1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <sys/proc.h> 40 #include <netinet/sctp_var.h> 41 #include <netinet/sctp_sysctl.h> 42 #include <netinet/sctp_pcb.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp.h> 45 #include <netinet/sctp_header.h> 46 #include <netinet/sctp_asconf.h> 47 #include <netinet/sctp_output.h> 48 #include <netinet/sctp_timer.h> 49 #include <netinet/sctp_bsd_addr.h> 50 #if defined(INET) || defined(INET6) 51 #include <netinet/udp.h> 52 #endif 53 #ifdef INET6 54 #include <netinet6/ip6_var.h> 55 #endif 56 #include <sys/sched.h> 57 #include <sys/smp.h> 58 #include <sys/unistd.h> 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 #endif 79 80 void 81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 82 { 83 /* 84 * We really don't need to lock this, but I will just because it 85 * does not hurt. 86 */ 87 SCTP_INP_INFO_RLOCK(); 88 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 89 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 90 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 91 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 92 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 93 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 94 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 95 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 96 SCTP_INP_INFO_RUNLOCK(); 97 } 98 99 /*- 100 * Addresses are added to VRF's (Virtual Router's). For BSD we 101 * have only the default VRF 0. We maintain a hash list of 102 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 103 * these has a list of addresses. When we add a new address 104 * to a VRF we lookup the ifn/ifn_index, if the ifn does 105 * not exist we create it and add it to the list of IFN's 106 * within the VRF. Once we have the sctp_ifn, we add the 107 * address to the list. So we look something like: 108 * 109 * hash-vrf-table 110 * vrf-> ifn-> ifn -> ifn 111 * vrf | 112 * ... +--ifa-> ifa -> ifa 113 * vrf 114 * 115 * We keep these separate lists since the SCTP subsystem will 116 * point to these from its source address selection nets structure. 117 * When an address is deleted it does not happen right away on 118 * the SCTP side, it gets scheduled. What we do when a 119 * delete happens is immediately remove the address from 120 * the master list and decrement the refcount. As our 121 * addip iterator works through and frees the src address 122 * selection pointing to the sctp_ifa, eventually the refcount 123 * will reach 0 and we will delete it. Note that it is assumed 124 * that any locking on system level ifn/ifa is done at the 125 * caller of these functions and these routines will only 126 * lock the SCTP structures as they add or delete things. 127 * 128 * Other notes on VRF concepts. 129 * - An endpoint can be in multiple VRF's 130 * - An association lives within a VRF and only one VRF. 131 * - Any incoming packet we can deduce the VRF for by 132 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 133 * - Any downward send call or connect call must supply the 134 * VRF via ancillary data or via some sort of set default 135 * VRF socket option call (again for BSD no brainer since 136 * the VRF is always 0). 137 * - An endpoint may add multiple VRF's to it. 138 * - Listening sockets can accept associations in any 139 * of the VRF's they are in but the assoc will end up 140 * in only one VRF (gotten from the packet or connect/send). 141 * 142 */ 143 144 struct sctp_vrf * 145 sctp_allocate_vrf(int vrf_id) 146 { 147 struct sctp_vrf *vrf = NULL; 148 struct sctp_vrflist *bucket; 149 150 /* First allocate the VRF structure */ 151 vrf = sctp_find_vrf(vrf_id); 152 if (vrf) { 153 /* Already allocated */ 154 return (vrf); 155 } 156 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 157 SCTP_M_VRF); 158 if (vrf == NULL) { 159 /* No memory */ 160 #ifdef INVARIANTS 161 panic("No memory for VRF:%d", vrf_id); 162 #endif 163 return (NULL); 164 } 165 /* setup the VRF */ 166 memset(vrf, 0, sizeof(struct sctp_vrf)); 167 vrf->vrf_id = vrf_id; 168 LIST_INIT(&vrf->ifnlist); 169 vrf->total_ifa_count = 0; 170 vrf->refcount = 0; 171 /* now also setup table ids */ 172 SCTP_INIT_VRF_TABLEID(vrf); 173 /* Init the HASH of addresses */ 174 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 175 &vrf->vrf_addr_hashmark); 176 if (vrf->vrf_addr_hash == NULL) { 177 /* No memory */ 178 #ifdef INVARIANTS 179 panic("No memory for VRF:%d", vrf_id); 180 #endif 181 SCTP_FREE(vrf, SCTP_M_VRF); 182 return (NULL); 183 } 184 185 /* Add it to the hash table */ 186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 187 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 189 return (vrf); 190 } 191 192 struct sctp_ifn * 193 sctp_find_ifn(void *ifn, uint32_t ifn_index) 194 { 195 struct sctp_ifn *sctp_ifnp; 196 struct sctp_ifnlist *hash_ifn_head; 197 198 /* 199 * We assume the lock is held for the addresses if that's wrong 200 * problems could occur :-) 201 */ 202 SCTP_IPI_ADDR_LOCK_ASSERT(); 203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 205 if (sctp_ifnp->ifn_index == ifn_index) { 206 return (sctp_ifnp); 207 } 208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 209 return (sctp_ifnp); 210 } 211 } 212 return (NULL); 213 } 214 215 struct sctp_vrf * 216 sctp_find_vrf(uint32_t vrf_id) 217 { 218 struct sctp_vrflist *bucket; 219 struct sctp_vrf *liste; 220 221 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 222 LIST_FOREACH(liste, bucket, next_vrf) { 223 if (vrf_id == liste->vrf_id) { 224 return (liste); 225 } 226 } 227 return (NULL); 228 } 229 230 void 231 sctp_free_vrf(struct sctp_vrf *vrf) 232 { 233 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 234 if (vrf->vrf_addr_hash) { 235 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 236 vrf->vrf_addr_hash = NULL; 237 } 238 /* We zero'd the count */ 239 LIST_REMOVE(vrf, next_vrf); 240 SCTP_FREE(vrf, SCTP_M_VRF); 241 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 242 } 243 } 244 245 void 246 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 247 { 248 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 249 /* We zero'd the count */ 250 if (sctp_ifnp->vrf) { 251 sctp_free_vrf(sctp_ifnp->vrf); 252 } 253 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 254 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 255 } 256 } 257 258 void 259 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 260 { 261 struct sctp_ifn *sctp_ifnp; 262 263 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 264 if (sctp_ifnp != NULL) { 265 sctp_ifnp->ifn_mtu = mtu; 266 } 267 } 268 269 void 270 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 271 { 272 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 273 /* We zero'd the count */ 274 if (sctp_ifap->ifn_p) { 275 sctp_free_ifn(sctp_ifap->ifn_p); 276 } 277 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 278 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 279 } 280 } 281 282 static void 283 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 284 { 285 struct sctp_ifn *found; 286 287 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 288 if (found == NULL) { 289 /* Not in the list.. sorry */ 290 return; 291 } 292 if (hold_addr_lock == 0) { 293 SCTP_IPI_ADDR_WLOCK(); 294 } else { 295 SCTP_IPI_ADDR_WLOCK_ASSERT(); 296 } 297 LIST_REMOVE(sctp_ifnp, next_bucket); 298 LIST_REMOVE(sctp_ifnp, next_ifn); 299 if (hold_addr_lock == 0) { 300 SCTP_IPI_ADDR_WUNLOCK(); 301 } 302 /* Take away the reference, and possibly free it */ 303 sctp_free_ifn(sctp_ifnp); 304 } 305 306 void 307 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 308 const char *if_name, uint32_t ifn_index) 309 { 310 struct sctp_vrf *vrf; 311 struct sctp_ifa *sctp_ifap; 312 313 SCTP_IPI_ADDR_RLOCK(); 314 vrf = sctp_find_vrf(vrf_id); 315 if (vrf == NULL) { 316 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 317 goto out; 318 } 319 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 320 if (sctp_ifap == NULL) { 321 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 322 goto out; 323 } 324 if (sctp_ifap->ifn_p == NULL) { 325 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 326 goto out; 327 } 328 if (if_name) { 329 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 331 sctp_ifap->ifn_p->ifn_name, if_name); 332 goto out; 333 } 334 } else { 335 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 337 sctp_ifap->ifn_p->ifn_index, ifn_index); 338 goto out; 339 } 340 } 341 342 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 343 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 344 out: 345 SCTP_IPI_ADDR_RUNLOCK(); 346 } 347 348 void 349 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 350 const char *if_name, uint32_t ifn_index) 351 { 352 struct sctp_vrf *vrf; 353 struct sctp_ifa *sctp_ifap; 354 355 SCTP_IPI_ADDR_RLOCK(); 356 vrf = sctp_find_vrf(vrf_id); 357 if (vrf == NULL) { 358 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 359 goto out; 360 } 361 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 362 if (sctp_ifap == NULL) { 363 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 364 goto out; 365 } 366 if (sctp_ifap->ifn_p == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 368 goto out; 369 } 370 if (if_name) { 371 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 372 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 373 sctp_ifap->ifn_p->ifn_name, if_name); 374 goto out; 375 } 376 } else { 377 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 379 sctp_ifap->ifn_p->ifn_index, ifn_index); 380 goto out; 381 } 382 } 383 384 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 385 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 386 out: 387 SCTP_IPI_ADDR_RUNLOCK(); 388 } 389 390 /*- 391 * Add an ifa to an ifn. 392 * Register the interface as necessary. 393 * NOTE: ADDR write lock MUST be held. 394 */ 395 static void 396 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 397 { 398 int ifa_af; 399 400 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 401 sctp_ifap->ifn_p = sctp_ifnp; 402 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 403 /* update address counts */ 404 sctp_ifnp->ifa_count++; 405 ifa_af = sctp_ifap->address.sa.sa_family; 406 switch (ifa_af) { 407 #ifdef INET 408 case AF_INET: 409 sctp_ifnp->num_v4++; 410 break; 411 #endif 412 #ifdef INET6 413 case AF_INET6: 414 sctp_ifnp->num_v6++; 415 break; 416 #endif 417 default: 418 break; 419 } 420 if (sctp_ifnp->ifa_count == 1) { 421 /* register the new interface */ 422 sctp_ifnp->registered_af = ifa_af; 423 } 424 } 425 426 /*- 427 * Remove an ifa from its ifn. 428 * If no more addresses exist, remove the ifn too. Otherwise, re-register 429 * the interface based on the remaining address families left. 430 * NOTE: ADDR write lock MUST be held. 431 */ 432 static void 433 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 434 { 435 LIST_REMOVE(sctp_ifap, next_ifa); 436 if (sctp_ifap->ifn_p) { 437 /* update address counts */ 438 sctp_ifap->ifn_p->ifa_count--; 439 switch (sctp_ifap->address.sa.sa_family) { 440 #ifdef INET 441 case AF_INET: 442 sctp_ifap->ifn_p->num_v4--; 443 break; 444 #endif 445 #ifdef INET6 446 case AF_INET6: 447 sctp_ifap->ifn_p->num_v6--; 448 break; 449 #endif 450 default: 451 break; 452 } 453 454 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 455 /* remove the ifn, possibly freeing it */ 456 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 457 } else { 458 /* re-register address family type, if needed */ 459 if ((sctp_ifap->ifn_p->num_v6 == 0) && 460 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 461 sctp_ifap->ifn_p->registered_af = AF_INET; 462 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 463 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 464 sctp_ifap->ifn_p->registered_af = AF_INET6; 465 } 466 /* free the ifn refcount */ 467 sctp_free_ifn(sctp_ifap->ifn_p); 468 } 469 sctp_ifap->ifn_p = NULL; 470 } 471 } 472 473 struct sctp_ifa * 474 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 475 uint32_t ifn_type, const char *if_name, void *ifa, 476 struct sockaddr *addr, uint32_t ifa_flags, 477 int dynamic_add) 478 { 479 struct sctp_vrf *vrf; 480 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp; 481 struct sctp_ifa *sctp_ifap, *new_sctp_ifap; 482 struct sctp_ifalist *hash_addr_head; 483 struct sctp_ifnlist *hash_ifn_head; 484 uint32_t hash_of_addr; 485 int new_ifn_af = 0; 486 487 #ifdef SCTP_DEBUG 488 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 489 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 490 #endif 491 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *, 492 sizeof(struct sctp_ifn), SCTP_M_IFN); 493 if (new_sctp_ifnp == NULL) { 494 #ifdef INVARIANTS 495 panic("No memory for IFN"); 496 #endif 497 return (NULL); 498 } 499 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 500 if (new_sctp_ifap == NULL) { 501 #ifdef INVARIANTS 502 panic("No memory for IFA"); 503 #endif 504 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 505 return (NULL); 506 } 507 508 SCTP_IPI_ADDR_WLOCK(); 509 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 510 if (sctp_ifnp) { 511 vrf = sctp_ifnp->vrf; 512 } else { 513 vrf = sctp_find_vrf(vrf_id); 514 if (vrf == NULL) { 515 vrf = sctp_allocate_vrf(vrf_id); 516 if (vrf == NULL) { 517 SCTP_IPI_ADDR_WUNLOCK(); 518 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 519 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 520 return (NULL); 521 } 522 } 523 } 524 if (sctp_ifnp == NULL) { 525 /* 526 * build one and add it, can't hold lock until after malloc 527 * done though. 528 */ 529 sctp_ifnp = new_sctp_ifnp; 530 new_sctp_ifnp = NULL; 531 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 532 sctp_ifnp->ifn_index = ifn_index; 533 sctp_ifnp->ifn_p = ifn; 534 sctp_ifnp->ifn_type = ifn_type; 535 sctp_ifnp->refcount = 0; 536 sctp_ifnp->vrf = vrf; 537 atomic_add_int(&vrf->refcount, 1); 538 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 539 if (if_name != NULL) { 540 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 541 } else { 542 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 543 } 544 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 545 LIST_INIT(&sctp_ifnp->ifalist); 546 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 547 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 548 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 549 new_ifn_af = 1; 550 } 551 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 552 if (sctp_ifap) { 553 /* Hmm, it already exists? */ 554 if ((sctp_ifap->ifn_p) && 555 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 556 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 557 sctp_ifap->ifn_p->ifn_name, ifn_index, 558 (void *)sctp_ifap); 559 if (new_ifn_af) { 560 /* Remove the created one that we don't want */ 561 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 562 } 563 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 564 /* easy to solve, just switch back to active */ 565 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 566 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 567 sctp_ifap->ifn_p = sctp_ifnp; 568 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 569 } 570 exit_stage_left: 571 SCTP_IPI_ADDR_WUNLOCK(); 572 if (new_sctp_ifnp != NULL) { 573 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 574 } 575 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 576 return (sctp_ifap); 577 } else { 578 if (sctp_ifap->ifn_p) { 579 /* 580 * The last IFN gets the address, remove the 581 * old one 582 */ 583 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 584 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 585 sctp_ifap->ifn_p->ifn_index, if_name, 586 ifn_index); 587 /* remove the address from the old ifn */ 588 sctp_remove_ifa_from_ifn(sctp_ifap); 589 /* move the address over to the new ifn */ 590 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 591 goto exit_stage_left; 592 } else { 593 /* repair ifnp which was NULL ? */ 594 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 595 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 596 (void *)sctp_ifnp, (void *)sctp_ifap); 597 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 598 } 599 goto exit_stage_left; 600 } 601 } 602 sctp_ifap = new_sctp_ifap; 603 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 604 sctp_ifap->ifn_p = sctp_ifnp; 605 atomic_add_int(&sctp_ifnp->refcount, 1); 606 sctp_ifap->vrf_id = vrf_id; 607 sctp_ifap->ifa = ifa; 608 memcpy(&sctp_ifap->address, addr, addr->sa_len); 609 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 610 sctp_ifap->flags = ifa_flags; 611 /* Set scope */ 612 switch (sctp_ifap->address.sa.sa_family) { 613 #ifdef INET 614 case AF_INET: 615 { 616 struct sockaddr_in *sin; 617 618 sin = &sctp_ifap->address.sin; 619 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 620 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 621 sctp_ifap->src_is_loop = 1; 622 } 623 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 624 sctp_ifap->src_is_priv = 1; 625 } 626 sctp_ifnp->num_v4++; 627 if (new_ifn_af) 628 new_ifn_af = AF_INET; 629 break; 630 } 631 #endif 632 #ifdef INET6 633 case AF_INET6: 634 { 635 /* ok to use deprecated addresses? */ 636 struct sockaddr_in6 *sin6; 637 638 sin6 = &sctp_ifap->address.sin6; 639 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 640 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 641 sctp_ifap->src_is_loop = 1; 642 } 643 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 644 sctp_ifap->src_is_priv = 1; 645 } 646 sctp_ifnp->num_v6++; 647 if (new_ifn_af) 648 new_ifn_af = AF_INET6; 649 break; 650 } 651 #endif 652 default: 653 new_ifn_af = 0; 654 break; 655 } 656 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 657 658 if ((sctp_ifap->src_is_priv == 0) && 659 (sctp_ifap->src_is_loop == 0)) { 660 sctp_ifap->src_is_glob = 1; 661 } 662 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 663 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 664 sctp_ifap->refcount = 1; 665 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 666 sctp_ifnp->ifa_count++; 667 vrf->total_ifa_count++; 668 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 669 if (new_ifn_af) { 670 sctp_ifnp->registered_af = new_ifn_af; 671 } 672 SCTP_IPI_ADDR_WUNLOCK(); 673 if (new_sctp_ifnp != NULL) { 674 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 675 } 676 677 if (dynamic_add) { 678 /* 679 * Bump up the refcount so that when the timer completes it 680 * will drop back down. 681 */ 682 struct sctp_laddr *wi; 683 684 atomic_add_int(&sctp_ifap->refcount, 1); 685 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 686 if (wi == NULL) { 687 /* 688 * Gak, what can we do? We have lost an address 689 * change can you say HOSED? 690 */ 691 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 692 /* Opps, must decrement the count */ 693 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 694 if_name); 695 return (NULL); 696 } 697 SCTP_INCR_LADDR_COUNT(); 698 memset(wi, 0, sizeof(*wi)); 699 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 700 wi->ifa = sctp_ifap; 701 wi->action = SCTP_ADD_IP_ADDRESS; 702 703 SCTP_WQ_ADDR_LOCK(); 704 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 705 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 706 (struct sctp_inpcb *)NULL, 707 (struct sctp_tcb *)NULL, 708 (struct sctp_nets *)NULL); 709 SCTP_WQ_ADDR_UNLOCK(); 710 } else { 711 /* it's ready for use */ 712 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 713 } 714 return (sctp_ifap); 715 } 716 717 void 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 719 uint32_t ifn_index, const char *if_name) 720 { 721 struct sctp_vrf *vrf; 722 struct sctp_ifa *sctp_ifap = NULL; 723 724 SCTP_IPI_ADDR_WLOCK(); 725 vrf = sctp_find_vrf(vrf_id); 726 if (vrf == NULL) { 727 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 728 goto out_now; 729 } 730 731 #ifdef SCTP_DEBUG 732 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 733 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 734 #endif 735 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 736 if (sctp_ifap) { 737 /* Validate the delete */ 738 if (sctp_ifap->ifn_p) { 739 int valid = 0; 740 741 /*- 742 * The name has priority over the ifn_index 743 * if its given. 744 */ 745 if (if_name) { 746 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 747 /* They match its a correct delete */ 748 valid = 1; 749 } 750 } 751 if (!valid) { 752 /* last ditch check ifn_index */ 753 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 754 valid = 1; 755 } 756 } 757 if (!valid) { 758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 759 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 760 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 761 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 762 SCTP_IPI_ADDR_WUNLOCK(); 763 return; 764 } 765 } 766 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 767 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 768 /* 769 * We don't set the flag. This means that the structure will 770 * hang around in EP's that have bound specific to it until 771 * they close. This gives us TCP like behavior if someone 772 * removes an address (or for that matter adds it right 773 * back). 774 */ 775 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 776 vrf->total_ifa_count--; 777 LIST_REMOVE(sctp_ifap, next_bucket); 778 sctp_remove_ifa_from_ifn(sctp_ifap); 779 } 780 #ifdef SCTP_DEBUG 781 else { 782 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 783 ifn_index); 784 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 785 } 786 #endif 787 788 out_now: 789 SCTP_IPI_ADDR_WUNLOCK(); 790 if (sctp_ifap) { 791 struct sctp_laddr *wi; 792 793 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 794 if (wi == NULL) { 795 /* 796 * Gak, what can we do? We have lost an address 797 * change can you say HOSED? 798 */ 799 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 800 801 /* Oops, must decrement the count */ 802 sctp_free_ifa(sctp_ifap); 803 return; 804 } 805 SCTP_INCR_LADDR_COUNT(); 806 memset(wi, 0, sizeof(*wi)); 807 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 808 wi->ifa = sctp_ifap; 809 wi->action = SCTP_DEL_IP_ADDRESS; 810 SCTP_WQ_ADDR_LOCK(); 811 /* 812 * Should this really be a tailq? As it is we will process 813 * the newest first :-0 814 */ 815 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 816 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 817 (struct sctp_inpcb *)NULL, 818 (struct sctp_tcb *)NULL, 819 (struct sctp_nets *)NULL); 820 SCTP_WQ_ADDR_UNLOCK(); 821 } 822 return; 823 } 824 825 static int 826 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 827 { 828 int loopback_scope; 829 #if defined(INET) 830 int ipv4_local_scope, ipv4_addr_legal; 831 #endif 832 #if defined(INET6) 833 int local_scope, site_scope, ipv6_addr_legal; 834 #endif 835 struct sctp_vrf *vrf; 836 struct sctp_ifn *sctp_ifn; 837 struct sctp_ifa *sctp_ifa; 838 839 loopback_scope = stcb->asoc.scope.loopback_scope; 840 #if defined(INET) 841 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 842 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 843 #endif 844 #if defined(INET6) 845 local_scope = stcb->asoc.scope.local_scope; 846 site_scope = stcb->asoc.scope.site_scope; 847 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 848 #endif 849 850 SCTP_IPI_ADDR_RLOCK(); 851 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 852 if (vrf == NULL) { 853 /* no vrf, no addresses */ 854 SCTP_IPI_ADDR_RUNLOCK(); 855 return (0); 856 } 857 858 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 859 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 860 if ((loopback_scope == 0) && 861 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 862 continue; 863 } 864 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 865 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 866 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 867 /* 868 * We allow pending addresses, where 869 * we have sent an asconf-add to be 870 * considered valid. 871 */ 872 continue; 873 } 874 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 875 continue; 876 } 877 switch (sctp_ifa->address.sa.sa_family) { 878 #ifdef INET 879 case AF_INET: 880 if (ipv4_addr_legal) { 881 struct sockaddr_in *sin, 882 *rsin; 883 884 sin = &sctp_ifa->address.sin; 885 rsin = (struct sockaddr_in *)to; 886 if ((ipv4_local_scope == 0) && 887 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 888 continue; 889 } 890 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 891 &sin->sin_addr) != 0) { 892 continue; 893 } 894 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 895 SCTP_IPI_ADDR_RUNLOCK(); 896 return (1); 897 } 898 } 899 break; 900 #endif 901 #ifdef INET6 902 case AF_INET6: 903 if (ipv6_addr_legal) { 904 struct sockaddr_in6 *sin6, 905 *rsin6; 906 907 sin6 = &sctp_ifa->address.sin6; 908 rsin6 = (struct sockaddr_in6 *)to; 909 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 910 &sin6->sin6_addr) != 0) { 911 continue; 912 } 913 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 914 if (local_scope == 0) 915 continue; 916 if (sin6->sin6_scope_id == 0) { 917 if (sa6_recoverscope(sin6) != 0) 918 continue; 919 } 920 } 921 if ((site_scope == 0) && 922 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 923 continue; 924 } 925 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 926 SCTP_IPI_ADDR_RUNLOCK(); 927 return (1); 928 } 929 } 930 break; 931 #endif 932 default: 933 /* TSNH */ 934 break; 935 } 936 } 937 } 938 } else { 939 struct sctp_laddr *laddr; 940 941 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 942 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 943 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 944 continue; 945 } 946 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 947 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 948 /* 949 * We allow pending addresses, where we have 950 * sent an asconf-add to be considered 951 * valid. 