1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_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 60 VNET_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 65 int 66 SCTP6_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 #endif 81 82 void 83 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 84 { 85 /* 86 * We really don't need to lock this, but I will just because it 87 * does not hurt. 88 */ 89 SCTP_INP_INFO_RLOCK(); 90 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 91 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 92 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 93 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 94 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 95 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 96 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 97 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 98 SCTP_INP_INFO_RUNLOCK(); 99 } 100 101 /*- 102 * Addresses are added to VRF's (Virtual Router's). For BSD we 103 * have only the default VRF 0. We maintain a hash list of 104 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 105 * these has a list of addresses. When we add a new address 106 * to a VRF we lookup the ifn/ifn_index, if the ifn does 107 * not exist we create it and add it to the list of IFN's 108 * within the VRF. Once we have the sctp_ifn, we add the 109 * address to the list. So we look something like: 110 * 111 * hash-vrf-table 112 * vrf-> ifn-> ifn -> ifn 113 * vrf | 114 * ... +--ifa-> ifa -> ifa 115 * vrf 116 * 117 * We keep these separate lists since the SCTP subsystem will 118 * point to these from its source address selection nets structure. 119 * When an address is deleted it does not happen right away on 120 * the SCTP side, it gets scheduled. What we do when a 121 * delete happens is immediately remove the address from 122 * the master list and decrement the refcount. As our 123 * addip iterator works through and frees the src address 124 * selection pointing to the sctp_ifa, eventually the refcount 125 * will reach 0 and we will delete it. Note that it is assumed 126 * that any locking on system level ifn/ifa is done at the 127 * caller of these functions and these routines will only 128 * lock the SCTP structures as they add or delete things. 129 * 130 * Other notes on VRF concepts. 131 * - An endpoint can be in multiple VRF's 132 * - An association lives within a VRF and only one VRF. 133 * - Any incoming packet we can deduce the VRF for by 134 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 135 * - Any downward send call or connect call must supply the 136 * VRF via ancillary data or via some sort of set default 137 * VRF socket option call (again for BSD no brainer since 138 * the VRF is always 0). 139 * - An endpoint may add multiple VRF's to it. 140 * - Listening sockets can accept associations in any 141 * of the VRF's they are in but the assoc will end up 142 * in only one VRF (gotten from the packet or connect/send). 143 * 144 */ 145 146 struct sctp_vrf * 147 sctp_allocate_vrf(int vrf_id) 148 { 149 struct sctp_vrf *vrf = NULL; 150 struct sctp_vrflist *bucket; 151 152 /* First allocate the VRF structure */ 153 vrf = sctp_find_vrf(vrf_id); 154 if (vrf) { 155 /* Already allocated */ 156 return (vrf); 157 } 158 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 159 SCTP_M_VRF); 160 if (vrf == NULL) { 161 /* No memory */ 162 #ifdef INVARIANTS 163 panic("No memory for VRF:%d", vrf_id); 164 #endif 165 return (NULL); 166 } 167 /* setup the VRF */ 168 memset(vrf, 0, sizeof(struct sctp_vrf)); 169 vrf->vrf_id = vrf_id; 170 LIST_INIT(&vrf->ifnlist); 171 vrf->total_ifa_count = 0; 172 vrf->refcount = 0; 173 /* now also setup table ids */ 174 SCTP_INIT_VRF_TABLEID(vrf); 175 /* Init the HASH of addresses */ 176 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 177 &vrf->vrf_addr_hashmark); 178 if (vrf->vrf_addr_hash == NULL) { 179 /* No memory */ 180 #ifdef INVARIANTS 181 panic("No memory for VRF:%d", vrf_id); 182 #endif 183 SCTP_FREE(vrf, SCTP_M_VRF); 184 return (NULL); 185 } 186 /* Add it to the hash table */ 187 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 188 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 189 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 190 return (vrf); 191 } 192 193 194 struct sctp_ifn * 195 sctp_find_ifn(void *ifn, uint32_t ifn_index) 196 { 197 struct sctp_ifn *sctp_ifnp; 198 struct sctp_ifnlist *hash_ifn_head; 199 200 /* 201 * We assume the lock is held for the addresses if that's wrong 202 * problems could occur :-) 203 */ 204 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 205 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 206 if (sctp_ifnp->ifn_index == ifn_index) { 207 return (sctp_ifnp); 208 } 209 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 210 return (sctp_ifnp); 211 } 212 } 213 return (NULL); 214 } 215 216 217 struct sctp_vrf * 218 sctp_find_vrf(uint32_t vrf_id) 219 { 220 struct sctp_vrflist *bucket; 221 struct sctp_vrf *liste; 222 223 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 224 LIST_FOREACH(liste, bucket, next_vrf) { 225 if (vrf_id == liste->vrf_id) { 226 return (liste); 227 } 228 } 229 return (NULL); 230 } 231 232 233 void 234 sctp_free_vrf(struct sctp_vrf *vrf) 235 { 236 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 237 if (vrf->vrf_addr_hash) { 238 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 239 vrf->vrf_addr_hash = NULL; 240 } 241 /* We zero'd the count */ 242 LIST_REMOVE(vrf, next_vrf); 243 SCTP_FREE(vrf, SCTP_M_VRF); 244 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 245 } 246 } 247 248 249 void 250 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 251 { 252 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 253 /* We zero'd the count */ 254 if (sctp_ifnp->vrf) { 255 sctp_free_vrf(sctp_ifnp->vrf); 256 } 257 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 258 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 259 } 260 } 261 262 263 void 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 265 { 266 struct sctp_ifn *sctp_ifnp; 267 268 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 269 if (sctp_ifnp != NULL) { 270 sctp_ifnp->ifn_mtu = mtu; 271 } 272 } 273 274 275 void 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 277 { 278 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 279 /* We zero'd the count */ 280 if (sctp_ifap->ifn_p) { 281 sctp_free_ifn(sctp_ifap->ifn_p); 282 } 283 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 284 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 285 } 286 } 287 288 289 static void 290 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 291 { 292 struct sctp_ifn *found; 293 294 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 295 if (found == NULL) { 296 /* Not in the list.. sorry */ 297 return; 298 } 299 if (hold_addr_lock == 0) 300 SCTP_IPI_ADDR_WLOCK(); 301 LIST_REMOVE(sctp_ifnp, next_bucket); 302 LIST_REMOVE(sctp_ifnp, next_ifn); 303 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 304 sctp_ifnp->registered_af); 305 if (hold_addr_lock == 0) 306 SCTP_IPI_ADDR_WUNLOCK(); 307 /* Take away the reference, and possibly free it */ 308 sctp_free_ifn(sctp_ifnp); 309 } 310 311 312 void 313 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 314 const char *if_name, uint32_t ifn_index) 315 { 316 struct sctp_vrf *vrf; 317 struct sctp_ifa *sctp_ifap; 318 319 SCTP_IPI_ADDR_RLOCK(); 320 vrf = sctp_find_vrf(vrf_id); 321 if (vrf == NULL) { 322 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 323 goto out; 324 325 } 326 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 327 if (sctp_ifap == NULL) { 328 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 329 goto out; 330 } 331 if (sctp_ifap->ifn_p == NULL) { 332 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 333 goto out; 334 } 335 if (if_name) { 336 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 337 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 338 sctp_ifap->ifn_p->ifn_name, if_name); 339 goto out; 340 } 341 } else { 342 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 343 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 344 sctp_ifap->ifn_p->ifn_index, ifn_index); 345 goto out; 346 } 347 } 348 349 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 350 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 351 out: 352 SCTP_IPI_ADDR_RUNLOCK(); 353 } 354 355 356 void 357 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 358 const char *if_name, uint32_t ifn_index) 359 { 360 struct sctp_vrf *vrf; 361 struct sctp_ifa *sctp_ifap; 362 363 SCTP_IPI_ADDR_RLOCK(); 364 vrf = sctp_find_vrf(vrf_id); 365 if (vrf == NULL) { 366 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 367 goto out; 368 369 } 370 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 371 if (sctp_ifap == NULL) { 372 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 373 goto out; 374 } 375 if (sctp_ifap->ifn_p == NULL) { 376 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 377 goto out; 378 } 379 if (if_name) { 380 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 381 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 382 sctp_ifap->ifn_p->ifn_name, if_name); 383 goto out; 384 } 385 } else { 386 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 387 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 388 sctp_ifap->ifn_p->ifn_index, ifn_index); 389 goto out; 390 } 391 } 392 393 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 394 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 395 out: 396 SCTP_IPI_ADDR_RUNLOCK(); 397 } 398 399 400 /*- 401 * Add an ifa to an ifn. 402 * Register the interface as necessary. 403 * NOTE: ADDR write lock MUST be held. 404 */ 405 static void 406 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 407 { 408 int ifa_af; 409 410 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 411 sctp_ifap->ifn_p = sctp_ifnp; 412 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 413 /* update address counts */ 414 sctp_ifnp->ifa_count++; 415 ifa_af = sctp_ifap->address.sa.sa_family; 416 switch (ifa_af) { 417 #ifdef INET 418 case AF_INET: 419 sctp_ifnp->num_v4++; 420 break; 421 #endif 422 #ifdef INET6 423 case AF_INET6: 424 sctp_ifnp->num_v6++; 425 break; 426 #endif 427 default: 428 break; 429 } 430 if (sctp_ifnp->ifa_count == 1) { 431 /* register the new interface */ 432 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 433 sctp_ifnp->registered_af = ifa_af; 434 } 435 } 436 437 438 /*- 439 * Remove an ifa from its ifn. 440 * If no more addresses exist, remove the ifn too. Otherwise, re-register 441 * the interface based on the remaining address families left. 442 * NOTE: ADDR write lock MUST be held. 443 */ 444 static void 445 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 446 { 447 LIST_REMOVE(sctp_ifap, next_ifa); 448 if (sctp_ifap->ifn_p) { 449 /* update address counts */ 450 sctp_ifap->ifn_p->ifa_count--; 451 switch (sctp_ifap->address.sa.sa_family) { 452 #ifdef INET 453 case AF_INET: 454 sctp_ifap->ifn_p->num_v4--; 455 break; 456 #endif 457 #ifdef INET6 458 case AF_INET6: 459 sctp_ifap->ifn_p->num_v6--; 460 break; 461 #endif 462 default: 463 break; 464 } 465 466 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 467 /* remove the ifn, possibly freeing it */ 468 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 469 } else { 470 /* re-register address family type, if needed */ 471 if ((sctp_ifap->ifn_p->num_v6 == 0) && 472 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 473 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 474 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 475 sctp_ifap->ifn_p->registered_af = AF_INET; 476 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 477 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 478 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 479 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 480 sctp_ifap->ifn_p->registered_af = AF_INET6; 481 } 482 /* free the ifn refcount */ 483 sctp_free_ifn(sctp_ifap->ifn_p); 484 } 485 sctp_ifap->ifn_p = NULL; 486 } 487 } 488 489 490 struct sctp_ifa * 491 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 492 uint32_t ifn_type, const char *if_name, void *ifa, 493 struct sockaddr *addr, uint32_t ifa_flags, 494 int dynamic_add) 495 { 496 struct sctp_vrf *vrf; 497 struct sctp_ifn *sctp_ifnp = NULL; 498 struct sctp_ifa *sctp_ifap = NULL; 499 struct sctp_ifalist *hash_addr_head; 500 struct sctp_ifnlist *hash_ifn_head; 501 uint32_t hash_of_addr; 502 int new_ifn_af = 0; 503 504 #ifdef SCTP_DEBUG 505 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 506 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 507 #endif 508 SCTP_IPI_ADDR_WLOCK(); 509 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 510 if (sctp_ifnp) { 511 vrf = sctp_ifnp->vrf; 512 } else { 513 vrf = sctp_find_vrf(vrf_id); 514 if (vrf == NULL) { 515 vrf = sctp_allocate_vrf(vrf_id); 516 if (vrf == NULL) { 517 SCTP_IPI_ADDR_WUNLOCK(); 518 return (NULL); 519 } 520 } 521 } 522 if (sctp_ifnp == NULL) { 523 /* 524 * build one and add it, can't hold lock until after malloc 525 * done though. 526 */ 527 SCTP_IPI_ADDR_WUNLOCK(); 528 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 529 sizeof(struct sctp_ifn), SCTP_M_IFN); 530 if (sctp_ifnp == NULL) { 531 #ifdef INVARIANTS 532 panic("No memory for IFN"); 533 #endif 534 return (NULL); 535 } 536 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 537 sctp_ifnp->ifn_index = ifn_index; 538 sctp_ifnp->ifn_p = ifn; 539 sctp_ifnp->ifn_type = ifn_type; 540 sctp_ifnp->refcount = 0; 541 sctp_ifnp->vrf = vrf; 542 atomic_add_int(&vrf->refcount, 1); 543 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 544 if (if_name != NULL) { 545 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 546 } else { 547 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 548 } 549 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 550 LIST_INIT(&sctp_ifnp->ifalist); 551 SCTP_IPI_ADDR_WLOCK(); 552 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 553 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 554 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 555 new_ifn_af = 1; 556 } 557 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 558 if (sctp_ifap) { 559 /* Hmm, it already exists? */ 560 if ((sctp_ifap->ifn_p) && 561 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 562 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 563 sctp_ifap->ifn_p->ifn_name, ifn_index, 564 (void *)sctp_ifap); 565 if (new_ifn_af) { 566 /* Remove the created one that we don't want */ 567 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 568 } 569 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 570 /* easy to solve, just switch back to active */ 571 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 572 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 573 sctp_ifap->ifn_p = sctp_ifnp; 574 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 575 } 576 exit_stage_left: 577 SCTP_IPI_ADDR_WUNLOCK(); 578 return (sctp_ifap); 579 } else { 580 if (sctp_ifap->ifn_p) { 581 /* 582 * The last IFN gets the address, remove the 583 * old one 584 */ 585 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 586 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 587 sctp_ifap->ifn_p->ifn_index, if_name, 588 ifn_index); 589 /* remove the address from the old ifn */ 590 sctp_remove_ifa_from_ifn(sctp_ifap); 591 /* move the address over to the new ifn */ 592 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 593 goto exit_stage_left; 594 } else { 595 /* repair ifnp which was NULL ? */ 596 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 597 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 598 (void *)sctp_ifnp, (void *)sctp_ifap); 599 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 600 } 601 goto exit_stage_left; 602 } 603 } 604 SCTP_IPI_ADDR_WUNLOCK(); 605 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 606 if (sctp_ifap == NULL) { 607 #ifdef INVARIANTS 608 panic("No memory for IFA"); 609 #endif 610 return (NULL); 611 } 612 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 613 sctp_ifap->ifn_p = sctp_ifnp; 614 atomic_add_int(&sctp_ifnp->refcount, 1); 615 sctp_ifap->vrf_id = vrf_id; 616 sctp_ifap->ifa = ifa; 617 memcpy(&sctp_ifap->address, addr, addr->sa_len); 618 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 619 sctp_ifap->flags = ifa_flags; 620 /* Set scope */ 621 switch (sctp_ifap->address.sa.sa_family) { 622 #ifdef INET 623 case AF_INET: 624 { 625 struct sockaddr_in *sin; 626 627 sin = &sctp_ifap->address.sin; 628 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 629 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 630 sctp_ifap->src_is_loop = 1; 631 } 632 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 633 sctp_ifap->src_is_priv = 1; 634 } 635 sctp_ifnp->num_v4++; 636 if (new_ifn_af) 637 new_ifn_af = AF_INET; 638 break; 639 } 640 #endif 641 #ifdef INET6 642 case AF_INET6: 643 { 644 /* ok to use deprecated addresses? */ 645 struct sockaddr_in6 *sin6; 646 647 sin6 = &sctp_ifap->address.sin6; 648 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 649 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 650 sctp_ifap->src_is_loop = 1; 651 } 652 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 653 sctp_ifap->src_is_priv = 1; 654 } 655 sctp_ifnp->num_v6++; 656 if (new_ifn_af) 657 new_ifn_af = AF_INET6; 658 break; 659 } 660 #endif 661 default: 662 new_ifn_af = 0; 663 break; 664 } 665 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 666 667 if ((sctp_ifap->src_is_priv == 0) && 668 (sctp_ifap->src_is_loop == 0)) { 669 sctp_ifap->src_is_glob = 1; 670 } 671 SCTP_IPI_ADDR_WLOCK(); 672 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 673 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 674 sctp_ifap->refcount = 1; 675 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 676 sctp_ifnp->ifa_count++; 677 vrf->total_ifa_count++; 678 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 679 if (new_ifn_af) { 680 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 681 sctp_ifnp->registered_af = new_ifn_af; 682 } 683 SCTP_IPI_ADDR_WUNLOCK(); 684 if (dynamic_add) { 685 /* 686 * Bump up the refcount so that when the timer completes it 687 * will drop back down. 688 */ 689 struct sctp_laddr *wi; 690 691 atomic_add_int(&sctp_ifap->refcount, 1); 692 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 693 if (wi == NULL) { 694 /* 695 * Gak, what can we do? We have lost an address 696 * change can you say HOSED? 697 */ 698 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 699 /* Opps, must decrement the count */ 700 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 701 if_name); 702 return (NULL); 703 } 704 SCTP_INCR_LADDR_COUNT(); 705 bzero(wi, sizeof(*wi)); 706 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 707 wi->ifa = sctp_ifap; 708 wi->action = SCTP_ADD_IP_ADDRESS; 709 710 SCTP_WQ_ADDR_LOCK(); 711 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 712 SCTP_WQ_ADDR_UNLOCK(); 713 714 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 715 (struct sctp_inpcb *)NULL, 716 (struct sctp_tcb *)NULL, 717 (struct sctp_nets *)NULL); 718 } else { 719 /* it's ready for use */ 720 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 721 } 722 return (sctp_ifap); 723 } 724 725 void 726 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 727 uint32_t ifn_index, const char *if_name) 728 { 729 struct sctp_vrf *vrf; 730 struct sctp_ifa *sctp_ifap = NULL; 731 732 SCTP_IPI_ADDR_WLOCK(); 733 vrf = sctp_find_vrf(vrf_id); 734 if (vrf == NULL) { 735 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 736 goto out_now; 737 } 738 #ifdef SCTP_DEBUG 739 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 740 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 741 #endif 742 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 743 if (sctp_ifap) { 744 /* Validate the delete */ 745 if (sctp_ifap->ifn_p) { 746 int valid = 0; 747 748 /*- 749 * The name has priority over the ifn_index 750 * if its given. We do this especially for 751 * panda who might recycle indexes fast. 752 */ 753 if (if_name) { 754 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 755 /* They match its a correct delete */ 756 valid = 1; 757 } 758 } 759 if (!valid) { 760 /* last ditch check ifn_index */ 761 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 762 valid = 1; 763 } 764 } 765 if (!valid) { 766 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 767 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 768 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 769 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 770 SCTP_IPI_ADDR_WUNLOCK(); 771 return; 772 } 773 } 774 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 775 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 776 /* 777 * We don't set the flag. This means that the structure will 778 * hang around in EP's that have bound specific to it until 779 * they close. This gives us TCP like behavior if someone 780 * removes an address (or for that matter adds it right 781 * back). 782 */ 783 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 784 vrf->total_ifa_count--; 785 LIST_REMOVE(sctp_ifap, next_bucket); 786 sctp_remove_ifa_from_ifn(sctp_ifap); 787 } 788 #ifdef SCTP_DEBUG 789 else { 790 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 791 ifn_index); 792 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 793 } 794 #endif 795 796 out_now: 797 SCTP_IPI_ADDR_WUNLOCK(); 798 if (sctp_ifap) { 799 struct sctp_laddr *wi; 800 801 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 802 if (wi == NULL) { 803 /* 804 * Gak, what can we do? We have lost an address 805 * change can you say HOSED? 806 */ 807 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 808 809 /* Oops, must decrement the count */ 810 sctp_free_ifa(sctp_ifap); 811 return; 812 } 813 SCTP_INCR_LADDR_COUNT(); 814 bzero(wi, sizeof(*wi)); 815 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 816 wi->ifa = sctp_ifap; 817 wi->action = SCTP_DEL_IP_ADDRESS; 818 SCTP_WQ_ADDR_LOCK(); 819 /* 820 * Should this really be a tailq? As it is we will process 821 * the newest first :-0 822 */ 823 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 824 SCTP_WQ_ADDR_UNLOCK(); 825 826 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 827 (struct sctp_inpcb *)NULL, 828 (struct sctp_tcb *)NULL, 829 (struct sctp_nets *)NULL); 830 } 831 return; 832 } 833 834 835 static int 836 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 837 { 838 int loopback_scope; 839 #if defined(INET) 840 int ipv4_local_scope, ipv4_addr_legal; 841 #endif 842 #if defined(INET6) 843 int local_scope, site_scope, ipv6_addr_legal; 844 #endif 845 struct sctp_vrf *vrf; 846 struct sctp_ifn *sctp_ifn; 847 struct sctp_ifa *sctp_ifa; 848 849 loopback_scope = stcb->asoc.scope.loopback_scope; 850 #if defined(INET) 851 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 852 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 853 #endif 854 #if defined(INET6) 855 local_scope = stcb->asoc.scope.local_scope; 856 site_scope = stcb->asoc.scope.site_scope; 857 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 858 #endif 859 860 SCTP_IPI_ADDR_RLOCK(); 861 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 862 if (vrf == NULL) { 863 /* no vrf, no addresses */ 864 SCTP_IPI_ADDR_RUNLOCK(); 865 return (0); 866 } 867 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 868 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 869 if ((loopback_scope == 0) && 870 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 871 continue; 872 } 873 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 874 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 875 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 876 /* 877 * We allow pending addresses, where 878 * we have sent an asconf-add to be 879 * considered valid. 880 */ 881 continue; 882 } 883 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 884 continue; 885 } 886 switch (sctp_ifa->address.sa.sa_family) { 887 #ifdef INET 888 case AF_INET: 889 if (ipv4_addr_legal) { 890 struct sockaddr_in *sin, 891 *rsin; 892 893 sin = &sctp_ifa->address.sin; 894 rsin = (struct sockaddr_in *)to; 895 if ((ipv4_local_scope == 0) && 896 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 897 continue; 898 } 899 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 900 &sin->sin_addr) != 0) { 901 continue; 902 } 903 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 904 SCTP_IPI_ADDR_RUNLOCK(); 905 return (1); 906 } 907 } 908 break; 909 #endif 910 #ifdef INET6 911 case AF_INET6: 912 if (ipv6_addr_legal) { 913 struct sockaddr_in6 *sin6, 914 *rsin6; 915 916 sin6 = &sctp_ifa->address.sin6; 917 rsin6 = (struct sockaddr_in6 *)to; 918 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 919 &sin6->sin6_addr) != 0) { 920 continue; 921 } 922 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 923 if (local_scope == 0) 924 continue; 925 if (sin6->sin6_scope_id == 0) { 926 if (sa6_recoverscope(sin6) != 0) 927 continue; 928 } 929 } 930 if ((site_scope == 0) && 931 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 932 continue; 933 } 934 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 935 SCTP_IPI_ADDR_RUNLOCK(); 936 return (1); 937 } 938 } 939 break; 940 #endif 941 default: 942 /* TSNH */ 943 break; 944 } 945 } 946 } 947 } else { 948 struct sctp_laddr *laddr; 949 950 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 951 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 952 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 953 continue; 954 } 955 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 956 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 957 /* 958 * We allow pending addresses, where we have 959 * sent an asconf-add to be considered 960 * valid. 