sctp_output.c revision 283708
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: stable/10/sys/netinet/sctp_output.c 283708 2015-05-29 12:03:02Z tuexen $"); 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 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY); 3850 } 3851#endif 3852 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL, 3853 M_NOWAIT); 3854 if (copy_initack == NULL) { 3855 sctp_m_freem(mret); 3856 sctp_m_freem(copy_init); 3857 return (NULL); 3858 } 3859#ifdef SCTP_MBUF_LOGGING 3860 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 3861 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY); 3862 } 3863#endif 3864 /* easy side we just drop it on the end */ 3865 ph = mtod(mret, struct sctp_paramhdr *); 3866 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) + 3867 sizeof(struct sctp_paramhdr); 3868 stc = (struct sctp_state_cookie *)((caddr_t)ph + 3869 sizeof(struct sctp_paramhdr)); 3870 ph->param_type = htons(SCTP_STATE_COOKIE); 3871 ph->param_length = 0; /* fill in at the end */ 3872 /* Fill in the stc cookie data */ 3873 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie)); 3874 3875 /* tack the INIT and then the INIT-ACK onto the chain */ 3876 cookie_sz = 0; 3877 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3878 cookie_sz += SCTP_BUF_LEN(m_at); 3879 if (SCTP_BUF_NEXT(m_at) == NULL) { 3880 SCTP_BUF_NEXT(m_at) = copy_init; 3881 break; 3882 } 3883 } 3884 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3885 cookie_sz += SCTP_BUF_LEN(m_at); 3886 if (SCTP_BUF_NEXT(m_at) == NULL) { 3887 SCTP_BUF_NEXT(m_at) = copy_initack; 3888 break; 3889 } 3890 } 3891 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3892 cookie_sz += SCTP_BUF_LEN(m_at); 3893 if (SCTP_BUF_NEXT(m_at) == NULL) { 3894 break; 3895 } 3896 } 3897 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA); 3898 if (sig == NULL) { 3899 /* no space, so free the entire chain */ 3900 sctp_m_freem(mret); 3901 return (NULL); 3902 } 3903 SCTP_BUF_LEN(sig) = 0; 3904 SCTP_BUF_NEXT(m_at) = sig; 3905 sig_offset = 0; 3906 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset); 3907 memset(foo, 0, SCTP_SIGNATURE_SIZE); 3908 *signature = foo; 3909 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE; 3910 cookie_sz += SCTP_SIGNATURE_SIZE; 3911 ph->param_length = htons(cookie_sz); 3912 return (mret); 3913} 3914 3915 3916static uint8_t 3917sctp_get_ect(struct sctp_tcb *stcb) 3918{ 3919 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) { 3920 return (SCTP_ECT0_BIT); 3921 } else { 3922 return (0); 3923 } 3924} 3925 3926#if defined(INET) || defined(INET6) 3927static void 3928sctp_handle_no_route(struct sctp_tcb *stcb, 3929 struct sctp_nets *net, 3930 int so_locked) 3931{ 3932 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n"); 3933 3934 if (net) { 3935 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was "); 3936 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa); 3937 if (net->dest_state & SCTP_ADDR_CONFIRMED) { 3938 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) { 3939 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net); 3940 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 3941 stcb, 0, 3942 (void *)net, 3943 so_locked); 3944 net->dest_state &= ~SCTP_ADDR_REACHABLE; 3945 net->dest_state &= ~SCTP_ADDR_PF; 3946 } 3947 } 3948 if (stcb) { 3949 if (net == stcb->asoc.primary_destination) { 3950 /* need a new primary */ 3951 struct sctp_nets *alt; 3952 3953 alt = sctp_find_alternate_net(stcb, net, 0); 3954 if (alt != net) { 3955 if (stcb->asoc.alternate) { 3956 sctp_free_remote_addr(stcb->asoc.alternate); 3957 } 3958 stcb->asoc.alternate = alt; 3959 atomic_add_int(&stcb->asoc.alternate->ref_count, 1); 3960 if (net->ro._s_addr) { 3961 sctp_free_ifa(net->ro._s_addr); 3962 net->ro._s_addr = NULL; 3963 } 3964 net->src_addr_selected = 0; 3965 } 3966 } 3967 } 3968 } 3969} 3970 3971#endif 3972 3973static int 3974sctp_lowlevel_chunk_output(struct sctp_inpcb *inp, 3975 struct sctp_tcb *stcb, /* may be NULL */ 3976 struct sctp_nets *net, 3977 struct sockaddr *to, 3978 struct mbuf *m, 3979 uint32_t auth_offset, 3980 struct sctp_auth_chunk *auth, 3981 uint16_t auth_keyid, 3982 int nofragment_flag, 3983 int ecn_ok, 3984 int out_of_asoc_ok, 3985 uint16_t src_port, 3986 uint16_t dest_port, 3987 uint32_t v_tag, 3988 uint16_t port, 3989 union sctp_sockstore *over_addr, 3990 uint8_t mflowtype, uint32_t mflowid, 3991#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 3992 int so_locked SCTP_UNUSED 3993#else 3994 int so_locked 3995#endif 3996) 3997/* nofragment_flag to tell if IP_DF should be set (IPv4 only) */ 3998{ 3999 /** 4000 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header 4001 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure: 4002 * - fill in the HMAC digest of any AUTH chunk in the packet. 4003 * - calculate and fill in the SCTP checksum. 4004 * - prepend an IP address header. 4005 * - if boundall use INADDR_ANY. 4006 * - if boundspecific do source address selection. 4007 * - set fragmentation option for ipV4. 4008 * - On return from IP output, check/adjust mtu size of output 4009 * interface and smallest_mtu size as well. 4010 */ 4011 /* Will need ifdefs around this */ 4012 struct mbuf *newm; 4013 struct sctphdr *sctphdr; 4014 int packet_length; 4015 int ret; 4016 4017#if defined(INET) || defined(INET6) 4018 uint32_t vrf_id; 4019 4020#endif 4021#if defined(INET) || defined(INET6) 4022 struct mbuf *o_pak; 4023 sctp_route_t *ro = NULL; 4024 struct udphdr *udp = NULL; 4025 4026#endif 4027 uint8_t tos_value; 4028 4029#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4030 struct socket *so = NULL; 4031 4032#endif 4033 4034 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) { 4035 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 4036 sctp_m_freem(m); 4037 return (EFAULT); 4038 } 4039#if defined(INET) || defined(INET6) 4040 if (stcb) { 4041 vrf_id = stcb->asoc.vrf_id; 4042 } else { 4043 vrf_id = inp->def_vrf_id; 4044 } 4045#endif 4046 /* fill in the HMAC digest for any AUTH chunk in the packet */ 4047 if ((auth != NULL) && (stcb != NULL)) { 4048 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid); 4049 } 4050 if (net) { 4051 tos_value = net->dscp; 4052 } else if (stcb) { 4053 tos_value = stcb->asoc.default_dscp; 4054 } else { 4055 tos_value = inp->sctp_ep.default_dscp; 4056 } 4057 4058 switch (to->sa_family) { 4059#ifdef INET 4060 case AF_INET: 4061 { 4062 struct ip *ip = NULL; 4063 sctp_route_t iproute; 4064 int len; 4065 4066 len = sizeof(struct ip) + sizeof(struct sctphdr); 4067 if (port) { 4068 len += sizeof(struct udphdr); 4069 } 4070 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA); 4071 if (newm == NULL) { 4072 sctp_m_freem(m); 4073 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4074 return (ENOMEM); 4075 } 4076 SCTP_ALIGN_TO_END(newm, len); 4077 SCTP_BUF_LEN(newm) = len; 4078 SCTP_BUF_NEXT(newm) = m; 4079 m = newm; 4080 if (net != NULL) { 4081 m->m_pkthdr.flowid = net->flowid; 4082 M_HASHTYPE_SET(m, net->flowtype); 4083 } else { 4084 m->m_pkthdr.flowid = mflowid; 4085 M_HASHTYPE_SET(m, mflowtype); 4086 } 4087 packet_length = sctp_calculate_len(m); 4088 ip = mtod(m, struct ip *); 4089 ip->ip_v = IPVERSION; 4090 ip->ip_hl = (sizeof(struct ip) >> 2); 4091 if (tos_value == 0) { 4092 /* 4093 * This means especially, that it is not set 4094 * at the SCTP layer. So use the value from 4095 * the IP layer. 4096 */ 4097 tos_value = inp->ip_inp.inp.inp_ip_tos; 4098 } 4099 tos_value &= 0xfc; 4100 if (ecn_ok) { 4101 tos_value |= sctp_get_ect(stcb); 4102 } 4103 if ((nofragment_flag) && (port == 0)) { 4104 ip->ip_off = htons(IP_DF); 4105 } else { 4106 ip->ip_off = htons(0); 4107 } 4108 /* FreeBSD has a function for ip_id's */ 4109 ip->ip_id = ip_newid(); 4110 4111 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl; 4112 ip->ip_len = htons(packet_length); 4113 ip->ip_tos = tos_value; 4114 if (port) { 4115 ip->ip_p = IPPROTO_UDP; 4116 } else { 4117 ip->ip_p = IPPROTO_SCTP; 4118 } 4119 ip->ip_sum = 0; 4120 if (net == NULL) { 4121 ro = &iproute; 4122 memset(&iproute, 0, sizeof(iproute)); 4123 memcpy(&ro->ro_dst, to, to->sa_len); 4124 } else { 4125 ro = (sctp_route_t *) & net->ro; 4126 } 4127 /* Now the address selection part */ 4128 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr; 4129 4130 /* call the routine to select the src address */ 4131 if (net && out_of_asoc_ok == 0) { 4132 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) { 4133 sctp_free_ifa(net->ro._s_addr); 4134 net->ro._s_addr = NULL; 4135 net->src_addr_selected = 0; 4136 if (ro->ro_rt) { 4137 RTFREE(ro->ro_rt); 4138 ro->ro_rt = NULL; 4139 } 4140 } 4141 if (net->src_addr_selected == 0) { 4142 /* Cache the source address */ 4143 net->ro._s_addr = sctp_source_address_selection(inp, stcb, 4144 ro, net, 0, 4145 vrf_id); 4146 net->src_addr_selected = 1; 4147 } 4148 if (net->ro._s_addr == NULL) { 4149 /* No route to host */ 4150 net->src_addr_selected = 0; 4151 sctp_handle_no_route(stcb, net, so_locked); 4152 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4153 sctp_m_freem(m); 4154 return (EHOSTUNREACH); 4155 } 4156 ip->ip_src = net->ro._s_addr->address.sin.sin_addr; 4157 } else { 4158 if (over_addr == NULL) { 4159 struct sctp_ifa *_lsrc; 4160 4161 _lsrc = sctp_source_address_selection(inp, stcb, ro, 4162 net, 4163 out_of_asoc_ok, 4164 vrf_id); 4165 if (_lsrc == NULL) { 4166 sctp_handle_no_route(stcb, net, so_locked); 4167 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4168 sctp_m_freem(m); 4169 return (EHOSTUNREACH); 4170 } 4171 ip->ip_src = _lsrc->address.sin.sin_addr; 4172 sctp_free_ifa(_lsrc); 4173 } else { 4174 ip->ip_src = over_addr->sin.sin_addr; 4175 SCTP_RTALLOC(ro, vrf_id); 4176 } 4177 } 4178 if (port) { 4179 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 4180 sctp_handle_no_route(stcb, net, so_locked); 4181 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4182 sctp_m_freem(m); 4183 return (EHOSTUNREACH); 4184 } 4185 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip)); 4186 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4187 udp->uh_dport = port; 4188 udp->uh_ulen = htons(packet_length - sizeof(struct ip)); 4189 if (V_udp_cksum) { 4190 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 4191 } else { 4192 udp->uh_sum = 0; 4193 } 4194 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); 4195 } else { 4196 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip)); 4197 } 4198 4199 sctphdr->src_port = src_port; 4200 sctphdr->dest_port = dest_port; 4201 sctphdr->v_tag = v_tag; 4202 sctphdr->checksum = 0; 4203 4204 /* 4205 * If source address selection fails and we find no 4206 * route then the ip_output should fail as well with 4207 * a NO_ROUTE_TO_HOST type error. We probably should 4208 * catch that somewhere and abort the association 4209 * right away (assuming this is an INIT being sent). 4210 */ 4211 if (ro->ro_rt == NULL) { 4212 /* 4213 * src addr selection failed to find a route 4214 * (or valid source addr), so we can't get 4215 * there from here (yet)! 4216 */ 4217 sctp_handle_no_route(stcb, net, so_locked); 4218 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4219 sctp_m_freem(m); 4220 return (EHOSTUNREACH); 4221 } 4222 if (ro != &iproute) { 4223 memcpy(&iproute, ro, sizeof(*ro)); 4224 } 4225 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n", 4226 (uint32_t) (ntohl(ip->ip_src.s_addr))); 4227 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n", 4228 (uint32_t) (ntohl(ip->ip_dst.s_addr))); 4229 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n", 4230 (void *)ro->ro_rt); 4231 4232 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 4233 /* failed to prepend data, give up */ 4234 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4235 sctp_m_freem(m); 4236 return (ENOMEM); 4237 } 4238 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 4239 if (port) { 4240#if defined(SCTP_WITH_NO_CSUM) 4241 SCTP_STAT_INCR(sctps_sendnocrc); 4242#else 4243 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr)); 4244 SCTP_STAT_INCR(sctps_sendswcrc); 4245#endif 4246 if (V_udp_cksum) { 4247 SCTP_ENABLE_UDP_CSUM(o_pak); 4248 } 4249 } else { 4250#if defined(SCTP_WITH_NO_CSUM) 4251 SCTP_STAT_INCR(sctps_sendnocrc); 4252#else 4253 m->m_pkthdr.csum_flags = CSUM_SCTP; 4254 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 4255 SCTP_STAT_INCR(sctps_sendhwcrc); 4256#endif 4257 } 4258#ifdef SCTP_PACKET_LOGGING 4259 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 4260 sctp_packet_log(o_pak); 4261#endif 4262 /* send it out. table id is taken from stcb */ 4263#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4264 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4265 so = SCTP_INP_SO(inp); 4266 SCTP_SOCKET_UNLOCK(so, 0); 4267 } 4268#endif 4269 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id); 4270#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4271 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4272 atomic_add_int(&stcb->asoc.refcnt, 1); 4273 SCTP_TCB_UNLOCK(stcb); 4274 SCTP_SOCKET_LOCK(so, 0); 4275 SCTP_TCB_LOCK(stcb); 4276 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4277 } 4278#endif 4279 SCTP_STAT_INCR(sctps_sendpackets); 4280 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 4281 if (ret) 4282 SCTP_STAT_INCR(sctps_senderrors); 4283 4284 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret); 4285 if (net == NULL) { 4286 /* free tempy routes */ 4287 RO_RTFREE(ro); 4288 } else { 4289 /* 4290 * PMTU check versus smallest asoc MTU goes 4291 * here 4292 */ 4293 if ((ro->ro_rt != NULL) && 4294 (net->ro._s_addr)) { 4295 uint32_t mtu; 4296 4297 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); 4298 if (net->port) { 4299 mtu -= sizeof(struct udphdr); 4300 } 4301 if (mtu && (stcb->asoc.smallest_mtu > mtu)) { 4302 sctp_mtu_size_reset(inp, &stcb->asoc, mtu); 4303 net->mtu = mtu; 4304 } 4305 } else if (ro->ro_rt == NULL) { 4306 /* route was freed */ 4307 if (net->ro._s_addr && 4308 net->src_addr_selected) { 4309 sctp_free_ifa(net->ro._s_addr); 4310 net->ro._s_addr = NULL; 4311 } 4312 net->src_addr_selected = 0; 4313 } 4314 } 4315 return (ret); 4316 } 4317#endif 4318#ifdef INET6 4319 case AF_INET6: 4320 { 4321 uint32_t flowlabel, flowinfo; 4322 struct ip6_hdr *ip6h; 4323 struct route_in6 ip6route; 4324 struct ifnet *ifp; 4325 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp; 4326 int prev_scope = 0; 4327 struct sockaddr_in6 lsa6_storage; 4328 int error; 4329 u_short prev_port = 0; 4330 int len; 4331 4332 if (net) { 4333 flowlabel = net->flowlabel; 4334 } else if (stcb) { 4335 flowlabel = stcb->asoc.default_flowlabel; 4336 } else { 4337 flowlabel = inp->sctp_ep.default_flowlabel; 4338 } 4339 if (flowlabel == 0) { 4340 /* 4341 * This means especially, that it is not set 4342 * at the SCTP layer. So use the value from 4343 * the IP layer. 4344 */ 4345 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo); 4346 } 4347 flowlabel &= 0x000fffff; 4348 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr); 4349 if (port) { 4350 len += sizeof(struct udphdr); 4351 } 4352 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA); 4353 if (newm == NULL) { 4354 sctp_m_freem(m); 4355 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4356 return (ENOMEM); 4357 } 4358 SCTP_ALIGN_TO_END(newm, len); 4359 SCTP_BUF_LEN(newm) = len; 4360 SCTP_BUF_NEXT(newm) = m; 4361 m = newm; 4362 if (net != NULL) { 4363 m->m_pkthdr.flowid = net->flowid; 4364 M_HASHTYPE_SET(m, net->flowtype); 4365 } else { 4366 m->m_pkthdr.flowid = mflowid; 4367 M_HASHTYPE_SET(m, mflowtype); 4368 } 4369 packet_length = sctp_calculate_len(m); 4370 4371 ip6h = mtod(m, struct ip6_hdr *); 4372 /* protect *sin6 from overwrite */ 4373 sin6 = (struct sockaddr_in6 *)to; 4374 tmp = *sin6; 4375 sin6 = &tmp; 4376 4377 /* KAME hack: embed scopeid */ 4378 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4379 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4380 return (EINVAL); 4381 } 4382 if (net == NULL) { 4383 memset(&ip6route, 0, sizeof(ip6route)); 4384 ro = (sctp_route_t *) & ip6route; 4385 memcpy(&ro->ro_dst, sin6, sin6->sin6_len); 4386 } else { 4387 ro = (sctp_route_t *) & net->ro; 4388 } 4389 /* 4390 * We assume here that inp_flow is in host byte 4391 * order within the TCB! 4392 */ 4393 if (tos_value == 0) { 4394 /* 4395 * This means especially, that it is not set 4396 * at the SCTP layer. So use the value from 4397 * the IP layer. 4398 */ 4399 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff; 4400 } 4401 tos_value &= 0xfc; 4402 if (ecn_ok) { 4403 tos_value |= sctp_get_ect(stcb); 4404 } 4405 flowinfo = 0x06; 4406 flowinfo <<= 8; 4407 flowinfo |= tos_value; 4408 flowinfo <<= 20; 4409 flowinfo |= flowlabel; 4410 ip6h->ip6_flow = htonl(flowinfo); 4411 if (port) { 4412 ip6h->ip6_nxt = IPPROTO_UDP; 4413 } else { 4414 ip6h->ip6_nxt = IPPROTO_SCTP; 4415 } 4416 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr)); 4417 ip6h->ip6_dst = sin6->sin6_addr; 4418 4419 /* 4420 * Add SRC address selection here: we can only reuse 4421 * to a limited degree the kame src-addr-sel, since 4422 * we can try their selection but it may not be 4423 * bound. 4424 */ 4425 bzero(&lsa6_tmp, sizeof(lsa6_tmp)); 4426 lsa6_tmp.sin6_family = AF_INET6; 4427 lsa6_tmp.sin6_len = sizeof(lsa6_tmp); 4428 lsa6 = &lsa6_tmp; 4429 if (net && out_of_asoc_ok == 0) { 4430 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) { 4431 sctp_free_ifa(net->ro._s_addr); 4432 net->ro._s_addr = NULL; 4433 net->src_addr_selected = 0; 4434 if (ro->ro_rt) { 4435 RTFREE(ro->ro_rt); 4436 ro->ro_rt = NULL; 4437 } 4438 } 4439 if (net->src_addr_selected == 0) { 4440 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4441 /* KAME hack: embed scopeid */ 4442 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4443 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4444 return (EINVAL); 4445 } 4446 /* Cache the source address */ 4447 net->ro._s_addr = sctp_source_address_selection(inp, 4448 stcb, 4449 ro, 4450 net, 4451 0, 4452 vrf_id); 4453 (void)sa6_recoverscope(sin6); 4454 net->src_addr_selected = 1; 4455 } 4456 if (net->ro._s_addr == NULL) { 4457 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n"); 4458 net->src_addr_selected = 0; 4459 sctp_handle_no_route(stcb, net, so_locked); 4460 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4461 sctp_m_freem(m); 4462 return (EHOSTUNREACH); 4463 } 4464 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr; 4465 } else { 4466 sin6 = (struct sockaddr_in6 *)&ro->ro_dst; 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 if (over_addr == NULL) { 4473 struct sctp_ifa *_lsrc; 4474 4475 _lsrc = sctp_source_address_selection(inp, stcb, ro, 4476 net, 4477 out_of_asoc_ok, 4478 vrf_id); 4479 if (_lsrc == NULL) { 4480 sctp_handle_no_route(stcb, net, so_locked); 4481 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4482 sctp_m_freem(m); 4483 return (EHOSTUNREACH); 4484 } 4485 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr; 4486 sctp_free_ifa(_lsrc); 4487 } else { 4488 lsa6->sin6_addr = over_addr->sin6.sin6_addr; 4489 SCTP_RTALLOC(ro, vrf_id); 4490 } 4491 (void)sa6_recoverscope(sin6); 4492 } 4493 lsa6->sin6_port = inp->sctp_lport; 4494 4495 if (ro->ro_rt == NULL) { 4496 /* 4497 * src addr selection failed to find a route 4498 * (or valid source addr), so we can't get 4499 * there from here! 4500 */ 4501 sctp_handle_no_route(stcb, net, so_locked); 4502 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4503 sctp_m_freem(m); 4504 return (EHOSTUNREACH); 4505 } 4506 /* 4507 * XXX: sa6 may not have a valid sin6_scope_id in 4508 * the non-SCOPEDROUTING case. 4509 */ 4510 bzero(&lsa6_storage, sizeof(lsa6_storage)); 4511 lsa6_storage.sin6_family = AF_INET6; 4512 lsa6_storage.sin6_len = sizeof(lsa6_storage); 4513 lsa6_storage.sin6_addr = lsa6->sin6_addr; 4514 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) { 4515 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error); 4516 sctp_m_freem(m); 4517 return (error); 4518 } 4519 /* XXX */ 4520 lsa6_storage.sin6_addr = lsa6->sin6_addr; 4521 lsa6_storage.sin6_port = inp->sctp_lport; 4522 lsa6 = &lsa6_storage; 4523 ip6h->ip6_src = lsa6->sin6_addr; 4524 4525 if (port) { 4526 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 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 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); 4533 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4534 udp->uh_dport = port; 4535 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr)); 4536 udp->uh_sum = 0; 4537 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); 4538 } else { 4539 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); 4540 } 4541 4542 sctphdr->src_port = src_port; 4543 sctphdr->dest_port = dest_port; 4544 sctphdr->v_tag = v_tag; 4545 sctphdr->checksum = 0; 4546 4547 /* 4548 * We set the hop limit now since there is a good 4549 * chance that our ro pointer is now filled 4550 */ 4551 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro); 4552 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 4553 4554#ifdef SCTP_DEBUG 4555 /* Copy to be sure something bad is not happening */ 4556 sin6->sin6_addr = ip6h->ip6_dst; 4557 lsa6->sin6_addr = ip6h->ip6_src; 4558#endif 4559 4560 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n"); 4561 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: "); 4562 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6); 4563 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: "); 4564 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6); 4565 if (net) { 4566 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4567 /* 4568 * preserve the port and scope for link 4569 * local send 4570 */ 4571 prev_scope = sin6->sin6_scope_id; 4572 prev_port = sin6->sin6_port; 4573 } 4574 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 4575 /* failed to prepend data, give up */ 4576 sctp_m_freem(m); 4577 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4578 return (ENOMEM); 4579 } 4580 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 4581 if (port) { 4582#if defined(SCTP_WITH_NO_CSUM) 4583 SCTP_STAT_INCR(sctps_sendnocrc); 4584#else 4585 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 4586 SCTP_STAT_INCR(sctps_sendswcrc); 4587#endif 4588 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) { 4589 udp->uh_sum = 0xffff; 4590 } 4591 } else { 4592#if defined(SCTP_WITH_NO_CSUM) 4593 SCTP_STAT_INCR(sctps_sendnocrc); 4594#else 4595 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6; 4596 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 4597 SCTP_STAT_INCR(sctps_sendhwcrc); 4598#endif 4599 } 4600 /* send it out. table id is taken from stcb */ 4601#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4602 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4603 so = SCTP_INP_SO(inp); 4604 SCTP_SOCKET_UNLOCK(so, 0); 4605 } 4606#endif 4607#ifdef SCTP_PACKET_LOGGING 4608 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 4609 sctp_packet_log(o_pak); 4610#endif 4611 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id); 4612#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4613 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4614 atomic_add_int(&stcb->asoc.refcnt, 1); 4615 SCTP_TCB_UNLOCK(stcb); 4616 SCTP_SOCKET_LOCK(so, 0); 4617 SCTP_TCB_LOCK(stcb); 4618 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4619 } 4620#endif 4621 if (net) { 4622 /* for link local this must be done */ 4623 sin6->sin6_scope_id = prev_scope; 4624 sin6->sin6_port = prev_port; 4625 } 4626 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret); 4627 SCTP_STAT_INCR(sctps_sendpackets); 4628 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 4629 if (ret) { 4630 SCTP_STAT_INCR(sctps_senderrors); 4631 } 4632 if (net == NULL) { 4633 /* Now if we had a temp route free it */ 4634 RO_RTFREE(ro); 4635 } else { 4636 /* 4637 * PMTU check versus smallest asoc MTU goes 4638 * here 4639 */ 4640 if (ro->ro_rt == NULL) { 4641 /* Route was freed */ 4642 if (net->ro._s_addr && 4643 net->src_addr_selected) { 4644 sctp_free_ifa(net->ro._s_addr); 4645 net->ro._s_addr = NULL; 4646 } 4647 net->src_addr_selected = 0; 4648 } 4649 if ((ro->ro_rt != NULL) && 4650 (net->ro._s_addr)) { 4651 uint32_t mtu; 4652 4653 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); 4654 if (mtu && 4655 (stcb->asoc.smallest_mtu > mtu)) { 4656 sctp_mtu_size_reset(inp, &stcb->asoc, mtu); 4657 net->mtu = mtu; 4658 if (net->port) { 4659 net->mtu -= sizeof(struct udphdr); 4660 } 4661 } 4662 } else if (ifp) { 4663 if (ND_IFINFO(ifp)->linkmtu && 4664 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) { 4665 sctp_mtu_size_reset(inp, 4666 &stcb->asoc, 4667 ND_IFINFO(ifp)->linkmtu); 4668 } 4669 } 4670 } 4671 return (ret); 4672 } 4673#endif 4674 default: 4675 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n", 4676 ((struct sockaddr *)to)->sa_family); 4677 sctp_m_freem(m); 4678 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 4679 return (EFAULT); 4680 } 4681} 4682 4683 4684void 4685sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked 4686#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 4687 SCTP_UNUSED 4688#endif 4689) 4690{ 4691 struct mbuf *m, *m_last; 4692 struct sctp_nets *net; 4693 struct sctp_init_chunk *init; 4694 struct sctp_supported_addr_param *sup_addr; 4695 struct sctp_adaptation_layer_indication *ali; 4696 struct sctp_supported_chunk_types_param *pr_supported; 4697 struct sctp_paramhdr *ph; 4698 int cnt_inits_to = 0; 4699 int ret; 4700 uint16_t num_ext, chunk_len, padding_len, parameter_len; 4701 4702 /* INIT's always go to the primary (and usually ONLY address) */ 4703 net = stcb->asoc.primary_destination; 4704 if (net == NULL) { 4705 net = TAILQ_FIRST(&stcb->asoc.nets); 4706 if (net == NULL) { 4707 /* TSNH */ 4708 return; 4709 } 4710 /* we confirm any address we send an INIT to */ 4711 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 4712 (void)sctp_set_primary_addr(stcb, NULL, net); 4713 } else { 4714 /* we confirm any address we send an INIT to */ 4715 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 4716 } 4717 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n"); 4718#ifdef INET6 4719 if (net->ro._l_addr.sa.sa_family == AF_INET6) { 4720 /* 4721 * special hook, if we are sending to link local it will not 4722 * show up in our private address count. 4723 */ 4724 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr)) 4725 cnt_inits_to = 1; 4726 } 4727#endif 4728 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 4729 /* This case should not happen */ 4730 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n"); 4731 return; 4732 } 4733 /* start the INIT timer */ 4734 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net); 4735 4736 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA); 4737 if (m == NULL) { 4738 /* No memory, INIT timer will re-attempt. */ 4739 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n"); 4740 return; 4741 } 4742 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk); 4743 padding_len = 0; 4744 /* Now lets put the chunk header in place */ 4745 init = mtod(m, struct sctp_init_chunk *); 4746 /* now the chunk header */ 4747 init->ch.chunk_type = SCTP_INITIATION; 4748 init->ch.chunk_flags = 0; 4749 /* fill in later from mbuf we build */ 4750 init->ch.chunk_length = 0; 4751 /* place in my tag */ 4752 init->init.initiate_tag = htonl(stcb->asoc.my_vtag); 4753 /* set up some of the credits. */ 4754 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0, 4755 SCTP_MINIMAL_RWND)); 4756 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams); 4757 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams); 4758 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number); 4759 4760 /* Adaptation layer indication parameter */ 4761 if (inp->sctp_ep.adaptation_layer_indicator_provided) { 4762 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication); 4763 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len); 4764 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 4765 ali->ph.param_length = htons(parameter_len); 4766 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator); 4767 chunk_len += parameter_len; 4768 } 4769 /* ECN parameter */ 4770 if (stcb->asoc.ecn_supported == 1) { 4771 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4772 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4773 ph->param_type = htons(SCTP_ECN_CAPABLE); 4774 ph->param_length = htons(parameter_len); 4775 chunk_len += parameter_len; 4776 } 4777 /* PR-SCTP supported parameter */ 4778 if (stcb->asoc.prsctp_supported == 1) { 4779 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4780 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4781 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED); 4782 ph->param_length = htons(parameter_len); 4783 chunk_len += parameter_len; 4784 } 4785 /* Add NAT friendly parameter. */ 4786 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) { 4787 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4788 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4789 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); 4790 ph->param_length = htons(parameter_len); 4791 chunk_len += parameter_len; 4792 } 4793 /* And now tell the peer which extensions we support */ 4794 num_ext = 0; 4795 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len); 4796 if (stcb->asoc.prsctp_supported == 1) { 4797 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 4798 } 4799 if (stcb->asoc.auth_supported == 1) { 4800 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 4801 } 4802 if (stcb->asoc.asconf_supported == 1) { 4803 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 4804 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 4805 } 4806 if (stcb->asoc.reconfig_supported == 1) { 4807 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 4808 } 4809 if (stcb->asoc.nrsack_supported == 1) { 4810 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; 4811 } 4812 if (stcb->asoc.pktdrop_supported == 1) { 4813 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 4814 } 4815 if (num_ext > 0) { 4816 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext; 4817 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 4818 pr_supported->ph.param_length = htons(parameter_len); 4819 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4820 chunk_len += parameter_len; 4821 } 4822 /* add authentication parameters */ 4823 if (stcb->asoc.auth_supported) { 4824 /* attach RANDOM parameter, if available */ 4825 if (stcb->asoc.authinfo.random != NULL) { 4826 struct sctp_auth_random *randp; 4827 4828 if (padding_len > 0) { 4829 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4830 chunk_len += padding_len; 4831 padding_len = 0; 4832 } 4833 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len); 4834 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len; 4835 /* random key already contains the header */ 4836 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len); 4837 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4838 chunk_len += parameter_len; 4839 } 4840 /* add HMAC_ALGO parameter */ 4841 if (stcb->asoc.local_hmacs != NULL) { 4842 struct sctp_auth_hmac_algo *hmacs; 4843 4844 if (padding_len > 0) { 4845 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4846 chunk_len += padding_len; 4847 padding_len = 0; 4848 } 4849 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len); 4850 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) + 4851 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t)); 4852 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 4853 hmacs->ph.param_length = htons(parameter_len); 4854 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids); 4855 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4856 chunk_len += parameter_len; 4857 } 4858 /* add CHUNKS parameter */ 4859 if (stcb->asoc.local_auth_chunks != NULL) { 4860 struct sctp_auth_chunk_list *chunks; 4861 4862 if (padding_len > 0) { 4863 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4864 chunk_len += padding_len; 4865 padding_len = 0; 4866 } 4867 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len); 4868 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) + 4869 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks)); 4870 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 4871 chunks->ph.param_length = htons(parameter_len); 4872 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types); 4873 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4874 chunk_len += parameter_len; 4875 } 4876 } 4877 /* now any cookie time extensions */ 4878 if (stcb->asoc.cookie_preserve_req) { 4879 struct sctp_cookie_perserve_param *cookie_preserve; 4880 4881 if (padding_len > 0) { 4882 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4883 chunk_len += padding_len; 4884 padding_len = 0; 4885 } 4886 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param); 4887 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len); 4888 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE); 4889 cookie_preserve->ph.param_length = htons(parameter_len); 4890 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req); 4891 stcb->asoc.cookie_preserve_req = 0; 4892 chunk_len += parameter_len; 4893 } 4894 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) { 4895 uint8_t i; 4896 4897 if (padding_len > 0) { 4898 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4899 chunk_len += padding_len; 4900 padding_len = 0; 4901 } 4902 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4903 if (stcb->asoc.scope.ipv4_addr_legal) { 4904 parameter_len += (uint16_t) sizeof(uint16_t); 4905 } 4906 if (stcb->asoc.scope.ipv6_addr_legal) { 4907 parameter_len += (uint16_t) sizeof(uint16_t); 4908 } 4909 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len); 4910 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE); 4911 sup_addr->ph.param_length = htons(parameter_len); 4912 i = 0; 4913 if (stcb->asoc.scope.ipv4_addr_legal) { 4914 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS); 4915 } 4916 if (stcb->asoc.scope.ipv6_addr_legal) { 4917 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS); 4918 } 4919 padding_len = 4 - 2 * i; 4920 chunk_len += parameter_len; 4921 } 4922 SCTP_BUF_LEN(m) = chunk_len; 4923 /* now the addresses */ 4924 /* 4925 * To optimize this we could put the scoping stuff into a structure 4926 * and remove the individual uint8's from the assoc structure. Then 4927 * we could just sifa in the address within the stcb. But for now 4928 * this is a quick hack to get the address stuff teased apart. 4929 */ 4930 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope, 4931 m, cnt_inits_to, 4932 &padding_len, &chunk_len); 4933 4934 init->ch.chunk_length = htons(chunk_len); 4935 if (padding_len > 0) { 4936 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 4937 sctp_m_freem(m); 4938 return; 4939 } 4940 } 4941 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n"); 4942 ret = sctp_lowlevel_chunk_output(inp, stcb, net, 4943 (struct sockaddr *)&net->ro._l_addr, 4944 m, 0, NULL, 0, 0, 0, 0, 4945 inp->sctp_lport, stcb->rport, htonl(0), 4946 net->port, NULL, 4947 0, 0, 4948 so_locked); 4949 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret); 4950 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 4951 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 4952} 4953 4954struct mbuf * 4955sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt, 4956 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly) 4957{ 4958 /* 4959 * Given a mbuf containing an INIT or INIT-ACK with the param_offset 4960 * being equal to the beginning of the params i.e. (iphlen + 4961 * sizeof(struct sctp_init_msg) parse through the parameters to the 4962 * end of the mbuf verifying that all parameters are known. 4963 * 4964 * For unknown parameters build and return a mbuf with 4965 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop 4966 * processing this chunk stop, and set *abort_processing to 1. 4967 * 4968 * By having param_offset be pre-set to where parameters begin it is 4969 * hoped that this routine may be reused in the future by new 4970 * features. 