1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/sctp_dtrace_define.h> 49 #include <netinet/udp.h> 50 #ifdef INET6 51 #include <netinet6/ip6_var.h> 52 #endif 53 #include <sys/sched.h> 54 #include <sys/smp.h> 55 #include <sys/unistd.h> 56 57 58 VNET_DEFINE(struct sctp_base_info, system_base_info); 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 79 #endif 80 81 void 82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 83 { 84 /* 85 * We really don't need to lock this, but I will just because it 86 * does not hurt. 87 */ 88 SCTP_INP_INFO_RLOCK(); 89 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 90 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 91 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 92 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 93 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 94 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 95 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 96 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 97 98 SCTP_INP_INFO_RUNLOCK(); 99 } 100 101 /* 102 * Addresses are added to VRF's (Virtual Router's). For BSD we 103 * have only the default VRF 0. We maintain a hash list of 104 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 105 * these has a list of addresses. When we add a new address 106 * to a VRF we lookup the ifn/ifn_index, if the ifn does 107 * not exist we create it and add it to the list of IFN's 108 * within the VRF. Once we have the sctp_ifn, we add the 109 * address to the list. So we look something like: 110 * 111 * hash-vrf-table 112 * vrf-> ifn-> ifn -> ifn 113 * vrf | 114 * ... +--ifa-> ifa -> ifa 115 * vrf 116 * 117 * We keep these separate lists since the SCTP subsystem will 118 * point to these from its source address selection nets structure. 119 * When an address is deleted it does not happen right away on 120 * the SCTP side, it gets scheduled. What we do when a 121 * delete happens is immediately remove the address from 122 * the master list and decrement the refcount. As our 123 * addip iterator works through and frees the src address 124 * selection pointing to the sctp_ifa, eventually the refcount 125 * will reach 0 and we will delete it. Note that it is assumed 126 * that any locking on system level ifn/ifa is done at the 127 * caller of these functions and these routines will only 128 * lock the SCTP structures as they add or delete things. 129 * 130 * Other notes on VRF concepts. 131 * - An endpoint can be in multiple VRF's 132 * - An association lives within a VRF and only one VRF. 133 * - Any incoming packet we can deduce the VRF for by 134 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 135 * - Any downward send call or connect call must supply the 136 * VRF via ancillary data or via some sort of set default 137 * VRF socket option call (again for BSD no brainer since 138 * the VRF is always 0). 139 * - An endpoint may add multiple VRF's to it. 140 * - Listening sockets can accept associations in any 141 * of the VRF's they are in but the assoc will end up 142 * in only one VRF (gotten from the packet or connect/send). 143 * 144 */ 145 146 struct sctp_vrf * 147 sctp_allocate_vrf(int vrf_id) 148 { 149 struct sctp_vrf *vrf = NULL; 150 struct sctp_vrflist *bucket; 151 152 /* First allocate the VRF structure */ 153 vrf = sctp_find_vrf(vrf_id); 154 if (vrf) { 155 /* Already allocated */ 156 return (vrf); 157 } 158 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 159 SCTP_M_VRF); 160 if (vrf == NULL) { 161 /* No memory */ 162 #ifdef INVARIANTS 163 panic("No memory for VRF:%d", vrf_id); 164 #endif 165 return (NULL); 166 } 167 /* setup the VRF */ 168 memset(vrf, 0, sizeof(struct sctp_vrf)); 169 vrf->vrf_id = vrf_id; 170 LIST_INIT(&vrf->ifnlist); 171 vrf->total_ifa_count = 0; 172 vrf->refcount = 0; 173 /* now also setup table ids */ 174 SCTP_INIT_VRF_TABLEID(vrf); 175 /* Init the HASH of addresses */ 176 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 177 &vrf->vrf_addr_hashmark); 178 if (vrf->vrf_addr_hash == NULL) { 179 /* No memory */ 180 #ifdef INVARIANTS 181 panic("No memory for VRF:%d", vrf_id); 182 #endif 183 SCTP_FREE(vrf, SCTP_M_VRF); 184 return (NULL); 185 } 186 /* Add it to the hash table */ 187 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 188 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 189 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 190 return (vrf); 191 } 192 193 194 struct sctp_ifn * 195 sctp_find_ifn(void *ifn, uint32_t ifn_index) 196 { 197 struct sctp_ifn *sctp_ifnp; 198 struct sctp_ifnlist *hash_ifn_head; 199 200 /* 201 * We assume the lock is held for the addresses if that's wrong 202 * problems could occur :-) 203 */ 204 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 205 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 206 if (sctp_ifnp->ifn_index == ifn_index) { 207 return (sctp_ifnp); 208 } 209 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 210 return (sctp_ifnp); 211 } 212 } 213 return (NULL); 214 } 215 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 void 234 sctp_free_vrf(struct sctp_vrf *vrf) 235 { 236 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 237 if (vrf->vrf_addr_hash) { 238 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 239 vrf->vrf_addr_hash = NULL; 240 } 241 /* We zero'd the count */ 242 LIST_REMOVE(vrf, next_vrf); 243 SCTP_FREE(vrf, SCTP_M_VRF); 244 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 245 } 246 } 247 248 void 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 250 { 251 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 252 /* We zero'd the count */ 253 if (sctp_ifnp->vrf) { 254 sctp_free_vrf(sctp_ifnp->vrf); 255 } 256 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 257 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 258 } 259 } 260 261 void 262 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 263 { 264 struct sctp_ifn *sctp_ifnp; 265 266 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 267 if (sctp_ifnp != NULL) { 268 sctp_ifnp->ifn_mtu = mtu; 269 } 270 } 271 272 273 void 274 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 275 { 276 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 277 /* We zero'd the count */ 278 if (sctp_ifap->ifn_p) { 279 sctp_free_ifn(sctp_ifap->ifn_p); 280 } 281 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 282 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 283 } 284 } 285 286 static void 287 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 288 { 289 struct sctp_ifn *found; 290 291 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 292 if (found == NULL) { 293 /* Not in the list.. sorry */ 294 return; 295 } 296 if (hold_addr_lock == 0) 297 SCTP_IPI_ADDR_WLOCK(); 298 LIST_REMOVE(sctp_ifnp, next_bucket); 299 LIST_REMOVE(sctp_ifnp, next_ifn); 300 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 301 sctp_ifnp->registered_af); 302 if (hold_addr_lock == 0) 303 SCTP_IPI_ADDR_WUNLOCK(); 304 /* Take away the reference, and possibly free it */ 305 sctp_free_ifn(sctp_ifnp); 306 } 307 308 void 309 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 310 const char *if_name, uint32_t ifn_index) 311 { 312 struct sctp_vrf *vrf; 313 struct sctp_ifa *sctp_ifap = NULL; 314 315 SCTP_IPI_ADDR_RLOCK(); 316 vrf = sctp_find_vrf(vrf_id); 317 if (vrf == NULL) { 318 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 319 goto out; 320 321 } 322 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 323 if (sctp_ifap == NULL) { 324 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 325 goto out; 326 } 327 if (sctp_ifap->ifn_p == NULL) { 328 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 329 goto out; 330 } 331 if (if_name) { 332 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 334 sctp_ifap->ifn_p->ifn_name, if_name); 335 goto out; 336 } 337 } else { 338 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 340 sctp_ifap->ifn_p->ifn_index, ifn_index); 341 goto out; 342 } 343 } 344 345 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 346 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 347 out: 348 SCTP_IPI_ADDR_RUNLOCK(); 349 } 350 351 void 352 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 353 const char *if_name, uint32_t ifn_index) 354 { 355 struct sctp_vrf *vrf; 356 struct sctp_ifa *sctp_ifap = NULL; 357 358 SCTP_IPI_ADDR_RLOCK(); 359 vrf = sctp_find_vrf(vrf_id); 360 if (vrf == NULL) { 361 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 362 goto out; 363 364 } 365 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 366 if (sctp_ifap == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 368 goto out; 369 } 370 if (sctp_ifap->ifn_p == NULL) { 371 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 372 goto out; 373 } 374 if (if_name) { 375 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 376 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 377 sctp_ifap->ifn_p->ifn_name, if_name); 378 goto out; 379 } 380 } else { 381 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 383 sctp_ifap->ifn_p->ifn_index, ifn_index); 384 goto out; 385 } 386 } 387 388 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 389 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 390 out: 391 SCTP_IPI_ADDR_RUNLOCK(); 392 } 393 394 /*- 395 * Add an ifa to an ifn. 396 * Register the interface as necessary. 397 * NOTE: ADDR write lock MUST be held. 398 */ 399 static void 400 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 401 { 402 int ifa_af; 403 404 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 405 sctp_ifap->ifn_p = sctp_ifnp; 406 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 407 /* update address counts */ 408 sctp_ifnp->ifa_count++; 409 ifa_af = sctp_ifap->address.sa.sa_family; 410 switch (ifa_af) { 411 #ifdef INET 412 case AF_INET: 413 sctp_ifnp->num_v4++; 414 break; 415 #endif 416 #ifdef INET6 417 case AF_INET6: 418 sctp_ifnp->num_v6++; 419 break; 420 #endif 421 default: 422 break; 423 } 424 if (sctp_ifnp->ifa_count == 1) { 425 /* register the new interface */ 426 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 427 sctp_ifnp->registered_af = ifa_af; 428 } 429 } 430 431 /*- 432 * Remove an ifa from its ifn. 433 * If no more addresses exist, remove the ifn too. Otherwise, re-register 434 * the interface based on the remaining address families left. 435 * NOTE: ADDR write lock MUST be held. 436 */ 437 static void 438 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 439 { 440 LIST_REMOVE(sctp_ifap, next_ifa); 441 if (sctp_ifap->ifn_p) { 442 /* update address counts */ 443 sctp_ifap->ifn_p->ifa_count--; 444 switch (sctp_ifap->address.sa.sa_family) { 445 #ifdef INET 446 case AF_INET: 447 sctp_ifap->ifn_p->num_v4--; 448 break; 449 #endif 450 #ifdef INET6 451 case AF_INET6: 452 sctp_ifap->ifn_p->num_v6--; 453 break; 454 #endif 455 default: 456 break; 457 } 458 459 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 460 /* remove the ifn, possibly freeing it */ 461 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 462 } else { 463 /* re-register address family type, if needed */ 464 if ((sctp_ifap->ifn_p->num_v6 == 0) && 465 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 466 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 467 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 468 sctp_ifap->ifn_p->registered_af = AF_INET; 469 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 470 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 471 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 472 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 473 sctp_ifap->ifn_p->registered_af = AF_INET6; 474 } 475 /* free the ifn refcount */ 476 sctp_free_ifn(sctp_ifap->ifn_p); 477 } 478 sctp_ifap->ifn_p = NULL; 479 } 480 } 481 482 struct sctp_ifa * 483 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 484 uint32_t ifn_type, const char *if_name, void *ifa, 485 struct sockaddr *addr, uint32_t ifa_flags, 486 int dynamic_add) 487 { 488 struct sctp_vrf *vrf; 489 struct sctp_ifn *sctp_ifnp = NULL; 490 struct sctp_ifa *sctp_ifap = NULL; 491 struct sctp_ifalist *hash_addr_head; 492 struct sctp_ifnlist *hash_ifn_head; 493 uint32_t hash_of_addr; 494 int new_ifn_af = 0; 495 496 #ifdef SCTP_DEBUG 497 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 498 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 499 #endif 500 SCTP_IPI_ADDR_WLOCK(); 501 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 502 if (sctp_ifnp) { 503 vrf = sctp_ifnp->vrf; 504 } else { 505 vrf = sctp_find_vrf(vrf_id); 506 if (vrf == NULL) { 507 vrf = sctp_allocate_vrf(vrf_id); 508 if (vrf == NULL) { 509 SCTP_IPI_ADDR_WUNLOCK(); 510 return (NULL); 511 } 512 } 513 } 514 if (sctp_ifnp == NULL) { 515 /* 516 * build one and add it, can't hold lock until after malloc 517 * done though. 518 */ 519 SCTP_IPI_ADDR_WUNLOCK(); 520 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 521 sizeof(struct sctp_ifn), SCTP_M_IFN); 522 if (sctp_ifnp == NULL) { 523 #ifdef INVARIANTS 524 panic("No memory for IFN"); 525 #endif 526 return (NULL); 527 } 528 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 529 sctp_ifnp->ifn_index = ifn_index; 530 sctp_ifnp->ifn_p = ifn; 531 sctp_ifnp->ifn_type = ifn_type; 532 sctp_ifnp->refcount = 0; 533 sctp_ifnp->vrf = vrf; 534 atomic_add_int(&vrf->refcount, 1); 535 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 536 if (if_name != NULL) { 537 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 538 } else { 539 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 540 } 541 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 542 LIST_INIT(&sctp_ifnp->ifalist); 543 SCTP_IPI_ADDR_WLOCK(); 544 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 545 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 546 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 547 new_ifn_af = 1; 548 } 549 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 550 if (sctp_ifap) { 551 /* Hmm, it already exists? */ 552 if ((sctp_ifap->ifn_p) && 553 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 554 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 555 sctp_ifap->ifn_p->ifn_name, ifn_index, 556 sctp_ifap); 557 if (new_ifn_af) { 558 /* Remove the created one that we don't want */ 559 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 560 } 561 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 562 /* easy to solve, just switch back to active */ 563 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 564 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 565 sctp_ifap->ifn_p = sctp_ifnp; 566 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 567 } 568 exit_stage_left: 569 SCTP_IPI_ADDR_WUNLOCK(); 570 return (sctp_ifap); 571 } else { 572 if (sctp_ifap->ifn_p) { 573 /* 574 * The last IFN gets the address, remove the 575 * old one 576 */ 577 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 578 sctp_ifap, sctp_ifap->ifn_p->ifn_name, 579 sctp_ifap->ifn_p->ifn_index, if_name, 580 ifn_index); 581 /* remove the address from the old ifn */ 582 sctp_remove_ifa_from_ifn(sctp_ifap); 583 /* move the address over to the new ifn */ 584 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 585 goto exit_stage_left; 586 } else { 587 /* repair ifnp which was NULL ? */ 588 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 589 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 590 sctp_ifnp, sctp_ifap); 591 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 592 } 593 goto exit_stage_left; 594 } 595 } 596 SCTP_IPI_ADDR_WUNLOCK(); 597 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 598 if (sctp_ifap == NULL) { 599 #ifdef INVARIANTS 600 panic("No memory for IFA"); 601 #endif 602 return (NULL); 603 } 604 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 605 sctp_ifap->ifn_p = sctp_ifnp; 606 atomic_add_int(&sctp_ifnp->refcount, 1); 607 sctp_ifap->vrf_id = vrf_id; 608 sctp_ifap->ifa = ifa; 609 memcpy(&sctp_ifap->address, addr, addr->sa_len); 610 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 611 sctp_ifap->flags = ifa_flags; 612 /* Set scope */ 613 switch (sctp_ifap->address.sa.sa_family) { 614 #ifdef INET 615 case AF_INET: 616 { 617 struct sockaddr_in *sin; 618 619 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 620 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 621 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 622 sctp_ifap->src_is_loop = 1; 623 } 624 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 625 sctp_ifap->src_is_priv = 1; 626 } 627 sctp_ifnp->num_v4++; 628 if (new_ifn_af) 629 new_ifn_af = AF_INET; 630 break; 631 } 632 #endif 633 #ifdef INET6 634 case AF_INET6: 635 { 636 /* ok to use deprecated addresses? */ 637 struct sockaddr_in6 *sin6; 638 639 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 640 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 641 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 642 sctp_ifap->src_is_loop = 1; 643 } 644 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 645 sctp_ifap->src_is_priv = 1; 646 } 647 sctp_ifnp->num_v6++; 648 if (new_ifn_af) 649 new_ifn_af = AF_INET6; 650 break; 651 } 652 #endif 653 default: 654 new_ifn_af = 0; 655 break; 656 } 657 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 658 659 if ((sctp_ifap->src_is_priv == 0) && 660 (sctp_ifap->src_is_loop == 0)) { 661 sctp_ifap->src_is_glob = 1; 662 } 663 SCTP_IPI_ADDR_WLOCK(); 664 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 665 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 666 sctp_ifap->refcount = 1; 667 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 668 sctp_ifnp->ifa_count++; 669 vrf->total_ifa_count++; 670 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 671 if (new_ifn_af) { 672 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 673 sctp_ifnp->registered_af = new_ifn_af; 674 } 675 SCTP_IPI_ADDR_WUNLOCK(); 676 if (dynamic_add) { 677 /* 678 * Bump up the refcount so that when the timer completes it 679 * will drop back down. 680 */ 681 struct sctp_laddr *wi; 682 683 atomic_add_int(&sctp_ifap->refcount, 1); 684 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 685 if (wi == NULL) { 686 /* 687 * Gak, what can we do? We have lost an address 688 * change can you say HOSED? 689 */ 690 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 691 /* Opps, must decrement the count */ 692 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 693 if_name); 694 return (NULL); 695 } 696 SCTP_INCR_LADDR_COUNT(); 697 bzero(wi, sizeof(*wi)); 698 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 699 wi->ifa = sctp_ifap; 700 wi->action = SCTP_ADD_IP_ADDRESS; 701 702 SCTP_WQ_ADDR_LOCK(); 703 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 704 SCTP_WQ_ADDR_UNLOCK(); 705 706 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 707 (struct sctp_inpcb *)NULL, 708 (struct sctp_tcb *)NULL, 709 (struct sctp_nets *)NULL); 710 } else { 711 /* it's ready for use */ 712 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 713 } 714 return (sctp_ifap); 715 } 716 717 void 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 719 uint32_t ifn_index, const char *if_name) 720 { 721 struct sctp_vrf *vrf; 722 struct sctp_ifa *sctp_ifap = NULL; 723 724 SCTP_IPI_ADDR_WLOCK(); 725 vrf = sctp_find_vrf(vrf_id); 726 if (vrf == NULL) { 727 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 728 goto out_now; 729 } 730 #ifdef SCTP_DEBUG 731 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 732 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 733 #endif 734 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 735 if (sctp_ifap) { 736 /* Validate the delete */ 737 if (sctp_ifap->ifn_p) { 738 int valid = 0; 739 740 /*- 741 * The name has priority over the ifn_index 742 * if its given. We do this especially for 743 * panda who might recycle indexes fast. 744 */ 745 if (if_name) { 746 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 747 /* They match its a correct delete */ 748 valid = 1; 749 } 750 } 751 if (!valid) { 752 /* last ditch check ifn_index */ 753 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 754 valid = 1; 755 } 756 } 757 if (!valid) { 758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 759 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 760 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 761 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 762 SCTP_IPI_ADDR_WUNLOCK(); 763 return; 764 } 765 } 766 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap); 767 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 768 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 769 vrf->total_ifa_count--; 770 LIST_REMOVE(sctp_ifap, next_bucket); 771 sctp_remove_ifa_from_ifn(sctp_ifap); 772 } 773 #ifdef SCTP_DEBUG 774 else { 775 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 776 ifn_index); 777 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 778 } 779 #endif 780 781 out_now: 782 SCTP_IPI_ADDR_WUNLOCK(); 783 if (sctp_ifap) { 784 struct sctp_laddr *wi; 785 786 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 787 if (wi == NULL) { 788 /* 789 * Gak, what can we do? We have lost an address 790 * change can you say HOSED? 791 */ 792 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 793 794 /* Oops, must decrement the count */ 795 sctp_free_ifa(sctp_ifap); 796 return; 797 } 798 SCTP_INCR_LADDR_COUNT(); 799 bzero(wi, sizeof(*wi)); 800 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 801 wi->ifa = sctp_ifap; 802 wi->action = SCTP_DEL_IP_ADDRESS; 803 SCTP_WQ_ADDR_LOCK(); 804 /* 805 * Should this really be a tailq? As it is we will process 806 * the newest first :-0 807 */ 808 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 809 SCTP_WQ_ADDR_UNLOCK(); 810 811 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 812 (struct sctp_inpcb *)NULL, 813 (struct sctp_tcb *)NULL, 814 (struct sctp_nets *)NULL); 815 } 816 return; 817 } 818 819 820 static struct sctp_tcb * 821 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 822 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 823 { 824 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 825 /* 826 * If we support the TCP model, then we must now dig through to see 827 * if we can find our endpoint in the list of tcp ep's. 828 */ 829 uint16_t lport, rport; 830 struct sctppcbhead *ephead; 831 struct sctp_inpcb *inp; 832 struct sctp_laddr *laddr; 833 struct sctp_tcb *stcb; 834 struct sctp_nets *net; 835 836 if ((to == NULL) || (from == NULL)) { 837 return (NULL); 838 } 839 switch (to->sa_family) { 840 #ifdef INET 841 case AF_INET: 842 if (from->sa_family == AF_INET) { 843 lport = ((struct sockaddr_in *)to)->sin_port; 844 rport = ((struct sockaddr_in *)from)->sin_port; 845 } else { 846 return (NULL); 847 } 848 break; 849 #endif 850 #ifdef INET6 851 case AF_INET6: 852 if (from->sa_family == AF_INET6) { 853 lport = ((struct sockaddr_in6 *)to)->sin6_port; 854 rport = ((struct sockaddr_in6 *)from)->sin6_port; 855 } else { 856 return (NULL); 857 } 858 break; 859 #endif 860 default: 861 return (NULL); 862 } 863 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 864 /* 865 * Ok now for each of the guys in this bucket we must look and see: 866 * - Does the remote port match. - Does there single association's 867 * addresses match this address (to). If so we update p_ep to point 868 * to this ep and return the tcb from it. 869 */ 870 LIST_FOREACH(inp, ephead, sctp_hash) { 871 SCTP_INP_RLOCK(inp); 872 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 873 SCTP_INP_RUNLOCK(inp); 874 continue; 875 } 876 if (lport != inp->sctp_lport) { 877 SCTP_INP_RUNLOCK(inp); 878 continue; 879 } 880 if (inp->def_vrf_id != vrf_id) { 881 SCTP_INP_RUNLOCK(inp); 882 continue; 883 } 884 /* check to see if the ep has one of the addresses */ 885 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 886 /* We are NOT bound all, so look further */ 887 int match = 0; 888 889 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 890 891 if (laddr->ifa == NULL) { 892 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 893 continue; 894 } 895 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 896 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 897 continue; 898 } 899 if (laddr->ifa->address.sa.sa_family == 900 to->sa_family) { 901 /* see if it matches */ 902 903 #ifdef INET 904 if (from->sa_family == AF_INET) { 905 struct sockaddr_in *intf_addr, 906 *sin; 907 908 intf_addr = &laddr->ifa->address.sin; 909 sin = (struct sockaddr_in *)to; 910 if (sin->sin_addr.s_addr == 911 intf_addr->sin_addr.s_addr) { 912 match = 1; 913 break; 914 } 915 } 916 #endif 917 #ifdef INET6 918 if (from->sa_family == AF_INET6) { 919 struct sockaddr_in6 *intf_addr6; 920 struct sockaddr_in6 *sin6; 921 922 sin6 = (struct sockaddr_in6 *) 923 to; 924 intf_addr6 = &laddr->ifa->address.sin6; 925 926 if (SCTP6_ARE_ADDR_EQUAL(sin6, 927 intf_addr6)) { 928 match = 1; 929 break; 930 } 931 } 932 #endif 933 } 934 } 935 if (match == 0) { 936 /* This endpoint does not have this address */ 937 SCTP_INP_RUNLOCK(inp); 938 continue; 939 } 940 } 941 /* 942 * Ok if we hit here the ep has the address, does it hold 943 * the tcb? 944 */ 945 946 stcb = LIST_FIRST(&inp->sctp_asoc_list); 947 if (stcb == NULL) { 948 SCTP_INP_RUNLOCK(inp); 949 continue; 950 } 951 SCTP_TCB_LOCK(stcb); 952 if (stcb->rport != rport) { 953 /* remote port does not match. */ 954 SCTP_TCB_UNLOCK(stcb); 955 SCTP_INP_RUNLOCK(inp); 956 continue; 957 } 958 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 959 SCTP_TCB_UNLOCK(stcb); 960 SCTP_INP_RUNLOCK(inp); 961 continue; 962 } 963 /* Does this TCB have a matching address? */ 964 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 965 966 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 967 /* not the same family, can't be a match */ 968 continue; 969 } 970 switch (from->sa_family) { 971 #ifdef INET 972 case AF_INET: 973 { 974 struct sockaddr_in *sin, *rsin; 975 976 sin = (struct sockaddr_in *)&net->ro._l_addr; 977 rsin = (struct sockaddr_in *)from; 978 if (sin->sin_addr.s_addr == 979 rsin->sin_addr.s_addr) { 980 /* found it */ 981 if (netp != NULL) { 982 *netp = net; 983 } 984 /* 985 * Update the endpoint 986 * pointer 987 */ 988 *inp_p = inp; 989 SCTP_INP_RUNLOCK(inp); 990 return (stcb); 991 } 992 break; 993 } 994 #endif 995 #ifdef INET6 996 case AF_INET6: 997 { 998 struct sockaddr_in6 *sin6, *rsin6; 999 1000 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1001 rsin6 = (struct sockaddr_in6 *)from; 1002 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1003 rsin6)) { 1004 /* found it */ 1005 if (netp != NULL) { 1006 *netp = net; 1007 } 1008 /* 1009 * Update the endpoint 1010 * pointer 1011 */ 1012 *inp_p = inp; 1013 SCTP_INP_RUNLOCK(inp); 1014 return (stcb); 1015 } 1016 break; 1017 } 1018 #endif 1019 default: 1020 /* TSNH */ 1021 break; 1022 } 1023 } 1024 SCTP_TCB_UNLOCK(stcb); 1025 SCTP_INP_RUNLOCK(inp); 1026 } 1027 return (NULL); 1028 } 1029 1030 static int 1031 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1032 { 1033 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1034 int ipv4_addr_legal, ipv6_addr_legal; 1035 struct sctp_vrf *vrf; 1036 struct sctp_ifn *sctp_ifn; 1037 struct sctp_ifa *sctp_ifa; 1038 1039 loopback_scope = stcb->asoc.loopback_scope; 1040 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1041 local_scope = stcb->asoc.local_scope; 1042 site_scope = stcb->asoc.site_scope; 1043 ipv4_addr_legal = ipv6_addr_legal = 0; 1044 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1045 ipv6_addr_legal = 1; 1046 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1047 ipv4_addr_legal = 1; 1048 } 1049 } else { 1050 ipv4_addr_legal = 1; 1051 } 1052 1053 SCTP_IPI_ADDR_RLOCK(); 1054 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1055 if (vrf == NULL) { 1056 /* no vrf, no addresses */ 1057 SCTP_IPI_ADDR_RUNLOCK(); 1058 return (0); 1059 } 1060 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1061 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1062 if ((loopback_scope == 0) && 1063 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1064 continue; 1065 } 1066 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1067 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 1068 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 1069 /* 1070 * We allow pending addresses, where 1071 * we have sent an asconf-add to be 1072 * considered valid. 