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 } 191 192 193 struct sctp_ifn * 194 sctp_find_ifn(void *ifn, uint32_t ifn_index) 195 { 196 struct sctp_ifn *sctp_ifnp; 197 struct sctp_ifnlist *hash_ifn_head; 198 199 /* 200 * We assume the lock is held for the addresses if that's wrong 201 * problems could occur :-) 202 */ 203 SCTP_IPI_ADDR_LOCK_ASSERT(); 204 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 205 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 206 if (sctp_ifnp->ifn_index == ifn_index) { 207 return (sctp_ifnp); 208 } 209 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 210 return (sctp_ifnp); 211 } 212 } 213 return (NULL); 214 } 215 216 217 struct sctp_vrf * 218 sctp_find_vrf(uint32_t vrf_id) 219 { 220 struct sctp_vrflist *bucket; 221 struct sctp_vrf *liste; 222 223 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 224 LIST_FOREACH(liste, bucket, next_vrf) { 225 if (vrf_id == liste->vrf_id) { 226 return (liste); 227 } 228 } 229 return (NULL); 230 } 231 232 233 void 234 sctp_free_vrf(struct sctp_vrf *vrf) 235 { 236 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 237 if (vrf->vrf_addr_hash) { 238 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 239 vrf->vrf_addr_hash = NULL; 240 } 241 /* We zero'd the count */ 242 LIST_REMOVE(vrf, next_vrf); 243 SCTP_FREE(vrf, SCTP_M_VRF); 244 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 245 } 246 } 247 248 249 void 250 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 251 { 252 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 253 /* We zero'd the count */ 254 if (sctp_ifnp->vrf) { 255 sctp_free_vrf(sctp_ifnp->vrf); 256 } 257 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 258 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 259 } 260 } 261 262 263 void 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 265 { 266 struct sctp_ifn *sctp_ifnp; 267 268 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 269 if (sctp_ifnp != NULL) { 270 sctp_ifnp->ifn_mtu = mtu; 271 } 272 } 273 274 275 void 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 277 { 278 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 279 /* We zero'd the count */ 280 if (sctp_ifap->ifn_p) { 281 sctp_free_ifn(sctp_ifap->ifn_p); 282 } 283 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 284 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 285 } 286 } 287 288 289 static void 290 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 291 { 292 struct sctp_ifn *found; 293 294 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 295 if (found == NULL) { 296 /* Not in the list.. sorry */ 297 return; 298 } 299 if (hold_addr_lock == 0) { 300 SCTP_IPI_ADDR_WLOCK(); 301 } else { 302 SCTP_IPI_ADDR_WLOCK_ASSERT(); 303 } 304 LIST_REMOVE(sctp_ifnp, next_bucket); 305 LIST_REMOVE(sctp_ifnp, next_ifn); 306 if (hold_addr_lock == 0) { 307 SCTP_IPI_ADDR_WUNLOCK(); 308 } 309 /* Take away the reference, and possibly free it */ 310 sctp_free_ifn(sctp_ifnp); 311 } 312 313 314 void 315 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 316 const char *if_name, uint32_t ifn_index) 317 { 318 struct sctp_vrf *vrf; 319 struct sctp_ifa *sctp_ifap; 320 321 SCTP_IPI_ADDR_RLOCK(); 322 vrf = sctp_find_vrf(vrf_id); 323 if (vrf == NULL) { 324 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 325 goto out; 326 327 } 328 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 329 if (sctp_ifap == NULL) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 331 goto out; 332 } 333 if (sctp_ifap->ifn_p == NULL) { 334 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 335 goto out; 336 } 337 if (if_name) { 338 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 340 sctp_ifap->ifn_p->ifn_name, if_name); 341 goto out; 342 } 343 } else { 344 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 345 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 346 sctp_ifap->ifn_p->ifn_index, ifn_index); 347 goto out; 348 } 349 } 350 351 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 352 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 353 out: 354 SCTP_IPI_ADDR_RUNLOCK(); 355 } 356 357 358 void 359 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 360 const char *if_name, uint32_t ifn_index) 361 { 362 struct sctp_vrf *vrf; 363 struct sctp_ifa *sctp_ifap; 364 365 SCTP_IPI_ADDR_RLOCK(); 366 vrf = sctp_find_vrf(vrf_id); 367 if (vrf == NULL) { 368 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 369 goto out; 370 371 } 372 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 373 if (sctp_ifap == NULL) { 374 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 375 goto out; 376 } 377 if (sctp_ifap->ifn_p == NULL) { 378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 379 goto out; 380 } 381 if (if_name) { 382 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 383 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 384 sctp_ifap->ifn_p->ifn_name, if_name); 385 goto out; 386 } 387 } else { 388 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 389 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 390 sctp_ifap->ifn_p->ifn_index, ifn_index); 391 goto out; 392 } 393 } 394 395 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 396 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 397 out: 398 SCTP_IPI_ADDR_RUNLOCK(); 399 } 400 401 402 /*- 403 * Add an ifa to an ifn. 404 * Register the interface as necessary. 405 * NOTE: ADDR write lock MUST be held. 406 */ 407 static void 408 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 409 { 410 int ifa_af; 411 412 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 413 sctp_ifap->ifn_p = sctp_ifnp; 414 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 415 /* update address counts */ 416 sctp_ifnp->ifa_count++; 417 ifa_af = sctp_ifap->address.sa.sa_family; 418 switch (ifa_af) { 419 #ifdef INET 420 case AF_INET: 421 sctp_ifnp->num_v4++; 422 break; 423 #endif 424 #ifdef INET6 425 case AF_INET6: 426 sctp_ifnp->num_v6++; 427 break; 428 #endif 429 default: 430 break; 431 } 432 if (sctp_ifnp->ifa_count == 1) { 433 /* register the new interface */ 434 sctp_ifnp->registered_af = ifa_af; 435 } 436 } 437 438 439 /*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445 static void 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447 { 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453 #ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457 #endif 458 #ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462 #endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 sctp_ifap->ifn_p->registered_af = AF_INET; 475 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 476 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 477 sctp_ifap->ifn_p->registered_af = AF_INET6; 478 } 479 /* free the ifn refcount */ 480 sctp_free_ifn(sctp_ifap->ifn_p); 481 } 482 sctp_ifap->ifn_p = NULL; 483 } 484 } 485 486 487 struct sctp_ifa * 488 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 489 uint32_t ifn_type, const char *if_name, void *ifa, 490 struct sockaddr *addr, uint32_t ifa_flags, 491 int dynamic_add) 492 { 493 struct sctp_vrf *vrf; 494 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp; 495 struct sctp_ifa *sctp_ifap, *new_sctp_ifap; 496 struct sctp_ifalist *hash_addr_head; 497 struct sctp_ifnlist *hash_ifn_head; 498 uint32_t hash_of_addr; 499 int new_ifn_af = 0; 500 501 #ifdef SCTP_DEBUG 502 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 503 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 504 #endif 505 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *, 506 sizeof(struct sctp_ifn), SCTP_M_IFN); 507 if (new_sctp_ifnp == NULL) { 508 #ifdef INVARIANTS 509 panic("No memory for IFN"); 510 #endif 511 return (NULL); 512 } 513 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 514 if (new_sctp_ifap == NULL) { 515 #ifdef INVARIANTS 516 panic("No memory for IFA"); 517 #endif 518 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 519 return (NULL); 520 } 521 522 SCTP_IPI_ADDR_WLOCK(); 523 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 524 if (sctp_ifnp) { 525 vrf = sctp_ifnp->vrf; 526 } else { 527 vrf = sctp_find_vrf(vrf_id); 528 if (vrf == NULL) { 529 vrf = sctp_allocate_vrf(vrf_id); 530 if (vrf == NULL) { 531 SCTP_IPI_ADDR_WUNLOCK(); 532 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 533 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 534 return (NULL); 535 } 536 } 537 } 538 if (sctp_ifnp == NULL) { 539 /* 540 * build one and add it, can't hold lock until after malloc 541 * done though. 