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", __FUNCTION__); 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 __FUNCTION__); 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; 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 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1881 SCTP_BASE_INFO(hashmark))]; 1882 /* Kick out all non-listeners to the TCP hash */ 1883 LIST_FOREACH(tinp, head, sctp_hash) { 1884 if (tinp->sctp_lport != inp->sctp_lport) { 1885 continue; 1886 } 1887 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1888 continue; 1889 } 1890 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1891 continue; 1892 } 1893 if (tinp->sctp_socket->so_qlimit) { 1894 continue; 1895 } 1896 SCTP_INP_WLOCK(tinp); 1897 LIST_REMOVE(tinp, sctp_hash); 1898 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1899 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1900 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1901 SCTP_INP_WUNLOCK(tinp); 1902 } 1903 SCTP_INP_WLOCK(inp); 1904 /* Pull from where he was */ 1905 LIST_REMOVE(inp, sctp_hash); 1906 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1907 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1908 LIST_INSERT_HEAD(head, inp, sctp_hash); 1909 SCTP_INP_WUNLOCK(inp); 1910 SCTP_INP_RLOCK(inp); 1911 return (0); 1912 } 1913 1914 1915 struct sctp_inpcb * 1916 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1917 uint32_t vrf_id) 1918 { 1919 /* 1920 * First we check the hash table to see if someone has this port 1921 * bound with just the port. 1922 */ 1923 struct sctp_inpcb *inp; 1924 struct sctppcbhead *head; 1925 int lport; 1926 unsigned int i; 1927 1928 #ifdef INET 1929 struct sockaddr_in *sin; 1930 1931 #endif 1932 #ifdef INET6 1933 struct sockaddr_in6 *sin6; 1934 1935 #endif 1936 1937 switch (nam->sa_family) { 1938 #ifdef INET 1939 case AF_INET: 1940 sin = (struct sockaddr_in *)nam; 1941 lport = sin->sin_port; 1942 break; 1943 #endif 1944 #ifdef INET6 1945 case AF_INET6: 1946 sin6 = (struct sockaddr_in6 *)nam; 1947 lport = sin6->sin6_port; 1948 break; 1949 #endif 1950 default: 1951 return (NULL); 1952 } 1953 /* 1954 * I could cheat here and just cast to one of the types but we will 1955 * do it right. It also provides the check against an Unsupported 1956 * type too. 1957 */ 1958 /* Find the head of the ALLADDR chain */ 1959 if (have_lock == 0) { 1960 SCTP_INP_INFO_RLOCK(); 1961 } 1962 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1963 SCTP_BASE_INFO(hashmark))]; 1964 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1965 1966 /* 1967 * If the TCP model exists it could be that the main listening 1968 * endpoint is gone but there still exists a connected socket for 1969 * this guy. If so we can return the first one that we find. This 1970 * may NOT be the correct one so the caller should be wary on the 1971 * returned INP. Currently the only caller that sets find_tcp_pool 1972 * is in bindx where we are verifying that a user CAN bind the 1973 * address. He either has bound it already, or someone else has, or 1974 * its open to bind, so this is good enough. 1975 */ 1976 if (inp == NULL && find_tcp_pool) { 1977 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1978 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1979 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1980 if (inp) { 1981 break; 1982 } 1983 } 1984 } 1985 if (inp) { 1986 SCTP_INP_INCR_REF(inp); 1987 } 1988 if (have_lock == 0) { 1989 SCTP_INP_INFO_RUNLOCK(); 1990 } 1991 return (inp); 1992 } 1993 1994 1995 /* 1996 * Find an association for an endpoint with the pointer to whom you want to 1997 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1998 * need to change the *to to some other struct like a mbuf... 1999 */ 2000 struct sctp_tcb * 2001 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2002 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2003 uint32_t vrf_id) 2004 { 2005 struct sctp_inpcb *inp = NULL; 2006 struct sctp_tcb *stcb; 2007 2008 SCTP_INP_INFO_RLOCK(); 2009 if (find_tcp_pool) { 2010 if (inp_p != NULL) { 2011 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2012 vrf_id); 2013 } else { 2014 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2015 vrf_id); 2016 } 2017 if (stcb != NULL) { 2018 SCTP_INP_INFO_RUNLOCK(); 2019 return (stcb); 2020 } 2021 } 2022 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2023 if (inp_p != NULL) { 2024 *inp_p = inp; 2025 } 2026 SCTP_INP_INFO_RUNLOCK(); 2027 if (inp == NULL) { 2028 return (NULL); 2029 } 2030 /* 2031 * ok, we have an endpoint, now lets find the assoc for it (if any) 2032 * we now place the source address or from in the to of the find 2033 * endpoint call. Since in reality this chain is used from the 2034 * inbound packet side. 2035 */ 2036 if (inp_p != NULL) { 2037 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2038 NULL); 2039 } else { 2040 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2041 NULL); 2042 } 2043 return (stcb); 2044 } 2045 2046 2047 /* 2048 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2049 * find all addresses that the sender has specified in any address list. Each 2050 * address will be used to lookup the TCB and see if one exits. 2051 */ 2052 static struct sctp_tcb * 2053 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2054 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2055 struct sockaddr *dst) 2056 { 2057 struct sctp_paramhdr *phdr, parm_buf; 2058 2059 #if defined(INET) || defined(INET6) 2060 struct sctp_tcb *stcb; 2061 uint16_t ptype; 2062 2063 #endif 2064 uint16_t plen; 2065 2066 #ifdef INET 2067 struct sockaddr_in sin4; 2068 2069 #endif 2070 #ifdef INET6 2071 struct sockaddr_in6 sin6; 2072 2073 #endif 2074 2075 #ifdef INET 2076 memset(&sin4, 0, sizeof(sin4)); 2077 sin4.sin_len = sizeof(sin4); 2078 sin4.sin_family = AF_INET; 2079 sin4.sin_port = sh->src_port; 2080 #endif 2081 #ifdef INET6 2082 memset(&sin6, 0, sizeof(sin6)); 2083 sin6.sin6_len = sizeof(sin6); 2084 sin6.sin6_family = AF_INET6; 2085 sin6.sin6_port = sh->src_port; 2086 #endif 2087 2088 offset += sizeof(struct sctp_init_chunk); 2089 2090 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2091 while (phdr != NULL) { 2092 /* now we must see if we want the parameter */ 2093 #if defined(INET) || defined(INET6) 2094 ptype = ntohs(phdr->param_type); 2095 #endif 2096 plen = ntohs(phdr->param_length); 2097 if (plen == 0) { 2098 break; 2099 } 2100 #ifdef INET 2101 if (ptype == SCTP_IPV4_ADDRESS && 2102 plen == sizeof(struct sctp_ipv4addr_param)) { 2103 /* Get the rest of the address */ 2104 struct sctp_ipv4addr_param ip4_parm, *p4; 2105 2106 phdr = sctp_get_next_param(m, offset, 2107 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2108 if (phdr == NULL) { 2109 return (NULL); 2110 } 2111 p4 = (struct sctp_ipv4addr_param *)phdr; 2112 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2113 /* look it up */ 2114 stcb = sctp_findassociation_ep_addr(inp_p, 2115 (struct sockaddr *)&sin4, netp, dst, NULL); 2116 if (stcb != NULL) { 2117 return (stcb); 2118 } 2119 } 2120 #endif 2121 #ifdef INET6 2122 if (ptype == SCTP_IPV6_ADDRESS && 2123 plen == sizeof(struct sctp_ipv6addr_param)) { 2124 /* Get the rest of the address */ 2125 struct sctp_ipv6addr_param ip6_parm, *p6; 2126 2127 phdr = sctp_get_next_param(m, offset, 2128 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2129 if (phdr == NULL) { 2130 return (NULL); 2131 } 2132 p6 = (struct sctp_ipv6addr_param *)phdr; 2133 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2134 /* look it up */ 2135 stcb = sctp_findassociation_ep_addr(inp_p, 2136 (struct sockaddr *)&sin6, netp, dst, NULL); 2137 if (stcb != NULL) { 2138 return (stcb); 2139 } 2140 } 2141 #endif 2142 offset += SCTP_SIZE32(plen); 2143 phdr = sctp_get_next_param(m, offset, &parm_buf, 2144 sizeof(parm_buf)); 2145 } 2146 return (NULL); 2147 } 2148 2149 static struct sctp_tcb * 2150 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2151 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2152 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2153 { 2154 /* 2155 * Use my vtag to hash. If we find it we then verify the source addr 2156 * is in the assoc. If all goes well we save a bit on rec of a 2157 * packet. 2158 */ 2159 struct sctpasochead *head; 2160 struct sctp_nets *net; 2161 struct sctp_tcb *stcb; 2162 2163 SCTP_INP_INFO_RLOCK(); 2164 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2165 SCTP_BASE_INFO(hashasocmark))]; 2166 LIST_FOREACH(stcb, head, sctp_asocs) { 2167 SCTP_INP_RLOCK(stcb->sctp_ep); 2168 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2169 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2170 continue; 2171 } 2172 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2173 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2174 continue; 2175 } 2176 SCTP_TCB_LOCK(stcb); 2177 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2178 if (stcb->asoc.my_vtag == vtag) { 2179 /* candidate */ 2180 if (stcb->rport != rport) { 2181 SCTP_TCB_UNLOCK(stcb); 2182 continue; 2183 } 2184 if (stcb->sctp_ep->sctp_lport != lport) { 2185 SCTP_TCB_UNLOCK(stcb); 2186 continue; 2187 } 2188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2189 SCTP_TCB_UNLOCK(stcb); 2190 continue; 2191 } 2192 /* RRS:Need toaddr check here */ 2193 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2194 /* Endpoint does not own this address */ 2195 SCTP_TCB_UNLOCK(stcb); 2196 continue; 2197 } 2198 if (remote_tag) { 2199 /* 2200 * If we have both vtags that's all we match 2201 * on 2202 */ 2203 if (stcb->asoc.peer_vtag == remote_tag) { 2204 /* 2205 * If both tags match we consider it 2206 * conclusive and check NO 2207 * source/destination addresses 2208 */ 2209 goto conclusive; 2210 } 2211 } 2212 if (skip_src_check) { 2213 conclusive: 2214 if (from) { 2215 *netp = sctp_findnet(stcb, from); 2216 } else { 2217 *netp = NULL; /* unknown */ 2218 } 2219 if (inp_p) 2220 *inp_p = stcb->sctp_ep; 2221 SCTP_INP_INFO_RUNLOCK(); 2222 return (stcb); 2223 } 2224 net = sctp_findnet(stcb, from); 2225 if (net) { 2226 /* yep its him. */ 2227 *netp = net; 2228 SCTP_STAT_INCR(sctps_vtagexpress); 2229 *inp_p = stcb->sctp_ep; 2230 SCTP_INP_INFO_RUNLOCK(); 2231 return (stcb); 2232 } else { 2233 /* 2234 * not him, this should only happen in rare 2235 * cases so I peg it. 2236 */ 2237 SCTP_STAT_INCR(sctps_vtagbogus); 2238 } 2239 } 2240 SCTP_TCB_UNLOCK(stcb); 2241 } 2242 SCTP_INP_INFO_RUNLOCK(); 2243 return (NULL); 2244 } 2245 2246 2247 /* 2248 * Find an association with the pointer to the inbound IP packet. This can be 2249 * a IPv4 or IPv6 packet. 2250 */ 2251 struct sctp_tcb * 2252 sctp_findassociation_addr(struct mbuf *m, int offset, 2253 struct sockaddr *src, struct sockaddr *dst, 2254 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2255 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2256 { 2257 int find_tcp_pool; 2258 struct sctp_tcb *stcb; 2259 struct sctp_inpcb *inp; 2260 2261 if (sh->v_tag) { 2262 /* we only go down this path if vtag is non-zero */ 2263 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2264 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2265 if (stcb) { 2266 return (stcb); 2267 } 2268 } 2269 find_tcp_pool = 0; 2270 if ((ch->chunk_type != SCTP_INITIATION) && 2271 (ch->chunk_type != SCTP_INITIATION_ACK) && 2272 (ch->chunk_type != SCTP_COOKIE_ACK) && 2273 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2274 /* Other chunk types go to the tcp pool. */ 2275 find_tcp_pool = 1; 2276 } 2277 if (inp_p) { 2278 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2279 find_tcp_pool, vrf_id); 2280 inp = *inp_p; 2281 } else { 2282 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2283 find_tcp_pool, vrf_id); 2284 } 2285 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2286 if (stcb == NULL && inp) { 2287 /* Found a EP but not this address */ 2288 if ((ch->chunk_type == SCTP_INITIATION) || 2289 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2290 /*- 2291 * special hook, we do NOT return linp or an 2292 * association that is linked to an existing 2293 * association that is under the TCP pool (i.e. no 2294 * listener exists). The endpoint finding routine 2295 * will always find a listener before examining the 2296 * TCP pool. 2297 */ 2298 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2299 if (inp_p) { 2300 *inp_p = NULL; 2301 } 2302 return (NULL); 2303 } 2304 stcb = sctp_findassociation_special_addr(m, 2305 offset, sh, &inp, netp, dst); 2306 if (inp_p != NULL) { 2307 *inp_p = inp; 2308 } 2309 } 2310 } 2311 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2312 return (stcb); 2313 } 2314 2315 /* 2316 * lookup an association by an ASCONF lookup address. 2317 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2318 */ 2319 struct sctp_tcb * 2320 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2321 struct sockaddr *dst, struct sctphdr *sh, 2322 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2323 { 2324 struct sctp_tcb *stcb; 2325 union sctp_sockstore remote_store; 2326 struct sctp_paramhdr parm_buf, *phdr; 2327 int ptype; 2328 int zero_address = 0; 2329 2330 #ifdef INET 2331 struct sockaddr_in *sin; 2332 2333 #endif 2334 #ifdef INET6 2335 struct sockaddr_in6 *sin6; 2336 2337 #endif 2338 2339 memset(&remote_store, 0, sizeof(remote_store)); 2340 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2341 &parm_buf, sizeof(struct sctp_paramhdr)); 2342 if (phdr == NULL) { 2343 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2344 __FUNCTION__); 2345 return NULL; 2346 } 2347 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2348 /* get the correlation address */ 2349 switch (ptype) { 2350 #ifdef INET6 2351 case SCTP_IPV6_ADDRESS: 2352 { 2353 /* ipv6 address param */ 2354 struct sctp_ipv6addr_param *p6, p6_buf; 2355 2356 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2357 return NULL; 2358 } 2359 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2360 offset + sizeof(struct sctp_asconf_chunk), 2361 &p6_buf.ph, sizeof(*p6)); 2362 if (p6 == NULL) { 2363 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2364 __FUNCTION__); 2365 return (NULL); 2366 } 2367 sin6 = &remote_store.sin6; 2368 sin6->sin6_family = AF_INET6; 2369 sin6->sin6_len = sizeof(*sin6); 2370 sin6->sin6_port = sh->src_port; 2371 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2372 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2373 zero_address = 1; 2374 break; 2375 } 2376 #endif 2377 #ifdef INET 2378 case SCTP_IPV4_ADDRESS: 2379 { 2380 /* ipv4 address param */ 2381 struct sctp_ipv4addr_param *p4, p4_buf; 2382 2383 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2384 return NULL; 2385 } 2386 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2387 offset + sizeof(struct sctp_asconf_chunk), 2388 &p4_buf.ph, sizeof(*p4)); 2389 if (p4 == NULL) { 2390 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2391 __FUNCTION__); 2392 return (NULL); 2393 } 2394 sin = &remote_store.sin; 2395 sin->sin_family = AF_INET; 2396 sin->sin_len = sizeof(*sin); 2397 sin->sin_port = sh->src_port; 2398 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2399 if (sin->sin_addr.s_addr == INADDR_ANY) 2400 zero_address = 1; 2401 break; 2402 } 2403 #endif 2404 default: 2405 /* invalid address param type */ 2406 return NULL; 2407 } 2408 2409 if (zero_address) { 2410 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2411 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2412 if (stcb != NULL) { 2413 SCTP_INP_DECR_REF(*inp_p); 2414 } 2415 } else { 2416 stcb = sctp_findassociation_ep_addr(inp_p, 2417 &remote_store.sa, netp, 2418 dst, NULL); 2419 } 2420 return (stcb); 2421 } 2422 2423 2424 /* 2425 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2426 * addresses. This way if we don't get a bind we by default pick a ephemeral 2427 * port with all addresses bound. 2428 */ 2429 int 2430 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2431 { 2432 /* 2433 * we get called when a new endpoint starts up. We need to allocate 2434 * the sctp_inpcb structure from the zone and init it. Mark it as 2435 * unbound and find a port that we can use as an ephemeral with 2436 * INADDR_ANY. If the user binds later no problem we can then add in 2437 * the specific addresses. And setup the default parameters for the 2438 * EP. 2439 */ 2440 int i, error; 2441 struct sctp_inpcb *inp; 2442 struct sctp_pcb *m; 2443 struct timeval time; 2444 sctp_sharedkey_t *null_key; 2445 2446 error = 0; 2447 2448 SCTP_INP_INFO_WLOCK(); 2449 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2450 if (inp == NULL) { 2451 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2452 SCTP_INP_INFO_WUNLOCK(); 2453 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2454 return (ENOBUFS); 2455 } 2456 /* zap it */ 2457 bzero(inp, sizeof(*inp)); 2458 2459 /* bump generations */ 2460 /* setup socket pointers */ 2461 inp->sctp_socket = so; 2462 inp->ip_inp.inp.inp_socket = so; 2463 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2464 #ifdef INET6 2465 if (INP_SOCKAF(so) == AF_INET6) { 2466 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2467 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2468 } 2469 if (MODULE_GLOBAL(ip6_v6only)) { 2470 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2471 } 2472 } 2473 #endif 2474 inp->sctp_associd_counter = 1; 2475 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2476 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2477 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2478 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2479 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2480 inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable); 2481 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2482 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2483 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2484 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2485 /* init the small hash table we use to track asocid <-> tcb */ 2486 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2487 if (inp->sctp_asocidhash == NULL) { 2488 crfree(inp->ip_inp.inp.inp_cred); 2489 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2490 SCTP_INP_INFO_WUNLOCK(); 2491 return (ENOBUFS); 2492 } 2493 #ifdef IPSEC 2494 { 2495 struct inpcbpolicy *pcb_sp = NULL; 2496 2497 error = ipsec_init_policy(so, &pcb_sp); 2498 /* Arrange to share the policy */ 2499 inp->ip_inp.inp.inp_sp = pcb_sp; 2500 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2501 } 2502 if (error != 0) { 2503 crfree(inp->ip_inp.inp.inp_cred); 2504 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2505 SCTP_INP_INFO_WUNLOCK(); 2506 return error; 2507 } 2508 #endif /* IPSEC */ 2509 SCTP_INCR_EP_COUNT(); 2510 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2511 SCTP_INP_INFO_WUNLOCK(); 2512 2513 so->so_pcb = (caddr_t)inp; 2514 2515 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2516 /* UDP style socket */ 2517 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2518 SCTP_PCB_FLAGS_UNBOUND); 2519 /* Be sure it is NON-BLOCKING IO for UDP */ 2520 /* SCTP_SET_SO_NBIO(so); */ 2521 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2522 /* TCP style socket */ 2523 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2524 SCTP_PCB_FLAGS_UNBOUND); 2525 /* Be sure we have blocking IO by default */ 2526 SCTP_CLEAR_SO_NBIO(so); 2527 } else { 2528 /* 2529 * unsupported socket type (RAW, etc)- in case we missed it 2530 * in protosw 2531 */ 2532 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2533 so->so_pcb = NULL; 2534 crfree(inp->ip_inp.inp.inp_cred); 