sctp_pcb.c revision 281955
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_pcb.c 281955 2015-04-24 23:26:44Z hiren $"); 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_pcb.h> 41#include <netinet/sctputil.h> 42#include <netinet/sctp.h> 43#include <netinet/sctp_header.h> 44#include <netinet/sctp_asconf.h> 45#include <netinet/sctp_output.h> 46#include <netinet/sctp_timer.h> 47#include <netinet/sctp_bsd_addr.h> 48#include <netinet/sctp_dtrace_define.h> 49#if defined(INET) || defined(INET6) 50#include <netinet/udp.h> 51#endif 52#ifdef INET6 53#include <netinet6/ip6_var.h> 54#endif 55#include <sys/sched.h> 56#include <sys/smp.h> 57#include <sys/unistd.h> 58 59 60VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62/* FIX: we don't handle multiple link local scopes */ 63/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64#ifdef INET6 65int 66SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67{ 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return (0); 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79} 80 81#endif 82 83void 84sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85{ 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100} 101 102/*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147struct sctp_vrf * 148sctp_allocate_vrf(int vrf_id) 149{ 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163#ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165#endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181#ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183#endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192} 193 194 195struct sctp_ifn * 196sctp_find_ifn(void *ifn, uint32_t ifn_index) 197{ 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215} 216 217 218struct sctp_vrf * 219sctp_find_vrf(uint32_t vrf_id) 220{ 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231} 232 233 234void 235sctp_free_vrf(struct sctp_vrf *vrf) 236{ 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247} 248 249 250void 251sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252{ 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261} 262 263 264void 265sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266{ 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273} 274 275 276void 277sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278{ 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287} 288 289 290static void 291sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292{ 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310} 311 312 313void 314sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316{ 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354} 355 356 357void 358sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360{ 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398} 399 400 401/*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406static void 407sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408{ 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418#ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422#endif 423#ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427#endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 434 sctp_ifnp->registered_af = ifa_af; 435 } 436} 437 438 439/*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445static void 446sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447{ 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453#ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457#endif 458#ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462#endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488} 489 490 491struct sctp_ifa * 492sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496{ 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505#ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508#endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532#ifdef INVARIANTS 533 panic("No memory for IFN"); 534#endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608#ifdef INVARIANTS 609 panic("No memory for IFA"); 610#endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623#ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = &sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641#endif 642#ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = &sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661#endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 bzero(wi, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 SCTP_WQ_ADDR_UNLOCK(); 714 715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 716 (struct sctp_inpcb *)NULL, 717 (struct sctp_tcb *)NULL, 718 (struct sctp_nets *)NULL); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724} 725 726void 727sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729{ 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739#ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742#endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789#ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795#endif 796 797out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 bzero(wi, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 SCTP_WQ_ADDR_UNLOCK(); 826 827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 828 (struct sctp_inpcb *)NULL, 829 (struct sctp_tcb *)NULL, 830 (struct sctp_nets *)NULL); 831 } 832 return; 833} 834 835 836static int 837sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838{ 839 int loopback_scope; 840 841#if defined(INET) 842 int ipv4_local_scope, ipv4_addr_legal; 843 844#endif 845#if defined(INET6) 846 int local_scope, site_scope, ipv6_addr_legal; 847 848#endif 849 struct sctp_vrf *vrf; 850 struct sctp_ifn *sctp_ifn; 851 struct sctp_ifa *sctp_ifa; 852 853 loopback_scope = stcb->asoc.scope.loopback_scope; 854#if defined(INET) 855 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 856 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 857#endif 858#if defined(INET6) 859 local_scope = stcb->asoc.scope.local_scope; 860 site_scope = stcb->asoc.scope.site_scope; 861 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 862#endif 863 864 SCTP_IPI_ADDR_RLOCK(); 865 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 866 if (vrf == NULL) { 867 /* no vrf, no addresses */ 868 SCTP_IPI_ADDR_RUNLOCK(); 869 return (0); 870 } 871 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 872 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 873 if ((loopback_scope == 0) && 874 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 875 continue; 876 } 877 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 878 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 879 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 880 /* 881 * We allow pending addresses, where 882 * we have sent an asconf-add to be 883 * considered valid. 884 */ 885 continue; 886 } 887 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 888 continue; 889 } 890 switch (sctp_ifa->address.sa.sa_family) { 891#ifdef INET 892 case AF_INET: 893 if (ipv4_addr_legal) { 894 struct sockaddr_in *sin, 895 *rsin; 896 897 sin = &sctp_ifa->address.sin; 898 rsin = (struct sockaddr_in *)to; 899 if ((ipv4_local_scope == 0) && 900 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 901 continue; 902 } 903 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 904 &sin->sin_addr) != 0) { 905 continue; 906 } 907 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 908 SCTP_IPI_ADDR_RUNLOCK(); 909 return (1); 910 } 911 } 912 break; 913#endif 914#ifdef INET6 915 case AF_INET6: 916 if (ipv6_addr_legal) { 917 struct sockaddr_in6 *sin6, 918 *rsin6; 919 920 sin6 = &sctp_ifa->address.sin6; 921 rsin6 = (struct sockaddr_in6 *)to; 922 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 923 &sin6->sin6_addr) != 0) { 924 continue; 925 } 926 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 927 if (local_scope == 0) 928 continue; 929 if (sin6->sin6_scope_id == 0) { 930 if (sa6_recoverscope(sin6) != 0) 931 continue; 932 } 933 } 934 if ((site_scope == 0) && 935 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 936 continue; 937 } 938 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 939 SCTP_IPI_ADDR_RUNLOCK(); 940 return (1); 941 } 942 } 943 break; 944#endif 945 default: 946 /* TSNH */ 947 break; 948 } 949 } 950 } 951 } else { 952 struct sctp_laddr *laddr; 953 954 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 955 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 956 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 957 continue; 958 } 959 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 960 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 961 /* 962 * We allow pending addresses, where we have 963 * sent an asconf-add to be considered 964 * valid. 965 */ 966 continue; 967 } 968 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 969 continue; 970 } 971 switch (to->sa_family) { 972#ifdef INET 973 case AF_INET: 974 { 975 struct sockaddr_in *sin, *rsin; 976 977 sin = &laddr->ifa->address.sin; 978 rsin = (struct sockaddr_in *)to; 979 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 980 SCTP_IPI_ADDR_RUNLOCK(); 981 return (1); 982 } 983 break; 984 } 985#endif 986#ifdef INET6 987 case AF_INET6: 988 { 989 struct sockaddr_in6 *sin6, *rsin6; 990 991 sin6 = &laddr->ifa->address.sin6; 992 rsin6 = (struct sockaddr_in6 *)to; 993 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (1); 996 } 997 break; 998 } 999 1000#endif 1001 default: 1002 /* TSNH */ 1003 break; 1004 } 1005 1006 } 1007 } 1008 SCTP_IPI_ADDR_RUNLOCK(); 1009 return (0); 1010} 1011 1012 1013static struct sctp_tcb * 1014sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1015 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1016{ 1017 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1018 /* 1019 * If we support the TCP model, then we must now dig through to see 1020 * if we can find our endpoint in the list of tcp ep's. 1021 */ 1022 uint16_t lport, rport; 1023 struct sctppcbhead *ephead; 1024 struct sctp_inpcb *inp; 1025 struct sctp_laddr *laddr; 1026 struct sctp_tcb *stcb; 1027 struct sctp_nets *net; 1028 1029 if ((to == NULL) || (from == NULL)) { 1030 return (NULL); 1031 } 1032 switch (to->sa_family) { 1033#ifdef INET 1034 case AF_INET: 1035 if (from->sa_family == AF_INET) { 1036 lport = ((struct sockaddr_in *)to)->sin_port; 1037 rport = ((struct sockaddr_in *)from)->sin_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042#endif 1043#ifdef INET6 1044 case AF_INET6: 1045 if (from->sa_family == AF_INET6) { 1046 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1047 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1048 } else { 1049 return (NULL); 1050 } 1051 break; 1052#endif 1053 default: 1054 return (NULL); 1055 } 1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1057 /* 1058 * Ok now for each of the guys in this bucket we must look and see: 1059 * - Does the remote port match. - Does there single association's 1060 * addresses match this address (to). If so we update p_ep to point 1061 * to this ep and return the tcb from it. 1062 */ 1063 LIST_FOREACH(inp, ephead, sctp_hash) { 1064 SCTP_INP_RLOCK(inp); 1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 if (lport != inp->sctp_lport) { 1070 SCTP_INP_RUNLOCK(inp); 1071 continue; 1072 } 1073 switch (to->sa_family) { 1074#ifdef INET 1075 case AF_INET: 1076 { 1077 struct sockaddr_in *sin; 1078 1079 sin = (struct sockaddr_in *)to; 1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1081 &sin->sin_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087#endif 1088#ifdef INET6 1089 case AF_INET6: 1090 { 1091 struct sockaddr_in6 *sin6; 1092 1093 sin6 = (struct sockaddr_in6 *)to; 1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1095 &sin6->sin6_addr) != 0) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 break; 1100 } 1101#endif 1102 default: 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 if (inp->def_vrf_id != vrf_id) { 1107 SCTP_INP_RUNLOCK(inp); 1108 continue; 1109 } 1110 /* check to see if the ep has one of the addresses */ 1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1112 /* We are NOT bound all, so look further */ 1113 int match = 0; 1114 1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1116 1117 if (laddr->ifa == NULL) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 1119 continue; 1120 } 1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1123 continue; 1124 } 1125 if (laddr->ifa->address.sa.sa_family == 1126 to->sa_family) { 1127 /* see if it matches */ 1128#ifdef INET 1129 if (from->sa_family == AF_INET) { 1130 struct sockaddr_in *intf_addr, 1131 *sin; 1132 1133 intf_addr = &laddr->ifa->address.sin; 1134 sin = (struct sockaddr_in *)to; 1135 if (sin->sin_addr.s_addr == 1136 intf_addr->sin_addr.s_addr) { 1137 match = 1; 1138 break; 1139 } 1140 } 1141#endif 1142#ifdef INET6 1143 if (from->sa_family == AF_INET6) { 1144 struct sockaddr_in6 *intf_addr6; 1145 struct sockaddr_in6 *sin6; 1146 1147 sin6 = (struct sockaddr_in6 *) 1148 to; 1149 intf_addr6 = &laddr->ifa->address.sin6; 1150 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1152 intf_addr6)) { 1153 match = 1; 1154 break; 1155 } 1156 } 1157#endif 1158 } 1159 } 1160 if (match == 0) { 1161 /* This endpoint does not have this address */ 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 } 1166 /* 1167 * Ok if we hit here the ep has the address, does it hold 1168 * the tcb? 1169 */ 1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1171 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1172 if (stcb == NULL) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 SCTP_TCB_LOCK(stcb); 1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->rport != rport) { 1183 /* remote port does not match. */ 1184 SCTP_TCB_UNLOCK(stcb); 1185 SCTP_INP_RUNLOCK(inp); 1186 continue; 1187 } 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 continue; 1197 } 1198 /* Does this TCB have a matching address? */ 1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200 1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1202 /* not the same family, can't be a match */ 1203 continue; 1204 } 1205 switch (from->sa_family) { 1206#ifdef INET 1207 case AF_INET: 1208 { 1209 struct sockaddr_in *sin, *rsin; 1210 1211 sin = (struct sockaddr_in *)&net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)from; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 /* 1220 * Update the endpoint 1221 * pointer 1222 */ 1223 *inp_p = inp; 1224 SCTP_INP_RUNLOCK(inp); 1225 return (stcb); 1226 } 1227 break; 1228 } 1229#endif 1230#ifdef INET6 1231 case AF_INET6: 1232 { 1233 struct sockaddr_in6 *sin6, *rsin6; 1234 1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1236 rsin6 = (struct sockaddr_in6 *)from; 1237 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1238 rsin6)) { 1239 /* found it */ 1240 if (netp != NULL) { 1241 *netp = net; 1242 } 1243 /* 1244 * Update the endpoint 1245 * pointer 1246 */ 1247 *inp_p = inp; 1248 SCTP_INP_RUNLOCK(inp); 1249 return (stcb); 1250 } 1251 break; 1252 } 1253#endif 1254 default: 1255 /* TSNH */ 1256 break; 1257 } 1258 } 1259 SCTP_TCB_UNLOCK(stcb); 1260 SCTP_INP_RUNLOCK(inp); 1261 } 1262 return (NULL); 1263} 1264 1265 1266/* 1267 * rules for use 1268 * 1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1272 * NULL. 1273 */ 1274 1275struct sctp_tcb * 1276sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1278{ 1279 struct sctpasochead *head; 1280 struct sctp_inpcb *inp; 1281 struct sctp_tcb *stcb = NULL; 1282 struct sctp_nets *net; 1283 uint16_t rport; 1284 1285 inp = *inp_p; 1286 switch (remote->sa_family) { 1287#ifdef INET 1288 case AF_INET: 1289 rport = (((struct sockaddr_in *)remote)->sin_port); 1290 break; 1291#endif 1292#ifdef INET6 1293 case AF_INET6: 1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1295 break; 1296#endif 1297 default: 1298 return (NULL); 1299 } 1300 if (locked_tcb) { 1301 /* 1302 * UN-lock so we can do proper locking here this occurs when 1303 * called from load_addresses_from_init. 1304 */ 1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1306 SCTP_TCB_UNLOCK(locked_tcb); 1307 } 1308 SCTP_INP_INFO_RLOCK(); 1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1311 /*- 1312 * Now either this guy is our listener or it's the 1313 * connector. If it is the one that issued the connect, then 1314 * it's only chance is to be the first TCB in the list. If 1315 * it is the acceptor, then do the special_lookup to hash 1316 * and find the real inp. 1317 */ 1318 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1319 /* to is peer addr, from is my addr */ 1320 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1321 netp, inp->def_vrf_id); 1322 if ((stcb != NULL) && (locked_tcb == NULL)) { 1323 /* we have a locked tcb, lower refcount */ 1324 SCTP_INP_DECR_REF(inp); 1325 } 1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1328 SCTP_TCB_LOCK(locked_tcb); 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1331 } 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } else { 1335 SCTP_INP_WLOCK(inp); 1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1337 goto null_return; 1338 } 1339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1340 if (stcb == NULL) { 1341 goto null_return; 1342 } 1343 SCTP_TCB_LOCK(stcb); 1344 1345 if (stcb->rport != rport) { 1346 /* remote port does not match. */ 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1355 SCTP_TCB_UNLOCK(stcb); 1356 goto null_return; 1357 } 1358 /* now look at the list of remote addresses */ 1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1360#ifdef INVARIANTS 1361 if (net == (TAILQ_NEXT(net, sctp_next))) { 1362 panic("Corrupt net list"); 1363 } 1364#endif 1365 if (net->ro._l_addr.sa.sa_family != 1366 remote->sa_family) { 1367 /* not the same family */ 1368 continue; 1369 } 1370 switch (remote->sa_family) { 1371#ifdef INET 1372 case AF_INET: 1373 { 1374 struct sockaddr_in *sin, 1375 *rsin; 1376 1377 sin = (struct sockaddr_in *) 1378 &net->ro._l_addr; 1379 rsin = (struct sockaddr_in *)remote; 1380 if (sin->sin_addr.s_addr == 1381 rsin->sin_addr.s_addr) { 1382 /* found it */ 1383 if (netp != NULL) { 1384 *netp = net; 1385 } 1386 if (locked_tcb == NULL) { 1387 SCTP_INP_DECR_REF(inp); 1388 } else if (locked_tcb != stcb) { 1389 SCTP_TCB_LOCK(locked_tcb); 1390 } 1391 if (locked_tcb) { 1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1393 } 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400#endif 1401#ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429#endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 if (head == NULL) { 1445 goto null_return; 1446 } 1447 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1448 if (stcb->rport != rport) { 1449 /* remote port does not match */ 1450 continue; 1451 } 1452 SCTP_TCB_LOCK(stcb); 1453 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1454 SCTP_TCB_UNLOCK(stcb); 1455 continue; 1456 } 1457 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1458 SCTP_TCB_UNLOCK(stcb); 1459 continue; 1460 } 1461 /* now look at the list of remote addresses */ 1462 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1463#ifdef INVARIANTS 1464 if (net == (TAILQ_NEXT(net, sctp_next))) { 1465 panic("Corrupt net list"); 1466 } 1467#endif 1468 if (net->ro._l_addr.sa.sa_family != 1469 remote->sa_family) { 1470 /* not the same family */ 1471 continue; 1472 } 1473 switch (remote->sa_family) { 1474#ifdef INET 1475 case AF_INET: 1476 { 1477 struct sockaddr_in *sin, 1478 *rsin; 1479 1480 sin = (struct sockaddr_in *) 1481 &net->ro._l_addr; 1482 rsin = (struct sockaddr_in *)remote; 1483 if (sin->sin_addr.s_addr == 1484 rsin->sin_addr.s_addr) { 1485 /* found it */ 1486 if (netp != NULL) { 1487 *netp = net; 1488 } 1489 if (locked_tcb == NULL) { 1490 SCTP_INP_DECR_REF(inp); 1491 } else if (locked_tcb != stcb) { 1492 SCTP_TCB_LOCK(locked_tcb); 1493 } 1494 if (locked_tcb) { 1495 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1496 } 1497 SCTP_INP_WUNLOCK(inp); 1498 SCTP_INP_INFO_RUNLOCK(); 1499 return (stcb); 1500 } 1501 break; 1502 } 1503#endif 1504#ifdef INET6 1505 case AF_INET6: 1506 { 1507 struct sockaddr_in6 *sin6, 1508 *rsin6; 1509 1510 sin6 = (struct sockaddr_in6 *) 1511 &net->ro._l_addr; 1512 rsin6 = (struct sockaddr_in6 *)remote; 1513 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1514 rsin6)) { 1515 /* found it */ 1516 if (netp != NULL) { 1517 *netp = net; 1518 } 1519 if (locked_tcb == NULL) { 1520 SCTP_INP_DECR_REF(inp); 1521 } else if (locked_tcb != stcb) { 1522 SCTP_TCB_LOCK(locked_tcb); 1523 } 1524 if (locked_tcb) { 1525 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1526 } 1527 SCTP_INP_WUNLOCK(inp); 1528 SCTP_INP_INFO_RUNLOCK(); 1529 return (stcb); 1530 } 1531 break; 1532 } 1533#endif 1534 default: 1535 /* TSNH */ 1536 break; 1537 } 1538 } 1539 SCTP_TCB_UNLOCK(stcb); 1540 } 1541 } 1542null_return: 1543 /* clean up for returning null */ 1544 if (locked_tcb) { 1545 SCTP_TCB_LOCK(locked_tcb); 1546 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1547 } 1548 SCTP_INP_WUNLOCK(inp); 1549 SCTP_INP_INFO_RUNLOCK(); 1550 /* not found */ 1551 return (NULL); 1552} 1553 1554 1555/* 1556 * Find an association for a specific endpoint using the association id given 1557 * out in the COMM_UP notification 1558 */ 1559struct sctp_tcb * 1560sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1561{ 1562 /* 1563 * Use my the assoc_id to find a endpoint 1564 */ 1565 struct sctpasochead *head; 1566 struct sctp_tcb *stcb; 1567 uint32_t id; 1568 1569 if (inp == NULL) { 1570 SCTP_PRINTF("TSNH ep_associd\n"); 1571 return (NULL); 1572 } 1573 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1574 SCTP_PRINTF("TSNH ep_associd0\n"); 1575 return (NULL); 1576 } 1577 id = (uint32_t) asoc_id; 1578 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1579 if (head == NULL) { 1580 /* invalid id TSNH */ 1581 SCTP_PRINTF("TSNH ep_associd1\n"); 1582 return (NULL); 1583 } 1584 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1585 if (stcb->asoc.assoc_id == id) { 1586 if (inp != stcb->sctp_ep) { 1587 /* 1588 * some other guy has the same id active (id 1589 * collision ??). 1590 */ 1591 SCTP_PRINTF("TSNH ep_associd2\n"); 1592 continue; 1593 } 1594 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1595 continue; 1596 } 1597 if (want_lock) { 1598 SCTP_TCB_LOCK(stcb); 1599 } 1600 return (stcb); 1601 } 1602 } 1603 return (NULL); 1604} 1605 1606 1607struct sctp_tcb * 1608sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1609{ 1610 struct sctp_tcb *stcb; 1611 1612 SCTP_INP_RLOCK(inp); 1613 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1614 SCTP_INP_RUNLOCK(inp); 1615 return (stcb); 1616} 1617 1618 1619/* 1620 * Endpoint probe expects that the INP_INFO is locked. 