961 */ 962 continue; 963 } 964 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 965 continue; 966 } 967 switch (to->sa_family) { 968 #ifdef INET 969 case AF_INET: 970 { 971 struct sockaddr_in *sin, *rsin; 972 973 sin = &laddr->ifa->address.sin; 974 rsin = (struct sockaddr_in *)to; 975 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 976 SCTP_IPI_ADDR_RUNLOCK(); 977 return (1); 978 } 979 break; 980 } 981 #endif 982 #ifdef INET6 983 case AF_INET6: 984 { 985 struct sockaddr_in6 *sin6, *rsin6; 986 987 sin6 = &laddr->ifa->address.sin6; 988 rsin6 = (struct sockaddr_in6 *)to; 989 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 990 SCTP_IPI_ADDR_RUNLOCK(); 991 return (1); 992 } 993 break; 994 } 995 996 #endif 997 default: 998 /* TSNH */ 999 break; 1000 } 1001 1002 } 1003 } 1004 SCTP_IPI_ADDR_RUNLOCK(); 1005 return (0); 1006 } 1007 1008 1009 static struct sctp_tcb * 1010 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1011 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1012 { 1013 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1014 /* 1015 * If we support the TCP model, then we must now dig through to see 1016 * if we can find our endpoint in the list of tcp ep's. 1017 */ 1018 uint16_t lport, rport; 1019 struct sctppcbhead *ephead; 1020 struct sctp_inpcb *inp; 1021 struct sctp_laddr *laddr; 1022 struct sctp_tcb *stcb; 1023 struct sctp_nets *net; 1024 1025 if ((to == NULL) || (from == NULL)) { 1026 return (NULL); 1027 } 1028 switch (to->sa_family) { 1029 #ifdef INET 1030 case AF_INET: 1031 if (from->sa_family == AF_INET) { 1032 lport = ((struct sockaddr_in *)to)->sin_port; 1033 rport = ((struct sockaddr_in *)from)->sin_port; 1034 } else { 1035 return (NULL); 1036 } 1037 break; 1038 #endif 1039 #ifdef INET6 1040 case AF_INET6: 1041 if (from->sa_family == AF_INET6) { 1042 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1043 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1044 } else { 1045 return (NULL); 1046 } 1047 break; 1048 #endif 1049 default: 1050 return (NULL); 1051 } 1052 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1053 /* 1054 * Ok now for each of the guys in this bucket we must look and see: 1055 * - Does the remote port match. - Does there single association's 1056 * addresses match this address (to). If so we update p_ep to point 1057 * to this ep and return the tcb from it. 1058 */ 1059 LIST_FOREACH(inp, ephead, sctp_hash) { 1060 SCTP_INP_RLOCK(inp); 1061 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1062 SCTP_INP_RUNLOCK(inp); 1063 continue; 1064 } 1065 if (lport != inp->sctp_lport) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 switch (to->sa_family) { 1070 #ifdef INET 1071 case AF_INET: 1072 { 1073 struct sockaddr_in *sin; 1074 1075 sin = (struct sockaddr_in *)to; 1076 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1077 &sin->sin_addr) != 0) { 1078 SCTP_INP_RUNLOCK(inp); 1079 continue; 1080 } 1081 break; 1082 } 1083 #endif 1084 #ifdef INET6 1085 case AF_INET6: 1086 { 1087 struct sockaddr_in6 *sin6; 1088 1089 sin6 = (struct sockaddr_in6 *)to; 1090 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1091 &sin6->sin6_addr) != 0) { 1092 SCTP_INP_RUNLOCK(inp); 1093 continue; 1094 } 1095 break; 1096 } 1097 #endif 1098 default: 1099 SCTP_INP_RUNLOCK(inp); 1100 continue; 1101 } 1102 if (inp->def_vrf_id != vrf_id) { 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 /* check to see if the ep has one of the addresses */ 1107 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1108 /* We are NOT bound all, so look further */ 1109 int match = 0; 1110 1111 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1112 1113 if (laddr->ifa == NULL) { 1114 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1115 continue; 1116 } 1117 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1119 continue; 1120 } 1121 if (laddr->ifa->address.sa.sa_family == 1122 to->sa_family) { 1123 /* see if it matches */ 1124 #ifdef INET 1125 if (from->sa_family == AF_INET) { 1126 struct sockaddr_in *intf_addr, 1127 *sin; 1128 1129 intf_addr = &laddr->ifa->address.sin; 1130 sin = (struct sockaddr_in *)to; 1131 if (sin->sin_addr.s_addr == 1132 intf_addr->sin_addr.s_addr) { 1133 match = 1; 1134 break; 1135 } 1136 } 1137 #endif 1138 #ifdef INET6 1139 if (from->sa_family == AF_INET6) { 1140 struct sockaddr_in6 *intf_addr6; 1141 struct sockaddr_in6 *sin6; 1142 1143 sin6 = (struct sockaddr_in6 *) 1144 to; 1145 intf_addr6 = &laddr->ifa->address.sin6; 1146 1147 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1148 intf_addr6)) { 1149 match = 1; 1150 break; 1151 } 1152 } 1153 #endif 1154 } 1155 } 1156 if (match == 0) { 1157 /* This endpoint does not have this address */ 1158 SCTP_INP_RUNLOCK(inp); 1159 continue; 1160 } 1161 } 1162 /* 1163 * Ok if we hit here the ep has the address, does it hold 1164 * the tcb? 1165 */ 1166 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1167 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1168 if (stcb == NULL) { 1169 SCTP_INP_RUNLOCK(inp); 1170 continue; 1171 } 1172 SCTP_TCB_LOCK(stcb); 1173 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1174 SCTP_TCB_UNLOCK(stcb); 1175 SCTP_INP_RUNLOCK(inp); 1176 continue; 1177 } 1178 if (stcb->rport != rport) { 1179 /* remote port does not match. */ 1180 SCTP_TCB_UNLOCK(stcb); 1181 SCTP_INP_RUNLOCK(inp); 1182 continue; 1183 } 1184 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1185 SCTP_TCB_UNLOCK(stcb); 1186 SCTP_INP_RUNLOCK(inp); 1187 continue; 1188 } 1189 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1190 SCTP_TCB_UNLOCK(stcb); 1191 SCTP_INP_RUNLOCK(inp); 1192 continue; 1193 } 1194 /* Does this TCB have a matching address? */ 1195 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1196 1197 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1198 /* not the same family, can't be a match */ 1199 continue; 1200 } 1201 switch (from->sa_family) { 1202 #ifdef INET 1203 case AF_INET: 1204 { 1205 struct sockaddr_in *sin, *rsin; 1206 1207 sin = (struct sockaddr_in *)&net->ro._l_addr; 1208 rsin = (struct sockaddr_in *)from; 1209 if (sin->sin_addr.s_addr == 1210 rsin->sin_addr.s_addr) { 1211 /* found it */ 1212 if (netp != NULL) { 1213 *netp = net; 1214 } 1215 /* 1216 * Update the endpoint 1217 * pointer 1218 */ 1219 *inp_p = inp; 1220 SCTP_INP_RUNLOCK(inp); 1221 return (stcb); 1222 } 1223 break; 1224 } 1225 #endif 1226 #ifdef INET6 1227 case AF_INET6: 1228 { 1229 struct sockaddr_in6 *sin6, *rsin6; 1230 1231 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1232 rsin6 = (struct sockaddr_in6 *)from; 1233 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1234 rsin6)) { 1235 /* found it */ 1236 if (netp != NULL) { 1237 *netp = net; 1238 } 1239 /* 1240 * Update the endpoint 1241 * pointer 1242 */ 1243 *inp_p = inp; 1244 SCTP_INP_RUNLOCK(inp); 1245 return (stcb); 1246 } 1247 break; 1248 } 1249 #endif 1250 default: 1251 /* TSNH */ 1252 break; 1253 } 1254 } 1255 SCTP_TCB_UNLOCK(stcb); 1256 SCTP_INP_RUNLOCK(inp); 1257 } 1258 return (NULL); 1259 } 1260 1261 1262 /* 1263 * rules for use 1264 * 1265 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1266 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1267 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1268 * NULL. 1269 */ 1270 1271 struct sctp_tcb * 1272 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1273 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1274 { 1275 struct sctpasochead *head; 1276 struct sctp_inpcb *inp; 1277 struct sctp_tcb *stcb = NULL; 1278 struct sctp_nets *net; 1279 uint16_t rport; 1280 1281 inp = *inp_p; 1282 switch (remote->sa_family) { 1283 #ifdef INET 1284 case AF_INET: 1285 rport = (((struct sockaddr_in *)remote)->sin_port); 1286 break; 1287 #endif 1288 #ifdef INET6 1289 case AF_INET6: 1290 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1291 break; 1292 #endif 1293 default: 1294 return (NULL); 1295 } 1296 if (locked_tcb) { 1297 /* 1298 * UN-lock so we can do proper locking here this occurs when 1299 * called from load_addresses_from_init. 1300 */ 1301 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1302 SCTP_TCB_UNLOCK(locked_tcb); 1303 } 1304 SCTP_INP_INFO_RLOCK(); 1305 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1306 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1307 /*- 1308 * Now either this guy is our listener or it's the 1309 * connector. If it is the one that issued the connect, then 1310 * it's only chance is to be the first TCB in the list. If 1311 * it is the acceptor, then do the special_lookup to hash 1312 * and find the real inp. 1313 */ 1314 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1315 /* to is peer addr, from is my addr */ 1316 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1317 netp, inp->def_vrf_id); 1318 if ((stcb != NULL) && (locked_tcb == NULL)) { 1319 /* we have a locked tcb, lower refcount */ 1320 SCTP_INP_DECR_REF(inp); 1321 } 1322 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1323 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1324 SCTP_TCB_LOCK(locked_tcb); 1325 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1326 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1327 } 1328 SCTP_INP_INFO_RUNLOCK(); 1329 return (stcb); 1330 } else { 1331 SCTP_INP_WLOCK(inp); 1332 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1333 goto null_return; 1334 } 1335 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1336 if (stcb == NULL) { 1337 goto null_return; 1338 } 1339 SCTP_TCB_LOCK(stcb); 1340 1341 if (stcb->rport != rport) { 1342 /* remote port does not match. */ 1343 SCTP_TCB_UNLOCK(stcb); 1344 goto null_return; 1345 } 1346 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 /* now look at the list of remote addresses */ 1355 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1356 #ifdef INVARIANTS 1357 if (net == (TAILQ_NEXT(net, sctp_next))) { 1358 panic("Corrupt net list"); 1359 } 1360 #endif 1361 if (net->ro._l_addr.sa.sa_family != 1362 remote->sa_family) { 1363 /* not the same family */ 1364 continue; 1365 } 1366 switch (remote->sa_family) { 1367 #ifdef INET 1368 case AF_INET: 1369 { 1370 struct sockaddr_in *sin, 1371 *rsin; 1372 1373 sin = (struct sockaddr_in *) 1374 &net->ro._l_addr; 1375 rsin = (struct sockaddr_in *)remote; 1376 if (sin->sin_addr.s_addr == 1377 rsin->sin_addr.s_addr) { 1378 /* found it */ 1379 if (netp != NULL) { 1380 *netp = net; 1381 } 1382 if (locked_tcb == NULL) { 1383 SCTP_INP_DECR_REF(inp); 1384 } else if (locked_tcb != stcb) { 1385 SCTP_TCB_LOCK(locked_tcb); 1386 } 1387 if (locked_tcb) { 1388 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1389 } 1390 SCTP_INP_WUNLOCK(inp); 1391 SCTP_INP_INFO_RUNLOCK(); 1392 return (stcb); 1393 } 1394 break; 1395 } 1396 #endif 1397 #ifdef INET6 1398 case AF_INET6: 1399 { 1400 struct sockaddr_in6 *sin6, 1401 *rsin6; 1402 1403 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1404 rsin6 = (struct sockaddr_in6 *)remote; 1405 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1406 rsin6)) { 1407 /* found it */ 1408 if (netp != NULL) { 1409 *netp = net; 1410 } 1411 if (locked_tcb == NULL) { 1412 SCTP_INP_DECR_REF(inp); 1413 } else if (locked_tcb != stcb) { 1414 SCTP_TCB_LOCK(locked_tcb); 1415 } 1416 if (locked_tcb) { 1417 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1418 } 1419 SCTP_INP_WUNLOCK(inp); 1420 SCTP_INP_INFO_RUNLOCK(); 1421 return (stcb); 1422 } 1423 break; 1424 } 1425 #endif 1426 default: 1427 /* TSNH */ 1428 break; 1429 } 1430 } 1431 SCTP_TCB_UNLOCK(stcb); 1432 } 1433 } else { 1434 SCTP_INP_WLOCK(inp); 1435 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1436 goto null_return; 1437 } 1438 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1439 inp->sctp_hashmark)]; 1440 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1441 if (stcb->rport != rport) { 1442 /* remote port does not match */ 1443 continue; 1444 } 1445 SCTP_TCB_LOCK(stcb); 1446 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1447 SCTP_TCB_UNLOCK(stcb); 1448 continue; 1449 } 1450 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 /* now look at the list of remote addresses */ 1455 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1456 #ifdef INVARIANTS 1457 if (net == (TAILQ_NEXT(net, sctp_next))) { 1458 panic("Corrupt net list"); 1459 } 1460 #endif 1461 if (net->ro._l_addr.sa.sa_family != 1462 remote->sa_family) { 1463 /* not the same family */ 1464 continue; 1465 } 1466 switch (remote->sa_family) { 1467 #ifdef INET 1468 case AF_INET: 1469 { 1470 struct sockaddr_in *sin, 1471 *rsin; 1472 1473 sin = (struct sockaddr_in *) 1474 &net->ro._l_addr; 1475 rsin = (struct sockaddr_in *)remote; 1476 if (sin->sin_addr.s_addr == 1477 rsin->sin_addr.s_addr) { 1478 /* found it */ 1479 if (netp != NULL) { 1480 *netp = net; 1481 } 1482 if (locked_tcb == NULL) { 1483 SCTP_INP_DECR_REF(inp); 1484 } else if (locked_tcb != stcb) { 1485 SCTP_TCB_LOCK(locked_tcb); 1486 } 1487 if (locked_tcb) { 1488 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1489 } 1490 SCTP_INP_WUNLOCK(inp); 1491 SCTP_INP_INFO_RUNLOCK(); 1492 return (stcb); 1493 } 1494 break; 1495 } 1496 #endif 1497 #ifdef INET6 1498 case AF_INET6: 1499 { 1500 struct sockaddr_in6 *sin6, 1501 *rsin6; 1502 1503 sin6 = (struct sockaddr_in6 *) 1504 &net->ro._l_addr; 1505 rsin6 = (struct sockaddr_in6 *)remote; 1506 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1507 rsin6)) { 1508 /* found it */ 1509 if (netp != NULL) { 1510 *netp = net; 1511 } 1512 if (locked_tcb == NULL) { 1513 SCTP_INP_DECR_REF(inp); 1514 } else if (locked_tcb != stcb) { 1515 SCTP_TCB_LOCK(locked_tcb); 1516 } 1517 if (locked_tcb) { 1518 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1519 } 1520 SCTP_INP_WUNLOCK(inp); 1521 SCTP_INP_INFO_RUNLOCK(); 1522 return (stcb); 1523 } 1524 break; 1525 } 1526 #endif 1527 default: 1528 /* TSNH */ 1529 break; 1530 } 1531 } 1532 SCTP_TCB_UNLOCK(stcb); 1533 } 1534 } 1535 null_return: 1536 /* clean up for returning null */ 1537 if (locked_tcb) { 1538 SCTP_TCB_LOCK(locked_tcb); 1539 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1540 } 1541 SCTP_INP_WUNLOCK(inp); 1542 SCTP_INP_INFO_RUNLOCK(); 1543 /* not found */ 1544 return (NULL); 1545 } 1546 1547 1548 /* 1549 * Find an association for a specific endpoint using the association id given 1550 * out in the COMM_UP notification 1551 */ 1552 struct sctp_tcb * 1553 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1554 { 1555 /* 1556 * Use my the assoc_id to find a endpoint 1557 */ 1558 struct sctpasochead *head; 1559 struct sctp_tcb *stcb; 1560 uint32_t id; 1561 1562 if (inp == NULL) { 1563 SCTP_PRINTF("TSNH ep_associd\n"); 1564 return (NULL); 1565 } 1566 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1567 SCTP_PRINTF("TSNH ep_associd0\n"); 1568 return (NULL); 1569 } 1570 id = (uint32_t)asoc_id; 1571 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1572 if (head == NULL) { 1573 /* invalid id TSNH */ 1574 SCTP_PRINTF("TSNH ep_associd1\n"); 1575 return (NULL); 1576 } 1577 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1578 if (stcb->asoc.assoc_id == id) { 1579 if (inp != stcb->sctp_ep) { 1580 /* 1581 * some other guy has the same id active (id 1582 * collision ??). 1583 */ 1584 SCTP_PRINTF("TSNH ep_associd2\n"); 1585 continue; 1586 } 1587 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1588 continue; 1589 } 1590 if (want_lock) { 1591 SCTP_TCB_LOCK(stcb); 1592 } 1593 return (stcb); 1594 } 1595 } 1596 return (NULL); 1597 } 1598 1599 1600 struct sctp_tcb * 1601 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1602 { 1603 struct sctp_tcb *stcb; 1604 1605 SCTP_INP_RLOCK(inp); 1606 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1607 SCTP_INP_RUNLOCK(inp); 1608 return (stcb); 1609 } 1610 1611 1612 /* 1613 * Endpoint probe expects that the INP_INFO is locked. 1614 */ 1615 static struct sctp_inpcb * 1616 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1617 uint16_t lport, uint32_t vrf_id) 1618 { 1619 struct sctp_inpcb *inp; 1620 struct sctp_laddr *laddr; 1621 #ifdef INET 1622 struct sockaddr_in *sin; 1623 #endif 1624 #ifdef INET6 1625 struct sockaddr_in6 *sin6; 1626 struct sockaddr_in6 *intf_addr6; 1627 #endif 1628 int fnd; 1629 1630 #ifdef INET 1631 sin = NULL; 1632 #endif 1633 #ifdef INET6 1634 sin6 = NULL; 1635 #endif 1636 switch (nam->sa_family) { 1637 #ifdef INET 1638 case AF_INET: 1639 sin = (struct sockaddr_in *)nam; 1640 break; 1641 #endif 1642 #ifdef INET6 1643 case AF_INET6: 1644 sin6 = (struct sockaddr_in6 *)nam; 1645 break; 1646 #endif 1647 default: 1648 /* unsupported family */ 1649 return (NULL); 1650 } 1651 1652 if (head == NULL) 1653 return (NULL); 1654 1655 LIST_FOREACH(inp, head, sctp_hash) { 1656 SCTP_INP_RLOCK(inp); 1657 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1658 SCTP_INP_RUNLOCK(inp); 1659 continue; 1660 } 1661 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1662 (inp->sctp_lport == lport)) { 1663 /* got it */ 1664 switch (nam->sa_family) { 1665 #ifdef INET 1666 case AF_INET: 1667 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1668 SCTP_IPV6_V6ONLY(inp)) { 1669 /* 1670 * IPv4 on a IPv6 socket with ONLY 1671 * IPv6 set 1672 */ 1673 SCTP_INP_RUNLOCK(inp); 1674 continue; 1675 } 1676 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1677 &sin->sin_addr) != 0) { 1678 SCTP_INP_RUNLOCK(inp); 1679 continue; 1680 } 1681 break; 1682 #endif 1683 #ifdef INET6 1684 case AF_INET6: 1685 /* 1686 * A V6 address and the endpoint is NOT 1687 * bound V6 1688 */ 1689 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1690 SCTP_INP_RUNLOCK(inp); 1691 continue; 1692 } 1693 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1694 &sin6->sin6_addr) != 0) { 1695 SCTP_INP_RUNLOCK(inp); 1696 continue; 1697 } 1698 break; 1699 #endif 1700 default: 1701 break; 1702 } 1703 /* does a VRF id match? */ 1704 fnd = 0; 1705 if (inp->def_vrf_id == vrf_id) 1706 fnd = 1; 1707 1708 SCTP_INP_RUNLOCK(inp); 1709 if (!fnd) 1710 continue; 1711 return (inp); 1712 } 1713 SCTP_INP_RUNLOCK(inp); 1714 } 1715 switch (nam->sa_family) { 1716 #ifdef INET 1717 case AF_INET: 1718 if (sin->sin_addr.s_addr == INADDR_ANY) { 1719 /* Can't hunt for one that has no address specified */ 1720 return (NULL); 1721 } 1722 break; 1723 #endif 1724 #ifdef INET6 1725 case AF_INET6: 1726 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1727 /* Can't hunt for one that has no address specified */ 1728 return (NULL); 1729 } 1730 break; 1731 #endif 1732 default: 1733 break; 1734 } 1735 /* 1736 * ok, not bound to all so see if we can find a EP bound to this 1737 * address. 1738 */ 1739 LIST_FOREACH(inp, head, sctp_hash) { 1740 SCTP_INP_RLOCK(inp); 1741 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1742 SCTP_INP_RUNLOCK(inp); 1743 continue; 1744 } 1745 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1746 SCTP_INP_RUNLOCK(inp); 1747 continue; 1748 } 1749 /* 1750 * Ok this could be a likely candidate, look at all of its 1751 * addresses 1752 */ 1753 if (inp->sctp_lport != lport) { 1754 SCTP_INP_RUNLOCK(inp); 1755 continue; 1756 } 1757 /* does a VRF id match? */ 1758 fnd = 0; 1759 if (inp->def_vrf_id == vrf_id) 1760 fnd = 1; 1761 1762 if (!fnd) { 1763 SCTP_INP_RUNLOCK(inp); 1764 continue; 1765 } 1766 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1767 if (laddr->ifa == NULL) { 1768 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1769 __func__); 1770 continue; 1771 } 1772 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1773 (void *)laddr->ifa); 1774 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1775 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1776 continue; 1777 } 1778 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1779 /* possible, see if it matches */ 1780 switch (nam->sa_family) { 1781 #ifdef INET 1782 case AF_INET: 1783 if (sin->sin_addr.s_addr == 1784 laddr->ifa->address.sin.sin_addr.s_addr) { 1785 SCTP_INP_RUNLOCK(inp); 1786 return (inp); 1787 } 1788 break; 1789 #endif 1790 #ifdef INET6 1791 case AF_INET6: 1792 intf_addr6 = &laddr->ifa->address.sin6; 1793 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1794 intf_addr6)) { 1795 SCTP_INP_RUNLOCK(inp); 1796 return (inp); 1797 } 1798 break; 1799 #endif 1800 } 1801 } 1802 } 1803 SCTP_INP_RUNLOCK(inp); 1804 } 1805 return (NULL); 1806 } 1807 1808 1809 static struct sctp_inpcb * 1810 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1811 { 1812 struct sctppcbhead *head; 1813 struct sctp_inpcb *t_inp; 1814 int fnd; 1815 1816 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1817 SCTP_BASE_INFO(hashmark))]; 1818 LIST_FOREACH(t_inp, head, sctp_hash) { 1819 if (t_inp->sctp_lport != lport) { 1820 continue; 1821 } 1822 /* is it in the VRF in question */ 1823 fnd = 0; 1824 if (t_inp->def_vrf_id == vrf_id) 1825 fnd = 1; 1826 if (!fnd) 1827 continue; 1828 1829 /* This one is in use. */ 1830 /* check the v6/v4 binding issue */ 1831 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1832 SCTP_IPV6_V6ONLY(t_inp)) { 1833 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1834 /* collision in V6 space */ 1835 return (t_inp); 1836 } else { 1837 /* inp is BOUND_V4 no conflict */ 1838 continue; 1839 } 1840 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1841 /* t_inp is bound v4 and v6, conflict always */ 1842 return (t_inp); 1843 } else { 1844 /* t_inp is bound only V4 */ 1845 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1846 SCTP_IPV6_V6ONLY(inp)) { 1847 /* no conflict */ 1848 continue; 1849 } 1850 /* else fall through to conflict */ 1851 } 1852 return (t_inp); 1853 } 1854 return (NULL); 1855 } 1856 1857 1858 int 1859 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1860 { 1861 /* For 1-2-1 with port reuse */ 1862 struct sctppcbhead *head; 1863 struct sctp_inpcb *tinp, *ninp; 1864 1865 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1866 /* only works with port reuse on */ 1867 return (-1); 1868 } 1869 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1870 return (0); 1871 } 1872 SCTP_INP_RUNLOCK(inp); 1873 SCTP_INP_INFO_WLOCK(); 1874 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1875 SCTP_BASE_INFO(hashmark))]; 1876 /* Kick out all non-listeners to the TCP hash */ 1877 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1878 if (tinp->sctp_lport != inp->sctp_lport) { 1879 continue; 1880 } 1881 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1882 continue; 1883 } 1884 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1885 continue; 1886 } 1887 if (tinp->sctp_socket->so_qlimit) { 1888 continue; 1889 } 1890 SCTP_INP_WLOCK(tinp); 1891 LIST_REMOVE(tinp, sctp_hash); 1892 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1893 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1894 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1895 SCTP_INP_WUNLOCK(tinp); 1896 } 1897 SCTP_INP_WLOCK(inp); 1898 /* Pull from where he was */ 1899 LIST_REMOVE(inp, sctp_hash); 1900 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1901 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1902 LIST_INSERT_HEAD(head, inp, sctp_hash); 1903 SCTP_INP_WUNLOCK(inp); 1904 SCTP_INP_RLOCK(inp); 1905 SCTP_INP_INFO_WUNLOCK(); 1906 return (0); 1907 } 1908 1909 1910 struct sctp_inpcb * 1911 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1912 uint32_t vrf_id) 1913 { 1914 /* 1915 * First we check the hash table to see if someone has this port 1916 * bound with just the port. 1917 */ 1918 struct sctp_inpcb *inp; 1919 struct sctppcbhead *head; 1920 int lport; 1921 unsigned int i; 1922 #ifdef INET 1923 struct sockaddr_in *sin; 1924 #endif 1925 #ifdef INET6 1926 struct sockaddr_in6 *sin6; 1927 #endif 1928 1929 switch (nam->sa_family) { 1930 #ifdef INET 1931 case AF_INET: 1932 sin = (struct sockaddr_in *)nam; 1933 lport = sin->sin_port; 1934 break; 1935 #endif 1936 #ifdef INET6 1937 case AF_INET6: 1938 sin6 = (struct sockaddr_in6 *)nam; 1939 lport = sin6->sin6_port; 1940 break; 1941 #endif 1942 default: 1943 return (NULL); 1944 } 1945 /* 1946 * I could cheat here and just cast to one of the types but we will 1947 * do it right. It also provides the check against an Unsupported 1948 * type too. 1949 */ 1950 /* Find the head of the ALLADDR chain */ 1951 if (have_lock == 0) { 1952 SCTP_INP_INFO_RLOCK(); 1953 } 1954 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1955 SCTP_BASE_INFO(hashmark))]; 1956 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1957 1958 /* 1959 * If the TCP model exists it could be that the main listening 1960 * endpoint is gone but there still exists a connected socket for 1961 * this guy. If so we can return the first one that we find. This 1962 * may NOT be the correct one so the caller should be wary on the 1963 * returned INP. Currently the only caller that sets find_tcp_pool 1964 * is in bindx where we are verifying that a user CAN bind the 1965 * address. He either has bound it already, or someone else has, or 1966 * its open to bind, so this is good enough. 1967 */ 1968 if (inp == NULL && find_tcp_pool) { 1969 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1970 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1971 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1972 if (inp) { 1973 break; 1974 } 1975 } 1976 } 1977 if (inp) { 1978 SCTP_INP_INCR_REF(inp); 1979 } 1980 if (have_lock == 0) { 1981 SCTP_INP_INFO_RUNLOCK(); 1982 } 1983 return (inp); 1984 } 1985 1986 1987 /* 1988 * Find an association for an endpoint with the pointer to whom you want to 1989 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1990 * need to change the *to to some other struct like a mbuf... 1991 */ 1992 struct sctp_tcb * 1993 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1994 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1995 uint32_t vrf_id) 1996 { 1997 struct sctp_inpcb *inp = NULL; 1998 struct sctp_tcb *stcb; 1999 2000 SCTP_INP_INFO_RLOCK(); 2001 if (find_tcp_pool) { 2002 if (inp_p != NULL) { 2003 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2004 vrf_id); 2005 } else { 2006 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2007 vrf_id); 2008 } 2009 if (stcb != NULL) { 2010 SCTP_INP_INFO_RUNLOCK(); 2011 return (stcb); 2012 } 2013 } 2014 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2015 if (inp_p != NULL) { 2016 *inp_p = inp; 2017 } 2018 SCTP_INP_INFO_RUNLOCK(); 2019 if (inp == NULL) { 2020 return (NULL); 2021 } 2022 /* 2023 * ok, we have an endpoint, now lets find the assoc for it (if any) 2024 * we now place the source address or from in the to of the find 2025 * endpoint call. Since in reality this chain is used from the 2026 * inbound packet side. 2027 */ 2028 if (inp_p != NULL) { 2029 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2030 NULL); 2031 } else { 2032 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2033 NULL); 2034 } 2035 return (stcb); 2036 } 2037 2038 2039 /* 2040 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2041 * find all addresses that the sender has specified in any address list. Each 2042 * address will be used to lookup the TCB and see if one exits. 