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 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100 } 101 102 /*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147 struct sctp_vrf * 148 sctp_allocate_vrf(int vrf_id) 149 { 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163 #ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165 #endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181 #ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183 #endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192 } 193 194 195 struct sctp_ifn * 196 sctp_find_ifn(void *ifn, uint32_t ifn_index) 197 { 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215 } 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 234 void 235 sctp_free_vrf(struct sctp_vrf *vrf) 236 { 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247 } 248 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 264 void 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266 { 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273 } 274 275 276 void 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278 { 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287 } 288 289 290 static void 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292 { 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310 } 311 312 313 void 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316 { 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352 out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354 } 355 356 357 void 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360 { 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396 out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398 } 399 400 401 /*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406 static void 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408 { 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418 #ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422 #endif 423 #ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427 #endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 434 sctp_ifnp->registered_af = ifa_af; 435 } 436 } 437 438 439 /*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445 static void 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447 { 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453 #ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457 #endif 458 #ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462 #endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488 } 489 490 491 struct sctp_ifa * 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496 { 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505 #ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508 #endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532 #ifdef INVARIANTS 533 panic("No memory for IFN"); 534 #endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608 #ifdef INVARIANTS 609 panic("No memory for IFA"); 610 #endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623 #ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = &sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641 #endif 642 #ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = &sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661 #endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 bzero(wi, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 SCTP_WQ_ADDR_UNLOCK(); 714 715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 716 (struct sctp_inpcb *)NULL, 717 (struct sctp_tcb *)NULL, 718 (struct sctp_nets *)NULL); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724 } 725 726 void 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729 { 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739 #ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742 #endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789 #ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795 #endif 796 797 out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 bzero(wi, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 SCTP_WQ_ADDR_UNLOCK(); 826 827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 828 (struct sctp_inpcb *)NULL, 829 (struct sctp_tcb *)NULL, 830 (struct sctp_nets *)NULL); 831 } 832 return; 833 } 834 835 836 static int 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838 { 839 int loopback_scope; 840 841 #if defined(INET) 842 int ipv4_local_scope, ipv4_addr_legal; 843 844 #endif 845 #if defined(INET6) 846 int local_scope, site_scope, ipv6_addr_legal; 847 848 #endif 849 struct sctp_vrf *vrf; 850 struct sctp_ifn *sctp_ifn; 851 struct sctp_ifa *sctp_ifa; 852 853 loopback_scope = stcb->asoc.scope.loopback_scope; 854 #if defined(INET) 855 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 856 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 857 #endif 858 #if defined(INET6) 859 local_scope = stcb->asoc.scope.local_scope; 860 site_scope = stcb->asoc.scope.site_scope; 861 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 862 #endif 863 864 SCTP_IPI_ADDR_RLOCK(); 865 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 866 if (vrf == NULL) { 867 /* no vrf, no addresses */ 868 SCTP_IPI_ADDR_RUNLOCK(); 869 return (0); 870 } 871 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 872 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 873 if ((loopback_scope == 0) && 874 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 875 continue; 876 } 877 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 878 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 879 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 880 /* 881 * We allow pending addresses, where 882 * we have sent an asconf-add to be 883 * considered valid. 884 */ 885 continue; 886 } 887 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 888 continue; 889 } 890 switch (sctp_ifa->address.sa.sa_family) { 891 #ifdef INET 892 case AF_INET: 893 if (ipv4_addr_legal) { 894 struct sockaddr_in *sin, 895 *rsin; 896 897 sin = &sctp_ifa->address.sin; 898 rsin = (struct sockaddr_in *)to; 899 if ((ipv4_local_scope == 0) && 900 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 901 continue; 902 } 903 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 904 &sin->sin_addr) != 0) { 905 continue; 906 } 907 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 908 SCTP_IPI_ADDR_RUNLOCK(); 909 return (1); 910 } 911 } 912 break; 913 #endif 914 #ifdef INET6 915 case AF_INET6: 916 if (ipv6_addr_legal) { 917 struct sockaddr_in6 *sin6, 918 *rsin6; 919 920 sin6 = &sctp_ifa->address.sin6; 921 rsin6 = (struct sockaddr_in6 *)to; 922 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 923 &sin6->sin6_addr) != 0) { 924 continue; 925 } 926 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 927 if (local_scope == 0) 928 continue; 929 if (sin6->sin6_scope_id == 0) { 930 if (sa6_recoverscope(sin6) != 0) 931 continue; 932 } 933 } 934 if ((site_scope == 0) && 935 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 936 continue; 937 } 938 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 939 SCTP_IPI_ADDR_RUNLOCK(); 940 return (1); 941 } 942 } 943 break; 944 #endif 945 default: 946 /* TSNH */ 947 break; 948 } 949 } 950 } 951 } else { 952 struct sctp_laddr *laddr; 953 954 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 955 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 956 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 957 continue; 958 } 959 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 960 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 961 /* 962 * We allow pending addresses, where we have 963 * sent an asconf-add to be considered 964 * valid. 965 */ 966 continue; 967 } 968 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 969 continue; 970 } 971 switch (to->sa_family) { 972 #ifdef INET 973 case AF_INET: 974 { 975 struct sockaddr_in *sin, *rsin; 976 977 sin = &laddr->ifa->address.sin; 978 rsin = (struct sockaddr_in *)to; 979 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 980 SCTP_IPI_ADDR_RUNLOCK(); 981 return (1); 982 } 983 break; 984 } 985 #endif 986 #ifdef INET6 987 case AF_INET6: 988 { 989 struct sockaddr_in6 *sin6, *rsin6; 990 991 sin6 = &laddr->ifa->address.sin6; 992 rsin6 = (struct sockaddr_in6 *)to; 993 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (1); 996 } 997 break; 998 } 999 1000 #endif 1001 default: 1002 /* TSNH */ 1003 break; 1004 } 1005 1006 } 1007 } 1008 SCTP_IPI_ADDR_RUNLOCK(); 1009 return (0); 1010 } 1011 1012 1013 static struct sctp_tcb * 1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1015 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1016 { 1017 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1018 /* 1019 * If we support the TCP model, then we must now dig through to see 1020 * if we can find our endpoint in the list of tcp ep's. 1021 */ 1022 uint16_t lport, rport; 1023 struct sctppcbhead *ephead; 1024 struct sctp_inpcb *inp; 1025 struct sctp_laddr *laddr; 1026 struct sctp_tcb *stcb; 1027 struct sctp_nets *net; 1028 1029 if ((to == NULL) || (from == NULL)) { 1030 return (NULL); 1031 } 1032 switch (to->sa_family) { 1033 #ifdef INET 1034 case AF_INET: 1035 if (from->sa_family == AF_INET) { 1036 lport = ((struct sockaddr_in *)to)->sin_port; 1037 rport = ((struct sockaddr_in *)from)->sin_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042 #endif 1043 #ifdef INET6 1044 case AF_INET6: 1045 if (from->sa_family == AF_INET6) { 1046 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1047 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1048 } else { 1049 return (NULL); 1050 } 1051 break; 1052 #endif 1053 default: 1054 return (NULL); 1055 } 1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1057 /* 1058 * Ok now for each of the guys in this bucket we must look and see: 1059 * - Does the remote port match. - Does there single association's 1060 * addresses match this address (to). If so we update p_ep to point 1061 * to this ep and return the tcb from it. 1062 */ 1063 LIST_FOREACH(inp, ephead, sctp_hash) { 1064 SCTP_INP_RLOCK(inp); 1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 if (lport != inp->sctp_lport) { 1070 SCTP_INP_RUNLOCK(inp); 1071 continue; 1072 } 1073 switch (to->sa_family) { 1074 #ifdef INET 1075 case AF_INET: 1076 { 1077 struct sockaddr_in *sin; 1078 1079 sin = (struct sockaddr_in *)to; 1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1081 &sin->sin_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 #ifdef INET6 1089 case AF_INET6: 1090 { 1091 struct sockaddr_in6 *sin6; 1092 1093 sin6 = (struct sockaddr_in6 *)to; 1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1095 &sin6->sin6_addr) != 0) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 break; 1100 } 1101 #endif 1102 default: 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 if (inp->def_vrf_id != vrf_id) { 1107 SCTP_INP_RUNLOCK(inp); 1108 continue; 1109 } 1110 /* check to see if the ep has one of the addresses */ 1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1112 /* We are NOT bound all, so look further */ 1113 int match = 0; 1114 1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1116 1117 if (laddr->ifa == NULL) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1119 continue; 1120 } 1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1123 continue; 1124 } 1125 if (laddr->ifa->address.sa.sa_family == 1126 to->sa_family) { 1127 /* see if it matches */ 1128 #ifdef INET 1129 if (from->sa_family == AF_INET) { 1130 struct sockaddr_in *intf_addr, 1131 *sin; 1132 1133 intf_addr = &laddr->ifa->address.sin; 1134 sin = (struct sockaddr_in *)to; 1135 if (sin->sin_addr.s_addr == 1136 intf_addr->sin_addr.s_addr) { 1137 match = 1; 1138 break; 1139 } 1140 } 1141 #endif 1142 #ifdef INET6 1143 if (from->sa_family == AF_INET6) { 1144 struct sockaddr_in6 *intf_addr6; 1145 struct sockaddr_in6 *sin6; 1146 1147 sin6 = (struct sockaddr_in6 *) 1148 to; 1149 intf_addr6 = &laddr->ifa->address.sin6; 1150 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1152 intf_addr6)) { 1153 match = 1; 1154 break; 1155 } 1156 } 1157 #endif 1158 } 1159 } 1160 if (match == 0) { 1161 /* This endpoint does not have this address */ 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 } 1166 /* 1167 * Ok if we hit here the ep has the address, does it hold 1168 * the tcb? 1169 */ 1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1171 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1172 if (stcb == NULL) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 SCTP_TCB_LOCK(stcb); 1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->rport != rport) { 1183 /* remote port does not match. */ 1184 SCTP_TCB_UNLOCK(stcb); 1185 SCTP_INP_RUNLOCK(inp); 1186 continue; 1187 } 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 continue; 1197 } 1198 /* Does this TCB have a matching address? */ 1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200 1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1202 /* not the same family, can't be a match */ 1203 continue; 1204 } 1205 switch (from->sa_family) { 1206 #ifdef INET 1207 case AF_INET: 1208 { 1209 struct sockaddr_in *sin, *rsin; 1210 1211 sin = (struct sockaddr_in *)&net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)from; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 /* 1220 * Update the endpoint 1221 * pointer 1222 */ 1223 *inp_p = inp; 1224 SCTP_INP_RUNLOCK(inp); 1225 return (stcb); 1226 } 1227 break; 1228 } 1229 #endif 1230 #ifdef INET6 1231 case AF_INET6: 1232 { 1233 struct sockaddr_in6 *sin6, *rsin6; 1234 1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1236 rsin6 = (struct sockaddr_in6 *)from; 1237 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1238 rsin6)) { 1239 /* found it */ 1240 if (netp != NULL) { 1241 *netp = net; 1242 } 1243 /* 1244 * Update the endpoint 1245 * pointer 1246 */ 1247 *inp_p = inp; 1248 SCTP_INP_RUNLOCK(inp); 1249 return (stcb); 1250 } 1251 break; 1252 } 1253 #endif 1254 default: 1255 /* TSNH */ 1256 break; 1257 } 1258 } 1259 SCTP_TCB_UNLOCK(stcb); 1260 SCTP_INP_RUNLOCK(inp); 1261 } 1262 return (NULL); 1263 } 1264 1265 1266 /* 1267 * rules for use 1268 * 1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1272 * NULL. 1273 */ 1274 1275 struct sctp_tcb * 1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1278 { 1279 struct sctpasochead *head; 1280 struct sctp_inpcb *inp; 1281 struct sctp_tcb *stcb = NULL; 1282 struct sctp_nets *net; 1283 uint16_t rport; 1284 1285 inp = *inp_p; 1286 switch (remote->sa_family) { 1287 #ifdef INET 1288 case AF_INET: 1289 rport = (((struct sockaddr_in *)remote)->sin_port); 1290 break; 1291 #endif 1292 #ifdef INET6 1293 case AF_INET6: 1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1295 break; 1296 #endif 1297 default: 1298 return (NULL); 1299 } 1300 if (locked_tcb) { 1301 /* 1302 * UN-lock so we can do proper locking here this occurs when 1303 * called from load_addresses_from_init. 1304 */ 1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1306 SCTP_TCB_UNLOCK(locked_tcb); 1307 } 1308 SCTP_INP_INFO_RLOCK(); 1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1311 /*- 1312 * Now either this guy is our listener or it's the 1313 * connector. If it is the one that issued the connect, then 1314 * it's only chance is to be the first TCB in the list. If 1315 * it is the acceptor, then do the special_lookup to hash 1316 * and find the real inp. 1317 */ 1318 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1319 /* to is peer addr, from is my addr */ 1320 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1321 netp, inp->def_vrf_id); 1322 if ((stcb != NULL) && (locked_tcb == NULL)) { 1323 /* we have a locked tcb, lower refcount */ 1324 SCTP_INP_DECR_REF(inp); 1325 } 1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1328 SCTP_TCB_LOCK(locked_tcb); 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1331 } 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } else { 1335 SCTP_INP_WLOCK(inp); 1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1337 goto null_return; 1338 } 1339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1340 if (stcb == NULL) { 1341 goto null_return; 1342 } 1343 SCTP_TCB_LOCK(stcb); 1344 1345 if (stcb->rport != rport) { 1346 /* remote port does not match. */ 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1355 SCTP_TCB_UNLOCK(stcb); 1356 goto null_return; 1357 } 1358 /* now look at the list of remote addresses */ 1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1360 #ifdef INVARIANTS 1361 if (net == (TAILQ_NEXT(net, sctp_next))) { 1362 panic("Corrupt net list"); 1363 } 1364 #endif 1365 if (net->ro._l_addr.sa.sa_family != 1366 remote->sa_family) { 1367 /* not the same family */ 1368 continue; 1369 } 1370 switch (remote->sa_family) { 1371 #ifdef INET 1372 case AF_INET: 1373 { 1374 struct sockaddr_in *sin, 1375 *rsin; 1376 1377 sin = (struct sockaddr_in *) 1378 &net->ro._l_addr; 1379 rsin = (struct sockaddr_in *)remote; 1380 if (sin->sin_addr.s_addr == 1381 rsin->sin_addr.s_addr) { 1382 /* found it */ 1383 if (netp != NULL) { 1384 *netp = net; 1385 } 1386 if (locked_tcb == NULL) { 1387 SCTP_INP_DECR_REF(inp); 1388 } else if (locked_tcb != stcb) { 1389 SCTP_TCB_LOCK(locked_tcb); 1390 } 1391 if (locked_tcb) { 1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1393 } 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400 #endif 1401 #ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429 #endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1445 if (stcb->rport != rport) { 1446 /* remote port does not match */ 1447 continue; 1448 } 1449 SCTP_TCB_LOCK(stcb); 1450 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1455 SCTP_TCB_UNLOCK(stcb); 1456 continue; 1457 } 1458 /* now look at the list of remote addresses */ 1459 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1460 #ifdef INVARIANTS 1461 if (net == (TAILQ_NEXT(net, sctp_next))) { 1462 panic("Corrupt net list"); 1463 } 1464 #endif 1465 if (net->ro._l_addr.sa.sa_family != 1466 remote->sa_family) { 1467 /* not the same family */ 1468 continue; 1469 } 1470 switch (remote->sa_family) { 1471 #ifdef INET 1472 case AF_INET: 1473 { 1474 struct sockaddr_in *sin, 1475 *rsin; 1476 1477 sin = (struct sockaddr_in *) 1478 &net->ro._l_addr; 1479 rsin = (struct sockaddr_in *)remote; 1480 if (sin->sin_addr.s_addr == 1481 rsin->sin_addr.s_addr) { 1482 /* found it */ 1483 if (netp != NULL) { 1484 *netp = net; 1485 } 1486 if (locked_tcb == NULL) { 1487 SCTP_INP_DECR_REF(inp); 1488 } else if (locked_tcb != stcb) { 1489 SCTP_TCB_LOCK(locked_tcb); 1490 } 1491 if (locked_tcb) { 1492 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1493 } 1494 SCTP_INP_WUNLOCK(inp); 1495 SCTP_INP_INFO_RUNLOCK(); 1496 return (stcb); 1497 } 1498 break; 1499 } 1500 #endif 1501 #ifdef INET6 1502 case AF_INET6: 1503 { 1504 struct sockaddr_in6 *sin6, 1505 *rsin6; 1506 1507 sin6 = (struct sockaddr_in6 *) 1508 &net->ro._l_addr; 1509 rsin6 = (struct sockaddr_in6 *)remote; 1510 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1511 rsin6)) { 1512 /* found it */ 1513 if (netp != NULL) { 1514 *netp = net; 1515 } 1516 if (locked_tcb == NULL) { 1517 SCTP_INP_DECR_REF(inp); 1518 } else if (locked_tcb != stcb) { 1519 SCTP_TCB_LOCK(locked_tcb); 1520 } 1521 if (locked_tcb) { 1522 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1523 } 1524 SCTP_INP_WUNLOCK(inp); 1525 SCTP_INP_INFO_RUNLOCK(); 1526 return (stcb); 1527 } 1528 break; 1529 } 1530 #endif 1531 default: 1532 /* TSNH */ 1533 break; 1534 } 1535 } 1536 SCTP_TCB_UNLOCK(stcb); 1537 } 1538 } 1539 null_return: 1540 /* clean up for returning null */ 1541 if (locked_tcb) { 1542 SCTP_TCB_LOCK(locked_tcb); 1543 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1544 } 1545 SCTP_INP_WUNLOCK(inp); 1546 SCTP_INP_INFO_RUNLOCK(); 1547 /* not found */ 1548 return (NULL); 1549 } 1550 1551 1552 /* 1553 * Find an association for a specific endpoint using the association id given 1554 * out in the COMM_UP notification 1555 */ 1556 struct sctp_tcb * 1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1558 { 1559 /* 1560 * Use my the assoc_id to find a endpoint 1561 */ 1562 struct sctpasochead *head; 1563 struct sctp_tcb *stcb; 1564 uint32_t id; 1565 1566 if (inp == NULL) { 1567 SCTP_PRINTF("TSNH ep_associd\n"); 1568 return (NULL); 1569 } 1570 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1571 SCTP_PRINTF("TSNH ep_associd0\n"); 1572 return (NULL); 1573 } 1574 id = (uint32_t) asoc_id; 1575 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1576 if (head == NULL) { 1577 /* invalid id TSNH */ 1578 SCTP_PRINTF("TSNH ep_associd1\n"); 1579 return (NULL); 1580 } 1581 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1582 if (stcb->asoc.assoc_id == id) { 1583 if (inp != stcb->sctp_ep) { 1584 /* 1585 * some other guy has the same id active (id 1586 * collision ??). 1587 */ 1588 SCTP_PRINTF("TSNH ep_associd2\n"); 1589 continue; 1590 } 1591 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1592 continue; 1593 } 1594 if (want_lock) { 1595 SCTP_TCB_LOCK(stcb); 1596 } 1597 return (stcb); 1598 } 1599 } 1600 return (NULL); 1601 } 1602 1603 1604 struct sctp_tcb * 1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1606 { 1607 struct sctp_tcb *stcb; 1608 1609 SCTP_INP_RLOCK(inp); 1610 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1611 SCTP_INP_RUNLOCK(inp); 1612 return (stcb); 1613 } 1614 1615 1616 /* 1617 * Endpoint probe expects that the INP_INFO is locked. 1618 */ 1619 static struct sctp_inpcb * 1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1621 uint16_t lport, uint32_t vrf_id) 1622 { 1623 struct sctp_inpcb *inp; 1624 struct sctp_laddr *laddr; 1625 1626 #ifdef INET 1627 struct sockaddr_in *sin; 1628 1629 #endif 1630 #ifdef INET6 1631 struct sockaddr_in6 *sin6; 1632 struct sockaddr_in6 *intf_addr6; 1633 1634 #endif 1635 int fnd; 1636 1637 #ifdef INET 1638 sin = NULL; 1639 #endif 1640 #ifdef INET6 1641 sin6 = NULL; 1642 #endif 1643 switch (nam->sa_family) { 1644 #ifdef INET 1645 case AF_INET: 1646 sin = (struct sockaddr_in *)nam; 1647 break; 1648 #endif 1649 #ifdef INET6 1650 case AF_INET6: 1651 sin6 = (struct sockaddr_in6 *)nam; 1652 break; 1653 #endif 1654 default: 1655 /* unsupported family */ 1656 return (NULL); 1657 } 1658 1659 if (head == NULL) 1660 return (NULL); 1661 1662 LIST_FOREACH(inp, head, sctp_hash) { 1663 SCTP_INP_RLOCK(inp); 1664 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1665 SCTP_INP_RUNLOCK(inp); 1666 continue; 1667 } 1668 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1669 (inp->sctp_lport == lport)) { 1670 /* got it */ 1671 switch (nam->sa_family) { 1672 #ifdef INET 1673 case AF_INET: 1674 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1675 SCTP_IPV6_V6ONLY(inp)) { 1676 /* 1677 * IPv4 on a IPv6 socket with ONLY 1678 * IPv6 set 1679 */ 1680 SCTP_INP_RUNLOCK(inp); 1681 continue; 1682 } 1683 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1684 &sin->sin_addr) != 0) { 1685 SCTP_INP_RUNLOCK(inp); 1686 continue; 1687 } 1688 break; 1689 #endif 1690 #ifdef INET6 1691 case AF_INET6: 1692 /* 1693 * A V6 address and the endpoint is NOT 1694 * bound V6 1695 */ 1696 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1697 SCTP_INP_RUNLOCK(inp); 1698 continue; 1699 } 1700 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1701 &sin6->sin6_addr) != 0) { 1702 SCTP_INP_RUNLOCK(inp); 1703 continue; 1704 } 1705 break; 1706 #endif 1707 default: 1708 break; 1709 } 1710 /* does a VRF id match? */ 1711 fnd = 0; 1712 if (inp->def_vrf_id == vrf_id) 1713 fnd = 1; 1714 1715 SCTP_INP_RUNLOCK(inp); 1716 if (!fnd) 1717 continue; 1718 return (inp); 1719 } 1720 SCTP_INP_RUNLOCK(inp); 1721 } 1722 switch (nam->sa_family) { 1723 #ifdef INET 1724 case AF_INET: 1725 if (sin->sin_addr.s_addr == INADDR_ANY) { 1726 /* Can't hunt for one that has no address specified */ 1727 return (NULL); 1728 } 1729 break; 1730 #endif 1731 #ifdef INET6 1732 case AF_INET6: 1733 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1734 /* Can't hunt for one that has no address specified */ 1735 return (NULL); 1736 } 1737 break; 1738 #endif 1739 default: 1740 break; 1741 } 1742 /* 1743 * ok, not bound to all so see if we can find a EP bound to this 1744 * address. 