1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/sctp_dtrace_define.h> 49 #if defined(INET) || defined(INET6) 50 #include <netinet/udp.h> 51 #endif 52 #ifdef INET6 53 #include <netinet6/ip6_var.h> 54 #endif 55 #include <sys/sched.h> 56 #include <sys/smp.h> 57 #include <sys/unistd.h> 58 59 60 VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62 /* FIX: we don't handle multiple link local scopes */ 63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64 #ifdef INET6 65 int 66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67 { 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return (0); 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79 } 80 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100 } 101 102 /*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147 struct sctp_vrf * 148 sctp_allocate_vrf(int vrf_id) 149 { 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163 #ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165 #endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181 #ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183 #endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192 } 193 194 195 struct sctp_ifn * 196 sctp_find_ifn(void *ifn, uint32_t ifn_index) 197 { 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215 } 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 234 void 235 sctp_free_vrf(struct sctp_vrf *vrf) 236 { 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247 } 248 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 264 void 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266 { 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273 } 274 275 276 void 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278 { 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287 } 288 289 290 static void 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292 { 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310 } 311 312 313 void 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316 { 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352 out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354 } 355 356 357 void 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360 { 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396 out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398 } 399 400 401 /*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406 static void 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408 { 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418 #ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422 #endif 423 #ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427 #endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 434 sctp_ifnp->registered_af = ifa_af; 435 } 436 } 437 438 439 /*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445 static void 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447 { 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453 #ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457 #endif 458 #ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462 #endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488 } 489 490 491 struct sctp_ifa * 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496 { 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505 #ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508 #endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532 #ifdef INVARIANTS 533 panic("No memory for IFN"); 534 #endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608 #ifdef INVARIANTS 609 panic("No memory for IFA"); 610 #endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623 #ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = &sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641 #endif 642 #ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = &sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661 #endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 bzero(wi, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 SCTP_WQ_ADDR_UNLOCK(); 714 715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 716 (struct sctp_inpcb *)NULL, 717 (struct sctp_tcb *)NULL, 718 (struct sctp_nets *)NULL); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724 } 725 726 void 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729 { 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739 #ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742 #endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789 #ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795 #endif 796 797 out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 bzero(wi, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 SCTP_WQ_ADDR_UNLOCK(); 826 827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 828 (struct sctp_inpcb *)NULL, 829 (struct sctp_tcb *)NULL, 830 (struct sctp_nets *)NULL); 831 } 832 return; 833 } 834 835 836 static int 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838 { 839 int loopback_scope; 840 841 #if defined(INET) 842 int ipv4_local_scope, ipv4_addr_legal; 843 844 #endif 845 #if defined(INET6) 846 int local_scope, site_scope, ipv6_addr_legal; 847 848 #endif 849 struct sctp_vrf *vrf; 850 struct sctp_ifn *sctp_ifn; 851 struct sctp_ifa *sctp_ifa; 852 853 loopback_scope = stcb->asoc.scope.loopback_scope; 854 #if defined(INET) 855 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 856 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 857 #endif 858 #if defined(INET6) 859 local_scope = stcb->asoc.scope.local_scope; 860 site_scope = stcb->asoc.scope.site_scope; 861 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 862 #endif 863 864 SCTP_IPI_ADDR_RLOCK(); 865 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 866 if (vrf == NULL) { 867 /* no vrf, no addresses */ 868 SCTP_IPI_ADDR_RUNLOCK(); 869 return (0); 870 } 871 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 872 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 873 if ((loopback_scope == 0) && 874 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 875 continue; 876 } 877 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 878 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 879 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 880 /* 881 * We allow pending addresses, where 882 * we have sent an asconf-add to be 883 * considered valid. 884 */ 885 continue; 886 } 887 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 888 continue; 889 } 890 switch (sctp_ifa->address.sa.sa_family) { 891 #ifdef INET 892 case AF_INET: 893 if (ipv4_addr_legal) { 894 struct sockaddr_in *sin, 895 *rsin; 896 897 sin = &sctp_ifa->address.sin; 898 rsin = (struct sockaddr_in *)to; 899 if ((ipv4_local_scope == 0) && 900 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 901 continue; 902 } 903 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 904 &sin->sin_addr) != 0) { 905 continue; 906 } 907 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 908 SCTP_IPI_ADDR_RUNLOCK(); 909 return (1); 910 } 911 } 912 break; 913 #endif 914 #ifdef INET6 915 case AF_INET6: 916 if (ipv6_addr_legal) { 917 struct sockaddr_in6 *sin6, 918 *rsin6; 919 920 sin6 = &sctp_ifa->address.sin6; 921 rsin6 = (struct sockaddr_in6 *)to; 922 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 923 &sin6->sin6_addr) != 0) { 924 continue; 925 } 926 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 927 if (local_scope == 0) 928 continue; 929 if (sin6->sin6_scope_id == 0) { 930 if (sa6_recoverscope(sin6) != 0) 931 continue; 932 } 933 } 934 if ((site_scope == 0) && 935 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 936 continue; 937 } 938 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 939 SCTP_IPI_ADDR_RUNLOCK(); 940 return (1); 941 } 942 } 943 break; 944 #endif 945 default: 946 /* TSNH */ 947 break; 948 } 949 } 950 } 951 } else { 952 struct sctp_laddr *laddr; 953 954 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 955 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 956 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 957 continue; 958 } 959 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 960 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 961 /* 962 * We allow pending addresses, where we have 963 * sent an asconf-add to be considered 964 * valid. 965 */ 966 continue; 967 } 968 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 969 continue; 970 } 971 switch (to->sa_family) { 972 #ifdef INET 973 case AF_INET: 974 { 975 struct sockaddr_in *sin, *rsin; 976 977 sin = &laddr->ifa->address.sin; 978 rsin = (struct sockaddr_in *)to; 979 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 980 SCTP_IPI_ADDR_RUNLOCK(); 981 return (1); 982 } 983 break; 984 } 985 #endif 986 #ifdef INET6 987 case AF_INET6: 988 { 989 struct sockaddr_in6 *sin6, *rsin6; 990 991 sin6 = &laddr->ifa->address.sin6; 992 rsin6 = (struct sockaddr_in6 *)to; 993 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (1); 996 } 997 break; 998 } 999 1000 #endif 1001 default: 1002 /* TSNH */ 1003 break; 1004 } 1005 1006 } 1007 } 1008 SCTP_IPI_ADDR_RUNLOCK(); 1009 return (0); 1010 } 1011 1012 1013 static struct sctp_tcb * 1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1015 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1016 { 1017 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1018 /* 1019 * If we support the TCP model, then we must now dig through to see 1020 * if we can find our endpoint in the list of tcp ep's. 1021 */ 1022 uint16_t lport, rport; 1023 struct sctppcbhead *ephead; 1024 struct sctp_inpcb *inp; 1025 struct sctp_laddr *laddr; 1026 struct sctp_tcb *stcb; 1027 struct sctp_nets *net; 1028 1029 if ((to == NULL) || (from == NULL)) { 1030 return (NULL); 1031 } 1032 switch (to->sa_family) { 1033 #ifdef INET 1034 case AF_INET: 1035 if (from->sa_family == AF_INET) { 1036 lport = ((struct sockaddr_in *)to)->sin_port; 1037 rport = ((struct sockaddr_in *)from)->sin_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042 #endif 1043 #ifdef INET6 1044 case AF_INET6: 1045 if (from->sa_family == AF_INET6) { 1046 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1047 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1048 } else { 1049 return (NULL); 1050 } 1051 break; 1052 #endif 1053 default: 1054 return (NULL); 1055 } 1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1057 /* 1058 * Ok now for each of the guys in this bucket we must look and see: 1059 * - Does the remote port match. - Does there single association's 1060 * addresses match this address (to). If so we update p_ep to point 1061 * to this ep and return the tcb from it. 1062 */ 1063 LIST_FOREACH(inp, ephead, sctp_hash) { 1064 SCTP_INP_RLOCK(inp); 1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 if (lport != inp->sctp_lport) { 1070 SCTP_INP_RUNLOCK(inp); 1071 continue; 1072 } 1073 switch (to->sa_family) { 1074 #ifdef INET 1075 case AF_INET: 1076 { 1077 struct sockaddr_in *sin; 1078 1079 sin = (struct sockaddr_in *)to; 1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1081 &sin->sin_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 #ifdef INET6 1089 case AF_INET6: 1090 { 1091 struct sockaddr_in6 *sin6; 1092 1093 sin6 = (struct sockaddr_in6 *)to; 1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1095 &sin6->sin6_addr) != 0) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 break; 1100 } 1101 #endif 1102 default: 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 if (inp->def_vrf_id != vrf_id) { 1107 SCTP_INP_RUNLOCK(inp); 1108 continue; 1109 } 1110 /* check to see if the ep has one of the addresses */ 1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1112 /* We are NOT bound all, so look further */ 1113 int match = 0; 1114 1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1116 1117 if (laddr->ifa == NULL) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1119 continue; 1120 } 1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1123 continue; 1124 } 1125 if (laddr->ifa->address.sa.sa_family == 1126 to->sa_family) { 1127 /* see if it matches */ 1128 #ifdef INET 1129 if (from->sa_family == AF_INET) { 1130 struct sockaddr_in *intf_addr, 1131 *sin; 1132 1133 intf_addr = &laddr->ifa->address.sin; 1134 sin = (struct sockaddr_in *)to; 1135 if (sin->sin_addr.s_addr == 1136 intf_addr->sin_addr.s_addr) { 1137 match = 1; 1138 break; 1139 } 1140 } 1141 #endif 1142 #ifdef INET6 1143 if (from->sa_family == AF_INET6) { 1144 struct sockaddr_in6 *intf_addr6; 1145 struct sockaddr_in6 *sin6; 1146 1147 sin6 = (struct sockaddr_in6 *) 1148 to; 1149 intf_addr6 = &laddr->ifa->address.sin6; 1150 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1152 intf_addr6)) { 1153 match = 1; 1154 break; 1155 } 1156 } 1157 #endif 1158 } 1159 } 1160 if (match == 0) { 1161 /* This endpoint does not have this address */ 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 } 1166 /* 1167 * Ok if we hit here the ep has the address, does it hold 1168 * the tcb? 1169 */ 1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1171 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1172 if (stcb == NULL) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 SCTP_TCB_LOCK(stcb); 1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->rport != rport) { 1183 /* remote port does not match. */ 1184 SCTP_TCB_UNLOCK(stcb); 1185 SCTP_INP_RUNLOCK(inp); 1186 continue; 1187 } 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 continue; 1197 } 1198 /* Does this TCB have a matching address? */ 1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200 1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1202 /* not the same family, can't be a match */ 1203 continue; 1204 } 1205 switch (from->sa_family) { 1206 #ifdef INET 1207 case AF_INET: 1208 { 1209 struct sockaddr_in *sin, *rsin; 1210 1211 sin = (struct sockaddr_in *)&net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)from; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 /* 1220 * Update the endpoint 1221 * pointer 1222 */ 1223 *inp_p = inp; 1224 SCTP_INP_RUNLOCK(inp); 1225 return (stcb); 1226 } 1227 break; 1228 } 1229 #endif 1230 #ifdef INET6 1231 case AF_INET6: 1232 { 1233 struct sockaddr_in6 *sin6, *rsin6; 1234 1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1236 rsin6 = (struct sockaddr_in6 *)from; 1237 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1238 rsin6)) { 1239 /* found it */ 1240 if (netp != NULL) { 1241 *netp = net; 1242 } 1243 /* 1244 * Update the endpoint 1245 * pointer 1246 */ 1247 *inp_p = inp; 1248 SCTP_INP_RUNLOCK(inp); 1249 return (stcb); 1250 } 1251 break; 1252 } 1253 #endif 1254 default: 1255 /* TSNH */ 1256 break; 1257 } 1258 } 1259 SCTP_TCB_UNLOCK(stcb); 1260 SCTP_INP_RUNLOCK(inp); 1261 } 1262 return (NULL); 1263 } 1264 1265 1266 /* 1267 * rules for use 1268 * 1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1272 * NULL. 1273 */ 1274 1275 struct sctp_tcb * 1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1278 { 1279 struct sctpasochead *head; 1280 struct sctp_inpcb *inp; 1281 struct sctp_tcb *stcb = NULL; 1282 struct sctp_nets *net; 1283 uint16_t rport; 1284 1285 inp = *inp_p; 1286 switch (remote->sa_family) { 1287 #ifdef INET 1288 case AF_INET: 1289 rport = (((struct sockaddr_in *)remote)->sin_port); 1290 break; 1291 #endif 1292 #ifdef INET6 1293 case AF_INET6: 1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1295 break; 1296 #endif 1297 default: 1298 return (NULL); 1299 } 1300 if (locked_tcb) { 1301 /* 1302 * UN-lock so we can do proper locking here this occurs when 1303 * called from load_addresses_from_init. 1304 */ 1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1306 SCTP_TCB_UNLOCK(locked_tcb); 1307 } 1308 SCTP_INP_INFO_RLOCK(); 1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1311 /*- 1312 * Now either this guy is our listener or it's the 1313 * connector. If it is the one that issued the connect, then 1314 * it's only chance is to be the first TCB in the list. If 1315 * it is the acceptor, then do the special_lookup to hash 1316 * and find the real inp. 1317 */ 1318 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1319 /* to is peer addr, from is my addr */ 1320 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1321 netp, inp->def_vrf_id); 1322 if ((stcb != NULL) && (locked_tcb == NULL)) { 1323 /* we have a locked tcb, lower refcount */ 1324 SCTP_INP_DECR_REF(inp); 1325 } 1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1328 SCTP_TCB_LOCK(locked_tcb); 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1331 } 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } else { 1335 SCTP_INP_WLOCK(inp); 1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1337 goto null_return; 1338 } 1339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1340 if (stcb == NULL) { 1341 goto null_return; 1342 } 1343 SCTP_TCB_LOCK(stcb); 1344 1345 if (stcb->rport != rport) { 1346 /* remote port does not match. */ 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1355 SCTP_TCB_UNLOCK(stcb); 1356 goto null_return; 1357 } 1358 /* now look at the list of remote addresses */ 1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1360 #ifdef INVARIANTS 1361 if (net == (TAILQ_NEXT(net, sctp_next))) { 1362 panic("Corrupt net list"); 1363 } 1364 #endif 1365 if (net->ro._l_addr.sa.sa_family != 1366 remote->sa_family) { 1367 /* not the same family */ 1368 continue; 1369 } 1370 switch (remote->sa_family) { 1371 #ifdef INET 1372 case AF_INET: 1373 { 1374 struct sockaddr_in *sin, 1375 *rsin; 1376 1377 sin = (struct sockaddr_in *) 1378 &net->ro._l_addr; 1379 rsin = (struct sockaddr_in *)remote; 1380 if (sin->sin_addr.s_addr == 1381 rsin->sin_addr.s_addr) { 1382 /* found it */ 1383 if (netp != NULL) { 1384 *netp = net; 1385 } 1386 if (locked_tcb == NULL) { 1387 SCTP_INP_DECR_REF(inp); 1388 } else if (locked_tcb != stcb) { 1389 SCTP_TCB_LOCK(locked_tcb); 1390 } 1391 if (locked_tcb) { 1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1393 } 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400 #endif 1401 #ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429 #endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1445 if (stcb->rport != rport) { 1446 /* remote port does not match */ 1447 continue; 1448 } 1449 SCTP_TCB_LOCK(stcb); 1450 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1455 SCTP_TCB_UNLOCK(stcb); 1456 continue; 1457 } 1458 /* now look at the list of remote addresses */ 1459 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1460 #ifdef INVARIANTS 1461 if (net == (TAILQ_NEXT(net, sctp_next))) { 1462 panic("Corrupt net list"); 1463 } 1464 #endif 1465 if (net->ro._l_addr.sa.sa_family != 1466 remote->sa_family) { 1467 /* not the same family */ 1468 continue; 1469 } 1470 switch (remote->sa_family) { 1471 #ifdef INET 1472 case AF_INET: 1473 { 1474 struct sockaddr_in *sin, 1475 *rsin; 1476 1477 sin = (struct sockaddr_in *) 1478 &net->ro._l_addr; 1479 rsin = (struct sockaddr_in *)remote; 1480 if (sin->sin_addr.s_addr == 1481 rsin->sin_addr.s_addr) { 1482 /* found it */ 1483 if (netp != NULL) { 1484 *netp = net; 1485 } 1486 if (locked_tcb == NULL) { 1487 SCTP_INP_DECR_REF(inp); 1488 } else if (locked_tcb != stcb) { 1489 SCTP_TCB_LOCK(locked_tcb); 1490 } 1491 if (locked_tcb) { 1492 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1493 } 1494 SCTP_INP_WUNLOCK(inp); 1495 SCTP_INP_INFO_RUNLOCK(); 1496 return (stcb); 1497 } 1498 break; 1499 } 1500 #endif 1501 #ifdef INET6 1502 case AF_INET6: 1503 { 1504 struct sockaddr_in6 *sin6, 1505 *rsin6; 1506 1507 sin6 = (struct sockaddr_in6 *) 1508 &net->ro._l_addr; 1509 rsin6 = (struct sockaddr_in6 *)remote; 1510 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1511 rsin6)) { 1512 /* found it */ 1513 if (netp != NULL) { 1514 *netp = net; 1515 } 1516 if (locked_tcb == NULL) { 1517 SCTP_INP_DECR_REF(inp); 1518 } else if (locked_tcb != stcb) { 1519 SCTP_TCB_LOCK(locked_tcb); 1520 } 1521 if (locked_tcb) { 1522 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1523 } 1524 SCTP_INP_WUNLOCK(inp); 1525 SCTP_INP_INFO_RUNLOCK(); 1526 return (stcb); 1527 } 1528 break; 1529 } 1530 #endif 1531 default: 1532 /* TSNH */ 1533 break; 1534 } 1535 } 1536 SCTP_TCB_UNLOCK(stcb); 1537 } 1538 } 1539 null_return: 1540 /* clean up for returning null */ 1541 if (locked_tcb) { 1542 SCTP_TCB_LOCK(locked_tcb); 1543 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1544 } 1545 SCTP_INP_WUNLOCK(inp); 1546 SCTP_INP_INFO_RUNLOCK(); 1547 /* not found */ 1548 return (NULL); 1549 } 1550 1551 1552 /* 1553 * Find an association for a specific endpoint using the association id given 1554 * out in the COMM_UP notification 1555 */ 1556 struct sctp_tcb * 1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1558 { 1559 /* 1560 * Use my the assoc_id to find a endpoint 1561 */ 1562 struct sctpasochead *head; 1563 struct sctp_tcb *stcb; 1564 uint32_t id; 1565 1566 if (inp == NULL) { 1567 SCTP_PRINTF("TSNH ep_associd\n"); 1568 return (NULL); 1569 } 1570 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1571 SCTP_PRINTF("TSNH ep_associd0\n"); 1572 return (NULL); 1573 } 1574 id = (uint32_t) asoc_id; 1575 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1576 if (head == NULL) { 1577 /* invalid id TSNH */ 1578 SCTP_PRINTF("TSNH ep_associd1\n"); 1579 return (NULL); 1580 } 1581 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1582 if (stcb->asoc.assoc_id == id) { 1583 if (inp != stcb->sctp_ep) { 1584 /* 1585 * some other guy has the same id active (id 1586 * collision ??). 1587 */ 1588 SCTP_PRINTF("TSNH ep_associd2\n"); 1589 continue; 1590 } 1591 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1592 continue; 1593 } 1594 if (want_lock) { 1595 SCTP_TCB_LOCK(stcb); 1596 } 1597 return (stcb); 1598 } 1599 } 1600 return (NULL); 1601 } 1602 1603 1604 struct sctp_tcb * 1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1606 { 1607 struct sctp_tcb *stcb; 1608 1609 SCTP_INP_RLOCK(inp); 1610 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1611 SCTP_INP_RUNLOCK(inp); 1612 return (stcb); 1613 } 1614 1615 1616 /* 1617 * Endpoint probe expects that the INP_INFO is locked. 1618 */ 1619 static struct sctp_inpcb * 1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1621 uint16_t lport, uint32_t vrf_id) 1622 { 1623 struct sctp_inpcb *inp; 1624 struct sctp_laddr *laddr; 1625 1626 #ifdef INET 1627 struct sockaddr_in *sin; 1628 1629 #endif 1630 #ifdef INET6 1631 struct sockaddr_in6 *sin6; 1632 struct sockaddr_in6 *intf_addr6; 1633 1634 #endif 1635 int fnd; 1636 1637 #ifdef INET 1638 sin = NULL; 1639 #endif 1640 #ifdef INET6 1641 sin6 = NULL; 1642 #endif 1643 switch (nam->sa_family) { 1644 #ifdef INET 1645 case AF_INET: 1646 sin = (struct sockaddr_in *)nam; 1647 break; 1648 #endif 1649 #ifdef INET6 1650 case AF_INET6: 1651 sin6 = (struct sockaddr_in6 *)nam; 1652 break; 1653 #endif 1654 default: 1655 /* unsupported family */ 1656 return (NULL); 1657 } 1658 1659 if (head == NULL) 1660 return (NULL); 1661 1662 LIST_FOREACH(inp, head, sctp_hash) { 1663 SCTP_INP_RLOCK(inp); 1664 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1665 SCTP_INP_RUNLOCK(inp); 1666 continue; 1667 } 1668 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1669 (inp->sctp_lport == lport)) { 1670 /* got it */ 1671 switch (nam->sa_family) { 1672 #ifdef INET 1673 case AF_INET: 1674 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1675 SCTP_IPV6_V6ONLY(inp)) { 1676 /* 1677 * IPv4 on a IPv6 socket with ONLY 1678 * IPv6 set 1679 */ 1680 SCTP_INP_RUNLOCK(inp); 1681 continue; 1682 } 1683 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1684 &sin->sin_addr) != 0) { 1685 SCTP_INP_RUNLOCK(inp); 1686 continue; 1687 } 1688 break; 1689 #endif 1690 #ifdef INET6 1691 case AF_INET6: 1692 /* 1693 * A V6 address and the endpoint is NOT 1694 * bound V6 1695 */ 1696 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1697 SCTP_INP_RUNLOCK(inp); 1698 continue; 1699 } 1700 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1701 &sin6->sin6_addr) != 0) { 1702 SCTP_INP_RUNLOCK(inp); 1703 continue; 1704 } 1705 break; 1706 #endif 1707 default: 1708 break; 1709 } 1710 /* does a VRF id match? */ 1711 fnd = 0; 1712 if (inp->def_vrf_id == vrf_id) 1713 fnd = 1; 1714 1715 SCTP_INP_RUNLOCK(inp); 1716 if (!fnd) 1717 continue; 1718 return (inp); 1719 } 1720 SCTP_INP_RUNLOCK(inp); 1721 } 1722 switch (nam->sa_family) { 1723 #ifdef INET 1724 case AF_INET: 1725 if (sin->sin_addr.s_addr == INADDR_ANY) { 1726 /* Can't hunt for one that has no address specified */ 1727 return (NULL); 1728 } 1729 break; 1730 #endif 1731 #ifdef INET6 1732 case AF_INET6: 1733 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1734 /* Can't hunt for one that has no address specified */ 1735 return (NULL); 1736 } 1737 break; 1738 #endif 1739 default: 1740 break; 1741 } 1742 /* 1743 * ok, not bound to all so see if we can find a EP bound to this 1744 * address. 