Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/netinet/sctp_pcb.c
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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: releng/11.1/sys/netinet/sctp_pcb.c 320457 2017-06-28 21:08:21Z tuexen $"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/sctp_dtrace_define.h> 49 #if defined(INET) || defined(INET6) 50 #include <netinet/udp.h> 51 #endif 52 #ifdef INET6 53 #include <netinet6/ip6_var.h> 54 #endif 55 #include <sys/sched.h> 56 #include <sys/smp.h> 57 #include <sys/unistd.h> 58 59 60 VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62 /* FIX: we don't handle multiple link local scopes */ 63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64 #ifdef INET6 65 int 66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67 { 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return (0); 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79 } 80 #endif 81 82 void 83 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 84 { 85 /* 86 * We really don't need to lock this, but I will just because it 87 * does not hurt. 88 */ 89 SCTP_INP_INFO_RLOCK(); 90 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 91 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 92 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 93 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 94 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 95 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 96 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 97 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 98 SCTP_INP_INFO_RUNLOCK(); 99 } 100 101 /*- 102 * Addresses are added to VRF's (Virtual Router's). For BSD we 103 * have only the default VRF 0. We maintain a hash list of 104 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 105 * these has a list of addresses. When we add a new address 106 * to a VRF we lookup the ifn/ifn_index, if the ifn does 107 * not exist we create it and add it to the list of IFN's 108 * within the VRF. Once we have the sctp_ifn, we add the 109 * address to the list. So we look something like: 110 * 111 * hash-vrf-table 112 * vrf-> ifn-> ifn -> ifn 113 * vrf | 114 * ... +--ifa-> ifa -> ifa 115 * vrf 116 * 117 * We keep these separate lists since the SCTP subsystem will 118 * point to these from its source address selection nets structure. 119 * When an address is deleted it does not happen right away on 120 * the SCTP side, it gets scheduled. What we do when a 121 * delete happens is immediately remove the address from 122 * the master list and decrement the refcount. As our 123 * addip iterator works through and frees the src address 124 * selection pointing to the sctp_ifa, eventually the refcount 125 * will reach 0 and we will delete it. Note that it is assumed 126 * that any locking on system level ifn/ifa is done at the 127 * caller of these functions and these routines will only 128 * lock the SCTP structures as they add or delete things. 129 * 130 * Other notes on VRF concepts. 131 * - An endpoint can be in multiple VRF's 132 * - An association lives within a VRF and only one VRF. 133 * - Any incoming packet we can deduce the VRF for by 134 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 135 * - Any downward send call or connect call must supply the 136 * VRF via ancillary data or via some sort of set default 137 * VRF socket option call (again for BSD no brainer since 138 * the VRF is always 0). 139 * - An endpoint may add multiple VRF's to it. 140 * - Listening sockets can accept associations in any 141 * of the VRF's they are in but the assoc will end up 142 * in only one VRF (gotten from the packet or connect/send). 143 * 144 */ 145 146 struct sctp_vrf * 147 sctp_allocate_vrf(int vrf_id) 148 { 149 struct sctp_vrf *vrf = NULL; 150 struct sctp_vrflist *bucket; 151 152 /* First allocate the VRF structure */ 153 vrf = sctp_find_vrf(vrf_id); 154 if (vrf) { 155 /* Already allocated */ 156 return (vrf); 157 } 158 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 159 SCTP_M_VRF); 160 if (vrf == NULL) { 161 /* No memory */ 162 #ifdef INVARIANTS 163 panic("No memory for VRF:%d", vrf_id); 164 #endif 165 return (NULL); 166 } 167 /* setup the VRF */ 168 memset(vrf, 0, sizeof(struct sctp_vrf)); 169 vrf->vrf_id = vrf_id; 170 LIST_INIT(&vrf->ifnlist); 171 vrf->total_ifa_count = 0; 172 vrf->refcount = 0; 173 /* now also setup table ids */ 174 SCTP_INIT_VRF_TABLEID(vrf); 175 /* Init the HASH of addresses */ 176 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 177 &vrf->vrf_addr_hashmark); 178 if (vrf->vrf_addr_hash == NULL) { 179 /* No memory */ 180 #ifdef INVARIANTS 181 panic("No memory for VRF:%d", vrf_id); 182 #endif 183 SCTP_FREE(vrf, SCTP_M_VRF); 184 return (NULL); 185 } 186 /* Add it to the hash table */ 187 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 188 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 189 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 190 return (vrf); 191 } 192 193 194 struct sctp_ifn * 195 sctp_find_ifn(void *ifn, uint32_t ifn_index) 196 { 197 struct sctp_ifn *sctp_ifnp; 198 struct sctp_ifnlist *hash_ifn_head; 199 200 /* 201 * We assume the lock is held for the addresses if that's wrong 202 * problems could occur :-) 203 */ 204 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 205 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 206 if (sctp_ifnp->ifn_index == ifn_index) { 207 return (sctp_ifnp); 208 } 209 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 210 return (sctp_ifnp); 211 } 212 } 213 return (NULL); 214 } 215 216 217 struct sctp_vrf * 218 sctp_find_vrf(uint32_t vrf_id) 219 { 220 struct sctp_vrflist *bucket; 221 struct sctp_vrf *liste; 222 223 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 224 LIST_FOREACH(liste, bucket, next_vrf) { 225 if (vrf_id == liste->vrf_id) { 226 return (liste); 227 } 228 } 229 return (NULL); 230 } 231 232 233 void 234 sctp_free_vrf(struct sctp_vrf *vrf) 235 { 236 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 237 if (vrf->vrf_addr_hash) { 238 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 239 vrf->vrf_addr_hash = NULL; 240 } 241 /* We zero'd the count */ 242 LIST_REMOVE(vrf, next_vrf); 243 SCTP_FREE(vrf, SCTP_M_VRF); 244 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 245 } 246 } 247 248 249 void 250 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 251 { 252 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 253 /* We zero'd the count */ 254 if (sctp_ifnp->vrf) { 255 sctp_free_vrf(sctp_ifnp->vrf); 256 } 257 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 258 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 259 } 260 } 261 262 263 void 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 265 { 266 struct sctp_ifn *sctp_ifnp; 267 268 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 269 if (sctp_ifnp != NULL) { 270 sctp_ifnp->ifn_mtu = mtu; 271 } 272 } 273 274 275 void 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 277 { 278 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 279 /* We zero'd the count */ 280 if (sctp_ifap->ifn_p) { 281 sctp_free_ifn(sctp_ifap->ifn_p); 282 } 283 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 284 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 285 } 286 } 287 288 289 static void 290 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 291 { 292 struct sctp_ifn *found; 293 294 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 295 if (found == NULL) { 296 /* Not in the list.. sorry */ 297 return; 298 } 299 if (hold_addr_lock == 0) 300 SCTP_IPI_ADDR_WLOCK(); 301 LIST_REMOVE(sctp_ifnp, next_bucket); 302 LIST_REMOVE(sctp_ifnp, next_ifn); 303 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 304 sctp_ifnp->registered_af); 305 if (hold_addr_lock == 0) 306 SCTP_IPI_ADDR_WUNLOCK(); 307 /* Take away the reference, and possibly free it */ 308 sctp_free_ifn(sctp_ifnp); 309 } 310 311 312 void 313 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 314 const char *if_name, uint32_t ifn_index) 315 { 316 struct sctp_vrf *vrf; 317 struct sctp_ifa *sctp_ifap; 318 319 SCTP_IPI_ADDR_RLOCK(); 320 vrf = sctp_find_vrf(vrf_id); 321 if (vrf == NULL) { 322 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 323 goto out; 324 325 } 326 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 327 if (sctp_ifap == NULL) { 328 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 329 goto out; 330 } 331 if (sctp_ifap->ifn_p == NULL) { 332 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 333 goto out; 334 } 335 if (if_name) { 336 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 337 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 338 sctp_ifap->ifn_p->ifn_name, if_name); 339 goto out; 340 } 341 } else { 342 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 343 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 344 sctp_ifap->ifn_p->ifn_index, ifn_index); 345 goto out; 346 } 347 } 348 349 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 350 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 351 out: 352 SCTP_IPI_ADDR_RUNLOCK(); 353 } 354 355 356 void 357 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 358 const char *if_name, uint32_t ifn_index) 359 { 360 struct sctp_vrf *vrf; 361 struct sctp_ifa *sctp_ifap; 362 363 SCTP_IPI_ADDR_RLOCK(); 364 vrf = sctp_find_vrf(vrf_id); 365 if (vrf == NULL) { 366 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 367 goto out; 368 369 } 370 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 371 if (sctp_ifap == NULL) { 372 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 373 goto out; 374 } 375 if (sctp_ifap->ifn_p == NULL) { 376 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 377 goto out; 378 } 379 if (if_name) { 380 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 381 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 382 sctp_ifap->ifn_p->ifn_name, if_name); 383 goto out; 384 } 385 } else { 386 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 387 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 388 sctp_ifap->ifn_p->ifn_index, ifn_index); 389 goto out; 390 } 391 } 392 393 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 394 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 395 out: 396 SCTP_IPI_ADDR_RUNLOCK(); 397 } 398 399 400 /*- 401 * Add an ifa to an ifn. 402 * Register the interface as necessary. 403 * NOTE: ADDR write lock MUST be held. 404 */ 405 static void 406 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 407 { 408 int ifa_af; 409 410 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 411 sctp_ifap->ifn_p = sctp_ifnp; 412 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 413 /* update address counts */ 414 sctp_ifnp->ifa_count++; 415 ifa_af = sctp_ifap->address.sa.sa_family; 416 switch (ifa_af) { 417 #ifdef INET 418 case AF_INET: 419 sctp_ifnp->num_v4++; 420 break; 421 #endif 422 #ifdef INET6 423 case AF_INET6: 424 sctp_ifnp->num_v6++; 425 break; 426 #endif 427 default: 428 break; 429 } 430 if (sctp_ifnp->ifa_count == 1) { 431 /* register the new interface */ 432 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 433 sctp_ifnp->registered_af = ifa_af; 434 } 435 } 436 437 438 /*- 439 * Remove an ifa from its ifn. 440 * If no more addresses exist, remove the ifn too. Otherwise, re-register 441 * the interface based on the remaining address families left. 442 * NOTE: ADDR write lock MUST be held. 443 */ 444 static void 445 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 446 { 447 LIST_REMOVE(sctp_ifap, next_ifa); 448 if (sctp_ifap->ifn_p) { 449 /* update address counts */ 450 sctp_ifap->ifn_p->ifa_count--; 451 switch (sctp_ifap->address.sa.sa_family) { 452 #ifdef INET 453 case AF_INET: 454 sctp_ifap->ifn_p->num_v4--; 455 break; 456 #endif 457 #ifdef INET6 458 case AF_INET6: 459 sctp_ifap->ifn_p->num_v6--; 460 break; 461 #endif 462 default: 463 break; 464 } 465 466 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 467 /* remove the ifn, possibly freeing it */ 468 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 469 } else { 470 /* re-register address family type, if needed */ 471 if ((sctp_ifap->ifn_p->num_v6 == 0) && 472 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 473 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 474 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 475 sctp_ifap->ifn_p->registered_af = AF_INET; 476 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 477 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 478 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 479 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 480 sctp_ifap->ifn_p->registered_af = AF_INET6; 481 } 482 /* free the ifn refcount */ 483 sctp_free_ifn(sctp_ifap->ifn_p); 484 } 485 sctp_ifap->ifn_p = NULL; 486 } 487 } 488 489 490 struct sctp_ifa * 491 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 492 uint32_t ifn_type, const char *if_name, void *ifa, 493 struct sockaddr *addr, uint32_t ifa_flags, 494 int dynamic_add) 495 { 496 struct sctp_vrf *vrf; 497 struct sctp_ifn *sctp_ifnp = NULL; 498 struct sctp_ifa *sctp_ifap = NULL; 499 struct sctp_ifalist *hash_addr_head; 500 struct sctp_ifnlist *hash_ifn_head; 501 uint32_t hash_of_addr; 502 int new_ifn_af = 0; 503 504 #ifdef SCTP_DEBUG 505 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 506 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 507 #endif 508 SCTP_IPI_ADDR_WLOCK(); 509 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 510 if (sctp_ifnp) { 511 vrf = sctp_ifnp->vrf; 512 } else { 513 vrf = sctp_find_vrf(vrf_id); 514 if (vrf == NULL) { 515 vrf = sctp_allocate_vrf(vrf_id); 516 if (vrf == NULL) { 517 SCTP_IPI_ADDR_WUNLOCK(); 518 return (NULL); 519 } 520 } 521 } 522 if (sctp_ifnp == NULL) { 523 /* 524 * build one and add it, can't hold lock until after malloc 525 * done though. 526 */ 527 SCTP_IPI_ADDR_WUNLOCK(); 528 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 529 sizeof(struct sctp_ifn), SCTP_M_IFN); 530 if (sctp_ifnp == NULL) { 531 #ifdef INVARIANTS 532 panic("No memory for IFN"); 533 #endif 534 return (NULL); 535 } 536 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 537 sctp_ifnp->ifn_index = ifn_index; 538 sctp_ifnp->ifn_p = ifn; 539 sctp_ifnp->ifn_type = ifn_type; 540 sctp_ifnp->refcount = 0; 541 sctp_ifnp->vrf = vrf; 542 atomic_add_int(&vrf->refcount, 1); 543 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 544 if (if_name != NULL) { 545 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 546 } else { 547 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 548 } 549 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 550 LIST_INIT(&sctp_ifnp->ifalist); 551 SCTP_IPI_ADDR_WLOCK(); 552 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 553 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 554 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 555 new_ifn_af = 1; 556 } 557 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 558 if (sctp_ifap) { 559 /* Hmm, it already exists? */ 560 if ((sctp_ifap->ifn_p) && 561 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 562 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 563 sctp_ifap->ifn_p->ifn_name, ifn_index, 564 (void *)sctp_ifap); 565 if (new_ifn_af) { 566 /* Remove the created one that we don't want */ 567 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 568 } 569 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 570 /* easy to solve, just switch back to active */ 571 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 572 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 573 sctp_ifap->ifn_p = sctp_ifnp; 574 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 575 } 576 exit_stage_left: 577 SCTP_IPI_ADDR_WUNLOCK(); 578 return (sctp_ifap); 579 } else { 580 if (sctp_ifap->ifn_p) { 581 /* 582 * The last IFN gets the address, remove the 583 * old one 584 */ 585 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 586 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 587 sctp_ifap->ifn_p->ifn_index, if_name, 588 ifn_index); 589 /* remove the address from the old ifn */ 590 sctp_remove_ifa_from_ifn(sctp_ifap); 591 /* move the address over to the new ifn */ 592 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 593 goto exit_stage_left; 594 } else { 595 /* repair ifnp which was NULL ? */ 596 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 597 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 598 (void *)sctp_ifnp, (void *)sctp_ifap); 599 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 600 } 601 goto exit_stage_left; 602 } 603 } 604 SCTP_IPI_ADDR_WUNLOCK(); 605 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 606 if (sctp_ifap == NULL) { 607 #ifdef INVARIANTS 608 panic("No memory for IFA"); 609 #endif 610 return (NULL); 611 } 612 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 613 sctp_ifap->ifn_p = sctp_ifnp; 614 atomic_add_int(&sctp_ifnp->refcount, 1); 615 sctp_ifap->vrf_id = vrf_id; 616 sctp_ifap->ifa = ifa; 617 memcpy(&sctp_ifap->address, addr, addr->sa_len); 618 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 619 sctp_ifap->flags = ifa_flags; 620 /* Set scope */ 621 switch (sctp_ifap->address.sa.sa_family) { 622 #ifdef INET 623 case AF_INET: 624 { 625 struct sockaddr_in *sin; 626 627 sin = &sctp_ifap->address.sin; 628 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 629 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 630 sctp_ifap->src_is_loop = 1; 631 } 632 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 633 sctp_ifap->src_is_priv = 1; 634 } 635 sctp_ifnp->num_v4++; 636 if (new_ifn_af) 637 new_ifn_af = AF_INET; 638 break; 639 } 640 #endif 641 #ifdef INET6 642 case AF_INET6: 643 { 644 /* ok to use deprecated addresses? */ 645 struct sockaddr_in6 *sin6; 646 647 sin6 = &sctp_ifap->address.sin6; 648 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 649 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 650 sctp_ifap->src_is_loop = 1; 651 } 652 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 653 sctp_ifap->src_is_priv = 1; 654 } 655 sctp_ifnp->num_v6++; 656 if (new_ifn_af) 657 new_ifn_af = AF_INET6; 658 break; 659 } 660 #endif 661 default: 662 new_ifn_af = 0; 663 break; 664 } 665 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 666 667 if ((sctp_ifap->src_is_priv == 0) && 668 (sctp_ifap->src_is_loop == 0)) { 669 sctp_ifap->src_is_glob = 1; 670 } 671 SCTP_IPI_ADDR_WLOCK(); 672 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 673 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 674 sctp_ifap->refcount = 1; 675 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 676 sctp_ifnp->ifa_count++; 677 vrf->total_ifa_count++; 678 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 679 if (new_ifn_af) { 680 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 681 sctp_ifnp->registered_af = new_ifn_af; 682 } 683 SCTP_IPI_ADDR_WUNLOCK(); 684 if (dynamic_add) { 685 /* 686 * Bump up the refcount so that when the timer completes it 687 * will drop back down. 688 */ 689 struct sctp_laddr *wi; 690 691 atomic_add_int(&sctp_ifap->refcount, 1); 692 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 693 if (wi == NULL) { 694 /* 695 * Gak, what can we do? We have lost an address 696 * change can you say HOSED? 697 */ 698 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 699 /* Opps, must decrement the count */ 700 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 701 if_name); 702 return (NULL); 703 } 704 SCTP_INCR_LADDR_COUNT(); 705 bzero(wi, sizeof(*wi)); 706 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 707 wi->ifa = sctp_ifap; 708 wi->action = SCTP_ADD_IP_ADDRESS; 709 710 SCTP_WQ_ADDR_LOCK(); 711 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 712 SCTP_WQ_ADDR_UNLOCK(); 713 714 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 715 (struct sctp_inpcb *)NULL, 716 (struct sctp_tcb *)NULL, 717 (struct sctp_nets *)NULL); 718 } else { 719 /* it's ready for use */ 720 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 721 } 722 return (sctp_ifap); 723 } 724 725 void 726 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 727 uint32_t ifn_index, const char *if_name) 728 { 729 struct sctp_vrf *vrf; 730 struct sctp_ifa *sctp_ifap = NULL; 731 732 SCTP_IPI_ADDR_WLOCK(); 733 vrf = sctp_find_vrf(vrf_id); 734 if (vrf == NULL) { 735 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 736 goto out_now; 737 } 738 #ifdef SCTP_DEBUG 739 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 740 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 741 #endif 742 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 743 if (sctp_ifap) { 744 /* Validate the delete */ 745 if (sctp_ifap->ifn_p) { 746 int valid = 0; 747 748 /*- 749 * The name has priority over the ifn_index 750 * if its given. We do this especially for 751 * panda who might recycle indexes fast. 752 */ 753 if (if_name) { 754 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 755 /* They match its a correct delete */ 756 valid = 1; 757 } 758 } 759 if (!valid) { 760 /* last ditch check ifn_index */ 761 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 762 valid = 1; 763 } 764 } 765 if (!valid) { 766 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 767 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 768 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 769 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 770 SCTP_IPI_ADDR_WUNLOCK(); 771 return; 772 } 773 } 774 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 775 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 776 /* 777 * We don't set the flag. This means that the structure will 778 * hang around in EP's that have bound specific to it until 779 * they close. This gives us TCP like behavior if someone 780 * removes an address (or for that matter adds it right 781 * back). 782 */ 783 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 784 vrf->total_ifa_count--; 785 LIST_REMOVE(sctp_ifap, next_bucket); 786 sctp_remove_ifa_from_ifn(sctp_ifap); 787 } 788 #ifdef SCTP_DEBUG 789 else { 790 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 791 ifn_index); 792 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 793 } 794 #endif 795 796 out_now: 797 SCTP_IPI_ADDR_WUNLOCK(); 798 if (sctp_ifap) { 799 struct sctp_laddr *wi; 800 801 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 802 if (wi == NULL) { 803 /* 804 * Gak, what can we do? We have lost an address 805 * change can you say HOSED? 806 */ 807 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 808 809 /* Oops, must decrement the count */ 810 sctp_free_ifa(sctp_ifap); 811 return; 812 } 813 SCTP_INCR_LADDR_COUNT(); 814 bzero(wi, sizeof(*wi)); 815 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 816 wi->ifa = sctp_ifap; 817 wi->action = SCTP_DEL_IP_ADDRESS; 818 SCTP_WQ_ADDR_LOCK(); 819 /* 820 * Should this really be a tailq? As it is we will process 821 * the newest first :-0 822 */ 823 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 824 SCTP_WQ_ADDR_UNLOCK(); 825 826 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 827 (struct sctp_inpcb *)NULL, 828 (struct sctp_tcb *)NULL, 829 (struct sctp_nets *)NULL); 830 } 831 return; 832 } 833 834 835 static int 836 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 837 { 838 int loopback_scope; 839 #if defined(INET) 840 int ipv4_local_scope, ipv4_addr_legal; 841 #endif 842 #if defined(INET6) 843 int local_scope, site_scope, ipv6_addr_legal; 844 #endif 845 struct sctp_vrf *vrf; 846 struct sctp_ifn *sctp_ifn; 847 struct sctp_ifa *sctp_ifa; 848 849 loopback_scope = stcb->asoc.scope.loopback_scope; 850 #if defined(INET) 851 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 852 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 853 #endif 854 #if defined(INET6) 855 local_scope = stcb->asoc.scope.local_scope; 856 site_scope = stcb->asoc.scope.site_scope; 857 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 858 #endif 859 860 SCTP_IPI_ADDR_RLOCK(); 861 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 862 if (vrf == NULL) { 863 /* no vrf, no addresses */ 864 SCTP_IPI_ADDR_RUNLOCK(); 865 return (0); 866 } 867 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 868 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 869 if ((loopback_scope == 0) && 870 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 871 continue; 872 } 873 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 874 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 875 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 876 /* 877 * We allow pending addresses, where 878 * we have sent an asconf-add to be 879 * considered valid. 880 */ 881 continue; 882 } 883 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 884 continue; 885 } 886 switch (sctp_ifa->address.sa.sa_family) { 887 #ifdef INET 888 case AF_INET: 889 if (ipv4_addr_legal) { 890 struct sockaddr_in *sin, 891 *rsin; 892 893 sin = &sctp_ifa->address.sin; 894 rsin = (struct sockaddr_in *)to; 895 if ((ipv4_local_scope == 0) && 896 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 897 continue; 898 } 899 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 900 &sin->sin_addr) != 0) { 901 continue; 902 } 903 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 904 SCTP_IPI_ADDR_RUNLOCK(); 905 return (1); 906 } 907 } 908 break; 909 #endif 910 #ifdef INET6 911 case AF_INET6: 912 if (ipv6_addr_legal) { 913 struct sockaddr_in6 *sin6, 914 *rsin6; 915 916 sin6 = &sctp_ifa->address.sin6; 917 rsin6 = (struct sockaddr_in6 *)to; 918 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 919 &sin6->sin6_addr) != 0) { 920 continue; 921 } 922 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 923 if (local_scope == 0) 924 continue; 925 if (sin6->sin6_scope_id == 0) { 926 if (sa6_recoverscope(sin6) != 0) 927 continue; 928 } 929 } 930 if ((site_scope == 0) && 931 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 932 continue; 933 } 934 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 935 SCTP_IPI_ADDR_RUNLOCK(); 936 return (1); 937 } 938 } 939 break; 940 #endif 941 default: 942 /* TSNH */ 943 break; 944 } 945 } 946 } 947 } else { 948 struct sctp_laddr *laddr; 949 950 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 951 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 952 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 953 continue; 954 } 955 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 956 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 957 /* 958 * We allow pending addresses, where we have 959 * sent an asconf-add to be considered 960 * valid. 