952 */ 953 continue; 954 } 955 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 956 continue; 957 } 958 switch (to->sa_family) { 959 #ifdef INET 960 case AF_INET: 961 { 962 struct sockaddr_in *sin, *rsin; 963 964 sin = &laddr->ifa->address.sin; 965 rsin = (struct sockaddr_in *)to; 966 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 967 SCTP_IPI_ADDR_RUNLOCK(); 968 return (1); 969 } 970 break; 971 } 972 #endif 973 #ifdef INET6 974 case AF_INET6: 975 { 976 struct sockaddr_in6 *sin6, *rsin6; 977 978 sin6 = &laddr->ifa->address.sin6; 979 rsin6 = (struct sockaddr_in6 *)to; 980 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 981 SCTP_IPI_ADDR_RUNLOCK(); 982 return (1); 983 } 984 break; 985 } 986 987 #endif 988 default: 989 /* TSNH */ 990 break; 991 } 992 } 993 } 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (0); 996 } 997 998 static struct sctp_tcb * 999 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1000 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1001 { 1002 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1003 /* 1004 * If we support the TCP model, then we must now dig through to see 1005 * if we can find our endpoint in the list of tcp ep's. 1006 */ 1007 uint16_t lport, rport; 1008 struct sctppcbhead *ephead; 1009 struct sctp_inpcb *inp; 1010 struct sctp_laddr *laddr; 1011 struct sctp_tcb *stcb; 1012 struct sctp_nets *net; 1013 1014 if ((to == NULL) || (from == NULL)) { 1015 return (NULL); 1016 } 1017 1018 switch (to->sa_family) { 1019 #ifdef INET 1020 case AF_INET: 1021 if (from->sa_family == AF_INET) { 1022 lport = ((struct sockaddr_in *)to)->sin_port; 1023 rport = ((struct sockaddr_in *)from)->sin_port; 1024 } else { 1025 return (NULL); 1026 } 1027 break; 1028 #endif 1029 #ifdef INET6 1030 case AF_INET6: 1031 if (from->sa_family == AF_INET6) { 1032 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1033 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1034 } else { 1035 return (NULL); 1036 } 1037 break; 1038 #endif 1039 default: 1040 return (NULL); 1041 } 1042 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1043 /* 1044 * Ok now for each of the guys in this bucket we must look and see: 1045 * - Does the remote port match. - Does there single association's 1046 * addresses match this address (to). If so we update p_ep to point 1047 * to this ep and return the tcb from it. 1048 */ 1049 LIST_FOREACH(inp, ephead, sctp_hash) { 1050 SCTP_INP_RLOCK(inp); 1051 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1052 SCTP_INP_RUNLOCK(inp); 1053 continue; 1054 } 1055 if (lport != inp->sctp_lport) { 1056 SCTP_INP_RUNLOCK(inp); 1057 continue; 1058 } 1059 switch (to->sa_family) { 1060 #ifdef INET 1061 case AF_INET: 1062 { 1063 struct sockaddr_in *sin; 1064 1065 sin = (struct sockaddr_in *)to; 1066 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1067 &sin->sin_addr) != 0) { 1068 SCTP_INP_RUNLOCK(inp); 1069 continue; 1070 } 1071 break; 1072 } 1073 #endif 1074 #ifdef INET6 1075 case AF_INET6: 1076 { 1077 struct sockaddr_in6 *sin6; 1078 1079 sin6 = (struct sockaddr_in6 *)to; 1080 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1081 &sin6->sin6_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 default: 1089 SCTP_INP_RUNLOCK(inp); 1090 continue; 1091 } 1092 if (inp->def_vrf_id != vrf_id) { 1093 SCTP_INP_RUNLOCK(inp); 1094 continue; 1095 } 1096 /* check to see if the ep has one of the addresses */ 1097 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1098 /* We are NOT bound all, so look further */ 1099 int match = 0; 1100 1101 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1102 if (laddr->ifa == NULL) { 1103 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1104 continue; 1105 } 1106 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1107 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1108 continue; 1109 } 1110 if (laddr->ifa->address.sa.sa_family == 1111 to->sa_family) { 1112 /* see if it matches */ 1113 #ifdef INET 1114 if (from->sa_family == AF_INET) { 1115 struct sockaddr_in *intf_addr, 1116 *sin; 1117 1118 intf_addr = &laddr->ifa->address.sin; 1119 sin = (struct sockaddr_in *)to; 1120 if (sin->sin_addr.s_addr == 1121 intf_addr->sin_addr.s_addr) { 1122 match = 1; 1123 break; 1124 } 1125 } 1126 #endif 1127 #ifdef INET6 1128 if (from->sa_family == AF_INET6) { 1129 struct sockaddr_in6 *intf_addr6; 1130 struct sockaddr_in6 *sin6; 1131 1132 sin6 = (struct sockaddr_in6 *) 1133 to; 1134 intf_addr6 = &laddr->ifa->address.sin6; 1135 1136 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1137 intf_addr6)) { 1138 match = 1; 1139 break; 1140 } 1141 } 1142 #endif 1143 } 1144 } 1145 if (match == 0) { 1146 /* This endpoint does not have this address */ 1147 SCTP_INP_RUNLOCK(inp); 1148 continue; 1149 } 1150 } 1151 /* 1152 * Ok if we hit here the ep has the address, does it hold 1153 * the tcb? 1154 */ 1155 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1156 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1157 if (stcb == NULL) { 1158 SCTP_INP_RUNLOCK(inp); 1159 continue; 1160 } 1161 SCTP_TCB_LOCK(stcb); 1162 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1163 SCTP_TCB_UNLOCK(stcb); 1164 SCTP_INP_RUNLOCK(inp); 1165 continue; 1166 } 1167 if (stcb->rport != rport) { 1168 /* remote port does not match. */ 1169 SCTP_TCB_UNLOCK(stcb); 1170 SCTP_INP_RUNLOCK(inp); 1171 continue; 1172 } 1173 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1174 SCTP_TCB_UNLOCK(stcb); 1175 SCTP_INP_RUNLOCK(inp); 1176 continue; 1177 } 1178 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1179 SCTP_TCB_UNLOCK(stcb); 1180 SCTP_INP_RUNLOCK(inp); 1181 continue; 1182 } 1183 /* Does this TCB have a matching address? */ 1184 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1185 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1186 /* not the same family, can't be a match */ 1187 continue; 1188 } 1189 switch (from->sa_family) { 1190 #ifdef INET 1191 case AF_INET: 1192 { 1193 struct sockaddr_in *sin, *rsin; 1194 1195 sin = (struct sockaddr_in *)&net->ro._l_addr; 1196 rsin = (struct sockaddr_in *)from; 1197 if (sin->sin_addr.s_addr == 1198 rsin->sin_addr.s_addr) { 1199 /* found it */ 1200 if (netp != NULL) { 1201 *netp = net; 1202 } 1203 /* 1204 * Update the endpoint 1205 * pointer 1206 */ 1207 *inp_p = inp; 1208 SCTP_INP_RUNLOCK(inp); 1209 return (stcb); 1210 } 1211 break; 1212 } 1213 #endif 1214 #ifdef INET6 1215 case AF_INET6: 1216 { 1217 struct sockaddr_in6 *sin6, *rsin6; 1218 1219 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1220 rsin6 = (struct sockaddr_in6 *)from; 1221 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1222 rsin6)) { 1223 /* found it */ 1224 if (netp != NULL) { 1225 *netp = net; 1226 } 1227 /* 1228 * Update the endpoint 1229 * pointer 1230 */ 1231 *inp_p = inp; 1232 SCTP_INP_RUNLOCK(inp); 1233 return (stcb); 1234 } 1235 break; 1236 } 1237 #endif 1238 default: 1239 /* TSNH */ 1240 break; 1241 } 1242 } 1243 SCTP_TCB_UNLOCK(stcb); 1244 SCTP_INP_RUNLOCK(inp); 1245 } 1246 return (NULL); 1247 } 1248 1249 /* 1250 * rules for use 1251 * 1252 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1253 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1254 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1255 * NULL. 1256 */ 1257 1258 struct sctp_tcb * 1259 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1260 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1261 { 1262 struct sctpasochead *head; 1263 struct sctp_inpcb *inp; 1264 struct sctp_tcb *stcb = NULL; 1265 struct sctp_nets *net; 1266 uint16_t rport; 1267 1268 inp = *inp_p; 1269 switch (remote->sa_family) { 1270 #ifdef INET 1271 case AF_INET: 1272 rport = (((struct sockaddr_in *)remote)->sin_port); 1273 break; 1274 #endif 1275 #ifdef INET6 1276 case AF_INET6: 1277 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1278 break; 1279 #endif 1280 default: 1281 return (NULL); 1282 } 1283 if (locked_tcb) { 1284 /* 1285 * UN-lock so we can do proper locking here this occurs when 1286 * called from load_addresses_from_init. 1287 */ 1288 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1289 SCTP_TCB_UNLOCK(locked_tcb); 1290 } 1291 SCTP_INP_INFO_RLOCK(); 1292 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1293 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1294 /*- 1295 * Now either this guy is our listener or it's the 1296 * connector. If it is the one that issued the connect, then 1297 * it's only chance is to be the first TCB in the list. If 1298 * it is the acceptor, then do the special_lookup to hash 1299 * and find the real inp. 1300 */ 1301 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1302 /* to is peer addr, from is my addr */ 1303 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1304 netp, inp->def_vrf_id); 1305 if ((stcb != NULL) && (locked_tcb == NULL)) { 1306 /* we have a locked tcb, lower refcount */ 1307 SCTP_INP_DECR_REF(inp); 1308 } 1309 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1310 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1311 SCTP_TCB_LOCK(locked_tcb); 1312 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1313 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1314 } 1315 SCTP_INP_INFO_RUNLOCK(); 1316 return (stcb); 1317 } else { 1318 SCTP_INP_WLOCK(inp); 1319 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1320 goto null_return; 1321 } 1322 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1323 if (stcb == NULL) { 1324 goto null_return; 1325 } 1326 SCTP_TCB_LOCK(stcb); 1327 1328 if (stcb->rport != rport) { 1329 /* remote port does not match. */ 1330 SCTP_TCB_UNLOCK(stcb); 1331 goto null_return; 1332 } 1333 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1334 SCTP_TCB_UNLOCK(stcb); 1335 goto null_return; 1336 } 1337 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1338 SCTP_TCB_UNLOCK(stcb); 1339 goto null_return; 1340 } 1341 /* now look at the list of remote addresses */ 1342 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1343 #ifdef INVARIANTS 1344 if (net == (TAILQ_NEXT(net, sctp_next))) { 1345 panic("Corrupt net list"); 1346 } 1347 #endif 1348 if (net->ro._l_addr.sa.sa_family != 1349 remote->sa_family) { 1350 /* not the same family */ 1351 continue; 1352 } 1353 switch (remote->sa_family) { 1354 #ifdef INET 1355 case AF_INET: 1356 { 1357 struct sockaddr_in *sin, 1358 *rsin; 1359 1360 sin = (struct sockaddr_in *) 1361 &net->ro._l_addr; 1362 rsin = (struct sockaddr_in *)remote; 1363 if (sin->sin_addr.s_addr == 1364 rsin->sin_addr.s_addr) { 1365 /* found it */ 1366 if (netp != NULL) { 1367 *netp = net; 1368 } 1369 if (locked_tcb == NULL) { 1370 SCTP_INP_DECR_REF(inp); 1371 } else if (locked_tcb != stcb) { 1372 SCTP_TCB_LOCK(locked_tcb); 1373 } 1374 if (locked_tcb) { 1375 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1376 } 1377 1378 SCTP_INP_WUNLOCK(inp); 1379 SCTP_INP_INFO_RUNLOCK(); 1380 return (stcb); 1381 } 1382 break; 1383 } 1384 #endif 1385 #ifdef INET6 1386 case AF_INET6: 1387 { 1388 struct sockaddr_in6 *sin6, 1389 *rsin6; 1390 1391 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1392 rsin6 = (struct sockaddr_in6 *)remote; 1393 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1394 rsin6)) { 1395 /* found it */ 1396 if (netp != NULL) { 1397 *netp = net; 1398 } 1399 if (locked_tcb == NULL) { 1400 SCTP_INP_DECR_REF(inp); 1401 } else if (locked_tcb != stcb) { 1402 SCTP_TCB_LOCK(locked_tcb); 1403 } 1404 if (locked_tcb) { 1405 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1406 } 1407 SCTP_INP_WUNLOCK(inp); 1408 SCTP_INP_INFO_RUNLOCK(); 1409 return (stcb); 1410 } 1411 break; 1412 } 1413 #endif 1414 default: 1415 /* TSNH */ 1416 break; 1417 } 1418 } 1419 SCTP_TCB_UNLOCK(stcb); 1420 } 1421 } else { 1422 SCTP_INP_WLOCK(inp); 1423 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1424 goto null_return; 1425 } 1426 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1427 inp->sctp_hashmark)]; 1428 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1429 if (stcb->rport != rport) { 1430 /* remote port does not match */ 1431 continue; 1432 } 1433 SCTP_TCB_LOCK(stcb); 1434 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1435 SCTP_TCB_UNLOCK(stcb); 1436 continue; 1437 } 1438 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1439 SCTP_TCB_UNLOCK(stcb); 1440 continue; 1441 } 1442 /* now look at the list of remote addresses */ 1443 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1444 #ifdef INVARIANTS 1445 if (net == (TAILQ_NEXT(net, sctp_next))) { 1446 panic("Corrupt net list"); 1447 } 1448 #endif 1449 if (net->ro._l_addr.sa.sa_family != 1450 remote->sa_family) { 1451 /* not the same family */ 1452 continue; 1453 } 1454 switch (remote->sa_family) { 1455 #ifdef INET 1456 case AF_INET: 1457 { 1458 struct sockaddr_in *sin, 1459 *rsin; 1460 1461 sin = (struct sockaddr_in *) 1462 &net->ro._l_addr; 1463 rsin = (struct sockaddr_in *)remote; 1464 if (sin->sin_addr.s_addr == 1465 rsin->sin_addr.s_addr) { 1466 /* found it */ 1467 if (netp != NULL) { 1468 *netp = net; 1469 } 1470 if (locked_tcb == NULL) { 1471 SCTP_INP_DECR_REF(inp); 1472 } else if (locked_tcb != stcb) { 1473 SCTP_TCB_LOCK(locked_tcb); 1474 } 1475 if (locked_tcb) { 1476 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1477 } 1478 SCTP_INP_WUNLOCK(inp); 1479 SCTP_INP_INFO_RUNLOCK(); 1480 return (stcb); 1481 } 1482 break; 1483 } 1484 #endif 1485 #ifdef INET6 1486 case AF_INET6: 1487 { 1488 struct sockaddr_in6 *sin6, 1489 *rsin6; 1490 1491 sin6 = (struct sockaddr_in6 *) 1492 &net->ro._l_addr; 1493 rsin6 = (struct sockaddr_in6 *)remote; 1494 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1495 rsin6)) { 1496 /* found it */ 1497 if (netp != NULL) { 1498 *netp = net; 1499 } 1500 if (locked_tcb == NULL) { 1501 SCTP_INP_DECR_REF(inp); 1502 } else if (locked_tcb != stcb) { 1503 SCTP_TCB_LOCK(locked_tcb); 1504 } 1505 if (locked_tcb) { 1506 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1507 } 1508 SCTP_INP_WUNLOCK(inp); 1509 SCTP_INP_INFO_RUNLOCK(); 1510 return (stcb); 1511 } 1512 break; 1513 } 1514 #endif 1515 default: 1516 /* TSNH */ 1517 break; 1518 } 1519 } 1520 SCTP_TCB_UNLOCK(stcb); 1521 } 1522 } 1523 null_return: 1524 /* clean up for returning null */ 1525 if (locked_tcb) { 1526 SCTP_TCB_LOCK(locked_tcb); 1527 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1528 } 1529 SCTP_INP_WUNLOCK(inp); 1530 SCTP_INP_INFO_RUNLOCK(); 1531 /* not found */ 1532 return (NULL); 1533 } 1534 1535 /* 1536 * Find an association for a specific endpoint using the association id given 1537 * out in the COMM_UP notification 1538 */ 1539 struct sctp_tcb * 1540 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1541 { 1542 /* 1543 * Use my the assoc_id to find a endpoint 1544 */ 1545 struct sctpasochead *head; 1546 struct sctp_tcb *stcb; 1547 uint32_t id; 1548 1549 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1550 SCTP_PRINTF("TSNH ep_associd0\n"); 1551 return (NULL); 1552 } 1553 id = (uint32_t)asoc_id; 1554 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1555 if (head == NULL) { 1556 /* invalid id TSNH */ 1557 SCTP_PRINTF("TSNH ep_associd1\n"); 1558 return (NULL); 1559 } 1560 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1561 if (stcb->asoc.assoc_id == id) { 1562 if (inp != stcb->sctp_ep) { 1563 /* 1564 * some other guy has the same id active (id 1565 * collision ??). 1566 */ 1567 SCTP_PRINTF("TSNH ep_associd2\n"); 1568 continue; 1569 } 1570 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1571 continue; 1572 } 1573 if (want_lock) { 1574 SCTP_TCB_LOCK(stcb); 1575 } 1576 return (stcb); 1577 } 1578 } 1579 return (NULL); 1580 } 1581 1582 struct sctp_tcb * 1583 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1584 { 1585 struct sctp_tcb *stcb; 1586 1587 SCTP_INP_RLOCK(inp); 1588 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1589 SCTP_INP_RUNLOCK(inp); 1590 return (stcb); 1591 } 1592 1593 /* 1594 * Endpoint probe expects that the INP_INFO is locked. 1595 */ 1596 static struct sctp_inpcb * 1597 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1598 uint16_t lport, uint32_t vrf_id) 1599 { 1600 struct sctp_inpcb *inp; 1601 struct sctp_laddr *laddr; 1602 #ifdef INET 1603 struct sockaddr_in *sin; 1604 #endif 1605 #ifdef INET6 1606 struct sockaddr_in6 *sin6; 1607 struct sockaddr_in6 *intf_addr6; 1608 #endif 1609 int fnd; 1610 1611 #ifdef INET 1612 sin = NULL; 1613 #endif 1614 #ifdef INET6 1615 sin6 = NULL; 1616 #endif 1617 switch (nam->sa_family) { 1618 #ifdef INET 1619 case AF_INET: 1620 sin = (struct sockaddr_in *)nam; 1621 break; 1622 #endif 1623 #ifdef INET6 1624 case AF_INET6: 1625 sin6 = (struct sockaddr_in6 *)nam; 1626 break; 1627 #endif 1628 default: 1629 /* unsupported family */ 1630 return (NULL); 1631 } 1632 1633 if (head == NULL) 1634 return (NULL); 1635 1636 LIST_FOREACH(inp, head, sctp_hash) { 1637 SCTP_INP_RLOCK(inp); 1638 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1639 SCTP_INP_RUNLOCK(inp); 1640 continue; 1641 } 1642 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1643 (inp->sctp_lport == lport)) { 1644 /* got it */ 1645 switch (nam->sa_family) { 1646 #ifdef INET 1647 case AF_INET: 1648 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1649 SCTP_IPV6_V6ONLY(inp)) { 1650 /* 1651 * IPv4 on a IPv6 socket with ONLY 1652 * IPv6 set 1653 */ 1654 SCTP_INP_RUNLOCK(inp); 1655 continue; 1656 } 1657 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1658 &sin->sin_addr) != 0) { 1659 SCTP_INP_RUNLOCK(inp); 1660 continue; 1661 } 1662 break; 1663 #endif 1664 #ifdef INET6 1665 case AF_INET6: 1666 /* 1667 * A V6 address and the endpoint is NOT 1668 * bound V6 1669 */ 1670 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1671 SCTP_INP_RUNLOCK(inp); 1672 continue; 1673 } 1674 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1675 &sin6->sin6_addr) != 0) { 1676 SCTP_INP_RUNLOCK(inp); 1677 continue; 1678 } 1679 break; 1680 #endif 1681 default: 1682 break; 1683 } 1684 /* does a VRF id match? */ 1685 fnd = 0; 1686 if (inp->def_vrf_id == vrf_id) 1687 fnd = 1; 1688 1689 SCTP_INP_RUNLOCK(inp); 1690 if (!fnd) 1691 continue; 1692 return (inp); 1693 } 1694 SCTP_INP_RUNLOCK(inp); 1695 } 1696 switch (nam->sa_family) { 1697 #ifdef INET 1698 case AF_INET: 1699 if (sin->sin_addr.s_addr == INADDR_ANY) { 1700 /* Can't hunt for one that has no address specified */ 1701 return (NULL); 1702 } 1703 break; 1704 #endif 1705 #ifdef INET6 1706 case AF_INET6: 1707 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1708 /* Can't hunt for one that has no address specified */ 1709 return (NULL); 1710 } 1711 break; 1712 #endif 1713 default: 1714 break; 1715 } 1716 /* 1717 * ok, not bound to all so see if we can find a EP bound to this 1718 * address. 1719 */ 1720 LIST_FOREACH(inp, head, sctp_hash) { 1721 SCTP_INP_RLOCK(inp); 1722 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1723 SCTP_INP_RUNLOCK(inp); 1724 continue; 1725 } 1726 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1727 SCTP_INP_RUNLOCK(inp); 1728 continue; 1729 } 1730 /* 1731 * Ok this could be a likely candidate, look at all of its 1732 * addresses 1733 */ 1734 if (inp->sctp_lport != lport) { 1735 SCTP_INP_RUNLOCK(inp); 1736 continue; 1737 } 1738 /* does a VRF id match? */ 1739 fnd = 0; 1740 if (inp->def_vrf_id == vrf_id) 1741 fnd = 1; 1742 1743 if (!fnd) { 1744 SCTP_INP_RUNLOCK(inp); 1745 continue; 1746 } 1747 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1748 if (laddr->ifa == NULL) { 1749 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1750 __func__); 1751 continue; 1752 } 1753 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1754 (void *)laddr->ifa); 1755 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1756 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1757 continue; 1758 } 1759 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1760 /* possible, see if it matches */ 1761 switch (nam->sa_family) { 1762 #ifdef INET 1763 case AF_INET: 1764 if (sin->sin_addr.s_addr == 1765 laddr->ifa->address.sin.sin_addr.s_addr) { 1766 SCTP_INP_RUNLOCK(inp); 1767 return (inp); 1768 } 1769 break; 1770 #endif 1771 #ifdef INET6 1772 case AF_INET6: 1773 intf_addr6 = &laddr->ifa->address.sin6; 1774 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1775 intf_addr6)) { 1776 SCTP_INP_RUNLOCK(inp); 1777 return (inp); 1778 } 1779 break; 1780 #endif 1781 } 1782 } 1783 } 1784 SCTP_INP_RUNLOCK(inp); 1785 } 1786 return (NULL); 1787 } 1788 1789 static struct sctp_inpcb * 1790 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1791 { 1792 struct sctppcbhead *head; 1793 struct sctp_inpcb *t_inp; 1794 int fnd; 1795 1796 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1797 SCTP_BASE_INFO(hashmark))]; 1798 LIST_FOREACH(t_inp, head, sctp_hash) { 1799 if (t_inp->sctp_lport != lport) { 1800 continue; 1801 } 1802 /* is it in the VRF in question */ 1803 fnd = 0; 1804 if (t_inp->def_vrf_id == vrf_id) 1805 fnd = 1; 1806 if (!fnd) 1807 continue; 1808 1809 /* This one is in use. */ 1810 /* check the v6/v4 binding issue */ 1811 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1812 SCTP_IPV6_V6ONLY(t_inp)) { 1813 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1814 /* collision in V6 space */ 1815 return (t_inp); 1816 } else { 1817 /* inp is BOUND_V4 no conflict */ 1818 continue; 1819 } 1820 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1821 /* t_inp is bound v4 and v6, conflict always */ 1822 return (t_inp); 1823 } else { 1824 /* t_inp is bound only V4 */ 1825 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1826 SCTP_IPV6_V6ONLY(inp)) { 1827 /* no conflict */ 1828 continue; 1829 } 1830 /* else fall through to conflict */ 1831 } 1832 return (t_inp); 1833 } 1834 return (NULL); 1835 } 1836 1837 int 1838 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1839 { 1840 /* For 1-2-1 with port reuse */ 1841 struct sctppcbhead *head; 1842 struct sctp_inpcb *tinp, *ninp; 1843 1844 SCTP_INP_INFO_WLOCK_ASSERT(); 1845 SCTP_INP_WLOCK_ASSERT(inp); 1846 1847 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1848 /* only works with port reuse on */ 1849 return (-1); 1850 } 1851 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1852 return (0); 1853 } 1854 SCTP_INP_WUNLOCK(inp); 1855 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1856 SCTP_BASE_INFO(hashmark))]; 1857 /* Kick out all non-listeners to the TCP hash */ 1858 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1859 if (tinp->sctp_lport != inp->sctp_lport) { 1860 continue; 1861 } 1862 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1863 continue; 1864 } 1865 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1866 continue; 1867 } 1868 if (SCTP_IS_LISTENING(tinp)) { 1869 continue; 1870 } 1871 SCTP_INP_WLOCK(tinp); 1872 LIST_REMOVE(tinp, sctp_hash); 1873 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1874 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1875 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1876 SCTP_INP_WUNLOCK(tinp); 1877 } 1878 SCTP_INP_WLOCK(inp); 1879 /* Pull from where he was */ 1880 LIST_REMOVE(inp, sctp_hash); 1881 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1882 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1883 LIST_INSERT_HEAD(head, inp, sctp_hash); 1884 return (0); 1885 } 1886 1887 struct sctp_inpcb * 1888 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1889 uint32_t vrf_id) 1890 { 1891 /* 1892 * First we check the hash table to see if someone has this port 1893 * bound with just the port. 1894 */ 1895 struct sctp_inpcb *inp; 1896 struct sctppcbhead *head; 1897 int lport; 1898 unsigned int i; 1899 #ifdef INET 1900 struct sockaddr_in *sin; 1901 #endif 1902 #ifdef INET6 1903 struct sockaddr_in6 *sin6; 1904 #endif 1905 1906 switch (nam->sa_family) { 1907 #ifdef INET 1908 case AF_INET: 1909 sin = (struct sockaddr_in *)nam; 1910 lport = sin->sin_port; 1911 break; 1912 #endif 1913 #ifdef INET6 1914 case AF_INET6: 1915 sin6 = (struct sockaddr_in6 *)nam; 1916 lport = sin6->sin6_port; 1917 break; 1918 #endif 1919 default: 1920 return (NULL); 1921 } 1922 /* 1923 * I could cheat here and just cast to one of the types but we will 1924 * do it right. It also provides the check against an Unsupported 1925 * type too. 1926 */ 1927 /* Find the head of the ALLADDR chain */ 1928 if (have_lock == 0) { 1929 SCTP_INP_INFO_RLOCK(); 1930 } 1931 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1932 SCTP_BASE_INFO(hashmark))]; 1933 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1934 1935 /* 1936 * If the TCP model exists it could be that the main listening 1937 * endpoint is gone but there still exists a connected socket for 1938 * this guy. If so we can return the first one that we find. This 1939 * may NOT be the correct one so the caller should be wary on the 1940 * returned INP. Currently the only caller that sets find_tcp_pool 1941 * is in bindx where we are verifying that a user CAN bind the 1942 * address. He either has bound it already, or someone else has, or 1943 * its open to bind, so this is good enough. 1944 */ 1945 if (inp == NULL && find_tcp_pool) { 1946 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1947 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1948 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1949 if (inp) { 1950 break; 1951 } 1952 } 1953 } 1954 if (inp) { 1955 SCTP_INP_INCR_REF(inp); 1956 } 1957 if (have_lock == 0) { 1958 SCTP_INP_INFO_RUNLOCK(); 1959 } 1960 return (inp); 1961 } 1962 1963 /* 1964 * Find an association for an endpoint with the pointer to whom you want to 1965 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1966 * need to change the *to to some other struct like a mbuf... 1967 */ 1968 struct sctp_tcb * 1969 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1970 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1971 uint32_t vrf_id) 1972 { 1973 struct sctp_inpcb *inp = NULL; 1974 struct sctp_tcb *stcb; 1975 1976 SCTP_INP_INFO_RLOCK(); 1977 if (find_tcp_pool) { 1978 if (inp_p != NULL) { 1979 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1980 vrf_id); 1981 } else { 1982 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1983 vrf_id); 1984 } 1985 if (stcb != NULL) { 1986 SCTP_INP_INFO_RUNLOCK(); 1987 return (stcb); 1988 } 1989 } 1990 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1991 if (inp_p != NULL) { 1992 *inp_p = inp; 1993 } 1994 SCTP_INP_INFO_RUNLOCK(); 1995 if (inp == NULL) { 1996 return (NULL); 1997 } 1998 /* 1999 * ok, we have an endpoint, now lets find the assoc for it (if any) 2000 * we now place the source address or from in the to of the find 2001 * endpoint call. Since in reality this chain is used from the 2002 * inbound packet side. 2003 */ 2004 if (inp_p != NULL) { 2005 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2006 NULL); 2007 } else { 2008 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2009 NULL); 2010 } 2011 return (stcb); 2012 } 2013 2014 /* 2015 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2016 * find all addresses that the sender has specified in any address list. Each 2017 * address will be used to lookup the TCB and see if one exits. 