2043 */ 2044 static struct sctp_tcb * 2045 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2046 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2047 struct sockaddr *dst) 2048 { 2049 struct sctp_paramhdr *phdr, parm_buf; 2050 #if defined(INET) || defined(INET6) 2051 struct sctp_tcb *stcb; 2052 uint16_t ptype; 2053 #endif 2054 uint16_t plen; 2055 #ifdef INET 2056 struct sockaddr_in sin4; 2057 #endif 2058 #ifdef INET6 2059 struct sockaddr_in6 sin6; 2060 #endif 2061 2062 #ifdef INET 2063 memset(&sin4, 0, sizeof(sin4)); 2064 sin4.sin_len = sizeof(sin4); 2065 sin4.sin_family = AF_INET; 2066 sin4.sin_port = sh->src_port; 2067 #endif 2068 #ifdef INET6 2069 memset(&sin6, 0, sizeof(sin6)); 2070 sin6.sin6_len = sizeof(sin6); 2071 sin6.sin6_family = AF_INET6; 2072 sin6.sin6_port = sh->src_port; 2073 #endif 2074 2075 offset += sizeof(struct sctp_init_chunk); 2076 2077 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2078 while (phdr != NULL) { 2079 /* now we must see if we want the parameter */ 2080 #if defined(INET) || defined(INET6) 2081 ptype = ntohs(phdr->param_type); 2082 #endif 2083 plen = ntohs(phdr->param_length); 2084 if (plen == 0) { 2085 break; 2086 } 2087 #ifdef INET 2088 if (ptype == SCTP_IPV4_ADDRESS && 2089 plen == sizeof(struct sctp_ipv4addr_param)) { 2090 /* Get the rest of the address */ 2091 struct sctp_ipv4addr_param ip4_parm, *p4; 2092 2093 phdr = sctp_get_next_param(m, offset, 2094 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2095 if (phdr == NULL) { 2096 return (NULL); 2097 } 2098 p4 = (struct sctp_ipv4addr_param *)phdr; 2099 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2100 /* look it up */ 2101 stcb = sctp_findassociation_ep_addr(inp_p, 2102 (struct sockaddr *)&sin4, netp, dst, NULL); 2103 if (stcb != NULL) { 2104 return (stcb); 2105 } 2106 } 2107 #endif 2108 #ifdef INET6 2109 if (ptype == SCTP_IPV6_ADDRESS && 2110 plen == sizeof(struct sctp_ipv6addr_param)) { 2111 /* Get the rest of the address */ 2112 struct sctp_ipv6addr_param ip6_parm, *p6; 2113 2114 phdr = sctp_get_next_param(m, offset, 2115 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2116 if (phdr == NULL) { 2117 return (NULL); 2118 } 2119 p6 = (struct sctp_ipv6addr_param *)phdr; 2120 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2121 /* look it up */ 2122 stcb = sctp_findassociation_ep_addr(inp_p, 2123 (struct sockaddr *)&sin6, netp, dst, NULL); 2124 if (stcb != NULL) { 2125 return (stcb); 2126 } 2127 } 2128 #endif 2129 offset += SCTP_SIZE32(plen); 2130 phdr = sctp_get_next_param(m, offset, &parm_buf, 2131 sizeof(parm_buf)); 2132 } 2133 return (NULL); 2134 } 2135 2136 static struct sctp_tcb * 2137 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2138 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2139 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2140 { 2141 /* 2142 * Use my vtag to hash. If we find it we then verify the source addr 2143 * is in the assoc. If all goes well we save a bit on rec of a 2144 * packet. 2145 */ 2146 struct sctpasochead *head; 2147 struct sctp_nets *net; 2148 struct sctp_tcb *stcb; 2149 2150 SCTP_INP_INFO_RLOCK(); 2151 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2152 SCTP_BASE_INFO(hashasocmark))]; 2153 LIST_FOREACH(stcb, head, sctp_asocs) { 2154 SCTP_INP_RLOCK(stcb->sctp_ep); 2155 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2156 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2157 continue; 2158 } 2159 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2160 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2161 continue; 2162 } 2163 SCTP_TCB_LOCK(stcb); 2164 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2165 if (stcb->asoc.my_vtag == vtag) { 2166 /* candidate */ 2167 if (stcb->rport != rport) { 2168 SCTP_TCB_UNLOCK(stcb); 2169 continue; 2170 } 2171 if (stcb->sctp_ep->sctp_lport != lport) { 2172 SCTP_TCB_UNLOCK(stcb); 2173 continue; 2174 } 2175 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2176 SCTP_TCB_UNLOCK(stcb); 2177 continue; 2178 } 2179 /* RRS:Need toaddr check here */ 2180 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2181 /* Endpoint does not own this address */ 2182 SCTP_TCB_UNLOCK(stcb); 2183 continue; 2184 } 2185 if (remote_tag) { 2186 /* 2187 * If we have both vtags that's all we match 2188 * on 2189 */ 2190 if (stcb->asoc.peer_vtag == remote_tag) { 2191 /* 2192 * If both tags match we consider it 2193 * conclusive and check NO 2194 * source/destination addresses 2195 */ 2196 goto conclusive; 2197 } 2198 } 2199 if (skip_src_check) { 2200 conclusive: 2201 if (from) { 2202 *netp = sctp_findnet(stcb, from); 2203 } else { 2204 *netp = NULL; /* unknown */ 2205 } 2206 if (inp_p) 2207 *inp_p = stcb->sctp_ep; 2208 SCTP_INP_INFO_RUNLOCK(); 2209 return (stcb); 2210 } 2211 net = sctp_findnet(stcb, from); 2212 if (net) { 2213 /* yep its him. */ 2214 *netp = net; 2215 SCTP_STAT_INCR(sctps_vtagexpress); 2216 *inp_p = stcb->sctp_ep; 2217 SCTP_INP_INFO_RUNLOCK(); 2218 return (stcb); 2219 } else { 2220 /* 2221 * not him, this should only happen in rare 2222 * cases so I peg it. 2223 */ 2224 SCTP_STAT_INCR(sctps_vtagbogus); 2225 } 2226 } 2227 SCTP_TCB_UNLOCK(stcb); 2228 } 2229 SCTP_INP_INFO_RUNLOCK(); 2230 return (NULL); 2231 } 2232 2233 2234 /* 2235 * Find an association with the pointer to the inbound IP packet. This can be 2236 * a IPv4 or IPv6 packet. 2237 */ 2238 struct sctp_tcb * 2239 sctp_findassociation_addr(struct mbuf *m, int offset, 2240 struct sockaddr *src, struct sockaddr *dst, 2241 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2242 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2243 { 2244 struct sctp_tcb *stcb; 2245 struct sctp_inpcb *inp; 2246 2247 if (sh->v_tag) { 2248 /* we only go down this path if vtag is non-zero */ 2249 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2250 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2251 if (stcb) { 2252 return (stcb); 2253 } 2254 } 2255 if (inp_p) { 2256 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2257 1, vrf_id); 2258 inp = *inp_p; 2259 } else { 2260 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2261 1, vrf_id); 2262 } 2263 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2264 if (stcb == NULL && inp) { 2265 /* Found a EP but not this address */ 2266 if ((ch->chunk_type == SCTP_INITIATION) || 2267 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2268 /*- 2269 * special hook, we do NOT return linp or an 2270 * association that is linked to an existing 2271 * association that is under the TCP pool (i.e. no 2272 * listener exists). The endpoint finding routine 2273 * will always find a listener before examining the 2274 * TCP pool. 2275 */ 2276 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2277 if (inp_p) { 2278 *inp_p = NULL; 2279 } 2280 return (NULL); 2281 } 2282 stcb = sctp_findassociation_special_addr(m, 2283 offset, sh, &inp, netp, dst); 2284 if (inp_p != NULL) { 2285 *inp_p = inp; 2286 } 2287 } 2288 } 2289 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2290 return (stcb); 2291 } 2292 2293 /* 2294 * lookup an association by an ASCONF lookup address. 2295 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2296 */ 2297 struct sctp_tcb * 2298 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2299 struct sockaddr *dst, struct sctphdr *sh, 2300 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2301 { 2302 struct sctp_tcb *stcb; 2303 union sctp_sockstore remote_store; 2304 struct sctp_paramhdr parm_buf, *phdr; 2305 int ptype; 2306 int zero_address = 0; 2307 #ifdef INET 2308 struct sockaddr_in *sin; 2309 #endif 2310 #ifdef INET6 2311 struct sockaddr_in6 *sin6; 2312 #endif 2313 2314 memset(&remote_store, 0, sizeof(remote_store)); 2315 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2316 &parm_buf, sizeof(struct sctp_paramhdr)); 2317 if (phdr == NULL) { 2318 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2319 __func__); 2320 return NULL; 2321 } 2322 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2323 /* get the correlation address */ 2324 switch (ptype) { 2325 #ifdef INET6 2326 case SCTP_IPV6_ADDRESS: 2327 { 2328 /* ipv6 address param */ 2329 struct sctp_ipv6addr_param *p6, p6_buf; 2330 2331 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2332 return NULL; 2333 } 2334 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2335 offset + sizeof(struct sctp_asconf_chunk), 2336 &p6_buf.ph, sizeof(*p6)); 2337 if (p6 == NULL) { 2338 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2339 __func__); 2340 return (NULL); 2341 } 2342 sin6 = &remote_store.sin6; 2343 sin6->sin6_family = AF_INET6; 2344 sin6->sin6_len = sizeof(*sin6); 2345 sin6->sin6_port = sh->src_port; 2346 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2347 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2348 zero_address = 1; 2349 break; 2350 } 2351 #endif 2352 #ifdef INET 2353 case SCTP_IPV4_ADDRESS: 2354 { 2355 /* ipv4 address param */ 2356 struct sctp_ipv4addr_param *p4, p4_buf; 2357 2358 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2359 return NULL; 2360 } 2361 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2362 offset + sizeof(struct sctp_asconf_chunk), 2363 &p4_buf.ph, sizeof(*p4)); 2364 if (p4 == NULL) { 2365 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2366 __func__); 2367 return (NULL); 2368 } 2369 sin = &remote_store.sin; 2370 sin->sin_family = AF_INET; 2371 sin->sin_len = sizeof(*sin); 2372 sin->sin_port = sh->src_port; 2373 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2374 if (sin->sin_addr.s_addr == INADDR_ANY) 2375 zero_address = 1; 2376 break; 2377 } 2378 #endif 2379 default: 2380 /* invalid address param type */ 2381 return NULL; 2382 } 2383 2384 if (zero_address) { 2385 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2386 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2387 if (stcb != NULL) { 2388 SCTP_INP_DECR_REF(*inp_p); 2389 } 2390 } else { 2391 stcb = sctp_findassociation_ep_addr(inp_p, 2392 &remote_store.sa, netp, 2393 dst, NULL); 2394 } 2395 return (stcb); 2396 } 2397 2398 2399 /* 2400 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2401 * addresses. This way if we don't get a bind we by default pick a ephemeral 2402 * port with all addresses bound. 2403 */ 2404 int 2405 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2406 { 2407 /* 2408 * we get called when a new endpoint starts up. We need to allocate 2409 * the sctp_inpcb structure from the zone and init it. Mark it as 2410 * unbound and find a port that we can use as an ephemeral with 2411 * INADDR_ANY. If the user binds later no problem we can then add in 2412 * the specific addresses. And setup the default parameters for the 2413 * EP. 2414 */ 2415 int i, error; 2416 struct sctp_inpcb *inp; 2417 struct sctp_pcb *m; 2418 struct timeval time; 2419 sctp_sharedkey_t *null_key; 2420 2421 error = 0; 2422 2423 SCTP_INP_INFO_WLOCK(); 2424 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2425 if (inp == NULL) { 2426 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2427 SCTP_INP_INFO_WUNLOCK(); 2428 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2429 return (ENOBUFS); 2430 } 2431 /* zap it */ 2432 bzero(inp, sizeof(*inp)); 2433 2434 /* bump generations */ 2435 /* setup socket pointers */ 2436 inp->sctp_socket = so; 2437 inp->ip_inp.inp.inp_socket = so; 2438 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2439 #ifdef INET6 2440 if (INP_SOCKAF(so) == AF_INET6) { 2441 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2442 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2443 } 2444 if (MODULE_GLOBAL(ip6_v6only)) { 2445 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2446 } 2447 } 2448 #endif 2449 inp->sctp_associd_counter = 1; 2450 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2451 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2452 inp->max_cwnd = 0; 2453 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2454 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2455 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2456 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2457 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2458 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2459 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2460 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2461 inp->idata_supported = 0; 2462 2463 inp->fibnum = so->so_fibnum; 2464 /* init the small hash table we use to track asocid <-> tcb */ 2465 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2466 if (inp->sctp_asocidhash == NULL) { 2467 crfree(inp->ip_inp.inp.inp_cred); 2468 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2469 SCTP_INP_INFO_WUNLOCK(); 2470 return (ENOBUFS); 2471 } 2472 #ifdef IPSEC 2473 error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp); 2474 if (error != 0) { 2475 crfree(inp->ip_inp.inp.inp_cred); 2476 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2477 SCTP_INP_INFO_WUNLOCK(); 2478 return error; 2479 } 2480 #endif /* IPSEC */ 2481 SCTP_INCR_EP_COUNT(); 2482 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2483 SCTP_INP_INFO_WUNLOCK(); 2484 2485 so->so_pcb = (caddr_t)inp; 2486 2487 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2488 /* UDP style socket */ 2489 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2490 SCTP_PCB_FLAGS_UNBOUND); 2491 /* Be sure it is NON-BLOCKING IO for UDP */ 2492 /* SCTP_SET_SO_NBIO(so); */ 2493 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2494 /* TCP style socket */ 2495 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2496 SCTP_PCB_FLAGS_UNBOUND); 2497 /* Be sure we have blocking IO by default */ 2498 SCTP_CLEAR_SO_NBIO(so); 2499 } else { 2500 /* 2501 * unsupported socket type (RAW, etc)- in case we missed it 2502 * in protosw 2503 */ 2504 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2505 so->so_pcb = NULL; 2506 crfree(inp->ip_inp.inp.inp_cred); 2507 #ifdef IPSEC 2508 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2509 #endif 2510 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2511 return (EOPNOTSUPP); 2512 } 2513 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2514 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2515 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2516 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2517 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2518 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2519 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2520 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2521 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2522 } 2523 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2524 &inp->sctp_hashmark); 2525 if (inp->sctp_tcbhash == NULL) { 2526 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2527 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2528 so->so_pcb = NULL; 2529 crfree(inp->ip_inp.inp.inp_cred); 2530 #ifdef IPSEC 2531 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2532 #endif 2533 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2534 return (ENOBUFS); 2535 } 2536 inp->def_vrf_id = vrf_id; 2537 2538 SCTP_INP_INFO_WLOCK(); 2539 SCTP_INP_LOCK_INIT(inp); 2540 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2541 SCTP_INP_READ_INIT(inp); 2542 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2543 /* lock the new ep */ 2544 SCTP_INP_WLOCK(inp); 2545 2546 /* add it to the info area */ 2547 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2548 SCTP_INP_INFO_WUNLOCK(); 2549 2550 TAILQ_INIT(&inp->read_queue); 2551 LIST_INIT(&inp->sctp_addr_list); 2552 2553 LIST_INIT(&inp->sctp_asoc_list); 2554 2555 #ifdef SCTP_TRACK_FREED_ASOCS 2556 /* TEMP CODE */ 2557 LIST_INIT(&inp->sctp_asoc_free_list); 2558 #endif 2559 /* Init the timer structure for signature change */ 2560 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2561 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2562 2563 /* now init the actual endpoint default data */ 2564 m = &inp->sctp_ep; 2565 2566 /* setup the base timeout information */ 2567 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2568 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2569 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2570 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2571 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2572 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2573 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2574 /* all max/min max are in ms */ 2575 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2576 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2577 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2578 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2579 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2580 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2581 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2582 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2583 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2584 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2585 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2586 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2587 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2588 2589 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2590 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2591 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2592 /* number of streams to pre-open on a association */ 2593 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2594 2595 /* Add adaptation cookie */ 2596 m->adaptation_layer_indicator = 0; 2597 m->adaptation_layer_indicator_provided = 0; 2598 2599 /* seed random number generator */ 2600 m->random_counter = 1; 2601 m->store_at = SCTP_SIGNATURE_SIZE; 2602 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2603 sctp_fill_random_store(m); 2604 2605 /* Minimum cookie size */ 2606 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2607 sizeof(struct sctp_state_cookie); 2608 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2609 2610 /* Setup the initial secret */ 2611 (void)SCTP_GETTIME_TIMEVAL(&time); 2612 m->time_of_secret_change = time.tv_sec; 2613 2614 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2615 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2616 } 2617 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2618 2619 /* How long is a cookie good for ? */ 2620 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2621 /* 2622 * Initialize authentication parameters 2623 */ 2624 m->local_hmacs = sctp_default_supported_hmaclist(); 2625 m->local_auth_chunks = sctp_alloc_chunklist(); 2626 if (inp->asconf_supported) { 2627 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2628 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2629 } 2630 m->default_dscp = 0; 2631 #ifdef INET6 2632 m->default_flowlabel = 0; 2633 #endif 2634 m->port = 0; /* encapsulation disabled by default */ 2635 LIST_INIT(&m->shared_keys); 2636 /* add default NULL key as key id 0 */ 2637 null_key = sctp_alloc_sharedkey(); 2638 sctp_insert_sharedkey(&m->shared_keys, null_key); 2639 SCTP_INP_WUNLOCK(inp); 2640 #ifdef SCTP_LOG_CLOSING 2641 sctp_log_closing(inp, NULL, 12); 2642 #endif 2643 return (error); 2644 } 2645 2646 2647 void 2648 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2649 struct sctp_tcb *stcb) 2650 { 2651 struct sctp_nets *net; 2652 uint16_t lport, rport; 2653 struct sctppcbhead *head; 2654 struct sctp_laddr *laddr, *oladdr; 2655 2656 atomic_add_int(&stcb->asoc.refcnt, 1); 2657 SCTP_TCB_UNLOCK(stcb); 2658 SCTP_INP_INFO_WLOCK(); 2659 SCTP_INP_WLOCK(old_inp); 2660 SCTP_INP_WLOCK(new_inp); 2661 SCTP_TCB_LOCK(stcb); 2662 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2663 2664 new_inp->sctp_ep.time_of_secret_change = 2665 old_inp->sctp_ep.time_of_secret_change; 2666 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2667 sizeof(old_inp->sctp_ep.secret_key)); 2668 new_inp->sctp_ep.current_secret_number = 2669 old_inp->sctp_ep.current_secret_number; 2670 new_inp->sctp_ep.last_secret_number = 2671 old_inp->sctp_ep.last_secret_number; 2672 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2673 2674 /* make it so new data pours into the new socket */ 2675 stcb->sctp_socket = new_inp->sctp_socket; 2676 stcb->sctp_ep = new_inp; 2677 2678 /* Copy the port across */ 2679 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2680 rport = stcb->rport; 2681 /* Pull the tcb from the old association */ 2682 LIST_REMOVE(stcb, sctp_tcbhash); 2683 LIST_REMOVE(stcb, sctp_tcblist); 2684 if (stcb->asoc.in_asocid_hash) { 2685 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2686 } 2687 /* Now insert the new_inp into the TCP connected hash */ 2688 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2689 2690 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2691 /* Its safe to access */ 2692 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2693 2694 /* Now move the tcb into the endpoint list */ 2695 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2696 /* 2697 * Question, do we even need to worry about the ep-hash since we 2698 * only have one connection? Probably not :> so lets get rid of it 2699 * and not suck up any kernel memory in that. 2700 */ 2701 if (stcb->asoc.in_asocid_hash) { 2702 struct sctpasochead *lhd; 2703 2704 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2705 new_inp->hashasocidmark)]; 2706 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2707 } 2708 /* Ok. Let's restart timer. */ 2709 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2710 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2711 stcb, net); 2712 } 2713 2714 SCTP_INP_INFO_WUNLOCK(); 2715 if (new_inp->sctp_tcbhash != NULL) { 2716 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2717 new_inp->sctp_tcbhash = NULL; 2718 } 2719 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2720 /* Subset bound, so copy in the laddr list from the old_inp */ 2721 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2722 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2723 if (laddr == NULL) { 2724 /* 2725 * Gak, what can we do? This assoc is really 2726 * HOSED. We probably should send an abort 2727 * here. 2728 */ 2729 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2730 continue; 2731 } 2732 SCTP_INCR_LADDR_COUNT(); 2733 bzero(laddr, sizeof(*laddr)); 2734 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2735 laddr->ifa = oladdr->ifa; 2736 atomic_add_int(&laddr->ifa->refcount, 1); 2737 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2738 sctp_nxt_addr); 2739 new_inp->laddr_count++; 2740 if (oladdr == stcb->asoc.last_used_address) { 2741 stcb->asoc.last_used_address = laddr; 2742 } 2743 } 2744 } 2745 /* 2746 * Now any running timers need to be adjusted since we really don't 2747 * care if they are running or not just blast in the new_inp into 2748 * all of them. 2749 */ 2750 2751 stcb->asoc.dack_timer.ep = (void *)new_inp; 2752 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2753 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2754 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2755 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2756 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2757 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2758 /* now what about the nets? */ 2759 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2760 net->pmtu_timer.ep = (void *)new_inp; 2761 net->hb_timer.ep = (void *)new_inp; 2762 net->rxt_timer.ep = (void *)new_inp; 2763 } 2764 SCTP_INP_WUNLOCK(new_inp); 2765 SCTP_INP_WUNLOCK(old_inp); 2766 } 2767 2768 /* 2769 * insert an laddr entry with the given ifa for the desired list 2770 */ 2771 static int 2772 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2773 { 2774 struct sctp_laddr *laddr; 2775 2776 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2777 if (laddr == NULL) { 2778 /* out of memory? */ 2779 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2780 return (EINVAL); 2781 } 2782 SCTP_INCR_LADDR_COUNT(); 2783 bzero(laddr, sizeof(*laddr)); 2784 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2785 laddr->ifa = ifa; 2786 laddr->action = act; 2787 atomic_add_int(&ifa->refcount, 1); 2788 /* insert it */ 2789 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2790 2791 return (0); 2792 } 2793 2794 /* 2795 * Remove an laddr entry from the local address list (on an assoc) 2796 */ 2797 static void 2798 sctp_remove_laddr(struct sctp_laddr *laddr) 2799 { 2800 2801 /* remove from the list */ 2802 LIST_REMOVE(laddr, sctp_nxt_addr); 2803 sctp_free_ifa(laddr->ifa); 2804 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2805 SCTP_DECR_LADDR_COUNT(); 2806 } 2807 2808 2809 2810 /* sctp_ifap is used to bypass normal local address validation checks */ 2811 int 2812 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2813 struct sctp_ifa *sctp_ifap, struct thread *p) 2814 { 2815 /* bind a ep to a socket address */ 2816 struct sctppcbhead *head; 2817 struct sctp_inpcb *inp, *inp_tmp; 2818 struct inpcb *ip_inp; 2819 int port_reuse_active = 0; 2820 int bindall; 2821 uint16_t lport; 2822 int error; 2823 uint32_t vrf_id; 2824 2825 lport = 0; 2826 bindall = 1; 2827 inp = (struct sctp_inpcb *)so->so_pcb; 2828 ip_inp = (struct inpcb *)so->so_pcb; 2829 #ifdef SCTP_DEBUG 2830 if (addr) { 2831 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2832 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2833 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2834 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2835 } 2836 #endif 2837 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2838 /* already did a bind, subsequent binds NOT allowed ! */ 2839 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2840 return (EINVAL); 2841 } 2842 #ifdef INVARIANTS 2843 if (p == NULL) 2844 panic("null proc/thread"); 2845 #endif 2846 if (addr != NULL) { 2847 switch (addr->sa_family) { 2848 #ifdef INET 2849 case AF_INET: 2850 { 2851 struct sockaddr_in *sin; 2852 2853 /* IPV6_V6ONLY socket? */ 2854 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2855 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2856 return (EINVAL); 2857 } 2858 if (addr->sa_len != sizeof(*sin)) { 2859 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2860 return (EINVAL); 2861 } 2862 sin = (struct sockaddr_in *)addr; 2863 lport = sin->sin_port; 2864 /* 2865 * For LOOPBACK the prison_local_ip4() call 2866 * will transmute the ip address to the 2867 * proper value. 