961 */ 962 continue; 963 } 964 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 965 continue; 966 } 967 switch (to->sa_family) { 968 #ifdef INET 969 case AF_INET: 970 { 971 struct sockaddr_in *sin, *rsin; 972 973 sin = &laddr->ifa->address.sin; 974 rsin = (struct sockaddr_in *)to; 975 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 976 SCTP_IPI_ADDR_RUNLOCK(); 977 return (1); 978 } 979 break; 980 } 981 #endif 982 #ifdef INET6 983 case AF_INET6: 984 { 985 struct sockaddr_in6 *sin6, *rsin6; 986 987 sin6 = &laddr->ifa->address.sin6; 988 rsin6 = (struct sockaddr_in6 *)to; 989 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 990 SCTP_IPI_ADDR_RUNLOCK(); 991 return (1); 992 } 993 break; 994 } 995 996 #endif 997 default: 998 /* TSNH */ 999 break; 1000 } 1001 1002 } 1003 } 1004 SCTP_IPI_ADDR_RUNLOCK(); 1005 return (0); 1006 } 1007 1008 1009 static struct sctp_tcb * 1010 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1011 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1012 { 1013 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1014 /* 1015 * If we support the TCP model, then we must now dig through to see 1016 * if we can find our endpoint in the list of tcp ep's. 1017 */ 1018 uint16_t lport, rport; 1019 struct sctppcbhead *ephead; 1020 struct sctp_inpcb *inp; 1021 struct sctp_laddr *laddr; 1022 struct sctp_tcb *stcb; 1023 struct sctp_nets *net; 1024 1025 if ((to == NULL) || (from == NULL)) { 1026 return (NULL); 1027 } 1028 switch (to->sa_family) { 1029 #ifdef INET 1030 case AF_INET: 1031 if (from->sa_family == AF_INET) { 1032 lport = ((struct sockaddr_in *)to)->sin_port; 1033 rport = ((struct sockaddr_in *)from)->sin_port; 1034 } else { 1035 return (NULL); 1036 } 1037 break; 1038 #endif 1039 #ifdef INET6 1040 case AF_INET6: 1041 if (from->sa_family == AF_INET6) { 1042 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1043 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1044 } else { 1045 return (NULL); 1046 } 1047 break; 1048 #endif 1049 default: 1050 return (NULL); 1051 } 1052 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1053 /* 1054 * Ok now for each of the guys in this bucket we must look and see: 1055 * - Does the remote port match. - Does there single association's 1056 * addresses match this address (to). If so we update p_ep to point 1057 * to this ep and return the tcb from it. 1058 */ 1059 LIST_FOREACH(inp, ephead, sctp_hash) { 1060 SCTP_INP_RLOCK(inp); 1061 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1062 SCTP_INP_RUNLOCK(inp); 1063 continue; 1064 } 1065 if (lport != inp->sctp_lport) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 switch (to->sa_family) { 1070 #ifdef INET 1071 case AF_INET: 1072 { 1073 struct sockaddr_in *sin; 1074 1075 sin = (struct sockaddr_in *)to; 1076 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1077 &sin->sin_addr) != 0) { 1078 SCTP_INP_RUNLOCK(inp); 1079 continue; 1080 } 1081 break; 1082 } 1083 #endif 1084 #ifdef INET6 1085 case AF_INET6: 1086 { 1087 struct sockaddr_in6 *sin6; 1088 1089 sin6 = (struct sockaddr_in6 *)to; 1090 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1091 &sin6->sin6_addr) != 0) { 1092 SCTP_INP_RUNLOCK(inp); 1093 continue; 1094 } 1095 break; 1096 } 1097 #endif 1098 default: 1099 SCTP_INP_RUNLOCK(inp); 1100 continue; 1101 } 1102 if (inp->def_vrf_id != vrf_id) { 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 /* check to see if the ep has one of the addresses */ 1107 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1108 /* We are NOT bound all, so look further */ 1109 int match = 0; 1110 1111 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1112 1113 if (laddr->ifa == NULL) { 1114 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1115 continue; 1116 } 1117 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1119 continue; 1120 } 1121 if (laddr->ifa->address.sa.sa_family == 1122 to->sa_family) { 1123 /* see if it matches */ 1124 #ifdef INET 1125 if (from->sa_family == AF_INET) { 1126 struct sockaddr_in *intf_addr, 1127 *sin; 1128 1129 intf_addr = &laddr->ifa->address.sin; 1130 sin = (struct sockaddr_in *)to; 1131 if (sin->sin_addr.s_addr == 1132 intf_addr->sin_addr.s_addr) { 1133 match = 1; 1134 break; 1135 } 1136 } 1137 #endif 1138 #ifdef INET6 1139 if (from->sa_family == AF_INET6) { 1140 struct sockaddr_in6 *intf_addr6; 1141 struct sockaddr_in6 *sin6; 1142 1143 sin6 = (struct sockaddr_in6 *) 1144 to; 1145 intf_addr6 = &laddr->ifa->address.sin6; 1146 1147 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1148 intf_addr6)) { 1149 match = 1; 1150 break; 1151 } 1152 } 1153 #endif 1154 } 1155 } 1156 if (match == 0) { 1157 /* This endpoint does not have this address */ 1158 SCTP_INP_RUNLOCK(inp); 1159 continue; 1160 } 1161 } 1162 /* 1163 * Ok if we hit here the ep has the address, does it hold 1164 * the tcb? 1165 */ 1166 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1167 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1168 if (stcb == NULL) { 1169 SCTP_INP_RUNLOCK(inp); 1170 continue; 1171 } 1172 SCTP_TCB_LOCK(stcb); 1173 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1174 SCTP_TCB_UNLOCK(stcb); 1175 SCTP_INP_RUNLOCK(inp); 1176 continue; 1177 } 1178 if (stcb->rport != rport) { 1179 /* remote port does not match. */ 1180 SCTP_TCB_UNLOCK(stcb); 1181 SCTP_INP_RUNLOCK(inp); 1182 continue; 1183 } 1184 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1185 SCTP_TCB_UNLOCK(stcb); 1186 SCTP_INP_RUNLOCK(inp); 1187 continue; 1188 } 1189 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1190 SCTP_TCB_UNLOCK(stcb); 1191 SCTP_INP_RUNLOCK(inp); 1192 continue; 1193 } 1194 /* Does this TCB have a matching address? */ 1195 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1196 1197 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1198 /* not the same family, can't be a match */ 1199 continue; 1200 } 1201 switch (from->sa_family) { 1202 #ifdef INET 1203 case AF_INET: 1204 { 1205 struct sockaddr_in *sin, *rsin; 1206 1207 sin = (struct sockaddr_in *)&net->ro._l_addr; 1208 rsin = (struct sockaddr_in *)from; 1209 if (sin->sin_addr.s_addr == 1210 rsin->sin_addr.s_addr) { 1211 /* found it */ 1212 if (netp != NULL) { 1213 *netp = net; 1214 } 1215 /* 1216 * Update the endpoint 1217 * pointer 1218 */ 1219 *inp_p = inp; 1220 SCTP_INP_RUNLOCK(inp); 1221 return (stcb); 1222 } 1223 break; 1224 } 1225 #endif 1226 #ifdef INET6 1227 case AF_INET6: 1228 { 1229 struct sockaddr_in6 *sin6, *rsin6; 1230 1231 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1232 rsin6 = (struct sockaddr_in6 *)from; 1233 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1234 rsin6)) { 1235 /* found it */ 1236 if (netp != NULL) { 1237 *netp = net; 1238 } 1239 /* 1240 * Update the endpoint 1241 * pointer 1242 */ 1243 *inp_p = inp; 1244 SCTP_INP_RUNLOCK(inp); 1245 return (stcb); 1246 } 1247 break; 1248 } 1249 #endif 1250 default: 1251 /* TSNH */ 1252 break; 1253 } 1254 } 1255 SCTP_TCB_UNLOCK(stcb); 1256 SCTP_INP_RUNLOCK(inp); 1257 } 1258 return (NULL); 1259 } 1260 1261 1262 /* 1263 * rules for use 1264 * 1265 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1266 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1267 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1268 * NULL. 1269 */ 1270 1271 struct sctp_tcb * 1272 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1273 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1274 { 1275 struct sctpasochead *head; 1276 struct sctp_inpcb *inp; 1277 struct sctp_tcb *stcb = NULL; 1278 struct sctp_nets *net; 1279 uint16_t rport; 1280 1281 inp = *inp_p; 1282 switch (remote->sa_family) { 1283 #ifdef INET 1284 case AF_INET: 1285 rport = (((struct sockaddr_in *)remote)->sin_port); 1286 break; 1287 #endif 1288 #ifdef INET6 1289 case AF_INET6: 1290 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1291 break; 1292 #endif 1293 default: 1294 return (NULL); 1295 } 1296 if (locked_tcb) { 1297 /* 1298 * UN-lock so we can do proper locking here this occurs when 1299 * called from load_addresses_from_init. 1300 */ 1301 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1302 SCTP_TCB_UNLOCK(locked_tcb); 1303 } 1304 SCTP_INP_INFO_RLOCK(); 1305 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1306 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1307 /*- 1308 * Now either this guy is our listener or it's the 1309 * connector. If it is the one that issued the connect, then 1310 * it's only chance is to be the first TCB in the list. If 1311 * it is the acceptor, then do the special_lookup to hash 1312 * and find the real inp. 1313 */ 1314 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1315 /* to is peer addr, from is my addr */ 1316 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1317 netp, inp->def_vrf_id); 1318 if ((stcb != NULL) && (locked_tcb == NULL)) { 1319 /* we have a locked tcb, lower refcount */ 1320 SCTP_INP_DECR_REF(inp); 1321 } 1322 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1323 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1324 SCTP_TCB_LOCK(locked_tcb); 1325 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1326 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1327 } 1328 SCTP_INP_INFO_RUNLOCK(); 1329 return (stcb); 1330 } else { 1331 SCTP_INP_WLOCK(inp); 1332 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1333 goto null_return; 1334 } 1335 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1336 if (stcb == NULL) { 1337 goto null_return; 1338 } 1339 SCTP_TCB_LOCK(stcb); 1340 1341 if (stcb->rport != rport) { 1342 /* remote port does not match. */ 1343 SCTP_TCB_UNLOCK(stcb); 1344 goto null_return; 1345 } 1346 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 /* now look at the list of remote addresses */ 1355 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1356 #ifdef INVARIANTS 1357 if (net == (TAILQ_NEXT(net, sctp_next))) { 1358 panic("Corrupt net list"); 1359 } 1360 #endif 1361 if (net->ro._l_addr.sa.sa_family != 1362 remote->sa_family) { 1363 /* not the same family */ 1364 continue; 1365 } 1366 switch (remote->sa_family) { 1367 #ifdef INET 1368 case AF_INET: 1369 { 1370 struct sockaddr_in *sin, 1371 *rsin; 1372 1373 sin = (struct sockaddr_in *) 1374 &net->ro._l_addr; 1375 rsin = (struct sockaddr_in *)remote; 1376 if (sin->sin_addr.s_addr == 1377 rsin->sin_addr.s_addr) { 1378 /* found it */ 1379 if (netp != NULL) { 1380 *netp = net; 1381 } 1382 if (locked_tcb == NULL) { 1383 SCTP_INP_DECR_REF(inp); 1384 } else if (locked_tcb != stcb) { 1385 SCTP_TCB_LOCK(locked_tcb); 1386 } 1387 if (locked_tcb) { 1388 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1389 } 1390 SCTP_INP_WUNLOCK(inp); 1391 SCTP_INP_INFO_RUNLOCK(); 1392 return (stcb); 1393 } 1394 break; 1395 } 1396 #endif 1397 #ifdef INET6 1398 case AF_INET6: 1399 { 1400 struct sockaddr_in6 *sin6, 1401 *rsin6; 1402 1403 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1404 rsin6 = (struct sockaddr_in6 *)remote; 1405 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1406 rsin6)) { 1407 /* found it */ 1408 if (netp != NULL) { 1409 *netp = net; 1410 } 1411 if (locked_tcb == NULL) { 1412 SCTP_INP_DECR_REF(inp); 1413 } else if (locked_tcb != stcb) { 1414 SCTP_TCB_LOCK(locked_tcb); 1415 } 1416 if (locked_tcb) { 1417 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1418 } 1419 SCTP_INP_WUNLOCK(inp); 1420 SCTP_INP_INFO_RUNLOCK(); 1421 return (stcb); 1422 } 1423 break; 1424 } 1425 #endif 1426 default: 1427 /* TSNH */ 1428 break; 1429 } 1430 } 1431 SCTP_TCB_UNLOCK(stcb); 1432 } 1433 } else { 1434 SCTP_INP_WLOCK(inp); 1435 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1436 goto null_return; 1437 } 1438 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1439 inp->sctp_hashmark)]; 1440 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1441 if (stcb->rport != rport) { 1442 /* remote port does not match */ 1443 continue; 1444 } 1445 SCTP_TCB_LOCK(stcb); 1446 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1447 SCTP_TCB_UNLOCK(stcb); 1448 continue; 1449 } 1450 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 /* now look at the list of remote addresses */ 1455 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1456 #ifdef INVARIANTS 1457 if (net == (TAILQ_NEXT(net, sctp_next))) { 1458 panic("Corrupt net list"); 1459 } 1460 #endif 1461 if (net->ro._l_addr.sa.sa_family != 1462 remote->sa_family) { 1463 /* not the same family */ 1464 continue; 1465 } 1466 switch (remote->sa_family) { 1467 #ifdef INET 1468 case AF_INET: 1469 { 1470 struct sockaddr_in *sin, 1471 *rsin; 1472 1473 sin = (struct sockaddr_in *) 1474 &net->ro._l_addr; 1475 rsin = (struct sockaddr_in *)remote; 1476 if (sin->sin_addr.s_addr == 1477 rsin->sin_addr.s_addr) { 1478 /* found it */ 1479 if (netp != NULL) { 1480 *netp = net; 1481 } 1482 if (locked_tcb == NULL) { 1483 SCTP_INP_DECR_REF(inp); 1484 } else if (locked_tcb != stcb) { 1485 SCTP_TCB_LOCK(locked_tcb); 1486 } 1487 if (locked_tcb) { 1488 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1489 } 1490 SCTP_INP_WUNLOCK(inp); 1491 SCTP_INP_INFO_RUNLOCK(); 1492 return (stcb); 1493 } 1494 break; 1495 } 1496 #endif 1497 #ifdef INET6 1498 case AF_INET6: 1499 { 1500 struct sockaddr_in6 *sin6, 1501 *rsin6; 1502 1503 sin6 = (struct sockaddr_in6 *) 1504 &net->ro._l_addr; 1505 rsin6 = (struct sockaddr_in6 *)remote; 1506 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1507 rsin6)) { 1508 /* found it */ 1509 if (netp != NULL) { 1510 *netp = net; 1511 } 1512 if (locked_tcb == NULL) { 1513 SCTP_INP_DECR_REF(inp); 1514 } else if (locked_tcb != stcb) { 1515 SCTP_TCB_LOCK(locked_tcb); 1516 } 1517 if (locked_tcb) { 1518 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1519 } 1520 SCTP_INP_WUNLOCK(inp); 1521 SCTP_INP_INFO_RUNLOCK(); 1522 return (stcb); 1523 } 1524 break; 1525 } 1526 #endif 1527 default: 1528 /* TSNH */ 1529 break; 1530 } 1531 } 1532 SCTP_TCB_UNLOCK(stcb); 1533 } 1534 } 1535 null_return: 1536 /* clean up for returning null */ 1537 if (locked_tcb) { 1538 SCTP_TCB_LOCK(locked_tcb); 1539 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1540 } 1541 SCTP_INP_WUNLOCK(inp); 1542 SCTP_INP_INFO_RUNLOCK(); 1543 /* not found */ 1544 return (NULL); 1545 } 1546 1547 1548 /* 1549 * Find an association for a specific endpoint using the association id given 1550 * out in the COMM_UP notification 1551 */ 1552 struct sctp_tcb * 1553 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1554 { 1555 /* 1556 * Use my the assoc_id to find a endpoint 1557 */ 1558 struct sctpasochead *head; 1559 struct sctp_tcb *stcb; 1560 uint32_t id; 1561 1562 if (inp == NULL) { 1563 SCTP_PRINTF("TSNH ep_associd\n"); 1564 return (NULL); 1565 } 1566 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1567 SCTP_PRINTF("TSNH ep_associd0\n"); 1568 return (NULL); 1569 } 1570 id = (uint32_t)asoc_id; 1571 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1572 if (head == NULL) { 1573 /* invalid id TSNH */ 1574 SCTP_PRINTF("TSNH ep_associd1\n"); 1575 return (NULL); 1576 } 1577 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1578 if (stcb->asoc.assoc_id == id) { 1579 if (inp != stcb->sctp_ep) { 1580 /* 1581 * some other guy has the same id active (id 1582 * collision ??). 1583 */ 1584 SCTP_PRINTF("TSNH ep_associd2\n"); 1585 continue; 1586 } 1587 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1588 continue; 1589 } 1590 if (want_lock) { 1591 SCTP_TCB_LOCK(stcb); 1592 } 1593 return (stcb); 1594 } 1595 } 1596 return (NULL); 1597 } 1598 1599 1600 struct sctp_tcb * 1601 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1602 { 1603 struct sctp_tcb *stcb; 1604 1605 SCTP_INP_RLOCK(inp); 1606 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1607 SCTP_INP_RUNLOCK(inp); 1608 return (stcb); 1609 } 1610 1611 1612 /* 1613 * Endpoint probe expects that the INP_INFO is locked. 1614 */ 1615 static struct sctp_inpcb * 1616 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1617 uint16_t lport, uint32_t vrf_id) 1618 { 1619 struct sctp_inpcb *inp; 1620 struct sctp_laddr *laddr; 1621 #ifdef INET 1622 struct sockaddr_in *sin; 1623 #endif 1624 #ifdef INET6 1625 struct sockaddr_in6 *sin6; 1626 struct sockaddr_in6 *intf_addr6; 1627 #endif 1628 int fnd; 1629 1630 #ifdef INET 1631 sin = NULL; 1632 #endif 1633 #ifdef INET6 1634 sin6 = NULL; 1635 #endif 1636 switch (nam->sa_family) { 1637 #ifdef INET 1638 case AF_INET: 1639 sin = (struct sockaddr_in *)nam; 1640 break; 1641 #endif 1642 #ifdef INET6 1643 case AF_INET6: 1644 sin6 = (struct sockaddr_in6 *)nam; 1645 break; 1646 #endif 1647 default: 1648 /* unsupported family */ 1649 return (NULL); 1650 } 1651 1652 if (head == NULL) 1653 return (NULL); 1654 1655 LIST_FOREACH(inp, head, sctp_hash) { 1656 SCTP_INP_RLOCK(inp); 1657 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1658 SCTP_INP_RUNLOCK(inp); 1659 continue; 1660 } 1661 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1662 (inp->sctp_lport == lport)) { 1663 /* got it */ 1664 switch (nam->sa_family) { 1665 #ifdef INET 1666 case AF_INET: 1667 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1668 SCTP_IPV6_V6ONLY(inp)) { 1669 /* 1670 * IPv4 on a IPv6 socket with ONLY 1671 * IPv6 set 1672 */ 1673 SCTP_INP_RUNLOCK(inp); 1674 continue; 1675 } 1676 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1677 &sin->sin_addr) != 0) { 1678 SCTP_INP_RUNLOCK(inp); 1679 continue; 1680 } 1681 break; 1682 #endif 1683 #ifdef INET6 1684 case AF_INET6: 1685 /* 1686 * A V6 address and the endpoint is NOT 1687 * bound V6 1688 */ 1689 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1690 SCTP_INP_RUNLOCK(inp); 1691 continue; 1692 } 1693 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1694 &sin6->sin6_addr) != 0) { 1695 SCTP_INP_RUNLOCK(inp); 1696 continue; 1697 } 1698 break; 1699 #endif 1700 default: 1701 break; 1702 } 1703 /* does a VRF id match? */ 1704 fnd = 0; 1705 if (inp->def_vrf_id == vrf_id) 1706 fnd = 1; 1707 1708 SCTP_INP_RUNLOCK(inp); 1709 if (!fnd) 1710 continue; 1711 return (inp); 1712 } 1713 SCTP_INP_RUNLOCK(inp); 1714 } 1715 switch (nam->sa_family) { 1716 #ifdef INET 1717 case AF_INET: 1718 if (sin->sin_addr.s_addr == INADDR_ANY) { 1719 /* Can't hunt for one that has no address specified */ 1720 return (NULL); 1721 } 1722 break; 1723 #endif 1724 #ifdef INET6 1725 case AF_INET6: 1726 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1727 /* Can't hunt for one that has no address specified */ 1728 return (NULL); 1729 } 1730 break; 1731 #endif 1732 default: 1733 break; 1734 } 1735 /* 1736 * ok, not bound to all so see if we can find a EP bound to this 1737 * address. 1738 */ 1739 LIST_FOREACH(inp, head, sctp_hash) { 1740 SCTP_INP_RLOCK(inp); 1741 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1742 SCTP_INP_RUNLOCK(inp); 1743 continue; 1744 } 1745 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1746 SCTP_INP_RUNLOCK(inp); 1747 continue; 1748 } 1749 /* 1750 * Ok this could be a likely candidate, look at all of its 1751 * addresses 1752 */ 1753 if (inp->sctp_lport != lport) { 1754 SCTP_INP_RUNLOCK(inp); 1755 continue; 1756 } 1757 /* does a VRF id match? */ 1758 fnd = 0; 1759 if (inp->def_vrf_id == vrf_id) 1760 fnd = 1; 1761 1762 if (!fnd) { 1763 SCTP_INP_RUNLOCK(inp); 1764 continue; 1765 } 1766 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1767 if (laddr->ifa == NULL) { 1768 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1769 __func__); 1770 continue; 1771 } 1772 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1773 (void *)laddr->ifa); 1774 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1775 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1776 continue; 1777 } 1778 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1779 /* possible, see if it matches */ 1780 switch (nam->sa_family) { 1781 #ifdef INET 1782 case AF_INET: 1783 if (sin->sin_addr.s_addr == 1784 laddr->ifa->address.sin.sin_addr.s_addr) { 1785 SCTP_INP_RUNLOCK(inp); 1786 return (inp); 1787 } 1788 break; 1789 #endif 1790 #ifdef INET6 1791 case AF_INET6: 1792 intf_addr6 = &laddr->ifa->address.sin6; 1793 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1794 intf_addr6)) { 1795 SCTP_INP_RUNLOCK(inp); 1796 return (inp); 1797 } 1798 break; 1799 #endif 1800 } 1801 } 1802 } 1803 SCTP_INP_RUNLOCK(inp); 1804 } 1805 return (NULL); 1806 } 1807 1808 1809 static struct sctp_inpcb * 1810 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1811 { 1812 struct sctppcbhead *head; 1813 struct sctp_inpcb *t_inp; 1814 int fnd; 1815 1816 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1817 SCTP_BASE_INFO(hashmark))]; 1818 LIST_FOREACH(t_inp, head, sctp_hash) { 1819 if (t_inp->sctp_lport != lport) { 1820 continue; 1821 } 1822 /* is it in the VRF in question */ 1823 fnd = 0; 1824 if (t_inp->def_vrf_id == vrf_id) 1825 fnd = 1; 1826 if (!fnd) 1827 continue; 1828 1829 /* This one is in use. */ 1830 /* check the v6/v4 binding issue */ 1831 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1832 SCTP_IPV6_V6ONLY(t_inp)) { 1833 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1834 /* collision in V6 space */ 1835 return (t_inp); 1836 } else { 1837 /* inp is BOUND_V4 no conflict */ 1838 continue; 1839 } 1840 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1841 /* t_inp is bound v4 and v6, conflict always */ 1842 return (t_inp); 1843 } else { 1844 /* t_inp is bound only V4 */ 1845 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1846 SCTP_IPV6_V6ONLY(inp)) { 1847 /* no conflict */ 1848 continue; 1849 } 1850 /* else fall through to conflict */ 1851 } 1852 return (t_inp); 1853 } 1854 return (NULL); 1855 } 1856 1857 1858 int 1859 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1860 { 1861 /* For 1-2-1 with port reuse */ 1862 struct sctppcbhead *head; 1863 struct sctp_inpcb *tinp, *ninp; 1864 1865 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1866 /* only works with port reuse on */ 1867 return (-1); 1868 } 1869 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1870 return (0); 1871 } 1872 SCTP_INP_RUNLOCK(inp); 1873 SCTP_INP_INFO_WLOCK(); 1874 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1875 SCTP_BASE_INFO(hashmark))]; 1876 /* Kick out all non-listeners to the TCP hash */ 1877 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1878 if (tinp->sctp_lport != inp->sctp_lport) { 1879 continue; 1880 } 1881 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1882 continue; 1883 } 1884 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1885 continue; 1886 } 1887 if (tinp->sctp_socket->so_qlimit) { 1888 continue; 1889 } 1890 SCTP_INP_WLOCK(tinp); 1891 LIST_REMOVE(tinp, sctp_hash); 1892 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1893 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1894 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1895 SCTP_INP_WUNLOCK(tinp); 1896 } 1897 SCTP_INP_WLOCK(inp); 1898 /* Pull from where he was */ 1899 LIST_REMOVE(inp, sctp_hash); 1900 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1901 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1902 LIST_INSERT_HEAD(head, inp, sctp_hash); 1903 SCTP_INP_WUNLOCK(inp); 1904 SCTP_INP_RLOCK(inp); 1905 SCTP_INP_INFO_WUNLOCK(); 1906 return (0); 1907 } 1908 1909 1910 struct sctp_inpcb * 1911 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1912 uint32_t vrf_id) 1913 { 1914 /* 1915 * First we check the hash table to see if someone has this port 1916 * bound with just the port. 1917 */ 1918 struct sctp_inpcb *inp; 1919 struct sctppcbhead *head; 1920 int lport; 1921 unsigned int i; 1922 #ifdef INET 1923 struct sockaddr_in *sin; 1924 #endif 1925 #ifdef INET6 1926 struct sockaddr_in6 *sin6; 1927 #endif 1928 1929 switch (nam->sa_family) { 1930 #ifdef INET 1931 case AF_INET: 1932 sin = (struct sockaddr_in *)nam; 1933 lport = sin->sin_port; 1934 break; 1935 #endif 1936 #ifdef INET6 1937 case AF_INET6: 1938 sin6 = (struct sockaddr_in6 *)nam; 1939 lport = sin6->sin6_port; 1940 break; 1941 #endif 1942 default: 1943 return (NULL); 1944 } 1945 /* 1946 * I could cheat here and just cast to one of the types but we will 1947 * do it right. It also provides the check against an Unsupported 1948 * type too. 1949 */ 1950 /* Find the head of the ALLADDR chain */ 1951 if (have_lock == 0) { 1952 SCTP_INP_INFO_RLOCK(); 1953 } 1954 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1955 SCTP_BASE_INFO(hashmark))]; 1956 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1957 1958 /* 1959 * If the TCP model exists it could be that the main listening 1960 * endpoint is gone but there still exists a connected socket for 1961 * this guy. If so we can return the first one that we find. This 1962 * may NOT be the correct one so the caller should be wary on the 1963 * returned INP. Currently the only caller that sets find_tcp_pool 1964 * is in bindx where we are verifying that a user CAN bind the 1965 * address. He either has bound it already, or someone else has, or 1966 * its open to bind, so this is good enough. 1967 */ 1968 if (inp == NULL && find_tcp_pool) { 1969 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1970 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1971 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1972 if (inp) { 1973 break; 1974 } 1975 } 1976 } 1977 if (inp) { 1978 SCTP_INP_INCR_REF(inp); 1979 } 1980 if (have_lock == 0) { 1981 SCTP_INP_INFO_RUNLOCK(); 1982 } 1983 return (inp); 1984 } 1985 1986 1987 /* 1988 * Find an association for an endpoint with the pointer to whom you want to 1989 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1990 * need to change the *to to some other struct like a mbuf... 1991 */ 1992 struct sctp_tcb * 1993 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1994 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1995 uint32_t vrf_id) 1996 { 1997 struct sctp_inpcb *inp = NULL; 1998 struct sctp_tcb *stcb; 1999 2000 SCTP_INP_INFO_RLOCK(); 2001 if (find_tcp_pool) { 2002 if (inp_p != NULL) { 2003 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2004 vrf_id); 2005 } else { 2006 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2007 vrf_id); 2008 } 2009 if (stcb != NULL) { 2010 SCTP_INP_INFO_RUNLOCK(); 2011 return (stcb); 2012 } 2013 } 2014 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2015 if (inp_p != NULL) { 2016 *inp_p = inp; 2017 } 2018 SCTP_INP_INFO_RUNLOCK(); 2019 if (inp == NULL) { 2020 return (NULL); 2021 } 2022 /* 2023 * ok, we have an endpoint, now lets find the assoc for it (if any) 2024 * we now place the source address or from in the to of the find 2025 * endpoint call. Since in reality this chain is used from the 2026 * inbound packet side. 2027 */ 2028 if (inp_p != NULL) { 2029 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2030 NULL); 2031 } else { 2032 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2033 NULL); 2034 } 2035 return (stcb); 2036 } 2037 2038 2039 /* 2040 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2041 * find all addresses that the sender has specified in any address list. Each 2042 * address will be used to lookup the TCB and see if one exits. 