2018 */ 2019 static struct sctp_tcb * 2020 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2021 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2022 struct sockaddr *dst) 2023 { 2024 struct sctp_paramhdr *phdr, param_buf; 2025 #if defined(INET) || defined(INET6) 2026 struct sctp_tcb *stcb; 2027 uint16_t ptype; 2028 #endif 2029 uint16_t plen; 2030 #ifdef INET 2031 struct sockaddr_in sin4; 2032 #endif 2033 #ifdef INET6 2034 struct sockaddr_in6 sin6; 2035 #endif 2036 2037 #ifdef INET 2038 memset(&sin4, 0, sizeof(sin4)); 2039 sin4.sin_len = sizeof(sin4); 2040 sin4.sin_family = AF_INET; 2041 sin4.sin_port = sh->src_port; 2042 #endif 2043 #ifdef INET6 2044 memset(&sin6, 0, sizeof(sin6)); 2045 sin6.sin6_len = sizeof(sin6); 2046 sin6.sin6_family = AF_INET6; 2047 sin6.sin6_port = sh->src_port; 2048 #endif 2049 2050 offset += sizeof(struct sctp_init_chunk); 2051 2052 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2053 while (phdr != NULL) { 2054 /* now we must see if we want the parameter */ 2055 #if defined(INET) || defined(INET6) 2056 ptype = ntohs(phdr->param_type); 2057 #endif 2058 plen = ntohs(phdr->param_length); 2059 if (plen == 0) { 2060 break; 2061 } 2062 #ifdef INET 2063 if (ptype == SCTP_IPV4_ADDRESS && 2064 plen == sizeof(struct sctp_ipv4addr_param)) { 2065 /* Get the rest of the address */ 2066 struct sctp_ipv4addr_param ip4_param, *p4; 2067 2068 phdr = sctp_get_next_param(m, offset, 2069 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2070 if (phdr == NULL) { 2071 return (NULL); 2072 } 2073 p4 = (struct sctp_ipv4addr_param *)phdr; 2074 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2075 /* look it up */ 2076 stcb = sctp_findassociation_ep_addr(inp_p, 2077 (struct sockaddr *)&sin4, netp, dst, NULL); 2078 if (stcb != NULL) { 2079 return (stcb); 2080 } 2081 } 2082 #endif 2083 #ifdef INET6 2084 if (ptype == SCTP_IPV6_ADDRESS && 2085 plen == sizeof(struct sctp_ipv6addr_param)) { 2086 /* Get the rest of the address */ 2087 struct sctp_ipv6addr_param ip6_param, *p6; 2088 2089 phdr = sctp_get_next_param(m, offset, 2090 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2091 if (phdr == NULL) { 2092 return (NULL); 2093 } 2094 p6 = (struct sctp_ipv6addr_param *)phdr; 2095 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2096 /* look it up */ 2097 stcb = sctp_findassociation_ep_addr(inp_p, 2098 (struct sockaddr *)&sin6, netp, dst, NULL); 2099 if (stcb != NULL) { 2100 return (stcb); 2101 } 2102 } 2103 #endif 2104 offset += SCTP_SIZE32(plen); 2105 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2106 sizeof(param_buf)); 2107 } 2108 return (NULL); 2109 } 2110 2111 static struct sctp_tcb * 2112 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2113 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2114 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2115 { 2116 /* 2117 * Use my vtag to hash. If we find it we then verify the source addr 2118 * is in the assoc. If all goes well we save a bit on rec of a 2119 * packet. 2120 */ 2121 struct sctpasochead *head; 2122 struct sctp_nets *net; 2123 struct sctp_tcb *stcb; 2124 2125 SCTP_INP_INFO_RLOCK(); 2126 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2127 SCTP_BASE_INFO(hashasocmark))]; 2128 LIST_FOREACH(stcb, head, sctp_asocs) { 2129 SCTP_INP_RLOCK(stcb->sctp_ep); 2130 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2131 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2132 continue; 2133 } 2134 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2135 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2136 continue; 2137 } 2138 SCTP_TCB_LOCK(stcb); 2139 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2140 if (stcb->asoc.my_vtag == vtag) { 2141 /* candidate */ 2142 if (stcb->rport != rport) { 2143 SCTP_TCB_UNLOCK(stcb); 2144 continue; 2145 } 2146 if (stcb->sctp_ep->sctp_lport != lport) { 2147 SCTP_TCB_UNLOCK(stcb); 2148 continue; 2149 } 2150 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2151 SCTP_TCB_UNLOCK(stcb); 2152 continue; 2153 } 2154 /* RRS:Need toaddr check here */ 2155 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2156 /* Endpoint does not own this address */ 2157 SCTP_TCB_UNLOCK(stcb); 2158 continue; 2159 } 2160 if (remote_tag) { 2161 /* 2162 * If we have both vtags that's all we match 2163 * on 2164 */ 2165 if (stcb->asoc.peer_vtag == remote_tag) { 2166 /* 2167 * If both tags match we consider it 2168 * conclusive and check NO 2169 * source/destination addresses 2170 */ 2171 goto conclusive; 2172 } 2173 } 2174 if (skip_src_check) { 2175 conclusive: 2176 if (from) { 2177 *netp = sctp_findnet(stcb, from); 2178 } else { 2179 *netp = NULL; /* unknown */ 2180 } 2181 if (inp_p) 2182 *inp_p = stcb->sctp_ep; 2183 SCTP_INP_INFO_RUNLOCK(); 2184 return (stcb); 2185 } 2186 net = sctp_findnet(stcb, from); 2187 if (net) { 2188 /* yep its him. */ 2189 *netp = net; 2190 SCTP_STAT_INCR(sctps_vtagexpress); 2191 *inp_p = stcb->sctp_ep; 2192 SCTP_INP_INFO_RUNLOCK(); 2193 return (stcb); 2194 } else { 2195 /* 2196 * not him, this should only happen in rare 2197 * cases so I peg it. 2198 */ 2199 SCTP_STAT_INCR(sctps_vtagbogus); 2200 } 2201 } 2202 SCTP_TCB_UNLOCK(stcb); 2203 } 2204 SCTP_INP_INFO_RUNLOCK(); 2205 return (NULL); 2206 } 2207 2208 /* 2209 * Find an association with the pointer to the inbound IP packet. This can be 2210 * a IPv4 or IPv6 packet. 2211 */ 2212 struct sctp_tcb * 2213 sctp_findassociation_addr(struct mbuf *m, int offset, 2214 struct sockaddr *src, struct sockaddr *dst, 2215 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2216 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2217 { 2218 struct sctp_tcb *stcb; 2219 struct sctp_inpcb *inp; 2220 2221 if (sh->v_tag) { 2222 /* we only go down this path if vtag is non-zero */ 2223 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2224 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2225 if (stcb) { 2226 return (stcb); 2227 } 2228 } 2229 2230 if (inp_p) { 2231 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2232 1, vrf_id); 2233 inp = *inp_p; 2234 } else { 2235 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2236 1, vrf_id); 2237 } 2238 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2239 if (stcb == NULL && inp) { 2240 /* Found a EP but not this address */ 2241 if ((ch->chunk_type == SCTP_INITIATION) || 2242 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2243 /*- 2244 * special hook, we do NOT return linp or an 2245 * association that is linked to an existing 2246 * association that is under the TCP pool (i.e. no 2247 * listener exists). The endpoint finding routine 2248 * will always find a listener before examining the 2249 * TCP pool. 2250 */ 2251 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2252 if (inp_p) { 2253 *inp_p = NULL; 2254 } 2255 return (NULL); 2256 } 2257 stcb = sctp_findassociation_special_addr(m, 2258 offset, sh, &inp, netp, dst); 2259 if (inp_p != NULL) { 2260 *inp_p = inp; 2261 } 2262 } 2263 } 2264 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2265 return (stcb); 2266 } 2267 2268 /* 2269 * lookup an association by an ASCONF lookup address. 2270 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2271 */ 2272 struct sctp_tcb * 2273 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2274 struct sockaddr *dst, struct sctphdr *sh, 2275 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2276 { 2277 struct sctp_tcb *stcb; 2278 union sctp_sockstore remote_store; 2279 struct sctp_paramhdr param_buf, *phdr; 2280 int ptype; 2281 int zero_address = 0; 2282 #ifdef INET 2283 struct sockaddr_in *sin; 2284 #endif 2285 #ifdef INET6 2286 struct sockaddr_in6 *sin6; 2287 #endif 2288 2289 memset(&remote_store, 0, sizeof(remote_store)); 2290 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2291 ¶m_buf, sizeof(struct sctp_paramhdr)); 2292 if (phdr == NULL) { 2293 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2294 __func__); 2295 return NULL; 2296 } 2297 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2298 /* get the correlation address */ 2299 switch (ptype) { 2300 #ifdef INET6 2301 case SCTP_IPV6_ADDRESS: 2302 { 2303 /* ipv6 address param */ 2304 struct sctp_ipv6addr_param *p6, p6_buf; 2305 2306 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2307 return NULL; 2308 } 2309 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2310 offset + sizeof(struct sctp_asconf_chunk), 2311 &p6_buf.ph, sizeof(p6_buf)); 2312 if (p6 == NULL) { 2313 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2314 __func__); 2315 return (NULL); 2316 } 2317 sin6 = &remote_store.sin6; 2318 sin6->sin6_family = AF_INET6; 2319 sin6->sin6_len = sizeof(*sin6); 2320 sin6->sin6_port = sh->src_port; 2321 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2322 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2323 zero_address = 1; 2324 break; 2325 } 2326 #endif 2327 #ifdef INET 2328 case SCTP_IPV4_ADDRESS: 2329 { 2330 /* ipv4 address param */ 2331 struct sctp_ipv4addr_param *p4, p4_buf; 2332 2333 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2334 return NULL; 2335 } 2336 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2337 offset + sizeof(struct sctp_asconf_chunk), 2338 &p4_buf.ph, sizeof(p4_buf)); 2339 if (p4 == NULL) { 2340 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2341 __func__); 2342 return (NULL); 2343 } 2344 sin = &remote_store.sin; 2345 sin->sin_family = AF_INET; 2346 sin->sin_len = sizeof(*sin); 2347 sin->sin_port = sh->src_port; 2348 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2349 if (sin->sin_addr.s_addr == INADDR_ANY) 2350 zero_address = 1; 2351 break; 2352 } 2353 #endif 2354 default: 2355 /* invalid address param type */ 2356 return NULL; 2357 } 2358 2359 if (zero_address) { 2360 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2361 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2362 if (stcb != NULL) { 2363 SCTP_INP_DECR_REF(*inp_p); 2364 } 2365 } else { 2366 stcb = sctp_findassociation_ep_addr(inp_p, 2367 &remote_store.sa, netp, 2368 dst, NULL); 2369 } 2370 return (stcb); 2371 } 2372 2373 /* 2374 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2375 * addresses. This way if we don't get a bind we by default pick a ephemeral 2376 * port with all addresses bound. 2377 */ 2378 int 2379 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2380 { 2381 /* 2382 * we get called when a new endpoint starts up. We need to allocate 2383 * the sctp_inpcb structure from the zone and init it. Mark it as 2384 * unbound and find a port that we can use as an ephemeral with 2385 * INADDR_ANY. If the user binds later no problem we can then add in 2386 * the specific addresses. And setup the default parameters for the 2387 * EP. 2388 */ 2389 int i, error; 2390 struct sctp_inpcb *inp; 2391 struct sctp_pcb *m; 2392 struct timeval time; 2393 sctp_sharedkey_t *null_key; 2394 2395 error = 0; 2396 2397 SCTP_INP_INFO_WLOCK(); 2398 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2399 if (inp == NULL) { 2400 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2401 SCTP_INP_INFO_WUNLOCK(); 2402 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2403 return (ENOBUFS); 2404 } 2405 /* zap it */ 2406 memset(inp, 0, sizeof(*inp)); 2407 2408 /* bump generations */ 2409 /* setup socket pointers */ 2410 inp->sctp_socket = so; 2411 inp->ip_inp.inp.inp_socket = so; 2412 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2413 #ifdef INET6 2414 if (INP_SOCKAF(so) == AF_INET6) { 2415 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2416 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2417 } 2418 if (MODULE_GLOBAL(ip6_v6only)) { 2419 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2420 } 2421 } 2422 #endif 2423 inp->sctp_associd_counter = 1; 2424 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2425 inp->sctp_frag_point = 0; 2426 inp->max_cwnd = 0; 2427 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2428 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2429 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2430 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2431 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2432 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2433 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2434 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2435 inp->idata_supported = 0; 2436 2437 inp->fibnum = so->so_fibnum; 2438 /* init the small hash table we use to track asocid <-> tcb */ 2439 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2440 if (inp->sctp_asocidhash == NULL) { 2441 crfree(inp->ip_inp.inp.inp_cred); 2442 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2443 SCTP_INP_INFO_WUNLOCK(); 2444 return (ENOBUFS); 2445 } 2446 SCTP_INCR_EP_COUNT(); 2447 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2448 SCTP_INP_INFO_WUNLOCK(); 2449 2450 so->so_pcb = (caddr_t)inp; 2451 2452 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2453 /* UDP style socket */ 2454 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2455 SCTP_PCB_FLAGS_UNBOUND); 2456 /* Be sure it is NON-BLOCKING IO for UDP */ 2457 /* SCTP_SET_SO_NBIO(so); */ 2458 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2459 /* TCP style socket */ 2460 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2461 SCTP_PCB_FLAGS_UNBOUND); 2462 /* Be sure we have blocking IO by default */ 2463 SOCK_LOCK(so); 2464 SCTP_CLEAR_SO_NBIO(so); 2465 SOCK_UNLOCK(so); 2466 } else { 2467 /* 2468 * unsupported socket type (RAW, etc)- in case we missed it 2469 * in protosw 2470 */ 2471 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2472 so->so_pcb = NULL; 2473 crfree(inp->ip_inp.inp.inp_cred); 2474 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2475 return (EOPNOTSUPP); 2476 } 2477 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2478 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2479 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2480 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2481 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2482 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2483 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2484 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2485 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2486 } 2487 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2488 &inp->sctp_hashmark); 2489 if (inp->sctp_tcbhash == NULL) { 2490 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2491 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2492 so->so_pcb = NULL; 2493 crfree(inp->ip_inp.inp.inp_cred); 2494 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2495 return (ENOBUFS); 2496 } 2497 inp->def_vrf_id = vrf_id; 2498 2499 SCTP_INP_INFO_WLOCK(); 2500 SCTP_INP_LOCK_INIT(inp); 2501 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2502 SCTP_INP_READ_INIT(inp); 2503 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2504 /* lock the new ep */ 2505 SCTP_INP_WLOCK(inp); 2506 2507 /* add it to the info area */ 2508 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2509 SCTP_INP_INFO_WUNLOCK(); 2510 2511 TAILQ_INIT(&inp->read_queue); 2512 LIST_INIT(&inp->sctp_addr_list); 2513 2514 LIST_INIT(&inp->sctp_asoc_list); 2515 2516 #ifdef SCTP_TRACK_FREED_ASOCS 2517 /* TEMP CODE */ 2518 LIST_INIT(&inp->sctp_asoc_free_list); 2519 #endif 2520 /* Init the timer structure for signature change */ 2521 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2522 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2523 2524 /* now init the actual endpoint default data */ 2525 m = &inp->sctp_ep; 2526 2527 /* setup the base timeout information */ 2528 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2529 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2530 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2531 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2532 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2533 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2534 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2535 /* all max/min max are in ms */ 2536 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2537 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2538 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2539 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2540 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2541 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2542 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2543 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2544 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2545 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2546 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2547 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2548 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2549 2550 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2551 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2552 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2553 /* number of streams to pre-open on a association */ 2554 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2555 2556 m->default_mtu = 0; 2557 /* Add adaptation cookie */ 2558 m->adaptation_layer_indicator = 0; 2559 m->adaptation_layer_indicator_provided = 0; 2560 2561 /* seed random number generator */ 2562 m->random_counter = 1; 2563 m->store_at = SCTP_SIGNATURE_SIZE; 2564 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2565 sctp_fill_random_store(m); 2566 2567 /* Minimum cookie size */ 2568 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2569 sizeof(struct sctp_state_cookie); 2570 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2571 2572 /* Setup the initial secret */ 2573 (void)SCTP_GETTIME_TIMEVAL(&time); 2574 m->time_of_secret_change = (unsigned int)time.tv_sec; 2575 2576 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2577 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2578 } 2579 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2580 2581 /* How long is a cookie good for ? */ 2582 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2583 /* 2584 * Initialize authentication parameters 2585 */ 2586 m->local_hmacs = sctp_default_supported_hmaclist(); 2587 m->local_auth_chunks = sctp_alloc_chunklist(); 2588 if (inp->asconf_supported) { 2589 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2590 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2591 } 2592 m->default_dscp = 0; 2593 #ifdef INET6 2594 m->default_flowlabel = 0; 2595 #endif 2596 m->port = 0; /* encapsulation disabled by default */ 2597 LIST_INIT(&m->shared_keys); 2598 /* add default NULL key as key id 0 */ 2599 null_key = sctp_alloc_sharedkey(); 2600 sctp_insert_sharedkey(&m->shared_keys, null_key); 2601 SCTP_INP_WUNLOCK(inp); 2602 #ifdef SCTP_LOG_CLOSING 2603 sctp_log_closing(inp, NULL, 12); 2604 #endif 2605 return (error); 2606 } 2607 2608 void 2609 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2610 struct sctp_tcb *stcb) 2611 { 2612 struct sctp_nets *net; 2613 uint16_t lport, rport; 2614 struct sctppcbhead *head; 2615 struct sctp_laddr *laddr, *oladdr; 2616 2617 atomic_add_int(&stcb->asoc.refcnt, 1); 2618 SCTP_TCB_UNLOCK(stcb); 2619 SCTP_INP_INFO_WLOCK(); 2620 SCTP_INP_WLOCK(old_inp); 2621 SCTP_INP_WLOCK(new_inp); 2622 SCTP_TCB_LOCK(stcb); 2623 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2624 2625 #ifdef INET6 2626 if (old_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2627 new_inp->ip_inp.inp.inp_flags |= old_inp->ip_inp.inp.inp_flags & INP_CONTROLOPTS; 2628 if (old_inp->ip_inp.inp.in6p_outputopts) { 2629 new_inp->ip_inp.inp.in6p_outputopts = ip6_copypktopts(old_inp->ip_inp.inp.in6p_outputopts, M_NOWAIT); 2630 } 2631 } 2632 #endif 2633 #if defined(INET) && defined(INET6) 2634 else 2635 #endif 2636 #ifdef INET 2637 { 2638 new_inp->ip_inp.inp.inp_ip_tos = old_inp->ip_inp.inp.inp_ip_tos; 2639 new_inp->ip_inp.inp.inp_ip_ttl = old_inp->ip_inp.inp.inp_ip_ttl; 2640 } 2641 #endif 2642 new_inp->sctp_ep.time_of_secret_change = 2643 old_inp->sctp_ep.time_of_secret_change; 2644 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2645 sizeof(old_inp->sctp_ep.secret_key)); 2646 new_inp->sctp_ep.current_secret_number = 2647 old_inp->sctp_ep.current_secret_number; 2648 new_inp->sctp_ep.last_secret_number = 2649 old_inp->sctp_ep.last_secret_number; 2650 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2651 2652 /* make it so new data pours into the new socket */ 2653 stcb->sctp_socket = new_inp->sctp_socket; 2654 stcb->sctp_ep = new_inp; 2655 2656 /* Copy the port across */ 2657 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2658 rport = stcb->rport; 2659 /* Pull the tcb from the old association */ 2660 LIST_REMOVE(stcb, sctp_tcbhash); 2661 LIST_REMOVE(stcb, sctp_tcblist); 2662 if (stcb->asoc.in_asocid_hash) { 2663 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2664 } 2665 /* Now insert the new_inp into the TCP connected hash */ 2666 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2667 2668 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2669 /* Its safe to access */ 2670 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2671 2672 /* Now move the tcb into the endpoint list */ 2673 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2674 /* 2675 * Question, do we even need to worry about the ep-hash since we 2676 * only have one connection? Probably not :> so lets get rid of it 2677 * and not suck up any kernel memory in that. 2678 */ 2679 if (stcb->asoc.in_asocid_hash) { 2680 struct sctpasochead *lhd; 2681 2682 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2683 new_inp->hashasocidmark)]; 2684 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2685 } 2686 /* Ok. Let's restart timer. */ 2687 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2688 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2689 stcb, net); 2690 } 2691 2692 SCTP_INP_INFO_WUNLOCK(); 2693 if (new_inp->sctp_tcbhash != NULL) { 2694 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2695 new_inp->sctp_tcbhash = NULL; 2696 } 2697 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2698 /* Subset bound, so copy in the laddr list from the old_inp */ 2699 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2700 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2701 if (laddr == NULL) { 2702 /* 2703 * Gak, what can we do? This assoc is really 2704 * HOSED. We probably should send an abort 2705 * here. 2706 */ 2707 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2708 continue; 2709 } 2710 SCTP_INCR_LADDR_COUNT(); 2711 memset(laddr, 0, sizeof(*laddr)); 2712 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2713 laddr->ifa = oladdr->ifa; 2714 atomic_add_int(&laddr->ifa->refcount, 1); 2715 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2716 sctp_nxt_addr); 2717 new_inp->laddr_count++; 2718 if (oladdr == stcb->asoc.last_used_address) { 2719 stcb->asoc.last_used_address = laddr; 2720 } 2721 } 2722 } 2723 /* Now any running timers need to be adjusted. */ 2724 if (stcb->asoc.dack_timer.ep == old_inp) { 2725 SCTP_INP_DECR_REF(old_inp); 2726 stcb->asoc.dack_timer.ep = new_inp; 2727 SCTP_INP_INCR_REF(new_inp); 2728 } 2729 if (stcb->asoc.asconf_timer.ep == old_inp) { 2730 SCTP_INP_DECR_REF(old_inp); 2731 stcb->asoc.asconf_timer.ep = new_inp; 2732 SCTP_INP_INCR_REF(new_inp); 2733 } 2734 if (stcb->asoc.strreset_timer.ep == old_inp) { 2735 SCTP_INP_DECR_REF(old_inp); 2736 stcb->asoc.strreset_timer.ep = new_inp; 2737 SCTP_INP_INCR_REF(new_inp); 2738 } 2739 if (stcb->asoc.shut_guard_timer.ep == old_inp) { 2740 SCTP_INP_DECR_REF(old_inp); 2741 stcb->asoc.shut_guard_timer.ep = new_inp; 2742 SCTP_INP_INCR_REF(new_inp); 2743 } 2744 if (stcb->asoc.autoclose_timer.ep == old_inp) { 2745 SCTP_INP_DECR_REF(old_inp); 2746 stcb->asoc.autoclose_timer.ep = new_inp; 2747 SCTP_INP_INCR_REF(new_inp); 2748 } 2749 if (stcb->asoc.delete_prim_timer.ep == old_inp) { 2750 SCTP_INP_DECR_REF(old_inp); 2751 stcb->asoc.delete_prim_timer.ep = new_inp; 2752 SCTP_INP_INCR_REF(new_inp); 2753 } 2754 /* now what about the nets? */ 2755 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2756 if (net->pmtu_timer.ep == old_inp) { 2757 SCTP_INP_DECR_REF(old_inp); 2758 net->pmtu_timer.ep = new_inp; 2759 SCTP_INP_INCR_REF(new_inp); 2760 } 2761 if (net->hb_timer.ep == old_inp) { 2762 SCTP_INP_DECR_REF(old_inp); 2763 net->hb_timer.ep = new_inp; 2764 SCTP_INP_INCR_REF(new_inp); 2765 } 2766 if (net->rxt_timer.ep == old_inp) { 2767 SCTP_INP_DECR_REF(old_inp); 2768 net->rxt_timer.ep = new_inp; 2769 SCTP_INP_INCR_REF(new_inp); 2770 } 2771 } 2772 SCTP_INP_WUNLOCK(new_inp); 2773 SCTP_INP_WUNLOCK(old_inp); 2774 } 2775 2776 /* 2777 * insert an laddr entry with the given ifa for the desired list 2778 */ 2779 static int 2780 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2781 { 2782 struct sctp_laddr *laddr; 2783 2784 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2785 if (laddr == NULL) { 2786 /* out of memory? */ 2787 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2788 return (EINVAL); 2789 } 2790 SCTP_INCR_LADDR_COUNT(); 2791 memset(laddr, 0, sizeof(*laddr)); 2792 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2793 laddr->ifa = ifa; 2794 laddr->action = act; 2795 atomic_add_int(&ifa->refcount, 1); 2796 /* insert it */ 2797 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2798 2799 return (0); 2800 } 2801 2802 /* 2803 * Remove an laddr entry from the local address list (on an assoc) 2804 */ 2805 static void 2806 sctp_remove_laddr(struct sctp_laddr *laddr) 2807 { 2808 2809 /* remove from the list */ 2810 LIST_REMOVE(laddr, sctp_nxt_addr); 2811 sctp_free_ifa(laddr->ifa); 2812 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2813 SCTP_DECR_LADDR_COUNT(); 2814 } 2815 2816 /* 2817 * Bind the socket, with the PCB and global info locks held. Note, if a 2818 * socket address is specified, the PCB lock may be dropped and re-acquired. 2819 * 2820 * sctp_ifap is used to bypass normal local address validation checks. 