1745 */ 1746 LIST_FOREACH(inp, head, sctp_hash) { 1747 SCTP_INP_RLOCK(inp); 1748 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1749 SCTP_INP_RUNLOCK(inp); 1750 continue; 1751 } 1752 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1753 SCTP_INP_RUNLOCK(inp); 1754 continue; 1755 } 1756 /* 1757 * Ok this could be a likely candidate, look at all of its 1758 * addresses 1759 */ 1760 if (inp->sctp_lport != lport) { 1761 SCTP_INP_RUNLOCK(inp); 1762 continue; 1763 } 1764 /* does a VRF id match? */ 1765 fnd = 0; 1766 if (inp->def_vrf_id == vrf_id) 1767 fnd = 1; 1768 1769 if (!fnd) { 1770 SCTP_INP_RUNLOCK(inp); 1771 continue; 1772 } 1773 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1774 if (laddr->ifa == NULL) { 1775 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1776 __func__); 1777 continue; 1778 } 1779 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1780 (void *)laddr->ifa); 1781 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1783 continue; 1784 } 1785 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1786 /* possible, see if it matches */ 1787 switch (nam->sa_family) { 1788 #ifdef INET 1789 case AF_INET: 1790 if (sin->sin_addr.s_addr == 1791 laddr->ifa->address.sin.sin_addr.s_addr) { 1792 SCTP_INP_RUNLOCK(inp); 1793 return (inp); 1794 } 1795 break; 1796 #endif 1797 #ifdef INET6 1798 case AF_INET6: 1799 intf_addr6 = &laddr->ifa->address.sin6; 1800 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1801 intf_addr6)) { 1802 SCTP_INP_RUNLOCK(inp); 1803 return (inp); 1804 } 1805 break; 1806 #endif 1807 } 1808 } 1809 } 1810 SCTP_INP_RUNLOCK(inp); 1811 } 1812 return (NULL); 1813 } 1814 1815 1816 static struct sctp_inpcb * 1817 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1818 { 1819 struct sctppcbhead *head; 1820 struct sctp_inpcb *t_inp; 1821 int fnd; 1822 1823 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1824 SCTP_BASE_INFO(hashmark))]; 1825 LIST_FOREACH(t_inp, head, sctp_hash) { 1826 if (t_inp->sctp_lport != lport) { 1827 continue; 1828 } 1829 /* is it in the VRF in question */ 1830 fnd = 0; 1831 if (t_inp->def_vrf_id == vrf_id) 1832 fnd = 1; 1833 if (!fnd) 1834 continue; 1835 1836 /* This one is in use. */ 1837 /* check the v6/v4 binding issue */ 1838 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1839 SCTP_IPV6_V6ONLY(t_inp)) { 1840 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1841 /* collision in V6 space */ 1842 return (t_inp); 1843 } else { 1844 /* inp is BOUND_V4 no conflict */ 1845 continue; 1846 } 1847 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1848 /* t_inp is bound v4 and v6, conflict always */ 1849 return (t_inp); 1850 } else { 1851 /* t_inp is bound only V4 */ 1852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1853 SCTP_IPV6_V6ONLY(inp)) { 1854 /* no conflict */ 1855 continue; 1856 } 1857 /* else fall through to conflict */ 1858 } 1859 return (t_inp); 1860 } 1861 return (NULL); 1862 } 1863 1864 1865 int 1866 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1867 { 1868 /* For 1-2-1 with port reuse */ 1869 struct sctppcbhead *head; 1870 struct sctp_inpcb *tinp, *ninp; 1871 1872 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1873 /* only works with port reuse on */ 1874 return (-1); 1875 } 1876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1877 return (0); 1878 } 1879 SCTP_INP_RUNLOCK(inp); 1880 SCTP_INP_INFO_WLOCK(); 1881 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1882 SCTP_BASE_INFO(hashmark))]; 1883 /* Kick out all non-listeners to the TCP hash */ 1884 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1885 if (tinp->sctp_lport != inp->sctp_lport) { 1886 continue; 1887 } 1888 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1889 continue; 1890 } 1891 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1892 continue; 1893 } 1894 if (tinp->sctp_socket->so_qlimit) { 1895 continue; 1896 } 1897 SCTP_INP_WLOCK(tinp); 1898 LIST_REMOVE(tinp, sctp_hash); 1899 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1900 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1901 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1902 SCTP_INP_WUNLOCK(tinp); 1903 } 1904 SCTP_INP_WLOCK(inp); 1905 /* Pull from where he was */ 1906 LIST_REMOVE(inp, sctp_hash); 1907 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1908 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1909 LIST_INSERT_HEAD(head, inp, sctp_hash); 1910 SCTP_INP_WUNLOCK(inp); 1911 SCTP_INP_RLOCK(inp); 1912 SCTP_INP_INFO_WUNLOCK(); 1913 return (0); 1914 } 1915 1916 1917 struct sctp_inpcb * 1918 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1919 uint32_t vrf_id) 1920 { 1921 /* 1922 * First we check the hash table to see if someone has this port 1923 * bound with just the port. 1924 */ 1925 struct sctp_inpcb *inp; 1926 struct sctppcbhead *head; 1927 int lport; 1928 unsigned int i; 1929 1930 #ifdef INET 1931 struct sockaddr_in *sin; 1932 1933 #endif 1934 #ifdef INET6 1935 struct sockaddr_in6 *sin6; 1936 1937 #endif 1938 1939 switch (nam->sa_family) { 1940 #ifdef INET 1941 case AF_INET: 1942 sin = (struct sockaddr_in *)nam; 1943 lport = sin->sin_port; 1944 break; 1945 #endif 1946 #ifdef INET6 1947 case AF_INET6: 1948 sin6 = (struct sockaddr_in6 *)nam; 1949 lport = sin6->sin6_port; 1950 break; 1951 #endif 1952 default: 1953 return (NULL); 1954 } 1955 /* 1956 * I could cheat here and just cast to one of the types but we will 1957 * do it right. It also provides the check against an Unsupported 1958 * type too. 1959 */ 1960 /* Find the head of the ALLADDR chain */ 1961 if (have_lock == 0) { 1962 SCTP_INP_INFO_RLOCK(); 1963 } 1964 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1965 SCTP_BASE_INFO(hashmark))]; 1966 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1967 1968 /* 1969 * If the TCP model exists it could be that the main listening 1970 * endpoint is gone but there still exists a connected socket for 1971 * this guy. If so we can return the first one that we find. This 1972 * may NOT be the correct one so the caller should be wary on the 1973 * returned INP. Currently the only caller that sets find_tcp_pool 1974 * is in bindx where we are verifying that a user CAN bind the 1975 * address. He either has bound it already, or someone else has, or 1976 * its open to bind, so this is good enough. 1977 */ 1978 if (inp == NULL && find_tcp_pool) { 1979 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1980 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1981 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1982 if (inp) { 1983 break; 1984 } 1985 } 1986 } 1987 if (inp) { 1988 SCTP_INP_INCR_REF(inp); 1989 } 1990 if (have_lock == 0) { 1991 SCTP_INP_INFO_RUNLOCK(); 1992 } 1993 return (inp); 1994 } 1995 1996 1997 /* 1998 * Find an association for an endpoint with the pointer to whom you want to 1999 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2000 * need to change the *to to some other struct like a mbuf... 2001 */ 2002 struct sctp_tcb * 2003 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2004 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2005 uint32_t vrf_id) 2006 { 2007 struct sctp_inpcb *inp = NULL; 2008 struct sctp_tcb *stcb; 2009 2010 SCTP_INP_INFO_RLOCK(); 2011 if (find_tcp_pool) { 2012 if (inp_p != NULL) { 2013 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2014 vrf_id); 2015 } else { 2016 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2017 vrf_id); 2018 } 2019 if (stcb != NULL) { 2020 SCTP_INP_INFO_RUNLOCK(); 2021 return (stcb); 2022 } 2023 } 2024 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2025 if (inp_p != NULL) { 2026 *inp_p = inp; 2027 } 2028 SCTP_INP_INFO_RUNLOCK(); 2029 if (inp == NULL) { 2030 return (NULL); 2031 } 2032 /* 2033 * ok, we have an endpoint, now lets find the assoc for it (if any) 2034 * we now place the source address or from in the to of the find 2035 * endpoint call. Since in reality this chain is used from the 2036 * inbound packet side. 2037 */ 2038 if (inp_p != NULL) { 2039 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2040 NULL); 2041 } else { 2042 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2043 NULL); 2044 } 2045 return (stcb); 2046 } 2047 2048 2049 /* 2050 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2051 * find all addresses that the sender has specified in any address list. Each 2052 * address will be used to lookup the TCB and see if one exits. 2053 */ 2054 static struct sctp_tcb * 2055 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2056 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2057 struct sockaddr *dst) 2058 { 2059 struct sctp_paramhdr *phdr, parm_buf; 2060 2061 #if defined(INET) || defined(INET6) 2062 struct sctp_tcb *stcb; 2063 uint16_t ptype; 2064 2065 #endif 2066 uint16_t plen; 2067 2068 #ifdef INET 2069 struct sockaddr_in sin4; 2070 2071 #endif 2072 #ifdef INET6 2073 struct sockaddr_in6 sin6; 2074 2075 #endif 2076 2077 #ifdef INET 2078 memset(&sin4, 0, sizeof(sin4)); 2079 sin4.sin_len = sizeof(sin4); 2080 sin4.sin_family = AF_INET; 2081 sin4.sin_port = sh->src_port; 2082 #endif 2083 #ifdef INET6 2084 memset(&sin6, 0, sizeof(sin6)); 2085 sin6.sin6_len = sizeof(sin6); 2086 sin6.sin6_family = AF_INET6; 2087 sin6.sin6_port = sh->src_port; 2088 #endif 2089 2090 offset += sizeof(struct sctp_init_chunk); 2091 2092 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2093 while (phdr != NULL) { 2094 /* now we must see if we want the parameter */ 2095 #if defined(INET) || defined(INET6) 2096 ptype = ntohs(phdr->param_type); 2097 #endif 2098 plen = ntohs(phdr->param_length); 2099 if (plen == 0) { 2100 break; 2101 } 2102 #ifdef INET 2103 if (ptype == SCTP_IPV4_ADDRESS && 2104 plen == sizeof(struct sctp_ipv4addr_param)) { 2105 /* Get the rest of the address */ 2106 struct sctp_ipv4addr_param ip4_parm, *p4; 2107 2108 phdr = sctp_get_next_param(m, offset, 2109 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2110 if (phdr == NULL) { 2111 return (NULL); 2112 } 2113 p4 = (struct sctp_ipv4addr_param *)phdr; 2114 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2115 /* look it up */ 2116 stcb = sctp_findassociation_ep_addr(inp_p, 2117 (struct sockaddr *)&sin4, netp, dst, NULL); 2118 if (stcb != NULL) { 2119 return (stcb); 2120 } 2121 } 2122 #endif 2123 #ifdef INET6 2124 if (ptype == SCTP_IPV6_ADDRESS && 2125 plen == sizeof(struct sctp_ipv6addr_param)) { 2126 /* Get the rest of the address */ 2127 struct sctp_ipv6addr_param ip6_parm, *p6; 2128 2129 phdr = sctp_get_next_param(m, offset, 2130 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2131 if (phdr == NULL) { 2132 return (NULL); 2133 } 2134 p6 = (struct sctp_ipv6addr_param *)phdr; 2135 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2136 /* look it up */ 2137 stcb = sctp_findassociation_ep_addr(inp_p, 2138 (struct sockaddr *)&sin6, netp, dst, NULL); 2139 if (stcb != NULL) { 2140 return (stcb); 2141 } 2142 } 2143 #endif 2144 offset += SCTP_SIZE32(plen); 2145 phdr = sctp_get_next_param(m, offset, &parm_buf, 2146 sizeof(parm_buf)); 2147 } 2148 return (NULL); 2149 } 2150 2151 static struct sctp_tcb * 2152 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2153 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2154 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2155 { 2156 /* 2157 * Use my vtag to hash. If we find it we then verify the source addr 2158 * is in the assoc. If all goes well we save a bit on rec of a 2159 * packet. 2160 */ 2161 struct sctpasochead *head; 2162 struct sctp_nets *net; 2163 struct sctp_tcb *stcb; 2164 2165 SCTP_INP_INFO_RLOCK(); 2166 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2167 SCTP_BASE_INFO(hashasocmark))]; 2168 LIST_FOREACH(stcb, head, sctp_asocs) { 2169 SCTP_INP_RLOCK(stcb->sctp_ep); 2170 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2171 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2172 continue; 2173 } 2174 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2175 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2176 continue; 2177 } 2178 SCTP_TCB_LOCK(stcb); 2179 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2180 if (stcb->asoc.my_vtag == vtag) { 2181 /* candidate */ 2182 if (stcb->rport != rport) { 2183 SCTP_TCB_UNLOCK(stcb); 2184 continue; 2185 } 2186 if (stcb->sctp_ep->sctp_lport != lport) { 2187 SCTP_TCB_UNLOCK(stcb); 2188 continue; 2189 } 2190 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2191 SCTP_TCB_UNLOCK(stcb); 2192 continue; 2193 } 2194 /* RRS:Need toaddr check here */ 2195 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2196 /* Endpoint does not own this address */ 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 if (remote_tag) { 2201 /* 2202 * If we have both vtags that's all we match 2203 * on 2204 */ 2205 if (stcb->asoc.peer_vtag == remote_tag) { 2206 /* 2207 * If both tags match we consider it 2208 * conclusive and check NO 2209 * source/destination addresses 2210 */ 2211 goto conclusive; 2212 } 2213 } 2214 if (skip_src_check) { 2215 conclusive: 2216 if (from) { 2217 *netp = sctp_findnet(stcb, from); 2218 } else { 2219 *netp = NULL; /* unknown */ 2220 } 2221 if (inp_p) 2222 *inp_p = stcb->sctp_ep; 2223 SCTP_INP_INFO_RUNLOCK(); 2224 return (stcb); 2225 } 2226 net = sctp_findnet(stcb, from); 2227 if (net) { 2228 /* yep its him. */ 2229 *netp = net; 2230 SCTP_STAT_INCR(sctps_vtagexpress); 2231 *inp_p = stcb->sctp_ep; 2232 SCTP_INP_INFO_RUNLOCK(); 2233 return (stcb); 2234 } else { 2235 /* 2236 * not him, this should only happen in rare 2237 * cases so I peg it. 2238 */ 2239 SCTP_STAT_INCR(sctps_vtagbogus); 2240 } 2241 } 2242 SCTP_TCB_UNLOCK(stcb); 2243 } 2244 SCTP_INP_INFO_RUNLOCK(); 2245 return (NULL); 2246 } 2247 2248 2249 /* 2250 * Find an association with the pointer to the inbound IP packet. This can be 2251 * a IPv4 or IPv6 packet. 2252 */ 2253 struct sctp_tcb * 2254 sctp_findassociation_addr(struct mbuf *m, int offset, 2255 struct sockaddr *src, struct sockaddr *dst, 2256 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2257 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2258 { 2259 struct sctp_tcb *stcb; 2260 struct sctp_inpcb *inp; 2261 2262 if (sh->v_tag) { 2263 /* we only go down this path if vtag is non-zero */ 2264 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2265 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2266 if (stcb) { 2267 return (stcb); 2268 } 2269 } 2270 if (inp_p) { 2271 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2272 1, vrf_id); 2273 inp = *inp_p; 2274 } else { 2275 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2276 1, vrf_id); 2277 } 2278 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2279 if (stcb == NULL && inp) { 2280 /* Found a EP but not this address */ 2281 if ((ch->chunk_type == SCTP_INITIATION) || 2282 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2283 /*- 2284 * special hook, we do NOT return linp or an 2285 * association that is linked to an existing 2286 * association that is under the TCP pool (i.e. no 2287 * listener exists). The endpoint finding routine 2288 * will always find a listener before examining the 2289 * TCP pool. 2290 */ 2291 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2292 if (inp_p) { 2293 *inp_p = NULL; 2294 } 2295 return (NULL); 2296 } 2297 stcb = sctp_findassociation_special_addr(m, 2298 offset, sh, &inp, netp, dst); 2299 if (inp_p != NULL) { 2300 *inp_p = inp; 2301 } 2302 } 2303 } 2304 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2305 return (stcb); 2306 } 2307 2308 /* 2309 * lookup an association by an ASCONF lookup address. 2310 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2311 */ 2312 struct sctp_tcb * 2313 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2314 struct sockaddr *dst, struct sctphdr *sh, 2315 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2316 { 2317 struct sctp_tcb *stcb; 2318 union sctp_sockstore remote_store; 2319 struct sctp_paramhdr parm_buf, *phdr; 2320 int ptype; 2321 int zero_address = 0; 2322 2323 #ifdef INET 2324 struct sockaddr_in *sin; 2325 2326 #endif 2327 #ifdef INET6 2328 struct sockaddr_in6 *sin6; 2329 2330 #endif 2331 2332 memset(&remote_store, 0, sizeof(remote_store)); 2333 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2334 &parm_buf, sizeof(struct sctp_paramhdr)); 2335 if (phdr == NULL) { 2336 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2337 __func__); 2338 return NULL; 2339 } 2340 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2341 /* get the correlation address */ 2342 switch (ptype) { 2343 #ifdef INET6 2344 case SCTP_IPV6_ADDRESS: 2345 { 2346 /* ipv6 address param */ 2347 struct sctp_ipv6addr_param *p6, p6_buf; 2348 2349 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2350 return NULL; 2351 } 2352 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2353 offset + sizeof(struct sctp_asconf_chunk), 2354 &p6_buf.ph, sizeof(*p6)); 2355 if (p6 == NULL) { 2356 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2357 __func__); 2358 return (NULL); 2359 } 2360 sin6 = &remote_store.sin6; 2361 sin6->sin6_family = AF_INET6; 2362 sin6->sin6_len = sizeof(*sin6); 2363 sin6->sin6_port = sh->src_port; 2364 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2365 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2366 zero_address = 1; 2367 break; 2368 } 2369 #endif 2370 #ifdef INET 2371 case SCTP_IPV4_ADDRESS: 2372 { 2373 /* ipv4 address param */ 2374 struct sctp_ipv4addr_param *p4, p4_buf; 2375 2376 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2377 return NULL; 2378 } 2379 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2380 offset + sizeof(struct sctp_asconf_chunk), 2381 &p4_buf.ph, sizeof(*p4)); 2382 if (p4 == NULL) { 2383 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2384 __func__); 2385 return (NULL); 2386 } 2387 sin = &remote_store.sin; 2388 sin->sin_family = AF_INET; 2389 sin->sin_len = sizeof(*sin); 2390 sin->sin_port = sh->src_port; 2391 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2392 if (sin->sin_addr.s_addr == INADDR_ANY) 2393 zero_address = 1; 2394 break; 2395 } 2396 #endif 2397 default: 2398 /* invalid address param type */ 2399 return NULL; 2400 } 2401 2402 if (zero_address) { 2403 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2404 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2405 if (stcb != NULL) { 2406 SCTP_INP_DECR_REF(*inp_p); 2407 } 2408 } else { 2409 stcb = sctp_findassociation_ep_addr(inp_p, 2410 &remote_store.sa, netp, 2411 dst, NULL); 2412 } 2413 return (stcb); 2414 } 2415 2416 2417 /* 2418 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2419 * addresses. This way if we don't get a bind we by default pick a ephemeral 2420 * port with all addresses bound. 2421 */ 2422 int 2423 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2424 { 2425 /* 2426 * we get called when a new endpoint starts up. We need to allocate 2427 * the sctp_inpcb structure from the zone and init it. Mark it as 2428 * unbound and find a port that we can use as an ephemeral with 2429 * INADDR_ANY. If the user binds later no problem we can then add in 2430 * the specific addresses. And setup the default parameters for the 2431 * EP. 2432 */ 2433 int i, error; 2434 struct sctp_inpcb *inp; 2435 struct sctp_pcb *m; 2436 struct timeval time; 2437 sctp_sharedkey_t *null_key; 2438 2439 error = 0; 2440 2441 SCTP_INP_INFO_WLOCK(); 2442 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2443 if (inp == NULL) { 2444 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2445 SCTP_INP_INFO_WUNLOCK(); 2446 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2447 return (ENOBUFS); 2448 } 2449 /* zap it */ 2450 bzero(inp, sizeof(*inp)); 2451 2452 /* bump generations */ 2453 /* setup socket pointers */ 2454 inp->sctp_socket = so; 2455 inp->ip_inp.inp.inp_socket = so; 2456 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2457 #ifdef INET6 2458 if (INP_SOCKAF(so) == AF_INET6) { 2459 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2460 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2461 } 2462 if (MODULE_GLOBAL(ip6_v6only)) { 2463 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2464 } 2465 } 2466 #endif 2467 inp->sctp_associd_counter = 1; 2468 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2469 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2470 inp->max_cwnd = 0; 2471 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2472 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2473 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2474 inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable); 2475 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2476 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2477 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2478 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2479 inp->fibnum = so->so_fibnum; 2480 /* init the small hash table we use to track asocid <-> tcb */ 2481 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2482 if (inp->sctp_asocidhash == NULL) { 2483 crfree(inp->ip_inp.inp.inp_cred); 2484 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2485 SCTP_INP_INFO_WUNLOCK(); 2486 return (ENOBUFS); 2487 } 2488 #ifdef IPSEC 2489 error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp); 2490 if (error != 0) { 2491 crfree(inp->ip_inp.inp.inp_cred); 2492 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2493 SCTP_INP_INFO_WUNLOCK(); 2494 return error; 2495 } 2496 #endif /* IPSEC */ 2497 SCTP_INCR_EP_COUNT(); 2498 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2499 SCTP_INP_INFO_WUNLOCK(); 2500 2501 so->so_pcb = (caddr_t)inp; 2502 2503 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2504 /* UDP style socket */ 2505 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2506 SCTP_PCB_FLAGS_UNBOUND); 2507 /* Be sure it is NON-BLOCKING IO for UDP */ 2508 /* SCTP_SET_SO_NBIO(so); */ 2509 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2510 /* TCP style socket */ 2511 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2512 SCTP_PCB_FLAGS_UNBOUND); 2513 /* Be sure we have blocking IO by default */ 2514 SCTP_CLEAR_SO_NBIO(so); 2515 } else { 2516 /* 2517 * unsupported socket type (RAW, etc)- in case we missed it 2518 * in protosw 2519 */ 2520 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2521 so->so_pcb = NULL; 2522 crfree(inp->ip_inp.inp.inp_cred); 2523 #ifdef IPSEC 2524 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2525 #endif 2526 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2527 return (EOPNOTSUPP); 2528 } 2529 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2530 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2531 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2532 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2533 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2534 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2535 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2536 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2537 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2538 } 2539 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2540 &inp->sctp_hashmark); 2541 if (inp->sctp_tcbhash == NULL) { 2542 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2543 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2544 so->so_pcb = NULL; 2545 crfree(inp->ip_inp.inp.inp_cred); 2546 #ifdef IPSEC 2547 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2548 #endif 2549 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2550 return (ENOBUFS); 2551 } 2552 inp->def_vrf_id = vrf_id; 2553 2554 SCTP_INP_INFO_WLOCK(); 2555 SCTP_INP_LOCK_INIT(inp); 2556 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2557 SCTP_INP_READ_INIT(inp); 2558 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2559 /* lock the new ep */ 2560 SCTP_INP_WLOCK(inp); 2561 2562 /* add it to the info area */ 2563 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2564 SCTP_INP_INFO_WUNLOCK(); 2565 2566 TAILQ_INIT(&inp->read_queue); 2567 LIST_INIT(&inp->sctp_addr_list); 2568 2569 LIST_INIT(&inp->sctp_asoc_list); 2570 2571 #ifdef SCTP_TRACK_FREED_ASOCS 2572 /* TEMP CODE */ 2573 LIST_INIT(&inp->sctp_asoc_free_list); 2574 #endif 2575 /* Init the timer structure for signature change */ 2576 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2577 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2578 2579 /* now init the actual endpoint default data */ 2580 m = &inp->sctp_ep; 2581 2582 /* setup the base timeout information */ 2583 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2584 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2585 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2586 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2587 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2588 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2589 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2590 /* all max/min max are in ms */ 2591 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2592 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2593 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2594 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2595 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2596 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2597 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2598 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2599 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2600 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2601 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2602 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2603 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2604 2605 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2606 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2607 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2608 /* number of streams to pre-open on a association */ 2609 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2610 2611 /* Add adaptation cookie */ 2612 m->adaptation_layer_indicator = 0; 2613 m->adaptation_layer_indicator_provided = 0; 2614 2615 /* seed random number generator */ 2616 m->random_counter = 1; 2617 m->store_at = SCTP_SIGNATURE_SIZE; 2618 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2619 sctp_fill_random_store(m); 2620 2621 /* Minimum cookie size */ 2622 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2623 sizeof(struct sctp_state_cookie); 2624 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2625 2626 /* Setup the initial secret */ 2627 (void)SCTP_GETTIME_TIMEVAL(&time); 2628 m->time_of_secret_change = time.tv_sec; 2629 2630 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2631 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2632 } 2633 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2634 2635 /* How long is a cookie good for ? */ 2636 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2637 /* 2638 * Initialize authentication parameters 2639 */ 2640 m->local_hmacs = sctp_default_supported_hmaclist(); 2641 m->local_auth_chunks = sctp_alloc_chunklist(); 2642 if (inp->asconf_supported) { 2643 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2644 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2645 } 2646 m->default_dscp = 0; 2647 #ifdef INET6 2648 m->default_flowlabel = 0; 2649 #endif 2650 m->port = 0; /* encapsulation disabled by default */ 2651 LIST_INIT(&m->shared_keys); 2652 /* add default NULL key as key id 0 */ 2653 null_key = sctp_alloc_sharedkey(); 2654 sctp_insert_sharedkey(&m->shared_keys, null_key); 2655 SCTP_INP_WUNLOCK(inp); 2656 #ifdef SCTP_LOG_CLOSING 2657 sctp_log_closing(inp, NULL, 12); 2658 #endif 2659 return (error); 2660 } 2661 2662 2663 void 2664 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2665 struct sctp_tcb *stcb) 2666 { 2667 struct sctp_nets *net; 2668 uint16_t lport, rport; 2669 struct sctppcbhead *head; 2670 struct sctp_laddr *laddr, *oladdr; 2671 2672 atomic_add_int(&stcb->asoc.refcnt, 1); 2673 SCTP_TCB_UNLOCK(stcb); 2674 SCTP_INP_INFO_WLOCK(); 2675 SCTP_INP_WLOCK(old_inp); 2676 SCTP_INP_WLOCK(new_inp); 2677 SCTP_TCB_LOCK(stcb); 2678 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2679 2680 new_inp->sctp_ep.time_of_secret_change = 2681 old_inp->sctp_ep.time_of_secret_change; 2682 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2683 sizeof(old_inp->sctp_ep.secret_key)); 2684 new_inp->sctp_ep.current_secret_number = 2685 old_inp->sctp_ep.current_secret_number; 2686 new_inp->sctp_ep.last_secret_number = 2687 old_inp->sctp_ep.last_secret_number; 2688 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2689 2690 /* make it so new data pours into the new socket */ 2691 stcb->sctp_socket = new_inp->sctp_socket; 2692 stcb->sctp_ep = new_inp; 2693 2694 /* Copy the port across */ 2695 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2696 rport = stcb->rport; 2697 /* Pull the tcb from the old association */ 2698 LIST_REMOVE(stcb, sctp_tcbhash); 2699 LIST_REMOVE(stcb, sctp_tcblist); 2700 if (stcb->asoc.in_asocid_hash) { 2701 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2702 } 2703 /* Now insert the new_inp into the TCP connected hash */ 2704 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2705 2706 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2707 /* Its safe to access */ 2708 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2709 2710 /* Now move the tcb into the endpoint list */ 2711 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2712 /* 2713 * Question, do we even need to worry about the ep-hash since we 2714 * only have one connection? Probably not :> so lets get rid of it 2715 * and not suck up any kernel memory in that. 2716 */ 2717 if (stcb->asoc.in_asocid_hash) { 2718 struct sctpasochead *lhd; 2719 2720 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2721 new_inp->hashasocidmark)]; 2722 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2723 } 2724 /* Ok. Let's restart timer. */ 2725 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2726 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2727 stcb, net); 2728 } 2729 2730 SCTP_INP_INFO_WUNLOCK(); 2731 if (new_inp->sctp_tcbhash != NULL) { 2732 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2733 new_inp->sctp_tcbhash = NULL; 2734 } 2735 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2736 /* Subset bound, so copy in the laddr list from the old_inp */ 2737 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2738 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2739 if (laddr == NULL) { 2740 /* 2741 * Gak, what can we do? This assoc is really 2742 * HOSED. We probably should send an abort 2743 * here. 2744 */ 2745 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2746 continue; 2747 } 2748 SCTP_INCR_LADDR_COUNT(); 2749 bzero(laddr, sizeof(*laddr)); 2750 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2751 laddr->ifa = oladdr->ifa; 2752 atomic_add_int(&laddr->ifa->refcount, 1); 2753 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2754 sctp_nxt_addr); 2755 new_inp->laddr_count++; 2756 if (oladdr == stcb->asoc.last_used_address) { 2757 stcb->asoc.last_used_address = laddr; 2758 } 2759 } 2760 } 2761 /* 2762 * Now any running timers need to be adjusted since we really don't 2763 * care if they are running or not just blast in the new_inp into 2764 * all of them. 2765 */ 2766 2767 stcb->asoc.dack_timer.ep = (void *)new_inp; 2768 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2769 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2770 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2771 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2772 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2773 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2774 /* now what about the nets? */ 2775 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2776 net->pmtu_timer.ep = (void *)new_inp; 2777 net->hb_timer.ep = (void *)new_inp; 2778 net->rxt_timer.ep = (void *)new_inp; 2779 } 2780 SCTP_INP_WUNLOCK(new_inp); 2781 SCTP_INP_WUNLOCK(old_inp); 2782 } 2783 2784 /* 2785 * insert an laddr entry with the given ifa for the desired list 2786 */ 2787 static int 2788 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2789 { 2790 struct sctp_laddr *laddr; 2791 2792 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2793 if (laddr == NULL) { 2794 /* out of memory? */ 2795 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2796 return (EINVAL); 2797 } 2798 SCTP_INCR_LADDR_COUNT(); 2799 bzero(laddr, sizeof(*laddr)); 2800 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2801 laddr->ifa = ifa; 2802 laddr->action = act; 2803 atomic_add_int(&ifa->refcount, 1); 2804 /* insert it */ 2805 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2806 2807 return (0); 2808 } 2809 2810 /* 2811 * Remove an laddr entry from the local address list (on an assoc) 2812 */ 2813 static void 2814 sctp_remove_laddr(struct sctp_laddr *laddr) 2815 { 2816 2817 /* remove from the list */ 2818 LIST_REMOVE(laddr, sctp_nxt_addr); 2819 sctp_free_ifa(laddr->ifa); 2820 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2821 SCTP_DECR_LADDR_COUNT(); 2822 } 2823 2824 2825 2826 /* sctp_ifap is used to bypass normal local address validation checks */ 2827 int 2828 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2829 struct sctp_ifa *sctp_ifap, struct thread *p) 2830 { 2831 /* bind a ep to a socket address */ 2832 struct sctppcbhead *head; 2833 struct sctp_inpcb *inp, *inp_tmp; 2834 struct inpcb *ip_inp; 2835 int port_reuse_active = 0; 2836 int bindall; 2837 uint16_t lport; 2838 int error; 2839 uint32_t vrf_id; 2840 2841 lport = 0; 2842 bindall = 1; 2843 inp = (struct sctp_inpcb *)so->so_pcb; 2844 ip_inp = (struct inpcb *)so->so_pcb; 2845 #ifdef SCTP_DEBUG 2846 if (addr) { 2847 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2848 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2849 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2850 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2851 } 2852 #endif 2853 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2854 /* already did a bind, subsequent binds NOT allowed ! */ 2855 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2856 return (EINVAL); 2857 } 2858 #ifdef INVARIANTS 2859 if (p == NULL) 2860 panic("null proc/thread"); 2861 #endif 2862 if (addr != NULL) { 2863 switch (addr->sa_family) { 2864 #ifdef INET 2865 case AF_INET: 2866 { 2867 struct sockaddr_in *sin; 2868 2869 /* IPV6_V6ONLY socket? */ 2870 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2871 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2872 return (EINVAL); 2873 } 2874 if (addr->sa_len != sizeof(*sin)) { 2875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2876 return (EINVAL); 2877 } 2878 sin = (struct sockaddr_in *)addr; 2879 lport = sin->sin_port; 2880 /* 2881 * For LOOPBACK the prison_local_ip4() call 2882 * will transmute the ip address to the 2883 * proper value. 2884 */ 2885 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2887 return (error); 2888 } 2889 if (sin->sin_addr.s_addr != INADDR_ANY) { 2890 bindall = 0; 2891 } 2892 break; 2893 } 2894 #endif 2895 #ifdef INET6 2896 case AF_INET6: 2897 { 2898 /* 2899 * Only for pure IPv6 Address. (No IPv4 2900 * Mapped!) 2901 */ 2902 struct sockaddr_in6 *sin6; 2903 2904 sin6 = (struct sockaddr_in6 *)addr; 2905 2906 if (addr->sa_len != sizeof(*sin6)) { 2907 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2908 return (EINVAL); 2909 } 2910 lport = sin6->sin6_port; 2911 /* 2912 * For LOOPBACK the prison_local_ip6() call 2913 * will transmute the ipv6 address to the 2914 * proper value. 2915 */ 2916 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2917 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2918 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2919 return (error); 2920 } 2921 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2922 bindall = 0; 2923 /* KAME hack: embed scopeid */ 2924 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2925 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2926 return (EINVAL); 2927 } 2928 } 2929 /* this must be cleared for ifa_ifwithaddr() */ 2930 sin6->sin6_scope_id = 0; 2931 break; 2932 } 2933 #endif 2934 default: 2935 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2936 return (EAFNOSUPPORT); 2937 } 2938 } 2939 SCTP_INP_INFO_WLOCK(); 2940 SCTP_INP_WLOCK(inp); 2941 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2942 vrf_id = inp->def_vrf_id; 2943 2944 /* increase our count due to the unlock we do */ 2945 SCTP_INP_INCR_REF(inp); 2946 if (lport) { 2947 /* 2948 * Did the caller specify a port? if so we must see if an ep 2949 * already has this one bound. 2950 */ 2951 /* got to be root to get at low ports */ 2952 if (ntohs(lport) < IPPORT_RESERVED) { 2953 if (p && (error = 2954 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2955 )) { 2956 SCTP_INP_DECR_REF(inp); 2957 SCTP_INP_WUNLOCK(inp); 2958 SCTP_INP_INFO_WUNLOCK(); 2959 return (error); 2960 } 2961 } 2962 SCTP_INP_WUNLOCK(inp); 2963 if (bindall) { 2964 vrf_id = inp->def_vrf_id; 2965 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2966 if (inp_tmp != NULL) { 2967 /* 2968 * lock guy returned and lower count note 2969 * that we are not bound so inp_tmp should 2970 * NEVER be inp. And it is this inp 2971 * (inp_tmp) that gets the reference bump, 2972 * so we must lower it. 2973 */ 2974 SCTP_INP_DECR_REF(inp_tmp); 2975 /* unlock info */ 2976 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2977 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2978 /* 2979 * Ok, must be one-2-one and 2980 * allowing port re-use 2981 */ 2982 port_reuse_active = 1; 2983 goto continue_anyway; 2984 } 2985 SCTP_INP_DECR_REF(inp); 2986 SCTP_INP_INFO_WUNLOCK(); 2987 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2988 return (EADDRINUSE); 2989 } 2990 } else { 2991 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2992 if (inp_tmp != NULL) { 2993 /* 2994 * lock guy returned and lower count note 2995 * that we are not bound so inp_tmp should 2996 * NEVER be inp. And it is this inp 2997 * (inp_tmp) that gets the reference bump, 2998 * so we must lower it. 2999 */ 3000 SCTP_INP_DECR_REF(inp_tmp); 3001 /* unlock info */ 3002 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3003 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3004 /* 3005 * Ok, must be one-2-one and 3006 * allowing port re-use 3007 */ 3008 port_reuse_active = 1; 3009 goto continue_anyway; 3010 } 3011 SCTP_INP_DECR_REF(inp); 3012 SCTP_INP_INFO_WUNLOCK(); 3013 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3014 return (EADDRINUSE); 3015 } 3016 } 3017 continue_anyway: 3018 SCTP_INP_WLOCK(inp); 3019 if (bindall) { 3020 /* verify that no lport is not used by a singleton */ 3021 if ((port_reuse_active == 0) && 3022 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3023 /* Sorry someone already has this one bound */ 3024 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3025 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3026 port_reuse_active = 1; 3027 } else { 3028 SCTP_INP_DECR_REF(inp); 3029 SCTP_INP_WUNLOCK(inp); 3030 SCTP_INP_INFO_WUNLOCK(); 3031 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3032 return (EADDRINUSE); 3033 } 3034 } 3035 } 3036 } else { 3037 uint16_t first, last, candidate; 3038 uint16_t count; 3039 int done; 3040 3041 if (ip_inp->inp_flags & INP_HIGHPORT) { 3042 first = MODULE_GLOBAL(ipport_hifirstauto); 3043 last = MODULE_GLOBAL(ipport_hilastauto); 3044 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3045 if (p && (error = 3046 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3047 )) { 3048 SCTP_INP_DECR_REF(inp); 3049 SCTP_INP_WUNLOCK(inp); 3050 SCTP_INP_INFO_WUNLOCK(); 3051 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3052 return (error); 3053 } 3054 first = MODULE_GLOBAL(ipport_lowfirstauto); 3055 last = MODULE_GLOBAL(ipport_lowlastauto); 3056 } else { 3057 first = MODULE_GLOBAL(ipport_firstauto); 3058 last = MODULE_GLOBAL(ipport_lastauto); 3059 } 3060 if (first > last) { 3061 uint16_t temp; 3062 3063 temp = first; 3064 first = last; 3065 last = temp; 3066 } 3067 count = last - first + 1; /* number of candidates */ 3068 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3069 3070 done = 0; 3071 while (!done) { 3072 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3073 done = 1; 3074 } 3075 if (!done) { 3076 if (--count == 0) { 3077 SCTP_INP_DECR_REF(inp); 3078 SCTP_INP_WUNLOCK(inp); 3079 SCTP_INP_INFO_WUNLOCK(); 3080 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3081 return (EADDRINUSE); 3082 } 3083 if (candidate == last) 3084 candidate = first; 3085 else 3086 candidate = candidate + 1; 3087 } 3088 } 3089 lport = htons(candidate); 3090 } 3091 SCTP_INP_DECR_REF(inp); 3092 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3093 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3094 /* 3095 * this really should not happen. The guy did a non-blocking 3096 * bind and then did a close at the same time. 3097 */ 3098 SCTP_INP_WUNLOCK(inp); 3099 SCTP_INP_INFO_WUNLOCK(); 3100 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3101 return (EINVAL); 3102 } 3103 /* ok we look clear to give out this port, so lets setup the binding */ 3104 if (bindall) { 3105 /* binding to all addresses, so just set in the proper flags */ 3106 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3107 /* set the automatic addr changes from kernel flag */ 3108 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3109 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3110 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3111 } else { 3112 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3113 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3114 } 3115 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3116 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3117 } else { 3118 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3119 } 3120 /* 3121 * set the automatic mobility_base from kernel flag (by 3122 * micchie) 3123 */ 3124 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3125 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3126 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3127 } else { 3128 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3129 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3130 } 3131 /* 3132 * set the automatic mobility_fasthandoff from kernel flag 3133 * (by micchie) 3134 */ 3135 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3136 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3137 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3138 } else { 3139 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3140 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3141 } 3142 } else { 3143 /* 3144 * bind specific, make sure flags is off and add a new 3145 * address structure to the sctp_addr_list inside the ep 3146 * structure. 3147 * 3148 * We will need to allocate one and insert it at the head. The 3149 * socketopt call can just insert new addresses in there as 3150 * well. It will also have to do the embed scope kame hack 3151 * too (before adding). 3152 */ 3153 struct sctp_ifa *ifa; 3154 union sctp_sockstore store; 3155 3156 memset(&store, 0, sizeof(store)); 3157 switch (addr->sa_family) { 3158 #ifdef INET 3159 case AF_INET: 3160 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3161 store.sin.sin_port = 0; 3162 break; 3163 #endif 3164 #ifdef INET6 3165 case AF_INET6: 3166 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3167 store.sin6.sin6_port = 0; 3168 break; 3169 #endif 3170 default: 3171 break; 3172 } 3173 /* 3174 * first find the interface with the bound address need to 3175 * zero out the port to find the address! yuck! can't do 3176 * this earlier since need port for sctp_pcb_findep() 3177 */ 3178 if (sctp_ifap != NULL) { 3179 ifa = sctp_ifap; 3180 } else { 3181 /* 3182 * Note for BSD we hit here always other O/S's will 3183 * pass things in via the sctp_ifap argument 3184 * (Panda). 3185 */ 3186 ifa = sctp_find_ifa_by_addr(&store.sa, 3187 vrf_id, SCTP_ADDR_NOT_LOCKED); 3188 } 3189 if (ifa == NULL) { 3190 /* Can't find an interface with that address */ 3191 SCTP_INP_WUNLOCK(inp); 3192 SCTP_INP_INFO_WUNLOCK(); 3193 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3194 return (EADDRNOTAVAIL); 3195 } 3196 #ifdef INET6 3197 if (addr->sa_family == AF_INET6) { 3198 /* GAK, more FIXME IFA lock? */ 3199 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3200 /* Can't bind a non-existent addr. */ 3201 SCTP_INP_WUNLOCK(inp); 3202 SCTP_INP_INFO_WUNLOCK(); 3203 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3204 return (EINVAL); 3205 } 3206 } 3207 #endif 3208 /* we're not bound all */ 3209 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3210 /* allow bindx() to send ASCONF's for binding changes */ 3211 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3212 /* clear automatic addr changes from kernel flag */ 3213 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3214 3215 /* add this address to the endpoint list */ 3216 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3217 if (error != 0) { 3218 SCTP_INP_WUNLOCK(inp); 3219 SCTP_INP_INFO_WUNLOCK(); 3220 return (error); 3221 } 3222 inp->laddr_count++; 3223 } 3224 /* find the bucket */ 3225 if (port_reuse_active) { 3226 /* Put it into tcp 1-2-1 hash */ 3227 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3228 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3229 } else { 3230 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3231 } 3232 /* put it in the bucket */ 3233 LIST_INSERT_HEAD(head, inp, sctp_hash); 3234 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3235 (void *)head, ntohs(lport), port_reuse_active); 3236 /* set in the port */ 3237 inp->sctp_lport = lport; 3238 3239 /* turn off just the unbound flag */ 3240 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3241 SCTP_INP_WUNLOCK(inp); 3242 SCTP_INP_INFO_WUNLOCK(); 3243 return (0); 3244 } 3245 3246 3247 static void 3248 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3249 { 3250 struct sctp_iterator *it, *nit; 3251 3252 /* 3253 * We enter with the only the ITERATOR_LOCK in place and a write 3254 * lock on the inp_info stuff. 