2043 */ 2044 static struct sctp_tcb * 2045 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2046 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2047 struct sockaddr *dst) 2048 { 2049 struct sctp_paramhdr *phdr, param_buf; 2050 #if defined(INET) || defined(INET6) 2051 struct sctp_tcb *stcb; 2052 uint16_t ptype; 2053 #endif 2054 uint16_t plen; 2055 #ifdef INET 2056 struct sockaddr_in sin4; 2057 #endif 2058 #ifdef INET6 2059 struct sockaddr_in6 sin6; 2060 #endif 2061 2062 #ifdef INET 2063 memset(&sin4, 0, sizeof(sin4)); 2064 sin4.sin_len = sizeof(sin4); 2065 sin4.sin_family = AF_INET; 2066 sin4.sin_port = sh->src_port; 2067 #endif 2068 #ifdef INET6 2069 memset(&sin6, 0, sizeof(sin6)); 2070 sin6.sin6_len = sizeof(sin6); 2071 sin6.sin6_family = AF_INET6; 2072 sin6.sin6_port = sh->src_port; 2073 #endif 2074 2075 offset += sizeof(struct sctp_init_chunk); 2076 2077 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2078 while (phdr != NULL) { 2079 /* now we must see if we want the parameter */ 2080 #if defined(INET) || defined(INET6) 2081 ptype = ntohs(phdr->param_type); 2082 #endif 2083 plen = ntohs(phdr->param_length); 2084 if (plen == 0) { 2085 break; 2086 } 2087 #ifdef INET 2088 if (ptype == SCTP_IPV4_ADDRESS && 2089 plen == sizeof(struct sctp_ipv4addr_param)) { 2090 /* Get the rest of the address */ 2091 struct sctp_ipv4addr_param ip4_param, *p4; 2092 2093 phdr = sctp_get_next_param(m, offset, 2094 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2095 if (phdr == NULL) { 2096 return (NULL); 2097 } 2098 p4 = (struct sctp_ipv4addr_param *)phdr; 2099 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2100 /* look it up */ 2101 stcb = sctp_findassociation_ep_addr(inp_p, 2102 (struct sockaddr *)&sin4, netp, dst, NULL); 2103 if (stcb != NULL) { 2104 return (stcb); 2105 } 2106 } 2107 #endif 2108 #ifdef INET6 2109 if (ptype == SCTP_IPV6_ADDRESS && 2110 plen == sizeof(struct sctp_ipv6addr_param)) { 2111 /* Get the rest of the address */ 2112 struct sctp_ipv6addr_param ip6_param, *p6; 2113 2114 phdr = sctp_get_next_param(m, offset, 2115 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2116 if (phdr == NULL) { 2117 return (NULL); 2118 } 2119 p6 = (struct sctp_ipv6addr_param *)phdr; 2120 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2121 /* look it up */ 2122 stcb = sctp_findassociation_ep_addr(inp_p, 2123 (struct sockaddr *)&sin6, netp, dst, NULL); 2124 if (stcb != NULL) { 2125 return (stcb); 2126 } 2127 } 2128 #endif 2129 offset += SCTP_SIZE32(plen); 2130 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2131 sizeof(param_buf)); 2132 } 2133 return (NULL); 2134 } 2135 2136 static struct sctp_tcb * 2137 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2138 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2139 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2140 { 2141 /* 2142 * Use my vtag to hash. If we find it we then verify the source addr 2143 * is in the assoc. If all goes well we save a bit on rec of a 2144 * packet. 2145 */ 2146 struct sctpasochead *head; 2147 struct sctp_nets *net; 2148 struct sctp_tcb *stcb; 2149 2150 SCTP_INP_INFO_RLOCK(); 2151 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2152 SCTP_BASE_INFO(hashasocmark))]; 2153 LIST_FOREACH(stcb, head, sctp_asocs) { 2154 SCTP_INP_RLOCK(stcb->sctp_ep); 2155 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2156 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2157 continue; 2158 } 2159 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2160 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2161 continue; 2162 } 2163 SCTP_TCB_LOCK(stcb); 2164 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2165 if (stcb->asoc.my_vtag == vtag) { 2166 /* candidate */ 2167 if (stcb->rport != rport) { 2168 SCTP_TCB_UNLOCK(stcb); 2169 continue; 2170 } 2171 if (stcb->sctp_ep->sctp_lport != lport) { 2172 SCTP_TCB_UNLOCK(stcb); 2173 continue; 2174 } 2175 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2176 SCTP_TCB_UNLOCK(stcb); 2177 continue; 2178 } 2179 /* RRS:Need toaddr check here */ 2180 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2181 /* Endpoint does not own this address */ 2182 SCTP_TCB_UNLOCK(stcb); 2183 continue; 2184 } 2185 if (remote_tag) { 2186 /* 2187 * If we have both vtags that's all we match 2188 * on 2189 */ 2190 if (stcb->asoc.peer_vtag == remote_tag) { 2191 /* 2192 * If both tags match we consider it 2193 * conclusive and check NO 2194 * source/destination addresses 2195 */ 2196 goto conclusive; 2197 } 2198 } 2199 if (skip_src_check) { 2200 conclusive: 2201 if (from) { 2202 *netp = sctp_findnet(stcb, from); 2203 } else { 2204 *netp = NULL; /* unknown */ 2205 } 2206 if (inp_p) 2207 *inp_p = stcb->sctp_ep; 2208 SCTP_INP_INFO_RUNLOCK(); 2209 return (stcb); 2210 } 2211 net = sctp_findnet(stcb, from); 2212 if (net) { 2213 /* yep its him. */ 2214 *netp = net; 2215 SCTP_STAT_INCR(sctps_vtagexpress); 2216 *inp_p = stcb->sctp_ep; 2217 SCTP_INP_INFO_RUNLOCK(); 2218 return (stcb); 2219 } else { 2220 /* 2221 * not him, this should only happen in rare 2222 * cases so I peg it. 2223 */ 2224 SCTP_STAT_INCR(sctps_vtagbogus); 2225 } 2226 } 2227 SCTP_TCB_UNLOCK(stcb); 2228 } 2229 SCTP_INP_INFO_RUNLOCK(); 2230 return (NULL); 2231 } 2232 2233 2234 /* 2235 * Find an association with the pointer to the inbound IP packet. This can be 2236 * a IPv4 or IPv6 packet. 2237 */ 2238 struct sctp_tcb * 2239 sctp_findassociation_addr(struct mbuf *m, int offset, 2240 struct sockaddr *src, struct sockaddr *dst, 2241 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2242 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2243 { 2244 struct sctp_tcb *stcb; 2245 struct sctp_inpcb *inp; 2246 2247 if (sh->v_tag) { 2248 /* we only go down this path if vtag is non-zero */ 2249 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2250 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2251 if (stcb) { 2252 return (stcb); 2253 } 2254 } 2255 if (inp_p) { 2256 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2257 1, vrf_id); 2258 inp = *inp_p; 2259 } else { 2260 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2261 1, vrf_id); 2262 } 2263 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2264 if (stcb == NULL && inp) { 2265 /* Found a EP but not this address */ 2266 if ((ch->chunk_type == SCTP_INITIATION) || 2267 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2268 /*- 2269 * special hook, we do NOT return linp or an 2270 * association that is linked to an existing 2271 * association that is under the TCP pool (i.e. no 2272 * listener exists). The endpoint finding routine 2273 * will always find a listener before examining the 2274 * TCP pool. 2275 */ 2276 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2277 if (inp_p) { 2278 *inp_p = NULL; 2279 } 2280 return (NULL); 2281 } 2282 stcb = sctp_findassociation_special_addr(m, 2283 offset, sh, &inp, netp, dst); 2284 if (inp_p != NULL) { 2285 *inp_p = inp; 2286 } 2287 } 2288 } 2289 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2290 return (stcb); 2291 } 2292 2293 /* 2294 * lookup an association by an ASCONF lookup address. 2295 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2296 */ 2297 struct sctp_tcb * 2298 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2299 struct sockaddr *dst, struct sctphdr *sh, 2300 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2301 { 2302 struct sctp_tcb *stcb; 2303 union sctp_sockstore remote_store; 2304 struct sctp_paramhdr param_buf, *phdr; 2305 int ptype; 2306 int zero_address = 0; 2307 #ifdef INET 2308 struct sockaddr_in *sin; 2309 #endif 2310 #ifdef INET6 2311 struct sockaddr_in6 *sin6; 2312 #endif 2313 2314 memset(&remote_store, 0, sizeof(remote_store)); 2315 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2316 ¶m_buf, sizeof(struct sctp_paramhdr)); 2317 if (phdr == NULL) { 2318 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2319 __func__); 2320 return NULL; 2321 } 2322 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2323 /* get the correlation address */ 2324 switch (ptype) { 2325 #ifdef INET6 2326 case SCTP_IPV6_ADDRESS: 2327 { 2328 /* ipv6 address param */ 2329 struct sctp_ipv6addr_param *p6, p6_buf; 2330 2331 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2332 return NULL; 2333 } 2334 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2335 offset + sizeof(struct sctp_asconf_chunk), 2336 &p6_buf.ph, sizeof(p6_buf)); 2337 if (p6 == NULL) { 2338 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2339 __func__); 2340 return (NULL); 2341 } 2342 sin6 = &remote_store.sin6; 2343 sin6->sin6_family = AF_INET6; 2344 sin6->sin6_len = sizeof(*sin6); 2345 sin6->sin6_port = sh->src_port; 2346 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2347 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2348 zero_address = 1; 2349 break; 2350 } 2351 #endif 2352 #ifdef INET 2353 case SCTP_IPV4_ADDRESS: 2354 { 2355 /* ipv4 address param */ 2356 struct sctp_ipv4addr_param *p4, p4_buf; 2357 2358 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2359 return NULL; 2360 } 2361 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2362 offset + sizeof(struct sctp_asconf_chunk), 2363 &p4_buf.ph, sizeof(p4_buf)); 2364 if (p4 == NULL) { 2365 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2366 __func__); 2367 return (NULL); 2368 } 2369 sin = &remote_store.sin; 2370 sin->sin_family = AF_INET; 2371 sin->sin_len = sizeof(*sin); 2372 sin->sin_port = sh->src_port; 2373 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2374 if (sin->sin_addr.s_addr == INADDR_ANY) 2375 zero_address = 1; 2376 break; 2377 } 2378 #endif 2379 default: 2380 /* invalid address param type */ 2381 return NULL; 2382 } 2383 2384 if (zero_address) { 2385 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2386 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2387 if (stcb != NULL) { 2388 SCTP_INP_DECR_REF(*inp_p); 2389 } 2390 } else { 2391 stcb = sctp_findassociation_ep_addr(inp_p, 2392 &remote_store.sa, netp, 2393 dst, NULL); 2394 } 2395 return (stcb); 2396 } 2397 2398 2399 /* 2400 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2401 * addresses. This way if we don't get a bind we by default pick a ephemeral 2402 * port with all addresses bound. 2403 */ 2404 int 2405 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2406 { 2407 /* 2408 * we get called when a new endpoint starts up. We need to allocate 2409 * the sctp_inpcb structure from the zone and init it. Mark it as 2410 * unbound and find a port that we can use as an ephemeral with 2411 * INADDR_ANY. If the user binds later no problem we can then add in 2412 * the specific addresses. And setup the default parameters for the 2413 * EP. 2414 */ 2415 int i, error; 2416 struct sctp_inpcb *inp; 2417 struct sctp_pcb *m; 2418 struct timeval time; 2419 sctp_sharedkey_t *null_key; 2420 2421 error = 0; 2422 2423 SCTP_INP_INFO_WLOCK(); 2424 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2425 if (inp == NULL) { 2426 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2427 SCTP_INP_INFO_WUNLOCK(); 2428 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2429 return (ENOBUFS); 2430 } 2431 /* zap it */ 2432 bzero(inp, sizeof(*inp)); 2433 2434 /* bump generations */ 2435 /* setup socket pointers */ 2436 inp->sctp_socket = so; 2437 inp->ip_inp.inp.inp_socket = so; 2438 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2439 #ifdef INET6 2440 if (INP_SOCKAF(so) == AF_INET6) { 2441 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2442 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2443 } 2444 if (MODULE_GLOBAL(ip6_v6only)) { 2445 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2446 } 2447 } 2448 #endif 2449 inp->sctp_associd_counter = 1; 2450 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2451 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2452 inp->max_cwnd = 0; 2453 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2454 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2455 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2456 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2457 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2458 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2459 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2460 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2461 inp->idata_supported = 0; 2462 2463 inp->fibnum = so->so_fibnum; 2464 /* init the small hash table we use to track asocid <-> tcb */ 2465 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2466 if (inp->sctp_asocidhash == NULL) { 2467 crfree(inp->ip_inp.inp.inp_cred); 2468 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2469 SCTP_INP_INFO_WUNLOCK(); 2470 return (ENOBUFS); 2471 } 2472 SCTP_INCR_EP_COUNT(); 2473 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2474 SCTP_INP_INFO_WUNLOCK(); 2475 2476 so->so_pcb = (caddr_t)inp; 2477 2478 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2479 /* UDP style socket */ 2480 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2481 SCTP_PCB_FLAGS_UNBOUND); 2482 /* Be sure it is NON-BLOCKING IO for UDP */ 2483 /* SCTP_SET_SO_NBIO(so); */ 2484 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2485 /* TCP style socket */ 2486 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2487 SCTP_PCB_FLAGS_UNBOUND); 2488 /* Be sure we have blocking IO by default */ 2489 SCTP_CLEAR_SO_NBIO(so); 2490 } else { 2491 /* 2492 * unsupported socket type (RAW, etc)- in case we missed it 2493 * in protosw 2494 */ 2495 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2496 so->so_pcb = NULL; 2497 crfree(inp->ip_inp.inp.inp_cred); 2498 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2499 return (EOPNOTSUPP); 2500 } 2501 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2502 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2503 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2504 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2505 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2506 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2507 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2508 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2509 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2510 } 2511 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2512 &inp->sctp_hashmark); 2513 if (inp->sctp_tcbhash == NULL) { 2514 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2515 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2516 so->so_pcb = NULL; 2517 crfree(inp->ip_inp.inp.inp_cred); 2518 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2519 return (ENOBUFS); 2520 } 2521 inp->def_vrf_id = vrf_id; 2522 2523 SCTP_INP_INFO_WLOCK(); 2524 SCTP_INP_LOCK_INIT(inp); 2525 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2526 SCTP_INP_READ_INIT(inp); 2527 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2528 /* lock the new ep */ 2529 SCTP_INP_WLOCK(inp); 2530 2531 /* add it to the info area */ 2532 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2533 SCTP_INP_INFO_WUNLOCK(); 2534 2535 TAILQ_INIT(&inp->read_queue); 2536 LIST_INIT(&inp->sctp_addr_list); 2537 2538 LIST_INIT(&inp->sctp_asoc_list); 2539 2540 #ifdef SCTP_TRACK_FREED_ASOCS 2541 /* TEMP CODE */ 2542 LIST_INIT(&inp->sctp_asoc_free_list); 2543 #endif 2544 /* Init the timer structure for signature change */ 2545 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2546 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2547 2548 /* now init the actual endpoint default data */ 2549 m = &inp->sctp_ep; 2550 2551 /* setup the base timeout information */ 2552 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2553 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2554 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2555 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2556 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2557 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2558 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2559 /* all max/min max are in ms */ 2560 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2561 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2562 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2563 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2564 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2565 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2566 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2567 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2568 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2569 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2570 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2571 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2572 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2573 2574 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2575 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2576 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2577 /* number of streams to pre-open on a association */ 2578 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2579 2580 /* Add adaptation cookie */ 2581 m->adaptation_layer_indicator = 0; 2582 m->adaptation_layer_indicator_provided = 0; 2583 2584 /* seed random number generator */ 2585 m->random_counter = 1; 2586 m->store_at = SCTP_SIGNATURE_SIZE; 2587 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2588 sctp_fill_random_store(m); 2589 2590 /* Minimum cookie size */ 2591 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2592 sizeof(struct sctp_state_cookie); 2593 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2594 2595 /* Setup the initial secret */ 2596 (void)SCTP_GETTIME_TIMEVAL(&time); 2597 m->time_of_secret_change = time.tv_sec; 2598 2599 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2600 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2601 } 2602 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2603 2604 /* How long is a cookie good for ? */ 2605 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2606 /* 2607 * Initialize authentication parameters 2608 */ 2609 m->local_hmacs = sctp_default_supported_hmaclist(); 2610 m->local_auth_chunks = sctp_alloc_chunklist(); 2611 if (inp->asconf_supported) { 2612 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2613 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2614 } 2615 m->default_dscp = 0; 2616 #ifdef INET6 2617 m->default_flowlabel = 0; 2618 #endif 2619 m->port = 0; /* encapsulation disabled by default */ 2620 LIST_INIT(&m->shared_keys); 2621 /* add default NULL key as key id 0 */ 2622 null_key = sctp_alloc_sharedkey(); 2623 sctp_insert_sharedkey(&m->shared_keys, null_key); 2624 SCTP_INP_WUNLOCK(inp); 2625 #ifdef SCTP_LOG_CLOSING 2626 sctp_log_closing(inp, NULL, 12); 2627 #endif 2628 return (error); 2629 } 2630 2631 2632 void 2633 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2634 struct sctp_tcb *stcb) 2635 { 2636 struct sctp_nets *net; 2637 uint16_t lport, rport; 2638 struct sctppcbhead *head; 2639 struct sctp_laddr *laddr, *oladdr; 2640 2641 atomic_add_int(&stcb->asoc.refcnt, 1); 2642 SCTP_TCB_UNLOCK(stcb); 2643 SCTP_INP_INFO_WLOCK(); 2644 SCTP_INP_WLOCK(old_inp); 2645 SCTP_INP_WLOCK(new_inp); 2646 SCTP_TCB_LOCK(stcb); 2647 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2648 2649 new_inp->sctp_ep.time_of_secret_change = 2650 old_inp->sctp_ep.time_of_secret_change; 2651 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2652 sizeof(old_inp->sctp_ep.secret_key)); 2653 new_inp->sctp_ep.current_secret_number = 2654 old_inp->sctp_ep.current_secret_number; 2655 new_inp->sctp_ep.last_secret_number = 2656 old_inp->sctp_ep.last_secret_number; 2657 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2658 2659 /* make it so new data pours into the new socket */ 2660 stcb->sctp_socket = new_inp->sctp_socket; 2661 stcb->sctp_ep = new_inp; 2662 2663 /* Copy the port across */ 2664 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2665 rport = stcb->rport; 2666 /* Pull the tcb from the old association */ 2667 LIST_REMOVE(stcb, sctp_tcbhash); 2668 LIST_REMOVE(stcb, sctp_tcblist); 2669 if (stcb->asoc.in_asocid_hash) { 2670 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2671 } 2672 /* Now insert the new_inp into the TCP connected hash */ 2673 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2674 2675 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2676 /* Its safe to access */ 2677 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2678 2679 /* Now move the tcb into the endpoint list */ 2680 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2681 /* 2682 * Question, do we even need to worry about the ep-hash since we 2683 * only have one connection? Probably not :> so lets get rid of it 2684 * and not suck up any kernel memory in that. 2685 */ 2686 if (stcb->asoc.in_asocid_hash) { 2687 struct sctpasochead *lhd; 2688 2689 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2690 new_inp->hashasocidmark)]; 2691 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2692 } 2693 /* Ok. Let's restart timer. */ 2694 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2695 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2696 stcb, net); 2697 } 2698 2699 SCTP_INP_INFO_WUNLOCK(); 2700 if (new_inp->sctp_tcbhash != NULL) { 2701 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2702 new_inp->sctp_tcbhash = NULL; 2703 } 2704 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2705 /* Subset bound, so copy in the laddr list from the old_inp */ 2706 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2707 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2708 if (laddr == NULL) { 2709 /* 2710 * Gak, what can we do? This assoc is really 2711 * HOSED. We probably should send an abort 2712 * here. 2713 */ 2714 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2715 continue; 2716 } 2717 SCTP_INCR_LADDR_COUNT(); 2718 bzero(laddr, sizeof(*laddr)); 2719 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2720 laddr->ifa = oladdr->ifa; 2721 atomic_add_int(&laddr->ifa->refcount, 1); 2722 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2723 sctp_nxt_addr); 2724 new_inp->laddr_count++; 2725 if (oladdr == stcb->asoc.last_used_address) { 2726 stcb->asoc.last_used_address = laddr; 2727 } 2728 } 2729 } 2730 /* 2731 * Now any running timers need to be adjusted since we really don't 2732 * care if they are running or not just blast in the new_inp into 2733 * all of them. 2734 */ 2735 2736 stcb->asoc.dack_timer.ep = (void *)new_inp; 2737 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2738 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2739 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2740 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2741 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2742 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2743 /* now what about the nets? */ 2744 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2745 net->pmtu_timer.ep = (void *)new_inp; 2746 net->hb_timer.ep = (void *)new_inp; 2747 net->rxt_timer.ep = (void *)new_inp; 2748 } 2749 SCTP_INP_WUNLOCK(new_inp); 2750 SCTP_INP_WUNLOCK(old_inp); 2751 } 2752 2753 /* 2754 * insert an laddr entry with the given ifa for the desired list 2755 */ 2756 static int 2757 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2758 { 2759 struct sctp_laddr *laddr; 2760 2761 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2762 if (laddr == NULL) { 2763 /* out of memory? */ 2764 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2765 return (EINVAL); 2766 } 2767 SCTP_INCR_LADDR_COUNT(); 2768 bzero(laddr, sizeof(*laddr)); 2769 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2770 laddr->ifa = ifa; 2771 laddr->action = act; 2772 atomic_add_int(&ifa->refcount, 1); 2773 /* insert it */ 2774 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2775 2776 return (0); 2777 } 2778 2779 /* 2780 * Remove an laddr entry from the local address list (on an assoc) 2781 */ 2782 static void 2783 sctp_remove_laddr(struct sctp_laddr *laddr) 2784 { 2785 2786 /* remove from the list */ 2787 LIST_REMOVE(laddr, sctp_nxt_addr); 2788 sctp_free_ifa(laddr->ifa); 2789 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2790 SCTP_DECR_LADDR_COUNT(); 2791 } 2792 2793 2794 2795 /* sctp_ifap is used to bypass normal local address validation checks */ 2796 int 2797 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2798 struct sctp_ifa *sctp_ifap, struct thread *p) 2799 { 2800 /* bind a ep to a socket address */ 2801 struct sctppcbhead *head; 2802 struct sctp_inpcb *inp, *inp_tmp; 2803 struct inpcb *ip_inp; 2804 int port_reuse_active = 0; 2805 int bindall; 2806 uint16_t lport; 2807 int error; 2808 uint32_t vrf_id; 2809 2810 lport = 0; 2811 bindall = 1; 2812 inp = (struct sctp_inpcb *)so->so_pcb; 2813 ip_inp = (struct inpcb *)so->so_pcb; 2814 #ifdef SCTP_DEBUG 2815 if (addr) { 2816 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2817 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2818 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2819 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2820 } 2821 #endif 2822 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2823 /* already did a bind, subsequent binds NOT allowed ! */ 2824 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2825 return (EINVAL); 2826 } 2827 #ifdef INVARIANTS 2828 if (p == NULL) 2829 panic("null proc/thread"); 2830 #endif 2831 if (addr != NULL) { 2832 switch (addr->sa_family) { 2833 #ifdef INET 2834 case AF_INET: 2835 { 2836 struct sockaddr_in *sin; 2837 2838 /* IPV6_V6ONLY socket? */ 2839 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2840 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2841 return (EINVAL); 2842 } 2843 if (addr->sa_len != sizeof(*sin)) { 2844 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2845 return (EINVAL); 2846 } 2847 sin = (struct sockaddr_in *)addr; 2848 lport = sin->sin_port; 2849 /* 2850 * For LOOPBACK the prison_local_ip4() call 2851 * will transmute the ip address to the 2852 * proper value. 