542 */ 543 sctp_ifnp = new_sctp_ifnp; 544 new_sctp_ifnp = NULL; 545 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 546 sctp_ifnp->ifn_index = ifn_index; 547 sctp_ifnp->ifn_p = ifn; 548 sctp_ifnp->ifn_type = ifn_type; 549 sctp_ifnp->refcount = 0; 550 sctp_ifnp->vrf = vrf; 551 atomic_add_int(&vrf->refcount, 1); 552 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 553 if (if_name != NULL) { 554 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 555 } else { 556 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 557 } 558 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 559 LIST_INIT(&sctp_ifnp->ifalist); 560 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 561 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 562 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 563 new_ifn_af = 1; 564 } 565 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 566 if (sctp_ifap) { 567 /* Hmm, it already exists? */ 568 if ((sctp_ifap->ifn_p) && 569 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 570 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 571 sctp_ifap->ifn_p->ifn_name, ifn_index, 572 (void *)sctp_ifap); 573 if (new_ifn_af) { 574 /* Remove the created one that we don't want */ 575 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 576 } 577 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 578 /* easy to solve, just switch back to active */ 579 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 580 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 581 sctp_ifap->ifn_p = sctp_ifnp; 582 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 583 } 584 exit_stage_left: 585 SCTP_IPI_ADDR_WUNLOCK(); 586 if (new_sctp_ifnp != NULL) { 587 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 588 } 589 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 590 return (sctp_ifap); 591 } else { 592 if (sctp_ifap->ifn_p) { 593 /* 594 * The last IFN gets the address, remove the 595 * old one 596 */ 597 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 598 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 599 sctp_ifap->ifn_p->ifn_index, if_name, 600 ifn_index); 601 /* remove the address from the old ifn */ 602 sctp_remove_ifa_from_ifn(sctp_ifap); 603 /* move the address over to the new ifn */ 604 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 605 goto exit_stage_left; 606 } else { 607 /* repair ifnp which was NULL ? */ 608 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 609 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 610 (void *)sctp_ifnp, (void *)sctp_ifap); 611 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 612 } 613 goto exit_stage_left; 614 } 615 } 616 sctp_ifap = new_sctp_ifap; 617 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 618 sctp_ifap->ifn_p = sctp_ifnp; 619 atomic_add_int(&sctp_ifnp->refcount, 1); 620 sctp_ifap->vrf_id = vrf_id; 621 sctp_ifap->ifa = ifa; 622 memcpy(&sctp_ifap->address, addr, addr->sa_len); 623 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 624 sctp_ifap->flags = ifa_flags; 625 /* Set scope */ 626 switch (sctp_ifap->address.sa.sa_family) { 627 #ifdef INET 628 case AF_INET: 629 { 630 struct sockaddr_in *sin; 631 632 sin = &sctp_ifap->address.sin; 633 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 634 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 635 sctp_ifap->src_is_loop = 1; 636 } 637 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 638 sctp_ifap->src_is_priv = 1; 639 } 640 sctp_ifnp->num_v4++; 641 if (new_ifn_af) 642 new_ifn_af = AF_INET; 643 break; 644 } 645 #endif 646 #ifdef INET6 647 case AF_INET6: 648 { 649 /* ok to use deprecated addresses? */ 650 struct sockaddr_in6 *sin6; 651 652 sin6 = &sctp_ifap->address.sin6; 653 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 654 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 655 sctp_ifap->src_is_loop = 1; 656 } 657 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 658 sctp_ifap->src_is_priv = 1; 659 } 660 sctp_ifnp->num_v6++; 661 if (new_ifn_af) 662 new_ifn_af = AF_INET6; 663 break; 664 } 665 #endif 666 default: 667 new_ifn_af = 0; 668 break; 669 } 670 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 671 672 if ((sctp_ifap->src_is_priv == 0) && 673 (sctp_ifap->src_is_loop == 0)) { 674 sctp_ifap->src_is_glob = 1; 675 } 676 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 677 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 678 sctp_ifap->refcount = 1; 679 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 680 sctp_ifnp->ifa_count++; 681 vrf->total_ifa_count++; 682 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 683 if (new_ifn_af) { 684 sctp_ifnp->registered_af = new_ifn_af; 685 } 686 SCTP_IPI_ADDR_WUNLOCK(); 687 if (new_sctp_ifnp != NULL) { 688 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 689 } 690 691 if (dynamic_add) { 692 /* 693 * Bump up the refcount so that when the timer completes it 694 * will drop back down. 695 */ 696 struct sctp_laddr *wi; 697 698 atomic_add_int(&sctp_ifap->refcount, 1); 699 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 700 if (wi == NULL) { 701 /* 702 * Gak, what can we do? We have lost an address 703 * change can you say HOSED? 704 */ 705 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 706 /* Opps, must decrement the count */ 707 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 708 if_name); 709 return (NULL); 710 } 711 SCTP_INCR_LADDR_COUNT(); 712 memset(wi, 0, sizeof(*wi)); 713 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 714 wi->ifa = sctp_ifap; 715 wi->action = SCTP_ADD_IP_ADDRESS; 716 717 SCTP_WQ_ADDR_LOCK(); 718 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 719 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 720 (struct sctp_inpcb *)NULL, 721 (struct sctp_tcb *)NULL, 722 (struct sctp_nets *)NULL); 723 SCTP_WQ_ADDR_UNLOCK(); 724 } else { 725 /* it's ready for use */ 726 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 727 } 728 return (sctp_ifap); 729 } 730 731 void 732 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 733 uint32_t ifn_index, const char *if_name) 734 { 735 struct sctp_vrf *vrf; 736 struct sctp_ifa *sctp_ifap = NULL; 737 738 SCTP_IPI_ADDR_WLOCK(); 739 vrf = sctp_find_vrf(vrf_id); 740 if (vrf == NULL) { 741 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 742 goto out_now; 743 } 744 745 #ifdef SCTP_DEBUG 746 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 747 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 748 #endif 749 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 750 if (sctp_ifap) { 751 /* Validate the delete */ 752 if (sctp_ifap->ifn_p) { 753 int valid = 0; 754 755 /*- 756 * The name has priority over the ifn_index 757 * if its given. 758 */ 759 if (if_name) { 760 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 761 /* They match its a correct delete */ 762 valid = 1; 763 } 764 } 765 if (!valid) { 766 /* last ditch check ifn_index */ 767 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 768 valid = 1; 769 } 770 } 771 if (!valid) { 772 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 773 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 774 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 775 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 776 SCTP_IPI_ADDR_WUNLOCK(); 777 return; 778 } 779 } 780 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 781 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 782 /* 783 * We don't set the flag. This means that the structure will 784 * hang around in EP's that have bound specific to it until 785 * they close. This gives us TCP like behavior if someone 786 * removes an address (or for that matter adds it right 787 * back). 788 */ 789 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 790 vrf->total_ifa_count--; 791 LIST_REMOVE(sctp_ifap, next_bucket); 792 sctp_remove_ifa_from_ifn(sctp_ifap); 793 } 794 #ifdef SCTP_DEBUG 795 else { 796 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 797 ifn_index); 798 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 799 } 800 #endif 801 802 out_now: 803 SCTP_IPI_ADDR_WUNLOCK(); 804 if (sctp_ifap) { 805 struct sctp_laddr *wi; 806 807 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 808 if (wi == NULL) { 809 /* 810 * Gak, what can we do? We have lost an address 811 * change can you say HOSED? 