3255 */ 3256 it = sctp_it_ctl.cur_it; 3257 if (it && (it->vn != curvnet)) { 3258 /* Its not looking at our VNET */ 3259 return; 3260 } 3261 if (it && (it->inp == inp)) { 3262 /* 3263 * This is tricky and we hold the iterator lock, but when it 3264 * returns and gets the lock (when we release it) the 3265 * iterator will try to operate on inp. We need to stop that 3266 * from happening. But of course the iterator has a 3267 * reference on the stcb and inp. We can mark it and it will 3268 * stop. 3269 * 3270 * If its a single iterator situation, we set the end iterator 3271 * flag. Otherwise we set the iterator to go to the next 3272 * inp. 3273 * 3274 */ 3275 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3276 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3277 } else { 3278 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3279 } 3280 } 3281 /* 3282 * Now go through and remove any single reference to our inp that 3283 * may be still pending on the list 3284 */ 3285 SCTP_IPI_ITERATOR_WQ_LOCK(); 3286 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3287 if (it->vn != curvnet) { 3288 continue; 3289 } 3290 if (it->inp == inp) { 3291 /* This one points to me is it inp specific? */ 3292 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3293 /* Remove and free this one */ 3294 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3295 it, sctp_nxt_itr); 3296 if (it->function_atend != NULL) { 3297 (*it->function_atend) (it->pointer, it->val); 3298 } 3299 SCTP_FREE(it, SCTP_M_ITER); 3300 } else { 3301 it->inp = LIST_NEXT(it->inp, sctp_list); 3302 if (it->inp) { 3303 SCTP_INP_INCR_REF(it->inp); 3304 } 3305 } 3306 /* 3307 * When its put in the refcnt is incremented so decr 3308 * it 3309 */ 3310 SCTP_INP_DECR_REF(inp); 3311 } 3312 } 3313 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3314 } 3315 3316 /* release sctp_inpcb unbind the port */ 3317 void 3318 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3319 { 3320 /* 3321 * Here we free a endpoint. We must find it (if it is in the Hash 3322 * table) and remove it from there. Then we must also find it in the 3323 * overall list and remove it from there. After all removals are 3324 * complete then any timer has to be stopped. Then start the actual 3325 * freeing. a) Any local lists. b) Any associations. c) The hash of 3326 * all associations. d) finally the ep itself. 3327 */ 3328 struct sctp_tcb *asoc, *nasoc; 3329 struct sctp_laddr *laddr, *nladdr; 3330 struct inpcb *ip_pcb; 3331 struct socket *so; 3332 int being_refed = 0; 3333 struct sctp_queued_to_read *sq, *nsq; 3334 int cnt; 3335 sctp_sharedkey_t *shared_key, *nshared_key; 3336 3337 3338 #ifdef SCTP_LOG_CLOSING 3339 sctp_log_closing(inp, NULL, 0); 3340 #endif 3341 SCTP_ITERATOR_LOCK(); 3342 /* mark any iterators on the list or being processed */ 3343 sctp_iterator_inp_being_freed(inp); 3344 SCTP_ITERATOR_UNLOCK(); 3345 so = inp->sctp_socket; 3346 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3347 /* been here before.. eeks.. get out of here */ 3348 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3349 #ifdef SCTP_LOG_CLOSING 3350 sctp_log_closing(inp, NULL, 1); 3351 #endif 3352 return; 3353 } 3354 SCTP_ASOC_CREATE_LOCK(inp); 3355 SCTP_INP_INFO_WLOCK(); 3356 3357 SCTP_INP_WLOCK(inp); 3358 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3359 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3360 /* socket is gone, so no more wakeups allowed */ 3361 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3362 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3363 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3364 3365 } 3366 /* First time through we have the socket lock, after that no more. */ 3367 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3368 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3369 3370 if (inp->control) { 3371 sctp_m_freem(inp->control); 3372 inp->control = NULL; 3373 } 3374 if (inp->pkt) { 3375 sctp_m_freem(inp->pkt); 3376 inp->pkt = NULL; 3377 } 3378 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3379 * here but I will be nice :> (i.e. 3380 * ip_pcb = ep;) */ 3381 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3382 int cnt_in_sd; 3383 3384 cnt_in_sd = 0; 3385 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3386 SCTP_TCB_LOCK(asoc); 3387 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3388 /* Skip guys being freed */ 3389 cnt_in_sd++; 3390 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3391 /* 3392 * Special case - we did not start a 3393 * kill timer on the asoc due to it 3394 * was not closed. So go ahead and 3395 * start it now. 3396 */ 3397 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3398 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3399 } 3400 SCTP_TCB_UNLOCK(asoc); 3401 continue; 3402 } 3403 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3404 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3405 (asoc->asoc.total_output_queue_size == 0)) { 3406 /* 3407 * If we have data in queue, we don't want 3408 * to just free since the app may have done, 3409 * send()/close or connect/send/close. And 3410 * it wants the data to get across first. 3411 */ 3412 /* Just abandon things in the front states */ 3413 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3414 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3415 cnt_in_sd++; 3416 } 3417 continue; 3418 } 3419 /* Disconnect the socket please */ 3420 asoc->sctp_socket = NULL; 3421 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3422 if ((asoc->asoc.size_on_reasm_queue > 0) || 3423 (asoc->asoc.control_pdapi) || 3424 (asoc->asoc.size_on_all_streams > 0) || 3425 (so && (so->so_rcv.sb_cc > 0))) { 3426 /* Left with Data unread */ 3427 struct mbuf *op_err; 3428 3429 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3430 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3431 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3432 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3433 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3434 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3435 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3436 } 3437 if (sctp_free_assoc(inp, asoc, 3438 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3439 cnt_in_sd++; 3440 } 3441 continue; 3442 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3443 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3444 (asoc->asoc.stream_queue_cnt == 0)) { 3445 if (asoc->asoc.locked_on_sending) { 3446 goto abort_anyway; 3447 } 3448 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3449 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3450 struct sctp_nets *netp; 3451 3452 /* 3453 * there is nothing queued to send, 3454 * so I send shutdown 3455 */ 3456 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3457 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3458 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3459 } 3460 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3461 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3462 sctp_stop_timers_for_shutdown(asoc); 3463 if (asoc->asoc.alternate) { 3464 netp = asoc->asoc.alternate; 3465 } else { 3466 netp = asoc->asoc.primary_destination; 3467 } 3468 sctp_send_shutdown(asoc, netp); 3469 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3470 netp); 3471 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3472 asoc->asoc.primary_destination); 3473 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3474 } 3475 } else { 3476 /* mark into shutdown pending */ 3477 struct sctp_stream_queue_pending *sp; 3478 3479 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3480 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3481 asoc->asoc.primary_destination); 3482 if (asoc->asoc.locked_on_sending) { 3483 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3484 sctp_streamhead); 3485 if (sp == NULL) { 3486 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3487 (void *)asoc->asoc.locked_on_sending, 3488 asoc->asoc.locked_on_sending->stream_no); 3489 } else { 3490 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3491 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3492 } 3493 } 3494 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3495 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3496 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3497 struct mbuf *op_err; 3498 3499 abort_anyway: 3500 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3501 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3502 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3503 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3504 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3505 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3506 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3507 } 3508 if (sctp_free_assoc(inp, asoc, 3509 SCTP_PCBFREE_NOFORCE, 3510 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3511 cnt_in_sd++; 3512 } 3513 continue; 3514 } else { 3515 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3516 } 3517 } 3518 cnt_in_sd++; 3519 SCTP_TCB_UNLOCK(asoc); 3520 } 3521 /* now is there some left in our SHUTDOWN state? */ 3522 if (cnt_in_sd) { 3523 #ifdef SCTP_LOG_CLOSING 3524 sctp_log_closing(inp, NULL, 2); 3525 #endif 3526 inp->sctp_socket = NULL; 3527 SCTP_INP_WUNLOCK(inp); 3528 SCTP_ASOC_CREATE_UNLOCK(inp); 3529 SCTP_INP_INFO_WUNLOCK(); 3530 return; 3531 } 3532 } 3533 inp->sctp_socket = NULL; 3534 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3535 SCTP_PCB_FLAGS_UNBOUND) { 3536 /* 3537 * ok, this guy has been bound. It's port is somewhere in 3538 * the SCTP_BASE_INFO(hash table). Remove it! 3539 */ 3540 LIST_REMOVE(inp, sctp_hash); 3541 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3542 } 3543 /* 3544 * If there is a timer running to kill us, forget it, since it may 3545 * have a contest on the INP lock.. which would cause us to die ... 3546 */ 3547 cnt = 0; 3548 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3549 SCTP_TCB_LOCK(asoc); 3550 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3551 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3552 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3553 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3554 } 3555 cnt++; 3556 SCTP_TCB_UNLOCK(asoc); 3557 continue; 3558 } 3559 /* Free associations that are NOT killing us */ 3560 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3561 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3562 struct mbuf *op_err; 3563 3564 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3565 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3566 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3567 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3568 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3569 cnt++; 3570 SCTP_TCB_UNLOCK(asoc); 3571 continue; 3572 } 3573 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3574 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3575 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3576 } 3577 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3578 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3579 cnt++; 3580 } 3581 } 3582 if (cnt) { 3583 /* Ok we have someone out there that will kill us */ 3584 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3585 #ifdef SCTP_LOG_CLOSING 3586 sctp_log_closing(inp, NULL, 3); 3587 #endif 3588 SCTP_INP_WUNLOCK(inp); 3589 SCTP_ASOC_CREATE_UNLOCK(inp); 3590 SCTP_INP_INFO_WUNLOCK(); 3591 return; 3592 } 3593 if (SCTP_INP_LOCK_CONTENDED(inp)) 3594 being_refed++; 3595 if (SCTP_INP_READ_CONTENDED(inp)) 3596 being_refed++; 3597 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3598 being_refed++; 3599 3600 if ((inp->refcount) || 3601 (being_refed) || 3602 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3603 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3604 #ifdef SCTP_LOG_CLOSING 3605 sctp_log_closing(inp, NULL, 4); 3606 #endif 3607 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3608 SCTP_INP_WUNLOCK(inp); 3609 SCTP_ASOC_CREATE_UNLOCK(inp); 3610 SCTP_INP_INFO_WUNLOCK(); 3611 return; 3612 } 3613 inp->sctp_ep.signature_change.type = 0; 3614 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3615 /* 3616 * Remove it from the list .. last thing we need a lock for. 3617 */ 3618 LIST_REMOVE(inp, sctp_list); 3619 SCTP_INP_WUNLOCK(inp); 3620 SCTP_ASOC_CREATE_UNLOCK(inp); 3621 SCTP_INP_INFO_WUNLOCK(); 3622 /* 3623 * Now we release all locks. Since this INP cannot be found anymore 3624 * except possibly by the kill timer that might be running. We call 3625 * the drain function here. It should hit the case were it sees the 3626 * ACTIVE flag cleared and exit out freeing us to proceed and 3627 * destroy everything. 3628 */ 3629 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3630 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3631 } else { 3632 /* Probably un-needed */ 3633 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3634 } 3635 3636 #ifdef SCTP_LOG_CLOSING 3637 sctp_log_closing(inp, NULL, 5); 3638 #endif 3639 3640 3641 if ((inp->sctp_asocidhash) != NULL) { 3642 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3643 inp->sctp_asocidhash = NULL; 3644 } 3645 /* sa_ignore FREED_MEMORY */ 3646 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3647 /* Its only abandoned if it had data left */ 3648 if (sq->length) 3649 SCTP_STAT_INCR(sctps_left_abandon); 3650 3651 TAILQ_REMOVE(&inp->read_queue, sq, next); 3652 sctp_free_remote_addr(sq->whoFrom); 3653 if (so) 3654 so->so_rcv.sb_cc -= sq->length; 3655 if (sq->data) { 3656 sctp_m_freem(sq->data); 3657 sq->data = NULL; 3658 } 3659 /* 3660 * no need to free the net count, since at this point all 3661 * assoc's are gone. 3662 */ 3663 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3664 SCTP_DECR_READQ_COUNT(); 3665 } 3666 /* Now the sctp_pcb things */ 3667 /* 3668 * free each asoc if it is not already closed/free. we can't use the 3669 * macro here since le_next will get freed as part of the 3670 * sctp_free_assoc() call. 3671 */ 3672 #ifdef IPSEC 3673 ipsec_delete_pcbpolicy(ip_pcb); 3674 #endif 3675 if (ip_pcb->inp_options) { 3676 (void)sctp_m_free(ip_pcb->inp_options); 3677 ip_pcb->inp_options = 0; 3678 } 3679 #ifdef INET6 3680 if (ip_pcb->inp_vflag & INP_IPV6) { 3681 struct in6pcb *in6p; 3682 3683 in6p = (struct in6pcb *)inp; 3684 ip6_freepcbopts(in6p->in6p_outputopts); 3685 } 3686 #endif /* INET6 */ 3687 ip_pcb->inp_vflag = 0; 3688 /* free up authentication fields */ 3689 if (inp->sctp_ep.local_auth_chunks != NULL) 3690 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3691 if (inp->sctp_ep.local_hmacs != NULL) 3692 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3693 3694 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3695 LIST_REMOVE(shared_key, next); 3696 sctp_free_sharedkey(shared_key); 3697 /* sa_ignore FREED_MEMORY */ 3698 } 3699 3700 /* 3701 * if we have an address list the following will free the list of 3702 * ifaddr's that are set into this ep. Again macro limitations here, 3703 * since the LIST_FOREACH could be a bad idea. 3704 */ 3705 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3706 sctp_remove_laddr(laddr); 3707 } 3708 3709 #ifdef SCTP_TRACK_FREED_ASOCS 3710 /* TEMP CODE */ 3711 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3712 LIST_REMOVE(asoc, sctp_tcblist); 3713 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3714 SCTP_DECR_ASOC_COUNT(); 3715 } 3716 /* *** END TEMP CODE *** */ 3717 #endif 3718 /* Now lets see about freeing the EP hash table. */ 3719 if (inp->sctp_tcbhash != NULL) { 3720 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3721 inp->sctp_tcbhash = NULL; 3722 } 3723 /* Now we must put the ep memory back into the zone pool */ 3724 crfree(inp->ip_inp.inp.inp_cred); 3725 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3726 SCTP_INP_LOCK_DESTROY(inp); 3727 SCTP_INP_READ_DESTROY(inp); 3728 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3729 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3730 SCTP_DECR_EP_COUNT(); 3731 } 3732 3733 3734 struct sctp_nets * 3735 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3736 { 3737 struct sctp_nets *net; 3738 3739 /* locate the address */ 3740 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3741 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3742 return (net); 3743 } 3744 return (NULL); 3745 } 3746 3747 3748 int 3749 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3750 { 3751 struct sctp_ifa *sctp_ifa; 3752 3753 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3754 if (sctp_ifa) { 3755 return (1); 3756 } else { 3757 return (0); 3758 } 3759 } 3760 3761 /* 3762 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3763 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3764 * stats of stuff. 3765 */ 3766 int 3767 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3768 struct sctp_nets **netp, int set_scope, int from) 3769 { 3770 /* 3771 * The following is redundant to the same lines in the 3772 * sctp_aloc_assoc() but is needed since others call the add address 3773 * function 3774 */ 3775 struct sctp_nets *net, *netfirst; 3776 int addr_inscope; 3777 3778 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3779 from); 3780 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3781 3782 netfirst = sctp_findnet(stcb, newaddr); 3783 if (netfirst) { 3784 /* 3785 * Lie and return ok, we don't want to make the association 3786 * go away for this behavior. It will happen in the TCP 3787 * model in a connected socket. It does not reach the hash 3788 * table until after the association is built so it can't be 3789 * found. Mark as reachable, since the initial creation will 3790 * have been cleared and the NOT_IN_ASSOC flag will have 3791 * been added... and we don't want to end up removing it 3792 * back out. 3793 */ 3794 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3795 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3796 SCTP_ADDR_UNCONFIRMED); 3797 } else { 3798 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3799 } 3800 3801 return (0); 3802 } 3803 addr_inscope = 1; 3804 switch (newaddr->sa_family) { 3805 #ifdef INET 3806 case AF_INET: 3807 { 3808 struct sockaddr_in *sin; 3809 3810 sin = (struct sockaddr_in *)newaddr; 3811 if (sin->sin_addr.s_addr == 0) { 3812 /* Invalid address */ 3813 return (-1); 3814 } 3815 /* zero out the bzero area */ 3816 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3817 3818 /* assure len is set */ 3819 sin->sin_len = sizeof(struct sockaddr_in); 3820 if (set_scope) { 3821 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3822 stcb->asoc.scope.ipv4_local_scope = 1; 3823 } 3824 } else { 3825 /* Validate the address is in scope */ 3826 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3827 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3828 addr_inscope = 0; 3829 } 3830 } 3831 break; 3832 } 3833 #endif 3834 #ifdef INET6 3835 case AF_INET6: 3836 { 3837 struct sockaddr_in6 *sin6; 3838 3839 sin6 = (struct sockaddr_in6 *)newaddr; 3840 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3841 /* Invalid address */ 3842 return (-1); 3843 } 3844 /* assure len is set */ 3845 sin6->sin6_len = sizeof(struct sockaddr_in6); 3846 if (set_scope) { 3847 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3848 stcb->asoc.scope.loopback_scope = 1; 3849 stcb->asoc.scope.local_scope = 0; 3850 stcb->asoc.scope.ipv4_local_scope = 1; 3851 stcb->asoc.scope.site_scope = 1; 3852 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3853 /* 3854 * If the new destination is a 3855 * LINK_LOCAL we must have common 3856 * site scope. Don't set the local 3857 * scope since we may not share all 3858 * links, only loopback can do this. 3859 * Links on the local network would 3860 * also be on our private network 3861 * for v4 too. 3862 */ 3863 stcb->asoc.scope.ipv4_local_scope = 1; 3864 stcb->asoc.scope.site_scope = 1; 3865 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3866 /* 3867 * If the new destination is 3868 * SITE_LOCAL then we must have site 3869 * scope in common. 3870 */ 3871 stcb->asoc.scope.site_scope = 1; 3872 } 3873 } else { 3874 /* Validate the address is in scope */ 3875 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3876 (stcb->asoc.scope.loopback_scope == 0)) { 3877 addr_inscope = 0; 3878 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3879 (stcb->asoc.scope.local_scope == 0)) { 3880 addr_inscope = 0; 3881 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3882 (stcb->asoc.scope.site_scope == 0)) { 3883 addr_inscope = 0; 3884 } 3885 } 3886 break; 3887 } 3888 #endif 3889 default: 3890 /* not supported family type */ 3891 return (-1); 3892 } 3893 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3894 if (net == NULL) { 3895 return (-1); 3896 } 3897 SCTP_INCR_RADDR_COUNT(); 3898 bzero(net, sizeof(struct sctp_nets)); 3899 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3900 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3901 switch (newaddr->sa_family) { 3902 #ifdef INET 3903 case AF_INET: 3904 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3905 break; 3906 #endif 3907 #ifdef INET6 3908 case AF_INET6: 3909 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3910 break; 3911 #endif 3912 default: 3913 break; 3914 } 3915 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3916 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3917 stcb->asoc.scope.loopback_scope = 1; 3918 stcb->asoc.scope.ipv4_local_scope = 1; 3919 stcb->asoc.scope.local_scope = 0; 3920 stcb->asoc.scope.site_scope = 1; 3921 addr_inscope = 1; 3922 } 3923 net->failure_threshold = stcb->asoc.def_net_failure; 3924 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3925 if (addr_inscope == 0) { 3926 net->dest_state = (SCTP_ADDR_REACHABLE | 3927 SCTP_ADDR_OUT_OF_SCOPE); 3928 } else { 3929 if (from == SCTP_ADDR_IS_CONFIRMED) 3930 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3931 net->dest_state = SCTP_ADDR_REACHABLE; 3932 else 3933 net->dest_state = SCTP_ADDR_REACHABLE | 3934 SCTP_ADDR_UNCONFIRMED; 3935 } 3936 /* 3937 * We set this to 0, the timer code knows that this means its an 3938 * initial value 3939 */ 3940 net->rto_needed = 1; 3941 net->RTO = 0; 3942 net->RTO_measured = 0; 3943 stcb->asoc.numnets++; 3944 net->ref_count = 1; 3945 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3946 net->port = stcb->asoc.port; 3947 net->dscp = stcb->asoc.default_dscp; 3948 #ifdef INET6 3949 net->flowlabel = stcb->asoc.default_flowlabel; 3950 #endif 3951 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3952 net->dest_state |= SCTP_ADDR_NOHB; 3953 } else { 3954 net->dest_state &= ~SCTP_ADDR_NOHB; 3955 } 3956 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3957 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3958 } else { 3959 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3960 } 3961 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3962 /* Init the timer structure */ 3963 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3964 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3965 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3966 3967 /* Now generate a route for this guy */ 3968 #ifdef INET6 3969 /* KAME hack: embed scopeid */ 3970 if (newaddr->sa_family == AF_INET6) { 3971 struct sockaddr_in6 *sin6; 3972 3973 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3974 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3975 sin6->sin6_scope_id = 0; 3976 } 3977 #endif 3978 SCTP_RTALLOC((sctp_route_t *) & net->ro, 3979 stcb->asoc.vrf_id, 3980 stcb->sctp_ep->fibnum); 3981 3982 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3983 /* Get source address */ 3984 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3985 stcb, 3986 (sctp_route_t *) & net->ro, 3987 net, 3988 0, 3989 stcb->asoc.vrf_id); 3990 if (net->ro._s_addr != NULL) { 3991 net->src_addr_selected = 1; 3992 /* Now get the interface MTU */ 3993 if (net->ro._s_addr->ifn_p != NULL) { 3994 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3995 } 3996 } else { 3997 net->src_addr_selected = 0; 3998 } 3999 if (net->mtu > 0) { 4000 uint32_t rmtu; 4001 4002 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 4003 if (rmtu == 0) { 4004 /* 4005 * Start things off to match mtu of 4006 * interface please. 4007 */ 4008 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 4009 net->ro.ro_rt, net->mtu); 4010 } else { 4011 /* 4012 * we take the route mtu over the interface, 4013 * since the route may be leading out the 4014 * loopback, or a different interface. 