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 /* Update the endpoint 1216 * pointer */ 1217 *inp_p = inp; 1218 SCTP_INP_RUNLOCK(inp); 1219 return (stcb); 1220 } 1221 break; 1222 } 1223 #endif 1224 #ifdef INET6 1225 case AF_INET6: 1226 { 1227 struct sockaddr_in6 *sin6, *rsin6; 1228 1229 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1230 rsin6 = (struct sockaddr_in6 *)from; 1231 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1232 rsin6)) { 1233 /* found it */ 1234 if (netp != NULL) { 1235 *netp = net; 1236 } 1237 /* Update the endpoint 1238 * pointer */ 1239 *inp_p = inp; 1240 SCTP_INP_RUNLOCK(inp); 1241 return (stcb); 1242 } 1243 break; 1244 } 1245 #endif 1246 default: 1247 /* TSNH */ 1248 break; 1249 } 1250 } 1251 SCTP_TCB_UNLOCK(stcb); 1252 SCTP_INP_RUNLOCK(inp); 1253 } 1254 return (NULL); 1255 } 1256 1257 1258 /* 1259 * rules for use 1260 * 1261 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1262 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1263 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1264 * NULL. 1265 */ 1266 1267 struct sctp_tcb * 1268 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1269 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1270 { 1271 struct sctpasochead *head; 1272 struct sctp_inpcb *inp; 1273 struct sctp_tcb *stcb = NULL; 1274 struct sctp_nets *net; 1275 uint16_t rport; 1276 1277 inp = *inp_p; 1278 switch (remote->sa_family) { 1279 #ifdef INET 1280 case AF_INET: 1281 rport = (((struct sockaddr_in *)remote)->sin_port); 1282 break; 1283 #endif 1284 #ifdef INET6 1285 case AF_INET6: 1286 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1287 break; 1288 #endif 1289 default: 1290 return (NULL); 1291 } 1292 if (locked_tcb) { 1293 /* 1294 * UN-lock so we can do proper locking here this occurs when 1295 * called from load_addresses_from_init. 1296 */ 1297 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1298 SCTP_TCB_UNLOCK(locked_tcb); 1299 } 1300 SCTP_INP_INFO_RLOCK(); 1301 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1302 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1303 /*- 1304 * Now either this guy is our listener or it's the 1305 * connector. If it is the one that issued the connect, then 1306 * it's only chance is to be the first TCB in the list. If 1307 * it is the acceptor, then do the special_lookup to hash 1308 * and find the real inp. 1309 */ 1310 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1311 /* to is peer addr, from is my addr */ 1312 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1313 netp, inp->def_vrf_id); 1314 if ((stcb != NULL) && (locked_tcb == NULL)) { 1315 /* we have a locked tcb, lower refcount */ 1316 SCTP_INP_DECR_REF(inp); 1317 } 1318 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1319 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1320 SCTP_TCB_LOCK(locked_tcb); 1321 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1322 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1323 } 1324 SCTP_INP_INFO_RUNLOCK(); 1325 return (stcb); 1326 } else { 1327 SCTP_INP_WLOCK(inp); 1328 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1329 goto null_return; 1330 } 1331 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1332 if (stcb == NULL) { 1333 goto null_return; 1334 } 1335 SCTP_TCB_LOCK(stcb); 1336 1337 if (stcb->rport != rport) { 1338 /* remote port does not match. */ 1339 SCTP_TCB_UNLOCK(stcb); 1340 goto null_return; 1341 } 1342 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1343 SCTP_TCB_UNLOCK(stcb); 1344 goto null_return; 1345 } 1346 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 /* now look at the list of remote addresses */ 1351 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1352 #ifdef INVARIANTS 1353 if (net == (TAILQ_NEXT(net, sctp_next))) { 1354 panic("Corrupt net list"); 1355 } 1356 #endif 1357 if (net->ro._l_addr.sa.sa_family != 1358 remote->sa_family) { 1359 /* not the same family */ 1360 continue; 1361 } 1362 switch (remote->sa_family) { 1363 #ifdef INET 1364 case AF_INET: 1365 { 1366 struct sockaddr_in *sin, 1367 *rsin; 1368 1369 sin = (struct sockaddr_in *) 1370 &net->ro._l_addr; 1371 rsin = (struct sockaddr_in *)remote; 1372 if (sin->sin_addr.s_addr == 1373 rsin->sin_addr.s_addr) { 1374 /* found it */ 1375 if (netp != NULL) { 1376 *netp = net; 1377 } 1378 if (locked_tcb == NULL) { 1379 SCTP_INP_DECR_REF(inp); 1380 } else if (locked_tcb != stcb) { 1381 SCTP_TCB_LOCK(locked_tcb); 1382 } 1383 if (locked_tcb) { 1384 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1385 } 1386 SCTP_INP_WUNLOCK(inp); 1387 SCTP_INP_INFO_RUNLOCK(); 1388 return (stcb); 1389 } 1390 break; 1391 } 1392 #endif 1393 #ifdef INET6 1394 case AF_INET6: 1395 { 1396 struct sockaddr_in6 *sin6, 1397 *rsin6; 1398 1399 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1400 rsin6 = (struct sockaddr_in6 *)remote; 1401 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1402 rsin6)) { 1403 /* found it */ 1404 if (netp != NULL) { 1405 *netp = net; 1406 } 1407 if (locked_tcb == NULL) { 1408 SCTP_INP_DECR_REF(inp); 1409 } else if (locked_tcb != stcb) { 1410 SCTP_TCB_LOCK(locked_tcb); 1411 } 1412 if (locked_tcb) { 1413 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1414 } 1415 SCTP_INP_WUNLOCK(inp); 1416 SCTP_INP_INFO_RUNLOCK(); 1417 return (stcb); 1418 } 1419 break; 1420 } 1421 #endif 1422 default: 1423 /* TSNH */ 1424 break; 1425 } 1426 } 1427 SCTP_TCB_UNLOCK(stcb); 1428 } 1429 } else { 1430 SCTP_INP_WLOCK(inp); 1431 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1432 goto null_return; 1433 } 1434 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1435 inp->sctp_hashmark)]; 1436 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1437 if (stcb->rport != rport) { 1438 /* remote port does not match */ 1439 continue; 1440 } 1441 SCTP_TCB_LOCK(stcb); 1442 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1443 SCTP_TCB_UNLOCK(stcb); 1444 continue; 1445 } 1446 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1447 SCTP_TCB_UNLOCK(stcb); 1448 continue; 1449 } 1450 /* now look at the list of remote addresses */ 1451 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1452 #ifdef INVARIANTS 1453 if (net == (TAILQ_NEXT(net, sctp_next))) { 1454 panic("Corrupt net list"); 1455 } 1456 #endif 1457 if (net->ro._l_addr.sa.sa_family != 1458 remote->sa_family) { 1459 /* not the same family */ 1460 continue; 1461 } 1462 switch (remote->sa_family) { 1463 #ifdef INET 1464 case AF_INET: 1465 { 1466 struct sockaddr_in *sin, 1467 *rsin; 1468 1469 sin = (struct sockaddr_in *) 1470 &net->ro._l_addr; 1471 rsin = (struct sockaddr_in *)remote; 1472 if (sin->sin_addr.s_addr == 1473 rsin->sin_addr.s_addr) { 1474 /* found it */ 1475 if (netp != NULL) { 1476 *netp = net; 1477 } 1478 if (locked_tcb == NULL) { 1479 SCTP_INP_DECR_REF(inp); 1480 } else if (locked_tcb != stcb) { 1481 SCTP_TCB_LOCK(locked_tcb); 1482 } 1483 if (locked_tcb) { 1484 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1485 } 1486 SCTP_INP_WUNLOCK(inp); 1487 SCTP_INP_INFO_RUNLOCK(); 1488 return (stcb); 1489 } 1490 break; 1491 } 1492 #endif 1493 #ifdef INET6 1494 case AF_INET6: 1495 { 1496 struct sockaddr_in6 *sin6, 1497 *rsin6; 1498 1499 sin6 = (struct sockaddr_in6 *) 1500 &net->ro._l_addr; 1501 rsin6 = (struct sockaddr_in6 *)remote; 1502 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1503 rsin6)) { 1504 /* found it */ 1505 if (netp != NULL) { 1506 *netp = net; 1507 } 1508 if (locked_tcb == NULL) { 1509 SCTP_INP_DECR_REF(inp); 1510 } else if (locked_tcb != stcb) { 1511 SCTP_TCB_LOCK(locked_tcb); 1512 } 1513 if (locked_tcb) { 1514 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1515 } 1516 SCTP_INP_WUNLOCK(inp); 1517 SCTP_INP_INFO_RUNLOCK(); 1518 return (stcb); 1519 } 1520 break; 1521 } 1522 #endif 1523 default: 1524 /* TSNH */ 1525 break; 1526 } 1527 } 1528 SCTP_TCB_UNLOCK(stcb); 1529 } 1530 } 1531 null_return: 1532 /* clean up for returning null */ 1533 if (locked_tcb) { 1534 SCTP_TCB_LOCK(locked_tcb); 1535 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1536 } 1537 SCTP_INP_WUNLOCK(inp); 1538 SCTP_INP_INFO_RUNLOCK(); 1539 /* not found */ 1540 return (NULL); 1541 } 1542 1543 1544 /* 1545 * Find an association for a specific endpoint using the association id given 1546 * out in the COMM_UP notification 1547 */ 1548 struct sctp_tcb * 1549 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1550 { 1551 /* 1552 * Use my the assoc_id to find a endpoint 1553 */ 1554 struct sctpasochead *head; 1555 struct sctp_tcb *stcb; 1556 uint32_t id; 1557 1558 if (inp == NULL) { 1559 SCTP_PRINTF("TSNH ep_associd\n"); 1560 return (NULL); 1561 } 1562 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1563 SCTP_PRINTF("TSNH ep_associd0\n"); 1564 return (NULL); 1565 } 1566 id = (uint32_t) asoc_id; 1567 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1568 if (head == NULL) { 1569 /* invalid id TSNH */ 1570 SCTP_PRINTF("TSNH ep_associd1\n"); 1571 return (NULL); 1572 } 1573 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1574 if (stcb->asoc.assoc_id == id) { 1575 if (inp != stcb->sctp_ep) { 1576 /* 1577 * some other guy has the same id active (id 1578 * collision ??). 1579 */ 1580 SCTP_PRINTF("TSNH ep_associd2\n"); 1581 continue; 1582 } 1583 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1584 continue; 1585 } 1586 if (want_lock) { 1587 SCTP_TCB_LOCK(stcb); 1588 } 1589 return (stcb); 1590 } 1591 } 1592 return (NULL); 1593 } 1594 1595 1596 struct sctp_tcb * 1597 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1598 { 1599 struct sctp_tcb *stcb; 1600 1601 SCTP_INP_RLOCK(inp); 1602 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1603 SCTP_INP_RUNLOCK(inp); 1604 return (stcb); 1605 } 1606 1607 1608 /* 1609 * Endpoint probe expects that the INP_INFO is locked. 1610 */ 1611 static struct sctp_inpcb * 1612 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1613 uint16_t lport, uint32_t vrf_id) 1614 { 1615 struct sctp_inpcb *inp; 1616 struct sctp_laddr *laddr; 1617 #ifdef INET 1618 struct sockaddr_in *sin; 1619 #endif 1620 #ifdef INET6 1621 struct sockaddr_in6 *sin6; 1622 struct sockaddr_in6 *intf_addr6; 1623 #endif 1624 int fnd; 1625 1626 #ifdef INET 1627 sin = NULL; 1628 #endif 1629 #ifdef INET6 1630 sin6 = NULL; 1631 #endif 1632 switch (nam->sa_family) { 1633 #ifdef INET 1634 case AF_INET: 1635 sin = (struct sockaddr_in *)nam; 1636 break; 1637 #endif 1638 #ifdef INET6 1639 case AF_INET6: 1640 sin6 = (struct sockaddr_in6 *)nam; 1641 break; 1642 #endif 1643 default: 1644 /* unsupported family */ 1645 return (NULL); 1646 } 1647 1648 if (head == NULL) 1649 return (NULL); 1650 1651 LIST_FOREACH(inp, head, sctp_hash) { 1652 SCTP_INP_RLOCK(inp); 1653 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1654 SCTP_INP_RUNLOCK(inp); 1655 continue; 1656 } 1657 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1658 (inp->sctp_lport == lport)) { 1659 /* got it */ 1660 switch (nam->sa_family) { 1661 #ifdef INET 1662 case AF_INET: 1663 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1664 SCTP_IPV6_V6ONLY(inp)) { 1665 /* IPv4 on a IPv6 socket with ONLY 1666 * IPv6 set */ 1667 SCTP_INP_RUNLOCK(inp); 1668 continue; 1669 } 1670 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1671 &sin->sin_addr) != 0) { 1672 SCTP_INP_RUNLOCK(inp); 1673 continue; 1674 } 1675 break; 1676 #endif 1677 #ifdef INET6 1678 case AF_INET6: 1679 /* A V6 address and the endpoint is NOT 1680 * bound V6 */ 1681 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1682 SCTP_INP_RUNLOCK(inp); 1683 continue; 1684 } 1685 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1686 &sin6->sin6_addr) != 0) { 1687 SCTP_INP_RUNLOCK(inp); 1688 continue; 1689 } 1690 break; 1691 #endif 1692 default: 1693 break; 1694 } 1695 /* does a VRF id match? */ 1696 fnd = 0; 1697 if (inp->def_vrf_id == vrf_id) 1698 fnd = 1; 1699 1700 SCTP_INP_RUNLOCK(inp); 1701 if (!fnd) 1702 continue; 1703 return (inp); 1704 } 1705 SCTP_INP_RUNLOCK(inp); 1706 } 1707 switch (nam->sa_family) { 1708 #ifdef INET 1709 case AF_INET: 1710 if (sin->sin_addr.s_addr == INADDR_ANY) { 1711 /* Can't hunt for one that has no address specified */ 1712 return (NULL); 1713 } 1714 break; 1715 #endif 1716 #ifdef INET6 1717 case AF_INET6: 1718 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1719 /* Can't hunt for one that has no address specified */ 1720 return (NULL); 1721 } 1722 break; 1723 #endif 1724 default: 1725 break; 1726 } 1727 /* 1728 * ok, not bound to all so see if we can find a EP bound to this 1729 * address. 1730 */ 1731 LIST_FOREACH(inp, head, sctp_hash) { 1732 SCTP_INP_RLOCK(inp); 1733 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1734 SCTP_INP_RUNLOCK(inp); 1735 continue; 1736 } 1737 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1738 SCTP_INP_RUNLOCK(inp); 1739 continue; 1740 } 1741 /* 1742 * Ok this could be a likely candidate, look at all of its 1743 * addresses 1744 */ 1745 if (inp->sctp_lport != lport) { 1746 SCTP_INP_RUNLOCK(inp); 1747 continue; 1748 } 1749 /* does a VRF id match? */ 1750 fnd = 0; 1751 if (inp->def_vrf_id == vrf_id) 1752 fnd = 1; 1753 1754 if (!fnd) { 1755 SCTP_INP_RUNLOCK(inp); 1756 continue; 1757 } 1758 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1759 if (laddr->ifa == NULL) { 1760 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1761 __func__); 1762 continue; 1763 } 1764 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1765 (void *)laddr->ifa); 1766 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1767 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1768 continue; 1769 } 1770 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1771 /* possible, see if it matches */ 1772 switch (nam->sa_family) { 1773 #ifdef INET 1774 case AF_INET: 1775 if (sin->sin_addr.s_addr == 1776 laddr->ifa->address.sin.sin_addr.s_addr) { 1777 SCTP_INP_RUNLOCK(inp); 1778 return (inp); 1779 } 1780 break; 1781 #endif 1782 #ifdef INET6 1783 case AF_INET6: 1784 intf_addr6 = &laddr->ifa->address.sin6; 1785 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1786 intf_addr6)) { 1787 SCTP_INP_RUNLOCK(inp); 1788 return (inp); 1789 } 1790 break; 1791 #endif 1792 } 1793 } 1794 } 1795 SCTP_INP_RUNLOCK(inp); 1796 } 1797 return (NULL); 1798 } 1799 1800 1801 static struct sctp_inpcb * 1802 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1803 { 1804 struct sctppcbhead *head; 1805 struct sctp_inpcb *t_inp; 1806 int fnd; 1807 1808 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1809 SCTP_BASE_INFO(hashmark))]; 1810 LIST_FOREACH(t_inp, head, sctp_hash) { 1811 if (t_inp->sctp_lport != lport) { 1812 continue; 1813 } 1814 /* is it in the VRF in question */ 1815 fnd = 0; 1816 if (t_inp->def_vrf_id == vrf_id) 1817 fnd = 1; 1818 if (!fnd) 1819 continue; 1820 1821 /* This one is in use. */ 1822 /* check the v6/v4 binding issue */ 1823 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1824 SCTP_IPV6_V6ONLY(t_inp)) { 1825 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1826 /* collision in V6 space */ 1827 return (t_inp); 1828 } else { 1829 /* inp is BOUND_V4 no conflict */ 1830 continue; 1831 } 1832 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1833 /* t_inp is bound v4 and v6, conflict always */ 1834 return (t_inp); 1835 } else { 1836 /* t_inp is bound only V4 */ 1837 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1838 SCTP_IPV6_V6ONLY(inp)) { 1839 /* no conflict */ 1840 continue; 1841 } 1842 /* else fall through to conflict */ 1843 } 1844 return (t_inp); 1845 } 1846 return (NULL); 1847 } 1848 1849 1850 int 1851 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1852 { 1853 /* For 1-2-1 with port reuse */ 1854 struct sctppcbhead *head; 1855 struct sctp_inpcb *tinp, *ninp; 1856 1857 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1858 /* only works with port reuse on */ 1859 return (-1); 1860 } 1861 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1862 return (0); 1863 } 1864 SCTP_INP_RUNLOCK(inp); 1865 SCTP_INP_INFO_WLOCK(); 1866 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1867 SCTP_BASE_INFO(hashmark))]; 1868 /* Kick out all non-listeners to the TCP hash */ 1869 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1870 if (tinp->sctp_lport != inp->sctp_lport) { 1871 continue; 1872 } 1873 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1874 continue; 1875 } 1876 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1877 continue; 1878 } 1879 if (tinp->sctp_socket->so_qlimit) { 1880 continue; 1881 } 1882 SCTP_INP_WLOCK(tinp); 1883 LIST_REMOVE(tinp, sctp_hash); 1884 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1885 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1886 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1887 SCTP_INP_WUNLOCK(tinp); 1888 } 1889 SCTP_INP_WLOCK(inp); 1890 /* Pull from where he was */ 1891 LIST_REMOVE(inp, sctp_hash); 1892 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1893 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1894 LIST_INSERT_HEAD(head, inp, sctp_hash); 1895 SCTP_INP_WUNLOCK(inp); 1896 SCTP_INP_RLOCK(inp); 1897 SCTP_INP_INFO_WUNLOCK(); 1898 return (0); 1899 } 1900 1901 1902 struct sctp_inpcb * 1903 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1904 uint32_t vrf_id) 1905 { 1906 /* 1907 * First we check the hash table to see if someone has this port 1908 * bound with just the port. 1909 */ 1910 struct sctp_inpcb *inp; 1911 struct sctppcbhead *head; 1912 int lport; 1913 unsigned int i; 1914 #ifdef INET 1915 struct sockaddr_in *sin; 1916 #endif 1917 #ifdef INET6 1918 struct sockaddr_in6 *sin6; 1919 #endif 1920 1921 switch (nam->sa_family) { 1922 #ifdef INET 1923 case AF_INET: 1924 sin = (struct sockaddr_in *)nam; 1925 lport = sin->sin_port; 1926 break; 1927 #endif 1928 #ifdef INET6 1929 case AF_INET6: 1930 sin6 = (struct sockaddr_in6 *)nam; 1931 lport = sin6->sin6_port; 1932 break; 1933 #endif 1934 default: 1935 return (NULL); 1936 } 1937 /* 1938 * I could cheat here and just cast to one of the types but we will 1939 * do it right. It also provides the check against an Unsupported 1940 * type too. 1941 */ 1942 /* Find the head of the ALLADDR chain */ 1943 if (have_lock == 0) { 1944 SCTP_INP_INFO_RLOCK(); 1945 } 1946 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1947 SCTP_BASE_INFO(hashmark))]; 1948 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1949 1950 /* 1951 * If the TCP model exists it could be that the main listening 1952 * endpoint is gone but there still exists a connected socket for 1953 * this guy. If so we can return the first one that we find. This 1954 * may NOT be the correct one so the caller should be wary on the 1955 * returned INP. Currently the only caller that sets find_tcp_pool 1956 * is in bindx where we are verifying that a user CAN bind the 1957 * address. He either has bound it already, or someone else has, or 1958 * its open to bind, so this is good enough. 1959 */ 1960 if (inp == NULL && find_tcp_pool) { 1961 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1962 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1963 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1964 if (inp) { 1965 break; 1966 } 1967 } 1968 } 1969 if (inp) { 1970 SCTP_INP_INCR_REF(inp); 1971 } 1972 if (have_lock == 0) { 1973 SCTP_INP_INFO_RUNLOCK(); 1974 } 1975 return (inp); 1976 } 1977 1978 1979 /* 1980 * Find an association for an endpoint with the pointer to whom you want to 1981 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1982 * need to change the *to to some other struct like a mbuf... 1983 */ 1984 struct sctp_tcb * 1985 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1986 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1987 uint32_t vrf_id) 1988 { 1989 struct sctp_inpcb *inp = NULL; 1990 struct sctp_tcb *stcb; 1991 1992 SCTP_INP_INFO_RLOCK(); 1993 if (find_tcp_pool) { 1994 if (inp_p != NULL) { 1995 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1996 vrf_id); 1997 } else { 1998 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1999 vrf_id); 2000 } 2001 if (stcb != NULL) { 2002 SCTP_INP_INFO_RUNLOCK(); 2003 return (stcb); 2004 } 2005 } 2006 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2007 if (inp_p != NULL) { 2008 *inp_p = inp; 2009 } 2010 SCTP_INP_INFO_RUNLOCK(); 2011 if (inp == NULL) { 2012 return (NULL); 2013 } 2014 /* 2015 * ok, we have an endpoint, now lets find the assoc for it (if any) 2016 * we now place the source address or from in the to of the find 2017 * endpoint call. Since in reality this chain is used from the 2018 * inbound packet side. 2019 */ 2020 if (inp_p != NULL) { 2021 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2022 NULL); 2023 } else { 2024 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2025 NULL); 2026 } 2027 return (stcb); 2028 } 2029 2030 2031 /* 2032 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2033 * find all addresses that the sender has specified in any address list. Each 2034 * address will be used to lookup the TCB and see if one exits. 2035 */ 2036 static struct sctp_tcb * 2037 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2038 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2039 struct sockaddr *dst) 2040 { 2041 struct sctp_paramhdr *phdr, parm_buf; 2042 #if defined(INET) || defined(INET6) 2043 struct sctp_tcb *stcb; 2044 uint16_t ptype; 2045 #endif 2046 uint16_t plen; 2047 #ifdef INET 2048 struct sockaddr_in sin4; 2049 #endif 2050 #ifdef INET6 2051 struct sockaddr_in6 sin6; 2052 #endif 2053 2054 #ifdef INET 2055 memset(&sin4, 0, sizeof(sin4)); 2056 sin4.sin_len = sizeof(sin4); 2057 sin4.sin_family = AF_INET; 2058 sin4.sin_port = sh->src_port; 2059 #endif 2060 #ifdef INET6 2061 memset(&sin6, 0, sizeof(sin6)); 2062 sin6.sin6_len = sizeof(sin6); 2063 sin6.sin6_family = AF_INET6; 2064 sin6.sin6_port = sh->src_port; 2065 #endif 2066 2067 offset += sizeof(struct sctp_init_chunk); 2068 2069 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2070 while (phdr != NULL) { 2071 /* now we must see if we want the parameter */ 2072 #if defined(INET) || defined(INET6) 2073 ptype = ntohs(phdr->param_type); 2074 #endif 2075 plen = ntohs(phdr->param_length); 2076 if (plen == 0) { 2077 break; 2078 } 2079 #ifdef INET 2080 if (ptype == SCTP_IPV4_ADDRESS && 2081 plen == sizeof(struct sctp_ipv4addr_param)) { 2082 /* Get the rest of the address */ 2083 struct sctp_ipv4addr_param ip4_parm, *p4; 2084 2085 phdr = sctp_get_next_param(m, offset, 2086 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2087 if (phdr == NULL) { 2088 return (NULL); 2089 } 2090 p4 = (struct sctp_ipv4addr_param *)phdr; 2091 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2092 /* look it up */ 2093 stcb = sctp_findassociation_ep_addr(inp_p, 2094 (struct sockaddr *)&sin4, netp, dst, NULL); 2095 if (stcb != NULL) { 2096 return (stcb); 2097 } 2098 } 2099 #endif 2100 #ifdef INET6 2101 if (ptype == SCTP_IPV6_ADDRESS && 2102 plen == sizeof(struct sctp_ipv6addr_param)) { 2103 /* Get the rest of the address */ 2104 struct sctp_ipv6addr_param ip6_parm, *p6; 2105 2106 phdr = sctp_get_next_param(m, offset, 2107 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2108 if (phdr == NULL) { 2109 return (NULL); 2110 } 2111 p6 = (struct sctp_ipv6addr_param *)phdr; 2112 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2113 /* look it up */ 2114 stcb = sctp_findassociation_ep_addr(inp_p, 2115 (struct sockaddr *)&sin6, netp, dst, NULL); 2116 if (stcb != NULL) { 2117 return (stcb); 2118 } 2119 } 2120 #endif 2121 offset += SCTP_SIZE32(plen); 2122 phdr = sctp_get_next_param(m, offset, &parm_buf, 2123 sizeof(parm_buf)); 2124 } 2125 return (NULL); 2126 } 2127 2128 static struct sctp_tcb * 2129 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2130 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2131 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2132 { 2133 /* 2134 * Use my vtag to hash. If we find it we then verify the source addr 2135 * is in the assoc. If all goes well we save a bit on rec of a 2136 * packet. 