2535 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2536 return (EOPNOTSUPP); 2537 } 2538 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2539 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2540 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2541 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2542 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2543 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2544 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2545 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2546 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2547 } 2548 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2549 &inp->sctp_hashmark); 2550 if (inp->sctp_tcbhash == NULL) { 2551 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2552 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2553 so->so_pcb = NULL; 2554 crfree(inp->ip_inp.inp.inp_cred); 2555 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2556 return (ENOBUFS); 2557 } 2558 inp->def_vrf_id = vrf_id; 2559 2560 SCTP_INP_INFO_WLOCK(); 2561 SCTP_INP_LOCK_INIT(inp); 2562 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2563 SCTP_INP_READ_INIT(inp); 2564 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2565 /* lock the new ep */ 2566 SCTP_INP_WLOCK(inp); 2567 2568 /* add it to the info area */ 2569 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2570 SCTP_INP_INFO_WUNLOCK(); 2571 2572 TAILQ_INIT(&inp->read_queue); 2573 LIST_INIT(&inp->sctp_addr_list); 2574 2575 LIST_INIT(&inp->sctp_asoc_list); 2576 2577 #ifdef SCTP_TRACK_FREED_ASOCS 2578 /* TEMP CODE */ 2579 LIST_INIT(&inp->sctp_asoc_free_list); 2580 #endif 2581 /* Init the timer structure for signature change */ 2582 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2583 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2584 2585 /* now init the actual endpoint default data */ 2586 m = &inp->sctp_ep; 2587 2588 /* setup the base timeout information */ 2589 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2590 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2591 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2592 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2593 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2594 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2595 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2596 /* all max/min max are in ms */ 2597 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2598 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2599 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2600 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2601 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2602 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2603 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2604 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2605 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2606 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2607 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2608 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2609 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2610 2611 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2612 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2613 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2614 /* number of streams to pre-open on a association */ 2615 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2616 2617 /* Add adaptation cookie */ 2618 m->adaptation_layer_indicator = 0; 2619 m->adaptation_layer_indicator_provided = 0; 2620 2621 /* seed random number generator */ 2622 m->random_counter = 1; 2623 m->store_at = SCTP_SIGNATURE_SIZE; 2624 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2625 sctp_fill_random_store(m); 2626 2627 /* Minimum cookie size */ 2628 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2629 sizeof(struct sctp_state_cookie); 2630 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2631 2632 /* Setup the initial secret */ 2633 (void)SCTP_GETTIME_TIMEVAL(&time); 2634 m->time_of_secret_change = time.tv_sec; 2635 2636 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2637 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2638 } 2639 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2640 2641 /* How long is a cookie good for ? */ 2642 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2643 /* 2644 * Initialize authentication parameters 2645 */ 2646 m->local_hmacs = sctp_default_supported_hmaclist(); 2647 m->local_auth_chunks = sctp_alloc_chunklist(); 2648 if (inp->asconf_supported) { 2649 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2650 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2651 } 2652 m->default_dscp = 0; 2653 #ifdef INET6 2654 m->default_flowlabel = 0; 2655 #endif 2656 m->port = 0; /* encapsulation disabled by default */ 2657 LIST_INIT(&m->shared_keys); 2658 /* add default NULL key as key id 0 */ 2659 null_key = sctp_alloc_sharedkey(); 2660 sctp_insert_sharedkey(&m->shared_keys, null_key); 2661 SCTP_INP_WUNLOCK(inp); 2662 #ifdef SCTP_LOG_CLOSING 2663 sctp_log_closing(inp, NULL, 12); 2664 #endif 2665 return (error); 2666 } 2667 2668 2669 void 2670 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2671 struct sctp_tcb *stcb) 2672 { 2673 struct sctp_nets *net; 2674 uint16_t lport, rport; 2675 struct sctppcbhead *head; 2676 struct sctp_laddr *laddr, *oladdr; 2677 2678 atomic_add_int(&stcb->asoc.refcnt, 1); 2679 SCTP_TCB_UNLOCK(stcb); 2680 SCTP_INP_INFO_WLOCK(); 2681 SCTP_INP_WLOCK(old_inp); 2682 SCTP_INP_WLOCK(new_inp); 2683 SCTP_TCB_LOCK(stcb); 2684 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2685 2686 new_inp->sctp_ep.time_of_secret_change = 2687 old_inp->sctp_ep.time_of_secret_change; 2688 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2689 sizeof(old_inp->sctp_ep.secret_key)); 2690 new_inp->sctp_ep.current_secret_number = 2691 old_inp->sctp_ep.current_secret_number; 2692 new_inp->sctp_ep.last_secret_number = 2693 old_inp->sctp_ep.last_secret_number; 2694 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2695 2696 /* make it so new data pours into the new socket */ 2697 stcb->sctp_socket = new_inp->sctp_socket; 2698 stcb->sctp_ep = new_inp; 2699 2700 /* Copy the port across */ 2701 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2702 rport = stcb->rport; 2703 /* Pull the tcb from the old association */ 2704 LIST_REMOVE(stcb, sctp_tcbhash); 2705 LIST_REMOVE(stcb, sctp_tcblist); 2706 if (stcb->asoc.in_asocid_hash) { 2707 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2708 } 2709 /* Now insert the new_inp into the TCP connected hash */ 2710 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2711 2712 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2713 /* Its safe to access */ 2714 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2715 2716 /* Now move the tcb into the endpoint list */ 2717 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2718 /* 2719 * Question, do we even need to worry about the ep-hash since we 2720 * only have one connection? Probably not :> so lets get rid of it 2721 * and not suck up any kernel memory in that. 2722 */ 2723 if (stcb->asoc.in_asocid_hash) { 2724 struct sctpasochead *lhd; 2725 2726 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2727 new_inp->hashasocidmark)]; 2728 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2729 } 2730 /* Ok. Let's restart timer. */ 2731 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2732 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2733 stcb, net); 2734 } 2735 2736 SCTP_INP_INFO_WUNLOCK(); 2737 if (new_inp->sctp_tcbhash != NULL) { 2738 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2739 new_inp->sctp_tcbhash = NULL; 2740 } 2741 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2742 /* Subset bound, so copy in the laddr list from the old_inp */ 2743 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2744 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2745 if (laddr == NULL) { 2746 /* 2747 * Gak, what can we do? This assoc is really 2748 * HOSED. We probably should send an abort 2749 * here. 2750 */ 2751 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2752 continue; 2753 } 2754 SCTP_INCR_LADDR_COUNT(); 2755 bzero(laddr, sizeof(*laddr)); 2756 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2757 laddr->ifa = oladdr->ifa; 2758 atomic_add_int(&laddr->ifa->refcount, 1); 2759 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2760 sctp_nxt_addr); 2761 new_inp->laddr_count++; 2762 if (oladdr == stcb->asoc.last_used_address) { 2763 stcb->asoc.last_used_address = laddr; 2764 } 2765 } 2766 } 2767 /* 2768 * Now any running timers need to be adjusted since we really don't 2769 * care if they are running or not just blast in the new_inp into 2770 * all of them. 2771 */ 2772 2773 stcb->asoc.dack_timer.ep = (void *)new_inp; 2774 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2775 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2776 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2777 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2778 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2779 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2780 /* now what about the nets? */ 2781 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2782 net->pmtu_timer.ep = (void *)new_inp; 2783 net->hb_timer.ep = (void *)new_inp; 2784 net->rxt_timer.ep = (void *)new_inp; 2785 } 2786 SCTP_INP_WUNLOCK(new_inp); 2787 SCTP_INP_WUNLOCK(old_inp); 2788 } 2789 2790 2791 2792 2793 /* sctp_ifap is used to bypass normal local address validation checks */ 2794 int 2795 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2796 struct sctp_ifa *sctp_ifap, struct thread *p) 2797 { 2798 /* bind a ep to a socket address */ 2799 struct sctppcbhead *head; 2800 struct sctp_inpcb *inp, *inp_tmp; 2801 struct inpcb *ip_inp; 2802 int port_reuse_active = 0; 2803 int bindall; 2804 uint16_t lport; 2805 int error; 2806 uint32_t vrf_id; 2807 2808 lport = 0; 2809 bindall = 1; 2810 inp = (struct sctp_inpcb *)so->so_pcb; 2811 ip_inp = (struct inpcb *)so->so_pcb; 2812 #ifdef SCTP_DEBUG 2813 if (addr) { 2814 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2815 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2816 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2817 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2818 } 2819 #endif 2820 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2821 /* already did a bind, subsequent binds NOT allowed ! */ 2822 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2823 return (EINVAL); 2824 } 2825 #ifdef INVARIANTS 2826 if (p == NULL) 2827 panic("null proc/thread"); 2828 #endif 2829 if (addr != NULL) { 2830 switch (addr->sa_family) { 2831 #ifdef INET 2832 case AF_INET: 2833 { 2834 struct sockaddr_in *sin; 2835 2836 /* IPV6_V6ONLY socket? */ 2837 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2838 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2839 return (EINVAL); 2840 } 2841 if (addr->sa_len != sizeof(*sin)) { 2842 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2843 return (EINVAL); 2844 } 2845 sin = (struct sockaddr_in *)addr; 2846 lport = sin->sin_port; 2847 /* 2848 * For LOOPBACK the prison_local_ip4() call 2849 * will transmute the ip address to the 2850 * proper value. 2851 */ 2852 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2853 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2854 return (error); 2855 } 2856 if (sin->sin_addr.s_addr != INADDR_ANY) { 2857 bindall = 0; 2858 } 2859 break; 2860 } 2861 #endif 2862 #ifdef INET6 2863 case AF_INET6: 2864 { 2865 /* 2866 * Only for pure IPv6 Address. (No IPv4 2867 * Mapped!) 2868 */ 2869 struct sockaddr_in6 *sin6; 2870 2871 sin6 = (struct sockaddr_in6 *)addr; 2872 2873 if (addr->sa_len != sizeof(*sin6)) { 2874 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2875 return (EINVAL); 2876 } 2877 lport = sin6->sin6_port; 2878 /* 2879 * For LOOPBACK the prison_local_ip6() call 2880 * will transmute the ipv6 address to the 2881 * proper value. 2882 */ 2883 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2884 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2885 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2886 return (error); 2887 } 2888 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2889 bindall = 0; 2890 /* KAME hack: embed scopeid */ 2891 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2892 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2893 return (EINVAL); 2894 } 2895 } 2896 /* this must be cleared for ifa_ifwithaddr() */ 2897 sin6->sin6_scope_id = 0; 2898 break; 2899 } 2900 #endif 2901 default: 2902 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2903 return (EAFNOSUPPORT); 2904 } 2905 } 2906 SCTP_INP_INFO_WLOCK(); 2907 SCTP_INP_WLOCK(inp); 2908 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2909 vrf_id = inp->def_vrf_id; 2910 2911 /* increase our count due to the unlock we do */ 2912 SCTP_INP_INCR_REF(inp); 2913 if (lport) { 2914 /* 2915 * Did the caller specify a port? if so we must see if an ep 2916 * already has this one bound. 2917 */ 2918 /* got to be root to get at low ports */ 2919 if (ntohs(lport) < IPPORT_RESERVED) { 2920 if (p && (error = 2921 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2922 )) { 2923 SCTP_INP_DECR_REF(inp); 2924 SCTP_INP_WUNLOCK(inp); 2925 SCTP_INP_INFO_WUNLOCK(); 2926 return (error); 2927 } 2928 } 2929 SCTP_INP_WUNLOCK(inp); 2930 if (bindall) { 2931 vrf_id = inp->def_vrf_id; 2932 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2933 if (inp_tmp != NULL) { 2934 /* 2935 * lock guy returned and lower count note 2936 * that we are not bound so inp_tmp should 2937 * NEVER be inp. And it is this inp 2938 * (inp_tmp) that gets the reference bump, 2939 * so we must lower it. 2940 */ 2941 SCTP_INP_DECR_REF(inp_tmp); 2942 /* unlock info */ 2943 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2944 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2945 /* 2946 * Ok, must be one-2-one and 2947 * allowing port re-use 2948 */ 2949 port_reuse_active = 1; 2950 goto continue_anyway; 2951 } 2952 SCTP_INP_DECR_REF(inp); 2953 SCTP_INP_INFO_WUNLOCK(); 2954 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2955 return (EADDRINUSE); 2956 } 2957 } else { 2958 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2959 if (inp_tmp != NULL) { 2960 /* 2961 * lock guy returned and lower count note 2962 * that we are not bound so inp_tmp should 2963 * NEVER be inp. And it is this inp 2964 * (inp_tmp) that gets the reference bump, 2965 * so we must lower it. 2966 */ 2967 SCTP_INP_DECR_REF(inp_tmp); 2968 /* unlock info */ 2969 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2970 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2971 /* 2972 * Ok, must be one-2-one and 2973 * allowing port re-use 2974 */ 2975 port_reuse_active = 1; 2976 goto continue_anyway; 2977 } 2978 SCTP_INP_DECR_REF(inp); 2979 SCTP_INP_INFO_WUNLOCK(); 2980 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2981 return (EADDRINUSE); 2982 } 2983 } 2984 continue_anyway: 2985 SCTP_INP_WLOCK(inp); 2986 if (bindall) { 2987 /* verify that no lport is not used by a singleton */ 2988 if ((port_reuse_active == 0) && 2989 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2990 /* Sorry someone already has this one bound */ 2991 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2992 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2993 port_reuse_active = 1; 2994 } else { 2995 SCTP_INP_DECR_REF(inp); 2996 SCTP_INP_WUNLOCK(inp); 2997 SCTP_INP_INFO_WUNLOCK(); 2998 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2999 return (EADDRINUSE); 3000 } 3001 } 3002 } 3003 } else { 3004 uint16_t first, last, candidate; 3005 uint16_t count; 3006 int done; 3007 3008 if (ip_inp->inp_flags & INP_HIGHPORT) { 3009 first = MODULE_GLOBAL(ipport_hifirstauto); 3010 last = MODULE_GLOBAL(ipport_hilastauto); 3011 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3012 if (p && (error = 3013 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3014 )) { 3015 SCTP_INP_DECR_REF(inp); 3016 SCTP_INP_WUNLOCK(inp); 3017 SCTP_INP_INFO_WUNLOCK(); 3018 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3019 return (error); 3020 } 3021 first = MODULE_GLOBAL(ipport_lowfirstauto); 3022 last = MODULE_GLOBAL(ipport_lowlastauto); 3023 } else { 3024 first = MODULE_GLOBAL(ipport_firstauto); 3025 last = MODULE_GLOBAL(ipport_lastauto); 3026 } 3027 if (first > last) { 3028 uint16_t temp; 3029 3030 temp = first; 3031 first = last; 3032 last = temp; 3033 } 3034 count = last - first + 1; /* number of candidates */ 3035 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3036 3037 done = 0; 3038 while (!done) { 3039 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3040 done = 1; 3041 } 3042 if (!done) { 3043 if (--count == 0) { 3044 SCTP_INP_DECR_REF(inp); 3045 SCTP_INP_WUNLOCK(inp); 3046 SCTP_INP_INFO_WUNLOCK(); 3047 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3048 return (EADDRINUSE); 3049 } 3050 if (candidate == last) 3051 candidate = first; 3052 else 3053 candidate = candidate + 1; 3054 } 3055 } 3056 lport = htons(candidate); 3057 } 3058 SCTP_INP_DECR_REF(inp); 3059 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3060 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3061 /* 3062 * this really should not happen. The guy did a non-blocking 3063 * bind and then did a close at the same time. 3064 */ 3065 SCTP_INP_WUNLOCK(inp); 3066 SCTP_INP_INFO_WUNLOCK(); 3067 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3068 return (EINVAL); 3069 } 3070 /* ok we look clear to give out this port, so lets setup the binding */ 3071 if (bindall) { 3072 /* binding to all addresses, so just set in the proper flags */ 3073 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3074 /* set the automatic addr changes from kernel flag */ 3075 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3076 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3077 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3078 } else { 3079 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3080 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3081 } 3082 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3083 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3084 } else { 3085 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3086 } 3087 /* 3088 * set the automatic mobility_base from kernel flag (by 3089 * micchie) 3090 */ 3091 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3092 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3093 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3094 } else { 3095 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3096 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3097 } 3098 /* 3099 * set the automatic mobility_fasthandoff from kernel flag 3100 * (by micchie) 3101 */ 3102 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3103 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3105 } else { 3106 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3107 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3108 } 3109 } else { 3110 /* 3111 * bind specific, make sure flags is off and add a new 3112 * address structure to the sctp_addr_list inside the ep 3113 * structure. 3114 * 3115 * We will need to allocate one and insert it at the head. The 3116 * socketopt call can just insert new addresses in there as 3117 * well. It will also have to do the embed scope kame hack 3118 * too (before adding). 