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 SCTP_INP_INFO_RUNLOCK(); 98 } 99 100 /*- 101 * Addresses are added to VRF's (Virtual Router's). For BSD we 102 * have only the default VRF 0. We maintain a hash list of 103 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 104 * these has a list of addresses. When we add a new address 105 * to a VRF we lookup the ifn/ifn_index, if the ifn does 106 * not exist we create it and add it to the list of IFN's 107 * within the VRF. Once we have the sctp_ifn, we add the 108 * address to the list. So we look something like: 109 * 110 * hash-vrf-table 111 * vrf-> ifn-> ifn -> ifn 112 * vrf | 113 * ... +--ifa-> ifa -> ifa 114 * vrf 115 * 116 * We keep these separate lists since the SCTP subsystem will 117 * point to these from its source address selection nets structure. 118 * When an address is deleted it does not happen right away on 119 * the SCTP side, it gets scheduled. What we do when a 120 * delete happens is immediately remove the address from 121 * the master list and decrement the refcount. As our 122 * addip iterator works through and frees the src address 123 * selection pointing to the sctp_ifa, eventually the refcount 124 * will reach 0 and we will delete it. Note that it is assumed 125 * that any locking on system level ifn/ifa is done at the 126 * caller of these functions and these routines will only 127 * lock the SCTP structures as they add or delete things. 128 * 129 * Other notes on VRF concepts. 130 * - An endpoint can be in multiple VRF's 131 * - An association lives within a VRF and only one VRF. 132 * - Any incoming packet we can deduce the VRF for by 133 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 134 * - Any downward send call or connect call must supply the 135 * VRF via ancillary data or via some sort of set default 136 * VRF socket option call (again for BSD no brainer since 137 * the VRF is always 0). 138 * - An endpoint may add multiple VRF's to it. 139 * - Listening sockets can accept associations in any 140 * of the VRF's they are in but the assoc will end up 141 * in only one VRF (gotten from the packet or connect/send). 142 * 143 */ 144 145 struct sctp_vrf * 146 sctp_allocate_vrf(int vrf_id) 147 { 148 struct sctp_vrf *vrf = NULL; 149 struct sctp_vrflist *bucket; 150 151 /* First allocate the VRF structure */ 152 vrf = sctp_find_vrf(vrf_id); 153 if (vrf) { 154 /* Already allocated */ 155 return (vrf); 156 } 157 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 158 SCTP_M_VRF); 159 if (vrf == NULL) { 160 /* No memory */ 161 #ifdef INVARIANTS 162 panic("No memory for VRF:%d", vrf_id); 163 #endif 164 return (NULL); 165 } 166 /* setup the VRF */ 167 memset(vrf, 0, sizeof(struct sctp_vrf)); 168 vrf->vrf_id = vrf_id; 169 LIST_INIT(&vrf->ifnlist); 170 vrf->total_ifa_count = 0; 171 vrf->refcount = 0; 172 /* now also setup table ids */ 173 SCTP_INIT_VRF_TABLEID(vrf); 174 /* Init the HASH of addresses */ 175 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 176 &vrf->vrf_addr_hashmark); 177 if (vrf->vrf_addr_hash == NULL) { 178 /* No memory */ 179 #ifdef INVARIANTS 180 panic("No memory for VRF:%d", vrf_id); 181 #endif 182 SCTP_FREE(vrf, SCTP_M_VRF); 183 return (NULL); 184 } 185 /* Add it to the hash table */ 186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 187 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 189 return (vrf); 190 } 191 192 193 struct sctp_ifn * 194 sctp_find_ifn(void *ifn, uint32_t ifn_index) 195 { 196 struct sctp_ifn *sctp_ifnp; 197 struct sctp_ifnlist *hash_ifn_head; 198 199 /* 200 * We assume the lock is held for the addresses if that's wrong 201 * problems could occur :-) 202 */ 203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 205 if (sctp_ifnp->ifn_index == ifn_index) { 206 return (sctp_ifnp); 207 } 208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 209 return (sctp_ifnp); 210 } 211 } 212 return (NULL); 213 } 214 215 216 struct sctp_vrf * 217 sctp_find_vrf(uint32_t vrf_id) 218 { 219 struct sctp_vrflist *bucket; 220 struct sctp_vrf *liste; 221 222 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 223 LIST_FOREACH(liste, bucket, next_vrf) { 224 if (vrf_id == liste->vrf_id) { 225 return (liste); 226 } 227 } 228 return (NULL); 229 } 230 231 232 void 233 sctp_free_vrf(struct sctp_vrf *vrf) 234 { 235 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 236 if (vrf->vrf_addr_hash) { 237 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 238 vrf->vrf_addr_hash = NULL; 239 } 240 /* We zero'd the count */ 241 LIST_REMOVE(vrf, next_vrf); 242 SCTP_FREE(vrf, SCTP_M_VRF); 243 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 244 } 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 } 260 261 262 void 263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 264 { 265 struct sctp_ifn *sctp_ifnp; 266 267 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 268 if (sctp_ifnp != NULL) { 269 sctp_ifnp->ifn_mtu = mtu; 270 } 271 } 272 273 274 void 275 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 276 { 277 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 278 /* We zero'd the count */ 279 if (sctp_ifap->ifn_p) { 280 sctp_free_ifn(sctp_ifap->ifn_p); 281 } 282 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 283 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 284 } 285 } 286 287 288 static void 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 290 { 291 struct sctp_ifn *found; 292 293 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 294 if (found == NULL) { 295 /* Not in the list.. sorry */ 296 return; 297 } 298 if (hold_addr_lock == 0) 299 SCTP_IPI_ADDR_WLOCK(); 300 LIST_REMOVE(sctp_ifnp, next_bucket); 301 LIST_REMOVE(sctp_ifnp, next_ifn); 302 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 303 sctp_ifnp->registered_af); 304 if (hold_addr_lock == 0) 305 SCTP_IPI_ADDR_WUNLOCK(); 306 /* Take away the reference, and possibly free it */ 307 sctp_free_ifn(sctp_ifnp); 308 } 309 310 311 void 312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 313 const char *if_name, uint32_t ifn_index) 314 { 315 struct sctp_vrf *vrf; 316 struct sctp_ifa *sctp_ifap; 317 318 SCTP_IPI_ADDR_RLOCK(); 319 vrf = sctp_find_vrf(vrf_id); 320 if (vrf == NULL) { 321 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 322 goto out; 323 324 } 325 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 326 if (sctp_ifap == NULL) { 327 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 328 goto out; 329 } 330 if (sctp_ifap->ifn_p == NULL) { 331 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 332 goto out; 333 } 334 if (if_name) { 335 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 337 sctp_ifap->ifn_p->ifn_name, if_name); 338 goto out; 339 } 340 } else { 341 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 342 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 343 sctp_ifap->ifn_p->ifn_index, ifn_index); 344 goto out; 345 } 346 } 347 348 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 349 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 350 out: 351 SCTP_IPI_ADDR_RUNLOCK(); 352 } 353 354 355 void 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 357 const char *if_name, uint32_t ifn_index) 358 { 359 struct sctp_vrf *vrf; 360 struct sctp_ifa *sctp_ifap; 361 362 SCTP_IPI_ADDR_RLOCK(); 363 vrf = sctp_find_vrf(vrf_id); 364 if (vrf == NULL) { 365 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 366 goto out; 367 368 } 369 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 370 if (sctp_ifap == NULL) { 371 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 372 goto out; 373 } 374 if (sctp_ifap->ifn_p == NULL) { 375 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 376 goto out; 377 } 378 if (if_name) { 379 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 380 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 381 sctp_ifap->ifn_p->ifn_name, if_name); 382 goto out; 383 } 384 } else { 385 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 386 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 387 sctp_ifap->ifn_p->ifn_index, ifn_index); 388 goto out; 389 } 390 } 391 392 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 393 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 394 out: 395 SCTP_IPI_ADDR_RUNLOCK(); 396 } 397 398 399 /*- 400 * Add an ifa to an ifn. 401 * Register the interface as necessary. 402 * NOTE: ADDR write lock MUST be held. 403 */ 404 static void 405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 406 { 407 int ifa_af; 408 409 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 410 sctp_ifap->ifn_p = sctp_ifnp; 411 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 412 /* update address counts */ 413 sctp_ifnp->ifa_count++; 414 ifa_af = sctp_ifap->address.sa.sa_family; 415 switch (ifa_af) { 416 #ifdef INET 417 case AF_INET: 418 sctp_ifnp->num_v4++; 419 break; 420 #endif 421 #ifdef INET6 422 case AF_INET6: 423 sctp_ifnp->num_v6++; 424 break; 425 #endif 426 default: 427 break; 428 } 429 if (sctp_ifnp->ifa_count == 1) { 430 /* register the new interface */ 431 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 432 sctp_ifnp->registered_af = ifa_af; 433 } 434 } 435 436 437 /*- 438 * Remove an ifa from its ifn. 439 * If no more addresses exist, remove the ifn too. Otherwise, re-register 440 * the interface based on the remaining address families left. 441 * NOTE: ADDR write lock MUST be held. 442 */ 443 static void 444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 445 { 446 LIST_REMOVE(sctp_ifap, next_ifa); 447 if (sctp_ifap->ifn_p) { 448 /* update address counts */ 449 sctp_ifap->ifn_p->ifa_count--; 450 switch (sctp_ifap->address.sa.sa_family) { 451 #ifdef INET 452 case AF_INET: 453 sctp_ifap->ifn_p->num_v4--; 454 break; 455 #endif 456 #ifdef INET6 457 case AF_INET6: 458 sctp_ifap->ifn_p->num_v6--; 459 break; 460 #endif 461 default: 462 break; 463 } 464 465 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 466 /* remove the ifn, possibly freeing it */ 467 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 468 } else { 469 /* re-register address family type, if needed */ 470 if ((sctp_ifap->ifn_p->num_v6 == 0) && 471 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 472 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 473 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 474 sctp_ifap->ifn_p->registered_af = AF_INET; 475 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 476 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 477 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 478 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 479 sctp_ifap->ifn_p->registered_af = AF_INET6; 480 } 481 /* free the ifn refcount */ 482 sctp_free_ifn(sctp_ifap->ifn_p); 483 } 484 sctp_ifap->ifn_p = NULL; 485 } 486 } 487 488 489 struct sctp_ifa * 490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 491 uint32_t ifn_type, const char *if_name, void *ifa, 492 struct sockaddr *addr, uint32_t ifa_flags, 493 int dynamic_add) 494 { 495 struct sctp_vrf *vrf; 496 struct sctp_ifn *sctp_ifnp = NULL; 497 struct sctp_ifa *sctp_ifap = NULL; 498 struct sctp_ifalist *hash_addr_head; 499 struct sctp_ifnlist *hash_ifn_head; 500 uint32_t hash_of_addr; 501 int new_ifn_af = 0; 502 503 #ifdef SCTP_DEBUG 504 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 505 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 506 #endif 507 SCTP_IPI_ADDR_WLOCK(); 508 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 509 if (sctp_ifnp) { 510 vrf = sctp_ifnp->vrf; 511 } else { 512 vrf = sctp_find_vrf(vrf_id); 513 if (vrf == NULL) { 514 vrf = sctp_allocate_vrf(vrf_id); 515 if (vrf == NULL) { 516 SCTP_IPI_ADDR_WUNLOCK(); 517 return (NULL); 518 } 519 } 520 } 521 if (sctp_ifnp == NULL) { 522 /* 523 * build one and add it, can't hold lock until after malloc 524 * done though. 525 */ 526 SCTP_IPI_ADDR_WUNLOCK(); 527 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 528 sizeof(struct sctp_ifn), SCTP_M_IFN); 529 if (sctp_ifnp == NULL) { 530 #ifdef INVARIANTS 531 panic("No memory for IFN"); 532 #endif 533 return (NULL); 534 } 535 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 536 sctp_ifnp->ifn_index = ifn_index; 537 sctp_ifnp->ifn_p = ifn; 538 sctp_ifnp->ifn_type = ifn_type; 539 sctp_ifnp->refcount = 0; 540 sctp_ifnp->vrf = vrf; 541 atomic_add_int(&vrf->refcount, 1); 542 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 543 if (if_name != NULL) { 544 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 545 } else { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 547 } 548 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 549 LIST_INIT(&sctp_ifnp->ifalist); 550 SCTP_IPI_ADDR_WLOCK(); 551 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 552 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 553 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 554 new_ifn_af = 1; 555 } 556 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 557 if (sctp_ifap) { 558 /* Hmm, it already exists? */ 559 if ((sctp_ifap->ifn_p) && 560 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 561 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 562 sctp_ifap->ifn_p->ifn_name, ifn_index, 563 (void *)sctp_ifap); 564 if (new_ifn_af) { 565 /* Remove the created one that we don't want */ 566 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 567 } 568 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 569 /* easy to solve, just switch back to active */ 570 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 571 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 572 sctp_ifap->ifn_p = sctp_ifnp; 573 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 574 } 575 exit_stage_left: 576 SCTP_IPI_ADDR_WUNLOCK(); 577 return (sctp_ifap); 578 } else { 579 if (sctp_ifap->ifn_p) { 580 /* 581 * The last IFN gets the address, remove the 582 * old one 583 */ 584 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 585 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 586 sctp_ifap->ifn_p->ifn_index, if_name, 587 ifn_index); 588 /* remove the address from the old ifn */ 589 sctp_remove_ifa_from_ifn(sctp_ifap); 590 /* move the address over to the new ifn */ 591 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 592 goto exit_stage_left; 593 } else { 594 /* repair ifnp which was NULL ? */ 595 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 596 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 597 (void *)sctp_ifnp, (void *)sctp_ifap); 598 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 599 } 600 goto exit_stage_left; 601 } 602 } 603 SCTP_IPI_ADDR_WUNLOCK(); 604 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 605 if (sctp_ifap == NULL) { 606 #ifdef INVARIANTS 607 panic("No memory for IFA"); 608 #endif 609 return (NULL); 610 } 611 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 612 sctp_ifap->ifn_p = sctp_ifnp; 613 atomic_add_int(&sctp_ifnp->refcount, 1); 614 sctp_ifap->vrf_id = vrf_id; 615 sctp_ifap->ifa = ifa; 616 memcpy(&sctp_ifap->address, addr, addr->sa_len); 617 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 618 sctp_ifap->flags = ifa_flags; 619 /* Set scope */ 620 switch (sctp_ifap->address.sa.sa_family) { 621 #ifdef INET 622 case AF_INET: 623 { 624 struct sockaddr_in *sin; 625 626 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 627 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 628 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 629 sctp_ifap->src_is_loop = 1; 630 } 631 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 632 sctp_ifap->src_is_priv = 1; 633 } 634 sctp_ifnp->num_v4++; 635 if (new_ifn_af) 636 new_ifn_af = AF_INET; 637 break; 638 } 639 #endif 640 #ifdef INET6 641 case AF_INET6: 642 { 643 /* ok to use deprecated addresses? */ 644 struct sockaddr_in6 *sin6; 645 646 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 647 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 648 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 649 sctp_ifap->src_is_loop = 1; 650 } 651 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 652 sctp_ifap->src_is_priv = 1; 653 } 654 sctp_ifnp->num_v6++; 655 if (new_ifn_af) 656 new_ifn_af = AF_INET6; 657 break; 658 } 659 #endif 660 default: 661 new_ifn_af = 0; 662 break; 663 } 664 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 665 666 if ((sctp_ifap->src_is_priv == 0) && 667 (sctp_ifap->src_is_loop == 0)) { 668 sctp_ifap->src_is_glob = 1; 669 } 670 SCTP_IPI_ADDR_WLOCK(); 671 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 672 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 673 sctp_ifap->refcount = 1; 674 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 675 sctp_ifnp->ifa_count++; 676 vrf->total_ifa_count++; 677 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 678 if (new_ifn_af) { 679 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 680 sctp_ifnp->registered_af = new_ifn_af; 681 } 682 SCTP_IPI_ADDR_WUNLOCK(); 683 if (dynamic_add) { 684 /* 685 * Bump up the refcount so that when the timer completes it 686 * will drop back down. 687 */ 688 struct sctp_laddr *wi; 689 690 atomic_add_int(&sctp_ifap->refcount, 1); 691 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 692 if (wi == NULL) { 693 /* 694 * Gak, what can we do? We have lost an address 695 * change can you say HOSED? 696 */ 697 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 698 /* Opps, must decrement the count */ 699 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 700 if_name); 701 return (NULL); 702 } 703 SCTP_INCR_LADDR_COUNT(); 704 bzero(wi, sizeof(*wi)); 705 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 706 wi->ifa = sctp_ifap; 707 wi->action = SCTP_ADD_IP_ADDRESS; 708 709 SCTP_WQ_ADDR_LOCK(); 710 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 711 SCTP_WQ_ADDR_UNLOCK(); 712 713 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 714 (struct sctp_inpcb *)NULL, 715 (struct sctp_tcb *)NULL, 716 (struct sctp_nets *)NULL); 717 } else { 718 /* it's ready for use */ 719 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 720 } 721 return (sctp_ifap); 722 } 723 724 void 725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 726 uint32_t ifn_index, const char *if_name) 727 { 728 struct sctp_vrf *vrf; 729 struct sctp_ifa *sctp_ifap = NULL; 730 731 SCTP_IPI_ADDR_WLOCK(); 732 vrf = sctp_find_vrf(vrf_id); 733 if (vrf == NULL) { 734 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 735 goto out_now; 736 } 737 #ifdef SCTP_DEBUG 738 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 739 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 740 #endif 741 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 742 if (sctp_ifap) { 743 /* Validate the delete */ 744 if (sctp_ifap->ifn_p) { 745 int valid = 0; 746 747 /*- 748 * The name has priority over the ifn_index 749 * if its given. We do this especially for 750 * panda who might recycle indexes fast. 751 */ 752 if (if_name) { 753 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 754 /* They match its a correct delete */ 755 valid = 1; 756 } 757 } 758 if (!valid) { 759 /* last ditch check ifn_index */ 760 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 761 valid = 1; 762 } 763 } 764 if (!valid) { 765 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 766 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 768 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 769 SCTP_IPI_ADDR_WUNLOCK(); 770 return; 771 } 772 } 773 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 774 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 775 /* 776 * We don't set the flag. This means that the structure will 777 * hang around in EP's that have bound specific to it until 778 * they close. This gives us TCP like behavior if someone 779 * removes an address (or for that matter adds it right 780 * back). 781 */ 782 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 783 vrf->total_ifa_count--; 784 LIST_REMOVE(sctp_ifap, next_bucket); 785 sctp_remove_ifa_from_ifn(sctp_ifap); 786 } 787 #ifdef SCTP_DEBUG 788 else { 789 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 790 ifn_index); 791 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 792 } 793 #endif 794 795 out_now: 796 SCTP_IPI_ADDR_WUNLOCK(); 797 if (sctp_ifap) { 798 struct sctp_laddr *wi; 799 800 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 801 if (wi == NULL) { 802 /* 803 * Gak, what can we do? We have lost an address 804 * change can you say HOSED? 805 */ 806 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 807 808 /* Oops, must decrement the count */ 809 sctp_free_ifa(sctp_ifap); 810 return; 811 } 812 SCTP_INCR_LADDR_COUNT(); 813 bzero(wi, sizeof(*wi)); 814 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 815 wi->ifa = sctp_ifap; 816 wi->action = SCTP_DEL_IP_ADDRESS; 817 SCTP_WQ_ADDR_LOCK(); 818 /* 819 * Should this really be a tailq? As it is we will process 820 * the newest first :-0 821 */ 822 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 823 SCTP_WQ_ADDR_UNLOCK(); 824 825 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 826 (struct sctp_inpcb *)NULL, 827 (struct sctp_tcb *)NULL, 828 (struct sctp_nets *)NULL); 829 } 830 return; 831 } 832 833 834 static int 835 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 836 { 837 int loopback_scope; 838 839 #if defined(INET) 840 int ipv4_local_scope, ipv4_addr_legal; 841 842 #endif 843 #if defined(INET6) 844 int local_scope, site_scope, ipv6_addr_legal; 845 846 #endif 847 struct sctp_vrf *vrf; 848 struct sctp_ifn *sctp_ifn; 849 struct sctp_ifa *sctp_ifa; 850 851 loopback_scope = stcb->asoc.scope.loopback_scope; 852 #if defined(INET) 853 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 854 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 855 #endif 856 #if defined(INET6) 857 local_scope = stcb->asoc.scope.local_scope; 858 site_scope = stcb->asoc.scope.site_scope; 859 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 860 #endif 861 862 SCTP_IPI_ADDR_RLOCK(); 863 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 864 if (vrf == NULL) { 865 /* no vrf, no addresses */ 866 SCTP_IPI_ADDR_RUNLOCK(); 867 return (0); 868 } 869 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 870 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 871 if ((loopback_scope == 0) && 872 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 873 continue; 874 } 875 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 876 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 877 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 878 /* 879 * We allow pending addresses, where 880 * we have sent an asconf-add to be 881 * considered valid. 