2137 */ 2138 struct sctpasochead *head; 2139 struct sctp_nets *net; 2140 struct sctp_tcb *stcb; 2141 2142 SCTP_INP_INFO_RLOCK(); 2143 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2144 SCTP_BASE_INFO(hashasocmark))]; 2145 LIST_FOREACH(stcb, head, sctp_asocs) { 2146 SCTP_INP_RLOCK(stcb->sctp_ep); 2147 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2148 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2149 continue; 2150 } 2151 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2152 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2153 continue; 2154 } 2155 SCTP_TCB_LOCK(stcb); 2156 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2157 if (stcb->asoc.my_vtag == vtag) { 2158 /* candidate */ 2159 if (stcb->rport != rport) { 2160 SCTP_TCB_UNLOCK(stcb); 2161 continue; 2162 } 2163 if (stcb->sctp_ep->sctp_lport != lport) { 2164 SCTP_TCB_UNLOCK(stcb); 2165 continue; 2166 } 2167 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2168 SCTP_TCB_UNLOCK(stcb); 2169 continue; 2170 } 2171 /* RRS:Need toaddr check here */ 2172 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2173 /* Endpoint does not own this address */ 2174 SCTP_TCB_UNLOCK(stcb); 2175 continue; 2176 } 2177 if (remote_tag) { 2178 /* If we have both vtags that's all we match 2179 * on */ 2180 if (stcb->asoc.peer_vtag == remote_tag) { 2181 /* 2182 * If both tags match we consider it 2183 * conclusive and check NO 2184 * source/destination addresses 2185 */ 2186 goto conclusive; 2187 } 2188 } 2189 if (skip_src_check) { 2190 conclusive: 2191 if (from) { 2192 *netp = sctp_findnet(stcb, from); 2193 } else { 2194 *netp = NULL; /* unknown */ 2195 } 2196 if (inp_p) 2197 *inp_p = stcb->sctp_ep; 2198 SCTP_INP_INFO_RUNLOCK(); 2199 return (stcb); 2200 } 2201 net = sctp_findnet(stcb, from); 2202 if (net) { 2203 /* yep its him. */ 2204 *netp = net; 2205 SCTP_STAT_INCR(sctps_vtagexpress); 2206 *inp_p = stcb->sctp_ep; 2207 SCTP_INP_INFO_RUNLOCK(); 2208 return (stcb); 2209 } else { 2210 /* 2211 * not him, this should only happen in rare 2212 * cases so I peg it. 2213 */ 2214 SCTP_STAT_INCR(sctps_vtagbogus); 2215 } 2216 } 2217 SCTP_TCB_UNLOCK(stcb); 2218 } 2219 SCTP_INP_INFO_RUNLOCK(); 2220 return (NULL); 2221 } 2222 2223 2224 /* 2225 * Find an association with the pointer to the inbound IP packet. This can be 2226 * a IPv4 or IPv6 packet. 2227 */ 2228 struct sctp_tcb * 2229 sctp_findassociation_addr(struct mbuf *m, int offset, 2230 struct sockaddr *src, struct sockaddr *dst, 2231 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2232 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2233 { 2234 struct sctp_tcb *stcb; 2235 struct sctp_inpcb *inp; 2236 2237 if (sh->v_tag) { 2238 /* we only go down this path if vtag is non-zero */ 2239 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2240 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2241 if (stcb) { 2242 return (stcb); 2243 } 2244 } 2245 if (inp_p) { 2246 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2247 1, vrf_id); 2248 inp = *inp_p; 2249 } else { 2250 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2251 1, vrf_id); 2252 } 2253 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2254 if (stcb == NULL && inp) { 2255 /* Found a EP but not this address */ 2256 if ((ch->chunk_type == SCTP_INITIATION) || 2257 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2258 /*- 2259 * special hook, we do NOT return linp or an 2260 * association that is linked to an existing 2261 * association that is under the TCP pool (i.e. no 2262 * listener exists). The endpoint finding routine 2263 * will always find a listener before examining the 2264 * TCP pool. 2265 */ 2266 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2267 if (inp_p) { 2268 *inp_p = NULL; 2269 } 2270 return (NULL); 2271 } 2272 stcb = sctp_findassociation_special_addr(m, 2273 offset, sh, &inp, netp, dst); 2274 if (inp_p != NULL) { 2275 *inp_p = inp; 2276 } 2277 } 2278 } 2279 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2280 return (stcb); 2281 } 2282 2283 /* 2284 * lookup an association by an ASCONF lookup address. 2285 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2286 */ 2287 struct sctp_tcb * 2288 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2289 struct sockaddr *dst, struct sctphdr *sh, 2290 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2291 { 2292 struct sctp_tcb *stcb; 2293 union sctp_sockstore remote_store; 2294 struct sctp_paramhdr parm_buf, *phdr; 2295 int ptype; 2296 int zero_address = 0; 2297 #ifdef INET 2298 struct sockaddr_in *sin; 2299 #endif 2300 #ifdef INET6 2301 struct sockaddr_in6 *sin6; 2302 #endif 2303 2304 memset(&remote_store, 0, sizeof(remote_store)); 2305 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2306 &parm_buf, sizeof(struct sctp_paramhdr)); 2307 if (phdr == NULL) { 2308 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2309 __func__); 2310 return NULL; 2311 } 2312 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2313 /* get the correlation address */ 2314 switch (ptype) { 2315 #ifdef INET6 2316 case SCTP_IPV6_ADDRESS: 2317 { 2318 /* ipv6 address param */ 2319 struct sctp_ipv6addr_param *p6, p6_buf; 2320 2321 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2322 return NULL; 2323 } 2324 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2325 offset + sizeof(struct sctp_asconf_chunk), 2326 &p6_buf.ph, sizeof(*p6)); 2327 if (p6 == NULL) { 2328 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2329 __func__); 2330 return (NULL); 2331 } 2332 sin6 = &remote_store.sin6; 2333 sin6->sin6_family = AF_INET6; 2334 sin6->sin6_len = sizeof(*sin6); 2335 sin6->sin6_port = sh->src_port; 2336 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2337 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2338 zero_address = 1; 2339 break; 2340 } 2341 #endif 2342 #ifdef INET 2343 case SCTP_IPV4_ADDRESS: 2344 { 2345 /* ipv4 address param */ 2346 struct sctp_ipv4addr_param *p4, p4_buf; 2347 2348 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2349 return NULL; 2350 } 2351 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2352 offset + sizeof(struct sctp_asconf_chunk), 2353 &p4_buf.ph, sizeof(*p4)); 2354 if (p4 == NULL) { 2355 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2356 __func__); 2357 return (NULL); 2358 } 2359 sin = &remote_store.sin; 2360 sin->sin_family = AF_INET; 2361 sin->sin_len = sizeof(*sin); 2362 sin->sin_port = sh->src_port; 2363 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2364 if (sin->sin_addr.s_addr == INADDR_ANY) 2365 zero_address = 1; 2366 break; 2367 } 2368 #endif 2369 default: 2370 /* invalid address param type */ 2371 return NULL; 2372 } 2373 2374 if (zero_address) { 2375 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2376 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2377 if (stcb != NULL) { 2378 SCTP_INP_DECR_REF(*inp_p); 2379 } 2380 } else { 2381 stcb = sctp_findassociation_ep_addr(inp_p, 2382 &remote_store.sa, netp, 2383 dst, NULL); 2384 } 2385 return (stcb); 2386 } 2387 2388 2389 /* 2390 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2391 * addresses. This way if we don't get a bind we by default pick a ephemeral 2392 * port with all addresses bound. 2393 */ 2394 int 2395 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2396 { 2397 /* 2398 * we get called when a new endpoint starts up. We need to allocate 2399 * the sctp_inpcb structure from the zone and init it. Mark it as 2400 * unbound and find a port that we can use as an ephemeral with 2401 * INADDR_ANY. If the user binds later no problem we can then add in 2402 * the specific addresses. And setup the default parameters for the 2403 * EP. 2404 */ 2405 int i, error; 2406 struct sctp_inpcb *inp; 2407 struct sctp_pcb *m; 2408 struct timeval time; 2409 sctp_sharedkey_t *null_key; 2410 2411 error = 0; 2412 2413 SCTP_INP_INFO_WLOCK(); 2414 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2415 if (inp == NULL) { 2416 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2417 SCTP_INP_INFO_WUNLOCK(); 2418 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2419 return (ENOBUFS); 2420 } 2421 /* zap it */ 2422 bzero(inp, sizeof(*inp)); 2423 2424 /* bump generations */ 2425 /* setup socket pointers */ 2426 inp->sctp_socket = so; 2427 inp->ip_inp.inp.inp_socket = so; 2428 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2429 #ifdef INET6 2430 if (INP_SOCKAF(so) == AF_INET6) { 2431 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2432 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2433 } 2434 if (MODULE_GLOBAL(ip6_v6only)) { 2435 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2436 } 2437 } 2438 #endif 2439 inp->sctp_associd_counter = 1; 2440 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2441 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2442 inp->max_cwnd = 0; 2443 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2444 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2445 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2446 inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable); 2447 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2448 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2449 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2450 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2451 inp->idata_supported = 0; 2452 2453 inp->fibnum = so->so_fibnum; 2454 /* init the small hash table we use to track asocid <-> tcb */ 2455 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2456 if (inp->sctp_asocidhash == NULL) { 2457 crfree(inp->ip_inp.inp.inp_cred); 2458 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2459 SCTP_INP_INFO_WUNLOCK(); 2460 return (ENOBUFS); 2461 } 2462 #ifdef IPSEC 2463 error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp); 2464 if (error != 0) { 2465 crfree(inp->ip_inp.inp.inp_cred); 2466 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2467 SCTP_INP_INFO_WUNLOCK(); 2468 return error; 2469 } 2470 #endif /* IPSEC */ 2471 SCTP_INCR_EP_COUNT(); 2472 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2473 SCTP_INP_INFO_WUNLOCK(); 2474 2475 so->so_pcb = (caddr_t)inp; 2476 2477 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2478 /* UDP style socket */ 2479 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2480 SCTP_PCB_FLAGS_UNBOUND); 2481 /* Be sure it is NON-BLOCKING IO for UDP */ 2482 /* SCTP_SET_SO_NBIO(so); */ 2483 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2484 /* TCP style socket */ 2485 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2486 SCTP_PCB_FLAGS_UNBOUND); 2487 /* Be sure we have blocking IO by default */ 2488 SCTP_CLEAR_SO_NBIO(so); 2489 } else { 2490 /* 2491 * unsupported socket type (RAW, etc)- in case we missed it 2492 * in protosw 2493 */ 2494 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2495 so->so_pcb = NULL; 2496 crfree(inp->ip_inp.inp.inp_cred); 2497 #ifdef IPSEC 2498 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2499 #endif 2500 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2501 return (EOPNOTSUPP); 2502 } 2503 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2504 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2505 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2506 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2507 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2508 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2509 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2510 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2511 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2512 } 2513 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2514 &inp->sctp_hashmark); 2515 if (inp->sctp_tcbhash == NULL) { 2516 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2517 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2518 so->so_pcb = NULL; 2519 crfree(inp->ip_inp.inp.inp_cred); 2520 #ifdef IPSEC 2521 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2522 #endif 2523 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2524 return (ENOBUFS); 2525 } 2526 inp->def_vrf_id = vrf_id; 2527 2528 SCTP_INP_INFO_WLOCK(); 2529 SCTP_INP_LOCK_INIT(inp); 2530 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2531 SCTP_INP_READ_INIT(inp); 2532 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2533 /* lock the new ep */ 2534 SCTP_INP_WLOCK(inp); 2535 2536 /* add it to the info area */ 2537 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2538 SCTP_INP_INFO_WUNLOCK(); 2539 2540 TAILQ_INIT(&inp->read_queue); 2541 LIST_INIT(&inp->sctp_addr_list); 2542 2543 LIST_INIT(&inp->sctp_asoc_list); 2544 2545 #ifdef SCTP_TRACK_FREED_ASOCS 2546 /* TEMP CODE */ 2547 LIST_INIT(&inp->sctp_asoc_free_list); 2548 #endif 2549 /* Init the timer structure for signature change */ 2550 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2551 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2552 2553 /* now init the actual endpoint default data */ 2554 m = &inp->sctp_ep; 2555 2556 /* setup the base timeout information */ 2557 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2558 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2559 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2560 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2561 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2562 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2563 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2564 /* all max/min max are in ms */ 2565 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2566 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2567 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2568 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2569 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2570 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2571 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2572 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2573 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2574 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2575 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2576 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2577 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2578 2579 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2580 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2581 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2582 /* number of streams to pre-open on a association */ 2583 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2584 2585 /* Add adaptation cookie */ 2586 m->adaptation_layer_indicator = 0; 2587 m->adaptation_layer_indicator_provided = 0; 2588 2589 /* seed random number generator */ 2590 m->random_counter = 1; 2591 m->store_at = SCTP_SIGNATURE_SIZE; 2592 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2593 sctp_fill_random_store(m); 2594 2595 /* Minimum cookie size */ 2596 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2597 sizeof(struct sctp_state_cookie); 2598 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2599 2600 /* Setup the initial secret */ 2601 (void)SCTP_GETTIME_TIMEVAL(&time); 2602 m->time_of_secret_change = time.tv_sec; 2603 2604 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2605 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2606 } 2607 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2608 2609 /* How long is a cookie good for ? */ 2610 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2611 /* 2612 * Initialize authentication parameters 2613 */ 2614 m->local_hmacs = sctp_default_supported_hmaclist(); 2615 m->local_auth_chunks = sctp_alloc_chunklist(); 2616 if (inp->asconf_supported) { 2617 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2618 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2619 } 2620 m->default_dscp = 0; 2621 #ifdef INET6 2622 m->default_flowlabel = 0; 2623 #endif 2624 m->port = 0; /* encapsulation disabled by default */ 2625 LIST_INIT(&m->shared_keys); 2626 /* add default NULL key as key id 0 */ 2627 null_key = sctp_alloc_sharedkey(); 2628 sctp_insert_sharedkey(&m->shared_keys, null_key); 2629 SCTP_INP_WUNLOCK(inp); 2630 #ifdef SCTP_LOG_CLOSING 2631 sctp_log_closing(inp, NULL, 12); 2632 #endif 2633 return (error); 2634 } 2635 2636 2637 void 2638 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2639 struct sctp_tcb *stcb) 2640 { 2641 struct sctp_nets *net; 2642 uint16_t lport, rport; 2643 struct sctppcbhead *head; 2644 struct sctp_laddr *laddr, *oladdr; 2645 2646 atomic_add_int(&stcb->asoc.refcnt, 1); 2647 SCTP_TCB_UNLOCK(stcb); 2648 SCTP_INP_INFO_WLOCK(); 2649 SCTP_INP_WLOCK(old_inp); 2650 SCTP_INP_WLOCK(new_inp); 2651 SCTP_TCB_LOCK(stcb); 2652 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2653 2654 new_inp->sctp_ep.time_of_secret_change = 2655 old_inp->sctp_ep.time_of_secret_change; 2656 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2657 sizeof(old_inp->sctp_ep.secret_key)); 2658 new_inp->sctp_ep.current_secret_number = 2659 old_inp->sctp_ep.current_secret_number; 2660 new_inp->sctp_ep.last_secret_number = 2661 old_inp->sctp_ep.last_secret_number; 2662 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2663 2664 /* make it so new data pours into the new socket */ 2665 stcb->sctp_socket = new_inp->sctp_socket; 2666 stcb->sctp_ep = new_inp; 2667 2668 /* Copy the port across */ 2669 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2670 rport = stcb->rport; 2671 /* Pull the tcb from the old association */ 2672 LIST_REMOVE(stcb, sctp_tcbhash); 2673 LIST_REMOVE(stcb, sctp_tcblist); 2674 if (stcb->asoc.in_asocid_hash) { 2675 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2676 } 2677 /* Now insert the new_inp into the TCP connected hash */ 2678 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2679 2680 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2681 /* Its safe to access */ 2682 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2683 2684 /* Now move the tcb into the endpoint list */ 2685 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2686 /* 2687 * Question, do we even need to worry about the ep-hash since we 2688 * only have one connection? Probably not :> so lets get rid of it 2689 * and not suck up any kernel memory in that. 2690 */ 2691 if (stcb->asoc.in_asocid_hash) { 2692 struct sctpasochead *lhd; 2693 2694 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2695 new_inp->hashasocidmark)]; 2696 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2697 } 2698 /* Ok. Let's restart timer. */ 2699 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2700 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2701 stcb, net); 2702 } 2703 2704 SCTP_INP_INFO_WUNLOCK(); 2705 if (new_inp->sctp_tcbhash != NULL) { 2706 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2707 new_inp->sctp_tcbhash = NULL; 2708 } 2709 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2710 /* Subset bound, so copy in the laddr list from the old_inp */ 2711 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2712 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2713 if (laddr == NULL) { 2714 /* 2715 * Gak, what can we do? This assoc is really 2716 * HOSED. We probably should send an abort 2717 * here. 2718 */ 2719 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2720 continue; 2721 } 2722 SCTP_INCR_LADDR_COUNT(); 2723 bzero(laddr, sizeof(*laddr)); 2724 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2725 laddr->ifa = oladdr->ifa; 2726 atomic_add_int(&laddr->ifa->refcount, 1); 2727 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2728 sctp_nxt_addr); 2729 new_inp->laddr_count++; 2730 if (oladdr == stcb->asoc.last_used_address) { 2731 stcb->asoc.last_used_address = laddr; 2732 } 2733 } 2734 } 2735 /* 2736 * Now any running timers need to be adjusted since we really don't 2737 * care if they are running or not just blast in the new_inp into 2738 * all of them. 2739 */ 2740 2741 stcb->asoc.dack_timer.ep = (void *)new_inp; 2742 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2743 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2744 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2745 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2746 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2747 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2748 /* now what about the nets? */ 2749 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2750 net->pmtu_timer.ep = (void *)new_inp; 2751 net->hb_timer.ep = (void *)new_inp; 2752 net->rxt_timer.ep = (void *)new_inp; 2753 } 2754 SCTP_INP_WUNLOCK(new_inp); 2755 SCTP_INP_WUNLOCK(old_inp); 2756 } 2757 2758 /* 2759 * insert an laddr entry with the given ifa for the desired list 2760 */ 2761 static int 2762 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2763 { 2764 struct sctp_laddr *laddr; 2765 2766 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2767 if (laddr == NULL) { 2768 /* out of memory? */ 2769 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2770 return (EINVAL); 2771 } 2772 SCTP_INCR_LADDR_COUNT(); 2773 bzero(laddr, sizeof(*laddr)); 2774 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2775 laddr->ifa = ifa; 2776 laddr->action = act; 2777 atomic_add_int(&ifa->refcount, 1); 2778 /* insert it */ 2779 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2780 2781 return (0); 2782 } 2783 2784 /* 2785 * Remove an laddr entry from the local address list (on an assoc) 2786 */ 2787 static void 2788 sctp_remove_laddr(struct sctp_laddr *laddr) 2789 { 2790 2791 /* remove from the list */ 2792 LIST_REMOVE(laddr, sctp_nxt_addr); 2793 sctp_free_ifa(laddr->ifa); 2794 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2795 SCTP_DECR_LADDR_COUNT(); 2796 } 2797 2798 2799 2800 /* sctp_ifap is used to bypass normal local address validation checks */ 2801 int 2802 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2803 struct sctp_ifa *sctp_ifap, struct thread *p) 2804 { 2805 /* bind a ep to a socket address */ 2806 struct sctppcbhead *head; 2807 struct sctp_inpcb *inp, *inp_tmp; 2808 struct inpcb *ip_inp; 2809 int port_reuse_active = 0; 2810 int bindall; 2811 uint16_t lport; 2812 int error; 2813 uint32_t vrf_id; 2814 2815 lport = 0; 2816 bindall = 1; 2817 inp = (struct sctp_inpcb *)so->so_pcb; 2818 ip_inp = (struct inpcb *)so->so_pcb; 2819 #ifdef SCTP_DEBUG 2820 if (addr) { 2821 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2822 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2823 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2824 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2825 } 2826 #endif 2827 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2828 /* already did a bind, subsequent binds NOT allowed ! */ 2829 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2830 return (EINVAL); 2831 } 2832 #ifdef INVARIANTS 2833 if (p == NULL) 2834 panic("null proc/thread"); 2835 #endif 2836 if (addr != NULL) { 2837 switch (addr->sa_family) { 2838 #ifdef INET 2839 case AF_INET: 2840 { 2841 struct sockaddr_in *sin; 2842 2843 /* IPV6_V6ONLY socket? */ 2844 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2845 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2846 return (EINVAL); 2847 } 2848 if (addr->sa_len != sizeof(*sin)) { 2849 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2850 return (EINVAL); 2851 } 2852 sin = (struct sockaddr_in *)addr; 2853 lport = sin->sin_port; 2854 /* 2855 * For LOOPBACK the prison_local_ip4() call 2856 * will transmute the ip address to the 2857 * proper value. 