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 == NULL) { 1550 SCTP_PRINTF("TSNH ep_associd\n"); 1551 return (NULL); 1552 } 1553 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1554 SCTP_PRINTF("TSNH ep_associd0\n"); 1555 return (NULL); 1556 } 1557 id = (uint32_t)asoc_id; 1558 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1559 if (head == NULL) { 1560 /* invalid id TSNH */ 1561 SCTP_PRINTF("TSNH ep_associd1\n"); 1562 return (NULL); 1563 } 1564 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1565 if (stcb->asoc.assoc_id == id) { 1566 if (inp != stcb->sctp_ep) { 1567 /* 1568 * some other guy has the same id active (id 1569 * collision ??). 1570 */ 1571 SCTP_PRINTF("TSNH ep_associd2\n"); 1572 continue; 1573 } 1574 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1575 continue; 1576 } 1577 if (want_lock) { 1578 SCTP_TCB_LOCK(stcb); 1579 } 1580 return (stcb); 1581 } 1582 } 1583 return (NULL); 1584 } 1585 1586 struct sctp_tcb * 1587 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1588 { 1589 struct sctp_tcb *stcb; 1590 1591 SCTP_INP_RLOCK(inp); 1592 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1593 SCTP_INP_RUNLOCK(inp); 1594 return (stcb); 1595 } 1596 1597 /* 1598 * Endpoint probe expects that the INP_INFO is locked. 1599 */ 1600 static struct sctp_inpcb * 1601 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1602 uint16_t lport, uint32_t vrf_id) 1603 { 1604 struct sctp_inpcb *inp; 1605 struct sctp_laddr *laddr; 1606 #ifdef INET 1607 struct sockaddr_in *sin; 1608 #endif 1609 #ifdef INET6 1610 struct sockaddr_in6 *sin6; 1611 struct sockaddr_in6 *intf_addr6; 1612 #endif 1613 int fnd; 1614 1615 #ifdef INET 1616 sin = NULL; 1617 #endif 1618 #ifdef INET6 1619 sin6 = NULL; 1620 #endif 1621 switch (nam->sa_family) { 1622 #ifdef INET 1623 case AF_INET: 1624 sin = (struct sockaddr_in *)nam; 1625 break; 1626 #endif 1627 #ifdef INET6 1628 case AF_INET6: 1629 sin6 = (struct sockaddr_in6 *)nam; 1630 break; 1631 #endif 1632 default: 1633 /* unsupported family */ 1634 return (NULL); 1635 } 1636 1637 if (head == NULL) 1638 return (NULL); 1639 1640 LIST_FOREACH(inp, head, sctp_hash) { 1641 SCTP_INP_RLOCK(inp); 1642 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1643 SCTP_INP_RUNLOCK(inp); 1644 continue; 1645 } 1646 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1647 (inp->sctp_lport == lport)) { 1648 /* got it */ 1649 switch (nam->sa_family) { 1650 #ifdef INET 1651 case AF_INET: 1652 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1653 SCTP_IPV6_V6ONLY(inp)) { 1654 /* 1655 * IPv4 on a IPv6 socket with ONLY 1656 * IPv6 set 1657 */ 1658 SCTP_INP_RUNLOCK(inp); 1659 continue; 1660 } 1661 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1662 &sin->sin_addr) != 0) { 1663 SCTP_INP_RUNLOCK(inp); 1664 continue; 1665 } 1666 break; 1667 #endif 1668 #ifdef INET6 1669 case AF_INET6: 1670 /* 1671 * A V6 address and the endpoint is NOT 1672 * bound V6 1673 */ 1674 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1675 SCTP_INP_RUNLOCK(inp); 1676 continue; 1677 } 1678 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1679 &sin6->sin6_addr) != 0) { 1680 SCTP_INP_RUNLOCK(inp); 1681 continue; 1682 } 1683 break; 1684 #endif 1685 default: 1686 break; 1687 } 1688 /* does a VRF id match? */ 1689 fnd = 0; 1690 if (inp->def_vrf_id == vrf_id) 1691 fnd = 1; 1692 1693 SCTP_INP_RUNLOCK(inp); 1694 if (!fnd) 1695 continue; 1696 return (inp); 1697 } 1698 SCTP_INP_RUNLOCK(inp); 1699 } 1700 switch (nam->sa_family) { 1701 #ifdef INET 1702 case AF_INET: 1703 if (sin->sin_addr.s_addr == INADDR_ANY) { 1704 /* Can't hunt for one that has no address specified */ 1705 return (NULL); 1706 } 1707 break; 1708 #endif 1709 #ifdef INET6 1710 case AF_INET6: 1711 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1712 /* Can't hunt for one that has no address specified */ 1713 return (NULL); 1714 } 1715 break; 1716 #endif 1717 default: 1718 break; 1719 } 1720 /* 1721 * ok, not bound to all so see if we can find a EP bound to this 1722 * address. 1723 */ 1724 LIST_FOREACH(inp, head, sctp_hash) { 1725 SCTP_INP_RLOCK(inp); 1726 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1727 SCTP_INP_RUNLOCK(inp); 1728 continue; 1729 } 1730 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1731 SCTP_INP_RUNLOCK(inp); 1732 continue; 1733 } 1734 /* 1735 * Ok this could be a likely candidate, look at all of its 1736 * addresses 1737 */ 1738 if (inp->sctp_lport != lport) { 1739 SCTP_INP_RUNLOCK(inp); 1740 continue; 1741 } 1742 /* does a VRF id match? */ 1743 fnd = 0; 1744 if (inp->def_vrf_id == vrf_id) 1745 fnd = 1; 1746 1747 if (!fnd) { 1748 SCTP_INP_RUNLOCK(inp); 1749 continue; 1750 } 1751 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1752 if (laddr->ifa == NULL) { 1753 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1754 __func__); 1755 continue; 1756 } 1757 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1758 (void *)laddr->ifa); 1759 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1760 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1761 continue; 1762 } 1763 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1764 /* possible, see if it matches */ 1765 switch (nam->sa_family) { 1766 #ifdef INET 1767 case AF_INET: 1768 if (sin->sin_addr.s_addr == 1769 laddr->ifa->address.sin.sin_addr.s_addr) { 1770 SCTP_INP_RUNLOCK(inp); 1771 return (inp); 1772 } 1773 break; 1774 #endif 1775 #ifdef INET6 1776 case AF_INET6: 1777 intf_addr6 = &laddr->ifa->address.sin6; 1778 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1779 intf_addr6)) { 1780 SCTP_INP_RUNLOCK(inp); 1781 return (inp); 1782 } 1783 break; 1784 #endif 1785 } 1786 } 1787 } 1788 SCTP_INP_RUNLOCK(inp); 1789 } 1790 return (NULL); 1791 } 1792 1793 static struct sctp_inpcb * 1794 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1795 { 1796 struct sctppcbhead *head; 1797 struct sctp_inpcb *t_inp; 1798 int fnd; 1799 1800 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1801 SCTP_BASE_INFO(hashmark))]; 1802 LIST_FOREACH(t_inp, head, sctp_hash) { 1803 if (t_inp->sctp_lport != lport) { 1804 continue; 1805 } 1806 /* is it in the VRF in question */ 1807 fnd = 0; 1808 if (t_inp->def_vrf_id == vrf_id) 1809 fnd = 1; 1810 if (!fnd) 1811 continue; 1812 1813 /* This one is in use. */ 1814 /* check the v6/v4 binding issue */ 1815 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1816 SCTP_IPV6_V6ONLY(t_inp)) { 1817 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1818 /* collision in V6 space */ 1819 return (t_inp); 1820 } else { 1821 /* inp is BOUND_V4 no conflict */ 1822 continue; 1823 } 1824 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1825 /* t_inp is bound v4 and v6, conflict always */ 1826 return (t_inp); 1827 } else { 1828 /* t_inp is bound only V4 */ 1829 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1830 SCTP_IPV6_V6ONLY(inp)) { 1831 /* no conflict */ 1832 continue; 1833 } 1834 /* else fall through to conflict */ 1835 } 1836 return (t_inp); 1837 } 1838 return (NULL); 1839 } 1840 1841 int 1842 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1843 { 1844 /* For 1-2-1 with port reuse */ 1845 struct sctppcbhead *head; 1846 struct sctp_inpcb *tinp, *ninp; 1847 1848 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1849 /* only works with port reuse on */ 1850 return (-1); 1851 } 1852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1853 return (0); 1854 } 1855 SCTP_INP_RUNLOCK(inp); 1856 SCTP_INP_INFO_WLOCK(); 1857 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1858 SCTP_BASE_INFO(hashmark))]; 1859 /* Kick out all non-listeners to the TCP hash */ 1860 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1861 if (tinp->sctp_lport != inp->sctp_lport) { 1862 continue; 1863 } 1864 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1865 continue; 1866 } 1867 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1868 continue; 1869 } 1870 if (SCTP_IS_LISTENING(tinp)) { 1871 continue; 1872 } 1873 SCTP_INP_WLOCK(tinp); 1874 LIST_REMOVE(tinp, sctp_hash); 1875 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1876 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1877 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1878 SCTP_INP_WUNLOCK(tinp); 1879 } 1880 SCTP_INP_WLOCK(inp); 1881 /* Pull from where he was */ 1882 LIST_REMOVE(inp, sctp_hash); 1883 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1884 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1885 LIST_INSERT_HEAD(head, inp, sctp_hash); 1886 SCTP_INP_WUNLOCK(inp); 1887 SCTP_INP_RLOCK(inp); 1888 SCTP_INP_INFO_WUNLOCK(); 1889 return (0); 1890 } 1891 1892 struct sctp_inpcb * 1893 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1894 uint32_t vrf_id) 1895 { 1896 /* 1897 * First we check the hash table to see if someone has this port 1898 * bound with just the port. 1899 */ 1900 struct sctp_inpcb *inp; 1901 struct sctppcbhead *head; 1902 int lport; 1903 unsigned int i; 1904 #ifdef INET 1905 struct sockaddr_in *sin; 1906 #endif 1907 #ifdef INET6 1908 struct sockaddr_in6 *sin6; 1909 #endif 1910 1911 switch (nam->sa_family) { 1912 #ifdef INET 1913 case AF_INET: 1914 sin = (struct sockaddr_in *)nam; 1915 lport = sin->sin_port; 1916 break; 1917 #endif 1918 #ifdef INET6 1919 case AF_INET6: 1920 sin6 = (struct sockaddr_in6 *)nam; 1921 lport = sin6->sin6_port; 1922 break; 1923 #endif 1924 default: 1925 return (NULL); 1926 } 1927 /* 1928 * I could cheat here and just cast to one of the types but we will 1929 * do it right. It also provides the check against an Unsupported 1930 * type too. 1931 */ 1932 /* Find the head of the ALLADDR chain */ 1933 if (have_lock == 0) { 1934 SCTP_INP_INFO_RLOCK(); 1935 } 1936 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1937 SCTP_BASE_INFO(hashmark))]; 1938 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1939 1940 /* 1941 * If the TCP model exists it could be that the main listening 1942 * endpoint is gone but there still exists a connected socket for 1943 * this guy. If so we can return the first one that we find. This 1944 * may NOT be the correct one so the caller should be wary on the 1945 * returned INP. Currently the only caller that sets find_tcp_pool 1946 * is in bindx where we are verifying that a user CAN bind the 1947 * address. He either has bound it already, or someone else has, or 1948 * its open to bind, so this is good enough. 1949 */ 1950 if (inp == NULL && find_tcp_pool) { 1951 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1952 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1953 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1954 if (inp) { 1955 break; 1956 } 1957 } 1958 } 1959 if (inp) { 1960 SCTP_INP_INCR_REF(inp); 1961 } 1962 if (have_lock == 0) { 1963 SCTP_INP_INFO_RUNLOCK(); 1964 } 1965 return (inp); 1966 } 1967 1968 /* 1969 * Find an association for an endpoint with the pointer to whom you want to 1970 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1971 * need to change the *to to some other struct like a mbuf... 1972 */ 1973 struct sctp_tcb * 1974 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1975 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1976 uint32_t vrf_id) 1977 { 1978 struct sctp_inpcb *inp = NULL; 1979 struct sctp_tcb *stcb; 1980 1981 SCTP_INP_INFO_RLOCK(); 1982 if (find_tcp_pool) { 1983 if (inp_p != NULL) { 1984 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1985 vrf_id); 1986 } else { 1987 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1988 vrf_id); 1989 } 1990 if (stcb != NULL) { 1991 SCTP_INP_INFO_RUNLOCK(); 1992 return (stcb); 1993 } 1994 } 1995 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1996 if (inp_p != NULL) { 1997 *inp_p = inp; 1998 } 1999 SCTP_INP_INFO_RUNLOCK(); 2000 if (inp == NULL) { 2001 return (NULL); 2002 } 2003 /* 2004 * ok, we have an endpoint, now lets find the assoc for it (if any) 2005 * we now place the source address or from in the to of the find 2006 * endpoint call. Since in reality this chain is used from the 2007 * inbound packet side. 2008 */ 2009 if (inp_p != NULL) { 2010 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2011 NULL); 2012 } else { 2013 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2014 NULL); 2015 } 2016 return (stcb); 2017 } 2018 2019 /* 2020 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2021 * find all addresses that the sender has specified in any address list. Each 2022 * address will be used to lookup the TCB and see if one exits. 2023 */ 2024 static struct sctp_tcb * 2025 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2026 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2027 struct sockaddr *dst) 2028 { 2029 struct sctp_paramhdr *phdr, param_buf; 2030 #if defined(INET) || defined(INET6) 2031 struct sctp_tcb *stcb; 2032 uint16_t ptype; 2033 #endif 2034 uint16_t plen; 2035 #ifdef INET 2036 struct sockaddr_in sin4; 2037 #endif 2038 #ifdef INET6 2039 struct sockaddr_in6 sin6; 2040 #endif 2041 2042 #ifdef INET 2043 memset(&sin4, 0, sizeof(sin4)); 2044 sin4.sin_len = sizeof(sin4); 2045 sin4.sin_family = AF_INET; 2046 sin4.sin_port = sh->src_port; 2047 #endif 2048 #ifdef INET6 2049 memset(&sin6, 0, sizeof(sin6)); 2050 sin6.sin6_len = sizeof(sin6); 2051 sin6.sin6_family = AF_INET6; 2052 sin6.sin6_port = sh->src_port; 2053 #endif 2054 2055 offset += sizeof(struct sctp_init_chunk); 2056 2057 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2058 while (phdr != NULL) { 2059 /* now we must see if we want the parameter */ 2060 #if defined(INET) || defined(INET6) 2061 ptype = ntohs(phdr->param_type); 2062 #endif 2063 plen = ntohs(phdr->param_length); 2064 if (plen == 0) { 2065 break; 2066 } 2067 #ifdef INET 2068 if (ptype == SCTP_IPV4_ADDRESS && 2069 plen == sizeof(struct sctp_ipv4addr_param)) { 2070 /* Get the rest of the address */ 2071 struct sctp_ipv4addr_param ip4_param, *p4; 2072 2073 phdr = sctp_get_next_param(m, offset, 2074 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2075 if (phdr == NULL) { 2076 return (NULL); 2077 } 2078 p4 = (struct sctp_ipv4addr_param *)phdr; 2079 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2080 /* look it up */ 2081 stcb = sctp_findassociation_ep_addr(inp_p, 2082 (struct sockaddr *)&sin4, netp, dst, NULL); 2083 if (stcb != NULL) { 2084 return (stcb); 2085 } 2086 } 2087 #endif 2088 #ifdef INET6 2089 if (ptype == SCTP_IPV6_ADDRESS && 2090 plen == sizeof(struct sctp_ipv6addr_param)) { 2091 /* Get the rest of the address */ 2092 struct sctp_ipv6addr_param ip6_param, *p6; 2093 2094 phdr = sctp_get_next_param(m, offset, 2095 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2096 if (phdr == NULL) { 2097 return (NULL); 2098 } 2099 p6 = (struct sctp_ipv6addr_param *)phdr; 2100 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2101 /* look it up */ 2102 stcb = sctp_findassociation_ep_addr(inp_p, 2103 (struct sockaddr *)&sin6, netp, dst, NULL); 2104 if (stcb != NULL) { 2105 return (stcb); 2106 } 2107 } 2108 #endif 2109 offset += SCTP_SIZE32(plen); 2110 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2111 sizeof(param_buf)); 2112 } 2113 return (NULL); 2114 } 2115 2116 static struct sctp_tcb * 2117 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2118 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2119 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2120 { 2121 /* 2122 * Use my vtag to hash. If we find it we then verify the source addr 2123 * is in the assoc. If all goes well we save a bit on rec of a 2124 * packet. 2125 */ 2126 struct sctpasochead *head; 2127 struct sctp_nets *net; 2128 struct sctp_tcb *stcb; 2129 2130 SCTP_INP_INFO_RLOCK(); 2131 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2132 SCTP_BASE_INFO(hashasocmark))]; 2133 LIST_FOREACH(stcb, head, sctp_asocs) { 2134 SCTP_INP_RLOCK(stcb->sctp_ep); 2135 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2136 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2137 continue; 2138 } 2139 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2140 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2141 continue; 2142 } 2143 SCTP_TCB_LOCK(stcb); 2144 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2145 if (stcb->asoc.my_vtag == vtag) { 2146 /* candidate */ 2147 if (stcb->rport != rport) { 2148 SCTP_TCB_UNLOCK(stcb); 2149 continue; 2150 } 2151 if (stcb->sctp_ep->sctp_lport != lport) { 2152 SCTP_TCB_UNLOCK(stcb); 2153 continue; 2154 } 2155 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2156 SCTP_TCB_UNLOCK(stcb); 2157 continue; 2158 } 2159 /* RRS:Need toaddr check here */ 2160 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2161 /* Endpoint does not own this address */ 2162 SCTP_TCB_UNLOCK(stcb); 2163 continue; 2164 } 2165 if (remote_tag) { 2166 /* 2167 * If we have both vtags that's all we match 2168 * on 2169 */ 2170 if (stcb->asoc.peer_vtag == remote_tag) { 2171 /* 2172 * If both tags match we consider it 2173 * conclusive and check NO 2174 * source/destination addresses 2175 */ 2176 goto conclusive; 2177 } 2178 } 2179 if (skip_src_check) { 2180 conclusive: 2181 if (from) { 2182 *netp = sctp_findnet(stcb, from); 2183 } else { 2184 *netp = NULL; /* unknown */ 2185 } 2186 if (inp_p) 2187 *inp_p = stcb->sctp_ep; 2188 SCTP_INP_INFO_RUNLOCK(); 2189 return (stcb); 2190 } 2191 net = sctp_findnet(stcb, from); 2192 if (net) { 2193 /* yep its him. */ 2194 *netp = net; 2195 SCTP_STAT_INCR(sctps_vtagexpress); 2196 *inp_p = stcb->sctp_ep; 2197 SCTP_INP_INFO_RUNLOCK(); 2198 return (stcb); 2199 } else { 2200 /* 2201 * not him, this should only happen in rare 2202 * cases so I peg it. 2203 */ 2204 SCTP_STAT_INCR(sctps_vtagbogus); 2205 } 2206 } 2207 SCTP_TCB_UNLOCK(stcb); 2208 } 2209 SCTP_INP_INFO_RUNLOCK(); 2210 return (NULL); 2211 } 2212 2213 /* 2214 * Find an association with the pointer to the inbound IP packet. This can be 2215 * a IPv4 or IPv6 packet. 2216 */ 2217 struct sctp_tcb * 2218 sctp_findassociation_addr(struct mbuf *m, int offset, 2219 struct sockaddr *src, struct sockaddr *dst, 2220 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2221 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2222 { 2223 struct sctp_tcb *stcb; 2224 struct sctp_inpcb *inp; 2225 2226 if (sh->v_tag) { 2227 /* we only go down this path if vtag is non-zero */ 2228 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2229 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2230 if (stcb) { 2231 return (stcb); 2232 } 2233 } 2234 2235 if (inp_p) { 2236 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2237 1, vrf_id); 2238 inp = *inp_p; 2239 } else { 2240 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2241 1, vrf_id); 2242 } 2243 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2244 if (stcb == NULL && inp) { 2245 /* Found a EP but not this address */ 2246 if ((ch->chunk_type == SCTP_INITIATION) || 2247 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2248 /*- 2249 * special hook, we do NOT return linp or an 2250 * association that is linked to an existing 2251 * association that is under the TCP pool (i.e. no 2252 * listener exists). The endpoint finding routine 2253 * will always find a listener before examining the 2254 * TCP pool. 2255 */ 2256 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2257 if (inp_p) { 2258 *inp_p = NULL; 2259 } 2260 return (NULL); 2261 } 2262 stcb = sctp_findassociation_special_addr(m, 2263 offset, sh, &inp, netp, dst); 2264 if (inp_p != NULL) { 2265 *inp_p = inp; 2266 } 2267 } 2268 } 2269 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2270 return (stcb); 2271 } 2272 2273 /* 2274 * lookup an association by an ASCONF lookup address. 2275 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2276 */ 2277 struct sctp_tcb * 2278 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2279 struct sockaddr *dst, struct sctphdr *sh, 2280 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2281 { 2282 struct sctp_tcb *stcb; 2283 union sctp_sockstore remote_store; 2284 struct sctp_paramhdr param_buf, *phdr; 2285 int ptype; 2286 int zero_address = 0; 2287 #ifdef INET 2288 struct sockaddr_in *sin; 2289 #endif 2290 #ifdef INET6 2291 struct sockaddr_in6 *sin6; 2292 #endif 2293 2294 memset(&remote_store, 0, sizeof(remote_store)); 2295 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2296 ¶m_buf, sizeof(struct sctp_paramhdr)); 2297 if (phdr == NULL) { 2298 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2299 __func__); 2300 return NULL; 2301 } 2302 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2303 /* get the correlation address */ 2304 switch (ptype) { 2305 #ifdef INET6 2306 case SCTP_IPV6_ADDRESS: 2307 { 2308 /* ipv6 address param */ 2309 struct sctp_ipv6addr_param *p6, p6_buf; 2310 2311 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2312 return NULL; 2313 } 2314 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2315 offset + sizeof(struct sctp_asconf_chunk), 2316 &p6_buf.ph, sizeof(p6_buf)); 2317 if (p6 == NULL) { 2318 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2319 __func__); 2320 return (NULL); 2321 } 2322 sin6 = &remote_store.sin6; 2323 sin6->sin6_family = AF_INET6; 2324 sin6->sin6_len = sizeof(*sin6); 2325 sin6->sin6_port = sh->src_port; 2326 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2327 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2328 zero_address = 1; 2329 break; 2330 } 2331 #endif 2332 #ifdef INET 2333 case SCTP_IPV4_ADDRESS: 2334 { 2335 /* ipv4 address param */ 2336 struct sctp_ipv4addr_param *p4, p4_buf; 2337 2338 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2339 return NULL; 2340 } 2341 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2342 offset + sizeof(struct sctp_asconf_chunk), 2343 &p4_buf.ph, sizeof(p4_buf)); 2344 if (p4 == NULL) { 2345 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2346 __func__); 2347 return (NULL); 2348 } 2349 sin = &remote_store.sin; 2350 sin->sin_family = AF_INET; 2351 sin->sin_len = sizeof(*sin); 2352 sin->sin_port = sh->src_port; 2353 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2354 if (sin->sin_addr.s_addr == INADDR_ANY) 2355 zero_address = 1; 2356 break; 2357 } 2358 #endif 2359 default: 2360 /* invalid address param type */ 2361 return NULL; 2362 } 2363 2364 if (zero_address) { 2365 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2366 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2367 if (stcb != NULL) { 2368 SCTP_INP_DECR_REF(*inp_p); 2369 } 2370 } else { 2371 stcb = sctp_findassociation_ep_addr(inp_p, 2372 &remote_store.sa, netp, 2373 dst, NULL); 2374 } 2375 return (stcb); 2376 } 2377 2378 /* 2379 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2380 * addresses. This way if we don't get a bind we by default pick a ephemeral 2381 * port with all addresses bound. 