1745 */ 1746 LIST_FOREACH(inp, head, sctp_hash) { 1747 SCTP_INP_RLOCK(inp); 1748 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1749 SCTP_INP_RUNLOCK(inp); 1750 continue; 1751 } 1752 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1753 SCTP_INP_RUNLOCK(inp); 1754 continue; 1755 } 1756 /* 1757 * Ok this could be a likely candidate, look at all of its 1758 * addresses 1759 */ 1760 if (inp->sctp_lport != lport) { 1761 SCTP_INP_RUNLOCK(inp); 1762 continue; 1763 } 1764 /* does a VRF id match? */ 1765 fnd = 0; 1766 if (inp->def_vrf_id == vrf_id) 1767 fnd = 1; 1768 1769 if (!fnd) { 1770 SCTP_INP_RUNLOCK(inp); 1771 continue; 1772 } 1773 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1774 if (laddr->ifa == NULL) { 1775 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1776 __func__); 1777 continue; 1778 } 1779 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1780 (void *)laddr->ifa); 1781 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1783 continue; 1784 } 1785 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1786 /* possible, see if it matches */ 1787 switch (nam->sa_family) { 1788 #ifdef INET 1789 case AF_INET: 1790 if (sin->sin_addr.s_addr == 1791 laddr->ifa->address.sin.sin_addr.s_addr) { 1792 SCTP_INP_RUNLOCK(inp); 1793 return (inp); 1794 } 1795 break; 1796 #endif 1797 #ifdef INET6 1798 case AF_INET6: 1799 intf_addr6 = &laddr->ifa->address.sin6; 1800 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1801 intf_addr6)) { 1802 SCTP_INP_RUNLOCK(inp); 1803 return (inp); 1804 } 1805 break; 1806 #endif 1807 } 1808 } 1809 } 1810 SCTP_INP_RUNLOCK(inp); 1811 } 1812 return (NULL); 1813 } 1814 1815 1816 static struct sctp_inpcb * 1817 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1818 { 1819 struct sctppcbhead *head; 1820 struct sctp_inpcb *t_inp; 1821 int fnd; 1822 1823 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1824 SCTP_BASE_INFO(hashmark))]; 1825 LIST_FOREACH(t_inp, head, sctp_hash) { 1826 if (t_inp->sctp_lport != lport) { 1827 continue; 1828 } 1829 /* is it in the VRF in question */ 1830 fnd = 0; 1831 if (t_inp->def_vrf_id == vrf_id) 1832 fnd = 1; 1833 if (!fnd) 1834 continue; 1835 1836 /* This one is in use. */ 1837 /* check the v6/v4 binding issue */ 1838 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1839 SCTP_IPV6_V6ONLY(t_inp)) { 1840 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1841 /* collision in V6 space */ 1842 return (t_inp); 1843 } else { 1844 /* inp is BOUND_V4 no conflict */ 1845 continue; 1846 } 1847 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1848 /* t_inp is bound v4 and v6, conflict always */ 1849 return (t_inp); 1850 } else { 1851 /* t_inp is bound only V4 */ 1852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1853 SCTP_IPV6_V6ONLY(inp)) { 1854 /* no conflict */ 1855 continue; 1856 } 1857 /* else fall through to conflict */ 1858 } 1859 return (t_inp); 1860 } 1861 return (NULL); 1862 } 1863 1864 1865 int 1866 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1867 { 1868 /* For 1-2-1 with port reuse */ 1869 struct sctppcbhead *head; 1870 struct sctp_inpcb *tinp, *ninp; 1871 1872 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1873 /* only works with port reuse on */ 1874 return (-1); 1875 } 1876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1877 return (0); 1878 } 1879 SCTP_INP_RUNLOCK(inp); 1880 SCTP_INP_INFO_WLOCK(); 1881 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1882 SCTP_BASE_INFO(hashmark))]; 1883 /* Kick out all non-listeners to the TCP hash */ 1884 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1885 if (tinp->sctp_lport != inp->sctp_lport) { 1886 continue; 1887 } 1888 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1889 continue; 1890 } 1891 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1892 continue; 1893 } 1894 if (tinp->sctp_socket->so_qlimit) { 1895 continue; 1896 } 1897 SCTP_INP_WLOCK(tinp); 1898 LIST_REMOVE(tinp, sctp_hash); 1899 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1900 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1901 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1902 SCTP_INP_WUNLOCK(tinp); 1903 } 1904 SCTP_INP_WLOCK(inp); 1905 /* Pull from where he was */ 1906 LIST_REMOVE(inp, sctp_hash); 1907 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1908 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1909 LIST_INSERT_HEAD(head, inp, sctp_hash); 1910 SCTP_INP_WUNLOCK(inp); 1911 SCTP_INP_RLOCK(inp); 1912 SCTP_INP_INFO_WUNLOCK(); 1913 return (0); 1914 } 1915 1916 1917 struct sctp_inpcb * 1918 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1919 uint32_t vrf_id) 1920 { 1921 /* 1922 * First we check the hash table to see if someone has this port 1923 * bound with just the port. 1924 */ 1925 struct sctp_inpcb *inp; 1926 struct sctppcbhead *head; 1927 int lport; 1928 unsigned int i; 1929 1930 #ifdef INET 1931 struct sockaddr_in *sin; 1932 1933 #endif 1934 #ifdef INET6 1935 struct sockaddr_in6 *sin6; 1936 1937 #endif 1938 1939 switch (nam->sa_family) { 1940 #ifdef INET 1941 case AF_INET: 1942 sin = (struct sockaddr_in *)nam; 1943 lport = sin->sin_port; 1944 break; 1945 #endif 1946 #ifdef INET6 1947 case AF_INET6: 1948 sin6 = (struct sockaddr_in6 *)nam; 1949 lport = sin6->sin6_port; 1950 break; 1951 #endif 1952 default: 1953 return (NULL); 1954 } 1955 /* 1956 * I could cheat here and just cast to one of the types but we will 1957 * do it right. It also provides the check against an Unsupported 1958 * type too. 1959 */ 1960 /* Find the head of the ALLADDR chain */ 1961 if (have_lock == 0) { 1962 SCTP_INP_INFO_RLOCK(); 1963 } 1964 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1965 SCTP_BASE_INFO(hashmark))]; 1966 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1967 1968 /* 1969 * If the TCP model exists it could be that the main listening 1970 * endpoint is gone but there still exists a connected socket for 1971 * this guy. If so we can return the first one that we find. This 1972 * may NOT be the correct one so the caller should be wary on the 1973 * returned INP. Currently the only caller that sets find_tcp_pool 1974 * is in bindx where we are verifying that a user CAN bind the 1975 * address. He either has bound it already, or someone else has, or 1976 * its open to bind, so this is good enough. 1977 */ 1978 if (inp == NULL && find_tcp_pool) { 1979 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1980 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1981 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1982 if (inp) { 1983 break; 1984 } 1985 } 1986 } 1987 if (inp) { 1988 SCTP_INP_INCR_REF(inp); 1989 } 1990 if (have_lock == 0) { 1991 SCTP_INP_INFO_RUNLOCK(); 1992 } 1993 return (inp); 1994 } 1995 1996 1997 /* 1998 * Find an association for an endpoint with the pointer to whom you want to 1999 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2000 * need to change the *to to some other struct like a mbuf... 2001 */ 2002 struct sctp_tcb * 2003 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2004 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2005 uint32_t vrf_id) 2006 { 2007 struct sctp_inpcb *inp = NULL; 2008 struct sctp_tcb *stcb; 2009 2010 SCTP_INP_INFO_RLOCK(); 2011 if (find_tcp_pool) { 2012 if (inp_p != NULL) { 2013 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2014 vrf_id); 2015 } else { 2016 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2017 vrf_id); 2018 } 2019 if (stcb != NULL) { 2020 SCTP_INP_INFO_RUNLOCK(); 2021 return (stcb); 2022 } 2023 } 2024 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2025 if (inp_p != NULL) { 2026 *inp_p = inp; 2027 } 2028 SCTP_INP_INFO_RUNLOCK(); 2029 if (inp == NULL) { 2030 return (NULL); 2031 } 2032 /* 2033 * ok, we have an endpoint, now lets find the assoc for it (if any) 2034 * we now place the source address or from in the to of the find 2035 * endpoint call. Since in reality this chain is used from the 2036 * inbound packet side. 2037 */ 2038 if (inp_p != NULL) { 2039 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2040 NULL); 2041 } else { 2042 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2043 NULL); 2044 } 2045 return (stcb); 2046 } 2047 2048 2049 /* 2050 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2051 * find all addresses that the sender has specified in any address list. Each 2052 * address will be used to lookup the TCB and see if one exits. 2053 */ 2054 static struct sctp_tcb * 2055 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2056 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2057 struct sockaddr *dst) 2058 { 2059 struct sctp_paramhdr *phdr, parm_buf; 2060 2061 #if defined(INET) || defined(INET6) 2062 struct sctp_tcb *stcb; 2063 uint16_t ptype; 2064 2065 #endif 2066 uint16_t plen; 2067 2068 #ifdef INET 2069 struct sockaddr_in sin4; 2070 2071 #endif 2072 #ifdef INET6 2073 struct sockaddr_in6 sin6; 2074 2075 #endif 2076 2077 #ifdef INET 2078 memset(&sin4, 0, sizeof(sin4)); 2079 sin4.sin_len = sizeof(sin4); 2080 sin4.sin_family = AF_INET; 2081 sin4.sin_port = sh->src_port; 2082 #endif 2083 #ifdef INET6 2084 memset(&sin6, 0, sizeof(sin6)); 2085 sin6.sin6_len = sizeof(sin6); 2086 sin6.sin6_family = AF_INET6; 2087 sin6.sin6_port = sh->src_port; 2088 #endif 2089 2090 offset += sizeof(struct sctp_init_chunk); 2091 2092 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2093 while (phdr != NULL) { 2094 /* now we must see if we want the parameter */ 2095 #if defined(INET) || defined(INET6) 2096 ptype = ntohs(phdr->param_type); 2097 #endif 2098 plen = ntohs(phdr->param_length); 2099 if (plen == 0) { 2100 break; 2101 } 2102 #ifdef INET 2103 if (ptype == SCTP_IPV4_ADDRESS && 2104 plen == sizeof(struct sctp_ipv4addr_param)) { 2105 /* Get the rest of the address */ 2106 struct sctp_ipv4addr_param ip4_parm, *p4; 2107 2108 phdr = sctp_get_next_param(m, offset, 2109 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2110 if (phdr == NULL) { 2111 return (NULL); 2112 } 2113 p4 = (struct sctp_ipv4addr_param *)phdr; 2114 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2115 /* look it up */ 2116 stcb = sctp_findassociation_ep_addr(inp_p, 2117 (struct sockaddr *)&sin4, netp, dst, NULL); 2118 if (stcb != NULL) { 2119 return (stcb); 2120 } 2121 } 2122 #endif 2123 #ifdef INET6 2124 if (ptype == SCTP_IPV6_ADDRESS && 2125 plen == sizeof(struct sctp_ipv6addr_param)) { 2126 /* Get the rest of the address */ 2127 struct sctp_ipv6addr_param ip6_parm, *p6; 2128 2129 phdr = sctp_get_next_param(m, offset, 2130 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2131 if (phdr == NULL) { 2132 return (NULL); 2133 } 2134 p6 = (struct sctp_ipv6addr_param *)phdr; 2135 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2136 /* look it up */ 2137 stcb = sctp_findassociation_ep_addr(inp_p, 2138 (struct sockaddr *)&sin6, netp, dst, NULL); 2139 if (stcb != NULL) { 2140 return (stcb); 2141 } 2142 } 2143 #endif 2144 offset += SCTP_SIZE32(plen); 2145 phdr = sctp_get_next_param(m, offset, &parm_buf, 2146 sizeof(parm_buf)); 2147 } 2148 return (NULL); 2149 } 2150 2151 static struct sctp_tcb * 2152 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2153 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2154 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2155 { 2156 /* 2157 * Use my vtag to hash. If we find it we then verify the source addr 2158 * is in the assoc. If all goes well we save a bit on rec of a 2159 * packet. 2160 */ 2161 struct sctpasochead *head; 2162 struct sctp_nets *net; 2163 struct sctp_tcb *stcb; 2164 2165 SCTP_INP_INFO_RLOCK(); 2166 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2167 SCTP_BASE_INFO(hashasocmark))]; 2168 LIST_FOREACH(stcb, head, sctp_asocs) { 2169 SCTP_INP_RLOCK(stcb->sctp_ep); 2170 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2171 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2172 continue; 2173 } 2174 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2175 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2176 continue; 2177 } 2178 SCTP_TCB_LOCK(stcb); 2179 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2180 if (stcb->asoc.my_vtag == vtag) { 2181 /* candidate */ 2182 if (stcb->rport != rport) { 2183 SCTP_TCB_UNLOCK(stcb); 2184 continue; 2185 } 2186 if (stcb->sctp_ep->sctp_lport != lport) { 2187 SCTP_TCB_UNLOCK(stcb); 2188 continue; 2189 } 2190 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2191 SCTP_TCB_UNLOCK(stcb); 2192 continue; 2193 } 2194 /* RRS:Need toaddr check here */ 2195 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2196 /* Endpoint does not own this address */ 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 if (remote_tag) { 2201 /* 2202 * If we have both vtags that's all we match 2203 * on 2204 */ 2205 if (stcb->asoc.peer_vtag == remote_tag) { 2206 /* 2207 * If both tags match we consider it 2208 * conclusive and check NO 2209 * source/destination addresses 2210 */ 2211 goto conclusive; 2212 } 2213 } 2214 if (skip_src_check) { 2215 conclusive: 2216 if (from) { 2217 *netp = sctp_findnet(stcb, from); 2218 } else { 2219 *netp = NULL; /* unknown */ 2220 } 2221 if (inp_p) 2222 *inp_p = stcb->sctp_ep; 2223 SCTP_INP_INFO_RUNLOCK(); 2224 return (stcb); 2225 } 2226 net = sctp_findnet(stcb, from); 2227 if (net) { 2228 /* yep its him. */ 2229 *netp = net; 2230 SCTP_STAT_INCR(sctps_vtagexpress); 2231 *inp_p = stcb->sctp_ep; 2232 SCTP_INP_INFO_RUNLOCK(); 2233 return (stcb); 2234 } else { 2235 /* 2236 * not him, this should only happen in rare 2237 * cases so I peg it. 2238 */ 2239 SCTP_STAT_INCR(sctps_vtagbogus); 2240 } 2241 } 2242 SCTP_TCB_UNLOCK(stcb); 2243 } 2244 SCTP_INP_INFO_RUNLOCK(); 2245 return (NULL); 2246 } 2247 2248 2249 /* 2250 * Find an association with the pointer to the inbound IP packet. This can be 2251 * a IPv4 or IPv6 packet. 2252 */ 2253 struct sctp_tcb * 2254 sctp_findassociation_addr(struct mbuf *m, int offset, 2255 struct sockaddr *src, struct sockaddr *dst, 2256 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2257 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2258 { 2259 int find_tcp_pool; 2260 struct sctp_tcb *stcb; 2261 struct sctp_inpcb *inp; 2262 2263 if (sh->v_tag) { 2264 /* we only go down this path if vtag is non-zero */ 2265 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2266 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2267 if (stcb) { 2268 return (stcb); 2269 } 2270 } 2271 find_tcp_pool = 0; 2272 /* 2273 * Don't consider INIT chunks since that breaks 1-to-1 sockets: When 2274 * a server closes the listener, incoming INIT chunks are not 2275 * responsed by an INIT-ACK chunk. 2276 */ 2277 if ((ch->chunk_type != SCTP_INITIATION_ACK) && 2278 (ch->chunk_type != SCTP_COOKIE_ACK) && 2279 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2280 /* Other chunk types go to the tcp pool. */ 2281 find_tcp_pool = 1; 2282 } 2283 if (inp_p) { 2284 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2285 find_tcp_pool, vrf_id); 2286 inp = *inp_p; 2287 } else { 2288 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2289 find_tcp_pool, vrf_id); 2290 } 2291 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2292 if (stcb == NULL && inp) { 2293 /* Found a EP but not this address */ 2294 if ((ch->chunk_type == SCTP_INITIATION) || 2295 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2296 /*- 2297 * special hook, we do NOT return linp or an 2298 * association that is linked to an existing 2299 * association that is under the TCP pool (i.e. no 2300 * listener exists). The endpoint finding routine 2301 * will always find a listener before examining the 2302 * TCP pool. 2303 */ 2304 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2305 if (inp_p) { 2306 *inp_p = NULL; 2307 } 2308 return (NULL); 2309 } 2310 stcb = sctp_findassociation_special_addr(m, 2311 offset, sh, &inp, netp, dst); 2312 if (inp_p != NULL) { 2313 *inp_p = inp; 2314 } 2315 } 2316 } 2317 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2318 return (stcb); 2319 } 2320 2321 /* 2322 * lookup an association by an ASCONF lookup address. 2323 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2324 */ 2325 struct sctp_tcb * 2326 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2327 struct sockaddr *dst, struct sctphdr *sh, 2328 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2329 { 2330 struct sctp_tcb *stcb; 2331 union sctp_sockstore remote_store; 2332 struct sctp_paramhdr parm_buf, *phdr; 2333 int ptype; 2334 int zero_address = 0; 2335 2336 #ifdef INET 2337 struct sockaddr_in *sin; 2338 2339 #endif 2340 #ifdef INET6 2341 struct sockaddr_in6 *sin6; 2342 2343 #endif 2344 2345 memset(&remote_store, 0, sizeof(remote_store)); 2346 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2347 &parm_buf, sizeof(struct sctp_paramhdr)); 2348 if (phdr == NULL) { 2349 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2350 __func__); 2351 return NULL; 2352 } 2353 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2354 /* get the correlation address */ 2355 switch (ptype) { 2356 #ifdef INET6 2357 case SCTP_IPV6_ADDRESS: 2358 { 2359 /* ipv6 address param */ 2360 struct sctp_ipv6addr_param *p6, p6_buf; 2361 2362 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2363 return NULL; 2364 } 2365 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2366 offset + sizeof(struct sctp_asconf_chunk), 2367 &p6_buf.ph, sizeof(*p6)); 2368 if (p6 == NULL) { 2369 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2370 __func__); 2371 return (NULL); 2372 } 2373 sin6 = &remote_store.sin6; 2374 sin6->sin6_family = AF_INET6; 2375 sin6->sin6_len = sizeof(*sin6); 2376 sin6->sin6_port = sh->src_port; 2377 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2378 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2379 zero_address = 1; 2380 break; 2381 } 2382 #endif 2383 #ifdef INET 2384 case SCTP_IPV4_ADDRESS: 2385 { 2386 /* ipv4 address param */ 2387 struct sctp_ipv4addr_param *p4, p4_buf; 2388 2389 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2390 return NULL; 2391 } 2392 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2393 offset + sizeof(struct sctp_asconf_chunk), 2394 &p4_buf.ph, sizeof(*p4)); 2395 if (p4 == NULL) { 2396 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2397 __func__); 2398 return (NULL); 2399 } 2400 sin = &remote_store.sin; 2401 sin->sin_family = AF_INET; 2402 sin->sin_len = sizeof(*sin); 2403 sin->sin_port = sh->src_port; 2404 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2405 if (sin->sin_addr.s_addr == INADDR_ANY) 2406 zero_address = 1; 2407 break; 2408 } 2409 #endif 2410 default: 2411 /* invalid address param type */ 2412 return NULL; 2413 } 2414 2415 if (zero_address) { 2416 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2417 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2418 if (stcb != NULL) { 2419 SCTP_INP_DECR_REF(*inp_p); 2420 } 2421 } else { 2422 stcb = sctp_findassociation_ep_addr(inp_p, 2423 &remote_store.sa, netp, 2424 dst, NULL); 2425 } 2426 return (stcb); 2427 } 2428 2429 2430 /* 2431 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2432 * addresses. This way if we don't get a bind we by default pick a ephemeral 2433 * port with all addresses bound. 