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 #include <netinet/udp.h> 50 #ifdef INET6 51 #include <netinet6/ip6_var.h> 52 #endif 53 #include <sys/sched.h> 54 #include <sys/smp.h> 55 #include <sys/unistd.h> 56 57 58 VNET_DEFINE(struct sctp_base_info, system_base_info); 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 79 #endif 80 81 void 82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 83 { 84 /* 85 * We really don't need to lock this, but I will just because it 86 * does not hurt. 87 */ 88 SCTP_INP_INFO_RLOCK(); 89 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 90 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 91 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 92 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 93 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 94 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 95 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 96 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 97 98 SCTP_INP_INFO_RUNLOCK(); 99 } 100 101 /* 102 * Addresses are added to VRF's (Virtual Router's). For BSD we 103 * have only the default VRF 0. We maintain a hash list of 104 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 105 * these has a list of addresses. When we add a new address 106 * to a VRF we lookup the ifn/ifn_index, if the ifn does 107 * not exist we create it and add it to the list of IFN's 108 * within the VRF. Once we have the sctp_ifn, we add the 109 * address to the list. So we look something like: 110 * 111 * hash-vrf-table 112 * vrf-> ifn-> ifn -> ifn 113 * vrf | 114 * ... +--ifa-> ifa -> ifa 115 * vrf 116 * 117 * We keep these separate lists since the SCTP subsystem will 118 * point to these from its source address selection nets structure. 119 * When an address is deleted it does not happen right away on 120 * the SCTP side, it gets scheduled. What we do when a 121 * delete happens is immediately remove the address from 122 * the master list and decrement the refcount. As our 123 * addip iterator works through and frees the src address 124 * selection pointing to the sctp_ifa, eventually the refcount 125 * will reach 0 and we will delete it. Note that it is assumed 126 * that any locking on system level ifn/ifa is done at the 127 * caller of these functions and these routines will only 128 * lock the SCTP structures as they add or delete things. 129 * 130 * Other notes on VRF concepts. 131 * - An endpoint can be in multiple VRF's 132 * - An association lives within a VRF and only one VRF. 133 * - Any incoming packet we can deduce the VRF for by 134 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 135 * - Any downward send call or connect call must supply the 136 * VRF via ancillary data or via some sort of set default 137 * VRF socket option call (again for BSD no brainer since 138 * the VRF is always 0). 139 * - An endpoint may add multiple VRF's to it. 140 * - Listening sockets can accept associations in any 141 * of the VRF's they are in but the assoc will end up 142 * in only one VRF (gotten from the packet or connect/send). 143 * 144 */ 145 146 struct sctp_vrf * 147 sctp_allocate_vrf(int vrf_id) 148 { 149 struct sctp_vrf *vrf = NULL; 150 struct sctp_vrflist *bucket; 151 152 /* First allocate the VRF structure */ 153 vrf = sctp_find_vrf(vrf_id); 154 if (vrf) { 155 /* Already allocated */ 156 return (vrf); 157 } 158 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 159 SCTP_M_VRF); 160 if (vrf == NULL) { 161 /* No memory */ 162 #ifdef INVARIANTS 163 panic("No memory for VRF:%d", vrf_id); 164 #endif 165 return (NULL); 166 } 167 /* setup the VRF */ 168 memset(vrf, 0, sizeof(struct sctp_vrf)); 169 vrf->vrf_id = vrf_id; 170 LIST_INIT(&vrf->ifnlist); 171 vrf->total_ifa_count = 0; 172 vrf->refcount = 0; 173 /* now also setup table ids */ 174 SCTP_INIT_VRF_TABLEID(vrf); 175 /* Init the HASH of addresses */ 176 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 177 &vrf->vrf_addr_hashmark); 178 if (vrf->vrf_addr_hash == NULL) { 179 /* No memory */ 180 #ifdef INVARIANTS 181 panic("No memory for VRF:%d", vrf_id); 182 #endif 183 SCTP_FREE(vrf, SCTP_M_VRF); 184 return (NULL); 185 } 186 /* Add it to the hash table */ 187 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 188 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 189 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 190 return (vrf); 191 } 192 193 194 struct sctp_ifn * 195 sctp_find_ifn(void *ifn, uint32_t ifn_index) 196 { 197 struct sctp_ifn *sctp_ifnp; 198 struct sctp_ifnlist *hash_ifn_head; 199 200 /* 201 * We assume the lock is held for the addresses if that's wrong 202 * problems could occur :-) 203 */ 204 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 205 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 206 if (sctp_ifnp->ifn_index == ifn_index) { 207 return (sctp_ifnp); 208 } 209 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 210 return (sctp_ifnp); 211 } 212 } 213 return (NULL); 214 } 215 216 217 218 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 void 234 sctp_free_vrf(struct sctp_vrf *vrf) 235 { 236 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 237 if (vrf->vrf_addr_hash) { 238 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 239 vrf->vrf_addr_hash = NULL; 240 } 241 /* We zero'd the count */ 242 LIST_REMOVE(vrf, next_vrf); 243 SCTP_FREE(vrf, SCTP_M_VRF); 244 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 245 } 246 } 247 248 void 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 250 { 251 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 252 /* We zero'd the count */ 253 if (sctp_ifnp->vrf) { 254 sctp_free_vrf(sctp_ifnp->vrf); 255 } 256 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 257 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 258 } 259 } 260 261 void 262 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 263 { 264 struct sctp_ifn *sctp_ifnp; 265 266 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 267 if (sctp_ifnp != NULL) { 268 sctp_ifnp->ifn_mtu = mtu; 269 } 270 } 271 272 273 void 274 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 275 { 276 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 277 /* We zero'd the count */ 278 if (sctp_ifap->ifn_p) { 279 sctp_free_ifn(sctp_ifap->ifn_p); 280 } 281 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 282 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 283 } 284 } 285 286 static void 287 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 288 { 289 struct sctp_ifn *found; 290 291 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 292 if (found == NULL) { 293 /* Not in the list.. sorry */ 294 return; 295 } 296 if (hold_addr_lock == 0) 297 SCTP_IPI_ADDR_WLOCK(); 298 LIST_REMOVE(sctp_ifnp, next_bucket); 299 LIST_REMOVE(sctp_ifnp, next_ifn); 300 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 301 sctp_ifnp->registered_af); 302 if (hold_addr_lock == 0) 303 SCTP_IPI_ADDR_WUNLOCK(); 304 /* Take away the reference, and possibly free it */ 305 sctp_free_ifn(sctp_ifnp); 306 } 307 308 void 309 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 310 const char *if_name, uint32_t ifn_index) 311 { 312 struct sctp_vrf *vrf; 313 struct sctp_ifa *sctp_ifap = NULL; 314 315 SCTP_IPI_ADDR_RLOCK(); 316 vrf = sctp_find_vrf(vrf_id); 317 if (vrf == NULL) { 318 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 319 goto out; 320 321 } 322 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 323 if (sctp_ifap == NULL) { 324 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 325 goto out; 326 } 327 if (sctp_ifap->ifn_p == NULL) { 328 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 329 goto out; 330 } 331 if (if_name) { 332 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 334 sctp_ifap->ifn_p->ifn_name, if_name); 335 goto out; 336 } 337 } else { 338 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 340 sctp_ifap->ifn_p->ifn_index, ifn_index); 341 goto out; 342 } 343 } 344 345 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 346 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 347 out: 348 SCTP_IPI_ADDR_RUNLOCK(); 349 } 350 351 void 352 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 353 const char *if_name, uint32_t ifn_index) 354 { 355 struct sctp_vrf *vrf; 356 struct sctp_ifa *sctp_ifap = NULL; 357 358 SCTP_IPI_ADDR_RLOCK(); 359 vrf = sctp_find_vrf(vrf_id); 360 if (vrf == NULL) { 361 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 362 goto out; 363 364 } 365 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 366 if (sctp_ifap == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 368 goto out; 369 } 370 if (sctp_ifap->ifn_p == NULL) { 371 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 372 goto out; 373 } 374 if (if_name) { 375 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 376 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 377 sctp_ifap->ifn_p->ifn_name, if_name); 378 goto out; 379 } 380 } else { 381 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 383 sctp_ifap->ifn_p->ifn_index, ifn_index); 384 goto out; 385 } 386 } 387 388 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 389 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 390 out: 391 SCTP_IPI_ADDR_RUNLOCK(); 392 } 393 394 /*- 395 * Add an ifa to an ifn. 396 * Register the interface as necessary. 397 * NOTE: ADDR write lock MUST be held. 398 */ 399 static void 400 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 401 { 402 int ifa_af; 403 404 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 405 sctp_ifap->ifn_p = sctp_ifnp; 406 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 407 /* update address counts */ 408 sctp_ifnp->ifa_count++; 409 ifa_af = sctp_ifap->address.sa.sa_family; 410 switch (ifa_af) { 411 #ifdef INET 412 case AF_INET: 413 sctp_ifnp->num_v4++; 414 break; 415 #endif 416 #ifdef INET6 417 case AF_INET6: 418 sctp_ifnp->num_v6++; 419 break; 420 #endif 421 default: 422 break; 423 } 424 if (sctp_ifnp->ifa_count == 1) { 425 /* register the new interface */ 426 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 427 sctp_ifnp->registered_af = ifa_af; 428 } 429 } 430 431 /*- 432 * Remove an ifa from its ifn. 433 * If no more addresses exist, remove the ifn too. Otherwise, re-register 434 * the interface based on the remaining address families left. 435 * NOTE: ADDR write lock MUST be held. 436 */ 437 static void 438 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 439 { 440 LIST_REMOVE(sctp_ifap, next_ifa); 441 if (sctp_ifap->ifn_p) { 442 /* update address counts */ 443 sctp_ifap->ifn_p->ifa_count--; 444 switch (sctp_ifap->address.sa.sa_family) { 445 #ifdef INET 446 case AF_INET: 447 sctp_ifap->ifn_p->num_v4--; 448 break; 449 #endif 450 #ifdef INET6 451 case AF_INET6: 452 sctp_ifap->ifn_p->num_v6--; 453 break; 454 #endif 455 default: 456 break; 457 } 458 459 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 460 /* remove the ifn, possibly freeing it */ 461 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 462 } else { 463 /* re-register address family type, if needed */ 464 if ((sctp_ifap->ifn_p->num_v6 == 0) && 465 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 466 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 467 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 468 sctp_ifap->ifn_p->registered_af = AF_INET; 469 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 470 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 471 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 472 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 473 sctp_ifap->ifn_p->registered_af = AF_INET6; 474 } 475 /* free the ifn refcount */ 476 sctp_free_ifn(sctp_ifap->ifn_p); 477 } 478 sctp_ifap->ifn_p = NULL; 479 } 480 } 481 482 struct sctp_ifa * 483 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 484 uint32_t ifn_type, const char *if_name, void *ifa, 485 struct sockaddr *addr, uint32_t ifa_flags, 486 int dynamic_add) 487 { 488 struct sctp_vrf *vrf; 489 struct sctp_ifn *sctp_ifnp = NULL; 490 struct sctp_ifa *sctp_ifap = NULL; 491 struct sctp_ifalist *hash_addr_head; 492 struct sctp_ifnlist *hash_ifn_head; 493 uint32_t hash_of_addr; 494 int new_ifn_af = 0; 495 496 #ifdef SCTP_DEBUG 497 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 498 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 499 #endif 500 SCTP_IPI_ADDR_WLOCK(); 501 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 502 if (sctp_ifnp) { 503 vrf = sctp_ifnp->vrf; 504 } else { 505 vrf = sctp_find_vrf(vrf_id); 506 if (vrf == NULL) { 507 vrf = sctp_allocate_vrf(vrf_id); 508 if (vrf == NULL) { 509 SCTP_IPI_ADDR_WUNLOCK(); 510 return (NULL); 511 } 512 } 513 } 514 if (sctp_ifnp == NULL) { 515 /* 516 * build one and add it, can't hold lock until after malloc 517 * done though. 518 */ 519 SCTP_IPI_ADDR_WUNLOCK(); 520 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 521 sizeof(struct sctp_ifn), SCTP_M_IFN); 522 if (sctp_ifnp == NULL) { 523 #ifdef INVARIANTS 524 panic("No memory for IFN"); 525 #endif 526 return (NULL); 527 } 528 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 529 sctp_ifnp->ifn_index = ifn_index; 530 sctp_ifnp->ifn_p = ifn; 531 sctp_ifnp->ifn_type = ifn_type; 532 sctp_ifnp->refcount = 0; 533 sctp_ifnp->vrf = vrf; 534 atomic_add_int(&vrf->refcount, 1); 535 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 536 if (if_name != NULL) { 537 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 538 } else { 539 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 540 } 541 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 542 LIST_INIT(&sctp_ifnp->ifalist); 543 SCTP_IPI_ADDR_WLOCK(); 544 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 545 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 546 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 547 new_ifn_af = 1; 548 } 549 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 550 if (sctp_ifap) { 551 /* Hmm, it already exists? */ 552 if ((sctp_ifap->ifn_p) && 553 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 554 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 555 sctp_ifap->ifn_p->ifn_name, ifn_index, 556 sctp_ifap); 557 if (new_ifn_af) { 558 /* Remove the created one that we don't want */ 559 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 560 } 561 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 562 /* easy to solve, just switch back to active */ 563 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 564 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 565 sctp_ifap->ifn_p = sctp_ifnp; 566 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 567 } 568 exit_stage_left: 569 SCTP_IPI_ADDR_WUNLOCK(); 570 return (sctp_ifap); 571 } else { 572 if (sctp_ifap->ifn_p) { 573 /* 574 * The last IFN gets the address, remove the 575 * old one 576 */ 577 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 578 sctp_ifap, sctp_ifap->ifn_p->ifn_name, 579 sctp_ifap->ifn_p->ifn_index, if_name, 580 ifn_index); 581 /* remove the address from the old ifn */ 582 sctp_remove_ifa_from_ifn(sctp_ifap); 583 /* move the address over to the new ifn */ 584 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 585 goto exit_stage_left; 586 } else { 587 /* repair ifnp which was NULL ? */ 588 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 589 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 590 sctp_ifnp, sctp_ifap); 591 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 592 } 593 goto exit_stage_left; 594 } 595 } 596 SCTP_IPI_ADDR_WUNLOCK(); 597 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 598 if (sctp_ifap == NULL) { 599 #ifdef INVARIANTS 600 panic("No memory for IFA"); 601 #endif 602 return (NULL); 603 } 604 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 605 sctp_ifap->ifn_p = sctp_ifnp; 606 atomic_add_int(&sctp_ifnp->refcount, 1); 607 sctp_ifap->vrf_id = vrf_id; 608 sctp_ifap->ifa = ifa; 609 memcpy(&sctp_ifap->address, addr, addr->sa_len); 610 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 611 sctp_ifap->flags = ifa_flags; 612 /* Set scope */ 613 switch (sctp_ifap->address.sa.sa_family) { 614 #ifdef INET 615 case AF_INET: 616 { 617 struct sockaddr_in *sin; 618 619 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 620 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 621 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 622 sctp_ifap->src_is_loop = 1; 623 } 624 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 625 sctp_ifap->src_is_priv = 1; 626 } 627 sctp_ifnp->num_v4++; 628 if (new_ifn_af) 629 new_ifn_af = AF_INET; 630 break; 631 } 632 #endif 633 #ifdef INET6 634 case AF_INET6: 635 { 636 /* ok to use deprecated addresses? */ 637 struct sockaddr_in6 *sin6; 638 639 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 640 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 641 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 642 sctp_ifap->src_is_loop = 1; 643 } 644 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 645 sctp_ifap->src_is_priv = 1; 646 } 647 sctp_ifnp->num_v6++; 648 if (new_ifn_af) 649 new_ifn_af = AF_INET6; 650 break; 651 } 652 #endif 653 default: 654 new_ifn_af = 0; 655 break; 656 } 657 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 658 659 if ((sctp_ifap->src_is_priv == 0) && 660 (sctp_ifap->src_is_loop == 0)) { 661 sctp_ifap->src_is_glob = 1; 662 } 663 SCTP_IPI_ADDR_WLOCK(); 664 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 665 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 666 sctp_ifap->refcount = 1; 667 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 668 sctp_ifnp->ifa_count++; 669 vrf->total_ifa_count++; 670 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 671 if (new_ifn_af) { 672 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 673 sctp_ifnp->registered_af = new_ifn_af; 674 } 675 SCTP_IPI_ADDR_WUNLOCK(); 676 if (dynamic_add) { 677 /* 678 * Bump up the refcount so that when the timer completes it 679 * will drop back down. 680 */ 681 struct sctp_laddr *wi; 682 683 atomic_add_int(&sctp_ifap->refcount, 1); 684 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 685 if (wi == NULL) { 686 /* 687 * Gak, what can we do? We have lost an address 688 * change can you say HOSED? 689 */ 690 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 691 /* Opps, must decrement the count */ 692 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 693 if_name); 694 return (NULL); 695 } 696 SCTP_INCR_LADDR_COUNT(); 697 bzero(wi, sizeof(*wi)); 698 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 699 wi->ifa = sctp_ifap; 700 wi->action = SCTP_ADD_IP_ADDRESS; 701 702 SCTP_WQ_ADDR_LOCK(); 703 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 704 SCTP_WQ_ADDR_UNLOCK(); 705 706 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 707 (struct sctp_inpcb *)NULL, 708 (struct sctp_tcb *)NULL, 709 (struct sctp_nets *)NULL); 710 } else { 711 /* it's ready for use */ 712 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 713 } 714 return (sctp_ifap); 715 } 716 717 void 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 719 uint32_t ifn_index, const char *if_name) 720 { 721 struct sctp_vrf *vrf; 722 struct sctp_ifa *sctp_ifap = NULL; 723 724 SCTP_IPI_ADDR_WLOCK(); 725 vrf = sctp_find_vrf(vrf_id); 726 if (vrf == NULL) { 727 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 728 goto out_now; 729 } 730 #ifdef SCTP_DEBUG 731 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 732 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 733 #endif 734 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 735 if (sctp_ifap) { 736 /* Validate the delete */ 737 if (sctp_ifap->ifn_p) { 738 int valid = 0; 739 740 /*- 741 * The name has priority over the ifn_index 742 * if its given. We do this especially for 743 * panda who might recycle indexes fast. 744 */ 745 if (if_name) { 746 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 747 /* They match its a correct delete */ 748 valid = 1; 749 } 750 } 751 if (!valid) { 752 /* last ditch check ifn_index */ 753 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 754 valid = 1; 755 } 756 } 757 if (!valid) { 758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 759 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 760 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 761 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 762 SCTP_IPI_ADDR_WUNLOCK(); 763 return; 764 } 765 } 766 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap); 767 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 768 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 769 vrf->total_ifa_count--; 770 LIST_REMOVE(sctp_ifap, next_bucket); 771 sctp_remove_ifa_from_ifn(sctp_ifap); 772 } 773 #ifdef SCTP_DEBUG 774 else { 775 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 776 ifn_index); 777 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 778 } 779 #endif 780 781 out_now: 782 SCTP_IPI_ADDR_WUNLOCK(); 783 if (sctp_ifap) { 784 struct sctp_laddr *wi; 785 786 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 787 if (wi == NULL) { 788 /* 789 * Gak, what can we do? We have lost an address 790 * change can you say HOSED? 791 */ 792 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 793 794 /* Oops, must decrement the count */ 795 sctp_free_ifa(sctp_ifap); 796 return; 797 } 798 SCTP_INCR_LADDR_COUNT(); 799 bzero(wi, sizeof(*wi)); 800 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 801 wi->ifa = sctp_ifap; 802 wi->action = SCTP_DEL_IP_ADDRESS; 803 SCTP_WQ_ADDR_LOCK(); 804 /* 805 * Should this really be a tailq? As it is we will process 806 * the newest first :-0 807 */ 808 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 809 SCTP_WQ_ADDR_UNLOCK(); 810 811 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 812 (struct sctp_inpcb *)NULL, 813 (struct sctp_tcb *)NULL, 814 (struct sctp_nets *)NULL); 815 } 816 return; 817 } 818 819 820 static struct sctp_tcb * 821 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 822 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 823 { 824 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 825 /* 826 * If we support the TCP model, then we must now dig through to see 827 * if we can find our endpoint in the list of tcp ep's. 828 */ 829 uint16_t lport, rport; 830 struct sctppcbhead *ephead; 831 struct sctp_inpcb *inp; 832 struct sctp_laddr *laddr; 833 struct sctp_tcb *stcb; 834 struct sctp_nets *net; 835 836 if ((to == NULL) || (from == NULL)) { 837 return (NULL); 838 } 839 switch (to->sa_family) { 840 #ifdef INET 841 case AF_INET: 842 if (from->sa_family == AF_INET) { 843 lport = ((struct sockaddr_in *)to)->sin_port; 844 rport = ((struct sockaddr_in *)from)->sin_port; 845 } else { 846 return (NULL); 847 } 848 break; 849 #endif 850 #ifdef INET6 851 case AF_INET6: 852 if (from->sa_family == AF_INET6) { 853 lport = ((struct sockaddr_in6 *)to)->sin6_port; 854 rport = ((struct sockaddr_in6 *)from)->sin6_port; 855 } else { 856 return (NULL); 857 } 858 break; 859 #endif 860 default: 861 return (NULL); 862 } 863 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 864 /* 865 * Ok now for each of the guys in this bucket we must look and see: 866 * - Does the remote port match. - Does there single association's 867 * addresses match this address (to). If so we update p_ep to point 868 * to this ep and return the tcb from it. 869 */ 870 LIST_FOREACH(inp, ephead, sctp_hash) { 871 SCTP_INP_RLOCK(inp); 872 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 873 SCTP_INP_RUNLOCK(inp); 874 continue; 875 } 876 if (lport != inp->sctp_lport) { 877 SCTP_INP_RUNLOCK(inp); 878 continue; 879 } 880 if (inp->def_vrf_id != vrf_id) { 881 SCTP_INP_RUNLOCK(inp); 882 continue; 883 } 884 /* check to see if the ep has one of the addresses */ 885 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 886 /* We are NOT bound all, so look further */ 887 int match = 0; 888 889 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 890 891 if (laddr->ifa == NULL) { 892 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 893 continue; 894 } 895 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 896 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 897 continue; 898 } 899 if (laddr->ifa->address.sa.sa_family == 900 to->sa_family) { 901 /* see if it matches */ 902 903 #ifdef INET 904 if (from->sa_family == AF_INET) { 905 struct sockaddr_in *intf_addr, 906 *sin; 907 908 intf_addr = &laddr->ifa->address.sin; 909 sin = (struct sockaddr_in *)to; 910 if (sin->sin_addr.s_addr == 911 intf_addr->sin_addr.s_addr) { 912 match = 1; 913 break; 914 } 915 } 916 #endif 917 #ifdef INET6 918 if (from->sa_family == AF_INET6) { 919 struct sockaddr_in6 *intf_addr6; 920 struct sockaddr_in6 *sin6; 921 922 sin6 = (struct sockaddr_in6 *) 923 to; 924 intf_addr6 = &laddr->ifa->address.sin6; 925 926 if (SCTP6_ARE_ADDR_EQUAL(sin6, 927 intf_addr6)) { 928 match = 1; 929 break; 930 } 931 } 932 #endif 933 } 934 } 935 if (match == 0) { 936 /* This endpoint does not have this address */ 937 SCTP_INP_RUNLOCK(inp); 938 continue; 939 } 940 } 941 /* 942 * Ok if we hit here the ep has the address, does it hold 943 * the tcb? 944 */ 945 946 stcb = LIST_FIRST(&inp->sctp_asoc_list); 947 if (stcb == NULL) { 948 SCTP_INP_RUNLOCK(inp); 949 continue; 950 } 951 SCTP_TCB_LOCK(stcb); 952 if (stcb->rport != rport) { 953 /* remote port does not match. */ 954 SCTP_TCB_UNLOCK(stcb); 955 SCTP_INP_RUNLOCK(inp); 956 continue; 957 } 958 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 959 SCTP_TCB_UNLOCK(stcb); 960 SCTP_INP_RUNLOCK(inp); 961 continue; 962 } 963 /* Does this TCB have a matching address? */ 964 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 965 966 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 967 /* not the same family, can't be a match */ 968 continue; 969 } 970 switch (from->sa_family) { 971 #ifdef INET 972 case AF_INET: 973 { 974 struct sockaddr_in *sin, *rsin; 975 976 sin = (struct sockaddr_in *)&net->ro._l_addr; 977 rsin = (struct sockaddr_in *)from; 978 if (sin->sin_addr.s_addr == 979 rsin->sin_addr.s_addr) { 980 /* found it */ 981 if (netp != NULL) { 982 *netp = net; 983 } 984 /* 985 * Update the endpoint 986 * pointer 987 */ 988 *inp_p = inp; 989 SCTP_INP_RUNLOCK(inp); 990 return (stcb); 991 } 992 break; 993 } 994 #endif 995 #ifdef INET6 996 case AF_INET6: 997 { 998 struct sockaddr_in6 *sin6, *rsin6; 999 1000 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1001 rsin6 = (struct sockaddr_in6 *)from; 1002 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1003 rsin6)) { 1004 /* found it */ 1005 if (netp != NULL) { 1006 *netp = net; 1007 } 1008 /* 1009 * Update the endpoint 1010 * pointer 1011 */ 1012 *inp_p = inp; 1013 SCTP_INP_RUNLOCK(inp); 1014 return (stcb); 1015 } 1016 break; 1017 } 1018 #endif 1019 default: 1020 /* TSNH */ 1021 break; 1022 } 1023 } 1024 SCTP_TCB_UNLOCK(stcb); 1025 SCTP_INP_RUNLOCK(inp); 1026 } 1027 return (NULL); 1028 } 1029 1030 static int 1031 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1032 { 1033 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1034 int ipv4_addr_legal, ipv6_addr_legal; 1035 struct sctp_vrf *vrf; 1036 struct sctp_ifn *sctp_ifn; 1037 struct sctp_ifa *sctp_ifa; 1038 1039 loopback_scope = stcb->asoc.loopback_scope; 1040 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1041 local_scope = stcb->asoc.local_scope; 1042 site_scope = stcb->asoc.site_scope; 1043 ipv4_addr_legal = ipv6_addr_legal = 0; 1044 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1045 ipv6_addr_legal = 1; 1046 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1047 ipv4_addr_legal = 1; 1048 } 1049 } else { 1050 ipv4_addr_legal = 1; 1051 } 1052 1053 SCTP_IPI_ADDR_RLOCK(); 1054 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1055 if (vrf == NULL) { 1056 /* no vrf, no addresses */ 1057 SCTP_IPI_ADDR_RUNLOCK(); 1058 return (0); 1059 } 1060 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1061 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1062 if ((loopback_scope == 0) && 1063 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1064 continue; 1065 } 1066 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1067 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 1068 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 1069 /* 1070 * We allow pending addresses, where 1071 * we have sent an asconf-add to be 1072 * considered valid. 