2382 */ 2383 int 2384 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2385 { 2386 /* 2387 * we get called when a new endpoint starts up. We need to allocate 2388 * the sctp_inpcb structure from the zone and init it. Mark it as 2389 * unbound and find a port that we can use as an ephemeral with 2390 * INADDR_ANY. If the user binds later no problem we can then add in 2391 * the specific addresses. And setup the default parameters for the 2392 * EP. 2393 */ 2394 int i, error; 2395 struct sctp_inpcb *inp; 2396 struct sctp_pcb *m; 2397 struct timeval time; 2398 sctp_sharedkey_t *null_key; 2399 2400 error = 0; 2401 2402 SCTP_INP_INFO_WLOCK(); 2403 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2404 if (inp == NULL) { 2405 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2406 SCTP_INP_INFO_WUNLOCK(); 2407 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2408 return (ENOBUFS); 2409 } 2410 /* zap it */ 2411 memset(inp, 0, sizeof(*inp)); 2412 2413 /* bump generations */ 2414 /* setup socket pointers */ 2415 inp->sctp_socket = so; 2416 inp->ip_inp.inp.inp_socket = so; 2417 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2418 #ifdef INET6 2419 if (INP_SOCKAF(so) == AF_INET6) { 2420 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2421 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2422 } 2423 if (MODULE_GLOBAL(ip6_v6only)) { 2424 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2425 } 2426 } 2427 #endif 2428 inp->sctp_associd_counter = 1; 2429 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2430 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2431 inp->max_cwnd = 0; 2432 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2433 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2434 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2435 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2436 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2437 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2438 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2439 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2440 inp->idata_supported = 0; 2441 2442 inp->fibnum = so->so_fibnum; 2443 /* init the small hash table we use to track asocid <-> tcb */ 2444 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2445 if (inp->sctp_asocidhash == NULL) { 2446 crfree(inp->ip_inp.inp.inp_cred); 2447 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2448 SCTP_INP_INFO_WUNLOCK(); 2449 return (ENOBUFS); 2450 } 2451 SCTP_INCR_EP_COUNT(); 2452 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2453 SCTP_INP_INFO_WUNLOCK(); 2454 2455 so->so_pcb = (caddr_t)inp; 2456 2457 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2458 /* UDP style socket */ 2459 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2460 SCTP_PCB_FLAGS_UNBOUND); 2461 /* Be sure it is NON-BLOCKING IO for UDP */ 2462 /* SCTP_SET_SO_NBIO(so); */ 2463 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2464 /* TCP style socket */ 2465 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2466 SCTP_PCB_FLAGS_UNBOUND); 2467 /* Be sure we have blocking IO by default */ 2468 SOCK_LOCK(so); 2469 SCTP_CLEAR_SO_NBIO(so); 2470 SOCK_UNLOCK(so); 2471 } else { 2472 /* 2473 * unsupported socket type (RAW, etc)- in case we missed it 2474 * in protosw 2475 */ 2476 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2477 so->so_pcb = NULL; 2478 crfree(inp->ip_inp.inp.inp_cred); 2479 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2480 return (EOPNOTSUPP); 2481 } 2482 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2483 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2484 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2485 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2486 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2487 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2488 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2489 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2490 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2491 } 2492 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2493 &inp->sctp_hashmark); 2494 if (inp->sctp_tcbhash == NULL) { 2495 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2496 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2497 so->so_pcb = NULL; 2498 crfree(inp->ip_inp.inp.inp_cred); 2499 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2500 return (ENOBUFS); 2501 } 2502 inp->def_vrf_id = vrf_id; 2503 2504 SCTP_INP_INFO_WLOCK(); 2505 SCTP_INP_LOCK_INIT(inp); 2506 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2507 SCTP_INP_READ_INIT(inp); 2508 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2509 /* lock the new ep */ 2510 SCTP_INP_WLOCK(inp); 2511 2512 /* add it to the info area */ 2513 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2514 SCTP_INP_INFO_WUNLOCK(); 2515 2516 TAILQ_INIT(&inp->read_queue); 2517 LIST_INIT(&inp->sctp_addr_list); 2518 2519 LIST_INIT(&inp->sctp_asoc_list); 2520 2521 #ifdef SCTP_TRACK_FREED_ASOCS 2522 /* TEMP CODE */ 2523 LIST_INIT(&inp->sctp_asoc_free_list); 2524 #endif 2525 /* Init the timer structure for signature change */ 2526 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2527 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2528 2529 /* now init the actual endpoint default data */ 2530 m = &inp->sctp_ep; 2531 2532 /* setup the base timeout information */ 2533 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2534 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2535 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2536 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2537 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2538 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2539 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2540 /* all max/min max are in ms */ 2541 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2542 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2543 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2544 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2545 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2546 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2547 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2548 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2549 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2550 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2551 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2552 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2553 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2554 2555 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2556 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2557 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2558 /* number of streams to pre-open on a association */ 2559 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2560 2561 m->default_mtu = 0; 2562 /* Add adaptation cookie */ 2563 m->adaptation_layer_indicator = 0; 2564 m->adaptation_layer_indicator_provided = 0; 2565 2566 /* seed random number generator */ 2567 m->random_counter = 1; 2568 m->store_at = SCTP_SIGNATURE_SIZE; 2569 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2570 sctp_fill_random_store(m); 2571 2572 /* Minimum cookie size */ 2573 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2574 sizeof(struct sctp_state_cookie); 2575 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2576 2577 /* Setup the initial secret */ 2578 (void)SCTP_GETTIME_TIMEVAL(&time); 2579 m->time_of_secret_change = time.tv_sec; 2580 2581 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2582 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2583 } 2584 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2585 2586 /* How long is a cookie good for ? */ 2587 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2588 /* 2589 * Initialize authentication parameters 2590 */ 2591 m->local_hmacs = sctp_default_supported_hmaclist(); 2592 m->local_auth_chunks = sctp_alloc_chunklist(); 2593 if (inp->asconf_supported) { 2594 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2595 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2596 } 2597 m->default_dscp = 0; 2598 #ifdef INET6 2599 m->default_flowlabel = 0; 2600 #endif 2601 m->port = 0; /* encapsulation disabled by default */ 2602 LIST_INIT(&m->shared_keys); 2603 /* add default NULL key as key id 0 */ 2604 null_key = sctp_alloc_sharedkey(); 2605 sctp_insert_sharedkey(&m->shared_keys, null_key); 2606 SCTP_INP_WUNLOCK(inp); 2607 #ifdef SCTP_LOG_CLOSING 2608 sctp_log_closing(inp, NULL, 12); 2609 #endif 2610 return (error); 2611 } 2612 2613 void 2614 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2615 struct sctp_tcb *stcb) 2616 { 2617 struct sctp_nets *net; 2618 uint16_t lport, rport; 2619 struct sctppcbhead *head; 2620 struct sctp_laddr *laddr, *oladdr; 2621 2622 atomic_add_int(&stcb->asoc.refcnt, 1); 2623 SCTP_TCB_UNLOCK(stcb); 2624 SCTP_INP_INFO_WLOCK(); 2625 SCTP_INP_WLOCK(old_inp); 2626 SCTP_INP_WLOCK(new_inp); 2627 SCTP_TCB_LOCK(stcb); 2628 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2629 2630 new_inp->sctp_ep.time_of_secret_change = 2631 old_inp->sctp_ep.time_of_secret_change; 2632 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2633 sizeof(old_inp->sctp_ep.secret_key)); 2634 new_inp->sctp_ep.current_secret_number = 2635 old_inp->sctp_ep.current_secret_number; 2636 new_inp->sctp_ep.last_secret_number = 2637 old_inp->sctp_ep.last_secret_number; 2638 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2639 2640 /* make it so new data pours into the new socket */ 2641 stcb->sctp_socket = new_inp->sctp_socket; 2642 stcb->sctp_ep = new_inp; 2643 2644 /* Copy the port across */ 2645 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2646 rport = stcb->rport; 2647 /* Pull the tcb from the old association */ 2648 LIST_REMOVE(stcb, sctp_tcbhash); 2649 LIST_REMOVE(stcb, sctp_tcblist); 2650 if (stcb->asoc.in_asocid_hash) { 2651 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2652 } 2653 /* Now insert the new_inp into the TCP connected hash */ 2654 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2655 2656 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2657 /* Its safe to access */ 2658 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2659 2660 /* Now move the tcb into the endpoint list */ 2661 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2662 /* 2663 * Question, do we even need to worry about the ep-hash since we 2664 * only have one connection? Probably not :> so lets get rid of it 2665 * and not suck up any kernel memory in that. 2666 */ 2667 if (stcb->asoc.in_asocid_hash) { 2668 struct sctpasochead *lhd; 2669 2670 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2671 new_inp->hashasocidmark)]; 2672 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2673 } 2674 /* Ok. Let's restart timer. */ 2675 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2676 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2677 stcb, net); 2678 } 2679 2680 SCTP_INP_INFO_WUNLOCK(); 2681 if (new_inp->sctp_tcbhash != NULL) { 2682 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2683 new_inp->sctp_tcbhash = NULL; 2684 } 2685 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2686 /* Subset bound, so copy in the laddr list from the old_inp */ 2687 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2688 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2689 if (laddr == NULL) { 2690 /* 2691 * Gak, what can we do? This assoc is really 2692 * HOSED. We probably should send an abort 2693 * here. 2694 */ 2695 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2696 continue; 2697 } 2698 SCTP_INCR_LADDR_COUNT(); 2699 memset(laddr, 0, sizeof(*laddr)); 2700 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2701 laddr->ifa = oladdr->ifa; 2702 atomic_add_int(&laddr->ifa->refcount, 1); 2703 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2704 sctp_nxt_addr); 2705 new_inp->laddr_count++; 2706 if (oladdr == stcb->asoc.last_used_address) { 2707 stcb->asoc.last_used_address = laddr; 2708 } 2709 } 2710 } 2711 /* Now any running timers need to be adjusted. */ 2712 if (stcb->asoc.dack_timer.ep == old_inp) { 2713 SCTP_INP_DECR_REF(old_inp); 2714 stcb->asoc.dack_timer.ep = new_inp; 2715 SCTP_INP_INCR_REF(new_inp); 2716 } 2717 if (stcb->asoc.asconf_timer.ep == old_inp) { 2718 SCTP_INP_DECR_REF(old_inp); 2719 stcb->asoc.asconf_timer.ep = new_inp; 2720 SCTP_INP_INCR_REF(new_inp); 2721 } 2722 if (stcb->asoc.strreset_timer.ep == old_inp) { 2723 SCTP_INP_DECR_REF(old_inp); 2724 stcb->asoc.strreset_timer.ep = new_inp; 2725 SCTP_INP_INCR_REF(new_inp); 2726 } 2727 if (stcb->asoc.shut_guard_timer.ep == old_inp) { 2728 SCTP_INP_DECR_REF(old_inp); 2729 stcb->asoc.shut_guard_timer.ep = new_inp; 2730 SCTP_INP_INCR_REF(new_inp); 2731 } 2732 if (stcb->asoc.autoclose_timer.ep == old_inp) { 2733 SCTP_INP_DECR_REF(old_inp); 2734 stcb->asoc.autoclose_timer.ep = new_inp; 2735 SCTP_INP_INCR_REF(new_inp); 2736 } 2737 if (stcb->asoc.delete_prim_timer.ep == old_inp) { 2738 SCTP_INP_DECR_REF(old_inp); 2739 stcb->asoc.delete_prim_timer.ep = new_inp; 2740 SCTP_INP_INCR_REF(new_inp); 2741 } 2742 /* now what about the nets? */ 2743 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2744 if (net->pmtu_timer.ep == old_inp) { 2745 SCTP_INP_DECR_REF(old_inp); 2746 net->pmtu_timer.ep = new_inp; 2747 SCTP_INP_INCR_REF(new_inp); 2748 } 2749 if (net->hb_timer.ep == old_inp) { 2750 SCTP_INP_DECR_REF(old_inp); 2751 net->hb_timer.ep = new_inp; 2752 SCTP_INP_INCR_REF(new_inp); 2753 } 2754 if (net->rxt_timer.ep == old_inp) { 2755 SCTP_INP_DECR_REF(old_inp); 2756 net->rxt_timer.ep = new_inp; 2757 SCTP_INP_INCR_REF(new_inp); 2758 } 2759 } 2760 SCTP_INP_WUNLOCK(new_inp); 2761 SCTP_INP_WUNLOCK(old_inp); 2762 } 2763 2764 /* 2765 * insert an laddr entry with the given ifa for the desired list 2766 */ 2767 static int 2768 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2769 { 2770 struct sctp_laddr *laddr; 2771 2772 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2773 if (laddr == NULL) { 2774 /* out of memory? */ 2775 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2776 return (EINVAL); 2777 } 2778 SCTP_INCR_LADDR_COUNT(); 2779 memset(laddr, 0, sizeof(*laddr)); 2780 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2781 laddr->ifa = ifa; 2782 laddr->action = act; 2783 atomic_add_int(&ifa->refcount, 1); 2784 /* insert it */ 2785 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2786 2787 return (0); 2788 } 2789 2790 /* 2791 * Remove an laddr entry from the local address list (on an assoc) 2792 */ 2793 static void 2794 sctp_remove_laddr(struct sctp_laddr *laddr) 2795 { 2796 2797 /* remove from the list */ 2798 LIST_REMOVE(laddr, sctp_nxt_addr); 2799 sctp_free_ifa(laddr->ifa); 2800 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2801 SCTP_DECR_LADDR_COUNT(); 2802 } 2803 2804 /* 2805 * Bind the socket, with the PCB and global info locks held. Note, if a 2806 * socket address is specified, the PCB lock may be dropped and re-acquired. 2807 * 2808 * sctp_ifap is used to bypass normal local address validation checks. 2809 */ 2810 int 2811 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr, 2812 struct sctp_ifa *sctp_ifap, struct thread *td) 2813 { 2814 /* bind a ep to a socket address */ 2815 struct sctppcbhead *head; 2816 struct sctp_inpcb *inp_tmp; 2817 struct inpcb *ip_inp; 2818 int port_reuse_active = 0; 2819 int bindall; 2820 uint16_t lport; 2821 int error; 2822 uint32_t vrf_id; 2823 2824 KASSERT(td != NULL, ("%s: null thread", __func__)); 2825 2826 error = 0; 2827 lport = 0; 2828 bindall = 1; 2829 ip_inp = &inp->ip_inp.inp; 2830 2831 SCTP_INP_INFO_WLOCK_ASSERT(); 2832 SCTP_INP_WLOCK_ASSERT(inp); 2833 2834 #ifdef SCTP_DEBUG 2835 if (addr) { 2836 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2837 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2838 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2839 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2840 } 2841 #endif 2842 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2843 error = EINVAL; 2844 /* already did a bind, subsequent binds NOT allowed ! */ 2845 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2846 goto out; 2847 } 2848 if (addr != NULL) { 2849 switch (addr->sa_family) { 2850 #ifdef INET 2851 case AF_INET: 2852 { 2853 struct sockaddr_in *sin; 2854 2855 /* IPV6_V6ONLY socket? */ 2856 if (SCTP_IPV6_V6ONLY(inp)) { 2857 error = EINVAL; 2858 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2859 goto out; 2860 } 2861 if (addr->sa_len != sizeof(*sin)) { 2862 error = EINVAL; 2863 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2864 goto out; 2865 } 2866 2867 sin = (struct sockaddr_in *)addr; 2868 lport = sin->sin_port; 2869 /* 2870 * For LOOPBACK the prison_local_ip4() call 2871 * will transmute the ip address to the 2872 * proper value. 2873 */ 2874 if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) { 2875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2876 goto out; 2877 } 2878 if (sin->sin_addr.s_addr != INADDR_ANY) { 2879 bindall = 0; 2880 } 2881 break; 2882 } 2883 #endif 2884 #ifdef INET6 2885 case AF_INET6: 2886 { 2887 /* 2888 * Only for pure IPv6 Address. (No IPv4 2889 * Mapped!) 2890 */ 2891 struct sockaddr_in6 *sin6; 2892 2893 sin6 = (struct sockaddr_in6 *)addr; 2894 if (addr->sa_len != sizeof(*sin6)) { 2895 error = EINVAL; 2896 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2897 goto out; 2898 } 2899 lport = sin6->sin6_port; 2900 /* 2901 * For LOOPBACK the prison_local_ip6() call 2902 * will transmute the ipv6 address to the 2903 * proper value. 2904 */ 2905 if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr, 2906 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2907 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2908 goto out; 2909 } 2910 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2911 bindall = 0; 2912 /* KAME hack: embed scopeid */ 2913 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2914 error = EINVAL; 2915 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2916 goto out; 2917 } 2918 } 2919 /* this must be cleared for ifa_ifwithaddr() */ 2920 sin6->sin6_scope_id = 0; 2921 break; 2922 } 2923 #endif 2924 default: 2925 error = EAFNOSUPPORT; 2926 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2927 goto out; 2928 } 2929 } 2930 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2931 vrf_id = inp->def_vrf_id; 2932 2933 if (lport) { 2934 /* 2935 * Did the caller specify a port? if so we must see if an ep 2936 * already has this one bound. 