2821 */ 2822 int 2823 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr, 2824 struct sctp_ifa *sctp_ifap, struct thread *td) 2825 { 2826 /* bind a ep to a socket address */ 2827 struct sctppcbhead *head; 2828 struct sctp_inpcb *inp_tmp; 2829 struct inpcb *ip_inp; 2830 int port_reuse_active = 0; 2831 int bindall; 2832 uint16_t lport; 2833 int error; 2834 uint32_t vrf_id; 2835 2836 KASSERT(td != NULL, ("%s: null thread", __func__)); 2837 2838 error = 0; 2839 lport = 0; 2840 bindall = 1; 2841 ip_inp = &inp->ip_inp.inp; 2842 2843 SCTP_INP_INFO_WLOCK_ASSERT(); 2844 SCTP_INP_WLOCK_ASSERT(inp); 2845 2846 #ifdef SCTP_DEBUG 2847 if (addr) { 2848 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2849 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2850 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2851 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2852 } 2853 #endif 2854 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2855 error = EINVAL; 2856 /* already did a bind, subsequent binds NOT allowed ! */ 2857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2858 goto out; 2859 } 2860 if (addr != NULL) { 2861 switch (addr->sa_family) { 2862 #ifdef INET 2863 case AF_INET: 2864 { 2865 struct sockaddr_in *sin; 2866 2867 /* IPV6_V6ONLY socket? */ 2868 if (SCTP_IPV6_V6ONLY(inp)) { 2869 error = EINVAL; 2870 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2871 goto out; 2872 } 2873 if (addr->sa_len != sizeof(*sin)) { 2874 error = EINVAL; 2875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2876 goto out; 2877 } 2878 2879 sin = (struct sockaddr_in *)addr; 2880 lport = sin->sin_port; 2881 /* 2882 * For LOOPBACK the prison_local_ip4() call 2883 * will transmute the ip address to the 2884 * proper value. 2885 */ 2886 if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) { 2887 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2888 goto out; 2889 } 2890 if (sin->sin_addr.s_addr != INADDR_ANY) { 2891 bindall = 0; 2892 } 2893 break; 2894 } 2895 #endif 2896 #ifdef INET6 2897 case AF_INET6: 2898 { 2899 /* 2900 * Only for pure IPv6 Address. (No IPv4 2901 * Mapped!) 2902 */ 2903 struct sockaddr_in6 *sin6; 2904 2905 sin6 = (struct sockaddr_in6 *)addr; 2906 if (addr->sa_len != sizeof(*sin6)) { 2907 error = EINVAL; 2908 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2909 goto out; 2910 } 2911 lport = sin6->sin6_port; 2912 /* 2913 * For LOOPBACK the prison_local_ip6() call 2914 * will transmute the ipv6 address to the 2915 * proper value. 2916 */ 2917 if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr, 2918 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2919 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2920 goto out; 2921 } 2922 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2923 bindall = 0; 2924 /* KAME hack: embed scopeid */ 2925 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2926 error = EINVAL; 2927 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2928 goto out; 2929 } 2930 } 2931 /* this must be cleared for ifa_ifwithaddr() */ 2932 sin6->sin6_scope_id = 0; 2933 break; 2934 } 2935 #endif 2936 default: 2937 error = EAFNOSUPPORT; 2938 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2939 goto out; 2940 } 2941 } 2942 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2943 vrf_id = inp->def_vrf_id; 2944 2945 if (lport) { 2946 /* 2947 * Did the caller specify a port? if so we must see if an ep 2948 * already has this one bound. 2949 */ 2950 /* got to be root to get at low ports */ 2951 if (ntohs(lport) < IPPORT_RESERVED && 2952 (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 2953 goto out; 2954 } 2955 SCTP_INP_INCR_REF(inp); 2956 SCTP_INP_WUNLOCK(inp); 2957 if (bindall) { 2958 vrf_id = inp->def_vrf_id; 2959 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2960 if (inp_tmp != NULL) { 2961 /* 2962 * lock guy returned and lower count note 2963 * that we are not bound so inp_tmp should 2964 * NEVER be inp. And it is this inp 2965 * (inp_tmp) that gets the reference bump, 2966 * so we must lower it. 2967 */ 2968 SCTP_INP_DECR_REF(inp_tmp); 2969 /* unlock info */ 2970 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2971 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2972 /* 2973 * Ok, must be one-2-one and 2974 * allowing port re-use 2975 */ 2976 port_reuse_active = 1; 2977 goto continue_anyway; 2978 } 2979 SCTP_INP_WLOCK(inp); 2980 SCTP_INP_DECR_REF(inp); 2981 error = EADDRINUSE; 2982 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2983 goto out; 2984 } 2985 } else { 2986 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2987 if (inp_tmp != NULL) { 2988 /* 2989 * lock guy returned and lower count note 2990 * that we are not bound so inp_tmp should 2991 * NEVER be inp. And it is this inp 2992 * (inp_tmp) that gets the reference bump, 2993 * so we must lower it. 2994 */ 2995 SCTP_INP_DECR_REF(inp_tmp); 2996 /* unlock info */ 2997 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2998 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2999 /* 3000 * Ok, must be one-2-one and 3001 * allowing port re-use 3002 */ 3003 port_reuse_active = 1; 3004 goto continue_anyway; 3005 } 3006 SCTP_INP_WLOCK(inp); 3007 SCTP_INP_DECR_REF(inp); 3008 error = EADDRINUSE; 3009 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3010 goto out; 3011 } 3012 } 3013 continue_anyway: 3014 SCTP_INP_WLOCK(inp); 3015 SCTP_INP_DECR_REF(inp); 3016 if (bindall) { 3017 /* verify that no lport is not used by a singleton */ 3018 if ((port_reuse_active == 0) && 3019 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3020 /* Sorry someone already has this one bound */ 3021 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3022 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3023 port_reuse_active = 1; 3024 } else { 3025 error = EADDRINUSE; 3026 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3027 goto out; 3028 } 3029 } 3030 } 3031 } else { 3032 uint16_t first, last, candidate; 3033 uint16_t count; 3034 3035 if (ip_inp->inp_flags & INP_HIGHPORT) { 3036 first = MODULE_GLOBAL(ipport_hifirstauto); 3037 last = MODULE_GLOBAL(ipport_hilastauto); 3038 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3039 if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 3040 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3041 goto out; 3042 } 3043 first = MODULE_GLOBAL(ipport_lowfirstauto); 3044 last = MODULE_GLOBAL(ipport_lowlastauto); 3045 } else { 3046 first = MODULE_GLOBAL(ipport_firstauto); 3047 last = MODULE_GLOBAL(ipport_lastauto); 3048 } 3049 if (first > last) { 3050 uint16_t temp; 3051 3052 temp = first; 3053 first = last; 3054 last = temp; 3055 } 3056 count = last - first + 1; /* number of candidates */ 3057 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3058 3059 for (;;) { 3060 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3061 lport = htons(candidate); 3062 break; 3063 } 3064 if (--count == 0) { 3065 error = EADDRINUSE; 3066 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3067 goto out; 3068 } 3069 if (candidate == last) 3070 candidate = first; 3071 else 3072 candidate = candidate + 1; 3073 } 3074 } 3075 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3076 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3077 /* 3078 * this really should not happen. The guy did a non-blocking 3079 * bind and then did a close at the same time. 3080 */ 3081 error = EINVAL; 3082 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3083 goto out; 3084 } 3085 /* ok we look clear to give out this port, so lets setup the binding */ 3086 if (bindall) { 3087 /* binding to all addresses, so just set in the proper flags */ 3088 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3089 /* set the automatic addr changes from kernel flag */ 3090 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3091 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3092 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3093 } else { 3094 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3095 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3096 } 3097 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3098 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3099 } else { 3100 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3101 } 3102 /* 3103 * set the automatic mobility_base from kernel flag (by 3104 * micchie) 3105 */ 3106 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3107 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3109 } else { 3110 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3111 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3112 } 3113 /* 3114 * set the automatic mobility_fasthandoff from kernel flag 3115 * (by micchie) 3116 */ 3117 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3118 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3119 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3120 } else { 3121 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3122 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3123 } 3124 } else { 3125 /* 3126 * bind specific, make sure flags is off and add a new 3127 * address structure to the sctp_addr_list inside the ep 3128 * structure. 3129 * 3130 * We will need to allocate one and insert it at the head. 3131 * The socketopt call can just insert new addresses in there 3132 * as well. It will also have to do the embed scope kame 3133 * hack too (before adding). 3134 */ 3135 struct sctp_ifa *ifa; 3136 union sctp_sockstore store; 3137 3138 memset(&store, 0, sizeof(store)); 3139 switch (addr->sa_family) { 3140 #ifdef INET 3141 case AF_INET: 3142 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3143 store.sin.sin_port = 0; 3144 break; 3145 #endif 3146 #ifdef INET6 3147 case AF_INET6: 3148 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3149 store.sin6.sin6_port = 0; 3150 break; 3151 #endif 3152 default: 3153 break; 3154 } 3155 /* 3156 * first find the interface with the bound address need to 3157 * zero out the port to find the address! yuck! can't do 3158 * this earlier since need port for sctp_pcb_findep() 3159 */ 3160 if (sctp_ifap != NULL) { 3161 ifa = sctp_ifap; 3162 } else { 3163 /* 3164 * Note for BSD we hit here always other O/S's will 3165 * pass things in via the sctp_ifap argument. 3166 */ 3167 ifa = sctp_find_ifa_by_addr(&store.sa, 3168 vrf_id, SCTP_ADDR_NOT_LOCKED); 3169 } 3170 if (ifa == NULL) { 3171 error = EADDRNOTAVAIL; 3172 /* Can't find an interface with that address */ 3173 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3174 goto out; 3175 } 3176 #ifdef INET6 3177 if (addr->sa_family == AF_INET6) { 3178 /* GAK, more FIXME IFA lock? */ 3179 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3180 /* Can't bind a non-existent addr. */ 3181 error = EINVAL; 3182 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3183 goto out; 3184 } 3185 } 3186 #endif 3187 /* we're not bound all */ 3188 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3189 /* allow bindx() to send ASCONF's for binding changes */ 3190 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3191 /* clear automatic addr changes from kernel flag */ 3192 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3193 3194 /* add this address to the endpoint list */ 3195 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3196 if (error != 0) 3197 goto out; 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 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0, 3217 ("%s: inp %p is already bound", __func__, inp)); 3218 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3219 out: 3220 return (error); 3221 } 3222 3223 int 3224 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 3225 struct sctp_ifa *sctp_ifap, struct thread *td) 3226 { 3227 struct sctp_inpcb *inp; 3228 int error; 3229 3230 inp = so->so_pcb; 3231 SCTP_INP_INFO_WLOCK(); 3232 SCTP_INP_WLOCK(inp); 3233 error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td); 3234 SCTP_INP_WUNLOCK(inp); 3235 SCTP_INP_INFO_WUNLOCK(); 3236 return (error); 3237 } 3238 3239 static void 3240 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3241 { 3242 struct sctp_iterator *it, *nit; 3243 3244 /* 3245 * We enter with the only the ITERATOR_LOCK in place and a write 3246 * lock on the inp_info stuff. 3247 */ 3248 it = sctp_it_ctl.cur_it; 3249 if (it && (it->vn != curvnet)) { 3250 /* Its not looking at our VNET */ 3251 return; 3252 } 3253 if (it && (it->inp == inp)) { 3254 /* 3255 * This is tricky and we hold the iterator lock, but when it 3256 * returns and gets the lock (when we release it) the 3257 * iterator will try to operate on inp. We need to stop that 3258 * from happening. But of course the iterator has a 3259 * reference on the stcb and inp. We can mark it and it will 3260 * stop. 3261 * 3262 * If its a single iterator situation, we set the end 3263 * iterator flag. Otherwise we set the iterator to go to the 3264 * next inp. 3265 * 3266 */ 3267 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3268 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3269 } else { 3270 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3271 } 3272 } 3273 /* 3274 * Now go through and remove any single reference to our inp that 3275 * may be still pending on the list 3276 */ 3277 SCTP_IPI_ITERATOR_WQ_LOCK(); 3278 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3279 if (it->vn != curvnet) { 3280 continue; 3281 } 3282 if (it->inp == inp) { 3283 /* This one points to me is it inp specific? */ 3284 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3285 /* Remove and free this one */ 3286 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3287 it, sctp_nxt_itr); 3288 if (it->function_atend != NULL) { 3289 (*it->function_atend) (it->pointer, it->val); 3290 } 3291 SCTP_FREE(it, SCTP_M_ITER); 3292 } else { 3293 it->inp = LIST_NEXT(it->inp, sctp_list); 3294 if (it->inp) { 3295 SCTP_INP_INCR_REF(it->inp); 3296 } 3297 } 3298 /* 3299 * When its put in the refcnt is incremented so decr 3300 * it 3301 */ 3302 SCTP_INP_DECR_REF(inp); 3303 } 3304 } 3305 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3306 } 3307 3308 /* release sctp_inpcb unbind the port */ 3309 void 3310 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3311 { 3312 /* 3313 * Here we free a endpoint. We must find it (if it is in the Hash 3314 * table) and remove it from there. Then we must also find it in the 3315 * overall list and remove it from there. After all removals are 3316 * complete then any timer has to be stopped. Then start the actual 3317 * freeing. a) Any local lists. b) Any associations. c) The hash of 3318 * all associations. d) finally the ep itself. 3319 */ 3320 struct sctp_tcb *asoc, *nasoc; 3321 struct sctp_laddr *laddr, *nladdr; 3322 struct inpcb *ip_pcb; 3323 struct socket *so; 3324 int being_refed = 0; 3325 struct sctp_queued_to_read *sq, *nsq; 3326 int cnt; 3327 sctp_sharedkey_t *shared_key, *nshared_key; 3328 3329 #ifdef SCTP_LOG_CLOSING 3330 sctp_log_closing(inp, NULL, 0); 3331 #endif 3332 SCTP_ITERATOR_LOCK(); 3333 /* mark any iterators on the list or being processed */ 3334 sctp_iterator_inp_being_freed(inp); 3335 SCTP_ITERATOR_UNLOCK(); 3336 3337 SCTP_ASOC_CREATE_LOCK(inp); 3338 SCTP_INP_INFO_WLOCK(); 3339 SCTP_INP_WLOCK(inp); 3340 so = inp->sctp_socket; 3341 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0, 3342 ("%s: inp %p still has socket", __func__, inp)); 3343 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0, 3344 ("%s: double free of inp %p", __func__, inp)); 3345 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3346 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3347 /* socket is gone, so no more wakeups allowed */ 3348 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3349 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3350 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3351 } 3352 /* First time through we have the socket lock, after that no more. */ 3353 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3354 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3355 3356 if (inp->control) { 3357 sctp_m_freem(inp->control); 3358 inp->control = NULL; 3359 } 3360 if (inp->pkt) { 3361 sctp_m_freem(inp->pkt); 3362 inp->pkt = NULL; 3363 } 3364 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3365 * here but I will be nice :> (i.e. 3366 * ip_pcb = ep;) */ 3367 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3368 int cnt_in_sd; 3369 3370 cnt_in_sd = 0; 3371 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3372 SCTP_TCB_LOCK(asoc); 3373 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3374 asoc->sctp_socket = NULL; 3375 /* Skip guys being freed */ 3376 cnt_in_sd++; 3377 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3378 /* 3379 * Special case - we did not start a 3380 * kill timer on the asoc due to it 3381 * was not closed. So go ahead and 3382 * start it now. 3383 */ 3384 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3385 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3386 } 3387 SCTP_TCB_UNLOCK(asoc); 3388 continue; 3389 } 3390 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3391 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3392 (asoc->asoc.total_output_queue_size == 0)) { 3393 /* 3394 * If we have data in queue, we don't want 3395 * to just free since the app may have done, 3396 * send()/close or connect/send/close. And 3397 * it wants the data to get across first. 3398 */ 3399 /* Just abandon things in the front states */ 3400 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3401 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3402 cnt_in_sd++; 3403 } 3404 continue; 3405 } 3406 /* Disconnect the socket please */ 3407 asoc->sctp_socket = NULL; 3408 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3409 if ((asoc->asoc.size_on_reasm_queue > 0) || 3410 (asoc->asoc.control_pdapi) || 3411 (asoc->asoc.size_on_all_streams > 0) || 3412 (so && (so->so_rcv.sb_cc > 0))) { 3413 /* Left with Data unread */ 3414 struct mbuf *op_err; 3415 3416 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3417 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3418 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3419 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3420 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3421 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3422 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3423 } 3424 if (sctp_free_assoc(inp, asoc, 3425 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3426 cnt_in_sd++; 3427 } 3428 continue; 3429 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3430 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3431 (asoc->asoc.stream_queue_cnt == 0)) { 3432 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3433 goto abort_anyway; 3434 } 3435 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3436 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3437 struct sctp_nets *netp; 3438 3439 /* 3440 * there is nothing queued to send, 3441 * so I send shutdown 3442 */ 3443 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3444 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3445 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3446 } 3447 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3448 sctp_stop_timers_for_shutdown(asoc); 3449 if (asoc->asoc.alternate) { 3450 netp = asoc->asoc.alternate; 3451 } else { 3452 netp = asoc->asoc.primary_destination; 3453 } 3454 sctp_send_shutdown(asoc, netp); 3455 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3456 netp); 3457 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3458 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3459 } 3460 } else { 3461 /* mark into shutdown pending */ 3462 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3463 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3464 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3465 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3466 } 3467 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3468 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3469 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3470 struct mbuf *op_err; 3471 3472 abort_anyway: 3473 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3474 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3475 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3476 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3477 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3478 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3479 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3480 } 3481 if (sctp_free_assoc(inp, asoc, 3482 SCTP_PCBFREE_NOFORCE, 3483 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3484 cnt_in_sd++; 3485 } 3486 continue; 3487 } else { 3488 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3489 } 3490 } 3491 cnt_in_sd++; 3492 SCTP_TCB_UNLOCK(asoc); 3493 } 3494 /* now is there some left in our SHUTDOWN state? */ 3495 if (cnt_in_sd) { 3496 #ifdef SCTP_LOG_CLOSING 3497 sctp_log_closing(inp, NULL, 2); 3498 #endif 3499 inp->sctp_socket = NULL; 3500 SCTP_INP_WUNLOCK(inp); 3501 SCTP_ASOC_CREATE_UNLOCK(inp); 3502 SCTP_INP_INFO_WUNLOCK(); 3503 return; 3504 } 3505 } 3506 inp->sctp_socket = NULL; 3507 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3508 SCTP_PCB_FLAGS_UNBOUND) { 3509 /* 3510 * ok, this guy has been bound. It's port is somewhere in 3511 * the SCTP_BASE_INFO(hash table). Remove it! 3512 */ 3513 LIST_REMOVE(inp, sctp_hash); 3514 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3515 } 3516 3517 /* 3518 * If there is a timer running to kill us, forget it, since it may 3519 * have a contest on the INP lock.. which would cause us to die ... 3520 */ 3521 cnt = 0; 3522 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3523 SCTP_TCB_LOCK(asoc); 3524 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3525 /* Disconnect the socket please */ 3526 asoc->sctp_socket = NULL; 3527 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3528 } 3529 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3530 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3531 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3532 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3533 } 3534 cnt++; 3535 SCTP_TCB_UNLOCK(asoc); 3536 continue; 3537 } 3538 /* Free associations that are NOT killing us */ 3539 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3540 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3541 struct mbuf *op_err; 3542 3543 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3544 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3545 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3546 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3547 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3548 cnt++; 3549 SCTP_TCB_UNLOCK(asoc); 3550 continue; 3551 } 3552 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3553 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3554 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3555 } 3556 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3557 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3558 cnt++; 3559 } 3560 } 3561 if (cnt) { 3562 /* Ok we have someone out there that will kill us */ 3563 #ifdef SCTP_LOG_CLOSING 3564 sctp_log_closing(inp, NULL, 3); 3565 #endif 3566 SCTP_INP_WUNLOCK(inp); 3567 SCTP_ASOC_CREATE_UNLOCK(inp); 3568 SCTP_INP_INFO_WUNLOCK(); 3569 return; 3570 } 3571 if (SCTP_INP_LOCK_CONTENDED(inp)) 3572 being_refed++; 3573 if (SCTP_INP_READ_CONTENDED(inp)) 3574 being_refed++; 3575 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3576 being_refed++; 3577 /* NOTE: 0 refcount also means no timers are referencing us. */ 3578 if ((inp->refcount) || 3579 (being_refed) || 3580 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3581 #ifdef SCTP_LOG_CLOSING 3582 sctp_log_closing(inp, NULL, 4); 3583 #endif 3584 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3585 SCTP_INP_WUNLOCK(inp); 3586 SCTP_ASOC_CREATE_UNLOCK(inp); 3587 SCTP_INP_INFO_WUNLOCK(); 3588 return; 3589 } 3590 inp->sctp_ep.signature_change.type = 0; 3591 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3592 /* 3593 * Remove it from the list .. last thing we need a lock for. 3594 */ 3595 LIST_REMOVE(inp, sctp_list); 3596 SCTP_INP_WUNLOCK(inp); 3597 SCTP_ASOC_CREATE_UNLOCK(inp); 3598 SCTP_INP_INFO_WUNLOCK(); 3599 3600 #ifdef SCTP_LOG_CLOSING 3601 sctp_log_closing(inp, NULL, 5); 3602 #endif 3603 if ((inp->sctp_asocidhash) != NULL) { 3604 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3605 inp->sctp_asocidhash = NULL; 3606 } 3607 /* sa_ignore FREED_MEMORY */ 3608 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3609 /* Its only abandoned if it had data left */ 3610 if (sq->length) 3611 SCTP_STAT_INCR(sctps_left_abandon); 3612 3613 TAILQ_REMOVE(&inp->read_queue, sq, next); 3614 sctp_free_remote_addr(sq->whoFrom); 3615 if (so) 3616 so->so_rcv.sb_cc -= sq->length; 3617 if (sq->data) { 3618 sctp_m_freem(sq->data); 3619 sq->data = NULL; 3620 } 3621 /* 3622 * no need to free the net count, since at this point all 3623 * assoc's are gone. 3624 */ 3625 sctp_free_a_readq(NULL, sq); 3626 } 3627 /* Now the sctp_pcb things */ 3628 /* 3629 * free each asoc if it is not already closed/free. we can't use the 3630 * macro here since le_next will get freed as part of the 3631 * sctp_free_assoc() call. 3632 */ 3633 if (ip_pcb->inp_options) { 3634 (void)sctp_m_free(ip_pcb->inp_options); 3635 ip_pcb->inp_options = 0; 3636 } 3637 #ifdef INET6 3638 if (ip_pcb->inp_vflag & INP_IPV6) { 3639 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3640 } 3641 #endif /* INET6 */ 3642 ip_pcb->inp_vflag = 0; 3643 /* free up authentication fields */ 3644 if (inp->sctp_ep.local_auth_chunks != NULL) 3645 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3646 if (inp->sctp_ep.local_hmacs != NULL) 3647 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3648 3649 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3650 LIST_REMOVE(shared_key, next); 3651 sctp_free_sharedkey(shared_key); 3652 /* sa_ignore FREED_MEMORY */ 3653 } 3654 3655 /* 3656 * if we have an address list the following will free the list of 3657 * ifaddr's that are set into this ep. Again macro limitations here, 3658 * since the LIST_FOREACH could be a bad idea. 3659 */ 3660 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3661 sctp_remove_laddr(laddr); 3662 } 3663 3664 #ifdef SCTP_TRACK_FREED_ASOCS 3665 /* TEMP CODE */ 3666 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3667 LIST_REMOVE(asoc, sctp_tcblist); 3668 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3669 SCTP_DECR_ASOC_COUNT(); 3670 } 3671 /* *** END TEMP CODE *** */ 3672 #endif 3673 /* Now lets see about freeing the EP hash table. */ 3674 if (inp->sctp_tcbhash != NULL) { 3675 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3676 inp->sctp_tcbhash = NULL; 3677 } 3678 /* Now we must put the ep memory back into the zone pool */ 3679 crfree(inp->ip_inp.inp.inp_cred); 3680 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3681 SCTP_INP_LOCK_DESTROY(inp); 3682 SCTP_INP_READ_DESTROY(inp); 3683 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3684 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3685 SCTP_DECR_EP_COUNT(); 3686 } 3687 3688 struct sctp_nets * 3689 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3690 { 3691 struct sctp_nets *net; 3692 3693 /* locate the address */ 3694 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3695 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3696 return (net); 3697 } 3698 return (NULL); 3699 } 3700 3701 int 3702 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3703 { 3704 struct sctp_ifa *sctp_ifa; 3705 3706 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3707 if (sctp_ifa) { 3708 return (1); 3709 } else { 3710 return (0); 3711 } 3712 } 3713 3714 /* 3715 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3716 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3717 * stats of stuff. 