2858 */ 2859 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2860 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2861 return (error); 2862 } 2863 if (sin->sin_addr.s_addr != INADDR_ANY) { 2864 bindall = 0; 2865 } 2866 break; 2867 } 2868 #endif 2869 #ifdef INET6 2870 case AF_INET6: 2871 { 2872 /* Only for pure IPv6 Address. (No IPv4 2873 * Mapped!) */ 2874 struct sockaddr_in6 *sin6; 2875 2876 sin6 = (struct sockaddr_in6 *)addr; 2877 2878 if (addr->sa_len != sizeof(*sin6)) { 2879 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2880 return (EINVAL); 2881 } 2882 lport = sin6->sin6_port; 2883 /* 2884 * For LOOPBACK the prison_local_ip6() call 2885 * will transmute the ipv6 address to the 2886 * proper value. 2887 */ 2888 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2889 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2890 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2891 return (error); 2892 } 2893 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2894 bindall = 0; 2895 /* KAME hack: embed scopeid */ 2896 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2898 return (EINVAL); 2899 } 2900 } 2901 /* this must be cleared for ifa_ifwithaddr() */ 2902 sin6->sin6_scope_id = 0; 2903 break; 2904 } 2905 #endif 2906 default: 2907 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2908 return (EAFNOSUPPORT); 2909 } 2910 } 2911 SCTP_INP_INFO_WLOCK(); 2912 SCTP_INP_WLOCK(inp); 2913 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2914 vrf_id = inp->def_vrf_id; 2915 2916 /* increase our count due to the unlock we do */ 2917 SCTP_INP_INCR_REF(inp); 2918 if (lport) { 2919 /* 2920 * Did the caller specify a port? if so we must see if an ep 2921 * already has this one bound. 2922 */ 2923 /* got to be root to get at low ports */ 2924 if (ntohs(lport) < IPPORT_RESERVED) { 2925 if (p && (error = 2926 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2927 )) { 2928 SCTP_INP_DECR_REF(inp); 2929 SCTP_INP_WUNLOCK(inp); 2930 SCTP_INP_INFO_WUNLOCK(); 2931 return (error); 2932 } 2933 } 2934 SCTP_INP_WUNLOCK(inp); 2935 if (bindall) { 2936 vrf_id = inp->def_vrf_id; 2937 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2938 if (inp_tmp != NULL) { 2939 /* 2940 * lock guy returned and lower count note 2941 * that we are not bound so inp_tmp should 2942 * NEVER be inp. And it is this inp 2943 * (inp_tmp) that gets the reference bump, 2944 * so we must lower it. 2945 */ 2946 SCTP_INP_DECR_REF(inp_tmp); 2947 /* unlock info */ 2948 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2949 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2950 /* Ok, must be one-2-one and 2951 * allowing port re-use */ 2952 port_reuse_active = 1; 2953 goto continue_anyway; 2954 } 2955 SCTP_INP_DECR_REF(inp); 2956 SCTP_INP_INFO_WUNLOCK(); 2957 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2958 return (EADDRINUSE); 2959 } 2960 } else { 2961 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2962 if (inp_tmp != NULL) { 2963 /* 2964 * lock guy returned and lower count note 2965 * that we are not bound so inp_tmp should 2966 * NEVER be inp. And it is this inp 2967 * (inp_tmp) that gets the reference bump, 2968 * so we must lower it. 2969 */ 2970 SCTP_INP_DECR_REF(inp_tmp); 2971 /* unlock info */ 2972 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2973 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2974 /* Ok, must be one-2-one and 2975 * allowing port re-use */ 2976 port_reuse_active = 1; 2977 goto continue_anyway; 2978 } 2979 SCTP_INP_DECR_REF(inp); 2980 SCTP_INP_INFO_WUNLOCK(); 2981 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2982 return (EADDRINUSE); 2983 } 2984 } 2985 continue_anyway: 2986 SCTP_INP_WLOCK(inp); 2987 if (bindall) { 2988 /* verify that no lport is not used by a singleton */ 2989 if ((port_reuse_active == 0) && 2990 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2991 /* Sorry someone already has this one bound */ 2992 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2993 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2994 port_reuse_active = 1; 2995 } else { 2996 SCTP_INP_DECR_REF(inp); 2997 SCTP_INP_WUNLOCK(inp); 2998 SCTP_INP_INFO_WUNLOCK(); 2999 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3000 return (EADDRINUSE); 3001 } 3002 } 3003 } 3004 } else { 3005 uint16_t first, last, candidate; 3006 uint16_t count; 3007 int done; 3008 3009 if (ip_inp->inp_flags & INP_HIGHPORT) { 3010 first = MODULE_GLOBAL(ipport_hifirstauto); 3011 last = MODULE_GLOBAL(ipport_hilastauto); 3012 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3013 if (p && (error = 3014 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3015 )) { 3016 SCTP_INP_DECR_REF(inp); 3017 SCTP_INP_WUNLOCK(inp); 3018 SCTP_INP_INFO_WUNLOCK(); 3019 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3020 return (error); 3021 } 3022 first = MODULE_GLOBAL(ipport_lowfirstauto); 3023 last = MODULE_GLOBAL(ipport_lowlastauto); 3024 } else { 3025 first = MODULE_GLOBAL(ipport_firstauto); 3026 last = MODULE_GLOBAL(ipport_lastauto); 3027 } 3028 if (first > last) { 3029 uint16_t temp; 3030 3031 temp = first; 3032 first = last; 3033 last = temp; 3034 } 3035 count = last - first + 1; /* number of candidates */ 3036 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3037 3038 done = 0; 3039 while (!done) { 3040 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3041 done = 1; 3042 } 3043 if (!done) { 3044 if (--count == 0) { 3045 SCTP_INP_DECR_REF(inp); 3046 SCTP_INP_WUNLOCK(inp); 3047 SCTP_INP_INFO_WUNLOCK(); 3048 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3049 return (EADDRINUSE); 3050 } 3051 if (candidate == last) 3052 candidate = first; 3053 else 3054 candidate = candidate + 1; 3055 } 3056 } 3057 lport = htons(candidate); 3058 } 3059 SCTP_INP_DECR_REF(inp); 3060 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3061 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3062 /* 3063 * this really should not happen. The guy did a non-blocking 3064 * bind and then did a close at the same time. 3065 */ 3066 SCTP_INP_WUNLOCK(inp); 3067 SCTP_INP_INFO_WUNLOCK(); 3068 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3069 return (EINVAL); 3070 } 3071 /* ok we look clear to give out this port, so lets setup the binding */ 3072 if (bindall) { 3073 /* binding to all addresses, so just set in the proper flags */ 3074 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3075 /* set the automatic addr changes from kernel flag */ 3076 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3077 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3078 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3079 } else { 3080 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3081 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3082 } 3083 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3084 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3085 } else { 3086 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3087 } 3088 /* 3089 * set the automatic mobility_base from kernel flag (by 3090 * micchie) 3091 */ 3092 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3093 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3094 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3095 } else { 3096 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3097 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3098 } 3099 /* 3100 * set the automatic mobility_fasthandoff from kernel flag 3101 * (by micchie) 3102 */ 3103 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3106 } else { 3107 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3109 } 3110 } else { 3111 /* 3112 * bind specific, make sure flags is off and add a new 3113 * address structure to the sctp_addr_list inside the ep 3114 * structure. 3115 * 3116 * We will need to allocate one and insert it at the head. 3117 * The socketopt call can just insert new addresses in there 3118 * as well. It will also have to do the embed scope kame 3119 * hack too (before adding). 3120 */ 3121 struct sctp_ifa *ifa; 3122 union sctp_sockstore store; 3123 3124 memset(&store, 0, sizeof(store)); 3125 switch (addr->sa_family) { 3126 #ifdef INET 3127 case AF_INET: 3128 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3129 store.sin.sin_port = 0; 3130 break; 3131 #endif 3132 #ifdef INET6 3133 case AF_INET6: 3134 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3135 store.sin6.sin6_port = 0; 3136 break; 3137 #endif 3138 default: 3139 break; 3140 } 3141 /* 3142 * first find the interface with the bound address need to 3143 * zero out the port to find the address! yuck! can't do 3144 * this earlier since need port for sctp_pcb_findep() 3145 */ 3146 if (sctp_ifap != NULL) { 3147 ifa = sctp_ifap; 3148 } else { 3149 /* 3150 * Note for BSD we hit here always other O/S's will 3151 * pass things in via the sctp_ifap argument 3152 * (Panda). 3153 */ 3154 ifa = sctp_find_ifa_by_addr(&store.sa, 3155 vrf_id, SCTP_ADDR_NOT_LOCKED); 3156 } 3157 if (ifa == NULL) { 3158 /* Can't find an interface with that address */ 3159 SCTP_INP_WUNLOCK(inp); 3160 SCTP_INP_INFO_WUNLOCK(); 3161 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3162 return (EADDRNOTAVAIL); 3163 } 3164 #ifdef INET6 3165 if (addr->sa_family == AF_INET6) { 3166 /* GAK, more FIXME IFA lock? */ 3167 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3168 /* Can't bind a non-existent addr. */ 3169 SCTP_INP_WUNLOCK(inp); 3170 SCTP_INP_INFO_WUNLOCK(); 3171 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3172 return (EINVAL); 3173 } 3174 } 3175 #endif 3176 /* we're not bound all */ 3177 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3178 /* allow bindx() to send ASCONF's for binding changes */ 3179 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3180 /* clear automatic addr changes from kernel flag */ 3181 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3182 3183 /* add this address to the endpoint list */ 3184 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3185 if (error != 0) { 3186 SCTP_INP_WUNLOCK(inp); 3187 SCTP_INP_INFO_WUNLOCK(); 3188 return (error); 3189 } 3190 inp->laddr_count++; 3191 } 3192 /* find the bucket */ 3193 if (port_reuse_active) { 3194 /* Put it into tcp 1-2-1 hash */ 3195 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3196 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3197 } else { 3198 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3199 } 3200 /* put it in the bucket */ 3201 LIST_INSERT_HEAD(head, inp, sctp_hash); 3202 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3203 (void *)head, ntohs(lport), port_reuse_active); 3204 /* set in the port */ 3205 inp->sctp_lport = lport; 3206 3207 /* turn off just the unbound flag */ 3208 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3209 SCTP_INP_WUNLOCK(inp); 3210 SCTP_INP_INFO_WUNLOCK(); 3211 return (0); 3212 } 3213 3214 3215 static void 3216 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3217 { 3218 struct sctp_iterator *it, *nit; 3219 3220 /* 3221 * We enter with the only the ITERATOR_LOCK in place and a write 3222 * lock on the inp_info stuff. 3223 */ 3224 it = sctp_it_ctl.cur_it; 3225 if (it && (it->vn != curvnet)) { 3226 /* Its not looking at our VNET */ 3227 return; 3228 } 3229 if (it && (it->inp == inp)) { 3230 /* 3231 * This is tricky and we hold the iterator lock, but when it 3232 * returns and gets the lock (when we release it) the 3233 * iterator will try to operate on inp. We need to stop that 3234 * from happening. But of course the iterator has a 3235 * reference on the stcb and inp. We can mark it and it will 3236 * stop. 3237 * 3238 * If its a single iterator situation, we set the end 3239 * iterator flag. Otherwise we set the iterator to go to the 3240 * next inp. 3241 * 3242 */ 3243 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3244 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3245 } else { 3246 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3247 } 3248 } 3249 /* 3250 * Now go through and remove any single reference to our inp that 3251 * may be still pending on the list 3252 */ 3253 SCTP_IPI_ITERATOR_WQ_LOCK(); 3254 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3255 if (it->vn != curvnet) { 3256 continue; 3257 } 3258 if (it->inp == inp) { 3259 /* This one points to me is it inp specific? */ 3260 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3261 /* Remove and free this one */ 3262 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3263 it, sctp_nxt_itr); 3264 if (it->function_atend != NULL) { 3265 (*it->function_atend) (it->pointer, it->val); 3266 } 3267 SCTP_FREE(it, SCTP_M_ITER); 3268 } else { 3269 it->inp = LIST_NEXT(it->inp, sctp_list); 3270 if (it->inp) { 3271 SCTP_INP_INCR_REF(it->inp); 3272 } 3273 } 3274 /* When its put in the refcnt is incremented so decr 3275 * it */ 3276 SCTP_INP_DECR_REF(inp); 3277 } 3278 } 3279 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3280 } 3281 3282 /* release sctp_inpcb unbind the port */ 3283 void 3284 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3285 { 3286 /* 3287 * Here we free a endpoint. We must find it (if it is in the Hash 3288 * table) and remove it from there. Then we must also find it in the 3289 * overall list and remove it from there. After all removals are 3290 * complete then any timer has to be stopped. Then start the actual 3291 * freeing. a) Any local lists. b) Any associations. c) The hash of 3292 * all associations. d) finally the ep itself. 3293 */ 3294 struct sctp_tcb *asoc, *nasoc; 3295 struct sctp_laddr *laddr, *nladdr; 3296 struct inpcb *ip_pcb; 3297 struct socket *so; 3298 int being_refed = 0; 3299 struct sctp_queued_to_read *sq, *nsq; 3300 int cnt; 3301 sctp_sharedkey_t *shared_key, *nshared_key; 3302 3303 3304 #ifdef SCTP_LOG_CLOSING 3305 sctp_log_closing(inp, NULL, 0); 3306 #endif 3307 SCTP_ITERATOR_LOCK(); 3308 /* mark any iterators on the list or being processed */ 3309 sctp_iterator_inp_being_freed(inp); 3310 SCTP_ITERATOR_UNLOCK(); 3311 so = inp->sctp_socket; 3312 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3313 /* been here before.. eeks.. get out of here */ 3314 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3315 #ifdef SCTP_LOG_CLOSING 3316 sctp_log_closing(inp, NULL, 1); 3317 #endif 3318 return; 3319 } 3320 SCTP_ASOC_CREATE_LOCK(inp); 3321 SCTP_INP_INFO_WLOCK(); 3322 3323 SCTP_INP_WLOCK(inp); 3324 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3325 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3326 /* socket is gone, so no more wakeups allowed */ 3327 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3328 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3329 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3330 3331 } 3332 /* First time through we have the socket lock, after that no more. */ 3333 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3334 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3335 3336 if (inp->control) { 3337 sctp_m_freem(inp->control); 3338 inp->control = NULL; 3339 } 3340 if (inp->pkt) { 3341 sctp_m_freem(inp->pkt); 3342 inp->pkt = NULL; 3343 } 3344 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3345 * here but I will be nice :> (i.e. 3346 * ip_pcb = ep;) */ 3347 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3348 int cnt_in_sd; 3349 3350 cnt_in_sd = 0; 3351 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3352 SCTP_TCB_LOCK(asoc); 3353 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3354 /* Skip guys being freed */ 3355 cnt_in_sd++; 3356 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3357 /* 3358 * Special case - we did not start a 3359 * kill timer on the asoc due to it 3360 * was not closed. So go ahead and 3361 * start it now. 3362 */ 3363 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3364 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3365 } 3366 SCTP_TCB_UNLOCK(asoc); 3367 continue; 3368 } 3369 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3370 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3371 (asoc->asoc.total_output_queue_size == 0)) { 3372 /* 3373 * If we have data in queue, we don't want 3374 * to just free since the app may have done, 3375 * send()/close or connect/send/close. And 3376 * it wants the data to get across first. 3377 */ 3378 /* Just abandon things in the front states */ 3379 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3380 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3381 cnt_in_sd++; 3382 } 3383 continue; 3384 } 3385 /* Disconnect the socket please */ 3386 asoc->sctp_socket = NULL; 3387 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3388 if ((asoc->asoc.size_on_reasm_queue > 0) || 3389 (asoc->asoc.control_pdapi) || 3390 (asoc->asoc.size_on_all_streams > 0) || 3391 (so && (so->so_rcv.sb_cc > 0))) { 3392 /* Left with Data unread */ 3393 struct mbuf *op_err; 3394 3395 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3396 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3397 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3398 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3399 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3400 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3401 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3402 } 3403 if (sctp_free_assoc(inp, asoc, 3404 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3405 cnt_in_sd++; 3406 } 3407 continue; 3408 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3409 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3410 (asoc->asoc.stream_queue_cnt == 0)) { 3411 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3412 goto abort_anyway; 3413 } 3414 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3415 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3416 struct sctp_nets *netp; 3417 3418 /* 3419 * there is nothing queued to send, 3420 * so I send shutdown 3421 */ 3422 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3423 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3424 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3425 } 3426 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3427 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3428 sctp_stop_timers_for_shutdown(asoc); 3429 if (asoc->asoc.alternate) { 3430 netp = asoc->asoc.alternate; 3431 } else { 3432 netp = asoc->asoc.primary_destination; 3433 } 3434 sctp_send_shutdown(asoc, netp); 3435 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3436 netp); 3437 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3438 asoc->asoc.primary_destination); 3439 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3440 } 3441 } else { 3442 /* mark into shutdown pending */ 3443 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3444 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3445 asoc->asoc.primary_destination); 3446 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3447 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3448 } 3449 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3450 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3451 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3452 struct mbuf *op_err; 3453 3454 abort_anyway: 3455 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3456 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3457 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3458 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3459 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3460 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3461 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3462 } 3463 if (sctp_free_assoc(inp, asoc, 3464 SCTP_PCBFREE_NOFORCE, 3465 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3466 cnt_in_sd++; 3467 } 3468 continue; 3469 } else { 3470 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3471 } 3472 } 3473 cnt_in_sd++; 3474 SCTP_TCB_UNLOCK(asoc); 3475 } 3476 /* now is there some left in our SHUTDOWN state? */ 3477 if (cnt_in_sd) { 3478 #ifdef SCTP_LOG_CLOSING 3479 sctp_log_closing(inp, NULL, 2); 3480 #endif 3481 inp->sctp_socket = NULL; 3482 SCTP_INP_WUNLOCK(inp); 3483 SCTP_ASOC_CREATE_UNLOCK(inp); 3484 SCTP_INP_INFO_WUNLOCK(); 3485 return; 3486 } 3487 } 3488 inp->sctp_socket = NULL; 3489 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3490 SCTP_PCB_FLAGS_UNBOUND) { 3491 /* 3492 * ok, this guy has been bound. It's port is somewhere in 3493 * the SCTP_BASE_INFO(hash table). Remove it! 3494 */ 3495 LIST_REMOVE(inp, sctp_hash); 3496 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3497 } 3498 /* 3499 * If there is a timer running to kill us, forget it, since it may 3500 * have a contest on the INP lock.. which would cause us to die ... 