1073 */ 1074 continue; 1075 } 1076 switch (sctp_ifa->address.sa.sa_family) { 1077 #ifdef INET 1078 case AF_INET: 1079 if (ipv4_addr_legal) { 1080 struct sockaddr_in *sin, 1081 *rsin; 1082 1083 sin = &sctp_ifa->address.sin; 1084 rsin = (struct sockaddr_in *)to; 1085 if ((ipv4_local_scope == 0) && 1086 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1087 continue; 1088 } 1089 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1090 SCTP_IPI_ADDR_RUNLOCK(); 1091 return (1); 1092 } 1093 } 1094 break; 1095 #endif 1096 #ifdef INET6 1097 case AF_INET6: 1098 if (ipv6_addr_legal) { 1099 struct sockaddr_in6 *sin6, 1100 *rsin6; 1101 1102 sin6 = &sctp_ifa->address.sin6; 1103 rsin6 = (struct sockaddr_in6 *)to; 1104 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1105 if (local_scope == 0) 1106 continue; 1107 if (sin6->sin6_scope_id == 0) { 1108 if (sa6_recoverscope(sin6) != 0) 1109 continue; 1110 } 1111 } 1112 if ((site_scope == 0) && 1113 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1114 continue; 1115 } 1116 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1117 SCTP_IPI_ADDR_RUNLOCK(); 1118 return (1); 1119 } 1120 } 1121 break; 1122 #endif 1123 default: 1124 /* TSNH */ 1125 break; 1126 } 1127 } 1128 } 1129 } else { 1130 struct sctp_laddr *laddr; 1131 1132 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1133 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 1134 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 1135 /* 1136 * We allow pending addresses, where we have 1137 * sent an asconf-add to be considered 1138 * valid. 1139 */ 1140 continue; 1141 } 1142 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1143 continue; 1144 } 1145 switch (to->sa_family) { 1146 #ifdef INET 1147 case AF_INET: 1148 { 1149 struct sockaddr_in *sin, *rsin; 1150 1151 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1152 rsin = (struct sockaddr_in *)to; 1153 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1154 SCTP_IPI_ADDR_RUNLOCK(); 1155 return (1); 1156 } 1157 break; 1158 } 1159 #endif 1160 #ifdef INET6 1161 case AF_INET6: 1162 { 1163 struct sockaddr_in6 *sin6, *rsin6; 1164 1165 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1166 rsin6 = (struct sockaddr_in6 *)to; 1167 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1168 SCTP_IPI_ADDR_RUNLOCK(); 1169 return (1); 1170 } 1171 break; 1172 } 1173 1174 #endif 1175 default: 1176 /* TSNH */ 1177 break; 1178 } 1179 1180 } 1181 } 1182 SCTP_IPI_ADDR_RUNLOCK(); 1183 return (0); 1184 } 1185 1186 /* 1187 * rules for use 1188 * 1189 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1190 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1191 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1192 * NULL. 1193 */ 1194 1195 struct sctp_tcb * 1196 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1197 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1198 { 1199 struct sctpasochead *head; 1200 struct sctp_inpcb *inp; 1201 struct sctp_tcb *stcb = NULL; 1202 struct sctp_nets *net; 1203 uint16_t rport; 1204 1205 inp = *inp_p; 1206 switch (remote->sa_family) { 1207 #ifdef INET 1208 case AF_INET: 1209 rport = (((struct sockaddr_in *)remote)->sin_port); 1210 break; 1211 #endif 1212 #ifdef INET6 1213 case AF_INET6: 1214 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1215 break; 1216 #endif 1217 default: 1218 return (NULL); 1219 } 1220 if (locked_tcb) { 1221 /* 1222 * UN-lock so we can do proper locking here this occurs when 1223 * called from load_addresses_from_init. 1224 */ 1225 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1226 SCTP_TCB_UNLOCK(locked_tcb); 1227 } 1228 SCTP_INP_INFO_RLOCK(); 1229 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1230 /*- 1231 * Now either this guy is our listener or it's the 1232 * connector. If it is the one that issued the connect, then 1233 * it's only chance is to be the first TCB in the list. If 1234 * it is the acceptor, then do the special_lookup to hash 1235 * and find the real inp. 1236 */ 1237 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1238 /* to is peer addr, from is my addr */ 1239 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1240 netp, inp->def_vrf_id); 1241 if ((stcb != NULL) && (locked_tcb == NULL)) { 1242 /* we have a locked tcb, lower refcount */ 1243 SCTP_INP_DECR_REF(inp); 1244 } 1245 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1246 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1247 SCTP_TCB_LOCK(locked_tcb); 1248 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1249 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1250 } 1251 SCTP_INP_INFO_RUNLOCK(); 1252 return (stcb); 1253 } else { 1254 SCTP_INP_WLOCK(inp); 1255 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1256 goto null_return; 1257 } 1258 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1259 if (stcb == NULL) { 1260 goto null_return; 1261 } 1262 SCTP_TCB_LOCK(stcb); 1263 1264 if (stcb->rport != rport) { 1265 /* remote port does not match. */ 1266 SCTP_TCB_UNLOCK(stcb); 1267 goto null_return; 1268 } 1269 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1270 SCTP_TCB_UNLOCK(stcb); 1271 goto null_return; 1272 } 1273 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1274 SCTP_TCB_UNLOCK(stcb); 1275 goto null_return; 1276 } 1277 /* now look at the list of remote addresses */ 1278 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1279 #ifdef INVARIANTS 1280 if (net == (TAILQ_NEXT(net, sctp_next))) { 1281 panic("Corrupt net list"); 1282 } 1283 #endif 1284 if (net->ro._l_addr.sa.sa_family != 1285 remote->sa_family) { 1286 /* not the same family */ 1287 continue; 1288 } 1289 switch (remote->sa_family) { 1290 #ifdef INET 1291 case AF_INET: 1292 { 1293 struct sockaddr_in *sin, 1294 *rsin; 1295 1296 sin = (struct sockaddr_in *) 1297 &net->ro._l_addr; 1298 rsin = (struct sockaddr_in *)remote; 1299 if (sin->sin_addr.s_addr == 1300 rsin->sin_addr.s_addr) { 1301 /* found it */ 1302 if (netp != NULL) { 1303 *netp = net; 1304 } 1305 if (locked_tcb == NULL) { 1306 SCTP_INP_DECR_REF(inp); 1307 } else if (locked_tcb != stcb) { 1308 SCTP_TCB_LOCK(locked_tcb); 1309 } 1310 if (locked_tcb) { 1311 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1312 } 1313 SCTP_INP_WUNLOCK(inp); 1314 SCTP_INP_INFO_RUNLOCK(); 1315 return (stcb); 1316 } 1317 break; 1318 } 1319 #endif 1320 #ifdef INET6 1321 case AF_INET6: 1322 { 1323 struct sockaddr_in6 *sin6, 1324 *rsin6; 1325 1326 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1327 rsin6 = (struct sockaddr_in6 *)remote; 1328 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1329 rsin6)) { 1330 /* found it */ 1331 if (netp != NULL) { 1332 *netp = net; 1333 } 1334 if (locked_tcb == NULL) { 1335 SCTP_INP_DECR_REF(inp); 1336 } else if (locked_tcb != stcb) { 1337 SCTP_TCB_LOCK(locked_tcb); 1338 } 1339 if (locked_tcb) { 1340 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1341 } 1342 SCTP_INP_WUNLOCK(inp); 1343 SCTP_INP_INFO_RUNLOCK(); 1344 return (stcb); 1345 } 1346 break; 1347 } 1348 #endif 1349 default: 1350 /* TSNH */ 1351 break; 1352 } 1353 } 1354 SCTP_TCB_UNLOCK(stcb); 1355 } 1356 } else { 1357 SCTP_INP_WLOCK(inp); 1358 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1359 goto null_return; 1360 } 1361 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1362 inp->sctp_hashmark)]; 1363 if (head == NULL) { 1364 goto null_return; 1365 } 1366 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1367 if (stcb->rport != rport) { 1368 /* remote port does not match */ 1369 continue; 1370 } 1371 SCTP_TCB_LOCK(stcb); 1372 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1373 SCTP_TCB_UNLOCK(stcb); 1374 continue; 1375 } 1376 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1377 SCTP_TCB_UNLOCK(stcb); 1378 continue; 1379 } 1380 /* now look at the list of remote addresses */ 1381 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1382 #ifdef INVARIANTS 1383 if (net == (TAILQ_NEXT(net, sctp_next))) { 1384 panic("Corrupt net list"); 1385 } 1386 #endif 1387 if (net->ro._l_addr.sa.sa_family != 1388 remote->sa_family) { 1389 /* not the same family */ 1390 continue; 1391 } 1392 switch (remote->sa_family) { 1393 #ifdef INET 1394 case AF_INET: 1395 { 1396 struct sockaddr_in *sin, 1397 *rsin; 1398 1399 sin = (struct sockaddr_in *) 1400 &net->ro._l_addr; 1401 rsin = (struct sockaddr_in *)remote; 1402 if (sin->sin_addr.s_addr == 1403 rsin->sin_addr.s_addr) { 1404 /* found it */ 1405 if (netp != NULL) { 1406 *netp = net; 1407 } 1408 if (locked_tcb == NULL) { 1409 SCTP_INP_DECR_REF(inp); 1410 } else if (locked_tcb != stcb) { 1411 SCTP_TCB_LOCK(locked_tcb); 1412 } 1413 if (locked_tcb) { 1414 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1415 } 1416 SCTP_INP_WUNLOCK(inp); 1417 SCTP_INP_INFO_RUNLOCK(); 1418 return (stcb); 1419 } 1420 break; 1421 } 1422 #endif 1423 #ifdef INET6 1424 case AF_INET6: 1425 { 1426 struct sockaddr_in6 *sin6, 1427 *rsin6; 1428 1429 sin6 = (struct sockaddr_in6 *) 1430 &net->ro._l_addr; 1431 rsin6 = (struct sockaddr_in6 *)remote; 1432 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1433 rsin6)) { 1434 /* found it */ 1435 if (netp != NULL) { 1436 *netp = net; 1437 } 1438 if (locked_tcb == NULL) { 1439 SCTP_INP_DECR_REF(inp); 1440 } else if (locked_tcb != stcb) { 1441 SCTP_TCB_LOCK(locked_tcb); 1442 } 1443 if (locked_tcb) { 1444 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1445 } 1446 SCTP_INP_WUNLOCK(inp); 1447 SCTP_INP_INFO_RUNLOCK(); 1448 return (stcb); 1449 } 1450 break; 1451 } 1452 #endif 1453 default: 1454 /* TSNH */ 1455 break; 1456 } 1457 } 1458 SCTP_TCB_UNLOCK(stcb); 1459 } 1460 } 1461 null_return: 1462 /* clean up for returning null */ 1463 if (locked_tcb) { 1464 SCTP_TCB_LOCK(locked_tcb); 1465 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1466 } 1467 SCTP_INP_WUNLOCK(inp); 1468 SCTP_INP_INFO_RUNLOCK(); 1469 /* not found */ 1470 return (NULL); 1471 } 1472 1473 /* 1474 * Find an association for a specific endpoint using the association id given 1475 * out in the COMM_UP notification 1476 */ 1477 1478 struct sctp_tcb * 1479 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1480 { 1481 /* 1482 * Use my the assoc_id to find a endpoint 1483 */ 1484 struct sctpasochead *head; 1485 struct sctp_tcb *stcb; 1486 uint32_t id; 1487 1488 if (inp == NULL) { 1489 SCTP_PRINTF("TSNH ep_associd\n"); 1490 return (NULL); 1491 } 1492 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1493 SCTP_PRINTF("TSNH ep_associd0\n"); 1494 return (NULL); 1495 } 1496 id = (uint32_t) asoc_id; 1497 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1498 if (head == NULL) { 1499 /* invalid id TSNH */ 1500 SCTP_PRINTF("TSNH ep_associd1\n"); 1501 return (NULL); 1502 } 1503 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1504 if (stcb->asoc.assoc_id == id) { 1505 if (inp != stcb->sctp_ep) { 1506 /* 1507 * some other guy has the same id active (id 1508 * collision ??). 1509 */ 1510 SCTP_PRINTF("TSNH ep_associd2\n"); 1511 continue; 1512 } 1513 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1514 continue; 1515 } 1516 if (want_lock) { 1517 SCTP_TCB_LOCK(stcb); 1518 } 1519 return (stcb); 1520 } 1521 } 1522 return (NULL); 1523 } 1524 1525 1526 struct sctp_tcb * 1527 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1528 { 1529 struct sctp_tcb *stcb; 1530 1531 SCTP_INP_RLOCK(inp); 1532 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1533 SCTP_INP_RUNLOCK(inp); 1534 return (stcb); 1535 } 1536 1537 1538 static struct sctp_inpcb * 1539 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1540 uint16_t lport, uint32_t vrf_id) 1541 { 1542 struct sctp_inpcb *inp; 1543 struct sctp_laddr *laddr; 1544 1545 #ifdef INET 1546 struct sockaddr_in *sin; 1547 1548 #endif 1549 #ifdef INET6 1550 struct sockaddr_in6 *sin6; 1551 struct sockaddr_in6 *intf_addr6; 1552 1553 #endif 1554 1555 int fnd; 1556 1557 /* 1558 * Endpoint probe expects that the INP_INFO is locked. 1559 */ 1560 #ifdef INET 1561 sin = NULL; 1562 #endif 1563 #ifdef INET6 1564 sin6 = NULL; 1565 #endif 1566 switch (nam->sa_family) { 1567 #ifdef INET 1568 case AF_INET: 1569 sin = (struct sockaddr_in *)nam; 1570 break; 1571 #endif 1572 #ifdef INET6 1573 case AF_INET6: 1574 sin6 = (struct sockaddr_in6 *)nam; 1575 break; 1576 #endif 1577 default: 1578 /* unsupported family */ 1579 return (NULL); 1580 } 1581 1582 if (head == NULL) 1583 return (NULL); 1584 1585 LIST_FOREACH(inp, head, sctp_hash) { 1586 SCTP_INP_RLOCK(inp); 1587 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1588 SCTP_INP_RUNLOCK(inp); 1589 continue; 1590 } 1591 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1592 (inp->sctp_lport == lport)) { 1593 /* got it */ 1594 #ifdef INET 1595 if ((nam->sa_family == AF_INET) && 1596 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1597 SCTP_IPV6_V6ONLY(inp)) { 1598 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1599 SCTP_INP_RUNLOCK(inp); 1600 continue; 1601 } 1602 #endif 1603 #ifdef INET6 1604 /* A V6 address and the endpoint is NOT bound V6 */ 1605 if (nam->sa_family == AF_INET6 && 1606 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1607 SCTP_INP_RUNLOCK(inp); 1608 continue; 1609 } 1610 #endif 1611 /* does a VRF id match? */ 1612 fnd = 0; 1613 if (inp->def_vrf_id == vrf_id) 1614 fnd = 1; 1615 1616 SCTP_INP_RUNLOCK(inp); 1617 if (!fnd) 1618 continue; 1619 return (inp); 1620 } 1621 SCTP_INP_RUNLOCK(inp); 1622 } 1623 switch (nam->sa_family) { 1624 #ifdef INET 1625 case AF_INET: 1626 if (sin->sin_addr.s_addr == INADDR_ANY) { 1627 /* Can't hunt for one that has no address specified */ 1628 return (NULL); 1629 } 1630 break; 1631 #endif 1632 #ifdef INET6 1633 case AF_INET6: 1634 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1635 /* Can't hunt for one that has no address specified */ 1636 return (NULL); 1637 } 1638 break; 1639 #endif 1640 default: 1641 break; 1642 } 1643 /* 1644 * ok, not bound to all so see if we can find a EP bound to this 1645 * address. 1646 */ 1647 LIST_FOREACH(inp, head, sctp_hash) { 1648 SCTP_INP_RLOCK(inp); 1649 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1650 SCTP_INP_RUNLOCK(inp); 1651 continue; 1652 } 1653 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1654 SCTP_INP_RUNLOCK(inp); 1655 continue; 1656 } 1657 /* 1658 * Ok this could be a likely candidate, look at all of its 1659 * addresses 1660 */ 1661 if (inp->sctp_lport != lport) { 1662 SCTP_INP_RUNLOCK(inp); 1663 continue; 1664 } 1665 /* does a VRF id match? */ 1666 fnd = 0; 1667 if (inp->def_vrf_id == vrf_id) 1668 fnd = 1; 1669 1670 if (!fnd) { 1671 SCTP_INP_RUNLOCK(inp); 1672 continue; 1673 } 1674 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1675 if (laddr->ifa == NULL) { 1676 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1677 __FUNCTION__); 1678 continue; 1679 } 1680 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1681 laddr->ifa); 1682 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1683 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1684 continue; 1685 } 1686 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1687 /* possible, see if it matches */ 1688 switch (nam->sa_family) { 1689 #ifdef INET 1690 case AF_INET: 1691 if (sin->sin_addr.s_addr == 1692 laddr->ifa->address.sin.sin_addr.s_addr) { 1693 SCTP_INP_RUNLOCK(inp); 1694 return (inp); 1695 } 1696 break; 1697 #endif 1698 #ifdef INET6 1699 case AF_INET6: 1700 intf_addr6 = &laddr->ifa->address.sin6; 1701 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1702 intf_addr6)) { 1703 SCTP_INP_RUNLOCK(inp); 1704 return (inp); 1705 } 1706 break; 1707 #endif 1708 } 1709 } 1710 } 1711 SCTP_INP_RUNLOCK(inp); 1712 } 1713 return (NULL); 1714 } 1715 1716 1717 static struct sctp_inpcb * 1718 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1719 { 1720 struct sctppcbhead *head; 1721 struct sctp_inpcb *t_inp; 1722 int fnd; 1723 1724 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1725 SCTP_BASE_INFO(hashmark))]; 1726 LIST_FOREACH(t_inp, head, sctp_hash) { 1727 if (t_inp->sctp_lport != lport) { 1728 continue; 1729 } 1730 /* is it in the VRF in question */ 1731 fnd = 0; 1732 if (t_inp->def_vrf_id == vrf_id) 1733 fnd = 1; 1734 if (!fnd) 1735 continue; 1736 1737 /* This one is in use. */ 1738 /* check the v6/v4 binding issue */ 1739 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1740 SCTP_IPV6_V6ONLY(t_inp)) { 1741 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1742 /* collision in V6 space */ 1743 return (t_inp); 1744 } else { 1745 /* inp is BOUND_V4 no conflict */ 1746 continue; 1747 } 1748 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1749 /* t_inp is bound v4 and v6, conflict always */ 1750 return (t_inp); 1751 } else { 1752 /* t_inp is bound only V4 */ 1753 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1754 SCTP_IPV6_V6ONLY(inp)) { 1755 /* no conflict */ 1756 continue; 1757 } 1758 /* else fall through to conflict */ 1759 } 1760 return (t_inp); 1761 } 1762 return (NULL); 1763 } 1764 1765 1766 int 1767 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1768 { 1769 /* For 1-2-1 with port reuse */ 1770 struct sctppcbhead *head; 1771 struct sctp_inpcb *tinp; 1772 1773 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1774 /* only works with port reuse on */ 1775 return (-1); 1776 } 1777 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1778 return (0); 1779 } 1780 SCTP_INP_RUNLOCK(inp); 1781 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1782 SCTP_BASE_INFO(hashmark))]; 1783 /* Kick out all non-listeners to the TCP hash */ 1784 LIST_FOREACH(tinp, head, sctp_hash) { 1785 if (tinp->sctp_lport != inp->sctp_lport) { 1786 continue; 1787 } 1788 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1789 continue; 1790 } 1791 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1792 continue; 1793 } 1794 if (tinp->sctp_socket->so_qlimit) { 1795 continue; 1796 } 1797 SCTP_INP_WLOCK(tinp); 1798 LIST_REMOVE(tinp, sctp_hash); 1799 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1800 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1801 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1802 SCTP_INP_WUNLOCK(tinp); 1803 } 1804 SCTP_INP_WLOCK(inp); 1805 /* Pull from where he was */ 1806 LIST_REMOVE(inp, sctp_hash); 1807 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1808 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1809 LIST_INSERT_HEAD(head, inp, sctp_hash); 1810 SCTP_INP_WUNLOCK(inp); 1811 SCTP_INP_RLOCK(inp); 1812 return (0); 1813 } 1814 1815 1816 struct sctp_inpcb * 1817 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1818 uint32_t vrf_id) 1819 { 1820 /* 1821 * First we check the hash table to see if someone has this port 1822 * bound with just the port. 1823 */ 1824 struct sctp_inpcb *inp; 1825 struct sctppcbhead *head; 1826 int lport; 1827 unsigned int i; 1828 1829 #ifdef INET 1830 struct sockaddr_in *sin; 1831 1832 #endif 1833 #ifdef INET6 1834 struct sockaddr_in6 *sin6; 1835 1836 #endif 1837 1838 switch (nam->sa_family) { 1839 #ifdef INET 1840 case AF_INET: 1841 sin = (struct sockaddr_in *)nam; 1842 lport = sin->sin_port; 1843 break; 1844 #endif 1845 #ifdef INET6 1846 case AF_INET6: 1847 sin6 = (struct sockaddr_in6 *)nam; 1848 lport = sin6->sin6_port; 1849 break; 1850 #endif 1851 default: 1852 return (NULL); 1853 } 1854 /* 1855 * I could cheat here and just cast to one of the types but we will 1856 * do it right. It also provides the check against an Unsupported 1857 * type too. 1858 */ 1859 /* Find the head of the ALLADDR chain */ 1860 if (have_lock == 0) { 1861 SCTP_INP_INFO_RLOCK(); 1862 } 1863 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1864 SCTP_BASE_INFO(hashmark))]; 1865 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1866 1867 /* 1868 * If the TCP model exists it could be that the main listening 1869 * endpoint is gone but there still exists a connected socket for 1870 * this guy. If so we can return the first one that we find. This 1871 * may NOT be the correct one so the caller should be wary on the 1872 * returned INP. Currently the only caller that sets find_tcp_pool 1873 * is in bindx where we are verifying that a user CAN bind the 1874 * address. He either has bound it already, or someone else has, or 1875 * its open to bind, so this is good enough. 1876 */ 1877 if (inp == NULL && find_tcp_pool) { 1878 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1879 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1880 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1881 if (inp) { 1882 break; 1883 } 1884 } 1885 } 1886 if (inp) { 1887 SCTP_INP_INCR_REF(inp); 1888 } 1889 if (have_lock == 0) { 1890 SCTP_INP_INFO_RUNLOCK(); 1891 } 1892 return (inp); 1893 } 1894 1895 /* 1896 * Find an association for an endpoint with the pointer to whom you want to 1897 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1898 * need to change the *to to some other struct like a mbuf... 1899 */ 1900 struct sctp_tcb * 1901 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1902 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1903 uint32_t vrf_id) 1904 { 1905 struct sctp_inpcb *inp = NULL; 1906 struct sctp_tcb *retval; 1907 1908 SCTP_INP_INFO_RLOCK(); 1909 if (find_tcp_pool) { 1910 if (inp_p != NULL) { 1911 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1912 vrf_id); 1913 } else { 1914 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1915 vrf_id); 1916 } 1917 if (retval != NULL) { 1918 SCTP_INP_INFO_RUNLOCK(); 1919 return (retval); 1920 } 1921 } 1922 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1923 if (inp_p != NULL) { 1924 *inp_p = inp; 1925 } 1926 SCTP_INP_INFO_RUNLOCK(); 1927 1928 if (inp == NULL) { 1929 return (NULL); 1930 } 1931 /* 1932 * ok, we have an endpoint, now lets find the assoc for it (if any) 1933 * we now place the source address or from in the to of the find 1934 * endpoint call. Since in reality this chain is used from the 1935 * inbound packet side. 1936 */ 1937 if (inp_p != NULL) { 1938 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1939 NULL); 1940 } else { 1941 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1942 NULL); 1943 } 1944 return retval; 1945 } 1946 1947 1948 /* 1949 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1950 * find all addresses that the sender has specified in any address list. Each 1951 * address will be used to lookup the TCB and see if one exits. 