2434 */ 2435 int 2436 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2437 { 2438 /* 2439 * we get called when a new endpoint starts up. We need to allocate 2440 * the sctp_inpcb structure from the zone and init it. Mark it as 2441 * unbound and find a port that we can use as an ephemeral with 2442 * INADDR_ANY. If the user binds later no problem we can then add in 2443 * the specific addresses. And setup the default parameters for the 2444 * EP. 2445 */ 2446 int i, error; 2447 struct sctp_inpcb *inp; 2448 struct sctp_pcb *m; 2449 struct timeval time; 2450 sctp_sharedkey_t *null_key; 2451 2452 error = 0; 2453 2454 SCTP_INP_INFO_WLOCK(); 2455 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2456 if (inp == NULL) { 2457 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2458 SCTP_INP_INFO_WUNLOCK(); 2459 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2460 return (ENOBUFS); 2461 } 2462 /* zap it */ 2463 bzero(inp, sizeof(*inp)); 2464 2465 /* bump generations */ 2466 /* setup socket pointers */ 2467 inp->sctp_socket = so; 2468 inp->ip_inp.inp.inp_socket = so; 2469 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2470 #ifdef INET6 2471 if (INP_SOCKAF(so) == AF_INET6) { 2472 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2473 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2474 } 2475 if (MODULE_GLOBAL(ip6_v6only)) { 2476 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2477 } 2478 } 2479 #endif 2480 inp->sctp_associd_counter = 1; 2481 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2482 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2483 inp->max_cwnd = 0; 2484 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2485 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2486 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2487 inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable); 2488 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2489 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2490 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2491 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2492 inp->fibnum = so->so_fibnum; 2493 /* init the small hash table we use to track asocid <-> tcb */ 2494 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2495 if (inp->sctp_asocidhash == NULL) { 2496 crfree(inp->ip_inp.inp.inp_cred); 2497 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2498 SCTP_INP_INFO_WUNLOCK(); 2499 return (ENOBUFS); 2500 } 2501 #ifdef IPSEC 2502 error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp); 2503 if (error != 0) { 2504 crfree(inp->ip_inp.inp.inp_cred); 2505 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2506 SCTP_INP_INFO_WUNLOCK(); 2507 return error; 2508 } 2509 #endif /* IPSEC */ 2510 SCTP_INCR_EP_COUNT(); 2511 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2512 SCTP_INP_INFO_WUNLOCK(); 2513 2514 so->so_pcb = (caddr_t)inp; 2515 2516 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2517 /* UDP style socket */ 2518 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2519 SCTP_PCB_FLAGS_UNBOUND); 2520 /* Be sure it is NON-BLOCKING IO for UDP */ 2521 /* SCTP_SET_SO_NBIO(so); */ 2522 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2523 /* TCP style socket */ 2524 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2525 SCTP_PCB_FLAGS_UNBOUND); 2526 /* Be sure we have blocking IO by default */ 2527 SCTP_CLEAR_SO_NBIO(so); 2528 } else { 2529 /* 2530 * unsupported socket type (RAW, etc)- in case we missed it 2531 * in protosw 2532 */ 2533 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2534 so->so_pcb = NULL; 2535 crfree(inp->ip_inp.inp.inp_cred); 2536 #ifdef IPSEC 2537 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2538 #endif 2539 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2540 return (EOPNOTSUPP); 2541 } 2542 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2543 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2544 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2545 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2546 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2547 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2548 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2549 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2550 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2551 } 2552 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2553 &inp->sctp_hashmark); 2554 if (inp->sctp_tcbhash == NULL) { 2555 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2556 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2557 so->so_pcb = NULL; 2558 crfree(inp->ip_inp.inp.inp_cred); 2559 #ifdef IPSEC 2560 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2561 #endif 2562 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2563 return (ENOBUFS); 2564 } 2565 inp->def_vrf_id = vrf_id; 2566 2567 SCTP_INP_INFO_WLOCK(); 2568 SCTP_INP_LOCK_INIT(inp); 2569 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2570 SCTP_INP_READ_INIT(inp); 2571 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2572 /* lock the new ep */ 2573 SCTP_INP_WLOCK(inp); 2574 2575 /* add it to the info area */ 2576 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2577 SCTP_INP_INFO_WUNLOCK(); 2578 2579 TAILQ_INIT(&inp->read_queue); 2580 LIST_INIT(&inp->sctp_addr_list); 2581 2582 LIST_INIT(&inp->sctp_asoc_list); 2583 2584 #ifdef SCTP_TRACK_FREED_ASOCS 2585 /* TEMP CODE */ 2586 LIST_INIT(&inp->sctp_asoc_free_list); 2587 #endif 2588 /* Init the timer structure for signature change */ 2589 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2590 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2591 2592 /* now init the actual endpoint default data */ 2593 m = &inp->sctp_ep; 2594 2595 /* setup the base timeout information */ 2596 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2597 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2598 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2599 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2600 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2601 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2602 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2603 /* all max/min max are in ms */ 2604 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2605 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2606 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2607 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2608 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2609 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2610 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2611 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2612 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2613 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2614 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2615 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2616 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2617 2618 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2619 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2620 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2621 /* number of streams to pre-open on a association */ 2622 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2623 2624 /* Add adaptation cookie */ 2625 m->adaptation_layer_indicator = 0; 2626 m->adaptation_layer_indicator_provided = 0; 2627 2628 /* seed random number generator */ 2629 m->random_counter = 1; 2630 m->store_at = SCTP_SIGNATURE_SIZE; 2631 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2632 sctp_fill_random_store(m); 2633 2634 /* Minimum cookie size */ 2635 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2636 sizeof(struct sctp_state_cookie); 2637 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2638 2639 /* Setup the initial secret */ 2640 (void)SCTP_GETTIME_TIMEVAL(&time); 2641 m->time_of_secret_change = time.tv_sec; 2642 2643 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2644 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2645 } 2646 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2647 2648 /* How long is a cookie good for ? */ 2649 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2650 /* 2651 * Initialize authentication parameters 2652 */ 2653 m->local_hmacs = sctp_default_supported_hmaclist(); 2654 m->local_auth_chunks = sctp_alloc_chunklist(); 2655 if (inp->asconf_supported) { 2656 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2657 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2658 } 2659 m->default_dscp = 0; 2660 #ifdef INET6 2661 m->default_flowlabel = 0; 2662 #endif 2663 m->port = 0; /* encapsulation disabled by default */ 2664 LIST_INIT(&m->shared_keys); 2665 /* add default NULL key as key id 0 */ 2666 null_key = sctp_alloc_sharedkey(); 2667 sctp_insert_sharedkey(&m->shared_keys, null_key); 2668 SCTP_INP_WUNLOCK(inp); 2669 #ifdef SCTP_LOG_CLOSING 2670 sctp_log_closing(inp, NULL, 12); 2671 #endif 2672 return (error); 2673 } 2674 2675 2676 void 2677 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2678 struct sctp_tcb *stcb) 2679 { 2680 struct sctp_nets *net; 2681 uint16_t lport, rport; 2682 struct sctppcbhead *head; 2683 struct sctp_laddr *laddr, *oladdr; 2684 2685 atomic_add_int(&stcb->asoc.refcnt, 1); 2686 SCTP_TCB_UNLOCK(stcb); 2687 SCTP_INP_INFO_WLOCK(); 2688 SCTP_INP_WLOCK(old_inp); 2689 SCTP_INP_WLOCK(new_inp); 2690 SCTP_TCB_LOCK(stcb); 2691 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2692 2693 new_inp->sctp_ep.time_of_secret_change = 2694 old_inp->sctp_ep.time_of_secret_change; 2695 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2696 sizeof(old_inp->sctp_ep.secret_key)); 2697 new_inp->sctp_ep.current_secret_number = 2698 old_inp->sctp_ep.current_secret_number; 2699 new_inp->sctp_ep.last_secret_number = 2700 old_inp->sctp_ep.last_secret_number; 2701 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2702 2703 /* make it so new data pours into the new socket */ 2704 stcb->sctp_socket = new_inp->sctp_socket; 2705 stcb->sctp_ep = new_inp; 2706 2707 /* Copy the port across */ 2708 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2709 rport = stcb->rport; 2710 /* Pull the tcb from the old association */ 2711 LIST_REMOVE(stcb, sctp_tcbhash); 2712 LIST_REMOVE(stcb, sctp_tcblist); 2713 if (stcb->asoc.in_asocid_hash) { 2714 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2715 } 2716 /* Now insert the new_inp into the TCP connected hash */ 2717 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2718 2719 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2720 /* Its safe to access */ 2721 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2722 2723 /* Now move the tcb into the endpoint list */ 2724 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2725 /* 2726 * Question, do we even need to worry about the ep-hash since we 2727 * only have one connection? Probably not :> so lets get rid of it 2728 * and not suck up any kernel memory in that. 2729 */ 2730 if (stcb->asoc.in_asocid_hash) { 2731 struct sctpasochead *lhd; 2732 2733 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2734 new_inp->hashasocidmark)]; 2735 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2736 } 2737 /* Ok. Let's restart timer. */ 2738 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2739 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2740 stcb, net); 2741 } 2742 2743 SCTP_INP_INFO_WUNLOCK(); 2744 if (new_inp->sctp_tcbhash != NULL) { 2745 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2746 new_inp->sctp_tcbhash = NULL; 2747 } 2748 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2749 /* Subset bound, so copy in the laddr list from the old_inp */ 2750 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2751 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2752 if (laddr == NULL) { 2753 /* 2754 * Gak, what can we do? This assoc is really 2755 * HOSED. We probably should send an abort 2756 * here. 2757 */ 2758 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2759 continue; 2760 } 2761 SCTP_INCR_LADDR_COUNT(); 2762 bzero(laddr, sizeof(*laddr)); 2763 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2764 laddr->ifa = oladdr->ifa; 2765 atomic_add_int(&laddr->ifa->refcount, 1); 2766 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2767 sctp_nxt_addr); 2768 new_inp->laddr_count++; 2769 if (oladdr == stcb->asoc.last_used_address) { 2770 stcb->asoc.last_used_address = laddr; 2771 } 2772 } 2773 } 2774 /* 2775 * Now any running timers need to be adjusted since we really don't 2776 * care if they are running or not just blast in the new_inp into 2777 * all of them. 2778 */ 2779 2780 stcb->asoc.dack_timer.ep = (void *)new_inp; 2781 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2782 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2783 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2784 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2785 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2786 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2787 /* now what about the nets? */ 2788 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2789 net->pmtu_timer.ep = (void *)new_inp; 2790 net->hb_timer.ep = (void *)new_inp; 2791 net->rxt_timer.ep = (void *)new_inp; 2792 } 2793 SCTP_INP_WUNLOCK(new_inp); 2794 SCTP_INP_WUNLOCK(old_inp); 2795 } 2796 2797 2798 2799 2800 /* sctp_ifap is used to bypass normal local address validation checks */ 2801 int 2802 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2803 struct sctp_ifa *sctp_ifap, struct thread *p) 2804 { 2805 /* bind a ep to a socket address */ 2806 struct sctppcbhead *head; 2807 struct sctp_inpcb *inp, *inp_tmp; 2808 struct inpcb *ip_inp; 2809 int port_reuse_active = 0; 2810 int bindall; 2811 uint16_t lport; 2812 int error; 2813 uint32_t vrf_id; 2814 2815 lport = 0; 2816 bindall = 1; 2817 inp = (struct sctp_inpcb *)so->so_pcb; 2818 ip_inp = (struct inpcb *)so->so_pcb; 2819 #ifdef SCTP_DEBUG 2820 if (addr) { 2821 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2822 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2823 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2824 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2825 } 2826 #endif 2827 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2828 /* already did a bind, subsequent binds NOT allowed ! */ 2829 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2830 return (EINVAL); 2831 } 2832 #ifdef INVARIANTS 2833 if (p == NULL) 2834 panic("null proc/thread"); 2835 #endif 2836 if (addr != NULL) { 2837 switch (addr->sa_family) { 2838 #ifdef INET 2839 case AF_INET: 2840 { 2841 struct sockaddr_in *sin; 2842 2843 /* IPV6_V6ONLY socket? */ 2844 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2845 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2846 return (EINVAL); 2847 } 2848 if (addr->sa_len != sizeof(*sin)) { 2849 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2850 return (EINVAL); 2851 } 2852 sin = (struct sockaddr_in *)addr; 2853 lport = sin->sin_port; 2854 /* 2855 * For LOOPBACK the prison_local_ip4() call 2856 * will transmute the ip address to the 2857 * proper value. 2858 */ 2859 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2860 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2861 return (error); 2862 } 2863 if (sin->sin_addr.s_addr != INADDR_ANY) { 2864 bindall = 0; 2865 } 2866 break; 2867 } 2868 #endif 2869 #ifdef INET6 2870 case AF_INET6: 2871 { 2872 /* 2873 * Only for pure IPv6 Address. (No IPv4 2874 * Mapped!) 2875 */ 2876 struct sockaddr_in6 *sin6; 2877 2878 sin6 = (struct sockaddr_in6 *)addr; 2879 2880 if (addr->sa_len != sizeof(*sin6)) { 2881 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2882 return (EINVAL); 2883 } 2884 lport = sin6->sin6_port; 2885 /* 2886 * For LOOPBACK the prison_local_ip6() call 2887 * will transmute the ipv6 address to the 2888 * proper value. 2889 */ 2890 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2891 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2892 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2893 return (error); 2894 } 2895 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2896 bindall = 0; 2897 /* KAME hack: embed scopeid */ 2898 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2899 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2900 return (EINVAL); 2901 } 2902 } 2903 /* this must be cleared for ifa_ifwithaddr() */ 2904 sin6->sin6_scope_id = 0; 2905 break; 2906 } 2907 #endif 2908 default: 2909 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2910 return (EAFNOSUPPORT); 2911 } 2912 } 2913 SCTP_INP_INFO_WLOCK(); 2914 SCTP_INP_WLOCK(inp); 2915 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2916 vrf_id = inp->def_vrf_id; 2917 2918 /* increase our count due to the unlock we do */ 2919 SCTP_INP_INCR_REF(inp); 2920 if (lport) { 2921 /* 2922 * Did the caller specify a port? if so we must see if an ep 2923 * already has this one bound. 2924 */ 2925 /* got to be root to get at low ports */ 2926 if (ntohs(lport) < IPPORT_RESERVED) { 2927 if (p && (error = 2928 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2929 )) { 2930 SCTP_INP_DECR_REF(inp); 2931 SCTP_INP_WUNLOCK(inp); 2932 SCTP_INP_INFO_WUNLOCK(); 2933 return (error); 2934 } 2935 } 2936 SCTP_INP_WUNLOCK(inp); 2937 if (bindall) { 2938 vrf_id = inp->def_vrf_id; 2939 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2940 if (inp_tmp != NULL) { 2941 /* 2942 * lock guy returned and lower count note 2943 * that we are not bound so inp_tmp should 2944 * NEVER be inp. And it is this inp 2945 * (inp_tmp) that gets the reference bump, 2946 * so we must lower it. 2947 */ 2948 SCTP_INP_DECR_REF(inp_tmp); 2949 /* unlock info */ 2950 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2951 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2952 /* 2953 * Ok, must be one-2-one and 2954 * allowing port re-use 2955 */ 2956 port_reuse_active = 1; 2957 goto continue_anyway; 2958 } 2959 SCTP_INP_DECR_REF(inp); 2960 SCTP_INP_INFO_WUNLOCK(); 2961 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2962 return (EADDRINUSE); 2963 } 2964 } else { 2965 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2966 if (inp_tmp != NULL) { 2967 /* 2968 * lock guy returned and lower count note 2969 * that we are not bound so inp_tmp should 2970 * NEVER be inp. And it is this inp 2971 * (inp_tmp) that gets the reference bump, 2972 * so we must lower it. 2973 */ 2974 SCTP_INP_DECR_REF(inp_tmp); 2975 /* unlock info */ 2976 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2977 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2978 /* 2979 * Ok, must be one-2-one and 2980 * allowing port re-use 2981 */ 2982 port_reuse_active = 1; 2983 goto continue_anyway; 2984 } 2985 SCTP_INP_DECR_REF(inp); 2986 SCTP_INP_INFO_WUNLOCK(); 2987 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2988 return (EADDRINUSE); 2989 } 2990 } 2991 continue_anyway: 2992 SCTP_INP_WLOCK(inp); 2993 if (bindall) { 2994 /* verify that no lport is not used by a singleton */ 2995 if ((port_reuse_active == 0) && 2996 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2997 /* Sorry someone already has this one bound */ 2998 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2999 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3000 port_reuse_active = 1; 3001 } else { 3002 SCTP_INP_DECR_REF(inp); 3003 SCTP_INP_WUNLOCK(inp); 3004 SCTP_INP_INFO_WUNLOCK(); 3005 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3006 return (EADDRINUSE); 3007 } 3008 } 3009 } 3010 } else { 3011 uint16_t first, last, candidate; 3012 uint16_t count; 3013 int done; 3014 3015 if (ip_inp->inp_flags & INP_HIGHPORT) { 3016 first = MODULE_GLOBAL(ipport_hifirstauto); 3017 last = MODULE_GLOBAL(ipport_hilastauto); 3018 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3019 if (p && (error = 3020 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3021 )) { 3022 SCTP_INP_DECR_REF(inp); 3023 SCTP_INP_WUNLOCK(inp); 3024 SCTP_INP_INFO_WUNLOCK(); 3025 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3026 return (error); 3027 } 3028 first = MODULE_GLOBAL(ipport_lowfirstauto); 3029 last = MODULE_GLOBAL(ipport_lowlastauto); 3030 } else { 3031 first = MODULE_GLOBAL(ipport_firstauto); 3032 last = MODULE_GLOBAL(ipport_lastauto); 3033 } 3034 if (first > last) { 3035 uint16_t temp; 3036 3037 temp = first; 3038 first = last; 3039 last = temp; 3040 } 3041 count = last - first + 1; /* number of candidates */ 3042 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3043 3044 done = 0; 3045 while (!done) { 3046 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3047 done = 1; 3048 } 3049 if (!done) { 3050 if (--count == 0) { 3051 SCTP_INP_DECR_REF(inp); 3052 SCTP_INP_WUNLOCK(inp); 3053 SCTP_INP_INFO_WUNLOCK(); 3054 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3055 return (EADDRINUSE); 3056 } 3057 if (candidate == last) 3058 candidate = first; 3059 else 3060 candidate = candidate + 1; 3061 } 3062 } 3063 lport = htons(candidate); 3064 } 3065 SCTP_INP_DECR_REF(inp); 3066 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3067 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3068 /* 3069 * this really should not happen. The guy did a non-blocking 3070 * bind and then did a close at the same time. 3071 */ 3072 SCTP_INP_WUNLOCK(inp); 3073 SCTP_INP_INFO_WUNLOCK(); 3074 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3075 return (EINVAL); 3076 } 3077 /* ok we look clear to give out this port, so lets setup the binding */ 3078 if (bindall) { 3079 /* binding to all addresses, so just set in the proper flags */ 3080 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3081 /* set the automatic addr changes from kernel flag */ 3082 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3083 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3084 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3085 } else { 3086 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3087 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3088 } 3089 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3090 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3091 } else { 3092 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3093 } 3094 /* 3095 * set the automatic mobility_base from kernel flag (by 3096 * micchie) 3097 */ 3098 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3099 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3100 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3101 } else { 3102 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3103 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3104 } 3105 /* 3106 * set the automatic mobility_fasthandoff from kernel flag 3107 * (by micchie) 3108 */ 3109 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3110 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3111 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3112 } else { 3113 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3114 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3115 } 3116 } else { 3117 /* 3118 * bind specific, make sure flags is off and add a new 3119 * address structure to the sctp_addr_list inside the ep 3120 * structure. 3121 * 3122 * We will need to allocate one and insert it at the head. The 3123 * socketopt call can just insert new addresses in there as 3124 * well. It will also have to do the embed scope kame hack 3125 * too (before adding). 3126 */ 3127 struct sctp_ifa *ifa; 3128 union sctp_sockstore store; 3129 3130 memset(&store, 0, sizeof(store)); 3131 switch (addr->sa_family) { 3132 #ifdef INET 3133 case AF_INET: 3134 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3135 store.sin.sin_port = 0; 3136 break; 3137 #endif 3138 #ifdef INET6 3139 case AF_INET6: 3140 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3141 store.sin6.sin6_port = 0; 3142 break; 3143 #endif 3144 default: 3145 break; 3146 } 3147 /* 3148 * first find the interface with the bound address need to 3149 * zero out the port to find the address! yuck! can't do 3150 * this earlier since need port for sctp_pcb_findep() 3151 */ 3152 if (sctp_ifap != NULL) { 3153 ifa = sctp_ifap; 3154 } else { 3155 /* 3156 * Note for BSD we hit here always other O/S's will 3157 * pass things in via the sctp_ifap argument 3158 * (Panda). 3159 */ 3160 ifa = sctp_find_ifa_by_addr(&store.sa, 3161 vrf_id, SCTP_ADDR_NOT_LOCKED); 3162 } 3163 if (ifa == NULL) { 3164 /* Can't find an interface with that address */ 3165 SCTP_INP_WUNLOCK(inp); 3166 SCTP_INP_INFO_WUNLOCK(); 3167 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3168 return (EADDRNOTAVAIL); 3169 } 3170 #ifdef INET6 3171 if (addr->sa_family == AF_INET6) { 3172 /* GAK, more FIXME IFA lock? */ 3173 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3174 /* Can't bind a non-existent addr. */ 3175 SCTP_INP_WUNLOCK(inp); 3176 SCTP_INP_INFO_WUNLOCK(); 3177 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3178 return (EINVAL); 3179 } 3180 } 3181 #endif 3182 /* we're not bound all */ 3183 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3184 /* allow bindx() to send ASCONF's for binding changes */ 3185 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3186 /* clear automatic addr changes from kernel flag */ 3187 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3188 3189 /* add this address to the endpoint list */ 3190 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3191 if (error != 0) { 3192 SCTP_INP_WUNLOCK(inp); 3193 SCTP_INP_INFO_WUNLOCK(); 3194 return (error); 3195 } 3196 inp->laddr_count++; 3197 } 3198 /* find the bucket */ 3199 if (port_reuse_active) { 3200 /* Put it into tcp 1-2-1 hash */ 3201 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3202 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3203 } else { 3204 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3205 } 3206 /* put it in the bucket */ 3207 LIST_INSERT_HEAD(head, inp, sctp_hash); 3208 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3209 (void *)head, ntohs(lport), port_reuse_active); 3210 /* set in the port */ 3211 inp->sctp_lport = lport; 3212 3213 /* turn off just the unbound flag */ 3214 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3215 SCTP_INP_WUNLOCK(inp); 3216 SCTP_INP_INFO_WUNLOCK(); 3217 return (0); 3218 } 3219 3220 3221 static void 3222 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3223 { 3224 struct sctp_iterator *it, *nit; 3225 3226 /* 3227 * We enter with the only the ITERATOR_LOCK in place and a write 3228 * lock on the inp_info stuff. 