp_handle_no_route(struct sctp_tcb *stcb, 3941 struct sctp_nets *net, 3942 int so_locked) 3943{ 3944 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n"); 3945 3946 if (net) { 3947 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was "); 3948 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa); 3949 if (net->dest_state & SCTP_ADDR_CONFIRMED) { 3950 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) { 3951 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net); 3952 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 3953 stcb, 0, 3954 (void *)net, 3955 so_locked); 3956 net->dest_state &= ~SCTP_ADDR_REACHABLE; 3957 net->dest_state &= ~SCTP_ADDR_PF; 3958 } 3959 } 3960 if (stcb) { 3961 if (net == stcb->asoc.primary_destination) { 3962 /* need a new primary */ 3963 struct sctp_nets *alt; 3964 3965 alt = sctp_find_alternate_net(stcb, net, 0); 3966 if (alt != net) { 3967 if (stcb->asoc.alternate) { 3968 sctp_free_remote_addr(stcb->asoc.alternate); 3969 } 3970 stcb->asoc.alternate = alt; 3971 atomic_add_int(&stcb->asoc.alternate->ref_count, 1); 3972 if (net->ro._s_addr) { 3973 sctp_free_ifa(net->ro._s_addr); 3974 net->ro._s_addr = NULL; 3975 } 3976 net->src_addr_selected = 0; 3977 } 3978 } 3979 } 3980 } 3981} 3982 3983#endif 3984 3985static int 3986sctp_lowlevel_chunk_output(struct sctp_inpcb *inp, 3987 struct sctp_tcb *stcb, /* may be NULL */ 3988 struct sctp_nets *net, 3989 struct sockaddr *to, 3990 struct mbuf *m, 3991 uint32_t auth_offset, 3992 struct sctp_auth_chunk *auth, 3993 uint16_t auth_keyid, 3994 int nofragment_flag, 3995 int ecn_ok, 3996 int out_of_asoc_ok, 3997 uint16_t src_port, 3998 uint16_t dest_port, 3999 uint32_t v_tag, 4000 uint16_t port, 4001 union sctp_sockstore *over_addr, 4002 uint8_t use_mflowid, uint32_t mflowid, 4003#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 4004 int so_locked SCTP_UNUSED 4005#else 4006 int so_locked 4007#endif 4008) 4009/* nofragment_flag to tell if IP_DF should be set (IPv4 only) */ 4010{ 4011 /** 4012 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header 4013 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure: 4014 * - fill in the HMAC digest of any AUTH chunk in the packet. 4015 * - calculate and fill in the SCTP checksum. 4016 * - prepend an IP address header. 4017 * - if boundall use INADDR_ANY. 4018 * - if boundspecific do source address selection. 4019 * - set fragmentation option for ipV4. 4020 * - On return from IP output, check/adjust mtu size of output 4021 * interface and smallest_mtu size as well. 4022 */ 4023 /* Will need ifdefs around this */ 4024 struct mbuf *newm; 4025 struct sctphdr *sctphdr; 4026 int packet_length; 4027 int ret; 4028 4029#if defined(INET) || defined(INET6) 4030 uint32_t vrf_id; 4031 4032#endif 4033#if defined(INET) || defined(INET6) 4034 struct mbuf *o_pak; 4035 sctp_route_t *ro = NULL; 4036 struct udphdr *udp = NULL; 4037 4038#endif 4039 uint8_t tos_value; 4040 4041#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4042 struct socket *so = NULL; 4043 4044#endif 4045 4046 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) { 4047 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 4048 sctp_m_freem(m); 4049 return (EFAULT); 4050 } 4051#if defined(INET) || defined(INET6) 4052 if (stcb) { 4053 vrf_id = stcb->asoc.vrf_id; 4054 } else { 4055 vrf_id = inp->def_vrf_id; 4056 } 4057#endif 4058 /* fill in the HMAC digest for any AUTH chunk in the packet */ 4059 if ((auth != NULL) && (stcb != NULL)) { 4060 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid); 4061 } 4062 if (net) { 4063 tos_value = net->dscp; 4064 } else if (stcb) { 4065 tos_value = stcb->asoc.default_dscp; 4066 } else { 4067 tos_value = inp->sctp_ep.default_dscp; 4068 } 4069 4070 switch (to->sa_family) { 4071#ifdef INET 4072 case AF_INET: 4073 { 4074 struct ip *ip = NULL; 4075 sctp_route_t iproute; 4076 int len; 4077 4078 len = sizeof(struct ip) + sizeof(struct sctphdr); 4079 if (port) { 4080 len += sizeof(struct udphdr); 4081 } 4082 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA); 4083 if (newm == NULL) { 4084 sctp_m_freem(m); 4085 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4086 return (ENOMEM); 4087 } 4088 SCTP_ALIGN_TO_END(newm, len); 4089 SCTP_BUF_LEN(newm) = len; 4090 SCTP_BUF_NEXT(newm) = m; 4091 m = newm; 4092 if (net != NULL) { 4093#ifdef INVARIANTS 4094 if (net->flowidset == 0) { 4095 panic("Flow ID not set"); 4096 } 4097#endif 4098 m->m_pkthdr.flowid = net->flowid; 4099 m->m_flags |= M_FLOWID; 4100 } else { 4101 if (use_mflowid != 0) { 4102 m->m_pkthdr.flowid = mflowid; 4103 m->m_flags |= M_FLOWID; 4104 } 4105 } 4106 packet_length = sctp_calculate_len(m); 4107 ip = mtod(m, struct ip *); 4108 ip->ip_v = IPVERSION; 4109 ip->ip_hl = (sizeof(struct ip) >> 2); 4110 if (tos_value == 0) { 4111 /* 4112 * This means especially, that it is not set 4113 * at the SCTP layer. So use the value from 4114 * the IP layer. 4115 */ 4116 tos_value = inp->ip_inp.inp.inp_ip_tos; 4117 } 4118 tos_value &= 0xfc; 4119 if (ecn_ok) { 4120 tos_value |= sctp_get_ect(stcb); 4121 } 4122 if ((nofragment_flag) && (port == 0)) { 4123 ip->ip_off = htons(IP_DF); 4124 } else { 4125 ip->ip_off = htons(0); 4126 } 4127 /* FreeBSD has a function for ip_id's */ 4128 ip->ip_id = ip_newid(); 4129 4130 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl; 4131 ip->ip_len = htons(packet_length); 4132 ip->ip_tos = tos_value; 4133 if (port) { 4134 ip->ip_p = IPPROTO_UDP; 4135 } else { 4136 ip->ip_p = IPPROTO_SCTP; 4137 } 4138 ip->ip_sum = 0; 4139 if (net == NULL) { 4140 ro = &iproute; 4141 memset(&iproute, 0, sizeof(iproute)); 4142 memcpy(&ro->ro_dst, to, to->sa_len); 4143 } else { 4144 ro = (sctp_route_t *) & net->ro; 4145 } 4146 /* Now the address selection part */ 4147 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr; 4148 4149 /* call the routine to select the src address */ 4150 if (net && out_of_asoc_ok == 0) { 4151 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) { 4152 sctp_free_ifa(net->ro._s_addr); 4153 net->ro._s_addr = NULL; 4154 net->src_addr_selected = 0; 4155 if (ro->ro_rt) { 4156 RTFREE(ro->ro_rt); 4157 ro->ro_rt = NULL; 4158 } 4159 } 4160 if (net->src_addr_selected == 0) { 4161 /* Cache the source address */ 4162 net->ro._s_addr = sctp_source_address_selection(inp, stcb, 4163 ro, net, 0, 4164 vrf_id); 4165 net->src_addr_selected = 1; 4166 } 4167 if (net->ro._s_addr == NULL) { 4168 /* No route to host */ 4169 net->src_addr_selected = 0; 4170 sctp_handle_no_route(stcb, net, so_locked); 4171 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4172 sctp_m_freem(m); 4173 return (EHOSTUNREACH); 4174 } 4175 ip->ip_src = net->ro._s_addr->address.sin.sin_addr; 4176 } else { 4177 if (over_addr == NULL) { 4178 struct sctp_ifa *_lsrc; 4179 4180 _lsrc = sctp_source_address_selection(inp, stcb, ro, 4181 net, 4182 out_of_asoc_ok, 4183 vrf_id); 4184 if (_lsrc == NULL) { 4185 sctp_handle_no_route(stcb, net, so_locked); 4186 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4187 sctp_m_freem(m); 4188 return (EHOSTUNREACH); 4189 } 4190 ip->ip_src = _lsrc->address.sin.sin_addr; 4191 sctp_free_ifa(_lsrc); 4192 } else { 4193 ip->ip_src = over_addr->sin.sin_addr; 4194 SCTP_RTALLOC(ro, vrf_id); 4195 } 4196 } 4197 if (port) { 4198 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 4199 sctp_handle_no_route(stcb, net, so_locked); 4200 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4201 sctp_m_freem(m); 4202 return (EHOSTUNREACH); 4203 } 4204 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip)); 4205 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4206 udp->uh_dport = port; 4207 udp->uh_ulen = htons(packet_length - sizeof(struct ip)); 4208 if (V_udp_cksum) { 4209 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 4210 } else { 4211 udp->uh_sum = 0; 4212 } 4213 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); 4214 } else { 4215 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip)); 4216 } 4217 4218 sctphdr->src_port = src_port; 4219 sctphdr->dest_port = dest_port; 4220 sctphdr->v_tag = v_tag; 4221 sctphdr->checksum = 0; 4222 4223 /* 4224 * If source address selection fails and we find no 4225 * route then the ip_output should fail as well with 4226 * a NO_ROUTE_TO_HOST type error. We probably should 4227 * catch that somewhere and abort the association 4228 * right away (assuming this is an INIT being sent). 4229 */ 4230 if (ro->ro_rt == NULL) { 4231 /* 4232 * src addr selection failed to find a route 4233 * (or valid source addr), so we can't get 4234 * there from here (yet)! 4235 */ 4236 sctp_handle_no_route(stcb, net, so_locked); 4237 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4238 sctp_m_freem(m); 4239 return (EHOSTUNREACH); 4240 } 4241 if (ro != &iproute) { 4242 memcpy(&iproute, ro, sizeof(*ro)); 4243 } 4244 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n", 4245 (uint32_t) (ntohl(ip->ip_src.s_addr))); 4246 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n", 4247 (uint32_t) (ntohl(ip->ip_dst.s_addr))); 4248 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n", 4249 (void *)ro->ro_rt); 4250 4251 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 4252 /* failed to prepend data, give up */ 4253 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4254 sctp_m_freem(m); 4255 return (ENOMEM); 4256 } 4257 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 4258 if (port) { 4259#if defined(SCTP_WITH_NO_CSUM) 4260 SCTP_STAT_INCR(sctps_sendnocrc); 4261#else 4262 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr)); 4263 SCTP_STAT_INCR(sctps_sendswcrc); 4264#endif 4265 if (V_udp_cksum) { 4266 SCTP_ENABLE_UDP_CSUM(o_pak); 4267 } 4268 } else { 4269#if defined(SCTP_WITH_NO_CSUM) 4270 SCTP_STAT_INCR(sctps_sendnocrc); 4271#else 4272 m->m_pkthdr.csum_flags = CSUM_SCTP; 4273 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 4274 SCTP_STAT_INCR(sctps_sendhwcrc); 4275#endif 4276 } 4277#ifdef SCTP_PACKET_LOGGING 4278 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 4279 sctp_packet_log(o_pak); 4280#endif 4281 /* send it out. table id is taken from stcb */ 4282#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4283 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4284 so = SCTP_INP_SO(inp); 4285 SCTP_SOCKET_UNLOCK(so, 0); 4286 } 4287#endif 4288 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id); 4289#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4290 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4291 atomic_add_int(&stcb->asoc.refcnt, 1); 4292 SCTP_TCB_UNLOCK(stcb); 4293 SCTP_SOCKET_LOCK(so, 0); 4294 SCTP_TCB_LOCK(stcb); 4295 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4296 } 4297#endif 4298 SCTP_STAT_INCR(sctps_sendpackets); 4299 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 4300 if (ret) 4301 SCTP_STAT_INCR(sctps_senderrors); 4302 4303 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret); 4304 if (net == NULL) { 4305 /* free tempy routes */ 4306 RO_RTFREE(ro); 4307 } else { 4308 /* 4309 * PMTU check versus smallest asoc MTU goes 4310 * here 4311 */ 4312 if ((ro->ro_rt != NULL) && 4313 (net->ro._s_addr)) { 4314 uint32_t mtu; 4315 4316 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); 4317 if (net->port) { 4318 mtu -= sizeof(struct udphdr); 4319 } 4320 if (mtu && (stcb->asoc.smallest_mtu > mtu)) { 4321 sctp_mtu_size_reset(inp, &stcb->asoc, mtu); 4322 net->mtu = mtu; 4323 } 4324 } else if (ro->ro_rt == NULL) { 4325 /* route was freed */ 4326 if (net->ro._s_addr && 4327 net->src_addr_selected) { 4328 sctp_free_ifa(net->ro._s_addr); 4329 net->ro._s_addr = NULL; 4330 } 4331 net->src_addr_selected = 0; 4332 } 4333 } 4334 return (ret); 4335 } 4336#endif 4337#ifdef INET6 4338 case AF_INET6: 4339 { 4340 uint32_t flowlabel, flowinfo; 4341 struct ip6_hdr *ip6h; 4342 struct route_in6 ip6route; 4343 struct ifnet *ifp; 4344 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp; 4345 int prev_scope = 0; 4346 struct sockaddr_in6 lsa6_storage; 4347 int error; 4348 u_short prev_port = 0; 4349 int len; 4350 4351 if (net) { 4352 flowlabel = net->flowlabel; 4353 } else if (stcb) { 4354 flowlabel = stcb->asoc.default_flowlabel; 4355 } else { 4356 flowlabel = inp->sctp_ep.default_flowlabel; 4357 } 4358 if (flowlabel == 0) { 4359 /* 4360 * This means especially, that it is not set 4361 * at the SCTP layer. So use the value from 4362 * the IP layer. 4363 */ 4364 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo); 4365 } 4366 flowlabel &= 0x000fffff; 4367 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr); 4368 if (port) { 4369 len += sizeof(struct udphdr); 4370 } 4371 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA); 4372 if (newm == NULL) { 4373 sctp_m_freem(m); 4374 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4375 return (ENOMEM); 4376 } 4377 SCTP_ALIGN_TO_END(newm, len); 4378 SCTP_BUF_LEN(newm) = len; 4379 SCTP_BUF_NEXT(newm) = m; 4380 m = newm; 4381 if (net != NULL) { 4382#ifdef INVARIANTS 4383 if (net->flowidset == 0) { 4384 panic("Flow ID not set"); 4385 } 4386#endif 4387 m->m_pkthdr.flowid = net->flowid; 4388 m->m_flags |= M_FLOWID; 4389 } else { 4390 if (use_mflowid != 0) { 4391 m->m_pkthdr.flowid = mflowid; 4392 m->m_flags |= M_FLOWID; 4393 } 4394 } 4395 packet_length = sctp_calculate_len(m); 4396 4397 ip6h = mtod(m, struct ip6_hdr *); 4398 /* protect *sin6 from overwrite */ 4399 sin6 = (struct sockaddr_in6 *)to; 4400 tmp = *sin6; 4401 sin6 = &tmp; 4402 4403 /* KAME hack: embed scopeid */ 4404 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4405 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4406 return (EINVAL); 4407 } 4408 if (net == NULL) { 4409 memset(&ip6route, 0, sizeof(ip6route)); 4410 ro = (sctp_route_t *) & ip6route; 4411 memcpy(&ro->ro_dst, sin6, sin6->sin6_len); 4412 } else { 4413 ro = (sctp_route_t *) & net->ro; 4414 } 4415 /* 4416 * We assume here that inp_flow is in host byte 4417 * order within the TCB! 4418 */ 4419 if (tos_value == 0) { 4420 /* 4421 * This means especially, that it is not set 4422 * at the SCTP layer. So use the value from 4423 * the IP layer. 4424 */ 4425 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff; 4426 } 4427 tos_value &= 0xfc; 4428 if (ecn_ok) { 4429 tos_value |= sctp_get_ect(stcb); 4430 } 4431 flowinfo = 0x06; 4432 flowinfo <<= 8; 4433 flowinfo |= tos_value; 4434 flowinfo <<= 20; 4435 flowinfo |= flowlabel; 4436 ip6h->ip6_flow = htonl(flowinfo); 4437 if (port) { 4438 ip6h->ip6_nxt = IPPROTO_UDP; 4439 } else { 4440 ip6h->ip6_nxt = IPPROTO_SCTP; 4441 } 4442 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr)); 4443 ip6h->ip6_dst = sin6->sin6_addr; 4444 4445 /* 4446 * Add SRC address selection here: we can only reuse 4447 * to a limited degree the kame src-addr-sel, since 4448 * we can try their selection but it may not be 4449 * bound. 4450 */ 4451 bzero(&lsa6_tmp, sizeof(lsa6_tmp)); 4452 lsa6_tmp.sin6_family = AF_INET6; 4453 lsa6_tmp.sin6_len = sizeof(lsa6_tmp); 4454 lsa6 = &lsa6_tmp; 4455 if (net && out_of_asoc_ok == 0) { 4456 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) { 4457 sctp_free_ifa(net->ro._s_addr); 4458 net->ro._s_addr = NULL; 4459 net->src_addr_selected = 0; 4460 if (ro->ro_rt) { 4461 RTFREE(ro->ro_rt); 4462 ro->ro_rt = NULL; 4463 } 4464 } 4465 if (net->src_addr_selected == 0) { 4466 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4467 /* KAME hack: embed scopeid */ 4468 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4469 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4470 return (EINVAL); 4471 } 4472 /* Cache the source address */ 4473 net->ro._s_addr = sctp_source_address_selection(inp, 4474 stcb, 4475 ro, 4476 net, 4477 0, 4478 vrf_id); 4479 (void)sa6_recoverscope(sin6); 4480 net->src_addr_selected = 1; 4481 } 4482 if (net->ro._s_addr == NULL) { 4483 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n"); 4484 net->src_addr_selected = 0; 4485 sctp_handle_no_route(stcb, net, so_locked); 4486 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4487 sctp_m_freem(m); 4488 return (EHOSTUNREACH); 4489 } 4490 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr; 4491 } else { 4492 sin6 = (struct sockaddr_in6 *)&ro->ro_dst; 4493 /* KAME hack: embed scopeid */ 4494 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4495 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4496 return (EINVAL); 4497 } 4498 if (over_addr == NULL) { 4499 struct sctp_ifa *_lsrc; 4500 4501 _lsrc = sctp_source_address_selection(inp, stcb, ro, 4502 net, 4503 out_of_asoc_ok, 4504 vrf_id); 4505 if (_lsrc == NULL) { 4506 sctp_handle_no_route(stcb, net, so_locked); 4507 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4508 sctp_m_freem(m); 4509 return (EHOSTUNREACH); 4510 } 4511 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr; 4512 sctp_free_ifa(_lsrc); 4513 } else { 4514 lsa6->sin6_addr = over_addr->sin6.sin6_addr; 4515 SCTP_RTALLOC(ro, vrf_id); 4516 } 4517 (void)sa6_recoverscope(sin6); 4518 } 4519 lsa6->sin6_port = inp->sctp_lport; 4520 4521 if (ro->ro_rt == NULL) { 4522 /* 4523 * src addr selection failed to find a route 4524 * (or valid source addr), so we can't get 4525 * there from here! 4526 */ 4527 sctp_handle_no_route(stcb, net, so_locked); 4528 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4529 sctp_m_freem(m); 4530 return (EHOSTUNREACH); 4531 } 4532 /* 4533 * XXX: sa6 may not have a valid sin6_scope_id in 4534 * the non-SCOPEDROUTING case. 4535 */ 4536 bzero(&lsa6_storage, sizeof(lsa6_storage)); 4537 lsa6_storage.sin6_family = AF_INET6; 4538 lsa6_storage.sin6_len = sizeof(lsa6_storage); 4539 lsa6_storage.sin6_addr = lsa6->sin6_addr; 4540 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) { 4541 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error); 4542 sctp_m_freem(m); 4543 return (error); 4544 } 4545 /* XXX */ 4546 lsa6_storage.sin6_addr = lsa6->sin6_addr; 4547 lsa6_storage.sin6_port = inp->sctp_lport; 4548 lsa6 = &lsa6_storage; 4549 ip6h->ip6_src = lsa6->sin6_addr; 4550 4551 if (port) { 4552 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 4553 sctp_handle_no_route(stcb, net, so_locked); 4554 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4555 sctp_m_freem(m); 4556 return (EHOSTUNREACH); 4557 } 4558 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); 4559 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4560 udp->uh_dport = port; 4561 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr)); 4562 udp->uh_sum = 0; 4563 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); 4564 } else { 4565 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); 4566 } 4567 4568 sctphdr->src_port = src_port; 4569 sctphdr->dest_port = dest_port; 4570 sctphdr->v_tag = v_tag; 4571 sctphdr->checksum = 0; 4572 4573 /* 4574 * We set the hop limit now since there is a good 4575 * chance that our ro pointer is now filled 4576 */ 4577 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro); 4578 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 4579 4580#ifdef SCTP_DEBUG 4581 /* Copy to be sure something bad is not happening */ 4582 sin6->sin6_addr = ip6h->ip6_dst; 4583 lsa6->sin6_addr = ip6h->ip6_src; 4584#endif 4585 4586 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n"); 4587 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: "); 4588 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6); 4589 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: "); 4590 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6); 4591 if (net) { 4592 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4593 /* 4594 * preserve the port and scope for link 4595 * local send 4596 */ 4597 prev_scope = sin6->sin6_scope_id; 4598 prev_port = sin6->sin6_port; 4599 } 4600 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 4601 /* failed to prepend data, give up */ 4602 sctp_m_freem(m); 4603 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4604 return (ENOMEM); 4605 } 4606 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 4607 if (port) { 4608#if defined(SCTP_WITH_NO_CSUM) 4609 SCTP_STAT_INCR(sctps_sendnocrc); 4610#else 4611 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 4612 SCTP_STAT_INCR(sctps_sendswcrc); 4613#endif 4614 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) { 4615 udp->uh_sum = 0xffff; 4616 } 4617 } else { 4618#if defined(SCTP_WITH_NO_CSUM) 4619 SCTP_STAT_INCR(sctps_sendnocrc); 4620#else 4621 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6; 4622 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 4623 SCTP_STAT_INCR(sctps_sendhwcrc); 4624#endif 4625 } 4626 /* send it out. table id is taken from stcb */ 4627#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4628 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4629 so = SCTP_INP_SO(inp); 4630 SCTP_SOCKET_UNLOCK(so, 0); 4631 } 4632#endif 4633#ifdef SCTP_PACKET_LOGGING 4634 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 4635 sctp_packet_log(o_pak); 4636#endif 4637 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id); 4638#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4639 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4640 atomic_add_int(&stcb->asoc.refcnt, 1); 4641 SCTP_TCB_UNLOCK(stcb); 4642 SCTP_SOCKET_LOCK(so, 0); 4643 SCTP_TCB_LOCK(stcb); 4644 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4645 } 4646#endif 4647 if (net) { 4648 /* for link local this must be done */ 4649 sin6->sin6_scope_id = prev_scope; 4650 sin6->sin6_port = prev_port; 4651 } 4652 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret); 4653 SCTP_STAT_INCR(sctps_sendpackets); 4654 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 4655 if (ret) { 4656 SCTP_STAT_INCR(sctps_senderrors); 4657 } 4658 if (net == NULL) { 4659 /* Now if we had a temp route free it */ 4660 RO_RTFREE(ro); 4661 } else { 4662 /* 4663 * PMTU check versus smallest asoc MTU goes 4664 * here 4665 */ 4666 if (ro->ro_rt == NULL) { 4667 /* Route was freed */ 4668 if (net->ro._s_addr && 4669 net->src_addr_selected) { 4670 sctp_free_ifa(net->ro._s_addr); 4671 net->ro._s_addr = NULL; 4672 } 4673 net->src_addr_selected = 0; 4674 } 4675 if ((ro->ro_rt != NULL) && 4676 (net->ro._s_addr)) { 4677 uint32_t mtu; 4678 4679 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); 4680 if (mtu && 4681 (stcb->asoc.smallest_mtu > mtu)) { 4682 sctp_mtu_size_reset(inp, &stcb->asoc, mtu); 4683 net->mtu = mtu; 4684 if (net->port) { 4685 net->mtu -= sizeof(struct udphdr); 4686 } 4687 } 4688 } else if (ifp) { 4689 if (ND_IFINFO(ifp)->linkmtu && 4690 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) { 4691 sctp_mtu_size_reset(inp, 4692 &stcb->asoc, 4693 ND_IFINFO(ifp)->linkmtu); 4694 } 4695 } 4696 } 4697 return (ret); 4698 } 4699#endif 4700 default: 4701 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n", 4702 ((struct sockaddr *)to)->sa_family); 4703 sctp_m_freem(m); 4704 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 4705 return (EFAULT); 4706 } 4707} 4708 4709 4710void 4711sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked 4712#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 4713 SCTP_UNUSED 4714#endif 4715) 4716{ 4717 struct mbuf *m, *m_last; 4718 struct sctp_nets *net; 4719 struct sctp_init_chunk *init; 4720 struct sctp_supported_addr_param *sup_addr; 4721 struct sctp_adaptation_layer_indication *ali; 4722 struct sctp_supported_chunk_types_param *pr_supported; 4723 struct sctp_paramhdr *ph; 4724 int cnt_inits_to = 0; 4725 int ret; 4726 uint16_t num_ext, chunk_len, padding_len, parameter_len; 4727 4728 /* INIT's always go to the primary (and usually ONLY address) */ 4729 net = stcb->asoc.primary_destination; 4730 if (net == NULL) { 4731 net = TAILQ_FIRST(&stcb->asoc.nets); 4732 if (net == NULL) { 4733 /* TSNH */ 4734 return; 4735 } 4736 /* we confirm any address we send an INIT to */ 4737 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 4738 (void)sctp_set_primary_addr(stcb, NULL, net); 4739 } else { 4740 /* we confirm any address we send an INIT to */ 4741 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 4742 } 4743 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n"); 4744#ifdef INET6 4745 if (net->ro._l_addr.sa.sa_family == AF_INET6) { 4746 /* 4747 * special hook, if we are sending to link local it will not 4748 * show up in our private address count. 4749 */ 4750 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr)) 4751 cnt_inits_to = 1; 4752 } 4753#endif 4754 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 4755 /* This case should not happen */ 4756 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n"); 4757 return; 4758 } 4759 /* start the INIT timer */ 4760 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net); 4761 4762 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA); 4763 if (m == NULL) { 4764 /* No memory, INIT timer will re-attempt. */ 4765 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n"); 4766 return; 4767 } 4768 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk); 4769 padding_len = 0; 4770 /* Now lets put the chunk header in place */ 4771 init = mtod(m, struct sctp_init_chunk *); 4772 /* now the chunk header */ 4773 init->ch.chunk_type = SCTP_INITIATION; 4774 init->ch.chunk_flags = 0; 4775 /* fill in later from mbuf we build */ 4776 init->ch.chunk_length = 0; 4777 /* place in my tag */ 4778 init->init.initiate_tag = htonl(stcb->asoc.my_vtag); 4779 /* set up some of the credits. */ 4780 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0, 4781 SCTP_MINIMAL_RWND)); 4782 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams); 4783 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams); 4784 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number); 4785 4786 /* Adaptation layer indication parameter */ 4787 if (inp->sctp_ep.adaptation_layer_indicator_provided) { 4788 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication); 4789 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len); 4790 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 4791 ali->ph.param_length = htons(parameter_len); 4792 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator); 4793 chunk_len += parameter_len; 4794 } 4795 /* ECN parameter */ 4796 if (stcb->asoc.ecn_supported == 1) { 4797 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4798 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4799 ph->param_type = htons(SCTP_ECN_CAPABLE); 4800 ph->param_length = htons(parameter_len); 4801 chunk_len += parameter_len; 4802 } 4803 /* PR-SCTP supported parameter */ 4804 if (stcb->asoc.prsctp_supported == 1) { 4805 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4806 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4807 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED); 4808 ph->param_length = htons(parameter_len); 4809 chunk_len += parameter_len; 4810 } 4811 /* Add NAT friendly parameter. */ 4812 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) { 4813 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4814 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4815 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); 4816 ph->param_length = htons(parameter_len); 4817 chunk_len += parameter_len; 4818 } 4819 /* And now tell the peer which extensions we support */ 4820 num_ext = 0; 4821 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len); 4822 if (stcb->asoc.prsctp_supported == 1) { 4823 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 4824 } 4825 if (stcb->asoc.auth_supported == 1) { 4826 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 4827 } 4828 if (stcb->asoc.asconf_supported == 1) { 4829 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 4830 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 4831 } 4832 if (stcb->asoc.reconfig_supported == 1) { 4833 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 4834 } 4835 if (stcb->asoc.nrsack_supported == 1) { 4836 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; 4837 } 4838 if (stcb->asoc.pktdrop_supported == 1) { 4839 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 4840 } 4841 if (num_ext > 0) { 4842 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext; 4843 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 4844 pr_supported->ph.param_length = htons(parameter_len); 4845 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4846 chunk_len += parameter_len; 4847 } 4848 /* add authentication parameters */ 4849 if (stcb->asoc.auth_supported) { 4850 /* attach RANDOM parameter, if available */ 4851 if (stcb->asoc.authinfo.random != NULL) { 4852 struct sctp_auth_random *randp; 4853 4854 if (padding_len > 0) { 4855 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4856 chunk_len += padding_len; 4857 padding_len = 0; 4858 } 4859 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len); 4860 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len; 4861 /* random key already contains the header */ 4862 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len); 4863 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4864 chunk_len += parameter_len; 4865 } 4866 /* add HMAC_ALGO parameter */ 4867 if (stcb->asoc.local_hmacs != NULL) { 4868 struct sctp_auth_hmac_algo *hmacs; 4869 4870 if (padding_len > 0) { 4871 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4872 chunk_len += padding_len; 4873 padding_len = 0; 4874 } 4875 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len); 4876 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) + 4877 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t)); 4878 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 4879 hmacs->ph.param_length = htons(parameter_len); 4880 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids); 4881 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4882 chunk_len += parameter_len; 4883 } 4884 /* add CHUNKS parameter */ 4885 if (stcb->asoc.local_auth_chunks != NULL) { 4886 struct sctp_auth_chunk_list *chunks; 4887 4888 if (padding_len > 0) { 4889 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4890 chunk_len += padding_len; 4891 padding_len = 0; 4892 } 4893 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len); 4894 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) + 4895 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks)); 4896 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 4897 chunks->ph.param_length = htons(parameter_len); 4898 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types); 4899 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4900 chunk_len += parameter_len; 4901 } 4902 } 4903 /* now any cookie time extensions */ 4904 if (stcb->asoc.cookie_preserve_req) { 4905 struct sctp_cookie_perserve_param *cookie_preserve; 4906 4907 if (padding_len > 0) { 4908 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4909 chunk_len += padding_len; 4910 padding_len = 0; 4911 } 4912 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param); 4913 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len); 4914 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE); 4915 cookie_preserve->ph.param_length = htons(parameter_len); 4916 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req); 4917 stcb->asoc.cookie_preserve_req = 0; 4918 chunk_len += parameter_len; 4919 } 4920 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) { 4921 uint8_t i; 4922 4923 if (padding_len > 0) { 4924 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4925 chunk_len += padding_len; 4926 padding_len = 0; 4927 } 4928 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4929 if (stcb->asoc.scope.ipv4_addr_legal) { 4930 parameter_len += (uint16_t) sizeof(uint16_t); 4931 } 4932 if (stcb->asoc.scope.ipv6_addr_legal) { 4933 parameter_len += (uint16_t) sizeof(uint16_t); 4934 } 4935 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len); 4936 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE); 4937 sup_addr->ph.param_length = htons(parameter_len); 4938 i = 0; 4939 if (stcb->asoc.scope.ipv4_addr_legal) { 4940 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS); 4941 } 4942 if (stcb->asoc.scope.ipv6_addr_legal) { 4943 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS); 4944 } 4945 padding_len = 4 - 2 * i; 4946 chunk_len += parameter_len; 4947 } 4948 SCTP_BUF_LEN(m) = chunk_len; 4949 /* now the addresses */ 4950 /* 4951 * To optimize this we could put the scoping stuff into a structure 4952 * and remove the individual uint8's from the assoc structure. Then 4953 * we could just sifa in the address within the stcb. But for now 4954 * this is a quick hack to get the address stuff teased apart. 4955 */ 4956 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope, 4957 m, cnt_inits_to, 4958 &padding_len, &chunk_len); 4959 4960 init->ch.chunk_length = htons(chunk_len); 4961 if (padding_len > 0) { 4962 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 4963 sctp_m_freem(m); 4964 return; 4965 } 4966 } 4967 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n"); 4968 ret = sctp_lowlevel_chunk_output(inp, stcb, net, 4969 (struct sockaddr *)&net->ro._l_addr, 4970 m, 0, NULL, 0, 0, 0, 0, 4971 inp->sctp_lport, stcb->rport, htonl(0), 4972 net->port, NULL, 4973 0, 0, 4974 so_locked); 4975 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret); 4976 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 4977 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 4978} 4979 4980struct mbuf * 4981sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt, 4982 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly) 4983{ 4984 /* 4985 * Given a mbuf containing an INIT or INIT-ACK with the param_offset 4986 * being equal to the beginning of the params i.e. (iphlen + 4987 * sizeof(struct sctp_init_msg) parse through the parameters to the 4988 * end of the mbuf verifying that all parameters are known. 4989 * 4990 * For unknown parameters build and return a mbuf with 4991 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop 4992 * processing this chunk stop, and set *abort_processing to 1. 4993 * 4994 * By having param_offset be pre-set to where parameters begin it is 4995 * hoped that this routine may be reused in the future by new 4996 * features. 4997 */ 4998 struct sctp_paramhdr *phdr, params; 4999 5000 struct mbuf *mat, *op_err; 5001 char tempbuf[SCTP_PARAM_BUFFER_SIZE]; 5002 int at, limit, pad_needed; 5003 uint16_t ptype, plen, padded_size; 5004 int err_at; 5005 5006 *abort_processing = 0; 5007 mat = in_initpkt; 5008 err_at = 0; 5009 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk); 5010 at = param_offset; 5011 op_err = NULL; 5012 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n"); 5013 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 5014 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) { 5015 ptype = ntohs(phdr->param_type); 5016 plen = ntohs(phdr->param_length); 5017 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) { 5018 /* wacked parameter */ 5019 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen); 5020 goto invalid_size; 5021 } 5022 limit -= SCTP_SIZE32(plen); 5023 /*- 5024 * All parameters for all chunks that we know/understand are 5025 * listed here. We process them other places and make 5026 * appropriate stop actions per the upper bits. However this 5027 * is the generic routine processor's can call to get back 5028 * an operr.. to either incorporate (init-ack) or send. 5029 */ 5030 padded_size = SCTP_SIZE32(plen); 5031 switch (ptype) { 5032 /* Param's with variable size */ 5033 case SCTP_HEARTBEAT_INFO: 5034 case SCTP_STATE_COOKIE: 5035 case SCTP_UNRECOG_PARAM: 5036 case SCTP_ERROR_CAUSE_IND: 5037 /* ok skip fwd */ 5038 at += padded_size; 5039 break; 5040 /* Param's with variable size within a range */ 5041 case SCTP_CHUNK_LIST: 5042 case SCTP_SUPPORTED_CHUNK_EXT: 5043 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) { 5044 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen); 5045 goto invalid_size; 5046 } 5047 at += padded_size; 5048 break; 5049 case SCTP_SUPPORTED_ADDRTYPE: 5050 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) { 5051 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen); 5052 goto invalid_size; 5053 } 5054 at += padded_size; 5055 break; 5056 case SCTP_RANDOM: 5057 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) { 5058 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen); 5059 goto invalid_size; 5060 } 5061 at += padded_size; 5062 break; 5063 case SCTP_SET_PRIM_ADDR: 5064 case SCTP_DEL_IP_ADDRESS: 5065 case SCTP_ADD_IP_ADDRESS: 5066 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) && 5067 (padded_size != sizeof(struct sctp_asconf_addr_param))) { 5068 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen); 5069 goto invalid_size; 5070 } 5071 at += padded_size; 5072 break; 5073 /* Param's with a fixed size */ 5074 case SCTP_IPV4_ADDRESS: 5075 if (padded_size != sizeof(struct sctp_ipv4addr_param)) { 5076 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen); 5077 goto invalid_size; 5078 } 5079 at += padded_size; 5080 break; 5081 case SCTP_IPV6_ADDRESS: 5082 if (padded_size != sizeof(struct sctp_ipv6addr_param)) { 5083 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen); 5084 goto invalid_size; 5085 } 5086 at += padded_size; 5087 break; 5088 case SCTP_COOKIE_PRESERVE: 5089 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) { 5090 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen); 5091 goto invalid_size; 5092 } 5093 at += padded_size; 5094 break; 5095 case SCTP_HAS_NAT_SUPPORT: 5096 *nat_friendly = 1; 5097 /* fall through */ 5098 case SCTP_PRSCTP_SUPPORTED: 5099 if (padded_size != sizeof(struct sctp_paramhdr)) { 5100 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen); 5101 goto invalid_size; 5102 } 5103 at += padded_size; 5104 break; 5105 case SCTP_ECN_CAPABLE: 5106 if (padded_size != sizeof(struct sctp_paramhdr)) { 5107 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen); 5108 goto invalid_size; 5109 } 5110 at += padded_size; 5111 break; 5112 case SCTP_ULP_ADAPTATION: 5113 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) { 5114 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen); 5115 goto invalid_size; 5116 } 5117 at += padded_size; 5118 break; 5119 case SCTP_SUCCESS_REPORT: 5120 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) { 5121 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen); 5122 goto invalid_size; 5123 } 5124 at += padded_size; 5125 break; 5126 case SCTP_HOSTNAME_ADDRESS: 5127 { 5128 /* We can NOT handle HOST NAME addresses!! */ 5129 int l_len; 5130 5131 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n"); 5132 *abort_processing = 1; 5133 if (op_err == NULL) { 5134 /* Ok need to try to get a mbuf */ 5135#ifdef INET6 5136 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5137#else 5138 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5139#endif 5140 l_len += plen; 5141 l_len += sizeof(struct sctp_paramhdr); 5142 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5143 if (op_err) { 5144 SCTP_BUF_LEN(op_err) = 0; 5145 /* 5146 * pre-reserve space for ip 5147 * and sctp header and 5148 * chunk hdr 5149 */ 5150#ifdef INET6 5151 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5152#else 5153 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5154#endif 5155 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5156 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5157 } 5158 } 5159 if (op_err) { 5160 /* If we have space */ 5161 struct sctp_paramhdr s; 5162 5163 if (err_at % 4) { 5164 uint32_t cpthis = 0; 5165 5166 pad_needed = 4 - (err_at % 4); 5167 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5168 err_at += pad_needed; 5169 } 5170 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR); 5171 s.param_length = htons(sizeof(s) + plen); 5172 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5173 err_at += sizeof(s); 5174 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen)); 5175 if (phdr == NULL) { 5176 sctp_m_freem(op_err); 5177 /* 5178 * we are out of memory but 5179 * we still need to have a 5180 * look at what to do (the 5181 * system is in trouble 5182 * though). 