2868 */ 2869 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2870 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2871 return (error); 2872 } 2873 if (sin->sin_addr.s_addr != INADDR_ANY) { 2874 bindall = 0; 2875 } 2876 break; 2877 } 2878 #endif 2879 #ifdef INET6 2880 case AF_INET6: 2881 { 2882 /* 2883 * Only for pure IPv6 Address. (No IPv4 2884 * Mapped!) 2885 */ 2886 struct sockaddr_in6 *sin6; 2887 2888 sin6 = (struct sockaddr_in6 *)addr; 2889 2890 if (addr->sa_len != sizeof(*sin6)) { 2891 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2892 return (EINVAL); 2893 } 2894 lport = sin6->sin6_port; 2895 /* 2896 * For LOOPBACK the prison_local_ip6() call 2897 * will transmute the ipv6 address to the 2898 * proper value. 2899 */ 2900 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2901 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2902 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2903 return (error); 2904 } 2905 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2906 bindall = 0; 2907 /* KAME hack: embed scopeid */ 2908 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2909 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2910 return (EINVAL); 2911 } 2912 } 2913 /* this must be cleared for ifa_ifwithaddr() */ 2914 sin6->sin6_scope_id = 0; 2915 break; 2916 } 2917 #endif 2918 default: 2919 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2920 return (EAFNOSUPPORT); 2921 } 2922 } 2923 SCTP_INP_INFO_WLOCK(); 2924 SCTP_INP_WLOCK(inp); 2925 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2926 vrf_id = inp->def_vrf_id; 2927 2928 /* increase our count due to the unlock we do */ 2929 SCTP_INP_INCR_REF(inp); 2930 if (lport) { 2931 /* 2932 * Did the caller specify a port? if so we must see if an ep 2933 * already has this one bound. 2934 */ 2935 /* got to be root to get at low ports */ 2936 if (ntohs(lport) < IPPORT_RESERVED) { 2937 if (p && (error = 2938 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2939 )) { 2940 SCTP_INP_DECR_REF(inp); 2941 SCTP_INP_WUNLOCK(inp); 2942 SCTP_INP_INFO_WUNLOCK(); 2943 return (error); 2944 } 2945 } 2946 SCTP_INP_WUNLOCK(inp); 2947 if (bindall) { 2948 vrf_id = inp->def_vrf_id; 2949 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2950 if (inp_tmp != NULL) { 2951 /* 2952 * lock guy returned and lower count note 2953 * that we are not bound so inp_tmp should 2954 * NEVER be inp. And it is this inp 2955 * (inp_tmp) that gets the reference bump, 2956 * so we must lower it. 2957 */ 2958 SCTP_INP_DECR_REF(inp_tmp); 2959 /* unlock info */ 2960 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2961 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2962 /* 2963 * Ok, must be one-2-one and 2964 * allowing port re-use 2965 */ 2966 port_reuse_active = 1; 2967 goto continue_anyway; 2968 } 2969 SCTP_INP_DECR_REF(inp); 2970 SCTP_INP_INFO_WUNLOCK(); 2971 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2972 return (EADDRINUSE); 2973 } 2974 } else { 2975 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2976 if (inp_tmp != NULL) { 2977 /* 2978 * lock guy returned and lower count note 2979 * that we are not bound so inp_tmp should 2980 * NEVER be inp. And it is this inp 2981 * (inp_tmp) that gets the reference bump, 2982 * so we must lower it. 2983 */ 2984 SCTP_INP_DECR_REF(inp_tmp); 2985 /* unlock info */ 2986 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2987 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2988 /* 2989 * Ok, must be one-2-one and 2990 * allowing port re-use 2991 */ 2992 port_reuse_active = 1; 2993 goto continue_anyway; 2994 } 2995 SCTP_INP_DECR_REF(inp); 2996 SCTP_INP_INFO_WUNLOCK(); 2997 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2998 return (EADDRINUSE); 2999 } 3000 } 3001 continue_anyway: 3002 SCTP_INP_WLOCK(inp); 3003 if (bindall) { 3004 /* verify that no lport is not used by a singleton */ 3005 if ((port_reuse_active == 0) && 3006 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3007 /* Sorry someone already has this one bound */ 3008 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3009 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3010 port_reuse_active = 1; 3011 } else { 3012 SCTP_INP_DECR_REF(inp); 3013 SCTP_INP_WUNLOCK(inp); 3014 SCTP_INP_INFO_WUNLOCK(); 3015 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3016 return (EADDRINUSE); 3017 } 3018 } 3019 } 3020 } else { 3021 uint16_t first, last, candidate; 3022 uint16_t count; 3023 int done; 3024 3025 if (ip_inp->inp_flags & INP_HIGHPORT) { 3026 first = MODULE_GLOBAL(ipport_hifirstauto); 3027 last = MODULE_GLOBAL(ipport_hilastauto); 3028 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3029 if (p && (error = 3030 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3031 )) { 3032 SCTP_INP_DECR_REF(inp); 3033 SCTP_INP_WUNLOCK(inp); 3034 SCTP_INP_INFO_WUNLOCK(); 3035 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3036 return (error); 3037 } 3038 first = MODULE_GLOBAL(ipport_lowfirstauto); 3039 last = MODULE_GLOBAL(ipport_lowlastauto); 3040 } else { 3041 first = MODULE_GLOBAL(ipport_firstauto); 3042 last = MODULE_GLOBAL(ipport_lastauto); 3043 } 3044 if (first > last) { 3045 uint16_t temp; 3046 3047 temp = first; 3048 first = last; 3049 last = temp; 3050 } 3051 count = last - first + 1; /* number of candidates */ 3052 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3053 3054 done = 0; 3055 while (!done) { 3056 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3057 done = 1; 3058 } 3059 if (!done) { 3060 if (--count == 0) { 3061 SCTP_INP_DECR_REF(inp); 3062 SCTP_INP_WUNLOCK(inp); 3063 SCTP_INP_INFO_WUNLOCK(); 3064 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3065 return (EADDRINUSE); 3066 } 3067 if (candidate == last) 3068 candidate = first; 3069 else 3070 candidate = candidate + 1; 3071 } 3072 } 3073 lport = htons(candidate); 3074 } 3075 SCTP_INP_DECR_REF(inp); 3076 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3077 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3078 /* 3079 * this really should not happen. The guy did a non-blocking 3080 * bind and then did a close at the same time. 3081 */ 3082 SCTP_INP_WUNLOCK(inp); 3083 SCTP_INP_INFO_WUNLOCK(); 3084 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3085 return (EINVAL); 3086 } 3087 /* ok we look clear to give out this port, so lets setup the binding */ 3088 if (bindall) { 3089 /* binding to all addresses, so just set in the proper flags */ 3090 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3091 /* set the automatic addr changes from kernel flag */ 3092 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3093 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3094 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3095 } else { 3096 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3097 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3098 } 3099 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3100 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3101 } else { 3102 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3103 } 3104 /* 3105 * set the automatic mobility_base from kernel flag (by 3106 * micchie) 3107 */ 3108 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3109 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3110 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3111 } else { 3112 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3113 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3114 } 3115 /* 3116 * set the automatic mobility_fasthandoff from kernel flag 3117 * (by micchie) 3118 */ 3119 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3120 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3121 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3122 } else { 3123 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3124 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3125 } 3126 } else { 3127 /* 3128 * bind specific, make sure flags is off and add a new 3129 * address structure to the sctp_addr_list inside the ep 3130 * structure. 3131 * 3132 * We will need to allocate one and insert it at the head. 3133 * The socketopt call can just insert new addresses in there 3134 * as well. It will also have to do the embed scope kame 3135 * hack too (before adding). 3136 */ 3137 struct sctp_ifa *ifa; 3138 union sctp_sockstore store; 3139 3140 memset(&store, 0, sizeof(store)); 3141 switch (addr->sa_family) { 3142 #ifdef INET 3143 case AF_INET: 3144 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3145 store.sin.sin_port = 0; 3146 break; 3147 #endif 3148 #ifdef INET6 3149 case AF_INET6: 3150 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3151 store.sin6.sin6_port = 0; 3152 break; 3153 #endif 3154 default: 3155 break; 3156 } 3157 /* 3158 * first find the interface with the bound address need to 3159 * zero out the port to find the address! yuck! can't do 3160 * this earlier since need port for sctp_pcb_findep() 3161 */ 3162 if (sctp_ifap != NULL) { 3163 ifa = sctp_ifap; 3164 } else { 3165 /* 3166 * Note for BSD we hit here always other O/S's will 3167 * pass things in via the sctp_ifap argument 3168 * (Panda). 3169 */ 3170 ifa = sctp_find_ifa_by_addr(&store.sa, 3171 vrf_id, SCTP_ADDR_NOT_LOCKED); 3172 } 3173 if (ifa == NULL) { 3174 /* Can't find an interface with that address */ 3175 SCTP_INP_WUNLOCK(inp); 3176 SCTP_INP_INFO_WUNLOCK(); 3177 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3178 return (EADDRNOTAVAIL); 3179 } 3180 #ifdef INET6 3181 if (addr->sa_family == AF_INET6) { 3182 /* GAK, more FIXME IFA lock? */ 3183 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3184 /* Can't bind a non-existent addr. */ 3185 SCTP_INP_WUNLOCK(inp); 3186 SCTP_INP_INFO_WUNLOCK(); 3187 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3188 return (EINVAL); 3189 } 3190 } 3191 #endif 3192 /* we're not bound all */ 3193 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3194 /* allow bindx() to send ASCONF's for binding changes */ 3195 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3196 /* clear automatic addr changes from kernel flag */ 3197 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3198 3199 /* add this address to the endpoint list */ 3200 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3201 if (error != 0) { 3202 SCTP_INP_WUNLOCK(inp); 3203 SCTP_INP_INFO_WUNLOCK(); 3204 return (error); 3205 } 3206 inp->laddr_count++; 3207 } 3208 /* find the bucket */ 3209 if (port_reuse_active) { 3210 /* Put it into tcp 1-2-1 hash */ 3211 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3212 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3213 } else { 3214 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3215 } 3216 /* put it in the bucket */ 3217 LIST_INSERT_HEAD(head, inp, sctp_hash); 3218 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3219 (void *)head, ntohs(lport), port_reuse_active); 3220 /* set in the port */ 3221 inp->sctp_lport = lport; 3222 3223 /* turn off just the unbound flag */ 3224 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3225 SCTP_INP_WUNLOCK(inp); 3226 SCTP_INP_INFO_WUNLOCK(); 3227 return (0); 3228 } 3229 3230 3231 static void 3232 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3233 { 3234 struct sctp_iterator *it, *nit; 3235 3236 /* 3237 * We enter with the only the ITERATOR_LOCK in place and a write 3238 * lock on the inp_info stuff. 3239 */ 3240 it = sctp_it_ctl.cur_it; 3241 if (it && (it->vn != curvnet)) { 3242 /* Its not looking at our VNET */ 3243 return; 3244 } 3245 if (it && (it->inp == inp)) { 3246 /* 3247 * This is tricky and we hold the iterator lock, but when it 3248 * returns and gets the lock (when we release it) the 3249 * iterator will try to operate on inp. We need to stop that 3250 * from happening. But of course the iterator has a 3251 * reference on the stcb and inp. We can mark it and it will 3252 * stop. 3253 * 3254 * If its a single iterator situation, we set the end 3255 * iterator flag. Otherwise we set the iterator to go to the 3256 * next inp. 3257 * 3258 */ 3259 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3260 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3261 } else { 3262 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3263 } 3264 } 3265 /* 3266 * Now go through and remove any single reference to our inp that 3267 * may be still pending on the list 3268 */ 3269 SCTP_IPI_ITERATOR_WQ_LOCK(); 3270 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3271 if (it->vn != curvnet) { 3272 continue; 3273 } 3274 if (it->inp == inp) { 3275 /* This one points to me is it inp specific? */ 3276 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3277 /* Remove and free this one */ 3278 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3279 it, sctp_nxt_itr); 3280 if (it->function_atend != NULL) { 3281 (*it->function_atend) (it->pointer, it->val); 3282 } 3283 SCTP_FREE(it, SCTP_M_ITER); 3284 } else { 3285 it->inp = LIST_NEXT(it->inp, sctp_list); 3286 if (it->inp) { 3287 SCTP_INP_INCR_REF(it->inp); 3288 } 3289 } 3290 /* 3291 * When its put in the refcnt is incremented so decr 3292 * it 3293 */ 3294 SCTP_INP_DECR_REF(inp); 3295 } 3296 } 3297 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3298 } 3299 3300 /* release sctp_inpcb unbind the port */ 3301 void 3302 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3303 { 3304 /* 3305 * Here we free a endpoint. We must find it (if it is in the Hash 3306 * table) and remove it from there. Then we must also find it in the 3307 * overall list and remove it from there. After all removals are 3308 * complete then any timer has to be stopped. Then start the actual 3309 * freeing. a) Any local lists. b) Any associations. c) The hash of 3310 * all associations. d) finally the ep itself. 3311 */ 3312 struct sctp_tcb *asoc, *nasoc; 3313 struct sctp_laddr *laddr, *nladdr; 3314 struct inpcb *ip_pcb; 3315 struct socket *so; 3316 int being_refed = 0; 3317 struct sctp_queued_to_read *sq, *nsq; 3318 int cnt; 3319 sctp_sharedkey_t *shared_key, *nshared_key; 3320 3321 3322 #ifdef SCTP_LOG_CLOSING 3323 sctp_log_closing(inp, NULL, 0); 3324 #endif 3325 SCTP_ITERATOR_LOCK(); 3326 /* mark any iterators on the list or being processed */ 3327 sctp_iterator_inp_being_freed(inp); 3328 SCTP_ITERATOR_UNLOCK(); 3329 so = inp->sctp_socket; 3330 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3331 /* been here before.. eeks.. get out of here */ 3332 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3333 #ifdef SCTP_LOG_CLOSING 3334 sctp_log_closing(inp, NULL, 1); 3335 #endif 3336 return; 3337 } 3338 SCTP_ASOC_CREATE_LOCK(inp); 3339 SCTP_INP_INFO_WLOCK(); 3340 3341 SCTP_INP_WLOCK(inp); 3342 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3343 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3344 /* socket is gone, so no more wakeups allowed */ 3345 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3346 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3347 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3348 3349 } 3350 /* First time through we have the socket lock, after that no more. */ 3351 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3352 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3353 3354 if (inp->control) { 3355 sctp_m_freem(inp->control); 3356 inp->control = NULL; 3357 } 3358 if (inp->pkt) { 3359 sctp_m_freem(inp->pkt); 3360 inp->pkt = NULL; 3361 } 3362 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3363 * here but I will be nice :> (i.e. 3364 * ip_pcb = ep;) */ 3365 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3366 int cnt_in_sd; 3367 3368 cnt_in_sd = 0; 3369 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3370 SCTP_TCB_LOCK(asoc); 3371 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3372 /* Skip guys being freed */ 3373 cnt_in_sd++; 3374 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3375 /* 3376 * Special case - we did not start a 3377 * kill timer on the asoc due to it 3378 * was not closed. So go ahead and 3379 * start it now. 3380 */ 3381 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3382 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3383 } 3384 SCTP_TCB_UNLOCK(asoc); 3385 continue; 3386 } 3387 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3388 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3389 (asoc->asoc.total_output_queue_size == 0)) { 3390 /* 3391 * If we have data in queue, we don't want 3392 * to just free since the app may have done, 3393 * send()/close or connect/send/close. And 3394 * it wants the data to get across first. 3395 */ 3396 /* Just abandon things in the front states */ 3397 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3398 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3399 cnt_in_sd++; 3400 } 3401 continue; 3402 } 3403 /* Disconnect the socket please */ 3404 asoc->sctp_socket = NULL; 3405 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3406 if ((asoc->asoc.size_on_reasm_queue > 0) || 3407 (asoc->asoc.control_pdapi) || 3408 (asoc->asoc.size_on_all_streams > 0) || 3409 (so && (so->so_rcv.sb_cc > 0))) { 3410 /* Left with Data unread */ 3411 struct mbuf *op_err; 3412 3413 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3414 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3415 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3416 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3417 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3418 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3419 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3420 } 3421 if (sctp_free_assoc(inp, asoc, 3422 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3423 cnt_in_sd++; 3424 } 3425 continue; 3426 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3427 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3428 (asoc->asoc.stream_queue_cnt == 0)) { 3429 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3430 goto abort_anyway; 3431 } 3432 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3433 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3434 struct sctp_nets *netp; 3435 3436 /* 3437 * there is nothing queued to send, 3438 * so I send shutdown 3439 */ 3440 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3441 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3442 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3443 } 3444 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3445 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3446 sctp_stop_timers_for_shutdown(asoc); 3447 if (asoc->asoc.alternate) { 3448 netp = asoc->asoc.alternate; 3449 } else { 3450 netp = asoc->asoc.primary_destination; 3451 } 3452 sctp_send_shutdown(asoc, netp); 3453 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3454 netp); 3455 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3456 asoc->asoc.primary_destination); 3457 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3458 } 3459 } else { 3460 /* mark into shutdown pending */ 3461 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3462 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3463 asoc->asoc.primary_destination); 3464 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3465 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3466 } 3467 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3468 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3469 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3470 struct mbuf *op_err; 3471 3472 abort_anyway: 3473 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3474 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3475 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3476 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3477 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3478 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3479 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3480 } 3481 if (sctp_free_assoc(inp, asoc, 3482 SCTP_PCBFREE_NOFORCE, 3483 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3484 cnt_in_sd++; 3485 } 3486 continue; 3487 } else { 3488 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3489 } 3490 } 3491 cnt_in_sd++; 3492 SCTP_TCB_UNLOCK(asoc); 3493 } 3494 /* now is there some left in our SHUTDOWN state? */ 3495 if (cnt_in_sd) { 3496 #ifdef SCTP_LOG_CLOSING 3497 sctp_log_closing(inp, NULL, 2); 3498 #endif 3499 inp->sctp_socket = NULL; 3500 SCTP_INP_WUNLOCK(inp); 3501 SCTP_ASOC_CREATE_UNLOCK(inp); 3502 SCTP_INP_INFO_WUNLOCK(); 3503 return; 3504 } 3505 } 3506 inp->sctp_socket = NULL; 3507 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3508 SCTP_PCB_FLAGS_UNBOUND) { 3509 /* 3510 * ok, this guy has been bound. It's port is somewhere in 3511 * the SCTP_BASE_INFO(hash table). Remove it! 3512 */ 3513 LIST_REMOVE(inp, sctp_hash); 3514 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3515 } 3516 /* 3517 * If there is a timer running to kill us, forget it, since it may 3518 * have a contest on the INP lock.. which would cause us to die ... 3519 */ 3520 cnt = 0; 3521 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3522 SCTP_TCB_LOCK(asoc); 3523 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3524 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3525 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3526 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3527 } 3528 cnt++; 3529 SCTP_TCB_UNLOCK(asoc); 3530 continue; 3531 } 3532 /* Free associations that are NOT killing us */ 3533 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3534 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3535 struct mbuf *op_err; 3536 3537 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3538 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3539 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3540 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3541 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3542 cnt++; 3543 SCTP_TCB_UNLOCK(asoc); 3544 continue; 3545 } 3546 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3547 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3548 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3549 } 3550 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3551 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3552 cnt++; 3553 } 3554 } 3555 if (cnt) { 3556 /* Ok we have someone out there that will kill us */ 3557 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3558 #ifdef SCTP_LOG_CLOSING 3559 sctp_log_closing(inp, NULL, 3); 3560 #endif 3561 SCTP_INP_WUNLOCK(inp); 3562 SCTP_ASOC_CREATE_UNLOCK(inp); 3563 SCTP_INP_INFO_WUNLOCK(); 3564 return; 3565 } 3566 if (SCTP_INP_LOCK_CONTENDED(inp)) 3567 being_refed++; 3568 if (SCTP_INP_READ_CONTENDED(inp)) 3569 being_refed++; 3570 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3571 being_refed++; 3572 3573 if ((inp->refcount) || 3574 (being_refed) || 3575 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3576 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3577 #ifdef SCTP_LOG_CLOSING 3578 sctp_log_closing(inp, NULL, 4); 3579 #endif 3580 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3581 SCTP_INP_WUNLOCK(inp); 3582 SCTP_ASOC_CREATE_UNLOCK(inp); 3583 SCTP_INP_INFO_WUNLOCK(); 3584 return; 3585 } 3586 inp->sctp_ep.signature_change.type = 0; 3587 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3588 /* 3589 * Remove it from the list .. last thing we need a lock for. 3590 */ 3591 LIST_REMOVE(inp, sctp_list); 3592 SCTP_INP_WUNLOCK(inp); 3593 SCTP_ASOC_CREATE_UNLOCK(inp); 3594 SCTP_INP_INFO_WUNLOCK(); 3595 /* 3596 * Now we release all locks. Since this INP cannot be found anymore 3597 * except possibly by the kill timer that might be running. We call 3598 * the drain function here. It should hit the case were it sees the 3599 * ACTIVE flag cleared and exit out freeing us to proceed and 3600 * destroy everything. 