3229 */ 3230 it = sctp_it_ctl.cur_it; 3231 if (it && (it->vn != curvnet)) { 3232 /* Its not looking at our VNET */ 3233 return; 3234 } 3235 if (it && (it->inp == inp)) { 3236 /* 3237 * This is tricky and we hold the iterator lock, but when it 3238 * returns and gets the lock (when we release it) the 3239 * iterator will try to operate on inp. We need to stop that 3240 * from happening. But of course the iterator has a 3241 * reference on the stcb and inp. We can mark it and it will 3242 * stop. 3243 * 3244 * If its a single iterator situation, we set the end iterator 3245 * flag. Otherwise we set the iterator to go to the next 3246 * inp. 3247 * 3248 */ 3249 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3250 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3251 } else { 3252 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3253 } 3254 } 3255 /* 3256 * Now go through and remove any single reference to our inp that 3257 * may be still pending on the list 3258 */ 3259 SCTP_IPI_ITERATOR_WQ_LOCK(); 3260 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3261 if (it->vn != curvnet) { 3262 continue; 3263 } 3264 if (it->inp == inp) { 3265 /* This one points to me is it inp specific? */ 3266 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3267 /* Remove and free this one */ 3268 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3269 it, sctp_nxt_itr); 3270 if (it->function_atend != NULL) { 3271 (*it->function_atend) (it->pointer, it->val); 3272 } 3273 SCTP_FREE(it, SCTP_M_ITER); 3274 } else { 3275 it->inp = LIST_NEXT(it->inp, sctp_list); 3276 if (it->inp) { 3277 SCTP_INP_INCR_REF(it->inp); 3278 } 3279 } 3280 /* 3281 * When its put in the refcnt is incremented so decr 3282 * it 3283 */ 3284 SCTP_INP_DECR_REF(inp); 3285 } 3286 } 3287 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3288 } 3289 3290 /* release sctp_inpcb unbind the port */ 3291 void 3292 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3293 { 3294 /* 3295 * Here we free a endpoint. We must find it (if it is in the Hash 3296 * table) and remove it from there. Then we must also find it in the 3297 * overall list and remove it from there. After all removals are 3298 * complete then any timer has to be stopped. Then start the actual 3299 * freeing. a) Any local lists. b) Any associations. c) The hash of 3300 * all associations. d) finally the ep itself. 3301 */ 3302 struct sctp_tcb *asoc, *nasoc; 3303 struct sctp_laddr *laddr, *nladdr; 3304 struct inpcb *ip_pcb; 3305 struct socket *so; 3306 int being_refed = 0; 3307 struct sctp_queued_to_read *sq, *nsq; 3308 int cnt; 3309 sctp_sharedkey_t *shared_key, *nshared_key; 3310 3311 3312 #ifdef SCTP_LOG_CLOSING 3313 sctp_log_closing(inp, NULL, 0); 3314 #endif 3315 SCTP_ITERATOR_LOCK(); 3316 /* mark any iterators on the list or being processed */ 3317 sctp_iterator_inp_being_freed(inp); 3318 SCTP_ITERATOR_UNLOCK(); 3319 so = inp->sctp_socket; 3320 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3321 /* been here before.. eeks.. get out of here */ 3322 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3323 #ifdef SCTP_LOG_CLOSING 3324 sctp_log_closing(inp, NULL, 1); 3325 #endif 3326 return; 3327 } 3328 SCTP_ASOC_CREATE_LOCK(inp); 3329 SCTP_INP_INFO_WLOCK(); 3330 3331 SCTP_INP_WLOCK(inp); 3332 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3333 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3334 /* socket is gone, so no more wakeups allowed */ 3335 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3336 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3337 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3338 3339 } 3340 /* First time through we have the socket lock, after that no more. */ 3341 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3342 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3343 3344 if (inp->control) { 3345 sctp_m_freem(inp->control); 3346 inp->control = NULL; 3347 } 3348 if (inp->pkt) { 3349 sctp_m_freem(inp->pkt); 3350 inp->pkt = NULL; 3351 } 3352 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3353 * here but I will be nice :> (i.e. 3354 * ip_pcb = ep;) */ 3355 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3356 int cnt_in_sd; 3357 3358 cnt_in_sd = 0; 3359 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3360 SCTP_TCB_LOCK(asoc); 3361 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3362 /* Skip guys being freed */ 3363 cnt_in_sd++; 3364 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3365 /* 3366 * Special case - we did not start a 3367 * kill timer on the asoc due to it 3368 * was not closed. So go ahead and 3369 * start it now. 3370 */ 3371 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3372 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3373 } 3374 SCTP_TCB_UNLOCK(asoc); 3375 continue; 3376 } 3377 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3378 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3379 (asoc->asoc.total_output_queue_size == 0)) { 3380 /* 3381 * If we have data in queue, we don't want 3382 * to just free since the app may have done, 3383 * send()/close or connect/send/close. And 3384 * it wants the data to get across first. 3385 */ 3386 /* Just abandon things in the front states */ 3387 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3388 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3389 cnt_in_sd++; 3390 } 3391 continue; 3392 } 3393 /* Disconnect the socket please */ 3394 asoc->sctp_socket = NULL; 3395 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3396 if ((asoc->asoc.size_on_reasm_queue > 0) || 3397 (asoc->asoc.control_pdapi) || 3398 (asoc->asoc.size_on_all_streams > 0) || 3399 (so && (so->so_rcv.sb_cc > 0))) { 3400 /* Left with Data unread */ 3401 struct mbuf *op_err; 3402 3403 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3404 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3405 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3406 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3407 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3408 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3409 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3410 } 3411 if (sctp_free_assoc(inp, asoc, 3412 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3413 cnt_in_sd++; 3414 } 3415 continue; 3416 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3417 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3418 (asoc->asoc.stream_queue_cnt == 0)) { 3419 if (asoc->asoc.locked_on_sending) { 3420 goto abort_anyway; 3421 } 3422 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3423 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3424 struct sctp_nets *netp; 3425 3426 /* 3427 * there is nothing queued to send, 3428 * so I send shutdown 3429 */ 3430 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3431 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3432 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3433 } 3434 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3435 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3436 sctp_stop_timers_for_shutdown(asoc); 3437 if (asoc->asoc.alternate) { 3438 netp = asoc->asoc.alternate; 3439 } else { 3440 netp = asoc->asoc.primary_destination; 3441 } 3442 sctp_send_shutdown(asoc, netp); 3443 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3444 netp); 3445 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3446 asoc->asoc.primary_destination); 3447 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3448 } 3449 } else { 3450 /* mark into shutdown pending */ 3451 struct sctp_stream_queue_pending *sp; 3452 3453 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3454 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3455 asoc->asoc.primary_destination); 3456 if (asoc->asoc.locked_on_sending) { 3457 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3458 sctp_streamhead); 3459 if (sp == NULL) { 3460 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3461 (void *)asoc->asoc.locked_on_sending, 3462 asoc->asoc.locked_on_sending->stream_no); 3463 } else { 3464 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3465 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3466 } 3467 } 3468 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3469 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3470 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3471 struct mbuf *op_err; 3472 3473 abort_anyway: 3474 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3475 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3476 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3477 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3478 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3479 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3480 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3481 } 3482 if (sctp_free_assoc(inp, asoc, 3483 SCTP_PCBFREE_NOFORCE, 3484 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3485 cnt_in_sd++; 3486 } 3487 continue; 3488 } else { 3489 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3490 } 3491 } 3492 cnt_in_sd++; 3493 SCTP_TCB_UNLOCK(asoc); 3494 } 3495 /* now is there some left in our SHUTDOWN state? */ 3496 if (cnt_in_sd) { 3497 #ifdef SCTP_LOG_CLOSING 3498 sctp_log_closing(inp, NULL, 2); 3499 #endif 3500 inp->sctp_socket = NULL; 3501 SCTP_INP_WUNLOCK(inp); 3502 SCTP_ASOC_CREATE_UNLOCK(inp); 3503 SCTP_INP_INFO_WUNLOCK(); 3504 return; 3505 } 3506 } 3507 inp->sctp_socket = NULL; 3508 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3509 SCTP_PCB_FLAGS_UNBOUND) { 3510 /* 3511 * ok, this guy has been bound. It's port is somewhere in 3512 * the SCTP_BASE_INFO(hash table). Remove it! 3513 */ 3514 LIST_REMOVE(inp, sctp_hash); 3515 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3516 } 3517 /* 3518 * If there is a timer running to kill us, forget it, since it may 3519 * have a contest on the INP lock.. which would cause us to die ... 3520 */ 3521 cnt = 0; 3522 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3523 SCTP_TCB_LOCK(asoc); 3524 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3525 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3526 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3527 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3528 } 3529 cnt++; 3530 SCTP_TCB_UNLOCK(asoc); 3531 continue; 3532 } 3533 /* Free associations that are NOT killing us */ 3534 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3535 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3536 struct mbuf *op_err; 3537 3538 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3539 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3540 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3541 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3542 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3543 cnt++; 3544 SCTP_TCB_UNLOCK(asoc); 3545 continue; 3546 } 3547 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3548 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3549 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3550 } 3551 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3552 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3553 cnt++; 3554 } 3555 } 3556 if (cnt) { 3557 /* Ok we have someone out there that will kill us */ 3558 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3559 #ifdef SCTP_LOG_CLOSING 3560 sctp_log_closing(inp, NULL, 3); 3561 #endif 3562 SCTP_INP_WUNLOCK(inp); 3563 SCTP_ASOC_CREATE_UNLOCK(inp); 3564 SCTP_INP_INFO_WUNLOCK(); 3565 return; 3566 } 3567 if (SCTP_INP_LOCK_CONTENDED(inp)) 3568 being_refed++; 3569 if (SCTP_INP_READ_CONTENDED(inp)) 3570 being_refed++; 3571 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3572 being_refed++; 3573 3574 if ((inp->refcount) || 3575 (being_refed) || 3576 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3577 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3578 #ifdef SCTP_LOG_CLOSING 3579 sctp_log_closing(inp, NULL, 4); 3580 #endif 3581 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3582 SCTP_INP_WUNLOCK(inp); 3583 SCTP_ASOC_CREATE_UNLOCK(inp); 3584 SCTP_INP_INFO_WUNLOCK(); 3585 return; 3586 } 3587 inp->sctp_ep.signature_change.type = 0; 3588 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3589 /* 3590 * Remove it from the list .. last thing we need a lock for. 3591 */ 3592 LIST_REMOVE(inp, sctp_list); 3593 SCTP_INP_WUNLOCK(inp); 3594 SCTP_ASOC_CREATE_UNLOCK(inp); 3595 SCTP_INP_INFO_WUNLOCK(); 3596 /* 3597 * Now we release all locks. Since this INP cannot be found anymore 3598 * except possibly by the kill timer that might be running. We call 3599 * the drain function here. It should hit the case were it sees the 3600 * ACTIVE flag cleared and exit out freeing us to proceed and 3601 * destroy everything. 3602 */ 3603 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3604 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3605 } else { 3606 /* Probably un-needed */ 3607 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3608 } 3609 3610 #ifdef SCTP_LOG_CLOSING 3611 sctp_log_closing(inp, NULL, 5); 3612 #endif 3613 3614 3615 if ((inp->sctp_asocidhash) != NULL) { 3616 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3617 inp->sctp_asocidhash = NULL; 3618 } 3619 /* sa_ignore FREED_MEMORY */ 3620 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3621 /* Its only abandoned if it had data left */ 3622 if (sq->length) 3623 SCTP_STAT_INCR(sctps_left_abandon); 3624 3625 TAILQ_REMOVE(&inp->read_queue, sq, next); 3626 sctp_free_remote_addr(sq->whoFrom); 3627 if (so) 3628 so->so_rcv.sb_cc -= sq->length; 3629 if (sq->data) { 3630 sctp_m_freem(sq->data); 3631 sq->data = NULL; 3632 } 3633 /* 3634 * no need to free the net count, since at this point all 3635 * assoc's are gone. 3636 */ 3637 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3638 SCTP_DECR_READQ_COUNT(); 3639 } 3640 /* Now the sctp_pcb things */ 3641 /* 3642 * free each asoc if it is not already closed/free. we can't use the 3643 * macro here since le_next will get freed as part of the 3644 * sctp_free_assoc() call. 3645 */ 3646 #ifdef IPSEC 3647 ipsec_delete_pcbpolicy(ip_pcb); 3648 #endif 3649 if (ip_pcb->inp_options) { 3650 (void)sctp_m_free(ip_pcb->inp_options); 3651 ip_pcb->inp_options = 0; 3652 } 3653 #ifdef INET6 3654 if (ip_pcb->inp_vflag & INP_IPV6) { 3655 struct in6pcb *in6p; 3656 3657 in6p = (struct in6pcb *)inp; 3658 ip6_freepcbopts(in6p->in6p_outputopts); 3659 } 3660 #endif /* INET6 */ 3661 ip_pcb->inp_vflag = 0; 3662 /* free up authentication fields */ 3663 if (inp->sctp_ep.local_auth_chunks != NULL) 3664 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3665 if (inp->sctp_ep.local_hmacs != NULL) 3666 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3667 3668 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3669 LIST_REMOVE(shared_key, next); 3670 sctp_free_sharedkey(shared_key); 3671 /* sa_ignore FREED_MEMORY */ 3672 } 3673 3674 /* 3675 * if we have an address list the following will free the list of 3676 * ifaddr's that are set into this ep. Again macro limitations here, 3677 * since the LIST_FOREACH could be a bad idea. 3678 */ 3679 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3680 sctp_remove_laddr(laddr); 3681 } 3682 3683 #ifdef SCTP_TRACK_FREED_ASOCS 3684 /* TEMP CODE */ 3685 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3686 LIST_REMOVE(asoc, sctp_tcblist); 3687 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3688 SCTP_DECR_ASOC_COUNT(); 3689 } 3690 /* *** END TEMP CODE *** */ 3691 #endif 3692 /* Now lets see about freeing the EP hash table. */ 3693 if (inp->sctp_tcbhash != NULL) { 3694 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3695 inp->sctp_tcbhash = NULL; 3696 } 3697 /* Now we must put the ep memory back into the zone pool */ 3698 crfree(inp->ip_inp.inp.inp_cred); 3699 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3700 SCTP_INP_LOCK_DESTROY(inp); 3701 SCTP_INP_READ_DESTROY(inp); 3702 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3703 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3704 SCTP_DECR_EP_COUNT(); 3705 } 3706 3707 3708 struct sctp_nets * 3709 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3710 { 3711 struct sctp_nets *net; 3712 3713 /* locate the address */ 3714 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3715 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3716 return (net); 3717 } 3718 return (NULL); 3719 } 3720 3721 3722 int 3723 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3724 { 3725 struct sctp_ifa *sctp_ifa; 3726 3727 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3728 if (sctp_ifa) { 3729 return (1); 3730 } else { 3731 return (0); 3732 } 3733 } 3734 3735 /* 3736 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3737 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3738 * stats of stuff. 3739 */ 3740 int 3741 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3742 struct sctp_nets **netp, int set_scope, int from) 3743 { 3744 /* 3745 * The following is redundant to the same lines in the 3746 * sctp_aloc_assoc() but is needed since others call the add address 3747 * function 3748 */ 3749 struct sctp_nets *net, *netfirst; 3750 int addr_inscope; 3751 3752 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3753 from); 3754 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3755 3756 netfirst = sctp_findnet(stcb, newaddr); 3757 if (netfirst) { 3758 /* 3759 * Lie and return ok, we don't want to make the association 3760 * go away for this behavior. It will happen in the TCP 3761 * model in a connected socket. It does not reach the hash 3762 * table until after the association is built so it can't be 3763 * found. Mark as reachable, since the initial creation will 3764 * have been cleared and the NOT_IN_ASSOC flag will have 3765 * been added... and we don't want to end up removing it 3766 * back out. 3767 */ 3768 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3769 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3770 SCTP_ADDR_UNCONFIRMED); 3771 } else { 3772 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3773 } 3774 3775 return (0); 3776 } 3777 addr_inscope = 1; 3778 switch (newaddr->sa_family) { 3779 #ifdef INET 3780 case AF_INET: 3781 { 3782 struct sockaddr_in *sin; 3783 3784 sin = (struct sockaddr_in *)newaddr; 3785 if (sin->sin_addr.s_addr == 0) { 3786 /* Invalid address */ 3787 return (-1); 3788 } 3789 /* zero out the bzero area */ 3790 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3791 3792 /* assure len is set */ 3793 sin->sin_len = sizeof(struct sockaddr_in); 3794 if (set_scope) { 3795 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3796 stcb->asoc.scope.ipv4_local_scope = 1; 3797 } 3798 } else { 3799 /* Validate the address is in scope */ 3800 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3801 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3802 addr_inscope = 0; 3803 } 3804 } 3805 break; 3806 } 3807 #endif 3808 #ifdef INET6 3809 case AF_INET6: 3810 { 3811 struct sockaddr_in6 *sin6; 3812 3813 sin6 = (struct sockaddr_in6 *)newaddr; 3814 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3815 /* Invalid address */ 3816 return (-1); 3817 } 3818 /* assure len is set */ 3819 sin6->sin6_len = sizeof(struct sockaddr_in6); 3820 if (set_scope) { 3821 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3822 stcb->asoc.scope.loopback_scope = 1; 3823 stcb->asoc.scope.local_scope = 0; 3824 stcb->asoc.scope.ipv4_local_scope = 1; 3825 stcb->asoc.scope.site_scope = 1; 3826 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3827 /* 3828 * If the new destination is a 3829 * LINK_LOCAL we must have common 3830 * site scope. Don't set the local 3831 * scope since we may not share all 3832 * links, only loopback can do this. 3833 * Links on the local network would 3834 * also be on our private network 3835 * for v4 too. 3836 */ 3837 stcb->asoc.scope.ipv4_local_scope = 1; 3838 stcb->asoc.scope.site_scope = 1; 3839 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3840 /* 3841 * If the new destination is 3842 * SITE_LOCAL then we must have site 3843 * scope in common. 3844 */ 3845 stcb->asoc.scope.site_scope = 1; 3846 } 3847 } else { 3848 /* Validate the address is in scope */ 3849 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3850 (stcb->asoc.scope.loopback_scope == 0)) { 3851 addr_inscope = 0; 3852 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3853 (stcb->asoc.scope.local_scope == 0)) { 3854 addr_inscope = 0; 3855 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3856 (stcb->asoc.scope.site_scope == 0)) { 3857 addr_inscope = 0; 3858 } 3859 } 3860 break; 3861 } 3862 #endif 3863 default: 3864 /* not supported family type */ 3865 return (-1); 3866 } 3867 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3868 if (net == NULL) { 3869 return (-1); 3870 } 3871 SCTP_INCR_RADDR_COUNT(); 3872 bzero(net, sizeof(struct sctp_nets)); 3873 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3874 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3875 switch (newaddr->sa_family) { 3876 #ifdef INET 3877 case AF_INET: 3878 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3879 break; 3880 #endif 3881 #ifdef INET6 3882 case AF_INET6: 3883 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3884 break; 3885 #endif 3886 default: 3887 break; 3888 } 3889 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3890 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3891 stcb->asoc.scope.loopback_scope = 1; 3892 stcb->asoc.scope.ipv4_local_scope = 1; 3893 stcb->asoc.scope.local_scope = 0; 3894 stcb->asoc.scope.site_scope = 1; 3895 addr_inscope = 1; 3896 } 3897 net->failure_threshold = stcb->asoc.def_net_failure; 3898 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3899 if (addr_inscope == 0) { 3900 net->dest_state = (SCTP_ADDR_REACHABLE | 3901 SCTP_ADDR_OUT_OF_SCOPE); 3902 } else { 3903 if (from == SCTP_ADDR_IS_CONFIRMED) 3904 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3905 net->dest_state = SCTP_ADDR_REACHABLE; 3906 else 3907 net->dest_state = SCTP_ADDR_REACHABLE | 3908 SCTP_ADDR_UNCONFIRMED; 3909 } 3910 /* 3911 * We set this to 0, the timer code knows that this means its an 3912 * initial value 3913 */ 3914 net->rto_needed = 1; 3915 net->RTO = 0; 3916 net->RTO_measured = 0; 3917 stcb->asoc.numnets++; 3918 net->ref_count = 1; 3919 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3920 net->port = stcb->asoc.port; 3921 net->dscp = stcb->asoc.default_dscp; 3922 #ifdef INET6 3923 net->flowlabel = stcb->asoc.default_flowlabel; 3924 #endif 3925 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3926 net->dest_state |= SCTP_ADDR_NOHB; 3927 } else { 3928 net->dest_state &= ~SCTP_ADDR_NOHB; 3929 } 3930 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3931 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3932 } else { 3933 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3934 } 3935 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3936 /* Init the timer structure */ 3937 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3938 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3939 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3940 3941 /* Now generate a route for this guy */ 3942 #ifdef INET6 3943 /* KAME hack: embed scopeid */ 3944 if (newaddr->sa_family == AF_INET6) { 3945 struct sockaddr_in6 *sin6; 3946 3947 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3948 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3949 sin6->sin6_scope_id = 0; 3950 } 3951 #endif 3952 SCTP_RTALLOC((sctp_route_t *) & net->ro, 3953 stcb->asoc.vrf_id, 3954 stcb->sctp_ep->fibnum); 3955 3956 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3957 /* Get source address */ 3958 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3959 stcb, 3960 (sctp_route_t *) & net->ro, 3961 net, 3962 0, 3963 stcb->asoc.vrf_id); 3964 if (net->ro._s_addr != NULL) { 3965 net->src_addr_selected = 1; 3966 /* Now get the interface MTU */ 3967 if (net->ro._s_addr->ifn_p != NULL) { 3968 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3969 } 3970 } else { 3971 net->src_addr_selected = 0; 3972 } 3973 if (net->mtu > 0) { 3974 uint32_t rmtu; 3975 3976 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3977 if (rmtu == 0) { 3978 /* 3979 * Start things off to match mtu of 3980 * interface please. 3981 */ 3982 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3983 net->ro.ro_rt, net->mtu); 3984 } else { 3985 /* 3986 * we take the route mtu over the interface, 3987 * since the route may be leading out the 3988 * loopback, or a different interface. 