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("$FreeBSD$"); 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 } 186 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192 } 193 194 195 struct sctp_ifn * 196 sctp_find_ifn(void *ifn, uint32_t ifn_index) 197 { 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215 } 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 234 void 235 sctp_free_vrf(struct sctp_vrf *vrf) 236 { 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247 } 248 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 264 void 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266 { 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273 } 274 275 276 void 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278 { 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287 } 288 289 290 static void 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292 { 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310 } 311 312 313 void 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316 { 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352 out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354 } 355 356 357 void 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360 { 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396 out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398 } 399 400 401 /*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406 static void 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408 { 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418 #ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422 #endif 423 #ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427 #endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 434 sctp_ifnp->registered_af = ifa_af; 435 } 436 } 437 438 439 /*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445 static void 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447 { 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453 #ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457 #endif 458 #ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462 #endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488 } 489 490 491 struct sctp_ifa * 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496 { 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505 #ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508 #endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532 #ifdef INVARIANTS 533 panic("No memory for IFN"); 534 #endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608 #ifdef INVARIANTS 609 panic("No memory for IFA"); 610 #endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623 #ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = &sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641 #endif 642 #ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = &sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661 #endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 memset(wi, 0, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 714 (struct sctp_inpcb *)NULL, 715 (struct sctp_tcb *)NULL, 716 (struct sctp_nets *)NULL); 717 SCTP_WQ_ADDR_UNLOCK(); 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 } 738 739 #ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742 #endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789 #ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795 #endif 796 797 out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 memset(wi, 0, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 826 (struct sctp_inpcb *)NULL, 827 (struct sctp_tcb *)NULL, 828 (struct sctp_nets *)NULL); 829 SCTP_WQ_ADDR_UNLOCK(); 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 } 867 868 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 869 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 870 if ((loopback_scope == 0) && 871 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 872 continue; 873 } 874 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 875 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 876 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 877 /* 878 * We allow pending addresses, where 879 * we have sent an asconf-add to be 880 * considered valid. 881 */ 882 continue; 883 } 884 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 885 continue; 886 } 887 switch (sctp_ifa->address.sa.sa_family) { 888 #ifdef INET 889 case AF_INET: 890 if (ipv4_addr_legal) { 891 struct sockaddr_in *sin, 892 *rsin; 893 894 sin = &sctp_ifa->address.sin; 895 rsin = (struct sockaddr_in *)to; 896 if ((ipv4_local_scope == 0) && 897 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 898 continue; 899 } 900 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 901 &sin->sin_addr) != 0) { 902 continue; 903 } 904 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 905 SCTP_IPI_ADDR_RUNLOCK(); 906 return (1); 907 } 908 } 909 break; 910 #endif 911 #ifdef INET6 912 case AF_INET6: 913 if (ipv6_addr_legal) { 914 struct sockaddr_in6 *sin6, 915 *rsin6; 916 917 sin6 = &sctp_ifa->address.sin6; 918 rsin6 = (struct sockaddr_in6 *)to; 919 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 920 &sin6->sin6_addr) != 0) { 921 continue; 922 } 923 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 924 if (local_scope == 0) 925 continue; 926 if (sin6->sin6_scope_id == 0) { 927 if (sa6_recoverscope(sin6) != 0) 928 continue; 929 } 930 } 931 if ((site_scope == 0) && 932 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 933 continue; 934 } 935 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 936 SCTP_IPI_ADDR_RUNLOCK(); 937 return (1); 938 } 939 } 940 break; 941 #endif 942 default: 943 /* TSNH */ 944 break; 945 } 946 } 947 } 948 } else { 949 struct sctp_laddr *laddr; 950 951 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 952 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 953 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 954 continue; 955 } 956 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 957 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 958 /* 959 * We allow pending addresses, where we have 960 * sent an asconf-add to be considered 961 * valid. 962 */ 963 continue; 964 } 965 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 966 continue; 967 } 968 switch (to->sa_family) { 969 #ifdef INET 970 case AF_INET: 971 { 972 struct sockaddr_in *sin, *rsin; 973 974 sin = &laddr->ifa->address.sin; 975 rsin = (struct sockaddr_in *)to; 976 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 977 SCTP_IPI_ADDR_RUNLOCK(); 978 return (1); 979 } 980 break; 981 } 982 #endif 983 #ifdef INET6 984 case AF_INET6: 985 { 986 struct sockaddr_in6 *sin6, *rsin6; 987 988 sin6 = &laddr->ifa->address.sin6; 989 rsin6 = (struct sockaddr_in6 *)to; 990 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 991 SCTP_IPI_ADDR_RUNLOCK(); 992 return (1); 993 } 994 break; 995 } 996 997 #endif 998 default: 999 /* TSNH */ 1000 break; 1001 } 1002 1003 } 1004 } 1005 SCTP_IPI_ADDR_RUNLOCK(); 1006 return (0); 1007 } 1008 1009 1010 static struct sctp_tcb * 1011 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1012 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1013 { 1014 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1015 /* 1016 * If we support the TCP model, then we must now dig through to see 1017 * if we can find our endpoint in the list of tcp ep's. 1018 */ 1019 uint16_t lport, rport; 1020 struct sctppcbhead *ephead; 1021 struct sctp_inpcb *inp; 1022 struct sctp_laddr *laddr; 1023 struct sctp_tcb *stcb; 1024 struct sctp_nets *net; 1025 1026 if ((to == NULL) || (from == NULL)) { 1027 return (NULL); 1028 } 1029 1030 switch (to->sa_family) { 1031 #ifdef INET 1032 case AF_INET: 1033 if (from->sa_family == AF_INET) { 1034 lport = ((struct sockaddr_in *)to)->sin_port; 1035 rport = ((struct sockaddr_in *)from)->sin_port; 1036 } else { 1037 return (NULL); 1038 } 1039 break; 1040 #endif 1041 #ifdef INET6 1042 case AF_INET6: 1043 if (from->sa_family == AF_INET6) { 1044 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1045 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1046 } else { 1047 return (NULL); 1048 } 1049 break; 1050 #endif 1051 default: 1052 return (NULL); 1053 } 1054 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1055 /* 1056 * Ok now for each of the guys in this bucket we must look and see: 1057 * - Does the remote port match. - Does there single association's 1058 * addresses match this address (to). If so we update p_ep to point 1059 * to this ep and return the tcb from it. 1060 */ 1061 LIST_FOREACH(inp, ephead, sctp_hash) { 1062 SCTP_INP_RLOCK(inp); 1063 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1064 SCTP_INP_RUNLOCK(inp); 1065 continue; 1066 } 1067 if (lport != inp->sctp_lport) { 1068 SCTP_INP_RUNLOCK(inp); 1069 continue; 1070 } 1071 switch (to->sa_family) { 1072 #ifdef INET 1073 case AF_INET: 1074 { 1075 struct sockaddr_in *sin; 1076 1077 sin = (struct sockaddr_in *)to; 1078 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1079 &sin->sin_addr) != 0) { 1080 SCTP_INP_RUNLOCK(inp); 1081 continue; 1082 } 1083 break; 1084 } 1085 #endif 1086 #ifdef INET6 1087 case AF_INET6: 1088 { 1089 struct sockaddr_in6 *sin6; 1090 1091 sin6 = (struct sockaddr_in6 *)to; 1092 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1093 &sin6->sin6_addr) != 0) { 1094 SCTP_INP_RUNLOCK(inp); 1095 continue; 1096 } 1097 break; 1098 } 1099 #endif 1100 default: 1101 SCTP_INP_RUNLOCK(inp); 1102 continue; 1103 } 1104 if (inp->def_vrf_id != vrf_id) { 1105 SCTP_INP_RUNLOCK(inp); 1106 continue; 1107 } 1108 /* check to see if the ep has one of the addresses */ 1109 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1110 /* We are NOT bound all, so look further */ 1111 int match = 0; 1112 1113 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1114 1115 if (laddr->ifa == NULL) { 1116 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1117 continue; 1118 } 1119 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1120 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1121 continue; 1122 } 1123 if (laddr->ifa->address.sa.sa_family == 1124 to->sa_family) { 1125 /* see if it matches */ 1126 #ifdef INET 1127 if (from->sa_family == AF_INET) { 1128 struct sockaddr_in *intf_addr, 1129 *sin; 1130 1131 intf_addr = &laddr->ifa->address.sin; 1132 sin = (struct sockaddr_in *)to; 1133 if (sin->sin_addr.s_addr == 1134 intf_addr->sin_addr.s_addr) { 1135 match = 1; 1136 break; 1137 } 1138 } 1139 #endif 1140 #ifdef INET6 1141 if (from->sa_family == AF_INET6) { 1142 struct sockaddr_in6 *intf_addr6; 1143 struct sockaddr_in6 *sin6; 1144 1145 sin6 = (struct sockaddr_in6 *) 1146 to; 1147 intf_addr6 = &laddr->ifa->address.sin6; 1148 1149 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1150 intf_addr6)) { 1151 match = 1; 1152 break; 1153 } 1154 } 1155 #endif 1156 } 1157 } 1158 if (match == 0) { 1159 /* This endpoint does not have this address */ 1160 SCTP_INP_RUNLOCK(inp); 1161 continue; 1162 } 1163 } 1164 /* 1165 * Ok if we hit here the ep has the address, does it hold 1166 * the tcb? 1167 */ 1168 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1169 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1170 if (stcb == NULL) { 1171 SCTP_INP_RUNLOCK(inp); 1172 continue; 1173 } 1174 SCTP_TCB_LOCK(stcb); 1175 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1176 SCTP_TCB_UNLOCK(stcb); 1177 SCTP_INP_RUNLOCK(inp); 1178 continue; 1179 } 1180 if (stcb->rport != rport) { 1181 /* remote port does not match. */ 1182 SCTP_TCB_UNLOCK(stcb); 1183 SCTP_INP_RUNLOCK(inp); 1184 continue; 1185 } 1186 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1187 SCTP_TCB_UNLOCK(stcb); 1188 SCTP_INP_RUNLOCK(inp); 1189 continue; 1190 } 1191 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1192 SCTP_TCB_UNLOCK(stcb); 1193 SCTP_INP_RUNLOCK(inp); 1194 continue; 1195 } 1196 /* Does this TCB have a matching address? */ 1197 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1198 1199 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1200 /* not the same family, can't be a match */ 1201 continue; 1202 } 1203 switch (from->sa_family) { 1204 #ifdef INET 1205 case AF_INET: 1206 { 1207 struct sockaddr_in *sin, *rsin; 1208 1209 sin = (struct sockaddr_in *)&net->ro._l_addr; 1210 rsin = (struct sockaddr_in *)from; 1211 if (sin->sin_addr.s_addr == 1212 rsin->sin_addr.s_addr) { 1213 /* found it */ 1214 if (netp != NULL) { 1215 *netp = net; 1216 } 1217 /* 1218 * Update the endpoint 1219 * pointer 1220 */ 1221 *inp_p = inp; 1222 SCTP_INP_RUNLOCK(inp); 1223 return (stcb); 1224 } 1225 break; 1226 } 1227 #endif 1228 #ifdef INET6 1229 case AF_INET6: 1230 { 1231 struct sockaddr_in6 *sin6, *rsin6; 1232 1233 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1234 rsin6 = (struct sockaddr_in6 *)from; 1235 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1236 rsin6)) { 1237 /* found it */ 1238 if (netp != NULL) { 1239 *netp = net; 1240 } 1241 /* 1242 * Update the endpoint 1243 * pointer 1244 */ 1245 *inp_p = inp; 1246 SCTP_INP_RUNLOCK(inp); 1247 return (stcb); 1248 } 1249 break; 1250 } 1251 #endif 1252 default: 1253 /* TSNH */ 1254 break; 1255 } 1256 } 1257 SCTP_TCB_UNLOCK(stcb); 1258 SCTP_INP_RUNLOCK(inp); 1259 } 1260 return (NULL); 1261 } 1262 1263 1264 /* 1265 * rules for use 1266 * 1267 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1268 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1269 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1270 * NULL. 1271 */ 1272 1273 struct sctp_tcb * 1274 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1275 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1276 { 1277 struct sctpasochead *head; 1278 struct sctp_inpcb *inp; 1279 struct sctp_tcb *stcb = NULL; 1280 struct sctp_nets *net; 1281 uint16_t rport; 1282 1283 inp = *inp_p; 1284 switch (remote->sa_family) { 1285 #ifdef INET 1286 case AF_INET: 1287 rport = (((struct sockaddr_in *)remote)->sin_port); 1288 break; 1289 #endif 1290 #ifdef INET6 1291 case AF_INET6: 1292 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1293 break; 1294 #endif 1295 default: 1296 return (NULL); 1297 } 1298 if (locked_tcb) { 1299 /* 1300 * UN-lock so we can do proper locking here this occurs when 1301 * called from load_addresses_from_init. 1302 */ 1303 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1304 SCTP_TCB_UNLOCK(locked_tcb); 1305 } 1306 SCTP_INP_INFO_RLOCK(); 1307 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1308 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1309 /*- 1310 * Now either this guy is our listener or it's the 1311 * connector. If it is the one that issued the connect, then 1312 * it's only chance is to be the first TCB in the list. If 1313 * it is the acceptor, then do the special_lookup to hash 1314 * and find the real inp. 1315 */ 1316 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1317 /* to is peer addr, from is my addr */ 1318 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1319 netp, inp->def_vrf_id); 1320 if ((stcb != NULL) && (locked_tcb == NULL)) { 1321 /* we have a locked tcb, lower refcount */ 1322 SCTP_INP_DECR_REF(inp); 1323 } 1324 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1325 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1326 SCTP_TCB_LOCK(locked_tcb); 1327 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1328 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1329 } 1330 SCTP_INP_INFO_RUNLOCK(); 1331 return (stcb); 1332 } else { 1333 SCTP_INP_WLOCK(inp); 1334 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1335 goto null_return; 1336 } 1337 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1338 if (stcb == NULL) { 1339 goto null_return; 1340 } 1341 SCTP_TCB_LOCK(stcb); 1342 1343 if (stcb->rport != rport) { 1344 /* remote port does not match. */ 1345 SCTP_TCB_UNLOCK(stcb); 1346 goto null_return; 1347 } 1348 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1349 SCTP_TCB_UNLOCK(stcb); 1350 goto null_return; 1351 } 1352 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1353 SCTP_TCB_UNLOCK(stcb); 1354 goto null_return; 1355 } 1356 /* now look at the list of remote addresses */ 1357 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1358 #ifdef INVARIANTS 1359 if (net == (TAILQ_NEXT(net, sctp_next))) { 1360 panic("Corrupt net list"); 1361 } 1362 #endif 1363 if (net->ro._l_addr.sa.sa_family != 1364 remote->sa_family) { 1365 /* not the same family */ 1366 continue; 1367 } 1368 switch (remote->sa_family) { 1369 #ifdef INET 1370 case AF_INET: 1371 { 1372 struct sockaddr_in *sin, 1373 *rsin; 1374 1375 sin = (struct sockaddr_in *) 1376 &net->ro._l_addr; 1377 rsin = (struct sockaddr_in *)remote; 1378 if (sin->sin_addr.s_addr == 1379 rsin->sin_addr.s_addr) { 1380 /* found it */ 1381 if (netp != NULL) { 1382 *netp = net; 1383 } 1384 if (locked_tcb == NULL) { 1385 SCTP_INP_DECR_REF(inp); 1386 } else if (locked_tcb != stcb) { 1387 SCTP_TCB_LOCK(locked_tcb); 1388 } 1389 if (locked_tcb) { 1390 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1391 } 1392 1393 SCTP_INP_WUNLOCK(inp); 1394 SCTP_INP_INFO_RUNLOCK(); 1395 return (stcb); 1396 } 1397 break; 1398 } 1399 #endif 1400 #ifdef INET6 1401 case AF_INET6: 1402 { 1403 struct sockaddr_in6 *sin6, 1404 *rsin6; 1405 1406 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1407 rsin6 = (struct sockaddr_in6 *)remote; 1408 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1409 rsin6)) { 1410 /* found it */ 1411 if (netp != NULL) { 1412 *netp = net; 1413 } 1414 if (locked_tcb == NULL) { 1415 SCTP_INP_DECR_REF(inp); 1416 } else if (locked_tcb != stcb) { 1417 SCTP_TCB_LOCK(locked_tcb); 1418 } 1419 if (locked_tcb) { 1420 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1421 } 1422 SCTP_INP_WUNLOCK(inp); 1423 SCTP_INP_INFO_RUNLOCK(); 1424 return (stcb); 1425 } 1426 break; 1427 } 1428 #endif 1429 default: 1430 /* TSNH */ 1431 break; 1432 } 1433 } 1434 SCTP_TCB_UNLOCK(stcb); 1435 } 1436 } else { 1437 SCTP_INP_WLOCK(inp); 1438 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1439 goto null_return; 1440 } 1441 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1442 inp->sctp_hashmark)]; 1443 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1444 if (stcb->rport != rport) { 1445 /* remote port does not match */ 1446 continue; 1447 } 1448 SCTP_TCB_LOCK(stcb); 1449 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1450 SCTP_TCB_UNLOCK(stcb); 1451 continue; 1452 } 1453 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1454 SCTP_TCB_UNLOCK(stcb); 1455 continue; 1456 } 1457 /* now look at the list of remote addresses */ 1458 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1459 #ifdef INVARIANTS 1460 if (net == (TAILQ_NEXT(net, sctp_next))) { 1461 panic("Corrupt net list"); 1462 } 1463 #endif 1464 if (net->ro._l_addr.sa.sa_family != 1465 remote->sa_family) { 1466 /* not the same family */ 1467 continue; 1468 } 1469 switch (remote->sa_family) { 1470 #ifdef INET 1471 case AF_INET: 1472 { 1473 struct sockaddr_in *sin, 1474 *rsin; 1475 1476 sin = (struct sockaddr_in *) 1477 &net->ro._l_addr; 1478 rsin = (struct sockaddr_in *)remote; 1479 if (sin->sin_addr.s_addr == 1480 rsin->sin_addr.s_addr) { 1481 /* found it */ 1482 if (netp != NULL) { 1483 *netp = net; 1484 } 1485 if (locked_tcb == NULL) { 1486 SCTP_INP_DECR_REF(inp); 1487 } else if (locked_tcb != stcb) { 1488 SCTP_TCB_LOCK(locked_tcb); 1489 } 1490 if (locked_tcb) { 1491 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1492 } 1493 SCTP_INP_WUNLOCK(inp); 1494 SCTP_INP_INFO_RUNLOCK(); 1495 return (stcb); 1496 } 1497 break; 1498 } 1499 #endif 1500 #ifdef INET6 1501 case AF_INET6: 1502 { 1503 struct sockaddr_in6 *sin6, 1504 *rsin6; 1505 1506 sin6 = (struct sockaddr_in6 *) 1507 &net->ro._l_addr; 1508 rsin6 = (struct sockaddr_in6 *)remote; 1509 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1510 rsin6)) { 1511 /* found it */ 1512 if (netp != NULL) { 1513 *netp = net; 1514 } 1515 if (locked_tcb == NULL) { 1516 SCTP_INP_DECR_REF(inp); 1517 } else if (locked_tcb != stcb) { 1518 SCTP_TCB_LOCK(locked_tcb); 1519 } 1520 if (locked_tcb) { 1521 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1522 } 1523 SCTP_INP_WUNLOCK(inp); 1524 SCTP_INP_INFO_RUNLOCK(); 1525 return (stcb); 1526 } 1527 break; 1528 } 1529 #endif 1530 default: 1531 /* TSNH */ 1532 break; 1533 } 1534 } 1535 SCTP_TCB_UNLOCK(stcb); 1536 } 1537 } 1538 null_return: 1539 /* clean up for returning null */ 1540 if (locked_tcb) { 1541 SCTP_TCB_LOCK(locked_tcb); 1542 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1543 } 1544 SCTP_INP_WUNLOCK(inp); 1545 SCTP_INP_INFO_RUNLOCK(); 1546 /* not found */ 1547 return (NULL); 1548 } 1549 1550 1551 /* 1552 * Find an association for a specific endpoint using the association id given 1553 * out in the COMM_UP notification 1554 */ 1555 struct sctp_tcb * 1556 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1557 { 1558 /* 1559 * Use my the assoc_id to find a endpoint 1560 */ 1561 struct sctpasochead *head; 1562 struct sctp_tcb *stcb; 1563 uint32_t id; 1564 1565 if (inp == NULL) { 1566 SCTP_PRINTF("TSNH ep_associd\n"); 1567 return (NULL); 1568 } 1569 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1570 SCTP_PRINTF("TSNH ep_associd0\n"); 1571 return (NULL); 1572 } 1573 id = (uint32_t)asoc_id; 1574 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1575 if (head == NULL) { 1576 /* invalid id TSNH */ 1577 SCTP_PRINTF("TSNH ep_associd1\n"); 1578 return (NULL); 1579 } 1580 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1581 if (stcb->asoc.assoc_id == id) { 1582 if (inp != stcb->sctp_ep) { 1583 /* 1584 * some other guy has the same id active (id 1585 * collision ??). 1586 */ 1587 SCTP_PRINTF("TSNH ep_associd2\n"); 1588 continue; 1589 } 1590 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1591 continue; 1592 } 1593 if (want_lock) { 1594 SCTP_TCB_LOCK(stcb); 1595 } 1596 return (stcb); 1597 } 1598 } 1599 return (NULL); 1600 } 1601 1602 1603 struct sctp_tcb * 1604 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1605 { 1606 struct sctp_tcb *stcb; 1607 1608 SCTP_INP_RLOCK(inp); 1609 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1610 SCTP_INP_RUNLOCK(inp); 1611 return (stcb); 1612 } 1613 1614 1615 /* 1616 * Endpoint probe expects that the INP_INFO is locked. 1617 */ 1618 static struct sctp_inpcb * 1619 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1620 uint16_t lport, uint32_t vrf_id) 1621 { 1622 struct sctp_inpcb *inp; 1623 struct sctp_laddr *laddr; 1624 #ifdef INET 1625 struct sockaddr_in *sin; 1626 #endif 1627 #ifdef INET6 1628 struct sockaddr_in6 *sin6; 1629 struct sockaddr_in6 *intf_addr6; 1630 #endif 1631 int fnd; 1632 1633 #ifdef INET 1634 sin = NULL; 1635 #endif 1636 #ifdef INET6 1637 sin6 = NULL; 1638 #endif 1639 switch (nam->sa_family) { 1640 #ifdef INET 1641 case AF_INET: 1642 sin = (struct sockaddr_in *)nam; 1643 break; 1644 #endif 1645 #ifdef INET6 1646 case AF_INET6: 1647 sin6 = (struct sockaddr_in6 *)nam; 1648 break; 1649 #endif 1650 default: 1651 /* unsupported family */ 1652 return (NULL); 1653 } 1654 1655 if (head == NULL) 1656 return (NULL); 1657 1658 LIST_FOREACH(inp, head, sctp_hash) { 1659 SCTP_INP_RLOCK(inp); 1660 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1661 SCTP_INP_RUNLOCK(inp); 1662 continue; 1663 } 1664 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1665 (inp->sctp_lport == lport)) { 1666 /* got it */ 1667 switch (nam->sa_family) { 1668 #ifdef INET 1669 case AF_INET: 1670 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1671 SCTP_IPV6_V6ONLY(inp)) { 1672 /* 1673 * IPv4 on a IPv6 socket with ONLY 1674 * IPv6 set 1675 */ 1676 SCTP_INP_RUNLOCK(inp); 1677 continue; 1678 } 1679 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1680 &sin->sin_addr) != 0) { 1681 SCTP_INP_RUNLOCK(inp); 1682 continue; 1683 } 1684 break; 1685 #endif 1686 #ifdef INET6 1687 case AF_INET6: 1688 /* 1689 * A V6 address and the endpoint is NOT 1690 * bound V6 1691 */ 1692 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1693 SCTP_INP_RUNLOCK(inp); 1694 continue; 1695 } 1696 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1697 &sin6->sin6_addr) != 0) { 1698 SCTP_INP_RUNLOCK(inp); 1699 continue; 1700 } 1701 break; 1702 #endif 1703 default: 1704 break; 1705 } 1706 /* does a VRF id match? */ 1707 fnd = 0; 1708 if (inp->def_vrf_id == vrf_id) 1709 fnd = 1; 1710 1711 SCTP_INP_RUNLOCK(inp); 1712 if (!fnd) 1713 continue; 1714 return (inp); 1715 } 1716 SCTP_INP_RUNLOCK(inp); 1717 } 1718 switch (nam->sa_family) { 1719 #ifdef INET 1720 case AF_INET: 1721 if (sin->sin_addr.s_addr == INADDR_ANY) { 1722 /* Can't hunt for one that has no address specified */ 1723 return (NULL); 1724 } 1725 break; 1726 #endif 1727 #ifdef INET6 1728 case AF_INET6: 1729 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1730 /* Can't hunt for one that has no address specified */ 1731 return (NULL); 1732 } 1733 break; 1734 #endif 1735 default: 1736 break; 1737 } 1738 /* 1739 * ok, not bound to all so see if we can find a EP bound to this 1740 * address. 