5183 */ 5184 return (NULL); 5185 } 5186 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 5187 } 5188 return (op_err); 5189 break; 5190 } 5191 default: 5192 /* 5193 * we do not recognize the parameter figure out what 5194 * we do. 5195 */ 5196 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype); 5197 if ((ptype & 0x4000) == 0x4000) { 5198 /* Report bit is set?? */ 5199 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n"); 5200 if (op_err == NULL) { 5201 int l_len; 5202 5203 /* Ok need to try to get an mbuf */ 5204#ifdef INET6 5205 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5206#else 5207 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5208#endif 5209 l_len += plen; 5210 l_len += sizeof(struct sctp_paramhdr); 5211 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5212 if (op_err) { 5213 SCTP_BUF_LEN(op_err) = 0; 5214#ifdef INET6 5215 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5216#else 5217 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5218#endif 5219 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5220 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5221 } 5222 } 5223 if (op_err) { 5224 /* If we have space */ 5225 struct sctp_paramhdr s; 5226 5227 if (err_at % 4) { 5228 uint32_t cpthis = 0; 5229 5230 pad_needed = 4 - (err_at % 4); 5231 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5232 err_at += pad_needed; 5233 } 5234 s.param_type = htons(SCTP_UNRECOG_PARAM); 5235 s.param_length = htons(sizeof(s) + plen); 5236 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5237 err_at += sizeof(s); 5238 if (plen > sizeof(tempbuf)) { 5239 plen = sizeof(tempbuf); 5240 } 5241 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen)); 5242 if (phdr == NULL) { 5243 sctp_m_freem(op_err); 5244 /* 5245 * we are out of memory but 5246 * we still need to have a 5247 * look at what to do (the 5248 * system is in trouble 5249 * though). 5250 */ 5251 op_err = NULL; 5252 goto more_processing; 5253 } 5254 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 5255 err_at += plen; 5256 } 5257 } 5258 more_processing: 5259 if ((ptype & 0x8000) == 0x0000) { 5260 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n"); 5261 return (op_err); 5262 } else { 5263 /* skip this chunk and continue processing */ 5264 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n"); 5265 at += SCTP_SIZE32(plen); 5266 } 5267 break; 5268 5269 } 5270 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 5271 } 5272 return (op_err); 5273invalid_size: 5274 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n"); 5275 *abort_processing = 1; 5276 if ((op_err == NULL) && phdr) { 5277 int l_len; 5278 5279#ifdef INET6 5280 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5281#else 5282 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5283#endif 5284 l_len += (2 * sizeof(struct sctp_paramhdr)); 5285 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5286 if (op_err) { 5287 SCTP_BUF_LEN(op_err) = 0; 5288#ifdef INET6 5289 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5290#else 5291 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5292#endif 5293 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5294 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5295 } 5296 } 5297 if ((op_err) && phdr) { 5298 struct sctp_paramhdr s; 5299 5300 if (err_at % 4) { 5301 uint32_t cpthis = 0; 5302 5303 pad_needed = 4 - (err_at % 4); 5304 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5305 err_at += pad_needed; 5306 } 5307 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); 5308 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr)); 5309 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5310 err_at += sizeof(s); 5311 /* Only copy back the p-hdr that caused the issue */ 5312 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr); 5313 } 5314 return (op_err); 5315} 5316 5317static int 5318sctp_are_there_new_addresses(struct sctp_association *asoc, 5319 struct mbuf *in_initpkt, int offset, struct sockaddr *src) 5320{ 5321 /* 5322 * Given a INIT packet, look through the packet to verify that there 5323 * are NO new addresses. As we go through the parameters add reports 5324 * of any un-understood parameters that require an error. Also we 5325 * must return (1) to drop the packet if we see a un-understood 5326 * parameter that tells us to drop the chunk. 5327 */ 5328 struct sockaddr *sa_touse; 5329 struct sockaddr *sa; 5330 struct sctp_paramhdr *phdr, params; 5331 uint16_t ptype, plen; 5332 uint8_t fnd; 5333 struct sctp_nets *net; 5334 5335#ifdef INET 5336 struct sockaddr_in sin4, *sa4; 5337 5338#endif 5339#ifdef INET6 5340 struct sockaddr_in6 sin6, *sa6; 5341 5342#endif 5343 5344#ifdef INET 5345 memset(&sin4, 0, sizeof(sin4)); 5346 sin4.sin_family = AF_INET; 5347 sin4.sin_len = sizeof(sin4); 5348#endif 5349#ifdef INET6 5350 memset(&sin6, 0, sizeof(sin6)); 5351 sin6.sin6_family = AF_INET6; 5352 sin6.sin6_len = sizeof(sin6); 5353#endif 5354 /* First what about the src address of the pkt ? */ 5355 fnd = 0; 5356 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5357 sa = (struct sockaddr *)&net->ro._l_addr; 5358 if (sa->sa_family == src->sa_family) { 5359#ifdef INET 5360 if (sa->sa_family == AF_INET) { 5361 struct sockaddr_in *src4; 5362 5363 sa4 = (struct sockaddr_in *)sa; 5364 src4 = (struct sockaddr_in *)src; 5365 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) { 5366 fnd = 1; 5367 break; 5368 } 5369 } 5370#endif 5371#ifdef INET6 5372 if (sa->sa_family == AF_INET6) { 5373 struct sockaddr_in6 *src6; 5374 5375 sa6 = (struct sockaddr_in6 *)sa; 5376 src6 = (struct sockaddr_in6 *)src; 5377 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) { 5378 fnd = 1; 5379 break; 5380 } 5381 } 5382#endif 5383 } 5384 } 5385 if (fnd == 0) { 5386 /* New address added! no need to look futher. */ 5387 return (1); 5388 } 5389 /* Ok so far lets munge through the rest of the packet */ 5390 offset += sizeof(struct sctp_init_chunk); 5391 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); 5392 while (phdr) { 5393 sa_touse = NULL; 5394 ptype = ntohs(phdr->param_type); 5395 plen = ntohs(phdr->param_length); 5396 switch (ptype) { 5397#ifdef INET 5398 case SCTP_IPV4_ADDRESS: 5399 { 5400 struct sctp_ipv4addr_param *p4, p4_buf; 5401 5402 phdr = sctp_get_next_param(in_initpkt, offset, 5403 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 5404 if (plen != sizeof(struct sctp_ipv4addr_param) || 5405 phdr == NULL) { 5406 return (1); 5407 } 5408 p4 = (struct sctp_ipv4addr_param *)phdr; 5409 sin4.sin_addr.s_addr = p4->addr; 5410 sa_touse = (struct sockaddr *)&sin4; 5411 break; 5412 } 5413#endif 5414#ifdef INET6 5415 case SCTP_IPV6_ADDRESS: 5416 { 5417 struct sctp_ipv6addr_param *p6, p6_buf; 5418 5419 phdr = sctp_get_next_param(in_initpkt, offset, 5420 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 5421 if (plen != sizeof(struct sctp_ipv6addr_param) || 5422 phdr == NULL) { 5423 return (1); 5424 } 5425 p6 = (struct sctp_ipv6addr_param *)phdr; 5426 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 5427 sizeof(p6->addr)); 5428 sa_touse = (struct sockaddr *)&sin6; 5429 break; 5430 } 5431#endif 5432 default: 5433 sa_touse = NULL; 5434 break; 5435 } 5436 if (sa_touse) { 5437 /* ok, sa_touse points to one to check */ 5438 fnd = 0; 5439 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5440 sa = (struct sockaddr *)&net->ro._l_addr; 5441 if (sa->sa_family != sa_touse->sa_family) { 5442 continue; 5443 } 5444#ifdef INET 5445 if (sa->sa_family == AF_INET) { 5446 sa4 = (struct sockaddr_in *)sa; 5447 if (sa4->sin_addr.s_addr == 5448 sin4.sin_addr.s_addr) { 5449 fnd = 1; 5450 break; 5451 } 5452 } 5453#endif 5454#ifdef INET6 5455 if (sa->sa_family == AF_INET6) { 5456 sa6 = (struct sockaddr_in6 *)sa; 5457 if (SCTP6_ARE_ADDR_EQUAL( 5458 sa6, &sin6)) { 5459 fnd = 1; 5460 break; 5461 } 5462 } 5463#endif 5464 } 5465 if (!fnd) { 5466 /* New addr added! no need to look further */ 5467 return (1); 5468 } 5469 } 5470 offset += SCTP_SIZE32(plen); 5471 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); 5472 } 5473 return (0); 5474} 5475 5476/* 5477 * Given a MBUF chain that was sent into us containing an INIT. Build a 5478 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done 5479 * a pullup to include IPv6/4header, SCTP header and initial part of INIT 5480 * message (i.e. the struct sctp_init_msg). 5481 */ 5482void 5483sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 5484 struct mbuf *init_pkt, int iphlen, int offset, 5485 struct sockaddr *src, struct sockaddr *dst, 5486 struct sctphdr *sh, struct sctp_init_chunk *init_chk, 5487 uint8_t use_mflowid, uint32_t mflowid, 5488 uint32_t vrf_id, uint16_t port, int hold_inp_lock) 5489{ 5490 struct sctp_association *asoc; 5491 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err; 5492 struct sctp_init_ack_chunk *initack; 5493 struct sctp_adaptation_layer_indication *ali; 5494 struct sctp_supported_chunk_types_param *pr_supported; 5495 struct sctp_paramhdr *ph; 5496 union sctp_sockstore *over_addr; 5497 struct sctp_scoping scp; 5498 5499#ifdef INET 5500 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst; 5501 struct sockaddr_in *src4 = (struct sockaddr_in *)src; 5502 struct sockaddr_in *sin; 5503 5504#endif 5505#ifdef INET6 5506 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst; 5507 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src; 5508 struct sockaddr_in6 *sin6; 5509 5510#endif 5511 struct sockaddr *to; 5512 struct sctp_state_cookie stc; 5513 struct sctp_nets *net = NULL; 5514 uint8_t *signature = NULL; 5515 int cnt_inits_to = 0; 5516 uint16_t his_limit, i_want; 5517 int abort_flag; 5518 int nat_friendly = 0; 5519 struct socket *so; 5520 uint16_t num_ext, chunk_len, padding_len, parameter_len; 5521 5522 if (stcb) { 5523 asoc = &stcb->asoc; 5524 } else { 5525 asoc = NULL; 5526 } 5527 if ((asoc != NULL) && 5528 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 5529 (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) { 5530 /* new addresses, out of here in non-cookie-wait states */ 5531 /* 5532 * Send a ABORT, we don't add the new address error clause 5533 * though we even set the T bit and copy in the 0 tag.. this 5534 * looks no different than if no listener was present. 5535 */ 5536 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 5537 "Address added"); 5538 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err, 5539 use_mflowid, mflowid, 5540 vrf_id, port); 5541 return; 5542 } 5543 abort_flag = 0; 5544 op_err = sctp_arethere_unrecognized_parameters(init_pkt, 5545 (offset + sizeof(struct sctp_init_chunk)), 5546 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly); 5547 if (abort_flag) { 5548do_a_abort: 5549 if (op_err == NULL) { 5550 char msg[SCTP_DIAG_INFO_LEN]; 5551 5552 snprintf(msg, sizeof(msg), "%s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__); 5553 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 5554 msg); 5555 } 5556 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 5557 init_chk->init.initiate_tag, op_err, 5558 use_mflowid, mflowid, 5559 vrf_id, port); 5560 return; 5561 } 5562 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 5563 if (m == NULL) { 5564 /* No memory, INIT timer will re-attempt. */ 5565 if (op_err) 5566 sctp_m_freem(op_err); 5567 return; 5568 } 5569 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk); 5570 padding_len = 0; 5571 5572 /* 5573 * We might not overwrite the identification[] completely and on 5574 * some platforms time_entered will contain some padding. Therefore 5575 * zero out the cookie to avoid putting uninitialized memory on the 5576 * wire. 5577 */ 5578 memset(&stc, 0, sizeof(struct sctp_state_cookie)); 5579 5580 /* the time I built cookie */ 5581 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered); 5582 5583 /* populate any tie tags */ 5584 if (asoc != NULL) { 5585 /* unlock before tag selections */ 5586 stc.tie_tag_my_vtag = asoc->my_vtag_nonce; 5587 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce; 5588 stc.cookie_life = asoc->cookie_life; 5589 net = asoc->primary_destination; 5590 } else { 5591 stc.tie_tag_my_vtag = 0; 5592 stc.tie_tag_peer_vtag = 0; 5593 /* life I will award this cookie */ 5594 stc.cookie_life = inp->sctp_ep.def_cookie_life; 5595 } 5596 5597 /* copy in the ports for later check */ 5598 stc.myport = sh->dest_port; 5599 stc.peerport = sh->src_port; 5600 5601 /* 5602 * If we wanted to honor cookie life extentions, we would add to 5603 * stc.cookie_life. For now we should NOT honor any extension 5604 */ 5605 stc.site_scope = stc.local_scope = stc.loopback_scope = 0; 5606 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 5607 stc.ipv6_addr_legal = 1; 5608 if (SCTP_IPV6_V6ONLY(inp)) { 5609 stc.ipv4_addr_legal = 0; 5610 } else { 5611 stc.ipv4_addr_legal = 1; 5612 } 5613 } else { 5614 stc.ipv6_addr_legal = 0; 5615 stc.ipv4_addr_legal = 1; 5616 } 5617#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 5618 stc.ipv4_scope = 1; 5619#else 5620 stc.ipv4_scope = 0; 5621#endif 5622 if (net == NULL) { 5623 to = src; 5624 switch (dst->sa_family) { 5625#ifdef INET 5626 case AF_INET: 5627 { 5628 /* lookup address */ 5629 stc.address[0] = src4->sin_addr.s_addr; 5630 stc.address[1] = 0; 5631 stc.address[2] = 0; 5632 stc.address[3] = 0; 5633 stc.addr_type = SCTP_IPV4_ADDRESS; 5634 /* local from address */ 5635 stc.laddress[0] = dst4->sin_addr.s_addr; 5636 stc.laddress[1] = 0; 5637 stc.laddress[2] = 0; 5638 stc.laddress[3] = 0; 5639 stc.laddr_type = SCTP_IPV4_ADDRESS; 5640 /* scope_id is only for v6 */ 5641 stc.scope_id = 0; 5642#ifndef SCTP_DONT_DO_PRIVADDR_SCOPE 5643 if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) { 5644 stc.ipv4_scope = 1; 5645 } 5646#else 5647 stc.ipv4_scope = 1; 5648#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 5649 /* Must use the address in this case */ 5650 if (sctp_is_address_on_local_host(src, vrf_id)) { 5651 stc.loopback_scope = 1; 5652 stc.ipv4_scope = 1; 5653 stc.site_scope = 1; 5654 stc.local_scope = 0; 5655 } 5656 break; 5657 } 5658#endif 5659#ifdef INET6 5660 case AF_INET6: 5661 { 5662 stc.addr_type = SCTP_IPV6_ADDRESS; 5663 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr)); 5664 stc.scope_id = in6_getscope(&src6->sin6_addr); 5665 if (sctp_is_address_on_local_host(src, vrf_id)) { 5666 stc.loopback_scope = 1; 5667 stc.local_scope = 0; 5668 stc.site_scope = 1; 5669 stc.ipv4_scope = 1; 5670 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) { 5671 /* 5672 * If the new destination is a 5673 * LINK_LOCAL we must have common 5674 * both site and local scope. Don't 5675 * set local scope though since we 5676 * must depend on the source to be 5677 * added implicitly. We cannot 5678 * assure just because we share one 5679 * link that all links are common. 5680 */ 5681 stc.local_scope = 0; 5682 stc.site_scope = 1; 5683 stc.ipv4_scope = 1; 5684 /* 5685 * we start counting for the private 5686 * address stuff at 1. since the 5687 * link local we source from won't 5688 * show up in our scoped count. 5689 */ 5690 cnt_inits_to = 1; 5691 /* 5692 * pull out the scope_id from 5693 * incoming pkt 5694 */ 5695 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) { 5696 /* 5697 * If the new destination is 5698 * SITE_LOCAL then we must have site 5699 * scope in common. 5700 */ 5701 stc.site_scope = 1; 5702 } 5703 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr)); 5704 stc.laddr_type = SCTP_IPV6_ADDRESS; 5705 break; 5706 } 5707#endif 5708 default: 5709 /* TSNH */ 5710 goto do_a_abort; 5711 break; 5712 } 5713 } else { 5714 /* set the scope per the existing tcb */ 5715 5716#ifdef INET6 5717 struct sctp_nets *lnet; 5718 5719#endif 5720 5721 stc.loopback_scope = asoc->scope.loopback_scope; 5722 stc.ipv4_scope = asoc->scope.ipv4_local_scope; 5723 stc.site_scope = asoc->scope.site_scope; 5724 stc.local_scope = asoc->scope.local_scope; 5725#ifdef INET6 5726 /* Why do we not consider IPv4 LL addresses? */ 5727 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { 5728 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) { 5729 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) { 5730 /* 5731 * if we have a LL address, start 5732 * counting at 1. 5733 */ 5734 cnt_inits_to = 1; 5735 } 5736 } 5737 } 5738#endif 5739 /* use the net pointer */ 5740 to = (struct sockaddr *)&net->ro._l_addr; 5741 switch (to->sa_family) { 5742#ifdef INET 5743 case AF_INET: 5744 sin = (struct sockaddr_in *)to; 5745 stc.address[0] = sin->sin_addr.s_addr; 5746 stc.address[1] = 0; 5747 stc.address[2] = 0; 5748 stc.address[3] = 0; 5749 stc.addr_type = SCTP_IPV4_ADDRESS; 5750 if (net->src_addr_selected == 0) { 5751 /* 5752 * strange case here, the INIT should have 5753 * did the selection. 5754 */ 5755 net->ro._s_addr = sctp_source_address_selection(inp, 5756 stcb, (sctp_route_t *) & net->ro, 5757 net, 0, vrf_id); 5758 if (net->ro._s_addr == NULL) 5759 return; 5760 5761 net->src_addr_selected = 1; 5762 5763 } 5764 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr; 5765 stc.laddress[1] = 0; 5766 stc.laddress[2] = 0; 5767 stc.laddress[3] = 0; 5768 stc.laddr_type = SCTP_IPV4_ADDRESS; 5769 /* scope_id is only for v6 */ 5770 stc.scope_id = 0; 5771 break; 5772#endif 5773#ifdef INET6 5774 case AF_INET6: 5775 sin6 = (struct sockaddr_in6 *)to; 5776 memcpy(&stc.address, &sin6->sin6_addr, 5777 sizeof(struct in6_addr)); 5778 stc.addr_type = SCTP_IPV6_ADDRESS; 5779 stc.scope_id = sin6->sin6_scope_id; 5780 if (net->src_addr_selected == 0) { 5781 /* 5782 * strange case here, the INIT should have 5783 * done the selection. 5784 */ 5785 net->ro._s_addr = sctp_source_address_selection(inp, 5786 stcb, (sctp_route_t *) & net->ro, 5787 net, 0, vrf_id); 5788 if (net->ro._s_addr == NULL) 5789 return; 5790 5791 net->src_addr_selected = 1; 5792 } 5793 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr, 5794 sizeof(struct in6_addr)); 5795 stc.laddr_type = SCTP_IPV6_ADDRESS; 5796 break; 5797#endif 5798 } 5799 } 5800 /* Now lets put the SCTP header in place */ 5801 initack = mtod(m, struct sctp_init_ack_chunk *); 5802 /* Save it off for quick ref */ 5803 stc.peers_vtag = init_chk->init.initiate_tag; 5804 /* who are we */ 5805 memcpy(stc.identification, SCTP_VERSION_STRING, 5806 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification))); 5807 memset(stc.reserved, 0, SCTP_RESERVE_SPACE); 5808 /* now the chunk header */ 5809 initack->ch.chunk_type = SCTP_INITIATION_ACK; 5810 initack->ch.chunk_flags = 0; 5811 /* fill in later from mbuf we build */ 5812 initack->ch.chunk_length = 0; 5813 /* place in my tag */ 5814 if ((asoc != NULL) && 5815 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 5816 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) || 5817 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) { 5818 /* re-use the v-tags and init-seq here */ 5819 initack->init.initiate_tag = htonl(asoc->my_vtag); 5820 initack->init.initial_tsn = htonl(asoc->init_seq_number); 5821 } else { 5822 uint32_t vtag, itsn; 5823 5824 if (hold_inp_lock) { 5825 SCTP_INP_INCR_REF(inp); 5826 SCTP_INP_RUNLOCK(inp); 5827 } 5828 if (asoc) { 5829 atomic_add_int(&asoc->refcnt, 1); 5830 SCTP_TCB_UNLOCK(stcb); 5831 new_tag: 5832 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); 5833 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) { 5834 /* 5835 * Got a duplicate vtag on some guy behind a 5836 * nat make sure we don't use it. 5837 */ 5838 goto new_tag; 5839 } 5840 initack->init.initiate_tag = htonl(vtag); 5841 /* get a TSN to use too */ 5842 itsn = sctp_select_initial_TSN(&inp->sctp_ep); 5843 initack->init.initial_tsn = htonl(itsn); 5844 SCTP_TCB_LOCK(stcb); 5845 atomic_add_int(&asoc->refcnt, -1); 5846 } else { 5847 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); 5848 initack->init.initiate_tag = htonl(vtag); 5849 /* get a TSN to use too */ 5850 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep)); 5851 } 5852 if (hold_inp_lock) { 5853 SCTP_INP_RLOCK(inp); 5854 SCTP_INP_DECR_REF(inp); 5855 } 5856 } 5857 /* save away my tag to */ 5858 stc.my_vtag = initack->init.initiate_tag; 5859 5860 /* set up some of the credits. */ 5861 so = inp->sctp_socket; 5862 if (so == NULL) { 5863 /* memory problem */ 5864 sctp_m_freem(m); 5865 return; 5866 } else { 5867 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND)); 5868 } 5869 /* set what I want */ 5870 his_limit = ntohs(init_chk->init.num_inbound_streams); 5871 /* choose what I want */ 5872 if (asoc != NULL) { 5873 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) { 5874 i_want = asoc->streamoutcnt; 5875 } else { 5876 i_want = inp->sctp_ep.pre_open_stream_count; 5877 } 5878 } else { 5879 i_want = inp->sctp_ep.pre_open_stream_count; 5880 } 5881 if (his_limit < i_want) { 5882 /* I Want more :< */ 5883 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams; 5884 } else { 5885 /* I can have what I want :> */ 5886 initack->init.num_outbound_streams = htons(i_want); 5887 } 5888 /* tell him his limit. */ 5889 initack->init.num_inbound_streams = 5890 htons(inp->sctp_ep.max_open_streams_intome); 5891 5892 /* adaptation layer indication parameter */ 5893 if (inp->sctp_ep.adaptation_layer_indicator_provided) { 5894 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication); 5895 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len); 5896 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 5897 ali->ph.param_length = htons(parameter_len); 5898 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator); 5899 chunk_len += parameter_len; 5900 } 5901 /* ECN parameter */ 5902 if (((asoc != NULL) && (asoc->ecn_supported == 1)) || 5903 ((asoc == NULL) && (inp->ecn_supported == 1))) { 5904 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5905 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5906 ph->param_type = htons(SCTP_ECN_CAPABLE); 5907 ph->param_length = htons(parameter_len); 5908 chunk_len += parameter_len; 5909 } 5910 /* PR-SCTP supported parameter */ 5911 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) || 5912 ((asoc == NULL) && (inp->prsctp_supported == 1))) { 5913 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5914 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5915 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED); 5916 ph->param_length = htons(parameter_len); 5917 chunk_len += parameter_len; 5918 } 5919 /* Add NAT friendly parameter */ 5920 if (nat_friendly) { 5921 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5922 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5923 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); 5924 ph->param_length = htons(parameter_len); 5925 chunk_len += parameter_len; 5926 } 5927 /* And now tell the peer which extensions we support */ 5928 num_ext = 0; 5929 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len); 5930 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) || 5931 ((asoc == NULL) && (inp->prsctp_supported == 1))) { 5932 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 5933 } 5934 if (((asoc != NULL) && (asoc->auth_supported == 1)) || 5935 ((asoc == NULL) && (inp->auth_supported == 1))) { 5936 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 5937 } 5938 if (((asoc != NULL) && (asoc->asconf_supported == 1)) || 5939 ((asoc == NULL) && (inp->asconf_supported == 1))) { 5940 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 5941 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 5942 } 5943 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) || 5944 ((asoc == NULL) && (inp->reconfig_supported == 1))) { 5945 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 5946 } 5947 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) || 5948 ((asoc == NULL) && (inp->nrsack_supported == 1))) { 5949 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; 5950 } 5951 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) || 5952 ((asoc == NULL) && (inp->pktdrop_supported == 1))) { 5953 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 5954 } 5955 if (num_ext > 0) { 5956 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext; 5957 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 5958 pr_supported->ph.param_length = htons(parameter_len); 5959 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5960 chunk_len += parameter_len; 5961 } 5962 /* add authentication parameters */ 5963 if (((asoc != NULL) && (asoc->auth_supported == 1)) || 5964 ((asoc == NULL) && (inp->auth_supported == 1))) { 5965 struct sctp_auth_random *randp; 5966 struct sctp_auth_hmac_algo *hmacs; 5967 struct sctp_auth_chunk_list *chunks; 5968 5969 if (padding_len > 0) { 5970 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 5971 chunk_len += padding_len; 5972 padding_len = 0; 5973 } 5974 /* generate and add RANDOM parameter */ 5975 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len); 5976 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + 5977 SCTP_AUTH_RANDOM_SIZE_DEFAULT; 5978 randp->ph.param_type = htons(SCTP_RANDOM); 5979 randp->ph.param_length = htons(parameter_len); 5980 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT); 5981 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5982 chunk_len += parameter_len; 5983 5984 if (padding_len > 0) { 5985 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 5986 chunk_len += padding_len; 5987 padding_len = 0; 5988 } 5989 /* add HMAC_ALGO parameter */ 5990 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len); 5991 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) + 5992 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs, 5993 (uint8_t *) hmacs->hmac_ids); 5994 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 5995 hmacs->ph.param_length = htons(parameter_len); 5996 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5997 chunk_len += parameter_len; 5998 5999 if (padding_len > 0) { 6000 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 6001 chunk_len += padding_len; 6002 padding_len = 0; 6003 } 6004 /* add CHUNKS parameter */ 6005 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len); 6006 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) + 6007 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks, 6008 chunks->chunk_types); 6009 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 6010 chunks->ph.param_length = htons(parameter_len); 6011 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6012 chunk_len += parameter_len; 6013 } 6014 SCTP_BUF_LEN(m) = chunk_len; 6015 m_last = m; 6016 /* now the addresses */ 6017 /* 6018 * To optimize this we could put the scoping stuff into a structure 6019 * and remove the individual uint8's from the stc structure. Then we 6020 * could just sifa in the address within the stc.. but for now this 6021 * is a quick hack to get the address stuff teased apart. 6022 */ 6023 scp.ipv4_addr_legal = stc.ipv4_addr_legal; 6024 scp.ipv6_addr_legal = stc.ipv6_addr_legal; 6025 scp.loopback_scope = stc.loopback_scope; 6026 scp.ipv4_local_scope = stc.ipv4_scope; 6027 scp.local_scope = stc.local_scope; 6028 scp.site_scope = stc.site_scope; 6029 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last, 6030 cnt_inits_to, 6031 &padding_len, &chunk_len); 6032 /* padding_len can only be positive, if no addresses have been added */ 6033 if (padding_len > 0) { 6034 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 6035 chunk_len += padding_len; 6036 SCTP_BUF_LEN(m) += padding_len; 6037 padding_len = 0; 6038 } 6039 /* tack on the operational error if present */ 6040 if (op_err) { 6041 parameter_len = 0; 6042 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 6043 parameter_len += SCTP_BUF_LEN(m_tmp); 6044 } 6045 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6046 SCTP_BUF_NEXT(m_last) = op_err; 6047 while (SCTP_BUF_NEXT(m_last) != NULL) { 6048 m_last = SCTP_BUF_NEXT(m_last); 6049 } 6050 chunk_len += parameter_len; 6051 } 6052 if (padding_len > 0) { 6053 m_last = sctp_add_pad_tombuf(m_last, padding_len); 6054 if (m_last == NULL) { 6055 /* Houston we have a problem, no space */ 6056 sctp_m_freem(m); 6057 return; 6058 } 6059 chunk_len += padding_len; 6060 padding_len = 0; 6061 } 6062 /* Now we must build a cookie */ 6063 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature); 6064 if (m_cookie == NULL) { 6065 /* memory problem */ 6066 sctp_m_freem(m); 6067 return; 6068 } 6069 /* Now append the cookie to the end and update the space/size */ 6070 SCTP_BUF_NEXT(m_last) = m_cookie; 6071 parameter_len = 0; 6072 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 6073 parameter_len += SCTP_BUF_LEN(m_tmp); 6074 if (SCTP_BUF_NEXT(m_tmp) == NULL) { 6075 m_last = m_tmp; 6076 } 6077 } 6078 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6079 chunk_len += parameter_len; 6080 6081 /* 6082 * Place in the size, but we don't include the last pad (if any) in 6083 * the INIT-ACK. 6084 */ 6085 initack->ch.chunk_length = htons(chunk_len); 6086 6087 /* 6088 * Time to sign the cookie, we don't sign over the cookie signature 6089 * though thus we set trailer. 6090 */ 6091 (void)sctp_hmac_m(SCTP_HMAC, 6092 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)], 6093 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr), 6094 (uint8_t *) signature, SCTP_SIGNATURE_SIZE); 6095 /* 6096 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return 6097 * here since the timer will drive a retranmission. 6098 */ 6099 if (padding_len > 0) { 6100 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 6101 sctp_m_freem(m); 6102 return; 6103 } 6104 } 6105 if (stc.loopback_scope) { 6106 over_addr = (union sctp_sockstore *)dst; 6107 } else { 6108 over_addr = NULL; 6109 } 6110 6111 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0, 6112 0, 0, 6113 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag, 6114 port, over_addr, 6115 use_mflowid, mflowid, 6116 SCTP_SO_NOT_LOCKED); 6117 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 6118} 6119 6120 6121static void 6122sctp_prune_prsctp(struct sctp_tcb *stcb, 6123 struct sctp_association *asoc, 6124 struct sctp_sndrcvinfo *srcv, 6125 int dataout) 6126{ 6127 int freed_spc = 0; 6128 struct sctp_tmit_chunk *chk, *nchk; 6129 6130 SCTP_TCB_LOCK_ASSERT(stcb); 6131 if ((asoc->prsctp_supported) && 6132 (asoc->sent_queue_cnt_removeable > 0)) { 6133 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 6134 /* 6135 * Look for chunks marked with the PR_SCTP flag AND 6136 * the buffer space flag. If the one being sent is 6137 * equal or greater priority then purge the old one 6138 * and free some space. 6139 */ 6140 if (PR_SCTP_BUF_ENABLED(chk->flags)) { 6141 /* 6142 * This one is PR-SCTP AND buffer space 6143 * limited type 6144 */ 6145 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 6146 /* 6147 * Lower numbers equates to higher 6148 * priority so if the one we are 6149 * looking at has a larger or equal 6150 * priority we want to drop the data 6151 * and NOT retransmit it. 6152 */ 6153 if (chk->data) { 6154 /* 6155 * We release the book_size 6156 * if the mbuf is here 6157 */ 6158 int ret_spc; 6159 uint8_t sent; 6160 6161 if (chk->sent > SCTP_DATAGRAM_UNSENT) 6162 sent = 1; 6163 else 6164 sent = 0; 6165 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 6166 sent, 6167 SCTP_SO_LOCKED); 6168 freed_spc += ret_spc; 6169 if (freed_spc >= dataout) { 6170 return; 6171 } 6172 } /* if chunk was present */ 6173 } /* if of sufficent priority */ 6174 } /* if chunk has enabled */ 6175 } /* tailqforeach */ 6176 6177 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 6178 /* Here we must move to the sent queue and mark */ 6179 if (PR_SCTP_BUF_ENABLED(chk->flags)) { 6180 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 6181 if (chk->data) { 6182 /* 6183 * We release the book_size 6184 * if the mbuf is here 6185 */ 6186 int ret_spc; 6187 6188 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 6189 0, SCTP_SO_LOCKED); 6190 6191 freed_spc += ret_spc; 6192 if (freed_spc >= dataout) { 6193 return; 6194 } 6195 } /* end if chk->data */ 6196 } /* end if right class */ 6197 } /* end if chk pr-sctp */ 6198 } /* tailqforeachsafe (chk) */ 6199 } /* if enabled in asoc */ 6200} 6201 6202int 6203sctp_get_frag_point(struct sctp_tcb *stcb, 6204 struct sctp_association *asoc) 6205{ 6206 int siz, ovh; 6207 6208 /* 6209 * For endpoints that have both v6 and v4 addresses we must reserve 6210 * room for the ipv6 header, for those that are only dealing with V4 6211 * we use a larger frag point. 6212 */ 6213 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 6214 ovh = SCTP_MED_OVERHEAD; 6215 } else { 6216 ovh = SCTP_MED_V4_OVERHEAD; 6217 } 6218 6219 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu) 6220 siz = asoc->smallest_mtu - ovh; 6221 else 6222 siz = (stcb->asoc.sctp_frag_point - ovh); 6223 /* 6224 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) { 6225 */ 6226 /* A data chunk MUST fit in a cluster */ 6227 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */ 6228 /* } */ 6229 6230 /* adjust for an AUTH chunk if DATA requires auth */ 6231 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) 6232 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 6233 6234 if (siz % 4) { 6235 /* make it an even word boundary please */ 6236 siz -= (siz % 4); 6237 } 6238 return (siz); 6239} 6240 6241static void 6242sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp) 6243{ 6244 /* 6245 * We assume that the user wants PR_SCTP_TTL if the user provides a 6246 * positive lifetime but does not specify any PR_SCTP policy. 6247 */ 6248 if (PR_SCTP_ENABLED(sp->sinfo_flags)) { 6249 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); 6250 } else if (sp->timetolive > 0) { 6251 sp->sinfo_flags |= SCTP_PR_SCTP_TTL; 6252 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); 6253 } else { 6254 return; 6255 } 6256 switch (PR_SCTP_POLICY(sp->sinfo_flags)) { 6257 case CHUNK_FLAGS_PR_SCTP_BUF: 6258 /* 6259 * Time to live is a priority stored in tv_sec when doing 6260 * the buffer drop thing. 6261 */ 6262 sp->ts.tv_sec = sp->timetolive; 6263 sp->ts.tv_usec = 0; 6264 break; 6265 case CHUNK_FLAGS_PR_SCTP_TTL: 6266 { 6267 struct timeval tv; 6268 6269 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 6270 tv.tv_sec = sp->timetolive / 1000; 6271 tv.tv_usec = (sp->timetolive * 1000) % 1000000; 6272 /* 6273 * TODO sctp_constants.h needs alternative time 6274 * macros when _KERNEL is undefined. 