3989 */ 3990 net->mtu = rmtu; 3991 } 3992 } 3993 } else { 3994 net->src_addr_selected = 0; 3995 } 3996 if (net->mtu == 0) { 3997 switch (newaddr->sa_family) { 3998 #ifdef INET 3999 case AF_INET: 4000 net->mtu = SCTP_DEFAULT_MTU; 4001 break; 4002 #endif 4003 #ifdef INET6 4004 case AF_INET6: 4005 net->mtu = 1280; 4006 break; 4007 #endif 4008 default: 4009 break; 4010 } 4011 } 4012 #if defined(INET) || defined(INET6) 4013 if (net->port) { 4014 net->mtu -= (uint32_t) sizeof(struct udphdr); 4015 } 4016 #endif 4017 if (from == SCTP_ALLOC_ASOC) { 4018 stcb->asoc.smallest_mtu = net->mtu; 4019 } 4020 if (stcb->asoc.smallest_mtu > net->mtu) { 4021 stcb->asoc.smallest_mtu = net->mtu; 4022 } 4023 #ifdef INET6 4024 if (newaddr->sa_family == AF_INET6) { 4025 struct sockaddr_in6 *sin6; 4026 4027 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4028 (void)sa6_recoverscope(sin6); 4029 } 4030 #endif 4031 4032 /* JRS - Use the congestion control given in the CC module */ 4033 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4034 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4035 4036 /* 4037 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4038 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4039 */ 4040 net->find_pseudo_cumack = 1; 4041 net->find_rtx_pseudo_cumack = 1; 4042 /* Choose an initial flowid. */ 4043 net->flowid = stcb->asoc.my_vtag ^ 4044 ntohs(stcb->rport) ^ 4045 ntohs(stcb->sctp_ep->sctp_lport); 4046 net->flowtype = M_HASHTYPE_OPAQUE; 4047 if (netp) { 4048 *netp = net; 4049 } 4050 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4051 if (net->ro.ro_rt == NULL) { 4052 /* Since we have no route put it at the back */ 4053 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4054 } else if (netfirst == NULL) { 4055 /* We are the first one in the pool. */ 4056 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4057 } else if (netfirst->ro.ro_rt == NULL) { 4058 /* 4059 * First one has NO route. Place this one ahead of the first 4060 * one. 4061 */ 4062 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4063 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4064 /* 4065 * This one has a different interface than the one at the 4066 * top of the list. Place it ahead. 4067 */ 4068 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4069 } else { 4070 /* 4071 * Ok we have the same interface as the first one. Move 4072 * forward until we find either a) one with a NULL route... 4073 * insert ahead of that b) one with a different ifp.. insert 4074 * after that. c) end of the list.. insert at the tail. 4075 */ 4076 struct sctp_nets *netlook; 4077 4078 do { 4079 netlook = TAILQ_NEXT(netfirst, sctp_next); 4080 if (netlook == NULL) { 4081 /* End of the list */ 4082 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4083 break; 4084 } else if (netlook->ro.ro_rt == NULL) { 4085 /* next one has NO route */ 4086 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4087 break; 4088 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4089 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4090 net, sctp_next); 4091 break; 4092 } 4093 /* Shift forward */ 4094 netfirst = netlook; 4095 } while (netlook != NULL); 4096 } 4097 4098 /* got to have a primary set */ 4099 if (stcb->asoc.primary_destination == 0) { 4100 stcb->asoc.primary_destination = net; 4101 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4102 (net->ro.ro_rt) && 4103 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4104 /* No route to current primary adopt new primary */ 4105 stcb->asoc.primary_destination = net; 4106 } 4107 /* Validate primary is first */ 4108 net = TAILQ_FIRST(&stcb->asoc.nets); 4109 if ((net != stcb->asoc.primary_destination) && 4110 (stcb->asoc.primary_destination)) { 4111 /* 4112 * first one on the list is NOT the primary sctp_cmpaddr() 4113 * is much more efficient if the primary is the first on the 4114 * list, make it so. 4115 */ 4116 TAILQ_REMOVE(&stcb->asoc.nets, 4117 stcb->asoc.primary_destination, sctp_next); 4118 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4119 stcb->asoc.primary_destination, sctp_next); 4120 } 4121 return (0); 4122 } 4123 4124 4125 static uint32_t 4126 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4127 { 4128 uint32_t id; 4129 struct sctpasochead *head; 4130 struct sctp_tcb *lstcb; 4131 4132 SCTP_INP_WLOCK(inp); 4133 try_again: 4134 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4135 /* TSNH */ 4136 SCTP_INP_WUNLOCK(inp); 4137 return (0); 4138 } 4139 /* 4140 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4141 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4142 */ 4143 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4144 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4145 } 4146 id = inp->sctp_associd_counter; 4147 inp->sctp_associd_counter++; 4148 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4149 if (lstcb) { 4150 goto try_again; 4151 } 4152 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4153 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4154 stcb->asoc.in_asocid_hash = 1; 4155 SCTP_INP_WUNLOCK(inp); 4156 return id; 4157 } 4158 4159 /* 4160 * allocate an association and add it to the endpoint. The caller must be 4161 * careful to add all additional addresses once they are know right away or 4162 * else the assoc will be may experience a blackout scenario. 4163 */ 4164 struct sctp_tcb * 4165 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4166 int *error, uint32_t override_tag, uint32_t vrf_id, 4167 uint16_t o_streams, 4168 struct thread *p 4169 ) 4170 { 4171 /* note the p argument is only valid in unbound sockets */ 4172 4173 struct sctp_tcb *stcb; 4174 struct sctp_association *asoc; 4175 struct sctpasochead *head; 4176 uint16_t rport; 4177 int err; 4178 4179 /* 4180 * Assumption made here: Caller has done a 4181 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4182 * address does not exist already. 4183 */ 4184 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4185 /* Hit max assoc, sorry no more */ 4186 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4187 *error = ENOBUFS; 4188 return (NULL); 4189 } 4190 if (firstaddr == NULL) { 4191 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4192 *error = EINVAL; 4193 return (NULL); 4194 } 4195 SCTP_INP_RLOCK(inp); 4196 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4197 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4198 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4199 /* 4200 * If its in the TCP pool, its NOT allowed to create an 4201 * association. The parent listener needs to call 4202 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4203 * off, or connected one does this.. its an error. 4204 */ 4205 SCTP_INP_RUNLOCK(inp); 4206 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4207 *error = EINVAL; 4208 return (NULL); 4209 } 4210 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4211 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4212 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4213 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4214 SCTP_INP_RUNLOCK(inp); 4215 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4216 *error = EINVAL; 4217 return (NULL); 4218 } 4219 } 4220 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4221 #ifdef SCTP_DEBUG 4222 if (firstaddr) { 4223 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4224 switch (firstaddr->sa_family) { 4225 #ifdef INET 4226 case AF_INET: 4227 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4228 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4229 break; 4230 #endif 4231 #ifdef INET6 4232 case AF_INET6: 4233 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4234 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4235 break; 4236 #endif 4237 default: 4238 break; 4239 } 4240 } else { 4241 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4242 } 4243 #endif /* SCTP_DEBUG */ 4244 switch (firstaddr->sa_family) { 4245 #ifdef INET 4246 case AF_INET: 4247 { 4248 struct sockaddr_in *sin; 4249 4250 sin = (struct sockaddr_in *)firstaddr; 4251 if ((ntohs(sin->sin_port) == 0) || 4252 (sin->sin_addr.s_addr == INADDR_ANY) || 4253 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4254 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4255 /* Invalid address */ 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 rport = sin->sin_port; 4262 break; 4263 } 4264 #endif 4265 #ifdef INET6 4266 case AF_INET6: 4267 { 4268 struct sockaddr_in6 *sin6; 4269 4270 sin6 = (struct sockaddr_in6 *)firstaddr; 4271 if ((ntohs(sin6->sin6_port) == 0) || 4272 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4273 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4274 /* Invalid address */ 4275 SCTP_INP_RUNLOCK(inp); 4276 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4277 *error = EINVAL; 4278 return (NULL); 4279 } 4280 rport = sin6->sin6_port; 4281 break; 4282 } 4283 #endif 4284 default: 4285 /* not supported family type */ 4286 SCTP_INP_RUNLOCK(inp); 4287 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4288 *error = EINVAL; 4289 return (NULL); 4290 } 4291 SCTP_INP_RUNLOCK(inp); 4292 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4293 /* 4294 * If you have not performed a bind, then we need to do the 4295 * ephemeral bind for you. 4296 */ 4297 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4298 (struct sockaddr *)NULL, 4299 (struct sctp_ifa *)NULL, 4300 p 4301 ))) { 4302 /* bind error, probably perm */ 4303 *error = err; 4304 return (NULL); 4305 } 4306 } 4307 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4308 if (stcb == NULL) { 4309 /* out of memory? */ 4310 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4311 *error = ENOMEM; 4312 return (NULL); 4313 } 4314 SCTP_INCR_ASOC_COUNT(); 4315 4316 bzero(stcb, sizeof(*stcb)); 4317 asoc = &stcb->asoc; 4318 4319 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4320 SCTP_TCB_LOCK_INIT(stcb); 4321 SCTP_TCB_SEND_LOCK_INIT(stcb); 4322 stcb->rport = rport; 4323 /* setup back pointer's */ 4324 stcb->sctp_ep = inp; 4325 stcb->sctp_socket = inp->sctp_socket; 4326 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4327 /* failed */ 4328 SCTP_TCB_LOCK_DESTROY(stcb); 4329 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4330 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4331 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4332 SCTP_DECR_ASOC_COUNT(); 4333 *error = err; 4334 return (NULL); 4335 } 4336 /* and the port */ 4337 SCTP_INP_INFO_WLOCK(); 4338 SCTP_INP_WLOCK(inp); 4339 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4340 /* inpcb freed while alloc going on */ 4341 SCTP_TCB_LOCK_DESTROY(stcb); 4342 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4343 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4344 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4345 SCTP_INP_WUNLOCK(inp); 4346 SCTP_INP_INFO_WUNLOCK(); 4347 SCTP_DECR_ASOC_COUNT(); 4348 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4349 *error = EINVAL; 4350 return (NULL); 4351 } 4352 SCTP_TCB_LOCK(stcb); 4353 4354 /* now that my_vtag is set, add it to the hash */ 4355 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4356 /* put it in the bucket in the vtag hash of assoc's for the system */ 4357 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4358 SCTP_INP_INFO_WUNLOCK(); 4359 4360 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4361 /* failure.. memory error? */ 4362 if (asoc->strmout) { 4363 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4364 asoc->strmout = NULL; 4365 } 4366 if (asoc->mapping_array) { 4367 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4368 asoc->mapping_array = NULL; 4369 } 4370 if (asoc->nr_mapping_array) { 4371 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4372 asoc->nr_mapping_array = NULL; 4373 } 4374 SCTP_DECR_ASOC_COUNT(); 4375 SCTP_TCB_UNLOCK(stcb); 4376 SCTP_TCB_LOCK_DESTROY(stcb); 4377 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4378 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4379 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4380 SCTP_INP_WUNLOCK(inp); 4381 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4382 *error = ENOBUFS; 4383 return (NULL); 4384 } 4385 /* Init all the timers */ 4386 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4387 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4388 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4389 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4390 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4391 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4392 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4393 4394 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4395 /* now file the port under the hash as well */ 4396 if (inp->sctp_tcbhash != NULL) { 4397 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4398 inp->sctp_hashmark)]; 4399 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4400 } 4401 SCTP_INP_WUNLOCK(inp); 4402 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4403 return (stcb); 4404 } 4405 4406 4407 void 4408 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4409 { 4410 struct sctp_association *asoc; 4411 4412 asoc = &stcb->asoc; 4413 asoc->numnets--; 4414 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4415 if (net == asoc->primary_destination) { 4416 /* Reset primary */ 4417 struct sctp_nets *lnet; 4418 4419 lnet = TAILQ_FIRST(&asoc->nets); 4420 /* 4421 * Mobility adaptation Ideally, if deleted destination is 4422 * the primary, it becomes a fast retransmission trigger by 4423 * the subsequent SET PRIMARY. (by micchie) 4424 */ 4425 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4426 SCTP_MOBILITY_BASE) || 4427 sctp_is_mobility_feature_on(stcb->sctp_ep, 4428 SCTP_MOBILITY_FASTHANDOFF)) { 4429 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4430 if (asoc->deleted_primary != NULL) { 4431 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4432 goto out; 4433 } 4434 asoc->deleted_primary = net; 4435 atomic_add_int(&net->ref_count, 1); 4436 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4437 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4438 sctp_mobility_feature_on(stcb->sctp_ep, 4439 SCTP_MOBILITY_PRIM_DELETED); 4440 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4441 stcb->sctp_ep, stcb, NULL); 4442 } 4443 out: 4444 /* Try to find a confirmed primary */ 4445 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4446 } 4447 if (net == asoc->last_data_chunk_from) { 4448 /* Reset primary */ 4449 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4450 } 4451 if (net == asoc->last_control_chunk_from) { 4452 /* Clear net */ 4453 asoc->last_control_chunk_from = NULL; 4454 } 4455 if (net == stcb->asoc.alternate) { 4456 sctp_free_remote_addr(stcb->asoc.alternate); 4457 stcb->asoc.alternate = NULL; 4458 } 4459 sctp_free_remote_addr(net); 4460 } 4461 4462 /* 4463 * remove a remote endpoint address from an association, it will fail if the 4464 * address does not exist. 4465 */ 4466 int 4467 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4468 { 4469 /* 4470 * Here we need to remove a remote address. This is quite simple, we 4471 * first find it in the list of address for the association 4472 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4473 * on that item. Note we do not allow it to be removed if there are 4474 * no other addresses. 4475 */ 4476 struct sctp_association *asoc; 4477 struct sctp_nets *net, *nnet; 4478 4479 asoc = &stcb->asoc; 4480 4481 /* locate the address */ 4482 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4483 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4484 continue; 4485 } 4486 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4487 remaddr)) { 4488 /* we found the guy */ 4489 if (asoc->numnets < 2) { 4490 /* Must have at LEAST two remote addresses */ 4491 return (-1); 4492 } else { 4493 sctp_remove_net(stcb, net); 4494 return (0); 4495 } 4496 } 4497 } 4498 /* not found. */ 4499 return (-2); 4500 } 4501 4502 void 4503 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4504 { 4505 struct sctpvtaghead *chain; 4506 struct sctp_tagblock *twait_block; 4507 int found = 0; 4508 int i; 4509 4510 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4511 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4512 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4513 if ((twait_block->vtag_block[i].v_tag == tag) && 4514 (twait_block->vtag_block[i].lport == lport) && 4515 (twait_block->vtag_block[i].rport == rport)) { 4516 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4517 twait_block->vtag_block[i].v_tag = 0; 4518 twait_block->vtag_block[i].lport = 0; 4519 twait_block->vtag_block[i].rport = 0; 4520 found = 1; 4521 break; 4522 } 4523 } 4524 if (found) 4525 break; 4526 } 4527 } 4528 4529 int 4530 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4531 { 4532 struct sctpvtaghead *chain; 4533 struct sctp_tagblock *twait_block; 4534 int found = 0; 4535 int i; 4536 4537 SCTP_INP_INFO_WLOCK(); 4538 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4539 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4540 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4541 if ((twait_block->vtag_block[i].v_tag == tag) && 4542 (twait_block->vtag_block[i].lport == lport) && 4543 (twait_block->vtag_block[i].rport == rport)) { 4544 found = 1; 4545 break; 4546 } 4547 } 4548 if (found) 4549 break; 4550 } 4551 SCTP_INP_INFO_WUNLOCK(); 4552 return (found); 4553 } 4554 4555 4556 void 4557 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4558 { 4559 struct sctpvtaghead *chain; 4560 struct sctp_tagblock *twait_block; 4561 struct timeval now; 4562 int set, i; 4563 4564 if (time == 0) { 4565 /* Its disabled */ 4566 return; 4567 } 4568 (void)SCTP_GETTIME_TIMEVAL(&now); 4569 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4570 set = 0; 4571 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4572 /* Block(s) present, lets find space, and expire on the fly */ 4573 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4574 if ((twait_block->vtag_block[i].v_tag == 0) && 4575 !set) { 4576 twait_block->vtag_block[i].tv_sec_at_expire = 4577 now.tv_sec + time; 4578 twait_block->vtag_block[i].v_tag = tag; 4579 twait_block->vtag_block[i].lport = lport; 4580 twait_block->vtag_block[i].rport = rport; 4581 set = 1; 4582 } else if ((twait_block->vtag_block[i].v_tag) && 4583 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4584 /* Audit expires this guy */ 4585 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4586 twait_block->vtag_block[i].v_tag = 0; 4587 twait_block->vtag_block[i].lport = 0; 4588 twait_block->vtag_block[i].rport = 0; 4589 if (set == 0) { 4590 /* Reuse it for my new tag */ 4591 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4592 twait_block->vtag_block[i].v_tag = tag; 4593 twait_block->vtag_block[i].lport = lport; 4594 twait_block->vtag_block[i].rport = rport; 4595 set = 1; 4596 } 4597 } 4598 } 4599 if (set) { 4600 /* 4601 * We only do up to the block where we can place our 4602 * tag for audits 4603 */ 4604 break; 4605 } 4606 } 4607 /* Need to add a new block to chain */ 4608 if (!set) { 4609 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4610 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4611 if (twait_block == NULL) { 4612 #ifdef INVARIANTS 4613 panic("Can not alloc tagblock"); 4614 #endif 4615 return; 4616 } 4617 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4618 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4619 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4620 twait_block->vtag_block[0].v_tag = tag; 4621 twait_block->vtag_block[0].lport = lport; 4622 twait_block->vtag_block[0].rport = rport; 4623 } 4624 } 4625 4626 4627 4628 /*- 4629 * Free the association after un-hashing the remote port. This 4630 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4631 * expect that the input to this function IS a locked TCB. 4632 * It will return 0, if it did NOT destroy the association (instead 4633 * it unlocks it. It will return NON-zero if it either destroyed the 4634 * association OR the association is already destroyed. 4635 */ 4636 int 4637 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4638 { 4639 int i; 4640 struct sctp_association *asoc; 4641 struct sctp_nets *net, *nnet; 4642 struct sctp_laddr *laddr, *naddr; 4643 struct sctp_tmit_chunk *chk, *nchk; 4644 struct sctp_asconf_addr *aparam, *naparam; 4645 struct sctp_asconf_ack *aack, *naack; 4646 struct sctp_stream_reset_list *strrst, *nstrrst; 4647 struct sctp_queued_to_read *sq, *nsq; 4648 struct sctp_stream_queue_pending *sp, *nsp; 4649 sctp_sharedkey_t *shared_key, *nshared_key; 4650 struct socket *so; 4651 4652 /* first, lets purge the entry from the hash table. */ 4653 4654 #ifdef SCTP_LOG_CLOSING 4655 sctp_log_closing(inp, stcb, 6); 4656 #endif 4657 if (stcb->asoc.state == 0) { 4658 #ifdef SCTP_LOG_CLOSING 4659 sctp_log_closing(inp, NULL, 7); 4660 #endif 4661 /* there is no asoc, really TSNH :-0 */ 4662 return (1); 4663 } 4664 if (stcb->asoc.alternate) { 4665 sctp_free_remote_addr(stcb->asoc.alternate); 4666 stcb->asoc.alternate = NULL; 4667 } 4668 /* TEMP CODE */ 4669 if (stcb->freed_from_where == 0) { 4670 /* Only record the first place free happened from */ 4671 stcb->freed_from_where = from_location; 4672 } 4673 /* TEMP CODE */ 4674 4675 asoc = &stcb->asoc; 4676 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4677 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4678 /* nothing around */ 4679 so = NULL; 4680 else 4681 so = inp->sctp_socket; 4682 4683 /* 4684 * We used timer based freeing if a reader or writer is in the way. 4685 * So we first check if we are actually being called from a timer, 4686 * if so we abort early if a reader or writer is still in the way. 4687 */ 4688 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4689 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4690 /* 4691 * is it the timer driving us? if so are the reader/writers 4692 * gone? 4693 */ 4694 if (stcb->asoc.refcnt) { 4695 /* nope, reader or writer in the way */ 4696 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4697 /* no asoc destroyed */ 4698 SCTP_TCB_UNLOCK(stcb); 4699 #ifdef SCTP_LOG_CLOSING 4700 sctp_log_closing(inp, stcb, 8); 4701 #endif 4702 return (0); 4703 } 4704 } 4705 /* now clean up any other timers */ 4706 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4707 asoc->dack_timer.self = NULL; 4708 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4709 /*- 4710 * For stream reset we don't blast this unless 4711 * it is a str-reset timer, it might be the 4712 * free-asoc timer which we DON'T want to 4713 * disturb. 4714 */ 4715 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4716 asoc->strreset_timer.self = NULL; 4717 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4718 asoc->asconf_timer.self = NULL; 4719 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4720 asoc->autoclose_timer.self = NULL; 4721 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4722 asoc->shut_guard_timer.self = NULL; 4723 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4724 asoc->delayed_event_timer.self = NULL; 4725 /* Mobility adaptation */ 4726 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4727 asoc->delete_prim_timer.self = NULL; 4728 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4729 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4730 net->rxt_timer.self = NULL; 4731 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4732 net->pmtu_timer.self = NULL; 4733 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4734 net->hb_timer.self = NULL; 4735 } 4736 /* Now the read queue needs to be cleaned up (only once) */ 4737 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4738 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4739 SCTP_INP_READ_LOCK(inp); 4740 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4741 if (sq->stcb == stcb) { 4742 sq->do_not_ref_stcb = 1; 4743 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4744 /* 4745 * If there is no end, there never will be 4746 * now. 4747 */ 4748 if (sq->end_added == 0) { 4749 /* Held for PD-API clear that. */ 4750 sq->pdapi_aborted = 1; 4751 sq->held_length = 0; 4752 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4753 /* 4754 * Need to add a PD-API 4755 * aborted indication. 