4015 */ 4016 net->mtu = rmtu; 4017 } 4018 } 4019 } else { 4020 net->src_addr_selected = 0; 4021 } 4022 if (net->mtu == 0) { 4023 switch (newaddr->sa_family) { 4024 #ifdef INET 4025 case AF_INET: 4026 net->mtu = SCTP_DEFAULT_MTU; 4027 break; 4028 #endif 4029 #ifdef INET6 4030 case AF_INET6: 4031 net->mtu = 1280; 4032 break; 4033 #endif 4034 default: 4035 break; 4036 } 4037 } 4038 #if defined(INET) || defined(INET6) 4039 if (net->port) { 4040 net->mtu -= (uint32_t) sizeof(struct udphdr); 4041 } 4042 #endif 4043 if (from == SCTP_ALLOC_ASOC) { 4044 stcb->asoc.smallest_mtu = net->mtu; 4045 } 4046 if (stcb->asoc.smallest_mtu > net->mtu) { 4047 stcb->asoc.smallest_mtu = net->mtu; 4048 } 4049 #ifdef INET6 4050 if (newaddr->sa_family == AF_INET6) { 4051 struct sockaddr_in6 *sin6; 4052 4053 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4054 (void)sa6_recoverscope(sin6); 4055 } 4056 #endif 4057 4058 /* JRS - Use the congestion control given in the CC module */ 4059 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4060 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4061 4062 /* 4063 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4064 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4065 */ 4066 net->find_pseudo_cumack = 1; 4067 net->find_rtx_pseudo_cumack = 1; 4068 /* Choose an initial flowid. */ 4069 net->flowid = stcb->asoc.my_vtag ^ 4070 ntohs(stcb->rport) ^ 4071 ntohs(stcb->sctp_ep->sctp_lport); 4072 net->flowtype = M_HASHTYPE_OPAQUE; 4073 if (netp) { 4074 *netp = net; 4075 } 4076 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4077 if (net->ro.ro_rt == NULL) { 4078 /* Since we have no route put it at the back */ 4079 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4080 } else if (netfirst == NULL) { 4081 /* We are the first one in the pool. */ 4082 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4083 } else if (netfirst->ro.ro_rt == NULL) { 4084 /* 4085 * First one has NO route. Place this one ahead of the first 4086 * one. 4087 */ 4088 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4089 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4090 /* 4091 * This one has a different interface than the one at the 4092 * top of the list. Place it ahead. 4093 */ 4094 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4095 } else { 4096 /* 4097 * Ok we have the same interface as the first one. Move 4098 * forward until we find either a) one with a NULL route... 4099 * insert ahead of that b) one with a different ifp.. insert 4100 * after that. c) end of the list.. insert at the tail. 4101 */ 4102 struct sctp_nets *netlook; 4103 4104 do { 4105 netlook = TAILQ_NEXT(netfirst, sctp_next); 4106 if (netlook == NULL) { 4107 /* End of the list */ 4108 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4109 break; 4110 } else if (netlook->ro.ro_rt == NULL) { 4111 /* next one has NO route */ 4112 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4113 break; 4114 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4115 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4116 net, sctp_next); 4117 break; 4118 } 4119 /* Shift forward */ 4120 netfirst = netlook; 4121 } while (netlook != NULL); 4122 } 4123 4124 /* got to have a primary set */ 4125 if (stcb->asoc.primary_destination == 0) { 4126 stcb->asoc.primary_destination = net; 4127 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4128 (net->ro.ro_rt) && 4129 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4130 /* No route to current primary adopt new primary */ 4131 stcb->asoc.primary_destination = net; 4132 } 4133 /* Validate primary is first */ 4134 net = TAILQ_FIRST(&stcb->asoc.nets); 4135 if ((net != stcb->asoc.primary_destination) && 4136 (stcb->asoc.primary_destination)) { 4137 /* 4138 * first one on the list is NOT the primary sctp_cmpaddr() 4139 * is much more efficient if the primary is the first on the 4140 * list, make it so. 4141 */ 4142 TAILQ_REMOVE(&stcb->asoc.nets, 4143 stcb->asoc.primary_destination, sctp_next); 4144 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4145 stcb->asoc.primary_destination, sctp_next); 4146 } 4147 return (0); 4148 } 4149 4150 4151 static uint32_t 4152 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4153 { 4154 uint32_t id; 4155 struct sctpasochead *head; 4156 struct sctp_tcb *lstcb; 4157 4158 SCTP_INP_WLOCK(inp); 4159 try_again: 4160 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4161 /* TSNH */ 4162 SCTP_INP_WUNLOCK(inp); 4163 return (0); 4164 } 4165 /* 4166 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4167 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4168 */ 4169 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4170 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4171 } 4172 id = inp->sctp_associd_counter; 4173 inp->sctp_associd_counter++; 4174 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4175 if (lstcb) { 4176 goto try_again; 4177 } 4178 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4179 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4180 stcb->asoc.in_asocid_hash = 1; 4181 SCTP_INP_WUNLOCK(inp); 4182 return id; 4183 } 4184 4185 /* 4186 * allocate an association and add it to the endpoint. The caller must be 4187 * careful to add all additional addresses once they are know right away or 4188 * else the assoc will be may experience a blackout scenario. 4189 */ 4190 struct sctp_tcb * 4191 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4192 int *error, uint32_t override_tag, uint32_t vrf_id, 4193 uint16_t o_streams, 4194 struct thread *p 4195 ) 4196 { 4197 /* note the p argument is only valid in unbound sockets */ 4198 4199 struct sctp_tcb *stcb; 4200 struct sctp_association *asoc; 4201 struct sctpasochead *head; 4202 uint16_t rport; 4203 int err; 4204 4205 /* 4206 * Assumption made here: Caller has done a 4207 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4208 * address does not exist already. 4209 */ 4210 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4211 /* Hit max assoc, sorry no more */ 4212 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4213 *error = ENOBUFS; 4214 return (NULL); 4215 } 4216 if (firstaddr == NULL) { 4217 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4218 *error = EINVAL; 4219 return (NULL); 4220 } 4221 SCTP_INP_RLOCK(inp); 4222 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4223 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4224 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4225 /* 4226 * If its in the TCP pool, its NOT allowed to create an 4227 * association. The parent listener needs to call 4228 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4229 * off, or connected one does this.. its an error. 4230 */ 4231 SCTP_INP_RUNLOCK(inp); 4232 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4233 *error = EINVAL; 4234 return (NULL); 4235 } 4236 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4237 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4238 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4239 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4240 SCTP_INP_RUNLOCK(inp); 4241 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4242 *error = EINVAL; 4243 return (NULL); 4244 } 4245 } 4246 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4247 #ifdef SCTP_DEBUG 4248 if (firstaddr) { 4249 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4250 switch (firstaddr->sa_family) { 4251 #ifdef INET 4252 case AF_INET: 4253 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4254 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4255 break; 4256 #endif 4257 #ifdef INET6 4258 case AF_INET6: 4259 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4260 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4261 break; 4262 #endif 4263 default: 4264 break; 4265 } 4266 } else { 4267 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4268 } 4269 #endif /* SCTP_DEBUG */ 4270 switch (firstaddr->sa_family) { 4271 #ifdef INET 4272 case AF_INET: 4273 { 4274 struct sockaddr_in *sin; 4275 4276 sin = (struct sockaddr_in *)firstaddr; 4277 if ((ntohs(sin->sin_port) == 0) || 4278 (sin->sin_addr.s_addr == INADDR_ANY) || 4279 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4280 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4281 /* Invalid address */ 4282 SCTP_INP_RUNLOCK(inp); 4283 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4284 *error = EINVAL; 4285 return (NULL); 4286 } 4287 rport = sin->sin_port; 4288 break; 4289 } 4290 #endif 4291 #ifdef INET6 4292 case AF_INET6: 4293 { 4294 struct sockaddr_in6 *sin6; 4295 4296 sin6 = (struct sockaddr_in6 *)firstaddr; 4297 if ((ntohs(sin6->sin6_port) == 0) || 4298 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4299 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4300 /* Invalid address */ 4301 SCTP_INP_RUNLOCK(inp); 4302 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4303 *error = EINVAL; 4304 return (NULL); 4305 } 4306 rport = sin6->sin6_port; 4307 break; 4308 } 4309 #endif 4310 default: 4311 /* not supported family type */ 4312 SCTP_INP_RUNLOCK(inp); 4313 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4314 *error = EINVAL; 4315 return (NULL); 4316 } 4317 SCTP_INP_RUNLOCK(inp); 4318 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4319 /* 4320 * If you have not performed a bind, then we need to do the 4321 * ephemeral bind for you. 4322 */ 4323 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4324 (struct sockaddr *)NULL, 4325 (struct sctp_ifa *)NULL, 4326 p 4327 ))) { 4328 /* bind error, probably perm */ 4329 *error = err; 4330 return (NULL); 4331 } 4332 } 4333 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4334 if (stcb == NULL) { 4335 /* out of memory? */ 4336 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4337 *error = ENOMEM; 4338 return (NULL); 4339 } 4340 SCTP_INCR_ASOC_COUNT(); 4341 4342 bzero(stcb, sizeof(*stcb)); 4343 asoc = &stcb->asoc; 4344 4345 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4346 SCTP_TCB_LOCK_INIT(stcb); 4347 SCTP_TCB_SEND_LOCK_INIT(stcb); 4348 stcb->rport = rport; 4349 /* setup back pointer's */ 4350 stcb->sctp_ep = inp; 4351 stcb->sctp_socket = inp->sctp_socket; 4352 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4353 /* failed */ 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_DECR_ASOC_COUNT(); 4359 *error = err; 4360 return (NULL); 4361 } 4362 /* and the port */ 4363 SCTP_INP_INFO_WLOCK(); 4364 SCTP_INP_WLOCK(inp); 4365 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4366 /* inpcb freed while alloc going on */ 4367 SCTP_TCB_LOCK_DESTROY(stcb); 4368 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4369 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4370 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4371 SCTP_INP_WUNLOCK(inp); 4372 SCTP_INP_INFO_WUNLOCK(); 4373 SCTP_DECR_ASOC_COUNT(); 4374 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4375 *error = EINVAL; 4376 return (NULL); 4377 } 4378 SCTP_TCB_LOCK(stcb); 4379 4380 /* now that my_vtag is set, add it to the hash */ 4381 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4382 /* put it in the bucket in the vtag hash of assoc's for the system */ 4383 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4384 SCTP_INP_INFO_WUNLOCK(); 4385 4386 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4387 /* failure.. memory error? */ 4388 if (asoc->strmout) { 4389 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4390 asoc->strmout = NULL; 4391 } 4392 if (asoc->mapping_array) { 4393 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4394 asoc->mapping_array = NULL; 4395 } 4396 if (asoc->nr_mapping_array) { 4397 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4398 asoc->nr_mapping_array = NULL; 4399 } 4400 SCTP_DECR_ASOC_COUNT(); 4401 SCTP_TCB_UNLOCK(stcb); 4402 SCTP_TCB_LOCK_DESTROY(stcb); 4403 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4404 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4405 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4406 SCTP_INP_WUNLOCK(inp); 4407 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4408 *error = ENOBUFS; 4409 return (NULL); 4410 } 4411 /* Init all the timers */ 4412 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4413 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4414 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4415 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4416 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4417 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4418 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4419 4420 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4421 /* now file the port under the hash as well */ 4422 if (inp->sctp_tcbhash != NULL) { 4423 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4424 inp->sctp_hashmark)]; 4425 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4426 } 4427 SCTP_INP_WUNLOCK(inp); 4428 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4429 return (stcb); 4430 } 4431 4432 4433 void 4434 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4435 { 4436 struct sctp_association *asoc; 4437 4438 asoc = &stcb->asoc; 4439 asoc->numnets--; 4440 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4441 if (net == asoc->primary_destination) { 4442 /* Reset primary */ 4443 struct sctp_nets *lnet; 4444 4445 lnet = TAILQ_FIRST(&asoc->nets); 4446 /* 4447 * Mobility adaptation Ideally, if deleted destination is 4448 * the primary, it becomes a fast retransmission trigger by 4449 * the subsequent SET PRIMARY. (by micchie) 4450 */ 4451 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4452 SCTP_MOBILITY_BASE) || 4453 sctp_is_mobility_feature_on(stcb->sctp_ep, 4454 SCTP_MOBILITY_FASTHANDOFF)) { 4455 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4456 if (asoc->deleted_primary != NULL) { 4457 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4458 goto out; 4459 } 4460 asoc->deleted_primary = net; 4461 atomic_add_int(&net->ref_count, 1); 4462 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4463 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4464 sctp_mobility_feature_on(stcb->sctp_ep, 4465 SCTP_MOBILITY_PRIM_DELETED); 4466 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4467 stcb->sctp_ep, stcb, NULL); 4468 } 4469 out: 4470 /* Try to find a confirmed primary */ 4471 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4472 } 4473 if (net == asoc->last_data_chunk_from) { 4474 /* Reset primary */ 4475 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4476 } 4477 if (net == asoc->last_control_chunk_from) { 4478 /* Clear net */ 4479 asoc->last_control_chunk_from = NULL; 4480 } 4481 if (net == stcb->asoc.alternate) { 4482 sctp_free_remote_addr(stcb->asoc.alternate); 4483 stcb->asoc.alternate = NULL; 4484 } 4485 sctp_free_remote_addr(net); 4486 } 4487 4488 /* 4489 * remove a remote endpoint address from an association, it will fail if the 4490 * address does not exist. 4491 */ 4492 int 4493 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4494 { 4495 /* 4496 * Here we need to remove a remote address. This is quite simple, we 4497 * first find it in the list of address for the association 4498 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4499 * on that item. Note we do not allow it to be removed if there are 4500 * no other addresses. 4501 */ 4502 struct sctp_association *asoc; 4503 struct sctp_nets *net, *nnet; 4504 4505 asoc = &stcb->asoc; 4506 4507 /* locate the address */ 4508 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4509 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4510 continue; 4511 } 4512 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4513 remaddr)) { 4514 /* we found the guy */ 4515 if (asoc->numnets < 2) { 4516 /* Must have at LEAST two remote addresses */ 4517 return (-1); 4518 } else { 4519 sctp_remove_net(stcb, net); 4520 return (0); 4521 } 4522 } 4523 } 4524 /* not found. */ 4525 return (-2); 4526 } 4527 4528 void 4529 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4530 { 4531 struct sctpvtaghead *chain; 4532 struct sctp_tagblock *twait_block; 4533 int found = 0; 4534 int i; 4535 4536 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4537 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4538 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4539 if ((twait_block->vtag_block[i].v_tag == tag) && 4540 (twait_block->vtag_block[i].lport == lport) && 4541 (twait_block->vtag_block[i].rport == rport)) { 4542 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4543 twait_block->vtag_block[i].v_tag = 0; 4544 twait_block->vtag_block[i].lport = 0; 4545 twait_block->vtag_block[i].rport = 0; 4546 found = 1; 4547 break; 4548 } 4549 } 4550 if (found) 4551 break; 4552 } 4553 } 4554 4555 int 4556 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4557 { 4558 struct sctpvtaghead *chain; 4559 struct sctp_tagblock *twait_block; 4560 int found = 0; 4561 int i; 4562 4563 SCTP_INP_INFO_WLOCK(); 4564 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4565 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4566 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4567 if ((twait_block->vtag_block[i].v_tag == tag) && 4568 (twait_block->vtag_block[i].lport == lport) && 4569 (twait_block->vtag_block[i].rport == rport)) { 4570 found = 1; 4571 break; 4572 } 4573 } 4574 if (found) 4575 break; 4576 } 4577 SCTP_INP_INFO_WUNLOCK(); 4578 return (found); 4579 } 4580 4581 4582 void 4583 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4584 { 4585 struct sctpvtaghead *chain; 4586 struct sctp_tagblock *twait_block; 4587 struct timeval now; 4588 int set, i; 4589 4590 if (time == 0) { 4591 /* Its disabled */ 4592 return; 4593 } 4594 (void)SCTP_GETTIME_TIMEVAL(&now); 4595 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4596 set = 0; 4597 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4598 /* Block(s) present, lets find space, and expire on the fly */ 4599 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4600 if ((twait_block->vtag_block[i].v_tag == 0) && 4601 !set) { 4602 twait_block->vtag_block[i].tv_sec_at_expire = 4603 now.tv_sec + time; 4604 twait_block->vtag_block[i].v_tag = tag; 4605 twait_block->vtag_block[i].lport = lport; 4606 twait_block->vtag_block[i].rport = rport; 4607 set = 1; 4608 } else if ((twait_block->vtag_block[i].v_tag) && 4609 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4610 /* Audit expires this guy */ 4611 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4612 twait_block->vtag_block[i].v_tag = 0; 4613 twait_block->vtag_block[i].lport = 0; 4614 twait_block->vtag_block[i].rport = 0; 4615 if (set == 0) { 4616 /* Reuse it for my new tag */ 4617 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4618 twait_block->vtag_block[i].v_tag = tag; 4619 twait_block->vtag_block[i].lport = lport; 4620 twait_block->vtag_block[i].rport = rport; 4621 set = 1; 4622 } 4623 } 4624 } 4625 if (set) { 4626 /* 4627 * We only do up to the block where we can place our 4628 * tag for audits 4629 */ 4630 break; 4631 } 4632 } 4633 /* Need to add a new block to chain */ 4634 if (!set) { 4635 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4636 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4637 if (twait_block == NULL) { 4638 #ifdef INVARIANTS 4639 panic("Can not alloc tagblock"); 4640 #endif 4641 return; 4642 } 4643 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4644 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4645 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4646 twait_block->vtag_block[0].v_tag = tag; 4647 twait_block->vtag_block[0].lport = lport; 4648 twait_block->vtag_block[0].rport = rport; 4649 } 4650 } 4651 4652 4653 4654 /*- 4655 * Free the association after un-hashing the remote port. This 4656 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4657 * expect that the input to this function IS a locked TCB. 4658 * It will return 0, if it did NOT destroy the association (instead 4659 * it unlocks it. It will return NON-zero if it either destroyed the 4660 * association OR the association is already destroyed. 4661 */ 4662 int 4663 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4664 { 4665 int i; 4666 struct sctp_association *asoc; 4667 struct sctp_nets *net, *nnet; 4668 struct sctp_laddr *laddr, *naddr; 4669 struct sctp_tmit_chunk *chk, *nchk; 4670 struct sctp_asconf_addr *aparam, *naparam; 4671 struct sctp_asconf_ack *aack, *naack; 4672 struct sctp_stream_reset_list *strrst, *nstrrst; 4673 struct sctp_queued_to_read *sq, *nsq; 4674 struct sctp_stream_queue_pending *sp, *nsp; 4675 sctp_sharedkey_t *shared_key, *nshared_key; 4676 struct socket *so; 4677 4678 /* first, lets purge the entry from the hash table. */ 4679 4680 #ifdef SCTP_LOG_CLOSING 4681 sctp_log_closing(inp, stcb, 6); 4682 #endif 4683 if (stcb->asoc.state == 0) { 4684 #ifdef SCTP_LOG_CLOSING 4685 sctp_log_closing(inp, NULL, 7); 4686 #endif 4687 /* there is no asoc, really TSNH :-0 */ 4688 return (1); 4689 } 4690 if (stcb->asoc.alternate) { 4691 sctp_free_remote_addr(stcb->asoc.alternate); 4692 stcb->asoc.alternate = NULL; 4693 } 4694 /* TEMP CODE */ 4695 if (stcb->freed_from_where == 0) { 4696 /* Only record the first place free happened from */ 4697 stcb->freed_from_where = from_location; 4698 } 4699 /* TEMP CODE */ 4700 4701 asoc = &stcb->asoc; 4702 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4703 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4704 /* nothing around */ 4705 so = NULL; 4706 else 4707 so = inp->sctp_socket; 4708 4709 /* 4710 * We used timer based freeing if a reader or writer is in the way. 4711 * So we first check if we are actually being called from a timer, 4712 * if so we abort early if a reader or writer is still in the way. 4713 */ 4714 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4715 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4716 /* 4717 * is it the timer driving us? if so are the reader/writers 4718 * gone? 4719 */ 4720 if (stcb->asoc.refcnt) { 4721 /* nope, reader or writer in the way */ 4722 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4723 /* no asoc destroyed */ 4724 SCTP_TCB_UNLOCK(stcb); 4725 #ifdef SCTP_LOG_CLOSING 4726 sctp_log_closing(inp, stcb, 8); 4727 #endif 4728 return (0); 4729 } 4730 } 4731 /* now clean up any other timers */ 4732 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4733 asoc->dack_timer.self = NULL; 4734 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4735 /*- 4736 * For stream reset we don't blast this unless 4737 * it is a str-reset timer, it might be the 4738 * free-asoc timer which we DON'T want to 4739 * disturb. 4740 */ 4741 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4742 asoc->strreset_timer.self = NULL; 4743 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4744 asoc->asconf_timer.self = NULL; 4745 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4746 asoc->autoclose_timer.self = NULL; 4747 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4748 asoc->shut_guard_timer.self = NULL; 4749 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4750 asoc->delayed_event_timer.self = NULL; 4751 /* Mobility adaptation */ 4752 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4753 asoc->delete_prim_timer.self = NULL; 4754 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4755 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4756 net->rxt_timer.self = NULL; 4757 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4758 net->pmtu_timer.self = NULL; 4759 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4760 net->hb_timer.self = NULL; 4761 } 4762 /* Now the read queue needs to be cleaned up (only once) */ 4763 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4764 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4765 SCTP_INP_READ_LOCK(inp); 4766 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4767 if (sq->stcb == stcb) { 4768 sq->do_not_ref_stcb = 1; 4769 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4770 /* 4771 * If there is no end, there never will be 4772 * now. 4773 */ 4774 if (sq->end_added == 0) { 4775 /* Held for PD-API clear that. */ 4776 sq->pdapi_aborted = 1; 4777 sq->held_length = 0; 4778 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4779 /* 4780 * Need to add a PD-API 4781 * aborted indication. 