3119 */ 3120 struct sctp_ifa *ifa; 3121 union sctp_sockstore store; 3122 3123 memset(&store, 0, sizeof(store)); 3124 switch (addr->sa_family) { 3125 #ifdef INET 3126 case AF_INET: 3127 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3128 store.sin.sin_port = 0; 3129 break; 3130 #endif 3131 #ifdef INET6 3132 case AF_INET6: 3133 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3134 store.sin6.sin6_port = 0; 3135 break; 3136 #endif 3137 default: 3138 break; 3139 } 3140 /* 3141 * first find the interface with the bound address need to 3142 * zero out the port to find the address! yuck! can't do 3143 * this earlier since need port for sctp_pcb_findep() 3144 */ 3145 if (sctp_ifap != NULL) { 3146 ifa = sctp_ifap; 3147 } else { 3148 /* 3149 * Note for BSD we hit here always other O/S's will 3150 * pass things in via the sctp_ifap argument 3151 * (Panda). 3152 */ 3153 ifa = sctp_find_ifa_by_addr(&store.sa, 3154 vrf_id, SCTP_ADDR_NOT_LOCKED); 3155 } 3156 if (ifa == NULL) { 3157 /* Can't find an interface with that address */ 3158 SCTP_INP_WUNLOCK(inp); 3159 SCTP_INP_INFO_WUNLOCK(); 3160 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3161 return (EADDRNOTAVAIL); 3162 } 3163 #ifdef INET6 3164 if (addr->sa_family == AF_INET6) { 3165 /* GAK, more FIXME IFA lock? */ 3166 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3167 /* Can't bind a non-existent addr. */ 3168 SCTP_INP_WUNLOCK(inp); 3169 SCTP_INP_INFO_WUNLOCK(); 3170 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3171 return (EINVAL); 3172 } 3173 } 3174 #endif 3175 /* we're not bound all */ 3176 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3177 /* allow bindx() to send ASCONF's for binding changes */ 3178 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3179 /* clear automatic addr changes from kernel flag */ 3180 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3181 3182 /* add this address to the endpoint list */ 3183 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3184 if (error != 0) { 3185 SCTP_INP_WUNLOCK(inp); 3186 SCTP_INP_INFO_WUNLOCK(); 3187 return (error); 3188 } 3189 inp->laddr_count++; 3190 } 3191 /* find the bucket */ 3192 if (port_reuse_active) { 3193 /* Put it into tcp 1-2-1 hash */ 3194 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3195 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3196 } else { 3197 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3198 } 3199 /* put it in the bucket */ 3200 LIST_INSERT_HEAD(head, inp, sctp_hash); 3201 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3202 (void *)head, ntohs(lport), port_reuse_active); 3203 /* set in the port */ 3204 inp->sctp_lport = lport; 3205 3206 /* turn off just the unbound flag */ 3207 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3208 SCTP_INP_WUNLOCK(inp); 3209 SCTP_INP_INFO_WUNLOCK(); 3210 return (0); 3211 } 3212 3213 3214 static void 3215 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3216 { 3217 struct sctp_iterator *it, *nit; 3218 3219 /* 3220 * We enter with the only the ITERATOR_LOCK in place and a write 3221 * lock on the inp_info stuff. 3222 */ 3223 it = sctp_it_ctl.cur_it; 3224 if (it && (it->vn != curvnet)) { 3225 /* Its not looking at our VNET */ 3226 return; 3227 } 3228 if (it && (it->inp == inp)) { 3229 /* 3230 * This is tricky and we hold the iterator lock, but when it 3231 * returns and gets the lock (when we release it) the 3232 * iterator will try to operate on inp. We need to stop that 3233 * from happening. But of course the iterator has a 3234 * reference on the stcb and inp. We can mark it and it will 3235 * stop. 3236 * 3237 * If its a single iterator situation, we set the end iterator 3238 * flag. Otherwise we set the iterator to go to the next 3239 * inp. 3240 * 3241 */ 3242 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3243 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3244 } else { 3245 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3246 } 3247 } 3248 /* 3249 * Now go through and remove any single reference to our inp that 3250 * may be still pending on the list 3251 */ 3252 SCTP_IPI_ITERATOR_WQ_LOCK(); 3253 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3254 if (it->vn != curvnet) { 3255 continue; 3256 } 3257 if (it->inp == inp) { 3258 /* This one points to me is it inp specific? */ 3259 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3260 /* Remove and free this one */ 3261 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3262 it, sctp_nxt_itr); 3263 if (it->function_atend != NULL) { 3264 (*it->function_atend) (it->pointer, it->val); 3265 } 3266 SCTP_FREE(it, SCTP_M_ITER); 3267 } else { 3268 it->inp = LIST_NEXT(it->inp, sctp_list); 3269 if (it->inp) { 3270 SCTP_INP_INCR_REF(it->inp); 3271 } 3272 } 3273 /* 3274 * When its put in the refcnt is incremented so decr 3275 * it 3276 */ 3277 SCTP_INP_DECR_REF(inp); 3278 } 3279 } 3280 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3281 } 3282 3283 /* release sctp_inpcb unbind the port */ 3284 void 3285 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3286 { 3287 /* 3288 * Here we free a endpoint. We must find it (if it is in the Hash 3289 * table) and remove it from there. Then we must also find it in the 3290 * overall list and remove it from there. After all removals are 3291 * complete then any timer has to be stopped. Then start the actual 3292 * freeing. a) Any local lists. b) Any associations. c) The hash of 3293 * all associations. d) finally the ep itself. 3294 */ 3295 struct sctp_tcb *asoc, *nasoc; 3296 struct sctp_laddr *laddr, *nladdr; 3297 struct inpcb *ip_pcb; 3298 struct socket *so; 3299 int being_refed = 0; 3300 struct sctp_queued_to_read *sq, *nsq; 3301 int cnt; 3302 sctp_sharedkey_t *shared_key, *nshared_key; 3303 3304 3305 #ifdef SCTP_LOG_CLOSING 3306 sctp_log_closing(inp, NULL, 0); 3307 #endif 3308 SCTP_ITERATOR_LOCK(); 3309 /* mark any iterators on the list or being processed */ 3310 sctp_iterator_inp_being_freed(inp); 3311 SCTP_ITERATOR_UNLOCK(); 3312 so = inp->sctp_socket; 3313 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3314 /* been here before.. eeks.. get out of here */ 3315 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3316 #ifdef SCTP_LOG_CLOSING 3317 sctp_log_closing(inp, NULL, 1); 3318 #endif 3319 return; 3320 } 3321 SCTP_ASOC_CREATE_LOCK(inp); 3322 SCTP_INP_INFO_WLOCK(); 3323 3324 SCTP_INP_WLOCK(inp); 3325 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3326 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3327 /* socket is gone, so no more wakeups allowed */ 3328 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3329 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3330 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3331 3332 } 3333 /* First time through we have the socket lock, after that no more. */ 3334 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3335 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3336 3337 if (inp->control) { 3338 sctp_m_freem(inp->control); 3339 inp->control = NULL; 3340 } 3341 if (inp->pkt) { 3342 sctp_m_freem(inp->pkt); 3343 inp->pkt = NULL; 3344 } 3345 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3346 * here but I will be nice :> (i.e. 3347 * ip_pcb = ep;) */ 3348 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3349 int cnt_in_sd; 3350 3351 cnt_in_sd = 0; 3352 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3353 SCTP_TCB_LOCK(asoc); 3354 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3355 /* Skip guys being freed */ 3356 cnt_in_sd++; 3357 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3358 /* 3359 * Special case - we did not start a 3360 * kill timer on the asoc due to it 3361 * was not closed. So go ahead and 3362 * start it now. 3363 */ 3364 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3365 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3366 } 3367 SCTP_TCB_UNLOCK(asoc); 3368 continue; 3369 } 3370 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3371 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3372 (asoc->asoc.total_output_queue_size == 0)) { 3373 /* 3374 * If we have data in queue, we don't want 3375 * to just free since the app may have done, 3376 * send()/close or connect/send/close. And 3377 * it wants the data to get across first. 3378 */ 3379 /* Just abandon things in the front states */ 3380 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3381 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3382 cnt_in_sd++; 3383 } 3384 continue; 3385 } 3386 /* Disconnect the socket please */ 3387 asoc->sctp_socket = NULL; 3388 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3389 if ((asoc->asoc.size_on_reasm_queue > 0) || 3390 (asoc->asoc.control_pdapi) || 3391 (asoc->asoc.size_on_all_streams > 0) || 3392 (so && (so->so_rcv.sb_cc > 0))) { 3393 /* Left with Data unread */ 3394 struct mbuf *op_err; 3395 3396 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3397 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3398 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3399 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3400 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3401 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3402 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3403 } 3404 if (sctp_free_assoc(inp, asoc, 3405 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3406 cnt_in_sd++; 3407 } 3408 continue; 3409 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3410 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3411 (asoc->asoc.stream_queue_cnt == 0)) { 3412 if (asoc->asoc.locked_on_sending) { 3413 goto abort_anyway; 3414 } 3415 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3416 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3417 struct sctp_nets *netp; 3418 3419 /* 3420 * there is nothing queued to send, 3421 * so I send shutdown 3422 */ 3423 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3424 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3425 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3426 } 3427 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3428 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3429 sctp_stop_timers_for_shutdown(asoc); 3430 if (asoc->asoc.alternate) { 3431 netp = asoc->asoc.alternate; 3432 } else { 3433 netp = asoc->asoc.primary_destination; 3434 } 3435 sctp_send_shutdown(asoc, netp); 3436 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3437 netp); 3438 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3439 asoc->asoc.primary_destination); 3440 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3441 } 3442 } else { 3443 /* mark into shutdown pending */ 3444 struct sctp_stream_queue_pending *sp; 3445 3446 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3447 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3448 asoc->asoc.primary_destination); 3449 if (asoc->asoc.locked_on_sending) { 3450 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3451 sctp_streamhead); 3452 if (sp == NULL) { 3453 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3454 (void *)asoc->asoc.locked_on_sending, 3455 asoc->asoc.locked_on_sending->stream_no); 3456 } else { 3457 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3458 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3459 } 3460 } 3461 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3462 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3463 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3464 struct mbuf *op_err; 3465 3466 abort_anyway: 3467 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3468 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3469 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3470 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3471 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3472 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3473 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3474 } 3475 if (sctp_free_assoc(inp, asoc, 3476 SCTP_PCBFREE_NOFORCE, 3477 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3478 cnt_in_sd++; 3479 } 3480 continue; 3481 } else { 3482 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3483 } 3484 } 3485 cnt_in_sd++; 3486 SCTP_TCB_UNLOCK(asoc); 3487 } 3488 /* now is there some left in our SHUTDOWN state? */ 3489 if (cnt_in_sd) { 3490 #ifdef SCTP_LOG_CLOSING 3491 sctp_log_closing(inp, NULL, 2); 3492 #endif 3493 inp->sctp_socket = NULL; 3494 SCTP_INP_WUNLOCK(inp); 3495 SCTP_ASOC_CREATE_UNLOCK(inp); 3496 SCTP_INP_INFO_WUNLOCK(); 3497 return; 3498 } 3499 } 3500 inp->sctp_socket = NULL; 3501 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3502 SCTP_PCB_FLAGS_UNBOUND) { 3503 /* 3504 * ok, this guy has been bound. It's port is somewhere in 3505 * the SCTP_BASE_INFO(hash table). Remove it! 3506 */ 3507 LIST_REMOVE(inp, sctp_hash); 3508 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3509 } 3510 /* 3511 * If there is a timer running to kill us, forget it, since it may 3512 * have a contest on the INP lock.. which would cause us to die ... 3513 */ 3514 cnt = 0; 3515 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3516 SCTP_TCB_LOCK(asoc); 3517 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3518 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3519 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3520 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3521 } 3522 cnt++; 3523 SCTP_TCB_UNLOCK(asoc); 3524 continue; 3525 } 3526 /* Free associations that are NOT killing us */ 3527 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3528 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3529 struct mbuf *op_err; 3530 3531 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3532 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3533 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3534 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3535 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3536 cnt++; 3537 SCTP_TCB_UNLOCK(asoc); 3538 continue; 3539 } 3540 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3541 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3542 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3543 } 3544 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3545 cnt++; 3546 } 3547 } 3548 if (cnt) { 3549 /* Ok we have someone out there that will kill us */ 3550 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3551 #ifdef SCTP_LOG_CLOSING 3552 sctp_log_closing(inp, NULL, 3); 3553 #endif 3554 SCTP_INP_WUNLOCK(inp); 3555 SCTP_ASOC_CREATE_UNLOCK(inp); 3556 SCTP_INP_INFO_WUNLOCK(); 3557 return; 3558 } 3559 if (SCTP_INP_LOCK_CONTENDED(inp)) 3560 being_refed++; 3561 if (SCTP_INP_READ_CONTENDED(inp)) 3562 being_refed++; 3563 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3564 being_refed++; 3565 3566 if ((inp->refcount) || 3567 (being_refed) || 3568 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3569 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3570 #ifdef SCTP_LOG_CLOSING 3571 sctp_log_closing(inp, NULL, 4); 3572 #endif 3573 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3574 SCTP_INP_WUNLOCK(inp); 3575 SCTP_ASOC_CREATE_UNLOCK(inp); 3576 SCTP_INP_INFO_WUNLOCK(); 3577 return; 3578 } 3579 inp->sctp_ep.signature_change.type = 0; 3580 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3581 /* 3582 * Remove it from the list .. last thing we need a lock for. 3583 */ 3584 LIST_REMOVE(inp, sctp_list); 3585 SCTP_INP_WUNLOCK(inp); 3586 SCTP_ASOC_CREATE_UNLOCK(inp); 3587 SCTP_INP_INFO_WUNLOCK(); 3588 /* 3589 * Now we release all locks. Since this INP cannot be found anymore 3590 * except possibly by the kill timer that might be running. We call 3591 * the drain function here. It should hit the case were it sees the 3592 * ACTIVE flag cleared and exit out freeing us to proceed and 3593 * destroy everything. 3594 */ 3595 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3596 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3597 } else { 3598 /* Probably un-needed */ 3599 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3600 } 3601 3602 #ifdef SCTP_LOG_CLOSING 3603 sctp_log_closing(inp, NULL, 5); 3604 #endif 3605 3606 3607 if ((inp->sctp_asocidhash) != NULL) { 3608 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3609 inp->sctp_asocidhash = NULL; 3610 } 3611 /* sa_ignore FREED_MEMORY */ 3612 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3613 /* Its only abandoned if it had data left */ 3614 if (sq->length) 3615 SCTP_STAT_INCR(sctps_left_abandon); 3616 3617 TAILQ_REMOVE(&inp->read_queue, sq, next); 3618 sctp_free_remote_addr(sq->whoFrom); 3619 if (so) 3620 so->so_rcv.sb_cc -= sq->length; 3621 if (sq->data) { 3622 sctp_m_freem(sq->data); 3623 sq->data = NULL; 3624 } 3625 /* 3626 * no need to free the net count, since at this point all 3627 * assoc's are gone. 3628 */ 3629 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3630 SCTP_DECR_READQ_COUNT(); 3631 } 3632 /* Now the sctp_pcb things */ 3633 /* 3634 * free each asoc if it is not already closed/free. we can't use the 3635 * macro here since le_next will get freed as part of the 3636 * sctp_free_assoc() call. 3637 */ 3638 if (so) { 3639 #ifdef IPSEC 3640 ipsec_delete_pcbpolicy(ip_pcb); 3641 #endif /* IPSEC */ 3642 3643 /* Unlocks not needed since the socket is gone now */ 3644 } 3645 if (ip_pcb->inp_options) { 3646 (void)sctp_m_free(ip_pcb->inp_options); 3647 ip_pcb->inp_options = 0; 3648 } 3649 #ifdef INET6 3650 if (ip_pcb->inp_vflag & INP_IPV6) { 3651 struct in6pcb *in6p; 3652 3653 in6p = (struct in6pcb *)inp; 3654 ip6_freepcbopts(in6p->in6p_outputopts); 3655 } 3656 #endif /* INET6 */ 3657 ip_pcb->inp_vflag = 0; 3658 /* free up authentication fields */ 3659 if (inp->sctp_ep.local_auth_chunks != NULL) 3660 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3661 if (inp->sctp_ep.local_hmacs != NULL) 3662 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3663 3664 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3665 LIST_REMOVE(shared_key, next); 3666 sctp_free_sharedkey(shared_key); 3667 /* sa_ignore FREED_MEMORY */ 3668 } 3669 3670 /* 3671 * if we have an address list the following will free the list of 3672 * ifaddr's that are set into this ep. Again macro limitations here, 3673 * since the LIST_FOREACH could be a bad idea. 3674 */ 3675 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3676 sctp_remove_laddr(laddr); 3677 } 3678 3679 #ifdef SCTP_TRACK_FREED_ASOCS 3680 /* TEMP CODE */ 3681 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3682 LIST_REMOVE(asoc, sctp_tcblist); 3683 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3684 SCTP_DECR_ASOC_COUNT(); 3685 } 3686 /* *** END TEMP CODE *** */ 3687 #endif 3688 /* Now lets see about freeing the EP hash table. */ 3689 if (inp->sctp_tcbhash != NULL) { 3690 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3691 inp->sctp_tcbhash = NULL; 3692 } 3693 /* Now we must put the ep memory back into the zone pool */ 3694 crfree(inp->ip_inp.inp.inp_cred); 3695 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3696 SCTP_INP_LOCK_DESTROY(inp); 3697 SCTP_INP_READ_DESTROY(inp); 3698 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3699 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3700 SCTP_DECR_EP_COUNT(); 3701 } 3702 3703 3704 struct sctp_nets * 3705 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3706 { 3707 struct sctp_nets *net; 3708 3709 /* locate the address */ 3710 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3711 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3712 return (net); 3713 } 3714 return (NULL); 3715 } 3716 3717 3718 int 3719 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3720 { 3721 struct sctp_ifa *sctp_ifa; 3722 3723 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3724 if (sctp_ifa) { 3725 return (1); 3726 } else { 3727 return (0); 3728 } 3729 } 3730 3731 /* 3732 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3733 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3734 * stats of stuff. 