3718 */ 3719 int 3720 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3721 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3722 { 3723 /* 3724 * The following is redundant to the same lines in the 3725 * sctp_aloc_assoc() but is needed since others call the add address 3726 * function 3727 */ 3728 struct sctp_nets *net, *netfirst; 3729 int addr_inscope; 3730 3731 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3732 from); 3733 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3734 3735 netfirst = sctp_findnet(stcb, newaddr); 3736 if (netfirst) { 3737 /* 3738 * Lie and return ok, we don't want to make the association 3739 * go away for this behavior. It will happen in the TCP 3740 * model in a connected socket. It does not reach the hash 3741 * table until after the association is built so it can't be 3742 * found. Mark as reachable, since the initial creation will 3743 * have been cleared and the NOT_IN_ASSOC flag will have 3744 * been added... and we don't want to end up removing it 3745 * back out. 3746 */ 3747 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3748 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3749 SCTP_ADDR_UNCONFIRMED); 3750 } else { 3751 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3752 } 3753 3754 return (0); 3755 } 3756 addr_inscope = 1; 3757 switch (newaddr->sa_family) { 3758 #ifdef INET 3759 case AF_INET: 3760 { 3761 struct sockaddr_in *sin; 3762 3763 sin = (struct sockaddr_in *)newaddr; 3764 if (sin->sin_addr.s_addr == 0) { 3765 /* Invalid address */ 3766 return (-1); 3767 } 3768 /* zero out the zero area */ 3769 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3770 3771 /* assure len is set */ 3772 sin->sin_len = sizeof(struct sockaddr_in); 3773 if (set_scope) { 3774 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3775 stcb->asoc.scope.ipv4_local_scope = 1; 3776 } 3777 } else { 3778 /* Validate the address is in scope */ 3779 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3780 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3781 addr_inscope = 0; 3782 } 3783 } 3784 break; 3785 } 3786 #endif 3787 #ifdef INET6 3788 case AF_INET6: 3789 { 3790 struct sockaddr_in6 *sin6; 3791 3792 sin6 = (struct sockaddr_in6 *)newaddr; 3793 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3794 /* Invalid address */ 3795 return (-1); 3796 } 3797 /* assure len is set */ 3798 sin6->sin6_len = sizeof(struct sockaddr_in6); 3799 if (set_scope) { 3800 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3801 stcb->asoc.scope.loopback_scope = 1; 3802 stcb->asoc.scope.local_scope = 0; 3803 stcb->asoc.scope.ipv4_local_scope = 1; 3804 stcb->asoc.scope.site_scope = 1; 3805 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3806 /* 3807 * If the new destination is a 3808 * LINK_LOCAL we must have common 3809 * site scope. Don't set the local 3810 * scope since we may not share all 3811 * links, only loopback can do this. 3812 * Links on the local network would 3813 * also be on our private network 3814 * for v4 too. 3815 */ 3816 stcb->asoc.scope.ipv4_local_scope = 1; 3817 stcb->asoc.scope.site_scope = 1; 3818 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3819 /* 3820 * If the new destination is 3821 * SITE_LOCAL then we must have site 3822 * scope in common. 3823 */ 3824 stcb->asoc.scope.site_scope = 1; 3825 } 3826 } else { 3827 /* Validate the address is in scope */ 3828 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3829 (stcb->asoc.scope.loopback_scope == 0)) { 3830 addr_inscope = 0; 3831 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3832 (stcb->asoc.scope.local_scope == 0)) { 3833 addr_inscope = 0; 3834 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3835 (stcb->asoc.scope.site_scope == 0)) { 3836 addr_inscope = 0; 3837 } 3838 } 3839 break; 3840 } 3841 #endif 3842 default: 3843 /* not supported family type */ 3844 return (-1); 3845 } 3846 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3847 if (net == NULL) { 3848 return (-1); 3849 } 3850 SCTP_INCR_RADDR_COUNT(); 3851 memset(net, 0, sizeof(struct sctp_nets)); 3852 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3853 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3854 switch (newaddr->sa_family) { 3855 #ifdef INET 3856 case AF_INET: 3857 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3858 break; 3859 #endif 3860 #ifdef INET6 3861 case AF_INET6: 3862 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3863 break; 3864 #endif 3865 default: 3866 break; 3867 } 3868 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3869 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3870 stcb->asoc.scope.loopback_scope = 1; 3871 stcb->asoc.scope.ipv4_local_scope = 1; 3872 stcb->asoc.scope.local_scope = 0; 3873 stcb->asoc.scope.site_scope = 1; 3874 addr_inscope = 1; 3875 } 3876 net->failure_threshold = stcb->asoc.def_net_failure; 3877 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3878 if (addr_inscope == 0) { 3879 net->dest_state = (SCTP_ADDR_REACHABLE | 3880 SCTP_ADDR_OUT_OF_SCOPE); 3881 } else { 3882 if (from == SCTP_ADDR_IS_CONFIRMED) 3883 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3884 net->dest_state = SCTP_ADDR_REACHABLE; 3885 else 3886 net->dest_state = SCTP_ADDR_REACHABLE | 3887 SCTP_ADDR_UNCONFIRMED; 3888 } 3889 /* 3890 * We set this to 0, the timer code knows that this means its an 3891 * initial value 3892 */ 3893 net->rto_needed = 1; 3894 net->RTO = 0; 3895 net->RTO_measured = 0; 3896 stcb->asoc.numnets++; 3897 net->ref_count = 1; 3898 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3899 net->port = port; 3900 net->dscp = stcb->asoc.default_dscp; 3901 #ifdef INET6 3902 net->flowlabel = stcb->asoc.default_flowlabel; 3903 #endif 3904 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3905 net->dest_state |= SCTP_ADDR_NOHB; 3906 } else { 3907 net->dest_state &= ~SCTP_ADDR_NOHB; 3908 } 3909 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3910 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3911 } else { 3912 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3913 } 3914 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3915 /* Init the timer structure */ 3916 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3917 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3918 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3919 3920 /* Now generate a route for this guy */ 3921 #ifdef INET6 3922 /* KAME hack: embed scopeid */ 3923 if (newaddr->sa_family == AF_INET6) { 3924 struct sockaddr_in6 *sin6; 3925 3926 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3927 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3928 sin6->sin6_scope_id = 0; 3929 } 3930 #endif 3931 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3932 stcb->asoc.vrf_id, 3933 stcb->sctp_ep->fibnum); 3934 3935 net->src_addr_selected = 0; 3936 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3937 /* Get source address */ 3938 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3939 stcb, 3940 (sctp_route_t *)&net->ro, 3941 net, 3942 0, 3943 stcb->asoc.vrf_id); 3944 if (stcb->asoc.default_mtu > 0) { 3945 net->mtu = stcb->asoc.default_mtu; 3946 switch (net->ro._l_addr.sa.sa_family) { 3947 #ifdef INET 3948 case AF_INET: 3949 net->mtu += SCTP_MIN_V4_OVERHEAD; 3950 break; 3951 #endif 3952 #ifdef INET6 3953 case AF_INET6: 3954 net->mtu += SCTP_MIN_OVERHEAD; 3955 break; 3956 #endif 3957 default: 3958 break; 3959 } 3960 #if defined(INET) || defined(INET6) 3961 if (net->port) { 3962 net->mtu += (uint32_t)sizeof(struct udphdr); 3963 } 3964 #endif 3965 } else if (net->ro._s_addr != NULL) { 3966 uint32_t imtu, rmtu, hcmtu; 3967 3968 net->src_addr_selected = 1; 3969 /* Now get the interface MTU */ 3970 if (net->ro._s_addr->ifn_p != NULL) { 3971 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3972 } else { 3973 imtu = 0; 3974 } 3975 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 3976 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3977 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3978 } 3979 } 3980 if (net->mtu == 0) { 3981 if (stcb->asoc.default_mtu > 0) { 3982 net->mtu = stcb->asoc.default_mtu; 3983 switch (net->ro._l_addr.sa.sa_family) { 3984 #ifdef INET 3985 case AF_INET: 3986 net->mtu += SCTP_MIN_V4_OVERHEAD; 3987 break; 3988 #endif 3989 #ifdef INET6 3990 case AF_INET6: 3991 net->mtu += SCTP_MIN_OVERHEAD; 3992 break; 3993 #endif 3994 default: 3995 break; 3996 } 3997 #if defined(INET) || defined(INET6) 3998 if (net->port) { 3999 net->mtu += (uint32_t)sizeof(struct udphdr); 4000 } 4001 #endif 4002 } else { 4003 switch (newaddr->sa_family) { 4004 #ifdef INET 4005 case AF_INET: 4006 net->mtu = SCTP_DEFAULT_MTU; 4007 break; 4008 #endif 4009 #ifdef INET6 4010 case AF_INET6: 4011 net->mtu = 1280; 4012 break; 4013 #endif 4014 default: 4015 break; 4016 } 4017 } 4018 } 4019 #if defined(INET) || defined(INET6) 4020 if (net->port) { 4021 net->mtu -= (uint32_t)sizeof(struct udphdr); 4022 } 4023 #endif 4024 if (from == SCTP_ALLOC_ASOC) { 4025 stcb->asoc.smallest_mtu = net->mtu; 4026 } 4027 if (stcb->asoc.smallest_mtu > net->mtu) { 4028 sctp_pathmtu_adjustment(stcb, net->mtu); 4029 } 4030 #ifdef INET6 4031 if (newaddr->sa_family == AF_INET6) { 4032 struct sockaddr_in6 *sin6; 4033 4034 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4035 (void)sa6_recoverscope(sin6); 4036 } 4037 #endif 4038 4039 /* JRS - Use the congestion control given in the CC module */ 4040 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4041 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4042 4043 /* 4044 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4045 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4046 */ 4047 net->find_pseudo_cumack = 1; 4048 net->find_rtx_pseudo_cumack = 1; 4049 /* Choose an initial flowid. */ 4050 net->flowid = stcb->asoc.my_vtag ^ 4051 ntohs(stcb->rport) ^ 4052 ntohs(stcb->sctp_ep->sctp_lport); 4053 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4054 if (netp) { 4055 *netp = net; 4056 } 4057 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4058 if (net->ro.ro_nh == NULL) { 4059 /* Since we have no route put it at the back */ 4060 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4061 } else if (netfirst == NULL) { 4062 /* We are the first one in the pool. */ 4063 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4064 } else if (netfirst->ro.ro_nh == NULL) { 4065 /* 4066 * First one has NO route. Place this one ahead of the first 4067 * one. 4068 */ 4069 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4070 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4071 /* 4072 * This one has a different interface than the one at the 4073 * top of the list. Place it ahead. 4074 */ 4075 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4076 } else { 4077 /* 4078 * Ok we have the same interface as the first one. Move 4079 * forward until we find either a) one with a NULL route... 4080 * insert ahead of that b) one with a different ifp.. insert 4081 * after that. c) end of the list.. insert at the tail. 4082 */ 4083 struct sctp_nets *netlook; 4084 4085 do { 4086 netlook = TAILQ_NEXT(netfirst, sctp_next); 4087 if (netlook == NULL) { 4088 /* End of the list */ 4089 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4090 break; 4091 } else if (netlook->ro.ro_nh == NULL) { 4092 /* next one has NO route */ 4093 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4094 break; 4095 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4096 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4097 net, sctp_next); 4098 break; 4099 } 4100 /* Shift forward */ 4101 netfirst = netlook; 4102 } while (netlook != NULL); 4103 } 4104 4105 /* got to have a primary set */ 4106 if (stcb->asoc.primary_destination == 0) { 4107 stcb->asoc.primary_destination = net; 4108 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4109 (net->ro.ro_nh) && 4110 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4111 /* No route to current primary adopt new primary */ 4112 stcb->asoc.primary_destination = net; 4113 } 4114 /* Validate primary is first */ 4115 net = TAILQ_FIRST(&stcb->asoc.nets); 4116 if ((net != stcb->asoc.primary_destination) && 4117 (stcb->asoc.primary_destination)) { 4118 /* 4119 * first one on the list is NOT the primary sctp_cmpaddr() 4120 * is much more efficient if the primary is the first on the 4121 * list, make it so. 4122 */ 4123 TAILQ_REMOVE(&stcb->asoc.nets, 4124 stcb->asoc.primary_destination, sctp_next); 4125 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4126 stcb->asoc.primary_destination, sctp_next); 4127 } 4128 return (0); 4129 } 4130 4131 static uint32_t 4132 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4133 { 4134 uint32_t id; 4135 struct sctpasochead *head; 4136 struct sctp_tcb *lstcb; 4137 4138 try_again: 4139 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4140 /* TSNH */ 4141 return (0); 4142 } 4143 /* 4144 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4145 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4146 */ 4147 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4148 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4149 } 4150 id = inp->sctp_associd_counter; 4151 inp->sctp_associd_counter++; 4152 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4153 if (lstcb) { 4154 goto try_again; 4155 } 4156 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4157 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4158 stcb->asoc.in_asocid_hash = 1; 4159 return (id); 4160 } 4161 4162 /* 4163 * allocate an association and add it to the endpoint. The caller must be 4164 * careful to add all additional addresses once they are know right away or 4165 * else the assoc will be may experience a blackout scenario. 4166 */ 4167 static struct sctp_tcb * 4168 sctp_aloc_assoc_locked(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4169 int *error, uint32_t override_tag, uint32_t initial_tsn, 4170 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4171 struct thread *p, 4172 int initialize_auth_params) 4173 { 4174 /* note the p argument is only valid in unbound sockets */ 4175 4176 struct sctp_tcb *stcb; 4177 struct sctp_association *asoc; 4178 struct sctpasochead *head; 4179 uint16_t rport; 4180 int err; 4181 4182 SCTP_INP_INFO_WLOCK_ASSERT(); 4183 SCTP_INP_WLOCK_ASSERT(inp); 4184 4185 /* 4186 * Assumption made here: Caller has done a 4187 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4188 * address does not exist already. 4189 */ 4190 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4191 /* Hit max assoc, sorry no more */ 4192 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4193 *error = ENOBUFS; 4194 return (NULL); 4195 } 4196 if (firstaddr == NULL) { 4197 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4198 *error = EINVAL; 4199 return (NULL); 4200 } 4201 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4203 *error = EINVAL; 4204 return (NULL); 4205 } 4206 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4207 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4208 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4209 /* 4210 * If its in the TCP pool, its NOT allowed to create an 4211 * association. The parent listener needs to call 4212 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4213 * off, or connected one does this.. its an error. 4214 */ 4215 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4216 *error = EINVAL; 4217 return (NULL); 4218 } 4219 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4220 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4221 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4222 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4223 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4224 *error = EINVAL; 4225 return (NULL); 4226 } 4227 } 4228 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4229 #ifdef SCTP_DEBUG 4230 if (firstaddr) { 4231 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4232 switch (firstaddr->sa_family) { 4233 #ifdef INET 4234 case AF_INET: 4235 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4236 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4237 break; 4238 #endif 4239 #ifdef INET6 4240 case AF_INET6: 4241 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4242 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4243 break; 4244 #endif 4245 default: 4246 break; 4247 } 4248 } else { 4249 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4250 } 4251 #endif /* SCTP_DEBUG */ 4252 switch (firstaddr->sa_family) { 4253 #ifdef INET 4254 case AF_INET: 4255 { 4256 struct sockaddr_in *sin; 4257 4258 sin = (struct sockaddr_in *)firstaddr; 4259 if ((ntohs(sin->sin_port) == 0) || 4260 (sin->sin_addr.s_addr == INADDR_ANY) || 4261 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4262 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) || 4263 (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) != 0) && 4264 (SCTP_IPV6_V6ONLY(inp) != 0))) { 4265 /* Invalid address */ 4266 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4267 *error = EINVAL; 4268 return (NULL); 4269 } 4270 rport = sin->sin_port; 4271 break; 4272 } 4273 #endif 4274 #ifdef INET6 4275 case AF_INET6: 4276 { 4277 struct sockaddr_in6 *sin6; 4278 4279 sin6 = (struct sockaddr_in6 *)firstaddr; 4280 if ((ntohs(sin6->sin6_port) == 0) || 4281 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4282 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) || 4283 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) { 4284 /* Invalid address */ 4285 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4286 *error = EINVAL; 4287 return (NULL); 4288 } 4289 rport = sin6->sin6_port; 4290 break; 4291 } 4292 #endif 4293 default: 4294 /* not supported family type */ 4295 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4296 *error = EINVAL; 4297 return (NULL); 4298 } 4299 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4300 /* 4301 * If you have not performed a bind, then we need to do the 4302 * ephemeral bind for you. 4303 */ 4304 if ((err = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) { 4305 /* bind error, probably perm */ 4306 *error = err; 4307 return (NULL); 4308 } 4309 } 4310 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4311 if (stcb == NULL) { 4312 /* out of memory? */ 4313 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4314 *error = ENOMEM; 4315 return (NULL); 4316 } 4317 SCTP_INCR_ASOC_COUNT(); 4318 4319 memset(stcb, 0, sizeof(*stcb)); 4320 asoc = &stcb->asoc; 4321 4322 SCTP_TCB_LOCK_INIT(stcb); 4323 SCTP_TCB_SEND_LOCK_INIT(stcb); 4324 stcb->rport = rport; 4325 /* setup back pointer's */ 4326 stcb->sctp_ep = inp; 4327 stcb->sctp_socket = inp->sctp_socket; 4328 if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) { 4329 /* failed */ 4330 SCTP_TCB_LOCK_DESTROY(stcb); 4331 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4332 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4333 SCTP_DECR_ASOC_COUNT(); 4334 *error = err; 4335 return (NULL); 4336 } 4337 SCTP_TCB_LOCK(stcb); 4338 4339 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4340 /* now that my_vtag is set, add it to the hash */ 4341 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4342 /* put it in the bucket in the vtag hash of assoc's for the system */ 4343 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4344 4345 if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) { 4346 /* failure.. memory error? */ 4347 if (asoc->strmout) { 4348 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4349 asoc->strmout = NULL; 4350 } 4351 if (asoc->mapping_array) { 4352 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4353 asoc->mapping_array = NULL; 4354 } 4355 if (asoc->nr_mapping_array) { 4356 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4357 asoc->nr_mapping_array = NULL; 4358 } 4359 SCTP_DECR_ASOC_COUNT(); 4360 SCTP_TCB_UNLOCK(stcb); 4361 SCTP_TCB_LOCK_DESTROY(stcb); 4362 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4363 LIST_REMOVE(stcb, sctp_asocs); 4364 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4365 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4366 SCTP_INP_WUNLOCK(inp); 4367 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4368 *error = ENOBUFS; 4369 return (NULL); 4370 } 4371 /* Init all the timers */ 4372 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4373 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4374 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4375 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4376 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4377 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4378 4379 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4380 /* now file the port under the hash as well */ 4381 if (inp->sctp_tcbhash != NULL) { 4382 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4383 inp->sctp_hashmark)]; 4384 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4385 } 4386 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4387 sctp_initialize_auth_params(inp, stcb); 4388 } 4389 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4390 return (stcb); 4391 } 4392 4393 struct sctp_tcb * 4394 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4395 int *error, uint32_t override_tag, uint32_t initial_tsn, 4396 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4397 struct thread *p, 4398 int initialize_auth_params) 4399 { 4400 struct sctp_tcb *stcb; 4401 4402 SCTP_INP_INFO_WLOCK(); 4403 SCTP_INP_WLOCK(inp); 4404 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4405 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4406 SCTP_INP_INFO_WUNLOCK(); 4407 SCTP_INP_WUNLOCK(inp); 4408 return (stcb); 4409 } 4410 4411 struct sctp_tcb * 4412 sctp_aloc_assoc_connected(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4413 int *error, uint32_t override_tag, uint32_t initial_tsn, 4414 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4415 struct thread *p, 4416 int initialize_auth_params) 4417 { 4418 struct sctp_tcb *stcb; 4419 4420 SCTP_INP_INFO_WLOCK(); 4421 SCTP_INP_WLOCK(inp); 4422 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 4423 SCTP_IS_LISTENING(inp)) { 4424 SCTP_INP_INFO_WUNLOCK(); 4425 SCTP_INP_WUNLOCK(inp); 4426 *error = EINVAL; 4427 return (NULL); 4428 } 4429 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4430 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4431 SCTP_INP_INFO_WUNLOCK(); 4432 if (stcb != NULL && (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4433 inp->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 4434 soisconnecting(inp->sctp_socket); 4435 } 4436 SCTP_INP_WUNLOCK(inp); 4437 return (stcb); 4438 } 4439 4440 void 4441 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4442 { 4443 struct sctp_inpcb *inp; 4444 struct sctp_association *asoc; 4445 4446 inp = stcb->sctp_ep; 4447 asoc = &stcb->asoc; 4448 asoc->numnets--; 4449 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4450 if (net == asoc->primary_destination) { 4451 /* Reset primary */ 4452 struct sctp_nets *lnet; 4453 4454 lnet = TAILQ_FIRST(&asoc->nets); 4455 /* 4456 * Mobility adaptation Ideally, if deleted destination is 4457 * the primary, it becomes a fast retransmission trigger by 4458 * the subsequent SET PRIMARY. (by micchie) 4459 */ 4460 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4461 SCTP_MOBILITY_BASE) || 4462 sctp_is_mobility_feature_on(stcb->sctp_ep, 4463 SCTP_MOBILITY_FASTHANDOFF)) { 4464 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4465 if (asoc->deleted_primary != NULL) { 4466 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4467 goto out; 4468 } 4469 asoc->deleted_primary = net; 4470 atomic_add_int(&net->ref_count, 1); 4471 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4472 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4473 sctp_mobility_feature_on(stcb->sctp_ep, 4474 SCTP_MOBILITY_PRIM_DELETED); 4475 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4476 stcb->sctp_ep, stcb, NULL); 4477 } 4478 out: 4479 /* Try to find a confirmed primary */ 4480 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4481 } 4482 if (net == asoc->last_data_chunk_from) { 4483 /* Reset primary */ 4484 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4485 } 4486 if (net == asoc->last_control_chunk_from) { 4487 /* Clear net */ 4488 asoc->last_control_chunk_from = NULL; 4489 } 4490 if (net == asoc->last_net_cmt_send_started) { 4491 /* Clear net */ 4492 asoc->last_net_cmt_send_started = NULL; 4493 } 4494 if (net == stcb->asoc.alternate) { 4495 sctp_free_remote_addr(stcb->asoc.alternate); 4496 stcb->asoc.alternate = NULL; 4497 } 4498 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4499 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4500 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4501 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4502 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4503 sctp_free_remote_addr(net); 4504 } 4505 4506 /* 4507 * remove a remote endpoint address from an association, it will fail if the 4508 * address does not exist. 4509 */ 4510 int 4511 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4512 { 4513 /* 4514 * Here we need to remove a remote address. This is quite simple, we 4515 * first find it in the list of address for the association 4516 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4517 * on that item. Note we do not allow it to be removed if there are 4518 * no other addresses. 