1073 */ 1074 continue; 1075 } 1076 switch (sctp_ifa->address.sa.sa_family) { 1077 #ifdef INET 1078 case AF_INET: 1079 if (ipv4_addr_legal) { 1080 struct sockaddr_in *sin, 1081 *rsin; 1082 1083 sin = &sctp_ifa->address.sin; 1084 rsin = (struct sockaddr_in *)to; 1085 if ((ipv4_local_scope == 0) && 1086 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1087 continue; 1088 } 1089 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1090 SCTP_IPI_ADDR_RUNLOCK(); 1091 return (1); 1092 } 1093 } 1094 break; 1095 #endif 1096 #ifdef INET6 1097 case AF_INET6: 1098 if (ipv6_addr_legal) { 1099 struct sockaddr_in6 *sin6, 1100 *rsin6; 1101 1102 sin6 = &sctp_ifa->address.sin6; 1103 rsin6 = (struct sockaddr_in6 *)to; 1104 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1105 if (local_scope == 0) 1106 continue; 1107 if (sin6->sin6_scope_id == 0) { 1108 if (sa6_recoverscope(sin6) != 0) 1109 continue; 1110 } 1111 } 1112 if ((site_scope == 0) && 1113 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1114 continue; 1115 } 1116 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1117 SCTP_IPI_ADDR_RUNLOCK(); 1118 return (1); 1119 } 1120 } 1121 break; 1122 #endif 1123 default: 1124 /* TSNH */ 1125 break; 1126 } 1127 } 1128 } 1129 } else { 1130 struct sctp_laddr *laddr; 1131 1132 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1133 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 1134 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 1135 /* 1136 * We allow pending addresses, where we have 1137 * sent an asconf-add to be considered 1138 * valid. 1139 */ 1140 continue; 1141 } 1142 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1143 continue; 1144 } 1145 switch (to->sa_family) { 1146 #ifdef INET 1147 case AF_INET: 1148 { 1149 struct sockaddr_in *sin, *rsin; 1150 1151 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1152 rsin = (struct sockaddr_in *)to; 1153 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1154 SCTP_IPI_ADDR_RUNLOCK(); 1155 return (1); 1156 } 1157 break; 1158 } 1159 #endif 1160 #ifdef INET6 1161 case AF_INET6: 1162 { 1163 struct sockaddr_in6 *sin6, *rsin6; 1164 1165 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1166 rsin6 = (struct sockaddr_in6 *)to; 1167 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1168 SCTP_IPI_ADDR_RUNLOCK(); 1169 return (1); 1170 } 1171 break; 1172 } 1173 1174 #endif 1175 default: 1176 /* TSNH */ 1177 break; 1178 } 1179 1180 } 1181 } 1182 SCTP_IPI_ADDR_RUNLOCK(); 1183 return (0); 1184 } 1185 1186 /* 1187 * rules for use 1188 * 1189 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1190 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1191 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1192 * NULL. 1193 */ 1194 1195 struct sctp_tcb * 1196 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1197 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1198 { 1199 struct sctpasochead *head; 1200 struct sctp_inpcb *inp; 1201 struct sctp_tcb *stcb = NULL; 1202 struct sctp_nets *net; 1203 uint16_t rport; 1204 1205 inp = *inp_p; 1206 if (remote->sa_family == AF_INET) { 1207 rport = (((struct sockaddr_in *)remote)->sin_port); 1208 } else if (remote->sa_family == AF_INET6) { 1209 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1210 } else { 1211 return (NULL); 1212 } 1213 if (locked_tcb) { 1214 /* 1215 * UN-lock so we can do proper locking here this occurs when 1216 * called from load_addresses_from_init. 1217 */ 1218 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1219 SCTP_TCB_UNLOCK(locked_tcb); 1220 } 1221 SCTP_INP_INFO_RLOCK(); 1222 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1223 /*- 1224 * Now either this guy is our listener or it's the 1225 * connector. If it is the one that issued the connect, then 1226 * it's only chance is to be the first TCB in the list. If 1227 * it is the acceptor, then do the special_lookup to hash 1228 * and find the real inp. 1229 */ 1230 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1231 /* to is peer addr, from is my addr */ 1232 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1233 netp, inp->def_vrf_id); 1234 if ((stcb != NULL) && (locked_tcb == NULL)) { 1235 /* we have a locked tcb, lower refcount */ 1236 SCTP_INP_DECR_REF(inp); 1237 } 1238 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1239 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1240 SCTP_TCB_LOCK(locked_tcb); 1241 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1242 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1243 } 1244 SCTP_INP_INFO_RUNLOCK(); 1245 return (stcb); 1246 } else { 1247 SCTP_INP_WLOCK(inp); 1248 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1249 goto null_return; 1250 } 1251 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1252 if (stcb == NULL) { 1253 goto null_return; 1254 } 1255 SCTP_TCB_LOCK(stcb); 1256 1257 if (stcb->rport != rport) { 1258 /* remote port does not match. */ 1259 SCTP_TCB_UNLOCK(stcb); 1260 goto null_return; 1261 } 1262 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1263 SCTP_TCB_UNLOCK(stcb); 1264 goto null_return; 1265 } 1266 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1267 SCTP_TCB_UNLOCK(stcb); 1268 goto null_return; 1269 } 1270 /* now look at the list of remote addresses */ 1271 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1272 #ifdef INVARIANTS 1273 if (net == (TAILQ_NEXT(net, sctp_next))) { 1274 panic("Corrupt net list"); 1275 } 1276 #endif 1277 if (net->ro._l_addr.sa.sa_family != 1278 remote->sa_family) { 1279 /* not the same family */ 1280 continue; 1281 } 1282 switch (remote->sa_family) { 1283 #ifdef INET 1284 case AF_INET: 1285 { 1286 struct sockaddr_in *sin, 1287 *rsin; 1288 1289 sin = (struct sockaddr_in *) 1290 &net->ro._l_addr; 1291 rsin = (struct sockaddr_in *)remote; 1292 if (sin->sin_addr.s_addr == 1293 rsin->sin_addr.s_addr) { 1294 /* found it */ 1295 if (netp != NULL) { 1296 *netp = net; 1297 } 1298 if (locked_tcb == NULL) { 1299 SCTP_INP_DECR_REF(inp); 1300 } else if (locked_tcb != stcb) { 1301 SCTP_TCB_LOCK(locked_tcb); 1302 } 1303 if (locked_tcb) { 1304 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1305 } 1306 SCTP_INP_WUNLOCK(inp); 1307 SCTP_INP_INFO_RUNLOCK(); 1308 return (stcb); 1309 } 1310 break; 1311 } 1312 #endif 1313 #ifdef INET6 1314 case AF_INET6: 1315 { 1316 struct sockaddr_in6 *sin6, 1317 *rsin6; 1318 1319 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1320 rsin6 = (struct sockaddr_in6 *)remote; 1321 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1322 rsin6)) { 1323 /* found it */ 1324 if (netp != NULL) { 1325 *netp = net; 1326 } 1327 if (locked_tcb == NULL) { 1328 SCTP_INP_DECR_REF(inp); 1329 } else if (locked_tcb != stcb) { 1330 SCTP_TCB_LOCK(locked_tcb); 1331 } 1332 if (locked_tcb) { 1333 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1334 } 1335 SCTP_INP_WUNLOCK(inp); 1336 SCTP_INP_INFO_RUNLOCK(); 1337 return (stcb); 1338 } 1339 break; 1340 } 1341 #endif 1342 default: 1343 /* TSNH */ 1344 break; 1345 } 1346 } 1347 SCTP_TCB_UNLOCK(stcb); 1348 } 1349 } else { 1350 SCTP_INP_WLOCK(inp); 1351 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1352 goto null_return; 1353 } 1354 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1355 inp->sctp_hashmark)]; 1356 if (head == NULL) { 1357 goto null_return; 1358 } 1359 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1360 if (stcb->rport != rport) { 1361 /* remote port does not match */ 1362 continue; 1363 } 1364 SCTP_TCB_LOCK(stcb); 1365 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1366 SCTP_TCB_UNLOCK(stcb); 1367 continue; 1368 } 1369 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1370 SCTP_TCB_UNLOCK(stcb); 1371 continue; 1372 } 1373 /* now look at the list of remote addresses */ 1374 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1375 #ifdef INVARIANTS 1376 if (net == (TAILQ_NEXT(net, sctp_next))) { 1377 panic("Corrupt net list"); 1378 } 1379 #endif 1380 if (net->ro._l_addr.sa.sa_family != 1381 remote->sa_family) { 1382 /* not the same family */ 1383 continue; 1384 } 1385 switch (remote->sa_family) { 1386 #ifdef INET 1387 case AF_INET: 1388 { 1389 struct sockaddr_in *sin, 1390 *rsin; 1391 1392 sin = (struct sockaddr_in *) 1393 &net->ro._l_addr; 1394 rsin = (struct sockaddr_in *)remote; 1395 if (sin->sin_addr.s_addr == 1396 rsin->sin_addr.s_addr) { 1397 /* found it */ 1398 if (netp != NULL) { 1399 *netp = net; 1400 } 1401 if (locked_tcb == NULL) { 1402 SCTP_INP_DECR_REF(inp); 1403 } else if (locked_tcb != stcb) { 1404 SCTP_TCB_LOCK(locked_tcb); 1405 } 1406 if (locked_tcb) { 1407 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1408 } 1409 SCTP_INP_WUNLOCK(inp); 1410 SCTP_INP_INFO_RUNLOCK(); 1411 return (stcb); 1412 } 1413 break; 1414 } 1415 #endif 1416 #ifdef INET6 1417 case AF_INET6: 1418 { 1419 struct sockaddr_in6 *sin6, 1420 *rsin6; 1421 1422 sin6 = (struct sockaddr_in6 *) 1423 &net->ro._l_addr; 1424 rsin6 = (struct sockaddr_in6 *)remote; 1425 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1426 rsin6)) { 1427 /* found it */ 1428 if (netp != NULL) { 1429 *netp = net; 1430 } 1431 if (locked_tcb == NULL) { 1432 SCTP_INP_DECR_REF(inp); 1433 } else if (locked_tcb != stcb) { 1434 SCTP_TCB_LOCK(locked_tcb); 1435 } 1436 if (locked_tcb) { 1437 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1438 } 1439 SCTP_INP_WUNLOCK(inp); 1440 SCTP_INP_INFO_RUNLOCK(); 1441 return (stcb); 1442 } 1443 break; 1444 } 1445 #endif 1446 default: 1447 /* TSNH */ 1448 break; 1449 } 1450 } 1451 SCTP_TCB_UNLOCK(stcb); 1452 } 1453 } 1454 null_return: 1455 /* clean up for returning null */ 1456 if (locked_tcb) { 1457 SCTP_TCB_LOCK(locked_tcb); 1458 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1459 } 1460 SCTP_INP_WUNLOCK(inp); 1461 SCTP_INP_INFO_RUNLOCK(); 1462 /* not found */ 1463 return (NULL); 1464 } 1465 1466 /* 1467 * Find an association for a specific endpoint using the association id given 1468 * out in the COMM_UP notification 1469 */ 1470 1471 struct sctp_tcb * 1472 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1473 { 1474 /* 1475 * Use my the assoc_id to find a endpoint 1476 */ 1477 struct sctpasochead *head; 1478 struct sctp_tcb *stcb; 1479 uint32_t id; 1480 1481 if (inp == NULL) { 1482 SCTP_PRINTF("TSNH ep_associd\n"); 1483 return (NULL); 1484 } 1485 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1486 SCTP_PRINTF("TSNH ep_associd0\n"); 1487 return (NULL); 1488 } 1489 id = (uint32_t) asoc_id; 1490 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1491 if (head == NULL) { 1492 /* invalid id TSNH */ 1493 SCTP_PRINTF("TSNH ep_associd1\n"); 1494 return (NULL); 1495 } 1496 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1497 if (stcb->asoc.assoc_id == id) { 1498 if (inp != stcb->sctp_ep) { 1499 /* 1500 * some other guy has the same id active (id 1501 * collision ??). 1502 */ 1503 SCTP_PRINTF("TSNH ep_associd2\n"); 1504 continue; 1505 } 1506 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1507 continue; 1508 } 1509 if (want_lock) { 1510 SCTP_TCB_LOCK(stcb); 1511 } 1512 return (stcb); 1513 } 1514 } 1515 return (NULL); 1516 } 1517 1518 1519 struct sctp_tcb * 1520 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1521 { 1522 struct sctp_tcb *stcb; 1523 1524 SCTP_INP_RLOCK(inp); 1525 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1526 SCTP_INP_RUNLOCK(inp); 1527 return (stcb); 1528 } 1529 1530 1531 static struct sctp_inpcb * 1532 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1533 uint16_t lport, uint32_t vrf_id) 1534 { 1535 struct sctp_inpcb *inp; 1536 struct sctp_laddr *laddr; 1537 1538 #ifdef INET 1539 struct sockaddr_in *sin; 1540 1541 #endif 1542 #ifdef INET6 1543 struct sockaddr_in6 *sin6; 1544 struct sockaddr_in6 *intf_addr6; 1545 1546 #endif 1547 1548 int fnd; 1549 1550 /* 1551 * Endpoint probe expects that the INP_INFO is locked. 1552 */ 1553 #ifdef INET 1554 sin = NULL; 1555 #endif 1556 #ifdef INET6 1557 sin6 = NULL; 1558 #endif 1559 switch (nam->sa_family) { 1560 #ifdef INET 1561 case AF_INET: 1562 sin = (struct sockaddr_in *)nam; 1563 break; 1564 #endif 1565 #ifdef INET6 1566 case AF_INET6: 1567 sin6 = (struct sockaddr_in6 *)nam; 1568 break; 1569 #endif 1570 default: 1571 /* unsupported family */ 1572 return (NULL); 1573 } 1574 1575 if (head == NULL) 1576 return (NULL); 1577 1578 LIST_FOREACH(inp, head, sctp_hash) { 1579 SCTP_INP_RLOCK(inp); 1580 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1581 SCTP_INP_RUNLOCK(inp); 1582 continue; 1583 } 1584 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1585 (inp->sctp_lport == lport)) { 1586 /* got it */ 1587 #ifdef INET 1588 if ((nam->sa_family == AF_INET) && 1589 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1590 SCTP_IPV6_V6ONLY(inp)) { 1591 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1592 SCTP_INP_RUNLOCK(inp); 1593 continue; 1594 } 1595 #endif 1596 #ifdef INET6 1597 /* A V6 address and the endpoint is NOT bound V6 */ 1598 if (nam->sa_family == AF_INET6 && 1599 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1600 SCTP_INP_RUNLOCK(inp); 1601 continue; 1602 } 1603 #endif 1604 /* does a VRF id match? */ 1605 fnd = 0; 1606 if (inp->def_vrf_id == vrf_id) 1607 fnd = 1; 1608 1609 SCTP_INP_RUNLOCK(inp); 1610 if (!fnd) 1611 continue; 1612 return (inp); 1613 } 1614 SCTP_INP_RUNLOCK(inp); 1615 } 1616 switch (nam->sa_family) { 1617 #ifdef INET 1618 case AF_INET: 1619 if (sin->sin_addr.s_addr == INADDR_ANY) { 1620 /* Can't hunt for one that has no address specified */ 1621 return (NULL); 1622 } 1623 break; 1624 #endif 1625 #ifdef INET6 1626 case AF_INET6: 1627 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1628 /* Can't hunt for one that has no address specified */ 1629 return (NULL); 1630 } 1631 break; 1632 #endif 1633 default: 1634 break; 1635 } 1636 /* 1637 * ok, not bound to all so see if we can find a EP bound to this 1638 * address. 1639 */ 1640 LIST_FOREACH(inp, head, sctp_hash) { 1641 SCTP_INP_RLOCK(inp); 1642 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1643 SCTP_INP_RUNLOCK(inp); 1644 continue; 1645 } 1646 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1647 SCTP_INP_RUNLOCK(inp); 1648 continue; 1649 } 1650 /* 1651 * Ok this could be a likely candidate, look at all of its 1652 * addresses 1653 */ 1654 if (inp->sctp_lport != lport) { 1655 SCTP_INP_RUNLOCK(inp); 1656 continue; 1657 } 1658 /* does a VRF id match? */ 1659 fnd = 0; 1660 if (inp->def_vrf_id == vrf_id) 1661 fnd = 1; 1662 1663 if (!fnd) { 1664 SCTP_INP_RUNLOCK(inp); 1665 continue; 1666 } 1667 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1668 if (laddr->ifa == NULL) { 1669 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1670 __FUNCTION__); 1671 continue; 1672 } 1673 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1674 laddr->ifa); 1675 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1676 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1677 continue; 1678 } 1679 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1680 /* possible, see if it matches */ 1681 switch (nam->sa_family) { 1682 #ifdef INET 1683 case AF_INET: 1684 if (sin->sin_addr.s_addr == 1685 laddr->ifa->address.sin.sin_addr.s_addr) { 1686 SCTP_INP_RUNLOCK(inp); 1687 return (inp); 1688 } 1689 break; 1690 #endif 1691 #ifdef INET6 1692 case AF_INET6: 1693 intf_addr6 = &laddr->ifa->address.sin6; 1694 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1695 intf_addr6)) { 1696 SCTP_INP_RUNLOCK(inp); 1697 return (inp); 1698 } 1699 break; 1700 #endif 1701 } 1702 } 1703 } 1704 SCTP_INP_RUNLOCK(inp); 1705 } 1706 return (NULL); 1707 } 1708 1709 1710 static struct sctp_inpcb * 1711 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1712 { 1713 struct sctppcbhead *head; 1714 struct sctp_inpcb *t_inp; 1715 int fnd; 1716 1717 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1718 SCTP_BASE_INFO(hashmark))]; 1719 LIST_FOREACH(t_inp, head, sctp_hash) { 1720 if (t_inp->sctp_lport != lport) { 1721 continue; 1722 } 1723 /* is it in the VRF in question */ 1724 fnd = 0; 1725 if (t_inp->def_vrf_id == vrf_id) 1726 fnd = 1; 1727 if (!fnd) 1728 continue; 1729 1730 /* This one is in use. */ 1731 /* check the v6/v4 binding issue */ 1732 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1733 SCTP_IPV6_V6ONLY(t_inp)) { 1734 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1735 /* collision in V6 space */ 1736 return (t_inp); 1737 } else { 1738 /* inp is BOUND_V4 no conflict */ 1739 continue; 1740 } 1741 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1742 /* t_inp is bound v4 and v6, conflict always */ 1743 return (t_inp); 1744 } else { 1745 /* t_inp is bound only V4 */ 1746 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1747 SCTP_IPV6_V6ONLY(inp)) { 1748 /* no conflict */ 1749 continue; 1750 } 1751 /* else fall through to conflict */ 1752 } 1753 return (t_inp); 1754 } 1755 return (NULL); 1756 } 1757 1758 1759 int 1760 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1761 { 1762 /* For 1-2-1 with port reuse */ 1763 struct sctppcbhead *head; 1764 struct sctp_inpcb *tinp; 1765 1766 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1767 /* only works with port reuse on */ 1768 return (-1); 1769 } 1770 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1771 return (0); 1772 } 1773 SCTP_INP_RUNLOCK(inp); 1774 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1775 SCTP_BASE_INFO(hashmark))]; 1776 /* Kick out all non-listeners to the TCP hash */ 1777 LIST_FOREACH(tinp, head, sctp_hash) { 1778 if (tinp->sctp_lport != inp->sctp_lport) { 1779 continue; 1780 } 1781 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1782 continue; 1783 } 1784 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1785 continue; 1786 } 1787 if (tinp->sctp_socket->so_qlimit) { 1788 continue; 1789 } 1790 SCTP_INP_WLOCK(tinp); 1791 LIST_REMOVE(tinp, sctp_hash); 1792 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1793 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1794 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1795 SCTP_INP_WUNLOCK(tinp); 1796 } 1797 SCTP_INP_WLOCK(inp); 1798 /* Pull from where he was */ 1799 LIST_REMOVE(inp, sctp_hash); 1800 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1801 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1802 LIST_INSERT_HEAD(head, inp, sctp_hash); 1803 SCTP_INP_WUNLOCK(inp); 1804 SCTP_INP_RLOCK(inp); 1805 return (0); 1806 } 1807 1808 1809 struct sctp_inpcb * 1810 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1811 uint32_t vrf_id) 1812 { 1813 /* 1814 * First we check the hash table to see if someone has this port 1815 * bound with just the port. 1816 */ 1817 struct sctp_inpcb *inp; 1818 struct sctppcbhead *head; 1819 int lport; 1820 unsigned int i; 1821 1822 #ifdef INET 1823 struct sockaddr_in *sin; 1824 1825 #endif 1826 #ifdef INET6 1827 struct sockaddr_in6 *sin6; 1828 1829 #endif 1830 1831 switch (nam->sa_family) { 1832 #ifdef INET 1833 case AF_INET: 1834 sin = (struct sockaddr_in *)nam; 1835 lport = sin->sin_port; 1836 break; 1837 #endif 1838 #ifdef INET6 1839 case AF_INET6: 1840 sin6 = (struct sockaddr_in6 *)nam; 1841 lport = sin6->sin6_port; 1842 break; 1843 #endif 1844 default: 1845 return (NULL); 1846 } 1847 /* 1848 * I could cheat here and just cast to one of the types but we will 1849 * do it right. It also provides the check against an Unsupported 1850 * type too. 1851 */ 1852 /* Find the head of the ALLADDR chain */ 1853 if (have_lock == 0) { 1854 SCTP_INP_INFO_RLOCK(); 1855 } 1856 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1857 SCTP_BASE_INFO(hashmark))]; 1858 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1859 1860 /* 1861 * If the TCP model exists it could be that the main listening 1862 * endpoint is gone but there still exists a connected socket for 1863 * this guy. If so we can return the first one that we find. This 1864 * may NOT be the correct one so the caller should be wary on the 1865 * returned INP. Currently the only caller that sets find_tcp_pool 1866 * is in bindx where we are verifying that a user CAN bind the 1867 * address. He either has bound it already, or someone else has, or 1868 * its open to bind, so this is good enough. 1869 */ 1870 if (inp == NULL && find_tcp_pool) { 1871 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1872 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1873 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1874 if (inp) { 1875 break; 1876 } 1877 } 1878 } 1879 if (inp) { 1880 SCTP_INP_INCR_REF(inp); 1881 } 1882 if (have_lock == 0) { 1883 SCTP_INP_INFO_RUNLOCK(); 1884 } 1885 return (inp); 1886 } 1887 1888 /* 1889 * Find an association for an endpoint with the pointer to whom you want to 1890 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1891 * need to change the *to to some other struct like a mbuf... 1892 */ 1893 struct sctp_tcb * 1894 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1895 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1896 uint32_t vrf_id) 1897 { 1898 struct sctp_inpcb *inp = NULL; 1899 struct sctp_tcb *retval; 1900 1901 SCTP_INP_INFO_RLOCK(); 1902 if (find_tcp_pool) { 1903 if (inp_p != NULL) { 1904 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1905 vrf_id); 1906 } else { 1907 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1908 vrf_id); 1909 } 1910 if (retval != NULL) { 1911 SCTP_INP_INFO_RUNLOCK(); 1912 return (retval); 1913 } 1914 } 1915 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1916 if (inp_p != NULL) { 1917 *inp_p = inp; 1918 } 1919 SCTP_INP_INFO_RUNLOCK(); 1920 1921 if (inp == NULL) { 1922 return (NULL); 1923 } 1924 /* 1925 * ok, we have an endpoint, now lets find the assoc for it (if any) 1926 * we now place the source address or from in the to of the find 1927 * endpoint call. Since in reality this chain is used from the 1928 * inbound packet side. 1929 */ 1930 if (inp_p != NULL) { 1931 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1932 NULL); 1933 } else { 1934 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1935 NULL); 1936 } 1937 return retval; 1938 } 1939 1940 1941 /* 1942 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1943 * find all addresses that the sender has specified in any address list. Each 1944 * address will be used to lookup the TCB and see if one exits. 1945 */ 1946 static struct sctp_tcb * 1947 sctp_findassociation_special_addr(struct mbuf *m, int offset, 1948 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1949 struct sockaddr *dest) 1950 { 1951 struct sctp_paramhdr *phdr, parm_buf; 1952 struct sctp_tcb *retval; 1953 uint32_t ptype, plen; 1954 1955 #ifdef INET 1956 struct sockaddr_in sin4; 1957 1958 #endif 1959 #ifdef INET6 1960 struct sockaddr_in6 sin6; 1961 1962 #endif 1963 1964 #ifdef INET 1965 memset(&sin4, 0, sizeof(sin4)); 1966 sin4.sin_len = sizeof(sin4); 1967 sin4.sin_family = AF_INET; 1968 sin4.sin_port = sh->src_port; 1969 #endif 1970 #ifdef INET6 1971 memset(&sin6, 0, sizeof(sin6)); 1972 sin6.sin6_len = sizeof(sin6); 1973 sin6.sin6_family = AF_INET6; 1974 sin6.sin6_port = sh->src_port; 1975 #endif 1976 1977 retval = NULL; 1978 offset += sizeof(struct sctp_init_chunk); 1979 1980 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1981 while (phdr != NULL) { 1982 /* now we must see if we want the parameter */ 1983 ptype = ntohs(phdr->param_type); 1984 plen = ntohs(phdr->param_length); 1985 if (plen == 0) { 1986 break; 1987 } 1988 #ifdef INET 1989 if (ptype == SCTP_IPV4_ADDRESS && 1990 plen == sizeof(struct sctp_ipv4addr_param)) { 1991 /* Get the rest of the address */ 1992 struct sctp_ipv4addr_param ip4_parm, *p4; 1993 1994 phdr = sctp_get_next_param(m, offset, 1995 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1996 if (phdr == NULL) { 1997 return (NULL); 1998 } 1999 p4 = (struct sctp_ipv4addr_param *)phdr; 2000 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2001 /* look it up */ 2002 retval = sctp_findassociation_ep_addr(inp_p, 2003 (struct sockaddr *)&sin4, netp, dest, NULL); 2004 if (retval != NULL) { 2005 return (retval); 2006 } 2007 } 2008 #endif 2009 #ifdef INET6 2010 if (ptype == SCTP_IPV6_ADDRESS && 2011 plen == sizeof(struct sctp_ipv6addr_param)) { 2012 /* Get the rest of the address */ 2013 struct sctp_ipv6addr_param ip6_parm, *p6; 2014 2015 phdr = sctp_get_next_param(m, offset, 2016 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2017 if (phdr == NULL) { 2018 return (NULL); 2019 } 2020 p6 = (struct sctp_ipv6addr_param *)phdr; 2021 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2022 /* look it up */ 2023 retval = sctp_findassociation_ep_addr(inp_p, 2024 (struct sockaddr *)&sin6, netp, dest, NULL); 2025 if (retval != NULL) { 2026 return (retval); 2027 } 2028 } 2029 #endif 2030 offset += SCTP_SIZE32(plen); 2031 phdr = sctp_get_next_param(m, offset, &parm_buf, 2032 sizeof(parm_buf)); 2033 } 2034 return (NULL); 2035 } 2036 2037 static struct sctp_tcb * 2038 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2039 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2040 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2041 { 2042 /* 2043 * Use my vtag to hash. If we find it we then verify the source addr 2044 * is in the assoc. If all goes well we save a bit on rec of a 2045 * packet. 