4756 * Setting the control_pdapi 4757 * assures that it will be 4758 * added right after this 4759 * msg. 4760 */ 4761 uint32_t strseq; 4762 4763 stcb->asoc.control_pdapi = sq; 4764 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4765 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4766 stcb, 4767 SCTP_PARTIAL_DELIVERY_ABORTED, 4768 (void *)&strseq, 4769 SCTP_SO_LOCKED); 4770 stcb->asoc.control_pdapi = NULL; 4771 } 4772 } 4773 /* Add an end to wake them */ 4774 sq->end_added = 1; 4775 } 4776 } 4777 SCTP_INP_READ_UNLOCK(inp); 4778 if (stcb->block_entry) { 4779 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4780 stcb->block_entry->error = ECONNRESET; 4781 stcb->block_entry = NULL; 4782 } 4783 } 4784 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4785 /* 4786 * Someone holds a reference OR the socket is unaccepted 4787 * yet. 4788 */ 4789 if ((stcb->asoc.refcnt) || 4790 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4791 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4792 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4793 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4794 } 4795 SCTP_TCB_UNLOCK(stcb); 4796 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4797 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4798 /* nothing around */ 4799 so = NULL; 4800 if (so) { 4801 /* Wake any reader/writers */ 4802 sctp_sorwakeup(inp, so); 4803 sctp_sowwakeup(inp, so); 4804 } 4805 #ifdef SCTP_LOG_CLOSING 4806 sctp_log_closing(inp, stcb, 9); 4807 #endif 4808 /* no asoc destroyed */ 4809 return (0); 4810 } 4811 #ifdef SCTP_LOG_CLOSING 4812 sctp_log_closing(inp, stcb, 10); 4813 #endif 4814 /* 4815 * When I reach here, no others want to kill the assoc yet.. and I 4816 * own the lock. Now its possible an abort comes in when I do the 4817 * lock exchange below to grab all the locks to do the final take 4818 * out. to prevent this we increment the count, which will start a 4819 * timer and blow out above thus assuring us that we hold exclusive 4820 * killing of the asoc. Note that after getting back the TCB lock we 4821 * will go ahead and increment the counter back up and stop any 4822 * timer a passing stranger may have started :-S 4823 */ 4824 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4825 atomic_add_int(&stcb->asoc.refcnt, 1); 4826 4827 SCTP_TCB_UNLOCK(stcb); 4828 SCTP_INP_INFO_WLOCK(); 4829 SCTP_INP_WLOCK(inp); 4830 SCTP_TCB_LOCK(stcb); 4831 } 4832 /* Double check the GONE flag */ 4833 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4834 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4835 /* nothing around */ 4836 so = NULL; 4837 4838 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4839 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4840 /* 4841 * For TCP type we need special handling when we are 4842 * connected. We also include the peel'ed off ones to. 4843 */ 4844 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4845 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4846 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4847 if (so) { 4848 SOCK_LOCK(so); 4849 if (so->so_rcv.sb_cc == 0) { 4850 so->so_state &= ~(SS_ISCONNECTING | 4851 SS_ISDISCONNECTING | 4852 SS_ISCONFIRMING | 4853 SS_ISCONNECTED); 4854 } 4855 socantrcvmore_locked(so); 4856 sctp_sowwakeup(inp, so); 4857 sctp_sorwakeup(inp, so); 4858 SCTP_SOWAKEUP(so); 4859 } 4860 } 4861 } 4862 /* 4863 * Make it invalid too, that way if its about to run it will abort 4864 * and return. 4865 */ 4866 /* re-increment the lock */ 4867 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4868 atomic_add_int(&stcb->asoc.refcnt, -1); 4869 } 4870 if (stcb->asoc.refcnt) { 4871 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4872 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4873 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4874 SCTP_INP_INFO_WUNLOCK(); 4875 SCTP_INP_WUNLOCK(inp); 4876 } 4877 SCTP_TCB_UNLOCK(stcb); 4878 return (0); 4879 } 4880 asoc->state = 0; 4881 if (inp->sctp_tcbhash) { 4882 LIST_REMOVE(stcb, sctp_tcbhash); 4883 } 4884 if (stcb->asoc.in_asocid_hash) { 4885 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4886 } 4887 /* Now lets remove it from the list of ALL associations in the EP */ 4888 LIST_REMOVE(stcb, sctp_tcblist); 4889 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4890 SCTP_INP_INCR_REF(inp); 4891 SCTP_INP_WUNLOCK(inp); 4892 } 4893 /* pull from vtag hash */ 4894 LIST_REMOVE(stcb, sctp_asocs); 4895 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4896 inp->sctp_lport, stcb->rport); 4897 4898 /* 4899 * Now restop the timers to be sure this is paranoia at is finest! 4900 */ 4901 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4902 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4903 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4904 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4905 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4906 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4907 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4908 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4909 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4910 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4911 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4912 } 4913 4914 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4915 /* 4916 * The chunk lists and such SHOULD be empty but we check them just 4917 * in case. 4918 */ 4919 /* anything on the wheel needs to be removed */ 4920 for (i = 0; i < asoc->streamoutcnt; i++) { 4921 struct sctp_stream_out *outs; 4922 4923 outs = &asoc->strmout[i]; 4924 /* now clean up any chunks here */ 4925 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4926 TAILQ_REMOVE(&outs->outqueue, sp, next); 4927 sctp_free_spbufspace(stcb, asoc, sp); 4928 if (sp->data) { 4929 if (so) { 4930 /* Still an open socket - report */ 4931 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4932 0, (void *)sp, SCTP_SO_LOCKED); 4933 } 4934 if (sp->data) { 4935 sctp_m_freem(sp->data); 4936 sp->data = NULL; 4937 sp->tail_mbuf = NULL; 4938 sp->length = 0; 4939 } 4940 } 4941 if (sp->net) { 4942 sctp_free_remote_addr(sp->net); 4943 sp->net = NULL; 4944 } 4945 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4946 } 4947 } 4948 /* sa_ignore FREED_MEMORY */ 4949 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4950 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4951 SCTP_FREE(strrst, SCTP_M_STRESET); 4952 } 4953 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4954 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4955 if (sq->data) { 4956 sctp_m_freem(sq->data); 4957 sq->data = NULL; 4958 } 4959 sctp_free_remote_addr(sq->whoFrom); 4960 sq->whoFrom = NULL; 4961 sq->stcb = NULL; 4962 /* Free the ctl entry */ 4963 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4964 SCTP_DECR_READQ_COUNT(); 4965 /* sa_ignore FREED_MEMORY */ 4966 } 4967 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4968 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4969 if (chk->data) { 4970 sctp_m_freem(chk->data); 4971 chk->data = NULL; 4972 } 4973 if (chk->holds_key_ref) 4974 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4975 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4976 SCTP_DECR_CHK_COUNT(); 4977 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4978 asoc->free_chunk_cnt--; 4979 /* sa_ignore FREED_MEMORY */ 4980 } 4981 /* pending send queue SHOULD be empty */ 4982 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4983 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4984 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4985 #ifdef INVARIANTS 4986 } else { 4987 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4988 #endif 4989 } 4990 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4991 if (chk->data) { 4992 if (so) { 4993 /* Still a socket? */ 4994 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4995 0, chk, SCTP_SO_LOCKED); 4996 } 4997 if (chk->data) { 4998 sctp_m_freem(chk->data); 4999 chk->data = NULL; 5000 } 5001 } 5002 if (chk->holds_key_ref) 5003 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5004 if (chk->whoTo) { 5005 sctp_free_remote_addr(chk->whoTo); 5006 chk->whoTo = NULL; 5007 } 5008 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5009 SCTP_DECR_CHK_COUNT(); 5010 /* sa_ignore FREED_MEMORY */ 5011 } 5012 /* sent queue SHOULD be empty */ 5013 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5014 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5015 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5016 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5017 #ifdef INVARIANTS 5018 } else { 5019 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5020 #endif 5021 } 5022 } 5023 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5024 if (chk->data) { 5025 if (so) { 5026 /* Still a socket? */ 5027 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5028 0, chk, SCTP_SO_LOCKED); 5029 } 5030 if (chk->data) { 5031 sctp_m_freem(chk->data); 5032 chk->data = NULL; 5033 } 5034 } 5035 if (chk->holds_key_ref) 5036 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5037 sctp_free_remote_addr(chk->whoTo); 5038 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5039 SCTP_DECR_CHK_COUNT(); 5040 /* sa_ignore FREED_MEMORY */ 5041 } 5042 #ifdef INVARIANTS 5043 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5044 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5045 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5046 } 5047 } 5048 #endif 5049 /* control queue MAY not be empty */ 5050 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5051 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5052 if (chk->data) { 5053 sctp_m_freem(chk->data); 5054 chk->data = NULL; 5055 } 5056 if (chk->holds_key_ref) 5057 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5058 sctp_free_remote_addr(chk->whoTo); 5059 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5060 SCTP_DECR_CHK_COUNT(); 5061 /* sa_ignore FREED_MEMORY */ 5062 } 5063 /* ASCONF queue MAY not be empty */ 5064 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5065 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5066 if (chk->data) { 5067 sctp_m_freem(chk->data); 5068 chk->data = NULL; 5069 } 5070 if (chk->holds_key_ref) 5071 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5072 sctp_free_remote_addr(chk->whoTo); 5073 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5074 SCTP_DECR_CHK_COUNT(); 5075 /* sa_ignore FREED_MEMORY */ 5076 } 5077 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5078 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5079 if (chk->data) { 5080 sctp_m_freem(chk->data); 5081 chk->data = NULL; 5082 } 5083 if (chk->holds_key_ref) 5084 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5085 sctp_free_remote_addr(chk->whoTo); 5086 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5087 SCTP_DECR_CHK_COUNT(); 5088 /* sa_ignore FREED_MEMORY */ 5089 } 5090 5091 if (asoc->mapping_array) { 5092 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5093 asoc->mapping_array = NULL; 5094 } 5095 if (asoc->nr_mapping_array) { 5096 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5097 asoc->nr_mapping_array = NULL; 5098 } 5099 /* the stream outs */ 5100 if (asoc->strmout) { 5101 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5102 asoc->strmout = NULL; 5103 } 5104 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5105 if (asoc->strmin) { 5106 struct sctp_queued_to_read *ctl, *nctl; 5107 5108 for (i = 0; i < asoc->streamincnt; i++) { 5109 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5110 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5111 sctp_free_remote_addr(ctl->whoFrom); 5112 if (ctl->data) { 5113 sctp_m_freem(ctl->data); 5114 ctl->data = NULL; 5115 } 5116 /* 5117 * We don't free the address here since all 5118 * the net's were freed above. 5119 */ 5120 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5121 SCTP_DECR_READQ_COUNT(); 5122 } 5123 } 5124 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5125 asoc->strmin = NULL; 5126 } 5127 asoc->streamincnt = 0; 5128 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5129 #ifdef INVARIANTS 5130 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5131 panic("no net's left alloc'ed, or list points to itself"); 5132 } 5133 #endif 5134 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5135 sctp_free_remote_addr(net); 5136 } 5137 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5138 /* sa_ignore FREED_MEMORY */ 5139 sctp_remove_laddr(laddr); 5140 } 5141 5142 /* pending asconf (address) parameters */ 5143 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5144 /* sa_ignore FREED_MEMORY */ 5145 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5146 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5147 } 5148 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5149 /* sa_ignore FREED_MEMORY */ 5150 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5151 if (aack->data != NULL) { 5152 sctp_m_freem(aack->data); 5153 } 5154 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5155 } 5156 /* clean up auth stuff */ 5157 if (asoc->local_hmacs) 5158 sctp_free_hmaclist(asoc->local_hmacs); 5159 if (asoc->peer_hmacs) 5160 sctp_free_hmaclist(asoc->peer_hmacs); 5161 5162 if (asoc->local_auth_chunks) 5163 sctp_free_chunklist(asoc->local_auth_chunks); 5164 if (asoc->peer_auth_chunks) 5165 sctp_free_chunklist(asoc->peer_auth_chunks); 5166 5167 sctp_free_authinfo(&asoc->authinfo); 5168 5169 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5170 LIST_REMOVE(shared_key, next); 5171 sctp_free_sharedkey(shared_key); 5172 /* sa_ignore FREED_MEMORY */ 5173 } 5174 5175 /* Insert new items here :> */ 5176 5177 /* Get rid of LOCK */ 5178 SCTP_TCB_UNLOCK(stcb); 5179 SCTP_TCB_LOCK_DESTROY(stcb); 5180 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5181 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5182 SCTP_INP_INFO_WUNLOCK(); 5183 SCTP_INP_RLOCK(inp); 5184 } 5185 #ifdef SCTP_TRACK_FREED_ASOCS 5186 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5187 /* now clean up the tasoc itself */ 5188 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5189 SCTP_DECR_ASOC_COUNT(); 5190 } else { 5191 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5192 } 5193 #else 5194 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5195 SCTP_DECR_ASOC_COUNT(); 5196 #endif 5197 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5198 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5199 /* 5200 * If its NOT the inp_free calling us AND sctp_close 5201 * as been called, we call back... 5202 */ 5203 SCTP_INP_RUNLOCK(inp); 5204 /* 5205 * This will start the kill timer (if we are the 5206 * last one) since we hold an increment yet. But 5207 * this is the only safe way to do this since 5208 * otherwise if the socket closes at the same time 5209 * we are here we might collide in the cleanup. 5210 */ 5211 sctp_inpcb_free(inp, 5212 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5213 SCTP_CALLED_DIRECTLY_NOCMPSET); 5214 SCTP_INP_DECR_REF(inp); 5215 goto out_of; 5216 } else { 5217 /* The socket is still open. */ 5218 SCTP_INP_DECR_REF(inp); 5219 } 5220 } 5221 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5222 SCTP_INP_RUNLOCK(inp); 5223 } 5224 out_of: 5225 /* destroyed the asoc */ 5226 #ifdef SCTP_LOG_CLOSING 5227 sctp_log_closing(inp, NULL, 11); 5228 #endif 5229 return (1); 5230 } 5231 5232 5233 5234 /* 5235 * determine if a destination is "reachable" based upon the addresses bound 5236 * to the current endpoint (e.g. only v4 or v6 currently bound) 5237 */ 5238 /* 5239 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5240 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5241 * types bound as its endpoint 5242 */ 5243 int 5244 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5245 { 5246 struct sctp_inpcb *inp; 5247 int answer; 5248 5249 /* 5250 * No locks here, the TCB, in all cases is already locked and an 5251 * assoc is up. There is either a INP lock by the caller applied (in 5252 * asconf case when deleting an address) or NOT in the HB case, 5253 * however if HB then the INP increment is up and the INP will not 5254 * be removed (on top of the fact that we have a TCB lock). So we 5255 * only want to read the sctp_flags, which is either bound-all or 5256 * not.. no protection needed since once an assoc is up you can't be 5257 * changing your binding. 5258 */ 5259 inp = stcb->sctp_ep; 5260 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5261 /* if bound all, destination is not restricted */ 5262 /* 5263 * RRS: Question during lock work: Is this correct? If you 5264 * are bound-all you still might need to obey the V4--V6 5265 * flags??? IMO this bound-all stuff needs to be removed! 5266 */ 5267 return (1); 5268 } 5269 /* NOTE: all "scope" checks are done when local addresses are added */ 5270 switch (destaddr->sa_family) { 5271 #ifdef INET6 5272 case AF_INET6: 5273 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5274 break; 5275 #endif 5276 #ifdef INET 5277 case AF_INET: 5278 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5279 break; 5280 #endif 5281 default: 5282 /* invalid family, so it's unreachable */ 5283 answer = 0; 5284 break; 5285 } 5286 return (answer); 5287 } 5288 5289 /* 5290 * update the inp_vflags on an endpoint 5291 */ 5292 static void 5293 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5294 { 5295 struct sctp_laddr *laddr; 5296 5297 /* first clear the flag */ 5298 inp->ip_inp.inp.inp_vflag = 0; 5299 /* set the flag based on addresses on the ep list */ 5300 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5301 if (laddr->ifa == NULL) { 5302 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5303 __func__); 5304 continue; 5305 } 5306 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5307 continue; 5308 } 5309 switch (laddr->ifa->address.sa.sa_family) { 5310 #ifdef INET6 5311 case AF_INET6: 5312 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5313 break; 5314 #endif 5315 #ifdef INET 5316 case AF_INET: 5317 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5318 break; 5319 #endif 5320 default: 5321 break; 5322 } 5323 } 5324 } 5325 5326 /* 5327 * Add the address to the endpoint local address list There is nothing to be 5328 * done if we are bound to all addresses 5329 */ 5330 void 5331 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5332 { 5333 struct sctp_laddr *laddr; 5334 int fnd, error = 0; 5335 5336 fnd = 0; 5337 5338 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5339 /* You are already bound to all. You have it already */ 5340 return; 5341 } 5342 #ifdef INET6 5343 if (ifa->address.sa.sa_family == AF_INET6) { 5344 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5345 /* Can't bind a non-useable addr. */ 5346 return; 5347 } 5348 } 5349 #endif 5350 /* first, is it already present? */ 5351 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5352 if (laddr->ifa == ifa) { 5353 fnd = 1; 5354 break; 5355 } 5356 } 5357 5358 if (fnd == 0) { 5359 /* Not in the ep list */ 5360 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5361 if (error != 0) 5362 return; 5363 inp->laddr_count++; 5364 /* update inp_vflag flags */ 5365 switch (ifa->address.sa.sa_family) { 5366 #ifdef INET6 5367 case AF_INET6: 5368 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5369 break; 5370 #endif 5371 #ifdef INET 5372 case AF_INET: 5373 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5374 break; 5375 #endif 5376 default: 5377 break; 5378 } 5379 } 5380 return; 5381 } 5382 5383 5384 /* 5385 * select a new (hopefully reachable) destination net (should only be used 5386 * when we deleted an ep addr that is the only usable source address to reach 5387 * the destination net) 5388 */ 5389 static void 5390 sctp_select_primary_destination(struct sctp_tcb *stcb) 5391 { 5392 struct sctp_nets *net; 5393 5394 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5395 /* for now, we'll just pick the first reachable one we find */ 5396 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5397 continue; 5398 if (sctp_destination_is_reachable(stcb, 5399 (struct sockaddr *)&net->ro._l_addr)) { 5400 /* found a reachable destination */ 5401 stcb->asoc.primary_destination = net; 5402 } 5403 } 5404 /* I can't there from here! ...we're gonna die shortly... */ 5405 } 5406 5407 5408 /* 5409 * Delete the address from the endpoint local address list There is nothing 5410 * to be done if we are bound to all addresses 5411 */ 5412 void 5413 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5414 { 5415 struct sctp_laddr *laddr; 5416 int fnd; 5417 5418 fnd = 0; 5419 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5420 /* You are already bound to all. You have it already */ 5421 return; 5422 } 5423 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5424 if (laddr->ifa == ifa) { 5425 fnd = 1; 5426 break; 5427 } 5428 } 5429 if (fnd && (inp->laddr_count < 2)) { 5430 /* can't delete unless there are at LEAST 2 addresses */ 5431 return; 5432 } 5433 if (fnd) { 5434 /* 5435 * clean up any use of this address go through our 5436 * associations and clear any last_used_address that match 5437 * this one for each assoc, see if a new primary_destination 5438 * is needed 5439 */ 5440 struct sctp_tcb *stcb; 5441 5442 /* clean up "next_addr_touse" */ 5443 if (inp->next_addr_touse == laddr) 5444 /* delete this address */ 5445 inp->next_addr_touse = NULL; 5446 5447 /* clean up "last_used_address" */ 5448 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5449 struct sctp_nets *net; 5450 5451 SCTP_TCB_LOCK(stcb); 5452 if (stcb->asoc.last_used_address == laddr) 5453 /* delete this address */ 5454 stcb->asoc.last_used_address = NULL; 5455 /* 5456 * Now spin through all the nets and purge any ref 5457 * to laddr 5458 */ 5459 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5460 if (net->ro._s_addr && 5461 (net->ro._s_addr->ifa == laddr->ifa)) { 5462 /* Yep, purge src address selected */ 5463 sctp_rtentry_t *rt; 5464 5465 /* delete this address if cached */ 5466 rt = net->ro.ro_rt; 5467 if (rt != NULL) { 5468 RTFREE(rt); 5469 net->ro.ro_rt = NULL; 5470 } 5471 sctp_free_ifa(net->ro._s_addr); 5472 net->ro._s_addr = NULL; 5473 net->src_addr_selected = 0; 5474 } 5475 } 5476 SCTP_TCB_UNLOCK(stcb); 5477 } /* for each tcb */ 5478 /* remove it from the ep list */ 5479 sctp_remove_laddr(laddr); 5480 inp->laddr_count--; 5481 /* update inp_vflag flags */ 5482 sctp_update_ep_vflag(inp); 5483 } 5484 return; 5485 } 5486 5487 /* 5488 * Add the address to the TCB local address restricted list. 5489 * This is a "pending" address list (eg. addresses waiting for an 5490 * ASCONF-ACK response) and cannot be used as a valid source address. 