4782 * Setting the control_pdapi 4783 * assures that it will be 4784 * added right after this 4785 * msg. 4786 */ 4787 uint32_t strseq; 4788 4789 stcb->asoc.control_pdapi = sq; 4790 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4791 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4792 stcb, 4793 SCTP_PARTIAL_DELIVERY_ABORTED, 4794 (void *)&strseq, 4795 SCTP_SO_LOCKED); 4796 stcb->asoc.control_pdapi = NULL; 4797 } 4798 } 4799 /* Add an end to wake them */ 4800 sq->end_added = 1; 4801 } 4802 } 4803 SCTP_INP_READ_UNLOCK(inp); 4804 if (stcb->block_entry) { 4805 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4806 stcb->block_entry->error = ECONNRESET; 4807 stcb->block_entry = NULL; 4808 } 4809 } 4810 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4811 /* 4812 * Someone holds a reference OR the socket is unaccepted 4813 * yet. 4814 */ 4815 if ((stcb->asoc.refcnt) || 4816 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4817 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4818 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4819 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4820 } 4821 SCTP_TCB_UNLOCK(stcb); 4822 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4823 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4824 /* nothing around */ 4825 so = NULL; 4826 if (so) { 4827 /* Wake any reader/writers */ 4828 sctp_sorwakeup(inp, so); 4829 sctp_sowwakeup(inp, so); 4830 } 4831 #ifdef SCTP_LOG_CLOSING 4832 sctp_log_closing(inp, stcb, 9); 4833 #endif 4834 /* no asoc destroyed */ 4835 return (0); 4836 } 4837 #ifdef SCTP_LOG_CLOSING 4838 sctp_log_closing(inp, stcb, 10); 4839 #endif 4840 /* 4841 * When I reach here, no others want to kill the assoc yet.. and I 4842 * own the lock. Now its possible an abort comes in when I do the 4843 * lock exchange below to grab all the locks to do the final take 4844 * out. to prevent this we increment the count, which will start a 4845 * timer and blow out above thus assuring us that we hold exclusive 4846 * killing of the asoc. Note that after getting back the TCB lock we 4847 * will go ahead and increment the counter back up and stop any 4848 * timer a passing stranger may have started :-S 4849 */ 4850 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4851 atomic_add_int(&stcb->asoc.refcnt, 1); 4852 4853 SCTP_TCB_UNLOCK(stcb); 4854 SCTP_INP_INFO_WLOCK(); 4855 SCTP_INP_WLOCK(inp); 4856 SCTP_TCB_LOCK(stcb); 4857 } 4858 /* Double check the GONE flag */ 4859 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4860 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4861 /* nothing around */ 4862 so = NULL; 4863 4864 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4865 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4866 /* 4867 * For TCP type we need special handling when we are 4868 * connected. We also include the peel'ed off ones to. 4869 */ 4870 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4871 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4872 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4873 if (so) { 4874 SOCK_LOCK(so); 4875 if (so->so_rcv.sb_cc == 0) { 4876 so->so_state &= ~(SS_ISCONNECTING | 4877 SS_ISDISCONNECTING | 4878 SS_ISCONFIRMING | 4879 SS_ISCONNECTED); 4880 } 4881 socantrcvmore_locked(so); 4882 sctp_sowwakeup(inp, so); 4883 sctp_sorwakeup(inp, so); 4884 SCTP_SOWAKEUP(so); 4885 } 4886 } 4887 } 4888 /* 4889 * Make it invalid too, that way if its about to run it will abort 4890 * and return. 4891 */ 4892 /* re-increment the lock */ 4893 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4894 atomic_add_int(&stcb->asoc.refcnt, -1); 4895 } 4896 if (stcb->asoc.refcnt) { 4897 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4898 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4899 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4900 SCTP_INP_INFO_WUNLOCK(); 4901 SCTP_INP_WUNLOCK(inp); 4902 } 4903 SCTP_TCB_UNLOCK(stcb); 4904 return (0); 4905 } 4906 asoc->state = 0; 4907 if (inp->sctp_tcbhash) { 4908 LIST_REMOVE(stcb, sctp_tcbhash); 4909 } 4910 if (stcb->asoc.in_asocid_hash) { 4911 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4912 } 4913 /* Now lets remove it from the list of ALL associations in the EP */ 4914 LIST_REMOVE(stcb, sctp_tcblist); 4915 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4916 SCTP_INP_INCR_REF(inp); 4917 SCTP_INP_WUNLOCK(inp); 4918 } 4919 /* pull from vtag hash */ 4920 LIST_REMOVE(stcb, sctp_asocs); 4921 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4922 inp->sctp_lport, stcb->rport); 4923 4924 /* 4925 * Now restop the timers to be sure this is paranoia at is finest! 4926 */ 4927 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4928 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4929 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4930 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4931 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4932 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4933 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4934 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4935 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4936 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4937 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4938 } 4939 4940 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4941 /* 4942 * The chunk lists and such SHOULD be empty but we check them just 4943 * in case. 4944 */ 4945 /* anything on the wheel needs to be removed */ 4946 for (i = 0; i < asoc->streamoutcnt; i++) { 4947 struct sctp_stream_out *outs; 4948 4949 outs = &asoc->strmout[i]; 4950 /* now clean up any chunks here */ 4951 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4952 TAILQ_REMOVE(&outs->outqueue, sp, next); 4953 sctp_free_spbufspace(stcb, asoc, sp); 4954 if (sp->data) { 4955 if (so) { 4956 /* Still an open socket - report */ 4957 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4958 0, (void *)sp, SCTP_SO_LOCKED); 4959 } 4960 if (sp->data) { 4961 sctp_m_freem(sp->data); 4962 sp->data = NULL; 4963 sp->tail_mbuf = NULL; 4964 sp->length = 0; 4965 } 4966 } 4967 if (sp->net) { 4968 sctp_free_remote_addr(sp->net); 4969 sp->net = NULL; 4970 } 4971 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4972 } 4973 } 4974 /* sa_ignore FREED_MEMORY */ 4975 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4976 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4977 SCTP_FREE(strrst, SCTP_M_STRESET); 4978 } 4979 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4980 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4981 if (sq->data) { 4982 sctp_m_freem(sq->data); 4983 sq->data = NULL; 4984 } 4985 sctp_free_remote_addr(sq->whoFrom); 4986 sq->whoFrom = NULL; 4987 sq->stcb = NULL; 4988 /* Free the ctl entry */ 4989 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4990 SCTP_DECR_READQ_COUNT(); 4991 /* sa_ignore FREED_MEMORY */ 4992 } 4993 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4994 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4995 if (chk->data) { 4996 sctp_m_freem(chk->data); 4997 chk->data = NULL; 4998 } 4999 if (chk->holds_key_ref) 5000 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5001 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5002 SCTP_DECR_CHK_COUNT(); 5003 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5004 asoc->free_chunk_cnt--; 5005 /* sa_ignore FREED_MEMORY */ 5006 } 5007 /* pending send queue SHOULD be empty */ 5008 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5009 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5010 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5011 #ifdef INVARIANTS 5012 } else { 5013 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5014 #endif 5015 } 5016 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5017 if (chk->data) { 5018 if (so) { 5019 /* Still a socket? */ 5020 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5021 0, chk, SCTP_SO_LOCKED); 5022 } 5023 if (chk->data) { 5024 sctp_m_freem(chk->data); 5025 chk->data = NULL; 5026 } 5027 } 5028 if (chk->holds_key_ref) 5029 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5030 if (chk->whoTo) { 5031 sctp_free_remote_addr(chk->whoTo); 5032 chk->whoTo = NULL; 5033 } 5034 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5035 SCTP_DECR_CHK_COUNT(); 5036 /* sa_ignore FREED_MEMORY */ 5037 } 5038 /* sent queue SHOULD be empty */ 5039 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5040 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5041 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5042 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5043 #ifdef INVARIANTS 5044 } else { 5045 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5046 #endif 5047 } 5048 } 5049 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5050 if (chk->data) { 5051 if (so) { 5052 /* Still a socket? */ 5053 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5054 0, chk, SCTP_SO_LOCKED); 5055 } 5056 if (chk->data) { 5057 sctp_m_freem(chk->data); 5058 chk->data = NULL; 5059 } 5060 } 5061 if (chk->holds_key_ref) 5062 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5063 sctp_free_remote_addr(chk->whoTo); 5064 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5065 SCTP_DECR_CHK_COUNT(); 5066 /* sa_ignore FREED_MEMORY */ 5067 } 5068 #ifdef INVARIANTS 5069 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5070 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5071 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5072 } 5073 } 5074 #endif 5075 /* control queue MAY not be empty */ 5076 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5077 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5078 if (chk->data) { 5079 sctp_m_freem(chk->data); 5080 chk->data = NULL; 5081 } 5082 if (chk->holds_key_ref) 5083 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5084 sctp_free_remote_addr(chk->whoTo); 5085 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5086 SCTP_DECR_CHK_COUNT(); 5087 /* sa_ignore FREED_MEMORY */ 5088 } 5089 /* ASCONF queue MAY not be empty */ 5090 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5091 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5092 if (chk->data) { 5093 sctp_m_freem(chk->data); 5094 chk->data = NULL; 5095 } 5096 if (chk->holds_key_ref) 5097 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5098 sctp_free_remote_addr(chk->whoTo); 5099 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5100 SCTP_DECR_CHK_COUNT(); 5101 /* sa_ignore FREED_MEMORY */ 5102 } 5103 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5104 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5105 if (chk->data) { 5106 sctp_m_freem(chk->data); 5107 chk->data = NULL; 5108 } 5109 if (chk->holds_key_ref) 5110 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5111 sctp_free_remote_addr(chk->whoTo); 5112 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5113 SCTP_DECR_CHK_COUNT(); 5114 /* sa_ignore FREED_MEMORY */ 5115 } 5116 5117 if (asoc->mapping_array) { 5118 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5119 asoc->mapping_array = NULL; 5120 } 5121 if (asoc->nr_mapping_array) { 5122 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5123 asoc->nr_mapping_array = NULL; 5124 } 5125 /* the stream outs */ 5126 if (asoc->strmout) { 5127 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5128 asoc->strmout = NULL; 5129 } 5130 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5131 if (asoc->strmin) { 5132 struct sctp_queued_to_read *ctl, *nctl; 5133 5134 for (i = 0; i < asoc->streamincnt; i++) { 5135 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5136 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5137 sctp_free_remote_addr(ctl->whoFrom); 5138 if (ctl->data) { 5139 sctp_m_freem(ctl->data); 5140 ctl->data = NULL; 5141 } 5142 /* 5143 * We don't free the address here since all 5144 * the net's were freed above. 5145 */ 5146 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5147 SCTP_DECR_READQ_COUNT(); 5148 } 5149 } 5150 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5151 asoc->strmin = NULL; 5152 } 5153 asoc->streamincnt = 0; 5154 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5155 #ifdef INVARIANTS 5156 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5157 panic("no net's left alloc'ed, or list points to itself"); 5158 } 5159 #endif 5160 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5161 sctp_free_remote_addr(net); 5162 } 5163 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5164 /* sa_ignore FREED_MEMORY */ 5165 sctp_remove_laddr(laddr); 5166 } 5167 5168 /* pending asconf (address) parameters */ 5169 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5170 /* sa_ignore FREED_MEMORY */ 5171 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5172 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5173 } 5174 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5175 /* sa_ignore FREED_MEMORY */ 5176 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5177 if (aack->data != NULL) { 5178 sctp_m_freem(aack->data); 5179 } 5180 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5181 } 5182 /* clean up auth stuff */ 5183 if (asoc->local_hmacs) 5184 sctp_free_hmaclist(asoc->local_hmacs); 5185 if (asoc->peer_hmacs) 5186 sctp_free_hmaclist(asoc->peer_hmacs); 5187 5188 if (asoc->local_auth_chunks) 5189 sctp_free_chunklist(asoc->local_auth_chunks); 5190 if (asoc->peer_auth_chunks) 5191 sctp_free_chunklist(asoc->peer_auth_chunks); 5192 5193 sctp_free_authinfo(&asoc->authinfo); 5194 5195 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5196 LIST_REMOVE(shared_key, next); 5197 sctp_free_sharedkey(shared_key); 5198 /* sa_ignore FREED_MEMORY */ 5199 } 5200 5201 /* Insert new items here :> */ 5202 5203 /* Get rid of LOCK */ 5204 SCTP_TCB_UNLOCK(stcb); 5205 SCTP_TCB_LOCK_DESTROY(stcb); 5206 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5207 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5208 SCTP_INP_INFO_WUNLOCK(); 5209 SCTP_INP_RLOCK(inp); 5210 } 5211 #ifdef SCTP_TRACK_FREED_ASOCS 5212 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5213 /* now clean up the tasoc itself */ 5214 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5215 SCTP_DECR_ASOC_COUNT(); 5216 } else { 5217 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5218 } 5219 #else 5220 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5221 SCTP_DECR_ASOC_COUNT(); 5222 #endif 5223 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5224 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5225 /* 5226 * If its NOT the inp_free calling us AND sctp_close 5227 * as been called, we call back... 5228 */ 5229 SCTP_INP_RUNLOCK(inp); 5230 /* 5231 * This will start the kill timer (if we are the 5232 * last one) since we hold an increment yet. But 5233 * this is the only safe way to do this since 5234 * otherwise if the socket closes at the same time 5235 * we are here we might collide in the cleanup. 5236 */ 5237 sctp_inpcb_free(inp, 5238 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5239 SCTP_CALLED_DIRECTLY_NOCMPSET); 5240 SCTP_INP_DECR_REF(inp); 5241 goto out_of; 5242 } else { 5243 /* The socket is still open. */ 5244 SCTP_INP_DECR_REF(inp); 5245 } 5246 } 5247 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5248 SCTP_INP_RUNLOCK(inp); 5249 } 5250 out_of: 5251 /* destroyed the asoc */ 5252 #ifdef SCTP_LOG_CLOSING 5253 sctp_log_closing(inp, NULL, 11); 5254 #endif 5255 return (1); 5256 } 5257 5258 5259 5260 /* 5261 * determine if a destination is "reachable" based upon the addresses bound 5262 * to the current endpoint (e.g. only v4 or v6 currently bound) 5263 */ 5264 /* 5265 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5266 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5267 * types bound as its endpoint 5268 */ 5269 int 5270 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5271 { 5272 struct sctp_inpcb *inp; 5273 int answer; 5274 5275 /* 5276 * No locks here, the TCB, in all cases is already locked and an 5277 * assoc is up. There is either a INP lock by the caller applied (in 5278 * asconf case when deleting an address) or NOT in the HB case, 5279 * however if HB then the INP increment is up and the INP will not 5280 * be removed (on top of the fact that we have a TCB lock). So we 5281 * only want to read the sctp_flags, which is either bound-all or 5282 * not.. no protection needed since once an assoc is up you can't be 5283 * changing your binding. 5284 */ 5285 inp = stcb->sctp_ep; 5286 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5287 /* if bound all, destination is not restricted */ 5288 /* 5289 * RRS: Question during lock work: Is this correct? If you 5290 * are bound-all you still might need to obey the V4--V6 5291 * flags??? IMO this bound-all stuff needs to be removed! 5292 */ 5293 return (1); 5294 } 5295 /* NOTE: all "scope" checks are done when local addresses are added */ 5296 switch (destaddr->sa_family) { 5297 #ifdef INET6 5298 case AF_INET6: 5299 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5300 break; 5301 #endif 5302 #ifdef INET 5303 case AF_INET: 5304 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5305 break; 5306 #endif 5307 default: 5308 /* invalid family, so it's unreachable */ 5309 answer = 0; 5310 break; 5311 } 5312 return (answer); 5313 } 5314 5315 /* 5316 * update the inp_vflags on an endpoint 5317 */ 5318 static void 5319 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5320 { 5321 struct sctp_laddr *laddr; 5322 5323 /* first clear the flag */ 5324 inp->ip_inp.inp.inp_vflag = 0; 5325 /* set the flag based on addresses on the ep list */ 5326 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5327 if (laddr->ifa == NULL) { 5328 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5329 __func__); 5330 continue; 5331 } 5332 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5333 continue; 5334 } 5335 switch (laddr->ifa->address.sa.sa_family) { 5336 #ifdef INET6 5337 case AF_INET6: 5338 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5339 break; 5340 #endif 5341 #ifdef INET 5342 case AF_INET: 5343 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5344 break; 5345 #endif 5346 default: 5347 break; 5348 } 5349 } 5350 } 5351 5352 /* 5353 * Add the address to the endpoint local address list There is nothing to be 5354 * done if we are bound to all addresses 5355 */ 5356 void 5357 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5358 { 5359 struct sctp_laddr *laddr; 5360 int fnd, error = 0; 5361 5362 fnd = 0; 5363 5364 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5365 /* You are already bound to all. You have it already */ 5366 return; 5367 } 5368 #ifdef INET6 5369 if (ifa->address.sa.sa_family == AF_INET6) { 5370 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5371 /* Can't bind a non-useable addr. */ 5372 return; 5373 } 5374 } 5375 #endif 5376 /* first, is it already present? */ 5377 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5378 if (laddr->ifa == ifa) { 5379 fnd = 1; 5380 break; 5381 } 5382 } 5383 5384 if (fnd == 0) { 5385 /* Not in the ep list */ 5386 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5387 if (error != 0) 5388 return; 5389 inp->laddr_count++; 5390 /* update inp_vflag flags */ 5391 switch (ifa->address.sa.sa_family) { 5392 #ifdef INET6 5393 case AF_INET6: 5394 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5395 break; 5396 #endif 5397 #ifdef INET 5398 case AF_INET: 5399 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5400 break; 5401 #endif 5402 default: 5403 break; 5404 } 5405 } 5406 return; 5407 } 5408 5409 5410 /* 5411 * select a new (hopefully reachable) destination net (should only be used 5412 * when we deleted an ep addr that is the only usable source address to reach 5413 * the destination net) 5414 */ 5415 static void 5416 sctp_select_primary_destination(struct sctp_tcb *stcb) 5417 { 5418 struct sctp_nets *net; 5419 5420 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5421 /* for now, we'll just pick the first reachable one we find */ 5422 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5423 continue; 5424 if (sctp_destination_is_reachable(stcb, 5425 (struct sockaddr *)&net->ro._l_addr)) { 5426 /* found a reachable destination */ 5427 stcb->asoc.primary_destination = net; 5428 } 5429 } 5430 /* I can't there from here! ...we're gonna die shortly... */ 5431 } 5432 5433 5434 /* 5435 * Delete the address from the endpoint local address list. There is nothing 5436 * to be done if we are bound to all addresses 5437 */ 5438 void 5439 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5440 { 5441 struct sctp_laddr *laddr; 5442 int fnd; 5443 5444 fnd = 0; 5445 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5446 /* You are already bound to all. You have it already */ 5447 return; 5448 } 5449 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5450 if (laddr->ifa == ifa) { 5451 fnd = 1; 5452 break; 5453 } 5454 } 5455 if (fnd && (inp->laddr_count < 2)) { 5456 /* can't delete unless there are at LEAST 2 addresses */ 5457 return; 5458 } 5459 if (fnd) { 5460 /* 5461 * clean up any use of this address go through our 5462 * associations and clear any last_used_address that match 5463 * this one for each assoc, see if a new primary_destination 5464 * is needed 5465 */ 5466 struct sctp_tcb *stcb; 5467 5468 /* clean up "next_addr_touse" */ 5469 if (inp->next_addr_touse == laddr) 5470 /* delete this address */ 5471 inp->next_addr_touse = NULL; 5472 5473 /* clean up "last_used_address" */ 5474 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5475 struct sctp_nets *net; 5476 5477 SCTP_TCB_LOCK(stcb); 5478 if (stcb->asoc.last_used_address == laddr) 5479 /* delete this address */ 5480 stcb->asoc.last_used_address = NULL; 5481 /* 5482 * Now spin through all the nets and purge any ref 5483 * to laddr 5484 */ 5485 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5486 if (net->ro._s_addr == laddr->ifa) { 5487 /* Yep, purge src address selected */ 5488 sctp_rtentry_t *rt; 5489 5490 /* delete this address if cached */ 5491 rt = net->ro.ro_rt; 5492 if (rt != NULL) { 5493 RTFREE(rt); 5494 net->ro.ro_rt = NULL; 5495 } 5496 sctp_free_ifa(net->ro._s_addr); 5497 net->ro._s_addr = NULL; 5498 net->src_addr_selected = 0; 5499 } 5500 } 5501 SCTP_TCB_UNLOCK(stcb); 5502 } /* for each tcb */ 5503 /* remove it from the ep list */ 5504 sctp_remove_laddr(laddr); 5505 inp->laddr_count--; 5506 /* update inp_vflag flags */ 5507 sctp_update_ep_vflag(inp); 5508 } 5509 return; 5510 } 5511 5512 /* 5513 * Add the address to the TCB local address restricted list. 5514 * This is a "pending" address list (eg. addresses waiting for an 5515 * ASCONF-ACK response) and cannot be used as a valid source address. 