3601 */ 3602 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3603 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3604 } else { 3605 /* Probably un-needed */ 3606 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3607 } 3608 3609 #ifdef SCTP_LOG_CLOSING 3610 sctp_log_closing(inp, NULL, 5); 3611 #endif 3612 3613 3614 if ((inp->sctp_asocidhash) != NULL) { 3615 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3616 inp->sctp_asocidhash = NULL; 3617 } 3618 /* sa_ignore FREED_MEMORY */ 3619 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3620 /* Its only abandoned if it had data left */ 3621 if (sq->length) 3622 SCTP_STAT_INCR(sctps_left_abandon); 3623 3624 TAILQ_REMOVE(&inp->read_queue, sq, next); 3625 sctp_free_remote_addr(sq->whoFrom); 3626 if (so) 3627 so->so_rcv.sb_cc -= sq->length; 3628 if (sq->data) { 3629 sctp_m_freem(sq->data); 3630 sq->data = NULL; 3631 } 3632 /* 3633 * no need to free the net count, since at this point all 3634 * assoc's are gone. 3635 */ 3636 sctp_free_a_readq(NULL, sq); 3637 } 3638 /* Now the sctp_pcb things */ 3639 /* 3640 * free each asoc if it is not already closed/free. we can't use the 3641 * macro here since le_next will get freed as part of the 3642 * sctp_free_assoc() call. 3643 */ 3644 #ifdef IPSEC 3645 ipsec_delete_pcbpolicy(ip_pcb); 3646 #endif 3647 if (ip_pcb->inp_options) { 3648 (void)sctp_m_free(ip_pcb->inp_options); 3649 ip_pcb->inp_options = 0; 3650 } 3651 #ifdef INET6 3652 if (ip_pcb->inp_vflag & INP_IPV6) { 3653 struct in6pcb *in6p; 3654 3655 in6p = (struct in6pcb *)inp; 3656 ip6_freepcbopts(in6p->in6p_outputopts); 3657 } 3658 #endif /* INET6 */ 3659 ip_pcb->inp_vflag = 0; 3660 /* free up authentication fields */ 3661 if (inp->sctp_ep.local_auth_chunks != NULL) 3662 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3663 if (inp->sctp_ep.local_hmacs != NULL) 3664 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3665 3666 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3667 LIST_REMOVE(shared_key, next); 3668 sctp_free_sharedkey(shared_key); 3669 /* sa_ignore FREED_MEMORY */ 3670 } 3671 3672 /* 3673 * if we have an address list the following will free the list of 3674 * ifaddr's that are set into this ep. Again macro limitations here, 3675 * since the LIST_FOREACH could be a bad idea. 3676 */ 3677 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3678 sctp_remove_laddr(laddr); 3679 } 3680 3681 #ifdef SCTP_TRACK_FREED_ASOCS 3682 /* TEMP CODE */ 3683 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3684 LIST_REMOVE(asoc, sctp_tcblist); 3685 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3686 SCTP_DECR_ASOC_COUNT(); 3687 } 3688 /* *** END TEMP CODE *** */ 3689 #endif 3690 /* Now lets see about freeing the EP hash table. */ 3691 if (inp->sctp_tcbhash != NULL) { 3692 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3693 inp->sctp_tcbhash = NULL; 3694 } 3695 /* Now we must put the ep memory back into the zone pool */ 3696 crfree(inp->ip_inp.inp.inp_cred); 3697 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3698 SCTP_INP_LOCK_DESTROY(inp); 3699 SCTP_INP_READ_DESTROY(inp); 3700 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3701 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3702 SCTP_DECR_EP_COUNT(); 3703 } 3704 3705 3706 struct sctp_nets * 3707 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3708 { 3709 struct sctp_nets *net; 3710 3711 /* locate the address */ 3712 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3713 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3714 return (net); 3715 } 3716 return (NULL); 3717 } 3718 3719 3720 int 3721 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3722 { 3723 struct sctp_ifa *sctp_ifa; 3724 3725 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3726 if (sctp_ifa) { 3727 return (1); 3728 } else { 3729 return (0); 3730 } 3731 } 3732 3733 /* 3734 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3735 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3736 * stats of stuff. 3737 */ 3738 int 3739 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3740 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3741 { 3742 /* 3743 * The following is redundant to the same lines in the 3744 * sctp_aloc_assoc() but is needed since others call the add address 3745 * function 3746 */ 3747 struct sctp_nets *net, *netfirst; 3748 int addr_inscope; 3749 3750 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3751 from); 3752 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3753 3754 netfirst = sctp_findnet(stcb, newaddr); 3755 if (netfirst) { 3756 /* 3757 * Lie and return ok, we don't want to make the association 3758 * go away for this behavior. It will happen in the TCP 3759 * model in a connected socket. It does not reach the hash 3760 * table until after the association is built so it can't be 3761 * found. Mark as reachable, since the initial creation will 3762 * have been cleared and the NOT_IN_ASSOC flag will have 3763 * been added... and we don't want to end up removing it 3764 * back out. 3765 */ 3766 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3767 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3768 SCTP_ADDR_UNCONFIRMED); 3769 } else { 3770 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3771 } 3772 3773 return (0); 3774 } 3775 addr_inscope = 1; 3776 switch (newaddr->sa_family) { 3777 #ifdef INET 3778 case AF_INET: 3779 { 3780 struct sockaddr_in *sin; 3781 3782 sin = (struct sockaddr_in *)newaddr; 3783 if (sin->sin_addr.s_addr == 0) { 3784 /* Invalid address */ 3785 return (-1); 3786 } 3787 /* zero out the bzero area */ 3788 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3789 3790 /* assure len is set */ 3791 sin->sin_len = sizeof(struct sockaddr_in); 3792 if (set_scope) { 3793 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3794 stcb->asoc.scope.ipv4_local_scope = 1; 3795 } 3796 } else { 3797 /* Validate the address is in scope */ 3798 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3799 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3800 addr_inscope = 0; 3801 } 3802 } 3803 break; 3804 } 3805 #endif 3806 #ifdef INET6 3807 case AF_INET6: 3808 { 3809 struct sockaddr_in6 *sin6; 3810 3811 sin6 = (struct sockaddr_in6 *)newaddr; 3812 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3813 /* Invalid address */ 3814 return (-1); 3815 } 3816 /* assure len is set */ 3817 sin6->sin6_len = sizeof(struct sockaddr_in6); 3818 if (set_scope) { 3819 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3820 stcb->asoc.scope.loopback_scope = 1; 3821 stcb->asoc.scope.local_scope = 0; 3822 stcb->asoc.scope.ipv4_local_scope = 1; 3823 stcb->asoc.scope.site_scope = 1; 3824 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3825 /* 3826 * If the new destination is a 3827 * LINK_LOCAL we must have common 3828 * site scope. Don't set the local 3829 * scope since we may not share all 3830 * links, only loopback can do this. 3831 * Links on the local network would 3832 * also be on our private network 3833 * for v4 too. 3834 */ 3835 stcb->asoc.scope.ipv4_local_scope = 1; 3836 stcb->asoc.scope.site_scope = 1; 3837 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3838 /* 3839 * If the new destination is 3840 * SITE_LOCAL then we must have site 3841 * scope in common. 3842 */ 3843 stcb->asoc.scope.site_scope = 1; 3844 } 3845 } else { 3846 /* Validate the address is in scope */ 3847 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3848 (stcb->asoc.scope.loopback_scope == 0)) { 3849 addr_inscope = 0; 3850 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3851 (stcb->asoc.scope.local_scope == 0)) { 3852 addr_inscope = 0; 3853 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3854 (stcb->asoc.scope.site_scope == 0)) { 3855 addr_inscope = 0; 3856 } 3857 } 3858 break; 3859 } 3860 #endif 3861 default: 3862 /* not supported family type */ 3863 return (-1); 3864 } 3865 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3866 if (net == NULL) { 3867 return (-1); 3868 } 3869 SCTP_INCR_RADDR_COUNT(); 3870 bzero(net, sizeof(struct sctp_nets)); 3871 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3872 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3873 switch (newaddr->sa_family) { 3874 #ifdef INET 3875 case AF_INET: 3876 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3877 break; 3878 #endif 3879 #ifdef INET6 3880 case AF_INET6: 3881 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3882 break; 3883 #endif 3884 default: 3885 break; 3886 } 3887 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3888 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3889 stcb->asoc.scope.loopback_scope = 1; 3890 stcb->asoc.scope.ipv4_local_scope = 1; 3891 stcb->asoc.scope.local_scope = 0; 3892 stcb->asoc.scope.site_scope = 1; 3893 addr_inscope = 1; 3894 } 3895 net->failure_threshold = stcb->asoc.def_net_failure; 3896 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3897 if (addr_inscope == 0) { 3898 net->dest_state = (SCTP_ADDR_REACHABLE | 3899 SCTP_ADDR_OUT_OF_SCOPE); 3900 } else { 3901 if (from == SCTP_ADDR_IS_CONFIRMED) 3902 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3903 net->dest_state = SCTP_ADDR_REACHABLE; 3904 else 3905 net->dest_state = SCTP_ADDR_REACHABLE | 3906 SCTP_ADDR_UNCONFIRMED; 3907 } 3908 /* 3909 * We set this to 0, the timer code knows that this means its an 3910 * initial value 3911 */ 3912 net->rto_needed = 1; 3913 net->RTO = 0; 3914 net->RTO_measured = 0; 3915 stcb->asoc.numnets++; 3916 net->ref_count = 1; 3917 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3918 net->port = port; 3919 net->dscp = stcb->asoc.default_dscp; 3920 #ifdef INET6 3921 net->flowlabel = stcb->asoc.default_flowlabel; 3922 #endif 3923 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3924 net->dest_state |= SCTP_ADDR_NOHB; 3925 } else { 3926 net->dest_state &= ~SCTP_ADDR_NOHB; 3927 } 3928 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3929 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3930 } else { 3931 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3932 } 3933 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3934 /* Init the timer structure */ 3935 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3936 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3937 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3938 3939 /* Now generate a route for this guy */ 3940 #ifdef INET6 3941 /* KAME hack: embed scopeid */ 3942 if (newaddr->sa_family == AF_INET6) { 3943 struct sockaddr_in6 *sin6; 3944 3945 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3946 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3947 sin6->sin6_scope_id = 0; 3948 } 3949 #endif 3950 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3951 stcb->asoc.vrf_id, 3952 stcb->sctp_ep->fibnum); 3953 3954 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3955 /* Get source address */ 3956 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3957 stcb, 3958 (sctp_route_t *)&net->ro, 3959 net, 3960 0, 3961 stcb->asoc.vrf_id); 3962 if (net->ro._s_addr != NULL) { 3963 net->src_addr_selected = 1; 3964 /* Now get the interface MTU */ 3965 if (net->ro._s_addr->ifn_p != NULL) { 3966 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3967 } 3968 } else { 3969 net->src_addr_selected = 0; 3970 } 3971 if (net->mtu > 0) { 3972 uint32_t rmtu; 3973 3974 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3975 if (rmtu == 0) { 3976 /* 3977 * Start things off to match mtu of 3978 * interface please. 3979 */ 3980 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3981 net->ro.ro_rt, net->mtu); 3982 } else { 3983 /* 3984 * we take the route mtu over the interface, 3985 * since the route may be leading out the 3986 * loopback, or a different interface. 3987 */ 3988 net->mtu = rmtu; 3989 } 3990 } 3991 } else { 3992 net->src_addr_selected = 0; 3993 } 3994 if (net->mtu == 0) { 3995 switch (newaddr->sa_family) { 3996 #ifdef INET 3997 case AF_INET: 3998 net->mtu = SCTP_DEFAULT_MTU; 3999 break; 4000 #endif 4001 #ifdef INET6 4002 case AF_INET6: 4003 net->mtu = 1280; 4004 break; 4005 #endif 4006 default: 4007 break; 4008 } 4009 } 4010 #if defined(INET) || defined(INET6) 4011 if (net->port) { 4012 net->mtu -= (uint32_t)sizeof(struct udphdr); 4013 } 4014 #endif 4015 if (from == SCTP_ALLOC_ASOC) { 4016 stcb->asoc.smallest_mtu = net->mtu; 4017 } 4018 if (stcb->asoc.smallest_mtu > net->mtu) { 4019 sctp_pathmtu_adjustment(stcb, net->mtu); 4020 } 4021 #ifdef INET6 4022 if (newaddr->sa_family == AF_INET6) { 4023 struct sockaddr_in6 *sin6; 4024 4025 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4026 (void)sa6_recoverscope(sin6); 4027 } 4028 #endif 4029 4030 /* JRS - Use the congestion control given in the CC module */ 4031 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4032 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4033 4034 /* 4035 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4036 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4037 */ 4038 net->find_pseudo_cumack = 1; 4039 net->find_rtx_pseudo_cumack = 1; 4040 /* Choose an initial flowid. */ 4041 net->flowid = stcb->asoc.my_vtag ^ 4042 ntohs(stcb->rport) ^ 4043 ntohs(stcb->sctp_ep->sctp_lport); 4044 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4045 if (netp) { 4046 *netp = net; 4047 } 4048 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4049 if (net->ro.ro_rt == NULL) { 4050 /* Since we have no route put it at the back */ 4051 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4052 } else if (netfirst == NULL) { 4053 /* We are the first one in the pool. */ 4054 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4055 } else if (netfirst->ro.ro_rt == NULL) { 4056 /* 4057 * First one has NO route. Place this one ahead of the first 4058 * one. 4059 */ 4060 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4061 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4062 /* 4063 * This one has a different interface than the one at the 4064 * top of the list. Place it ahead. 4065 */ 4066 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4067 } else { 4068 /* 4069 * Ok we have the same interface as the first one. Move 4070 * forward until we find either a) one with a NULL route... 4071 * insert ahead of that b) one with a different ifp.. insert 4072 * after that. c) end of the list.. insert at the tail. 4073 */ 4074 struct sctp_nets *netlook; 4075 4076 do { 4077 netlook = TAILQ_NEXT(netfirst, sctp_next); 4078 if (netlook == NULL) { 4079 /* End of the list */ 4080 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4081 break; 4082 } else if (netlook->ro.ro_rt == NULL) { 4083 /* next one has NO route */ 4084 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4085 break; 4086 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4087 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4088 net, sctp_next); 4089 break; 4090 } 4091 /* Shift forward */ 4092 netfirst = netlook; 4093 } while (netlook != NULL); 4094 } 4095 4096 /* got to have a primary set */ 4097 if (stcb->asoc.primary_destination == 0) { 4098 stcb->asoc.primary_destination = net; 4099 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4100 (net->ro.ro_rt) && 4101 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4102 /* No route to current primary adopt new primary */ 4103 stcb->asoc.primary_destination = net; 4104 } 4105 /* Validate primary is first */ 4106 net = TAILQ_FIRST(&stcb->asoc.nets); 4107 if ((net != stcb->asoc.primary_destination) && 4108 (stcb->asoc.primary_destination)) { 4109 /* 4110 * first one on the list is NOT the primary sctp_cmpaddr() 4111 * is much more efficient if the primary is the first on the 4112 * list, make it so. 4113 */ 4114 TAILQ_REMOVE(&stcb->asoc.nets, 4115 stcb->asoc.primary_destination, sctp_next); 4116 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4117 stcb->asoc.primary_destination, sctp_next); 4118 } 4119 return (0); 4120 } 4121 4122 4123 static uint32_t 4124 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4125 { 4126 uint32_t id; 4127 struct sctpasochead *head; 4128 struct sctp_tcb *lstcb; 4129 4130 SCTP_INP_WLOCK(inp); 4131 try_again: 4132 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4133 /* TSNH */ 4134 SCTP_INP_WUNLOCK(inp); 4135 return (0); 4136 } 4137 /* 4138 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4139 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4140 */ 4141 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4142 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4143 } 4144 id = inp->sctp_associd_counter; 4145 inp->sctp_associd_counter++; 4146 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4147 if (lstcb) { 4148 goto try_again; 4149 } 4150 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4151 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4152 stcb->asoc.in_asocid_hash = 1; 4153 SCTP_INP_WUNLOCK(inp); 4154 return id; 4155 } 4156 4157 /* 4158 * allocate an association and add it to the endpoint. The caller must be 4159 * careful to add all additional addresses once they are know right away or 4160 * else the assoc will be may experience a blackout scenario. 4161 */ 4162 struct sctp_tcb * 4163 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4164 int *error, uint32_t override_tag, uint32_t vrf_id, 4165 uint16_t o_streams, uint16_t port, 4166 struct thread *p 4167 ) 4168 { 4169 /* note the p argument is only valid in unbound sockets */ 4170 4171 struct sctp_tcb *stcb; 4172 struct sctp_association *asoc; 4173 struct sctpasochead *head; 4174 uint16_t rport; 4175 int err; 4176 4177 /* 4178 * Assumption made here: Caller has done a 4179 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4180 * address does not exist already. 4181 */ 4182 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4183 /* Hit max assoc, sorry no more */ 4184 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4185 *error = ENOBUFS; 4186 return (NULL); 4187 } 4188 if (firstaddr == NULL) { 4189 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4190 *error = EINVAL; 4191 return (NULL); 4192 } 4193 SCTP_INP_RLOCK(inp); 4194 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4195 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4196 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4197 /* 4198 * If its in the TCP pool, its NOT allowed to create an 4199 * association. The parent listener needs to call 4200 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4201 * off, or connected one does this.. its an error. 4202 */ 4203 SCTP_INP_RUNLOCK(inp); 4204 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4205 *error = EINVAL; 4206 return (NULL); 4207 } 4208 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4209 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4210 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4211 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4212 SCTP_INP_RUNLOCK(inp); 4213 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4214 *error = EINVAL; 4215 return (NULL); 4216 } 4217 } 4218 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4219 #ifdef SCTP_DEBUG 4220 if (firstaddr) { 4221 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4222 switch (firstaddr->sa_family) { 4223 #ifdef INET 4224 case AF_INET: 4225 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4226 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4227 break; 4228 #endif 4229 #ifdef INET6 4230 case AF_INET6: 4231 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4232 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4233 break; 4234 #endif 4235 default: 4236 break; 4237 } 4238 } else { 4239 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4240 } 4241 #endif /* SCTP_DEBUG */ 4242 switch (firstaddr->sa_family) { 4243 #ifdef INET 4244 case AF_INET: 4245 { 4246 struct sockaddr_in *sin; 4247 4248 sin = (struct sockaddr_in *)firstaddr; 4249 if ((ntohs(sin->sin_port) == 0) || 4250 (sin->sin_addr.s_addr == INADDR_ANY) || 4251 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4252 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4253 /* Invalid address */ 4254 SCTP_INP_RUNLOCK(inp); 4255 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4256 *error = EINVAL; 4257 return (NULL); 4258 } 4259 rport = sin->sin_port; 4260 break; 4261 } 4262 #endif 4263 #ifdef INET6 4264 case AF_INET6: 4265 { 4266 struct sockaddr_in6 *sin6; 4267 4268 sin6 = (struct sockaddr_in6 *)firstaddr; 4269 if ((ntohs(sin6->sin6_port) == 0) || 4270 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4271 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4272 /* Invalid address */ 4273 SCTP_INP_RUNLOCK(inp); 4274 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4275 *error = EINVAL; 4276 return (NULL); 4277 } 4278 rport = sin6->sin6_port; 4279 break; 4280 } 4281 #endif 4282 default: 4283 /* not supported family type */ 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 SCTP_INP_RUNLOCK(inp); 4290 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4291 /* 4292 * If you have not performed a bind, then we need to do the 4293 * ephemeral bind for you. 4294 */ 4295 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4296 (struct sockaddr *)NULL, 4297 (struct sctp_ifa *)NULL, 4298 p 4299 ))) { 4300 /* bind error, probably perm */ 4301 *error = err; 4302 return (NULL); 4303 } 4304 } 4305 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4306 if (stcb == NULL) { 4307 /* out of memory? */ 4308 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4309 *error = ENOMEM; 4310 return (NULL); 4311 } 4312 SCTP_INCR_ASOC_COUNT(); 4313 4314 bzero(stcb, sizeof(*stcb)); 4315 asoc = &stcb->asoc; 4316 4317 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4318 SCTP_TCB_LOCK_INIT(stcb); 4319 SCTP_TCB_SEND_LOCK_INIT(stcb); 4320 stcb->rport = rport; 4321 /* setup back pointer's */ 4322 stcb->sctp_ep = inp; 4323 stcb->sctp_socket = inp->sctp_socket; 4324 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4325 /* failed */ 4326 SCTP_TCB_LOCK_DESTROY(stcb); 4327 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4328 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4329 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4330 SCTP_DECR_ASOC_COUNT(); 4331 *error = err; 4332 return (NULL); 4333 } 4334 /* and the port */ 4335 SCTP_INP_INFO_WLOCK(); 4336 SCTP_INP_WLOCK(inp); 4337 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4338 /* inpcb freed while alloc going on */ 4339 SCTP_TCB_LOCK_DESTROY(stcb); 4340 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4341 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4342 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4343 SCTP_INP_WUNLOCK(inp); 4344 SCTP_INP_INFO_WUNLOCK(); 4345 SCTP_DECR_ASOC_COUNT(); 4346 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4347 *error = EINVAL; 4348 return (NULL); 4349 } 4350 SCTP_TCB_LOCK(stcb); 4351 4352 /* now that my_vtag is set, add it to the hash */ 4353 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4354 /* put it in the bucket in the vtag hash of assoc's for the system */ 4355 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4356 SCTP_INP_INFO_WUNLOCK(); 4357 4358 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4359 /* failure.. memory error? */ 4360 if (asoc->strmout) { 4361 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4362 asoc->strmout = NULL; 4363 } 4364 if (asoc->mapping_array) { 4365 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4366 asoc->mapping_array = NULL; 4367 } 4368 if (asoc->nr_mapping_array) { 4369 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4370 asoc->nr_mapping_array = NULL; 4371 } 4372 SCTP_DECR_ASOC_COUNT(); 4373 SCTP_TCB_UNLOCK(stcb); 4374 SCTP_TCB_LOCK_DESTROY(stcb); 4375 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4376 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4377 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4378 SCTP_INP_WUNLOCK(inp); 4379 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4380 *error = ENOBUFS; 4381 return (NULL); 4382 } 4383 /* Init all the timers */ 4384 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4385 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4386 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4387 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4388 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4389 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4390 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4391 4392 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4393 /* now file the port under the hash as well */ 4394 if (inp->sctp_tcbhash != NULL) { 4395 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4396 inp->sctp_hashmark)]; 4397 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4398 } 4399 SCTP_INP_WUNLOCK(inp); 4400 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4401 return (stcb); 4402 } 4403 4404 4405 void 4406 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4407 { 4408 struct sctp_association *asoc; 4409 4410 asoc = &stcb->asoc; 4411 asoc->numnets--; 4412 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4413 if (net == asoc->primary_destination) { 4414 /* Reset primary */ 4415 struct sctp_nets *lnet; 4416 4417 lnet = TAILQ_FIRST(&asoc->nets); 4418 /* 4419 * Mobility adaptation Ideally, if deleted destination is 4420 * the primary, it becomes a fast retransmission trigger by 4421 * the subsequent SET PRIMARY. (by micchie) 4422 */ 4423 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4424 SCTP_MOBILITY_BASE) || 4425 sctp_is_mobility_feature_on(stcb->sctp_ep, 4426 SCTP_MOBILITY_FASTHANDOFF)) { 4427 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4428 if (asoc->deleted_primary != NULL) { 4429 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4430 goto out; 4431 } 4432 asoc->deleted_primary = net; 4433 atomic_add_int(&net->ref_count, 1); 4434 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4435 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4436 sctp_mobility_feature_on(stcb->sctp_ep, 4437 SCTP_MOBILITY_PRIM_DELETED); 4438 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4439 stcb->sctp_ep, stcb, NULL); 4440 } 4441 out: 4442 /* Try to find a confirmed primary */ 4443 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4444 } 4445 if (net == asoc->last_data_chunk_from) { 4446 /* Reset primary */ 4447 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4448 } 4449 if (net == asoc->last_control_chunk_from) { 4450 /* Clear net */ 4451 asoc->last_control_chunk_from = NULL; 4452 } 4453 if (net == stcb->asoc.alternate) { 4454 sctp_free_remote_addr(stcb->asoc.alternate); 4455 stcb->asoc.alternate = NULL; 4456 } 4457 sctp_free_remote_addr(net); 4458 } 4459 4460 /* 4461 * remove a remote endpoint address from an association, it will fail if the 4462 * address does not exist. 4463 */ 4464 int 4465 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4466 { 4467 /* 4468 * Here we need to remove a remote address. This is quite simple, we 4469 * first find it in the list of address for the association 4470 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4471 * on that item. Note we do not allow it to be removed if there are 4472 * no other addresses. 