3735 */ 3736 int 3737 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3738 struct sctp_nets **netp, int set_scope, int from) 3739 { 3740 /* 3741 * The following is redundant to the same lines in the 3742 * sctp_aloc_assoc() but is needed since others call the add address 3743 * function 3744 */ 3745 struct sctp_nets *net, *netfirst; 3746 int addr_inscope; 3747 3748 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3749 from); 3750 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3751 3752 netfirst = sctp_findnet(stcb, newaddr); 3753 if (netfirst) { 3754 /* 3755 * Lie and return ok, we don't want to make the association 3756 * go away for this behavior. It will happen in the TCP 3757 * model in a connected socket. It does not reach the hash 3758 * table until after the association is built so it can't be 3759 * found. Mark as reachable, since the initial creation will 3760 * have been cleared and the NOT_IN_ASSOC flag will have 3761 * been added... and we don't want to end up removing it 3762 * back out. 3763 */ 3764 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3765 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3766 SCTP_ADDR_UNCONFIRMED); 3767 } else { 3768 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3769 } 3770 3771 return (0); 3772 } 3773 addr_inscope = 1; 3774 switch (newaddr->sa_family) { 3775 #ifdef INET 3776 case AF_INET: 3777 { 3778 struct sockaddr_in *sin; 3779 3780 sin = (struct sockaddr_in *)newaddr; 3781 if (sin->sin_addr.s_addr == 0) { 3782 /* Invalid address */ 3783 return (-1); 3784 } 3785 /* zero out the bzero area */ 3786 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3787 3788 /* assure len is set */ 3789 sin->sin_len = sizeof(struct sockaddr_in); 3790 if (set_scope) { 3791 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3792 stcb->asoc.scope.ipv4_local_scope = 1; 3793 #else 3794 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3795 stcb->asoc.scope.ipv4_local_scope = 1; 3796 } 3797 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 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, stcb->asoc.vrf_id); 3953 3954 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3955 /* Get source address */ 3956 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3957 stcb, 3958 (sctp_route_t *) & net->ro, 3959 net, 3960 0, 3961 stcb->asoc.vrf_id); 3962 if (net->ro._s_addr != NULL) { 3963 net->src_addr_selected = 1; 3964 /* Now get the interface MTU */ 3965 if (net->ro._s_addr->ifn_p != NULL) { 3966 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3967 } 3968 } else { 3969 net->src_addr_selected = 0; 3970 } 3971 if (net->mtu > 0) { 3972 uint32_t rmtu; 3973 3974 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3975 if (rmtu == 0) { 3976 /* 3977 * Start things off to match mtu of 3978 * interface please. 3979 */ 3980 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3981 net->ro.ro_rt, net->mtu); 3982 } else { 3983 /* 3984 * we take the route mtu over the interface, 3985 * since the route may be leading out the 3986 * loopback, or a different interface. 3987 */ 3988 net->mtu = rmtu; 3989 } 3990 } 3991 } else { 3992 net->src_addr_selected = 0; 3993 } 3994 if (net->mtu == 0) { 3995 switch (newaddr->sa_family) { 3996 #ifdef INET 3997 case AF_INET: 3998 net->mtu = SCTP_DEFAULT_MTU; 3999 break; 4000 #endif 4001 #ifdef INET6 4002 case AF_INET6: 4003 net->mtu = 1280; 4004 break; 4005 #endif 4006 default: 4007 break; 4008 } 4009 } 4010 #if defined(INET) || defined(INET6) 4011 if (net->port) { 4012 net->mtu -= (uint32_t) sizeof(struct udphdr); 4013 } 4014 #endif 4015 if (from == SCTP_ALLOC_ASOC) { 4016 stcb->asoc.smallest_mtu = net->mtu; 4017 } 4018 if (stcb->asoc.smallest_mtu > net->mtu) { 4019 stcb->asoc.smallest_mtu = net->mtu; 4020 } 4021 #ifdef INET6 4022 if (newaddr->sa_family == AF_INET6) { 4023 struct sockaddr_in6 *sin6; 4024 4025 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4026 (void)sa6_recoverscope(sin6); 4027 } 4028 #endif 4029 4030 /* JRS - Use the congestion control given in the CC module */ 4031 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4032 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4033 4034 /* 4035 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4036 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4037 */ 4038 net->find_pseudo_cumack = 1; 4039 net->find_rtx_pseudo_cumack = 1; 4040 /* Choose an initial flowid. */ 4041 net->flowid = stcb->asoc.my_vtag ^ 4042 ntohs(stcb->rport) ^ 4043 ntohs(stcb->sctp_ep->sctp_lport); 4044 net->flowtype = M_HASHTYPE_OPAQUE; 4045 if (netp) { 4046 *netp = net; 4047 } 4048 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4049 if (net->ro.ro_rt == NULL) { 4050 /* Since we have no route put it at the back */ 4051 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4052 } else if (netfirst == NULL) { 4053 /* We are the first one in the pool. */ 4054 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4055 } else if (netfirst->ro.ro_rt == NULL) { 4056 /* 4057 * First one has NO route. Place this one ahead of the first 4058 * one. 4059 */ 4060 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4061 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4062 /* 4063 * This one has a different interface than the one at the 4064 * top of the list. Place it ahead. 4065 */ 4066 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4067 } else { 4068 /* 4069 * Ok we have the same interface as the first one. Move 4070 * forward until we find either a) one with a NULL route... 4071 * insert ahead of that b) one with a different ifp.. insert 4072 * after that. c) end of the list.. insert at the tail. 4073 */ 4074 struct sctp_nets *netlook; 4075 4076 do { 4077 netlook = TAILQ_NEXT(netfirst, sctp_next); 4078 if (netlook == NULL) { 4079 /* End of the list */ 4080 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4081 break; 4082 } else if (netlook->ro.ro_rt == NULL) { 4083 /* next one has NO route */ 4084 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4085 break; 4086 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4087 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4088 net, sctp_next); 4089 break; 4090 } 4091 /* Shift forward */ 4092 netfirst = netlook; 4093 } while (netlook != NULL); 4094 } 4095 4096 /* got to have a primary set */ 4097 if (stcb->asoc.primary_destination == 0) { 4098 stcb->asoc.primary_destination = net; 4099 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4100 (net->ro.ro_rt) && 4101 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4102 /* No route to current primary adopt new primary */ 4103 stcb->asoc.primary_destination = net; 4104 } 4105 /* Validate primary is first */ 4106 net = TAILQ_FIRST(&stcb->asoc.nets); 4107 if ((net != stcb->asoc.primary_destination) && 4108 (stcb->asoc.primary_destination)) { 4109 /* 4110 * first one on the list is NOT the primary sctp_cmpaddr() 4111 * is much more efficient if the primary is the first on the 4112 * list, make it so. 4113 */ 4114 TAILQ_REMOVE(&stcb->asoc.nets, 4115 stcb->asoc.primary_destination, sctp_next); 4116 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4117 stcb->asoc.primary_destination, sctp_next); 4118 } 4119 return (0); 4120 } 4121 4122 4123 static uint32_t 4124 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4125 { 4126 uint32_t id; 4127 struct sctpasochead *head; 4128 struct sctp_tcb *lstcb; 4129 4130 SCTP_INP_WLOCK(inp); 4131 try_again: 4132 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4133 /* TSNH */ 4134 SCTP_INP_WUNLOCK(inp); 4135 return (0); 4136 } 4137 /* 4138 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4139 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4140 */ 4141 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4142 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4143 } 4144 id = inp->sctp_associd_counter; 4145 inp->sctp_associd_counter++; 4146 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4147 if (lstcb) { 4148 goto try_again; 4149 } 4150 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4151 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4152 stcb->asoc.in_asocid_hash = 1; 4153 SCTP_INP_WUNLOCK(inp); 4154 return id; 4155 } 4156 4157 /* 4158 * allocate an association and add it to the endpoint. The caller must be 4159 * careful to add all additional addresses once they are know right away or 4160 * else the assoc will be may experience a blackout scenario. 4161 */ 4162 struct sctp_tcb * 4163 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4164 int *error, uint32_t override_tag, uint32_t vrf_id, 4165 struct thread *p 4166 ) 4167 { 4168 /* note the p argument is only valid in unbound sockets */ 4169 4170 struct sctp_tcb *stcb; 4171 struct sctp_association *asoc; 4172 struct sctpasochead *head; 4173 uint16_t rport; 4174 int err; 4175 4176 /* 4177 * Assumption made here: Caller has done a 4178 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4179 * address does not exist already. 4180 */ 4181 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4182 /* Hit max assoc, sorry no more */ 4183 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4184 *error = ENOBUFS; 4185 return (NULL); 4186 } 4187 if (firstaddr == NULL) { 4188 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4189 *error = EINVAL; 4190 return (NULL); 4191 } 4192 SCTP_INP_RLOCK(inp); 4193 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4194 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4195 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4196 /* 4197 * If its in the TCP pool, its NOT allowed to create an 4198 * association. The parent listener needs to call 4199 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4200 * off, or connected one does this.. its an error. 4201 */ 4202 SCTP_INP_RUNLOCK(inp); 4203 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4204 *error = EINVAL; 4205 return (NULL); 4206 } 4207 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4208 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4209 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4210 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4211 SCTP_INP_RUNLOCK(inp); 4212 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4213 *error = EINVAL; 4214 return (NULL); 4215 } 4216 } 4217 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4218 #ifdef SCTP_DEBUG 4219 if (firstaddr) { 4220 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4221 switch (firstaddr->sa_family) { 4222 #ifdef INET 4223 case AF_INET: 4224 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4225 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4226 break; 4227 #endif 4228 #ifdef INET6 4229 case AF_INET6: 4230 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4231 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4232 break; 4233 #endif 4234 default: 4235 break; 4236 } 4237 } else { 4238 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4239 } 4240 #endif /* SCTP_DEBUG */ 4241 switch (firstaddr->sa_family) { 4242 #ifdef INET 4243 case AF_INET: 4244 { 4245 struct sockaddr_in *sin; 4246 4247 sin = (struct sockaddr_in *)firstaddr; 4248 if ((ntohs(sin->sin_port) == 0) || 4249 (sin->sin_addr.s_addr == INADDR_ANY) || 4250 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4251 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4252 /* Invalid address */ 4253 SCTP_INP_RUNLOCK(inp); 4254 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4255 *error = EINVAL; 4256 return (NULL); 4257 } 4258 rport = sin->sin_port; 4259 break; 4260 } 4261 #endif 4262 #ifdef INET6 4263 case AF_INET6: 4264 { 4265 struct sockaddr_in6 *sin6; 4266 4267 sin6 = (struct sockaddr_in6 *)firstaddr; 4268 if ((ntohs(sin6->sin6_port) == 0) || 4269 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4270 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4271 /* Invalid address */ 4272 SCTP_INP_RUNLOCK(inp); 4273 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4274 *error = EINVAL; 4275 return (NULL); 4276 } 4277 rport = sin6->sin6_port; 4278 break; 4279 } 4280 #endif 4281 default: 4282 /* not supported family type */ 4283 SCTP_INP_RUNLOCK(inp); 4284 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4285 *error = EINVAL; 4286 return (NULL); 4287 } 4288 SCTP_INP_RUNLOCK(inp); 4289 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4290 /* 4291 * If you have not performed a bind, then we need to do the 4292 * ephemeral bind for you. 4293 */ 4294 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4295 (struct sockaddr *)NULL, 4296 (struct sctp_ifa *)NULL, 4297 p 4298 ))) { 4299 /* bind error, probably perm */ 4300 *error = err; 4301 return (NULL); 4302 } 4303 } 4304 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4305 if (stcb == NULL) { 4306 /* out of memory? */ 4307 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4308 *error = ENOMEM; 4309 return (NULL); 4310 } 4311 SCTP_INCR_ASOC_COUNT(); 4312 4313 bzero(stcb, sizeof(*stcb)); 4314 asoc = &stcb->asoc; 4315 4316 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4317 SCTP_TCB_LOCK_INIT(stcb); 4318 SCTP_TCB_SEND_LOCK_INIT(stcb); 4319 stcb->rport = rport; 4320 /* setup back pointer's */ 4321 stcb->sctp_ep = inp; 4322 stcb->sctp_socket = inp->sctp_socket; 4323 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4324 /* failed */ 4325 SCTP_TCB_LOCK_DESTROY(stcb); 4326 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4327 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4328 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4329 SCTP_DECR_ASOC_COUNT(); 4330 *error = err; 4331 return (NULL); 4332 } 4333 /* and the port */ 4334 SCTP_INP_INFO_WLOCK(); 4335 SCTP_INP_WLOCK(inp); 4336 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4337 /* inpcb freed while alloc going on */ 4338 SCTP_TCB_LOCK_DESTROY(stcb); 4339 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4340 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4341 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4342 SCTP_INP_WUNLOCK(inp); 4343 SCTP_INP_INFO_WUNLOCK(); 4344 SCTP_DECR_ASOC_COUNT(); 4345 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4346 *error = EINVAL; 4347 return (NULL); 4348 } 4349 SCTP_TCB_LOCK(stcb); 4350 4351 /* now that my_vtag is set, add it to the hash */ 4352 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4353 /* put it in the bucket in the vtag hash of assoc's for the system */ 4354 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4355 SCTP_INP_INFO_WUNLOCK(); 4356 4357 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4358 /* failure.. memory error? */ 4359 if (asoc->strmout) { 4360 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4361 asoc->strmout = NULL; 4362 } 4363 if (asoc->mapping_array) { 4364 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4365 asoc->mapping_array = NULL; 4366 } 4367 if (asoc->nr_mapping_array) { 4368 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4369 asoc->nr_mapping_array = NULL; 4370 } 4371 SCTP_DECR_ASOC_COUNT(); 4372 SCTP_TCB_UNLOCK(stcb); 4373 SCTP_TCB_LOCK_DESTROY(stcb); 4374 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4375 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4376 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4377 SCTP_INP_WUNLOCK(inp); 4378 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4379 *error = ENOBUFS; 4380 return (NULL); 4381 } 4382 /* Init all the timers */ 4383 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4384 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4385 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4386 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4387 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4388 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4389 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4390 4391 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4392 /* now file the port under the hash as well */ 4393 if (inp->sctp_tcbhash != NULL) { 4394 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4395 inp->sctp_hashmark)]; 4396 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4397 } 4398 SCTP_INP_WUNLOCK(inp); 4399 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4400 return (stcb); 4401 } 4402 4403 4404 void 4405 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4406 { 4407 struct sctp_association *asoc; 4408 4409 asoc = &stcb->asoc; 4410 asoc->numnets--; 4411 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4412 if (net == asoc->primary_destination) { 4413 /* Reset primary */ 4414 struct sctp_nets *lnet; 4415 4416 lnet = TAILQ_FIRST(&asoc->nets); 4417 /* 4418 * Mobility adaptation Ideally, if deleted destination is 4419 * the primary, it becomes a fast retransmission trigger by 4420 * the subsequent SET PRIMARY. (by micchie) 4421 */ 4422 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4423 SCTP_MOBILITY_BASE) || 4424 sctp_is_mobility_feature_on(stcb->sctp_ep, 4425 SCTP_MOBILITY_FASTHANDOFF)) { 4426 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4427 if (asoc->deleted_primary != NULL) { 4428 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4429 goto out; 4430 } 4431 asoc->deleted_primary = net; 4432 atomic_add_int(&net->ref_count, 1); 4433 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4434 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4435 sctp_mobility_feature_on(stcb->sctp_ep, 4436 SCTP_MOBILITY_PRIM_DELETED); 4437 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4438 stcb->sctp_ep, stcb, NULL); 4439 } 4440 out: 4441 /* Try to find a confirmed primary */ 4442 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4443 } 4444 if (net == asoc->last_data_chunk_from) { 4445 /* Reset primary */ 4446 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4447 } 4448 if (net == asoc->last_control_chunk_from) { 4449 /* Clear net */ 4450 asoc->last_control_chunk_from = NULL; 4451 } 4452 if (net == stcb->asoc.alternate) { 4453 sctp_free_remote_addr(stcb->asoc.alternate); 4454 stcb->asoc.alternate = NULL; 4455 } 4456 sctp_free_remote_addr(net); 4457 } 4458 4459 /* 4460 * remove a remote endpoint address from an association, it will fail if the 4461 * address does not exist. 4462 */ 4463 int 4464 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4465 { 4466 /* 4467 * Here we need to remove a remote address. This is quite simple, we 4468 * first find it in the list of address for the association 4469 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4470 * on that item. Note we do not allow it to be removed if there are 4471 * no other addresses. 