5516 */ 5517 void 5518 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5519 { 5520 struct sctp_laddr *laddr; 5521 struct sctpladdr *list; 5522 5523 /* 5524 * Assumes TCB is locked.. and possibly the INP. May need to 5525 * confirm/fix that if we need it and is not the case. 5526 */ 5527 list = &stcb->asoc.sctp_restricted_addrs; 5528 5529 #ifdef INET6 5530 if (ifa->address.sa.sa_family == AF_INET6) { 5531 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5532 /* Can't bind a non-existent addr. */ 5533 return; 5534 } 5535 } 5536 #endif 5537 /* does the address already exist? */ 5538 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5539 if (laddr->ifa == ifa) { 5540 return; 5541 } 5542 } 5543 5544 /* add to the list */ 5545 (void)sctp_insert_laddr(list, ifa, 0); 5546 return; 5547 } 5548 5549 /* 5550 * Remove a local address from the TCB local address restricted list 5551 */ 5552 void 5553 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5554 { 5555 struct sctp_inpcb *inp; 5556 struct sctp_laddr *laddr; 5557 5558 /* 5559 * This is called by asconf work. It is assumed that a) The TCB is 5560 * locked and b) The INP is locked. This is true in as much as I can 5561 * trace through the entry asconf code where I did these locks. 5562 * Again, the ASCONF code is a bit different in that it does lock 5563 * the INP during its work often times. This must be since we don't 5564 * want other proc's looking up things while what they are looking 5565 * up is changing :-D 5566 */ 5567 5568 inp = stcb->sctp_ep; 5569 /* if subset bound and don't allow ASCONF's, can't delete last */ 5570 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5571 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5572 if (stcb->sctp_ep->laddr_count < 2) { 5573 /* can't delete last address */ 5574 return; 5575 } 5576 } 5577 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5578 /* remove the address if it exists */ 5579 if (laddr->ifa == NULL) 5580 continue; 5581 if (laddr->ifa == ifa) { 5582 sctp_remove_laddr(laddr); 5583 return; 5584 } 5585 } 5586 5587 /* address not found! */ 5588 return; 5589 } 5590 5591 /* 5592 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5593 */ 5594 /* sysctl */ 5595 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5596 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5597 5598 5599 5600 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5601 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5602 int *sctp_cpuarry = NULL; 5603 void 5604 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5605 { 5606 /* Queue a packet to a processor for the specified core */ 5607 struct sctp_mcore_queue *qent; 5608 struct sctp_mcore_ctrl *wkq; 5609 int need_wake = 0; 5610 5611 if (sctp_mcore_workers == NULL) { 5612 /* Something went way bad during setup */ 5613 sctp_input_with_port(m, off, 0); 5614 return; 5615 } 5616 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5617 (sizeof(struct sctp_mcore_queue)), 5618 SCTP_M_MCORE); 5619 if (qent == NULL) { 5620 /* This is trouble */ 5621 sctp_input_with_port(m, off, 0); 5622 return; 5623 } 5624 qent->vn = curvnet; 5625 qent->m = m; 5626 qent->off = off; 5627 qent->v6 = 0; 5628 wkq = &sctp_mcore_workers[cpu_to_use]; 5629 SCTP_MCORE_QLOCK(wkq); 5630 5631 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5632 if (wkq->running == 0) { 5633 need_wake = 1; 5634 } 5635 SCTP_MCORE_QUNLOCK(wkq); 5636 if (need_wake) { 5637 wakeup(&wkq->running); 5638 } 5639 } 5640 5641 static void 5642 sctp_mcore_thread(void *arg) 5643 { 5644 5645 struct sctp_mcore_ctrl *wkq; 5646 struct sctp_mcore_queue *qent; 5647 5648 wkq = (struct sctp_mcore_ctrl *)arg; 5649 struct mbuf *m; 5650 int off, v6; 5651 5652 /* Wait for first tickle */ 5653 SCTP_MCORE_LOCK(wkq); 5654 wkq->running = 0; 5655 msleep(&wkq->running, 5656 &wkq->core_mtx, 5657 0, "wait for pkt", 0); 5658 SCTP_MCORE_UNLOCK(wkq); 5659 5660 /* Bind to our cpu */ 5661 thread_lock(curthread); 5662 sched_bind(curthread, wkq->cpuid); 5663 thread_unlock(curthread); 5664 5665 /* Now lets start working */ 5666 SCTP_MCORE_LOCK(wkq); 5667 /* Now grab lock and go */ 5668 for (;;) { 5669 SCTP_MCORE_QLOCK(wkq); 5670 skip_sleep: 5671 wkq->running = 1; 5672 qent = TAILQ_FIRST(&wkq->que); 5673 if (qent) { 5674 TAILQ_REMOVE(&wkq->que, qent, next); 5675 SCTP_MCORE_QUNLOCK(wkq); 5676 CURVNET_SET(qent->vn); 5677 m = qent->m; 5678 off = qent->off; 5679 v6 = qent->v6; 5680 SCTP_FREE(qent, SCTP_M_MCORE); 5681 if (v6 == 0) { 5682 sctp_input_with_port(m, off, 0); 5683 } else { 5684 SCTP_PRINTF("V6 not yet supported\n"); 5685 sctp_m_freem(m); 5686 } 5687 CURVNET_RESTORE(); 5688 SCTP_MCORE_QLOCK(wkq); 5689 } 5690 wkq->running = 0; 5691 if (!TAILQ_EMPTY(&wkq->que)) { 5692 goto skip_sleep; 5693 } 5694 SCTP_MCORE_QUNLOCK(wkq); 5695 msleep(&wkq->running, 5696 &wkq->core_mtx, 5697 0, "wait for pkt", 0); 5698 } 5699 } 5700 5701 static void 5702 sctp_startup_mcore_threads(void) 5703 { 5704 int i, cpu; 5705 5706 if (mp_ncpus == 1) 5707 return; 5708 5709 if (sctp_mcore_workers != NULL) { 5710 /* 5711 * Already been here in some previous vnet? 5712 */ 5713 return; 5714 } 5715 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5716 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5717 SCTP_M_MCORE); 5718 if (sctp_mcore_workers == NULL) { 5719 /* TSNH I hope */ 5720 return; 5721 } 5722 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5723 sizeof(struct sctp_mcore_ctrl))); 5724 /* Init the structures */ 5725 for (i = 0; i <= mp_maxid; i++) { 5726 TAILQ_INIT(&sctp_mcore_workers[i].que); 5727 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5728 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5729 sctp_mcore_workers[i].cpuid = i; 5730 } 5731 if (sctp_cpuarry == NULL) { 5732 SCTP_MALLOC(sctp_cpuarry, int *, 5733 (mp_ncpus * sizeof(int)), 5734 SCTP_M_MCORE); 5735 i = 0; 5736 CPU_FOREACH(cpu) { 5737 sctp_cpuarry[i] = cpu; 5738 i++; 5739 } 5740 } 5741 /* Now start them all */ 5742 CPU_FOREACH(cpu) { 5743 (void)kproc_create(sctp_mcore_thread, 5744 (void *)&sctp_mcore_workers[cpu], 5745 &sctp_mcore_workers[cpu].thread_proc, 5746 RFPROC, 5747 SCTP_KTHREAD_PAGES, 5748 SCTP_MCORE_NAME); 5749 5750 } 5751 } 5752 5753 #endif 5754 5755 void 5756 sctp_pcb_init() 5757 { 5758 /* 5759 * SCTP initialization for the PCB structures should be called by 5760 * the sctp_init() funciton. 5761 */ 5762 int i; 5763 struct timeval tv; 5764 5765 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5766 /* error I was called twice */ 5767 return; 5768 } 5769 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5770 5771 #if defined(SCTP_LOCAL_TRACE_BUF) 5772 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5773 #endif 5774 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5775 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5776 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5777 SCTP_M_MCORE); 5778 #endif 5779 (void)SCTP_GETTIME_TIMEVAL(&tv); 5780 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5781 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5782 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5783 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5784 #else 5785 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5786 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5787 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5788 #endif 5789 /* init the empty list of (All) Endpoints */ 5790 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5791 5792 5793 /* init the hash table of endpoints */ 5794 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5795 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5796 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5797 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5798 &SCTP_BASE_INFO(hashasocmark)); 5799 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5800 &SCTP_BASE_INFO(hashmark)); 5801 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5802 &SCTP_BASE_INFO(hashtcpmark)); 5803 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5804 5805 5806 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5807 &SCTP_BASE_INFO(hashvrfmark)); 5808 5809 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5810 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5811 /* init the zones */ 5812 /* 5813 * FIX ME: Should check for NULL returns, but if it does fail we are 5814 * doomed to panic anyways... add later maybe. 5815 */ 5816 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5817 sizeof(struct sctp_inpcb), maxsockets); 5818 5819 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5820 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5821 5822 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5823 sizeof(struct sctp_laddr), 5824 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5825 5826 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5827 sizeof(struct sctp_nets), 5828 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5829 5830 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5831 sizeof(struct sctp_tmit_chunk), 5832 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5833 5834 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5835 sizeof(struct sctp_queued_to_read), 5836 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5837 5838 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5839 sizeof(struct sctp_stream_queue_pending), 5840 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5841 5842 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5843 sizeof(struct sctp_asconf), 5844 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5845 5846 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5847 sizeof(struct sctp_asconf_ack), 5848 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5849 5850 5851 /* Master Lock INIT for info structure */ 5852 SCTP_INP_INFO_LOCK_INIT(); 5853 SCTP_STATLOG_INIT_LOCK(); 5854 5855 SCTP_IPI_COUNT_INIT(); 5856 SCTP_IPI_ADDR_INIT(); 5857 #ifdef SCTP_PACKET_LOGGING 5858 SCTP_IP_PKTLOG_INIT(); 5859 #endif 5860 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5861 5862 SCTP_WQ_ADDR_INIT(); 5863 /* not sure if we need all the counts */ 5864 SCTP_BASE_INFO(ipi_count_ep) = 0; 5865 /* assoc/tcb zone info */ 5866 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5867 /* local addrlist zone info */ 5868 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5869 /* remote addrlist zone info */ 5870 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5871 /* chunk info */ 5872 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5873 5874 /* socket queue zone info */ 5875 SCTP_BASE_INFO(ipi_count_readq) = 0; 5876 5877 /* stream out queue cont */ 5878 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5879 5880 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5881 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5882 5883 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5884 5885 /* Init the TIMEWAIT list */ 5886 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5887 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5888 } 5889 sctp_startup_iterator(); 5890 5891 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5892 sctp_startup_mcore_threads(); 5893 #endif 5894 5895 /* 5896 * INIT the default VRF which for BSD is the only one, other O/S's 5897 * may have more. But initially they must start with one and then 5898 * add the VRF's as addresses are added. 5899 */ 5900 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5901 } 5902 5903 /* 5904 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5905 */ 5906 void 5907 sctp_pcb_finish(void) 5908 { 5909 struct sctp_vrflist *vrf_bucket; 5910 struct sctp_vrf *vrf, *nvrf; 5911 struct sctp_ifn *ifn, *nifn; 5912 struct sctp_ifa *ifa, *nifa; 5913 struct sctpvtaghead *chain; 5914 struct sctp_tagblock *twait_block, *prev_twait_block; 5915 struct sctp_laddr *wi, *nwi; 5916 int i; 5917 struct sctp_iterator *it, *nit; 5918 5919 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5920 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5921 return; 5922 } 5923 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5924 /* 5925 * In FreeBSD the iterator thread never exits but we do clean up. 5926 * The only way FreeBSD reaches here is if we have VRF's but we 5927 * still add the ifdef to make it compile on old versions. 5928 */ 5929 retry: 5930 SCTP_IPI_ITERATOR_WQ_LOCK(); 5931 /* 5932 * sctp_iterator_worker() might be working on an it entry without 5933 * holding the lock. We won't find it on the list either and 5934 * continue and free/destroy it. While holding the lock, spin, to 5935 * avoid the race condition as sctp_iterator_worker() will have to 5936 * wait to re-aquire the lock. 5937 */ 5938 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5939 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5940 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5941 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5942 DELAY(10); 5943 goto retry; 5944 } 5945 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5946 if (it->vn != curvnet) { 5947 continue; 5948 } 5949 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5950 if (it->function_atend != NULL) { 5951 (*it->function_atend) (it->pointer, it->val); 5952 } 5953 SCTP_FREE(it, SCTP_M_ITER); 5954 } 5955 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5956 SCTP_ITERATOR_LOCK(); 5957 if ((sctp_it_ctl.cur_it) && 5958 (sctp_it_ctl.cur_it->vn == curvnet)) { 5959 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5960 } 5961 SCTP_ITERATOR_UNLOCK(); 5962 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5963 SCTP_WQ_ADDR_LOCK(); 5964 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5965 LIST_REMOVE(wi, sctp_nxt_addr); 5966 SCTP_DECR_LADDR_COUNT(); 5967 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5968 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5969 } 5970 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5971 } 5972 SCTP_WQ_ADDR_UNLOCK(); 5973 5974 /* 5975 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5976 * destroyed first). 5977 */ 5978 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5979 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5980 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5981 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5982 /* free the ifa */ 5983 LIST_REMOVE(ifa, next_bucket); 5984 LIST_REMOVE(ifa, next_ifa); 5985 SCTP_FREE(ifa, SCTP_M_IFA); 5986 } 5987 /* free the ifn */ 5988 LIST_REMOVE(ifn, next_bucket); 5989 LIST_REMOVE(ifn, next_ifn); 5990 SCTP_FREE(ifn, SCTP_M_IFN); 5991 } 5992 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5993 /* free the vrf */ 5994 LIST_REMOVE(vrf, next_vrf); 5995 SCTP_FREE(vrf, SCTP_M_VRF); 5996 } 5997 /* free the vrf hashes */ 5998 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5999 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6000 6001 /* 6002 * free the TIMEWAIT list elements malloc'd in the function 6003 * sctp_add_vtag_to_timewait()... 6004 */ 6005 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6006 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6007 if (!LIST_EMPTY(chain)) { 6008 prev_twait_block = NULL; 6009 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6010 if (prev_twait_block) { 6011 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6012 } 6013 prev_twait_block = twait_block; 6014 } 6015 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6016 } 6017 } 6018 6019 /* free the locks and mutexes */ 6020 #ifdef SCTP_PACKET_LOGGING 6021 SCTP_IP_PKTLOG_DESTROY(); 6022 #endif 6023 SCTP_IPI_ADDR_DESTROY(); 6024 SCTP_STATLOG_DESTROY(); 6025 SCTP_INP_INFO_LOCK_DESTROY(); 6026 6027 SCTP_WQ_ADDR_DESTROY(); 6028 6029 /* Get rid of other stuff too. */ 6030 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6031 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6032 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6033 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6034 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6035 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6036 6037 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6038 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6039 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6040 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6041 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6042 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6043 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6044 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6045 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6046 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6047 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6048 #endif 6049 } 6050 6051 6052 int 6053 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6054 int offset, int limit, 6055 struct sockaddr *src, struct sockaddr *dst, 6056 struct sockaddr *altsa) 6057 { 6058 /* 6059 * grub through the INIT pulling addresses and loading them to the 6060 * nets structure in the asoc. The from address in the mbuf should 6061 * also be loaded (if it is not already). This routine can be called 6062 * with either INIT or INIT-ACK's as long as the m points to the IP 6063 * packet and the offset points to the beginning of the parameters. 6064 */ 6065 struct sctp_inpcb *inp; 6066 struct sctp_nets *net, *nnet, *net_tmp; 6067 struct sctp_paramhdr *phdr, parm_buf; 6068 struct sctp_tcb *stcb_tmp; 6069 uint16_t ptype, plen; 6070 struct sockaddr *sa; 6071 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6072 struct sctp_auth_random *p_random = NULL; 6073 uint16_t random_len = 0; 6074 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6075 struct sctp_auth_hmac_algo *hmacs = NULL; 6076 uint16_t hmacs_len = 0; 6077 uint8_t saw_asconf = 0; 6078 uint8_t saw_asconf_ack = 0; 6079 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6080 struct sctp_auth_chunk_list *chunks = NULL; 6081 uint16_t num_chunks = 0; 6082 sctp_key_t *new_key; 6083 uint32_t keylen; 6084 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6085 uint8_t peer_supports_ecn; 6086 uint8_t peer_supports_prsctp; 6087 uint8_t peer_supports_auth; 6088 uint8_t peer_supports_asconf; 6089 uint8_t peer_supports_asconf_ack; 6090 uint8_t peer_supports_reconfig; 6091 uint8_t peer_supports_nrsack; 6092 uint8_t peer_supports_pktdrop; 6093 6094 #ifdef INET 6095 struct sockaddr_in sin; 6096 6097 #endif 6098 #ifdef INET6 6099 struct sockaddr_in6 sin6; 6100 6101 #endif 6102 6103 /* First get the destination address setup too. */ 6104 #ifdef INET 6105 memset(&sin, 0, sizeof(sin)); 6106 sin.sin_family = AF_INET; 6107 sin.sin_len = sizeof(sin); 6108 sin.sin_port = stcb->rport; 6109 #endif 6110 #ifdef INET6 6111 memset(&sin6, 0, sizeof(sin6)); 6112 sin6.sin6_family = AF_INET6; 6113 sin6.sin6_len = sizeof(struct sockaddr_in6); 6114 sin6.sin6_port = stcb->rport; 6115 #endif 6116 if (altsa) { 6117 sa = altsa; 6118 } else { 6119 sa = src; 6120 } 6121 peer_supports_ecn = 0; 6122 peer_supports_prsctp = 0; 6123 peer_supports_auth = 0; 6124 peer_supports_asconf = 0; 6125 peer_supports_reconfig = 0; 6126 peer_supports_nrsack = 0; 6127 peer_supports_pktdrop = 0; 6128 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6129 /* mark all addresses that we have currently on the list */ 6130 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6131 } 6132 /* does the source address already exist? if so skip it */ 6133 inp = stcb->sctp_ep; 6134 atomic_add_int(&stcb->asoc.refcnt, 1); 6135 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6136 atomic_add_int(&stcb->asoc.refcnt, -1); 6137 6138 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6139 /* we must add the source address */ 6140 /* no scope set here since we have a tcb already. */ 6141 switch (sa->sa_family) { 6142 #ifdef INET 6143 case AF_INET: 6144 if (stcb->asoc.scope.ipv4_addr_legal) { 6145 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6146 return (-1); 6147 } 6148 } 6149 break; 6150 #endif 6151 #ifdef INET6 6152 case AF_INET6: 6153 if (stcb->asoc.scope.ipv6_addr_legal) { 6154 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6155 return (-2); 6156 } 6157 } 6158 break; 6159 #endif 6160 default: 6161 break; 6162 } 6163 } else { 6164 if (net_tmp != NULL && stcb_tmp == stcb) { 6165 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6166 } else if (stcb_tmp != stcb) { 6167 /* It belongs to another association? */ 6168 if (stcb_tmp) 6169 SCTP_TCB_UNLOCK(stcb_tmp); 6170 return (-3); 6171 } 6172 } 6173 if (stcb->asoc.state == 0) { 6174 /* the assoc was freed? */ 6175 return (-4); 6176 } 6177 /* now we must go through each of the params. */ 6178 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6179 while (phdr) { 6180 ptype = ntohs(phdr->param_type); 6181 plen = ntohs(phdr->param_length); 6182 /* 6183 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6184 * (uint32_t)ptype, (int)plen); 6185 */ 6186 if (offset + plen > limit) { 6187 break; 6188 } 6189 if (plen == 0) { 6190 break; 6191 } 6192 #ifdef INET 6193 if (ptype == SCTP_IPV4_ADDRESS) { 6194 if (stcb->asoc.scope.ipv4_addr_legal) { 6195 struct sctp_ipv4addr_param *p4, p4_buf; 6196 6197 /* ok get the v4 address and check/add */ 6198 phdr = sctp_get_next_param(m, offset, 6199 (struct sctp_paramhdr *)&p4_buf, 6200 sizeof(p4_buf)); 6201 if (plen != sizeof(struct sctp_ipv4addr_param) || 6202 phdr == NULL) { 6203 return (-5); 6204 } 6205 p4 = (struct sctp_ipv4addr_param *)phdr; 6206 sin.sin_addr.s_addr = p4->addr; 6207 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6208 /* Skip multi-cast addresses */ 6209 goto next_param; 6210 } 6211 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6212 (sin.sin_addr.s_addr == INADDR_ANY)) { 6213 goto next_param; 6214 } 6215 sa = (struct sockaddr *)&sin; 6216 inp = stcb->sctp_ep; 6217 atomic_add_int(&stcb->asoc.refcnt, 1); 6218 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6219 dst, stcb); 6220 atomic_add_int(&stcb->asoc.refcnt, -1); 6221 6222 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6223 inp == NULL) { 6224 /* we must add the source address */ 6225 /* 6226 * no scope set since we have a tcb 6227 * already 6228 */ 6229 6230 /* 6231 * we must validate the state again 6232 * here 6233 */ 6234 add_it_now: 6235 if (stcb->asoc.state == 0) { 6236 /* the assoc was freed? */ 6237 return (-7); 6238 } 6239 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6240 return (-8); 6241 } 6242 } else if (stcb_tmp == stcb) { 6243 if (stcb->asoc.state == 0) { 6244 /* the assoc was freed? */ 6245 return (-10); 6246 } 6247 if (net != NULL) { 6248 /* clear flag */ 6249 net->dest_state &= 6250 ~SCTP_ADDR_NOT_IN_ASSOC; 6251 } 6252 } else { 6253 /* 6254 * strange, address is in another 6255 * assoc? straighten out locks. 6256 */ 6257 if (stcb_tmp) { 6258 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6259 struct mbuf *op_err; 6260 char msg[SCTP_DIAG_INFO_LEN]; 6261 6262 /* 6263 * in setup state we 6264 * abort this guy 6265 */ 6266 snprintf(msg, sizeof(msg), 6267 "%s:%d at %s", __FILE__, __LINE__, __func__); 6268 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6269 msg); 6270 sctp_abort_an_association(stcb_tmp->sctp_ep, 6271 stcb_tmp, op_err, 6272 SCTP_SO_NOT_LOCKED); 6273 goto add_it_now; 6274 } 6275 SCTP_TCB_UNLOCK(stcb_tmp); 6276 } 6277 if (stcb->asoc.state == 0) { 6278 /* the assoc was freed? */ 6279 return (-12); 6280 } 6281 return (-13); 6282 } 6283 } 6284 } else 6285 #endif 6286 #ifdef INET6 6287 if (ptype == SCTP_IPV6_ADDRESS) { 6288 if (stcb->asoc.scope.ipv6_addr_legal) { 6289 /* ok get the v6 address and check/add */ 6290 struct sctp_ipv6addr_param *p6, p6_buf; 6291 6292 phdr = sctp_get_next_param(m, offset, 6293 (struct sctp_paramhdr *)&p6_buf, 6294 sizeof(p6_buf)); 6295 if (plen != sizeof(struct sctp_ipv6addr_param) || 6296 phdr == NULL) { 6297 return (-14); 6298 } 6299 p6 = (struct sctp_ipv6addr_param *)phdr; 6300 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6301 sizeof(p6->addr)); 6302 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6303 /* Skip multi-cast addresses */ 6304 goto next_param; 6305 } 6306 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6307 /* 6308 * Link local make no sense without 6309 * scope 6310 */ 6311 goto next_param; 6312 } 6313 sa = (struct sockaddr *)&sin6; 6314 inp = stcb->sctp_ep; 6315 atomic_add_int(&stcb->asoc.refcnt, 1); 6316 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6317 dst, stcb); 6318 atomic_add_int(&stcb->asoc.refcnt, -1); 6319 if (stcb_tmp == NULL && 6320 (inp == stcb->sctp_ep || inp == NULL)) { 6321 /* 6322 * we must validate the state again 6323 * here 6324 */ 6325 add_it_now6: 6326 if (stcb->asoc.state == 0) { 6327 /* the assoc was freed? */ 6328 return (-16); 6329 } 6330 /* 6331 * we must add the address, no scope 6332 * set 6333 */ 6334 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6335 return (-17); 6336 } 6337 } else if (stcb_tmp == stcb) { 6338 /* 6339 * we must validate the state again 6340 * here 6341 */ 6342 if (stcb->asoc.state == 0) { 6343 /* the assoc was freed? */ 6344 return (-19); 6345 } 6346 if (net != NULL) { 6347 /* clear flag */ 6348 net->dest_state &= 6349 ~SCTP_ADDR_NOT_IN_ASSOC; 6350 } 6351 } else { 6352 /* 6353 * strange, address is in another 6354 * assoc? straighten out locks. 