2046 */ 2047 struct sctpasochead *head; 2048 struct sctp_nets *net; 2049 struct sctp_tcb *stcb; 2050 2051 *netp = NULL; 2052 *inp_p = NULL; 2053 SCTP_INP_INFO_RLOCK(); 2054 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2055 SCTP_BASE_INFO(hashasocmark))]; 2056 if (head == NULL) { 2057 /* invalid vtag */ 2058 SCTP_INP_INFO_RUNLOCK(); 2059 return (NULL); 2060 } 2061 LIST_FOREACH(stcb, head, sctp_asocs) { 2062 SCTP_INP_RLOCK(stcb->sctp_ep); 2063 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2064 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2065 continue; 2066 } 2067 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2068 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2069 continue; 2070 } 2071 SCTP_TCB_LOCK(stcb); 2072 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2073 if (stcb->asoc.my_vtag == vtag) { 2074 /* candidate */ 2075 if (stcb->rport != rport) { 2076 SCTP_TCB_UNLOCK(stcb); 2077 continue; 2078 } 2079 if (stcb->sctp_ep->sctp_lport != lport) { 2080 SCTP_TCB_UNLOCK(stcb); 2081 continue; 2082 } 2083 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2084 SCTP_TCB_UNLOCK(stcb); 2085 continue; 2086 } 2087 /* RRS:Need toaddr check here */ 2088 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2089 /* Endpoint does not own this address */ 2090 SCTP_TCB_UNLOCK(stcb); 2091 continue; 2092 } 2093 if (remote_tag) { 2094 /* 2095 * If we have both vtags that's all we match 2096 * on 2097 */ 2098 if (stcb->asoc.peer_vtag == remote_tag) { 2099 /* 2100 * If both tags match we consider it 2101 * conclusive and check NO 2102 * source/destination addresses 2103 */ 2104 goto conclusive; 2105 } 2106 } 2107 if (skip_src_check) { 2108 conclusive: 2109 if (from) { 2110 *netp = sctp_findnet(stcb, from); 2111 } else { 2112 *netp = NULL; /* unknown */ 2113 } 2114 if (inp_p) 2115 *inp_p = stcb->sctp_ep; 2116 SCTP_INP_INFO_RUNLOCK(); 2117 return (stcb); 2118 } 2119 net = sctp_findnet(stcb, from); 2120 if (net) { 2121 /* yep its him. */ 2122 *netp = net; 2123 SCTP_STAT_INCR(sctps_vtagexpress); 2124 *inp_p = stcb->sctp_ep; 2125 SCTP_INP_INFO_RUNLOCK(); 2126 return (stcb); 2127 } else { 2128 /* 2129 * not him, this should only happen in rare 2130 * cases so I peg it. 2131 */ 2132 SCTP_STAT_INCR(sctps_vtagbogus); 2133 } 2134 } 2135 SCTP_TCB_UNLOCK(stcb); 2136 } 2137 SCTP_INP_INFO_RUNLOCK(); 2138 return (NULL); 2139 } 2140 2141 /* 2142 * Find an association with the pointer to the inbound IP packet. This can be 2143 * a IPv4 or IPv6 packet. 2144 */ 2145 struct sctp_tcb * 2146 sctp_findassociation_addr(struct mbuf *m, int offset, 2147 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2148 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2149 { 2150 int find_tcp_pool; 2151 struct ip *iph; 2152 struct sctp_tcb *retval; 2153 struct sockaddr_storage to_store, from_store; 2154 struct sockaddr *to = (struct sockaddr *)&to_store; 2155 struct sockaddr *from = (struct sockaddr *)&from_store; 2156 struct sctp_inpcb *inp; 2157 2158 iph = mtod(m, struct ip *); 2159 switch (iph->ip_v) { 2160 #ifdef INET 2161 case IPVERSION: 2162 { 2163 /* its IPv4 */ 2164 struct sockaddr_in *from4; 2165 2166 from4 = (struct sockaddr_in *)&from_store; 2167 bzero(from4, sizeof(*from4)); 2168 from4->sin_family = AF_INET; 2169 from4->sin_len = sizeof(struct sockaddr_in); 2170 from4->sin_addr.s_addr = iph->ip_src.s_addr; 2171 from4->sin_port = sh->src_port; 2172 break; 2173 } 2174 #endif 2175 #ifdef INET6 2176 case IPV6_VERSION >> 4: 2177 { 2178 /* its IPv6 */ 2179 struct ip6_hdr *ip6; 2180 struct sockaddr_in6 *from6; 2181 2182 ip6 = mtod(m, struct ip6_hdr *); 2183 from6 = (struct sockaddr_in6 *)&from_store; 2184 bzero(from6, sizeof(*from6)); 2185 from6->sin6_family = AF_INET6; 2186 from6->sin6_len = sizeof(struct sockaddr_in6); 2187 from6->sin6_addr = ip6->ip6_src; 2188 from6->sin6_port = sh->src_port; 2189 /* Get the scopes in properly to the sin6 addr's */ 2190 sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone)); 2191 break; 2192 } 2193 #endif 2194 default: 2195 /* Currently not supported. */ 2196 return (NULL); 2197 } 2198 2199 2200 switch (iph->ip_v) { 2201 #ifdef INET 2202 case IPVERSION: 2203 { 2204 /* its IPv4 */ 2205 struct sockaddr_in *to4; 2206 2207 to4 = (struct sockaddr_in *)&to_store; 2208 bzero(to4, sizeof(*to4)); 2209 to4->sin_family = AF_INET; 2210 to4->sin_len = sizeof(struct sockaddr_in); 2211 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2212 to4->sin_port = sh->dest_port; 2213 break; 2214 } 2215 #endif 2216 #ifdef INET6 2217 case IPV6_VERSION >> 4: 2218 { 2219 /* its IPv6 */ 2220 struct ip6_hdr *ip6; 2221 struct sockaddr_in6 *to6; 2222 2223 ip6 = mtod(m, struct ip6_hdr *); 2224 to6 = (struct sockaddr_in6 *)&to_store; 2225 bzero(to6, sizeof(*to6)); 2226 to6->sin6_family = AF_INET6; 2227 to6->sin6_len = sizeof(struct sockaddr_in6); 2228 to6->sin6_addr = ip6->ip6_dst; 2229 to6->sin6_port = sh->dest_port; 2230 /* Get the scopes in properly to the sin6 addr's */ 2231 sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone)); 2232 break; 2233 } 2234 #endif 2235 default: 2236 /* TSNH */ 2237 break; 2238 } 2239 if (sh->v_tag) { 2240 /* we only go down this path if vtag is non-zero */ 2241 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag), 2242 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2243 if (retval) { 2244 return (retval); 2245 } 2246 } 2247 find_tcp_pool = 0; 2248 if ((ch->chunk_type != SCTP_INITIATION) && 2249 (ch->chunk_type != SCTP_INITIATION_ACK) && 2250 (ch->chunk_type != SCTP_COOKIE_ACK) && 2251 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2252 /* Other chunk types go to the tcp pool. */ 2253 find_tcp_pool = 1; 2254 } 2255 if (inp_p) { 2256 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2257 find_tcp_pool, vrf_id); 2258 inp = *inp_p; 2259 } else { 2260 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2261 find_tcp_pool, vrf_id); 2262 } 2263 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2264 if (retval == NULL && inp) { 2265 /* Found a EP but not this address */ 2266 if ((ch->chunk_type == SCTP_INITIATION) || 2267 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2268 /*- 2269 * special hook, we do NOT return linp or an 2270 * association that is linked to an existing 2271 * association that is under the TCP pool (i.e. no 2272 * listener exists). The endpoint finding routine 2273 * will always find a listener before examining the 2274 * TCP pool. 2275 */ 2276 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2277 if (inp_p) { 2278 *inp_p = NULL; 2279 } 2280 return (NULL); 2281 } 2282 retval = sctp_findassociation_special_addr(m, 2283 offset, sh, &inp, netp, to); 2284 if (inp_p != NULL) { 2285 *inp_p = inp; 2286 } 2287 } 2288 } 2289 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2290 return (retval); 2291 } 2292 2293 /* 2294 * lookup an association by an ASCONF lookup address. 2295 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2296 */ 2297 struct sctp_tcb * 2298 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2299 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2300 { 2301 struct sctp_tcb *stcb; 2302 struct sockaddr_storage local_store, remote_store; 2303 struct sockaddr *to; 2304 struct ip *iph; 2305 struct sctp_paramhdr parm_buf, *phdr; 2306 int ptype; 2307 int zero_address = 0; 2308 2309 #ifdef INET 2310 struct sockaddr_in *sin; 2311 2312 #endif 2313 #ifdef INET6 2314 struct ip6_hdr *ip6; 2315 struct sockaddr_in6 *sin6; 2316 2317 #endif 2318 2319 memset(&local_store, 0, sizeof(local_store)); 2320 memset(&remote_store, 0, sizeof(remote_store)); 2321 to = (struct sockaddr *)&local_store; 2322 /* First get the destination address setup too. */ 2323 iph = mtod(m, struct ip *); 2324 switch (iph->ip_v) { 2325 #ifdef INET 2326 case IPVERSION: 2327 /* its IPv4 */ 2328 sin = (struct sockaddr_in *)&local_store; 2329 sin->sin_family = AF_INET; 2330 sin->sin_len = sizeof(*sin); 2331 sin->sin_port = sh->dest_port; 2332 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2333 break; 2334 #endif 2335 #ifdef INET6 2336 case IPV6_VERSION >> 4: 2337 /* its IPv6 */ 2338 ip6 = mtod(m, struct ip6_hdr *); 2339 sin6 = (struct sockaddr_in6 *)&local_store; 2340 sin6->sin6_family = AF_INET6; 2341 sin6->sin6_len = sizeof(*sin6); 2342 sin6->sin6_port = sh->dest_port; 2343 sin6->sin6_addr = ip6->ip6_dst; 2344 break; 2345 #endif 2346 default: 2347 return NULL; 2348 } 2349 2350 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2351 &parm_buf, sizeof(struct sctp_paramhdr)); 2352 if (phdr == NULL) { 2353 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2354 __FUNCTION__); 2355 return NULL; 2356 } 2357 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2358 /* get the correlation address */ 2359 switch (ptype) { 2360 #ifdef INET6 2361 case SCTP_IPV6_ADDRESS: 2362 { 2363 /* ipv6 address param */ 2364 struct sctp_ipv6addr_param *p6, p6_buf; 2365 2366 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2367 return NULL; 2368 } 2369 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2370 offset + sizeof(struct sctp_asconf_chunk), 2371 &p6_buf.ph, sizeof(*p6)); 2372 if (p6 == NULL) { 2373 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2374 __FUNCTION__); 2375 return (NULL); 2376 } 2377 sin6 = (struct sockaddr_in6 *)&remote_store; 2378 sin6->sin6_family = AF_INET6; 2379 sin6->sin6_len = sizeof(*sin6); 2380 sin6->sin6_port = sh->src_port; 2381 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2382 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2383 zero_address = 1; 2384 break; 2385 } 2386 #endif 2387 #ifdef INET 2388 case SCTP_IPV4_ADDRESS: 2389 { 2390 /* ipv4 address param */ 2391 struct sctp_ipv4addr_param *p4, p4_buf; 2392 2393 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2394 return NULL; 2395 } 2396 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2397 offset + sizeof(struct sctp_asconf_chunk), 2398 &p4_buf.ph, sizeof(*p4)); 2399 if (p4 == NULL) { 2400 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2401 __FUNCTION__); 2402 return (NULL); 2403 } 2404 sin = (struct sockaddr_in *)&remote_store; 2405 sin->sin_family = AF_INET; 2406 sin->sin_len = sizeof(*sin); 2407 sin->sin_port = sh->src_port; 2408 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2409 if (sin->sin_addr.s_addr == INADDR_ANY) 2410 zero_address = 1; 2411 break; 2412 } 2413 #endif 2414 default: 2415 /* invalid address param type */ 2416 return NULL; 2417 } 2418 2419 if (zero_address) { 2420 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p, 2421 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2422 /* 2423 * SCTP_PRINTF("findassociation_ep_asconf: zero lookup 2424 * address finds stcb 0x%x\n", (uint32_t)stcb); 2425 */ 2426 } else { 2427 stcb = sctp_findassociation_ep_addr(inp_p, 2428 (struct sockaddr *)&remote_store, netp, 2429 to, NULL); 2430 } 2431 return (stcb); 2432 } 2433 2434 2435 /* 2436 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2437 * addresses. This way if we don't get a bind we by default pick a ephemeral 2438 * port with all addresses bound. 2439 */ 2440 int 2441 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2442 { 2443 /* 2444 * we get called when a new endpoint starts up. We need to allocate 2445 * the sctp_inpcb structure from the zone and init it. Mark it as 2446 * unbound and find a port that we can use as an ephemeral with 2447 * INADDR_ANY. If the user binds later no problem we can then add in 2448 * the specific addresses. And setup the default parameters for the 2449 * EP. 2450 */ 2451 int i, error; 2452 struct sctp_inpcb *inp; 2453 struct sctp_pcb *m; 2454 struct timeval time; 2455 sctp_sharedkey_t *null_key; 2456 2457 error = 0; 2458 2459 SCTP_INP_INFO_WLOCK(); 2460 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2461 if (inp == NULL) { 2462 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2463 SCTP_INP_INFO_WUNLOCK(); 2464 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2465 return (ENOBUFS); 2466 } 2467 /* zap it */ 2468 bzero(inp, sizeof(*inp)); 2469 2470 /* bump generations */ 2471 /* setup socket pointers */ 2472 inp->sctp_socket = so; 2473 inp->ip_inp.inp.inp_socket = so; 2474 #ifdef INET6 2475 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2476 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2477 } 2478 #endif 2479 inp->sctp_associd_counter = 1; 2480 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2481 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2482 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2483 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2484 /* init the small hash table we use to track asocid <-> tcb */ 2485 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2486 if (inp->sctp_asocidhash == NULL) { 2487 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2488 SCTP_INP_INFO_WUNLOCK(); 2489 return (ENOBUFS); 2490 } 2491 #ifdef IPSEC 2492 { 2493 struct inpcbpolicy *pcb_sp = NULL; 2494 2495 error = ipsec_init_policy(so, &pcb_sp); 2496 /* Arrange to share the policy */ 2497 inp->ip_inp.inp.inp_sp = pcb_sp; 2498 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2499 } 2500 if (error != 0) { 2501 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2502 SCTP_INP_INFO_WUNLOCK(); 2503 return error; 2504 } 2505 #endif /* IPSEC */ 2506 SCTP_INCR_EP_COUNT(); 2507 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2508 SCTP_INP_INFO_WUNLOCK(); 2509 2510 so->so_pcb = (caddr_t)inp; 2511 2512 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2513 /* UDP style socket */ 2514 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2515 SCTP_PCB_FLAGS_UNBOUND); 2516 /* Be sure it is NON-BLOCKING IO for UDP */ 2517 /* SCTP_SET_SO_NBIO(so); */ 2518 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2519 /* TCP style socket */ 2520 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2521 SCTP_PCB_FLAGS_UNBOUND); 2522 /* Be sure we have blocking IO by default */ 2523 SCTP_CLEAR_SO_NBIO(so); 2524 } else { 2525 /* 2526 * unsupported socket type (RAW, etc)- in case we missed it 2527 * in protosw 2528 */ 2529 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2530 so->so_pcb = NULL; 2531 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2532 return (EOPNOTSUPP); 2533 } 2534 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2535 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2536 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2537 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2538 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2539 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2540 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2541 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2542 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2543 } 2544 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2545 &inp->sctp_hashmark); 2546 if (inp->sctp_tcbhash == NULL) { 2547 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2548 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2549 so->so_pcb = NULL; 2550 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2551 return (ENOBUFS); 2552 } 2553 inp->def_vrf_id = vrf_id; 2554 2555 SCTP_INP_INFO_WLOCK(); 2556 SCTP_INP_LOCK_INIT(inp); 2557 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2558 SCTP_INP_READ_INIT(inp); 2559 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2560 /* lock the new ep */ 2561 SCTP_INP_WLOCK(inp); 2562 2563 /* add it to the info area */ 2564 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2565 SCTP_INP_INFO_WUNLOCK(); 2566 2567 TAILQ_INIT(&inp->read_queue); 2568 LIST_INIT(&inp->sctp_addr_list); 2569 2570 LIST_INIT(&inp->sctp_asoc_list); 2571 2572 #ifdef SCTP_TRACK_FREED_ASOCS 2573 /* TEMP CODE */ 2574 LIST_INIT(&inp->sctp_asoc_free_list); 2575 #endif 2576 /* Init the timer structure for signature change */ 2577 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2578 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2579 2580 /* now init the actual endpoint default data */ 2581 m = &inp->sctp_ep; 2582 2583 /* setup the base timeout information */ 2584 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2585 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2586 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2587 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2588 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2589 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2590 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2591 /* all max/min max are in ms */ 2592 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2593 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2594 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2595 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2596 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2597 2598 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2599 2600 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2601 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2602 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2603 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2604 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2605 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2606 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2607 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2608 2609 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2610 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2611 /* number of streams to pre-open on a association */ 2612 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2613 2614 /* Add adaptation cookie */ 2615 m->adaptation_layer_indicator = 0x504C5253; 2616 2617 /* seed random number generator */ 2618 m->random_counter = 1; 2619 m->store_at = SCTP_SIGNATURE_SIZE; 2620 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2621 sctp_fill_random_store(m); 2622 2623 /* Minimum cookie size */ 2624 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2625 sizeof(struct sctp_state_cookie); 2626 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2627 2628 /* Setup the initial secret */ 2629 (void)SCTP_GETTIME_TIMEVAL(&time); 2630 m->time_of_secret_change = time.tv_sec; 2631 2632 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2633 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2634 } 2635 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2636 2637 /* How long is a cookie good for ? */ 2638 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2639 /* 2640 * Initialize authentication parameters 2641 */ 2642 m->local_hmacs = sctp_default_supported_hmaclist(); 2643 m->local_auth_chunks = sctp_alloc_chunklist(); 2644 m->default_dscp = 0; 2645 #ifdef INET6 2646 m->default_flowlabel = 0; 2647 #endif 2648 m->port = 0; /* encapsulation disabled by default */ 2649 sctp_auth_set_default_chunks(m->local_auth_chunks); 2650 LIST_INIT(&m->shared_keys); 2651 /* add default NULL key as key id 0 */ 2652 null_key = sctp_alloc_sharedkey(); 2653 sctp_insert_sharedkey(&m->shared_keys, null_key); 2654 SCTP_INP_WUNLOCK(inp); 2655 #ifdef SCTP_LOG_CLOSING 2656 sctp_log_closing(inp, NULL, 12); 2657 #endif 2658 return (error); 2659 } 2660 2661 2662 void 2663 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2664 struct sctp_tcb *stcb) 2665 { 2666 struct sctp_nets *net; 2667 uint16_t lport, rport; 2668 struct sctppcbhead *head; 2669 struct sctp_laddr *laddr, *oladdr; 2670 2671 atomic_add_int(&stcb->asoc.refcnt, 1); 2672 SCTP_TCB_UNLOCK(stcb); 2673 SCTP_INP_INFO_WLOCK(); 2674 SCTP_INP_WLOCK(old_inp); 2675 SCTP_INP_WLOCK(new_inp); 2676 SCTP_TCB_LOCK(stcb); 2677 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2678 2679 new_inp->sctp_ep.time_of_secret_change = 2680 old_inp->sctp_ep.time_of_secret_change; 2681 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2682 sizeof(old_inp->sctp_ep.secret_key)); 2683 new_inp->sctp_ep.current_secret_number = 2684 old_inp->sctp_ep.current_secret_number; 2685 new_inp->sctp_ep.last_secret_number = 2686 old_inp->sctp_ep.last_secret_number; 2687 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2688 2689 /* make it so new data pours into the new socket */ 2690 stcb->sctp_socket = new_inp->sctp_socket; 2691 stcb->sctp_ep = new_inp; 2692 2693 /* Copy the port across */ 2694 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2695 rport = stcb->rport; 2696 /* Pull the tcb from the old association */ 2697 LIST_REMOVE(stcb, sctp_tcbhash); 2698 LIST_REMOVE(stcb, sctp_tcblist); 2699 if (stcb->asoc.in_asocid_hash) { 2700 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2701 } 2702 /* Now insert the new_inp into the TCP connected hash */ 2703 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2704 2705 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2706 /* Its safe to access */ 2707 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2708 2709 /* Now move the tcb into the endpoint list */ 2710 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2711 /* 2712 * Question, do we even need to worry about the ep-hash since we 2713 * only have one connection? Probably not :> so lets get rid of it 2714 * and not suck up any kernel memory in that. 2715 */ 2716 if (stcb->asoc.in_asocid_hash) { 2717 struct sctpasochead *lhd; 2718 2719 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2720 new_inp->hashasocidmark)]; 2721 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2722 } 2723 /* Ok. Let's restart timer. */ 2724 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2725 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2726 stcb, net); 2727 } 2728 2729 SCTP_INP_INFO_WUNLOCK(); 2730 if (new_inp->sctp_tcbhash != NULL) { 2731 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2732 new_inp->sctp_tcbhash = NULL; 2733 } 2734 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2735 /* Subset bound, so copy in the laddr list from the old_inp */ 2736 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2737 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2738 if (laddr == NULL) { 2739 /* 2740 * Gak, what can we do? This assoc is really 2741 * HOSED. We probably should send an abort 2742 * here. 2743 */ 2744 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2745 continue; 2746 } 2747 SCTP_INCR_LADDR_COUNT(); 2748 bzero(laddr, sizeof(*laddr)); 2749 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2750 laddr->ifa = oladdr->ifa; 2751 atomic_add_int(&laddr->ifa->refcount, 1); 2752 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2753 sctp_nxt_addr); 2754 new_inp->laddr_count++; 2755 if (oladdr == stcb->asoc.last_used_address) { 2756 stcb->asoc.last_used_address = laddr; 2757 } 2758 } 2759 } 2760 /* 2761 * Now any running timers need to be adjusted since we really don't 2762 * care if they are running or not just blast in the new_inp into 2763 * all of them. 2764 */ 2765 2766 stcb->asoc.dack_timer.ep = (void *)new_inp; 2767 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2768 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2769 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2770 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2771 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2772 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2773 /* now what about the nets? */ 2774 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2775 net->pmtu_timer.ep = (void *)new_inp; 2776 net->hb_timer.ep = (void *)new_inp; 2777 net->rxt_timer.ep = (void *)new_inp; 2778 } 2779 SCTP_INP_WUNLOCK(new_inp); 2780 SCTP_INP_WUNLOCK(old_inp); 2781 } 2782 2783 2784 2785 2786 /* sctp_ifap is used to bypass normal local address validation checks */ 2787 int 2788 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2789 struct sctp_ifa *sctp_ifap, struct thread *p) 2790 { 2791 /* bind a ep to a socket address */ 2792 struct sctppcbhead *head; 2793 struct sctp_inpcb *inp, *inp_tmp; 2794 struct inpcb *ip_inp; 2795 int port_reuse_active = 0; 2796 int bindall; 2797 uint16_t lport; 2798 int error; 2799 uint32_t vrf_id; 2800 2801 lport = 0; 2802 error = 0; 2803 bindall = 1; 2804 inp = (struct sctp_inpcb *)so->so_pcb; 2805 ip_inp = (struct inpcb *)so->so_pcb; 2806 #ifdef SCTP_DEBUG 2807 if (addr) { 2808 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2809 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2810 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2811 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2812 } 2813 #endif 2814 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2815 /* already did a bind, subsequent binds NOT allowed ! */ 2816 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2817 return (EINVAL); 2818 } 2819 #ifdef INVARIANTS 2820 if (p == NULL) 2821 panic("null proc/thread"); 2822 #endif 2823 if (addr != NULL) { 2824 switch (addr->sa_family) { 2825 #ifdef INET 2826 case AF_INET: 2827 { 2828 struct sockaddr_in *sin; 2829 2830 /* IPV6_V6ONLY socket? */ 2831 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2832 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2833 return (EINVAL); 2834 } 2835 if (addr->sa_len != sizeof(*sin)) { 2836 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2837 return (EINVAL); 2838 } 2839 sin = (struct sockaddr_in *)addr; 2840 lport = sin->sin_port; 2841 /* 2842 * For LOOPBACK the prison_local_ip4() call 2843 * will transmute the ip address to the 2844 * proper value. 2845 */ 2846 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2847 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2848 return (error); 2849 } 2850 if (sin->sin_addr.s_addr != INADDR_ANY) { 2851 bindall = 0; 2852 } 2853 break; 2854 } 2855 #endif 2856 #ifdef INET6 2857 case AF_INET6: 2858 { 2859 /* 2860 * Only for pure IPv6 Address. (No IPv4 2861 * Mapped!) 