1621 */ 1622static struct sctp_inpcb * 1623sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1624 uint16_t lport, uint32_t vrf_id) 1625{ 1626 struct sctp_inpcb *inp; 1627 struct sctp_laddr *laddr; 1628 1629#ifdef INET 1630 struct sockaddr_in *sin; 1631 1632#endif 1633#ifdef INET6 1634 struct sockaddr_in6 *sin6; 1635 struct sockaddr_in6 *intf_addr6; 1636 1637#endif 1638 int fnd; 1639 1640#ifdef INET 1641 sin = NULL; 1642#endif 1643#ifdef INET6 1644 sin6 = NULL; 1645#endif 1646 switch (nam->sa_family) { 1647#ifdef INET 1648 case AF_INET: 1649 sin = (struct sockaddr_in *)nam; 1650 break; 1651#endif 1652#ifdef INET6 1653 case AF_INET6: 1654 sin6 = (struct sockaddr_in6 *)nam; 1655 break; 1656#endif 1657 default: 1658 /* unsupported family */ 1659 return (NULL); 1660 } 1661 1662 if (head == NULL) 1663 return (NULL); 1664 1665 LIST_FOREACH(inp, head, sctp_hash) { 1666 SCTP_INP_RLOCK(inp); 1667 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1668 SCTP_INP_RUNLOCK(inp); 1669 continue; 1670 } 1671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1672 (inp->sctp_lport == lport)) { 1673 /* got it */ 1674 switch (nam->sa_family) { 1675#ifdef INET 1676 case AF_INET: 1677 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1678 SCTP_IPV6_V6ONLY(inp)) { 1679 /* 1680 * IPv4 on a IPv6 socket with ONLY 1681 * IPv6 set 1682 */ 1683 SCTP_INP_RUNLOCK(inp); 1684 continue; 1685 } 1686 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1687 &sin->sin_addr) != 0) { 1688 SCTP_INP_RUNLOCK(inp); 1689 continue; 1690 } 1691 break; 1692#endif 1693#ifdef INET6 1694 case AF_INET6: 1695 /* 1696 * A V6 address and the endpoint is NOT 1697 * bound V6 1698 */ 1699 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1700 SCTP_INP_RUNLOCK(inp); 1701 continue; 1702 } 1703 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1704 &sin6->sin6_addr) != 0) { 1705 SCTP_INP_RUNLOCK(inp); 1706 continue; 1707 } 1708 break; 1709#endif 1710 default: 1711 break; 1712 } 1713 /* does a VRF id match? */ 1714 fnd = 0; 1715 if (inp->def_vrf_id == vrf_id) 1716 fnd = 1; 1717 1718 SCTP_INP_RUNLOCK(inp); 1719 if (!fnd) 1720 continue; 1721 return (inp); 1722 } 1723 SCTP_INP_RUNLOCK(inp); 1724 } 1725 switch (nam->sa_family) { 1726#ifdef INET 1727 case AF_INET: 1728 if (sin->sin_addr.s_addr == INADDR_ANY) { 1729 /* Can't hunt for one that has no address specified */ 1730 return (NULL); 1731 } 1732 break; 1733#endif 1734#ifdef INET6 1735 case AF_INET6: 1736 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1737 /* Can't hunt for one that has no address specified */ 1738 return (NULL); 1739 } 1740 break; 1741#endif 1742 default: 1743 break; 1744 } 1745 /* 1746 * ok, not bound to all so see if we can find a EP bound to this 1747 * address. 1748 */ 1749 LIST_FOREACH(inp, head, sctp_hash) { 1750 SCTP_INP_RLOCK(inp); 1751 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1752 SCTP_INP_RUNLOCK(inp); 1753 continue; 1754 } 1755 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1756 SCTP_INP_RUNLOCK(inp); 1757 continue; 1758 } 1759 /* 1760 * Ok this could be a likely candidate, look at all of its 1761 * addresses 1762 */ 1763 if (inp->sctp_lport != lport) { 1764 SCTP_INP_RUNLOCK(inp); 1765 continue; 1766 } 1767 /* does a VRF id match? */ 1768 fnd = 0; 1769 if (inp->def_vrf_id == vrf_id) 1770 fnd = 1; 1771 1772 if (!fnd) { 1773 SCTP_INP_RUNLOCK(inp); 1774 continue; 1775 } 1776 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1777 if (laddr->ifa == NULL) { 1778 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1779 __FUNCTION__); 1780 continue; 1781 } 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1783 (void *)laddr->ifa); 1784 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1785 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1786 continue; 1787 } 1788 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1789 /* possible, see if it matches */ 1790 switch (nam->sa_family) { 1791#ifdef INET 1792 case AF_INET: 1793 if (sin->sin_addr.s_addr == 1794 laddr->ifa->address.sin.sin_addr.s_addr) { 1795 SCTP_INP_RUNLOCK(inp); 1796 return (inp); 1797 } 1798 break; 1799#endif 1800#ifdef INET6 1801 case AF_INET6: 1802 intf_addr6 = &laddr->ifa->address.sin6; 1803 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1804 intf_addr6)) { 1805 SCTP_INP_RUNLOCK(inp); 1806 return (inp); 1807 } 1808 break; 1809#endif 1810 } 1811 } 1812 } 1813 SCTP_INP_RUNLOCK(inp); 1814 } 1815 return (NULL); 1816} 1817 1818 1819static struct sctp_inpcb * 1820sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1821{ 1822 struct sctppcbhead *head; 1823 struct sctp_inpcb *t_inp; 1824 int fnd; 1825 1826 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1827 SCTP_BASE_INFO(hashmark))]; 1828 LIST_FOREACH(t_inp, head, sctp_hash) { 1829 if (t_inp->sctp_lport != lport) { 1830 continue; 1831 } 1832 /* is it in the VRF in question */ 1833 fnd = 0; 1834 if (t_inp->def_vrf_id == vrf_id) 1835 fnd = 1; 1836 if (!fnd) 1837 continue; 1838 1839 /* This one is in use. */ 1840 /* check the v6/v4 binding issue */ 1841 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1842 SCTP_IPV6_V6ONLY(t_inp)) { 1843 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1844 /* collision in V6 space */ 1845 return (t_inp); 1846 } else { 1847 /* inp is BOUND_V4 no conflict */ 1848 continue; 1849 } 1850 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1851 /* t_inp is bound v4 and v6, conflict always */ 1852 return (t_inp); 1853 } else { 1854 /* t_inp is bound only V4 */ 1855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1856 SCTP_IPV6_V6ONLY(inp)) { 1857 /* no conflict */ 1858 continue; 1859 } 1860 /* else fall through to conflict */ 1861 } 1862 return (t_inp); 1863 } 1864 return (NULL); 1865} 1866 1867 1868int 1869sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1870{ 1871 /* For 1-2-1 with port reuse */ 1872 struct sctppcbhead *head; 1873 struct sctp_inpcb *tinp; 1874 1875 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1876 /* only works with port reuse on */ 1877 return (-1); 1878 } 1879 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1880 return (0); 1881 } 1882 SCTP_INP_RUNLOCK(inp); 1883 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1884 SCTP_BASE_INFO(hashmark))]; 1885 /* Kick out all non-listeners to the TCP hash */ 1886 LIST_FOREACH(tinp, head, sctp_hash) { 1887 if (tinp->sctp_lport != inp->sctp_lport) { 1888 continue; 1889 } 1890 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1891 continue; 1892 } 1893 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1894 continue; 1895 } 1896 if (tinp->sctp_socket->so_qlimit) { 1897 continue; 1898 } 1899 SCTP_INP_WLOCK(tinp); 1900 LIST_REMOVE(tinp, sctp_hash); 1901 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1902 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1903 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1904 SCTP_INP_WUNLOCK(tinp); 1905 } 1906 SCTP_INP_WLOCK(inp); 1907 /* Pull from where he was */ 1908 LIST_REMOVE(inp, sctp_hash); 1909 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1910 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1911 LIST_INSERT_HEAD(head, inp, sctp_hash); 1912 SCTP_INP_WUNLOCK(inp); 1913 SCTP_INP_RLOCK(inp); 1914 return (0); 1915} 1916 1917 1918struct sctp_inpcb * 1919sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1920 uint32_t vrf_id) 1921{ 1922 /* 1923 * First we check the hash table to see if someone has this port 1924 * bound with just the port. 1925 */ 1926 struct sctp_inpcb *inp; 1927 struct sctppcbhead *head; 1928 int lport; 1929 unsigned int i; 1930 1931#ifdef INET 1932 struct sockaddr_in *sin; 1933 1934#endif 1935#ifdef INET6 1936 struct sockaddr_in6 *sin6; 1937 1938#endif 1939 1940 switch (nam->sa_family) { 1941#ifdef INET 1942 case AF_INET: 1943 sin = (struct sockaddr_in *)nam; 1944 lport = sin->sin_port; 1945 break; 1946#endif 1947#ifdef INET6 1948 case AF_INET6: 1949 sin6 = (struct sockaddr_in6 *)nam; 1950 lport = sin6->sin6_port; 1951 break; 1952#endif 1953 default: 1954 return (NULL); 1955 } 1956 /* 1957 * I could cheat here and just cast to one of the types but we will 1958 * do it right. It also provides the check against an Unsupported 1959 * type too. 1960 */ 1961 /* Find the head of the ALLADDR chain */ 1962 if (have_lock == 0) { 1963 SCTP_INP_INFO_RLOCK(); 1964 } 1965 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1966 SCTP_BASE_INFO(hashmark))]; 1967 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1968 1969 /* 1970 * If the TCP model exists it could be that the main listening 1971 * endpoint is gone but there still exists a connected socket for 1972 * this guy. If so we can return the first one that we find. This 1973 * may NOT be the correct one so the caller should be wary on the 1974 * returned INP. Currently the only caller that sets find_tcp_pool 1975 * is in bindx where we are verifying that a user CAN bind the 1976 * address. He either has bound it already, or someone else has, or 1977 * its open to bind, so this is good enough. 1978 */ 1979 if (inp == NULL && find_tcp_pool) { 1980 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1981 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1982 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1983 if (inp) { 1984 break; 1985 } 1986 } 1987 } 1988 if (inp) { 1989 SCTP_INP_INCR_REF(inp); 1990 } 1991 if (have_lock == 0) { 1992 SCTP_INP_INFO_RUNLOCK(); 1993 } 1994 return (inp); 1995} 1996 1997 1998/* 1999 * Find an association for an endpoint with the pointer to whom you want to 2000 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2001 * need to change the *to to some other struct like a mbuf... 2002 */ 2003struct sctp_tcb * 2004sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2005 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2006 uint32_t vrf_id) 2007{ 2008 struct sctp_inpcb *inp = NULL; 2009 struct sctp_tcb *stcb; 2010 2011 SCTP_INP_INFO_RLOCK(); 2012 if (find_tcp_pool) { 2013 if (inp_p != NULL) { 2014 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2015 vrf_id); 2016 } else { 2017 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2018 vrf_id); 2019 } 2020 if (stcb != NULL) { 2021 SCTP_INP_INFO_RUNLOCK(); 2022 return (stcb); 2023 } 2024 } 2025 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2026 if (inp_p != NULL) { 2027 *inp_p = inp; 2028 } 2029 SCTP_INP_INFO_RUNLOCK(); 2030 if (inp == NULL) { 2031 return (NULL); 2032 } 2033 /* 2034 * ok, we have an endpoint, now lets find the assoc for it (if any) 2035 * we now place the source address or from in the to of the find 2036 * endpoint call. Since in reality this chain is used from the 2037 * inbound packet side. 2038 */ 2039 if (inp_p != NULL) { 2040 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2041 NULL); 2042 } else { 2043 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2044 NULL); 2045 } 2046 return (stcb); 2047} 2048 2049 2050/* 2051 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2052 * find all addresses that the sender has specified in any address list. Each 2053 * address will be used to lookup the TCB and see if one exits. 2054 */ 2055static struct sctp_tcb * 2056sctp_findassociation_special_addr(struct mbuf *m, int offset, 2057 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2058 struct sockaddr *dst) 2059{ 2060 struct sctp_paramhdr *phdr, parm_buf; 2061 2062#if defined(INET) || defined(INET6) 2063 struct sctp_tcb *stcb; 2064 uint16_t ptype; 2065 2066#endif 2067 uint16_t plen; 2068 2069#ifdef INET 2070 struct sockaddr_in sin4; 2071 2072#endif 2073#ifdef INET6 2074 struct sockaddr_in6 sin6; 2075 2076#endif 2077 2078#ifdef INET 2079 memset(&sin4, 0, sizeof(sin4)); 2080 sin4.sin_len = sizeof(sin4); 2081 sin4.sin_family = AF_INET; 2082 sin4.sin_port = sh->src_port; 2083#endif 2084#ifdef INET6 2085 memset(&sin6, 0, sizeof(sin6)); 2086 sin6.sin6_len = sizeof(sin6); 2087 sin6.sin6_family = AF_INET6; 2088 sin6.sin6_port = sh->src_port; 2089#endif 2090 2091 offset += sizeof(struct sctp_init_chunk); 2092 2093 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2094 while (phdr != NULL) { 2095 /* now we must see if we want the parameter */ 2096#if defined(INET) || defined(INET6) 2097 ptype = ntohs(phdr->param_type); 2098#endif 2099 plen = ntohs(phdr->param_length); 2100 if (plen == 0) { 2101 break; 2102 } 2103#ifdef INET 2104 if (ptype == SCTP_IPV4_ADDRESS && 2105 plen == sizeof(struct sctp_ipv4addr_param)) { 2106 /* Get the rest of the address */ 2107 struct sctp_ipv4addr_param ip4_parm, *p4; 2108 2109 phdr = sctp_get_next_param(m, offset, 2110 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2111 if (phdr == NULL) { 2112 return (NULL); 2113 } 2114 p4 = (struct sctp_ipv4addr_param *)phdr; 2115 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2116 /* look it up */ 2117 stcb = sctp_findassociation_ep_addr(inp_p, 2118 (struct sockaddr *)&sin4, netp, dst, NULL); 2119 if (stcb != NULL) { 2120 return (stcb); 2121 } 2122 } 2123#endif 2124#ifdef INET6 2125 if (ptype == SCTP_IPV6_ADDRESS && 2126 plen == sizeof(struct sctp_ipv6addr_param)) { 2127 /* Get the rest of the address */ 2128 struct sctp_ipv6addr_param ip6_parm, *p6; 2129 2130 phdr = sctp_get_next_param(m, offset, 2131 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2132 if (phdr == NULL) { 2133 return (NULL); 2134 } 2135 p6 = (struct sctp_ipv6addr_param *)phdr; 2136 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2137 /* look it up */ 2138 stcb = sctp_findassociation_ep_addr(inp_p, 2139 (struct sockaddr *)&sin6, netp, dst, NULL); 2140 if (stcb != NULL) { 2141 return (stcb); 2142 } 2143 } 2144#endif 2145 offset += SCTP_SIZE32(plen); 2146 phdr = sctp_get_next_param(m, offset, &parm_buf, 2147 sizeof(parm_buf)); 2148 } 2149 return (NULL); 2150} 2151 2152static struct sctp_tcb * 2153sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2154 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2155 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2156{ 2157 /* 2158 * Use my vtag to hash. If we find it we then verify the source addr 2159 * is in the assoc. If all goes well we save a bit on rec of a 2160 * packet. 2161 */ 2162 struct sctpasochead *head; 2163 struct sctp_nets *net; 2164 struct sctp_tcb *stcb; 2165 2166 SCTP_INP_INFO_RLOCK(); 2167 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2168 SCTP_BASE_INFO(hashasocmark))]; 2169 if (head == NULL) { 2170 /* invalid vtag */ 2171 SCTP_INP_INFO_RUNLOCK(); 2172 return (NULL); 2173 } 2174 LIST_FOREACH(stcb, head, sctp_asocs) { 2175 SCTP_INP_RLOCK(stcb->sctp_ep); 2176 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2177 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2178 continue; 2179 } 2180 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2181 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2182 continue; 2183 } 2184 SCTP_TCB_LOCK(stcb); 2185 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2186 if (stcb->asoc.my_vtag == vtag) { 2187 /* candidate */ 2188 if (stcb->rport != rport) { 2189 SCTP_TCB_UNLOCK(stcb); 2190 continue; 2191 } 2192 if (stcb->sctp_ep->sctp_lport != lport) { 2193 SCTP_TCB_UNLOCK(stcb); 2194 continue; 2195 } 2196 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 /* RRS:Need toaddr check here */ 2201 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2202 /* Endpoint does not own this address */ 2203 SCTP_TCB_UNLOCK(stcb); 2204 continue; 2205 } 2206 if (remote_tag) { 2207 /* 2208 * If we have both vtags that's all we match 2209 * on 2210 */ 2211 if (stcb->asoc.peer_vtag == remote_tag) { 2212 /* 2213 * If both tags match we consider it 2214 * conclusive and check NO 2215 * source/destination addresses 2216 */ 2217 goto conclusive; 2218 } 2219 } 2220 if (skip_src_check) { 2221 conclusive: 2222 if (from) { 2223 *netp = sctp_findnet(stcb, from); 2224 } else { 2225 *netp = NULL; /* unknown */ 2226 } 2227 if (inp_p) 2228 *inp_p = stcb->sctp_ep; 2229 SCTP_INP_INFO_RUNLOCK(); 2230 return (stcb); 2231 } 2232 net = sctp_findnet(stcb, from); 2233 if (net) { 2234 /* yep its him. */ 2235 *netp = net; 2236 SCTP_STAT_INCR(sctps_vtagexpress); 2237 *inp_p = stcb->sctp_ep; 2238 SCTP_INP_INFO_RUNLOCK(); 2239 return (stcb); 2240 } else { 2241 /* 2242 * not him, this should only happen in rare 2243 * cases so I peg it. 2244 */ 2245 SCTP_STAT_INCR(sctps_vtagbogus); 2246 } 2247 } 2248 SCTP_TCB_UNLOCK(stcb); 2249 } 2250 SCTP_INP_INFO_RUNLOCK(); 2251 return (NULL); 2252} 2253 2254 2255/* 2256 * Find an association with the pointer to the inbound IP packet. This can be 2257 * a IPv4 or IPv6 packet. 2258 */ 2259struct sctp_tcb * 2260sctp_findassociation_addr(struct mbuf *m, int offset, 2261 struct sockaddr *src, struct sockaddr *dst, 2262 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2263 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2264{ 2265 int find_tcp_pool; 2266 struct sctp_tcb *stcb; 2267 struct sctp_inpcb *inp; 2268 2269 if (sh->v_tag) { 2270 /* we only go down this path if vtag is non-zero */ 2271 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2272 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2273 if (stcb) { 2274 return (stcb); 2275 } 2276 } 2277 find_tcp_pool = 0; 2278 if ((ch->chunk_type != SCTP_INITIATION) && 2279 (ch->chunk_type != SCTP_INITIATION_ACK) && 2280 (ch->chunk_type != SCTP_COOKIE_ACK) && 2281 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2282 /* Other chunk types go to the tcp pool. */ 2283 find_tcp_pool = 1; 2284 } 2285 if (inp_p) { 2286 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2287 find_tcp_pool, vrf_id); 2288 inp = *inp_p; 2289 } else { 2290 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2291 find_tcp_pool, vrf_id); 2292 } 2293 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2294 if (stcb == NULL && inp) { 2295 /* Found a EP but not this address */ 2296 if ((ch->chunk_type == SCTP_INITIATION) || 2297 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2298 /*- 2299 * special hook, we do NOT return linp or an 2300 * association that is linked to an existing 2301 * association that is under the TCP pool (i.e. no 2302 * listener exists). The endpoint finding routine 2303 * will always find a listener before examining the 2304 * TCP pool. 2305 */ 2306 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2307 if (inp_p) { 2308 *inp_p = NULL; 2309 } 2310 return (NULL); 2311 } 2312 stcb = sctp_findassociation_special_addr(m, 2313 offset, sh, &inp, netp, dst); 2314 if (inp_p != NULL) { 2315 *inp_p = inp; 2316 } 2317 } 2318 } 2319 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2320 return (stcb); 2321} 2322 2323/* 2324 * lookup an association by an ASCONF lookup address. 2325 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2326 */ 2327struct sctp_tcb * 2328sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2329 struct sockaddr *dst, struct sctphdr *sh, 2330 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2331{ 2332 struct sctp_tcb *stcb; 2333 union sctp_sockstore remote_store; 2334 struct sctp_paramhdr parm_buf, *phdr; 2335 int ptype; 2336 int zero_address = 0; 2337 2338#ifdef INET 2339 struct sockaddr_in *sin; 2340 2341#endif 2342#ifdef INET6 2343 struct sockaddr_in6 *sin6; 2344 2345#endif 2346 2347 memset(&remote_store, 0, sizeof(remote_store)); 2348 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2349 &parm_buf, sizeof(struct sctp_paramhdr)); 2350 if (phdr == NULL) { 2351 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2352 __FUNCTION__); 2353 return NULL; 2354 } 2355 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2356 /* get the correlation address */ 2357 switch (ptype) { 2358#ifdef INET6 2359 case SCTP_IPV6_ADDRESS: 2360 { 2361 /* ipv6 address param */ 2362 struct sctp_ipv6addr_param *p6, p6_buf; 2363 2364 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2365 return NULL; 2366 } 2367 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2368 offset + sizeof(struct sctp_asconf_chunk), 2369 &p6_buf.ph, sizeof(*p6)); 2370 if (p6 == NULL) { 2371 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2372 __FUNCTION__); 2373 return (NULL); 2374 } 2375 sin6 = &remote_store.sin6; 2376 sin6->sin6_family = AF_INET6; 2377 sin6->sin6_len = sizeof(*sin6); 2378 sin6->sin6_port = sh->src_port; 2379 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2380 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2381 zero_address = 1; 2382 break; 2383 } 2384#endif 2385#ifdef INET 2386 case SCTP_IPV4_ADDRESS: 2387 { 2388 /* ipv4 address param */ 2389 struct sctp_ipv4addr_param *p4, p4_buf; 2390 2391 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2392 return NULL; 2393 } 2394 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2395 offset + sizeof(struct sctp_asconf_chunk), 2396 &p4_buf.ph, sizeof(*p4)); 2397 if (p4 == NULL) { 2398 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2399 __FUNCTION__); 2400 return (NULL); 2401 } 2402 sin = &remote_store.sin; 2403 sin->sin_family = AF_INET; 2404 sin->sin_len = sizeof(*sin); 2405 sin->sin_port = sh->src_port; 2406 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2407 if (sin->sin_addr.s_addr == INADDR_ANY) 2408 zero_address = 1; 2409 break; 2410 } 2411#endif 2412 default: 2413 /* invalid address param type */ 2414 return NULL; 2415 } 2416 2417 if (zero_address) { 2418 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2419 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2420 if (stcb != NULL) { 2421 SCTP_INP_DECR_REF(*inp_p); 2422 } 2423 } else { 2424 stcb = sctp_findassociation_ep_addr(inp_p, 2425 &remote_store.sa, netp, 2426 dst, NULL); 2427 } 2428 return (stcb); 2429} 2430 2431 2432/* 2433 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2434 * addresses. This way if we don't get a bind we by default pick a ephemeral 2435 * port with all addresses bound. 