4472 */ 4473 struct sctp_association *asoc; 4474 struct sctp_nets *net, *nnet; 4475 4476 asoc = &stcb->asoc; 4477 4478 /* locate the address */ 4479 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4480 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4481 continue; 4482 } 4483 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4484 remaddr)) { 4485 /* we found the guy */ 4486 if (asoc->numnets < 2) { 4487 /* Must have at LEAST two remote addresses */ 4488 return (-1); 4489 } else { 4490 sctp_remove_net(stcb, net); 4491 return (0); 4492 } 4493 } 4494 } 4495 /* not found. */ 4496 return (-2); 4497 } 4498 4499 void 4500 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4501 { 4502 struct sctpvtaghead *chain; 4503 struct sctp_tagblock *twait_block; 4504 int found = 0; 4505 int i; 4506 4507 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4508 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4509 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4510 if ((twait_block->vtag_block[i].v_tag == tag) && 4511 (twait_block->vtag_block[i].lport == lport) && 4512 (twait_block->vtag_block[i].rport == rport)) { 4513 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4514 twait_block->vtag_block[i].v_tag = 0; 4515 twait_block->vtag_block[i].lport = 0; 4516 twait_block->vtag_block[i].rport = 0; 4517 found = 1; 4518 break; 4519 } 4520 } 4521 if (found) 4522 break; 4523 } 4524 } 4525 4526 int 4527 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4528 { 4529 struct sctpvtaghead *chain; 4530 struct sctp_tagblock *twait_block; 4531 int found = 0; 4532 int i; 4533 4534 SCTP_INP_INFO_WLOCK(); 4535 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4536 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4537 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4538 if ((twait_block->vtag_block[i].v_tag == tag) && 4539 (twait_block->vtag_block[i].lport == lport) && 4540 (twait_block->vtag_block[i].rport == rport)) { 4541 found = 1; 4542 break; 4543 } 4544 } 4545 if (found) 4546 break; 4547 } 4548 SCTP_INP_INFO_WUNLOCK(); 4549 return (found); 4550 } 4551 4552 4553 void 4554 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4555 { 4556 struct sctpvtaghead *chain; 4557 struct sctp_tagblock *twait_block; 4558 struct timeval now; 4559 int set, i; 4560 4561 if (time == 0) { 4562 /* Its disabled */ 4563 return; 4564 } 4565 (void)SCTP_GETTIME_TIMEVAL(&now); 4566 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4567 set = 0; 4568 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4569 /* Block(s) present, lets find space, and expire on the fly */ 4570 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4571 if ((twait_block->vtag_block[i].v_tag == 0) && 4572 !set) { 4573 twait_block->vtag_block[i].tv_sec_at_expire = 4574 now.tv_sec + time; 4575 twait_block->vtag_block[i].v_tag = tag; 4576 twait_block->vtag_block[i].lport = lport; 4577 twait_block->vtag_block[i].rport = rport; 4578 set = 1; 4579 } else if ((twait_block->vtag_block[i].v_tag) && 4580 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4581 /* Audit expires this guy */ 4582 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4583 twait_block->vtag_block[i].v_tag = 0; 4584 twait_block->vtag_block[i].lport = 0; 4585 twait_block->vtag_block[i].rport = 0; 4586 if (set == 0) { 4587 /* Reuse it for my new tag */ 4588 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4589 twait_block->vtag_block[i].v_tag = tag; 4590 twait_block->vtag_block[i].lport = lport; 4591 twait_block->vtag_block[i].rport = rport; 4592 set = 1; 4593 } 4594 } 4595 } 4596 if (set) { 4597 /* 4598 * We only do up to the block where we can place our 4599 * tag for audits 4600 */ 4601 break; 4602 } 4603 } 4604 /* Need to add a new block to chain */ 4605 if (!set) { 4606 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4607 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4608 if (twait_block == NULL) { 4609 #ifdef INVARIANTS 4610 panic("Can not alloc tagblock"); 4611 #endif 4612 return; 4613 } 4614 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4615 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4616 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4617 twait_block->vtag_block[0].v_tag = tag; 4618 twait_block->vtag_block[0].lport = lport; 4619 twait_block->vtag_block[0].rport = rport; 4620 } 4621 } 4622 4623 4624 4625 /*- 4626 * Free the association after un-hashing the remote port. This 4627 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4628 * expect that the input to this function IS a locked TCB. 4629 * It will return 0, if it did NOT destroy the association (instead 4630 * it unlocks it. It will return NON-zero if it either destroyed the 4631 * association OR the association is already destroyed. 4632 */ 4633 int 4634 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4635 { 4636 int i; 4637 struct sctp_association *asoc; 4638 struct sctp_nets *net, *nnet; 4639 struct sctp_laddr *laddr, *naddr; 4640 struct sctp_tmit_chunk *chk, *nchk; 4641 struct sctp_asconf_addr *aparam, *naparam; 4642 struct sctp_asconf_ack *aack, *naack; 4643 struct sctp_stream_reset_list *strrst, *nstrrst; 4644 struct sctp_queued_to_read *sq, *nsq; 4645 struct sctp_stream_queue_pending *sp, *nsp; 4646 sctp_sharedkey_t *shared_key, *nshared_key; 4647 struct socket *so; 4648 4649 /* first, lets purge the entry from the hash table. */ 4650 4651 #ifdef SCTP_LOG_CLOSING 4652 sctp_log_closing(inp, stcb, 6); 4653 #endif 4654 if (stcb->asoc.state == 0) { 4655 #ifdef SCTP_LOG_CLOSING 4656 sctp_log_closing(inp, NULL, 7); 4657 #endif 4658 /* there is no asoc, really TSNH :-0 */ 4659 return (1); 4660 } 4661 if (stcb->asoc.alternate) { 4662 sctp_free_remote_addr(stcb->asoc.alternate); 4663 stcb->asoc.alternate = NULL; 4664 } 4665 /* TEMP CODE */ 4666 if (stcb->freed_from_where == 0) { 4667 /* Only record the first place free happened from */ 4668 stcb->freed_from_where = from_location; 4669 } 4670 /* TEMP CODE */ 4671 4672 asoc = &stcb->asoc; 4673 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4674 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4675 /* nothing around */ 4676 so = NULL; 4677 else 4678 so = inp->sctp_socket; 4679 4680 /* 4681 * We used timer based freeing if a reader or writer is in the way. 4682 * So we first check if we are actually being called from a timer, 4683 * if so we abort early if a reader or writer is still in the way. 4684 */ 4685 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4686 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4687 /* 4688 * is it the timer driving us? if so are the reader/writers 4689 * gone? 4690 */ 4691 if (stcb->asoc.refcnt) { 4692 /* nope, reader or writer in the way */ 4693 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4694 /* no asoc destroyed */ 4695 SCTP_TCB_UNLOCK(stcb); 4696 #ifdef SCTP_LOG_CLOSING 4697 sctp_log_closing(inp, stcb, 8); 4698 #endif 4699 return (0); 4700 } 4701 } 4702 /* now clean up any other timers */ 4703 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4704 asoc->dack_timer.self = NULL; 4705 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4706 /*- 4707 * For stream reset we don't blast this unless 4708 * it is a str-reset timer, it might be the 4709 * free-asoc timer which we DON'T want to 4710 * disturb. 4711 */ 4712 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4713 asoc->strreset_timer.self = NULL; 4714 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4715 asoc->asconf_timer.self = NULL; 4716 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4717 asoc->autoclose_timer.self = NULL; 4718 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4719 asoc->shut_guard_timer.self = NULL; 4720 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4721 asoc->delayed_event_timer.self = NULL; 4722 /* Mobility adaptation */ 4723 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4724 asoc->delete_prim_timer.self = NULL; 4725 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4726 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4727 net->rxt_timer.self = NULL; 4728 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4729 net->pmtu_timer.self = NULL; 4730 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4731 net->hb_timer.self = NULL; 4732 } 4733 /* Now the read queue needs to be cleaned up (only once) */ 4734 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4735 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4736 SCTP_INP_READ_LOCK(inp); 4737 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4738 if (sq->stcb == stcb) { 4739 sq->do_not_ref_stcb = 1; 4740 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4741 /* 4742 * If there is no end, there never will be 4743 * now. 4744 */ 4745 if (sq->end_added == 0) { 4746 /* Held for PD-API clear that. */ 4747 sq->pdapi_aborted = 1; 4748 sq->held_length = 0; 4749 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4750 /* 4751 * Need to add a PD-API 4752 * aborted indication. 4753 * Setting the control_pdapi 4754 * assures that it will be 4755 * added right after this 4756 * msg. 4757 */ 4758 uint32_t strseq; 4759 4760 stcb->asoc.control_pdapi = sq; 4761 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4762 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4763 stcb, 4764 SCTP_PARTIAL_DELIVERY_ABORTED, 4765 (void *)&strseq, 4766 SCTP_SO_LOCKED); 4767 stcb->asoc.control_pdapi = NULL; 4768 } 4769 } 4770 /* Add an end to wake them */ 4771 sq->end_added = 1; 4772 } 4773 } 4774 SCTP_INP_READ_UNLOCK(inp); 4775 if (stcb->block_entry) { 4776 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4777 stcb->block_entry->error = ECONNRESET; 4778 stcb->block_entry = NULL; 4779 } 4780 } 4781 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4782 /* 4783 * Someone holds a reference OR the socket is unaccepted 4784 * yet. 4785 */ 4786 if ((stcb->asoc.refcnt) || 4787 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4788 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4789 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4790 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4791 } 4792 SCTP_TCB_UNLOCK(stcb); 4793 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4794 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4795 /* nothing around */ 4796 so = NULL; 4797 if (so) { 4798 /* Wake any reader/writers */ 4799 sctp_sorwakeup(inp, so); 4800 sctp_sowwakeup(inp, so); 4801 } 4802 #ifdef SCTP_LOG_CLOSING 4803 sctp_log_closing(inp, stcb, 9); 4804 #endif 4805 /* no asoc destroyed */ 4806 return (0); 4807 } 4808 #ifdef SCTP_LOG_CLOSING 4809 sctp_log_closing(inp, stcb, 10); 4810 #endif 4811 /* 4812 * When I reach here, no others want to kill the assoc yet.. and I 4813 * own the lock. Now its possible an abort comes in when I do the 4814 * lock exchange below to grab all the locks to do the final take 4815 * out. to prevent this we increment the count, which will start a 4816 * timer and blow out above thus assuring us that we hold exclusive 4817 * killing of the asoc. Note that after getting back the TCB lock we 4818 * will go ahead and increment the counter back up and stop any 4819 * timer a passing stranger may have started :-S 4820 */ 4821 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4822 atomic_add_int(&stcb->asoc.refcnt, 1); 4823 4824 SCTP_TCB_UNLOCK(stcb); 4825 SCTP_INP_INFO_WLOCK(); 4826 SCTP_INP_WLOCK(inp); 4827 SCTP_TCB_LOCK(stcb); 4828 } 4829 /* Double check the GONE flag */ 4830 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4831 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4832 /* nothing around */ 4833 so = NULL; 4834 4835 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4836 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4837 /* 4838 * For TCP type we need special handling when we are 4839 * connected. We also include the peel'ed off ones to. 4840 */ 4841 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4842 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4843 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4844 if (so) { 4845 SOCK_LOCK(so); 4846 if (so->so_rcv.sb_cc == 0) { 4847 so->so_state &= ~(SS_ISCONNECTING | 4848 SS_ISDISCONNECTING | 4849 SS_ISCONFIRMING | 4850 SS_ISCONNECTED); 4851 } 4852 socantrcvmore_locked(so); 4853 sctp_sowwakeup(inp, so); 4854 sctp_sorwakeup(inp, so); 4855 SCTP_SOWAKEUP(so); 4856 } 4857 } 4858 } 4859 /* 4860 * Make it invalid too, that way if its about to run it will abort 4861 * and return. 4862 */ 4863 /* re-increment the lock */ 4864 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4865 atomic_add_int(&stcb->asoc.refcnt, -1); 4866 } 4867 if (stcb->asoc.refcnt) { 4868 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4869 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4870 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4871 SCTP_INP_INFO_WUNLOCK(); 4872 SCTP_INP_WUNLOCK(inp); 4873 } 4874 SCTP_TCB_UNLOCK(stcb); 4875 return (0); 4876 } 4877 asoc->state = 0; 4878 if (inp->sctp_tcbhash) { 4879 LIST_REMOVE(stcb, sctp_tcbhash); 4880 } 4881 if (stcb->asoc.in_asocid_hash) { 4882 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4883 } 4884 /* Now lets remove it from the list of ALL associations in the EP */ 4885 LIST_REMOVE(stcb, sctp_tcblist); 4886 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4887 SCTP_INP_INCR_REF(inp); 4888 SCTP_INP_WUNLOCK(inp); 4889 } 4890 /* pull from vtag hash */ 4891 LIST_REMOVE(stcb, sctp_asocs); 4892 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4893 inp->sctp_lport, stcb->rport); 4894 4895 /* 4896 * Now restop the timers to be sure this is paranoia at is finest! 4897 */ 4898 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4899 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4900 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4901 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4902 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4903 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4904 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4905 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4906 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4907 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4908 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4909 } 4910 4911 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4912 /* 4913 * The chunk lists and such SHOULD be empty but we check them just 4914 * in case. 4915 */ 4916 /* anything on the wheel needs to be removed */ 4917 for (i = 0; i < asoc->streamoutcnt; i++) { 4918 struct sctp_stream_out *outs; 4919 4920 outs = &asoc->strmout[i]; 4921 /* now clean up any chunks here */ 4922 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4923 TAILQ_REMOVE(&outs->outqueue, sp, next); 4924 sctp_free_spbufspace(stcb, asoc, sp); 4925 if (sp->data) { 4926 if (so) { 4927 /* Still an open socket - report */ 4928 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4929 0, (void *)sp, SCTP_SO_LOCKED); 4930 } 4931 if (sp->data) { 4932 sctp_m_freem(sp->data); 4933 sp->data = NULL; 4934 sp->tail_mbuf = NULL; 4935 sp->length = 0; 4936 } 4937 } 4938 if (sp->net) { 4939 sctp_free_remote_addr(sp->net); 4940 sp->net = NULL; 4941 } 4942 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4943 } 4944 } 4945 /* sa_ignore FREED_MEMORY */ 4946 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4947 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4948 SCTP_FREE(strrst, SCTP_M_STRESET); 4949 } 4950 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4951 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4952 if (sq->data) { 4953 sctp_m_freem(sq->data); 4954 sq->data = NULL; 4955 } 4956 sctp_free_remote_addr(sq->whoFrom); 4957 sq->whoFrom = NULL; 4958 sq->stcb = NULL; 4959 /* Free the ctl entry */ 4960 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4961 SCTP_DECR_READQ_COUNT(); 4962 /* sa_ignore FREED_MEMORY */ 4963 } 4964 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4965 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4966 if (chk->data) { 4967 sctp_m_freem(chk->data); 4968 chk->data = NULL; 4969 } 4970 if (chk->holds_key_ref) 4971 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4972 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4973 SCTP_DECR_CHK_COUNT(); 4974 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4975 asoc->free_chunk_cnt--; 4976 /* sa_ignore FREED_MEMORY */ 4977 } 4978 /* pending send queue SHOULD be empty */ 4979 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4980 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4981 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4982 #ifdef INVARIANTS 4983 } else { 4984 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4985 #endif 4986 } 4987 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4988 if (chk->data) { 4989 if (so) { 4990 /* Still a socket? */ 4991 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4992 0, chk, SCTP_SO_LOCKED); 4993 } 4994 if (chk->data) { 4995 sctp_m_freem(chk->data); 4996 chk->data = NULL; 4997 } 4998 } 4999 if (chk->holds_key_ref) 5000 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5001 if (chk->whoTo) { 5002 sctp_free_remote_addr(chk->whoTo); 5003 chk->whoTo = NULL; 5004 } 5005 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5006 SCTP_DECR_CHK_COUNT(); 5007 /* sa_ignore FREED_MEMORY */ 5008 } 5009 /* sent queue SHOULD be empty */ 5010 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5011 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5012 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5013 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5014 #ifdef INVARIANTS 5015 } else { 5016 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5017 #endif 5018 } 5019 } 5020 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5021 if (chk->data) { 5022 if (so) { 5023 /* Still a socket? */ 5024 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5025 0, chk, SCTP_SO_LOCKED); 5026 } 5027 if (chk->data) { 5028 sctp_m_freem(chk->data); 5029 chk->data = NULL; 5030 } 5031 } 5032 if (chk->holds_key_ref) 5033 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5034 sctp_free_remote_addr(chk->whoTo); 5035 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5036 SCTP_DECR_CHK_COUNT(); 5037 /* sa_ignore FREED_MEMORY */ 5038 } 5039 #ifdef INVARIANTS 5040 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5041 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5042 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5043 } 5044 } 5045 #endif 5046 /* control queue MAY not be empty */ 5047 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5048 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5049 if (chk->data) { 5050 sctp_m_freem(chk->data); 5051 chk->data = NULL; 5052 } 5053 if (chk->holds_key_ref) 5054 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5055 sctp_free_remote_addr(chk->whoTo); 5056 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5057 SCTP_DECR_CHK_COUNT(); 5058 /* sa_ignore FREED_MEMORY */ 5059 } 5060 /* ASCONF queue MAY not be empty */ 5061 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5062 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5063 if (chk->data) { 5064 sctp_m_freem(chk->data); 5065 chk->data = NULL; 5066 } 5067 if (chk->holds_key_ref) 5068 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5069 sctp_free_remote_addr(chk->whoTo); 5070 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5071 SCTP_DECR_CHK_COUNT(); 5072 /* sa_ignore FREED_MEMORY */ 5073 } 5074 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5075 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5076 if (chk->data) { 5077 sctp_m_freem(chk->data); 5078 chk->data = NULL; 5079 } 5080 if (chk->holds_key_ref) 5081 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5082 sctp_free_remote_addr(chk->whoTo); 5083 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5084 SCTP_DECR_CHK_COUNT(); 5085 /* sa_ignore FREED_MEMORY */ 5086 } 5087 5088 if (asoc->mapping_array) { 5089 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5090 asoc->mapping_array = NULL; 5091 } 5092 if (asoc->nr_mapping_array) { 5093 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5094 asoc->nr_mapping_array = NULL; 5095 } 5096 /* the stream outs */ 5097 if (asoc->strmout) { 5098 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5099 asoc->strmout = NULL; 5100 } 5101 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5102 if (asoc->strmin) { 5103 struct sctp_queued_to_read *ctl, *nctl; 5104 5105 for (i = 0; i < asoc->streamincnt; i++) { 5106 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5107 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5108 sctp_free_remote_addr(ctl->whoFrom); 5109 if (ctl->data) { 5110 sctp_m_freem(ctl->data); 5111 ctl->data = NULL; 5112 } 5113 /* 5114 * We don't free the address here since all 5115 * the net's were freed above. 