1952 */ 1953 static struct sctp_tcb * 1954 sctp_findassociation_special_addr(struct mbuf *m, int offset, 1955 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1956 struct sockaddr *dst) 1957 { 1958 struct sctp_paramhdr *phdr, parm_buf; 1959 struct sctp_tcb *retval; 1960 uint32_t ptype, plen; 1961 1962 #ifdef INET 1963 struct sockaddr_in sin4; 1964 1965 #endif 1966 #ifdef INET6 1967 struct sockaddr_in6 sin6; 1968 1969 #endif 1970 1971 #ifdef INET 1972 memset(&sin4, 0, sizeof(sin4)); 1973 sin4.sin_len = sizeof(sin4); 1974 sin4.sin_family = AF_INET; 1975 sin4.sin_port = sh->src_port; 1976 #endif 1977 #ifdef INET6 1978 memset(&sin6, 0, sizeof(sin6)); 1979 sin6.sin6_len = sizeof(sin6); 1980 sin6.sin6_family = AF_INET6; 1981 sin6.sin6_port = sh->src_port; 1982 #endif 1983 1984 retval = NULL; 1985 offset += sizeof(struct sctp_init_chunk); 1986 1987 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1988 while (phdr != NULL) { 1989 /* now we must see if we want the parameter */ 1990 ptype = ntohs(phdr->param_type); 1991 plen = ntohs(phdr->param_length); 1992 if (plen == 0) { 1993 break; 1994 } 1995 #ifdef INET 1996 if (ptype == SCTP_IPV4_ADDRESS && 1997 plen == sizeof(struct sctp_ipv4addr_param)) { 1998 /* Get the rest of the address */ 1999 struct sctp_ipv4addr_param ip4_parm, *p4; 2000 2001 phdr = sctp_get_next_param(m, offset, 2002 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2003 if (phdr == NULL) { 2004 return (NULL); 2005 } 2006 p4 = (struct sctp_ipv4addr_param *)phdr; 2007 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2008 /* look it up */ 2009 retval = sctp_findassociation_ep_addr(inp_p, 2010 (struct sockaddr *)&sin4, netp, dst, NULL); 2011 if (retval != NULL) { 2012 return (retval); 2013 } 2014 } 2015 #endif 2016 #ifdef INET6 2017 if (ptype == SCTP_IPV6_ADDRESS && 2018 plen == sizeof(struct sctp_ipv6addr_param)) { 2019 /* Get the rest of the address */ 2020 struct sctp_ipv6addr_param ip6_parm, *p6; 2021 2022 phdr = sctp_get_next_param(m, offset, 2023 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2024 if (phdr == NULL) { 2025 return (NULL); 2026 } 2027 p6 = (struct sctp_ipv6addr_param *)phdr; 2028 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2029 /* look it up */ 2030 retval = sctp_findassociation_ep_addr(inp_p, 2031 (struct sockaddr *)&sin6, netp, dst, NULL); 2032 if (retval != NULL) { 2033 return (retval); 2034 } 2035 } 2036 #endif 2037 offset += SCTP_SIZE32(plen); 2038 phdr = sctp_get_next_param(m, offset, &parm_buf, 2039 sizeof(parm_buf)); 2040 } 2041 return (NULL); 2042 } 2043 2044 static struct sctp_tcb * 2045 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2046 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2047 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2048 { 2049 /* 2050 * Use my vtag to hash. If we find it we then verify the source addr 2051 * is in the assoc. If all goes well we save a bit on rec of a 2052 * packet. 2053 */ 2054 struct sctpasochead *head; 2055 struct sctp_nets *net; 2056 struct sctp_tcb *stcb; 2057 2058 SCTP_INP_INFO_RLOCK(); 2059 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2060 SCTP_BASE_INFO(hashasocmark))]; 2061 if (head == NULL) { 2062 /* invalid vtag */ 2063 SCTP_INP_INFO_RUNLOCK(); 2064 return (NULL); 2065 } 2066 LIST_FOREACH(stcb, head, sctp_asocs) { 2067 SCTP_INP_RLOCK(stcb->sctp_ep); 2068 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2069 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2070 continue; 2071 } 2072 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2073 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2074 continue; 2075 } 2076 SCTP_TCB_LOCK(stcb); 2077 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2078 if (stcb->asoc.my_vtag == vtag) { 2079 /* candidate */ 2080 if (stcb->rport != rport) { 2081 SCTP_TCB_UNLOCK(stcb); 2082 continue; 2083 } 2084 if (stcb->sctp_ep->sctp_lport != lport) { 2085 SCTP_TCB_UNLOCK(stcb); 2086 continue; 2087 } 2088 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2089 SCTP_TCB_UNLOCK(stcb); 2090 continue; 2091 } 2092 /* RRS:Need toaddr check here */ 2093 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2094 /* Endpoint does not own this address */ 2095 SCTP_TCB_UNLOCK(stcb); 2096 continue; 2097 } 2098 if (remote_tag) { 2099 /* 2100 * If we have both vtags that's all we match 2101 * on 2102 */ 2103 if (stcb->asoc.peer_vtag == remote_tag) { 2104 /* 2105 * If both tags match we consider it 2106 * conclusive and check NO 2107 * source/destination addresses 2108 */ 2109 goto conclusive; 2110 } 2111 } 2112 if (skip_src_check) { 2113 conclusive: 2114 if (from) { 2115 *netp = sctp_findnet(stcb, from); 2116 } else { 2117 *netp = NULL; /* unknown */ 2118 } 2119 if (inp_p) 2120 *inp_p = stcb->sctp_ep; 2121 SCTP_INP_INFO_RUNLOCK(); 2122 return (stcb); 2123 } 2124 net = sctp_findnet(stcb, from); 2125 if (net) { 2126 /* yep its him. */ 2127 *netp = net; 2128 SCTP_STAT_INCR(sctps_vtagexpress); 2129 *inp_p = stcb->sctp_ep; 2130 SCTP_INP_INFO_RUNLOCK(); 2131 return (stcb); 2132 } else { 2133 /* 2134 * not him, this should only happen in rare 2135 * cases so I peg it. 2136 */ 2137 SCTP_STAT_INCR(sctps_vtagbogus); 2138 } 2139 } 2140 SCTP_TCB_UNLOCK(stcb); 2141 } 2142 SCTP_INP_INFO_RUNLOCK(); 2143 return (NULL); 2144 } 2145 2146 /* 2147 * Find an association with the pointer to the inbound IP packet. This can be 2148 * a IPv4 or IPv6 packet. 2149 */ 2150 struct sctp_tcb * 2151 sctp_findassociation_addr(struct mbuf *m, int offset, 2152 struct sockaddr *src, struct sockaddr *dst, 2153 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2154 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2155 { 2156 int find_tcp_pool; 2157 struct sctp_tcb *retval; 2158 struct sctp_inpcb *inp; 2159 2160 if (sh->v_tag) { 2161 /* we only go down this path if vtag is non-zero */ 2162 retval = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2163 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2164 if (retval) { 2165 return (retval); 2166 } 2167 } 2168 find_tcp_pool = 0; 2169 if ((ch->chunk_type != SCTP_INITIATION) && 2170 (ch->chunk_type != SCTP_INITIATION_ACK) && 2171 (ch->chunk_type != SCTP_COOKIE_ACK) && 2172 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2173 /* Other chunk types go to the tcp pool. */ 2174 find_tcp_pool = 1; 2175 } 2176 if (inp_p) { 2177 retval = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2178 find_tcp_pool, vrf_id); 2179 inp = *inp_p; 2180 } else { 2181 retval = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2182 find_tcp_pool, vrf_id); 2183 } 2184 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2185 if (retval == NULL && inp) { 2186 /* Found a EP but not this address */ 2187 if ((ch->chunk_type == SCTP_INITIATION) || 2188 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2189 /*- 2190 * special hook, we do NOT return linp or an 2191 * association that is linked to an existing 2192 * association that is under the TCP pool (i.e. no 2193 * listener exists). The endpoint finding routine 2194 * will always find a listener before examining the 2195 * TCP pool. 2196 */ 2197 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2198 if (inp_p) { 2199 *inp_p = NULL; 2200 } 2201 return (NULL); 2202 } 2203 retval = sctp_findassociation_special_addr(m, 2204 offset, sh, &inp, netp, dst); 2205 if (inp_p != NULL) { 2206 *inp_p = inp; 2207 } 2208 } 2209 } 2210 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2211 return (retval); 2212 } 2213 2214 /* 2215 * lookup an association by an ASCONF lookup address. 2216 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2217 */ 2218 struct sctp_tcb * 2219 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2220 struct sockaddr *dst, struct sctphdr *sh, 2221 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2222 { 2223 struct sctp_tcb *stcb; 2224 struct sockaddr_storage remote_store; 2225 struct sctp_paramhdr parm_buf, *phdr; 2226 int ptype; 2227 int zero_address = 0; 2228 2229 #ifdef INET 2230 struct sockaddr_in *sin; 2231 2232 #endif 2233 #ifdef INET6 2234 struct sockaddr_in6 *sin6; 2235 2236 #endif 2237 2238 memset(&remote_store, 0, sizeof(remote_store)); 2239 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2240 &parm_buf, sizeof(struct sctp_paramhdr)); 2241 if (phdr == NULL) { 2242 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2243 __FUNCTION__); 2244 return NULL; 2245 } 2246 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2247 /* get the correlation address */ 2248 switch (ptype) { 2249 #ifdef INET6 2250 case SCTP_IPV6_ADDRESS: 2251 { 2252 /* ipv6 address param */ 2253 struct sctp_ipv6addr_param *p6, p6_buf; 2254 2255 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2256 return NULL; 2257 } 2258 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2259 offset + sizeof(struct sctp_asconf_chunk), 2260 &p6_buf.ph, sizeof(*p6)); 2261 if (p6 == NULL) { 2262 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2263 __FUNCTION__); 2264 return (NULL); 2265 } 2266 sin6 = (struct sockaddr_in6 *)&remote_store; 2267 sin6->sin6_family = AF_INET6; 2268 sin6->sin6_len = sizeof(*sin6); 2269 sin6->sin6_port = sh->src_port; 2270 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2271 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2272 zero_address = 1; 2273 break; 2274 } 2275 #endif 2276 #ifdef INET 2277 case SCTP_IPV4_ADDRESS: 2278 { 2279 /* ipv4 address param */ 2280 struct sctp_ipv4addr_param *p4, p4_buf; 2281 2282 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2283 return NULL; 2284 } 2285 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2286 offset + sizeof(struct sctp_asconf_chunk), 2287 &p4_buf.ph, sizeof(*p4)); 2288 if (p4 == NULL) { 2289 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2290 __FUNCTION__); 2291 return (NULL); 2292 } 2293 sin = (struct sockaddr_in *)&remote_store; 2294 sin->sin_family = AF_INET; 2295 sin->sin_len = sizeof(*sin); 2296 sin->sin_port = sh->src_port; 2297 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2298 if (sin->sin_addr.s_addr == INADDR_ANY) 2299 zero_address = 1; 2300 break; 2301 } 2302 #endif 2303 default: 2304 /* invalid address param type */ 2305 return NULL; 2306 } 2307 2308 if (zero_address) { 2309 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2310 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2311 if (stcb != NULL) { 2312 SCTP_INP_DECR_REF(*inp_p); 2313 } 2314 } else { 2315 stcb = sctp_findassociation_ep_addr(inp_p, 2316 (struct sockaddr *)&remote_store, netp, 2317 dst, NULL); 2318 } 2319 return (stcb); 2320 } 2321 2322 2323 /* 2324 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2325 * addresses. This way if we don't get a bind we by default pick a ephemeral 2326 * port with all addresses bound. 2327 */ 2328 int 2329 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2330 { 2331 /* 2332 * we get called when a new endpoint starts up. We need to allocate 2333 * the sctp_inpcb structure from the zone and init it. Mark it as 2334 * unbound and find a port that we can use as an ephemeral with 2335 * INADDR_ANY. If the user binds later no problem we can then add in 2336 * the specific addresses. And setup the default parameters for the 2337 * EP. 2338 */ 2339 int i, error; 2340 struct sctp_inpcb *inp; 2341 struct sctp_pcb *m; 2342 struct timeval time; 2343 sctp_sharedkey_t *null_key; 2344 2345 error = 0; 2346 2347 SCTP_INP_INFO_WLOCK(); 2348 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2349 if (inp == NULL) { 2350 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2351 SCTP_INP_INFO_WUNLOCK(); 2352 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2353 return (ENOBUFS); 2354 } 2355 /* zap it */ 2356 bzero(inp, sizeof(*inp)); 2357 2358 /* bump generations */ 2359 /* setup socket pointers */ 2360 inp->sctp_socket = so; 2361 inp->ip_inp.inp.inp_socket = so; 2362 #ifdef INET6 2363 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2364 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2365 } 2366 #endif 2367 inp->sctp_associd_counter = 1; 2368 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2369 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2370 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2371 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2372 /* init the small hash table we use to track asocid <-> tcb */ 2373 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2374 if (inp->sctp_asocidhash == NULL) { 2375 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2376 SCTP_INP_INFO_WUNLOCK(); 2377 return (ENOBUFS); 2378 } 2379 #ifdef IPSEC 2380 { 2381 struct inpcbpolicy *pcb_sp = NULL; 2382 2383 error = ipsec_init_policy(so, &pcb_sp); 2384 /* Arrange to share the policy */ 2385 inp->ip_inp.inp.inp_sp = pcb_sp; 2386 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2387 } 2388 if (error != 0) { 2389 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2390 SCTP_INP_INFO_WUNLOCK(); 2391 return error; 2392 } 2393 #endif /* IPSEC */ 2394 SCTP_INCR_EP_COUNT(); 2395 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2396 SCTP_INP_INFO_WUNLOCK(); 2397 2398 so->so_pcb = (caddr_t)inp; 2399 2400 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2401 /* UDP style socket */ 2402 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2403 SCTP_PCB_FLAGS_UNBOUND); 2404 /* Be sure it is NON-BLOCKING IO for UDP */ 2405 /* SCTP_SET_SO_NBIO(so); */ 2406 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2407 /* TCP style socket */ 2408 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2409 SCTP_PCB_FLAGS_UNBOUND); 2410 /* Be sure we have blocking IO by default */ 2411 SCTP_CLEAR_SO_NBIO(so); 2412 } else { 2413 /* 2414 * unsupported socket type (RAW, etc)- in case we missed it 2415 * in protosw 2416 */ 2417 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2418 so->so_pcb = NULL; 2419 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2420 return (EOPNOTSUPP); 2421 } 2422 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2423 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2424 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2425 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2426 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2427 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2428 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2429 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2430 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2431 } 2432 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2433 &inp->sctp_hashmark); 2434 if (inp->sctp_tcbhash == NULL) { 2435 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2436 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2437 so->so_pcb = NULL; 2438 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2439 return (ENOBUFS); 2440 } 2441 inp->def_vrf_id = vrf_id; 2442 2443 SCTP_INP_INFO_WLOCK(); 2444 SCTP_INP_LOCK_INIT(inp); 2445 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2446 SCTP_INP_READ_INIT(inp); 2447 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2448 /* lock the new ep */ 2449 SCTP_INP_WLOCK(inp); 2450 2451 /* add it to the info area */ 2452 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2453 SCTP_INP_INFO_WUNLOCK(); 2454 2455 TAILQ_INIT(&inp->read_queue); 2456 LIST_INIT(&inp->sctp_addr_list); 2457 2458 LIST_INIT(&inp->sctp_asoc_list); 2459 2460 #ifdef SCTP_TRACK_FREED_ASOCS 2461 /* TEMP CODE */ 2462 LIST_INIT(&inp->sctp_asoc_free_list); 2463 #endif 2464 /* Init the timer structure for signature change */ 2465 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2466 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2467 2468 /* now init the actual endpoint default data */ 2469 m = &inp->sctp_ep; 2470 2471 /* setup the base timeout information */ 2472 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2473 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2474 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2475 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2476 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2477 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2478 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2479 /* all max/min max are in ms */ 2480 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2481 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2482 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2483 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2484 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2485 2486 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2487 2488 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2489 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2490 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2491 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2492 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2493 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2494 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2495 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2496 2497 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2498 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2499 /* number of streams to pre-open on a association */ 2500 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2501 2502 /* Add adaptation cookie */ 2503 m->adaptation_layer_indicator = 0x504C5253; 2504 2505 /* seed random number generator */ 2506 m->random_counter = 1; 2507 m->store_at = SCTP_SIGNATURE_SIZE; 2508 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2509 sctp_fill_random_store(m); 2510 2511 /* Minimum cookie size */ 2512 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2513 sizeof(struct sctp_state_cookie); 2514 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2515 2516 /* Setup the initial secret */ 2517 (void)SCTP_GETTIME_TIMEVAL(&time); 2518 m->time_of_secret_change = time.tv_sec; 2519 2520 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2521 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2522 } 2523 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2524 2525 /* How long is a cookie good for ? */ 2526 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2527 /* 2528 * Initialize authentication parameters 2529 */ 2530 m->local_hmacs = sctp_default_supported_hmaclist(); 2531 m->local_auth_chunks = sctp_alloc_chunklist(); 2532 m->default_dscp = 0; 2533 #ifdef INET6 2534 m->default_flowlabel = 0; 2535 #endif 2536 m->port = 0; /* encapsulation disabled by default */ 2537 sctp_auth_set_default_chunks(m->local_auth_chunks); 2538 LIST_INIT(&m->shared_keys); 2539 /* add default NULL key as key id 0 */ 2540 null_key = sctp_alloc_sharedkey(); 2541 sctp_insert_sharedkey(&m->shared_keys, null_key); 2542 SCTP_INP_WUNLOCK(inp); 2543 #ifdef SCTP_LOG_CLOSING 2544 sctp_log_closing(inp, NULL, 12); 2545 #endif 2546 return (error); 2547 } 2548 2549 2550 void 2551 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2552 struct sctp_tcb *stcb) 2553 { 2554 struct sctp_nets *net; 2555 uint16_t lport, rport; 2556 struct sctppcbhead *head; 2557 struct sctp_laddr *laddr, *oladdr; 2558 2559 atomic_add_int(&stcb->asoc.refcnt, 1); 2560 SCTP_TCB_UNLOCK(stcb); 2561 SCTP_INP_INFO_WLOCK(); 2562 SCTP_INP_WLOCK(old_inp); 2563 SCTP_INP_WLOCK(new_inp); 2564 SCTP_TCB_LOCK(stcb); 2565 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2566 2567 new_inp->sctp_ep.time_of_secret_change = 2568 old_inp->sctp_ep.time_of_secret_change; 2569 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2570 sizeof(old_inp->sctp_ep.secret_key)); 2571 new_inp->sctp_ep.current_secret_number = 2572 old_inp->sctp_ep.current_secret_number; 2573 new_inp->sctp_ep.last_secret_number = 2574 old_inp->sctp_ep.last_secret_number; 2575 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2576 2577 /* make it so new data pours into the new socket */ 2578 stcb->sctp_socket = new_inp->sctp_socket; 2579 stcb->sctp_ep = new_inp; 2580 2581 /* Copy the port across */ 2582 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2583 rport = stcb->rport; 2584 /* Pull the tcb from the old association */ 2585 LIST_REMOVE(stcb, sctp_tcbhash); 2586 LIST_REMOVE(stcb, sctp_tcblist); 2587 if (stcb->asoc.in_asocid_hash) { 2588 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2589 } 2590 /* Now insert the new_inp into the TCP connected hash */ 2591 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2592 2593 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2594 /* Its safe to access */ 2595 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2596 2597 /* Now move the tcb into the endpoint list */ 2598 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2599 /* 2600 * Question, do we even need to worry about the ep-hash since we 2601 * only have one connection? Probably not :> so lets get rid of it 2602 * and not suck up any kernel memory in that. 2603 */ 2604 if (stcb->asoc.in_asocid_hash) { 2605 struct sctpasochead *lhd; 2606 2607 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2608 new_inp->hashasocidmark)]; 2609 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2610 } 2611 /* Ok. Let's restart timer. */ 2612 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2613 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2614 stcb, net); 2615 } 2616 2617 SCTP_INP_INFO_WUNLOCK(); 2618 if (new_inp->sctp_tcbhash != NULL) { 2619 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2620 new_inp->sctp_tcbhash = NULL; 2621 } 2622 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2623 /* Subset bound, so copy in the laddr list from the old_inp */ 2624 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2625 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2626 if (laddr == NULL) { 2627 /* 2628 * Gak, what can we do? This assoc is really 2629 * HOSED. We probably should send an abort 2630 * here. 2631 */ 2632 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2633 continue; 2634 } 2635 SCTP_INCR_LADDR_COUNT(); 2636 bzero(laddr, sizeof(*laddr)); 2637 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2638 laddr->ifa = oladdr->ifa; 2639 atomic_add_int(&laddr->ifa->refcount, 1); 2640 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2641 sctp_nxt_addr); 2642 new_inp->laddr_count++; 2643 if (oladdr == stcb->asoc.last_used_address) { 2644 stcb->asoc.last_used_address = laddr; 2645 } 2646 } 2647 } 2648 /* 2649 * Now any running timers need to be adjusted since we really don't 2650 * care if they are running or not just blast in the new_inp into 2651 * all of them. 2652 */ 2653 2654 stcb->asoc.dack_timer.ep = (void *)new_inp; 2655 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2656 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2657 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2658 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2659 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2660 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2661 /* now what about the nets? */ 2662 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2663 net->pmtu_timer.ep = (void *)new_inp; 2664 net->hb_timer.ep = (void *)new_inp; 2665 net->rxt_timer.ep = (void *)new_inp; 2666 } 2667 SCTP_INP_WUNLOCK(new_inp); 2668 SCTP_INP_WUNLOCK(old_inp); 2669 } 2670 2671 2672 2673 2674 /* sctp_ifap is used to bypass normal local address validation checks */ 2675 int 2676 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2677 struct sctp_ifa *sctp_ifap, struct thread *p) 2678 { 2679 /* bind a ep to a socket address */ 2680 struct sctppcbhead *head; 2681 struct sctp_inpcb *inp, *inp_tmp; 2682 struct inpcb *ip_inp; 2683 int port_reuse_active = 0; 2684 int bindall; 2685 uint16_t lport; 2686 int error; 2687 uint32_t vrf_id; 2688 2689 lport = 0; 2690 error = 0; 2691 bindall = 1; 2692 inp = (struct sctp_inpcb *)so->so_pcb; 2693 ip_inp = (struct inpcb *)so->so_pcb; 2694 #ifdef SCTP_DEBUG 2695 if (addr) { 2696 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2697 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2698 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2699 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2700 } 2701 #endif 2702 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2703 /* already did a bind, subsequent binds NOT allowed ! */ 2704 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2705 return (EINVAL); 2706 } 2707 #ifdef INVARIANTS 2708 if (p == NULL) 2709 panic("null proc/thread"); 2710 #endif 2711 if (addr != NULL) { 2712 switch (addr->sa_family) { 2713 #ifdef INET 2714 case AF_INET: 2715 { 2716 struct sockaddr_in *sin; 2717 2718 /* IPV6_V6ONLY socket? */ 2719 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2720 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2721 return (EINVAL); 2722 } 2723 if (addr->sa_len != sizeof(*sin)) { 2724 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2725 return (EINVAL); 2726 } 2727 sin = (struct sockaddr_in *)addr; 2728 lport = sin->sin_port; 2729 /* 2730 * For LOOPBACK the prison_local_ip4() call 2731 * will transmute the ip address to the 2732 * proper value. 2733 */ 2734 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2735 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2736 return (error); 2737 } 2738 if (sin->sin_addr.s_addr != INADDR_ANY) { 2739 bindall = 0; 2740 } 2741 break; 2742 } 2743 #endif 2744 #ifdef INET6 2745 case AF_INET6: 2746 { 2747 /* 2748 * Only for pure IPv6 Address. (No IPv4 2749 * Mapped!) 2750 */ 2751 struct sockaddr_in6 *sin6; 2752 2753 sin6 = (struct sockaddr_in6 *)addr; 2754 2755 if (addr->sa_len != sizeof(*sin6)) { 2756 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2757 return (EINVAL); 2758 } 2759 lport = sin6->sin6_port; 2760 2761 /* 2762 * For LOOPBACK the prison_local_ip6() call 2763 * will transmute the ipv6 address to the 2764 * proper value. 2765 */ 2766 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2767 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2768 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2769 return (error); 2770 } 2771 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2772 bindall = 0; 2773 /* KAME hack: embed scopeid */ 2774 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2775 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2776 return (EINVAL); 2777 } 2778 } 2779 /* this must be cleared for ifa_ifwithaddr() */ 2780 sin6->sin6_scope_id = 0; 2781 break; 2782 } 2783 #endif 2784 default: 2785 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2786 return (EAFNOSUPPORT); 2787 } 2788 } 2789 SCTP_INP_INFO_WLOCK(); 2790 SCTP_INP_WLOCK(inp); 2791 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2792 vrf_id = inp->def_vrf_id; 2793 2794 /* increase our count due to the unlock we do */ 2795 SCTP_INP_INCR_REF(inp); 2796 if (lport) { 2797 /* 2798 * Did the caller specify a port? if so we must see if a ep 2799 * already has this one bound. 