2937 */ 2938 /* got to be root to get at low ports */ 2939 if (ntohs(lport) < IPPORT_RESERVED && 2940 (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 2941 goto out; 2942 } 2943 SCTP_INP_INCR_REF(inp); 2944 SCTP_INP_WUNLOCK(inp); 2945 if (bindall) { 2946 vrf_id = inp->def_vrf_id; 2947 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2948 if (inp_tmp != NULL) { 2949 /* 2950 * lock guy returned and lower count note 2951 * that we are not bound so inp_tmp should 2952 * NEVER be inp. And it is this inp 2953 * (inp_tmp) that gets the reference bump, 2954 * so we must lower it. 2955 */ 2956 SCTP_INP_DECR_REF(inp_tmp); 2957 /* unlock info */ 2958 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2959 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2960 /* 2961 * Ok, must be one-2-one and 2962 * allowing port re-use 2963 */ 2964 port_reuse_active = 1; 2965 goto continue_anyway; 2966 } 2967 SCTP_INP_WLOCK(inp); 2968 SCTP_INP_DECR_REF(inp); 2969 error = EADDRINUSE; 2970 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2971 goto out; 2972 } 2973 } else { 2974 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2975 if (inp_tmp != NULL) { 2976 /* 2977 * lock guy returned and lower count note 2978 * that we are not bound so inp_tmp should 2979 * NEVER be inp. And it is this inp 2980 * (inp_tmp) that gets the reference bump, 2981 * so we must lower it. 2982 */ 2983 SCTP_INP_DECR_REF(inp_tmp); 2984 /* unlock info */ 2985 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2986 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2987 /* 2988 * Ok, must be one-2-one and 2989 * allowing port re-use 2990 */ 2991 port_reuse_active = 1; 2992 goto continue_anyway; 2993 } 2994 SCTP_INP_WLOCK(inp); 2995 SCTP_INP_DECR_REF(inp); 2996 error = EADDRINUSE; 2997 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2998 goto out; 2999 } 3000 } 3001 continue_anyway: 3002 SCTP_INP_WLOCK(inp); 3003 SCTP_INP_DECR_REF(inp); 3004 if (bindall) { 3005 /* verify that no lport is not used by a singleton */ 3006 if ((port_reuse_active == 0) && 3007 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3008 /* Sorry someone already has this one bound */ 3009 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3010 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3011 port_reuse_active = 1; 3012 } else { 3013 error = EADDRINUSE; 3014 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3015 goto out; 3016 } 3017 } 3018 } 3019 } else { 3020 uint16_t first, last, candidate; 3021 uint16_t count; 3022 3023 if (ip_inp->inp_flags & INP_HIGHPORT) { 3024 first = MODULE_GLOBAL(ipport_hifirstauto); 3025 last = MODULE_GLOBAL(ipport_hilastauto); 3026 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3027 if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 3028 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3029 goto out; 3030 } 3031 first = MODULE_GLOBAL(ipport_lowfirstauto); 3032 last = MODULE_GLOBAL(ipport_lowlastauto); 3033 } else { 3034 first = MODULE_GLOBAL(ipport_firstauto); 3035 last = MODULE_GLOBAL(ipport_lastauto); 3036 } 3037 if (first > last) { 3038 uint16_t temp; 3039 3040 temp = first; 3041 first = last; 3042 last = temp; 3043 } 3044 count = last - first + 1; /* number of candidates */ 3045 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3046 3047 for (;;) { 3048 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3049 lport = htons(candidate); 3050 break; 3051 } 3052 if (--count == 0) { 3053 error = EADDRINUSE; 3054 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3055 goto out; 3056 } 3057 if (candidate == last) 3058 candidate = first; 3059 else 3060 candidate = candidate + 1; 3061 } 3062 } 3063 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3064 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3065 /* 3066 * this really should not happen. The guy did a non-blocking 3067 * bind and then did a close at the same time. 3068 */ 3069 error = EINVAL; 3070 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3071 goto out; 3072 } 3073 /* ok we look clear to give out this port, so lets setup the binding */ 3074 if (bindall) { 3075 /* binding to all addresses, so just set in the proper flags */ 3076 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3077 /* set the automatic addr changes from kernel flag */ 3078 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3079 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3080 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3081 } else { 3082 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3083 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3084 } 3085 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3086 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3087 } else { 3088 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3089 } 3090 /* 3091 * set the automatic mobility_base from kernel flag (by 3092 * micchie) 3093 */ 3094 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3095 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3096 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3097 } else { 3098 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3099 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3100 } 3101 /* 3102 * set the automatic mobility_fasthandoff from kernel flag 3103 * (by micchie) 3104 */ 3105 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3106 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3107 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3108 } else { 3109 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3110 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3111 } 3112 } else { 3113 /* 3114 * bind specific, make sure flags is off and add a new 3115 * address structure to the sctp_addr_list inside the ep 3116 * structure. 3117 * 3118 * We will need to allocate one and insert it at the head. 3119 * The socketopt call can just insert new addresses in there 3120 * as well. It will also have to do the embed scope kame 3121 * hack too (before adding). 3122 */ 3123 struct sctp_ifa *ifa; 3124 union sctp_sockstore store; 3125 3126 memset(&store, 0, sizeof(store)); 3127 switch (addr->sa_family) { 3128 #ifdef INET 3129 case AF_INET: 3130 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3131 store.sin.sin_port = 0; 3132 break; 3133 #endif 3134 #ifdef INET6 3135 case AF_INET6: 3136 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3137 store.sin6.sin6_port = 0; 3138 break; 3139 #endif 3140 default: 3141 break; 3142 } 3143 /* 3144 * first find the interface with the bound address need to 3145 * zero out the port to find the address! yuck! can't do 3146 * this earlier since need port for sctp_pcb_findep() 3147 */ 3148 if (sctp_ifap != NULL) { 3149 ifa = sctp_ifap; 3150 } else { 3151 /* 3152 * Note for BSD we hit here always other O/S's will 3153 * pass things in via the sctp_ifap argument. 3154 */ 3155 ifa = sctp_find_ifa_by_addr(&store.sa, 3156 vrf_id, SCTP_ADDR_NOT_LOCKED); 3157 } 3158 if (ifa == NULL) { 3159 error = EADDRNOTAVAIL; 3160 /* Can't find an interface with that address */ 3161 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3162 goto out; 3163 } 3164 #ifdef INET6 3165 if (addr->sa_family == AF_INET6) { 3166 /* GAK, more FIXME IFA lock? */ 3167 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3168 /* Can't bind a non-existent addr. */ 3169 error = EINVAL; 3170 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3171 goto out; 3172 } 3173 } 3174 #endif 3175 /* we're not bound all */ 3176 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3177 /* allow bindx() to send ASCONF's for binding changes */ 3178 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3179 /* clear automatic addr changes from kernel flag */ 3180 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3181 3182 /* add this address to the endpoint list */ 3183 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3184 if (error != 0) 3185 goto out; 3186 inp->laddr_count++; 3187 } 3188 /* find the bucket */ 3189 if (port_reuse_active) { 3190 /* Put it into tcp 1-2-1 hash */ 3191 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3192 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3193 } else { 3194 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3195 } 3196 /* put it in the bucket */ 3197 LIST_INSERT_HEAD(head, inp, sctp_hash); 3198 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3199 (void *)head, ntohs(lport), port_reuse_active); 3200 /* set in the port */ 3201 inp->sctp_lport = lport; 3202 3203 /* turn off just the unbound flag */ 3204 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0, 3205 ("%s: inp %p is already bound", __func__, inp)); 3206 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3207 out: 3208 return (error); 3209 } 3210 3211 int 3212 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 3213 struct sctp_ifa *sctp_ifap, struct thread *td) 3214 { 3215 struct sctp_inpcb *inp; 3216 int error; 3217 3218 inp = so->so_pcb; 3219 SCTP_INP_INFO_WLOCK(); 3220 SCTP_INP_WLOCK(inp); 3221 error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td); 3222 SCTP_INP_WUNLOCK(inp); 3223 SCTP_INP_INFO_WUNLOCK(); 3224 return (error); 3225 } 3226 3227 static void 3228 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3229 { 3230 struct sctp_iterator *it, *nit; 3231 3232 /* 3233 * We enter with the only the ITERATOR_LOCK in place and a write 3234 * lock on the inp_info stuff. 3235 */ 3236 it = sctp_it_ctl.cur_it; 3237 if (it && (it->vn != curvnet)) { 3238 /* Its not looking at our VNET */ 3239 return; 3240 } 3241 if (it && (it->inp == inp)) { 3242 /* 3243 * This is tricky and we hold the iterator lock, but when it 3244 * returns and gets the lock (when we release it) the 3245 * iterator will try to operate on inp. We need to stop that 3246 * from happening. But of course the iterator has a 3247 * reference on the stcb and inp. We can mark it and it will 3248 * stop. 3249 * 3250 * If its a single iterator situation, we set the end 3251 * iterator flag. Otherwise we set the iterator to go to the 3252 * next inp. 3253 * 3254 */ 3255 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3256 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3257 } else { 3258 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3259 } 3260 } 3261 /* 3262 * Now go through and remove any single reference to our inp that 3263 * may be still pending on the list 3264 */ 3265 SCTP_IPI_ITERATOR_WQ_LOCK(); 3266 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3267 if (it->vn != curvnet) { 3268 continue; 3269 } 3270 if (it->inp == inp) { 3271 /* This one points to me is it inp specific? */ 3272 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3273 /* Remove and free this one */ 3274 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3275 it, sctp_nxt_itr); 3276 if (it->function_atend != NULL) { 3277 (*it->function_atend) (it->pointer, it->val); 3278 } 3279 SCTP_FREE(it, SCTP_M_ITER); 3280 } else { 3281 it->inp = LIST_NEXT(it->inp, sctp_list); 3282 if (it->inp) { 3283 SCTP_INP_INCR_REF(it->inp); 3284 } 3285 } 3286 /* 3287 * When its put in the refcnt is incremented so decr 3288 * it 3289 */ 3290 SCTP_INP_DECR_REF(inp); 3291 } 3292 } 3293 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3294 } 3295 3296 /* release sctp_inpcb unbind the port */ 3297 void 3298 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3299 { 3300 /* 3301 * Here we free a endpoint. We must find it (if it is in the Hash 3302 * table) and remove it from there. Then we must also find it in the 3303 * overall list and remove it from there. After all removals are 3304 * complete then any timer has to be stopped. Then start the actual 3305 * freeing. a) Any local lists. b) Any associations. c) The hash of 3306 * all associations. d) finally the ep itself. 3307 */ 3308 struct sctp_tcb *asoc, *nasoc; 3309 struct sctp_laddr *laddr, *nladdr; 3310 struct inpcb *ip_pcb; 3311 struct socket *so; 3312 int being_refed = 0; 3313 struct sctp_queued_to_read *sq, *nsq; 3314 int cnt; 3315 sctp_sharedkey_t *shared_key, *nshared_key; 3316 3317 #ifdef SCTP_LOG_CLOSING 3318 sctp_log_closing(inp, NULL, 0); 3319 #endif 3320 SCTP_ITERATOR_LOCK(); 3321 /* mark any iterators on the list or being processed */ 3322 sctp_iterator_inp_being_freed(inp); 3323 SCTP_ITERATOR_UNLOCK(); 3324 3325 SCTP_ASOC_CREATE_LOCK(inp); 3326 SCTP_INP_INFO_WLOCK(); 3327 SCTP_INP_WLOCK(inp); 3328 so = inp->sctp_socket; 3329 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0, 3330 ("%s: inp %p still has socket", __func__, inp)); 3331 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0, 3332 ("%s: double free of inp %p", __func__, inp)); 3333 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3334 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3335 /* socket is gone, so no more wakeups allowed */ 3336 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3337 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3338 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3339 } 3340 /* First time through we have the socket lock, after that no more. */ 3341 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3342 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3343 3344 if (inp->control) { 3345 sctp_m_freem(inp->control); 3346 inp->control = NULL; 3347 } 3348 if (inp->pkt) { 3349 sctp_m_freem(inp->pkt); 3350 inp->pkt = NULL; 3351 } 3352 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3353 * here but I will be nice :> (i.e. 3354 * ip_pcb = ep;) */ 3355 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3356 int cnt_in_sd; 3357 3358 cnt_in_sd = 0; 3359 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3360 SCTP_TCB_LOCK(asoc); 3361 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3362 /* Skip guys being freed */ 3363 cnt_in_sd++; 3364 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3365 /* 3366 * Special case - we did not start a 3367 * kill timer on the asoc due to it 3368 * was not closed. So go ahead and 3369 * start it now. 3370 */ 3371 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3372 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3373 } 3374 SCTP_TCB_UNLOCK(asoc); 3375 continue; 3376 } 3377 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3378 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3379 (asoc->asoc.total_output_queue_size == 0)) { 3380 /* 3381 * If we have data in queue, we don't want 3382 * to just free since the app may have done, 3383 * send()/close or connect/send/close. And 3384 * it wants the data to get across first. 3385 */ 3386 /* Just abandon things in the front states */ 3387 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3388 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3389 cnt_in_sd++; 3390 } 3391 continue; 3392 } 3393 /* Disconnect the socket please */ 3394 asoc->sctp_socket = NULL; 3395 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3396 if ((asoc->asoc.size_on_reasm_queue > 0) || 3397 (asoc->asoc.control_pdapi) || 3398 (asoc->asoc.size_on_all_streams > 0) || 3399 (so && (so->so_rcv.sb_cc > 0))) { 3400 /* Left with Data unread */ 3401 struct mbuf *op_err; 3402 3403 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3404 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3405 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3406 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3407 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3408 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3409 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3410 } 3411 if (sctp_free_assoc(inp, asoc, 3412 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3413 cnt_in_sd++; 3414 } 3415 continue; 3416 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3417 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3418 (asoc->asoc.stream_queue_cnt == 0)) { 3419 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3420 goto abort_anyway; 3421 } 3422 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3423 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3424 struct sctp_nets *netp; 3425 3426 /* 3427 * there is nothing queued to send, 3428 * so I send shutdown 3429 */ 3430 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3431 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3432 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3433 } 3434 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3435 sctp_stop_timers_for_shutdown(asoc); 3436 if (asoc->asoc.alternate) { 3437 netp = asoc->asoc.alternate; 3438 } else { 3439 netp = asoc->asoc.primary_destination; 3440 } 3441 sctp_send_shutdown(asoc, netp); 3442 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3443 netp); 3444 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3445 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3446 } 3447 } else { 3448 /* mark into shutdown pending */ 3449 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3450 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3451 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3452 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3453 } 3454 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3455 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3456 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3457 struct mbuf *op_err; 3458 3459 abort_anyway: 3460 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3461 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3462 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3463 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3464 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3465 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3466 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3467 } 3468 if (sctp_free_assoc(inp, asoc, 3469 SCTP_PCBFREE_NOFORCE, 3470 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3471 cnt_in_sd++; 3472 } 3473 continue; 3474 } else { 3475 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3476 } 3477 } 3478 cnt_in_sd++; 3479 SCTP_TCB_UNLOCK(asoc); 3480 } 3481 /* now is there some left in our SHUTDOWN state? */ 3482 if (cnt_in_sd) { 3483 #ifdef SCTP_LOG_CLOSING 3484 sctp_log_closing(inp, NULL, 2); 3485 #endif 3486 inp->sctp_socket = NULL; 3487 SCTP_INP_WUNLOCK(inp); 3488 SCTP_ASOC_CREATE_UNLOCK(inp); 3489 SCTP_INP_INFO_WUNLOCK(); 3490 return; 3491 } 3492 } 3493 inp->sctp_socket = NULL; 3494 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3495 SCTP_PCB_FLAGS_UNBOUND) { 3496 /* 3497 * ok, this guy has been bound. It's port is somewhere in 3498 * the SCTP_BASE_INFO(hash table). Remove it! 3499 */ 3500 LIST_REMOVE(inp, sctp_hash); 3501 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3502 } 3503 3504 /* 3505 * If there is a timer running to kill us, forget it, since it may 3506 * have a contest on the INP lock.. which would cause us to die ... 3507 */ 3508 cnt = 0; 3509 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3510 SCTP_TCB_LOCK(asoc); 3511 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3512 /* Disconnect the socket please */ 3513 asoc->sctp_socket = NULL; 3514 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3515 } 3516 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3517 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3518 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3519 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3520 } 3521 cnt++; 3522 SCTP_TCB_UNLOCK(asoc); 3523 continue; 3524 } 3525 /* Free associations that are NOT killing us */ 3526 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3527 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3528 struct mbuf *op_err; 3529 3530 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3531 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3532 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3533 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3534 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3535 cnt++; 3536 SCTP_TCB_UNLOCK(asoc); 3537 continue; 3538 } 3539 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3540 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3541 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3542 } 3543 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3544 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3545 cnt++; 3546 } 3547 } 3548 if (cnt) { 3549 /* Ok we have someone out there that will kill us */ 3550 #ifdef SCTP_LOG_CLOSING 3551 sctp_log_closing(inp, NULL, 3); 3552 #endif 3553 SCTP_INP_WUNLOCK(inp); 3554 SCTP_ASOC_CREATE_UNLOCK(inp); 3555 SCTP_INP_INFO_WUNLOCK(); 3556 return; 3557 } 3558 if (SCTP_INP_LOCK_CONTENDED(inp)) 3559 being_refed++; 3560 if (SCTP_INP_READ_CONTENDED(inp)) 3561 being_refed++; 3562 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3563 being_refed++; 3564 /* NOTE: 0 refcount also means no timers are referencing us. */ 3565 if ((inp->refcount) || 3566 (being_refed) || 3567 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3568 #ifdef SCTP_LOG_CLOSING 3569 sctp_log_closing(inp, NULL, 4); 3570 #endif 3571 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3572 SCTP_INP_WUNLOCK(inp); 3573 SCTP_ASOC_CREATE_UNLOCK(inp); 3574 SCTP_INP_INFO_WUNLOCK(); 3575 return; 3576 } 3577 inp->sctp_ep.signature_change.type = 0; 3578 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3579 /* 3580 * Remove it from the list .. last thing we need a lock for. 3581 */ 3582 LIST_REMOVE(inp, sctp_list); 3583 SCTP_INP_WUNLOCK(inp); 3584 SCTP_ASOC_CREATE_UNLOCK(inp); 3585 SCTP_INP_INFO_WUNLOCK(); 3586 3587 #ifdef SCTP_LOG_CLOSING 3588 sctp_log_closing(inp, NULL, 5); 3589 #endif 3590 if ((inp->sctp_asocidhash) != NULL) { 3591 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3592 inp->sctp_asocidhash = NULL; 3593 } 3594 /* sa_ignore FREED_MEMORY */ 3595 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3596 /* Its only abandoned if it had data left */ 3597 if (sq->length) 3598 SCTP_STAT_INCR(sctps_left_abandon); 3599 3600 TAILQ_REMOVE(&inp->read_queue, sq, next); 3601 sctp_free_remote_addr(sq->whoFrom); 3602 if (so) 3603 so->so_rcv.sb_cc -= sq->length; 3604 if (sq->data) { 3605 sctp_m_freem(sq->data); 3606 sq->data = NULL; 3607 } 3608 /* 3609 * no need to free the net count, since at this point all 3610 * assoc's are gone. 3611 */ 3612 sctp_free_a_readq(NULL, sq); 3613 } 3614 /* Now the sctp_pcb things */ 3615 /* 3616 * free each asoc if it is not already closed/free. we can't use the 3617 * macro here since le_next will get freed as part of the 3618 * sctp_free_assoc() call. 3619 */ 3620 if (ip_pcb->inp_options) { 3621 (void)sctp_m_free(ip_pcb->inp_options); 3622 ip_pcb->inp_options = 0; 3623 } 3624 #ifdef INET6 3625 if (ip_pcb->inp_vflag & INP_IPV6) { 3626 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3627 } 3628 #endif /* INET6 */ 3629 ip_pcb->inp_vflag = 0; 3630 /* free up authentication fields */ 3631 if (inp->sctp_ep.local_auth_chunks != NULL) 3632 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3633 if (inp->sctp_ep.local_hmacs != NULL) 3634 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3635 3636 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3637 LIST_REMOVE(shared_key, next); 3638 sctp_free_sharedkey(shared_key); 3639 /* sa_ignore FREED_MEMORY */ 3640 } 3641 3642 /* 3643 * if we have an address list the following will free the list of 3644 * ifaddr's that are set into this ep. Again macro limitations here, 3645 * since the LIST_FOREACH could be a bad idea. 3646 */ 3647 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3648 sctp_remove_laddr(laddr); 3649 } 3650 3651 #ifdef SCTP_TRACK_FREED_ASOCS 3652 /* TEMP CODE */ 3653 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3654 LIST_REMOVE(asoc, sctp_tcblist); 3655 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3656 SCTP_DECR_ASOC_COUNT(); 3657 } 3658 /* *** END TEMP CODE *** */ 3659 #endif 3660 /* Now lets see about freeing the EP hash table. */ 3661 if (inp->sctp_tcbhash != NULL) { 3662 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3663 inp->sctp_tcbhash = NULL; 3664 } 3665 /* Now we must put the ep memory back into the zone pool */ 3666 crfree(inp->ip_inp.inp.inp_cred); 3667 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3668 SCTP_INP_LOCK_DESTROY(inp); 3669 SCTP_INP_READ_DESTROY(inp); 3670 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3671 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3672 SCTP_DECR_EP_COUNT(); 3673 } 3674 3675 struct sctp_nets * 3676 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3677 { 3678 struct sctp_nets *net; 3679 3680 /* locate the address */ 3681 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3682 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3683 return (net); 3684 } 3685 return (NULL); 3686 } 3687 3688 int 3689 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3690 { 3691 struct sctp_ifa *sctp_ifa; 3692 3693 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3694 if (sctp_ifa) { 3695 return (1); 3696 } else { 3697 return (0); 3698 } 3699 } 3700 3701 /* 3702 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3703 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3704 * stats of stuff. 