3501 */ 3502 cnt = 0; 3503 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3504 SCTP_TCB_LOCK(asoc); 3505 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3506 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3507 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3508 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3509 } 3510 cnt++; 3511 SCTP_TCB_UNLOCK(asoc); 3512 continue; 3513 } 3514 /* Free associations that are NOT killing us */ 3515 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3516 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3517 struct mbuf *op_err; 3518 3519 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3520 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3521 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3522 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3523 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3524 cnt++; 3525 SCTP_TCB_UNLOCK(asoc); 3526 continue; 3527 } 3528 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3529 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3530 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3531 } 3532 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3533 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3534 cnt++; 3535 } 3536 } 3537 if (cnt) { 3538 /* Ok we have someone out there that will kill us */ 3539 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3540 #ifdef SCTP_LOG_CLOSING 3541 sctp_log_closing(inp, NULL, 3); 3542 #endif 3543 SCTP_INP_WUNLOCK(inp); 3544 SCTP_ASOC_CREATE_UNLOCK(inp); 3545 SCTP_INP_INFO_WUNLOCK(); 3546 return; 3547 } 3548 if (SCTP_INP_LOCK_CONTENDED(inp)) 3549 being_refed++; 3550 if (SCTP_INP_READ_CONTENDED(inp)) 3551 being_refed++; 3552 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3553 being_refed++; 3554 3555 if ((inp->refcount) || 3556 (being_refed) || 3557 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3558 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3559 #ifdef SCTP_LOG_CLOSING 3560 sctp_log_closing(inp, NULL, 4); 3561 #endif 3562 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3563 SCTP_INP_WUNLOCK(inp); 3564 SCTP_ASOC_CREATE_UNLOCK(inp); 3565 SCTP_INP_INFO_WUNLOCK(); 3566 return; 3567 } 3568 inp->sctp_ep.signature_change.type = 0; 3569 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3570 /* 3571 * Remove it from the list .. last thing we need a lock for. 3572 */ 3573 LIST_REMOVE(inp, sctp_list); 3574 SCTP_INP_WUNLOCK(inp); 3575 SCTP_ASOC_CREATE_UNLOCK(inp); 3576 SCTP_INP_INFO_WUNLOCK(); 3577 /* 3578 * Now we release all locks. Since this INP cannot be found anymore 3579 * except possibly by the kill timer that might be running. We call 3580 * the drain function here. It should hit the case were it sees the 3581 * ACTIVE flag cleared and exit out freeing us to proceed and 3582 * destroy everything. 3583 */ 3584 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3585 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3586 } else { 3587 /* Probably un-needed */ 3588 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3589 } 3590 3591 #ifdef SCTP_LOG_CLOSING 3592 sctp_log_closing(inp, NULL, 5); 3593 #endif 3594 3595 3596 if ((inp->sctp_asocidhash) != NULL) { 3597 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3598 inp->sctp_asocidhash = NULL; 3599 } 3600 /* sa_ignore FREED_MEMORY */ 3601 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3602 /* Its only abandoned if it had data left */ 3603 if (sq->length) 3604 SCTP_STAT_INCR(sctps_left_abandon); 3605 3606 TAILQ_REMOVE(&inp->read_queue, sq, next); 3607 sctp_free_remote_addr(sq->whoFrom); 3608 if (so) 3609 so->so_rcv.sb_cc -= sq->length; 3610 if (sq->data) { 3611 sctp_m_freem(sq->data); 3612 sq->data = NULL; 3613 } 3614 /* 3615 * no need to free the net count, since at this point all 3616 * assoc's are gone. 3617 */ 3618 sctp_free_a_readq(NULL, sq); 3619 } 3620 /* Now the sctp_pcb things */ 3621 /* 3622 * free each asoc if it is not already closed/free. we can't use the 3623 * macro here since le_next will get freed as part of the 3624 * sctp_free_assoc() call. 3625 */ 3626 #ifdef IPSEC 3627 ipsec_delete_pcbpolicy(ip_pcb); 3628 #endif 3629 if (ip_pcb->inp_options) { 3630 (void)sctp_m_free(ip_pcb->inp_options); 3631 ip_pcb->inp_options = 0; 3632 } 3633 #ifdef INET6 3634 if (ip_pcb->inp_vflag & INP_IPV6) { 3635 struct in6pcb *in6p; 3636 3637 in6p = (struct in6pcb *)inp; 3638 ip6_freepcbopts(in6p->in6p_outputopts); 3639 } 3640 #endif /* INET6 */ 3641 ip_pcb->inp_vflag = 0; 3642 /* free up authentication fields */ 3643 if (inp->sctp_ep.local_auth_chunks != NULL) 3644 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3645 if (inp->sctp_ep.local_hmacs != NULL) 3646 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3647 3648 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3649 LIST_REMOVE(shared_key, next); 3650 sctp_free_sharedkey(shared_key); 3651 /* sa_ignore FREED_MEMORY */ 3652 } 3653 3654 /* 3655 * if we have an address list the following will free the list of 3656 * ifaddr's that are set into this ep. Again macro limitations here, 3657 * since the LIST_FOREACH could be a bad idea. 3658 */ 3659 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3660 sctp_remove_laddr(laddr); 3661 } 3662 3663 #ifdef SCTP_TRACK_FREED_ASOCS 3664 /* TEMP CODE */ 3665 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3666 LIST_REMOVE(asoc, sctp_tcblist); 3667 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3668 SCTP_DECR_ASOC_COUNT(); 3669 } 3670 /* *** END TEMP CODE *** */ 3671 #endif 3672 /* Now lets see about freeing the EP hash table. */ 3673 if (inp->sctp_tcbhash != NULL) { 3674 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3675 inp->sctp_tcbhash = NULL; 3676 } 3677 /* Now we must put the ep memory back into the zone pool */ 3678 crfree(inp->ip_inp.inp.inp_cred); 3679 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3680 SCTP_INP_LOCK_DESTROY(inp); 3681 SCTP_INP_READ_DESTROY(inp); 3682 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3683 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3684 SCTP_DECR_EP_COUNT(); 3685 } 3686 3687 3688 struct sctp_nets * 3689 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3690 { 3691 struct sctp_nets *net; 3692 3693 /* locate the address */ 3694 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3695 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3696 return (net); 3697 } 3698 return (NULL); 3699 } 3700 3701 3702 int 3703 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3704 { 3705 struct sctp_ifa *sctp_ifa; 3706 3707 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3708 if (sctp_ifa) { 3709 return (1); 3710 } else { 3711 return (0); 3712 } 3713 } 3714 3715 /* 3716 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3717 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3718 * stats of stuff. 3719 */ 3720 int 3721 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3722 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3723 { 3724 /* 3725 * The following is redundant to the same lines in the 3726 * sctp_aloc_assoc() but is needed since others call the add address 3727 * function 3728 */ 3729 struct sctp_nets *net, *netfirst; 3730 int addr_inscope; 3731 3732 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3733 from); 3734 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3735 3736 netfirst = sctp_findnet(stcb, newaddr); 3737 if (netfirst) { 3738 /* 3739 * Lie and return ok, we don't want to make the association 3740 * go away for this behavior. It will happen in the TCP 3741 * model in a connected socket. It does not reach the hash 3742 * table until after the association is built so it can't be 3743 * found. Mark as reachable, since the initial creation will 3744 * have been cleared and the NOT_IN_ASSOC flag will have 3745 * been added... and we don't want to end up removing it 3746 * back out. 3747 */ 3748 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3749 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3750 SCTP_ADDR_UNCONFIRMED); 3751 } else { 3752 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3753 } 3754 3755 return (0); 3756 } 3757 addr_inscope = 1; 3758 switch (newaddr->sa_family) { 3759 #ifdef INET 3760 case AF_INET: 3761 { 3762 struct sockaddr_in *sin; 3763 3764 sin = (struct sockaddr_in *)newaddr; 3765 if (sin->sin_addr.s_addr == 0) { 3766 /* Invalid address */ 3767 return (-1); 3768 } 3769 /* zero out the bzero area */ 3770 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3771 3772 /* assure len is set */ 3773 sin->sin_len = sizeof(struct sockaddr_in); 3774 if (set_scope) { 3775 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3776 stcb->asoc.scope.ipv4_local_scope = 1; 3777 } 3778 } else { 3779 /* Validate the address is in scope */ 3780 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3781 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3782 addr_inscope = 0; 3783 } 3784 } 3785 break; 3786 } 3787 #endif 3788 #ifdef INET6 3789 case AF_INET6: 3790 { 3791 struct sockaddr_in6 *sin6; 3792 3793 sin6 = (struct sockaddr_in6 *)newaddr; 3794 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3795 /* Invalid address */ 3796 return (-1); 3797 } 3798 /* assure len is set */ 3799 sin6->sin6_len = sizeof(struct sockaddr_in6); 3800 if (set_scope) { 3801 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3802 stcb->asoc.scope.loopback_scope = 1; 3803 stcb->asoc.scope.local_scope = 0; 3804 stcb->asoc.scope.ipv4_local_scope = 1; 3805 stcb->asoc.scope.site_scope = 1; 3806 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3807 /* 3808 * If the new destination is a 3809 * LINK_LOCAL we must have common 3810 * site scope. Don't set the local 3811 * scope since we may not share all 3812 * links, only loopback can do this. 3813 * Links on the local network would 3814 * also be on our private network 3815 * for v4 too. 3816 */ 3817 stcb->asoc.scope.ipv4_local_scope = 1; 3818 stcb->asoc.scope.site_scope = 1; 3819 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3820 /* 3821 * If the new destination is 3822 * SITE_LOCAL then we must have site 3823 * scope in common. 3824 */ 3825 stcb->asoc.scope.site_scope = 1; 3826 } 3827 } else { 3828 /* Validate the address is in scope */ 3829 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3830 (stcb->asoc.scope.loopback_scope == 0)) { 3831 addr_inscope = 0; 3832 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3833 (stcb->asoc.scope.local_scope == 0)) { 3834 addr_inscope = 0; 3835 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3836 (stcb->asoc.scope.site_scope == 0)) { 3837 addr_inscope = 0; 3838 } 3839 } 3840 break; 3841 } 3842 #endif 3843 default: 3844 /* not supported family type */ 3845 return (-1); 3846 } 3847 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3848 if (net == NULL) { 3849 return (-1); 3850 } 3851 SCTP_INCR_RADDR_COUNT(); 3852 bzero(net, sizeof(struct sctp_nets)); 3853 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3854 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3855 switch (newaddr->sa_family) { 3856 #ifdef INET 3857 case AF_INET: 3858 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3859 break; 3860 #endif 3861 #ifdef INET6 3862 case AF_INET6: 3863 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3864 break; 3865 #endif 3866 default: 3867 break; 3868 } 3869 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3870 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3871 stcb->asoc.scope.loopback_scope = 1; 3872 stcb->asoc.scope.ipv4_local_scope = 1; 3873 stcb->asoc.scope.local_scope = 0; 3874 stcb->asoc.scope.site_scope = 1; 3875 addr_inscope = 1; 3876 } 3877 net->failure_threshold = stcb->asoc.def_net_failure; 3878 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3879 if (addr_inscope == 0) { 3880 net->dest_state = (SCTP_ADDR_REACHABLE | 3881 SCTP_ADDR_OUT_OF_SCOPE); 3882 } else { 3883 if (from == SCTP_ADDR_IS_CONFIRMED) 3884 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3885 net->dest_state = SCTP_ADDR_REACHABLE; 3886 else 3887 net->dest_state = SCTP_ADDR_REACHABLE | 3888 SCTP_ADDR_UNCONFIRMED; 3889 } 3890 /* 3891 * We set this to 0, the timer code knows that this means its an 3892 * initial value 3893 */ 3894 net->rto_needed = 1; 3895 net->RTO = 0; 3896 net->RTO_measured = 0; 3897 stcb->asoc.numnets++; 3898 net->ref_count = 1; 3899 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3900 net->port = port; 3901 net->dscp = stcb->asoc.default_dscp; 3902 #ifdef INET6 3903 net->flowlabel = stcb->asoc.default_flowlabel; 3904 #endif 3905 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3906 net->dest_state |= SCTP_ADDR_NOHB; 3907 } else { 3908 net->dest_state &= ~SCTP_ADDR_NOHB; 3909 } 3910 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3911 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3912 } else { 3913 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3914 } 3915 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3916 /* Init the timer structure */ 3917 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3918 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3919 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3920 3921 /* Now generate a route for this guy */ 3922 #ifdef INET6 3923 /* KAME hack: embed scopeid */ 3924 if (newaddr->sa_family == AF_INET6) { 3925 struct sockaddr_in6 *sin6; 3926 3927 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3928 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3929 sin6->sin6_scope_id = 0; 3930 } 3931 #endif 3932 SCTP_RTALLOC((sctp_route_t *) & net->ro, 3933 stcb->asoc.vrf_id, 3934 stcb->sctp_ep->fibnum); 3935 3936 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3937 /* Get source address */ 3938 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3939 stcb, 3940 (sctp_route_t *) & net->ro, 3941 net, 3942 0, 3943 stcb->asoc.vrf_id); 3944 if (net->ro._s_addr != NULL) { 3945 net->src_addr_selected = 1; 3946 /* Now get the interface MTU */ 3947 if (net->ro._s_addr->ifn_p != NULL) { 3948 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3949 } 3950 } else { 3951 net->src_addr_selected = 0; 3952 } 3953 if (net->mtu > 0) { 3954 uint32_t rmtu; 3955 3956 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3957 if (rmtu == 0) { 3958 /* Start things off to match mtu of 3959 * interface please. */ 3960 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3961 net->ro.ro_rt, net->mtu); 3962 } else { 3963 /* 3964 * we take the route mtu over the interface, 3965 * since the route may be leading out the 3966 * loopback, or a different interface. 3967 */ 3968 net->mtu = rmtu; 3969 } 3970 } 3971 } else { 3972 net->src_addr_selected = 0; 3973 } 3974 if (net->mtu == 0) { 3975 switch (newaddr->sa_family) { 3976 #ifdef INET 3977 case AF_INET: 3978 net->mtu = SCTP_DEFAULT_MTU; 3979 break; 3980 #endif 3981 #ifdef INET6 3982 case AF_INET6: 3983 net->mtu = 1280; 3984 break; 3985 #endif 3986 default: 3987 break; 3988 } 3989 } 3990 #if defined(INET) || defined(INET6) 3991 if (net->port) { 3992 net->mtu -= (uint32_t) sizeof(struct udphdr); 3993 } 3994 #endif 3995 if (from == SCTP_ALLOC_ASOC) { 3996 stcb->asoc.smallest_mtu = net->mtu; 3997 } 3998 if (stcb->asoc.smallest_mtu > net->mtu) { 3999 sctp_pathmtu_adjustment(stcb, net->mtu); 4000 } 4001 #ifdef INET6 4002 if (newaddr->sa_family == AF_INET6) { 4003 struct sockaddr_in6 *sin6; 4004 4005 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4006 (void)sa6_recoverscope(sin6); 4007 } 4008 #endif 4009 4010 /* JRS - Use the congestion control given in the CC module */ 4011 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4012 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4013 4014 /* 4015 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4016 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4017 */ 4018 net->find_pseudo_cumack = 1; 4019 net->find_rtx_pseudo_cumack = 1; 4020 /* Choose an initial flowid. */ 4021 net->flowid = stcb->asoc.my_vtag ^ 4022 ntohs(stcb->rport) ^ 4023 ntohs(stcb->sctp_ep->sctp_lport); 4024 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4025 if (netp) { 4026 *netp = net; 4027 } 4028 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4029 if (net->ro.ro_rt == NULL) { 4030 /* Since we have no route put it at the back */ 4031 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4032 } else if (netfirst == NULL) { 4033 /* We are the first one in the pool. */ 4034 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4035 } else if (netfirst->ro.ro_rt == NULL) { 4036 /* 4037 * First one has NO route. Place this one ahead of the first 4038 * one. 4039 */ 4040 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4041 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4042 /* 4043 * This one has a different interface than the one at the 4044 * top of the list. Place it ahead. 4045 */ 4046 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4047 } else { 4048 /* 4049 * Ok we have the same interface as the first one. Move 4050 * forward until we find either a) one with a NULL route... 4051 * insert ahead of that b) one with a different ifp.. insert 4052 * after that. c) end of the list.. insert at the tail. 4053 */ 4054 struct sctp_nets *netlook; 4055 4056 do { 4057 netlook = TAILQ_NEXT(netfirst, sctp_next); 4058 if (netlook == NULL) { 4059 /* End of the list */ 4060 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4061 break; 4062 } else if (netlook->ro.ro_rt == NULL) { 4063 /* next one has NO route */ 4064 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4065 break; 4066 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4067 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4068 net, sctp_next); 4069 break; 4070 } 4071 /* Shift forward */ 4072 netfirst = netlook; 4073 } while (netlook != NULL); 4074 } 4075 4076 /* got to have a primary set */ 4077 if (stcb->asoc.primary_destination == 0) { 4078 stcb->asoc.primary_destination = net; 4079 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4080 (net->ro.ro_rt) && 4081 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4082 /* No route to current primary adopt new primary */ 4083 stcb->asoc.primary_destination = net; 4084 } 4085 /* Validate primary is first */ 4086 net = TAILQ_FIRST(&stcb->asoc.nets); 4087 if ((net != stcb->asoc.primary_destination) && 4088 (stcb->asoc.primary_destination)) { 4089 /* 4090 * first one on the list is NOT the primary sctp_cmpaddr() 4091 * is much more efficient if the primary is the first on the 4092 * list, make it so. 4093 */ 4094 TAILQ_REMOVE(&stcb->asoc.nets, 4095 stcb->asoc.primary_destination, sctp_next); 4096 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4097 stcb->asoc.primary_destination, sctp_next); 4098 } 4099 return (0); 4100 } 4101 4102 4103 static uint32_t 4104 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4105 { 4106 uint32_t id; 4107 struct sctpasochead *head; 4108 struct sctp_tcb *lstcb; 4109 4110 SCTP_INP_WLOCK(inp); 4111 try_again: 4112 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4113 /* TSNH */ 4114 SCTP_INP_WUNLOCK(inp); 4115 return (0); 4116 } 4117 /* 4118 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4119 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4120 */ 4121 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4122 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4123 } 4124 id = inp->sctp_associd_counter; 4125 inp->sctp_associd_counter++; 4126 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4127 if (lstcb) { 4128 goto try_again; 4129 } 4130 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4131 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4132 stcb->asoc.in_asocid_hash = 1; 4133 SCTP_INP_WUNLOCK(inp); 4134 return id; 4135 } 4136 4137 /* 4138 * allocate an association and add it to the endpoint. The caller must be 4139 * careful to add all additional addresses once they are know right away or 4140 * else the assoc will be may experience a blackout scenario. 4141 */ 4142 struct sctp_tcb * 4143 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4144 int *error, uint32_t override_tag, uint32_t vrf_id, 4145 uint16_t o_streams, uint16_t port, 4146 struct thread *p 4147 ) 4148 { 4149 /* note the p argument is only valid in unbound sockets */ 4150 4151 struct sctp_tcb *stcb; 4152 struct sctp_association *asoc; 4153 struct sctpasochead *head; 4154 uint16_t rport; 4155 int err; 4156 4157 /* 4158 * Assumption made here: Caller has done a 4159 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4160 * address does not exist already. 4161 */ 4162 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4163 /* Hit max assoc, sorry no more */ 4164 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4165 *error = ENOBUFS; 4166 return (NULL); 4167 } 4168 if (firstaddr == NULL) { 4169 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4170 *error = EINVAL; 4171 return (NULL); 4172 } 4173 SCTP_INP_RLOCK(inp); 4174 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4175 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4176 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4177 /* 4178 * If its in the TCP pool, its NOT allowed to create an 4179 * association. The parent listener needs to call 4180 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4181 * off, or connected one does this.. its an error. 