4473 */ 4474 struct sctp_association *asoc; 4475 struct sctp_nets *net, *nnet; 4476 4477 asoc = &stcb->asoc; 4478 4479 /* locate the address */ 4480 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4481 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4482 continue; 4483 } 4484 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4485 remaddr)) { 4486 /* we found the guy */ 4487 if (asoc->numnets < 2) { 4488 /* Must have at LEAST two remote addresses */ 4489 return (-1); 4490 } else { 4491 sctp_remove_net(stcb, net); 4492 return (0); 4493 } 4494 } 4495 } 4496 /* not found. */ 4497 return (-2); 4498 } 4499 4500 void 4501 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4502 { 4503 struct sctpvtaghead *chain; 4504 struct sctp_tagblock *twait_block; 4505 int found = 0; 4506 int i; 4507 4508 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4509 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4510 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4511 if ((twait_block->vtag_block[i].v_tag == tag) && 4512 (twait_block->vtag_block[i].lport == lport) && 4513 (twait_block->vtag_block[i].rport == rport)) { 4514 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4515 twait_block->vtag_block[i].v_tag = 0; 4516 twait_block->vtag_block[i].lport = 0; 4517 twait_block->vtag_block[i].rport = 0; 4518 found = 1; 4519 break; 4520 } 4521 } 4522 if (found) 4523 break; 4524 } 4525 } 4526 4527 int 4528 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4529 { 4530 struct sctpvtaghead *chain; 4531 struct sctp_tagblock *twait_block; 4532 int found = 0; 4533 int i; 4534 4535 SCTP_INP_INFO_WLOCK(); 4536 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4537 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4538 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4539 if ((twait_block->vtag_block[i].v_tag == tag) && 4540 (twait_block->vtag_block[i].lport == lport) && 4541 (twait_block->vtag_block[i].rport == rport)) { 4542 found = 1; 4543 break; 4544 } 4545 } 4546 if (found) 4547 break; 4548 } 4549 SCTP_INP_INFO_WUNLOCK(); 4550 return (found); 4551 } 4552 4553 4554 void 4555 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4556 { 4557 struct sctpvtaghead *chain; 4558 struct sctp_tagblock *twait_block; 4559 struct timeval now; 4560 int set, i; 4561 4562 if (time == 0) { 4563 /* Its disabled */ 4564 return; 4565 } 4566 (void)SCTP_GETTIME_TIMEVAL(&now); 4567 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4568 set = 0; 4569 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4570 /* Block(s) present, lets find space, and expire on the fly */ 4571 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4572 if ((twait_block->vtag_block[i].v_tag == 0) && 4573 !set) { 4574 twait_block->vtag_block[i].tv_sec_at_expire = 4575 now.tv_sec + time; 4576 twait_block->vtag_block[i].v_tag = tag; 4577 twait_block->vtag_block[i].lport = lport; 4578 twait_block->vtag_block[i].rport = rport; 4579 set = 1; 4580 } else if ((twait_block->vtag_block[i].v_tag) && 4581 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4582 /* Audit expires this guy */ 4583 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4584 twait_block->vtag_block[i].v_tag = 0; 4585 twait_block->vtag_block[i].lport = 0; 4586 twait_block->vtag_block[i].rport = 0; 4587 if (set == 0) { 4588 /* Reuse it for my new tag */ 4589 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4590 twait_block->vtag_block[i].v_tag = tag; 4591 twait_block->vtag_block[i].lport = lport; 4592 twait_block->vtag_block[i].rport = rport; 4593 set = 1; 4594 } 4595 } 4596 } 4597 if (set) { 4598 /* 4599 * We only do up to the block where we can place our 4600 * tag for audits 4601 */ 4602 break; 4603 } 4604 } 4605 /* Need to add a new block to chain */ 4606 if (!set) { 4607 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4608 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4609 if (twait_block == NULL) { 4610 #ifdef INVARIANTS 4611 panic("Can not alloc tagblock"); 4612 #endif 4613 return; 4614 } 4615 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4616 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4617 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4618 twait_block->vtag_block[0].v_tag = tag; 4619 twait_block->vtag_block[0].lport = lport; 4620 twait_block->vtag_block[0].rport = rport; 4621 } 4622 } 4623 4624 void 4625 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4626 { 4627 struct sctp_tmit_chunk *chk, *nchk; 4628 struct sctp_queued_to_read *ctl, *nctl; 4629 4630 TAILQ_FOREACH_SAFE(ctl, rh, next_instrm, nctl) { 4631 TAILQ_REMOVE(rh, ctl, next_instrm); 4632 ctl->on_strm_q = 0; 4633 if (ctl->on_read_q == 0) { 4634 sctp_free_remote_addr(ctl->whoFrom); 4635 if (ctl->data) { 4636 sctp_m_freem(ctl->data); 4637 ctl->data = NULL; 4638 } 4639 } 4640 /* Reassembly free? */ 4641 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 4642 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 4643 if (chk->data) { 4644 sctp_m_freem(chk->data); 4645 chk->data = NULL; 4646 } 4647 if (chk->holds_key_ref) 4648 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4649 sctp_free_remote_addr(chk->whoTo); 4650 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4651 SCTP_DECR_CHK_COUNT(); 4652 /* sa_ignore FREED_MEMORY */ 4653 } 4654 /* 4655 * We don't free the address here since all the net's were 4656 * freed above. 4657 */ 4658 if (ctl->on_read_q == 0) { 4659 sctp_free_a_readq(stcb, ctl); 4660 } 4661 } 4662 } 4663 4664 4665 /*- 4666 * Free the association after un-hashing the remote port. This 4667 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4668 * expect that the input to this function IS a locked TCB. 4669 * It will return 0, if it did NOT destroy the association (instead 4670 * it unlocks it. It will return NON-zero if it either destroyed the 4671 * association OR the association is already destroyed. 4672 */ 4673 int 4674 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4675 { 4676 int i; 4677 struct sctp_association *asoc; 4678 struct sctp_nets *net, *nnet; 4679 struct sctp_laddr *laddr, *naddr; 4680 struct sctp_tmit_chunk *chk, *nchk; 4681 struct sctp_asconf_addr *aparam, *naparam; 4682 struct sctp_asconf_ack *aack, *naack; 4683 struct sctp_stream_reset_list *strrst, *nstrrst; 4684 struct sctp_queued_to_read *sq, *nsq; 4685 struct sctp_stream_queue_pending *sp, *nsp; 4686 sctp_sharedkey_t *shared_key, *nshared_key; 4687 struct socket *so; 4688 4689 /* first, lets purge the entry from the hash table. */ 4690 4691 #ifdef SCTP_LOG_CLOSING 4692 sctp_log_closing(inp, stcb, 6); 4693 #endif 4694 if (stcb->asoc.state == 0) { 4695 #ifdef SCTP_LOG_CLOSING 4696 sctp_log_closing(inp, NULL, 7); 4697 #endif 4698 /* there is no asoc, really TSNH :-0 */ 4699 return (1); 4700 } 4701 if (stcb->asoc.alternate) { 4702 sctp_free_remote_addr(stcb->asoc.alternate); 4703 stcb->asoc.alternate = NULL; 4704 } 4705 /* TEMP CODE */ 4706 if (stcb->freed_from_where == 0) { 4707 /* Only record the first place free happened from */ 4708 stcb->freed_from_where = from_location; 4709 } 4710 /* TEMP CODE */ 4711 4712 asoc = &stcb->asoc; 4713 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4714 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4715 /* nothing around */ 4716 so = NULL; 4717 else 4718 so = inp->sctp_socket; 4719 4720 /* 4721 * We used timer based freeing if a reader or writer is in the way. 4722 * So we first check if we are actually being called from a timer, 4723 * if so we abort early if a reader or writer is still in the way. 4724 */ 4725 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4726 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4727 /* 4728 * is it the timer driving us? if so are the reader/writers 4729 * gone? 4730 */ 4731 if (stcb->asoc.refcnt) { 4732 /* nope, reader or writer in the way */ 4733 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4734 /* no asoc destroyed */ 4735 SCTP_TCB_UNLOCK(stcb); 4736 #ifdef SCTP_LOG_CLOSING 4737 sctp_log_closing(inp, stcb, 8); 4738 #endif 4739 return (0); 4740 } 4741 } 4742 /* now clean up any other timers */ 4743 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4744 asoc->dack_timer.self = NULL; 4745 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4746 /*- 4747 * For stream reset we don't blast this unless 4748 * it is a str-reset timer, it might be the 4749 * free-asoc timer which we DON'T want to 4750 * disturb. 4751 */ 4752 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4753 asoc->strreset_timer.self = NULL; 4754 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4755 asoc->asconf_timer.self = NULL; 4756 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4757 asoc->autoclose_timer.self = NULL; 4758 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4759 asoc->shut_guard_timer.self = NULL; 4760 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4761 asoc->delayed_event_timer.self = NULL; 4762 /* Mobility adaptation */ 4763 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4764 asoc->delete_prim_timer.self = NULL; 4765 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4766 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4767 net->rxt_timer.self = NULL; 4768 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4769 net->pmtu_timer.self = NULL; 4770 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4771 net->hb_timer.self = NULL; 4772 } 4773 /* Now the read queue needs to be cleaned up (only once) */ 4774 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4775 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4776 SCTP_INP_READ_LOCK(inp); 4777 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4778 if (sq->stcb == stcb) { 4779 sq->do_not_ref_stcb = 1; 4780 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4781 /* 4782 * If there is no end, there never will be 4783 * now. 4784 */ 4785 if (sq->end_added == 0) { 4786 /* Held for PD-API clear that. */ 4787 sq->pdapi_aborted = 1; 4788 sq->held_length = 0; 4789 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4790 /* 4791 * Need to add a PD-API 4792 * aborted indication. 4793 * Setting the control_pdapi 4794 * assures that it will be 4795 * added right after this 4796 * msg. 4797 */ 4798 uint32_t strseq; 4799 4800 stcb->asoc.control_pdapi = sq; 4801 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4802 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4803 stcb, 4804 SCTP_PARTIAL_DELIVERY_ABORTED, 4805 (void *)&strseq, 4806 SCTP_SO_LOCKED); 4807 stcb->asoc.control_pdapi = NULL; 4808 } 4809 } 4810 /* Add an end to wake them */ 4811 sq->end_added = 1; 4812 } 4813 } 4814 SCTP_INP_READ_UNLOCK(inp); 4815 if (stcb->block_entry) { 4816 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4817 stcb->block_entry->error = ECONNRESET; 4818 stcb->block_entry = NULL; 4819 } 4820 } 4821 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4822 /* 4823 * Someone holds a reference OR the socket is unaccepted 4824 * yet. 4825 */ 4826 if ((stcb->asoc.refcnt) || 4827 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4828 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4829 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4830 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4831 } 4832 SCTP_TCB_UNLOCK(stcb); 4833 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4834 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4835 /* nothing around */ 4836 so = NULL; 4837 if (so) { 4838 /* Wake any reader/writers */ 4839 sctp_sorwakeup(inp, so); 4840 sctp_sowwakeup(inp, so); 4841 } 4842 #ifdef SCTP_LOG_CLOSING 4843 sctp_log_closing(inp, stcb, 9); 4844 #endif 4845 /* no asoc destroyed */ 4846 return (0); 4847 } 4848 #ifdef SCTP_LOG_CLOSING 4849 sctp_log_closing(inp, stcb, 10); 4850 #endif 4851 /* 4852 * When I reach here, no others want to kill the assoc yet.. and I 4853 * own the lock. Now its possible an abort comes in when I do the 4854 * lock exchange below to grab all the locks to do the final take 4855 * out. to prevent this we increment the count, which will start a 4856 * timer and blow out above thus assuring us that we hold exclusive 4857 * killing of the asoc. Note that after getting back the TCB lock we 4858 * will go ahead and increment the counter back up and stop any 4859 * timer a passing stranger may have started :-S 4860 */ 4861 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4862 atomic_add_int(&stcb->asoc.refcnt, 1); 4863 4864 SCTP_TCB_UNLOCK(stcb); 4865 SCTP_INP_INFO_WLOCK(); 4866 SCTP_INP_WLOCK(inp); 4867 SCTP_TCB_LOCK(stcb); 4868 } 4869 /* Double check the GONE flag */ 4870 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4871 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4872 /* nothing around */ 4873 so = NULL; 4874 4875 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4876 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4877 /* 4878 * For TCP type we need special handling when we are 4879 * connected. We also include the peel'ed off ones to. 4880 */ 4881 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4882 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4883 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4884 if (so) { 4885 SOCK_LOCK(so); 4886 if (so->so_rcv.sb_cc == 0) { 4887 so->so_state &= ~(SS_ISCONNECTING | 4888 SS_ISDISCONNECTING | 4889 SS_ISCONFIRMING | 4890 SS_ISCONNECTED); 4891 } 4892 socantrcvmore_locked(so); 4893 socantsendmore(so); 4894 sctp_sowwakeup(inp, so); 4895 sctp_sorwakeup(inp, so); 4896 SCTP_SOWAKEUP(so); 4897 } 4898 } 4899 } 4900 /* 4901 * Make it invalid too, that way if its about to run it will abort 4902 * and return. 4903 */ 4904 /* re-increment the lock */ 4905 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4906 atomic_add_int(&stcb->asoc.refcnt, -1); 4907 } 4908 if (stcb->asoc.refcnt) { 4909 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4910 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4911 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4912 SCTP_INP_INFO_WUNLOCK(); 4913 SCTP_INP_WUNLOCK(inp); 4914 } 4915 SCTP_TCB_UNLOCK(stcb); 4916 return (0); 4917 } 4918 asoc->state = 0; 4919 if (inp->sctp_tcbhash) { 4920 LIST_REMOVE(stcb, sctp_tcbhash); 4921 } 4922 if (stcb->asoc.in_asocid_hash) { 4923 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4924 } 4925 /* Now lets remove it from the list of ALL associations in the EP */ 4926 LIST_REMOVE(stcb, sctp_tcblist); 4927 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4928 SCTP_INP_INCR_REF(inp); 4929 SCTP_INP_WUNLOCK(inp); 4930 } 4931 /* pull from vtag hash */ 4932 LIST_REMOVE(stcb, sctp_asocs); 4933 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4934 inp->sctp_lport, stcb->rport); 4935 4936 /* 4937 * Now restop the timers to be sure this is paranoia at is finest! 4938 */ 4939 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4940 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4941 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4942 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4943 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4944 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4945 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4946 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4947 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4948 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4949 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4950 } 4951 4952 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4953 /* 4954 * The chunk lists and such SHOULD be empty but we check them just 4955 * in case. 4956 */ 4957 /* anything on the wheel needs to be removed */ 4958 for (i = 0; i < asoc->streamoutcnt; i++) { 4959 struct sctp_stream_out *outs; 4960 4961 outs = &asoc->strmout[i]; 4962 /* now clean up any chunks here */ 4963 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4964 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4965 TAILQ_REMOVE(&outs->outqueue, sp, next); 4966 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0); 4967 sctp_free_spbufspace(stcb, asoc, sp); 4968 if (sp->data) { 4969 if (so) { 4970 /* Still an open socket - report */ 4971 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4972 0, (void *)sp, SCTP_SO_LOCKED); 4973 } 4974 if (sp->data) { 4975 sctp_m_freem(sp->data); 4976 sp->data = NULL; 4977 sp->tail_mbuf = NULL; 4978 sp->length = 0; 4979 } 4980 } 4981 if (sp->net) { 4982 sctp_free_remote_addr(sp->net); 4983 sp->net = NULL; 4984 } 4985 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4986 } 4987 } 4988 /* sa_ignore FREED_MEMORY */ 4989 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4990 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4991 SCTP_FREE(strrst, SCTP_M_STRESET); 4992 } 4993 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4994 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4995 if (sq->data) { 4996 sctp_m_freem(sq->data); 4997 sq->data = NULL; 4998 } 4999 sctp_free_remote_addr(sq->whoFrom); 5000 sq->whoFrom = NULL; 5001 sq->stcb = NULL; 5002 /* Free the ctl entry */ 5003 sctp_free_a_readq(stcb, sq); 5004 /* sa_ignore FREED_MEMORY */ 5005 } 5006 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5007 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5008 if (chk->data) { 5009 sctp_m_freem(chk->data); 5010 chk->data = NULL; 5011 } 5012 if (chk->holds_key_ref) 5013 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5014 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5015 SCTP_DECR_CHK_COUNT(); 5016 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5017 asoc->free_chunk_cnt--; 5018 /* sa_ignore FREED_MEMORY */ 5019 } 5020 /* pending send queue SHOULD be empty */ 5021 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5022 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5023 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5024 #ifdef INVARIANTS 5025 } else { 5026 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5027 #endif 5028 } 5029 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5030 if (chk->data) { 5031 if (so) { 5032 /* Still a socket? */ 5033 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5034 0, chk, SCTP_SO_LOCKED); 5035 } 5036 if (chk->data) { 5037 sctp_m_freem(chk->data); 5038 chk->data = NULL; 5039 } 5040 } 5041 if (chk->holds_key_ref) 5042 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5043 if (chk->whoTo) { 5044 sctp_free_remote_addr(chk->whoTo); 5045 chk->whoTo = NULL; 5046 } 5047 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5048 SCTP_DECR_CHK_COUNT(); 5049 /* sa_ignore FREED_MEMORY */ 5050 } 5051 /* sent queue SHOULD be empty */ 5052 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5053 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5054 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5055 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5056 #ifdef INVARIANTS 5057 } else { 5058 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5059 #endif 5060 } 5061 } 5062 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5063 if (chk->data) { 5064 if (so) { 5065 /* Still a socket? */ 5066 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5067 0, chk, SCTP_SO_LOCKED); 5068 } 5069 if (chk->data) { 5070 sctp_m_freem(chk->data); 5071 chk->data = NULL; 5072 } 5073 } 5074 if (chk->holds_key_ref) 5075 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5076 sctp_free_remote_addr(chk->whoTo); 5077 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5078 SCTP_DECR_CHK_COUNT(); 5079 /* sa_ignore FREED_MEMORY */ 5080 } 5081 #ifdef INVARIANTS 5082 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5083 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5084 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5085 } 5086 } 5087 #endif 5088 /* control queue MAY not be empty */ 5089 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5090 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5091 if (chk->data) { 5092 sctp_m_freem(chk->data); 5093 chk->data = NULL; 5094 } 5095 if (chk->holds_key_ref) 5096 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5097 sctp_free_remote_addr(chk->whoTo); 5098 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5099 SCTP_DECR_CHK_COUNT(); 5100 /* sa_ignore FREED_MEMORY */ 5101 } 5102 /* ASCONF queue MAY not be empty */ 5103 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5104 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5105 if (chk->data) { 5106 sctp_m_freem(chk->data); 5107 chk->data = NULL; 5108 } 5109 if (chk->holds_key_ref) 5110 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5111 sctp_free_remote_addr(chk->whoTo); 5112 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5113 SCTP_DECR_CHK_COUNT(); 5114 /* sa_ignore FREED_MEMORY */ 5115 } 5116 if (asoc->mapping_array) { 5117 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5118 asoc->mapping_array = NULL; 5119 } 5120 if (asoc->nr_mapping_array) { 5121 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5122 asoc->nr_mapping_array = NULL; 5123 } 5124 /* the stream outs */ 5125 if (asoc->strmout) { 5126 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5127 asoc->strmout = NULL; 5128 } 5129 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5130 if (asoc->strmin) { 5131 for (i = 0; i < asoc->streamincnt; i++) { 5132 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5133 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5134 } 5135 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5136 asoc->strmin = NULL; 5137 } 5138 asoc->streamincnt = 0; 5139 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5140 #ifdef INVARIANTS 5141 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5142 panic("no net's left alloc'ed, or list points to itself"); 5143 } 5144 #endif 5145 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5146 sctp_free_remote_addr(net); 5147 } 5148 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5149 /* sa_ignore FREED_MEMORY */ 5150 sctp_remove_laddr(laddr); 5151 } 5152 5153 /* pending asconf (address) parameters */ 5154 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5155 /* sa_ignore FREED_MEMORY */ 5156 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5157 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5158 } 5159 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5160 /* sa_ignore FREED_MEMORY */ 5161 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5162 if (aack->data != NULL) { 5163 sctp_m_freem(aack->data); 5164 } 5165 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5166 } 5167 /* clean up auth stuff */ 5168 if (asoc->local_hmacs) 5169 sctp_free_hmaclist(asoc->local_hmacs); 5170 if (asoc->peer_hmacs) 5171 sctp_free_hmaclist(asoc->peer_hmacs); 5172 5173 if (asoc->local_auth_chunks) 5174 sctp_free_chunklist(asoc->local_auth_chunks); 5175 if (asoc->peer_auth_chunks) 5176 sctp_free_chunklist(asoc->peer_auth_chunks); 5177 5178 sctp_free_authinfo(&asoc->authinfo); 5179 5180 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5181 LIST_REMOVE(shared_key, next); 5182 sctp_free_sharedkey(shared_key); 5183 /* sa_ignore FREED_MEMORY */ 5184 } 5185 5186 /* Insert new items here :> */ 5187 5188 /* Get rid of LOCK */ 5189 SCTP_TCB_UNLOCK(stcb); 5190 SCTP_TCB_LOCK_DESTROY(stcb); 5191 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5192 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5193 SCTP_INP_INFO_WUNLOCK(); 5194 SCTP_INP_RLOCK(inp); 5195 } 5196 #ifdef SCTP_TRACK_FREED_ASOCS 5197 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5198 /* now clean up the tasoc itself */ 5199 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5200 SCTP_DECR_ASOC_COUNT(); 5201 } else { 5202 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5203 } 5204 #else 5205 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5206 SCTP_DECR_ASOC_COUNT(); 5207 #endif 5208 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5209 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5210 /* 5211 * If its NOT the inp_free calling us AND sctp_close 5212 * as been called, we call back... 5213 */ 5214 SCTP_INP_RUNLOCK(inp); 5215 /* 5216 * This will start the kill timer (if we are the 5217 * last one) since we hold an increment yet. But 5218 * this is the only safe way to do this since 5219 * otherwise if the socket closes at the same time 5220 * we are here we might collide in the cleanup. 5221 */ 5222 sctp_inpcb_free(inp, 5223 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5224 SCTP_CALLED_DIRECTLY_NOCMPSET); 5225 SCTP_INP_DECR_REF(inp); 5226 goto out_of; 5227 } else { 5228 /* The socket is still open. */ 5229 SCTP_INP_DECR_REF(inp); 5230 } 5231 } 5232 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5233 SCTP_INP_RUNLOCK(inp); 5234 } 5235 out_of: 5236 /* destroyed the asoc */ 5237 #ifdef SCTP_LOG_CLOSING 5238 sctp_log_closing(inp, NULL, 11); 5239 #endif 5240 return (1); 5241 } 5242 5243 5244 5245 /* 5246 * determine if a destination is "reachable" based upon the addresses bound 5247 * to the current endpoint (e.g. only v4 or v6 currently bound) 5248 */ 5249 /* 5250 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5251 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5252 * types bound as its endpoint 5253 */ 5254 int 5255 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5256 { 5257 struct sctp_inpcb *inp; 5258 int answer; 5259 5260 /* 5261 * No locks here, the TCB, in all cases is already locked and an 5262 * assoc is up. There is either a INP lock by the caller applied (in 5263 * asconf case when deleting an address) or NOT in the HB case, 5264 * however if HB then the INP increment is up and the INP will not 5265 * be removed (on top of the fact that we have a TCB lock). So we 5266 * only want to read the sctp_flags, which is either bound-all or 5267 * not.. no protection needed since once an assoc is up you can't be 5268 * changing your binding. 5269 */ 5270 inp = stcb->sctp_ep; 5271 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5272 /* if bound all, destination is not restricted */ 5273 /* 5274 * RRS: Question during lock work: Is this correct? If you 5275 * are bound-all you still might need to obey the V4--V6 5276 * flags??? IMO this bound-all stuff needs to be removed! 