5116 */ 5117 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5118 SCTP_DECR_READQ_COUNT(); 5119 } 5120 } 5121 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5122 asoc->strmin = NULL; 5123 } 5124 asoc->streamincnt = 0; 5125 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5126 #ifdef INVARIANTS 5127 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5128 panic("no net's left alloc'ed, or list points to itself"); 5129 } 5130 #endif 5131 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5132 sctp_free_remote_addr(net); 5133 } 5134 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5135 /* sa_ignore FREED_MEMORY */ 5136 sctp_remove_laddr(laddr); 5137 } 5138 5139 /* pending asconf (address) parameters */ 5140 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5141 /* sa_ignore FREED_MEMORY */ 5142 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5143 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5144 } 5145 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5146 /* sa_ignore FREED_MEMORY */ 5147 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5148 if (aack->data != NULL) { 5149 sctp_m_freem(aack->data); 5150 } 5151 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5152 } 5153 /* clean up auth stuff */ 5154 if (asoc->local_hmacs) 5155 sctp_free_hmaclist(asoc->local_hmacs); 5156 if (asoc->peer_hmacs) 5157 sctp_free_hmaclist(asoc->peer_hmacs); 5158 5159 if (asoc->local_auth_chunks) 5160 sctp_free_chunklist(asoc->local_auth_chunks); 5161 if (asoc->peer_auth_chunks) 5162 sctp_free_chunklist(asoc->peer_auth_chunks); 5163 5164 sctp_free_authinfo(&asoc->authinfo); 5165 5166 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5167 LIST_REMOVE(shared_key, next); 5168 sctp_free_sharedkey(shared_key); 5169 /* sa_ignore FREED_MEMORY */ 5170 } 5171 5172 /* Insert new items here :> */ 5173 5174 /* Get rid of LOCK */ 5175 SCTP_TCB_UNLOCK(stcb); 5176 SCTP_TCB_LOCK_DESTROY(stcb); 5177 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5178 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5179 SCTP_INP_INFO_WUNLOCK(); 5180 SCTP_INP_RLOCK(inp); 5181 } 5182 #ifdef SCTP_TRACK_FREED_ASOCS 5183 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5184 /* now clean up the tasoc itself */ 5185 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5186 SCTP_DECR_ASOC_COUNT(); 5187 } else { 5188 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5189 } 5190 #else 5191 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5192 SCTP_DECR_ASOC_COUNT(); 5193 #endif 5194 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5195 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5196 /* 5197 * If its NOT the inp_free calling us AND sctp_close 5198 * as been called, we call back... 5199 */ 5200 SCTP_INP_RUNLOCK(inp); 5201 /* 5202 * This will start the kill timer (if we are the 5203 * last one) since we hold an increment yet. But 5204 * this is the only safe way to do this since 5205 * otherwise if the socket closes at the same time 5206 * we are here we might collide in the cleanup. 5207 */ 5208 sctp_inpcb_free(inp, 5209 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5210 SCTP_CALLED_DIRECTLY_NOCMPSET); 5211 SCTP_INP_DECR_REF(inp); 5212 goto out_of; 5213 } else { 5214 /* The socket is still open. */ 5215 SCTP_INP_DECR_REF(inp); 5216 } 5217 } 5218 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5219 SCTP_INP_RUNLOCK(inp); 5220 } 5221 out_of: 5222 /* destroyed the asoc */ 5223 #ifdef SCTP_LOG_CLOSING 5224 sctp_log_closing(inp, NULL, 11); 5225 #endif 5226 return (1); 5227 } 5228 5229 5230 5231 /* 5232 * determine if a destination is "reachable" based upon the addresses bound 5233 * to the current endpoint (e.g. only v4 or v6 currently bound) 5234 */ 5235 /* 5236 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5237 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5238 * types bound as its endpoint 5239 */ 5240 int 5241 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5242 { 5243 struct sctp_inpcb *inp; 5244 int answer; 5245 5246 /* 5247 * No locks here, the TCB, in all cases is already locked and an 5248 * assoc is up. There is either a INP lock by the caller applied (in 5249 * asconf case when deleting an address) or NOT in the HB case, 5250 * however if HB then the INP increment is up and the INP will not 5251 * be removed (on top of the fact that we have a TCB lock). So we 5252 * only want to read the sctp_flags, which is either bound-all or 5253 * not.. no protection needed since once an assoc is up you can't be 5254 * changing your binding. 5255 */ 5256 inp = stcb->sctp_ep; 5257 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5258 /* if bound all, destination is not restricted */ 5259 /* 5260 * RRS: Question during lock work: Is this correct? If you 5261 * are bound-all you still might need to obey the V4--V6 5262 * flags??? IMO this bound-all stuff needs to be removed! 5263 */ 5264 return (1); 5265 } 5266 /* NOTE: all "scope" checks are done when local addresses are added */ 5267 switch (destaddr->sa_family) { 5268 #ifdef INET6 5269 case AF_INET6: 5270 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5271 break; 5272 #endif 5273 #ifdef INET 5274 case AF_INET: 5275 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5276 break; 5277 #endif 5278 default: 5279 /* invalid family, so it's unreachable */ 5280 answer = 0; 5281 break; 5282 } 5283 return (answer); 5284 } 5285 5286 /* 5287 * update the inp_vflags on an endpoint 5288 */ 5289 static void 5290 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5291 { 5292 struct sctp_laddr *laddr; 5293 5294 /* first clear the flag */ 5295 inp->ip_inp.inp.inp_vflag = 0; 5296 /* set the flag based on addresses on the ep list */ 5297 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5298 if (laddr->ifa == NULL) { 5299 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5300 __FUNCTION__); 5301 continue; 5302 } 5303 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5304 continue; 5305 } 5306 switch (laddr->ifa->address.sa.sa_family) { 5307 #ifdef INET6 5308 case AF_INET6: 5309 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5310 break; 5311 #endif 5312 #ifdef INET 5313 case AF_INET: 5314 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5315 break; 5316 #endif 5317 default: 5318 break; 5319 } 5320 } 5321 } 5322 5323 /* 5324 * Add the address to the endpoint local address list There is nothing to be 5325 * done if we are bound to all addresses 5326 */ 5327 void 5328 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5329 { 5330 struct sctp_laddr *laddr; 5331 int fnd, error = 0; 5332 5333 fnd = 0; 5334 5335 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5336 /* You are already bound to all. You have it already */ 5337 return; 5338 } 5339 #ifdef INET6 5340 if (ifa->address.sa.sa_family == AF_INET6) { 5341 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5342 /* Can't bind a non-useable addr. */ 5343 return; 5344 } 5345 } 5346 #endif 5347 /* first, is it already present? */ 5348 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5349 if (laddr->ifa == ifa) { 5350 fnd = 1; 5351 break; 5352 } 5353 } 5354 5355 if (fnd == 0) { 5356 /* Not in the ep list */ 5357 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5358 if (error != 0) 5359 return; 5360 inp->laddr_count++; 5361 /* update inp_vflag flags */ 5362 switch (ifa->address.sa.sa_family) { 5363 #ifdef INET6 5364 case AF_INET6: 5365 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5366 break; 5367 #endif 5368 #ifdef INET 5369 case AF_INET: 5370 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5371 break; 5372 #endif 5373 default: 5374 break; 5375 } 5376 } 5377 return; 5378 } 5379 5380 5381 /* 5382 * select a new (hopefully reachable) destination net (should only be used 5383 * when we deleted an ep addr that is the only usable source address to reach 5384 * the destination net) 5385 */ 5386 static void 5387 sctp_select_primary_destination(struct sctp_tcb *stcb) 5388 { 5389 struct sctp_nets *net; 5390 5391 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5392 /* for now, we'll just pick the first reachable one we find */ 5393 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5394 continue; 5395 if (sctp_destination_is_reachable(stcb, 5396 (struct sockaddr *)&net->ro._l_addr)) { 5397 /* found a reachable destination */ 5398 stcb->asoc.primary_destination = net; 5399 } 5400 } 5401 /* I can't there from here! ...we're gonna die shortly... */ 5402 } 5403 5404 5405 /* 5406 * Delete the address from the endpoint local address list There is nothing 5407 * to be done if we are bound to all addresses 5408 */ 5409 void 5410 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5411 { 5412 struct sctp_laddr *laddr; 5413 int fnd; 5414 5415 fnd = 0; 5416 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5417 /* You are already bound to all. You have it already */ 5418 return; 5419 } 5420 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5421 if (laddr->ifa == ifa) { 5422 fnd = 1; 5423 break; 5424 } 5425 } 5426 if (fnd && (inp->laddr_count < 2)) { 5427 /* can't delete unless there are at LEAST 2 addresses */ 5428 return; 5429 } 5430 if (fnd) { 5431 /* 5432 * clean up any use of this address go through our 5433 * associations and clear any last_used_address that match 5434 * this one for each assoc, see if a new primary_destination 5435 * is needed 5436 */ 5437 struct sctp_tcb *stcb; 5438 5439 /* clean up "next_addr_touse" */ 5440 if (inp->next_addr_touse == laddr) 5441 /* delete this address */ 5442 inp->next_addr_touse = NULL; 5443 5444 /* clean up "last_used_address" */ 5445 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5446 struct sctp_nets *net; 5447 5448 SCTP_TCB_LOCK(stcb); 5449 if (stcb->asoc.last_used_address == laddr) 5450 /* delete this address */ 5451 stcb->asoc.last_used_address = NULL; 5452 /* 5453 * Now spin through all the nets and purge any ref 5454 * to laddr 5455 */ 5456 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5457 if (net->ro._s_addr && 5458 (net->ro._s_addr->ifa == laddr->ifa)) { 5459 /* Yep, purge src address selected */ 5460 sctp_rtentry_t *rt; 5461 5462 /* delete this address if cached */ 5463 rt = net->ro.ro_rt; 5464 if (rt != NULL) { 5465 RTFREE(rt); 5466 net->ro.ro_rt = NULL; 5467 } 5468 sctp_free_ifa(net->ro._s_addr); 5469 net->ro._s_addr = NULL; 5470 net->src_addr_selected = 0; 5471 } 5472 } 5473 SCTP_TCB_UNLOCK(stcb); 5474 } /* for each tcb */ 5475 /* remove it from the ep list */ 5476 sctp_remove_laddr(laddr); 5477 inp->laddr_count--; 5478 /* update inp_vflag flags */ 5479 sctp_update_ep_vflag(inp); 5480 } 5481 return; 5482 } 5483 5484 /* 5485 * Add the address to the TCB local address restricted list. 5486 * This is a "pending" address list (eg. addresses waiting for an 5487 * ASCONF-ACK response) and cannot be used as a valid source address. 5488 */ 5489 void 5490 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5491 { 5492 struct sctp_laddr *laddr; 5493 struct sctpladdr *list; 5494 5495 /* 5496 * Assumes TCB is locked.. and possibly the INP. May need to 5497 * confirm/fix that if we need it and is not the case. 5498 */ 5499 list = &stcb->asoc.sctp_restricted_addrs; 5500 5501 #ifdef INET6 5502 if (ifa->address.sa.sa_family == AF_INET6) { 5503 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5504 /* Can't bind a non-existent addr. */ 5505 return; 5506 } 5507 } 5508 #endif 5509 /* does the address already exist? */ 5510 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5511 if (laddr->ifa == ifa) { 5512 return; 5513 } 5514 } 5515 5516 /* add to the list */ 5517 (void)sctp_insert_laddr(list, ifa, 0); 5518 return; 5519 } 5520 5521 /* 5522 * insert an laddr entry with the given ifa for the desired list 5523 */ 5524 int 5525 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5526 { 5527 struct sctp_laddr *laddr; 5528 5529 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5530 if (laddr == NULL) { 5531 /* out of memory? */ 5532 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5533 return (EINVAL); 5534 } 5535 SCTP_INCR_LADDR_COUNT(); 5536 bzero(laddr, sizeof(*laddr)); 5537 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5538 laddr->ifa = ifa; 5539 laddr->action = act; 5540 atomic_add_int(&ifa->refcount, 1); 5541 /* insert it */ 5542 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5543 5544 return (0); 5545 } 5546 5547 /* 5548 * Remove an laddr entry from the local address list (on an assoc) 5549 */ 5550 void 5551 sctp_remove_laddr(struct sctp_laddr *laddr) 5552 { 5553 5554 /* remove from the list */ 5555 LIST_REMOVE(laddr, sctp_nxt_addr); 5556 sctp_free_ifa(laddr->ifa); 5557 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5558 SCTP_DECR_LADDR_COUNT(); 5559 } 5560 5561 /* 5562 * Remove a local address from the TCB local address restricted list 5563 */ 5564 void 5565 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5566 { 5567 struct sctp_inpcb *inp; 5568 struct sctp_laddr *laddr; 5569 5570 /* 5571 * This is called by asconf work. It is assumed that a) The TCB is 5572 * locked and b) The INP is locked. This is true in as much as I can 5573 * trace through the entry asconf code where I did these locks. 5574 * Again, the ASCONF code is a bit different in that it does lock 5575 * the INP during its work often times. This must be since we don't 5576 * want other proc's looking up things while what they are looking 5577 * up is changing :-D 5578 */ 5579 5580 inp = stcb->sctp_ep; 5581 /* if subset bound and don't allow ASCONF's, can't delete last */ 5582 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5583 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5584 if (stcb->sctp_ep->laddr_count < 2) { 5585 /* can't delete last address */ 5586 return; 5587 } 5588 } 5589 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5590 /* remove the address if it exists */ 5591 if (laddr->ifa == NULL) 5592 continue; 5593 if (laddr->ifa == ifa) { 5594 sctp_remove_laddr(laddr); 5595 return; 5596 } 5597 } 5598 5599 /* address not found! */ 5600 return; 5601 } 5602 5603 /* 5604 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5605 */ 5606 /* sysctl */ 5607 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5608 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5609 5610 5611 5612 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5613 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5614 int *sctp_cpuarry = NULL; 5615 void 5616 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5617 { 5618 /* Queue a packet to a processor for the specified core */ 5619 struct sctp_mcore_queue *qent; 5620 struct sctp_mcore_ctrl *wkq; 5621 int need_wake = 0; 5622 5623 if (sctp_mcore_workers == NULL) { 5624 /* Something went way bad during setup */ 5625 sctp_input_with_port(m, off, 0); 5626 return; 5627 } 5628 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5629 (sizeof(struct sctp_mcore_queue)), 5630 SCTP_M_MCORE); 5631 if (qent == NULL) { 5632 /* This is trouble */ 5633 sctp_input_with_port(m, off, 0); 5634 return; 5635 } 5636 qent->vn = curvnet; 5637 qent->m = m; 5638 qent->off = off; 5639 qent->v6 = 0; 5640 wkq = &sctp_mcore_workers[cpu_to_use]; 5641 SCTP_MCORE_QLOCK(wkq); 5642 5643 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5644 if (wkq->running == 0) { 5645 need_wake = 1; 5646 } 5647 SCTP_MCORE_QUNLOCK(wkq); 5648 if (need_wake) { 5649 wakeup(&wkq->running); 5650 } 5651 } 5652 5653 static void 5654 sctp_mcore_thread(void *arg) 5655 { 5656 5657 struct sctp_mcore_ctrl *wkq; 5658 struct sctp_mcore_queue *qent; 5659 5660 wkq = (struct sctp_mcore_ctrl *)arg; 5661 struct mbuf *m; 5662 int off, v6; 5663 5664 /* Wait for first tickle */ 5665 SCTP_MCORE_LOCK(wkq); 5666 wkq->running = 0; 5667 msleep(&wkq->running, 5668 &wkq->core_mtx, 5669 0, "wait for pkt", 0); 5670 SCTP_MCORE_UNLOCK(wkq); 5671 5672 /* Bind to our cpu */ 5673 thread_lock(curthread); 5674 sched_bind(curthread, wkq->cpuid); 5675 thread_unlock(curthread); 5676 5677 /* Now lets start working */ 5678 SCTP_MCORE_LOCK(wkq); 5679 /* Now grab lock and go */ 5680 for (;;) { 5681 SCTP_MCORE_QLOCK(wkq); 5682 skip_sleep: 5683 wkq->running = 1; 5684 qent = TAILQ_FIRST(&wkq->que); 5685 if (qent) { 5686 TAILQ_REMOVE(&wkq->que, qent, next); 5687 SCTP_MCORE_QUNLOCK(wkq); 5688 CURVNET_SET(qent->vn); 5689 m = qent->m; 5690 off = qent->off; 5691 v6 = qent->v6; 5692 SCTP_FREE(qent, SCTP_M_MCORE); 5693 if (v6 == 0) { 5694 sctp_input_with_port(m, off, 0); 5695 } else { 5696 SCTP_PRINTF("V6 not yet supported\n"); 5697 sctp_m_freem(m); 5698 } 5699 CURVNET_RESTORE(); 5700 SCTP_MCORE_QLOCK(wkq); 5701 } 5702 wkq->running = 0; 5703 if (!TAILQ_EMPTY(&wkq->que)) { 5704 goto skip_sleep; 5705 } 5706 SCTP_MCORE_QUNLOCK(wkq); 5707 msleep(&wkq->running, 5708 &wkq->core_mtx, 5709 0, "wait for pkt", 0); 5710 } 5711 } 5712 5713 static void 5714 sctp_startup_mcore_threads(void) 5715 { 5716 int i, cpu; 5717 5718 if (mp_ncpus == 1) 5719 return; 5720 5721 if (sctp_mcore_workers != NULL) { 5722 /* 5723 * Already been here in some previous vnet? 5724 */ 5725 return; 5726 } 5727 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5728 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5729 SCTP_M_MCORE); 5730 if (sctp_mcore_workers == NULL) { 5731 /* TSNH I hope */ 5732 return; 5733 } 5734 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5735 sizeof(struct sctp_mcore_ctrl))); 5736 /* Init the structures */ 5737 for (i = 0; i <= mp_maxid; i++) { 5738 TAILQ_INIT(&sctp_mcore_workers[i].que); 5739 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5740 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5741 sctp_mcore_workers[i].cpuid = i; 5742 } 5743 if (sctp_cpuarry == NULL) { 5744 SCTP_MALLOC(sctp_cpuarry, int *, 5745 (mp_ncpus * sizeof(int)), 5746 SCTP_M_MCORE); 5747 i = 0; 5748 CPU_FOREACH(cpu) { 5749 sctp_cpuarry[i] = cpu; 5750 i++; 5751 } 5752 } 5753 /* Now start them all */ 5754 CPU_FOREACH(cpu) { 5755 (void)kproc_create(sctp_mcore_thread, 5756 (void *)&sctp_mcore_workers[cpu], 5757 &sctp_mcore_workers[cpu].thread_proc, 5758 RFPROC, 5759 SCTP_KTHREAD_PAGES, 5760 SCTP_MCORE_NAME); 5761 5762 } 5763 } 5764 5765 #endif 5766 5767 void 5768 sctp_pcb_init() 5769 { 5770 /* 5771 * SCTP initialization for the PCB structures should be called by 5772 * the sctp_init() funciton. 