882 */ 883 continue; 884 } 885 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 886 continue; 887 } 888 switch (sctp_ifa->address.sa.sa_family) { 889 #ifdef INET 890 case AF_INET: 891 if (ipv4_addr_legal) { 892 struct sockaddr_in *sin, 893 *rsin; 894 895 sin = &sctp_ifa->address.sin; 896 rsin = (struct sockaddr_in *)to; 897 if ((ipv4_local_scope == 0) && 898 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 899 continue; 900 } 901 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 902 SCTP_IPI_ADDR_RUNLOCK(); 903 return (1); 904 } 905 } 906 break; 907 #endif 908 #ifdef INET6 909 case AF_INET6: 910 if (ipv6_addr_legal) { 911 struct sockaddr_in6 *sin6, 912 *rsin6; 913 914 sin6 = &sctp_ifa->address.sin6; 915 rsin6 = (struct sockaddr_in6 *)to; 916 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 917 if (local_scope == 0) 918 continue; 919 if (sin6->sin6_scope_id == 0) { 920 if (sa6_recoverscope(sin6) != 0) 921 continue; 922 } 923 } 924 if ((site_scope == 0) && 925 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 926 continue; 927 } 928 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 929 SCTP_IPI_ADDR_RUNLOCK(); 930 return (1); 931 } 932 } 933 break; 934 #endif 935 default: 936 /* TSNH */ 937 break; 938 } 939 } 940 } 941 } else { 942 struct sctp_laddr *laddr; 943 944 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 945 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 946 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 947 continue; 948 } 949 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 950 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 951 /* 952 * We allow pending addresses, where we have 953 * sent an asconf-add to be considered 954 * valid. 955 */ 956 continue; 957 } 958 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 959 continue; 960 } 961 switch (to->sa_family) { 962 #ifdef INET 963 case AF_INET: 964 { 965 struct sockaddr_in *sin, *rsin; 966 967 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 968 rsin = (struct sockaddr_in *)to; 969 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 970 SCTP_IPI_ADDR_RUNLOCK(); 971 return (1); 972 } 973 break; 974 } 975 #endif 976 #ifdef INET6 977 case AF_INET6: 978 { 979 struct sockaddr_in6 *sin6, *rsin6; 980 981 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 982 rsin6 = (struct sockaddr_in6 *)to; 983 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 984 SCTP_IPI_ADDR_RUNLOCK(); 985 return (1); 986 } 987 break; 988 } 989 990 #endif 991 default: 992 /* TSNH */ 993 break; 994 } 995 996 } 997 } 998 SCTP_IPI_ADDR_RUNLOCK(); 999 return (0); 1000 } 1001 1002 1003 static struct sctp_tcb * 1004 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1005 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1006 { 1007 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1008 /* 1009 * If we support the TCP model, then we must now dig through to see 1010 * if we can find our endpoint in the list of tcp ep's. 1011 */ 1012 uint16_t lport, rport; 1013 struct sctppcbhead *ephead; 1014 struct sctp_inpcb *inp; 1015 struct sctp_laddr *laddr; 1016 struct sctp_tcb *stcb; 1017 struct sctp_nets *net; 1018 1019 if ((to == NULL) || (from == NULL)) { 1020 return (NULL); 1021 } 1022 switch (to->sa_family) { 1023 #ifdef INET 1024 case AF_INET: 1025 if (from->sa_family == AF_INET) { 1026 lport = ((struct sockaddr_in *)to)->sin_port; 1027 rport = ((struct sockaddr_in *)from)->sin_port; 1028 } else { 1029 return (NULL); 1030 } 1031 break; 1032 #endif 1033 #ifdef INET6 1034 case AF_INET6: 1035 if (from->sa_family == AF_INET6) { 1036 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1037 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042 #endif 1043 default: 1044 return (NULL); 1045 } 1046 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1047 /* 1048 * Ok now for each of the guys in this bucket we must look and see: 1049 * - Does the remote port match. - Does there single association's 1050 * addresses match this address (to). If so we update p_ep to point 1051 * to this ep and return the tcb from it. 1052 */ 1053 LIST_FOREACH(inp, ephead, sctp_hash) { 1054 SCTP_INP_RLOCK(inp); 1055 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1056 SCTP_INP_RUNLOCK(inp); 1057 continue; 1058 } 1059 if (lport != inp->sctp_lport) { 1060 SCTP_INP_RUNLOCK(inp); 1061 continue; 1062 } 1063 if (inp->def_vrf_id != vrf_id) { 1064 SCTP_INP_RUNLOCK(inp); 1065 continue; 1066 } 1067 /* check to see if the ep has one of the addresses */ 1068 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1069 /* We are NOT bound all, so look further */ 1070 int match = 0; 1071 1072 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1073 1074 if (laddr->ifa == NULL) { 1075 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 1076 continue; 1077 } 1078 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1079 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1080 continue; 1081 } 1082 if (laddr->ifa->address.sa.sa_family == 1083 to->sa_family) { 1084 /* see if it matches */ 1085 #ifdef INET 1086 if (from->sa_family == AF_INET) { 1087 struct sockaddr_in *intf_addr, 1088 *sin; 1089 1090 intf_addr = &laddr->ifa->address.sin; 1091 sin = (struct sockaddr_in *)to; 1092 if (sin->sin_addr.s_addr == 1093 intf_addr->sin_addr.s_addr) { 1094 match = 1; 1095 break; 1096 } 1097 } 1098 #endif 1099 #ifdef INET6 1100 if (from->sa_family == AF_INET6) { 1101 struct sockaddr_in6 *intf_addr6; 1102 struct sockaddr_in6 *sin6; 1103 1104 sin6 = (struct sockaddr_in6 *) 1105 to; 1106 intf_addr6 = &laddr->ifa->address.sin6; 1107 1108 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1109 intf_addr6)) { 1110 match = 1; 1111 break; 1112 } 1113 } 1114 #endif 1115 } 1116 } 1117 if (match == 0) { 1118 /* This endpoint does not have this address */ 1119 SCTP_INP_RUNLOCK(inp); 1120 continue; 1121 } 1122 } 1123 /* 1124 * Ok if we hit here the ep has the address, does it hold 1125 * the tcb? 1126 */ 1127 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1128 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1129 if (stcb == NULL) { 1130 SCTP_INP_RUNLOCK(inp); 1131 continue; 1132 } 1133 SCTP_TCB_LOCK(stcb); 1134 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1135 SCTP_TCB_UNLOCK(stcb); 1136 SCTP_INP_RUNLOCK(inp); 1137 continue; 1138 } 1139 if (stcb->rport != rport) { 1140 /* remote port does not match. */ 1141 SCTP_TCB_UNLOCK(stcb); 1142 SCTP_INP_RUNLOCK(inp); 1143 continue; 1144 } 1145 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1146 SCTP_TCB_UNLOCK(stcb); 1147 SCTP_INP_RUNLOCK(inp); 1148 continue; 1149 } 1150 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1151 SCTP_TCB_UNLOCK(stcb); 1152 SCTP_INP_RUNLOCK(inp); 1153 continue; 1154 } 1155 /* Does this TCB have a matching address? */ 1156 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1157 1158 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1159 /* not the same family, can't be a match */ 1160 continue; 1161 } 1162 switch (from->sa_family) { 1163 #ifdef INET 1164 case AF_INET: 1165 { 1166 struct sockaddr_in *sin, *rsin; 1167 1168 sin = (struct sockaddr_in *)&net->ro._l_addr; 1169 rsin = (struct sockaddr_in *)from; 1170 if (sin->sin_addr.s_addr == 1171 rsin->sin_addr.s_addr) { 1172 /* found it */ 1173 if (netp != NULL) { 1174 *netp = net; 1175 } 1176 /* 1177 * Update the endpoint 1178 * pointer 1179 */ 1180 *inp_p = inp; 1181 SCTP_INP_RUNLOCK(inp); 1182 return (stcb); 1183 } 1184 break; 1185 } 1186 #endif 1187 #ifdef INET6 1188 case AF_INET6: 1189 { 1190 struct sockaddr_in6 *sin6, *rsin6; 1191 1192 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1193 rsin6 = (struct sockaddr_in6 *)from; 1194 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1195 rsin6)) { 1196 /* found it */ 1197 if (netp != NULL) { 1198 *netp = net; 1199 } 1200 /* 1201 * Update the endpoint 1202 * pointer 1203 */ 1204 *inp_p = inp; 1205 SCTP_INP_RUNLOCK(inp); 1206 return (stcb); 1207 } 1208 break; 1209 } 1210 #endif 1211 default: 1212 /* TSNH */ 1213 break; 1214 } 1215 } 1216 SCTP_TCB_UNLOCK(stcb); 1217 SCTP_INP_RUNLOCK(inp); 1218 } 1219 return (NULL); 1220 } 1221 1222 1223 /* 1224 * rules for use 1225 * 1226 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1227 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1228 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1229 * NULL. 1230 */ 1231 1232 struct sctp_tcb * 1233 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1234 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1235 { 1236 struct sctpasochead *head; 1237 struct sctp_inpcb *inp; 1238 struct sctp_tcb *stcb = NULL; 1239 struct sctp_nets *net; 1240 uint16_t rport; 1241 1242 inp = *inp_p; 1243 switch (remote->sa_family) { 1244 #ifdef INET 1245 case AF_INET: 1246 rport = (((struct sockaddr_in *)remote)->sin_port); 1247 break; 1248 #endif 1249 #ifdef INET6 1250 case AF_INET6: 1251 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1252 break; 1253 #endif 1254 default: 1255 return (NULL); 1256 } 1257 if (locked_tcb) { 1258 /* 1259 * UN-lock so we can do proper locking here this occurs when 1260 * called from load_addresses_from_init. 1261 */ 1262 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1263 SCTP_TCB_UNLOCK(locked_tcb); 1264 } 1265 SCTP_INP_INFO_RLOCK(); 1266 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1267 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1268 /*- 1269 * Now either this guy is our listener or it's the 1270 * connector. If it is the one that issued the connect, then 1271 * it's only chance is to be the first TCB in the list. If 1272 * it is the acceptor, then do the special_lookup to hash 1273 * and find the real inp. 1274 */ 1275 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1276 /* to is peer addr, from is my addr */ 1277 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1278 netp, inp->def_vrf_id); 1279 if ((stcb != NULL) && (locked_tcb == NULL)) { 1280 /* we have a locked tcb, lower refcount */ 1281 SCTP_INP_DECR_REF(inp); 1282 } 1283 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1284 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1285 SCTP_TCB_LOCK(locked_tcb); 1286 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1287 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1288 } 1289 SCTP_INP_INFO_RUNLOCK(); 1290 return (stcb); 1291 } else { 1292 SCTP_INP_WLOCK(inp); 1293 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1294 goto null_return; 1295 } 1296 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1297 if (stcb == NULL) { 1298 goto null_return; 1299 } 1300 SCTP_TCB_LOCK(stcb); 1301 1302 if (stcb->rport != rport) { 1303 /* remote port does not match. */ 1304 SCTP_TCB_UNLOCK(stcb); 1305 goto null_return; 1306 } 1307 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1308 SCTP_TCB_UNLOCK(stcb); 1309 goto null_return; 1310 } 1311 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1312 SCTP_TCB_UNLOCK(stcb); 1313 goto null_return; 1314 } 1315 /* now look at the list of remote addresses */ 1316 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1317 #ifdef INVARIANTS 1318 if (net == (TAILQ_NEXT(net, sctp_next))) { 1319 panic("Corrupt net list"); 1320 } 1321 #endif 1322 if (net->ro._l_addr.sa.sa_family != 1323 remote->sa_family) { 1324 /* not the same family */ 1325 continue; 1326 } 1327 switch (remote->sa_family) { 1328 #ifdef INET 1329 case AF_INET: 1330 { 1331 struct sockaddr_in *sin, 1332 *rsin; 1333 1334 sin = (struct sockaddr_in *) 1335 &net->ro._l_addr; 1336 rsin = (struct sockaddr_in *)remote; 1337 if (sin->sin_addr.s_addr == 1338 rsin->sin_addr.s_addr) { 1339 /* found it */ 1340 if (netp != NULL) { 1341 *netp = net; 1342 } 1343 if (locked_tcb == NULL) { 1344 SCTP_INP_DECR_REF(inp); 1345 } else if (locked_tcb != stcb) { 1346 SCTP_TCB_LOCK(locked_tcb); 1347 } 1348 if (locked_tcb) { 1349 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1350 } 1351 SCTP_INP_WUNLOCK(inp); 1352 SCTP_INP_INFO_RUNLOCK(); 1353 return (stcb); 1354 } 1355 break; 1356 } 1357 #endif 1358 #ifdef INET6 1359 case AF_INET6: 1360 { 1361 struct sockaddr_in6 *sin6, 1362 *rsin6; 1363 1364 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1365 rsin6 = (struct sockaddr_in6 *)remote; 1366 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1367 rsin6)) { 1368 /* found it */ 1369 if (netp != NULL) { 1370 *netp = net; 1371 } 1372 if (locked_tcb == NULL) { 1373 SCTP_INP_DECR_REF(inp); 1374 } else if (locked_tcb != stcb) { 1375 SCTP_TCB_LOCK(locked_tcb); 1376 } 1377 if (locked_tcb) { 1378 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1379 } 1380 SCTP_INP_WUNLOCK(inp); 1381 SCTP_INP_INFO_RUNLOCK(); 1382 return (stcb); 1383 } 1384 break; 1385 } 1386 #endif 1387 default: 1388 /* TSNH */ 1389 break; 1390 } 1391 } 1392 SCTP_TCB_UNLOCK(stcb); 1393 } 1394 } else { 1395 SCTP_INP_WLOCK(inp); 1396 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1397 goto null_return; 1398 } 1399 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1400 inp->sctp_hashmark)]; 1401 if (head == NULL) { 1402 goto null_return; 1403 } 1404 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1405 if (stcb->rport != rport) { 1406 /* remote port does not match */ 1407 continue; 1408 } 1409 SCTP_TCB_LOCK(stcb); 1410 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1411 SCTP_TCB_UNLOCK(stcb); 1412 continue; 1413 } 1414 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1415 SCTP_TCB_UNLOCK(stcb); 1416 continue; 1417 } 1418 /* now look at the list of remote addresses */ 1419 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1420 #ifdef INVARIANTS 1421 if (net == (TAILQ_NEXT(net, sctp_next))) { 1422 panic("Corrupt net list"); 1423 } 1424 #endif 1425 if (net->ro._l_addr.sa.sa_family != 1426 remote->sa_family) { 1427 /* not the same family */ 1428 continue; 1429 } 1430 switch (remote->sa_family) { 1431 #ifdef INET 1432 case AF_INET: 1433 { 1434 struct sockaddr_in *sin, 1435 *rsin; 1436 1437 sin = (struct sockaddr_in *) 1438 &net->ro._l_addr; 1439 rsin = (struct sockaddr_in *)remote; 1440 if (sin->sin_addr.s_addr == 1441 rsin->sin_addr.s_addr) { 1442 /* found it */ 1443 if (netp != NULL) { 1444 *netp = net; 1445 } 1446 if (locked_tcb == NULL) { 1447 SCTP_INP_DECR_REF(inp); 1448 } else if (locked_tcb != stcb) { 1449 SCTP_TCB_LOCK(locked_tcb); 1450 } 1451 if (locked_tcb) { 1452 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1453 } 1454 SCTP_INP_WUNLOCK(inp); 1455 SCTP_INP_INFO_RUNLOCK(); 1456 return (stcb); 1457 } 1458 break; 1459 } 1460 #endif 1461 #ifdef INET6 1462 case AF_INET6: 1463 { 1464 struct sockaddr_in6 *sin6, 1465 *rsin6; 1466 1467 sin6 = (struct sockaddr_in6 *) 1468 &net->ro._l_addr; 1469 rsin6 = (struct sockaddr_in6 *)remote; 1470 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1471 rsin6)) { 1472 /* found it */ 1473 if (netp != NULL) { 1474 *netp = net; 1475 } 1476 if (locked_tcb == NULL) { 1477 SCTP_INP_DECR_REF(inp); 1478 } else if (locked_tcb != stcb) { 1479 SCTP_TCB_LOCK(locked_tcb); 1480 } 1481 if (locked_tcb) { 1482 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1483 } 1484 SCTP_INP_WUNLOCK(inp); 1485 SCTP_INP_INFO_RUNLOCK(); 1486 return (stcb); 1487 } 1488 break; 1489 } 1490 #endif 1491 default: 1492 /* TSNH */ 1493 break; 1494 } 1495 } 1496 SCTP_TCB_UNLOCK(stcb); 1497 } 1498 } 1499 null_return: 1500 /* clean up for returning null */ 1501 if (locked_tcb) { 1502 SCTP_TCB_LOCK(locked_tcb); 1503 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1504 } 1505 SCTP_INP_WUNLOCK(inp); 1506 SCTP_INP_INFO_RUNLOCK(); 1507 /* not found */ 1508 return (NULL); 1509 } 1510 1511 1512 /* 1513 * Find an association for a specific endpoint using the association id given 1514 * out in the COMM_UP notification 1515 */ 1516 struct sctp_tcb * 1517 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1518 { 1519 /* 1520 * Use my the assoc_id to find a endpoint 1521 */ 1522 struct sctpasochead *head; 1523 struct sctp_tcb *stcb; 1524 uint32_t id; 1525 1526 if (inp == NULL) { 1527 SCTP_PRINTF("TSNH ep_associd\n"); 1528 return (NULL); 1529 } 1530 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1531 SCTP_PRINTF("TSNH ep_associd0\n"); 1532 return (NULL); 1533 } 1534 id = (uint32_t) asoc_id; 1535 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1536 if (head == NULL) { 1537 /* invalid id TSNH */ 1538 SCTP_PRINTF("TSNH ep_associd1\n"); 1539 return (NULL); 1540 } 1541 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1542 if (stcb->asoc.assoc_id == id) { 1543 if (inp != stcb->sctp_ep) { 1544 /* 1545 * some other guy has the same id active (id 1546 * collision ??). 1547 */ 1548 SCTP_PRINTF("TSNH ep_associd2\n"); 1549 continue; 1550 } 1551 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1552 continue; 1553 } 1554 if (want_lock) { 1555 SCTP_TCB_LOCK(stcb); 1556 } 1557 return (stcb); 1558 } 1559 } 1560 return (NULL); 1561 } 1562 1563 1564 struct sctp_tcb * 1565 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1566 { 1567 struct sctp_tcb *stcb; 1568 1569 SCTP_INP_RLOCK(inp); 1570 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1571 SCTP_INP_RUNLOCK(inp); 1572 return (stcb); 1573 } 1574 1575 1576 /* 1577 * Endpoint probe expects that the INP_INFO is locked. 1578 */ 1579 static struct sctp_inpcb * 1580 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1581 uint16_t lport, uint32_t vrf_id) 1582 { 1583 struct sctp_inpcb *inp; 1584 struct sctp_laddr *laddr; 1585 1586 #ifdef INET 1587 struct sockaddr_in *sin; 1588 1589 #endif 1590 #ifdef INET6 1591 struct sockaddr_in6 *sin6; 1592 struct sockaddr_in6 *intf_addr6; 1593 1594 #endif 1595 int fnd; 1596 1597 #ifdef INET 1598 sin = NULL; 1599 #endif 1600 #ifdef INET6 1601 sin6 = NULL; 1602 #endif 1603 switch (nam->sa_family) { 1604 #ifdef INET 1605 case AF_INET: 1606 sin = (struct sockaddr_in *)nam; 1607 break; 1608 #endif 1609 #ifdef INET6 1610 case AF_INET6: 1611 sin6 = (struct sockaddr_in6 *)nam; 1612 break; 1613 #endif 1614 default: 1615 /* unsupported family */ 1616 return (NULL); 1617 } 1618 1619 if (head == NULL) 1620 return (NULL); 1621 1622 LIST_FOREACH(inp, head, sctp_hash) { 1623 SCTP_INP_RLOCK(inp); 1624 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1625 SCTP_INP_RUNLOCK(inp); 1626 continue; 1627 } 1628 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1629 (inp->sctp_lport == lport)) { 1630 /* got it */ 1631 #ifdef INET 1632 if ((nam->sa_family == AF_INET) && 1633 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1634 SCTP_IPV6_V6ONLY(inp)) { 1635 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1636 SCTP_INP_RUNLOCK(inp); 1637 continue; 1638 } 1639 #endif 1640 #ifdef INET6 1641 /* A V6 address and the endpoint is NOT bound V6 */ 1642 if (nam->sa_family == AF_INET6 && 1643 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1644 SCTP_INP_RUNLOCK(inp); 1645 continue; 1646 } 1647 #endif 1648 /* does a VRF id match? */ 1649 fnd = 0; 1650 if (inp->def_vrf_id == vrf_id) 1651 fnd = 1; 1652 1653 SCTP_INP_RUNLOCK(inp); 1654 if (!fnd) 1655 continue; 1656 return (inp); 1657 } 1658 SCTP_INP_RUNLOCK(inp); 1659 } 1660 switch (nam->sa_family) { 1661 #ifdef INET 1662 case AF_INET: 1663 if (sin->sin_addr.s_addr == INADDR_ANY) { 1664 /* Can't hunt for one that has no address specified */ 1665 return (NULL); 1666 } 1667 break; 1668 #endif 1669 #ifdef INET6 1670 case AF_INET6: 1671 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1672 /* Can't hunt for one that has no address specified */ 1673 return (NULL); 1674 } 1675 break; 1676 #endif 1677 default: 1678 break; 1679 } 1680 /* 1681 * ok, not bound to all so see if we can find a EP bound to this 1682 * address. 1683 */ 1684 LIST_FOREACH(inp, head, sctp_hash) { 1685 SCTP_INP_RLOCK(inp); 1686 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1687 SCTP_INP_RUNLOCK(inp); 1688 continue; 1689 } 1690 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1691 SCTP_INP_RUNLOCK(inp); 1692 continue; 1693 } 1694 /* 1695 * Ok this could be a likely candidate, look at all of its 1696 * addresses 1697 */ 1698 if (inp->sctp_lport != lport) { 1699 SCTP_INP_RUNLOCK(inp); 1700 continue; 1701 } 1702 /* does a VRF id match? */ 1703 fnd = 0; 1704 if (inp->def_vrf_id == vrf_id) 1705 fnd = 1; 1706 1707 if (!fnd) { 1708 SCTP_INP_RUNLOCK(inp); 1709 continue; 1710 } 1711 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1712 if (laddr->ifa == NULL) { 1713 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1714 __FUNCTION__); 1715 continue; 1716 } 1717 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1718 (void *)laddr->ifa); 1719 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1720 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1721 continue; 1722 } 1723 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1724 /* possible, see if it matches */ 1725 switch (nam->sa_family) { 1726 #ifdef INET 1727 case AF_INET: 1728 if (sin->sin_addr.s_addr == 1729 laddr->ifa->address.sin.sin_addr.s_addr) { 1730 SCTP_INP_RUNLOCK(inp); 1731 return (inp); 1732 } 1733 break; 1734 #endif 1735 #ifdef INET6 1736 case AF_INET6: 1737 intf_addr6 = &laddr->ifa->address.sin6; 1738 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1739 intf_addr6)) { 1740 SCTP_INP_RUNLOCK(inp); 1741 return (inp); 1742 } 1743 break; 1744 #endif 1745 } 1746 } 1747 } 1748 SCTP_INP_RUNLOCK(inp); 1749 } 1750 return (NULL); 1751 } 1752 1753 1754 static struct sctp_inpcb * 1755 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1756 { 1757 struct sctppcbhead *head; 1758 struct sctp_inpcb *t_inp; 1759 int fnd; 1760 1761 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1762 SCTP_BASE_INFO(hashmark))]; 1763 LIST_FOREACH(t_inp, head, sctp_hash) { 1764 if (t_inp->sctp_lport != lport) { 1765 continue; 1766 } 1767 /* is it in the VRF in question */ 1768 fnd = 0; 1769 if (t_inp->def_vrf_id == vrf_id) 1770 fnd = 1; 1771 if (!fnd) 1772 continue; 1773 1774 /* This one is in use. */ 1775 /* check the v6/v4 binding issue */ 1776 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1777 SCTP_IPV6_V6ONLY(t_inp)) { 1778 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1779 /* collision in V6 space */ 1780 return (t_inp); 1781 } else { 1782 /* inp is BOUND_V4 no conflict */ 1783 continue; 1784 } 1785 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1786 /* t_inp is bound v4 and v6, conflict always */ 1787 return (t_inp); 1788 } else { 1789 /* t_inp is bound only V4 */ 1790 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1791 SCTP_IPV6_V6ONLY(inp)) { 1792 /* no conflict */ 1793 continue; 1794 } 1795 /* else fall through to conflict */ 1796 } 1797 return (t_inp); 1798 } 1799 return (NULL); 1800 } 1801 1802 1803 int 1804 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1805 { 1806 /* For 1-2-1 with port reuse */ 1807 struct sctppcbhead *head; 1808 struct sctp_inpcb *tinp; 1809 1810 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1811 /* only works with port reuse on */ 1812 return (-1); 1813 } 1814 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1815 return (0); 1816 } 1817 SCTP_INP_RUNLOCK(inp); 1818 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1819 SCTP_BASE_INFO(hashmark))]; 1820 /* Kick out all non-listeners to the TCP hash */ 1821 LIST_FOREACH(tinp, head, sctp_hash) { 1822 if (tinp->sctp_lport != inp->sctp_lport) { 1823 continue; 1824 } 1825 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1826 continue; 1827 } 1828 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1829 continue; 1830 } 1831 if (tinp->sctp_socket->so_qlimit) { 1832 continue; 1833 } 1834 SCTP_INP_WLOCK(tinp); 1835 LIST_REMOVE(tinp, sctp_hash); 1836 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1837 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1838 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1839 SCTP_INP_WUNLOCK(tinp); 1840 } 1841 SCTP_INP_WLOCK(inp); 1842 /* Pull from where he was */ 1843 LIST_REMOVE(inp, sctp_hash); 1844 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1845 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1846 LIST_INSERT_HEAD(head, inp, sctp_hash); 1847 SCTP_INP_WUNLOCK(inp); 1848 SCTP_INP_RLOCK(inp); 1849 return (0); 1850 } 1851 1852 1853 struct sctp_inpcb * 1854 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1855 uint32_t vrf_id) 1856 { 1857 /* 1858 * First we check the hash table to see if someone has this port 1859 * bound with just the port. 1860 */ 1861 struct sctp_inpcb *inp; 1862 struct sctppcbhead *head; 1863 int lport; 1864 unsigned int i; 1865 1866 #ifdef INET 1867 struct sockaddr_in *sin; 1868 1869 #endif 1870 #ifdef INET6 1871 struct sockaddr_in6 *sin6; 1872 1873 #endif 1874 1875 switch (nam->sa_family) { 1876 #ifdef INET 1877 case AF_INET: 1878 sin = (struct sockaddr_in *)nam; 1879 lport = sin->sin_port; 1880 break; 1881 #endif 1882 #ifdef INET6 1883 case AF_INET6: 1884 sin6 = (struct sockaddr_in6 *)nam; 1885 lport = sin6->sin6_port; 1886 break; 1887 #endif 1888 default: 1889 return (NULL); 1890 } 1891 /* 1892 * I could cheat here and just cast to one of the types but we will 1893 * do it right. It also provides the check against an Unsupported 1894 * type too. 1895 */ 1896 /* Find the head of the ALLADDR chain */ 1897 if (have_lock == 0) { 1898 SCTP_INP_INFO_RLOCK(); 1899 } 1900 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1901 SCTP_BASE_INFO(hashmark))]; 1902 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1903 1904 /* 1905 * If the TCP model exists it could be that the main listening 1906 * endpoint is gone but there still exists a connected socket for 1907 * this guy. If so we can return the first one that we find. This 1908 * may NOT be the correct one so the caller should be wary on the 1909 * returned INP. Currently the only caller that sets find_tcp_pool 1910 * is in bindx where we are verifying that a user CAN bind the 1911 * address. He either has bound it already, or someone else has, or 1912 * its open to bind, so this is good enough. 