5277 */ 5278 return (1); 5279 } 5280 /* NOTE: all "scope" checks are done when local addresses are added */ 5281 switch (destaddr->sa_family) { 5282 #ifdef INET6 5283 case AF_INET6: 5284 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5285 break; 5286 #endif 5287 #ifdef INET 5288 case AF_INET: 5289 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5290 break; 5291 #endif 5292 default: 5293 /* invalid family, so it's unreachable */ 5294 answer = 0; 5295 break; 5296 } 5297 return (answer); 5298 } 5299 5300 /* 5301 * update the inp_vflags on an endpoint 5302 */ 5303 static void 5304 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5305 { 5306 struct sctp_laddr *laddr; 5307 5308 /* first clear the flag */ 5309 inp->ip_inp.inp.inp_vflag = 0; 5310 /* set the flag based on addresses on the ep list */ 5311 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5312 if (laddr->ifa == NULL) { 5313 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5314 __func__); 5315 continue; 5316 } 5317 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5318 continue; 5319 } 5320 switch (laddr->ifa->address.sa.sa_family) { 5321 #ifdef INET6 5322 case AF_INET6: 5323 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5324 break; 5325 #endif 5326 #ifdef INET 5327 case AF_INET: 5328 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5329 break; 5330 #endif 5331 default: 5332 break; 5333 } 5334 } 5335 } 5336 5337 /* 5338 * Add the address to the endpoint local address list There is nothing to be 5339 * done if we are bound to all addresses 5340 */ 5341 void 5342 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5343 { 5344 struct sctp_laddr *laddr; 5345 struct sctp_tcb *stcb; 5346 int fnd, error = 0; 5347 5348 fnd = 0; 5349 5350 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5351 /* You are already bound to all. You have it already */ 5352 return; 5353 } 5354 #ifdef INET6 5355 if (ifa->address.sa.sa_family == AF_INET6) { 5356 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5357 /* Can't bind a non-useable addr. */ 5358 return; 5359 } 5360 } 5361 #endif 5362 /* first, is it already present? */ 5363 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5364 if (laddr->ifa == ifa) { 5365 fnd = 1; 5366 break; 5367 } 5368 } 5369 5370 if (fnd == 0) { 5371 /* Not in the ep list */ 5372 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5373 if (error != 0) 5374 return; 5375 inp->laddr_count++; 5376 /* update inp_vflag flags */ 5377 switch (ifa->address.sa.sa_family) { 5378 #ifdef INET6 5379 case AF_INET6: 5380 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5381 break; 5382 #endif 5383 #ifdef INET 5384 case AF_INET: 5385 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5386 break; 5387 #endif 5388 default: 5389 break; 5390 } 5391 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5392 sctp_add_local_addr_restricted(stcb, ifa); 5393 } 5394 } 5395 return; 5396 } 5397 5398 5399 /* 5400 * select a new (hopefully reachable) destination net (should only be used 5401 * when we deleted an ep addr that is the only usable source address to reach 5402 * the destination net) 5403 */ 5404 static void 5405 sctp_select_primary_destination(struct sctp_tcb *stcb) 5406 { 5407 struct sctp_nets *net; 5408 5409 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5410 /* for now, we'll just pick the first reachable one we find */ 5411 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5412 continue; 5413 if (sctp_destination_is_reachable(stcb, 5414 (struct sockaddr *)&net->ro._l_addr)) { 5415 /* found a reachable destination */ 5416 stcb->asoc.primary_destination = net; 5417 } 5418 } 5419 /* I can't there from here! ...we're gonna die shortly... */ 5420 } 5421 5422 5423 /* 5424 * Delete the address from the endpoint local address list. There is nothing 5425 * to be done if we are bound to all addresses 5426 */ 5427 void 5428 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5429 { 5430 struct sctp_laddr *laddr; 5431 int fnd; 5432 5433 fnd = 0; 5434 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5435 /* You are already bound to all. You have it already */ 5436 return; 5437 } 5438 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5439 if (laddr->ifa == ifa) { 5440 fnd = 1; 5441 break; 5442 } 5443 } 5444 if (fnd && (inp->laddr_count < 2)) { 5445 /* can't delete unless there are at LEAST 2 addresses */ 5446 return; 5447 } 5448 if (fnd) { 5449 /* 5450 * clean up any use of this address go through our 5451 * associations and clear any last_used_address that match 5452 * this one for each assoc, see if a new primary_destination 5453 * is needed 5454 */ 5455 struct sctp_tcb *stcb; 5456 5457 /* clean up "next_addr_touse" */ 5458 if (inp->next_addr_touse == laddr) 5459 /* delete this address */ 5460 inp->next_addr_touse = NULL; 5461 5462 /* clean up "last_used_address" */ 5463 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5464 struct sctp_nets *net; 5465 5466 SCTP_TCB_LOCK(stcb); 5467 if (stcb->asoc.last_used_address == laddr) 5468 /* delete this address */ 5469 stcb->asoc.last_used_address = NULL; 5470 /* 5471 * Now spin through all the nets and purge any ref 5472 * to laddr 5473 */ 5474 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5475 if (net->ro._s_addr == laddr->ifa) { 5476 /* Yep, purge src address selected */ 5477 sctp_rtentry_t *rt; 5478 5479 /* delete this address if cached */ 5480 rt = net->ro.ro_rt; 5481 if (rt != NULL) { 5482 RTFREE(rt); 5483 net->ro.ro_rt = NULL; 5484 } 5485 sctp_free_ifa(net->ro._s_addr); 5486 net->ro._s_addr = NULL; 5487 net->src_addr_selected = 0; 5488 } 5489 } 5490 SCTP_TCB_UNLOCK(stcb); 5491 } /* for each tcb */ 5492 /* remove it from the ep list */ 5493 sctp_remove_laddr(laddr); 5494 inp->laddr_count--; 5495 /* update inp_vflag flags */ 5496 sctp_update_ep_vflag(inp); 5497 } 5498 return; 5499 } 5500 5501 /* 5502 * Add the address to the TCB local address restricted list. 5503 * This is a "pending" address list (eg. addresses waiting for an 5504 * ASCONF-ACK response) and cannot be used as a valid source address. 5505 */ 5506 void 5507 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5508 { 5509 struct sctp_laddr *laddr; 5510 struct sctpladdr *list; 5511 5512 /* 5513 * Assumes TCB is locked.. and possibly the INP. May need to 5514 * confirm/fix that if we need it and is not the case. 5515 */ 5516 list = &stcb->asoc.sctp_restricted_addrs; 5517 5518 #ifdef INET6 5519 if (ifa->address.sa.sa_family == AF_INET6) { 5520 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5521 /* Can't bind a non-existent addr. */ 5522 return; 5523 } 5524 } 5525 #endif 5526 /* does the address already exist? */ 5527 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5528 if (laddr->ifa == ifa) { 5529 return; 5530 } 5531 } 5532 5533 /* add to the list */ 5534 (void)sctp_insert_laddr(list, ifa, 0); 5535 return; 5536 } 5537 5538 /* 5539 * Remove a local address from the TCB local address restricted list 5540 */ 5541 void 5542 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5543 { 5544 struct sctp_inpcb *inp; 5545 struct sctp_laddr *laddr; 5546 5547 /* 5548 * This is called by asconf work. It is assumed that a) The TCB is 5549 * locked and b) The INP is locked. This is true in as much as I can 5550 * trace through the entry asconf code where I did these locks. 5551 * Again, the ASCONF code is a bit different in that it does lock 5552 * the INP during its work often times. This must be since we don't 5553 * want other proc's looking up things while what they are looking 5554 * up is changing :-D 5555 */ 5556 5557 inp = stcb->sctp_ep; 5558 /* if subset bound and don't allow ASCONF's, can't delete last */ 5559 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5560 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5561 if (stcb->sctp_ep->laddr_count < 2) { 5562 /* can't delete last address */ 5563 return; 5564 } 5565 } 5566 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5567 /* remove the address if it exists */ 5568 if (laddr->ifa == NULL) 5569 continue; 5570 if (laddr->ifa == ifa) { 5571 sctp_remove_laddr(laddr); 5572 return; 5573 } 5574 } 5575 5576 /* address not found! */ 5577 return; 5578 } 5579 5580 /* 5581 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5582 */ 5583 /* sysctl */ 5584 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5585 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5586 5587 5588 5589 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5590 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5591 int *sctp_cpuarry = NULL; 5592 void 5593 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5594 { 5595 /* Queue a packet to a processor for the specified core */ 5596 struct sctp_mcore_queue *qent; 5597 struct sctp_mcore_ctrl *wkq; 5598 int need_wake = 0; 5599 5600 if (sctp_mcore_workers == NULL) { 5601 /* Something went way bad during setup */ 5602 sctp_input_with_port(m, off, 0); 5603 return; 5604 } 5605 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5606 (sizeof(struct sctp_mcore_queue)), 5607 SCTP_M_MCORE); 5608 if (qent == NULL) { 5609 /* This is trouble */ 5610 sctp_input_with_port(m, off, 0); 5611 return; 5612 } 5613 qent->vn = curvnet; 5614 qent->m = m; 5615 qent->off = off; 5616 qent->v6 = 0; 5617 wkq = &sctp_mcore_workers[cpu_to_use]; 5618 SCTP_MCORE_QLOCK(wkq); 5619 5620 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5621 if (wkq->running == 0) { 5622 need_wake = 1; 5623 } 5624 SCTP_MCORE_QUNLOCK(wkq); 5625 if (need_wake) { 5626 wakeup(&wkq->running); 5627 } 5628 } 5629 5630 static void 5631 sctp_mcore_thread(void *arg) 5632 { 5633 5634 struct sctp_mcore_ctrl *wkq; 5635 struct sctp_mcore_queue *qent; 5636 5637 wkq = (struct sctp_mcore_ctrl *)arg; 5638 struct mbuf *m; 5639 int off, v6; 5640 5641 /* Wait for first tickle */ 5642 SCTP_MCORE_LOCK(wkq); 5643 wkq->running = 0; 5644 msleep(&wkq->running, 5645 &wkq->core_mtx, 5646 0, "wait for pkt", 0); 5647 SCTP_MCORE_UNLOCK(wkq); 5648 5649 /* Bind to our cpu */ 5650 thread_lock(curthread); 5651 sched_bind(curthread, wkq->cpuid); 5652 thread_unlock(curthread); 5653 5654 /* Now lets start working */ 5655 SCTP_MCORE_LOCK(wkq); 5656 /* Now grab lock and go */ 5657 for (;;) { 5658 SCTP_MCORE_QLOCK(wkq); 5659 skip_sleep: 5660 wkq->running = 1; 5661 qent = TAILQ_FIRST(&wkq->que); 5662 if (qent) { 5663 TAILQ_REMOVE(&wkq->que, qent, next); 5664 SCTP_MCORE_QUNLOCK(wkq); 5665 CURVNET_SET(qent->vn); 5666 m = qent->m; 5667 off = qent->off; 5668 v6 = qent->v6; 5669 SCTP_FREE(qent, SCTP_M_MCORE); 5670 if (v6 == 0) { 5671 sctp_input_with_port(m, off, 0); 5672 } else { 5673 SCTP_PRINTF("V6 not yet supported\n"); 5674 sctp_m_freem(m); 5675 } 5676 CURVNET_RESTORE(); 5677 SCTP_MCORE_QLOCK(wkq); 5678 } 5679 wkq->running = 0; 5680 if (!TAILQ_EMPTY(&wkq->que)) { 5681 goto skip_sleep; 5682 } 5683 SCTP_MCORE_QUNLOCK(wkq); 5684 msleep(&wkq->running, 5685 &wkq->core_mtx, 5686 0, "wait for pkt", 0); 5687 } 5688 } 5689 5690 static void 5691 sctp_startup_mcore_threads(void) 5692 { 5693 int i, cpu; 5694 5695 if (mp_ncpus == 1) 5696 return; 5697 5698 if (sctp_mcore_workers != NULL) { 5699 /* 5700 * Already been here in some previous vnet? 5701 */ 5702 return; 5703 } 5704 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5705 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5706 SCTP_M_MCORE); 5707 if (sctp_mcore_workers == NULL) { 5708 /* TSNH I hope */ 5709 return; 5710 } 5711 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5712 sizeof(struct sctp_mcore_ctrl))); 5713 /* Init the structures */ 5714 for (i = 0; i <= mp_maxid; i++) { 5715 TAILQ_INIT(&sctp_mcore_workers[i].que); 5716 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5717 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5718 sctp_mcore_workers[i].cpuid = i; 5719 } 5720 if (sctp_cpuarry == NULL) { 5721 SCTP_MALLOC(sctp_cpuarry, int *, 5722 (mp_ncpus * sizeof(int)), 5723 SCTP_M_MCORE); 5724 i = 0; 5725 CPU_FOREACH(cpu) { 5726 sctp_cpuarry[i] = cpu; 5727 i++; 5728 } 5729 } 5730 /* Now start them all */ 5731 CPU_FOREACH(cpu) { 5732 (void)kproc_create(sctp_mcore_thread, 5733 (void *)&sctp_mcore_workers[cpu], 5734 &sctp_mcore_workers[cpu].thread_proc, 5735 RFPROC, 5736 SCTP_KTHREAD_PAGES, 5737 SCTP_MCORE_NAME); 5738 5739 } 5740 } 5741 #endif 5742 5743 void 5744 sctp_pcb_init() 5745 { 5746 /* 5747 * SCTP initialization for the PCB structures should be called by 5748 * the sctp_init() function. 5749 */ 5750 int i; 5751 struct timeval tv; 5752 5753 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5754 /* error I was called twice */ 5755 return; 5756 } 5757 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5758 5759 #if defined(SCTP_LOCAL_TRACE_BUF) 5760 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5761 #endif 5762 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5763 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5764 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5765 SCTP_M_MCORE); 5766 #endif 5767 (void)SCTP_GETTIME_TIMEVAL(&tv); 5768 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5769 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5770 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5771 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5772 #else 5773 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5774 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5775 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5776 #endif 5777 /* init the empty list of (All) Endpoints */ 5778 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5779 5780 5781 /* init the hash table of endpoints */ 5782 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5783 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5784 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5785 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5786 &SCTP_BASE_INFO(hashasocmark)); 5787 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5788 &SCTP_BASE_INFO(hashmark)); 5789 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5790 &SCTP_BASE_INFO(hashtcpmark)); 5791 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5792 5793 5794 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5795 &SCTP_BASE_INFO(hashvrfmark)); 5796 5797 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5798 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5799 /* init the zones */ 5800 /* 5801 * FIX ME: Should check for NULL returns, but if it does fail we are 5802 * doomed to panic anyways... add later maybe. 5803 */ 5804 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5805 sizeof(struct sctp_inpcb), maxsockets); 5806 5807 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5808 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5809 5810 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5811 sizeof(struct sctp_laddr), 5812 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5813 5814 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5815 sizeof(struct sctp_nets), 5816 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5817 5818 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5819 sizeof(struct sctp_tmit_chunk), 5820 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5821 5822 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5823 sizeof(struct sctp_queued_to_read), 5824 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5825 5826 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5827 sizeof(struct sctp_stream_queue_pending), 5828 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5829 5830 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5831 sizeof(struct sctp_asconf), 5832 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5833 5834 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5835 sizeof(struct sctp_asconf_ack), 5836 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5837 5838 5839 /* Master Lock INIT for info structure */ 5840 SCTP_INP_INFO_LOCK_INIT(); 5841 SCTP_STATLOG_INIT_LOCK(); 5842 5843 SCTP_IPI_COUNT_INIT(); 5844 SCTP_IPI_ADDR_INIT(); 5845 #ifdef SCTP_PACKET_LOGGING 5846 SCTP_IP_PKTLOG_INIT(); 5847 #endif 5848 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5849 5850 SCTP_WQ_ADDR_INIT(); 5851 /* not sure if we need all the counts */ 5852 SCTP_BASE_INFO(ipi_count_ep) = 0; 5853 /* assoc/tcb zone info */ 5854 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5855 /* local addrlist zone info */ 5856 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5857 /* remote addrlist zone info */ 5858 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5859 /* chunk info */ 5860 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5861 5862 /* socket queue zone info */ 5863 SCTP_BASE_INFO(ipi_count_readq) = 0; 5864 5865 /* stream out queue cont */ 5866 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5867 5868 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5869 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5870 5871 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5872 5873 /* Init the TIMEWAIT list */ 5874 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5875 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5876 } 5877 sctp_startup_iterator(); 5878 5879 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5880 sctp_startup_mcore_threads(); 5881 #endif 5882 5883 /* 5884 * INIT the default VRF which for BSD is the only one, other O/S's 5885 * may have more. But initially they must start with one and then 5886 * add the VRF's as addresses are added. 5887 */ 5888 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5889 } 5890 5891 /* 5892 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5893 */ 5894 void 5895 sctp_pcb_finish(void) 5896 { 5897 struct sctp_vrflist *vrf_bucket; 5898 struct sctp_vrf *vrf, *nvrf; 5899 struct sctp_ifn *ifn, *nifn; 5900 struct sctp_ifa *ifa, *nifa; 5901 struct sctpvtaghead *chain; 5902 struct sctp_tagblock *twait_block, *prev_twait_block; 5903 struct sctp_laddr *wi, *nwi; 5904 int i; 5905 struct sctp_iterator *it, *nit; 5906 5907 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5908 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5909 return; 5910 } 5911 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5912 /* 5913 * In FreeBSD the iterator thread never exits but we do clean up. 5914 * The only way FreeBSD reaches here is if we have VRF's but we 5915 * still add the ifdef to make it compile on old versions. 5916 */ 5917 retry: 5918 SCTP_IPI_ITERATOR_WQ_LOCK(); 5919 /* 5920 * sctp_iterator_worker() might be working on an it entry without 5921 * holding the lock. We won't find it on the list either and 5922 * continue and free/destroy it. While holding the lock, spin, to 5923 * avoid the race condition as sctp_iterator_worker() will have to 5924 * wait to re-aquire the lock. 5925 */ 5926 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5927 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5928 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5929 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5930 DELAY(10); 5931 goto retry; 5932 } 5933 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5934 if (it->vn != curvnet) { 5935 continue; 5936 } 5937 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5938 if (it->function_atend != NULL) { 5939 (*it->function_atend) (it->pointer, it->val); 5940 } 5941 SCTP_FREE(it, SCTP_M_ITER); 5942 } 5943 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5944 SCTP_ITERATOR_LOCK(); 5945 if ((sctp_it_ctl.cur_it) && 5946 (sctp_it_ctl.cur_it->vn == curvnet)) { 5947 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5948 } 5949 SCTP_ITERATOR_UNLOCK(); 5950 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5951 SCTP_WQ_ADDR_LOCK(); 5952 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5953 LIST_REMOVE(wi, sctp_nxt_addr); 5954 SCTP_DECR_LADDR_COUNT(); 5955 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5956 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5957 } 5958 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5959 } 5960 SCTP_WQ_ADDR_UNLOCK(); 5961 5962 /* 5963 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5964 * destroyed first). 5965 */ 5966 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5967 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5968 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5969 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5970 /* free the ifa */ 5971 LIST_REMOVE(ifa, next_bucket); 5972 LIST_REMOVE(ifa, next_ifa); 5973 SCTP_FREE(ifa, SCTP_M_IFA); 5974 } 5975 /* free the ifn */ 5976 LIST_REMOVE(ifn, next_bucket); 5977 LIST_REMOVE(ifn, next_ifn); 5978 SCTP_FREE(ifn, SCTP_M_IFN); 5979 } 5980 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5981 /* free the vrf */ 5982 LIST_REMOVE(vrf, next_vrf); 5983 SCTP_FREE(vrf, SCTP_M_VRF); 5984 } 5985 /* free the vrf hashes */ 5986 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5987 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5988 5989 /* 5990 * free the TIMEWAIT list elements malloc'd in the function 5991 * sctp_add_vtag_to_timewait()... 5992 */ 5993 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5994 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5995 if (!LIST_EMPTY(chain)) { 5996 prev_twait_block = NULL; 5997 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5998 if (prev_twait_block) { 5999 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6000 } 6001 prev_twait_block = twait_block; 6002 } 6003 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6004 } 6005 } 6006 6007 /* free the locks and mutexes */ 6008 #ifdef SCTP_PACKET_LOGGING 6009 SCTP_IP_PKTLOG_DESTROY(); 6010 #endif 6011 SCTP_IPI_ADDR_DESTROY(); 6012 SCTP_STATLOG_DESTROY(); 6013 SCTP_INP_INFO_LOCK_DESTROY(); 6014 6015 SCTP_WQ_ADDR_DESTROY(); 6016 6017 /* Get rid of other stuff too. */ 6018 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6019 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6020 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6021 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6022 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6023 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6024 6025 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6026 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6027 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6028 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6029 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6030 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6031 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6032 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6033 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6034 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6035 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6036 #endif 6037 } 6038 6039 6040 int 6041 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6042 int offset, int limit, 6043 struct sockaddr *src, struct sockaddr *dst, 6044 struct sockaddr *altsa, uint16_t port) 6045 { 6046 /* 6047 * grub through the INIT pulling addresses and loading them to the 6048 * nets structure in the asoc. The from address in the mbuf should 6049 * also be loaded (if it is not already). This routine can be called 6050 * with either INIT or INIT-ACK's as long as the m points to the IP 6051 * packet and the offset points to the beginning of the parameters. 6052 */ 6053 struct sctp_inpcb *inp; 6054 struct sctp_nets *net, *nnet, *net_tmp; 6055 struct sctp_paramhdr *phdr, parm_buf; 6056 struct sctp_tcb *stcb_tmp; 6057 uint16_t ptype, plen; 6058 struct sockaddr *sa; 6059 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6060 struct sctp_auth_random *p_random = NULL; 6061 uint16_t random_len = 0; 6062 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6063 struct sctp_auth_hmac_algo *hmacs = NULL; 6064 uint16_t hmacs_len = 0; 6065 uint8_t saw_asconf = 0; 6066 uint8_t saw_asconf_ack = 0; 6067 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6068 struct sctp_auth_chunk_list *chunks = NULL; 6069 uint16_t num_chunks = 0; 6070 sctp_key_t *new_key; 6071 uint32_t keylen; 6072 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6073 uint8_t peer_supports_ecn; 6074 uint8_t peer_supports_prsctp; 6075 uint8_t peer_supports_auth; 6076 uint8_t peer_supports_asconf; 6077 uint8_t peer_supports_asconf_ack; 6078 uint8_t peer_supports_reconfig; 6079 uint8_t peer_supports_nrsack; 6080 uint8_t peer_supports_pktdrop; 6081 uint8_t peer_supports_idata; 6082 #ifdef INET 6083 struct sockaddr_in sin; 6084 #endif 6085 #ifdef INET6 6086 struct sockaddr_in6 sin6; 6087 #endif 6088 6089 /* First get the destination address setup too. */ 6090 #ifdef INET 6091 memset(&sin, 0, sizeof(sin)); 6092 sin.sin_family = AF_INET; 6093 sin.sin_len = sizeof(sin); 6094 sin.sin_port = stcb->rport; 6095 #endif 6096 #ifdef INET6 6097 memset(&sin6, 0, sizeof(sin6)); 6098 sin6.sin6_family = AF_INET6; 6099 sin6.sin6_len = sizeof(struct sockaddr_in6); 6100 sin6.sin6_port = stcb->rport; 6101 #endif 6102 if (altsa) { 6103 sa = altsa; 6104 } else { 6105 sa = src; 6106 } 6107 peer_supports_idata = 0; 6108 peer_supports_ecn = 0; 6109 peer_supports_prsctp = 0; 6110 peer_supports_auth = 0; 6111 peer_supports_asconf = 0; 6112 peer_supports_reconfig = 0; 6113 peer_supports_nrsack = 0; 6114 peer_supports_pktdrop = 0; 6115 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6116 /* mark all addresses that we have currently on the list */ 6117 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6118 } 6119 /* does the source address already exist? if so skip it */ 6120 inp = stcb->sctp_ep; 6121 atomic_add_int(&stcb->asoc.refcnt, 1); 6122 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6123 atomic_add_int(&stcb->asoc.refcnt, -1); 6124 6125 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6126 /* we must add the source address */ 6127 /* no scope set here since we have a tcb already. */ 6128 switch (sa->sa_family) { 6129 #ifdef INET 6130 case AF_INET: 6131 if (stcb->asoc.scope.ipv4_addr_legal) { 6132 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6133 return (-1); 6134 } 6135 } 6136 break; 6137 #endif 6138 #ifdef INET6 6139 case AF_INET6: 6140 if (stcb->asoc.scope.ipv6_addr_legal) { 6141 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6142 return (-2); 6143 } 6144 } 6145 break; 6146 #endif 6147 default: 6148 break; 6149 } 6150 } else { 6151 if (net_tmp != NULL && stcb_tmp == stcb) { 6152 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6153 } else if (stcb_tmp != stcb) { 6154 /* It belongs to another association? */ 6155 if (stcb_tmp) 6156 SCTP_TCB_UNLOCK(stcb_tmp); 6157 return (-3); 6158 } 6159 } 6160 if (stcb->asoc.state == 0) { 6161 /* the assoc was freed? */ 6162 return (-4); 6163 } 6164 /* now we must go through each of the params. */ 6165 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6166 while (phdr) { 6167 ptype = ntohs(phdr->param_type); 6168 plen = ntohs(phdr->param_length); 6169 /* 6170 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6171 * (uint32_t)ptype, (int)plen); 6172 */ 6173 if (offset + plen > limit) { 6174 break; 6175 } 6176 if (plen == 0) { 6177 break; 6178 } 6179 #ifdef INET 6180 if (ptype == SCTP_IPV4_ADDRESS) { 6181 if (stcb->asoc.scope.ipv4_addr_legal) { 6182 struct sctp_ipv4addr_param *p4, p4_buf; 6183 6184 /* ok get the v4 address and check/add */ 6185 phdr = sctp_get_next_param(m, offset, 6186 (struct sctp_paramhdr *)&p4_buf, 6187 sizeof(p4_buf)); 6188 if (plen != sizeof(struct sctp_ipv4addr_param) || 6189 phdr == NULL) { 6190 return (-5); 6191 } 6192 p4 = (struct sctp_ipv4addr_param *)phdr; 6193 sin.sin_addr.s_addr = p4->addr; 6194 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6195 /* Skip multi-cast addresses */ 6196 goto next_param; 6197 } 6198 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6199 (sin.sin_addr.s_addr == INADDR_ANY)) { 6200 goto next_param; 6201 } 6202 sa = (struct sockaddr *)&sin; 6203 inp = stcb->sctp_ep; 6204 atomic_add_int(&stcb->asoc.refcnt, 1); 6205 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6206 dst, stcb); 6207 atomic_add_int(&stcb->asoc.refcnt, -1); 6208 6209 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6210 inp == NULL) { 6211 /* we must add the source address */ 6212 /* 6213 * no scope set since we have a tcb 6214 * already 6215 */ 6216 6217 /* 6218 * we must validate the state again 6219 * here 6220 */ 6221 add_it_now: 6222 if (stcb->asoc.state == 0) { 6223 /* the assoc was freed? */ 6224 return (-7); 6225 } 6226 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6227 return (-8); 6228 } 6229 } else if (stcb_tmp == stcb) { 6230 if (stcb->asoc.state == 0) { 6231 /* the assoc was freed? */ 6232 return (-10); 6233 } 6234 if (net != NULL) { 6235 /* clear flag */ 6236 net->dest_state &= 6237 ~SCTP_ADDR_NOT_IN_ASSOC; 6238 } 6239 } else { 6240 /* 6241 * strange, address is in another 6242 * assoc? straighten out locks. 