1741 */ 1742 LIST_FOREACH(inp, head, sctp_hash) { 1743 SCTP_INP_RLOCK(inp); 1744 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1745 SCTP_INP_RUNLOCK(inp); 1746 continue; 1747 } 1748 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1749 SCTP_INP_RUNLOCK(inp); 1750 continue; 1751 } 1752 /* 1753 * Ok this could be a likely candidate, look at all of its 1754 * addresses 1755 */ 1756 if (inp->sctp_lport != lport) { 1757 SCTP_INP_RUNLOCK(inp); 1758 continue; 1759 } 1760 /* does a VRF id match? */ 1761 fnd = 0; 1762 if (inp->def_vrf_id == vrf_id) 1763 fnd = 1; 1764 1765 if (!fnd) { 1766 SCTP_INP_RUNLOCK(inp); 1767 continue; 1768 } 1769 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1770 if (laddr->ifa == NULL) { 1771 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1772 __func__); 1773 continue; 1774 } 1775 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1776 (void *)laddr->ifa); 1777 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1778 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1779 continue; 1780 } 1781 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1782 /* possible, see if it matches */ 1783 switch (nam->sa_family) { 1784 #ifdef INET 1785 case AF_INET: 1786 if (sin->sin_addr.s_addr == 1787 laddr->ifa->address.sin.sin_addr.s_addr) { 1788 SCTP_INP_RUNLOCK(inp); 1789 return (inp); 1790 } 1791 break; 1792 #endif 1793 #ifdef INET6 1794 case AF_INET6: 1795 intf_addr6 = &laddr->ifa->address.sin6; 1796 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1797 intf_addr6)) { 1798 SCTP_INP_RUNLOCK(inp); 1799 return (inp); 1800 } 1801 break; 1802 #endif 1803 } 1804 } 1805 } 1806 SCTP_INP_RUNLOCK(inp); 1807 } 1808 return (NULL); 1809 } 1810 1811 1812 static struct sctp_inpcb * 1813 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1814 { 1815 struct sctppcbhead *head; 1816 struct sctp_inpcb *t_inp; 1817 int fnd; 1818 1819 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1820 SCTP_BASE_INFO(hashmark))]; 1821 LIST_FOREACH(t_inp, head, sctp_hash) { 1822 if (t_inp->sctp_lport != lport) { 1823 continue; 1824 } 1825 /* is it in the VRF in question */ 1826 fnd = 0; 1827 if (t_inp->def_vrf_id == vrf_id) 1828 fnd = 1; 1829 if (!fnd) 1830 continue; 1831 1832 /* This one is in use. */ 1833 /* check the v6/v4 binding issue */ 1834 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1835 SCTP_IPV6_V6ONLY(t_inp)) { 1836 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1837 /* collision in V6 space */ 1838 return (t_inp); 1839 } else { 1840 /* inp is BOUND_V4 no conflict */ 1841 continue; 1842 } 1843 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1844 /* t_inp is bound v4 and v6, conflict always */ 1845 return (t_inp); 1846 } else { 1847 /* t_inp is bound only V4 */ 1848 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1849 SCTP_IPV6_V6ONLY(inp)) { 1850 /* no conflict */ 1851 continue; 1852 } 1853 /* else fall through to conflict */ 1854 } 1855 return (t_inp); 1856 } 1857 return (NULL); 1858 } 1859 1860 1861 int 1862 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1863 { 1864 /* For 1-2-1 with port reuse */ 1865 struct sctppcbhead *head; 1866 struct sctp_inpcb *tinp, *ninp; 1867 1868 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1869 /* only works with port reuse on */ 1870 return (-1); 1871 } 1872 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1873 return (0); 1874 } 1875 SCTP_INP_RUNLOCK(inp); 1876 SCTP_INP_INFO_WLOCK(); 1877 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1878 SCTP_BASE_INFO(hashmark))]; 1879 /* Kick out all non-listeners to the TCP hash */ 1880 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1881 if (tinp->sctp_lport != inp->sctp_lport) { 1882 continue; 1883 } 1884 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1885 continue; 1886 } 1887 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1888 continue; 1889 } 1890 if (tinp->sctp_socket->so_qlimit) { 1891 continue; 1892 } 1893 SCTP_INP_WLOCK(tinp); 1894 LIST_REMOVE(tinp, sctp_hash); 1895 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1896 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1897 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1898 SCTP_INP_WUNLOCK(tinp); 1899 } 1900 SCTP_INP_WLOCK(inp); 1901 /* Pull from where he was */ 1902 LIST_REMOVE(inp, sctp_hash); 1903 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1904 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1905 LIST_INSERT_HEAD(head, inp, sctp_hash); 1906 SCTP_INP_WUNLOCK(inp); 1907 SCTP_INP_RLOCK(inp); 1908 SCTP_INP_INFO_WUNLOCK(); 1909 return (0); 1910 } 1911 1912 1913 struct sctp_inpcb * 1914 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1915 uint32_t vrf_id) 1916 { 1917 /* 1918 * First we check the hash table to see if someone has this port 1919 * bound with just the port. 1920 */ 1921 struct sctp_inpcb *inp; 1922 struct sctppcbhead *head; 1923 int lport; 1924 unsigned int i; 1925 #ifdef INET 1926 struct sockaddr_in *sin; 1927 #endif 1928 #ifdef INET6 1929 struct sockaddr_in6 *sin6; 1930 #endif 1931 1932 switch (nam->sa_family) { 1933 #ifdef INET 1934 case AF_INET: 1935 sin = (struct sockaddr_in *)nam; 1936 lport = sin->sin_port; 1937 break; 1938 #endif 1939 #ifdef INET6 1940 case AF_INET6: 1941 sin6 = (struct sockaddr_in6 *)nam; 1942 lport = sin6->sin6_port; 1943 break; 1944 #endif 1945 default: 1946 return (NULL); 1947 } 1948 /* 1949 * I could cheat here and just cast to one of the types but we will 1950 * do it right. It also provides the check against an Unsupported 1951 * type too. 1952 */ 1953 /* Find the head of the ALLADDR chain */ 1954 if (have_lock == 0) { 1955 SCTP_INP_INFO_RLOCK(); 1956 } 1957 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1958 SCTP_BASE_INFO(hashmark))]; 1959 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1960 1961 /* 1962 * If the TCP model exists it could be that the main listening 1963 * endpoint is gone but there still exists a connected socket for 1964 * this guy. If so we can return the first one that we find. This 1965 * may NOT be the correct one so the caller should be wary on the 1966 * returned INP. Currently the only caller that sets find_tcp_pool 1967 * is in bindx where we are verifying that a user CAN bind the 1968 * address. He either has bound it already, or someone else has, or 1969 * its open to bind, so this is good enough. 1970 */ 1971 if (inp == NULL && find_tcp_pool) { 1972 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1973 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1974 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1975 if (inp) { 1976 break; 1977 } 1978 } 1979 } 1980 if (inp) { 1981 SCTP_INP_INCR_REF(inp); 1982 } 1983 if (have_lock == 0) { 1984 SCTP_INP_INFO_RUNLOCK(); 1985 } 1986 return (inp); 1987 } 1988 1989 1990 /* 1991 * Find an association for an endpoint with the pointer to whom you want to 1992 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1993 * need to change the *to to some other struct like a mbuf... 1994 */ 1995 struct sctp_tcb * 1996 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1997 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1998 uint32_t vrf_id) 1999 { 2000 struct sctp_inpcb *inp = NULL; 2001 struct sctp_tcb *stcb; 2002 2003 SCTP_INP_INFO_RLOCK(); 2004 if (find_tcp_pool) { 2005 if (inp_p != NULL) { 2006 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2007 vrf_id); 2008 } else { 2009 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2010 vrf_id); 2011 } 2012 if (stcb != NULL) { 2013 SCTP_INP_INFO_RUNLOCK(); 2014 return (stcb); 2015 } 2016 } 2017 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2018 if (inp_p != NULL) { 2019 *inp_p = inp; 2020 } 2021 SCTP_INP_INFO_RUNLOCK(); 2022 if (inp == NULL) { 2023 return (NULL); 2024 } 2025 /* 2026 * ok, we have an endpoint, now lets find the assoc for it (if any) 2027 * we now place the source address or from in the to of the find 2028 * endpoint call. Since in reality this chain is used from the 2029 * inbound packet side. 2030 */ 2031 if (inp_p != NULL) { 2032 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2033 NULL); 2034 } else { 2035 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2036 NULL); 2037 } 2038 return (stcb); 2039 } 2040 2041 2042 /* 2043 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2044 * find all addresses that the sender has specified in any address list. Each 2045 * address will be used to lookup the TCB and see if one exits. 2046 */ 2047 static struct sctp_tcb * 2048 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2049 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2050 struct sockaddr *dst) 2051 { 2052 struct sctp_paramhdr *phdr, param_buf; 2053 #if defined(INET) || defined(INET6) 2054 struct sctp_tcb *stcb; 2055 uint16_t ptype; 2056 #endif 2057 uint16_t plen; 2058 #ifdef INET 2059 struct sockaddr_in sin4; 2060 #endif 2061 #ifdef INET6 2062 struct sockaddr_in6 sin6; 2063 #endif 2064 2065 #ifdef INET 2066 memset(&sin4, 0, sizeof(sin4)); 2067 sin4.sin_len = sizeof(sin4); 2068 sin4.sin_family = AF_INET; 2069 sin4.sin_port = sh->src_port; 2070 #endif 2071 #ifdef INET6 2072 memset(&sin6, 0, sizeof(sin6)); 2073 sin6.sin6_len = sizeof(sin6); 2074 sin6.sin6_family = AF_INET6; 2075 sin6.sin6_port = sh->src_port; 2076 #endif 2077 2078 offset += sizeof(struct sctp_init_chunk); 2079 2080 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2081 while (phdr != NULL) { 2082 /* now we must see if we want the parameter */ 2083 #if defined(INET) || defined(INET6) 2084 ptype = ntohs(phdr->param_type); 2085 #endif 2086 plen = ntohs(phdr->param_length); 2087 if (plen == 0) { 2088 break; 2089 } 2090 #ifdef INET 2091 if (ptype == SCTP_IPV4_ADDRESS && 2092 plen == sizeof(struct sctp_ipv4addr_param)) { 2093 /* Get the rest of the address */ 2094 struct sctp_ipv4addr_param ip4_param, *p4; 2095 2096 phdr = sctp_get_next_param(m, offset, 2097 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2098 if (phdr == NULL) { 2099 return (NULL); 2100 } 2101 p4 = (struct sctp_ipv4addr_param *)phdr; 2102 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2103 /* look it up */ 2104 stcb = sctp_findassociation_ep_addr(inp_p, 2105 (struct sockaddr *)&sin4, netp, dst, NULL); 2106 if (stcb != NULL) { 2107 return (stcb); 2108 } 2109 } 2110 #endif 2111 #ifdef INET6 2112 if (ptype == SCTP_IPV6_ADDRESS && 2113 plen == sizeof(struct sctp_ipv6addr_param)) { 2114 /* Get the rest of the address */ 2115 struct sctp_ipv6addr_param ip6_param, *p6; 2116 2117 phdr = sctp_get_next_param(m, offset, 2118 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2119 if (phdr == NULL) { 2120 return (NULL); 2121 } 2122 p6 = (struct sctp_ipv6addr_param *)phdr; 2123 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2124 /* look it up */ 2125 stcb = sctp_findassociation_ep_addr(inp_p, 2126 (struct sockaddr *)&sin6, netp, dst, NULL); 2127 if (stcb != NULL) { 2128 return (stcb); 2129 } 2130 } 2131 #endif 2132 offset += SCTP_SIZE32(plen); 2133 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2134 sizeof(param_buf)); 2135 } 2136 return (NULL); 2137 } 2138 2139 static struct sctp_tcb * 2140 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2141 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2142 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2143 { 2144 /* 2145 * Use my vtag to hash. If we find it we then verify the source addr 2146 * is in the assoc. If all goes well we save a bit on rec of a 2147 * packet. 2148 */ 2149 struct sctpasochead *head; 2150 struct sctp_nets *net; 2151 struct sctp_tcb *stcb; 2152 2153 SCTP_INP_INFO_RLOCK(); 2154 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2155 SCTP_BASE_INFO(hashasocmark))]; 2156 LIST_FOREACH(stcb, head, sctp_asocs) { 2157 SCTP_INP_RLOCK(stcb->sctp_ep); 2158 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2159 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2160 continue; 2161 } 2162 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2163 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2164 continue; 2165 } 2166 SCTP_TCB_LOCK(stcb); 2167 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2168 if (stcb->asoc.my_vtag == vtag) { 2169 /* candidate */ 2170 if (stcb->rport != rport) { 2171 SCTP_TCB_UNLOCK(stcb); 2172 continue; 2173 } 2174 if (stcb->sctp_ep->sctp_lport != lport) { 2175 SCTP_TCB_UNLOCK(stcb); 2176 continue; 2177 } 2178 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2179 SCTP_TCB_UNLOCK(stcb); 2180 continue; 2181 } 2182 /* RRS:Need toaddr check here */ 2183 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2184 /* Endpoint does not own this address */ 2185 SCTP_TCB_UNLOCK(stcb); 2186 continue; 2187 } 2188 if (remote_tag) { 2189 /* 2190 * If we have both vtags that's all we match 2191 * on 2192 */ 2193 if (stcb->asoc.peer_vtag == remote_tag) { 2194 /* 2195 * If both tags match we consider it 2196 * conclusive and check NO 2197 * source/destination addresses 2198 */ 2199 goto conclusive; 2200 } 2201 } 2202 if (skip_src_check) { 2203 conclusive: 2204 if (from) { 2205 *netp = sctp_findnet(stcb, from); 2206 } else { 2207 *netp = NULL; /* unknown */ 2208 } 2209 if (inp_p) 2210 *inp_p = stcb->sctp_ep; 2211 SCTP_INP_INFO_RUNLOCK(); 2212 return (stcb); 2213 } 2214 net = sctp_findnet(stcb, from); 2215 if (net) { 2216 /* yep its him. */ 2217 *netp = net; 2218 SCTP_STAT_INCR(sctps_vtagexpress); 2219 *inp_p = stcb->sctp_ep; 2220 SCTP_INP_INFO_RUNLOCK(); 2221 return (stcb); 2222 } else { 2223 /* 2224 * not him, this should only happen in rare 2225 * cases so I peg it. 2226 */ 2227 SCTP_STAT_INCR(sctps_vtagbogus); 2228 } 2229 } 2230 SCTP_TCB_UNLOCK(stcb); 2231 } 2232 SCTP_INP_INFO_RUNLOCK(); 2233 return (NULL); 2234 } 2235 2236 2237 /* 2238 * Find an association with the pointer to the inbound IP packet. This can be 2239 * a IPv4 or IPv6 packet. 2240 */ 2241 struct sctp_tcb * 2242 sctp_findassociation_addr(struct mbuf *m, int offset, 2243 struct sockaddr *src, struct sockaddr *dst, 2244 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2245 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2246 { 2247 struct sctp_tcb *stcb; 2248 struct sctp_inpcb *inp; 2249 2250 if (sh->v_tag) { 2251 /* we only go down this path if vtag is non-zero */ 2252 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2253 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2254 if (stcb) { 2255 return (stcb); 2256 } 2257 } 2258 2259 if (inp_p) { 2260 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2261 1, vrf_id); 2262 inp = *inp_p; 2263 } else { 2264 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2265 1, vrf_id); 2266 } 2267 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2268 if (stcb == NULL && inp) { 2269 /* Found a EP but not this address */ 2270 if ((ch->chunk_type == SCTP_INITIATION) || 2271 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2272 /*- 2273 * special hook, we do NOT return linp or an 2274 * association that is linked to an existing 2275 * association that is under the TCP pool (i.e. no 2276 * listener exists). The endpoint finding routine 2277 * will always find a listener before examining the 2278 * TCP pool. 2279 */ 2280 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2281 if (inp_p) { 2282 *inp_p = NULL; 2283 } 2284 return (NULL); 2285 } 2286 stcb = sctp_findassociation_special_addr(m, 2287 offset, sh, &inp, netp, dst); 2288 if (inp_p != NULL) { 2289 *inp_p = inp; 2290 } 2291 } 2292 } 2293 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2294 return (stcb); 2295 } 2296 2297 /* 2298 * lookup an association by an ASCONF lookup address. 2299 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2300 */ 2301 struct sctp_tcb * 2302 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2303 struct sockaddr *dst, struct sctphdr *sh, 2304 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2305 { 2306 struct sctp_tcb *stcb; 2307 union sctp_sockstore remote_store; 2308 struct sctp_paramhdr param_buf, *phdr; 2309 int ptype; 2310 int zero_address = 0; 2311 #ifdef INET 2312 struct sockaddr_in *sin; 2313 #endif 2314 #ifdef INET6 2315 struct sockaddr_in6 *sin6; 2316 #endif 2317 2318 memset(&remote_store, 0, sizeof(remote_store)); 2319 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2320 ¶m_buf, sizeof(struct sctp_paramhdr)); 2321 if (phdr == NULL) { 2322 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2323 __func__); 2324 return NULL; 2325 } 2326 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2327 /* get the correlation address */ 2328 switch (ptype) { 2329 #ifdef INET6 2330 case SCTP_IPV6_ADDRESS: 2331 { 2332 /* ipv6 address param */ 2333 struct sctp_ipv6addr_param *p6, p6_buf; 2334 2335 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2336 return NULL; 2337 } 2338 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2339 offset + sizeof(struct sctp_asconf_chunk), 2340 &p6_buf.ph, sizeof(p6_buf)); 2341 if (p6 == NULL) { 2342 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2343 __func__); 2344 return (NULL); 2345 } 2346 sin6 = &remote_store.sin6; 2347 sin6->sin6_family = AF_INET6; 2348 sin6->sin6_len = sizeof(*sin6); 2349 sin6->sin6_port = sh->src_port; 2350 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2351 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2352 zero_address = 1; 2353 break; 2354 } 2355 #endif 2356 #ifdef INET 2357 case SCTP_IPV4_ADDRESS: 2358 { 2359 /* ipv4 address param */ 2360 struct sctp_ipv4addr_param *p4, p4_buf; 2361 2362 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2363 return NULL; 2364 } 2365 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2366 offset + sizeof(struct sctp_asconf_chunk), 2367 &p4_buf.ph, sizeof(p4_buf)); 2368 if (p4 == NULL) { 2369 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2370 __func__); 2371 return (NULL); 2372 } 2373 sin = &remote_store.sin; 2374 sin->sin_family = AF_INET; 2375 sin->sin_len = sizeof(*sin); 2376 sin->sin_port = sh->src_port; 2377 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2378 if (sin->sin_addr.s_addr == INADDR_ANY) 2379 zero_address = 1; 2380 break; 2381 } 2382 #endif 2383 default: 2384 /* invalid address param type */ 2385 return NULL; 2386 } 2387 2388 if (zero_address) { 2389 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2390 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2391 if (stcb != NULL) { 2392 SCTP_INP_DECR_REF(*inp_p); 2393 } 2394 } else { 2395 stcb = sctp_findassociation_ep_addr(inp_p, 2396 &remote_store.sa, netp, 2397 dst, NULL); 2398 } 2399 return (stcb); 2400 } 2401 2402 2403 /* 2404 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2405 * addresses. This way if we don't get a bind we by default pick a ephemeral 2406 * port with all addresses bound. 2407 */ 2408 int 2409 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2410 { 2411 /* 2412 * we get called when a new endpoint starts up. We need to allocate 2413 * the sctp_inpcb structure from the zone and init it. Mark it as 2414 * unbound and find a port that we can use as an ephemeral with 2415 * INADDR_ANY. If the user binds later no problem we can then add in 2416 * the specific addresses. And setup the default parameters for the 2417 * EP. 2418 */ 2419 int i, error; 2420 struct sctp_inpcb *inp; 2421 struct sctp_pcb *m; 2422 struct timeval time; 2423 sctp_sharedkey_t *null_key; 2424 2425 error = 0; 2426 2427 SCTP_INP_INFO_WLOCK(); 2428 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2429 if (inp == NULL) { 2430 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2431 SCTP_INP_INFO_WUNLOCK(); 2432 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2433 return (ENOBUFS); 2434 } 2435 /* zap it */ 2436 memset(inp, 0, sizeof(*inp)); 2437 2438 /* bump generations */ 2439 /* setup socket pointers */ 2440 inp->sctp_socket = so; 2441 inp->ip_inp.inp.inp_socket = so; 2442 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2443 #ifdef INET6 2444 if (INP_SOCKAF(so) == AF_INET6) { 2445 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2446 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2447 } 2448 if (MODULE_GLOBAL(ip6_v6only)) { 2449 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2450 } 2451 } 2452 #endif 2453 inp->sctp_associd_counter = 1; 2454 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2455 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2456 inp->max_cwnd = 0; 2457 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2458 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2459 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2460 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2461 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2462 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2463 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2464 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2465 inp->idata_supported = 0; 2466 2467 inp->fibnum = so->so_fibnum; 2468 /* init the small hash table we use to track asocid <-> tcb */ 2469 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2470 if (inp->sctp_asocidhash == NULL) { 2471 crfree(inp->ip_inp.inp.inp_cred); 2472 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2473 SCTP_INP_INFO_WUNLOCK(); 2474 return (ENOBUFS); 2475 } 2476 SCTP_INCR_EP_COUNT(); 2477 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2478 SCTP_INP_INFO_WUNLOCK(); 2479 2480 so->so_pcb = (caddr_t)inp; 2481 2482 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2483 /* UDP style socket */ 2484 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2485 SCTP_PCB_FLAGS_UNBOUND); 2486 /* Be sure it is NON-BLOCKING IO for UDP */ 2487 /* SCTP_SET_SO_NBIO(so); */ 2488 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2489 /* TCP style socket */ 2490 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2491 SCTP_PCB_FLAGS_UNBOUND); 2492 /* Be sure we have blocking IO by default */ 2493 SOCK_LOCK(so); 2494 SCTP_CLEAR_SO_NBIO(so); 2495 SOCK_UNLOCK(so); 2496 } else { 2497 /* 2498 * unsupported socket type (RAW, etc)- in case we missed it 2499 * in protosw 2500 */ 2501 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2502 so->so_pcb = NULL; 2503 crfree(inp->ip_inp.inp.inp_cred); 2504 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2505 return (EOPNOTSUPP); 2506 } 2507 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2508 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2509 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2510 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2511 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2512 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2513 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2514 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2515 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2516 } 2517 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2518 &inp->sctp_hashmark); 2519 if (inp->sctp_tcbhash == NULL) { 2520 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2521 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2522 so->so_pcb = NULL; 2523 crfree(inp->ip_inp.inp.inp_cred); 2524 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2525 return (ENOBUFS); 2526 } 2527 inp->def_vrf_id = vrf_id; 2528 2529 SCTP_INP_INFO_WLOCK(); 2530 SCTP_INP_LOCK_INIT(inp); 2531 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2532 