1913 */ 1914 if (inp == NULL && find_tcp_pool) { 1915 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1916 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1917 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1918 if (inp) { 1919 break; 1920 } 1921 } 1922 } 1923 if (inp) { 1924 SCTP_INP_INCR_REF(inp); 1925 } 1926 if (have_lock == 0) { 1927 SCTP_INP_INFO_RUNLOCK(); 1928 } 1929 return (inp); 1930 } 1931 1932 1933 /* 1934 * Find an association for an endpoint with the pointer to whom you want to 1935 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1936 * need to change the *to to some other struct like a mbuf... 1937 */ 1938 struct sctp_tcb * 1939 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1940 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1941 uint32_t vrf_id) 1942 { 1943 struct sctp_inpcb *inp = NULL; 1944 struct sctp_tcb *stcb; 1945 1946 SCTP_INP_INFO_RLOCK(); 1947 if (find_tcp_pool) { 1948 if (inp_p != NULL) { 1949 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1950 vrf_id); 1951 } else { 1952 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1953 vrf_id); 1954 } 1955 if (stcb != NULL) { 1956 SCTP_INP_INFO_RUNLOCK(); 1957 return (stcb); 1958 } 1959 } 1960 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1961 if (inp_p != NULL) { 1962 *inp_p = inp; 1963 } 1964 SCTP_INP_INFO_RUNLOCK(); 1965 if (inp == NULL) { 1966 return (NULL); 1967 } 1968 /* 1969 * ok, we have an endpoint, now lets find the assoc for it (if any) 1970 * we now place the source address or from in the to of the find 1971 * endpoint call. Since in reality this chain is used from the 1972 * inbound packet side. 1973 */ 1974 if (inp_p != NULL) { 1975 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1976 NULL); 1977 } else { 1978 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 1979 NULL); 1980 } 1981 return (stcb); 1982 } 1983 1984 1985 /* 1986 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1987 * find all addresses that the sender has specified in any address list. Each 1988 * address will be used to lookup the TCB and see if one exits. 1989 */ 1990 static struct sctp_tcb * 1991 sctp_findassociation_special_addr(struct mbuf *m, int offset, 1992 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1993 struct sockaddr *dst) 1994 { 1995 struct sctp_paramhdr *phdr, parm_buf; 1996 1997 #if defined(INET) || defined(INET6) 1998 struct sctp_tcb *stcb; 1999 uint16_t ptype; 2000 2001 #endif 2002 uint16_t plen; 2003 2004 #ifdef INET 2005 struct sockaddr_in sin4; 2006 2007 #endif 2008 #ifdef INET6 2009 struct sockaddr_in6 sin6; 2010 2011 #endif 2012 2013 #ifdef INET 2014 memset(&sin4, 0, sizeof(sin4)); 2015 sin4.sin_len = sizeof(sin4); 2016 sin4.sin_family = AF_INET; 2017 sin4.sin_port = sh->src_port; 2018 #endif 2019 #ifdef INET6 2020 memset(&sin6, 0, sizeof(sin6)); 2021 sin6.sin6_len = sizeof(sin6); 2022 sin6.sin6_family = AF_INET6; 2023 sin6.sin6_port = sh->src_port; 2024 #endif 2025 2026 offset += sizeof(struct sctp_init_chunk); 2027 2028 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2029 while (phdr != NULL) { 2030 /* now we must see if we want the parameter */ 2031 #if defined(INET) || defined(INET6) 2032 ptype = ntohs(phdr->param_type); 2033 #endif 2034 plen = ntohs(phdr->param_length); 2035 if (plen == 0) { 2036 break; 2037 } 2038 #ifdef INET 2039 if (ptype == SCTP_IPV4_ADDRESS && 2040 plen == sizeof(struct sctp_ipv4addr_param)) { 2041 /* Get the rest of the address */ 2042 struct sctp_ipv4addr_param ip4_parm, *p4; 2043 2044 phdr = sctp_get_next_param(m, offset, 2045 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2046 if (phdr == NULL) { 2047 return (NULL); 2048 } 2049 p4 = (struct sctp_ipv4addr_param *)phdr; 2050 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2051 /* look it up */ 2052 stcb = sctp_findassociation_ep_addr(inp_p, 2053 (struct sockaddr *)&sin4, netp, dst, NULL); 2054 if (stcb != NULL) { 2055 return (stcb); 2056 } 2057 } 2058 #endif 2059 #ifdef INET6 2060 if (ptype == SCTP_IPV6_ADDRESS && 2061 plen == sizeof(struct sctp_ipv6addr_param)) { 2062 /* Get the rest of the address */ 2063 struct sctp_ipv6addr_param ip6_parm, *p6; 2064 2065 phdr = sctp_get_next_param(m, offset, 2066 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2067 if (phdr == NULL) { 2068 return (NULL); 2069 } 2070 p6 = (struct sctp_ipv6addr_param *)phdr; 2071 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2072 /* look it up */ 2073 stcb = sctp_findassociation_ep_addr(inp_p, 2074 (struct sockaddr *)&sin6, netp, dst, NULL); 2075 if (stcb != NULL) { 2076 return (stcb); 2077 } 2078 } 2079 #endif 2080 offset += SCTP_SIZE32(plen); 2081 phdr = sctp_get_next_param(m, offset, &parm_buf, 2082 sizeof(parm_buf)); 2083 } 2084 return (NULL); 2085 } 2086 2087 static struct sctp_tcb * 2088 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2089 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2090 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2091 { 2092 /* 2093 * Use my vtag to hash. If we find it we then verify the source addr 2094 * is in the assoc. If all goes well we save a bit on rec of a 2095 * packet. 2096 */ 2097 struct sctpasochead *head; 2098 struct sctp_nets *net; 2099 struct sctp_tcb *stcb; 2100 2101 SCTP_INP_INFO_RLOCK(); 2102 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2103 SCTP_BASE_INFO(hashasocmark))]; 2104 if (head == NULL) { 2105 /* invalid vtag */ 2106 SCTP_INP_INFO_RUNLOCK(); 2107 return (NULL); 2108 } 2109 LIST_FOREACH(stcb, head, sctp_asocs) { 2110 SCTP_INP_RLOCK(stcb->sctp_ep); 2111 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2112 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2113 continue; 2114 } 2115 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2116 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2117 continue; 2118 } 2119 SCTP_TCB_LOCK(stcb); 2120 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2121 if (stcb->asoc.my_vtag == vtag) { 2122 /* candidate */ 2123 if (stcb->rport != rport) { 2124 SCTP_TCB_UNLOCK(stcb); 2125 continue; 2126 } 2127 if (stcb->sctp_ep->sctp_lport != lport) { 2128 SCTP_TCB_UNLOCK(stcb); 2129 continue; 2130 } 2131 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2132 SCTP_TCB_UNLOCK(stcb); 2133 continue; 2134 } 2135 /* RRS:Need toaddr check here */ 2136 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2137 /* Endpoint does not own this address */ 2138 SCTP_TCB_UNLOCK(stcb); 2139 continue; 2140 } 2141 if (remote_tag) { 2142 /* 2143 * If we have both vtags that's all we match 2144 * on 2145 */ 2146 if (stcb->asoc.peer_vtag == remote_tag) { 2147 /* 2148 * If both tags match we consider it 2149 * conclusive and check NO 2150 * source/destination addresses 2151 */ 2152 goto conclusive; 2153 } 2154 } 2155 if (skip_src_check) { 2156 conclusive: 2157 if (from) { 2158 *netp = sctp_findnet(stcb, from); 2159 } else { 2160 *netp = NULL; /* unknown */ 2161 } 2162 if (inp_p) 2163 *inp_p = stcb->sctp_ep; 2164 SCTP_INP_INFO_RUNLOCK(); 2165 return (stcb); 2166 } 2167 net = sctp_findnet(stcb, from); 2168 if (net) { 2169 /* yep its him. */ 2170 *netp = net; 2171 SCTP_STAT_INCR(sctps_vtagexpress); 2172 *inp_p = stcb->sctp_ep; 2173 SCTP_INP_INFO_RUNLOCK(); 2174 return (stcb); 2175 } else { 2176 /* 2177 * not him, this should only happen in rare 2178 * cases so I peg it. 2179 */ 2180 SCTP_STAT_INCR(sctps_vtagbogus); 2181 } 2182 } 2183 SCTP_TCB_UNLOCK(stcb); 2184 } 2185 SCTP_INP_INFO_RUNLOCK(); 2186 return (NULL); 2187 } 2188 2189 2190 /* 2191 * Find an association with the pointer to the inbound IP packet. This can be 2192 * a IPv4 or IPv6 packet. 2193 */ 2194 struct sctp_tcb * 2195 sctp_findassociation_addr(struct mbuf *m, int offset, 2196 struct sockaddr *src, struct sockaddr *dst, 2197 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2198 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2199 { 2200 int find_tcp_pool; 2201 struct sctp_tcb *stcb; 2202 struct sctp_inpcb *inp; 2203 2204 if (sh->v_tag) { 2205 /* we only go down this path if vtag is non-zero */ 2206 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2207 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2208 if (stcb) { 2209 return (stcb); 2210 } 2211 } 2212 find_tcp_pool = 0; 2213 if ((ch->chunk_type != SCTP_INITIATION) && 2214 (ch->chunk_type != SCTP_INITIATION_ACK) && 2215 (ch->chunk_type != SCTP_COOKIE_ACK) && 2216 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2217 /* Other chunk types go to the tcp pool. */ 2218 find_tcp_pool = 1; 2219 } 2220 if (inp_p) { 2221 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2222 find_tcp_pool, vrf_id); 2223 inp = *inp_p; 2224 } else { 2225 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2226 find_tcp_pool, vrf_id); 2227 } 2228 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2229 if (stcb == NULL && inp) { 2230 /* Found a EP but not this address */ 2231 if ((ch->chunk_type == SCTP_INITIATION) || 2232 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2233 /*- 2234 * special hook, we do NOT return linp or an 2235 * association that is linked to an existing 2236 * association that is under the TCP pool (i.e. no 2237 * listener exists). The endpoint finding routine 2238 * will always find a listener before examining the 2239 * TCP pool. 2240 */ 2241 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2242 if (inp_p) { 2243 *inp_p = NULL; 2244 } 2245 return (NULL); 2246 } 2247 stcb = sctp_findassociation_special_addr(m, 2248 offset, sh, &inp, netp, dst); 2249 if (inp_p != NULL) { 2250 *inp_p = inp; 2251 } 2252 } 2253 } 2254 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2255 return (stcb); 2256 } 2257 2258 /* 2259 * lookup an association by an ASCONF lookup address. 2260 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2261 */ 2262 struct sctp_tcb * 2263 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2264 struct sockaddr *dst, struct sctphdr *sh, 2265 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2266 { 2267 struct sctp_tcb *stcb; 2268 struct sockaddr_storage remote_store; 2269 struct sctp_paramhdr parm_buf, *phdr; 2270 int ptype; 2271 int zero_address = 0; 2272 2273 #ifdef INET 2274 struct sockaddr_in *sin; 2275 2276 #endif 2277 #ifdef INET6 2278 struct sockaddr_in6 *sin6; 2279 2280 #endif 2281 2282 memset(&remote_store, 0, sizeof(remote_store)); 2283 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2284 &parm_buf, sizeof(struct sctp_paramhdr)); 2285 if (phdr == NULL) { 2286 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2287 __FUNCTION__); 2288 return NULL; 2289 } 2290 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2291 /* get the correlation address */ 2292 switch (ptype) { 2293 #ifdef INET6 2294 case SCTP_IPV6_ADDRESS: 2295 { 2296 /* ipv6 address param */ 2297 struct sctp_ipv6addr_param *p6, p6_buf; 2298 2299 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2300 return NULL; 2301 } 2302 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2303 offset + sizeof(struct sctp_asconf_chunk), 2304 &p6_buf.ph, sizeof(*p6)); 2305 if (p6 == NULL) { 2306 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2307 __FUNCTION__); 2308 return (NULL); 2309 } 2310 sin6 = (struct sockaddr_in6 *)&remote_store; 2311 sin6->sin6_family = AF_INET6; 2312 sin6->sin6_len = sizeof(*sin6); 2313 sin6->sin6_port = sh->src_port; 2314 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2315 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2316 zero_address = 1; 2317 break; 2318 } 2319 #endif 2320 #ifdef INET 2321 case SCTP_IPV4_ADDRESS: 2322 { 2323 /* ipv4 address param */ 2324 struct sctp_ipv4addr_param *p4, p4_buf; 2325 2326 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2327 return NULL; 2328 } 2329 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2330 offset + sizeof(struct sctp_asconf_chunk), 2331 &p4_buf.ph, sizeof(*p4)); 2332 if (p4 == NULL) { 2333 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2334 __FUNCTION__); 2335 return (NULL); 2336 } 2337 sin = (struct sockaddr_in *)&remote_store; 2338 sin->sin_family = AF_INET; 2339 sin->sin_len = sizeof(*sin); 2340 sin->sin_port = sh->src_port; 2341 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2342 if (sin->sin_addr.s_addr == INADDR_ANY) 2343 zero_address = 1; 2344 break; 2345 } 2346 #endif 2347 default: 2348 /* invalid address param type */ 2349 return NULL; 2350 } 2351 2352 if (zero_address) { 2353 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2354 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2355 if (stcb != NULL) { 2356 SCTP_INP_DECR_REF(*inp_p); 2357 } 2358 } else { 2359 stcb = sctp_findassociation_ep_addr(inp_p, 2360 (struct sockaddr *)&remote_store, netp, 2361 dst, NULL); 2362 } 2363 return (stcb); 2364 } 2365 2366 2367 /* 2368 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2369 * addresses. This way if we don't get a bind we by default pick a ephemeral 2370 * port with all addresses bound. 2371 */ 2372 int 2373 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2374 { 2375 /* 2376 * we get called when a new endpoint starts up. We need to allocate 2377 * the sctp_inpcb structure from the zone and init it. Mark it as 2378 * unbound and find a port that we can use as an ephemeral with 2379 * INADDR_ANY. If the user binds later no problem we can then add in 2380 * the specific addresses. And setup the default parameters for the 2381 * EP. 2382 */ 2383 int i, error; 2384 struct sctp_inpcb *inp; 2385 struct sctp_pcb *m; 2386 struct timeval time; 2387 sctp_sharedkey_t *null_key; 2388 2389 error = 0; 2390 2391 SCTP_INP_INFO_WLOCK(); 2392 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2393 if (inp == NULL) { 2394 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2395 SCTP_INP_INFO_WUNLOCK(); 2396 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2397 return (ENOBUFS); 2398 } 2399 /* zap it */ 2400 bzero(inp, sizeof(*inp)); 2401 2402 /* bump generations */ 2403 /* setup socket pointers */ 2404 inp->sctp_socket = so; 2405 inp->ip_inp.inp.inp_socket = so; 2406 #ifdef INET6 2407 if (INP_SOCKAF(so) == AF_INET6) { 2408 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2409 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2410 } 2411 if (MODULE_GLOBAL(ip6_v6only)) { 2412 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2413 } 2414 } 2415 #endif 2416 inp->sctp_associd_counter = 1; 2417 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2418 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2419 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2420 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2421 /* init the small hash table we use to track asocid <-> tcb */ 2422 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2423 if (inp->sctp_asocidhash == NULL) { 2424 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2425 SCTP_INP_INFO_WUNLOCK(); 2426 return (ENOBUFS); 2427 } 2428 #ifdef IPSEC 2429 { 2430 struct inpcbpolicy *pcb_sp = NULL; 2431 2432 error = ipsec_init_policy(so, &pcb_sp); 2433 /* Arrange to share the policy */ 2434 inp->ip_inp.inp.inp_sp = pcb_sp; 2435 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2436 } 2437 if (error != 0) { 2438 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2439 SCTP_INP_INFO_WUNLOCK(); 2440 return error; 2441 } 2442 #endif /* IPSEC */ 2443 SCTP_INCR_EP_COUNT(); 2444 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2445 SCTP_INP_INFO_WUNLOCK(); 2446 2447 so->so_pcb = (caddr_t)inp; 2448 2449 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2450 /* UDP style socket */ 2451 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2452 SCTP_PCB_FLAGS_UNBOUND); 2453 /* Be sure it is NON-BLOCKING IO for UDP */ 2454 /* SCTP_SET_SO_NBIO(so); */ 2455 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2456 /* TCP style socket */ 2457 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2458 SCTP_PCB_FLAGS_UNBOUND); 2459 /* Be sure we have blocking IO by default */ 2460 SCTP_CLEAR_SO_NBIO(so); 2461 } else { 2462 /* 2463 * unsupported socket type (RAW, etc)- in case we missed it 2464 * in protosw 2465 */ 2466 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2467 so->so_pcb = NULL; 2468 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2469 return (EOPNOTSUPP); 2470 } 2471 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2472 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2473 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2474 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2475 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2476 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2477 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2478 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2479 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2480 } 2481 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2482 &inp->sctp_hashmark); 2483 if (inp->sctp_tcbhash == NULL) { 2484 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2485 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2486 so->so_pcb = NULL; 2487 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2488 return (ENOBUFS); 2489 } 2490 inp->def_vrf_id = vrf_id; 2491 2492 SCTP_INP_INFO_WLOCK(); 2493 SCTP_INP_LOCK_INIT(inp); 2494 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2495 SCTP_INP_READ_INIT(inp); 2496 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2497 /* lock the new ep */ 2498 SCTP_INP_WLOCK(inp); 2499 2500 /* add it to the info area */ 2501 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2502 SCTP_INP_INFO_WUNLOCK(); 2503 2504 TAILQ_INIT(&inp->read_queue); 2505 LIST_INIT(&inp->sctp_addr_list); 2506 2507 LIST_INIT(&inp->sctp_asoc_list); 2508 2509 #ifdef SCTP_TRACK_FREED_ASOCS 2510 /* TEMP CODE */ 2511 LIST_INIT(&inp->sctp_asoc_free_list); 2512 #endif 2513 /* Init the timer structure for signature change */ 2514 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2515 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2516 2517 /* now init the actual endpoint default data */ 2518 m = &inp->sctp_ep; 2519 2520 /* setup the base timeout information */ 2521 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2522 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2523 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2524 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2525 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2526 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2527 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2528 /* all max/min max are in ms */ 2529 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2530 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2531 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2532 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2533 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2534 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2535 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2536 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2537 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2538 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2539 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2540 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2541 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2542 2543 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2544 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2545 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2546 /* number of streams to pre-open on a association */ 2547 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2548 2549 /* Add adaptation cookie */ 2550 m->adaptation_layer_indicator = 0; 2551 m->adaptation_layer_indicator_provided = 0; 2552 2553 /* seed random number generator */ 2554 m->random_counter = 