4971 */ 4972 struct sctp_paramhdr *phdr, params; 4973 4974 struct mbuf *mat, *op_err; 4975 char tempbuf[SCTP_PARAM_BUFFER_SIZE]; 4976 int at, limit, pad_needed; 4977 uint16_t ptype, plen, padded_size; 4978 int err_at; 4979 4980 *abort_processing = 0; 4981 mat = in_initpkt; 4982 err_at = 0; 4983 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk); 4984 at = param_offset; 4985 op_err = NULL; 4986 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n"); 4987 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 4988 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) { 4989 ptype = ntohs(phdr->param_type); 4990 plen = ntohs(phdr->param_length); 4991 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) { 4992 /* wacked parameter */ 4993 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen); 4994 goto invalid_size; 4995 } 4996 limit -= SCTP_SIZE32(plen); 4997 /*- 4998 * All parameters for all chunks that we know/understand are 4999 * listed here. We process them other places and make 5000 * appropriate stop actions per the upper bits. However this 5001 * is the generic routine processor's can call to get back 5002 * an operr.. to either incorporate (init-ack) or send. 5003 */ 5004 padded_size = SCTP_SIZE32(plen); 5005 switch (ptype) { 5006 /* Param's with variable size */ 5007 case SCTP_HEARTBEAT_INFO: 5008 case SCTP_STATE_COOKIE: 5009 case SCTP_UNRECOG_PARAM: 5010 case SCTP_ERROR_CAUSE_IND: 5011 /* ok skip fwd */ 5012 at += padded_size; 5013 break; 5014 /* Param's with variable size within a range */ 5015 case SCTP_CHUNK_LIST: 5016 case SCTP_SUPPORTED_CHUNK_EXT: 5017 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) { 5018 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen); 5019 goto invalid_size; 5020 } 5021 at += padded_size; 5022 break; 5023 case SCTP_SUPPORTED_ADDRTYPE: 5024 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) { 5025 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen); 5026 goto invalid_size; 5027 } 5028 at += padded_size; 5029 break; 5030 case SCTP_RANDOM: 5031 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) { 5032 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen); 5033 goto invalid_size; 5034 } 5035 at += padded_size; 5036 break; 5037 case SCTP_SET_PRIM_ADDR: 5038 case SCTP_DEL_IP_ADDRESS: 5039 case SCTP_ADD_IP_ADDRESS: 5040 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) && 5041 (padded_size != sizeof(struct sctp_asconf_addr_param))) { 5042 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen); 5043 goto invalid_size; 5044 } 5045 at += padded_size; 5046 break; 5047 /* Param's with a fixed size */ 5048 case SCTP_IPV4_ADDRESS: 5049 if (padded_size != sizeof(struct sctp_ipv4addr_param)) { 5050 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen); 5051 goto invalid_size; 5052 } 5053 at += padded_size; 5054 break; 5055 case SCTP_IPV6_ADDRESS: 5056 if (padded_size != sizeof(struct sctp_ipv6addr_param)) { 5057 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen); 5058 goto invalid_size; 5059 } 5060 at += padded_size; 5061 break; 5062 case SCTP_COOKIE_PRESERVE: 5063 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) { 5064 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen); 5065 goto invalid_size; 5066 } 5067 at += padded_size; 5068 break; 5069 case SCTP_HAS_NAT_SUPPORT: 5070 *nat_friendly = 1; 5071 /* fall through */ 5072 case SCTP_PRSCTP_SUPPORTED: 5073 if (padded_size != sizeof(struct sctp_paramhdr)) { 5074 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen); 5075 goto invalid_size; 5076 } 5077 at += padded_size; 5078 break; 5079 case SCTP_ECN_CAPABLE: 5080 if (padded_size != sizeof(struct sctp_paramhdr)) { 5081 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen); 5082 goto invalid_size; 5083 } 5084 at += padded_size; 5085 break; 5086 case SCTP_ULP_ADAPTATION: 5087 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) { 5088 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen); 5089 goto invalid_size; 5090 } 5091 at += padded_size; 5092 break; 5093 case SCTP_SUCCESS_REPORT: 5094 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) { 5095 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen); 5096 goto invalid_size; 5097 } 5098 at += padded_size; 5099 break; 5100 case SCTP_HOSTNAME_ADDRESS: 5101 { 5102 /* We can NOT handle HOST NAME addresses!! */ 5103 int l_len; 5104 5105 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n"); 5106 *abort_processing = 1; 5107 if (op_err == NULL) { 5108 /* Ok need to try to get a mbuf */ 5109#ifdef INET6 5110 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5111#else 5112 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5113#endif 5114 l_len += plen; 5115 l_len += sizeof(struct sctp_paramhdr); 5116 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5117 if (op_err) { 5118 SCTP_BUF_LEN(op_err) = 0; 5119 /* 5120 * pre-reserve space for ip 5121 * and sctp header and 5122 * chunk hdr 5123 */ 5124#ifdef INET6 5125 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5126#else 5127 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5128#endif 5129 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5130 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5131 } 5132 } 5133 if (op_err) { 5134 /* If we have space */ 5135 struct sctp_paramhdr s; 5136 5137 if (err_at % 4) { 5138 uint32_t cpthis = 0; 5139 5140 pad_needed = 4 - (err_at % 4); 5141 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5142 err_at += pad_needed; 5143 } 5144 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR); 5145 s.param_length = htons(sizeof(s) + plen); 5146 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5147 err_at += sizeof(s); 5148 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen)); 5149 if (phdr == NULL) { 5150 sctp_m_freem(op_err); 5151 /* 5152 * we are out of memory but 5153 * we still need to have a 5154 * look at what to do (the 5155 * system is in trouble 5156 * though). 5157 */ 5158 return (NULL); 5159 } 5160 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 5161 } 5162 return (op_err); 5163 break; 5164 } 5165 default: 5166 /* 5167 * we do not recognize the parameter figure out what 5168 * we do. 5169 */ 5170 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype); 5171 if ((ptype & 0x4000) == 0x4000) { 5172 /* Report bit is set?? */ 5173 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n"); 5174 if (op_err == NULL) { 5175 int l_len; 5176 5177 /* Ok need to try to get an mbuf */ 5178#ifdef INET6 5179 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5180#else 5181 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5182#endif 5183 l_len += plen; 5184 l_len += sizeof(struct sctp_paramhdr); 5185 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5186 if (op_err) { 5187 SCTP_BUF_LEN(op_err) = 0; 5188#ifdef INET6 5189 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5190#else 5191 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5192#endif 5193 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5194 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5195 } 5196 } 5197 if (op_err) { 5198 /* If we have space */ 5199 struct sctp_paramhdr s; 5200 5201 if (err_at % 4) { 5202 uint32_t cpthis = 0; 5203 5204 pad_needed = 4 - (err_at % 4); 5205 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5206 err_at += pad_needed; 5207 } 5208 s.param_type = htons(SCTP_UNRECOG_PARAM); 5209 s.param_length = htons(sizeof(s) + plen); 5210 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5211 err_at += sizeof(s); 5212 if (plen > sizeof(tempbuf)) { 5213 plen = sizeof(tempbuf); 5214 } 5215 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen)); 5216 if (phdr == NULL) { 5217 sctp_m_freem(op_err); 5218 /* 5219 * we are out of memory but 5220 * we still need to have a 5221 * look at what to do (the 5222 * system is in trouble 5223 * though). 5224 */ 5225 op_err = NULL; 5226 goto more_processing; 5227 } 5228 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 5229 err_at += plen; 5230 } 5231 } 5232 more_processing: 5233 if ((ptype & 0x8000) == 0x0000) { 5234 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n"); 5235 return (op_err); 5236 } else { 5237 /* skip this chunk and continue processing */ 5238 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n"); 5239 at += SCTP_SIZE32(plen); 5240 } 5241 break; 5242 5243 } 5244 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 5245 } 5246 return (op_err); 5247invalid_size: 5248 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n"); 5249 *abort_processing = 1; 5250 if ((op_err == NULL) && phdr) { 5251 int l_len; 5252 5253#ifdef INET6 5254 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5255#else 5256 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5257#endif 5258 l_len += (2 * sizeof(struct sctp_paramhdr)); 5259 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5260 if (op_err) { 5261 SCTP_BUF_LEN(op_err) = 0; 5262#ifdef INET6 5263 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5264#else 5265 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5266#endif 5267 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5268 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5269 } 5270 } 5271 if ((op_err) && phdr) { 5272 struct sctp_paramhdr s; 5273 5274 if (err_at % 4) { 5275 uint32_t cpthis = 0; 5276 5277 pad_needed = 4 - (err_at % 4); 5278 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5279 err_at += pad_needed; 5280 } 5281 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); 5282 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr)); 5283 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5284 err_at += sizeof(s); 5285 /* Only copy back the p-hdr that caused the issue */ 5286 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr); 5287 } 5288 return (op_err); 5289} 5290 5291static int 5292sctp_are_there_new_addresses(struct sctp_association *asoc, 5293 struct mbuf *in_initpkt, int offset, struct sockaddr *src) 5294{ 5295 /* 5296 * Given a INIT packet, look through the packet to verify that there 5297 * are NO new addresses. As we go through the parameters add reports 5298 * of any un-understood parameters that require an error. Also we 5299 * must return (1) to drop the packet if we see a un-understood 5300 * parameter that tells us to drop the chunk. 5301 */ 5302 struct sockaddr *sa_touse; 5303 struct sockaddr *sa; 5304 struct sctp_paramhdr *phdr, params; 5305 uint16_t ptype, plen; 5306 uint8_t fnd; 5307 struct sctp_nets *net; 5308 5309#ifdef INET 5310 struct sockaddr_in sin4, *sa4; 5311 5312#endif 5313#ifdef INET6 5314 struct sockaddr_in6 sin6, *sa6; 5315 5316#endif 5317 5318#ifdef INET 5319 memset(&sin4, 0, sizeof(sin4)); 5320 sin4.sin_family = AF_INET; 5321 sin4.sin_len = sizeof(sin4); 5322#endif 5323#ifdef INET6 5324 memset(&sin6, 0, sizeof(sin6)); 5325 sin6.sin6_family = AF_INET6; 5326 sin6.sin6_len = sizeof(sin6); 5327#endif 5328 /* First what about the src address of the pkt ? */ 5329 fnd = 0; 5330 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5331 sa = (struct sockaddr *)&net->ro._l_addr; 5332 if (sa->sa_family == src->sa_family) { 5333#ifdef INET 5334 if (sa->sa_family == AF_INET) { 5335 struct sockaddr_in *src4; 5336 5337 sa4 = (struct sockaddr_in *)sa; 5338 src4 = (struct sockaddr_in *)src; 5339 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) { 5340 fnd = 1; 5341 break; 5342 } 5343 } 5344#endif 5345#ifdef INET6 5346 if (sa->sa_family == AF_INET6) { 5347 struct sockaddr_in6 *src6; 5348 5349 sa6 = (struct sockaddr_in6 *)sa; 5350 src6 = (struct sockaddr_in6 *)src; 5351 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) { 5352 fnd = 1; 5353 break; 5354 } 5355 } 5356#endif 5357 } 5358 } 5359 if (fnd == 0) { 5360 /* New address added! no need to look futher. */ 5361 return (1); 5362 } 5363 /* Ok so far lets munge through the rest of the packet */ 5364 offset += sizeof(struct sctp_init_chunk); 5365 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); 5366 while (phdr) { 5367 sa_touse = NULL; 5368 ptype = ntohs(phdr->param_type); 5369 plen = ntohs(phdr->param_length); 5370 switch (ptype) { 5371#ifdef INET 5372 case SCTP_IPV4_ADDRESS: 5373 { 5374 struct sctp_ipv4addr_param *p4, p4_buf; 5375 5376 phdr = sctp_get_next_param(in_initpkt, offset, 5377 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 5378 if (plen != sizeof(struct sctp_ipv4addr_param) || 5379 phdr == NULL) { 5380 return (1); 5381 } 5382 p4 = (struct sctp_ipv4addr_param *)phdr; 5383 sin4.sin_addr.s_addr = p4->addr; 5384 sa_touse = (struct sockaddr *)&sin4; 5385 break; 5386 } 5387#endif 5388#ifdef INET6 5389 case SCTP_IPV6_ADDRESS: 5390 { 5391 struct sctp_ipv6addr_param *p6, p6_buf; 5392 5393 phdr = sctp_get_next_param(in_initpkt, offset, 5394 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 5395 if (plen != sizeof(struct sctp_ipv6addr_param) || 5396 phdr == NULL) { 5397 return (1); 5398 } 5399 p6 = (struct sctp_ipv6addr_param *)phdr; 5400 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 5401 sizeof(p6->addr)); 5402 sa_touse = (struct sockaddr *)&sin6; 5403 break; 5404 } 5405#endif 5406 default: 5407 sa_touse = NULL; 5408 break; 5409 } 5410 if (sa_touse) { 5411 /* ok, sa_touse points to one to check */ 5412 fnd = 0; 5413 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5414 sa = (struct sockaddr *)&net->ro._l_addr; 5415 if (sa->sa_family != sa_touse->sa_family) { 5416 continue; 5417 } 5418#ifdef INET 5419 if (sa->sa_family == AF_INET) { 5420 sa4 = (struct sockaddr_in *)sa; 5421 if (sa4->sin_addr.s_addr == 5422 sin4.sin_addr.s_addr) { 5423 fnd = 1; 5424 break; 5425 } 5426 } 5427#endif 5428#ifdef INET6 5429 if (sa->sa_family == AF_INET6) { 5430 sa6 = (struct sockaddr_in6 *)sa; 5431 if (SCTP6_ARE_ADDR_EQUAL( 5432 sa6, &sin6)) { 5433 fnd = 1; 5434 break; 5435 } 5436 } 5437#endif 5438 } 5439 if (!fnd) { 5440 /* New addr added! no need to look further */ 5441 return (1); 5442 } 5443 } 5444 offset += SCTP_SIZE32(plen); 5445 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); 5446 } 5447 return (0); 5448} 5449 5450/* 5451 * Given a MBUF chain that was sent into us containing an INIT. Build a 5452 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done 5453 * a pullup to include IPv6/4header, SCTP header and initial part of INIT 5454 * message (i.e. the struct sctp_init_msg). 5455 */ 5456void 5457sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 5458 struct mbuf *init_pkt, int iphlen, int offset, 5459 struct sockaddr *src, struct sockaddr *dst, 5460 struct sctphdr *sh, struct sctp_init_chunk *init_chk, 5461 uint8_t mflowtype, uint32_t mflowid, 5462 uint32_t vrf_id, uint16_t port, int hold_inp_lock) 5463{ 5464 struct sctp_association *asoc; 5465 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err; 5466 struct sctp_init_ack_chunk *initack; 5467 struct sctp_adaptation_layer_indication *ali; 5468 struct sctp_supported_chunk_types_param *pr_supported; 5469 struct sctp_paramhdr *ph; 5470 union sctp_sockstore *over_addr; 5471 struct sctp_scoping scp; 5472 5473#ifdef INET 5474 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst; 5475 struct sockaddr_in *src4 = (struct sockaddr_in *)src; 5476 struct sockaddr_in *sin; 5477 5478#endif 5479#ifdef INET6 5480 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst; 5481 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src; 5482 struct sockaddr_in6 *sin6; 5483 5484#endif 5485 struct sockaddr *to; 5486 struct sctp_state_cookie stc; 5487 struct sctp_nets *net = NULL; 5488 uint8_t *signature = NULL; 5489 int cnt_inits_to = 0; 5490 uint16_t his_limit, i_want; 5491 int abort_flag; 5492 int nat_friendly = 0; 5493 struct socket *so; 5494 uint16_t num_ext, chunk_len, padding_len, parameter_len; 5495 5496 if (stcb) { 5497 asoc = &stcb->asoc; 5498 } else { 5499 asoc = NULL; 5500 } 5501 if ((asoc != NULL) && 5502 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 5503 (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) { 5504 /* new addresses, out of here in non-cookie-wait states */ 5505 /* 5506 * Send a ABORT, we don't add the new address error clause 5507 * though we even set the T bit and copy in the 0 tag.. this 5508 * looks no different than if no listener was present. 5509 */ 5510 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 5511 "Address added"); 5512 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err, 5513 mflowtype, mflowid, 5514 vrf_id, port); 5515 return; 5516 } 5517 abort_flag = 0; 5518 op_err = sctp_arethere_unrecognized_parameters(init_pkt, 5519 (offset + sizeof(struct sctp_init_chunk)), 5520 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly); 5521 if (abort_flag) { 5522do_a_abort: 5523 if (op_err == NULL) { 5524 char msg[SCTP_DIAG_INFO_LEN]; 5525 5526 snprintf(msg, sizeof(msg), "%s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__); 5527 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 5528 msg); 5529 } 5530 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 5531 init_chk->init.initiate_tag, op_err, 5532 mflowtype, mflowid, 5533 vrf_id, port); 5534 return; 5535 } 5536 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 5537 if (m == NULL) { 5538 /* No memory, INIT timer will re-attempt. */ 5539 if (op_err) 5540 sctp_m_freem(op_err); 5541 return; 5542 } 5543 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk); 5544 padding_len = 0; 5545 5546 /* 5547 * We might not overwrite the identification[] completely and on 5548 * some platforms time_entered will contain some padding. Therefore 5549 * zero out the cookie to avoid putting uninitialized memory on the 5550 * wire. 5551 */ 5552 memset(&stc, 0, sizeof(struct sctp_state_cookie)); 5553 5554 /* the time I built cookie */ 5555 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered); 5556 5557 /* populate any tie tags */ 5558 if (asoc != NULL) { 5559 /* unlock before tag selections */ 5560 stc.tie_tag_my_vtag = asoc->my_vtag_nonce; 5561 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce; 5562 stc.cookie_life = asoc->cookie_life; 5563 net = asoc->primary_destination; 5564 } else { 5565 stc.tie_tag_my_vtag = 0; 5566 stc.tie_tag_peer_vtag = 0; 5567 /* life I will award this cookie */ 5568 stc.cookie_life = inp->sctp_ep.def_cookie_life; 5569 } 5570 5571 /* copy in the ports for later check */ 5572 stc.myport = sh->dest_port; 5573 stc.peerport = sh->src_port; 5574 5575 /* 5576 * If we wanted to honor cookie life extentions, we would add to 5577 * stc.cookie_life. For now we should NOT honor any extension 5578 */ 5579 stc.site_scope = stc.local_scope = stc.loopback_scope = 0; 5580 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 5581 stc.ipv6_addr_legal = 1; 5582 if (SCTP_IPV6_V6ONLY(inp)) { 5583 stc.ipv4_addr_legal = 0; 5584 } else { 5585 stc.ipv4_addr_legal = 1; 5586 } 5587 } else { 5588 stc.ipv6_addr_legal = 0; 5589 stc.ipv4_addr_legal = 1; 5590 } 5591#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 5592 stc.ipv4_scope = 1; 5593#else 5594 stc.ipv4_scope = 0; 5595#endif 5596 if (net == NULL) { 5597 to = src; 5598 switch (dst->sa_family) { 5599#ifdef INET 5600 case AF_INET: 5601 { 5602 /* lookup address */ 5603 stc.address[0] = src4->sin_addr.s_addr; 5604 stc.address[1] = 0; 5605 stc.address[2] = 0; 5606 stc.address[3] = 0; 5607 stc.addr_type = SCTP_IPV4_ADDRESS; 5608 /* local from address */ 5609 stc.laddress[0] = dst4->sin_addr.s_addr; 5610 stc.laddress[1] = 0; 5611 stc.laddress[2] = 0; 5612 stc.laddress[3] = 0; 5613 stc.laddr_type = SCTP_IPV4_ADDRESS; 5614 /* scope_id is only for v6 */ 5615 stc.scope_id = 0; 5616#ifndef SCTP_DONT_DO_PRIVADDR_SCOPE 5617 if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) { 5618 stc.ipv4_scope = 1; 5619 } 5620#else 5621 stc.ipv4_scope = 1; 5622#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 5623 /* Must use the address in this case */ 5624 if (sctp_is_address_on_local_host(src, vrf_id)) { 5625 stc.loopback_scope = 1; 5626 stc.ipv4_scope = 1; 5627 stc.site_scope = 1; 5628 stc.local_scope = 0; 5629 } 5630 break; 5631 } 5632#endif 5633#ifdef INET6 5634 case AF_INET6: 5635 { 5636 stc.addr_type = SCTP_IPV6_ADDRESS; 5637 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr)); 5638 stc.scope_id = in6_getscope(&src6->sin6_addr); 5639 if (sctp_is_address_on_local_host(src, vrf_id)) { 5640 stc.loopback_scope = 1; 5641 stc.local_scope = 0; 5642 stc.site_scope = 1; 5643 stc.ipv4_scope = 1; 5644 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) { 5645 /* 5646 * If the new destination is a 5647 * LINK_LOCAL we must have common 5648 * both site and local scope. Don't 5649 * set local scope though since we 5650 * must depend on the source to be 5651 * added implicitly. We cannot 5652 * assure just because we share one 5653 * link that all links are common. 5654 */ 5655 stc.local_scope = 0; 5656 stc.site_scope = 1; 5657 stc.ipv4_scope = 1; 5658 /* 5659 * we start counting for the private 5660 * address stuff at 1. since the 5661 * link local we source from won't 5662 * show up in our scoped count. 5663 */ 5664 cnt_inits_to = 1; 5665 /* 5666 * pull out the scope_id from 5667 * incoming pkt 5668 */ 5669 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) { 5670 /* 5671 * If the new destination is 5672 * SITE_LOCAL then we must have site 5673 * scope in common. 5674 */ 5675 stc.site_scope = 1; 5676 } 5677 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr)); 5678 stc.laddr_type = SCTP_IPV6_ADDRESS; 5679 break; 5680 } 5681#endif 5682 default: 5683 /* TSNH */ 5684 goto do_a_abort; 5685 break; 5686 } 5687 } else { 5688 /* set the scope per the existing tcb */ 5689 5690#ifdef INET6 5691 struct sctp_nets *lnet; 5692 5693#endif 5694 5695 stc.loopback_scope = asoc->scope.loopback_scope; 5696 stc.ipv4_scope = asoc->scope.ipv4_local_scope; 5697 stc.site_scope = asoc->scope.site_scope; 5698 stc.local_scope = asoc->scope.local_scope; 5699#ifdef INET6 5700 /* Why do we not consider IPv4 LL addresses? */ 5701 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { 5702 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) { 5703 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) { 5704 /* 5705 * if we have a LL address, start 5706 * counting at 1. 5707 */ 5708 cnt_inits_to = 1; 5709 } 5710 } 5711 } 5712#endif 5713 /* use the net pointer */ 5714 to = (struct sockaddr *)&net->ro._l_addr; 5715 switch (to->sa_family) { 5716#ifdef INET 5717 case AF_INET: 5718 sin = (struct sockaddr_in *)to; 5719 stc.address[0] = sin->sin_addr.s_addr; 5720 stc.address[1] = 0; 5721 stc.address[2] = 0; 5722 stc.address[3] = 0; 5723 stc.addr_type = SCTP_IPV4_ADDRESS; 5724 if (net->src_addr_selected == 0) { 5725 /* 5726 * strange case here, the INIT should have 5727 * did the selection. 5728 */ 5729 net->ro._s_addr = sctp_source_address_selection(inp, 5730 stcb, (sctp_route_t *) & net->ro, 5731 net, 0, vrf_id); 5732 if (net->ro._s_addr == NULL) 5733 return; 5734 5735 net->src_addr_selected = 1; 5736 5737 } 5738 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr; 5739 stc.laddress[1] = 0; 5740 stc.laddress[2] = 0; 5741 stc.laddress[3] = 0; 5742 stc.laddr_type = SCTP_IPV4_ADDRESS; 5743 /* scope_id is only for v6 */ 5744 stc.scope_id = 0; 5745 break; 5746#endif 5747#ifdef INET6 5748 case AF_INET6: 5749 sin6 = (struct sockaddr_in6 *)to; 5750 memcpy(&stc.address, &sin6->sin6_addr, 5751 sizeof(struct in6_addr)); 5752 stc.addr_type = SCTP_IPV6_ADDRESS; 5753 stc.scope_id = sin6->sin6_scope_id; 5754 if (net->src_addr_selected == 0) { 5755 /* 5756 * strange case here, the INIT should have 5757 * done the selection. 5758 */ 5759 net->ro._s_addr = sctp_source_address_selection(inp, 5760 stcb, (sctp_route_t *) & net->ro, 5761 net, 0, vrf_id); 5762 if (net->ro._s_addr == NULL) 5763 return; 5764 5765 net->src_addr_selected = 1; 5766 } 5767 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr, 5768 sizeof(struct in6_addr)); 5769 stc.laddr_type = SCTP_IPV6_ADDRESS; 5770 break; 5771#endif 5772 } 5773 } 5774 /* Now lets put the SCTP header in place */ 5775 initack = mtod(m, struct sctp_init_ack_chunk *); 5776 /* Save it off for quick ref */ 5777 stc.peers_vtag = init_chk->init.initiate_tag; 5778 /* who are we */ 5779 memcpy(stc.identification, SCTP_VERSION_STRING, 5780 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification))); 5781 memset(stc.reserved, 0, SCTP_RESERVE_SPACE); 5782 /* now the chunk header */ 5783 initack->ch.chunk_type = SCTP_INITIATION_ACK; 5784 initack->ch.chunk_flags = 0; 5785 /* fill in later from mbuf we build */ 5786 initack->ch.chunk_length = 0; 5787 /* place in my tag */ 5788 if ((asoc != NULL) && 5789 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 5790 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) || 5791 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) { 5792 /* re-use the v-tags and init-seq here */ 5793 initack->init.initiate_tag = htonl(asoc->my_vtag); 5794 initack->init.initial_tsn = htonl(asoc->init_seq_number); 5795 } else { 5796 uint32_t vtag, itsn; 5797 5798 if (hold_inp_lock) { 5799 SCTP_INP_INCR_REF(inp); 5800 SCTP_INP_RUNLOCK(inp); 5801 } 5802 if (asoc) { 5803 atomic_add_int(&asoc->refcnt, 1); 5804 SCTP_TCB_UNLOCK(stcb); 5805 new_tag: 5806 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); 5807 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) { 5808 /* 5809 * Got a duplicate vtag on some guy behind a 5810 * nat make sure we don't use it. 5811 */ 5812 goto new_tag; 5813 } 5814 initack->init.initiate_tag = htonl(vtag); 5815 /* get a TSN to use too */ 5816 itsn = sctp_select_initial_TSN(&inp->sctp_ep); 5817 initack->init.initial_tsn = htonl(itsn); 5818 SCTP_TCB_LOCK(stcb); 5819 atomic_add_int(&asoc->refcnt, -1); 5820 } else { 5821 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); 5822 initack->init.initiate_tag = htonl(vtag); 5823 /* get a TSN to use too */ 5824 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep)); 5825 } 5826 if (hold_inp_lock) { 5827 SCTP_INP_RLOCK(inp); 5828 SCTP_INP_DECR_REF(inp); 5829 } 5830 } 5831 /* save away my tag to */ 5832 stc.my_vtag = initack->init.initiate_tag; 5833 5834 /* set up some of the credits. */ 5835 so = inp->sctp_socket; 5836 if (so == NULL) { 5837 /* memory problem */ 5838 sctp_m_freem(m); 5839 return; 5840 } else { 5841 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND)); 5842 } 5843 /* set what I want */ 5844 his_limit = ntohs(init_chk->init.num_inbound_streams); 5845 /* choose what I want */ 5846 if (asoc != NULL) { 5847 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) { 5848 i_want = asoc->streamoutcnt; 5849 } else { 5850 i_want = inp->sctp_ep.pre_open_stream_count; 5851 } 5852 } else { 5853 i_want = inp->sctp_ep.pre_open_stream_count; 5854 } 5855 if (his_limit < i_want) { 5856 /* I Want more :< */ 5857 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams; 5858 } else { 5859 /* I can have what I want :> */ 5860 initack->init.num_outbound_streams = htons(i_want); 5861 } 5862 /* tell him his limit. */ 5863 initack->init.num_inbound_streams = 5864 htons(inp->sctp_ep.max_open_streams_intome); 5865 5866 /* adaptation layer indication parameter */ 5867 if (inp->sctp_ep.adaptation_layer_indicator_provided) { 5868 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication); 5869 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len); 5870 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 5871 ali->ph.param_length = htons(parameter_len); 5872 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator); 5873 chunk_len += parameter_len; 5874 } 5875 /* ECN parameter */ 5876 if (((asoc != NULL) && (asoc->ecn_supported == 1)) || 5877 ((asoc == NULL) && (inp->ecn_supported == 1))) { 5878 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5879 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5880 ph->param_type = htons(SCTP_ECN_CAPABLE); 5881 ph->param_length = htons(parameter_len); 5882 chunk_len += parameter_len; 5883 } 5884 /* PR-SCTP supported parameter */ 5885 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) || 5886 ((asoc == NULL) && (inp->prsctp_supported == 1))) { 5887 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5888 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5889 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED); 5890 ph->param_length = htons(parameter_len); 5891 chunk_len += parameter_len; 5892 } 5893 /* Add NAT friendly parameter */ 5894 if (nat_friendly) { 5895 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5896 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5897 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); 5898 ph->param_length = htons(parameter_len); 5899 chunk_len += parameter_len; 5900 } 5901 /* And now tell the peer which extensions we support */ 5902 num_ext = 0; 5903 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len); 5904 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) || 5905 ((asoc == NULL) && (inp->prsctp_supported == 1))) { 5906 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 5907 } 5908 if (((asoc != NULL) && (asoc->auth_supported == 1)) || 5909 ((asoc == NULL) && (inp->auth_supported == 1))) { 5910 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 5911 } 5912 if (((asoc != NULL) && (asoc->asconf_supported == 1)) || 5913 ((asoc == NULL) && (inp->asconf_supported == 1))) { 5914 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 5915 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 5916 } 5917 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) || 5918 ((asoc == NULL) && (inp->reconfig_supported == 1))) { 5919 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 5920 } 5921 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) || 5922 ((asoc == NULL) && (inp->nrsack_supported == 1))) { 5923 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; 5924 } 5925 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) || 5926 ((asoc == NULL) && (inp->pktdrop_supported == 1))) { 5927 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 5928 } 5929 if (num_ext > 0) { 5930 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext; 5931 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 5932 pr_supported->ph.param_length = htons(parameter_len); 5933 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5934 chunk_len += parameter_len; 5935 } 5936 /* add authentication parameters */ 5937 if (((asoc != NULL) && (asoc->auth_supported == 1)) || 5938 ((asoc == NULL) && (inp->auth_supported == 1))) { 5939 struct sctp_auth_random *randp; 5940 struct sctp_auth_hmac_algo *hmacs; 5941 struct sctp_auth_chunk_list *chunks; 5942 5943 if (padding_len > 0) { 5944 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 5945 chunk_len += padding_len; 5946 padding_len = 0; 5947 } 5948 /* generate and add RANDOM parameter */ 5949 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len); 5950 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + 5951 SCTP_AUTH_RANDOM_SIZE_DEFAULT; 5952 randp->ph.param_type = htons(SCTP_RANDOM); 5953 randp->ph.param_length = htons(parameter_len); 5954 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT); 5955 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5956 chunk_len += parameter_len; 5957 5958 if (padding_len > 0) { 5959 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 5960 chunk_len += padding_len; 5961 padding_len = 0; 5962 } 5963 /* add HMAC_ALGO parameter */ 5964 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len); 5965 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) + 5966 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs, 5967 (uint8_t *) hmacs->hmac_ids); 5968 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 5969 hmacs->ph.param_length = htons(parameter_len); 5970 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5971 chunk_len += parameter_len; 5972 5973 if (padding_len > 0) { 5974 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 5975 chunk_len += padding_len; 5976 padding_len = 0; 5977 } 5978 /* add CHUNKS parameter */ 5979 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len); 5980 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) + 5981 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks, 5982 chunks->chunk_types); 5983 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 5984 chunks->ph.param_length = htons(parameter_len); 5985 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5986 chunk_len += parameter_len; 5987 } 5988 SCTP_BUF_LEN(m) = chunk_len; 5989 m_last = m; 5990 /* now the addresses */ 5991 /* 5992 * To optimize this we could put the scoping stuff into a structure 5993 * and remove the individual uint8's from the stc structure. Then we 5994 * could just sifa in the address within the stc.. but for now this 5995 * is a quick hack to get the address stuff teased apart. 5996 */ 5997 scp.ipv4_addr_legal = stc.ipv4_addr_legal; 5998 scp.ipv6_addr_legal = stc.ipv6_addr_legal; 5999 scp.loopback_scope = stc.loopback_scope; 6000 scp.ipv4_local_scope = stc.ipv4_scope; 6001 scp.local_scope = stc.local_scope; 6002 scp.site_scope = stc.site_scope; 6003 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last, 6004 cnt_inits_to, 6005 &padding_len, &chunk_len); 6006 /* padding_len can only be positive, if no addresses have been added */ 6007 if (padding_len > 0) { 6008 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 6009 chunk_len += padding_len; 6010 SCTP_BUF_LEN(m) += padding_len; 6011 padding_len = 0; 6012 } 6013 /* tack on the operational error if present */ 6014 if (op_err) { 6015 parameter_len = 0; 6016 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 6017 parameter_len += SCTP_BUF_LEN(m_tmp); 6018 } 6019 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6020 SCTP_BUF_NEXT(m_last) = op_err; 6021 while (SCTP_BUF_NEXT(m_last) != NULL) { 6022 m_last = SCTP_BUF_NEXT(m_last); 6023 } 6024 chunk_len += parameter_len; 6025 } 6026 if (padding_len > 0) { 6027 m_last = sctp_add_pad_tombuf(m_last, padding_len); 6028 if (m_last == NULL) { 6029 /* Houston we have a problem, no space */ 6030 sctp_m_freem(m); 6031 return; 6032 } 6033 chunk_len += padding_len; 6034 padding_len = 0; 6035 } 6036 /* Now we must build a cookie */ 6037 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature); 6038 if (m_cookie == NULL) { 6039 /* memory problem */ 6040 sctp_m_freem(m); 6041 return; 6042 } 6043 /* Now append the cookie to the end and update the space/size */ 6044 SCTP_BUF_NEXT(m_last) = m_cookie; 6045 parameter_len = 0; 6046 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 6047 parameter_len += SCTP_BUF_LEN(m_tmp); 6048 if (SCTP_BUF_NEXT(m_tmp) == NULL) { 6049 m_last = m_tmp; 6050 } 6051 } 6052 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6053 chunk_len += parameter_len; 6054 6055 /* 6056 * Place in the size, but we don't include the last pad (if any) in 6057 * the INIT-ACK. 6058 */ 6059 initack->ch.chunk_length = htons(chunk_len); 6060 6061 /* 6062 * Time to sign the cookie, we don't sign over the cookie signature 6063 * though thus we set trailer. 6064 */ 6065 (void)sctp_hmac_m(SCTP_HMAC, 6066 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)], 6067 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr), 6068 (uint8_t *) signature, SCTP_SIGNATURE_SIZE); 6069 /* 6070 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return 6071 * here since the timer will drive a retranmission. 6072 */ 6073 if (padding_len > 0) { 6074 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 6075 sctp_m_freem(m); 6076 return; 6077 } 6078 } 6079 if (stc.loopback_scope) { 6080 over_addr = (union sctp_sockstore *)dst; 6081 } else { 6082 over_addr = NULL; 6083 } 6084 6085 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0, 6086 0, 0, 6087 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag, 6088 port, over_addr, 6089 mflowtype, mflowid, 6090 SCTP_SO_NOT_LOCKED); 6091 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 6092} 6093 6094 6095static void 6096sctp_prune_prsctp(struct sctp_tcb *stcb, 6097 struct sctp_association *asoc, 6098 struct sctp_sndrcvinfo *srcv, 6099 int dataout) 6100{ 6101 int freed_spc = 0; 6102 struct sctp_tmit_chunk *chk, *nchk; 6103 6104 SCTP_TCB_LOCK_ASSERT(stcb); 6105 if ((asoc->prsctp_supported) && 6106 (asoc->sent_queue_cnt_removeable > 0)) { 6107 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 6108 /* 6109 * Look for chunks marked with the PR_SCTP flag AND 6110 * the buffer space flag. If the one being sent is 6111 * equal or greater priority then purge the old one 6112 * and free some space. 6113 */ 6114 if (PR_SCTP_BUF_ENABLED(chk->flags)) { 6115 /* 6116 * This one is PR-SCTP AND buffer space 6117 * limited type 6118 */ 6119 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 6120 /* 6121 * Lower numbers equates to higher 6122 * priority so if the one we are 6123 * looking at has a larger or equal 6124 * priority we want to drop the data 6125 * and NOT retransmit it. 6126 */ 6127 if (chk->data) { 6128 /* 6129 * We release the book_size 6130 * if the mbuf is here 6131 */ 6132 int ret_spc; 6133 uint8_t sent; 6134 6135 if (chk->sent > SCTP_DATAGRAM_UNSENT) 6136 sent = 1; 6137 else 6138 sent = 0; 6139 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 6140 sent, 6141 SCTP_SO_LOCKED); 6142 freed_spc += ret_spc; 6143 if (freed_spc >= dataout) { 6144 return; 6145 } 6146 } /* if chunk was present */ 6147 } /* if of sufficent priority */ 6148 } /* if chunk has enabled */ 6149 } /* tailqforeach */ 6150 6151 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 6152 /* Here we must move to the sent queue and mark */ 6153 if (PR_SCTP_BUF_ENABLED(chk->flags)) { 6154 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 6155 if (chk->data) { 6156 /* 6157 * We release the book_size 6158 * if the mbuf is here 6159 */ 6160 int ret_spc; 6161 6162 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 6163 0, SCTP_SO_LOCKED); 6164 6165 freed_spc += ret_spc; 6166 if (freed_spc >= dataout) { 6167 return; 6168 } 6169 } /* end if chk->data */ 6170 } /* end if right class */ 6171 } /* end if chk pr-sctp */ 6172 } /* tailqforeachsafe (chk) */ 6173 } /* if enabled in asoc */ 6174} 6175 6176int 6177sctp_get_frag_point(struct sctp_tcb *stcb, 6178 struct sctp_association *asoc) 6179{ 6180 int siz, ovh; 6181 6182 /* 6183 * For endpoints that have both v6 and v4 addresses we must reserve 6184 * room for the ipv6 header, for those that are only dealing with V4 6185 * we use a larger frag point. 