SCTP_INP_READ_INIT(inp); 2533 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2534 /* lock the new ep */ 2535 SCTP_INP_WLOCK(inp); 2536 2537 /* add it to the info area */ 2538 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2539 SCTP_INP_INFO_WUNLOCK(); 2540 2541 TAILQ_INIT(&inp->read_queue); 2542 LIST_INIT(&inp->sctp_addr_list); 2543 2544 LIST_INIT(&inp->sctp_asoc_list); 2545 2546 #ifdef SCTP_TRACK_FREED_ASOCS 2547 /* TEMP CODE */ 2548 LIST_INIT(&inp->sctp_asoc_free_list); 2549 #endif 2550 /* Init the timer structure for signature change */ 2551 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2552 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2553 2554 /* now init the actual endpoint default data */ 2555 m = &inp->sctp_ep; 2556 2557 /* setup the base timeout information */ 2558 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2559 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2560 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2561 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2562 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2563 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2564 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2565 /* all max/min max are in ms */ 2566 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2567 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2568 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2569 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2570 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2571 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2572 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2573 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2574 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2575 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2576 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2577 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2578 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2579 2580 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2581 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2582 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2583 /* number of streams to pre-open on a association */ 2584 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2585 2586 m->default_mtu = 0; 2587 /* Add adaptation cookie */ 2588 m->adaptation_layer_indicator = 0; 2589 m->adaptation_layer_indicator_provided = 0; 2590 2591 /* seed random number generator */ 2592 m->random_counter = 1; 2593 m->store_at = SCTP_SIGNATURE_SIZE; 2594 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2595 sctp_fill_random_store(m); 2596 2597 /* Minimum cookie size */ 2598 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2599 sizeof(struct sctp_state_cookie); 2600 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2601 2602 /* Setup the initial secret */ 2603 (void)SCTP_GETTIME_TIMEVAL(&time); 2604 m->time_of_secret_change = time.tv_sec; 2605 2606 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2607 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2608 } 2609 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2610 2611 /* How long is a cookie good for ? */ 2612 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2613 /* 2614 * Initialize authentication parameters 2615 */ 2616 m->local_hmacs = sctp_default_supported_hmaclist(); 2617 m->local_auth_chunks = sctp_alloc_chunklist(); 2618 if (inp->asconf_supported) { 2619 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2620 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2621 } 2622 m->default_dscp = 0; 2623 #ifdef INET6 2624 m->default_flowlabel = 0; 2625 #endif 2626 m->port = 0; /* encapsulation disabled by default */ 2627 LIST_INIT(&m->shared_keys); 2628 /* add default NULL key as key id 0 */ 2629 null_key = sctp_alloc_sharedkey(); 2630 sctp_insert_sharedkey(&m->shared_keys, null_key); 2631 SCTP_INP_WUNLOCK(inp); 2632 #ifdef SCTP_LOG_CLOSING 2633 sctp_log_closing(inp, NULL, 12); 2634 #endif 2635 return (error); 2636 } 2637 2638 2639 void 2640 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2641 struct sctp_tcb *stcb) 2642 { 2643 struct sctp_nets *net; 2644 uint16_t lport, rport; 2645 struct sctppcbhead *head; 2646 struct sctp_laddr *laddr, *oladdr; 2647 2648 atomic_add_int(&stcb->asoc.refcnt, 1); 2649 SCTP_TCB_UNLOCK(stcb); 2650 SCTP_INP_INFO_WLOCK(); 2651 SCTP_INP_WLOCK(old_inp); 2652 SCTP_INP_WLOCK(new_inp); 2653 SCTP_TCB_LOCK(stcb); 2654 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2655 2656 new_inp->sctp_ep.time_of_secret_change = 2657 old_inp->sctp_ep.time_of_secret_change; 2658 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2659 sizeof(old_inp->sctp_ep.secret_key)); 2660 new_inp->sctp_ep.current_secret_number = 2661 old_inp->sctp_ep.current_secret_number; 2662 new_inp->sctp_ep.last_secret_number = 2663 old_inp->sctp_ep.last_secret_number; 2664 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2665 2666 /* make it so new data pours into the new socket */ 2667 stcb->sctp_socket = new_inp->sctp_socket; 2668 stcb->sctp_ep = new_inp; 2669 2670 /* Copy the port across */ 2671 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2672 rport = stcb->rport; 2673 /* Pull the tcb from the old association */ 2674 LIST_REMOVE(stcb, sctp_tcbhash); 2675 LIST_REMOVE(stcb, sctp_tcblist); 2676 if (stcb->asoc.in_asocid_hash) { 2677 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2678 } 2679 /* Now insert the new_inp into the TCP connected hash */ 2680 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2681 2682 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2683 /* Its safe to access */ 2684 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2685 2686 /* Now move the tcb into the endpoint list */ 2687 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2688 /* 2689 * Question, do we even need to worry about the ep-hash since we 2690 * only have one connection? Probably not :> so lets get rid of it 2691 * and not suck up any kernel memory in that. 2692 */ 2693 if (stcb->asoc.in_asocid_hash) { 2694 struct sctpasochead *lhd; 2695 2696 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2697 new_inp->hashasocidmark)]; 2698 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2699 } 2700 /* Ok. Let's restart timer. */ 2701 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2702 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2703 stcb, net); 2704 } 2705 2706 SCTP_INP_INFO_WUNLOCK(); 2707 if (new_inp->sctp_tcbhash != NULL) { 2708 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2709 new_inp->sctp_tcbhash = NULL; 2710 } 2711 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2712 /* Subset bound, so copy in the laddr list from the old_inp */ 2713 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2714 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2715 if (laddr == NULL) { 2716 /* 2717 * Gak, what can we do? This assoc is really 2718 * HOSED. We probably should send an abort 2719 * here. 2720 */ 2721 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2722 continue; 2723 } 2724 SCTP_INCR_LADDR_COUNT(); 2725 memset(laddr, 0, sizeof(*laddr)); 2726 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2727 laddr->ifa = oladdr->ifa; 2728 atomic_add_int(&laddr->ifa->refcount, 1); 2729 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2730 sctp_nxt_addr); 2731 new_inp->laddr_count++; 2732 if (oladdr == stcb->asoc.last_used_address) { 2733 stcb->asoc.last_used_address = laddr; 2734 } 2735 } 2736 } 2737 /* 2738 * Now any running timers need to be adjusted since we really don't 2739 * care if they are running or not just blast in the new_inp into 2740 * all of them. 2741 */ 2742 2743 stcb->asoc.dack_timer.ep = (void *)new_inp; 2744 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2745 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2746 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2747 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2748 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2749 /* now what about the nets? */ 2750 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2751 net->pmtu_timer.ep = (void *)new_inp; 2752 net->hb_timer.ep = (void *)new_inp; 2753 net->rxt_timer.ep = (void *)new_inp; 2754 } 2755 SCTP_INP_WUNLOCK(new_inp); 2756 SCTP_INP_WUNLOCK(old_inp); 2757 } 2758 2759 /* 2760 * insert an laddr entry with the given ifa for the desired list 2761 */ 2762 static int 2763 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2764 { 2765 struct sctp_laddr *laddr; 2766 2767 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2768 if (laddr == NULL) { 2769 /* out of memory? */ 2770 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2771 return (EINVAL); 2772 } 2773 SCTP_INCR_LADDR_COUNT(); 2774 memset(laddr, 0, sizeof(*laddr)); 2775 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2776 laddr->ifa = ifa; 2777 laddr->action = act; 2778 atomic_add_int(&ifa->refcount, 1); 2779 /* insert it */ 2780 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2781 2782 return (0); 2783 } 2784 2785 /* 2786 * Remove an laddr entry from the local address list (on an assoc) 2787 */ 2788 static void 2789 sctp_remove_laddr(struct sctp_laddr *laddr) 2790 { 2791 2792 /* remove from the list */ 2793 LIST_REMOVE(laddr, sctp_nxt_addr); 2794 sctp_free_ifa(laddr->ifa); 2795 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2796 SCTP_DECR_LADDR_COUNT(); 2797 } 2798 2799 2800 2801 /* sctp_ifap is used to bypass normal local address validation checks */ 2802 int 2803 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2804 struct sctp_ifa *sctp_ifap, struct thread *p) 2805 { 2806 /* bind a ep to a socket address */ 2807 struct sctppcbhead *head; 2808 struct sctp_inpcb *inp, *inp_tmp; 2809 struct inpcb *ip_inp; 2810 int port_reuse_active = 0; 2811 int bindall; 2812 uint16_t lport; 2813 int error; 2814 uint32_t vrf_id; 2815 2816 lport = 0; 2817 bindall = 1; 2818 inp = (struct sctp_inpcb *)so->so_pcb; 2819 ip_inp = (struct inpcb *)so->so_pcb; 2820 #ifdef SCTP_DEBUG 2821 if (addr) { 2822 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2823 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2824 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2825 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2826 } 2827 #endif 2828 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2829 /* already did a bind, subsequent binds NOT allowed ! */ 2830 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2831 return (EINVAL); 2832 } 2833 #ifdef INVARIANTS 2834 if (p == NULL) 2835 panic("null proc/thread"); 2836 #endif 2837 if (addr != NULL) { 2838 switch (addr->sa_family) { 2839 #ifdef INET 2840 case AF_INET: 2841 { 2842 struct sockaddr_in *sin; 2843 2844 /* IPV6_V6ONLY socket? */ 2845 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2846 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2847 return (EINVAL); 2848 } 2849 if (addr->sa_len != sizeof(*sin)) { 2850 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2851 return (EINVAL); 2852 } 2853 2854 sin = (struct sockaddr_in *)addr; 2855 lport = sin->sin_port; 2856 /* 2857 * For LOOPBACK the prison_local_ip4() call 2858 * will transmute the ip address to the 2859 * proper value. 2860 */ 2861 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2862 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2863 return (error); 2864 } 2865 if (sin->sin_addr.s_addr != INADDR_ANY) { 2866 bindall = 0; 2867 } 2868 break; 2869 } 2870 #endif 2871 #ifdef INET6 2872 case AF_INET6: 2873 { 2874 /* 2875 * Only for pure IPv6 Address. (No IPv4 2876 * Mapped!) 2877 */ 2878 struct sockaddr_in6 *sin6; 2879 2880 sin6 = (struct sockaddr_in6 *)addr; 2881 2882 if (addr->sa_len != sizeof(*sin6)) { 2883 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2884 return (EINVAL); 2885 } 2886 lport = sin6->sin6_port; 2887 /* 2888 * For LOOPBACK the prison_local_ip6() call 2889 * will transmute the ipv6 address to the 2890 * proper value. 2891 */ 2892 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2893 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2894 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2895 return (error); 2896 } 2897 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2898 bindall = 0; 2899 /* KAME hack: embed scopeid */ 2900 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2901 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2902 return (EINVAL); 2903 } 2904 } 2905 /* this must be cleared for ifa_ifwithaddr() */ 2906 sin6->sin6_scope_id = 0; 2907 break; 2908 } 2909 #endif 2910 default: 2911 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2912 return (EAFNOSUPPORT); 2913 } 2914 } 2915 SCTP_INP_INFO_WLOCK(); 2916 SCTP_INP_WLOCK(inp); 2917 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2918 vrf_id = inp->def_vrf_id; 2919 2920 /* increase our count due to the unlock we do */ 2921 SCTP_INP_INCR_REF(inp); 2922 if (lport) { 2923 /* 2924 * Did the caller specify a port? if so we must see if an ep 2925 * already has this one bound. 2926 */ 2927 /* got to be root to get at low ports */ 2928 if (ntohs(lport) < IPPORT_RESERVED) { 2929 if ((p != NULL) && ((error = 2930 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2931 ) != 0)) { 2932 SCTP_INP_DECR_REF(inp); 2933 SCTP_INP_WUNLOCK(inp); 2934 SCTP_INP_INFO_WUNLOCK(); 2935 return (error); 2936 } 2937 } 2938 SCTP_INP_WUNLOCK(inp); 2939 if (bindall) { 2940 vrf_id = inp->def_vrf_id; 2941 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2942 if (inp_tmp != NULL) { 2943 /* 2944 * lock guy returned and lower count note 2945 * that we are not bound so inp_tmp should 2946 * NEVER be inp. And it is this inp 2947 * (inp_tmp) that gets the reference bump, 2948 * so we must lower it. 2949 */ 2950 SCTP_INP_DECR_REF(inp_tmp); 2951 /* unlock info */ 2952 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2953 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2954 /* 2955 * Ok, must be one-2-one and 2956 * allowing port re-use 2957 */ 2958 port_reuse_active = 1; 2959 goto continue_anyway; 2960 } 2961 SCTP_INP_DECR_REF(inp); 2962 SCTP_INP_INFO_WUNLOCK(); 2963 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2964 return (EADDRINUSE); 2965 } 2966 } else { 2967 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2968 if (inp_tmp != NULL) { 2969 /* 2970 * lock guy returned and lower count note 2971 * that we are not bound so inp_tmp should 2972 * NEVER be inp. And it is this inp 2973 * (inp_tmp) that gets the reference bump, 2974 * so we must lower it. 2975 */ 2976 SCTP_INP_DECR_REF(inp_tmp); 2977 /* unlock info */ 2978 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2979 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2980 /* 2981 * Ok, must be one-2-one and 2982 * allowing port re-use 2983 */ 2984 port_reuse_active = 1; 2985 goto continue_anyway; 2986 } 2987 SCTP_INP_DECR_REF(inp); 2988 SCTP_INP_INFO_WUNLOCK(); 2989 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2990 return (EADDRINUSE); 2991 } 2992 } 2993 continue_anyway: 2994 SCTP_INP_WLOCK(inp); 2995 if (bindall) { 2996 /* verify that no lport is not used by a singleton */ 2997 if ((port_reuse_active == 0) && 2998 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2999 /* Sorry someone already has this one bound */ 3000 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3001 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3002 port_reuse_active = 1; 3003 } else { 3004 SCTP_INP_DECR_REF(inp); 3005 SCTP_INP_WUNLOCK(inp); 3006 SCTP_INP_INFO_WUNLOCK(); 3007 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3008 return (EADDRINUSE); 3009 } 3010 } 3011 } 3012 } else { 3013 uint16_t first, last, candidate; 3014 uint16_t count; 3015 int done; 3016 3017 if (ip_inp->inp_flags & INP_HIGHPORT) { 3018 first = MODULE_GLOBAL(ipport_hifirstauto); 3019 last = MODULE_GLOBAL(ipport_hilastauto); 3020 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3021 if (p && (error = 3022 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3023 )) { 3024 SCTP_INP_DECR_REF(inp); 3025 SCTP_INP_WUNLOCK(inp); 3026 SCTP_INP_INFO_WUNLOCK(); 3027 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3028 return (error); 3029 } 3030 first = MODULE_GLOBAL(ipport_lowfirstauto); 3031 last = MODULE_GLOBAL(ipport_lowlastauto); 3032 } else { 3033 first = MODULE_GLOBAL(ipport_firstauto); 3034 last = MODULE_GLOBAL(ipport_lastauto); 3035 } 3036 if (first > last) { 3037 uint16_t temp; 3038 3039 temp = first; 3040 first = last; 3041 last = temp; 3042 } 3043 count = last - first + 1; /* number of candidates */ 3044 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3045 3046 done = 0; 3047 while (!done) { 3048 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3049 done = 1; 3050 } 3051 if (!done) { 3052 if (--count == 0) { 3053 SCTP_INP_DECR_REF(inp); 3054 SCTP_INP_WUNLOCK(inp); 3055 SCTP_INP_INFO_WUNLOCK(); 3056 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3057 return (EADDRINUSE); 3058 } 3059 if (candidate == last) 3060 candidate = first; 3061 else 3062 candidate = candidate + 1; 3063 } 3064 } 3065 lport = htons(candidate); 3066 } 3067 SCTP_INP_DECR_REF(inp); 3068 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3069 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3070 /* 3071 * this really should not happen. The guy did a non-blocking 3072 * bind and then did a close at the same time. 3073 */ 3074 SCTP_INP_WUNLOCK(inp); 3075 SCTP_INP_INFO_WUNLOCK(); 3076 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3077 return (EINVAL); 3078 } 3079 /* ok we look clear to give out this port, so lets setup the binding */ 3080 if (bindall) { 3081 /* binding to all addresses, so just set in the proper flags */ 3082 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3083 /* set the automatic addr changes from kernel flag */ 3084 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3085 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3086 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3087 } else { 3088 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3089 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3090 } 3091 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3092 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3093 } else { 3094 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3095 } 3096 /* 3097 * set the automatic mobility_base from kernel flag (by 3098 * micchie) 3099 */ 3100 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3101 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3102 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3103 } else { 3104 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3106 } 3107 /* 3108 * set the automatic mobility_fasthandoff from kernel flag 3109 * (by micchie) 3110 */ 3111 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3112 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3113 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3114 } else { 3115 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3116 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3117 } 3118 } else { 3119 /* 3120 * bind specific, make sure flags is off and add a new 3121 * address structure to the sctp_addr_list inside the ep 3122 * structure. 3123 * 3124 * We will need to allocate one and insert it at the head. 3125 * The socketopt call can just insert new addresses in there 3126 * as well. It will also have to do the embed scope kame 3127 * hack too (before adding). 3128 */ 3129 struct sctp_ifa *ifa; 3130 union sctp_sockstore store; 3131 3132 memset(&store, 0, sizeof(store)); 3133 switch (addr->sa_family) { 3134 #ifdef INET 3135 case AF_INET: 3136 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3137 store.sin.sin_port = 0; 3138 break; 3139 #endif 3140 #ifdef INET6 3141 case AF_INET6: 3142 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3143 store.sin6.sin6_port = 0; 3144 break; 3145 #endif 3146 default: 3147 break; 3148 } 3149 /* 3150 * first find the interface with the bound address need to 3151 * zero out the port to find the address! yuck! can't do 3152 * this earlier since need port for sctp_pcb_findep() 3153 */ 3154 if (sctp_ifap != NULL) { 3155 ifa = sctp_ifap; 3156 } else { 3157 /* 3158 * Note for BSD we hit here always other O/S's will 3159 * pass things in via the sctp_ifap argument 3160 * (Panda). 3161 */ 3162 ifa = sctp_find_ifa_by_addr(&store.sa, 3163 vrf_id, SCTP_ADDR_NOT_LOCKED); 3164 } 3165 if (ifa == NULL) { 3166 /* Can't find an interface with that address */ 3167 SCTP_INP_WUNLOCK(inp); 3168 SCTP_INP_INFO_WUNLOCK(); 3169 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3170 return (EADDRNOTAVAIL); 3171 } 3172 #ifdef INET6 3173 if (addr->sa_family == AF_INET6) { 3174 /* GAK, more FIXME IFA lock? */ 3175 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3176 /* Can't bind a non-existent addr. */ 3177 SCTP_INP_WUNLOCK(inp); 3178 SCTP_INP_INFO_WUNLOCK(); 3179 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3180 return (EINVAL); 3181 } 3182 } 3183 #endif 3184 /* we're not bound all */ 3185 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3186 /* allow bindx() to send ASCONF's for binding changes */ 3187 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3188 /* clear automatic addr changes from kernel flag */ 3189 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3190 3191 /* add this address to the endpoint list */ 3192 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3193 if (error != 0) { 3194 SCTP_INP_WUNLOCK(inp); 3195 SCTP_INP_INFO_WUNLOCK(); 3196 return (error); 3197 } 3198 inp->laddr_count++; 3199 } 3200 /* find the bucket */ 3201 if (port_reuse_active) { 3202 /* Put it into tcp 1-2-1 hash */ 3203 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3204 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3205 } else { 3206 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3207 } 3208 /* put it in the bucket */ 3209 LIST_INSERT_HEAD(head, inp, sctp_hash); 3210 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3211 (void *)head, ntohs(lport), port_reuse_active); 3212 /* set in the port */ 3213 inp->sctp_lport = lport; 3214 3215 /* turn off just the unbound flag */ 3216 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3217 SCTP_INP_WUNLOCK(inp); 3218 SCTP_INP_INFO_WUNLOCK(); 3219 return (0); 3220 } 3221 3222 3223 static void 3224 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3225 { 3226 struct sctp_iterator *it, *nit; 3227 3228 /* 3229 * We enter with the only the ITERATOR_LOCK in place and a write 3230 * lock on the inp_info stuff. 3231 */ 3232 it = sctp_it_ctl.cur_it; 3233 if (it && (it->vn != curvnet)) { 3234 /* Its not looking at our VNET */ 3235 return; 3236 } 3237 if (it && (it->inp == inp)) { 3238 /* 3239 * This is tricky and we hold the iterator lock, but when it 3240 * returns and gets the lock (when we release it) the 3241 * iterator will try to operate on inp. We need to stop that 3242 * from happening. But of course the iterator has a 3243 * reference on the stcb and inp. We can mark it and it will 3244 * stop. 3245 * 3246 * If its a single iterator situation, we set the end 3247 * iterator flag. Otherwise we set the iterator to go to the 3248 * next inp. 3249 * 3250 */ 3251 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3252 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3253 } else { 3254 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3255 } 3256 } 3257 /* 3258 * Now go through and remove any single reference to our inp that 3259 * may be still pending on the list 3260 */ 3261 SCTP_IPI_ITERATOR_WQ_LOCK(); 3262 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3263 if (it->vn != curvnet) { 3264 continue; 3265 } 3266 if (it->inp == inp) { 3267 /* This one points to me is it inp specific? */ 3268 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3269 /* Remove and free this one */ 3270 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3271 it, sctp_nxt_itr); 3272 if (it->function_atend != NULL) { 3273 (*it->function_atend) (it->pointer, it->val); 3274 } 3275 SCTP_FREE(it, SCTP_M_ITER); 3276 } else { 3277 it->inp = LIST_NEXT(it->inp, sctp_list); 3278 if (it->inp) { 3279 SCTP_INP_INCR_REF(it->inp); 3280 } 3281 } 3282 /* 3283 * When its put in the refcnt is incremented so decr 3284 * it 3285 */ 3286 SCTP_INP_DECR_REF(inp); 3287 } 3288 } 3289 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3290 } 3291 3292 /* release sctp_inpcb unbind the port */ 3293 void 3294 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3295 { 3296 /* 3297 * Here we free a endpoint. We must find it (if it is in the Hash 3298 * table) and remove it from there. Then we must also find it in the 3299 * overall list and remove it from there. After all removals are 3300 * complete then any timer has to be stopped. Then start the actual 3301 * freeing. a) Any local lists. b) Any associations. c) The hash of 3302 * all associations. d) finally the ep itself. 