6275 */ 6276 timevaladd(&sp->ts, &tv); 6277 } 6278 break; 6279 case CHUNK_FLAGS_PR_SCTP_RTX: 6280 /* 6281 * Time to live is a the number or retransmissions stored in 6282 * tv_sec. 6283 */ 6284 sp->ts.tv_sec = sp->timetolive; 6285 sp->ts.tv_usec = 0; 6286 break; 6287 default: 6288 SCTPDBG(SCTP_DEBUG_USRREQ1, 6289 "Unknown PR_SCTP policy %u.\n", 6290 PR_SCTP_POLICY(sp->sinfo_flags)); 6291 break; 6292 } 6293} 6294 6295static int 6296sctp_msg_append(struct sctp_tcb *stcb, 6297 struct sctp_nets *net, 6298 struct mbuf *m, 6299 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock) 6300{ 6301 int error = 0; 6302 struct mbuf *at; 6303 struct sctp_stream_queue_pending *sp = NULL; 6304 struct sctp_stream_out *strm; 6305 6306 /* 6307 * Given an mbuf chain, put it into the association send queue and 6308 * place it on the wheel 6309 */ 6310 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) { 6311 /* Invalid stream number */ 6312 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 6313 error = EINVAL; 6314 goto out_now; 6315 } 6316 if ((stcb->asoc.stream_locked) && 6317 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) { 6318 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 6319 error = EINVAL; 6320 goto out_now; 6321 } 6322 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 6323 /* Now can we send this? */ 6324 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) || 6325 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 6326 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 6327 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) { 6328 /* got data while shutting down */ 6329 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 6330 error = ECONNRESET; 6331 goto out_now; 6332 } 6333 sctp_alloc_a_strmoq(stcb, sp); 6334 if (sp == NULL) { 6335 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6336 error = ENOMEM; 6337 goto out_now; 6338 } 6339 sp->sinfo_flags = srcv->sinfo_flags; 6340 sp->timetolive = srcv->sinfo_timetolive; 6341 sp->ppid = srcv->sinfo_ppid; 6342 sp->context = srcv->sinfo_context; 6343 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 6344 sp->net = net; 6345 atomic_add_int(&sp->net->ref_count, 1); 6346 } else { 6347 sp->net = NULL; 6348 } 6349 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 6350 sp->stream = srcv->sinfo_stream; 6351 sp->msg_is_complete = 1; 6352 sp->sender_all_done = 1; 6353 sp->some_taken = 0; 6354 sp->data = m; 6355 sp->tail_mbuf = NULL; 6356 sctp_set_prsctp_policy(sp); 6357 /* 6358 * We could in theory (for sendall) sifa the length in, but we would 6359 * still have to hunt through the chain since we need to setup the 6360 * tail_mbuf 6361 */ 6362 sp->length = 0; 6363 for (at = m; at; at = SCTP_BUF_NEXT(at)) { 6364 if (SCTP_BUF_NEXT(at) == NULL) 6365 sp->tail_mbuf = at; 6366 sp->length += SCTP_BUF_LEN(at); 6367 } 6368 if (srcv->sinfo_keynumber_valid) { 6369 sp->auth_keyid = srcv->sinfo_keynumber; 6370 } else { 6371 sp->auth_keyid = stcb->asoc.authinfo.active_keyid; 6372 } 6373 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { 6374 sctp_auth_key_acquire(stcb, sp->auth_keyid); 6375 sp->holds_key_ref = 1; 6376 } 6377 if (hold_stcb_lock == 0) { 6378 SCTP_TCB_SEND_LOCK(stcb); 6379 } 6380 sctp_snd_sb_alloc(stcb, sp->length); 6381 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1); 6382 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 6383 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1); 6384 m = NULL; 6385 if (hold_stcb_lock == 0) { 6386 SCTP_TCB_SEND_UNLOCK(stcb); 6387 } 6388out_now: 6389 if (m) { 6390 sctp_m_freem(m); 6391 } 6392 return (error); 6393} 6394 6395 6396static struct mbuf * 6397sctp_copy_mbufchain(struct mbuf *clonechain, 6398 struct mbuf *outchain, 6399 struct mbuf **endofchain, 6400 int can_take_mbuf, 6401 int sizeofcpy, 6402 uint8_t copy_by_ref) 6403{ 6404 struct mbuf *m; 6405 struct mbuf *appendchain; 6406 caddr_t cp; 6407 int len; 6408 6409 if (endofchain == NULL) { 6410 /* error */ 6411error_out: 6412 if (outchain) 6413 sctp_m_freem(outchain); 6414 return (NULL); 6415 } 6416 if (can_take_mbuf) { 6417 appendchain = clonechain; 6418 } else { 6419 if (!copy_by_ref && 6420 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN))) 6421 ) { 6422 /* Its not in a cluster */ 6423 if (*endofchain == NULL) { 6424 /* lets get a mbuf cluster */ 6425 if (outchain == NULL) { 6426 /* This is the general case */ 6427 new_mbuf: 6428 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER); 6429 if (outchain == NULL) { 6430 goto error_out; 6431 } 6432 SCTP_BUF_LEN(outchain) = 0; 6433 *endofchain = outchain; 6434 /* get the prepend space */ 6435 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4)); 6436 } else { 6437 /* 6438 * We really should not get a NULL 6439 * in endofchain 6440 */ 6441 /* find end */ 6442 m = outchain; 6443 while (m) { 6444 if (SCTP_BUF_NEXT(m) == NULL) { 6445 *endofchain = m; 6446 break; 6447 } 6448 m = SCTP_BUF_NEXT(m); 6449 } 6450 /* sanity */ 6451 if (*endofchain == NULL) { 6452 /* 6453 * huh, TSNH XXX maybe we 6454 * should panic 6455 */ 6456 sctp_m_freem(outchain); 6457 goto new_mbuf; 6458 } 6459 } 6460 /* get the new end of length */ 6461 len = M_TRAILINGSPACE(*endofchain); 6462 } else { 6463 /* how much is left at the end? */ 6464 len = M_TRAILINGSPACE(*endofchain); 6465 } 6466 /* Find the end of the data, for appending */ 6467 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain))); 6468 6469 /* Now lets copy it out */ 6470 if (len >= sizeofcpy) { 6471 /* It all fits, copy it in */ 6472 m_copydata(clonechain, 0, sizeofcpy, cp); 6473 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 6474 } else { 6475 /* fill up the end of the chain */ 6476 if (len > 0) { 6477 m_copydata(clonechain, 0, len, cp); 6478 SCTP_BUF_LEN((*endofchain)) += len; 6479 /* now we need another one */ 6480 sizeofcpy -= len; 6481 } 6482 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER); 6483 if (m == NULL) { 6484 /* We failed */ 6485 goto error_out; 6486 } 6487 SCTP_BUF_NEXT((*endofchain)) = m; 6488 *endofchain = m; 6489 cp = mtod((*endofchain), caddr_t); 6490 m_copydata(clonechain, len, sizeofcpy, cp); 6491 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 6492 } 6493 return (outchain); 6494 } else { 6495 /* copy the old fashion way */ 6496 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT); 6497#ifdef SCTP_MBUF_LOGGING 6498 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 6499 struct mbuf *mat; 6500 6501 for (mat = appendchain; mat; mat = SCTP_BUF_NEXT(mat)) { 6502 if (SCTP_BUF_IS_EXTENDED(mat)) { 6503 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 6504 } 6505 } 6506 } 6507#endif 6508 } 6509 } 6510 if (appendchain == NULL) { 6511 /* error */ 6512 if (outchain) 6513 sctp_m_freem(outchain); 6514 return (NULL); 6515 } 6516 if (outchain) { 6517 /* tack on to the end */ 6518 if (*endofchain != NULL) { 6519 SCTP_BUF_NEXT(((*endofchain))) = appendchain; 6520 } else { 6521 m = outchain; 6522 while (m) { 6523 if (SCTP_BUF_NEXT(m) == NULL) { 6524 SCTP_BUF_NEXT(m) = appendchain; 6525 break; 6526 } 6527 m = SCTP_BUF_NEXT(m); 6528 } 6529 } 6530 /* 6531 * save off the end and update the end-chain postion 6532 */ 6533 m = appendchain; 6534 while (m) { 6535 if (SCTP_BUF_NEXT(m) == NULL) { 6536 *endofchain = m; 6537 break; 6538 } 6539 m = SCTP_BUF_NEXT(m); 6540 } 6541 return (outchain); 6542 } else { 6543 /* save off the end and update the end-chain postion */ 6544 m = appendchain; 6545 while (m) { 6546 if (SCTP_BUF_NEXT(m) == NULL) { 6547 *endofchain = m; 6548 break; 6549 } 6550 m = SCTP_BUF_NEXT(m); 6551 } 6552 return (appendchain); 6553 } 6554} 6555 6556static int 6557sctp_med_chunk_output(struct sctp_inpcb *inp, 6558 struct sctp_tcb *stcb, 6559 struct sctp_association *asoc, 6560 int *num_out, 6561 int *reason_code, 6562 int control_only, int from_where, 6563 struct timeval *now, int *now_filled, int frag_point, int so_locked 6564#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 6565 SCTP_UNUSED 6566#endif 6567); 6568 6569static void 6570sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr, 6571 uint32_t val SCTP_UNUSED) 6572{ 6573 struct sctp_copy_all *ca; 6574 struct mbuf *m; 6575 int ret = 0; 6576 int added_control = 0; 6577 int un_sent, do_chunk_output = 1; 6578 struct sctp_association *asoc; 6579 struct sctp_nets *net; 6580 6581 ca = (struct sctp_copy_all *)ptr; 6582 if (ca->m == NULL) { 6583 return; 6584 } 6585 if (ca->inp != inp) { 6586 /* TSNH */ 6587 return; 6588 } 6589 if (ca->sndlen > 0) { 6590 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT); 6591 if (m == NULL) { 6592 /* can't copy so we are done */ 6593 ca->cnt_failed++; 6594 return; 6595 } 6596#ifdef SCTP_MBUF_LOGGING 6597 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 6598 struct mbuf *mat; 6599 6600 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) { 6601 if (SCTP_BUF_IS_EXTENDED(mat)) { 6602 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 6603 } 6604 } 6605 } 6606#endif 6607 } else { 6608 m = NULL; 6609 } 6610 SCTP_TCB_LOCK_ASSERT(stcb); 6611 if (stcb->asoc.alternate) { 6612 net = stcb->asoc.alternate; 6613 } else { 6614 net = stcb->asoc.primary_destination; 6615 } 6616 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) { 6617 /* Abort this assoc with m as the user defined reason */ 6618 if (m != NULL) { 6619 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT); 6620 } else { 6621 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 6622 0, M_NOWAIT, 1, MT_DATA); 6623 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr); 6624 } 6625 if (m != NULL) { 6626 struct sctp_paramhdr *ph; 6627 6628 ph = mtod(m, struct sctp_paramhdr *); 6629 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 6630 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen); 6631 } 6632 /* 6633 * We add one here to keep the assoc from dis-appearing on 6634 * us. 6635 */ 6636 atomic_add_int(&stcb->asoc.refcnt, 1); 6637 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED); 6638 /* 6639 * sctp_abort_an_association calls sctp_free_asoc() free 6640 * association will NOT free it since we incremented the 6641 * refcnt .. we do this to prevent it being freed and things 6642 * getting tricky since we could end up (from free_asoc) 6643 * calling inpcb_free which would get a recursive lock call 6644 * to the iterator lock.. But as a consequence of that the 6645 * stcb will return to us un-locked.. since free_asoc 6646 * returns with either no TCB or the TCB unlocked, we must 6647 * relock.. to unlock in the iterator timer :-0 6648 */ 6649 SCTP_TCB_LOCK(stcb); 6650 atomic_add_int(&stcb->asoc.refcnt, -1); 6651 goto no_chunk_output; 6652 } else { 6653 if (m) { 6654 ret = sctp_msg_append(stcb, net, m, 6655 &ca->sndrcv, 1); 6656 } 6657 asoc = &stcb->asoc; 6658 if (ca->sndrcv.sinfo_flags & SCTP_EOF) { 6659 /* shutdown this assoc */ 6660 int cnt; 6661 6662 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED); 6663 6664 if (TAILQ_EMPTY(&asoc->send_queue) && 6665 TAILQ_EMPTY(&asoc->sent_queue) && 6666 (cnt == 0)) { 6667 if (asoc->locked_on_sending) { 6668 goto abort_anyway; 6669 } 6670 /* 6671 * there is nothing queued to send, so I'm 6672 * done... 6673 */ 6674 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 6675 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 6676 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 6677 /* 6678 * only send SHUTDOWN the first time 6679 * through 6680 */ 6681 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 6682 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 6683 } 6684 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 6685 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 6686 sctp_stop_timers_for_shutdown(stcb); 6687 sctp_send_shutdown(stcb, net); 6688 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 6689 net); 6690 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 6691 asoc->primary_destination); 6692 added_control = 1; 6693 do_chunk_output = 0; 6694 } 6695 } else { 6696 /* 6697 * we still got (or just got) data to send, 6698 * so set SHUTDOWN_PENDING 6699 */ 6700 /* 6701 * XXX sockets draft says that SCTP_EOF 6702 * should be sent with no data. currently, 6703 * we will allow user data to be sent first 6704 * and move to SHUTDOWN-PENDING 6705 */ 6706 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 6707 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 6708 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 6709 if (asoc->locked_on_sending) { 6710 /* 6711 * Locked to send out the 6712 * data 6713 */ 6714 struct sctp_stream_queue_pending *sp; 6715 6716 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 6717 if (sp) { 6718 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 6719 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 6720 } 6721 } 6722 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 6723 if (TAILQ_EMPTY(&asoc->send_queue) && 6724 TAILQ_EMPTY(&asoc->sent_queue) && 6725 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 6726 abort_anyway: 6727 atomic_add_int(&stcb->asoc.refcnt, 1); 6728 sctp_abort_an_association(stcb->sctp_ep, stcb, 6729 NULL, SCTP_SO_NOT_LOCKED); 6730 atomic_add_int(&stcb->asoc.refcnt, -1); 6731 goto no_chunk_output; 6732 } 6733 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 6734 asoc->primary_destination); 6735 } 6736 } 6737 6738 } 6739 } 6740 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 6741 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 6742 6743 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 6744 (stcb->asoc.total_flight > 0) && 6745 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 6746 do_chunk_output = 0; 6747 } 6748 if (do_chunk_output) 6749 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED); 6750 else if (added_control) { 6751 int num_out = 0, reason = 0, now_filled = 0; 6752 struct timeval now; 6753 int frag_point; 6754 6755 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 6756 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 6757 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED); 6758 } 6759no_chunk_output: 6760 if (ret) { 6761 ca->cnt_failed++; 6762 } else { 6763 ca->cnt_sent++; 6764 } 6765} 6766 6767static void 6768sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED) 6769{ 6770 struct sctp_copy_all *ca; 6771 6772 ca = (struct sctp_copy_all *)ptr; 6773 /* 6774 * Do a notify here? Kacheong suggests that the notify be done at 6775 * the send time.. so you would push up a notification if any send 6776 * failed. Don't know if this is feasable since the only failures we 6777 * have is "memory" related and if you cannot get an mbuf to send 6778 * the data you surely can't get an mbuf to send up to notify the 6779 * user you can't send the data :-> 6780 */ 6781 6782 /* now free everything */ 6783 sctp_m_freem(ca->m); 6784 SCTP_FREE(ca, SCTP_M_COPYAL); 6785} 6786 6787 6788#define MC_ALIGN(m, len) do { \ 6789 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \ 6790} while (0) 6791 6792 6793 6794static struct mbuf * 6795sctp_copy_out_all(struct uio *uio, int len) 6796{ 6797 struct mbuf *ret, *at; 6798 int left, willcpy, cancpy, error; 6799 6800 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA); 6801 if (ret == NULL) { 6802 /* TSNH */ 6803 return (NULL); 6804 } 6805 left = len; 6806 SCTP_BUF_LEN(ret) = 0; 6807 /* save space for the data chunk header */ 6808 cancpy = M_TRAILINGSPACE(ret); 6809 willcpy = min(cancpy, left); 6810 at = ret; 6811 while (left > 0) { 6812 /* Align data to the end */ 6813 error = uiomove(mtod(at, caddr_t), willcpy, uio); 6814 if (error) { 6815 err_out_now: 6816 sctp_m_freem(at); 6817 return (NULL); 6818 } 6819 SCTP_BUF_LEN(at) = willcpy; 6820 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0; 6821 left -= willcpy; 6822 if (left > 0) { 6823 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA); 6824 if (SCTP_BUF_NEXT(at) == NULL) { 6825 goto err_out_now; 6826 } 6827 at = SCTP_BUF_NEXT(at); 6828 SCTP_BUF_LEN(at) = 0; 6829 cancpy = M_TRAILINGSPACE(at); 6830 willcpy = min(cancpy, left); 6831 } 6832 } 6833 return (ret); 6834} 6835 6836static int 6837sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m, 6838 struct sctp_sndrcvinfo *srcv) 6839{ 6840 int ret; 6841 struct sctp_copy_all *ca; 6842 6843 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all), 6844 SCTP_M_COPYAL); 6845 if (ca == NULL) { 6846 sctp_m_freem(m); 6847 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6848 return (ENOMEM); 6849 } 6850 memset(ca, 0, sizeof(struct sctp_copy_all)); 6851 6852 ca->inp = inp; 6853 if (srcv) { 6854 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo)); 6855 } 6856 /* 6857 * take off the sendall flag, it would be bad if we failed to do 6858 * this :-0 6859 */ 6860 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL; 6861 /* get length and mbuf chain */ 6862 if (uio) { 6863 ca->sndlen = uio->uio_resid; 6864 ca->m = sctp_copy_out_all(uio, ca->sndlen); 6865 if (ca->m == NULL) { 6866 SCTP_FREE(ca, SCTP_M_COPYAL); 6867 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6868 return (ENOMEM); 6869 } 6870 } else { 6871 /* Gather the length of the send */ 6872 struct mbuf *mat; 6873 6874 ca->sndlen = 0; 6875 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) { 6876 ca->sndlen += SCTP_BUF_LEN(mat); 6877 } 6878 } 6879 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL, 6880 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES, 6881 SCTP_ASOC_ANY_STATE, 6882 (void *)ca, 0, 6883 sctp_sendall_completes, inp, 1); 6884 if (ret) { 6885 SCTP_PRINTF("Failed to initiate iterator for sendall\n"); 6886 SCTP_FREE(ca, SCTP_M_COPYAL); 6887 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); 6888 return (EFAULT); 6889 } 6890 return (0); 6891} 6892 6893 6894void 6895sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc) 6896{ 6897 struct sctp_tmit_chunk *chk, *nchk; 6898 6899 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 6900 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 6901 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 6902 if (chk->data) { 6903 sctp_m_freem(chk->data); 6904 chk->data = NULL; 6905 } 6906 asoc->ctrl_queue_cnt--; 6907 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6908 } 6909 } 6910} 6911 6912void 6913sctp_toss_old_asconf(struct sctp_tcb *stcb) 6914{ 6915 struct sctp_association *asoc; 6916 struct sctp_tmit_chunk *chk, *nchk; 6917 struct sctp_asconf_chunk *acp; 6918 6919 asoc = &stcb->asoc; 6920 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 6921 /* find SCTP_ASCONF chunk in queue */ 6922 if (chk->rec.chunk_id.id == SCTP_ASCONF) { 6923 if (chk->data) { 6924 acp = mtod(chk->data, struct sctp_asconf_chunk *); 6925 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) { 6926 /* Not Acked yet */ 6927 break; 6928 } 6929 } 6930 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 6931 if (chk->data) { 6932 sctp_m_freem(chk->data); 6933 chk->data = NULL; 6934 } 6935 asoc->ctrl_queue_cnt--; 6936 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6937 } 6938 } 6939} 6940 6941 6942static void 6943sctp_clean_up_datalist(struct sctp_tcb *stcb, 6944 struct sctp_association *asoc, 6945 struct sctp_tmit_chunk **data_list, 6946 int bundle_at, 6947 struct sctp_nets *net) 6948{ 6949 int i; 6950 struct sctp_tmit_chunk *tp1; 6951 6952 for (i = 0; i < bundle_at; i++) { 6953 /* off of the send queue */ 6954 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next); 6955 asoc->send_queue_cnt--; 6956 if (i > 0) { 6957 /* 6958 * Any chunk NOT 0 you zap the time chunk 0 gets 6959 * zapped or set based on if a RTO measurment is 6960 * needed. 6961 */ 6962 data_list[i]->do_rtt = 0; 6963 } 6964 /* record time */ 6965 data_list[i]->sent_rcv_time = net->last_sent_time; 6966 data_list[i]->rec.data.cwnd_at_send = net->cwnd; 6967 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq; 6968 if (data_list[i]->whoTo == NULL) { 6969 data_list[i]->whoTo = net; 6970 atomic_add_int(&net->ref_count, 1); 6971 } 6972 /* on to the sent queue */ 6973 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead); 6974 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { 6975 struct sctp_tmit_chunk *tpp; 6976 6977 /* need to move back */ 6978 back_up_more: 6979 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next); 6980 if (tpp == NULL) { 6981 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next); 6982 goto all_done; 6983 } 6984 tp1 = tpp; 6985 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { 6986 goto back_up_more; 6987 } 6988 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next); 6989 } else { 6990 TAILQ_INSERT_TAIL(&asoc->sent_queue, 6991 data_list[i], 6992 sctp_next); 6993 } 6994all_done: 6995 /* This does not lower until the cum-ack passes it */ 6996 asoc->sent_queue_cnt++; 6997 if ((asoc->peers_rwnd <= 0) && 6998 (asoc->total_flight == 0) && 6999 (bundle_at == 1)) { 7000 /* Mark the chunk as being a window probe */ 7001 SCTP_STAT_INCR(sctps_windowprobed); 7002 } 7003#ifdef SCTP_AUDITING_ENABLED 7004 sctp_audit_log(0xC2, 3); 7005#endif 7006 data_list[i]->sent = SCTP_DATAGRAM_SENT; 7007 data_list[i]->snd_count = 1; 7008 data_list[i]->rec.data.chunk_was_revoked = 0; 7009 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 7010 sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 7011 data_list[i]->whoTo->flight_size, 7012 data_list[i]->book_size, 7013 (uintptr_t) data_list[i]->whoTo, 7014 data_list[i]->rec.data.TSN_seq); 7015 } 7016 sctp_flight_size_increase(data_list[i]); 7017 sctp_total_flight_increase(stcb, data_list[i]); 7018 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { 7019 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 7020 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); 7021 } 7022 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 7023 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); 7024 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 7025 /* SWS sender side engages */ 7026 asoc->peers_rwnd = 0; 7027 } 7028 } 7029 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) { 7030 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net); 7031 } 7032} 7033 7034static void 7035sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked 7036#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7037 SCTP_UNUSED 7038#endif 7039) 7040{ 7041 struct sctp_tmit_chunk *chk, *nchk; 7042 7043 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 7044 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 7045 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ 7046 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 7047 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 7048 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) || 7049 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 7050 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 7051 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 7052 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 7053 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 7054 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 7055 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 7056 /* Stray chunks must be cleaned up */ 7057 clean_up_anyway: 7058 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 7059 if (chk->data) { 7060 sctp_m_freem(chk->data); 7061 chk->data = NULL; 7062 } 7063 asoc->ctrl_queue_cnt--; 7064 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) 7065 asoc->fwd_tsn_cnt--; 7066 sctp_free_a_chunk(stcb, chk, so_locked); 7067 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 7068 /* special handling, we must look into the param */ 7069 if (chk != asoc->str_reset) { 7070 goto clean_up_anyway; 7071 } 7072 } 7073 } 7074} 7075 7076 7077static int 7078sctp_can_we_split_this(struct sctp_tcb *stcb, 7079 uint32_t length, 7080 uint32_t goal_mtu, uint32_t frag_point, int eeor_on) 7081{ 7082 /* 7083 * Make a decision on if I should split a msg into multiple parts. 7084 * This is only asked of incomplete messages. 7085 */ 7086 if (eeor_on) { 7087 /* 7088 * If we are doing EEOR we need to always send it if its the 7089 * entire thing, since it might be all the guy is putting in 7090 * the hopper. 7091 */ 7092 if (goal_mtu >= length) { 7093 /*- 7094 * If we have data outstanding, 7095 * we get another chance when the sack 7096 * arrives to transmit - wait for more data 7097 */ 7098 if (stcb->asoc.total_flight == 0) { 7099 /* 7100 * If nothing is in flight, we zero the 7101 * packet counter. 7102 */ 7103 return (length); 7104 } 7105 return (0); 7106 7107 } else { 7108 /* You can fill the rest */ 7109 return (goal_mtu); 7110 } 7111 } 7112 /*- 7113 * For those strange folk that make the send buffer 7114 * smaller than our fragmentation point, we can't 7115 * get a full msg in so we have to allow splitting. 7116 */ 7117 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) { 7118 return (length); 7119 } 7120 if ((length <= goal_mtu) || 7121 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) { 7122 /* Sub-optimial residual don't split in non-eeor mode. */ 7123 return (0); 7124 } 7125 /* 7126 * If we reach here length is larger than the goal_mtu. Do we wish 7127 * to split it for the sake of packet putting together? 7128 */ 7129 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) { 7130 /* Its ok to split it */ 7131 return (min(goal_mtu, frag_point)); 7132 } 7133 /* Nope, can't split */ 7134 return (0); 7135 7136} 7137 7138static uint32_t 7139sctp_move_to_outqueue(struct sctp_tcb *stcb, 7140 struct sctp_stream_out *strq, 7141 uint32_t goal_mtu, 7142 uint32_t frag_point, 7143 int *locked, 7144 int *giveup, 7145 int eeor_mode, 7146 int *bail, 7147 int so_locked 7148#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7149 SCTP_UNUSED 7150#endif 7151) 7152{ 7153 /* Move from the stream to the send_queue keeping track of the total */ 7154 struct sctp_association *asoc; 7155 struct sctp_stream_queue_pending *sp; 7156 struct sctp_tmit_chunk *chk; 7157 struct sctp_data_chunk *dchkh; 7158 uint32_t to_move, length; 7159 uint8_t rcv_flags = 0; 7160 uint8_t some_taken; 7161 uint8_t send_lock_up = 0; 7162 7163 SCTP_TCB_LOCK_ASSERT(stcb); 7164 asoc = &stcb->asoc; 7165one_more_time: 7166 /* sa_ignore FREED_MEMORY */ 7167 sp = TAILQ_FIRST(&strq->outqueue); 7168 if (sp == NULL) { 7169 *locked = 0; 7170 if (send_lock_up == 0) { 7171 SCTP_TCB_SEND_LOCK(stcb); 7172 send_lock_up = 1; 7173 } 7174 sp = TAILQ_FIRST(&strq->outqueue); 7175 if (sp) { 7176 goto one_more_time; 7177 } 7178 if (strq->last_msg_incomplete) { 7179 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n", 7180 strq->stream_no, 7181 strq->last_msg_incomplete); 7182 strq->last_msg_incomplete = 0; 7183 } 7184 to_move = 0; 7185 if (send_lock_up) { 7186 SCTP_TCB_SEND_UNLOCK(stcb); 7187 send_lock_up = 0; 7188 } 7189 goto out_of; 7190 } 7191 if ((sp->msg_is_complete) && (sp->length == 0)) { 7192 if (sp->sender_all_done) { 7193 /* 7194 * We are doing differed cleanup. Last time through 7195 * when we took all the data the sender_all_done was 7196 * not set. 7197 */ 7198 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) { 7199 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n"); 7200 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 7201 sp->sender_all_done, 7202 sp->length, 7203 sp->msg_is_complete, 7204 sp->put_last_out, 7205 send_lock_up); 7206 } 7207 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) { 7208 SCTP_TCB_SEND_LOCK(stcb); 7209 send_lock_up = 1; 7210 } 7211 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 7212 TAILQ_REMOVE(&strq->outqueue, sp, next); 7213 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); 7214 if (sp->net) { 7215 sctp_free_remote_addr(sp->net); 7216 sp->net = NULL; 7217 } 7218 if (sp->data) { 7219 sctp_m_freem(sp->data); 7220 sp->data = NULL; 7221 } 7222 sctp_free_a_strmoq(stcb, sp, so_locked); 7223 /* we can't be locked to it */ 7224 *locked = 0; 7225 stcb->asoc.locked_on_sending = NULL; 7226 if (send_lock_up) { 7227 SCTP_TCB_SEND_UNLOCK(stcb); 7228 send_lock_up = 0; 7229 } 7230 /* back to get the next msg */ 7231 goto one_more_time; 7232 } else { 7233 /* 7234 * sender just finished this but still holds a 7235 * reference 7236 */ 7237 *locked = 1; 7238 *giveup = 1; 7239 to_move = 0; 7240 goto out_of; 7241 } 7242 } else { 7243 /* is there some to get */ 7244 if (sp->length == 0) { 7245 /* no */ 7246 *locked = 1; 7247 *giveup = 1; 7248 to_move = 0; 7249 goto out_of; 7250 } else if (sp->discard_rest) { 7251 if (send_lock_up == 0) { 7252 SCTP_TCB_SEND_LOCK(stcb); 7253 send_lock_up = 1; 7254 } 7255 /* Whack down the size */ 7256 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length); 7257 if ((stcb->sctp_socket != NULL) && \ 7258 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 7259 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { 7260 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length); 7261 } 7262 if (sp->data) { 7263 sctp_m_freem(sp->data); 7264 sp->data = NULL; 7265 sp->tail_mbuf = NULL; 7266 } 7267 sp->length = 0; 7268 sp->some_taken = 1; 7269 *locked = 1; 7270 *giveup = 1; 7271 to_move = 0; 7272 goto out_of; 7273 } 7274 } 7275 some_taken = sp->some_taken; 7276 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) { 7277 sp->msg_is_complete = 1; 7278 } 7279re_look: 7280 length = sp->length; 7281 if (sp->msg_is_complete) { 7282 /* The message is complete */ 7283 to_move = min(length, frag_point); 7284 if (to_move == length) { 7285 /* All of it fits in the MTU */ 7286 if (sp->some_taken) { 7287 rcv_flags |= SCTP_DATA_LAST_FRAG; 7288 sp->put_last_out = 1; 7289 } else { 7290 rcv_flags |= SCTP_DATA_NOT_FRAG; 7291 sp->put_last_out = 1; 7292 } 7293 } else { 7294 /* Not all of it fits, we fragment */ 7295 if (sp->some_taken == 0) { 7296 rcv_flags |= SCTP_DATA_FIRST_FRAG; 7297 } 7298 sp->some_taken = 1; 7299 } 7300 } else { 7301 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode); 7302 if (to_move) { 7303 /*- 7304 * We use a snapshot of length in case it 7305 * is expanding during the compare. 7306 */ 7307 uint32_t llen; 7308 7309 llen = length; 7310 if (to_move >= llen) { 7311 to_move = llen; 7312 if (send_lock_up == 0) { 7313 /*- 7314 * We are taking all of an incomplete msg 7315 * thus we need a send lock. 7316 */ 7317 SCTP_TCB_SEND_LOCK(stcb); 7318 send_lock_up = 1; 7319 if (sp->msg_is_complete) { 7320 /* 7321 * the sender finished the 7322 * msg 7323 */ 7324 goto re_look; 7325 } 7326 } 7327 } 7328 if (sp->some_taken == 0) { 7329 rcv_flags |= SCTP_DATA_FIRST_FRAG; 7330 sp->some_taken = 1; 7331 } 7332 } else { 7333 /* Nothing to take. */ 7334 if (sp->some_taken) { 7335 *locked = 1; 7336 } 7337 *giveup = 1; 7338 to_move = 0; 7339 goto out_of; 7340 } 7341 } 7342 7343 /* If we reach here, we can copy out a chunk */ 7344 sctp_alloc_a_chunk(stcb, chk); 7345 if (chk == NULL) { 7346 /* No chunk memory */ 7347 *giveup = 1; 7348 to_move = 0; 7349 goto out_of; 7350 } 7351 /* 7352 * Setup for unordered if needed by looking at the user sent info 7353 * flags. 7354 */ 7355 if (sp->sinfo_flags & SCTP_UNORDERED) { 7356 rcv_flags |= SCTP_DATA_UNORDERED; 7357 } 7358 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) || 7359 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) { 7360 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY; 7361 } 7362 /* clear out the chunk before setting up */ 7363 memset(chk, 0, sizeof(*chk)); 7364 chk->rec.data.rcv_flags = rcv_flags; 7365 7366 if (to_move >= length) { 7367 /* we think we can steal the whole thing */ 7368 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) { 7369 SCTP_TCB_SEND_LOCK(stcb); 7370 send_lock_up = 1; 7371 } 7372 if (to_move < sp->length) { 7373 /* bail, it changed */ 7374 goto dont_do_it; 7375 } 7376 chk->data = sp->data; 7377 chk->last_mbuf = sp->tail_mbuf; 7378 /* register the stealing */ 7379 sp->data = sp->tail_mbuf = NULL; 7380 } else { 7381 struct mbuf *m; 7382 7383dont_do_it: 7384 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT); 7385 chk->last_mbuf = NULL; 7386 if (chk->data == NULL) { 7387 sp->some_taken = some_taken; 7388 sctp_free_a_chunk(stcb, chk, so_locked); 7389 *bail = 1; 7390 to_move = 0; 7391 goto out_of; 7392 } 7393#ifdef SCTP_MBUF_LOGGING 7394 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 7395 struct mbuf *mat; 7396 7397 for (mat = chk->data; mat; mat = SCTP_BUF_NEXT(mat)) { 7398 if (SCTP_BUF_IS_EXTENDED(mat)) { 7399 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 7400 } 7401 } 7402 } 7403#endif 7404 /* Pull off the data */ 7405 m_adj(sp->data, to_move); 7406 /* Now lets work our way down and compact it */ 7407 m = sp->data; 7408 while (m && (SCTP_BUF_LEN(m) == 0)) { 7409 sp->data = SCTP_BUF_NEXT(m); 7410 SCTP_BUF_NEXT(m) = NULL; 7411 if (sp->tail_mbuf == m) { 7412 /*- 7413 * Freeing tail? TSNH since 7414 * we supposedly were taking less 7415 * than the sp->length. 7416 */ 7417#ifdef INVARIANTS 7418 panic("Huh, freing tail? - TSNH"); 7419#else 7420 SCTP_PRINTF("Huh, freeing tail? - TSNH\n"); 7421 sp->tail_mbuf = sp->data = NULL; 7422 sp->length = 0; 7423#endif 7424 7425 } 7426 sctp_m_free(m); 7427 m = sp->data; 7428 } 7429 } 7430 if (SCTP_BUF_IS_EXTENDED(chk->data)) { 7431 chk->copy_by_ref = 1; 7432 } else { 7433 chk->copy_by_ref = 0; 7434 } 7435 /* 7436 * get last_mbuf and counts of mb useage This is ugly but hopefully 7437 * its only one mbuf. 7438 */ 7439 if (chk->last_mbuf == NULL) { 7440 chk->last_mbuf = chk->data; 7441 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) { 7442 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf); 7443 } 7444 } 7445 if (to_move > length) { 7446 /*- This should not happen either 7447 * since we always lower to_move to the size 7448 * of sp->length if its larger. 7449 */ 7450#ifdef INVARIANTS 7451 panic("Huh, how can to_move be larger?"); 7452#else 7453 SCTP_PRINTF("Huh, how can to_move be larger?\n"); 7454 sp->length = 0; 7455#endif 7456 } else { 7457 atomic_subtract_int(&sp->length, to_move); 7458 } 7459 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) { 7460 /* Not enough room for a chunk header, get some */ 7461 struct mbuf *m; 7462 7463 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA); 7464 if (m == NULL) { 7465 /* 7466 * we're in trouble here. _PREPEND below will free 7467 * all the data if there is no leading space, so we 7468 * must put the data back and restore. 7469 */ 7470 if (send_lock_up == 0) { 7471 SCTP_TCB_SEND_LOCK(stcb); 7472 send_lock_up = 1; 7473 } 7474 if (chk->data == NULL) { 7475 /* unsteal the data */ 7476 sp->data = chk->data; 7477 sp->tail_mbuf = chk->last_mbuf; 7478 } else { 7479 struct mbuf *m_tmp; 7480 7481 /* reassemble the data */ 7482 m_tmp = sp->data; 7483 sp->data = chk->data; 7484 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp; 7485 } 7486 sp->some_taken = some_taken; 7487 atomic_add_int(&sp->length, to_move); 7488 chk->data = NULL; 7489 *bail = 1; 7490 sctp_free_a_chunk(stcb, chk, so_locked); 7491 to_move = 0; 7492 goto out_of; 7493 } else { 7494 SCTP_BUF_LEN(m) = 0; 7495 SCTP_BUF_NEXT(m) = chk->data; 7496 chk->data = m; 7497 M_ALIGN(chk->data, 4); 7498 } 7499 } 7500 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT); 7501 if (chk->data == NULL) { 7502 /* HELP, TSNH since we assured it would not above? */ 7503#ifdef INVARIANTS 7504 panic("prepend failes HELP?"); 7505#else 7506 SCTP_PRINTF("prepend fails HELP?\n"); 7507 sctp_free_a_chunk(stcb, chk, so_locked); 7508#endif 7509 *bail = 1; 7510 to_move = 0; 7511 goto out_of; 7512 } 7513 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk)); 7514 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk)); 7515 chk->book_size_scale = 0; 7516 chk->sent = SCTP_DATAGRAM_UNSENT; 7517 7518 chk->flags = 0; 7519 chk->asoc = &stcb->asoc; 7520 chk->pad_inplace = 0; 7521 chk->no_fr_allowed = 0; 7522 chk->rec.data.stream_seq = strq->next_sequence_send; 7523 if ((rcv_flags & SCTP_DATA_LAST_FRAG) && 7524 !(rcv_flags & SCTP_DATA_UNORDERED)) { 7525 strq->next_sequence_send++; 7526 } 7527 chk->rec.data.stream_number = sp->stream; 7528 chk->rec.data.payloadtype = sp->ppid; 7529 chk->rec.data.context = sp->context; 7530 chk->rec.data.doing_fast_retransmit = 0; 7531 7532 chk->rec.data.timetodrop = sp->ts; 7533 chk->flags = sp->act_flags; 7534 7535 if (sp->net) { 7536 chk->whoTo = sp->net; 7537 atomic_add_int(&chk->whoTo->ref_count, 1); 7538 } else 7539 chk->whoTo = NULL; 7540 7541 if (sp->holds_key_ref) { 7542 chk->auth_keyid = sp->auth_keyid; 7543 sctp_auth_key_acquire(stcb, chk->auth_keyid); 7544 chk->holds_key_ref = 1; 7545 } 7546 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1); 7547 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) { 7548 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND, 7549 (uintptr_t) stcb, sp->length, 7550 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq), 7551 chk->rec.data.TSN_seq); 7552 } 7553 dchkh = mtod(chk->data, struct sctp_data_chunk *); 7554 /* 7555 * Put the rest of the things in place now. Size was done earlier in 7556 * previous loop prior to padding. 