812 */ 813 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 814 815 /* Oops, must decrement the count */ 816 sctp_free_ifa(sctp_ifap); 817 return; 818 } 819 SCTP_INCR_LADDR_COUNT(); 820 memset(wi, 0, sizeof(*wi)); 821 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 822 wi->ifa = sctp_ifap; 823 wi->action = SCTP_DEL_IP_ADDRESS; 824 SCTP_WQ_ADDR_LOCK(); 825 /* 826 * Should this really be a tailq? As it is we will process 827 * the newest first :-0 828 */ 829 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 830 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 831 (struct sctp_inpcb *)NULL, 832 (struct sctp_tcb *)NULL, 833 (struct sctp_nets *)NULL); 834 SCTP_WQ_ADDR_UNLOCK(); 835 } 836 return; 837 } 838 839 840 static int 841 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 842 { 843 int loopback_scope; 844 #if defined(INET) 845 int ipv4_local_scope, ipv4_addr_legal; 846 #endif 847 #if defined(INET6) 848 int local_scope, site_scope, ipv6_addr_legal; 849 #endif 850 struct sctp_vrf *vrf; 851 struct sctp_ifn *sctp_ifn; 852 struct sctp_ifa *sctp_ifa; 853 854 loopback_scope = stcb->asoc.scope.loopback_scope; 855 #if defined(INET) 856 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 857 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 858 #endif 859 #if defined(INET6) 860 local_scope = stcb->asoc.scope.local_scope; 861 site_scope = stcb->asoc.scope.site_scope; 862 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 863 #endif 864 865 SCTP_IPI_ADDR_RLOCK(); 866 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 867 if (vrf == NULL) { 868 /* no vrf, no addresses */ 869 SCTP_IPI_ADDR_RUNLOCK(); 870 return (0); 871 } 872 873 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 874 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 875 if ((loopback_scope == 0) && 876 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 877 continue; 878 } 879 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 880 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 881 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 882 /* 883 * We allow pending addresses, where 884 * we have sent an asconf-add to be 885 * considered valid. 886 */ 887 continue; 888 } 889 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 890 continue; 891 } 892 switch (sctp_ifa->address.sa.sa_family) { 893 #ifdef INET 894 case AF_INET: 895 if (ipv4_addr_legal) { 896 struct sockaddr_in *sin, 897 *rsin; 898 899 sin = &sctp_ifa->address.sin; 900 rsin = (struct sockaddr_in *)to; 901 if ((ipv4_local_scope == 0) && 902 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 903 continue; 904 } 905 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 906 &sin->sin_addr) != 0) { 907 continue; 908 } 909 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 910 SCTP_IPI_ADDR_RUNLOCK(); 911 return (1); 912 } 913 } 914 break; 915 #endif 916 #ifdef INET6 917 case AF_INET6: 918 if (ipv6_addr_legal) { 919 struct sockaddr_in6 *sin6, 920 *rsin6; 921 922 sin6 = &sctp_ifa->address.sin6; 923 rsin6 = (struct sockaddr_in6 *)to; 924 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 925 &sin6->sin6_addr) != 0) { 926 continue; 927 } 928 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 929 if (local_scope == 0) 930 continue; 931 if (sin6->sin6_scope_id == 0) { 932 if (sa6_recoverscope(sin6) != 0) 933 continue; 934 } 935 } 936 if ((site_scope == 0) && 937 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 938 continue; 939 } 940 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 941 SCTP_IPI_ADDR_RUNLOCK(); 942 return (1); 943 } 944 } 945 break; 946 #endif 947 default: 948 /* TSNH */ 949 break; 950 } 951 } 952 } 953 } else { 954 struct sctp_laddr *laddr; 955 956 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 957 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 958 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 959 continue; 960 } 961 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 962 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 963 /* 964 * We allow pending addresses, where we have 965 * sent an asconf-add to be considered 966 * valid. 967 */ 968 continue; 969 } 970 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 971 continue; 972 } 973 switch (to->sa_family) { 974 #ifdef INET 975 case AF_INET: 976 { 977 struct sockaddr_in *sin, *rsin; 978 979 sin = &laddr->ifa->address.sin; 980 rsin = (struct sockaddr_in *)to; 981 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 982 SCTP_IPI_ADDR_RUNLOCK(); 983 return (1); 984 } 985 break; 986 } 987 #endif 988 #ifdef INET6 989 case AF_INET6: 990 { 991 struct sockaddr_in6 *sin6, *rsin6; 992 993 sin6 = &laddr->ifa->address.sin6; 994 rsin6 = (struct sockaddr_in6 *)to; 995 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 996 SCTP_IPI_ADDR_RUNLOCK(); 997 return (1); 998 } 999 break; 1000 } 1001 1002 #endif 1003 default: 1004 /* TSNH */ 1005 break; 1006 } 1007 1008 } 1009 } 1010 SCTP_IPI_ADDR_RUNLOCK(); 1011 return (0); 1012 } 1013 1014 1015 static struct sctp_tcb * 1016 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1017 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1018 { 1019 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1020 /* 1021 * If we support the TCP model, then we must now dig through to see 1022 * if we can find our endpoint in the list of tcp ep's. 1023 */ 1024 uint16_t lport, rport; 1025 struct sctppcbhead *ephead; 1026 struct sctp_inpcb *inp; 1027 struct sctp_laddr *laddr; 1028 struct sctp_tcb *stcb; 1029 struct sctp_nets *net; 1030 1031 if ((to == NULL) || (from == NULL)) { 1032 return (NULL); 1033 } 1034 1035 switch (to->sa_family) { 1036 #ifdef INET 1037 case AF_INET: 1038 if (from->sa_family == AF_INET) { 1039 lport = ((struct sockaddr_in *)to)->sin_port; 1040 rport = ((struct sockaddr_in *)from)->sin_port; 1041 } else { 1042 return (NULL); 1043 } 1044 break; 1045 #endif 1046 #ifdef INET6 1047 case AF_INET6: 1048 if (from->sa_family == AF_INET6) { 1049 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1050 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1051 } else { 1052 return (NULL); 1053 } 1054 break; 1055 #endif 1056 default: 1057 return (NULL); 1058 } 1059 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1060 /* 1061 * Ok now for each of the guys in this bucket we must look and see: 1062 * - Does the remote port match. - Does there single association's 1063 * addresses match this address (to). If so we update p_ep to point 1064 * to this ep and return the tcb from it. 1065 */ 1066 LIST_FOREACH(inp, ephead, sctp_hash) { 1067 SCTP_INP_RLOCK(inp); 1068 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1069 SCTP_INP_RUNLOCK(inp); 1070 continue; 1071 } 1072 if (lport != inp->sctp_lport) { 1073 SCTP_INP_RUNLOCK(inp); 1074 continue; 1075 } 1076 switch (to->sa_family) { 1077 #ifdef INET 1078 case AF_INET: 1079 { 1080 struct sockaddr_in *sin; 1081 1082 sin = (struct sockaddr_in *)to; 1083 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1084 &sin->sin_addr) != 0) { 1085 SCTP_INP_RUNLOCK(inp); 1086 continue; 1087 } 1088 break; 1089 } 1090 #endif 1091 #ifdef INET6 1092 case AF_INET6: 1093 { 1094 struct sockaddr_in6 *sin6; 1095 1096 sin6 = (struct sockaddr_in6 *)to; 1097 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1098 &sin6->sin6_addr) != 0) { 1099 SCTP_INP_RUNLOCK(inp); 1100 continue; 1101 } 1102 break; 1103 } 1104 #endif 1105 default: 1106 SCTP_INP_RUNLOCK(inp); 1107 continue; 1108 } 1109 if (inp->def_vrf_id != vrf_id) { 1110 SCTP_INP_RUNLOCK(inp); 1111 continue; 1112 } 1113 /* check to see if the ep has one of the addresses */ 1114 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1115 /* We are NOT bound all, so look further */ 1116 int match = 0; 1117 1118 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1119 1120 if (laddr->ifa == NULL) { 1121 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1122 continue; 1123 } 1124 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1125 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1126 continue; 1127 } 1128 if (laddr->ifa->address.sa.sa_family == 1129 to->sa_family) { 1130 /* see if it matches */ 1131 #ifdef INET 1132 if (from->sa_family == AF_INET) { 1133 struct sockaddr_in *intf_addr, 1134 *sin; 1135 1136 intf_addr = &laddr->ifa->address.sin; 1137 sin = (struct sockaddr_in *)to; 1138 if (sin->sin_addr.s_addr == 1139 intf_addr->sin_addr.s_addr) { 1140 match = 1; 1141 break; 1142 } 1143 } 1144 #endif 1145 #ifdef INET6 1146 if (from->sa_family == AF_INET6) { 1147 struct sockaddr_in6 *intf_addr6; 1148 struct sockaddr_in6 *sin6; 