4182 */ 4183 SCTP_INP_RUNLOCK(inp); 4184 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4185 *error = EINVAL; 4186 return (NULL); 4187 } 4188 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4189 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4190 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4191 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4192 SCTP_INP_RUNLOCK(inp); 4193 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4194 *error = EINVAL; 4195 return (NULL); 4196 } 4197 } 4198 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4199 #ifdef SCTP_DEBUG 4200 if (firstaddr) { 4201 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4202 switch (firstaddr->sa_family) { 4203 #ifdef INET 4204 case AF_INET: 4205 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4206 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4207 break; 4208 #endif 4209 #ifdef INET6 4210 case AF_INET6: 4211 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4212 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4213 break; 4214 #endif 4215 default: 4216 break; 4217 } 4218 } else { 4219 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4220 } 4221 #endif /* SCTP_DEBUG */ 4222 switch (firstaddr->sa_family) { 4223 #ifdef INET 4224 case AF_INET: 4225 { 4226 struct sockaddr_in *sin; 4227 4228 sin = (struct sockaddr_in *)firstaddr; 4229 if ((ntohs(sin->sin_port) == 0) || 4230 (sin->sin_addr.s_addr == INADDR_ANY) || 4231 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4232 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4233 /* Invalid address */ 4234 SCTP_INP_RUNLOCK(inp); 4235 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4236 *error = EINVAL; 4237 return (NULL); 4238 } 4239 rport = sin->sin_port; 4240 break; 4241 } 4242 #endif 4243 #ifdef INET6 4244 case AF_INET6: 4245 { 4246 struct sockaddr_in6 *sin6; 4247 4248 sin6 = (struct sockaddr_in6 *)firstaddr; 4249 if ((ntohs(sin6->sin6_port) == 0) || 4250 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4251 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4252 /* Invalid address */ 4253 SCTP_INP_RUNLOCK(inp); 4254 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4255 *error = EINVAL; 4256 return (NULL); 4257 } 4258 rport = sin6->sin6_port; 4259 break; 4260 } 4261 #endif 4262 default: 4263 /* not supported family type */ 4264 SCTP_INP_RUNLOCK(inp); 4265 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4266 *error = EINVAL; 4267 return (NULL); 4268 } 4269 SCTP_INP_RUNLOCK(inp); 4270 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4271 /* 4272 * If you have not performed a bind, then we need to do the 4273 * ephemeral bind for you. 4274 */ 4275 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4276 (struct sockaddr *)NULL, 4277 (struct sctp_ifa *)NULL, 4278 p 4279 ))) { 4280 /* bind error, probably perm */ 4281 *error = err; 4282 return (NULL); 4283 } 4284 } 4285 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4286 if (stcb == NULL) { 4287 /* out of memory? */ 4288 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4289 *error = ENOMEM; 4290 return (NULL); 4291 } 4292 SCTP_INCR_ASOC_COUNT(); 4293 4294 bzero(stcb, sizeof(*stcb)); 4295 asoc = &stcb->asoc; 4296 4297 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4298 SCTP_TCB_LOCK_INIT(stcb); 4299 SCTP_TCB_SEND_LOCK_INIT(stcb); 4300 stcb->rport = rport; 4301 /* setup back pointer's */ 4302 stcb->sctp_ep = inp; 4303 stcb->sctp_socket = inp->sctp_socket; 4304 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4305 /* failed */ 4306 SCTP_TCB_LOCK_DESTROY(stcb); 4307 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4308 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4309 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4310 SCTP_DECR_ASOC_COUNT(); 4311 *error = err; 4312 return (NULL); 4313 } 4314 /* and the port */ 4315 SCTP_INP_INFO_WLOCK(); 4316 SCTP_INP_WLOCK(inp); 4317 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4318 /* inpcb freed while alloc going on */ 4319 SCTP_TCB_LOCK_DESTROY(stcb); 4320 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4321 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4322 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4323 SCTP_INP_WUNLOCK(inp); 4324 SCTP_INP_INFO_WUNLOCK(); 4325 SCTP_DECR_ASOC_COUNT(); 4326 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4327 *error = EINVAL; 4328 return (NULL); 4329 } 4330 SCTP_TCB_LOCK(stcb); 4331 4332 /* now that my_vtag is set, add it to the hash */ 4333 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4334 /* put it in the bucket in the vtag hash of assoc's for the system */ 4335 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4336 SCTP_INP_INFO_WUNLOCK(); 4337 4338 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4339 /* failure.. memory error? */ 4340 if (asoc->strmout) { 4341 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4342 asoc->strmout = NULL; 4343 } 4344 if (asoc->mapping_array) { 4345 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4346 asoc->mapping_array = NULL; 4347 } 4348 if (asoc->nr_mapping_array) { 4349 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4350 asoc->nr_mapping_array = NULL; 4351 } 4352 SCTP_DECR_ASOC_COUNT(); 4353 SCTP_TCB_UNLOCK(stcb); 4354 SCTP_TCB_LOCK_DESTROY(stcb); 4355 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4356 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4357 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4358 SCTP_INP_WUNLOCK(inp); 4359 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4360 *error = ENOBUFS; 4361 return (NULL); 4362 } 4363 /* Init all the timers */ 4364 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4365 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4366 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4367 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4368 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4369 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4370 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4371 4372 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4373 /* now file the port under the hash as well */ 4374 if (inp->sctp_tcbhash != NULL) { 4375 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4376 inp->sctp_hashmark)]; 4377 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4378 } 4379 SCTP_INP_WUNLOCK(inp); 4380 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4381 return (stcb); 4382 } 4383 4384 4385 void 4386 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4387 { 4388 struct sctp_association *asoc; 4389 4390 asoc = &stcb->asoc; 4391 asoc->numnets--; 4392 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4393 if (net == asoc->primary_destination) { 4394 /* Reset primary */ 4395 struct sctp_nets *lnet; 4396 4397 lnet = TAILQ_FIRST(&asoc->nets); 4398 /* 4399 * Mobility adaptation Ideally, if deleted destination is 4400 * the primary, it becomes a fast retransmission trigger by 4401 * the subsequent SET PRIMARY. (by micchie) 4402 */ 4403 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4404 SCTP_MOBILITY_BASE) || 4405 sctp_is_mobility_feature_on(stcb->sctp_ep, 4406 SCTP_MOBILITY_FASTHANDOFF)) { 4407 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4408 if (asoc->deleted_primary != NULL) { 4409 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4410 goto out; 4411 } 4412 asoc->deleted_primary = net; 4413 atomic_add_int(&net->ref_count, 1); 4414 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4415 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4416 sctp_mobility_feature_on(stcb->sctp_ep, 4417 SCTP_MOBILITY_PRIM_DELETED); 4418 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4419 stcb->sctp_ep, stcb, NULL); 4420 } 4421 out: 4422 /* Try to find a confirmed primary */ 4423 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4424 } 4425 if (net == asoc->last_data_chunk_from) { 4426 /* Reset primary */ 4427 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4428 } 4429 if (net == asoc->last_control_chunk_from) { 4430 /* Clear net */ 4431 asoc->last_control_chunk_from = NULL; 4432 } 4433 if (net == stcb->asoc.alternate) { 4434 sctp_free_remote_addr(stcb->asoc.alternate); 4435 stcb->asoc.alternate = NULL; 4436 } 4437 sctp_free_remote_addr(net); 4438 } 4439 4440 /* 4441 * remove a remote endpoint address from an association, it will fail if the 4442 * address does not exist. 4443 */ 4444 int 4445 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4446 { 4447 /* 4448 * Here we need to remove a remote address. This is quite simple, we 4449 * first find it in the list of address for the association 4450 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4451 * on that item. Note we do not allow it to be removed if there are 4452 * no other addresses. 4453 */ 4454 struct sctp_association *asoc; 4455 struct sctp_nets *net, *nnet; 4456 4457 asoc = &stcb->asoc; 4458 4459 /* locate the address */ 4460 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4461 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4462 continue; 4463 } 4464 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4465 remaddr)) { 4466 /* we found the guy */ 4467 if (asoc->numnets < 2) { 4468 /* Must have at LEAST two remote addresses */ 4469 return (-1); 4470 } else { 4471 sctp_remove_net(stcb, net); 4472 return (0); 4473 } 4474 } 4475 } 4476 /* not found. */ 4477 return (-2); 4478 } 4479 4480 void 4481 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4482 { 4483 struct sctpvtaghead *chain; 4484 struct sctp_tagblock *twait_block; 4485 int found = 0; 4486 int i; 4487 4488 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4489 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4490 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4491 if ((twait_block->vtag_block[i].v_tag == tag) && 4492 (twait_block->vtag_block[i].lport == lport) && 4493 (twait_block->vtag_block[i].rport == rport)) { 4494 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4495 twait_block->vtag_block[i].v_tag = 0; 4496 twait_block->vtag_block[i].lport = 0; 4497 twait_block->vtag_block[i].rport = 0; 4498 found = 1; 4499 break; 4500 } 4501 } 4502 if (found) 4503 break; 4504 } 4505 } 4506 4507 int 4508 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4509 { 4510 struct sctpvtaghead *chain; 4511 struct sctp_tagblock *twait_block; 4512 int found = 0; 4513 int i; 4514 4515 SCTP_INP_INFO_WLOCK(); 4516 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4517 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4518 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4519 if ((twait_block->vtag_block[i].v_tag == tag) && 4520 (twait_block->vtag_block[i].lport == lport) && 4521 (twait_block->vtag_block[i].rport == rport)) { 4522 found = 1; 4523 break; 4524 } 4525 } 4526 if (found) 4527 break; 4528 } 4529 SCTP_INP_INFO_WUNLOCK(); 4530 return (found); 4531 } 4532 4533 4534 void 4535 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4536 { 4537 struct sctpvtaghead *chain; 4538 struct sctp_tagblock *twait_block; 4539 struct timeval now; 4540 int set, i; 4541 4542 if (time == 0) { 4543 /* Its disabled */ 4544 return; 4545 } 4546 (void)SCTP_GETTIME_TIMEVAL(&now); 4547 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4548 set = 0; 4549 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4550 /* Block(s) present, lets find space, and expire on the fly */ 4551 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4552 if ((twait_block->vtag_block[i].v_tag == 0) && 4553 !set) { 4554 twait_block->vtag_block[i].tv_sec_at_expire = 4555 now.tv_sec + time; 4556 twait_block->vtag_block[i].v_tag = tag; 4557 twait_block->vtag_block[i].lport = lport; 4558 twait_block->vtag_block[i].rport = rport; 4559 set = 1; 4560 } else if ((twait_block->vtag_block[i].v_tag) && 4561 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4562 /* Audit expires this guy */ 4563 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4564 twait_block->vtag_block[i].v_tag = 0; 4565 twait_block->vtag_block[i].lport = 0; 4566 twait_block->vtag_block[i].rport = 0; 4567 if (set == 0) { 4568 /* Reuse it for my new tag */ 4569 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4570 twait_block->vtag_block[i].v_tag = tag; 4571 twait_block->vtag_block[i].lport = lport; 4572 twait_block->vtag_block[i].rport = rport; 4573 set = 1; 4574 } 4575 } 4576 } 4577 if (set) { 4578 /* 4579 * We only do up to the block where we can place our 4580 * tag for audits 4581 */ 4582 break; 4583 } 4584 } 4585 /* Need to add a new block to chain */ 4586 if (!set) { 4587 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4588 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4589 if (twait_block == NULL) { 4590 #ifdef INVARIANTS 4591 panic("Can not alloc tagblock"); 4592 #endif 4593 return; 4594 } 4595 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4596 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4597 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4598 twait_block->vtag_block[0].v_tag = tag; 4599 twait_block->vtag_block[0].lport = lport; 4600 twait_block->vtag_block[0].rport = rport; 4601 } 4602 } 4603 4604 void 4605 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4606 { 4607 struct sctp_tmit_chunk *chk, *nchk; 4608 struct sctp_queued_to_read *ctl, *nctl; 4609 4610 TAILQ_FOREACH_SAFE(ctl, rh, next_instrm, nctl) { 4611 TAILQ_REMOVE(rh, ctl, next_instrm); 4612 ctl->on_strm_q = 0; 4613 if (ctl->on_read_q == 0) { 4614 sctp_free_remote_addr(ctl->whoFrom); 4615 if (ctl->data) { 4616 sctp_m_freem(ctl->data); 4617 ctl->data = NULL; 4618 } 4619 } 4620 /* Reassembly free? */ 4621 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 4622 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 4623 if (chk->data) { 4624 sctp_m_freem(chk->data); 4625 chk->data = NULL; 4626 } 4627 if (chk->holds_key_ref) 4628 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4629 sctp_free_remote_addr(chk->whoTo); 4630 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4631 SCTP_DECR_CHK_COUNT(); 4632 /* sa_ignore FREED_MEMORY */ 4633 } 4634 /* 4635 * We don't free the address here since all the net's were 4636 * freed above. 4637 */ 4638 if (ctl->on_read_q == 0) { 4639 sctp_free_a_readq(stcb, ctl); 4640 } 4641 } 4642 } 4643 4644 4645 /*- 4646 * Free the association after un-hashing the remote port. This 4647 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4648 * expect that the input to this function IS a locked TCB. 4649 * It will return 0, if it did NOT destroy the association (instead 4650 * it unlocks it. It will return NON-zero if it either destroyed the 4651 * association OR the association is already destroyed. 4652 */ 4653 int 4654 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4655 { 4656 int i; 4657 struct sctp_association *asoc; 4658 struct sctp_nets *net, *nnet; 4659 struct sctp_laddr *laddr, *naddr; 4660 struct sctp_tmit_chunk *chk, *nchk; 4661 struct sctp_asconf_addr *aparam, *naparam; 4662 struct sctp_asconf_ack *aack, *naack; 4663 struct sctp_stream_reset_list *strrst, *nstrrst; 4664 struct sctp_queued_to_read *sq, *nsq; 4665 struct sctp_stream_queue_pending *sp, *nsp; 4666 sctp_sharedkey_t *shared_key, *nshared_key; 4667 struct socket *so; 4668 4669 /* first, lets purge the entry from the hash table. */ 4670 4671 #ifdef SCTP_LOG_CLOSING 4672 sctp_log_closing(inp, stcb, 6); 4673 #endif 4674 if (stcb->asoc.state == 0) { 4675 #ifdef SCTP_LOG_CLOSING 4676 sctp_log_closing(inp, NULL, 7); 4677 #endif 4678 /* there is no asoc, really TSNH :-0 */ 4679 return (1); 4680 } 4681 if (stcb->asoc.alternate) { 4682 sctp_free_remote_addr(stcb->asoc.alternate); 4683 stcb->asoc.alternate = NULL; 4684 } 4685 /* TEMP CODE */ 4686 if (stcb->freed_from_where == 0) { 4687 /* Only record the first place free happened from */ 4688 stcb->freed_from_where = from_location; 4689 } 4690 /* TEMP CODE */ 4691 4692 asoc = &stcb->asoc; 4693 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4694 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4695 /* nothing around */ 4696 so = NULL; 4697 else 4698 so = inp->sctp_socket; 4699 4700 /* 4701 * We used timer based freeing if a reader or writer is in the way. 4702 * So we first check if we are actually being called from a timer, 4703 * if so we abort early if a reader or writer is still in the way. 4704 */ 4705 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4706 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4707 /* 4708 * is it the timer driving us? if so are the reader/writers 4709 * gone? 4710 */ 4711 if (stcb->asoc.refcnt) { 4712 /* nope, reader or writer in the way */ 4713 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4714 /* no asoc destroyed */ 4715 SCTP_TCB_UNLOCK(stcb); 4716 #ifdef SCTP_LOG_CLOSING 4717 sctp_log_closing(inp, stcb, 8); 4718 #endif 4719 return (0); 4720 } 4721 } 4722 /* now clean up any other timers */ 4723 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4724 asoc->dack_timer.self = NULL; 4725 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4726 /*- 4727 * For stream reset we don't blast this unless 4728 * it is a str-reset timer, it might be the 4729 * free-asoc timer which we DON'T want to 4730 * disturb. 4731 */ 4732 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4733 asoc->strreset_timer.self = NULL; 4734 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4735 asoc->asconf_timer.self = NULL; 4736 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4737 asoc->autoclose_timer.self = NULL; 4738 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4739 asoc->shut_guard_timer.self = NULL; 4740 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4741 asoc->delayed_event_timer.self = NULL; 4742 /* Mobility adaptation */ 4743 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4744 asoc->delete_prim_timer.self = NULL; 4745 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4746 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4747 net->rxt_timer.self = NULL; 4748 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4749 net->pmtu_timer.self = NULL; 4750 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4751 net->hb_timer.self = NULL; 4752 } 4753 /* Now the read queue needs to be cleaned up (only once) */ 4754 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4755 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4756 SCTP_INP_READ_LOCK(inp); 4757 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4758 if (sq->stcb == stcb) { 4759 sq->do_not_ref_stcb = 1; 4760 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4761 /* 4762 * If there is no end, there never will be 4763 * now. 4764 */ 4765 if (sq->end_added == 0) { 4766 /* Held for PD-API clear that. */ 4767 sq->pdapi_aborted = 1; 4768 sq->held_length = 0; 4769 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4770 /* 4771 * Need to add a PD-API 4772 * aborted indication. 4773 * Setting the control_pdapi 4774 * assures that it will be 4775 * added right after this 4776 * msg. 4777 */ 4778 uint32_t strseq; 4779 4780 stcb->asoc.control_pdapi = sq; 4781 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4782 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4783 stcb, 4784 SCTP_PARTIAL_DELIVERY_ABORTED, 4785 (void *)&strseq, 4786 SCTP_SO_LOCKED); 4787 stcb->asoc.control_pdapi = NULL; 4788 } 4789 } 4790 /* Add an end to wake them */ 4791 sq->end_added = 1; 4792 } 4793 } 4794 SCTP_INP_READ_UNLOCK(inp); 4795 if (stcb->block_entry) { 4796 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4797 stcb->block_entry->error = ECONNRESET; 4798 stcb->block_entry = NULL; 4799 } 4800 } 4801 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4802 /* 4803 * Someone holds a reference OR the socket is unaccepted 4804 * yet. 4805 */ 4806 if ((stcb->asoc.refcnt) || 4807 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4808 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4809 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4810 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4811 } 4812 SCTP_TCB_UNLOCK(stcb); 4813 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4814 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4815 /* nothing around */ 4816 so = NULL; 4817 if (so) { 4818 /* Wake any reader/writers */ 4819 sctp_sorwakeup(inp, so); 4820 sctp_sowwakeup(inp, so); 4821 } 4822 #ifdef SCTP_LOG_CLOSING 4823 sctp_log_closing(inp, stcb, 9); 4824 #endif 4825 /* no asoc destroyed */ 4826 return (0); 4827 } 4828 #ifdef SCTP_LOG_CLOSING 4829 sctp_log_closing(inp, stcb, 10); 4830 #endif 4831 /* 4832 * When I reach here, no others want to kill the assoc yet.. and I 4833 * own the lock. Now its possible an abort comes in when I do the 4834 * lock exchange below to grab all the locks to do the final take 4835 * out. to prevent this we increment the count, which will start a 4836 * timer and blow out above thus assuring us that we hold exclusive 4837 * killing of the asoc. Note that after getting back the TCB lock we 4838 * will go ahead and increment the counter back up and stop any 4839 * timer a passing stranger may have started :-S 4840 */ 4841 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4842 atomic_add_int(&stcb->asoc.refcnt, 1); 4843 4844 SCTP_TCB_UNLOCK(stcb); 4845 SCTP_INP_INFO_WLOCK(); 4846 SCTP_INP_WLOCK(inp); 4847 SCTP_TCB_LOCK(stcb); 4848 } 4849 /* Double check the GONE flag */ 4850 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4851 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4852 /* nothing around */ 4853 so = NULL; 4854 4855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4856 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4857 /* 4858 * For TCP type we need special handling when we are 4859 * connected. We also include the peel'ed off ones to. 4860 */ 4861 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4862 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4863 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4864 if (so) { 4865 SOCK_LOCK(so); 4866 if (so->so_rcv.sb_cc == 0) { 4867 so->so_state &= ~(SS_ISCONNECTING | 4868 SS_ISDISCONNECTING | 4869 SS_ISCONFIRMING | 4870 SS_ISCONNECTED); 4871 } 4872 socantrcvmore_locked(so); 4873 socantsendmore(so); 4874 sctp_sowwakeup(inp, so); 4875 sctp_sorwakeup(inp, so); 4876 SCTP_SOWAKEUP(so); 4877 } 4878 } 4879 } 4880 /* 4881 * Make it invalid too, that way if its about to run it will abort 4882 * and return. 4883 */ 4884 /* re-increment the lock */ 4885 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4886 atomic_add_int(&stcb->asoc.refcnt, -1); 4887 } 4888 if (stcb->asoc.refcnt) { 4889 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4890 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4891 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4892 SCTP_INP_INFO_WUNLOCK(); 4893 SCTP_INP_WUNLOCK(inp); 4894 } 4895 SCTP_TCB_UNLOCK(stcb); 4896 return (0); 4897 } 4898 asoc->state = 0; 4899 if (inp->sctp_tcbhash) { 4900 LIST_REMOVE(stcb, sctp_tcbhash); 4901 } 4902 if (stcb->asoc.in_asocid_hash) { 4903 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4904 } 4905 /* Now lets remove it from the list of ALL associations in the EP */ 4906 LIST_REMOVE(stcb, sctp_tcblist); 4907 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4908 SCTP_INP_INCR_REF(inp); 4909 SCTP_INP_WUNLOCK(inp); 4910 } 4911 /* pull from vtag hash */ 4912 LIST_REMOVE(stcb, sctp_asocs); 4913 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4914 inp->sctp_lport, stcb->rport); 4915 4916 /* 4917 * Now restop the timers to be sure this is paranoia at is finest! 