2436 */ 2437int 2438sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2439{ 2440 /* 2441 * we get called when a new endpoint starts up. We need to allocate 2442 * the sctp_inpcb structure from the zone and init it. Mark it as 2443 * unbound and find a port that we can use as an ephemeral with 2444 * INADDR_ANY. If the user binds later no problem we can then add in 2445 * the specific addresses. And setup the default parameters for the 2446 * EP. 2447 */ 2448 int i, error; 2449 struct sctp_inpcb *inp; 2450 struct sctp_pcb *m; 2451 struct timeval time; 2452 sctp_sharedkey_t *null_key; 2453 2454 error = 0; 2455 2456 SCTP_INP_INFO_WLOCK(); 2457 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2458 if (inp == NULL) { 2459 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2460 SCTP_INP_INFO_WUNLOCK(); 2461 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2462 return (ENOBUFS); 2463 } 2464 /* zap it */ 2465 bzero(inp, sizeof(*inp)); 2466 2467 /* bump generations */ 2468 /* setup socket pointers */ 2469 inp->sctp_socket = so; 2470 inp->ip_inp.inp.inp_socket = so; 2471 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2472#ifdef INET6 2473 if (INP_SOCKAF(so) == AF_INET6) { 2474 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2475 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2476 } 2477 if (MODULE_GLOBAL(ip6_v6only)) { 2478 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2479 } 2480 } 2481#endif 2482 inp->sctp_associd_counter = 1; 2483 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2484 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2485 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2486 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2487 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2488 if (SCTP_BASE_SYSCTL(sctp_auth_disable)) { 2489 inp->auth_supported = 0; 2490 } else { 2491 inp->auth_supported = 1; 2492 } 2493 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2494 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2495 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2496 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2497 /* init the small hash table we use to track asocid <-> tcb */ 2498 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2499 if (inp->sctp_asocidhash == NULL) { 2500 crfree(inp->ip_inp.inp.inp_cred); 2501 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2502 SCTP_INP_INFO_WUNLOCK(); 2503 return (ENOBUFS); 2504 } 2505#ifdef IPSEC 2506 { 2507 struct inpcbpolicy *pcb_sp = NULL; 2508 2509 error = ipsec_init_policy(so, &pcb_sp); 2510 /* Arrange to share the policy */ 2511 inp->ip_inp.inp.inp_sp = pcb_sp; 2512 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2513 } 2514 if (error != 0) { 2515 crfree(inp->ip_inp.inp.inp_cred); 2516 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2517 SCTP_INP_INFO_WUNLOCK(); 2518 return error; 2519 } 2520#endif /* IPSEC */ 2521 SCTP_INCR_EP_COUNT(); 2522 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2523 SCTP_INP_INFO_WUNLOCK(); 2524 2525 so->so_pcb = (caddr_t)inp; 2526 2527 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2528 /* UDP style socket */ 2529 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2530 SCTP_PCB_FLAGS_UNBOUND); 2531 /* Be sure it is NON-BLOCKING IO for UDP */ 2532 /* SCTP_SET_SO_NBIO(so); */ 2533 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2534 /* TCP style socket */ 2535 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2536 SCTP_PCB_FLAGS_UNBOUND); 2537 /* Be sure we have blocking IO by default */ 2538 SCTP_CLEAR_SO_NBIO(so); 2539 } else { 2540 /* 2541 * unsupported socket type (RAW, etc)- in case we missed it 2542 * in protosw 2543 */ 2544 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2545 so->so_pcb = NULL; 2546 crfree(inp->ip_inp.inp.inp_cred); 2547 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2548 return (EOPNOTSUPP); 2549 } 2550 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2551 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2552 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2553 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2554 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2555 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2556 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2557 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2558 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2559 } 2560 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2561 &inp->sctp_hashmark); 2562 if (inp->sctp_tcbhash == NULL) { 2563 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2564 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2565 so->so_pcb = NULL; 2566 crfree(inp->ip_inp.inp.inp_cred); 2567 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2568 return (ENOBUFS); 2569 } 2570 inp->def_vrf_id = vrf_id; 2571 2572 SCTP_INP_INFO_WLOCK(); 2573 SCTP_INP_LOCK_INIT(inp); 2574 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2575 SCTP_INP_READ_INIT(inp); 2576 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2577 /* lock the new ep */ 2578 SCTP_INP_WLOCK(inp); 2579 2580 /* add it to the info area */ 2581 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2582 SCTP_INP_INFO_WUNLOCK(); 2583 2584 TAILQ_INIT(&inp->read_queue); 2585 LIST_INIT(&inp->sctp_addr_list); 2586 2587 LIST_INIT(&inp->sctp_asoc_list); 2588 2589#ifdef SCTP_TRACK_FREED_ASOCS 2590 /* TEMP CODE */ 2591 LIST_INIT(&inp->sctp_asoc_free_list); 2592#endif 2593 /* Init the timer structure for signature change */ 2594 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2595 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2596 2597 /* now init the actual endpoint default data */ 2598 m = &inp->sctp_ep; 2599 2600 /* setup the base timeout information */ 2601 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2602 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2603 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2604 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2605 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2606 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2607 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2608 /* all max/min max are in ms */ 2609 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2610 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2611 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2612 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2613 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2614 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2615 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2616 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2617 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2618 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2619 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2620 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2621 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2622 2623 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2624 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2625 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2626 /* number of streams to pre-open on a association */ 2627 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2628 2629 /* Add adaptation cookie */ 2630 m->adaptation_layer_indicator = 0; 2631 m->adaptation_layer_indicator_provided = 0; 2632 2633 /* seed random number generator */ 2634 m->random_counter = 1; 2635 m->store_at = SCTP_SIGNATURE_SIZE; 2636 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2637 sctp_fill_random_store(m); 2638 2639 /* Minimum cookie size */ 2640 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2641 sizeof(struct sctp_state_cookie); 2642 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2643 2644 /* Setup the initial secret */ 2645 (void)SCTP_GETTIME_TIMEVAL(&time); 2646 m->time_of_secret_change = time.tv_sec; 2647 2648 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2649 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2650 } 2651 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2652 2653 /* How long is a cookie good for ? */ 2654 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2655 /* 2656 * Initialize authentication parameters 2657 */ 2658 m->local_hmacs = sctp_default_supported_hmaclist(); 2659 m->local_auth_chunks = sctp_alloc_chunklist(); 2660 if (inp->asconf_supported) { 2661 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2662 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2663 } 2664 m->default_dscp = 0; 2665#ifdef INET6 2666 m->default_flowlabel = 0; 2667#endif 2668 m->port = 0; /* encapsulation disabled by default */ 2669 LIST_INIT(&m->shared_keys); 2670 /* add default NULL key as key id 0 */ 2671 null_key = sctp_alloc_sharedkey(); 2672 sctp_insert_sharedkey(&m->shared_keys, null_key); 2673 SCTP_INP_WUNLOCK(inp); 2674#ifdef SCTP_LOG_CLOSING 2675 sctp_log_closing(inp, NULL, 12); 2676#endif 2677 return (error); 2678} 2679 2680 2681void 2682sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2683 struct sctp_tcb *stcb) 2684{ 2685 struct sctp_nets *net; 2686 uint16_t lport, rport; 2687 struct sctppcbhead *head; 2688 struct sctp_laddr *laddr, *oladdr; 2689 2690 atomic_add_int(&stcb->asoc.refcnt, 1); 2691 SCTP_TCB_UNLOCK(stcb); 2692 SCTP_INP_INFO_WLOCK(); 2693 SCTP_INP_WLOCK(old_inp); 2694 SCTP_INP_WLOCK(new_inp); 2695 SCTP_TCB_LOCK(stcb); 2696 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2697 2698 new_inp->sctp_ep.time_of_secret_change = 2699 old_inp->sctp_ep.time_of_secret_change; 2700 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2701 sizeof(old_inp->sctp_ep.secret_key)); 2702 new_inp->sctp_ep.current_secret_number = 2703 old_inp->sctp_ep.current_secret_number; 2704 new_inp->sctp_ep.last_secret_number = 2705 old_inp->sctp_ep.last_secret_number; 2706 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2707 2708 /* make it so new data pours into the new socket */ 2709 stcb->sctp_socket = new_inp->sctp_socket; 2710 stcb->sctp_ep = new_inp; 2711 2712 /* Copy the port across */ 2713 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2714 rport = stcb->rport; 2715 /* Pull the tcb from the old association */ 2716 LIST_REMOVE(stcb, sctp_tcbhash); 2717 LIST_REMOVE(stcb, sctp_tcblist); 2718 if (stcb->asoc.in_asocid_hash) { 2719 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2720 } 2721 /* Now insert the new_inp into the TCP connected hash */ 2722 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2723 2724 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2725 /* Its safe to access */ 2726 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2727 2728 /* Now move the tcb into the endpoint list */ 2729 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2730 /* 2731 * Question, do we even need to worry about the ep-hash since we 2732 * only have one connection? Probably not :> so lets get rid of it 2733 * and not suck up any kernel memory in that. 2734 */ 2735 if (stcb->asoc.in_asocid_hash) { 2736 struct sctpasochead *lhd; 2737 2738 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2739 new_inp->hashasocidmark)]; 2740 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2741 } 2742 /* Ok. Let's restart timer. */ 2743 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2744 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2745 stcb, net); 2746 } 2747 2748 SCTP_INP_INFO_WUNLOCK(); 2749 if (new_inp->sctp_tcbhash != NULL) { 2750 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2751 new_inp->sctp_tcbhash = NULL; 2752 } 2753 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2754 /* Subset bound, so copy in the laddr list from the old_inp */ 2755 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2756 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2757 if (laddr == NULL) { 2758 /* 2759 * Gak, what can we do? This assoc is really 2760 * HOSED. We probably should send an abort 2761 * here. 2762 */ 2763 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2764 continue; 2765 } 2766 SCTP_INCR_LADDR_COUNT(); 2767 bzero(laddr, sizeof(*laddr)); 2768 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2769 laddr->ifa = oladdr->ifa; 2770 atomic_add_int(&laddr->ifa->refcount, 1); 2771 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2772 sctp_nxt_addr); 2773 new_inp->laddr_count++; 2774 if (oladdr == stcb->asoc.last_used_address) { 2775 stcb->asoc.last_used_address = laddr; 2776 } 2777 } 2778 } 2779 /* 2780 * Now any running timers need to be adjusted since we really don't 2781 * care if they are running or not just blast in the new_inp into 2782 * all of them. 2783 */ 2784 2785 stcb->asoc.dack_timer.ep = (void *)new_inp; 2786 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2787 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2788 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2789 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2790 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2791 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2792 /* now what about the nets? */ 2793 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2794 net->pmtu_timer.ep = (void *)new_inp; 2795 net->hb_timer.ep = (void *)new_inp; 2796 net->rxt_timer.ep = (void *)new_inp; 2797 } 2798 SCTP_INP_WUNLOCK(new_inp); 2799 SCTP_INP_WUNLOCK(old_inp); 2800} 2801 2802 2803 2804 2805/* sctp_ifap is used to bypass normal local address validation checks */ 2806int 2807sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2808 struct sctp_ifa *sctp_ifap, struct thread *p) 2809{ 2810 /* bind a ep to a socket address */ 2811 struct sctppcbhead *head; 2812 struct sctp_inpcb *inp, *inp_tmp; 2813 struct inpcb *ip_inp; 2814 int port_reuse_active = 0; 2815 int bindall; 2816 uint16_t lport; 2817 int error; 2818 uint32_t vrf_id; 2819 2820 lport = 0; 2821 bindall = 1; 2822 inp = (struct sctp_inpcb *)so->so_pcb; 2823 ip_inp = (struct inpcb *)so->so_pcb; 2824#ifdef SCTP_DEBUG 2825 if (addr) { 2826 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2827 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2828 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2829 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2830 } 2831#endif 2832 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2833 /* already did a bind, subsequent binds NOT allowed ! */ 2834 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2835 return (EINVAL); 2836 } 2837#ifdef INVARIANTS 2838 if (p == NULL) 2839 panic("null proc/thread"); 2840#endif 2841 if (addr != NULL) { 2842 switch (addr->sa_family) { 2843#ifdef INET 2844 case AF_INET: 2845 { 2846 struct sockaddr_in *sin; 2847 2848 /* IPV6_V6ONLY socket? */ 2849 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2850 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2851 return (EINVAL); 2852 } 2853 if (addr->sa_len != sizeof(*sin)) { 2854 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2855 return (EINVAL); 2856 } 2857 sin = (struct sockaddr_in *)addr; 2858 lport = sin->sin_port; 2859 /* 2860 * For LOOPBACK the prison_local_ip4() call 2861 * will transmute the ip address to the 2862 * proper value. 2863 */ 2864 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2865 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2866 return (error); 2867 } 2868 if (sin->sin_addr.s_addr != INADDR_ANY) { 2869 bindall = 0; 2870 } 2871 break; 2872 } 2873#endif 2874#ifdef INET6 2875 case AF_INET6: 2876 { 2877 /* 2878 * Only for pure IPv6 Address. (No IPv4 2879 * Mapped!) 2880 */ 2881 struct sockaddr_in6 *sin6; 2882 2883 sin6 = (struct sockaddr_in6 *)addr; 2884 2885 if (addr->sa_len != sizeof(*sin6)) { 2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2887 return (EINVAL); 2888 } 2889 lport = sin6->sin6_port; 2890 /* 2891 * For LOOPBACK the prison_local_ip6() call 2892 * will transmute the ipv6 address to the 2893 * proper value. 2894 */ 2895 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2896 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2898 return (error); 2899 } 2900 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2901 bindall = 0; 2902 /* KAME hack: embed scopeid */ 2903 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2904 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2905 return (EINVAL); 2906 } 2907 } 2908 /* this must be cleared for ifa_ifwithaddr() */ 2909 sin6->sin6_scope_id = 0; 2910 break; 2911 } 2912#endif 2913 default: 2914 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2915 return (EAFNOSUPPORT); 2916 } 2917 } 2918 SCTP_INP_INFO_WLOCK(); 2919 SCTP_INP_WLOCK(inp); 2920 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2921 vrf_id = inp->def_vrf_id; 2922 2923 /* increase our count due to the unlock we do */ 2924 SCTP_INP_INCR_REF(inp); 2925 if (lport) { 2926 /* 2927 * Did the caller specify a port? if so we must see if an ep 2928 * already has this one bound. 2929 */ 2930 /* got to be root to get at low ports */ 2931 if (ntohs(lport) < IPPORT_RESERVED) { 2932 if (p && (error = 2933 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2934 )) { 2935 SCTP_INP_DECR_REF(inp); 2936 SCTP_INP_WUNLOCK(inp); 2937 SCTP_INP_INFO_WUNLOCK(); 2938 return (error); 2939 } 2940 } 2941 SCTP_INP_WUNLOCK(inp); 2942 if (bindall) { 2943 vrf_id = inp->def_vrf_id; 2944 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2945 if (inp_tmp != NULL) { 2946 /* 2947 * lock guy returned and lower count note 2948 * that we are not bound so inp_tmp should 2949 * NEVER be inp. And it is this inp 2950 * (inp_tmp) that gets the reference bump, 2951 * so we must lower it. 2952 */ 2953 SCTP_INP_DECR_REF(inp_tmp); 2954 /* unlock info */ 2955 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2956 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2957 /* 2958 * Ok, must be one-2-one and 2959 * allowing port re-use 2960 */ 2961 port_reuse_active = 1; 2962 goto continue_anyway; 2963 } 2964 SCTP_INP_DECR_REF(inp); 2965 SCTP_INP_INFO_WUNLOCK(); 2966 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2967 return (EADDRINUSE); 2968 } 2969 } else { 2970 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2971 if (inp_tmp != NULL) { 2972 /* 2973 * lock guy returned and lower count note 2974 * that we are not bound so inp_tmp should 2975 * NEVER be inp. And it is this inp 2976 * (inp_tmp) that gets the reference bump, 2977 * so we must lower it. 2978 */ 2979 SCTP_INP_DECR_REF(inp_tmp); 2980 /* unlock info */ 2981 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2982 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2983 /* 2984 * Ok, must be one-2-one and 2985 * allowing port re-use 2986 */ 2987 port_reuse_active = 1; 2988 goto continue_anyway; 2989 } 2990 SCTP_INP_DECR_REF(inp); 2991 SCTP_INP_INFO_WUNLOCK(); 2992 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2993 return (EADDRINUSE); 2994 } 2995 } 2996continue_anyway: 2997 SCTP_INP_WLOCK(inp); 2998 if (bindall) { 2999 /* verify that no lport is not used by a singleton */ 3000 if ((port_reuse_active == 0) && 3001 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3002 /* Sorry someone already has this one bound */ 3003 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3004 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3005 port_reuse_active = 1; 3006 } else { 3007 SCTP_INP_DECR_REF(inp); 3008 SCTP_INP_WUNLOCK(inp); 3009 SCTP_INP_INFO_WUNLOCK(); 3010 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3011 return (EADDRINUSE); 3012 } 3013 } 3014 } 3015 } else { 3016 uint16_t first, last, candidate; 3017 uint16_t count; 3018 int done; 3019 3020 if (ip_inp->inp_flags & INP_HIGHPORT) { 3021 first = MODULE_GLOBAL(ipport_hifirstauto); 3022 last = MODULE_GLOBAL(ipport_hilastauto); 3023 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3024 if (p && (error = 3025 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3026 )) { 3027 SCTP_INP_DECR_REF(inp); 3028 SCTP_INP_WUNLOCK(inp); 3029 SCTP_INP_INFO_WUNLOCK(); 3030 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3031 return (error); 3032 } 3033 first = MODULE_GLOBAL(ipport_lowfirstauto); 3034 last = MODULE_GLOBAL(ipport_lowlastauto); 3035 } else { 3036 first = MODULE_GLOBAL(ipport_firstauto); 3037 last = MODULE_GLOBAL(ipport_lastauto); 3038 } 3039 if (first > last) { 3040 uint16_t temp; 3041 3042 temp = first; 3043 first = last; 3044 last = temp; 3045 } 3046 count = last - first + 1; /* number of candidates */ 3047 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3048 3049 done = 0; 3050 while (!done) { 3051 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3052 done = 1; 3053 } 3054 if (!done) { 3055 if (--count == 0) { 3056 SCTP_INP_DECR_REF(inp); 3057 SCTP_INP_WUNLOCK(inp); 3058 SCTP_INP_INFO_WUNLOCK(); 3059 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3060 return (EADDRINUSE); 3061 } 3062 if (candidate == last) 3063 candidate = first; 3064 else 3065 candidate = candidate + 1; 3066 } 3067 } 3068 lport = htons(candidate); 3069 } 3070 SCTP_INP_DECR_REF(inp); 3071 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3072 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3073 /* 3074 * this really should not happen. The guy did a non-blocking 3075 * bind and then did a close at the same time. 3076 */ 3077 SCTP_INP_WUNLOCK(inp); 3078 SCTP_INP_INFO_WUNLOCK(); 3079 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3080 return (EINVAL); 3081 } 3082 /* ok we look clear to give out this port, so lets setup the binding */ 3083 if (bindall) { 3084 /* binding to all addresses, so just set in the proper flags */ 3085 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3086 /* set the automatic addr changes from kernel flag */ 3087 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3088 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3089 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3090 } else { 3091 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3092 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3093 } 3094 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3095 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3096 } else { 3097 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3098 } 3099 /* 3100 * set the automatic mobility_base from kernel flag (by 3101 * micchie) 3102 */ 3103 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3106 } else { 3107 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3109 } 3110 /* 3111 * set the automatic mobility_fasthandoff from kernel flag 3112 * (by micchie) 3113 */ 3114 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3115 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3116 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3117 } else { 3118 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3119 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3120 } 3121 } else { 3122 /* 3123 * bind specific, make sure flags is off and add a new 3124 * address structure to the sctp_addr_list inside the ep 3125 * structure. 3126 * 3127 * We will need to allocate one and insert it at the head. The 3128 * socketopt call can just insert new addresses in there as 3129 * well. It will also have to do the embed scope kame hack 3130 * too (before adding). 3131 */ 3132 struct sctp_ifa *ifa; 3133 union sctp_sockstore store; 3134 3135 memset(&store, 0, sizeof(store)); 3136 switch (addr->sa_family) { 3137#ifdef INET 3138 case AF_INET: 3139 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3140 store.sin.sin_port = 0; 3141 break; 3142#endif 3143#ifdef INET6 3144 case AF_INET6: 3145 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3146 store.sin6.sin6_port = 0; 3147 break; 3148#endif 3149 default: 3150 break; 3151 } 3152 /* 3153 * first find the interface with the bound address need to 3154 * zero out the port to find the address! yuck! can't do 3155 * this earlier since need port for sctp_pcb_findep() 3156 */ 3157 if (sctp_ifap != NULL) { 3158 ifa = sctp_ifap; 3159 } else { 3160 /* 3161 * Note for BSD we hit here always other O/S's will 3162 * pass things in via the sctp_ifap argument 3163 * (Panda). 3164 */ 3165 ifa = sctp_find_ifa_by_addr(&store.sa, 3166 vrf_id, SCTP_ADDR_NOT_LOCKED); 3167 } 3168 if (ifa == NULL) { 3169 /* Can't find an interface with that address */ 3170 SCTP_INP_WUNLOCK(inp); 3171 SCTP_INP_INFO_WUNLOCK(); 3172 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3173 return (EADDRNOTAVAIL); 3174 } 3175#ifdef INET6 3176 if (addr->sa_family == AF_INET6) { 3177 /* GAK, more FIXME IFA lock? */ 3178 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3179 /* Can't bind a non-existent addr. */ 3180 SCTP_INP_WUNLOCK(inp); 3181 SCTP_INP_INFO_WUNLOCK(); 3182 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3183 return (EINVAL); 3184 } 3185 } 3186#endif 3187 /* we're not bound all */ 3188 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3189 /* allow bindx() to send ASCONF's for binding changes */ 3190 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3191 /* clear automatic addr changes from kernel flag */ 3192 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3193 3194 /* add this address to the endpoint list */ 3195 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3196 if (error != 0) { 3197 SCTP_INP_WUNLOCK(inp); 3198 SCTP_INP_INFO_WUNLOCK(); 3199 return (error); 3200 } 3201 inp->laddr_count++; 3202 } 3203 /* find the bucket */ 3204 if (port_reuse_active) { 3205 /* Put it into tcp 1-2-1 hash */ 3206 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3207 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3208 } else { 3209 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3210 } 3211 /* put it in the bucket */ 3212 LIST_INSERT_HEAD(head, inp, sctp_hash); 3213 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3214 (void *)head, ntohs(lport), port_reuse_active); 3215 /* set in the port */ 3216 inp->sctp_lport = lport; 3217 3218 /* turn off just the unbound flag */ 3219 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3220 SCTP_INP_WUNLOCK(inp); 3221 SCTP_INP_INFO_WUNLOCK(); 3222 return (0); 3223} 3224 3225 3226static void 3227sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3228{ 3229 struct sctp_iterator *it, *nit; 3230 3231 /* 3232 * We enter with the only the ITERATOR_LOCK in place and a write 3233 * lock on the inp_info stuff. 