3705 */ 3706 int 3707 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3708 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3709 { 3710 /* 3711 * The following is redundant to the same lines in the 3712 * sctp_aloc_assoc() but is needed since others call the add address 3713 * function 3714 */ 3715 struct sctp_nets *net, *netfirst; 3716 int addr_inscope; 3717 3718 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3719 from); 3720 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3721 3722 netfirst = sctp_findnet(stcb, newaddr); 3723 if (netfirst) { 3724 /* 3725 * Lie and return ok, we don't want to make the association 3726 * go away for this behavior. It will happen in the TCP 3727 * model in a connected socket. It does not reach the hash 3728 * table until after the association is built so it can't be 3729 * found. Mark as reachable, since the initial creation will 3730 * have been cleared and the NOT_IN_ASSOC flag will have 3731 * been added... and we don't want to end up removing it 3732 * back out. 3733 */ 3734 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3735 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3736 SCTP_ADDR_UNCONFIRMED); 3737 } else { 3738 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3739 } 3740 3741 return (0); 3742 } 3743 addr_inscope = 1; 3744 switch (newaddr->sa_family) { 3745 #ifdef INET 3746 case AF_INET: 3747 { 3748 struct sockaddr_in *sin; 3749 3750 sin = (struct sockaddr_in *)newaddr; 3751 if (sin->sin_addr.s_addr == 0) { 3752 /* Invalid address */ 3753 return (-1); 3754 } 3755 /* zero out the zero area */ 3756 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3757 3758 /* assure len is set */ 3759 sin->sin_len = sizeof(struct sockaddr_in); 3760 if (set_scope) { 3761 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3762 stcb->asoc.scope.ipv4_local_scope = 1; 3763 } 3764 } else { 3765 /* Validate the address is in scope */ 3766 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3767 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3768 addr_inscope = 0; 3769 } 3770 } 3771 break; 3772 } 3773 #endif 3774 #ifdef INET6 3775 case AF_INET6: 3776 { 3777 struct sockaddr_in6 *sin6; 3778 3779 sin6 = (struct sockaddr_in6 *)newaddr; 3780 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3781 /* Invalid address */ 3782 return (-1); 3783 } 3784 /* assure len is set */ 3785 sin6->sin6_len = sizeof(struct sockaddr_in6); 3786 if (set_scope) { 3787 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3788 stcb->asoc.scope.loopback_scope = 1; 3789 stcb->asoc.scope.local_scope = 0; 3790 stcb->asoc.scope.ipv4_local_scope = 1; 3791 stcb->asoc.scope.site_scope = 1; 3792 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3793 /* 3794 * If the new destination is a 3795 * LINK_LOCAL we must have common 3796 * site scope. Don't set the local 3797 * scope since we may not share all 3798 * links, only loopback can do this. 3799 * Links on the local network would 3800 * also be on our private network 3801 * for v4 too. 3802 */ 3803 stcb->asoc.scope.ipv4_local_scope = 1; 3804 stcb->asoc.scope.site_scope = 1; 3805 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3806 /* 3807 * If the new destination is 3808 * SITE_LOCAL then we must have site 3809 * scope in common. 3810 */ 3811 stcb->asoc.scope.site_scope = 1; 3812 } 3813 } else { 3814 /* Validate the address is in scope */ 3815 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3816 (stcb->asoc.scope.loopback_scope == 0)) { 3817 addr_inscope = 0; 3818 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3819 (stcb->asoc.scope.local_scope == 0)) { 3820 addr_inscope = 0; 3821 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3822 (stcb->asoc.scope.site_scope == 0)) { 3823 addr_inscope = 0; 3824 } 3825 } 3826 break; 3827 } 3828 #endif 3829 default: 3830 /* not supported family type */ 3831 return (-1); 3832 } 3833 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3834 if (net == NULL) { 3835 return (-1); 3836 } 3837 SCTP_INCR_RADDR_COUNT(); 3838 memset(net, 0, sizeof(struct sctp_nets)); 3839 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3840 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3841 switch (newaddr->sa_family) { 3842 #ifdef INET 3843 case AF_INET: 3844 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3845 break; 3846 #endif 3847 #ifdef INET6 3848 case AF_INET6: 3849 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3850 break; 3851 #endif 3852 default: 3853 break; 3854 } 3855 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3856 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3857 stcb->asoc.scope.loopback_scope = 1; 3858 stcb->asoc.scope.ipv4_local_scope = 1; 3859 stcb->asoc.scope.local_scope = 0; 3860 stcb->asoc.scope.site_scope = 1; 3861 addr_inscope = 1; 3862 } 3863 net->failure_threshold = stcb->asoc.def_net_failure; 3864 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3865 if (addr_inscope == 0) { 3866 net->dest_state = (SCTP_ADDR_REACHABLE | 3867 SCTP_ADDR_OUT_OF_SCOPE); 3868 } else { 3869 if (from == SCTP_ADDR_IS_CONFIRMED) 3870 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3871 net->dest_state = SCTP_ADDR_REACHABLE; 3872 else 3873 net->dest_state = SCTP_ADDR_REACHABLE | 3874 SCTP_ADDR_UNCONFIRMED; 3875 } 3876 /* 3877 * We set this to 0, the timer code knows that this means its an 3878 * initial value 3879 */ 3880 net->rto_needed = 1; 3881 net->RTO = 0; 3882 net->RTO_measured = 0; 3883 stcb->asoc.numnets++; 3884 net->ref_count = 1; 3885 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3886 net->port = port; 3887 net->dscp = stcb->asoc.default_dscp; 3888 #ifdef INET6 3889 net->flowlabel = stcb->asoc.default_flowlabel; 3890 #endif 3891 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3892 net->dest_state |= SCTP_ADDR_NOHB; 3893 } else { 3894 net->dest_state &= ~SCTP_ADDR_NOHB; 3895 } 3896 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3897 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3898 } else { 3899 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3900 } 3901 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3902 /* Init the timer structure */ 3903 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3904 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3905 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3906 3907 /* Now generate a route for this guy */ 3908 #ifdef INET6 3909 /* KAME hack: embed scopeid */ 3910 if (newaddr->sa_family == AF_INET6) { 3911 struct sockaddr_in6 *sin6; 3912 3913 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3914 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3915 sin6->sin6_scope_id = 0; 3916 } 3917 #endif 3918 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3919 stcb->asoc.vrf_id, 3920 stcb->sctp_ep->fibnum); 3921 3922 net->src_addr_selected = 0; 3923 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3924 /* Get source address */ 3925 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3926 stcb, 3927 (sctp_route_t *)&net->ro, 3928 net, 3929 0, 3930 stcb->asoc.vrf_id); 3931 if (stcb->asoc.default_mtu > 0) { 3932 net->mtu = stcb->asoc.default_mtu; 3933 switch (net->ro._l_addr.sa.sa_family) { 3934 #ifdef INET 3935 case AF_INET: 3936 net->mtu += SCTP_MIN_V4_OVERHEAD; 3937 break; 3938 #endif 3939 #ifdef INET6 3940 case AF_INET6: 3941 net->mtu += SCTP_MIN_OVERHEAD; 3942 break; 3943 #endif 3944 default: 3945 break; 3946 } 3947 #if defined(INET) || defined(INET6) 3948 if (net->port) { 3949 net->mtu += (uint32_t)sizeof(struct udphdr); 3950 } 3951 #endif 3952 } else if (net->ro._s_addr != NULL) { 3953 uint32_t imtu, rmtu, hcmtu; 3954 3955 net->src_addr_selected = 1; 3956 /* Now get the interface MTU */ 3957 if (net->ro._s_addr->ifn_p != NULL) { 3958 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3959 } else { 3960 imtu = 0; 3961 } 3962 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 3963 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3964 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3965 } 3966 } 3967 if (net->mtu == 0) { 3968 if (stcb->asoc.default_mtu > 0) { 3969 net->mtu = stcb->asoc.default_mtu; 3970 switch (net->ro._l_addr.sa.sa_family) { 3971 #ifdef INET 3972 case AF_INET: 3973 net->mtu += SCTP_MIN_V4_OVERHEAD; 3974 break; 3975 #endif 3976 #ifdef INET6 3977 case AF_INET6: 3978 net->mtu += SCTP_MIN_OVERHEAD; 3979 break; 3980 #endif 3981 default: 3982 break; 3983 } 3984 #if defined(INET) || defined(INET6) 3985 if (net->port) { 3986 net->mtu += (uint32_t)sizeof(struct udphdr); 3987 } 3988 #endif 3989 } else { 3990 switch (newaddr->sa_family) { 3991 #ifdef INET 3992 case AF_INET: 3993 net->mtu = SCTP_DEFAULT_MTU; 3994 break; 3995 #endif 3996 #ifdef INET6 3997 case AF_INET6: 3998 net->mtu = 1280; 3999 break; 4000 #endif 4001 default: 4002 break; 4003 } 4004 } 4005 } 4006 #if defined(INET) || defined(INET6) 4007 if (net->port) { 4008 net->mtu -= (uint32_t)sizeof(struct udphdr); 4009 } 4010 #endif 4011 if (from == SCTP_ALLOC_ASOC) { 4012 stcb->asoc.smallest_mtu = net->mtu; 4013 } 4014 if (stcb->asoc.smallest_mtu > net->mtu) { 4015 sctp_pathmtu_adjustment(stcb, net->mtu); 4016 } 4017 #ifdef INET6 4018 if (newaddr->sa_family == AF_INET6) { 4019 struct sockaddr_in6 *sin6; 4020 4021 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4022 (void)sa6_recoverscope(sin6); 4023 } 4024 #endif 4025 4026 /* JRS - Use the congestion control given in the CC module */ 4027 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4028 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4029 4030 /* 4031 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4032 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4033 */ 4034 net->find_pseudo_cumack = 1; 4035 net->find_rtx_pseudo_cumack = 1; 4036 /* Choose an initial flowid. */ 4037 net->flowid = stcb->asoc.my_vtag ^ 4038 ntohs(stcb->rport) ^ 4039 ntohs(stcb->sctp_ep->sctp_lport); 4040 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4041 if (netp) { 4042 *netp = net; 4043 } 4044 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4045 if (net->ro.ro_nh == NULL) { 4046 /* Since we have no route put it at the back */ 4047 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4048 } else if (netfirst == NULL) { 4049 /* We are the first one in the pool. */ 4050 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4051 } else if (netfirst->ro.ro_nh == NULL) { 4052 /* 4053 * First one has NO route. Place this one ahead of the first 4054 * one. 4055 */ 4056 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4057 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4058 /* 4059 * This one has a different interface than the one at the 4060 * top of the list. Place it ahead. 4061 */ 4062 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4063 } else { 4064 /* 4065 * Ok we have the same interface as the first one. Move 4066 * forward until we find either a) one with a NULL route... 4067 * insert ahead of that b) one with a different ifp.. insert 4068 * after that. c) end of the list.. insert at the tail. 4069 */ 4070 struct sctp_nets *netlook; 4071 4072 do { 4073 netlook = TAILQ_NEXT(netfirst, sctp_next); 4074 if (netlook == NULL) { 4075 /* End of the list */ 4076 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4077 break; 4078 } else if (netlook->ro.ro_nh == NULL) { 4079 /* next one has NO route */ 4080 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4081 break; 4082 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4083 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4084 net, sctp_next); 4085 break; 4086 } 4087 /* Shift forward */ 4088 netfirst = netlook; 4089 } while (netlook != NULL); 4090 } 4091 4092 /* got to have a primary set */ 4093 if (stcb->asoc.primary_destination == 0) { 4094 stcb->asoc.primary_destination = net; 4095 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4096 (net->ro.ro_nh) && 4097 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4098 /* No route to current primary adopt new primary */ 4099 stcb->asoc.primary_destination = net; 4100 } 4101 /* Validate primary is first */ 4102 net = TAILQ_FIRST(&stcb->asoc.nets); 4103 if ((net != stcb->asoc.primary_destination) && 4104 (stcb->asoc.primary_destination)) { 4105 /* 4106 * first one on the list is NOT the primary sctp_cmpaddr() 4107 * is much more efficient if the primary is the first on the 4108 * list, make it so. 4109 */ 4110 TAILQ_REMOVE(&stcb->asoc.nets, 4111 stcb->asoc.primary_destination, sctp_next); 4112 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4113 stcb->asoc.primary_destination, sctp_next); 4114 } 4115 return (0); 4116 } 4117 4118 static uint32_t 4119 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4120 { 4121 uint32_t id; 4122 struct sctpasochead *head; 4123 struct sctp_tcb *lstcb; 4124 4125 try_again: 4126 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4127 /* TSNH */ 4128 return (0); 4129 } 4130 /* 4131 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4132 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4133 */ 4134 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4135 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4136 } 4137 id = inp->sctp_associd_counter; 4138 inp->sctp_associd_counter++; 4139 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4140 if (lstcb) { 4141 goto try_again; 4142 } 4143 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4144 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4145 stcb->asoc.in_asocid_hash = 1; 4146 return (id); 4147 } 4148 4149 /* 4150 * allocate an association and add it to the endpoint. The caller must be 4151 * careful to add all additional addresses once they are know right away or 4152 * else the assoc will be may experience a blackout scenario. 4153 */ 4154 struct sctp_tcb * 4155 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4156 int *error, uint32_t override_tag, uint32_t initial_tsn, 4157 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4158 struct thread *p, 4159 int initialize_auth_params) 4160 { 4161 /* note the p argument is only valid in unbound sockets */ 4162 4163 struct sctp_tcb *stcb; 4164 struct sctp_association *asoc; 4165 struct sctpasochead *head; 4166 uint16_t rport; 4167 int err; 4168 4169 /* 4170 * Assumption made here: Caller has done a 4171 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4172 * address does not exist already. 4173 */ 4174 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4175 /* Hit max assoc, sorry no more */ 4176 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4177 *error = ENOBUFS; 4178 return (NULL); 4179 } 4180 if (firstaddr == NULL) { 4181 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4182 *error = EINVAL; 4183 return (NULL); 4184 } 4185 SCTP_INP_RLOCK(inp); 4186 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4187 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4188 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4189 /* 4190 * If its in the TCP pool, its NOT allowed to create an 4191 * association. The parent listener needs to call 4192 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4193 * off, or connected one does this.. its an error. 4194 */ 4195 SCTP_INP_RUNLOCK(inp); 4196 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4197 *error = EINVAL; 4198 return (NULL); 4199 } 4200 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4201 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4202 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4203 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4204 SCTP_INP_RUNLOCK(inp); 4205 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4206 *error = EINVAL; 4207 return (NULL); 4208 } 4209 } 4210 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4211 #ifdef SCTP_DEBUG 4212 if (firstaddr) { 4213 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4214 switch (firstaddr->sa_family) { 4215 #ifdef INET 4216 case AF_INET: 4217 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4218 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4219 break; 4220 #endif 4221 #ifdef INET6 4222 case AF_INET6: 4223 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4224 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4225 break; 4226 #endif 4227 default: 4228 break; 4229 } 4230 } else { 4231 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4232 } 4233 #endif /* SCTP_DEBUG */ 4234 switch (firstaddr->sa_family) { 4235 #ifdef INET 4236 case AF_INET: 4237 { 4238 struct sockaddr_in *sin; 4239 4240 sin = (struct sockaddr_in *)firstaddr; 4241 if ((ntohs(sin->sin_port) == 0) || 4242 (sin->sin_addr.s_addr == INADDR_ANY) || 4243 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4244 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) || 4245 (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) != 0) && 4246 (SCTP_IPV6_V6ONLY(inp) != 0))) { 4247 /* Invalid address */ 4248 SCTP_INP_RUNLOCK(inp); 4249 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4250 *error = EINVAL; 4251 return (NULL); 4252 } 4253 rport = sin->sin_port; 4254 break; 4255 } 4256 #endif 4257 #ifdef INET6 4258 case AF_INET6: 4259 { 4260 struct sockaddr_in6 *sin6; 4261 4262 sin6 = (struct sockaddr_in6 *)firstaddr; 4263 if ((ntohs(sin6->sin6_port) == 0) || 4264 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4265 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) || 4266 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) { 4267 /* Invalid address */ 4268 SCTP_INP_RUNLOCK(inp); 4269 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4270 *error = EINVAL; 4271 return (NULL); 4272 } 4273 rport = sin6->sin6_port; 4274 break; 4275 } 4276 #endif 4277 default: 4278 /* not supported family type */ 4279 SCTP_INP_RUNLOCK(inp); 4280 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4281 *error = EINVAL; 4282 return (NULL); 4283 } 4284 SCTP_INP_RUNLOCK(inp); 4285 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4286 /* 4287 * If you have not performed a bind, then we need to do the 4288 * ephemeral bind for you. 4289 */ 4290 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) { 4291 /* bind error, probably perm */ 4292 *error = err; 4293 return (NULL); 4294 } 4295 } 4296 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4297 if (stcb == NULL) { 4298 /* out of memory? */ 4299 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4300 *error = ENOMEM; 4301 return (NULL); 4302 } 4303 SCTP_INCR_ASOC_COUNT(); 4304 4305 memset(stcb, 0, sizeof(*stcb)); 4306 asoc = &stcb->asoc; 4307 4308 SCTP_TCB_LOCK_INIT(stcb); 4309 SCTP_TCB_SEND_LOCK_INIT(stcb); 4310 stcb->rport = rport; 4311 /* setup back pointer's */ 4312 stcb->sctp_ep = inp; 4313 stcb->sctp_socket = inp->sctp_socket; 4314 if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) { 4315 /* failed */ 4316 SCTP_TCB_LOCK_DESTROY(stcb); 4317 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4318 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4319 SCTP_DECR_ASOC_COUNT(); 4320 *error = err; 4321 return (NULL); 4322 } 4323 /* and the port */ 4324 SCTP_INP_INFO_WLOCK(); 4325 SCTP_INP_WLOCK(inp); 4326 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4327 /* inpcb freed while alloc going on */ 4328 SCTP_TCB_LOCK_DESTROY(stcb); 4329 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4330 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4331 SCTP_INP_WUNLOCK(inp); 4332 SCTP_INP_INFO_WUNLOCK(); 4333 SCTP_DECR_ASOC_COUNT(); 4334 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4335 *error = EINVAL; 4336 return (NULL); 4337 } 4338 SCTP_TCB_LOCK(stcb); 4339 4340 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4341 /* now that my_vtag is set, add it to the hash */ 4342 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4343 /* put it in the bucket in the vtag hash of assoc's for the system */ 4344 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4345 