4918 */ 4919 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4920 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4921 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4922 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4923 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4924 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4925 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4926 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4927 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4928 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4929 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4930 } 4931 4932 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4933 /* 4934 * The chunk lists and such SHOULD be empty but we check them just 4935 * in case. 4936 */ 4937 /* anything on the wheel needs to be removed */ 4938 for (i = 0; i < asoc->streamoutcnt; i++) { 4939 struct sctp_stream_out *outs; 4940 4941 outs = &asoc->strmout[i]; 4942 /* now clean up any chunks here */ 4943 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4944 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4945 TAILQ_REMOVE(&outs->outqueue, sp, next); 4946 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0); 4947 sctp_free_spbufspace(stcb, asoc, sp); 4948 if (sp->data) { 4949 if (so) { 4950 /* Still an open socket - report */ 4951 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4952 0, (void *)sp, SCTP_SO_LOCKED); 4953 } 4954 if (sp->data) { 4955 sctp_m_freem(sp->data); 4956 sp->data = NULL; 4957 sp->tail_mbuf = NULL; 4958 sp->length = 0; 4959 } 4960 } 4961 if (sp->net) { 4962 sctp_free_remote_addr(sp->net); 4963 sp->net = NULL; 4964 } 4965 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4966 } 4967 } 4968 /* sa_ignore FREED_MEMORY */ 4969 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4970 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4971 SCTP_FREE(strrst, SCTP_M_STRESET); 4972 } 4973 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4974 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4975 if (sq->data) { 4976 sctp_m_freem(sq->data); 4977 sq->data = NULL; 4978 } 4979 sctp_free_remote_addr(sq->whoFrom); 4980 sq->whoFrom = NULL; 4981 sq->stcb = NULL; 4982 /* Free the ctl entry */ 4983 sctp_free_a_readq(stcb, sq); 4984 /* sa_ignore FREED_MEMORY */ 4985 } 4986 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4987 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4988 if (chk->data) { 4989 sctp_m_freem(chk->data); 4990 chk->data = NULL; 4991 } 4992 if (chk->holds_key_ref) 4993 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4994 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4995 SCTP_DECR_CHK_COUNT(); 4996 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4997 asoc->free_chunk_cnt--; 4998 /* sa_ignore FREED_MEMORY */ 4999 } 5000 /* pending send queue SHOULD be empty */ 5001 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5002 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5003 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5004 #ifdef INVARIANTS 5005 } else { 5006 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5007 #endif 5008 } 5009 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5010 if (chk->data) { 5011 if (so) { 5012 /* Still a socket? */ 5013 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5014 0, chk, SCTP_SO_LOCKED); 5015 } 5016 if (chk->data) { 5017 sctp_m_freem(chk->data); 5018 chk->data = NULL; 5019 } 5020 } 5021 if (chk->holds_key_ref) 5022 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5023 if (chk->whoTo) { 5024 sctp_free_remote_addr(chk->whoTo); 5025 chk->whoTo = NULL; 5026 } 5027 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5028 SCTP_DECR_CHK_COUNT(); 5029 /* sa_ignore FREED_MEMORY */ 5030 } 5031 /* sent queue SHOULD be empty */ 5032 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5033 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5034 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5035 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5036 #ifdef INVARIANTS 5037 } else { 5038 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5039 #endif 5040 } 5041 } 5042 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5043 if (chk->data) { 5044 if (so) { 5045 /* Still a socket? */ 5046 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5047 0, chk, SCTP_SO_LOCKED); 5048 } 5049 if (chk->data) { 5050 sctp_m_freem(chk->data); 5051 chk->data = NULL; 5052 } 5053 } 5054 if (chk->holds_key_ref) 5055 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5056 sctp_free_remote_addr(chk->whoTo); 5057 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5058 SCTP_DECR_CHK_COUNT(); 5059 /* sa_ignore FREED_MEMORY */ 5060 } 5061 #ifdef INVARIANTS 5062 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5063 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5064 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5065 } 5066 } 5067 #endif 5068 /* control queue MAY not be empty */ 5069 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5070 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5071 if (chk->data) { 5072 sctp_m_freem(chk->data); 5073 chk->data = NULL; 5074 } 5075 if (chk->holds_key_ref) 5076 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5077 sctp_free_remote_addr(chk->whoTo); 5078 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5079 SCTP_DECR_CHK_COUNT(); 5080 /* sa_ignore FREED_MEMORY */ 5081 } 5082 /* ASCONF queue MAY not be empty */ 5083 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5084 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5085 if (chk->data) { 5086 sctp_m_freem(chk->data); 5087 chk->data = NULL; 5088 } 5089 if (chk->holds_key_ref) 5090 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5091 sctp_free_remote_addr(chk->whoTo); 5092 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5093 SCTP_DECR_CHK_COUNT(); 5094 /* sa_ignore FREED_MEMORY */ 5095 } 5096 if (asoc->mapping_array) { 5097 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5098 asoc->mapping_array = NULL; 5099 } 5100 if (asoc->nr_mapping_array) { 5101 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5102 asoc->nr_mapping_array = NULL; 5103 } 5104 /* the stream outs */ 5105 if (asoc->strmout) { 5106 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5107 asoc->strmout = NULL; 5108 } 5109 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5110 if (asoc->strmin) { 5111 for (i = 0; i < asoc->streamincnt; i++) { 5112 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5113 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5114 } 5115 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5116 asoc->strmin = NULL; 5117 } 5118 asoc->streamincnt = 0; 5119 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5120 #ifdef INVARIANTS 5121 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5122 panic("no net's left alloc'ed, or list points to itself"); 5123 } 5124 #endif 5125 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5126 sctp_free_remote_addr(net); 5127 } 5128 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5129 /* sa_ignore FREED_MEMORY */ 5130 sctp_remove_laddr(laddr); 5131 } 5132 5133 /* pending asconf (address) parameters */ 5134 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5135 /* sa_ignore FREED_MEMORY */ 5136 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5137 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5138 } 5139 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5140 /* sa_ignore FREED_MEMORY */ 5141 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5142 if (aack->data != NULL) { 5143 sctp_m_freem(aack->data); 5144 } 5145 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5146 } 5147 /* clean up auth stuff */ 5148 if (asoc->local_hmacs) 5149 sctp_free_hmaclist(asoc->local_hmacs); 5150 if (asoc->peer_hmacs) 5151 sctp_free_hmaclist(asoc->peer_hmacs); 5152 5153 if (asoc->local_auth_chunks) 5154 sctp_free_chunklist(asoc->local_auth_chunks); 5155 if (asoc->peer_auth_chunks) 5156 sctp_free_chunklist(asoc->peer_auth_chunks); 5157 5158 sctp_free_authinfo(&asoc->authinfo); 5159 5160 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5161 LIST_REMOVE(shared_key, next); 5162 sctp_free_sharedkey(shared_key); 5163 /* sa_ignore FREED_MEMORY */ 5164 } 5165 5166 /* Insert new items here :> */ 5167 5168 /* Get rid of LOCK */ 5169 SCTP_TCB_UNLOCK(stcb); 5170 SCTP_TCB_LOCK_DESTROY(stcb); 5171 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5172 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5173 SCTP_INP_INFO_WUNLOCK(); 5174 SCTP_INP_RLOCK(inp); 5175 } 5176 #ifdef SCTP_TRACK_FREED_ASOCS 5177 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5178 /* now clean up the tasoc itself */ 5179 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5180 SCTP_DECR_ASOC_COUNT(); 5181 } else { 5182 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5183 } 5184 #else 5185 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5186 SCTP_DECR_ASOC_COUNT(); 5187 #endif 5188 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5189 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5190 /* 5191 * If its NOT the inp_free calling us AND sctp_close 5192 * as been called, we call back... 5193 */ 5194 SCTP_INP_RUNLOCK(inp); 5195 /* 5196 * This will start the kill timer (if we are the 5197 * last one) since we hold an increment yet. But 5198 * this is the only safe way to do this since 5199 * otherwise if the socket closes at the same time 5200 * we are here we might collide in the cleanup. 5201 */ 5202 sctp_inpcb_free(inp, 5203 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5204 SCTP_CALLED_DIRECTLY_NOCMPSET); 5205 SCTP_INP_DECR_REF(inp); 5206 goto out_of; 5207 } else { 5208 /* The socket is still open. */ 5209 SCTP_INP_DECR_REF(inp); 5210 } 5211 } 5212 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5213 SCTP_INP_RUNLOCK(inp); 5214 } 5215 out_of: 5216 /* destroyed the asoc */ 5217 #ifdef SCTP_LOG_CLOSING 5218 sctp_log_closing(inp, NULL, 11); 5219 #endif 5220 return (1); 5221 } 5222 5223 5224 5225 /* 5226 * determine if a destination is "reachable" based upon the addresses bound 5227 * to the current endpoint (e.g. only v4 or v6 currently bound) 5228 */ 5229 /* 5230 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5231 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5232 * types bound as its endpoint 5233 */ 5234 int 5235 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5236 { 5237 struct sctp_inpcb *inp; 5238 int answer; 5239 5240 /* 5241 * No locks here, the TCB, in all cases is already locked and an 5242 * assoc is up. There is either a INP lock by the caller applied (in 5243 * asconf case when deleting an address) or NOT in the HB case, 5244 * however if HB then the INP increment is up and the INP will not 5245 * be removed (on top of the fact that we have a TCB lock). So we 5246 * only want to read the sctp_flags, which is either bound-all or 5247 * not.. no protection needed since once an assoc is up you can't be 5248 * changing your binding. 5249 */ 5250 inp = stcb->sctp_ep; 5251 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5252 /* if bound all, destination is not restricted */ 5253 /* 5254 * RRS: Question during lock work: Is this correct? If you 5255 * are bound-all you still might need to obey the V4--V6 5256 * flags??? IMO this bound-all stuff needs to be removed! 5257 */ 5258 return (1); 5259 } 5260 /* NOTE: all "scope" checks are done when local addresses are added */ 5261 switch (destaddr->sa_family) { 5262 #ifdef INET6 5263 case AF_INET6: 5264 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5265 break; 5266 #endif 5267 #ifdef INET 5268 case AF_INET: 5269 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5270 break; 5271 #endif 5272 default: 5273 /* invalid family, so it's unreachable */ 5274 answer = 0; 5275 break; 5276 } 5277 return (answer); 5278 } 5279 5280 /* 5281 * update the inp_vflags on an endpoint 5282 */ 5283 static void 5284 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5285 { 5286 struct sctp_laddr *laddr; 5287 5288 /* first clear the flag */ 5289 inp->ip_inp.inp.inp_vflag = 0; 5290 /* set the flag based on addresses on the ep list */ 5291 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5292 if (laddr->ifa == NULL) { 5293 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5294 __func__); 5295 continue; 5296 } 5297 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5298 continue; 5299 } 5300 switch (laddr->ifa->address.sa.sa_family) { 5301 #ifdef INET6 5302 case AF_INET6: 5303 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5304 break; 5305 #endif 5306 #ifdef INET 5307 case AF_INET: 5308 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5309 break; 5310 #endif 5311 default: 5312 break; 5313 } 5314 } 5315 } 5316 5317 /* 5318 * Add the address to the endpoint local address list There is nothing to be 5319 * done if we are bound to all addresses 5320 */ 5321 void 5322 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5323 { 5324 struct sctp_laddr *laddr; 5325 struct sctp_tcb *stcb; 5326 int fnd, error = 0; 5327 5328 fnd = 0; 5329 5330 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5331 /* You are already bound to all. You have it already */ 5332 return; 5333 } 5334 #ifdef INET6 5335 if (ifa->address.sa.sa_family == AF_INET6) { 5336 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5337 /* Can't bind a non-useable addr. */ 5338 return; 5339 } 5340 } 5341 #endif 5342 /* first, is it already present? */ 5343 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5344 if (laddr->ifa == ifa) { 5345 fnd = 1; 5346 break; 5347 } 5348 } 5349 5350 if (fnd == 0) { 5351 /* Not in the ep list */ 5352 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5353 if (error != 0) 5354 return; 5355 inp->laddr_count++; 5356 /* update inp_vflag flags */ 5357 switch (ifa->address.sa.sa_family) { 5358 #ifdef INET6 5359 case AF_INET6: 5360 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5361 break; 5362 #endif 5363 #ifdef INET 5364 case AF_INET: 5365 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5366 break; 5367 #endif 5368 default: 5369 break; 5370 } 5371 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5372 sctp_add_local_addr_restricted(stcb, ifa); 5373 } 5374 } 5375 return; 5376 } 5377 5378 5379 /* 5380 * select a new (hopefully reachable) destination net (should only be used 5381 * when we deleted an ep addr that is the only usable source address to reach 5382 * the destination net) 5383 */ 5384 static void 5385 sctp_select_primary_destination(struct sctp_tcb *stcb) 5386 { 5387 struct sctp_nets *net; 5388 5389 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5390 /* for now, we'll just pick the first reachable one we find */ 5391 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5392 continue; 5393 if (sctp_destination_is_reachable(stcb, 5394 (struct sockaddr *)&net->ro._l_addr)) { 5395 /* found a reachable destination */ 5396 stcb->asoc.primary_destination = net; 5397 } 5398 } 5399 /* I can't there from here! ...we're gonna die shortly... */ 5400 } 5401 5402 5403 /* 5404 * Delete the address from the endpoint local address list. There is nothing 5405 * to be done if we are bound to all addresses 5406 */ 5407 void 5408 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5409 { 5410 struct sctp_laddr *laddr; 5411 int fnd; 5412 5413 fnd = 0; 5414 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5415 /* You are already bound to all. You have it already */ 5416 return; 5417 } 5418 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5419 if (laddr->ifa == ifa) { 5420 fnd = 1; 5421 break; 5422 } 5423 } 5424 if (fnd && (inp->laddr_count < 2)) { 5425 /* can't delete unless there are at LEAST 2 addresses */ 5426 return; 5427 } 5428 if (fnd) { 5429 /* 5430 * clean up any use of this address go through our 5431 * associations and clear any last_used_address that match 5432 * this one for each assoc, see if a new primary_destination 5433 * is needed 5434 */ 5435 struct sctp_tcb *stcb; 5436 5437 /* clean up "next_addr_touse" */ 5438 if (inp->next_addr_touse == laddr) 5439 /* delete this address */ 5440 inp->next_addr_touse = NULL; 5441 5442 /* clean up "last_used_address" */ 5443 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5444 struct sctp_nets *net; 5445 5446 SCTP_TCB_LOCK(stcb); 5447 if (stcb->asoc.last_used_address == laddr) 5448 /* delete this address */ 5449 stcb->asoc.last_used_address = NULL; 5450 /* Now spin through all the nets and purge any ref 5451 * to laddr */ 5452 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5453 if (net->ro._s_addr == laddr->ifa) { 5454 /* Yep, purge src address selected */ 5455 sctp_rtentry_t *rt; 5456 5457 /* delete this address if cached */ 5458 rt = net->ro.ro_rt; 5459 if (rt != NULL) { 5460 RTFREE(rt); 5461 net->ro.ro_rt = NULL; 5462 } 5463 sctp_free_ifa(net->ro._s_addr); 5464 net->ro._s_addr = NULL; 5465 net->src_addr_selected = 0; 5466 } 5467 } 5468 SCTP_TCB_UNLOCK(stcb); 5469 } /* for each tcb */ 5470 /* remove it from the ep list */ 5471 sctp_remove_laddr(laddr); 5472 inp->laddr_count--; 5473 /* update inp_vflag flags */ 5474 sctp_update_ep_vflag(inp); 5475 } 5476 return; 5477 } 5478 5479 /* 5480 * Add the address to the TCB local address restricted list. 5481 * This is a "pending" address list (eg. addresses waiting for an 5482 * ASCONF-ACK response) and cannot be used as a valid source address. 5483 */ 5484 void 5485 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5486 { 5487 struct sctp_laddr *laddr; 5488 struct sctpladdr *list; 5489 5490 /* 5491 * Assumes TCB is locked.. and possibly the INP. May need to 5492 * confirm/fix that if we need it and is not the case. 5493 */ 5494 list = &stcb->asoc.sctp_restricted_addrs; 5495 5496 #ifdef INET6 5497 if (ifa->address.sa.sa_family == AF_INET6) { 5498 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5499 /* Can't bind a non-existent addr. */ 5500 return; 5501 } 5502 } 5503 #endif 5504 /* does the address already exist? */ 5505 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5506 if (laddr->ifa == ifa) { 5507 return; 5508 } 5509 } 5510 5511 /* add to the list */ 5512 (void)sctp_insert_laddr(list, ifa, 0); 5513 return; 5514 } 5515 5516 /* 5517 * Remove a local address from the TCB local address restricted list 5518 */ 5519 void 5520 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5521 { 5522 struct sctp_inpcb *inp; 5523 struct sctp_laddr *laddr; 5524 5525 /* 5526 * This is called by asconf work. It is assumed that a) The TCB is 5527 * locked and b) The INP is locked. This is true in as much as I can 5528 * trace through the entry asconf code where I did these locks. 5529 * Again, the ASCONF code is a bit different in that it does lock 5530 * the INP during its work often times. This must be since we don't 5531 * want other proc's looking up things while what they are looking 5532 * up is changing :-D 5533 */ 5534 5535 inp = stcb->sctp_ep; 5536 /* if subset bound and don't allow ASCONF's, can't delete last */ 5537 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5538 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5539 if (stcb->sctp_ep->laddr_count < 2) { 5540 /* can't delete last address */ 5541 return; 5542 } 5543 } 5544 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5545 /* remove the address if it exists */ 5546 if (laddr->ifa == NULL) 5547 continue; 5548 if (laddr->ifa == ifa) { 5549 sctp_remove_laddr(laddr); 5550 return; 5551 } 5552 } 5553 5554 /* address not found! */ 5555 return; 5556 } 5557 5558 /* 5559 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5560 */ 5561 /* sysctl */ 5562 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5563 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5564 5565 5566 5567 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5568 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5569 int *sctp_cpuarry = NULL; 5570 void 5571 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5572 { 5573 /* Queue a packet to a processor for the specified core */ 5574 struct sctp_mcore_queue *qent; 5575 struct sctp_mcore_ctrl *wkq; 5576 int need_wake = 0; 5577 5578 if (sctp_mcore_workers == NULL) { 5579 /* Something went way bad during setup */ 5580 sctp_input_with_port(m, off, 0); 5581 return; 5582 } 5583 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5584 (sizeof(struct sctp_mcore_queue)), 5585 SCTP_M_MCORE); 5586 if (qent == NULL) { 5587 /* This is trouble */ 5588 sctp_input_with_port(m, off, 0); 5589 return; 5590 } 5591 qent->vn = curvnet; 5592 qent->m = m; 5593 qent->off = off; 5594 qent->v6 = 0; 5595 wkq = &sctp_mcore_workers[cpu_to_use]; 5596 SCTP_MCORE_QLOCK(wkq); 5597 5598 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5599 if (wkq->running == 0) { 5600 need_wake = 1; 5601 } 5602 SCTP_MCORE_QUNLOCK(wkq); 5603 if (need_wake) { 5604 wakeup(&wkq->running); 5605 } 5606 } 5607 5608 static void 5609 sctp_mcore_thread(void *arg) 5610 { 5611 5612 struct sctp_mcore_ctrl *wkq; 5613 struct sctp_mcore_queue *qent; 5614 5615 wkq = (struct sctp_mcore_ctrl *)arg; 5616 struct mbuf *m; 5617 int off, v6; 5618 5619 /* Wait for first tickle */ 5620 SCTP_MCORE_LOCK(wkq); 5621 wkq->running = 0; 5622 msleep(&wkq->running, 5623 &wkq->core_mtx, 5624 0, "wait for pkt", 0); 5625 SCTP_MCORE_UNLOCK(wkq); 5626 5627 /* Bind to our cpu */ 5628 thread_lock(curthread); 5629 sched_bind(curthread, wkq->cpuid); 5630 thread_unlock(curthread); 5631 5632 /* Now lets start working */ 5633 SCTP_MCORE_LOCK(wkq); 5634 /* Now grab lock and go */ 5635 for (;;) { 5636 SCTP_MCORE_QLOCK(wkq); 5637 skip_sleep: 5638 wkq->running = 1; 5639 qent = TAILQ_FIRST(&wkq->que); 5640 if (qent) { 5641 TAILQ_REMOVE(&wkq->que, qent, next); 5642 SCTP_MCORE_QUNLOCK(wkq); 5643 CURVNET_SET(qent->vn); 5644 m = qent->m; 5645 off = qent->off; 5646 v6 = qent->v6; 5647 SCTP_FREE(qent, SCTP_M_MCORE); 5648 if (v6 == 0) { 5649 sctp_input_with_port(m, off, 0); 5650 } else { 5651 SCTP_PRINTF("V6 not yet supported\n"); 5652 sctp_m_freem(m); 5653 } 5654 CURVNET_RESTORE(); 5655 SCTP_MCORE_QLOCK(wkq); 5656 } 5657 wkq->running = 0; 5658 if (!TAILQ_EMPTY(&wkq->que)) { 5659 goto skip_sleep; 5660 } 5661 SCTP_MCORE_QUNLOCK(wkq); 5662 msleep(&wkq->running, 5663 &wkq->core_mtx, 5664 0, "wait for pkt", 0); 5665 } 5666 } 5667 5668 static void 5669 sctp_startup_mcore_threads(void) 5670 { 5671 int i, cpu; 5672 5673 if (mp_ncpus == 1) 5674 return; 5675 5676 if (sctp_mcore_workers != NULL) { 5677 /* 5678 * Already been here in some previous vnet? 5679 */ 5680 return; 5681 } 5682 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5683 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5684 SCTP_M_MCORE); 5685 if (sctp_mcore_workers == NULL) { 5686 /* TSNH I hope */ 5687 return; 5688 } 5689 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5690 sizeof(struct sctp_mcore_ctrl))); 5691 /* Init the structures */ 5692 for (i = 0; i <= mp_maxid; i++) { 5693 TAILQ_INIT(&sctp_mcore_workers[i].que); 5694 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5695 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5696 sctp_mcore_workers[i].cpuid = i; 5697 } 5698 if (sctp_cpuarry == NULL) { 5699 SCTP_MALLOC(sctp_cpuarry, int *, 5700 (mp_ncpus * sizeof(int)), 5701 SCTP_M_MCORE); 5702 i = 0; 5703 CPU_FOREACH(cpu) { 5704 sctp_cpuarry[i] = cpu; 5705 i++; 5706 } 5707 } 5708 /* Now start them all */ 5709 CPU_FOREACH(cpu) { 5710 (void)kproc_create(sctp_mcore_thread, 5711 (void *)&sctp_mcore_workers[cpu], 5712 &sctp_mcore_workers[cpu].thread_proc, 5713 RFPROC, 5714 SCTP_KTHREAD_PAGES, 5715 SCTP_MCORE_NAME); 5716 5717 } 5718 } 5719 #endif 5720 5721 void 5722 sctp_pcb_init() 5723 { 5724 /* 5725 * SCTP initialization for the PCB structures should be called by 5726 * the sctp_init() function. 