7557 */ 7558 7559#ifdef SCTP_ASOCLOG_OF_TSNS 7560 SCTP_TCB_LOCK_ASSERT(stcb); 7561 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) { 7562 asoc->tsn_out_at = 0; 7563 asoc->tsn_out_wrapped = 1; 7564 } 7565 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq; 7566 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number; 7567 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq; 7568 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size; 7569 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags; 7570 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb; 7571 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at; 7572 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2; 7573 asoc->tsn_out_at++; 7574#endif 7575 7576 dchkh->ch.chunk_type = SCTP_DATA; 7577 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags; 7578 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq); 7579 dchkh->dp.stream_id = htons(strq->stream_no); 7580 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq); 7581 dchkh->dp.protocol_id = chk->rec.data.payloadtype; 7582 dchkh->ch.chunk_length = htons(chk->send_size); 7583 /* Now advance the chk->send_size by the actual pad needed. */ 7584 if (chk->send_size < SCTP_SIZE32(chk->book_size)) { 7585 /* need a pad */ 7586 struct mbuf *lm; 7587 int pads; 7588 7589 pads = SCTP_SIZE32(chk->book_size) - chk->send_size; 7590 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf); 7591 if (lm != NULL) { 7592 chk->last_mbuf = lm; 7593 chk->pad_inplace = 1; 7594 } 7595 chk->send_size += pads; 7596 } 7597 if (PR_SCTP_ENABLED(chk->flags)) { 7598 asoc->pr_sctp_cnt++; 7599 } 7600 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) { 7601 /* All done pull and kill the message */ 7602 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 7603 if (sp->put_last_out == 0) { 7604 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n"); 7605 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 7606 sp->sender_all_done, 7607 sp->length, 7608 sp->msg_is_complete, 7609 sp->put_last_out, 7610 send_lock_up); 7611 } 7612 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) { 7613 SCTP_TCB_SEND_LOCK(stcb); 7614 send_lock_up = 1; 7615 } 7616 TAILQ_REMOVE(&strq->outqueue, sp, next); 7617 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); 7618 if (sp->net) { 7619 sctp_free_remote_addr(sp->net); 7620 sp->net = NULL; 7621 } 7622 if (sp->data) { 7623 sctp_m_freem(sp->data); 7624 sp->data = NULL; 7625 } 7626 sctp_free_a_strmoq(stcb, sp, so_locked); 7627 7628 /* we can't be locked to it */ 7629 *locked = 0; 7630 stcb->asoc.locked_on_sending = NULL; 7631 } else { 7632 /* more to go, we are locked */ 7633 *locked = 1; 7634 } 7635 asoc->chunks_on_out_queue++; 7636 strq->chunks_on_queues++; 7637 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next); 7638 asoc->send_queue_cnt++; 7639out_of: 7640 if (send_lock_up) { 7641 SCTP_TCB_SEND_UNLOCK(stcb); 7642 } 7643 return (to_move); 7644} 7645 7646 7647static void 7648sctp_fill_outqueue(struct sctp_tcb *stcb, 7649 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked 7650#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7651 SCTP_UNUSED 7652#endif 7653) 7654{ 7655 struct sctp_association *asoc; 7656 struct sctp_stream_out *strq; 7657 int goal_mtu, moved_how_much, total_moved = 0, bail = 0; 7658 int locked, giveup; 7659 7660 SCTP_TCB_LOCK_ASSERT(stcb); 7661 asoc = &stcb->asoc; 7662 switch (net->ro._l_addr.sa.sa_family) { 7663#ifdef INET 7664 case AF_INET: 7665 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 7666 break; 7667#endif 7668#ifdef INET6 7669 case AF_INET6: 7670 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD; 7671 break; 7672#endif 7673 default: 7674 /* TSNH */ 7675 goal_mtu = net->mtu; 7676 break; 7677 } 7678 /* Need an allowance for the data chunk header too */ 7679 goal_mtu -= sizeof(struct sctp_data_chunk); 7680 7681 /* must make even word boundary */ 7682 goal_mtu &= 0xfffffffc; 7683 if (asoc->locked_on_sending) { 7684 /* We are stuck on one stream until the message completes. */ 7685 strq = asoc->locked_on_sending; 7686 locked = 1; 7687 } else { 7688 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); 7689 locked = 0; 7690 } 7691 while ((goal_mtu > 0) && strq) { 7692 giveup = 0; 7693 bail = 0; 7694 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked, 7695 &giveup, eeor_mode, &bail, so_locked); 7696 if (moved_how_much) 7697 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much); 7698 7699 if (locked) { 7700 asoc->locked_on_sending = strq; 7701 if ((moved_how_much == 0) || (giveup) || bail) 7702 /* no more to move for now */ 7703 break; 7704 } else { 7705 asoc->locked_on_sending = NULL; 7706 if ((giveup) || bail) { 7707 break; 7708 } 7709 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); 7710 if (strq == NULL) { 7711 break; 7712 } 7713 } 7714 total_moved += moved_how_much; 7715 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk)); 7716 goal_mtu &= 0xfffffffc; 7717 } 7718 if (bail) 7719 *quit_now = 1; 7720 7721 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc); 7722 7723 if (total_moved == 0) { 7724 if ((stcb->asoc.sctp_cmt_on_off == 0) && 7725 (net == stcb->asoc.primary_destination)) { 7726 /* ran dry for primary network net */ 7727 SCTP_STAT_INCR(sctps_primary_randry); 7728 } else if (stcb->asoc.sctp_cmt_on_off > 0) { 7729 /* ran dry with CMT on */ 7730 SCTP_STAT_INCR(sctps_cmt_randry); 7731 } 7732 } 7733} 7734 7735void 7736sctp_fix_ecn_echo(struct sctp_association *asoc) 7737{ 7738 struct sctp_tmit_chunk *chk; 7739 7740 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7741 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 7742 chk->sent = SCTP_DATAGRAM_UNSENT; 7743 } 7744 } 7745} 7746 7747void 7748sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net) 7749{ 7750 struct sctp_association *asoc; 7751 struct sctp_tmit_chunk *chk; 7752 struct sctp_stream_queue_pending *sp; 7753 unsigned int i; 7754 7755 if (net == NULL) { 7756 return; 7757 } 7758 asoc = &stcb->asoc; 7759 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 7760 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { 7761 if (sp->net == net) { 7762 sctp_free_remote_addr(sp->net); 7763 sp->net = NULL; 7764 } 7765 } 7766 } 7767 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 7768 if (chk->whoTo == net) { 7769 sctp_free_remote_addr(chk->whoTo); 7770 chk->whoTo = NULL; 7771 } 7772 } 7773} 7774 7775int 7776sctp_med_chunk_output(struct sctp_inpcb *inp, 7777 struct sctp_tcb *stcb, 7778 struct sctp_association *asoc, 7779 int *num_out, 7780 int *reason_code, 7781 int control_only, int from_where, 7782 struct timeval *now, int *now_filled, int frag_point, int so_locked 7783#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7784 SCTP_UNUSED 7785#endif 7786) 7787{ 7788 /** 7789 * Ok this is the generic chunk service queue. we must do the 7790 * following: - Service the stream queue that is next, moving any 7791 * message (note I must get a complete message i.e. FIRST/MIDDLE and 7792 * LAST to the out queue in one pass) and assigning TSN's - Check to 7793 * see if the cwnd/rwnd allows any output, if so we go ahead and 7794 * fomulate and send the low level chunks. Making sure to combine 7795 * any control in the control chunk queue also. 7796 */ 7797 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL; 7798 struct mbuf *outchain, *endoutchain; 7799 struct sctp_tmit_chunk *chk, *nchk; 7800 7801 /* temp arrays for unlinking */ 7802 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 7803 int no_fragmentflg, error; 7804 unsigned int max_rwnd_per_dest, max_send_per_dest; 7805 int one_chunk, hbflag, skip_data_for_this_net; 7806 int asconf, cookie, no_out_cnt; 7807 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode; 7808 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out; 7809 int tsns_sent = 0; 7810 uint32_t auth_offset = 0; 7811 struct sctp_auth_chunk *auth = NULL; 7812 uint16_t auth_keyid; 7813 int override_ok = 1; 7814 int skip_fill_up = 0; 7815 int data_auth_reqd = 0; 7816 7817 /* 7818 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the 7819 * destination. 7820 */ 7821 int quit_now = 0; 7822 7823 *num_out = 0; 7824 auth_keyid = stcb->asoc.authinfo.active_keyid; 7825 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) || 7826 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) || 7827 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { 7828 eeor_mode = 1; 7829 } else { 7830 eeor_mode = 0; 7831 } 7832 ctl_cnt = no_out_cnt = asconf = cookie = 0; 7833 /* 7834 * First lets prime the pump. For each destination, if there is room 7835 * in the flight size, attempt to pull an MTU's worth out of the 7836 * stream queues into the general send_queue 7837 */ 7838#ifdef SCTP_AUDITING_ENABLED 7839 sctp_audit_log(0xC2, 2); 7840#endif 7841 SCTP_TCB_LOCK_ASSERT(stcb); 7842 hbflag = 0; 7843 if ((control_only) || (asoc->stream_reset_outstanding)) 7844 no_data_chunks = 1; 7845 else 7846 no_data_chunks = 0; 7847 7848 /* Nothing to possible to send? */ 7849 if ((TAILQ_EMPTY(&asoc->control_send_queue) || 7850 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) && 7851 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7852 TAILQ_EMPTY(&asoc->send_queue) && 7853 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { 7854nothing_to_send: 7855 *reason_code = 9; 7856 return (0); 7857 } 7858 if (asoc->peers_rwnd == 0) { 7859 /* No room in peers rwnd */ 7860 *reason_code = 1; 7861 if (asoc->total_flight > 0) { 7862 /* we are allowed one chunk in flight */ 7863 no_data_chunks = 1; 7864 } 7865 } 7866 if (stcb->asoc.ecn_echo_cnt_onq) { 7867 /* Record where a sack goes, if any */ 7868 if (no_data_chunks && 7869 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) { 7870 /* Nothing but ECNe to send - we don't do that */ 7871 goto nothing_to_send; 7872 } 7873 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7874 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 7875 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { 7876 sack_goes_to = chk->whoTo; 7877 break; 7878 } 7879 } 7880 } 7881 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets); 7882 if (stcb->sctp_socket) 7883 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets; 7884 else 7885 max_send_per_dest = 0; 7886 if (no_data_chunks == 0) { 7887 /* How many non-directed chunks are there? */ 7888 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 7889 if (chk->whoTo == NULL) { 7890 /* 7891 * We already have non-directed chunks on 7892 * the queue, no need to do a fill-up. 7893 */ 7894 skip_fill_up = 1; 7895 break; 7896 } 7897 } 7898 7899 } 7900 if ((no_data_chunks == 0) && 7901 (skip_fill_up == 0) && 7902 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) { 7903 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 7904 /* 7905 * This for loop we are in takes in each net, if 7906 * its's got space in cwnd and has data sent to it 7907 * (when CMT is off) then it calls 7908 * sctp_fill_outqueue for the net. This gets data on 7909 * the send queue for that network. 7910 * 7911 * In sctp_fill_outqueue TSN's are assigned and data is 7912 * copied out of the stream buffers. Note mostly 7913 * copy by reference (we hope). 7914 */ 7915 net->window_probe = 0; 7916 if ((net != stcb->asoc.alternate) && 7917 ((net->dest_state & SCTP_ADDR_PF) || 7918 (!(net->dest_state & SCTP_ADDR_REACHABLE)) || 7919 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) { 7920 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7921 sctp_log_cwnd(stcb, net, 1, 7922 SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7923 } 7924 continue; 7925 } 7926 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && 7927 (net->flight_size == 0)) { 7928 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net); 7929 } 7930 if (net->flight_size >= net->cwnd) { 7931 /* skip this network, no room - can't fill */ 7932 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7933 sctp_log_cwnd(stcb, net, 3, 7934 SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7935 } 7936 continue; 7937 } 7938 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7939 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7940 } 7941 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked); 7942 if (quit_now) { 7943 /* memory alloc failure */ 7944 no_data_chunks = 1; 7945 break; 7946 } 7947 } 7948 } 7949 /* now service each destination and send out what we can for it */ 7950 /* Nothing to send? */ 7951 if (TAILQ_EMPTY(&asoc->control_send_queue) && 7952 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7953 TAILQ_EMPTY(&asoc->send_queue)) { 7954 *reason_code = 8; 7955 return (0); 7956 } 7957 if (asoc->sctp_cmt_on_off > 0) { 7958 /* get the last start point */ 7959 start_at = asoc->last_net_cmt_send_started; 7960 if (start_at == NULL) { 7961 /* null so to beginning */ 7962 start_at = TAILQ_FIRST(&asoc->nets); 7963 } else { 7964 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next); 7965 if (start_at == NULL) { 7966 start_at = TAILQ_FIRST(&asoc->nets); 7967 } 7968 } 7969 asoc->last_net_cmt_send_started = start_at; 7970 } else { 7971 start_at = TAILQ_FIRST(&asoc->nets); 7972 } 7973 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7974 if (chk->whoTo == NULL) { 7975 if (asoc->alternate) { 7976 chk->whoTo = asoc->alternate; 7977 } else { 7978 chk->whoTo = asoc->primary_destination; 7979 } 7980 atomic_add_int(&chk->whoTo->ref_count, 1); 7981 } 7982 } 7983 old_start_at = NULL; 7984again_one_more_time: 7985 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) { 7986 /* how much can we send? */ 7987 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */ 7988 if (old_start_at && (old_start_at == net)) { 7989 /* through list ocmpletely. */ 7990 break; 7991 } 7992 tsns_sent = 0xa; 7993 if (TAILQ_EMPTY(&asoc->control_send_queue) && 7994 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7995 (net->flight_size >= net->cwnd)) { 7996 /* 7997 * Nothing on control or asconf and flight is full, 7998 * we can skip even in the CMT case. 7999 */ 8000 continue; 8001 } 8002 bundle_at = 0; 8003 endoutchain = outchain = NULL; 8004 no_fragmentflg = 1; 8005 one_chunk = 0; 8006 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 8007 skip_data_for_this_net = 1; 8008 } else { 8009 skip_data_for_this_net = 0; 8010 } 8011 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) { 8012 /* 8013 * if we have a route and an ifp check to see if we 8014 * have room to send to this guy 8015 */ 8016 struct ifnet *ifp; 8017 8018 ifp = net->ro.ro_rt->rt_ifp; 8019 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) { 8020 SCTP_STAT_INCR(sctps_ifnomemqueued); 8021 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 8022 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED); 8023 } 8024 continue; 8025 } 8026 } 8027 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { 8028#ifdef INET 8029 case AF_INET: 8030 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr)); 8031 break; 8032#endif 8033#ifdef INET6 8034 case AF_INET6: 8035 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)); 8036 break; 8037#endif 8038 default: 8039 /* TSNH */ 8040 mtu = net->mtu; 8041 break; 8042 } 8043 mx_mtu = mtu; 8044 to_out = 0; 8045 if (mtu > asoc->peers_rwnd) { 8046 if (asoc->total_flight > 0) { 8047 /* We have a packet in flight somewhere */ 8048 r_mtu = asoc->peers_rwnd; 8049 } else { 8050 /* We are always allowed to send one MTU out */ 8051 one_chunk = 1; 8052 r_mtu = mtu; 8053 } 8054 } else { 8055 r_mtu = mtu; 8056 } 8057 /************************/ 8058 /* ASCONF transmission */ 8059 /************************/ 8060 /* Now first lets go through the asconf queue */ 8061 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 8062 if (chk->rec.chunk_id.id != SCTP_ASCONF) { 8063 continue; 8064 } 8065 if (chk->whoTo == NULL) { 8066 if (asoc->alternate == NULL) { 8067 if (asoc->primary_destination != net) { 8068 break; 8069 } 8070 } else { 8071 if (asoc->alternate != net) { 8072 break; 8073 } 8074 } 8075 } else { 8076 if (chk->whoTo != net) { 8077 break; 8078 } 8079 } 8080 if (chk->data == NULL) { 8081 break; 8082 } 8083 if (chk->sent != SCTP_DATAGRAM_UNSENT && 8084 chk->sent != SCTP_DATAGRAM_RESEND) { 8085 break; 8086 } 8087 /* 8088 * if no AUTH is yet included and this chunk 8089 * requires it, make sure to account for it. We 8090 * don't apply the size until the AUTH chunk is 8091 * actually added below in case there is no room for 8092 * this chunk. NOTE: we overload the use of "omtu" 8093 * here 8094 */ 8095 if ((auth == NULL) && 8096 sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8097 stcb->asoc.peer_auth_chunks)) { 8098 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8099 } else 8100 omtu = 0; 8101 /* Here we do NOT factor the r_mtu */ 8102 if ((chk->send_size < (int)(mtu - omtu)) || 8103 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 8104 /* 8105 * We probably should glom the mbuf chain 8106 * from the chk->data for control but the 8107 * problem is it becomes yet one more level 8108 * of tracking to do if for some reason 8109 * output fails. Then I have got to 8110 * reconstruct the merged control chain.. el 8111 * yucko.. for now we take the easy way and 8112 * do the copy 8113 */ 8114 /* 8115 * Add an AUTH chunk, if chunk requires it 8116 * save the offset into the chain for AUTH 8117 */ 8118 if ((auth == NULL) && 8119 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8120 stcb->asoc.peer_auth_chunks))) { 8121 outchain = sctp_add_auth_chunk(outchain, 8122 &endoutchain, 8123 &auth, 8124 &auth_offset, 8125 stcb, 8126 chk->rec.chunk_id.id); 8127 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8128 } 8129 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 8130 (int)chk->rec.chunk_id.can_take_data, 8131 chk->send_size, chk->copy_by_ref); 8132 if (outchain == NULL) { 8133 *reason_code = 8; 8134 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8135 return (ENOMEM); 8136 } 8137 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8138 /* update our MTU size */ 8139 if (mtu > (chk->send_size + omtu)) 8140 mtu -= (chk->send_size + omtu); 8141 else 8142 mtu = 0; 8143 to_out += (chk->send_size + omtu); 8144 /* Do clear IP_DF ? */ 8145 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8146 no_fragmentflg = 0; 8147 } 8148 if (chk->rec.chunk_id.can_take_data) 8149 chk->data = NULL; 8150 /* 8151 * set hb flag since we can use these for 8152 * RTO 8153 */ 8154 hbflag = 1; 8155 asconf = 1; 8156 /* 8157 * should sysctl this: don't bundle data 8158 * with ASCONF since it requires AUTH 8159 */ 8160 no_data_chunks = 1; 8161 chk->sent = SCTP_DATAGRAM_SENT; 8162 if (chk->whoTo == NULL) { 8163 chk->whoTo = net; 8164 atomic_add_int(&net->ref_count, 1); 8165 } 8166 chk->snd_count++; 8167 if (mtu == 0) { 8168 /* 8169 * Ok we are out of room but we can 8170 * output without effecting the 8171 * flight size since this little guy 8172 * is a control only packet. 8173 */ 8174 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 8175 /* 8176 * do NOT clear the asconf flag as 8177 * it is used to do appropriate 8178 * source address selection. 8179 */ 8180 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 8181 (struct sockaddr *)&net->ro._l_addr, 8182 outchain, auth_offset, auth, 8183 stcb->asoc.authinfo.active_keyid, 8184 no_fragmentflg, 0, asconf, 8185 inp->sctp_lport, stcb->rport, 8186 htonl(stcb->asoc.peer_vtag), 8187 net->port, NULL, 8188 0, 0, 8189 so_locked))) { 8190 if (error == ENOBUFS) { 8191 asoc->ifp_had_enobuf = 1; 8192 SCTP_STAT_INCR(sctps_lowlevelerr); 8193 } 8194 if (from_where == 0) { 8195 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8196 } 8197 if (*now_filled == 0) { 8198 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8199 *now_filled = 1; 8200 *now = net->last_sent_time; 8201 } else { 8202 net->last_sent_time = *now; 8203 } 8204 hbflag = 0; 8205 /* error, could not output */ 8206 if (error == EHOSTUNREACH) { 8207 /* 8208 * Destination went 8209 * unreachable 8210 * during this send 8211 */ 8212 sctp_move_chunks_from_net(stcb, net); 8213 } 8214 *reason_code = 7; 8215 continue; 8216 } else 8217 asoc->ifp_had_enobuf = 0; 8218 if (*now_filled == 0) { 8219 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8220 *now_filled = 1; 8221 *now = net->last_sent_time; 8222 } else { 8223 net->last_sent_time = *now; 8224 } 8225 hbflag = 0; 8226 /* 8227 * increase the number we sent, if a 8228 * cookie is sent we don't tell them 8229 * any was sent out. 8230 */ 8231 outchain = endoutchain = NULL; 8232 auth = NULL; 8233 auth_offset = 0; 8234 if (!no_out_cnt) 8235 *num_out += ctl_cnt; 8236 /* recalc a clean slate and setup */ 8237 switch (net->ro._l_addr.sa.sa_family) { 8238#ifdef INET 8239 case AF_INET: 8240 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8241 break; 8242#endif 8243#ifdef INET6 8244 case AF_INET6: 8245 mtu = net->mtu - SCTP_MIN_OVERHEAD; 8246 break; 8247#endif 8248 default: 8249 /* TSNH */ 8250 mtu = net->mtu; 8251 break; 8252 } 8253 to_out = 0; 8254 no_fragmentflg = 1; 8255 } 8256 } 8257 } 8258 /************************/ 8259 /* Control transmission */ 8260 /************************/ 8261 /* Now first lets go through the control queue */ 8262 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 8263 if ((sack_goes_to) && 8264 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) && 8265 (chk->whoTo != sack_goes_to)) { 8266 /* 8267 * if we have a sack in queue, and we are 8268 * looking at an ecn echo that is NOT queued 8269 * to where the sack is going.. 8270 */ 8271 if (chk->whoTo == net) { 8272 /* 8273 * Don't transmit it to where its 8274 * going (current net) 8275 */ 8276 continue; 8277 } else if (sack_goes_to == net) { 8278 /* 8279 * But do transmit it to this 8280 * address 8281 */ 8282 goto skip_net_check; 8283 } 8284 } 8285 if (chk->whoTo == NULL) { 8286 if (asoc->alternate == NULL) { 8287 if (asoc->primary_destination != net) { 8288 continue; 8289 } 8290 } else { 8291 if (asoc->alternate != net) { 8292 continue; 8293 } 8294 } 8295 } else { 8296 if (chk->whoTo != net) { 8297 continue; 8298 } 8299 } 8300 skip_net_check: 8301 if (chk->data == NULL) { 8302 continue; 8303 } 8304 if (chk->sent != SCTP_DATAGRAM_UNSENT) { 8305 /* 8306 * It must be unsent. Cookies and ASCONF's 8307 * hang around but there timers will force 8308 * when marked for resend. 8309 */ 8310 continue; 8311 } 8312 /* 8313 * if no AUTH is yet included and this chunk 8314 * requires it, make sure to account for it. We 8315 * don't apply the size until the AUTH chunk is 8316 * actually added below in case there is no room for 8317 * this chunk. NOTE: we overload the use of "omtu" 8318 * here 8319 */ 8320 if ((auth == NULL) && 8321 sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8322 stcb->asoc.peer_auth_chunks)) { 8323 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8324 } else 8325 omtu = 0; 8326 /* Here we do NOT factor the r_mtu */ 8327 if ((chk->send_size <= (int)(mtu - omtu)) || 8328 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 8329 /* 8330 * We probably should glom the mbuf chain 8331 * from the chk->data for control but the 8332 * problem is it becomes yet one more level 8333 * of tracking to do if for some reason 8334 * output fails. Then I have got to 8335 * reconstruct the merged control chain.. el 8336 * yucko.. for now we take the easy way and 8337 * do the copy 8338 */ 8339 /* 8340 * Add an AUTH chunk, if chunk requires it 8341 * save the offset into the chain for AUTH 8342 */ 8343 if ((auth == NULL) && 8344 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8345 stcb->asoc.peer_auth_chunks))) { 8346 outchain = sctp_add_auth_chunk(outchain, 8347 &endoutchain, 8348 &auth, 8349 &auth_offset, 8350 stcb, 8351 chk->rec.chunk_id.id); 8352 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8353 } 8354 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 8355 (int)chk->rec.chunk_id.can_take_data, 8356 chk->send_size, chk->copy_by_ref); 8357 if (outchain == NULL) { 8358 *reason_code = 8; 8359 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8360 return (ENOMEM); 8361 } 8362 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8363 /* update our MTU size */ 8364 if (mtu > (chk->send_size + omtu)) 8365 mtu -= (chk->send_size + omtu); 8366 else 8367 mtu = 0; 8368 to_out += (chk->send_size + omtu); 8369 /* Do clear IP_DF ? */ 8370 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8371 no_fragmentflg = 0; 8372 } 8373 if (chk->rec.chunk_id.can_take_data) 8374 chk->data = NULL; 8375 /* Mark things to be removed, if needed */ 8376 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 8377 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ 8378 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 8379 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 8380 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 8381 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 8382 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 8383 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 8384 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 8385 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 8386 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 8387 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) { 8388 hbflag = 1; 8389 } 8390 /* remove these chunks at the end */ 8391 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 8392 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { 8393 /* turn off the timer */ 8394 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 8395 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 8396 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1); 8397 } 8398 } 8399 ctl_cnt++; 8400 } else { 8401 /* 8402 * Other chunks, since they have 8403 * timers running (i.e. COOKIE) we 8404 * just "trust" that it gets sent or 8405 * retransmitted. 8406 */ 8407 ctl_cnt++; 8408 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 8409 cookie = 1; 8410 no_out_cnt = 1; 8411 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 8412 /* 8413 * Increment ecne send count 8414 * here this means we may be 8415 * over-zealous in our 8416 * counting if the send 8417 * fails, but its the best 8418 * place to do it (we used 8419 * to do it in the queue of 8420 * the chunk, but that did 8421 * not tell how many times 8422 * it was sent. 8423 */ 8424 SCTP_STAT_INCR(sctps_sendecne); 8425 } 8426 chk->sent = SCTP_DATAGRAM_SENT; 8427 if (chk->whoTo == NULL) { 8428 chk->whoTo = net; 8429 atomic_add_int(&net->ref_count, 1); 8430 } 8431 chk->snd_count++; 8432 } 8433 if (mtu == 0) { 8434 /* 8435 * Ok we are out of room but we can 8436 * output without effecting the 8437 * flight size since this little guy 8438 * is a control only packet. 8439 */ 8440 if (asconf) { 8441 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 8442 /* 8443 * do NOT clear the asconf 8444 * flag as it is used to do 8445 * appropriate source 8446 * address selection. 8447 */ 8448 } 8449 if (cookie) { 8450 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 8451 cookie = 0; 8452 } 8453 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 8454 (struct sockaddr *)&net->ro._l_addr, 8455 outchain, 8456 auth_offset, auth, 8457 stcb->asoc.authinfo.active_keyid, 8458 no_fragmentflg, 0, asconf, 8459 inp->sctp_lport, stcb->rport, 8460 htonl(stcb->asoc.peer_vtag), 8461 net->port, NULL, 8462 0, 0, 8463 so_locked))) { 8464 if (error == ENOBUFS) { 8465 asoc->ifp_had_enobuf = 1; 8466 SCTP_STAT_INCR(sctps_lowlevelerr); 8467 } 8468 if (from_where == 0) { 8469 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8470 } 8471 /* error, could not output */ 8472 if (hbflag) { 8473 if (*now_filled == 0) { 8474 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8475 *now_filled = 1; 8476 *now = net->last_sent_time; 8477 } else { 8478 net->last_sent_time = *now; 8479 } 8480 hbflag = 0; 8481 } 8482 if (error == EHOSTUNREACH) { 8483 /* 8484 * Destination went 8485 * unreachable 8486 * during this send 8487 */ 8488 sctp_move_chunks_from_net(stcb, net); 8489 } 8490 *reason_code = 7; 8491 continue; 8492 } else 8493 asoc->ifp_had_enobuf = 0; 8494 /* Only HB or ASCONF advances time */ 8495 if (hbflag) { 8496 if (*now_filled == 0) { 8497 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8498 *now_filled = 1; 8499 *now = net->last_sent_time; 8500 } else { 8501 net->last_sent_time = *now; 8502 } 8503 hbflag = 0; 8504 } 8505 /* 8506 * increase the number we sent, if a 8507 * cookie is sent we don't tell them 8508 * any was sent out. 8509 */ 8510 outchain = endoutchain = NULL; 8511 auth = NULL; 8512 auth_offset = 0; 8513 if (!no_out_cnt) 8514 *num_out += ctl_cnt; 8515 /* recalc a clean slate and setup */ 8516 switch (net->ro._l_addr.sa.sa_family) { 8517#ifdef INET 8518 case AF_INET: 8519 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8520 break; 8521#endif 8522#ifdef INET6 8523 case AF_INET6: 8524 mtu = net->mtu - SCTP_MIN_OVERHEAD; 8525 break; 8526#endif 8527 default: 8528 /* TSNH */ 8529 mtu = net->mtu; 8530 break; 8531 } 8532 to_out = 0; 8533 no_fragmentflg = 1; 8534 } 8535 } 8536 } 8537 /* JRI: if dest is in PF state, do not send data to it */ 8538 if ((asoc->sctp_cmt_on_off > 0) && 8539 (net != stcb->asoc.alternate) && 8540 (net->dest_state & SCTP_ADDR_PF)) { 8541 goto no_data_fill; 8542 } 8543 if (net->flight_size >= net->cwnd) { 8544 goto no_data_fill; 8545 } 8546 if ((asoc->sctp_cmt_on_off > 0) && 8547 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) && 8548 (net->flight_size > max_rwnd_per_dest)) { 8549 goto no_data_fill; 8550 } 8551 /* 8552 * We need a specific accounting for the usage of the send 8553 * buffer. We also need to check the number of messages per 8554 * net. For now, this is better than nothing and it disabled 8555 * by default... 8556 */ 8557 if ((asoc->sctp_cmt_on_off > 0) && 8558 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) && 8559 (max_send_per_dest > 0) && 8560 (net->flight_size > max_send_per_dest)) { 8561 goto no_data_fill; 8562 } 8563 /*********************/ 8564 /* Data transmission */ 8565 /*********************/ 8566 /* 8567 * if AUTH for DATA is required and no AUTH has been added 8568 * yet, account for this in the mtu now... if no data can be 8569 * bundled, this adjustment won't matter anyways since the 8570 * packet will be going out... 8571 */ 8572 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, 8573 stcb->asoc.peer_auth_chunks); 8574 if (data_auth_reqd && (auth == NULL)) { 8575 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8576 } 8577 /* now lets add any data within the MTU constraints */ 8578 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { 8579#ifdef INET 8580 case AF_INET: 8581 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr))) 8582 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr)); 8583 else 8584 omtu = 0; 8585 break; 8586#endif 8587#ifdef INET6 8588 case AF_INET6: 8589 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr))) 8590 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)); 8591 else 8592 omtu = 0; 8593 break; 8594#endif 8595 default: 8596 /* TSNH */ 8597 omtu = 0; 8598 break; 8599 } 8600 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) && 8601 (skip_data_for_this_net == 0)) || 8602 (cookie)) { 8603 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 8604 if (no_data_chunks) { 8605 /* let only control go out */ 8606 *reason_code = 1; 8607 break; 8608 } 8609 if (net->flight_size >= net->cwnd) { 8610 /* skip this net, no room for data */ 8611 *reason_code = 2; 8612 break; 8613 } 8614 if ((chk->whoTo != NULL) && 8615 (chk->whoTo != net)) { 8616 /* Don't send the chunk on this net */ 8617 continue; 8618 } 8619 if (asoc->sctp_cmt_on_off == 0) { 8620 if ((asoc->alternate) && 8621 (asoc->alternate != net) && 8622 (chk->whoTo == NULL)) { 8623 continue; 8624 } else if ((net != asoc->primary_destination) && 8625 (asoc->alternate == NULL) && 8626 (chk->whoTo == NULL)) { 8627 continue; 8628 } 8629 } 8630 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) { 8631 /*- 8632 * strange, we have a chunk that is 8633 * to big for its destination and 8634 * yet no fragment ok flag. 8635 * Something went wrong when the 8636 * PMTU changed...we did not mark 8637 * this chunk for some reason?? I 8638 * will fix it here by letting IP 8639 * fragment it for now and printing 8640 * a warning. This really should not 8641 * happen ... 8642 */ 8643 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n", 8644 chk->send_size, mtu); 8645 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 8646 } 8647 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && 8648 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) { 8649 struct sctp_data_chunk *dchkh; 8650 8651 dchkh = mtod(chk->data, struct sctp_data_chunk *); 8652 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY; 8653 } 8654 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) || 8655 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) { 8656 /* ok we will add this one */ 8657 8658 /* 8659 * Add an AUTH chunk, if chunk 8660 * requires it, save the offset into 8661 * the chain for AUTH 8662 */ 8663 if (data_auth_reqd) { 8664 if (auth == NULL) { 8665 outchain = sctp_add_auth_chunk(outchain, 8666 &endoutchain, 8667 &auth, 8668 &auth_offset, 8669 stcb, 8670 SCTP_DATA); 8671 auth_keyid = chk->auth_keyid; 8672 override_ok = 0; 8673 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8674 } else if (override_ok) { 8675 /* 8676 * use this data's 8677 * keyid 8678 */ 8679 auth_keyid = chk->auth_keyid; 8680 override_ok = 0; 8681 } else if (auth_keyid != chk->auth_keyid) { 8682 /* 8683 * different keyid, 8684 * so done bundling 8685 */ 8686 break; 8687 } 8688 } 8689 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0, 8690 chk->send_size, chk->copy_by_ref); 8691 if (outchain == NULL) { 8692 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n"); 8693 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 8694 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8695 } 8696 *reason_code = 3; 8697 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8698 return (ENOMEM); 8699 } 8700 /* upate our MTU size */ 8701 /* Do clear IP_DF ? */ 8702 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8703 no_fragmentflg = 0; 8704 } 8705 /* unsigned subtraction of mtu */ 8706 if (mtu > chk->send_size) 8707 mtu -= chk->send_size; 8708 else 8709 mtu = 0; 8710 /* unsigned subtraction of r_mtu */ 8711 if (r_mtu > chk->send_size) 8712 r_mtu -= chk->send_size; 8713 else 8714 r_mtu = 0; 8715 8716 to_out += chk->send_size; 8717 if ((to_out > mx_mtu) && no_fragmentflg) { 8718#ifdef INVARIANTS 8719 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out); 8720#else 8721 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n", 8722 mx_mtu, to_out); 8723#endif 8724 } 8725 chk->window_probe = 0; 8726 data_list[bundle_at++] = chk; 8727 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 8728 break; 8729 } 8730 if (chk->sent == SCTP_DATAGRAM_UNSENT) { 8731 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) { 8732 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks); 8733 } else { 8734 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks); 8735 } 8736 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) && 8737 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0)) 8738 /* 8739 * Count number of 8740 * user msg's that 8741 * were fragmented 8742 * we do this by 8743 * counting when we 8744 * see a LAST 8745 * fragment only. 8746 */ 8747 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs); 8748 } 8749 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) { 8750 if ((one_chunk) && (stcb->asoc.total_flight == 0)) { 8751 data_list[0]->window_probe = 1; 8752 net->window_probe = 1; 8753 } 8754 break; 8755 } 8756 } else { 8757 /* 8758 * Must be sent in order of the 8759 * TSN's (on a network) 8760 */ 8761 break; 8762 } 8763 } /* for (chunk gather loop for this net) */ 8764 } /* if asoc.state OPEN */ 8765no_data_fill: 8766 /* Is there something to send for this destination? */ 8767 if (outchain) { 8768 /* We may need to start a control timer or two */ 8769 if (asconf) { 8770 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 8771 stcb, net); 8772 /* 8773 * do NOT clear the asconf flag as it is 8774 * used to do appropriate source address 8775 * selection. 