5773 */ 5774 int i; 5775 struct timeval tv; 5776 5777 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5778 /* error I was called twice */ 5779 return; 5780 } 5781 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5782 5783 #if defined(SCTP_LOCAL_TRACE_BUF) 5784 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5785 #endif 5786 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5787 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5788 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5789 SCTP_M_MCORE); 5790 #endif 5791 (void)SCTP_GETTIME_TIMEVAL(&tv); 5792 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5793 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5794 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5795 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5796 #else 5797 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5798 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5799 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5800 #endif 5801 /* init the empty list of (All) Endpoints */ 5802 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5803 5804 5805 /* init the hash table of endpoints */ 5806 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5807 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5808 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5809 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5810 &SCTP_BASE_INFO(hashasocmark)); 5811 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5812 &SCTP_BASE_INFO(hashmark)); 5813 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5814 &SCTP_BASE_INFO(hashtcpmark)); 5815 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5816 5817 5818 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5819 &SCTP_BASE_INFO(hashvrfmark)); 5820 5821 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5822 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5823 /* init the zones */ 5824 /* 5825 * FIX ME: Should check for NULL returns, but if it does fail we are 5826 * doomed to panic anyways... add later maybe. 5827 */ 5828 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5829 sizeof(struct sctp_inpcb), maxsockets); 5830 5831 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5832 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5833 5834 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5835 sizeof(struct sctp_laddr), 5836 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5837 5838 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5839 sizeof(struct sctp_nets), 5840 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5841 5842 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5843 sizeof(struct sctp_tmit_chunk), 5844 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5845 5846 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5847 sizeof(struct sctp_queued_to_read), 5848 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5849 5850 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5851 sizeof(struct sctp_stream_queue_pending), 5852 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5853 5854 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5855 sizeof(struct sctp_asconf), 5856 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5857 5858 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5859 sizeof(struct sctp_asconf_ack), 5860 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5861 5862 5863 /* Master Lock INIT for info structure */ 5864 SCTP_INP_INFO_LOCK_INIT(); 5865 SCTP_STATLOG_INIT_LOCK(); 5866 5867 SCTP_IPI_COUNT_INIT(); 5868 SCTP_IPI_ADDR_INIT(); 5869 #ifdef SCTP_PACKET_LOGGING 5870 SCTP_IP_PKTLOG_INIT(); 5871 #endif 5872 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5873 5874 SCTP_WQ_ADDR_INIT(); 5875 /* not sure if we need all the counts */ 5876 SCTP_BASE_INFO(ipi_count_ep) = 0; 5877 /* assoc/tcb zone info */ 5878 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5879 /* local addrlist zone info */ 5880 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5881 /* remote addrlist zone info */ 5882 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5883 /* chunk info */ 5884 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5885 5886 /* socket queue zone info */ 5887 SCTP_BASE_INFO(ipi_count_readq) = 0; 5888 5889 /* stream out queue cont */ 5890 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5891 5892 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5893 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5894 5895 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5896 5897 /* Init the TIMEWAIT list */ 5898 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5899 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5900 } 5901 sctp_startup_iterator(); 5902 5903 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5904 sctp_startup_mcore_threads(); 5905 #endif 5906 5907 /* 5908 * INIT the default VRF which for BSD is the only one, other O/S's 5909 * may have more. But initially they must start with one and then 5910 * add the VRF's as addresses are added. 5911 */ 5912 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5913 } 5914 5915 /* 5916 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5917 */ 5918 void 5919 sctp_pcb_finish(void) 5920 { 5921 struct sctp_vrflist *vrf_bucket; 5922 struct sctp_vrf *vrf, *nvrf; 5923 struct sctp_ifn *ifn, *nifn; 5924 struct sctp_ifa *ifa, *nifa; 5925 struct sctpvtaghead *chain; 5926 struct sctp_tagblock *twait_block, *prev_twait_block; 5927 struct sctp_laddr *wi, *nwi; 5928 int i; 5929 struct sctp_iterator *it, *nit; 5930 5931 /* 5932 * In FreeBSD the iterator thread never exits but we do clean up. 5933 * The only way FreeBSD reaches here is if we have VRF's but we 5934 * still add the ifdef to make it compile on old versions. 5935 */ 5936 SCTP_IPI_ITERATOR_WQ_LOCK(); 5937 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5938 if (it->vn != curvnet) { 5939 continue; 5940 } 5941 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5942 if (it->function_atend != NULL) { 5943 (*it->function_atend) (it->pointer, it->val); 5944 } 5945 SCTP_FREE(it, SCTP_M_ITER); 5946 } 5947 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5948 SCTP_ITERATOR_LOCK(); 5949 if ((sctp_it_ctl.cur_it) && 5950 (sctp_it_ctl.cur_it->vn == curvnet)) { 5951 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5952 } 5953 SCTP_ITERATOR_UNLOCK(); 5954 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5955 SCTP_WQ_ADDR_LOCK(); 5956 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5957 LIST_REMOVE(wi, sctp_nxt_addr); 5958 SCTP_DECR_LADDR_COUNT(); 5959 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5960 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5961 } 5962 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5963 } 5964 SCTP_WQ_ADDR_UNLOCK(); 5965 5966 /* 5967 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5968 * destroyed first). 5969 */ 5970 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5971 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5972 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5973 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5974 /* free the ifa */ 5975 LIST_REMOVE(ifa, next_bucket); 5976 LIST_REMOVE(ifa, next_ifa); 5977 SCTP_FREE(ifa, SCTP_M_IFA); 5978 } 5979 /* free the ifn */ 5980 LIST_REMOVE(ifn, next_bucket); 5981 LIST_REMOVE(ifn, next_ifn); 5982 SCTP_FREE(ifn, SCTP_M_IFN); 5983 } 5984 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5985 /* free the vrf */ 5986 LIST_REMOVE(vrf, next_vrf); 5987 SCTP_FREE(vrf, SCTP_M_VRF); 5988 } 5989 /* free the vrf hashes */ 5990 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5991 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5992 5993 /* 5994 * free the TIMEWAIT list elements malloc'd in the function 5995 * sctp_add_vtag_to_timewait()... 5996 */ 5997 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5998 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5999 if (!LIST_EMPTY(chain)) { 6000 prev_twait_block = NULL; 6001 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6002 if (prev_twait_block) { 6003 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6004 } 6005 prev_twait_block = twait_block; 6006 } 6007 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6008 } 6009 } 6010 6011 /* free the locks and mutexes */ 6012 #ifdef SCTP_PACKET_LOGGING 6013 SCTP_IP_PKTLOG_DESTROY(); 6014 #endif 6015 SCTP_IPI_ADDR_DESTROY(); 6016 SCTP_STATLOG_DESTROY(); 6017 SCTP_INP_INFO_LOCK_DESTROY(); 6018 6019 SCTP_WQ_ADDR_DESTROY(); 6020 6021 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6022 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6023 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6024 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6025 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6026 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6027 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6028 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6029 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6030 /* Get rid of other stuff to */ 6031 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6032 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6033 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6034 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6035 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6036 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6037 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6038 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6039 #endif 6040 } 6041 6042 6043 int 6044 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6045 int offset, int limit, 6046 struct sockaddr *src, struct sockaddr *dst, 6047 struct sockaddr *altsa) 6048 { 6049 /* 6050 * grub through the INIT pulling addresses and loading them to the 6051 * nets structure in the asoc. The from address in the mbuf should 6052 * also be loaded (if it is not already). This routine can be called 6053 * with either INIT or INIT-ACK's as long as the m points to the IP 6054 * packet and the offset points to the beginning of the parameters. 6055 */ 6056 struct sctp_inpcb *inp; 6057 struct sctp_nets *net, *nnet, *net_tmp; 6058 struct sctp_paramhdr *phdr, parm_buf; 6059 struct sctp_tcb *stcb_tmp; 6060 uint16_t ptype, plen; 6061 struct sockaddr *sa; 6062 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6063 struct sctp_auth_random *p_random = NULL; 6064 uint16_t random_len = 0; 6065 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6066 struct sctp_auth_hmac_algo *hmacs = NULL; 6067 uint16_t hmacs_len = 0; 6068 uint8_t saw_asconf = 0; 6069 uint8_t saw_asconf_ack = 0; 6070 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6071 struct sctp_auth_chunk_list *chunks = NULL; 6072 uint16_t num_chunks = 0; 6073 sctp_key_t *new_key; 6074 uint32_t keylen; 6075 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6076 uint8_t peer_supports_ecn; 6077 uint8_t peer_supports_prsctp; 6078 uint8_t peer_supports_auth; 6079 uint8_t peer_supports_asconf; 6080 uint8_t peer_supports_asconf_ack; 6081 uint8_t peer_supports_reconfig; 6082 uint8_t peer_supports_nrsack; 6083 uint8_t peer_supports_pktdrop; 6084 6085 #ifdef INET 6086 struct sockaddr_in sin; 6087 6088 #endif 6089 #ifdef INET6 6090 struct sockaddr_in6 sin6; 6091 6092 #endif 6093 6094 /* First get the destination address setup too. */ 6095 #ifdef INET 6096 memset(&sin, 0, sizeof(sin)); 6097 sin.sin_family = AF_INET; 6098 sin.sin_len = sizeof(sin); 6099 sin.sin_port = stcb->rport; 6100 #endif 6101 #ifdef INET6 6102 memset(&sin6, 0, sizeof(sin6)); 6103 sin6.sin6_family = AF_INET6; 6104 sin6.sin6_len = sizeof(struct sockaddr_in6); 6105 sin6.sin6_port = stcb->rport; 6106 #endif 6107 if (altsa) { 6108 sa = altsa; 6109 } else { 6110 sa = src; 6111 } 6112 peer_supports_ecn = 0; 6113 peer_supports_prsctp = 0; 6114 peer_supports_auth = 0; 6115 peer_supports_asconf = 0; 6116 peer_supports_reconfig = 0; 6117 peer_supports_nrsack = 0; 6118 peer_supports_pktdrop = 0; 6119 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6120 /* mark all addresses that we have currently on the list */ 6121 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6122 } 6123 /* does the source address already exist? if so skip it */ 6124 inp = stcb->sctp_ep; 6125 atomic_add_int(&stcb->asoc.refcnt, 1); 6126 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6127 atomic_add_int(&stcb->asoc.refcnt, -1); 6128 6129 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6130 /* we must add the source address */ 6131 /* no scope set here since we have a tcb already. */ 6132 switch (sa->sa_family) { 6133 #ifdef INET 6134 case AF_INET: 6135 if (stcb->asoc.scope.ipv4_addr_legal) { 6136 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6137 return (-1); 6138 } 6139 } 6140 break; 6141 #endif 6142 #ifdef INET6 6143 case AF_INET6: 6144 if (stcb->asoc.scope.ipv6_addr_legal) { 6145 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6146 return (-2); 6147 } 6148 } 6149 break; 6150 #endif 6151 default: 6152 break; 6153 } 6154 } else { 6155 if (net_tmp != NULL && stcb_tmp == stcb) { 6156 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6157 } else if (stcb_tmp != stcb) { 6158 /* It belongs to another association? */ 6159 if (stcb_tmp) 6160 SCTP_TCB_UNLOCK(stcb_tmp); 6161 return (-3); 6162 } 6163 } 6164 if (stcb->asoc.state == 0) { 6165 /* the assoc was freed? */ 6166 return (-4); 6167 } 6168 /* now we must go through each of the params. */ 6169 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6170 while (phdr) { 6171 ptype = ntohs(phdr->param_type); 6172 plen = ntohs(phdr->param_length); 6173 /* 6174 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6175 * (uint32_t)ptype, (int)plen); 6176 */ 6177 if (offset + plen > limit) { 6178 break; 6179 } 6180 if (plen == 0) { 6181 break; 6182 } 6183 #ifdef INET 6184 if (ptype == SCTP_IPV4_ADDRESS) { 6185 if (stcb->asoc.scope.ipv4_addr_legal) { 6186 struct sctp_ipv4addr_param *p4, p4_buf; 6187 6188 /* ok get the v4 address and check/add */ 6189 phdr = sctp_get_next_param(m, offset, 6190 (struct sctp_paramhdr *)&p4_buf, 6191 sizeof(p4_buf)); 6192 if (plen != sizeof(struct sctp_ipv4addr_param) || 6193 phdr == NULL) { 6194 return (-5); 6195 } 6196 p4 = (struct sctp_ipv4addr_param *)phdr; 6197 sin.sin_addr.s_addr = p4->addr; 6198 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6199 /* Skip multi-cast addresses */ 6200 goto next_param; 6201 } 6202 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6203 (sin.sin_addr.s_addr == INADDR_ANY)) { 6204 goto next_param; 6205 } 6206 sa = (struct sockaddr *)&sin; 6207 inp = stcb->sctp_ep; 6208 atomic_add_int(&stcb->asoc.refcnt, 1); 6209 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6210 dst, stcb); 6211 atomic_add_int(&stcb->asoc.refcnt, -1); 6212 6213 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6214 inp == NULL) { 6215 /* we must add the source address */ 6216 /* 6217 * no scope set since we have a tcb 6218 * already 6219 */ 6220 6221 /* 6222 * we must validate the state again 6223 * here 6224 */ 6225 add_it_now: 6226 if (stcb->asoc.state == 0) { 6227 /* the assoc was freed? */ 6228 return (-7); 6229 } 6230 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6231 return (-8); 6232 } 6233 } else if (stcb_tmp == stcb) { 6234 if (stcb->asoc.state == 0) { 6235 /* the assoc was freed? */ 6236 return (-10); 6237 } 6238 if (net != NULL) { 6239 /* clear flag */ 6240 net->dest_state &= 6241 ~SCTP_ADDR_NOT_IN_ASSOC; 6242 } 6243 } else { 6244 /* 6245 * strange, address is in another 6246 * assoc? straighten out locks. 6247 */ 6248 if (stcb_tmp) { 6249 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6250 /* 6251 * in setup state we 6252 * abort this guy 6253 */ 6254 sctp_abort_an_association(stcb_tmp->sctp_ep, 6255 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6256 goto add_it_now; 6257 } 6258 SCTP_TCB_UNLOCK(stcb_tmp); 6259 } 6260 if (stcb->asoc.state == 0) { 6261 /* the assoc was freed? */ 6262 return (-12); 6263 } 6264 return (-13); 6265 } 6266 } 6267 } else 6268 #endif 6269 #ifdef INET6 6270 if (ptype == SCTP_IPV6_ADDRESS) { 6271 if (stcb->asoc.scope.ipv6_addr_legal) { 6272 /* ok get the v6 address and check/add */ 6273 struct sctp_ipv6addr_param *p6, p6_buf; 6274 6275 phdr = sctp_get_next_param(m, offset, 6276 (struct sctp_paramhdr *)&p6_buf, 6277 sizeof(p6_buf)); 6278 if (plen != sizeof(struct sctp_ipv6addr_param) || 6279 phdr == NULL) { 6280 return (-14); 6281 } 6282 p6 = (struct sctp_ipv6addr_param *)phdr; 6283 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6284 sizeof(p6->addr)); 6285 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6286 /* Skip multi-cast addresses */ 6287 goto next_param; 6288 } 6289 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6290 /* 6291 * Link local make no sense without 6292 * scope 6293 */ 6294 goto next_param; 6295 } 6296 sa = (struct sockaddr *)&sin6; 6297 inp = stcb->sctp_ep; 6298 atomic_add_int(&stcb->asoc.refcnt, 1); 6299 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6300 dst, stcb); 6301 atomic_add_int(&stcb->asoc.refcnt, -1); 6302 if (stcb_tmp == NULL && 6303 (inp == stcb->sctp_ep || inp == NULL)) { 6304 /* 6305 * we must validate the state again 6306 * here 6307 */ 6308 add_it_now6: 6309 if (stcb->asoc.state == 0) { 6310 /* the assoc was freed? */ 6311 return (-16); 6312 } 6313 /* 6314 * we must add the address, no scope 6315 * set 6316 */ 6317 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6318 return (-17); 6319 } 6320 } else if (stcb_tmp == stcb) { 6321 /* 6322 * we must validate the state again 6323 * here 6324 */ 6325 if (stcb->asoc.state == 0) { 6326 /* the assoc was freed? */ 6327 return (-19); 6328 } 6329 if (net != NULL) { 6330 /* clear flag */ 6331 net->dest_state &= 6332 ~SCTP_ADDR_NOT_IN_ASSOC; 6333 } 6334 } else { 6335 /* 6336 * strange, address is in another 6337 * assoc? straighten out locks. 