6243 */ 6244 if (stcb_tmp) { 6245 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6246 struct mbuf *op_err; 6247 char msg[SCTP_DIAG_INFO_LEN]; 6248 6249 /* 6250 * in setup state we 6251 * abort this guy 6252 */ 6253 snprintf(msg, sizeof(msg), 6254 "%s:%d at %s", __FILE__, __LINE__, __func__); 6255 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6256 msg); 6257 sctp_abort_an_association(stcb_tmp->sctp_ep, 6258 stcb_tmp, op_err, 6259 SCTP_SO_NOT_LOCKED); 6260 goto add_it_now; 6261 } 6262 SCTP_TCB_UNLOCK(stcb_tmp); 6263 } 6264 if (stcb->asoc.state == 0) { 6265 /* the assoc was freed? */ 6266 return (-12); 6267 } 6268 return (-13); 6269 } 6270 } 6271 } else 6272 #endif 6273 #ifdef INET6 6274 if (ptype == SCTP_IPV6_ADDRESS) { 6275 if (stcb->asoc.scope.ipv6_addr_legal) { 6276 /* ok get the v6 address and check/add */ 6277 struct sctp_ipv6addr_param *p6, p6_buf; 6278 6279 phdr = sctp_get_next_param(m, offset, 6280 (struct sctp_paramhdr *)&p6_buf, 6281 sizeof(p6_buf)); 6282 if (plen != sizeof(struct sctp_ipv6addr_param) || 6283 phdr == NULL) { 6284 return (-14); 6285 } 6286 p6 = (struct sctp_ipv6addr_param *)phdr; 6287 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6288 sizeof(p6->addr)); 6289 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6290 /* Skip multi-cast addresses */ 6291 goto next_param; 6292 } 6293 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6294 /* 6295 * Link local make no sense without 6296 * scope 6297 */ 6298 goto next_param; 6299 } 6300 sa = (struct sockaddr *)&sin6; 6301 inp = stcb->sctp_ep; 6302 atomic_add_int(&stcb->asoc.refcnt, 1); 6303 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6304 dst, stcb); 6305 atomic_add_int(&stcb->asoc.refcnt, -1); 6306 if (stcb_tmp == NULL && 6307 (inp == stcb->sctp_ep || inp == NULL)) { 6308 /* 6309 * we must validate the state again 6310 * here 6311 */ 6312 add_it_now6: 6313 if (stcb->asoc.state == 0) { 6314 /* the assoc was freed? */ 6315 return (-16); 6316 } 6317 /* 6318 * we must add the address, no scope 6319 * set 6320 */ 6321 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6322 return (-17); 6323 } 6324 } else if (stcb_tmp == stcb) { 6325 /* 6326 * we must validate the state again 6327 * here 6328 */ 6329 if (stcb->asoc.state == 0) { 6330 /* the assoc was freed? */ 6331 return (-19); 6332 } 6333 if (net != NULL) { 6334 /* clear flag */ 6335 net->dest_state &= 6336 ~SCTP_ADDR_NOT_IN_ASSOC; 6337 } 6338 } else { 6339 /* 6340 * strange, address is in another 6341 * assoc? straighten out locks. 6342 */ 6343 if (stcb_tmp) { 6344 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6345 struct mbuf *op_err; 6346 char msg[SCTP_DIAG_INFO_LEN]; 6347 6348 /* 6349 * in setup state we 6350 * abort this guy 6351 */ 6352 snprintf(msg, sizeof(msg), 6353 "%s:%d at %s", __FILE__, __LINE__, __func__); 6354 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6355 msg); 6356 sctp_abort_an_association(stcb_tmp->sctp_ep, 6357 stcb_tmp, op_err, 6358 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 #ifdef INET 6392 struct sctp_asconf_addrv4_param *fii; 6393 #endif 6394 6395 if (stcb->asoc.asconf_supported == 0) { 6396 return (-100); 6397 } 6398 if (plen > sizeof(lstore)) { 6399 return (-23); 6400 } 6401 phdr = sctp_get_next_param(m, offset, 6402 (struct sctp_paramhdr *)&lstore, 6403 min(plen, sizeof(lstore))); 6404 if (phdr == NULL) { 6405 return (-24); 6406 } 6407 fee = (struct sctp_asconf_addr_param *)phdr; 6408 lptype = ntohs(fee->addrp.ph.param_type); 6409 switch (lptype) { 6410 #ifdef INET 6411 case SCTP_IPV4_ADDRESS: 6412 if (plen != 6413 sizeof(struct sctp_asconf_addrv4_param)) { 6414 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6415 (int)sizeof(struct sctp_asconf_addrv4_param), 6416 plen); 6417 } else { 6418 fii = (struct sctp_asconf_addrv4_param *)fee; 6419 sin.sin_addr.s_addr = fii->addrp.addr; 6420 lsa = (struct sockaddr *)&sin; 6421 } 6422 break; 6423 #endif 6424 #ifdef INET6 6425 case SCTP_IPV6_ADDRESS: 6426 if (plen != 6427 sizeof(struct sctp_asconf_addr_param)) { 6428 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6429 (int)sizeof(struct sctp_asconf_addr_param), 6430 plen); 6431 } else { 6432 memcpy(sin6.sin6_addr.s6_addr, 6433 fee->addrp.addr, 6434 sizeof(fee->addrp.addr)); 6435 lsa = (struct sockaddr *)&sin6; 6436 } 6437 break; 6438 #endif 6439 default: 6440 break; 6441 } 6442 if (lsa) { 6443 (void)sctp_set_primary_addr(stcb, sa, NULL); 6444 } 6445 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6446 stcb->asoc.peer_supports_nat = 1; 6447 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6448 /* Peer supports pr-sctp */ 6449 peer_supports_prsctp = 1; 6450 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6451 /* A supported extension chunk */ 6452 struct sctp_supported_chunk_types_param *pr_supported; 6453 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6454 int num_ent, i; 6455 6456 phdr = sctp_get_next_param(m, offset, 6457 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6458 if (phdr == NULL) { 6459 return (-25); 6460 } 6461 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6462 num_ent = plen - sizeof(struct sctp_paramhdr); 6463 for (i = 0; i < num_ent; i++) { 6464 switch (pr_supported->chunk_types[i]) { 6465 case SCTP_ASCONF: 6466 peer_supports_asconf = 1; 6467 break; 6468 case SCTP_ASCONF_ACK: 6469 peer_supports_asconf_ack = 1; 6470 break; 6471 case SCTP_FORWARD_CUM_TSN: 6472 peer_supports_prsctp = 1; 6473 break; 6474 case SCTP_PACKET_DROPPED: 6475 peer_supports_pktdrop = 1; 6476 break; 6477 case SCTP_NR_SELECTIVE_ACK: 6478 peer_supports_nrsack = 1; 6479 break; 6480 case SCTP_STREAM_RESET: 6481 peer_supports_reconfig = 1; 6482 break; 6483 case SCTP_AUTHENTICATION: 6484 peer_supports_auth = 1; 6485 break; 6486 case SCTP_IDATA: 6487 peer_supports_idata = 1; 6488 break; 6489 default: 6490 /* one I have not learned yet */ 6491 break; 6492 6493 } 6494 } 6495 } else if (ptype == SCTP_RANDOM) { 6496 if (plen > sizeof(random_store)) 6497 break; 6498 if (got_random) { 6499 /* already processed a RANDOM */ 6500 goto next_param; 6501 } 6502 phdr = sctp_get_next_param(m, offset, 6503 (struct sctp_paramhdr *)random_store, 6504 min(sizeof(random_store), plen)); 6505 if (phdr == NULL) 6506 return (-26); 6507 p_random = (struct sctp_auth_random *)phdr; 6508 random_len = plen - sizeof(*p_random); 6509 /* enforce the random length */ 6510 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6511 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6512 return (-27); 6513 } 6514 got_random = 1; 6515 } else if (ptype == SCTP_HMAC_LIST) { 6516 uint16_t num_hmacs; 6517 uint16_t i; 6518 6519 if (plen > sizeof(hmacs_store)) 6520 break; 6521 if (got_hmacs) { 6522 /* already processed a HMAC list */ 6523 goto next_param; 6524 } 6525 phdr = sctp_get_next_param(m, offset, 6526 (struct sctp_paramhdr *)hmacs_store, 6527 min(plen, sizeof(hmacs_store))); 6528 if (phdr == NULL) 6529 return (-28); 6530 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6531 hmacs_len = plen - sizeof(*hmacs); 6532 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6533 /* validate the hmac list */ 6534 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6535 return (-29); 6536 } 6537 if (stcb->asoc.peer_hmacs != NULL) 6538 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6539 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6540 if (stcb->asoc.peer_hmacs != NULL) { 6541 for (i = 0; i < num_hmacs; i++) { 6542 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6543 ntohs(hmacs->hmac_ids[i])); 6544 } 6545 } 6546 got_hmacs = 1; 6547 } else if (ptype == SCTP_CHUNK_LIST) { 6548 int i; 6549 6550 if (plen > sizeof(chunks_store)) 6551 break; 6552 if (got_chklist) { 6553 /* already processed a Chunks list */ 6554 goto next_param; 6555 } 6556 phdr = sctp_get_next_param(m, offset, 6557 (struct sctp_paramhdr *)chunks_store, 6558 min(plen, sizeof(chunks_store))); 6559 if (phdr == NULL) 6560 return (-30); 6561 chunks = (struct sctp_auth_chunk_list *)phdr; 6562 num_chunks = plen - sizeof(*chunks); 6563 if (stcb->asoc.peer_auth_chunks != NULL) 6564 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6565 else 6566 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6567 for (i = 0; i < num_chunks; i++) { 6568 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6569 stcb->asoc.peer_auth_chunks); 6570 /* record asconf/asconf-ack if listed */ 6571 if (chunks->chunk_types[i] == SCTP_ASCONF) 6572 saw_asconf = 1; 6573 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6574 saw_asconf_ack = 1; 6575 6576 } 6577 got_chklist = 1; 6578 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6579 (ptype == SCTP_STATE_COOKIE) || 6580 (ptype == SCTP_UNRECOG_PARAM) || 6581 (ptype == SCTP_COOKIE_PRESERVE) || 6582 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6583 (ptype == SCTP_ADD_IP_ADDRESS) || 6584 (ptype == SCTP_DEL_IP_ADDRESS) || 6585 (ptype == SCTP_ERROR_CAUSE_IND) || 6586 (ptype == SCTP_SUCCESS_REPORT)) { 6587 /* don't care */ ; 6588 } else { 6589 if ((ptype & 0x8000) == 0x0000) { 6590 /* 6591 * must stop processing the rest of the 6592 * param's. Any report bits were handled 6593 * with the call to 6594 * sctp_arethere_unrecognized_parameters() 6595 * when the INIT or INIT-ACK was first seen. 6596 */ 6597 break; 6598 } 6599 } 6600 6601 next_param: 6602 offset += SCTP_SIZE32(plen); 6603 if (offset >= limit) { 6604 break; 6605 } 6606 phdr = sctp_get_next_param(m, offset, &parm_buf, 6607 sizeof(parm_buf)); 6608 } 6609 /* Now check to see if we need to purge any addresses */ 6610 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6611 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6612 SCTP_ADDR_NOT_IN_ASSOC) { 6613 /* This address has been removed from the asoc */ 6614 /* remove and free it */ 6615 stcb->asoc.numnets--; 6616 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6617 sctp_free_remote_addr(net); 6618 if (net == stcb->asoc.primary_destination) { 6619 stcb->asoc.primary_destination = NULL; 6620 sctp_select_primary_destination(stcb); 6621 } 6622 } 6623 } 6624 if ((stcb->asoc.ecn_supported == 1) && 6625 (peer_supports_ecn == 0)) { 6626 stcb->asoc.ecn_supported = 0; 6627 } 6628 if ((stcb->asoc.prsctp_supported == 1) && 6629 (peer_supports_prsctp == 0)) { 6630 stcb->asoc.prsctp_supported = 0; 6631 } 6632 if ((stcb->asoc.auth_supported == 1) && 6633 ((peer_supports_auth == 0) || 6634 (got_random == 0) || (got_hmacs == 0))) { 6635 stcb->asoc.auth_supported = 0; 6636 } 6637 if ((stcb->asoc.asconf_supported == 1) && 6638 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6639 (stcb->asoc.auth_supported == 0) || 6640 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6641 stcb->asoc.asconf_supported = 0; 6642 } 6643 if ((stcb->asoc.reconfig_supported == 1) && 6644 (peer_supports_reconfig == 0)) { 6645 stcb->asoc.reconfig_supported = 0; 6646 } 6647 if ((stcb->asoc.idata_supported == 1) && 6648 (peer_supports_idata == 0)) { 6649 stcb->asoc.idata_supported = 0; 6650 } 6651 if ((stcb->asoc.nrsack_supported == 1) && 6652 (peer_supports_nrsack == 0)) { 6653 stcb->asoc.nrsack_supported = 0; 6654 } 6655 if ((stcb->asoc.pktdrop_supported == 1) && 6656 (peer_supports_pktdrop == 0)) { 6657 stcb->asoc.pktdrop_supported = 0; 6658 } 6659 /* validate authentication required parameters */ 6660 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6661 /* peer does not support auth but sent a chunks list? */ 6662 return (-31); 6663 } 6664 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6665 /* peer supports asconf but not auth? */ 6666 return (-32); 6667 } else if ((peer_supports_asconf == 1) && 6668 (peer_supports_auth == 1) && 6669 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6670 return (-33); 6671 } 6672 /* concatenate the full random key */ 6673 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6674 if (chunks != NULL) { 6675 keylen += sizeof(*chunks) + num_chunks; 6676 } 6677 new_key = sctp_alloc_key(keylen); 6678 if (new_key != NULL) { 6679 /* copy in the RANDOM */ 6680 if (p_random != NULL) { 6681 keylen = sizeof(*p_random) + random_len; 6682 bcopy(p_random, new_key->key, keylen); 6683 } 6684 /* append in the AUTH chunks */ 6685 if (chunks != NULL) { 6686 bcopy(chunks, new_key->key + keylen, 6687 sizeof(*chunks) + num_chunks); 6688 keylen += sizeof(*chunks) + num_chunks; 6689 } 6690 /* append in the HMACs */ 6691 if (hmacs != NULL) { 6692 bcopy(hmacs, new_key->key + keylen, 6693 sizeof(*hmacs) + hmacs_len); 6694 } 6695 } else { 6696 /* failed to get memory for the key */ 6697 return (-34); 6698 } 6699 if (stcb->asoc.authinfo.peer_random != NULL) 6700 sctp_free_key(stcb->asoc.authinfo.peer_random); 6701 stcb->asoc.authinfo.peer_random = new_key; 6702 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6703 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6704 6705 return (0); 6706 } 6707 6708 int 6709 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6710 struct sctp_nets *net) 6711 { 6712 /* make sure the requested primary address exists in the assoc */ 6713 if (net == NULL && sa) 6714 net = sctp_findnet(stcb, sa); 6715 6716 if (net == NULL) { 6717 /* didn't find the requested primary address! */ 6718 return (-1); 6719 } else { 6720 /* set the primary address */ 6721 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6722 /* Must be confirmed, so queue to set */ 6723 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6724 return (0); 6725 } 6726 stcb->asoc.primary_destination = net; 6727 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6728 sctp_free_remote_addr(stcb->asoc.alternate); 6729 stcb->asoc.alternate = NULL; 6730 } 6731 net = TAILQ_FIRST(&stcb->asoc.nets); 6732 if (net != stcb->asoc.primary_destination) { 6733 /* 6734 * first one on the list is NOT the primary 6735 * sctp_cmpaddr() is much more efficient if the 6736 * primary is the first on the list, make it so. 6737 */ 6738 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6739 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6740 } 6741 return (0); 6742 } 6743 } 6744 6745 int 6746 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6747 { 6748 /* 6749 * This function serves two purposes. It will see if a TAG can be 6750 * re-used and return 1 for yes it is ok and 0 for don't use that 6751 * tag. A secondary function it will do is purge out old tags that 6752 * can be removed. 6753 */ 6754 struct sctpvtaghead *chain; 6755 struct sctp_tagblock *twait_block; 6756 struct sctpasochead *head; 6757 struct sctp_tcb *stcb; 6758 int i; 6759 6760 SCTP_INP_INFO_RLOCK(); 6761 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6762 SCTP_BASE_INFO(hashasocmark))]; 6763 LIST_FOREACH(stcb, head, sctp_asocs) { 6764 /* 6765 * We choose not to lock anything here. TCB's can't be 6766 * removed since we have the read lock, so they can't be 6767 * freed on us, same thing for the INP. I may be wrong with 6768 * this assumption, but we will go with it for now :-) 6769 */ 6770 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6771 continue; 6772 } 6773 if (stcb->asoc.my_vtag == tag) { 6774 /* candidate */ 6775 if (stcb->rport != rport) { 6776 continue; 6777 } 6778 if (stcb->sctp_ep->sctp_lport != lport) { 6779 continue; 6780 } 6781 /* Its a used tag set */ 6782 SCTP_INP_INFO_RUNLOCK(); 6783 return (0); 6784 } 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 6817 static void 6818 sctp_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 /* Ok that was fun, now we will drain all the inbound streams? */ 6843 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6844 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next_instrm, nctl) { 6845 #ifdef INVARIANTS 6846 if (ctl->on_strm_q != SCTP_ON_ORDERED) { 6847 panic("Huh control: %p on_q: %d -- not ordered?", 6848 ctl, ctl->on_strm_q); 6849 } 6850 #endif 6851 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6852 /* Yep it is above cum-ack */ 6853 cnt++; 6854 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6855 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6856 sctp_ucount_decr(asoc->cnt_on_all_streams); 6857 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6858 if (ctl->on_read_q) { 6859 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next); 6860 ctl->on_read_q = 0; 6861 } 6862 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next_instrm); 6863 ctl->on_strm_q = 0; 6864 if (ctl->data) { 6865 sctp_m_freem(ctl->data); 6866 ctl->data = NULL; 6867 } 6868 sctp_free_remote_addr(ctl->whoFrom); 6869 /* Now its reasm? */ 6870 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 6871 cnt++; 6872 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6873 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6874 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6875 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6876 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 6877 if (chk->data) { 6878 sctp_m_freem(chk->data); 6879 chk->data = NULL; 6880 } 6881 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6882 } 6883 sctp_free_a_readq(stcb, ctl); 6884 } 6885 } 6886 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].uno_inqueue, next_instrm, nctl) { 6887 #ifdef INVARIANTS 6888 if (ctl->on_strm_q != SCTP_ON_UNORDERED) { 6889 panic("Huh control: %p on_q: %d -- not unordered?", 6890 ctl, ctl->on_strm_q); 6891 } 6892 #endif 6893 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6894 /* Yep it is above cum-ack */ 6895 cnt++; 6896 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6897 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6898 sctp_ucount_decr(asoc->cnt_on_all_streams); 6899 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6900 if (ctl->on_read_q) { 6901 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next); 6902 ctl->on_read_q = 0; 6903 } 6904 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, ctl, next_instrm); 6905 ctl->on_strm_q = 0; 6906 if (ctl->data) { 6907 sctp_m_freem(ctl->data); 6908 ctl->data = NULL; 6909 } 6910 sctp_free_remote_addr(ctl->whoFrom); 6911 /* Now its reasm? */ 6912 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 6913 cnt++; 6914 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6915 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6916 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6917 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6918 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 6919 if (chk->data) { 6920 sctp_m_freem(chk->data); 6921 chk->data = NULL; 6922 } 6923 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6924 } 6925 sctp_free_a_readq(stcb, ctl); 6926 } 6927 } 6928 } 6929 if (cnt) { 6930 /* We must back down to see what the new highest is */ 6931 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6932 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6933 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6934 asoc->highest_tsn_inside_map = i; 6935 fnd = 1; 6936 break; 6937 } 6938 } 6939 if (!fnd) { 6940 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6941 } 6942 /* 6943 * Question, should we go through the delivery queue? The 6944 * only reason things are on here is the app not reading OR 6945 * a p-d-api up. An attacker COULD send enough in to 6946 * initiate the PD-API and then send a bunch of stuff to 6947 * other streams... these would wind up on the delivery 6948 * queue.. and then we would not get to them. But in order 6949 * to do this I then have to back-track and un-deliver 6950 * sequence numbers in streams.. el-yucko. I think for now 6951 * we will NOT look at the delivery queue and leave it to be 6952 * something to consider later. An alternative would be to 6953 * abort the P-D-API with a notification and then deliver 6954 * the data.... Or another method might be to keep track of 6955 * how many times the situation occurs and if we see a 6956 * possible attack underway just abort the association. 6957 */ 6958 #ifdef SCTP_DEBUG 6959 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6960 #endif 6961 /* 6962 * Now do we need to find a new 6963 * asoc->highest_tsn_inside_map? 6964 */ 6965 asoc->last_revoke_count = cnt; 6966 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6967 /* sa_ignore NO_NULL_CHK */ 6968 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6969 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6970 } 6971 /* 6972 * Another issue, in un-setting the TSN's in the mapping array we 6973 * DID NOT adjust the highest_tsn marker. This will cause one of 6974 * two things to occur. It may cause us to do extra work in checking 6975 * for our mapping array movement. More importantly it may cause us 6976 * to SACK every datagram. This may not be a bad thing though since 6977 * we will recover once we get our cum-ack above and all this stuff 6978 * we dumped recovered. 6979 */ 6980 } 6981 6982 void 6983 sctp_drain() 6984 { 6985 /* 6986 * We must walk the PCB lists for ALL associations here. The system 6987 * is LOW on MBUF's and needs help. This is where reneging will 6988 * occur. We really hope this does NOT happen! 6989 */ 6990 VNET_ITERATOR_DECL(vnet_iter); 6991 VNET_LIST_RLOCK_NOSLEEP(); 6992 VNET_FOREACH(vnet_iter) { 6993 CURVNET_SET(vnet_iter); 6994 struct sctp_inpcb *inp; 6995 struct sctp_tcb *stcb; 6996 6997 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6998 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6999 #ifdef VIMAGE 7000 continue; 7001 #else 7002 return; 7003 #endif 7004 } 7005 SCTP_INP_INFO_RLOCK(); 7006 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7007 /* For each endpoint */ 7008 SCTP_INP_RLOCK(inp); 7009 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7010 /* For each association */ 7011 SCTP_TCB_LOCK(stcb); 7012 sctp_drain_mbufs(stcb); 7013 SCTP_TCB_UNLOCK(stcb); 7014 } 7015 SCTP_INP_RUNLOCK(inp); 7016 } 7017 SCTP_INP_INFO_RUNLOCK(); 7018 CURVNET_RESTORE(); 7019 } 7020 VNET_LIST_RUNLOCK_NOSLEEP(); 7021 } 7022 7023 /* 7024 * start a new iterator 7025 * iterates through all endpoints and associations based on the pcb_state 7026 * flags and asoc_state. "af" (mandatory) is executed for all matching 7027 * assocs and "ef" (optional) is executed when the iterator completes. 7028 * "inpf" (optional) is executed for each new endpoint as it is being 7029 * iterated through. inpe (optional) is called when the inp completes 7030 * its way through all the stcbs. 7031 */ 7032 int 7033 sctp_initiate_iterator(inp_func inpf, 7034 asoc_func af, 7035 inp_func inpe, 7036 uint32_t pcb_state, 7037 uint32_t pcb_features, 7038 uint32_t asoc_state, 7039 void *argp, 7040 uint32_t argi, 7041 end_func ef, 7042 struct sctp_inpcb *s_inp, 7043 uint8_t chunk_output_off) 7044 { 7045 struct sctp_iterator *it = NULL; 7046 7047 if (af == NULL) { 7048 return (-1); 7049 } 7050 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7051 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7052 SCTP_BASE_VAR(sctp_pcb_initialized)); 7053 return (-1); 7054 } 7055 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7056 SCTP_M_ITER); 7057 if (it == NULL) { 7058 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7059 return (ENOMEM); 7060 } 7061 memset(it, 0, sizeof(*it)); 7062 it->function_assoc = af; 7063 it->function_inp = inpf; 7064 if (inpf) 7065 it->done_current_ep = 0; 7066 else 7067 it->done_current_ep = 1; 7068 it->function_atend = ef; 7069 it->pointer = argp; 7070 it->val = argi; 7071 it->pcb_flags = pcb_state; 7072 it->pcb_features = pcb_features; 7073 it->asoc_state = asoc_state; 7074 it->function_inp_end = inpe; 7075 it->no_chunk_output = chunk_output_off; 7076 it->vn = curvnet; 7077 if (s_inp) { 7078 /* Assume lock is held here */ 7079 it->inp = s_inp; 7080 SCTP_INP_INCR_REF(it->inp); 7081 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7082 } else { 7083 SCTP_INP_INFO_RLOCK(); 7084 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7085 if (it->inp) { 7086 SCTP_INP_INCR_REF(it->inp); 7087 } 7088 SCTP_INP_INFO_RUNLOCK(); 7089 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7090 7091 } 7092 SCTP_IPI_ITERATOR_WQ_LOCK(); 7093 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7094 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7095 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7096 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7097 SCTP_FREE(it, SCTP_M_ITER); 7098 return (-1); 7099 } 7100 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7101 if (sctp_it_ctl.iterator_running == 0) { 7102 sctp_wakeup_iterator(); 7103 } 7104 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7105 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7106 return (0); 7107 } 7108