4519 */ 4520 struct sctp_association *asoc; 4521 struct sctp_nets *net, *nnet; 4522 4523 asoc = &stcb->asoc; 4524 4525 /* locate the address */ 4526 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4527 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4528 continue; 4529 } 4530 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4531 remaddr)) { 4532 /* we found the guy */ 4533 if (asoc->numnets < 2) { 4534 /* Must have at LEAST two remote addresses */ 4535 return (-1); 4536 } else { 4537 sctp_remove_net(stcb, net); 4538 return (0); 4539 } 4540 } 4541 } 4542 /* not found. */ 4543 return (-2); 4544 } 4545 4546 static bool 4547 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport, uint32_t now) 4548 { 4549 struct sctpvtaghead *chain; 4550 struct sctp_tagblock *twait_block; 4551 int i; 4552 4553 SCTP_INP_INFO_LOCK_ASSERT(); 4554 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4555 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4556 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4557 if ((twait_block->vtag_block[i].tv_sec_at_expire >= now) && 4558 (twait_block->vtag_block[i].v_tag == tag) && 4559 (twait_block->vtag_block[i].lport == lport) && 4560 (twait_block->vtag_block[i].rport == rport)) { 4561 return (true); 4562 } 4563 } 4564 } 4565 return (false); 4566 } 4567 4568 static void 4569 sctp_set_vtag_block(struct sctp_timewait *vtag_block, uint32_t time, 4570 uint32_t tag, uint16_t lport, uint16_t rport) 4571 { 4572 vtag_block->tv_sec_at_expire = time; 4573 vtag_block->v_tag = tag; 4574 vtag_block->lport = lport; 4575 vtag_block->rport = rport; 4576 } 4577 4578 static void 4579 sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4580 { 4581 struct sctpvtaghead *chain; 4582 struct sctp_tagblock *twait_block; 4583 struct timeval now; 4584 uint32_t time; 4585 int i; 4586 bool set; 4587 4588 SCTP_INP_INFO_WLOCK_ASSERT(); 4589 (void)SCTP_GETTIME_TIMEVAL(&now); 4590 time = (uint32_t)now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait); 4591 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4592 set = false; 4593 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4594 /* Block(s) present, lets find space, and expire on the fly */ 4595 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4596 if ((twait_block->vtag_block[i].v_tag == 0) && !set) { 4597 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4598 set = true; 4599 continue; 4600 } 4601 if ((twait_block->vtag_block[i].v_tag != 0) && 4602 (twait_block->vtag_block[i].tv_sec_at_expire < (uint32_t)now.tv_sec)) { 4603 if (set) { 4604 /* Audit expires this guy */ 4605 sctp_set_vtag_block(twait_block->vtag_block + i, 0, 0, 0, 0); 4606 } else { 4607 /* Reuse it for the new tag */ 4608 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4609 set = true; 4610 } 4611 } 4612 } 4613 if (set) { 4614 /* 4615 * We only do up to the block where we can place our 4616 * tag for audits 4617 */ 4618 break; 4619 } 4620 } 4621 /* Need to add a new block to chain */ 4622 if (!set) { 4623 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4624 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4625 if (twait_block == NULL) { 4626 return; 4627 } 4628 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4629 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4630 sctp_set_vtag_block(twait_block->vtag_block, time, tag, lport, rport); 4631 } 4632 } 4633 4634 void 4635 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4636 { 4637 struct sctp_tmit_chunk *chk, *nchk; 4638 struct sctp_queued_to_read *control, *ncontrol; 4639 4640 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4641 TAILQ_REMOVE(rh, control, next_instrm); 4642 control->on_strm_q = 0; 4643 if (control->on_read_q == 0) { 4644 sctp_free_remote_addr(control->whoFrom); 4645 if (control->data) { 4646 sctp_m_freem(control->data); 4647 control->data = NULL; 4648 } 4649 } 4650 /* Reassembly free? */ 4651 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4652 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4653 if (chk->data) { 4654 sctp_m_freem(chk->data); 4655 chk->data = NULL; 4656 } 4657 if (chk->holds_key_ref) 4658 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4659 sctp_free_remote_addr(chk->whoTo); 4660 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4661 SCTP_DECR_CHK_COUNT(); 4662 /* sa_ignore FREED_MEMORY */ 4663 } 4664 /* 4665 * We don't free the address here since all the net's were 4666 * freed above. 4667 */ 4668 if (control->on_read_q == 0) { 4669 sctp_free_a_readq(stcb, control); 4670 } 4671 } 4672 } 4673 4674 /*- 4675 * Free the association after un-hashing the remote port. This 4676 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4677 * expect that the input to this function IS a locked TCB. 4678 * It will return 0, if it did NOT destroy the association (instead 4679 * it unlocks it. It will return NON-zero if it either destroyed the 4680 * association OR the association is already destroyed. 4681 */ 4682 int 4683 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4684 { 4685 int i; 4686 struct sctp_association *asoc; 4687 struct sctp_nets *net, *nnet; 4688 struct sctp_laddr *laddr, *naddr; 4689 struct sctp_tmit_chunk *chk, *nchk; 4690 struct sctp_asconf_addr *aparam, *naparam; 4691 struct sctp_asconf_ack *aack, *naack; 4692 struct sctp_stream_reset_list *strrst, *nstrrst; 4693 struct sctp_queued_to_read *sq, *nsq; 4694 struct sctp_stream_queue_pending *sp, *nsp; 4695 sctp_sharedkey_t *shared_key, *nshared_key; 4696 struct socket *so; 4697 4698 /* first, lets purge the entry from the hash table. */ 4699 4700 #ifdef SCTP_LOG_CLOSING 4701 sctp_log_closing(inp, stcb, 6); 4702 #endif 4703 if (stcb->asoc.state == 0) { 4704 #ifdef SCTP_LOG_CLOSING 4705 sctp_log_closing(inp, NULL, 7); 4706 #endif 4707 /* there is no asoc, really TSNH :-0 */ 4708 return (1); 4709 } 4710 SCTP_TCB_SEND_LOCK(stcb); 4711 if (stcb->asoc.alternate) { 4712 sctp_free_remote_addr(stcb->asoc.alternate); 4713 stcb->asoc.alternate = NULL; 4714 } 4715 /* TEMP CODE */ 4716 if (stcb->freed_from_where == 0) { 4717 /* Only record the first place free happened from */ 4718 stcb->freed_from_where = from_location; 4719 } 4720 /* TEMP CODE */ 4721 4722 asoc = &stcb->asoc; 4723 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4724 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4725 /* nothing around */ 4726 so = NULL; 4727 else 4728 so = inp->sctp_socket; 4729 4730 /* 4731 * We used timer based freeing if a reader or writer is in the way. 4732 * So we first check if we are actually being called from a timer, 4733 * if so we abort early if a reader or writer is still in the way. 4734 */ 4735 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4736 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4737 /* 4738 * is it the timer driving us? if so are the reader/writers 4739 * gone? 4740 */ 4741 if (stcb->asoc.refcnt) { 4742 /* nope, reader or writer in the way */ 4743 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4744 /* no asoc destroyed */ 4745 SCTP_TCB_SEND_UNLOCK(stcb); 4746 SCTP_TCB_UNLOCK(stcb); 4747 #ifdef SCTP_LOG_CLOSING 4748 sctp_log_closing(inp, stcb, 8); 4749 #endif 4750 return (0); 4751 } 4752 } 4753 /* Now clean up any other timers */ 4754 sctp_stop_association_timers(stcb, false); 4755 /* Now the read queue needs to be cleaned up (only once) */ 4756 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4757 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4758 SCTP_INP_READ_LOCK(inp); 4759 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4760 if (sq->stcb == stcb) { 4761 sq->do_not_ref_stcb = 1; 4762 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4763 /* 4764 * If there is no end, there never will be 4765 * now. 4766 */ 4767 if (sq->end_added == 0) { 4768 /* Held for PD-API clear that. */ 4769 sq->pdapi_aborted = 1; 4770 sq->held_length = 0; 4771 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4772 /* 4773 * Need to add a PD-API 4774 * aborted indication. 4775 * Setting the control_pdapi 4776 * assures that it will be 4777 * added right after this 4778 * msg. 4779 */ 4780 uint32_t strseq; 4781 4782 stcb->asoc.control_pdapi = sq; 4783 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4784 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4785 stcb, 4786 SCTP_PARTIAL_DELIVERY_ABORTED, 4787 (void *)&strseq, 4788 SCTP_SO_LOCKED); 4789 stcb->asoc.control_pdapi = NULL; 4790 } 4791 } 4792 /* Add an end to wake them */ 4793 sq->end_added = 1; 4794 } 4795 } 4796 SCTP_INP_READ_UNLOCK(inp); 4797 if (stcb->block_entry) { 4798 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4799 stcb->block_entry->error = ECONNRESET; 4800 stcb->block_entry = NULL; 4801 } 4802 } 4803 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4804 /* 4805 * Someone holds a reference OR the socket is unaccepted 4806 * yet. 4807 */ 4808 if ((stcb->asoc.refcnt) || 4809 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4810 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4811 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4812 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4813 } 4814 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4815 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4816 /* nothing around */ 4817 so = NULL; 4818 if (so) { 4819 /* Wake any reader/writers */ 4820 sctp_sorwakeup(inp, so); 4821 sctp_sowwakeup(inp, so); 4822 } 4823 SCTP_TCB_SEND_UNLOCK(stcb); 4824 SCTP_TCB_UNLOCK(stcb); 4825 4826 #ifdef SCTP_LOG_CLOSING 4827 sctp_log_closing(inp, stcb, 9); 4828 #endif 4829 /* no asoc destroyed */ 4830 return (0); 4831 } 4832 #ifdef SCTP_LOG_CLOSING 4833 sctp_log_closing(inp, stcb, 10); 4834 #endif 4835 /* 4836 * When I reach here, no others want to kill the assoc yet.. and I 4837 * own the lock. Now its possible an abort comes in when I do the 4838 * lock exchange below to grab all the locks to do the final take 4839 * out. to prevent this we increment the count, which will start a 4840 * timer and blow out above thus assuring us that we hold exclusive 4841 * killing of the asoc. Note that after getting back the TCB lock we 4842 * will go ahead and increment the counter back up and stop any 4843 * timer a passing stranger may have started :-S 4844 */ 4845 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4846 atomic_add_int(&stcb->asoc.refcnt, 1); 4847 4848 SCTP_TCB_SEND_UNLOCK(stcb); 4849 SCTP_TCB_UNLOCK(stcb); 4850 SCTP_INP_INFO_WLOCK(); 4851 SCTP_INP_WLOCK(inp); 4852 SCTP_TCB_LOCK(stcb); 4853 SCTP_TCB_SEND_LOCK(stcb); 4854 } 4855 /* Double check the GONE flag */ 4856 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4857 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4858 /* nothing around */ 4859 so = NULL; 4860 4861 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4862 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4863 /* 4864 * For TCP type we need special handling when we are 4865 * connected. We also include the peel'ed off ones to. 4866 */ 4867 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4868 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4869 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4870 if (so) { 4871 SOCKBUF_LOCK(&so->so_rcv); 4872 so->so_state &= ~(SS_ISCONNECTING | 4873 SS_ISDISCONNECTING | 4874 SS_ISCONFIRMING | 4875 SS_ISCONNECTED); 4876 so->so_state |= SS_ISDISCONNECTED; 4877 socantrcvmore_locked(so); 4878 socantsendmore(so); 4879 sctp_sowwakeup(inp, so); 4880 sctp_sorwakeup(inp, so); 4881 SCTP_SOWAKEUP(so); 4882 } 4883 } 4884 } 4885 4886 /* 4887 * Make it invalid too, that way if its about to run it will abort 4888 * and return. 4889 */ 4890 /* re-increment the lock */ 4891 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4892 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4893 } 4894 if (stcb->asoc.refcnt) { 4895 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4896 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4897 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4898 SCTP_INP_INFO_WUNLOCK(); 4899 SCTP_INP_WUNLOCK(inp); 4900 } 4901 SCTP_TCB_SEND_UNLOCK(stcb); 4902 SCTP_TCB_UNLOCK(stcb); 4903 return (0); 4904 } 4905 asoc->state = 0; 4906 if (inp->sctp_tcbhash) { 4907 LIST_REMOVE(stcb, sctp_tcbhash); 4908 } 4909 if (stcb->asoc.in_asocid_hash) { 4910 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4911 } 4912 if (inp->sctp_socket == NULL) { 4913 stcb->sctp_socket = NULL; 4914 } 4915 /* Now lets remove it from the list of ALL associations in the EP */ 4916 LIST_REMOVE(stcb, sctp_tcblist); 4917 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4918 SCTP_INP_INCR_REF(inp); 4919 SCTP_INP_WUNLOCK(inp); 4920 } 4921 /* pull from vtag hash */ 4922 LIST_REMOVE(stcb, sctp_asocs); 4923 sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport); 4924 4925 /* 4926 * Now restop the timers to be sure this is paranoia at is finest! 4927 */ 4928 sctp_stop_association_timers(stcb, true); 4929 4930 /* 4931 * The chunk lists and such SHOULD be empty but we check them just 4932 * in case. 4933 */ 4934 /* anything on the wheel needs to be removed */ 4935 for (i = 0; i < asoc->streamoutcnt; i++) { 4936 struct sctp_stream_out *outs; 4937 4938 outs = &asoc->strmout[i]; 4939 /* now clean up any chunks here */ 4940 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4941 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4942 TAILQ_REMOVE(&outs->outqueue, sp, next); 4943 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp); 4944 sctp_free_spbufspace(stcb, asoc, sp); 4945 if (sp->data) { 4946 if (so) { 4947 /* Still an open socket - report */ 4948 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4949 0, (void *)sp, SCTP_SO_LOCKED); 4950 } 4951 if (sp->data) { 4952 sctp_m_freem(sp->data); 4953 sp->data = NULL; 4954 sp->tail_mbuf = NULL; 4955 sp->length = 0; 4956 } 4957 } 4958 if (sp->net) { 4959 sctp_free_remote_addr(sp->net); 4960 sp->net = NULL; 4961 } 4962 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4963 } 4964 } 4965 /* sa_ignore FREED_MEMORY */ 4966 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4967 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4968 SCTP_FREE(strrst, SCTP_M_STRESET); 4969 } 4970 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4971 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4972 if (sq->data) { 4973 sctp_m_freem(sq->data); 4974 sq->data = NULL; 4975 } 4976 sctp_free_remote_addr(sq->whoFrom); 4977 sq->whoFrom = NULL; 4978 sq->stcb = NULL; 4979 /* Free the ctl entry */ 4980 sctp_free_a_readq(stcb, sq); 4981 /* sa_ignore FREED_MEMORY */ 4982 } 4983 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4984 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4985 if (chk->data) { 4986 sctp_m_freem(chk->data); 4987 chk->data = NULL; 4988 } 4989 if (chk->holds_key_ref) 4990 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4991 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4992 SCTP_DECR_CHK_COUNT(); 4993 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4994 asoc->free_chunk_cnt--; 4995 /* sa_ignore FREED_MEMORY */ 4996 } 4997 /* pending send queue SHOULD be empty */ 4998 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4999 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5000 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5001 #ifdef INVARIANTS 5002 } else { 5003 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5004 #endif 5005 } 5006 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5007 if (chk->data) { 5008 if (so) { 5009 /* Still a socket? */ 5010 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5011 0, chk, SCTP_SO_LOCKED); 5012 } 5013 if (chk->data) { 5014 sctp_m_freem(chk->data); 5015 chk->data = NULL; 5016 } 5017 } 5018 if (chk->holds_key_ref) 5019 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5020 if (chk->whoTo) { 5021 sctp_free_remote_addr(chk->whoTo); 5022 chk->whoTo = NULL; 5023 } 5024 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5025 SCTP_DECR_CHK_COUNT(); 5026 /* sa_ignore FREED_MEMORY */ 5027 } 5028 /* sent queue SHOULD be empty */ 5029 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5030 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5031 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5032 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5033 #ifdef INVARIANTS 5034 } else { 5035 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5036 #endif 5037 } 5038 } 5039 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5040 if (chk->data) { 5041 if (so) { 5042 /* Still a socket? */ 5043 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5044 0, chk, SCTP_SO_LOCKED); 5045 } 5046 if (chk->data) { 5047 sctp_m_freem(chk->data); 5048 chk->data = NULL; 5049 } 5050 } 5051 if (chk->holds_key_ref) 5052 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5053 sctp_free_remote_addr(chk->whoTo); 5054 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5055 SCTP_DECR_CHK_COUNT(); 5056 /* sa_ignore FREED_MEMORY */ 5057 } 5058 #ifdef INVARIANTS 5059 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5060 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5061 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5062 } 5063 } 5064 #endif 5065 /* control queue MAY not be empty */ 5066 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5067 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5068 if (chk->data) { 5069 sctp_m_freem(chk->data); 5070 chk->data = NULL; 5071 } 5072 if (chk->holds_key_ref) 5073 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5074 sctp_free_remote_addr(chk->whoTo); 5075 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5076 SCTP_DECR_CHK_COUNT(); 5077 /* sa_ignore FREED_MEMORY */ 5078 } 5079 /* ASCONF queue MAY not be empty */ 5080 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5081 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5082 if (chk->data) { 5083 sctp_m_freem(chk->data); 5084 chk->data = NULL; 5085 } 5086 if (chk->holds_key_ref) 5087 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5088 sctp_free_remote_addr(chk->whoTo); 5089 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5090 SCTP_DECR_CHK_COUNT(); 5091 /* sa_ignore FREED_MEMORY */ 5092 } 5093 if (asoc->mapping_array) { 5094 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5095 asoc->mapping_array = NULL; 5096 } 5097 if (asoc->nr_mapping_array) { 5098 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5099 asoc->nr_mapping_array = NULL; 5100 } 5101 /* the stream outs */ 5102 if (asoc->strmout) { 5103 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5104 asoc->strmout = NULL; 5105 } 5106 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5107 if (asoc->strmin) { 5108 for (i = 0; i < asoc->streamincnt; i++) { 5109 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5110 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5111 } 5112 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5113 asoc->strmin = NULL; 5114 } 5115 asoc->streamincnt = 0; 5116 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5117 #ifdef INVARIANTS 5118 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5119 panic("no net's left alloc'ed, or list points to itself"); 5120 } 5121 #endif 5122 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5123 sctp_free_remote_addr(net); 5124 } 5125 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5126 /* sa_ignore FREED_MEMORY */ 5127 sctp_remove_laddr(laddr); 5128 } 5129 5130 /* pending asconf (address) parameters */ 5131 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5132 /* sa_ignore FREED_MEMORY */ 5133 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5134 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5135 } 5136 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5137 /* sa_ignore FREED_MEMORY */ 5138 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5139 if (aack->data != NULL) { 5140 sctp_m_freem(aack->data); 5141 } 5142 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5143 } 5144 /* clean up auth stuff */ 5145 if (asoc->local_hmacs) 5146 sctp_free_hmaclist(asoc->local_hmacs); 5147 if (asoc->peer_hmacs) 5148 sctp_free_hmaclist(asoc->peer_hmacs); 5149 5150 if (asoc->local_auth_chunks) 5151 sctp_free_chunklist(asoc->local_auth_chunks); 5152 if (asoc->peer_auth_chunks) 5153 sctp_free_chunklist(asoc->peer_auth_chunks); 5154 5155 sctp_free_authinfo(&asoc->authinfo); 5156 5157 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5158 LIST_REMOVE(shared_key, next); 5159 sctp_free_sharedkey(shared_key); 5160 /* sa_ignore FREED_MEMORY */ 5161 } 5162 5163 /* Insert new items here :> */ 5164 5165 /* Get rid of LOCK */ 5166 SCTP_TCB_SEND_UNLOCK(stcb); 5167 SCTP_TCB_UNLOCK(stcb); 5168 SCTP_TCB_LOCK_DESTROY(stcb); 5169 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5170 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5171 SCTP_INP_INFO_WUNLOCK(); 5172 SCTP_INP_RLOCK(inp); 5173 } 5174 #ifdef SCTP_TRACK_FREED_ASOCS 5175 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5176 /* now clean up the tasoc itself */ 5177 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5178 SCTP_DECR_ASOC_COUNT(); 5179 } else { 5180 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5181 } 5182 #else 5183 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5184 SCTP_DECR_ASOC_COUNT(); 5185 #endif 5186 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5187 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5188 /* 5189 * If its NOT the inp_free calling us AND sctp_close 5190 * as been called, we call back... 5191 */ 5192 SCTP_INP_RUNLOCK(inp); 5193 /* 5194 * This will start the kill timer (if we are the 5195 * last one) since we hold an increment yet. But 5196 * this is the only safe way to do this since 5197 * otherwise if the socket closes at the same time 5198 * we are here we might collide in the cleanup. 5199 */ 5200 sctp_inpcb_free(inp, 5201 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5202 SCTP_CALLED_DIRECTLY_NOCMPSET); 5203 SCTP_INP_DECR_REF(inp); 5204 } else { 5205 /* The socket is still open. */ 5206 SCTP_INP_DECR_REF(inp); 5207 SCTP_INP_RUNLOCK(inp); 5208 } 5209 } 5210 /* destroyed the asoc */ 5211 #ifdef SCTP_LOG_CLOSING 5212 sctp_log_closing(inp, NULL, 11); 5213 #endif 5214 return (1); 5215 } 5216 5217 /* 5218 * determine if a destination is "reachable" based upon the addresses bound 5219 * to the current endpoint (e.g. only v4 or v6 currently bound) 5220 */ 5221 /* 5222 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5223 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5224 * types bound as its endpoint 5225 */ 5226 int 5227 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5228 { 5229 struct sctp_inpcb *inp; 5230 int answer; 5231 5232 /* 5233 * No locks here, the TCB, in all cases is already locked and an 5234 * assoc is up. There is either a INP lock by the caller applied (in 5235 * asconf case when deleting an address) or NOT in the HB case, 5236 * however if HB then the INP increment is up and the INP will not 5237 * be removed (on top of the fact that we have a TCB lock). So we 5238 * only want to read the sctp_flags, which is either bound-all or 5239 * not.. no protection needed since once an assoc is up you can't be 5240 * changing your binding. 5241 */ 5242 inp = stcb->sctp_ep; 5243 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5244 /* if bound all, destination is not restricted */ 5245 /* 5246 * RRS: Question during lock work: Is this correct? If you 5247 * are bound-all you still might need to obey the V4--V6 5248 * flags??? IMO this bound-all stuff needs to be removed! 5249 */ 5250 return (1); 5251 } 5252 /* NOTE: all "scope" checks are done when local addresses are added */ 5253 switch (destaddr->sa_family) { 5254 #ifdef INET6 5255 case AF_INET6: 5256 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5257 break; 5258 #endif 5259 #ifdef INET 5260 case AF_INET: 5261 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5262 break; 5263 #endif 5264 default: 5265 /* invalid family, so it's unreachable */ 5266 answer = 0; 5267 break; 5268 } 5269 return (answer); 5270 } 5271 5272 /* 5273 * update the inp_vflags on an endpoint 5274 */ 5275 static void 5276 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5277 { 5278 struct sctp_laddr *laddr; 5279 5280 /* first clear the flag */ 5281 inp->ip_inp.inp.inp_vflag = 0; 5282 /* set the flag based on addresses on the ep list */ 5283 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5284 if (laddr->ifa == NULL) { 5285 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5286 __func__); 5287 continue; 5288 } 5289 5290 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5291 continue; 5292 } 5293 switch (laddr->ifa->address.sa.sa_family) { 5294 #ifdef INET6 5295 case AF_INET6: 5296 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5297 break; 5298 #endif 5299 #ifdef INET 5300 case AF_INET: 5301 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5302 break; 5303 #endif 5304 default: 5305 break; 5306 } 5307 } 5308 } 5309 5310 /* 5311 * Add the address to the endpoint local address list There is nothing to be 5312 * done if we are bound to all addresses 5313 */ 5314 void 5315 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5316 { 5317 struct sctp_laddr *laddr; 5318 struct sctp_tcb *stcb; 5319 int fnd, error = 0; 5320 5321 fnd = 0; 5322 5323 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5324 /* You are already bound to all. You have it already */ 5325 return; 5326 } 5327 #ifdef INET6 5328 if (ifa->address.sa.sa_family == AF_INET6) { 5329 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5330 /* Can't bind a non-useable addr. */ 5331 return; 5332 } 5333 } 5334 #endif 5335 /* first, is it already present? */ 5336 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5337 if (laddr->ifa == ifa) { 5338 fnd = 1; 5339 break; 5340 } 5341 } 5342 5343 if (fnd == 0) { 5344 /* Not in the ep list */ 5345 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5346 if (error != 0) 5347 return; 5348 inp->laddr_count++; 5349 /* update inp_vflag flags */ 5350 switch (ifa->address.sa.sa_family) { 5351 #ifdef INET6 5352 case AF_INET6: 5353 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5354 break; 5355 #endif 5356 #ifdef INET 5357 case AF_INET: 5358 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5359 break; 5360 #endif 5361 default: 5362 break; 5363 } 5364 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5365 sctp_add_local_addr_restricted(stcb, ifa); 5366 } 5367 } 5368 return; 5369 } 5370 5371 /* 5372 * select a new (hopefully reachable) destination net (should only be used 5373 * when we deleted an ep addr that is the only usable source address to reach 5374 * the destination net) 5375 */ 5376 static void 5377 sctp_select_primary_destination(struct sctp_tcb *stcb) 5378 { 5379 struct sctp_nets *net; 5380 5381 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5382 /* for now, we'll just pick the first reachable one we find */ 5383 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5384 continue; 5385 if (sctp_destination_is_reachable(stcb, 5386 (struct sockaddr *)&net->ro._l_addr)) { 5387 /* found a reachable destination */ 5388 stcb->asoc.primary_destination = net; 5389 } 5390 } 5391 /* I can't there from here! ...we're gonna die shortly... */ 5392 } 5393 5394 /* 5395 * Delete the address from the endpoint local address list. There is nothing 5396 * to be done if we are bound to all addresses 5397 */ 5398 void 5399 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5400 { 5401 struct sctp_laddr *laddr; 5402 int fnd; 5403 5404 fnd = 0; 5405 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5406 /* You are already bound to all. You have it already */ 5407 return; 5408 } 5409 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5410 if (laddr->ifa == ifa) { 5411 fnd = 1; 5412 break; 5413 } 5414 } 5415 if (fnd && (inp->laddr_count < 2)) { 5416 /* can't delete unless there are at LEAST 2 addresses */ 5417 return; 5418 } 5419 if (fnd) { 5420 /* 5421 * clean up any use of this address go through our 5422 * associations and clear any last_used_address that match 5423 * this one for each assoc, see if a new primary_destination 5424 * is needed 5425 */ 5426 struct sctp_tcb *stcb; 5427 5428 /* clean up "next_addr_touse" */ 5429 if (inp->next_addr_touse == laddr) 5430 /* delete this address */ 5431 inp->next_addr_touse = NULL; 5432 5433 /* clean up "last_used_address" */ 5434 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5435 struct sctp_nets *net; 5436 5437 SCTP_TCB_LOCK(stcb); 5438 if (stcb->asoc.last_used_address == laddr) 5439 /* delete this address */ 5440 stcb->asoc.last_used_address = NULL; 5441 /* 5442 * Now spin through all the nets and purge any ref 5443 * to laddr 5444 */ 5445 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5446 if (net->ro._s_addr == laddr->ifa) { 5447 /* Yep, purge src address selected */ 5448 RO_NHFREE(&net->ro); 5449 sctp_free_ifa(net->ro._s_addr); 5450 net->ro._s_addr = NULL; 5451 net->src_addr_selected = 0; 5452 } 5453 } 5454 SCTP_TCB_UNLOCK(stcb); 5455 } /* for each tcb */ 5456 /* remove it from the ep list */ 5457 sctp_remove_laddr(laddr); 5458 inp->laddr_count--; 5459 /* update inp_vflag flags */ 5460 sctp_update_ep_vflag(inp); 5461 } 5462 return; 5463 } 5464 5465 /* 5466 * Add the address to the TCB local address restricted list. 5467 * This is a "pending" address list (eg. addresses waiting for an 5468 * ASCONF-ACK response) and cannot be used as a valid source address. 