2862 */ 2863 struct sockaddr_in6 *sin6; 2864 2865 sin6 = (struct sockaddr_in6 *)addr; 2866 2867 if (addr->sa_len != sizeof(*sin6)) { 2868 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2869 return (EINVAL); 2870 } 2871 lport = sin6->sin6_port; 2872 2873 /* 2874 * For LOOPBACK the prison_local_ip6() call 2875 * will transmute the ipv6 address to the 2876 * proper value. 2877 */ 2878 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2879 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2880 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2881 return (error); 2882 } 2883 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2884 bindall = 0; 2885 /* KAME hack: embed scopeid */ 2886 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2887 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2888 return (EINVAL); 2889 } 2890 } 2891 /* this must be cleared for ifa_ifwithaddr() */ 2892 sin6->sin6_scope_id = 0; 2893 break; 2894 } 2895 #endif 2896 default: 2897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2898 return (EAFNOSUPPORT); 2899 } 2900 } 2901 SCTP_INP_INFO_WLOCK(); 2902 SCTP_INP_WLOCK(inp); 2903 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2904 vrf_id = inp->def_vrf_id; 2905 2906 /* increase our count due to the unlock we do */ 2907 SCTP_INP_INCR_REF(inp); 2908 if (lport) { 2909 /* 2910 * Did the caller specify a port? if so we must see if a ep 2911 * already has this one bound. 2912 */ 2913 /* got to be root to get at low ports */ 2914 if (ntohs(lport) < IPPORT_RESERVED) { 2915 if (p && (error = 2916 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2917 )) { 2918 SCTP_INP_DECR_REF(inp); 2919 SCTP_INP_WUNLOCK(inp); 2920 SCTP_INP_INFO_WUNLOCK(); 2921 return (error); 2922 } 2923 } 2924 if (p == NULL) { 2925 SCTP_INP_DECR_REF(inp); 2926 SCTP_INP_WUNLOCK(inp); 2927 SCTP_INP_INFO_WUNLOCK(); 2928 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2929 return (error); 2930 } 2931 SCTP_INP_WUNLOCK(inp); 2932 if (bindall) { 2933 vrf_id = inp->def_vrf_id; 2934 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2935 if (inp_tmp != NULL) { 2936 /* 2937 * lock guy returned and lower count note 2938 * that we are not bound so inp_tmp should 2939 * NEVER be inp. And it is this inp 2940 * (inp_tmp) that gets the reference bump, 2941 * so we must lower it. 2942 */ 2943 SCTP_INP_DECR_REF(inp_tmp); 2944 /* unlock info */ 2945 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2946 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2947 /* 2948 * Ok, must be one-2-one and 2949 * allowing port re-use 2950 */ 2951 port_reuse_active = 1; 2952 goto continue_anyway; 2953 } 2954 SCTP_INP_DECR_REF(inp); 2955 SCTP_INP_INFO_WUNLOCK(); 2956 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2957 return (EADDRINUSE); 2958 } 2959 } else { 2960 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2961 if (inp_tmp != NULL) { 2962 /* 2963 * lock guy returned and lower count note 2964 * that we are not bound so inp_tmp should 2965 * NEVER be inp. And it is this inp 2966 * (inp_tmp) that gets the reference bump, 2967 * so we must lower it. 2968 */ 2969 SCTP_INP_DECR_REF(inp_tmp); 2970 /* unlock info */ 2971 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2972 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2973 /* 2974 * Ok, must be one-2-one and 2975 * allowing port re-use 2976 */ 2977 port_reuse_active = 1; 2978 goto continue_anyway; 2979 } 2980 SCTP_INP_DECR_REF(inp); 2981 SCTP_INP_INFO_WUNLOCK(); 2982 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2983 return (EADDRINUSE); 2984 } 2985 } 2986 continue_anyway: 2987 SCTP_INP_WLOCK(inp); 2988 if (bindall) { 2989 /* verify that no lport is not used by a singleton */ 2990 if ((port_reuse_active == 0) && 2991 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2992 ) { 2993 /* Sorry someone already has this one bound */ 2994 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2995 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2996 port_reuse_active = 1; 2997 } else { 2998 SCTP_INP_DECR_REF(inp); 2999 SCTP_INP_WUNLOCK(inp); 3000 SCTP_INP_INFO_WUNLOCK(); 3001 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3002 return (EADDRINUSE); 3003 } 3004 } 3005 } 3006 } else { 3007 uint16_t first, last, candidate; 3008 uint16_t count; 3009 int done; 3010 3011 if (ip_inp->inp_flags & INP_HIGHPORT) { 3012 first = MODULE_GLOBAL(ipport_hifirstauto); 3013 last = MODULE_GLOBAL(ipport_hilastauto); 3014 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3015 if (p && (error = 3016 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3017 )) { 3018 SCTP_INP_DECR_REF(inp); 3019 SCTP_INP_WUNLOCK(inp); 3020 SCTP_INP_INFO_WUNLOCK(); 3021 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3022 return (error); 3023 } 3024 first = MODULE_GLOBAL(ipport_lowfirstauto); 3025 last = MODULE_GLOBAL(ipport_lowlastauto); 3026 } else { 3027 first = MODULE_GLOBAL(ipport_firstauto); 3028 last = MODULE_GLOBAL(ipport_lastauto); 3029 } 3030 if (first > last) { 3031 uint16_t temp; 3032 3033 temp = first; 3034 first = last; 3035 last = temp; 3036 } 3037 count = last - first + 1; /* number of candidates */ 3038 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3039 3040 done = 0; 3041 while (!done) { 3042 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3043 done = 1; 3044 } 3045 if (!done) { 3046 if (--count == 0) { 3047 SCTP_INP_DECR_REF(inp); 3048 SCTP_INP_WUNLOCK(inp); 3049 SCTP_INP_INFO_WUNLOCK(); 3050 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3051 return (EADDRINUSE); 3052 } 3053 if (candidate == last) 3054 candidate = first; 3055 else 3056 candidate = candidate + 1; 3057 } 3058 } 3059 lport = htons(candidate); 3060 } 3061 SCTP_INP_DECR_REF(inp); 3062 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3063 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3064 /* 3065 * this really should not happen. The guy did a non-blocking 3066 * bind and then did a close at the same time. 3067 */ 3068 SCTP_INP_WUNLOCK(inp); 3069 SCTP_INP_INFO_WUNLOCK(); 3070 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3071 return (EINVAL); 3072 } 3073 /* ok we look clear to give out this port, so lets setup the binding */ 3074 if (bindall) { 3075 /* binding to all addresses, so just set in the proper flags */ 3076 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3077 /* set the automatic addr changes from kernel flag */ 3078 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3079 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3080 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3081 } else { 3082 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3083 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3084 } 3085 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3086 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3087 } else { 3088 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3089 } 3090 /* 3091 * set the automatic mobility_base from kernel flag (by 3092 * micchie) 3093 */ 3094 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3095 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3096 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3097 } else { 3098 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3099 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3100 } 3101 /* 3102 * set the automatic mobility_fasthandoff from kernel flag 3103 * (by micchie) 3104 */ 3105 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3106 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3107 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3108 } else { 3109 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3110 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3111 } 3112 } else { 3113 /* 3114 * bind specific, make sure flags is off and add a new 3115 * address structure to the sctp_addr_list inside the ep 3116 * structure. 3117 * 3118 * We will need to allocate one and insert it at the head. The 3119 * socketopt call can just insert new addresses in there as 3120 * well. It will also have to do the embed scope kame hack 3121 * too (before adding). 3122 */ 3123 struct sctp_ifa *ifa; 3124 struct sockaddr_storage store_sa; 3125 3126 memset(&store_sa, 0, sizeof(store_sa)); 3127 switch (addr->sa_family) { 3128 case AF_INET: 3129 { 3130 struct sockaddr_in *sin; 3131 3132 sin = (struct sockaddr_in *)&store_sa; 3133 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3134 sin->sin_port = 0; 3135 break; 3136 } 3137 case AF_INET6: 3138 { 3139 struct sockaddr_in6 *sin6; 3140 3141 sin6 = (struct sockaddr_in6 *)&store_sa; 3142 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3143 sin6->sin6_port = 0; 3144 break; 3145 } 3146 default: 3147 break; 3148 } 3149 /* 3150 * first find the interface with the bound address need to 3151 * zero out the port to find the address! yuck! can't do 3152 * this earlier since need port for sctp_pcb_findep() 3153 */ 3154 if (sctp_ifap != NULL) 3155 ifa = sctp_ifap; 3156 else { 3157 /* 3158 * Note for BSD we hit here always other O/S's will 3159 * pass things in via the sctp_ifap argument 3160 * (Panda). 3161 */ 3162 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3163 vrf_id, SCTP_ADDR_NOT_LOCKED); 3164 } 3165 if (ifa == NULL) { 3166 /* Can't find an interface with that address */ 3167 SCTP_INP_WUNLOCK(inp); 3168 SCTP_INP_INFO_WUNLOCK(); 3169 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3170 return (EADDRNOTAVAIL); 3171 } 3172 #ifdef INET6 3173 if (addr->sa_family == AF_INET6) { 3174 /* GAK, more FIXME IFA lock? */ 3175 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3176 /* Can't bind a non-existent addr. */ 3177 SCTP_INP_WUNLOCK(inp); 3178 SCTP_INP_INFO_WUNLOCK(); 3179 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3180 return (EINVAL); 3181 } 3182 } 3183 #endif 3184 /* we're not bound all */ 3185 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3186 /* allow bindx() to send ASCONF's for binding changes */ 3187 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3188 /* clear automatic addr changes from kernel flag */ 3189 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3190 3191 /* add this address to the endpoint list */ 3192 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3193 if (error != 0) { 3194 SCTP_INP_WUNLOCK(inp); 3195 SCTP_INP_INFO_WUNLOCK(); 3196 return (error); 3197 } 3198 inp->laddr_count++; 3199 } 3200 /* find the bucket */ 3201 if (port_reuse_active) { 3202 /* Put it into tcp 1-2-1 hash */ 3203 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3204 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3205 } else { 3206 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3207 } 3208 /* put it in the bucket */ 3209 LIST_INSERT_HEAD(head, inp, sctp_hash); 3210 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3211 head, ntohs(lport), port_reuse_active); 3212 /* set in the port */ 3213 inp->sctp_lport = lport; 3214 3215 /* turn off just the unbound flag */ 3216 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3217 SCTP_INP_WUNLOCK(inp); 3218 SCTP_INP_INFO_WUNLOCK(); 3219 return (0); 3220 } 3221 3222 3223 static void 3224 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3225 { 3226 struct sctp_iterator *it, *nit; 3227 3228 /* 3229 * We enter with the only the ITERATOR_LOCK in place and a write 3230 * lock on the inp_info stuff. 3231 */ 3232 it = sctp_it_ctl.cur_it; 3233 if (it && (it->vn != curvnet)) { 3234 /* Its not looking at our VNET */ 3235 return; 3236 } 3237 if (it && (it->inp == inp)) { 3238 /* 3239 * This is tricky and we hold the iterator lock, but when it 3240 * returns and gets the lock (when we release it) the 3241 * iterator will try to operate on inp. We need to stop that 3242 * from happening. But of course the iterator has a 3243 * reference on the stcb and inp. We can mark it and it will 3244 * stop. 3245 * 3246 * If its a single iterator situation, we set the end iterator 3247 * flag. Otherwise we set the iterator to go to the next 3248 * inp. 3249 * 3250 */ 3251 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3252 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3253 } else { 3254 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3255 } 3256 } 3257 /* 3258 * Now go through and remove any single reference to our inp that 3259 * may be still pending on the list 3260 */ 3261 SCTP_IPI_ITERATOR_WQ_LOCK(); 3262 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3263 if (it->vn != curvnet) { 3264 continue; 3265 } 3266 if (it->inp == inp) { 3267 /* This one points to me is it inp specific? */ 3268 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3269 /* Remove and free this one */ 3270 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3271 it, sctp_nxt_itr); 3272 if (it->function_atend != NULL) { 3273 (*it->function_atend) (it->pointer, it->val); 3274 } 3275 SCTP_FREE(it, SCTP_M_ITER); 3276 } else { 3277 it->inp = LIST_NEXT(it->inp, sctp_list); 3278 if (it->inp) { 3279 SCTP_INP_INCR_REF(it->inp); 3280 } 3281 } 3282 /* 3283 * When its put in the refcnt is incremented so decr 3284 * it 3285 */ 3286 SCTP_INP_DECR_REF(inp); 3287 } 3288 } 3289 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3290 } 3291 3292 /* release sctp_inpcb unbind the port */ 3293 void 3294 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3295 { 3296 /* 3297 * Here we free a endpoint. We must find it (if it is in the Hash 3298 * table) and remove it from there. Then we must also find it in the 3299 * overall list and remove it from there. After all removals are 3300 * complete then any timer has to be stopped. Then start the actual 3301 * freeing. a) Any local lists. b) Any associations. c) The hash of 3302 * all associations. d) finally the ep itself. 3303 */ 3304 struct sctp_tcb *asoc, *nasoc; 3305 struct sctp_laddr *laddr, *nladdr; 3306 struct inpcb *ip_pcb; 3307 struct socket *so; 3308 int being_refed = 0; 3309 struct sctp_queued_to_read *sq, *nsq; 3310 int cnt; 3311 sctp_sharedkey_t *shared_key, *nshared_key; 3312 3313 3314 #ifdef SCTP_LOG_CLOSING 3315 sctp_log_closing(inp, NULL, 0); 3316 #endif 3317 SCTP_ITERATOR_LOCK(); 3318 /* mark any iterators on the list or being processed */ 3319 sctp_iterator_inp_being_freed(inp); 3320 SCTP_ITERATOR_UNLOCK(); 3321 so = inp->sctp_socket; 3322 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3323 /* been here before.. eeks.. get out of here */ 3324 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3325 #ifdef SCTP_LOG_CLOSING 3326 sctp_log_closing(inp, NULL, 1); 3327 #endif 3328 return; 3329 } 3330 SCTP_ASOC_CREATE_LOCK(inp); 3331 SCTP_INP_INFO_WLOCK(); 3332 3333 SCTP_INP_WLOCK(inp); 3334 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3335 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3336 /* socket is gone, so no more wakeups allowed */ 3337 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3338 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3339 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3340 3341 } 3342 /* First time through we have the socket lock, after that no more. */ 3343 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3344 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3345 3346 if (inp->control) { 3347 sctp_m_freem(inp->control); 3348 inp->control = NULL; 3349 } 3350 if (inp->pkt) { 3351 sctp_m_freem(inp->pkt); 3352 inp->pkt = NULL; 3353 } 3354 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3355 * here but I will be nice :> (i.e. 3356 * ip_pcb = ep;) */ 3357 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3358 int cnt_in_sd; 3359 3360 cnt_in_sd = 0; 3361 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3362 SCTP_TCB_LOCK(asoc); 3363 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3364 /* Skip guys being freed */ 3365 cnt_in_sd++; 3366 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3367 /* 3368 * Special case - we did not start a 3369 * kill timer on the asoc due to it 3370 * was not closed. So go ahead and 3371 * start it now. 3372 */ 3373 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3374 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3375 } 3376 SCTP_TCB_UNLOCK(asoc); 3377 continue; 3378 } 3379 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3380 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3381 (asoc->asoc.total_output_queue_size == 0)) { 3382 /* 3383 * If we have data in queue, we don't want 3384 * to just free since the app may have done, 3385 * send()/close or connect/send/close. And 3386 * it wants the data to get across first. 3387 */ 3388 /* Just abandon things in the front states */ 3389 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3390 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3391 cnt_in_sd++; 3392 } 3393 continue; 3394 } 3395 /* Disconnect the socket please */ 3396 asoc->sctp_socket = NULL; 3397 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3398 if ((asoc->asoc.size_on_reasm_queue > 0) || 3399 (asoc->asoc.control_pdapi) || 3400 (asoc->asoc.size_on_all_streams > 0) || 3401 (so && (so->so_rcv.sb_cc > 0))) { 3402 /* Left with Data unread */ 3403 struct mbuf *op_err; 3404 3405 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3406 0, M_DONTWAIT, 1, MT_DATA); 3407 if (op_err) { 3408 /* Fill in the user initiated abort */ 3409 struct sctp_paramhdr *ph; 3410 uint32_t *ippp; 3411 3412 SCTP_BUF_LEN(op_err) = 3413 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3414 ph = mtod(op_err, 3415 struct sctp_paramhdr *); 3416 ph->param_type = htons( 3417 SCTP_CAUSE_USER_INITIATED_ABT); 3418 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3419 ippp = (uint32_t *) (ph + 1); 3420 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3421 } 3422 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3423 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3424 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3425 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3426 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3427 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3428 } 3429 if (sctp_free_assoc(inp, asoc, 3430 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3431 cnt_in_sd++; 3432 } 3433 continue; 3434 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3435 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3436 (asoc->asoc.stream_queue_cnt == 0) 3437 ) { 3438 if (asoc->asoc.locked_on_sending) { 3439 goto abort_anyway; 3440 } 3441 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3442 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3443 struct sctp_nets *netp; 3444 3445 if (asoc->asoc.alternate) { 3446 netp = asoc->asoc.alternate; 3447 } else { 3448 netp = asoc->asoc.primary_destination; 3449 } 3450 /* 3451 * there is nothing queued to send, 3452 * so I send shutdown 3453 */ 3454 sctp_send_shutdown(asoc, netp); 3455 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3456 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3457 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3458 } 3459 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3460 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3461 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3462 netp); 3463 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3464 asoc->asoc.primary_destination); 3465 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3466 } 3467 } else { 3468 /* mark into shutdown pending */ 3469 struct sctp_stream_queue_pending *sp; 3470 3471 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3472 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3473 asoc->asoc.primary_destination); 3474 if (asoc->asoc.locked_on_sending) { 3475 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3476 sctp_streamhead); 3477 if (sp == NULL) { 3478 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3479 asoc->asoc.locked_on_sending, 3480 asoc->asoc.locked_on_sending->stream_no); 3481 } else { 3482 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3483 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3484 } 3485 } 3486 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3487 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3488 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3489 struct mbuf *op_err; 3490 3491 abort_anyway: 3492 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3493 0, M_DONTWAIT, 1, MT_DATA); 3494 if (op_err) { 3495 /* 3496 * Fill in the user 3497 * initiated abort 3498 */ 3499 struct sctp_paramhdr *ph; 3500 uint32_t *ippp; 3501 3502 SCTP_BUF_LEN(op_err) = 3503 (sizeof(struct sctp_paramhdr) + 3504 sizeof(uint32_t)); 3505 ph = mtod(op_err, 3506 struct sctp_paramhdr *); 3507 ph->param_type = htons( 3508 SCTP_CAUSE_USER_INITIATED_ABT); 3509 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3510 ippp = (uint32_t *) (ph + 1); 3511 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3512 } 3513 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3514 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3515 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3516 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3517 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3518 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3519 } 3520 if (sctp_free_assoc(inp, asoc, 3521 SCTP_PCBFREE_NOFORCE, 3522 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3523 cnt_in_sd++; 3524 } 3525 continue; 3526 } else { 3527 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3528 } 3529 } 3530 cnt_in_sd++; 3531 SCTP_TCB_UNLOCK(asoc); 3532 } 3533 /* now is there some left in our SHUTDOWN state? */ 3534 if (cnt_in_sd) { 3535 #ifdef SCTP_LOG_CLOSING 3536 sctp_log_closing(inp, NULL, 2); 3537 #endif 3538 inp->sctp_socket = NULL; 3539 SCTP_INP_WUNLOCK(inp); 3540 SCTP_ASOC_CREATE_UNLOCK(inp); 3541 SCTP_INP_INFO_WUNLOCK(); 3542 return; 3543 } 3544 } 3545 inp->sctp_socket = NULL; 3546 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3547 SCTP_PCB_FLAGS_UNBOUND) { 3548 /* 3549 * ok, this guy has been bound. It's port is somewhere in 3550 * the SCTP_BASE_INFO(hash table). Remove it! 3551 */ 3552 LIST_REMOVE(inp, sctp_hash); 3553 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3554 } 3555 /* 3556 * If there is a timer running to kill us, forget it, since it may 3557 * have a contest on the INP lock.. which would cause us to die ... 3558 */ 3559 cnt = 0; 3560 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3561 SCTP_TCB_LOCK(asoc); 3562 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3563 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3564 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3565 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3566 } 3567 cnt++; 3568 SCTP_TCB_UNLOCK(asoc); 3569 continue; 3570 } 3571 /* Free associations that are NOT killing us */ 3572 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3573 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3574 struct mbuf *op_err; 3575 uint32_t *ippp; 3576 3577 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3578 0, M_DONTWAIT, 1, MT_DATA); 3579 if (op_err) { 3580 /* Fill in the user initiated abort */ 3581 struct sctp_paramhdr *ph; 3582 3583 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3584 sizeof(uint32_t)); 3585 ph = mtod(op_err, struct sctp_paramhdr *); 3586 ph->param_type = htons( 3587 SCTP_CAUSE_USER_INITIATED_ABT); 3588 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3589 ippp = (uint32_t *) (ph + 1); 3590 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3591 3592 } 3593 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3594 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3595 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3596 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3597 cnt++; 3598 SCTP_TCB_UNLOCK(asoc); 3599 continue; 3600 } 3601 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3602 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3603 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3604 } 3605 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3606 cnt++; 3607 } 3608 } 3609 if (cnt) { 3610 /* Ok we have someone out there that will kill us */ 3611 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3612 #ifdef SCTP_LOG_CLOSING 3613 sctp_log_closing(inp, NULL, 3); 3614 #endif 3615 SCTP_INP_WUNLOCK(inp); 3616 SCTP_ASOC_CREATE_UNLOCK(inp); 3617 SCTP_INP_INFO_WUNLOCK(); 3618 return; 3619 } 3620 if (SCTP_INP_LOCK_CONTENDED(inp)) 3621 being_refed++; 3622 if (SCTP_INP_READ_CONTENDED(inp)) 3623 being_refed++; 3624 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3625 being_refed++; 3626 3627 if ((inp->refcount) || 3628 (being_refed) || 3629 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3630 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3631 #ifdef SCTP_LOG_CLOSING 3632 sctp_log_closing(inp, NULL, 4); 3633 #endif 3634 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3635 SCTP_INP_WUNLOCK(inp); 3636 SCTP_ASOC_CREATE_UNLOCK(inp); 3637 SCTP_INP_INFO_WUNLOCK(); 3638 return; 3639 } 3640 inp->sctp_ep.signature_change.type = 0; 3641 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3642 /* 3643 * Remove it from the list .. last thing we need a lock for. 3644 */ 3645 LIST_REMOVE(inp, sctp_list); 3646 SCTP_INP_WUNLOCK(inp); 3647 SCTP_ASOC_CREATE_UNLOCK(inp); 3648 SCTP_INP_INFO_WUNLOCK(); 3649 /* 3650 * Now we release all locks. Since this INP cannot be found anymore 3651 * except possibly by the kill timer that might be running. We call 3652 * the drain function here. It should hit the case were it sees the 3653 * ACTIVE flag cleared and exit out freeing us to proceed and 3654 * destroy everything. 