2853 */ 2854 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2855 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2856 return (error); 2857 } 2858 if (sin->sin_addr.s_addr != INADDR_ANY) { 2859 bindall = 0; 2860 } 2861 break; 2862 } 2863 #endif 2864 #ifdef INET6 2865 case AF_INET6: 2866 { 2867 /* 2868 * Only for pure IPv6 Address. (No IPv4 2869 * Mapped!) 2870 */ 2871 struct sockaddr_in6 *sin6; 2872 2873 sin6 = (struct sockaddr_in6 *)addr; 2874 2875 if (addr->sa_len != sizeof(*sin6)) { 2876 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2877 return (EINVAL); 2878 } 2879 lport = sin6->sin6_port; 2880 /* 2881 * For LOOPBACK the prison_local_ip6() call 2882 * will transmute the ipv6 address to the 2883 * proper value. 2884 */ 2885 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2886 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2887 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2888 return (error); 2889 } 2890 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2891 bindall = 0; 2892 /* KAME hack: embed scopeid */ 2893 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2894 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2895 return (EINVAL); 2896 } 2897 } 2898 /* this must be cleared for ifa_ifwithaddr() */ 2899 sin6->sin6_scope_id = 0; 2900 break; 2901 } 2902 #endif 2903 default: 2904 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2905 return (EAFNOSUPPORT); 2906 } 2907 } 2908 SCTP_INP_INFO_WLOCK(); 2909 SCTP_INP_WLOCK(inp); 2910 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2911 vrf_id = inp->def_vrf_id; 2912 2913 /* increase our count due to the unlock we do */ 2914 SCTP_INP_INCR_REF(inp); 2915 if (lport) { 2916 /* 2917 * Did the caller specify a port? if so we must see if an ep 2918 * already has this one bound. 2919 */ 2920 /* got to be root to get at low ports */ 2921 if (ntohs(lport) < IPPORT_RESERVED) { 2922 if (p && (error = 2923 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2924 )) { 2925 SCTP_INP_DECR_REF(inp); 2926 SCTP_INP_WUNLOCK(inp); 2927 SCTP_INP_INFO_WUNLOCK(); 2928 return (error); 2929 } 2930 } 2931 SCTP_INP_WUNLOCK(inp); 2932 if (bindall) { 2933 vrf_id = inp->def_vrf_id; 2934 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2935 if (inp_tmp != NULL) { 2936 /* 2937 * lock guy returned and lower count note 2938 * that we are not bound so inp_tmp should 2939 * NEVER be inp. And it is this inp 2940 * (inp_tmp) that gets the reference bump, 2941 * so we must lower it. 2942 */ 2943 SCTP_INP_DECR_REF(inp_tmp); 2944 /* unlock info */ 2945 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2946 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2947 /* 2948 * Ok, must be one-2-one and 2949 * allowing port re-use 2950 */ 2951 port_reuse_active = 1; 2952 goto continue_anyway; 2953 } 2954 SCTP_INP_DECR_REF(inp); 2955 SCTP_INP_INFO_WUNLOCK(); 2956 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2957 return (EADDRINUSE); 2958 } 2959 } else { 2960 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2961 if (inp_tmp != NULL) { 2962 /* 2963 * lock guy returned and lower count note 2964 * that we are not bound so inp_tmp should 2965 * NEVER be inp. And it is this inp 2966 * (inp_tmp) that gets the reference bump, 2967 * so we must lower it. 2968 */ 2969 SCTP_INP_DECR_REF(inp_tmp); 2970 /* unlock info */ 2971 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2972 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2973 /* 2974 * Ok, must be one-2-one and 2975 * allowing port re-use 2976 */ 2977 port_reuse_active = 1; 2978 goto continue_anyway; 2979 } 2980 SCTP_INP_DECR_REF(inp); 2981 SCTP_INP_INFO_WUNLOCK(); 2982 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2983 return (EADDRINUSE); 2984 } 2985 } 2986 continue_anyway: 2987 SCTP_INP_WLOCK(inp); 2988 if (bindall) { 2989 /* verify that no lport is not used by a singleton */ 2990 if ((port_reuse_active == 0) && 2991 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2992 /* Sorry someone already has this one bound */ 2993 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2994 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2995 port_reuse_active = 1; 2996 } else { 2997 SCTP_INP_DECR_REF(inp); 2998 SCTP_INP_WUNLOCK(inp); 2999 SCTP_INP_INFO_WUNLOCK(); 3000 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3001 return (EADDRINUSE); 3002 } 3003 } 3004 } 3005 } else { 3006 uint16_t first, last, candidate; 3007 uint16_t count; 3008 int done; 3009 3010 if (ip_inp->inp_flags & INP_HIGHPORT) { 3011 first = MODULE_GLOBAL(ipport_hifirstauto); 3012 last = MODULE_GLOBAL(ipport_hilastauto); 3013 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3014 if (p && (error = 3015 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3016 )) { 3017 SCTP_INP_DECR_REF(inp); 3018 SCTP_INP_WUNLOCK(inp); 3019 SCTP_INP_INFO_WUNLOCK(); 3020 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3021 return (error); 3022 } 3023 first = MODULE_GLOBAL(ipport_lowfirstauto); 3024 last = MODULE_GLOBAL(ipport_lowlastauto); 3025 } else { 3026 first = MODULE_GLOBAL(ipport_firstauto); 3027 last = MODULE_GLOBAL(ipport_lastauto); 3028 } 3029 if (first > last) { 3030 uint16_t temp; 3031 3032 temp = first; 3033 first = last; 3034 last = temp; 3035 } 3036 count = last - first + 1; /* number of candidates */ 3037 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3038 3039 done = 0; 3040 while (!done) { 3041 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3042 done = 1; 3043 } 3044 if (!done) { 3045 if (--count == 0) { 3046 SCTP_INP_DECR_REF(inp); 3047 SCTP_INP_WUNLOCK(inp); 3048 SCTP_INP_INFO_WUNLOCK(); 3049 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3050 return (EADDRINUSE); 3051 } 3052 if (candidate == last) 3053 candidate = first; 3054 else 3055 candidate = candidate + 1; 3056 } 3057 } 3058 lport = htons(candidate); 3059 } 3060 SCTP_INP_DECR_REF(inp); 3061 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3062 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3063 /* 3064 * this really should not happen. The guy did a non-blocking 3065 * bind and then did a close at the same time. 3066 */ 3067 SCTP_INP_WUNLOCK(inp); 3068 SCTP_INP_INFO_WUNLOCK(); 3069 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3070 return (EINVAL); 3071 } 3072 /* ok we look clear to give out this port, so lets setup the binding */ 3073 if (bindall) { 3074 /* binding to all addresses, so just set in the proper flags */ 3075 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3076 /* set the automatic addr changes from kernel flag */ 3077 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3078 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3079 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3080 } else { 3081 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3082 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3083 } 3084 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3085 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3086 } else { 3087 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3088 } 3089 /* 3090 * set the automatic mobility_base from kernel flag (by 3091 * micchie) 3092 */ 3093 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3094 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3095 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3096 } else { 3097 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3098 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3099 } 3100 /* 3101 * set the automatic mobility_fasthandoff from kernel flag 3102 * (by micchie) 3103 */ 3104 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3106 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3107 } else { 3108 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3109 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3110 } 3111 } else { 3112 /* 3113 * bind specific, make sure flags is off and add a new 3114 * address structure to the sctp_addr_list inside the ep 3115 * structure. 3116 * 3117 * We will need to allocate one and insert it at the head. 3118 * The socketopt call can just insert new addresses in there 3119 * as well. It will also have to do the embed scope kame 3120 * hack too (before adding). 3121 */ 3122 struct sctp_ifa *ifa; 3123 union sctp_sockstore store; 3124 3125 memset(&store, 0, sizeof(store)); 3126 switch (addr->sa_family) { 3127 #ifdef INET 3128 case AF_INET: 3129 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3130 store.sin.sin_port = 0; 3131 break; 3132 #endif 3133 #ifdef INET6 3134 case AF_INET6: 3135 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3136 store.sin6.sin6_port = 0; 3137 break; 3138 #endif 3139 default: 3140 break; 3141 } 3142 /* 3143 * first find the interface with the bound address need to 3144 * zero out the port to find the address! yuck! can't do 3145 * this earlier since need port for sctp_pcb_findep() 3146 */ 3147 if (sctp_ifap != NULL) { 3148 ifa = sctp_ifap; 3149 } else { 3150 /* 3151 * Note for BSD we hit here always other O/S's will 3152 * pass things in via the sctp_ifap argument 3153 * (Panda). 3154 */ 3155 ifa = sctp_find_ifa_by_addr(&store.sa, 3156 vrf_id, SCTP_ADDR_NOT_LOCKED); 3157 } 3158 if (ifa == NULL) { 3159 /* Can't find an interface with that address */ 3160 SCTP_INP_WUNLOCK(inp); 3161 SCTP_INP_INFO_WUNLOCK(); 3162 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3163 return (EADDRNOTAVAIL); 3164 } 3165 #ifdef INET6 3166 if (addr->sa_family == AF_INET6) { 3167 /* GAK, more FIXME IFA lock? */ 3168 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3169 /* Can't bind a non-existent addr. */ 3170 SCTP_INP_WUNLOCK(inp); 3171 SCTP_INP_INFO_WUNLOCK(); 3172 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3173 return (EINVAL); 3174 } 3175 } 3176 #endif 3177 /* we're not bound all */ 3178 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3179 /* allow bindx() to send ASCONF's for binding changes */ 3180 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3181 /* clear automatic addr changes from kernel flag */ 3182 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3183 3184 /* add this address to the endpoint list */ 3185 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3186 if (error != 0) { 3187 SCTP_INP_WUNLOCK(inp); 3188 SCTP_INP_INFO_WUNLOCK(); 3189 return (error); 3190 } 3191 inp->laddr_count++; 3192 } 3193 /* find the bucket */ 3194 if (port_reuse_active) { 3195 /* Put it into tcp 1-2-1 hash */ 3196 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3197 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3198 } else { 3199 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3200 } 3201 /* put it in the bucket */ 3202 LIST_INSERT_HEAD(head, inp, sctp_hash); 3203 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3204 (void *)head, ntohs(lport), port_reuse_active); 3205 /* set in the port */ 3206 inp->sctp_lport = lport; 3207 3208 /* turn off just the unbound flag */ 3209 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3210 SCTP_INP_WUNLOCK(inp); 3211 SCTP_INP_INFO_WUNLOCK(); 3212 return (0); 3213 } 3214 3215 3216 static void 3217 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3218 { 3219 struct sctp_iterator *it, *nit; 3220 3221 /* 3222 * We enter with the only the ITERATOR_LOCK in place and a write 3223 * lock on the inp_info stuff. 3224 */ 3225 it = sctp_it_ctl.cur_it; 3226 if (it && (it->vn != curvnet)) { 3227 /* Its not looking at our VNET */ 3228 return; 3229 } 3230 if (it && (it->inp == inp)) { 3231 /* 3232 * This is tricky and we hold the iterator lock, but when it 3233 * returns and gets the lock (when we release it) the 3234 * iterator will try to operate on inp. We need to stop that 3235 * from happening. But of course the iterator has a 3236 * reference on the stcb and inp. We can mark it and it will 3237 * stop. 3238 * 3239 * If its a single iterator situation, we set the end 3240 * iterator flag. Otherwise we set the iterator to go to the 3241 * next inp. 3242 * 3243 */ 3244 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3245 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3246 } else { 3247 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3248 } 3249 } 3250 /* 3251 * Now go through and remove any single reference to our inp that 3252 * may be still pending on the list 3253 */ 3254 SCTP_IPI_ITERATOR_WQ_LOCK(); 3255 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3256 if (it->vn != curvnet) { 3257 continue; 3258 } 3259 if (it->inp == inp) { 3260 /* This one points to me is it inp specific? */ 3261 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3262 /* Remove and free this one */ 3263 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3264 it, sctp_nxt_itr); 3265 if (it->function_atend != NULL) { 3266 (*it->function_atend) (it->pointer, it->val); 3267 } 3268 SCTP_FREE(it, SCTP_M_ITER); 3269 } else { 3270 it->inp = LIST_NEXT(it->inp, sctp_list); 3271 if (it->inp) { 3272 SCTP_INP_INCR_REF(it->inp); 3273 } 3274 } 3275 /* 3276 * When its put in the refcnt is incremented so decr 3277 * it 3278 */ 3279 SCTP_INP_DECR_REF(inp); 3280 } 3281 } 3282 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3283 } 3284 3285 /* release sctp_inpcb unbind the port */ 3286 void 3287 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3288 { 3289 /* 3290 * Here we free a endpoint. We must find it (if it is in the Hash 3291 * table) and remove it from there. Then we must also find it in the 3292 * overall list and remove it from there. After all removals are 3293 * complete then any timer has to be stopped. Then start the actual 3294 * freeing. a) Any local lists. b) Any associations. c) The hash of 3295 * all associations. d) finally the ep itself. 3296 */ 3297 struct sctp_tcb *asoc, *nasoc; 3298 struct sctp_laddr *laddr, *nladdr; 3299 struct inpcb *ip_pcb; 3300 struct socket *so; 3301 int being_refed = 0; 3302 struct sctp_queued_to_read *sq, *nsq; 3303 int cnt; 3304 sctp_sharedkey_t *shared_key, *nshared_key; 3305 3306 3307 #ifdef SCTP_LOG_CLOSING 3308 sctp_log_closing(inp, NULL, 0); 3309 #endif 3310 SCTP_ITERATOR_LOCK(); 3311 /* mark any iterators on the list or being processed */ 3312 sctp_iterator_inp_being_freed(inp); 3313 SCTP_ITERATOR_UNLOCK(); 3314 so = inp->sctp_socket; 3315 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3316 /* been here before.. eeks.. get out of here */ 3317 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3318 #ifdef SCTP_LOG_CLOSING 3319 sctp_log_closing(inp, NULL, 1); 3320 #endif 3321 return; 3322 } 3323 SCTP_ASOC_CREATE_LOCK(inp); 3324 SCTP_INP_INFO_WLOCK(); 3325 3326 SCTP_INP_WLOCK(inp); 3327 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3328 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3329 /* socket is gone, so no more wakeups allowed */ 3330 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3331 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3332 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3333 3334 } 3335 /* First time through we have the socket lock, after that no more. */ 3336 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3337 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3338 3339 if (inp->control) { 3340 sctp_m_freem(inp->control); 3341 inp->control = NULL; 3342 } 3343 if (inp->pkt) { 3344 sctp_m_freem(inp->pkt); 3345 inp->pkt = NULL; 3346 } 3347 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3348 * here but I will be nice :> (i.e. 3349 * ip_pcb = ep;) */ 3350 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3351 int cnt_in_sd; 3352 3353 cnt_in_sd = 0; 3354 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3355 SCTP_TCB_LOCK(asoc); 3356 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3357 /* Skip guys being freed */ 3358 cnt_in_sd++; 3359 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3360 /* 3361 * Special case - we did not start a 3362 * kill timer on the asoc due to it 3363 * was not closed. So go ahead and 3364 * start it now. 3365 */ 3366 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3367 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3368 } 3369 SCTP_TCB_UNLOCK(asoc); 3370 continue; 3371 } 3372 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3373 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3374 (asoc->asoc.total_output_queue_size == 0)) { 3375 /* 3376 * If we have data in queue, we don't want 3377 * to just free since the app may have done, 3378 * send()/close or connect/send/close. And 3379 * it wants the data to get across first. 3380 */ 3381 /* Just abandon things in the front states */ 3382 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3383 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3384 cnt_in_sd++; 3385 } 3386 continue; 3387 } 3388 /* Disconnect the socket please */ 3389 asoc->sctp_socket = NULL; 3390 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3391 if ((asoc->asoc.size_on_reasm_queue > 0) || 3392 (asoc->asoc.control_pdapi) || 3393 (asoc->asoc.size_on_all_streams > 0) || 3394 (so && (so->so_rcv.sb_cc > 0))) { 3395 /* Left with Data unread */ 3396 struct mbuf *op_err; 3397 3398 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3399 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3400 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3401 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3402 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3403 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3404 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3405 } 3406 if (sctp_free_assoc(inp, asoc, 3407 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3408 cnt_in_sd++; 3409 } 3410 continue; 3411 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3412 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3413 (asoc->asoc.stream_queue_cnt == 0)) { 3414 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3415 goto abort_anyway; 3416 } 3417 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3418 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3419 struct sctp_nets *netp; 3420 3421 /* 3422 * there is nothing queued to send, 3423 * so I send shutdown 3424 */ 3425 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3426 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3427 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3428 } 3429 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3430 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3431 sctp_stop_timers_for_shutdown(asoc); 3432 if (asoc->asoc.alternate) { 3433 netp = asoc->asoc.alternate; 3434 } else { 3435 netp = asoc->asoc.primary_destination; 3436 } 3437 sctp_send_shutdown(asoc, netp); 3438 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3439 netp); 3440 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3441 asoc->asoc.primary_destination); 3442 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3443 } 3444 } else { 3445 /* mark into shutdown pending */ 3446 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3447 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3448 asoc->asoc.primary_destination); 3449 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3450 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3451 } 3452 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3453 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3454 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3455 struct mbuf *op_err; 3456 3457 abort_anyway: 3458 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3459 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3460 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3461 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3462 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3463 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3464 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3465 } 3466 if (sctp_free_assoc(inp, asoc, 3467 SCTP_PCBFREE_NOFORCE, 3468 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3469 cnt_in_sd++; 3470 } 3471 continue; 3472 } else { 3473 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3474 } 3475 } 3476 cnt_in_sd++; 3477 SCTP_TCB_UNLOCK(asoc); 3478 } 3479 /* now is there some left in our SHUTDOWN state? */ 3480 if (cnt_in_sd) { 3481 #ifdef SCTP_LOG_CLOSING 3482 sctp_log_closing(inp, NULL, 2); 3483 #endif 3484 inp->sctp_socket = NULL; 3485 SCTP_INP_WUNLOCK(inp); 3486 SCTP_ASOC_CREATE_UNLOCK(inp); 3487 SCTP_INP_INFO_WUNLOCK(); 3488 return; 3489 } 3490 } 3491 inp->sctp_socket = NULL; 3492 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3493 SCTP_PCB_FLAGS_UNBOUND) { 3494 /* 3495 * ok, this guy has been bound. It's port is somewhere in 3496 * the SCTP_BASE_INFO(hash table). Remove it! 3497 */ 3498 LIST_REMOVE(inp, sctp_hash); 3499 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3500 } 3501 /* 3502 * If there is a timer running to kill us, forget it, since it may 3503 * have a contest on the INP lock.. which would cause us to die ... 3504 */ 3505 cnt = 0; 3506 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3507 SCTP_TCB_LOCK(asoc); 3508 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3509 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3510 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3511 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3512 } 3513 cnt++; 3514 SCTP_TCB_UNLOCK(asoc); 3515 continue; 3516 } 3517 /* Free associations that are NOT killing us */ 3518 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3519 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3520 struct mbuf *op_err; 3521 3522 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3523 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3524 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3525 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3526 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3527 cnt++; 3528 SCTP_TCB_UNLOCK(asoc); 3529 continue; 3530 } 3531 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3532 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3533 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3534 } 3535 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3536 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3537 cnt++; 3538 } 3539 } 3540 if (cnt) { 3541 /* Ok we have someone out there that will kill us */ 3542 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3543 #ifdef SCTP_LOG_CLOSING 3544 sctp_log_closing(inp, NULL, 3); 3545 #endif 3546 SCTP_INP_WUNLOCK(inp); 3547 SCTP_ASOC_CREATE_UNLOCK(inp); 3548 SCTP_INP_INFO_WUNLOCK(); 3549 return; 3550 } 3551 if (SCTP_INP_LOCK_CONTENDED(inp)) 3552 being_refed++; 3553 if (SCTP_INP_READ_CONTENDED(inp)) 3554 being_refed++; 3555 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3556 being_refed++; 3557 3558 if ((inp->refcount) || 3559 (being_refed) || 3560 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3561 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3562 #ifdef SCTP_LOG_CLOSING 3563 sctp_log_closing(inp, NULL, 4); 3564 #endif 3565 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3566 SCTP_INP_WUNLOCK(inp); 3567 SCTP_ASOC_CREATE_UNLOCK(inp); 3568 SCTP_INP_INFO_WUNLOCK(); 3569 return; 3570 } 3571 inp->sctp_ep.signature_change.type = 0; 3572 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3573 /* 3574 * Remove it from the list .. last thing we need a lock for. 3575 */ 3576 LIST_REMOVE(inp, sctp_list); 3577 SCTP_INP_WUNLOCK(inp); 3578 SCTP_ASOC_CREATE_UNLOCK(inp); 3579 SCTP_INP_INFO_WUNLOCK(); 3580 /* 3581 * Now we release all locks. Since this INP cannot be found anymore 3582 * except possibly by the kill timer that might be running. We call 3583 * the drain function here. It should hit the case were it sees the 3584 * ACTIVE flag cleared and exit out freeing us to proceed and 3585 * destroy everything. 3586 */ 3587 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3588 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3589 } else { 3590 /* Probably un-needed */ 3591 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3592 } 3593 3594 #ifdef SCTP_LOG_CLOSING 3595 sctp_log_closing(inp, NULL, 5); 3596 #endif 3597 3598 3599 if ((inp->sctp_asocidhash) != NULL) { 3600 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3601 inp->sctp_asocidhash = NULL; 3602 } 3603 /* sa_ignore FREED_MEMORY */ 3604 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3605 /* Its only abandoned if it had data left */ 3606 if (sq->length) 3607 SCTP_STAT_INCR(sctps_left_abandon); 3608 3609 TAILQ_REMOVE(&inp->read_queue, sq, next); 3610 sctp_free_remote_addr(sq->whoFrom); 3611 if (so) 3612 so->so_rcv.sb_cc -= sq->length; 3613 if (sq->data) { 3614 sctp_m_freem(sq->data); 3615 sq->data = NULL; 3616 } 3617 /* 3618 * no need to free the net count, since at this point all 3619 * assoc's are gone. 3620 */ 3621 sctp_free_a_readq(NULL, sq); 3622 } 3623 /* Now the sctp_pcb things */ 3624 /* 3625 * free each asoc if it is not already closed/free. we can't use the 3626 * macro here since le_next will get freed as part of the 3627 * sctp_free_assoc() call. 3628 */ 3629 if (ip_pcb->inp_options) { 3630 (void)sctp_m_free(ip_pcb->inp_options); 3631 ip_pcb->inp_options = 0; 3632 } 3633 #ifdef INET6 3634 if (ip_pcb->inp_vflag & INP_IPV6) { 3635 struct in6pcb *in6p; 3636 3637 in6p = (struct in6pcb *)inp; 3638 ip6_freepcbopts(in6p->in6p_outputopts); 3639 } 3640 #endif /* INET6 */ 3641 ip_pcb->inp_vflag = 0; 3642 /* free up authentication fields */ 3643 if (inp->sctp_ep.local_auth_chunks != NULL) 3644 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3645 if (inp->sctp_ep.local_hmacs != NULL) 3646 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3647 3648 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3649 LIST_REMOVE(shared_key, next); 3650 sctp_free_sharedkey(shared_key); 3651 /* sa_ignore FREED_MEMORY */ 3652 } 3653 3654 /* 3655 * if we have an address list the following will free the list of 3656 * ifaddr's that are set into this ep. Again macro limitations here, 3657 * since the LIST_FOREACH could be a bad idea. 3658 */ 3659 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3660 sctp_remove_laddr(laddr); 3661 } 3662 3663 #ifdef SCTP_TRACK_FREED_ASOCS 3664 /* TEMP CODE */ 3665 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3666 LIST_REMOVE(asoc, sctp_tcblist); 3667 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3668 SCTP_DECR_ASOC_COUNT(); 3669 } 3670 /* *** END TEMP CODE *** */ 3671 #endif 3672 /* Now lets see about freeing the EP hash table. */ 3673 if (inp->sctp_tcbhash != NULL) { 3674 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3675 inp->sctp_tcbhash = NULL; 3676 } 3677 /* Now we must put the ep memory back into the zone pool */ 3678 crfree(inp->ip_inp.inp.inp_cred); 3679 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3680 SCTP_INP_LOCK_DESTROY(inp); 3681 SCTP_INP_READ_DESTROY(inp); 3682 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3683 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3684 SCTP_DECR_EP_COUNT(); 3685 } 3686 3687 3688 struct sctp_nets * 3689 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3690 { 3691 struct sctp_nets *net; 3692 3693 /* locate the address */ 3694 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3695 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3696 return (net); 3697 } 3698 return (NULL); 3699 } 3700 3701 3702 int 3703 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3704 { 3705 struct sctp_ifa *sctp_ifa; 3706 3707 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3708 if (sctp_ifa) { 3709 return (1); 3710 } else { 3711 return (0); 3712 } 3713 } 3714 3715 /* 3716 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3717 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3718 * stats of stuff. 