2800 */ 2801 /* got to be root to get at low ports */ 2802 if (ntohs(lport) < IPPORT_RESERVED) { 2803 if (p && (error = 2804 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2805 )) { 2806 SCTP_INP_DECR_REF(inp); 2807 SCTP_INP_WUNLOCK(inp); 2808 SCTP_INP_INFO_WUNLOCK(); 2809 return (error); 2810 } 2811 } 2812 if (p == NULL) { 2813 SCTP_INP_DECR_REF(inp); 2814 SCTP_INP_WUNLOCK(inp); 2815 SCTP_INP_INFO_WUNLOCK(); 2816 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2817 return (error); 2818 } 2819 SCTP_INP_WUNLOCK(inp); 2820 if (bindall) { 2821 vrf_id = inp->def_vrf_id; 2822 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2823 if (inp_tmp != NULL) { 2824 /* 2825 * lock guy returned and lower count note 2826 * that we are not bound so inp_tmp should 2827 * NEVER be inp. And it is this inp 2828 * (inp_tmp) that gets the reference bump, 2829 * so we must lower it. 2830 */ 2831 SCTP_INP_DECR_REF(inp_tmp); 2832 /* unlock info */ 2833 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2834 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2835 /* 2836 * Ok, must be one-2-one and 2837 * allowing port re-use 2838 */ 2839 port_reuse_active = 1; 2840 goto continue_anyway; 2841 } 2842 SCTP_INP_DECR_REF(inp); 2843 SCTP_INP_INFO_WUNLOCK(); 2844 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2845 return (EADDRINUSE); 2846 } 2847 } else { 2848 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2849 if (inp_tmp != NULL) { 2850 /* 2851 * lock guy returned and lower count note 2852 * that we are not bound so inp_tmp should 2853 * NEVER be inp. And it is this inp 2854 * (inp_tmp) that gets the reference bump, 2855 * so we must lower it. 2856 */ 2857 SCTP_INP_DECR_REF(inp_tmp); 2858 /* unlock info */ 2859 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2860 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2861 /* 2862 * Ok, must be one-2-one and 2863 * allowing port re-use 2864 */ 2865 port_reuse_active = 1; 2866 goto continue_anyway; 2867 } 2868 SCTP_INP_DECR_REF(inp); 2869 SCTP_INP_INFO_WUNLOCK(); 2870 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2871 return (EADDRINUSE); 2872 } 2873 } 2874 continue_anyway: 2875 SCTP_INP_WLOCK(inp); 2876 if (bindall) { 2877 /* verify that no lport is not used by a singleton */ 2878 if ((port_reuse_active == 0) && 2879 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2880 ) { 2881 /* Sorry someone already has this one bound */ 2882 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2883 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2884 port_reuse_active = 1; 2885 } else { 2886 SCTP_INP_DECR_REF(inp); 2887 SCTP_INP_WUNLOCK(inp); 2888 SCTP_INP_INFO_WUNLOCK(); 2889 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2890 return (EADDRINUSE); 2891 } 2892 } 2893 } 2894 } else { 2895 uint16_t first, last, candidate; 2896 uint16_t count; 2897 int done; 2898 2899 if (ip_inp->inp_flags & INP_HIGHPORT) { 2900 first = MODULE_GLOBAL(ipport_hifirstauto); 2901 last = MODULE_GLOBAL(ipport_hilastauto); 2902 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2903 if (p && (error = 2904 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2905 )) { 2906 SCTP_INP_DECR_REF(inp); 2907 SCTP_INP_WUNLOCK(inp); 2908 SCTP_INP_INFO_WUNLOCK(); 2909 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2910 return (error); 2911 } 2912 first = MODULE_GLOBAL(ipport_lowfirstauto); 2913 last = MODULE_GLOBAL(ipport_lowlastauto); 2914 } else { 2915 first = MODULE_GLOBAL(ipport_firstauto); 2916 last = MODULE_GLOBAL(ipport_lastauto); 2917 } 2918 if (first > last) { 2919 uint16_t temp; 2920 2921 temp = first; 2922 first = last; 2923 last = temp; 2924 } 2925 count = last - first + 1; /* number of candidates */ 2926 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2927 2928 done = 0; 2929 while (!done) { 2930 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2931 done = 1; 2932 } 2933 if (!done) { 2934 if (--count == 0) { 2935 SCTP_INP_DECR_REF(inp); 2936 SCTP_INP_WUNLOCK(inp); 2937 SCTP_INP_INFO_WUNLOCK(); 2938 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2939 return (EADDRINUSE); 2940 } 2941 if (candidate == last) 2942 candidate = first; 2943 else 2944 candidate = candidate + 1; 2945 } 2946 } 2947 lport = htons(candidate); 2948 } 2949 SCTP_INP_DECR_REF(inp); 2950 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2951 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2952 /* 2953 * this really should not happen. The guy did a non-blocking 2954 * bind and then did a close at the same time. 2955 */ 2956 SCTP_INP_WUNLOCK(inp); 2957 SCTP_INP_INFO_WUNLOCK(); 2958 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2959 return (EINVAL); 2960 } 2961 /* ok we look clear to give out this port, so lets setup the binding */ 2962 if (bindall) { 2963 /* binding to all addresses, so just set in the proper flags */ 2964 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2965 /* set the automatic addr changes from kernel flag */ 2966 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2967 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2968 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2969 } else { 2970 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2971 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2972 } 2973 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2974 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2975 } else { 2976 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2977 } 2978 /* 2979 * set the automatic mobility_base from kernel flag (by 2980 * micchie) 2981 */ 2982 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 2983 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 2984 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2985 } else { 2986 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 2987 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2988 } 2989 /* 2990 * set the automatic mobility_fasthandoff from kernel flag 2991 * (by micchie) 2992 */ 2993 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 2994 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 2995 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2996 } else { 2997 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 2998 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2999 } 3000 } else { 3001 /* 3002 * bind specific, make sure flags is off and add a new 3003 * address structure to the sctp_addr_list inside the ep 3004 * structure. 3005 * 3006 * We will need to allocate one and insert it at the head. The 3007 * socketopt call can just insert new addresses in there as 3008 * well. It will also have to do the embed scope kame hack 3009 * too (before adding). 3010 */ 3011 struct sctp_ifa *ifa; 3012 struct sockaddr_storage store_sa; 3013 3014 memset(&store_sa, 0, sizeof(store_sa)); 3015 switch (addr->sa_family) { 3016 #ifdef INET 3017 case AF_INET: 3018 { 3019 struct sockaddr_in *sin; 3020 3021 sin = (struct sockaddr_in *)&store_sa; 3022 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3023 sin->sin_port = 0; 3024 break; 3025 } 3026 #endif 3027 #ifdef INET6 3028 case AF_INET6: 3029 { 3030 struct sockaddr_in6 *sin6; 3031 3032 sin6 = (struct sockaddr_in6 *)&store_sa; 3033 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3034 sin6->sin6_port = 0; 3035 break; 3036 } 3037 #endif 3038 default: 3039 break; 3040 } 3041 /* 3042 * first find the interface with the bound address need to 3043 * zero out the port to find the address! yuck! can't do 3044 * this earlier since need port for sctp_pcb_findep() 3045 */ 3046 if (sctp_ifap != NULL) 3047 ifa = sctp_ifap; 3048 else { 3049 /* 3050 * Note for BSD we hit here always other O/S's will 3051 * pass things in via the sctp_ifap argument 3052 * (Panda). 3053 */ 3054 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3055 vrf_id, SCTP_ADDR_NOT_LOCKED); 3056 } 3057 if (ifa == NULL) { 3058 /* Can't find an interface with that address */ 3059 SCTP_INP_WUNLOCK(inp); 3060 SCTP_INP_INFO_WUNLOCK(); 3061 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3062 return (EADDRNOTAVAIL); 3063 } 3064 #ifdef INET6 3065 if (addr->sa_family == AF_INET6) { 3066 /* GAK, more FIXME IFA lock? */ 3067 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3068 /* Can't bind a non-existent addr. */ 3069 SCTP_INP_WUNLOCK(inp); 3070 SCTP_INP_INFO_WUNLOCK(); 3071 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3072 return (EINVAL); 3073 } 3074 } 3075 #endif 3076 /* we're not bound all */ 3077 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3078 /* allow bindx() to send ASCONF's for binding changes */ 3079 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3080 /* clear automatic addr changes from kernel flag */ 3081 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3082 3083 /* add this address to the endpoint list */ 3084 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3085 if (error != 0) { 3086 SCTP_INP_WUNLOCK(inp); 3087 SCTP_INP_INFO_WUNLOCK(); 3088 return (error); 3089 } 3090 inp->laddr_count++; 3091 } 3092 /* find the bucket */ 3093 if (port_reuse_active) { 3094 /* Put it into tcp 1-2-1 hash */ 3095 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3096 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3097 } else { 3098 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3099 } 3100 /* put it in the bucket */ 3101 LIST_INSERT_HEAD(head, inp, sctp_hash); 3102 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3103 head, ntohs(lport), port_reuse_active); 3104 /* set in the port */ 3105 inp->sctp_lport = lport; 3106 3107 /* turn off just the unbound flag */ 3108 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3109 SCTP_INP_WUNLOCK(inp); 3110 SCTP_INP_INFO_WUNLOCK(); 3111 return (0); 3112 } 3113 3114 3115 static void 3116 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3117 { 3118 struct sctp_iterator *it, *nit; 3119 3120 /* 3121 * We enter with the only the ITERATOR_LOCK in place and a write 3122 * lock on the inp_info stuff. 3123 */ 3124 it = sctp_it_ctl.cur_it; 3125 if (it && (it->vn != curvnet)) { 3126 /* Its not looking at our VNET */ 3127 return; 3128 } 3129 if (it && (it->inp == inp)) { 3130 /* 3131 * This is tricky and we hold the iterator lock, but when it 3132 * returns and gets the lock (when we release it) the 3133 * iterator will try to operate on inp. We need to stop that 3134 * from happening. But of course the iterator has a 3135 * reference on the stcb and inp. We can mark it and it will 3136 * stop. 3137 * 3138 * If its a single iterator situation, we set the end iterator 3139 * flag. Otherwise we set the iterator to go to the next 3140 * inp. 3141 * 3142 */ 3143 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3144 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3145 } else { 3146 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3147 } 3148 } 3149 /* 3150 * Now go through and remove any single reference to our inp that 3151 * may be still pending on the list 3152 */ 3153 SCTP_IPI_ITERATOR_WQ_LOCK(); 3154 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3155 if (it->vn != curvnet) { 3156 continue; 3157 } 3158 if (it->inp == inp) { 3159 /* This one points to me is it inp specific? */ 3160 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3161 /* Remove and free this one */ 3162 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3163 it, sctp_nxt_itr); 3164 if (it->function_atend != NULL) { 3165 (*it->function_atend) (it->pointer, it->val); 3166 } 3167 SCTP_FREE(it, SCTP_M_ITER); 3168 } else { 3169 it->inp = LIST_NEXT(it->inp, sctp_list); 3170 if (it->inp) { 3171 SCTP_INP_INCR_REF(it->inp); 3172 } 3173 } 3174 /* 3175 * When its put in the refcnt is incremented so decr 3176 * it 3177 */ 3178 SCTP_INP_DECR_REF(inp); 3179 } 3180 } 3181 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3182 } 3183 3184 /* release sctp_inpcb unbind the port */ 3185 void 3186 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3187 { 3188 /* 3189 * Here we free a endpoint. We must find it (if it is in the Hash 3190 * table) and remove it from there. Then we must also find it in the 3191 * overall list and remove it from there. After all removals are 3192 * complete then any timer has to be stopped. Then start the actual 3193 * freeing. a) Any local lists. b) Any associations. c) The hash of 3194 * all associations. d) finally the ep itself. 3195 */ 3196 struct sctp_tcb *asoc, *nasoc; 3197 struct sctp_laddr *laddr, *nladdr; 3198 struct inpcb *ip_pcb; 3199 struct socket *so; 3200 int being_refed = 0; 3201 struct sctp_queued_to_read *sq, *nsq; 3202 int cnt; 3203 sctp_sharedkey_t *shared_key, *nshared_key; 3204 3205 3206 #ifdef SCTP_LOG_CLOSING 3207 sctp_log_closing(inp, NULL, 0); 3208 #endif 3209 SCTP_ITERATOR_LOCK(); 3210 /* mark any iterators on the list or being processed */ 3211 sctp_iterator_inp_being_freed(inp); 3212 SCTP_ITERATOR_UNLOCK(); 3213 so = inp->sctp_socket; 3214 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3215 /* been here before.. eeks.. get out of here */ 3216 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3217 #ifdef SCTP_LOG_CLOSING 3218 sctp_log_closing(inp, NULL, 1); 3219 #endif 3220 return; 3221 } 3222 SCTP_ASOC_CREATE_LOCK(inp); 3223 SCTP_INP_INFO_WLOCK(); 3224 3225 SCTP_INP_WLOCK(inp); 3226 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3227 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3228 /* socket is gone, so no more wakeups allowed */ 3229 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3230 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3231 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3232 3233 } 3234 /* First time through we have the socket lock, after that no more. */ 3235 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3236 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3237 3238 if (inp->control) { 3239 sctp_m_freem(inp->control); 3240 inp->control = NULL; 3241 } 3242 if (inp->pkt) { 3243 sctp_m_freem(inp->pkt); 3244 inp->pkt = NULL; 3245 } 3246 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3247 * here but I will be nice :> (i.e. 3248 * ip_pcb = ep;) */ 3249 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3250 int cnt_in_sd; 3251 3252 cnt_in_sd = 0; 3253 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3254 SCTP_TCB_LOCK(asoc); 3255 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3256 /* Skip guys being freed */ 3257 cnt_in_sd++; 3258 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3259 /* 3260 * Special case - we did not start a 3261 * kill timer on the asoc due to it 3262 * was not closed. So go ahead and 3263 * start it now. 3264 */ 3265 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3266 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3267 } 3268 SCTP_TCB_UNLOCK(asoc); 3269 continue; 3270 } 3271 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3272 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3273 (asoc->asoc.total_output_queue_size == 0)) { 3274 /* 3275 * If we have data in queue, we don't want 3276 * to just free since the app may have done, 3277 * send()/close or connect/send/close. And 3278 * it wants the data to get across first. 3279 */ 3280 /* Just abandon things in the front states */ 3281 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3282 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3283 cnt_in_sd++; 3284 } 3285 continue; 3286 } 3287 /* Disconnect the socket please */ 3288 asoc->sctp_socket = NULL; 3289 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3290 if ((asoc->asoc.size_on_reasm_queue > 0) || 3291 (asoc->asoc.control_pdapi) || 3292 (asoc->asoc.size_on_all_streams > 0) || 3293 (so && (so->so_rcv.sb_cc > 0))) { 3294 /* Left with Data unread */ 3295 struct mbuf *op_err; 3296 3297 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3298 0, M_DONTWAIT, 1, MT_DATA); 3299 if (op_err) { 3300 /* Fill in the user initiated abort */ 3301 struct sctp_paramhdr *ph; 3302 uint32_t *ippp; 3303 3304 SCTP_BUF_LEN(op_err) = 3305 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3306 ph = mtod(op_err, 3307 struct sctp_paramhdr *); 3308 ph->param_type = htons( 3309 SCTP_CAUSE_USER_INITIATED_ABT); 3310 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3311 ippp = (uint32_t *) (ph + 1); 3312 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3313 } 3314 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3315 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3316 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3317 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3318 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3319 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3320 } 3321 if (sctp_free_assoc(inp, asoc, 3322 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3323 cnt_in_sd++; 3324 } 3325 continue; 3326 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3327 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3328 (asoc->asoc.stream_queue_cnt == 0) 3329 ) { 3330 if (asoc->asoc.locked_on_sending) { 3331 goto abort_anyway; 3332 } 3333 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3334 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3335 struct sctp_nets *netp; 3336 3337 if (asoc->asoc.alternate) { 3338 netp = asoc->asoc.alternate; 3339 } else { 3340 netp = asoc->asoc.primary_destination; 3341 } 3342 /* 3343 * there is nothing queued to send, 3344 * so I send shutdown 3345 */ 3346 sctp_send_shutdown(asoc, netp); 3347 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3348 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3349 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3350 } 3351 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3352 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3353 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3354 netp); 3355 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3356 asoc->asoc.primary_destination); 3357 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3358 } 3359 } else { 3360 /* mark into shutdown pending */ 3361 struct sctp_stream_queue_pending *sp; 3362 3363 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3364 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3365 asoc->asoc.primary_destination); 3366 if (asoc->asoc.locked_on_sending) { 3367 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3368 sctp_streamhead); 3369 if (sp == NULL) { 3370 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3371 asoc->asoc.locked_on_sending, 3372 asoc->asoc.locked_on_sending->stream_no); 3373 } else { 3374 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3375 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3376 } 3377 } 3378 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3379 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3380 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3381 struct mbuf *op_err; 3382 3383 abort_anyway: 3384 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3385 0, M_DONTWAIT, 1, MT_DATA); 3386 if (op_err) { 3387 /* 3388 * Fill in the user 3389 * initiated abort 3390 */ 3391 struct sctp_paramhdr *ph; 3392 uint32_t *ippp; 3393 3394 SCTP_BUF_LEN(op_err) = 3395 (sizeof(struct sctp_paramhdr) + 3396 sizeof(uint32_t)); 3397 ph = mtod(op_err, 3398 struct sctp_paramhdr *); 3399 ph->param_type = htons( 3400 SCTP_CAUSE_USER_INITIATED_ABT); 3401 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3402 ippp = (uint32_t *) (ph + 1); 3403 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3404 } 3405 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3406 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3407 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3408 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3409 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3410 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3411 } 3412 if (sctp_free_assoc(inp, asoc, 3413 SCTP_PCBFREE_NOFORCE, 3414 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3415 cnt_in_sd++; 3416 } 3417 continue; 3418 } else { 3419 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3420 } 3421 } 3422 cnt_in_sd++; 3423 SCTP_TCB_UNLOCK(asoc); 3424 } 3425 /* now is there some left in our SHUTDOWN state? */ 3426 if (cnt_in_sd) { 3427 #ifdef SCTP_LOG_CLOSING 3428 sctp_log_closing(inp, NULL, 2); 3429 #endif 3430 inp->sctp_socket = NULL; 3431 SCTP_INP_WUNLOCK(inp); 3432 SCTP_ASOC_CREATE_UNLOCK(inp); 3433 SCTP_INP_INFO_WUNLOCK(); 3434 return; 3435 } 3436 } 3437 inp->sctp_socket = NULL; 3438 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3439 SCTP_PCB_FLAGS_UNBOUND) { 3440 /* 3441 * ok, this guy has been bound. It's port is somewhere in 3442 * the SCTP_BASE_INFO(hash table). Remove it! 3443 */ 3444 LIST_REMOVE(inp, sctp_hash); 3445 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3446 } 3447 /* 3448 * If there is a timer running to kill us, forget it, since it may 3449 * have a contest on the INP lock.. which would cause us to die ... 3450 */ 3451 cnt = 0; 3452 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3453 SCTP_TCB_LOCK(asoc); 3454 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3455 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3456 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3457 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3458 } 3459 cnt++; 3460 SCTP_TCB_UNLOCK(asoc); 3461 continue; 3462 } 3463 /* Free associations that are NOT killing us */ 3464 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3465 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3466 struct mbuf *op_err; 3467 uint32_t *ippp; 3468 3469 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3470 0, M_DONTWAIT, 1, MT_DATA); 3471 if (op_err) { 3472 /* Fill in the user initiated abort */ 3473 struct sctp_paramhdr *ph; 3474 3475 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3476 sizeof(uint32_t)); 3477 ph = mtod(op_err, struct sctp_paramhdr *); 3478 ph->param_type = htons( 3479 SCTP_CAUSE_USER_INITIATED_ABT); 3480 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3481 ippp = (uint32_t *) (ph + 1); 3482 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3483 3484 } 3485 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3486 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3487 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3488 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3489 cnt++; 3490 SCTP_TCB_UNLOCK(asoc); 3491 continue; 3492 } 3493 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3494 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3495 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3496 } 3497 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3498 cnt++; 3499 } 3500 } 3501 if (cnt) { 3502 /* Ok we have someone out there that will kill us */ 3503 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3504 #ifdef SCTP_LOG_CLOSING 3505 sctp_log_closing(inp, NULL, 3); 3506 #endif 3507 SCTP_INP_WUNLOCK(inp); 3508 SCTP_ASOC_CREATE_UNLOCK(inp); 3509 SCTP_INP_INFO_WUNLOCK(); 3510 return; 3511 } 3512 if (SCTP_INP_LOCK_CONTENDED(inp)) 3513 being_refed++; 3514 if (SCTP_INP_READ_CONTENDED(inp)) 3515 being_refed++; 3516 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3517 being_refed++; 3518 3519 if ((inp->refcount) || 3520 (being_refed) || 3521 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3522 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3523 #ifdef SCTP_LOG_CLOSING 3524 sctp_log_closing(inp, NULL, 4); 3525 #endif 3526 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3527 SCTP_INP_WUNLOCK(inp); 3528 SCTP_ASOC_CREATE_UNLOCK(inp); 3529 SCTP_INP_INFO_WUNLOCK(); 3530 return; 3531 } 3532 inp->sctp_ep.signature_change.type = 0; 3533 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3534 /* 3535 * Remove it from the list .. last thing we need a lock for. 3536 */ 3537 LIST_REMOVE(inp, sctp_list); 3538 SCTP_INP_WUNLOCK(inp); 3539 SCTP_ASOC_CREATE_UNLOCK(inp); 3540 SCTP_INP_INFO_WUNLOCK(); 3541 /* 3542 * Now we release all locks. Since this INP cannot be found anymore 3543 * except possibly by the kill timer that might be running. We call 3544 * the drain function here. It should hit the case were it sees the 3545 * ACTIVE flag cleared and exit out freeing us to proceed and 3546 * destroy everything. 