3303 */ 3304 struct sctp_tcb *asoc, *nasoc; 3305 struct sctp_laddr *laddr, *nladdr; 3306 struct inpcb *ip_pcb; 3307 struct socket *so; 3308 int being_refed = 0; 3309 struct sctp_queued_to_read *sq, *nsq; 3310 int cnt; 3311 sctp_sharedkey_t *shared_key, *nshared_key; 3312 3313 3314 #ifdef SCTP_LOG_CLOSING 3315 sctp_log_closing(inp, NULL, 0); 3316 #endif 3317 SCTP_ITERATOR_LOCK(); 3318 /* mark any iterators on the list or being processed */ 3319 sctp_iterator_inp_being_freed(inp); 3320 SCTP_ITERATOR_UNLOCK(); 3321 so = inp->sctp_socket; 3322 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3323 /* been here before.. eeks.. get out of here */ 3324 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3325 #ifdef SCTP_LOG_CLOSING 3326 sctp_log_closing(inp, NULL, 1); 3327 #endif 3328 return; 3329 } 3330 SCTP_ASOC_CREATE_LOCK(inp); 3331 SCTP_INP_INFO_WLOCK(); 3332 3333 SCTP_INP_WLOCK(inp); 3334 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3335 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3336 /* socket is gone, so no more wakeups allowed */ 3337 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3338 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3339 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3340 3341 } 3342 /* First time through we have the socket lock, after that no more. */ 3343 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3344 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3345 3346 if (inp->control) { 3347 sctp_m_freem(inp->control); 3348 inp->control = NULL; 3349 } 3350 if (inp->pkt) { 3351 sctp_m_freem(inp->pkt); 3352 inp->pkt = NULL; 3353 } 3354 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3355 * here but I will be nice :> (i.e. 3356 * ip_pcb = ep;) */ 3357 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3358 int cnt_in_sd; 3359 3360 cnt_in_sd = 0; 3361 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3362 SCTP_TCB_LOCK(asoc); 3363 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3364 /* Skip guys being freed */ 3365 cnt_in_sd++; 3366 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3367 /* 3368 * Special case - we did not start a 3369 * kill timer on the asoc due to it 3370 * was not closed. So go ahead and 3371 * start it now. 3372 */ 3373 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3374 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3375 } 3376 SCTP_TCB_UNLOCK(asoc); 3377 continue; 3378 } 3379 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3380 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3381 (asoc->asoc.total_output_queue_size == 0)) { 3382 /* 3383 * If we have data in queue, we don't want 3384 * to just free since the app may have done, 3385 * send()/close or connect/send/close. And 3386 * it wants the data to get across first. 3387 */ 3388 /* Just abandon things in the front states */ 3389 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3390 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3391 cnt_in_sd++; 3392 } 3393 continue; 3394 } 3395 /* Disconnect the socket please */ 3396 asoc->sctp_socket = NULL; 3397 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3398 if ((asoc->asoc.size_on_reasm_queue > 0) || 3399 (asoc->asoc.control_pdapi) || 3400 (asoc->asoc.size_on_all_streams > 0) || 3401 (so && (so->so_rcv.sb_cc > 0))) { 3402 /* Left with Data unread */ 3403 struct mbuf *op_err; 3404 3405 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3406 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3407 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3408 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3409 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3410 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3411 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3412 } 3413 if (sctp_free_assoc(inp, asoc, 3414 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3415 cnt_in_sd++; 3416 } 3417 continue; 3418 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3419 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3420 (asoc->asoc.stream_queue_cnt == 0)) { 3421 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3422 goto abort_anyway; 3423 } 3424 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3425 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3426 struct sctp_nets *netp; 3427 3428 /* 3429 * there is nothing queued to send, 3430 * so I send shutdown 3431 */ 3432 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3433 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3434 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3435 } 3436 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3437 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3438 sctp_stop_timers_for_shutdown(asoc); 3439 if (asoc->asoc.alternate) { 3440 netp = asoc->asoc.alternate; 3441 } else { 3442 netp = asoc->asoc.primary_destination; 3443 } 3444 sctp_send_shutdown(asoc, netp); 3445 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3446 netp); 3447 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3448 asoc->asoc.primary_destination); 3449 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3450 } 3451 } else { 3452 /* mark into shutdown pending */ 3453 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3454 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3455 asoc->asoc.primary_destination); 3456 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3457 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3458 } 3459 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3460 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3461 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3462 struct mbuf *op_err; 3463 3464 abort_anyway: 3465 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3466 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3467 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3468 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3469 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3470 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3471 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3472 } 3473 if (sctp_free_assoc(inp, asoc, 3474 SCTP_PCBFREE_NOFORCE, 3475 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3476 cnt_in_sd++; 3477 } 3478 continue; 3479 } else { 3480 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3481 } 3482 } 3483 cnt_in_sd++; 3484 SCTP_TCB_UNLOCK(asoc); 3485 } 3486 /* now is there some left in our SHUTDOWN state? */ 3487 if (cnt_in_sd) { 3488 #ifdef SCTP_LOG_CLOSING 3489 sctp_log_closing(inp, NULL, 2); 3490 #endif 3491 inp->sctp_socket = NULL; 3492 SCTP_INP_WUNLOCK(inp); 3493 SCTP_ASOC_CREATE_UNLOCK(inp); 3494 SCTP_INP_INFO_WUNLOCK(); 3495 return; 3496 } 3497 } 3498 inp->sctp_socket = NULL; 3499 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3500 SCTP_PCB_FLAGS_UNBOUND) { 3501 /* 3502 * ok, this guy has been bound. It's port is somewhere in 3503 * the SCTP_BASE_INFO(hash table). Remove it! 3504 */ 3505 LIST_REMOVE(inp, sctp_hash); 3506 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3507 } 3508 3509 /* 3510 * If there is a timer running to kill us, forget it, since it may 3511 * have a contest on the INP lock.. which would cause us to die ... 3512 */ 3513 cnt = 0; 3514 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3515 SCTP_TCB_LOCK(asoc); 3516 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3517 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3518 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3519 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3520 } 3521 cnt++; 3522 SCTP_TCB_UNLOCK(asoc); 3523 continue; 3524 } 3525 /* Free associations that are NOT killing us */ 3526 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3527 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3528 struct mbuf *op_err; 3529 3530 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3531 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3532 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3533 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3534 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3535 cnt++; 3536 SCTP_TCB_UNLOCK(asoc); 3537 continue; 3538 } 3539 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3540 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3541 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3542 } 3543 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3544 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3545 cnt++; 3546 } 3547 } 3548 if (cnt) { 3549 /* Ok we have someone out there that will kill us */ 3550 #ifdef SCTP_LOG_CLOSING 3551 sctp_log_closing(inp, NULL, 3); 3552 #endif 3553 SCTP_INP_WUNLOCK(inp); 3554 SCTP_ASOC_CREATE_UNLOCK(inp); 3555 SCTP_INP_INFO_WUNLOCK(); 3556 return; 3557 } 3558 if (SCTP_INP_LOCK_CONTENDED(inp)) 3559 being_refed++; 3560 if (SCTP_INP_READ_CONTENDED(inp)) 3561 being_refed++; 3562 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3563 being_refed++; 3564 3565 if ((inp->refcount) || 3566 (being_refed) || 3567 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3568 #ifdef SCTP_LOG_CLOSING 3569 sctp_log_closing(inp, NULL, 4); 3570 #endif 3571 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3572 SCTP_INP_WUNLOCK(inp); 3573 SCTP_ASOC_CREATE_UNLOCK(inp); 3574 SCTP_INP_INFO_WUNLOCK(); 3575 return; 3576 } 3577 inp->sctp_ep.signature_change.type = 0; 3578 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3579 /* 3580 * Remove it from the list .. last thing we need a lock for. 3581 */ 3582 LIST_REMOVE(inp, sctp_list); 3583 SCTP_INP_WUNLOCK(inp); 3584 SCTP_ASOC_CREATE_UNLOCK(inp); 3585 SCTP_INP_INFO_WUNLOCK(); 3586 /* 3587 * Now we release all locks. Since this INP cannot be found anymore 3588 * except possibly by the kill timer that might be running. We call 3589 * the drain function here. It should hit the case were it sees the 3590 * ACTIVE flag cleared and exit out freeing us to proceed and 3591 * destroy everything. 3592 */ 3593 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3594 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3595 } else { 3596 /* Probably un-needed */ 3597 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3598 } 3599 3600 #ifdef SCTP_LOG_CLOSING 3601 sctp_log_closing(inp, NULL, 5); 3602 #endif 3603 3604 3605 if ((inp->sctp_asocidhash) != NULL) { 3606 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3607 inp->sctp_asocidhash = NULL; 3608 } 3609 /* sa_ignore FREED_MEMORY */ 3610 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3611 /* Its only abandoned if it had data left */ 3612 if (sq->length) 3613 SCTP_STAT_INCR(sctps_left_abandon); 3614 3615 TAILQ_REMOVE(&inp->read_queue, sq, next); 3616 sctp_free_remote_addr(sq->whoFrom); 3617 if (so) 3618 so->so_rcv.sb_cc -= sq->length; 3619 if (sq->data) { 3620 sctp_m_freem(sq->data); 3621 sq->data = NULL; 3622 } 3623 /* 3624 * no need to free the net count, since at this point all 3625 * assoc's are gone. 3626 */ 3627 sctp_free_a_readq(NULL, sq); 3628 } 3629 /* Now the sctp_pcb things */ 3630 /* 3631 * free each asoc if it is not already closed/free. we can't use the 3632 * macro here since le_next will get freed as part of the 3633 * sctp_free_assoc() call. 3634 */ 3635 if (ip_pcb->inp_options) { 3636 (void)sctp_m_free(ip_pcb->inp_options); 3637 ip_pcb->inp_options = 0; 3638 } 3639 3640 3641 #ifdef INET6 3642 if (ip_pcb->inp_vflag & INP_IPV6) { 3643 struct in6pcb *in6p; 3644 3645 in6p = (struct in6pcb *)inp; 3646 ip6_freepcbopts(in6p->in6p_outputopts); 3647 } 3648 #endif /* INET6 */ 3649 ip_pcb->inp_vflag = 0; 3650 /* free up authentication fields */ 3651 if (inp->sctp_ep.local_auth_chunks != NULL) 3652 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3653 if (inp->sctp_ep.local_hmacs != NULL) 3654 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3655 3656 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3657 LIST_REMOVE(shared_key, next); 3658 sctp_free_sharedkey(shared_key); 3659 /* sa_ignore FREED_MEMORY */ 3660 } 3661 3662 /* 3663 * if we have an address list the following will free the list of 3664 * ifaddr's that are set into this ep. Again macro limitations here, 3665 * since the LIST_FOREACH could be a bad idea. 3666 */ 3667 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3668 sctp_remove_laddr(laddr); 3669 } 3670 3671 #ifdef SCTP_TRACK_FREED_ASOCS 3672 /* TEMP CODE */ 3673 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3674 LIST_REMOVE(asoc, sctp_tcblist); 3675 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3676 SCTP_DECR_ASOC_COUNT(); 3677 } 3678 /* *** END TEMP CODE *** */ 3679 #endif 3680 /* Now lets see about freeing the EP hash table. */ 3681 if (inp->sctp_tcbhash != NULL) { 3682 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3683 inp->sctp_tcbhash = NULL; 3684 } 3685 /* Now we must put the ep memory back into the zone pool */ 3686 crfree(inp->ip_inp.inp.inp_cred); 3687 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3688 SCTP_INP_LOCK_DESTROY(inp); 3689 SCTP_INP_READ_DESTROY(inp); 3690 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3691 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3692 SCTP_DECR_EP_COUNT(); 3693 } 3694 3695 3696 struct sctp_nets * 3697 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3698 { 3699 struct sctp_nets *net; 3700 3701 /* locate the address */ 3702 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3703 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3704 return (net); 3705 } 3706 return (NULL); 3707 } 3708 3709 3710 int 3711 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3712 { 3713 struct sctp_ifa *sctp_ifa; 3714 3715 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3716 if (sctp_ifa) { 3717 return (1); 3718 } else { 3719 return (0); 3720 } 3721 } 3722 3723 /* 3724 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3725 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3726 * stats of stuff. 3727 */ 3728 int 3729 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3730 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3731 { 3732 /* 3733 * The following is redundant to the same lines in the 3734 * sctp_aloc_assoc() but is needed since others call the add address 3735 * function 3736 */ 3737 struct sctp_nets *net, *netfirst; 3738 int addr_inscope; 3739 3740 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3741 from); 3742 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3743 3744 netfirst = sctp_findnet(stcb, newaddr); 3745 if (netfirst) { 3746 /* 3747 * Lie and return ok, we don't want to make the association 3748 * go away for this behavior. It will happen in the TCP 3749 * model in a connected socket. It does not reach the hash 3750 * table until after the association is built so it can't be 3751 * found. Mark as reachable, since the initial creation will 3752 * have been cleared and the NOT_IN_ASSOC flag will have 3753 * been added... and we don't want to end up removing it 3754 * back out. 3755 */ 3756 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3757 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3758 SCTP_ADDR_UNCONFIRMED); 3759 } else { 3760 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3761 } 3762 3763 return (0); 3764 } 3765 addr_inscope = 1; 3766 switch (newaddr->sa_family) { 3767 #ifdef INET 3768 case AF_INET: 3769 { 3770 struct sockaddr_in *sin; 3771 3772 sin = (struct sockaddr_in *)newaddr; 3773 if (sin->sin_addr.s_addr == 0) { 3774 /* Invalid address */ 3775 return (-1); 3776 } 3777 /* zero out the zero area */ 3778 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3779 3780 /* assure len is set */ 3781 sin->sin_len = sizeof(struct sockaddr_in); 3782 if (set_scope) { 3783 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3784 stcb->asoc.scope.ipv4_local_scope = 1; 3785 } 3786 } else { 3787 /* Validate the address is in scope */ 3788 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3789 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3790 addr_inscope = 0; 3791 } 3792 } 3793 break; 3794 } 3795 #endif 3796 #ifdef INET6 3797 case AF_INET6: 3798 { 3799 struct sockaddr_in6 *sin6; 3800 3801 sin6 = (struct sockaddr_in6 *)newaddr; 3802 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3803 /* Invalid address */ 3804 return (-1); 3805 } 3806 /* assure len is set */ 3807 sin6->sin6_len = sizeof(struct sockaddr_in6); 3808 if (set_scope) { 3809 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3810 stcb->asoc.scope.loopback_scope = 1; 3811 stcb->asoc.scope.local_scope = 0; 3812 stcb->asoc.scope.ipv4_local_scope = 1; 3813 stcb->asoc.scope.site_scope = 1; 3814 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3815 /* 3816 * If the new destination is a 3817 * LINK_LOCAL we must have common 3818 * site scope. Don't set the local 3819 * scope since we may not share all 3820 * links, only loopback can do this. 3821 * Links on the local network would 3822 * also be on our private network 3823 * for v4 too. 3824 */ 3825 stcb->asoc.scope.ipv4_local_scope = 1; 3826 stcb->asoc.scope.site_scope = 1; 3827 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3828 /* 3829 * If the new destination is 3830 * SITE_LOCAL then we must have site 3831 * scope in common. 3832 */ 3833 stcb->asoc.scope.site_scope = 1; 3834 } 3835 } else { 3836 /* Validate the address is in scope */ 3837 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3838 (stcb->asoc.scope.loopback_scope == 0)) { 3839 addr_inscope = 0; 3840 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3841 (stcb->asoc.scope.local_scope == 0)) { 3842 addr_inscope = 0; 3843 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3844 (stcb->asoc.scope.site_scope == 0)) { 3845 addr_inscope = 0; 3846 } 3847 } 3848 break; 3849 } 3850 #endif 3851 default: 3852 /* not supported family type */ 3853 return (-1); 3854 } 3855 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3856 if (net == NULL) { 3857 return (-1); 3858 } 3859 SCTP_INCR_RADDR_COUNT(); 3860 memset(net, 0, sizeof(struct sctp_nets)); 3861 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3862 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3863 switch (newaddr->sa_family) { 3864 #ifdef INET 3865 case AF_INET: 3866 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3867 break; 3868 #endif 3869 #ifdef INET6 3870 case AF_INET6: 3871 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3872 break; 3873 #endif 3874 default: 3875 break; 3876 } 3877 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3878 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3879 stcb->asoc.scope.loopback_scope = 1; 3880 stcb->asoc.scope.ipv4_local_scope = 1; 3881 stcb->asoc.scope.local_scope = 0; 3882 stcb->asoc.scope.site_scope = 1; 3883 addr_inscope = 1; 3884 } 3885 net->failure_threshold = stcb->asoc.def_net_failure; 3886 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3887 if (addr_inscope == 0) { 3888 net->dest_state = (SCTP_ADDR_REACHABLE | 3889 SCTP_ADDR_OUT_OF_SCOPE); 3890 } else { 3891 if (from == SCTP_ADDR_IS_CONFIRMED) 3892 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3893 net->dest_state = SCTP_ADDR_REACHABLE; 3894 else 3895 net->dest_state = SCTP_ADDR_REACHABLE | 3896 SCTP_ADDR_UNCONFIRMED; 3897 } 3898 /* 3899 * We set this to 0, the timer code knows that this means its an 3900 * initial value 3901 */ 3902 net->rto_needed = 1; 3903 net->RTO = 0; 3904 net->RTO_measured = 0; 3905 stcb->asoc.numnets++; 3906 net->ref_count = 1; 3907 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3908 net->port = port; 3909 net->dscp = stcb->asoc.default_dscp; 3910 #ifdef INET6 3911 net->flowlabel = stcb->asoc.default_flowlabel; 3912 #endif 3913 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3914 net->dest_state |= SCTP_ADDR_NOHB; 3915 } else { 3916 net->dest_state &= ~SCTP_ADDR_NOHB; 3917 } 3918 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3919 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3920 } else { 3921 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3922 } 3923 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3924 /* Init the timer structure */ 3925 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3926 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3927 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3928 3929 /* Now generate a route for this guy */ 3930 #ifdef INET6 3931 /* KAME hack: embed scopeid */ 3932 if (newaddr->sa_family == AF_INET6) { 3933 struct sockaddr_in6 *sin6; 3934 3935 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3936 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3937 sin6->sin6_scope_id = 0; 3938 } 3939 #endif 3940 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3941 stcb->asoc.vrf_id, 3942 stcb->sctp_ep->fibnum); 3943 3944 net->src_addr_selected = 0; 3945 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3946 /* Get source address */ 3947 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3948 stcb, 3949 (sctp_route_t *)&net->ro, 3950 net, 3951 0, 3952 stcb->asoc.vrf_id); 3953 if (stcb->asoc.default_mtu > 0) { 3954 net->mtu = stcb->asoc.default_mtu; 3955 switch (net->ro._l_addr.sa.sa_family) { 3956 #ifdef INET 3957 case AF_INET: 3958 net->mtu += SCTP_MIN_V4_OVERHEAD; 3959 break; 3960 #endif 3961 #ifdef INET6 3962 case AF_INET6: 3963 net->mtu += SCTP_MIN_OVERHEAD; 3964 break; 3965 #endif 3966 default: 3967 break; 3968 } 3969 #if defined(INET) || defined(INET6) 3970 if (net->port) { 3971 net->mtu += (uint32_t)sizeof(struct udphdr); 3972 } 3973 #endif 3974 } else if (net->ro._s_addr != NULL) { 3975 uint32_t imtu, rmtu, hcmtu; 3976 3977 net->src_addr_selected = 1; 3978 /* Now get the interface MTU */ 3979 if (net->ro._s_addr->ifn_p != NULL) { 3980 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3981 } else { 3982 imtu = 0; 3983 } 3984 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3985 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3986 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3987 if (rmtu == 0) { 3988 /* 3989 * Start things off to match mtu of 3990 * interface please. 