3719 */ 3720 int 3721 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3722 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3723 { 3724 /* 3725 * The following is redundant to the same lines in the 3726 * sctp_aloc_assoc() but is needed since others call the add address 3727 * function 3728 */ 3729 struct sctp_nets *net, *netfirst; 3730 int addr_inscope; 3731 3732 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3733 from); 3734 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3735 3736 netfirst = sctp_findnet(stcb, newaddr); 3737 if (netfirst) { 3738 /* 3739 * Lie and return ok, we don't want to make the association 3740 * go away for this behavior. It will happen in the TCP 3741 * model in a connected socket. It does not reach the hash 3742 * table until after the association is built so it can't be 3743 * found. Mark as reachable, since the initial creation will 3744 * have been cleared and the NOT_IN_ASSOC flag will have 3745 * been added... and we don't want to end up removing it 3746 * back out. 3747 */ 3748 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3749 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3750 SCTP_ADDR_UNCONFIRMED); 3751 } else { 3752 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3753 } 3754 3755 return (0); 3756 } 3757 addr_inscope = 1; 3758 switch (newaddr->sa_family) { 3759 #ifdef INET 3760 case AF_INET: 3761 { 3762 struct sockaddr_in *sin; 3763 3764 sin = (struct sockaddr_in *)newaddr; 3765 if (sin->sin_addr.s_addr == 0) { 3766 /* Invalid address */ 3767 return (-1); 3768 } 3769 /* zero out the bzero area */ 3770 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3771 3772 /* assure len is set */ 3773 sin->sin_len = sizeof(struct sockaddr_in); 3774 if (set_scope) { 3775 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3776 stcb->asoc.scope.ipv4_local_scope = 1; 3777 } 3778 } else { 3779 /* Validate the address is in scope */ 3780 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3781 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3782 addr_inscope = 0; 3783 } 3784 } 3785 break; 3786 } 3787 #endif 3788 #ifdef INET6 3789 case AF_INET6: 3790 { 3791 struct sockaddr_in6 *sin6; 3792 3793 sin6 = (struct sockaddr_in6 *)newaddr; 3794 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3795 /* Invalid address */ 3796 return (-1); 3797 } 3798 /* assure len is set */ 3799 sin6->sin6_len = sizeof(struct sockaddr_in6); 3800 if (set_scope) { 3801 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3802 stcb->asoc.scope.loopback_scope = 1; 3803 stcb->asoc.scope.local_scope = 0; 3804 stcb->asoc.scope.ipv4_local_scope = 1; 3805 stcb->asoc.scope.site_scope = 1; 3806 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3807 /* 3808 * If the new destination is a 3809 * LINK_LOCAL we must have common 3810 * site scope. Don't set the local 3811 * scope since we may not share all 3812 * links, only loopback can do this. 3813 * Links on the local network would 3814 * also be on our private network 3815 * for v4 too. 3816 */ 3817 stcb->asoc.scope.ipv4_local_scope = 1; 3818 stcb->asoc.scope.site_scope = 1; 3819 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3820 /* 3821 * If the new destination is 3822 * SITE_LOCAL then we must have site 3823 * scope in common. 3824 */ 3825 stcb->asoc.scope.site_scope = 1; 3826 } 3827 } else { 3828 /* Validate the address is in scope */ 3829 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3830 (stcb->asoc.scope.loopback_scope == 0)) { 3831 addr_inscope = 0; 3832 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3833 (stcb->asoc.scope.local_scope == 0)) { 3834 addr_inscope = 0; 3835 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3836 (stcb->asoc.scope.site_scope == 0)) { 3837 addr_inscope = 0; 3838 } 3839 } 3840 break; 3841 } 3842 #endif 3843 default: 3844 /* not supported family type */ 3845 return (-1); 3846 } 3847 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3848 if (net == NULL) { 3849 return (-1); 3850 } 3851 SCTP_INCR_RADDR_COUNT(); 3852 bzero(net, sizeof(struct sctp_nets)); 3853 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3854 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3855 switch (newaddr->sa_family) { 3856 #ifdef INET 3857 case AF_INET: 3858 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3859 break; 3860 #endif 3861 #ifdef INET6 3862 case AF_INET6: 3863 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3864 break; 3865 #endif 3866 default: 3867 break; 3868 } 3869 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3870 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3871 stcb->asoc.scope.loopback_scope = 1; 3872 stcb->asoc.scope.ipv4_local_scope = 1; 3873 stcb->asoc.scope.local_scope = 0; 3874 stcb->asoc.scope.site_scope = 1; 3875 addr_inscope = 1; 3876 } 3877 net->failure_threshold = stcb->asoc.def_net_failure; 3878 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3879 if (addr_inscope == 0) { 3880 net->dest_state = (SCTP_ADDR_REACHABLE | 3881 SCTP_ADDR_OUT_OF_SCOPE); 3882 } else { 3883 if (from == SCTP_ADDR_IS_CONFIRMED) 3884 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3885 net->dest_state = SCTP_ADDR_REACHABLE; 3886 else 3887 net->dest_state = SCTP_ADDR_REACHABLE | 3888 SCTP_ADDR_UNCONFIRMED; 3889 } 3890 /* 3891 * We set this to 0, the timer code knows that this means its an 3892 * initial value 3893 */ 3894 net->rto_needed = 1; 3895 net->RTO = 0; 3896 net->RTO_measured = 0; 3897 stcb->asoc.numnets++; 3898 net->ref_count = 1; 3899 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3900 net->port = port; 3901 net->dscp = stcb->asoc.default_dscp; 3902 #ifdef INET6 3903 net->flowlabel = stcb->asoc.default_flowlabel; 3904 #endif 3905 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3906 net->dest_state |= SCTP_ADDR_NOHB; 3907 } else { 3908 net->dest_state &= ~SCTP_ADDR_NOHB; 3909 } 3910 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3911 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3912 } else { 3913 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3914 } 3915 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3916 /* Init the timer structure */ 3917 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3918 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3919 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3920 3921 /* Now generate a route for this guy */ 3922 #ifdef INET6 3923 /* KAME hack: embed scopeid */ 3924 if (newaddr->sa_family == AF_INET6) { 3925 struct sockaddr_in6 *sin6; 3926 3927 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3928 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3929 sin6->sin6_scope_id = 0; 3930 } 3931 #endif 3932 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3933 stcb->asoc.vrf_id, 3934 stcb->sctp_ep->fibnum); 3935 3936 net->src_addr_selected = 0; 3937 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3938 /* Get source address */ 3939 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3940 stcb, 3941 (sctp_route_t *)&net->ro, 3942 net, 3943 0, 3944 stcb->asoc.vrf_id); 3945 if (net->ro._s_addr != NULL) { 3946 uint32_t imtu, rmtu, hcmtu; 3947 3948 net->src_addr_selected = 1; 3949 /* Now get the interface MTU */ 3950 if (net->ro._s_addr->ifn_p != NULL) { 3951 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3952 } else { 3953 imtu = 0; 3954 } 3955 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3956 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3957 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3958 if (rmtu == 0) { 3959 /* 3960 * Start things off to match mtu of 3961 * interface please. 3962 */ 3963 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3964 net->ro.ro_rt, net->mtu); 3965 } 3966 } 3967 } 3968 if (net->mtu == 0) { 3969 switch (newaddr->sa_family) { 3970 #ifdef INET 3971 case AF_INET: 3972 net->mtu = SCTP_DEFAULT_MTU; 3973 break; 3974 #endif 3975 #ifdef INET6 3976 case AF_INET6: 3977 net->mtu = 1280; 3978 break; 3979 #endif 3980 default: 3981 break; 3982 } 3983 } 3984 #if defined(INET) || defined(INET6) 3985 if (net->port) { 3986 net->mtu -= (uint32_t)sizeof(struct udphdr); 3987 } 3988 #endif 3989 if (from == SCTP_ALLOC_ASOC) { 3990 stcb->asoc.smallest_mtu = net->mtu; 3991 } 3992 if (stcb->asoc.smallest_mtu > net->mtu) { 3993 sctp_pathmtu_adjustment(stcb, net->mtu); 3994 } 3995 #ifdef INET6 3996 if (newaddr->sa_family == AF_INET6) { 3997 struct sockaddr_in6 *sin6; 3998 3999 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4000 (void)sa6_recoverscope(sin6); 4001 } 4002 #endif 4003 4004 /* JRS - Use the congestion control given in the CC module */ 4005 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4006 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4007 4008 /* 4009 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4010 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4011 */ 4012 net->find_pseudo_cumack = 1; 4013 net->find_rtx_pseudo_cumack = 1; 4014 /* Choose an initial flowid. */ 4015 net->flowid = stcb->asoc.my_vtag ^ 4016 ntohs(stcb->rport) ^ 4017 ntohs(stcb->sctp_ep->sctp_lport); 4018 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4019 if (netp) { 4020 *netp = net; 4021 } 4022 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4023 if (net->ro.ro_rt == NULL) { 4024 /* Since we have no route put it at the back */ 4025 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4026 } else if (netfirst == NULL) { 4027 /* We are the first one in the pool. */ 4028 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4029 } else if (netfirst->ro.ro_rt == NULL) { 4030 /* 4031 * First one has NO route. Place this one ahead of the first 4032 * one. 4033 */ 4034 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4035 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4036 /* 4037 * This one has a different interface than the one at the 4038 * top of the list. Place it ahead. 4039 */ 4040 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4041 } else { 4042 /* 4043 * Ok we have the same interface as the first one. Move 4044 * forward until we find either a) one with a NULL route... 4045 * insert ahead of that b) one with a different ifp.. insert 4046 * after that. c) end of the list.. insert at the tail. 4047 */ 4048 struct sctp_nets *netlook; 4049 4050 do { 4051 netlook = TAILQ_NEXT(netfirst, sctp_next); 4052 if (netlook == NULL) { 4053 /* End of the list */ 4054 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4055 break; 4056 } else if (netlook->ro.ro_rt == NULL) { 4057 /* next one has NO route */ 4058 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4059 break; 4060 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4061 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4062 net, sctp_next); 4063 break; 4064 } 4065 /* Shift forward */ 4066 netfirst = netlook; 4067 } while (netlook != NULL); 4068 } 4069 4070 /* got to have a primary set */ 4071 if (stcb->asoc.primary_destination == 0) { 4072 stcb->asoc.primary_destination = net; 4073 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4074 (net->ro.ro_rt) && 4075 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4076 /* No route to current primary adopt new primary */ 4077 stcb->asoc.primary_destination = net; 4078 } 4079 /* Validate primary is first */ 4080 net = TAILQ_FIRST(&stcb->asoc.nets); 4081 if ((net != stcb->asoc.primary_destination) && 4082 (stcb->asoc.primary_destination)) { 4083 /* 4084 * first one on the list is NOT the primary sctp_cmpaddr() 4085 * is much more efficient if the primary is the first on the 4086 * list, make it so. 4087 */ 4088 TAILQ_REMOVE(&stcb->asoc.nets, 4089 stcb->asoc.primary_destination, sctp_next); 4090 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4091 stcb->asoc.primary_destination, sctp_next); 4092 } 4093 return (0); 4094 } 4095 4096 4097 static uint32_t 4098 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4099 { 4100 uint32_t id; 4101 struct sctpasochead *head; 4102 struct sctp_tcb *lstcb; 4103 4104 SCTP_INP_WLOCK(inp); 4105 try_again: 4106 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4107 /* TSNH */ 4108 SCTP_INP_WUNLOCK(inp); 4109 return (0); 4110 } 4111 /* 4112 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4113 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4114 */ 4115 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4116 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4117 } 4118 id = inp->sctp_associd_counter; 4119 inp->sctp_associd_counter++; 4120 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4121 if (lstcb) { 4122 goto try_again; 4123 } 4124 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4125 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4126 stcb->asoc.in_asocid_hash = 1; 4127 SCTP_INP_WUNLOCK(inp); 4128 return id; 4129 } 4130 4131 /* 4132 * allocate an association and add it to the endpoint. The caller must be 4133 * careful to add all additional addresses once they are know right away or 4134 * else the assoc will be may experience a blackout scenario. 4135 */ 4136 struct sctp_tcb * 4137 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4138 int *error, uint32_t override_tag, uint32_t vrf_id, 4139 uint16_t o_streams, uint16_t port, 4140 struct thread *p 4141 ) 4142 { 4143 /* note the p argument is only valid in unbound sockets */ 4144 4145 struct sctp_tcb *stcb; 4146 struct sctp_association *asoc; 4147 struct sctpasochead *head; 4148 uint16_t rport; 4149 int err; 4150 4151 /* 4152 * Assumption made here: Caller has done a 4153 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4154 * address does not exist already. 4155 */ 4156 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4157 /* Hit max assoc, sorry no more */ 4158 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4159 *error = ENOBUFS; 4160 return (NULL); 4161 } 4162 if (firstaddr == NULL) { 4163 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4164 *error = EINVAL; 4165 return (NULL); 4166 } 4167 SCTP_INP_RLOCK(inp); 4168 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4169 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4170 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4171 /* 4172 * If its in the TCP pool, its NOT allowed to create an 4173 * association. The parent listener needs to call 4174 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4175 * off, or connected one does this.. its an error. 4176 */ 4177 SCTP_INP_RUNLOCK(inp); 4178 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4179 *error = EINVAL; 4180 return (NULL); 4181 } 4182 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4183 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4184 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4185 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4186 SCTP_INP_RUNLOCK(inp); 4187 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4188 *error = EINVAL; 4189 return (NULL); 4190 } 4191 } 4192 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4193 #ifdef SCTP_DEBUG 4194 if (firstaddr) { 4195 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4196 switch (firstaddr->sa_family) { 4197 #ifdef INET 4198 case AF_INET: 4199 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4200 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4201 break; 4202 #endif 4203 #ifdef INET6 4204 case AF_INET6: 4205 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4206 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4207 break; 4208 #endif 4209 default: 4210 break; 4211 } 4212 } else { 4213 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4214 } 4215 #endif /* SCTP_DEBUG */ 4216 switch (firstaddr->sa_family) { 4217 #ifdef INET 4218 case AF_INET: 4219 { 4220 struct sockaddr_in *sin; 4221 4222 sin = (struct sockaddr_in *)firstaddr; 4223 if ((ntohs(sin->sin_port) == 0) || 4224 (sin->sin_addr.s_addr == INADDR_ANY) || 4225 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4226 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4227 /* Invalid address */ 4228 SCTP_INP_RUNLOCK(inp); 4229 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4230 *error = EINVAL; 4231 return (NULL); 4232 } 4233 rport = sin->sin_port; 4234 break; 4235 } 4236 #endif 4237 #ifdef INET6 4238 case AF_INET6: 4239 { 4240 struct sockaddr_in6 *sin6; 4241 4242 sin6 = (struct sockaddr_in6 *)firstaddr; 4243 if ((ntohs(sin6->sin6_port) == 0) || 4244 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4245 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4246 /* Invalid address */ 4247 SCTP_INP_RUNLOCK(inp); 4248 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4249 *error = EINVAL; 4250 return (NULL); 4251 } 4252 rport = sin6->sin6_port; 4253 break; 4254 } 4255 #endif 4256 default: 4257 /* not supported family type */ 4258 SCTP_INP_RUNLOCK(inp); 4259 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4260 *error = EINVAL; 4261 return (NULL); 4262 } 4263 SCTP_INP_RUNLOCK(inp); 4264 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4265 /* 4266 * If you have not performed a bind, then we need to do the 4267 * ephemeral bind for you. 4268 */ 4269 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4270 (struct sockaddr *)NULL, 4271 (struct sctp_ifa *)NULL, 4272 p 4273 ))) { 4274 /* bind error, probably perm */ 4275 *error = err; 4276 return (NULL); 4277 } 4278 } 4279 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4280 if (stcb == NULL) { 4281 /* out of memory? */ 4282 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4283 *error = ENOMEM; 4284 return (NULL); 4285 } 4286 SCTP_INCR_ASOC_COUNT(); 4287 4288 bzero(stcb, sizeof(*stcb)); 4289 asoc = &stcb->asoc; 4290 4291 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4292 SCTP_TCB_LOCK_INIT(stcb); 4293 SCTP_TCB_SEND_LOCK_INIT(stcb); 4294 stcb->rport = rport; 4295 /* setup back pointer's */ 4296 stcb->sctp_ep = inp; 4297 stcb->sctp_socket = inp->sctp_socket; 4298 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4299 /* failed */ 4300 SCTP_TCB_LOCK_DESTROY(stcb); 4301 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4302 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4303 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4304 SCTP_DECR_ASOC_COUNT(); 4305 *error = err; 4306 return (NULL); 4307 } 4308 /* and the port */ 4309 SCTP_INP_INFO_WLOCK(); 4310 SCTP_INP_WLOCK(inp); 4311 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4312 /* inpcb freed while alloc going on */ 4313 SCTP_TCB_LOCK_DESTROY(stcb); 4314 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4315 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4316 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4317 SCTP_INP_WUNLOCK(inp); 4318 SCTP_INP_INFO_WUNLOCK(); 4319 SCTP_DECR_ASOC_COUNT(); 4320 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4321 *error = EINVAL; 4322 return (NULL); 4323 } 4324 SCTP_TCB_LOCK(stcb); 4325 4326 /* now that my_vtag is set, add it to the hash */ 4327 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4328 /* put it in the bucket in the vtag hash of assoc's for the system */ 4329 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4330 SCTP_INP_INFO_WUNLOCK(); 4331 4332 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4333 /* failure.. memory error? */ 4334 if (asoc->strmout) { 4335 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4336 asoc->strmout = NULL; 4337 } 4338 if (asoc->mapping_array) { 4339 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4340 asoc->mapping_array = NULL; 4341 } 4342 if (asoc->nr_mapping_array) { 4343 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4344 asoc->nr_mapping_array = NULL; 4345 } 4346 SCTP_DECR_ASOC_COUNT(); 4347 SCTP_TCB_UNLOCK(stcb); 4348 SCTP_TCB_LOCK_DESTROY(stcb); 4349 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4350 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4351 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4352 SCTP_INP_WUNLOCK(inp); 4353 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4354 *error = ENOBUFS; 4355 return (NULL); 4356 } 4357 /* Init all the timers */ 4358 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4359 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4360 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4361 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4362 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4363 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4364 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4365 4366 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4367 /* now file the port under the hash as well */ 4368 if (inp->sctp_tcbhash != NULL) { 4369 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4370 inp->sctp_hashmark)]; 4371 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4372 } 4373 SCTP_INP_WUNLOCK(inp); 4374 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4375 return (stcb); 4376 } 4377 4378 4379 void 4380 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4381 { 4382 struct sctp_association *asoc; 4383 4384 asoc = &stcb->asoc; 4385 asoc->numnets--; 4386 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4387 if (net == asoc->primary_destination) { 4388 /* Reset primary */ 4389 struct sctp_nets *lnet; 4390 4391 lnet = TAILQ_FIRST(&asoc->nets); 4392 /* 4393 * Mobility adaptation Ideally, if deleted destination is 4394 * the primary, it becomes a fast retransmission trigger by 4395 * the subsequent SET PRIMARY. (by micchie) 4396 */ 4397 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4398 SCTP_MOBILITY_BASE) || 4399 sctp_is_mobility_feature_on(stcb->sctp_ep, 4400 SCTP_MOBILITY_FASTHANDOFF)) { 4401 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4402 if (asoc->deleted_primary != NULL) { 4403 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4404 goto out; 4405 } 4406 asoc->deleted_primary = net; 4407 atomic_add_int(&net->ref_count, 1); 4408 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4409 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4410 sctp_mobility_feature_on(stcb->sctp_ep, 4411 SCTP_MOBILITY_PRIM_DELETED); 4412 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4413 stcb->sctp_ep, stcb, NULL); 4414 } 4415 out: 4416 /* Try to find a confirmed primary */ 4417 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4418 } 4419 if (net == asoc->last_data_chunk_from) { 4420 /* Reset primary */ 4421 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4422 } 4423 if (net == asoc->last_control_chunk_from) { 4424 /* Clear net */ 4425 asoc->last_control_chunk_from = NULL; 4426 } 4427 if (net == stcb->asoc.alternate) { 4428 sctp_free_remote_addr(stcb->asoc.alternate); 4429 stcb->asoc.alternate = NULL; 4430 } 4431 sctp_free_remote_addr(net); 4432 } 4433 4434 /* 4435 * remove a remote endpoint address from an association, it will fail if the 4436 * address does not exist. 4437 */ 4438 int 4439 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4440 { 4441 /* 4442 * Here we need to remove a remote address. This is quite simple, we 4443 * first find it in the list of address for the association 4444 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4445 * on that item. Note we do not allow it to be removed if there are 4446 * no other addresses. 