6186 */ 6187 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 6188 ovh = SCTP_MED_OVERHEAD; 6189 } else { 6190 ovh = SCTP_MED_V4_OVERHEAD; 6191 } 6192 6193 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu) 6194 siz = asoc->smallest_mtu - ovh; 6195 else 6196 siz = (stcb->asoc.sctp_frag_point - ovh); 6197 /* 6198 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) { 6199 */ 6200 /* A data chunk MUST fit in a cluster */ 6201 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */ 6202 /* } */ 6203 6204 /* adjust for an AUTH chunk if DATA requires auth */ 6205 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) 6206 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 6207 6208 if (siz % 4) { 6209 /* make it an even word boundary please */ 6210 siz -= (siz % 4); 6211 } 6212 return (siz); 6213} 6214 6215static void 6216sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp) 6217{ 6218 /* 6219 * We assume that the user wants PR_SCTP_TTL if the user provides a 6220 * positive lifetime but does not specify any PR_SCTP policy. 6221 */ 6222 if (PR_SCTP_ENABLED(sp->sinfo_flags)) { 6223 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); 6224 } else if (sp->timetolive > 0) { 6225 sp->sinfo_flags |= SCTP_PR_SCTP_TTL; 6226 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); 6227 } else { 6228 return; 6229 } 6230 switch (PR_SCTP_POLICY(sp->sinfo_flags)) { 6231 case CHUNK_FLAGS_PR_SCTP_BUF: 6232 /* 6233 * Time to live is a priority stored in tv_sec when doing 6234 * the buffer drop thing. 6235 */ 6236 sp->ts.tv_sec = sp->timetolive; 6237 sp->ts.tv_usec = 0; 6238 break; 6239 case CHUNK_FLAGS_PR_SCTP_TTL: 6240 { 6241 struct timeval tv; 6242 6243 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 6244 tv.tv_sec = sp->timetolive / 1000; 6245 tv.tv_usec = (sp->timetolive * 1000) % 1000000; 6246 /* 6247 * TODO sctp_constants.h needs alternative time 6248 * macros when _KERNEL is undefined. 6249 */ 6250 timevaladd(&sp->ts, &tv); 6251 } 6252 break; 6253 case CHUNK_FLAGS_PR_SCTP_RTX: 6254 /* 6255 * Time to live is a the number or retransmissions stored in 6256 * tv_sec. 6257 */ 6258 sp->ts.tv_sec = sp->timetolive; 6259 sp->ts.tv_usec = 0; 6260 break; 6261 default: 6262 SCTPDBG(SCTP_DEBUG_USRREQ1, 6263 "Unknown PR_SCTP policy %u.\n", 6264 PR_SCTP_POLICY(sp->sinfo_flags)); 6265 break; 6266 } 6267} 6268 6269static int 6270sctp_msg_append(struct sctp_tcb *stcb, 6271 struct sctp_nets *net, 6272 struct mbuf *m, 6273 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock) 6274{ 6275 int error = 0; 6276 struct mbuf *at; 6277 struct sctp_stream_queue_pending *sp = NULL; 6278 struct sctp_stream_out *strm; 6279 6280 /* 6281 * Given an mbuf chain, put it into the association send queue and 6282 * place it on the wheel 6283 */ 6284 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) { 6285 /* Invalid stream number */ 6286 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 6287 error = EINVAL; 6288 goto out_now; 6289 } 6290 if ((stcb->asoc.stream_locked) && 6291 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) { 6292 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 6293 error = EINVAL; 6294 goto out_now; 6295 } 6296 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 6297 /* Now can we send this? */ 6298 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) || 6299 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 6300 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 6301 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) { 6302 /* got data while shutting down */ 6303 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 6304 error = ECONNRESET; 6305 goto out_now; 6306 } 6307 sctp_alloc_a_strmoq(stcb, sp); 6308 if (sp == NULL) { 6309 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6310 error = ENOMEM; 6311 goto out_now; 6312 } 6313 sp->sinfo_flags = srcv->sinfo_flags; 6314 sp->timetolive = srcv->sinfo_timetolive; 6315 sp->ppid = srcv->sinfo_ppid; 6316 sp->context = srcv->sinfo_context; 6317 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 6318 sp->net = net; 6319 atomic_add_int(&sp->net->ref_count, 1); 6320 } else { 6321 sp->net = NULL; 6322 } 6323 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 6324 sp->stream = srcv->sinfo_stream; 6325 sp->msg_is_complete = 1; 6326 sp->sender_all_done = 1; 6327 sp->some_taken = 0; 6328 sp->data = m; 6329 sp->tail_mbuf = NULL; 6330 sctp_set_prsctp_policy(sp); 6331 /* 6332 * We could in theory (for sendall) sifa the length in, but we would 6333 * still have to hunt through the chain since we need to setup the 6334 * tail_mbuf 6335 */ 6336 sp->length = 0; 6337 for (at = m; at; at = SCTP_BUF_NEXT(at)) { 6338 if (SCTP_BUF_NEXT(at) == NULL) 6339 sp->tail_mbuf = at; 6340 sp->length += SCTP_BUF_LEN(at); 6341 } 6342 if (srcv->sinfo_keynumber_valid) { 6343 sp->auth_keyid = srcv->sinfo_keynumber; 6344 } else { 6345 sp->auth_keyid = stcb->asoc.authinfo.active_keyid; 6346 } 6347 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { 6348 sctp_auth_key_acquire(stcb, sp->auth_keyid); 6349 sp->holds_key_ref = 1; 6350 } 6351 if (hold_stcb_lock == 0) { 6352 SCTP_TCB_SEND_LOCK(stcb); 6353 } 6354 sctp_snd_sb_alloc(stcb, sp->length); 6355 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1); 6356 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 6357 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1); 6358 m = NULL; 6359 if (hold_stcb_lock == 0) { 6360 SCTP_TCB_SEND_UNLOCK(stcb); 6361 } 6362out_now: 6363 if (m) { 6364 sctp_m_freem(m); 6365 } 6366 return (error); 6367} 6368 6369 6370static struct mbuf * 6371sctp_copy_mbufchain(struct mbuf *clonechain, 6372 struct mbuf *outchain, 6373 struct mbuf **endofchain, 6374 int can_take_mbuf, 6375 int sizeofcpy, 6376 uint8_t copy_by_ref) 6377{ 6378 struct mbuf *m; 6379 struct mbuf *appendchain; 6380 caddr_t cp; 6381 int len; 6382 6383 if (endofchain == NULL) { 6384 /* error */ 6385error_out: 6386 if (outchain) 6387 sctp_m_freem(outchain); 6388 return (NULL); 6389 } 6390 if (can_take_mbuf) { 6391 appendchain = clonechain; 6392 } else { 6393 if (!copy_by_ref && 6394 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN))) 6395 ) { 6396 /* Its not in a cluster */ 6397 if (*endofchain == NULL) { 6398 /* lets get a mbuf cluster */ 6399 if (outchain == NULL) { 6400 /* This is the general case */ 6401 new_mbuf: 6402 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER); 6403 if (outchain == NULL) { 6404 goto error_out; 6405 } 6406 SCTP_BUF_LEN(outchain) = 0; 6407 *endofchain = outchain; 6408 /* get the prepend space */ 6409 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4)); 6410 } else { 6411 /* 6412 * We really should not get a NULL 6413 * in endofchain 6414 */ 6415 /* find end */ 6416 m = outchain; 6417 while (m) { 6418 if (SCTP_BUF_NEXT(m) == NULL) { 6419 *endofchain = m; 6420 break; 6421 } 6422 m = SCTP_BUF_NEXT(m); 6423 } 6424 /* sanity */ 6425 if (*endofchain == NULL) { 6426 /* 6427 * huh, TSNH XXX maybe we 6428 * should panic 6429 */ 6430 sctp_m_freem(outchain); 6431 goto new_mbuf; 6432 } 6433 } 6434 /* get the new end of length */ 6435 len = M_TRAILINGSPACE(*endofchain); 6436 } else { 6437 /* how much is left at the end? */ 6438 len = M_TRAILINGSPACE(*endofchain); 6439 } 6440 /* Find the end of the data, for appending */ 6441 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain))); 6442 6443 /* Now lets copy it out */ 6444 if (len >= sizeofcpy) { 6445 /* It all fits, copy it in */ 6446 m_copydata(clonechain, 0, sizeofcpy, cp); 6447 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 6448 } else { 6449 /* fill up the end of the chain */ 6450 if (len > 0) { 6451 m_copydata(clonechain, 0, len, cp); 6452 SCTP_BUF_LEN((*endofchain)) += len; 6453 /* now we need another one */ 6454 sizeofcpy -= len; 6455 } 6456 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER); 6457 if (m == NULL) { 6458 /* We failed */ 6459 goto error_out; 6460 } 6461 SCTP_BUF_NEXT((*endofchain)) = m; 6462 *endofchain = m; 6463 cp = mtod((*endofchain), caddr_t); 6464 m_copydata(clonechain, len, sizeofcpy, cp); 6465 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 6466 } 6467 return (outchain); 6468 } else { 6469 /* copy the old fashion way */ 6470 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT); 6471#ifdef SCTP_MBUF_LOGGING 6472 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 6473 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY); 6474 } 6475#endif 6476 } 6477 } 6478 if (appendchain == NULL) { 6479 /* error */ 6480 if (outchain) 6481 sctp_m_freem(outchain); 6482 return (NULL); 6483 } 6484 if (outchain) { 6485 /* tack on to the end */ 6486 if (*endofchain != NULL) { 6487 SCTP_BUF_NEXT(((*endofchain))) = appendchain; 6488 } else { 6489 m = outchain; 6490 while (m) { 6491 if (SCTP_BUF_NEXT(m) == NULL) { 6492 SCTP_BUF_NEXT(m) = appendchain; 6493 break; 6494 } 6495 m = SCTP_BUF_NEXT(m); 6496 } 6497 } 6498 /* 6499 * save off the end and update the end-chain postion 6500 */ 6501 m = appendchain; 6502 while (m) { 6503 if (SCTP_BUF_NEXT(m) == NULL) { 6504 *endofchain = m; 6505 break; 6506 } 6507 m = SCTP_BUF_NEXT(m); 6508 } 6509 return (outchain); 6510 } else { 6511 /* save off the end and update the end-chain postion */ 6512 m = appendchain; 6513 while (m) { 6514 if (SCTP_BUF_NEXT(m) == NULL) { 6515 *endofchain = m; 6516 break; 6517 } 6518 m = SCTP_BUF_NEXT(m); 6519 } 6520 return (appendchain); 6521 } 6522} 6523 6524static int 6525sctp_med_chunk_output(struct sctp_inpcb *inp, 6526 struct sctp_tcb *stcb, 6527 struct sctp_association *asoc, 6528 int *num_out, 6529 int *reason_code, 6530 int control_only, int from_where, 6531 struct timeval *now, int *now_filled, int frag_point, int so_locked 6532#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 6533 SCTP_UNUSED 6534#endif 6535); 6536 6537static void 6538sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr, 6539 uint32_t val SCTP_UNUSED) 6540{ 6541 struct sctp_copy_all *ca; 6542 struct mbuf *m; 6543 int ret = 0; 6544 int added_control = 0; 6545 int un_sent, do_chunk_output = 1; 6546 struct sctp_association *asoc; 6547 struct sctp_nets *net; 6548 6549 ca = (struct sctp_copy_all *)ptr; 6550 if (ca->m == NULL) { 6551 return; 6552 } 6553 if (ca->inp != inp) { 6554 /* TSNH */ 6555 return; 6556 } 6557 if (ca->sndlen > 0) { 6558 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT); 6559 if (m == NULL) { 6560 /* can't copy so we are done */ 6561 ca->cnt_failed++; 6562 return; 6563 } 6564#ifdef SCTP_MBUF_LOGGING 6565 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 6566 sctp_log_mbc(m, SCTP_MBUF_ICOPY); 6567 } 6568#endif 6569 } else { 6570 m = NULL; 6571 } 6572 SCTP_TCB_LOCK_ASSERT(stcb); 6573 if (stcb->asoc.alternate) { 6574 net = stcb->asoc.alternate; 6575 } else { 6576 net = stcb->asoc.primary_destination; 6577 } 6578 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) { 6579 /* Abort this assoc with m as the user defined reason */ 6580 if (m != NULL) { 6581 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT); 6582 } else { 6583 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 6584 0, M_NOWAIT, 1, MT_DATA); 6585 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr); 6586 } 6587 if (m != NULL) { 6588 struct sctp_paramhdr *ph; 6589 6590 ph = mtod(m, struct sctp_paramhdr *); 6591 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 6592 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen); 6593 } 6594 /* 6595 * We add one here to keep the assoc from dis-appearing on 6596 * us. 6597 */ 6598 atomic_add_int(&stcb->asoc.refcnt, 1); 6599 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED); 6600 /* 6601 * sctp_abort_an_association calls sctp_free_asoc() free 6602 * association will NOT free it since we incremented the 6603 * refcnt .. we do this to prevent it being freed and things 6604 * getting tricky since we could end up (from free_asoc) 6605 * calling inpcb_free which would get a recursive lock call 6606 * to the iterator lock.. But as a consequence of that the 6607 * stcb will return to us un-locked.. since free_asoc 6608 * returns with either no TCB or the TCB unlocked, we must 6609 * relock.. to unlock in the iterator timer :-0 6610 */ 6611 SCTP_TCB_LOCK(stcb); 6612 atomic_add_int(&stcb->asoc.refcnt, -1); 6613 goto no_chunk_output; 6614 } else { 6615 if (m) { 6616 ret = sctp_msg_append(stcb, net, m, 6617 &ca->sndrcv, 1); 6618 } 6619 asoc = &stcb->asoc; 6620 if (ca->sndrcv.sinfo_flags & SCTP_EOF) { 6621 /* shutdown this assoc */ 6622 int cnt; 6623 6624 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED); 6625 6626 if (TAILQ_EMPTY(&asoc->send_queue) && 6627 TAILQ_EMPTY(&asoc->sent_queue) && 6628 (cnt == 0)) { 6629 if (asoc->locked_on_sending) { 6630 goto abort_anyway; 6631 } 6632 /* 6633 * there is nothing queued to send, so I'm 6634 * done... 6635 */ 6636 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 6637 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 6638 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 6639 /* 6640 * only send SHUTDOWN the first time 6641 * through 6642 */ 6643 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 6644 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 6645 } 6646 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 6647 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 6648 sctp_stop_timers_for_shutdown(stcb); 6649 sctp_send_shutdown(stcb, net); 6650 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 6651 net); 6652 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 6653 asoc->primary_destination); 6654 added_control = 1; 6655 do_chunk_output = 0; 6656 } 6657 } else { 6658 /* 6659 * we still got (or just got) data to send, 6660 * so set SHUTDOWN_PENDING 6661 */ 6662 /* 6663 * XXX sockets draft says that SCTP_EOF 6664 * should be sent with no data. currently, 6665 * we will allow user data to be sent first 6666 * and move to SHUTDOWN-PENDING 6667 */ 6668 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 6669 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 6670 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 6671 if (asoc->locked_on_sending) { 6672 /* 6673 * Locked to send out the 6674 * data 6675 */ 6676 struct sctp_stream_queue_pending *sp; 6677 6678 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 6679 if (sp) { 6680 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 6681 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 6682 } 6683 } 6684 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 6685 if (TAILQ_EMPTY(&asoc->send_queue) && 6686 TAILQ_EMPTY(&asoc->sent_queue) && 6687 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 6688 abort_anyway: 6689 atomic_add_int(&stcb->asoc.refcnt, 1); 6690 sctp_abort_an_association(stcb->sctp_ep, stcb, 6691 NULL, SCTP_SO_NOT_LOCKED); 6692 atomic_add_int(&stcb->asoc.refcnt, -1); 6693 goto no_chunk_output; 6694 } 6695 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 6696 asoc->primary_destination); 6697 } 6698 } 6699 6700 } 6701 } 6702 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 6703 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 6704 6705 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 6706 (stcb->asoc.total_flight > 0) && 6707 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 6708 do_chunk_output = 0; 6709 } 6710 if (do_chunk_output) 6711 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED); 6712 else if (added_control) { 6713 int num_out, reason, now_filled = 0; 6714 struct timeval now; 6715 int frag_point; 6716 6717 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 6718 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 6719 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED); 6720 } 6721no_chunk_output: 6722 if (ret) { 6723 ca->cnt_failed++; 6724 } else { 6725 ca->cnt_sent++; 6726 } 6727} 6728 6729static void 6730sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED) 6731{ 6732 struct sctp_copy_all *ca; 6733 6734 ca = (struct sctp_copy_all *)ptr; 6735 /* 6736 * Do a notify here? Kacheong suggests that the notify be done at 6737 * the send time.. so you would push up a notification if any send 6738 * failed. Don't know if this is feasable since the only failures we 6739 * have is "memory" related and if you cannot get an mbuf to send 6740 * the data you surely can't get an mbuf to send up to notify the 6741 * user you can't send the data :-> 6742 */ 6743 6744 /* now free everything */ 6745 sctp_m_freem(ca->m); 6746 SCTP_FREE(ca, SCTP_M_COPYAL); 6747} 6748 6749static struct mbuf * 6750sctp_copy_out_all(struct uio *uio, int len) 6751{ 6752 struct mbuf *ret, *at; 6753 int left, willcpy, cancpy, error; 6754 6755 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA); 6756 if (ret == NULL) { 6757 /* TSNH */ 6758 return (NULL); 6759 } 6760 left = len; 6761 SCTP_BUF_LEN(ret) = 0; 6762 /* save space for the data chunk header */ 6763 cancpy = M_TRAILINGSPACE(ret); 6764 willcpy = min(cancpy, left); 6765 at = ret; 6766 while (left > 0) { 6767 /* Align data to the end */ 6768 error = uiomove(mtod(at, caddr_t), willcpy, uio); 6769 if (error) { 6770 err_out_now: 6771 sctp_m_freem(at); 6772 return (NULL); 6773 } 6774 SCTP_BUF_LEN(at) = willcpy; 6775 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0; 6776 left -= willcpy; 6777 if (left > 0) { 6778 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA); 6779 if (SCTP_BUF_NEXT(at) == NULL) { 6780 goto err_out_now; 6781 } 6782 at = SCTP_BUF_NEXT(at); 6783 SCTP_BUF_LEN(at) = 0; 6784 cancpy = M_TRAILINGSPACE(at); 6785 willcpy = min(cancpy, left); 6786 } 6787 } 6788 return (ret); 6789} 6790 6791static int 6792sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m, 6793 struct sctp_sndrcvinfo *srcv) 6794{ 6795 int ret; 6796 struct sctp_copy_all *ca; 6797 6798 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all), 6799 SCTP_M_COPYAL); 6800 if (ca == NULL) { 6801 sctp_m_freem(m); 6802 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6803 return (ENOMEM); 6804 } 6805 memset(ca, 0, sizeof(struct sctp_copy_all)); 6806 6807 ca->inp = inp; 6808 if (srcv) { 6809 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo)); 6810 } 6811 /* 6812 * take off the sendall flag, it would be bad if we failed to do 6813 * this :-0 6814 */ 6815 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL; 6816 /* get length and mbuf chain */ 6817 if (uio) { 6818 ca->sndlen = uio->uio_resid; 6819 ca->m = sctp_copy_out_all(uio, ca->sndlen); 6820 if (ca->m == NULL) { 6821 SCTP_FREE(ca, SCTP_M_COPYAL); 6822 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6823 return (ENOMEM); 6824 } 6825 } else { 6826 /* Gather the length of the send */ 6827 struct mbuf *mat; 6828 6829 ca->sndlen = 0; 6830 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) { 6831 ca->sndlen += SCTP_BUF_LEN(mat); 6832 } 6833 } 6834 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL, 6835 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES, 6836 SCTP_ASOC_ANY_STATE, 6837 (void *)ca, 0, 6838 sctp_sendall_completes, inp, 1); 6839 if (ret) { 6840 SCTP_PRINTF("Failed to initiate iterator for sendall\n"); 6841 SCTP_FREE(ca, SCTP_M_COPYAL); 6842 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); 6843 return (EFAULT); 6844 } 6845 return (0); 6846} 6847 6848 6849void 6850sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc) 6851{ 6852 struct sctp_tmit_chunk *chk, *nchk; 6853 6854 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 6855 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 6856 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 6857 if (chk->data) { 6858 sctp_m_freem(chk->data); 6859 chk->data = NULL; 6860 } 6861 asoc->ctrl_queue_cnt--; 6862 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6863 } 6864 } 6865} 6866 6867void 6868sctp_toss_old_asconf(struct sctp_tcb *stcb) 6869{ 6870 struct sctp_association *asoc; 6871 struct sctp_tmit_chunk *chk, *nchk; 6872 struct sctp_asconf_chunk *acp; 6873 6874 asoc = &stcb->asoc; 6875 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 6876 /* find SCTP_ASCONF chunk in queue */ 6877 if (chk->rec.chunk_id.id == SCTP_ASCONF) { 6878 if (chk->data) { 6879 acp = mtod(chk->data, struct sctp_asconf_chunk *); 6880 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) { 6881 /* Not Acked yet */ 6882 break; 6883 } 6884 } 6885 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 6886 if (chk->data) { 6887 sctp_m_freem(chk->data); 6888 chk->data = NULL; 6889 } 6890 asoc->ctrl_queue_cnt--; 6891 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6892 } 6893 } 6894} 6895 6896 6897static void 6898sctp_clean_up_datalist(struct sctp_tcb *stcb, 6899 struct sctp_association *asoc, 6900 struct sctp_tmit_chunk **data_list, 6901 int bundle_at, 6902 struct sctp_nets *net) 6903{ 6904 int i; 6905 struct sctp_tmit_chunk *tp1; 6906 6907 for (i = 0; i < bundle_at; i++) { 6908 /* off of the send queue */ 6909 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next); 6910 asoc->send_queue_cnt--; 6911 if (i > 0) { 6912 /* 6913 * Any chunk NOT 0 you zap the time chunk 0 gets 6914 * zapped or set based on if a RTO measurment is 6915 * needed. 6916 */ 6917 data_list[i]->do_rtt = 0; 6918 } 6919 /* record time */ 6920 data_list[i]->sent_rcv_time = net->last_sent_time; 6921 data_list[i]->rec.data.cwnd_at_send = net->cwnd; 6922 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq; 6923 if (data_list[i]->whoTo == NULL) { 6924 data_list[i]->whoTo = net; 6925 atomic_add_int(&net->ref_count, 1); 6926 } 6927 /* on to the sent queue */ 6928 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead); 6929 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { 6930 struct sctp_tmit_chunk *tpp; 6931 6932 /* need to move back */ 6933 back_up_more: 6934 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next); 6935 if (tpp == NULL) { 6936 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next); 6937 goto all_done; 6938 } 6939 tp1 = tpp; 6940 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { 6941 goto back_up_more; 6942 } 6943 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next); 6944 } else { 6945 TAILQ_INSERT_TAIL(&asoc->sent_queue, 6946 data_list[i], 6947 sctp_next); 6948 } 6949all_done: 6950 /* This does not lower until the cum-ack passes it */ 6951 asoc->sent_queue_cnt++; 6952 if ((asoc->peers_rwnd <= 0) && 6953 (asoc->total_flight == 0) && 6954 (bundle_at == 1)) { 6955 /* Mark the chunk as being a window probe */ 6956 SCTP_STAT_INCR(sctps_windowprobed); 6957 } 6958#ifdef SCTP_AUDITING_ENABLED 6959 sctp_audit_log(0xC2, 3); 6960#endif 6961 data_list[i]->sent = SCTP_DATAGRAM_SENT; 6962 data_list[i]->snd_count = 1; 6963 data_list[i]->rec.data.chunk_was_revoked = 0; 6964 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 6965 sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 6966 data_list[i]->whoTo->flight_size, 6967 data_list[i]->book_size, 6968 (uintptr_t) data_list[i]->whoTo, 6969 data_list[i]->rec.data.TSN_seq); 6970 } 6971 sctp_flight_size_increase(data_list[i]); 6972 sctp_total_flight_increase(stcb, data_list[i]); 6973 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { 6974 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 6975 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); 6976 } 6977 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 6978 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); 6979 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 6980 /* SWS sender side engages */ 6981 asoc->peers_rwnd = 0; 6982 } 6983 } 6984 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) { 6985 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net); 6986 } 6987} 6988 6989static void 6990sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked 6991#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 6992 SCTP_UNUSED 6993#endif 6994) 6995{ 6996 struct sctp_tmit_chunk *chk, *nchk; 6997 6998 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 6999 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 7000 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ 7001 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 7002 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 7003 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) || 7004 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 7005 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 7006 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 7007 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 7008 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 7009 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 7010 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 7011 /* Stray chunks must be cleaned up */ 7012 clean_up_anyway: 7013 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 7014 if (chk->data) { 7015 sctp_m_freem(chk->data); 7016 chk->data = NULL; 7017 } 7018 asoc->ctrl_queue_cnt--; 7019 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) 7020 asoc->fwd_tsn_cnt--; 7021 sctp_free_a_chunk(stcb, chk, so_locked); 7022 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 7023 /* special handling, we must look into the param */ 7024 if (chk != asoc->str_reset) { 7025 goto clean_up_anyway; 7026 } 7027 } 7028 } 7029} 7030 7031 7032static int 7033sctp_can_we_split_this(struct sctp_tcb *stcb, 7034 uint32_t length, 7035 uint32_t goal_mtu, uint32_t frag_point, int eeor_on) 7036{ 7037 /* 7038 * Make a decision on if I should split a msg into multiple parts. 7039 * This is only asked of incomplete messages. 7040 */ 7041 if (eeor_on) { 7042 /* 7043 * If we are doing EEOR we need to always send it if its the 7044 * entire thing, since it might be all the guy is putting in 7045 * the hopper. 7046 */ 7047 if (goal_mtu >= length) { 7048 /*- 7049 * If we have data outstanding, 7050 * we get another chance when the sack 7051 * arrives to transmit - wait for more data 7052 */ 7053 if (stcb->asoc.total_flight == 0) { 7054 /* 7055 * If nothing is in flight, we zero the 7056 * packet counter. 7057 */ 7058 return (length); 7059 } 7060 return (0); 7061 7062 } else { 7063 /* You can fill the rest */ 7064 return (goal_mtu); 7065 } 7066 } 7067 /*- 7068 * For those strange folk that make the send buffer 7069 * smaller than our fragmentation point, we can't 7070 * get a full msg in so we have to allow splitting. 7071 */ 7072 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) { 7073 return (length); 7074 } 7075 if ((length <= goal_mtu) || 7076 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) { 7077 /* Sub-optimial residual don't split in non-eeor mode. */ 7078 return (0); 7079 } 7080 /* 7081 * If we reach here length is larger than the goal_mtu. Do we wish 7082 * to split it for the sake of packet putting together? 7083 */ 7084 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) { 7085 /* Its ok to split it */ 7086 return (min(goal_mtu, frag_point)); 7087 } 7088 /* Nope, can't split */ 7089 return (0); 7090 7091} 7092 7093static uint32_t 7094sctp_move_to_outqueue(struct sctp_tcb *stcb, 7095 struct sctp_stream_out *strq, 7096 uint32_t goal_mtu, 7097 uint32_t frag_point, 7098 int *locked, 7099 int *giveup, 7100 int eeor_mode, 7101 int *bail, 7102 int so_locked 7103#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7104 SCTP_UNUSED 7105#endif 7106) 7107{ 7108 /* Move from the stream to the send_queue keeping track of the total */ 7109 struct sctp_association *asoc; 7110 struct sctp_stream_queue_pending *sp; 7111 struct sctp_tmit_chunk *chk; 7112 struct sctp_data_chunk *dchkh; 7113 uint32_t to_move, length; 7114 uint8_t rcv_flags = 0; 7115 uint8_t some_taken; 7116 uint8_t send_lock_up = 0; 7117 7118 SCTP_TCB_LOCK_ASSERT(stcb); 7119 asoc = &stcb->asoc; 7120one_more_time: 7121 /* sa_ignore FREED_MEMORY */ 7122 sp = TAILQ_FIRST(&strq->outqueue); 7123 if (sp == NULL) { 7124 *locked = 0; 7125 if (send_lock_up == 0) { 7126 SCTP_TCB_SEND_LOCK(stcb); 7127 send_lock_up = 1; 7128 } 7129 sp = TAILQ_FIRST(&strq->outqueue); 7130 if (sp) { 7131 goto one_more_time; 7132 } 7133 if (strq->last_msg_incomplete) { 7134 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n", 7135 strq->stream_no, 7136 strq->last_msg_incomplete); 7137 strq->last_msg_incomplete = 0; 7138 } 7139 to_move = 0; 7140 if (send_lock_up) { 7141 SCTP_TCB_SEND_UNLOCK(stcb); 7142 send_lock_up = 0; 7143 } 7144 goto out_of; 7145 } 7146 if ((sp->msg_is_complete) && (sp->length == 0)) { 7147 if (sp->sender_all_done) { 7148 /* 7149 * We are doing differed cleanup. Last time through 7150 * when we took all the data the sender_all_done was 7151 * not set. 7152 */ 7153 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) { 7154 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n"); 7155 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 7156 sp->sender_all_done, 7157 sp->length, 7158 sp->msg_is_complete, 7159 sp->put_last_out, 7160 send_lock_up); 7161 } 7162 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) { 7163 SCTP_TCB_SEND_LOCK(stcb); 7164 send_lock_up = 1; 7165 } 7166 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 7167 TAILQ_REMOVE(&strq->outqueue, sp, next); 7168 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); 7169 if (sp->net) { 7170 sctp_free_remote_addr(sp->net); 7171 sp->net = NULL; 7172 } 7173 if (sp->data) { 7174 sctp_m_freem(sp->data); 7175 sp->data = NULL; 7176 } 7177 sctp_free_a_strmoq(stcb, sp, so_locked); 7178 /* we can't be locked to it */ 7179 *locked = 0; 7180 stcb->asoc.locked_on_sending = NULL; 7181 if (send_lock_up) { 7182 SCTP_TCB_SEND_UNLOCK(stcb); 7183 send_lock_up = 0; 7184 } 7185 /* back to get the next msg */ 7186 goto one_more_time; 7187 } else { 7188 /* 7189 * sender just finished this but still holds a 7190 * reference 7191 */ 7192 *locked = 1; 7193 *giveup = 1; 7194 to_move = 0; 7195 goto out_of; 7196 } 7197 } else { 7198 /* is there some to get */ 7199 if (sp->length == 0) { 7200 /* no */ 7201 *locked = 1; 7202 *giveup = 1; 7203 to_move = 0; 7204 goto out_of; 7205 } else if (sp->discard_rest) { 7206 if (send_lock_up == 0) { 7207 SCTP_TCB_SEND_LOCK(stcb); 7208 send_lock_up = 1; 7209 } 7210 /* Whack down the size */ 7211 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length); 7212 if ((stcb->sctp_socket != NULL) && \ 7213 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 7214 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { 7215 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length); 7216 } 7217 if (sp->data) { 7218 sctp_m_freem(sp->data); 7219 sp->data = NULL; 7220 sp->tail_mbuf = NULL; 7221 } 7222 sp->length = 0; 7223 sp->some_taken = 1; 7224 *locked = 1; 7225 *giveup = 1; 7226 to_move = 0; 7227 goto out_of; 7228 } 7229 } 7230 some_taken = sp->some_taken; 7231 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) { 7232 sp->msg_is_complete = 1; 7233 } 7234re_look: 7235 length = sp->length; 7236 if (sp->msg_is_complete) { 7237 /* The message is complete */ 7238 to_move = min(length, frag_point); 7239 if (to_move == length) { 7240 /* All of it fits in the MTU */ 7241 if (sp->some_taken) { 7242 rcv_flags |= SCTP_DATA_LAST_FRAG; 7243 sp->put_last_out = 1; 7244 } else { 7245 rcv_flags |= SCTP_DATA_NOT_FRAG; 7246 sp->put_last_out = 1; 7247 } 7248 } else { 7249 /* Not all of it fits, we fragment */ 7250 if (sp->some_taken == 0) { 7251 rcv_flags |= SCTP_DATA_FIRST_FRAG; 7252 } 7253 sp->some_taken = 1; 7254 } 7255 } else { 7256 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode); 7257 if (to_move) { 7258 /*- 7259 * We use a snapshot of length in case it 7260 * is expanding during the compare. 7261 */ 7262 uint32_t llen; 7263 7264 llen = length; 7265 if (to_move >= llen) { 7266 to_move = llen; 7267 if (send_lock_up == 0) { 7268 /*- 7269 * We are taking all of an incomplete msg 7270 * thus we need a send lock. 7271 */ 7272 SCTP_TCB_SEND_LOCK(stcb); 7273 send_lock_up = 1; 7274 if (sp->msg_is_complete) { 7275 /* 7276 * the sender finished the 7277 * msg 7278 */ 7279 goto re_look; 7280 } 7281 } 7282 } 7283 if (sp->some_taken == 0) { 7284 rcv_flags |= SCTP_DATA_FIRST_FRAG; 7285 sp->some_taken = 1; 7286 } 7287 } else { 7288 /* Nothing to take. */ 7289 if (sp->some_taken) { 7290 *locked = 1; 7291 } 7292 *giveup = 1; 7293 to_move = 0; 7294 goto out_of; 7295 } 7296 } 7297 7298 /* If we reach here, we can copy out a chunk */ 7299 sctp_alloc_a_chunk(stcb, chk); 7300 if (chk == NULL) { 7301 /* No chunk memory */ 7302 *giveup = 1; 7303 to_move = 0; 7304 goto out_of; 7305 } 7306 /* 7307 * Setup for unordered if needed by looking at the user sent info 7308 * flags. 7309 */ 7310 if (sp->sinfo_flags & SCTP_UNORDERED) { 7311 rcv_flags |= SCTP_DATA_UNORDERED; 7312 } 7313 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) || 7314 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) { 7315 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY; 7316 } 7317 /* clear out the chunk before setting up */ 7318 memset(chk, 0, sizeof(*chk)); 7319 chk->rec.data.rcv_flags = rcv_flags; 7320 7321 if (to_move >= length) { 7322 /* we think we can steal the whole thing */ 7323 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) { 7324 SCTP_TCB_SEND_LOCK(stcb); 7325 send_lock_up = 1; 7326 } 7327 if (to_move < sp->length) { 7328 /* bail, it changed */ 7329 goto dont_do_it; 7330 } 7331 chk->data = sp->data; 7332 chk->last_mbuf = sp->tail_mbuf; 7333 /* register the stealing */ 7334 sp->data = sp->tail_mbuf = NULL; 7335 } else { 7336 struct mbuf *m; 7337 7338dont_do_it: 7339 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT); 7340 chk->last_mbuf = NULL; 7341 if (chk->data == NULL) { 7342 sp->some_taken = some_taken; 7343 sctp_free_a_chunk(stcb, chk, so_locked); 7344 *bail = 1; 7345 to_move = 0; 7346 goto out_of; 7347 } 7348#ifdef SCTP_MBUF_LOGGING 7349 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 7350 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY); 7351 } 7352#endif 7353 /* Pull off the data */ 7354 m_adj(sp->data, to_move); 7355 /* Now lets work our way down and compact it */ 7356 m = sp->data; 7357 while (m && (SCTP_BUF_LEN(m) == 0)) { 7358 sp->data = SCTP_BUF_NEXT(m); 7359 SCTP_BUF_NEXT(m) = NULL; 7360 if (sp->tail_mbuf == m) { 7361 /*- 7362 * Freeing tail? TSNH since 7363 * we supposedly were taking less 7364 * than the sp->length. 7365 */ 7366#ifdef INVARIANTS 7367 panic("Huh, freing tail? - TSNH"); 7368#else 7369 SCTP_PRINTF("Huh, freeing tail? - TSNH\n"); 7370 sp->tail_mbuf = sp->data = NULL; 7371 sp->length = 0; 7372#endif 7373 7374 } 7375 sctp_m_free(m); 7376 m = sp->data; 7377 } 7378 } 7379 if (SCTP_BUF_IS_EXTENDED(chk->data)) { 7380 chk->copy_by_ref = 1; 7381 } else { 7382 chk->copy_by_ref = 0; 7383 } 7384 /* 7385 * get last_mbuf and counts of mb useage This is ugly but hopefully 7386 * its only one mbuf. 7387 */ 7388 if (chk->last_mbuf == NULL) { 7389 chk->last_mbuf = chk->data; 7390 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) { 7391 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf); 7392 } 7393 } 7394 if (to_move > length) { 7395 /*- This should not happen either 7396 * since we always lower to_move to the size 7397 * of sp->length if its larger. 7398 */ 7399#ifdef INVARIANTS 7400 panic("Huh, how can to_move be larger?"); 7401#else 7402 SCTP_PRINTF("Huh, how can to_move be larger?\n"); 7403 sp->length = 0; 7404#endif 7405 } else { 7406 atomic_subtract_int(&sp->length, to_move); 7407 } 7408 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) { 7409 /* Not enough room for a chunk header, get some */ 7410 struct mbuf *m; 7411 7412 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA); 7413 if (m == NULL) { 7414 /* 7415 * we're in trouble here. _PREPEND below will free 7416 * all the data if there is no leading space, so we 7417 * must put the data back and restore. 7418 */ 7419 if (send_lock_up == 0) { 7420 SCTP_TCB_SEND_LOCK(stcb); 7421 send_lock_up = 1; 7422 } 7423 if (chk->data == NULL) { 7424 /* unsteal the data */ 7425 sp->data = chk->data; 7426 sp->tail_mbuf = chk->last_mbuf; 7427 } else { 7428 struct mbuf *m_tmp; 7429 7430 /* reassemble the data */ 7431 m_tmp = sp->data; 7432 sp->data = chk->data; 7433 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp; 7434 } 7435 sp->some_taken = some_taken; 7436 atomic_add_int(&sp->length, to_move); 7437 chk->data = NULL; 7438 *bail = 1; 7439 sctp_free_a_chunk(stcb, chk, so_locked); 7440 to_move = 0; 7441 goto out_of; 7442 } else { 7443 SCTP_BUF_LEN(m) = 0; 7444 SCTP_BUF_NEXT(m) = chk->data; 7445 chk->data = m; 7446 M_ALIGN(chk->data, 4); 7447 } 7448 } 7449 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT); 7450 if (chk->data == NULL) { 7451 /* HELP, TSNH since we assured it would not above? */ 7452#ifdef INVARIANTS 7453 panic("prepend failes HELP?"); 7454#else 7455 SCTP_PRINTF("prepend fails HELP?\n"); 7456 sctp_free_a_chunk(stcb, chk, so_locked); 7457#endif 7458 *bail = 1; 7459 to_move = 0; 7460 goto out_of; 7461 } 7462 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk)); 7463 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk)); 7464 chk->book_size_scale = 0; 7465 chk->sent = SCTP_DATAGRAM_UNSENT; 7466 7467 chk->flags = 0; 7468 chk->asoc = &stcb->asoc; 7469 chk->pad_inplace = 0; 7470 chk->no_fr_allowed = 0; 7471 chk->rec.data.stream_seq = strq->next_sequence_send; 7472 if ((rcv_flags & SCTP_DATA_LAST_FRAG) && 7473 !