1; 2555 m->store_at = SCTP_SIGNATURE_SIZE; 2556 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2557 sctp_fill_random_store(m); 2558 2559 /* Minimum cookie size */ 2560 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2561 sizeof(struct sctp_state_cookie); 2562 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2563 2564 /* Setup the initial secret */ 2565 (void)SCTP_GETTIME_TIMEVAL(&time); 2566 m->time_of_secret_change = time.tv_sec; 2567 2568 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2569 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2570 } 2571 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2572 2573 /* How long is a cookie good for ? */ 2574 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2575 /* 2576 * Initialize authentication parameters 2577 */ 2578 m->local_hmacs = sctp_default_supported_hmaclist(); 2579 m->local_auth_chunks = sctp_alloc_chunklist(); 2580 m->default_dscp = 0; 2581 #ifdef INET6 2582 m->default_flowlabel = 0; 2583 #endif 2584 m->port = 0; /* encapsulation disabled by default */ 2585 sctp_auth_set_default_chunks(m->local_auth_chunks); 2586 LIST_INIT(&m->shared_keys); 2587 /* add default NULL key as key id 0 */ 2588 null_key = sctp_alloc_sharedkey(); 2589 sctp_insert_sharedkey(&m->shared_keys, null_key); 2590 SCTP_INP_WUNLOCK(inp); 2591 #ifdef SCTP_LOG_CLOSING 2592 sctp_log_closing(inp, NULL, 12); 2593 #endif 2594 return (error); 2595 } 2596 2597 2598 void 2599 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2600 struct sctp_tcb *stcb) 2601 { 2602 struct sctp_nets *net; 2603 uint16_t lport, rport; 2604 struct sctppcbhead *head; 2605 struct sctp_laddr *laddr, *oladdr; 2606 2607 atomic_add_int(&stcb->asoc.refcnt, 1); 2608 SCTP_TCB_UNLOCK(stcb); 2609 SCTP_INP_INFO_WLOCK(); 2610 SCTP_INP_WLOCK(old_inp); 2611 SCTP_INP_WLOCK(new_inp); 2612 SCTP_TCB_LOCK(stcb); 2613 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2614 2615 new_inp->sctp_ep.time_of_secret_change = 2616 old_inp->sctp_ep.time_of_secret_change; 2617 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2618 sizeof(old_inp->sctp_ep.secret_key)); 2619 new_inp->sctp_ep.current_secret_number = 2620 old_inp->sctp_ep.current_secret_number; 2621 new_inp->sctp_ep.last_secret_number = 2622 old_inp->sctp_ep.last_secret_number; 2623 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2624 2625 /* make it so new data pours into the new socket */ 2626 stcb->sctp_socket = new_inp->sctp_socket; 2627 stcb->sctp_ep = new_inp; 2628 2629 /* Copy the port across */ 2630 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2631 rport = stcb->rport; 2632 /* Pull the tcb from the old association */ 2633 LIST_REMOVE(stcb, sctp_tcbhash); 2634 LIST_REMOVE(stcb, sctp_tcblist); 2635 if (stcb->asoc.in_asocid_hash) { 2636 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2637 } 2638 /* Now insert the new_inp into the TCP connected hash */ 2639 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2640 2641 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2642 /* Its safe to access */ 2643 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2644 2645 /* Now move the tcb into the endpoint list */ 2646 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2647 /* 2648 * Question, do we even need to worry about the ep-hash since we 2649 * only have one connection? Probably not :> so lets get rid of it 2650 * and not suck up any kernel memory in that. 2651 */ 2652 if (stcb->asoc.in_asocid_hash) { 2653 struct sctpasochead *lhd; 2654 2655 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2656 new_inp->hashasocidmark)]; 2657 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2658 } 2659 /* Ok. Let's restart timer. */ 2660 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2661 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2662 stcb, net); 2663 } 2664 2665 SCTP_INP_INFO_WUNLOCK(); 2666 if (new_inp->sctp_tcbhash != NULL) { 2667 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2668 new_inp->sctp_tcbhash = NULL; 2669 } 2670 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2671 /* Subset bound, so copy in the laddr list from the old_inp */ 2672 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2673 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2674 if (laddr == NULL) { 2675 /* 2676 * Gak, what can we do? This assoc is really 2677 * HOSED. We probably should send an abort 2678 * here. 2679 */ 2680 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2681 continue; 2682 } 2683 SCTP_INCR_LADDR_COUNT(); 2684 bzero(laddr, sizeof(*laddr)); 2685 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2686 laddr->ifa = oladdr->ifa; 2687 atomic_add_int(&laddr->ifa->refcount, 1); 2688 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2689 sctp_nxt_addr); 2690 new_inp->laddr_count++; 2691 if (oladdr == stcb->asoc.last_used_address) { 2692 stcb->asoc.last_used_address = laddr; 2693 } 2694 } 2695 } 2696 /* 2697 * Now any running timers need to be adjusted since we really don't 2698 * care if they are running or not just blast in the new_inp into 2699 * all of them. 2700 */ 2701 2702 stcb->asoc.dack_timer.ep = (void *)new_inp; 2703 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2704 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2705 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2706 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2707 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2708 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2709 /* now what about the nets? */ 2710 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2711 net->pmtu_timer.ep = (void *)new_inp; 2712 net->hb_timer.ep = (void *)new_inp; 2713 net->rxt_timer.ep = (void *)new_inp; 2714 } 2715 SCTP_INP_WUNLOCK(new_inp); 2716 SCTP_INP_WUNLOCK(old_inp); 2717 } 2718 2719 2720 2721 2722 /* sctp_ifap is used to bypass normal local address validation checks */ 2723 int 2724 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2725 struct sctp_ifa *sctp_ifap, struct thread *p) 2726 { 2727 /* bind a ep to a socket address */ 2728 struct sctppcbhead *head; 2729 struct sctp_inpcb *inp, *inp_tmp; 2730 struct inpcb *ip_inp; 2731 int port_reuse_active = 0; 2732 int bindall; 2733 uint16_t lport; 2734 int error; 2735 uint32_t vrf_id; 2736 2737 lport = 0; 2738 bindall = 1; 2739 inp = (struct sctp_inpcb *)so->so_pcb; 2740 ip_inp = (struct inpcb *)so->so_pcb; 2741 #ifdef SCTP_DEBUG 2742 if (addr) { 2743 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2744 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2745 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2746 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2747 } 2748 #endif 2749 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2750 /* already did a bind, subsequent binds NOT allowed ! */ 2751 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2752 return (EINVAL); 2753 } 2754 #ifdef INVARIANTS 2755 if (p == NULL) 2756 panic("null proc/thread"); 2757 #endif 2758 if (addr != NULL) { 2759 switch (addr->sa_family) { 2760 #ifdef INET 2761 case AF_INET: 2762 { 2763 struct sockaddr_in *sin; 2764 2765 /* IPV6_V6ONLY socket? */ 2766 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2767 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2768 return (EINVAL); 2769 } 2770 if (addr->sa_len != sizeof(*sin)) { 2771 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2772 return (EINVAL); 2773 } 2774 sin = (struct sockaddr_in *)addr; 2775 lport = sin->sin_port; 2776 /* 2777 * For LOOPBACK the prison_local_ip4() call 2778 * will transmute the ip address to the 2779 * proper value. 2780 */ 2781 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2782 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2783 return (error); 2784 } 2785 if (sin->sin_addr.s_addr != INADDR_ANY) { 2786 bindall = 0; 2787 } 2788 break; 2789 } 2790 #endif 2791 #ifdef INET6 2792 case AF_INET6: 2793 { 2794 /* 2795 * Only for pure IPv6 Address. (No IPv4 2796 * Mapped!) 2797 */ 2798 struct sockaddr_in6 *sin6; 2799 2800 sin6 = (struct sockaddr_in6 *)addr; 2801 2802 if (addr->sa_len != sizeof(*sin6)) { 2803 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2804 return (EINVAL); 2805 } 2806 lport = sin6->sin6_port; 2807 /* 2808 * For LOOPBACK the prison_local_ip6() call 2809 * will transmute the ipv6 address to the 2810 * proper value. 2811 */ 2812 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2813 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2814 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2815 return (error); 2816 } 2817 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2818 bindall = 0; 2819 /* KAME hack: embed scopeid */ 2820 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2821 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2822 return (EINVAL); 2823 } 2824 } 2825 /* this must be cleared for ifa_ifwithaddr() */ 2826 sin6->sin6_scope_id = 0; 2827 break; 2828 } 2829 #endif 2830 default: 2831 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2832 return (EAFNOSUPPORT); 2833 } 2834 } 2835 SCTP_INP_INFO_WLOCK(); 2836 SCTP_INP_WLOCK(inp); 2837 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2838 vrf_id = inp->def_vrf_id; 2839 2840 /* increase our count due to the unlock we do */ 2841 SCTP_INP_INCR_REF(inp); 2842 if (lport) { 2843 /* 2844 * Did the caller specify a port? if so we must see if an ep 2845 * already has this one bound. 2846 */ 2847 /* got to be root to get at low ports */ 2848 if (ntohs(lport) < IPPORT_RESERVED) { 2849 if (p && (error = 2850 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2851 )) { 2852 SCTP_INP_DECR_REF(inp); 2853 SCTP_INP_WUNLOCK(inp); 2854 SCTP_INP_INFO_WUNLOCK(); 2855 return (error); 2856 } 2857 } 2858 SCTP_INP_WUNLOCK(inp); 2859 if (bindall) { 2860 vrf_id = inp->def_vrf_id; 2861 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2862 if (inp_tmp != NULL) { 2863 /* 2864 * lock guy returned and lower count note 2865 * that we are not bound so inp_tmp should 2866 * NEVER be inp. And it is this inp 2867 * (inp_tmp) that gets the reference bump, 2868 * so we must lower it. 2869 */ 2870 SCTP_INP_DECR_REF(inp_tmp); 2871 /* unlock info */ 2872 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2873 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2874 /* 2875 * Ok, must be one-2-one and 2876 * allowing port re-use 2877 */ 2878 port_reuse_active = 1; 2879 goto continue_anyway; 2880 } 2881 SCTP_INP_DECR_REF(inp); 2882 SCTP_INP_INFO_WUNLOCK(); 2883 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2884 return (EADDRINUSE); 2885 } 2886 } else { 2887 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2888 if (inp_tmp != NULL) { 2889 /* 2890 * lock guy returned and lower count note 2891 * that we are not bound so inp_tmp should 2892 * NEVER be inp. And it is this inp 2893 * (inp_tmp) that gets the reference bump, 2894 * so we must lower it. 2895 */ 2896 SCTP_INP_DECR_REF(inp_tmp); 2897 /* unlock info */ 2898 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2899 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2900 /* 2901 * Ok, must be one-2-one and 2902 * allowing port re-use 2903 */ 2904 port_reuse_active = 1; 2905 goto continue_anyway; 2906 } 2907 SCTP_INP_DECR_REF(inp); 2908 SCTP_INP_INFO_WUNLOCK(); 2909 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2910 return (EADDRINUSE); 2911 } 2912 } 2913 continue_anyway: 2914 SCTP_INP_WLOCK(inp); 2915 if (bindall) { 2916 /* verify that no lport is not used by a singleton */ 2917 if ((port_reuse_active == 0) && 2918 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2919 /* Sorry someone already has this one bound */ 2920 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2921 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2922 port_reuse_active = 1; 2923 } else { 2924 SCTP_INP_DECR_REF(inp); 2925 SCTP_INP_WUNLOCK(inp); 2926 SCTP_INP_INFO_WUNLOCK(); 2927 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2928 return (EADDRINUSE); 2929 } 2930 } 2931 } 2932 } else { 2933 uint16_t first, last, candidate; 2934 uint16_t count; 2935 int done; 2936 2937 if (ip_inp->inp_flags & INP_HIGHPORT) { 2938 first = MODULE_GLOBAL(ipport_hifirstauto); 2939 last = MODULE_GLOBAL(ipport_hilastauto); 2940 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2941 if (p && (error = 2942 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2943 )) { 2944 SCTP_INP_DECR_REF(inp); 2945 SCTP_INP_WUNLOCK(inp); 2946 SCTP_INP_INFO_WUNLOCK(); 2947 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2948 return (error); 2949 } 2950 first = MODULE_GLOBAL(ipport_lowfirstauto); 2951 last = MODULE_GLOBAL(ipport_lowlastauto); 2952 } else { 2953 first = MODULE_GLOBAL(ipport_firstauto); 2954 last = MODULE_GLOBAL(ipport_lastauto); 2955 } 2956 if (first > last) { 2957 uint16_t temp; 2958 2959 temp = first; 2960 first = last; 2961 last = temp; 2962 } 2963 count = last - first + 1; /* number of candidates */ 2964 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2965 2966 done = 0; 2967 while (!done) { 2968 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2969 done = 1; 2970 } 2971 if (!done) { 2972 if (--count == 0) { 2973 SCTP_INP_DECR_REF(inp); 2974 SCTP_INP_WUNLOCK(inp); 2975 SCTP_INP_INFO_WUNLOCK(); 2976 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2977 return (EADDRINUSE); 2978 } 2979 if (candidate == last) 2980 candidate = first; 2981 else 2982 candidate = candidate + 1; 2983 } 2984 } 2985 lport = htons(candidate); 2986 } 2987 SCTP_INP_DECR_REF(inp); 2988 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2989 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2990 /* 2991 * this really should not happen. The guy did a non-blocking 2992 * bind and then did a close at the same time. 2993 */ 2994 SCTP_INP_WUNLOCK(inp); 2995 SCTP_INP_INFO_WUNLOCK(); 2996 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2997 return (EINVAL); 2998 } 2999 /* ok we look clear to give out this port, so lets setup the binding */ 3000 if (bindall) { 3001 /* binding to all addresses, so just set in the proper flags */ 3002 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3003 /* set the automatic addr changes from kernel flag */ 3004 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3005 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3006 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3007 } else { 3008 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3009 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3010 } 3011 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3012 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3013 } else { 3014 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3015 } 3016 /* 3017 * set the automatic mobility_base from kernel flag (by 3018 * micchie) 3019 */ 3020 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3021 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3022 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3023 } else { 3024 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3025 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3026 } 3027 /* 3028 * set the automatic mobility_fasthandoff from kernel flag 3029 * (by micchie) 3030 */ 3031 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3032 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3033 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3034 } else { 3035 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3036 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3037 } 3038 } else { 3039 /* 3040 * bind specific, make sure flags is off and add a new 3041 * address structure to the sctp_addr_list inside the ep 3042 * structure. 3043 * 3044 * We will need to allocate one and insert it at the head. The 3045 * socketopt call can just insert new addresses in there as 3046 * well. It will also have to do the embed scope kame hack 3047 * too (before adding). 3048 */ 3049 struct sctp_ifa *ifa; 3050 struct sockaddr_storage store_sa; 3051 3052 memset(&store_sa, 0, sizeof(store_sa)); 3053 switch (addr->sa_family) { 3054 #ifdef INET 3055 case AF_INET: 3056 { 3057 struct sockaddr_in *sin; 3058 3059 sin = (struct sockaddr_in *)&store_sa; 3060 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3061 sin->sin_port = 0; 3062 break; 3063 } 3064 #endif 3065 #ifdef INET6 3066 case AF_INET6: 3067 { 3068 struct sockaddr_in6 *sin6; 3069 3070 sin6 = (struct sockaddr_in6 *)&store_sa; 3071 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3072 sin6->sin6_port = 0; 3073 break; 3074 } 3075 #endif 3076 default: 3077 break; 3078 } 3079 /* 3080 * first find the interface with the bound address need to 3081 * zero out the port to find the address! yuck! can't do 3082 * this earlier since need port for sctp_pcb_findep() 3083 */ 3084 if (sctp_ifap != NULL) { 3085 ifa = sctp_ifap; 3086 } else { 3087 /* 3088 * Note for BSD we hit here always other O/S's will 3089 * pass things in via the sctp_ifap argument 3090 * (Panda). 3091 */ 3092 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3093 vrf_id, SCTP_ADDR_NOT_LOCKED); 3094 } 3095 if (ifa == NULL) { 3096 /* Can't find an interface with that address */ 3097 SCTP_INP_WUNLOCK(inp); 3098 SCTP_INP_INFO_WUNLOCK(); 3099 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3100 return (EADDRNOTAVAIL); 3101 } 3102 #ifdef INET6 3103 if (addr->sa_family == AF_INET6) { 3104 /* GAK, more FIXME IFA lock? */ 3105 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3106 /* Can't bind a non-existent addr. */ 3107 SCTP_INP_WUNLOCK(inp); 3108 SCTP_INP_INFO_WUNLOCK(); 3109 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3110 return (EINVAL); 3111 } 3112 } 3113 #endif 3114 /* we're not bound all */ 3115 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3116 /* allow bindx() to send ASCONF's for binding changes */ 3117 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3118 /* clear automatic addr changes from kernel flag */ 3119 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3120 3121 /* add this address to the endpoint list */ 3122 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3123 if (error != 0) { 3124 SCTP_INP_WUNLOCK(inp); 3125 SCTP_INP_INFO_WUNLOCK(); 3126 return (error); 3127 } 3128 inp->laddr_count++; 3129 } 3130 /* find the bucket */ 3131 if (port_reuse_active) { 3132 /* Put it into tcp 1-2-1 hash */ 3133 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3134 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3135 } else { 3136 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3137 } 3138 /* put it in the bucket */ 3139 LIST_INSERT_HEAD(head, inp, sctp_hash); 3140 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3141 (void *)head, ntohs(lport), port_reuse_active); 3142 /* set in the port */ 3143 inp->sctp_lport = lport; 3144 3145 /* turn off just the unbound flag */ 3146 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3147 SCTP_INP_WUNLOCK(inp); 3148 SCTP_INP_INFO_WUNLOCK(); 3149 return (0); 3150 } 3151 3152 3153 static void 3154 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3155 { 3156 struct sctp_iterator *it, *nit; 3157 3158 /* 3159 * We enter with the only the ITERATOR_LOCK in place and a write 3160 * lock on the inp_info stuff. 3161 */ 3162 it = sctp_it_ctl.cur_it; 3163 if (it && (it->vn != curvnet)) { 3164 /* Its not looking at our VNET */ 3165 return; 3166 } 3167 if (it && (it->inp == inp)) { 3168 /* 3169 * This is tricky and we hold the iterator lock, but when it 3170 * returns and gets the lock (when we release it) the 3171 * iterator will try to operate on inp. We need to stop that 3172 * from happening. But of course the iterator has a 3173 * reference on the stcb and inp. We can mark it and it will 3174 * stop. 3175 * 3176 * If its a single iterator situation, we set the end iterator 3177 * flag. Otherwise we set the iterator to go to the next 3178 * inp. 3179 * 3180 */ 3181 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3182 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3183 } else { 3184 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3185 } 3186 } 3187 /* 3188 * Now go through and remove any single reference to our inp that 3189 * may be still pending on the list 3190 */ 3191 SCTP_IPI_ITERATOR_WQ_LOCK(); 3192 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3193 if (it->vn != curvnet) { 3194 continue; 3195 } 3196 if (it->inp == inp) { 3197 /* This one points to me is it inp specific? */ 3198 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3199 /* Remove and free this one */ 3200 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3201 it, sctp_nxt_itr); 3202 if (it->function_atend != NULL) { 3203 (*it->function_atend) (it->pointer, it->val); 3204 } 3205 SCTP_FREE(it, SCTP_M_ITER); 3206 } else { 3207 it->inp = LIST_NEXT(it->inp, sctp_list); 3208 if (it->inp) { 3209 SCTP_INP_INCR_REF(it->inp); 3210 } 3211 } 3212 /* 3213 * When its put in the refcnt is incremented so decr 3214 * it 3215 */ 3216 SCTP_INP_DECR_REF(inp); 3217 } 3218 } 3219 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3220 } 3221 3222 /* release sctp_inpcb unbind the port */ 3223 void 3224 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3225 { 3226 /* 3227 * Here we free a endpoint. We must find it (if it is in the Hash 3228 * table) and remove it from there. Then we must also find it in the 3229 * overall list and remove it from there. After all removals are 3230 * complete then any timer has to be stopped. Then start the actual 3231 * freeing. a) Any local lists. b) Any associations. c) The hash of 3232 * all associations. d) finally the ep itself. 