8776 */ 8777 } 8778 if (cookie) { 8779 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 8780 cookie = 0; 8781 } 8782 /* must start a send timer if data is being sent */ 8783 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) { 8784 /* 8785 * no timer running on this destination 8786 * restart it. 8787 */ 8788 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8789 } 8790 /* Now send it, if there is anything to send :> */ 8791 if ((error = sctp_lowlevel_chunk_output(inp, 8792 stcb, 8793 net, 8794 (struct sockaddr *)&net->ro._l_addr, 8795 outchain, 8796 auth_offset, 8797 auth, 8798 auth_keyid, 8799 no_fragmentflg, 8800 bundle_at, 8801 asconf, 8802 inp->sctp_lport, stcb->rport, 8803 htonl(stcb->asoc.peer_vtag), 8804 net->port, NULL, 8805 0, 0, 8806 so_locked))) { 8807 /* error, we could not output */ 8808 if (error == ENOBUFS) { 8809 SCTP_STAT_INCR(sctps_lowlevelerr); 8810 asoc->ifp_had_enobuf = 1; 8811 } 8812 if (from_where == 0) { 8813 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8814 } 8815 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error); 8816 if (hbflag) { 8817 if (*now_filled == 0) { 8818 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8819 *now_filled = 1; 8820 *now = net->last_sent_time; 8821 } else { 8822 net->last_sent_time = *now; 8823 } 8824 hbflag = 0; 8825 } 8826 if (error == EHOSTUNREACH) { 8827 /* 8828 * Destination went unreachable 8829 * during this send 8830 */ 8831 sctp_move_chunks_from_net(stcb, net); 8832 } 8833 *reason_code = 6; 8834 /*- 8835 * I add this line to be paranoid. As far as 8836 * I can tell the continue, takes us back to 8837 * the top of the for, but just to make sure 8838 * I will reset these again here. 8839 */ 8840 ctl_cnt = bundle_at = 0; 8841 continue; /* This takes us back to the 8842 * for() for the nets. */ 8843 } else { 8844 asoc->ifp_had_enobuf = 0; 8845 } 8846 endoutchain = NULL; 8847 auth = NULL; 8848 auth_offset = 0; 8849 if (bundle_at || hbflag) { 8850 /* For data/asconf and hb set time */ 8851 if (*now_filled == 0) { 8852 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8853 *now_filled = 1; 8854 *now = net->last_sent_time; 8855 } else { 8856 net->last_sent_time = *now; 8857 } 8858 } 8859 if (!no_out_cnt) { 8860 *num_out += (ctl_cnt + bundle_at); 8861 } 8862 if (bundle_at) { 8863 /* setup for a RTO measurement */ 8864 tsns_sent = data_list[0]->rec.data.TSN_seq; 8865 /* fill time if not already filled */ 8866 if (*now_filled == 0) { 8867 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); 8868 *now_filled = 1; 8869 *now = asoc->time_last_sent; 8870 } else { 8871 asoc->time_last_sent = *now; 8872 } 8873 if (net->rto_needed) { 8874 data_list[0]->do_rtt = 1; 8875 net->rto_needed = 0; 8876 } 8877 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at); 8878 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net); 8879 } 8880 if (one_chunk) { 8881 break; 8882 } 8883 } 8884 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 8885 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND); 8886 } 8887 } 8888 if (old_start_at == NULL) { 8889 old_start_at = start_at; 8890 start_at = TAILQ_FIRST(&asoc->nets); 8891 if (old_start_at) 8892 goto again_one_more_time; 8893 } 8894 /* 8895 * At the end there should be no NON timed chunks hanging on this 8896 * queue. 8897 */ 8898 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 8899 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND); 8900 } 8901 if ((*num_out == 0) && (*reason_code == 0)) { 8902 *reason_code = 4; 8903 } else { 8904 *reason_code = 5; 8905 } 8906 sctp_clean_up_ctl(stcb, asoc, so_locked); 8907 return (0); 8908} 8909 8910void 8911sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err) 8912{ 8913 /*- 8914 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of 8915 * the control chunk queue. 8916 */ 8917 struct sctp_chunkhdr *hdr; 8918 struct sctp_tmit_chunk *chk; 8919 struct mbuf *mat; 8920 8921 SCTP_TCB_LOCK_ASSERT(stcb); 8922 sctp_alloc_a_chunk(stcb, chk); 8923 if (chk == NULL) { 8924 /* no memory */ 8925 sctp_m_freem(op_err); 8926 return; 8927 } 8928 chk->copy_by_ref = 0; 8929 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT); 8930 if (op_err == NULL) { 8931 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 8932 return; 8933 } 8934 chk->send_size = 0; 8935 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) { 8936 chk->send_size += SCTP_BUF_LEN(mat); 8937 } 8938 chk->sent = SCTP_DATAGRAM_UNSENT; 8939 chk->snd_count = 0; 8940 chk->asoc = &stcb->asoc; 8941 chk->data = op_err; 8942 chk->whoTo = NULL; 8943 hdr = mtod(op_err, struct sctp_chunkhdr *); 8944 hdr->chunk_type = SCTP_OPERATION_ERROR; 8945 hdr->chunk_flags = 0; 8946 hdr->chunk_length = htons(chk->send_size); 8947 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, 8948 chk, 8949 sctp_next); 8950 chk->asoc->ctrl_queue_cnt++; 8951} 8952 8953int 8954sctp_send_cookie_echo(struct mbuf *m, 8955 int offset, 8956 struct sctp_tcb *stcb, 8957 struct sctp_nets *net) 8958{ 8959 /*- 8960 * pull out the cookie and put it at the front of the control chunk 8961 * queue. 8962 */ 8963 int at; 8964 struct mbuf *cookie; 8965 struct sctp_paramhdr parm, *phdr; 8966 struct sctp_chunkhdr *hdr; 8967 struct sctp_tmit_chunk *chk; 8968 uint16_t ptype, plen; 8969 8970 /* First find the cookie in the param area */ 8971 cookie = NULL; 8972 at = offset + sizeof(struct sctp_init_chunk); 8973 8974 SCTP_TCB_LOCK_ASSERT(stcb); 8975 do { 8976 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm)); 8977 if (phdr == NULL) { 8978 return (-3); 8979 } 8980 ptype = ntohs(phdr->param_type); 8981 plen = ntohs(phdr->param_length); 8982 if (ptype == SCTP_STATE_COOKIE) { 8983 int pad; 8984 8985 /* found the cookie */ 8986 if ((pad = (plen % 4))) { 8987 plen += 4 - pad; 8988 } 8989 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT); 8990 if (cookie == NULL) { 8991 /* No memory */ 8992 return (-2); 8993 } 8994#ifdef SCTP_MBUF_LOGGING 8995 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 8996 struct mbuf *mat; 8997 8998 for (mat = cookie; mat; mat = SCTP_BUF_NEXT(mat)) { 8999 if (SCTP_BUF_IS_EXTENDED(mat)) { 9000 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 9001 } 9002 } 9003 } 9004#endif 9005 break; 9006 } 9007 at += SCTP_SIZE32(plen); 9008 } while (phdr); 9009 if (cookie == NULL) { 9010 /* Did not find the cookie */ 9011 return (-3); 9012 } 9013 /* ok, we got the cookie lets change it into a cookie echo chunk */ 9014 9015 /* first the change from param to cookie */ 9016 hdr = mtod(cookie, struct sctp_chunkhdr *); 9017 hdr->chunk_type = SCTP_COOKIE_ECHO; 9018 hdr->chunk_flags = 0; 9019 /* get the chunk stuff now and place it in the FRONT of the queue */ 9020 sctp_alloc_a_chunk(stcb, chk); 9021 if (chk == NULL) { 9022 /* no memory */ 9023 sctp_m_freem(cookie); 9024 return (-5); 9025 } 9026 chk->copy_by_ref = 0; 9027 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO; 9028 chk->rec.chunk_id.can_take_data = 0; 9029 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 9030 chk->send_size = plen; 9031 chk->sent = SCTP_DATAGRAM_UNSENT; 9032 chk->snd_count = 0; 9033 chk->asoc = &stcb->asoc; 9034 chk->data = cookie; 9035 chk->whoTo = net; 9036 atomic_add_int(&chk->whoTo->ref_count, 1); 9037 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next); 9038 chk->asoc->ctrl_queue_cnt++; 9039 return (0); 9040} 9041 9042void 9043sctp_send_heartbeat_ack(struct sctp_tcb *stcb, 9044 struct mbuf *m, 9045 int offset, 9046 int chk_length, 9047 struct sctp_nets *net) 9048{ 9049 /* 9050 * take a HB request and make it into a HB ack and send it. 9051 */ 9052 struct mbuf *outchain; 9053 struct sctp_chunkhdr *chdr; 9054 struct sctp_tmit_chunk *chk; 9055 9056 9057 if (net == NULL) 9058 /* must have a net pointer */ 9059 return; 9060 9061 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT); 9062 if (outchain == NULL) { 9063 /* gak out of memory */ 9064 return; 9065 } 9066#ifdef SCTP_MBUF_LOGGING 9067 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 9068 struct mbuf *mat; 9069 9070 for (mat = outchain; mat; mat = SCTP_BUF_NEXT(mat)) { 9071 if (SCTP_BUF_IS_EXTENDED(mat)) { 9072 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 9073 } 9074 } 9075 } 9076#endif 9077 chdr = mtod(outchain, struct sctp_chunkhdr *); 9078 chdr->chunk_type = SCTP_HEARTBEAT_ACK; 9079 chdr->chunk_flags = 0; 9080 if (chk_length % 4) { 9081 /* need pad */ 9082 uint32_t cpthis = 0; 9083 int padlen; 9084 9085 padlen = 4 - (chk_length % 4); 9086 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis); 9087 } 9088 sctp_alloc_a_chunk(stcb, chk); 9089 if (chk == NULL) { 9090 /* no memory */ 9091 sctp_m_freem(outchain); 9092 return; 9093 } 9094 chk->copy_by_ref = 0; 9095 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK; 9096 chk->rec.chunk_id.can_take_data = 1; 9097 chk->flags = 0; 9098 chk->send_size = chk_length; 9099 chk->sent = SCTP_DATAGRAM_UNSENT; 9100 chk->snd_count = 0; 9101 chk->asoc = &stcb->asoc; 9102 chk->data = outchain; 9103 chk->whoTo = net; 9104 atomic_add_int(&chk->whoTo->ref_count, 1); 9105 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9106 chk->asoc->ctrl_queue_cnt++; 9107} 9108 9109void 9110sctp_send_cookie_ack(struct sctp_tcb *stcb) 9111{ 9112 /* formulate and queue a cookie-ack back to sender */ 9113 struct mbuf *cookie_ack; 9114 struct sctp_chunkhdr *hdr; 9115 struct sctp_tmit_chunk *chk; 9116 9117 SCTP_TCB_LOCK_ASSERT(stcb); 9118 9119 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER); 9120 if (cookie_ack == NULL) { 9121 /* no mbuf's */ 9122 return; 9123 } 9124 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD); 9125 sctp_alloc_a_chunk(stcb, chk); 9126 if (chk == NULL) { 9127 /* no memory */ 9128 sctp_m_freem(cookie_ack); 9129 return; 9130 } 9131 chk->copy_by_ref = 0; 9132 chk->rec.chunk_id.id = SCTP_COOKIE_ACK; 9133 chk->rec.chunk_id.can_take_data = 1; 9134 chk->flags = 0; 9135 chk->send_size = sizeof(struct sctp_chunkhdr); 9136 chk->sent = SCTP_DATAGRAM_UNSENT; 9137 chk->snd_count = 0; 9138 chk->asoc = &stcb->asoc; 9139 chk->data = cookie_ack; 9140 if (chk->asoc->last_control_chunk_from != NULL) { 9141 chk->whoTo = chk->asoc->last_control_chunk_from; 9142 atomic_add_int(&chk->whoTo->ref_count, 1); 9143 } else { 9144 chk->whoTo = NULL; 9145 } 9146 hdr = mtod(cookie_ack, struct sctp_chunkhdr *); 9147 hdr->chunk_type = SCTP_COOKIE_ACK; 9148 hdr->chunk_flags = 0; 9149 hdr->chunk_length = htons(chk->send_size); 9150 SCTP_BUF_LEN(cookie_ack) = chk->send_size; 9151 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9152 chk->asoc->ctrl_queue_cnt++; 9153 return; 9154} 9155 9156 9157void 9158sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net) 9159{ 9160 /* formulate and queue a SHUTDOWN-ACK back to the sender */ 9161 struct mbuf *m_shutdown_ack; 9162 struct sctp_shutdown_ack_chunk *ack_cp; 9163 struct sctp_tmit_chunk *chk; 9164 9165 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER); 9166 if (m_shutdown_ack == NULL) { 9167 /* no mbuf's */ 9168 return; 9169 } 9170 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD); 9171 sctp_alloc_a_chunk(stcb, chk); 9172 if (chk == NULL) { 9173 /* no memory */ 9174 sctp_m_freem(m_shutdown_ack); 9175 return; 9176 } 9177 chk->copy_by_ref = 0; 9178 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK; 9179 chk->rec.chunk_id.can_take_data = 1; 9180 chk->flags = 0; 9181 chk->send_size = sizeof(struct sctp_chunkhdr); 9182 chk->sent = SCTP_DATAGRAM_UNSENT; 9183 chk->snd_count = 0; 9184 chk->flags = 0; 9185 chk->asoc = &stcb->asoc; 9186 chk->data = m_shutdown_ack; 9187 chk->whoTo = net; 9188 if (chk->whoTo) { 9189 atomic_add_int(&chk->whoTo->ref_count, 1); 9190 } 9191 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *); 9192 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK; 9193 ack_cp->ch.chunk_flags = 0; 9194 ack_cp->ch.chunk_length = htons(chk->send_size); 9195 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size; 9196 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9197 chk->asoc->ctrl_queue_cnt++; 9198 return; 9199} 9200 9201void 9202sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net) 9203{ 9204 /* formulate and queue a SHUTDOWN to the sender */ 9205 struct mbuf *m_shutdown; 9206 struct sctp_shutdown_chunk *shutdown_cp; 9207 struct sctp_tmit_chunk *chk; 9208 9209 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER); 9210 if (m_shutdown == NULL) { 9211 /* no mbuf's */ 9212 return; 9213 } 9214 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD); 9215 sctp_alloc_a_chunk(stcb, chk); 9216 if (chk == NULL) { 9217 /* no memory */ 9218 sctp_m_freem(m_shutdown); 9219 return; 9220 } 9221 chk->copy_by_ref = 0; 9222 chk->rec.chunk_id.id = SCTP_SHUTDOWN; 9223 chk->rec.chunk_id.can_take_data = 1; 9224 chk->flags = 0; 9225 chk->send_size = sizeof(struct sctp_shutdown_chunk); 9226 chk->sent = SCTP_DATAGRAM_UNSENT; 9227 chk->snd_count = 0; 9228 chk->flags = 0; 9229 chk->asoc = &stcb->asoc; 9230 chk->data = m_shutdown; 9231 chk->whoTo = net; 9232 if (chk->whoTo) { 9233 atomic_add_int(&chk->whoTo->ref_count, 1); 9234 } 9235 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *); 9236 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN; 9237 shutdown_cp->ch.chunk_flags = 0; 9238 shutdown_cp->ch.chunk_length = htons(chk->send_size); 9239 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn); 9240 SCTP_BUF_LEN(m_shutdown) = chk->send_size; 9241 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9242 chk->asoc->ctrl_queue_cnt++; 9243 return; 9244} 9245 9246void 9247sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked) 9248{ 9249 /* 9250 * formulate and queue an ASCONF to the peer. ASCONF parameters 9251 * should be queued on the assoc queue. 9252 */ 9253 struct sctp_tmit_chunk *chk; 9254 struct mbuf *m_asconf; 9255 int len; 9256 9257 SCTP_TCB_LOCK_ASSERT(stcb); 9258 9259 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) && 9260 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) { 9261 /* can't send a new one if there is one in flight already */ 9262 return; 9263 } 9264 /* compose an ASCONF chunk, maximum length is PMTU */ 9265 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked); 9266 if (m_asconf == NULL) { 9267 return; 9268 } 9269 sctp_alloc_a_chunk(stcb, chk); 9270 if (chk == NULL) { 9271 /* no memory */ 9272 sctp_m_freem(m_asconf); 9273 return; 9274 } 9275 chk->copy_by_ref = 0; 9276 chk->rec.chunk_id.id = SCTP_ASCONF; 9277 chk->rec.chunk_id.can_take_data = 0; 9278 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 9279 chk->data = m_asconf; 9280 chk->send_size = len; 9281 chk->sent = SCTP_DATAGRAM_UNSENT; 9282 chk->snd_count = 0; 9283 chk->asoc = &stcb->asoc; 9284 chk->whoTo = net; 9285 if (chk->whoTo) { 9286 atomic_add_int(&chk->whoTo->ref_count, 1); 9287 } 9288 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next); 9289 chk->asoc->ctrl_queue_cnt++; 9290 return; 9291} 9292 9293void 9294sctp_send_asconf_ack(struct sctp_tcb *stcb) 9295{ 9296 /* 9297 * formulate and queue a asconf-ack back to sender. the asconf-ack 9298 * must be stored in the tcb. 9299 */ 9300 struct sctp_tmit_chunk *chk; 9301 struct sctp_asconf_ack *ack, *latest_ack; 9302 struct mbuf *m_ack; 9303 struct sctp_nets *net = NULL; 9304 9305 SCTP_TCB_LOCK_ASSERT(stcb); 9306 /* Get the latest ASCONF-ACK */ 9307 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead); 9308 if (latest_ack == NULL) { 9309 return; 9310 } 9311 if (latest_ack->last_sent_to != NULL && 9312 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) { 9313 /* we're doing a retransmission */ 9314 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0); 9315 if (net == NULL) { 9316 /* no alternate */ 9317 if (stcb->asoc.last_control_chunk_from == NULL) { 9318 if (stcb->asoc.alternate) { 9319 net = stcb->asoc.alternate; 9320 } else { 9321 net = stcb->asoc.primary_destination; 9322 } 9323 } else { 9324 net = stcb->asoc.last_control_chunk_from; 9325 } 9326 } 9327 } else { 9328 /* normal case */ 9329 if (stcb->asoc.last_control_chunk_from == NULL) { 9330 if (stcb->asoc.alternate) { 9331 net = stcb->asoc.alternate; 9332 } else { 9333 net = stcb->asoc.primary_destination; 9334 } 9335 } else { 9336 net = stcb->asoc.last_control_chunk_from; 9337 } 9338 } 9339 latest_ack->last_sent_to = net; 9340 9341 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) { 9342 if (ack->data == NULL) { 9343 continue; 9344 } 9345 /* copy the asconf_ack */ 9346 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT); 9347 if (m_ack == NULL) { 9348 /* couldn't copy it */ 9349 return; 9350 } 9351#ifdef SCTP_MBUF_LOGGING 9352 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 9353 struct mbuf *mat; 9354 9355 for (mat = m_ack; mat; mat = SCTP_BUF_NEXT(mat)) { 9356 if (SCTP_BUF_IS_EXTENDED(mat)) { 9357 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 9358 } 9359 } 9360 } 9361#endif 9362 9363 sctp_alloc_a_chunk(stcb, chk); 9364 if (chk == NULL) { 9365 /* no memory */ 9366 if (m_ack) 9367 sctp_m_freem(m_ack); 9368 return; 9369 } 9370 chk->copy_by_ref = 0; 9371 chk->rec.chunk_id.id = SCTP_ASCONF_ACK; 9372 chk->rec.chunk_id.can_take_data = 1; 9373 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 9374 chk->whoTo = net; 9375 if (chk->whoTo) { 9376 atomic_add_int(&chk->whoTo->ref_count, 1); 9377 } 9378 chk->data = m_ack; 9379 chk->send_size = 0; 9380 /* Get size */ 9381 chk->send_size = ack->len; 9382 chk->sent = SCTP_DATAGRAM_UNSENT; 9383 chk->snd_count = 0; 9384 chk->asoc = &stcb->asoc; 9385 9386 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9387 chk->asoc->ctrl_queue_cnt++; 9388 } 9389 return; 9390} 9391 9392 9393static int 9394sctp_chunk_retransmission(struct sctp_inpcb *inp, 9395 struct sctp_tcb *stcb, 9396 struct sctp_association *asoc, 9397 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked 9398#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 9399 SCTP_UNUSED 9400#endif 9401) 9402{ 9403 /*- 9404 * send out one MTU of retransmission. If fast_retransmit is 9405 * happening we ignore the cwnd. Otherwise we obey the cwnd and 9406 * rwnd. For a Cookie or Asconf in the control chunk queue we 9407 * retransmit them by themselves. 9408 * 9409 * For data chunks we will pick out the lowest TSN's in the sent_queue 9410 * marked for resend and bundle them all together (up to a MTU of 9411 * destination). The address to send to should have been 9412 * selected/changed where the retransmission was marked (i.e. in FR 9413 * or t3-timeout routines). 9414 */ 9415 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 9416 struct sctp_tmit_chunk *chk, *fwd; 9417 struct mbuf *m, *endofchain; 9418 struct sctp_nets *net = NULL; 9419 uint32_t tsns_sent = 0; 9420 int no_fragmentflg, bundle_at, cnt_thru; 9421 unsigned int mtu; 9422 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started; 9423 struct sctp_auth_chunk *auth = NULL; 9424 uint32_t auth_offset = 0; 9425 uint16_t auth_keyid; 9426 int override_ok = 1; 9427 int data_auth_reqd = 0; 9428 uint32_t dmtu = 0; 9429 9430 SCTP_TCB_LOCK_ASSERT(stcb); 9431 tmr_started = ctl_cnt = bundle_at = error = 0; 9432 no_fragmentflg = 1; 9433 fwd_tsn = 0; 9434 *cnt_out = 0; 9435 fwd = NULL; 9436 endofchain = m = NULL; 9437 auth_keyid = stcb->asoc.authinfo.active_keyid; 9438#ifdef SCTP_AUDITING_ENABLED 9439 sctp_audit_log(0xC3, 1); 9440#endif 9441 if ((TAILQ_EMPTY(&asoc->sent_queue)) && 9442 (TAILQ_EMPTY(&asoc->control_send_queue))) { 9443 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n", 9444 asoc->sent_queue_retran_cnt); 9445 asoc->sent_queue_cnt = 0; 9446 asoc->sent_queue_cnt_removeable = 0; 9447 /* send back 0/0 so we enter normal transmission */ 9448 *cnt_out = 0; 9449 return (0); 9450 } 9451 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 9452 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) || 9453 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) || 9454 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) { 9455 if (chk->sent != SCTP_DATAGRAM_RESEND) { 9456 continue; 9457 } 9458 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 9459 if (chk != asoc->str_reset) { 9460 /* 9461 * not eligible for retran if its 9462 * not ours 9463 */ 9464 continue; 9465 } 9466 } 9467 ctl_cnt++; 9468 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 9469 fwd_tsn = 1; 9470 } 9471 /* 9472 * Add an AUTH chunk, if chunk requires it save the 9473 * offset into the chain for AUTH 9474 */ 9475 if ((auth == NULL) && 9476 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 9477 stcb->asoc.peer_auth_chunks))) { 9478 m = sctp_add_auth_chunk(m, &endofchain, 9479 &auth, &auth_offset, 9480 stcb, 9481 chk->rec.chunk_id.id); 9482 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9483 } 9484 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 9485 break; 9486 } 9487 } 9488 one_chunk = 0; 9489 cnt_thru = 0; 9490 /* do we have control chunks to retransmit? */ 9491 if (m != NULL) { 9492 /* Start a timer no matter if we suceed or fail */ 9493 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 9494 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo); 9495 } else if (chk->rec.chunk_id.id == SCTP_ASCONF) 9496 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo); 9497 chk->snd_count++; /* update our count */ 9498 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo, 9499 (struct sockaddr *)&chk->whoTo->ro._l_addr, m, 9500 auth_offset, auth, stcb->asoc.authinfo.active_keyid, 9501 no_fragmentflg, 0, 0, 9502 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), 9503 chk->whoTo->port, NULL, 9504 0, 0, 9505 so_locked))) { 9506 SCTP_STAT_INCR(sctps_lowlevelerr); 9507 return (error); 9508 } 9509 endofchain = NULL; 9510 auth = NULL; 9511 auth_offset = 0; 9512 /* 9513 * We don't want to mark the net->sent time here since this 9514 * we use this for HB and retrans cannot measure RTT 9515 */ 9516 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */ 9517 *cnt_out += 1; 9518 chk->sent = SCTP_DATAGRAM_SENT; 9519 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt); 9520 if (fwd_tsn == 0) { 9521 return (0); 9522 } else { 9523 /* Clean up the fwd-tsn list */ 9524 sctp_clean_up_ctl(stcb, asoc, so_locked); 9525 return (0); 9526 } 9527 } 9528 /* 9529 * Ok, it is just data retransmission we need to do or that and a 9530 * fwd-tsn with it all. 9531 */ 9532 if (TAILQ_EMPTY(&asoc->sent_queue)) { 9533 return (SCTP_RETRAN_DONE); 9534 } 9535 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) || 9536 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) { 9537 /* not yet open, resend the cookie and that is it */ 9538 return (1); 9539 } 9540#ifdef SCTP_AUDITING_ENABLED 9541 sctp_auditing(20, inp, stcb, NULL); 9542#endif 9543 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks); 9544 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 9545 if (chk->sent != SCTP_DATAGRAM_RESEND) { 9546 /* No, not sent to this net or not ready for rtx */ 9547 continue; 9548 } 9549 if (chk->data == NULL) { 9550 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n", 9551 chk->rec.data.TSN_seq, chk->snd_count, chk->sent); 9552 continue; 9553 } 9554 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) && 9555 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) { 9556 /* Gak, we have exceeded max unlucky retran, abort! */ 9557 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n", 9558 chk->snd_count, 9559 SCTP_BASE_SYSCTL(sctp_max_retran_chunk)); 9560 atomic_add_int(&stcb->asoc.refcnt, 1); 9561 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked); 9562 SCTP_TCB_LOCK(stcb); 9563 atomic_subtract_int(&stcb->asoc.refcnt, 1); 9564 return (SCTP_RETRAN_EXIT); 9565 } 9566 /* pick up the net */ 9567 net = chk->whoTo; 9568 switch (net->ro._l_addr.sa.sa_family) { 9569#ifdef INET 9570 case AF_INET: 9571 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 9572 break; 9573#endif 9574#ifdef INET6 9575 case AF_INET6: 9576 mtu = net->mtu - SCTP_MIN_OVERHEAD; 9577 break; 9578#endif 9579 default: 9580 /* TSNH */ 9581 mtu = net->mtu; 9582 break; 9583 } 9584 9585 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) { 9586 /* No room in peers rwnd */ 9587 uint32_t tsn; 9588 9589 tsn = asoc->last_acked_seq + 1; 9590 if (tsn == chk->rec.data.TSN_seq) { 9591 /* 9592 * we make a special exception for this 9593 * case. The peer has no rwnd but is missing 9594 * the lowest chunk.. which is probably what 9595 * is holding up the rwnd. 9596 */ 9597 goto one_chunk_around; 9598 } 9599 return (1); 9600 } 9601one_chunk_around: 9602 if (asoc->peers_rwnd < mtu) { 9603 one_chunk = 1; 9604 if ((asoc->peers_rwnd == 0) && 9605 (asoc->total_flight == 0)) { 9606 chk->window_probe = 1; 9607 chk->whoTo->window_probe = 1; 9608 } 9609 } 9610#ifdef SCTP_AUDITING_ENABLED 9611 sctp_audit_log(0xC3, 2); 9612#endif 9613 bundle_at = 0; 9614 m = NULL; 9615 net->fast_retran_ip = 0; 9616 if (chk->rec.data.doing_fast_retransmit == 0) { 9617 /* 9618 * if no FR in progress skip destination that have 9619 * flight_size > cwnd. 9620 */ 9621 if (net->flight_size >= net->cwnd) { 9622 continue; 9623 } 9624 } else { 9625 /* 9626 * Mark the destination net to have FR recovery 9627 * limits put on it. 9628 */ 9629 *fr_done = 1; 9630 net->fast_retran_ip = 1; 9631 } 9632 9633 /* 9634 * if no AUTH is yet included and this chunk requires it, 9635 * make sure to account for it. We don't apply the size 9636 * until the AUTH chunk is actually added below in case 9637 * there is no room for this chunk. 9638 */ 9639 if (data_auth_reqd && (auth == NULL)) { 9640 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 9641 } else 9642 dmtu = 0; 9643 9644 if ((chk->send_size <= (mtu - dmtu)) || 9645 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 9646 /* ok we will add this one */ 9647 if (data_auth_reqd) { 9648 if (auth == NULL) { 9649 m = sctp_add_auth_chunk(m, 9650 &endofchain, 9651 &auth, 9652 &auth_offset, 9653 stcb, 9654 SCTP_DATA); 9655 auth_keyid = chk->auth_keyid; 9656 override_ok = 0; 9657 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9658 } else if (override_ok) { 9659 auth_keyid = chk->auth_keyid; 9660 override_ok = 0; 9661 } else if (chk->auth_keyid != auth_keyid) { 9662 /* different keyid, so done bundling */ 9663 break; 9664 } 9665 } 9666 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 9667 if (m == NULL) { 9668 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 9669 return (ENOMEM); 9670 } 9671 /* Do clear IP_DF ? */ 9672 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 9673 no_fragmentflg = 0; 9674 } 9675 /* upate our MTU size */ 9676 if (mtu > (chk->send_size + dmtu)) 9677 mtu -= (chk->send_size + dmtu); 9678 else 9679 mtu = 0; 9680 data_list[bundle_at++] = chk; 9681 if (one_chunk && (asoc->total_flight <= 0)) { 9682 SCTP_STAT_INCR(sctps_windowprobed); 9683 } 9684 } 9685 if (one_chunk == 0) { 9686 /* 9687 * now are there anymore forward from chk to pick 9688 * up? 9689 */ 9690 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) { 9691 if (fwd->sent != SCTP_DATAGRAM_RESEND) { 9692 /* Nope, not for retran */ 9693 continue; 9694 } 9695 if (fwd->whoTo != net) { 9696 /* Nope, not the net in question */ 9697 continue; 9698 } 9699 if (data_auth_reqd && (auth == NULL)) { 9700 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 9701 } else 9702 dmtu = 0; 9703 if (fwd->send_size <= (mtu - dmtu)) { 9704 if (data_auth_reqd) { 9705 if (auth == NULL) { 9706 m = sctp_add_auth_chunk(m, 9707 &endofchain, 9708 &auth, 9709 &auth_offset, 9710 stcb, 9711 SCTP_DATA); 9712 auth_keyid = fwd->auth_keyid; 9713 override_ok = 0; 9714 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9715 } else if (override_ok) { 9716 auth_keyid = fwd->auth_keyid; 9717 override_ok = 0; 9718 } else if (fwd->auth_keyid != auth_keyid) { 9719 /* 9720 * different keyid, 9721 * so done bundling 9722 */ 9723 break; 9724 } 9725 } 9726 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref); 9727 if (m == NULL) { 9728 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 9729 return (ENOMEM); 9730 } 9731 /* Do clear IP_DF ? */ 9732 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) { 9733 no_fragmentflg = 0; 9734 } 9735 /* upate our MTU size */ 9736 if (mtu > (fwd->send_size + dmtu)) 9737 mtu -= (fwd->send_size + dmtu); 9738 else 9739 mtu = 0; 9740 data_list[bundle_at++] = fwd; 9741 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 9742 break; 9743 } 9744 } else { 9745 /* can't fit so we are done */ 9746 break; 9747 } 9748 } 9749 } 9750 /* Is there something to send for this destination? */ 9751 if (m) { 9752 /* 9753 * No matter if we fail/or suceed we should start a 9754 * timer. A failure is like a lost IP packet :-) 9755 */ 9756 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 9757 /* 9758 * no timer running on this destination 9759 * restart it. 9760 */ 9761 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 9762 tmr_started = 1; 9763 } 9764 /* Now lets send it, if there is anything to send :> */ 9765 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 9766 (struct sockaddr *)&net->ro._l_addr, m, 9767 auth_offset, auth, auth_keyid, 9768 no_fragmentflg, 0, 0, 9769 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), 9770 net->port, NULL, 9771 0, 0, 9772 so_locked))) { 9773 /* error, we could not output */ 9774 SCTP_STAT_INCR(sctps_lowlevelerr); 9775 return (error); 9776 } 9777 endofchain = NULL; 9778 auth = NULL; 9779 auth_offset = 0; 9780 /* For HB's */ 9781 /* 9782 * We don't want to mark the net->sent time here 9783 * since this we use this for HB and retrans cannot 9784 * measure RTT 9785 */ 9786 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */ 9787 9788 /* For auto-close */ 9789 cnt_thru++; 9790 if (*now_filled == 0) { 9791 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); 9792 *now = asoc->time_last_sent; 9793 *now_filled = 1; 9794 } else { 9795 asoc->time_last_sent = *now; 9796 } 9797 *cnt_out += bundle_at; 9798#ifdef SCTP_AUDITING_ENABLED 9799 sctp_audit_log(0xC4, bundle_at); 9800#endif 9801 if (bundle_at) { 9802 tsns_sent = data_list[0]->rec.data.TSN_seq; 9803 } 9804 for (i = 0; i < bundle_at; i++) { 9805 SCTP_STAT_INCR(sctps_sendretransdata); 9806 data_list[i]->sent = SCTP_DATAGRAM_SENT; 9807 /* 9808 * When we have a revoked data, and we 9809 * retransmit it, then we clear the revoked 9810 * flag since this flag dictates if we 9811 * subtracted from the fs 9812 */ 9813 if (data_list[i]->rec.data.chunk_was_revoked) { 9814 /* Deflate the cwnd */ 9815 data_list[i]->whoTo->cwnd -= data_list[i]->book_size; 9816 data_list[i]->rec.data.chunk_was_revoked = 0; 9817 } 9818 data_list[i]->snd_count++; 9819 sctp_ucount_decr(asoc->sent_queue_retran_cnt); 9820 /* record the time */ 9821 data_list[i]->sent_rcv_time = asoc->time_last_sent; 9822 if (data_list[i]->book_size_scale) { 9823 /* 9824 * need to double the book size on 9825 * this one 9826 */ 9827 data_list[i]->book_size_scale = 0; 9828 /* 9829 * Since we double the booksize, we 9830 * must also double the output queue 9831 * size, since this get shrunk when 9832 * we free by this amount. 9833 */ 9834 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size); 9835 data_list[i]->book_size *= 2; 9836 9837 9838 } else { 9839 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { 9840 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 9841 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); 9842 } 9843 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 9844 (uint32_t) (data_list[i]->send_size + 9845 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); 9846 } 9847 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 9848 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND, 9849 data_list[i]->whoTo->flight_size, 9850 data_list[i]->book_size, 9851 (uintptr_t) data_list[i]->whoTo, 9852 data_list[i]->rec.data.TSN_seq); 9853 } 9854 sctp_flight_size_increase(data_list[i]); 9855 sctp_total_flight_increase(stcb, data_list[i]); 9856 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 9857 /* SWS sender side engages */ 9858 asoc->peers_rwnd = 0; 9859 } 9860 if ((i == 0) && 9861 (data_list[i]->rec.data.doing_fast_retransmit)) { 9862 SCTP_STAT_INCR(sctps_sendfastretrans); 9863 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) && 9864 (tmr_started == 0)) { 9865 /*- 9866 * ok we just fast-retrans'd 9867 * the lowest TSN, i.e the 9868 * first on the list. In 9869 * this case we want to give 9870 * some more time to get a 9871 * SACK back without a 9872 * t3-expiring. 9873 */ 9874 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net, 9875 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4); 9876 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 9877 } 9878 } 9879 } 9880 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 9881 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND); 9882 } 9883#ifdef SCTP_AUDITING_ENABLED 9884 sctp_auditing(21, inp, stcb, NULL); 9885#endif 9886 } else { 9887 /* None will fit */ 9888 return (1); 9889 } 9890 if (asoc->sent_queue_retran_cnt <= 0) { 9891 /* all done we have no more to retran */ 9892 asoc->sent_queue_retran_cnt = 0; 9893 break; 9894 } 9895 if (one_chunk) { 9896 /* No more room in rwnd */ 9897 return (1); 9898 } 9899 /* stop the for loop here. we sent out a packet */ 9900 break; 9901 } 9902 return (0); 9903} 9904 9905static void 9906sctp_timer_validation(struct sctp_inpcb *inp, 9907 struct sctp_tcb *stcb, 9908 struct sctp_association *asoc) 9909{ 9910 struct sctp_nets *net; 9911 9912 /* Validate that a timer is running somewhere */ 9913 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 9914 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 9915 /* Here is a timer */ 9916 return; 9917 } 9918 } 9919 SCTP_TCB_LOCK_ASSERT(stcb); 9920 /* Gak, we did not have a timer somewhere */ 9921 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n"); 9922 if (asoc->alternate) { 9923 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate); 9924 } else { 9925 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination); 9926 } 9927 return; 9928} 9929 9930void 9931sctp_chunk_output(struct sctp_inpcb *inp, 9932 struct sctp_tcb *stcb, 9933 int from_where, 9934 int so_locked 9935#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 9936 SCTP_UNUSED 9937#endif 9938) 9939{ 9940 /*- 9941 * Ok this is the generic chunk service queue. we must do the 9942 * following: 9943 * - See if there are retransmits pending, if so we must 9944 * do these first. 9945 * - Service the stream queue that is next, moving any 9946 * message (note I must get a complete message i.e. 9947 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning 9948 * TSN's 9949 * - Check to see if the cwnd/rwnd allows any output, if so we 9950 * go ahead and fomulate and send the low level chunks. Making sure 9951 * to combine any control in the control chunk queue also. 9952 */ 9953 struct sctp_association *asoc; 9954 struct sctp_nets *net; 9955 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0; 9956 unsigned int burst_cnt = 0; 9957 struct timeval now; 9958 int now_filled = 0; 9959 int nagle_on; 9960 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 9961 int un_sent = 0; 9962 int fr_done; 9963 unsigned int tot_frs = 0; 9964 9965 asoc = &stcb->asoc; 9966 /* The Nagle algorithm is only applied when handling a send call. */ 9967 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) { 9968 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) { 9969 nagle_on = 0; 9970 } else { 9971 nagle_on = 1; 9972 } 9973 } else { 9974 nagle_on = 0; 9975 } 9976 SCTP_TCB_LOCK_ASSERT(stcb); 9977 9978 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); 9979 9980 if ((un_sent <= 0) && 9981 (TAILQ_EMPTY(&asoc->control_send_queue)) && 9982 (TAILQ_EMPTY(&asoc->asconf_send_queue)) && 9983 (asoc->sent_queue_retran_cnt == 0)) { 9984 /* Nothing to do unless there is something to be sent left */ 9985 return; 9986 } 9987 /* 9988 * Do we have something to send, data or control AND a sack timer 9989 * running, if so piggy-back the sack. 9990 */ 9991 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 9992 sctp_send_sack(stcb, so_locked); 9993 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 9994 } 9995 while (asoc->sent_queue_retran_cnt) { 9996 /*- 9997 * Ok, it is retransmission time only, we send out only ONE 9998 * packet with a single call off to the retran code. 9999 */ 10000 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) { 10001 /*- 10002 * Special hook for handling cookiess discarded 10003 * by peer that carried data. Send cookie-ack only 10004 * and then the next call with get the retran's. 10005 */ 10006 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 10007 from_where, 10008 &now, &now_filled, frag_point, so_locked); 10009 return; 10010 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) { 10011 /* if its not from a HB then do it */ 10012 fr_done = 0; 10013 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked); 10014 if (fr_done) { 10015 tot_frs++; 10016 } 10017 } else { 10018 /* 10019 * its from any other place, we don't allow retran 10020 * output (only control) 10021 */ 10022 ret = 1; 10023 } 10024 if (ret > 0) { 10025 /* Can't send anymore */ 10026 /*- 10027 * now lets push out control by calling med-level 10028 * output once. this assures that we WILL send HB's 10029 * if queued too. 10030 */ 10031 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 10032 from_where, 10033 &now, &now_filled, frag_point, so_locked); 10034#ifdef SCTP_AUDITING_ENABLED 10035 sctp_auditing(8, inp, stcb, NULL); 10036#endif 10037 sctp_timer_validation(inp, stcb, asoc); 10038 return; 10039 } 10040 if (ret < 0) { 10041 /*- 10042 * The count was off.. retran is not happening so do 10043 * the normal retransmission. 10044 */ 10045#ifdef SCTP_AUDITING_ENABLED 10046 sctp_auditing(9, inp, stcb, NULL); 10047#endif 10048 if (ret == SCTP_RETRAN_EXIT) { 10049 return; 10050 } 10051 break; 10052 } 10053 if (from_where == SCTP_OUTPUT_FROM_T3) { 10054 /* Only one transmission allowed out of a timeout */ 10055#ifdef SCTP_AUDITING_ENABLED 10056 sctp_auditing(10, inp, stcb, NULL); 10057#endif 10058 /* Push out any control */ 10059 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where, 10060 &now, &now_filled, frag_point, so_locked); 10061 return; 10062 } 10063 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) { 10064 /* Hit FR burst limit */ 10065 return; 10066 } 10067 if ((num_out == 0) && (ret == 0)) { 10068 /* No more retrans to send */ 10069 break; 10070 } 10071 } 10072#ifdef SCTP_AUDITING_ENABLED 10073 sctp_auditing(12, inp, stcb, NULL); 10074#endif 10075 /* Check for bad destinations, if they exist move chunks around. */ 10076 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 10077 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 10078 /*- 10079 * if possible move things off of this address we 10080 * still may send below due to the dormant state but 10081 * we try to find an alternate address to send to 10082 * and if we have one we move all queued data on the 10083 * out wheel to this alternate address. 