3234 */ 3235 it = sctp_it_ctl.cur_it; 3236 if (it && (it->vn != curvnet)) { 3237 /* Its not looking at our VNET */ 3238 return; 3239 } 3240 if (it && (it->inp == inp)) { 3241 /* 3242 * This is tricky and we hold the iterator lock, but when it 3243 * returns and gets the lock (when we release it) the 3244 * iterator will try to operate on inp. We need to stop that 3245 * from happening. But of course the iterator has a 3246 * reference on the stcb and inp. We can mark it and it will 3247 * stop. 3248 * 3249 * If its a single iterator situation, we set the end iterator 3250 * flag. Otherwise we set the iterator to go to the next 3251 * inp. 3252 * 3253 */ 3254 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3255 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3256 } else { 3257 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3258 } 3259 } 3260 /* 3261 * Now go through and remove any single reference to our inp that 3262 * may be still pending on the list 3263 */ 3264 SCTP_IPI_ITERATOR_WQ_LOCK(); 3265 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3266 if (it->vn != curvnet) { 3267 continue; 3268 } 3269 if (it->inp == inp) { 3270 /* This one points to me is it inp specific? */ 3271 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3272 /* Remove and free this one */ 3273 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3274 it, sctp_nxt_itr); 3275 if (it->function_atend != NULL) { 3276 (*it->function_atend) (it->pointer, it->val); 3277 } 3278 SCTP_FREE(it, SCTP_M_ITER); 3279 } else { 3280 it->inp = LIST_NEXT(it->inp, sctp_list); 3281 if (it->inp) { 3282 SCTP_INP_INCR_REF(it->inp); 3283 } 3284 } 3285 /* 3286 * When its put in the refcnt is incremented so decr 3287 * it 3288 */ 3289 SCTP_INP_DECR_REF(inp); 3290 } 3291 } 3292 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3293} 3294 3295/* release sctp_inpcb unbind the port */ 3296void 3297sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3298{ 3299 /* 3300 * Here we free a endpoint. We must find it (if it is in the Hash 3301 * table) and remove it from there. Then we must also find it in the 3302 * overall list and remove it from there. After all removals are 3303 * complete then any timer has to be stopped. Then start the actual 3304 * freeing. a) Any local lists. b) Any associations. c) The hash of 3305 * all associations. d) finally the ep itself. 3306 */ 3307 struct sctp_tcb *asoc, *nasoc; 3308 struct sctp_laddr *laddr, *nladdr; 3309 struct inpcb *ip_pcb; 3310 struct socket *so; 3311 int being_refed = 0; 3312 struct sctp_queued_to_read *sq, *nsq; 3313 int cnt; 3314 sctp_sharedkey_t *shared_key, *nshared_key; 3315 3316 3317#ifdef SCTP_LOG_CLOSING 3318 sctp_log_closing(inp, NULL, 0); 3319#endif 3320 SCTP_ITERATOR_LOCK(); 3321 /* mark any iterators on the list or being processed */ 3322 sctp_iterator_inp_being_freed(inp); 3323 SCTP_ITERATOR_UNLOCK(); 3324 so = inp->sctp_socket; 3325 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3326 /* been here before.. eeks.. get out of here */ 3327 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3328#ifdef SCTP_LOG_CLOSING 3329 sctp_log_closing(inp, NULL, 1); 3330#endif 3331 return; 3332 } 3333 SCTP_ASOC_CREATE_LOCK(inp); 3334 SCTP_INP_INFO_WLOCK(); 3335 3336 SCTP_INP_WLOCK(inp); 3337 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3338 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3339 /* socket is gone, so no more wakeups allowed */ 3340 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3341 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3342 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3343 3344 } 3345 /* First time through we have the socket lock, after that no more. */ 3346 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3347 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3348 3349 if (inp->control) { 3350 sctp_m_freem(inp->control); 3351 inp->control = NULL; 3352 } 3353 if (inp->pkt) { 3354 sctp_m_freem(inp->pkt); 3355 inp->pkt = NULL; 3356 } 3357 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3358 * here but I will be nice :> (i.e. 3359 * ip_pcb = ep;) */ 3360 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3361 int cnt_in_sd; 3362 3363 cnt_in_sd = 0; 3364 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3365 SCTP_TCB_LOCK(asoc); 3366 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3367 /* Skip guys being freed */ 3368 cnt_in_sd++; 3369 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3370 /* 3371 * Special case - we did not start a 3372 * kill timer on the asoc due to it 3373 * was not closed. So go ahead and 3374 * start it now. 3375 */ 3376 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3377 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3378 } 3379 SCTP_TCB_UNLOCK(asoc); 3380 continue; 3381 } 3382 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3383 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3384 (asoc->asoc.total_output_queue_size == 0)) { 3385 /* 3386 * If we have data in queue, we don't want 3387 * to just free since the app may have done, 3388 * send()/close or connect/send/close. And 3389 * it wants the data to get across first. 3390 */ 3391 /* Just abandon things in the front states */ 3392 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3393 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3394 cnt_in_sd++; 3395 } 3396 continue; 3397 } 3398 /* Disconnect the socket please */ 3399 asoc->sctp_socket = NULL; 3400 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3401 if ((asoc->asoc.size_on_reasm_queue > 0) || 3402 (asoc->asoc.control_pdapi) || 3403 (asoc->asoc.size_on_all_streams > 0) || 3404 (so && (so->so_rcv.sb_cc > 0))) { 3405 /* Left with Data unread */ 3406 struct mbuf *op_err; 3407 3408 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3409 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3410 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3411 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3412 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3413 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3414 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3415 } 3416 if (sctp_free_assoc(inp, asoc, 3417 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3418 cnt_in_sd++; 3419 } 3420 continue; 3421 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3422 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3423 (asoc->asoc.stream_queue_cnt == 0)) { 3424 if (asoc->asoc.locked_on_sending) { 3425 goto abort_anyway; 3426 } 3427 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3428 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3429 struct sctp_nets *netp; 3430 3431 /* 3432 * there is nothing queued to send, 3433 * so I send shutdown 3434 */ 3435 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3436 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3437 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3438 } 3439 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3440 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3441 sctp_stop_timers_for_shutdown(asoc); 3442 if (asoc->asoc.alternate) { 3443 netp = asoc->asoc.alternate; 3444 } else { 3445 netp = asoc->asoc.primary_destination; 3446 } 3447 sctp_send_shutdown(asoc, netp); 3448 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3449 netp); 3450 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3451 asoc->asoc.primary_destination); 3452 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3453 } 3454 } else { 3455 /* mark into shutdown pending */ 3456 struct sctp_stream_queue_pending *sp; 3457 3458 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3459 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3460 asoc->asoc.primary_destination); 3461 if (asoc->asoc.locked_on_sending) { 3462 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3463 sctp_streamhead); 3464 if (sp == NULL) { 3465 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3466 (void *)asoc->asoc.locked_on_sending, 3467 asoc->asoc.locked_on_sending->stream_no); 3468 } else { 3469 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3470 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3471 } 3472 } 3473 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3474 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3475 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3476 struct mbuf *op_err; 3477 3478 abort_anyway: 3479 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3480 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3481 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3482 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3483 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3484 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3485 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3486 } 3487 if (sctp_free_assoc(inp, asoc, 3488 SCTP_PCBFREE_NOFORCE, 3489 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3490 cnt_in_sd++; 3491 } 3492 continue; 3493 } else { 3494 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3495 } 3496 } 3497 cnt_in_sd++; 3498 SCTP_TCB_UNLOCK(asoc); 3499 } 3500 /* now is there some left in our SHUTDOWN state? */ 3501 if (cnt_in_sd) { 3502#ifdef SCTP_LOG_CLOSING 3503 sctp_log_closing(inp, NULL, 2); 3504#endif 3505 inp->sctp_socket = NULL; 3506 SCTP_INP_WUNLOCK(inp); 3507 SCTP_ASOC_CREATE_UNLOCK(inp); 3508 SCTP_INP_INFO_WUNLOCK(); 3509 return; 3510 } 3511 } 3512 inp->sctp_socket = NULL; 3513 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3514 SCTP_PCB_FLAGS_UNBOUND) { 3515 /* 3516 * ok, this guy has been bound. It's port is somewhere in 3517 * the SCTP_BASE_INFO(hash table). Remove it! 3518 */ 3519 LIST_REMOVE(inp, sctp_hash); 3520 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3521 } 3522 /* 3523 * If there is a timer running to kill us, forget it, since it may 3524 * have a contest on the INP lock.. which would cause us to die ... 3525 */ 3526 cnt = 0; 3527 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3528 SCTP_TCB_LOCK(asoc); 3529 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3530 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3531 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3532 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3533 } 3534 cnt++; 3535 SCTP_TCB_UNLOCK(asoc); 3536 continue; 3537 } 3538 /* Free associations that are NOT killing us */ 3539 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3540 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3541 struct mbuf *op_err; 3542 3543 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3544 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3545 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3546 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3547 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3548 cnt++; 3549 SCTP_TCB_UNLOCK(asoc); 3550 continue; 3551 } 3552 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3553 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3554 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3555 } 3556 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3557 cnt++; 3558 } 3559 } 3560 if (cnt) { 3561 /* Ok we have someone out there that will kill us */ 3562 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3563#ifdef SCTP_LOG_CLOSING 3564 sctp_log_closing(inp, NULL, 3); 3565#endif 3566 SCTP_INP_WUNLOCK(inp); 3567 SCTP_ASOC_CREATE_UNLOCK(inp); 3568 SCTP_INP_INFO_WUNLOCK(); 3569 return; 3570 } 3571 if (SCTP_INP_LOCK_CONTENDED(inp)) 3572 being_refed++; 3573 if (SCTP_INP_READ_CONTENDED(inp)) 3574 being_refed++; 3575 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3576 being_refed++; 3577 3578 if ((inp->refcount) || 3579 (being_refed) || 3580 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3581 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3582#ifdef SCTP_LOG_CLOSING 3583 sctp_log_closing(inp, NULL, 4); 3584#endif 3585 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3586 SCTP_INP_WUNLOCK(inp); 3587 SCTP_ASOC_CREATE_UNLOCK(inp); 3588 SCTP_INP_INFO_WUNLOCK(); 3589 return; 3590 } 3591 inp->sctp_ep.signature_change.type = 0; 3592 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3593 /* 3594 * Remove it from the list .. last thing we need a lock for. 3595 */ 3596 LIST_REMOVE(inp, sctp_list); 3597 SCTP_INP_WUNLOCK(inp); 3598 SCTP_ASOC_CREATE_UNLOCK(inp); 3599 SCTP_INP_INFO_WUNLOCK(); 3600 /* 3601 * Now we release all locks. Since this INP cannot be found anymore 3602 * except possibly by the kill timer that might be running. We call 3603 * the drain function here. It should hit the case were it sees the 3604 * ACTIVE flag cleared and exit out freeing us to proceed and 3605 * destroy everything. 3606 */ 3607 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3608 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3609 } else { 3610 /* Probably un-needed */ 3611 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3612 } 3613 3614#ifdef SCTP_LOG_CLOSING 3615 sctp_log_closing(inp, NULL, 5); 3616#endif 3617 3618 3619 if ((inp->sctp_asocidhash) != NULL) { 3620 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3621 inp->sctp_asocidhash = NULL; 3622 } 3623 /* sa_ignore FREED_MEMORY */ 3624 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3625 /* Its only abandoned if it had data left */ 3626 if (sq->length) 3627 SCTP_STAT_INCR(sctps_left_abandon); 3628 3629 TAILQ_REMOVE(&inp->read_queue, sq, next); 3630 sctp_free_remote_addr(sq->whoFrom); 3631 if (so) 3632 so->so_rcv.sb_cc -= sq->length; 3633 if (sq->data) { 3634 sctp_m_freem(sq->data); 3635 sq->data = NULL; 3636 } 3637 /* 3638 * no need to free the net count, since at this point all 3639 * assoc's are gone. 3640 */ 3641 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3642 SCTP_DECR_READQ_COUNT(); 3643 } 3644 /* Now the sctp_pcb things */ 3645 /* 3646 * free each asoc if it is not already closed/free. we can't use the 3647 * macro here since le_next will get freed as part of the 3648 * sctp_free_assoc() call. 3649 */ 3650 if (so) { 3651#ifdef IPSEC 3652 ipsec_delete_pcbpolicy(ip_pcb); 3653#endif /* IPSEC */ 3654 3655 /* Unlocks not needed since the socket is gone now */ 3656 } 3657 if (ip_pcb->inp_options) { 3658 (void)sctp_m_free(ip_pcb->inp_options); 3659 ip_pcb->inp_options = 0; 3660 } 3661#ifdef INET6 3662 if (ip_pcb->inp_vflag & INP_IPV6) { 3663 struct in6pcb *in6p; 3664 3665 in6p = (struct in6pcb *)inp; 3666 ip6_freepcbopts(in6p->in6p_outputopts); 3667 } 3668#endif /* INET6 */ 3669 ip_pcb->inp_vflag = 0; 3670 /* free up authentication fields */ 3671 if (inp->sctp_ep.local_auth_chunks != NULL) 3672 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3673 if (inp->sctp_ep.local_hmacs != NULL) 3674 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3675 3676 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3677 LIST_REMOVE(shared_key, next); 3678 sctp_free_sharedkey(shared_key); 3679 /* sa_ignore FREED_MEMORY */ 3680 } 3681 3682 /* 3683 * if we have an address list the following will free the list of 3684 * ifaddr's that are set into this ep. Again macro limitations here, 3685 * since the LIST_FOREACH could be a bad idea. 3686 */ 3687 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3688 sctp_remove_laddr(laddr); 3689 } 3690 3691#ifdef SCTP_TRACK_FREED_ASOCS 3692 /* TEMP CODE */ 3693 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3694 LIST_REMOVE(asoc, sctp_tcblist); 3695 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3696 SCTP_DECR_ASOC_COUNT(); 3697 } 3698 /* *** END TEMP CODE *** */ 3699#endif 3700 /* Now lets see about freeing the EP hash table. */ 3701 if (inp->sctp_tcbhash != NULL) { 3702 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3703 inp->sctp_tcbhash = NULL; 3704 } 3705 /* Now we must put the ep memory back into the zone pool */ 3706 crfree(inp->ip_inp.inp.inp_cred); 3707 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3708 SCTP_INP_LOCK_DESTROY(inp); 3709 SCTP_INP_READ_DESTROY(inp); 3710 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3711 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3712 SCTP_DECR_EP_COUNT(); 3713} 3714 3715 3716struct sctp_nets * 3717sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3718{ 3719 struct sctp_nets *net; 3720 3721 /* locate the address */ 3722 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3723 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3724 return (net); 3725 } 3726 return (NULL); 3727} 3728 3729 3730int 3731sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3732{ 3733 struct sctp_ifa *sctp_ifa; 3734 3735 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3736 if (sctp_ifa) { 3737 return (1); 3738 } else { 3739 return (0); 3740 } 3741} 3742 3743/* 3744 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3745 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3746 * stats of stuff. 3747 */ 3748int 3749sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3750 struct sctp_nets **netp, int set_scope, int from) 3751{ 3752 /* 3753 * The following is redundant to the same lines in the 3754 * sctp_aloc_assoc() but is needed since others call the add address 3755 * function 3756 */ 3757 struct sctp_nets *net, *netfirst; 3758 int addr_inscope; 3759 3760 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3761 from); 3762 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3763 3764 netfirst = sctp_findnet(stcb, newaddr); 3765 if (netfirst) { 3766 /* 3767 * Lie and return ok, we don't want to make the association 3768 * go away for this behavior. It will happen in the TCP 3769 * model in a connected socket. It does not reach the hash 3770 * table until after the association is built so it can't be 3771 * found. Mark as reachable, since the initial creation will 3772 * have been cleared and the NOT_IN_ASSOC flag will have 3773 * been added... and we don't want to end up removing it 3774 * back out. 3775 */ 3776 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3777 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3778 SCTP_ADDR_UNCONFIRMED); 3779 } else { 3780 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3781 } 3782 3783 return (0); 3784 } 3785 addr_inscope = 1; 3786 switch (newaddr->sa_family) { 3787#ifdef INET 3788 case AF_INET: 3789 { 3790 struct sockaddr_in *sin; 3791 3792 sin = (struct sockaddr_in *)newaddr; 3793 if (sin->sin_addr.s_addr == 0) { 3794 /* Invalid address */ 3795 return (-1); 3796 } 3797 /* zero out the bzero area */ 3798 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3799 3800 /* assure len is set */ 3801 sin->sin_len = sizeof(struct sockaddr_in); 3802 if (set_scope) { 3803#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3804 stcb->asoc.scope.ipv4_local_scope = 1; 3805#else 3806 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3807 stcb->asoc.scope.ipv4_local_scope = 1; 3808 } 3809#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3810 } else { 3811 /* Validate the address is in scope */ 3812 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3813 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3814 addr_inscope = 0; 3815 } 3816 } 3817 break; 3818 } 3819#endif 3820#ifdef INET6 3821 case AF_INET6: 3822 { 3823 struct sockaddr_in6 *sin6; 3824 3825 sin6 = (struct sockaddr_in6 *)newaddr; 3826 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3827 /* Invalid address */ 3828 return (-1); 3829 } 3830 /* assure len is set */ 3831 sin6->sin6_len = sizeof(struct sockaddr_in6); 3832 if (set_scope) { 3833 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3834 stcb->asoc.scope.loopback_scope = 1; 3835 stcb->asoc.scope.local_scope = 0; 3836 stcb->asoc.scope.ipv4_local_scope = 1; 3837 stcb->asoc.scope.site_scope = 1; 3838 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3839 /* 3840 * If the new destination is a 3841 * LINK_LOCAL we must have common 3842 * site scope. Don't set the local 3843 * scope since we may not share all 3844 * links, only loopback can do this. 3845 * Links on the local network would 3846 * also be on our private network 3847 * for v4 too. 3848 */ 3849 stcb->asoc.scope.ipv4_local_scope = 1; 3850 stcb->asoc.scope.site_scope = 1; 3851 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3852 /* 3853 * If the new destination is 3854 * SITE_LOCAL then we must have site 3855 * scope in common. 3856 */ 3857 stcb->asoc.scope.site_scope = 1; 3858 } 3859 } else { 3860 /* Validate the address is in scope */ 3861 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3862 (stcb->asoc.scope.loopback_scope == 0)) { 3863 addr_inscope = 0; 3864 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3865 (stcb->asoc.scope.local_scope == 0)) { 3866 addr_inscope = 0; 3867 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3868 (stcb->asoc.scope.site_scope == 0)) { 3869 addr_inscope = 0; 3870 } 3871 } 3872 break; 3873 } 3874#endif 3875 default: 3876 /* not supported family type */ 3877 return (-1); 3878 } 3879 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3880 if (net == NULL) { 3881 return (-1); 3882 } 3883 SCTP_INCR_RADDR_COUNT(); 3884 bzero(net, sizeof(struct sctp_nets)); 3885 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3886 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3887 switch (newaddr->sa_family) { 3888#ifdef INET 3889 case AF_INET: 3890 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3891 break; 3892#endif 3893#ifdef INET6 3894 case AF_INET6: 3895 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3896 break; 3897#endif 3898 default: 3899 break; 3900 } 3901 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3902 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3903 stcb->asoc.scope.loopback_scope = 1; 3904 stcb->asoc.scope.ipv4_local_scope = 1; 3905 stcb->asoc.scope.local_scope = 0; 3906 stcb->asoc.scope.site_scope = 1; 3907 addr_inscope = 1; 3908 } 3909 net->failure_threshold = stcb->asoc.def_net_failure; 3910 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3911 if (addr_inscope == 0) { 3912 net->dest_state = (SCTP_ADDR_REACHABLE | 3913 SCTP_ADDR_OUT_OF_SCOPE); 3914 } else { 3915 if (from == SCTP_ADDR_IS_CONFIRMED) 3916 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3917 net->dest_state = SCTP_ADDR_REACHABLE; 3918 else 3919 net->dest_state = SCTP_ADDR_REACHABLE | 3920 SCTP_ADDR_UNCONFIRMED; 3921 } 3922 /* 3923 * We set this to 0, the timer code knows that this means its an 3924 * initial value 3925 */ 3926 net->rto_needed = 1; 3927 net->RTO = 0; 3928 net->RTO_measured = 0; 3929 stcb->asoc.numnets++; 3930 net->ref_count = 1; 3931 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3932 net->port = stcb->asoc.port; 3933 net->dscp = stcb->asoc.default_dscp; 3934#ifdef INET6 3935 net->flowlabel = stcb->asoc.default_flowlabel; 3936#endif 3937 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3938 net->dest_state |= SCTP_ADDR_NOHB; 3939 } else { 3940 net->dest_state &= ~SCTP_ADDR_NOHB; 3941 } 3942 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3943 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3944 } else { 3945 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3946 } 3947 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3948 /* Init the timer structure */ 3949 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3950 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3951 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3952 3953 /* Now generate a route for this guy */ 3954#ifdef INET6 3955 /* KAME hack: embed scopeid */ 3956 if (newaddr->sa_family == AF_INET6) { 3957 struct sockaddr_in6 *sin6; 3958 3959 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3960 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3961 sin6->sin6_scope_id = 0; 3962 } 3963#endif 3964 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3965 3966 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3967 /* Get source address */ 3968 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3969 stcb, 3970 (sctp_route_t *) & net->ro, 3971 net, 3972 0, 3973 stcb->asoc.vrf_id); 3974 if (net->ro._s_addr != NULL) { 3975 net->src_addr_selected = 1; 3976 /* Now get the interface MTU */ 3977 if (net->ro._s_addr->ifn_p != NULL) { 3978 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3979 } 3980 } else { 3981 net->src_addr_selected = 0; 3982 } 3983 if (net->mtu > 0) { 3984 uint32_t rmtu; 3985 3986 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3987 if (rmtu == 0) { 3988 /* 3989 * Start things off to match mtu of 3990 * interface please. 