5727 */ 5728 int i; 5729 struct timeval tv; 5730 5731 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5732 /* error I was called twice */ 5733 return; 5734 } 5735 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5736 5737 #if defined(SCTP_LOCAL_TRACE_BUF) 5738 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5739 #endif 5740 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5741 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5742 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5743 SCTP_M_MCORE); 5744 #endif 5745 (void)SCTP_GETTIME_TIMEVAL(&tv); 5746 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5747 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5748 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5749 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5750 #else 5751 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5752 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5753 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5754 #endif 5755 /* init the empty list of (All) Endpoints */ 5756 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5757 5758 5759 /* init the hash table of endpoints */ 5760 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5761 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5762 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5763 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5764 &SCTP_BASE_INFO(hashasocmark)); 5765 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5766 &SCTP_BASE_INFO(hashmark)); 5767 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5768 &SCTP_BASE_INFO(hashtcpmark)); 5769 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5770 5771 5772 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5773 &SCTP_BASE_INFO(hashvrfmark)); 5774 5775 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5776 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5777 /* init the zones */ 5778 /* 5779 * FIX ME: Should check for NULL returns, but if it does fail we are 5780 * doomed to panic anyways... add later maybe. 5781 */ 5782 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5783 sizeof(struct sctp_inpcb), maxsockets); 5784 5785 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5786 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5787 5788 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5789 sizeof(struct sctp_laddr), 5790 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5791 5792 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5793 sizeof(struct sctp_nets), 5794 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5795 5796 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5797 sizeof(struct sctp_tmit_chunk), 5798 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5799 5800 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5801 sizeof(struct sctp_queued_to_read), 5802 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5803 5804 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5805 sizeof(struct sctp_stream_queue_pending), 5806 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5807 5808 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5809 sizeof(struct sctp_asconf), 5810 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5811 5812 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5813 sizeof(struct sctp_asconf_ack), 5814 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5815 5816 5817 /* Master Lock INIT for info structure */ 5818 SCTP_INP_INFO_LOCK_INIT(); 5819 SCTP_STATLOG_INIT_LOCK(); 5820 5821 SCTP_IPI_COUNT_INIT(); 5822 SCTP_IPI_ADDR_INIT(); 5823 #ifdef SCTP_PACKET_LOGGING 5824 SCTP_IP_PKTLOG_INIT(); 5825 #endif 5826 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5827 5828 SCTP_WQ_ADDR_INIT(); 5829 /* not sure if we need all the counts */ 5830 SCTP_BASE_INFO(ipi_count_ep) = 0; 5831 /* assoc/tcb zone info */ 5832 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5833 /* local addrlist zone info */ 5834 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5835 /* remote addrlist zone info */ 5836 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5837 /* chunk info */ 5838 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5839 5840 /* socket queue zone info */ 5841 SCTP_BASE_INFO(ipi_count_readq) = 0; 5842 5843 /* stream out queue cont */ 5844 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5845 5846 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5847 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5848 5849 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5850 5851 /* Init the TIMEWAIT list */ 5852 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5853 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5854 } 5855 sctp_startup_iterator(); 5856 5857 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5858 sctp_startup_mcore_threads(); 5859 #endif 5860 5861 /* 5862 * INIT the default VRF which for BSD is the only one, other O/S's 5863 * may have more. But initially they must start with one and then 5864 * add the VRF's as addresses are added. 5865 */ 5866 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5867 } 5868 5869 /* 5870 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5871 */ 5872 void 5873 sctp_pcb_finish(void) 5874 { 5875 struct sctp_vrflist *vrf_bucket; 5876 struct sctp_vrf *vrf, *nvrf; 5877 struct sctp_ifn *ifn, *nifn; 5878 struct sctp_ifa *ifa, *nifa; 5879 struct sctpvtaghead *chain; 5880 struct sctp_tagblock *twait_block, *prev_twait_block; 5881 struct sctp_laddr *wi, *nwi; 5882 int i; 5883 struct sctp_iterator *it, *nit; 5884 5885 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5886 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5887 return; 5888 } 5889 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5890 /* 5891 * In FreeBSD the iterator thread never exits but we do clean up. 5892 * The only way FreeBSD reaches here is if we have VRF's but we 5893 * still add the ifdef to make it compile on old versions. 5894 */ 5895 retry: 5896 SCTP_IPI_ITERATOR_WQ_LOCK(); 5897 /* 5898 * sctp_iterator_worker() might be working on an it entry without 5899 * holding the lock. We won't find it on the list either and 5900 * continue and free/destroy it. While holding the lock, spin, to 5901 * avoid the race condition as sctp_iterator_worker() will have to 5902 * wait to re-aquire the lock. 5903 */ 5904 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5905 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5906 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5907 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5908 DELAY(10); 5909 goto retry; 5910 } 5911 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5912 if (it->vn != curvnet) { 5913 continue; 5914 } 5915 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5916 if (it->function_atend != NULL) { 5917 (*it->function_atend) (it->pointer, it->val); 5918 } 5919 SCTP_FREE(it, SCTP_M_ITER); 5920 } 5921 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5922 SCTP_ITERATOR_LOCK(); 5923 if ((sctp_it_ctl.cur_it) && 5924 (sctp_it_ctl.cur_it->vn == curvnet)) { 5925 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5926 } 5927 SCTP_ITERATOR_UNLOCK(); 5928 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5929 SCTP_WQ_ADDR_LOCK(); 5930 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5931 LIST_REMOVE(wi, sctp_nxt_addr); 5932 SCTP_DECR_LADDR_COUNT(); 5933 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5934 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5935 } 5936 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5937 } 5938 SCTP_WQ_ADDR_UNLOCK(); 5939 5940 /* 5941 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5942 * destroyed first). 5943 */ 5944 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5945 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5946 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5947 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5948 /* free the ifa */ 5949 LIST_REMOVE(ifa, next_bucket); 5950 LIST_REMOVE(ifa, next_ifa); 5951 SCTP_FREE(ifa, SCTP_M_IFA); 5952 } 5953 /* free the ifn */ 5954 LIST_REMOVE(ifn, next_bucket); 5955 LIST_REMOVE(ifn, next_ifn); 5956 SCTP_FREE(ifn, SCTP_M_IFN); 5957 } 5958 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5959 /* free the vrf */ 5960 LIST_REMOVE(vrf, next_vrf); 5961 SCTP_FREE(vrf, SCTP_M_VRF); 5962 } 5963 /* free the vrf hashes */ 5964 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5965 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5966 5967 /* 5968 * free the TIMEWAIT list elements malloc'd in the function 5969 * sctp_add_vtag_to_timewait()... 5970 */ 5971 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5972 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5973 if (!LIST_EMPTY(chain)) { 5974 prev_twait_block = NULL; 5975 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5976 if (prev_twait_block) { 5977 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5978 } 5979 prev_twait_block = twait_block; 5980 } 5981 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5982 } 5983 } 5984 5985 /* free the locks and mutexes */ 5986 #ifdef SCTP_PACKET_LOGGING 5987 SCTP_IP_PKTLOG_DESTROY(); 5988 #endif 5989 SCTP_IPI_ADDR_DESTROY(); 5990 SCTP_STATLOG_DESTROY(); 5991 SCTP_INP_INFO_LOCK_DESTROY(); 5992 5993 SCTP_WQ_ADDR_DESTROY(); 5994 5995 /* Get rid of other stuff too. */ 5996 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5997 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5998 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5999 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6000 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6001 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6002 6003 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6004 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6005 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6006 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6007 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6008 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6009 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6010 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6011 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6012 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6013 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6014 #endif 6015 } 6016 6017 6018 int 6019 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6020 int offset, int limit, 6021 struct sockaddr *src, struct sockaddr *dst, 6022 struct sockaddr *altsa, uint16_t port) 6023 { 6024 /* 6025 * grub through the INIT pulling addresses and loading them to the 6026 * nets structure in the asoc. The from address in the mbuf should 6027 * also be loaded (if it is not already). This routine can be called 6028 * with either INIT or INIT-ACK's as long as the m points to the IP 6029 * packet and the offset points to the beginning of the parameters. 6030 */ 6031 struct sctp_inpcb *inp; 6032 struct sctp_nets *net, *nnet, *net_tmp; 6033 struct sctp_paramhdr *phdr, parm_buf; 6034 struct sctp_tcb *stcb_tmp; 6035 uint16_t ptype, plen; 6036 struct sockaddr *sa; 6037 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6038 struct sctp_auth_random *p_random = NULL; 6039 uint16_t random_len = 0; 6040 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6041 struct sctp_auth_hmac_algo *hmacs = NULL; 6042 uint16_t hmacs_len = 0; 6043 uint8_t saw_asconf = 0; 6044 uint8_t saw_asconf_ack = 0; 6045 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6046 struct sctp_auth_chunk_list *chunks = NULL; 6047 uint16_t num_chunks = 0; 6048 sctp_key_t *new_key; 6049 uint32_t keylen; 6050 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6051 uint8_t peer_supports_ecn; 6052 uint8_t peer_supports_prsctp; 6053 uint8_t peer_supports_auth; 6054 uint8_t peer_supports_asconf; 6055 uint8_t peer_supports_asconf_ack; 6056 uint8_t peer_supports_reconfig; 6057 uint8_t peer_supports_nrsack; 6058 uint8_t peer_supports_pktdrop; 6059 uint8_t peer_supports_idata; 6060 #ifdef INET 6061 struct sockaddr_in sin; 6062 #endif 6063 #ifdef INET6 6064 struct sockaddr_in6 sin6; 6065 #endif 6066 6067 /* First get the destination address setup too. */ 6068 #ifdef INET 6069 memset(&sin, 0, sizeof(sin)); 6070 sin.sin_family = AF_INET; 6071 sin.sin_len = sizeof(sin); 6072 sin.sin_port = stcb->rport; 6073 #endif 6074 #ifdef INET6 6075 memset(&sin6, 0, sizeof(sin6)); 6076 sin6.sin6_family = AF_INET6; 6077 sin6.sin6_len = sizeof(struct sockaddr_in6); 6078 sin6.sin6_port = stcb->rport; 6079 #endif 6080 if (altsa) { 6081 sa = altsa; 6082 } else { 6083 sa = src; 6084 } 6085 peer_supports_idata = 0; 6086 peer_supports_ecn = 0; 6087 peer_supports_prsctp = 0; 6088 peer_supports_auth = 0; 6089 peer_supports_asconf = 0; 6090 peer_supports_reconfig = 0; 6091 peer_supports_nrsack = 0; 6092 peer_supports_pktdrop = 0; 6093 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6094 /* mark all addresses that we have currently on the list */ 6095 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6096 } 6097 /* does the source address already exist? if so skip it */ 6098 inp = stcb->sctp_ep; 6099 atomic_add_int(&stcb->asoc.refcnt, 1); 6100 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6101 atomic_add_int(&stcb->asoc.refcnt, -1); 6102 6103 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6104 /* we must add the source address */ 6105 /* no scope set here since we have a tcb already. */ 6106 switch (sa->sa_family) { 6107 #ifdef INET 6108 case AF_INET: 6109 if (stcb->asoc.scope.ipv4_addr_legal) { 6110 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6111 return (-1); 6112 } 6113 } 6114 break; 6115 #endif 6116 #ifdef INET6 6117 case AF_INET6: 6118 if (stcb->asoc.scope.ipv6_addr_legal) { 6119 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6120 return (-2); 6121 } 6122 } 6123 break; 6124 #endif 6125 default: 6126 break; 6127 } 6128 } else { 6129 if (net_tmp != NULL && stcb_tmp == stcb) { 6130 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6131 } else if (stcb_tmp != stcb) { 6132 /* It belongs to another association? */ 6133 if (stcb_tmp) 6134 SCTP_TCB_UNLOCK(stcb_tmp); 6135 return (-3); 6136 } 6137 } 6138 if (stcb->asoc.state == 0) { 6139 /* the assoc was freed? */ 6140 return (-4); 6141 } 6142 /* now we must go through each of the params. */ 6143 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6144 while (phdr) { 6145 ptype = ntohs(phdr->param_type); 6146 plen = ntohs(phdr->param_length); 6147 /* 6148 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6149 * (uint32_t)ptype, (int)plen); 6150 */ 6151 if (offset + plen > limit) { 6152 break; 6153 } 6154 if (plen == 0) { 6155 break; 6156 } 6157 #ifdef INET 6158 if (ptype == SCTP_IPV4_ADDRESS) { 6159 if (stcb->asoc.scope.ipv4_addr_legal) { 6160 struct sctp_ipv4addr_param *p4, p4_buf; 6161 6162 /* ok get the v4 address and check/add */ 6163 phdr = sctp_get_next_param(m, offset, 6164 (struct sctp_paramhdr *)&p4_buf, 6165 sizeof(p4_buf)); 6166 if (plen != sizeof(struct sctp_ipv4addr_param) || 6167 phdr == NULL) { 6168 return (-5); 6169 } 6170 p4 = (struct sctp_ipv4addr_param *)phdr; 6171 sin.sin_addr.s_addr = p4->addr; 6172 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6173 /* Skip multi-cast addresses */ 6174 goto next_param; 6175 } 6176 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6177 (sin.sin_addr.s_addr == INADDR_ANY)) { 6178 goto next_param; 6179 } 6180 sa = (struct sockaddr *)&sin; 6181 inp = stcb->sctp_ep; 6182 atomic_add_int(&stcb->asoc.refcnt, 1); 6183 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6184 dst, stcb); 6185 atomic_add_int(&stcb->asoc.refcnt, -1); 6186 6187 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6188 inp == NULL) { 6189 /* we must add the source address */ 6190 /* 6191 * no scope set since we have a tcb 6192 * already 6193 */ 6194 6195 /* 6196 * we must validate the state again 6197 * here 6198 */ 6199 add_it_now: 6200 if (stcb->asoc.state == 0) { 6201 /* the assoc was freed? */ 6202 return (-7); 6203 } 6204 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6205 return (-8); 6206 } 6207 } else if (stcb_tmp == stcb) { 6208 if (stcb->asoc.state == 0) { 6209 /* the assoc was freed? */ 6210 return (-10); 6211 } 6212 if (net != NULL) { 6213 /* clear flag */ 6214 net->dest_state &= 6215 ~SCTP_ADDR_NOT_IN_ASSOC; 6216 } 6217 } else { 6218 /* 6219 * strange, address is in another 6220 * assoc? straighten out locks. 6221 */ 6222 if (stcb_tmp) { 6223 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6224 struct mbuf *op_err; 6225 char msg[SCTP_DIAG_INFO_LEN]; 6226 6227 /* in setup state we 6228 * abort this guy */ 6229 snprintf(msg, sizeof(msg), 6230 "%s:%d at %s", __FILE__, __LINE__, __func__); 6231 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6232 msg); 6233 sctp_abort_an_association(stcb_tmp->sctp_ep, 6234 stcb_tmp, op_err, 6235 SCTP_SO_NOT_LOCKED); 6236 goto add_it_now; 6237 } 6238 SCTP_TCB_UNLOCK(stcb_tmp); 6239 } 6240 if (stcb->asoc.state == 0) { 6241 /* the assoc was freed? */ 6242 return (-12); 6243 } 6244 return (-13); 6245 } 6246 } 6247 } else 6248 #endif 6249 #ifdef INET6 6250 if (ptype == SCTP_IPV6_ADDRESS) { 6251 if (stcb->asoc.scope.ipv6_addr_legal) { 6252 /* ok get the v6 address and check/add */ 6253 struct sctp_ipv6addr_param *p6, p6_buf; 6254 6255 phdr = sctp_get_next_param(m, offset, 6256 (struct sctp_paramhdr *)&p6_buf, 6257 sizeof(p6_buf)); 6258 if (plen != sizeof(struct sctp_ipv6addr_param) || 6259 phdr == NULL) { 6260 return (-14); 6261 } 6262 p6 = (struct sctp_ipv6addr_param *)phdr; 6263 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6264 sizeof(p6->addr)); 6265 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6266 /* Skip multi-cast addresses */ 6267 goto next_param; 6268 } 6269 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6270 /* Link local make no sense without 6271 * scope */ 6272 goto next_param; 6273 } 6274 sa = (struct sockaddr *)&sin6; 6275 inp = stcb->sctp_ep; 6276 atomic_add_int(&stcb->asoc.refcnt, 1); 6277 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6278 dst, stcb); 6279 atomic_add_int(&stcb->asoc.refcnt, -1); 6280 if (stcb_tmp == NULL && 6281 (inp == stcb->sctp_ep || inp == NULL)) { 6282 /* 6283 * we must validate the state again 6284 * here 6285 */ 6286 add_it_now6: 6287 if (stcb->asoc.state == 0) { 6288 /* the assoc was freed? */ 6289 return (-16); 6290 } 6291 /* 6292 * we must add the address, no scope 6293 * set 6294 */ 6295 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6296 return (-17); 6297 } 6298 } else if (stcb_tmp == stcb) { 6299 /* 6300 * we must validate the state again 6301 * here 6302 */ 6303 if (stcb->asoc.state == 0) { 6304 /* the assoc was freed? */ 6305 return (-19); 6306 } 6307 if (net != NULL) { 6308 /* clear flag */ 6309 net->dest_state &= 6310 ~SCTP_ADDR_NOT_IN_ASSOC; 6311 } 6312 } else { 6313 /* 6314 * strange, address is in another 6315 * assoc? straighten out locks. 