10084 */ 10085 if (net->ref_count > 1) 10086 sctp_move_chunks_from_net(stcb, net); 10087 } else { 10088 /*- 10089 * if ((asoc->sat_network) || (net->addr_is_local)) 10090 * { burst_limit = asoc->max_burst * 10091 * SCTP_SAT_NETWORK_BURST_INCR; } 10092 */ 10093 if (asoc->max_burst > 0) { 10094 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) { 10095 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) { 10096 /* 10097 * JRS - Use the congestion 10098 * control given in the 10099 * congestion control module 10100 */ 10101 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst); 10102 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10103 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED); 10104 } 10105 SCTP_STAT_INCR(sctps_maxburstqueued); 10106 } 10107 net->fast_retran_ip = 0; 10108 } else { 10109 if (net->flight_size == 0) { 10110 /* 10111 * Should be decaying the 10112 * cwnd here 10113 */ 10114 ; 10115 } 10116 } 10117 } 10118 } 10119 10120 } 10121 burst_cnt = 0; 10122 do { 10123 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out, 10124 &reason_code, 0, from_where, 10125 &now, &now_filled, frag_point, so_locked); 10126 if (error) { 10127 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error); 10128 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10129 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP); 10130 } 10131 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10132 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES); 10133 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES); 10134 } 10135 break; 10136 } 10137 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out); 10138 10139 tot_out += num_out; 10140 burst_cnt++; 10141 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10142 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES); 10143 if (num_out == 0) { 10144 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES); 10145 } 10146 } 10147 if (nagle_on) { 10148 /* 10149 * When the Nagle algorithm is used, look at how 10150 * much is unsent, then if its smaller than an MTU 10151 * and we have data in flight we stop, except if we 10152 * are handling a fragmented user message. 10153 */ 10154 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 10155 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 10156 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) && 10157 (stcb->asoc.total_flight > 0) && 10158 ((stcb->asoc.locked_on_sending == NULL) || 10159 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { 10160 break; 10161 } 10162 } 10163 if (TAILQ_EMPTY(&asoc->control_send_queue) && 10164 TAILQ_EMPTY(&asoc->send_queue) && 10165 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { 10166 /* Nothing left to send */ 10167 break; 10168 } 10169 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) { 10170 /* Nothing left to send */ 10171 break; 10172 } 10173 } while (num_out && 10174 ((asoc->max_burst == 0) || 10175 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) || 10176 (burst_cnt < asoc->max_burst))); 10177 10178 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) { 10179 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) { 10180 SCTP_STAT_INCR(sctps_maxburstqueued); 10181 asoc->burst_limit_applied = 1; 10182 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10183 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED); 10184 } 10185 } else { 10186 asoc->burst_limit_applied = 0; 10187 } 10188 } 10189 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10190 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES); 10191 } 10192 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n", 10193 tot_out); 10194 10195 /*- 10196 * Now we need to clean up the control chunk chain if a ECNE is on 10197 * it. It must be marked as UNSENT again so next call will continue 10198 * to send it until such time that we get a CWR, to remove it. 10199 */ 10200 if (stcb->asoc.ecn_echo_cnt_onq) 10201 sctp_fix_ecn_echo(asoc); 10202 return; 10203} 10204 10205 10206int 10207sctp_output( 10208 struct sctp_inpcb *inp, 10209 struct mbuf *m, 10210 struct sockaddr *addr, 10211 struct mbuf *control, 10212 struct thread *p, 10213 int flags) 10214{ 10215 if (inp == NULL) { 10216 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 10217 return (EINVAL); 10218 } 10219 if (inp->sctp_socket == NULL) { 10220 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 10221 return (EINVAL); 10222 } 10223 return (sctp_sosend(inp->sctp_socket, 10224 addr, 10225 (struct uio *)NULL, 10226 m, 10227 control, 10228 flags, p 10229 )); 10230} 10231 10232void 10233send_forward_tsn(struct sctp_tcb *stcb, 10234 struct sctp_association *asoc) 10235{ 10236 struct sctp_tmit_chunk *chk; 10237 struct sctp_forward_tsn_chunk *fwdtsn; 10238 uint32_t advance_peer_ack_point; 10239 10240 SCTP_TCB_LOCK_ASSERT(stcb); 10241 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 10242 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 10243 /* mark it to unsent */ 10244 chk->sent = SCTP_DATAGRAM_UNSENT; 10245 chk->snd_count = 0; 10246 /* Do we correct its output location? */ 10247 if (chk->whoTo) { 10248 sctp_free_remote_addr(chk->whoTo); 10249 chk->whoTo = NULL; 10250 } 10251 goto sctp_fill_in_rest; 10252 } 10253 } 10254 /* Ok if we reach here we must build one */ 10255 sctp_alloc_a_chunk(stcb, chk); 10256 if (chk == NULL) { 10257 return; 10258 } 10259 asoc->fwd_tsn_cnt++; 10260 chk->copy_by_ref = 0; 10261 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN; 10262 chk->rec.chunk_id.can_take_data = 0; 10263 chk->flags = 0; 10264 chk->asoc = asoc; 10265 chk->whoTo = NULL; 10266 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 10267 if (chk->data == NULL) { 10268 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 10269 return; 10270 } 10271 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 10272 chk->sent = SCTP_DATAGRAM_UNSENT; 10273 chk->snd_count = 0; 10274 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next); 10275 asoc->ctrl_queue_cnt++; 10276sctp_fill_in_rest: 10277 /*- 10278 * Here we go through and fill out the part that deals with 10279 * stream/seq of the ones we skip. 10280 */ 10281 SCTP_BUF_LEN(chk->data) = 0; 10282 { 10283 struct sctp_tmit_chunk *at, *tp1, *last; 10284 struct sctp_strseq *strseq; 10285 unsigned int cnt_of_space, i, ovh; 10286 unsigned int space_needed; 10287 unsigned int cnt_of_skipped = 0; 10288 10289 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) { 10290 if ((at->sent != SCTP_FORWARD_TSN_SKIP) && 10291 (at->sent != SCTP_DATAGRAM_NR_ACKED)) { 10292 /* no more to look at */ 10293 break; 10294 } 10295 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 10296 /* We don't report these */ 10297 continue; 10298 } 10299 cnt_of_skipped++; 10300 } 10301 space_needed = (sizeof(struct sctp_forward_tsn_chunk) + 10302 (cnt_of_skipped * sizeof(struct sctp_strseq))); 10303 10304 cnt_of_space = M_TRAILINGSPACE(chk->data); 10305 10306 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 10307 ovh = SCTP_MIN_OVERHEAD; 10308 } else { 10309 ovh = SCTP_MIN_V4_OVERHEAD; 10310 } 10311 if (cnt_of_space > (asoc->smallest_mtu - ovh)) { 10312 /* trim to a mtu size */ 10313 cnt_of_space = asoc->smallest_mtu - ovh; 10314 } 10315 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10316 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10317 0xff, 0, cnt_of_skipped, 10318 asoc->advanced_peer_ack_point); 10319 10320 } 10321 advance_peer_ack_point = asoc->advanced_peer_ack_point; 10322 if (cnt_of_space < space_needed) { 10323 /*- 10324 * ok we must trim down the chunk by lowering the 10325 * advance peer ack point. 10326 */ 10327 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10328 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10329 0xff, 0xff, cnt_of_space, 10330 space_needed); 10331 } 10332 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk); 10333 cnt_of_skipped /= sizeof(struct sctp_strseq); 10334 /*- 10335 * Go through and find the TSN that will be the one 10336 * we report. 10337 */ 10338 at = TAILQ_FIRST(&asoc->sent_queue); 10339 if (at != NULL) { 10340 for (i = 0; i < cnt_of_skipped; i++) { 10341 tp1 = TAILQ_NEXT(at, sctp_next); 10342 if (tp1 == NULL) { 10343 break; 10344 } 10345 at = tp1; 10346 } 10347 } 10348 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10349 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10350 0xff, cnt_of_skipped, at->rec.data.TSN_seq, 10351 asoc->advanced_peer_ack_point); 10352 } 10353 last = at; 10354 /*- 10355 * last now points to last one I can report, update 10356 * peer ack point 10357 */ 10358 if (last) 10359 advance_peer_ack_point = last->rec.data.TSN_seq; 10360 space_needed = sizeof(struct sctp_forward_tsn_chunk) + 10361 cnt_of_skipped * sizeof(struct sctp_strseq); 10362 } 10363 chk->send_size = space_needed; 10364 /* Setup the chunk */ 10365 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *); 10366 fwdtsn->ch.chunk_length = htons(chk->send_size); 10367 fwdtsn->ch.chunk_flags = 0; 10368 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN; 10369 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point); 10370 SCTP_BUF_LEN(chk->data) = chk->send_size; 10371 fwdtsn++; 10372 /*- 10373 * Move pointer to after the fwdtsn and transfer to the 10374 * strseq pointer. 10375 */ 10376 strseq = (struct sctp_strseq *)fwdtsn; 10377 /*- 10378 * Now populate the strseq list. This is done blindly 10379 * without pulling out duplicate stream info. This is 10380 * inefficent but won't harm the process since the peer will 10381 * look at these in sequence and will thus release anything. 10382 * It could mean we exceed the PMTU and chop off some that 10383 * we could have included.. but this is unlikely (aka 1432/4 10384 * would mean 300+ stream seq's would have to be reported in 10385 * one FWD-TSN. With a bit of work we can later FIX this to 10386 * optimize and pull out duplcates.. but it does add more 10387 * overhead. So for now... not! 10388 */ 10389 at = TAILQ_FIRST(&asoc->sent_queue); 10390 for (i = 0; i < cnt_of_skipped; i++) { 10391 tp1 = TAILQ_NEXT(at, sctp_next); 10392 if (tp1 == NULL) 10393 break; 10394 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 10395 /* We don't report these */ 10396 i--; 10397 at = tp1; 10398 continue; 10399 } 10400 if (at->rec.data.TSN_seq == advance_peer_ack_point) { 10401 at->rec.data.fwd_tsn_cnt = 0; 10402 } 10403 strseq->stream = ntohs(at->rec.data.stream_number); 10404 strseq->sequence = ntohs(at->rec.data.stream_seq); 10405 strseq++; 10406 at = tp1; 10407 } 10408 } 10409 return; 10410} 10411 10412void 10413sctp_send_sack(struct sctp_tcb *stcb, int so_locked 10414#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 10415 SCTP_UNUSED 10416#endif 10417) 10418{ 10419 /*- 10420 * Queue up a SACK or NR-SACK in the control queue. 10421 * We must first check to see if a SACK or NR-SACK is 10422 * somehow on the control queue. 10423 * If so, we will take and and remove the old one. 10424 */ 10425 struct sctp_association *asoc; 10426 struct sctp_tmit_chunk *chk, *a_chk; 10427 struct sctp_sack_chunk *sack; 10428 struct sctp_nr_sack_chunk *nr_sack; 10429 struct sctp_gap_ack_block *gap_descriptor; 10430 struct sack_track *selector; 10431 int mergeable = 0; 10432 int offset; 10433 caddr_t limit; 10434 uint32_t *dup; 10435 int limit_reached = 0; 10436 unsigned int i, siz, j; 10437 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space; 10438 int num_dups = 0; 10439 int space_req; 10440 uint32_t highest_tsn; 10441 uint8_t flags; 10442 uint8_t type; 10443 uint8_t tsn_map; 10444 10445 if (stcb->asoc.nrsack_supported == 1) { 10446 type = SCTP_NR_SELECTIVE_ACK; 10447 } else { 10448 type = SCTP_SELECTIVE_ACK; 10449 } 10450 a_chk = NULL; 10451 asoc = &stcb->asoc; 10452 SCTP_TCB_LOCK_ASSERT(stcb); 10453 if (asoc->last_data_chunk_from == NULL) { 10454 /* Hmm we never received anything */ 10455 return; 10456 } 10457 sctp_slide_mapping_arrays(stcb); 10458 sctp_set_rwnd(stcb, asoc); 10459 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 10460 if (chk->rec.chunk_id.id == type) { 10461 /* Hmm, found a sack already on queue, remove it */ 10462 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 10463 asoc->ctrl_queue_cnt--; 10464 a_chk = chk; 10465 if (a_chk->data) { 10466 sctp_m_freem(a_chk->data); 10467 a_chk->data = NULL; 10468 } 10469 if (a_chk->whoTo) { 10470 sctp_free_remote_addr(a_chk->whoTo); 10471 a_chk->whoTo = NULL; 10472 } 10473 break; 10474 } 10475 } 10476 if (a_chk == NULL) { 10477 sctp_alloc_a_chunk(stcb, a_chk); 10478 if (a_chk == NULL) { 10479 /* No memory so we drop the idea, and set a timer */ 10480 if (stcb->asoc.delayed_ack) { 10481 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 10482 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5); 10483 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 10484 stcb->sctp_ep, stcb, NULL); 10485 } else { 10486 stcb->asoc.send_sack = 1; 10487 } 10488 return; 10489 } 10490 a_chk->copy_by_ref = 0; 10491 a_chk->rec.chunk_id.id = type; 10492 a_chk->rec.chunk_id.can_take_data = 1; 10493 } 10494 /* Clear our pkt counts */ 10495 asoc->data_pkts_seen = 0; 10496 10497 a_chk->flags = 0; 10498 a_chk->asoc = asoc; 10499 a_chk->snd_count = 0; 10500 a_chk->send_size = 0; /* fill in later */ 10501 a_chk->sent = SCTP_DATAGRAM_UNSENT; 10502 a_chk->whoTo = NULL; 10503 10504 if ((asoc->numduptsns) || 10505 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) { 10506 /*- 10507 * Ok, we have some duplicates or the destination for the 10508 * sack is unreachable, lets see if we can select an 10509 * alternate than asoc->last_data_chunk_from 10510 */ 10511 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) && 10512 (asoc->used_alt_onsack > asoc->numnets)) { 10513 /* We used an alt last time, don't this time */ 10514 a_chk->whoTo = NULL; 10515 } else { 10516 asoc->used_alt_onsack++; 10517 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0); 10518 } 10519 if (a_chk->whoTo == NULL) { 10520 /* Nope, no alternate */ 10521 a_chk->whoTo = asoc->last_data_chunk_from; 10522 asoc->used_alt_onsack = 0; 10523 } 10524 } else { 10525 /* 10526 * No duplicates so we use the last place we received data 10527 * from. 10528 */ 10529 asoc->used_alt_onsack = 0; 10530 a_chk->whoTo = asoc->last_data_chunk_from; 10531 } 10532 if (a_chk->whoTo) { 10533 atomic_add_int(&a_chk->whoTo->ref_count, 1); 10534 } 10535 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) { 10536 highest_tsn = asoc->highest_tsn_inside_map; 10537 } else { 10538 highest_tsn = asoc->highest_tsn_inside_nr_map; 10539 } 10540 if (highest_tsn == asoc->cumulative_tsn) { 10541 /* no gaps */ 10542 if (type == SCTP_SELECTIVE_ACK) { 10543 space_req = sizeof(struct sctp_sack_chunk); 10544 } else { 10545 space_req = sizeof(struct sctp_nr_sack_chunk); 10546 } 10547 } else { 10548 /* gaps get a cluster */ 10549 space_req = MCLBYTES; 10550 } 10551 /* Ok now lets formulate a MBUF with our sack */ 10552 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA); 10553 if ((a_chk->data == NULL) || 10554 (a_chk->whoTo == NULL)) { 10555 /* rats, no mbuf memory */ 10556 if (a_chk->data) { 10557 /* was a problem with the destination */ 10558 sctp_m_freem(a_chk->data); 10559 a_chk->data = NULL; 10560 } 10561 sctp_free_a_chunk(stcb, a_chk, so_locked); 10562 /* sa_ignore NO_NULL_CHK */ 10563 if (stcb->asoc.delayed_ack) { 10564 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 10565 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6); 10566 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 10567 stcb->sctp_ep, stcb, NULL); 10568 } else { 10569 stcb->asoc.send_sack = 1; 10570 } 10571 return; 10572 } 10573 /* ok, lets go through and fill it in */ 10574 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD); 10575 space = M_TRAILINGSPACE(a_chk->data); 10576 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) { 10577 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD); 10578 } 10579 limit = mtod(a_chk->data, caddr_t); 10580 limit += space; 10581 10582 flags = 0; 10583 10584 if ((asoc->sctp_cmt_on_off > 0) && 10585 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) { 10586 /*- 10587 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been 10588 * received, then set high bit to 1, else 0. Reset 10589 * pkts_rcvd. 10590 */ 10591 flags |= (asoc->cmt_dac_pkts_rcvd << 6); 10592 asoc->cmt_dac_pkts_rcvd = 0; 10593 } 10594#ifdef SCTP_ASOCLOG_OF_TSNS 10595 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn; 10596 stcb->asoc.cumack_log_atsnt++; 10597 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) { 10598 stcb->asoc.cumack_log_atsnt = 0; 10599 } 10600#endif 10601 /* reset the readers interpretation */ 10602 stcb->freed_by_sorcv_sincelast = 0; 10603 10604 if (type == SCTP_SELECTIVE_ACK) { 10605 sack = mtod(a_chk->data, struct sctp_sack_chunk *); 10606 nr_sack = NULL; 10607 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk)); 10608 if (highest_tsn > asoc->mapping_array_base_tsn) { 10609 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10610 } else { 10611 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8; 10612 } 10613 } else { 10614 sack = NULL; 10615 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *); 10616 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk)); 10617 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) { 10618 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10619 } else { 10620 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8; 10621 } 10622 } 10623 10624 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { 10625 offset = 1; 10626 } else { 10627 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; 10628 } 10629 if (((type == SCTP_SELECTIVE_ACK) && 10630 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) || 10631 ((type == SCTP_NR_SELECTIVE_ACK) && 10632 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) { 10633 /* we have a gap .. maybe */ 10634 for (i = 0; i < siz; i++) { 10635 tsn_map = asoc->mapping_array[i]; 10636 if (type == SCTP_SELECTIVE_ACK) { 10637 tsn_map |= asoc->nr_mapping_array[i]; 10638 } 10639 if (i == 0) { 10640 /* 10641 * Clear all bits corresponding to TSNs 10642 * smaller or equal to the cumulative TSN. 10643 */ 10644 tsn_map &= (~0 << (1 - offset)); 10645 } 10646 selector = &sack_array[tsn_map]; 10647 if (mergeable && selector->right_edge) { 10648 /* 10649 * Backup, left and right edges were ok to 10650 * merge. 10651 */ 10652 num_gap_blocks--; 10653 gap_descriptor--; 10654 } 10655 if (selector->num_entries == 0) 10656 mergeable = 0; 10657 else { 10658 for (j = 0; j < selector->num_entries; j++) { 10659 if (mergeable && selector->right_edge) { 10660 /* 10661 * do a merge by NOT setting 10662 * the left side 10663 */ 10664 mergeable = 0; 10665 } else { 10666 /* 10667 * no merge, set the left 10668 * side 10669 */ 10670 mergeable = 0; 10671 gap_descriptor->start = htons((selector->gaps[j].start + offset)); 10672 } 10673 gap_descriptor->end = htons((selector->gaps[j].end + offset)); 10674 num_gap_blocks++; 10675 gap_descriptor++; 10676 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { 10677 /* no more room */ 10678 limit_reached = 1; 10679 break; 10680 } 10681 } 10682 if (selector->left_edge) { 10683 mergeable = 1; 10684 } 10685 } 10686 if (limit_reached) { 10687 /* Reached the limit stop */ 10688 break; 10689 } 10690 offset += 8; 10691 } 10692 } 10693 if ((type == SCTP_NR_SELECTIVE_ACK) && 10694 (limit_reached == 0)) { 10695 10696 mergeable = 0; 10697 10698 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) { 10699 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10700 } else { 10701 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8; 10702 } 10703 10704 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { 10705 offset = 1; 10706 } else { 10707 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; 10708 } 10709 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) { 10710 /* we have a gap .. maybe */ 10711 for (i = 0; i < siz; i++) { 10712 tsn_map = asoc->nr_mapping_array[i]; 10713 if (i == 0) { 10714 /* 10715 * Clear all bits corresponding to 10716 * TSNs smaller or equal to the 10717 * cumulative TSN. 10718 */ 10719 tsn_map &= (~0 << (1 - offset)); 10720 } 10721 selector = &sack_array[tsn_map]; 10722 if (mergeable && selector->right_edge) { 10723 /* 10724 * Backup, left and right edges were 10725 * ok to merge. 10726 */ 10727 num_nr_gap_blocks--; 10728 gap_descriptor--; 10729 } 10730 if (selector->num_entries == 0) 10731 mergeable = 0; 10732 else { 10733 for (j = 0; j < selector->num_entries; j++) { 10734 if (mergeable && selector->right_edge) { 10735 /* 10736 * do a merge by NOT 10737 * setting the left 10738 * side 10739 */ 10740 mergeable = 0; 10741 } else { 10742 /* 10743 * no merge, set the 10744 * left side 10745 */ 10746 mergeable = 0; 10747 gap_descriptor->start = htons((selector->gaps[j].start + offset)); 10748 } 10749 gap_descriptor->end = htons((selector->gaps[j].end + offset)); 10750 num_nr_gap_blocks++; 10751 gap_descriptor++; 10752 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { 10753 /* no more room */ 10754 limit_reached = 1; 10755 break; 10756 } 10757 } 10758 if (selector->left_edge) { 10759 mergeable = 1; 10760 } 10761 } 10762 if (limit_reached) { 10763 /* Reached the limit stop */ 10764 break; 10765 } 10766 offset += 8; 10767 } 10768 } 10769 } 10770 /* now we must add any dups we are going to report. */ 10771 if ((limit_reached == 0) && (asoc->numduptsns)) { 10772 dup = (uint32_t *) gap_descriptor; 10773 for (i = 0; i < asoc->numduptsns; i++) { 10774 *dup = htonl(asoc->dup_tsns[i]); 10775 dup++; 10776 num_dups++; 10777 if (((caddr_t)dup + sizeof(uint32_t)) > limit) { 10778 /* no more room */ 10779 break; 10780 } 10781 } 10782 asoc->numduptsns = 0; 10783 } 10784 /* 10785 * now that the chunk is prepared queue it to the control chunk 10786 * queue. 10787 */ 10788 if (type == SCTP_SELECTIVE_ACK) { 10789 a_chk->send_size = sizeof(struct sctp_sack_chunk) + 10790 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + 10791 num_dups * sizeof(int32_t); 10792 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; 10793 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); 10794 sack->sack.a_rwnd = htonl(asoc->my_rwnd); 10795 sack->sack.num_gap_ack_blks = htons(num_gap_blocks); 10796 sack->sack.num_dup_tsns = htons(num_dups); 10797 sack->ch.chunk_type = type; 10798 sack->ch.chunk_flags = flags; 10799 sack->ch.chunk_length = htons(a_chk->send_size); 10800 } else { 10801 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) + 10802 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + 10803 num_dups * sizeof(int32_t); 10804 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; 10805 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); 10806 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd); 10807 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks); 10808 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks); 10809 nr_sack->nr_sack.num_dup_tsns = htons(num_dups); 10810 nr_sack->nr_sack.reserved = 0; 10811 nr_sack->ch.chunk_type = type; 10812 nr_sack->ch.chunk_flags = flags; 10813 nr_sack->ch.chunk_length = htons(a_chk->send_size); 10814 } 10815 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next); 10816 asoc->my_last_reported_rwnd = asoc->my_rwnd; 10817 asoc->ctrl_queue_cnt++; 10818 asoc->send_sack = 0; 10819 SCTP_STAT_INCR(sctps_sendsacks); 10820 return; 10821} 10822 10823void 10824sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked 10825#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 10826 SCTP_UNUSED 10827#endif 10828) 10829{ 10830 struct mbuf *m_abort, *m, *m_last; 10831 struct mbuf *m_out, *m_end = NULL; 10832 struct sctp_abort_chunk *abort; 10833 struct sctp_auth_chunk *auth = NULL; 10834 struct sctp_nets *net; 10835 uint32_t vtag; 10836 uint32_t auth_offset = 0; 10837 uint16_t cause_len, chunk_len, padding_len; 10838 10839 SCTP_TCB_LOCK_ASSERT(stcb); 10840 /*- 10841 * Add an AUTH chunk, if chunk requires it and save the offset into 10842 * the chain for AUTH 10843 */ 10844 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION, 10845 stcb->asoc.peer_auth_chunks)) { 10846 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset, 10847 stcb, SCTP_ABORT_ASSOCIATION); 10848 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10849 } else { 10850 m_out = NULL; 10851 } 10852 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER); 10853 if (m_abort == NULL) { 10854 if (m_out) { 10855 sctp_m_freem(m_out); 10856 } 10857 if (operr) { 10858 sctp_m_freem(operr); 10859 } 10860 return; 10861 } 10862 /* link in any error */ 10863 SCTP_BUF_NEXT(m_abort) = operr; 10864 cause_len = 0; 10865 m_last = NULL; 10866 for (m = operr; m; m = SCTP_BUF_NEXT(m)) { 10867 cause_len += (uint16_t) SCTP_BUF_LEN(m); 10868 if (SCTP_BUF_NEXT(m) == NULL) { 10869 m_last = m; 10870 } 10871 } 10872 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk); 10873 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len; 10874 padding_len = SCTP_SIZE32(chunk_len) - chunk_len; 10875 if (m_out == NULL) { 10876 /* NO Auth chunk prepended, so reserve space in front */ 10877 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD); 10878 m_out = m_abort; 10879 } else { 10880 /* Put AUTH chunk at the front of the chain */ 10881 SCTP_BUF_NEXT(m_end) = m_abort; 10882 } 10883 if (stcb->asoc.alternate) { 10884 net = stcb->asoc.alternate; 10885 } else { 10886 net = stcb->asoc.primary_destination; 10887 } 10888 /* Fill in the ABORT chunk header. */ 10889 abort = mtod(m_abort, struct sctp_abort_chunk *); 10890 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION; 10891 if (stcb->asoc.peer_vtag == 0) { 10892 /* This happens iff the assoc is in COOKIE-WAIT state. */ 10893 vtag = stcb->asoc.my_vtag; 10894 abort->ch.chunk_flags = SCTP_HAD_NO_TCB; 10895 } else { 10896 vtag = stcb->asoc.peer_vtag; 10897 abort->ch.chunk_flags = 0; 10898 } 10899 abort->ch.chunk_length = htons(chunk_len); 10900 /* Add padding, if necessary. */ 10901 if (padding_len > 0) { 10902 if ((m_last == NULL) || 10903 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) { 10904 sctp_m_freem(m_out); 10905 return; 10906 } 10907 } 10908 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, 10909 (struct sockaddr *)&net->ro._l_addr, 10910 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0, 10911 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag), 10912 stcb->asoc.primary_destination->port, NULL, 10913 0, 0, 10914 so_locked); 10915 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10916} 10917 10918void 10919sctp_send_shutdown_complete(struct sctp_tcb *stcb, 10920 struct sctp_nets *net, 10921 int reflect_vtag) 10922{ 10923 /* formulate and SEND a SHUTDOWN-COMPLETE */ 10924 struct mbuf *m_shutdown_comp; 10925 struct sctp_shutdown_complete_chunk *shutdown_complete; 10926 uint32_t vtag; 10927 uint8_t flags; 10928 10929 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER); 10930 if (m_shutdown_comp == NULL) { 10931 /* no mbuf's */ 10932 return; 10933 } 10934 if (reflect_vtag) { 10935 flags = SCTP_HAD_NO_TCB; 10936 vtag = stcb->asoc.my_vtag; 10937 } else { 10938 flags = 0; 10939 vtag = stcb->asoc.peer_vtag; 10940 } 10941 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *); 10942 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE; 10943 shutdown_complete->ch.chunk_flags = flags; 10944 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk)); 10945 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk); 10946 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, 10947 (struct sockaddr *)&net->ro._l_addr, 10948 m_shutdown_comp, 0, NULL, 0, 1, 0, 0, 10949 stcb->sctp_ep->sctp_lport, stcb->rport, 10950 htonl(vtag), 10951 net->port, NULL, 10952 0, 0, 10953 SCTP_SO_NOT_LOCKED); 10954 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10955 return; 10956} 10957 10958static void 10959sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst, 10960 struct sctphdr *sh, uint32_t vtag, 10961 uint8_t type, struct mbuf *cause, 10962 uint8_t use_mflowid, uint32_t mflowid, 10963 uint32_t vrf_id, uint16_t port) 10964{ 10965 struct mbuf *o_pak; 10966 struct mbuf *mout; 10967 struct sctphdr *shout; 10968 struct sctp_chunkhdr *ch; 10969 10970#if defined(INET) || defined(INET6) 10971 struct udphdr *udp; 10972 int ret; 10973 10974#endif 10975 int len, cause_len, padding_len; 10976 10977#ifdef INET 10978 struct sockaddr_in *src_sin, *dst_sin; 10979 struct ip *ip; 10980 10981#endif 10982#ifdef INET6 10983 struct sockaddr_in6 *src_sin6, *dst_sin6; 10984 struct ip6_hdr *ip6; 10985 10986#endif 10987 10988 /* Compute the length of the cause and add final padding. */ 10989 cause_len = 0; 10990 if (cause != NULL) { 10991 struct mbuf *m_at, *m_last = NULL; 10992 10993 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 10994 if (SCTP_BUF_NEXT(m_at) == NULL) 10995 m_last = m_at; 10996 cause_len += SCTP_BUF_LEN(m_at); 10997 } 10998 padding_len = cause_len % 4; 10999 if (padding_len != 0) { 11000 padding_len = 4 - padding_len; 11001 } 11002 if (padding_len != 0) { 11003 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 11004 sctp_m_freem(cause); 11005 return; 11006 } 11007 } 11008 } else { 11009 padding_len = 0; 11010 } 11011 /* Get an mbuf for the header. */ 11012 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 11013 switch (dst->sa_family) { 11014#ifdef INET 11015 case AF_INET: 11016 len += sizeof(struct ip); 11017 break; 11018#endif 11019#ifdef INET6 11020 case AF_INET6: 11021 len += sizeof(struct ip6_hdr); 11022 break; 11023#endif 11024 default: 11025 break; 11026 } 11027#if defined(INET) || defined(INET6) 11028 if (port) { 11029 len += sizeof(struct udphdr); 11030 } 11031#endif 11032 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA); 11033 if (mout == NULL) { 11034 if (cause) { 11035 sctp_m_freem(cause); 11036 } 11037 return; 11038 } 11039 SCTP_BUF_RESV_UF(mout, max_linkhdr); 11040 SCTP_BUF_LEN(mout) = len; 11041 SCTP_BUF_NEXT(mout) = cause; 11042 if (use_mflowid != 0) { 11043 mout->m_pkthdr.flowid = mflowid; 11044 mout->m_flags |= M_FLOWID; 11045 } 11046#ifdef INET 11047 ip = NULL; 11048#endif 11049#ifdef INET6 11050 ip6 = NULL; 11051#endif 11052 switch (dst->sa_family) { 11053#ifdef INET 11054 case AF_INET: 11055 src_sin = (struct sockaddr_in *)src; 11056 dst_sin = (struct sockaddr_in *)dst; 11057 ip = mtod(mout, struct ip *); 11058 ip->ip_v = IPVERSION; 11059 ip->ip_hl = (sizeof(struct ip) >> 2); 11060 ip->ip_tos = 0; 11061 ip->ip_id = ip_newid(); 11062 ip->ip_off = 0; 11063 ip->ip_ttl = MODULE_GLOBAL(ip_defttl); 11064 if (port) { 11065 ip->ip_p = IPPROTO_UDP; 11066 } else { 11067 ip->ip_p = IPPROTO_SCTP; 11068 } 11069 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr; 11070 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr; 11071 ip->ip_sum = 0; 11072 len = sizeof(struct ip); 11073 shout = (struct sctphdr *)((caddr_t)ip + len); 11074 break; 11075#endif 11076#ifdef INET6 11077 case AF_INET6: 11078 src_sin6 = (struct sockaddr_in6 *)src; 11079 dst_sin6 = (struct sockaddr_in6 *)dst; 11080 ip6 = mtod(mout, struct ip6_hdr *); 11081 ip6->ip6_flow = htonl(0x60000000); 11082 if (V_ip6_auto_flowlabel) { 11083 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 11084 } 11085 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim); 11086 if (port) { 11087 ip6->ip6_nxt = IPPROTO_UDP; 11088 } else { 11089 ip6->ip6_nxt = IPPROTO_SCTP; 11090 } 11091 ip6->ip6_src = dst_sin6->sin6_addr; 11092 ip6->ip6_dst = src_sin6->sin6_addr; 11093 len = sizeof(struct ip6_hdr); 11094 shout = (struct sctphdr *)((caddr_t)ip6 + len); 11095 break; 11096#endif 11097 default: 11098 len = 0; 11099 shout = mtod(mout, struct sctphdr *); 11100 break; 11101 } 11102#if defined(INET) || defined(INET6) 11103 if (port) { 11104 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 11105 sctp_m_freem(mout); 11106 return; 11107 } 11108 udp = (struct udphdr *)shout; 11109 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 11110 udp->uh_dport = port; 11111 udp->uh_sum = 0; 11112 udp->uh_ulen = htons(sizeof(struct udphdr) + 11113 sizeof(struct sctphdr) + 11114 sizeof(struct sctp_chunkhdr) + 11115 cause_len + padding_len); 11116 len += sizeof(struct udphdr); 11117 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr)); 11118 } else { 11119 udp = NULL; 11120 } 11121#endif 11122 shout->src_port = sh->dest_port; 11123 shout->dest_port = sh->src_port; 11124 shout->checksum = 0; 11125 if (vtag) { 11126 shout->v_tag = htonl(vtag); 11127 } else { 11128 shout->v_tag = sh->v_tag; 11129 } 11130 len += sizeof(struct sctphdr); 11131 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr)); 11132 ch->chunk_type = type; 11133 if (vtag) { 11134 ch->chunk_flags = 0; 11135 } else { 11136 ch->chunk_flags = SCTP_HAD_NO_TCB; 11137 } 11138 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len); 11139 len += sizeof(struct sctp_chunkhdr); 11140 len += cause_len + padding_len; 11141 11142 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 11143 sctp_m_freem(mout); 11144 return; 11145 } 11146 SCTP_ATTACH_CHAIN(o_pak, mout, len); 11147 switch (dst->sa_family) { 11148#ifdef INET 11149 case AF_INET: 11150 if (port) { 11151 if (V_udp_cksum) { 11152 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 11153 } else { 11154 udp->uh_sum = 0; 11155 } 11156 } 11157 ip->ip_len = htons(len); 11158 if (port) { 11159#if defined(SCTP_WITH_NO_CSUM) 11160 SCTP_STAT_INCR(sctps_sendnocrc); 11161#else 11162 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr)); 11163 SCTP_STAT_INCR(sctps_sendswcrc); 11164#endif 11165 if (V_udp_cksum) { 11166 SCTP_ENABLE_UDP_CSUM(o_pak); 11167 } 11168 } else { 11169#if defined(SCTP_WITH_NO_CSUM) 11170 SCTP_STAT_INCR(sctps_sendnocrc); 11171#else 11172 mout->m_pkthdr.csum_flags = CSUM_SCTP; 11173 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 11174 SCTP_STAT_INCR(sctps_sendhwcrc); 11175#endif 11176 } 11177#ifdef SCTP_PACKET_LOGGING 11178 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 11179 sctp_packet_log(o_pak); 11180 } 11181#endif 11182 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id); 11183 break; 11184#endif 11185#ifdef INET6 11186 case AF_INET6: 11187 ip6->ip6_plen = len - sizeof(struct ip6_hdr); 11188 if (port) { 11189#if defined(SCTP_WITH_NO_CSUM) 11190 SCTP_STAT_INCR(sctps_sendnocrc); 11191#else 11192 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 11193 SCTP_STAT_INCR(sctps_sendswcrc); 11194#endif 11195 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) { 11196 udp->uh_sum = 0xffff; 11197 } 11198 } else { 11199#if defined(SCTP_WITH_NO_CSUM) 11200 SCTP_STAT_INCR(sctps_sendnocrc); 11201#else 11202 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6; 11203 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 11204 SCTP_STAT_INCR(sctps_sendhwcrc); 11205#endif 11206 } 11207#ifdef SCTP_PACKET_LOGGING 11208 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 11209 sctp_packet_log(o_pak); 11210 } 11211#endif 11212 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id); 11213 break; 11214#endif 11215 default: 11216 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n", 11217 dst->sa_family); 11218 sctp_m_freem(mout); 11219 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); 11220 return; 11221 } 11222 SCTP_STAT_INCR(sctps_sendpackets); 11223 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 11224 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 11225 return; 11226} 11227 11228void 11229sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst, 11230 struct sctphdr *sh, 11231 uint8_t use_mflowid, uint32_t mflowid, 11232 uint32_t vrf_id, uint16_t port) 11233{ 11234 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL, 11235 use_mflowid, mflowid, 11236 vrf_id, port); 11237} 11238 11239void 11240sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked 11241#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 11242 SCTP_UNUSED 11243#endif 11244) 11245{ 11246 struct sctp_tmit_chunk *chk; 11247 struct sctp_heartbeat_chunk *hb; 11248 struct timeval now; 11249 11250 SCTP_TCB_LOCK_ASSERT(stcb); 11251 if (net == NULL) { 11252 return; 11253 } 11254 (void)SCTP_GETTIME_TIMEVAL(&now); 11255 switch (net->ro._l_addr.sa.sa_family) { 11256#ifdef INET 11257 case AF_INET: 11258 break; 11259#endif 11260#ifdef INET6 11261 case AF_INET6: 11262 break; 11263#endif 11264 default: 11265 return; 11266 } 11267 sctp_alloc_a_chunk(stcb, chk); 11268 if (chk == NULL) { 11269 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n"); 11270 return; 11271 } 11272 chk->copy_by_ref = 0; 11273 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST; 11274 chk->rec.chunk_id.can_take_data = 1; 11275 chk->flags = 0; 11276 chk->asoc = &stcb->asoc; 11277 chk->send_size = sizeof(struct sctp_heartbeat_chunk); 11278 11279 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11280 if (chk->data == NULL) { 11281 sctp_free_a_chunk(stcb, chk, so_locked); 11282 return; 11283 } 11284 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11285 SCTP_BUF_LEN(chk->data) = chk->send_size; 11286 chk->sent = SCTP_DATAGRAM_UNSENT; 11287 chk->snd_count = 0; 11288 chk->whoTo = net; 11289 atomic_add_int(&chk->whoTo->ref_count, 1); 11290 /* Now we have a mbuf that we can fill in with the details */ 11291 hb = mtod(chk->data, struct sctp_heartbeat_chunk *); 11292 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk)); 11293 /* fill out chunk header */ 11294 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST; 11295 hb->ch.chunk_flags = 0; 11296 hb->ch.chunk_length = htons(chk->send_size); 11297 /* Fill out hb parameter */ 11298 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO); 11299 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param)); 11300 hb->heartbeat.hb_info.time_value_1 = now.tv_sec; 11301 hb->heartbeat.hb_info.time_value_2 = now.tv_usec; 11302 /* Did our user request this one, put it in */ 11303 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family; 11304 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len; 11305 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 11306 /* 11307 * we only take from the entropy pool if the address is not 11308 * confirmed. 