3655 */ 3656 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3657 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3658 } else { 3659 /* Probably un-needed */ 3660 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3661 } 3662 3663 #ifdef SCTP_LOG_CLOSING 3664 sctp_log_closing(inp, NULL, 5); 3665 #endif 3666 3667 3668 if ((inp->sctp_asocidhash) != NULL) { 3669 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3670 inp->sctp_asocidhash = NULL; 3671 } 3672 /* sa_ignore FREED_MEMORY */ 3673 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3674 /* Its only abandoned if it had data left */ 3675 if (sq->length) 3676 SCTP_STAT_INCR(sctps_left_abandon); 3677 3678 TAILQ_REMOVE(&inp->read_queue, sq, next); 3679 sctp_free_remote_addr(sq->whoFrom); 3680 if (so) 3681 so->so_rcv.sb_cc -= sq->length; 3682 if (sq->data) { 3683 sctp_m_freem(sq->data); 3684 sq->data = NULL; 3685 } 3686 /* 3687 * no need to free the net count, since at this point all 3688 * assoc's are gone. 3689 */ 3690 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3691 SCTP_DECR_READQ_COUNT(); 3692 } 3693 /* Now the sctp_pcb things */ 3694 /* 3695 * free each asoc if it is not already closed/free. we can't use the 3696 * macro here since le_next will get freed as part of the 3697 * sctp_free_assoc() call. 3698 */ 3699 if (so) { 3700 #ifdef IPSEC 3701 ipsec_delete_pcbpolicy(ip_pcb); 3702 #endif /* IPSEC */ 3703 3704 /* Unlocks not needed since the socket is gone now */ 3705 } 3706 if (ip_pcb->inp_options) { 3707 (void)sctp_m_free(ip_pcb->inp_options); 3708 ip_pcb->inp_options = 0; 3709 } 3710 #ifdef INET6 3711 if (ip_pcb->inp_vflag & INP_IPV6) { 3712 struct in6pcb *in6p; 3713 3714 in6p = (struct in6pcb *)inp; 3715 ip6_freepcbopts(in6p->in6p_outputopts); 3716 } 3717 #endif /* INET6 */ 3718 ip_pcb->inp_vflag = 0; 3719 /* free up authentication fields */ 3720 if (inp->sctp_ep.local_auth_chunks != NULL) 3721 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3722 if (inp->sctp_ep.local_hmacs != NULL) 3723 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3724 3725 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3726 LIST_REMOVE(shared_key, next); 3727 sctp_free_sharedkey(shared_key); 3728 /* sa_ignore FREED_MEMORY */ 3729 } 3730 3731 /* 3732 * if we have an address list the following will free the list of 3733 * ifaddr's that are set into this ep. Again macro limitations here, 3734 * since the LIST_FOREACH could be a bad idea. 3735 */ 3736 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3737 sctp_remove_laddr(laddr); 3738 } 3739 3740 #ifdef SCTP_TRACK_FREED_ASOCS 3741 /* TEMP CODE */ 3742 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3743 LIST_REMOVE(asoc, sctp_tcblist); 3744 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3745 SCTP_DECR_ASOC_COUNT(); 3746 } 3747 /* *** END TEMP CODE *** */ 3748 #endif 3749 /* Now lets see about freeing the EP hash table. */ 3750 if (inp->sctp_tcbhash != NULL) { 3751 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3752 inp->sctp_tcbhash = NULL; 3753 } 3754 /* Now we must put the ep memory back into the zone pool */ 3755 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3756 SCTP_INP_LOCK_DESTROY(inp); 3757 SCTP_INP_READ_DESTROY(inp); 3758 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3759 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3760 SCTP_DECR_EP_COUNT(); 3761 } 3762 3763 3764 struct sctp_nets * 3765 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3766 { 3767 struct sctp_nets *net; 3768 3769 /* locate the address */ 3770 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3771 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3772 return (net); 3773 } 3774 return (NULL); 3775 } 3776 3777 3778 int 3779 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3780 { 3781 struct sctp_ifa *sctp_ifa; 3782 3783 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3784 if (sctp_ifa) { 3785 return (1); 3786 } else { 3787 return (0); 3788 } 3789 } 3790 3791 /* 3792 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3793 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3794 * stats of stuff. 3795 */ 3796 int 3797 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3798 struct sctp_nets **netp, int set_scope, int from) 3799 { 3800 /* 3801 * The following is redundant to the same lines in the 3802 * sctp_aloc_assoc() but is needed since others call the add address 3803 * function 3804 */ 3805 struct sctp_nets *net, *netfirst; 3806 int addr_inscope; 3807 3808 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3809 from); 3810 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3811 3812 netfirst = sctp_findnet(stcb, newaddr); 3813 if (netfirst) { 3814 /* 3815 * Lie and return ok, we don't want to make the association 3816 * go away for this behavior. It will happen in the TCP 3817 * model in a connected socket. It does not reach the hash 3818 * table until after the association is built so it can't be 3819 * found. Mark as reachable, since the initial creation will 3820 * have been cleared and the NOT_IN_ASSOC flag will have 3821 * been added... and we don't want to end up removing it 3822 * back out. 3823 */ 3824 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3825 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3826 SCTP_ADDR_UNCONFIRMED); 3827 } else { 3828 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3829 } 3830 3831 return (0); 3832 } 3833 addr_inscope = 1; 3834 switch (newaddr->sa_family) { 3835 #ifdef INET 3836 case AF_INET: 3837 { 3838 struct sockaddr_in *sin; 3839 3840 sin = (struct sockaddr_in *)newaddr; 3841 if (sin->sin_addr.s_addr == 0) { 3842 /* Invalid address */ 3843 return (-1); 3844 } 3845 /* zero out the bzero area */ 3846 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3847 3848 /* assure len is set */ 3849 sin->sin_len = sizeof(struct sockaddr_in); 3850 if (set_scope) { 3851 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3852 stcb->ipv4_local_scope = 1; 3853 #else 3854 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3855 stcb->asoc.ipv4_local_scope = 1; 3856 } 3857 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3858 } else { 3859 /* Validate the address is in scope */ 3860 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3861 (stcb->asoc.ipv4_local_scope == 0)) { 3862 addr_inscope = 0; 3863 } 3864 } 3865 break; 3866 } 3867 #endif 3868 #ifdef INET6 3869 case AF_INET6: 3870 { 3871 struct sockaddr_in6 *sin6; 3872 3873 sin6 = (struct sockaddr_in6 *)newaddr; 3874 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3875 /* Invalid address */ 3876 return (-1); 3877 } 3878 /* assure len is set */ 3879 sin6->sin6_len = sizeof(struct sockaddr_in6); 3880 if (set_scope) { 3881 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3882 stcb->asoc.loopback_scope = 1; 3883 stcb->asoc.local_scope = 0; 3884 stcb->asoc.ipv4_local_scope = 1; 3885 stcb->asoc.site_scope = 1; 3886 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3887 /* 3888 * If the new destination is a 3889 * LINK_LOCAL we must have common 3890 * site scope. Don't set the local 3891 * scope since we may not share all 3892 * links, only loopback can do this. 3893 * Links on the local network would 3894 * also be on our private network 3895 * for v4 too. 3896 */ 3897 stcb->asoc.ipv4_local_scope = 1; 3898 stcb->asoc.site_scope = 1; 3899 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3900 /* 3901 * If the new destination is 3902 * SITE_LOCAL then we must have site 3903 * scope in common. 3904 */ 3905 stcb->asoc.site_scope = 1; 3906 } 3907 } else { 3908 /* Validate the address is in scope */ 3909 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3910 (stcb->asoc.loopback_scope == 0)) { 3911 addr_inscope = 0; 3912 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3913 (stcb->asoc.local_scope == 0)) { 3914 addr_inscope = 0; 3915 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3916 (stcb->asoc.site_scope == 0)) { 3917 addr_inscope = 0; 3918 } 3919 } 3920 break; 3921 } 3922 #endif 3923 default: 3924 /* not supported family type */ 3925 return (-1); 3926 } 3927 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3928 if (net == NULL) { 3929 return (-1); 3930 } 3931 SCTP_INCR_RADDR_COUNT(); 3932 bzero(net, sizeof(struct sctp_nets)); 3933 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3934 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3935 switch (newaddr->sa_family) { 3936 #ifdef INET 3937 case AF_INET: 3938 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3939 break; 3940 #endif 3941 #ifdef INET6 3942 case AF_INET6: 3943 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3944 break; 3945 #endif 3946 default: 3947 break; 3948 } 3949 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3950 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3951 stcb->asoc.loopback_scope = 1; 3952 stcb->asoc.ipv4_local_scope = 1; 3953 stcb->asoc.local_scope = 0; 3954 stcb->asoc.site_scope = 1; 3955 addr_inscope = 1; 3956 } 3957 net->failure_threshold = stcb->asoc.def_net_failure; 3958 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3959 if (addr_inscope == 0) { 3960 net->dest_state = (SCTP_ADDR_REACHABLE | 3961 SCTP_ADDR_OUT_OF_SCOPE); 3962 } else { 3963 if (from == SCTP_ADDR_IS_CONFIRMED) 3964 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3965 net->dest_state = SCTP_ADDR_REACHABLE; 3966 else 3967 net->dest_state = SCTP_ADDR_REACHABLE | 3968 SCTP_ADDR_UNCONFIRMED; 3969 } 3970 /* 3971 * We set this to 0, the timer code knows that this means its an 3972 * initial value 3973 */ 3974 net->rto_needed = 1; 3975 net->RTO = 0; 3976 net->RTO_measured = 0; 3977 stcb->asoc.numnets++; 3978 net->ref_count = 1; 3979 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3980 net->port = stcb->asoc.port; 3981 net->dscp = stcb->asoc.default_dscp; 3982 #ifdef INET6 3983 net->flowlabel = stcb->asoc.default_flowlabel; 3984 #endif 3985 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3986 net->dest_state |= SCTP_ADDR_NOHB; 3987 } else { 3988 net->dest_state &= ~SCTP_ADDR_NOHB; 3989 } 3990 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3991 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3992 } else { 3993 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3994 } 3995 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3996 /* Init the timer structure */ 3997 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3998 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3999 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 4000 4001 /* Now generate a route for this guy */ 4002 #ifdef INET6 4003 /* KAME hack: embed scopeid */ 4004 if (newaddr->sa_family == AF_INET6) { 4005 struct sockaddr_in6 *sin6; 4006 4007 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4008 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 4009 sin6->sin6_scope_id = 0; 4010 } 4011 #endif 4012 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 4013 4014 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 4015 /* Get source address */ 4016 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 4017 stcb, 4018 (sctp_route_t *) & net->ro, 4019 net, 4020 0, 4021 stcb->asoc.vrf_id); 4022 /* Now get the interface MTU */ 4023 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 4024 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 4025 } 4026 if (net->mtu > 0) { 4027 uint32_t rmtu; 4028 4029 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 4030 if (rmtu == 0) { 4031 /* 4032 * Start things off to match mtu of 4033 * interface please. 4034 */ 4035 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 4036 net->ro.ro_rt, net->mtu); 4037 } else { 4038 /* 4039 * we take the route mtu over the interface, 4040 * since the route may be leading out the 4041 * loopback, or a different interface. 4042 */ 4043 net->mtu = rmtu; 4044 } 4045 } 4046 } 4047 if (net->mtu == 0) { 4048 switch (newaddr->sa_family) { 4049 #ifdef INET 4050 case AF_INET: 4051 net->mtu = SCTP_DEFAULT_MTU; 4052 break; 4053 #endif 4054 #ifdef INET6 4055 case AF_INET6: 4056 net->mtu = 1280; 4057 break; 4058 #endif 4059 default: 4060 break; 4061 } 4062 } 4063 if (net->port) { 4064 net->mtu -= (uint32_t) sizeof(struct udphdr); 4065 } 4066 if (from == SCTP_ALLOC_ASOC) { 4067 stcb->asoc.smallest_mtu = net->mtu; 4068 } 4069 if (stcb->asoc.smallest_mtu > net->mtu) { 4070 stcb->asoc.smallest_mtu = net->mtu; 4071 } 4072 #ifdef INET6 4073 if (newaddr->sa_family == AF_INET6) { 4074 struct sockaddr_in6 *sin6; 4075 4076 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4077 (void)sa6_recoverscope(sin6); 4078 } 4079 #endif 4080 4081 /* JRS - Use the congestion control given in the CC module */ 4082 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4083 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4084 4085 /* 4086 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4087 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4088 */ 4089 net->find_pseudo_cumack = 1; 4090 net->find_rtx_pseudo_cumack = 1; 4091 net->src_addr_selected = 0; 4092 /* Choose an initial flowid. */ 4093 net->flowid = stcb->asoc.my_vtag ^ 4094 ntohs(stcb->rport) ^ 4095 ntohs(stcb->sctp_ep->sctp_lport); 4096 #ifdef INVARIANTS 4097 net->flowidset = 1; 4098 #endif 4099 if (netp) { 4100 *netp = net; 4101 } 4102 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4103 if (net->ro.ro_rt == NULL) { 4104 /* Since we have no route put it at the back */ 4105 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4106 } else if (netfirst == NULL) { 4107 /* We are the first one in the pool. */ 4108 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4109 } else if (netfirst->ro.ro_rt == NULL) { 4110 /* 4111 * First one has NO route. Place this one ahead of the first 4112 * one. 4113 */ 4114 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4115 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4116 /* 4117 * This one has a different interface than the one at the 4118 * top of the list. Place it ahead. 4119 */ 4120 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4121 } else { 4122 /* 4123 * Ok we have the same interface as the first one. Move 4124 * forward until we find either a) one with a NULL route... 4125 * insert ahead of that b) one with a different ifp.. insert 4126 * after that. c) end of the list.. insert at the tail. 4127 */ 4128 struct sctp_nets *netlook; 4129 4130 do { 4131 netlook = TAILQ_NEXT(netfirst, sctp_next); 4132 if (netlook == NULL) { 4133 /* End of the list */ 4134 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4135 break; 4136 } else if (netlook->ro.ro_rt == NULL) { 4137 /* next one has NO route */ 4138 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4139 break; 4140 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4141 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4142 net, sctp_next); 4143 break; 4144 } 4145 /* Shift forward */ 4146 netfirst = netlook; 4147 } while (netlook != NULL); 4148 } 4149 4150 /* got to have a primary set */ 4151 if (stcb->asoc.primary_destination == 0) { 4152 stcb->asoc.primary_destination = net; 4153 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4154 (net->ro.ro_rt) && 4155 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4156 /* No route to current primary adopt new primary */ 4157 stcb->asoc.primary_destination = net; 4158 } 4159 /* Validate primary is first */ 4160 net = TAILQ_FIRST(&stcb->asoc.nets); 4161 if ((net != stcb->asoc.primary_destination) && 4162 (stcb->asoc.primary_destination)) { 4163 /* 4164 * first one on the list is NOT the primary sctp_cmpaddr() 4165 * is much more efficient if the primary is the first on the 4166 * list, make it so. 4167 */ 4168 TAILQ_REMOVE(&stcb->asoc.nets, 4169 stcb->asoc.primary_destination, sctp_next); 4170 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4171 stcb->asoc.primary_destination, sctp_next); 4172 } 4173 return (0); 4174 } 4175 4176 4177 static uint32_t 4178 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4179 { 4180 uint32_t id; 4181 struct sctpasochead *head; 4182 struct sctp_tcb *lstcb; 4183 4184 SCTP_INP_WLOCK(inp); 4185 try_again: 4186 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4187 /* TSNH */ 4188 SCTP_INP_WUNLOCK(inp); 4189 return (0); 4190 } 4191 /* 4192 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4193 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4194 */ 4195 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4196 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4197 } 4198 id = inp->sctp_associd_counter; 4199 inp->sctp_associd_counter++; 4200 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4201 if (lstcb) { 4202 goto try_again; 4203 } 4204 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4205 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4206 stcb->asoc.in_asocid_hash = 1; 4207 SCTP_INP_WUNLOCK(inp); 4208 return id; 4209 } 4210 4211 /* 4212 * allocate an association and add it to the endpoint. The caller must be 4213 * careful to add all additional addresses once they are know right away or 4214 * else the assoc will be may experience a blackout scenario. 4215 */ 4216 struct sctp_tcb * 4217 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4218 int *error, uint32_t override_tag, uint32_t vrf_id, 4219 struct thread *p 4220 ) 4221 { 4222 /* note the p argument is only valid in unbound sockets */ 4223 4224 struct sctp_tcb *stcb; 4225 struct sctp_association *asoc; 4226 struct sctpasochead *head; 4227 uint16_t rport; 4228 int err; 4229 4230 /* 4231 * Assumption made here: Caller has done a 4232 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4233 * address does not exist already. 4234 */ 4235 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4236 /* Hit max assoc, sorry no more */ 4237 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4238 *error = ENOBUFS; 4239 return (NULL); 4240 } 4241 if (firstaddr == NULL) { 4242 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4243 *error = EINVAL; 4244 return (NULL); 4245 } 4246 SCTP_INP_RLOCK(inp); 4247 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4248 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4249 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4250 /* 4251 * If its in the TCP pool, its NOT allowed to create an 4252 * association. The parent listener needs to call 4253 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4254 * off, or connected one does this.. its an error. 4255 */ 4256 SCTP_INP_RUNLOCK(inp); 4257 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4258 *error = EINVAL; 4259 return (NULL); 4260 } 4261 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4262 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4263 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4264 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4265 SCTP_INP_RUNLOCK(inp); 4266 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4267 *error = EINVAL; 4268 return (NULL); 4269 } 4270 } 4271 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4272 #ifdef SCTP_DEBUG 4273 if (firstaddr) { 4274 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4275 switch (firstaddr->sa_family) { 4276 #ifdef INET 4277 case AF_INET: 4278 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4279 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4280 break; 4281 #endif 4282 #ifdef INET6 4283 case AF_INET6: 4284 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4285 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4286 break; 4287 #endif 4288 default: 4289 break; 4290 } 4291 } else { 4292 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4293 } 4294 #endif /* SCTP_DEBUG */ 4295 switch (firstaddr->sa_family) { 4296 #ifdef INET 4297 case AF_INET: 4298 { 4299 struct sockaddr_in *sin; 4300 4301 sin = (struct sockaddr_in *)firstaddr; 4302 if ((ntohs(sin->sin_port) == 0) || 4303 (sin->sin_addr.s_addr == INADDR_ANY) || 4304 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4305 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4306 /* Invalid address */ 4307 SCTP_INP_RUNLOCK(inp); 4308 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4309 *error = EINVAL; 4310 return (NULL); 4311 } 4312 rport = sin->sin_port; 4313 break; 4314 } 4315 #endif 4316 #ifdef INET6 4317 case AF_INET6: 4318 { 4319 struct sockaddr_in6 *sin6; 4320 4321 sin6 = (struct sockaddr_in6 *)firstaddr; 4322 if ((ntohs(sin6->sin6_port) == 0) || 4323 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4324 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4325 /* Invalid address */ 4326 SCTP_INP_RUNLOCK(inp); 4327 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4328 *error = EINVAL; 4329 return (NULL); 4330 } 4331 rport = sin6->sin6_port; 4332 break; 4333 } 4334 #endif 4335 default: 4336 /* not supported family type */ 4337 SCTP_INP_RUNLOCK(inp); 4338 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4339 *error = EINVAL; 4340 return (NULL); 4341 } 4342 SCTP_INP_RUNLOCK(inp); 4343 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4344 /* 4345 * If you have not performed a bind, then we need to do the 4346 * ephemeral bind for you. 4347 */ 4348 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4349 (struct sockaddr *)NULL, 4350 (struct sctp_ifa *)NULL, 4351 p 4352 ))) { 4353 /* bind error, probably perm */ 4354 *error = err; 4355 return (NULL); 4356 } 4357 } 4358 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4359 if (stcb == NULL) { 4360 /* out of memory? */ 4361 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4362 *error = ENOMEM; 4363 return (NULL); 4364 } 4365 SCTP_INCR_ASOC_COUNT(); 4366 4367 bzero(stcb, sizeof(*stcb)); 4368 asoc = &stcb->asoc; 4369 4370 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4371 SCTP_TCB_LOCK_INIT(stcb); 4372 SCTP_TCB_SEND_LOCK_INIT(stcb); 4373 stcb->rport = rport; 4374 /* setup back pointer's */ 4375 stcb->sctp_ep = inp; 4376 stcb->sctp_socket = inp->sctp_socket; 4377 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4378 /* failed */ 4379 SCTP_TCB_LOCK_DESTROY(stcb); 4380 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4381 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4382 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4383 SCTP_DECR_ASOC_COUNT(); 4384 *error = err; 4385 return (NULL); 4386 } 4387 /* and the port */ 4388 SCTP_INP_INFO_WLOCK(); 4389 SCTP_INP_WLOCK(inp); 4390 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4391 /* inpcb freed while alloc going on */ 4392 SCTP_TCB_LOCK_DESTROY(stcb); 4393 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4394 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4395 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4396 SCTP_INP_WUNLOCK(inp); 4397 SCTP_INP_INFO_WUNLOCK(); 4398 SCTP_DECR_ASOC_COUNT(); 4399 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4400 *error = EINVAL; 4401 return (NULL); 4402 } 4403 SCTP_TCB_LOCK(stcb); 4404 4405 /* now that my_vtag is set, add it to the hash */ 4406 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4407 /* put it in the bucket in the vtag hash of assoc's for the system */ 4408 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4409 SCTP_INP_INFO_WUNLOCK(); 4410 4411 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4412 /* failure.. memory error? */ 4413 if (asoc->strmout) { 4414 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4415 asoc->strmout = NULL; 4416 } 4417 if (asoc->mapping_array) { 4418 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4419 asoc->mapping_array = NULL; 4420 } 4421 if (asoc->nr_mapping_array) { 4422 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4423 asoc->nr_mapping_array = NULL; 4424 } 4425 SCTP_DECR_ASOC_COUNT(); 4426 SCTP_TCB_LOCK_DESTROY(stcb); 4427 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4428 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4429 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4430 SCTP_INP_WUNLOCK(inp); 4431 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4432 *error = ENOBUFS; 4433 return (NULL); 4434 } 4435 /* Init all the timers */ 4436 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4437 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4438 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4439 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4440 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4441 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4442 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4443 4444 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4445 /* now file the port under the hash as well */ 4446 if (inp->sctp_tcbhash != NULL) { 4447 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4448 inp->sctp_hashmark)]; 4449 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4450 } 4451 SCTP_INP_WUNLOCK(inp); 4452 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4453 return (stcb); 4454 } 4455 4456 4457 void 4458 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4459 { 4460 struct sctp_association *asoc; 4461 4462 asoc = &stcb->asoc; 4463 asoc->numnets--; 4464 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4465 if (net == asoc->primary_destination) { 4466 /* Reset primary */ 4467 struct sctp_nets *lnet; 4468 4469 lnet = TAILQ_FIRST(&asoc->nets); 4470 /* 4471 * Mobility adaptation Ideally, if deleted destination is 4472 * the primary, it becomes a fast retransmission trigger by 4473 * the subsequent SET PRIMARY. (by micchie) 4474 */ 4475 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4476 SCTP_MOBILITY_BASE) || 4477 sctp_is_mobility_feature_on(stcb->sctp_ep, 4478 SCTP_MOBILITY_FASTHANDOFF)) { 4479 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4480 if (asoc->deleted_primary != NULL) { 4481 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4482 goto out; 4483 } 4484 asoc->deleted_primary = net; 4485 atomic_add_int(&net->ref_count, 1); 4486 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4487 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4488 sctp_mobility_feature_on(stcb->sctp_ep, 4489 SCTP_MOBILITY_PRIM_DELETED); 4490 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4491 stcb->sctp_ep, stcb, NULL); 4492 } 4493 out: 4494 /* Try to find a confirmed primary */ 4495 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4496 } 4497 if (net == asoc->last_data_chunk_from) { 4498 /* Reset primary */ 4499 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4500 } 4501 if (net == asoc->last_control_chunk_from) { 4502 /* Clear net */ 4503 asoc->last_control_chunk_from = NULL; 4504 } 4505 if (net == stcb->asoc.alternate) { 4506 sctp_free_remote_addr(stcb->asoc.alternate); 4507 stcb->asoc.alternate = NULL; 4508 } 4509 sctp_free_remote_addr(net); 4510 } 4511 4512 /* 4513 * remove a remote endpoint address from an association, it will fail if the 4514 * address does not exist. 4515 */ 4516 int 4517 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4518 { 4519 /* 4520 * Here we need to remove a remote address. This is quite simple, we 4521 * first find it in the list of address for the association 4522 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4523 * on that item. Note we do not allow it to be removed if there are 4524 * no other addresses. 