(rcv_flags & SCTP_DATA_UNORDERED)) { 7474 strq->next_sequence_send++; 7475 } 7476 chk->rec.data.stream_number = sp->stream; 7477 chk->rec.data.payloadtype = sp->ppid; 7478 chk->rec.data.context = sp->context; 7479 chk->rec.data.doing_fast_retransmit = 0; 7480 7481 chk->rec.data.timetodrop = sp->ts; 7482 chk->flags = sp->act_flags; 7483 7484 if (sp->net) { 7485 chk->whoTo = sp->net; 7486 atomic_add_int(&chk->whoTo->ref_count, 1); 7487 } else 7488 chk->whoTo = NULL; 7489 7490 if (sp->holds_key_ref) { 7491 chk->auth_keyid = sp->auth_keyid; 7492 sctp_auth_key_acquire(stcb, chk->auth_keyid); 7493 chk->holds_key_ref = 1; 7494 } 7495 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1); 7496 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) { 7497 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND, 7498 (uintptr_t) stcb, sp->length, 7499 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq), 7500 chk->rec.data.TSN_seq); 7501 } 7502 dchkh = mtod(chk->data, struct sctp_data_chunk *); 7503 /* 7504 * Put the rest of the things in place now. Size was done earlier in 7505 * previous loop prior to padding. 7506 */ 7507 7508#ifdef SCTP_ASOCLOG_OF_TSNS 7509 SCTP_TCB_LOCK_ASSERT(stcb); 7510 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) { 7511 asoc->tsn_out_at = 0; 7512 asoc->tsn_out_wrapped = 1; 7513 } 7514 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq; 7515 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number; 7516 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq; 7517 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size; 7518 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags; 7519 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb; 7520 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at; 7521 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2; 7522 asoc->tsn_out_at++; 7523#endif 7524 7525 dchkh->ch.chunk_type = SCTP_DATA; 7526 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags; 7527 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq); 7528 dchkh->dp.stream_id = htons(strq->stream_no); 7529 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq); 7530 dchkh->dp.protocol_id = chk->rec.data.payloadtype; 7531 dchkh->ch.chunk_length = htons(chk->send_size); 7532 /* Now advance the chk->send_size by the actual pad needed. */ 7533 if (chk->send_size < SCTP_SIZE32(chk->book_size)) { 7534 /* need a pad */ 7535 struct mbuf *lm; 7536 int pads; 7537 7538 pads = SCTP_SIZE32(chk->book_size) - chk->send_size; 7539 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf); 7540 if (lm != NULL) { 7541 chk->last_mbuf = lm; 7542 chk->pad_inplace = 1; 7543 } 7544 chk->send_size += pads; 7545 } 7546 if (PR_SCTP_ENABLED(chk->flags)) { 7547 asoc->pr_sctp_cnt++; 7548 } 7549 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) { 7550 /* All done pull and kill the message */ 7551 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 7552 if (sp->put_last_out == 0) { 7553 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n"); 7554 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 7555 sp->sender_all_done, 7556 sp->length, 7557 sp->msg_is_complete, 7558 sp->put_last_out, 7559 send_lock_up); 7560 } 7561 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) { 7562 SCTP_TCB_SEND_LOCK(stcb); 7563 send_lock_up = 1; 7564 } 7565 TAILQ_REMOVE(&strq->outqueue, sp, next); 7566 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); 7567 if (sp->net) { 7568 sctp_free_remote_addr(sp->net); 7569 sp->net = NULL; 7570 } 7571 if (sp->data) { 7572 sctp_m_freem(sp->data); 7573 sp->data = NULL; 7574 } 7575 sctp_free_a_strmoq(stcb, sp, so_locked); 7576 7577 /* we can't be locked to it */ 7578 *locked = 0; 7579 stcb->asoc.locked_on_sending = NULL; 7580 } else { 7581 /* more to go, we are locked */ 7582 *locked = 1; 7583 } 7584 asoc->chunks_on_out_queue++; 7585 strq->chunks_on_queues++; 7586 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next); 7587 asoc->send_queue_cnt++; 7588out_of: 7589 if (send_lock_up) { 7590 SCTP_TCB_SEND_UNLOCK(stcb); 7591 } 7592 return (to_move); 7593} 7594 7595 7596static void 7597sctp_fill_outqueue(struct sctp_tcb *stcb, 7598 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked 7599#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7600 SCTP_UNUSED 7601#endif 7602) 7603{ 7604 struct sctp_association *asoc; 7605 struct sctp_stream_out *strq; 7606 int goal_mtu, moved_how_much, total_moved = 0, bail = 0; 7607 int locked, giveup; 7608 7609 SCTP_TCB_LOCK_ASSERT(stcb); 7610 asoc = &stcb->asoc; 7611 switch (net->ro._l_addr.sa.sa_family) { 7612#ifdef INET 7613 case AF_INET: 7614 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 7615 break; 7616#endif 7617#ifdef INET6 7618 case AF_INET6: 7619 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD; 7620 break; 7621#endif 7622 default: 7623 /* TSNH */ 7624 goal_mtu = net->mtu; 7625 break; 7626 } 7627 /* Need an allowance for the data chunk header too */ 7628 goal_mtu -= sizeof(struct sctp_data_chunk); 7629 7630 /* must make even word boundary */ 7631 goal_mtu &= 0xfffffffc; 7632 if (asoc->locked_on_sending) { 7633 /* We are stuck on one stream until the message completes. */ 7634 strq = asoc->locked_on_sending; 7635 locked = 1; 7636 } else { 7637 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); 7638 locked = 0; 7639 } 7640 while ((goal_mtu > 0) && strq) { 7641 giveup = 0; 7642 bail = 0; 7643 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked, 7644 &giveup, eeor_mode, &bail, so_locked); 7645 if (moved_how_much) 7646 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much); 7647 7648 if (locked) { 7649 asoc->locked_on_sending = strq; 7650 if ((moved_how_much == 0) || (giveup) || bail) 7651 /* no more to move for now */ 7652 break; 7653 } else { 7654 asoc->locked_on_sending = NULL; 7655 if ((giveup) || bail) { 7656 break; 7657 } 7658 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); 7659 if (strq == NULL) { 7660 break; 7661 } 7662 } 7663 total_moved += moved_how_much; 7664 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk)); 7665 goal_mtu &= 0xfffffffc; 7666 } 7667 if (bail) 7668 *quit_now = 1; 7669 7670 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc); 7671 7672 if (total_moved == 0) { 7673 if ((stcb->asoc.sctp_cmt_on_off == 0) && 7674 (net == stcb->asoc.primary_destination)) { 7675 /* ran dry for primary network net */ 7676 SCTP_STAT_INCR(sctps_primary_randry); 7677 } else if (stcb->asoc.sctp_cmt_on_off > 0) { 7678 /* ran dry with CMT on */ 7679 SCTP_STAT_INCR(sctps_cmt_randry); 7680 } 7681 } 7682} 7683 7684void 7685sctp_fix_ecn_echo(struct sctp_association *asoc) 7686{ 7687 struct sctp_tmit_chunk *chk; 7688 7689 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7690 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 7691 chk->sent = SCTP_DATAGRAM_UNSENT; 7692 } 7693 } 7694} 7695 7696void 7697sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net) 7698{ 7699 struct sctp_association *asoc; 7700 struct sctp_tmit_chunk *chk; 7701 struct sctp_stream_queue_pending *sp; 7702 unsigned int i; 7703 7704 if (net == NULL) { 7705 return; 7706 } 7707 asoc = &stcb->asoc; 7708 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 7709 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { 7710 if (sp->net == net) { 7711 sctp_free_remote_addr(sp->net); 7712 sp->net = NULL; 7713 } 7714 } 7715 } 7716 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 7717 if (chk->whoTo == net) { 7718 sctp_free_remote_addr(chk->whoTo); 7719 chk->whoTo = NULL; 7720 } 7721 } 7722} 7723 7724int 7725sctp_med_chunk_output(struct sctp_inpcb *inp, 7726 struct sctp_tcb *stcb, 7727 struct sctp_association *asoc, 7728 int *num_out, 7729 int *reason_code, 7730 int control_only, int from_where, 7731 struct timeval *now, int *now_filled, int frag_point, int so_locked 7732#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7733 SCTP_UNUSED 7734#endif 7735) 7736{ 7737 /** 7738 * Ok this is the generic chunk service queue. we must do the 7739 * following: - Service the stream queue that is next, moving any 7740 * message (note I must get a complete message i.e. FIRST/MIDDLE and 7741 * LAST to the out queue in one pass) and assigning TSN's - Check to 7742 * see if the cwnd/rwnd allows any output, if so we go ahead and 7743 * fomulate and send the low level chunks. Making sure to combine 7744 * any control in the control chunk queue also. 7745 */ 7746 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL; 7747 struct mbuf *outchain, *endoutchain; 7748 struct sctp_tmit_chunk *chk, *nchk; 7749 7750 /* temp arrays for unlinking */ 7751 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 7752 int no_fragmentflg, error; 7753 unsigned int max_rwnd_per_dest, max_send_per_dest; 7754 int one_chunk, hbflag, skip_data_for_this_net; 7755 int asconf, cookie, no_out_cnt; 7756 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode; 7757 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out; 7758 int tsns_sent = 0; 7759 uint32_t auth_offset = 0; 7760 struct sctp_auth_chunk *auth = NULL; 7761 uint16_t auth_keyid; 7762 int override_ok = 1; 7763 int skip_fill_up = 0; 7764 int data_auth_reqd = 0; 7765 7766 /* 7767 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the 7768 * destination. 7769 */ 7770 int quit_now = 0; 7771 7772 *num_out = 0; 7773 *reason_code = 0; 7774 auth_keyid = stcb->asoc.authinfo.active_keyid; 7775 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) || 7776 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) || 7777 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { 7778 eeor_mode = 1; 7779 } else { 7780 eeor_mode = 0; 7781 } 7782 ctl_cnt = no_out_cnt = asconf = cookie = 0; 7783 /* 7784 * First lets prime the pump. For each destination, if there is room 7785 * in the flight size, attempt to pull an MTU's worth out of the 7786 * stream queues into the general send_queue 7787 */ 7788#ifdef SCTP_AUDITING_ENABLED 7789 sctp_audit_log(0xC2, 2); 7790#endif 7791 SCTP_TCB_LOCK_ASSERT(stcb); 7792 hbflag = 0; 7793 if ((control_only) || (asoc->stream_reset_outstanding)) 7794 no_data_chunks = 1; 7795 else 7796 no_data_chunks = 0; 7797 7798 /* Nothing to possible to send? */ 7799 if ((TAILQ_EMPTY(&asoc->control_send_queue) || 7800 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) && 7801 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7802 TAILQ_EMPTY(&asoc->send_queue) && 7803 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { 7804nothing_to_send: 7805 *reason_code = 9; 7806 return (0); 7807 } 7808 if (asoc->peers_rwnd == 0) { 7809 /* No room in peers rwnd */ 7810 *reason_code = 1; 7811 if (asoc->total_flight > 0) { 7812 /* we are allowed one chunk in flight */ 7813 no_data_chunks = 1; 7814 } 7815 } 7816 if (stcb->asoc.ecn_echo_cnt_onq) { 7817 /* Record where a sack goes, if any */ 7818 if (no_data_chunks && 7819 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) { 7820 /* Nothing but ECNe to send - we don't do that */ 7821 goto nothing_to_send; 7822 } 7823 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7824 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 7825 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { 7826 sack_goes_to = chk->whoTo; 7827 break; 7828 } 7829 } 7830 } 7831 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets); 7832 if (stcb->sctp_socket) 7833 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets; 7834 else 7835 max_send_per_dest = 0; 7836 if (no_data_chunks == 0) { 7837 /* How many non-directed chunks are there? */ 7838 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 7839 if (chk->whoTo == NULL) { 7840 /* 7841 * We already have non-directed chunks on 7842 * the queue, no need to do a fill-up. 7843 */ 7844 skip_fill_up = 1; 7845 break; 7846 } 7847 } 7848 7849 } 7850 if ((no_data_chunks == 0) && 7851 (skip_fill_up == 0) && 7852 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) { 7853 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 7854 /* 7855 * This for loop we are in takes in each net, if 7856 * its's got space in cwnd and has data sent to it 7857 * (when CMT is off) then it calls 7858 * sctp_fill_outqueue for the net. This gets data on 7859 * the send queue for that network. 7860 * 7861 * In sctp_fill_outqueue TSN's are assigned and data is 7862 * copied out of the stream buffers. Note mostly 7863 * copy by reference (we hope). 7864 */ 7865 net->window_probe = 0; 7866 if ((net != stcb->asoc.alternate) && 7867 ((net->dest_state & SCTP_ADDR_PF) || 7868 (!(net->dest_state & SCTP_ADDR_REACHABLE)) || 7869 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) { 7870 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7871 sctp_log_cwnd(stcb, net, 1, 7872 SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7873 } 7874 continue; 7875 } 7876 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && 7877 (net->flight_size == 0)) { 7878 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net); 7879 } 7880 if (net->flight_size >= net->cwnd) { 7881 /* skip this network, no room - can't fill */ 7882 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7883 sctp_log_cwnd(stcb, net, 3, 7884 SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7885 } 7886 continue; 7887 } 7888 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7889 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7890 } 7891 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked); 7892 if (quit_now) { 7893 /* memory alloc failure */ 7894 no_data_chunks = 1; 7895 break; 7896 } 7897 } 7898 } 7899 /* now service each destination and send out what we can for it */ 7900 /* Nothing to send? */ 7901 if (TAILQ_EMPTY(&asoc->control_send_queue) && 7902 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7903 TAILQ_EMPTY(&asoc->send_queue)) { 7904 *reason_code = 8; 7905 return (0); 7906 } 7907 if (asoc->sctp_cmt_on_off > 0) { 7908 /* get the last start point */ 7909 start_at = asoc->last_net_cmt_send_started; 7910 if (start_at == NULL) { 7911 /* null so to beginning */ 7912 start_at = TAILQ_FIRST(&asoc->nets); 7913 } else { 7914 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next); 7915 if (start_at == NULL) { 7916 start_at = TAILQ_FIRST(&asoc->nets); 7917 } 7918 } 7919 asoc->last_net_cmt_send_started = start_at; 7920 } else { 7921 start_at = TAILQ_FIRST(&asoc->nets); 7922 } 7923 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7924 if (chk->whoTo == NULL) { 7925 if (asoc->alternate) { 7926 chk->whoTo = asoc->alternate; 7927 } else { 7928 chk->whoTo = asoc->primary_destination; 7929 } 7930 atomic_add_int(&chk->whoTo->ref_count, 1); 7931 } 7932 } 7933 old_start_at = NULL; 7934again_one_more_time: 7935 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) { 7936 /* how much can we send? */ 7937 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */ 7938 if (old_start_at && (old_start_at == net)) { 7939 /* through list ocmpletely. */ 7940 break; 7941 } 7942 tsns_sent = 0xa; 7943 if (TAILQ_EMPTY(&asoc->control_send_queue) && 7944 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7945 (net->flight_size >= net->cwnd)) { 7946 /* 7947 * Nothing on control or asconf and flight is full, 7948 * we can skip even in the CMT case. 7949 */ 7950 continue; 7951 } 7952 bundle_at = 0; 7953 endoutchain = outchain = NULL; 7954 no_fragmentflg = 1; 7955 one_chunk = 0; 7956 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 7957 skip_data_for_this_net = 1; 7958 } else { 7959 skip_data_for_this_net = 0; 7960 } 7961 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) { 7962 /* 7963 * if we have a route and an ifp check to see if we 7964 * have room to send to this guy 7965 */ 7966 struct ifnet *ifp; 7967 7968 ifp = net->ro.ro_rt->rt_ifp; 7969 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) { 7970 SCTP_STAT_INCR(sctps_ifnomemqueued); 7971 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 7972 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED); 7973 } 7974 continue; 7975 } 7976 } 7977 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { 7978#ifdef INET 7979 case AF_INET: 7980 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr)); 7981 break; 7982#endif 7983#ifdef INET6 7984 case AF_INET6: 7985 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)); 7986 break; 7987#endif 7988 default: 7989 /* TSNH */ 7990 mtu = net->mtu; 7991 break; 7992 } 7993 mx_mtu = mtu; 7994 to_out = 0; 7995 if (mtu > asoc->peers_rwnd) { 7996 if (asoc->total_flight > 0) { 7997 /* We have a packet in flight somewhere */ 7998 r_mtu = asoc->peers_rwnd; 7999 } else { 8000 /* We are always allowed to send one MTU out */ 8001 one_chunk = 1; 8002 r_mtu = mtu; 8003 } 8004 } else { 8005 r_mtu = mtu; 8006 } 8007 /************************/ 8008 /* ASCONF transmission */ 8009 /************************/ 8010 /* Now first lets go through the asconf queue */ 8011 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 8012 if (chk->rec.chunk_id.id != SCTP_ASCONF) { 8013 continue; 8014 } 8015 if (chk->whoTo == NULL) { 8016 if (asoc->alternate == NULL) { 8017 if (asoc->primary_destination != net) { 8018 break; 8019 } 8020 } else { 8021 if (asoc->alternate != net) { 8022 break; 8023 } 8024 } 8025 } else { 8026 if (chk->whoTo != net) { 8027 break; 8028 } 8029 } 8030 if (chk->data == NULL) { 8031 break; 8032 } 8033 if (chk->sent != SCTP_DATAGRAM_UNSENT && 8034 chk->sent != SCTP_DATAGRAM_RESEND) { 8035 break; 8036 } 8037 /* 8038 * if no AUTH is yet included and this chunk 8039 * requires it, make sure to account for it. We 8040 * don't apply the size until the AUTH chunk is 8041 * actually added below in case there is no room for 8042 * this chunk. NOTE: we overload the use of "omtu" 8043 * here 8044 */ 8045 if ((auth == NULL) && 8046 sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8047 stcb->asoc.peer_auth_chunks)) { 8048 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8049 } else 8050 omtu = 0; 8051 /* Here we do NOT factor the r_mtu */ 8052 if ((chk->send_size < (int)(mtu - omtu)) || 8053 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 8054 /* 8055 * We probably should glom the mbuf chain 8056 * from the chk->data for control but the 8057 * problem is it becomes yet one more level 8058 * of tracking to do if for some reason 8059 * output fails. Then I have got to 8060 * reconstruct the merged control chain.. el 8061 * yucko.. for now we take the easy way and 8062 * do the copy 8063 */ 8064 /* 8065 * Add an AUTH chunk, if chunk requires it 8066 * save the offset into the chain for AUTH 8067 */ 8068 if ((auth == NULL) && 8069 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8070 stcb->asoc.peer_auth_chunks))) { 8071 outchain = sctp_add_auth_chunk(outchain, 8072 &endoutchain, 8073 &auth, 8074 &auth_offset, 8075 stcb, 8076 chk->rec.chunk_id.id); 8077 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8078 } 8079 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 8080 (int)chk->rec.chunk_id.can_take_data, 8081 chk->send_size, chk->copy_by_ref); 8082 if (outchain == NULL) { 8083 *reason_code = 8; 8084 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8085 return (ENOMEM); 8086 } 8087 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8088 /* update our MTU size */ 8089 if (mtu > (chk->send_size + omtu)) 8090 mtu -= (chk->send_size + omtu); 8091 else 8092 mtu = 0; 8093 to_out += (chk->send_size + omtu); 8094 /* Do clear IP_DF ? */ 8095 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8096 no_fragmentflg = 0; 8097 } 8098 if (chk->rec.chunk_id.can_take_data) 8099 chk->data = NULL; 8100 /* 8101 * set hb flag since we can use these for 8102 * RTO 8103 */ 8104 hbflag = 1; 8105 asconf = 1; 8106 /* 8107 * should sysctl this: don't bundle data 8108 * with ASCONF since it requires AUTH 8109 */ 8110 no_data_chunks = 1; 8111 chk->sent = SCTP_DATAGRAM_SENT; 8112 if (chk->whoTo == NULL) { 8113 chk->whoTo = net; 8114 atomic_add_int(&net->ref_count, 1); 8115 } 8116 chk->snd_count++; 8117 if (mtu == 0) { 8118 /* 8119 * Ok we are out of room but we can 8120 * output without effecting the 8121 * flight size since this little guy 8122 * is a control only packet. 8123 */ 8124 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 8125 /* 8126 * do NOT clear the asconf flag as 8127 * it is used to do appropriate 8128 * source address selection. 8129 */ 8130 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 8131 (struct sockaddr *)&net->ro._l_addr, 8132 outchain, auth_offset, auth, 8133 stcb->asoc.authinfo.active_keyid, 8134 no_fragmentflg, 0, asconf, 8135 inp->sctp_lport, stcb->rport, 8136 htonl(stcb->asoc.peer_vtag), 8137 net->port, NULL, 8138 0, 0, 8139 so_locked))) { 8140 if (error == ENOBUFS) { 8141 asoc->ifp_had_enobuf = 1; 8142 SCTP_STAT_INCR(sctps_lowlevelerr); 8143 } 8144 if (from_where == 0) { 8145 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8146 } 8147 if (*now_filled == 0) { 8148 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8149 *now_filled = 1; 8150 *now = net->last_sent_time; 8151 } else { 8152 net->last_sent_time = *now; 8153 } 8154 hbflag = 0; 8155 /* error, could not output */ 8156 if (error == EHOSTUNREACH) { 8157 /* 8158 * Destination went 8159 * unreachable 8160 * during this send 8161 */ 8162 sctp_move_chunks_from_net(stcb, net); 8163 } 8164 *reason_code = 7; 8165 continue; 8166 } else 8167 asoc->ifp_had_enobuf = 0; 8168 if (*now_filled == 0) { 8169 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8170 *now_filled = 1; 8171 *now = net->last_sent_time; 8172 } else { 8173 net->last_sent_time = *now; 8174 } 8175 hbflag = 0; 8176 /* 8177 * increase the number we sent, if a 8178 * cookie is sent we don't tell them 8179 * any was sent out. 8180 */ 8181 outchain = endoutchain = NULL; 8182 auth = NULL; 8183 auth_offset = 0; 8184 if (!no_out_cnt) 8185 *num_out += ctl_cnt; 8186 /* recalc a clean slate and setup */ 8187 switch (net->ro._l_addr.sa.sa_family) { 8188#ifdef INET 8189 case AF_INET: 8190 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8191 break; 8192#endif 8193#ifdef INET6 8194 case AF_INET6: 8195 mtu = net->mtu - SCTP_MIN_OVERHEAD; 8196 break; 8197#endif 8198 default: 8199 /* TSNH */ 8200 mtu = net->mtu; 8201 break; 8202 } 8203 to_out = 0; 8204 no_fragmentflg = 1; 8205 } 8206 } 8207 } 8208 /************************/ 8209 /* Control transmission */ 8210 /************************/ 8211 /* Now first lets go through the control queue */ 8212 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 8213 if ((sack_goes_to) && 8214 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) && 8215 (chk->whoTo != sack_goes_to)) { 8216 /* 8217 * if we have a sack in queue, and we are 8218 * looking at an ecn echo that is NOT queued 8219 * to where the sack is going.. 8220 */ 8221 if (chk->whoTo == net) { 8222 /* 8223 * Don't transmit it to where its 8224 * going (current net) 8225 */ 8226 continue; 8227 } else if (sack_goes_to == net) { 8228 /* 8229 * But do transmit it to this 8230 * address 8231 */ 8232 goto skip_net_check; 8233 } 8234 } 8235 if (chk->whoTo == NULL) { 8236 if (asoc->alternate == NULL) { 8237 if (asoc->primary_destination != net) { 8238 continue; 8239 } 8240 } else { 8241 if (asoc->alternate != net) { 8242 continue; 8243 } 8244 } 8245 } else { 8246 if (chk->whoTo != net) { 8247 continue; 8248 } 8249 } 8250 skip_net_check: 8251 if (chk->data == NULL) { 8252 continue; 8253 } 8254 if (chk->sent != SCTP_DATAGRAM_UNSENT) { 8255 /* 8256 * It must be unsent. Cookies and ASCONF's 8257 * hang around but there timers will force 8258 * when marked for resend. 8259 */ 8260 continue; 8261 } 8262 /* 8263 * if no AUTH is yet included and this chunk 8264 * requires it, make sure to account for it. We 8265 * don't apply the size until the AUTH chunk is 8266 * actually added below in case there is no room for 8267 * this chunk. NOTE: we overload the use of "omtu" 8268 * here 8269 */ 8270 if ((auth == NULL) && 8271 sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8272 stcb->asoc.peer_auth_chunks)) { 8273 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8274 } else 8275 omtu = 0; 8276 /* Here we do NOT factor the r_mtu */ 8277 if ((chk->send_size <= (int)(mtu - omtu)) || 8278 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 8279 /* 8280 * We probably should glom the mbuf chain 8281 * from the chk->data for control but the 8282 * problem is it becomes yet one more level 8283 * of tracking to do if for some reason 8284 * output fails. Then I have got to 8285 * reconstruct the merged control chain.. el 8286 * yucko.. for now we take the easy way and 8287 * do the copy 8288 */ 8289 /* 8290 * Add an AUTH chunk, if chunk requires it 8291 * save the offset into the chain for AUTH 8292 */ 8293 if ((auth == NULL) && 8294 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8295 stcb->asoc.peer_auth_chunks))) { 8296 outchain = sctp_add_auth_chunk(outchain, 8297 &endoutchain, 8298 &auth, 8299 &auth_offset, 8300 stcb, 8301 chk->rec.chunk_id.id); 8302 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8303 } 8304 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 8305 (int)chk->rec.chunk_id.can_take_data, 8306 chk->send_size, chk->copy_by_ref); 8307 if (outchain == NULL) { 8308 *reason_code = 8; 8309 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8310 return (ENOMEM); 8311 } 8312 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8313 /* update our MTU size */ 8314 if (mtu > (chk->send_size + omtu)) 8315 mtu -= (chk->send_size + omtu); 8316 else 8317 mtu = 0; 8318 to_out += (chk->send_size + omtu); 8319 /* Do clear IP_DF ? */ 8320 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8321 no_fragmentflg = 0; 8322 } 8323 if (chk->rec.chunk_id.can_take_data) 8324 chk->data = NULL; 8325 /* Mark things to be removed, if needed */ 8326 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 8327 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ 8328 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 8329 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 8330 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 8331 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 8332 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 8333 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 8334 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 8335 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 8336 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 8337 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) { 8338 hbflag = 1; 8339 } 8340 /* remove these chunks at the end */ 8341 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 8342 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { 8343 /* turn off the timer */ 8344 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 8345 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 8346 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1); 8347 } 8348 } 8349 ctl_cnt++; 8350 } else { 8351 /* 8352 * Other chunks, since they have 8353 * timers running (i.e. COOKIE) we 8354 * just "trust" that it gets sent or 8355 * retransmitted. 8356 */ 8357 ctl_cnt++; 8358 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 8359 cookie = 1; 8360 no_out_cnt = 1; 8361 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 8362 /* 8363 * Increment ecne send count 8364 * here this means we may be 8365 * over-zealous in our 8366 * counting if the send 8367 * fails, but its the best 8368 * place to do it (we used 8369 * to do it in the queue of 8370 * the chunk, but that did 8371 * not tell how many times 8372 * it was sent. 8373 */ 8374 SCTP_STAT_INCR(sctps_sendecne); 8375 } 8376 chk->sent = SCTP_DATAGRAM_SENT; 8377 if (chk->whoTo == NULL) { 8378 chk->whoTo = net; 8379 atomic_add_int(&net->ref_count, 1); 8380 } 8381 chk->snd_count++; 8382 } 8383 if (mtu == 0) { 8384 /* 8385 * Ok we are out of room but we can 8386 * output without effecting the 8387 * flight size since this little guy 8388 * is a control only packet. 8389 */ 8390 if (asconf) { 8391 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 8392 /* 8393 * do NOT clear the asconf 8394 * flag as it is used to do 8395 * appropriate source 8396 * address selection. 8397 */ 8398 } 8399 if (cookie) { 8400 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 8401 cookie = 0; 8402 } 8403 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 8404 (struct sockaddr *)&net->ro._l_addr, 8405 outchain, 8406 auth_offset, auth, 8407 stcb->asoc.authinfo.active_keyid, 8408 no_fragmentflg, 0, asconf, 8409 inp->sctp_lport, stcb->rport, 8410 htonl(stcb->asoc.peer_vtag), 8411 net->port, NULL, 8412 0, 0, 8413 so_locked))) { 8414 if (error == ENOBUFS) { 8415 asoc->ifp_had_enobuf = 1; 8416 SCTP_STAT_INCR(sctps_lowlevelerr); 8417 } 8418 if (from_where == 0) { 8419 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8420 } 8421 /* error, could not output */ 8422 if (hbflag) { 8423 if (*now_filled == 0) { 8424 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8425 *now_filled = 1; 8426 *now = net->last_sent_time; 8427 } else { 8428 net->last_sent_time = *now; 8429 } 8430 hbflag = 0; 8431 } 8432 if (error == EHOSTUNREACH) { 8433 /* 8434 * Destination went 8435 * unreachable 8436 * during this send 8437 */ 8438 sctp_move_chunks_from_net(stcb, net); 8439 } 8440 *reason_code = 7; 8441 continue; 8442 } else 8443 asoc->ifp_had_enobuf = 0; 8444 /* Only HB or ASCONF advances time */ 8445 if (hbflag) { 8446 if (*now_filled == 0) { 8447 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8448 *now_filled = 1; 8449 *now = net->last_sent_time; 8450 } else { 8451 net->last_sent_time = *now; 8452 } 8453 hbflag = 0; 8454 } 8455 /* 8456 * increase the number we sent, if a 8457 * cookie is sent we don't tell them 8458 * any was sent out. 8459 */ 8460 outchain = endoutchain = NULL; 8461 auth = NULL; 8462 auth_offset = 0; 8463 if (!no_out_cnt) 8464 *num_out += ctl_cnt; 8465 /* recalc a clean slate and setup */ 8466 switch (net->ro._l_addr.sa.sa_family) { 8467#ifdef INET 8468 case AF_INET: 8469 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8470 break; 8471#endif 8472#ifdef INET6 8473 case AF_INET6: 8474 mtu = net->mtu - SCTP_MIN_OVERHEAD; 8475 break; 8476#endif 8477 default: 8478 /* TSNH */ 8479 mtu = net->mtu; 8480 break; 8481 } 8482 to_out = 0; 8483 no_fragmentflg = 1; 8484 } 8485 } 8486 } 8487 /* JRI: if dest is in PF state, do not send data to it */ 8488 if ((asoc->sctp_cmt_on_off > 0) && 8489 (net != stcb->asoc.alternate) && 8490 (net->dest_state & SCTP_ADDR_PF)) { 8491 goto no_data_fill; 8492 } 8493 if (net->flight_size >= net->cwnd) { 8494 goto no_data_fill; 8495 } 8496 if ((asoc->sctp_cmt_on_off > 0) && 8497 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) && 8498 (net->flight_size > max_rwnd_per_dest)) { 8499 goto no_data_fill; 8500 } 8501 /* 8502 * We need a specific accounting for the usage of the send 8503 * buffer. We also need to check the number of messages per 8504 * net. For now, this is better than nothing and it disabled 8505 * by default... 8506 */ 8507 if ((asoc->sctp_cmt_on_off > 0) && 8508 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) && 8509 (max_send_per_dest > 0) && 8510 (net->flight_size > max_send_per_dest)) { 8511 goto no_data_fill; 8512 } 8513 /*********************/ 8514 /* Data transmission */ 8515 /*********************/ 8516 /* 8517 * if AUTH for DATA is required and no AUTH has been added 8518 * yet, account for this in the mtu now... if no data can be 8519 * bundled, this adjustment won't matter anyways since the 8520 * packet will be going out... 8521 */ 8522 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, 8523 stcb->asoc.peer_auth_chunks); 8524 if (data_auth_reqd && (auth == NULL)) { 8525 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8526 } 8527 /* now lets add any data within the MTU constraints */ 8528 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { 8529#ifdef INET 8530 case AF_INET: 8531 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr))) 8532 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr)); 8533 else 8534 omtu = 0; 8535 break; 8536#endif 8537#ifdef INET6 8538 case AF_INET6: 8539 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr))) 8540 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)); 8541 else 8542 omtu = 0; 8543 break; 8544#endif 8545 default: 8546 /* TSNH */ 8547 omtu = 0; 8548 break; 8549 } 8550 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) && 8551 (skip_data_for_this_net == 0)) || 8552 (cookie)) { 8553 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 8554 if (no_data_chunks) { 8555 /* let only control go out */ 8556 *reason_code = 1; 8557 break; 8558 } 8559 if (net->flight_size >= net->cwnd) { 8560 /* skip this net, no room for data */ 8561 *reason_code = 2; 8562 break; 8563 } 8564 if ((chk->whoTo != NULL) && 8565 (chk->whoTo != net)) { 8566 /* Don't send the chunk on this net */ 8567 continue; 8568 } 8569 if (asoc->sctp_cmt_on_off == 0) { 8570 if ((asoc->alternate) && 8571 (asoc->alternate != net) && 8572 (chk->whoTo == NULL)) { 8573 continue; 8574 } else if ((net != asoc->primary_destination) && 8575 (asoc->alternate == NULL) && 8576 (chk->whoTo == NULL)) { 8577 continue; 8578 } 8579 } 8580 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) { 8581 /*- 8582 * strange, we have a chunk that is 8583 * to big for its destination and 8584 * yet no fragment ok flag. 8585 * Something went wrong when the 8586 * PMTU changed...we did not mark 8587 * this chunk for some reason?? I 8588 * will fix it here by letting IP 8589 * fragment it for now and printing 8590 * a warning. This really should not 8591 * happen ... 8592 */ 8593 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n", 8594 chk->send_size, mtu); 8595 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 8596 } 8597 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && 8598 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) { 8599 struct sctp_data_chunk *dchkh; 8600 8601 dchkh = mtod(chk->data, struct sctp_data_chunk *); 8602 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY; 8603 } 8604 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) || 8605 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) { 8606 /* ok we will add this one */ 8607 8608 /* 8609 * Add an AUTH chunk, if chunk 8610 * requires it, save the offset into 8611 * the chain for AUTH 8612 */ 8613 if (data_auth_reqd) { 8614 if (auth == NULL) { 8615 outchain = sctp_add_auth_chunk(outchain, 8616 &endoutchain, 8617 &auth, 8618 &auth_offset, 8619 stcb, 8620 SCTP_DATA); 8621 auth_keyid = chk->auth_keyid; 8622 override_ok = 0; 8623 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8624 } else if (override_ok) { 8625 /* 8626 * use this data's 8627 * keyid 8628 */ 8629 auth_keyid = chk->auth_keyid; 8630 override_ok = 0; 8631 } else if (auth_keyid != chk->auth_keyid) { 8632 /* 8633 * different keyid, 8634 * so done bundling 8635 */ 8636 break; 8637 } 8638 } 8639 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0, 8640 chk->send_size, chk->copy_by_ref); 8641 if (outchain == NULL) { 8642 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n"); 8643 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 8644 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8645 } 8646 *reason_code = 3; 8647 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8648 return (ENOMEM); 8649 } 8650 /* upate our MTU size */ 8651 /* Do clear IP_DF ? */ 8652 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8653 no_fragmentflg = 0; 8654 } 8655 /* unsigned subtraction of mtu */ 8656 if (mtu > chk->send_size) 8657 mtu -= chk->send_size; 8658 else 8659 mtu = 0; 8660 /* unsigned subtraction of r_mtu */ 8661 if (r_mtu > chk->send_size) 8662 r_mtu -= chk->send_size; 8663 else 8664 r_mtu = 0; 8665 8666 to_out += chk->send_size; 8667 if ((to_out > mx_mtu) && no_fragmentflg) { 8668#ifdef INVARIANTS 8669 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out); 8670#else 8671 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n", 8672 mx_mtu, to_out); 8673#endif 8674 } 8675 chk->window_probe = 0; 8676 data_list[bundle_at++] = chk; 8677 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 8678 break; 8679 } 8680 if (chk->sent == SCTP_DATAGRAM_UNSENT) { 8681 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) { 8682 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks); 8683 } else { 8684 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks); 8685 } 8686 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) && 8687 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0)) 8688 /* 8689 * Count number of 8690 * user msg's that 8691 * were fragmented 8692 * we do this by 8693 * counting when we 8694 * see a LAST 8695 * fragment only. 8696 */ 8697 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs); 8698 } 8699 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) { 8700 if ((one_chunk) && (stcb->asoc.total_flight == 0)) { 8701 data_list[0]->window_probe = 1; 8702 net->window_probe = 1; 8703 } 8704 break; 8705 } 8706 } else { 8707 /* 8708 * Must be sent in order of the 8709 * TSN's (on a network) 8710 */ 8711 break; 8712 } 8713 } /* for (chunk gather loop for this net) */ 8714 } /* if asoc.state OPEN */ 8715no_data_fill: 8716 /* Is there something to send for this destination? */ 8717 if (outchain) { 8718 /* We may need to start a control timer or two */ 8719 if (asconf) { 8720 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 8721 stcb, net); 8722 /* 8723 * do NOT clear the asconf flag as it is 8724 * used to do appropriate source address 8725 * selection. 