5491 */ 5492 void 5493 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5494 { 5495 struct sctp_laddr *laddr; 5496 struct sctpladdr *list; 5497 5498 /* 5499 * Assumes TCB is locked.. and possibly the INP. May need to 5500 * confirm/fix that if we need it and is not the case. 5501 */ 5502 list = &stcb->asoc.sctp_restricted_addrs; 5503 5504 #ifdef INET6 5505 if (ifa->address.sa.sa_family == AF_INET6) { 5506 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5507 /* Can't bind a non-existent addr. */ 5508 return; 5509 } 5510 } 5511 #endif 5512 /* does the address already exist? */ 5513 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5514 if (laddr->ifa == ifa) { 5515 return; 5516 } 5517 } 5518 5519 /* add to the list */ 5520 (void)sctp_insert_laddr(list, ifa, 0); 5521 return; 5522 } 5523 5524 /* 5525 * insert an laddr entry with the given ifa for the desired list 5526 */ 5527 int 5528 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5529 { 5530 struct sctp_laddr *laddr; 5531 5532 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5533 if (laddr == NULL) { 5534 /* out of memory? */ 5535 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5536 return (EINVAL); 5537 } 5538 SCTP_INCR_LADDR_COUNT(); 5539 bzero(laddr, sizeof(*laddr)); 5540 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5541 laddr->ifa = ifa; 5542 laddr->action = act; 5543 atomic_add_int(&ifa->refcount, 1); 5544 /* insert it */ 5545 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5546 5547 return (0); 5548 } 5549 5550 /* 5551 * Remove an laddr entry from the local address list (on an assoc) 5552 */ 5553 void 5554 sctp_remove_laddr(struct sctp_laddr *laddr) 5555 { 5556 5557 /* remove from the list */ 5558 LIST_REMOVE(laddr, sctp_nxt_addr); 5559 sctp_free_ifa(laddr->ifa); 5560 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5561 SCTP_DECR_LADDR_COUNT(); 5562 } 5563 5564 /* 5565 * Remove a local address from the TCB local address restricted list 5566 */ 5567 void 5568 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5569 { 5570 struct sctp_inpcb *inp; 5571 struct sctp_laddr *laddr; 5572 5573 /* 5574 * This is called by asconf work. It is assumed that a) The TCB is 5575 * locked and b) The INP is locked. This is true in as much as I can 5576 * trace through the entry asconf code where I did these locks. 5577 * Again, the ASCONF code is a bit different in that it does lock 5578 * the INP during its work often times. This must be since we don't 5579 * want other proc's looking up things while what they are looking 5580 * up is changing :-D 5581 */ 5582 5583 inp = stcb->sctp_ep; 5584 /* if subset bound and don't allow ASCONF's, can't delete last */ 5585 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5586 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5587 if (stcb->sctp_ep->laddr_count < 2) { 5588 /* can't delete last address */ 5589 return; 5590 } 5591 } 5592 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5593 /* remove the address if it exists */ 5594 if (laddr->ifa == NULL) 5595 continue; 5596 if (laddr->ifa == ifa) { 5597 sctp_remove_laddr(laddr); 5598 return; 5599 } 5600 } 5601 5602 /* address not found! */ 5603 return; 5604 } 5605 5606 /* 5607 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5608 */ 5609 /* sysctl */ 5610 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5611 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5612 5613 5614 5615 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5616 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5617 int *sctp_cpuarry = NULL; 5618 void 5619 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5620 { 5621 /* Queue a packet to a processor for the specified core */ 5622 struct sctp_mcore_queue *qent; 5623 struct sctp_mcore_ctrl *wkq; 5624 int need_wake = 0; 5625 5626 if (sctp_mcore_workers == NULL) { 5627 /* Something went way bad during setup */ 5628 sctp_input_with_port(m, off, 0); 5629 return; 5630 } 5631 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5632 (sizeof(struct sctp_mcore_queue)), 5633 SCTP_M_MCORE); 5634 if (qent == NULL) { 5635 /* This is trouble */ 5636 sctp_input_with_port(m, off, 0); 5637 return; 5638 } 5639 qent->vn = curvnet; 5640 qent->m = m; 5641 qent->off = off; 5642 qent->v6 = 0; 5643 wkq = &sctp_mcore_workers[cpu_to_use]; 5644 SCTP_MCORE_QLOCK(wkq); 5645 5646 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5647 if (wkq->running == 0) { 5648 need_wake = 1; 5649 } 5650 SCTP_MCORE_QUNLOCK(wkq); 5651 if (need_wake) { 5652 wakeup(&wkq->running); 5653 } 5654 } 5655 5656 static void 5657 sctp_mcore_thread(void *arg) 5658 { 5659 5660 struct sctp_mcore_ctrl *wkq; 5661 struct sctp_mcore_queue *qent; 5662 5663 wkq = (struct sctp_mcore_ctrl *)arg; 5664 struct mbuf *m; 5665 int off, v6; 5666 5667 /* Wait for first tickle */ 5668 SCTP_MCORE_LOCK(wkq); 5669 wkq->running = 0; 5670 msleep(&wkq->running, 5671 &wkq->core_mtx, 5672 0, "wait for pkt", 0); 5673 SCTP_MCORE_UNLOCK(wkq); 5674 5675 /* Bind to our cpu */ 5676 thread_lock(curthread); 5677 sched_bind(curthread, wkq->cpuid); 5678 thread_unlock(curthread); 5679 5680 /* Now lets start working */ 5681 SCTP_MCORE_LOCK(wkq); 5682 /* Now grab lock and go */ 5683 for (;;) { 5684 SCTP_MCORE_QLOCK(wkq); 5685 skip_sleep: 5686 wkq->running = 1; 5687 qent = TAILQ_FIRST(&wkq->que); 5688 if (qent) { 5689 TAILQ_REMOVE(&wkq->que, qent, next); 5690 SCTP_MCORE_QUNLOCK(wkq); 5691 CURVNET_SET(qent->vn); 5692 m = qent->m; 5693 off = qent->off; 5694 v6 = qent->v6; 5695 SCTP_FREE(qent, SCTP_M_MCORE); 5696 if (v6 == 0) { 5697 sctp_input_with_port(m, off, 0); 5698 } else { 5699 SCTP_PRINTF("V6 not yet supported\n"); 5700 sctp_m_freem(m); 5701 } 5702 CURVNET_RESTORE(); 5703 SCTP_MCORE_QLOCK(wkq); 5704 } 5705 wkq->running = 0; 5706 if (!TAILQ_EMPTY(&wkq->que)) { 5707 goto skip_sleep; 5708 } 5709 SCTP_MCORE_QUNLOCK(wkq); 5710 msleep(&wkq->running, 5711 &wkq->core_mtx, 5712 0, "wait for pkt", 0); 5713 } 5714 } 5715 5716 static void 5717 sctp_startup_mcore_threads(void) 5718 { 5719 int i, cpu; 5720 5721 if (mp_ncpus == 1) 5722 return; 5723 5724 if (sctp_mcore_workers != NULL) { 5725 /* 5726 * Already been here in some previous vnet? 5727 */ 5728 return; 5729 } 5730 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5731 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5732 SCTP_M_MCORE); 5733 if (sctp_mcore_workers == NULL) { 5734 /* TSNH I hope */ 5735 return; 5736 } 5737 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5738 sizeof(struct sctp_mcore_ctrl))); 5739 /* Init the structures */ 5740 for (i = 0; i <= mp_maxid; i++) { 5741 TAILQ_INIT(&sctp_mcore_workers[i].que); 5742 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5743 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5744 sctp_mcore_workers[i].cpuid = i; 5745 } 5746 if (sctp_cpuarry == NULL) { 5747 SCTP_MALLOC(sctp_cpuarry, int *, 5748 (mp_ncpus * sizeof(int)), 5749 SCTP_M_MCORE); 5750 i = 0; 5751 CPU_FOREACH(cpu) { 5752 sctp_cpuarry[i] = cpu; 5753 i++; 5754 } 5755 } 5756 /* Now start them all */ 5757 CPU_FOREACH(cpu) { 5758 (void)kproc_create(sctp_mcore_thread, 5759 (void *)&sctp_mcore_workers[cpu], 5760 &sctp_mcore_workers[cpu].thread_proc, 5761 RFPROC, 5762 SCTP_KTHREAD_PAGES, 5763 SCTP_MCORE_NAME); 5764 5765 } 5766 } 5767 5768 #endif 5769 5770 void 5771 sctp_pcb_init() 5772 { 5773 /* 5774 * SCTP initialization for the PCB structures should be called by 5775 * the sctp_init() funciton. 5776 */ 5777 int i; 5778 struct timeval tv; 5779 5780 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5781 /* error I was called twice */ 5782 return; 5783 } 5784 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5785 5786 #if defined(SCTP_LOCAL_TRACE_BUF) 5787 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5788 #endif 5789 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5790 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5791 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5792 SCTP_M_MCORE); 5793 #endif 5794 (void)SCTP_GETTIME_TIMEVAL(&tv); 5795 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5796 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5797 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5798 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5799 #else 5800 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5801 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5802 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5803 #endif 5804 /* init the empty list of (All) Endpoints */ 5805 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5806 5807 5808 /* init the hash table of endpoints */ 5809 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5810 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5811 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5812 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5813 &SCTP_BASE_INFO(hashasocmark)); 5814 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5815 &SCTP_BASE_INFO(hashmark)); 5816 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5817 &SCTP_BASE_INFO(hashtcpmark)); 5818 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5819 5820 5821 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5822 &SCTP_BASE_INFO(hashvrfmark)); 5823 5824 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5825 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5826 /* init the zones */ 5827 /* 5828 * FIX ME: Should check for NULL returns, but if it does fail we are 5829 * doomed to panic anyways... add later maybe. 5830 */ 5831 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5832 sizeof(struct sctp_inpcb), maxsockets); 5833 5834 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5835 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5836 5837 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5838 sizeof(struct sctp_laddr), 5839 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5840 5841 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5842 sizeof(struct sctp_nets), 5843 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5844 5845 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5846 sizeof(struct sctp_tmit_chunk), 5847 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5848 5849 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5850 sizeof(struct sctp_queued_to_read), 5851 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5852 5853 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5854 sizeof(struct sctp_stream_queue_pending), 5855 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5856 5857 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5858 sizeof(struct sctp_asconf), 5859 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5860 5861 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5862 sizeof(struct sctp_asconf_ack), 5863 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5864 5865 5866 /* Master Lock INIT for info structure */ 5867 SCTP_INP_INFO_LOCK_INIT(); 5868 SCTP_STATLOG_INIT_LOCK(); 5869 5870 SCTP_IPI_COUNT_INIT(); 5871 SCTP_IPI_ADDR_INIT(); 5872 #ifdef SCTP_PACKET_LOGGING 5873 SCTP_IP_PKTLOG_INIT(); 5874 #endif 5875 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5876 5877 SCTP_WQ_ADDR_INIT(); 5878 /* not sure if we need all the counts */ 5879 SCTP_BASE_INFO(ipi_count_ep) = 0; 5880 /* assoc/tcb zone info */ 5881 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5882 /* local addrlist zone info */ 5883 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5884 /* remote addrlist zone info */ 5885 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5886 /* chunk info */ 5887 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5888 5889 /* socket queue zone info */ 5890 SCTP_BASE_INFO(ipi_count_readq) = 0; 5891 5892 /* stream out queue cont */ 5893 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5894 5895 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5896 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5897 5898 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5899 5900 /* Init the TIMEWAIT list */ 5901 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5902 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5903 } 5904 sctp_startup_iterator(); 5905 5906 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5907 sctp_startup_mcore_threads(); 5908 #endif 5909 5910 /* 5911 * INIT the default VRF which for BSD is the only one, other O/S's 5912 * may have more. But initially they must start with one and then 5913 * add the VRF's as addresses are added. 5914 */ 5915 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5916 } 5917 5918 /* 5919 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5920 */ 5921 void 5922 sctp_pcb_finish(void) 5923 { 5924 struct sctp_vrflist *vrf_bucket; 5925 struct sctp_vrf *vrf, *nvrf; 5926 struct sctp_ifn *ifn, *nifn; 5927 struct sctp_ifa *ifa, *nifa; 5928 struct sctpvtaghead *chain; 5929 struct sctp_tagblock *twait_block, *prev_twait_block; 5930 struct sctp_laddr *wi, *nwi; 5931 int i; 5932 struct sctp_iterator *it, *nit; 5933 5934 /* 5935 * In FreeBSD the iterator thread never exits but we do clean up. 5936 * The only way FreeBSD reaches here is if we have VRF's but we 5937 * still add the ifdef to make it compile on old versions. 5938 */ 5939 SCTP_IPI_ITERATOR_WQ_LOCK(); 5940 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5941 if (it->vn != curvnet) { 5942 continue; 5943 } 5944 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5945 if (it->function_atend != NULL) { 5946 (*it->function_atend) (it->pointer, it->val); 5947 } 5948 SCTP_FREE(it, SCTP_M_ITER); 5949 } 5950 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5951 SCTP_ITERATOR_LOCK(); 5952 if ((sctp_it_ctl.cur_it) && 5953 (sctp_it_ctl.cur_it->vn == curvnet)) { 5954 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5955 } 5956 SCTP_ITERATOR_UNLOCK(); 5957 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5958 SCTP_WQ_ADDR_LOCK(); 5959 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5960 LIST_REMOVE(wi, sctp_nxt_addr); 5961 SCTP_DECR_LADDR_COUNT(); 5962 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5963 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5964 } 5965 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5966 } 5967 SCTP_WQ_ADDR_UNLOCK(); 5968 5969 /* 5970 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5971 * destroyed first). 5972 */ 5973 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5974 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5975 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5976 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5977 /* free the ifa */ 5978 LIST_REMOVE(ifa, next_bucket); 5979 LIST_REMOVE(ifa, next_ifa); 5980 SCTP_FREE(ifa, SCTP_M_IFA); 5981 } 5982 /* free the ifn */ 5983 LIST_REMOVE(ifn, next_bucket); 5984 LIST_REMOVE(ifn, next_ifn); 5985 SCTP_FREE(ifn, SCTP_M_IFN); 5986 } 5987 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5988 /* free the vrf */ 5989 LIST_REMOVE(vrf, next_vrf); 5990 SCTP_FREE(vrf, SCTP_M_VRF); 5991 } 5992 /* free the vrf hashes */ 5993 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5994 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5995 5996 /* 5997 * free the TIMEWAIT list elements malloc'd in the function 5998 * sctp_add_vtag_to_timewait()... 5999 */ 6000 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6001 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6002 if (!LIST_EMPTY(chain)) { 6003 prev_twait_block = NULL; 6004 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6005 if (prev_twait_block) { 6006 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6007 } 6008 prev_twait_block = twait_block; 6009 } 6010 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6011 } 6012 } 6013 6014 /* free the locks and mutexes */ 6015 #ifdef SCTP_PACKET_LOGGING 6016 SCTP_IP_PKTLOG_DESTROY(); 6017 #endif 6018 SCTP_IPI_ADDR_DESTROY(); 6019 SCTP_STATLOG_DESTROY(); 6020 SCTP_INP_INFO_LOCK_DESTROY(); 6021 6022 SCTP_WQ_ADDR_DESTROY(); 6023 6024 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6025 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6026 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6027 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6028 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6029 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6030 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6031 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6032 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6033 /* Get rid of other stuff to */ 6034 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6035 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6036 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6037 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6038 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6039 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6040 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6041 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6042 #endif 6043 } 6044 6045 6046 int 6047 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6048 int offset, int limit, 6049 struct sockaddr *src, struct sockaddr *dst, 6050 struct sockaddr *altsa) 6051 { 6052 /* 6053 * grub through the INIT pulling addresses and loading them to the 6054 * nets structure in the asoc. The from address in the mbuf should 6055 * also be loaded (if it is not already). This routine can be called 6056 * with either INIT or INIT-ACK's as long as the m points to the IP 6057 * packet and the offset points to the beginning of the parameters. 6058 */ 6059 struct sctp_inpcb *inp; 6060 struct sctp_nets *net, *nnet, *net_tmp; 6061 struct sctp_paramhdr *phdr, parm_buf; 6062 struct sctp_tcb *stcb_tmp; 6063 uint16_t ptype, plen; 6064 struct sockaddr *sa; 6065 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6066 struct sctp_auth_random *p_random = NULL; 6067 uint16_t random_len = 0; 6068 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6069 struct sctp_auth_hmac_algo *hmacs = NULL; 6070 uint16_t hmacs_len = 0; 6071 uint8_t saw_asconf = 0; 6072 uint8_t saw_asconf_ack = 0; 6073 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6074 struct sctp_auth_chunk_list *chunks = NULL; 6075 uint16_t num_chunks = 0; 6076 sctp_key_t *new_key; 6077 uint32_t keylen; 6078 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6079 uint8_t peer_supports_ecn; 6080 uint8_t peer_supports_prsctp; 6081 uint8_t peer_supports_auth; 6082 uint8_t peer_supports_asconf; 6083 uint8_t peer_supports_asconf_ack; 6084 uint8_t peer_supports_reconfig; 6085 uint8_t peer_supports_nrsack; 6086 uint8_t peer_supports_pktdrop; 6087 6088 #ifdef INET 6089 struct sockaddr_in sin; 6090 6091 #endif 6092 #ifdef INET6 6093 struct sockaddr_in6 sin6; 6094 6095 #endif 6096 6097 /* First get the destination address setup too. */ 6098 #ifdef INET 6099 memset(&sin, 0, sizeof(sin)); 6100 sin.sin_family = AF_INET; 6101 sin.sin_len = sizeof(sin); 6102 sin.sin_port = stcb->rport; 6103 #endif 6104 #ifdef INET6 6105 memset(&sin6, 0, sizeof(sin6)); 6106 sin6.sin6_family = AF_INET6; 6107 sin6.sin6_len = sizeof(struct sockaddr_in6); 6108 sin6.sin6_port = stcb->rport; 6109 #endif 6110 if (altsa) { 6111 sa = altsa; 6112 } else { 6113 sa = src; 6114 } 6115 peer_supports_ecn = 0; 6116 peer_supports_prsctp = 0; 6117 peer_supports_auth = 0; 6118 peer_supports_asconf = 0; 6119 peer_supports_reconfig = 0; 6120 peer_supports_nrsack = 0; 6121 peer_supports_pktdrop = 0; 6122 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6123 /* mark all addresses that we have currently on the list */ 6124 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6125 } 6126 /* does the source address already exist? if so skip it */ 6127 inp = stcb->sctp_ep; 6128 atomic_add_int(&stcb->asoc.refcnt, 1); 6129 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6130 atomic_add_int(&stcb->asoc.refcnt, -1); 6131 6132 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6133 /* we must add the source address */ 6134 /* no scope set here since we have a tcb already. */ 6135 switch (sa->sa_family) { 6136 #ifdef INET 6137 case AF_INET: 6138 if (stcb->asoc.scope.ipv4_addr_legal) { 6139 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6140 return (-1); 6141 } 6142 } 6143 break; 6144 #endif 6145 #ifdef INET6 6146 case AF_INET6: 6147 if (stcb->asoc.scope.ipv6_addr_legal) { 6148 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6149 return (-2); 6150 } 6151 } 6152 break; 6153 #endif 6154 default: 6155 break; 6156 } 6157 } else { 6158 if (net_tmp != NULL && stcb_tmp == stcb) { 6159 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6160 } else if (stcb_tmp != stcb) { 6161 /* It belongs to another association? */ 6162 if (stcb_tmp) 6163 SCTP_TCB_UNLOCK(stcb_tmp); 6164 return (-3); 6165 } 6166 } 6167 if (stcb->asoc.state == 0) { 6168 /* the assoc was freed? */ 6169 return (-4); 6170 } 6171 /* now we must go through each of the params. */ 6172 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6173 while (phdr) { 6174 ptype = ntohs(phdr->param_type); 6175 plen = ntohs(phdr->param_length); 6176 /* 6177 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6178 * (uint32_t)ptype, (int)plen); 6179 */ 6180 if (offset + plen > limit) { 6181 break; 6182 } 6183 if (plen == 0) { 6184 break; 6185 } 6186 #ifdef INET 6187 if (ptype == SCTP_IPV4_ADDRESS) { 6188 if (stcb->asoc.scope.ipv4_addr_legal) { 6189 struct sctp_ipv4addr_param *p4, p4_buf; 6190 6191 /* ok get the v4 address and check/add */ 6192 phdr = sctp_get_next_param(m, offset, 6193 (struct sctp_paramhdr *)&p4_buf, 6194 sizeof(p4_buf)); 6195 if (plen != sizeof(struct sctp_ipv4addr_param) || 6196 phdr == NULL) { 6197 return (-5); 6198 } 6199 p4 = (struct sctp_ipv4addr_param *)phdr; 6200 sin.sin_addr.s_addr = p4->addr; 6201 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6202 /* Skip multi-cast addresses */ 6203 goto next_param; 6204 } 6205 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6206 (sin.sin_addr.s_addr == INADDR_ANY)) { 6207 goto next_param; 6208 } 6209 sa = (struct sockaddr *)&sin; 6210 inp = stcb->sctp_ep; 6211 atomic_add_int(&stcb->asoc.refcnt, 1); 6212 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6213 dst, stcb); 6214 atomic_add_int(&stcb->asoc.refcnt, -1); 6215 6216 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6217 inp == NULL) { 6218 /* we must add the source address */ 6219 /* 6220 * no scope set since we have a tcb 6221 * already 6222 */ 6223 6224 /* 6225 * we must validate the state again 6226 * here 6227 */ 6228 add_it_now: 6229 if (stcb->asoc.state == 0) { 6230 /* the assoc was freed? */ 6231 return (-7); 6232 } 6233 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6234 return (-8); 6235 } 6236 } else if (stcb_tmp == stcb) { 6237 if (stcb->asoc.state == 0) { 6238 /* the assoc was freed? */ 6239 return (-10); 6240 } 6241 if (net != NULL) { 6242 /* clear flag */ 6243 net->dest_state &= 6244 ~SCTP_ADDR_NOT_IN_ASSOC; 6245 } 6246 } else { 6247 /* 6248 * strange, address is in another 6249 * assoc? straighten out locks. 