5469 */ 5470 void 5471 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5472 { 5473 struct sctp_laddr *laddr; 5474 struct sctpladdr *list; 5475 5476 /* 5477 * Assumes TCB is locked.. and possibly the INP. May need to 5478 * confirm/fix that if we need it and is not the case. 5479 */ 5480 list = &stcb->asoc.sctp_restricted_addrs; 5481 5482 #ifdef INET6 5483 if (ifa->address.sa.sa_family == AF_INET6) { 5484 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5485 /* Can't bind a non-existent addr. */ 5486 return; 5487 } 5488 } 5489 #endif 5490 /* does the address already exist? */ 5491 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5492 if (laddr->ifa == ifa) { 5493 return; 5494 } 5495 } 5496 5497 /* add to the list */ 5498 (void)sctp_insert_laddr(list, ifa, 0); 5499 return; 5500 } 5501 5502 /* 5503 * Remove a local address from the TCB local address restricted list 5504 */ 5505 void 5506 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5507 { 5508 struct sctp_inpcb *inp; 5509 struct sctp_laddr *laddr; 5510 5511 /* 5512 * This is called by asconf work. It is assumed that a) The TCB is 5513 * locked and b) The INP is locked. This is true in as much as I can 5514 * trace through the entry asconf code where I did these locks. 5515 * Again, the ASCONF code is a bit different in that it does lock 5516 * the INP during its work often times. This must be since we don't 5517 * want other proc's looking up things while what they are looking 5518 * up is changing :-D 5519 */ 5520 5521 inp = stcb->sctp_ep; 5522 /* if subset bound and don't allow ASCONF's, can't delete last */ 5523 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5524 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5525 if (stcb->sctp_ep->laddr_count < 2) { 5526 /* can't delete last address */ 5527 return; 5528 } 5529 } 5530 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5531 /* remove the address if it exists */ 5532 if (laddr->ifa == NULL) 5533 continue; 5534 if (laddr->ifa == ifa) { 5535 sctp_remove_laddr(laddr); 5536 return; 5537 } 5538 } 5539 5540 /* address not found! */ 5541 return; 5542 } 5543 5544 /* sysctl */ 5545 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5546 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5547 5548 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5549 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5550 int *sctp_cpuarry = NULL; 5551 5552 void 5553 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5554 { 5555 /* Queue a packet to a processor for the specified core */ 5556 struct sctp_mcore_queue *qent; 5557 struct sctp_mcore_ctrl *wkq; 5558 int need_wake = 0; 5559 5560 if (sctp_mcore_workers == NULL) { 5561 /* Something went way bad during setup */ 5562 sctp_input_with_port(m, off, 0); 5563 return; 5564 } 5565 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5566 (sizeof(struct sctp_mcore_queue)), 5567 SCTP_M_MCORE); 5568 if (qent == NULL) { 5569 /* This is trouble */ 5570 sctp_input_with_port(m, off, 0); 5571 return; 5572 } 5573 qent->vn = curvnet; 5574 qent->m = m; 5575 qent->off = off; 5576 qent->v6 = 0; 5577 wkq = &sctp_mcore_workers[cpu_to_use]; 5578 SCTP_MCORE_QLOCK(wkq); 5579 5580 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5581 if (wkq->running == 0) { 5582 need_wake = 1; 5583 } 5584 SCTP_MCORE_QUNLOCK(wkq); 5585 if (need_wake) { 5586 wakeup(&wkq->running); 5587 } 5588 } 5589 5590 static void 5591 sctp_mcore_thread(void *arg) 5592 { 5593 5594 struct sctp_mcore_ctrl *wkq; 5595 struct sctp_mcore_queue *qent; 5596 5597 wkq = (struct sctp_mcore_ctrl *)arg; 5598 struct mbuf *m; 5599 int off, v6; 5600 5601 /* Wait for first tickle */ 5602 SCTP_MCORE_LOCK(wkq); 5603 wkq->running = 0; 5604 msleep(&wkq->running, 5605 &wkq->core_mtx, 5606 0, "wait for pkt", 0); 5607 SCTP_MCORE_UNLOCK(wkq); 5608 5609 /* Bind to our cpu */ 5610 thread_lock(curthread); 5611 sched_bind(curthread, wkq->cpuid); 5612 thread_unlock(curthread); 5613 5614 /* Now lets start working */ 5615 SCTP_MCORE_LOCK(wkq); 5616 /* Now grab lock and go */ 5617 for (;;) { 5618 SCTP_MCORE_QLOCK(wkq); 5619 skip_sleep: 5620 wkq->running = 1; 5621 qent = TAILQ_FIRST(&wkq->que); 5622 if (qent) { 5623 TAILQ_REMOVE(&wkq->que, qent, next); 5624 SCTP_MCORE_QUNLOCK(wkq); 5625 CURVNET_SET(qent->vn); 5626 m = qent->m; 5627 off = qent->off; 5628 v6 = qent->v6; 5629 SCTP_FREE(qent, SCTP_M_MCORE); 5630 if (v6 == 0) { 5631 sctp_input_with_port(m, off, 0); 5632 } else { 5633 SCTP_PRINTF("V6 not yet supported\n"); 5634 sctp_m_freem(m); 5635 } 5636 CURVNET_RESTORE(); 5637 SCTP_MCORE_QLOCK(wkq); 5638 } 5639 wkq->running = 0; 5640 if (!TAILQ_EMPTY(&wkq->que)) { 5641 goto skip_sleep; 5642 } 5643 SCTP_MCORE_QUNLOCK(wkq); 5644 msleep(&wkq->running, 5645 &wkq->core_mtx, 5646 0, "wait for pkt", 0); 5647 } 5648 } 5649 5650 static void 5651 sctp_startup_mcore_threads(void) 5652 { 5653 int i, cpu; 5654 5655 if (mp_ncpus == 1) 5656 return; 5657 5658 if (sctp_mcore_workers != NULL) { 5659 /* 5660 * Already been here in some previous vnet? 5661 */ 5662 return; 5663 } 5664 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5665 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5666 SCTP_M_MCORE); 5667 if (sctp_mcore_workers == NULL) { 5668 /* TSNH I hope */ 5669 return; 5670 } 5671 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5672 sizeof(struct sctp_mcore_ctrl))); 5673 /* Init the structures */ 5674 for (i = 0; i <= mp_maxid; i++) { 5675 TAILQ_INIT(&sctp_mcore_workers[i].que); 5676 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5677 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5678 sctp_mcore_workers[i].cpuid = i; 5679 } 5680 if (sctp_cpuarry == NULL) { 5681 SCTP_MALLOC(sctp_cpuarry, int *, 5682 (mp_ncpus * sizeof(int)), 5683 SCTP_M_MCORE); 5684 i = 0; 5685 CPU_FOREACH(cpu) { 5686 sctp_cpuarry[i] = cpu; 5687 i++; 5688 } 5689 } 5690 /* Now start them all */ 5691 CPU_FOREACH(cpu) { 5692 (void)kproc_create(sctp_mcore_thread, 5693 (void *)&sctp_mcore_workers[cpu], 5694 &sctp_mcore_workers[cpu].thread_proc, 5695 0, 5696 SCTP_KTHREAD_PAGES, 5697 SCTP_MCORE_NAME); 5698 } 5699 } 5700 #endif 5701 5702 void 5703 sctp_pcb_init(void) 5704 { 5705 /* 5706 * SCTP initialization for the PCB structures should be called by 5707 * the sctp_init() function. 5708 */ 5709 int i; 5710 struct timeval tv; 5711 5712 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5713 /* error I was called twice */ 5714 return; 5715 } 5716 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5717 5718 #if defined(SCTP_LOCAL_TRACE_BUF) 5719 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5720 #endif 5721 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5722 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5723 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5724 SCTP_M_MCORE); 5725 #endif 5726 (void)SCTP_GETTIME_TIMEVAL(&tv); 5727 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5728 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5729 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5730 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5731 #else 5732 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5733 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5734 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5735 #endif 5736 /* init the empty list of (All) Endpoints */ 5737 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5738 5739 /* init the hash table of endpoints */ 5740 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5741 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5742 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5743 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5744 &SCTP_BASE_INFO(hashasocmark)); 5745 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5746 &SCTP_BASE_INFO(hashmark)); 5747 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5748 &SCTP_BASE_INFO(hashtcpmark)); 5749 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5750 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5751 &SCTP_BASE_INFO(hashvrfmark)); 5752 5753 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5754 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5755 /* init the zones */ 5756 /* 5757 * FIX ME: Should check for NULL returns, but if it does fail we are 5758 * doomed to panic anyways... add later maybe. 5759 */ 5760 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5761 sizeof(struct sctp_inpcb), maxsockets); 5762 5763 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5764 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5765 5766 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5767 sizeof(struct sctp_laddr), 5768 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5769 5770 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5771 sizeof(struct sctp_nets), 5772 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5773 5774 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5775 sizeof(struct sctp_tmit_chunk), 5776 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5777 5778 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5779 sizeof(struct sctp_queued_to_read), 5780 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5781 5782 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5783 sizeof(struct sctp_stream_queue_pending), 5784 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5785 5786 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5787 sizeof(struct sctp_asconf), 5788 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5789 5790 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5791 sizeof(struct sctp_asconf_ack), 5792 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5793 5794 /* Master Lock INIT for info structure */ 5795 SCTP_INP_INFO_LOCK_INIT(); 5796 SCTP_STATLOG_INIT_LOCK(); 5797 5798 SCTP_IPI_COUNT_INIT(); 5799 SCTP_IPI_ADDR_INIT(); 5800 #ifdef SCTP_PACKET_LOGGING 5801 SCTP_IP_PKTLOG_INIT(); 5802 #endif 5803 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5804 5805 SCTP_WQ_ADDR_INIT(); 5806 /* not sure if we need all the counts */ 5807 SCTP_BASE_INFO(ipi_count_ep) = 0; 5808 /* assoc/tcb zone info */ 5809 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5810 /* local addrlist zone info */ 5811 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5812 /* remote addrlist zone info */ 5813 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5814 /* chunk info */ 5815 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5816 5817 /* socket queue zone info */ 5818 SCTP_BASE_INFO(ipi_count_readq) = 0; 5819 5820 /* stream out queue cont */ 5821 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5822 5823 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5824 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5825 5826 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5827 5828 /* Init the TIMEWAIT list */ 5829 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5830 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5831 } 5832 sctp_startup_iterator(); 5833 5834 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5835 sctp_startup_mcore_threads(); 5836 #endif 5837 5838 /* 5839 * INIT the default VRF which for BSD is the only one, other O/S's 5840 * may have more. But initially they must start with one and then 5841 * add the VRF's as addresses are added. 5842 */ 5843 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5844 } 5845 5846 /* 5847 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5848 */ 5849 void 5850 sctp_pcb_finish(void) 5851 { 5852 struct sctp_vrflist *vrf_bucket; 5853 struct sctp_vrf *vrf, *nvrf; 5854 struct sctp_ifn *ifn, *nifn; 5855 struct sctp_ifa *ifa, *nifa; 5856 struct sctpvtaghead *chain; 5857 struct sctp_tagblock *twait_block, *prev_twait_block; 5858 struct sctp_laddr *wi, *nwi; 5859 int i; 5860 struct sctp_iterator *it, *nit; 5861 5862 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5863 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5864 return; 5865 } 5866 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5867 /* 5868 * In FreeBSD the iterator thread never exits but we do clean up. 5869 * The only way FreeBSD reaches here is if we have VRF's but we 5870 * still add the ifdef to make it compile on old versions. 5871 */ 5872 retry: 5873 SCTP_IPI_ITERATOR_WQ_LOCK(); 5874 /* 5875 * sctp_iterator_worker() might be working on an it entry without 5876 * holding the lock. We won't find it on the list either and 5877 * continue and free/destroy it. While holding the lock, spin, to 5878 * avoid the race condition as sctp_iterator_worker() will have to 5879 * wait to re-acquire the lock. 5880 */ 5881 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5882 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5883 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5884 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5885 DELAY(10); 5886 goto retry; 5887 } 5888 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5889 if (it->vn != curvnet) { 5890 continue; 5891 } 5892 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5893 if (it->function_atend != NULL) { 5894 (*it->function_atend) (it->pointer, it->val); 5895 } 5896 SCTP_FREE(it, SCTP_M_ITER); 5897 } 5898 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5899 SCTP_ITERATOR_LOCK(); 5900 if ((sctp_it_ctl.cur_it) && 5901 (sctp_it_ctl.cur_it->vn == curvnet)) { 5902 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5903 } 5904 SCTP_ITERATOR_UNLOCK(); 5905 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5906 SCTP_WQ_ADDR_LOCK(); 5907 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5908 LIST_REMOVE(wi, sctp_nxt_addr); 5909 SCTP_DECR_LADDR_COUNT(); 5910 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5911 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5912 } 5913 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5914 } 5915 SCTP_WQ_ADDR_UNLOCK(); 5916 5917 /* 5918 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5919 * destroyed first). 5920 */ 5921 SCTP_IPI_ADDR_WLOCK(); 5922 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5923 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5924 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5925 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5926 /* free the ifa */ 5927 LIST_REMOVE(ifa, next_bucket); 5928 LIST_REMOVE(ifa, next_ifa); 5929 SCTP_FREE(ifa, SCTP_M_IFA); 5930 } 5931 /* free the ifn */ 5932 LIST_REMOVE(ifn, next_bucket); 5933 LIST_REMOVE(ifn, next_ifn); 5934 SCTP_FREE(ifn, SCTP_M_IFN); 5935 } 5936 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5937 /* free the vrf */ 5938 LIST_REMOVE(vrf, next_vrf); 5939 SCTP_FREE(vrf, SCTP_M_VRF); 5940 } 5941 SCTP_IPI_ADDR_WUNLOCK(); 5942 /* free the vrf hashes */ 5943 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5944 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5945 5946 /* 5947 * free the TIMEWAIT list elements malloc'd in the function 5948 * sctp_add_vtag_to_timewait()... 5949 */ 5950 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5951 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5952 if (!LIST_EMPTY(chain)) { 5953 prev_twait_block = NULL; 5954 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5955 if (prev_twait_block) { 5956 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5957 } 5958 prev_twait_block = twait_block; 5959 } 5960 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5961 } 5962 } 5963 5964 /* free the locks and mutexes */ 5965 #ifdef SCTP_PACKET_LOGGING 5966 SCTP_IP_PKTLOG_DESTROY(); 5967 #endif 5968 SCTP_IPI_ADDR_DESTROY(); 5969 SCTP_STATLOG_DESTROY(); 5970 SCTP_INP_INFO_LOCK_DESTROY(); 5971 5972 SCTP_WQ_ADDR_DESTROY(); 5973 5974 /* Get rid of other stuff too. */ 5975 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5976 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5977 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5978 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5979 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5980 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5981 5982 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5983 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5984 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5985 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5986 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5987 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5988 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5989 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5990 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5991 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5992 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5993 #endif 5994 } 5995 5996 int 5997 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5998 int offset, int limit, 5999 struct sockaddr *src, struct sockaddr *dst, 6000 struct sockaddr *altsa, uint16_t port) 6001 { 6002 /* 6003 * grub through the INIT pulling addresses and loading them to the 6004 * nets structure in the asoc. The from address in the mbuf should 6005 * also be loaded (if it is not already). This routine can be called 6006 * with either INIT or INIT-ACK's as long as the m points to the IP 6007 * packet and the offset points to the beginning of the parameters. 6008 */ 6009 struct sctp_inpcb *inp; 6010 struct sctp_nets *net, *nnet, *net_tmp; 6011 struct sctp_paramhdr *phdr, param_buf; 6012 struct sctp_tcb *stcb_tmp; 6013 uint16_t ptype, plen; 6014 struct sockaddr *sa; 6015 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6016 struct sctp_auth_random *p_random = NULL; 6017 uint16_t random_len = 0; 6018 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6019 struct sctp_auth_hmac_algo *hmacs = NULL; 6020 uint16_t hmacs_len = 0; 6021 uint8_t saw_asconf = 0; 6022 uint8_t saw_asconf_ack = 0; 6023 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6024 struct sctp_auth_chunk_list *chunks = NULL; 6025 uint16_t num_chunks = 0; 6026 sctp_key_t *new_key; 6027 uint32_t keylen; 6028 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6029 uint8_t peer_supports_ecn; 6030 uint8_t peer_supports_prsctp; 6031 uint8_t peer_supports_auth; 6032 uint8_t peer_supports_asconf; 6033 uint8_t peer_supports_asconf_ack; 6034 uint8_t peer_supports_reconfig; 6035 uint8_t peer_supports_nrsack; 6036 uint8_t peer_supports_pktdrop; 6037 uint8_t peer_supports_idata; 6038 #ifdef INET 6039 struct sockaddr_in sin; 6040 #endif 6041 #ifdef INET6 6042 struct sockaddr_in6 sin6; 6043 #endif 6044 6045 /* First get the destination address setup too. */ 6046 #ifdef INET 6047 memset(&sin, 0, sizeof(sin)); 6048 sin.sin_family = AF_INET; 6049 sin.sin_len = sizeof(sin); 6050 sin.sin_port = stcb->rport; 6051 #endif 6052 #ifdef INET6 6053 memset(&sin6, 0, sizeof(sin6)); 6054 sin6.sin6_family = AF_INET6; 6055 sin6.sin6_len = sizeof(struct sockaddr_in6); 6056 sin6.sin6_port = stcb->rport; 6057 #endif 6058 if (altsa) { 6059 sa = altsa; 6060 } else { 6061 sa = src; 6062 } 6063 peer_supports_idata = 0; 6064 peer_supports_ecn = 0; 6065 peer_supports_prsctp = 0; 6066 peer_supports_auth = 0; 6067 peer_supports_asconf = 0; 6068 peer_supports_asconf_ack = 0; 6069 peer_supports_reconfig = 0; 6070 peer_supports_nrsack = 0; 6071 peer_supports_pktdrop = 0; 6072 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6073 /* mark all addresses that we have currently on the list */ 6074 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6075 } 6076 /* does the source address already exist? if so skip it */ 6077 inp = stcb->sctp_ep; 6078 atomic_add_int(&stcb->asoc.refcnt, 1); 6079 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6080 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6081 6082 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6083 /* we must add the source address */ 6084 /* no scope set here since we have a tcb already. */ 6085 switch (sa->sa_family) { 6086 #ifdef INET 6087 case AF_INET: 6088 if (stcb->asoc.scope.ipv4_addr_legal) { 6089 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6090 return (-1); 6091 } 6092 } 6093 break; 6094 #endif 6095 #ifdef INET6 6096 case AF_INET6: 6097 if (stcb->asoc.scope.ipv6_addr_legal) { 6098 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6099 return (-2); 6100 } 6101 } 6102 break; 6103 #endif 6104 default: 6105 break; 6106 } 6107 } else { 6108 if (net_tmp != NULL && stcb_tmp == stcb) { 6109 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6110 } else if (stcb_tmp != stcb) { 6111 /* It belongs to another association? */ 6112 if (stcb_tmp) 6113 SCTP_TCB_UNLOCK(stcb_tmp); 6114 return (-3); 6115 } 6116 } 6117 if (stcb->asoc.state == 0) { 6118 /* the assoc was freed? */ 6119 return (-4); 6120 } 6121 /* now we must go through each of the params. */ 6122 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6123 while (phdr) { 6124 ptype = ntohs(phdr->param_type); 6125 plen = ntohs(phdr->param_length); 6126 /* 6127 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6128 * (uint32_t)ptype, (int)plen); 6129 */ 6130 if (offset + plen > limit) { 6131 break; 6132 } 6133 if (plen < sizeof(struct sctp_paramhdr)) { 6134 break; 6135 } 6136 #ifdef INET 6137 if (ptype == SCTP_IPV4_ADDRESS) { 6138 if (stcb->asoc.scope.ipv4_addr_legal) { 6139 struct sctp_ipv4addr_param *p4, p4_buf; 6140 6141 /* ok get the v4 address and check/add */ 6142 phdr = sctp_get_next_param(m, offset, 6143 (struct sctp_paramhdr *)&p4_buf, 6144 sizeof(p4_buf)); 6145 if (plen != sizeof(struct sctp_ipv4addr_param) || 6146 phdr == NULL) { 6147 return (-5); 6148 } 6149 p4 = (struct sctp_ipv4addr_param *)phdr; 6150 sin.sin_addr.s_addr = p4->addr; 6151 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6152 /* Skip multi-cast addresses */ 6153 goto next_param; 6154 } 6155 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6156 (sin.sin_addr.s_addr == INADDR_ANY)) { 6157 goto next_param; 6158 } 6159 sa = (struct sockaddr *)&sin; 6160 inp = stcb->sctp_ep; 6161 atomic_add_int(&stcb->asoc.refcnt, 1); 6162 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6163 dst, stcb); 6164 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6165 6166 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6167 inp == NULL) { 6168 /* we must add the source address */ 6169 /* 6170 * no scope set since we have a tcb 6171 * already 6172 */ 6173 6174 /* 6175 * we must validate the state again 6176 * here 6177 */ 6178 add_it_now: 6179 if (stcb->asoc.state == 0) { 6180 /* the assoc was freed? */ 6181 return (-7); 6182 } 6183 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6184 return (-8); 6185 } 6186 } else if (stcb_tmp == stcb) { 6187 if (stcb->asoc.state == 0) { 6188 /* the assoc was freed? */ 6189 return (-10); 6190 } 6191 if (net != NULL) { 6192 /* clear flag */ 6193 net->dest_state &= 6194 ~SCTP_ADDR_NOT_IN_ASSOC; 6195 } 6196 } else { 6197 /* 6198 * strange, address is in another 6199 * assoc? straighten out locks. 