8726 */ 8727 } 8728 if (cookie) { 8729 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 8730 cookie = 0; 8731 } 8732 /* must start a send timer if data is being sent */ 8733 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) { 8734 /* 8735 * no timer running on this destination 8736 * restart it. 8737 */ 8738 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8739 } 8740 /* Now send it, if there is anything to send :> */ 8741 if ((error = sctp_lowlevel_chunk_output(inp, 8742 stcb, 8743 net, 8744 (struct sockaddr *)&net->ro._l_addr, 8745 outchain, 8746 auth_offset, 8747 auth, 8748 auth_keyid, 8749 no_fragmentflg, 8750 bundle_at, 8751 asconf, 8752 inp->sctp_lport, stcb->rport, 8753 htonl(stcb->asoc.peer_vtag), 8754 net->port, NULL, 8755 0, 0, 8756 so_locked))) { 8757 /* error, we could not output */ 8758 if (error == ENOBUFS) { 8759 SCTP_STAT_INCR(sctps_lowlevelerr); 8760 asoc->ifp_had_enobuf = 1; 8761 } 8762 if (from_where == 0) { 8763 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8764 } 8765 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error); 8766 if (hbflag) { 8767 if (*now_filled == 0) { 8768 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8769 *now_filled = 1; 8770 *now = net->last_sent_time; 8771 } else { 8772 net->last_sent_time = *now; 8773 } 8774 hbflag = 0; 8775 } 8776 if (error == EHOSTUNREACH) { 8777 /* 8778 * Destination went unreachable 8779 * during this send 8780 */ 8781 sctp_move_chunks_from_net(stcb, net); 8782 } 8783 *reason_code = 6; 8784 /*- 8785 * I add this line to be paranoid. As far as 8786 * I can tell the continue, takes us back to 8787 * the top of the for, but just to make sure 8788 * I will reset these again here. 8789 */ 8790 ctl_cnt = bundle_at = 0; 8791 continue; /* This takes us back to the 8792 * for() for the nets. */ 8793 } else { 8794 asoc->ifp_had_enobuf = 0; 8795 } 8796 endoutchain = NULL; 8797 auth = NULL; 8798 auth_offset = 0; 8799 if (bundle_at || hbflag) { 8800 /* For data/asconf and hb set time */ 8801 if (*now_filled == 0) { 8802 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8803 *now_filled = 1; 8804 *now = net->last_sent_time; 8805 } else { 8806 net->last_sent_time = *now; 8807 } 8808 } 8809 if (!no_out_cnt) { 8810 *num_out += (ctl_cnt + bundle_at); 8811 } 8812 if (bundle_at) { 8813 /* setup for a RTO measurement */ 8814 tsns_sent = data_list[0]->rec.data.TSN_seq; 8815 /* fill time if not already filled */ 8816 if (*now_filled == 0) { 8817 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); 8818 *now_filled = 1; 8819 *now = asoc->time_last_sent; 8820 } else { 8821 asoc->time_last_sent = *now; 8822 } 8823 if (net->rto_needed) { 8824 data_list[0]->do_rtt = 1; 8825 net->rto_needed = 0; 8826 } 8827 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at); 8828 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net); 8829 } 8830 if (one_chunk) { 8831 break; 8832 } 8833 } 8834 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 8835 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND); 8836 } 8837 } 8838 if (old_start_at == NULL) { 8839 old_start_at = start_at; 8840 start_at = TAILQ_FIRST(&asoc->nets); 8841 if (old_start_at) 8842 goto again_one_more_time; 8843 } 8844 /* 8845 * At the end there should be no NON timed chunks hanging on this 8846 * queue. 8847 */ 8848 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 8849 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND); 8850 } 8851 if ((*num_out == 0) && (*reason_code == 0)) { 8852 *reason_code = 4; 8853 } else { 8854 *reason_code = 5; 8855 } 8856 sctp_clean_up_ctl(stcb, asoc, so_locked); 8857 return (0); 8858} 8859 8860void 8861sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err) 8862{ 8863 /*- 8864 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of 8865 * the control chunk queue. 8866 */ 8867 struct sctp_chunkhdr *hdr; 8868 struct sctp_tmit_chunk *chk; 8869 struct mbuf *mat; 8870 8871 SCTP_TCB_LOCK_ASSERT(stcb); 8872 sctp_alloc_a_chunk(stcb, chk); 8873 if (chk == NULL) { 8874 /* no memory */ 8875 sctp_m_freem(op_err); 8876 return; 8877 } 8878 chk->copy_by_ref = 0; 8879 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT); 8880 if (op_err == NULL) { 8881 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 8882 return; 8883 } 8884 chk->send_size = 0; 8885 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) { 8886 chk->send_size += SCTP_BUF_LEN(mat); 8887 } 8888 chk->sent = SCTP_DATAGRAM_UNSENT; 8889 chk->snd_count = 0; 8890 chk->asoc = &stcb->asoc; 8891 chk->data = op_err; 8892 chk->whoTo = NULL; 8893 hdr = mtod(op_err, struct sctp_chunkhdr *); 8894 hdr->chunk_type = SCTP_OPERATION_ERROR; 8895 hdr->chunk_flags = 0; 8896 hdr->chunk_length = htons(chk->send_size); 8897 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, 8898 chk, 8899 sctp_next); 8900 chk->asoc->ctrl_queue_cnt++; 8901} 8902 8903int 8904sctp_send_cookie_echo(struct mbuf *m, 8905 int offset, 8906 struct sctp_tcb *stcb, 8907 struct sctp_nets *net) 8908{ 8909 /*- 8910 * pull out the cookie and put it at the front of the control chunk 8911 * queue. 8912 */ 8913 int at; 8914 struct mbuf *cookie; 8915 struct sctp_paramhdr parm, *phdr; 8916 struct sctp_chunkhdr *hdr; 8917 struct sctp_tmit_chunk *chk; 8918 uint16_t ptype, plen; 8919 8920 /* First find the cookie in the param area */ 8921 cookie = NULL; 8922 at = offset + sizeof(struct sctp_init_chunk); 8923 8924 SCTP_TCB_LOCK_ASSERT(stcb); 8925 do { 8926 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm)); 8927 if (phdr == NULL) { 8928 return (-3); 8929 } 8930 ptype = ntohs(phdr->param_type); 8931 plen = ntohs(phdr->param_length); 8932 if (ptype == SCTP_STATE_COOKIE) { 8933 int pad; 8934 8935 /* found the cookie */ 8936 if ((pad = (plen % 4))) { 8937 plen += 4 - pad; 8938 } 8939 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT); 8940 if (cookie == NULL) { 8941 /* No memory */ 8942 return (-2); 8943 } 8944#ifdef SCTP_MBUF_LOGGING 8945 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 8946 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY); 8947 } 8948#endif 8949 break; 8950 } 8951 at += SCTP_SIZE32(plen); 8952 } while (phdr); 8953 if (cookie == NULL) { 8954 /* Did not find the cookie */ 8955 return (-3); 8956 } 8957 /* ok, we got the cookie lets change it into a cookie echo chunk */ 8958 8959 /* first the change from param to cookie */ 8960 hdr = mtod(cookie, struct sctp_chunkhdr *); 8961 hdr->chunk_type = SCTP_COOKIE_ECHO; 8962 hdr->chunk_flags = 0; 8963 /* get the chunk stuff now and place it in the FRONT of the queue */ 8964 sctp_alloc_a_chunk(stcb, chk); 8965 if (chk == NULL) { 8966 /* no memory */ 8967 sctp_m_freem(cookie); 8968 return (-5); 8969 } 8970 chk->copy_by_ref = 0; 8971 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO; 8972 chk->rec.chunk_id.can_take_data = 0; 8973 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 8974 chk->send_size = plen; 8975 chk->sent = SCTP_DATAGRAM_UNSENT; 8976 chk->snd_count = 0; 8977 chk->asoc = &stcb->asoc; 8978 chk->data = cookie; 8979 chk->whoTo = net; 8980 atomic_add_int(&chk->whoTo->ref_count, 1); 8981 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next); 8982 chk->asoc->ctrl_queue_cnt++; 8983 return (0); 8984} 8985 8986void 8987sctp_send_heartbeat_ack(struct sctp_tcb *stcb, 8988 struct mbuf *m, 8989 int offset, 8990 int chk_length, 8991 struct sctp_nets *net) 8992{ 8993 /* 8994 * take a HB request and make it into a HB ack and send it. 8995 */ 8996 struct mbuf *outchain; 8997 struct sctp_chunkhdr *chdr; 8998 struct sctp_tmit_chunk *chk; 8999 9000 9001 if (net == NULL) 9002 /* must have a net pointer */ 9003 return; 9004 9005 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT); 9006 if (outchain == NULL) { 9007 /* gak out of memory */ 9008 return; 9009 } 9010#ifdef SCTP_MBUF_LOGGING 9011 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 9012 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY); 9013 } 9014#endif 9015 chdr = mtod(outchain, struct sctp_chunkhdr *); 9016 chdr->chunk_type = SCTP_HEARTBEAT_ACK; 9017 chdr->chunk_flags = 0; 9018 if (chk_length % 4) { 9019 /* need pad */ 9020 uint32_t cpthis = 0; 9021 int padlen; 9022 9023 padlen = 4 - (chk_length % 4); 9024 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis); 9025 } 9026 sctp_alloc_a_chunk(stcb, chk); 9027 if (chk == NULL) { 9028 /* no memory */ 9029 sctp_m_freem(outchain); 9030 return; 9031 } 9032 chk->copy_by_ref = 0; 9033 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK; 9034 chk->rec.chunk_id.can_take_data = 1; 9035 chk->flags = 0; 9036 chk->send_size = chk_length; 9037 chk->sent = SCTP_DATAGRAM_UNSENT; 9038 chk->snd_count = 0; 9039 chk->asoc = &stcb->asoc; 9040 chk->data = outchain; 9041 chk->whoTo = net; 9042 atomic_add_int(&chk->whoTo->ref_count, 1); 9043 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9044 chk->asoc->ctrl_queue_cnt++; 9045} 9046 9047void 9048sctp_send_cookie_ack(struct sctp_tcb *stcb) 9049{ 9050 /* formulate and queue a cookie-ack back to sender */ 9051 struct mbuf *cookie_ack; 9052 struct sctp_chunkhdr *hdr; 9053 struct sctp_tmit_chunk *chk; 9054 9055 SCTP_TCB_LOCK_ASSERT(stcb); 9056 9057 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER); 9058 if (cookie_ack == NULL) { 9059 /* no mbuf's */ 9060 return; 9061 } 9062 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD); 9063 sctp_alloc_a_chunk(stcb, chk); 9064 if (chk == NULL) { 9065 /* no memory */ 9066 sctp_m_freem(cookie_ack); 9067 return; 9068 } 9069 chk->copy_by_ref = 0; 9070 chk->rec.chunk_id.id = SCTP_COOKIE_ACK; 9071 chk->rec.chunk_id.can_take_data = 1; 9072 chk->flags = 0; 9073 chk->send_size = sizeof(struct sctp_chunkhdr); 9074 chk->sent = SCTP_DATAGRAM_UNSENT; 9075 chk->snd_count = 0; 9076 chk->asoc = &stcb->asoc; 9077 chk->data = cookie_ack; 9078 if (chk->asoc->last_control_chunk_from != NULL) { 9079 chk->whoTo = chk->asoc->last_control_chunk_from; 9080 atomic_add_int(&chk->whoTo->ref_count, 1); 9081 } else { 9082 chk->whoTo = NULL; 9083 } 9084 hdr = mtod(cookie_ack, struct sctp_chunkhdr *); 9085 hdr->chunk_type = SCTP_COOKIE_ACK; 9086 hdr->chunk_flags = 0; 9087 hdr->chunk_length = htons(chk->send_size); 9088 SCTP_BUF_LEN(cookie_ack) = chk->send_size; 9089 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9090 chk->asoc->ctrl_queue_cnt++; 9091 return; 9092} 9093 9094 9095void 9096sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net) 9097{ 9098 /* formulate and queue a SHUTDOWN-ACK back to the sender */ 9099 struct mbuf *m_shutdown_ack; 9100 struct sctp_shutdown_ack_chunk *ack_cp; 9101 struct sctp_tmit_chunk *chk; 9102 9103 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER); 9104 if (m_shutdown_ack == NULL) { 9105 /* no mbuf's */ 9106 return; 9107 } 9108 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD); 9109 sctp_alloc_a_chunk(stcb, chk); 9110 if (chk == NULL) { 9111 /* no memory */ 9112 sctp_m_freem(m_shutdown_ack); 9113 return; 9114 } 9115 chk->copy_by_ref = 0; 9116 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK; 9117 chk->rec.chunk_id.can_take_data = 1; 9118 chk->flags = 0; 9119 chk->send_size = sizeof(struct sctp_chunkhdr); 9120 chk->sent = SCTP_DATAGRAM_UNSENT; 9121 chk->snd_count = 0; 9122 chk->flags = 0; 9123 chk->asoc = &stcb->asoc; 9124 chk->data = m_shutdown_ack; 9125 chk->whoTo = net; 9126 if (chk->whoTo) { 9127 atomic_add_int(&chk->whoTo->ref_count, 1); 9128 } 9129 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *); 9130 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK; 9131 ack_cp->ch.chunk_flags = 0; 9132 ack_cp->ch.chunk_length = htons(chk->send_size); 9133 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size; 9134 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9135 chk->asoc->ctrl_queue_cnt++; 9136 return; 9137} 9138 9139void 9140sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net) 9141{ 9142 /* formulate and queue a SHUTDOWN to the sender */ 9143 struct mbuf *m_shutdown; 9144 struct sctp_shutdown_chunk *shutdown_cp; 9145 struct sctp_tmit_chunk *chk; 9146 9147 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER); 9148 if (m_shutdown == NULL) { 9149 /* no mbuf's */ 9150 return; 9151 } 9152 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD); 9153 sctp_alloc_a_chunk(stcb, chk); 9154 if (chk == NULL) { 9155 /* no memory */ 9156 sctp_m_freem(m_shutdown); 9157 return; 9158 } 9159 chk->copy_by_ref = 0; 9160 chk->rec.chunk_id.id = SCTP_SHUTDOWN; 9161 chk->rec.chunk_id.can_take_data = 1; 9162 chk->flags = 0; 9163 chk->send_size = sizeof(struct sctp_shutdown_chunk); 9164 chk->sent = SCTP_DATAGRAM_UNSENT; 9165 chk->snd_count = 0; 9166 chk->flags = 0; 9167 chk->asoc = &stcb->asoc; 9168 chk->data = m_shutdown; 9169 chk->whoTo = net; 9170 if (chk->whoTo) { 9171 atomic_add_int(&chk->whoTo->ref_count, 1); 9172 } 9173 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *); 9174 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN; 9175 shutdown_cp->ch.chunk_flags = 0; 9176 shutdown_cp->ch.chunk_length = htons(chk->send_size); 9177 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn); 9178 SCTP_BUF_LEN(m_shutdown) = chk->send_size; 9179 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9180 chk->asoc->ctrl_queue_cnt++; 9181 return; 9182} 9183 9184void 9185sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked) 9186{ 9187 /* 9188 * formulate and queue an ASCONF to the peer. ASCONF parameters 9189 * should be queued on the assoc queue. 9190 */ 9191 struct sctp_tmit_chunk *chk; 9192 struct mbuf *m_asconf; 9193 int len; 9194 9195 SCTP_TCB_LOCK_ASSERT(stcb); 9196 9197 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) && 9198 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) { 9199 /* can't send a new one if there is one in flight already */ 9200 return; 9201 } 9202 /* compose an ASCONF chunk, maximum length is PMTU */ 9203 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked); 9204 if (m_asconf == NULL) { 9205 return; 9206 } 9207 sctp_alloc_a_chunk(stcb, chk); 9208 if (chk == NULL) { 9209 /* no memory */ 9210 sctp_m_freem(m_asconf); 9211 return; 9212 } 9213 chk->copy_by_ref = 0; 9214 chk->rec.chunk_id.id = SCTP_ASCONF; 9215 chk->rec.chunk_id.can_take_data = 0; 9216 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 9217 chk->data = m_asconf; 9218 chk->send_size = len; 9219 chk->sent = SCTP_DATAGRAM_UNSENT; 9220 chk->snd_count = 0; 9221 chk->asoc = &stcb->asoc; 9222 chk->whoTo = net; 9223 if (chk->whoTo) { 9224 atomic_add_int(&chk->whoTo->ref_count, 1); 9225 } 9226 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next); 9227 chk->asoc->ctrl_queue_cnt++; 9228 return; 9229} 9230 9231void 9232sctp_send_asconf_ack(struct sctp_tcb *stcb) 9233{ 9234 /* 9235 * formulate and queue a asconf-ack back to sender. the asconf-ack 9236 * must be stored in the tcb. 9237 */ 9238 struct sctp_tmit_chunk *chk; 9239 struct sctp_asconf_ack *ack, *latest_ack; 9240 struct mbuf *m_ack; 9241 struct sctp_nets *net = NULL; 9242 9243 SCTP_TCB_LOCK_ASSERT(stcb); 9244 /* Get the latest ASCONF-ACK */ 9245 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead); 9246 if (latest_ack == NULL) { 9247 return; 9248 } 9249 if (latest_ack->last_sent_to != NULL && 9250 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) { 9251 /* we're doing a retransmission */ 9252 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0); 9253 if (net == NULL) { 9254 /* no alternate */ 9255 if (stcb->asoc.last_control_chunk_from == NULL) { 9256 if (stcb->asoc.alternate) { 9257 net = stcb->asoc.alternate; 9258 } else { 9259 net = stcb->asoc.primary_destination; 9260 } 9261 } else { 9262 net = stcb->asoc.last_control_chunk_from; 9263 } 9264 } 9265 } else { 9266 /* normal case */ 9267 if (stcb->asoc.last_control_chunk_from == NULL) { 9268 if (stcb->asoc.alternate) { 9269 net = stcb->asoc.alternate; 9270 } else { 9271 net = stcb->asoc.primary_destination; 9272 } 9273 } else { 9274 net = stcb->asoc.last_control_chunk_from; 9275 } 9276 } 9277 latest_ack->last_sent_to = net; 9278 9279 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) { 9280 if (ack->data == NULL) { 9281 continue; 9282 } 9283 /* copy the asconf_ack */ 9284 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT); 9285 if (m_ack == NULL) { 9286 /* couldn't copy it */ 9287 return; 9288 } 9289#ifdef SCTP_MBUF_LOGGING 9290 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 9291 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY); 9292 } 9293#endif 9294 9295 sctp_alloc_a_chunk(stcb, chk); 9296 if (chk == NULL) { 9297 /* no memory */ 9298 if (m_ack) 9299 sctp_m_freem(m_ack); 9300 return; 9301 } 9302 chk->copy_by_ref = 0; 9303 chk->rec.chunk_id.id = SCTP_ASCONF_ACK; 9304 chk->rec.chunk_id.can_take_data = 1; 9305 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 9306 chk->whoTo = net; 9307 if (chk->whoTo) { 9308 atomic_add_int(&chk->whoTo->ref_count, 1); 9309 } 9310 chk->data = m_ack; 9311 chk->send_size = 0; 9312 /* Get size */ 9313 chk->send_size = ack->len; 9314 chk->sent = SCTP_DATAGRAM_UNSENT; 9315 chk->snd_count = 0; 9316 chk->asoc = &stcb->asoc; 9317 9318 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9319 chk->asoc->ctrl_queue_cnt++; 9320 } 9321 return; 9322} 9323 9324 9325static int 9326sctp_chunk_retransmission(struct sctp_inpcb *inp, 9327 struct sctp_tcb *stcb, 9328 struct sctp_association *asoc, 9329 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked 9330#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 9331 SCTP_UNUSED 9332#endif 9333) 9334{ 9335 /*- 9336 * send out one MTU of retransmission. If fast_retransmit is 9337 * happening we ignore the cwnd. Otherwise we obey the cwnd and 9338 * rwnd. For a Cookie or Asconf in the control chunk queue we 9339 * retransmit them by themselves. 9340 * 9341 * For data chunks we will pick out the lowest TSN's in the sent_queue 9342 * marked for resend and bundle them all together (up to a MTU of 9343 * destination). The address to send to should have been 9344 * selected/changed where the retransmission was marked (i.e. in FR 9345 * or t3-timeout routines). 9346 */ 9347 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 9348 struct sctp_tmit_chunk *chk, *fwd; 9349 struct mbuf *m, *endofchain; 9350 struct sctp_nets *net = NULL; 9351 uint32_t tsns_sent = 0; 9352 int no_fragmentflg, bundle_at, cnt_thru; 9353 unsigned int mtu; 9354 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started; 9355 struct sctp_auth_chunk *auth = NULL; 9356 uint32_t auth_offset = 0; 9357 uint16_t auth_keyid; 9358 int override_ok = 1; 9359 int data_auth_reqd = 0; 9360 uint32_t dmtu = 0; 9361 9362 SCTP_TCB_LOCK_ASSERT(stcb); 9363 tmr_started = ctl_cnt = bundle_at = error = 0; 9364 no_fragmentflg = 1; 9365 fwd_tsn = 0; 9366 *cnt_out = 0; 9367 fwd = NULL; 9368 endofchain = m = NULL; 9369 auth_keyid = stcb->asoc.authinfo.active_keyid; 9370#ifdef SCTP_AUDITING_ENABLED 9371 sctp_audit_log(0xC3, 1); 9372#endif 9373 if ((TAILQ_EMPTY(&asoc->sent_queue)) && 9374 (TAILQ_EMPTY(&asoc->control_send_queue))) { 9375 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n", 9376 asoc->sent_queue_retran_cnt); 9377 asoc->sent_queue_cnt = 0; 9378 asoc->sent_queue_cnt_removeable = 0; 9379 /* send back 0/0 so we enter normal transmission */ 9380 *cnt_out = 0; 9381 return (0); 9382 } 9383 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 9384 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) || 9385 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) || 9386 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) { 9387 if (chk->sent != SCTP_DATAGRAM_RESEND) { 9388 continue; 9389 } 9390 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 9391 if (chk != asoc->str_reset) { 9392 /* 9393 * not eligible for retran if its 9394 * not ours 9395 */ 9396 continue; 9397 } 9398 } 9399 ctl_cnt++; 9400 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 9401 fwd_tsn = 1; 9402 } 9403 /* 9404 * Add an AUTH chunk, if chunk requires it save the 9405 * offset into the chain for AUTH 9406 */ 9407 if ((auth == NULL) && 9408 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 9409 stcb->asoc.peer_auth_chunks))) { 9410 m = sctp_add_auth_chunk(m, &endofchain, 9411 &auth, &auth_offset, 9412 stcb, 9413 chk->rec.chunk_id.id); 9414 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9415 } 9416 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 9417 break; 9418 } 9419 } 9420 one_chunk = 0; 9421 cnt_thru = 0; 9422 /* do we have control chunks to retransmit? */ 9423 if (m != NULL) { 9424 /* Start a timer no matter if we suceed or fail */ 9425 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 9426 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo); 9427 } else if (chk->rec.chunk_id.id == SCTP_ASCONF) 9428 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo); 9429 chk->snd_count++; /* update our count */ 9430 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo, 9431 (struct sockaddr *)&chk->whoTo->ro._l_addr, m, 9432 auth_offset, auth, stcb->asoc.authinfo.active_keyid, 9433 no_fragmentflg, 0, 0, 9434 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), 9435 chk->whoTo->port, NULL, 9436 0, 0, 9437 so_locked))) { 9438 SCTP_STAT_INCR(sctps_lowlevelerr); 9439 return (error); 9440 } 9441 endofchain = NULL; 9442 auth = NULL; 9443 auth_offset = 0; 9444 /* 9445 * We don't want to mark the net->sent time here since this 9446 * we use this for HB and retrans cannot measure RTT 9447 */ 9448 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */ 9449 *cnt_out += 1; 9450 chk->sent = SCTP_DATAGRAM_SENT; 9451 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt); 9452 if (fwd_tsn == 0) { 9453 return (0); 9454 } else { 9455 /* Clean up the fwd-tsn list */ 9456 sctp_clean_up_ctl(stcb, asoc, so_locked); 9457 return (0); 9458 } 9459 } 9460 /* 9461 * Ok, it is just data retransmission we need to do or that and a 9462 * fwd-tsn with it all. 9463 */ 9464 if (TAILQ_EMPTY(&asoc->sent_queue)) { 9465 return (SCTP_RETRAN_DONE); 9466 } 9467 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) || 9468 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) { 9469 /* not yet open, resend the cookie and that is it */ 9470 return (1); 9471 } 9472#ifdef SCTP_AUDITING_ENABLED 9473 sctp_auditing(20, inp, stcb, NULL); 9474#endif 9475 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks); 9476 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 9477 if (chk->sent != SCTP_DATAGRAM_RESEND) { 9478 /* No, not sent to this net or not ready for rtx */ 9479 continue; 9480 } 9481 if (chk->data == NULL) { 9482 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n", 9483 chk->rec.data.TSN_seq, chk->snd_count, chk->sent); 9484 continue; 9485 } 9486 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) && 9487 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) { 9488 /* Gak, we have exceeded max unlucky retran, abort! */ 9489 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n", 9490 chk->snd_count, 9491 SCTP_BASE_SYSCTL(sctp_max_retran_chunk)); 9492 atomic_add_int(&stcb->asoc.refcnt, 1); 9493 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked); 9494 SCTP_TCB_LOCK(stcb); 9495 atomic_subtract_int(&stcb->asoc.refcnt, 1); 9496 return (SCTP_RETRAN_EXIT); 9497 } 9498 /* pick up the net */ 9499 net = chk->whoTo; 9500 switch (net->ro._l_addr.sa.sa_family) { 9501#ifdef INET 9502 case AF_INET: 9503 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 9504 break; 9505#endif 9506#ifdef INET6 9507 case AF_INET6: 9508 mtu = net->mtu - SCTP_MIN_OVERHEAD; 9509 break; 9510#endif 9511 default: 9512 /* TSNH */ 9513 mtu = net->mtu; 9514 break; 9515 } 9516 9517 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) { 9518 /* No room in peers rwnd */ 9519 uint32_t tsn; 9520 9521 tsn = asoc->last_acked_seq + 1; 9522 if (tsn == chk->rec.data.TSN_seq) { 9523 /* 9524 * we make a special exception for this 9525 * case. The peer has no rwnd but is missing 9526 * the lowest chunk.. which is probably what 9527 * is holding up the rwnd. 9528 */ 9529 goto one_chunk_around; 9530 } 9531 return (1); 9532 } 9533one_chunk_around: 9534 if (asoc->peers_rwnd < mtu) { 9535 one_chunk = 1; 9536 if ((asoc->peers_rwnd == 0) && 9537 (asoc->total_flight == 0)) { 9538 chk->window_probe = 1; 9539 chk->whoTo->window_probe = 1; 9540 } 9541 } 9542#ifdef SCTP_AUDITING_ENABLED 9543 sctp_audit_log(0xC3, 2); 9544#endif 9545 bundle_at = 0; 9546 m = NULL; 9547 net->fast_retran_ip = 0; 9548 if (chk->rec.data.doing_fast_retransmit == 0) { 9549 /* 9550 * if no FR in progress skip destination that have 9551 * flight_size > cwnd. 9552 */ 9553 if (net->flight_size >= net->cwnd) { 9554 continue; 9555 } 9556 } else { 9557 /* 9558 * Mark the destination net to have FR recovery 9559 * limits put on it. 9560 */ 9561 *fr_done = 1; 9562 net->fast_retran_ip = 1; 9563 } 9564 9565 /* 9566 * if no AUTH is yet included and this chunk requires it, 9567 * make sure to account for it. We don't apply the size 9568 * until the AUTH chunk is actually added below in case 9569 * there is no room for this chunk. 9570 */ 9571 if (data_auth_reqd && (auth == NULL)) { 9572 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 9573 } else 9574 dmtu = 0; 9575 9576 if ((chk->send_size <= (mtu - dmtu)) || 9577 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 9578 /* ok we will add this one */ 9579 if (data_auth_reqd) { 9580 if (auth == NULL) { 9581 m = sctp_add_auth_chunk(m, 9582 &endofchain, 9583 &auth, 9584 &auth_offset, 9585 stcb, 9586 SCTP_DATA); 9587 auth_keyid = chk->auth_keyid; 9588 override_ok = 0; 9589 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9590 } else if (override_ok) { 9591 auth_keyid = chk->auth_keyid; 9592 override_ok = 0; 9593 } else if (chk->auth_keyid != auth_keyid) { 9594 /* different keyid, so done bundling */ 9595 break; 9596 } 9597 } 9598 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 9599 if (m == NULL) { 9600 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 9601 return (ENOMEM); 9602 } 9603 /* Do clear IP_DF ? */ 9604 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 9605 no_fragmentflg = 0; 9606 } 9607 /* upate our MTU size */ 9608 if (mtu > (chk->send_size + dmtu)) 9609 mtu -= (chk->send_size + dmtu); 9610 else 9611 mtu = 0; 9612 data_list[bundle_at++] = chk; 9613 if (one_chunk && (asoc->total_flight <= 0)) { 9614 SCTP_STAT_INCR(sctps_windowprobed); 9615 } 9616 } 9617 if (one_chunk == 0) { 9618 /* 9619 * now are there anymore forward from chk to pick 9620 * up? 9621 */ 9622 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) { 9623 if (fwd->sent != SCTP_DATAGRAM_RESEND) { 9624 /* Nope, not for retran */ 9625 continue; 9626 } 9627 if (fwd->whoTo != net) { 9628 /* Nope, not the net in question */ 9629 continue; 9630 } 9631 if (data_auth_reqd && (auth == NULL)) { 9632 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 9633 } else 9634 dmtu = 0; 9635 if (fwd->send_size <= (mtu - dmtu)) { 9636 if (data_auth_reqd) { 9637 if (auth == NULL) { 9638 m = sctp_add_auth_chunk(m, 9639 &endofchain, 9640 &auth, 9641 &auth_offset, 9642 stcb, 9643 SCTP_DATA); 9644 auth_keyid = fwd->auth_keyid; 9645 override_ok = 0; 9646 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9647 } else if (override_ok) { 9648 auth_keyid = fwd->auth_keyid; 9649 override_ok = 0; 9650 } else if (fwd->auth_keyid != auth_keyid) { 9651 /* 9652 * different keyid, 9653 * so done bundling 9654 */ 9655 break; 9656 } 9657 } 9658 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref); 9659 if (m == NULL) { 9660 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 9661 return (ENOMEM); 9662 } 9663 /* Do clear IP_DF ? */ 9664 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) { 9665 no_fragmentflg = 0; 9666 } 9667 /* upate our MTU size */ 9668 if (mtu > (fwd->send_size + dmtu)) 9669 mtu -= (fwd->send_size + dmtu); 9670 else 9671 mtu = 0; 9672 data_list[bundle_at++] = fwd; 9673 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 9674 break; 9675 } 9676 } else { 9677 /* can't fit so we are done */ 9678 break; 9679 } 9680 } 9681 } 9682 /* Is there something to send for this destination? */ 9683 if (m) { 9684 /* 9685 * No matter if we fail/or suceed we should start a 9686 * timer. A failure is like a lost IP packet :-) 9687 */ 9688 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 9689 /* 9690 * no timer running on this destination 9691 * restart it. 9692 */ 9693 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 9694 tmr_started = 1; 9695 } 9696 /* Now lets send it, if there is anything to send :> */ 9697 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 9698 (struct sockaddr *)&net->ro._l_addr, m, 9699 auth_offset, auth, auth_keyid, 9700 no_fragmentflg, 0, 0, 9701 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), 9702 net->port, NULL, 9703 0, 0, 9704 so_locked))) { 9705 /* error, we could not output */ 9706 SCTP_STAT_INCR(sctps_lowlevelerr); 9707 return (error); 9708 } 9709 endofchain = NULL; 9710 auth = NULL; 9711 auth_offset = 0; 9712 /* For HB's */ 9713 /* 9714 * We don't want to mark the net->sent time here 9715 * since this we use this for HB and retrans cannot 9716 * measure RTT 9717 */ 9718 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */ 9719 9720 /* For auto-close */ 9721 cnt_thru++; 9722 if (*now_filled == 0) { 9723 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); 9724 *now = asoc->time_last_sent; 9725 *now_filled = 1; 9726 } else { 9727 asoc->time_last_sent = *now; 9728 } 9729 *cnt_out += bundle_at; 9730#ifdef SCTP_AUDITING_ENABLED 9731 sctp_audit_log(0xC4, bundle_at); 9732#endif 9733 if (bundle_at) { 9734 tsns_sent = data_list[0]->rec.data.TSN_seq; 9735 } 9736 for (i = 0; i < bundle_at; i++) { 9737 SCTP_STAT_INCR(sctps_sendretransdata); 9738 data_list[i]->sent = SCTP_DATAGRAM_SENT; 9739 /* 9740 * When we have a revoked data, and we 9741 * retransmit it, then we clear the revoked 9742 * flag since this flag dictates if we 9743 * subtracted from the fs 9744 */ 9745 if (data_list[i]->rec.data.chunk_was_revoked) { 9746 /* Deflate the cwnd */ 9747 data_list[i]->whoTo->cwnd -= data_list[i]->book_size; 9748 data_list[i]->rec.data.chunk_was_revoked = 0; 9749 } 9750 data_list[i]->snd_count++; 9751 sctp_ucount_decr(asoc->sent_queue_retran_cnt); 9752 /* record the time */ 9753 data_list[i]->sent_rcv_time = asoc->time_last_sent; 9754 if (data_list[i]->book_size_scale) { 9755 /* 9756 * need to double the book size on 9757 * this one 9758 */ 9759 data_list[i]->book_size_scale = 0; 9760 /* 9761 * Since we double the booksize, we 9762 * must also double the output queue 9763 * size, since this get shrunk when 9764 * we free by this amount. 9765 */ 9766 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size); 9767 data_list[i]->book_size *= 2; 9768 9769 9770 } else { 9771 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { 9772 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 9773 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); 9774 } 9775 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 9776 (uint32_t) (data_list[i]->send_size + 9777 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); 9778 } 9779 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 9780 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND, 9781 data_list[i]->whoTo->flight_size, 9782 data_list[i]->book_size, 9783 (uintptr_t) data_list[i]->whoTo, 9784 data_list[i]->rec.data.TSN_seq); 9785 } 9786 sctp_flight_size_increase(data_list[i]); 9787 sctp_total_flight_increase(stcb, data_list[i]); 9788 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 9789 /* SWS sender side engages */ 9790 asoc->peers_rwnd = 0; 9791 } 9792 if ((i == 0) && 9793 (data_list[i]->rec.data.doing_fast_retransmit)) { 9794 SCTP_STAT_INCR(sctps_sendfastretrans); 9795 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) && 9796 (tmr_started == 0)) { 9797 /*- 9798 * ok we just fast-retrans'd 9799 * the lowest TSN, i.e the 9800 * first on the list. In 9801 * this case we want to give 9802 * some more time to get a 9803 * SACK back without a 9804 * t3-expiring. 9805 */ 9806 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net, 9807 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4); 9808 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 9809 } 9810 } 9811 } 9812 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 9813 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND); 9814 } 9815#ifdef SCTP_AUDITING_ENABLED 9816 sctp_auditing(21, inp, stcb, NULL); 9817#endif 9818 } else { 9819 /* None will fit */ 9820 return (1); 9821 } 9822 if (asoc->sent_queue_retran_cnt <= 0) { 9823 /* all done we have no more to retran */ 9824 asoc->sent_queue_retran_cnt = 0; 9825 break; 9826 } 9827 if (one_chunk) { 9828 /* No more room in rwnd */ 9829 return (1); 9830 } 9831 /* stop the for loop here. we sent out a packet */ 9832 break; 9833 } 9834 return (0); 9835} 9836 9837static void 9838sctp_timer_validation(struct sctp_inpcb *inp, 9839 struct sctp_tcb *stcb, 9840 struct sctp_association *asoc) 9841{ 9842 struct sctp_nets *net; 9843 9844 /* Validate that a timer is running somewhere */ 9845 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 9846 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 9847 /* Here is a timer */ 9848 return; 9849 } 9850 } 9851 SCTP_TCB_LOCK_ASSERT(stcb); 9852 /* Gak, we did not have a timer somewhere */ 9853 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n"); 9854 if (asoc->alternate) { 9855 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate); 9856 } else { 9857 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination); 9858 } 9859 return; 9860} 9861 9862void 9863sctp_chunk_output(struct sctp_inpcb *inp, 9864 struct sctp_tcb *stcb, 9865 int from_where, 9866 int so_locked 9867#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 9868 SCTP_UNUSED 9869#endif 9870) 9871{ 9872 /*- 9873 * Ok this is the generic chunk service queue. we must do the 9874 * following: 9875 * - See if there are retransmits pending, if so we must 9876 * do these first. 9877 * - Service the stream queue that is next, moving any 9878 * message (note I must get a complete message i.e. 9879 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning 9880 * TSN's 9881 * - Check to see if the cwnd/rwnd allows any output, if so we 9882 * go ahead and fomulate and send the low level chunks. Making sure 9883 * to combine any control in the control chunk queue also. 9884 */ 9885 struct sctp_association *asoc; 9886 struct sctp_nets *net; 9887 int error = 0, num_out, tot_out = 0, ret = 0, reason_code; 9888 unsigned int burst_cnt = 0; 9889 struct timeval now; 9890 int now_filled = 0; 9891 int nagle_on; 9892 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 9893 int un_sent = 0; 9894 int fr_done; 9895 unsigned int tot_frs = 0; 9896 9897 asoc = &stcb->asoc; 9898 /* The Nagle algorithm is only applied when handling a send call. */ 9899 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) { 9900 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) { 9901 nagle_on = 0; 9902 } else { 9903 nagle_on = 1; 9904 } 9905 } else { 9906 nagle_on = 0; 9907 } 9908 SCTP_TCB_LOCK_ASSERT(stcb); 9909 9910 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); 9911 9912 if ((un_sent <= 0) && 9913 (TAILQ_EMPTY(&asoc->control_send_queue)) && 9914 (TAILQ_EMPTY(&asoc->asconf_send_queue)) && 9915 (asoc->sent_queue_retran_cnt == 0)) { 9916 /* Nothing to do unless there is something to be sent left */ 9917 return; 9918 } 9919 /* 9920 * Do we have something to send, data or control AND a sack timer 9921 * running, if so piggy-back the sack. 9922 */ 9923 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 9924 sctp_send_sack(stcb, so_locked); 9925 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 9926 } 9927 while (asoc->sent_queue_retran_cnt) { 9928 /*- 9929 * Ok, it is retransmission time only, we send out only ONE 9930 * packet with a single call off to the retran code. 9931 */ 9932 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) { 9933 /*- 9934 * Special hook for handling cookiess discarded 9935 * by peer that carried data. Send cookie-ack only 9936 * and then the next call with get the retran's. 9937 */ 9938 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 9939 from_where, 9940 &now, &now_filled, frag_point, so_locked); 9941 return; 9942 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) { 9943 /* if its not from a HB then do it */ 9944 fr_done = 0; 9945 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked); 9946 if (fr_done) { 9947 tot_frs++; 9948 } 9949 } else { 9950 /* 9951 * its from any other place, we don't allow retran 9952 * output (only control) 9953 */ 9954 ret = 1; 9955 } 9956 if (ret > 0) { 9957 /* Can't send anymore */ 9958 /*- 9959 * now lets push out control by calling med-level 9960 * output once. this assures that we WILL send HB's 9961 * if queued too. 9962 */ 9963 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 9964 from_where, 9965 &now, &now_filled, frag_point, so_locked); 9966#ifdef SCTP_AUDITING_ENABLED 9967 sctp_auditing(8, inp, stcb, NULL); 9968#endif 9969 sctp_timer_validation(inp, stcb, asoc); 9970 return; 9971 } 9972 if (ret < 0) { 9973 /*- 9974 * The count was off.. retran is not happening so do 9975 * the normal retransmission. 