1149 1150 sin6 = (struct sockaddr_in6 *) 1151 to; 1152 intf_addr6 = &laddr->ifa->address.sin6; 1153 1154 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1155 intf_addr6)) { 1156 match = 1; 1157 break; 1158 } 1159 } 1160 #endif 1161 } 1162 } 1163 if (match == 0) { 1164 /* This endpoint does not have this address */ 1165 SCTP_INP_RUNLOCK(inp); 1166 continue; 1167 } 1168 } 1169 /* 1170 * Ok if we hit here the ep has the address, does it hold 1171 * the tcb? 1172 */ 1173 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1174 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1175 if (stcb == NULL) { 1176 SCTP_INP_RUNLOCK(inp); 1177 continue; 1178 } 1179 SCTP_TCB_LOCK(stcb); 1180 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1181 SCTP_TCB_UNLOCK(stcb); 1182 SCTP_INP_RUNLOCK(inp); 1183 continue; 1184 } 1185 if (stcb->rport != rport) { 1186 /* remote port does not match. */ 1187 SCTP_TCB_UNLOCK(stcb); 1188 SCTP_INP_RUNLOCK(inp); 1189 continue; 1190 } 1191 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1192 SCTP_TCB_UNLOCK(stcb); 1193 SCTP_INP_RUNLOCK(inp); 1194 continue; 1195 } 1196 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1197 SCTP_TCB_UNLOCK(stcb); 1198 SCTP_INP_RUNLOCK(inp); 1199 continue; 1200 } 1201 /* Does this TCB have a matching address? */ 1202 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1203 1204 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1205 /* not the same family, can't be a match */ 1206 continue; 1207 } 1208 switch (from->sa_family) { 1209 #ifdef INET 1210 case AF_INET: 1211 { 1212 struct sockaddr_in *sin, *rsin; 1213 1214 sin = (struct sockaddr_in *)&net->ro._l_addr; 1215 rsin = (struct sockaddr_in *)from; 1216 if (sin->sin_addr.s_addr == 1217 rsin->sin_addr.s_addr) { 1218 /* found it */ 1219 if (netp != NULL) { 1220 *netp = net; 1221 } 1222 /* 1223 * Update the endpoint 1224 * pointer 1225 */ 1226 *inp_p = inp; 1227 SCTP_INP_RUNLOCK(inp); 1228 return (stcb); 1229 } 1230 break; 1231 } 1232 #endif 1233 #ifdef INET6 1234 case AF_INET6: 1235 { 1236 struct sockaddr_in6 *sin6, *rsin6; 1237 1238 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1239 rsin6 = (struct sockaddr_in6 *)from; 1240 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1241 rsin6)) { 1242 /* found it */ 1243 if (netp != NULL) { 1244 *netp = net; 1245 } 1246 /* 1247 * Update the endpoint 1248 * pointer 1249 */ 1250 *inp_p = inp; 1251 SCTP_INP_RUNLOCK(inp); 1252 return (stcb); 1253 } 1254 break; 1255 } 1256 #endif 1257 default: 1258 /* TSNH */ 1259 break; 1260 } 1261 } 1262 SCTP_TCB_UNLOCK(stcb); 1263 SCTP_INP_RUNLOCK(inp); 1264 } 1265 return (NULL); 1266 } 1267 1268 1269 /* 1270 * rules for use 1271 * 1272 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1273 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1274 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1275 * NULL. 1276 */ 1277 1278 struct sctp_tcb * 1279 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1280 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1281 { 1282 struct sctpasochead *head; 1283 struct sctp_inpcb *inp; 1284 struct sctp_tcb *stcb = NULL; 1285 struct sctp_nets *net; 1286 uint16_t rport; 1287 1288 inp = *inp_p; 1289 switch (remote->sa_family) { 1290 #ifdef INET 1291 case AF_INET: 1292 rport = (((struct sockaddr_in *)remote)->sin_port); 1293 break; 1294 #endif 1295 #ifdef INET6 1296 case AF_INET6: 1297 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1298 break; 1299 #endif 1300 default: 1301 return (NULL); 1302 } 1303 if (locked_tcb) { 1304 /* 1305 * UN-lock so we can do proper locking here this occurs when 1306 * called from load_addresses_from_init. 1307 */ 1308 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1309 SCTP_TCB_UNLOCK(locked_tcb); 1310 } 1311 SCTP_INP_INFO_RLOCK(); 1312 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1313 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1314 /*- 1315 * Now either this guy is our listener or it's the 1316 * connector. If it is the one that issued the connect, then 1317 * it's only chance is to be the first TCB in the list. If 1318 * it is the acceptor, then do the special_lookup to hash 1319 * and find the real inp. 1320 */ 1321 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1322 /* to is peer addr, from is my addr */ 1323 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1324 netp, inp->def_vrf_id); 1325 if ((stcb != NULL) && (locked_tcb == NULL)) { 1326 /* we have a locked tcb, lower refcount */ 1327 SCTP_INP_DECR_REF(inp); 1328 } 1329 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1330 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1331 SCTP_TCB_LOCK(locked_tcb); 1332 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1333 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1334 } 1335 SCTP_INP_INFO_RUNLOCK(); 1336 return (stcb); 1337 } else { 1338 SCTP_INP_WLOCK(inp); 1339 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1340 goto null_return; 1341 } 1342 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1343 if (stcb == NULL) { 1344 goto null_return; 1345 } 1346 SCTP_TCB_LOCK(stcb); 1347 1348 if (stcb->rport != rport) { 1349 /* remote port does not match. */ 1350 SCTP_TCB_UNLOCK(stcb); 1351 goto null_return; 1352 } 1353 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1354 SCTP_TCB_UNLOCK(stcb); 1355 goto null_return; 1356 } 1357 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1358 SCTP_TCB_UNLOCK(stcb); 1359 goto null_return; 1360 } 1361 /* now look at the list of remote addresses */ 1362 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1363 #ifdef INVARIANTS 1364 if (net == (TAILQ_NEXT(net, sctp_next))) { 1365 panic("Corrupt net list"); 1366 } 1367 #endif 1368 if (net->ro._l_addr.sa.sa_family != 1369 remote->sa_family) { 1370 /* not the same family */ 1371 continue; 1372 } 1373 switch (remote->sa_family) { 1374 #ifdef INET 1375 case AF_INET: 1376 { 1377 struct sockaddr_in *sin, 1378 *rsin; 1379 1380 sin = (struct sockaddr_in *) 1381 &net->ro._l_addr; 1382 rsin = (struct sockaddr_in *)remote; 1383 if (sin->sin_addr.s_addr == 1384 rsin->sin_addr.s_addr) { 1385 /* found it */ 1386 if (netp != NULL) { 1387 *netp = net; 1388 } 1389 if (locked_tcb == NULL) { 1390 SCTP_INP_DECR_REF(inp); 1391 } else if (locked_tcb != stcb) { 1392 SCTP_TCB_LOCK(locked_tcb); 1393 } 1394 if (locked_tcb) { 1395 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1396 } 1397 1398 SCTP_INP_WUNLOCK(inp); 1399 SCTP_INP_INFO_RUNLOCK(); 1400 return (stcb); 1401 } 1402 break; 1403 } 1404 #endif 1405 #ifdef INET6 1406 case AF_INET6: 1407 { 1408 struct sockaddr_in6 *sin6, 1409 *rsin6; 1410 1411 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1412 rsin6 = (struct sockaddr_in6 *)remote; 1413 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1414 rsin6)) { 1415 /* found it */ 1416 if (netp != NULL) { 1417 *netp = net; 1418 } 1419 if (locked_tcb == NULL) { 1420 SCTP_INP_DECR_REF(inp); 1421 } else if (locked_tcb != stcb) { 1422 SCTP_TCB_LOCK(locked_tcb); 1423 } 1424 if (locked_tcb) { 1425 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1426 } 1427 SCTP_INP_WUNLOCK(inp); 1428 SCTP_INP_INFO_RUNLOCK(); 1429 return (stcb); 1430 } 1431 break; 1432 } 1433 #endif 1434 default: 1435 /* TSNH */ 1436 break; 1437 } 1438 } 1439 SCTP_TCB_UNLOCK(stcb); 1440 } 1441 } else { 1442 SCTP_INP_WLOCK(inp); 1443 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1444 goto null_return; 1445 } 1446 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1447 inp->sctp_hashmark)]; 1448 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1449 if (stcb->rport != rport) { 1450 /* remote port does not match */ 1451 continue; 1452 } 1453 SCTP_TCB_LOCK(stcb); 1454 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1455 SCTP_TCB_UNLOCK(stcb); 1456 continue; 1457 } 1458 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1459 SCTP_TCB_UNLOCK(stcb); 1460 continue; 1461 } 1462 /* now look at the list of remote addresses */ 1463 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1464 #ifdef INVARIANTS 1465 if (net == (TAILQ_NEXT(net, sctp_next))) { 1466 panic("Corrupt net list"); 1467 } 1468 #endif 1469 if (net->ro._l_addr.sa.sa_family != 1470 remote->sa_family) { 1471 /* not the same family */ 1472 continue; 1473 } 1474 switch (remote->sa_family) { 1475 #ifdef INET 1476 case AF_INET: 1477 { 1478 struct sockaddr_in *sin, 1479 *rsin; 1480 1481 sin = (struct sockaddr_in *) 1482 &net->ro._l_addr; 1483 rsin = (struct sockaddr_in *)remote; 1484 if (sin->sin_addr.s_addr == 1485 rsin->sin_addr.s_addr) { 1486 /* found it */ 1487 if (netp != NULL) { 1488 *netp = net; 1489 } 1490 if (locked_tcb == NULL) { 1491 SCTP_INP_DECR_REF(inp); 1492 } else if (locked_tcb != stcb) { 1493 SCTP_TCB_LOCK(locked_tcb); 1494 } 1495 if (locked_tcb) { 1496 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1497 } 1498 SCTP_INP_WUNLOCK(inp); 1499 SCTP_INP_INFO_RUNLOCK(); 1500 return (stcb); 1501 } 1502 break; 1503 } 1504 #endif 1505 #ifdef INET6 1506 case AF_INET6: 1507 { 1508 struct sockaddr_in6 *sin6, 1509 *rsin6; 1510 1511 sin6 = (struct sockaddr_in6 *) 1512 &net->ro._l_addr; 1513 rsin6 = (struct sockaddr_in6 *)remote; 1514 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1515 rsin6)) { 1516 /* found it */ 1517 if (netp != NULL) { 1518 *netp = net; 1519 } 1520 if (locked_tcb == NULL) { 1521 SCTP_INP_DECR_REF(inp); 1522 } else if (locked_tcb != stcb) { 1523 SCTP_TCB_LOCK(locked_tcb); 1524 } 1525 if (locked_tcb) { 1526 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1527 } 1528 SCTP_INP_WUNLOCK(inp); 1529 SCTP_INP_INFO_RUNLOCK(); 1530 return (stcb); 1531 } 1532 break; 1533 } 1534 #endif 1535 default: 1536 /* TSNH */ 1537 break; 1538 } 1539 } 1540 SCTP_TCB_UNLOCK(stcb); 1541 } 1542 } 1543 null_return: 1544 /* clean up for returning null */ 1545 if (locked_tcb) { 1546 SCTP_TCB_LOCK(locked_tcb); 1547 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1548 } 1549 SCTP_INP_WUNLOCK(inp); 1550 SCTP_INP_INFO_RUNLOCK(); 1551 /* not found */ 1552 return (NULL); 1553 } 1554 1555 1556 /* 1557 * Find an association for a specific endpoint using the association id given 1558 * out in the COMM_UP notification 1559 */ 1560 struct sctp_tcb * 1561 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1562 { 1563 /* 1564 * Use my the assoc_id to find a endpoint 1565 */ 1566 struct sctpasochead *head; 1567 struct sctp_tcb *stcb; 1568 uint32_t id; 1569 1570 if (inp == NULL) { 1571 SCTP_PRINTF("TSNH ep_associd\n"); 1572 return (NULL); 1573 } 1574 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1575 SCTP_PRINTF("TSNH ep_associd0\n"); 1576 return (NULL); 1577 } 1578 id = (uint32_t)asoc_id; 1579 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1580 if (head == NULL) { 1581 /* invalid id TSNH */ 1582 SCTP_PRINTF("TSNH ep_associd1\n"); 1583 return (NULL); 1584 } 1585 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1586 if (stcb->asoc.assoc_id == id) { 1587 if (inp != stcb->sctp_ep) { 1588 /* 1589 * some other guy has the same id active (id 1590 * collision ??). 1591 */ 1592 SCTP_PRINTF("TSNH ep_associd2\n"); 1593 continue; 1594 } 1595 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1596 continue; 1597 } 1598 if (want_lock) { 1599 SCTP_TCB_LOCK(stcb); 1600 } 1601 return (stcb); 1602 } 1603 } 1604 return (NULL); 1605 } 1606 1607 1608 struct sctp_tcb * 1609 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1610 { 1611 struct sctp_tcb *stcb; 1612 1613 SCTP_INP_RLOCK(inp); 1614 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1615 SCTP_INP_RUNLOCK(inp); 1616 return (stcb); 1617 } 1618 1619 1620 /* 1621 * Endpoint probe expects that the INP_INFO is locked. 1622 */ 1623 static struct sctp_inpcb * 1624 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1625 uint16_t lport, uint32_t vrf_id) 1626 { 1627 struct sctp_inpcb *inp; 1628 struct sctp_laddr *laddr; 1629 #ifdef INET 1630 struct sockaddr_in *sin; 1631 #endif 1632 #ifdef INET6 1633 struct sockaddr_in6 *sin6; 1634 struct sockaddr_in6 *intf_addr6; 1635 #endif 1636 int fnd; 1637 1638 #ifdef INET 1639 sin = NULL; 1640 #endif 1641 #ifdef INET6 1642 sin6 = NULL; 1643 #endif 1644 switch (nam->sa_family) { 1645 #ifdef INET 1646 case AF_INET: 1647 sin = (struct sockaddr_in *)nam; 1648 break; 1649 #endif 1650 #ifdef INET6 1651 case AF_INET6: 1652 sin6 = (struct sockaddr_in6 *)nam; 1653 break; 1654 #endif 1655 default: 1656 /* unsupported family */ 1657 return (NULL); 1658 } 1659 1660 if (head == NULL) 1661 return (NULL); 1662 1663 LIST_FOREACH(inp, head, sctp_hash) { 1664 SCTP_INP_RLOCK(inp); 1665 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1666 SCTP_INP_RUNLOCK(inp); 1667 continue; 1668 } 1669 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1670 (inp->sctp_lport == lport)) { 1671 /* got it */ 1672 switch (nam->sa_family) { 1673 #ifdef INET 1674 case AF_INET: 1675 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1676 SCTP_IPV6_V6ONLY(inp)) { 1677 /* 1678 * IPv4 on a IPv6 socket with ONLY 1679 * IPv6 set 1680 */ 1681 SCTP_INP_RUNLOCK(inp); 1682 continue; 1683 } 1684 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1685 &sin->sin_addr) != 0) { 1686 SCTP_INP_RUNLOCK(inp); 1687 continue; 1688 } 1689 break; 1690 #endif 1691 #ifdef INET6 1692 case AF_INET6: 1693 /* 1694 * A V6 address and the endpoint is NOT 1695 * bound V6 1696 */ 1697 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1698 SCTP_INP_RUNLOCK(inp); 1699 continue; 1700 } 1701 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1702 &sin6->sin6_addr) != 0) { 1703 SCTP_INP_RUNLOCK(inp); 1704 continue; 1705 } 1706 break; 1707 #endif 1708 default: 1709 break; 1710 } 1711 /* does a VRF id match? */ 1712 fnd = 0; 1713 if (inp->def_vrf_id == vrf_id) 1714 fnd = 1; 1715 1716 SCTP_INP_RUNLOCK(inp); 1717 if (!fnd) 1718 continue; 1719 return (inp); 1720 } 1721 SCTP_INP_RUNLOCK(inp); 1722 } 1723 switch (nam->sa_family) { 1724 #ifdef INET 1725 case AF_INET: 1726 if (sin->sin_addr.s_addr == INADDR_ANY) { 1727 /* Can't hunt for one that has no address specified */ 1728 return (NULL); 1729 } 1730 break; 1731 #endif 1732 #ifdef INET6 1733 case AF_INET6: 1734 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1735 /* Can't hunt for one that has no address specified */ 1736 return (NULL); 1737 } 1738 break; 1739 #endif 1740 default: 1741 break; 1742 } 1743 /* 1744 * ok, not bound to all so see if we can find a EP bound to this 1745 * address. 1746 */ 1747 LIST_FOREACH(inp, head, sctp_hash) { 1748 SCTP_INP_RLOCK(inp); 1749 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1750 SCTP_INP_RUNLOCK(inp); 1751 continue; 1752 } 1753 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1754 SCTP_INP_RUNLOCK(inp); 1755 continue; 1756 } 1757 /* 1758 * Ok this could be a likely candidate, look at all of its 1759 * addresses 1760 */ 1761 if (inp->sctp_lport != lport) { 1762 SCTP_INP_RUNLOCK(inp); 1763 continue; 1764 } 1765 /* does a VRF id match? */ 1766 fnd = 0; 1767 if (inp->def_vrf_id == vrf_id) 1768 fnd = 1; 1769 1770 if (!fnd) { 1771 SCTP_INP_RUNLOCK(inp); 1772 continue; 1773 } 1774 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1775 if (laddr->ifa == NULL) { 1776 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1777 __func__); 1778 continue; 1779 } 1780 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1781 (void *)laddr->ifa); 1782 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1783 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1784 continue; 1785 } 1786 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1787 /* possible, see if it matches */ 1788 switch (nam->sa_family) { 1789 #ifdef INET 1790 case AF_INET: 1791 if (sin->sin_addr.s_addr == 1792 laddr->ifa->address.sin.sin_addr.s_addr) { 1793 SCTP_INP_RUNLOCK(inp); 1794 return (inp); 1795 } 1796 break; 1797 #endif 1798 #ifdef INET6 1799 case AF_INET6: 1800 intf_addr6 = &laddr->ifa->address.sin6; 1801 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1802 intf_addr6)) { 1803 SCTP_INP_RUNLOCK(inp); 1804 return (inp); 1805 } 1806 break; 1807 #endif 1808 } 1809 } 1810 } 1811 SCTP_INP_RUNLOCK(inp); 1812 } 1813 return (NULL); 1814 } 1815 1816 1817 static struct sctp_inpcb * 1818 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1819 { 1820 struct sctppcbhead *head; 1821 struct sctp_inpcb *t_inp; 1822 int fnd; 1823 1824 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1825 SCTP_BASE_INFO(hashmark))]; 1826 LIST_FOREACH(t_inp, head, sctp_hash) { 1827 if (t_inp->sctp_lport != lport) { 1828 continue; 1829 } 1830 /* is it in the VRF in question */ 1831 fnd = 0; 1832 if (t_inp->def_vrf_id == vrf_id) 1833 fnd = 1; 1834 if (!fnd) 1835 continue; 1836 1837 /* This one is in use. */ 1838 /* check the v6/v4 binding issue */ 1839 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1840 SCTP_IPV6_V6ONLY(t_inp)) { 1841 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1842 /* collision in V6 space */ 1843 return (t_inp); 1844 } else { 1845 /* inp is BOUND_V4 no conflict */ 1846 continue; 