6250 */ 6251 if (stcb_tmp) { 6252 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6253 struct mbuf *op_err; 6254 char msg[SCTP_DIAG_INFO_LEN]; 6255 6256 /* 6257 * in setup state we 6258 * abort this guy 6259 */ 6260 snprintf(msg, sizeof(msg), 6261 "%s:%d at %s", __FILE__, __LINE__, __func__); 6262 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6263 msg); 6264 sctp_abort_an_association(stcb_tmp->sctp_ep, 6265 stcb_tmp, op_err, 6266 SCTP_SO_NOT_LOCKED); 6267 goto add_it_now; 6268 } 6269 SCTP_TCB_UNLOCK(stcb_tmp); 6270 } 6271 if (stcb->asoc.state == 0) { 6272 /* the assoc was freed? */ 6273 return (-12); 6274 } 6275 return (-13); 6276 } 6277 } 6278 } else 6279 #endif 6280 #ifdef INET6 6281 if (ptype == SCTP_IPV6_ADDRESS) { 6282 if (stcb->asoc.scope.ipv6_addr_legal) { 6283 /* ok get the v6 address and check/add */ 6284 struct sctp_ipv6addr_param *p6, p6_buf; 6285 6286 phdr = sctp_get_next_param(m, offset, 6287 (struct sctp_paramhdr *)&p6_buf, 6288 sizeof(p6_buf)); 6289 if (plen != sizeof(struct sctp_ipv6addr_param) || 6290 phdr == NULL) { 6291 return (-14); 6292 } 6293 p6 = (struct sctp_ipv6addr_param *)phdr; 6294 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6295 sizeof(p6->addr)); 6296 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6297 /* Skip multi-cast addresses */ 6298 goto next_param; 6299 } 6300 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6301 /* 6302 * Link local make no sense without 6303 * scope 6304 */ 6305 goto next_param; 6306 } 6307 sa = (struct sockaddr *)&sin6; 6308 inp = stcb->sctp_ep; 6309 atomic_add_int(&stcb->asoc.refcnt, 1); 6310 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6311 dst, stcb); 6312 atomic_add_int(&stcb->asoc.refcnt, -1); 6313 if (stcb_tmp == NULL && 6314 (inp == stcb->sctp_ep || inp == NULL)) { 6315 /* 6316 * we must validate the state again 6317 * here 6318 */ 6319 add_it_now6: 6320 if (stcb->asoc.state == 0) { 6321 /* the assoc was freed? */ 6322 return (-16); 6323 } 6324 /* 6325 * we must add the address, no scope 6326 * set 6327 */ 6328 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6329 return (-17); 6330 } 6331 } else if (stcb_tmp == stcb) { 6332 /* 6333 * we must validate the state again 6334 * here 6335 */ 6336 if (stcb->asoc.state == 0) { 6337 /* the assoc was freed? */ 6338 return (-19); 6339 } 6340 if (net != NULL) { 6341 /* clear flag */ 6342 net->dest_state &= 6343 ~SCTP_ADDR_NOT_IN_ASSOC; 6344 } 6345 } else { 6346 /* 6347 * strange, address is in another 6348 * assoc? straighten out locks. 6349 */ 6350 if (stcb_tmp) { 6351 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6352 struct mbuf *op_err; 6353 char msg[SCTP_DIAG_INFO_LEN]; 6354 6355 /* 6356 * in setup state we 6357 * abort this guy 6358 */ 6359 snprintf(msg, sizeof(msg), 6360 "%s:%d at %s", __FILE__, __LINE__, __func__); 6361 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6362 msg); 6363 sctp_abort_an_association(stcb_tmp->sctp_ep, 6364 stcb_tmp, op_err, 6365 SCTP_SO_NOT_LOCKED); 6366 goto add_it_now6; 6367 } 6368 SCTP_TCB_UNLOCK(stcb_tmp); 6369 } 6370 if (stcb->asoc.state == 0) { 6371 /* the assoc was freed? */ 6372 return (-21); 6373 } 6374 return (-22); 6375 } 6376 } 6377 } else 6378 #endif 6379 if (ptype == SCTP_ECN_CAPABLE) { 6380 peer_supports_ecn = 1; 6381 } else if (ptype == SCTP_ULP_ADAPTATION) { 6382 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6383 struct sctp_adaptation_layer_indication ai, 6384 *aip; 6385 6386 phdr = sctp_get_next_param(m, offset, 6387 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6388 aip = (struct sctp_adaptation_layer_indication *)phdr; 6389 if (aip) { 6390 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6391 stcb->asoc.adaptation_needed = 1; 6392 } 6393 } 6394 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6395 struct sctp_asconf_addr_param lstore, *fee; 6396 int lptype; 6397 struct sockaddr *lsa = NULL; 6398 6399 #ifdef INET 6400 struct sctp_asconf_addrv4_param *fii; 6401 6402 #endif 6403 6404 if (stcb->asoc.asconf_supported == 0) { 6405 return (-100); 6406 } 6407 if (plen > sizeof(lstore)) { 6408 return (-23); 6409 } 6410 phdr = sctp_get_next_param(m, offset, 6411 (struct sctp_paramhdr *)&lstore, 6412 min(plen, sizeof(lstore))); 6413 if (phdr == NULL) { 6414 return (-24); 6415 } 6416 fee = (struct sctp_asconf_addr_param *)phdr; 6417 lptype = ntohs(fee->addrp.ph.param_type); 6418 switch (lptype) { 6419 #ifdef INET 6420 case SCTP_IPV4_ADDRESS: 6421 if (plen != 6422 sizeof(struct sctp_asconf_addrv4_param)) { 6423 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6424 (int)sizeof(struct sctp_asconf_addrv4_param), 6425 plen); 6426 } else { 6427 fii = (struct sctp_asconf_addrv4_param *)fee; 6428 sin.sin_addr.s_addr = fii->addrp.addr; 6429 lsa = (struct sockaddr *)&sin; 6430 } 6431 break; 6432 #endif 6433 #ifdef INET6 6434 case SCTP_IPV6_ADDRESS: 6435 if (plen != 6436 sizeof(struct sctp_asconf_addr_param)) { 6437 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6438 (int)sizeof(struct sctp_asconf_addr_param), 6439 plen); 6440 } else { 6441 memcpy(sin6.sin6_addr.s6_addr, 6442 fee->addrp.addr, 6443 sizeof(fee->addrp.addr)); 6444 lsa = (struct sockaddr *)&sin6; 6445 } 6446 break; 6447 #endif 6448 default: 6449 break; 6450 } 6451 if (lsa) { 6452 (void)sctp_set_primary_addr(stcb, sa, NULL); 6453 } 6454 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6455 stcb->asoc.peer_supports_nat = 1; 6456 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6457 /* Peer supports pr-sctp */ 6458 peer_supports_prsctp = 1; 6459 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6460 /* A supported extension chunk */ 6461 struct sctp_supported_chunk_types_param *pr_supported; 6462 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6463 int num_ent, i; 6464 6465 phdr = sctp_get_next_param(m, offset, 6466 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6467 if (phdr == NULL) { 6468 return (-25); 6469 } 6470 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6471 num_ent = plen - sizeof(struct sctp_paramhdr); 6472 for (i = 0; i < num_ent; i++) { 6473 switch (pr_supported->chunk_types[i]) { 6474 case SCTP_ASCONF: 6475 peer_supports_asconf = 1; 6476 break; 6477 case SCTP_ASCONF_ACK: 6478 peer_supports_asconf_ack = 1; 6479 break; 6480 case SCTP_FORWARD_CUM_TSN: 6481 peer_supports_prsctp = 1; 6482 break; 6483 case SCTP_PACKET_DROPPED: 6484 peer_supports_pktdrop = 1; 6485 break; 6486 case SCTP_NR_SELECTIVE_ACK: 6487 peer_supports_nrsack = 1; 6488 break; 6489 case SCTP_STREAM_RESET: 6490 peer_supports_reconfig = 1; 6491 break; 6492 case SCTP_AUTHENTICATION: 6493 peer_supports_auth = 1; 6494 break; 6495 default: 6496 /* one I have not learned yet */ 6497 break; 6498 6499 } 6500 } 6501 } else if (ptype == SCTP_RANDOM) { 6502 if (plen > sizeof(random_store)) 6503 break; 6504 if (got_random) { 6505 /* already processed a RANDOM */ 6506 goto next_param; 6507 } 6508 phdr = sctp_get_next_param(m, offset, 6509 (struct sctp_paramhdr *)random_store, 6510 min(sizeof(random_store), plen)); 6511 if (phdr == NULL) 6512 return (-26); 6513 p_random = (struct sctp_auth_random *)phdr; 6514 random_len = plen - sizeof(*p_random); 6515 /* enforce the random length */ 6516 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6517 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6518 return (-27); 6519 } 6520 got_random = 1; 6521 } else if (ptype == SCTP_HMAC_LIST) { 6522 uint16_t num_hmacs; 6523 uint16_t i; 6524 6525 if (plen > sizeof(hmacs_store)) 6526 break; 6527 if (got_hmacs) { 6528 /* already processed a HMAC list */ 6529 goto next_param; 6530 } 6531 phdr = sctp_get_next_param(m, offset, 6532 (struct sctp_paramhdr *)hmacs_store, 6533 min(plen, sizeof(hmacs_store))); 6534 if (phdr == NULL) 6535 return (-28); 6536 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6537 hmacs_len = plen - sizeof(*hmacs); 6538 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6539 /* validate the hmac list */ 6540 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6541 return (-29); 6542 } 6543 if (stcb->asoc.peer_hmacs != NULL) 6544 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6545 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6546 if (stcb->asoc.peer_hmacs != NULL) { 6547 for (i = 0; i < num_hmacs; i++) { 6548 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6549 ntohs(hmacs->hmac_ids[i])); 6550 } 6551 } 6552 got_hmacs = 1; 6553 } else if (ptype == SCTP_CHUNK_LIST) { 6554 int i; 6555 6556 if (plen > sizeof(chunks_store)) 6557 break; 6558 if (got_chklist) { 6559 /* already processed a Chunks list */ 6560 goto next_param; 6561 } 6562 phdr = sctp_get_next_param(m, offset, 6563 (struct sctp_paramhdr *)chunks_store, 6564 min(plen, sizeof(chunks_store))); 6565 if (phdr == NULL) 6566 return (-30); 6567 chunks = (struct sctp_auth_chunk_list *)phdr; 6568 num_chunks = plen - sizeof(*chunks); 6569 if (stcb->asoc.peer_auth_chunks != NULL) 6570 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6571 else 6572 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6573 for (i = 0; i < num_chunks; i++) { 6574 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6575 stcb->asoc.peer_auth_chunks); 6576 /* record asconf/asconf-ack if listed */ 6577 if (chunks->chunk_types[i] == SCTP_ASCONF) 6578 saw_asconf = 1; 6579 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6580 saw_asconf_ack = 1; 6581 6582 } 6583 got_chklist = 1; 6584 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6585 (ptype == SCTP_STATE_COOKIE) || 6586 (ptype == SCTP_UNRECOG_PARAM) || 6587 (ptype == SCTP_COOKIE_PRESERVE) || 6588 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6589 (ptype == SCTP_ADD_IP_ADDRESS) || 6590 (ptype == SCTP_DEL_IP_ADDRESS) || 6591 (ptype == SCTP_ERROR_CAUSE_IND) || 6592 (ptype == SCTP_SUCCESS_REPORT)) { 6593 /* don't care */ ; 6594 } else { 6595 if ((ptype & 0x8000) == 0x0000) { 6596 /* 6597 * must stop processing the rest of the 6598 * param's. Any report bits were handled 6599 * with the call to 6600 * sctp_arethere_unrecognized_parameters() 6601 * when the INIT or INIT-ACK was first seen. 6602 */ 6603 break; 6604 } 6605 } 6606 6607 next_param: 6608 offset += SCTP_SIZE32(plen); 6609 if (offset >= limit) { 6610 break; 6611 } 6612 phdr = sctp_get_next_param(m, offset, &parm_buf, 6613 sizeof(parm_buf)); 6614 } 6615 /* Now check to see if we need to purge any addresses */ 6616 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6617 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6618 SCTP_ADDR_NOT_IN_ASSOC) { 6619 /* This address has been removed from the asoc */ 6620 /* remove and free it */ 6621 stcb->asoc.numnets--; 6622 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6623 sctp_free_remote_addr(net); 6624 if (net == stcb->asoc.primary_destination) { 6625 stcb->asoc.primary_destination = NULL; 6626 sctp_select_primary_destination(stcb); 6627 } 6628 } 6629 } 6630 if ((stcb->asoc.ecn_supported == 1) && 6631 (peer_supports_ecn == 0)) { 6632 stcb->asoc.ecn_supported = 0; 6633 } 6634 if ((stcb->asoc.prsctp_supported == 1) && 6635 (peer_supports_prsctp == 0)) { 6636 stcb->asoc.prsctp_supported = 0; 6637 } 6638 if ((stcb->asoc.auth_supported == 1) && 6639 ((peer_supports_auth == 0) || 6640 (got_random == 0) || (got_hmacs == 0))) { 6641 stcb->asoc.auth_supported = 0; 6642 } 6643 if ((stcb->asoc.asconf_supported == 1) && 6644 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6645 (stcb->asoc.auth_supported == 0) || 6646 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6647 stcb->asoc.asconf_supported = 0; 6648 } 6649 if ((stcb->asoc.reconfig_supported == 1) && 6650 (peer_supports_reconfig == 0)) { 6651 stcb->asoc.reconfig_supported = 0; 6652 } 6653 if ((stcb->asoc.nrsack_supported == 1) && 6654 (peer_supports_nrsack == 0)) { 6655 stcb->asoc.nrsack_supported = 0; 6656 } 6657 if ((stcb->asoc.pktdrop_supported == 1) && 6658 (peer_supports_pktdrop == 0)) { 6659 stcb->asoc.pktdrop_supported = 0; 6660 } 6661 /* validate authentication required parameters */ 6662 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6663 /* peer does not support auth but sent a chunks list? */ 6664 return (-31); 6665 } 6666 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6667 /* peer supports asconf but not auth? */ 6668 return (-32); 6669 } else if ((peer_supports_asconf == 1) && 6670 (peer_supports_auth == 1) && 6671 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6672 return (-33); 6673 } 6674 /* concatenate the full random key */ 6675 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6676 if (chunks != NULL) { 6677 keylen += sizeof(*chunks) + num_chunks; 6678 } 6679 new_key = sctp_alloc_key(keylen); 6680 if (new_key != NULL) { 6681 /* copy in the RANDOM */ 6682 if (p_random != NULL) { 6683 keylen = sizeof(*p_random) + random_len; 6684 bcopy(p_random, new_key->key, keylen); 6685 } 6686 /* append in the AUTH chunks */ 6687 if (chunks != NULL) { 6688 bcopy(chunks, new_key->key + keylen, 6689 sizeof(*chunks) + num_chunks); 6690 keylen += sizeof(*chunks) + num_chunks; 6691 } 6692 /* append in the HMACs */ 6693 if (hmacs != NULL) { 6694 bcopy(hmacs, new_key->key + keylen, 6695 sizeof(*hmacs) + hmacs_len); 6696 } 6697 } else { 6698 /* failed to get memory for the key */ 6699 return (-34); 6700 } 6701 if (stcb->asoc.authinfo.peer_random != NULL) 6702 sctp_free_key(stcb->asoc.authinfo.peer_random); 6703 stcb->asoc.authinfo.peer_random = new_key; 6704 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6705 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6706 6707 return (0); 6708 } 6709 6710 int 6711 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6712 struct sctp_nets *net) 6713 { 6714 /* make sure the requested primary address exists in the assoc */ 6715 if (net == NULL && sa) 6716 net = sctp_findnet(stcb, sa); 6717 6718 if (net == NULL) { 6719 /* didn't find the requested primary address! */ 6720 return (-1); 6721 } else { 6722 /* set the primary address */ 6723 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6724 /* Must be confirmed, so queue to set */ 6725 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6726 return (0); 6727 } 6728 stcb->asoc.primary_destination = net; 6729 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6730 sctp_free_remote_addr(stcb->asoc.alternate); 6731 stcb->asoc.alternate = NULL; 6732 } 6733 net = TAILQ_FIRST(&stcb->asoc.nets); 6734 if (net != stcb->asoc.primary_destination) { 6735 /* 6736 * first one on the list is NOT the primary 6737 * sctp_cmpaddr() is much more efficient if the 6738 * primary is the first on the list, make it so. 6739 */ 6740 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6741 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6742 } 6743 return (0); 6744 } 6745 } 6746 6747 int 6748 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6749 { 6750 /* 6751 * This function serves two purposes. It will see if a TAG can be 6752 * re-used and return 1 for yes it is ok and 0 for don't use that 6753 * tag. A secondary function it will do is purge out old tags that 6754 * can be removed. 6755 */ 6756 struct sctpvtaghead *chain; 6757 struct sctp_tagblock *twait_block; 6758 struct sctpasochead *head; 6759 struct sctp_tcb *stcb; 6760 int i; 6761 6762 SCTP_INP_INFO_RLOCK(); 6763 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6764 SCTP_BASE_INFO(hashasocmark))]; 6765 LIST_FOREACH(stcb, head, sctp_asocs) { 6766 /* 6767 * We choose not to lock anything here. TCB's can't be 6768 * removed since we have the read lock, so they can't be 6769 * freed on us, same thing for the INP. I may be wrong with 6770 * this assumption, but we will go with it for now :-) 6771 */ 6772 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6773 continue; 6774 } 6775 if (stcb->asoc.my_vtag == tag) { 6776 /* candidate */ 6777 if (stcb->rport != rport) { 6778 continue; 6779 } 6780 if (stcb->sctp_ep->sctp_lport != lport) { 6781 continue; 6782 } 6783 /* Its a used tag set */ 6784 SCTP_INP_INFO_RUNLOCK(); 6785 return (0); 6786 } 6787 } 6788 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6789 /* Now what about timed wait ? */ 6790 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6791 /* 6792 * Block(s) are present, lets see if we have this tag in the 6793 * list 6794 */ 6795 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6796 if (twait_block->vtag_block[i].v_tag == 0) { 6797 /* not used */ 6798 continue; 6799 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6800 now->tv_sec) { 6801 /* Audit expires this guy */ 6802 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6803 twait_block->vtag_block[i].v_tag = 0; 6804 twait_block->vtag_block[i].lport = 0; 6805 twait_block->vtag_block[i].rport = 0; 6806 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6807 (twait_block->vtag_block[i].lport == lport) && 6808 (twait_block->vtag_block[i].rport == rport)) { 6809 /* Bad tag, sorry :< */ 6810 SCTP_INP_INFO_RUNLOCK(); 6811 return (0); 6812 } 6813 } 6814 } 6815 SCTP_INP_INFO_RUNLOCK(); 6816 return (1); 6817 } 6818 6819 static void 6820 sctp_drain_mbufs(struct sctp_tcb *stcb) 6821 { 6822 /* 6823 * We must hunt this association for MBUF's past the cumack (i.e. 6824 * out of order data that we can renege on). 6825 */ 6826 struct sctp_association *asoc; 6827 struct sctp_tmit_chunk *chk, *nchk; 6828 uint32_t cumulative_tsn_p1; 6829 struct sctp_queued_to_read *ctl, *nctl; 6830 int cnt, strmat; 6831 uint32_t gap, i; 6832 int fnd = 0; 6833 6834 /* We look for anything larger than the cum-ack + 1 */ 6835 6836 asoc = &stcb->asoc; 6837 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6838 /* none we can reneg on. */ 6839 return; 6840 } 6841 SCTP_STAT_INCR(sctps_protocol_drains_done); 6842 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6843 cnt = 0; 6844 /* First look in the re-assembly queue */ 6845 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6846 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6847 /* Yep it is above cum-ack */ 6848 cnt++; 6849 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6850 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6851 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6852 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6853 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6854 if (chk->data) { 6855 sctp_m_freem(chk->data); 6856 chk->data = NULL; 6857 } 6858 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6859 } 6860 } 6861 /* Ok that was fun, now we will drain all the inbound streams? */ 6862 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6863 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6864 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6865 /* Yep it is above cum-ack */ 6866 cnt++; 6867 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6868 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6869 sctp_ucount_decr(asoc->cnt_on_all_streams); 6870 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6871 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6872 if (ctl->data) { 6873 sctp_m_freem(ctl->data); 6874 ctl->data = NULL; 6875 } 6876 sctp_free_remote_addr(ctl->whoFrom); 6877 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6878 SCTP_DECR_READQ_COUNT(); 6879 } 6880 } 6881 } 6882 if (cnt) { 6883 /* We must back down to see what the new highest is */ 6884 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6885 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6886 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6887 asoc->highest_tsn_inside_map = i; 6888 fnd = 1; 6889 break; 6890 } 6891 } 6892 if (!fnd) { 6893 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6894 } 6895 /* 6896 * Question, should we go through the delivery queue? The 6897 * only reason things are on here is the app not reading OR 6898 * a p-d-api up. An attacker COULD send enough in to 6899 * initiate the PD-API and then send a bunch of stuff to 6900 * other streams... these would wind up on the delivery 6901 * queue.. and then we would not get to them. But in order 6902 * to do this I then have to back-track and un-deliver 6903 * sequence numbers in streams.. el-yucko. I think for now 6904 * we will NOT look at the delivery queue and leave it to be 6905 * something to consider later. An alternative would be to 6906 * abort the P-D-API with a notification and then deliver 6907 * the data.... Or another method might be to keep track of 6908 * how many times the situation occurs and if we see a 6909 * possible attack underway just abort the association. 6910 */ 6911 #ifdef SCTP_DEBUG 6912 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6913 #endif 6914 /* 6915 * Now do we need to find a new 6916 * asoc->highest_tsn_inside_map? 6917 */ 6918 asoc->last_revoke_count = cnt; 6919 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6920 /* sa_ignore NO_NULL_CHK */ 6921 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6922 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6923 } 6924 /* 6925 * Another issue, in un-setting the TSN's in the mapping array we 6926 * DID NOT adjust the highest_tsn marker. This will cause one of 6927 * two things to occur. It may cause us to do extra work in checking 6928 * for our mapping array movement. More importantly it may cause us 6929 * to SACK every datagram. This may not be a bad thing though since 6930 * we will recover once we get our cum-ack above and all this stuff 6931 * we dumped recovered. 6932 */ 6933 } 6934 6935 void 6936 sctp_drain() 6937 { 6938 /* 6939 * We must walk the PCB lists for ALL associations here. The system 6940 * is LOW on MBUF's and needs help. This is where reneging will 6941 * occur. We really hope this does NOT happen! 6942 */ 6943 VNET_ITERATOR_DECL(vnet_iter); 6944 VNET_LIST_RLOCK_NOSLEEP(); 6945 VNET_FOREACH(vnet_iter) { 6946 CURVNET_SET(vnet_iter); 6947 struct sctp_inpcb *inp; 6948 struct sctp_tcb *stcb; 6949 6950 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6951 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6952 #ifdef VIMAGE 6953 continue; 6954 #else 6955 return; 6956 #endif 6957 } 6958 SCTP_INP_INFO_RLOCK(); 6959 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6960 /* For each endpoint */ 6961 SCTP_INP_RLOCK(inp); 6962 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6963 /* For each association */ 6964 SCTP_TCB_LOCK(stcb); 6965 sctp_drain_mbufs(stcb); 6966 SCTP_TCB_UNLOCK(stcb); 6967 } 6968 SCTP_INP_RUNLOCK(inp); 6969 } 6970 SCTP_INP_INFO_RUNLOCK(); 6971 CURVNET_RESTORE(); 6972 } 6973 VNET_LIST_RUNLOCK_NOSLEEP(); 6974 } 6975 6976 /* 6977 * start a new iterator 6978 * iterates through all endpoints and associations based on the pcb_state 6979 * flags and asoc_state. "af" (mandatory) is executed for all matching 6980 * assocs and "ef" (optional) is executed when the iterator completes. 6981 * "inpf" (optional) is executed for each new endpoint as it is being 6982 * iterated through. inpe (optional) is called when the inp completes 6983 * its way through all the stcbs. 6984 */ 6985 int 6986 sctp_initiate_iterator(inp_func inpf, 6987 asoc_func af, 6988 inp_func inpe, 6989 uint32_t pcb_state, 6990 uint32_t pcb_features, 6991 uint32_t asoc_state, 6992 void *argp, 6993 uint32_t argi, 6994 end_func ef, 6995 struct sctp_inpcb *s_inp, 6996 uint8_t chunk_output_off) 6997 { 6998 struct sctp_iterator *it = NULL; 6999 7000 if (af == NULL) { 7001 return (-1); 7002 } 7003 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7004 SCTP_M_ITER); 7005 if (it == NULL) { 7006 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7007 return (ENOMEM); 7008 } 7009 memset(it, 0, sizeof(*it)); 7010 it->function_assoc = af; 7011 it->function_inp = inpf; 7012 if (inpf) 7013 it->done_current_ep = 0; 7014 else 7015 it->done_current_ep = 1; 7016 it->function_atend = ef; 7017 it->pointer = argp; 7018 it->val = argi; 7019 it->pcb_flags = pcb_state; 7020 it->pcb_features = pcb_features; 7021 it->asoc_state = asoc_state; 7022 it->function_inp_end = inpe; 7023 it->no_chunk_output = chunk_output_off; 7024 it->vn = curvnet; 7025 if (s_inp) { 7026 /* Assume lock is held here */ 7027 it->inp = s_inp; 7028 SCTP_INP_INCR_REF(it->inp); 7029 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7030 } else { 7031 SCTP_INP_INFO_RLOCK(); 7032 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7033 if (it->inp) { 7034 SCTP_INP_INCR_REF(it->inp); 7035 } 7036 SCTP_INP_INFO_RUNLOCK(); 7037 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7038 7039 } 7040 SCTP_IPI_ITERATOR_WQ_LOCK(); 7041 7042 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7043 if (sctp_it_ctl.iterator_running == 0) { 7044 sctp_wakeup_iterator(); 7045 } 7046 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7047 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7048 return (0); 7049 } 7050