3991 */ 3992 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3993 net->ro.ro_rt, net->mtu); 3994 } else { 3995 /* 3996 * we take the route mtu over the interface, 3997 * since the route may be leading out the 3998 * loopback, or a different interface. 3999 */ 4000 net->mtu = rmtu; 4001 } 4002 } 4003 } else { 4004 net->src_addr_selected = 0; 4005 } 4006 if (net->mtu == 0) { 4007 switch (newaddr->sa_family) { 4008#ifdef INET 4009 case AF_INET: 4010 net->mtu = SCTP_DEFAULT_MTU; 4011 break; 4012#endif 4013#ifdef INET6 4014 case AF_INET6: 4015 net->mtu = 1280; 4016 break; 4017#endif 4018 default: 4019 break; 4020 } 4021 } 4022#if defined(INET) || defined(INET6) 4023 if (net->port) { 4024 net->mtu -= (uint32_t) sizeof(struct udphdr); 4025 } 4026#endif 4027 if (from == SCTP_ALLOC_ASOC) { 4028 stcb->asoc.smallest_mtu = net->mtu; 4029 } 4030 if (stcb->asoc.smallest_mtu > net->mtu) { 4031 stcb->asoc.smallest_mtu = net->mtu; 4032 } 4033#ifdef INET6 4034 if (newaddr->sa_family == AF_INET6) { 4035 struct sockaddr_in6 *sin6; 4036 4037 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4038 (void)sa6_recoverscope(sin6); 4039 } 4040#endif 4041 4042 /* JRS - Use the congestion control given in the CC module */ 4043 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4044 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4045 4046 /* 4047 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4048 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4049 */ 4050 net->find_pseudo_cumack = 1; 4051 net->find_rtx_pseudo_cumack = 1; 4052 /* Choose an initial flowid. */ 4053 net->flowid = stcb->asoc.my_vtag ^ 4054 ntohs(stcb->rport) ^ 4055 ntohs(stcb->sctp_ep->sctp_lport); 4056 net->flowtype = M_HASHTYPE_OPAQUE; 4057 if (netp) { 4058 *netp = net; 4059 } 4060 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4061 if (net->ro.ro_rt == NULL) { 4062 /* Since we have no route put it at the back */ 4063 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4064 } else if (netfirst == NULL) { 4065 /* We are the first one in the pool. */ 4066 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4067 } else if (netfirst->ro.ro_rt == NULL) { 4068 /* 4069 * First one has NO route. Place this one ahead of the first 4070 * one. 4071 */ 4072 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4073 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4074 /* 4075 * This one has a different interface than the one at the 4076 * top of the list. Place it ahead. 4077 */ 4078 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4079 } else { 4080 /* 4081 * Ok we have the same interface as the first one. Move 4082 * forward until we find either a) one with a NULL route... 4083 * insert ahead of that b) one with a different ifp.. insert 4084 * after that. c) end of the list.. insert at the tail. 4085 */ 4086 struct sctp_nets *netlook; 4087 4088 do { 4089 netlook = TAILQ_NEXT(netfirst, sctp_next); 4090 if (netlook == NULL) { 4091 /* End of the list */ 4092 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4093 break; 4094 } else if (netlook->ro.ro_rt == NULL) { 4095 /* next one has NO route */ 4096 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4097 break; 4098 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4099 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4100 net, sctp_next); 4101 break; 4102 } 4103 /* Shift forward */ 4104 netfirst = netlook; 4105 } while (netlook != NULL); 4106 } 4107 4108 /* got to have a primary set */ 4109 if (stcb->asoc.primary_destination == 0) { 4110 stcb->asoc.primary_destination = net; 4111 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4112 (net->ro.ro_rt) && 4113 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4114 /* No route to current primary adopt new primary */ 4115 stcb->asoc.primary_destination = net; 4116 } 4117 /* Validate primary is first */ 4118 net = TAILQ_FIRST(&stcb->asoc.nets); 4119 if ((net != stcb->asoc.primary_destination) && 4120 (stcb->asoc.primary_destination)) { 4121 /* 4122 * first one on the list is NOT the primary sctp_cmpaddr() 4123 * is much more efficient if the primary is the first on the 4124 * list, make it so. 4125 */ 4126 TAILQ_REMOVE(&stcb->asoc.nets, 4127 stcb->asoc.primary_destination, sctp_next); 4128 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4129 stcb->asoc.primary_destination, sctp_next); 4130 } 4131 return (0); 4132} 4133 4134 4135static uint32_t 4136sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4137{ 4138 uint32_t id; 4139 struct sctpasochead *head; 4140 struct sctp_tcb *lstcb; 4141 4142 SCTP_INP_WLOCK(inp); 4143try_again: 4144 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4145 /* TSNH */ 4146 SCTP_INP_WUNLOCK(inp); 4147 return (0); 4148 } 4149 /* 4150 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4151 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4152 */ 4153 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4154 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4155 } 4156 id = inp->sctp_associd_counter; 4157 inp->sctp_associd_counter++; 4158 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4159 if (lstcb) { 4160 goto try_again; 4161 } 4162 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4163 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4164 stcb->asoc.in_asocid_hash = 1; 4165 SCTP_INP_WUNLOCK(inp); 4166 return id; 4167} 4168 4169/* 4170 * allocate an association and add it to the endpoint. The caller must be 4171 * careful to add all additional addresses once they are know right away or 4172 * else the assoc will be may experience a blackout scenario. 4173 */ 4174struct sctp_tcb * 4175sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4176 int *error, uint32_t override_tag, uint32_t vrf_id, 4177 struct thread *p 4178) 4179{ 4180 /* note the p argument is only valid in unbound sockets */ 4181 4182 struct sctp_tcb *stcb; 4183 struct sctp_association *asoc; 4184 struct sctpasochead *head; 4185 uint16_t rport; 4186 int err; 4187 4188 /* 4189 * Assumption made here: Caller has done a 4190 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4191 * address does not exist already. 4192 */ 4193 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4194 /* Hit max assoc, sorry no more */ 4195 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4196 *error = ENOBUFS; 4197 return (NULL); 4198 } 4199 if (firstaddr == NULL) { 4200 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4201 *error = EINVAL; 4202 return (NULL); 4203 } 4204 SCTP_INP_RLOCK(inp); 4205 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4206 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4207 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4208 /* 4209 * If its in the TCP pool, its NOT allowed to create an 4210 * association. The parent listener needs to call 4211 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4212 * off, or connected one does this.. its an error. 4213 */ 4214 SCTP_INP_RUNLOCK(inp); 4215 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4216 *error = EINVAL; 4217 return (NULL); 4218 } 4219 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4220 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4221 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4222 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4223 SCTP_INP_RUNLOCK(inp); 4224 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4225 *error = EINVAL; 4226 return (NULL); 4227 } 4228 } 4229 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4230#ifdef SCTP_DEBUG 4231 if (firstaddr) { 4232 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4233 switch (firstaddr->sa_family) { 4234#ifdef INET 4235 case AF_INET: 4236 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4237 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4238 break; 4239#endif 4240#ifdef INET6 4241 case AF_INET6: 4242 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4243 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4244 break; 4245#endif 4246 default: 4247 break; 4248 } 4249 } else { 4250 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4251 } 4252#endif /* SCTP_DEBUG */ 4253 switch (firstaddr->sa_family) { 4254#ifdef INET 4255 case AF_INET: 4256 { 4257 struct sockaddr_in *sin; 4258 4259 sin = (struct sockaddr_in *)firstaddr; 4260 if ((ntohs(sin->sin_port) == 0) || 4261 (sin->sin_addr.s_addr == INADDR_ANY) || 4262 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4263 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4264 /* Invalid address */ 4265 SCTP_INP_RUNLOCK(inp); 4266 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4267 *error = EINVAL; 4268 return (NULL); 4269 } 4270 rport = sin->sin_port; 4271 break; 4272 } 4273#endif 4274#ifdef INET6 4275 case AF_INET6: 4276 { 4277 struct sockaddr_in6 *sin6; 4278 4279 sin6 = (struct sockaddr_in6 *)firstaddr; 4280 if ((ntohs(sin6->sin6_port) == 0) || 4281 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4282 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4283 /* Invalid address */ 4284 SCTP_INP_RUNLOCK(inp); 4285 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4286 *error = EINVAL; 4287 return (NULL); 4288 } 4289 rport = sin6->sin6_port; 4290 break; 4291 } 4292#endif 4293 default: 4294 /* not supported family type */ 4295 SCTP_INP_RUNLOCK(inp); 4296 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4297 *error = EINVAL; 4298 return (NULL); 4299 } 4300 SCTP_INP_RUNLOCK(inp); 4301 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4302 /* 4303 * If you have not performed a bind, then we need to do the 4304 * ephemeral bind for you. 4305 */ 4306 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4307 (struct sockaddr *)NULL, 4308 (struct sctp_ifa *)NULL, 4309 p 4310 ))) { 4311 /* bind error, probably perm */ 4312 *error = err; 4313 return (NULL); 4314 } 4315 } 4316 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4317 if (stcb == NULL) { 4318 /* out of memory? */ 4319 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4320 *error = ENOMEM; 4321 return (NULL); 4322 } 4323 SCTP_INCR_ASOC_COUNT(); 4324 4325 bzero(stcb, sizeof(*stcb)); 4326 asoc = &stcb->asoc; 4327 4328 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4329 SCTP_TCB_LOCK_INIT(stcb); 4330 SCTP_TCB_SEND_LOCK_INIT(stcb); 4331 stcb->rport = rport; 4332 /* setup back pointer's */ 4333 stcb->sctp_ep = inp; 4334 stcb->sctp_socket = inp->sctp_socket; 4335 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4336 /* failed */ 4337 SCTP_TCB_LOCK_DESTROY(stcb); 4338 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4339 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4340 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4341 SCTP_DECR_ASOC_COUNT(); 4342 *error = err; 4343 return (NULL); 4344 } 4345 /* and the port */ 4346 SCTP_INP_INFO_WLOCK(); 4347 SCTP_INP_WLOCK(inp); 4348 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4349 /* inpcb freed while alloc going on */ 4350 SCTP_TCB_LOCK_DESTROY(stcb); 4351 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4352 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4353 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4354 SCTP_INP_WUNLOCK(inp); 4355 SCTP_INP_INFO_WUNLOCK(); 4356 SCTP_DECR_ASOC_COUNT(); 4357 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4358 *error = EINVAL; 4359 return (NULL); 4360 } 4361 SCTP_TCB_LOCK(stcb); 4362 4363 /* now that my_vtag is set, add it to the hash */ 4364 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4365 /* put it in the bucket in the vtag hash of assoc's for the system */ 4366 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4367 SCTP_INP_INFO_WUNLOCK(); 4368 4369 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4370 /* failure.. memory error? */ 4371 if (asoc->strmout) { 4372 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4373 asoc->strmout = NULL; 4374 } 4375 if (asoc->mapping_array) { 4376 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4377 asoc->mapping_array = NULL; 4378 } 4379 if (asoc->nr_mapping_array) { 4380 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4381 asoc->nr_mapping_array = NULL; 4382 } 4383 SCTP_DECR_ASOC_COUNT(); 4384 SCTP_TCB_UNLOCK(stcb); 4385 SCTP_TCB_LOCK_DESTROY(stcb); 4386 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4387 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4388 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4389 SCTP_INP_WUNLOCK(inp); 4390 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4391 *error = ENOBUFS; 4392 return (NULL); 4393 } 4394 /* Init all the timers */ 4395 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4396 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4397 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4398 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4399 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4400 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4401 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4402 4403 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4404 /* now file the port under the hash as well */ 4405 if (inp->sctp_tcbhash != NULL) { 4406 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4407 inp->sctp_hashmark)]; 4408 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4409 } 4410 SCTP_INP_WUNLOCK(inp); 4411 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4412 return (stcb); 4413} 4414 4415 4416void 4417sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4418{ 4419 struct sctp_association *asoc; 4420 4421 asoc = &stcb->asoc; 4422 asoc->numnets--; 4423 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4424 if (net == asoc->primary_destination) { 4425 /* Reset primary */ 4426 struct sctp_nets *lnet; 4427 4428 lnet = TAILQ_FIRST(&asoc->nets); 4429 /* 4430 * Mobility adaptation Ideally, if deleted destination is 4431 * the primary, it becomes a fast retransmission trigger by 4432 * the subsequent SET PRIMARY. (by micchie) 4433 */ 4434 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4435 SCTP_MOBILITY_BASE) || 4436 sctp_is_mobility_feature_on(stcb->sctp_ep, 4437 SCTP_MOBILITY_FASTHANDOFF)) { 4438 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4439 if (asoc->deleted_primary != NULL) { 4440 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4441 goto out; 4442 } 4443 asoc->deleted_primary = net; 4444 atomic_add_int(&net->ref_count, 1); 4445 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4446 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4447 sctp_mobility_feature_on(stcb->sctp_ep, 4448 SCTP_MOBILITY_PRIM_DELETED); 4449 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4450 stcb->sctp_ep, stcb, NULL); 4451 } 4452out: 4453 /* Try to find a confirmed primary */ 4454 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4455 } 4456 if (net == asoc->last_data_chunk_from) { 4457 /* Reset primary */ 4458 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4459 } 4460 if (net == asoc->last_control_chunk_from) { 4461 /* Clear net */ 4462 asoc->last_control_chunk_from = NULL; 4463 } 4464 if (net == stcb->asoc.alternate) { 4465 sctp_free_remote_addr(stcb->asoc.alternate); 4466 stcb->asoc.alternate = NULL; 4467 } 4468 sctp_free_remote_addr(net); 4469} 4470 4471/* 4472 * remove a remote endpoint address from an association, it will fail if the 4473 * address does not exist. 4474 */ 4475int 4476sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4477{ 4478 /* 4479 * Here we need to remove a remote address. This is quite simple, we 4480 * first find it in the list of address for the association 4481 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4482 * on that item. Note we do not allow it to be removed if there are 4483 * no other addresses. 4484 */ 4485 struct sctp_association *asoc; 4486 struct sctp_nets *net, *nnet; 4487 4488 asoc = &stcb->asoc; 4489 4490 /* locate the address */ 4491 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4492 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4493 continue; 4494 } 4495 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4496 remaddr)) { 4497 /* we found the guy */ 4498 if (asoc->numnets < 2) { 4499 /* Must have at LEAST two remote addresses */ 4500 return (-1); 4501 } else { 4502 sctp_remove_net(stcb, net); 4503 return (0); 4504 } 4505 } 4506 } 4507 /* not found. */ 4508 return (-2); 4509} 4510 4511void 4512sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4513{ 4514 struct sctpvtaghead *chain; 4515 struct sctp_tagblock *twait_block; 4516 int found = 0; 4517 int i; 4518 4519 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4520 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4521 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4522 if ((twait_block->vtag_block[i].v_tag == tag) && 4523 (twait_block->vtag_block[i].lport == lport) && 4524 (twait_block->vtag_block[i].rport == rport)) { 4525 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4526 twait_block->vtag_block[i].v_tag = 0; 4527 twait_block->vtag_block[i].lport = 0; 4528 twait_block->vtag_block[i].rport = 0; 4529 found = 1; 4530 break; 4531 } 4532 } 4533 if (found) 4534 break; 4535 } 4536} 4537 4538int 4539sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4540{ 4541 struct sctpvtaghead *chain; 4542 struct sctp_tagblock *twait_block; 4543 int found = 0; 4544 int i; 4545 4546 SCTP_INP_INFO_WLOCK(); 4547 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4548 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4549 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4550 if ((twait_block->vtag_block[i].v_tag == tag) && 4551 (twait_block->vtag_block[i].lport == lport) && 4552 (twait_block->vtag_block[i].rport == rport)) { 4553 found = 1; 4554 break; 4555 } 4556 } 4557 if (found) 4558 break; 4559 } 4560 SCTP_INP_INFO_WUNLOCK(); 4561 return (found); 4562} 4563 4564 4565void 4566sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4567{ 4568 struct sctpvtaghead *chain; 4569 struct sctp_tagblock *twait_block; 4570 struct timeval now; 4571 int set, i; 4572 4573 if (time == 0) { 4574 /* Its disabled */ 4575 return; 4576 } 4577 (void)SCTP_GETTIME_TIMEVAL(&now); 4578 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4579 set = 0; 4580 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4581 /* Block(s) present, lets find space, and expire on the fly */ 4582 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4583 if ((twait_block->vtag_block[i].v_tag == 0) && 4584 !set) { 4585 twait_block->vtag_block[i].tv_sec_at_expire = 4586 now.tv_sec + time; 4587 twait_block->vtag_block[i].v_tag = tag; 4588 twait_block->vtag_block[i].lport = lport; 4589 twait_block->vtag_block[i].rport = rport; 4590 set = 1; 4591 } else if ((twait_block->vtag_block[i].v_tag) && 4592 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4593 /* Audit expires this guy */ 4594 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4595 twait_block->vtag_block[i].v_tag = 0; 4596 twait_block->vtag_block[i].lport = 0; 4597 twait_block->vtag_block[i].rport = 0; 4598 if (set == 0) { 4599 /* Reuse it for my new tag */ 4600 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4601 twait_block->vtag_block[i].v_tag = tag; 4602 twait_block->vtag_block[i].lport = lport; 4603 twait_block->vtag_block[i].rport = rport; 4604 set = 1; 4605 } 4606 } 4607 } 4608 if (set) { 4609 /* 4610 * We only do up to the block where we can place our 4611 * tag for audits 4612 */ 4613 break; 4614 } 4615 } 4616 /* Need to add a new block to chain */ 4617 if (!set) { 4618 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4619 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4620 if (twait_block == NULL) { 4621#ifdef INVARIANTS 4622 panic("Can not alloc tagblock"); 4623#endif 4624 return; 4625 } 4626 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4627 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4628 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4629 twait_block->vtag_block[0].v_tag = tag; 4630 twait_block->vtag_block[0].lport = lport; 4631 twait_block->vtag_block[0].rport = rport; 4632 } 4633} 4634 4635 4636 4637/*- 4638 * Free the association after un-hashing the remote port. This 4639 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4640 * expect that the input to this function IS a locked TCB. 4641 * It will return 0, if it did NOT destroy the association (instead 4642 * it unlocks it. It will return NON-zero if it either destroyed the 4643 * association OR the association is already destroyed. 4644 */ 4645int 4646sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4647{ 4648 int i; 4649 struct sctp_association *asoc; 4650 struct sctp_nets *net, *nnet; 4651 struct sctp_laddr *laddr, *naddr; 4652 struct sctp_tmit_chunk *chk, *nchk; 4653 struct sctp_asconf_addr *aparam, *naparam; 4654 struct sctp_asconf_ack *aack, *naack; 4655 struct sctp_stream_reset_list *strrst, *nstrrst; 4656 struct sctp_queued_to_read *sq, *nsq; 4657 struct sctp_stream_queue_pending *sp, *nsp; 4658 sctp_sharedkey_t *shared_key, *nshared_key; 4659 struct socket *so; 4660 4661 /* first, lets purge the entry from the hash table. */ 4662 4663#ifdef SCTP_LOG_CLOSING 4664 sctp_log_closing(inp, stcb, 6); 4665#endif 4666 if (stcb->asoc.state == 0) { 4667#ifdef SCTP_LOG_CLOSING 4668 sctp_log_closing(inp, NULL, 7); 4669#endif 4670 /* there is no asoc, really TSNH :-0 */ 4671 return (1); 4672 } 4673 if (stcb->asoc.alternate) { 4674 sctp_free_remote_addr(stcb->asoc.alternate); 4675 stcb->asoc.alternate = NULL; 4676 } 4677 /* TEMP CODE */ 4678 if (stcb->freed_from_where == 0) { 4679 /* Only record the first place free happened from */ 4680 stcb->freed_from_where = from_location; 4681 } 4682 /* TEMP CODE */ 4683 4684 asoc = &stcb->asoc; 4685 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4686 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4687 /* nothing around */ 4688 so = NULL; 4689 else 4690 so = inp->sctp_socket; 4691 4692 /* 4693 * We used timer based freeing if a reader or writer is in the way. 4694 * So we first check if we are actually being called from a timer, 4695 * if so we abort early if a reader or writer is still in the way. 4696 */ 4697 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4698 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4699 /* 4700 * is it the timer driving us? if so are the reader/writers 4701 * gone? 4702 */ 4703 if (stcb->asoc.refcnt) { 4704 /* nope, reader or writer in the way */ 4705 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4706 /* no asoc destroyed */ 4707 SCTP_TCB_UNLOCK(stcb); 4708#ifdef SCTP_LOG_CLOSING 4709 sctp_log_closing(inp, stcb, 8); 4710#endif 4711 return (0); 4712 } 4713 } 4714 /* now clean up any other timers */ 4715 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4716 asoc->dack_timer.self = NULL; 4717 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4718 /*- 4719 * For stream reset we don't blast this unless 4720 * it is a str-reset timer, it might be the 4721 * free-asoc timer which we DON'T want to 4722 * disturb. 