6316 */ 6317 if (stcb_tmp) { 6318 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6319 struct mbuf *op_err; 6320 char msg[SCTP_DIAG_INFO_LEN]; 6321 6322 /* in setup state we 6323 * abort this guy */ 6324 snprintf(msg, sizeof(msg), 6325 "%s:%d at %s", __FILE__, __LINE__, __func__); 6326 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6327 msg); 6328 sctp_abort_an_association(stcb_tmp->sctp_ep, 6329 stcb_tmp, op_err, 6330 SCTP_SO_NOT_LOCKED); 6331 goto add_it_now6; 6332 } 6333 SCTP_TCB_UNLOCK(stcb_tmp); 6334 } 6335 if (stcb->asoc.state == 0) { 6336 /* the assoc was freed? */ 6337 return (-21); 6338 } 6339 return (-22); 6340 } 6341 } 6342 } else 6343 #endif 6344 if (ptype == SCTP_ECN_CAPABLE) { 6345 peer_supports_ecn = 1; 6346 } else if (ptype == SCTP_ULP_ADAPTATION) { 6347 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6348 struct sctp_adaptation_layer_indication ai, 6349 *aip; 6350 6351 phdr = sctp_get_next_param(m, offset, 6352 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6353 aip = (struct sctp_adaptation_layer_indication *)phdr; 6354 if (aip) { 6355 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6356 stcb->asoc.adaptation_needed = 1; 6357 } 6358 } 6359 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6360 struct sctp_asconf_addr_param lstore, *fee; 6361 int lptype; 6362 struct sockaddr *lsa = NULL; 6363 #ifdef INET 6364 struct sctp_asconf_addrv4_param *fii; 6365 #endif 6366 6367 if (stcb->asoc.asconf_supported == 0) { 6368 return (-100); 6369 } 6370 if (plen > sizeof(lstore)) { 6371 return (-23); 6372 } 6373 phdr = sctp_get_next_param(m, offset, 6374 (struct sctp_paramhdr *)&lstore, 6375 min(plen, sizeof(lstore))); 6376 if (phdr == NULL) { 6377 return (-24); 6378 } 6379 fee = (struct sctp_asconf_addr_param *)phdr; 6380 lptype = ntohs(fee->addrp.ph.param_type); 6381 switch (lptype) { 6382 #ifdef INET 6383 case SCTP_IPV4_ADDRESS: 6384 if (plen != 6385 sizeof(struct sctp_asconf_addrv4_param)) { 6386 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6387 (int)sizeof(struct sctp_asconf_addrv4_param), 6388 plen); 6389 } else { 6390 fii = (struct sctp_asconf_addrv4_param *)fee; 6391 sin.sin_addr.s_addr = fii->addrp.addr; 6392 lsa = (struct sockaddr *)&sin; 6393 } 6394 break; 6395 #endif 6396 #ifdef INET6 6397 case SCTP_IPV6_ADDRESS: 6398 if (plen != 6399 sizeof(struct sctp_asconf_addr_param)) { 6400 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6401 (int)sizeof(struct sctp_asconf_addr_param), 6402 plen); 6403 } else { 6404 memcpy(sin6.sin6_addr.s6_addr, 6405 fee->addrp.addr, 6406 sizeof(fee->addrp.addr)); 6407 lsa = (struct sockaddr *)&sin6; 6408 } 6409 break; 6410 #endif 6411 default: 6412 break; 6413 } 6414 if (lsa) { 6415 (void)sctp_set_primary_addr(stcb, sa, NULL); 6416 } 6417 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6418 stcb->asoc.peer_supports_nat = 1; 6419 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6420 /* Peer supports pr-sctp */ 6421 peer_supports_prsctp = 1; 6422 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6423 /* A supported extension chunk */ 6424 struct sctp_supported_chunk_types_param *pr_supported; 6425 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6426 int num_ent, i; 6427 6428 phdr = sctp_get_next_param(m, offset, 6429 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6430 if (phdr == NULL) { 6431 return (-25); 6432 } 6433 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6434 num_ent = plen - sizeof(struct sctp_paramhdr); 6435 for (i = 0; i < num_ent; i++) { 6436 switch (pr_supported->chunk_types[i]) { 6437 case SCTP_ASCONF: 6438 peer_supports_asconf = 1; 6439 break; 6440 case SCTP_ASCONF_ACK: 6441 peer_supports_asconf_ack = 1; 6442 break; 6443 case SCTP_FORWARD_CUM_TSN: 6444 peer_supports_prsctp = 1; 6445 break; 6446 case SCTP_PACKET_DROPPED: 6447 peer_supports_pktdrop = 1; 6448 break; 6449 case SCTP_NR_SELECTIVE_ACK: 6450 peer_supports_nrsack = 1; 6451 break; 6452 case SCTP_STREAM_RESET: 6453 peer_supports_reconfig = 1; 6454 break; 6455 case SCTP_AUTHENTICATION: 6456 peer_supports_auth = 1; 6457 break; 6458 case SCTP_IDATA: 6459 peer_supports_idata = 1; 6460 break; 6461 default: 6462 /* one I have not learned yet */ 6463 break; 6464 6465 } 6466 } 6467 } else if (ptype == SCTP_RANDOM) { 6468 if (plen > sizeof(random_store)) 6469 break; 6470 if (got_random) { 6471 /* already processed a RANDOM */ 6472 goto next_param; 6473 } 6474 phdr = sctp_get_next_param(m, offset, 6475 (struct sctp_paramhdr *)random_store, 6476 min(sizeof(random_store), plen)); 6477 if (phdr == NULL) 6478 return (-26); 6479 p_random = (struct sctp_auth_random *)phdr; 6480 random_len = plen - sizeof(*p_random); 6481 /* enforce the random length */ 6482 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6483 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6484 return (-27); 6485 } 6486 got_random = 1; 6487 } else if (ptype == SCTP_HMAC_LIST) { 6488 uint16_t num_hmacs; 6489 uint16_t i; 6490 6491 if (plen > sizeof(hmacs_store)) 6492 break; 6493 if (got_hmacs) { 6494 /* already processed a HMAC list */ 6495 goto next_param; 6496 } 6497 phdr = sctp_get_next_param(m, offset, 6498 (struct sctp_paramhdr *)hmacs_store, 6499 min(plen, sizeof(hmacs_store))); 6500 if (phdr == NULL) 6501 return (-28); 6502 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6503 hmacs_len = plen - sizeof(*hmacs); 6504 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6505 /* validate the hmac list */ 6506 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6507 return (-29); 6508 } 6509 if (stcb->asoc.peer_hmacs != NULL) 6510 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6511 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6512 if (stcb->asoc.peer_hmacs != NULL) { 6513 for (i = 0; i < num_hmacs; i++) { 6514 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6515 ntohs(hmacs->hmac_ids[i])); 6516 } 6517 } 6518 got_hmacs = 1; 6519 } else if (ptype == SCTP_CHUNK_LIST) { 6520 int i; 6521 6522 if (plen > sizeof(chunks_store)) 6523 break; 6524 if (got_chklist) { 6525 /* already processed a Chunks list */ 6526 goto next_param; 6527 } 6528 phdr = sctp_get_next_param(m, offset, 6529 (struct sctp_paramhdr *)chunks_store, 6530 min(plen, sizeof(chunks_store))); 6531 if (phdr == NULL) 6532 return (-30); 6533 chunks = (struct sctp_auth_chunk_list *)phdr; 6534 num_chunks = plen - sizeof(*chunks); 6535 if (stcb->asoc.peer_auth_chunks != NULL) 6536 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6537 else 6538 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6539 for (i = 0; i < num_chunks; i++) { 6540 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6541 stcb->asoc.peer_auth_chunks); 6542 /* record asconf/asconf-ack if listed */ 6543 if (chunks->chunk_types[i] == SCTP_ASCONF) 6544 saw_asconf = 1; 6545 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6546 saw_asconf_ack = 1; 6547 6548 } 6549 got_chklist = 1; 6550 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6551 (ptype == SCTP_STATE_COOKIE) || 6552 (ptype == SCTP_UNRECOG_PARAM) || 6553 (ptype == SCTP_COOKIE_PRESERVE) || 6554 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6555 (ptype == SCTP_ADD_IP_ADDRESS) || 6556 (ptype == SCTP_DEL_IP_ADDRESS) || 6557 (ptype == SCTP_ERROR_CAUSE_IND) || 6558 (ptype == SCTP_SUCCESS_REPORT)) { 6559 /* don't care */ ; 6560 } else { 6561 if ((ptype & 0x8000) == 0x0000) { 6562 /* 6563 * must stop processing the rest of the 6564 * param's. Any report bits were handled 6565 * with the call to 6566 * sctp_arethere_unrecognized_parameters() 6567 * when the INIT or INIT-ACK was first seen. 6568 */ 6569 break; 6570 } 6571 } 6572 6573 next_param: 6574 offset += SCTP_SIZE32(plen); 6575 if (offset >= limit) { 6576 break; 6577 } 6578 phdr = sctp_get_next_param(m, offset, &parm_buf, 6579 sizeof(parm_buf)); 6580 } 6581 /* Now check to see if we need to purge any addresses */ 6582 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6583 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6584 SCTP_ADDR_NOT_IN_ASSOC) { 6585 /* This address has been removed from the asoc */ 6586 /* remove and free it */ 6587 stcb->asoc.numnets--; 6588 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6589 sctp_free_remote_addr(net); 6590 if (net == stcb->asoc.primary_destination) { 6591 stcb->asoc.primary_destination = NULL; 6592 sctp_select_primary_destination(stcb); 6593 } 6594 } 6595 } 6596 if ((stcb->asoc.ecn_supported == 1) && 6597 (peer_supports_ecn == 0)) { 6598 stcb->asoc.ecn_supported = 0; 6599 } 6600 if ((stcb->asoc.prsctp_supported == 1) && 6601 (peer_supports_prsctp == 0)) { 6602 stcb->asoc.prsctp_supported = 0; 6603 } 6604 if ((stcb->asoc.auth_supported == 1) && 6605 ((peer_supports_auth == 0) || 6606 (got_random == 0) || (got_hmacs == 0))) { 6607 stcb->asoc.auth_supported = 0; 6608 } 6609 if ((stcb->asoc.asconf_supported == 1) && 6610 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6611 (stcb->asoc.auth_supported == 0) || 6612 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6613 stcb->asoc.asconf_supported = 0; 6614 } 6615 if ((stcb->asoc.reconfig_supported == 1) && 6616 (peer_supports_reconfig == 0)) { 6617 stcb->asoc.reconfig_supported = 0; 6618 } 6619 if ((stcb->asoc.idata_supported == 1) && 6620 (peer_supports_idata == 0)) { 6621 stcb->asoc.idata_supported = 0; 6622 } 6623 if ((stcb->asoc.nrsack_supported == 1) && 6624 (peer_supports_nrsack == 0)) { 6625 stcb->asoc.nrsack_supported = 0; 6626 } 6627 if ((stcb->asoc.pktdrop_supported == 1) && 6628 (peer_supports_pktdrop == 0)) { 6629 stcb->asoc.pktdrop_supported = 0; 6630 } 6631 /* validate authentication required parameters */ 6632 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6633 /* peer does not support auth but sent a chunks list? */ 6634 return (-31); 6635 } 6636 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6637 /* peer supports asconf but not auth? */ 6638 return (-32); 6639 } else if ((peer_supports_asconf == 1) && 6640 (peer_supports_auth == 1) && 6641 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6642 return (-33); 6643 } 6644 /* concatenate the full random key */ 6645 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6646 if (chunks != NULL) { 6647 keylen += sizeof(*chunks) + num_chunks; 6648 } 6649 new_key = sctp_alloc_key(keylen); 6650 if (new_key != NULL) { 6651 /* copy in the RANDOM */ 6652 if (p_random != NULL) { 6653 keylen = sizeof(*p_random) + random_len; 6654 bcopy(p_random, new_key->key, keylen); 6655 } 6656 /* append in the AUTH chunks */ 6657 if (chunks != NULL) { 6658 bcopy(chunks, new_key->key + keylen, 6659 sizeof(*chunks) + num_chunks); 6660 keylen += sizeof(*chunks) + num_chunks; 6661 } 6662 /* append in the HMACs */ 6663 if (hmacs != NULL) { 6664 bcopy(hmacs, new_key->key + keylen, 6665 sizeof(*hmacs) + hmacs_len); 6666 } 6667 } else { 6668 /* failed to get memory for the key */ 6669 return (-34); 6670 } 6671 if (stcb->asoc.authinfo.peer_random != NULL) 6672 sctp_free_key(stcb->asoc.authinfo.peer_random); 6673 stcb->asoc.authinfo.peer_random = new_key; 6674 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6675 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6676 6677 return (0); 6678 } 6679 6680 int 6681 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6682 struct sctp_nets *net) 6683 { 6684 /* make sure the requested primary address exists in the assoc */ 6685 if (net == NULL && sa) 6686 net = sctp_findnet(stcb, sa); 6687 6688 if (net == NULL) { 6689 /* didn't find the requested primary address! */ 6690 return (-1); 6691 } else { 6692 /* set the primary address */ 6693 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6694 /* Must be confirmed, so queue to set */ 6695 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6696 return (0); 6697 } 6698 stcb->asoc.primary_destination = net; 6699 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6700 sctp_free_remote_addr(stcb->asoc.alternate); 6701 stcb->asoc.alternate = NULL; 6702 } 6703 net = TAILQ_FIRST(&stcb->asoc.nets); 6704 if (net != stcb->asoc.primary_destination) { 6705 /* 6706 * first one on the list is NOT the primary 6707 * sctp_cmpaddr() is much more efficient if the 6708 * primary is the first on the list, make it so. 6709 */ 6710 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6711 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6712 } 6713 return (0); 6714 } 6715 } 6716 6717 int 6718 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6719 { 6720 /* 6721 * This function serves two purposes. It will see if a TAG can be 6722 * re-used and return 1 for yes it is ok and 0 for don't use that 6723 * tag. A secondary function it will do is purge out old tags that 6724 * can be removed. 6725 */ 6726 struct sctpvtaghead *chain; 6727 struct sctp_tagblock *twait_block; 6728 struct sctpasochead *head; 6729 struct sctp_tcb *stcb; 6730 int i; 6731 6732 SCTP_INP_INFO_RLOCK(); 6733 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6734 SCTP_BASE_INFO(hashasocmark))]; 6735 LIST_FOREACH(stcb, head, sctp_asocs) { 6736 /* 6737 * We choose not to lock anything here. TCB's can't be 6738 * removed since we have the read lock, so they can't be 6739 * freed on us, same thing for the INP. I may be wrong with 6740 * this assumption, but we will go with it for now :-) 6741 */ 6742 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6743 continue; 6744 } 6745 if (stcb->asoc.my_vtag == tag) { 6746 /* candidate */ 6747 if (stcb->rport != rport) { 6748 continue; 6749 } 6750 if (stcb->sctp_ep->sctp_lport != lport) { 6751 continue; 6752 } 6753 /* Its a used tag set */ 6754 SCTP_INP_INFO_RUNLOCK(); 6755 return (0); 6756 } 6757 } 6758 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6759 /* Now what about timed wait ? */ 6760 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6761 /* 6762 * Block(s) are present, lets see if we have this tag in the 6763 * list 6764 */ 6765 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6766 if (twait_block->vtag_block[i].v_tag == 0) { 6767 /* not used */ 6768 continue; 6769 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6770 now->tv_sec) { 6771 /* Audit expires this guy */ 6772 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6773 twait_block->vtag_block[i].v_tag = 0; 6774 twait_block->vtag_block[i].lport = 0; 6775 twait_block->vtag_block[i].rport = 0; 6776 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6777 (twait_block->vtag_block[i].lport == lport) && 6778 (twait_block->vtag_block[i].rport == rport)) { 6779 /* Bad tag, sorry :< */ 6780 SCTP_INP_INFO_RUNLOCK(); 6781 return (0); 6782 } 6783 } 6784 } 6785 SCTP_INP_INFO_RUNLOCK(); 6786 return (1); 6787 } 6788 6789 static void 6790 sctp_drain_mbufs(struct sctp_tcb *stcb) 6791 { 6792 /* 6793 * We must hunt this association for MBUF's past the cumack (i.e. 6794 * out of order data that we can renege on). 6795 */ 6796 struct sctp_association *asoc; 6797 struct sctp_tmit_chunk *chk, *nchk; 6798 uint32_t cumulative_tsn_p1; 6799 struct sctp_queued_to_read *ctl, *nctl; 6800 int cnt, strmat; 6801 uint32_t gap, i; 6802 int fnd = 0; 6803 6804 /* We look for anything larger than the cum-ack + 1 */ 6805 6806 asoc = &stcb->asoc; 6807 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6808 /* none we can reneg on. */ 6809 return; 6810 } 6811 SCTP_STAT_INCR(sctps_protocol_drains_done); 6812 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6813 cnt = 0; 6814 /* Ok that was fun, now we will drain all the inbound streams? */ 6815 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6816 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next_instrm, nctl) { 6817 #ifdef INVARIANTS 6818 if (ctl->on_strm_q != SCTP_ON_ORDERED) { 6819 panic("Huh control: %p on_q: %d -- not ordered?", 6820 ctl, ctl->on_strm_q); 6821 } 6822 #endif 6823 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6824 /* Yep it is above cum-ack */ 6825 cnt++; 6826 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6827 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6828 sctp_ucount_decr(asoc->cnt_on_all_streams); 6829 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6830 if (ctl->on_read_q) { 6831 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next); 6832 ctl->on_read_q = 0; 6833 } 6834 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next_instrm); 6835 ctl->on_strm_q = 0; 6836 if (ctl->data) { 6837 sctp_m_freem(ctl->data); 6838 ctl->data = NULL; 6839 } 6840 sctp_free_remote_addr(ctl->whoFrom); 6841 /* Now its reasm? */ 6842 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 6843 cnt++; 6844 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6845 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6846 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6847 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6848 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 6849 if (chk->data) { 6850 sctp_m_freem(chk->data); 6851 chk->data = NULL; 6852 } 6853 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6854 } 6855 sctp_free_a_readq(stcb, ctl); 6856 } 6857 } 6858 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].uno_inqueue, next_instrm, nctl) { 6859 #ifdef INVARIANTS 6860 if (ctl->on_strm_q != SCTP_ON_UNORDERED) { 6861 panic("Huh control: %p on_q: %d -- not unordered?", 6862 ctl, ctl->on_strm_q); 6863 } 6864 #endif 6865 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6866 /* Yep it is above cum-ack */ 6867 cnt++; 6868 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6869 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6870 sctp_ucount_decr(asoc->cnt_on_all_streams); 6871 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6872 if (ctl->on_read_q) { 6873 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next); 6874 ctl->on_read_q = 0; 6875 } 6876 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, ctl, next_instrm); 6877 ctl->on_strm_q = 0; 6878 if (ctl->data) { 6879 sctp_m_freem(ctl->data); 6880 ctl->data = NULL; 6881 } 6882 sctp_free_remote_addr(ctl->whoFrom); 6883 /* Now its reasm? */ 6884 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 6885 cnt++; 6886 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6887 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6888 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6889 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6890 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 6891 if (chk->data) { 6892 sctp_m_freem(chk->data); 6893 chk->data = NULL; 6894 } 6895 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6896 } 6897 sctp_free_a_readq(stcb, ctl); 6898 } 6899 } 6900 } 6901 if (cnt) { 6902 /* We must back down to see what the new highest is */ 6903 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6904 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6905 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6906 asoc->highest_tsn_inside_map = i; 6907 fnd = 1; 6908 break; 6909 } 6910 } 6911 if (!fnd) { 6912 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6913 } 6914 /* 6915 * Question, should we go through the delivery queue? The 6916 * only reason things are on here is the app not reading OR 6917 * a p-d-api up. An attacker COULD send enough in to 6918 * initiate the PD-API and then send a bunch of stuff to 6919 * other streams... these would wind up on the delivery 6920 * queue.. and then we would not get to them. But in order 6921 * to do this I then have to back-track and un-deliver 6922 * sequence numbers in streams.. el-yucko. I think for now 6923 * we will NOT look at the delivery queue and leave it to be 6924 * something to consider later. An alternative would be to 6925 * abort the P-D-API with a notification and then deliver 6926 * the data.... Or another method might be to keep track of 6927 * how many times the situation occurs and if we see a 6928 * possible attack underway just abort the association. 6929 */ 6930 #ifdef SCTP_DEBUG 6931 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6932 #endif 6933 /* 6934 * Now do we need to find a new 6935 * asoc->highest_tsn_inside_map? 6936 */ 6937 asoc->last_revoke_count = cnt; 6938 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6939 /* sa_ignore NO_NULL_CHK */ 6940 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6941 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6942 } 6943 /* 6944 * Another issue, in un-setting the TSN's in the mapping array we 6945 * DID NOT adjust the highest_tsn marker. This will cause one of 6946 * two things to occur. It may cause us to do extra work in checking 6947 * for our mapping array movement. More importantly it may cause us 6948 * to SACK every datagram. This may not be a bad thing though since 6949 * we will recover once we get our cum-ack above and all this stuff 6950 * we dumped recovered. 6951 */ 6952 } 6953 6954 void 6955 sctp_drain() 6956 { 6957 /* 6958 * We must walk the PCB lists for ALL associations here. The system 6959 * is LOW on MBUF's and needs help. This is where reneging will 6960 * occur. We really hope this does NOT happen! 6961 */ 6962 VNET_ITERATOR_DECL(vnet_iter); 6963 VNET_LIST_RLOCK_NOSLEEP(); 6964 VNET_FOREACH(vnet_iter) { 6965 CURVNET_SET(vnet_iter); 6966 struct sctp_inpcb *inp; 6967 struct sctp_tcb *stcb; 6968 6969 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6970 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6971 #ifdef VIMAGE 6972 continue; 6973 #else 6974 return; 6975 #endif 6976 } 6977 SCTP_INP_INFO_RLOCK(); 6978 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6979 /* For each endpoint */ 6980 SCTP_INP_RLOCK(inp); 6981 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6982 /* For each association */ 6983 SCTP_TCB_LOCK(stcb); 6984 sctp_drain_mbufs(stcb); 6985 SCTP_TCB_UNLOCK(stcb); 6986 } 6987 SCTP_INP_RUNLOCK(inp); 6988 } 6989 SCTP_INP_INFO_RUNLOCK(); 6990 CURVNET_RESTORE(); 6991 } 6992 VNET_LIST_RUNLOCK_NOSLEEP(); 6993 } 6994 6995 /* 6996 * start a new iterator 6997 * iterates through all endpoints and associations based on the pcb_state 6998 * flags and asoc_state. "af" (mandatory) is executed for all matching 6999 * assocs and "ef" (optional) is executed when the iterator completes. 7000 * "inpf" (optional) is executed for each new endpoint as it is being 7001 * iterated through. inpe (optional) is called when the inp completes 7002 * its way through all the stcbs. 7003 */ 7004 int 7005 sctp_initiate_iterator(inp_func inpf, 7006 asoc_func af, 7007 inp_func inpe, 7008 uint32_t pcb_state, 7009 uint32_t pcb_features, 7010 uint32_t asoc_state, 7011 void *argp, 7012 uint32_t argi, 7013 end_func ef, 7014 struct sctp_inpcb *s_inp, 7015 uint8_t chunk_output_off) 7016 { 7017 struct sctp_iterator *it = NULL; 7018 7019 if (af == NULL) { 7020 return (-1); 7021 } 7022 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7023 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7024 SCTP_BASE_VAR(sctp_pcb_initialized)); 7025 return (-1); 7026 } 7027 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7028 SCTP_M_ITER); 7029 if (it == NULL) { 7030 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7031 return (ENOMEM); 7032 } 7033 memset(it, 0, sizeof(*it)); 7034 it->function_assoc = af; 7035 it->function_inp = inpf; 7036 if (inpf) 7037 it->done_current_ep = 0; 7038 else 7039 it->done_current_ep = 1; 7040 it->function_atend = ef; 7041 it->pointer = argp; 7042 it->val = argi; 7043 it->pcb_flags = pcb_state; 7044 it->pcb_features = pcb_features; 7045 it->asoc_state = asoc_state; 7046 it->function_inp_end = inpe; 7047 it->no_chunk_output = chunk_output_off; 7048 it->vn = curvnet; 7049 if (s_inp) { 7050 /* Assume lock is held here */ 7051 it->inp = s_inp; 7052 SCTP_INP_INCR_REF(it->inp); 7053 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7054 } else { 7055 SCTP_INP_INFO_RLOCK(); 7056 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7057 if (it->inp) { 7058 SCTP_INP_INCR_REF(it->inp); 7059 } 7060 SCTP_INP_INFO_RUNLOCK(); 7061 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7062 7063 } 7064 SCTP_IPI_ITERATOR_WQ_LOCK(); 7065 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7066 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7067 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7068 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7069 SCTP_FREE(it, SCTP_M_ITER); 7070 return (-1); 7071 } 7072 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7073 if (sctp_it_ctl.iterator_running == 0) { 7074 sctp_wakeup_iterator(); 7075 } 7076 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7077 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7078 return (0); 7079 } 7080