3547 */ 3548 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3549 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3550 } else { 3551 /* Probably un-needed */ 3552 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3553 } 3554 3555 #ifdef SCTP_LOG_CLOSING 3556 sctp_log_closing(inp, NULL, 5); 3557 #endif 3558 3559 3560 if ((inp->sctp_asocidhash) != NULL) { 3561 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3562 inp->sctp_asocidhash = NULL; 3563 } 3564 /* sa_ignore FREED_MEMORY */ 3565 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3566 /* Its only abandoned if it had data left */ 3567 if (sq->length) 3568 SCTP_STAT_INCR(sctps_left_abandon); 3569 3570 TAILQ_REMOVE(&inp->read_queue, sq, next); 3571 sctp_free_remote_addr(sq->whoFrom); 3572 if (so) 3573 so->so_rcv.sb_cc -= sq->length; 3574 if (sq->data) { 3575 sctp_m_freem(sq->data); 3576 sq->data = NULL; 3577 } 3578 /* 3579 * no need to free the net count, since at this point all 3580 * assoc's are gone. 3581 */ 3582 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3583 SCTP_DECR_READQ_COUNT(); 3584 } 3585 /* Now the sctp_pcb things */ 3586 /* 3587 * free each asoc if it is not already closed/free. we can't use the 3588 * macro here since le_next will get freed as part of the 3589 * sctp_free_assoc() call. 3590 */ 3591 if (so) { 3592 #ifdef IPSEC 3593 ipsec_delete_pcbpolicy(ip_pcb); 3594 #endif /* IPSEC */ 3595 3596 /* Unlocks not needed since the socket is gone now */ 3597 } 3598 if (ip_pcb->inp_options) { 3599 (void)sctp_m_free(ip_pcb->inp_options); 3600 ip_pcb->inp_options = 0; 3601 } 3602 #ifdef INET6 3603 if (ip_pcb->inp_vflag & INP_IPV6) { 3604 struct in6pcb *in6p; 3605 3606 in6p = (struct in6pcb *)inp; 3607 ip6_freepcbopts(in6p->in6p_outputopts); 3608 } 3609 #endif /* INET6 */ 3610 ip_pcb->inp_vflag = 0; 3611 /* free up authentication fields */ 3612 if (inp->sctp_ep.local_auth_chunks != NULL) 3613 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3614 if (inp->sctp_ep.local_hmacs != NULL) 3615 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3616 3617 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3618 LIST_REMOVE(shared_key, next); 3619 sctp_free_sharedkey(shared_key); 3620 /* sa_ignore FREED_MEMORY */ 3621 } 3622 3623 /* 3624 * if we have an address list the following will free the list of 3625 * ifaddr's that are set into this ep. Again macro limitations here, 3626 * since the LIST_FOREACH could be a bad idea. 3627 */ 3628 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3629 sctp_remove_laddr(laddr); 3630 } 3631 3632 #ifdef SCTP_TRACK_FREED_ASOCS 3633 /* TEMP CODE */ 3634 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3635 LIST_REMOVE(asoc, sctp_tcblist); 3636 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3637 SCTP_DECR_ASOC_COUNT(); 3638 } 3639 /* *** END TEMP CODE *** */ 3640 #endif 3641 /* Now lets see about freeing the EP hash table. */ 3642 if (inp->sctp_tcbhash != NULL) { 3643 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3644 inp->sctp_tcbhash = NULL; 3645 } 3646 /* Now we must put the ep memory back into the zone pool */ 3647 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3648 SCTP_INP_LOCK_DESTROY(inp); 3649 SCTP_INP_READ_DESTROY(inp); 3650 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3651 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3652 SCTP_DECR_EP_COUNT(); 3653 } 3654 3655 3656 struct sctp_nets * 3657 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3658 { 3659 struct sctp_nets *net; 3660 3661 /* locate the address */ 3662 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3663 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3664 return (net); 3665 } 3666 return (NULL); 3667 } 3668 3669 3670 int 3671 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3672 { 3673 struct sctp_ifa *sctp_ifa; 3674 3675 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3676 if (sctp_ifa) { 3677 return (1); 3678 } else { 3679 return (0); 3680 } 3681 } 3682 3683 /* 3684 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3685 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3686 * stats of stuff. 3687 */ 3688 int 3689 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3690 struct sctp_nets **netp, int set_scope, int from) 3691 { 3692 /* 3693 * The following is redundant to the same lines in the 3694 * sctp_aloc_assoc() but is needed since others call the add address 3695 * function 3696 */ 3697 struct sctp_nets *net, *netfirst; 3698 int addr_inscope; 3699 3700 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3701 from); 3702 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3703 3704 netfirst = sctp_findnet(stcb, newaddr); 3705 if (netfirst) { 3706 /* 3707 * Lie and return ok, we don't want to make the association 3708 * go away for this behavior. It will happen in the TCP 3709 * model in a connected socket. It does not reach the hash 3710 * table until after the association is built so it can't be 3711 * found. Mark as reachable, since the initial creation will 3712 * have been cleared and the NOT_IN_ASSOC flag will have 3713 * been added... and we don't want to end up removing it 3714 * back out. 3715 */ 3716 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3717 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3718 SCTP_ADDR_UNCONFIRMED); 3719 } else { 3720 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3721 } 3722 3723 return (0); 3724 } 3725 addr_inscope = 1; 3726 switch (newaddr->sa_family) { 3727 #ifdef INET 3728 case AF_INET: 3729 { 3730 struct sockaddr_in *sin; 3731 3732 sin = (struct sockaddr_in *)newaddr; 3733 if (sin->sin_addr.s_addr == 0) { 3734 /* Invalid address */ 3735 return (-1); 3736 } 3737 /* zero out the bzero area */ 3738 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3739 3740 /* assure len is set */ 3741 sin->sin_len = sizeof(struct sockaddr_in); 3742 if (set_scope) { 3743 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3744 stcb->ipv4_local_scope = 1; 3745 #else 3746 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3747 stcb->asoc.ipv4_local_scope = 1; 3748 } 3749 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3750 } else { 3751 /* Validate the address is in scope */ 3752 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3753 (stcb->asoc.ipv4_local_scope == 0)) { 3754 addr_inscope = 0; 3755 } 3756 } 3757 break; 3758 } 3759 #endif 3760 #ifdef INET6 3761 case AF_INET6: 3762 { 3763 struct sockaddr_in6 *sin6; 3764 3765 sin6 = (struct sockaddr_in6 *)newaddr; 3766 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3767 /* Invalid address */ 3768 return (-1); 3769 } 3770 /* assure len is set */ 3771 sin6->sin6_len = sizeof(struct sockaddr_in6); 3772 if (set_scope) { 3773 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3774 stcb->asoc.loopback_scope = 1; 3775 stcb->asoc.local_scope = 0; 3776 stcb->asoc.ipv4_local_scope = 1; 3777 stcb->asoc.site_scope = 1; 3778 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3779 /* 3780 * If the new destination is a 3781 * LINK_LOCAL we must have common 3782 * site scope. Don't set the local 3783 * scope since we may not share all 3784 * links, only loopback can do this. 3785 * Links on the local network would 3786 * also be on our private network 3787 * for v4 too. 3788 */ 3789 stcb->asoc.ipv4_local_scope = 1; 3790 stcb->asoc.site_scope = 1; 3791 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3792 /* 3793 * If the new destination is 3794 * SITE_LOCAL then we must have site 3795 * scope in common. 3796 */ 3797 stcb->asoc.site_scope = 1; 3798 } 3799 } else { 3800 /* Validate the address is in scope */ 3801 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3802 (stcb->asoc.loopback_scope == 0)) { 3803 addr_inscope = 0; 3804 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3805 (stcb->asoc.local_scope == 0)) { 3806 addr_inscope = 0; 3807 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3808 (stcb->asoc.site_scope == 0)) { 3809 addr_inscope = 0; 3810 } 3811 } 3812 break; 3813 } 3814 #endif 3815 default: 3816 /* not supported family type */ 3817 return (-1); 3818 } 3819 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3820 if (net == NULL) { 3821 return (-1); 3822 } 3823 SCTP_INCR_RADDR_COUNT(); 3824 bzero(net, sizeof(struct sctp_nets)); 3825 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3826 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3827 switch (newaddr->sa_family) { 3828 #ifdef INET 3829 case AF_INET: 3830 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3831 break; 3832 #endif 3833 #ifdef INET6 3834 case AF_INET6: 3835 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3836 break; 3837 #endif 3838 default: 3839 break; 3840 } 3841 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3842 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3843 stcb->asoc.loopback_scope = 1; 3844 stcb->asoc.ipv4_local_scope = 1; 3845 stcb->asoc.local_scope = 0; 3846 stcb->asoc.site_scope = 1; 3847 addr_inscope = 1; 3848 } 3849 net->failure_threshold = stcb->asoc.def_net_failure; 3850 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3851 if (addr_inscope == 0) { 3852 net->dest_state = (SCTP_ADDR_REACHABLE | 3853 SCTP_ADDR_OUT_OF_SCOPE); 3854 } else { 3855 if (from == SCTP_ADDR_IS_CONFIRMED) 3856 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3857 net->dest_state = SCTP_ADDR_REACHABLE; 3858 else 3859 net->dest_state = SCTP_ADDR_REACHABLE | 3860 SCTP_ADDR_UNCONFIRMED; 3861 } 3862 /* 3863 * We set this to 0, the timer code knows that this means its an 3864 * initial value 3865 */ 3866 net->rto_needed = 1; 3867 net->RTO = 0; 3868 net->RTO_measured = 0; 3869 stcb->asoc.numnets++; 3870 net->ref_count = 1; 3871 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3872 net->port = stcb->asoc.port; 3873 net->dscp = stcb->asoc.default_dscp; 3874 #ifdef INET6 3875 net->flowlabel = stcb->asoc.default_flowlabel; 3876 #endif 3877 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3878 net->dest_state |= SCTP_ADDR_NOHB; 3879 } else { 3880 net->dest_state &= ~SCTP_ADDR_NOHB; 3881 } 3882 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3883 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3884 } else { 3885 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3886 } 3887 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3888 /* Init the timer structure */ 3889 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3890 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3891 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3892 3893 /* Now generate a route for this guy */ 3894 #ifdef INET6 3895 /* KAME hack: embed scopeid */ 3896 if (newaddr->sa_family == AF_INET6) { 3897 struct sockaddr_in6 *sin6; 3898 3899 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3900 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3901 sin6->sin6_scope_id = 0; 3902 } 3903 #endif 3904 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3905 3906 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3907 /* Get source address */ 3908 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3909 stcb, 3910 (sctp_route_t *) & net->ro, 3911 net, 3912 0, 3913 stcb->asoc.vrf_id); 3914 /* Now get the interface MTU */ 3915 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3916 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3917 } 3918 if (net->mtu > 0) { 3919 uint32_t rmtu; 3920 3921 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3922 if (rmtu == 0) { 3923 /* 3924 * Start things off to match mtu of 3925 * interface please. 3926 */ 3927 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3928 net->ro.ro_rt, net->mtu); 3929 } else { 3930 /* 3931 * we take the route mtu over the interface, 3932 * since the route may be leading out the 3933 * loopback, or a different interface. 3934 */ 3935 net->mtu = rmtu; 3936 } 3937 } 3938 } 3939 if (net->mtu == 0) { 3940 switch (newaddr->sa_family) { 3941 #ifdef INET 3942 case AF_INET: 3943 net->mtu = SCTP_DEFAULT_MTU; 3944 break; 3945 #endif 3946 #ifdef INET6 3947 case AF_INET6: 3948 net->mtu = 1280; 3949 break; 3950 #endif 3951 default: 3952 break; 3953 } 3954 } 3955 if (net->port) { 3956 net->mtu -= (uint32_t) sizeof(struct udphdr); 3957 } 3958 if (from == SCTP_ALLOC_ASOC) { 3959 stcb->asoc.smallest_mtu = net->mtu; 3960 } 3961 if (stcb->asoc.smallest_mtu > net->mtu) { 3962 stcb->asoc.smallest_mtu = net->mtu; 3963 } 3964 #ifdef INET6 3965 if (newaddr->sa_family == AF_INET6) { 3966 struct sockaddr_in6 *sin6; 3967 3968 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3969 (void)sa6_recoverscope(sin6); 3970 } 3971 #endif 3972 3973 /* JRS - Use the congestion control given in the CC module */ 3974 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 3975 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 3976 3977 /* 3978 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3979 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3980 */ 3981 net->find_pseudo_cumack = 1; 3982 net->find_rtx_pseudo_cumack = 1; 3983 net->src_addr_selected = 0; 3984 /* Choose an initial flowid. */ 3985 net->flowid = stcb->asoc.my_vtag ^ 3986 ntohs(stcb->rport) ^ 3987 ntohs(stcb->sctp_ep->sctp_lport); 3988 #ifdef INVARIANTS 3989 net->flowidset = 1; 3990 #endif 3991 if (netp) { 3992 *netp = net; 3993 } 3994 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3995 if (net->ro.ro_rt == NULL) { 3996 /* Since we have no route put it at the back */ 3997 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3998 } else if (netfirst == NULL) { 3999 /* We are the first one in the pool. */ 4000 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4001 } else if (netfirst->ro.ro_rt == NULL) { 4002 /* 4003 * First one has NO route. Place this one ahead of the first 4004 * one. 4005 */ 4006 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4007 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4008 /* 4009 * This one has a different interface than the one at the 4010 * top of the list. Place it ahead. 4011 */ 4012 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4013 } else { 4014 /* 4015 * Ok we have the same interface as the first one. Move 4016 * forward until we find either a) one with a NULL route... 4017 * insert ahead of that b) one with a different ifp.. insert 4018 * after that. c) end of the list.. insert at the tail. 4019 */ 4020 struct sctp_nets *netlook; 4021 4022 do { 4023 netlook = TAILQ_NEXT(netfirst, sctp_next); 4024 if (netlook == NULL) { 4025 /* End of the list */ 4026 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4027 break; 4028 } else if (netlook->ro.ro_rt == NULL) { 4029 /* next one has NO route */ 4030 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4031 break; 4032 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4033 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4034 net, sctp_next); 4035 break; 4036 } 4037 /* Shift forward */ 4038 netfirst = netlook; 4039 } while (netlook != NULL); 4040 } 4041 4042 /* got to have a primary set */ 4043 if (stcb->asoc.primary_destination == 0) { 4044 stcb->asoc.primary_destination = net; 4045 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4046 (net->ro.ro_rt) && 4047 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4048 /* No route to current primary adopt new primary */ 4049 stcb->asoc.primary_destination = net; 4050 } 4051 /* Validate primary is first */ 4052 net = TAILQ_FIRST(&stcb->asoc.nets); 4053 if ((net != stcb->asoc.primary_destination) && 4054 (stcb->asoc.primary_destination)) { 4055 /* 4056 * first one on the list is NOT the primary sctp_cmpaddr() 4057 * is much more efficient if the primary is the first on the 4058 * list, make it so. 4059 */ 4060 TAILQ_REMOVE(&stcb->asoc.nets, 4061 stcb->asoc.primary_destination, sctp_next); 4062 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4063 stcb->asoc.primary_destination, sctp_next); 4064 } 4065 return (0); 4066 } 4067 4068 4069 static uint32_t 4070 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4071 { 4072 uint32_t id; 4073 struct sctpasochead *head; 4074 struct sctp_tcb *lstcb; 4075 4076 SCTP_INP_WLOCK(inp); 4077 try_again: 4078 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4079 /* TSNH */ 4080 SCTP_INP_WUNLOCK(inp); 4081 return (0); 4082 } 4083 /* 4084 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4085 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4086 */ 4087 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4088 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4089 } 4090 id = inp->sctp_associd_counter; 4091 inp->sctp_associd_counter++; 4092 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4093 if (lstcb) { 4094 goto try_again; 4095 } 4096 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4097 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4098 stcb->asoc.in_asocid_hash = 1; 4099 SCTP_INP_WUNLOCK(inp); 4100 return id; 4101 } 4102 4103 /* 4104 * allocate an association and add it to the endpoint. The caller must be 4105 * careful to add all additional addresses once they are know right away or 4106 * else the assoc will be may experience a blackout scenario. 4107 */ 4108 struct sctp_tcb * 4109 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4110 int *error, uint32_t override_tag, uint32_t vrf_id, 4111 struct thread *p 4112 ) 4113 { 4114 /* note the p argument is only valid in unbound sockets */ 4115 4116 struct sctp_tcb *stcb; 4117 struct sctp_association *asoc; 4118 struct sctpasochead *head; 4119 uint16_t rport; 4120 int err; 4121 4122 /* 4123 * Assumption made here: Caller has done a 4124 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4125 * address does not exist already. 4126 */ 4127 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4128 /* Hit max assoc, sorry no more */ 4129 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4130 *error = ENOBUFS; 4131 return (NULL); 4132 } 4133 if (firstaddr == NULL) { 4134 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4135 *error = EINVAL; 4136 return (NULL); 4137 } 4138 SCTP_INP_RLOCK(inp); 4139 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4140 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4141 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4142 /* 4143 * If its in the TCP pool, its NOT allowed to create an 4144 * association. The parent listener needs to call 4145 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4146 * off, or connected one does this.. its an error. 4147 */ 4148 SCTP_INP_RUNLOCK(inp); 4149 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4150 *error = EINVAL; 4151 return (NULL); 4152 } 4153 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4154 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4155 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4156 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4157 SCTP_INP_RUNLOCK(inp); 4158 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4159 *error = EINVAL; 4160 return (NULL); 4161 } 4162 } 4163 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4164 #ifdef SCTP_DEBUG 4165 if (firstaddr) { 4166 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4167 switch (firstaddr->sa_family) { 4168 #ifdef INET 4169 case AF_INET: 4170 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4171 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4172 break; 4173 #endif 4174 #ifdef INET6 4175 case AF_INET6: 4176 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4177 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4178 break; 4179 #endif 4180 default: 4181 break; 4182 } 4183 } else { 4184 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4185 } 4186 #endif /* SCTP_DEBUG */ 4187 switch (firstaddr->sa_family) { 4188 #ifdef INET 4189 case AF_INET: 4190 { 4191 struct sockaddr_in *sin; 4192 4193 sin = (struct sockaddr_in *)firstaddr; 4194 if ((ntohs(sin->sin_port) == 0) || 4195 (sin->sin_addr.s_addr == INADDR_ANY) || 4196 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4197 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4198 /* Invalid address */ 4199 SCTP_INP_RUNLOCK(inp); 4200 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4201 *error = EINVAL; 4202 return (NULL); 4203 } 4204 rport = sin->sin_port; 4205 break; 4206 } 4207 #endif 4208 #ifdef INET6 4209 case AF_INET6: 4210 { 4211 struct sockaddr_in6 *sin6; 4212 4213 sin6 = (struct sockaddr_in6 *)firstaddr; 4214 if ((ntohs(sin6->sin6_port) == 0) || 4215 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4216 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4217 /* Invalid address */ 4218 SCTP_INP_RUNLOCK(inp); 4219 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4220 *error = EINVAL; 4221 return (NULL); 4222 } 4223 rport = sin6->sin6_port; 4224 break; 4225 } 4226 #endif 4227 default: 4228 /* not supported family type */ 4229 SCTP_INP_RUNLOCK(inp); 4230 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4231 *error = EINVAL; 4232 return (NULL); 4233 } 4234 SCTP_INP_RUNLOCK(inp); 4235 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4236 /* 4237 * If you have not performed a bind, then we need to do the 4238 * ephemeral bind for you. 4239 */ 4240 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4241 (struct sockaddr *)NULL, 4242 (struct sctp_ifa *)NULL, 4243 p 4244 ))) { 4245 /* bind error, probably perm */ 4246 *error = err; 4247 return (NULL); 4248 } 4249 } 4250 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4251 if (stcb == NULL) { 4252 /* out of memory? */ 4253 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4254 *error = ENOMEM; 4255 return (NULL); 4256 } 4257 SCTP_INCR_ASOC_COUNT(); 4258 4259 bzero(stcb, sizeof(*stcb)); 4260 asoc = &stcb->asoc; 4261 4262 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4263 SCTP_TCB_LOCK_INIT(stcb); 4264 SCTP_TCB_SEND_LOCK_INIT(stcb); 4265 stcb->rport = rport; 4266 /* setup back pointer's */ 4267 stcb->sctp_ep = inp; 4268 stcb->sctp_socket = inp->sctp_socket; 4269 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4270 /* failed */ 4271 SCTP_TCB_LOCK_DESTROY(stcb); 4272 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4273 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4274 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4275 SCTP_DECR_ASOC_COUNT(); 4276 *error = err; 4277 return (NULL); 4278 } 4279 /* and the port */ 4280 SCTP_INP_INFO_WLOCK(); 4281 SCTP_INP_WLOCK(inp); 4282 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4283 /* inpcb freed while alloc going on */ 4284 SCTP_TCB_LOCK_DESTROY(stcb); 4285 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4286 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4287 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4288 SCTP_INP_WUNLOCK(inp); 4289 SCTP_INP_INFO_WUNLOCK(); 4290 SCTP_DECR_ASOC_COUNT(); 4291 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4292 *error = EINVAL; 4293 return (NULL); 4294 } 4295 SCTP_TCB_LOCK(stcb); 4296 4297 /* now that my_vtag is set, add it to the hash */ 4298 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4299 /* put it in the bucket in the vtag hash of assoc's for the system */ 4300 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4301 SCTP_INP_INFO_WUNLOCK(); 4302 4303 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4304 /* failure.. memory error? */ 4305 if (asoc->strmout) { 4306 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4307 asoc->strmout = NULL; 4308 } 4309 if (asoc->mapping_array) { 4310 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4311 asoc->mapping_array = NULL; 4312 } 4313 if (asoc->nr_mapping_array) { 4314 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4315 asoc->nr_mapping_array = NULL; 4316 } 4317 SCTP_DECR_ASOC_COUNT(); 4318 SCTP_TCB_LOCK_DESTROY(stcb); 4319 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4320 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4321 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4322 SCTP_INP_WUNLOCK(inp); 4323 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4324 *error = ENOBUFS; 4325 return (NULL); 4326 } 4327 /* Init all the timers */ 4328 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4329 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4330 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4331 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4332 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4333 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4334 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4335 4336 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4337 /* now file the port under the hash as well */ 4338 if (inp->sctp_tcbhash != NULL) { 4339 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4340 inp->sctp_hashmark)]; 4341 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4342 } 4343 SCTP_INP_WUNLOCK(inp); 4344 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4345 return (stcb); 4346 } 4347 4348 4349 void 4350 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4351 { 4352 struct sctp_association *asoc; 4353 4354 asoc = &stcb->asoc; 4355 asoc->numnets--; 4356 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4357 if (net == asoc->primary_destination) { 4358 /* Reset primary */ 4359 struct sctp_nets *lnet; 4360 4361 lnet = TAILQ_FIRST(&asoc->nets); 4362 /* 4363 * Mobility adaptation Ideally, if deleted destination is 4364 * the primary, it becomes a fast retransmission trigger by 4365 * the subsequent SET PRIMARY. (by micchie) 4366 */ 4367 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4368 SCTP_MOBILITY_BASE) || 4369 sctp_is_mobility_feature_on(stcb->sctp_ep, 4370 SCTP_MOBILITY_FASTHANDOFF)) { 4371 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4372 if (asoc->deleted_primary != NULL) { 4373 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4374 goto out; 4375 } 4376 asoc->deleted_primary = net; 4377 atomic_add_int(&net->ref_count, 1); 4378 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4379 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4380 sctp_mobility_feature_on(stcb->sctp_ep, 4381 SCTP_MOBILITY_PRIM_DELETED); 4382 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4383 stcb->sctp_ep, stcb, NULL); 4384 } 4385 out: 4386 /* Try to find a confirmed primary */ 4387 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4388 } 4389 if (net == asoc->last_data_chunk_from) { 4390 /* Reset primary */ 4391 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4392 } 4393 if (net == asoc->last_control_chunk_from) { 4394 /* Clear net */ 4395 asoc->last_control_chunk_from = NULL; 4396 } 4397 if (net == stcb->asoc.alternate) { 4398 sctp_free_remote_addr(stcb->asoc.alternate); 4399 stcb->asoc.alternate = NULL; 4400 } 4401 sctp_free_remote_addr(net); 4402 } 4403 4404 /* 4405 * remove a remote endpoint address from an association, it will fail if the 4406 * address does not exist. 4407 */ 4408 int 4409 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4410 { 4411 /* 4412 * Here we need to remove a remote address. This is quite simple, we 4413 * first find it in the list of address for the association 4414 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4415 * on that item. Note we do not allow it to be removed if there are 4416 * no other addresses. 