11309 */ 11310 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 11311 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 11312 } else { 11313 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0; 11314 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0; 11315 } 11316 switch (net->ro._l_addr.sa.sa_family) { 11317#ifdef INET 11318 case AF_INET: 11319 memcpy(hb->heartbeat.hb_info.address, 11320 &net->ro._l_addr.sin.sin_addr, 11321 sizeof(net->ro._l_addr.sin.sin_addr)); 11322 break; 11323#endif 11324#ifdef INET6 11325 case AF_INET6: 11326 memcpy(hb->heartbeat.hb_info.address, 11327 &net->ro._l_addr.sin6.sin6_addr, 11328 sizeof(net->ro._l_addr.sin6.sin6_addr)); 11329 break; 11330#endif 11331 default: 11332 return; 11333 break; 11334 } 11335 net->hb_responded = 0; 11336 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11337 stcb->asoc.ctrl_queue_cnt++; 11338 SCTP_STAT_INCR(sctps_sendheartbeat); 11339 return; 11340} 11341 11342void 11343sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net, 11344 uint32_t high_tsn) 11345{ 11346 struct sctp_association *asoc; 11347 struct sctp_ecne_chunk *ecne; 11348 struct sctp_tmit_chunk *chk; 11349 11350 if (net == NULL) { 11351 return; 11352 } 11353 asoc = &stcb->asoc; 11354 SCTP_TCB_LOCK_ASSERT(stcb); 11355 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 11356 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) { 11357 /* found a previous ECN_ECHO update it if needed */ 11358 uint32_t cnt, ctsn; 11359 11360 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 11361 ctsn = ntohl(ecne->tsn); 11362 if (SCTP_TSN_GT(high_tsn, ctsn)) { 11363 ecne->tsn = htonl(high_tsn); 11364 SCTP_STAT_INCR(sctps_queue_upd_ecne); 11365 } 11366 cnt = ntohl(ecne->num_pkts_since_cwr); 11367 cnt++; 11368 ecne->num_pkts_since_cwr = htonl(cnt); 11369 return; 11370 } 11371 } 11372 /* nope could not find one to update so we must build one */ 11373 sctp_alloc_a_chunk(stcb, chk); 11374 if (chk == NULL) { 11375 return; 11376 } 11377 SCTP_STAT_INCR(sctps_queue_upd_ecne); 11378 chk->copy_by_ref = 0; 11379 chk->rec.chunk_id.id = SCTP_ECN_ECHO; 11380 chk->rec.chunk_id.can_take_data = 0; 11381 chk->flags = 0; 11382 chk->asoc = &stcb->asoc; 11383 chk->send_size = sizeof(struct sctp_ecne_chunk); 11384 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11385 if (chk->data == NULL) { 11386 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11387 return; 11388 } 11389 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11390 SCTP_BUF_LEN(chk->data) = chk->send_size; 11391 chk->sent = SCTP_DATAGRAM_UNSENT; 11392 chk->snd_count = 0; 11393 chk->whoTo = net; 11394 atomic_add_int(&chk->whoTo->ref_count, 1); 11395 11396 stcb->asoc.ecn_echo_cnt_onq++; 11397 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 11398 ecne->ch.chunk_type = SCTP_ECN_ECHO; 11399 ecne->ch.chunk_flags = 0; 11400 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk)); 11401 ecne->tsn = htonl(high_tsn); 11402 ecne->num_pkts_since_cwr = htonl(1); 11403 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next); 11404 asoc->ctrl_queue_cnt++; 11405} 11406 11407void 11408sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net, 11409 struct mbuf *m, int len, int iphlen, int bad_crc) 11410{ 11411 struct sctp_association *asoc; 11412 struct sctp_pktdrop_chunk *drp; 11413 struct sctp_tmit_chunk *chk; 11414 uint8_t *datap; 11415 int was_trunc = 0; 11416 int fullsz = 0; 11417 long spc; 11418 int offset; 11419 struct sctp_chunkhdr *ch, chunk_buf; 11420 unsigned int chk_length; 11421 11422 if (!stcb) { 11423 return; 11424 } 11425 asoc = &stcb->asoc; 11426 SCTP_TCB_LOCK_ASSERT(stcb); 11427 if (asoc->pktdrop_supported == 0) { 11428 /*- 11429 * peer must declare support before I send one. 11430 */ 11431 return; 11432 } 11433 if (stcb->sctp_socket == NULL) { 11434 return; 11435 } 11436 sctp_alloc_a_chunk(stcb, chk); 11437 if (chk == NULL) { 11438 return; 11439 } 11440 chk->copy_by_ref = 0; 11441 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED; 11442 chk->rec.chunk_id.can_take_data = 1; 11443 chk->flags = 0; 11444 len -= iphlen; 11445 chk->send_size = len; 11446 /* Validate that we do not have an ABORT in here. */ 11447 offset = iphlen + sizeof(struct sctphdr); 11448 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, 11449 sizeof(*ch), (uint8_t *) & chunk_buf); 11450 while (ch != NULL) { 11451 chk_length = ntohs(ch->chunk_length); 11452 if (chk_length < sizeof(*ch)) { 11453 /* break to abort land */ 11454 break; 11455 } 11456 switch (ch->chunk_type) { 11457 case SCTP_PACKET_DROPPED: 11458 case SCTP_ABORT_ASSOCIATION: 11459 case SCTP_INITIATION_ACK: 11460 /** 11461 * We don't respond with an PKT-DROP to an ABORT 11462 * or PKT-DROP. We also do not respond to an 11463 * INIT-ACK, because we can't know if the initiation 11464 * tag is correct or not. 11465 */ 11466 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11467 return; 11468 default: 11469 break; 11470 } 11471 offset += SCTP_SIZE32(chk_length); 11472 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, 11473 sizeof(*ch), (uint8_t *) & chunk_buf); 11474 } 11475 11476 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) > 11477 min(stcb->asoc.smallest_mtu, MCLBYTES)) { 11478 /* 11479 * only send 1 mtu worth, trim off the excess on the end. 11480 */ 11481 fullsz = len; 11482 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD; 11483 was_trunc = 1; 11484 } 11485 chk->asoc = &stcb->asoc; 11486 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 11487 if (chk->data == NULL) { 11488jump_out: 11489 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11490 return; 11491 } 11492 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11493 drp = mtod(chk->data, struct sctp_pktdrop_chunk *); 11494 if (drp == NULL) { 11495 sctp_m_freem(chk->data); 11496 chk->data = NULL; 11497 goto jump_out; 11498 } 11499 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) + 11500 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD)); 11501 chk->book_size_scale = 0; 11502 if (was_trunc) { 11503 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED; 11504 drp->trunc_len = htons(fullsz); 11505 /* 11506 * Len is already adjusted to size minus overhead above take 11507 * out the pkt_drop chunk itself from it. 11508 */ 11509 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk); 11510 len = chk->send_size; 11511 } else { 11512 /* no truncation needed */ 11513 drp->ch.chunk_flags = 0; 11514 drp->trunc_len = htons(0); 11515 } 11516 if (bad_crc) { 11517 drp->ch.chunk_flags |= SCTP_BADCRC; 11518 } 11519 chk->send_size += sizeof(struct sctp_pktdrop_chunk); 11520 SCTP_BUF_LEN(chk->data) = chk->send_size; 11521 chk->sent = SCTP_DATAGRAM_UNSENT; 11522 chk->snd_count = 0; 11523 if (net) { 11524 /* we should hit here */ 11525 chk->whoTo = net; 11526 atomic_add_int(&chk->whoTo->ref_count, 1); 11527 } else { 11528 chk->whoTo = NULL; 11529 } 11530 drp->ch.chunk_type = SCTP_PACKET_DROPPED; 11531 drp->ch.chunk_length = htons(chk->send_size); 11532 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket); 11533 if (spc < 0) { 11534 spc = 0; 11535 } 11536 drp->bottle_bw = htonl(spc); 11537 if (asoc->my_rwnd) { 11538 drp->current_onq = htonl(asoc->size_on_reasm_queue + 11539 asoc->size_on_all_streams + 11540 asoc->my_rwnd_control_len + 11541 stcb->sctp_socket->so_rcv.sb_cc); 11542 } else { 11543 /*- 11544 * If my rwnd is 0, possibly from mbuf depletion as well as 11545 * space used, tell the peer there is NO space aka onq == bw 11546 */ 11547 drp->current_onq = htonl(spc); 11548 } 11549 drp->reserved = 0; 11550 datap = drp->data; 11551 m_copydata(m, iphlen, len, (caddr_t)datap); 11552 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11553 asoc->ctrl_queue_cnt++; 11554} 11555 11556void 11557sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override) 11558{ 11559 struct sctp_association *asoc; 11560 struct sctp_cwr_chunk *cwr; 11561 struct sctp_tmit_chunk *chk; 11562 11563 SCTP_TCB_LOCK_ASSERT(stcb); 11564 if (net == NULL) { 11565 return; 11566 } 11567 asoc = &stcb->asoc; 11568 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 11569 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) { 11570 /* 11571 * found a previous CWR queued to same destination 11572 * update it if needed 11573 */ 11574 uint32_t ctsn; 11575 11576 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 11577 ctsn = ntohl(cwr->tsn); 11578 if (SCTP_TSN_GT(high_tsn, ctsn)) { 11579 cwr->tsn = htonl(high_tsn); 11580 } 11581 if (override & SCTP_CWR_REDUCE_OVERRIDE) { 11582 /* Make sure override is carried */ 11583 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE; 11584 } 11585 return; 11586 } 11587 } 11588 sctp_alloc_a_chunk(stcb, chk); 11589 if (chk == NULL) { 11590 return; 11591 } 11592 chk->copy_by_ref = 0; 11593 chk->rec.chunk_id.id = SCTP_ECN_CWR; 11594 chk->rec.chunk_id.can_take_data = 1; 11595 chk->flags = 0; 11596 chk->asoc = &stcb->asoc; 11597 chk->send_size = sizeof(struct sctp_cwr_chunk); 11598 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11599 if (chk->data == NULL) { 11600 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11601 return; 11602 } 11603 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11604 SCTP_BUF_LEN(chk->data) = chk->send_size; 11605 chk->sent = SCTP_DATAGRAM_UNSENT; 11606 chk->snd_count = 0; 11607 chk->whoTo = net; 11608 atomic_add_int(&chk->whoTo->ref_count, 1); 11609 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 11610 cwr->ch.chunk_type = SCTP_ECN_CWR; 11611 cwr->ch.chunk_flags = override; 11612 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk)); 11613 cwr->tsn = htonl(high_tsn); 11614 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11615 asoc->ctrl_queue_cnt++; 11616} 11617 11618void 11619sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk, 11620 int number_entries, uint16_t * list, 11621 uint32_t seq, uint32_t resp_seq, uint32_t last_sent) 11622{ 11623 uint16_t len, old_len, i; 11624 struct sctp_stream_reset_out_request *req_out; 11625 struct sctp_chunkhdr *ch; 11626 11627 ch = mtod(chk->data, struct sctp_chunkhdr *); 11628 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11629 11630 /* get to new offset for the param. */ 11631 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len); 11632 /* now how long will this param be? */ 11633 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries)); 11634 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST); 11635 req_out->ph.param_length = htons(len); 11636 req_out->request_seq = htonl(seq); 11637 req_out->response_seq = htonl(resp_seq); 11638 req_out->send_reset_at_tsn = htonl(last_sent); 11639 if (number_entries) { 11640 for (i = 0; i < number_entries; i++) { 11641 req_out->list_of_streams[i] = htons(list[i]); 11642 } 11643 } 11644 if (SCTP_SIZE32(len) > len) { 11645 /*- 11646 * Need to worry about the pad we may end up adding to the 11647 * end. This is easy since the struct is either aligned to 4 11648 * bytes or 2 bytes off. 11649 */ 11650 req_out->list_of_streams[number_entries] = 0; 11651 } 11652 /* now fix the chunk length */ 11653 ch->chunk_length = htons(len + old_len); 11654 chk->book_size = len + old_len; 11655 chk->book_size_scale = 0; 11656 chk->send_size = SCTP_SIZE32(chk->book_size); 11657 SCTP_BUF_LEN(chk->data) = chk->send_size; 11658 return; 11659} 11660 11661static void 11662sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk, 11663 int number_entries, uint16_t * list, 11664 uint32_t seq) 11665{ 11666 uint16_t len, old_len, i; 11667 struct sctp_stream_reset_in_request *req_in; 11668 struct sctp_chunkhdr *ch; 11669 11670 ch = mtod(chk->data, struct sctp_chunkhdr *); 11671 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11672 11673 /* get to new offset for the param. */ 11674 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len); 11675 /* now how long will this param be? */ 11676 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries)); 11677 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST); 11678 req_in->ph.param_length = htons(len); 11679 req_in->request_seq = htonl(seq); 11680 if (number_entries) { 11681 for (i = 0; i < number_entries; i++) { 11682 req_in->list_of_streams[i] = htons(list[i]); 11683 } 11684 } 11685 if (SCTP_SIZE32(len) > len) { 11686 /*- 11687 * Need to worry about the pad we may end up adding to the 11688 * end. This is easy since the struct is either aligned to 4 11689 * bytes or 2 bytes off. 11690 */ 11691 req_in->list_of_streams[number_entries] = 0; 11692 } 11693 /* now fix the chunk length */ 11694 ch->chunk_length = htons(len + old_len); 11695 chk->book_size = len + old_len; 11696 chk->book_size_scale = 0; 11697 chk->send_size = SCTP_SIZE32(chk->book_size); 11698 SCTP_BUF_LEN(chk->data) = chk->send_size; 11699 return; 11700} 11701 11702static void 11703sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk, 11704 uint32_t seq) 11705{ 11706 uint16_t len, old_len; 11707 struct sctp_stream_reset_tsn_request *req_tsn; 11708 struct sctp_chunkhdr *ch; 11709 11710 ch = mtod(chk->data, struct sctp_chunkhdr *); 11711 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11712 11713 /* get to new offset for the param. */ 11714 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len); 11715 /* now how long will this param be? */ 11716 len = sizeof(struct sctp_stream_reset_tsn_request); 11717 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST); 11718 req_tsn->ph.param_length = htons(len); 11719 req_tsn->request_seq = htonl(seq); 11720 11721 /* now fix the chunk length */ 11722 ch->chunk_length = htons(len + old_len); 11723 chk->send_size = len + old_len; 11724 chk->book_size = SCTP_SIZE32(chk->send_size); 11725 chk->book_size_scale = 0; 11726 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11727 return; 11728} 11729 11730void 11731sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk, 11732 uint32_t resp_seq, uint32_t result) 11733{ 11734 uint16_t len, old_len; 11735 struct sctp_stream_reset_response *resp; 11736 struct sctp_chunkhdr *ch; 11737 11738 ch = mtod(chk->data, struct sctp_chunkhdr *); 11739 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11740 11741 /* get to new offset for the param. */ 11742 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len); 11743 /* now how long will this param be? */ 11744 len = sizeof(struct sctp_stream_reset_response); 11745 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 11746 resp->ph.param_length = htons(len); 11747 resp->response_seq = htonl(resp_seq); 11748 resp->result = ntohl(result); 11749 11750 /* now fix the chunk length */ 11751 ch->chunk_length = htons(len + old_len); 11752 chk->book_size = len + old_len; 11753 chk->book_size_scale = 0; 11754 chk->send_size = SCTP_SIZE32(chk->book_size); 11755 SCTP_BUF_LEN(chk->data) = chk->send_size; 11756 return; 11757} 11758 11759void 11760sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk, 11761 uint32_t resp_seq, uint32_t result, 11762 uint32_t send_una, uint32_t recv_next) 11763{ 11764 uint16_t len, old_len; 11765 struct sctp_stream_reset_response_tsn *resp; 11766 struct sctp_chunkhdr *ch; 11767 11768 ch = mtod(chk->data, struct sctp_chunkhdr *); 11769 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11770 11771 /* get to new offset for the param. */ 11772 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len); 11773 /* now how long will this param be? */ 11774 len = sizeof(struct sctp_stream_reset_response_tsn); 11775 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 11776 resp->ph.param_length = htons(len); 11777 resp->response_seq = htonl(resp_seq); 11778 resp->result = htonl(result); 11779 resp->senders_next_tsn = htonl(send_una); 11780 resp->receivers_next_tsn = htonl(recv_next); 11781 11782 /* now fix the chunk length */ 11783 ch->chunk_length = htons(len + old_len); 11784 chk->book_size = len + old_len; 11785 chk->send_size = SCTP_SIZE32(chk->book_size); 11786 chk->book_size_scale = 0; 11787 SCTP_BUF_LEN(chk->data) = chk->send_size; 11788 return; 11789} 11790 11791static void 11792sctp_add_an_out_stream(struct sctp_tmit_chunk *chk, 11793 uint32_t seq, 11794 uint16_t adding) 11795{ 11796 uint16_t len, old_len; 11797 struct sctp_chunkhdr *ch; 11798 struct sctp_stream_reset_add_strm *addstr; 11799 11800 ch = mtod(chk->data, struct sctp_chunkhdr *); 11801 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11802 11803 /* get to new offset for the param. */ 11804 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len); 11805 /* now how long will this param be? */ 11806 len = sizeof(struct sctp_stream_reset_add_strm); 11807 11808 /* Fill it out. */ 11809 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS); 11810 addstr->ph.param_length = htons(len); 11811 addstr->request_seq = htonl(seq); 11812 addstr->number_of_streams = htons(adding); 11813 addstr->reserved = 0; 11814 11815 /* now fix the chunk length */ 11816 ch->chunk_length = htons(len + old_len); 11817 chk->send_size = len + old_len; 11818 chk->book_size = SCTP_SIZE32(chk->send_size); 11819 chk->book_size_scale = 0; 11820 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11821 return; 11822} 11823 11824static void 11825sctp_add_an_in_stream(struct sctp_tmit_chunk *chk, 11826 uint32_t seq, 11827 uint16_t adding) 11828{ 11829 uint16_t len, old_len; 11830 struct sctp_chunkhdr *ch; 11831 struct sctp_stream_reset_add_strm *addstr; 11832 11833 ch = mtod(chk->data, struct sctp_chunkhdr *); 11834 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11835 11836 /* get to new offset for the param. */ 11837 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len); 11838 /* now how long will this param be? */ 11839 len = sizeof(struct sctp_stream_reset_add_strm); 11840 /* Fill it out. */ 11841 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS); 11842 addstr->ph.param_length = htons(len); 11843 addstr->request_seq = htonl(seq); 11844 addstr->number_of_streams = htons(adding); 11845 addstr->reserved = 0; 11846 11847 /* now fix the chunk length */ 11848 ch->chunk_length = htons(len + old_len); 11849 chk->send_size = len + old_len; 11850 chk->book_size = SCTP_SIZE32(chk->send_size); 11851 chk->book_size_scale = 0; 11852 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11853 return; 11854} 11855 11856int 11857sctp_send_str_reset_req(struct sctp_tcb *stcb, 11858 uint16_t number_entries, uint16_t * list, 11859 uint8_t send_out_req, 11860 uint8_t send_in_req, 11861 uint8_t send_tsn_req, 11862 uint8_t add_stream, 11863 uint16_t adding_o, 11864 uint16_t adding_i, uint8_t peer_asked) 11865{ 11866 11867 struct sctp_association *asoc; 11868 struct sctp_tmit_chunk *chk; 11869 struct sctp_chunkhdr *ch; 11870 uint32_t seq; 11871 11872 asoc = &stcb->asoc; 11873 if (asoc->stream_reset_outstanding) { 11874 /*- 11875 * Already one pending, must get ACK back to clear the flag. 11876 */ 11877 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY); 11878 return (EBUSY); 11879 } 11880 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) && 11881 (add_stream == 0)) { 11882 /* nothing to do */ 11883 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 11884 return (EINVAL); 11885 } 11886 if (send_tsn_req && (send_out_req || send_in_req)) { 11887 /* error, can't do that */ 11888 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 11889 return (EINVAL); 11890 } 11891 if (number_entries > (MCLBYTES - 11892 SCTP_MIN_OVERHEAD - 11893 sizeof(struct sctp_chunkhdr) - 11894 sizeof(struct sctp_stream_reset_out_request)) / 11895 sizeof(uint16_t)) { 11896 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11897 return (ENOMEM); 11898 } 11899 sctp_alloc_a_chunk(stcb, chk); 11900 if (chk == NULL) { 11901 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11902 return (ENOMEM); 11903 } 11904 chk->copy_by_ref = 0; 11905 chk->rec.chunk_id.id = SCTP_STREAM_RESET; 11906 chk->rec.chunk_id.can_take_data = 0; 11907 chk->flags = 0; 11908 chk->asoc = &stcb->asoc; 11909 chk->book_size = sizeof(struct sctp_chunkhdr); 11910 chk->send_size = SCTP_SIZE32(chk->book_size); 11911 chk->book_size_scale = 0; 11912 11913 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 11914 if (chk->data == NULL) { 11915 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED); 11916 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11917 return (ENOMEM); 11918 } 11919 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11920 11921 /* setup chunk parameters */ 11922 chk->sent = SCTP_DATAGRAM_UNSENT; 11923 chk->snd_count = 0; 11924 if (stcb->asoc.alternate) { 11925 chk->whoTo = stcb->asoc.alternate; 11926 } else { 11927 chk->whoTo = stcb->asoc.primary_destination; 11928 } 11929 atomic_add_int(&chk->whoTo->ref_count, 1); 11930 ch = mtod(chk->data, struct sctp_chunkhdr *); 11931 ch->chunk_type = SCTP_STREAM_RESET; 11932 ch->chunk_flags = 0; 11933 ch->chunk_length = htons(chk->book_size); 11934 SCTP_BUF_LEN(chk->data) = chk->send_size; 11935 11936 seq = stcb->asoc.str_reset_seq_out; 11937 if (send_out_req) { 11938 sctp_add_stream_reset_out(chk, number_entries, list, 11939 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1)); 11940 asoc->stream_reset_out_is_outstanding = 1; 11941 seq++; 11942 asoc->stream_reset_outstanding++; 11943 } 11944 if ((add_stream & 1) && 11945 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) { 11946 /* Need to allocate more */ 11947 struct sctp_stream_out *oldstream; 11948 struct sctp_stream_queue_pending *sp, *nsp; 11949 int i; 11950 11951#if defined(SCTP_DETAILED_STR_STATS) 11952 int j; 11953 11954#endif 11955 11956 oldstream = stcb->asoc.strmout; 11957 /* get some more */ 11958 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *, 11959 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)), 11960 SCTP_M_STRMO); 11961 if (stcb->asoc.strmout == NULL) { 11962 uint8_t x; 11963 11964 stcb->asoc.strmout = oldstream; 11965 /* Turn off the bit */ 11966 x = add_stream & 0xfe; 11967 add_stream = x; 11968 goto skip_stuff; 11969 } 11970 /* 11971 * Ok now we proceed with copying the old out stuff and 11972 * initializing the new stuff. 11973 */ 11974 SCTP_TCB_SEND_LOCK(stcb); 11975 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1); 11976 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 11977 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 11978 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues; 11979 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send; 11980 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete; 11981 stcb->asoc.strmout[i].stream_no = i; 11982 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]); 11983 /* now anything on those queues? */ 11984 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) { 11985 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next); 11986 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next); 11987 } 11988 /* Now move assoc pointers too */ 11989 if (stcb->asoc.last_out_stream == &oldstream[i]) { 11990 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i]; 11991 } 11992 if (stcb->asoc.locked_on_sending == &oldstream[i]) { 11993 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i]; 11994 } 11995 } 11996 /* now the new streams */ 11997 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1); 11998 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) { 11999 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 12000 stcb->asoc.strmout[i].chunks_on_queues = 0; 12001#if defined(SCTP_DETAILED_STR_STATS) 12002 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) { 12003 stcb->asoc.strmout[i].abandoned_sent[j] = 0; 12004 stcb->asoc.strmout[i].abandoned_unsent[j] = 0; 12005 } 12006#else 12007 stcb->asoc.strmout[i].abandoned_sent[0] = 0; 12008 stcb->asoc.strmout[i].abandoned_unsent[0] = 0; 12009#endif 12010 stcb->asoc.strmout[i].next_sequence_send = 0x0; 12011 stcb->asoc.strmout[i].stream_no = i; 12012 stcb->asoc.strmout[i].last_msg_incomplete = 0; 12013 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL); 12014 } 12015 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o; 12016 SCTP_FREE(oldstream, SCTP_M_STRMO); 12017 SCTP_TCB_SEND_UNLOCK(stcb); 12018 } 12019skip_stuff: 12020 if ((add_stream & 1) && (adding_o > 0)) { 12021 asoc->strm_pending_add_size = adding_o; 12022 asoc->peer_req_out = peer_asked; 12023 sctp_add_an_out_stream(chk, seq, adding_o); 12024 seq++; 12025 asoc->stream_reset_outstanding++; 12026 } 12027 if ((add_stream & 2) && (adding_i > 0)) { 12028 sctp_add_an_in_stream(chk, seq, adding_i); 12029 seq++; 12030 asoc->stream_reset_outstanding++; 12031 } 12032 if (send_in_req) { 12033 sctp_add_stream_reset_in(chk, number_entries, list, seq); 12034 seq++; 12035 asoc->stream_reset_outstanding++; 12036 } 12037 if (send_tsn_req) { 12038 sctp_add_stream_reset_tsn(chk, seq); 12039 asoc->stream_reset_outstanding++; 12040 } 12041 asoc->str_reset = chk; 12042 /* insert the chunk for sending */ 12043 TAILQ_INSERT_TAIL(&asoc->control_send_queue, 12044 chk, 12045 sctp_next); 12046 asoc->ctrl_queue_cnt++; 12047 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 12048 return (0); 12049} 12050 12051void 12052sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst, 12053 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, 12054 uint8_t use_mflowid, uint32_t mflowid, 12055 uint32_t vrf_id, uint16_t port) 12056{ 12057 /* Don't respond to an ABORT with an ABORT. */ 12058 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) { 12059 if (cause) 12060 sctp_m_freem(cause); 12061 return; 12062 } 12063 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause, 12064 use_mflowid, mflowid, 12065 vrf_id, port); 12066 return; 12067} 12068 12069void 12070sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst, 12071 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, 12072 uint8_t use_mflowid, uint32_t mflowid, 12073 uint32_t vrf_id, uint16_t port) 12074{ 12075 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause, 12076 use_mflowid, mflowid, 12077 vrf_id, port); 12078 return; 12079} 12080 12081static struct mbuf * 12082sctp_copy_resume(struct uio *uio, 12083 int max_send_len, 12084 int user_marks_eor, 12085 int *error, 12086 uint32_t * sndout, 12087 struct mbuf **new_tail) 12088{ 12089 struct mbuf *m; 12090 12091 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0, 12092 (M_PKTHDR | (user_marks_eor ? M_EOR : 0))); 12093 if (m == NULL) { 12094 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); 12095 *error = ENOBUFS; 12096 } else { 12097 *sndout = m_length(m, NULL); 12098 *new_tail = m_last(m); 12099 } 12100 return (m); 12101} 12102 12103static int 12104sctp_copy_one(struct sctp_stream_queue_pending *sp, 12105 struct uio *uio, 12106 int resv_upfront) 12107{ 12108 int left; 12109 12110 left = sp->length; 12111 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length, 12112 resv_upfront, 0); 12113 if (sp->data == NULL) { 12114 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); 12115 return (ENOBUFS); 12116 } 12117 sp->tail_mbuf = m_last(sp->data); 12118 return (0); 12119} 12120 12121 12122 12123static struct sctp_stream_queue_pending * 12124sctp_copy_it_in(struct sctp_tcb *stcb, 12125 struct sctp_association *asoc, 12126 struct sctp_sndrcvinfo *srcv, 12127 struct uio *uio, 12128 struct sctp_nets *net, 12129 int max_send_len, 12130 int user_marks_eor, 12131 int *error) 12132{ 12133 /*- 12134 * This routine must be very careful in its work. Protocol 12135 * processing is up and running so care must be taken to spl...() 12136 * when you need to do something that may effect the stcb/asoc. The 12137 * sb is locked however. When data is copied the protocol processing 12138 * should be enabled since this is a slower operation... 12139 */ 12140 struct sctp_stream_queue_pending *sp = NULL; 12141 int resv_in_first; 12142 12143 *error = 0; 12144 /* Now can we send this? */ 12145 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 12146 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 12147 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 12148 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 12149 /* got data while shutting down */ 12150 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12151 *error = ECONNRESET; 12152 goto out_now; 12153 } 12154 sctp_alloc_a_strmoq(stcb, sp); 12155 if (sp == NULL) { 12156 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12157 *error = ENOMEM; 12158 goto out_now; 12159 } 12160 sp->act_flags = 0; 12161 sp->sender_all_done = 0; 12162 sp->sinfo_flags = srcv->sinfo_flags; 12163 sp->timetolive = srcv->sinfo_timetolive; 12164 sp->ppid = srcv->sinfo_ppid; 12165 sp->context = srcv->sinfo_context; 12166 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 12167 12168 sp->stream = srcv->sinfo_stream; 12169 sp->length = min(uio->uio_resid, max_send_len); 12170 if ((sp->length == (uint32_t) uio->uio_resid) && 12171 ((user_marks_eor == 0) || 12172 (srcv->sinfo_flags & SCTP_EOF) || 12173 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { 12174 sp->msg_is_complete = 1; 12175 } else { 12176 sp->msg_is_complete = 0; 12177 } 12178 sp->sender_all_done = 0; 12179 sp->some_taken = 0; 12180 sp->put_last_out = 0; 12181 resv_in_first = sizeof(struct sctp_data_chunk); 12182 sp->data = sp->tail_mbuf = NULL; 12183 if (sp->length == 0) { 12184 *error = 0; 12185 goto skip_copy; 12186 } 12187 if (srcv->sinfo_keynumber_valid) { 12188 sp->auth_keyid = srcv->sinfo_keynumber; 12189 } else { 12190 sp->auth_keyid = stcb->asoc.authinfo.active_keyid; 12191 } 12192 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { 12193 sctp_auth_key_acquire(stcb, sp->auth_keyid); 12194 sp->holds_key_ref = 1; 12195 } 12196 *error = sctp_copy_one(sp, uio, resv_in_first); 12197skip_copy: 12198 if (*error) { 12199 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 12200 sp = NULL; 12201 } else { 12202 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 12203 sp->net = net; 12204 atomic_add_int(&sp->net->ref_count, 1); 12205 } else { 12206 sp->net = NULL; 12207 } 12208 sctp_set_prsctp_policy(sp); 12209 } 12210out_now: 12211 return (sp); 12212} 12213 12214 12215int 12216sctp_sosend(struct socket *so, 12217 struct sockaddr *addr, 12218 struct uio *uio, 12219 struct mbuf *top, 12220 struct mbuf *control, 12221 int flags, 12222 struct thread *p 12223) 12224{ 12225 int error, use_sndinfo = 0; 12226 struct sctp_sndrcvinfo sndrcvninfo; 12227 struct sockaddr *addr_to_use; 12228 12229#if defined(INET) && defined(INET6) 12230 struct sockaddr_in sin; 12231 12232#endif 12233 12234 if (control) { 12235 /* process cmsg snd/rcv info (maybe a assoc-id) */ 12236 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control, 12237 sizeof(sndrcvninfo))) { 12238 /* got one */ 12239 use_sndinfo = 1; 12240 } 12241 } 12242 addr_to_use = addr; 12243#if defined(INET) && defined(INET6) 12244 if ((addr) && (addr->sa_family == AF_INET6)) { 12245 struct sockaddr_in6 *sin6; 12246 12247 sin6 = (struct sockaddr_in6 *)addr; 12248 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 12249 in6_sin6_2_sin(&sin, sin6); 12250 addr_to_use = (struct sockaddr *)&sin; 12251 } 12252 } 12253#endif 12254 error = sctp_lower_sosend(so, addr_to_use, uio, top, 12255 control, 12256 flags, 12257 use_sndinfo ? &sndrcvninfo : NULL 12258 ,p 12259 ); 12260 return (error); 12261} 12262 12263 12264int 12265sctp_lower_sosend(struct socket *so, 12266 struct sockaddr *addr, 12267 struct uio *uio, 12268 struct mbuf *i_pak, 12269 struct mbuf *control, 12270 int flags, 12271 struct sctp_sndrcvinfo *srcv 12272 , 12273 struct thread *p 12274) 12275{ 12276 unsigned int sndlen = 0, max_len; 12277 int error, len; 12278 struct mbuf *top = NULL; 12279 int queue_only = 0, queue_only_for_init = 0; 12280 int free_cnt_applied = 0; 12281 int un_sent; 12282 int now_filled = 0; 12283 unsigned int inqueue_bytes = 0; 12284 struct sctp_block_entry be; 12285 struct sctp_inpcb *inp; 12286 struct sctp_tcb *stcb = NULL; 12287 struct timeval now; 12288 struct sctp_nets *net; 12289 struct sctp_association *asoc; 12290 struct sctp_inpcb *t_inp; 12291 int user_marks_eor; 12292 int create_lock_applied = 0; 12293 int nagle_applies = 0; 12294 int some_on_control = 0; 12295 int got_all_of_the_send = 0; 12296 int hold_tcblock = 0; 12297 int non_blocking = 0; 12298 uint32_t local_add_more, local_soresv = 0; 12299 uint16_t port; 12300 uint16_t sinfo_flags; 12301 sctp_assoc_t sinfo_assoc_id; 12302 12303 error = 0; 12304 net = NULL; 12305 stcb = NULL; 12306 asoc = NULL; 12307 12308 t_inp = inp = (struct sctp_inpcb *)so->so_pcb; 12309 if (inp == NULL) { 12310 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12311 error = EINVAL; 12312 if (i_pak) { 12313 SCTP_RELEASE_PKT(i_pak); 12314 } 12315 return (error); 12316 } 12317 if ((uio == NULL) && (i_pak == NULL)) { 12318 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12319 return (EINVAL); 12320 } 12321 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR); 12322 atomic_add_int(&inp->total_sends, 1); 12323 if (uio) { 12324 if (uio->uio_resid < 0) { 12325 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12326 return (EINVAL); 12327 } 12328 sndlen = uio->uio_resid; 12329 } else { 12330 top = SCTP_HEADER_TO_CHAIN(i_pak); 12331 sndlen = SCTP_HEADER_LEN(i_pak); 12332 } 12333 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n", 12334 (void *)addr, 12335 sndlen); 12336 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 12337 (inp->sctp_socket->so_qlimit)) { 12338 /* The listener can NOT send */ 12339 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); 12340 error = ENOTCONN; 12341 goto out_unlocked; 12342 } 12343 /** 12344 * Pre-screen address, if one is given the sin-len 12345 * must be set correctly! 