1847 } 1848 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1849 /* t_inp is bound v4 and v6, conflict always */ 1850 return (t_inp); 1851 } else { 1852 /* t_inp is bound only V4 */ 1853 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1854 SCTP_IPV6_V6ONLY(inp)) { 1855 /* no conflict */ 1856 continue; 1857 } 1858 /* else fall through to conflict */ 1859 } 1860 return (t_inp); 1861 } 1862 return (NULL); 1863 } 1864 1865 1866 int 1867 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1868 { 1869 /* For 1-2-1 with port reuse */ 1870 struct sctppcbhead *head; 1871 struct sctp_inpcb *tinp, *ninp; 1872 1873 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1874 /* only works with port reuse on */ 1875 return (-1); 1876 } 1877 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1878 return (0); 1879 } 1880 SCTP_INP_RUNLOCK(inp); 1881 SCTP_INP_INFO_WLOCK(); 1882 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1883 SCTP_BASE_INFO(hashmark))]; 1884 /* Kick out all non-listeners to the TCP hash */ 1885 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1886 if (tinp->sctp_lport != inp->sctp_lport) { 1887 continue; 1888 } 1889 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1890 continue; 1891 } 1892 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1893 continue; 1894 } 1895 if (SCTP_IS_LISTENING(tinp)) { 1896 continue; 1897 } 1898 SCTP_INP_WLOCK(tinp); 1899 LIST_REMOVE(tinp, sctp_hash); 1900 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1901 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1902 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1903 SCTP_INP_WUNLOCK(tinp); 1904 } 1905 SCTP_INP_WLOCK(inp); 1906 /* Pull from where he was */ 1907 LIST_REMOVE(inp, sctp_hash); 1908 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1909 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1910 LIST_INSERT_HEAD(head, inp, sctp_hash); 1911 SCTP_INP_WUNLOCK(inp); 1912 SCTP_INP_RLOCK(inp); 1913 SCTP_INP_INFO_WUNLOCK(); 1914 return (0); 1915 } 1916 1917 1918 struct sctp_inpcb * 1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1920 uint32_t vrf_id) 1921 { 1922 /* 1923 * First we check the hash table to see if someone has this port 1924 * bound with just the port. 1925 */ 1926 struct sctp_inpcb *inp; 1927 struct sctppcbhead *head; 1928 int lport; 1929 unsigned int i; 1930 #ifdef INET 1931 struct sockaddr_in *sin; 1932 #endif 1933 #ifdef INET6 1934 struct sockaddr_in6 *sin6; 1935 #endif 1936 1937 switch (nam->sa_family) { 1938 #ifdef INET 1939 case AF_INET: 1940 sin = (struct sockaddr_in *)nam; 1941 lport = sin->sin_port; 1942 break; 1943 #endif 1944 #ifdef INET6 1945 case AF_INET6: 1946 sin6 = (struct sockaddr_in6 *)nam; 1947 lport = sin6->sin6_port; 1948 break; 1949 #endif 1950 default: 1951 return (NULL); 1952 } 1953 /* 1954 * I could cheat here and just cast to one of the types but we will 1955 * do it right. It also provides the check against an Unsupported 1956 * type too. 1957 */ 1958 /* Find the head of the ALLADDR chain */ 1959 if (have_lock == 0) { 1960 SCTP_INP_INFO_RLOCK(); 1961 } 1962 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1963 SCTP_BASE_INFO(hashmark))]; 1964 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1965 1966 /* 1967 * If the TCP model exists it could be that the main listening 1968 * endpoint is gone but there still exists a connected socket for 1969 * this guy. If so we can return the first one that we find. This 1970 * may NOT be the correct one so the caller should be wary on the 1971 * returned INP. Currently the only caller that sets find_tcp_pool 1972 * is in bindx where we are verifying that a user CAN bind the 1973 * address. He either has bound it already, or someone else has, or 1974 * its open to bind, so this is good enough. 1975 */ 1976 if (inp == NULL && find_tcp_pool) { 1977 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1978 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1979 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1980 if (inp) { 1981 break; 1982 } 1983 } 1984 } 1985 if (inp) { 1986 SCTP_INP_INCR_REF(inp); 1987 } 1988 if (have_lock == 0) { 1989 SCTP_INP_INFO_RUNLOCK(); 1990 } 1991 return (inp); 1992 } 1993 1994 1995 /* 1996 * Find an association for an endpoint with the pointer to whom you want to 1997 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1998 * need to change the *to to some other struct like a mbuf... 1999 */ 2000 struct sctp_tcb * 2001 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2002 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2003 uint32_t vrf_id) 2004 { 2005 struct sctp_inpcb *inp = NULL; 2006 struct sctp_tcb *stcb; 2007 2008 SCTP_INP_INFO_RLOCK(); 2009 if (find_tcp_pool) { 2010 if (inp_p != NULL) { 2011 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2012 vrf_id); 2013 } else { 2014 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2015 vrf_id); 2016 } 2017 if (stcb != NULL) { 2018 SCTP_INP_INFO_RUNLOCK(); 2019 return (stcb); 2020 } 2021 } 2022 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2023 if (inp_p != NULL) { 2024 *inp_p = inp; 2025 } 2026 SCTP_INP_INFO_RUNLOCK(); 2027 if (inp == NULL) { 2028 return (NULL); 2029 } 2030 /* 2031 * ok, we have an endpoint, now lets find the assoc for it (if any) 2032 * we now place the source address or from in the to of the find 2033 * endpoint call. Since in reality this chain is used from the 2034 * inbound packet side. 2035 */ 2036 if (inp_p != NULL) { 2037 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2038 NULL); 2039 } else { 2040 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2041 NULL); 2042 } 2043 return (stcb); 2044 } 2045 2046 2047 /* 2048 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2049 * find all addresses that the sender has specified in any address list. Each 2050 * address will be used to lookup the TCB and see if one exits. 2051 */ 2052 static struct sctp_tcb * 2053 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2054 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2055 struct sockaddr *dst) 2056 { 2057 struct sctp_paramhdr *phdr, param_buf; 2058 #if defined(INET) || defined(INET6) 2059 struct sctp_tcb *stcb; 2060 uint16_t ptype; 2061 #endif 2062 uint16_t plen; 2063 #ifdef INET 2064 struct sockaddr_in sin4; 2065 #endif 2066 #ifdef INET6 2067 struct sockaddr_in6 sin6; 2068 #endif 2069 2070 #ifdef INET 2071 memset(&sin4, 0, sizeof(sin4)); 2072 sin4.sin_len = sizeof(sin4); 2073 sin4.sin_family = AF_INET; 2074 sin4.sin_port = sh->src_port; 2075 #endif 2076 #ifdef INET6 2077 memset(&sin6, 0, sizeof(sin6)); 2078 sin6.sin6_len = sizeof(sin6); 2079 sin6.sin6_family = AF_INET6; 2080 sin6.sin6_port = sh->src_port; 2081 #endif 2082 2083 offset += sizeof(struct sctp_init_chunk); 2084 2085 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2086 while (phdr != NULL) { 2087 /* now we must see if we want the parameter */ 2088 #if defined(INET) || defined(INET6) 2089 ptype = ntohs(phdr->param_type); 2090 #endif 2091 plen = ntohs(phdr->param_length); 2092 if (plen == 0) { 2093 break; 2094 } 2095 #ifdef INET 2096 if (ptype == SCTP_IPV4_ADDRESS && 2097 plen == sizeof(struct sctp_ipv4addr_param)) { 2098 /* Get the rest of the address */ 2099 struct sctp_ipv4addr_param ip4_param, *p4; 2100 2101 phdr = sctp_get_next_param(m, offset, 2102 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2103 if (phdr == NULL) { 2104 return (NULL); 2105 } 2106 p4 = (struct sctp_ipv4addr_param *)phdr; 2107 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2108 /* look it up */ 2109 stcb = sctp_findassociation_ep_addr(inp_p, 2110 (struct sockaddr *)&sin4, netp, dst, NULL); 2111 if (stcb != NULL) { 2112 return (stcb); 2113 } 2114 } 2115 #endif 2116 #ifdef INET6 2117 if (ptype == SCTP_IPV6_ADDRESS && 2118 plen == sizeof(struct sctp_ipv6addr_param)) { 2119 /* Get the rest of the address */ 2120 struct sctp_ipv6addr_param ip6_param, *p6; 2121 2122 phdr = sctp_get_next_param(m, offset, 2123 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2124 if (phdr == NULL) { 2125 return (NULL); 2126 } 2127 p6 = (struct sctp_ipv6addr_param *)phdr; 2128 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2129 /* look it up */ 2130 stcb = sctp_findassociation_ep_addr(inp_p, 2131 (struct sockaddr *)&sin6, netp, dst, NULL); 2132 if (stcb != NULL) { 2133 return (stcb); 2134 } 2135 } 2136 #endif 2137 offset += SCTP_SIZE32(plen); 2138 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2139 sizeof(param_buf)); 2140 } 2141 return (NULL); 2142 } 2143 2144 static struct sctp_tcb * 2145 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2146 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2147 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2148 { 2149 /* 2150 * Use my vtag to hash. If we find it we then verify the source addr 2151 * is in the assoc. If all goes well we save a bit on rec of a 2152 * packet. 