4525 */ 4526 struct sctp_association *asoc; 4527 struct sctp_nets *net, *nnet; 4528 4529 asoc = &stcb->asoc; 4530 4531 /* locate the address */ 4532 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4533 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4534 continue; 4535 } 4536 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4537 remaddr)) { 4538 /* we found the guy */ 4539 if (asoc->numnets < 2) { 4540 /* Must have at LEAST two remote addresses */ 4541 return (-1); 4542 } else { 4543 sctp_remove_net(stcb, net); 4544 return (0); 4545 } 4546 } 4547 } 4548 /* not found. */ 4549 return (-2); 4550 } 4551 4552 void 4553 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4554 { 4555 struct sctpvtaghead *chain; 4556 struct sctp_tagblock *twait_block; 4557 int found = 0; 4558 int i; 4559 4560 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4561 if (!LIST_EMPTY(chain)) { 4562 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4563 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4564 if ((twait_block->vtag_block[i].v_tag == tag) && 4565 (twait_block->vtag_block[i].lport == lport) && 4566 (twait_block->vtag_block[i].rport == rport)) { 4567 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4568 twait_block->vtag_block[i].v_tag = 0; 4569 twait_block->vtag_block[i].lport = 0; 4570 twait_block->vtag_block[i].rport = 0; 4571 found = 1; 4572 break; 4573 } 4574 } 4575 if (found) 4576 break; 4577 } 4578 } 4579 } 4580 4581 int 4582 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4583 { 4584 struct sctpvtaghead *chain; 4585 struct sctp_tagblock *twait_block; 4586 int found = 0; 4587 int i; 4588 4589 SCTP_INP_INFO_WLOCK(); 4590 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4591 if (!LIST_EMPTY(chain)) { 4592 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4593 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4594 if ((twait_block->vtag_block[i].v_tag == tag) && 4595 (twait_block->vtag_block[i].lport == lport) && 4596 (twait_block->vtag_block[i].rport == rport)) { 4597 found = 1; 4598 break; 4599 } 4600 } 4601 if (found) 4602 break; 4603 } 4604 } 4605 SCTP_INP_INFO_WUNLOCK(); 4606 return (found); 4607 } 4608 4609 4610 void 4611 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4612 { 4613 struct sctpvtaghead *chain; 4614 struct sctp_tagblock *twait_block; 4615 struct timeval now; 4616 int set, i; 4617 4618 if (time == 0) { 4619 /* Its disabled */ 4620 return; 4621 } 4622 (void)SCTP_GETTIME_TIMEVAL(&now); 4623 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4624 set = 0; 4625 if (!LIST_EMPTY(chain)) { 4626 /* Block(s) present, lets find space, and expire on the fly */ 4627 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4628 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4629 if ((twait_block->vtag_block[i].v_tag == 0) && 4630 !set) { 4631 twait_block->vtag_block[i].tv_sec_at_expire = 4632 now.tv_sec + time; 4633 twait_block->vtag_block[i].v_tag = tag; 4634 twait_block->vtag_block[i].lport = lport; 4635 twait_block->vtag_block[i].rport = rport; 4636 set = 1; 4637 } else if ((twait_block->vtag_block[i].v_tag) && 4638 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4639 /* Audit expires this guy */ 4640 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4641 twait_block->vtag_block[i].v_tag = 0; 4642 twait_block->vtag_block[i].lport = 0; 4643 twait_block->vtag_block[i].rport = 0; 4644 if (set == 0) { 4645 /* Reuse it for my new tag */ 4646 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4647 twait_block->vtag_block[i].v_tag = tag; 4648 twait_block->vtag_block[i].lport = lport; 4649 twait_block->vtag_block[i].rport = rport; 4650 set = 1; 4651 } 4652 } 4653 } 4654 if (set) { 4655 /* 4656 * We only do up to the block where we can 4657 * place our tag for audits 4658 */ 4659 break; 4660 } 4661 } 4662 } 4663 /* Need to add a new block to chain */ 4664 if (!set) { 4665 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4666 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4667 if (twait_block == NULL) { 4668 #ifdef INVARIANTS 4669 panic("Can not alloc tagblock"); 4670 #endif 4671 return; 4672 } 4673 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4674 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4675 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4676 twait_block->vtag_block[0].v_tag = tag; 4677 twait_block->vtag_block[0].lport = lport; 4678 twait_block->vtag_block[0].rport = rport; 4679 } 4680 } 4681 4682 4683 4684 /*- 4685 * Free the association after un-hashing the remote port. This 4686 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4687 * expect that the input to this function IS a locked TCB. 4688 * It will return 0, if it did NOT destroy the association (instead 4689 * it unlocks it. It will return NON-zero if it either destroyed the 4690 * association OR the association is already destroyed. 4691 */ 4692 int 4693 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4694 { 4695 int i; 4696 struct sctp_association *asoc; 4697 struct sctp_nets *net, *nnet; 4698 struct sctp_laddr *laddr, *naddr; 4699 struct sctp_tmit_chunk *chk, *nchk; 4700 struct sctp_asconf_addr *aparam, *naparam; 4701 struct sctp_asconf_ack *aack, *naack; 4702 struct sctp_stream_reset_list *strrst, *nstrrst; 4703 struct sctp_queued_to_read *sq, *nsq; 4704 struct sctp_stream_queue_pending *sp, *nsp; 4705 sctp_sharedkey_t *shared_key, *nshared_key; 4706 struct socket *so; 4707 4708 /* first, lets purge the entry from the hash table. */ 4709 4710 #ifdef SCTP_LOG_CLOSING 4711 sctp_log_closing(inp, stcb, 6); 4712 #endif 4713 if (stcb->asoc.state == 0) { 4714 #ifdef SCTP_LOG_CLOSING 4715 sctp_log_closing(inp, NULL, 7); 4716 #endif 4717 /* there is no asoc, really TSNH :-0 */ 4718 return (1); 4719 } 4720 if (stcb->asoc.alternate) { 4721 sctp_free_remote_addr(stcb->asoc.alternate); 4722 stcb->asoc.alternate = NULL; 4723 } 4724 /* TEMP CODE */ 4725 if (stcb->freed_from_where == 0) { 4726 /* Only record the first place free happened from */ 4727 stcb->freed_from_where = from_location; 4728 } 4729 /* TEMP CODE */ 4730 4731 asoc = &stcb->asoc; 4732 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4733 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4734 /* nothing around */ 4735 so = NULL; 4736 else 4737 so = inp->sctp_socket; 4738 4739 /* 4740 * We used timer based freeing if a reader or writer is in the way. 4741 * So we first check if we are actually being called from a timer, 4742 * if so we abort early if a reader or writer is still in the way. 4743 */ 4744 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4745 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4746 /* 4747 * is it the timer driving us? if so are the reader/writers 4748 * gone? 4749 */ 4750 if (stcb->asoc.refcnt) { 4751 /* nope, reader or writer in the way */ 4752 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4753 /* no asoc destroyed */ 4754 SCTP_TCB_UNLOCK(stcb); 4755 #ifdef SCTP_LOG_CLOSING 4756 sctp_log_closing(inp, stcb, 8); 4757 #endif 4758 return (0); 4759 } 4760 } 4761 /* now clean up any other timers */ 4762 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4763 asoc->dack_timer.self = NULL; 4764 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4765 /*- 4766 * For stream reset we don't blast this unless 4767 * it is a str-reset timer, it might be the 4768 * free-asoc timer which we DON'T want to 4769 * disturb. 4770 */ 4771 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4772 asoc->strreset_timer.self = NULL; 4773 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4774 asoc->asconf_timer.self = NULL; 4775 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4776 asoc->autoclose_timer.self = NULL; 4777 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4778 asoc->shut_guard_timer.self = NULL; 4779 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4780 asoc->delayed_event_timer.self = NULL; 4781 /* Mobility adaptation */ 4782 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4783 asoc->delete_prim_timer.self = NULL; 4784 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4785 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4786 net->rxt_timer.self = NULL; 4787 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4788 net->pmtu_timer.self = NULL; 4789 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4790 net->hb_timer.self = NULL; 4791 } 4792 /* Now the read queue needs to be cleaned up (only once) */ 4793 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4794 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4795 SCTP_INP_READ_LOCK(inp); 4796 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4797 if (sq->stcb == stcb) { 4798 sq->do_not_ref_stcb = 1; 4799 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4800 /* 4801 * If there is no end, there never will be 4802 * now. 4803 */ 4804 if (sq->end_added == 0) { 4805 /* Held for PD-API clear that. */ 4806 sq->pdapi_aborted = 1; 4807 sq->held_length = 0; 4808 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4809 /* 4810 * Need to add a PD-API 4811 * aborted indication. 4812 * Setting the control_pdapi 4813 * assures that it will be 4814 * added right after this 4815 * msg. 4816 */ 4817 uint32_t strseq; 4818 4819 stcb->asoc.control_pdapi = sq; 4820 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4821 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4822 stcb, 4823 SCTP_PARTIAL_DELIVERY_ABORTED, 4824 (void *)&strseq, 4825 SCTP_SO_LOCKED); 4826 stcb->asoc.control_pdapi = NULL; 4827 } 4828 } 4829 /* Add an end to wake them */ 4830 sq->end_added = 1; 4831 } 4832 } 4833 SCTP_INP_READ_UNLOCK(inp); 4834 if (stcb->block_entry) { 4835 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4836 stcb->block_entry->error = ECONNRESET; 4837 stcb->block_entry = NULL; 4838 } 4839 } 4840 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4841 /* 4842 * Someone holds a reference OR the socket is unaccepted 4843 * yet. 4844 */ 4845 if ((stcb->asoc.refcnt) || 4846 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4847 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4848 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4849 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4850 } 4851 SCTP_TCB_UNLOCK(stcb); 4852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4853 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4854 /* nothing around */ 4855 so = NULL; 4856 if (so) { 4857 /* Wake any reader/writers */ 4858 sctp_sorwakeup(inp, so); 4859 sctp_sowwakeup(inp, so); 4860 } 4861 #ifdef SCTP_LOG_CLOSING 4862 sctp_log_closing(inp, stcb, 9); 4863 #endif 4864 /* no asoc destroyed */ 4865 return (0); 4866 } 4867 #ifdef SCTP_LOG_CLOSING 4868 sctp_log_closing(inp, stcb, 10); 4869 #endif 4870 /* 4871 * When I reach here, no others want to kill the assoc yet.. and I 4872 * own the lock. Now its possible an abort comes in when I do the 4873 * lock exchange below to grab all the locks to do the final take 4874 * out. to prevent this we increment the count, which will start a 4875 * timer and blow out above thus assuring us that we hold exclusive 4876 * killing of the asoc. Note that after getting back the TCB lock we 4877 * will go ahead and increment the counter back up and stop any 4878 * timer a passing stranger may have started :-S 4879 */ 4880 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4881 atomic_add_int(&stcb->asoc.refcnt, 1); 4882 4883 SCTP_TCB_UNLOCK(stcb); 4884 SCTP_INP_INFO_WLOCK(); 4885 SCTP_INP_WLOCK(inp); 4886 SCTP_TCB_LOCK(stcb); 4887 } 4888 /* Double check the GONE flag */ 4889 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4890 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4891 /* nothing around */ 4892 so = NULL; 4893 4894 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4895 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4896 /* 4897 * For TCP type we need special handling when we are 4898 * connected. We also include the peel'ed off ones to. 4899 */ 4900 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4901 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4902 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4903 if (so) { 4904 SOCK_LOCK(so); 4905 if (so->so_rcv.sb_cc == 0) { 4906 so->so_state &= ~(SS_ISCONNECTING | 4907 SS_ISDISCONNECTING | 4908 SS_ISCONFIRMING | 4909 SS_ISCONNECTED); 4910 } 4911 socantrcvmore_locked(so); 4912 sctp_sowwakeup(inp, so); 4913 sctp_sorwakeup(inp, so); 4914 SCTP_SOWAKEUP(so); 4915 } 4916 } 4917 } 4918 /* 4919 * Make it invalid too, that way if its about to run it will abort 4920 * and return. 4921 */ 4922 /* re-increment the lock */ 4923 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4924 atomic_add_int(&stcb->asoc.refcnt, -1); 4925 } 4926 if (stcb->asoc.refcnt) { 4927 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4928 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4929 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4930 SCTP_INP_INFO_WUNLOCK(); 4931 SCTP_INP_WUNLOCK(inp); 4932 } 4933 SCTP_TCB_UNLOCK(stcb); 4934 return (0); 4935 } 4936 asoc->state = 0; 4937 if (inp->sctp_tcbhash) { 4938 LIST_REMOVE(stcb, sctp_tcbhash); 4939 } 4940 if (stcb->asoc.in_asocid_hash) { 4941 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4942 } 4943 /* Now lets remove it from the list of ALL associations in the EP */ 4944 LIST_REMOVE(stcb, sctp_tcblist); 4945 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4946 SCTP_INP_INCR_REF(inp); 4947 SCTP_INP_WUNLOCK(inp); 4948 } 4949 /* pull from vtag hash */ 4950 LIST_REMOVE(stcb, sctp_asocs); 4951 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4952 inp->sctp_lport, stcb->rport); 4953 4954 /* 4955 * Now restop the timers to be sure this is paranoia at is finest! 4956 */ 4957 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4958 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4959 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4960 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4961 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4962 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4963 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4964 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4965 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4966 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4967 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4968 } 4969 4970 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4971 /* 4972 * The chunk lists and such SHOULD be empty but we check them just 4973 * in case. 4974 */ 4975 /* anything on the wheel needs to be removed */ 4976 for (i = 0; i < asoc->streamoutcnt; i++) { 4977 struct sctp_stream_out *outs; 4978 4979 outs = &asoc->strmout[i]; 4980 /* now clean up any chunks here */ 4981 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4982 TAILQ_REMOVE(&outs->outqueue, sp, next); 4983 if (sp->data) { 4984 if (so) { 4985 /* Still an open socket - report */ 4986 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4987 0, (void *)sp, SCTP_SO_LOCKED); 4988 } 4989 if (sp->data) { 4990 sctp_m_freem(sp->data); 4991 sp->data = NULL; 4992 sp->tail_mbuf = NULL; 4993 } 4994 } 4995 if (sp->net) { 4996 sctp_free_remote_addr(sp->net); 4997 sp->net = NULL; 4998 } 4999 sctp_free_spbufspace(stcb, asoc, sp); 5000 if (sp->holds_key_ref) 5001 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED); 5002 /* Free the zone stuff */ 5003 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 5004 SCTP_DECR_STRMOQ_COUNT(); 5005 /* sa_ignore FREED_MEMORY */ 5006 } 5007 } 5008 /* sa_ignore FREED_MEMORY */ 5009 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 5010 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 5011 SCTP_FREE(strrst, SCTP_M_STRESET); 5012 } 5013 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 5014 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 5015 if (sq->data) { 5016 sctp_m_freem(sq->data); 5017 sq->data = NULL; 5018 } 5019 sctp_free_remote_addr(sq->whoFrom); 5020 sq->whoFrom = NULL; 5021 sq->stcb = NULL; 5022 /* Free the ctl entry */ 5023 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 5024 SCTP_DECR_READQ_COUNT(); 5025 /* sa_ignore FREED_MEMORY */ 5026 } 5027 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5028 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5029 if (chk->data) { 5030 sctp_m_freem(chk->data); 5031 chk->data = NULL; 5032 } 5033 if (chk->holds_key_ref) 5034 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5035 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5036 SCTP_DECR_CHK_COUNT(); 5037 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5038 asoc->free_chunk_cnt--; 5039 /* sa_ignore FREED_MEMORY */ 5040 } 5041 /* pending send queue SHOULD be empty */ 5042 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5043 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5044 if (chk->data) { 5045 if (so) { 5046 /* Still a socket? */ 5047 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5048 0, chk, SCTP_SO_LOCKED); 5049 } 5050 if (chk->data) { 5051 sctp_m_freem(chk->data); 5052 chk->data = NULL; 5053 } 5054 } 5055 if (chk->holds_key_ref) 5056 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5057 if (chk->whoTo) { 5058 sctp_free_remote_addr(chk->whoTo); 5059 chk->whoTo = NULL; 5060 } 5061 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5062 SCTP_DECR_CHK_COUNT(); 5063 /* sa_ignore FREED_MEMORY */ 5064 } 5065 /* sent queue SHOULD be empty */ 5066 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5067 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5068 if (chk->data) { 5069 if (so) { 5070 /* Still a socket? */ 5071 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5072 0, chk, SCTP_SO_LOCKED); 5073 } 5074 if (chk->data) { 5075 sctp_m_freem(chk->data); 5076 chk->data = NULL; 5077 } 5078 } 5079 if (chk->holds_key_ref) 5080 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5081 sctp_free_remote_addr(chk->whoTo); 5082 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5083 SCTP_DECR_CHK_COUNT(); 5084 /* sa_ignore FREED_MEMORY */ 5085 } 5086 /* control queue MAY not be empty */ 5087 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5088 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5089 if (chk->data) { 5090 sctp_m_freem(chk->data); 5091 chk->data = NULL; 5092 } 5093 if (chk->holds_key_ref) 5094 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5095 sctp_free_remote_addr(chk->whoTo); 5096 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5097 SCTP_DECR_CHK_COUNT(); 5098 /* sa_ignore FREED_MEMORY */ 5099 } 5100 /* ASCONF queue MAY not be empty */ 5101 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5102 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5103 if (chk->data) { 5104 sctp_m_freem(chk->data); 5105 chk->data = NULL; 5106 } 5107 if (chk->holds_key_ref) 5108 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5109 sctp_free_remote_addr(chk->whoTo); 5110 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5111 SCTP_DECR_CHK_COUNT(); 5112 /* sa_ignore FREED_MEMORY */ 5113 } 5114 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5115 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5116 if (chk->data) { 5117 sctp_m_freem(chk->data); 5118 chk->data = NULL; 5119 } 5120 if (chk->holds_key_ref) 5121 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5122 sctp_free_remote_addr(chk->whoTo); 5123 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5124 SCTP_DECR_CHK_COUNT(); 5125 /* sa_ignore FREED_MEMORY */ 5126 } 5127 5128 if (asoc->mapping_array) { 5129 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5130 asoc->mapping_array = NULL; 5131 } 5132 if (asoc->nr_mapping_array) { 5133 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5134 asoc->nr_mapping_array = NULL; 5135 } 5136 /* the stream outs */ 5137 if (asoc->strmout) { 5138 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5139 asoc->strmout = NULL; 5140 } 5141 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5142 if (asoc->strmin) { 5143 struct sctp_queued_to_read *ctl, *nctl; 5144 5145 for (i = 0; i < asoc->streamincnt; i++) { 5146 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5147 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5148 sctp_free_remote_addr(ctl->whoFrom); 5149 if (ctl->data) { 5150 sctp_m_freem(ctl->data); 5151 ctl->data = NULL; 5152 } 5153 /* 5154 * We don't free the address here since all 5155 * the net's were freed above. 5156 */ 5157 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5158 SCTP_DECR_READQ_COUNT(); 5159 } 5160 } 5161 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5162 asoc->strmin = NULL; 5163 } 5164 asoc->streamincnt = 0; 5165 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5166 #ifdef INVARIANTS 5167 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5168 panic("no net's left alloc'ed, or list points to itself"); 5169 } 5170 #endif 5171 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5172 sctp_free_remote_addr(net); 5173 } 5174 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5175 /* sa_ignore FREED_MEMORY */ 5176 sctp_remove_laddr(laddr); 5177 } 5178 5179 /* pending asconf (address) parameters */ 5180 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5181 /* sa_ignore FREED_MEMORY */ 5182 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5183 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5184 } 5185 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5186 /* sa_ignore FREED_MEMORY */ 5187 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5188 if (aack->data != NULL) { 5189 sctp_m_freem(aack->data); 5190 } 5191 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5192 } 5193 /* clean up auth stuff */ 5194 if (asoc->local_hmacs) 5195 sctp_free_hmaclist(asoc->local_hmacs); 5196 if (asoc->peer_hmacs) 5197 sctp_free_hmaclist(asoc->peer_hmacs); 5198 5199 if (asoc->local_auth_chunks) 5200 sctp_free_chunklist(asoc->local_auth_chunks); 5201 if (asoc->peer_auth_chunks) 5202 sctp_free_chunklist(asoc->peer_auth_chunks); 5203 5204 sctp_free_authinfo(&asoc->authinfo); 5205 5206 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5207 LIST_REMOVE(shared_key, next); 5208 sctp_free_sharedkey(shared_key); 5209 /* sa_ignore FREED_MEMORY */ 5210 } 5211 5212 /* Insert new items here :> */ 5213 5214 /* Get rid of LOCK */ 5215 SCTP_TCB_LOCK_DESTROY(stcb); 5216 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5217 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5218 SCTP_INP_INFO_WUNLOCK(); 5219 SCTP_INP_RLOCK(inp); 5220 } 5221 #ifdef SCTP_TRACK_FREED_ASOCS 5222 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5223 /* now clean up the tasoc itself */ 5224 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5225 SCTP_DECR_ASOC_COUNT(); 5226 } else { 5227 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5228 } 5229 #else 5230 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5231 SCTP_DECR_ASOC_COUNT(); 5232 #endif 5233 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5234 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5235 /* 5236 * If its NOT the inp_free calling us AND sctp_close 5237 * as been called, we call back... 5238 */ 5239 SCTP_INP_RUNLOCK(inp); 5240 /* 5241 * This will start the kill timer (if we are the 5242 * last one) since we hold an increment yet. But 5243 * this is the only safe way to do this since 5244 * otherwise if the socket closes at the same time 5245 * we are here we might collide in the cleanup. 5246 */ 5247 sctp_inpcb_free(inp, 5248 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5249 SCTP_CALLED_DIRECTLY_NOCMPSET); 5250 SCTP_INP_DECR_REF(inp); 5251 goto out_of; 5252 } else { 5253 /* The socket is still open. */ 5254 SCTP_INP_DECR_REF(inp); 5255 } 5256 } 5257 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5258 SCTP_INP_RUNLOCK(inp); 5259 } 5260 out_of: 5261 /* destroyed the asoc */ 5262 #ifdef SCTP_LOG_CLOSING 5263 sctp_log_closing(inp, NULL, 11); 5264 #endif 5265 return (1); 5266 } 5267 5268 5269 5270 /* 5271 * determine if a destination is "reachable" based upon the addresses bound 5272 * to the current endpoint (e.g. only v4 or v6 currently bound) 5273 */ 5274 /* 5275 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5276 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5277 * types bound as its endpoint 5278 */ 5279 int 5280 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5281 { 5282 struct sctp_inpcb *inp; 5283 int answer; 5284 5285 /* 5286 * No locks here, the TCB, in all cases is already locked and an 5287 * assoc is up. There is either a INP lock by the caller applied (in 5288 * asconf case when deleting an address) or NOT in the HB case, 5289 * however if HB then the INP increment is up and the INP will not 5290 * be removed (on top of the fact that we have a TCB lock). So we 5291 * only want to read the sctp_flags, which is either bound-all or 5292 * not.. no protection needed since once an assoc is up you can't be 5293 * changing your binding. 5294 */ 5295 inp = stcb->sctp_ep; 5296 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5297 /* if bound all, destination is not restricted */ 5298 /* 5299 * RRS: Question during lock work: Is this correct? If you 5300 * are bound-all you still might need to obey the V4--V6 5301 * flags??? IMO this bound-all stuff needs to be removed! 