4723 */ 4724 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4725 asoc->strreset_timer.self = NULL; 4726 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4727 asoc->asconf_timer.self = NULL; 4728 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4729 asoc->autoclose_timer.self = NULL; 4730 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4731 asoc->shut_guard_timer.self = NULL; 4732 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4733 asoc->delayed_event_timer.self = NULL; 4734 /* Mobility adaptation */ 4735 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4736 asoc->delete_prim_timer.self = NULL; 4737 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4738 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4739 net->rxt_timer.self = NULL; 4740 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4741 net->pmtu_timer.self = NULL; 4742 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4743 net->hb_timer.self = NULL; 4744 } 4745 /* Now the read queue needs to be cleaned up (only once) */ 4746 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4747 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4748 SCTP_INP_READ_LOCK(inp); 4749 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4750 if (sq->stcb == stcb) { 4751 sq->do_not_ref_stcb = 1; 4752 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4753 /* 4754 * If there is no end, there never will be 4755 * now. 4756 */ 4757 if (sq->end_added == 0) { 4758 /* Held for PD-API clear that. */ 4759 sq->pdapi_aborted = 1; 4760 sq->held_length = 0; 4761 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4762 /* 4763 * Need to add a PD-API 4764 * aborted indication. 4765 * Setting the control_pdapi 4766 * assures that it will be 4767 * added right after this 4768 * msg. 4769 */ 4770 uint32_t strseq; 4771 4772 stcb->asoc.control_pdapi = sq; 4773 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4774 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4775 stcb, 4776 SCTP_PARTIAL_DELIVERY_ABORTED, 4777 (void *)&strseq, 4778 SCTP_SO_LOCKED); 4779 stcb->asoc.control_pdapi = NULL; 4780 } 4781 } 4782 /* Add an end to wake them */ 4783 sq->end_added = 1; 4784 } 4785 } 4786 SCTP_INP_READ_UNLOCK(inp); 4787 if (stcb->block_entry) { 4788 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4789 stcb->block_entry->error = ECONNRESET; 4790 stcb->block_entry = NULL; 4791 } 4792 } 4793 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4794 /* 4795 * Someone holds a reference OR the socket is unaccepted 4796 * yet. 4797 */ 4798 if ((stcb->asoc.refcnt) || 4799 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4800 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4801 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4802 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4803 } 4804 SCTP_TCB_UNLOCK(stcb); 4805 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4806 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4807 /* nothing around */ 4808 so = NULL; 4809 if (so) { 4810 /* Wake any reader/writers */ 4811 sctp_sorwakeup(inp, so); 4812 sctp_sowwakeup(inp, so); 4813 } 4814#ifdef SCTP_LOG_CLOSING 4815 sctp_log_closing(inp, stcb, 9); 4816#endif 4817 /* no asoc destroyed */ 4818 return (0); 4819 } 4820#ifdef SCTP_LOG_CLOSING 4821 sctp_log_closing(inp, stcb, 10); 4822#endif 4823 /* 4824 * When I reach here, no others want to kill the assoc yet.. and I 4825 * own the lock. Now its possible an abort comes in when I do the 4826 * lock exchange below to grab all the locks to do the final take 4827 * out. to prevent this we increment the count, which will start a 4828 * timer and blow out above thus assuring us that we hold exclusive 4829 * killing of the asoc. Note that after getting back the TCB lock we 4830 * will go ahead and increment the counter back up and stop any 4831 * timer a passing stranger may have started :-S 4832 */ 4833 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4834 atomic_add_int(&stcb->asoc.refcnt, 1); 4835 4836 SCTP_TCB_UNLOCK(stcb); 4837 SCTP_INP_INFO_WLOCK(); 4838 SCTP_INP_WLOCK(inp); 4839 SCTP_TCB_LOCK(stcb); 4840 } 4841 /* Double check the GONE flag */ 4842 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4843 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4844 /* nothing around */ 4845 so = NULL; 4846 4847 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4848 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4849 /* 4850 * For TCP type we need special handling when we are 4851 * connected. We also include the peel'ed off ones to. 4852 */ 4853 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4854 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4855 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4856 if (so) { 4857 SOCK_LOCK(so); 4858 if (so->so_rcv.sb_cc == 0) { 4859 so->so_state &= ~(SS_ISCONNECTING | 4860 SS_ISDISCONNECTING | 4861 SS_ISCONFIRMING | 4862 SS_ISCONNECTED); 4863 } 4864 socantrcvmore_locked(so); 4865 sctp_sowwakeup(inp, so); 4866 sctp_sorwakeup(inp, so); 4867 SCTP_SOWAKEUP(so); 4868 } 4869 } 4870 } 4871 /* 4872 * Make it invalid too, that way if its about to run it will abort 4873 * and return. 4874 */ 4875 /* re-increment the lock */ 4876 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4877 atomic_add_int(&stcb->asoc.refcnt, -1); 4878 } 4879 if (stcb->asoc.refcnt) { 4880 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4881 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4882 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4883 SCTP_INP_INFO_WUNLOCK(); 4884 SCTP_INP_WUNLOCK(inp); 4885 } 4886 SCTP_TCB_UNLOCK(stcb); 4887 return (0); 4888 } 4889 asoc->state = 0; 4890 if (inp->sctp_tcbhash) { 4891 LIST_REMOVE(stcb, sctp_tcbhash); 4892 } 4893 if (stcb->asoc.in_asocid_hash) { 4894 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4895 } 4896 /* Now lets remove it from the list of ALL associations in the EP */ 4897 LIST_REMOVE(stcb, sctp_tcblist); 4898 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4899 SCTP_INP_INCR_REF(inp); 4900 SCTP_INP_WUNLOCK(inp); 4901 } 4902 /* pull from vtag hash */ 4903 LIST_REMOVE(stcb, sctp_asocs); 4904 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4905 inp->sctp_lport, stcb->rport); 4906 4907 /* 4908 * Now restop the timers to be sure this is paranoia at is finest! 4909 */ 4910 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4911 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4912 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4913 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4914 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4915 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4916 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4917 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4918 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4919 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4920 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4921 } 4922 4923 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4924 /* 4925 * The chunk lists and such SHOULD be empty but we check them just 4926 * in case. 4927 */ 4928 /* anything on the wheel needs to be removed */ 4929 for (i = 0; i < asoc->streamoutcnt; i++) { 4930 struct sctp_stream_out *outs; 4931 4932 outs = &asoc->strmout[i]; 4933 /* now clean up any chunks here */ 4934 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4935 TAILQ_REMOVE(&outs->outqueue, sp, next); 4936 sctp_free_spbufspace(stcb, asoc, sp); 4937 if (sp->data) { 4938 if (so) { 4939 /* Still an open socket - report */ 4940 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4941 0, (void *)sp, SCTP_SO_LOCKED); 4942 } 4943 if (sp->data) { 4944 sctp_m_freem(sp->data); 4945 sp->data = NULL; 4946 sp->tail_mbuf = NULL; 4947 sp->length = 0; 4948 } 4949 } 4950 if (sp->net) { 4951 sctp_free_remote_addr(sp->net); 4952 sp->net = NULL; 4953 } 4954 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4955 } 4956 } 4957 /* sa_ignore FREED_MEMORY */ 4958 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4959 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4960 SCTP_FREE(strrst, SCTP_M_STRESET); 4961 } 4962 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4963 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4964 if (sq->data) { 4965 sctp_m_freem(sq->data); 4966 sq->data = NULL; 4967 } 4968 sctp_free_remote_addr(sq->whoFrom); 4969 sq->whoFrom = NULL; 4970 sq->stcb = NULL; 4971 /* Free the ctl entry */ 4972 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4973 SCTP_DECR_READQ_COUNT(); 4974 /* sa_ignore FREED_MEMORY */ 4975 } 4976 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4977 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4978 if (chk->data) { 4979 sctp_m_freem(chk->data); 4980 chk->data = NULL; 4981 } 4982 if (chk->holds_key_ref) 4983 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4984 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4985 SCTP_DECR_CHK_COUNT(); 4986 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4987 asoc->free_chunk_cnt--; 4988 /* sa_ignore FREED_MEMORY */ 4989 } 4990 /* pending send queue SHOULD be empty */ 4991 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4992 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4993 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4994#ifdef INVARIANTS 4995 } else { 4996 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4997#endif 4998 } 4999 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5000 if (chk->data) { 5001 if (so) { 5002 /* Still a socket? */ 5003 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5004 0, chk, SCTP_SO_LOCKED); 5005 } 5006 if (chk->data) { 5007 sctp_m_freem(chk->data); 5008 chk->data = NULL; 5009 } 5010 } 5011 if (chk->holds_key_ref) 5012 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5013 if (chk->whoTo) { 5014 sctp_free_remote_addr(chk->whoTo); 5015 chk->whoTo = NULL; 5016 } 5017 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5018 SCTP_DECR_CHK_COUNT(); 5019 /* sa_ignore FREED_MEMORY */ 5020 } 5021 /* sent queue SHOULD be empty */ 5022 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5023 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5024 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5025 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5026#ifdef INVARIANTS 5027 } else { 5028 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5029#endif 5030 } 5031 } 5032 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5033 if (chk->data) { 5034 if (so) { 5035 /* Still a socket? */ 5036 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5037 0, chk, SCTP_SO_LOCKED); 5038 } 5039 if (chk->data) { 5040 sctp_m_freem(chk->data); 5041 chk->data = NULL; 5042 } 5043 } 5044 if (chk->holds_key_ref) 5045 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5046 sctp_free_remote_addr(chk->whoTo); 5047 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5048 SCTP_DECR_CHK_COUNT(); 5049 /* sa_ignore FREED_MEMORY */ 5050 } 5051#ifdef INVARIANTS 5052 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5053 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5054 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5055 } 5056 } 5057#endif 5058 /* control queue MAY not be empty */ 5059 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5060 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5061 if (chk->data) { 5062 sctp_m_freem(chk->data); 5063 chk->data = NULL; 5064 } 5065 if (chk->holds_key_ref) 5066 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5067 sctp_free_remote_addr(chk->whoTo); 5068 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5069 SCTP_DECR_CHK_COUNT(); 5070 /* sa_ignore FREED_MEMORY */ 5071 } 5072 /* ASCONF queue MAY not be empty */ 5073 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5074 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5075 if (chk->data) { 5076 sctp_m_freem(chk->data); 5077 chk->data = NULL; 5078 } 5079 if (chk->holds_key_ref) 5080 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5081 sctp_free_remote_addr(chk->whoTo); 5082 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5083 SCTP_DECR_CHK_COUNT(); 5084 /* sa_ignore FREED_MEMORY */ 5085 } 5086 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5087 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5088 if (chk->data) { 5089 sctp_m_freem(chk->data); 5090 chk->data = NULL; 5091 } 5092 if (chk->holds_key_ref) 5093 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5094 sctp_free_remote_addr(chk->whoTo); 5095 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5096 SCTP_DECR_CHK_COUNT(); 5097 /* sa_ignore FREED_MEMORY */ 5098 } 5099 5100 if (asoc->mapping_array) { 5101 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5102 asoc->mapping_array = NULL; 5103 } 5104 if (asoc->nr_mapping_array) { 5105 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5106 asoc->nr_mapping_array = NULL; 5107 } 5108 /* the stream outs */ 5109 if (asoc->strmout) { 5110 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5111 asoc->strmout = NULL; 5112 } 5113 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5114 if (asoc->strmin) { 5115 struct sctp_queued_to_read *ctl, *nctl; 5116 5117 for (i = 0; i < asoc->streamincnt; i++) { 5118 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5119 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5120 sctp_free_remote_addr(ctl->whoFrom); 5121 if (ctl->data) { 5122 sctp_m_freem(ctl->data); 5123 ctl->data = NULL; 5124 } 5125 /* 5126 * We don't free the address here since all 5127 * the net's were freed above. 5128 */ 5129 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5130 SCTP_DECR_READQ_COUNT(); 5131 } 5132 } 5133 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5134 asoc->strmin = NULL; 5135 } 5136 asoc->streamincnt = 0; 5137 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5138#ifdef INVARIANTS 5139 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5140 panic("no net's left alloc'ed, or list points to itself"); 5141 } 5142#endif 5143 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5144 sctp_free_remote_addr(net); 5145 } 5146 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5147 /* sa_ignore FREED_MEMORY */ 5148 sctp_remove_laddr(laddr); 5149 } 5150 5151 /* pending asconf (address) parameters */ 5152 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5153 /* sa_ignore FREED_MEMORY */ 5154 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5155 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5156 } 5157 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5158 /* sa_ignore FREED_MEMORY */ 5159 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5160 if (aack->data != NULL) { 5161 sctp_m_freem(aack->data); 5162 } 5163 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5164 } 5165 /* clean up auth stuff */ 5166 if (asoc->local_hmacs) 5167 sctp_free_hmaclist(asoc->local_hmacs); 5168 if (asoc->peer_hmacs) 5169 sctp_free_hmaclist(asoc->peer_hmacs); 5170 5171 if (asoc->local_auth_chunks) 5172 sctp_free_chunklist(asoc->local_auth_chunks); 5173 if (asoc->peer_auth_chunks) 5174 sctp_free_chunklist(asoc->peer_auth_chunks); 5175 5176 sctp_free_authinfo(&asoc->authinfo); 5177 5178 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5179 LIST_REMOVE(shared_key, next); 5180 sctp_free_sharedkey(shared_key); 5181 /* sa_ignore FREED_MEMORY */ 5182 } 5183 5184 /* Insert new items here :> */ 5185 5186 /* Get rid of LOCK */ 5187 SCTP_TCB_UNLOCK(stcb); 5188 SCTP_TCB_LOCK_DESTROY(stcb); 5189 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5190 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5191 SCTP_INP_INFO_WUNLOCK(); 5192 SCTP_INP_RLOCK(inp); 5193 } 5194#ifdef SCTP_TRACK_FREED_ASOCS 5195 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5196 /* now clean up the tasoc itself */ 5197 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5198 SCTP_DECR_ASOC_COUNT(); 5199 } else { 5200 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5201 } 5202#else 5203 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5204 SCTP_DECR_ASOC_COUNT(); 5205#endif 5206 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5207 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5208 /* 5209 * If its NOT the inp_free calling us AND sctp_close 5210 * as been called, we call back... 5211 */ 5212 SCTP_INP_RUNLOCK(inp); 5213 /* 5214 * This will start the kill timer (if we are the 5215 * last one) since we hold an increment yet. But 5216 * this is the only safe way to do this since 5217 * otherwise if the socket closes at the same time 5218 * we are here we might collide in the cleanup. 5219 */ 5220 sctp_inpcb_free(inp, 5221 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5222 SCTP_CALLED_DIRECTLY_NOCMPSET); 5223 SCTP_INP_DECR_REF(inp); 5224 goto out_of; 5225 } else { 5226 /* The socket is still open. */ 5227 SCTP_INP_DECR_REF(inp); 5228 } 5229 } 5230 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5231 SCTP_INP_RUNLOCK(inp); 5232 } 5233out_of: 5234 /* destroyed the asoc */ 5235#ifdef SCTP_LOG_CLOSING 5236 sctp_log_closing(inp, NULL, 11); 5237#endif 5238 return (1); 5239} 5240 5241 5242 5243/* 5244 * determine if a destination is "reachable" based upon the addresses bound 5245 * to the current endpoint (e.g. only v4 or v6 currently bound) 5246 */ 5247/* 5248 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5249 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5250 * types bound as its endpoint 5251 */ 5252int 5253sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5254{ 5255 struct sctp_inpcb *inp; 5256 int answer; 5257 5258 /* 5259 * No locks here, the TCB, in all cases is already locked and an 5260 * assoc is up. There is either a INP lock by the caller applied (in 5261 * asconf case when deleting an address) or NOT in the HB case, 5262 * however if HB then the INP increment is up and the INP will not 5263 * be removed (on top of the fact that we have a TCB lock). So we 5264 * only want to read the sctp_flags, which is either bound-all or 5265 * not.. no protection needed since once an assoc is up you can't be 5266 * changing your binding. 5267 */ 5268 inp = stcb->sctp_ep; 5269 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5270 /* if bound all, destination is not restricted */ 5271 /* 5272 * RRS: Question during lock work: Is this correct? If you 5273 * are bound-all you still might need to obey the V4--V6 5274 * flags??? IMO this bound-all stuff needs to be removed! 5275 */ 5276 return (1); 5277 } 5278 /* NOTE: all "scope" checks are done when local addresses are added */ 5279 switch (destaddr->sa_family) { 5280#ifdef INET6 5281 case AF_INET6: 5282 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5283 break; 5284#endif 5285#ifdef INET 5286 case AF_INET: 5287 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5288 break; 5289#endif 5290 default: 5291 /* invalid family, so it's unreachable */ 5292 answer = 0; 5293 break; 5294 } 5295 return (answer); 5296} 5297 5298/* 5299 * update the inp_vflags on an endpoint 5300 */ 5301static void 5302sctp_update_ep_vflag(struct sctp_inpcb *inp) 5303{ 5304 struct sctp_laddr *laddr; 5305 5306 /* first clear the flag */ 5307 inp->ip_inp.inp.inp_vflag = 0; 5308 /* set the flag based on addresses on the ep list */ 5309 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5310 if (laddr->ifa == NULL) { 5311 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5312 __FUNCTION__); 5313 continue; 5314 } 5315 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5316 continue; 5317 } 5318 switch (laddr->ifa->address.sa.sa_family) { 5319#ifdef INET6 5320 case AF_INET6: 5321 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5322 break; 5323#endif 5324#ifdef INET 5325 case AF_INET: 5326 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5327 break; 5328#endif 5329 default: 5330 break; 5331 } 5332 } 5333} 5334 5335/* 5336 * Add the address to the endpoint local address list There is nothing to be 5337 * done if we are bound to all addresses 5338 */ 5339void 5340sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5341{ 5342 struct sctp_laddr *laddr; 5343 int fnd, error = 0; 5344 5345 fnd = 0; 5346 5347 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5348 /* You are already bound to all. You have it already */ 5349 return; 5350 } 5351#ifdef INET6 5352 if (ifa->address.sa.sa_family == AF_INET6) { 5353 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5354 /* Can't bind a non-useable addr. */ 5355 return; 5356 } 5357 } 5358#endif 5359 /* first, is it already present? */ 5360 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5361 if (laddr->ifa == ifa) { 5362 fnd = 1; 5363 break; 5364 } 5365 } 5366 5367 if (fnd == 0) { 5368 /* Not in the ep list */ 5369 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5370 if (error != 0) 5371 return; 5372 inp->laddr_count++; 5373 /* update inp_vflag flags */ 5374 switch (ifa->address.sa.sa_family) { 5375#ifdef INET6 5376 case AF_INET6: 5377 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5378 break; 5379#endif 5380#ifdef INET 5381 case AF_INET: 5382 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5383 break; 5384#endif 5385 default: 5386 break; 5387 } 5388 } 5389 return; 5390} 5391 5392 5393/* 5394 * select a new (hopefully reachable) destination net (should only be used 5395 * when we deleted an ep addr that is the only usable source address to reach 5396 * the destination net) 5397 */ 5398static void 5399sctp_select_primary_destination(struct sctp_tcb *stcb) 5400{ 5401 struct sctp_nets *net; 5402 5403 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5404 /* for now, we'll just pick the first reachable one we find */ 5405 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5406 continue; 5407 if (sctp_destination_is_reachable(stcb, 5408 (struct sockaddr *)&net->ro._l_addr)) { 5409 /* found a reachable destination */ 5410 stcb->asoc.primary_destination = net; 5411 } 5412 } 5413 /* I can't there from here! ...we're gonna die shortly... */ 5414} 5415 5416 5417/* 5418 * Delete the address from the endpoint local address list There is nothing 5419 * to be done if we are bound to all addresses 5420 */ 5421void 5422sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5423{ 5424 struct sctp_laddr *laddr; 5425 int fnd; 5426 5427 fnd = 0; 5428 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5429 /* You are already bound to all. You have it already */ 5430 return; 5431 } 5432 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5433 if (laddr->ifa == ifa) { 5434 fnd = 1; 5435 break; 5436 } 5437 } 5438 if (fnd && (inp->laddr_count < 2)) { 5439 /* can't delete unless there are at LEAST 2 addresses */ 5440 return; 5441 } 5442 if (fnd) { 5443 /* 5444 * clean up any use of this address go through our 5445 * associations and clear any last_used_address that match 5446 * this one for each assoc, see if a new primary_destination 5447 * is needed 5448 */ 5449 struct sctp_tcb *stcb; 5450 5451 /* clean up "next_addr_touse" */ 5452 if (inp->next_addr_touse == laddr) 5453 /* delete this address */ 5454 inp->next_addr_touse = NULL; 5455 5456 /* clean up "last_used_address" */ 5457 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5458 struct sctp_nets *net; 5459 5460 SCTP_TCB_LOCK(stcb); 5461 if (stcb->asoc.last_used_address == laddr) 5462 /* delete this address */ 5463 stcb->asoc.last_used_address = NULL; 5464 /* 5465 * Now spin through all the nets and purge any ref 5466 * to laddr 5467 */ 5468 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5469 if (net->ro._s_addr && 5470 (net->ro._s_addr->ifa == laddr->ifa)) { 5471 /* Yep, purge src address selected */ 5472 sctp_rtentry_t *rt; 5473 5474 /* delete this address if cached */ 5475 rt = net->ro.ro_rt; 5476 if (rt != NULL) { 5477 RTFREE(rt); 5478 net->ro.ro_rt = NULL; 5479 } 5480 sctp_free_ifa(net->ro._s_addr); 5481 net->ro._s_addr = NULL; 5482 net->src_addr_selected = 0; 5483 } 5484 } 5485 SCTP_TCB_UNLOCK(stcb); 5486 } /* for each tcb */ 5487 /* remove it from the ep list */ 5488 sctp_remove_laddr(laddr); 5489 inp->laddr_count--; 5490 /* update inp_vflag flags */ 5491 sctp_update_ep_vflag(inp); 5492 } 5493 return; 5494} 5495 5496/* 5497 * Add the address to the TCB local address restricted list. 5498 * This is a "pending" address list (eg. addresses waiting for an 5499 * ASCONF-ACK response) and cannot be used as a valid source address. 