3233 */ 3234 struct sctp_tcb *asoc, *nasoc; 3235 struct sctp_laddr *laddr, *nladdr; 3236 struct inpcb *ip_pcb; 3237 struct socket *so; 3238 int being_refed = 0; 3239 struct sctp_queued_to_read *sq, *nsq; 3240 int cnt; 3241 sctp_sharedkey_t *shared_key, *nshared_key; 3242 3243 3244 #ifdef SCTP_LOG_CLOSING 3245 sctp_log_closing(inp, NULL, 0); 3246 #endif 3247 SCTP_ITERATOR_LOCK(); 3248 /* mark any iterators on the list or being processed */ 3249 sctp_iterator_inp_being_freed(inp); 3250 SCTP_ITERATOR_UNLOCK(); 3251 so = inp->sctp_socket; 3252 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3253 /* been here before.. eeks.. get out of here */ 3254 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3255 #ifdef SCTP_LOG_CLOSING 3256 sctp_log_closing(inp, NULL, 1); 3257 #endif 3258 return; 3259 } 3260 SCTP_ASOC_CREATE_LOCK(inp); 3261 SCTP_INP_INFO_WLOCK(); 3262 3263 SCTP_INP_WLOCK(inp); 3264 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3265 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3266 /* socket is gone, so no more wakeups allowed */ 3267 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3268 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3269 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3270 3271 } 3272 /* First time through we have the socket lock, after that no more. */ 3273 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3274 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3275 3276 if (inp->control) { 3277 sctp_m_freem(inp->control); 3278 inp->control = NULL; 3279 } 3280 if (inp->pkt) { 3281 sctp_m_freem(inp->pkt); 3282 inp->pkt = NULL; 3283 } 3284 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3285 * here but I will be nice :> (i.e. 3286 * ip_pcb = ep;) */ 3287 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3288 int cnt_in_sd; 3289 3290 cnt_in_sd = 0; 3291 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3292 SCTP_TCB_LOCK(asoc); 3293 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3294 /* Skip guys being freed */ 3295 cnt_in_sd++; 3296 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3297 /* 3298 * Special case - we did not start a 3299 * kill timer on the asoc due to it 3300 * was not closed. So go ahead and 3301 * start it now. 3302 */ 3303 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3304 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3305 } 3306 SCTP_TCB_UNLOCK(asoc); 3307 continue; 3308 } 3309 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3310 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3311 (asoc->asoc.total_output_queue_size == 0)) { 3312 /* 3313 * If we have data in queue, we don't want 3314 * to just free since the app may have done, 3315 * send()/close or connect/send/close. And 3316 * it wants the data to get across first. 3317 */ 3318 /* Just abandon things in the front states */ 3319 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3320 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3321 cnt_in_sd++; 3322 } 3323 continue; 3324 } 3325 /* Disconnect the socket please */ 3326 asoc->sctp_socket = NULL; 3327 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3328 if ((asoc->asoc.size_on_reasm_queue > 0) || 3329 (asoc->asoc.control_pdapi) || 3330 (asoc->asoc.size_on_all_streams > 0) || 3331 (so && (so->so_rcv.sb_cc > 0))) { 3332 /* Left with Data unread */ 3333 struct mbuf *op_err; 3334 3335 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3336 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3337 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3338 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3339 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3340 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3341 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3342 } 3343 if (sctp_free_assoc(inp, asoc, 3344 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3345 cnt_in_sd++; 3346 } 3347 continue; 3348 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3349 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3350 (asoc->asoc.stream_queue_cnt == 0)) { 3351 if (asoc->asoc.locked_on_sending) { 3352 goto abort_anyway; 3353 } 3354 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3355 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3356 struct sctp_nets *netp; 3357 3358 /* 3359 * there is nothing queued to send, 3360 * so I send shutdown 3361 */ 3362 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3363 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3364 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3365 } 3366 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3367 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3368 sctp_stop_timers_for_shutdown(asoc); 3369 if (asoc->asoc.alternate) { 3370 netp = asoc->asoc.alternate; 3371 } else { 3372 netp = asoc->asoc.primary_destination; 3373 } 3374 sctp_send_shutdown(asoc, netp); 3375 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3376 netp); 3377 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3378 asoc->asoc.primary_destination); 3379 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3380 } 3381 } else { 3382 /* mark into shutdown pending */ 3383 struct sctp_stream_queue_pending *sp; 3384 3385 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3386 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3387 asoc->asoc.primary_destination); 3388 if (asoc->asoc.locked_on_sending) { 3389 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3390 sctp_streamhead); 3391 if (sp == NULL) { 3392 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3393 (void *)asoc->asoc.locked_on_sending, 3394 asoc->asoc.locked_on_sending->stream_no); 3395 } else { 3396 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3397 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3398 } 3399 } 3400 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3401 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3402 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3403 struct mbuf *op_err; 3404 3405 abort_anyway: 3406 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3407 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3408 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3409 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3410 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3411 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3412 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3413 } 3414 if (sctp_free_assoc(inp, asoc, 3415 SCTP_PCBFREE_NOFORCE, 3416 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3417 cnt_in_sd++; 3418 } 3419 continue; 3420 } else { 3421 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3422 } 3423 } 3424 cnt_in_sd++; 3425 SCTP_TCB_UNLOCK(asoc); 3426 } 3427 /* now is there some left in our SHUTDOWN state? */ 3428 if (cnt_in_sd) { 3429 #ifdef SCTP_LOG_CLOSING 3430 sctp_log_closing(inp, NULL, 2); 3431 #endif 3432 inp->sctp_socket = NULL; 3433 SCTP_INP_WUNLOCK(inp); 3434 SCTP_ASOC_CREATE_UNLOCK(inp); 3435 SCTP_INP_INFO_WUNLOCK(); 3436 return; 3437 } 3438 } 3439 inp->sctp_socket = NULL; 3440 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3441 SCTP_PCB_FLAGS_UNBOUND) { 3442 /* 3443 * ok, this guy has been bound. It's port is somewhere in 3444 * the SCTP_BASE_INFO(hash table). Remove it! 3445 */ 3446 LIST_REMOVE(inp, sctp_hash); 3447 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3448 } 3449 /* 3450 * If there is a timer running to kill us, forget it, since it may 3451 * have a contest on the INP lock.. which would cause us to die ... 3452 */ 3453 cnt = 0; 3454 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3455 SCTP_TCB_LOCK(asoc); 3456 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3457 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3458 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3459 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3460 } 3461 cnt++; 3462 SCTP_TCB_UNLOCK(asoc); 3463 continue; 3464 } 3465 /* Free associations that are NOT killing us */ 3466 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3467 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3468 struct mbuf *op_err; 3469 3470 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3471 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3472 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3473 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3474 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3475 cnt++; 3476 SCTP_TCB_UNLOCK(asoc); 3477 continue; 3478 } 3479 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3480 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3481 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3482 } 3483 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3484 cnt++; 3485 } 3486 } 3487 if (cnt) { 3488 /* Ok we have someone out there that will kill us */ 3489 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3490 #ifdef SCTP_LOG_CLOSING 3491 sctp_log_closing(inp, NULL, 3); 3492 #endif 3493 SCTP_INP_WUNLOCK(inp); 3494 SCTP_ASOC_CREATE_UNLOCK(inp); 3495 SCTP_INP_INFO_WUNLOCK(); 3496 return; 3497 } 3498 if (SCTP_INP_LOCK_CONTENDED(inp)) 3499 being_refed++; 3500 if (SCTP_INP_READ_CONTENDED(inp)) 3501 being_refed++; 3502 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3503 being_refed++; 3504 3505 if ((inp->refcount) || 3506 (being_refed) || 3507 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3508 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3509 #ifdef SCTP_LOG_CLOSING 3510 sctp_log_closing(inp, NULL, 4); 3511 #endif 3512 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3513 SCTP_INP_WUNLOCK(inp); 3514 SCTP_ASOC_CREATE_UNLOCK(inp); 3515 SCTP_INP_INFO_WUNLOCK(); 3516 return; 3517 } 3518 inp->sctp_ep.signature_change.type = 0; 3519 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3520 /* 3521 * Remove it from the list .. last thing we need a lock for. 3522 */ 3523 LIST_REMOVE(inp, sctp_list); 3524 SCTP_INP_WUNLOCK(inp); 3525 SCTP_ASOC_CREATE_UNLOCK(inp); 3526 SCTP_INP_INFO_WUNLOCK(); 3527 /* 3528 * Now we release all locks. Since this INP cannot be found anymore 3529 * except possibly by the kill timer that might be running. We call 3530 * the drain function here. It should hit the case were it sees the 3531 * ACTIVE flag cleared and exit out freeing us to proceed and 3532 * destroy everything. 3533 */ 3534 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3535 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3536 } else { 3537 /* Probably un-needed */ 3538 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3539 } 3540 3541 #ifdef SCTP_LOG_CLOSING 3542 sctp_log_closing(inp, NULL, 5); 3543 #endif 3544 3545 3546 if ((inp->sctp_asocidhash) != NULL) { 3547 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3548 inp->sctp_asocidhash = NULL; 3549 } 3550 /* sa_ignore FREED_MEMORY */ 3551 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3552 /* Its only abandoned if it had data left */ 3553 if (sq->length) 3554 SCTP_STAT_INCR(sctps_left_abandon); 3555 3556 TAILQ_REMOVE(&inp->read_queue, sq, next); 3557 sctp_free_remote_addr(sq->whoFrom); 3558 if (so) 3559 so->so_rcv.sb_cc -= sq->length; 3560 if (sq->data) { 3561 sctp_m_freem(sq->data); 3562 sq->data = NULL; 3563 } 3564 /* 3565 * no need to free the net count, since at this point all 3566 * assoc's are gone. 3567 */ 3568 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3569 SCTP_DECR_READQ_COUNT(); 3570 } 3571 /* Now the sctp_pcb things */ 3572 /* 3573 * free each asoc if it is not already closed/free. we can't use the 3574 * macro here since le_next will get freed as part of the 3575 * sctp_free_assoc() call. 3576 */ 3577 if (so) { 3578 #ifdef IPSEC 3579 ipsec_delete_pcbpolicy(ip_pcb); 3580 #endif /* IPSEC */ 3581 3582 /* Unlocks not needed since the socket is gone now */ 3583 } 3584 if (ip_pcb->inp_options) { 3585 (void)sctp_m_free(ip_pcb->inp_options); 3586 ip_pcb->inp_options = 0; 3587 } 3588 #ifdef INET6 3589 if (ip_pcb->inp_vflag & INP_IPV6) { 3590 struct in6pcb *in6p; 3591 3592 in6p = (struct in6pcb *)inp; 3593 ip6_freepcbopts(in6p->in6p_outputopts); 3594 } 3595 #endif /* INET6 */ 3596 ip_pcb->inp_vflag = 0; 3597 /* free up authentication fields */ 3598 if (inp->sctp_ep.local_auth_chunks != NULL) 3599 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3600 if (inp->sctp_ep.local_hmacs != NULL) 3601 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3602 3603 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3604 LIST_REMOVE(shared_key, next); 3605 sctp_free_sharedkey(shared_key); 3606 /* sa_ignore FREED_MEMORY */ 3607 } 3608 3609 /* 3610 * if we have an address list the following will free the list of 3611 * ifaddr's that are set into this ep. Again macro limitations here, 3612 * since the LIST_FOREACH could be a bad idea. 3613 */ 3614 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3615 sctp_remove_laddr(laddr); 3616 } 3617 3618 #ifdef SCTP_TRACK_FREED_ASOCS 3619 /* TEMP CODE */ 3620 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3621 LIST_REMOVE(asoc, sctp_tcblist); 3622 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3623 SCTP_DECR_ASOC_COUNT(); 3624 } 3625 /* *** END TEMP CODE *** */ 3626 #endif 3627 /* Now lets see about freeing the EP hash table. */ 3628 if (inp->sctp_tcbhash != NULL) { 3629 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3630 inp->sctp_tcbhash = NULL; 3631 } 3632 /* Now we must put the ep memory back into the zone pool */ 3633 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3634 SCTP_INP_LOCK_DESTROY(inp); 3635 SCTP_INP_READ_DESTROY(inp); 3636 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3637 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3638 SCTP_DECR_EP_COUNT(); 3639 } 3640 3641 3642 struct sctp_nets * 3643 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3644 { 3645 struct sctp_nets *net; 3646 3647 /* locate the address */ 3648 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3649 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3650 return (net); 3651 } 3652 return (NULL); 3653 } 3654 3655 3656 int 3657 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3658 { 3659 struct sctp_ifa *sctp_ifa; 3660 3661 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3662 if (sctp_ifa) { 3663 return (1); 3664 } else { 3665 return (0); 3666 } 3667 } 3668 3669 /* 3670 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3671 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3672 * stats of stuff. 3673 */ 3674 int 3675 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3676 struct sctp_nets **netp, int set_scope, int from) 3677 { 3678 /* 3679 * The following is redundant to the same lines in the 3680 * sctp_aloc_assoc() but is needed since others call the add address 3681 * function 3682 */ 3683 struct sctp_nets *net, *netfirst; 3684 int addr_inscope; 3685 3686 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3687 from); 3688 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3689 3690 netfirst = sctp_findnet(stcb, newaddr); 3691 if (netfirst) { 3692 /* 3693 * Lie and return ok, we don't want to make the association 3694 * go away for this behavior. It will happen in the TCP 3695 * model in a connected socket. It does not reach the hash 3696 * table until after the association is built so it can't be 3697 * found. Mark as reachable, since the initial creation will 3698 * have been cleared and the NOT_IN_ASSOC flag will have 3699 * been added... and we don't want to end up removing it 3700 * back out. 3701 */ 3702 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3703 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3704 SCTP_ADDR_UNCONFIRMED); 3705 } else { 3706 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3707 } 3708 3709 return (0); 3710 } 3711 addr_inscope = 1; 3712 switch (newaddr->sa_family) { 3713 #ifdef INET 3714 case AF_INET: 3715 { 3716 struct sockaddr_in *sin; 3717 3718 sin = (struct sockaddr_in *)newaddr; 3719 if (sin->sin_addr.s_addr == 0) { 3720 /* Invalid address */ 3721 return (-1); 3722 } 3723 /* zero out the bzero area */ 3724 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3725 3726 /* assure len is set */ 3727 sin->sin_len = sizeof(struct sockaddr_in); 3728 if (set_scope) { 3729 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3730 stcb->asoc.scope.ipv4_local_scope = 1; 3731 #else 3732 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3733 stcb->asoc.scope.ipv4_local_scope = 1; 3734 } 3735 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3736 } else { 3737 /* Validate the address is in scope */ 3738 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3739 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3740 addr_inscope = 0; 3741 } 3742 } 3743 break; 3744 } 3745 #endif 3746 #ifdef INET6 3747 case AF_INET6: 3748 { 3749 struct sockaddr_in6 *sin6; 3750 3751 sin6 = (struct sockaddr_in6 *)newaddr; 3752 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3753 /* Invalid address */ 3754 return (-1); 3755 } 3756 /* assure len is set */ 3757 sin6->sin6_len = sizeof(struct sockaddr_in6); 3758 if (set_scope) { 3759 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3760 stcb->asoc.scope.loopback_scope = 1; 3761 stcb->asoc.scope.local_scope = 0; 3762 stcb->asoc.scope.ipv4_local_scope = 1; 3763 stcb->asoc.scope.site_scope = 1; 3764 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3765 /* 3766 * If the new destination is a 3767 * LINK_LOCAL we must have common 3768 * site scope. Don't set the local 3769 * scope since we may not share all 3770 * links, only loopback can do this. 3771 * Links on the local network would 3772 * also be on our private network 3773 * for v4 too. 3774 */ 3775 stcb->asoc.scope.ipv4_local_scope = 1; 3776 stcb->asoc.scope.site_scope = 1; 3777 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3778 /* 3779 * If the new destination is 3780 * SITE_LOCAL then we must have site 3781 * scope in common. 3782 */ 3783 stcb->asoc.scope.site_scope = 1; 3784 } 3785 } else { 3786 /* Validate the address is in scope */ 3787 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3788 (stcb->asoc.scope.loopback_scope == 0)) { 3789 addr_inscope = 0; 3790 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3791 (stcb->asoc.scope.local_scope == 0)) { 3792 addr_inscope = 0; 3793 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3794 (stcb->asoc.scope.site_scope == 0)) { 3795 addr_inscope = 0; 3796 } 3797 } 3798 break; 3799 } 3800 #endif 3801 default: 3802 /* not supported family type */ 3803 return (-1); 3804 } 3805 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3806 if (net == NULL) { 3807 return (-1); 3808 } 3809 SCTP_INCR_RADDR_COUNT(); 3810 bzero(net, sizeof(struct sctp_nets)); 3811 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3812 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3813 switch (newaddr->sa_family) { 3814 #ifdef INET 3815 case AF_INET: 3816 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3817 break; 3818 #endif 3819 #ifdef INET6 3820 case AF_INET6: 3821 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3822 break; 3823 #endif 3824 default: 3825 break; 3826 } 3827 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3828 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3829 stcb->asoc.scope.loopback_scope = 1; 3830 stcb->asoc.scope.ipv4_local_scope = 1; 3831 stcb->asoc.scope.local_scope = 0; 3832 stcb->asoc.scope.site_scope = 1; 3833 addr_inscope = 1; 3834 } 3835 net->failure_threshold = stcb->asoc.def_net_failure; 3836 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3837 if (addr_inscope == 0) { 3838 net->dest_state = (SCTP_ADDR_REACHABLE | 3839 SCTP_ADDR_OUT_OF_SCOPE); 3840 } else { 3841 if (from == SCTP_ADDR_IS_CONFIRMED) 3842 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3843 net->dest_state = SCTP_ADDR_REACHABLE; 3844 else 3845 net->dest_state = SCTP_ADDR_REACHABLE | 3846 SCTP_ADDR_UNCONFIRMED; 3847 } 3848 /* 3849 * We set this to 0, the timer code knows that this means its an 3850 * initial value 3851 */ 3852 net->rto_needed = 1; 3853 net->RTO = 0; 3854 net->RTO_measured = 0; 3855 stcb->asoc.numnets++; 3856 net->ref_count = 1; 3857 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3858 net->port = stcb->asoc.port; 3859 net->dscp = stcb->asoc.default_dscp; 3860 #ifdef INET6 3861 net->flowlabel = stcb->asoc.default_flowlabel; 3862 #endif 3863 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3864 net->dest_state |= SCTP_ADDR_NOHB; 3865 } else { 3866 net->dest_state &= ~SCTP_ADDR_NOHB; 3867 } 3868 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3869 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3870 } else { 3871 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3872 } 3873 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3874 /* Init the timer structure */ 3875 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3876 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3877 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3878 3879 /* Now generate a route for this guy */ 3880 #ifdef INET6 3881 /* KAME hack: embed scopeid */ 3882 if (newaddr->sa_family == AF_INET6) { 3883 struct sockaddr_in6 *sin6; 3884 3885 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3886 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3887 sin6->sin6_scope_id = 0; 3888 } 3889 #endif 3890 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3891 3892 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3893 /* Get source address */ 3894 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3895 stcb, 3896 (sctp_route_t *) & net->ro, 3897 net, 3898 0, 3899 stcb->asoc.vrf_id); 3900 /* Now get the interface MTU */ 3901 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3902 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3903 } 3904 if (net->mtu > 0) { 3905 uint32_t rmtu; 3906 3907 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3908 if (rmtu == 0) { 3909 /* 3910 * Start things off to match mtu of 3911 * interface please. 3912 */ 3913 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3914 net->ro.ro_rt, net->mtu); 3915 } else { 3916 /* 3917 * we take the route mtu over the interface, 3918 * since the route may be leading out the 3919 * loopback, or a different interface. 3920 */ 3921 net->mtu = rmtu; 3922 } 3923 } 3924 } 3925 if (net->mtu == 0) { 3926 switch (newaddr->sa_family) { 3927 #ifdef INET 3928 case AF_INET: 3929 net->mtu = SCTP_DEFAULT_MTU; 3930 break; 3931 #endif 3932 #ifdef INET6 3933 case AF_INET6: 3934 net->mtu = 1280; 3935 break; 3936 #endif 3937 default: 3938 break; 3939 } 3940 } 3941 if (net->port) { 3942 net->mtu -= (uint32_t) sizeof(struct udphdr); 3943 } 3944 if (from == SCTP_ALLOC_ASOC) { 3945 stcb->asoc.smallest_mtu = net->mtu; 3946 } 3947 if (stcb->asoc.smallest_mtu > net->mtu) { 3948 stcb->asoc.smallest_mtu = net->mtu; 3949 } 3950 #ifdef INET6 3951 if (newaddr->sa_family == AF_INET6) { 3952 struct sockaddr_in6 *sin6; 3953 3954 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3955 (void)sa6_recoverscope(sin6); 3956 } 3957 #endif 3958 3959 /* JRS - Use the congestion control given in the CC module */ 3960 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 3961 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 3962 3963 /* 3964 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3965 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3966 */ 3967 net->find_pseudo_cumack = 1; 3968 net->find_rtx_pseudo_cumack = 1; 3969 net->src_addr_selected = 0; 3970 /* Choose an initial flowid. */ 3971 net->flowid = stcb->asoc.my_vtag ^ 3972 ntohs(stcb->rport) ^ 3973 ntohs(stcb->sctp_ep->sctp_lport); 3974 #ifdef INVARIANTS 3975 net->flowidset = 1; 3976 #endif 3977 if (netp) { 3978 *netp = net; 3979 } 3980 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3981 if (net->ro.ro_rt == NULL) { 3982 /* Since we have no route put it at the back */ 3983 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3984 } else if (netfirst == NULL) { 3985 /* We are the first one in the pool. */ 3986 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3987 } else if (netfirst->ro.ro_rt == NULL) { 3988 /* 3989 * First one has NO route. Place this one ahead of the first 3990 * one. 3991 */ 3992 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3993 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3994 /* 3995 * This one has a different interface than the one at the 3996 * top of the list. Place it ahead. 