4447 */ 4448 struct sctp_association *asoc; 4449 struct sctp_nets *net, *nnet; 4450 4451 asoc = &stcb->asoc; 4452 4453 /* locate the address */ 4454 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4455 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4456 continue; 4457 } 4458 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4459 remaddr)) { 4460 /* we found the guy */ 4461 if (asoc->numnets < 2) { 4462 /* Must have at LEAST two remote addresses */ 4463 return (-1); 4464 } else { 4465 sctp_remove_net(stcb, net); 4466 return (0); 4467 } 4468 } 4469 } 4470 /* not found. */ 4471 return (-2); 4472 } 4473 4474 void 4475 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4476 { 4477 struct sctpvtaghead *chain; 4478 struct sctp_tagblock *twait_block; 4479 int found = 0; 4480 int i; 4481 4482 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4483 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4484 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4485 if ((twait_block->vtag_block[i].v_tag == tag) && 4486 (twait_block->vtag_block[i].lport == lport) && 4487 (twait_block->vtag_block[i].rport == rport)) { 4488 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4489 twait_block->vtag_block[i].v_tag = 0; 4490 twait_block->vtag_block[i].lport = 0; 4491 twait_block->vtag_block[i].rport = 0; 4492 found = 1; 4493 break; 4494 } 4495 } 4496 if (found) 4497 break; 4498 } 4499 } 4500 4501 int 4502 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4503 { 4504 struct sctpvtaghead *chain; 4505 struct sctp_tagblock *twait_block; 4506 int found = 0; 4507 int i; 4508 4509 SCTP_INP_INFO_WLOCK(); 4510 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4511 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4512 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4513 if ((twait_block->vtag_block[i].v_tag == tag) && 4514 (twait_block->vtag_block[i].lport == lport) && 4515 (twait_block->vtag_block[i].rport == rport)) { 4516 found = 1; 4517 break; 4518 } 4519 } 4520 if (found) 4521 break; 4522 } 4523 SCTP_INP_INFO_WUNLOCK(); 4524 return (found); 4525 } 4526 4527 4528 void 4529 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4530 { 4531 struct sctpvtaghead *chain; 4532 struct sctp_tagblock *twait_block; 4533 struct timeval now; 4534 int set, i; 4535 4536 if (time == 0) { 4537 /* Its disabled */ 4538 return; 4539 } 4540 (void)SCTP_GETTIME_TIMEVAL(&now); 4541 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4542 set = 0; 4543 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4544 /* Block(s) present, lets find space, and expire on the fly */ 4545 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4546 if ((twait_block->vtag_block[i].v_tag == 0) && 4547 !set) { 4548 twait_block->vtag_block[i].tv_sec_at_expire = 4549 now.tv_sec + time; 4550 twait_block->vtag_block[i].v_tag = tag; 4551 twait_block->vtag_block[i].lport = lport; 4552 twait_block->vtag_block[i].rport = rport; 4553 set = 1; 4554 } else if ((twait_block->vtag_block[i].v_tag) && 4555 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4556 /* Audit expires this guy */ 4557 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4558 twait_block->vtag_block[i].v_tag = 0; 4559 twait_block->vtag_block[i].lport = 0; 4560 twait_block->vtag_block[i].rport = 0; 4561 if (set == 0) { 4562 /* Reuse it for my new tag */ 4563 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4564 twait_block->vtag_block[i].v_tag = tag; 4565 twait_block->vtag_block[i].lport = lport; 4566 twait_block->vtag_block[i].rport = rport; 4567 set = 1; 4568 } 4569 } 4570 } 4571 if (set) { 4572 /* 4573 * We only do up to the block where we can place our 4574 * tag for audits 4575 */ 4576 break; 4577 } 4578 } 4579 /* Need to add a new block to chain */ 4580 if (!set) { 4581 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4582 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4583 if (twait_block == NULL) { 4584 #ifdef INVARIANTS 4585 panic("Can not alloc tagblock"); 4586 #endif 4587 return; 4588 } 4589 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4590 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4591 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4592 twait_block->vtag_block[0].v_tag = tag; 4593 twait_block->vtag_block[0].lport = lport; 4594 twait_block->vtag_block[0].rport = rport; 4595 } 4596 } 4597 4598 void 4599 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4600 { 4601 struct sctp_tmit_chunk *chk, *nchk; 4602 struct sctp_queued_to_read *ctl, *nctl; 4603 4604 TAILQ_FOREACH_SAFE(ctl, rh, next_instrm, nctl) { 4605 TAILQ_REMOVE(rh, ctl, next_instrm); 4606 ctl->on_strm_q = 0; 4607 if (ctl->on_read_q == 0) { 4608 sctp_free_remote_addr(ctl->whoFrom); 4609 if (ctl->data) { 4610 sctp_m_freem(ctl->data); 4611 ctl->data = NULL; 4612 } 4613 } 4614 /* Reassembly free? */ 4615 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 4616 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 4617 if (chk->data) { 4618 sctp_m_freem(chk->data); 4619 chk->data = NULL; 4620 } 4621 if (chk->holds_key_ref) 4622 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4623 sctp_free_remote_addr(chk->whoTo); 4624 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4625 SCTP_DECR_CHK_COUNT(); 4626 /* sa_ignore FREED_MEMORY */ 4627 } 4628 /* 4629 * We don't free the address here since all the net's were 4630 * freed above. 4631 */ 4632 if (ctl->on_read_q == 0) { 4633 sctp_free_a_readq(stcb, ctl); 4634 } 4635 } 4636 } 4637 4638 4639 /*- 4640 * Free the association after un-hashing the remote port. This 4641 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4642 * expect that the input to this function IS a locked TCB. 4643 * It will return 0, if it did NOT destroy the association (instead 4644 * it unlocks it. It will return NON-zero if it either destroyed the 4645 * association OR the association is already destroyed. 4646 */ 4647 int 4648 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4649 { 4650 int i; 4651 struct sctp_association *asoc; 4652 struct sctp_nets *net, *nnet; 4653 struct sctp_laddr *laddr, *naddr; 4654 struct sctp_tmit_chunk *chk, *nchk; 4655 struct sctp_asconf_addr *aparam, *naparam; 4656 struct sctp_asconf_ack *aack, *naack; 4657 struct sctp_stream_reset_list *strrst, *nstrrst; 4658 struct sctp_queued_to_read *sq, *nsq; 4659 struct sctp_stream_queue_pending *sp, *nsp; 4660 sctp_sharedkey_t *shared_key, *nshared_key; 4661 struct socket *so; 4662 4663 /* first, lets purge the entry from the hash table. */ 4664 4665 #ifdef SCTP_LOG_CLOSING 4666 sctp_log_closing(inp, stcb, 6); 4667 #endif 4668 if (stcb->asoc.state == 0) { 4669 #ifdef SCTP_LOG_CLOSING 4670 sctp_log_closing(inp, NULL, 7); 4671 #endif 4672 /* there is no asoc, really TSNH :-0 */ 4673 return (1); 4674 } 4675 if (stcb->asoc.alternate) { 4676 sctp_free_remote_addr(stcb->asoc.alternate); 4677 stcb->asoc.alternate = NULL; 4678 } 4679 /* TEMP CODE */ 4680 if (stcb->freed_from_where == 0) { 4681 /* Only record the first place free happened from */ 4682 stcb->freed_from_where = from_location; 4683 } 4684 /* TEMP CODE */ 4685 4686 asoc = &stcb->asoc; 4687 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4688 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4689 /* nothing around */ 4690 so = NULL; 4691 else 4692 so = inp->sctp_socket; 4693 4694 /* 4695 * We used timer based freeing if a reader or writer is in the way. 4696 * So we first check if we are actually being called from a timer, 4697 * if so we abort early if a reader or writer is still in the way. 4698 */ 4699 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4700 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4701 /* 4702 * is it the timer driving us? if so are the reader/writers 4703 * gone? 4704 */ 4705 if (stcb->asoc.refcnt) { 4706 /* nope, reader or writer in the way */ 4707 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4708 /* no asoc destroyed */ 4709 SCTP_TCB_UNLOCK(stcb); 4710 #ifdef SCTP_LOG_CLOSING 4711 sctp_log_closing(inp, stcb, 8); 4712 #endif 4713 return (0); 4714 } 4715 } 4716 /* now clean up any other timers */ 4717 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4718 asoc->dack_timer.self = NULL; 4719 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4720 /*- 4721 * For stream reset we don't blast this unless 4722 * it is a str-reset timer, it might be the 4723 * free-asoc timer which we DON'T want to 4724 * disturb. 4725 */ 4726 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4727 asoc->strreset_timer.self = NULL; 4728 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4729 asoc->asconf_timer.self = NULL; 4730 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4731 asoc->autoclose_timer.self = NULL; 4732 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4733 asoc->shut_guard_timer.self = NULL; 4734 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4735 asoc->delayed_event_timer.self = NULL; 4736 /* Mobility adaptation */ 4737 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4738 asoc->delete_prim_timer.self = NULL; 4739 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4740 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4741 net->rxt_timer.self = NULL; 4742 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4743 net->pmtu_timer.self = NULL; 4744 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4745 net->hb_timer.self = NULL; 4746 } 4747 /* Now the read queue needs to be cleaned up (only once) */ 4748 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4749 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4750 SCTP_INP_READ_LOCK(inp); 4751 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4752 if (sq->stcb == stcb) { 4753 sq->do_not_ref_stcb = 1; 4754 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4755 /* 4756 * If there is no end, there never will be 4757 * now. 4758 */ 4759 if (sq->end_added == 0) { 4760 /* Held for PD-API clear that. */ 4761 sq->pdapi_aborted = 1; 4762 sq->held_length = 0; 4763 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4764 /* 4765 * Need to add a PD-API 4766 * aborted indication. 4767 * Setting the control_pdapi 4768 * assures that it will be 4769 * added right after this 4770 * msg. 4771 */ 4772 uint32_t strseq; 4773 4774 stcb->asoc.control_pdapi = sq; 4775 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4776 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4777 stcb, 4778 SCTP_PARTIAL_DELIVERY_ABORTED, 4779 (void *)&strseq, 4780 SCTP_SO_LOCKED); 4781 stcb->asoc.control_pdapi = NULL; 4782 } 4783 } 4784 /* Add an end to wake them */ 4785 sq->end_added = 1; 4786 } 4787 } 4788 SCTP_INP_READ_UNLOCK(inp); 4789 if (stcb->block_entry) { 4790 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4791 stcb->block_entry->error = ECONNRESET; 4792 stcb->block_entry = NULL; 4793 } 4794 } 4795 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4796 /* 4797 * Someone holds a reference OR the socket is unaccepted 4798 * yet. 4799 */ 4800 if ((stcb->asoc.refcnt) || 4801 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4802 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4803 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4804 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4805 } 4806 SCTP_TCB_UNLOCK(stcb); 4807 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4808 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4809 /* nothing around */ 4810 so = NULL; 4811 if (so) { 4812 /* Wake any reader/writers */ 4813 sctp_sorwakeup(inp, so); 4814 sctp_sowwakeup(inp, so); 4815 } 4816 #ifdef SCTP_LOG_CLOSING 4817 sctp_log_closing(inp, stcb, 9); 4818 #endif 4819 /* no asoc destroyed */ 4820 return (0); 4821 } 4822 #ifdef SCTP_LOG_CLOSING 4823 sctp_log_closing(inp, stcb, 10); 4824 #endif 4825 /* 4826 * When I reach here, no others want to kill the assoc yet.. and I 4827 * own the lock. Now its possible an abort comes in when I do the 4828 * lock exchange below to grab all the locks to do the final take 4829 * out. to prevent this we increment the count, which will start a 4830 * timer and blow out above thus assuring us that we hold exclusive 4831 * killing of the asoc. Note that after getting back the TCB lock we 4832 * will go ahead and increment the counter back up and stop any 4833 * timer a passing stranger may have started :-S 4834 */ 4835 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4836 atomic_add_int(&stcb->asoc.refcnt, 1); 4837 4838 SCTP_TCB_UNLOCK(stcb); 4839 SCTP_INP_INFO_WLOCK(); 4840 SCTP_INP_WLOCK(inp); 4841 SCTP_TCB_LOCK(stcb); 4842 } 4843 /* Double check the GONE flag */ 4844 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4845 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4846 /* nothing around */ 4847 so = NULL; 4848 4849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4850 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4851 /* 4852 * For TCP type we need special handling when we are 4853 * connected. We also include the peel'ed off ones to. 4854 */ 4855 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4856 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4857 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4858 if (so) { 4859 SOCK_LOCK(so); 4860 if (so->so_rcv.sb_cc == 0) { 4861 so->so_state &= ~(SS_ISCONNECTING | 4862 SS_ISDISCONNECTING | 4863 SS_ISCONFIRMING | 4864 SS_ISCONNECTED); 4865 } 4866 socantrcvmore_locked(so); 4867 socantsendmore(so); 4868 sctp_sowwakeup(inp, so); 4869 sctp_sorwakeup(inp, so); 4870 SCTP_SOWAKEUP(so); 4871 } 4872 } 4873 } 4874 /* 4875 * Make it invalid too, that way if its about to run it will abort 4876 * and return. 4877 */ 4878 /* re-increment the lock */ 4879 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4880 atomic_add_int(&stcb->asoc.refcnt, -1); 4881 } 4882 if (stcb->asoc.refcnt) { 4883 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4884 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4885 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4886 SCTP_INP_INFO_WUNLOCK(); 4887 SCTP_INP_WUNLOCK(inp); 4888 } 4889 SCTP_TCB_UNLOCK(stcb); 4890 return (0); 4891 } 4892 asoc->state = 0; 4893 if (inp->sctp_tcbhash) { 4894 LIST_REMOVE(stcb, sctp_tcbhash); 4895 } 4896 if (stcb->asoc.in_asocid_hash) { 4897 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4898 } 4899 /* Now lets remove it from the list of ALL associations in the EP */ 4900 LIST_REMOVE(stcb, sctp_tcblist); 4901 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4902 SCTP_INP_INCR_REF(inp); 4903 SCTP_INP_WUNLOCK(inp); 4904 } 4905 /* pull from vtag hash */ 4906 LIST_REMOVE(stcb, sctp_asocs); 4907 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4908 inp->sctp_lport, stcb->rport); 4909 4910 /* 4911 * Now restop the timers to be sure this is paranoia at is finest! 4912 */ 4913 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4914 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4915 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4916 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4917 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4918 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4919 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4920 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4921 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4922 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4923 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4924 } 4925 4926 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4927 /* 4928 * The chunk lists and such SHOULD be empty but we check them just 4929 * in case. 4930 */ 4931 /* anything on the wheel needs to be removed */ 4932 for (i = 0; i < asoc->streamoutcnt; i++) { 4933 struct sctp_stream_out *outs; 4934 4935 outs = &asoc->strmout[i]; 4936 /* now clean up any chunks here */ 4937 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4938 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4939 TAILQ_REMOVE(&outs->outqueue, sp, next); 4940 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0); 4941 sctp_free_spbufspace(stcb, asoc, sp); 4942 if (sp->data) { 4943 if (so) { 4944 /* Still an open socket - report */ 4945 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4946 0, (void *)sp, SCTP_SO_LOCKED); 4947 } 4948 if (sp->data) { 4949 sctp_m_freem(sp->data); 4950 sp->data = NULL; 4951 sp->tail_mbuf = NULL; 4952 sp->length = 0; 4953 } 4954 } 4955 if (sp->net) { 4956 sctp_free_remote_addr(sp->net); 4957 sp->net = NULL; 4958 } 4959 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4960 } 4961 } 4962 /* sa_ignore FREED_MEMORY */ 4963 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4964 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4965 SCTP_FREE(strrst, SCTP_M_STRESET); 4966 } 4967 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4968 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4969 if (sq->data) { 4970 sctp_m_freem(sq->data); 4971 sq->data = NULL; 4972 } 4973 sctp_free_remote_addr(sq->whoFrom); 4974 sq->whoFrom = NULL; 4975 sq->stcb = NULL; 4976 /* Free the ctl entry */ 4977 sctp_free_a_readq(stcb, sq); 4978 /* sa_ignore FREED_MEMORY */ 4979 } 4980 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4981 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4982 if (chk->data) { 4983 sctp_m_freem(chk->data); 4984 chk->data = NULL; 4985 } 4986 if (chk->holds_key_ref) 4987 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4988 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4989 SCTP_DECR_CHK_COUNT(); 4990 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4991 asoc->free_chunk_cnt--; 4992 /* sa_ignore FREED_MEMORY */ 4993 } 4994 /* pending send queue SHOULD be empty */ 4995 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4996 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 4997 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 4998 #ifdef INVARIANTS 4999 } else { 5000 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5001 #endif 5002 } 5003 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5004 if (chk->data) { 5005 if (so) { 5006 /* Still a socket? */ 5007 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5008 0, chk, SCTP_SO_LOCKED); 5009 } 5010 if (chk->data) { 5011 sctp_m_freem(chk->data); 5012 chk->data = NULL; 5013 } 5014 } 5015 if (chk->holds_key_ref) 5016 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5017 if (chk->whoTo) { 5018 sctp_free_remote_addr(chk->whoTo); 5019 chk->whoTo = NULL; 5020 } 5021 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5022 SCTP_DECR_CHK_COUNT(); 5023 /* sa_ignore FREED_MEMORY */ 5024 } 5025 /* sent queue SHOULD be empty */ 5026 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5027 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5028 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5029 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5030 #ifdef INVARIANTS 5031 } else { 5032 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5033 #endif 5034 } 5035 } 5036 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5037 if (chk->data) { 5038 if (so) { 5039 /* Still a socket? */ 5040 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5041 0, chk, SCTP_SO_LOCKED); 5042 } 5043 if (chk->data) { 5044 sctp_m_freem(chk->data); 5045 chk->data = NULL; 5046 } 5047 } 5048 if (chk->holds_key_ref) 5049 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5050 sctp_free_remote_addr(chk->whoTo); 5051 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5052 SCTP_DECR_CHK_COUNT(); 5053 /* sa_ignore FREED_MEMORY */ 5054 } 5055 #ifdef INVARIANTS 5056 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5057 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5058 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5059 } 5060 } 5061 #endif 5062 /* control queue MAY not be empty */ 5063 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5064 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5065 if (chk->data) { 5066 sctp_m_freem(chk->data); 5067 chk->data = NULL; 5068 } 5069 if (chk->holds_key_ref) 5070 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5071 sctp_free_remote_addr(chk->whoTo); 5072 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5073 SCTP_DECR_CHK_COUNT(); 5074 /* sa_ignore FREED_MEMORY */ 5075 } 5076 /* ASCONF queue MAY not be empty */ 5077 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5078 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5079 if (chk->data) { 5080 sctp_m_freem(chk->data); 5081 chk->data = NULL; 5082 } 5083 if (chk->holds_key_ref) 5084 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5085 sctp_free_remote_addr(chk->whoTo); 5086 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5087 SCTP_DECR_CHK_COUNT(); 5088 /* sa_ignore FREED_MEMORY */ 5089 } 5090 if (asoc->mapping_array) { 5091 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5092 asoc->mapping_array = NULL; 5093 } 5094 if (asoc->nr_mapping_array) { 5095 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5096 asoc->nr_mapping_array = NULL; 5097 } 5098 /* the stream outs */ 5099 if (asoc->strmout) { 5100 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5101 asoc->strmout = NULL; 5102 } 5103 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5104 if (asoc->strmin) { 5105 for (i = 0; i < asoc->streamincnt; i++) { 5106 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5107 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5108 } 5109 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5110 asoc->strmin = NULL; 5111 } 5112 asoc->streamincnt = 0; 5113 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5114 #ifdef INVARIANTS 5115 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5116 panic("no net's left alloc'ed, or list points to itself"); 5117 } 5118 #endif 5119 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5120 sctp_free_remote_addr(net); 5121 } 5122 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5123 /* sa_ignore FREED_MEMORY */ 5124 sctp_remove_laddr(laddr); 5125 } 5126 5127 /* pending asconf (address) parameters */ 5128 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5129 /* sa_ignore FREED_MEMORY */ 5130 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5131 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5132 } 5133 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5134 /* sa_ignore FREED_MEMORY */ 5135 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5136 if (aack->data != NULL) { 5137 sctp_m_freem(aack->data); 5138 } 5139 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5140 } 5141 /* clean up auth stuff */ 5142 if (asoc->local_hmacs) 5143 sctp_free_hmaclist(asoc->local_hmacs); 5144 if (asoc->peer_hmacs) 5145 sctp_free_hmaclist(asoc->peer_hmacs); 5146 5147 if (asoc->local_auth_chunks) 5148 sctp_free_chunklist(asoc->local_auth_chunks); 5149 if (asoc->peer_auth_chunks) 5150 sctp_free_chunklist(asoc->peer_auth_chunks); 5151 5152 sctp_free_authinfo(&asoc->authinfo); 5153 5154 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5155 LIST_REMOVE(shared_key, next); 5156 sctp_free_sharedkey(shared_key); 5157 /* sa_ignore FREED_MEMORY */ 5158 } 5159 5160 /* Insert new items here :> */ 5161 5162 /* Get rid of LOCK */ 5163 SCTP_TCB_UNLOCK(stcb); 5164 SCTP_TCB_LOCK_DESTROY(stcb); 5165 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5166 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5167 SCTP_INP_INFO_WUNLOCK(); 5168 SCTP_INP_RLOCK(inp); 5169 } 5170 #ifdef SCTP_TRACK_FREED_ASOCS 5171 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5172 /* now clean up the tasoc itself */ 5173 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5174 SCTP_DECR_ASOC_COUNT(); 5175 } else { 5176 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5177 } 5178 #else 5179 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5180 SCTP_DECR_ASOC_COUNT(); 5181 #endif 5182 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5183 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5184 /* 5185 * If its NOT the inp_free calling us AND sctp_close 5186 * as been called, we call back... 5187 */ 5188 SCTP_INP_RUNLOCK(inp); 5189 /* 5190 * This will start the kill timer (if we are the 5191 * last one) since we hold an increment yet. But 5192 * this is the only safe way to do this since 5193 * otherwise if the socket closes at the same time 5194 * we are here we might collide in the cleanup. 5195 */ 5196 sctp_inpcb_free(inp, 5197 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5198 SCTP_CALLED_DIRECTLY_NOCMPSET); 5199 SCTP_INP_DECR_REF(inp); 5200 goto out_of; 5201 } else { 5202 /* The socket is still open. */ 5203 SCTP_INP_DECR_REF(inp); 5204 } 5205 } 5206 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5207 SCTP_INP_RUNLOCK(inp); 5208 } 5209 out_of: 5210 /* destroyed the asoc */ 5211 #ifdef SCTP_LOG_CLOSING 5212 sctp_log_closing(inp, NULL, 11); 5213 #endif 5214 return (1); 5215 } 5216 5217 5218 5219 /* 5220 * determine if a destination is "reachable" based upon the addresses bound 5221 * to the current endpoint (e.g. only v4 or v6 currently bound) 5222 */ 5223 /* 5224 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5225 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5226 * types bound as its endpoint 5227 */ 5228 int 5229 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5230 { 5231 struct sctp_inpcb *inp; 5232 int answer; 5233 5234 /* 5235 * No locks here, the TCB, in all cases is already locked and an 5236 * assoc is up. There is either a INP lock by the caller applied (in 5237 * asconf case when deleting an address) or NOT in the HB case, 5238 * however if HB then the INP increment is up and the INP will not 5239 * be removed (on top of the fact that we have a TCB lock). So we 5240 * only want to read the sctp_flags, which is either bound-all or 5241 * not.. no protection needed since once an assoc is up you can't be 5242 * changing your binding. 5243 */ 5244 inp = stcb->sctp_ep; 5245 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5246 /* if bound all, destination is not restricted */ 5247 /* 5248 * RRS: Question during lock work: Is this correct? If you 5249 * are bound-all you still might need to obey the V4--V6 5250 * flags??? IMO this bound-all stuff needs to be removed! 