6355 */ 6356 if (stcb_tmp) { 6357 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6358 struct mbuf *op_err; 6359 char msg[SCTP_DIAG_INFO_LEN]; 6360 6361 /* 6362 * in setup state we 6363 * abort this guy 6364 */ 6365 snprintf(msg, sizeof(msg), 6366 "%s:%d at %s", __FILE__, __LINE__, __func__); 6367 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6368 msg); 6369 sctp_abort_an_association(stcb_tmp->sctp_ep, 6370 stcb_tmp, op_err, 6371 SCTP_SO_NOT_LOCKED); 6372 goto add_it_now6; 6373 } 6374 SCTP_TCB_UNLOCK(stcb_tmp); 6375 } 6376 if (stcb->asoc.state == 0) { 6377 /* the assoc was freed? */ 6378 return (-21); 6379 } 6380 return (-22); 6381 } 6382 } 6383 } else 6384 #endif 6385 if (ptype == SCTP_ECN_CAPABLE) { 6386 peer_supports_ecn = 1; 6387 } else if (ptype == SCTP_ULP_ADAPTATION) { 6388 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6389 struct sctp_adaptation_layer_indication ai, 6390 *aip; 6391 6392 phdr = sctp_get_next_param(m, offset, 6393 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6394 aip = (struct sctp_adaptation_layer_indication *)phdr; 6395 if (aip) { 6396 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6397 stcb->asoc.adaptation_needed = 1; 6398 } 6399 } 6400 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6401 struct sctp_asconf_addr_param lstore, *fee; 6402 int lptype; 6403 struct sockaddr *lsa = NULL; 6404 6405 #ifdef INET 6406 struct sctp_asconf_addrv4_param *fii; 6407 6408 #endif 6409 6410 if (stcb->asoc.asconf_supported == 0) { 6411 return (-100); 6412 } 6413 if (plen > sizeof(lstore)) { 6414 return (-23); 6415 } 6416 phdr = sctp_get_next_param(m, offset, 6417 (struct sctp_paramhdr *)&lstore, 6418 min(plen, sizeof(lstore))); 6419 if (phdr == NULL) { 6420 return (-24); 6421 } 6422 fee = (struct sctp_asconf_addr_param *)phdr; 6423 lptype = ntohs(fee->addrp.ph.param_type); 6424 switch (lptype) { 6425 #ifdef INET 6426 case SCTP_IPV4_ADDRESS: 6427 if (plen != 6428 sizeof(struct sctp_asconf_addrv4_param)) { 6429 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6430 (int)sizeof(struct sctp_asconf_addrv4_param), 6431 plen); 6432 } else { 6433 fii = (struct sctp_asconf_addrv4_param *)fee; 6434 sin.sin_addr.s_addr = fii->addrp.addr; 6435 lsa = (struct sockaddr *)&sin; 6436 } 6437 break; 6438 #endif 6439 #ifdef INET6 6440 case SCTP_IPV6_ADDRESS: 6441 if (plen != 6442 sizeof(struct sctp_asconf_addr_param)) { 6443 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6444 (int)sizeof(struct sctp_asconf_addr_param), 6445 plen); 6446 } else { 6447 memcpy(sin6.sin6_addr.s6_addr, 6448 fee->addrp.addr, 6449 sizeof(fee->addrp.addr)); 6450 lsa = (struct sockaddr *)&sin6; 6451 } 6452 break; 6453 #endif 6454 default: 6455 break; 6456 } 6457 if (lsa) { 6458 (void)sctp_set_primary_addr(stcb, sa, NULL); 6459 } 6460 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6461 stcb->asoc.peer_supports_nat = 1; 6462 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6463 /* Peer supports pr-sctp */ 6464 peer_supports_prsctp = 1; 6465 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6466 /* A supported extension chunk */ 6467 struct sctp_supported_chunk_types_param *pr_supported; 6468 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6469 int num_ent, i; 6470 6471 phdr = sctp_get_next_param(m, offset, 6472 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6473 if (phdr == NULL) { 6474 return (-25); 6475 } 6476 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6477 num_ent = plen - sizeof(struct sctp_paramhdr); 6478 for (i = 0; i < num_ent; i++) { 6479 switch (pr_supported->chunk_types[i]) { 6480 case SCTP_ASCONF: 6481 peer_supports_asconf = 1; 6482 break; 6483 case SCTP_ASCONF_ACK: 6484 peer_supports_asconf_ack = 1; 6485 break; 6486 case SCTP_FORWARD_CUM_TSN: 6487 peer_supports_prsctp = 1; 6488 break; 6489 case SCTP_PACKET_DROPPED: 6490 peer_supports_pktdrop = 1; 6491 break; 6492 case SCTP_NR_SELECTIVE_ACK: 6493 peer_supports_nrsack = 1; 6494 break; 6495 case SCTP_STREAM_RESET: 6496 peer_supports_reconfig = 1; 6497 break; 6498 case SCTP_AUTHENTICATION: 6499 peer_supports_auth = 1; 6500 break; 6501 default: 6502 /* one I have not learned yet */ 6503 break; 6504 6505 } 6506 } 6507 } else if (ptype == SCTP_RANDOM) { 6508 if (plen > sizeof(random_store)) 6509 break; 6510 if (got_random) { 6511 /* already processed a RANDOM */ 6512 goto next_param; 6513 } 6514 phdr = sctp_get_next_param(m, offset, 6515 (struct sctp_paramhdr *)random_store, 6516 min(sizeof(random_store), plen)); 6517 if (phdr == NULL) 6518 return (-26); 6519 p_random = (struct sctp_auth_random *)phdr; 6520 random_len = plen - sizeof(*p_random); 6521 /* enforce the random length */ 6522 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6523 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6524 return (-27); 6525 } 6526 got_random = 1; 6527 } else if (ptype == SCTP_HMAC_LIST) { 6528 uint16_t num_hmacs; 6529 uint16_t i; 6530 6531 if (plen > sizeof(hmacs_store)) 6532 break; 6533 if (got_hmacs) { 6534 /* already processed a HMAC list */ 6535 goto next_param; 6536 } 6537 phdr = sctp_get_next_param(m, offset, 6538 (struct sctp_paramhdr *)hmacs_store, 6539 min(plen, sizeof(hmacs_store))); 6540 if (phdr == NULL) 6541 return (-28); 6542 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6543 hmacs_len = plen - sizeof(*hmacs); 6544 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6545 /* validate the hmac list */ 6546 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6547 return (-29); 6548 } 6549 if (stcb->asoc.peer_hmacs != NULL) 6550 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6551 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6552 if (stcb->asoc.peer_hmacs != NULL) { 6553 for (i = 0; i < num_hmacs; i++) { 6554 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6555 ntohs(hmacs->hmac_ids[i])); 6556 } 6557 } 6558 got_hmacs = 1; 6559 } else if (ptype == SCTP_CHUNK_LIST) { 6560 int i; 6561 6562 if (plen > sizeof(chunks_store)) 6563 break; 6564 if (got_chklist) { 6565 /* already processed a Chunks list */ 6566 goto next_param; 6567 } 6568 phdr = sctp_get_next_param(m, offset, 6569 (struct sctp_paramhdr *)chunks_store, 6570 min(plen, sizeof(chunks_store))); 6571 if (phdr == NULL) 6572 return (-30); 6573 chunks = (struct sctp_auth_chunk_list *)phdr; 6574 num_chunks = plen - sizeof(*chunks); 6575 if (stcb->asoc.peer_auth_chunks != NULL) 6576 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6577 else 6578 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6579 for (i = 0; i < num_chunks; i++) { 6580 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6581 stcb->asoc.peer_auth_chunks); 6582 /* record asconf/asconf-ack if listed */ 6583 if (chunks->chunk_types[i] == SCTP_ASCONF) 6584 saw_asconf = 1; 6585 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6586 saw_asconf_ack = 1; 6587 6588 } 6589 got_chklist = 1; 6590 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6591 (ptype == SCTP_STATE_COOKIE) || 6592 (ptype == SCTP_UNRECOG_PARAM) || 6593 (ptype == SCTP_COOKIE_PRESERVE) || 6594 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6595 (ptype == SCTP_ADD_IP_ADDRESS) || 6596 (ptype == SCTP_DEL_IP_ADDRESS) || 6597 (ptype == SCTP_ERROR_CAUSE_IND) || 6598 (ptype == SCTP_SUCCESS_REPORT)) { 6599 /* don't care */ ; 6600 } else { 6601 if ((ptype & 0x8000) == 0x0000) { 6602 /* 6603 * must stop processing the rest of the 6604 * param's. Any report bits were handled 6605 * with the call to 6606 * sctp_arethere_unrecognized_parameters() 6607 * when the INIT or INIT-ACK was first seen. 6608 */ 6609 break; 6610 } 6611 } 6612 6613 next_param: 6614 offset += SCTP_SIZE32(plen); 6615 if (offset >= limit) { 6616 break; 6617 } 6618 phdr = sctp_get_next_param(m, offset, &parm_buf, 6619 sizeof(parm_buf)); 6620 } 6621 /* Now check to see if we need to purge any addresses */ 6622 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6623 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6624 SCTP_ADDR_NOT_IN_ASSOC) { 6625 /* This address has been removed from the asoc */ 6626 /* remove and free it */ 6627 stcb->asoc.numnets--; 6628 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6629 sctp_free_remote_addr(net); 6630 if (net == stcb->asoc.primary_destination) { 6631 stcb->asoc.primary_destination = NULL; 6632 sctp_select_primary_destination(stcb); 6633 } 6634 } 6635 } 6636 if ((stcb->asoc.ecn_supported == 1) && 6637 (peer_supports_ecn == 0)) { 6638 stcb->asoc.ecn_supported = 0; 6639 } 6640 if ((stcb->asoc.prsctp_supported == 1) && 6641 (peer_supports_prsctp == 0)) { 6642 stcb->asoc.prsctp_supported = 0; 6643 } 6644 if ((stcb->asoc.auth_supported == 1) && 6645 ((peer_supports_auth == 0) || 6646 (got_random == 0) || (got_hmacs == 0))) { 6647 stcb->asoc.auth_supported = 0; 6648 } 6649 if ((stcb->asoc.asconf_supported == 1) && 6650 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6651 (stcb->asoc.auth_supported == 0) || 6652 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6653 stcb->asoc.asconf_supported = 0; 6654 } 6655 if ((stcb->asoc.reconfig_supported == 1) && 6656 (peer_supports_reconfig == 0)) { 6657 stcb->asoc.reconfig_supported = 0; 6658 } 6659 if ((stcb->asoc.nrsack_supported == 1) && 6660 (peer_supports_nrsack == 0)) { 6661 stcb->asoc.nrsack_supported = 0; 6662 } 6663 if ((stcb->asoc.pktdrop_supported == 1) && 6664 (peer_supports_pktdrop == 0)) { 6665 stcb->asoc.pktdrop_supported = 0; 6666 } 6667 /* validate authentication required parameters */ 6668 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6669 /* peer does not support auth but sent a chunks list? */ 6670 return (-31); 6671 } 6672 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6673 /* peer supports asconf but not auth? */ 6674 return (-32); 6675 } else if ((peer_supports_asconf == 1) && 6676 (peer_supports_auth == 1) && 6677 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6678 return (-33); 6679 } 6680 /* concatenate the full random key */ 6681 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6682 if (chunks != NULL) { 6683 keylen += sizeof(*chunks) + num_chunks; 6684 } 6685 new_key = sctp_alloc_key(keylen); 6686 if (new_key != NULL) { 6687 /* copy in the RANDOM */ 6688 if (p_random != NULL) { 6689 keylen = sizeof(*p_random) + random_len; 6690 bcopy(p_random, new_key->key, keylen); 6691 } 6692 /* append in the AUTH chunks */ 6693 if (chunks != NULL) { 6694 bcopy(chunks, new_key->key + keylen, 6695 sizeof(*chunks) + num_chunks); 6696 keylen += sizeof(*chunks) + num_chunks; 6697 } 6698 /* append in the HMACs */ 6699 if (hmacs != NULL) { 6700 bcopy(hmacs, new_key->key + keylen, 6701 sizeof(*hmacs) + hmacs_len); 6702 } 6703 } else { 6704 /* failed to get memory for the key */ 6705 return (-34); 6706 } 6707 if (stcb->asoc.authinfo.peer_random != NULL) 6708 sctp_free_key(stcb->asoc.authinfo.peer_random); 6709 stcb->asoc.authinfo.peer_random = new_key; 6710 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6711 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6712 6713 return (0); 6714 } 6715 6716 int 6717 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6718 struct sctp_nets *net) 6719 { 6720 /* make sure the requested primary address exists in the assoc */ 6721 if (net == NULL && sa) 6722 net = sctp_findnet(stcb, sa); 6723 6724 if (net == NULL) { 6725 /* didn't find the requested primary address! */ 6726 return (-1); 6727 } else { 6728 /* set the primary address */ 6729 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6730 /* Must be confirmed, so queue to set */ 6731 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6732 return (0); 6733 } 6734 stcb->asoc.primary_destination = net; 6735 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6736 sctp_free_remote_addr(stcb->asoc.alternate); 6737 stcb->asoc.alternate = NULL; 6738 } 6739 net = TAILQ_FIRST(&stcb->asoc.nets); 6740 if (net != stcb->asoc.primary_destination) { 6741 /* 6742 * first one on the list is NOT the primary 6743 * sctp_cmpaddr() is much more efficient if the 6744 * primary is the first on the list, make it so. 6745 */ 6746 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6747 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6748 } 6749 return (0); 6750 } 6751 } 6752 6753 int 6754 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6755 { 6756 /* 6757 * This function serves two purposes. It will see if a TAG can be 6758 * re-used and return 1 for yes it is ok and 0 for don't use that 6759 * tag. A secondary function it will do is purge out old tags that 6760 * can be removed. 6761 */ 6762 struct sctpvtaghead *chain; 6763 struct sctp_tagblock *twait_block; 6764 struct sctpasochead *head; 6765 struct sctp_tcb *stcb; 6766 int i; 6767 6768 SCTP_INP_INFO_RLOCK(); 6769 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6770 SCTP_BASE_INFO(hashasocmark))]; 6771 LIST_FOREACH(stcb, head, sctp_asocs) { 6772 /* 6773 * We choose not to lock anything here. TCB's can't be 6774 * removed since we have the read lock, so they can't be 6775 * freed on us, same thing for the INP. I may be wrong with 6776 * this assumption, but we will go with it for now :-) 6777 */ 6778 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6779 continue; 6780 } 6781 if (stcb->asoc.my_vtag == tag) { 6782 /* candidate */ 6783 if (stcb->rport != rport) { 6784 continue; 6785 } 6786 if (stcb->sctp_ep->sctp_lport != lport) { 6787 continue; 6788 } 6789 /* Its a used tag set */ 6790 SCTP_INP_INFO_RUNLOCK(); 6791 return (0); 6792 } 6793 } 6794 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6795 /* Now what about timed wait ? */ 6796 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6797 /* 6798 * Block(s) are present, lets see if we have this tag in the 6799 * list 6800 */ 6801 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6802 if (twait_block->vtag_block[i].v_tag == 0) { 6803 /* not used */ 6804 continue; 6805 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6806 now->tv_sec) { 6807 /* Audit expires this guy */ 6808 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6809 twait_block->vtag_block[i].v_tag = 0; 6810 twait_block->vtag_block[i].lport = 0; 6811 twait_block->vtag_block[i].rport = 0; 6812 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6813 (twait_block->vtag_block[i].lport == lport) && 6814 (twait_block->vtag_block[i].rport == rport)) { 6815 /* Bad tag, sorry :< */ 6816 SCTP_INP_INFO_RUNLOCK(); 6817 return (0); 6818 } 6819 } 6820 } 6821 SCTP_INP_INFO_RUNLOCK(); 6822 return (1); 6823 } 6824 6825 static void 6826 sctp_drain_mbufs(struct sctp_tcb *stcb) 6827 { 6828 /* 6829 * We must hunt this association for MBUF's past the cumack (i.e. 6830 * out of order data that we can renege on). 6831 */ 6832 struct sctp_association *asoc; 6833 struct sctp_tmit_chunk *chk, *nchk; 6834 uint32_t cumulative_tsn_p1; 6835 struct sctp_queued_to_read *ctl, *nctl; 6836 int cnt, strmat; 6837 uint32_t gap, i; 6838 int fnd = 0; 6839 6840 /* We look for anything larger than the cum-ack + 1 */ 6841 6842 asoc = &stcb->asoc; 6843 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6844 /* none we can reneg on. */ 6845 return; 6846 } 6847 SCTP_STAT_INCR(sctps_protocol_drains_done); 6848 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6849 cnt = 0; 6850 /* First look in the re-assembly queue */ 6851 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6852 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6853 /* Yep it is above cum-ack */ 6854 cnt++; 6855 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6856 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6857 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6858 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6859 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6860 if (chk->data) { 6861 sctp_m_freem(chk->data); 6862 chk->data = NULL; 6863 } 6864 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6865 } 6866 } 6867 /* Ok that was fun, now we will drain all the inbound streams? */ 6868 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6869 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6870 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6871 /* Yep it is above cum-ack */ 6872 cnt++; 6873 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6874 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6875 sctp_ucount_decr(asoc->cnt_on_all_streams); 6876 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6877 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6878 if (ctl->data) { 6879 sctp_m_freem(ctl->data); 6880 ctl->data = NULL; 6881 } 6882 sctp_free_remote_addr(ctl->whoFrom); 6883 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6884 SCTP_DECR_READQ_COUNT(); 6885 } 6886 } 6887 } 6888 if (cnt) { 6889 /* We must back down to see what the new highest is */ 6890 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6891 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6892 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6893 asoc->highest_tsn_inside_map = i; 6894 fnd = 1; 6895 break; 6896 } 6897 } 6898 if (!fnd) { 6899 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6900 } 6901 /* 6902 * Question, should we go through the delivery queue? The 6903 * only reason things are on here is the app not reading OR 6904 * a p-d-api up. An attacker COULD send enough in to 6905 * initiate the PD-API and then send a bunch of stuff to 6906 * other streams... these would wind up on the delivery 6907 * queue.. and then we would not get to them. But in order 6908 * to do this I then have to back-track and un-deliver 6909 * sequence numbers in streams.. el-yucko. I think for now 6910 * we will NOT look at the delivery queue and leave it to be 6911 * something to consider later. An alternative would be to 6912 * abort the P-D-API with a notification and then deliver 6913 * the data.... Or another method might be to keep track of 6914 * how many times the situation occurs and if we see a 6915 * possible attack underway just abort the association. 6916 */ 6917 #ifdef SCTP_DEBUG 6918 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6919 #endif 6920 /* 6921 * Now do we need to find a new 6922 * asoc->highest_tsn_inside_map? 6923 */ 6924 asoc->last_revoke_count = cnt; 6925 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6926 /* sa_ignore NO_NULL_CHK */ 6927 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6928 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6929 } 6930 /* 6931 * Another issue, in un-setting the TSN's in the mapping array we 6932 * DID NOT adjust the highest_tsn marker. This will cause one of 6933 * two things to occur. It may cause us to do extra work in checking 6934 * for our mapping array movement. More importantly it may cause us 6935 * to SACK every datagram. This may not be a bad thing though since 6936 * we will recover once we get our cum-ack above and all this stuff 6937 * we dumped recovered. 6938 */ 6939 } 6940 6941 void 6942 sctp_drain() 6943 { 6944 /* 6945 * We must walk the PCB lists for ALL associations here. The system 6946 * is LOW on MBUF's and needs help. This is where reneging will 6947 * occur. We really hope this does NOT happen! 6948 */ 6949 VNET_ITERATOR_DECL(vnet_iter); 6950 VNET_LIST_RLOCK_NOSLEEP(); 6951 VNET_FOREACH(vnet_iter) { 6952 CURVNET_SET(vnet_iter); 6953 struct sctp_inpcb *inp; 6954 struct sctp_tcb *stcb; 6955 6956 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6957 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6958 #ifdef VIMAGE 6959 continue; 6960 #else 6961 return; 6962 #endif 6963 } 6964 SCTP_INP_INFO_RLOCK(); 6965 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6966 /* For each endpoint */ 6967 SCTP_INP_RLOCK(inp); 6968 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6969 /* For each association */ 6970 SCTP_TCB_LOCK(stcb); 6971 sctp_drain_mbufs(stcb); 6972 SCTP_TCB_UNLOCK(stcb); 6973 } 6974 SCTP_INP_RUNLOCK(inp); 6975 } 6976 SCTP_INP_INFO_RUNLOCK(); 6977 CURVNET_RESTORE(); 6978 } 6979 VNET_LIST_RUNLOCK_NOSLEEP(); 6980 } 6981 6982 /* 6983 * start a new iterator 6984 * iterates through all endpoints and associations based on the pcb_state 6985 * flags and asoc_state. "af" (mandatory) is executed for all matching 6986 * assocs and "ef" (optional) is executed when the iterator completes. 6987 * "inpf" (optional) is executed for each new endpoint as it is being 6988 * iterated through. inpe (optional) is called when the inp completes 6989 * its way through all the stcbs. 6990 */ 6991 int 6992 sctp_initiate_iterator(inp_func inpf, 6993 asoc_func af, 6994 inp_func inpe, 6995 uint32_t pcb_state, 6996 uint32_t pcb_features, 6997 uint32_t asoc_state, 6998 void *argp, 6999 uint32_t argi, 7000 end_func ef, 7001 struct sctp_inpcb *s_inp, 7002 uint8_t chunk_output_off) 7003 { 7004 struct sctp_iterator *it = NULL; 7005 7006 if (af == NULL) { 7007 return (-1); 7008 } 7009 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7010 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7011 SCTP_BASE_VAR(sctp_pcb_initialized)); 7012 return (-1); 7013 } 7014 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7015 SCTP_M_ITER); 7016 if (it == NULL) { 7017 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7018 return (ENOMEM); 7019 } 7020 memset(it, 0, sizeof(*it)); 7021 it->function_assoc = af; 7022 it->function_inp = inpf; 7023 if (inpf) 7024 it->done_current_ep = 0; 7025 else 7026 it->done_current_ep = 1; 7027 it->function_atend = ef; 7028 it->pointer = argp; 7029 it->val = argi; 7030 it->pcb_flags = pcb_state; 7031 it->pcb_features = pcb_features; 7032 it->asoc_state = asoc_state; 7033 it->function_inp_end = inpe; 7034 it->no_chunk_output = chunk_output_off; 7035 it->vn = curvnet; 7036 if (s_inp) { 7037 /* Assume lock is held here */ 7038 it->inp = s_inp; 7039 SCTP_INP_INCR_REF(it->inp); 7040 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7041 } else { 7042 SCTP_INP_INFO_RLOCK(); 7043 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7044 if (it->inp) { 7045 SCTP_INP_INCR_REF(it->inp); 7046 } 7047 SCTP_INP_INFO_RUNLOCK(); 7048 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7049 7050 } 7051 SCTP_IPI_ITERATOR_WQ_LOCK(); 7052 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7053 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7054 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7055 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7056 SCTP_FREE(it, SCTP_M_ITER); 7057 return (-1); 7058 } 7059 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7060 if (sctp_it_ctl.iterator_running == 0) { 7061 sctp_wakeup_iterator(); 7062 } 7063 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7064 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7065 return (0); 7066 } 7067