3991 */ 3992 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3993 net->ro.ro_rt, net->mtu); 3994 } 3995 } 3996 } 3997 if (net->mtu == 0) { 3998 if (stcb->asoc.default_mtu > 0) { 3999 net->mtu = stcb->asoc.default_mtu; 4000 switch (net->ro._l_addr.sa.sa_family) { 4001 #ifdef INET 4002 case AF_INET: 4003 net->mtu += SCTP_MIN_V4_OVERHEAD; 4004 break; 4005 #endif 4006 #ifdef INET6 4007 case AF_INET6: 4008 net->mtu += SCTP_MIN_OVERHEAD; 4009 break; 4010 #endif 4011 default: 4012 break; 4013 } 4014 #if defined(INET) || defined(INET6) 4015 if (net->port) { 4016 net->mtu += (uint32_t)sizeof(struct udphdr); 4017 } 4018 #endif 4019 } else { 4020 switch (newaddr->sa_family) { 4021 #ifdef INET 4022 case AF_INET: 4023 net->mtu = SCTP_DEFAULT_MTU; 4024 break; 4025 #endif 4026 #ifdef INET6 4027 case AF_INET6: 4028 net->mtu = 1280; 4029 break; 4030 #endif 4031 default: 4032 break; 4033 } 4034 } 4035 } 4036 #if defined(INET) || defined(INET6) 4037 if (net->port) { 4038 net->mtu -= (uint32_t)sizeof(struct udphdr); 4039 } 4040 #endif 4041 if (from == SCTP_ALLOC_ASOC) { 4042 stcb->asoc.smallest_mtu = net->mtu; 4043 } 4044 if (stcb->asoc.smallest_mtu > net->mtu) { 4045 sctp_pathmtu_adjustment(stcb, net->mtu); 4046 } 4047 #ifdef INET6 4048 if (newaddr->sa_family == AF_INET6) { 4049 struct sockaddr_in6 *sin6; 4050 4051 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4052 (void)sa6_recoverscope(sin6); 4053 } 4054 #endif 4055 4056 /* JRS - Use the congestion control given in the CC module */ 4057 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4058 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4059 4060 /* 4061 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4062 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4063 */ 4064 net->find_pseudo_cumack = 1; 4065 net->find_rtx_pseudo_cumack = 1; 4066 /* Choose an initial flowid. */ 4067 net->flowid = stcb->asoc.my_vtag ^ 4068 ntohs(stcb->rport) ^ 4069 ntohs(stcb->sctp_ep->sctp_lport); 4070 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4071 if (netp) { 4072 *netp = net; 4073 } 4074 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4075 if (net->ro.ro_rt == NULL) { 4076 /* Since we have no route put it at the back */ 4077 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4078 } else if (netfirst == NULL) { 4079 /* We are the first one in the pool. */ 4080 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4081 } else if (netfirst->ro.ro_rt == NULL) { 4082 /* 4083 * First one has NO route. Place this one ahead of the first 4084 * one. 4085 */ 4086 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4087 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4088 /* 4089 * This one has a different interface than the one at the 4090 * top of the list. Place it ahead. 4091 */ 4092 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4093 } else { 4094 /* 4095 * Ok we have the same interface as the first one. Move 4096 * forward until we find either a) one with a NULL route... 4097 * insert ahead of that b) one with a different ifp.. insert 4098 * after that. c) end of the list.. insert at the tail. 4099 */ 4100 struct sctp_nets *netlook; 4101 4102 do { 4103 netlook = TAILQ_NEXT(netfirst, sctp_next); 4104 if (netlook == NULL) { 4105 /* End of the list */ 4106 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4107 break; 4108 } else if (netlook->ro.ro_rt == NULL) { 4109 /* next one has NO route */ 4110 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4111 break; 4112 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4113 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4114 net, sctp_next); 4115 break; 4116 } 4117 /* Shift forward */ 4118 netfirst = netlook; 4119 } while (netlook != NULL); 4120 } 4121 4122 /* got to have a primary set */ 4123 if (stcb->asoc.primary_destination == 0) { 4124 stcb->asoc.primary_destination = net; 4125 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4126 (net->ro.ro_rt) && 4127 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4128 /* No route to current primary adopt new primary */ 4129 stcb->asoc.primary_destination = net; 4130 } 4131 /* Validate primary is first */ 4132 net = TAILQ_FIRST(&stcb->asoc.nets); 4133 if ((net != stcb->asoc.primary_destination) && 4134 (stcb->asoc.primary_destination)) { 4135 /* 4136 * first one on the list is NOT the primary sctp_cmpaddr() 4137 * is much more efficient if the primary is the first on the 4138 * list, make it so. 4139 */ 4140 TAILQ_REMOVE(&stcb->asoc.nets, 4141 stcb->asoc.primary_destination, sctp_next); 4142 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4143 stcb->asoc.primary_destination, sctp_next); 4144 } 4145 return (0); 4146 } 4147 4148 4149 static uint32_t 4150 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4151 { 4152 uint32_t id; 4153 struct sctpasochead *head; 4154 struct sctp_tcb *lstcb; 4155 4156 try_again: 4157 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4158 /* TSNH */ 4159 return (0); 4160 } 4161 /* 4162 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4163 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4164 */ 4165 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4166 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4167 } 4168 id = inp->sctp_associd_counter; 4169 inp->sctp_associd_counter++; 4170 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4171 if (lstcb) { 4172 goto try_again; 4173 } 4174 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4175 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4176 stcb->asoc.in_asocid_hash = 1; 4177 return (id); 4178 } 4179 4180 /* 4181 * allocate an association and add it to the endpoint. The caller must be 4182 * careful to add all additional addresses once they are know right away or 4183 * else the assoc will be may experience a blackout scenario. 4184 */ 4185 struct sctp_tcb * 4186 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4187 int *error, uint32_t override_tag, uint32_t vrf_id, 4188 uint16_t o_streams, uint16_t port, 4189 struct thread *p, 4190 int initialize_auth_params) 4191 { 4192 /* note the p argument is only valid in unbound sockets */ 4193 4194 struct sctp_tcb *stcb; 4195 struct sctp_association *asoc; 4196 struct sctpasochead *head; 4197 uint16_t rport; 4198 int err; 4199 4200 /* 4201 * Assumption made here: Caller has done a 4202 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4203 * address does not exist already. 4204 */ 4205 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4206 /* Hit max assoc, sorry no more */ 4207 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4208 *error = ENOBUFS; 4209 return (NULL); 4210 } 4211 if (firstaddr == NULL) { 4212 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4213 *error = EINVAL; 4214 return (NULL); 4215 } 4216 SCTP_INP_RLOCK(inp); 4217 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4218 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4219 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4220 /* 4221 * If its in the TCP pool, its NOT allowed to create an 4222 * association. The parent listener needs to call 4223 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4224 * off, or connected one does this.. its an error. 4225 */ 4226 SCTP_INP_RUNLOCK(inp); 4227 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4228 *error = EINVAL; 4229 return (NULL); 4230 } 4231 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4232 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4233 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4234 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4235 SCTP_INP_RUNLOCK(inp); 4236 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4237 *error = EINVAL; 4238 return (NULL); 4239 } 4240 } 4241 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4242 #ifdef SCTP_DEBUG 4243 if (firstaddr) { 4244 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4245 switch (firstaddr->sa_family) { 4246 #ifdef INET 4247 case AF_INET: 4248 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4249 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4250 break; 4251 #endif 4252 #ifdef INET6 4253 case AF_INET6: 4254 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4255 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4256 break; 4257 #endif 4258 default: 4259 break; 4260 } 4261 } else { 4262 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4263 } 4264 #endif /* SCTP_DEBUG */ 4265 switch (firstaddr->sa_family) { 4266 #ifdef INET 4267 case AF_INET: 4268 { 4269 struct sockaddr_in *sin; 4270 4271 sin = (struct sockaddr_in *)firstaddr; 4272 if ((ntohs(sin->sin_port) == 0) || 4273 (sin->sin_addr.s_addr == INADDR_ANY) || 4274 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4275 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4276 /* Invalid address */ 4277 SCTP_INP_RUNLOCK(inp); 4278 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4279 *error = EINVAL; 4280 return (NULL); 4281 } 4282 rport = sin->sin_port; 4283 break; 4284 } 4285 #endif 4286 #ifdef INET6 4287 case AF_INET6: 4288 { 4289 struct sockaddr_in6 *sin6; 4290 4291 sin6 = (struct sockaddr_in6 *)firstaddr; 4292 if ((ntohs(sin6->sin6_port) == 0) || 4293 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4294 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4295 /* Invalid address */ 4296 SCTP_INP_RUNLOCK(inp); 4297 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4298 *error = EINVAL; 4299 return (NULL); 4300 } 4301 rport = sin6->sin6_port; 4302 break; 4303 } 4304 #endif 4305 default: 4306 /* not supported family type */ 4307 SCTP_INP_RUNLOCK(inp); 4308 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4309 *error = EINVAL; 4310 return (NULL); 4311 } 4312 SCTP_INP_RUNLOCK(inp); 4313 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4314 /* 4315 * If you have not performed a bind, then we need to do the 4316 * ephemeral bind for you. 4317 */ 4318 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4319 (struct sockaddr *)NULL, 4320 (struct sctp_ifa *)NULL, 4321 p 4322 ))) { 4323 /* bind error, probably perm */ 4324 *error = err; 4325 return (NULL); 4326 } 4327 } 4328 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4329 if (stcb == NULL) { 4330 /* out of memory? */ 4331 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4332 *error = ENOMEM; 4333 return (NULL); 4334 } 4335 SCTP_INCR_ASOC_COUNT(); 4336 4337 memset(stcb, 0, sizeof(*stcb)); 4338 asoc = &stcb->asoc; 4339 4340 SCTP_TCB_LOCK_INIT(stcb); 4341 SCTP_TCB_SEND_LOCK_INIT(stcb); 4342 stcb->rport = rport; 4343 /* setup back pointer's */ 4344 stcb->sctp_ep = inp; 4345 stcb->sctp_socket = inp->sctp_socket; 4346 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4347 /* failed */ 4348 SCTP_TCB_LOCK_DESTROY(stcb); 4349 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4350 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4351 SCTP_DECR_ASOC_COUNT(); 4352 *error = err; 4353 return (NULL); 4354 } 4355 /* and the port */ 4356 SCTP_INP_INFO_WLOCK(); 4357 SCTP_INP_WLOCK(inp); 4358 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4359 /* inpcb freed while alloc going on */ 4360 SCTP_TCB_LOCK_DESTROY(stcb); 4361 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4362 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4363 SCTP_INP_WUNLOCK(inp); 4364 SCTP_INP_INFO_WUNLOCK(); 4365 SCTP_DECR_ASOC_COUNT(); 4366 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4367 *error = EINVAL; 4368 return (NULL); 4369 } 4370 SCTP_TCB_LOCK(stcb); 4371 4372 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4373 /* now that my_vtag is set, add it to the hash */ 4374 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4375 /* put it in the bucket in the vtag hash of assoc's for the system */ 4376 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4377 SCTP_INP_INFO_WUNLOCK(); 4378 4379 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4380 /* failure.. memory error? */ 4381 if (asoc->strmout) { 4382 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4383 asoc->strmout = NULL; 4384 } 4385 if (asoc->mapping_array) { 4386 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4387 asoc->mapping_array = NULL; 4388 } 4389 if (asoc->nr_mapping_array) { 4390 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4391 asoc->nr_mapping_array = NULL; 4392 } 4393 SCTP_DECR_ASOC_COUNT(); 4394 SCTP_TCB_UNLOCK(stcb); 4395 SCTP_TCB_LOCK_DESTROY(stcb); 4396 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4397 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4398 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4399 SCTP_INP_WUNLOCK(inp); 4400 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4401 *error = ENOBUFS; 4402 return (NULL); 4403 } 4404 /* Init all the timers */ 4405 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4406 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4407 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4408 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4409 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4410 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4411 4412 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4413 /* now file the port under the hash as well */ 4414 if (inp->sctp_tcbhash != NULL) { 4415 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4416 inp->sctp_hashmark)]; 4417 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4418 } 4419 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4420 sctp_initialize_auth_params(inp, stcb); 4421 } 4422 SCTP_INP_WUNLOCK(inp); 4423 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4424 return (stcb); 4425 } 4426 4427 4428 void 4429 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4430 { 4431 struct sctp_inpcb *inp; 4432 struct sctp_association *asoc; 4433 4434 inp = stcb->sctp_ep; 4435 asoc = &stcb->asoc; 4436 asoc->numnets--; 4437 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4438 if (net == asoc->primary_destination) { 4439 /* Reset primary */ 4440 struct sctp_nets *lnet; 4441 4442 lnet = TAILQ_FIRST(&asoc->nets); 4443 /* 4444 * Mobility adaptation Ideally, if deleted destination is 4445 * the primary, it becomes a fast retransmission trigger by 4446 * the subsequent SET PRIMARY. (by micchie) 4447 */ 4448 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4449 SCTP_MOBILITY_BASE) || 4450 sctp_is_mobility_feature_on(stcb->sctp_ep, 4451 SCTP_MOBILITY_FASTHANDOFF)) { 4452 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4453 if (asoc->deleted_primary != NULL) { 4454 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4455 goto out; 4456 } 4457 asoc->deleted_primary = net; 4458 atomic_add_int(&net->ref_count, 1); 4459 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4460 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4461 sctp_mobility_feature_on(stcb->sctp_ep, 4462 SCTP_MOBILITY_PRIM_DELETED); 4463 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4464 stcb->sctp_ep, stcb, NULL); 4465 } 4466 out: 4467 /* Try to find a confirmed primary */ 4468 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4469 } 4470 if (net == asoc->last_data_chunk_from) { 4471 /* Reset primary */ 4472 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4473 } 4474 if (net == asoc->last_control_chunk_from) { 4475 /* Clear net */ 4476 asoc->last_control_chunk_from = NULL; 4477 } 4478 if (net == stcb->asoc.alternate) { 4479 sctp_free_remote_addr(stcb->asoc.alternate); 4480 stcb->asoc.alternate = NULL; 4481 } 4482 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4483 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4484 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4485 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4486 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4487 sctp_free_remote_addr(net); 4488 } 4489 4490 /* 4491 * remove a remote endpoint address from an association, it will fail if the 4492 * address does not exist. 4493 */ 4494 int 4495 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4496 { 4497 /* 4498 * Here we need to remove a remote address. This is quite simple, we 4499 * first find it in the list of address for the association 4500 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4501 * on that item. Note we do not allow it to be removed if there are 4502 * no other addresses. 4503 */ 4504 struct sctp_association *asoc; 4505 struct sctp_nets *net, *nnet; 4506 4507 asoc = &stcb->asoc; 4508 4509 /* locate the address */ 4510 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4511 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4512 continue; 4513 } 4514 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4515 remaddr)) { 4516 /* we found the guy */ 4517 if (asoc->numnets < 2) { 4518 /* Must have at LEAST two remote addresses */ 4519 return (-1); 4520 } else { 4521 sctp_remove_net(stcb, net); 4522 return (0); 4523 } 4524 } 4525 } 4526 /* not found. */ 4527 return (-2); 4528 } 4529 4530 void 4531 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4532 { 4533 struct sctpvtaghead *chain; 4534 struct sctp_tagblock *twait_block; 4535 int found = 0; 4536 int i; 4537 4538 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4539 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4540 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4541 if ((twait_block->vtag_block[i].v_tag == tag) && 4542 (twait_block->vtag_block[i].lport == lport) && 4543 (twait_block->vtag_block[i].rport == rport)) { 4544 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4545 twait_block->vtag_block[i].v_tag = 0; 4546 twait_block->vtag_block[i].lport = 0; 4547 twait_block->vtag_block[i].rport = 0; 4548 found = 1; 4549 break; 4550 } 4551 } 4552 if (found) 4553 break; 4554 } 4555 } 4556 4557 int 4558 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4559 { 4560 struct sctpvtaghead *chain; 4561 struct sctp_tagblock *twait_block; 4562 int found = 0; 4563 int i; 4564 4565 SCTP_INP_INFO_WLOCK(); 4566 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4567 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4568 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4569 if ((twait_block->vtag_block[i].v_tag == tag) && 4570 (twait_block->vtag_block[i].lport == lport) && 4571 (twait_block->vtag_block[i].rport == rport)) { 4572 found = 1; 4573 break; 4574 } 4575 } 4576 if (found) 4577 break; 4578 } 4579 SCTP_INP_INFO_WUNLOCK(); 4580 return (found); 4581 } 4582 4583 4584 void 4585 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4586 { 4587 struct sctpvtaghead *chain; 4588 struct sctp_tagblock *twait_block; 4589 struct timeval now; 4590 int set, i; 4591 4592 if (time == 0) { 4593 /* Its disabled */ 4594 return; 4595 } 4596 (void)SCTP_GETTIME_TIMEVAL(&now); 4597 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4598 set = 0; 4599 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4600 /* Block(s) present, lets find space, and expire on the fly */ 4601 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4602 if ((twait_block->vtag_block[i].v_tag == 0) && 4603 !set) { 4604 twait_block->vtag_block[i].tv_sec_at_expire = 4605 now.tv_sec + time; 4606 twait_block->vtag_block[i].v_tag = tag; 4607 twait_block->vtag_block[i].lport = lport; 4608 twait_block->vtag_block[i].rport = rport; 4609 set = 1; 4610 } else if ((twait_block->vtag_block[i].v_tag) && 4611 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4612 /* Audit expires this guy */ 4613 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4614 twait_block->vtag_block[i].v_tag = 0; 4615 twait_block->vtag_block[i].lport = 0; 4616 twait_block->vtag_block[i].rport = 0; 4617 if (set == 0) { 4618 /* Reuse it for my new tag */ 4619 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4620 twait_block->vtag_block[i].v_tag = tag; 4621 twait_block->vtag_block[i].lport = lport; 4622 twait_block->vtag_block[i].rport = rport; 4623 set = 1; 4624 } 4625 } 4626 } 4627 if (set) { 4628 /* 4629 * We only do up to the block where we can place our 4630 * tag for audits 4631 */ 4632 break; 4633 } 4634 } 4635 /* Need to add a new block to chain */ 4636 if (!set) { 4637 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4638 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4639 if (twait_block == NULL) { 4640 return; 4641 } 4642 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4643 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4644 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4645 twait_block->vtag_block[0].v_tag = tag; 4646 twait_block->vtag_block[0].lport = lport; 4647 twait_block->vtag_block[0].rport = rport; 4648 } 4649 } 4650 4651 void 4652 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4653 { 4654 struct sctp_tmit_chunk *chk, *nchk; 4655 struct sctp_queued_to_read *control, *ncontrol; 4656 4657 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4658 TAILQ_REMOVE(rh, control, next_instrm); 4659 control->on_strm_q = 0; 4660 if (control->on_read_q == 0) { 4661 sctp_free_remote_addr(control->whoFrom); 4662 if (control->data) { 4663 sctp_m_freem(control->data); 4664 control->data = NULL; 4665 } 4666 } 4667 /* Reassembly free? */ 4668 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4669 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4670 if (chk->data) { 4671 sctp_m_freem(chk->data); 4672 chk->data = NULL; 4673 } 4674 if (chk->holds_key_ref) 4675 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4676 sctp_free_remote_addr(chk->whoTo); 4677 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4678 SCTP_DECR_CHK_COUNT(); 4679 /* sa_ignore FREED_MEMORY */ 4680 } 4681 /* 4682 * We don't free the address here since all the net's were 4683 * freed above. 4684 */ 4685 if (control->on_read_q == 0) { 4686 sctp_free_a_readq(stcb, control); 4687 } 4688 } 4689 } 4690 4691 4692 /*- 4693 * Free the association after un-hashing the remote port. This 4694 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4695 * expect that the input to this function IS a locked TCB. 4696 * It will return 0, if it did NOT destroy the association (instead 4697 * it unlocks it. It will return NON-zero if it either destroyed the 4698 * association OR the association is already destroyed. 4699 */ 4700 int 4701 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4702 { 4703 int i; 4704 struct sctp_association *asoc; 4705 struct sctp_nets *net, *nnet; 4706 struct sctp_laddr *laddr, *naddr; 4707 struct sctp_tmit_chunk *chk, *nchk; 4708 struct sctp_asconf_addr *aparam, *naparam; 4709 struct sctp_asconf_ack *aack, *naack; 4710 struct sctp_stream_reset_list *strrst, *nstrrst; 4711 struct sctp_queued_to_read *sq, *nsq; 4712 struct sctp_stream_queue_pending *sp, *nsp; 4713 sctp_sharedkey_t *shared_key, *nshared_key; 4714 struct socket *so; 4715 4716 /* first, lets purge the entry from the hash table. */ 4717 4718 #ifdef SCTP_LOG_CLOSING 4719 sctp_log_closing(inp, stcb, 6); 4720 #endif 4721 if (stcb->asoc.state == 0) { 4722 #ifdef SCTP_LOG_CLOSING 4723 sctp_log_closing(inp, NULL, 7); 4724 #endif 4725 /* there is no asoc, really TSNH :-0 */ 4726 return (1); 4727 } 4728 SCTP_TCB_SEND_LOCK(stcb); 4729 if (stcb->asoc.alternate) { 4730 sctp_free_remote_addr(stcb->asoc.alternate); 4731 stcb->asoc.alternate = NULL; 4732 } 4733 /* TEMP CODE */ 4734 if (stcb->freed_from_where == 0) { 4735 /* Only record the first place free happened from */ 4736 stcb->freed_from_where = from_location; 4737 } 4738 /* TEMP CODE */ 4739 4740 asoc = &stcb->asoc; 4741 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4742 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4743 /* nothing around */ 4744 so = NULL; 4745 else 4746 so = inp->sctp_socket; 4747 4748 /* 4749 * We used timer based freeing if a reader or writer is in the way. 4750 * So we first check if we are actually being called from a timer, 4751 * if so we abort early if a reader or writer is still in the way. 4752 */ 4753 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4754 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4755 /* 4756 * is it the timer driving us? if so are the reader/writers 4757 * gone? 4758 */ 4759 if (stcb->asoc.refcnt) { 4760 /* nope, reader or writer in the way */ 4761 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4762 /* no asoc destroyed */ 4763 SCTP_TCB_SEND_UNLOCK(stcb); 4764 SCTP_TCB_UNLOCK(stcb); 4765 #ifdef SCTP_LOG_CLOSING 4766 sctp_log_closing(inp, stcb, 8); 4767 #endif 4768 return (0); 4769 } 4770 } 4771 /* Now clean up any other timers */ 4772 sctp_stop_association_timers(stcb, false); 4773 /* Now the read queue needs to be cleaned up (only once) */ 4774 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4775 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4776 SCTP_INP_READ_LOCK(inp); 4777 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4778 if (sq->stcb == stcb) { 4779 sq->do_not_ref_stcb = 1; 4780 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4781 /* 4782 * If there is no end, there never will be 4783 * now. 4784 */ 4785 if (sq->end_added == 0) { 4786 /* Held for PD-API clear that. */ 4787 sq->pdapi_aborted = 1; 4788 sq->held_length = 0; 4789 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4790 /* 4791 * Need to add a PD-API 4792 * aborted indication. 