SCTP_INP_INFO_WUNLOCK(); 4346 4347 if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) { 4348 /* failure.. memory error? */ 4349 if (asoc->strmout) { 4350 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4351 asoc->strmout = NULL; 4352 } 4353 if (asoc->mapping_array) { 4354 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4355 asoc->mapping_array = NULL; 4356 } 4357 if (asoc->nr_mapping_array) { 4358 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4359 asoc->nr_mapping_array = NULL; 4360 } 4361 SCTP_DECR_ASOC_COUNT(); 4362 SCTP_TCB_UNLOCK(stcb); 4363 SCTP_TCB_LOCK_DESTROY(stcb); 4364 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4365 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4366 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4367 SCTP_INP_WUNLOCK(inp); 4368 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4369 *error = ENOBUFS; 4370 return (NULL); 4371 } 4372 /* Init all the timers */ 4373 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4374 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4375 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4376 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4377 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4378 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4379 4380 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4381 /* now file the port under the hash as well */ 4382 if (inp->sctp_tcbhash != NULL) { 4383 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4384 inp->sctp_hashmark)]; 4385 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4386 } 4387 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4388 sctp_initialize_auth_params(inp, stcb); 4389 } 4390 SCTP_INP_WUNLOCK(inp); 4391 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4392 return (stcb); 4393 } 4394 4395 void 4396 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4397 { 4398 struct sctp_inpcb *inp; 4399 struct sctp_association *asoc; 4400 4401 inp = stcb->sctp_ep; 4402 asoc = &stcb->asoc; 4403 asoc->numnets--; 4404 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4405 if (net == asoc->primary_destination) { 4406 /* Reset primary */ 4407 struct sctp_nets *lnet; 4408 4409 lnet = TAILQ_FIRST(&asoc->nets); 4410 /* 4411 * Mobility adaptation Ideally, if deleted destination is 4412 * the primary, it becomes a fast retransmission trigger by 4413 * the subsequent SET PRIMARY. (by micchie) 4414 */ 4415 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4416 SCTP_MOBILITY_BASE) || 4417 sctp_is_mobility_feature_on(stcb->sctp_ep, 4418 SCTP_MOBILITY_FASTHANDOFF)) { 4419 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4420 if (asoc->deleted_primary != NULL) { 4421 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4422 goto out; 4423 } 4424 asoc->deleted_primary = net; 4425 atomic_add_int(&net->ref_count, 1); 4426 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4427 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4428 sctp_mobility_feature_on(stcb->sctp_ep, 4429 SCTP_MOBILITY_PRIM_DELETED); 4430 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4431 stcb->sctp_ep, stcb, NULL); 4432 } 4433 out: 4434 /* Try to find a confirmed primary */ 4435 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4436 } 4437 if (net == asoc->last_data_chunk_from) { 4438 /* Reset primary */ 4439 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4440 } 4441 if (net == asoc->last_control_chunk_from) { 4442 /* Clear net */ 4443 asoc->last_control_chunk_from = NULL; 4444 } 4445 if (net == asoc->last_net_cmt_send_started) { 4446 /* Clear net */ 4447 asoc->last_net_cmt_send_started = NULL; 4448 } 4449 if (net == stcb->asoc.alternate) { 4450 sctp_free_remote_addr(stcb->asoc.alternate); 4451 stcb->asoc.alternate = NULL; 4452 } 4453 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4454 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4455 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4456 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4457 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4458 sctp_free_remote_addr(net); 4459 } 4460 4461 /* 4462 * remove a remote endpoint address from an association, it will fail if the 4463 * address does not exist. 4464 */ 4465 int 4466 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4467 { 4468 /* 4469 * Here we need to remove a remote address. This is quite simple, we 4470 * first find it in the list of address for the association 4471 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4472 * on that item. Note we do not allow it to be removed if there are 4473 * no other addresses. 4474 */ 4475 struct sctp_association *asoc; 4476 struct sctp_nets *net, *nnet; 4477 4478 asoc = &stcb->asoc; 4479 4480 /* locate the address */ 4481 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4482 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4483 continue; 4484 } 4485 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4486 remaddr)) { 4487 /* we found the guy */ 4488 if (asoc->numnets < 2) { 4489 /* Must have at LEAST two remote addresses */ 4490 return (-1); 4491 } else { 4492 sctp_remove_net(stcb, net); 4493 return (0); 4494 } 4495 } 4496 } 4497 /* not found. */ 4498 return (-2); 4499 } 4500 4501 void 4502 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4503 { 4504 struct sctpvtaghead *chain; 4505 struct sctp_tagblock *twait_block; 4506 int found = 0; 4507 int i; 4508 4509 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4510 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4511 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4512 if ((twait_block->vtag_block[i].v_tag == tag) && 4513 (twait_block->vtag_block[i].lport == lport) && 4514 (twait_block->vtag_block[i].rport == rport)) { 4515 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4516 twait_block->vtag_block[i].v_tag = 0; 4517 twait_block->vtag_block[i].lport = 0; 4518 twait_block->vtag_block[i].rport = 0; 4519 found = 1; 4520 break; 4521 } 4522 } 4523 if (found) 4524 break; 4525 } 4526 } 4527 4528 int 4529 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4530 { 4531 struct sctpvtaghead *chain; 4532 struct sctp_tagblock *twait_block; 4533 int found = 0; 4534 int i; 4535 4536 SCTP_INP_INFO_WLOCK(); 4537 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4538 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4539 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4540 if ((twait_block->vtag_block[i].v_tag == tag) && 4541 (twait_block->vtag_block[i].lport == lport) && 4542 (twait_block->vtag_block[i].rport == rport)) { 4543 found = 1; 4544 break; 4545 } 4546 } 4547 if (found) 4548 break; 4549 } 4550 SCTP_INP_INFO_WUNLOCK(); 4551 return (found); 4552 } 4553 4554 void 4555 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4556 { 4557 struct sctpvtaghead *chain; 4558 struct sctp_tagblock *twait_block; 4559 struct timeval now; 4560 int set, i; 4561 4562 if (time == 0) { 4563 /* Its disabled */ 4564 return; 4565 } 4566 (void)SCTP_GETTIME_TIMEVAL(&now); 4567 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4568 set = 0; 4569 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4570 /* Block(s) present, lets find space, and expire on the fly */ 4571 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4572 if ((twait_block->vtag_block[i].v_tag == 0) && 4573 !set) { 4574 twait_block->vtag_block[i].tv_sec_at_expire = 4575 now.tv_sec + time; 4576 twait_block->vtag_block[i].v_tag = tag; 4577 twait_block->vtag_block[i].lport = lport; 4578 twait_block->vtag_block[i].rport = rport; 4579 set = 1; 4580 } else if ((twait_block->vtag_block[i].v_tag) && 4581 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4582 /* Audit expires this guy */ 4583 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4584 twait_block->vtag_block[i].v_tag = 0; 4585 twait_block->vtag_block[i].lport = 0; 4586 twait_block->vtag_block[i].rport = 0; 4587 if (set == 0) { 4588 /* Reuse it for my new tag */ 4589 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4590 twait_block->vtag_block[i].v_tag = tag; 4591 twait_block->vtag_block[i].lport = lport; 4592 twait_block->vtag_block[i].rport = rport; 4593 set = 1; 4594 } 4595 } 4596 } 4597 if (set) { 4598 /* 4599 * We only do up to the block where we can place our 4600 * tag for audits 4601 */ 4602 break; 4603 } 4604 } 4605 /* Need to add a new block to chain */ 4606 if (!set) { 4607 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4608 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4609 if (twait_block == NULL) { 4610 return; 4611 } 4612 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4613 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4614 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4615 twait_block->vtag_block[0].v_tag = tag; 4616 twait_block->vtag_block[0].lport = lport; 4617 twait_block->vtag_block[0].rport = rport; 4618 } 4619 } 4620 4621 void 4622 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4623 { 4624 struct sctp_tmit_chunk *chk, *nchk; 4625 struct sctp_queued_to_read *control, *ncontrol; 4626 4627 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4628 TAILQ_REMOVE(rh, control, next_instrm); 4629 control->on_strm_q = 0; 4630 if (control->on_read_q == 0) { 4631 sctp_free_remote_addr(control->whoFrom); 4632 if (control->data) { 4633 sctp_m_freem(control->data); 4634 control->data = NULL; 4635 } 4636 } 4637 /* Reassembly free? */ 4638 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4639 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4640 if (chk->data) { 4641 sctp_m_freem(chk->data); 4642 chk->data = NULL; 4643 } 4644 if (chk->holds_key_ref) 4645 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4646 sctp_free_remote_addr(chk->whoTo); 4647 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4648 SCTP_DECR_CHK_COUNT(); 4649 /* sa_ignore FREED_MEMORY */ 4650 } 4651 /* 4652 * We don't free the address here since all the net's were 4653 * freed above. 4654 */ 4655 if (control->on_read_q == 0) { 4656 sctp_free_a_readq(stcb, control); 4657 } 4658 } 4659 } 4660 4661 /*- 4662 * Free the association after un-hashing the remote port. This 4663 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4664 * expect that the input to this function IS a locked TCB. 4665 * It will return 0, if it did NOT destroy the association (instead 4666 * it unlocks it. It will return NON-zero if it either destroyed the 4667 * association OR the association is already destroyed. 4668 */ 4669 int 4670 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4671 { 4672 int i; 4673 struct sctp_association *asoc; 4674 struct sctp_nets *net, *nnet; 4675 struct sctp_laddr *laddr, *naddr; 4676 struct sctp_tmit_chunk *chk, *nchk; 4677 struct sctp_asconf_addr *aparam, *naparam; 4678 struct sctp_asconf_ack *aack, *naack; 4679 struct sctp_stream_reset_list *strrst, *nstrrst; 4680 struct sctp_queued_to_read *sq, *nsq; 4681 struct sctp_stream_queue_pending *sp, *nsp; 4682 sctp_sharedkey_t *shared_key, *nshared_key; 4683 struct socket *so; 4684 4685 /* first, lets purge the entry from the hash table. */ 4686 4687 #ifdef SCTP_LOG_CLOSING 4688 sctp_log_closing(inp, stcb, 6); 4689 #endif 4690 if (stcb->asoc.state == 0) { 4691 #ifdef SCTP_LOG_CLOSING 4692 sctp_log_closing(inp, NULL, 7); 4693 #endif 4694 /* there is no asoc, really TSNH :-0 */ 4695 return (1); 4696 } 4697 SCTP_TCB_SEND_LOCK(stcb); 4698 if (stcb->asoc.alternate) { 4699 sctp_free_remote_addr(stcb->asoc.alternate); 4700 stcb->asoc.alternate = NULL; 4701 } 4702 /* TEMP CODE */ 4703 if (stcb->freed_from_where == 0) { 4704 /* Only record the first place free happened from */ 4705 stcb->freed_from_where = from_location; 4706 } 4707 /* TEMP CODE */ 4708 4709 asoc = &stcb->asoc; 4710 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4711 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4712 /* nothing around */ 4713 so = NULL; 4714 else 4715 so = inp->sctp_socket; 4716 4717 /* 4718 * We used timer based freeing if a reader or writer is in the way. 4719 * So we first check if we are actually being called from a timer, 4720 * if so we abort early if a reader or writer is still in the way. 4721 */ 4722 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4723 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4724 /* 4725 * is it the timer driving us? if so are the reader/writers 4726 * gone? 4727 */ 4728 if (stcb->asoc.refcnt) { 4729 /* nope, reader or writer in the way */ 4730 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4731 /* no asoc destroyed */ 4732 SCTP_TCB_SEND_UNLOCK(stcb); 4733 SCTP_TCB_UNLOCK(stcb); 4734 #ifdef SCTP_LOG_CLOSING 4735 sctp_log_closing(inp, stcb, 8); 4736 #endif 4737 return (0); 4738 } 4739 } 4740 /* Now clean up any other timers */ 4741 sctp_stop_association_timers(stcb, false); 4742 /* Now the read queue needs to be cleaned up (only once) */ 4743 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4744 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4745 SCTP_INP_READ_LOCK(inp); 4746 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4747 if (sq->stcb == stcb) { 4748 sq->do_not_ref_stcb = 1; 4749 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4750 /* 4751 * If there is no end, there never will be 4752 * now. 4753 */ 4754 if (sq->end_added == 0) { 4755 /* Held for PD-API clear that. */ 4756 sq->pdapi_aborted = 1; 4757 sq->held_length = 0; 4758 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4759 /* 4760 * Need to add a PD-API 4761 * aborted indication. 4762 * Setting the control_pdapi 4763 * assures that it will be 4764 * added right after this 4765 * msg. 4766 */ 4767 uint32_t strseq; 4768 4769 stcb->asoc.control_pdapi = sq; 4770 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4771 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4772 stcb, 4773 SCTP_PARTIAL_DELIVERY_ABORTED, 4774 (void *)&strseq, 4775 SCTP_SO_LOCKED); 4776 stcb->asoc.control_pdapi = NULL; 4777 } 4778 } 4779 /* Add an end to wake them */ 4780 sq->end_added = 1; 4781 } 4782 } 4783 SCTP_INP_READ_UNLOCK(inp); 4784 if (stcb->block_entry) { 4785 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4786 stcb->block_entry->error = ECONNRESET; 4787 stcb->block_entry = NULL; 4788 } 4789 } 4790 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4791 /* 4792 * Someone holds a reference OR the socket is unaccepted 4793 * yet. 4794 */ 4795 if ((stcb->asoc.refcnt) || 4796 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4797 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4798 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4799 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4800 } 4801 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4802 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4803 /* nothing around */ 4804 so = NULL; 4805 if (so) { 4806 /* Wake any reader/writers */ 4807 sctp_sorwakeup(inp, so); 4808 sctp_sowwakeup(inp, so); 4809 } 4810 SCTP_TCB_SEND_UNLOCK(stcb); 4811 SCTP_TCB_UNLOCK(stcb); 4812 4813 #ifdef SCTP_LOG_CLOSING 4814 sctp_log_closing(inp, stcb, 9); 4815 #endif 4816 /* no asoc destroyed */ 4817 return (0); 4818 } 4819 #ifdef SCTP_LOG_CLOSING 4820 sctp_log_closing(inp, stcb, 10); 4821 #endif 4822 /* 4823 * When I reach here, no others want to kill the assoc yet.. and I 4824 * own the lock. Now its possible an abort comes in when I do the 4825 * lock exchange below to grab all the locks to do the final take 4826 * out. to prevent this we increment the count, which will start a 4827 * timer and blow out above thus assuring us that we hold exclusive 4828 * killing of the asoc. Note that after getting back the TCB lock we 4829 * will go ahead and increment the counter back up and stop any 4830 * timer a passing stranger may have started :-S 4831 */ 4832 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4833 atomic_add_int(&stcb->asoc.refcnt, 1); 4834 4835 SCTP_TCB_SEND_UNLOCK(stcb); 4836 SCTP_TCB_UNLOCK(stcb); 4837 SCTP_INP_INFO_WLOCK(); 4838 SCTP_INP_WLOCK(inp); 4839 SCTP_TCB_LOCK(stcb); 4840 SCTP_TCB_SEND_LOCK(stcb); 4841 } 4842 /* Double check the GONE flag */ 4843 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4844 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4845 /* nothing around */ 4846 so = NULL; 4847 4848 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4849 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4850 /* 4851 * For TCP type we need special handling when we are 4852 * connected. We also include the peel'ed off ones to. 4853 */ 4854 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4855 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4856 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4857 if (so) { 4858 SOCKBUF_LOCK(&so->so_rcv); 4859 so->so_state &= ~(SS_ISCONNECTING | 4860 SS_ISDISCONNECTING | 4861 SS_ISCONFIRMING | 4862 SS_ISCONNECTED); 4863 so->so_state |= SS_ISDISCONNECTED; 4864 socantrcvmore_locked(so); 4865 socantsendmore(so); 4866 sctp_sowwakeup(inp, so); 4867 sctp_sorwakeup(inp, so); 4868 SCTP_SOWAKEUP(so); 4869 } 4870 } 4871 } 4872 4873 /* 4874 * Make it invalid too, that way if its about to run it will abort 4875 * and return. 4876 */ 4877 /* re-increment the lock */ 4878 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4879 atomic_add_int(&stcb->asoc.refcnt, -1); 4880 } 4881 if (stcb->asoc.refcnt) { 4882 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4883 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4884 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4885 SCTP_INP_INFO_WUNLOCK(); 4886 SCTP_INP_WUNLOCK(inp); 4887 } 4888 SCTP_TCB_SEND_UNLOCK(stcb); 4889 SCTP_TCB_UNLOCK(stcb); 4890 return (0); 4891 } 4892 asoc->state = 0; 4893 if (inp->sctp_tcbhash) { 4894 LIST_REMOVE(stcb, sctp_tcbhash); 4895 } 4896 if (stcb->asoc.in_asocid_hash) { 4897 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4898 } 4899 if (inp->sctp_socket == NULL) { 4900 stcb->sctp_socket = NULL; 4901 } 4902 /* Now lets remove it from the list of ALL associations in the EP */ 4903 LIST_REMOVE(stcb, sctp_tcblist); 4904 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4905 SCTP_INP_INCR_REF(inp); 4906 SCTP_INP_WUNLOCK(inp); 4907 } 4908 /* pull from vtag hash */ 4909 LIST_REMOVE(stcb, sctp_asocs); 4910 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4911 inp->sctp_lport, stcb->rport); 4912 4913 /* 4914 * Now restop the timers to be sure this is paranoia at is finest! 