5302 */ 5303 return (1); 5304 } 5305 /* NOTE: all "scope" checks are done when local addresses are added */ 5306 switch (destaddr->sa_family) { 5307 case AF_INET6: 5308 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5309 break; 5310 case AF_INET: 5311 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5312 break; 5313 default: 5314 /* invalid family, so it's unreachable */ 5315 answer = 0; 5316 break; 5317 } 5318 return (answer); 5319 } 5320 5321 /* 5322 * update the inp_vflags on an endpoint 5323 */ 5324 static void 5325 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5326 { 5327 struct sctp_laddr *laddr; 5328 5329 /* first clear the flag */ 5330 inp->ip_inp.inp.inp_vflag = 0; 5331 /* set the flag based on addresses on the ep list */ 5332 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5333 if (laddr->ifa == NULL) { 5334 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5335 __FUNCTION__); 5336 continue; 5337 } 5338 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5339 continue; 5340 } 5341 switch (laddr->ifa->address.sa.sa_family) { 5342 #ifdef INET6 5343 case AF_INET6: 5344 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5345 break; 5346 #endif 5347 #ifdef INET 5348 case AF_INET: 5349 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5350 break; 5351 #endif 5352 default: 5353 break; 5354 } 5355 } 5356 } 5357 5358 /* 5359 * Add the address to the endpoint local address list There is nothing to be 5360 * done if we are bound to all addresses 5361 */ 5362 void 5363 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5364 { 5365 struct sctp_laddr *laddr; 5366 int fnd, error = 0; 5367 5368 fnd = 0; 5369 5370 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5371 /* You are already bound to all. You have it already */ 5372 return; 5373 } 5374 #ifdef INET6 5375 if (ifa->address.sa.sa_family == AF_INET6) { 5376 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5377 /* Can't bind a non-useable addr. */ 5378 return; 5379 } 5380 } 5381 #endif 5382 /* first, is it already present? */ 5383 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5384 if (laddr->ifa == ifa) { 5385 fnd = 1; 5386 break; 5387 } 5388 } 5389 5390 if (fnd == 0) { 5391 /* Not in the ep list */ 5392 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5393 if (error != 0) 5394 return; 5395 inp->laddr_count++; 5396 /* update inp_vflag flags */ 5397 switch (ifa->address.sa.sa_family) { 5398 #ifdef INET6 5399 case AF_INET6: 5400 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5401 break; 5402 #endif 5403 #ifdef INET6 5404 case AF_INET: 5405 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5406 break; 5407 #endif 5408 default: 5409 break; 5410 } 5411 } 5412 return; 5413 } 5414 5415 5416 /* 5417 * select a new (hopefully reachable) destination net (should only be used 5418 * when we deleted an ep addr that is the only usable source address to reach 5419 * the destination net) 5420 */ 5421 static void 5422 sctp_select_primary_destination(struct sctp_tcb *stcb) 5423 { 5424 struct sctp_nets *net; 5425 5426 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5427 /* for now, we'll just pick the first reachable one we find */ 5428 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5429 continue; 5430 if (sctp_destination_is_reachable(stcb, 5431 (struct sockaddr *)&net->ro._l_addr)) { 5432 /* found a reachable destination */ 5433 stcb->asoc.primary_destination = net; 5434 } 5435 } 5436 /* I can't there from here! ...we're gonna die shortly... */ 5437 } 5438 5439 5440 /* 5441 * Delete the address from the endpoint local address list There is nothing 5442 * to be done if we are bound to all addresses 5443 */ 5444 void 5445 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5446 { 5447 struct sctp_laddr *laddr; 5448 int fnd; 5449 5450 fnd = 0; 5451 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5452 /* You are already bound to all. You have it already */ 5453 return; 5454 } 5455 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5456 if (laddr->ifa == ifa) { 5457 fnd = 1; 5458 break; 5459 } 5460 } 5461 if (fnd && (inp->laddr_count < 2)) { 5462 /* can't delete unless there are at LEAST 2 addresses */ 5463 return; 5464 } 5465 if (fnd) { 5466 /* 5467 * clean up any use of this address go through our 5468 * associations and clear any last_used_address that match 5469 * this one for each assoc, see if a new primary_destination 5470 * is needed 5471 */ 5472 struct sctp_tcb *stcb; 5473 5474 /* clean up "next_addr_touse" */ 5475 if (inp->next_addr_touse == laddr) 5476 /* delete this address */ 5477 inp->next_addr_touse = NULL; 5478 5479 /* clean up "last_used_address" */ 5480 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5481 struct sctp_nets *net; 5482 5483 SCTP_TCB_LOCK(stcb); 5484 if (stcb->asoc.last_used_address == laddr) 5485 /* delete this address */ 5486 stcb->asoc.last_used_address = NULL; 5487 /* 5488 * Now spin through all the nets and purge any ref 5489 * to laddr 5490 */ 5491 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5492 if (net->ro._s_addr && 5493 (net->ro._s_addr->ifa == laddr->ifa)) { 5494 /* Yep, purge src address selected */ 5495 sctp_rtentry_t *rt; 5496 5497 /* delete this address if cached */ 5498 rt = net->ro.ro_rt; 5499 if (rt != NULL) { 5500 RTFREE(rt); 5501 net->ro.ro_rt = NULL; 5502 } 5503 sctp_free_ifa(net->ro._s_addr); 5504 net->ro._s_addr = NULL; 5505 net->src_addr_selected = 0; 5506 } 5507 } 5508 SCTP_TCB_UNLOCK(stcb); 5509 } /* for each tcb */ 5510 /* remove it from the ep list */ 5511 sctp_remove_laddr(laddr); 5512 inp->laddr_count--; 5513 /* update inp_vflag flags */ 5514 sctp_update_ep_vflag(inp); 5515 } 5516 return; 5517 } 5518 5519 /* 5520 * Add the address to the TCB local address restricted list. 5521 * This is a "pending" address list (eg. addresses waiting for an 5522 * ASCONF-ACK response) and cannot be used as a valid source address. 5523 */ 5524 void 5525 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5526 { 5527 struct sctp_laddr *laddr; 5528 struct sctpladdr *list; 5529 5530 /* 5531 * Assumes TCB is locked.. and possibly the INP. May need to 5532 * confirm/fix that if we need it and is not the case. 5533 */ 5534 list = &stcb->asoc.sctp_restricted_addrs; 5535 5536 #ifdef INET6 5537 if (ifa->address.sa.sa_family == AF_INET6) { 5538 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5539 /* Can't bind a non-existent addr. */ 5540 return; 5541 } 5542 } 5543 #endif 5544 /* does the address already exist? */ 5545 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5546 if (laddr->ifa == ifa) { 5547 return; 5548 } 5549 } 5550 5551 /* add to the list */ 5552 (void)sctp_insert_laddr(list, ifa, 0); 5553 return; 5554 } 5555 5556 /* 5557 * insert an laddr entry with the given ifa for the desired list 5558 */ 5559 int 5560 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5561 { 5562 struct sctp_laddr *laddr; 5563 5564 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5565 if (laddr == NULL) { 5566 /* out of memory? */ 5567 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5568 return (EINVAL); 5569 } 5570 SCTP_INCR_LADDR_COUNT(); 5571 bzero(laddr, sizeof(*laddr)); 5572 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5573 laddr->ifa = ifa; 5574 laddr->action = act; 5575 atomic_add_int(&ifa->refcount, 1); 5576 /* insert it */ 5577 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5578 5579 return (0); 5580 } 5581 5582 /* 5583 * Remove an laddr entry from the local address list (on an assoc) 5584 */ 5585 void 5586 sctp_remove_laddr(struct sctp_laddr *laddr) 5587 { 5588 5589 /* remove from the list */ 5590 LIST_REMOVE(laddr, sctp_nxt_addr); 5591 sctp_free_ifa(laddr->ifa); 5592 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5593 SCTP_DECR_LADDR_COUNT(); 5594 } 5595 5596 /* 5597 * Remove a local address from the TCB local address restricted list 5598 */ 5599 void 5600 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5601 { 5602 struct sctp_inpcb *inp; 5603 struct sctp_laddr *laddr; 5604 5605 /* 5606 * This is called by asconf work. It is assumed that a) The TCB is 5607 * locked and b) The INP is locked. This is true in as much as I can 5608 * trace through the entry asconf code where I did these locks. 5609 * Again, the ASCONF code is a bit different in that it does lock 5610 * the INP during its work often times. This must be since we don't 5611 * want other proc's looking up things while what they are looking 5612 * up is changing :-D 5613 */ 5614 5615 inp = stcb->sctp_ep; 5616 /* if subset bound and don't allow ASCONF's, can't delete last */ 5617 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5618 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5619 if (stcb->sctp_ep->laddr_count < 2) { 5620 /* can't delete last address */ 5621 return; 5622 } 5623 } 5624 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5625 /* remove the address if it exists */ 5626 if (laddr->ifa == NULL) 5627 continue; 5628 if (laddr->ifa == ifa) { 5629 sctp_remove_laddr(laddr); 5630 return; 5631 } 5632 } 5633 5634 /* address not found! */ 5635 return; 5636 } 5637 5638 /* 5639 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5640 */ 5641 /* sysctl */ 5642 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5643 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5644 5645 5646 5647 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5648 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5649 int *sctp_cpuarry = NULL; 5650 void 5651 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5652 { 5653 /* Queue a packet to a processor for the specified core */ 5654 struct sctp_mcore_queue *qent; 5655 struct sctp_mcore_ctrl *wkq; 5656 int need_wake = 0; 5657 5658 if (sctp_mcore_workers == NULL) { 5659 /* Something went way bad during setup */ 5660 sctp_input_with_port(m, off, 0); 5661 return; 5662 } 5663 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5664 (sizeof(struct sctp_mcore_queue)), 5665 SCTP_M_MCORE); 5666 if (qent == NULL) { 5667 /* This is trouble */ 5668 sctp_input_with_port(m, off, 0); 5669 return; 5670 } 5671 qent->vn = curvnet; 5672 qent->m = m; 5673 qent->off = off; 5674 qent->v6 = 0; 5675 wkq = &sctp_mcore_workers[cpu_to_use]; 5676 SCTP_MCORE_QLOCK(wkq); 5677 5678 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5679 if (wkq->running == 0) { 5680 need_wake = 1; 5681 } 5682 SCTP_MCORE_QUNLOCK(wkq); 5683 if (need_wake) { 5684 wakeup(&wkq->running); 5685 } 5686 } 5687 5688 static void 5689 sctp_mcore_thread(void *arg) 5690 { 5691 5692 struct sctp_mcore_ctrl *wkq; 5693 struct sctp_mcore_queue *qent; 5694 5695 wkq = (struct sctp_mcore_ctrl *)arg; 5696 struct mbuf *m; 5697 int off, v6; 5698 5699 /* Wait for first tickle */ 5700 SCTP_MCORE_LOCK(wkq); 5701 wkq->running = 0; 5702 msleep(&wkq->running, 5703 &wkq->core_mtx, 5704 0, "wait for pkt", 0); 5705 SCTP_MCORE_UNLOCK(wkq); 5706 5707 /* Bind to our cpu */ 5708 thread_lock(curthread); 5709 sched_bind(curthread, wkq->cpuid); 5710 thread_unlock(curthread); 5711 5712 /* Now lets start working */ 5713 SCTP_MCORE_LOCK(wkq); 5714 /* Now grab lock and go */ 5715 for (;;) { 5716 SCTP_MCORE_QLOCK(wkq); 5717 skip_sleep: 5718 wkq->running = 1; 5719 qent = TAILQ_FIRST(&wkq->que); 5720 if (qent) { 5721 TAILQ_REMOVE(&wkq->que, qent, next); 5722 SCTP_MCORE_QUNLOCK(wkq); 5723 CURVNET_SET(qent->vn); 5724 m = qent->m; 5725 off = qent->off; 5726 v6 = qent->v6; 5727 SCTP_FREE(qent, SCTP_M_MCORE); 5728 if (v6 == 0) { 5729 sctp_input_with_port(m, off, 0); 5730 } else { 5731 SCTP_PRINTF("V6 not yet supported\n"); 5732 sctp_m_freem(m); 5733 } 5734 CURVNET_RESTORE(); 5735 SCTP_MCORE_QLOCK(wkq); 5736 } 5737 wkq->running = 0; 5738 if (!TAILQ_EMPTY(&wkq->que)) { 5739 goto skip_sleep; 5740 } 5741 SCTP_MCORE_QUNLOCK(wkq); 5742 msleep(&wkq->running, 5743 &wkq->core_mtx, 5744 0, "wait for pkt", 0); 5745 } 5746 } 5747 5748 static void 5749 sctp_startup_mcore_threads(void) 5750 { 5751 int i, cpu; 5752 5753 if (mp_ncpus == 1) 5754 return; 5755 5756 if (sctp_mcore_workers != NULL) { 5757 /* 5758 * Already been here in some previous vnet? 5759 */ 5760 return; 5761 } 5762 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5763 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5764 SCTP_M_MCORE); 5765 if (sctp_mcore_workers == NULL) { 5766 /* TSNH I hope */ 5767 return; 5768 } 5769 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5770 sizeof(struct sctp_mcore_ctrl))); 5771 /* Init the structures */ 5772 for (i = 0; i <= mp_maxid; i++) { 5773 TAILQ_INIT(&sctp_mcore_workers[i].que); 5774 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5775 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5776 sctp_mcore_workers[i].cpuid = i; 5777 } 5778 if (sctp_cpuarry == NULL) { 5779 SCTP_MALLOC(sctp_cpuarry, int *, 5780 (mp_ncpus * sizeof(int)), 5781 SCTP_M_MCORE); 5782 i = 0; 5783 CPU_FOREACH(cpu) { 5784 sctp_cpuarry[i] = cpu; 5785 i++; 5786 } 5787 } 5788 /* Now start them all */ 5789 CPU_FOREACH(cpu) { 5790 (void)kproc_create(sctp_mcore_thread, 5791 (void *)&sctp_mcore_workers[cpu], 5792 &sctp_mcore_workers[cpu].thread_proc, 5793 RFPROC, 5794 SCTP_KTHREAD_PAGES, 5795 SCTP_MCORE_NAME); 5796 5797 } 5798 } 5799 5800 #endif 5801 5802 void 5803 sctp_pcb_init() 5804 { 5805 /* 5806 * SCTP initialization for the PCB structures should be called by 5807 * the sctp_init() funciton. 5808 */ 5809 int i; 5810 struct timeval tv; 5811 5812 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5813 /* error I was called twice */ 5814 return; 5815 } 5816 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5817 5818 #if defined(SCTP_LOCAL_TRACE_BUF) 5819 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5820 #endif 5821 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5822 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5823 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5824 SCTP_M_MCORE); 5825 #endif 5826 (void)SCTP_GETTIME_TIMEVAL(&tv); 5827 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5828 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5829 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5830 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5831 #else 5832 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5833 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5834 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5835 #endif 5836 /* init the empty list of (All) Endpoints */ 5837 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5838 5839 5840 /* init the hash table of endpoints */ 5841 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5842 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5843 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5844 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5845 &SCTP_BASE_INFO(hashasocmark)); 5846 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5847 &SCTP_BASE_INFO(hashmark)); 5848 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5849 &SCTP_BASE_INFO(hashtcpmark)); 5850 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5851 5852 5853 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5854 &SCTP_BASE_INFO(hashvrfmark)); 5855 5856 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5857 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5858 /* init the zones */ 5859 /* 5860 * FIX ME: Should check for NULL returns, but if it does fail we are 5861 * doomed to panic anyways... add later maybe. 5862 */ 5863 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5864 sizeof(struct sctp_inpcb), maxsockets); 5865 5866 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5867 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5868 5869 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5870 sizeof(struct sctp_laddr), 5871 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5872 5873 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5874 sizeof(struct sctp_nets), 5875 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5876 5877 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5878 sizeof(struct sctp_tmit_chunk), 5879 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5880 5881 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5882 sizeof(struct sctp_queued_to_read), 5883 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5884 5885 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5886 sizeof(struct sctp_stream_queue_pending), 5887 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5888 5889 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5890 sizeof(struct sctp_asconf), 5891 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5892 5893 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5894 sizeof(struct sctp_asconf_ack), 5895 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5896 5897 5898 /* Master Lock INIT for info structure */ 5899 SCTP_INP_INFO_LOCK_INIT(); 5900 SCTP_STATLOG_INIT_LOCK(); 5901 5902 SCTP_IPI_COUNT_INIT(); 5903 SCTP_IPI_ADDR_INIT(); 5904 #ifdef SCTP_PACKET_LOGGING 5905 SCTP_IP_PKTLOG_INIT(); 5906 #endif 5907 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5908 5909 SCTP_WQ_ADDR_INIT(); 5910 /* not sure if we need all the counts */ 5911 SCTP_BASE_INFO(ipi_count_ep) = 0; 5912 /* assoc/tcb zone info */ 5913 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5914 /* local addrlist zone info */ 5915 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5916 /* remote addrlist zone info */ 5917 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5918 /* chunk info */ 5919 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5920 5921 /* socket queue zone info */ 5922 SCTP_BASE_INFO(ipi_count_readq) = 0; 5923 5924 /* stream out queue cont */ 5925 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5926 5927 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5928 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5929 5930 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5931 5932 /* Init the TIMEWAIT list */ 5933 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5934 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5935 } 5936 5937 sctp_startup_iterator(); 5938 5939 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5940 sctp_startup_mcore_threads(); 5941 #endif 5942 5943 /* 5944 * INIT the default VRF which for BSD is the only one, other O/S's 5945 * may have more. But initially they must start with one and then 5946 * add the VRF's as addresses are added. 5947 */ 5948 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5949 } 5950 5951 /* 5952 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5953 */ 5954 void 5955 sctp_pcb_finish(void) 5956 { 5957 struct sctp_vrflist *vrf_bucket; 5958 struct sctp_vrf *vrf, *nvrf; 5959 struct sctp_ifn *ifn, *nifn; 5960 struct sctp_ifa *ifa, *nifa; 5961 struct sctpvtaghead *chain; 5962 struct sctp_tagblock *twait_block, *prev_twait_block; 5963 struct sctp_laddr *wi, *nwi; 5964 int i; 5965 5966 /* 5967 * Free BSD the it thread never exits but we do clean up. The only 5968 * way freebsd reaches here if we have VRF's but we still add the 5969 * ifdef to make it compile on old versions. 5970 */ 5971 { 5972 struct sctp_iterator *it, *nit; 5973 5974 SCTP_IPI_ITERATOR_WQ_LOCK(); 5975 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5976 if (it->vn != curvnet) { 5977 continue; 5978 } 5979 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5980 if (it->function_atend != NULL) { 5981 (*it->function_atend) (it->pointer, it->val); 5982 } 5983 SCTP_FREE(it, SCTP_M_ITER); 5984 } 5985 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5986 SCTP_ITERATOR_LOCK(); 5987 if ((sctp_it_ctl.cur_it) && 5988 (sctp_it_ctl.cur_it->vn == curvnet)) { 5989 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5990 } 5991 SCTP_ITERATOR_UNLOCK(); 5992 } 5993 5994 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5995 SCTP_WQ_ADDR_LOCK(); 5996 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5997 LIST_REMOVE(wi, sctp_nxt_addr); 5998 SCTP_DECR_LADDR_COUNT(); 5999 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 6000 } 6001 SCTP_WQ_ADDR_UNLOCK(); 6002 6003 /* 6004 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 6005 * destroyed first). 6006 */ 6007 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 6008 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 6009 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 6010 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 6011 /* free the ifa */ 6012 LIST_REMOVE(ifa, next_bucket); 6013 LIST_REMOVE(ifa, next_ifa); 6014 SCTP_FREE(ifa, SCTP_M_IFA); 6015 } 6016 /* free the ifn */ 6017 LIST_REMOVE(ifn, next_bucket); 6018 LIST_REMOVE(ifn, next_ifn); 6019 SCTP_FREE(ifn, SCTP_M_IFN); 6020 } 6021 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 6022 /* free the vrf */ 6023 LIST_REMOVE(vrf, next_vrf); 6024 SCTP_FREE(vrf, SCTP_M_VRF); 6025 } 6026 /* free the vrf hashes */ 6027 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6028 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6029 6030 /* 6031 * free the TIMEWAIT list elements malloc'd in the function 6032 * sctp_add_vtag_to_timewait()... 6033 */ 6034 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6035 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6036 if (!LIST_EMPTY(chain)) { 6037 prev_twait_block = NULL; 6038 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6039 if (prev_twait_block) { 6040 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6041 } 6042 prev_twait_block = twait_block; 6043 } 6044 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6045 } 6046 } 6047 6048 /* free the locks and mutexes */ 6049 #ifdef SCTP_PACKET_LOGGING 6050 SCTP_IP_PKTLOG_DESTROY(); 6051 #endif 6052 SCTP_IPI_ADDR_DESTROY(); 6053 SCTP_STATLOG_DESTROY(); 6054 SCTP_INP_INFO_LOCK_DESTROY(); 6055 6056 SCTP_WQ_ADDR_DESTROY(); 6057 6058 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6059 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6060 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6061 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6062 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6063 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6064 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6065 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6066 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6067 /* Get rid of other stuff to */ 6068 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6069 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6070 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6071 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6072 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6073 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6074 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6075 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6076 #endif 6077 } 6078 6079 6080 int 6081 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6082 int offset, int limit, struct sctphdr *sh, 6083 struct sockaddr *altsa) 6084 { 6085 /* 6086 * grub through the INIT pulling addresses and loading them to the 6087 * nets structure in the asoc. The from address in the mbuf should 6088 * also be loaded (if it is not already). This routine can be called 6089 * with either INIT or INIT-ACK's as long as the m points to the IP 6090 * packet and the offset points to the beginning of the parameters. 6091 */ 6092 struct sctp_inpcb *inp; 6093 struct sctp_nets *net, *nnet, *net_tmp; 6094 struct ip *iph; 6095 struct sctp_paramhdr *phdr, parm_buf; 6096 struct sctp_tcb *stcb_tmp; 6097 uint16_t ptype, plen; 6098 struct sockaddr *sa; 6099 struct sockaddr_storage dest_store; 6100 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 6101 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6102 struct sctp_auth_random *p_random = NULL; 6103 uint16_t random_len = 0; 6104 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6105 struct sctp_auth_hmac_algo *hmacs = NULL; 6106 uint16_t hmacs_len = 0; 6107 uint8_t saw_asconf = 0; 6108 uint8_t saw_asconf_ack = 0; 6109 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6110 struct sctp_auth_chunk_list *chunks = NULL; 6111 uint16_t num_chunks = 0; 6112 sctp_key_t *new_key; 6113 uint32_t keylen; 6114 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6115 uint8_t ecn_allowed; 6116 6117 #ifdef INET 6118 struct sockaddr_in sin; 6119 6120 #endif 6121 #ifdef INET6 6122 struct sockaddr_in6 sin6; 6123 6124 #endif 6125 6126 /* First get the destination address setup too. */ 6127 #ifdef INET 6128 memset(&sin, 0, sizeof(sin)); 6129 sin.sin_family = AF_INET; 6130 sin.sin_len = sizeof(sin); 6131 sin.sin_port = stcb->rport; 6132 #endif 6133 #ifdef INET6 6134 memset(&sin6, 0, sizeof(sin6)); 6135 sin6.sin6_family = AF_INET6; 6136 sin6.sin6_len = sizeof(struct sockaddr_in6); 6137 sin6.sin6_port = stcb->rport; 6138 #endif 6139 iph = mtod(m, struct ip *); 6140 switch (iph->ip_v) { 6141 #ifdef INET 6142 case IPVERSION: 6143 { 6144 /* its IPv4 */ 6145 struct sockaddr_in *sin_2; 6146 6147 sin_2 = (struct sockaddr_in *)(local_sa); 6148 memset(sin_2, 0, sizeof(sin)); 6149 sin_2->sin_family = AF_INET; 6150 sin_2->sin_len = sizeof(sin); 6151 sin_2->sin_port = sh->dest_port; 6152 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 6153 if (altsa) { 6154 /* 6155 * For cookies we use the src address NOT 6156 * from the packet but from the original 6157 * INIT. 6158 */ 6159 sa = altsa; 6160 } else { 6161 sin.sin_addr = iph->ip_src; 6162 sa = (struct sockaddr *)&sin; 6163 } 6164 break; 6165 } 6166 #endif 6167 #ifdef INET6 6168 case IPV6_VERSION >> 4: 6169 { 6170 /* its IPv6 */ 6171 struct ip6_hdr *ip6; 6172 struct sockaddr_in6 *sin6_2; 6173 6174 ip6 = mtod(m, struct ip6_hdr *); 6175 sin6_2 = (struct sockaddr_in6 *)(local_sa); 6176 memset(sin6_2, 0, sizeof(sin6)); 6177 sin6_2->sin6_family = AF_INET6; 6178 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 6179 sin6_2->sin6_port = sh->dest_port; 6180 sin6_2->sin6_addr = ip6->ip6_dst; 6181 if (altsa) { 6182 /* 6183 * For cookies we use the src address NOT 6184 * from the packet but from the original 6185 * INIT. 6186 */ 6187 sa = altsa; 6188 } else { 6189 sin6.sin6_addr = ip6->ip6_src; 6190 sa = (struct sockaddr *)&sin6; 6191 } 6192 break; 6193 } 6194 #endif 6195 default: 6196 return (-1); 6197 break; 6198 } 6199 /* Turn off ECN until we get through all params */ 6200 ecn_allowed = 0; 6201 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6202 /* mark all addresses that we have currently on the list */ 6203 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6204 } 6205 /* does the source address already exist? if so skip it */ 6206 inp = stcb->sctp_ep; 6207 atomic_add_int(&stcb->asoc.refcnt, 1); 6208 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 6209 atomic_add_int(&stcb->asoc.refcnt, -1); 6210 6211 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6212 /* we must add the source address */ 6213 /* no scope set here since we have a tcb already. */ 6214 switch (sa->sa_family) { 6215 #ifdef INET 6216 case AF_INET: 6217 if (stcb->asoc.ipv4_addr_legal) { 6218 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6219 return (-1); 6220 } 6221 } 6222 break; 6223 #endif 6224 #ifdef INET6 6225 case AF_INET6: 6226 if (stcb->asoc.ipv6_addr_legal) { 6227 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6228 return (-2); 6229 } 6230 } 6231 break; 6232 #endif 6233 default: 6234 break; 6235 } 6236 } else { 6237 if (net_tmp != NULL && stcb_tmp == stcb) { 6238 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6239 } else if (stcb_tmp != stcb) { 6240 /* It belongs to another association? */ 6241 if (stcb_tmp) 6242 SCTP_TCB_UNLOCK(stcb_tmp); 6243 return (-3); 6244 } 6245 } 6246 if (stcb->asoc.state == 0) { 6247 /* the assoc was freed? */ 6248 return (-4); 6249 } 6250 /* 6251 * peer must explicitly turn this on. This may have been initialized 6252 * to be "on" in order to allow local addr changes while INIT's are 6253 * in flight. 