9976 */ 9977#ifdef SCTP_AUDITING_ENABLED 9978 sctp_auditing(9, inp, stcb, NULL); 9979#endif 9980 if (ret == SCTP_RETRAN_EXIT) { 9981 return; 9982 } 9983 break; 9984 } 9985 if (from_where == SCTP_OUTPUT_FROM_T3) { 9986 /* Only one transmission allowed out of a timeout */ 9987#ifdef SCTP_AUDITING_ENABLED 9988 sctp_auditing(10, inp, stcb, NULL); 9989#endif 9990 /* Push out any control */ 9991 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where, 9992 &now, &now_filled, frag_point, so_locked); 9993 return; 9994 } 9995 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) { 9996 /* Hit FR burst limit */ 9997 return; 9998 } 9999 if ((num_out == 0) && (ret == 0)) { 10000 /* No more retrans to send */ 10001 break; 10002 } 10003 } 10004#ifdef SCTP_AUDITING_ENABLED 10005 sctp_auditing(12, inp, stcb, NULL); 10006#endif 10007 /* Check for bad destinations, if they exist move chunks around. */ 10008 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 10009 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 10010 /*- 10011 * if possible move things off of this address we 10012 * still may send below due to the dormant state but 10013 * we try to find an alternate address to send to 10014 * and if we have one we move all queued data on the 10015 * out wheel to this alternate address. 10016 */ 10017 if (net->ref_count > 1) 10018 sctp_move_chunks_from_net(stcb, net); 10019 } else { 10020 /*- 10021 * if ((asoc->sat_network) || (net->addr_is_local)) 10022 * { burst_limit = asoc->max_burst * 10023 * SCTP_SAT_NETWORK_BURST_INCR; } 10024 */ 10025 if (asoc->max_burst > 0) { 10026 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) { 10027 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) { 10028 /* 10029 * JRS - Use the congestion 10030 * control given in the 10031 * congestion control module 10032 */ 10033 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst); 10034 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10035 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED); 10036 } 10037 SCTP_STAT_INCR(sctps_maxburstqueued); 10038 } 10039 net->fast_retran_ip = 0; 10040 } else { 10041 if (net->flight_size == 0) { 10042 /* 10043 * Should be decaying the 10044 * cwnd here 10045 */ 10046 ; 10047 } 10048 } 10049 } 10050 } 10051 10052 } 10053 burst_cnt = 0; 10054 do { 10055 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out, 10056 &reason_code, 0, from_where, 10057 &now, &now_filled, frag_point, so_locked); 10058 if (error) { 10059 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error); 10060 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10061 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP); 10062 } 10063 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10064 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES); 10065 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES); 10066 } 10067 break; 10068 } 10069 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out); 10070 10071 tot_out += num_out; 10072 burst_cnt++; 10073 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10074 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES); 10075 if (num_out == 0) { 10076 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES); 10077 } 10078 } 10079 if (nagle_on) { 10080 /* 10081 * When the Nagle algorithm is used, look at how 10082 * much is unsent, then if its smaller than an MTU 10083 * and we have data in flight we stop, except if we 10084 * are handling a fragmented user message. 10085 */ 10086 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 10087 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 10088 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) && 10089 (stcb->asoc.total_flight > 0) && 10090 ((stcb->asoc.locked_on_sending == NULL) || 10091 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { 10092 break; 10093 } 10094 } 10095 if (TAILQ_EMPTY(&asoc->control_send_queue) && 10096 TAILQ_EMPTY(&asoc->send_queue) && 10097 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { 10098 /* Nothing left to send */ 10099 break; 10100 } 10101 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) { 10102 /* Nothing left to send */ 10103 break; 10104 } 10105 } while (num_out && 10106 ((asoc->max_burst == 0) || 10107 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) || 10108 (burst_cnt < asoc->max_burst))); 10109 10110 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) { 10111 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) { 10112 SCTP_STAT_INCR(sctps_maxburstqueued); 10113 asoc->burst_limit_applied = 1; 10114 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10115 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED); 10116 } 10117 } else { 10118 asoc->burst_limit_applied = 0; 10119 } 10120 } 10121 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10122 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES); 10123 } 10124 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n", 10125 tot_out); 10126 10127 /*- 10128 * Now we need to clean up the control chunk chain if a ECNE is on 10129 * it. It must be marked as UNSENT again so next call will continue 10130 * to send it until such time that we get a CWR, to remove it. 10131 */ 10132 if (stcb->asoc.ecn_echo_cnt_onq) 10133 sctp_fix_ecn_echo(asoc); 10134 return; 10135} 10136 10137 10138int 10139sctp_output( 10140 struct sctp_inpcb *inp, 10141 struct mbuf *m, 10142 struct sockaddr *addr, 10143 struct mbuf *control, 10144 struct thread *p, 10145 int flags) 10146{ 10147 if (inp == NULL) { 10148 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 10149 return (EINVAL); 10150 } 10151 if (inp->sctp_socket == NULL) { 10152 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 10153 return (EINVAL); 10154 } 10155 return (sctp_sosend(inp->sctp_socket, 10156 addr, 10157 (struct uio *)NULL, 10158 m, 10159 control, 10160 flags, p 10161 )); 10162} 10163 10164void 10165send_forward_tsn(struct sctp_tcb *stcb, 10166 struct sctp_association *asoc) 10167{ 10168 struct sctp_tmit_chunk *chk; 10169 struct sctp_forward_tsn_chunk *fwdtsn; 10170 uint32_t advance_peer_ack_point; 10171 10172 SCTP_TCB_LOCK_ASSERT(stcb); 10173 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 10174 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 10175 /* mark it to unsent */ 10176 chk->sent = SCTP_DATAGRAM_UNSENT; 10177 chk->snd_count = 0; 10178 /* Do we correct its output location? */ 10179 if (chk->whoTo) { 10180 sctp_free_remote_addr(chk->whoTo); 10181 chk->whoTo = NULL; 10182 } 10183 goto sctp_fill_in_rest; 10184 } 10185 } 10186 /* Ok if we reach here we must build one */ 10187 sctp_alloc_a_chunk(stcb, chk); 10188 if (chk == NULL) { 10189 return; 10190 } 10191 asoc->fwd_tsn_cnt++; 10192 chk->copy_by_ref = 0; 10193 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN; 10194 chk->rec.chunk_id.can_take_data = 0; 10195 chk->flags = 0; 10196 chk->asoc = asoc; 10197 chk->whoTo = NULL; 10198 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 10199 if (chk->data == NULL) { 10200 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 10201 return; 10202 } 10203 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 10204 chk->sent = SCTP_DATAGRAM_UNSENT; 10205 chk->snd_count = 0; 10206 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next); 10207 asoc->ctrl_queue_cnt++; 10208sctp_fill_in_rest: 10209 /*- 10210 * Here we go through and fill out the part that deals with 10211 * stream/seq of the ones we skip. 10212 */ 10213 SCTP_BUF_LEN(chk->data) = 0; 10214 { 10215 struct sctp_tmit_chunk *at, *tp1, *last; 10216 struct sctp_strseq *strseq; 10217 unsigned int cnt_of_space, i, ovh; 10218 unsigned int space_needed; 10219 unsigned int cnt_of_skipped = 0; 10220 10221 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) { 10222 if ((at->sent != SCTP_FORWARD_TSN_SKIP) && 10223 (at->sent != SCTP_DATAGRAM_NR_ACKED)) { 10224 /* no more to look at */ 10225 break; 10226 } 10227 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 10228 /* We don't report these */ 10229 continue; 10230 } 10231 cnt_of_skipped++; 10232 } 10233 space_needed = (sizeof(struct sctp_forward_tsn_chunk) + 10234 (cnt_of_skipped * sizeof(struct sctp_strseq))); 10235 10236 cnt_of_space = M_TRAILINGSPACE(chk->data); 10237 10238 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 10239 ovh = SCTP_MIN_OVERHEAD; 10240 } else { 10241 ovh = SCTP_MIN_V4_OVERHEAD; 10242 } 10243 if (cnt_of_space > (asoc->smallest_mtu - ovh)) { 10244 /* trim to a mtu size */ 10245 cnt_of_space = asoc->smallest_mtu - ovh; 10246 } 10247 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10248 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10249 0xff, 0, cnt_of_skipped, 10250 asoc->advanced_peer_ack_point); 10251 10252 } 10253 advance_peer_ack_point = asoc->advanced_peer_ack_point; 10254 if (cnt_of_space < space_needed) { 10255 /*- 10256 * ok we must trim down the chunk by lowering the 10257 * advance peer ack point. 10258 */ 10259 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10260 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10261 0xff, 0xff, cnt_of_space, 10262 space_needed); 10263 } 10264 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk); 10265 cnt_of_skipped /= sizeof(struct sctp_strseq); 10266 /*- 10267 * Go through and find the TSN that will be the one 10268 * we report. 10269 */ 10270 at = TAILQ_FIRST(&asoc->sent_queue); 10271 if (at != NULL) { 10272 for (i = 0; i < cnt_of_skipped; i++) { 10273 tp1 = TAILQ_NEXT(at, sctp_next); 10274 if (tp1 == NULL) { 10275 break; 10276 } 10277 at = tp1; 10278 } 10279 } 10280 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10281 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10282 0xff, cnt_of_skipped, at->rec.data.TSN_seq, 10283 asoc->advanced_peer_ack_point); 10284 } 10285 last = at; 10286 /*- 10287 * last now points to last one I can report, update 10288 * peer ack point 10289 */ 10290 if (last) 10291 advance_peer_ack_point = last->rec.data.TSN_seq; 10292 space_needed = sizeof(struct sctp_forward_tsn_chunk) + 10293 cnt_of_skipped * sizeof(struct sctp_strseq); 10294 } 10295 chk->send_size = space_needed; 10296 /* Setup the chunk */ 10297 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *); 10298 fwdtsn->ch.chunk_length = htons(chk->send_size); 10299 fwdtsn->ch.chunk_flags = 0; 10300 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN; 10301 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point); 10302 SCTP_BUF_LEN(chk->data) = chk->send_size; 10303 fwdtsn++; 10304 /*- 10305 * Move pointer to after the fwdtsn and transfer to the 10306 * strseq pointer. 10307 */ 10308 strseq = (struct sctp_strseq *)fwdtsn; 10309 /*- 10310 * Now populate the strseq list. This is done blindly 10311 * without pulling out duplicate stream info. This is 10312 * inefficent but won't harm the process since the peer will 10313 * look at these in sequence and will thus release anything. 10314 * It could mean we exceed the PMTU and chop off some that 10315 * we could have included.. but this is unlikely (aka 1432/4 10316 * would mean 300+ stream seq's would have to be reported in 10317 * one FWD-TSN. With a bit of work we can later FIX this to 10318 * optimize and pull out duplcates.. but it does add more 10319 * overhead. So for now... not! 10320 */ 10321 at = TAILQ_FIRST(&asoc->sent_queue); 10322 for (i = 0; i < cnt_of_skipped; i++) { 10323 tp1 = TAILQ_NEXT(at, sctp_next); 10324 if (tp1 == NULL) 10325 break; 10326 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 10327 /* We don't report these */ 10328 i--; 10329 at = tp1; 10330 continue; 10331 } 10332 if (at->rec.data.TSN_seq == advance_peer_ack_point) { 10333 at->rec.data.fwd_tsn_cnt = 0; 10334 } 10335 strseq->stream = ntohs(at->rec.data.stream_number); 10336 strseq->sequence = ntohs(at->rec.data.stream_seq); 10337 strseq++; 10338 at = tp1; 10339 } 10340 } 10341 return; 10342} 10343 10344void 10345sctp_send_sack(struct sctp_tcb *stcb, int so_locked 10346#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 10347 SCTP_UNUSED 10348#endif 10349) 10350{ 10351 /*- 10352 * Queue up a SACK or NR-SACK in the control queue. 10353 * We must first check to see if a SACK or NR-SACK is 10354 * somehow on the control queue. 10355 * If so, we will take and and remove the old one. 10356 */ 10357 struct sctp_association *asoc; 10358 struct sctp_tmit_chunk *chk, *a_chk; 10359 struct sctp_sack_chunk *sack; 10360 struct sctp_nr_sack_chunk *nr_sack; 10361 struct sctp_gap_ack_block *gap_descriptor; 10362 struct sack_track *selector; 10363 int mergeable = 0; 10364 int offset; 10365 caddr_t limit; 10366 uint32_t *dup; 10367 int limit_reached = 0; 10368 unsigned int i, siz, j; 10369 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space; 10370 int num_dups = 0; 10371 int space_req; 10372 uint32_t highest_tsn; 10373 uint8_t flags; 10374 uint8_t type; 10375 uint8_t tsn_map; 10376 10377 if (stcb->asoc.nrsack_supported == 1) { 10378 type = SCTP_NR_SELECTIVE_ACK; 10379 } else { 10380 type = SCTP_SELECTIVE_ACK; 10381 } 10382 a_chk = NULL; 10383 asoc = &stcb->asoc; 10384 SCTP_TCB_LOCK_ASSERT(stcb); 10385 if (asoc->last_data_chunk_from == NULL) { 10386 /* Hmm we never received anything */ 10387 return; 10388 } 10389 sctp_slide_mapping_arrays(stcb); 10390 sctp_set_rwnd(stcb, asoc); 10391 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 10392 if (chk->rec.chunk_id.id == type) { 10393 /* Hmm, found a sack already on queue, remove it */ 10394 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 10395 asoc->ctrl_queue_cnt--; 10396 a_chk = chk; 10397 if (a_chk->data) { 10398 sctp_m_freem(a_chk->data); 10399 a_chk->data = NULL; 10400 } 10401 if (a_chk->whoTo) { 10402 sctp_free_remote_addr(a_chk->whoTo); 10403 a_chk->whoTo = NULL; 10404 } 10405 break; 10406 } 10407 } 10408 if (a_chk == NULL) { 10409 sctp_alloc_a_chunk(stcb, a_chk); 10410 if (a_chk == NULL) { 10411 /* No memory so we drop the idea, and set a timer */ 10412 if (stcb->asoc.delayed_ack) { 10413 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 10414 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5); 10415 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 10416 stcb->sctp_ep, stcb, NULL); 10417 } else { 10418 stcb->asoc.send_sack = 1; 10419 } 10420 return; 10421 } 10422 a_chk->copy_by_ref = 0; 10423 a_chk->rec.chunk_id.id = type; 10424 a_chk->rec.chunk_id.can_take_data = 1; 10425 } 10426 /* Clear our pkt counts */ 10427 asoc->data_pkts_seen = 0; 10428 10429 a_chk->flags = 0; 10430 a_chk->asoc = asoc; 10431 a_chk->snd_count = 0; 10432 a_chk->send_size = 0; /* fill in later */ 10433 a_chk->sent = SCTP_DATAGRAM_UNSENT; 10434 a_chk->whoTo = NULL; 10435 10436 if ((asoc->numduptsns) || 10437 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) { 10438 /*- 10439 * Ok, we have some duplicates or the destination for the 10440 * sack is unreachable, lets see if we can select an 10441 * alternate than asoc->last_data_chunk_from 10442 */ 10443 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) && 10444 (asoc->used_alt_onsack > asoc->numnets)) { 10445 /* We used an alt last time, don't this time */ 10446 a_chk->whoTo = NULL; 10447 } else { 10448 asoc->used_alt_onsack++; 10449 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0); 10450 } 10451 if (a_chk->whoTo == NULL) { 10452 /* Nope, no alternate */ 10453 a_chk->whoTo = asoc->last_data_chunk_from; 10454 asoc->used_alt_onsack = 0; 10455 } 10456 } else { 10457 /* 10458 * No duplicates so we use the last place we received data 10459 * from. 10460 */ 10461 asoc->used_alt_onsack = 0; 10462 a_chk->whoTo = asoc->last_data_chunk_from; 10463 } 10464 if (a_chk->whoTo) { 10465 atomic_add_int(&a_chk->whoTo->ref_count, 1); 10466 } 10467 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) { 10468 highest_tsn = asoc->highest_tsn_inside_map; 10469 } else { 10470 highest_tsn = asoc->highest_tsn_inside_nr_map; 10471 } 10472 if (highest_tsn == asoc->cumulative_tsn) { 10473 /* no gaps */ 10474 if (type == SCTP_SELECTIVE_ACK) { 10475 space_req = sizeof(struct sctp_sack_chunk); 10476 } else { 10477 space_req = sizeof(struct sctp_nr_sack_chunk); 10478 } 10479 } else { 10480 /* gaps get a cluster */ 10481 space_req = MCLBYTES; 10482 } 10483 /* Ok now lets formulate a MBUF with our sack */ 10484 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA); 10485 if ((a_chk->data == NULL) || 10486 (a_chk->whoTo == NULL)) { 10487 /* rats, no mbuf memory */ 10488 if (a_chk->data) { 10489 /* was a problem with the destination */ 10490 sctp_m_freem(a_chk->data); 10491 a_chk->data = NULL; 10492 } 10493 sctp_free_a_chunk(stcb, a_chk, so_locked); 10494 /* sa_ignore NO_NULL_CHK */ 10495 if (stcb->asoc.delayed_ack) { 10496 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 10497 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6); 10498 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 10499 stcb->sctp_ep, stcb, NULL); 10500 } else { 10501 stcb->asoc.send_sack = 1; 10502 } 10503 return; 10504 } 10505 /* ok, lets go through and fill it in */ 10506 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD); 10507 space = M_TRAILINGSPACE(a_chk->data); 10508 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) { 10509 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD); 10510 } 10511 limit = mtod(a_chk->data, caddr_t); 10512 limit += space; 10513 10514 flags = 0; 10515 10516 if ((asoc->sctp_cmt_on_off > 0) && 10517 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) { 10518 /*- 10519 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been 10520 * received, then set high bit to 1, else 0. Reset 10521 * pkts_rcvd. 10522 */ 10523 flags |= (asoc->cmt_dac_pkts_rcvd << 6); 10524 asoc->cmt_dac_pkts_rcvd = 0; 10525 } 10526#ifdef SCTP_ASOCLOG_OF_TSNS 10527 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn; 10528 stcb->asoc.cumack_log_atsnt++; 10529 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) { 10530 stcb->asoc.cumack_log_atsnt = 0; 10531 } 10532#endif 10533 /* reset the readers interpretation */ 10534 stcb->freed_by_sorcv_sincelast = 0; 10535 10536 if (type == SCTP_SELECTIVE_ACK) { 10537 sack = mtod(a_chk->data, struct sctp_sack_chunk *); 10538 nr_sack = NULL; 10539 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk)); 10540 if (highest_tsn > asoc->mapping_array_base_tsn) { 10541 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10542 } else { 10543 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8; 10544 } 10545 } else { 10546 sack = NULL; 10547 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *); 10548 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk)); 10549 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) { 10550 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10551 } else { 10552 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8; 10553 } 10554 } 10555 10556 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { 10557 offset = 1; 10558 } else { 10559 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; 10560 } 10561 if (((type == SCTP_SELECTIVE_ACK) && 10562 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) || 10563 ((type == SCTP_NR_SELECTIVE_ACK) && 10564 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) { 10565 /* we have a gap .. maybe */ 10566 for (i = 0; i < siz; i++) { 10567 tsn_map = asoc->mapping_array[i]; 10568 if (type == SCTP_SELECTIVE_ACK) { 10569 tsn_map |= asoc->nr_mapping_array[i]; 10570 } 10571 if (i == 0) { 10572 /* 10573 * Clear all bits corresponding to TSNs 10574 * smaller or equal to the cumulative TSN. 10575 */ 10576 tsn_map &= (~0 << (1 - offset)); 10577 } 10578 selector = &sack_array[tsn_map]; 10579 if (mergeable && selector->right_edge) { 10580 /* 10581 * Backup, left and right edges were ok to 10582 * merge. 10583 */ 10584 num_gap_blocks--; 10585 gap_descriptor--; 10586 } 10587 if (selector->num_entries == 0) 10588 mergeable = 0; 10589 else { 10590 for (j = 0; j < selector->num_entries; j++) { 10591 if (mergeable && selector->right_edge) { 10592 /* 10593 * do a merge by NOT setting 10594 * the left side 10595 */ 10596 mergeable = 0; 10597 } else { 10598 /* 10599 * no merge, set the left 10600 * side 10601 */ 10602 mergeable = 0; 10603 gap_descriptor->start = htons((selector->gaps[j].start + offset)); 10604 } 10605 gap_descriptor->end = htons((selector->gaps[j].end + offset)); 10606 num_gap_blocks++; 10607 gap_descriptor++; 10608 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { 10609 /* no more room */ 10610 limit_reached = 1; 10611 break; 10612 } 10613 } 10614 if (selector->left_edge) { 10615 mergeable = 1; 10616 } 10617 } 10618 if (limit_reached) { 10619 /* Reached the limit stop */ 10620 break; 10621 } 10622 offset += 8; 10623 } 10624 } 10625 if ((type == SCTP_NR_SELECTIVE_ACK) && 10626 (limit_reached == 0)) { 10627 10628 mergeable = 0; 10629 10630 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) { 10631 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10632 } else { 10633 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8; 10634 } 10635 10636 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { 10637 offset = 1; 10638 } else { 10639 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; 10640 } 10641 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) { 10642 /* we have a gap .. maybe */ 10643 for (i = 0; i < siz; i++) { 10644 tsn_map = asoc->nr_mapping_array[i]; 10645 if (i == 0) { 10646 /* 10647 * Clear all bits corresponding to 10648 * TSNs smaller or equal to the 10649 * cumulative TSN. 10650 */ 10651 tsn_map &= (~0 << (1 - offset)); 10652 } 10653 selector = &sack_array[tsn_map]; 10654 if (mergeable && selector->right_edge) { 10655 /* 10656 * Backup, left and right edges were 10657 * ok to merge. 10658 */ 10659 num_nr_gap_blocks--; 10660 gap_descriptor--; 10661 } 10662 if (selector->num_entries == 0) 10663 mergeable = 0; 10664 else { 10665 for (j = 0; j < selector->num_entries; j++) { 10666 if (mergeable && selector->right_edge) { 10667 /* 10668 * do a merge by NOT 10669 * setting the left 10670 * side 10671 */ 10672 mergeable = 0; 10673 } else { 10674 /* 10675 * no merge, set the 10676 * left side 10677 */ 10678 mergeable = 0; 10679 gap_descriptor->start = htons((selector->gaps[j].start + offset)); 10680 } 10681 gap_descriptor->end = htons((selector->gaps[j].end + offset)); 10682 num_nr_gap_blocks++; 10683 gap_descriptor++; 10684 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { 10685 /* no more room */ 10686 limit_reached = 1; 10687 break; 10688 } 10689 } 10690 if (selector->left_edge) { 10691 mergeable = 1; 10692 } 10693 } 10694 if (limit_reached) { 10695 /* Reached the limit stop */ 10696 break; 10697 } 10698 offset += 8; 10699 } 10700 } 10701 } 10702 /* now we must add any dups we are going to report. */ 10703 if ((limit_reached == 0) && (asoc->numduptsns)) { 10704 dup = (uint32_t *) gap_descriptor; 10705 for (i = 0; i < asoc->numduptsns; i++) { 10706 *dup = htonl(asoc->dup_tsns[i]); 10707 dup++; 10708 num_dups++; 10709 if (((caddr_t)dup + sizeof(uint32_t)) > limit) { 10710 /* no more room */ 10711 break; 10712 } 10713 } 10714 asoc->numduptsns = 0; 10715 } 10716 /* 10717 * now that the chunk is prepared queue it to the control chunk 10718 * queue. 10719 */ 10720 if (type == SCTP_SELECTIVE_ACK) { 10721 a_chk->send_size = sizeof(struct sctp_sack_chunk) + 10722 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + 10723 num_dups * sizeof(int32_t); 10724 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; 10725 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); 10726 sack->sack.a_rwnd = htonl(asoc->my_rwnd); 10727 sack->sack.num_gap_ack_blks = htons(num_gap_blocks); 10728 sack->sack.num_dup_tsns = htons(num_dups); 10729 sack->ch.chunk_type = type; 10730 sack->ch.chunk_flags = flags; 10731 sack->ch.chunk_length = htons(a_chk->send_size); 10732 } else { 10733 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) + 10734 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + 10735 num_dups * sizeof(int32_t); 10736 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; 10737 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); 10738 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd); 10739 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks); 10740 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks); 10741 nr_sack->nr_sack.num_dup_tsns = htons(num_dups); 10742 nr_sack->nr_sack.reserved = 0; 10743 nr_sack->ch.chunk_type = type; 10744 nr_sack->ch.chunk_flags = flags; 10745 nr_sack->ch.chunk_length = htons(a_chk->send_size); 10746 } 10747 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next); 10748 asoc->my_last_reported_rwnd = asoc->my_rwnd; 10749 asoc->ctrl_queue_cnt++; 10750 asoc->send_sack = 0; 10751 SCTP_STAT_INCR(sctps_sendsacks); 10752 return; 10753} 10754 10755void 10756sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked 10757#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 10758 SCTP_UNUSED 10759#endif 10760) 10761{ 10762 struct mbuf *m_abort, *m, *m_last; 10763 struct mbuf *m_out, *m_end = NULL; 10764 struct sctp_abort_chunk *abort; 10765 struct sctp_auth_chunk *auth = NULL; 10766 struct sctp_nets *net; 10767 uint32_t vtag; 10768 uint32_t auth_offset = 0; 10769 uint16_t cause_len, chunk_len, padding_len; 10770 10771 SCTP_TCB_LOCK_ASSERT(stcb); 10772 /*- 10773 * Add an AUTH chunk, if chunk requires it and save the offset into 10774 * the chain for AUTH 10775 */ 10776 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION, 10777 stcb->asoc.peer_auth_chunks)) { 10778 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset, 10779 stcb, SCTP_ABORT_ASSOCIATION); 10780 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10781 } else { 10782 m_out = NULL; 10783 } 10784 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER); 10785 if (m_abort == NULL) { 10786 if (m_out) { 10787 sctp_m_freem(m_out); 10788 } 10789 if (operr) { 10790 sctp_m_freem(operr); 10791 } 10792 return; 10793 } 10794 /* link in any error */ 10795 SCTP_BUF_NEXT(m_abort) = operr; 10796 cause_len = 0; 10797 m_last = NULL; 10798 for (m = operr; m; m = SCTP_BUF_NEXT(m)) { 10799 cause_len += (uint16_t) SCTP_BUF_LEN(m); 10800 if (SCTP_BUF_NEXT(m) == NULL) { 10801 m_last = m; 10802 } 10803 } 10804 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk); 10805 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len; 10806 padding_len = SCTP_SIZE32(chunk_len) - chunk_len; 10807 if (m_out == NULL) { 10808 /* NO Auth chunk prepended, so reserve space in front */ 10809 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD); 10810 m_out = m_abort; 10811 } else { 10812 /* Put AUTH chunk at the front of the chain */ 10813 SCTP_BUF_NEXT(m_end) = m_abort; 10814 } 10815 if (stcb->asoc.alternate) { 10816 net = stcb->asoc.alternate; 10817 } else { 10818 net = stcb->asoc.primary_destination; 10819 } 10820 /* Fill in the ABORT chunk header. */ 10821 abort = mtod(m_abort, struct sctp_abort_chunk *); 10822 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION; 10823 if (stcb->asoc.peer_vtag == 0) { 10824 /* This happens iff the assoc is in COOKIE-WAIT state. */ 10825 vtag = stcb->asoc.my_vtag; 10826 abort->ch.chunk_flags = SCTP_HAD_NO_TCB; 10827 } else { 10828 vtag = stcb->asoc.peer_vtag; 10829 abort->ch.chunk_flags = 0; 10830 } 10831 abort->ch.chunk_length = htons(chunk_len); 10832 /* Add padding, if necessary. */ 10833 if (padding_len > 0) { 10834 if ((m_last == NULL) || 10835 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) { 10836 sctp_m_freem(m_out); 10837 return; 10838 } 10839 } 10840 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, 10841 (struct sockaddr *)&net->ro._l_addr, 10842 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0, 10843 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag), 10844 stcb->asoc.primary_destination->port, NULL, 10845 0, 0, 10846 so_locked); 10847 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10848} 10849 10850void 10851sctp_send_shutdown_complete(struct sctp_tcb *stcb, 10852 struct sctp_nets *net, 10853 int reflect_vtag) 10854{ 10855 /* formulate and SEND a SHUTDOWN-COMPLETE */ 10856 struct mbuf *m_shutdown_comp; 10857 struct sctp_shutdown_complete_chunk *shutdown_complete; 10858 uint32_t vtag; 10859 uint8_t flags; 10860 10861 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER); 10862 if (m_shutdown_comp == NULL) { 10863 /* no mbuf's */ 10864 return; 10865 } 10866 if (reflect_vtag) { 10867 flags = SCTP_HAD_NO_TCB; 10868 vtag = stcb->asoc.my_vtag; 10869 } else { 10870 flags = 0; 10871 vtag = stcb->asoc.peer_vtag; 10872 } 10873 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *); 10874 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE; 10875 shutdown_complete->ch.chunk_flags = flags; 10876 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk)); 10877 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk); 10878 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, 10879 (struct sockaddr *)&net->ro._l_addr, 10880 m_shutdown_comp, 0, NULL, 0, 1, 0, 0, 10881 stcb->sctp_ep->sctp_lport, stcb->rport, 10882 htonl(vtag), 10883 net->port, NULL, 10884 0, 0, 10885 SCTP_SO_NOT_LOCKED); 10886 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10887 return; 10888} 10889 10890static void 10891sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst, 10892 struct sctphdr *sh, uint32_t vtag, 10893 uint8_t type, struct mbuf *cause, 10894 uint8_t mflowtype, uint32_t mflowid, 10895 uint32_t vrf_id, uint16_t port) 10896{ 10897 struct mbuf *o_pak; 10898 struct mbuf *mout; 10899 struct sctphdr *shout; 10900 struct sctp_chunkhdr *ch; 10901 10902#if defined(INET) || defined(INET6) 10903 struct udphdr *udp; 10904 int ret; 10905 10906#endif 10907 int len, cause_len, padding_len; 10908 10909#ifdef INET 10910 struct sockaddr_in *src_sin, *dst_sin; 10911 struct ip *ip; 10912 10913#endif 10914#ifdef INET6 10915 struct sockaddr_in6 *src_sin6, *dst_sin6; 10916 struct ip6_hdr *ip6; 10917 10918#endif 10919 10920 /* Compute the length of the cause and add final padding. */ 10921 cause_len = 0; 10922 if (cause != NULL) { 10923 struct mbuf *m_at, *m_last = NULL; 10924 10925 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 10926 if (SCTP_BUF_NEXT(m_at) == NULL) 10927 m_last = m_at; 10928 cause_len += SCTP_BUF_LEN(m_at); 10929 } 10930 padding_len = cause_len % 4; 10931 if (padding_len != 0) { 10932 padding_len = 4 - padding_len; 10933 } 10934 if (padding_len != 0) { 10935 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 10936 sctp_m_freem(cause); 10937 return; 10938 } 10939 } 10940 } else { 10941 padding_len = 0; 10942 } 10943 /* Get an mbuf for the header. */ 10944 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 10945 switch (dst->sa_family) { 10946#ifdef INET 10947 case AF_INET: 10948 len += sizeof(struct ip); 10949 break; 10950#endif 10951#ifdef INET6 10952 case AF_INET6: 10953 len += sizeof(struct ip6_hdr); 10954 break; 10955#endif 10956 default: 10957 break; 10958 } 10959#if defined(INET) || defined(INET6) 10960 if (port) { 10961 len += sizeof(struct udphdr); 10962 } 10963#endif 10964 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA); 10965 if (mout == NULL) { 10966 if (cause) { 10967 sctp_m_freem(cause); 10968 } 10969 return; 10970 } 10971 SCTP_BUF_RESV_UF(mout, max_linkhdr); 10972 SCTP_BUF_LEN(mout) = len; 10973 SCTP_BUF_NEXT(mout) = cause; 10974 mout->m_pkthdr.flowid = mflowid; 10975 M_HASHTYPE_SET(mout, mflowtype); 10976#ifdef INET 10977 ip = NULL; 10978#endif 10979#ifdef INET6 10980 ip6 = NULL; 10981#endif 10982 switch (dst->sa_family) { 10983#ifdef INET 10984 case AF_INET: 10985 src_sin = (struct sockaddr_in *)src; 10986 dst_sin = (struct sockaddr_in *)dst; 10987 ip = mtod(mout, struct ip *); 10988 ip->ip_v = IPVERSION; 10989 ip->ip_hl = (sizeof(struct ip) >> 2); 10990 ip->ip_tos = 0; 10991 ip->ip_id = ip_newid(); 10992 ip->ip_off = 0; 10993 ip->ip_ttl = MODULE_GLOBAL(ip_defttl); 10994 if (port) { 10995 ip->ip_p = IPPROTO_UDP; 10996 } else { 10997 ip->ip_p = IPPROTO_SCTP; 10998 } 10999 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr; 11000 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr; 11001 ip->ip_sum = 0; 11002 len = sizeof(struct ip); 11003 shout = (struct sctphdr *)((caddr_t)ip + len); 11004 break; 11005#endif 11006#ifdef INET6 11007 case AF_INET6: 11008 src_sin6 = (struct sockaddr_in6 *)src; 11009 dst_sin6 = (struct sockaddr_in6 *)dst; 11010 ip6 = mtod(mout, struct ip6_hdr *); 11011 ip6->ip6_flow = htonl(0x60000000); 11012 if (V_ip6_auto_flowlabel) { 11013 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 11014 } 11015 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim); 11016 if (port) { 11017 ip6->ip6_nxt = IPPROTO_UDP; 11018 } else { 11019 ip6->ip6_nxt = IPPROTO_SCTP; 11020 } 11021 ip6->ip6_src = dst_sin6->sin6_addr; 11022 ip6->ip6_dst = src_sin6->sin6_addr; 11023 len = sizeof(struct ip6_hdr); 11024 shout = (struct sctphdr *)((caddr_t)ip6 + len); 11025 break; 11026#endif 11027 default: 11028 len = 0; 11029 shout = mtod(mout, struct sctphdr *); 11030 break; 11031 } 11032#if defined(INET) || defined(INET6) 11033 if (port) { 11034 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 11035 sctp_m_freem(mout); 11036 return; 11037 } 11038 udp = (struct udphdr *)shout; 11039 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 11040 udp->uh_dport = port; 11041 udp->uh_sum = 0; 11042 udp->uh_ulen = htons(sizeof(struct udphdr) + 11043 sizeof(struct sctphdr) + 11044 sizeof(struct sctp_chunkhdr) + 11045 cause_len + padding_len); 11046 len += sizeof(struct udphdr); 11047 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr)); 11048 } else { 11049 udp = NULL; 11050 } 11051#endif 11052 shout->src_port = sh->dest_port; 11053 shout->dest_port = sh->src_port; 11054 shout->checksum = 0; 11055 if (vtag) { 11056 shout->v_tag = htonl(vtag); 11057 } else { 11058 shout->v_tag = sh->v_tag; 11059 } 11060 len += sizeof(struct sctphdr); 11061 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr)); 11062 ch->chunk_type = type; 11063 if (vtag) { 11064 ch->chunk_flags = 0; 11065 } else { 11066 ch->chunk_flags = SCTP_HAD_NO_TCB; 11067 } 11068 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len); 11069 len += sizeof(struct sctp_chunkhdr); 11070 len += cause_len + padding_len; 11071 11072 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 11073 sctp_m_freem(mout); 11074 return; 11075 } 11076 SCTP_ATTACH_CHAIN(o_pak, mout, len); 11077 switch (dst->sa_family) { 11078#ifdef INET 11079 case AF_INET: 11080 if (port) { 11081 if (V_udp_cksum) { 11082 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 11083 } else { 11084 udp->uh_sum = 0; 11085 } 11086 } 11087 ip->ip_len = htons(len); 11088 if (port) { 11089#if defined(SCTP_WITH_NO_CSUM) 11090 SCTP_STAT_INCR(sctps_sendnocrc); 11091#else 11092 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr)); 11093 SCTP_STAT_INCR(sctps_sendswcrc); 11094#endif 11095 if (V_udp_cksum) { 11096 SCTP_ENABLE_UDP_CSUM(o_pak); 11097 } 11098 } else { 11099#if defined(SCTP_WITH_NO_CSUM) 11100 SCTP_STAT_INCR(sctps_sendnocrc); 11101#else 11102 mout->m_pkthdr.csum_flags = CSUM_SCTP; 11103 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 11104 SCTP_STAT_INCR(sctps_sendhwcrc); 11105#endif 11106 } 11107#ifdef SCTP_PACKET_LOGGING 11108 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 11109 sctp_packet_log(o_pak); 11110 } 11111#endif 11112 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id); 11113 break; 11114#endif 11115#ifdef INET6 11116 case AF_INET6: 11117 ip6->ip6_plen = len - sizeof(struct ip6_hdr); 11118 if (port) { 11119#if defined(SCTP_WITH_NO_CSUM) 11120 SCTP_STAT_INCR(sctps_sendnocrc); 11121#else 11122 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 11123 SCTP_STAT_INCR(sctps_sendswcrc); 11124#endif 11125 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) { 11126 udp->uh_sum = 0xffff; 11127 } 11128 } else { 11129#if defined(SCTP_WITH_NO_CSUM) 11130 SCTP_STAT_INCR(sctps_sendnocrc); 11131#else 11132 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6; 11133 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 11134 SCTP_STAT_INCR(sctps_sendhwcrc); 11135#endif 11136 } 11137#ifdef SCTP_PACKET_LOGGING 11138 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 11139 sctp_packet_log(o_pak); 11140 } 11141#endif 11142 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id); 11143 break; 11144#endif 11145 default: 11146 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n", 11147 dst->sa_family); 11148 sctp_m_freem(mout); 11149 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); 11150 return; 11151 } 11152 SCTP_STAT_INCR(sctps_sendpackets); 11153 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 11154 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 11155 return; 11156} 11157 11158void 11159sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst, 11160 struct sctphdr *sh, 11161 uint8_t mflowtype, uint32_t mflowid, 11162 uint32_t vrf_id, uint16_t port) 11163{ 11164 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL, 11165 mflowtype, mflowid, 11166 vrf_id, port); 11167} 11168 11169void 11170sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked 11171#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 11172 SCTP_UNUSED 11173#endif 11174) 11175{ 11176 struct sctp_tmit_chunk *chk; 11177 struct sctp_heartbeat_chunk *hb; 11178 struct timeval now; 11179 11180 SCTP_TCB_LOCK_ASSERT(stcb); 11181 if (net == NULL) { 11182 return; 11183 } 11184 (void)SCTP_GETTIME_TIMEVAL(&now); 11185 switch (net->ro._l_addr.sa.sa_family) { 11186#ifdef INET 11187 case AF_INET: 11188 break; 11189#endif 11190#ifdef INET6 11191 case AF_INET6: 11192 break; 11193#endif 11194 default: 11195 return; 11196 } 11197 sctp_alloc_a_chunk(stcb, chk); 11198 if (chk == NULL) { 11199 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n"); 11200 return; 11201 } 11202 chk->copy_by_ref = 0; 11203 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST; 11204 chk->rec.chunk_id.can_take_data = 1; 11205 chk->flags = 0; 11206 chk->asoc = &stcb->asoc; 11207 chk->send_size = sizeof(struct sctp_heartbeat_chunk); 11208 11209 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11210 if (chk->data == NULL) { 11211 sctp_free_a_chunk(stcb, chk, so_locked); 11212 return; 11213 } 11214 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11215 SCTP_BUF_LEN(chk->data) = chk->send_size; 11216 chk->sent = SCTP_DATAGRAM_UNSENT; 11217 chk->snd_count = 0; 11218 chk->whoTo = net; 11219 atomic_add_int(&chk->whoTo->ref_count, 1); 11220 /* Now we have a mbuf that we can fill in with the details */ 11221 hb = mtod(chk->data, struct sctp_heartbeat_chunk *); 11222 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk)); 11223 /* fill out chunk header */ 11224 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST; 11225 hb->ch.chunk_flags = 0; 11226 hb->ch.chunk_length = htons(chk->send_size); 11227 /* Fill out hb parameter */ 11228 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO); 11229 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param)); 11230 hb->heartbeat.hb_info.time_value_1 = now.tv_sec; 11231 hb->heartbeat.hb_info.time_value_2 = now.tv_usec; 11232 /* Did our user request this one, put it in */ 11233 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family; 11234 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len; 11235 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 11236 /* 11237 * we only take from the entropy pool if the address is not 11238 * confirmed. 