4915 */ 4916 sctp_stop_association_timers(stcb, true); 4917 4918 /* 4919 * The chunk lists and such SHOULD be empty but we check them just 4920 * in case. 4921 */ 4922 /* anything on the wheel needs to be removed */ 4923 for (i = 0; i < asoc->streamoutcnt; i++) { 4924 struct sctp_stream_out *outs; 4925 4926 outs = &asoc->strmout[i]; 4927 /* now clean up any chunks here */ 4928 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4929 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4930 TAILQ_REMOVE(&outs->outqueue, sp, next); 4931 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1); 4932 sctp_free_spbufspace(stcb, asoc, sp); 4933 if (sp->data) { 4934 if (so) { 4935 /* Still an open socket - report */ 4936 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4937 0, (void *)sp, SCTP_SO_LOCKED); 4938 } 4939 if (sp->data) { 4940 sctp_m_freem(sp->data); 4941 sp->data = NULL; 4942 sp->tail_mbuf = NULL; 4943 sp->length = 0; 4944 } 4945 } 4946 if (sp->net) { 4947 sctp_free_remote_addr(sp->net); 4948 sp->net = NULL; 4949 } 4950 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4951 } 4952 } 4953 /* sa_ignore FREED_MEMORY */ 4954 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4955 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4956 SCTP_FREE(strrst, SCTP_M_STRESET); 4957 } 4958 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4959 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4960 if (sq->data) { 4961 sctp_m_freem(sq->data); 4962 sq->data = NULL; 4963 } 4964 sctp_free_remote_addr(sq->whoFrom); 4965 sq->whoFrom = NULL; 4966 sq->stcb = NULL; 4967 /* Free the ctl entry */ 4968 sctp_free_a_readq(stcb, sq); 4969 /* sa_ignore FREED_MEMORY */ 4970 } 4971 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4972 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4973 if (chk->data) { 4974 sctp_m_freem(chk->data); 4975 chk->data = NULL; 4976 } 4977 if (chk->holds_key_ref) 4978 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4979 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4980 SCTP_DECR_CHK_COUNT(); 4981 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4982 asoc->free_chunk_cnt--; 4983 /* sa_ignore FREED_MEMORY */ 4984 } 4985 /* pending send queue SHOULD be empty */ 4986 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4987 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 4988 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 4989 #ifdef INVARIANTS 4990 } else { 4991 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 4992 #endif 4993 } 4994 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4995 if (chk->data) { 4996 if (so) { 4997 /* Still a socket? */ 4998 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4999 0, chk, SCTP_SO_LOCKED); 5000 } 5001 if (chk->data) { 5002 sctp_m_freem(chk->data); 5003 chk->data = NULL; 5004 } 5005 } 5006 if (chk->holds_key_ref) 5007 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5008 if (chk->whoTo) { 5009 sctp_free_remote_addr(chk->whoTo); 5010 chk->whoTo = NULL; 5011 } 5012 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5013 SCTP_DECR_CHK_COUNT(); 5014 /* sa_ignore FREED_MEMORY */ 5015 } 5016 /* sent queue SHOULD be empty */ 5017 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5018 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5019 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5020 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5021 #ifdef INVARIANTS 5022 } else { 5023 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5024 #endif 5025 } 5026 } 5027 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5028 if (chk->data) { 5029 if (so) { 5030 /* Still a socket? */ 5031 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5032 0, chk, SCTP_SO_LOCKED); 5033 } 5034 if (chk->data) { 5035 sctp_m_freem(chk->data); 5036 chk->data = NULL; 5037 } 5038 } 5039 if (chk->holds_key_ref) 5040 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5041 sctp_free_remote_addr(chk->whoTo); 5042 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5043 SCTP_DECR_CHK_COUNT(); 5044 /* sa_ignore FREED_MEMORY */ 5045 } 5046 #ifdef INVARIANTS 5047 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5048 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5049 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5050 } 5051 } 5052 #endif 5053 /* control queue MAY not be empty */ 5054 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5055 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5056 if (chk->data) { 5057 sctp_m_freem(chk->data); 5058 chk->data = NULL; 5059 } 5060 if (chk->holds_key_ref) 5061 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5062 sctp_free_remote_addr(chk->whoTo); 5063 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5064 SCTP_DECR_CHK_COUNT(); 5065 /* sa_ignore FREED_MEMORY */ 5066 } 5067 /* ASCONF queue MAY not be empty */ 5068 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5069 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5070 if (chk->data) { 5071 sctp_m_freem(chk->data); 5072 chk->data = NULL; 5073 } 5074 if (chk->holds_key_ref) 5075 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5076 sctp_free_remote_addr(chk->whoTo); 5077 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5078 SCTP_DECR_CHK_COUNT(); 5079 /* sa_ignore FREED_MEMORY */ 5080 } 5081 if (asoc->mapping_array) { 5082 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5083 asoc->mapping_array = NULL; 5084 } 5085 if (asoc->nr_mapping_array) { 5086 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5087 asoc->nr_mapping_array = NULL; 5088 } 5089 /* the stream outs */ 5090 if (asoc->strmout) { 5091 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5092 asoc->strmout = NULL; 5093 } 5094 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5095 if (asoc->strmin) { 5096 for (i = 0; i < asoc->streamincnt; i++) { 5097 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5098 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5099 } 5100 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5101 asoc->strmin = NULL; 5102 } 5103 asoc->streamincnt = 0; 5104 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5105 #ifdef INVARIANTS 5106 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5107 panic("no net's left alloc'ed, or list points to itself"); 5108 } 5109 #endif 5110 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5111 sctp_free_remote_addr(net); 5112 } 5113 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5114 /* sa_ignore FREED_MEMORY */ 5115 sctp_remove_laddr(laddr); 5116 } 5117 5118 /* pending asconf (address) parameters */ 5119 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5120 /* sa_ignore FREED_MEMORY */ 5121 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5122 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5123 } 5124 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5125 /* sa_ignore FREED_MEMORY */ 5126 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5127 if (aack->data != NULL) { 5128 sctp_m_freem(aack->data); 5129 } 5130 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5131 } 5132 /* clean up auth stuff */ 5133 if (asoc->local_hmacs) 5134 sctp_free_hmaclist(asoc->local_hmacs); 5135 if (asoc->peer_hmacs) 5136 sctp_free_hmaclist(asoc->peer_hmacs); 5137 5138 if (asoc->local_auth_chunks) 5139 sctp_free_chunklist(asoc->local_auth_chunks); 5140 if (asoc->peer_auth_chunks) 5141 sctp_free_chunklist(asoc->peer_auth_chunks); 5142 5143 sctp_free_authinfo(&asoc->authinfo); 5144 5145 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5146 LIST_REMOVE(shared_key, next); 5147 sctp_free_sharedkey(shared_key); 5148 /* sa_ignore FREED_MEMORY */ 5149 } 5150 5151 /* Insert new items here :> */ 5152 5153 /* Get rid of LOCK */ 5154 SCTP_TCB_SEND_UNLOCK(stcb); 5155 SCTP_TCB_UNLOCK(stcb); 5156 SCTP_TCB_LOCK_DESTROY(stcb); 5157 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5158 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5159 SCTP_INP_INFO_WUNLOCK(); 5160 SCTP_INP_RLOCK(inp); 5161 } 5162 #ifdef SCTP_TRACK_FREED_ASOCS 5163 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5164 /* now clean up the tasoc itself */ 5165 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5166 SCTP_DECR_ASOC_COUNT(); 5167 } else { 5168 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5169 } 5170 #else 5171 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5172 SCTP_DECR_ASOC_COUNT(); 5173 #endif 5174 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5175 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5176 /* 5177 * If its NOT the inp_free calling us AND sctp_close 5178 * as been called, we call back... 5179 */ 5180 SCTP_INP_RUNLOCK(inp); 5181 /* 5182 * This will start the kill timer (if we are the 5183 * last one) since we hold an increment yet. But 5184 * this is the only safe way to do this since 5185 * otherwise if the socket closes at the same time 5186 * we are here we might collide in the cleanup. 5187 */ 5188 sctp_inpcb_free(inp, 5189 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5190 SCTP_CALLED_DIRECTLY_NOCMPSET); 5191 SCTP_INP_DECR_REF(inp); 5192 } else { 5193 /* The socket is still open. */ 5194 SCTP_INP_DECR_REF(inp); 5195 SCTP_INP_RUNLOCK(inp); 5196 } 5197 } 5198 /* destroyed the asoc */ 5199 #ifdef SCTP_LOG_CLOSING 5200 sctp_log_closing(inp, NULL, 11); 5201 #endif 5202 return (1); 5203 } 5204 5205 /* 5206 * determine if a destination is "reachable" based upon the addresses bound 5207 * to the current endpoint (e.g. only v4 or v6 currently bound) 5208 */ 5209 /* 5210 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5211 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5212 * types bound as its endpoint 5213 */ 5214 int 5215 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5216 { 5217 struct sctp_inpcb *inp; 5218 int answer; 5219 5220 /* 5221 * No locks here, the TCB, in all cases is already locked and an 5222 * assoc is up. There is either a INP lock by the caller applied (in 5223 * asconf case when deleting an address) or NOT in the HB case, 5224 * however if HB then the INP increment is up and the INP will not 5225 * be removed (on top of the fact that we have a TCB lock). So we 5226 * only want to read the sctp_flags, which is either bound-all or 5227 * not.. no protection needed since once an assoc is up you can't be 5228 * changing your binding. 5229 */ 5230 inp = stcb->sctp_ep; 5231 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5232 /* if bound all, destination is not restricted */ 5233 /* 5234 * RRS: Question during lock work: Is this correct? If you 5235 * are bound-all you still might need to obey the V4--V6 5236 * flags??? IMO this bound-all stuff needs to be removed! 5237 */ 5238 return (1); 5239 } 5240 /* NOTE: all "scope" checks are done when local addresses are added */ 5241 switch (destaddr->sa_family) { 5242 #ifdef INET6 5243 case AF_INET6: 5244 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5245 break; 5246 #endif 5247 #ifdef INET 5248 case AF_INET: 5249 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5250 break; 5251 #endif 5252 default: 5253 /* invalid family, so it's unreachable */ 5254 answer = 0; 5255 break; 5256 } 5257 return (answer); 5258 } 5259 5260 /* 5261 * update the inp_vflags on an endpoint 5262 */ 5263 static void 5264 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5265 { 5266 struct sctp_laddr *laddr; 5267 5268 /* first clear the flag */ 5269 inp->ip_inp.inp.inp_vflag = 0; 5270 /* set the flag based on addresses on the ep list */ 5271 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5272 if (laddr->ifa == NULL) { 5273 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5274 __func__); 5275 continue; 5276 } 5277 5278 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5279 continue; 5280 } 5281 switch (laddr->ifa->address.sa.sa_family) { 5282 #ifdef INET6 5283 case AF_INET6: 5284 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5285 break; 5286 #endif 5287 #ifdef INET 5288 case AF_INET: 5289 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5290 break; 5291 #endif 5292 default: 5293 break; 5294 } 5295 } 5296 } 5297 5298 /* 5299 * Add the address to the endpoint local address list There is nothing to be 5300 * done if we are bound to all addresses 5301 */ 5302 void 5303 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5304 { 5305 struct sctp_laddr *laddr; 5306 struct sctp_tcb *stcb; 5307 int fnd, error = 0; 5308 5309 fnd = 0; 5310 5311 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5312 /* You are already bound to all. You have it already */ 5313 return; 5314 } 5315 #ifdef INET6 5316 if (ifa->address.sa.sa_family == AF_INET6) { 5317 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5318 /* Can't bind a non-useable addr. */ 5319 return; 5320 } 5321 } 5322 #endif 5323 /* first, is it already present? */ 5324 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5325 if (laddr->ifa == ifa) { 5326 fnd = 1; 5327 break; 5328 } 5329 } 5330 5331 if (fnd == 0) { 5332 /* Not in the ep list */ 5333 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5334 if (error != 0) 5335 return; 5336 inp->laddr_count++; 5337 /* update inp_vflag flags */ 5338 switch (ifa->address.sa.sa_family) { 5339 #ifdef INET6 5340 case AF_INET6: 5341 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5342 break; 5343 #endif 5344 #ifdef INET 5345 case AF_INET: 5346 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5347 break; 5348 #endif 5349 default: 5350 break; 5351 } 5352 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5353 sctp_add_local_addr_restricted(stcb, ifa); 5354 } 5355 } 5356 return; 5357 } 5358 5359 /* 5360 * select a new (hopefully reachable) destination net (should only be used 5361 * when we deleted an ep addr that is the only usable source address to reach 5362 * the destination net) 5363 */ 5364 static void 5365 sctp_select_primary_destination(struct sctp_tcb *stcb) 5366 { 5367 struct sctp_nets *net; 5368 5369 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5370 /* for now, we'll just pick the first reachable one we find */ 5371 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5372 continue; 5373 if (sctp_destination_is_reachable(stcb, 5374 (struct sockaddr *)&net->ro._l_addr)) { 5375 /* found a reachable destination */ 5376 stcb->asoc.primary_destination = net; 5377 } 5378 } 5379 /* I can't there from here! ...we're gonna die shortly... */ 5380 } 5381 5382 /* 5383 * Delete the address from the endpoint local address list. There is nothing 5384 * to be done if we are bound to all addresses 5385 */ 5386 void 5387 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5388 { 5389 struct sctp_laddr *laddr; 5390 int fnd; 5391 5392 fnd = 0; 5393 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5394 /* You are already bound to all. You have it already */ 5395 return; 5396 } 5397 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5398 if (laddr->ifa == ifa) { 5399 fnd = 1; 5400 break; 5401 } 5402 } 5403 if (fnd && (inp->laddr_count < 2)) { 5404 /* can't delete unless there are at LEAST 2 addresses */ 5405 return; 5406 } 5407 if (fnd) { 5408 /* 5409 * clean up any use of this address go through our 5410 * associations and clear any last_used_address that match 5411 * this one for each assoc, see if a new primary_destination 5412 * is needed 5413 */ 5414 struct sctp_tcb *stcb; 5415 5416 /* clean up "next_addr_touse" */ 5417 if (inp->next_addr_touse == laddr) 5418 /* delete this address */ 5419 inp->next_addr_touse = NULL; 5420 5421 /* clean up "last_used_address" */ 5422 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5423 struct sctp_nets *net; 5424 5425 SCTP_TCB_LOCK(stcb); 5426 if (stcb->asoc.last_used_address == laddr) 5427 /* delete this address */ 5428 stcb->asoc.last_used_address = NULL; 5429 /* 5430 * Now spin through all the nets and purge any ref 5431 * to laddr 5432 */ 5433 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5434 if (net->ro._s_addr == laddr->ifa) { 5435 /* Yep, purge src address selected */ 5436 RO_NHFREE(&net->ro); 5437 sctp_free_ifa(net->ro._s_addr); 5438 net->ro._s_addr = NULL; 5439 net->src_addr_selected = 0; 5440 } 5441 } 5442 SCTP_TCB_UNLOCK(stcb); 5443 } /* for each tcb */ 5444 /* remove it from the ep list */ 5445 sctp_remove_laddr(laddr); 5446 inp->laddr_count--; 5447 /* update inp_vflag flags */ 5448 sctp_update_ep_vflag(inp); 5449 } 5450 return; 5451 } 5452 5453 /* 5454 * Add the address to the TCB local address restricted list. 5455 * This is a "pending" address list (eg. addresses waiting for an 5456 * ASCONF-ACK response) and cannot be used as a valid source address. 5457 */ 5458 void 5459 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5460 { 5461 struct sctp_laddr *laddr; 5462 struct sctpladdr *list; 5463 5464 /* 5465 * Assumes TCB is locked.. and possibly the INP. May need to 5466 * confirm/fix that if we need it and is not the case. 5467 */ 5468 list = &stcb->asoc.sctp_restricted_addrs; 5469 5470 #ifdef INET6 5471 if (ifa->address.sa.sa_family == AF_INET6) { 5472 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5473 /* Can't bind a non-existent addr. */ 5474 return; 5475 } 5476 } 5477 #endif 5478 /* does the address already exist? */ 5479 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5480 if (laddr->ifa == ifa) { 5481 return; 5482 } 5483 } 5484 5485 /* add to the list */ 5486 (void)sctp_insert_laddr(list, ifa, 0); 5487 return; 5488 } 5489 5490 /* 5491 * Remove a local address from the TCB local address restricted list 5492 */ 5493 void 5494 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5495 { 5496 struct sctp_inpcb *inp; 5497 struct sctp_laddr *laddr; 5498 5499 /* 5500 * This is called by asconf work. It is assumed that a) The TCB is 5501 * locked and b) The INP is locked. This is true in as much as I can 5502 * trace through the entry asconf code where I did these locks. 5503 * Again, the ASCONF code is a bit different in that it does lock 5504 * the INP during its work often times. This must be since we don't 5505 * want other proc's looking up things while what they are looking 5506 * up is changing :-D 5507 */ 5508 5509 inp = stcb->sctp_ep; 5510 /* if subset bound and don't allow ASCONF's, can't delete last */ 5511 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5512 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5513 if (stcb->sctp_ep->laddr_count < 2) { 5514 /* can't delete last address */ 5515 return; 5516 } 5517 } 5518 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5519 /* remove the address if it exists */ 5520 if (laddr->ifa == NULL) 5521 continue; 5522 if (laddr->ifa == ifa) { 5523 sctp_remove_laddr(laddr); 5524 return; 5525 } 5526 } 5527 5528 /* address not found! */ 5529 return; 5530 } 5531 5532 /* sysctl */ 5533 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5534 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5535 5536 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5537 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5538 int *sctp_cpuarry = NULL; 5539 5540 void 5541 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5542 { 5543 /* Queue a packet to a processor for the specified core */ 5544 struct sctp_mcore_queue *qent; 5545 struct sctp_mcore_ctrl *wkq; 5546 int need_wake = 0; 5547 5548 if (sctp_mcore_workers == NULL) { 5549 /* Something went way bad during setup */ 5550 sctp_input_with_port(m, off, 0); 5551 return; 5552 } 5553 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5554 (sizeof(struct sctp_mcore_queue)), 5555 SCTP_M_MCORE); 5556 if (qent == NULL) { 5557 /* This is trouble */ 5558 sctp_input_with_port(m, off, 0); 5559 return; 5560 } 5561 qent->vn = curvnet; 5562 qent->m = m; 5563 qent->off = off; 5564 qent->v6 = 0; 5565 wkq = &sctp_mcore_workers[cpu_to_use]; 5566 SCTP_MCORE_QLOCK(wkq); 5567 5568 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5569 if (wkq->running == 0) { 5570 need_wake = 1; 5571 } 5572 SCTP_MCORE_QUNLOCK(wkq); 5573 if (need_wake) { 5574 wakeup(&wkq->running); 5575 } 5576 } 5577 5578 static void 5579 sctp_mcore_thread(void *arg) 5580 { 5581 5582 struct sctp_mcore_ctrl *wkq; 5583 struct sctp_mcore_queue *qent; 5584 5585 wkq = (struct sctp_mcore_ctrl *)arg; 5586 struct mbuf *m; 5587 int off, v6; 5588 5589 /* Wait for first tickle */ 5590 SCTP_MCORE_LOCK(wkq); 5591 wkq->running = 0; 5592 msleep(&wkq->running, 5593 &wkq->core_mtx, 5594 0, "wait for pkt", 0); 5595 SCTP_MCORE_UNLOCK(wkq); 5596 5597 /* Bind to our cpu */ 5598 thread_lock(curthread); 5599 sched_bind(curthread, wkq->cpuid); 5600 thread_unlock(curthread); 5601 5602 /* Now lets start working */ 5603 SCTP_MCORE_LOCK(wkq); 5604 /* Now grab lock and go */ 5605 for (;;) { 5606 SCTP_MCORE_QLOCK(wkq); 5607 skip_sleep: 5608 wkq->running = 1; 5609 qent = TAILQ_FIRST(&wkq->que); 5610 if (qent) { 5611 TAILQ_REMOVE(&wkq->que, qent, next); 5612 SCTP_MCORE_QUNLOCK(wkq); 5613 CURVNET_SET(qent->vn); 5614 m = qent->m; 5615 off = qent->off; 5616 v6 = qent->v6; 5617 SCTP_FREE(qent, SCTP_M_MCORE); 5618 if (v6 == 0) { 5619 sctp_input_with_port(m, off, 0); 5620 } else { 5621 SCTP_PRINTF("V6 not yet supported\n"); 5622 sctp_m_freem(m); 5623 } 5624 CURVNET_RESTORE(); 5625 SCTP_MCORE_QLOCK(wkq); 5626 } 5627 wkq->running = 0; 5628 if (!TAILQ_EMPTY(&wkq->que)) { 5629 goto skip_sleep; 5630 } 5631 SCTP_MCORE_QUNLOCK(wkq); 5632 msleep(&wkq->running, 5633 &wkq->core_mtx, 5634 0, "wait for pkt", 0); 5635 } 5636 } 5637 5638 static void 5639 sctp_startup_mcore_threads(void) 5640 { 5641 int i, cpu; 5642 5643 if (mp_ncpus == 1) 5644 return; 5645 5646 if (sctp_mcore_workers != NULL) { 5647 /* 5648 * Already been here in some previous vnet? 5649 */ 5650 return; 5651 } 5652 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5653 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5654 SCTP_M_MCORE); 5655 if (sctp_mcore_workers == NULL) { 5656 /* TSNH I hope */ 5657 return; 5658 } 5659 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5660 sizeof(struct sctp_mcore_ctrl))); 5661 /* Init the structures */ 5662 for (i = 0; i <= mp_maxid; i++) { 5663 TAILQ_INIT(&sctp_mcore_workers[i].que); 5664 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5665 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5666 sctp_mcore_workers[i].cpuid = i; 5667 } 5668 if (sctp_cpuarry == NULL) { 5669 SCTP_MALLOC(sctp_cpuarry, int *, 5670 (mp_ncpus * sizeof(int)), 5671 SCTP_M_MCORE); 5672 i = 0; 5673 CPU_FOREACH(cpu) { 5674 sctp_cpuarry[i] = cpu; 5675 i++; 5676 } 5677 } 5678 /* Now start them all */ 5679 CPU_FOREACH(cpu) { 5680 (void)kproc_create(sctp_mcore_thread, 5681 (void *)&sctp_mcore_workers[cpu], 5682 &sctp_mcore_workers[cpu].thread_proc, 5683 0, 5684 SCTP_KTHREAD_PAGES, 5685 SCTP_MCORE_NAME); 5686 } 5687 } 5688 #endif 5689 5690 void 5691 sctp_pcb_init(void) 5692 { 5693 /* 5694 * SCTP initialization for the PCB structures should be called by 5695 * the sctp_init() function. 5696 */ 5697 int i; 5698 struct timeval tv; 5699 5700 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5701 /* error I was called twice */ 5702 return; 5703 } 5704 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5705 5706 #if defined(SCTP_LOCAL_TRACE_BUF) 5707 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5708 #endif 5709 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5710 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5711 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5712 SCTP_M_MCORE); 5713 #endif 5714 (void)SCTP_GETTIME_TIMEVAL(&tv); 5715 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5716 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5717 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5718 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5719 #else 5720 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5721 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5722 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5723 #endif 5724 /* init the empty list of (All) Endpoints */ 5725 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5726 5727 /* init the hash table of endpoints */ 5728 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5729 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5730 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5731 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5732 &SCTP_BASE_INFO(hashasocmark)); 5733 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5734 &SCTP_BASE_INFO(hashmark)); 5735 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5736 &SCTP_BASE_INFO(hashtcpmark)); 5737 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5738 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5739 &SCTP_BASE_INFO(hashvrfmark)); 5740 5741 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5742 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5743 /* init the zones */ 5744 /* 5745 * FIX ME: Should check for NULL returns, but if it does fail we are 5746 * doomed to panic anyways... add later maybe. 