5251 */ 5252 return (1); 5253 } 5254 /* NOTE: all "scope" checks are done when local addresses are added */ 5255 switch (destaddr->sa_family) { 5256 #ifdef INET6 5257 case AF_INET6: 5258 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5259 break; 5260 #endif 5261 #ifdef INET 5262 case AF_INET: 5263 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5264 break; 5265 #endif 5266 default: 5267 /* invalid family, so it's unreachable */ 5268 answer = 0; 5269 break; 5270 } 5271 return (answer); 5272 } 5273 5274 /* 5275 * update the inp_vflags on an endpoint 5276 */ 5277 static void 5278 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5279 { 5280 struct sctp_laddr *laddr; 5281 5282 /* first clear the flag */ 5283 inp->ip_inp.inp.inp_vflag = 0; 5284 /* set the flag based on addresses on the ep list */ 5285 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5286 if (laddr->ifa == NULL) { 5287 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5288 __func__); 5289 continue; 5290 } 5291 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5292 continue; 5293 } 5294 switch (laddr->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 } 5310 5311 /* 5312 * Add the address to the endpoint local address list There is nothing to be 5313 * done if we are bound to all addresses 5314 */ 5315 void 5316 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5317 { 5318 struct sctp_laddr *laddr; 5319 struct sctp_tcb *stcb; 5320 int fnd, error = 0; 5321 5322 fnd = 0; 5323 5324 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5325 /* You are already bound to all. You have it already */ 5326 return; 5327 } 5328 #ifdef INET6 5329 if (ifa->address.sa.sa_family == AF_INET6) { 5330 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5331 /* Can't bind a non-useable addr. */ 5332 return; 5333 } 5334 } 5335 #endif 5336 /* first, is it already present? */ 5337 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5338 if (laddr->ifa == ifa) { 5339 fnd = 1; 5340 break; 5341 } 5342 } 5343 5344 if (fnd == 0) { 5345 /* Not in the ep list */ 5346 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5347 if (error != 0) 5348 return; 5349 inp->laddr_count++; 5350 /* update inp_vflag flags */ 5351 switch (ifa->address.sa.sa_family) { 5352 #ifdef INET6 5353 case AF_INET6: 5354 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5355 break; 5356 #endif 5357 #ifdef INET 5358 case AF_INET: 5359 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5360 break; 5361 #endif 5362 default: 5363 break; 5364 } 5365 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5366 sctp_add_local_addr_restricted(stcb, ifa); 5367 } 5368 } 5369 return; 5370 } 5371 5372 5373 /* 5374 * select a new (hopefully reachable) destination net (should only be used 5375 * when we deleted an ep addr that is the only usable source address to reach 5376 * the destination net) 5377 */ 5378 static void 5379 sctp_select_primary_destination(struct sctp_tcb *stcb) 5380 { 5381 struct sctp_nets *net; 5382 5383 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5384 /* for now, we'll just pick the first reachable one we find */ 5385 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5386 continue; 5387 if (sctp_destination_is_reachable(stcb, 5388 (struct sockaddr *)&net->ro._l_addr)) { 5389 /* found a reachable destination */ 5390 stcb->asoc.primary_destination = net; 5391 } 5392 } 5393 /* I can't there from here! ...we're gonna die shortly... */ 5394 } 5395 5396 5397 /* 5398 * Delete the address from the endpoint local address list. There is nothing 5399 * to be done if we are bound to all addresses 5400 */ 5401 void 5402 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5403 { 5404 struct sctp_laddr *laddr; 5405 int fnd; 5406 5407 fnd = 0; 5408 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5409 /* You are already bound to all. You have it already */ 5410 return; 5411 } 5412 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5413 if (laddr->ifa == ifa) { 5414 fnd = 1; 5415 break; 5416 } 5417 } 5418 if (fnd && (inp->laddr_count < 2)) { 5419 /* can't delete unless there are at LEAST 2 addresses */ 5420 return; 5421 } 5422 if (fnd) { 5423 /* 5424 * clean up any use of this address go through our 5425 * associations and clear any last_used_address that match 5426 * this one for each assoc, see if a new primary_destination 5427 * is needed 5428 */ 5429 struct sctp_tcb *stcb; 5430 5431 /* clean up "next_addr_touse" */ 5432 if (inp->next_addr_touse == laddr) 5433 /* delete this address */ 5434 inp->next_addr_touse = NULL; 5435 5436 /* clean up "last_used_address" */ 5437 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5438 struct sctp_nets *net; 5439 5440 SCTP_TCB_LOCK(stcb); 5441 if (stcb->asoc.last_used_address == laddr) 5442 /* delete this address */ 5443 stcb->asoc.last_used_address = NULL; 5444 /* 5445 * Now spin through all the nets and purge any ref 5446 * to laddr 5447 */ 5448 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5449 if (net->ro._s_addr == laddr->ifa) { 5450 /* Yep, purge src address selected */ 5451 sctp_rtentry_t *rt; 5452 5453 /* delete this address if cached */ 5454 rt = net->ro.ro_rt; 5455 if (rt != NULL) { 5456 RTFREE(rt); 5457 net->ro.ro_rt = NULL; 5458 } 5459 sctp_free_ifa(net->ro._s_addr); 5460 net->ro._s_addr = NULL; 5461 net->src_addr_selected = 0; 5462 } 5463 } 5464 SCTP_TCB_UNLOCK(stcb); 5465 } /* for each tcb */ 5466 /* remove it from the ep list */ 5467 sctp_remove_laddr(laddr); 5468 inp->laddr_count--; 5469 /* update inp_vflag flags */ 5470 sctp_update_ep_vflag(inp); 5471 } 5472 return; 5473 } 5474 5475 /* 5476 * Add the address to the TCB local address restricted list. 5477 * This is a "pending" address list (eg. addresses waiting for an 5478 * ASCONF-ACK response) and cannot be used as a valid source address. 5479 */ 5480 void 5481 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5482 { 5483 struct sctp_laddr *laddr; 5484 struct sctpladdr *list; 5485 5486 /* 5487 * Assumes TCB is locked.. and possibly the INP. May need to 5488 * confirm/fix that if we need it and is not the case. 5489 */ 5490 list = &stcb->asoc.sctp_restricted_addrs; 5491 5492 #ifdef INET6 5493 if (ifa->address.sa.sa_family == AF_INET6) { 5494 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5495 /* Can't bind a non-existent addr. */ 5496 return; 5497 } 5498 } 5499 #endif 5500 /* does the address already exist? */ 5501 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5502 if (laddr->ifa == ifa) { 5503 return; 5504 } 5505 } 5506 5507 /* add to the list */ 5508 (void)sctp_insert_laddr(list, ifa, 0); 5509 return; 5510 } 5511 5512 /* 5513 * Remove a local address from the TCB local address restricted list 5514 */ 5515 void 5516 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5517 { 5518 struct sctp_inpcb *inp; 5519 struct sctp_laddr *laddr; 5520 5521 /* 5522 * This is called by asconf work. It is assumed that a) The TCB is 5523 * locked and b) The INP is locked. This is true in as much as I can 5524 * trace through the entry asconf code where I did these locks. 5525 * Again, the ASCONF code is a bit different in that it does lock 5526 * the INP during its work often times. This must be since we don't 5527 * want other proc's looking up things while what they are looking 5528 * up is changing :-D 5529 */ 5530 5531 inp = stcb->sctp_ep; 5532 /* if subset bound and don't allow ASCONF's, can't delete last */ 5533 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5534 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5535 if (stcb->sctp_ep->laddr_count < 2) { 5536 /* can't delete last address */ 5537 return; 5538 } 5539 } 5540 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5541 /* remove the address if it exists */ 5542 if (laddr->ifa == NULL) 5543 continue; 5544 if (laddr->ifa == ifa) { 5545 sctp_remove_laddr(laddr); 5546 return; 5547 } 5548 } 5549 5550 /* address not found! */ 5551 return; 5552 } 5553 5554 /* 5555 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5556 */ 5557 /* sysctl */ 5558 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5559 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5560 5561 5562 5563 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5564 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5565 int *sctp_cpuarry = NULL; 5566 void 5567 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5568 { 5569 /* Queue a packet to a processor for the specified core */ 5570 struct sctp_mcore_queue *qent; 5571 struct sctp_mcore_ctrl *wkq; 5572 int need_wake = 0; 5573 5574 if (sctp_mcore_workers == NULL) { 5575 /* Something went way bad during setup */ 5576 sctp_input_with_port(m, off, 0); 5577 return; 5578 } 5579 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5580 (sizeof(struct sctp_mcore_queue)), 5581 SCTP_M_MCORE); 5582 if (qent == NULL) { 5583 /* This is trouble */ 5584 sctp_input_with_port(m, off, 0); 5585 return; 5586 } 5587 qent->vn = curvnet; 5588 qent->m = m; 5589 qent->off = off; 5590 qent->v6 = 0; 5591 wkq = &sctp_mcore_workers[cpu_to_use]; 5592 SCTP_MCORE_QLOCK(wkq); 5593 5594 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5595 if (wkq->running == 0) { 5596 need_wake = 1; 5597 } 5598 SCTP_MCORE_QUNLOCK(wkq); 5599 if (need_wake) { 5600 wakeup(&wkq->running); 5601 } 5602 } 5603 5604 static void 5605 sctp_mcore_thread(void *arg) 5606 { 5607 5608 struct sctp_mcore_ctrl *wkq; 5609 struct sctp_mcore_queue *qent; 5610 5611 wkq = (struct sctp_mcore_ctrl *)arg; 5612 struct mbuf *m; 5613 int off, v6; 5614 5615 /* Wait for first tickle */ 5616 SCTP_MCORE_LOCK(wkq); 5617 wkq->running = 0; 5618 msleep(&wkq->running, 5619 &wkq->core_mtx, 5620 0, "wait for pkt", 0); 5621 SCTP_MCORE_UNLOCK(wkq); 5622 5623 /* Bind to our cpu */ 5624 thread_lock(curthread); 5625 sched_bind(curthread, wkq->cpuid); 5626 thread_unlock(curthread); 5627 5628 /* Now lets start working */ 5629 SCTP_MCORE_LOCK(wkq); 5630 /* Now grab lock and go */ 5631 for (;;) { 5632 SCTP_MCORE_QLOCK(wkq); 5633 skip_sleep: 5634 wkq->running = 1; 5635 qent = TAILQ_FIRST(&wkq->que); 5636 if (qent) { 5637 TAILQ_REMOVE(&wkq->que, qent, next); 5638 SCTP_MCORE_QUNLOCK(wkq); 5639 CURVNET_SET(qent->vn); 5640 m = qent->m; 5641 off = qent->off; 5642 v6 = qent->v6; 5643 SCTP_FREE(qent, SCTP_M_MCORE); 5644 if (v6 == 0) { 5645 sctp_input_with_port(m, off, 0); 5646 } else { 5647 SCTP_PRINTF("V6 not yet supported\n"); 5648 sctp_m_freem(m); 5649 } 5650 CURVNET_RESTORE(); 5651 SCTP_MCORE_QLOCK(wkq); 5652 } 5653 wkq->running = 0; 5654 if (!TAILQ_EMPTY(&wkq->que)) { 5655 goto skip_sleep; 5656 } 5657 SCTP_MCORE_QUNLOCK(wkq); 5658 msleep(&wkq->running, 5659 &wkq->core_mtx, 5660 0, "wait for pkt", 0); 5661 } 5662 } 5663 5664 static void 5665 sctp_startup_mcore_threads(void) 5666 { 5667 int i, cpu; 5668 5669 if (mp_ncpus == 1) 5670 return; 5671 5672 if (sctp_mcore_workers != NULL) { 5673 /* 5674 * Already been here in some previous vnet? 5675 */ 5676 return; 5677 } 5678 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5679 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5680 SCTP_M_MCORE); 5681 if (sctp_mcore_workers == NULL) { 5682 /* TSNH I hope */ 5683 return; 5684 } 5685 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5686 sizeof(struct sctp_mcore_ctrl))); 5687 /* Init the structures */ 5688 for (i = 0; i <= mp_maxid; i++) { 5689 TAILQ_INIT(&sctp_mcore_workers[i].que); 5690 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5691 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5692 sctp_mcore_workers[i].cpuid = i; 5693 } 5694 if (sctp_cpuarry == NULL) { 5695 SCTP_MALLOC(sctp_cpuarry, int *, 5696 (mp_ncpus * sizeof(int)), 5697 SCTP_M_MCORE); 5698 i = 0; 5699 CPU_FOREACH(cpu) { 5700 sctp_cpuarry[i] = cpu; 5701 i++; 5702 } 5703 } 5704 /* Now start them all */ 5705 CPU_FOREACH(cpu) { 5706 (void)kproc_create(sctp_mcore_thread, 5707 (void *)&sctp_mcore_workers[cpu], 5708 &sctp_mcore_workers[cpu].thread_proc, 5709 RFPROC, 5710 SCTP_KTHREAD_PAGES, 5711 SCTP_MCORE_NAME); 5712 5713 } 5714 } 5715 #endif 5716 5717 void 5718 sctp_pcb_init() 5719 { 5720 /* 5721 * SCTP initialization for the PCB structures should be called by 5722 * the sctp_init() function. 5723 */ 5724 int i; 5725 struct timeval tv; 5726 5727 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5728 /* error I was called twice */ 5729 return; 5730 } 5731 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5732 5733 #if defined(SCTP_LOCAL_TRACE_BUF) 5734 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5735 #endif 5736 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5737 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5738 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5739 SCTP_M_MCORE); 5740 #endif 5741 (void)SCTP_GETTIME_TIMEVAL(&tv); 5742 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5743 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5744 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5745 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5746 #else 5747 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5748 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5749 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5750 #endif 5751 /* init the empty list of (All) Endpoints */ 5752 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5753 5754 5755 /* init the hash table of endpoints */ 5756 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5757 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5758 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5759 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5760 &SCTP_BASE_INFO(hashasocmark)); 5761 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5762 &SCTP_BASE_INFO(hashmark)); 5763 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5764 &SCTP_BASE_INFO(hashtcpmark)); 5765 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5766 5767 5768 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5769 &SCTP_BASE_INFO(hashvrfmark)); 5770 5771 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5772 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5773 /* init the zones */ 5774 /* 5775 * FIX ME: Should check for NULL returns, but if it does fail we are 5776 * doomed to panic anyways... add later maybe. 5777 */ 5778 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5779 sizeof(struct sctp_inpcb), maxsockets); 5780 5781 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5782 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5783 5784 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5785 sizeof(struct sctp_laddr), 5786 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5787 5788 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5789 sizeof(struct sctp_nets), 5790 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5791 5792 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5793 sizeof(struct sctp_tmit_chunk), 5794 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5795 5796 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5797 sizeof(struct sctp_queued_to_read), 5798 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5799 5800 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5801 sizeof(struct sctp_stream_queue_pending), 5802 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5803 5804 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5805 sizeof(struct sctp_asconf), 5806 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5807 5808 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5809 sizeof(struct sctp_asconf_ack), 5810 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5811 5812 5813 /* Master Lock INIT for info structure */ 5814 SCTP_INP_INFO_LOCK_INIT(); 5815 SCTP_STATLOG_INIT_LOCK(); 5816 5817 SCTP_IPI_COUNT_INIT(); 5818 SCTP_IPI_ADDR_INIT(); 5819 #ifdef SCTP_PACKET_LOGGING 5820 SCTP_IP_PKTLOG_INIT(); 5821 #endif 5822 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5823 5824 SCTP_WQ_ADDR_INIT(); 5825 /* not sure if we need all the counts */ 5826 SCTP_BASE_INFO(ipi_count_ep) = 0; 5827 /* assoc/tcb zone info */ 5828 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5829 /* local addrlist zone info */ 5830 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5831 /* remote addrlist zone info */ 5832 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5833 /* chunk info */ 5834 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5835 5836 /* socket queue zone info */ 5837 SCTP_BASE_INFO(ipi_count_readq) = 0; 5838 5839 /* stream out queue cont */ 5840 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5841 5842 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5843 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5844 5845 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5846 5847 /* Init the TIMEWAIT list */ 5848 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5849 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5850 } 5851 sctp_startup_iterator(); 5852 5853 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5854 sctp_startup_mcore_threads(); 5855 #endif 5856 5857 /* 5858 * INIT the default VRF which for BSD is the only one, other O/S's 5859 * may have more. But initially they must start with one and then 5860 * add the VRF's as addresses are added. 5861 */ 5862 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5863 } 5864 5865 /* 5866 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5867 */ 5868 void 5869 sctp_pcb_finish(void) 5870 { 5871 struct sctp_vrflist *vrf_bucket; 5872 struct sctp_vrf *vrf, *nvrf; 5873 struct sctp_ifn *ifn, *nifn; 5874 struct sctp_ifa *ifa, *nifa; 5875 struct sctpvtaghead *chain; 5876 struct sctp_tagblock *twait_block, *prev_twait_block; 5877 struct sctp_laddr *wi, *nwi; 5878 int i; 5879 struct sctp_iterator *it, *nit; 5880 5881 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5882 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5883 return; 5884 } 5885 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5886 /* 5887 * In FreeBSD the iterator thread never exits but we do clean up. 5888 * The only way FreeBSD reaches here is if we have VRF's but we 5889 * still add the ifdef to make it compile on old versions. 5890 */ 5891 retry: 5892 SCTP_IPI_ITERATOR_WQ_LOCK(); 5893 /* 5894 * sctp_iterator_worker() might be working on an it entry without 5895 * holding the lock. We won't find it on the list either and 5896 * continue and free/destroy it. While holding the lock, spin, to 5897 * avoid the race condition as sctp_iterator_worker() will have to 5898 * wait to re-aquire the lock. 5899 */ 5900 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5901 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5902 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5903 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5904 DELAY(10); 5905 goto retry; 5906 } 5907 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5908 if (it->vn != curvnet) { 5909 continue; 5910 } 5911 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5912 if (it->function_atend != NULL) { 5913 (*it->function_atend) (it->pointer, it->val); 5914 } 5915 SCTP_FREE(it, SCTP_M_ITER); 5916 } 5917 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5918 SCTP_ITERATOR_LOCK(); 5919 if ((sctp_it_ctl.cur_it) && 5920 (sctp_it_ctl.cur_it->vn == curvnet)) { 5921 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5922 } 5923 SCTP_ITERATOR_UNLOCK(); 5924 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5925 SCTP_WQ_ADDR_LOCK(); 5926 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5927 LIST_REMOVE(wi, sctp_nxt_addr); 5928 SCTP_DECR_LADDR_COUNT(); 5929 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5930 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5931 } 5932 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5933 } 5934 SCTP_WQ_ADDR_UNLOCK(); 5935 5936 /* 5937 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5938 * destroyed first). 5939 */ 5940 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5941 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5942 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5943 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5944 /* free the ifa */ 5945 LIST_REMOVE(ifa, next_bucket); 5946 LIST_REMOVE(ifa, next_ifa); 5947 SCTP_FREE(ifa, SCTP_M_IFA); 5948 } 5949 /* free the ifn */ 5950 LIST_REMOVE(ifn, next_bucket); 5951 LIST_REMOVE(ifn, next_ifn); 5952 SCTP_FREE(ifn, SCTP_M_IFN); 5953 } 5954 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5955 /* free the vrf */ 5956 LIST_REMOVE(vrf, next_vrf); 5957 SCTP_FREE(vrf, SCTP_M_VRF); 5958 } 5959 /* free the vrf hashes */ 5960 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5961 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5962 5963 /* 5964 * free the TIMEWAIT list elements malloc'd in the function 5965 * sctp_add_vtag_to_timewait()... 5966 */ 5967 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5968 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5969 if (!LIST_EMPTY(chain)) { 5970 prev_twait_block = NULL; 5971 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5972 if (prev_twait_block) { 5973 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5974 } 5975 prev_twait_block = twait_block; 5976 } 5977 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5978 } 5979 } 5980 5981 /* free the locks and mutexes */ 5982 #ifdef SCTP_PACKET_LOGGING 5983 SCTP_IP_PKTLOG_DESTROY(); 5984 #endif 5985 SCTP_IPI_ADDR_DESTROY(); 5986 SCTP_STATLOG_DESTROY(); 5987 SCTP_INP_INFO_LOCK_DESTROY(); 5988 5989 SCTP_WQ_ADDR_DESTROY(); 5990 5991 /* Get rid of other stuff too. */ 5992 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5993 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5994 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5995 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5996 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5997 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5998 5999 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6000 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6001 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6002 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6003 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6004 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6005 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6006 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6007 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6008 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6009 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6010 #endif 6011 } 6012 6013 6014 int 6015 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6016 int offset, int limit, 6017 struct sockaddr *src, struct sockaddr *dst, 6018 struct sockaddr *altsa, uint16_t port) 6019 { 6020 /* 6021 * grub through the INIT pulling addresses and loading them to the 6022 * nets structure in the asoc. The from address in the mbuf should 6023 * also be loaded (if it is not already). This routine can be called 6024 * with either INIT or INIT-ACK's as long as the m points to the IP 6025 * packet and the offset points to the beginning of the parameters. 6026 */ 6027 struct sctp_inpcb *inp; 6028 struct sctp_nets *net, *nnet, *net_tmp; 6029 struct sctp_paramhdr *phdr, param_buf; 6030 struct sctp_tcb *stcb_tmp; 6031 uint16_t ptype, plen; 6032 struct sockaddr *sa; 6033 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6034 struct sctp_auth_random *p_random = NULL; 6035 uint16_t random_len = 0; 6036 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6037 struct sctp_auth_hmac_algo *hmacs = NULL; 6038 uint16_t hmacs_len = 0; 6039 uint8_t saw_asconf = 0; 6040 uint8_t saw_asconf_ack = 0; 6041 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6042 struct sctp_auth_chunk_list *chunks = NULL; 6043 uint16_t num_chunks = 0; 6044 sctp_key_t *new_key; 6045 uint32_t keylen; 6046 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6047 uint8_t peer_supports_ecn; 6048 uint8_t peer_supports_prsctp; 6049 uint8_t peer_supports_auth; 6050 uint8_t peer_supports_asconf; 6051 uint8_t peer_supports_asconf_ack; 6052 uint8_t peer_supports_reconfig; 6053 uint8_t peer_supports_nrsack; 6054 uint8_t peer_supports_pktdrop; 6055 uint8_t peer_supports_idata; 6056 #ifdef INET 6057 struct sockaddr_in sin; 6058 #endif 6059 #ifdef INET6 6060 struct sockaddr_in6 sin6; 6061 #endif 6062 6063 /* First get the destination address setup too. */ 6064 #ifdef INET 6065 memset(&sin, 0, sizeof(sin)); 6066 sin.sin_family = AF_INET; 6067 sin.sin_len = sizeof(sin); 6068 sin.sin_port = stcb->rport; 6069 #endif 6070 #ifdef INET6 6071 memset(&sin6, 0, sizeof(sin6)); 6072 sin6.sin6_family = AF_INET6; 6073 sin6.sin6_len = sizeof(struct sockaddr_in6); 6074 sin6.sin6_port = stcb->rport; 6075 #endif 6076 if (altsa) { 6077 sa = altsa; 6078 } else { 6079 sa = src; 6080 } 6081 peer_supports_idata = 0; 6082 peer_supports_ecn = 0; 6083 peer_supports_prsctp = 0; 6084 peer_supports_auth = 0; 6085 peer_supports_asconf = 0; 6086 peer_supports_reconfig = 0; 6087 peer_supports_nrsack = 0; 6088 peer_supports_pktdrop = 0; 6089 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6090 /* mark all addresses that we have currently on the list */ 6091 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6092 } 6093 /* does the source address already exist? if so skip it */ 6094 inp = stcb->sctp_ep; 6095 atomic_add_int(&stcb->asoc.refcnt, 1); 6096 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6097 atomic_add_int(&stcb->asoc.refcnt, -1); 6098 6099 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6100 /* we must add the source address */ 6101 /* no scope set here since we have a tcb already. */ 6102 switch (sa->sa_family) { 6103 #ifdef INET 6104 case AF_INET: 6105 if (stcb->asoc.scope.ipv4_addr_legal) { 6106 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6107 return (-1); 6108 } 6109 } 6110 break; 6111 #endif 6112 #ifdef INET6 6113 case AF_INET6: 6114 if (stcb->asoc.scope.ipv6_addr_legal) { 6115 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6116 return (-2); 6117 } 6118 } 6119 break; 6120 #endif 6121 default: 6122 break; 6123 } 6124 } else { 6125 if (net_tmp != NULL && stcb_tmp == stcb) { 6126 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6127 } else if (stcb_tmp != stcb) { 6128 /* It belongs to another association? */ 6129 if (stcb_tmp) 6130 SCTP_TCB_UNLOCK(stcb_tmp); 6131 return (-3); 6132 } 6133 } 6134 if (stcb->asoc.state == 0) { 6135 /* the assoc was freed? */ 6136 return (-4); 6137 } 6138 /* now we must go through each of the params. */ 6139 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6140 while (phdr) { 6141 ptype = ntohs(phdr->param_type); 6142 plen = ntohs(phdr->param_length); 6143 /* 6144 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6145 * (uint32_t)ptype, (int)plen); 6146 */ 6147 if (offset + plen > limit) { 6148 break; 6149 } 6150 if (plen == 0) { 6151 break; 6152 } 6153 #ifdef INET 6154 if (ptype == SCTP_IPV4_ADDRESS) { 6155 if (stcb->asoc.scope.ipv4_addr_legal) { 6156 struct sctp_ipv4addr_param *p4, p4_buf; 6157 6158 /* ok get the v4 address and check/add */ 6159 phdr = sctp_get_next_param(m, offset, 6160 (struct sctp_paramhdr *)&p4_buf, 6161 sizeof(p4_buf)); 6162 if (plen != sizeof(struct sctp_ipv4addr_param) || 6163 phdr == NULL) { 6164 return (-5); 6165 } 6166 p4 = (struct sctp_ipv4addr_param *)phdr; 6167 sin.sin_addr.s_addr = p4->addr; 6168 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6169 /* Skip multi-cast addresses */ 6170 goto next_param; 6171 } 6172 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6173 (sin.sin_addr.s_addr == INADDR_ANY)) { 6174 goto next_param; 6175 } 6176 sa = (struct sockaddr *)&sin; 6177 inp = stcb->sctp_ep; 6178 atomic_add_int(&stcb->asoc.refcnt, 1); 6179 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6180 dst, stcb); 6181 atomic_add_int(&stcb->asoc.refcnt, -1); 6182 6183 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6184 inp == NULL) { 6185 /* we must add the source address */ 6186 /* 6187 * no scope set since we have a tcb 6188 * already 6189 */ 6190 6191 /* 6192 * we must validate the state again 6193 * here 6194 */ 6195 add_it_now: 6196 if (stcb->asoc.state == 0) { 6197 /* the assoc was freed? */ 6198 return (-7); 6199 } 6200 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6201 return (-8); 6202 } 6203 } else if (stcb_tmp == stcb) { 6204 if (stcb->asoc.state == 0) { 6205 /* the assoc was freed? */ 6206 return (-10); 6207 } 6208 if (net != NULL) { 6209 /* clear flag */ 6210 net->dest_state &= 6211 ~SCTP_ADDR_NOT_IN_ASSOC; 6212 } 6213 } else { 6214 /* 6215 * strange, address is in another 6216 * assoc? straighten out locks. 