6200 */ 6201 if (stcb_tmp) { 6202 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6203 struct mbuf *op_err; 6204 char msg[SCTP_DIAG_INFO_LEN]; 6205 6206 /* 6207 * in setup state we 6208 * abort this guy 6209 */ 6210 SCTP_SNPRINTF(msg, sizeof(msg), 6211 "%s:%d at %s", __FILE__, __LINE__, __func__); 6212 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6213 msg); 6214 sctp_abort_an_association(stcb_tmp->sctp_ep, 6215 stcb_tmp, op_err, false, 6216 SCTP_SO_NOT_LOCKED); 6217 goto add_it_now; 6218 } 6219 SCTP_TCB_UNLOCK(stcb_tmp); 6220 } 6221 6222 if (stcb->asoc.state == 0) { 6223 /* the assoc was freed? */ 6224 return (-12); 6225 } 6226 return (-13); 6227 } 6228 } 6229 } else 6230 #endif 6231 #ifdef INET6 6232 if (ptype == SCTP_IPV6_ADDRESS) { 6233 if (stcb->asoc.scope.ipv6_addr_legal) { 6234 /* ok get the v6 address and check/add */ 6235 struct sctp_ipv6addr_param *p6, p6_buf; 6236 6237 phdr = sctp_get_next_param(m, offset, 6238 (struct sctp_paramhdr *)&p6_buf, 6239 sizeof(p6_buf)); 6240 if (plen != sizeof(struct sctp_ipv6addr_param) || 6241 phdr == NULL) { 6242 return (-14); 6243 } 6244 p6 = (struct sctp_ipv6addr_param *)phdr; 6245 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6246 sizeof(p6->addr)); 6247 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6248 /* Skip multi-cast addresses */ 6249 goto next_param; 6250 } 6251 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6252 /* 6253 * Link local make no sense without 6254 * scope 6255 */ 6256 goto next_param; 6257 } 6258 sa = (struct sockaddr *)&sin6; 6259 inp = stcb->sctp_ep; 6260 atomic_add_int(&stcb->asoc.refcnt, 1); 6261 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6262 dst, stcb); 6263 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6264 if (stcb_tmp == NULL && 6265 (inp == stcb->sctp_ep || inp == NULL)) { 6266 /* 6267 * we must validate the state again 6268 * here 6269 */ 6270 add_it_now6: 6271 if (stcb->asoc.state == 0) { 6272 /* the assoc was freed? */ 6273 return (-16); 6274 } 6275 /* 6276 * we must add the address, no scope 6277 * set 6278 */ 6279 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6280 return (-17); 6281 } 6282 } else if (stcb_tmp == stcb) { 6283 /* 6284 * we must validate the state again 6285 * here 6286 */ 6287 if (stcb->asoc.state == 0) { 6288 /* the assoc was freed? */ 6289 return (-19); 6290 } 6291 if (net != NULL) { 6292 /* clear flag */ 6293 net->dest_state &= 6294 ~SCTP_ADDR_NOT_IN_ASSOC; 6295 } 6296 } else { 6297 /* 6298 * strange, address is in another 6299 * assoc? straighten out locks. 6300 */ 6301 if (stcb_tmp) { 6302 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6303 struct mbuf *op_err; 6304 char msg[SCTP_DIAG_INFO_LEN]; 6305 6306 /* 6307 * in setup state we 6308 * abort this guy 6309 */ 6310 SCTP_SNPRINTF(msg, sizeof(msg), 6311 "%s:%d at %s", __FILE__, __LINE__, __func__); 6312 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6313 msg); 6314 sctp_abort_an_association(stcb_tmp->sctp_ep, 6315 stcb_tmp, op_err, false, 6316 SCTP_SO_NOT_LOCKED); 6317 goto add_it_now6; 6318 } 6319 SCTP_TCB_UNLOCK(stcb_tmp); 6320 } 6321 if (stcb->asoc.state == 0) { 6322 /* the assoc was freed? */ 6323 return (-21); 6324 } 6325 return (-22); 6326 } 6327 } 6328 } else 6329 #endif 6330 if (ptype == SCTP_ECN_CAPABLE) { 6331 peer_supports_ecn = 1; 6332 } else if (ptype == SCTP_ULP_ADAPTATION) { 6333 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6334 struct sctp_adaptation_layer_indication ai, 6335 *aip; 6336 6337 phdr = sctp_get_next_param(m, offset, 6338 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6339 aip = (struct sctp_adaptation_layer_indication *)phdr; 6340 if (aip) { 6341 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6342 stcb->asoc.adaptation_needed = 1; 6343 } 6344 } 6345 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6346 struct sctp_asconf_addr_param lstore, *fee; 6347 int lptype; 6348 struct sockaddr *lsa = NULL; 6349 #ifdef INET 6350 struct sctp_asconf_addrv4_param *fii; 6351 #endif 6352 6353 if (stcb->asoc.asconf_supported == 0) { 6354 return (-100); 6355 } 6356 if (plen > sizeof(lstore)) { 6357 return (-23); 6358 } 6359 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6360 return (-101); 6361 } 6362 phdr = sctp_get_next_param(m, offset, 6363 (struct sctp_paramhdr *)&lstore, 6364 plen); 6365 if (phdr == NULL) { 6366 return (-24); 6367 } 6368 fee = (struct sctp_asconf_addr_param *)phdr; 6369 lptype = ntohs(fee->addrp.ph.param_type); 6370 switch (lptype) { 6371 #ifdef INET 6372 case SCTP_IPV4_ADDRESS: 6373 if (plen != 6374 sizeof(struct sctp_asconf_addrv4_param)) { 6375 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6376 (int)sizeof(struct sctp_asconf_addrv4_param), 6377 plen); 6378 } else { 6379 fii = (struct sctp_asconf_addrv4_param *)fee; 6380 sin.sin_addr.s_addr = fii->addrp.addr; 6381 lsa = (struct sockaddr *)&sin; 6382 } 6383 break; 6384 #endif 6385 #ifdef INET6 6386 case SCTP_IPV6_ADDRESS: 6387 if (plen != 6388 sizeof(struct sctp_asconf_addr_param)) { 6389 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6390 (int)sizeof(struct sctp_asconf_addr_param), 6391 plen); 6392 } else { 6393 memcpy(sin6.sin6_addr.s6_addr, 6394 fee->addrp.addr, 6395 sizeof(fee->addrp.addr)); 6396 lsa = (struct sockaddr *)&sin6; 6397 } 6398 break; 6399 #endif 6400 default: 6401 break; 6402 } 6403 if (lsa) { 6404 (void)sctp_set_primary_addr(stcb, sa, NULL); 6405 } 6406 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6407 stcb->asoc.peer_supports_nat = 1; 6408 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6409 /* Peer supports pr-sctp */ 6410 peer_supports_prsctp = 1; 6411 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6412 /* A supported extension chunk */ 6413 struct sctp_supported_chunk_types_param *pr_supported; 6414 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6415 int num_ent, i; 6416 6417 if (plen > sizeof(local_store)) { 6418 return (-35); 6419 } 6420 phdr = sctp_get_next_param(m, offset, 6421 (struct sctp_paramhdr *)&local_store, plen); 6422 if (phdr == NULL) { 6423 return (-25); 6424 } 6425 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6426 num_ent = plen - sizeof(struct sctp_paramhdr); 6427 for (i = 0; i < num_ent; i++) { 6428 switch (pr_supported->chunk_types[i]) { 6429 case SCTP_ASCONF: 6430 peer_supports_asconf = 1; 6431 break; 6432 case SCTP_ASCONF_ACK: 6433 peer_supports_asconf_ack = 1; 6434 break; 6435 case SCTP_FORWARD_CUM_TSN: 6436 peer_supports_prsctp = 1; 6437 break; 6438 case SCTP_PACKET_DROPPED: 6439 peer_supports_pktdrop = 1; 6440 break; 6441 case SCTP_NR_SELECTIVE_ACK: 6442 peer_supports_nrsack = 1; 6443 break; 6444 case SCTP_STREAM_RESET: 6445 peer_supports_reconfig = 1; 6446 break; 6447 case SCTP_AUTHENTICATION: 6448 peer_supports_auth = 1; 6449 break; 6450 case SCTP_IDATA: 6451 peer_supports_idata = 1; 6452 break; 6453 default: 6454 /* one I have not learned yet */ 6455 break; 6456 } 6457 } 6458 } else if (ptype == SCTP_RANDOM) { 6459 if (plen > sizeof(random_store)) 6460 break; 6461 if (got_random) { 6462 /* already processed a RANDOM */ 6463 goto next_param; 6464 } 6465 phdr = sctp_get_next_param(m, offset, 6466 (struct sctp_paramhdr *)random_store, 6467 plen); 6468 if (phdr == NULL) 6469 return (-26); 6470 p_random = (struct sctp_auth_random *)phdr; 6471 random_len = plen - sizeof(*p_random); 6472 /* enforce the random length */ 6473 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6474 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6475 return (-27); 6476 } 6477 got_random = 1; 6478 } else if (ptype == SCTP_HMAC_LIST) { 6479 uint16_t num_hmacs; 6480 uint16_t i; 6481 6482 if (plen > sizeof(hmacs_store)) 6483 break; 6484 if (got_hmacs) { 6485 /* already processed a HMAC list */ 6486 goto next_param; 6487 } 6488 phdr = sctp_get_next_param(m, offset, 6489 (struct sctp_paramhdr *)hmacs_store, 6490 plen); 6491 if (phdr == NULL) 6492 return (-28); 6493 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6494 hmacs_len = plen - sizeof(*hmacs); 6495 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6496 /* validate the hmac list */ 6497 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6498 return (-29); 6499 } 6500 if (stcb->asoc.peer_hmacs != NULL) 6501 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6502 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6503 if (stcb->asoc.peer_hmacs != NULL) { 6504 for (i = 0; i < num_hmacs; i++) { 6505 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6506 ntohs(hmacs->hmac_ids[i])); 6507 } 6508 } 6509 got_hmacs = 1; 6510 } else if (ptype == SCTP_CHUNK_LIST) { 6511 int i; 6512 6513 if (plen > sizeof(chunks_store)) 6514 break; 6515 if (got_chklist) { 6516 /* already processed a Chunks list */ 6517 goto next_param; 6518 } 6519 phdr = sctp_get_next_param(m, offset, 6520 (struct sctp_paramhdr *)chunks_store, 6521 plen); 6522 if (phdr == NULL) 6523 return (-30); 6524 chunks = (struct sctp_auth_chunk_list *)phdr; 6525 num_chunks = plen - sizeof(*chunks); 6526 if (stcb->asoc.peer_auth_chunks != NULL) 6527 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6528 else 6529 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6530 for (i = 0; i < num_chunks; i++) { 6531 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6532 stcb->asoc.peer_auth_chunks); 6533 /* record asconf/asconf-ack if listed */ 6534 if (chunks->chunk_types[i] == SCTP_ASCONF) 6535 saw_asconf = 1; 6536 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6537 saw_asconf_ack = 1; 6538 } 6539 got_chklist = 1; 6540 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6541 (ptype == SCTP_STATE_COOKIE) || 6542 (ptype == SCTP_UNRECOG_PARAM) || 6543 (ptype == SCTP_COOKIE_PRESERVE) || 6544 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6545 (ptype == SCTP_ADD_IP_ADDRESS) || 6546 (ptype == SCTP_DEL_IP_ADDRESS) || 6547 (ptype == SCTP_ERROR_CAUSE_IND) || 6548 (ptype == SCTP_SUCCESS_REPORT)) { 6549 /* don't care */ 6550 } else { 6551 if ((ptype & 0x8000) == 0x0000) { 6552 /* 6553 * must stop processing the rest of the 6554 * param's. Any report bits were handled 6555 * with the call to 6556 * sctp_arethere_unrecognized_parameters() 6557 * when the INIT or INIT-ACK was first seen. 6558 */ 6559 break; 6560 } 6561 } 6562 6563 next_param: 6564 offset += SCTP_SIZE32(plen); 6565 if (offset >= limit) { 6566 break; 6567 } 6568 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6569 sizeof(param_buf)); 6570 } 6571 /* Now check to see if we need to purge any addresses */ 6572 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6573 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6574 SCTP_ADDR_NOT_IN_ASSOC) { 6575 /* This address has been removed from the asoc */ 6576 /* remove and free it */ 6577 stcb->asoc.numnets--; 6578 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6579 if (net == stcb->asoc.alternate) { 6580 sctp_free_remote_addr(stcb->asoc.alternate); 6581 stcb->asoc.alternate = NULL; 6582 } 6583 if (net == stcb->asoc.primary_destination) { 6584 stcb->asoc.primary_destination = NULL; 6585 sctp_select_primary_destination(stcb); 6586 } 6587 sctp_free_remote_addr(net); 6588 } 6589 } 6590 if ((stcb->asoc.ecn_supported == 1) && 6591 (peer_supports_ecn == 0)) { 6592 stcb->asoc.ecn_supported = 0; 6593 } 6594 if ((stcb->asoc.prsctp_supported == 1) && 6595 (peer_supports_prsctp == 0)) { 6596 stcb->asoc.prsctp_supported = 0; 6597 } 6598 if ((stcb->asoc.auth_supported == 1) && 6599 ((peer_supports_auth == 0) || 6600 (got_random == 0) || (got_hmacs == 0))) { 6601 stcb->asoc.auth_supported = 0; 6602 } 6603 if ((stcb->asoc.asconf_supported == 1) && 6604 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6605 (stcb->asoc.auth_supported == 0) || 6606 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6607 stcb->asoc.asconf_supported = 0; 6608 } 6609 if ((stcb->asoc.reconfig_supported == 1) && 6610 (peer_supports_reconfig == 0)) { 6611 stcb->asoc.reconfig_supported = 0; 6612 } 6613 if ((stcb->asoc.idata_supported == 1) && 6614 (peer_supports_idata == 0)) { 6615 stcb->asoc.idata_supported = 0; 6616 } 6617 if ((stcb->asoc.nrsack_supported == 1) && 6618 (peer_supports_nrsack == 0)) { 6619 stcb->asoc.nrsack_supported = 0; 6620 } 6621 if ((stcb->asoc.pktdrop_supported == 1) && 6622 (peer_supports_pktdrop == 0)) { 6623 stcb->asoc.pktdrop_supported = 0; 6624 } 6625 /* validate authentication required parameters */ 6626 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6627 /* peer does not support auth but sent a chunks list? */ 6628 return (-31); 6629 } 6630 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6631 /* peer supports asconf but not auth? */ 6632 return (-32); 6633 } else if ((peer_supports_asconf == 1) && 6634 (peer_supports_auth == 1) && 6635 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6636 return (-33); 6637 } 6638 /* concatenate the full random key */ 6639 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6640 if (chunks != NULL) { 6641 keylen += sizeof(*chunks) + num_chunks; 6642 } 6643 new_key = sctp_alloc_key(keylen); 6644 if (new_key != NULL) { 6645 /* copy in the RANDOM */ 6646 if (p_random != NULL) { 6647 keylen = sizeof(*p_random) + random_len; 6648 memcpy(new_key->key, p_random, keylen); 6649 } else { 6650 keylen = 0; 6651 } 6652 /* append in the AUTH chunks */ 6653 if (chunks != NULL) { 6654 memcpy(new_key->key + keylen, chunks, 6655 sizeof(*chunks) + num_chunks); 6656 keylen += sizeof(*chunks) + num_chunks; 6657 } 6658 /* append in the HMACs */ 6659 if (hmacs != NULL) { 6660 memcpy(new_key->key + keylen, hmacs, 6661 sizeof(*hmacs) + hmacs_len); 6662 } 6663 } else { 6664 /* failed to get memory for the key */ 6665 return (-34); 6666 } 6667 if (stcb->asoc.authinfo.peer_random != NULL) 6668 sctp_free_key(stcb->asoc.authinfo.peer_random); 6669 stcb->asoc.authinfo.peer_random = new_key; 6670 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6671 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6672 6673 return (0); 6674 } 6675 6676 int 6677 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6678 struct sctp_nets *net) 6679 { 6680 /* make sure the requested primary address exists in the assoc */ 6681 if (net == NULL && sa) 6682 net = sctp_findnet(stcb, sa); 6683 6684 if (net == NULL) { 6685 /* didn't find the requested primary address! */ 6686 return (-1); 6687 } else { 6688 /* set the primary address */ 6689 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6690 /* Must be confirmed, so queue to set */ 6691 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6692 return (0); 6693 } 6694 stcb->asoc.primary_destination = net; 6695 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6696 sctp_free_remote_addr(stcb->asoc.alternate); 6697 stcb->asoc.alternate = NULL; 6698 } 6699 net = TAILQ_FIRST(&stcb->asoc.nets); 6700 if (net != stcb->asoc.primary_destination) { 6701 /* 6702 * first one on the list is NOT the primary 6703 * sctp_cmpaddr() is much more efficient if the 6704 * primary is the first on the list, make it so. 6705 */ 6706 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6707 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6708 } 6709 return (0); 6710 } 6711 } 6712 6713 bool 6714 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6715 { 6716 struct sctpasochead *head; 6717 struct sctp_tcb *stcb; 6718 6719 SCTP_INP_INFO_LOCK_ASSERT(); 6720 6721 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, SCTP_BASE_INFO(hashasocmark))]; 6722 LIST_FOREACH(stcb, head, sctp_asocs) { 6723 /* 6724 * We choose not to lock anything here. TCB's can't be 6725 * removed since we have the read lock, so they can't be 6726 * freed on us, same thing for the INP. I may be wrong with 6727 * this assumption, but we will go with it for now :-) 6728 */ 6729 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6730 continue; 6731 } 6732 if (stcb->asoc.my_vtag == tag) { 6733 /* candidate */ 6734 if (stcb->rport != rport) { 6735 continue; 6736 } 6737 if (stcb->sctp_ep->sctp_lport != lport) { 6738 continue; 6739 } 6740 /* The tag is currently used, so don't use it. */ 6741 return (false); 6742 } 6743 } 6744 return (!sctp_is_in_timewait(tag, lport, rport, (uint32_t)now->tv_sec)); 6745 } 6746 6747 static void 6748 sctp_drain_mbufs(struct sctp_tcb *stcb) 6749 { 6750 /* 6751 * We must hunt this association for MBUF's past the cumack (i.e. 6752 * out of order data that we can renege on). 6753 */ 6754 struct sctp_association *asoc; 6755 struct sctp_tmit_chunk *chk, *nchk; 6756 uint32_t cumulative_tsn_p1; 6757 struct sctp_queued_to_read *control, *ncontrol; 6758 int cnt, strmat; 6759 uint32_t gap, i; 6760 int fnd = 0; 6761 6762 /* We look for anything larger than the cum-ack + 1 */ 6763 6764 asoc = &stcb->asoc; 6765 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6766 /* none we can reneg on. */ 6767 return; 6768 } 6769 SCTP_STAT_INCR(sctps_protocol_drains_done); 6770 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6771 cnt = 0; 6772 /* Ok that was fun, now we will drain all the inbound streams? */ 6773 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6774 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6775 #ifdef INVARIANTS 6776 if (control->on_strm_q != SCTP_ON_ORDERED) { 6777 panic("Huh control: %p on_q: %d -- not ordered?", 6778 control, control->on_strm_q); 6779 } 6780 #endif 6781 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6782 /* Yep it is above cum-ack */ 6783 cnt++; 6784 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6785 KASSERT(control->length > 0, ("control has zero length")); 6786 if (asoc->size_on_all_streams >= control->length) { 6787 asoc->size_on_all_streams -= control->length; 6788 } else { 6789 #ifdef INVARIANTS 6790 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6791 #else 6792 asoc->size_on_all_streams = 0; 6793 #endif 6794 } 6795 sctp_ucount_decr(asoc->cnt_on_all_streams); 6796 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6797 if (control->on_read_q) { 6798 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6799 control->on_read_q = 0; 6800 } 6801 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6802 control->on_strm_q = 0; 6803 if (control->data) { 6804 sctp_m_freem(control->data); 6805 control->data = NULL; 6806 } 6807 sctp_free_remote_addr(control->whoFrom); 6808 /* Now its reasm? */ 6809 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6810 cnt++; 6811 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6812 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6813 if (asoc->size_on_reasm_queue >= chk->send_size) { 6814 asoc->size_on_reasm_queue -= chk->send_size; 6815 } else { 6816 #ifdef INVARIANTS 6817 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6818 #else 6819 asoc->size_on_reasm_queue = 0; 6820 #endif 6821 } 6822 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6823 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6824 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6825 if (chk->data) { 6826 sctp_m_freem(chk->data); 6827 chk->data = NULL; 6828 } 6829 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6830 } 6831 sctp_free_a_readq(stcb, control); 6832 } 6833 } 6834 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6835 #ifdef INVARIANTS 6836 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6837 panic("Huh control: %p on_q: %d -- not unordered?", 6838 control, control->on_strm_q); 6839 } 6840 #endif 6841 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6842 /* Yep it is above cum-ack */ 6843 cnt++; 6844 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6845 KASSERT(control->length > 0, ("control has zero length")); 6846 if (asoc->size_on_all_streams >= control->length) { 6847 asoc->size_on_all_streams -= control->length; 6848 } else { 6849 #ifdef INVARIANTS 6850 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6851 #else 6852 asoc->size_on_all_streams = 0; 6853 #endif 6854 } 6855 sctp_ucount_decr(asoc->cnt_on_all_streams); 6856 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6857 if (control->on_read_q) { 6858 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6859 control->on_read_q = 0; 6860 } 6861 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6862 control->on_strm_q = 0; 6863 if (control->data) { 6864 sctp_m_freem(control->data); 6865 control->data = NULL; 6866 } 6867 sctp_free_remote_addr(control->whoFrom); 6868 /* Now its reasm? */ 6869 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6870 cnt++; 6871 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6872 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6873 if (asoc->size_on_reasm_queue >= chk->send_size) { 6874 asoc->size_on_reasm_queue -= chk->send_size; 6875 } else { 6876 #ifdef INVARIANTS 6877 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6878 #else 6879 asoc->size_on_reasm_queue = 0; 6880 #endif 6881 } 6882 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6883 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6884 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6885 if (chk->data) { 6886 sctp_m_freem(chk->data); 6887 chk->data = NULL; 6888 } 6889 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6890 } 6891 sctp_free_a_readq(stcb, control); 6892 } 6893 } 6894 } 6895 if (cnt) { 6896 /* We must back down to see what the new highest is */ 6897 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6898 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6899 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6900 asoc->highest_tsn_inside_map = i; 6901 fnd = 1; 6902 break; 6903 } 6904 } 6905 if (!fnd) { 6906 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6907 } 6908 6909 /* 6910 * Question, should we go through the delivery queue? The 6911 * only reason things are on here is the app not reading OR 6912 * a p-d-api up. An attacker COULD send enough in to 6913 * initiate the PD-API and then send a bunch of stuff to 6914 * other streams... these would wind up on the delivery 6915 * queue.. and then we would not get to them. But in order 6916 * to do this I then have to back-track and un-deliver 6917 * sequence numbers in streams.. el-yucko. I think for now 6918 * we will NOT look at the delivery queue and leave it to be 6919 * something to consider later. An alternative would be to 6920 * abort the P-D-API with a notification and then deliver 6921 * the data.... Or another method might be to keep track of 6922 * how many times the situation occurs and if we see a 6923 * possible attack underway just abort the association. 6924 */ 6925 #ifdef SCTP_DEBUG 6926 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6927 #endif 6928 /* 6929 * Now do we need to find a new 6930 * asoc->highest_tsn_inside_map? 6931 */ 6932 asoc->last_revoke_count = cnt; 6933 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6934 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6935 /* sa_ignore NO_NULL_CHK */ 6936 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6937 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6938 } 6939 /* 6940 * Another issue, in un-setting the TSN's in the mapping array we 6941 * DID NOT adjust the highest_tsn marker. This will cause one of 6942 * two things to occur. It may cause us to do extra work in checking 6943 * for our mapping array movement. More importantly it may cause us 6944 * to SACK every datagram. This may not be a bad thing though since 6945 * we will recover once we get our cum-ack above and all this stuff 6946 * we dumped recovered. 6947 */ 6948 } 6949 6950 void 6951 sctp_drain() 6952 { 6953 /* 6954 * We must walk the PCB lists for ALL associations here. The system 6955 * is LOW on MBUF's and needs help. This is where reneging will 6956 * occur. We really hope this does NOT happen! 6957 */ 6958 VNET_ITERATOR_DECL(vnet_iter); 6959 VNET_LIST_RLOCK_NOSLEEP(); 6960 VNET_FOREACH(vnet_iter) { 6961 CURVNET_SET(vnet_iter); 6962 struct sctp_inpcb *inp; 6963 struct sctp_tcb *stcb; 6964 6965 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6966 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6967 #ifdef VIMAGE 6968 continue; 6969 #else 6970 return; 6971 #endif 6972 } 6973 SCTP_INP_INFO_RLOCK(); 6974 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6975 /* For each endpoint */ 6976 SCTP_INP_RLOCK(inp); 6977 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6978 /* For each association */ 6979 SCTP_TCB_LOCK(stcb); 6980 sctp_drain_mbufs(stcb); 6981 SCTP_TCB_UNLOCK(stcb); 6982 } 6983 SCTP_INP_RUNLOCK(inp); 6984 } 6985 SCTP_INP_INFO_RUNLOCK(); 6986 CURVNET_RESTORE(); 6987 } 6988 VNET_LIST_RUNLOCK_NOSLEEP(); 6989 } 6990 6991 /* 6992 * start a new iterator 6993 * iterates through all endpoints and associations based on the pcb_state 6994 * flags and asoc_state. "af" (mandatory) is executed for all matching 6995 * assocs and "ef" (optional) is executed when the iterator completes. 6996 * "inpf" (optional) is executed for each new endpoint as it is being 6997 * iterated through. inpe (optional) is called when the inp completes 6998 * its way through all the stcbs. 6999 */ 7000 int 7001 sctp_initiate_iterator(inp_func inpf, 7002 asoc_func af, 7003 inp_func inpe, 7004 uint32_t pcb_state, 7005 uint32_t pcb_features, 7006 uint32_t asoc_state, 7007 void *argp, 7008 uint32_t argi, 7009 end_func ef, 7010 struct sctp_inpcb *s_inp, 7011 uint8_t chunk_output_off) 7012 { 7013 struct sctp_iterator *it = NULL; 7014 7015 if (af == NULL) { 7016 return (-1); 7017 } 7018 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7019 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7020 SCTP_BASE_VAR(sctp_pcb_initialized)); 7021 return (-1); 7022 } 7023 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7024 SCTP_M_ITER); 7025 if (it == NULL) { 7026 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7027 return (-1); 7028 } 7029 memset(it, 0, sizeof(*it)); 7030 it->function_assoc = af; 7031 it->function_inp = inpf; 7032 if (inpf) 7033 it->done_current_ep = 0; 7034 else 7035 it->done_current_ep = 1; 7036 it->function_atend = ef; 7037 it->pointer = argp; 7038 it->val = argi; 7039 it->pcb_flags = pcb_state; 7040 it->pcb_features = pcb_features; 7041 it->asoc_state = asoc_state; 7042 it->function_inp_end = inpe; 7043 it->no_chunk_output = chunk_output_off; 7044 it->vn = curvnet; 7045 if (s_inp) { 7046 /* Assume lock is held here */ 7047 it->inp = s_inp; 7048 SCTP_INP_INCR_REF(it->inp); 7049 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7050 } else { 7051 SCTP_INP_INFO_RLOCK(); 7052 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7053 if (it->inp) { 7054 SCTP_INP_INCR_REF(it->inp); 7055 } 7056 SCTP_INP_INFO_RUNLOCK(); 7057 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7058 } 7059 SCTP_IPI_ITERATOR_WQ_LOCK(); 7060 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7061 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7062 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7063 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7064 SCTP_FREE(it, SCTP_M_ITER); 7065 return (-1); 7066 } 7067 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7068 if (sctp_it_ctl.iterator_running == 0) { 7069 sctp_wakeup_iterator(); 7070 } 7071 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7072 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7073 return (0); 7074 } 7075