5747 */ 5748 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5749 sizeof(struct sctp_inpcb), maxsockets); 5750 5751 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5752 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5753 5754 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5755 sizeof(struct sctp_laddr), 5756 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5757 5758 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5759 sizeof(struct sctp_nets), 5760 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5761 5762 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5763 sizeof(struct sctp_tmit_chunk), 5764 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5765 5766 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5767 sizeof(struct sctp_queued_to_read), 5768 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5769 5770 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5771 sizeof(struct sctp_stream_queue_pending), 5772 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5773 5774 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5775 sizeof(struct sctp_asconf), 5776 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5777 5778 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5779 sizeof(struct sctp_asconf_ack), 5780 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5781 5782 /* Master Lock INIT for info structure */ 5783 SCTP_INP_INFO_LOCK_INIT(); 5784 SCTP_STATLOG_INIT_LOCK(); 5785 5786 SCTP_IPI_COUNT_INIT(); 5787 SCTP_IPI_ADDR_INIT(); 5788 #ifdef SCTP_PACKET_LOGGING 5789 SCTP_IP_PKTLOG_INIT(); 5790 #endif 5791 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5792 5793 SCTP_WQ_ADDR_INIT(); 5794 /* not sure if we need all the counts */ 5795 SCTP_BASE_INFO(ipi_count_ep) = 0; 5796 /* assoc/tcb zone info */ 5797 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5798 /* local addrlist zone info */ 5799 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5800 /* remote addrlist zone info */ 5801 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5802 /* chunk info */ 5803 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5804 5805 /* socket queue zone info */ 5806 SCTP_BASE_INFO(ipi_count_readq) = 0; 5807 5808 /* stream out queue cont */ 5809 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5810 5811 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5812 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5813 5814 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5815 5816 /* Init the TIMEWAIT list */ 5817 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5818 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5819 } 5820 sctp_startup_iterator(); 5821 5822 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5823 sctp_startup_mcore_threads(); 5824 #endif 5825 5826 /* 5827 * INIT the default VRF which for BSD is the only one, other O/S's 5828 * may have more. But initially they must start with one and then 5829 * add the VRF's as addresses are added. 5830 */ 5831 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5832 } 5833 5834 /* 5835 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5836 */ 5837 void 5838 sctp_pcb_finish(void) 5839 { 5840 struct sctp_vrflist *vrf_bucket; 5841 struct sctp_vrf *vrf, *nvrf; 5842 struct sctp_ifn *ifn, *nifn; 5843 struct sctp_ifa *ifa, *nifa; 5844 struct sctpvtaghead *chain; 5845 struct sctp_tagblock *twait_block, *prev_twait_block; 5846 struct sctp_laddr *wi, *nwi; 5847 int i; 5848 struct sctp_iterator *it, *nit; 5849 5850 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5851 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5852 return; 5853 } 5854 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5855 /* 5856 * In FreeBSD the iterator thread never exits but we do clean up. 5857 * The only way FreeBSD reaches here is if we have VRF's but we 5858 * still add the ifdef to make it compile on old versions. 5859 */ 5860 retry: 5861 SCTP_IPI_ITERATOR_WQ_LOCK(); 5862 /* 5863 * sctp_iterator_worker() might be working on an it entry without 5864 * holding the lock. We won't find it on the list either and 5865 * continue and free/destroy it. While holding the lock, spin, to 5866 * avoid the race condition as sctp_iterator_worker() will have to 5867 * wait to re-acquire the lock. 5868 */ 5869 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5870 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5871 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5872 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5873 DELAY(10); 5874 goto retry; 5875 } 5876 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5877 if (it->vn != curvnet) { 5878 continue; 5879 } 5880 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5881 if (it->function_atend != NULL) { 5882 (*it->function_atend) (it->pointer, it->val); 5883 } 5884 SCTP_FREE(it, SCTP_M_ITER); 5885 } 5886 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5887 SCTP_ITERATOR_LOCK(); 5888 if ((sctp_it_ctl.cur_it) && 5889 (sctp_it_ctl.cur_it->vn == curvnet)) { 5890 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5891 } 5892 SCTP_ITERATOR_UNLOCK(); 5893 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5894 SCTP_WQ_ADDR_LOCK(); 5895 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5896 LIST_REMOVE(wi, sctp_nxt_addr); 5897 SCTP_DECR_LADDR_COUNT(); 5898 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5899 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5900 } 5901 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5902 } 5903 SCTP_WQ_ADDR_UNLOCK(); 5904 5905 /* 5906 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5907 * destroyed first). 5908 */ 5909 SCTP_IPI_ADDR_WLOCK(); 5910 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5911 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5912 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5913 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5914 /* free the ifa */ 5915 LIST_REMOVE(ifa, next_bucket); 5916 LIST_REMOVE(ifa, next_ifa); 5917 SCTP_FREE(ifa, SCTP_M_IFA); 5918 } 5919 /* free the ifn */ 5920 LIST_REMOVE(ifn, next_bucket); 5921 LIST_REMOVE(ifn, next_ifn); 5922 SCTP_FREE(ifn, SCTP_M_IFN); 5923 } 5924 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5925 /* free the vrf */ 5926 LIST_REMOVE(vrf, next_vrf); 5927 SCTP_FREE(vrf, SCTP_M_VRF); 5928 } 5929 SCTP_IPI_ADDR_WUNLOCK(); 5930 /* free the vrf hashes */ 5931 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5932 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5933 5934 /* 5935 * free the TIMEWAIT list elements malloc'd in the function 5936 * sctp_add_vtag_to_timewait()... 5937 */ 5938 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5939 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5940 if (!LIST_EMPTY(chain)) { 5941 prev_twait_block = NULL; 5942 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5943 if (prev_twait_block) { 5944 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5945 } 5946 prev_twait_block = twait_block; 5947 } 5948 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5949 } 5950 } 5951 5952 /* free the locks and mutexes */ 5953 #ifdef SCTP_PACKET_LOGGING 5954 SCTP_IP_PKTLOG_DESTROY(); 5955 #endif 5956 SCTP_IPI_ADDR_DESTROY(); 5957 SCTP_STATLOG_DESTROY(); 5958 SCTP_INP_INFO_LOCK_DESTROY(); 5959 5960 SCTP_WQ_ADDR_DESTROY(); 5961 5962 /* Get rid of other stuff too. */ 5963 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5964 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5965 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5966 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5967 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5968 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5969 5970 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5971 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5972 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5973 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5974 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5975 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5976 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5977 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5978 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5979 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5980 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5981 #endif 5982 } 5983 5984 int 5985 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5986 int offset, int limit, 5987 struct sockaddr *src, struct sockaddr *dst, 5988 struct sockaddr *altsa, uint16_t port) 5989 { 5990 /* 5991 * grub through the INIT pulling addresses and loading them to the 5992 * nets structure in the asoc. The from address in the mbuf should 5993 * also be loaded (if it is not already). This routine can be called 5994 * with either INIT or INIT-ACK's as long as the m points to the IP 5995 * packet and the offset points to the beginning of the parameters. 5996 */ 5997 struct sctp_inpcb *inp; 5998 struct sctp_nets *net, *nnet, *net_tmp; 5999 struct sctp_paramhdr *phdr, param_buf; 6000 struct sctp_tcb *stcb_tmp; 6001 uint16_t ptype, plen; 6002 struct sockaddr *sa; 6003 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6004 struct sctp_auth_random *p_random = NULL; 6005 uint16_t random_len = 0; 6006 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6007 struct sctp_auth_hmac_algo *hmacs = NULL; 6008 uint16_t hmacs_len = 0; 6009 uint8_t saw_asconf = 0; 6010 uint8_t saw_asconf_ack = 0; 6011 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6012 struct sctp_auth_chunk_list *chunks = NULL; 6013 uint16_t num_chunks = 0; 6014 sctp_key_t *new_key; 6015 uint32_t keylen; 6016 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6017 uint8_t peer_supports_ecn; 6018 uint8_t peer_supports_prsctp; 6019 uint8_t peer_supports_auth; 6020 uint8_t peer_supports_asconf; 6021 uint8_t peer_supports_asconf_ack; 6022 uint8_t peer_supports_reconfig; 6023 uint8_t peer_supports_nrsack; 6024 uint8_t peer_supports_pktdrop; 6025 uint8_t peer_supports_idata; 6026 #ifdef INET 6027 struct sockaddr_in sin; 6028 #endif 6029 #ifdef INET6 6030 struct sockaddr_in6 sin6; 6031 #endif 6032 6033 /* First get the destination address setup too. */ 6034 #ifdef INET 6035 memset(&sin, 0, sizeof(sin)); 6036 sin.sin_family = AF_INET; 6037 sin.sin_len = sizeof(sin); 6038 sin.sin_port = stcb->rport; 6039 #endif 6040 #ifdef INET6 6041 memset(&sin6, 0, sizeof(sin6)); 6042 sin6.sin6_family = AF_INET6; 6043 sin6.sin6_len = sizeof(struct sockaddr_in6); 6044 sin6.sin6_port = stcb->rport; 6045 #endif 6046 if (altsa) { 6047 sa = altsa; 6048 } else { 6049 sa = src; 6050 } 6051 peer_supports_idata = 0; 6052 peer_supports_ecn = 0; 6053 peer_supports_prsctp = 0; 6054 peer_supports_auth = 0; 6055 peer_supports_asconf = 0; 6056 peer_supports_asconf_ack = 0; 6057 peer_supports_reconfig = 0; 6058 peer_supports_nrsack = 0; 6059 peer_supports_pktdrop = 0; 6060 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6061 /* mark all addresses that we have currently on the list */ 6062 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6063 } 6064 /* does the source address already exist? if so skip it */ 6065 inp = stcb->sctp_ep; 6066 atomic_add_int(&stcb->asoc.refcnt, 1); 6067 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6068 atomic_add_int(&stcb->asoc.refcnt, -1); 6069 6070 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6071 /* we must add the source address */ 6072 /* no scope set here since we have a tcb already. */ 6073 switch (sa->sa_family) { 6074 #ifdef INET 6075 case AF_INET: 6076 if (stcb->asoc.scope.ipv4_addr_legal) { 6077 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6078 return (-1); 6079 } 6080 } 6081 break; 6082 #endif 6083 #ifdef INET6 6084 case AF_INET6: 6085 if (stcb->asoc.scope.ipv6_addr_legal) { 6086 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6087 return (-2); 6088 } 6089 } 6090 break; 6091 #endif 6092 default: 6093 break; 6094 } 6095 } else { 6096 if (net_tmp != NULL && stcb_tmp == stcb) { 6097 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6098 } else if (stcb_tmp != stcb) { 6099 /* It belongs to another association? */ 6100 if (stcb_tmp) 6101 SCTP_TCB_UNLOCK(stcb_tmp); 6102 return (-3); 6103 } 6104 } 6105 if (stcb->asoc.state == 0) { 6106 /* the assoc was freed? */ 6107 return (-4); 6108 } 6109 /* now we must go through each of the params. */ 6110 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6111 while (phdr) { 6112 ptype = ntohs(phdr->param_type); 6113 plen = ntohs(phdr->param_length); 6114 /* 6115 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6116 * (uint32_t)ptype, (int)plen); 6117 */ 6118 if (offset + plen > limit) { 6119 break; 6120 } 6121 if (plen < sizeof(struct sctp_paramhdr)) { 6122 break; 6123 } 6124 #ifdef INET 6125 if (ptype == SCTP_IPV4_ADDRESS) { 6126 if (stcb->asoc.scope.ipv4_addr_legal) { 6127 struct sctp_ipv4addr_param *p4, p4_buf; 6128 6129 /* ok get the v4 address and check/add */ 6130 phdr = sctp_get_next_param(m, offset, 6131 (struct sctp_paramhdr *)&p4_buf, 6132 sizeof(p4_buf)); 6133 if (plen != sizeof(struct sctp_ipv4addr_param) || 6134 phdr == NULL) { 6135 return (-5); 6136 } 6137 p4 = (struct sctp_ipv4addr_param *)phdr; 6138 sin.sin_addr.s_addr = p4->addr; 6139 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6140 /* Skip multi-cast addresses */ 6141 goto next_param; 6142 } 6143 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6144 (sin.sin_addr.s_addr == INADDR_ANY)) { 6145 goto next_param; 6146 } 6147 sa = (struct sockaddr *)&sin; 6148 inp = stcb->sctp_ep; 6149 atomic_add_int(&stcb->asoc.refcnt, 1); 6150 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6151 dst, stcb); 6152 atomic_add_int(&stcb->asoc.refcnt, -1); 6153 6154 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6155 inp == NULL) { 6156 /* we must add the source address */ 6157 /* 6158 * no scope set since we have a tcb 6159 * already 6160 */ 6161 6162 /* 6163 * we must validate the state again 6164 * here 6165 */ 6166 add_it_now: 6167 if (stcb->asoc.state == 0) { 6168 /* the assoc was freed? */ 6169 return (-7); 6170 } 6171 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6172 return (-8); 6173 } 6174 } else if (stcb_tmp == stcb) { 6175 if (stcb->asoc.state == 0) { 6176 /* the assoc was freed? */ 6177 return (-10); 6178 } 6179 if (net != NULL) { 6180 /* clear flag */ 6181 net->dest_state &= 6182 ~SCTP_ADDR_NOT_IN_ASSOC; 6183 } 6184 } else { 6185 /* 6186 * strange, address is in another 6187 * assoc? straighten out locks. 6188 */ 6189 if (stcb_tmp) { 6190 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6191 struct mbuf *op_err; 6192 char msg[SCTP_DIAG_INFO_LEN]; 6193 6194 /* 6195 * in setup state we 6196 * abort this guy 6197 */ 6198 SCTP_SNPRINTF(msg, sizeof(msg), 6199 "%s:%d at %s", __FILE__, __LINE__, __func__); 6200 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6201 msg); 6202 sctp_abort_an_association(stcb_tmp->sctp_ep, 6203 stcb_tmp, op_err, false, 6204 SCTP_SO_NOT_LOCKED); 6205 goto add_it_now; 6206 } 6207 SCTP_TCB_UNLOCK(stcb_tmp); 6208 } 6209 6210 if (stcb->asoc.state == 0) { 6211 /* the assoc was freed? */ 6212 return (-12); 6213 } 6214 return (-13); 6215 } 6216 } 6217 } else 6218 #endif 6219 #ifdef INET6 6220 if (ptype == SCTP_IPV6_ADDRESS) { 6221 if (stcb->asoc.scope.ipv6_addr_legal) { 6222 /* ok get the v6 address and check/add */ 6223 struct sctp_ipv6addr_param *p6, p6_buf; 6224 6225 phdr = sctp_get_next_param(m, offset, 6226 (struct sctp_paramhdr *)&p6_buf, 6227 sizeof(p6_buf)); 6228 if (plen != sizeof(struct sctp_ipv6addr_param) || 6229 phdr == NULL) { 6230 return (-14); 6231 } 6232 p6 = (struct sctp_ipv6addr_param *)phdr; 6233 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6234 sizeof(p6->addr)); 6235 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6236 /* Skip multi-cast addresses */ 6237 goto next_param; 6238 } 6239 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6240 /* 6241 * Link local make no sense without 6242 * scope 6243 */ 6244 goto next_param; 6245 } 6246 sa = (struct sockaddr *)&sin6; 6247 inp = stcb->sctp_ep; 6248 atomic_add_int(&stcb->asoc.refcnt, 1); 6249 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6250 dst, stcb); 6251 atomic_add_int(&stcb->asoc.refcnt, -1); 6252 if (stcb_tmp == NULL && 6253 (inp == stcb->sctp_ep || inp == NULL)) { 6254 /* 6255 * we must validate the state again 6256 * here 6257 */ 6258 add_it_now6: 6259 if (stcb->asoc.state == 0) { 6260 /* the assoc was freed? */ 6261 return (-16); 6262 } 6263 /* 6264 * we must add the address, no scope 6265 * set 6266 */ 6267 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6268 return (-17); 6269 } 6270 } else if (stcb_tmp == stcb) { 6271 /* 6272 * we must validate the state again 6273 * here 6274 */ 6275 if (stcb->asoc.state == 0) { 6276 /* the assoc was freed? */ 6277 return (-19); 6278 } 6279 if (net != NULL) { 6280 /* clear flag */ 6281 net->dest_state &= 6282 ~SCTP_ADDR_NOT_IN_ASSOC; 6283 } 6284 } else { 6285 /* 6286 * strange, address is in another 6287 * assoc? straighten out locks. 6288 */ 6289 if (stcb_tmp) { 6290 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6291 struct mbuf *op_err; 6292 char msg[SCTP_DIAG_INFO_LEN]; 6293 6294 /* 6295 * in setup state we 6296 * abort this guy 6297 */ 6298 SCTP_SNPRINTF(msg, sizeof(msg), 6299 "%s:%d at %s", __FILE__, __LINE__, __func__); 6300 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6301 msg); 6302 sctp_abort_an_association(stcb_tmp->sctp_ep, 6303 stcb_tmp, op_err, false, 6304 SCTP_SO_NOT_LOCKED); 6305 goto add_it_now6; 6306 } 6307 SCTP_TCB_UNLOCK(stcb_tmp); 6308 } 6309 if (stcb->asoc.state == 0) { 6310 /* the assoc was freed? */ 6311 return (-21); 6312 } 6313 return (-22); 6314 } 6315 } 6316 } else 6317 #endif 6318 if (ptype == SCTP_ECN_CAPABLE) { 6319 peer_supports_ecn = 1; 6320 } else if (ptype == SCTP_ULP_ADAPTATION) { 6321 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6322 struct sctp_adaptation_layer_indication ai, 6323 *aip; 6324 6325 phdr = sctp_get_next_param(m, offset, 6326 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6327 aip = (struct sctp_adaptation_layer_indication *)phdr; 6328 if (aip) { 6329 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6330 stcb->asoc.adaptation_needed = 1; 6331 } 6332 } 6333 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6334 struct sctp_asconf_addr_param lstore, *fee; 6335 int lptype; 6336 struct sockaddr *lsa = NULL; 6337 #ifdef INET 6338 struct sctp_asconf_addrv4_param *fii; 6339 #endif 6340 6341 if (stcb->asoc.asconf_supported == 0) { 6342 return (-100); 6343 } 6344 if (plen > sizeof(lstore)) { 6345 return (-23); 6346 } 6347 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6348 return (-101); 6349 } 6350 phdr = sctp_get_next_param(m, offset, 6351 (struct sctp_paramhdr *)&lstore, 6352 plen); 6353 if (phdr == NULL) { 6354 return (-24); 6355 } 6356 fee = (struct sctp_asconf_addr_param *)phdr; 6357 lptype = ntohs(fee->addrp.ph.param_type); 6358 switch (lptype) { 6359 #ifdef INET 6360 case SCTP_IPV4_ADDRESS: 6361 if (plen != 6362 sizeof(struct sctp_asconf_addrv4_param)) { 6363 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6364 (int)sizeof(struct sctp_asconf_addrv4_param), 6365 plen); 6366 } else { 6367 fii = (struct sctp_asconf_addrv4_param *)fee; 6368 sin.sin_addr.s_addr = fii->addrp.addr; 6369 lsa = (struct sockaddr *)&sin; 6370 } 6371 break; 6372 #endif 6373 #ifdef INET6 6374 case SCTP_IPV6_ADDRESS: 6375 if (plen != 6376 sizeof(struct sctp_asconf_addr_param)) { 6377 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6378 (int)sizeof(struct sctp_asconf_addr_param), 6379 plen); 6380 } else { 6381 memcpy(sin6.sin6_addr.s6_addr, 6382 fee->addrp.addr, 6383 sizeof(fee->addrp.addr)); 6384 lsa = (struct sockaddr *)&sin6; 6385 } 6386 break; 6387 #endif 6388 default: 6389 break; 6390 } 6391 if (lsa) { 6392 (void)sctp_set_primary_addr(stcb, sa, NULL); 6393 } 6394 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6395 stcb->asoc.peer_supports_nat = 1; 6396 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6397 /* Peer supports pr-sctp */ 6398 peer_supports_prsctp = 1; 6399 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6400 /* A supported extension chunk */ 6401 struct sctp_supported_chunk_types_param *pr_supported; 6402 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6403 int num_ent, i; 6404 6405 if (plen > sizeof(local_store)) { 6406 return (-35); 6407 } 6408 phdr = sctp_get_next_param(m, offset, 6409 (struct sctp_paramhdr *)&local_store, plen); 6410 if (phdr == NULL) { 6411 return (-25); 6412 } 6413 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6414 num_ent = plen - sizeof(struct sctp_paramhdr); 6415 for (i = 0; i < num_ent; i++) { 6416 switch (pr_supported->chunk_types[i]) { 6417 case SCTP_ASCONF: 6418 peer_supports_asconf = 1; 6419 break; 6420 case SCTP_ASCONF_ACK: 6421 peer_supports_asconf_ack = 1; 6422 break; 6423 case SCTP_FORWARD_CUM_TSN: 6424 peer_supports_prsctp = 1; 6425 break; 6426 case SCTP_PACKET_DROPPED: 6427 peer_supports_pktdrop = 1; 6428 break; 6429 case SCTP_NR_SELECTIVE_ACK: 6430 peer_supports_nrsack = 1; 6431 break; 6432 case SCTP_STREAM_RESET: 6433 peer_supports_reconfig = 1; 6434 break; 6435 case SCTP_AUTHENTICATION: 6436 peer_supports_auth = 1; 6437 break; 6438 case SCTP_IDATA: 6439 peer_supports_idata = 1; 6440 break; 6441 default: 6442 /* one I have not learned