6338 */ 6339 if (stcb_tmp) 6340 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6341 /* 6342 * in setup state we 6343 * abort this guy 6344 */ 6345 sctp_abort_an_association(stcb_tmp->sctp_ep, 6346 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6347 goto add_it_now6; 6348 } 6349 SCTP_TCB_UNLOCK(stcb_tmp); 6350 6351 if (stcb->asoc.state == 0) { 6352 /* the assoc was freed? */ 6353 return (-21); 6354 } 6355 return (-22); 6356 } 6357 } 6358 } else 6359 #endif 6360 if (ptype == SCTP_ECN_CAPABLE) { 6361 peer_supports_ecn = 1; 6362 } else if (ptype == SCTP_ULP_ADAPTATION) { 6363 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6364 struct sctp_adaptation_layer_indication ai, 6365 *aip; 6366 6367 phdr = sctp_get_next_param(m, offset, 6368 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6369 aip = (struct sctp_adaptation_layer_indication *)phdr; 6370 if (aip) { 6371 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6372 stcb->asoc.adaptation_needed = 1; 6373 } 6374 } 6375 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6376 struct sctp_asconf_addr_param lstore, *fee; 6377 int lptype; 6378 struct sockaddr *lsa = NULL; 6379 6380 #ifdef INET 6381 struct sctp_asconf_addrv4_param *fii; 6382 6383 #endif 6384 6385 if (stcb->asoc.asconf_supported == 0) { 6386 return (-100); 6387 } 6388 if (plen > sizeof(lstore)) { 6389 return (-23); 6390 } 6391 phdr = sctp_get_next_param(m, offset, 6392 (struct sctp_paramhdr *)&lstore, 6393 min(plen, sizeof(lstore))); 6394 if (phdr == NULL) { 6395 return (-24); 6396 } 6397 fee = (struct sctp_asconf_addr_param *)phdr; 6398 lptype = ntohs(fee->addrp.ph.param_type); 6399 switch (lptype) { 6400 #ifdef INET 6401 case SCTP_IPV4_ADDRESS: 6402 if (plen != 6403 sizeof(struct sctp_asconf_addrv4_param)) { 6404 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6405 (int)sizeof(struct sctp_asconf_addrv4_param), 6406 plen); 6407 } else { 6408 fii = (struct sctp_asconf_addrv4_param *)fee; 6409 sin.sin_addr.s_addr = fii->addrp.addr; 6410 lsa = (struct sockaddr *)&sin; 6411 } 6412 break; 6413 #endif 6414 #ifdef INET6 6415 case SCTP_IPV6_ADDRESS: 6416 if (plen != 6417 sizeof(struct sctp_asconf_addr_param)) { 6418 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6419 (int)sizeof(struct sctp_asconf_addr_param), 6420 plen); 6421 } else { 6422 memcpy(sin6.sin6_addr.s6_addr, 6423 fee->addrp.addr, 6424 sizeof(fee->addrp.addr)); 6425 lsa = (struct sockaddr *)&sin6; 6426 } 6427 break; 6428 #endif 6429 default: 6430 break; 6431 } 6432 if (lsa) { 6433 (void)sctp_set_primary_addr(stcb, sa, NULL); 6434 } 6435 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6436 stcb->asoc.peer_supports_nat = 1; 6437 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6438 /* Peer supports pr-sctp */ 6439 peer_supports_prsctp = 1; 6440 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6441 /* A supported extension chunk */ 6442 struct sctp_supported_chunk_types_param *pr_supported; 6443 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6444 int num_ent, i; 6445 6446 phdr = sctp_get_next_param(m, offset, 6447 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6448 if (phdr == NULL) { 6449 return (-25); 6450 } 6451 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6452 num_ent = plen - sizeof(struct sctp_paramhdr); 6453 for (i = 0; i < num_ent; i++) { 6454 switch (pr_supported->chunk_types[i]) { 6455 case SCTP_ASCONF: 6456 peer_supports_asconf = 1; 6457 break; 6458 case SCTP_ASCONF_ACK: 6459 peer_supports_asconf_ack = 1; 6460 break; 6461 case SCTP_FORWARD_CUM_TSN: 6462 peer_supports_prsctp = 1; 6463 break; 6464 case SCTP_PACKET_DROPPED: 6465 peer_supports_pktdrop = 1; 6466 break; 6467 case SCTP_NR_SELECTIVE_ACK: 6468 peer_supports_nrsack = 1; 6469 break; 6470 case SCTP_STREAM_RESET: 6471 peer_supports_reconfig = 1; 6472 break; 6473 case SCTP_AUTHENTICATION: 6474 peer_supports_auth = 1; 6475 break; 6476 default: 6477 /* one I have not learned yet */ 6478 break; 6479 6480 } 6481 } 6482 } else if (ptype == SCTP_RANDOM) { 6483 if (plen > sizeof(random_store)) 6484 break; 6485 if (got_random) { 6486 /* already processed a RANDOM */ 6487 goto next_param; 6488 } 6489 phdr = sctp_get_next_param(m, offset, 6490 (struct sctp_paramhdr *)random_store, 6491 min(sizeof(random_store), plen)); 6492 if (phdr == NULL) 6493 return (-26); 6494 p_random = (struct sctp_auth_random *)phdr; 6495 random_len = plen - sizeof(*p_random); 6496 /* enforce the random length */ 6497 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6498 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6499 return (-27); 6500 } 6501 got_random = 1; 6502 } else if (ptype == SCTP_HMAC_LIST) { 6503 uint16_t num_hmacs; 6504 uint16_t i; 6505 6506 if (plen > sizeof(hmacs_store)) 6507 break; 6508 if (got_hmacs) { 6509 /* already processed a HMAC list */ 6510 goto next_param; 6511 } 6512 phdr = sctp_get_next_param(m, offset, 6513 (struct sctp_paramhdr *)hmacs_store, 6514 min(plen, sizeof(hmacs_store))); 6515 if (phdr == NULL) 6516 return (-28); 6517 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6518 hmacs_len = plen - sizeof(*hmacs); 6519 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6520 /* validate the hmac list */ 6521 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6522 return (-29); 6523 } 6524 if (stcb->asoc.peer_hmacs != NULL) 6525 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6526 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6527 if (stcb->asoc.peer_hmacs != NULL) { 6528 for (i = 0; i < num_hmacs; i++) { 6529 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6530 ntohs(hmacs->hmac_ids[i])); 6531 } 6532 } 6533 got_hmacs = 1; 6534 } else if (ptype == SCTP_CHUNK_LIST) { 6535 int i; 6536 6537 if (plen > sizeof(chunks_store)) 6538 break; 6539 if (got_chklist) { 6540 /* already processed a Chunks list */ 6541 goto next_param; 6542 } 6543 phdr = sctp_get_next_param(m, offset, 6544 (struct sctp_paramhdr *)chunks_store, 6545 min(plen, sizeof(chunks_store))); 6546 if (phdr == NULL) 6547 return (-30); 6548 chunks = (struct sctp_auth_chunk_list *)phdr; 6549 num_chunks = plen - sizeof(*chunks); 6550 if (stcb->asoc.peer_auth_chunks != NULL) 6551 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6552 else 6553 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6554 for (i = 0; i < num_chunks; i++) { 6555 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6556 stcb->asoc.peer_auth_chunks); 6557 /* record asconf/asconf-ack if listed */ 6558 if (chunks->chunk_types[i] == SCTP_ASCONF) 6559 saw_asconf = 1; 6560 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6561 saw_asconf_ack = 1; 6562 6563 } 6564 got_chklist = 1; 6565 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6566 (ptype == SCTP_STATE_COOKIE) || 6567 (ptype == SCTP_UNRECOG_PARAM) || 6568 (ptype == SCTP_COOKIE_PRESERVE) || 6569 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6570 (ptype == SCTP_ADD_IP_ADDRESS) || 6571 (ptype == SCTP_DEL_IP_ADDRESS) || 6572 (ptype == SCTP_ERROR_CAUSE_IND) || 6573 (ptype == SCTP_SUCCESS_REPORT)) { 6574 /* don't care */ ; 6575 } else { 6576 if ((ptype & 0x8000) == 0x0000) { 6577 /* 6578 * must stop processing the rest of the 6579 * param's. Any report bits were handled 6580 * with the call to 6581 * sctp_arethere_unrecognized_parameters() 6582 * when the INIT or INIT-ACK was first seen. 6583 */ 6584 break; 6585 } 6586 } 6587 6588 next_param: 6589 offset += SCTP_SIZE32(plen); 6590 if (offset >= limit) { 6591 break; 6592 } 6593 phdr = sctp_get_next_param(m, offset, &parm_buf, 6594 sizeof(parm_buf)); 6595 } 6596 /* Now check to see if we need to purge any addresses */ 6597 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6598 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6599 SCTP_ADDR_NOT_IN_ASSOC) { 6600 /* This address has been removed from the asoc */ 6601 /* remove and free it */ 6602 stcb->asoc.numnets--; 6603 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6604 sctp_free_remote_addr(net); 6605 if (net == stcb->asoc.primary_destination) { 6606 stcb->asoc.primary_destination = NULL; 6607 sctp_select_primary_destination(stcb); 6608 } 6609 } 6610 } 6611 if ((stcb->asoc.ecn_supported == 1) && 6612 (peer_supports_ecn == 0)) { 6613 stcb->asoc.ecn_supported = 0; 6614 } 6615 if ((stcb->asoc.prsctp_supported == 1) && 6616 (peer_supports_prsctp == 0)) { 6617 stcb->asoc.prsctp_supported = 0; 6618 } 6619 if ((stcb->asoc.auth_supported == 1) && 6620 ((peer_supports_auth == 0) || 6621 (got_random == 0) || (got_hmacs == 0))) { 6622 stcb->asoc.auth_supported = 0; 6623 } 6624 if ((stcb->asoc.asconf_supported == 1) && 6625 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6626 (stcb->asoc.auth_supported == 0) || 6627 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6628 stcb->asoc.asconf_supported = 0; 6629 } 6630 if ((stcb->asoc.reconfig_supported == 1) && 6631 (peer_supports_reconfig == 0)) { 6632 stcb->asoc.reconfig_supported = 0; 6633 } 6634 if ((stcb->asoc.nrsack_supported == 1) && 6635 (peer_supports_nrsack == 0)) { 6636 stcb->asoc.nrsack_supported = 0; 6637 } 6638 if ((stcb->asoc.pktdrop_supported == 1) && 6639 (peer_supports_pktdrop == 0)) { 6640 stcb->asoc.pktdrop_supported = 0; 6641 } 6642 /* validate authentication required parameters */ 6643 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6644 /* peer does not support auth but sent a chunks list? */ 6645 return (-31); 6646 } 6647 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6648 /* peer supports asconf but not auth? */ 6649 return (-32); 6650 } else if ((peer_supports_asconf == 1) && 6651 (peer_supports_auth == 1) && 6652 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6653 return (-33); 6654 } 6655 /* concatenate the full random key */ 6656 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6657 if (chunks != NULL) { 6658 keylen += sizeof(*chunks) + num_chunks; 6659 } 6660 new_key = sctp_alloc_key(keylen); 6661 if (new_key != NULL) { 6662 /* copy in the RANDOM */ 6663 if (p_random != NULL) { 6664 keylen = sizeof(*p_random) + random_len; 6665 bcopy(p_random, new_key->key, keylen); 6666 } 6667 /* append in the AUTH chunks */ 6668 if (chunks != NULL) { 6669 bcopy(chunks, new_key->key + keylen, 6670 sizeof(*chunks) + num_chunks); 6671 keylen += sizeof(*chunks) + num_chunks; 6672 } 6673 /* append in the HMACs */ 6674 if (hmacs != NULL) { 6675 bcopy(hmacs, new_key->key + keylen, 6676 sizeof(*hmacs) + hmacs_len); 6677 } 6678 } else { 6679 /* failed to get memory for the key */ 6680 return (-34); 6681 } 6682 if (stcb->asoc.authinfo.peer_random != NULL) 6683 sctp_free_key(stcb->asoc.authinfo.peer_random); 6684 stcb->asoc.authinfo.peer_random = new_key; 6685 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6686 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6687 6688 return (0); 6689 } 6690 6691 int 6692 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6693 struct sctp_nets *net) 6694 { 6695 /* make sure the requested primary address exists in the assoc */ 6696 if (net == NULL && sa) 6697 net = sctp_findnet(stcb, sa); 6698 6699 if (net == NULL) { 6700 /* didn't find the requested primary address! */ 6701 return (-1); 6702 } else { 6703 /* set the primary address */ 6704 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6705 /* Must be confirmed, so queue to set */ 6706 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6707 return (0); 6708 } 6709 stcb->asoc.primary_destination = net; 6710 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6711 sctp_free_remote_addr(stcb->asoc.alternate); 6712 stcb->asoc.alternate = NULL; 6713 } 6714 net = TAILQ_FIRST(&stcb->asoc.nets); 6715 if (net != stcb->asoc.primary_destination) { 6716 /* 6717 * first one on the list is NOT the primary 6718 * sctp_cmpaddr() is much more efficient if the 6719 * primary is the first on the list, make it so. 6720 */ 6721 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6722 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6723 } 6724 return (0); 6725 } 6726 } 6727 6728 int 6729 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6730 { 6731 /* 6732 * This function serves two purposes. It will see if a TAG can be 6733 * re-used and return 1 for yes it is ok and 0 for don't use that 6734 * tag. A secondary function it will do is purge out old tags that 6735 * can be removed. 6736 */ 6737 struct sctpvtaghead *chain; 6738 struct sctp_tagblock *twait_block; 6739 struct sctpasochead *head; 6740 struct sctp_tcb *stcb; 6741 int i; 6742 6743 SCTP_INP_INFO_RLOCK(); 6744 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6745 SCTP_BASE_INFO(hashasocmark))]; 6746 LIST_FOREACH(stcb, head, sctp_asocs) { 6747 /* 6748 * We choose not to lock anything here. TCB's can't be 6749 * removed since we have the read lock, so they can't be 6750 * freed on us, same thing for the INP. I may be wrong with 6751 * this assumption, but we will go with it for now :-) 6752 */ 6753 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6754 continue; 6755 } 6756 if (stcb->asoc.my_vtag == tag) { 6757 /* candidate */ 6758 if (stcb->rport != rport) { 6759 continue; 6760 } 6761 if (stcb->sctp_ep->sctp_lport != lport) { 6762 continue; 6763 } 6764 /* Its a used tag set */ 6765 SCTP_INP_INFO_RUNLOCK(); 6766 return (0); 6767 } 6768 } 6769 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6770 /* Now what about timed wait ? */ 6771 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6772 /* 6773 * Block(s) are present, lets see if we have this tag in the 6774 * list 6775 */ 6776 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6777 if (twait_block->vtag_block[i].v_tag == 0) { 6778 /* not used */ 6779 continue; 6780 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6781 now->tv_sec) { 6782 /* Audit expires this guy */ 6783 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6784 twait_block->vtag_block[i].v_tag = 0; 6785 twait_block->vtag_block[i].lport = 0; 6786 twait_block->vtag_block[i].rport = 0; 6787 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6788 (twait_block->vtag_block[i].lport == lport) && 6789 (twait_block->vtag_block[i].rport == rport)) { 6790 /* Bad tag, sorry :< */ 6791 SCTP_INP_INFO_RUNLOCK(); 6792 return (0); 6793 } 6794 } 6795 } 6796 SCTP_INP_INFO_RUNLOCK(); 6797 return (1); 6798 } 6799 6800 static void 6801 sctp_drain_mbufs(struct sctp_tcb *stcb) 6802 { 6803 /* 6804 * We must hunt this association for MBUF's past the cumack (i.e. 6805 * out of order data that we can renege on). 6806 */ 6807 struct sctp_association *asoc; 6808 struct sctp_tmit_chunk *chk, *nchk; 6809 uint32_t cumulative_tsn_p1; 6810 struct sctp_queued_to_read *ctl, *nctl; 6811 int cnt, strmat; 6812 uint32_t gap, i; 6813 int fnd = 0; 6814 6815 /* We look for anything larger than the cum-ack + 1 */ 6816 6817 asoc = &stcb->asoc; 6818 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6819 /* none we can reneg on. */ 6820 return; 6821 } 6822 SCTP_STAT_INCR(sctps_protocol_drains_done); 6823 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6824 cnt = 0; 6825 /* First look in the re-assembly queue */ 6826 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6827 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6828 /* Yep it is above cum-ack */ 6829 cnt++; 6830 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6831 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6832 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6833 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6834 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6835 if (chk->data) { 6836 sctp_m_freem(chk->data); 6837 chk->data = NULL; 6838 } 6839 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6840 } 6841 } 6842 /* Ok that was fun, now we will drain all the inbound streams? */ 6843 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6844 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6845 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6846 /* Yep it is above cum-ack */ 6847 cnt++; 6848 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6849 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6850 sctp_ucount_decr(asoc->cnt_on_all_streams); 6851 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6852 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6853 if (ctl->data) { 6854 sctp_m_freem(ctl->data); 6855 ctl->data = NULL; 6856 } 6857 sctp_free_remote_addr(ctl->whoFrom); 6858 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6859 SCTP_DECR_READQ_COUNT(); 6860 } 6861 } 6862 } 6863 if (cnt) { 6864 /* We must back down to see what the new highest is */ 6865 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6866 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6867 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6868 asoc->highest_tsn_inside_map = i; 6869 fnd = 1; 6870 break; 6871 } 6872 } 6873 if (!fnd) { 6874 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6875 } 6876 /* 6877 * Question, should we go through the delivery queue? The 6878 * only reason things are on here is the app not reading OR 6879 * a p-d-api up. An attacker COULD send enough in to 6880 * initiate the PD-API and then send a bunch of stuff to 6881 * other streams... these would wind up on the delivery 6882 * queue.. and then we would not get to them. But in order 6883 * to do this I then have to back-track and un-deliver 6884 * sequence numbers in streams.. el-yucko. I think for now 6885 * we will NOT look at the delivery queue and leave it to be 6886 * something to consider later. An alternative would be to 6887 * abort the P-D-API with a notification and then deliver 6888 * the data.... Or another method might be to keep track of 6889 * how many times the situation occurs and if we see a 6890 * possible attack underway just abort the association. 6891 */ 6892 #ifdef SCTP_DEBUG 6893 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6894 #endif 6895 /* 6896 * Now do we need to find a new 6897 * asoc->highest_tsn_inside_map? 6898 */ 6899 asoc->last_revoke_count = cnt; 6900 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6901 /* sa_ignore NO_NULL_CHK */ 6902 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6903 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6904 } 6905 /* 6906 * Another issue, in un-setting the TSN's in the mapping array we 6907 * DID NOT adjust the highest_tsn marker. This will cause one of 6908 * two things to occur. It may cause us to do extra work in checking 6909 * for our mapping array movement. More importantly it may cause us 6910 * to SACK every datagram. This may not be a bad thing though since 6911 * we will recover once we get our cum-ack above and all this stuff 6912 * we dumped recovered. 6913 */ 6914 } 6915 6916 void 6917 sctp_drain() 6918 { 6919 /* 6920 * We must walk the PCB lists for ALL associations here. The system 6921 * is LOW on MBUF's and needs help. This is where reneging will 6922 * occur. We really hope this does NOT happen! 6923 */ 6924 VNET_ITERATOR_DECL(vnet_iter); 6925 VNET_LIST_RLOCK_NOSLEEP(); 6926 VNET_FOREACH(vnet_iter) { 6927 CURVNET_SET(vnet_iter); 6928 struct sctp_inpcb *inp; 6929 struct sctp_tcb *stcb; 6930 6931 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6932 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6933 #ifdef VIMAGE 6934 continue; 6935 #else 6936 return; 6937 #endif 6938 } 6939 SCTP_INP_INFO_RLOCK(); 6940 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6941 /* For each endpoint */ 6942 SCTP_INP_RLOCK(inp); 6943 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6944 /* For each association */ 6945 SCTP_TCB_LOCK(stcb); 6946 sctp_drain_mbufs(stcb); 6947 SCTP_TCB_UNLOCK(stcb); 6948 } 6949 SCTP_INP_RUNLOCK(inp); 6950 } 6951 SCTP_INP_INFO_RUNLOCK(); 6952 CURVNET_RESTORE(); 6953 } 6954 VNET_LIST_RUNLOCK_NOSLEEP(); 6955 } 6956 6957 /* 6958 * start a new iterator 6959 * iterates through all endpoints and associations based on the pcb_state 6960 * flags and asoc_state. "af" (mandatory) is executed for all matching 6961 * assocs and "ef" (optional) is executed when the iterator completes. 6962 * "inpf" (optional) is executed for each new endpoint as it is being 6963 * iterated through. inpe (optional) is called when the inp completes 6964 * its way through all the stcbs. 6965 */ 6966 int 6967 sctp_initiate_iterator(inp_func inpf, 6968 asoc_func af, 6969 inp_func inpe, 6970 uint32_t pcb_state, 6971 uint32_t pcb_features, 6972 uint32_t asoc_state, 6973 void *argp, 6974 uint32_t argi, 6975 end_func ef, 6976 struct sctp_inpcb *s_inp, 6977 uint8_t chunk_output_off) 6978 { 6979 struct sctp_iterator *it = NULL; 6980 6981 if (af == NULL) { 6982 return (-1); 6983 } 6984 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6985 SCTP_M_ITER); 6986 if (it == NULL) { 6987 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6988 return (ENOMEM); 6989 } 6990 memset(it, 0, sizeof(*it)); 6991 it->function_assoc = af; 6992 it->function_inp = inpf; 6993 if (inpf) 6994 it->done_current_ep = 0; 6995 else 6996 it->done_current_ep = 1; 6997 it->function_atend = ef; 6998 it->pointer = argp; 6999 it->val = argi; 7000 it->pcb_flags = pcb_state; 7001 it->pcb_features = pcb_features; 7002 it->asoc_state = asoc_state; 7003 it->function_inp_end = inpe; 7004 it->no_chunk_output = chunk_output_off; 7005 it->vn = curvnet; 7006 if (s_inp) { 7007 /* Assume lock is held here */ 7008 it->inp = s_inp; 7009 SCTP_INP_INCR_REF(it->inp); 7010 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7011 } else { 7012 SCTP_INP_INFO_RLOCK(); 7013 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7014 if (it->inp) { 7015 SCTP_INP_INCR_REF(it->inp); 7016 } 7017 SCTP_INP_INFO_RUNLOCK(); 7018 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7019 7020 } 7021 SCTP_IPI_ITERATOR_WQ_LOCK(); 7022 7023 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7024 if (sctp_it_ctl.iterator_running == 0) { 7025 sctp_wakeup_iterator(); 7026 } 7027 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7028 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7029 return (0); 7030 } 7031