5500 */ 5501void 5502sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5503{ 5504 struct sctp_laddr *laddr; 5505 struct sctpladdr *list; 5506 5507 /* 5508 * Assumes TCB is locked.. and possibly the INP. May need to 5509 * confirm/fix that if we need it and is not the case. 5510 */ 5511 list = &stcb->asoc.sctp_restricted_addrs; 5512 5513#ifdef INET6 5514 if (ifa->address.sa.sa_family == AF_INET6) { 5515 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5516 /* Can't bind a non-existent addr. */ 5517 return; 5518 } 5519 } 5520#endif 5521 /* does the address already exist? */ 5522 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5523 if (laddr->ifa == ifa) { 5524 return; 5525 } 5526 } 5527 5528 /* add to the list */ 5529 (void)sctp_insert_laddr(list, ifa, 0); 5530 return; 5531} 5532 5533/* 5534 * insert an laddr entry with the given ifa for the desired list 5535 */ 5536int 5537sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5538{ 5539 struct sctp_laddr *laddr; 5540 5541 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5542 if (laddr == NULL) { 5543 /* out of memory? */ 5544 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5545 return (EINVAL); 5546 } 5547 SCTP_INCR_LADDR_COUNT(); 5548 bzero(laddr, sizeof(*laddr)); 5549 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5550 laddr->ifa = ifa; 5551 laddr->action = act; 5552 atomic_add_int(&ifa->refcount, 1); 5553 /* insert it */ 5554 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5555 5556 return (0); 5557} 5558 5559/* 5560 * Remove an laddr entry from the local address list (on an assoc) 5561 */ 5562void 5563sctp_remove_laddr(struct sctp_laddr *laddr) 5564{ 5565 5566 /* remove from the list */ 5567 LIST_REMOVE(laddr, sctp_nxt_addr); 5568 sctp_free_ifa(laddr->ifa); 5569 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5570 SCTP_DECR_LADDR_COUNT(); 5571} 5572 5573/* 5574 * Remove a local address from the TCB local address restricted list 5575 */ 5576void 5577sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5578{ 5579 struct sctp_inpcb *inp; 5580 struct sctp_laddr *laddr; 5581 5582 /* 5583 * This is called by asconf work. It is assumed that a) The TCB is 5584 * locked and b) The INP is locked. This is true in as much as I can 5585 * trace through the entry asconf code where I did these locks. 5586 * Again, the ASCONF code is a bit different in that it does lock 5587 * the INP during its work often times. This must be since we don't 5588 * want other proc's looking up things while what they are looking 5589 * up is changing :-D 5590 */ 5591 5592 inp = stcb->sctp_ep; 5593 /* if subset bound and don't allow ASCONF's, can't delete last */ 5594 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5595 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5596 if (stcb->sctp_ep->laddr_count < 2) { 5597 /* can't delete last address */ 5598 return; 5599 } 5600 } 5601 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5602 /* remove the address if it exists */ 5603 if (laddr->ifa == NULL) 5604 continue; 5605 if (laddr->ifa == ifa) { 5606 sctp_remove_laddr(laddr); 5607 return; 5608 } 5609 } 5610 5611 /* address not found! */ 5612 return; 5613} 5614 5615/* 5616 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5617 */ 5618/* sysctl */ 5619static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5620static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5621 5622 5623 5624#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5625struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5626int *sctp_cpuarry = NULL; 5627void 5628sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5629{ 5630 /* Queue a packet to a processor for the specified core */ 5631 struct sctp_mcore_queue *qent; 5632 struct sctp_mcore_ctrl *wkq; 5633 int need_wake = 0; 5634 5635 if (sctp_mcore_workers == NULL) { 5636 /* Something went way bad during setup */ 5637 sctp_input_with_port(m, off, 0); 5638 return; 5639 } 5640 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5641 (sizeof(struct sctp_mcore_queue)), 5642 SCTP_M_MCORE); 5643 if (qent == NULL) { 5644 /* This is trouble */ 5645 sctp_input_with_port(m, off, 0); 5646 return; 5647 } 5648 qent->vn = curvnet; 5649 qent->m = m; 5650 qent->off = off; 5651 qent->v6 = 0; 5652 wkq = &sctp_mcore_workers[cpu_to_use]; 5653 SCTP_MCORE_QLOCK(wkq); 5654 5655 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5656 if (wkq->running == 0) { 5657 need_wake = 1; 5658 } 5659 SCTP_MCORE_QUNLOCK(wkq); 5660 if (need_wake) { 5661 wakeup(&wkq->running); 5662 } 5663} 5664 5665static void 5666sctp_mcore_thread(void *arg) 5667{ 5668 5669 struct sctp_mcore_ctrl *wkq; 5670 struct sctp_mcore_queue *qent; 5671 5672 wkq = (struct sctp_mcore_ctrl *)arg; 5673 struct mbuf *m; 5674 int off, v6; 5675 5676 /* Wait for first tickle */ 5677 SCTP_MCORE_LOCK(wkq); 5678 wkq->running = 0; 5679 msleep(&wkq->running, 5680 &wkq->core_mtx, 5681 0, "wait for pkt", 0); 5682 SCTP_MCORE_UNLOCK(wkq); 5683 5684 /* Bind to our cpu */ 5685 thread_lock(curthread); 5686 sched_bind(curthread, wkq->cpuid); 5687 thread_unlock(curthread); 5688 5689 /* Now lets start working */ 5690 SCTP_MCORE_LOCK(wkq); 5691 /* Now grab lock and go */ 5692 for (;;) { 5693 SCTP_MCORE_QLOCK(wkq); 5694skip_sleep: 5695 wkq->running = 1; 5696 qent = TAILQ_FIRST(&wkq->que); 5697 if (qent) { 5698 TAILQ_REMOVE(&wkq->que, qent, next); 5699 SCTP_MCORE_QUNLOCK(wkq); 5700 CURVNET_SET(qent->vn); 5701 m = qent->m; 5702 off = qent->off; 5703 v6 = qent->v6; 5704 SCTP_FREE(qent, SCTP_M_MCORE); 5705 if (v6 == 0) { 5706 sctp_input_with_port(m, off, 0); 5707 } else { 5708 SCTP_PRINTF("V6 not yet supported\n"); 5709 sctp_m_freem(m); 5710 } 5711 CURVNET_RESTORE(); 5712 SCTP_MCORE_QLOCK(wkq); 5713 } 5714 wkq->running = 0; 5715 if (!TAILQ_EMPTY(&wkq->que)) { 5716 goto skip_sleep; 5717 } 5718 SCTP_MCORE_QUNLOCK(wkq); 5719 msleep(&wkq->running, 5720 &wkq->core_mtx, 5721 0, "wait for pkt", 0); 5722 } 5723} 5724 5725static void 5726sctp_startup_mcore_threads(void) 5727{ 5728 int i, cpu; 5729 5730 if (mp_ncpus == 1) 5731 return; 5732 5733 if (sctp_mcore_workers != NULL) { 5734 /* 5735 * Already been here in some previous vnet? 5736 */ 5737 return; 5738 } 5739 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5740 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5741 SCTP_M_MCORE); 5742 if (sctp_mcore_workers == NULL) { 5743 /* TSNH I hope */ 5744 return; 5745 } 5746 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5747 sizeof(struct sctp_mcore_ctrl))); 5748 /* Init the structures */ 5749 for (i = 0; i <= mp_maxid; i++) { 5750 TAILQ_INIT(&sctp_mcore_workers[i].que); 5751 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5752 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5753 sctp_mcore_workers[i].cpuid = i; 5754 } 5755 if (sctp_cpuarry == NULL) { 5756 SCTP_MALLOC(sctp_cpuarry, int *, 5757 (mp_ncpus * sizeof(int)), 5758 SCTP_M_MCORE); 5759 i = 0; 5760 CPU_FOREACH(cpu) { 5761 sctp_cpuarry[i] = cpu; 5762 i++; 5763 } 5764 } 5765 /* Now start them all */ 5766 CPU_FOREACH(cpu) { 5767 (void)kproc_create(sctp_mcore_thread, 5768 (void *)&sctp_mcore_workers[cpu], 5769 &sctp_mcore_workers[cpu].thread_proc, 5770 RFPROC, 5771 SCTP_KTHREAD_PAGES, 5772 SCTP_MCORE_NAME); 5773 5774 } 5775} 5776 5777#endif 5778 5779void 5780sctp_pcb_init() 5781{ 5782 /* 5783 * SCTP initialization for the PCB structures should be called by 5784 * the sctp_init() funciton. 5785 */ 5786 int i; 5787 struct timeval tv; 5788 5789 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5790 /* error I was called twice */ 5791 return; 5792 } 5793 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5794 5795#if defined(SCTP_LOCAL_TRACE_BUF) 5796 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5797#endif 5798#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5799 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5800 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5801 SCTP_M_MCORE); 5802#endif 5803 (void)SCTP_GETTIME_TIMEVAL(&tv); 5804#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5805 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5806 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5807 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5808#else 5809 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5810 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5811 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5812#endif 5813 /* init the empty list of (All) Endpoints */ 5814 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5815 5816 5817 /* init the hash table of endpoints */ 5818 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5819 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5820 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5821 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5822 &SCTP_BASE_INFO(hashasocmark)); 5823 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5824 &SCTP_BASE_INFO(hashmark)); 5825 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5826 &SCTP_BASE_INFO(hashtcpmark)); 5827 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5828 5829 5830 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5831 &SCTP_BASE_INFO(hashvrfmark)); 5832 5833 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5834 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5835 /* init the zones */ 5836 /* 5837 * FIX ME: Should check for NULL returns, but if it does fail we are 5838 * doomed to panic anyways... add later maybe. 5839 */ 5840 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5841 sizeof(struct sctp_inpcb), maxsockets); 5842 5843 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5844 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5845 5846 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5847 sizeof(struct sctp_laddr), 5848 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5849 5850 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5851 sizeof(struct sctp_nets), 5852 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5853 5854 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5855 sizeof(struct sctp_tmit_chunk), 5856 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5857 5858 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5859 sizeof(struct sctp_queued_to_read), 5860 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5861 5862 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5863 sizeof(struct sctp_stream_queue_pending), 5864 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5865 5866 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5867 sizeof(struct sctp_asconf), 5868 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5869 5870 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5871 sizeof(struct sctp_asconf_ack), 5872 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5873 5874 5875 /* Master Lock INIT for info structure */ 5876 SCTP_INP_INFO_LOCK_INIT(); 5877 SCTP_STATLOG_INIT_LOCK(); 5878 5879 SCTP_IPI_COUNT_INIT(); 5880 SCTP_IPI_ADDR_INIT(); 5881#ifdef SCTP_PACKET_LOGGING 5882 SCTP_IP_PKTLOG_INIT(); 5883#endif 5884 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5885 5886 SCTP_WQ_ADDR_INIT(); 5887 /* not sure if we need all the counts */ 5888 SCTP_BASE_INFO(ipi_count_ep) = 0; 5889 /* assoc/tcb zone info */ 5890 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5891 /* local addrlist zone info */ 5892 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5893 /* remote addrlist zone info */ 5894 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5895 /* chunk info */ 5896 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5897 5898 /* socket queue zone info */ 5899 SCTP_BASE_INFO(ipi_count_readq) = 0; 5900 5901 /* stream out queue cont */ 5902 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5903 5904 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5905 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5906 5907 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5908 5909 /* Init the TIMEWAIT list */ 5910 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5911 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5912 } 5913 sctp_startup_iterator(); 5914 5915#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5916 sctp_startup_mcore_threads(); 5917#endif 5918 5919 /* 5920 * INIT the default VRF which for BSD is the only one, other O/S's 5921 * may have more. But initially they must start with one and then 5922 * add the VRF's as addresses are added. 5923 */ 5924 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5925} 5926 5927/* 5928 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5929 */ 5930void 5931sctp_pcb_finish(void) 5932{ 5933 struct sctp_vrflist *vrf_bucket; 5934 struct sctp_vrf *vrf, *nvrf; 5935 struct sctp_ifn *ifn, *nifn; 5936 struct sctp_ifa *ifa, *nifa; 5937 struct sctpvtaghead *chain; 5938 struct sctp_tagblock *twait_block, *prev_twait_block; 5939 struct sctp_laddr *wi, *nwi; 5940 int i; 5941 struct sctp_iterator *it, *nit; 5942 5943 /* 5944 * In FreeBSD the iterator thread never exits but we do clean up. 5945 * The only way FreeBSD reaches here is if we have VRF's but we 5946 * still add the ifdef to make it compile on old versions. 5947 */ 5948 SCTP_IPI_ITERATOR_WQ_LOCK(); 5949 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5950 if (it->vn != curvnet) { 5951 continue; 5952 } 5953 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5954 if (it->function_atend != NULL) { 5955 (*it->function_atend) (it->pointer, it->val); 5956 } 5957 SCTP_FREE(it, SCTP_M_ITER); 5958 } 5959 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5960 SCTP_ITERATOR_LOCK(); 5961 if ((sctp_it_ctl.cur_it) && 5962 (sctp_it_ctl.cur_it->vn == curvnet)) { 5963 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5964 } 5965 SCTP_ITERATOR_UNLOCK(); 5966 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5967 SCTP_WQ_ADDR_LOCK(); 5968 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5969 LIST_REMOVE(wi, sctp_nxt_addr); 5970 SCTP_DECR_LADDR_COUNT(); 5971 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5972 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5973 } 5974 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5975 } 5976 SCTP_WQ_ADDR_UNLOCK(); 5977 5978 /* 5979 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5980 * destroyed first). 5981 */ 5982 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5983 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5984 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5985 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5986 /* free the ifa */ 5987 LIST_REMOVE(ifa, next_bucket); 5988 LIST_REMOVE(ifa, next_ifa); 5989 SCTP_FREE(ifa, SCTP_M_IFA); 5990 } 5991 /* free the ifn */ 5992 LIST_REMOVE(ifn, next_bucket); 5993 LIST_REMOVE(ifn, next_ifn); 5994 SCTP_FREE(ifn, SCTP_M_IFN); 5995 } 5996 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5997 /* free the vrf */ 5998 LIST_REMOVE(vrf, next_vrf); 5999 SCTP_FREE(vrf, SCTP_M_VRF); 6000 } 6001 /* free the vrf hashes */ 6002 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6003 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6004 6005 /* 6006 * free the TIMEWAIT list elements malloc'd in the function 6007 * sctp_add_vtag_to_timewait()... 6008 */ 6009 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6010 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6011 if (!LIST_EMPTY(chain)) { 6012 prev_twait_block = NULL; 6013 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6014 if (prev_twait_block) { 6015 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6016 } 6017 prev_twait_block = twait_block; 6018 } 6019 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6020 } 6021 } 6022 6023 /* free the locks and mutexes */ 6024#ifdef SCTP_PACKET_LOGGING 6025 SCTP_IP_PKTLOG_DESTROY(); 6026#endif 6027 SCTP_IPI_ADDR_DESTROY(); 6028 SCTP_STATLOG_DESTROY(); 6029 SCTP_INP_INFO_LOCK_DESTROY(); 6030 6031 SCTP_WQ_ADDR_DESTROY(); 6032 6033 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6034 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6035 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6036 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6037 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6038 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6039 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6040 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6041 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6042 /* Get rid of other stuff to */ 6043 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6044 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6045 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6046 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6047 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6048 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6049#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6050 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6051#endif 6052} 6053 6054 6055int 6056sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6057 int offset, int limit, 6058 struct sockaddr *src, struct sockaddr *dst, 6059 struct sockaddr *altsa) 6060{ 6061 /* 6062 * grub through the INIT pulling addresses and loading them to the 6063 * nets structure in the asoc. The from address in the mbuf should 6064 * also be loaded (if it is not already). This routine can be called 6065 * with either INIT or INIT-ACK's as long as the m points to the IP 6066 * packet and the offset points to the beginning of the parameters. 6067 */ 6068 struct sctp_inpcb *inp; 6069 struct sctp_nets *net, *nnet, *net_tmp; 6070 struct sctp_paramhdr *phdr, parm_buf; 6071 struct sctp_tcb *stcb_tmp; 6072 uint16_t ptype, plen; 6073 struct sockaddr *sa; 6074 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6075 struct sctp_auth_random *p_random = NULL; 6076 uint16_t random_len = 0; 6077 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6078 struct sctp_auth_hmac_algo *hmacs = NULL; 6079 uint16_t hmacs_len = 0; 6080 uint8_t saw_asconf = 0; 6081 uint8_t saw_asconf_ack = 0; 6082 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6083 struct sctp_auth_chunk_list *chunks = NULL; 6084 uint16_t num_chunks = 0; 6085 sctp_key_t *new_key; 6086 uint32_t keylen; 6087 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6088 uint8_t peer_supports_ecn; 6089 uint8_t peer_supports_prsctp; 6090 uint8_t peer_supports_auth; 6091 uint8_t peer_supports_asconf; 6092 uint8_t peer_supports_asconf_ack; 6093 uint8_t peer_supports_reconfig; 6094 uint8_t peer_supports_nrsack; 6095 uint8_t peer_supports_pktdrop; 6096 6097#ifdef INET 6098 struct sockaddr_in sin; 6099 6100#endif 6101#ifdef INET6 6102 struct sockaddr_in6 sin6; 6103 6104#endif 6105 6106 /* First get the destination address setup too. */ 6107#ifdef INET 6108 memset(&sin, 0, sizeof(sin)); 6109 sin.sin_family = AF_INET; 6110 sin.sin_len = sizeof(sin); 6111 sin.sin_port = stcb->rport; 6112#endif 6113#ifdef INET6 6114 memset(&sin6, 0, sizeof(sin6)); 6115 sin6.sin6_family = AF_INET6; 6116 sin6.sin6_len = sizeof(struct sockaddr_in6); 6117 sin6.sin6_port = stcb->rport; 6118#endif 6119 if (altsa) { 6120 sa = altsa; 6121 } else { 6122 sa = src; 6123 } 6124 peer_supports_ecn = 0; 6125 peer_supports_prsctp = 0; 6126 peer_supports_auth = 0; 6127 peer_supports_asconf = 0; 6128 peer_supports_reconfig = 0; 6129 peer_supports_nrsack = 0; 6130 peer_supports_pktdrop = 0; 6131 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6132 /* mark all addresses that we have currently on the list */ 6133 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6134 } 6135 /* does the source address already exist? if so skip it */ 6136 inp = stcb->sctp_ep; 6137 atomic_add_int(&stcb->asoc.refcnt, 1); 6138 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6139 atomic_add_int(&stcb->asoc.refcnt, -1); 6140 6141 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6142 /* we must add the source address */ 6143 /* no scope set here since we have a tcb already. */ 6144 switch (sa->sa_family) { 6145#ifdef INET 6146 case AF_INET: 6147 if (stcb->asoc.scope.ipv4_addr_legal) { 6148 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6149 return (-1); 6150 } 6151 } 6152 break; 6153#endif 6154#ifdef INET6 6155 case AF_INET6: 6156 if (stcb->asoc.scope.ipv6_addr_legal) { 6157 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6158 return (-2); 6159 } 6160 } 6161 break; 6162#endif 6163 default: 6164 break; 6165 } 6166 } else { 6167 if (net_tmp != NULL && stcb_tmp == stcb) { 6168 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6169 } else if (stcb_tmp != stcb) { 6170 /* It belongs to another association? */ 6171 if (stcb_tmp) 6172 SCTP_TCB_UNLOCK(stcb_tmp); 6173 return (-3); 6174 } 6175 } 6176 if (stcb->asoc.state == 0) { 6177 /* the assoc was freed? */ 6178 return (-4); 6179 } 6180 /* now we must go through each of the params. */ 6181 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6182 while (phdr) { 6183 ptype = ntohs(phdr->param_type); 6184 plen = ntohs(phdr->param_length); 6185 /* 6186 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6187 * (uint32_t)ptype, (int)plen); 6188 */ 6189 if (offset + plen > limit) { 6190 break; 6191 } 6192 if (plen == 0) { 6193 break; 6194 } 6195#ifdef INET 6196 if (ptype == SCTP_IPV4_ADDRESS) { 6197 if (stcb->asoc.scope.ipv4_addr_legal) { 6198 struct sctp_ipv4addr_param *p4, p4_buf; 6199 6200 /* ok get the v4 address and check/add */ 6201 phdr = sctp_get_next_param(m, offset, 6202 (struct sctp_paramhdr *)&p4_buf, 6203 sizeof(p4_buf)); 6204 if (plen != sizeof(struct sctp_ipv4addr_param) || 6205 phdr == NULL) { 6206 return (-5); 6207 } 6208 p4 = (struct sctp_ipv4addr_param *)phdr; 6209 sin.sin_addr.s_addr = p4->addr; 6210 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6211 /* Skip multi-cast addresses */ 6212 goto next_param; 6213 } 6214 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6215 (sin.sin_addr.s_addr == INADDR_ANY)) { 6216 goto next_param; 6217 } 6218 sa = (struct sockaddr *)&sin; 6219 inp = stcb->sctp_ep; 6220 atomic_add_int(&stcb->asoc.refcnt, 1); 6221 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6222 dst, stcb); 6223 atomic_add_int(&stcb->asoc.refcnt, -1); 6224 6225 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6226 inp == NULL) { 6227 /* we must add the source address */ 6228 /* 6229 * no scope set since we have a tcb 6230 * already 6231 */ 6232 6233 /* 6234 * we must validate the state again 6235 * here 6236 */ 6237 add_it_now: 6238 if (stcb->asoc.state == 0) { 6239 /* the assoc was freed? */ 6240 return (-7); 6241 } 6242 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6243 return (-8); 6244 } 6245 } else if (stcb_tmp == stcb) { 6246 if (stcb->asoc.state == 0) { 6247 /* the assoc was freed? */ 6248 return (-10); 6249 } 6250 if (net != NULL) { 6251 /* clear flag */ 6252 net->dest_state &= 6253 ~SCTP_ADDR_NOT_IN_ASSOC; 6254 } 6255 } else { 6256 /* 6257 * strange, address is in another 6258 * assoc? straighten out locks. 