11239 */ 11240 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 11241 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 11242 } else { 11243 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0; 11244 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0; 11245 } 11246 switch (net->ro._l_addr.sa.sa_family) { 11247#ifdef INET 11248 case AF_INET: 11249 memcpy(hb->heartbeat.hb_info.address, 11250 &net->ro._l_addr.sin.sin_addr, 11251 sizeof(net->ro._l_addr.sin.sin_addr)); 11252 break; 11253#endif 11254#ifdef INET6 11255 case AF_INET6: 11256 memcpy(hb->heartbeat.hb_info.address, 11257 &net->ro._l_addr.sin6.sin6_addr, 11258 sizeof(net->ro._l_addr.sin6.sin6_addr)); 11259 break; 11260#endif 11261 default: 11262 return; 11263 break; 11264 } 11265 net->hb_responded = 0; 11266 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11267 stcb->asoc.ctrl_queue_cnt++; 11268 SCTP_STAT_INCR(sctps_sendheartbeat); 11269 return; 11270} 11271 11272void 11273sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net, 11274 uint32_t high_tsn) 11275{ 11276 struct sctp_association *asoc; 11277 struct sctp_ecne_chunk *ecne; 11278 struct sctp_tmit_chunk *chk; 11279 11280 if (net == NULL) { 11281 return; 11282 } 11283 asoc = &stcb->asoc; 11284 SCTP_TCB_LOCK_ASSERT(stcb); 11285 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 11286 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) { 11287 /* found a previous ECN_ECHO update it if needed */ 11288 uint32_t cnt, ctsn; 11289 11290 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 11291 ctsn = ntohl(ecne->tsn); 11292 if (SCTP_TSN_GT(high_tsn, ctsn)) { 11293 ecne->tsn = htonl(high_tsn); 11294 SCTP_STAT_INCR(sctps_queue_upd_ecne); 11295 } 11296 cnt = ntohl(ecne->num_pkts_since_cwr); 11297 cnt++; 11298 ecne->num_pkts_since_cwr = htonl(cnt); 11299 return; 11300 } 11301 } 11302 /* nope could not find one to update so we must build one */ 11303 sctp_alloc_a_chunk(stcb, chk); 11304 if (chk == NULL) { 11305 return; 11306 } 11307 SCTP_STAT_INCR(sctps_queue_upd_ecne); 11308 chk->copy_by_ref = 0; 11309 chk->rec.chunk_id.id = SCTP_ECN_ECHO; 11310 chk->rec.chunk_id.can_take_data = 0; 11311 chk->flags = 0; 11312 chk->asoc = &stcb->asoc; 11313 chk->send_size = sizeof(struct sctp_ecne_chunk); 11314 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11315 if (chk->data == NULL) { 11316 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11317 return; 11318 } 11319 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11320 SCTP_BUF_LEN(chk->data) = chk->send_size; 11321 chk->sent = SCTP_DATAGRAM_UNSENT; 11322 chk->snd_count = 0; 11323 chk->whoTo = net; 11324 atomic_add_int(&chk->whoTo->ref_count, 1); 11325 11326 stcb->asoc.ecn_echo_cnt_onq++; 11327 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 11328 ecne->ch.chunk_type = SCTP_ECN_ECHO; 11329 ecne->ch.chunk_flags = 0; 11330 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk)); 11331 ecne->tsn = htonl(high_tsn); 11332 ecne->num_pkts_since_cwr = htonl(1); 11333 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next); 11334 asoc->ctrl_queue_cnt++; 11335} 11336 11337void 11338sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net, 11339 struct mbuf *m, int len, int iphlen, int bad_crc) 11340{ 11341 struct sctp_association *asoc; 11342 struct sctp_pktdrop_chunk *drp; 11343 struct sctp_tmit_chunk *chk; 11344 uint8_t *datap; 11345 int was_trunc = 0; 11346 int fullsz = 0; 11347 long spc; 11348 int offset; 11349 struct sctp_chunkhdr *ch, chunk_buf; 11350 unsigned int chk_length; 11351 11352 if (!stcb) { 11353 return; 11354 } 11355 asoc = &stcb->asoc; 11356 SCTP_TCB_LOCK_ASSERT(stcb); 11357 if (asoc->pktdrop_supported == 0) { 11358 /*- 11359 * peer must declare support before I send one. 11360 */ 11361 return; 11362 } 11363 if (stcb->sctp_socket == NULL) { 11364 return; 11365 } 11366 sctp_alloc_a_chunk(stcb, chk); 11367 if (chk == NULL) { 11368 return; 11369 } 11370 chk->copy_by_ref = 0; 11371 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED; 11372 chk->rec.chunk_id.can_take_data = 1; 11373 chk->flags = 0; 11374 len -= iphlen; 11375 chk->send_size = len; 11376 /* Validate that we do not have an ABORT in here. */ 11377 offset = iphlen + sizeof(struct sctphdr); 11378 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, 11379 sizeof(*ch), (uint8_t *) & chunk_buf); 11380 while (ch != NULL) { 11381 chk_length = ntohs(ch->chunk_length); 11382 if (chk_length < sizeof(*ch)) { 11383 /* break to abort land */ 11384 break; 11385 } 11386 switch (ch->chunk_type) { 11387 case SCTP_PACKET_DROPPED: 11388 case SCTP_ABORT_ASSOCIATION: 11389 case SCTP_INITIATION_ACK: 11390 /** 11391 * We don't respond with an PKT-DROP to an ABORT 11392 * or PKT-DROP. We also do not respond to an 11393 * INIT-ACK, because we can't know if the initiation 11394 * tag is correct or not. 11395 */ 11396 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11397 return; 11398 default: 11399 break; 11400 } 11401 offset += SCTP_SIZE32(chk_length); 11402 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, 11403 sizeof(*ch), (uint8_t *) & chunk_buf); 11404 } 11405 11406 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) > 11407 min(stcb->asoc.smallest_mtu, MCLBYTES)) { 11408 /* 11409 * only send 1 mtu worth, trim off the excess on the end. 11410 */ 11411 fullsz = len; 11412 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD; 11413 was_trunc = 1; 11414 } 11415 chk->asoc = &stcb->asoc; 11416 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 11417 if (chk->data == NULL) { 11418jump_out: 11419 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11420 return; 11421 } 11422 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11423 drp = mtod(chk->data, struct sctp_pktdrop_chunk *); 11424 if (drp == NULL) { 11425 sctp_m_freem(chk->data); 11426 chk->data = NULL; 11427 goto jump_out; 11428 } 11429 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) + 11430 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD)); 11431 chk->book_size_scale = 0; 11432 if (was_trunc) { 11433 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED; 11434 drp->trunc_len = htons(fullsz); 11435 /* 11436 * Len is already adjusted to size minus overhead above take 11437 * out the pkt_drop chunk itself from it. 11438 */ 11439 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk); 11440 len = chk->send_size; 11441 } else { 11442 /* no truncation needed */ 11443 drp->ch.chunk_flags = 0; 11444 drp->trunc_len = htons(0); 11445 } 11446 if (bad_crc) { 11447 drp->ch.chunk_flags |= SCTP_BADCRC; 11448 } 11449 chk->send_size += sizeof(struct sctp_pktdrop_chunk); 11450 SCTP_BUF_LEN(chk->data) = chk->send_size; 11451 chk->sent = SCTP_DATAGRAM_UNSENT; 11452 chk->snd_count = 0; 11453 if (net) { 11454 /* we should hit here */ 11455 chk->whoTo = net; 11456 atomic_add_int(&chk->whoTo->ref_count, 1); 11457 } else { 11458 chk->whoTo = NULL; 11459 } 11460 drp->ch.chunk_type = SCTP_PACKET_DROPPED; 11461 drp->ch.chunk_length = htons(chk->send_size); 11462 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket); 11463 if (spc < 0) { 11464 spc = 0; 11465 } 11466 drp->bottle_bw = htonl(spc); 11467 if (asoc->my_rwnd) { 11468 drp->current_onq = htonl(asoc->size_on_reasm_queue + 11469 asoc->size_on_all_streams + 11470 asoc->my_rwnd_control_len + 11471 stcb->sctp_socket->so_rcv.sb_cc); 11472 } else { 11473 /*- 11474 * If my rwnd is 0, possibly from mbuf depletion as well as 11475 * space used, tell the peer there is NO space aka onq == bw 11476 */ 11477 drp->current_onq = htonl(spc); 11478 } 11479 drp->reserved = 0; 11480 datap = drp->data; 11481 m_copydata(m, iphlen, len, (caddr_t)datap); 11482 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11483 asoc->ctrl_queue_cnt++; 11484} 11485 11486void 11487sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override) 11488{ 11489 struct sctp_association *asoc; 11490 struct sctp_cwr_chunk *cwr; 11491 struct sctp_tmit_chunk *chk; 11492 11493 SCTP_TCB_LOCK_ASSERT(stcb); 11494 if (net == NULL) { 11495 return; 11496 } 11497 asoc = &stcb->asoc; 11498 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 11499 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) { 11500 /* 11501 * found a previous CWR queued to same destination 11502 * update it if needed 11503 */ 11504 uint32_t ctsn; 11505 11506 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 11507 ctsn = ntohl(cwr->tsn); 11508 if (SCTP_TSN_GT(high_tsn, ctsn)) { 11509 cwr->tsn = htonl(high_tsn); 11510 } 11511 if (override & SCTP_CWR_REDUCE_OVERRIDE) { 11512 /* Make sure override is carried */ 11513 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE; 11514 } 11515 return; 11516 } 11517 } 11518 sctp_alloc_a_chunk(stcb, chk); 11519 if (chk == NULL) { 11520 return; 11521 } 11522 chk->copy_by_ref = 0; 11523 chk->rec.chunk_id.id = SCTP_ECN_CWR; 11524 chk->rec.chunk_id.can_take_data = 1; 11525 chk->flags = 0; 11526 chk->asoc = &stcb->asoc; 11527 chk->send_size = sizeof(struct sctp_cwr_chunk); 11528 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11529 if (chk->data == NULL) { 11530 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11531 return; 11532 } 11533 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11534 SCTP_BUF_LEN(chk->data) = chk->send_size; 11535 chk->sent = SCTP_DATAGRAM_UNSENT; 11536 chk->snd_count = 0; 11537 chk->whoTo = net; 11538 atomic_add_int(&chk->whoTo->ref_count, 1); 11539 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 11540 cwr->ch.chunk_type = SCTP_ECN_CWR; 11541 cwr->ch.chunk_flags = override; 11542 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk)); 11543 cwr->tsn = htonl(high_tsn); 11544 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11545 asoc->ctrl_queue_cnt++; 11546} 11547 11548void 11549sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk, 11550 int number_entries, uint16_t * list, 11551 uint32_t seq, uint32_t resp_seq, uint32_t last_sent) 11552{ 11553 uint16_t len, old_len, i; 11554 struct sctp_stream_reset_out_request *req_out; 11555 struct sctp_chunkhdr *ch; 11556 11557 ch = mtod(chk->data, struct sctp_chunkhdr *); 11558 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11559 11560 /* get to new offset for the param. */ 11561 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len); 11562 /* now how long will this param be? */ 11563 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries)); 11564 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST); 11565 req_out->ph.param_length = htons(len); 11566 req_out->request_seq = htonl(seq); 11567 req_out->response_seq = htonl(resp_seq); 11568 req_out->send_reset_at_tsn = htonl(last_sent); 11569 if (number_entries) { 11570 for (i = 0; i < number_entries; i++) { 11571 req_out->list_of_streams[i] = htons(list[i]); 11572 } 11573 } 11574 if (SCTP_SIZE32(len) > len) { 11575 /*- 11576 * Need to worry about the pad we may end up adding to the 11577 * end. This is easy since the struct is either aligned to 4 11578 * bytes or 2 bytes off. 11579 */ 11580 req_out->list_of_streams[number_entries] = 0; 11581 } 11582 /* now fix the chunk length */ 11583 ch->chunk_length = htons(len + old_len); 11584 chk->book_size = len + old_len; 11585 chk->book_size_scale = 0; 11586 chk->send_size = SCTP_SIZE32(chk->book_size); 11587 SCTP_BUF_LEN(chk->data) = chk->send_size; 11588 return; 11589} 11590 11591static void 11592sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk, 11593 int number_entries, uint16_t * list, 11594 uint32_t seq) 11595{ 11596 uint16_t len, old_len, i; 11597 struct sctp_stream_reset_in_request *req_in; 11598 struct sctp_chunkhdr *ch; 11599 11600 ch = mtod(chk->data, struct sctp_chunkhdr *); 11601 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11602 11603 /* get to new offset for the param. */ 11604 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len); 11605 /* now how long will this param be? */ 11606 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries)); 11607 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST); 11608 req_in->ph.param_length = htons(len); 11609 req_in->request_seq = htonl(seq); 11610 if (number_entries) { 11611 for (i = 0; i < number_entries; i++) { 11612 req_in->list_of_streams[i] = htons(list[i]); 11613 } 11614 } 11615 if (SCTP_SIZE32(len) > len) { 11616 /*- 11617 * Need to worry about the pad we may end up adding to the 11618 * end. This is easy since the struct is either aligned to 4 11619 * bytes or 2 bytes off. 11620 */ 11621 req_in->list_of_streams[number_entries] = 0; 11622 } 11623 /* now fix the chunk length */ 11624 ch->chunk_length = htons(len + old_len); 11625 chk->book_size = len + old_len; 11626 chk->book_size_scale = 0; 11627 chk->send_size = SCTP_SIZE32(chk->book_size); 11628 SCTP_BUF_LEN(chk->data) = chk->send_size; 11629 return; 11630} 11631 11632static void 11633sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk, 11634 uint32_t seq) 11635{ 11636 uint16_t len, old_len; 11637 struct sctp_stream_reset_tsn_request *req_tsn; 11638 struct sctp_chunkhdr *ch; 11639 11640 ch = mtod(chk->data, struct sctp_chunkhdr *); 11641 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11642 11643 /* get to new offset for the param. */ 11644 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len); 11645 /* now how long will this param be? */ 11646 len = sizeof(struct sctp_stream_reset_tsn_request); 11647 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST); 11648 req_tsn->ph.param_length = htons(len); 11649 req_tsn->request_seq = htonl(seq); 11650 11651 /* now fix the chunk length */ 11652 ch->chunk_length = htons(len + old_len); 11653 chk->send_size = len + old_len; 11654 chk->book_size = SCTP_SIZE32(chk->send_size); 11655 chk->book_size_scale = 0; 11656 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11657 return; 11658} 11659 11660void 11661sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk, 11662 uint32_t resp_seq, uint32_t result) 11663{ 11664 uint16_t len, old_len; 11665 struct sctp_stream_reset_response *resp; 11666 struct sctp_chunkhdr *ch; 11667 11668 ch = mtod(chk->data, struct sctp_chunkhdr *); 11669 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11670 11671 /* get to new offset for the param. */ 11672 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len); 11673 /* now how long will this param be? */ 11674 len = sizeof(struct sctp_stream_reset_response); 11675 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 11676 resp->ph.param_length = htons(len); 11677 resp->response_seq = htonl(resp_seq); 11678 resp->result = ntohl(result); 11679 11680 /* now fix the chunk length */ 11681 ch->chunk_length = htons(len + old_len); 11682 chk->book_size = len + old_len; 11683 chk->book_size_scale = 0; 11684 chk->send_size = SCTP_SIZE32(chk->book_size); 11685 SCTP_BUF_LEN(chk->data) = chk->send_size; 11686 return; 11687} 11688 11689void 11690sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk, 11691 uint32_t resp_seq, uint32_t result, 11692 uint32_t send_una, uint32_t recv_next) 11693{ 11694 uint16_t len, old_len; 11695 struct sctp_stream_reset_response_tsn *resp; 11696 struct sctp_chunkhdr *ch; 11697 11698 ch = mtod(chk->data, struct sctp_chunkhdr *); 11699 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11700 11701 /* get to new offset for the param. */ 11702 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len); 11703 /* now how long will this param be? */ 11704 len = sizeof(struct sctp_stream_reset_response_tsn); 11705 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 11706 resp->ph.param_length = htons(len); 11707 resp->response_seq = htonl(resp_seq); 11708 resp->result = htonl(result); 11709 resp->senders_next_tsn = htonl(send_una); 11710 resp->receivers_next_tsn = htonl(recv_next); 11711 11712 /* now fix the chunk length */ 11713 ch->chunk_length = htons(len + old_len); 11714 chk->book_size = len + old_len; 11715 chk->send_size = SCTP_SIZE32(chk->book_size); 11716 chk->book_size_scale = 0; 11717 SCTP_BUF_LEN(chk->data) = chk->send_size; 11718 return; 11719} 11720 11721static void 11722sctp_add_an_out_stream(struct sctp_tmit_chunk *chk, 11723 uint32_t seq, 11724 uint16_t adding) 11725{ 11726 uint16_t len, old_len; 11727 struct sctp_chunkhdr *ch; 11728 struct sctp_stream_reset_add_strm *addstr; 11729 11730 ch = mtod(chk->data, struct sctp_chunkhdr *); 11731 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11732 11733 /* get to new offset for the param. */ 11734 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len); 11735 /* now how long will this param be? */ 11736 len = sizeof(struct sctp_stream_reset_add_strm); 11737 11738 /* Fill it out. */ 11739 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS); 11740 addstr->ph.param_length = htons(len); 11741 addstr->request_seq = htonl(seq); 11742 addstr->number_of_streams = htons(adding); 11743 addstr->reserved = 0; 11744 11745 /* now fix the chunk length */ 11746 ch->chunk_length = htons(len + old_len); 11747 chk->send_size = len + old_len; 11748 chk->book_size = SCTP_SIZE32(chk->send_size); 11749 chk->book_size_scale = 0; 11750 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11751 return; 11752} 11753 11754static void 11755sctp_add_an_in_stream(struct sctp_tmit_chunk *chk, 11756 uint32_t seq, 11757 uint16_t adding) 11758{ 11759 uint16_t len, old_len; 11760 struct sctp_chunkhdr *ch; 11761 struct sctp_stream_reset_add_strm *addstr; 11762 11763 ch = mtod(chk->data, struct sctp_chunkhdr *); 11764 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11765 11766 /* get to new offset for the param. */ 11767 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len); 11768 /* now how long will this param be? */ 11769 len = sizeof(struct sctp_stream_reset_add_strm); 11770 /* Fill it out. */ 11771 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS); 11772 addstr->ph.param_length = htons(len); 11773 addstr->request_seq = htonl(seq); 11774 addstr->number_of_streams = htons(adding); 11775 addstr->reserved = 0; 11776 11777 /* now fix the chunk length */ 11778 ch->chunk_length = htons(len + old_len); 11779 chk->send_size = len + old_len; 11780 chk->book_size = SCTP_SIZE32(chk->send_size); 11781 chk->book_size_scale = 0; 11782 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11783 return; 11784} 11785 11786int 11787sctp_send_str_reset_req(struct sctp_tcb *stcb, 11788 uint16_t number_entries, uint16_t * list, 11789 uint8_t send_out_req, 11790 uint8_t send_in_req, 11791 uint8_t send_tsn_req, 11792 uint8_t add_stream, 11793 uint16_t adding_o, 11794 uint16_t adding_i, uint8_t peer_asked) 11795{ 11796 11797 struct sctp_association *asoc; 11798 struct sctp_tmit_chunk *chk; 11799 struct sctp_chunkhdr *ch; 11800 uint32_t seq; 11801 11802 asoc = &stcb->asoc; 11803 if (asoc->stream_reset_outstanding) { 11804 /*- 11805 * Already one pending, must get ACK back to clear the flag. 11806 */ 11807 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY); 11808 return (EBUSY); 11809 } 11810 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) && 11811 (add_stream == 0)) { 11812 /* nothing to do */ 11813 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 11814 return (EINVAL); 11815 } 11816 if (send_tsn_req && (send_out_req || send_in_req)) { 11817 /* error, can't do that */ 11818 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 11819 return (EINVAL); 11820 } 11821 if (number_entries > (MCLBYTES - 11822 SCTP_MIN_OVERHEAD - 11823 sizeof(struct sctp_chunkhdr) - 11824 sizeof(struct sctp_stream_reset_out_request)) / 11825 sizeof(uint16_t)) { 11826 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11827 return (ENOMEM); 11828 } 11829 sctp_alloc_a_chunk(stcb, chk); 11830 if (chk == NULL) { 11831 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11832 return (ENOMEM); 11833 } 11834 chk->copy_by_ref = 0; 11835 chk->rec.chunk_id.id = SCTP_STREAM_RESET; 11836 chk->rec.chunk_id.can_take_data = 0; 11837 chk->flags = 0; 11838 chk->asoc = &stcb->asoc; 11839 chk->book_size = sizeof(struct sctp_chunkhdr); 11840 chk->send_size = SCTP_SIZE32(chk->book_size); 11841 chk->book_size_scale = 0; 11842 11843 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 11844 if (chk->data == NULL) { 11845 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED); 11846 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11847 return (ENOMEM); 11848 } 11849 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11850 11851 /* setup chunk parameters */ 11852 chk->sent = SCTP_DATAGRAM_UNSENT; 11853 chk->snd_count = 0; 11854 if (stcb->asoc.alternate) { 11855 chk->whoTo = stcb->asoc.alternate; 11856 } else { 11857 chk->whoTo = stcb->asoc.primary_destination; 11858 } 11859 atomic_add_int(&chk->whoTo->ref_count, 1); 11860 ch = mtod(chk->data, struct sctp_chunkhdr *); 11861 ch->chunk_type = SCTP_STREAM_RESET; 11862 ch->chunk_flags = 0; 11863 ch->chunk_length = htons(chk->book_size); 11864 SCTP_BUF_LEN(chk->data) = chk->send_size; 11865 11866 seq = stcb->asoc.str_reset_seq_out; 11867 if (send_out_req) { 11868 sctp_add_stream_reset_out(chk, number_entries, list, 11869 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1)); 11870 asoc->stream_reset_out_is_outstanding = 1; 11871 seq++; 11872 asoc->stream_reset_outstanding++; 11873 } 11874 if ((add_stream & 1) && 11875 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) { 11876 /* Need to allocate more */ 11877 struct sctp_stream_out *oldstream; 11878 struct sctp_stream_queue_pending *sp, *nsp; 11879 int i; 11880 11881#if defined(SCTP_DETAILED_STR_STATS) 11882 int j; 11883 11884#endif 11885 11886 oldstream = stcb->asoc.strmout; 11887 /* get some more */ 11888 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *, 11889 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)), 11890 SCTP_M_STRMO); 11891 if (stcb->asoc.strmout == NULL) { 11892 uint8_t x; 11893 11894 stcb->asoc.strmout = oldstream; 11895 /* Turn off the bit */ 11896 x = add_stream & 0xfe; 11897 add_stream = x; 11898 goto skip_stuff; 11899 } 11900 /* 11901 * Ok now we proceed with copying the old out stuff and 11902 * initializing the new stuff. 11903 */ 11904 SCTP_TCB_SEND_LOCK(stcb); 11905 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1); 11906 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 11907 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 11908 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues; 11909 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send; 11910 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete; 11911 stcb->asoc.strmout[i].stream_no = i; 11912 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]); 11913 /* now anything on those queues? */ 11914 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) { 11915 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next); 11916 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next); 11917 } 11918 /* Now move assoc pointers too */ 11919 if (stcb->asoc.last_out_stream == &oldstream[i]) { 11920 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i]; 11921 } 11922 if (stcb->asoc.locked_on_sending == &oldstream[i]) { 11923 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i]; 11924 } 11925 } 11926 /* now the new streams */ 11927 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1); 11928 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) { 11929 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 11930 stcb->asoc.strmout[i].chunks_on_queues = 0; 11931#if defined(SCTP_DETAILED_STR_STATS) 11932 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) { 11933 stcb->asoc.strmout[i].abandoned_sent[j] = 0; 11934 stcb->asoc.strmout[i].abandoned_unsent[j] = 0; 11935 } 11936#else 11937 stcb->asoc.strmout[i].abandoned_sent[0] = 0; 11938 stcb->asoc.strmout[i].abandoned_unsent[0] = 0; 11939#endif 11940 stcb->asoc.strmout[i].next_sequence_send = 0x0; 11941 stcb->asoc.strmout[i].stream_no = i; 11942 stcb->asoc.strmout[i].last_msg_incomplete = 0; 11943 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL); 11944 } 11945 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o; 11946 SCTP_FREE(oldstream, SCTP_M_STRMO); 11947 SCTP_TCB_SEND_UNLOCK(stcb); 11948 } 11949skip_stuff: 11950 if ((add_stream & 1) && (adding_o > 0)) { 11951 asoc->strm_pending_add_size = adding_o; 11952 asoc->peer_req_out = peer_asked; 11953 sctp_add_an_out_stream(chk, seq, adding_o); 11954 seq++; 11955 asoc->stream_reset_outstanding++; 11956 } 11957 if ((add_stream & 2) && (adding_i > 0)) { 11958 sctp_add_an_in_stream(chk, seq, adding_i); 11959 seq++; 11960 asoc->stream_reset_outstanding++; 11961 } 11962 if (send_in_req) { 11963 sctp_add_stream_reset_in(chk, number_entries, list, seq); 11964 seq++; 11965 asoc->stream_reset_outstanding++; 11966 } 11967 if (send_tsn_req) { 11968 sctp_add_stream_reset_tsn(chk, seq); 11969 asoc->stream_reset_outstanding++; 11970 } 11971 asoc->str_reset = chk; 11972 /* insert the chunk for sending */ 11973 TAILQ_INSERT_TAIL(&asoc->control_send_queue, 11974 chk, 11975 sctp_next); 11976 asoc->ctrl_queue_cnt++; 11977 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 11978 return (0); 11979} 11980 11981void 11982sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst, 11983 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, 11984 uint8_t mflowtype, uint32_t mflowid, 11985 uint32_t vrf_id, uint16_t port) 11986{ 11987 /* Don't respond to an ABORT with an ABORT. */ 11988 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) { 11989 if (cause) 11990 sctp_m_freem(cause); 11991 return; 11992 } 11993 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause, 11994 mflowtype, mflowid, 11995 vrf_id, port); 11996 return; 11997} 11998 11999void 12000sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst, 12001 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, 12002 uint8_t mflowtype, uint32_t mflowid, 12003 uint32_t vrf_id, uint16_t port) 12004{ 12005 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause, 12006 mflowtype, mflowid, 12007 vrf_id, port); 12008 return; 12009} 12010 12011static struct mbuf * 12012sctp_copy_resume(struct uio *uio, 12013 int max_send_len, 12014 int user_marks_eor, 12015 int *error, 12016 uint32_t * sndout, 12017 struct mbuf **new_tail) 12018{ 12019 struct mbuf *m; 12020 12021 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0, 12022 (M_PKTHDR | (user_marks_eor ? M_EOR : 0))); 12023 if (m == NULL) { 12024 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); 12025 *error = ENOBUFS; 12026 } else { 12027 *sndout = m_length(m, NULL); 12028 *new_tail = m_last(m); 12029 } 12030 return (m); 12031} 12032 12033static int 12034sctp_copy_one(struct sctp_stream_queue_pending *sp, 12035 struct uio *uio, 12036 int resv_upfront) 12037{ 12038 int left; 12039 12040 left = sp->length; 12041 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length, 12042 resv_upfront, 0); 12043 if (sp->data == NULL) { 12044 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); 12045 return (ENOBUFS); 12046 } 12047 sp->tail_mbuf = m_last(sp->data); 12048 return (0); 12049} 12050 12051 12052 12053static struct sctp_stream_queue_pending * 12054sctp_copy_it_in(struct sctp_tcb *stcb, 12055 struct sctp_association *asoc, 12056 struct sctp_sndrcvinfo *srcv, 12057 struct uio *uio, 12058 struct sctp_nets *net, 12059 int max_send_len, 12060 int user_marks_eor, 12061 int *error) 12062{ 12063 /*- 12064 * This routine must be very careful in its work. Protocol 12065 * processing is up and running so care must be taken to spl...() 12066 * when you need to do something that may effect the stcb/asoc. The 12067 * sb is locked however. When data is copied the protocol processing 12068 * should be enabled since this is a slower operation... 12069 */ 12070 struct sctp_stream_queue_pending *sp = NULL; 12071 int resv_in_first; 12072 12073 *error = 0; 12074 /* Now can we send this? */ 12075 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 12076 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 12077 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 12078 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 12079 /* got data while shutting down */ 12080 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12081 *error = ECONNRESET; 12082 goto out_now; 12083 } 12084 sctp_alloc_a_strmoq(stcb, sp); 12085 if (sp == NULL) { 12086 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12087 *error = ENOMEM; 12088 goto out_now; 12089 } 12090 sp->act_flags = 0; 12091 sp->sender_all_done = 0; 12092 sp->sinfo_flags = srcv->sinfo_flags; 12093 sp->timetolive = srcv->sinfo_timetolive; 12094 sp->ppid = srcv->sinfo_ppid; 12095 sp->context = srcv->sinfo_context; 12096 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 12097 12098 sp->stream = srcv->sinfo_stream; 12099 sp->length = min(uio->uio_resid, max_send_len); 12100 if ((sp->length == (uint32_t) uio->uio_resid) && 12101 ((user_marks_eor == 0) || 12102 (srcv->sinfo_flags & SCTP_EOF) || 12103 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { 12104 sp->msg_is_complete = 1; 12105 } else { 12106 sp->msg_is_complete = 0; 12107 } 12108 sp->sender_all_done = 0; 12109 sp->some_taken = 0; 12110 sp->put_last_out = 0; 12111 resv_in_first = sizeof(struct sctp_data_chunk); 12112 sp->data = sp->tail_mbuf = NULL; 12113 if (sp->length == 0) { 12114 *error = 0; 12115 goto skip_copy; 12116 } 12117 if (srcv->sinfo_keynumber_valid) { 12118 sp->auth_keyid = srcv->sinfo_keynumber; 12119 } else { 12120 sp->auth_keyid = stcb->asoc.authinfo.active_keyid; 12121 } 12122 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { 12123 sctp_auth_key_acquire(stcb, sp->auth_keyid); 12124 sp->holds_key_ref = 1; 12125 } 12126 *error = sctp_copy_one(sp, uio, resv_in_first); 12127skip_copy: 12128 if (*error) { 12129 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 12130 sp = NULL; 12131 } else { 12132 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 12133 sp->net = net; 12134 atomic_add_int(&sp->net->ref_count, 1); 12135 } else { 12136 sp->net = NULL; 12137 } 12138 sctp_set_prsctp_policy(sp); 12139 } 12140out_now: 12141 return (sp); 12142} 12143 12144 12145int 12146sctp_sosend(struct socket *so, 12147 struct sockaddr *addr, 12148 struct uio *uio, 12149 struct mbuf *top, 12150 struct mbuf *control, 12151 int flags, 12152 struct thread *p 12153) 12154{ 12155 int error, use_sndinfo = 0; 12156 struct sctp_sndrcvinfo sndrcvninfo; 12157 struct sockaddr *addr_to_use; 12158 12159#if defined(INET) && defined(INET6) 12160 struct sockaddr_in sin; 12161 12162#endif 12163 12164 if (control) { 12165 /* process cmsg snd/rcv info (maybe a assoc-id) */ 12166 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control, 12167 sizeof(sndrcvninfo))) { 12168 /* got one */ 12169 use_sndinfo = 1; 12170 } 12171 } 12172 addr_to_use = addr; 12173#if defined(INET) && defined(INET6) 12174 if ((addr) && (addr->sa_family == AF_INET6)) { 12175 struct sockaddr_in6 *sin6; 12176 12177 sin6 = (struct sockaddr_in6 *)addr; 12178 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 12179 in6_sin6_2_sin(&sin, sin6); 12180 addr_to_use = (struct sockaddr *)&sin; 12181 } 12182 } 12183#endif 12184 error = sctp_lower_sosend(so, addr_to_use, uio, top, 12185 control, 12186 flags, 12187 use_sndinfo ? &sndrcvninfo : NULL 12188 ,p 12189 ); 12190 return (error); 12191} 12192 12193 12194int 12195sctp_lower_sosend(struct socket *so, 12196 struct sockaddr *addr, 12197 struct uio *uio, 12198 struct mbuf *i_pak, 12199 struct mbuf *control, 12200 int flags, 12201 struct sctp_sndrcvinfo *srcv 12202 , 12203 struct thread *p 12204) 12205{ 12206 unsigned int sndlen = 0, max_len; 12207 int error, len; 12208 struct mbuf *top = NULL; 12209 int queue_only = 0, queue_only_for_init = 0; 12210 int free_cnt_applied = 0; 12211 int un_sent; 12212 int now_filled = 0; 12213 unsigned int inqueue_bytes = 0; 12214 struct sctp_block_entry be; 12215 struct sctp_inpcb *inp; 12216 struct sctp_tcb *stcb = NULL; 12217 struct timeval now; 12218 struct sctp_nets *net; 12219 struct sctp_association *asoc; 12220 struct sctp_inpcb *t_inp; 12221 int user_marks_eor; 12222 int create_lock_applied = 0; 12223 int nagle_applies = 0; 12224 int some_on_control = 0; 12225 int got_all_of_the_send = 0; 12226 int hold_tcblock = 0; 12227 int non_blocking = 0; 12228 uint32_t local_add_more, local_soresv = 0; 12229 uint16_t port; 12230 uint16_t sinfo_flags; 12231 sctp_assoc_t sinfo_assoc_id; 12232 12233 error = 0; 12234 net = NULL; 12235 stcb = NULL; 12236 asoc = NULL; 12237 12238 t_inp = inp = (struct sctp_inpcb *)so->so_pcb; 12239 if (inp == NULL) { 12240 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12241 error = EINVAL; 12242 if (i_pak) { 12243 SCTP_RELEASE_PKT(i_pak); 12244 } 12245 return (error); 12246 } 12247 if ((uio == NULL) && (i_pak == NULL)) { 12248 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12249 return (EINVAL); 12250 } 12251 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR); 12252 atomic_add_int(&inp->total_sends, 1); 12253 if (uio) { 12254 if (uio->uio_resid < 0) { 12255 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12256 return (EINVAL); 12257 } 12258 sndlen = uio->uio_resid; 12259 } else { 12260 top = SCTP_HEADER_TO_CHAIN(i_pak); 12261 sndlen = SCTP_HEADER_LEN(i_pak); 12262 } 12263 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n", 12264 (void *)addr, 12265 sndlen); 12266 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 12267 (inp->sctp_socket->so_qlimit)) { 12268 /* The listener can NOT send */ 12269 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); 12270 error = ENOTCONN; 12271 goto out_unlocked; 12272 } 12273 /** 12274 * Pre-screen address, if one is given the sin-len 12275 * must be set correctly! 