4793 * Setting the control_pdapi 4794 * assures that it will be 4795 * added right after this 4796 * msg. 4797 */ 4798 uint32_t strseq; 4799 4800 stcb->asoc.control_pdapi = sq; 4801 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4802 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4803 stcb, 4804 SCTP_PARTIAL_DELIVERY_ABORTED, 4805 (void *)&strseq, 4806 SCTP_SO_LOCKED); 4807 stcb->asoc.control_pdapi = NULL; 4808 } 4809 } 4810 /* Add an end to wake them */ 4811 sq->end_added = 1; 4812 } 4813 } 4814 SCTP_INP_READ_UNLOCK(inp); 4815 if (stcb->block_entry) { 4816 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4817 stcb->block_entry->error = ECONNRESET; 4818 stcb->block_entry = NULL; 4819 } 4820 } 4821 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4822 /* 4823 * Someone holds a reference OR the socket is unaccepted 4824 * yet. 4825 */ 4826 if ((stcb->asoc.refcnt) || 4827 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4828 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4829 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4830 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4831 } 4832 SCTP_TCB_SEND_UNLOCK(stcb); 4833 SCTP_TCB_UNLOCK(stcb); 4834 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4835 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4836 /* nothing around */ 4837 so = NULL; 4838 if (so) { 4839 /* Wake any reader/writers */ 4840 sctp_sorwakeup(inp, so); 4841 sctp_sowwakeup(inp, so); 4842 } 4843 4844 #ifdef SCTP_LOG_CLOSING 4845 sctp_log_closing(inp, stcb, 9); 4846 #endif 4847 /* no asoc destroyed */ 4848 return (0); 4849 } 4850 #ifdef SCTP_LOG_CLOSING 4851 sctp_log_closing(inp, stcb, 10); 4852 #endif 4853 /* 4854 * When I reach here, no others want to kill the assoc yet.. and I 4855 * own the lock. Now its possible an abort comes in when I do the 4856 * lock exchange below to grab all the locks to do the final take 4857 * out. to prevent this we increment the count, which will start a 4858 * timer and blow out above thus assuring us that we hold exclusive 4859 * killing of the asoc. Note that after getting back the TCB lock we 4860 * will go ahead and increment the counter back up and stop any 4861 * timer a passing stranger may have started :-S 4862 */ 4863 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4864 atomic_add_int(&stcb->asoc.refcnt, 1); 4865 4866 SCTP_TCB_SEND_UNLOCK(stcb); 4867 SCTP_TCB_UNLOCK(stcb); 4868 SCTP_INP_INFO_WLOCK(); 4869 SCTP_INP_WLOCK(inp); 4870 SCTP_TCB_LOCK(stcb); 4871 SCTP_TCB_SEND_LOCK(stcb); 4872 } 4873 /* Double check the GONE flag */ 4874 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4875 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4876 /* nothing around */ 4877 so = NULL; 4878 4879 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4880 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4881 /* 4882 * For TCP type we need special handling when we are 4883 * connected. We also include the peel'ed off ones to. 4884 */ 4885 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4886 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4887 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4888 if (so) { 4889 SOCK_LOCK(so); 4890 so->so_state &= ~(SS_ISCONNECTING | 4891 SS_ISDISCONNECTING | 4892 SS_ISCONFIRMING | 4893 SS_ISCONNECTED); 4894 so->so_state |= SS_ISDISCONNECTED; 4895 socantrcvmore_locked(so); 4896 socantsendmore(so); 4897 sctp_sowwakeup(inp, so); 4898 sctp_sorwakeup(inp, so); 4899 SCTP_SOWAKEUP(so); 4900 } 4901 } 4902 } 4903 4904 /* 4905 * Make it invalid too, that way if its about to run it will abort 4906 * and return. 4907 */ 4908 /* re-increment the lock */ 4909 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4910 atomic_add_int(&stcb->asoc.refcnt, -1); 4911 } 4912 if (stcb->asoc.refcnt) { 4913 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4914 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4915 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4916 SCTP_INP_INFO_WUNLOCK(); 4917 SCTP_INP_WUNLOCK(inp); 4918 } 4919 SCTP_TCB_SEND_UNLOCK(stcb); 4920 SCTP_TCB_UNLOCK(stcb); 4921 return (0); 4922 } 4923 asoc->state = 0; 4924 if (inp->sctp_tcbhash) { 4925 LIST_REMOVE(stcb, sctp_tcbhash); 4926 } 4927 if (stcb->asoc.in_asocid_hash) { 4928 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4929 } 4930 /* Now lets remove it from the list of ALL associations in the EP */ 4931 LIST_REMOVE(stcb, sctp_tcblist); 4932 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4933 SCTP_INP_INCR_REF(inp); 4934 SCTP_INP_WUNLOCK(inp); 4935 } 4936 /* pull from vtag hash */ 4937 LIST_REMOVE(stcb, sctp_asocs); 4938 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4939 inp->sctp_lport, stcb->rport); 4940 4941 /* 4942 * Now restop the timers to be sure this is paranoia at is finest! 4943 */ 4944 sctp_stop_association_timers(stcb, true); 4945 4946 /* 4947 * The chunk lists and such SHOULD be empty but we check them just 4948 * in case. 4949 */ 4950 /* anything on the wheel needs to be removed */ 4951 for (i = 0; i < asoc->streamoutcnt; i++) { 4952 struct sctp_stream_out *outs; 4953 4954 outs = &asoc->strmout[i]; 4955 /* now clean up any chunks here */ 4956 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4957 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4958 TAILQ_REMOVE(&outs->outqueue, sp, next); 4959 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1); 4960 sctp_free_spbufspace(stcb, asoc, sp); 4961 if (sp->data) { 4962 if (so) { 4963 /* Still an open socket - report */ 4964 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4965 0, (void *)sp, SCTP_SO_LOCKED); 4966 } 4967 if (sp->data) { 4968 sctp_m_freem(sp->data); 4969 sp->data = NULL; 4970 sp->tail_mbuf = NULL; 4971 sp->length = 0; 4972 } 4973 } 4974 if (sp->net) { 4975 sctp_free_remote_addr(sp->net); 4976 sp->net = NULL; 4977 } 4978 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4979 } 4980 } 4981 /* sa_ignore FREED_MEMORY */ 4982 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4983 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4984 SCTP_FREE(strrst, SCTP_M_STRESET); 4985 } 4986 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4987 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4988 if (sq->data) { 4989 sctp_m_freem(sq->data); 4990 sq->data = NULL; 4991 } 4992 sctp_free_remote_addr(sq->whoFrom); 4993 sq->whoFrom = NULL; 4994 sq->stcb = NULL; 4995 /* Free the ctl entry */ 4996 sctp_free_a_readq(stcb, sq); 4997 /* sa_ignore FREED_MEMORY */ 4998 } 4999 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5000 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5001 if (chk->data) { 5002 sctp_m_freem(chk->data); 5003 chk->data = NULL; 5004 } 5005 if (chk->holds_key_ref) 5006 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5007 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5008 SCTP_DECR_CHK_COUNT(); 5009 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5010 asoc->free_chunk_cnt--; 5011 /* sa_ignore FREED_MEMORY */ 5012 } 5013 /* pending send queue SHOULD be empty */ 5014 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5015 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5016 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5017 #ifdef INVARIANTS 5018 } else { 5019 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5020 #endif 5021 } 5022 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5023 if (chk->data) { 5024 if (so) { 5025 /* Still a socket? */ 5026 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5027 0, chk, SCTP_SO_LOCKED); 5028 } 5029 if (chk->data) { 5030 sctp_m_freem(chk->data); 5031 chk->data = NULL; 5032 } 5033 } 5034 if (chk->holds_key_ref) 5035 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5036 if (chk->whoTo) { 5037 sctp_free_remote_addr(chk->whoTo); 5038 chk->whoTo = NULL; 5039 } 5040 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5041 SCTP_DECR_CHK_COUNT(); 5042 /* sa_ignore FREED_MEMORY */ 5043 } 5044 /* sent queue SHOULD be empty */ 5045 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5046 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5047 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5048 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5049 #ifdef INVARIANTS 5050 } else { 5051 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5052 #endif 5053 } 5054 } 5055 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5056 if (chk->data) { 5057 if (so) { 5058 /* Still a socket? */ 5059 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5060 0, chk, SCTP_SO_LOCKED); 5061 } 5062 if (chk->data) { 5063 sctp_m_freem(chk->data); 5064 chk->data = NULL; 5065 } 5066 } 5067 if (chk->holds_key_ref) 5068 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5069 sctp_free_remote_addr(chk->whoTo); 5070 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5071 SCTP_DECR_CHK_COUNT(); 5072 /* sa_ignore FREED_MEMORY */ 5073 } 5074 #ifdef INVARIANTS 5075 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5076 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5077 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5078 } 5079 } 5080 #endif 5081 /* control queue MAY not be empty */ 5082 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5083 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5084 if (chk->data) { 5085 sctp_m_freem(chk->data); 5086 chk->data = NULL; 5087 } 5088 if (chk->holds_key_ref) 5089 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5090 sctp_free_remote_addr(chk->whoTo); 5091 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5092 SCTP_DECR_CHK_COUNT(); 5093 /* sa_ignore FREED_MEMORY */ 5094 } 5095 /* ASCONF queue MAY not be empty */ 5096 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5097 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5098 if (chk->data) { 5099 sctp_m_freem(chk->data); 5100 chk->data = NULL; 5101 } 5102 if (chk->holds_key_ref) 5103 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5104 sctp_free_remote_addr(chk->whoTo); 5105 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5106 SCTP_DECR_CHK_COUNT(); 5107 /* sa_ignore FREED_MEMORY */ 5108 } 5109 if (asoc->mapping_array) { 5110 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5111 asoc->mapping_array = NULL; 5112 } 5113 if (asoc->nr_mapping_array) { 5114 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5115 asoc->nr_mapping_array = NULL; 5116 } 5117 /* the stream outs */ 5118 if (asoc->strmout) { 5119 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5120 asoc->strmout = NULL; 5121 } 5122 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5123 if (asoc->strmin) { 5124 for (i = 0; i < asoc->streamincnt; i++) { 5125 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5126 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5127 } 5128 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5129 asoc->strmin = NULL; 5130 } 5131 asoc->streamincnt = 0; 5132 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5133 #ifdef INVARIANTS 5134 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5135 panic("no net's left alloc'ed, or list points to itself"); 5136 } 5137 #endif 5138 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5139 sctp_free_remote_addr(net); 5140 } 5141 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5142 /* sa_ignore FREED_MEMORY */ 5143 sctp_remove_laddr(laddr); 5144 } 5145 5146 /* pending asconf (address) parameters */ 5147 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5148 /* sa_ignore FREED_MEMORY */ 5149 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5150 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5151 } 5152 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5153 /* sa_ignore FREED_MEMORY */ 5154 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5155 if (aack->data != NULL) { 5156 sctp_m_freem(aack->data); 5157 } 5158 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5159 } 5160 /* clean up auth stuff */ 5161 if (asoc->local_hmacs) 5162 sctp_free_hmaclist(asoc->local_hmacs); 5163 if (asoc->peer_hmacs) 5164 sctp_free_hmaclist(asoc->peer_hmacs); 5165 5166 if (asoc->local_auth_chunks) 5167 sctp_free_chunklist(asoc->local_auth_chunks); 5168 if (asoc->peer_auth_chunks) 5169 sctp_free_chunklist(asoc->peer_auth_chunks); 5170 5171 sctp_free_authinfo(&asoc->authinfo); 5172 5173 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5174 LIST_REMOVE(shared_key, next); 5175 sctp_free_sharedkey(shared_key); 5176 /* sa_ignore FREED_MEMORY */ 5177 } 5178 5179 /* Insert new items here :> */ 5180 5181 /* Get rid of LOCK */ 5182 SCTP_TCB_SEND_UNLOCK(stcb); 5183 SCTP_TCB_UNLOCK(stcb); 5184 SCTP_TCB_LOCK_DESTROY(stcb); 5185 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5186 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5187 SCTP_INP_INFO_WUNLOCK(); 5188 SCTP_INP_RLOCK(inp); 5189 } 5190 #ifdef SCTP_TRACK_FREED_ASOCS 5191 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5192 /* now clean up the tasoc itself */ 5193 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5194 SCTP_DECR_ASOC_COUNT(); 5195 } else { 5196 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5197 } 5198 #else 5199 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5200 SCTP_DECR_ASOC_COUNT(); 5201 #endif 5202 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5203 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5204 /* 5205 * If its NOT the inp_free calling us AND sctp_close 5206 * as been called, we call back... 5207 */ 5208 SCTP_INP_RUNLOCK(inp); 5209 /* 5210 * This will start the kill timer (if we are the 5211 * last one) since we hold an increment yet. But 5212 * this is the only safe way to do this since 5213 * otherwise if the socket closes at the same time 5214 * we are here we might collide in the cleanup. 5215 */ 5216 sctp_inpcb_free(inp, 5217 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5218 SCTP_CALLED_DIRECTLY_NOCMPSET); 5219 SCTP_INP_DECR_REF(inp); 5220 } else { 5221 /* The socket is still open. */ 5222 SCTP_INP_DECR_REF(inp); 5223 SCTP_INP_RUNLOCK(inp); 5224 } 5225 } 5226 /* destroyed the asoc */ 5227 #ifdef SCTP_LOG_CLOSING 5228 sctp_log_closing(inp, NULL, 11); 5229 #endif 5230 return (1); 5231 } 5232 5233 5234 5235 /* 5236 * determine if a destination is "reachable" based upon the addresses bound 5237 * to the current endpoint (e.g. only v4 or v6 currently bound) 5238 */ 5239 /* 5240 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5241 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5242 * types bound as its endpoint 5243 */ 5244 int 5245 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5246 { 5247 struct sctp_inpcb *inp; 5248 int answer; 5249 5250 /* 5251 * No locks here, the TCB, in all cases is already locked and an 5252 * assoc is up. There is either a INP lock by the caller applied (in 5253 * asconf case when deleting an address) or NOT in the HB case, 5254 * however if HB then the INP increment is up and the INP will not 5255 * be removed (on top of the fact that we have a TCB lock). So we 5256 * only want to read the sctp_flags, which is either bound-all or 5257 * not.. no protection needed since once an assoc is up you can't be 5258 * changing your binding. 5259 */ 5260 inp = stcb->sctp_ep; 5261 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5262 /* if bound all, destination is not restricted */ 5263 /* 5264 * RRS: Question during lock work: Is this correct? If you 5265 * are bound-all you still might need to obey the V4--V6 5266 * flags??? IMO this bound-all stuff needs to be removed! 5267 */ 5268 return (1); 5269 } 5270 /* NOTE: all "scope" checks are done when local addresses are added */ 5271 switch (destaddr->sa_family) { 5272 #ifdef INET6 5273 case AF_INET6: 5274 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5275 break; 5276 #endif 5277 #ifdef INET 5278 case AF_INET: 5279 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5280 break; 5281 #endif 5282 default: 5283 /* invalid family, so it's unreachable */ 5284 answer = 0; 5285 break; 5286 } 5287 return (answer); 5288 } 5289 5290 /* 5291 * update the inp_vflags on an endpoint 5292 */ 5293 static void 5294 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5295 { 5296 struct sctp_laddr *laddr; 5297 5298 /* first clear the flag */ 5299 inp->ip_inp.inp.inp_vflag = 0; 5300 /* set the flag based on addresses on the ep list */ 5301 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5302 if (laddr->ifa == NULL) { 5303 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5304 __func__); 5305 continue; 5306 } 5307 5308 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5309 continue; 5310 } 5311 switch (laddr->ifa->address.sa.sa_family) { 5312 #ifdef INET6 5313 case AF_INET6: 5314 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5315 break; 5316 #endif 5317 #ifdef INET 5318 case AF_INET: 5319 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5320 break; 5321 #endif 5322 default: 5323 break; 5324 } 5325 } 5326 } 5327 5328 /* 5329 * Add the address to the endpoint local address list There is nothing to be 5330 * done if we are bound to all addresses 5331 */ 5332 void 5333 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5334 { 5335 struct sctp_laddr *laddr; 5336 struct sctp_tcb *stcb; 5337 int fnd, error = 0; 5338 5339 fnd = 0; 5340 5341 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5342 /* You are already bound to all. You have it already */ 5343 return; 5344 } 5345 #ifdef INET6 5346 if (ifa->address.sa.sa_family == AF_INET6) { 5347 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5348 /* Can't bind a non-useable addr. */ 5349 return; 5350 } 5351 } 5352 #endif 5353 /* first, is it already present? */ 5354 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5355 if (laddr->ifa == ifa) { 5356 fnd = 1; 5357 break; 5358 } 5359 } 5360 5361 if (fnd == 0) { 5362 /* Not in the ep list */ 5363 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5364 if (error != 0) 5365 return; 5366 inp->laddr_count++; 5367 /* update inp_vflag flags */ 5368 switch (ifa->address.sa.sa_family) { 5369 #ifdef INET6 5370 case AF_INET6: 5371 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5372 break; 5373 #endif 5374 #ifdef INET 5375 case AF_INET: 5376 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5377 break; 5378 #endif 5379 default: 5380 break; 5381 } 5382 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5383 sctp_add_local_addr_restricted(stcb, ifa); 5384 } 5385 } 5386 return; 5387 } 5388 5389 5390 /* 5391 * select a new (hopefully reachable) destination net (should only be used 5392 * when we deleted an ep addr that is the only usable source address to reach 5393 * the destination net) 5394 */ 5395 static void 5396 sctp_select_primary_destination(struct sctp_tcb *stcb) 5397 { 5398 struct sctp_nets *net; 5399 5400 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5401 /* for now, we'll just pick the first reachable one we find */ 5402 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5403 continue; 5404 if (sctp_destination_is_reachable(stcb, 5405 (struct sockaddr *)&net->ro._l_addr)) { 5406 /* found a reachable destination */ 5407 stcb->asoc.primary_destination = net; 5408 } 5409 } 5410 /* I can't there from here! ...we're gonna die shortly... */ 5411 } 5412 5413 5414 /* 5415 * Delete the address from the endpoint local address list. There is nothing 5416 * to be done if we are bound to all addresses 5417 */ 5418 void 5419 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5420 { 5421 struct sctp_laddr *laddr; 5422 int fnd; 5423 5424 fnd = 0; 5425 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5426 /* You are already bound to all. You have it already */ 5427 return; 5428 } 5429 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5430 if (laddr->ifa == ifa) { 5431 fnd = 1; 5432 break; 5433 } 5434 } 5435 if (fnd && (inp->laddr_count < 2)) { 5436 /* can't delete unless there are at LEAST 2 addresses */ 5437 return; 5438 } 5439 if (fnd) { 5440 /* 5441 * clean up any use of this address go through our 5442 * associations and clear any last_used_address that match 5443 * this one for each assoc, see if a new primary_destination 5444 * is needed 5445 */ 5446 struct sctp_tcb *stcb; 5447 5448 /* clean up "next_addr_touse" */ 5449 if (inp->next_addr_touse == laddr) 5450 /* delete this address */ 5451 inp->next_addr_touse = NULL; 5452 5453 /* clean up "last_used_address" */ 5454 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5455 struct sctp_nets *net; 5456 5457 SCTP_TCB_LOCK(stcb); 5458 if (stcb->asoc.last_used_address == laddr) 5459 /* delete this address */ 5460 stcb->asoc.last_used_address = NULL; 5461 /* 5462 * Now spin through all the nets and purge any ref 5463 * to laddr 5464 */ 5465 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5466 if (net->ro._s_addr == laddr->ifa) { 5467 /* Yep, purge src address selected */ 5468 sctp_rtentry_t *rt; 5469 5470 /* delete this address if cached */ 5471 rt = net->ro.ro_rt; 5472 if (rt != NULL) { 5473 RTFREE(rt); 5474 net->ro.ro_rt = NULL; 5475 } 5476 sctp_free_ifa(net->ro._s_addr); 5477 net->ro._s_addr = NULL; 5478 net->src_addr_selected = 0; 5479 } 5480 } 5481 SCTP_TCB_UNLOCK(stcb); 5482 } /* for each tcb */ 5483 /* remove it from the ep list */ 5484 sctp_remove_laddr(laddr); 5485 inp->laddr_count--; 5486 /* update inp_vflag flags */ 5487 sctp_update_ep_vflag(inp); 5488 } 5489 return; 5490 } 5491 5492 /* 5493 * Add the address to the TCB local address restricted list. 5494 * This is a "pending" address list (eg. addresses waiting for an 5495 * ASCONF-ACK response) and cannot be used as a valid source address. 5496 */ 5497 void 5498 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5499 { 5500 struct sctp_laddr *laddr; 5501 struct sctpladdr *list; 5502 5503 /* 5504 * Assumes TCB is locked.. and possibly the INP. May need to 5505 * confirm/fix that if we need it and is not the case. 5506 */ 5507 list = &stcb->asoc.sctp_restricted_addrs; 5508 5509 #ifdef INET6 5510 if (ifa->address.sa.sa_family == AF_INET6) { 5511 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5512 /* Can't bind a non-existent addr. */ 5513 return; 5514 } 5515 } 5516 #endif 5517 /* does the address already exist? */ 5518 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5519 if (laddr->ifa == ifa) { 5520 return; 5521 } 5522 } 5523 5524 /* add to the list */ 5525 (void)sctp_insert_laddr(list, ifa, 0); 5526 return; 5527 } 5528 5529 /* 5530 * Remove a local address from the TCB local address restricted list 5531 */ 5532 void 5533 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5534 { 5535 struct sctp_inpcb *inp; 5536 struct sctp_laddr *laddr; 5537 5538 /* 5539 * This is called by asconf work. It is assumed that a) The TCB is 5540 * locked and b) The INP is locked. This is true in as much as I can 5541 * trace through the entry asconf code where I did these locks. 