6259 */ 6260 if (stcb_tmp) { 6261 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6262 /* 6263 * in setup state we 6264 * abort this guy 6265 */ 6266 sctp_abort_an_association(stcb_tmp->sctp_ep, 6267 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6268 goto add_it_now; 6269 } 6270 SCTP_TCB_UNLOCK(stcb_tmp); 6271 } 6272 if (stcb->asoc.state == 0) { 6273 /* the assoc was freed? */ 6274 return (-12); 6275 } 6276 return (-13); 6277 } 6278 } 6279 } else 6280#endif 6281#ifdef INET6 6282 if (ptype == SCTP_IPV6_ADDRESS) { 6283 if (stcb->asoc.scope.ipv6_addr_legal) { 6284 /* ok get the v6 address and check/add */ 6285 struct sctp_ipv6addr_param *p6, p6_buf; 6286 6287 phdr = sctp_get_next_param(m, offset, 6288 (struct sctp_paramhdr *)&p6_buf, 6289 sizeof(p6_buf)); 6290 if (plen != sizeof(struct sctp_ipv6addr_param) || 6291 phdr == NULL) { 6292 return (-14); 6293 } 6294 p6 = (struct sctp_ipv6addr_param *)phdr; 6295 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6296 sizeof(p6->addr)); 6297 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6298 /* Skip multi-cast addresses */ 6299 goto next_param; 6300 } 6301 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6302 /* 6303 * Link local make no sense without 6304 * scope 6305 */ 6306 goto next_param; 6307 } 6308 sa = (struct sockaddr *)&sin6; 6309 inp = stcb->sctp_ep; 6310 atomic_add_int(&stcb->asoc.refcnt, 1); 6311 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6312 dst, stcb); 6313 atomic_add_int(&stcb->asoc.refcnt, -1); 6314 if (stcb_tmp == NULL && 6315 (inp == stcb->sctp_ep || inp == NULL)) { 6316 /* 6317 * we must validate the state again 6318 * here 6319 */ 6320 add_it_now6: 6321 if (stcb->asoc.state == 0) { 6322 /* the assoc was freed? */ 6323 return (-16); 6324 } 6325 /* 6326 * we must add the address, no scope 6327 * set 6328 */ 6329 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6330 return (-17); 6331 } 6332 } else if (stcb_tmp == stcb) { 6333 /* 6334 * we must validate the state again 6335 * here 6336 */ 6337 if (stcb->asoc.state == 0) { 6338 /* the assoc was freed? */ 6339 return (-19); 6340 } 6341 if (net != NULL) { 6342 /* clear flag */ 6343 net->dest_state &= 6344 ~SCTP_ADDR_NOT_IN_ASSOC; 6345 } 6346 } else { 6347 /* 6348 * strange, address is in another 6349 * assoc? straighten out locks. 6350 */ 6351 if (stcb_tmp) 6352 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6353 /* 6354 * in setup state we 6355 * abort this guy 6356 */ 6357 sctp_abort_an_association(stcb_tmp->sctp_ep, 6358 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6359 goto add_it_now6; 6360 } 6361 SCTP_TCB_UNLOCK(stcb_tmp); 6362 6363 if (stcb->asoc.state == 0) { 6364 /* the assoc was freed? */ 6365 return (-21); 6366 } 6367 return (-22); 6368 } 6369 } 6370 } else 6371#endif 6372 if (ptype == SCTP_ECN_CAPABLE) { 6373 peer_supports_ecn = 1; 6374 } else if (ptype == SCTP_ULP_ADAPTATION) { 6375 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6376 struct sctp_adaptation_layer_indication ai, 6377 *aip; 6378 6379 phdr = sctp_get_next_param(m, offset, 6380 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6381 aip = (struct sctp_adaptation_layer_indication *)phdr; 6382 if (aip) { 6383 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6384 stcb->asoc.adaptation_needed = 1; 6385 } 6386 } 6387 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6388 struct sctp_asconf_addr_param lstore, *fee; 6389 int lptype; 6390 struct sockaddr *lsa = NULL; 6391 6392#ifdef INET 6393 struct sctp_asconf_addrv4_param *fii; 6394 6395#endif 6396 6397 if (stcb->asoc.asconf_supported == 0) { 6398 return (-100); 6399 } 6400 if (plen > sizeof(lstore)) { 6401 return (-23); 6402 } 6403 phdr = sctp_get_next_param(m, offset, 6404 (struct sctp_paramhdr *)&lstore, 6405 min(plen, sizeof(lstore))); 6406 if (phdr == NULL) { 6407 return (-24); 6408 } 6409 fee = (struct sctp_asconf_addr_param *)phdr; 6410 lptype = ntohs(fee->addrp.ph.param_type); 6411 switch (lptype) { 6412#ifdef INET 6413 case SCTP_IPV4_ADDRESS: 6414 if (plen != 6415 sizeof(struct sctp_asconf_addrv4_param)) { 6416 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6417 (int)sizeof(struct sctp_asconf_addrv4_param), 6418 plen); 6419 } else { 6420 fii = (struct sctp_asconf_addrv4_param *)fee; 6421 sin.sin_addr.s_addr = fii->addrp.addr; 6422 lsa = (struct sockaddr *)&sin; 6423 } 6424 break; 6425#endif 6426#ifdef INET6 6427 case SCTP_IPV6_ADDRESS: 6428 if (plen != 6429 sizeof(struct sctp_asconf_addr_param)) { 6430 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6431 (int)sizeof(struct sctp_asconf_addr_param), 6432 plen); 6433 } else { 6434 memcpy(sin6.sin6_addr.s6_addr, 6435 fee->addrp.addr, 6436 sizeof(fee->addrp.addr)); 6437 lsa = (struct sockaddr *)&sin6; 6438 } 6439 break; 6440#endif 6441 default: 6442 break; 6443 } 6444 if (lsa) { 6445 (void)sctp_set_primary_addr(stcb, sa, NULL); 6446 } 6447 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6448 stcb->asoc.peer_supports_nat = 1; 6449 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6450 /* Peer supports pr-sctp */ 6451 peer_supports_prsctp = 1; 6452 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6453 /* A supported extension chunk */ 6454 struct sctp_supported_chunk_types_param *pr_supported; 6455 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6456 int num_ent, i; 6457 6458 phdr = sctp_get_next_param(m, offset, 6459 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6460 if (phdr == NULL) { 6461 return (-25); 6462 } 6463 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6464 num_ent = plen - sizeof(struct sctp_paramhdr); 6465 for (i = 0; i < num_ent; i++) { 6466 switch (pr_supported->chunk_types[i]) { 6467 case SCTP_ASCONF: 6468 peer_supports_asconf = 1; 6469 case SCTP_ASCONF_ACK: 6470 peer_supports_asconf_ack = 1; 6471 break; 6472 case SCTP_FORWARD_CUM_TSN: 6473 peer_supports_prsctp = 1; 6474 break; 6475 case SCTP_PACKET_DROPPED: 6476 peer_supports_pktdrop = 1; 6477 break; 6478 case SCTP_NR_SELECTIVE_ACK: 6479 peer_supports_nrsack = 1; 6480 break; 6481 case SCTP_STREAM_RESET: 6482 peer_supports_reconfig = 1; 6483 break; 6484 case SCTP_AUTHENTICATION: 6485 peer_supports_auth = 1; 6486 break; 6487 default: 6488 /* one I have not learned yet */ 6489 break; 6490 6491 } 6492 } 6493 } else if (ptype == SCTP_RANDOM) { 6494 if (plen > sizeof(random_store)) 6495 break; 6496 if (got_random) { 6497 /* already processed a RANDOM */ 6498 goto next_param; 6499 } 6500 phdr = sctp_get_next_param(m, offset, 6501 (struct sctp_paramhdr *)random_store, 6502 min(sizeof(random_store), plen)); 6503 if (phdr == NULL) 6504 return (-26); 6505 p_random = (struct sctp_auth_random *)phdr; 6506 random_len = plen - sizeof(*p_random); 6507 /* enforce the random length */ 6508 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6509 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6510 return (-27); 6511 } 6512 got_random = 1; 6513 } else if (ptype == SCTP_HMAC_LIST) { 6514 uint16_t num_hmacs; 6515 uint16_t i; 6516 6517 if (plen > sizeof(hmacs_store)) 6518 break; 6519 if (got_hmacs) { 6520 /* already processed a HMAC list */ 6521 goto next_param; 6522 } 6523 phdr = sctp_get_next_param(m, offset, 6524 (struct sctp_paramhdr *)hmacs_store, 6525 min(plen, sizeof(hmacs_store))); 6526 if (phdr == NULL) 6527 return (-28); 6528 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6529 hmacs_len = plen - sizeof(*hmacs); 6530 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6531 /* validate the hmac list */ 6532 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6533 return (-29); 6534 } 6535 if (stcb->asoc.peer_hmacs != NULL) 6536 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6537 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6538 if (stcb->asoc.peer_hmacs != NULL) { 6539 for (i = 0; i < num_hmacs; i++) { 6540 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6541 ntohs(hmacs->hmac_ids[i])); 6542 } 6543 } 6544 got_hmacs = 1; 6545 } else if (ptype == SCTP_CHUNK_LIST) { 6546 int i; 6547 6548 if (plen > sizeof(chunks_store)) 6549 break; 6550 if (got_chklist) { 6551 /* already processed a Chunks list */ 6552 goto next_param; 6553 } 6554 phdr = sctp_get_next_param(m, offset, 6555 (struct sctp_paramhdr *)chunks_store, 6556 min(plen, sizeof(chunks_store))); 6557 if (phdr == NULL) 6558 return (-30); 6559 chunks = (struct sctp_auth_chunk_list *)phdr; 6560 num_chunks = plen - sizeof(*chunks); 6561 if (stcb->asoc.peer_auth_chunks != NULL) 6562 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6563 else 6564 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6565 for (i = 0; i < num_chunks; i++) { 6566 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6567 stcb->asoc.peer_auth_chunks); 6568 /* record asconf/asconf-ack if listed */ 6569 if (chunks->chunk_types[i] == SCTP_ASCONF) 6570 saw_asconf = 1; 6571 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6572 saw_asconf_ack = 1; 6573 6574 } 6575 got_chklist = 1; 6576 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6577 (ptype == SCTP_STATE_COOKIE) || 6578 (ptype == SCTP_UNRECOG_PARAM) || 6579 (ptype == SCTP_COOKIE_PRESERVE) || 6580 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6581 (ptype == SCTP_ADD_IP_ADDRESS) || 6582 (ptype == SCTP_DEL_IP_ADDRESS) || 6583 (ptype == SCTP_ERROR_CAUSE_IND) || 6584 (ptype == SCTP_SUCCESS_REPORT)) { 6585 /* don't care */ ; 6586 } else { 6587 if ((ptype & 0x8000) == 0x0000) { 6588 /* 6589 * must stop processing the rest of the 6590 * param's. Any report bits were handled 6591 * with the call to 6592 * sctp_arethere_unrecognized_parameters() 6593 * when the INIT or INIT-ACK was first seen. 6594 */ 6595 break; 6596 } 6597 } 6598 6599next_param: 6600 offset += SCTP_SIZE32(plen); 6601 if (offset >= limit) { 6602 break; 6603 } 6604 phdr = sctp_get_next_param(m, offset, &parm_buf, 6605 sizeof(parm_buf)); 6606 } 6607 /* Now check to see if we need to purge any addresses */ 6608 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6609 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6610 SCTP_ADDR_NOT_IN_ASSOC) { 6611 /* This address has been removed from the asoc */ 6612 /* remove and free it */ 6613 stcb->asoc.numnets--; 6614 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6615 sctp_free_remote_addr(net); 6616 if (net == stcb->asoc.primary_destination) { 6617 stcb->asoc.primary_destination = NULL; 6618 sctp_select_primary_destination(stcb); 6619 } 6620 } 6621 } 6622 if ((stcb->asoc.ecn_supported == 1) && 6623 (peer_supports_ecn == 0)) { 6624 stcb->asoc.ecn_supported = 0; 6625 } 6626 if ((stcb->asoc.prsctp_supported == 1) && 6627 (peer_supports_prsctp == 0)) { 6628 stcb->asoc.prsctp_supported = 0; 6629 } 6630 if ((stcb->asoc.auth_supported == 1) && 6631 ((peer_supports_auth == 0) || 6632 (got_random == 0) || (got_hmacs == 0))) { 6633 stcb->asoc.auth_supported = 0; 6634 } 6635 if ((stcb->asoc.asconf_supported == 1) && 6636 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6637 (stcb->asoc.auth_supported == 0) || 6638 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6639 stcb->asoc.asconf_supported = 0; 6640 } 6641 if ((stcb->asoc.reconfig_supported == 1) && 6642 (peer_supports_reconfig == 0)) { 6643 stcb->asoc.reconfig_supported = 0; 6644 } 6645 if ((stcb->asoc.nrsack_supported == 1) && 6646 (peer_supports_nrsack == 0)) { 6647 stcb->asoc.nrsack_supported = 0; 6648 } 6649 if ((stcb->asoc.pktdrop_supported == 1) && 6650 (peer_supports_pktdrop == 0)) { 6651 stcb->asoc.pktdrop_supported = 0; 6652 } 6653 /* validate authentication required parameters */ 6654 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6655 /* peer does not support auth but sent a chunks list? */ 6656 return (-31); 6657 } 6658 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6659 /* peer supports asconf but not auth? */ 6660 return (-32); 6661 } else if ((peer_supports_asconf == 1) && 6662 (peer_supports_auth == 1) && 6663 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6664 return (-33); 6665 } 6666 /* concatenate the full random key */ 6667 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6668 if (chunks != NULL) { 6669 keylen += sizeof(*chunks) + num_chunks; 6670 } 6671 new_key = sctp_alloc_key(keylen); 6672 if (new_key != NULL) { 6673 /* copy in the RANDOM */ 6674 if (p_random != NULL) { 6675 keylen = sizeof(*p_random) + random_len; 6676 bcopy(p_random, new_key->key, keylen); 6677 } 6678 /* append in the AUTH chunks */ 6679 if (chunks != NULL) { 6680 bcopy(chunks, new_key->key + keylen, 6681 sizeof(*chunks) + num_chunks); 6682 keylen += sizeof(*chunks) + num_chunks; 6683 } 6684 /* append in the HMACs */ 6685 if (hmacs != NULL) { 6686 bcopy(hmacs, new_key->key + keylen, 6687 sizeof(*hmacs) + hmacs_len); 6688 } 6689 } else { 6690 /* failed to get memory for the key */ 6691 return (-34); 6692 } 6693 if (stcb->asoc.authinfo.peer_random != NULL) 6694 sctp_free_key(stcb->asoc.authinfo.peer_random); 6695 stcb->asoc.authinfo.peer_random = new_key; 6696 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6697 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6698 6699 return (0); 6700} 6701 6702int 6703sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6704 struct sctp_nets *net) 6705{ 6706 /* make sure the requested primary address exists in the assoc */ 6707 if (net == NULL && sa) 6708 net = sctp_findnet(stcb, sa); 6709 6710 if (net == NULL) { 6711 /* didn't find the requested primary address! */ 6712 return (-1); 6713 } else { 6714 /* set the primary address */ 6715 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6716 /* Must be confirmed, so queue to set */ 6717 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6718 return (0); 6719 } 6720 stcb->asoc.primary_destination = net; 6721 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6722 sctp_free_remote_addr(stcb->asoc.alternate); 6723 stcb->asoc.alternate = NULL; 6724 } 6725 net = TAILQ_FIRST(&stcb->asoc.nets); 6726 if (net != stcb->asoc.primary_destination) { 6727 /* 6728 * first one on the list is NOT the primary 6729 * sctp_cmpaddr() is much more efficient if the 6730 * primary is the first on the list, make it so. 6731 */ 6732 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6733 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6734 } 6735 return (0); 6736 } 6737} 6738 6739int 6740sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6741{ 6742 /* 6743 * This function serves two purposes. It will see if a TAG can be 6744 * re-used and return 1 for yes it is ok and 0 for don't use that 6745 * tag. A secondary function it will do is purge out old tags that 6746 * can be removed. 6747 */ 6748 struct sctpvtaghead *chain; 6749 struct sctp_tagblock *twait_block; 6750 struct sctpasochead *head; 6751 struct sctp_tcb *stcb; 6752 int i; 6753 6754 SCTP_INP_INFO_RLOCK(); 6755 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6756 SCTP_BASE_INFO(hashasocmark))]; 6757 if (head == NULL) { 6758 /* invalid vtag */ 6759 goto skip_vtag_check; 6760 } 6761 LIST_FOREACH(stcb, head, sctp_asocs) { 6762 /* 6763 * We choose not to lock anything here. TCB's can't be 6764 * removed since we have the read lock, so they can't be 6765 * freed on us, same thing for the INP. I may be wrong with 6766 * this assumption, but we will go with it for now :-) 6767 */ 6768 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6769 continue; 6770 } 6771 if (stcb->asoc.my_vtag == tag) { 6772 /* candidate */ 6773 if (stcb->rport != rport) { 6774 continue; 6775 } 6776 if (stcb->sctp_ep->sctp_lport != lport) { 6777 continue; 6778 } 6779 /* Its a used tag set */ 6780 SCTP_INP_INFO_RUNLOCK(); 6781 return (0); 6782 } 6783 } 6784skip_vtag_check: 6785 6786 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6787 /* Now what about timed wait ? */ 6788 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6789 /* 6790 * Block(s) are present, lets see if we have this tag in the 6791 * list 6792 */ 6793 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6794 if (twait_block->vtag_block[i].v_tag == 0) { 6795 /* not used */ 6796 continue; 6797 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6798 now->tv_sec) { 6799 /* Audit expires this guy */ 6800 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6801 twait_block->vtag_block[i].v_tag = 0; 6802 twait_block->vtag_block[i].lport = 0; 6803 twait_block->vtag_block[i].rport = 0; 6804 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6805 (twait_block->vtag_block[i].lport == lport) && 6806 (twait_block->vtag_block[i].rport == rport)) { 6807 /* Bad tag, sorry :< */ 6808 SCTP_INP_INFO_RUNLOCK(); 6809 return (0); 6810 } 6811 } 6812 } 6813 SCTP_INP_INFO_RUNLOCK(); 6814 return (1); 6815} 6816 6817static void 6818sctp_drain_mbufs(struct sctp_tcb *stcb) 6819{ 6820 /* 6821 * We must hunt this association for MBUF's past the cumack (i.e. 6822 * out of order data that we can renege on). 6823 */ 6824 struct sctp_association *asoc; 6825 struct sctp_tmit_chunk *chk, *nchk; 6826 uint32_t cumulative_tsn_p1; 6827 struct sctp_queued_to_read *ctl, *nctl; 6828 int cnt, strmat; 6829 uint32_t gap, i; 6830 int fnd = 0; 6831 6832 /* We look for anything larger than the cum-ack + 1 */ 6833 6834 asoc = &stcb->asoc; 6835 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6836 /* none we can reneg on. */ 6837 return; 6838 } 6839 SCTP_STAT_INCR(sctps_protocol_drains_done); 6840 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6841 cnt = 0; 6842 /* First look in the re-assembly queue */ 6843 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6844 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6845 /* Yep it is above cum-ack */ 6846 cnt++; 6847 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6848 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6849 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6850 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6851 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6852 if (chk->data) { 6853 sctp_m_freem(chk->data); 6854 chk->data = NULL; 6855 } 6856 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6857 } 6858 } 6859 /* Ok that was fun, now we will drain all the inbound streams? */ 6860 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6861 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6862 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6863 /* Yep it is above cum-ack */ 6864 cnt++; 6865 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6866 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6867 sctp_ucount_decr(asoc->cnt_on_all_streams); 6868 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6869 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6870 if (ctl->data) { 6871 sctp_m_freem(ctl->data); 6872 ctl->data = NULL; 6873 } 6874 sctp_free_remote_addr(ctl->whoFrom); 6875 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6876 SCTP_DECR_READQ_COUNT(); 6877 } 6878 } 6879 } 6880 if (cnt) { 6881 /* We must back down to see what the new highest is */ 6882 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6883 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6884 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6885 asoc->highest_tsn_inside_map = i; 6886 fnd = 1; 6887 break; 6888 } 6889 } 6890 if (!fnd) { 6891 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6892 } 6893 /* 6894 * Question, should we go through the delivery queue? The 6895 * only reason things are on here is the app not reading OR 6896 * a p-d-api up. An attacker COULD send enough in to 6897 * initiate the PD-API and then send a bunch of stuff to 6898 * other streams... these would wind up on the delivery 6899 * queue.. and then we would not get to them. But in order 6900 * to do this I then have to back-track and un-deliver 6901 * sequence numbers in streams.. el-yucko. I think for now 6902 * we will NOT look at the delivery queue and leave it to be 6903 * something to consider later. An alternative would be to 6904 * abort the P-D-API with a notification and then deliver 6905 * the data.... Or another method might be to keep track of 6906 * how many times the situation occurs and if we see a 6907 * possible attack underway just abort the association. 6908 */ 6909#ifdef SCTP_DEBUG 6910 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6911#endif 6912 /* 6913 * Now do we need to find a new 6914 * asoc->highest_tsn_inside_map? 6915 */ 6916 asoc->last_revoke_count = cnt; 6917 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6918 /* sa_ignore NO_NULL_CHK */ 6919 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6920 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6921 } 6922 /* 6923 * Another issue, in un-setting the TSN's in the mapping array we 6924 * DID NOT adjust the highest_tsn marker. This will cause one of 6925 * two things to occur. It may cause us to do extra work in checking 6926 * for our mapping array movement. More importantly it may cause us 6927 * to SACK every datagram. This may not be a bad thing though since 6928 * we will recover once we get our cum-ack above and all this stuff 6929 * we dumped recovered. 6930 */ 6931} 6932 6933void 6934sctp_drain() 6935{ 6936 /* 6937 * We must walk the PCB lists for ALL associations here. The system 6938 * is LOW on MBUF's and needs help. This is where reneging will 6939 * occur. We really hope this does NOT happen! 6940 */ 6941 VNET_ITERATOR_DECL(vnet_iter); 6942 VNET_LIST_RLOCK_NOSLEEP(); 6943 VNET_FOREACH(vnet_iter) { 6944 CURVNET_SET(vnet_iter); 6945 struct sctp_inpcb *inp; 6946 struct sctp_tcb *stcb; 6947 6948 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6949 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6950#ifdef VIMAGE 6951 continue; 6952#else 6953 return; 6954#endif 6955 } 6956 SCTP_INP_INFO_RLOCK(); 6957 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6958 /* For each endpoint */ 6959 SCTP_INP_RLOCK(inp); 6960 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6961 /* For each association */ 6962 SCTP_TCB_LOCK(stcb); 6963 sctp_drain_mbufs(stcb); 6964 SCTP_TCB_UNLOCK(stcb); 6965 } 6966 SCTP_INP_RUNLOCK(inp); 6967 } 6968 SCTP_INP_INFO_RUNLOCK(); 6969 CURVNET_RESTORE(); 6970 } 6971 VNET_LIST_RUNLOCK_NOSLEEP(); 6972} 6973 6974/* 6975 * start a new iterator 6976 * iterates through all endpoints and associations based on the pcb_state 6977 * flags and asoc_state. "af" (mandatory) is executed for all matching 6978 * assocs and "ef" (optional) is executed when the iterator completes. 6979 * "inpf" (optional) is executed for each new endpoint as it is being 6980 * iterated through. inpe (optional) is called when the inp completes 6981 * its way through all the stcbs. 6982 */ 6983int 6984sctp_initiate_iterator(inp_func inpf, 6985 asoc_func af, 6986 inp_func inpe, 6987 uint32_t pcb_state, 6988 uint32_t pcb_features, 6989 uint32_t asoc_state, 6990 void *argp, 6991 uint32_t argi, 6992 end_func ef, 6993 struct sctp_inpcb *s_inp, 6994 uint8_t chunk_output_off) 6995{ 6996 struct sctp_iterator *it = NULL; 6997 6998 if (af == NULL) { 6999 return (-1); 7000 } 7001 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7002 SCTP_M_ITER); 7003 if (it == NULL) { 7004 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7005 return (ENOMEM); 7006 } 7007 memset(it, 0, sizeof(*it)); 7008 it->function_assoc = af; 7009 it->function_inp = inpf; 7010 if (inpf) 7011 it->done_current_ep = 0; 7012 else 7013 it->done_current_ep = 1; 7014 it->function_atend = ef; 7015 it->pointer = argp; 7016 it->val = argi; 7017 it->pcb_flags = pcb_state; 7018 it->pcb_features = pcb_features; 7019 it->asoc_state = asoc_state; 7020 it->function_inp_end = inpe; 7021 it->no_chunk_output = chunk_output_off; 7022 it->vn = curvnet; 7023 if (s_inp) { 7024 /* Assume lock is held here */ 7025 it->inp = s_inp; 7026 SCTP_INP_INCR_REF(it->inp); 7027 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7028 } else { 7029 SCTP_INP_INFO_RLOCK(); 7030 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7031 if (it->inp) { 7032 SCTP_INP_INCR_REF(it->inp); 7033 } 7034 SCTP_INP_INFO_RUNLOCK(); 7035 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7036 7037 } 7038 SCTP_IPI_ITERATOR_WQ_LOCK(); 7039 7040 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7041 if (sctp_it_ctl.iterator_running == 0) { 7042 sctp_wakeup_iterator(); 7043 } 7044 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7045 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7046 return (0); 7047} 7048