4417 */ 4418 struct sctp_association *asoc; 4419 struct sctp_nets *net, *nnet; 4420 4421 asoc = &stcb->asoc; 4422 4423 /* locate the address */ 4424 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4425 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4426 continue; 4427 } 4428 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4429 remaddr)) { 4430 /* we found the guy */ 4431 if (asoc->numnets < 2) { 4432 /* Must have at LEAST two remote addresses */ 4433 return (-1); 4434 } else { 4435 sctp_remove_net(stcb, net); 4436 return (0); 4437 } 4438 } 4439 } 4440 /* not found. */ 4441 return (-2); 4442 } 4443 4444 void 4445 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4446 { 4447 struct sctpvtaghead *chain; 4448 struct sctp_tagblock *twait_block; 4449 int found = 0; 4450 int i; 4451 4452 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4453 if (!LIST_EMPTY(chain)) { 4454 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4455 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4456 if ((twait_block->vtag_block[i].v_tag == tag) && 4457 (twait_block->vtag_block[i].lport == lport) && 4458 (twait_block->vtag_block[i].rport == rport)) { 4459 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4460 twait_block->vtag_block[i].v_tag = 0; 4461 twait_block->vtag_block[i].lport = 0; 4462 twait_block->vtag_block[i].rport = 0; 4463 found = 1; 4464 break; 4465 } 4466 } 4467 if (found) 4468 break; 4469 } 4470 } 4471 } 4472 4473 int 4474 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4475 { 4476 struct sctpvtaghead *chain; 4477 struct sctp_tagblock *twait_block; 4478 int found = 0; 4479 int i; 4480 4481 SCTP_INP_INFO_WLOCK(); 4482 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4483 if (!LIST_EMPTY(chain)) { 4484 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4485 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4486 if ((twait_block->vtag_block[i].v_tag == tag) && 4487 (twait_block->vtag_block[i].lport == lport) && 4488 (twait_block->vtag_block[i].rport == rport)) { 4489 found = 1; 4490 break; 4491 } 4492 } 4493 if (found) 4494 break; 4495 } 4496 } 4497 SCTP_INP_INFO_WUNLOCK(); 4498 return (found); 4499 } 4500 4501 4502 void 4503 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4504 { 4505 struct sctpvtaghead *chain; 4506 struct sctp_tagblock *twait_block; 4507 struct timeval now; 4508 int set, i; 4509 4510 if (time == 0) { 4511 /* Its disabled */ 4512 return; 4513 } 4514 (void)SCTP_GETTIME_TIMEVAL(&now); 4515 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4516 set = 0; 4517 if (!LIST_EMPTY(chain)) { 4518 /* Block(s) present, lets find space, and expire on the fly */ 4519 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4520 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4521 if ((twait_block->vtag_block[i].v_tag == 0) && 4522 !set) { 4523 twait_block->vtag_block[i].tv_sec_at_expire = 4524 now.tv_sec + time; 4525 twait_block->vtag_block[i].v_tag = tag; 4526 twait_block->vtag_block[i].lport = lport; 4527 twait_block->vtag_block[i].rport = rport; 4528 set = 1; 4529 } else if ((twait_block->vtag_block[i].v_tag) && 4530 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4531 /* Audit expires this guy */ 4532 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4533 twait_block->vtag_block[i].v_tag = 0; 4534 twait_block->vtag_block[i].lport = 0; 4535 twait_block->vtag_block[i].rport = 0; 4536 if (set == 0) { 4537 /* Reuse it for my new tag */ 4538 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4539 twait_block->vtag_block[i].v_tag = tag; 4540 twait_block->vtag_block[i].lport = lport; 4541 twait_block->vtag_block[i].rport = rport; 4542 set = 1; 4543 } 4544 } 4545 } 4546 if (set) { 4547 /* 4548 * We only do up to the block where we can 4549 * place our tag for audits 4550 */ 4551 break; 4552 } 4553 } 4554 } 4555 /* Need to add a new block to chain */ 4556 if (!set) { 4557 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4558 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4559 if (twait_block == NULL) { 4560 #ifdef INVARIANTS 4561 panic("Can not alloc tagblock"); 4562 #endif 4563 return; 4564 } 4565 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4566 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4567 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4568 twait_block->vtag_block[0].v_tag = tag; 4569 twait_block->vtag_block[0].lport = lport; 4570 twait_block->vtag_block[0].rport = rport; 4571 } 4572 } 4573 4574 4575 4576 /*- 4577 * Free the association after un-hashing the remote port. This 4578 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4579 * expect that the input to this function IS a locked TCB. 4580 * It will return 0, if it did NOT destroy the association (instead 4581 * it unlocks it. It will return NON-zero if it either destroyed the 4582 * association OR the association is already destroyed. 4583 */ 4584 int 4585 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4586 { 4587 int i; 4588 struct sctp_association *asoc; 4589 struct sctp_nets *net, *nnet; 4590 struct sctp_laddr *laddr, *naddr; 4591 struct sctp_tmit_chunk *chk, *nchk; 4592 struct sctp_asconf_addr *aparam, *naparam; 4593 struct sctp_asconf_ack *aack, *naack; 4594 struct sctp_stream_reset_list *strrst, *nstrrst; 4595 struct sctp_queued_to_read *sq, *nsq; 4596 struct sctp_stream_queue_pending *sp, *nsp; 4597 sctp_sharedkey_t *shared_key, *nshared_key; 4598 struct socket *so; 4599 4600 /* first, lets purge the entry from the hash table. */ 4601 4602 #ifdef SCTP_LOG_CLOSING 4603 sctp_log_closing(inp, stcb, 6); 4604 #endif 4605 if (stcb->asoc.state == 0) { 4606 #ifdef SCTP_LOG_CLOSING 4607 sctp_log_closing(inp, NULL, 7); 4608 #endif 4609 /* there is no asoc, really TSNH :-0 */ 4610 return (1); 4611 } 4612 if (stcb->asoc.alternate) { 4613 sctp_free_remote_addr(stcb->asoc.alternate); 4614 stcb->asoc.alternate = NULL; 4615 } 4616 /* TEMP CODE */ 4617 if (stcb->freed_from_where == 0) { 4618 /* Only record the first place free happened from */ 4619 stcb->freed_from_where = from_location; 4620 } 4621 /* TEMP CODE */ 4622 4623 asoc = &stcb->asoc; 4624 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4625 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4626 /* nothing around */ 4627 so = NULL; 4628 else 4629 so = inp->sctp_socket; 4630 4631 /* 4632 * We used timer based freeing if a reader or writer is in the way. 4633 * So we first check if we are actually being called from a timer, 4634 * if so we abort early if a reader or writer is still in the way. 4635 */ 4636 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4637 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4638 /* 4639 * is it the timer driving us? if so are the reader/writers 4640 * gone? 4641 */ 4642 if (stcb->asoc.refcnt) { 4643 /* nope, reader or writer in the way */ 4644 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4645 /* no asoc destroyed */ 4646 SCTP_TCB_UNLOCK(stcb); 4647 #ifdef SCTP_LOG_CLOSING 4648 sctp_log_closing(inp, stcb, 8); 4649 #endif 4650 return (0); 4651 } 4652 } 4653 /* now clean up any other timers */ 4654 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4655 asoc->dack_timer.self = NULL; 4656 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4657 /*- 4658 * For stream reset we don't blast this unless 4659 * it is a str-reset timer, it might be the 4660 * free-asoc timer which we DON'T want to 4661 * disturb. 4662 */ 4663 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4664 asoc->strreset_timer.self = NULL; 4665 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4666 asoc->asconf_timer.self = NULL; 4667 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4668 asoc->autoclose_timer.self = NULL; 4669 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4670 asoc->shut_guard_timer.self = NULL; 4671 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4672 asoc->delayed_event_timer.self = NULL; 4673 /* Mobility adaptation */ 4674 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4675 asoc->delete_prim_timer.self = NULL; 4676 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4677 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4678 net->rxt_timer.self = NULL; 4679 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4680 net->pmtu_timer.self = NULL; 4681 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4682 net->hb_timer.self = NULL; 4683 } 4684 /* Now the read queue needs to be cleaned up (only once) */ 4685 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4686 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4687 SCTP_INP_READ_LOCK(inp); 4688 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4689 if (sq->stcb == stcb) { 4690 sq->do_not_ref_stcb = 1; 4691 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4692 /* 4693 * If there is no end, there never will be 4694 * now. 4695 */ 4696 if (sq->end_added == 0) { 4697 /* Held for PD-API clear that. */ 4698 sq->pdapi_aborted = 1; 4699 sq->held_length = 0; 4700 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4701 /* 4702 * Need to add a PD-API 4703 * aborted indication. 4704 * Setting the control_pdapi 4705 * assures that it will be 4706 * added right after this 4707 * msg. 4708 */ 4709 uint32_t strseq; 4710 4711 stcb->asoc.control_pdapi = sq; 4712 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4713 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4714 stcb, 4715 SCTP_PARTIAL_DELIVERY_ABORTED, 4716 (void *)&strseq, 4717 SCTP_SO_LOCKED); 4718 stcb->asoc.control_pdapi = NULL; 4719 } 4720 } 4721 /* Add an end to wake them */ 4722 sq->end_added = 1; 4723 } 4724 } 4725 SCTP_INP_READ_UNLOCK(inp); 4726 if (stcb->block_entry) { 4727 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4728 stcb->block_entry->error = ECONNRESET; 4729 stcb->block_entry = NULL; 4730 } 4731 } 4732 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4733 /* 4734 * Someone holds a reference OR the socket is unaccepted 4735 * yet. 4736 */ 4737 if ((stcb->asoc.refcnt) || 4738 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4739 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4740 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4741 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4742 } 4743 SCTP_TCB_UNLOCK(stcb); 4744 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4745 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4746 /* nothing around */ 4747 so = NULL; 4748 if (so) { 4749 /* Wake any reader/writers */ 4750 sctp_sorwakeup(inp, so); 4751 sctp_sowwakeup(inp, so); 4752 } 4753 #ifdef SCTP_LOG_CLOSING 4754 sctp_log_closing(inp, stcb, 9); 4755 #endif 4756 /* no asoc destroyed */ 4757 return (0); 4758 } 4759 #ifdef SCTP_LOG_CLOSING 4760 sctp_log_closing(inp, stcb, 10); 4761 #endif 4762 /* 4763 * When I reach here, no others want to kill the assoc yet.. and I 4764 * own the lock. Now its possible an abort comes in when I do the 4765 * lock exchange below to grab all the locks to do the final take 4766 * out. to prevent this we increment the count, which will start a 4767 * timer and blow out above thus assuring us that we hold exclusive 4768 * killing of the asoc. Note that after getting back the TCB lock we 4769 * will go ahead and increment the counter back up and stop any 4770 * timer a passing stranger may have started :-S 4771 */ 4772 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4773 atomic_add_int(&stcb->asoc.refcnt, 1); 4774 4775 SCTP_TCB_UNLOCK(stcb); 4776 SCTP_INP_INFO_WLOCK(); 4777 SCTP_INP_WLOCK(inp); 4778 SCTP_TCB_LOCK(stcb); 4779 } 4780 /* Double check the GONE flag */ 4781 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4782 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4783 /* nothing around */ 4784 so = NULL; 4785 4786 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4787 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4788 /* 4789 * For TCP type we need special handling when we are 4790 * connected. We also include the peel'ed off ones to. 4791 */ 4792 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4793 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4794 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4795 if (so) { 4796 SOCK_LOCK(so); 4797 if (so->so_rcv.sb_cc == 0) { 4798 so->so_state &= ~(SS_ISCONNECTING | 4799 SS_ISDISCONNECTING | 4800 SS_ISCONFIRMING | 4801 SS_ISCONNECTED); 4802 } 4803 socantrcvmore_locked(so); 4804 sctp_sowwakeup(inp, so); 4805 sctp_sorwakeup(inp, so); 4806 SCTP_SOWAKEUP(so); 4807 } 4808 } 4809 } 4810 /* 4811 * Make it invalid too, that way if its about to run it will abort 4812 * and return. 4813 */ 4814 /* re-increment the lock */ 4815 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4816 atomic_add_int(&stcb->asoc.refcnt, -1); 4817 } 4818 if (stcb->asoc.refcnt) { 4819 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4820 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4821 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4822 SCTP_INP_INFO_WUNLOCK(); 4823 SCTP_INP_WUNLOCK(inp); 4824 } 4825 SCTP_TCB_UNLOCK(stcb); 4826 return (0); 4827 } 4828 asoc->state = 0; 4829 if (inp->sctp_tcbhash) { 4830 LIST_REMOVE(stcb, sctp_tcbhash); 4831 } 4832 if (stcb->asoc.in_asocid_hash) { 4833 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4834 } 4835 /* Now lets remove it from the list of ALL associations in the EP */ 4836 LIST_REMOVE(stcb, sctp_tcblist); 4837 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4838 SCTP_INP_INCR_REF(inp); 4839 SCTP_INP_WUNLOCK(inp); 4840 } 4841 /* pull from vtag hash */ 4842 LIST_REMOVE(stcb, sctp_asocs); 4843 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4844 inp->sctp_lport, stcb->rport); 4845 4846 /* 4847 * Now restop the timers to be sure this is paranoia at is finest! 4848 */ 4849 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4850 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4851 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4852 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4853 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4854 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4855 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4856 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4857 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4858 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4859 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4860 } 4861 4862 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4863 /* 4864 * The chunk lists and such SHOULD be empty but we check them just 4865 * in case. 4866 */ 4867 /* anything on the wheel needs to be removed */ 4868 for (i = 0; i < asoc->streamoutcnt; i++) { 4869 struct sctp_stream_out *outs; 4870 4871 outs = &asoc->strmout[i]; 4872 /* now clean up any chunks here */ 4873 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4874 TAILQ_REMOVE(&outs->outqueue, sp, next); 4875 sctp_free_spbufspace(stcb, asoc, sp); 4876 if (sp->data) { 4877 if (so) { 4878 /* Still an open socket - report */ 4879 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4880 0, (void *)sp, SCTP_SO_LOCKED); 4881 } 4882 if (sp->data) { 4883 sctp_m_freem(sp->data); 4884 sp->data = NULL; 4885 sp->tail_mbuf = NULL; 4886 sp->length = 0; 4887 } 4888 } 4889 if (sp->net) { 4890 sctp_free_remote_addr(sp->net); 4891 sp->net = NULL; 4892 } 4893 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4894 } 4895 } 4896 /* sa_ignore FREED_MEMORY */ 4897 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4898 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4899 SCTP_FREE(strrst, SCTP_M_STRESET); 4900 } 4901 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4902 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4903 if (sq->data) { 4904 sctp_m_freem(sq->data); 4905 sq->data = NULL; 4906 } 4907 sctp_free_remote_addr(sq->whoFrom); 4908 sq->whoFrom = NULL; 4909 sq->stcb = NULL; 4910 /* Free the ctl entry */ 4911 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4912 SCTP_DECR_READQ_COUNT(); 4913 /* sa_ignore FREED_MEMORY */ 4914 } 4915 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4916 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4917 if (chk->data) { 4918 sctp_m_freem(chk->data); 4919 chk->data = NULL; 4920 } 4921 if (chk->holds_key_ref) 4922 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4923 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4924 SCTP_DECR_CHK_COUNT(); 4925 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4926 asoc->free_chunk_cnt--; 4927 /* sa_ignore FREED_MEMORY */ 4928 } 4929 /* pending send queue SHOULD be empty */ 4930 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4931 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4932 if (chk->data) { 4933 if (so) { 4934 /* Still a socket? */ 4935 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4936 0, chk, SCTP_SO_LOCKED); 4937 } 4938 if (chk->data) { 4939 sctp_m_freem(chk->data); 4940 chk->data = NULL; 4941 } 4942 } 4943 if (chk->holds_key_ref) 4944 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4945 if (chk->whoTo) { 4946 sctp_free_remote_addr(chk->whoTo); 4947 chk->whoTo = NULL; 4948 } 4949 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4950 SCTP_DECR_CHK_COUNT(); 4951 /* sa_ignore FREED_MEMORY */ 4952 } 4953 /* sent queue SHOULD be empty */ 4954 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4955 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4956 if (chk->data) { 4957 if (so) { 4958 /* Still a socket? */ 4959 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 4960 0, chk, SCTP_SO_LOCKED); 4961 } 4962 if (chk->data) { 4963 sctp_m_freem(chk->data); 4964 chk->data = NULL; 4965 } 4966 } 4967 if (chk->holds_key_ref) 4968 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4969 sctp_free_remote_addr(chk->whoTo); 4970 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4971 SCTP_DECR_CHK_COUNT(); 4972 /* sa_ignore FREED_MEMORY */ 4973 } 4974 /* control queue MAY not be empty */ 4975 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 4976 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4977 if (chk->data) { 4978 sctp_m_freem(chk->data); 4979 chk->data = NULL; 4980 } 4981 if (chk->holds_key_ref) 4982 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4983 sctp_free_remote_addr(chk->whoTo); 4984 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4985 SCTP_DECR_CHK_COUNT(); 4986 /* sa_ignore FREED_MEMORY */ 4987 } 4988 /* ASCONF queue MAY not be empty */ 4989 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 4990 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4991 if (chk->data) { 4992 sctp_m_freem(chk->data); 4993 chk->data = NULL; 4994 } 4995 if (chk->holds_key_ref) 4996 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4997 sctp_free_remote_addr(chk->whoTo); 4998 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4999 SCTP_DECR_CHK_COUNT(); 5000 /* sa_ignore FREED_MEMORY */ 5001 } 5002 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5003 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5004 if (chk->data) { 5005 sctp_m_freem(chk->data); 5006 chk->data = NULL; 5007 } 5008 if (chk->holds_key_ref) 5009 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5010 sctp_free_remote_addr(chk->whoTo); 5011 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5012 SCTP_DECR_CHK_COUNT(); 5013 /* sa_ignore FREED_MEMORY */ 5014 } 5015 5016 if (asoc->mapping_array) { 5017 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5018 asoc->mapping_array = NULL; 5019 } 5020 if (asoc->nr_mapping_array) { 5021 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5022 asoc->nr_mapping_array = NULL; 5023 } 5024 /* the stream outs */ 5025 if (asoc->strmout) { 5026 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5027 asoc->strmout = NULL; 5028 } 5029 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5030 if (asoc->strmin) { 5031 struct sctp_queued_to_read *ctl, *nctl; 5032 5033 for (i = 0; i < asoc->streamincnt; i++) { 5034 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5035 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5036 sctp_free_remote_addr(ctl->whoFrom); 5037 if (ctl->data) { 5038 sctp_m_freem(ctl->data); 5039 ctl->data = NULL; 5040 } 5041 /* 5042 * We don't free the address here since all 5043 * the net's were freed above. 5044 */ 5045 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5046 SCTP_DECR_READQ_COUNT(); 5047 } 5048 } 5049 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5050 asoc->strmin = NULL; 5051 } 5052 asoc->streamincnt = 0; 5053 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5054 #ifdef INVARIANTS 5055 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5056 panic("no net's left alloc'ed, or list points to itself"); 5057 } 5058 #endif 5059 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5060 sctp_free_remote_addr(net); 5061 } 5062 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5063 /* sa_ignore FREED_MEMORY */ 5064 sctp_remove_laddr(laddr); 5065 } 5066 5067 /* pending asconf (address) parameters */ 5068 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5069 /* sa_ignore FREED_MEMORY */ 5070 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5071 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5072 } 5073 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5074 /* sa_ignore FREED_MEMORY */ 5075 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5076 if (aack->data != NULL) { 5077 sctp_m_freem(aack->data); 5078 } 5079 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5080 } 5081 /* clean up auth stuff */ 5082 if (asoc->local_hmacs) 5083 sctp_free_hmaclist(asoc->local_hmacs); 5084 if (asoc->peer_hmacs) 5085 sctp_free_hmaclist(asoc->peer_hmacs); 5086 5087 if (asoc->local_auth_chunks) 5088 sctp_free_chunklist(asoc->local_auth_chunks); 5089 if (asoc->peer_auth_chunks) 5090 sctp_free_chunklist(asoc->peer_auth_chunks); 5091 5092 sctp_free_authinfo(&asoc->authinfo); 5093 5094 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5095 LIST_REMOVE(shared_key, next); 5096 sctp_free_sharedkey(shared_key); 5097 /* sa_ignore FREED_MEMORY */ 5098 } 5099 5100 /* Insert new items here :> */ 5101 5102 /* Get rid of LOCK */ 5103 SCTP_TCB_LOCK_DESTROY(stcb); 5104 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5105 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5106 SCTP_INP_INFO_WUNLOCK(); 5107 SCTP_INP_RLOCK(inp); 5108 } 5109 #ifdef SCTP_TRACK_FREED_ASOCS 5110 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5111 /* now clean up the tasoc itself */ 5112 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5113 SCTP_DECR_ASOC_COUNT(); 5114 } else { 5115 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5116 } 5117 #else 5118 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5119 SCTP_DECR_ASOC_COUNT(); 5120 #endif 5121 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5122 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5123 /* 5124 * If its NOT the inp_free calling us AND sctp_close 5125 * as been called, we call back... 5126 */ 5127 SCTP_INP_RUNLOCK(inp); 5128 /* 5129 * This will start the kill timer (if we are the 5130 * last one) since we hold an increment yet. But 5131 * this is the only safe way to do this since 5132 * otherwise if the socket closes at the same time 5133 * we are here we might collide in the cleanup. 5134 */ 5135 sctp_inpcb_free(inp, 5136 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5137 SCTP_CALLED_DIRECTLY_NOCMPSET); 5138 SCTP_INP_DECR_REF(inp); 5139 goto out_of; 5140 } else { 5141 /* The socket is still open. */ 5142 SCTP_INP_DECR_REF(inp); 5143 } 5144 } 5145 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5146 SCTP_INP_RUNLOCK(inp); 5147 } 5148 out_of: 5149 /* destroyed the asoc */ 5150 #ifdef SCTP_LOG_CLOSING 5151 sctp_log_closing(inp, NULL, 11); 5152 #endif 5153 return (1); 5154 } 5155 5156 5157 5158 /* 5159 * determine if a destination is "reachable" based upon the addresses bound 5160 * to the current endpoint (e.g. only v4 or v6 currently bound) 5161 */ 5162 /* 5163 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5164 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5165 * types bound as its endpoint 5166 */ 5167 int 5168 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5169 { 5170 struct sctp_inpcb *inp; 5171 int answer; 5172 5173 /* 5174 * No locks here, the TCB, in all cases is already locked and an 5175 * assoc is up. There is either a INP lock by the caller applied (in 5176 * asconf case when deleting an address) or NOT in the HB case, 5177 * however if HB then the INP increment is up and the INP will not 5178 * be removed (on top of the fact that we have a TCB lock). So we 5179 * only want to read the sctp_flags, which is either bound-all or 5180 * not.. no protection needed since once an assoc is up you can't be 5181 * changing your binding. 5182 */ 5183 inp = stcb->sctp_ep; 5184 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5185 /* if bound all, destination is not restricted */ 5186 /* 5187 * RRS: Question during lock work: Is this correct? If you 5188 * are bound-all you still might need to obey the V4--V6 5189 * flags??? IMO this bound-all stuff needs to be removed! 