12346 */ 12347 if (addr) { 12348 union sctp_sockstore *raddr = (union sctp_sockstore *)addr; 12349 12350 switch (raddr->sa.sa_family) { 12351#ifdef INET 12352 case AF_INET: 12353 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) { 12354 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12355 error = EINVAL; 12356 goto out_unlocked; 12357 } 12358 port = raddr->sin.sin_port; 12359 break; 12360#endif 12361#ifdef INET6 12362 case AF_INET6: 12363 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) { 12364 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12365 error = EINVAL; 12366 goto out_unlocked; 12367 } 12368 port = raddr->sin6.sin6_port; 12369 break; 12370#endif 12371 default: 12372 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT); 12373 error = EAFNOSUPPORT; 12374 goto out_unlocked; 12375 } 12376 } else 12377 port = 0; 12378 12379 if (srcv) { 12380 sinfo_flags = srcv->sinfo_flags; 12381 sinfo_assoc_id = srcv->sinfo_assoc_id; 12382 if (INVALID_SINFO_FLAG(sinfo_flags) || 12383 PR_SCTP_INVALID_POLICY(sinfo_flags)) { 12384 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12385 error = EINVAL; 12386 goto out_unlocked; 12387 } 12388 if (srcv->sinfo_flags) 12389 SCTP_STAT_INCR(sctps_sends_with_flags); 12390 } else { 12391 sinfo_flags = inp->def_send.sinfo_flags; 12392 sinfo_assoc_id = inp->def_send.sinfo_assoc_id; 12393 } 12394 if (sinfo_flags & SCTP_SENDALL) { 12395 /* its a sendall */ 12396 error = sctp_sendall(inp, uio, top, srcv); 12397 top = NULL; 12398 goto out_unlocked; 12399 } 12400 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) { 12401 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12402 error = EINVAL; 12403 goto out_unlocked; 12404 } 12405 /* now we must find the assoc */ 12406 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) || 12407 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 12408 SCTP_INP_RLOCK(inp); 12409 stcb = LIST_FIRST(&inp->sctp_asoc_list); 12410 if (stcb) { 12411 SCTP_TCB_LOCK(stcb); 12412 hold_tcblock = 1; 12413 } 12414 SCTP_INP_RUNLOCK(inp); 12415 } else if (sinfo_assoc_id) { 12416 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0); 12417 } else if (addr) { 12418 /*- 12419 * Since we did not use findep we must 12420 * increment it, and if we don't find a tcb 12421 * decrement it. 12422 */ 12423 SCTP_INP_WLOCK(inp); 12424 SCTP_INP_INCR_REF(inp); 12425 SCTP_INP_WUNLOCK(inp); 12426 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 12427 if (stcb == NULL) { 12428 SCTP_INP_WLOCK(inp); 12429 SCTP_INP_DECR_REF(inp); 12430 SCTP_INP_WUNLOCK(inp); 12431 } else { 12432 hold_tcblock = 1; 12433 } 12434 } 12435 if ((stcb == NULL) && (addr)) { 12436 /* Possible implicit send? */ 12437 SCTP_ASOC_CREATE_LOCK(inp); 12438 create_lock_applied = 1; 12439 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || 12440 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 12441 /* Should I really unlock ? */ 12442 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12443 error = EINVAL; 12444 goto out_unlocked; 12445 12446 } 12447 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) && 12448 (addr->sa_family == AF_INET6)) { 12449 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12450 error = EINVAL; 12451 goto out_unlocked; 12452 } 12453 SCTP_INP_WLOCK(inp); 12454 SCTP_INP_INCR_REF(inp); 12455 SCTP_INP_WUNLOCK(inp); 12456 /* With the lock applied look again */ 12457 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 12458 if ((stcb == NULL) && (control != NULL) && (port > 0)) { 12459 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error); 12460 } 12461 if (stcb == NULL) { 12462 SCTP_INP_WLOCK(inp); 12463 SCTP_INP_DECR_REF(inp); 12464 SCTP_INP_WUNLOCK(inp); 12465 } else { 12466 hold_tcblock = 1; 12467 } 12468 if (error) { 12469 goto out_unlocked; 12470 } 12471 if (t_inp != inp) { 12472 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); 12473 error = ENOTCONN; 12474 goto out_unlocked; 12475 } 12476 } 12477 if (stcb == NULL) { 12478 if (addr == NULL) { 12479 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); 12480 error = ENOENT; 12481 goto out_unlocked; 12482 } else { 12483 /* We must go ahead and start the INIT process */ 12484 uint32_t vrf_id; 12485 12486 if ((sinfo_flags & SCTP_ABORT) || 12487 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) { 12488 /*- 12489 * User asks to abort a non-existant assoc, 12490 * or EOF a non-existant assoc with no data 12491 */ 12492 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); 12493 error = ENOENT; 12494 goto out_unlocked; 12495 } 12496 /* get an asoc/stcb struct */ 12497 vrf_id = inp->def_vrf_id; 12498#ifdef INVARIANTS 12499 if (create_lock_applied == 0) { 12500 panic("Error, should hold create lock and I don't?"); 12501 } 12502#endif 12503 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 12504 p 12505 ); 12506 if (stcb == NULL) { 12507 /* Error is setup for us in the call */ 12508 goto out_unlocked; 12509 } 12510 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 12511 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 12512 /* 12513 * Set the connected flag so we can queue 12514 * data 12515 */ 12516 soisconnecting(so); 12517 } 12518 hold_tcblock = 1; 12519 if (create_lock_applied) { 12520 SCTP_ASOC_CREATE_UNLOCK(inp); 12521 create_lock_applied = 0; 12522 } else { 12523 SCTP_PRINTF("Huh-3? create lock should have been on??\n"); 12524 } 12525 /* 12526 * Turn on queue only flag to prevent data from 12527 * being sent 12528 */ 12529 queue_only = 1; 12530 asoc = &stcb->asoc; 12531 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); 12532 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 12533 12534 /* initialize authentication params for the assoc */ 12535 sctp_initialize_auth_params(inp, stcb); 12536 12537 if (control) { 12538 if (sctp_process_cmsgs_for_init(stcb, control, &error)) { 12539 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7); 12540 hold_tcblock = 0; 12541 stcb = NULL; 12542 goto out_unlocked; 12543 } 12544 } 12545 /* out with the INIT */ 12546 queue_only_for_init = 1; 12547 /*- 12548 * we may want to dig in after this call and adjust the MTU 12549 * value. It defaulted to 1500 (constant) but the ro 12550 * structure may now have an update and thus we may need to 12551 * change it BEFORE we append the message. 12552 */ 12553 } 12554 } else 12555 asoc = &stcb->asoc; 12556 if (srcv == NULL) 12557 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send; 12558 if (srcv->sinfo_flags & SCTP_ADDR_OVER) { 12559 if (addr) 12560 net = sctp_findnet(stcb, addr); 12561 else 12562 net = NULL; 12563 if ((net == NULL) || 12564 ((port != 0) && (port != stcb->rport))) { 12565 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12566 error = EINVAL; 12567 goto out_unlocked; 12568 } 12569 } else { 12570 if (stcb->asoc.alternate) { 12571 net = stcb->asoc.alternate; 12572 } else { 12573 net = stcb->asoc.primary_destination; 12574 } 12575 } 12576 atomic_add_int(&stcb->total_sends, 1); 12577 /* Keep the stcb from being freed under our feet */ 12578 atomic_add_int(&asoc->refcnt, 1); 12579 free_cnt_applied = 1; 12580 12581 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) { 12582 if (sndlen > asoc->smallest_mtu) { 12583 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12584 error = EMSGSIZE; 12585 goto out_unlocked; 12586 } 12587 } 12588 if (SCTP_SO_IS_NBIO(so) 12589 || (flags & MSG_NBIO) 12590 ) { 12591 non_blocking = 1; 12592 } 12593 /* would we block? */ 12594 if (non_blocking) { 12595 if (hold_tcblock == 0) { 12596 SCTP_TCB_LOCK(stcb); 12597 hold_tcblock = 1; 12598 } 12599 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12600 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) || 12601 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12602 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK); 12603 if (sndlen > SCTP_SB_LIMIT_SND(so)) 12604 error = EMSGSIZE; 12605 else 12606 error = EWOULDBLOCK; 12607 goto out_unlocked; 12608 } 12609 stcb->asoc.sb_send_resv += sndlen; 12610 SCTP_TCB_UNLOCK(stcb); 12611 hold_tcblock = 0; 12612 } else { 12613 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen); 12614 } 12615 local_soresv = sndlen; 12616 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12617 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12618 error = ECONNRESET; 12619 goto out_unlocked; 12620 } 12621 if (create_lock_applied) { 12622 SCTP_ASOC_CREATE_UNLOCK(inp); 12623 create_lock_applied = 0; 12624 } 12625 if (asoc->stream_reset_outstanding) { 12626 /* 12627 * Can't queue any data while stream reset is underway. 12628 */ 12629 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN); 12630 error = EAGAIN; 12631 goto out_unlocked; 12632 } 12633 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 12634 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 12635 queue_only = 1; 12636 } 12637 /* we are now done with all control */ 12638 if (control) { 12639 sctp_m_freem(control); 12640 control = NULL; 12641 } 12642 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 12643 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 12644 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 12645 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 12646 if (srcv->sinfo_flags & SCTP_ABORT) { 12647 ; 12648 } else { 12649 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12650 error = ECONNRESET; 12651 goto out_unlocked; 12652 } 12653 } 12654 /* Ok, we will attempt a msgsnd :> */ 12655 if (p) { 12656 p->td_ru.ru_msgsnd++; 12657 } 12658 /* Are we aborting? */ 12659 if (srcv->sinfo_flags & SCTP_ABORT) { 12660 struct mbuf *mm; 12661 int tot_demand, tot_out = 0, max_out; 12662 12663 SCTP_STAT_INCR(sctps_sends_with_abort); 12664 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 12665 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 12666 /* It has to be up before we abort */ 12667 /* how big is the user initiated abort? */ 12668 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12669 error = EINVAL; 12670 goto out; 12671 } 12672 if (hold_tcblock) { 12673 SCTP_TCB_UNLOCK(stcb); 12674 hold_tcblock = 0; 12675 } 12676 if (top) { 12677 struct mbuf *cntm = NULL; 12678 12679 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA); 12680 if (sndlen != 0) { 12681 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) { 12682 tot_out += SCTP_BUF_LEN(cntm); 12683 } 12684 } 12685 } else { 12686 /* Must fit in a MTU */ 12687 tot_out = sndlen; 12688 tot_demand = (tot_out + sizeof(struct sctp_paramhdr)); 12689 if (tot_demand > SCTP_DEFAULT_ADD_MORE) { 12690 /* To big */ 12691 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12692 error = EMSGSIZE; 12693 goto out; 12694 } 12695 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA); 12696 } 12697 if (mm == NULL) { 12698 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12699 error = ENOMEM; 12700 goto out; 12701 } 12702 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr); 12703 max_out -= sizeof(struct sctp_abort_msg); 12704 if (tot_out > max_out) { 12705 tot_out = max_out; 12706 } 12707 if (mm) { 12708 struct sctp_paramhdr *ph; 12709 12710 /* now move forward the data pointer */ 12711 ph = mtod(mm, struct sctp_paramhdr *); 12712 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 12713 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out); 12714 ph++; 12715 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr); 12716 if (top == NULL) { 12717 error = uiomove((caddr_t)ph, (int)tot_out, uio); 12718 if (error) { 12719 /*- 12720 * Here if we can't get his data we 12721 * still abort we just don't get to 12722 * send the users note :-0 12723 */ 12724 sctp_m_freem(mm); 12725 mm = NULL; 12726 } 12727 } else { 12728 if (sndlen != 0) { 12729 SCTP_BUF_NEXT(mm) = top; 12730 } 12731 } 12732 } 12733 if (hold_tcblock == 0) { 12734 SCTP_TCB_LOCK(stcb); 12735 } 12736 atomic_add_int(&stcb->asoc.refcnt, -1); 12737 free_cnt_applied = 0; 12738 /* release this lock, otherwise we hang on ourselves */ 12739 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED); 12740 /* now relock the stcb so everything is sane */ 12741 hold_tcblock = 0; 12742 stcb = NULL; 12743 /* 12744 * In this case top is already chained to mm avoid double 12745 * free, since we free it below if top != NULL and driver 12746 * would free it after sending the packet out 12747 */ 12748 if (sndlen != 0) { 12749 top = NULL; 12750 } 12751 goto out_unlocked; 12752 } 12753 /* Calculate the maximum we can send */ 12754 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12755 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { 12756 if (non_blocking) { 12757 /* we already checked for non-blocking above. */ 12758 max_len = sndlen; 12759 } else { 12760 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 12761 } 12762 } else { 12763 max_len = 0; 12764 } 12765 if (hold_tcblock) { 12766 SCTP_TCB_UNLOCK(stcb); 12767 hold_tcblock = 0; 12768 } 12769 /* Is the stream no. valid? */ 12770 if (srcv->sinfo_stream >= asoc->streamoutcnt) { 12771 /* Invalid stream number */ 12772 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12773 error = EINVAL; 12774 goto out_unlocked; 12775 } 12776 if (asoc->strmout == NULL) { 12777 /* huh? software error */ 12778 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 12779 error = EFAULT; 12780 goto out_unlocked; 12781 } 12782 /* Unless E_EOR mode is on, we must make a send FIT in one call. */ 12783 if ((user_marks_eor == 0) && 12784 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) { 12785 /* It will NEVER fit */ 12786 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12787 error = EMSGSIZE; 12788 goto out_unlocked; 12789 } 12790 if ((uio == NULL) && user_marks_eor) { 12791 /*- 12792 * We do not support eeor mode for 12793 * sending with mbuf chains (like sendfile). 12794 */ 12795 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12796 error = EINVAL; 12797 goto out_unlocked; 12798 } 12799 if (user_marks_eor) { 12800 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold)); 12801 } else { 12802 /*- 12803 * For non-eeor the whole message must fit in 12804 * the socket send buffer. 12805 */ 12806 local_add_more = sndlen; 12807 } 12808 len = 0; 12809 if (non_blocking) { 12810 goto skip_preblock; 12811 } 12812 if (((max_len <= local_add_more) && 12813 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) || 12814 (max_len == 0) || 12815 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12816 /* No room right now ! */ 12817 SOCKBUF_LOCK(&so->so_snd); 12818 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12819 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) || 12820 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12821 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n", 12822 (unsigned int)SCTP_SB_LIMIT_SND(so), 12823 inqueue_bytes, 12824 local_add_more, 12825 stcb->asoc.stream_queue_cnt, 12826 stcb->asoc.chunks_on_out_queue, 12827 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue)); 12828 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 12829 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen); 12830 } 12831 be.error = 0; 12832 stcb->block_entry = &be; 12833 error = sbwait(&so->so_snd); 12834 stcb->block_entry = NULL; 12835 if (error || so->so_error || be.error) { 12836 if (error == 0) { 12837 if (so->so_error) 12838 error = so->so_error; 12839 if (be.error) { 12840 error = be.error; 12841 } 12842 } 12843 SOCKBUF_UNLOCK(&so->so_snd); 12844 goto out_unlocked; 12845 } 12846 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 12847 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 12848 asoc, stcb->asoc.total_output_queue_size); 12849 } 12850 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12851 goto out_unlocked; 12852 } 12853 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12854 } 12855 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { 12856 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 12857 } else { 12858 max_len = 0; 12859 } 12860 SOCKBUF_UNLOCK(&so->so_snd); 12861 } 12862skip_preblock: 12863 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12864 goto out_unlocked; 12865 } 12866 /* 12867 * sndlen covers for mbuf case uio_resid covers for the non-mbuf 12868 * case NOTE: uio will be null when top/mbuf is passed 12869 */ 12870 if (sndlen == 0) { 12871 if (srcv->sinfo_flags & SCTP_EOF) { 12872 got_all_of_the_send = 1; 12873 goto dataless_eof; 12874 } else { 12875 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12876 error = EINVAL; 12877 goto out; 12878 } 12879 } 12880 if (top == NULL) { 12881 struct sctp_stream_queue_pending *sp; 12882 struct sctp_stream_out *strm; 12883 uint32_t sndout; 12884 12885 SCTP_TCB_SEND_LOCK(stcb); 12886 if ((asoc->stream_locked) && 12887 (asoc->stream_locked_on != srcv->sinfo_stream)) { 12888 SCTP_TCB_SEND_UNLOCK(stcb); 12889 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12890 error = EINVAL; 12891 goto out; 12892 } 12893 SCTP_TCB_SEND_UNLOCK(stcb); 12894 12895 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 12896 if (strm->last_msg_incomplete == 0) { 12897 do_a_copy_in: 12898 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error); 12899 if ((sp == NULL) || (error)) { 12900 goto out; 12901 } 12902 SCTP_TCB_SEND_LOCK(stcb); 12903 if (sp->msg_is_complete) { 12904 strm->last_msg_incomplete = 0; 12905 asoc->stream_locked = 0; 12906 } else { 12907 /* 12908 * Just got locked to this guy in case of an 12909 * interrupt. 12910 */ 12911 strm->last_msg_incomplete = 1; 12912 asoc->stream_locked = 1; 12913 asoc->stream_locked_on = srcv->sinfo_stream; 12914 sp->sender_all_done = 0; 12915 } 12916 sctp_snd_sb_alloc(stcb, sp->length); 12917 atomic_add_int(&asoc->stream_queue_cnt, 1); 12918 if (srcv->sinfo_flags & SCTP_UNORDERED) { 12919 SCTP_STAT_INCR(sctps_sends_with_unord); 12920 } 12921 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 12922 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1); 12923 SCTP_TCB_SEND_UNLOCK(stcb); 12924 } else { 12925 SCTP_TCB_SEND_LOCK(stcb); 12926 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead); 12927 SCTP_TCB_SEND_UNLOCK(stcb); 12928 if (sp == NULL) { 12929 /* ???? Huh ??? last msg is gone */ 12930#ifdef INVARIANTS 12931 panic("Warning: Last msg marked incomplete, yet nothing left?"); 12932#else 12933 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n"); 12934 strm->last_msg_incomplete = 0; 12935#endif 12936 goto do_a_copy_in; 12937 12938 } 12939 } 12940 while (uio->uio_resid > 0) { 12941 /* How much room do we have? */ 12942 struct mbuf *new_tail, *mm; 12943 12944 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 12945 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size; 12946 else 12947 max_len = 0; 12948 12949 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) || 12950 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) || 12951 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) { 12952 sndout = 0; 12953 new_tail = NULL; 12954 if (hold_tcblock) { 12955 SCTP_TCB_UNLOCK(stcb); 12956 hold_tcblock = 0; 12957 } 12958 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail); 12959 if ((mm == NULL) || error) { 12960 if (mm) { 12961 sctp_m_freem(mm); 12962 } 12963 goto out; 12964 } 12965 /* Update the mbuf and count */ 12966 SCTP_TCB_SEND_LOCK(stcb); 12967 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12968 /* 12969 * we need to get out. Peer probably 12970 * aborted. 12971 */ 12972 sctp_m_freem(mm); 12973 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) { 12974 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12975 error = ECONNRESET; 12976 } 12977 SCTP_TCB_SEND_UNLOCK(stcb); 12978 goto out; 12979 } 12980 if (sp->tail_mbuf) { 12981 /* tack it to the end */ 12982 SCTP_BUF_NEXT(sp->tail_mbuf) = mm; 12983 sp->tail_mbuf = new_tail; 12984 } else { 12985 /* A stolen mbuf */ 12986 sp->data = mm; 12987 sp->tail_mbuf = new_tail; 12988 } 12989 sctp_snd_sb_alloc(stcb, sndout); 12990 atomic_add_int(&sp->length, sndout); 12991 len += sndout; 12992 12993 /* Did we reach EOR? */ 12994 if ((uio->uio_resid == 0) && 12995 ((user_marks_eor == 0) || 12996 (srcv->sinfo_flags & SCTP_EOF) || 12997 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { 12998 sp->msg_is_complete = 1; 12999 } else { 13000 sp->msg_is_complete = 0; 13001 } 13002 SCTP_TCB_SEND_UNLOCK(stcb); 13003 } 13004 if (uio->uio_resid == 0) { 13005 /* got it all? */ 13006 continue; 13007 } 13008 /* PR-SCTP? */ 13009 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) { 13010 /* 13011 * This is ugly but we must assure locking 13012 * order 13013 */ 13014 if (hold_tcblock == 0) { 13015 SCTP_TCB_LOCK(stcb); 13016 hold_tcblock = 1; 13017 } 13018 sctp_prune_prsctp(stcb, asoc, srcv, sndlen); 13019 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 13020 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 13021 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 13022 else 13023 max_len = 0; 13024 if (max_len > 0) { 13025 continue; 13026 } 13027 SCTP_TCB_UNLOCK(stcb); 13028 hold_tcblock = 0; 13029 } 13030 /* wait for space now */ 13031 if (non_blocking) { 13032 /* Non-blocking io in place out */ 13033 goto skip_out_eof; 13034 } 13035 /* What about the INIT, send it maybe */ 13036 if (queue_only_for_init) { 13037 if (hold_tcblock == 0) { 13038 SCTP_TCB_LOCK(stcb); 13039 hold_tcblock = 1; 13040 } 13041 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 13042 /* a collision took us forward? */ 13043 queue_only = 0; 13044 } else { 13045 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 13046 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); 13047 queue_only = 1; 13048 } 13049 } 13050 if ((net->flight_size > net->cwnd) && 13051 (asoc->sctp_cmt_on_off == 0)) { 13052 SCTP_STAT_INCR(sctps_send_cwnd_avoid); 13053 queue_only = 1; 13054 } else if (asoc->ifp_had_enobuf) { 13055 SCTP_STAT_INCR(sctps_ifnomemqueued); 13056 if (net->flight_size > (2 * net->mtu)) { 13057 queue_only = 1; 13058 } 13059 asoc->ifp_had_enobuf = 0; 13060 } 13061 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 13062 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 13063 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 13064 (stcb->asoc.total_flight > 0) && 13065 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && 13066 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 13067 13068 /*- 13069 * Ok, Nagle is set on and we have data outstanding. 13070 * Don't send anything and let SACKs drive out the 13071 * data unless wen have a "full" segment to send. 13072 */ 13073 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13074 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 13075 } 13076 SCTP_STAT_INCR(sctps_naglequeued); 13077 nagle_applies = 1; 13078 } else { 13079 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13080 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 13081 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 13082 } 13083 SCTP_STAT_INCR(sctps_naglesent); 13084 nagle_applies = 0; 13085 } 13086 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13087 13088 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, 13089 nagle_applies, un_sent); 13090 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, 13091 stcb->asoc.total_flight, 13092 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); 13093 } 13094 if (queue_only_for_init) 13095 queue_only_for_init = 0; 13096 if ((queue_only == 0) && (nagle_applies == 0)) { 13097 /*- 13098 * need to start chunk output 13099 * before blocking.. note that if 13100 * a lock is already applied, then 13101 * the input via the net is happening 13102 * and I don't need to start output :-D 13103 */ 13104 if (hold_tcblock == 0) { 13105 if (SCTP_TCB_TRYLOCK(stcb)) { 13106 hold_tcblock = 1; 13107 sctp_chunk_output(inp, 13108 stcb, 13109 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13110 } 13111 } else { 13112 sctp_chunk_output(inp, 13113 stcb, 13114 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13115 } 13116 if (hold_tcblock == 1) { 13117 SCTP_TCB_UNLOCK(stcb); 13118 hold_tcblock = 0; 13119 } 13120 } 13121 SOCKBUF_LOCK(&so->so_snd); 13122 /*- 13123 * This is a bit strange, but I think it will 13124 * work. The total_output_queue_size is locked and 13125 * protected by the TCB_LOCK, which we just released. 13126 * There is a race that can occur between releasing it 13127 * above, and me getting the socket lock, where sacks 13128 * come in but we have not put the SB_WAIT on the 13129 * so_snd buffer to get the wakeup. After the LOCK 13130 * is applied the sack_processing will also need to 13131 * LOCK the so->so_snd to do the actual sowwakeup(). So 13132 * once we have the socket buffer lock if we recheck the 13133 * size we KNOW we will get to sleep safely with the 13134 * wakeup flag in place. 13135 */ 13136 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size + 13137 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) { 13138 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13139 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK, 13140 asoc, uio->uio_resid); 13141 } 13142 be.error = 0; 13143 stcb->block_entry = &be; 13144 error = sbwait(&so->so_snd); 13145 stcb->block_entry = NULL; 13146 13147 if (error || so->so_error || be.error) { 13148 if (error == 0) { 13149 if (so->so_error) 13150 error = so->so_error; 13151 if (be.error) { 13152 error = be.error; 13153 } 13154 } 13155 SOCKBUF_UNLOCK(&so->so_snd); 13156 goto out_unlocked; 13157 } 13158 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13159 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 13160 asoc, stcb->asoc.total_output_queue_size); 13161 } 13162 } 13163 SOCKBUF_UNLOCK(&so->so_snd); 13164 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 13165 goto out_unlocked; 13166 } 13167 } 13168 SCTP_TCB_SEND_LOCK(stcb); 13169 if (sp) { 13170 if (sp->msg_is_complete == 0) { 13171 strm->last_msg_incomplete = 1; 13172 asoc->stream_locked = 1; 13173 asoc->stream_locked_on = srcv->sinfo_stream; 13174 } else { 13175 sp->sender_all_done = 1; 13176 strm->last_msg_incomplete = 0; 13177 asoc->stream_locked = 0; 13178 } 13179 } else { 13180 SCTP_PRINTF("Huh no sp TSNH?\n"); 13181 strm->last_msg_incomplete = 0; 13182 asoc->stream_locked = 0; 13183 } 13184 SCTP_TCB_SEND_UNLOCK(stcb); 13185 if (uio->uio_resid == 0) { 13186 got_all_of_the_send = 1; 13187 } 13188 } else { 13189 /* We send in a 0, since we do NOT have any locks */ 13190 error = sctp_msg_append(stcb, net, top, srcv, 0); 13191 top = NULL; 13192 if (srcv->sinfo_flags & SCTP_EOF) { 13193 /* 13194 * This should only happen for Panda for the mbuf 13195 * send case, which does NOT yet support EEOR mode. 13196 * Thus, we can just set this flag to do the proper 13197 * EOF handling. 13198 */ 13199 got_all_of_the_send = 1; 13200 } 13201 } 13202 if (error) { 13203 goto out; 13204 } 13205dataless_eof: 13206 /* EOF thing ? */ 13207 if ((srcv->sinfo_flags & SCTP_EOF) && 13208 (got_all_of_the_send == 1)) { 13209 int cnt; 13210 13211 SCTP_STAT_INCR(sctps_sends_with_eof); 13212 error = 0; 13213 if (hold_tcblock == 0) { 13214 SCTP_TCB_LOCK(stcb); 13215 hold_tcblock = 1; 13216 } 13217 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED); 13218 if (TAILQ_EMPTY(&asoc->send_queue) && 13219 TAILQ_EMPTY(&asoc->sent_queue) && 13220 (cnt == 0)) { 13221 if (asoc->locked_on_sending) { 13222 goto abort_anyway; 13223 } 13224 /* there is nothing queued to send, so I'm done... */ 13225 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 13226 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 13227 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 13228 struct sctp_nets *netp; 13229 13230 /* only send SHUTDOWN the first time through */ 13231 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 13232 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 13233 } 13234 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 13235 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 13236 sctp_stop_timers_for_shutdown(stcb); 13237 if (stcb->asoc.alternate) { 13238 netp = stcb->asoc.alternate; 13239 } else { 13240 netp = stcb->asoc.primary_destination; 13241 } 13242 sctp_send_shutdown(stcb, netp); 13243 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 13244 netp); 13245 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 13246 asoc->primary_destination); 13247 } 13248 } else { 13249 /*- 13250 * we still got (or just got) data to send, so set 13251 * SHUTDOWN_PENDING 13252 */ 13253 /*- 13254 * XXX sockets draft says that SCTP_EOF should be 13255 * sent with no data. currently, we will allow user 13256 * data to be sent first and move to 13257 * SHUTDOWN-PENDING 13258 */ 13259 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 13260 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 13261 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 13262 if (hold_tcblock == 0) { 13263 SCTP_TCB_LOCK(stcb); 13264 hold_tcblock = 1; 13265 } 13266 if (asoc->locked_on_sending) { 13267 /* Locked to send out the data */ 13268 struct sctp_stream_queue_pending *sp; 13269 13270 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 13271 if (sp) { 13272 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 13273 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 13274 } 13275 } 13276 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 13277 if (TAILQ_EMPTY(&asoc->send_queue) && 13278 TAILQ_EMPTY(&asoc->sent_queue) && 13279 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 13280 abort_anyway: 13281 if (free_cnt_applied) { 13282 atomic_add_int(&stcb->asoc.refcnt, -1); 13283 free_cnt_applied = 0; 13284 } 13285 sctp_abort_an_association(stcb->sctp_ep, stcb, 13286 NULL, SCTP_SO_LOCKED); 13287 /* 13288 * now relock the stcb so everything 13289 * is sane 13290 */ 13291 hold_tcblock = 0; 13292 stcb = NULL; 13293 goto out; 13294 } 13295 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 13296 asoc->primary_destination); 13297 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY); 13298 } 13299 } 13300 } 13301skip_out_eof: 13302 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { 13303 some_on_control = 1; 13304 } 13305 if (queue_only_for_init) { 13306 if (hold_tcblock == 0) { 13307 SCTP_TCB_LOCK(stcb); 13308 hold_tcblock = 1; 13309 } 13310 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 13311 /* a collision took us forward? */ 13312 queue_only = 0; 13313 } else { 13314 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 13315 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT); 13316 queue_only = 1; 13317 } 13318 } 13319 if ((net->flight_size > net->cwnd) && 13320 (stcb->asoc.sctp_cmt_on_off == 0)) { 13321 SCTP_STAT_INCR(sctps_send_cwnd_avoid); 13322 queue_only = 1; 13323 } else if (asoc->ifp_had_enobuf) { 13324 SCTP_STAT_INCR(sctps_ifnomemqueued); 13325 if (net->flight_size > (2 * net->mtu)) { 13326 queue_only = 1; 13327 } 13328 asoc->ifp_had_enobuf = 0; 13329 } 13330 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 13331 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 13332 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 13333 (stcb->asoc.total_flight > 0) && 13334 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && 13335 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 13336 /*- 13337 * Ok, Nagle is set on and we have data outstanding. 13338 * Don't send anything and let SACKs drive out the 13339 * data unless wen have a "full" segment to send. 13340 */ 13341 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13342 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 13343 } 13344 SCTP_STAT_INCR(sctps_naglequeued); 13345 nagle_applies = 1; 13346 } else { 13347 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13348 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 13349 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 13350 } 13351 SCTP_STAT_INCR(sctps_naglesent); 13352 nagle_applies = 0; 13353 } 13354 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13355 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, 13356 nagle_applies, un_sent); 13357 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, 13358 stcb->asoc.total_flight, 13359 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); 13360 } 13361 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) { 13362 /* we can attempt to send too. */ 13363 if (hold_tcblock == 0) { 13364 /* 13365 * If there is activity recv'ing sacks no need to 13366 * send 13367 */ 13368 if (SCTP_TCB_TRYLOCK(stcb)) { 13369 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13370 hold_tcblock = 1; 13371 } 13372 } else { 13373 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13374 } 13375 } else if ((queue_only == 0) && 13376 (stcb->asoc.peers_rwnd == 0) && 13377 (stcb->asoc.total_flight == 0)) { 13378 /* We get to have a probe outstanding */ 13379 if (hold_tcblock == 0) { 13380 hold_tcblock = 1; 13381 SCTP_TCB_LOCK(stcb); 13382 } 13383 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13384 } else if (some_on_control) { 13385 int num_out, reason, frag_point; 13386 13387 /* Here we do control only */ 13388 if (hold_tcblock == 0) { 13389 hold_tcblock = 1; 13390 SCTP_TCB_LOCK(stcb); 13391 } 13392 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 13393 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 13394 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED); 13395 } 13396 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n", 13397 queue_only, stcb->asoc.peers_rwnd, un_sent, 13398 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue, 13399 stcb->asoc.total_output_queue_size, error); 13400 13401out: 13402out_unlocked: 13403 13404 if (local_soresv && stcb) { 13405 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen); 13406 } 13407 if (create_lock_applied) { 13408 SCTP_ASOC_CREATE_UNLOCK(inp); 13409 } 13410 if ((stcb) && hold_tcblock) { 13411 SCTP_TCB_UNLOCK(stcb); 13412 } 13413 if (stcb && free_cnt_applied) { 13414 atomic_add_int(&stcb->asoc.refcnt, -1); 13415 } 13416#ifdef INVARIANTS 13417 if (stcb) { 13418 if (mtx_owned(&stcb->tcb_mtx)) { 13419 panic("Leaving with tcb mtx owned?"); 13420 } 13421 if (mtx_owned(&stcb->tcb_send_mtx)) { 13422 panic("Leaving with tcb send mtx owned?"); 13423 } 13424 } 13425#endif 13426#ifdef INVARIANTS 13427 if (inp) { 13428 sctp_validate_no_locks(inp); 13429 } else { 13430 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n"); 13431 } 13432#endif 13433 if (top) { 13434 sctp_m_freem(top); 13435 } 13436 if (control) { 13437 sctp_m_freem(control); 13438 } 13439 return (error); 13440} 13441 13442 13443/* 13444 * generate an AUTHentication chunk, if required 13445 */ 13446struct mbuf * 13447sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end, 13448 struct sctp_auth_chunk **auth_ret, uint32_t * offset, 13449 struct sctp_tcb *stcb, uint8_t chunk) 13450{ 13451 struct mbuf *m_auth; 13452 struct sctp_auth_chunk *auth; 13453 int chunk_len; 13454 struct mbuf *cn; 13455 13456 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) || 13457 (stcb == NULL)) 13458 return (m); 13459 13460 if (stcb->asoc.auth_supported == 0) { 13461 return (m); 13462 } 13463 /* does the requested chunk require auth? */ 13464 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) { 13465 return (m); 13466 } 13467 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER); 13468 if (m_auth == NULL) { 13469 /* no mbuf's */ 13470 return (m); 13471 } 13472 /* reserve some space if this will be the first mbuf */ 13473 if (m == NULL) 13474 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD); 13475 /* fill in the AUTH chunk details */ 13476 auth = mtod(m_auth, struct sctp_auth_chunk *); 13477 bzero(auth, sizeof(*auth)); 13478 auth->ch.chunk_type = SCTP_AUTHENTICATION; 13479 auth->ch.chunk_flags = 0; 13480 chunk_len = sizeof(*auth) + 13481 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id); 13482 auth->ch.chunk_length = htons(chunk_len); 13483 auth->hmac_id = htons(stcb->asoc.peer_hmac_id); 13484 /* key id and hmac digest will be computed and filled in upon send */ 13485 13486 /* save the offset where the auth was inserted into the chain */ 13487 *offset = 0; 13488 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) { 13489 *offset += SCTP_BUF_LEN(cn); 13490 } 13491 13492 /* update length and return pointer to the auth chunk */ 13493 SCTP_BUF_LEN(m_auth) = chunk_len; 13494 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0); 13495 if (auth_ret != NULL) 13496 *auth_ret = auth; 13497 13498 return (m); 13499} 13500 13501#ifdef INET6 13502int 13503sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro) 13504{ 13505 struct nd_prefix *pfx = NULL; 13506 struct nd_pfxrouter *pfxrtr = NULL; 13507 struct sockaddr_in6 gw6; 13508 13509 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6) 13510 return (0); 13511 13512 /* get prefix entry of address */ 13513 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) { 13514 if (pfx->ndpr_stateflags & NDPRF_DETACHED) 13515 continue; 13516 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr, 13517 &src6->sin6_addr, &pfx->ndpr_mask)) 13518 break; 13519 } 13520 /* no prefix entry in the prefix list */ 13521 if (pfx == NULL) { 13522 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for "); 13523 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); 13524 return (0); 13525 } 13526 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is "); 13527 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); 13528 13529 /* search installed gateway from prefix entry */ 13530 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) { 13531 memset(&gw6, 0, sizeof(struct sockaddr_in6)); 13532 gw6.sin6_family = AF_INET6; 13533 gw6.sin6_len = sizeof(struct sockaddr_in6); 13534 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr, 13535 sizeof(struct in6_addr)); 13536 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is "); 13537 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6); 13538 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is "); 13539 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); 13540 if (sctp_cmpaddr((struct sockaddr *)&gw6, 13541 ro->ro_rt->rt_gateway)) { 13542 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n"); 13543 return (1); 13544 } 13545 } 13546 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n"); 13547 return (0); 13548} 13549 13550#endif 13551 13552int 13553sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro) 13554{ 13555#ifdef INET 13556 struct sockaddr_in *sin, *mask; 13557 struct ifaddr *ifa; 13558 struct in_addr srcnetaddr, gwnetaddr; 13559 13560 if (ro == NULL || ro->ro_rt == NULL || 13561 sifa->address.sa.sa_family != AF_INET) { 13562 return (0); 13563 } 13564 ifa = (struct ifaddr *)sifa->ifa; 13565 mask = (struct sockaddr_in *)(ifa->ifa_netmask); 13566 sin = &sifa->address.sin; 13567 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); 13568 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is "); 13569 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa); 13570 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr); 13571 13572 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway; 13573 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); 13574 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is "); 13575 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); 13576 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr); 13577 if (srcnetaddr.s_addr == gwnetaddr.s_addr) { 13578 return (1); 13579 } 13580#endif 13581 return (0); 13582} 13583