6217 */ 6218 if (stcb_tmp) { 6219 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6220 struct mbuf *op_err; 6221 char msg[SCTP_DIAG_INFO_LEN]; 6222 6223 /* 6224 * in setup state we 6225 * abort this guy 6226 */ 6227 snprintf(msg, sizeof(msg), 6228 "%s:%d at %s", __FILE__, __LINE__, __func__); 6229 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6230 msg); 6231 sctp_abort_an_association(stcb_tmp->sctp_ep, 6232 stcb_tmp, op_err, 6233 SCTP_SO_NOT_LOCKED); 6234 goto add_it_now; 6235 } 6236 SCTP_TCB_UNLOCK(stcb_tmp); 6237 } 6238 if (stcb->asoc.state == 0) { 6239 /* the assoc was freed? */ 6240 return (-12); 6241 } 6242 return (-13); 6243 } 6244 } 6245 } else 6246 #endif 6247 #ifdef INET6 6248 if (ptype == SCTP_IPV6_ADDRESS) { 6249 if (stcb->asoc.scope.ipv6_addr_legal) { 6250 /* ok get the v6 address and check/add */ 6251 struct sctp_ipv6addr_param *p6, p6_buf; 6252 6253 phdr = sctp_get_next_param(m, offset, 6254 (struct sctp_paramhdr *)&p6_buf, 6255 sizeof(p6_buf)); 6256 if (plen != sizeof(struct sctp_ipv6addr_param) || 6257 phdr == NULL) { 6258 return (-14); 6259 } 6260 p6 = (struct sctp_ipv6addr_param *)phdr; 6261 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6262 sizeof(p6->addr)); 6263 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6264 /* Skip multi-cast addresses */ 6265 goto next_param; 6266 } 6267 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6268 /* 6269 * Link local make no sense without 6270 * scope 6271 */ 6272 goto next_param; 6273 } 6274 sa = (struct sockaddr *)&sin6; 6275 inp = stcb->sctp_ep; 6276 atomic_add_int(&stcb->asoc.refcnt, 1); 6277 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6278 dst, stcb); 6279 atomic_add_int(&stcb->asoc.refcnt, -1); 6280 if (stcb_tmp == NULL && 6281 (inp == stcb->sctp_ep || inp == NULL)) { 6282 /* 6283 * we must validate the state again 6284 * here 6285 */ 6286 add_it_now6: 6287 if (stcb->asoc.state == 0) { 6288 /* the assoc was freed? */ 6289 return (-16); 6290 } 6291 /* 6292 * we must add the address, no scope 6293 * set 6294 */ 6295 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6296 return (-17); 6297 } 6298 } else if (stcb_tmp == stcb) { 6299 /* 6300 * we must validate the state again 6301 * here 6302 */ 6303 if (stcb->asoc.state == 0) { 6304 /* the assoc was freed? */ 6305 return (-19); 6306 } 6307 if (net != NULL) { 6308 /* clear flag */ 6309 net->dest_state &= 6310 ~SCTP_ADDR_NOT_IN_ASSOC; 6311 } 6312 } else { 6313 /* 6314 * strange, address is in another 6315 * assoc? straighten out locks. 6316 */ 6317 if (stcb_tmp) { 6318 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6319 struct mbuf *op_err; 6320 char msg[SCTP_DIAG_INFO_LEN]; 6321 6322 /* 6323 * in setup state we 6324 * abort this guy 6325 */ 6326 snprintf(msg, sizeof(msg), 6327 "%s:%d at %s", __FILE__, __LINE__, __func__); 6328 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6329 msg); 6330 sctp_abort_an_association(stcb_tmp->sctp_ep, 6331 stcb_tmp, op_err, 6332 SCTP_SO_NOT_LOCKED); 6333 goto add_it_now6; 6334 } 6335 SCTP_TCB_UNLOCK(stcb_tmp); 6336 } 6337 if (stcb->asoc.state == 0) { 6338 /* the assoc was freed? */ 6339 return (-21); 6340 } 6341 return (-22); 6342 } 6343 } 6344 } else 6345 #endif 6346 if (ptype == SCTP_ECN_CAPABLE) { 6347 peer_supports_ecn = 1; 6348 } else if (ptype == SCTP_ULP_ADAPTATION) { 6349 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6350 struct sctp_adaptation_layer_indication ai, 6351 *aip; 6352 6353 phdr = sctp_get_next_param(m, offset, 6354 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6355 aip = (struct sctp_adaptation_layer_indication *)phdr; 6356 if (aip) { 6357 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6358 stcb->asoc.adaptation_needed = 1; 6359 } 6360 } 6361 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6362 struct sctp_asconf_addr_param lstore, *fee; 6363 int lptype; 6364 struct sockaddr *lsa = NULL; 6365 #ifdef INET 6366 struct sctp_asconf_addrv4_param *fii; 6367 #endif 6368 6369 if (stcb->asoc.asconf_supported == 0) { 6370 return (-100); 6371 } 6372 if (plen > sizeof(lstore)) { 6373 return (-23); 6374 } 6375 phdr = sctp_get_next_param(m, offset, 6376 (struct sctp_paramhdr *)&lstore, 6377 plen); 6378 if (phdr == NULL) { 6379 return (-24); 6380 } 6381 fee = (struct sctp_asconf_addr_param *)phdr; 6382 lptype = ntohs(fee->addrp.ph.param_type); 6383 switch (lptype) { 6384 #ifdef INET 6385 case SCTP_IPV4_ADDRESS: 6386 if (plen != 6387 sizeof(struct sctp_asconf_addrv4_param)) { 6388 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6389 (int)sizeof(struct sctp_asconf_addrv4_param), 6390 plen); 6391 } else { 6392 fii = (struct sctp_asconf_addrv4_param *)fee; 6393 sin.sin_addr.s_addr = fii->addrp.addr; 6394 lsa = (struct sockaddr *)&sin; 6395 } 6396 break; 6397 #endif 6398 #ifdef INET6 6399 case SCTP_IPV6_ADDRESS: 6400 if (plen != 6401 sizeof(struct sctp_asconf_addr_param)) { 6402 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6403 (int)sizeof(struct sctp_asconf_addr_param), 6404 plen); 6405 } else { 6406 memcpy(sin6.sin6_addr.s6_addr, 6407 fee->addrp.addr, 6408 sizeof(fee->addrp.addr)); 6409 lsa = (struct sockaddr *)&sin6; 6410 } 6411 break; 6412 #endif 6413 default: 6414 break; 6415 } 6416 if (lsa) { 6417 (void)sctp_set_primary_addr(stcb, sa, NULL); 6418 } 6419 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6420 stcb->asoc.peer_supports_nat = 1; 6421 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6422 /* Peer supports pr-sctp */ 6423 peer_supports_prsctp = 1; 6424 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6425 /* A supported extension chunk */ 6426 struct sctp_supported_chunk_types_param *pr_supported; 6427 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6428 int num_ent, i; 6429 6430 if (plen > sizeof(local_store)) { 6431 return (-35); 6432 } 6433 phdr = sctp_get_next_param(m, offset, 6434 (struct sctp_paramhdr *)&local_store, plen); 6435 if (phdr == NULL) { 6436 return (-25); 6437 } 6438 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6439 num_ent = plen - sizeof(struct sctp_paramhdr); 6440 for (i = 0; i < num_ent; i++) { 6441 switch (pr_supported->chunk_types[i]) { 6442 case SCTP_ASCONF: 6443 peer_supports_asconf = 1; 6444 break; 6445 case SCTP_ASCONF_ACK: 6446 peer_supports_asconf_ack = 1; 6447 break; 6448 case SCTP_FORWARD_CUM_TSN: 6449 peer_supports_prsctp = 1; 6450 break; 6451 case SCTP_PACKET_DROPPED: 6452 peer_supports_pktdrop = 1; 6453 break; 6454 case SCTP_NR_SELECTIVE_ACK: 6455 peer_supports_nrsack = 1; 6456 break; 6457 case SCTP_STREAM_RESET: 6458 peer_supports_reconfig = 1; 6459 break; 6460 case SCTP_AUTHENTICATION: 6461 peer_supports_auth = 1; 6462 break; 6463 case SCTP_IDATA: 6464 peer_supports_idata = 1; 6465 break; 6466 default: 6467 /* one I have not learned yet */ 6468 break; 6469 6470 } 6471 } 6472 } else if (ptype == SCTP_RANDOM) { 6473 if (plen > sizeof(random_store)) 6474 break; 6475 if (got_random) { 6476 /* already processed a RANDOM */ 6477 goto next_param; 6478 } 6479 phdr = sctp_get_next_param(m, offset, 6480 (struct sctp_paramhdr *)random_store, 6481 plen); 6482 if (phdr == NULL) 6483 return (-26); 6484 p_random = (struct sctp_auth_random *)phdr; 6485 random_len = plen - sizeof(*p_random); 6486 /* enforce the random length */ 6487 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6488 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6489 return (-27); 6490 } 6491 got_random = 1; 6492 } else if (ptype == SCTP_HMAC_LIST) { 6493 uint16_t num_hmacs; 6494 uint16_t i; 6495 6496 if (plen > sizeof(hmacs_store)) 6497 break; 6498 if (got_hmacs) { 6499 /* already processed a HMAC list */ 6500 goto next_param; 6501 } 6502 phdr = sctp_get_next_param(m, offset, 6503 (struct sctp_paramhdr *)hmacs_store, 6504 plen); 6505 if (phdr == NULL) 6506 return (-28); 6507 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6508 hmacs_len = plen - sizeof(*hmacs); 6509 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6510 /* validate the hmac list */ 6511 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6512 return (-29); 6513 } 6514 if (stcb->asoc.peer_hmacs != NULL) 6515 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6516 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6517 if (stcb->asoc.peer_hmacs != NULL) { 6518 for (i = 0; i < num_hmacs; i++) { 6519 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6520 ntohs(hmacs->hmac_ids[i])); 6521 } 6522 } 6523 got_hmacs = 1; 6524 } else if (ptype == SCTP_CHUNK_LIST) { 6525 int i; 6526 6527 if (plen > sizeof(chunks_store)) 6528 break; 6529 if (got_chklist) { 6530 /* already processed a Chunks list */ 6531 goto next_param; 6532 } 6533 phdr = sctp_get_next_param(m, offset, 6534 (struct sctp_paramhdr *)chunks_store, 6535 plen); 6536 if (phdr == NULL) 6537 return (-30); 6538 chunks = (struct sctp_auth_chunk_list *)phdr; 6539 num_chunks = plen - sizeof(*chunks); 6540 if (stcb->asoc.peer_auth_chunks != NULL) 6541 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6542 else 6543 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6544 for (i = 0; i < num_chunks; i++) { 6545 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6546 stcb->asoc.peer_auth_chunks); 6547 /* record asconf/asconf-ack if listed */ 6548 if (chunks->chunk_types[i] == SCTP_ASCONF) 6549 saw_asconf = 1; 6550 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6551 saw_asconf_ack = 1; 6552 6553 } 6554 got_chklist = 1; 6555 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6556 (ptype == SCTP_STATE_COOKIE) || 6557 (ptype == SCTP_UNRECOG_PARAM) || 6558 (ptype == SCTP_COOKIE_PRESERVE) || 6559 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6560 (ptype == SCTP_ADD_IP_ADDRESS) || 6561 (ptype == SCTP_DEL_IP_ADDRESS) || 6562 (ptype == SCTP_ERROR_CAUSE_IND) || 6563 (ptype == SCTP_SUCCESS_REPORT)) { 6564 /* don't care */ ; 6565 } else { 6566 if ((ptype & 0x8000) == 0x0000) { 6567 /* 6568 * must stop processing the rest of the 6569 * param's. Any report bits were handled 6570 * with the call to 6571 * sctp_arethere_unrecognized_parameters() 6572 * when the INIT or INIT-ACK was first seen. 6573 */ 6574 break; 6575 } 6576 } 6577 6578 next_param: 6579 offset += SCTP_SIZE32(plen); 6580 if (offset >= limit) { 6581 break; 6582 } 6583 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6584 sizeof(param_buf)); 6585 } 6586 /* Now check to see if we need to purge any addresses */ 6587 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6588 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6589 SCTP_ADDR_NOT_IN_ASSOC) { 6590 /* This address has been removed from the asoc */ 6591 /* remove and free it */ 6592 stcb->asoc.numnets--; 6593 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6594 sctp_free_remote_addr(net); 6595 if (net == stcb->asoc.primary_destination) { 6596 stcb->asoc.primary_destination = NULL; 6597 sctp_select_primary_destination(stcb); 6598 } 6599 } 6600 } 6601 if ((stcb->asoc.ecn_supported == 1) && 6602 (peer_supports_ecn == 0)) { 6603 stcb->asoc.ecn_supported = 0; 6604 } 6605 if ((stcb->asoc.prsctp_supported == 1) && 6606 (peer_supports_prsctp == 0)) { 6607 stcb->asoc.prsctp_supported = 0; 6608 } 6609 if ((stcb->asoc.auth_supported == 1) && 6610 ((peer_supports_auth == 0) || 6611 (got_random == 0) || (got_hmacs == 0))) { 6612 stcb->asoc.auth_supported = 0; 6613 } 6614 if ((stcb->asoc.asconf_supported == 1) && 6615 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6616 (stcb->asoc.auth_supported == 0) || 6617 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6618 stcb->asoc.asconf_supported = 0; 6619 } 6620 if ((stcb->asoc.reconfig_supported == 1) && 6621 (peer_supports_reconfig == 0)) { 6622 stcb->asoc.reconfig_supported = 0; 6623 } 6624 if ((stcb->asoc.idata_supported == 1) && 6625 (peer_supports_idata == 0)) { 6626 stcb->asoc.idata_supported = 0; 6627 } 6628 if ((stcb->asoc.nrsack_supported == 1) && 6629 (peer_supports_nrsack == 0)) { 6630 stcb->asoc.nrsack_supported = 0; 6631 } 6632 if ((stcb->asoc.pktdrop_supported == 1) && 6633 (peer_supports_pktdrop == 0)) { 6634 stcb->asoc.pktdrop_supported = 0; 6635 } 6636 /* validate authentication required parameters */ 6637 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6638 /* peer does not support auth but sent a chunks list? */ 6639 return (-31); 6640 } 6641 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6642 /* peer supports asconf but not auth? */ 6643 return (-32); 6644 } else if ((peer_supports_asconf == 1) && 6645 (peer_supports_auth == 1) && 6646 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6647 return (-33); 6648 } 6649 /* concatenate the full random key */ 6650 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6651 if (chunks != NULL) { 6652 keylen += sizeof(*chunks) + num_chunks; 6653 } 6654 new_key = sctp_alloc_key(keylen); 6655 if (new_key != NULL) { 6656 /* copy in the RANDOM */ 6657 if (p_random != NULL) { 6658 keylen = sizeof(*p_random) + random_len; 6659 bcopy(p_random, new_key->key, keylen); 6660 } 6661 /* append in the AUTH chunks */ 6662 if (chunks != NULL) { 6663 bcopy(chunks, new_key->key + keylen, 6664 sizeof(*chunks) + num_chunks); 6665 keylen += sizeof(*chunks) + num_chunks; 6666 } 6667 /* append in the HMACs */ 6668 if (hmacs != NULL) { 6669 bcopy(hmacs, new_key->key + keylen, 6670 sizeof(*hmacs) + hmacs_len); 6671 } 6672 } else { 6673 /* failed to get memory for the key */ 6674 return (-34); 6675 } 6676 if (stcb->asoc.authinfo.peer_random != NULL) 6677 sctp_free_key(stcb->asoc.authinfo.peer_random); 6678 stcb->asoc.authinfo.peer_random = new_key; 6679 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6680 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6681 6682 return (0); 6683 } 6684 6685 int 6686 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6687 struct sctp_nets *net) 6688 { 6689 /* make sure the requested primary address exists in the assoc */ 6690 if (net == NULL && sa) 6691 net = sctp_findnet(stcb, sa); 6692 6693 if (net == NULL) { 6694 /* didn't find the requested primary address! */ 6695 return (-1); 6696 } else { 6697 /* set the primary address */ 6698 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6699 /* Must be confirmed, so queue to set */ 6700 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6701 return (0); 6702 } 6703 stcb->asoc.primary_destination = net; 6704 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6705 sctp_free_remote_addr(stcb->asoc.alternate); 6706 stcb->asoc.alternate = NULL; 6707 } 6708 net = TAILQ_FIRST(&stcb->asoc.nets); 6709 if (net != stcb->asoc.primary_destination) { 6710 /* 6711 * first one on the list is NOT the primary 6712 * sctp_cmpaddr() is much more efficient if the 6713 * primary is the first on the list, make it so. 6714 */ 6715 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6716 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6717 } 6718 return (0); 6719 } 6720 } 6721 6722 int 6723 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6724 { 6725 /* 6726 * This function serves two purposes. It will see if a TAG can be 6727 * re-used and return 1 for yes it is ok and 0 for don't use that 6728 * tag. A secondary function it will do is purge out old tags that 6729 * can be removed. 6730 */ 6731 struct sctpvtaghead *chain; 6732 struct sctp_tagblock *twait_block; 6733 struct sctpasochead *head; 6734 struct sctp_tcb *stcb; 6735 int i; 6736 6737 SCTP_INP_INFO_RLOCK(); 6738 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6739 SCTP_BASE_INFO(hashasocmark))]; 6740 LIST_FOREACH(stcb, head, sctp_asocs) { 6741 /* 6742 * We choose not to lock anything here. TCB's can't be 6743 * removed since we have the read lock, so they can't be 6744 * freed on us, same thing for the INP. I may be wrong with 6745 * this assumption, but we will go with it for now :-) 6746 */ 6747 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6748 continue; 6749 } 6750 if (stcb->asoc.my_vtag == tag) { 6751 /* candidate */ 6752 if (stcb->rport != rport) { 6753 continue; 6754 } 6755 if (stcb->sctp_ep->sctp_lport != lport) { 6756 continue; 6757 } 6758 /* Its a used tag set */ 6759 SCTP_INP_INFO_RUNLOCK(); 6760 return (0); 6761 } 6762 } 6763 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6764 /* Now what about timed wait ? */ 6765 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6766 /* 6767 * Block(s) are present, lets see if we have this tag in the 6768 * list 6769 */ 6770 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6771 if (twait_block->vtag_block[i].v_tag == 0) { 6772 /* not used */ 6773 continue; 6774 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6775 now->tv_sec) { 6776 /* Audit expires this guy */ 6777 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6778 twait_block->vtag_block[i].v_tag = 0; 6779 twait_block->vtag_block[i].lport = 0; 6780 twait_block->vtag_block[i].rport = 0; 6781 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6782 (twait_block->vtag_block[i].lport == lport) && 6783 (twait_block->vtag_block[i].rport == rport)) { 6784 /* Bad tag, sorry :< */ 6785 SCTP_INP_INFO_RUNLOCK(); 6786 return (0); 6787 } 6788 } 6789 } 6790 SCTP_INP_INFO_RUNLOCK(); 6791 return (1); 6792 } 6793 6794 static void 6795 sctp_drain_mbufs(struct sctp_tcb *stcb) 6796 { 6797 /* 6798 * We must hunt this association for MBUF's past the cumack (i.e. 6799 * out of order data that we can renege on). 6800 */ 6801 struct sctp_association *asoc; 6802 struct sctp_tmit_chunk *chk, *nchk; 6803 uint32_t cumulative_tsn_p1; 6804 struct sctp_queued_to_read *ctl, *nctl; 6805 int cnt, strmat; 6806 uint32_t gap, i; 6807 int fnd = 0; 6808 6809 /* We look for anything larger than the cum-ack + 1 */ 6810 6811 asoc = &stcb->asoc; 6812 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6813 /* none we can reneg on. */ 6814 return; 6815 } 6816 SCTP_STAT_INCR(sctps_protocol_drains_done); 6817 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6818 cnt = 0; 6819 /* Ok that was fun, now we will drain all the inbound streams? */ 6820 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6821 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next_instrm, nctl) { 6822 #ifdef INVARIANTS 6823 if (ctl->on_strm_q != SCTP_ON_ORDERED) { 6824 panic("Huh control: %p on_q: %d -- not ordered?", 6825 ctl, ctl->on_strm_q); 6826 } 6827 #endif 6828 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6829 /* Yep it is above cum-ack */ 6830 cnt++; 6831 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6832 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6833 sctp_ucount_decr(asoc->cnt_on_all_streams); 6834 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6835 if (ctl->on_read_q) { 6836 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next); 6837 ctl->on_read_q = 0; 6838 } 6839 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next_instrm); 6840 ctl->on_strm_q = 0; 6841 if (ctl->data) { 6842 sctp_m_freem(ctl->data); 6843 ctl->data = NULL; 6844 } 6845 sctp_free_remote_addr(ctl->whoFrom); 6846 /* Now its reasm? */ 6847 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 6848 cnt++; 6849 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6850 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6851 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6852 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6853 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 6854 if (chk->data) { 6855 sctp_m_freem(chk->data); 6856 chk->data = NULL; 6857 } 6858 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6859 } 6860 sctp_free_a_readq(stcb, ctl); 6861 } 6862 } 6863 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].uno_inqueue, next_instrm, nctl) { 6864 #ifdef INVARIANTS 6865 if (ctl->on_strm_q != SCTP_ON_UNORDERED) { 6866 panic("Huh control: %p on_q: %d -- not unordered?", 6867 ctl, ctl->on_strm_q); 6868 } 6869 #endif 6870 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6871 /* Yep it is above cum-ack */ 6872 cnt++; 6873 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6874 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6875 sctp_ucount_decr(asoc->cnt_on_all_streams); 6876 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6877 if (ctl->on_read_q) { 6878 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next); 6879 ctl->on_read_q = 0; 6880 } 6881 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, ctl, next_instrm); 6882 ctl->on_strm_q = 0; 6883 if (ctl->data) { 6884 sctp_m_freem(ctl->data); 6885 ctl->data = NULL; 6886 } 6887 sctp_free_remote_addr(ctl->whoFrom); 6888 /* Now its reasm? */ 6889 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 6890 cnt++; 6891 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6892 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6893 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6894 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6895 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 6896 if (chk->data) { 6897 sctp_m_freem(chk->data); 6898 chk->data = NULL; 6899 } 6900 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6901 } 6902 sctp_free_a_readq(stcb, ctl); 6903 } 6904 } 6905 } 6906 if (cnt) { 6907 /* We must back down to see what the new highest is */ 6908 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6909 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6910 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6911 asoc->highest_tsn_inside_map = i; 6912 fnd = 1; 6913 break; 6914 } 6915 } 6916 if (!fnd) { 6917 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6918 } 6919 /* 6920 * Question, should we go through the delivery queue? The 6921 * only reason things are on here is the app not reading OR 6922 * a p-d-api up. An attacker COULD send enough in to 6923 * initiate the PD-API and then send a bunch of stuff to 6924 * other streams... these would wind up on the delivery 6925 * queue.. and then we would not get to them. But in order 6926 * to do this I then have to back-track and un-deliver 6927 * sequence numbers in streams.. el-yucko. I think for now 6928 * we will NOT look at the delivery queue and leave it to be 6929 * something to consider later. An alternative would be to 6930 * abort the P-D-API with a notification and then deliver 6931 * the data.... Or another method might be to keep track of 6932 * how many times the situation occurs and if we see a 6933 * possible attack underway just abort the association. 6934 */ 6935 #ifdef SCTP_DEBUG 6936 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6937 #endif 6938 /* 6939 * Now do we need to find a new 6940 * asoc->highest_tsn_inside_map? 6941 */ 6942 asoc->last_revoke_count = cnt; 6943 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6944 /* sa_ignore NO_NULL_CHK */ 6945 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6946 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6947 } 6948 /* 6949 * Another issue, in un-setting the TSN's in the mapping array we 6950 * DID NOT adjust the highest_tsn marker. This will cause one of 6951 * two things to occur. It may cause us to do extra work in checking 6952 * for our mapping array movement. More importantly it may cause us 6953 * to SACK every datagram. This may not be a bad thing though since 6954 * we will recover once we get our cum-ack above and all this stuff 6955 * we dumped recovered. 6956 */ 6957 } 6958 6959 void 6960 sctp_drain() 6961 { 6962 /* 6963 * We must walk the PCB lists for ALL associations here. The system 6964 * is LOW on MBUF's and needs help. This is where reneging will 6965 * occur. We really hope this does NOT happen! 6966 */ 6967 VNET_ITERATOR_DECL(vnet_iter); 6968 VNET_LIST_RLOCK_NOSLEEP(); 6969 VNET_FOREACH(vnet_iter) { 6970 CURVNET_SET(vnet_iter); 6971 struct sctp_inpcb *inp; 6972 struct sctp_tcb *stcb; 6973 6974 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6975 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6976 #ifdef VIMAGE 6977 continue; 6978 #else 6979 return; 6980 #endif 6981 } 6982 SCTP_INP_INFO_RLOCK(); 6983 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6984 /* For each endpoint */ 6985 SCTP_INP_RLOCK(inp); 6986 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6987 /* For each association */ 6988 SCTP_TCB_LOCK(stcb); 6989 sctp_drain_mbufs(stcb); 6990 SCTP_TCB_UNLOCK(stcb); 6991 } 6992 SCTP_INP_RUNLOCK(inp); 6993 } 6994 SCTP_INP_INFO_RUNLOCK(); 6995 CURVNET_RESTORE(); 6996 } 6997 VNET_LIST_RUNLOCK_NOSLEEP(); 6998 } 6999 7000 /* 7001 * start a new iterator 7002 * iterates through all endpoints and associations based on the pcb_state 7003 * flags and asoc_state. "af" (mandatory) is executed for all matching 7004 * assocs and "ef" (optional) is executed when the iterator completes. 7005 * "inpf" (optional) is executed for each new endpoint as it is being 7006 * iterated through. inpe (optional) is called when the inp completes 7007 * its way through all the stcbs. 7008 */ 7009 int 7010 sctp_initiate_iterator(inp_func inpf, 7011 asoc_func af, 7012 inp_func inpe, 7013 uint32_t pcb_state, 7014 uint32_t pcb_features, 7015 uint32_t asoc_state, 7016 void *argp, 7017 uint32_t argi, 7018 end_func ef, 7019 struct sctp_inpcb *s_inp, 7020 uint8_t chunk_output_off) 7021 { 7022 struct sctp_iterator *it = NULL; 7023 7024 if (af == NULL) { 7025 return (-1); 7026 } 7027 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7028 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7029 SCTP_BASE_VAR(sctp_pcb_initialized)); 7030 return (-1); 7031 } 7032 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7033 SCTP_M_ITER); 7034 if (it == NULL) { 7035 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7036 return (ENOMEM); 7037 } 7038 memset(it, 0, sizeof(*it)); 7039 it->function_assoc = af; 7040 it->function_inp = inpf; 7041 if (inpf) 7042 it->done_current_ep = 0; 7043 else 7044 it->done_current_ep = 1; 7045 it->function_atend = ef; 7046 it->pointer = argp; 7047 it->val = argi; 7048 it->pcb_flags = pcb_state; 7049 it->pcb_features = pcb_features; 7050 it->asoc_state = asoc_state; 7051 it->function_inp_end = inpe; 7052 it->no_chunk_output = chunk_output_off; 7053 it->vn = curvnet; 7054 if (s_inp) { 7055 /* Assume lock is held here */ 7056 it->inp = s_inp; 7057 SCTP_INP_INCR_REF(it->inp); 7058 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7059 } else { 7060 SCTP_INP_INFO_RLOCK(); 7061 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7062 if (it->inp) { 7063 SCTP_INP_INCR_REF(it->inp); 7064 } 7065 SCTP_INP_INFO_RUNLOCK(); 7066 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7067 7068 } 7069 SCTP_IPI_ITERATOR_WQ_LOCK(); 7070 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7071 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7072 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7073 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7074 SCTP_FREE(it, SCTP_M_ITER); 7075 return (-1); 7076 } 7077 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7078 if (sctp_it_ctl.iterator_running == 0) { 7079 sctp_wakeup_iterator(); 7080 } 7081 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7082 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7083 return (0); 7084 }
Cache object: 46a184cfb7c97efe3bc2a2a4dbf6b73b
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