3997 */ 3998 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3999 } else { 4000 /* 4001 * Ok we have the same interface as the first one. Move 4002 * forward until we find either a) one with a NULL route... 4003 * insert ahead of that b) one with a different ifp.. insert 4004 * after that. c) end of the list.. insert at the tail. 4005 */ 4006 struct sctp_nets *netlook; 4007 4008 do { 4009 netlook = TAILQ_NEXT(netfirst, sctp_next); 4010 if (netlook == NULL) { 4011 /* End of the list */ 4012 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4013 break; 4014 } else if (netlook->ro.ro_rt == NULL) { 4015 /* next one has NO route */ 4016 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4017 break; 4018 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4019 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4020 net, sctp_next); 4021 break; 4022 } 4023 /* Shift forward */ 4024 netfirst = netlook; 4025 } while (netlook != NULL); 4026 } 4027 4028 /* got to have a primary set */ 4029 if (stcb->asoc.primary_destination == 0) { 4030 stcb->asoc.primary_destination = net; 4031 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4032 (net->ro.ro_rt) && 4033 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4034 /* No route to current primary adopt new primary */ 4035 stcb->asoc.primary_destination = net; 4036 } 4037 /* Validate primary is first */ 4038 net = TAILQ_FIRST(&stcb->asoc.nets); 4039 if ((net != stcb->asoc.primary_destination) && 4040 (stcb->asoc.primary_destination)) { 4041 /* 4042 * first one on the list is NOT the primary sctp_cmpaddr() 4043 * is much more efficient if the primary is the first on the 4044 * list, make it so. 4045 */ 4046 TAILQ_REMOVE(&stcb->asoc.nets, 4047 stcb->asoc.primary_destination, sctp_next); 4048 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4049 stcb->asoc.primary_destination, sctp_next); 4050 } 4051 return (0); 4052 } 4053 4054 4055 static uint32_t 4056 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4057 { 4058 uint32_t id; 4059 struct sctpasochead *head; 4060 struct sctp_tcb *lstcb; 4061 4062 SCTP_INP_WLOCK(inp); 4063 try_again: 4064 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4065 /* TSNH */ 4066 SCTP_INP_WUNLOCK(inp); 4067 return (0); 4068 } 4069 /* 4070 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4071 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4072 */ 4073 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4074 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4075 } 4076 id = inp->sctp_associd_counter; 4077 inp->sctp_associd_counter++; 4078 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4079 if (lstcb) { 4080 goto try_again; 4081 } 4082 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4083 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4084 stcb->asoc.in_asocid_hash = 1; 4085 SCTP_INP_WUNLOCK(inp); 4086 return id; 4087 } 4088 4089 /* 4090 * allocate an association and add it to the endpoint. The caller must be 4091 * careful to add all additional addresses once they are know right away or 4092 * else the assoc will be may experience a blackout scenario. 4093 */ 4094 struct sctp_tcb * 4095 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4096 int *error, uint32_t override_tag, uint32_t vrf_id, 4097 struct thread *p 4098 ) 4099 { 4100 /* note the p argument is only valid in unbound sockets */ 4101 4102 struct sctp_tcb *stcb; 4103 struct sctp_association *asoc; 4104 struct sctpasochead *head; 4105 uint16_t rport; 4106 int err; 4107 4108 /* 4109 * Assumption made here: Caller has done a 4110 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4111 * address does not exist already. 4112 */ 4113 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4114 /* Hit max assoc, sorry no more */ 4115 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4116 *error = ENOBUFS; 4117 return (NULL); 4118 } 4119 if (firstaddr == NULL) { 4120 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4121 *error = EINVAL; 4122 return (NULL); 4123 } 4124 SCTP_INP_RLOCK(inp); 4125 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4126 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4127 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4128 /* 4129 * If its in the TCP pool, its NOT allowed to create an 4130 * association. The parent listener needs to call 4131 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4132 * off, or connected one does this.. its an error. 4133 */ 4134 SCTP_INP_RUNLOCK(inp); 4135 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4136 *error = EINVAL; 4137 return (NULL); 4138 } 4139 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4140 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4141 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4142 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4143 SCTP_INP_RUNLOCK(inp); 4144 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4145 *error = EINVAL; 4146 return (NULL); 4147 } 4148 } 4149 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4150 #ifdef SCTP_DEBUG 4151 if (firstaddr) { 4152 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4153 switch (firstaddr->sa_family) { 4154 #ifdef INET 4155 case AF_INET: 4156 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4157 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4158 break; 4159 #endif 4160 #ifdef INET6 4161 case AF_INET6: 4162 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4163 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4164 break; 4165 #endif 4166 default: 4167 break; 4168 } 4169 } else { 4170 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4171 } 4172 #endif /* SCTP_DEBUG */ 4173 switch (firstaddr->sa_family) { 4174 #ifdef INET 4175 case AF_INET: 4176 { 4177 struct sockaddr_in *sin; 4178 4179 sin = (struct sockaddr_in *)firstaddr; 4180 if ((ntohs(sin->sin_port) == 0) || 4181 (sin->sin_addr.s_addr == INADDR_ANY) || 4182 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4183 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4184 /* Invalid address */ 4185 SCTP_INP_RUNLOCK(inp); 4186 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4187 *error = EINVAL; 4188 return (NULL); 4189 } 4190 rport = sin->sin_port; 4191 break; 4192 } 4193 #endif 4194 #ifdef INET6 4195 case AF_INET6: 4196 { 4197 struct sockaddr_in6 *sin6; 4198 4199 sin6 = (struct sockaddr_in6 *)firstaddr; 4200 if ((ntohs(sin6->sin6_port) == 0) || 4201 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4202 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4203 /* Invalid address */ 4204 SCTP_INP_RUNLOCK(inp); 4205 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4206 *error = EINVAL; 4207 return (NULL); 4208 } 4209 rport = sin6->sin6_port; 4210 break; 4211 } 4212 #endif 4213 default: 4214 /* not supported family type */ 4215 SCTP_INP_RUNLOCK(inp); 4216 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4217 *error = EINVAL; 4218 return (NULL); 4219 } 4220 SCTP_INP_RUNLOCK(inp); 4221 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4222 /* 4223 * If you have not performed a bind, then we need to do the 4224 * ephemeral bind for you. 4225 */ 4226 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4227 (struct sockaddr *)NULL, 4228 (struct sctp_ifa *)NULL, 4229 p 4230 ))) { 4231 /* bind error, probably perm */ 4232 *error = err; 4233 return (NULL); 4234 } 4235 } 4236 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4237 if (stcb == NULL) { 4238 /* out of memory? */ 4239 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4240 *error = ENOMEM; 4241 return (NULL); 4242 } 4243 SCTP_INCR_ASOC_COUNT(); 4244 4245 bzero(stcb, sizeof(*stcb)); 4246 asoc = &stcb->asoc; 4247 4248 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4249 SCTP_TCB_LOCK_INIT(stcb); 4250 SCTP_TCB_SEND_LOCK_INIT(stcb); 4251 stcb->rport = rport; 4252 /* setup back pointer's */ 4253 stcb->sctp_ep = inp; 4254 stcb->sctp_socket = inp->sctp_socket; 4255 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4256 /* failed */ 4257 SCTP_TCB_LOCK_DESTROY(stcb); 4258 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4259 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4260 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4261 SCTP_DECR_ASOC_COUNT(); 4262 *error = err; 4263 return (NULL); 4264 } 4265 /* and the port */ 4266 SCTP_INP_INFO_WLOCK(); 4267 SCTP_INP_WLOCK(inp); 4268 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4269 /* inpcb freed while alloc going on */ 4270 SCTP_TCB_LOCK_DESTROY(stcb); 4271 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4272 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4273 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4274 SCTP_INP_WUNLOCK(inp); 4275 SCTP_INP_INFO_WUNLOCK(); 4276 SCTP_DECR_ASOC_COUNT(); 4277 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4278 *error = EINVAL; 4279 return (NULL); 4280 } 4281 SCTP_TCB_LOCK(stcb); 4282 4283 /* now that my_vtag is set, add it to the hash */ 4284 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4285 /* put it in the bucket in the vtag hash of assoc's for the system */ 4286 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4287 SCTP_INP_INFO_WUNLOCK(); 4288 4289 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4290 /* failure.. memory error? */ 4291 if (asoc->strmout) { 4292 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4293 asoc->strmout = NULL; 4294 } 4295 if (asoc->mapping_array) { 4296 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4297 asoc->mapping_array = NULL; 4298 } 4299 if (asoc->nr_mapping_array) { 4300 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4301 asoc->nr_mapping_array = NULL; 4302 } 4303 SCTP_DECR_ASOC_COUNT(); 4304 SCTP_TCB_UNLOCK(stcb); 4305 SCTP_TCB_LOCK_DESTROY(stcb); 4306 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4307 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4308 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4309 SCTP_INP_WUNLOCK(inp); 4310 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4311 *error = ENOBUFS; 4312 return (NULL); 4313 } 4314 /* Init all the timers */ 4315 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4316 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4317 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4318 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4319 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4320 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4321 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4322 4323 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4324 /* now file the port under the hash as well */ 4325 if (inp->sctp_tcbhash != NULL) { 4326 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4327 inp->sctp_hashmark)]; 4328 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4329 } 4330 SCTP_INP_WUNLOCK(inp); 4331 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4332 return (stcb); 4333 } 4334 4335 4336 void 4337 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4338 { 4339 struct sctp_association *asoc; 4340 4341 asoc = &stcb->asoc; 4342 asoc->numnets--; 4343 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4344 if (net == asoc->primary_destination) { 4345 /* Reset primary */ 4346 struct sctp_nets *lnet; 4347 4348 lnet = TAILQ_FIRST(&asoc->nets); 4349 /* 4350 * Mobility adaptation Ideally, if deleted destination is 4351 * the primary, it becomes a fast retransmission trigger by 4352 * the subsequent SET PRIMARY. (by micchie) 4353 */ 4354 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4355 SCTP_MOBILITY_BASE) || 4356 sctp_is_mobility_feature_on(stcb->sctp_ep, 4357 SCTP_MOBILITY_FASTHANDOFF)) { 4358 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4359 if (asoc->deleted_primary != NULL) { 4360 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4361 goto out; 4362 } 4363 asoc->deleted_primary = net; 4364 atomic_add_int(&net->ref_count, 1); 4365 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4366 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4367 sctp_mobility_feature_on(stcb->sctp_ep, 4368 SCTP_MOBILITY_PRIM_DELETED); 4369 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4370 stcb->sctp_ep, stcb, NULL); 4371 } 4372 out: 4373 /* Try to find a confirmed primary */ 4374 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4375 } 4376 if (net == asoc->last_data_chunk_from) { 4377 /* Reset primary */ 4378 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4379 } 4380 if (net == asoc->last_control_chunk_from) { 4381 /* Clear net */ 4382 asoc->last_control_chunk_from = NULL; 4383 } 4384 if (net == stcb->asoc.alternate) { 4385 sctp_free_remote_addr(stcb->asoc.alternate); 4386 stcb->asoc.alternate = NULL; 4387 } 4388 sctp_free_remote_addr(net); 4389 } 4390 4391 /* 4392 * remove a remote endpoint address from an association, it will fail if the 4393 * address does not exist. 4394 */ 4395 int 4396 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4397 { 4398 /* 4399 * Here we need to remove a remote address. This is quite simple, we 4400 * first find it in the list of address for the association 4401 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4402 * on that item. Note we do not allow it to be removed if there are 4403 * no other addresses. 4404 */ 4405 struct sctp_association *asoc; 4406 struct sctp_nets *net, *nnet; 4407 4408 asoc = &stcb->asoc; 4409 4410 /* locate the address */ 4411 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4412 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4413 continue; 4414 } 4415 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4416 remaddr)) { 4417 /* we found the guy */ 4418 if (asoc->numnets < 2) { 4419 /* Must have at LEAST two remote addresses */ 4420 return (-1); 4421 } else { 4422 sctp_remove_net(stcb, net); 4423 return (0); 4424 } 4425 } 4426 } 4427 /* not found. */ 4428 return (-2); 4429 } 4430 4431 void 4432 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4433 { 4434 struct sctpvtaghead *chain; 4435 struct sctp_tagblock *twait_block; 4436 int found = 0; 4437 int i; 4438 4439 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4440 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4441 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4442 if ((twait_block->vtag_block[i].v_tag == tag) && 4443 (twait_block->vtag_block[i].lport == lport) && 4444 (twait_block->vtag_block[i].rport == rport)) { 4445 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4446 twait_block->vtag_block[i].v_tag = 0; 4447 twait_block->vtag_block[i].lport = 0; 4448 twait_block->vtag_block[i].rport = 0; 4449 found = 1; 4450 break; 4451 } 4452 } 4453 if (found) 4454 break; 4455 } 4456 } 4457 4458 int 4459 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4460 { 4461 struct sctpvtaghead *chain; 4462 struct sctp_tagblock *twait_block; 4463 int found = 0; 4464 int i; 4465 4466 SCTP_INP_INFO_WLOCK(); 4467 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4468 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4469 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4470 if ((twait_block->vtag_block[i].v_tag == tag) && 4471 (twait_block->vtag_block[i].lport == lport) && 4472 (twait_block->vtag_block[i].rport == rport)) { 4473 found = 1; 4474 break; 4475 } 4476 } 4477 if (found) 4478 break; 4479 } 4480 SCTP_INP_INFO_WUNLOCK(); 4481 return (found); 4482 } 4483 4484 4485 void 4486 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4487 { 4488 struct sctpvtaghead *chain; 4489 struct sctp_tagblock *twait_block; 4490 struct timeval now; 4491 int set, i; 4492 4493 if (time == 0) { 4494 /* Its disabled */ 4495 return; 4496 } 4497 (void)SCTP_GETTIME_TIMEVAL(&now); 4498 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4499 set = 0; 4500 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4501 /* Block(s) present, lets find space, and expire on the fly */ 4502 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4503 if ((twait_block->vtag_block[i].v_tag == 0) && 4504 !set) { 4505 twait_block->vtag_block[i].tv_sec_at_expire = 4506 now.tv_sec + time; 4507 twait_block->vtag_block[i].v_tag = tag; 4508 twait_block->vtag_block[i].lport = lport; 4509 twait_block->vtag_block[i].rport = rport; 4510 set = 1; 4511 } else if ((twait_block->vtag_block[i].v_tag) && 4512 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4513 /* Audit expires this guy */ 4514 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4515 twait_block->vtag_block[i].v_tag = 0; 4516 twait_block->vtag_block[i].lport = 0; 4517 twait_block->vtag_block[i].rport = 0; 4518 if (set == 0) { 4519 /* Reuse it for my new tag */ 4520 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4521 twait_block->vtag_block[i].v_tag = tag; 4522 twait_block->vtag_block[i].lport = lport; 4523 twait_block->vtag_block[i].rport = rport; 4524 set = 1; 4525 } 4526 } 4527 } 4528 if (set) { 4529 /* 4530 * We only do up to the block where we can place our 4531 * tag for audits 4532 */ 4533 break; 4534 } 4535 } 4536 /* Need to add a new block to chain */ 4537 if (!set) { 4538 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4539 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4540 if (twait_block == NULL) { 4541 #ifdef INVARIANTS 4542 panic("Can not alloc tagblock"); 4543 #endif 4544 return; 4545 } 4546 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4547 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4548 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4549 twait_block->vtag_block[0].v_tag = tag; 4550 twait_block->vtag_block[0].lport = lport; 4551 twait_block->vtag_block[0].rport = rport; 4552 } 4553 } 4554 4555 4556 4557 /*- 4558 * Free the association after un-hashing the remote port. This 4559 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4560 * expect that the input to this function IS a locked TCB. 4561 * It will return 0, if it did NOT destroy the association (instead 4562 * it unlocks it. It will return NON-zero if it either destroyed the 4563 * association OR the association is already destroyed. 4564 */ 4565 int 4566 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4567 { 4568 int i; 4569 struct sctp_association *asoc; 4570 struct sctp_nets *net, *nnet; 4571 struct sctp_laddr *laddr, *naddr; 4572 struct sctp_tmit_chunk *chk, *nchk; 4573 struct sctp_asconf_addr *aparam, *naparam; 4574 struct sctp_asconf_ack *aack, *naack; 4575 struct sctp_stream_reset_list *strrst, *nstrrst; 4576 struct sctp_queued_to_read *sq, *nsq; 4577 struct sctp_stream_queue_pending *sp, *nsp; 4578 sctp_sharedkey_t *shared_key, *nshared_key; 4579 struct socket *so; 4580 4581 /* first, lets purge the entry from the hash table. */ 4582 4583 #ifdef SCTP_LOG_CLOSING 4584 sctp_log_closing(inp, stcb, 6); 4585 #endif 4586 if (stcb->asoc.state == 0) { 4587 #ifdef SCTP_LOG_CLOSING 4588 sctp_log_closing(inp, NULL, 7); 4589 #endif 4590 /* there is no asoc, really TSNH :-0 */ 4591 return (1); 4592 } 4593 if (stcb->asoc.alternate) { 4594 sctp_free_remote_addr(stcb->asoc.alternate); 4595 stcb->asoc.alternate = NULL; 4596 } 4597 /* TEMP CODE */ 4598 if (stcb->freed_from_where == 0) { 4599 /* Only record the first place free happened from */ 4600 stcb->freed_from_where = from_location; 4601 } 4602 /* TEMP CODE */ 4603 4604 asoc = &stcb->asoc; 4605 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4606 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4607 /* nothing around */ 4608 so = NULL; 4609 else 4610 so = inp->sctp_socket; 4611 4612 /* 4613 * We used timer based freeing if a reader or writer is in the way. 4614 * So we first check if we are actually being called from a timer, 4615 * if so we abort early if a reader or writer is still in the way. 4616 */ 4617 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4618 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4619 /* 4620 * is it the timer driving us? if so are the reader/writers 4621 * gone? 4622 */ 4623 if (stcb->asoc.refcnt) { 4624 /* nope, reader or writer in the way */ 4625 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4626 /* no asoc destroyed */ 4627 SCTP_TCB_UNLOCK(stcb); 4628 #ifdef SCTP_LOG_CLOSING 4629 sctp_log_closing(inp, stcb, 8); 4630 #endif 4631 return (0); 4632 } 4633 } 4634 /* now clean up any other timers */ 4635 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4636 asoc->dack_timer.self = NULL; 4637 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4638 /*- 4639 * For stream reset we don't blast this unless 4640 * it is a str-reset timer, it might be the 4641 * free-asoc timer which we DON'T want to 4642 * disturb. 4643 */ 4644 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4645 asoc->strreset_timer.self = NULL; 4646 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4647 asoc->asconf_timer.self = NULL; 4648 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4649 asoc->autoclose_timer.self = NULL; 4650 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4651 asoc->shut_guard_timer.self = NULL; 4652 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4653 asoc->delayed_event_timer.self = NULL; 4654 /* Mobility adaptation */ 4655 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4656 asoc->delete_prim_timer.self = NULL; 4657 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4658 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4659 net->rxt_timer.self = NULL; 4660 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4661 net->pmtu_timer.self = NULL; 4662 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4663 net->hb_timer.self = NULL; 4664 } 4665 /* Now the read queue needs to be cleaned up (only once) */ 4666 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4667 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4668 SCTP_INP_READ_LOCK(inp); 4669 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4670 if (sq->stcb == stcb) { 4671 sq->do_not_ref_stcb = 1; 4672 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4673 /* 4674 * If there is no end, there never will be 4675 * now. 4676 */ 4677 if (sq->end_added == 0) { 4678 /* Held for PD-API clear that. */ 4679 sq->pdapi_aborted = 1; 4680 sq->held_length = 0; 4681 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4682 /* 4683 * Need to add a PD-API 4684 * aborted indication. 