2153 */ 2154 struct sctpasochead *head; 2155 struct sctp_nets *net; 2156 struct sctp_tcb *stcb; 2157 2158 SCTP_INP_INFO_RLOCK(); 2159 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2160 SCTP_BASE_INFO(hashasocmark))]; 2161 LIST_FOREACH(stcb, head, sctp_asocs) { 2162 SCTP_INP_RLOCK(stcb->sctp_ep); 2163 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2164 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2165 continue; 2166 } 2167 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2168 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2169 continue; 2170 } 2171 SCTP_TCB_LOCK(stcb); 2172 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2173 if (stcb->asoc.my_vtag == vtag) { 2174 /* candidate */ 2175 if (stcb->rport != rport) { 2176 SCTP_TCB_UNLOCK(stcb); 2177 continue; 2178 } 2179 if (stcb->sctp_ep->sctp_lport != lport) { 2180 SCTP_TCB_UNLOCK(stcb); 2181 continue; 2182 } 2183 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2184 SCTP_TCB_UNLOCK(stcb); 2185 continue; 2186 } 2187 /* RRS:Need toaddr check here */ 2188 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2189 /* Endpoint does not own this address */ 2190 SCTP_TCB_UNLOCK(stcb); 2191 continue; 2192 } 2193 if (remote_tag) { 2194 /* 2195 * If we have both vtags that's all we match 2196 * on 2197 */ 2198 if (stcb->asoc.peer_vtag == remote_tag) { 2199 /* 2200 * If both tags match we consider it 2201 * conclusive and check NO 2202 * source/destination addresses 2203 */ 2204 goto conclusive; 2205 } 2206 } 2207 if (skip_src_check) { 2208 conclusive: 2209 if (from) { 2210 *netp = sctp_findnet(stcb, from); 2211 } else { 2212 *netp = NULL; /* unknown */ 2213 } 2214 if (inp_p) 2215 *inp_p = stcb->sctp_ep; 2216 SCTP_INP_INFO_RUNLOCK(); 2217 return (stcb); 2218 } 2219 net = sctp_findnet(stcb, from); 2220 if (net) { 2221 /* yep its him. */ 2222 *netp = net; 2223 SCTP_STAT_INCR(sctps_vtagexpress); 2224 *inp_p = stcb->sctp_ep; 2225 SCTP_INP_INFO_RUNLOCK(); 2226 return (stcb); 2227 } else { 2228 /* 2229 * not him, this should only happen in rare 2230 * cases so I peg it. 2231 */ 2232 SCTP_STAT_INCR(sctps_vtagbogus); 2233 } 2234 } 2235 SCTP_TCB_UNLOCK(stcb); 2236 } 2237 SCTP_INP_INFO_RUNLOCK(); 2238 return (NULL); 2239 } 2240 2241 2242 /* 2243 * Find an association with the pointer to the inbound IP packet. This can be 2244 * a IPv4 or IPv6 packet. 2245 */ 2246 struct sctp_tcb * 2247 sctp_findassociation_addr(struct mbuf *m, int offset, 2248 struct sockaddr *src, struct sockaddr *dst, 2249 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2250 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2251 { 2252 struct sctp_tcb *stcb; 2253 struct sctp_inpcb *inp; 2254 2255 if (sh->v_tag) { 2256 /* we only go down this path if vtag is non-zero */ 2257 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2258 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2259 if (stcb) { 2260 return (stcb); 2261 } 2262 } 2263 2264 if (inp_p) { 2265 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2266 1, vrf_id); 2267 inp = *inp_p; 2268 } else { 2269 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2270 1, vrf_id); 2271 } 2272 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2273 if (stcb == NULL && inp) { 2274 /* Found a EP but not this address */ 2275 if ((ch->chunk_type == SCTP_INITIATION) || 2276 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2277 /*- 2278 * special hook, we do NOT return linp or an 2279 * association that is linked to an existing 2280 * association that is under the TCP pool (i.e. no 2281 * listener exists). The endpoint finding routine 2282 * will always find a listener before examining the 2283 * TCP pool. 2284 */ 2285 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2286 if (inp_p) { 2287 *inp_p = NULL; 2288 } 2289 return (NULL); 2290 } 2291 stcb = sctp_findassociation_special_addr(m, 2292 offset, sh, &inp, netp, dst); 2293 if (inp_p != NULL) { 2294 *inp_p = inp; 2295 } 2296 } 2297 } 2298 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2299 return (stcb); 2300 } 2301 2302 /* 2303 * lookup an association by an ASCONF lookup address. 2304 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2305 */ 2306 struct sctp_tcb * 2307 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2308 struct sockaddr *dst, struct sctphdr *sh, 2309 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2310 { 2311 struct sctp_tcb *stcb; 2312 union sctp_sockstore remote_store; 2313 struct sctp_paramhdr param_buf, *phdr; 2314 int ptype; 2315 int zero_address = 0; 2316 #ifdef INET 2317 struct sockaddr_in *sin; 2318 #endif 2319 #ifdef INET6 2320 struct sockaddr_in6 *sin6; 2321 #endif 2322 2323 memset(&remote_store, 0, sizeof(remote_store)); 2324 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2325 ¶m_buf, sizeof(struct sctp_paramhdr)); 2326 if (phdr == NULL) { 2327 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2328 __func__); 2329 return NULL; 2330 } 2331 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2332 /* get the correlation address */ 2333 switch (ptype) { 2334 #ifdef INET6 2335 case SCTP_IPV6_ADDRESS: 2336 { 2337 /* ipv6 address param */ 2338 struct sctp_ipv6addr_param *p6, p6_buf; 2339 2340 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2341 return NULL; 2342 } 2343 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2344 offset + sizeof(struct sctp_asconf_chunk), 2345 &p6_buf.ph, sizeof(p6_buf)); 2346 if (p6 == NULL) { 2347 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2348 __func__); 2349 return (NULL); 2350 } 2351 sin6 = &remote_store.sin6; 2352 sin6->sin6_family = AF_INET6; 2353 sin6->sin6_len = sizeof(*sin6); 2354 sin6->sin6_port = sh->src_port; 2355 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2356 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2357 zero_address = 1; 2358 break; 2359 } 2360 #endif 2361 #ifdef INET 2362 case SCTP_IPV4_ADDRESS: 2363 { 2364 /* ipv4 address param */ 2365 struct sctp_ipv4addr_param *p4, p4_buf; 2366 2367 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2368 return NULL; 2369 } 2370 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2371 offset + sizeof(struct sctp_asconf_chunk), 2372 &p4_buf.ph, sizeof(p4_buf)); 2373 if (p4 == NULL) { 2374 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2375 __func__); 2376 return (NULL); 2377 } 2378 sin = &remote_store.sin; 2379 sin->sin_family = AF_INET; 2380 sin->sin_len = sizeof(*sin); 2381 sin->sin_port = sh->src_port; 2382 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2383 if (sin->sin_addr.s_addr == INADDR_ANY) 2384 zero_address = 1; 2385 break; 2386 } 2387 #endif 2388 default: 2389 /* invalid address param type */ 2390 return NULL; 2391 } 2392 2393 if (zero_address) { 2394 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2395 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2396 if (stcb != NULL) { 2397 SCTP_INP_DECR_REF(*inp_p); 2398 } 2399 } else { 2400 stcb = sctp_findassociation_ep_addr(inp_p, 2401 &remote_store.sa, netp, 2402 dst, NULL); 2403 } 2404 return (stcb); 2405 } 2406 2407 2408 /* 2409 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2410 * addresses. This way if we don't get a bind we by default pick a ephemeral 2411 * port with all addresses bound. 