5542 * Again, the ASCONF code is a bit different in that it does lock 5543 * the INP during its work often times. This must be since we don't 5544 * want other proc's looking up things while what they are looking 5545 * up is changing :-D 5546 */ 5547 5548 inp = stcb->sctp_ep; 5549 /* if subset bound and don't allow ASCONF's, can't delete last */ 5550 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5551 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5552 if (stcb->sctp_ep->laddr_count < 2) { 5553 /* can't delete last address */ 5554 return; 5555 } 5556 } 5557 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5558 /* remove the address if it exists */ 5559 if (laddr->ifa == NULL) 5560 continue; 5561 if (laddr->ifa == ifa) { 5562 sctp_remove_laddr(laddr); 5563 return; 5564 } 5565 } 5566 5567 /* address not found! */ 5568 return; 5569 } 5570 5571 /* 5572 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5573 */ 5574 /* sysctl */ 5575 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5576 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5577 5578 5579 5580 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5581 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5582 int *sctp_cpuarry = NULL; 5583 void 5584 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5585 { 5586 /* Queue a packet to a processor for the specified core */ 5587 struct sctp_mcore_queue *qent; 5588 struct sctp_mcore_ctrl *wkq; 5589 int need_wake = 0; 5590 5591 if (sctp_mcore_workers == NULL) { 5592 /* Something went way bad during setup */ 5593 sctp_input_with_port(m, off, 0); 5594 return; 5595 } 5596 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5597 (sizeof(struct sctp_mcore_queue)), 5598 SCTP_M_MCORE); 5599 if (qent == NULL) { 5600 /* This is trouble */ 5601 sctp_input_with_port(m, off, 0); 5602 return; 5603 } 5604 qent->vn = curvnet; 5605 qent->m = m; 5606 qent->off = off; 5607 qent->v6 = 0; 5608 wkq = &sctp_mcore_workers[cpu_to_use]; 5609 SCTP_MCORE_QLOCK(wkq); 5610 5611 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5612 if (wkq->running == 0) { 5613 need_wake = 1; 5614 } 5615 SCTP_MCORE_QUNLOCK(wkq); 5616 if (need_wake) { 5617 wakeup(&wkq->running); 5618 } 5619 } 5620 5621 static void 5622 sctp_mcore_thread(void *arg) 5623 { 5624 5625 struct sctp_mcore_ctrl *wkq; 5626 struct sctp_mcore_queue *qent; 5627 5628 wkq = (struct sctp_mcore_ctrl *)arg; 5629 struct mbuf *m; 5630 int off, v6; 5631 5632 /* Wait for first tickle */ 5633 SCTP_MCORE_LOCK(wkq); 5634 wkq->running = 0; 5635 msleep(&wkq->running, 5636 &wkq->core_mtx, 5637 0, "wait for pkt", 0); 5638 SCTP_MCORE_UNLOCK(wkq); 5639 5640 /* Bind to our cpu */ 5641 thread_lock(curthread); 5642 sched_bind(curthread, wkq->cpuid); 5643 thread_unlock(curthread); 5644 5645 /* Now lets start working */ 5646 SCTP_MCORE_LOCK(wkq); 5647 /* Now grab lock and go */ 5648 for (;;) { 5649 SCTP_MCORE_QLOCK(wkq); 5650 skip_sleep: 5651 wkq->running = 1; 5652 qent = TAILQ_FIRST(&wkq->que); 5653 if (qent) { 5654 TAILQ_REMOVE(&wkq->que, qent, next); 5655 SCTP_MCORE_QUNLOCK(wkq); 5656 CURVNET_SET(qent->vn); 5657 m = qent->m; 5658 off = qent->off; 5659 v6 = qent->v6; 5660 SCTP_FREE(qent, SCTP_M_MCORE); 5661 if (v6 == 0) { 5662 sctp_input_with_port(m, off, 0); 5663 } else { 5664 SCTP_PRINTF("V6 not yet supported\n"); 5665 sctp_m_freem(m); 5666 } 5667 CURVNET_RESTORE(); 5668 SCTP_MCORE_QLOCK(wkq); 5669 } 5670 wkq->running = 0; 5671 if (!TAILQ_EMPTY(&wkq->que)) { 5672 goto skip_sleep; 5673 } 5674 SCTP_MCORE_QUNLOCK(wkq); 5675 msleep(&wkq->running, 5676 &wkq->core_mtx, 5677 0, "wait for pkt", 0); 5678 } 5679 } 5680 5681 static void 5682 sctp_startup_mcore_threads(void) 5683 { 5684 int i, cpu; 5685 5686 if (mp_ncpus == 1) 5687 return; 5688 5689 if (sctp_mcore_workers != NULL) { 5690 /* 5691 * Already been here in some previous vnet? 5692 */ 5693 return; 5694 } 5695 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5696 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5697 SCTP_M_MCORE); 5698 if (sctp_mcore_workers == NULL) { 5699 /* TSNH I hope */ 5700 return; 5701 } 5702 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5703 sizeof(struct sctp_mcore_ctrl))); 5704 /* Init the structures */ 5705 for (i = 0; i <= mp_maxid; i++) { 5706 TAILQ_INIT(&sctp_mcore_workers[i].que); 5707 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5708 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5709 sctp_mcore_workers[i].cpuid = i; 5710 } 5711 if (sctp_cpuarry == NULL) { 5712 SCTP_MALLOC(sctp_cpuarry, int *, 5713 (mp_ncpus * sizeof(int)), 5714 SCTP_M_MCORE); 5715 i = 0; 5716 CPU_FOREACH(cpu) { 5717 sctp_cpuarry[i] = cpu; 5718 i++; 5719 } 5720 } 5721 5722 /* Now start them all */ 5723 CPU_FOREACH(cpu) { 5724 (void)kproc_create(sctp_mcore_thread, 5725 (void *)&sctp_mcore_workers[cpu], 5726 &sctp_mcore_workers[cpu].thread_proc, 5727 RFPROC, 5728 SCTP_KTHREAD_PAGES, 5729 SCTP_MCORE_NAME); 5730 5731 } 5732 } 5733 #endif 5734 5735 void 5736 sctp_pcb_init(void) 5737 { 5738 /* 5739 * SCTP initialization for the PCB structures should be called by 5740 * the sctp_init() function. 5741 */ 5742 int i; 5743 struct timeval tv; 5744 5745 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5746 /* error I was called twice */ 5747 return; 5748 } 5749 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5750 5751 #if defined(SCTP_LOCAL_TRACE_BUF) 5752 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5753 #endif 5754 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5755 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5756 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5757 SCTP_M_MCORE); 5758 #endif 5759 (void)SCTP_GETTIME_TIMEVAL(&tv); 5760 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5761 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5762 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5763 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5764 #else 5765 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5766 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5767 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5768 #endif 5769 /* init the empty list of (All) Endpoints */ 5770 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5771 5772 5773 /* init the hash table of endpoints */ 5774 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5775 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5776 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5777 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5778 &SCTP_BASE_INFO(hashasocmark)); 5779 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5780 &SCTP_BASE_INFO(hashmark)); 5781 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5782 &SCTP_BASE_INFO(hashtcpmark)); 5783 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5784 5785 5786 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5787 &SCTP_BASE_INFO(hashvrfmark)); 5788 5789 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5790 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5791 /* init the zones */ 5792 /* 5793 * FIX ME: Should check for NULL returns, but if it does fail we are 5794 * doomed to panic anyways... add later maybe. 5795 */ 5796 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5797 sizeof(struct sctp_inpcb), maxsockets); 5798 5799 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5800 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5801 5802 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5803 sizeof(struct sctp_laddr), 5804 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5805 5806 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5807 sizeof(struct sctp_nets), 5808 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5809 5810 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5811 sizeof(struct sctp_tmit_chunk), 5812 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5813 5814 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5815 sizeof(struct sctp_queued_to_read), 5816 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5817 5818 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5819 sizeof(struct sctp_stream_queue_pending), 5820 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5821 5822 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5823 sizeof(struct sctp_asconf), 5824 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5825 5826 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5827 sizeof(struct sctp_asconf_ack), 5828 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5829 5830 5831 /* Master Lock INIT for info structure */ 5832 SCTP_INP_INFO_LOCK_INIT(); 5833 SCTP_STATLOG_INIT_LOCK(); 5834 5835 SCTP_IPI_COUNT_INIT(); 5836 SCTP_IPI_ADDR_INIT(); 5837 #ifdef SCTP_PACKET_LOGGING 5838 SCTP_IP_PKTLOG_INIT(); 5839 #endif 5840 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5841 5842 SCTP_WQ_ADDR_INIT(); 5843 /* not sure if we need all the counts */ 5844 SCTP_BASE_INFO(ipi_count_ep) = 0; 5845 /* assoc/tcb zone info */ 5846 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5847 /* local addrlist zone info */ 5848 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5849 /* remote addrlist zone info */ 5850 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5851 /* chunk info */ 5852 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5853 5854 /* socket queue zone info */ 5855 SCTP_BASE_INFO(ipi_count_readq) = 0; 5856 5857 /* stream out queue cont */ 5858 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5859 5860 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5861 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5862 5863 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5864 5865 /* Init the TIMEWAIT list */ 5866 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5867 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5868 } 5869 sctp_startup_iterator(); 5870 5871 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5872 sctp_startup_mcore_threads(); 5873 #endif 5874 5875 /* 5876 * INIT the default VRF which for BSD is the only one, other O/S's 5877 * may have more. But initially they must start with one and then 5878 * add the VRF's as addresses are added. 5879 */ 5880 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5881 } 5882 5883 /* 5884 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5885 */ 5886 void 5887 sctp_pcb_finish(void) 5888 { 5889 struct sctp_vrflist *vrf_bucket; 5890 struct sctp_vrf *vrf, *nvrf; 5891 struct sctp_ifn *ifn, *nifn; 5892 struct sctp_ifa *ifa, *nifa; 5893 struct sctpvtaghead *chain; 5894 struct sctp_tagblock *twait_block, *prev_twait_block; 5895 struct sctp_laddr *wi, *nwi; 5896 int i; 5897 struct sctp_iterator *it, *nit; 5898 5899 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5900 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5901 return; 5902 } 5903 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5904 /* 5905 * In FreeBSD the iterator thread never exits but we do clean up. 5906 * The only way FreeBSD reaches here is if we have VRF's but we 5907 * still add the ifdef to make it compile on old versions. 5908 */ 5909 retry: 5910 SCTP_IPI_ITERATOR_WQ_LOCK(); 5911 /* 5912 * sctp_iterator_worker() might be working on an it entry without 5913 * holding the lock. We won't find it on the list either and 5914 * continue and free/destroy it. While holding the lock, spin, to 5915 * avoid the race condition as sctp_iterator_worker() will have to 5916 * wait to re-aquire the lock. 5917 */ 5918 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5919 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5920 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5921 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5922 DELAY(10); 5923 goto retry; 5924 } 5925 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5926 if (it->vn != curvnet) { 5927 continue; 5928 } 5929 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5930 if (it->function_atend != NULL) { 5931 (*it->function_atend) (it->pointer, it->val); 5932 } 5933 SCTP_FREE(it, SCTP_M_ITER); 5934 } 5935 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5936 SCTP_ITERATOR_LOCK(); 5937 if ((sctp_it_ctl.cur_it) && 5938 (sctp_it_ctl.cur_it->vn == curvnet)) { 5939 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5940 } 5941 SCTP_ITERATOR_UNLOCK(); 5942 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5943 SCTP_WQ_ADDR_LOCK(); 5944 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5945 LIST_REMOVE(wi, sctp_nxt_addr); 5946 SCTP_DECR_LADDR_COUNT(); 5947 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5948 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5949 } 5950 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5951 } 5952 SCTP_WQ_ADDR_UNLOCK(); 5953 5954 /* 5955 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5956 * destroyed first). 5957 */ 5958 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5959 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5960 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5961 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5962 /* free the ifa */ 5963 LIST_REMOVE(ifa, next_bucket); 5964 LIST_REMOVE(ifa, next_ifa); 5965 SCTP_FREE(ifa, SCTP_M_IFA); 5966 } 5967 /* free the ifn */ 5968 LIST_REMOVE(ifn, next_bucket); 5969 LIST_REMOVE(ifn, next_ifn); 5970 SCTP_FREE(ifn, SCTP_M_IFN); 5971 } 5972 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5973 /* free the vrf */ 5974 LIST_REMOVE(vrf, next_vrf); 5975 SCTP_FREE(vrf, SCTP_M_VRF); 5976 } 5977 /* free the vrf hashes */ 5978 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5979 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5980 5981 /* 5982 * free the TIMEWAIT list elements malloc'd in the function 5983 * sctp_add_vtag_to_timewait()... 5984 */ 5985 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5986 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5987 if (!LIST_EMPTY(chain)) { 5988 prev_twait_block = NULL; 5989 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5990 if (prev_twait_block) { 5991 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5992 } 5993 prev_twait_block = twait_block; 5994 } 5995 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5996 } 5997 } 5998 5999 /* free the locks and mutexes */ 6000 #ifdef SCTP_PACKET_LOGGING 6001 SCTP_IP_PKTLOG_DESTROY(); 6002 #endif 6003 SCTP_IPI_ADDR_DESTROY(); 6004 SCTP_STATLOG_DESTROY(); 6005 SCTP_INP_INFO_LOCK_DESTROY(); 6006 6007 SCTP_WQ_ADDR_DESTROY(); 6008 6009 /* Get rid of other stuff too. */ 6010 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6011 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6012 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6013 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6014 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6015 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6016 6017 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6018 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6019 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6020 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6021 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6022 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6023 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6024 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6025 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6026 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6027 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6028 #endif 6029 } 6030 6031 6032 int 6033 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6034 int offset, int limit, 6035 struct sockaddr *src, struct sockaddr *dst, 6036 struct sockaddr *altsa, uint16_t port) 6037 { 6038 /* 6039 * grub through the INIT pulling addresses and loading them to the 6040 * nets structure in the asoc. The from address in the mbuf should 6041 * also be loaded (if it is not already). This routine can be called 6042 * with either INIT or INIT-ACK's as long as the m points to the IP 6043 * packet and the offset points to the beginning of the parameters. 6044 */ 6045 struct sctp_inpcb *inp; 6046 struct sctp_nets *net, *nnet, *net_tmp; 6047 struct sctp_paramhdr *phdr, param_buf; 6048 struct sctp_tcb *stcb_tmp; 6049 uint16_t ptype, plen; 6050 struct sockaddr *sa; 6051 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6052 struct sctp_auth_random *p_random = NULL; 6053 uint16_t random_len = 0; 6054 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6055 struct sctp_auth_hmac_algo *hmacs = NULL; 6056 uint16_t hmacs_len = 0; 6057 uint8_t saw_asconf = 0; 6058 uint8_t saw_asconf_ack = 0; 6059 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6060 struct sctp_auth_chunk_list *chunks = NULL; 6061 uint16_t num_chunks = 0; 6062 sctp_key_t *new_key; 6063 uint32_t keylen; 6064 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6065 uint8_t peer_supports_ecn; 6066 uint8_t peer_supports_prsctp; 6067 uint8_t peer_supports_auth; 6068 uint8_t peer_supports_asconf; 6069 uint8_t peer_supports_asconf_ack; 6070 uint8_t peer_supports_reconfig; 6071 uint8_t peer_supports_nrsack; 6072 uint8_t peer_supports_pktdrop; 6073 uint8_t peer_supports_idata; 6074 #ifdef INET 6075 struct sockaddr_in sin; 6076 #endif 6077 #ifdef INET6 6078 struct sockaddr_in6 sin6; 6079 #endif 6080 6081 /* First get the destination address setup too. */ 6082 #ifdef INET 6083 memset(&sin, 0, sizeof(sin)); 6084 sin.sin_family = AF_INET; 6085 sin.sin_len = sizeof(sin); 6086 sin.sin_port = stcb->rport; 6087 #endif 6088 #ifdef INET6 6089 memset(&sin6, 0, sizeof(sin6)); 6090 sin6.sin6_family = AF_INET6; 6091 sin6.sin6_len = sizeof(struct sockaddr_in6); 6092 sin6.sin6_port = stcb->rport; 6093 #endif 6094 if (altsa) { 6095 sa = altsa; 6096 } else { 6097 sa = src; 6098 } 6099 peer_supports_idata = 0; 6100 peer_supports_ecn = 0; 6101 peer_supports_prsctp = 0; 6102 peer_supports_auth = 0; 6103 peer_supports_asconf = 0; 6104 peer_supports_reconfig = 0; 6105 peer_supports_nrsack = 0; 6106 peer_supports_pktdrop = 0; 6107 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6108 /* mark all addresses that we have currently on the list */ 6109 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6110 } 6111 /* does the source address already exist? if so skip it */ 6112 inp = stcb->sctp_ep; 6113 atomic_add_int(&stcb->asoc.refcnt, 1); 6114 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6115 atomic_add_int(&stcb->asoc.refcnt, -1); 6116 6117 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6118 /* we must add the source address */ 6119 /* no scope set here since we have a tcb already. */ 6120 switch (sa->sa_family) { 6121 #ifdef INET 6122 case AF_INET: 6123 if (stcb->asoc.scope.ipv4_addr_legal) { 6124 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6125 return (-1); 6126 } 6127 } 6128 break; 6129 #endif 6130 #ifdef INET6 6131 case AF_INET6: 6132 if (stcb->asoc.scope.ipv6_addr_legal) { 6133 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6134 return (-2); 6135 } 6136 } 6137 break; 6138 #endif 6139 default: 6140 break; 6141 } 6142 } else { 6143 if (net_tmp != NULL && stcb_tmp == stcb) { 6144 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6145 } else if (stcb_tmp != stcb) { 6146 /* It belongs to another association? */ 6147 if (stcb_tmp) 6148 SCTP_TCB_UNLOCK(stcb_tmp); 6149 return (-3); 6150 } 6151 } 6152 if (stcb->asoc.state == 0) { 6153 /* the assoc was freed? */ 6154 return (-4); 6155 } 6156 /* now we must go through each of the params. */ 6157 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6158 while (phdr) { 6159 ptype = ntohs(phdr->param_type); 6160 plen = ntohs(phdr->param_length); 6161 /* 6162 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6163 * (uint32_t)ptype, (int)plen); 6164 */ 6165 if (offset + plen > limit) { 6166 break; 6167 } 6168 if (plen < sizeof(struct sctp_paramhdr)) { 6169 break; 6170 } 6171 #ifdef INET 6172 if (ptype == SCTP_IPV4_ADDRESS) { 6173 if (stcb->asoc.scope.ipv4_addr_legal) { 6174 struct sctp_ipv4addr_param *p4, p4_buf; 6175 6176 /* ok get the v4 address and check/add */ 6177 phdr = sctp_get_next_param(m, offset, 6178 (struct sctp_paramhdr *)&p4_buf, 6179 sizeof(p4_buf)); 6180 if (plen != sizeof(struct sctp_ipv4addr_param) || 6181 phdr == NULL) { 6182 return (-5); 6183 } 6184 p4 = (struct sctp_ipv4addr_param *)phdr; 6185 sin.sin_addr.s_addr = p4->addr; 6186 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6187 /* Skip multi-cast addresses */ 6188 goto next_param; 6189 } 6190 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6191 (sin.sin_addr.s_addr == INADDR_ANY)) { 6192 goto next_param; 6193 } 6194 sa = (struct sockaddr *)&sin; 6195 inp = stcb->sctp_ep; 6196 atomic_add_int(&stcb->asoc.refcnt, 1); 6197 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6198 dst, stcb); 6199 atomic_add_int(&stcb->asoc.refcnt, -1); 6200 6201 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6202 inp == NULL) { 6203 /* we must add the source address */ 6204 /* 6205 * no scope set since we have a tcb 6206 * already 6207 */ 6208 6209 /* 6210 * we must validate the state again 6211 * here 6212 */ 6213 add_it_now: 6214 if (stcb->asoc.state == 0) { 6215 /* the assoc was freed? */ 6216 return (-7); 6217 } 6218 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6219 return (-8); 6220 } 6221 } else if (stcb_tmp == stcb) { 6222 if (stcb->asoc.state == 0) { 6223 /* the assoc was freed? */ 6224 return (-10); 6225 } 6226 if (net != NULL) { 6227 /* clear flag */ 6228 net->dest_state &= 6229 ~SCTP_ADDR_NOT_IN_ASSOC; 6230 } 6231 } else { 6232 /* 6233 * strange, address is in another 6234 * assoc? straighten out locks. 6235 */ 6236 if (stcb_tmp) { 6237 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6238 struct mbuf *op_err; 6239 char msg[SCTP_DIAG_INFO_LEN]; 6240 6241 /* 6242 * in setup state we 6243 * abort this guy 6244 */ 6245 snprintf(msg, sizeof(msg), 6246 "%s:%d at %s", __FILE__, __LINE__, __func__); 6247 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6248 msg); 6249 sctp_abort_an_association(stcb_tmp->sctp_ep, 6250 stcb_tmp, op_err, 6251 SCTP_SO_NOT_LOCKED); 6252 goto add_it_now; 6253 } 6254 SCTP_TCB_UNLOCK(stcb_tmp); 6255 } 6256 6257 if (stcb->asoc.state == 0) { 6258 /* the assoc was freed? */ 6259 return (-12); 6260 } 6261 return (-13); 6262 } 6263 } 6264 } else 6265 #endif 6266 #ifdef INET6 6267 if (ptype == SCTP_IPV6_ADDRESS) { 6268 if (stcb->asoc.scope.ipv6_addr_legal) { 6269 /* ok get the v6 address and check/add */ 6270 struct sctp_ipv6addr_param *p6, p6_buf; 6271 6272 phdr = sctp_get_next_param(m, offset, 6273 (struct sctp_paramhdr *)&p6_buf, 6274 sizeof(p6_buf)); 6275 if (plen != sizeof(struct sctp_ipv6addr_param) || 6276 phdr == NULL) { 6277 return (-14); 6278 } 6279 p6 = (struct sctp_ipv6addr_param *)phdr; 6280 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6281 sizeof(p6->addr)); 6282 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6283 /* Skip multi-cast addresses */ 6284 goto next_param; 6285 } 6286 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6287 /* 6288 * Link local make no sense without 6289 * scope 6290 */ 6291 goto next_param; 6292 } 6293 sa = (struct sockaddr *)&sin6; 6294 inp = stcb->sctp_ep; 6295 atomic_add_int(&stcb->asoc.refcnt, 1); 6296 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6297 dst, stcb); 6298 atomic_add_int(&stcb->asoc.refcnt, -1); 6299 if (stcb_tmp == NULL && 6300 (inp == stcb->sctp_ep || inp == NULL)) { 6301 /* 6302 * we must validate the state again 6303 * here 6304 */ 6305 add_it_now6: 6306 if (stcb->asoc.state == 0) { 6307 /* the assoc was freed? */ 6308 return (-16); 6309 } 6310 /* 6311 * we must add the address, no scope 6312 * set 6313 */ 6314 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6315 return (-17); 6316 } 6317 } else if (stcb_tmp == stcb) { 6318 /* 6319 * we must validate the state again 6320 * here 6321 */ 6322 if (stcb->asoc.state == 0) { 6323 /* the assoc was freed? */ 6324 return (-19); 6325 } 6326 if (net != NULL) { 6327 /* clear flag */ 6328 net->dest_state &= 6329 ~SCTP_ADDR_NOT_IN_ASSOC; 6330 } 6331 } else { 6332 /* 6333 * strange, address is in another 6334 * assoc? straighten out locks. 