6254 */ 6255 stcb->asoc.peer_supports_asconf = 0; 6256 /* now we must go through each of the params. */ 6257 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6258 while (phdr) { 6259 ptype = ntohs(phdr->param_type); 6260 plen = ntohs(phdr->param_length); 6261 /* 6262 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6263 * (uint32_t)ptype, (int)plen); 6264 */ 6265 if (offset + plen > limit) { 6266 break; 6267 } 6268 if (plen == 0) { 6269 break; 6270 } 6271 #ifdef INET 6272 if (ptype == SCTP_IPV4_ADDRESS) { 6273 if (stcb->asoc.ipv4_addr_legal) { 6274 struct sctp_ipv4addr_param *p4, p4_buf; 6275 6276 /* ok get the v4 address and check/add */ 6277 phdr = sctp_get_next_param(m, offset, 6278 (struct sctp_paramhdr *)&p4_buf, 6279 sizeof(p4_buf)); 6280 if (plen != sizeof(struct sctp_ipv4addr_param) || 6281 phdr == NULL) { 6282 return (-5); 6283 } 6284 p4 = (struct sctp_ipv4addr_param *)phdr; 6285 sin.sin_addr.s_addr = p4->addr; 6286 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6287 /* Skip multi-cast addresses */ 6288 goto next_param; 6289 } 6290 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6291 (sin.sin_addr.s_addr == INADDR_ANY)) { 6292 goto next_param; 6293 } 6294 sa = (struct sockaddr *)&sin; 6295 inp = stcb->sctp_ep; 6296 atomic_add_int(&stcb->asoc.refcnt, 1); 6297 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6298 local_sa, stcb); 6299 atomic_add_int(&stcb->asoc.refcnt, -1); 6300 6301 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6302 inp == NULL) { 6303 /* we must add the source address */ 6304 /* 6305 * no scope set since we have a tcb 6306 * already 6307 */ 6308 6309 /* 6310 * we must validate the state again 6311 * here 6312 */ 6313 add_it_now: 6314 if (stcb->asoc.state == 0) { 6315 /* the assoc was freed? */ 6316 return (-7); 6317 } 6318 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6319 return (-8); 6320 } 6321 } else if (stcb_tmp == stcb) { 6322 if (stcb->asoc.state == 0) { 6323 /* the assoc was freed? */ 6324 return (-10); 6325 } 6326 if (net != NULL) { 6327 /* clear flag */ 6328 net->dest_state &= 6329 ~SCTP_ADDR_NOT_IN_ASSOC; 6330 } 6331 } else { 6332 /* 6333 * strange, address is in another 6334 * assoc? straighten out locks. 6335 */ 6336 if (stcb_tmp) { 6337 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6338 /* 6339 * in setup state we 6340 * abort this guy 6341 */ 6342 sctp_abort_an_association(stcb_tmp->sctp_ep, 6343 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6344 goto add_it_now; 6345 } 6346 SCTP_TCB_UNLOCK(stcb_tmp); 6347 } 6348 if (stcb->asoc.state == 0) { 6349 /* the assoc was freed? */ 6350 return (-12); 6351 } 6352 return (-13); 6353 } 6354 } 6355 } else 6356 #endif 6357 #ifdef INET6 6358 if (ptype == SCTP_IPV6_ADDRESS) { 6359 if (stcb->asoc.ipv6_addr_legal) { 6360 /* ok get the v6 address and check/add */ 6361 struct sctp_ipv6addr_param *p6, p6_buf; 6362 6363 phdr = sctp_get_next_param(m, offset, 6364 (struct sctp_paramhdr *)&p6_buf, 6365 sizeof(p6_buf)); 6366 if (plen != sizeof(struct sctp_ipv6addr_param) || 6367 phdr == NULL) { 6368 return (-14); 6369 } 6370 p6 = (struct sctp_ipv6addr_param *)phdr; 6371 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6372 sizeof(p6->addr)); 6373 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6374 /* Skip multi-cast addresses */ 6375 goto next_param; 6376 } 6377 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6378 /* 6379 * Link local make no sense without 6380 * scope 6381 */ 6382 goto next_param; 6383 } 6384 sa = (struct sockaddr *)&sin6; 6385 inp = stcb->sctp_ep; 6386 atomic_add_int(&stcb->asoc.refcnt, 1); 6387 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6388 local_sa, stcb); 6389 atomic_add_int(&stcb->asoc.refcnt, -1); 6390 if (stcb_tmp == NULL && 6391 (inp == stcb->sctp_ep || inp == NULL)) { 6392 /* 6393 * we must validate the state again 6394 * here 6395 */ 6396 add_it_now6: 6397 if (stcb->asoc.state == 0) { 6398 /* the assoc was freed? */ 6399 return (-16); 6400 } 6401 /* 6402 * we must add the address, no scope 6403 * set 6404 */ 6405 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6406 return (-17); 6407 } 6408 } else if (stcb_tmp == stcb) { 6409 /* 6410 * we must validate the state again 6411 * here 6412 */ 6413 if (stcb->asoc.state == 0) { 6414 /* the assoc was freed? */ 6415 return (-19); 6416 } 6417 if (net != NULL) { 6418 /* clear flag */ 6419 net->dest_state &= 6420 ~SCTP_ADDR_NOT_IN_ASSOC; 6421 } 6422 } else { 6423 /* 6424 * strange, address is in another 6425 * assoc? straighten out locks. 6426 */ 6427 if (stcb_tmp) 6428 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6429 /* 6430 * in setup state we 6431 * abort this guy 6432 */ 6433 sctp_abort_an_association(stcb_tmp->sctp_ep, 6434 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6435 goto add_it_now6; 6436 } 6437 SCTP_TCB_UNLOCK(stcb_tmp); 6438 6439 if (stcb->asoc.state == 0) { 6440 /* the assoc was freed? */ 6441 return (-21); 6442 } 6443 return (-22); 6444 } 6445 } 6446 } else 6447 #endif 6448 if (ptype == SCTP_ECN_CAPABLE) { 6449 ecn_allowed = 1; 6450 } else if (ptype == SCTP_ULP_ADAPTATION) { 6451 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6452 struct sctp_adaptation_layer_indication ai, 6453 *aip; 6454 6455 phdr = sctp_get_next_param(m, offset, 6456 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6457 aip = (struct sctp_adaptation_layer_indication *)phdr; 6458 if (aip) { 6459 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6460 stcb->asoc.adaptation_needed = 1; 6461 } 6462 } 6463 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6464 struct sctp_asconf_addr_param lstore, *fee; 6465 int lptype; 6466 struct sockaddr *lsa = NULL; 6467 6468 #ifdef INET 6469 struct sctp_asconf_addrv4_param *fii; 6470 6471 #endif 6472 6473 stcb->asoc.peer_supports_asconf = 1; 6474 if (plen > sizeof(lstore)) { 6475 return (-23); 6476 } 6477 phdr = sctp_get_next_param(m, offset, 6478 (struct sctp_paramhdr *)&lstore, 6479 min(plen, sizeof(lstore))); 6480 if (phdr == NULL) { 6481 return (-24); 6482 } 6483 fee = (struct sctp_asconf_addr_param *)phdr; 6484 lptype = ntohs(fee->addrp.ph.param_type); 6485 switch (lptype) { 6486 #ifdef INET 6487 case SCTP_IPV4_ADDRESS: 6488 if (plen != 6489 sizeof(struct sctp_asconf_addrv4_param)) { 6490 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6491 (int)sizeof(struct sctp_asconf_addrv4_param), 6492 plen); 6493 } else { 6494 fii = (struct sctp_asconf_addrv4_param *)fee; 6495 sin.sin_addr.s_addr = fii->addrp.addr; 6496 lsa = (struct sockaddr *)&sin; 6497 } 6498 break; 6499 #endif 6500 #ifdef INET6 6501 case SCTP_IPV6_ADDRESS: 6502 if (plen != 6503 sizeof(struct sctp_asconf_addr_param)) { 6504 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6505 (int)sizeof(struct sctp_asconf_addr_param), 6506 plen); 6507 } else { 6508 memcpy(sin6.sin6_addr.s6_addr, 6509 fee->addrp.addr, 6510 sizeof(fee->addrp.addr)); 6511 lsa = (struct sockaddr *)&sin6; 6512 } 6513 break; 6514 #endif 6515 default: 6516 break; 6517 } 6518 if (lsa) { 6519 (void)sctp_set_primary_addr(stcb, sa, NULL); 6520 } 6521 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6522 stcb->asoc.peer_supports_nat = 1; 6523 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6524 /* Peer supports pr-sctp */ 6525 stcb->asoc.peer_supports_prsctp = 1; 6526 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6527 /* A supported extension chunk */ 6528 struct sctp_supported_chunk_types_param *pr_supported; 6529 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6530 int num_ent, i; 6531 6532 phdr = sctp_get_next_param(m, offset, 6533 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6534 if (phdr == NULL) { 6535 return (-25); 6536 } 6537 stcb->asoc.peer_supports_asconf = 0; 6538 stcb->asoc.peer_supports_prsctp = 0; 6539 stcb->asoc.peer_supports_pktdrop = 0; 6540 stcb->asoc.peer_supports_strreset = 0; 6541 stcb->asoc.peer_supports_nr_sack = 0; 6542 stcb->asoc.peer_supports_auth = 0; 6543 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6544 num_ent = plen - sizeof(struct sctp_paramhdr); 6545 for (i = 0; i < num_ent; i++) { 6546 switch (pr_supported->chunk_types[i]) { 6547 case SCTP_ASCONF: 6548 case SCTP_ASCONF_ACK: 6549 stcb->asoc.peer_supports_asconf = 1; 6550 break; 6551 case SCTP_FORWARD_CUM_TSN: 6552 stcb->asoc.peer_supports_prsctp = 1; 6553 break; 6554 case SCTP_PACKET_DROPPED: 6555 stcb->asoc.peer_supports_pktdrop = 1; 6556 break; 6557 case SCTP_NR_SELECTIVE_ACK: 6558 stcb->asoc.peer_supports_nr_sack = 1; 6559 break; 6560 case SCTP_STREAM_RESET: 6561 stcb->asoc.peer_supports_strreset = 1; 6562 break; 6563 case SCTP_AUTHENTICATION: 6564 stcb->asoc.peer_supports_auth = 1; 6565 break; 6566 default: 6567 /* one I have not learned yet */ 6568 break; 6569 6570 } 6571 } 6572 } else if (ptype == SCTP_RANDOM) { 6573 if (plen > sizeof(random_store)) 6574 break; 6575 if (got_random) { 6576 /* already processed a RANDOM */ 6577 goto next_param; 6578 } 6579 phdr = sctp_get_next_param(m, offset, 6580 (struct sctp_paramhdr *)random_store, 6581 min(sizeof(random_store), plen)); 6582 if (phdr == NULL) 6583 return (-26); 6584 p_random = (struct sctp_auth_random *)phdr; 6585 random_len = plen - sizeof(*p_random); 6586 /* enforce the random length */ 6587 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6588 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6589 return (-27); 6590 } 6591 got_random = 1; 6592 } else if (ptype == SCTP_HMAC_LIST) { 6593 int num_hmacs; 6594 int i; 6595 6596 if (plen > sizeof(hmacs_store)) 6597 break; 6598 if (got_hmacs) { 6599 /* already processed a HMAC list */ 6600 goto next_param; 6601 } 6602 phdr = sctp_get_next_param(m, offset, 6603 (struct sctp_paramhdr *)hmacs_store, 6604 min(plen, sizeof(hmacs_store))); 6605 if (phdr == NULL) 6606 return (-28); 6607 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6608 hmacs_len = plen - sizeof(*hmacs); 6609 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6610 /* validate the hmac list */ 6611 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6612 return (-29); 6613 } 6614 if (stcb->asoc.peer_hmacs != NULL) 6615 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6616 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6617 if (stcb->asoc.peer_hmacs != NULL) { 6618 for (i = 0; i < num_hmacs; i++) { 6619 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6620 ntohs(hmacs->hmac_ids[i])); 6621 } 6622 } 6623 got_hmacs = 1; 6624 } else if (ptype == SCTP_CHUNK_LIST) { 6625 int i; 6626 6627 if (plen > sizeof(chunks_store)) 6628 break; 6629 if (got_chklist) { 6630 /* already processed a Chunks list */ 6631 goto next_param; 6632 } 6633 phdr = sctp_get_next_param(m, offset, 6634 (struct sctp_paramhdr *)chunks_store, 6635 min(plen, sizeof(chunks_store))); 6636 if (phdr == NULL) 6637 return (-30); 6638 chunks = (struct sctp_auth_chunk_list *)phdr; 6639 num_chunks = plen - sizeof(*chunks); 6640 if (stcb->asoc.peer_auth_chunks != NULL) 6641 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6642 else 6643 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6644 for (i = 0; i < num_chunks; i++) { 6645 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6646 stcb->asoc.peer_auth_chunks); 6647 /* record asconf/asconf-ack if listed */ 6648 if (chunks->chunk_types[i] == SCTP_ASCONF) 6649 saw_asconf = 1; 6650 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6651 saw_asconf_ack = 1; 6652 6653 } 6654 got_chklist = 1; 6655 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6656 (ptype == SCTP_STATE_COOKIE) || 6657 (ptype == SCTP_UNRECOG_PARAM) || 6658 (ptype == SCTP_COOKIE_PRESERVE) || 6659 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6660 (ptype == SCTP_ADD_IP_ADDRESS) || 6661 (ptype == SCTP_DEL_IP_ADDRESS) || 6662 (ptype == SCTP_ERROR_CAUSE_IND) || 6663 (ptype == SCTP_SUCCESS_REPORT)) { 6664 /* don't care */ ; 6665 } else { 6666 if ((ptype & 0x8000) == 0x0000) { 6667 /* 6668 * must stop processing the rest of the 6669 * param's. Any report bits were handled 6670 * with the call to 6671 * sctp_arethere_unrecognized_parameters() 6672 * when the INIT or INIT-ACK was first seen. 6673 */ 6674 break; 6675 } 6676 } 6677 6678 next_param: 6679 offset += SCTP_SIZE32(plen); 6680 if (offset >= limit) { 6681 break; 6682 } 6683 phdr = sctp_get_next_param(m, offset, &parm_buf, 6684 sizeof(parm_buf)); 6685 } 6686 /* Now check to see if we need to purge any addresses */ 6687 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6688 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6689 SCTP_ADDR_NOT_IN_ASSOC) { 6690 /* This address has been removed from the asoc */ 6691 /* remove and free it */ 6692 stcb->asoc.numnets--; 6693 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6694 sctp_free_remote_addr(net); 6695 if (net == stcb->asoc.primary_destination) { 6696 stcb->asoc.primary_destination = NULL; 6697 sctp_select_primary_destination(stcb); 6698 } 6699 } 6700 } 6701 if (ecn_allowed == 0) { 6702 stcb->asoc.ecn_allowed = 0; 6703 } 6704 /* validate authentication required parameters */ 6705 if (got_random && got_hmacs) { 6706 stcb->asoc.peer_supports_auth = 1; 6707 } else { 6708 stcb->asoc.peer_supports_auth = 0; 6709 } 6710 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6711 /* peer does not support auth but sent a chunks list? */ 6712 return (-31); 6713 } 6714 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6715 !stcb->asoc.peer_supports_auth) { 6716 /* peer supports asconf but not auth? */ 6717 return (-32); 6718 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6719 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6720 return (-33); 6721 } 6722 /* concatenate the full random key */ 6723 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6724 if (chunks != NULL) { 6725 keylen += sizeof(*chunks) + num_chunks; 6726 } 6727 new_key = sctp_alloc_key(keylen); 6728 if (new_key != NULL) { 6729 /* copy in the RANDOM */ 6730 if (p_random != NULL) { 6731 keylen = sizeof(*p_random) + random_len; 6732 bcopy(p_random, new_key->key, keylen); 6733 } 6734 /* append in the AUTH chunks */ 6735 if (chunks != NULL) { 6736 bcopy(chunks, new_key->key + keylen, 6737 sizeof(*chunks) + num_chunks); 6738 keylen += sizeof(*chunks) + num_chunks; 6739 } 6740 /* append in the HMACs */ 6741 if (hmacs != NULL) { 6742 bcopy(hmacs, new_key->key + keylen, 6743 sizeof(*hmacs) + hmacs_len); 6744 } 6745 } else { 6746 /* failed to get memory for the key */ 6747 return (-34); 6748 } 6749 if (stcb->asoc.authinfo.peer_random != NULL) 6750 sctp_free_key(stcb->asoc.authinfo.peer_random); 6751 stcb->asoc.authinfo.peer_random = new_key; 6752 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6753 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6754 6755 return (0); 6756 } 6757 6758 int 6759 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6760 struct sctp_nets *net) 6761 { 6762 /* make sure the requested primary address exists in the assoc */ 6763 if (net == NULL && sa) 6764 net = sctp_findnet(stcb, sa); 6765 6766 if (net == NULL) { 6767 /* didn't find the requested primary address! */ 6768 return (-1); 6769 } else { 6770 /* set the primary address */ 6771 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6772 /* Must be confirmed, so queue to set */ 6773 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6774 return (0); 6775 } 6776 stcb->asoc.primary_destination = net; 6777 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6778 sctp_free_remote_addr(stcb->asoc.alternate); 6779 stcb->asoc.alternate = NULL; 6780 } 6781 net = TAILQ_FIRST(&stcb->asoc.nets); 6782 if (net != stcb->asoc.primary_destination) { 6783 /* 6784 * first one on the list is NOT the primary 6785 * sctp_cmpaddr() is much more efficient if the 6786 * primary is the first on the list, make it so. 6787 */ 6788 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6789 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6790 } 6791 return (0); 6792 } 6793 } 6794 6795 int 6796 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6797 { 6798 /* 6799 * This function serves two purposes. It will see if a TAG can be 6800 * re-used and return 1 for yes it is ok and 0 for don't use that 6801 * tag. A secondary function it will do is purge out old tags that 6802 * can be removed. 6803 */ 6804 struct sctpvtaghead *chain; 6805 struct sctp_tagblock *twait_block; 6806 struct sctpasochead *head; 6807 struct sctp_tcb *stcb; 6808 int i; 6809 6810 SCTP_INP_INFO_RLOCK(); 6811 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6812 SCTP_BASE_INFO(hashasocmark))]; 6813 if (head == NULL) { 6814 /* invalid vtag */ 6815 goto skip_vtag_check; 6816 } 6817 LIST_FOREACH(stcb, head, sctp_asocs) { 6818 /* 6819 * We choose not to lock anything here. TCB's can't be 6820 * removed since we have the read lock, so they can't be 6821 * freed on us, same thing for the INP. I may be wrong with 6822 * this assumption, but we will go with it for now :-) 6823 */ 6824 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6825 continue; 6826 } 6827 if (stcb->asoc.my_vtag == tag) { 6828 /* candidate */ 6829 if (stcb->rport != rport) { 6830 continue; 6831 } 6832 if (stcb->sctp_ep->sctp_lport != lport) { 6833 continue; 6834 } 6835 /* Its a used tag set */ 6836 SCTP_INP_INFO_RUNLOCK(); 6837 return (0); 6838 } 6839 } 6840 skip_vtag_check: 6841 6842 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6843 /* Now what about timed wait ? */ 6844 if (!LIST_EMPTY(chain)) { 6845 /* 6846 * Block(s) are present, lets see if we have this tag in the 6847 * list 6848 */ 6849 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6850 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6851 if (twait_block->vtag_block[i].v_tag == 0) { 6852 /* not used */ 6853 continue; 6854 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6855 now->tv_sec) { 6856 /* Audit expires this guy */ 6857 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6858 twait_block->vtag_block[i].v_tag = 0; 6859 twait_block->vtag_block[i].lport = 0; 6860 twait_block->vtag_block[i].rport = 0; 6861 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6862 (twait_block->vtag_block[i].lport == lport) && 6863 (twait_block->vtag_block[i].rport == rport)) { 6864 /* Bad tag, sorry :< */ 6865 SCTP_INP_INFO_RUNLOCK(); 6866 return (0); 6867 } 6868 } 6869 } 6870 } 6871 SCTP_INP_INFO_RUNLOCK(); 6872 return (1); 6873 } 6874 6875 static void 6876 sctp_drain_mbufs(struct sctp_tcb *stcb) 6877 { 6878 /* 6879 * We must hunt this association for MBUF's past the cumack (i.e. 6880 * out of order data that we can renege on). 6881 */ 6882 struct sctp_association *asoc; 6883 struct sctp_tmit_chunk *chk, *nchk; 6884 uint32_t cumulative_tsn_p1; 6885 struct sctp_queued_to_read *ctl, *nctl; 6886 int cnt, strmat; 6887 uint32_t gap, i; 6888 int fnd = 0; 6889 6890 /* We look for anything larger than the cum-ack + 1 */ 6891 6892 asoc = &stcb->asoc; 6893 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6894 /* none we can reneg on. */ 6895 return; 6896 } 6897 SCTP_STAT_INCR(sctps_protocol_drains_done); 6898 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6899 cnt = 0; 6900 /* First look in the re-assembly queue */ 6901 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6902 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6903 /* Yep it is above cum-ack */ 6904 cnt++; 6905 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6906 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6907 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6908 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6909 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6910 if (chk->data) { 6911 sctp_m_freem(chk->data); 6912 chk->data = NULL; 6913 } 6914 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6915 } 6916 } 6917 /* Ok that was fun, now we will drain all the inbound streams? */ 6918 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6919 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6920 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6921 /* Yep it is above cum-ack */ 6922 cnt++; 6923 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6924 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6925 sctp_ucount_decr(asoc->cnt_on_all_streams); 6926 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6927 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6928 if (ctl->data) { 6929 sctp_m_freem(ctl->data); 6930 ctl->data = NULL; 6931 } 6932 sctp_free_remote_addr(ctl->whoFrom); 6933 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6934 SCTP_DECR_READQ_COUNT(); 6935 } 6936 } 6937 } 6938 if (cnt) { 6939 /* We must back down to see what the new highest is */ 6940 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6941 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6942 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6943 asoc->highest_tsn_inside_map = i; 6944 fnd = 1; 6945 break; 6946 } 6947 } 6948 if (!fnd) { 6949 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6950 } 6951 /* 6952 * Question, should we go through the delivery queue? The 6953 * only reason things are on here is the app not reading OR 6954 * a p-d-api up. An attacker COULD send enough in to 6955 * initiate the PD-API and then send a bunch of stuff to 6956 * other streams... these would wind up on the delivery 6957 * queue.. and then we would not get to them. But in order 6958 * to do this I then have to back-track and un-deliver 6959 * sequence numbers in streams.. el-yucko. I think for now 6960 * we will NOT look at the delivery queue and leave it to be 6961 * something to consider later. An alternative would be to 6962 * abort the P-D-API with a notification and then deliver 6963 * the data.... Or another method might be to keep track of 6964 * how many times the situation occurs and if we see a 6965 * possible attack underway just abort the association. 6966 */ 6967 #ifdef SCTP_DEBUG 6968 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6969 #endif 6970 /* 6971 * Now do we need to find a new 6972 * asoc->highest_tsn_inside_map? 6973 */ 6974 asoc->last_revoke_count = cnt; 6975 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6976 /* sa_ignore NO_NULL_CHK */ 6977 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6978 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6979 } 6980 /* 6981 * Another issue, in un-setting the TSN's in the mapping array we 6982 * DID NOT adjust the highest_tsn marker. This will cause one of 6983 * two things to occur. It may cause us to do extra work in checking 6984 * for our mapping array movement. More importantly it may cause us 6985 * to SACK every datagram. This may not be a bad thing though since 6986 * we will recover once we get our cum-ack above and all this stuff 6987 * we dumped recovered. 6988 */ 6989 } 6990 6991 void 6992 sctp_drain() 6993 { 6994 /* 6995 * We must walk the PCB lists for ALL associations here. The system 6996 * is LOW on MBUF's and needs help. This is where reneging will 6997 * occur. We really hope this does NOT happen! 6998 */ 6999 VNET_ITERATOR_DECL(vnet_iter); 7000 VNET_LIST_RLOCK_NOSLEEP(); 7001 VNET_FOREACH(vnet_iter) { 7002 CURVNET_SET(vnet_iter); 7003 struct sctp_inpcb *inp; 7004 struct sctp_tcb *stcb; 7005 7006 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7007 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7008 #ifdef VIMAGE 7009 continue; 7010 #else 7011 return; 7012 #endif 7013 } 7014 SCTP_INP_INFO_RLOCK(); 7015 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7016 /* For each endpoint */ 7017 SCTP_INP_RLOCK(inp); 7018 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7019 /* For each association */ 7020 SCTP_TCB_LOCK(stcb); 7021 sctp_drain_mbufs(stcb); 7022 SCTP_TCB_UNLOCK(stcb); 7023 } 7024 SCTP_INP_RUNLOCK(inp); 7025 } 7026 SCTP_INP_INFO_RUNLOCK(); 7027 CURVNET_RESTORE(); 7028 } 7029 VNET_LIST_RUNLOCK_NOSLEEP(); 7030 } 7031 7032 /* 7033 * start a new iterator 7034 * iterates through all endpoints and associations based on the pcb_state 7035 * flags and asoc_state. "af" (mandatory) is executed for all matching 7036 * assocs and "ef" (optional) is executed when the iterator completes. 7037 * "inpf" (optional) is executed for each new endpoint as it is being 7038 * iterated through. inpe (optional) is called when the inp completes 7039 * its way through all the stcbs. 7040 */ 7041 int 7042 sctp_initiate_iterator(inp_func inpf, 7043 asoc_func af, 7044 inp_func inpe, 7045 uint32_t pcb_state, 7046 uint32_t pcb_features, 7047 uint32_t asoc_state, 7048 void *argp, 7049 uint32_t argi, 7050 end_func ef, 7051 struct sctp_inpcb *s_inp, 7052 uint8_t chunk_output_off) 7053 { 7054 struct sctp_iterator *it = NULL; 7055 7056 if (af == NULL) { 7057 return (-1); 7058 } 7059 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7060 SCTP_M_ITER); 7061 if (it == NULL) { 7062 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7063 return (ENOMEM); 7064 } 7065 memset(it, 0, sizeof(*it)); 7066 it->function_assoc = af; 7067 it->function_inp = inpf; 7068 if (inpf) 7069 it->done_current_ep = 0; 7070 else 7071 it->done_current_ep = 1; 7072 it->function_atend = ef; 7073 it->pointer = argp; 7074 it->val = argi; 7075 it->pcb_flags = pcb_state; 7076 it->pcb_features = pcb_features; 7077 it->asoc_state = asoc_state; 7078 it->function_inp_end = inpe; 7079 it->no_chunk_output = chunk_output_off; 7080 it->vn = curvnet; 7081 if (s_inp) { 7082 /* Assume lock is held here */ 7083 it->inp = s_inp; 7084 SCTP_INP_INCR_REF(it->inp); 7085 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7086 } else { 7087 SCTP_INP_INFO_RLOCK(); 7088 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7089 if (it->inp) { 7090 SCTP_INP_INCR_REF(it->inp); 7091 } 7092 SCTP_INP_INFO_RUNLOCK(); 7093 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7094 7095 } 7096 SCTP_IPI_ITERATOR_WQ_LOCK(); 7097 7098 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7099 if (sctp_it_ctl.iterator_running == 0) { 7100 sctp_wakeup_iterator(); 7101 } 7102 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7103 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7104 return (0); 7105 } 7106