4685 * Setting the control_pdapi 4686 * assures that it will be 4687 * added right after this 4688 * msg. 4689 */ 4690 uint32_t strseq; 4691 4692 stcb->asoc.control_pdapi = sq; 4693 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4694 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4695 stcb, 4696 SCTP_PARTIAL_DELIVERY_ABORTED, 4697 (void *)&strseq, 4698 SCTP_SO_LOCKED); 4699 stcb->asoc.control_pdapi = NULL; 4700 } 4701 } 4702 /* Add an end to wake them */ 4703 sq->end_added = 1; 4704 } 4705 } 4706 SCTP_INP_READ_UNLOCK(inp); 4707 if (stcb->block_entry) { 4708 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4709 stcb->block_entry->error = ECONNRESET; 4710 stcb->block_entry = NULL; 4711 } 4712 } 4713 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4714 /* 4715 * Someone holds a reference OR the socket is unaccepted 4716 * yet. 4717 */ 4718 if ((stcb->asoc.refcnt) || 4719 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4720 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4721 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4722 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4723 } 4724 SCTP_TCB_UNLOCK(stcb); 4725 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4726 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4727 /* nothing around */ 4728 so = NULL; 4729 if (so) { 4730 /* Wake any reader/writers */ 4731 sctp_sorwakeup(inp, so); 4732 sctp_sowwakeup(inp, so); 4733 } 4734 #ifdef SCTP_LOG_CLOSING 4735 sctp_log_closing(inp, stcb, 9); 4736 #endif 4737 /* no asoc destroyed */ 4738 return (0); 4739 } 4740 #ifdef SCTP_LOG_CLOSING 4741 sctp_log_closing(inp, stcb, 10); 4742 #endif 4743 /* 4744 * When I reach here, no others want to kill the assoc yet.. and I 4745 * own the lock. Now its possible an abort comes in when I do the 4746 * lock exchange below to grab all the locks to do the final take 4747 * out. to prevent this we increment the count, which will start a 4748 * timer and blow out above thus assuring us that we hold exclusive 4749 * killing of the asoc. Note that after getting back the TCB lock we 4750 * will go ahead and increment the counter back up and stop any 4751 * timer a passing stranger may have started :-S 4752 */ 4753 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4754 atomic_add_int(&stcb->asoc.refcnt, 1); 4755 4756 SCTP_TCB_UNLOCK(stcb); 4757 SCTP_INP_INFO_WLOCK(); 4758 SCTP_INP_WLOCK(inp); 4759 SCTP_TCB_LOCK(stcb); 4760 } 4761 /* Double check the GONE flag */ 4762 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4763 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4764 /* nothing around */ 4765 so = NULL; 4766 4767 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4768 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4769 /* 4770 * For TCP type we need special handling when we are 4771 * connected. We also include the peel'ed off ones to. 4772 */ 4773 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4774 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4775 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4776 if (so) { 4777 SOCK_LOCK(so); 4778 if (so->so_rcv.sb_cc == 0) { 4779 so->so_state &= ~(SS_ISCONNECTING | 4780 SS_ISDISCONNECTING | 4781 SS_ISCONFIRMING | 4782 SS_ISCONNECTED); 4783 } 4784 socantrcvmore_locked(so); 4785 sctp_sowwakeup(inp, so); 4786 sctp_sorwakeup(inp, so); 4787 SCTP_SOWAKEUP(so); 4788 } 4789 } 4790 } 4791 /* 4792 * Make it invalid too, that way if its about to run it will abort 4793 * and return. 4794 */ 4795 /* re-increment the lock */ 4796 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4797 atomic_add_int(&stcb->asoc.refcnt, -1); 4798 } 4799 if (stcb->asoc.refcnt) { 4800 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4801 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4802 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4803 SCTP_INP_INFO_WUNLOCK(); 4804 SCTP_INP_WUNLOCK(inp); 4805 } 4806 SCTP_TCB_UNLOCK(stcb); 4807 return (0); 4808 } 4809 asoc->state = 0; 4810 if (inp->sctp_tcbhash) { 4811 LIST_REMOVE(stcb, sctp_tcbhash); 4812 } 4813 if (stcb->asoc.in_asocid_hash) { 4814 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4815 } 4816 /* Now lets remove it from the list of ALL associations in the EP */ 4817 LIST_REMOVE(stcb, sctp_tcblist); 4818 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4819 SCTP_INP_INCR_REF(inp); 4820 SCTP_INP_WUNLOCK(inp); 4821 } 4822 /* pull from vtag hash */ 4823 LIST_REMOVE(stcb, sctp_asocs); 4824 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4825 inp->sctp_lport, stcb->rport); 4826 4827 /* 4828 * Now restop the timers to be sure this is paranoia at is finest! 4829 */ 4830 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4831 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4832 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4833 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4834 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4835 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4836 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4837 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4838 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4839 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4840 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4841 } 4842 4843 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4844 /* 4845 * The chunk lists and such SHOULD be empty but we check them just 4846 * in case. 4847 */ 4848 /* anything on the wheel needs to be removed */ 4849 for (i = 0; i < asoc->streamoutcnt; i++) { 4850 struct sctp_stream_out *outs; 4851 4852 outs = &asoc->strmout[i]; 4853 /* now clean up any chunks here */ 4854 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4855 TAILQ_REMOVE(&outs->outqueue, sp, next); 4856 sctp_free_spbufspace(stcb, asoc, sp); 4857 if (sp->data) { 4858 if (so) { 4859 /* Still an open socket - report */ 4860 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4861 0, (void *)sp, SCTP_SO_LOCKED); 4862 } 4863 if (sp->data) { 4864 sctp_m_freem(sp->data); 4865 sp->data = NULL; 4866 sp->tail_mbuf = NULL; 4867 sp->length = 0; 4868 } 4869 } 4870 if (sp->net) { 4871 sctp_free_remote_addr(sp->net); 4872 sp->net = NULL; 4873 } 4874 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4875 } 4876 } 4877 /* sa_ignore FREED_MEMORY */ 4878 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4879 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4880 SCTP_FREE(strrst, SCTP_M_STRESET); 4881 } 4882 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4883 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4884 if (sq->data) { 4885 sctp_m_freem(sq->data); 4886 sq->data = NULL; 4887 } 4888 sctp_free_remote_addr(sq->whoFrom); 4889 sq->whoFrom = NULL; 4890 sq->stcb = NULL; 4891 /* Free the ctl entry */ 4892 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4893 SCTP_DECR_READQ_COUNT(); 4894 /* sa_ignore FREED_MEMORY */ 4895 } 4896 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4897 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4898 if (chk->data) { 4899 sctp_m_freem(chk->data); 4900 chk->data = NULL; 4901 } 4902 if (chk->holds_key_ref) 4903 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4904 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4905 SCTP_DECR_CHK_COUNT(); 4906 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4907 asoc->free_chunk_cnt--; 4908 /* sa_ignore FREED_MEMORY */ 4909 } 4910 /* pending send queue SHOULD be empty */ 4911 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4912 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4913 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4914 #ifdef INVARIANTS 4915 } else { 4916 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4917 #endif 4918 } 4919 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4920 if (chk->data) { 4921 if (so) { 4922 /* Still a socket? */ 4923 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4924 0, chk, SCTP_SO_LOCKED); 4925 } 4926 if (chk->data) { 4927 sctp_m_freem(chk->data); 4928 chk->data = NULL; 4929 } 4930 } 4931 if (chk->holds_key_ref) 4932 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4933 if (chk->whoTo) { 4934 sctp_free_remote_addr(chk->whoTo); 4935 chk->whoTo = NULL; 4936 } 4937 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4938 SCTP_DECR_CHK_COUNT(); 4939 /* sa_ignore FREED_MEMORY */ 4940 } 4941 /* sent queue SHOULD be empty */ 4942 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4943 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 4944 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4945 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4946 #ifdef INVARIANTS 4947 } else { 4948 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4949 #endif 4950 } 4951 } 4952 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4953 if (chk->data) { 4954 if (so) { 4955 /* Still a socket? */ 4956 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 4957 0, chk, SCTP_SO_LOCKED); 4958 } 4959 if (chk->data) { 4960 sctp_m_freem(chk->data); 4961 chk->data = NULL; 4962 } 4963 } 4964 if (chk->holds_key_ref) 4965 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4966 sctp_free_remote_addr(chk->whoTo); 4967 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4968 SCTP_DECR_CHK_COUNT(); 4969 /* sa_ignore FREED_MEMORY */ 4970 } 4971 #ifdef INVARIANTS 4972 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 4973 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 4974 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 4975 } 4976 } 4977 #endif 4978 /* control queue MAY not be empty */ 4979 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 4980 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4981 if (chk->data) { 4982 sctp_m_freem(chk->data); 4983 chk->data = NULL; 4984 } 4985 if (chk->holds_key_ref) 4986 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4987 sctp_free_remote_addr(chk->whoTo); 4988 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4989 SCTP_DECR_CHK_COUNT(); 4990 /* sa_ignore FREED_MEMORY */ 4991 } 4992 /* ASCONF queue MAY not be empty */ 4993 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 4994 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4995 if (chk->data) { 4996 sctp_m_freem(chk->data); 4997 chk->data = NULL; 4998 } 4999 if (chk->holds_key_ref) 5000 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5001 sctp_free_remote_addr(chk->whoTo); 5002 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5003 SCTP_DECR_CHK_COUNT(); 5004 /* sa_ignore FREED_MEMORY */ 5005 } 5006 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5007 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5008 if (chk->data) { 5009 sctp_m_freem(chk->data); 5010 chk->data = NULL; 5011 } 5012 if (chk->holds_key_ref) 5013 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5014 sctp_free_remote_addr(chk->whoTo); 5015 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5016 SCTP_DECR_CHK_COUNT(); 5017 /* sa_ignore FREED_MEMORY */ 5018 } 5019 5020 if (asoc->mapping_array) { 5021 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5022 asoc->mapping_array = NULL; 5023 } 5024 if (asoc->nr_mapping_array) { 5025 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5026 asoc->nr_mapping_array = NULL; 5027 } 5028 /* the stream outs */ 5029 if (asoc->strmout) { 5030 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5031 asoc->strmout = NULL; 5032 } 5033 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5034 if (asoc->strmin) { 5035 struct sctp_queued_to_read *ctl, *nctl; 5036 5037 for (i = 0; i < asoc->streamincnt; i++) { 5038 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5039 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5040 sctp_free_remote_addr(ctl->whoFrom); 5041 if (ctl->data) { 5042 sctp_m_freem(ctl->data); 5043 ctl->data = NULL; 5044 } 5045 /* 5046 * We don't free the address here since all 5047 * the net's were freed above. 5048 */ 5049 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5050 SCTP_DECR_READQ_COUNT(); 5051 } 5052 } 5053 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5054 asoc->strmin = NULL; 5055 } 5056 asoc->streamincnt = 0; 5057 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5058 #ifdef INVARIANTS 5059 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5060 panic("no net's left alloc'ed, or list points to itself"); 5061 } 5062 #endif 5063 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5064 sctp_free_remote_addr(net); 5065 } 5066 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5067 /* sa_ignore FREED_MEMORY */ 5068 sctp_remove_laddr(laddr); 5069 } 5070 5071 /* pending asconf (address) parameters */ 5072 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5073 /* sa_ignore FREED_MEMORY */ 5074 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5075 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5076 } 5077 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5078 /* sa_ignore FREED_MEMORY */ 5079 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5080 if (aack->data != NULL) { 5081 sctp_m_freem(aack->data); 5082 } 5083 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5084 } 5085 /* clean up auth stuff */ 5086 if (asoc->local_hmacs) 5087 sctp_free_hmaclist(asoc->local_hmacs); 5088 if (asoc->peer_hmacs) 5089 sctp_free_hmaclist(asoc->peer_hmacs); 5090 5091 if (asoc->local_auth_chunks) 5092 sctp_free_chunklist(asoc->local_auth_chunks); 5093 if (asoc->peer_auth_chunks) 5094 sctp_free_chunklist(asoc->peer_auth_chunks); 5095 5096 sctp_free_authinfo(&asoc->authinfo); 5097 5098 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5099 LIST_REMOVE(shared_key, next); 5100 sctp_free_sharedkey(shared_key); 5101 /* sa_ignore FREED_MEMORY */ 5102 } 5103 5104 /* Insert new items here :> */ 5105 5106 /* Get rid of LOCK */ 5107 SCTP_TCB_UNLOCK(stcb); 5108 SCTP_TCB_LOCK_DESTROY(stcb); 5109 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5110 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5111 SCTP_INP_INFO_WUNLOCK(); 5112 SCTP_INP_RLOCK(inp); 5113 } 5114 #ifdef SCTP_TRACK_FREED_ASOCS 5115 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5116 /* now clean up the tasoc itself */ 5117 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5118 SCTP_DECR_ASOC_COUNT(); 5119 } else { 5120 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5121 } 5122 #else 5123 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5124 SCTP_DECR_ASOC_COUNT(); 5125 #endif 5126 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5127 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5128 /* 5129 * If its NOT the inp_free calling us AND sctp_close 5130 * as been called, we call back... 5131 */ 5132 SCTP_INP_RUNLOCK(inp); 5133 /* 5134 * This will start the kill timer (if we are the 5135 * last one) since we hold an increment yet. But 5136 * this is the only safe way to do this since 5137 * otherwise if the socket closes at the same time 5138 * we are here we might collide in the cleanup. 5139 */ 5140 sctp_inpcb_free(inp, 5141 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5142 SCTP_CALLED_DIRECTLY_NOCMPSET); 5143 SCTP_INP_DECR_REF(inp); 5144 goto out_of; 5145 } else { 5146 /* The socket is still open. */ 5147 SCTP_INP_DECR_REF(inp); 5148 } 5149 } 5150 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5151 SCTP_INP_RUNLOCK(inp); 5152 } 5153 out_of: 5154 /* destroyed the asoc */ 5155 #ifdef SCTP_LOG_CLOSING 5156 sctp_log_closing(inp, NULL, 11); 5157 #endif 5158 return (1); 5159 } 5160 5161 5162 5163 /* 5164 * determine if a destination is "reachable" based upon the addresses bound 5165 * to the current endpoint (e.g. only v4 or v6 currently bound) 5166 */ 5167 /* 5168 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5169 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5170 * types bound as its endpoint 5171 */ 5172 int 5173 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5174 { 5175 struct sctp_inpcb *inp; 5176 int answer; 5177 5178 /* 5179 * No locks here, the TCB, in all cases is already locked and an 5180 * assoc is up. There is either a INP lock by the caller applied (in 5181 * asconf case when deleting an address) or NOT in the HB case, 5182 * however if HB then the INP increment is up and the INP will not 5183 * be removed (on top of the fact that we have a TCB lock). So we 5184 * only want to read the sctp_flags, which is either bound-all or 5185 * not.. no protection needed since once an assoc is up you can't be 5186 * changing your binding. 5187 */ 5188 inp = stcb->sctp_ep; 5189 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5190 /* if bound all, destination is not restricted */ 5191 /* 5192 * RRS: Question during lock work: Is this correct? If you 5193 * are bound-all you still might need to obey the V4--V6 5194 * flags??? IMO this bound-all stuff needs to be removed! 5195 */ 5196 return (1); 5197 } 5198 /* NOTE: all "scope" checks are done when local addresses are added */ 5199 switch (destaddr->sa_family) { 5200 #ifdef INET6 5201 case AF_INET6: 5202 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5203 break; 5204 #endif 5205 #ifdef INET 5206 case AF_INET: 5207 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5208 break; 5209 #endif 5210 default: 5211 /* invalid family, so it's unreachable */ 5212 answer = 0; 5213 break; 5214 } 5215 return (answer); 5216 } 5217 5218 /* 5219 * update the inp_vflags on an endpoint 5220 */ 5221 static void 5222 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5223 { 5224 struct sctp_laddr *laddr; 5225 5226 /* first clear the flag */ 5227 inp->ip_inp.inp.inp_vflag = 0; 5228 /* set the flag based on addresses on the ep list */ 5229 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5230 if (laddr->ifa == NULL) { 5231 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5232 __FUNCTION__); 5233 continue; 5234 } 5235 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5236 continue; 5237 } 5238 switch (laddr->ifa->address.sa.sa_family) { 5239 #ifdef INET6 5240 case AF_INET6: 5241 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5242 break; 5243 #endif 5244 #ifdef INET 5245 case AF_INET: 5246 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5247 break; 5248 #endif 5249 default: 5250 break; 5251 } 5252 } 5253 } 5254 5255 /* 5256 * Add the address to the endpoint local address list There is nothing to be 5257 * done if we are bound to all addresses 5258 */ 5259 void 5260 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5261 { 5262 struct sctp_laddr *laddr; 5263 int fnd, error = 0; 5264 5265 fnd = 0; 5266 5267 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5268 /* You are already bound to all. You have it already */ 5269 return; 5270 } 5271 #ifdef INET6 5272 if (ifa->address.sa.sa_family == AF_INET6) { 5273 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5274 /* Can't bind a non-useable addr. */ 5275 return; 5276 } 5277 } 5278 #endif 5279 /* first, is it already present? */ 5280 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5281 if (laddr->ifa == ifa) { 5282 fnd = 1; 5283 break; 5284 } 5285 } 5286 5287 if (fnd == 0) { 5288 /* Not in the ep list */ 5289 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5290 if (error != 0) 5291 return; 5292 inp->laddr_count++; 5293 /* update inp_vflag flags */ 5294 switch (ifa->address.sa.sa_family) { 5295 #ifdef INET6 5296 case AF_INET6: 5297 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5298 break; 5299 #endif 5300 #ifdef INET 5301 case AF_INET: 5302 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5303 break; 5304 #endif 5305 default: 5306 break; 5307 } 5308 } 5309 return; 5310 } 5311 5312 5313 /* 5314 * select a new (hopefully reachable) destination net (should only be used 5315 * when we deleted an ep addr that is the only usable source address to reach 5316 * the destination net) 5317 */ 5318 static void 5319 sctp_select_primary_destination(struct sctp_tcb *stcb) 5320 { 5321 struct sctp_nets *net; 5322 5323 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5324 /* for now, we'll just pick the first reachable one we find */ 5325 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5326 continue; 5327 if (sctp_destination_is_reachable(stcb, 5328 (struct sockaddr *)&net->ro._l_addr)) { 5329 /* found a reachable destination */ 5330 stcb->asoc.primary_destination = net; 5331 } 5332 } 5333 /* I can't there from here! ...we're gonna die shortly... */ 5334 } 5335 5336 5337 /* 5338 * Delete the address from the endpoint local address list There is nothing 5339 * to be done if we are bound to all addresses 5340 */ 5341 void 5342 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5343 { 5344 struct sctp_laddr *laddr; 5345 int fnd; 5346 5347 fnd = 0; 5348 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5349 /* You are already bound to all. You have it already */ 5350 return; 5351 } 5352 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5353 if (laddr->ifa == ifa) { 5354 fnd = 1; 5355 break; 5356 } 5357 } 5358 if (fnd && (inp->laddr_count < 2)) { 5359 /* can't delete unless there are at LEAST 2 addresses */ 5360 return; 5361 } 5362 if (fnd) { 5363 /* 5364 * clean up any use of this address go through our 5365 * associations and clear any last_used_address that match 5366 * this one for each assoc, see if a new primary_destination 5367 * is needed 5368 */ 5369 struct sctp_tcb *stcb; 5370 5371 /* clean up "next_addr_touse" */ 5372 if (inp->next_addr_touse == laddr) 5373 /* delete this address */ 5374 inp->next_addr_touse = NULL; 5375 5376 /* clean up "last_used_address" */ 5377 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5378 struct sctp_nets *net; 5379 5380 SCTP_TCB_LOCK(stcb); 5381 if (stcb->asoc.last_used_address == laddr) 5382 /* delete this address */ 5383 stcb->asoc.last_used_address = NULL; 5384 /* 5385 * Now spin through all the nets and purge any ref 5386 * to laddr 5387 */ 5388 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5389 if (net->ro._s_addr && 5390 (net->ro._s_addr->ifa == laddr->ifa)) { 5391 /* Yep, purge src address selected */ 5392 sctp_rtentry_t *rt; 5393 5394 /* delete this address if cached */ 5395 rt = net->ro.ro_rt; 5396 if (rt != NULL) { 5397 RTFREE(rt); 5398 net->ro.ro_rt = NULL; 5399 } 5400 sctp_free_ifa(net->ro._s_addr); 5401 net->ro._s_addr = NULL; 5402 net->src_addr_selected = 0; 5403 } 5404 } 5405 SCTP_TCB_UNLOCK(stcb); 5406 } /* for each tcb */ 5407 /* remove it from the ep list */ 5408 sctp_remove_laddr(laddr); 5409 inp->laddr_count--; 5410 /* update inp_vflag flags */ 5411 sctp_update_ep_vflag(inp); 5412 } 5413 return; 5414 } 5415 5416 /* 5417 * Add the address to the TCB local address restricted list. 5418 * This is a "pending" address list (eg. addresses waiting for an 5419 * ASCONF-ACK response) and cannot be used as a valid source address. 