12276 */ 12277 if (addr) { 12278 union sctp_sockstore *raddr = (union sctp_sockstore *)addr; 12279 12280 switch (raddr->sa.sa_family) { 12281#ifdef INET 12282 case AF_INET: 12283 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) { 12284 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12285 error = EINVAL; 12286 goto out_unlocked; 12287 } 12288 port = raddr->sin.sin_port; 12289 break; 12290#endif 12291#ifdef INET6 12292 case AF_INET6: 12293 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) { 12294 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12295 error = EINVAL; 12296 goto out_unlocked; 12297 } 12298 port = raddr->sin6.sin6_port; 12299 break; 12300#endif 12301 default: 12302 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT); 12303 error = EAFNOSUPPORT; 12304 goto out_unlocked; 12305 } 12306 } else 12307 port = 0; 12308 12309 if (srcv) { 12310 sinfo_flags = srcv->sinfo_flags; 12311 sinfo_assoc_id = srcv->sinfo_assoc_id; 12312 if (INVALID_SINFO_FLAG(sinfo_flags) || 12313 PR_SCTP_INVALID_POLICY(sinfo_flags)) { 12314 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12315 error = EINVAL; 12316 goto out_unlocked; 12317 } 12318 if (srcv->sinfo_flags) 12319 SCTP_STAT_INCR(sctps_sends_with_flags); 12320 } else { 12321 sinfo_flags = inp->def_send.sinfo_flags; 12322 sinfo_assoc_id = inp->def_send.sinfo_assoc_id; 12323 } 12324 if (sinfo_flags & SCTP_SENDALL) { 12325 /* its a sendall */ 12326 error = sctp_sendall(inp, uio, top, srcv); 12327 top = NULL; 12328 goto out_unlocked; 12329 } 12330 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) { 12331 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12332 error = EINVAL; 12333 goto out_unlocked; 12334 } 12335 /* now we must find the assoc */ 12336 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) || 12337 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 12338 SCTP_INP_RLOCK(inp); 12339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 12340 if (stcb) { 12341 SCTP_TCB_LOCK(stcb); 12342 hold_tcblock = 1; 12343 } 12344 SCTP_INP_RUNLOCK(inp); 12345 } else if (sinfo_assoc_id) { 12346 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0); 12347 } else if (addr) { 12348 /*- 12349 * Since we did not use findep we must 12350 * increment it, and if we don't find a tcb 12351 * decrement it. 12352 */ 12353 SCTP_INP_WLOCK(inp); 12354 SCTP_INP_INCR_REF(inp); 12355 SCTP_INP_WUNLOCK(inp); 12356 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 12357 if (stcb == NULL) { 12358 SCTP_INP_WLOCK(inp); 12359 SCTP_INP_DECR_REF(inp); 12360 SCTP_INP_WUNLOCK(inp); 12361 } else { 12362 hold_tcblock = 1; 12363 } 12364 } 12365 if ((stcb == NULL) && (addr)) { 12366 /* Possible implicit send? */ 12367 SCTP_ASOC_CREATE_LOCK(inp); 12368 create_lock_applied = 1; 12369 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || 12370 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 12371 /* Should I really unlock ? */ 12372 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12373 error = EINVAL; 12374 goto out_unlocked; 12375 12376 } 12377 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) && 12378 (addr->sa_family == AF_INET6)) { 12379 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12380 error = EINVAL; 12381 goto out_unlocked; 12382 } 12383 SCTP_INP_WLOCK(inp); 12384 SCTP_INP_INCR_REF(inp); 12385 SCTP_INP_WUNLOCK(inp); 12386 /* With the lock applied look again */ 12387 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 12388 if ((stcb == NULL) && (control != NULL) && (port > 0)) { 12389 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error); 12390 } 12391 if (stcb == NULL) { 12392 SCTP_INP_WLOCK(inp); 12393 SCTP_INP_DECR_REF(inp); 12394 SCTP_INP_WUNLOCK(inp); 12395 } else { 12396 hold_tcblock = 1; 12397 } 12398 if (error) { 12399 goto out_unlocked; 12400 } 12401 if (t_inp != inp) { 12402 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); 12403 error = ENOTCONN; 12404 goto out_unlocked; 12405 } 12406 } 12407 if (stcb == NULL) { 12408 if (addr == NULL) { 12409 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); 12410 error = ENOENT; 12411 goto out_unlocked; 12412 } else { 12413 /* We must go ahead and start the INIT process */ 12414 uint32_t vrf_id; 12415 12416 if ((sinfo_flags & SCTP_ABORT) || 12417 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) { 12418 /*- 12419 * User asks to abort a non-existant assoc, 12420 * or EOF a non-existant assoc with no data 12421 */ 12422 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); 12423 error = ENOENT; 12424 goto out_unlocked; 12425 } 12426 /* get an asoc/stcb struct */ 12427 vrf_id = inp->def_vrf_id; 12428#ifdef INVARIANTS 12429 if (create_lock_applied == 0) { 12430 panic("Error, should hold create lock and I don't?"); 12431 } 12432#endif 12433 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 12434 p 12435 ); 12436 if (stcb == NULL) { 12437 /* Error is setup for us in the call */ 12438 goto out_unlocked; 12439 } 12440 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 12441 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 12442 /* 12443 * Set the connected flag so we can queue 12444 * data 12445 */ 12446 soisconnecting(so); 12447 } 12448 hold_tcblock = 1; 12449 if (create_lock_applied) { 12450 SCTP_ASOC_CREATE_UNLOCK(inp); 12451 create_lock_applied = 0; 12452 } else { 12453 SCTP_PRINTF("Huh-3? create lock should have been on??\n"); 12454 } 12455 /* 12456 * Turn on queue only flag to prevent data from 12457 * being sent 12458 */ 12459 queue_only = 1; 12460 asoc = &stcb->asoc; 12461 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); 12462 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 12463 12464 /* initialize authentication params for the assoc */ 12465 sctp_initialize_auth_params(inp, stcb); 12466 12467 if (control) { 12468 if (sctp_process_cmsgs_for_init(stcb, control, &error)) { 12469 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7); 12470 hold_tcblock = 0; 12471 stcb = NULL; 12472 goto out_unlocked; 12473 } 12474 } 12475 /* out with the INIT */ 12476 queue_only_for_init = 1; 12477 /*- 12478 * we may want to dig in after this call and adjust the MTU 12479 * value. It defaulted to 1500 (constant) but the ro 12480 * structure may now have an update and thus we may need to 12481 * change it BEFORE we append the message. 12482 */ 12483 } 12484 } else 12485 asoc = &stcb->asoc; 12486 if (srcv == NULL) 12487 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send; 12488 if (srcv->sinfo_flags & SCTP_ADDR_OVER) { 12489 if (addr) 12490 net = sctp_findnet(stcb, addr); 12491 else 12492 net = NULL; 12493 if ((net == NULL) || 12494 ((port != 0) && (port != stcb->rport))) { 12495 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12496 error = EINVAL; 12497 goto out_unlocked; 12498 } 12499 } else { 12500 if (stcb->asoc.alternate) { 12501 net = stcb->asoc.alternate; 12502 } else { 12503 net = stcb->asoc.primary_destination; 12504 } 12505 } 12506 atomic_add_int(&stcb->total_sends, 1); 12507 /* Keep the stcb from being freed under our feet */ 12508 atomic_add_int(&asoc->refcnt, 1); 12509 free_cnt_applied = 1; 12510 12511 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) { 12512 if (sndlen > asoc->smallest_mtu) { 12513 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12514 error = EMSGSIZE; 12515 goto out_unlocked; 12516 } 12517 } 12518 if (SCTP_SO_IS_NBIO(so) 12519 || (flags & MSG_NBIO) 12520 ) { 12521 non_blocking = 1; 12522 } 12523 /* would we block? */ 12524 if (non_blocking) { 12525 if (hold_tcblock == 0) { 12526 SCTP_TCB_LOCK(stcb); 12527 hold_tcblock = 1; 12528 } 12529 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12530 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) || 12531 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12532 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK); 12533 if (sndlen > SCTP_SB_LIMIT_SND(so)) 12534 error = EMSGSIZE; 12535 else 12536 error = EWOULDBLOCK; 12537 goto out_unlocked; 12538 } 12539 stcb->asoc.sb_send_resv += sndlen; 12540 SCTP_TCB_UNLOCK(stcb); 12541 hold_tcblock = 0; 12542 } else { 12543 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen); 12544 } 12545 local_soresv = sndlen; 12546 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12547 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12548 error = ECONNRESET; 12549 goto out_unlocked; 12550 } 12551 if (create_lock_applied) { 12552 SCTP_ASOC_CREATE_UNLOCK(inp); 12553 create_lock_applied = 0; 12554 } 12555 if (asoc->stream_reset_outstanding) { 12556 /* 12557 * Can't queue any data while stream reset is underway. 12558 */ 12559 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN); 12560 error = EAGAIN; 12561 goto out_unlocked; 12562 } 12563 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 12564 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 12565 queue_only = 1; 12566 } 12567 /* we are now done with all control */ 12568 if (control) { 12569 sctp_m_freem(control); 12570 control = NULL; 12571 } 12572 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 12573 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 12574 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 12575 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 12576 if (srcv->sinfo_flags & SCTP_ABORT) { 12577 ; 12578 } else { 12579 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12580 error = ECONNRESET; 12581 goto out_unlocked; 12582 } 12583 } 12584 /* Ok, we will attempt a msgsnd :> */ 12585 if (p) { 12586 p->td_ru.ru_msgsnd++; 12587 } 12588 /* Are we aborting? */ 12589 if (srcv->sinfo_flags & SCTP_ABORT) { 12590 struct mbuf *mm; 12591 int tot_demand, tot_out = 0, max_out; 12592 12593 SCTP_STAT_INCR(sctps_sends_with_abort); 12594 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 12595 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 12596 /* It has to be up before we abort */ 12597 /* how big is the user initiated abort? */ 12598 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12599 error = EINVAL; 12600 goto out; 12601 } 12602 if (hold_tcblock) { 12603 SCTP_TCB_UNLOCK(stcb); 12604 hold_tcblock = 0; 12605 } 12606 if (top) { 12607 struct mbuf *cntm = NULL; 12608 12609 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA); 12610 if (sndlen != 0) { 12611 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) { 12612 tot_out += SCTP_BUF_LEN(cntm); 12613 } 12614 } 12615 } else { 12616 /* Must fit in a MTU */ 12617 tot_out = sndlen; 12618 tot_demand = (tot_out + sizeof(struct sctp_paramhdr)); 12619 if (tot_demand > SCTP_DEFAULT_ADD_MORE) { 12620 /* To big */ 12621 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12622 error = EMSGSIZE; 12623 goto out; 12624 } 12625 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA); 12626 } 12627 if (mm == NULL) { 12628 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12629 error = ENOMEM; 12630 goto out; 12631 } 12632 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr); 12633 max_out -= sizeof(struct sctp_abort_msg); 12634 if (tot_out > max_out) { 12635 tot_out = max_out; 12636 } 12637 if (mm) { 12638 struct sctp_paramhdr *ph; 12639 12640 /* now move forward the data pointer */ 12641 ph = mtod(mm, struct sctp_paramhdr *); 12642 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 12643 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out); 12644 ph++; 12645 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr); 12646 if (top == NULL) { 12647 error = uiomove((caddr_t)ph, (int)tot_out, uio); 12648 if (error) { 12649 /*- 12650 * Here if we can't get his data we 12651 * still abort we just don't get to 12652 * send the users note :-0 12653 */ 12654 sctp_m_freem(mm); 12655 mm = NULL; 12656 } 12657 } else { 12658 if (sndlen != 0) { 12659 SCTP_BUF_NEXT(mm) = top; 12660 } 12661 } 12662 } 12663 if (hold_tcblock == 0) { 12664 SCTP_TCB_LOCK(stcb); 12665 } 12666 atomic_add_int(&stcb->asoc.refcnt, -1); 12667 free_cnt_applied = 0; 12668 /* release this lock, otherwise we hang on ourselves */ 12669 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED); 12670 /* now relock the stcb so everything is sane */ 12671 hold_tcblock = 0; 12672 stcb = NULL; 12673 /* 12674 * In this case top is already chained to mm avoid double 12675 * free, since we free it below if top != NULL and driver 12676 * would free it after sending the packet out 12677 */ 12678 if (sndlen != 0) { 12679 top = NULL; 12680 } 12681 goto out_unlocked; 12682 } 12683 /* Calculate the maximum we can send */ 12684 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12685 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { 12686 if (non_blocking) { 12687 /* we already checked for non-blocking above. */ 12688 max_len = sndlen; 12689 } else { 12690 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 12691 } 12692 } else { 12693 max_len = 0; 12694 } 12695 if (hold_tcblock) { 12696 SCTP_TCB_UNLOCK(stcb); 12697 hold_tcblock = 0; 12698 } 12699 /* Is the stream no. valid? */ 12700 if (srcv->sinfo_stream >= asoc->streamoutcnt) { 12701 /* Invalid stream number */ 12702 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12703 error = EINVAL; 12704 goto out_unlocked; 12705 } 12706 if (asoc->strmout == NULL) { 12707 /* huh? software error */ 12708 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 12709 error = EFAULT; 12710 goto out_unlocked; 12711 } 12712 /* Unless E_EOR mode is on, we must make a send FIT in one call. */ 12713 if ((user_marks_eor == 0) && 12714 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) { 12715 /* It will NEVER fit */ 12716 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12717 error = EMSGSIZE; 12718 goto out_unlocked; 12719 } 12720 if ((uio == NULL) && user_marks_eor) { 12721 /*- 12722 * We do not support eeor mode for 12723 * sending with mbuf chains (like sendfile). 12724 */ 12725 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12726 error = EINVAL; 12727 goto out_unlocked; 12728 } 12729 if (user_marks_eor) { 12730 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold)); 12731 } else { 12732 /*- 12733 * For non-eeor the whole message must fit in 12734 * the socket send buffer. 12735 */ 12736 local_add_more = sndlen; 12737 } 12738 len = 0; 12739 if (non_blocking) { 12740 goto skip_preblock; 12741 } 12742 if (((max_len <= local_add_more) && 12743 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) || 12744 (max_len == 0) || 12745 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12746 /* No room right now ! */ 12747 SOCKBUF_LOCK(&so->so_snd); 12748 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12749 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) || 12750 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12751 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n", 12752 (unsigned int)SCTP_SB_LIMIT_SND(so), 12753 inqueue_bytes, 12754 local_add_more, 12755 stcb->asoc.stream_queue_cnt, 12756 stcb->asoc.chunks_on_out_queue, 12757 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue)); 12758 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 12759 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen); 12760 } 12761 be.error = 0; 12762 stcb->block_entry = &be; 12763 error = sbwait(&so->so_snd); 12764 stcb->block_entry = NULL; 12765 if (error || so->so_error || be.error) { 12766 if (error == 0) { 12767 if (so->so_error) 12768 error = so->so_error; 12769 if (be.error) { 12770 error = be.error; 12771 } 12772 } 12773 SOCKBUF_UNLOCK(&so->so_snd); 12774 goto out_unlocked; 12775 } 12776 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 12777 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 12778 asoc, stcb->asoc.total_output_queue_size); 12779 } 12780 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12781 goto out_unlocked; 12782 } 12783 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12784 } 12785 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { 12786 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 12787 } else { 12788 max_len = 0; 12789 } 12790 SOCKBUF_UNLOCK(&so->so_snd); 12791 } 12792skip_preblock: 12793 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12794 goto out_unlocked; 12795 } 12796 /* 12797 * sndlen covers for mbuf case uio_resid covers for the non-mbuf 12798 * case NOTE: uio will be null when top/mbuf is passed 12799 */ 12800 if (sndlen == 0) { 12801 if (srcv->sinfo_flags & SCTP_EOF) { 12802 got_all_of_the_send = 1; 12803 goto dataless_eof; 12804 } else { 12805 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12806 error = EINVAL; 12807 goto out; 12808 } 12809 } 12810 if (top == NULL) { 12811 struct sctp_stream_queue_pending *sp; 12812 struct sctp_stream_out *strm; 12813 uint32_t sndout; 12814 12815 SCTP_TCB_SEND_LOCK(stcb); 12816 if ((asoc->stream_locked) && 12817 (asoc->stream_locked_on != srcv->sinfo_stream)) { 12818 SCTP_TCB_SEND_UNLOCK(stcb); 12819 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12820 error = EINVAL; 12821 goto out; 12822 } 12823 SCTP_TCB_SEND_UNLOCK(stcb); 12824 12825 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 12826 if (strm->last_msg_incomplete == 0) { 12827 do_a_copy_in: 12828 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error); 12829 if ((sp == NULL) || (error)) { 12830 goto out; 12831 } 12832 SCTP_TCB_SEND_LOCK(stcb); 12833 if (sp->msg_is_complete) { 12834 strm->last_msg_incomplete = 0; 12835 asoc->stream_locked = 0; 12836 } else { 12837 /* 12838 * Just got locked to this guy in case of an 12839 * interrupt. 12840 */ 12841 strm->last_msg_incomplete = 1; 12842 asoc->stream_locked = 1; 12843 asoc->stream_locked_on = srcv->sinfo_stream; 12844 sp->sender_all_done = 0; 12845 } 12846 sctp_snd_sb_alloc(stcb, sp->length); 12847 atomic_add_int(&asoc->stream_queue_cnt, 1); 12848 if (srcv->sinfo_flags & SCTP_UNORDERED) { 12849 SCTP_STAT_INCR(sctps_sends_with_unord); 12850 } 12851 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 12852 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1); 12853 SCTP_TCB_SEND_UNLOCK(stcb); 12854 } else { 12855 SCTP_TCB_SEND_LOCK(stcb); 12856 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead); 12857 SCTP_TCB_SEND_UNLOCK(stcb); 12858 if (sp == NULL) { 12859 /* ???? Huh ??? last msg is gone */ 12860#ifdef INVARIANTS 12861 panic("Warning: Last msg marked incomplete, yet nothing left?"); 12862#else 12863 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n"); 12864 strm->last_msg_incomplete = 0; 12865#endif 12866 goto do_a_copy_in; 12867 12868 } 12869 } 12870 while (uio->uio_resid > 0) { 12871 /* How much room do we have? */ 12872 struct mbuf *new_tail, *mm; 12873 12874 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 12875 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size; 12876 else 12877 max_len = 0; 12878 12879 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) || 12880 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) || 12881 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) { 12882 sndout = 0; 12883 new_tail = NULL; 12884 if (hold_tcblock) { 12885 SCTP_TCB_UNLOCK(stcb); 12886 hold_tcblock = 0; 12887 } 12888 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail); 12889 if ((mm == NULL) || error) { 12890 if (mm) { 12891 sctp_m_freem(mm); 12892 } 12893 goto out; 12894 } 12895 /* Update the mbuf and count */ 12896 SCTP_TCB_SEND_LOCK(stcb); 12897 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12898 /* 12899 * we need to get out. Peer probably 12900 * aborted. 12901 */ 12902 sctp_m_freem(mm); 12903 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) { 12904 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12905 error = ECONNRESET; 12906 } 12907 SCTP_TCB_SEND_UNLOCK(stcb); 12908 goto out; 12909 } 12910 if (sp->tail_mbuf) { 12911 /* tack it to the end */ 12912 SCTP_BUF_NEXT(sp->tail_mbuf) = mm; 12913 sp->tail_mbuf = new_tail; 12914 } else { 12915 /* A stolen mbuf */ 12916 sp->data = mm; 12917 sp->tail_mbuf = new_tail; 12918 } 12919 sctp_snd_sb_alloc(stcb, sndout); 12920 atomic_add_int(&sp->length, sndout); 12921 len += sndout; 12922 12923 /* Did we reach EOR? */ 12924 if ((uio->uio_resid == 0) && 12925 ((user_marks_eor == 0) || 12926 (srcv->sinfo_flags & SCTP_EOF) || 12927 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { 12928 sp->msg_is_complete = 1; 12929 } else { 12930 sp->msg_is_complete = 0; 12931 } 12932 SCTP_TCB_SEND_UNLOCK(stcb); 12933 } 12934 if (uio->uio_resid == 0) { 12935 /* got it all? */ 12936 continue; 12937 } 12938 /* PR-SCTP? */ 12939 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) { 12940 /* 12941 * This is ugly but we must assure locking 12942 * order 12943 */ 12944 if (hold_tcblock == 0) { 12945 SCTP_TCB_LOCK(stcb); 12946 hold_tcblock = 1; 12947 } 12948 sctp_prune_prsctp(stcb, asoc, srcv, sndlen); 12949 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12950 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 12951 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 12952 else 12953 max_len = 0; 12954 if (max_len > 0) { 12955 continue; 12956 } 12957 SCTP_TCB_UNLOCK(stcb); 12958 hold_tcblock = 0; 12959 } 12960 /* wait for space now */ 12961 if (non_blocking) { 12962 /* Non-blocking io in place out */ 12963 goto skip_out_eof; 12964 } 12965 /* What about the INIT, send it maybe */ 12966 if (queue_only_for_init) { 12967 if (hold_tcblock == 0) { 12968 SCTP_TCB_LOCK(stcb); 12969 hold_tcblock = 1; 12970 } 12971 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 12972 /* a collision took us forward? */ 12973 queue_only = 0; 12974 } else { 12975 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 12976 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); 12977 queue_only = 1; 12978 } 12979 } 12980 if ((net->flight_size > net->cwnd) && 12981 (asoc->sctp_cmt_on_off == 0)) { 12982 SCTP_STAT_INCR(sctps_send_cwnd_avoid); 12983 queue_only = 1; 12984 } else if (asoc->ifp_had_enobuf) { 12985 SCTP_STAT_INCR(sctps_ifnomemqueued); 12986 if (net->flight_size > (2 * net->mtu)) { 12987 queue_only = 1; 12988 } 12989 asoc->ifp_had_enobuf = 0; 12990 } 12991 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 12992 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 12993 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 12994 (stcb->asoc.total_flight > 0) && 12995 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && 12996 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 12997 12998 /*- 12999 * Ok, Nagle is set on and we have data outstanding. 13000 * Don't send anything and let SACKs drive out the 13001 * data unless wen have a "full" segment to send. 13002 */ 13003 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13004 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 13005 } 13006 SCTP_STAT_INCR(sctps_naglequeued); 13007 nagle_applies = 1; 13008 } else { 13009 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13010 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 13011 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 13012 } 13013 SCTP_STAT_INCR(sctps_naglesent); 13014 nagle_applies = 0; 13015 } 13016 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13017 13018 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, 13019 nagle_applies, un_sent); 13020 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, 13021 stcb->asoc.total_flight, 13022 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); 13023 } 13024 if (queue_only_for_init) 13025 queue_only_for_init = 0; 13026 if ((queue_only == 0) && (nagle_applies == 0)) { 13027 /*- 13028 * need to start chunk output 13029 * before blocking.. note that if 13030 * a lock is already applied, then 13031 * the input via the net is happening 13032 * and I don't need to start output :-D 13033 */ 13034 if (hold_tcblock == 0) { 13035 if (SCTP_TCB_TRYLOCK(stcb)) { 13036 hold_tcblock = 1; 13037 sctp_chunk_output(inp, 13038 stcb, 13039 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13040 } 13041 } else { 13042 sctp_chunk_output(inp, 13043 stcb, 13044 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13045 } 13046 if (hold_tcblock == 1) { 13047 SCTP_TCB_UNLOCK(stcb); 13048 hold_tcblock = 0; 13049 } 13050 } 13051 SOCKBUF_LOCK(&so->so_snd); 13052 /*- 13053 * This is a bit strange, but I think it will 13054 * work. The total_output_queue_size is locked and 13055 * protected by the TCB_LOCK, which we just released. 13056 * There is a race that can occur between releasing it 13057 * above, and me getting the socket lock, where sacks 13058 * come in but we have not put the SB_WAIT on the 13059 * so_snd buffer to get the wakeup. After the LOCK 13060 * is applied the sack_processing will also need to 13061 * LOCK the so->so_snd to do the actual sowwakeup(). So 13062 * once we have the socket buffer lock if we recheck the 13063 * size we KNOW we will get to sleep safely with the 13064 * wakeup flag in place. 13065 */ 13066 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size + 13067 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) { 13068 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13069 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK, 13070 asoc, uio->uio_resid); 13071 } 13072 be.error = 0; 13073 stcb->block_entry = &be; 13074 error = sbwait(&so->so_snd); 13075 stcb->block_entry = NULL; 13076 13077 if (error || so->so_error || be.error) { 13078 if (error == 0) { 13079 if (so->so_error) 13080 error = so->so_error; 13081 if (be.error) { 13082 error = be.error; 13083 } 13084 } 13085 SOCKBUF_UNLOCK(&so->so_snd); 13086 goto out_unlocked; 13087 } 13088 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13089 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 13090 asoc, stcb->asoc.total_output_queue_size); 13091 } 13092 } 13093 SOCKBUF_UNLOCK(&so->so_snd); 13094 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 13095 goto out_unlocked; 13096 } 13097 } 13098 SCTP_TCB_SEND_LOCK(stcb); 13099 if (sp) { 13100 if (sp->msg_is_complete == 0) { 13101 strm->last_msg_incomplete = 1; 13102 asoc->stream_locked = 1; 13103 asoc->stream_locked_on = srcv->sinfo_stream; 13104 } else { 13105 sp->sender_all_done = 1; 13106 strm->last_msg_incomplete = 0; 13107 asoc->stream_locked = 0; 13108 } 13109 } else { 13110 SCTP_PRINTF("Huh no sp TSNH?\n"); 13111 strm->last_msg_incomplete = 0; 13112 asoc->stream_locked = 0; 13113 } 13114 SCTP_TCB_SEND_UNLOCK(stcb); 13115 if (uio->uio_resid == 0) { 13116 got_all_of_the_send = 1; 13117 } 13118 } else { 13119 /* We send in a 0, since we do NOT have any locks */ 13120 error = sctp_msg_append(stcb, net, top, srcv, 0); 13121 top = NULL; 13122 if (srcv->sinfo_flags & SCTP_EOF) { 13123 /* 13124 * This should only happen for Panda for the mbuf 13125 * send case, which does NOT yet support EEOR mode. 13126 * Thus, we can just set this flag to do the proper 13127 * EOF handling. 13128 */ 13129 got_all_of_the_send = 1; 13130 } 13131 } 13132 if (error) { 13133 goto out; 13134 } 13135dataless_eof: 13136 /* EOF thing ? */ 13137 if ((srcv->sinfo_flags & SCTP_EOF) && 13138 (got_all_of_the_send == 1)) { 13139 int cnt; 13140 13141 SCTP_STAT_INCR(sctps_sends_with_eof); 13142 error = 0; 13143 if (hold_tcblock == 0) { 13144 SCTP_TCB_LOCK(stcb); 13145 hold_tcblock = 1; 13146 } 13147 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED); 13148 if (TAILQ_EMPTY(&asoc->send_queue) && 13149 TAILQ_EMPTY(&asoc->sent_queue) && 13150 (cnt == 0)) { 13151 if (asoc->locked_on_sending) { 13152 goto abort_anyway; 13153 } 13154 /* there is nothing queued to send, so I'm done... */ 13155 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 13156 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 13157 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 13158 struct sctp_nets *netp; 13159 13160 /* only send SHUTDOWN the first time through */ 13161 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 13162 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 13163 } 13164 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 13165 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 13166 sctp_stop_timers_for_shutdown(stcb); 13167 if (stcb->asoc.alternate) { 13168 netp = stcb->asoc.alternate; 13169 } else { 13170 netp = stcb->asoc.primary_destination; 13171 } 13172 sctp_send_shutdown(stcb, netp); 13173 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 13174 netp); 13175 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 13176 asoc->primary_destination); 13177 } 13178 } else { 13179 /*- 13180 * we still got (or just got) data to send, so set 13181 * SHUTDOWN_PENDING 13182 */ 13183 /*- 13184 * XXX sockets draft says that SCTP_EOF should be 13185 * sent with no data. currently, we will allow user 13186 * data to be sent first and move to 13187 * SHUTDOWN-PENDING 13188 */ 13189 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 13190 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 13191 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 13192 if (hold_tcblock == 0) { 13193 SCTP_TCB_LOCK(stcb); 13194 hold_tcblock = 1; 13195 } 13196 if (asoc->locked_on_sending) { 13197 /* Locked to send out the data */ 13198 struct sctp_stream_queue_pending *sp; 13199 13200 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 13201 if (sp) { 13202 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 13203 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 13204 } 13205 } 13206 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 13207 if (TAILQ_EMPTY(&asoc->send_queue) && 13208 TAILQ_EMPTY(&asoc->sent_queue) && 13209 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 13210 abort_anyway: 13211 if (free_cnt_applied) { 13212 atomic_add_int(&stcb->asoc.refcnt, -1); 13213 free_cnt_applied = 0; 13214 } 13215 sctp_abort_an_association(stcb->sctp_ep, stcb, 13216 NULL, SCTP_SO_LOCKED); 13217 /* 13218 * now relock the stcb so everything 13219 * is sane 13220 */ 13221 hold_tcblock = 0; 13222 stcb = NULL; 13223 goto out; 13224 } 13225 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 13226 asoc->primary_destination); 13227 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY); 13228 } 13229 } 13230 } 13231skip_out_eof: 13232 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { 13233 some_on_control = 1; 13234 } 13235 if (queue_only_for_init) { 13236 if (hold_tcblock == 0) { 13237 SCTP_TCB_LOCK(stcb); 13238 hold_tcblock = 1; 13239 } 13240 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 13241 /* a collision took us forward? */ 13242 queue_only = 0; 13243 } else { 13244 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 13245 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT); 13246 queue_only = 1; 13247 } 13248 } 13249 if ((net->flight_size > net->cwnd) && 13250 (stcb->asoc.sctp_cmt_on_off == 0)) { 13251 SCTP_STAT_INCR(sctps_send_cwnd_avoid); 13252 queue_only = 1; 13253 } else if (asoc->ifp_had_enobuf) { 13254 SCTP_STAT_INCR(sctps_ifnomemqueued); 13255 if (net->flight_size > (2 * net->mtu)) { 13256 queue_only = 1; 13257 } 13258 asoc->ifp_had_enobuf = 0; 13259 } 13260 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 13261 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 13262 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 13263 (stcb->asoc.total_flight > 0) && 13264 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && 13265 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 13266 /*- 13267 * Ok, Nagle is set on and we have data outstanding. 13268 * Don't send anything and let SACKs drive out the 13269 * data unless wen have a "full" segment to send. 13270 */ 13271 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13272 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 13273 } 13274 SCTP_STAT_INCR(sctps_naglequeued); 13275 nagle_applies = 1; 13276 } else { 13277 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13278 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 13279 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 13280 } 13281 SCTP_STAT_INCR(sctps_naglesent); 13282 nagle_applies = 0; 13283 } 13284 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13285 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, 13286 nagle_applies, un_sent); 13287 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, 13288 stcb->asoc.total_flight, 13289 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); 13290 } 13291 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) { 13292 /* we can attempt to send too. */ 13293 if (hold_tcblock == 0) { 13294 /* 13295 * If there is activity recv'ing sacks no need to 13296 * send 13297 */ 13298 if (SCTP_TCB_TRYLOCK(stcb)) { 13299 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13300 hold_tcblock = 1; 13301 } 13302 } else { 13303 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13304 } 13305 } else if ((queue_only == 0) && 13306 (stcb->asoc.peers_rwnd == 0) && 13307 (stcb->asoc.total_flight == 0)) { 13308 /* We get to have a probe outstanding */ 13309 if (hold_tcblock == 0) { 13310 hold_tcblock = 1; 13311 SCTP_TCB_LOCK(stcb); 13312 } 13313 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13314 } else if (some_on_control) { 13315 int num_out, reason, frag_point; 13316 13317 /* Here we do control only */ 13318 if (hold_tcblock == 0) { 13319 hold_tcblock = 1; 13320 SCTP_TCB_LOCK(stcb); 13321 } 13322 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 13323 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 13324 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED); 13325 } 13326 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n", 13327 queue_only, stcb->asoc.peers_rwnd, un_sent, 13328 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue, 13329 stcb->asoc.total_output_queue_size, error); 13330 13331out: 13332out_unlocked: 13333 13334 if (local_soresv && stcb) { 13335 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen); 13336 } 13337 if (create_lock_applied) { 13338 SCTP_ASOC_CREATE_UNLOCK(inp); 13339 } 13340 if ((stcb) && hold_tcblock) { 13341 SCTP_TCB_UNLOCK(stcb); 13342 } 13343 if (stcb && free_cnt_applied) { 13344 atomic_add_int(&stcb->asoc.refcnt, -1); 13345 } 13346#ifdef INVARIANTS 13347 if (stcb) { 13348 if (mtx_owned(&stcb->tcb_mtx)) { 13349 panic("Leaving with tcb mtx owned?"); 13350 } 13351 if (mtx_owned(&stcb->tcb_send_mtx)) { 13352 panic("Leaving with tcb send mtx owned?"); 13353 } 13354 } 13355#endif 13356#ifdef INVARIANTS 13357 if (inp) { 13358 sctp_validate_no_locks(inp); 13359 } else { 13360 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n"); 13361 } 13362#endif 13363 if (top) { 13364 sctp_m_freem(top); 13365 } 13366 if (control) { 13367 sctp_m_freem(control); 13368 } 13369 return (error); 13370} 13371 13372 13373/* 13374 * generate an AUTHentication chunk, if required 13375 */ 13376struct mbuf * 13377sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end, 13378 struct sctp_auth_chunk **auth_ret, uint32_t * offset, 13379 struct sctp_tcb *stcb, uint8_t chunk) 13380{ 13381 struct mbuf *m_auth; 13382 struct sctp_auth_chunk *auth; 13383 int chunk_len; 13384 struct mbuf *cn; 13385 13386 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) || 13387 (stcb == NULL)) 13388 return (m); 13389 13390 if (stcb->asoc.auth_supported == 0) { 13391 return (m); 13392 } 13393 /* does the requested chunk require auth? */ 13394 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) { 13395 return (m); 13396 } 13397 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER); 13398 if (m_auth == NULL) { 13399 /* no mbuf's */ 13400 return (m); 13401 } 13402 /* reserve some space if this will be the first mbuf */ 13403 if (m == NULL) 13404 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD); 13405 /* fill in the AUTH chunk details */ 13406 auth = mtod(m_auth, struct sctp_auth_chunk *); 13407 bzero(auth, sizeof(*auth)); 13408 auth->ch.chunk_type = SCTP_AUTHENTICATION; 13409 auth->ch.chunk_flags = 0; 13410 chunk_len = sizeof(*auth) + 13411 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id); 13412 auth->ch.chunk_length = htons(chunk_len); 13413 auth->hmac_id = htons(stcb->asoc.peer_hmac_id); 13414 /* key id and hmac digest will be computed and filled in upon send */ 13415 13416 /* save the offset where the auth was inserted into the chain */ 13417 *offset = 0; 13418 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) { 13419 *offset += SCTP_BUF_LEN(cn); 13420 } 13421 13422 /* update length and return pointer to the auth chunk */ 13423 SCTP_BUF_LEN(m_auth) = chunk_len; 13424 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0); 13425 if (auth_ret != NULL) 13426 *auth_ret = auth; 13427 13428 return (m); 13429} 13430 13431#ifdef INET6 13432int 13433sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro) 13434{ 13435 struct nd_prefix *pfx = NULL; 13436 struct nd_pfxrouter *pfxrtr = NULL; 13437 struct sockaddr_in6 gw6; 13438 13439 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6) 13440 return (0); 13441 13442 /* get prefix entry of address */ 13443 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) { 13444 if (pfx->ndpr_stateflags & NDPRF_DETACHED) 13445 continue; 13446 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr, 13447 &src6->sin6_addr, &pfx->ndpr_mask)) 13448 break; 13449 } 13450 /* no prefix entry in the prefix list */ 13451 if (pfx == NULL) { 13452 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for "); 13453 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); 13454 return (0); 13455 } 13456 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is "); 13457 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); 13458 13459 /* search installed gateway from prefix entry */ 13460 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) { 13461 memset(&gw6, 0, sizeof(struct sockaddr_in6)); 13462 gw6.sin6_family = AF_INET6; 13463 gw6.sin6_len = sizeof(struct sockaddr_in6); 13464 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr, 13465 sizeof(struct in6_addr)); 13466 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is "); 13467 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6); 13468 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is "); 13469 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); 13470 if (sctp_cmpaddr((struct sockaddr *)&gw6, 13471 ro->ro_rt->rt_gateway)) { 13472 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n"); 13473 return (1); 13474 } 13475 } 13476 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n"); 13477 return (0); 13478} 13479 13480#endif 13481 13482int 13483sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro) 13484{ 13485#ifdef INET 13486 struct sockaddr_in *sin, *mask; 13487 struct ifaddr *ifa; 13488 struct in_addr srcnetaddr, gwnetaddr; 13489 13490 if (ro == NULL || ro->ro_rt == NULL || 13491 sifa->address.sa.sa_family != AF_INET) { 13492 return (0); 13493 } 13494 ifa = (struct ifaddr *)sifa->ifa; 13495 mask = (struct sockaddr_in *)(ifa->ifa_netmask); 13496 sin = &sifa->address.sin; 13497 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); 13498 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is "); 13499 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa); 13500 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr); 13501 13502 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway; 13503 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); 13504 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is "); 13505 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); 13506 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr); 13507 if (srcnetaddr.s_addr == gwnetaddr.s_addr) { 13508 return (1); 13509 } 13510#endif 13511 return (0); 13512} 13513