yet */ 6443 break; 6444 } 6445 } 6446 } else if (ptype == SCTP_RANDOM) { 6447 if (plen > sizeof(random_store)) 6448 break; 6449 if (got_random) { 6450 /* already processed a RANDOM */ 6451 goto next_param; 6452 } 6453 phdr = sctp_get_next_param(m, offset, 6454 (struct sctp_paramhdr *)random_store, 6455 plen); 6456 if (phdr == NULL) 6457 return (-26); 6458 p_random = (struct sctp_auth_random *)phdr; 6459 random_len = plen - sizeof(*p_random); 6460 /* enforce the random length */ 6461 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6462 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6463 return (-27); 6464 } 6465 got_random = 1; 6466 } else if (ptype == SCTP_HMAC_LIST) { 6467 uint16_t num_hmacs; 6468 uint16_t i; 6469 6470 if (plen > sizeof(hmacs_store)) 6471 break; 6472 if (got_hmacs) { 6473 /* already processed a HMAC list */ 6474 goto next_param; 6475 } 6476 phdr = sctp_get_next_param(m, offset, 6477 (struct sctp_paramhdr *)hmacs_store, 6478 plen); 6479 if (phdr == NULL) 6480 return (-28); 6481 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6482 hmacs_len = plen - sizeof(*hmacs); 6483 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6484 /* validate the hmac list */ 6485 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6486 return (-29); 6487 } 6488 if (stcb->asoc.peer_hmacs != NULL) 6489 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6490 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6491 if (stcb->asoc.peer_hmacs != NULL) { 6492 for (i = 0; i < num_hmacs; i++) { 6493 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6494 ntohs(hmacs->hmac_ids[i])); 6495 } 6496 } 6497 got_hmacs = 1; 6498 } else if (ptype == SCTP_CHUNK_LIST) { 6499 int i; 6500 6501 if (plen > sizeof(chunks_store)) 6502 break; 6503 if (got_chklist) { 6504 /* already processed a Chunks list */ 6505 goto next_param; 6506 } 6507 phdr = sctp_get_next_param(m, offset, 6508 (struct sctp_paramhdr *)chunks_store, 6509 plen); 6510 if (phdr == NULL) 6511 return (-30); 6512 chunks = (struct sctp_auth_chunk_list *)phdr; 6513 num_chunks = plen - sizeof(*chunks); 6514 if (stcb->asoc.peer_auth_chunks != NULL) 6515 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6516 else 6517 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6518 for (i = 0; i < num_chunks; i++) { 6519 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6520 stcb->asoc.peer_auth_chunks); 6521 /* record asconf/asconf-ack if listed */ 6522 if (chunks->chunk_types[i] == SCTP_ASCONF) 6523 saw_asconf = 1; 6524 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6525 saw_asconf_ack = 1; 6526 } 6527 got_chklist = 1; 6528 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6529 (ptype == SCTP_STATE_COOKIE) || 6530 (ptype == SCTP_UNRECOG_PARAM) || 6531 (ptype == SCTP_COOKIE_PRESERVE) || 6532 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6533 (ptype == SCTP_ADD_IP_ADDRESS) || 6534 (ptype == SCTP_DEL_IP_ADDRESS) || 6535 (ptype == SCTP_ERROR_CAUSE_IND) || 6536 (ptype == SCTP_SUCCESS_REPORT)) { 6537 /* don't care */ 6538 } else { 6539 if ((ptype & 0x8000) == 0x0000) { 6540 /* 6541 * must stop processing the rest of the 6542 * param's. Any report bits were handled 6543 * with the call to 6544 * sctp_arethere_unrecognized_parameters() 6545 * when the INIT or INIT-ACK was first seen. 6546 */ 6547 break; 6548 } 6549 } 6550 6551 next_param: 6552 offset += SCTP_SIZE32(plen); 6553 if (offset >= limit) { 6554 break; 6555 } 6556 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6557 sizeof(param_buf)); 6558 } 6559 /* Now check to see if we need to purge any addresses */ 6560 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6561 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6562 SCTP_ADDR_NOT_IN_ASSOC) { 6563 /* This address has been removed from the asoc */ 6564 /* remove and free it */ 6565 stcb->asoc.numnets--; 6566 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6567 if (net == stcb->asoc.alternate) { 6568 sctp_free_remote_addr(stcb->asoc.alternate); 6569 stcb->asoc.alternate = NULL; 6570 } 6571 if (net == stcb->asoc.primary_destination) { 6572 stcb->asoc.primary_destination = NULL; 6573 sctp_select_primary_destination(stcb); 6574 } 6575 sctp_free_remote_addr(net); 6576 } 6577 } 6578 if ((stcb->asoc.ecn_supported == 1) && 6579 (peer_supports_ecn == 0)) { 6580 stcb->asoc.ecn_supported = 0; 6581 } 6582 if ((stcb->asoc.prsctp_supported == 1) && 6583 (peer_supports_prsctp == 0)) { 6584 stcb->asoc.prsctp_supported = 0; 6585 } 6586 if ((stcb->asoc.auth_supported == 1) && 6587 ((peer_supports_auth == 0) || 6588 (got_random == 0) || (got_hmacs == 0))) { 6589 stcb->asoc.auth_supported = 0; 6590 } 6591 if ((stcb->asoc.asconf_supported == 1) && 6592 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6593 (stcb->asoc.auth_supported == 0) || 6594 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6595 stcb->asoc.asconf_supported = 0; 6596 } 6597 if ((stcb->asoc.reconfig_supported == 1) && 6598 (peer_supports_reconfig == 0)) { 6599 stcb->asoc.reconfig_supported = 0; 6600 } 6601 if ((stcb->asoc.idata_supported == 1) && 6602 (peer_supports_idata == 0)) { 6603 stcb->asoc.idata_supported = 0; 6604 } 6605 if ((stcb->asoc.nrsack_supported == 1) && 6606 (peer_supports_nrsack == 0)) { 6607 stcb->asoc.nrsack_supported = 0; 6608 } 6609 if ((stcb->asoc.pktdrop_supported == 1) && 6610 (peer_supports_pktdrop == 0)) { 6611 stcb->asoc.pktdrop_supported = 0; 6612 } 6613 /* validate authentication required parameters */ 6614 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6615 /* peer does not support auth but sent a chunks list? */ 6616 return (-31); 6617 } 6618 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6619 /* peer supports asconf but not auth? */ 6620 return (-32); 6621 } else if ((peer_supports_asconf == 1) && 6622 (peer_supports_auth == 1) && 6623 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6624 return (-33); 6625 } 6626 /* concatenate the full random key */ 6627 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6628 if (chunks != NULL) { 6629 keylen += sizeof(*chunks) + num_chunks; 6630 } 6631 new_key = sctp_alloc_key(keylen); 6632 if (new_key != NULL) { 6633 /* copy in the RANDOM */ 6634 if (p_random != NULL) { 6635 keylen = sizeof(*p_random) + random_len; 6636 memcpy(new_key->key, p_random, keylen); 6637 } else { 6638 keylen = 0; 6639 } 6640 /* append in the AUTH chunks */ 6641 if (chunks != NULL) { 6642 memcpy(new_key->key + keylen, chunks, 6643 sizeof(*chunks) + num_chunks); 6644 keylen += sizeof(*chunks) + num_chunks; 6645 } 6646 /* append in the HMACs */ 6647 if (hmacs != NULL) { 6648 memcpy(new_key->key + keylen, hmacs, 6649 sizeof(*hmacs) + hmacs_len); 6650 } 6651 } else { 6652 /* failed to get memory for the key */ 6653 return (-34); 6654 } 6655 if (stcb->asoc.authinfo.peer_random != NULL) 6656 sctp_free_key(stcb->asoc.authinfo.peer_random); 6657 stcb->asoc.authinfo.peer_random = new_key; 6658 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6659 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6660 6661 return (0); 6662 } 6663 6664 int 6665 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6666 struct sctp_nets *net) 6667 { 6668 /* make sure the requested primary address exists in the assoc */ 6669 if (net == NULL && sa) 6670 net = sctp_findnet(stcb, sa); 6671 6672 if (net == NULL) { 6673 /* didn't find the requested primary address! */ 6674 return (-1); 6675 } else { 6676 /* set the primary address */ 6677 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6678 /* Must be confirmed, so queue to set */ 6679 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6680 return (0); 6681 } 6682 stcb->asoc.primary_destination = net; 6683 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6684 sctp_free_remote_addr(stcb->asoc.alternate); 6685 stcb->asoc.alternate = NULL; 6686 } 6687 net = TAILQ_FIRST(&stcb->asoc.nets); 6688 if (net != stcb->asoc.primary_destination) { 6689 /* 6690 * first one on the list is NOT the primary 6691 * sctp_cmpaddr() is much more efficient if the 6692 * primary is the first on the list, make it so. 6693 */ 6694 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6695 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6696 } 6697 return (0); 6698 } 6699 } 6700 6701 int 6702 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6703 { 6704 /* 6705 * This function serves two purposes. It will see if a TAG can be 6706 * re-used and return 1 for yes it is ok and 0 for don't use that 6707 * tag. A secondary function it will do is purge out old tags that 6708 * can be removed. 6709 */ 6710 struct sctpvtaghead *chain; 6711 struct sctp_tagblock *twait_block; 6712 struct sctpasochead *head; 6713 struct sctp_tcb *stcb; 6714 int i; 6715 6716 SCTP_INP_INFO_RLOCK(); 6717 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6718 SCTP_BASE_INFO(hashasocmark))]; 6719 LIST_FOREACH(stcb, head, sctp_asocs) { 6720 /* 6721 * We choose not to lock anything here. TCB's can't be 6722 * removed since we have the read lock, so they can't be 6723 * freed on us, same thing for the INP. I may be wrong with 6724 * this assumption, but we will go with it for now :-) 6725 */ 6726 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6727 continue; 6728 } 6729 if (stcb->asoc.my_vtag == tag) { 6730 /* candidate */ 6731 if (stcb->rport != rport) { 6732 continue; 6733 } 6734 if (stcb->sctp_ep->sctp_lport != lport) { 6735 continue; 6736 } 6737 /* Its a used tag set */ 6738 SCTP_INP_INFO_RUNLOCK(); 6739 return (0); 6740 } 6741 } 6742 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6743 /* Now what about timed wait ? */ 6744 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6745 /* 6746 * Block(s) are present, lets see if we have this tag in the 6747 * list 6748 */ 6749 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6750 if (twait_block->vtag_block[i].v_tag == 0) { 6751 /* not used */ 6752 continue; 6753 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6754 now->tv_sec) { 6755 /* Audit expires this guy */ 6756 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6757 twait_block->vtag_block[i].v_tag = 0; 6758 twait_block->vtag_block[i].lport = 0; 6759 twait_block->vtag_block[i].rport = 0; 6760 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6761 (twait_block->vtag_block[i].lport == lport) && 6762 (twait_block->vtag_block[i].rport == rport)) { 6763 /* Bad tag, sorry :< */ 6764 SCTP_INP_INFO_RUNLOCK(); 6765 return (0); 6766 } 6767 } 6768 } 6769 SCTP_INP_INFO_RUNLOCK(); 6770 return (1); 6771 } 6772 6773 static void 6774 sctp_drain_mbufs(struct sctp_tcb *stcb) 6775 { 6776 /* 6777 * We must hunt this association for MBUF's past the cumack (i.e. 6778 * out of order data that we can renege on). 6779 */ 6780 struct sctp_association *asoc; 6781 struct sctp_tmit_chunk *chk, *nchk; 6782 uint32_t cumulative_tsn_p1; 6783 struct sctp_queued_to_read *control, *ncontrol; 6784 int cnt, strmat; 6785 uint32_t gap, i; 6786 int fnd = 0; 6787 6788 /* We look for anything larger than the cum-ack + 1 */ 6789 6790 asoc = &stcb->asoc; 6791 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6792 /* none we can reneg on. */ 6793 return; 6794 } 6795 SCTP_STAT_INCR(sctps_protocol_drains_done); 6796 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6797 cnt = 0; 6798 /* Ok that was fun, now we will drain all the inbound streams? */ 6799 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6800 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6801 #ifdef INVARIANTS 6802 if (control->on_strm_q != SCTP_ON_ORDERED) { 6803 panic("Huh control: %p on_q: %d -- not ordered?", 6804 control, control->on_strm_q); 6805 } 6806 #endif 6807 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6808 /* Yep it is above cum-ack */ 6809 cnt++; 6810 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6811 KASSERT(control->length > 0, ("control has zero length")); 6812 if (asoc->size_on_all_streams >= control->length) { 6813 asoc->size_on_all_streams -= control->length; 6814 } else { 6815 #ifdef INVARIANTS 6816 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6817 #else 6818 asoc->size_on_all_streams = 0; 6819 #endif 6820 } 6821 sctp_ucount_decr(asoc->cnt_on_all_streams); 6822 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6823 if (control->on_read_q) { 6824 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6825 control->on_read_q = 0; 6826 } 6827 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6828 control->on_strm_q = 0; 6829 if (control->data) { 6830 sctp_m_freem(control->data); 6831 control->data = NULL; 6832 } 6833 sctp_free_remote_addr(control->whoFrom); 6834 /* Now its reasm? */ 6835 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6836 cnt++; 6837 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6838 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6839 if (asoc->size_on_reasm_queue >= chk->send_size) { 6840 asoc->size_on_reasm_queue -= chk->send_size; 6841 } else { 6842 #ifdef INVARIANTS 6843 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6844 #else 6845 asoc->size_on_reasm_queue = 0; 6846 #endif 6847 } 6848 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6849 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6850 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6851 if (chk->data) { 6852 sctp_m_freem(chk->data); 6853 chk->data = NULL; 6854 } 6855 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6856 } 6857 sctp_free_a_readq(stcb, control); 6858 } 6859 } 6860 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6861 #ifdef INVARIANTS 6862 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6863 panic("Huh control: %p on_q: %d -- not unordered?", 6864 control, control->on_strm_q); 6865 } 6866 #endif 6867 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6868 /* Yep it is above cum-ack */ 6869 cnt++; 6870 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6871 KASSERT(control->length > 0, ("control has zero length")); 6872 if (asoc->size_on_all_streams >= control->length) { 6873 asoc->size_on_all_streams -= control->length; 6874 } else { 6875 #ifdef INVARIANTS 6876 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6877 #else 6878 asoc->size_on_all_streams = 0; 6879 #endif 6880 } 6881 sctp_ucount_decr(asoc->cnt_on_all_streams); 6882 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6883 if (control->on_read_q) { 6884 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6885 control->on_read_q = 0; 6886 } 6887 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6888 control->on_strm_q = 0; 6889 if (control->data) { 6890 sctp_m_freem(control->data); 6891 control->data = NULL; 6892 } 6893 sctp_free_remote_addr(control->whoFrom); 6894 /* Now its reasm? */ 6895 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6896 cnt++; 6897 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6898 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6899 if (asoc->size_on_reasm_queue >= chk->send_size) { 6900 asoc->size_on_reasm_queue -= chk->send_size; 6901 } else { 6902 #ifdef INVARIANTS 6903 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6904 #else 6905 asoc->size_on_reasm_queue = 0; 6906 #endif 6907 } 6908 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6909 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6910 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6911 if (chk->data) { 6912 sctp_m_freem(chk->data); 6913 chk->data = NULL; 6914 } 6915 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6916 } 6917 sctp_free_a_readq(stcb, control); 6918 } 6919 } 6920 } 6921 if (cnt) { 6922 /* We must back down to see what the new highest is */ 6923 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6924 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6925 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6926 asoc->highest_tsn_inside_map = i; 6927 fnd = 1; 6928 break; 6929 } 6930 } 6931 if (!fnd) { 6932 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6933 } 6934 6935 /* 6936 * Question, should we go through the delivery queue? The 6937 * only reason things are on here is the app not reading OR 6938 * a p-d-api up. An attacker COULD send enough in to 6939 * initiate the PD-API and then send a bunch of stuff to 6940 * other streams... these would wind up on the delivery 6941 * queue.. and then we would not get to them. But in order 6942 * to do this I then have to back-track and un-deliver 6943 * sequence numbers in streams.. el-yucko. I think for now 6944 * we will NOT look at the delivery queue and leave it to be 6945 * something to consider later. An alternative would be to 6946 * abort the P-D-API with a notification and then deliver 6947 * the data.... Or another method might be to keep track of 6948 * how many times the situation occurs and if we see a 6949 * possible attack underway just abort the association. 6950 */ 6951 #ifdef SCTP_DEBUG 6952 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6953 #endif 6954 /* 6955 * Now do we need to find a new 6956 * asoc->highest_tsn_inside_map? 6957 */ 6958 asoc->last_revoke_count = cnt; 6959 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6960 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6961 /* sa_ignore NO_NULL_CHK */ 6962 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6963 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6964 } 6965 /* 6966 * Another issue, in un-setting the TSN's in the mapping array we 6967 * DID NOT adjust the highest_tsn marker. This will cause one of 6968 * two things to occur. It may cause us to do extra work in checking 6969 * for our mapping array movement. More importantly it may cause us 6970 * to SACK every datagram. This may not be a bad thing though since 6971 * we will recover once we get our cum-ack above and all this stuff 6972 * we dumped recovered. 6973 */ 6974 } 6975 6976 void 6977 sctp_drain() 6978 { 6979 /* 6980 * We must walk the PCB lists for ALL associations here. The system 6981 * is LOW on MBUF's and needs help. This is where reneging will 6982 * occur. We really hope this does NOT happen! 6983 */ 6984 VNET_ITERATOR_DECL(vnet_iter); 6985 VNET_LIST_RLOCK_NOSLEEP(); 6986 VNET_FOREACH(vnet_iter) { 6987 CURVNET_SET(vnet_iter); 6988 struct sctp_inpcb *inp; 6989 struct sctp_tcb *stcb; 6990 6991 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6992 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6993 #ifdef VIMAGE 6994 continue; 6995 #else 6996 return; 6997 #endif 6998 } 6999 SCTP_INP_INFO_RLOCK(); 7000 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7001 /* For each endpoint */ 7002 SCTP_INP_RLOCK(inp); 7003 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7004 /* For each association */ 7005 SCTP_TCB_LOCK(stcb); 7006 sctp_drain_mbufs(stcb); 7007 SCTP_TCB_UNLOCK(stcb); 7008 } 7009 SCTP_INP_RUNLOCK(inp); 7010 } 7011 SCTP_INP_INFO_RUNLOCK(); 7012 CURVNET_RESTORE(); 7013 } 7014 VNET_LIST_RUNLOCK_NOSLEEP(); 7015 } 7016 7017 /* 7018 * start a new iterator 7019 * iterates through all endpoints and associations based on the pcb_state 7020 * flags and asoc_state. "af" (mandatory) is executed for all matching 7021 * assocs and "ef" (optional) is executed when the iterator completes. 7022 * "inpf" (optional) is executed for each new endpoint as it is being 7023 * iterated through. inpe (optional) is called when the inp completes 7024 * its way through all the stcbs. 7025 */ 7026 int 7027 sctp_initiate_iterator(inp_func inpf, 7028 asoc_func af, 7029 inp_func inpe, 7030 uint32_t pcb_state, 7031 uint32_t pcb_features, 7032 uint32_t asoc_state, 7033 void *argp, 7034 uint32_t argi, 7035 end_func ef, 7036 struct sctp_inpcb *s_inp, 7037 uint8_t chunk_output_off) 7038 { 7039 struct sctp_iterator *it = NULL; 7040 7041 if (af == NULL) { 7042 return (-1); 7043 } 7044 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7045 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7046 SCTP_BASE_VAR(sctp_pcb_initialized)); 7047 return (-1); 7048 } 7049 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7050 SCTP_M_ITER); 7051 if (it == NULL) { 7052 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7053 return (-1); 7054 } 7055 memset(it, 0, sizeof(*it)); 7056 it->function_assoc = af; 7057 it->function_inp = inpf; 7058 if (inpf) 7059 it->done_current_ep = 0; 7060 else 7061 it->done_current_ep = 1; 7062 it->function_atend = ef; 7063 it->pointer = argp; 7064 it->val = argi; 7065 it->pcb_flags = pcb_state; 7066 it->pcb_features = pcb_features; 7067 it->asoc_state = asoc_state; 7068 it->function_inp_end = inpe; 7069 it->no_chunk_output = chunk_output_off; 7070 it->vn = curvnet; 7071 if (s_inp) { 7072 /* Assume lock is held here */ 7073 it->inp = s_inp; 7074 SCTP_INP_INCR_REF(it->inp); 7075 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7076 } else { 7077 SCTP_INP_INFO_RLOCK(); 7078 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7079 if (it->inp) { 7080 SCTP_INP_INCR_REF(it->inp); 7081 } 7082 SCTP_INP_INFO_RUNLOCK(); 7083 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7084 } 7085 SCTP_IPI_ITERATOR_WQ_LOCK(); 7086 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7087 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7088 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7089 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7090 SCTP_FREE(it, SCTP_M_ITER); 7091 return (-1); 7092 } 7093 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7094 if (sctp_it_ctl.iterator_running == 0) { 7095 sctp_wakeup_iterator(); 7096 } 7097 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7098 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7099 return (0); 7100 } 7101