5420 */ 5421 void 5422 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5423 { 5424 struct sctp_laddr *laddr; 5425 struct sctpladdr *list; 5426 5427 /* 5428 * Assumes TCB is locked.. and possibly the INP. May need to 5429 * confirm/fix that if we need it and is not the case. 5430 */ 5431 list = &stcb->asoc.sctp_restricted_addrs; 5432 5433 #ifdef INET6 5434 if (ifa->address.sa.sa_family == AF_INET6) { 5435 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5436 /* Can't bind a non-existent addr. */ 5437 return; 5438 } 5439 } 5440 #endif 5441 /* does the address already exist? */ 5442 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5443 if (laddr->ifa == ifa) { 5444 return; 5445 } 5446 } 5447 5448 /* add to the list */ 5449 (void)sctp_insert_laddr(list, ifa, 0); 5450 return; 5451 } 5452 5453 /* 5454 * insert an laddr entry with the given ifa for the desired list 5455 */ 5456 int 5457 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5458 { 5459 struct sctp_laddr *laddr; 5460 5461 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5462 if (laddr == NULL) { 5463 /* out of memory? */ 5464 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5465 return (EINVAL); 5466 } 5467 SCTP_INCR_LADDR_COUNT(); 5468 bzero(laddr, sizeof(*laddr)); 5469 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5470 laddr->ifa = ifa; 5471 laddr->action = act; 5472 atomic_add_int(&ifa->refcount, 1); 5473 /* insert it */ 5474 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5475 5476 return (0); 5477 } 5478 5479 /* 5480 * Remove an laddr entry from the local address list (on an assoc) 5481 */ 5482 void 5483 sctp_remove_laddr(struct sctp_laddr *laddr) 5484 { 5485 5486 /* remove from the list */ 5487 LIST_REMOVE(laddr, sctp_nxt_addr); 5488 sctp_free_ifa(laddr->ifa); 5489 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5490 SCTP_DECR_LADDR_COUNT(); 5491 } 5492 5493 /* 5494 * Remove a local address from the TCB local address restricted list 5495 */ 5496 void 5497 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5498 { 5499 struct sctp_inpcb *inp; 5500 struct sctp_laddr *laddr; 5501 5502 /* 5503 * This is called by asconf work. It is assumed that a) The TCB is 5504 * locked and b) The INP is locked. This is true in as much as I can 5505 * trace through the entry asconf code where I did these locks. 5506 * Again, the ASCONF code is a bit different in that it does lock 5507 * the INP during its work often times. This must be since we don't 5508 * want other proc's looking up things while what they are looking 5509 * up is changing :-D 5510 */ 5511 5512 inp = stcb->sctp_ep; 5513 /* if subset bound and don't allow ASCONF's, can't delete last */ 5514 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5515 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5516 if (stcb->sctp_ep->laddr_count < 2) { 5517 /* can't delete last address */ 5518 return; 5519 } 5520 } 5521 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5522 /* remove the address if it exists */ 5523 if (laddr->ifa == NULL) 5524 continue; 5525 if (laddr->ifa == ifa) { 5526 sctp_remove_laddr(laddr); 5527 return; 5528 } 5529 } 5530 5531 /* address not found! */ 5532 return; 5533 } 5534 5535 /* 5536 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5537 */ 5538 /* sysctl */ 5539 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5540 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5541 5542 5543 5544 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5545 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5546 int *sctp_cpuarry = NULL; 5547 void 5548 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5549 { 5550 /* Queue a packet to a processor for the specified core */ 5551 struct sctp_mcore_queue *qent; 5552 struct sctp_mcore_ctrl *wkq; 5553 int need_wake = 0; 5554 5555 if (sctp_mcore_workers == NULL) { 5556 /* Something went way bad during setup */ 5557 sctp_input_with_port(m, off, 0); 5558 return; 5559 } 5560 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5561 (sizeof(struct sctp_mcore_queue)), 5562 SCTP_M_MCORE); 5563 if (qent == NULL) { 5564 /* This is trouble */ 5565 sctp_input_with_port(m, off, 0); 5566 return; 5567 } 5568 qent->vn = curvnet; 5569 qent->m = m; 5570 qent->off = off; 5571 qent->v6 = 0; 5572 wkq = &sctp_mcore_workers[cpu_to_use]; 5573 SCTP_MCORE_QLOCK(wkq); 5574 5575 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5576 if (wkq->running == 0) { 5577 need_wake = 1; 5578 } 5579 SCTP_MCORE_QUNLOCK(wkq); 5580 if (need_wake) { 5581 wakeup(&wkq->running); 5582 } 5583 } 5584 5585 static void 5586 sctp_mcore_thread(void *arg) 5587 { 5588 5589 struct sctp_mcore_ctrl *wkq; 5590 struct sctp_mcore_queue *qent; 5591 5592 wkq = (struct sctp_mcore_ctrl *)arg; 5593 struct mbuf *m; 5594 int off, v6; 5595 5596 /* Wait for first tickle */ 5597 SCTP_MCORE_LOCK(wkq); 5598 wkq->running = 0; 5599 msleep(&wkq->running, 5600 &wkq->core_mtx, 5601 0, "wait for pkt", 0); 5602 SCTP_MCORE_UNLOCK(wkq); 5603 5604 /* Bind to our cpu */ 5605 thread_lock(curthread); 5606 sched_bind(curthread, wkq->cpuid); 5607 thread_unlock(curthread); 5608 5609 /* Now lets start working */ 5610 SCTP_MCORE_LOCK(wkq); 5611 /* Now grab lock and go */ 5612 for (;;) { 5613 SCTP_MCORE_QLOCK(wkq); 5614 skip_sleep: 5615 wkq->running = 1; 5616 qent = TAILQ_FIRST(&wkq->que); 5617 if (qent) { 5618 TAILQ_REMOVE(&wkq->que, qent, next); 5619 SCTP_MCORE_QUNLOCK(wkq); 5620 CURVNET_SET(qent->vn); 5621 m = qent->m; 5622 off = qent->off; 5623 v6 = qent->v6; 5624 SCTP_FREE(qent, SCTP_M_MCORE); 5625 if (v6 == 0) { 5626 sctp_input_with_port(m, off, 0); 5627 } else { 5628 SCTP_PRINTF("V6 not yet supported\n"); 5629 sctp_m_freem(m); 5630 } 5631 CURVNET_RESTORE(); 5632 SCTP_MCORE_QLOCK(wkq); 5633 } 5634 wkq->running = 0; 5635 if (!TAILQ_EMPTY(&wkq->que)) { 5636 goto skip_sleep; 5637 } 5638 SCTP_MCORE_QUNLOCK(wkq); 5639 msleep(&wkq->running, 5640 &wkq->core_mtx, 5641 0, "wait for pkt", 0); 5642 } 5643 } 5644 5645 static void 5646 sctp_startup_mcore_threads(void) 5647 { 5648 int i, cpu; 5649 5650 if (mp_ncpus == 1) 5651 return; 5652 5653 if (sctp_mcore_workers != NULL) { 5654 /* 5655 * Already been here in some previous vnet? 5656 */ 5657 return; 5658 } 5659 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5660 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5661 SCTP_M_MCORE); 5662 if (sctp_mcore_workers == NULL) { 5663 /* TSNH I hope */ 5664 return; 5665 } 5666 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5667 sizeof(struct sctp_mcore_ctrl))); 5668 /* Init the structures */ 5669 for (i = 0; i <= mp_maxid; i++) { 5670 TAILQ_INIT(&sctp_mcore_workers[i].que); 5671 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5672 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5673 sctp_mcore_workers[i].cpuid = i; 5674 } 5675 if (sctp_cpuarry == NULL) { 5676 SCTP_MALLOC(sctp_cpuarry, int *, 5677 (mp_ncpus * sizeof(int)), 5678 SCTP_M_MCORE); 5679 i = 0; 5680 CPU_FOREACH(cpu) { 5681 sctp_cpuarry[i] = cpu; 5682 i++; 5683 } 5684 } 5685 /* Now start them all */ 5686 CPU_FOREACH(cpu) { 5687 (void)kproc_create(sctp_mcore_thread, 5688 (void *)&sctp_mcore_workers[cpu], 5689 &sctp_mcore_workers[cpu].thread_proc, 5690 RFPROC, 5691 SCTP_KTHREAD_PAGES, 5692 SCTP_MCORE_NAME); 5693 5694 } 5695 } 5696 5697 #endif 5698 5699 void 5700 sctp_pcb_init() 5701 { 5702 /* 5703 * SCTP initialization for the PCB structures should be called by 5704 * the sctp_init() funciton. 5705 */ 5706 int i; 5707 struct timeval tv; 5708 5709 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5710 /* error I was called twice */ 5711 return; 5712 } 5713 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5714 5715 #if defined(SCTP_LOCAL_TRACE_BUF) 5716 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5717 #endif 5718 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5719 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5720 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5721 SCTP_M_MCORE); 5722 #endif 5723 (void)SCTP_GETTIME_TIMEVAL(&tv); 5724 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5725 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5726 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5727 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5728 #else 5729 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5730 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5731 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5732 #endif 5733 /* init the empty list of (All) Endpoints */ 5734 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5735 5736 5737 /* init the hash table of endpoints */ 5738 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5739 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5740 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5741 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5742 &SCTP_BASE_INFO(hashasocmark)); 5743 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5744 &SCTP_BASE_INFO(hashmark)); 5745 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5746 &SCTP_BASE_INFO(hashtcpmark)); 5747 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5748 5749 5750 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5751 &SCTP_BASE_INFO(hashvrfmark)); 5752 5753 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5754 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5755 /* init the zones */ 5756 /* 5757 * FIX ME: Should check for NULL returns, but if it does fail we are 5758 * doomed to panic anyways... add later maybe. 5759 */ 5760 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5761 sizeof(struct sctp_inpcb), maxsockets); 5762 5763 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5764 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5765 5766 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5767 sizeof(struct sctp_laddr), 5768 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5769 5770 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5771 sizeof(struct sctp_nets), 5772 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5773 5774 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5775 sizeof(struct sctp_tmit_chunk), 5776 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5777 5778 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5779 sizeof(struct sctp_queued_to_read), 5780 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5781 5782 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5783 sizeof(struct sctp_stream_queue_pending), 5784 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5785 5786 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5787 sizeof(struct sctp_asconf), 5788 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5789 5790 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5791 sizeof(struct sctp_asconf_ack), 5792 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5793 5794 5795 /* Master Lock INIT for info structure */ 5796 SCTP_INP_INFO_LOCK_INIT(); 5797 SCTP_STATLOG_INIT_LOCK(); 5798 5799 SCTP_IPI_COUNT_INIT(); 5800 SCTP_IPI_ADDR_INIT(); 5801 #ifdef SCTP_PACKET_LOGGING 5802 SCTP_IP_PKTLOG_INIT(); 5803 #endif 5804 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5805 5806 SCTP_WQ_ADDR_INIT(); 5807 /* not sure if we need all the counts */ 5808 SCTP_BASE_INFO(ipi_count_ep) = 0; 5809 /* assoc/tcb zone info */ 5810 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5811 /* local addrlist zone info */ 5812 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5813 /* remote addrlist zone info */ 5814 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5815 /* chunk info */ 5816 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5817 5818 /* socket queue zone info */ 5819 SCTP_BASE_INFO(ipi_count_readq) = 0; 5820 5821 /* stream out queue cont */ 5822 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5823 5824 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5825 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5826 5827 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5828 5829 /* Init the TIMEWAIT list */ 5830 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5831 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5832 } 5833 sctp_startup_iterator(); 5834 5835 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5836 sctp_startup_mcore_threads(); 5837 #endif 5838 5839 /* 5840 * INIT the default VRF which for BSD is the only one, other O/S's 5841 * may have more. But initially they must start with one and then 5842 * add the VRF's as addresses are added. 5843 */ 5844 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5845 } 5846 5847 /* 5848 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5849 */ 5850 void 5851 sctp_pcb_finish(void) 5852 { 5853 struct sctp_vrflist *vrf_bucket; 5854 struct sctp_vrf *vrf, *nvrf; 5855 struct sctp_ifn *ifn, *nifn; 5856 struct sctp_ifa *ifa, *nifa; 5857 struct sctpvtaghead *chain; 5858 struct sctp_tagblock *twait_block, *prev_twait_block; 5859 struct sctp_laddr *wi, *nwi; 5860 int i; 5861 struct sctp_iterator *it, *nit; 5862 5863 /* 5864 * In FreeBSD the iterator thread never exits but we do clean up. 5865 * The only way FreeBSD reaches here is if we have VRF's but we 5866 * still add the ifdef to make it compile on old versions. 5867 */ 5868 SCTP_IPI_ITERATOR_WQ_LOCK(); 5869 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5870 if (it->vn != curvnet) { 5871 continue; 5872 } 5873 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5874 if (it->function_atend != NULL) { 5875 (*it->function_atend) (it->pointer, it->val); 5876 } 5877 SCTP_FREE(it, SCTP_M_ITER); 5878 } 5879 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5880 SCTP_ITERATOR_LOCK(); 5881 if ((sctp_it_ctl.cur_it) && 5882 (sctp_it_ctl.cur_it->vn == curvnet)) { 5883 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5884 } 5885 SCTP_ITERATOR_UNLOCK(); 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.scope.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.scope.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.scope.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.scope.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 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6680 /* 6681 * Block(s) are present, lets see if we have this tag in the 6682 * list 6683 */ 6684 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6685 if (twait_block->vtag_block[i].v_tag == 0) { 6686 /* not used */ 6687 continue; 6688 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6689 now->tv_sec) { 6690 /* Audit expires this guy */ 6691 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6692 twait_block->vtag_block[i].v_tag = 0; 6693 twait_block->vtag_block[i].lport = 0; 6694 twait_block->vtag_block[i].rport = 0; 6695 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6696 (twait_block->vtag_block[i].lport == lport) && 6697 (twait_block->vtag_block[i].rport == rport)) { 6698 /* Bad tag, sorry :< */ 6699 SCTP_INP_INFO_RUNLOCK(); 6700 return (0); 6701 } 6702 } 6703 } 6704 SCTP_INP_INFO_RUNLOCK(); 6705 return (1); 6706 } 6707 6708 static void 6709 sctp_drain_mbufs(struct sctp_tcb *stcb) 6710 { 6711 /* 6712 * We must hunt this association for MBUF's past the cumack (i.e. 6713 * out of order data that we can renege on). 6714 */ 6715 struct sctp_association *asoc; 6716 struct sctp_tmit_chunk *chk, *nchk; 6717 uint32_t cumulative_tsn_p1; 6718 struct sctp_queued_to_read *ctl, *nctl; 6719 int cnt, strmat; 6720 uint32_t gap, i; 6721 int fnd = 0; 6722 6723 /* We look for anything larger than the cum-ack + 1 */ 6724 6725 asoc = &stcb->asoc; 6726 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6727 /* none we can reneg on. */ 6728 return; 6729 } 6730 SCTP_STAT_INCR(sctps_protocol_drains_done); 6731 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6732 cnt = 0; 6733 /* First look in the re-assembly queue */ 6734 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6735 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6736 /* Yep it is above cum-ack */ 6737 cnt++; 6738 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6739 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6740 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6741 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6742 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6743 if (chk->data) { 6744 sctp_m_freem(chk->data); 6745 chk->data = NULL; 6746 } 6747 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6748 } 6749 } 6750 /* Ok that was fun, now we will drain all the inbound streams? */ 6751 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6752 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6753 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6754 /* Yep it is above cum-ack */ 6755 cnt++; 6756 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6757 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6758 sctp_ucount_decr(asoc->cnt_on_all_streams); 6759 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6760 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6761 if (ctl->data) { 6762 sctp_m_freem(ctl->data); 6763 ctl->data = NULL; 6764 } 6765 sctp_free_remote_addr(ctl->whoFrom); 6766 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6767 SCTP_DECR_READQ_COUNT(); 6768 } 6769 } 6770 } 6771 if (cnt) { 6772 /* We must back down to see what the new highest is */ 6773 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6774 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6775 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6776 asoc->highest_tsn_inside_map = i; 6777 fnd = 1; 6778 break; 6779 } 6780 } 6781 if (!fnd) { 6782 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6783 } 6784 /* 6785 * Question, should we go through the delivery queue? The 6786 * only reason things are on here is the app not reading OR 6787 * a p-d-api up. An attacker COULD send enough in to 6788 * initiate the PD-API and then send a bunch of stuff to 6789 * other streams... these would wind up on the delivery 6790 * queue.. and then we would not get to them. But in order 6791 * to do this I then have to back-track and un-deliver 6792 * sequence numbers in streams.. el-yucko. I think for now 6793 * we will NOT look at the delivery queue and leave it to be 6794 * something to consider later. An alternative would be to 6795 * abort the P-D-API with a notification and then deliver 6796 * the data.... Or another method might be to keep track of 6797 * how many times the situation occurs and if we see a 6798 * possible attack underway just abort the association. 6799 */ 6800 #ifdef SCTP_DEBUG 6801 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6802 #endif 6803 /* 6804 * Now do we need to find a new 6805 * asoc->highest_tsn_inside_map? 6806 */ 6807 asoc->last_revoke_count = cnt; 6808 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6809 /* sa_ignore NO_NULL_CHK */ 6810 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6811 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6812 } 6813 /* 6814 * Another issue, in un-setting the TSN's in the mapping array we 6815 * DID NOT adjust the highest_tsn marker. This will cause one of 6816 * two things to occur. It may cause us to do extra work in checking 6817 * for our mapping array movement. More importantly it may cause us 6818 * to SACK every datagram. This may not be a bad thing though since 6819 * we will recover once we get our cum-ack above and all this stuff 6820 * we dumped recovered. 6821 */ 6822 } 6823 6824 void 6825 sctp_drain() 6826 { 6827 /* 6828 * We must walk the PCB lists for ALL associations here. The system 6829 * is LOW on MBUF's and needs help. This is where reneging will 6830 * occur. We really hope this does NOT happen! 6831 */ 6832 VNET_ITERATOR_DECL(vnet_iter); 6833 VNET_LIST_RLOCK_NOSLEEP(); 6834 VNET_FOREACH(vnet_iter) { 6835 CURVNET_SET(vnet_iter); 6836 struct sctp_inpcb *inp; 6837 struct sctp_tcb *stcb; 6838 6839 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6840 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6841 #ifdef VIMAGE 6842 continue; 6843 #else 6844 return; 6845 #endif 6846 } 6847 SCTP_INP_INFO_RLOCK(); 6848 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6849 /* For each endpoint */ 6850 SCTP_INP_RLOCK(inp); 6851 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6852 /* For each association */ 6853 SCTP_TCB_LOCK(stcb); 6854 sctp_drain_mbufs(stcb); 6855 SCTP_TCB_UNLOCK(stcb); 6856 } 6857 SCTP_INP_RUNLOCK(inp); 6858 } 6859 SCTP_INP_INFO_RUNLOCK(); 6860 CURVNET_RESTORE(); 6861 } 6862 VNET_LIST_RUNLOCK_NOSLEEP(); 6863 } 6864 6865 /* 6866 * start a new iterator 6867 * iterates through all endpoints and associations based on the pcb_state 6868 * flags and asoc_state. "af" (mandatory) is executed for all matching 6869 * assocs and "ef" (optional) is executed when the iterator completes. 6870 * "inpf" (optional) is executed for each new endpoint as it is being 6871 * iterated through. inpe (optional) is called when the inp completes 6872 * its way through all the stcbs. 6873 */ 6874 int 6875 sctp_initiate_iterator(inp_func inpf, 6876 asoc_func af, 6877 inp_func inpe, 6878 uint32_t pcb_state, 6879 uint32_t pcb_features, 6880 uint32_t asoc_state, 6881 void *argp, 6882 uint32_t argi, 6883 end_func ef, 6884 struct sctp_inpcb *s_inp, 6885 uint8_t chunk_output_off) 6886 { 6887 struct sctp_iterator *it = NULL; 6888 6889 if (af == NULL) { 6890 return (-1); 6891 } 6892 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6893 SCTP_M_ITER); 6894 if (it == NULL) { 6895 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6896 return (ENOMEM); 6897 } 6898 memset(it, 0, sizeof(*it)); 6899 it->function_assoc = af; 6900 it->function_inp = inpf; 6901 if (inpf) 6902 it->done_current_ep = 0; 6903 else 6904 it->done_current_ep = 1; 6905 it->function_atend = ef; 6906 it->pointer = argp; 6907 it->val = argi; 6908 it->pcb_flags = pcb_state; 6909 it->pcb_features = pcb_features; 6910 it->asoc_state = asoc_state; 6911 it->function_inp_end = inpe; 6912 it->no_chunk_output = chunk_output_off; 6913 it->vn = curvnet; 6914 if (s_inp) { 6915 /* Assume lock is held here */ 6916 it->inp = s_inp; 6917 SCTP_INP_INCR_REF(it->inp); 6918 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6919 } else { 6920 SCTP_INP_INFO_RLOCK(); 6921 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6922 if (it->inp) { 6923 SCTP_INP_INCR_REF(it->inp); 6924 } 6925 SCTP_INP_INFO_RUNLOCK(); 6926 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6927 6928 } 6929 SCTP_IPI_ITERATOR_WQ_LOCK(); 6930 6931 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6932 if (sctp_it_ctl.iterator_running == 0) { 6933 sctp_wakeup_iterator(); 6934 } 6935 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6936 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6937 return (0); 6938 } 6939