5190 */ 5191 return (1); 5192 } 5193 /* NOTE: all "scope" checks are done when local addresses are added */ 5194 switch (destaddr->sa_family) { 5195 #ifdef INET6 5196 case AF_INET6: 5197 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5198 break; 5199 #endif 5200 #ifdef INET 5201 case AF_INET: 5202 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5203 break; 5204 #endif 5205 default: 5206 /* invalid family, so it's unreachable */ 5207 answer = 0; 5208 break; 5209 } 5210 return (answer); 5211 } 5212 5213 /* 5214 * update the inp_vflags on an endpoint 5215 */ 5216 static void 5217 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5218 { 5219 struct sctp_laddr *laddr; 5220 5221 /* first clear the flag */ 5222 inp->ip_inp.inp.inp_vflag = 0; 5223 /* set the flag based on addresses on the ep list */ 5224 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5225 if (laddr->ifa == NULL) { 5226 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5227 __FUNCTION__); 5228 continue; 5229 } 5230 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5231 continue; 5232 } 5233 switch (laddr->ifa->address.sa.sa_family) { 5234 #ifdef INET6 5235 case AF_INET6: 5236 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5237 break; 5238 #endif 5239 #ifdef INET 5240 case AF_INET: 5241 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5242 break; 5243 #endif 5244 default: 5245 break; 5246 } 5247 } 5248 } 5249 5250 /* 5251 * Add the address to the endpoint local address list There is nothing to be 5252 * done if we are bound to all addresses 5253 */ 5254 void 5255 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5256 { 5257 struct sctp_laddr *laddr; 5258 int fnd, error = 0; 5259 5260 fnd = 0; 5261 5262 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5263 /* You are already bound to all. You have it already */ 5264 return; 5265 } 5266 #ifdef INET6 5267 if (ifa->address.sa.sa_family == AF_INET6) { 5268 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5269 /* Can't bind a non-useable addr. */ 5270 return; 5271 } 5272 } 5273 #endif 5274 /* first, is it already present? */ 5275 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5276 if (laddr->ifa == ifa) { 5277 fnd = 1; 5278 break; 5279 } 5280 } 5281 5282 if (fnd == 0) { 5283 /* Not in the ep list */ 5284 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5285 if (error != 0) 5286 return; 5287 inp->laddr_count++; 5288 /* update inp_vflag flags */ 5289 switch (ifa->address.sa.sa_family) { 5290 #ifdef INET6 5291 case AF_INET6: 5292 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5293 break; 5294 #endif 5295 #ifdef INET 5296 case AF_INET: 5297 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5298 break; 5299 #endif 5300 default: 5301 break; 5302 } 5303 } 5304 return; 5305 } 5306 5307 5308 /* 5309 * select a new (hopefully reachable) destination net (should only be used 5310 * when we deleted an ep addr that is the only usable source address to reach 5311 * the destination net) 5312 */ 5313 static void 5314 sctp_select_primary_destination(struct sctp_tcb *stcb) 5315 { 5316 struct sctp_nets *net; 5317 5318 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5319 /* for now, we'll just pick the first reachable one we find */ 5320 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5321 continue; 5322 if (sctp_destination_is_reachable(stcb, 5323 (struct sockaddr *)&net->ro._l_addr)) { 5324 /* found a reachable destination */ 5325 stcb->asoc.primary_destination = net; 5326 } 5327 } 5328 /* I can't there from here! ...we're gonna die shortly... */ 5329 } 5330 5331 5332 /* 5333 * Delete the address from the endpoint local address list There is nothing 5334 * to be done if we are bound to all addresses 5335 */ 5336 void 5337 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5338 { 5339 struct sctp_laddr *laddr; 5340 int fnd; 5341 5342 fnd = 0; 5343 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5344 /* You are already bound to all. You have it already */ 5345 return; 5346 } 5347 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5348 if (laddr->ifa == ifa) { 5349 fnd = 1; 5350 break; 5351 } 5352 } 5353 if (fnd && (inp->laddr_count < 2)) { 5354 /* can't delete unless there are at LEAST 2 addresses */ 5355 return; 5356 } 5357 if (fnd) { 5358 /* 5359 * clean up any use of this address go through our 5360 * associations and clear any last_used_address that match 5361 * this one for each assoc, see if a new primary_destination 5362 * is needed 5363 */ 5364 struct sctp_tcb *stcb; 5365 5366 /* clean up "next_addr_touse" */ 5367 if (inp->next_addr_touse == laddr) 5368 /* delete this address */ 5369 inp->next_addr_touse = NULL; 5370 5371 /* clean up "last_used_address" */ 5372 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5373 struct sctp_nets *net; 5374 5375 SCTP_TCB_LOCK(stcb); 5376 if (stcb->asoc.last_used_address == laddr) 5377 /* delete this address */ 5378 stcb->asoc.last_used_address = NULL; 5379 /* 5380 * Now spin through all the nets and purge any ref 5381 * to laddr 5382 */ 5383 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5384 if (net->ro._s_addr && 5385 (net->ro._s_addr->ifa == laddr->ifa)) { 5386 /* Yep, purge src address selected */ 5387 sctp_rtentry_t *rt; 5388 5389 /* delete this address if cached */ 5390 rt = net->ro.ro_rt; 5391 if (rt != NULL) { 5392 RTFREE(rt); 5393 net->ro.ro_rt = NULL; 5394 } 5395 sctp_free_ifa(net->ro._s_addr); 5396 net->ro._s_addr = NULL; 5397 net->src_addr_selected = 0; 5398 } 5399 } 5400 SCTP_TCB_UNLOCK(stcb); 5401 } /* for each tcb */ 5402 /* remove it from the ep list */ 5403 sctp_remove_laddr(laddr); 5404 inp->laddr_count--; 5405 /* update inp_vflag flags */ 5406 sctp_update_ep_vflag(inp); 5407 } 5408 return; 5409 } 5410 5411 /* 5412 * Add the address to the TCB local address restricted list. 5413 * This is a "pending" address list (eg. addresses waiting for an 5414 * ASCONF-ACK response) and cannot be used as a valid source address. 5415 */ 5416 void 5417 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5418 { 5419 struct sctp_laddr *laddr; 5420 struct sctpladdr *list; 5421 5422 /* 5423 * Assumes TCB is locked.. and possibly the INP. May need to 5424 * confirm/fix that if we need it and is not the case. 5425 */ 5426 list = &stcb->asoc.sctp_restricted_addrs; 5427 5428 #ifdef INET6 5429 if (ifa->address.sa.sa_family == AF_INET6) { 5430 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5431 /* Can't bind a non-existent addr. */ 5432 return; 5433 } 5434 } 5435 #endif 5436 /* does the address already exist? */ 5437 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5438 if (laddr->ifa == ifa) { 5439 return; 5440 } 5441 } 5442 5443 /* add to the list */ 5444 (void)sctp_insert_laddr(list, ifa, 0); 5445 return; 5446 } 5447 5448 /* 5449 * insert an laddr entry with the given ifa for the desired list 5450 */ 5451 int 5452 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5453 { 5454 struct sctp_laddr *laddr; 5455 5456 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5457 if (laddr == NULL) { 5458 /* out of memory? */ 5459 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5460 return (EINVAL); 5461 } 5462 SCTP_INCR_LADDR_COUNT(); 5463 bzero(laddr, sizeof(*laddr)); 5464 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5465 laddr->ifa = ifa; 5466 laddr->action = act; 5467 atomic_add_int(&ifa->refcount, 1); 5468 /* insert it */ 5469 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5470 5471 return (0); 5472 } 5473 5474 /* 5475 * Remove an laddr entry from the local address list (on an assoc) 5476 */ 5477 void 5478 sctp_remove_laddr(struct sctp_laddr *laddr) 5479 { 5480 5481 /* remove from the list */ 5482 LIST_REMOVE(laddr, sctp_nxt_addr); 5483 sctp_free_ifa(laddr->ifa); 5484 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5485 SCTP_DECR_LADDR_COUNT(); 5486 } 5487 5488 /* 5489 * Remove a local address from the TCB local address restricted list 5490 */ 5491 void 5492 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5493 { 5494 struct sctp_inpcb *inp; 5495 struct sctp_laddr *laddr; 5496 5497 /* 5498 * This is called by asconf work. It is assumed that a) The TCB is 5499 * locked and b) The INP is locked. This is true in as much as I can 5500 * trace through the entry asconf code where I did these locks. 5501 * Again, the ASCONF code is a bit different in that it does lock 5502 * the INP during its work often times. This must be since we don't 5503 * want other proc's looking up things while what they are looking 5504 * up is changing :-D 5505 */ 5506 5507 inp = stcb->sctp_ep; 5508 /* if subset bound and don't allow ASCONF's, can't delete last */ 5509 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5510 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5511 if (stcb->sctp_ep->laddr_count < 2) { 5512 /* can't delete last address */ 5513 return; 5514 } 5515 } 5516 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5517 /* remove the address if it exists */ 5518 if (laddr->ifa == NULL) 5519 continue; 5520 if (laddr->ifa == ifa) { 5521 sctp_remove_laddr(laddr); 5522 return; 5523 } 5524 } 5525 5526 /* address not found! */ 5527 return; 5528 } 5529 5530 /* 5531 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5532 */ 5533 /* sysctl */ 5534 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5535 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5536 5537 5538 5539 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5540 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5541 int *sctp_cpuarry = NULL; 5542 void 5543 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5544 { 5545 /* Queue a packet to a processor for the specified core */ 5546 struct sctp_mcore_queue *qent; 5547 struct sctp_mcore_ctrl *wkq; 5548 int need_wake = 0; 5549 5550 if (sctp_mcore_workers == NULL) { 5551 /* Something went way bad during setup */ 5552 sctp_input_with_port(m, off, 0); 5553 return; 5554 } 5555 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5556 (sizeof(struct sctp_mcore_queue)), 5557 SCTP_M_MCORE); 5558 if (qent == NULL) { 5559 /* This is trouble */ 5560 sctp_input_with_port(m, off, 0); 5561 return; 5562 } 5563 qent->vn = curvnet; 5564 qent->m = m; 5565 qent->off = off; 5566 qent->v6 = 0; 5567 wkq = &sctp_mcore_workers[cpu_to_use]; 5568 SCTP_MCORE_QLOCK(wkq); 5569 5570 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5571 if (wkq->running == 0) { 5572 need_wake = 1; 5573 } 5574 SCTP_MCORE_QUNLOCK(wkq); 5575 if (need_wake) { 5576 wakeup(&wkq->running); 5577 } 5578 } 5579 5580 static void 5581 sctp_mcore_thread(void *arg) 5582 { 5583 5584 struct sctp_mcore_ctrl *wkq; 5585 struct sctp_mcore_queue *qent; 5586 5587 wkq = (struct sctp_mcore_ctrl *)arg; 5588 struct mbuf *m; 5589 int off, v6; 5590 5591 /* Wait for first tickle */ 5592 SCTP_MCORE_LOCK(wkq); 5593 wkq->running = 0; 5594 msleep(&wkq->running, 5595 &wkq->core_mtx, 5596 0, "wait for pkt", 0); 5597 SCTP_MCORE_UNLOCK(wkq); 5598 5599 /* Bind to our cpu */ 5600 thread_lock(curthread); 5601 sched_bind(curthread, wkq->cpuid); 5602 thread_unlock(curthread); 5603 5604 /* Now lets start working */ 5605 SCTP_MCORE_LOCK(wkq); 5606 /* Now grab lock and go */ 5607 for (;;) { 5608 SCTP_MCORE_QLOCK(wkq); 5609 skip_sleep: 5610 wkq->running = 1; 5611 qent = TAILQ_FIRST(&wkq->que); 5612 if (qent) { 5613 TAILQ_REMOVE(&wkq->que, qent, next); 5614 SCTP_MCORE_QUNLOCK(wkq); 5615 CURVNET_SET(qent->vn); 5616 m = qent->m; 5617 off = qent->off; 5618 v6 = qent->v6; 5619 SCTP_FREE(qent, SCTP_M_MCORE); 5620 if (v6 == 0) { 5621 sctp_input_with_port(m, off, 0); 5622 } else { 5623 SCTP_PRINTF("V6 not yet supported\n"); 5624 sctp_m_freem(m); 5625 } 5626 CURVNET_RESTORE(); 5627 SCTP_MCORE_QLOCK(wkq); 5628 } 5629 wkq->running = 0; 5630 if (!TAILQ_EMPTY(&wkq->que)) { 5631 goto skip_sleep; 5632 } 5633 SCTP_MCORE_QUNLOCK(wkq); 5634 msleep(&wkq->running, 5635 &wkq->core_mtx, 5636 0, "wait for pkt", 0); 5637 } 5638 } 5639 5640 static void 5641 sctp_startup_mcore_threads(void) 5642 { 5643 int i, cpu; 5644 5645 if (mp_ncpus == 1) 5646 return; 5647 5648 if (sctp_mcore_workers != NULL) { 5649 /* 5650 * Already been here in some previous vnet? 5651 */ 5652 return; 5653 } 5654 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5655 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5656 SCTP_M_MCORE); 5657 if (sctp_mcore_workers == NULL) { 5658 /* TSNH I hope */ 5659 return; 5660 } 5661 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5662 sizeof(struct sctp_mcore_ctrl))); 5663 /* Init the structures */ 5664 for (i = 0; i <= mp_maxid; i++) { 5665 TAILQ_INIT(&sctp_mcore_workers[i].que); 5666 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5667 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5668 sctp_mcore_workers[i].cpuid = i; 5669 } 5670 if (sctp_cpuarry == NULL) { 5671 SCTP_MALLOC(sctp_cpuarry, int *, 5672 (mp_ncpus * sizeof(int)), 5673 SCTP_M_MCORE); 5674 i = 0; 5675 CPU_FOREACH(cpu) { 5676 sctp_cpuarry[i] = cpu; 5677 i++; 5678 } 5679 } 5680 /* Now start them all */ 5681 CPU_FOREACH(cpu) { 5682 (void)kproc_create(sctp_mcore_thread, 5683 (void *)&sctp_mcore_workers[cpu], 5684 &sctp_mcore_workers[cpu].thread_proc, 5685 RFPROC, 5686 SCTP_KTHREAD_PAGES, 5687 SCTP_MCORE_NAME); 5688 5689 } 5690 } 5691 5692 #endif 5693 5694 void 5695 sctp_pcb_init() 5696 { 5697 /* 5698 * SCTP initialization for the PCB structures should be called by 5699 * the sctp_init() funciton. 5700 */ 5701 int i; 5702 struct timeval tv; 5703 5704 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5705 /* error I was called twice */ 5706 return; 5707 } 5708 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5709 5710 #if defined(SCTP_LOCAL_TRACE_BUF) 5711 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5712 #endif 5713 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5714 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5715 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5716 SCTP_M_MCORE); 5717 #endif 5718 (void)SCTP_GETTIME_TIMEVAL(&tv); 5719 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5720 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5721 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5722 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5723 #else 5724 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5725 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5726 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5727 #endif 5728 /* init the empty list of (All) Endpoints */ 5729 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5730 5731 5732 /* init the hash table of endpoints */ 5733 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5734 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5735 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5736 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5737 &SCTP_BASE_INFO(hashasocmark)); 5738 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5739 &SCTP_BASE_INFO(hashmark)); 5740 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5741 &SCTP_BASE_INFO(hashtcpmark)); 5742 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5743 5744 5745 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5746 &SCTP_BASE_INFO(hashvrfmark)); 5747 5748 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5749 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5750 /* init the zones */ 5751 /* 5752 * FIX ME: Should check for NULL returns, but if it does fail we are 5753 * doomed to panic anyways... add later maybe. 5754 */ 5755 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5756 sizeof(struct sctp_inpcb), maxsockets); 5757 5758 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5759 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5760 5761 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5762 sizeof(struct sctp_laddr), 5763 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5764 5765 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5766 sizeof(struct sctp_nets), 5767 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5768 5769 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5770 sizeof(struct sctp_tmit_chunk), 5771 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5772 5773 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5774 sizeof(struct sctp_queued_to_read), 5775 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5776 5777 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5778 sizeof(struct sctp_stream_queue_pending), 5779 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5780 5781 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5782 sizeof(struct sctp_asconf), 5783 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5784 5785 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5786 sizeof(struct sctp_asconf_ack), 5787 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5788 5789 5790 /* Master Lock INIT for info structure */ 5791 SCTP_INP_INFO_LOCK_INIT(); 5792 SCTP_STATLOG_INIT_LOCK(); 5793 5794 SCTP_IPI_COUNT_INIT(); 5795 SCTP_IPI_ADDR_INIT(); 5796 #ifdef SCTP_PACKET_LOGGING 5797 SCTP_IP_PKTLOG_INIT(); 5798 #endif 5799 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5800 5801 SCTP_WQ_ADDR_INIT(); 5802 /* not sure if we need all the counts */ 5803 SCTP_BASE_INFO(ipi_count_ep) = 0; 5804 /* assoc/tcb zone info */ 5805 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5806 /* local addrlist zone info */ 5807 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5808 /* remote addrlist zone info */ 5809 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5810 /* chunk info */ 5811 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5812 5813 /* socket queue zone info */ 5814 SCTP_BASE_INFO(ipi_count_readq) = 0; 5815 5816 /* stream out queue cont */ 5817 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5818 5819 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5820 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5821 5822 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5823 5824 /* Init the TIMEWAIT list */ 5825 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5826 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5827 } 5828 5829 sctp_startup_iterator(); 5830 5831 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5832 sctp_startup_mcore_threads(); 5833 #endif 5834 5835 /* 5836 * INIT the default VRF which for BSD is the only one, other O/S's 5837 * may have more. But initially they must start with one and then 5838 * add the VRF's as addresses are added. 5839 */ 5840 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5841 } 5842 5843 /* 5844 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5845 */ 5846 void 5847 sctp_pcb_finish(void) 5848 { 5849 struct sctp_vrflist *vrf_bucket; 5850 struct sctp_vrf *vrf, *nvrf; 5851 struct sctp_ifn *ifn, *nifn; 5852 struct sctp_ifa *ifa, *nifa; 5853 struct sctpvtaghead *chain; 5854 struct sctp_tagblock *twait_block, *prev_twait_block; 5855 struct sctp_laddr *wi, *nwi; 5856 int i; 5857 5858 /* 5859 * Free BSD the it thread never exits but we do clean up. The only 5860 * way freebsd reaches here if we have VRF's but we still add the 5861 * ifdef to make it compile on old versions. 5862 */ 5863 { 5864 struct sctp_iterator *it, *nit; 5865 5866 SCTP_IPI_ITERATOR_WQ_LOCK(); 5867 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5868 if (it->vn != curvnet) { 5869 continue; 5870 } 5871 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5872 if (it->function_atend != NULL) { 5873 (*it->function_atend) (it->pointer, it->val); 5874 } 5875 SCTP_FREE(it, SCTP_M_ITER); 5876 } 5877 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5878 SCTP_ITERATOR_LOCK(); 5879 if ((sctp_it_ctl.cur_it) && 5880 (sctp_it_ctl.cur_it->vn == curvnet)) { 5881 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5882 } 5883 SCTP_ITERATOR_UNLOCK(); 5884 } 5885 5886 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5887 SCTP_WQ_ADDR_LOCK(); 5888 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5889 LIST_REMOVE(wi, sctp_nxt_addr); 5890 SCTP_DECR_LADDR_COUNT(); 5891 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5892 } 5893 SCTP_WQ_ADDR_UNLOCK(); 5894 5895 /* 5896 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5897 * destroyed first). 5898 */ 5899 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5900 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5901 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5902 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5903 /* free the ifa */ 5904 LIST_REMOVE(ifa, next_bucket); 5905 LIST_REMOVE(ifa, next_ifa); 5906 SCTP_FREE(ifa, SCTP_M_IFA); 5907 } 5908 /* free the ifn */ 5909 LIST_REMOVE(ifn, next_bucket); 5910 LIST_REMOVE(ifn, next_ifn); 5911 SCTP_FREE(ifn, SCTP_M_IFN); 5912 } 5913 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5914 /* free the vrf */ 5915 LIST_REMOVE(vrf, next_vrf); 5916 SCTP_FREE(vrf, SCTP_M_VRF); 5917 } 5918 /* free the vrf hashes */ 5919 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5920 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5921 5922 /* 5923 * free the TIMEWAIT list elements malloc'd in the function 5924 * sctp_add_vtag_to_timewait()... 5925 */ 5926 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5927 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5928 if (!LIST_EMPTY(chain)) { 5929 prev_twait_block = NULL; 5930 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5931 if (prev_twait_block) { 5932 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5933 } 5934 prev_twait_block = twait_block; 5935 } 5936 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5937 } 5938 } 5939 5940 /* free the locks and mutexes */ 5941 #ifdef SCTP_PACKET_LOGGING 5942 SCTP_IP_PKTLOG_DESTROY(); 5943 #endif 5944 SCTP_IPI_ADDR_DESTROY(); 5945 SCTP_STATLOG_DESTROY(); 5946 SCTP_INP_INFO_LOCK_DESTROY(); 5947 5948 SCTP_WQ_ADDR_DESTROY(); 5949 5950 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5951 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5952 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5953 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5954 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5955 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5956 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5957 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5958 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5959 /* Get rid of other stuff to */ 5960 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5961 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5962 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5963 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5964 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5965 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5966 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5967 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5968 #endif 5969 } 5970 5971 5972 int 5973 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5974 int offset, int limit, 5975 struct sockaddr *src, struct sockaddr *dst, 5976 struct sockaddr *altsa) 5977 { 5978 /* 5979 * grub through the INIT pulling addresses and loading them to the 5980 * nets structure in the asoc. The from address in the mbuf should 5981 * also be loaded (if it is not already). This routine can be called 5982 * with either INIT or INIT-ACK's as long as the m points to the IP 5983 * packet and the offset points to the beginning of the parameters. 5984 */ 5985 struct sctp_inpcb *inp; 5986 struct sctp_nets *net, *nnet, *net_tmp; 5987 struct sctp_paramhdr *phdr, parm_buf; 5988 struct sctp_tcb *stcb_tmp; 5989 uint16_t ptype, plen; 5990 struct sockaddr *sa; 5991 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5992 struct sctp_auth_random *p_random = NULL; 5993 uint16_t random_len = 0; 5994 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5995 struct sctp_auth_hmac_algo *hmacs = NULL; 5996 uint16_t hmacs_len = 0; 5997 uint8_t saw_asconf = 0; 5998 uint8_t saw_asconf_ack = 0; 5999 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6000 struct sctp_auth_chunk_list *chunks = NULL; 6001 uint16_t num_chunks = 0; 6002 sctp_key_t *new_key; 6003 uint32_t keylen; 6004 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6005 uint8_t ecn_allowed; 6006 6007 #ifdef INET 6008 struct sockaddr_in sin; 6009 6010 #endif 6011 #ifdef INET6 6012 struct sockaddr_in6 sin6; 6013 6014 #endif 6015 6016 /* First get the destination address setup too. */ 6017 #ifdef INET 6018 memset(&sin, 0, sizeof(sin)); 6019 sin.sin_family = AF_INET; 6020 sin.sin_len = sizeof(sin); 6021 sin.sin_port = stcb->rport; 6022 #endif 6023 #ifdef INET6 6024 memset(&sin6, 0, sizeof(sin6)); 6025 sin6.sin6_family = AF_INET6; 6026 sin6.sin6_len = sizeof(struct sockaddr_in6); 6027 sin6.sin6_port = stcb->rport; 6028 #endif 6029 if (altsa) { 6030 sa = altsa; 6031 } else { 6032 sa = src; 6033 } 6034 /* Turn off ECN until we get through all params */ 6035 ecn_allowed = 0; 6036 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6037 /* mark all addresses that we have currently on the list */ 6038 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6039 } 6040 /* does the source address already exist? if so skip it */ 6041 inp = stcb->sctp_ep; 6042 atomic_add_int(&stcb->asoc.refcnt, 1); 6043 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6044 atomic_add_int(&stcb->asoc.refcnt, -1); 6045 6046 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6047 /* we must add the source address */ 6048 /* no scope set here since we have a tcb already. */ 6049 switch (sa->sa_family) { 6050 #ifdef INET 6051 case AF_INET: 6052 if (stcb->asoc.ipv4_addr_legal) { 6053 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6054 return (-1); 6055 } 6056 } 6057 break; 6058 #endif 6059 #ifdef INET6 6060 case AF_INET6: 6061 if (stcb->asoc.ipv6_addr_legal) { 6062 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6063 return (-2); 6064 } 6065 } 6066 break; 6067 #endif 6068 default: 6069 break; 6070 } 6071 } else { 6072 if (net_tmp != NULL && stcb_tmp == stcb) { 6073 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6074 } else if (stcb_tmp != stcb) { 6075 /* It belongs to another association? */ 6076 if (stcb_tmp) 6077 SCTP_TCB_UNLOCK(stcb_tmp); 6078 return (-3); 6079 } 6080 } 6081 if (stcb->asoc.state == 0) { 6082 /* the assoc was freed? */ 6083 return (-4); 6084 } 6085 /* 6086 * peer must explicitly turn this on. This may have been initialized 6087 * to be "on" in order to allow local addr changes while INIT's are 6088 * in flight. 