6335 */ 6336 if (stcb_tmp) { 6337 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6338 struct mbuf *op_err; 6339 char msg[SCTP_DIAG_INFO_LEN]; 6340 6341 /* 6342 * in setup state we 6343 * abort this guy 6344 */ 6345 snprintf(msg, sizeof(msg), 6346 "%s:%d at %s", __FILE__, __LINE__, __func__); 6347 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6348 msg); 6349 sctp_abort_an_association(stcb_tmp->sctp_ep, 6350 stcb_tmp, op_err, 6351 SCTP_SO_NOT_LOCKED); 6352 goto add_it_now6; 6353 } 6354 SCTP_TCB_UNLOCK(stcb_tmp); 6355 } 6356 if (stcb->asoc.state == 0) { 6357 /* the assoc was freed? */ 6358 return (-21); 6359 } 6360 return (-22); 6361 } 6362 } 6363 } else 6364 #endif 6365 if (ptype == SCTP_ECN_CAPABLE) { 6366 peer_supports_ecn = 1; 6367 } else if (ptype == SCTP_ULP_ADAPTATION) { 6368 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6369 struct sctp_adaptation_layer_indication ai, 6370 *aip; 6371 6372 phdr = sctp_get_next_param(m, offset, 6373 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6374 aip = (struct sctp_adaptation_layer_indication *)phdr; 6375 if (aip) { 6376 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6377 stcb->asoc.adaptation_needed = 1; 6378 } 6379 } 6380 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6381 struct sctp_asconf_addr_param lstore, *fee; 6382 int lptype; 6383 struct sockaddr *lsa = NULL; 6384 #ifdef INET 6385 struct sctp_asconf_addrv4_param *fii; 6386 #endif 6387 6388 if (stcb->asoc.asconf_supported == 0) { 6389 return (-100); 6390 } 6391 if (plen > sizeof(lstore)) { 6392 return (-23); 6393 } 6394 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6395 return (-101); 6396 } 6397 phdr = sctp_get_next_param(m, offset, 6398 (struct sctp_paramhdr *)&lstore, 6399 plen); 6400 if (phdr == NULL) { 6401 return (-24); 6402 } 6403 fee = (struct sctp_asconf_addr_param *)phdr; 6404 lptype = ntohs(fee->addrp.ph.param_type); 6405 switch (lptype) { 6406 #ifdef INET 6407 case SCTP_IPV4_ADDRESS: 6408 if (plen != 6409 sizeof(struct sctp_asconf_addrv4_param)) { 6410 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6411 (int)sizeof(struct sctp_asconf_addrv4_param), 6412 plen); 6413 } else { 6414 fii = (struct sctp_asconf_addrv4_param *)fee; 6415 sin.sin_addr.s_addr = fii->addrp.addr; 6416 lsa = (struct sockaddr *)&sin; 6417 } 6418 break; 6419 #endif 6420 #ifdef INET6 6421 case SCTP_IPV6_ADDRESS: 6422 if (plen != 6423 sizeof(struct sctp_asconf_addr_param)) { 6424 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6425 (int)sizeof(struct sctp_asconf_addr_param), 6426 plen); 6427 } else { 6428 memcpy(sin6.sin6_addr.s6_addr, 6429 fee->addrp.addr, 6430 sizeof(fee->addrp.addr)); 6431 lsa = (struct sockaddr *)&sin6; 6432 } 6433 break; 6434 #endif 6435 default: 6436 break; 6437 } 6438 if (lsa) { 6439 (void)sctp_set_primary_addr(stcb, sa, NULL); 6440 } 6441 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6442 stcb->asoc.peer_supports_nat = 1; 6443 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6444 /* Peer supports pr-sctp */ 6445 peer_supports_prsctp = 1; 6446 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6447 /* A supported extension chunk */ 6448 struct sctp_supported_chunk_types_param *pr_supported; 6449 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6450 int num_ent, i; 6451 6452 if (plen > sizeof(local_store)) { 6453 return (-35); 6454 } 6455 phdr = sctp_get_next_param(m, offset, 6456 (struct sctp_paramhdr *)&local_store, plen); 6457 if (phdr == NULL) { 6458 return (-25); 6459 } 6460 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6461 num_ent = plen - sizeof(struct sctp_paramhdr); 6462 for (i = 0; i < num_ent; i++) { 6463 switch (pr_supported->chunk_types[i]) { 6464 case SCTP_ASCONF: 6465 peer_supports_asconf = 1; 6466 break; 6467 case SCTP_ASCONF_ACK: 6468 peer_supports_asconf_ack = 1; 6469 break; 6470 case SCTP_FORWARD_CUM_TSN: 6471 peer_supports_prsctp = 1; 6472 break; 6473 case SCTP_PACKET_DROPPED: 6474 peer_supports_pktdrop = 1; 6475 break; 6476 case SCTP_NR_SELECTIVE_ACK: 6477 peer_supports_nrsack = 1; 6478 break; 6479 case SCTP_STREAM_RESET: 6480 peer_supports_reconfig = 1; 6481 break; 6482 case SCTP_AUTHENTICATION: 6483 peer_supports_auth = 1; 6484 break; 6485 case SCTP_IDATA: 6486 peer_supports_idata = 1; 6487 break; 6488 default: 6489 /* one I have not learned yet */ 6490 break; 6491 6492 } 6493 } 6494 } else if (ptype == SCTP_RANDOM) { 6495 if (plen > sizeof(random_store)) 6496 break; 6497 if (got_random) { 6498 /* already processed a RANDOM */ 6499 goto next_param; 6500 } 6501 phdr = sctp_get_next_param(m, offset, 6502 (struct sctp_paramhdr *)random_store, 6503 plen); 6504 if (phdr == NULL) 6505 return (-26); 6506 p_random = (struct sctp_auth_random *)phdr; 6507 random_len = plen - sizeof(*p_random); 6508 /* enforce the random length */ 6509 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6510 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6511 return (-27); 6512 } 6513 got_random = 1; 6514 } else if (ptype == SCTP_HMAC_LIST) { 6515 uint16_t num_hmacs; 6516 uint16_t i; 6517 6518 if (plen > sizeof(hmacs_store)) 6519 break; 6520 if (got_hmacs) { 6521 /* already processed a HMAC list */ 6522 goto next_param; 6523 } 6524 phdr = sctp_get_next_param(m, offset, 6525 (struct sctp_paramhdr *)hmacs_store, 6526 plen); 6527 if (phdr == NULL) 6528 return (-28); 6529 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6530 hmacs_len = plen - sizeof(*hmacs); 6531 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6532 /* validate the hmac list */ 6533 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6534 return (-29); 6535 } 6536 if (stcb->asoc.peer_hmacs != NULL) 6537 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6538 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6539 if (stcb->asoc.peer_hmacs != NULL) { 6540 for (i = 0; i < num_hmacs; i++) { 6541 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6542 ntohs(hmacs->hmac_ids[i])); 6543 } 6544 } 6545 got_hmacs = 1; 6546 } else if (ptype == SCTP_CHUNK_LIST) { 6547 int i; 6548 6549 if (plen > sizeof(chunks_store)) 6550 break; 6551 if (got_chklist) { 6552 /* already processed a Chunks list */ 6553 goto next_param; 6554 } 6555 phdr = sctp_get_next_param(m, offset, 6556 (struct sctp_paramhdr *)chunks_store, 6557 plen); 6558 if (phdr == NULL) 6559 return (-30); 6560 chunks = (struct sctp_auth_chunk_list *)phdr; 6561 num_chunks = plen - sizeof(*chunks); 6562 if (stcb->asoc.peer_auth_chunks != NULL) 6563 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6564 else 6565 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6566 for (i = 0; i < num_chunks; i++) { 6567 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6568 stcb->asoc.peer_auth_chunks); 6569 /* record asconf/asconf-ack if listed */ 6570 if (chunks->chunk_types[i] == SCTP_ASCONF) 6571 saw_asconf = 1; 6572 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6573 saw_asconf_ack = 1; 6574 6575 } 6576 got_chklist = 1; 6577 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6578 (ptype == SCTP_STATE_COOKIE) || 6579 (ptype == SCTP_UNRECOG_PARAM) || 6580 (ptype == SCTP_COOKIE_PRESERVE) || 6581 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6582 (ptype == SCTP_ADD_IP_ADDRESS) || 6583 (ptype == SCTP_DEL_IP_ADDRESS) || 6584 (ptype == SCTP_ERROR_CAUSE_IND) || 6585 (ptype == SCTP_SUCCESS_REPORT)) { 6586 /* don't care */ ; 6587 } else { 6588 if ((ptype & 0x8000) == 0x0000) { 6589 /* 6590 * must stop processing the rest of the 6591 * param's. Any report bits were handled 6592 * with the call to 6593 * sctp_arethere_unrecognized_parameters() 6594 * when the INIT or INIT-ACK was first seen. 6595 */ 6596 break; 6597 } 6598 } 6599 6600 next_param: 6601 offset += SCTP_SIZE32(plen); 6602 if (offset >= limit) { 6603 break; 6604 } 6605 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6606 sizeof(param_buf)); 6607 } 6608 /* Now check to see if we need to purge any addresses */ 6609 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6610 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6611 SCTP_ADDR_NOT_IN_ASSOC) { 6612 /* This address has been removed from the asoc */ 6613 /* remove and free it */ 6614 stcb->asoc.numnets--; 6615 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6616 sctp_free_remote_addr(net); 6617 if (net == stcb->asoc.primary_destination) { 6618 stcb->asoc.primary_destination = NULL; 6619 sctp_select_primary_destination(stcb); 6620 } 6621 } 6622 } 6623 if ((stcb->asoc.ecn_supported == 1) && 6624 (peer_supports_ecn == 0)) { 6625 stcb->asoc.ecn_supported = 0; 6626 } 6627 if ((stcb->asoc.prsctp_supported == 1) && 6628 (peer_supports_prsctp == 0)) { 6629 stcb->asoc.prsctp_supported = 0; 6630 } 6631 if ((stcb->asoc.auth_supported == 1) && 6632 ((peer_supports_auth == 0) || 6633 (got_random == 0) || (got_hmacs == 0))) { 6634 stcb->asoc.auth_supported = 0; 6635 } 6636 if ((stcb->asoc.asconf_supported == 1) && 6637 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6638 (stcb->asoc.auth_supported == 0) || 6639 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6640 stcb->asoc.asconf_supported = 0; 6641 } 6642 if ((stcb->asoc.reconfig_supported == 1) && 6643 (peer_supports_reconfig == 0)) { 6644 stcb->asoc.reconfig_supported = 0; 6645 } 6646 if ((stcb->asoc.idata_supported == 1) && 6647 (peer_supports_idata == 0)) { 6648 stcb->asoc.idata_supported = 0; 6649 } 6650 if ((stcb->asoc.nrsack_supported == 1) && 6651 (peer_supports_nrsack == 0)) { 6652 stcb->asoc.nrsack_supported = 0; 6653 } 6654 if ((stcb->asoc.pktdrop_supported == 1) && 6655 (peer_supports_pktdrop == 0)) { 6656 stcb->asoc.pktdrop_supported = 0; 6657 } 6658 /* validate authentication required parameters */ 6659 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6660 /* peer does not support auth but sent a chunks list? */ 6661 return (-31); 6662 } 6663 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6664 /* peer supports asconf but not auth? */ 6665 return (-32); 6666 } else if ((peer_supports_asconf == 1) && 6667 (peer_supports_auth == 1) && 6668 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6669 return (-33); 6670 } 6671 /* concatenate the full random key */ 6672 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6673 if (chunks != NULL) { 6674 keylen += sizeof(*chunks) + num_chunks; 6675 } 6676 new_key = sctp_alloc_key(keylen); 6677 if (new_key != NULL) { 6678 /* copy in the RANDOM */ 6679 if (p_random != NULL) { 6680 keylen = sizeof(*p_random) + random_len; 6681 memcpy(new_key->key, p_random, keylen); 6682 } else { 6683 keylen = 0; 6684 } 6685 /* append in the AUTH chunks */ 6686 if (chunks != NULL) { 6687 memcpy(new_key->key + keylen, chunks, 6688 sizeof(*chunks) + num_chunks); 6689 keylen += sizeof(*chunks) + num_chunks; 6690 } 6691 /* append in the HMACs */ 6692 if (hmacs != NULL) { 6693 memcpy(new_key->key + keylen, hmacs, 6694 sizeof(*hmacs) + hmacs_len); 6695 } 6696 } else { 6697 /* failed to get memory for the key */ 6698 return (-34); 6699 } 6700 if (stcb->asoc.authinfo.peer_random != NULL) 6701 sctp_free_key(stcb->asoc.authinfo.peer_random); 6702 stcb->asoc.authinfo.peer_random = new_key; 6703 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6704 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6705 6706 return (0); 6707 } 6708 6709 int 6710 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6711 struct sctp_nets *net) 6712 { 6713 /* make sure the requested primary address exists in the assoc */ 6714 if (net == NULL && sa) 6715 net = sctp_findnet(stcb, sa); 6716 6717 if (net == NULL) { 6718 /* didn't find the requested primary address! */ 6719 return (-1); 6720 } else { 6721 /* set the primary address */ 6722 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6723 /* Must be confirmed, so queue to set */ 6724 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6725 return (0); 6726 } 6727 stcb->asoc.primary_destination = net; 6728 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6729 sctp_free_remote_addr(stcb->asoc.alternate); 6730 stcb->asoc.alternate = NULL; 6731 } 6732 net = TAILQ_FIRST(&stcb->asoc.nets); 6733 if (net != stcb->asoc.primary_destination) { 6734 /* 6735 * first one on the list is NOT the primary 6736 * sctp_cmpaddr() is much more efficient if the 6737 * primary is the first on the list, make it so. 6738 */ 6739 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6740 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6741 } 6742 return (0); 6743 } 6744 } 6745 6746 int 6747 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6748 { 6749 /* 6750 * This function serves two purposes. It will see if a TAG can be 6751 * re-used and return 1 for yes it is ok and 0 for don't use that 6752 * tag. A secondary function it will do is purge out old tags that 6753 * can be removed. 6754 */ 6755 struct sctpvtaghead *chain; 6756 struct sctp_tagblock *twait_block; 6757 struct sctpasochead *head; 6758 struct sctp_tcb *stcb; 6759 int i; 6760 6761 SCTP_INP_INFO_RLOCK(); 6762 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6763 SCTP_BASE_INFO(hashasocmark))]; 6764 LIST_FOREACH(stcb, head, sctp_asocs) { 6765 /* 6766 * We choose not to lock anything here. TCB's can't be 6767 * removed since we have the read lock, so they can't be 6768 * freed on us, same thing for the INP. I may be wrong with 6769 * this assumption, but we will go with it for now :-) 6770 */ 6771 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6772 continue; 6773 } 6774 if (stcb->asoc.my_vtag == tag) { 6775 /* candidate */ 6776 if (stcb->rport != rport) { 6777 continue; 6778 } 6779 if (stcb->sctp_ep->sctp_lport != lport) { 6780 continue; 6781 } 6782 /* Its a used tag set */ 6783 SCTP_INP_INFO_RUNLOCK(); 6784 return (0); 6785 } 6786 } 6787 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6788 /* Now what about timed wait ? */ 6789 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6790 /* 6791 * Block(s) are present, lets see if we have this tag in the 6792 * list 6793 */ 6794 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6795 if (twait_block->vtag_block[i].v_tag == 0) { 6796 /* not used */ 6797 continue; 6798 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6799 now->tv_sec) { 6800 /* Audit expires this guy */ 6801 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6802 twait_block->vtag_block[i].v_tag = 0; 6803 twait_block->vtag_block[i].lport = 0; 6804 twait_block->vtag_block[i].rport = 0; 6805 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6806 (twait_block->vtag_block[i].lport == lport) && 6807 (twait_block->vtag_block[i].rport == rport)) { 6808 /* Bad tag, sorry :< */ 6809 SCTP_INP_INFO_RUNLOCK(); 6810 return (0); 6811 } 6812 } 6813 } 6814 SCTP_INP_INFO_RUNLOCK(); 6815 return (1); 6816 } 6817 6818 static void 6819 sctp_drain_mbufs(struct sctp_tcb *stcb) 6820 { 6821 /* 6822 * We must hunt this association for MBUF's past the cumack (i.e. 6823 * out of order data that we can renege on). 6824 */ 6825 struct sctp_association *asoc; 6826 struct sctp_tmit_chunk *chk, *nchk; 6827 uint32_t cumulative_tsn_p1; 6828 struct sctp_queued_to_read *control, *ncontrol; 6829 int cnt, strmat; 6830 uint32_t gap, i; 6831 int fnd = 0; 6832 6833 /* We look for anything larger than the cum-ack + 1 */ 6834 6835 asoc = &stcb->asoc; 6836 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6837 /* none we can reneg on. */ 6838 return; 6839 } 6840 SCTP_STAT_INCR(sctps_protocol_drains_done); 6841 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6842 cnt = 0; 6843 /* Ok that was fun, now we will drain all the inbound streams? */ 6844 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6845 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6846 #ifdef INVARIANTS 6847 if (control->on_strm_q != SCTP_ON_ORDERED) { 6848 panic("Huh control: %p on_q: %d -- not ordered?", 6849 control, control->on_strm_q); 6850 } 6851 #endif 6852 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6853 /* Yep it is above cum-ack */ 6854 cnt++; 6855 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6856 KASSERT(control->length > 0, ("control has zero length")); 6857 if (asoc->size_on_all_streams >= control->length) { 6858 asoc->size_on_all_streams -= control->length; 6859 } else { 6860 #ifdef INVARIANTS 6861 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6862 #else 6863 asoc->size_on_all_streams = 0; 6864 #endif 6865 } 6866 sctp_ucount_decr(asoc->cnt_on_all_streams); 6867 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6868 if (control->on_read_q) { 6869 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6870 control->on_read_q = 0; 6871 } 6872 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6873 control->on_strm_q = 0; 6874 if (control->data) { 6875 sctp_m_freem(control->data); 6876 control->data = NULL; 6877 } 6878 sctp_free_remote_addr(control->whoFrom); 6879 /* Now its reasm? */ 6880 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6881 cnt++; 6882 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6883 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6884 if (asoc->size_on_reasm_queue >= chk->send_size) { 6885 asoc->size_on_reasm_queue -= chk->send_size; 6886 } else { 6887 #ifdef INVARIANTS 6888 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6889 #else 6890 asoc->size_on_reasm_queue = 0; 6891 #endif 6892 } 6893 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6894 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6895 TAILQ_REMOVE(&control->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, control); 6903 } 6904 } 6905 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6906 #ifdef INVARIANTS 6907 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6908 panic("Huh control: %p on_q: %d -- not unordered?", 6909 control, control->on_strm_q); 6910 } 6911 #endif 6912 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6913 /* Yep it is above cum-ack */ 6914 cnt++; 6915 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6916 KASSERT(control->length > 0, ("control has zero length")); 6917 if (asoc->size_on_all_streams >= control->length) { 6918 asoc->size_on_all_streams -= control->length; 6919 } else { 6920 #ifdef INVARIANTS 6921 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6922 #else 6923 asoc->size_on_all_streams = 0; 6924 #endif 6925 } 6926 sctp_ucount_decr(asoc->cnt_on_all_streams); 6927 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6928 if (control->on_read_q) { 6929 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6930 control->on_read_q = 0; 6931 } 6932 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6933 control->on_strm_q = 0; 6934 if (control->data) { 6935 sctp_m_freem(control->data); 6936 control->data = NULL; 6937 } 6938 sctp_free_remote_addr(control->whoFrom); 6939 /* Now its reasm? */ 6940 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6941 cnt++; 6942 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6943 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6944 if (asoc->size_on_reasm_queue >= chk->send_size) { 6945 asoc->size_on_reasm_queue -= chk->send_size; 6946 } else { 6947 #ifdef INVARIANTS 6948 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6949 #else 6950 asoc->size_on_reasm_queue = 0; 6951 #endif 6952 } 6953 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6954 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6955 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6956 if (chk->data) { 6957 sctp_m_freem(chk->data); 6958 chk->data = NULL; 6959 } 6960 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6961 } 6962 sctp_free_a_readq(stcb, control); 6963 } 6964 } 6965 } 6966 if (cnt) { 6967 /* We must back down to see what the new highest is */ 6968 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6969 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6970 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6971 asoc->highest_tsn_inside_map = i; 6972 fnd = 1; 6973 break; 6974 } 6975 } 6976 if (!fnd) { 6977 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6978 } 6979 6980 /* 6981 * Question, should we go through the delivery queue? The 6982 * only reason things are on here is the app not reading OR 6983 * a p-d-api up. An attacker COULD send enough in to 6984 * initiate the PD-API and then send a bunch of stuff to 6985 * other streams... these would wind up on the delivery 6986 * queue.. and then we would not get to them. But in order 6987 * to do this I then have to back-track and un-deliver 6988 * sequence numbers in streams.. el-yucko. I think for now 6989 * we will NOT look at the delivery queue and leave it to be 6990 * something to consider later. An alternative would be to 6991 * abort the P-D-API with a notification and then deliver 6992 * the data.... Or another method might be to keep track of 6993 * how many times the situation occurs and if we see a 6994 * possible attack underway just abort the association. 6995 */ 6996 #ifdef SCTP_DEBUG 6997 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6998 #endif 6999 /* 7000 * Now do we need to find a new 7001 * asoc->highest_tsn_inside_map? 7002 */ 7003 asoc->last_revoke_count = cnt; 7004 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 7005 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 7006 /* sa_ignore NO_NULL_CHK */ 7007 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 7008 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 7009 } 7010 /* 7011 * Another issue, in un-setting the TSN's in the mapping array we 7012 * DID NOT adjust the highest_tsn marker. This will cause one of 7013 * two things to occur. It may cause us to do extra work in checking 7014 * for our mapping array movement. More importantly it may cause us 7015 * to SACK every datagram. This may not be a bad thing though since 7016 * we will recover once we get our cum-ack above and all this stuff 7017 * we dumped recovered. 7018 */ 7019 } 7020 7021 void 7022 sctp_drain() 7023 { 7024 /* 7025 * We must walk the PCB lists for ALL associations here. The system 7026 * is LOW on MBUF's and needs help. This is where reneging will 7027 * occur. We really hope this does NOT happen! 7028 */ 7029 VNET_ITERATOR_DECL(vnet_iter); 7030 VNET_LIST_RLOCK_NOSLEEP(); 7031 VNET_FOREACH(vnet_iter) { 7032 CURVNET_SET(vnet_iter); 7033 struct sctp_inpcb *inp; 7034 struct sctp_tcb *stcb; 7035 7036 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7037 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7038 #ifdef VIMAGE 7039 continue; 7040 #else 7041 return; 7042 #endif 7043 } 7044 SCTP_INP_INFO_RLOCK(); 7045 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7046 /* For each endpoint */ 7047 SCTP_INP_RLOCK(inp); 7048 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7049 /* For each association */ 7050 SCTP_TCB_LOCK(stcb); 7051 sctp_drain_mbufs(stcb); 7052 SCTP_TCB_UNLOCK(stcb); 7053 } 7054 SCTP_INP_RUNLOCK(inp); 7055 } 7056 SCTP_INP_INFO_RUNLOCK(); 7057 CURVNET_RESTORE(); 7058 } 7059 VNET_LIST_RUNLOCK_NOSLEEP(); 7060 } 7061 7062 /* 7063 * start a new iterator 7064 * iterates through all endpoints and associations based on the pcb_state 7065 * flags and asoc_state. "af" (mandatory) is executed for all matching 7066 * assocs and "ef" (optional) is executed when the iterator completes. 7067 * "inpf" (optional) is executed for each new endpoint as it is being 7068 * iterated through. inpe (optional) is called when the inp completes 7069 * its way through all the stcbs. 7070 */ 7071 int 7072 sctp_initiate_iterator(inp_func inpf, 7073 asoc_func af, 7074 inp_func inpe, 7075 uint32_t pcb_state, 7076 uint32_t pcb_features, 7077 uint32_t asoc_state, 7078 void *argp, 7079 uint32_t argi, 7080 end_func ef, 7081 struct sctp_inpcb *s_inp, 7082 uint8_t chunk_output_off) 7083 { 7084 struct sctp_iterator *it = NULL; 7085 7086 if (af == NULL) { 7087 return (-1); 7088 } 7089 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7090 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7091 SCTP_BASE_VAR(sctp_pcb_initialized)); 7092 return (-1); 7093 } 7094 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7095 SCTP_M_ITER); 7096 if (it == NULL) { 7097 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7098 return (-1); 7099 } 7100 memset(it, 0, sizeof(*it)); 7101 it->function_assoc = af; 7102 it->function_inp = inpf; 7103 if (inpf) 7104 it->done_current_ep = 0; 7105 else 7106 it->done_current_ep = 1; 7107 it->function_atend = ef; 7108 it->pointer = argp; 7109 it->val = argi; 7110 it->pcb_flags = pcb_state; 7111 it->pcb_features = pcb_features; 7112 it->asoc_state = asoc_state; 7113 it->function_inp_end = inpe; 7114 it->no_chunk_output = chunk_output_off; 7115 it->vn = curvnet; 7116 if (s_inp) { 7117 /* Assume lock is held here */ 7118 it->inp = s_inp; 7119 SCTP_INP_INCR_REF(it->inp); 7120 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7121 } else { 7122 SCTP_INP_INFO_RLOCK(); 7123 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7124 if (it->inp) { 7125 SCTP_INP_INCR_REF(it->inp); 7126 } 7127 SCTP_INP_INFO_RUNLOCK(); 7128 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7129 7130 } 7131 SCTP_IPI_ITERATOR_WQ_LOCK(); 7132 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7133 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7134 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7135 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7136 SCTP_FREE(it, SCTP_M_ITER); 7137 return (-1); 7138 } 7139 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7140 if (sctp_it_ctl.iterator_running == 0) { 7141 sctp_wakeup_iterator(); 7142 } 7143 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7144 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7145 return (0); 7146 }
Cache object: adf61ed89f27307fa41768b74cd73c61
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