6089 */ 6090 stcb->asoc.peer_supports_asconf = 0; 6091 /* now we must go through each of the params. */ 6092 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6093 while (phdr) { 6094 ptype = ntohs(phdr->param_type); 6095 plen = ntohs(phdr->param_length); 6096 /* 6097 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6098 * (uint32_t)ptype, (int)plen); 6099 */ 6100 if (offset + plen > limit) { 6101 break; 6102 } 6103 if (plen == 0) { 6104 break; 6105 } 6106 #ifdef INET 6107 if (ptype == SCTP_IPV4_ADDRESS) { 6108 if (stcb->asoc.ipv4_addr_legal) { 6109 struct sctp_ipv4addr_param *p4, p4_buf; 6110 6111 /* ok get the v4 address and check/add */ 6112 phdr = sctp_get_next_param(m, offset, 6113 (struct sctp_paramhdr *)&p4_buf, 6114 sizeof(p4_buf)); 6115 if (plen != sizeof(struct sctp_ipv4addr_param) || 6116 phdr == NULL) { 6117 return (-5); 6118 } 6119 p4 = (struct sctp_ipv4addr_param *)phdr; 6120 sin.sin_addr.s_addr = p4->addr; 6121 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6122 /* Skip multi-cast addresses */ 6123 goto next_param; 6124 } 6125 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6126 (sin.sin_addr.s_addr == INADDR_ANY)) { 6127 goto next_param; 6128 } 6129 sa = (struct sockaddr *)&sin; 6130 inp = stcb->sctp_ep; 6131 atomic_add_int(&stcb->asoc.refcnt, 1); 6132 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6133 dst, stcb); 6134 atomic_add_int(&stcb->asoc.refcnt, -1); 6135 6136 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6137 inp == NULL) { 6138 /* we must add the source address */ 6139 /* 6140 * no scope set since we have a tcb 6141 * already 6142 */ 6143 6144 /* 6145 * we must validate the state again 6146 * here 6147 */ 6148 add_it_now: 6149 if (stcb->asoc.state == 0) { 6150 /* the assoc was freed? */ 6151 return (-7); 6152 } 6153 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6154 return (-8); 6155 } 6156 } else if (stcb_tmp == stcb) { 6157 if (stcb->asoc.state == 0) { 6158 /* the assoc was freed? */ 6159 return (-10); 6160 } 6161 if (net != NULL) { 6162 /* clear flag */ 6163 net->dest_state &= 6164 ~SCTP_ADDR_NOT_IN_ASSOC; 6165 } 6166 } else { 6167 /* 6168 * strange, address is in another 6169 * assoc? straighten out locks. 6170 */ 6171 if (stcb_tmp) { 6172 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6173 /* 6174 * in setup state we 6175 * abort this guy 6176 */ 6177 sctp_abort_an_association(stcb_tmp->sctp_ep, 6178 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6179 goto add_it_now; 6180 } 6181 SCTP_TCB_UNLOCK(stcb_tmp); 6182 } 6183 if (stcb->asoc.state == 0) { 6184 /* the assoc was freed? */ 6185 return (-12); 6186 } 6187 return (-13); 6188 } 6189 } 6190 } else 6191 #endif 6192 #ifdef INET6 6193 if (ptype == SCTP_IPV6_ADDRESS) { 6194 if (stcb->asoc.ipv6_addr_legal) { 6195 /* ok get the v6 address and check/add */ 6196 struct sctp_ipv6addr_param *p6, p6_buf; 6197 6198 phdr = sctp_get_next_param(m, offset, 6199 (struct sctp_paramhdr *)&p6_buf, 6200 sizeof(p6_buf)); 6201 if (plen != sizeof(struct sctp_ipv6addr_param) || 6202 phdr == NULL) { 6203 return (-14); 6204 } 6205 p6 = (struct sctp_ipv6addr_param *)phdr; 6206 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6207 sizeof(p6->addr)); 6208 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6209 /* Skip multi-cast addresses */ 6210 goto next_param; 6211 } 6212 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6213 /* 6214 * Link local make no sense without 6215 * scope 6216 */ 6217 goto next_param; 6218 } 6219 sa = (struct sockaddr *)&sin6; 6220 inp = stcb->sctp_ep; 6221 atomic_add_int(&stcb->asoc.refcnt, 1); 6222 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6223 dst, stcb); 6224 atomic_add_int(&stcb->asoc.refcnt, -1); 6225 if (stcb_tmp == NULL && 6226 (inp == stcb->sctp_ep || inp == NULL)) { 6227 /* 6228 * we must validate the state again 6229 * here 6230 */ 6231 add_it_now6: 6232 if (stcb->asoc.state == 0) { 6233 /* the assoc was freed? */ 6234 return (-16); 6235 } 6236 /* 6237 * we must add the address, no scope 6238 * set 6239 */ 6240 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6241 return (-17); 6242 } 6243 } else if (stcb_tmp == stcb) { 6244 /* 6245 * we must validate the state again 6246 * here 6247 */ 6248 if (stcb->asoc.state == 0) { 6249 /* the assoc was freed? */ 6250 return (-19); 6251 } 6252 if (net != NULL) { 6253 /* clear flag */ 6254 net->dest_state &= 6255 ~SCTP_ADDR_NOT_IN_ASSOC; 6256 } 6257 } else { 6258 /* 6259 * strange, address is in another 6260 * assoc? straighten out locks. 6261 */ 6262 if (stcb_tmp) 6263 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6264 /* 6265 * in setup state we 6266 * abort this guy 6267 */ 6268 sctp_abort_an_association(stcb_tmp->sctp_ep, 6269 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6270 goto add_it_now6; 6271 } 6272 SCTP_TCB_UNLOCK(stcb_tmp); 6273 6274 if (stcb->asoc.state == 0) { 6275 /* the assoc was freed? */ 6276 return (-21); 6277 } 6278 return (-22); 6279 } 6280 } 6281 } else 6282 #endif 6283 if (ptype == SCTP_ECN_CAPABLE) { 6284 ecn_allowed = 1; 6285 } else if (ptype == SCTP_ULP_ADAPTATION) { 6286 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6287 struct sctp_adaptation_layer_indication ai, 6288 *aip; 6289 6290 phdr = sctp_get_next_param(m, offset, 6291 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6292 aip = (struct sctp_adaptation_layer_indication *)phdr; 6293 if (aip) { 6294 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6295 stcb->asoc.adaptation_needed = 1; 6296 } 6297 } 6298 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6299 struct sctp_asconf_addr_param lstore, *fee; 6300 int lptype; 6301 struct sockaddr *lsa = NULL; 6302 6303 #ifdef INET 6304 struct sctp_asconf_addrv4_param *fii; 6305 6306 #endif 6307 6308 stcb->asoc.peer_supports_asconf = 1; 6309 if (plen > sizeof(lstore)) { 6310 return (-23); 6311 } 6312 phdr = sctp_get_next_param(m, offset, 6313 (struct sctp_paramhdr *)&lstore, 6314 min(plen, sizeof(lstore))); 6315 if (phdr == NULL) { 6316 return (-24); 6317 } 6318 fee = (struct sctp_asconf_addr_param *)phdr; 6319 lptype = ntohs(fee->addrp.ph.param_type); 6320 switch (lptype) { 6321 #ifdef INET 6322 case SCTP_IPV4_ADDRESS: 6323 if (plen != 6324 sizeof(struct sctp_asconf_addrv4_param)) { 6325 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6326 (int)sizeof(struct sctp_asconf_addrv4_param), 6327 plen); 6328 } else { 6329 fii = (struct sctp_asconf_addrv4_param *)fee; 6330 sin.sin_addr.s_addr = fii->addrp.addr; 6331 lsa = (struct sockaddr *)&sin; 6332 } 6333 break; 6334 #endif 6335 #ifdef INET6 6336 case SCTP_IPV6_ADDRESS: 6337 if (plen != 6338 sizeof(struct sctp_asconf_addr_param)) { 6339 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6340 (int)sizeof(struct sctp_asconf_addr_param), 6341 plen); 6342 } else { 6343 memcpy(sin6.sin6_addr.s6_addr, 6344 fee->addrp.addr, 6345 sizeof(fee->addrp.addr)); 6346 lsa = (struct sockaddr *)&sin6; 6347 } 6348 break; 6349 #endif 6350 default: 6351 break; 6352 } 6353 if (lsa) { 6354 (void)sctp_set_primary_addr(stcb, sa, NULL); 6355 } 6356 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6357 stcb->asoc.peer_supports_nat = 1; 6358 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6359 /* Peer supports pr-sctp */ 6360 stcb->asoc.peer_supports_prsctp = 1; 6361 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6362 /* A supported extension chunk */ 6363 struct sctp_supported_chunk_types_param *pr_supported; 6364 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6365 int num_ent, i; 6366 6367 phdr = sctp_get_next_param(m, offset, 6368 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6369 if (phdr == NULL) { 6370 return (-25); 6371 } 6372 stcb->asoc.peer_supports_asconf = 0; 6373 stcb->asoc.peer_supports_prsctp = 0; 6374 stcb->asoc.peer_supports_pktdrop = 0; 6375 stcb->asoc.peer_supports_strreset = 0; 6376 stcb->asoc.peer_supports_nr_sack = 0; 6377 stcb->asoc.peer_supports_auth = 0; 6378 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6379 num_ent = plen - sizeof(struct sctp_paramhdr); 6380 for (i = 0; i < num_ent; i++) { 6381 switch (pr_supported->chunk_types[i]) { 6382 case SCTP_ASCONF: 6383 case SCTP_ASCONF_ACK: 6384 stcb->asoc.peer_supports_asconf = 1; 6385 break; 6386 case SCTP_FORWARD_CUM_TSN: 6387 stcb->asoc.peer_supports_prsctp = 1; 6388 break; 6389 case SCTP_PACKET_DROPPED: 6390 stcb->asoc.peer_supports_pktdrop = 1; 6391 break; 6392 case SCTP_NR_SELECTIVE_ACK: 6393 stcb->asoc.peer_supports_nr_sack = 1; 6394 break; 6395 case SCTP_STREAM_RESET: 6396 stcb->asoc.peer_supports_strreset = 1; 6397 break; 6398 case SCTP_AUTHENTICATION: 6399 stcb->asoc.peer_supports_auth = 1; 6400 break; 6401 default: 6402 /* one I have not learned yet */ 6403 break; 6404 6405 } 6406 } 6407 } else if (ptype == SCTP_RANDOM) { 6408 if (plen > sizeof(random_store)) 6409 break; 6410 if (got_random) { 6411 /* already processed a RANDOM */ 6412 goto next_param; 6413 } 6414 phdr = sctp_get_next_param(m, offset, 6415 (struct sctp_paramhdr *)random_store, 6416 min(sizeof(random_store), plen)); 6417 if (phdr == NULL) 6418 return (-26); 6419 p_random = (struct sctp_auth_random *)phdr; 6420 random_len = plen - sizeof(*p_random); 6421 /* enforce the random length */ 6422 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6423 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6424 return (-27); 6425 } 6426 got_random = 1; 6427 } else if (ptype == SCTP_HMAC_LIST) { 6428 int num_hmacs; 6429 int i; 6430 6431 if (plen > sizeof(hmacs_store)) 6432 break; 6433 if (got_hmacs) { 6434 /* already processed a HMAC list */ 6435 goto next_param; 6436 } 6437 phdr = sctp_get_next_param(m, offset, 6438 (struct sctp_paramhdr *)hmacs_store, 6439 min(plen, sizeof(hmacs_store))); 6440 if (phdr == NULL) 6441 return (-28); 6442 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6443 hmacs_len = plen - sizeof(*hmacs); 6444 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6445 /* validate the hmac list */ 6446 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6447 return (-29); 6448 } 6449 if (stcb->asoc.peer_hmacs != NULL) 6450 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6451 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6452 if (stcb->asoc.peer_hmacs != NULL) { 6453 for (i = 0; i < num_hmacs; i++) { 6454 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6455 ntohs(hmacs->hmac_ids[i])); 6456 } 6457 } 6458 got_hmacs = 1; 6459 } else if (ptype == SCTP_CHUNK_LIST) { 6460 int i; 6461 6462 if (plen > sizeof(chunks_store)) 6463 break; 6464 if (got_chklist) { 6465 /* already processed a Chunks list */ 6466 goto next_param; 6467 } 6468 phdr = sctp_get_next_param(m, offset, 6469 (struct sctp_paramhdr *)chunks_store, 6470 min(plen, sizeof(chunks_store))); 6471 if (phdr == NULL) 6472 return (-30); 6473 chunks = (struct sctp_auth_chunk_list *)phdr; 6474 num_chunks = plen - sizeof(*chunks); 6475 if (stcb->asoc.peer_auth_chunks != NULL) 6476 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6477 else 6478 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6479 for (i = 0; i < num_chunks; i++) { 6480 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6481 stcb->asoc.peer_auth_chunks); 6482 /* record asconf/asconf-ack if listed */ 6483 if (chunks->chunk_types[i] == SCTP_ASCONF) 6484 saw_asconf = 1; 6485 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6486 saw_asconf_ack = 1; 6487 6488 } 6489 got_chklist = 1; 6490 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6491 (ptype == SCTP_STATE_COOKIE) || 6492 (ptype == SCTP_UNRECOG_PARAM) || 6493 (ptype == SCTP_COOKIE_PRESERVE) || 6494 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6495 (ptype == SCTP_ADD_IP_ADDRESS) || 6496 (ptype == SCTP_DEL_IP_ADDRESS) || 6497 (ptype == SCTP_ERROR_CAUSE_IND) || 6498 (ptype == SCTP_SUCCESS_REPORT)) { 6499 /* don't care */ ; 6500 } else { 6501 if ((ptype & 0x8000) == 0x0000) { 6502 /* 6503 * must stop processing the rest of the 6504 * param's. Any report bits were handled 6505 * with the call to 6506 * sctp_arethere_unrecognized_parameters() 6507 * when the INIT or INIT-ACK was first seen. 6508 */ 6509 break; 6510 } 6511 } 6512 6513 next_param: 6514 offset += SCTP_SIZE32(plen); 6515 if (offset >= limit) { 6516 break; 6517 } 6518 phdr = sctp_get_next_param(m, offset, &parm_buf, 6519 sizeof(parm_buf)); 6520 } 6521 /* Now check to see if we need to purge any addresses */ 6522 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6523 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6524 SCTP_ADDR_NOT_IN_ASSOC) { 6525 /* This address has been removed from the asoc */ 6526 /* remove and free it */ 6527 stcb->asoc.numnets--; 6528 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6529 sctp_free_remote_addr(net); 6530 if (net == stcb->asoc.primary_destination) { 6531 stcb->asoc.primary_destination = NULL; 6532 sctp_select_primary_destination(stcb); 6533 } 6534 } 6535 } 6536 if (ecn_allowed == 0) { 6537 stcb->asoc.ecn_allowed = 0; 6538 } 6539 /* validate authentication required parameters */ 6540 if (got_random && got_hmacs) { 6541 stcb->asoc.peer_supports_auth = 1; 6542 } else { 6543 stcb->asoc.peer_supports_auth = 0; 6544 } 6545 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6546 /* peer does not support auth but sent a chunks list? */ 6547 return (-31); 6548 } 6549 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6550 !stcb->asoc.peer_supports_auth) { 6551 /* peer supports asconf but not auth? */ 6552 return (-32); 6553 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6554 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6555 return (-33); 6556 } 6557 /* concatenate the full random key */ 6558 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6559 if (chunks != NULL) { 6560 keylen += sizeof(*chunks) + num_chunks; 6561 } 6562 new_key = sctp_alloc_key(keylen); 6563 if (new_key != NULL) { 6564 /* copy in the RANDOM */ 6565 if (p_random != NULL) { 6566 keylen = sizeof(*p_random) + random_len; 6567 bcopy(p_random, new_key->key, keylen); 6568 } 6569 /* append in the AUTH chunks */ 6570 if (chunks != NULL) { 6571 bcopy(chunks, new_key->key + keylen, 6572 sizeof(*chunks) + num_chunks); 6573 keylen += sizeof(*chunks) + num_chunks; 6574 } 6575 /* append in the HMACs */ 6576 if (hmacs != NULL) { 6577 bcopy(hmacs, new_key->key + keylen, 6578 sizeof(*hmacs) + hmacs_len); 6579 } 6580 } else { 6581 /* failed to get memory for the key */ 6582 return (-34); 6583 } 6584 if (stcb->asoc.authinfo.peer_random != NULL) 6585 sctp_free_key(stcb->asoc.authinfo.peer_random); 6586 stcb->asoc.authinfo.peer_random = new_key; 6587 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6588 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6589 6590 return (0); 6591 } 6592 6593 int 6594 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6595 struct sctp_nets *net) 6596 { 6597 /* make sure the requested primary address exists in the assoc */ 6598 if (net == NULL && sa) 6599 net = sctp_findnet(stcb, sa); 6600 6601 if (net == NULL) { 6602 /* didn't find the requested primary address! */ 6603 return (-1); 6604 } else { 6605 /* set the primary address */ 6606 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6607 /* Must be confirmed, so queue to set */ 6608 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6609 return (0); 6610 } 6611 stcb->asoc.primary_destination = net; 6612 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6613 sctp_free_remote_addr(stcb->asoc.alternate); 6614 stcb->asoc.alternate = NULL; 6615 } 6616 net = TAILQ_FIRST(&stcb->asoc.nets); 6617 if (net != stcb->asoc.primary_destination) { 6618 /* 6619 * first one on the list is NOT the primary 6620 * sctp_cmpaddr() is much more efficient if the 6621 * primary is the first on the list, make it so. 6622 */ 6623 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6624 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6625 } 6626 return (0); 6627 } 6628 } 6629 6630 int 6631 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6632 { 6633 /* 6634 * This function serves two purposes. It will see if a TAG can be 6635 * re-used and return 1 for yes it is ok and 0 for don't use that 6636 * tag. A secondary function it will do is purge out old tags that 6637 * can be removed. 6638 */ 6639 struct sctpvtaghead *chain; 6640 struct sctp_tagblock *twait_block; 6641 struct sctpasochead *head; 6642 struct sctp_tcb *stcb; 6643 int i; 6644 6645 SCTP_INP_INFO_RLOCK(); 6646 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6647 SCTP_BASE_INFO(hashasocmark))]; 6648 if (head == NULL) { 6649 /* invalid vtag */ 6650 goto skip_vtag_check; 6651 } 6652 LIST_FOREACH(stcb, head, sctp_asocs) { 6653 /* 6654 * We choose not to lock anything here. TCB's can't be 6655 * removed since we have the read lock, so they can't be 6656 * freed on us, same thing for the INP. I may be wrong with 6657 * this assumption, but we will go with it for now :-) 6658 */ 6659 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6660 continue; 6661 } 6662 if (stcb->asoc.my_vtag == tag) { 6663 /* candidate */ 6664 if (stcb->rport != rport) { 6665 continue; 6666 } 6667 if (stcb->sctp_ep->sctp_lport != lport) { 6668 continue; 6669 } 6670 /* Its a used tag set */ 6671 SCTP_INP_INFO_RUNLOCK(); 6672 return (0); 6673 } 6674 } 6675 skip_vtag_check: 6676 6677 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6678 /* Now what about timed wait ? */ 6679 if (!LIST_EMPTY(chain)) { 6680 /* 6681 * Block(s) are present, lets see if we have this tag in the 6682 * list 6683 */ 6684 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6685 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6686 if (twait_block->vtag_block[i].v_tag == 0) { 6687 /* not used */ 6688 continue; 6689 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6690 now->tv_sec) { 6691 /* Audit expires this guy */ 6692 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6693 twait_block->vtag_block[i].v_tag = 0; 6694 twait_block->vtag_block[i].lport = 0; 6695 twait_block->vtag_block[i].rport = 0; 6696 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6697 (twait_block->vtag_block[i].lport == lport) && 6698 (twait_block->vtag_block[i].rport == rport)) { 6699 /* Bad tag, sorry :< */ 6700 SCTP_INP_INFO_RUNLOCK(); 6701 return (0); 6702 } 6703 } 6704 } 6705 } 6706 SCTP_INP_INFO_RUNLOCK(); 6707 return (1); 6708 } 6709 6710 static void 6711 sctp_drain_mbufs(struct sctp_tcb *stcb) 6712 { 6713 /* 6714 * We must hunt this association for MBUF's past the cumack (i.e. 6715 * out of order data that we can renege on). 6716 */ 6717 struct sctp_association *asoc; 6718 struct sctp_tmit_chunk *chk, *nchk; 6719 uint32_t cumulative_tsn_p1; 6720 struct sctp_queued_to_read *ctl, *nctl; 6721 int cnt, strmat; 6722 uint32_t gap, i; 6723 int fnd = 0; 6724 6725 /* We look for anything larger than the cum-ack + 1 */ 6726 6727 asoc = &stcb->asoc; 6728 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6729 /* none we can reneg on. */ 6730 return; 6731 } 6732 SCTP_STAT_INCR(sctps_protocol_drains_done); 6733 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6734 cnt = 0; 6735 /* First look in the re-assembly queue */ 6736 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6737 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6738 /* Yep it is above cum-ack */ 6739 cnt++; 6740 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6741 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6742 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6743 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6744 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6745 if (chk->data) { 6746 sctp_m_freem(chk->data); 6747 chk->data = NULL; 6748 } 6749 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6750 } 6751 } 6752 /* Ok that was fun, now we will drain all the inbound streams? */ 6753 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6754 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6755 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6756 /* Yep it is above cum-ack */ 6757 cnt++; 6758 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6759 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6760 sctp_ucount_decr(asoc->cnt_on_all_streams); 6761 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6762 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6763 if (ctl->data) { 6764 sctp_m_freem(ctl->data); 6765 ctl->data = NULL; 6766 } 6767 sctp_free_remote_addr(ctl->whoFrom); 6768 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6769 SCTP_DECR_READQ_COUNT(); 6770 } 6771 } 6772 } 6773 if (cnt) { 6774 /* We must back down to see what the new highest is */ 6775 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6776 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6777 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6778 asoc->highest_tsn_inside_map = i; 6779 fnd = 1; 6780 break; 6781 } 6782 } 6783 if (!fnd) { 6784 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6785 } 6786 /* 6787 * Question, should we go through the delivery queue? The 6788 * only reason things are on here is the app not reading OR 6789 * a p-d-api up. An attacker COULD send enough in to 6790 * initiate the PD-API and then send a bunch of stuff to 6791 * other streams... these would wind up on the delivery 6792 * queue.. and then we would not get to them. But in order 6793 * to do this I then have to back-track and un-deliver 6794 * sequence numbers in streams.. el-yucko. I think for now 6795 * we will NOT look at the delivery queue and leave it to be 6796 * something to consider later. An alternative would be to 6797 * abort the P-D-API with a notification and then deliver 6798 * the data.... Or another method might be to keep track of 6799 * how many times the situation occurs and if we see a 6800 * possible attack underway just abort the association. 6801 */ 6802 #ifdef SCTP_DEBUG 6803 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6804 #endif 6805 /* 6806 * Now do we need to find a new 6807 * asoc->highest_tsn_inside_map? 6808 */ 6809 asoc->last_revoke_count = cnt; 6810 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6811 /* sa_ignore NO_NULL_CHK */ 6812 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6813 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6814 } 6815 /* 6816 * Another issue, in un-setting the TSN's in the mapping array we 6817 * DID NOT adjust the highest_tsn marker. This will cause one of 6818 * two things to occur. It may cause us to do extra work in checking 6819 * for our mapping array movement. More importantly it may cause us 6820 * to SACK every datagram. This may not be a bad thing though since 6821 * we will recover once we get our cum-ack above and all this stuff 6822 * we dumped recovered. 6823 */ 6824 } 6825 6826 void 6827 sctp_drain() 6828 { 6829 /* 6830 * We must walk the PCB lists for ALL associations here. The system 6831 * is LOW on MBUF's and needs help. This is where reneging will 6832 * occur. We really hope this does NOT happen! 6833 */ 6834 VNET_ITERATOR_DECL(vnet_iter); 6835 VNET_LIST_RLOCK_NOSLEEP(); 6836 VNET_FOREACH(vnet_iter) { 6837 CURVNET_SET(vnet_iter); 6838 struct sctp_inpcb *inp; 6839 struct sctp_tcb *stcb; 6840 6841 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6842 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6843 #ifdef VIMAGE 6844 continue; 6845 #else 6846 return; 6847 #endif 6848 } 6849 SCTP_INP_INFO_RLOCK(); 6850 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6851 /* For each endpoint */ 6852 SCTP_INP_RLOCK(inp); 6853 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6854 /* For each association */ 6855 SCTP_TCB_LOCK(stcb); 6856 sctp_drain_mbufs(stcb); 6857 SCTP_TCB_UNLOCK(stcb); 6858 } 6859 SCTP_INP_RUNLOCK(inp); 6860 } 6861 SCTP_INP_INFO_RUNLOCK(); 6862 CURVNET_RESTORE(); 6863 } 6864 VNET_LIST_RUNLOCK_NOSLEEP(); 6865 } 6866 6867 /* 6868 * start a new iterator 6869 * iterates through all endpoints and associations based on the pcb_state 6870 * flags and asoc_state. "af" (mandatory) is executed for all matching 6871 * assocs and "ef" (optional) is executed when the iterator completes. 6872 * "inpf" (optional) is executed for each new endpoint as it is being 6873 * iterated through. inpe (optional) is called when the inp completes 6874 * its way through all the stcbs. 6875 */ 6876 int 6877 sctp_initiate_iterator(inp_func inpf, 6878 asoc_func af, 6879 inp_func inpe, 6880 uint32_t pcb_state, 6881 uint32_t pcb_features, 6882 uint32_t asoc_state, 6883 void *argp, 6884 uint32_t argi, 6885 end_func ef, 6886 struct sctp_inpcb *s_inp, 6887 uint8_t chunk_output_off) 6888 { 6889 struct sctp_iterator *it = NULL; 6890 6891 if (af == NULL) { 6892 return (-1); 6893 } 6894 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6895 SCTP_M_ITER); 6896 if (it == NULL) { 6897 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6898 return (ENOMEM); 6899 } 6900 memset(it, 0, sizeof(*it)); 6901 it->function_assoc = af; 6902 it->function_inp = inpf; 6903 if (inpf) 6904 it->done_current_ep = 0; 6905 else 6906 it->done_current_ep = 1; 6907 it->function_atend = ef; 6908 it->pointer = argp; 6909 it->val = argi; 6910 it->pcb_flags = pcb_state; 6911 it->pcb_features = pcb_features; 6912 it->asoc_state = asoc_state; 6913 it->function_inp_end = inpe; 6914 it->no_chunk_output = chunk_output_off; 6915 it->vn = curvnet; 6916 if (s_inp) { 6917 /* Assume lock is held here */ 6918 it->inp = s_inp; 6919 SCTP_INP_INCR_REF(it->inp); 6920 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6921 } else { 6922 SCTP_INP_INFO_RLOCK(); 6923 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6924 if (it->inp) { 6925 SCTP_INP_INCR_REF(it->inp); 6926 } 6927 SCTP_INP_INFO_RUNLOCK(); 6928 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6929 6930 } 6931 SCTP_IPI_ITERATOR_WQ_LOCK(); 6932 6933 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6934 if (sctp_it_ctl.iterator_running == 0) { 6935 sctp_wakeup_iterator(); 6936 } 6937 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6938 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6939 return (0); 6940 } 6941