2412 */ 2413 int 2414 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2415 { 2416 /* 2417 * we get called when a new endpoint starts up. We need to allocate 2418 * the sctp_inpcb structure from the zone and init it. Mark it as 2419 * unbound and find a port that we can use as an ephemeral with 2420 * INADDR_ANY. If the user binds later no problem we can then add in 2421 * the specific addresses. And setup the default parameters for the 2422 * EP. 2423 */ 2424 int i, error; 2425 struct sctp_inpcb *inp; 2426 struct sctp_pcb *m; 2427 struct timeval time; 2428 sctp_sharedkey_t *null_key; 2429 2430 error = 0; 2431 2432 SCTP_INP_INFO_WLOCK(); 2433 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2434 if (inp == NULL) { 2435 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2436 SCTP_INP_INFO_WUNLOCK(); 2437 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2438 return (ENOBUFS); 2439 } 2440 /* zap it */ 2441 memset(inp, 0, sizeof(*inp)); 2442 2443 /* bump generations */ 2444 /* setup socket pointers */ 2445 inp->sctp_socket = so; 2446 inp->ip_inp.inp.inp_socket = so; 2447 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2448 #ifdef INET6 2449 if (INP_SOCKAF(so) == AF_INET6) { 2450 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2451 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2452 } 2453 if (MODULE_GLOBAL(ip6_v6only)) { 2454 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2455 } 2456 } 2457 #endif 2458 inp->sctp_associd_counter = 1; 2459 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2460 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2461 inp->max_cwnd = 0; 2462 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2463 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2464 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2465 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2466 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2467 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2468 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2469 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2470 inp->idata_supported = 0; 2471 2472 inp->fibnum = so->so_fibnum; 2473 /* init the small hash table we use to track asocid <-> tcb */ 2474 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2475 if (inp->sctp_asocidhash == NULL) { 2476 crfree(inp->ip_inp.inp.inp_cred); 2477 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2478 SCTP_INP_INFO_WUNLOCK(); 2479 return (ENOBUFS); 2480 } 2481 SCTP_INCR_EP_COUNT(); 2482 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2483 SCTP_INP_INFO_WUNLOCK(); 2484 2485 so->so_pcb = (caddr_t)inp; 2486 2487 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2488 /* UDP style socket */ 2489 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2490 SCTP_PCB_FLAGS_UNBOUND); 2491 /* Be sure it is NON-BLOCKING IO for UDP */ 2492 /* SCTP_SET_SO_NBIO(so); */ 2493 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2494 /* TCP style socket */ 2495 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2496 SCTP_PCB_FLAGS_UNBOUND); 2497 /* Be sure we have blocking IO by default */ 2498 SOCK_LOCK(so); 2499 SCTP_CLEAR_SO_NBIO(so); 2500 SOCK_UNLOCK(so); 2501 } else { 2502 /* 2503 * unsupported socket type (RAW, etc)- in case we missed it 2504 * in protosw 2505 */ 2506 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2507 so->so_pcb = NULL; 2508 crfree(inp->ip_inp.inp.inp_cred); 2509 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2510 return (EOPNOTSUPP); 2511 } 2512 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2513 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2514 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2515 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2516 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2517 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2518 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2519 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2520 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2521 } 2522 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2523 &inp->sctp_hashmark); 2524 if (inp->sctp_tcbhash == NULL) { 2525 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2526 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2527 so->so_pcb = NULL; 2528 crfree(inp->ip_inp.inp.inp_cred); 2529 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2530 return (ENOBUFS); 2531 } 2532 inp->def_vrf_id = vrf_id; 2533 2534 SCTP_INP_INFO_WLOCK(); 2535 SCTP_INP_LOCK_INIT(inp); 2536 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2537 SCTP_INP_READ_INIT(inp); 2538 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2539 /* lock the new ep */ 2540 SCTP_INP_WLOCK(inp); 2541 2542 /* add it to the info area */ 2543 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2544 SCTP_INP_INFO_WUNLOCK(); 2545 2546 TAILQ_INIT(&inp->read_queue); 2547 LIST_INIT(&inp->sctp_addr_list); 2548 2549 LIST_INIT(&inp->sctp_asoc_list); 2550 2551 #ifdef SCTP_TRACK_FREED_ASOCS 2552 /* TEMP CODE */ 2553 LIST_INIT(&inp->sctp_asoc_free_list); 2554 #endif 2555 /* Init the timer structure for signature change */ 2556 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2557 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2558 2559 /* now init the actual endpoint default data */ 2560 m = &inp->sctp_ep; 2561 2562 /* setup the base timeout information */ 2563 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2564 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2565 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2566 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2567 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2568 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2569 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2570 /* all max/min max are in ms */ 2571 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2572 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2573 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2574 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2575 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2576 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2577 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2578 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2579 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2580 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2581 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2582 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2583 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2584 2585 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2586 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2587 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2588 /* number of streams to pre-open on a association */ 2589 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2590 2591 m->default_mtu = 0; 2592 /* Add adaptation cookie */ 2593 m->adaptation_layer_indicator = 0; 2594 m->adaptation_layer_indicator_provided = 0; 2595 2596 /* seed random number generator */ 2597 m->random_counter = 1; 2598 m->store_at = SCTP_SIGNATURE_SIZE; 2599 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2600 sctp_fill_random_store(m); 2601 2602 /* Minimum cookie size */ 2603 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2604 sizeof(struct sctp_state_cookie); 2605 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2606 2607 /* Setup the initial secret */ 2608 (void)SCTP_GETTIME_TIMEVAL(&time); 2609 m->time_of_secret_change = time.tv_sec; 2610 2611 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2612 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2613 } 2614 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2615 2616 /* How long is a cookie good for ? */ 2617 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2618 /* 2619 * Initialize authentication parameters 2620 */ 2621 m->local_hmacs = sctp_default_supported_hmaclist(); 2622 m->local_auth_chunks = sctp_alloc_chunklist(); 2623 if (inp->asconf_supported) { 2624 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2625 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2626 } 2627 m->default_dscp = 0; 2628 #ifdef INET6 2629 m->default_flowlabel = 0; 2630 #endif 2631 m->port = 0; /* encapsulation disabled by default */ 2632 LIST_INIT(&m->shared_keys); 2633 /* add default NULL key as key id 0 */ 2634 null_key = sctp_alloc_sharedkey(); 2635 sctp_insert_sharedkey(&m->shared_keys, null_key); 2636 SCTP_INP_WUNLOCK(inp); 2637 #ifdef SCTP_LOG_CLOSING 2638 sctp_log_closing(inp, NULL, 12); 2639 #endif 2640 return (error); 2641 } 2642 2643 2644 void 2645 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2646 struct sctp_tcb *stcb) 2647 { 2648 struct sctp_nets *net; 2649 uint16_t lport, rport; 2650 struct sctppcbhead *head; 2651 struct sctp_laddr *laddr, *oladdr; 2652 2653 atomic_add_int(&stcb->asoc.refcnt, 1); 2654 SCTP_TCB_UNLOCK(stcb); 2655 SCTP_INP_INFO_WLOCK(); 2656 SCTP_INP_WLOCK(old_inp); 2657 SCTP_INP_WLOCK(new_inp); 2658 SCTP_TCB_LOCK(stcb); 2659 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2660 2661 new_inp->sctp_ep.time_of_secret_change = 2662 old_inp->sctp_ep.time_of_secret_change; 2663 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2664 sizeof(old_inp->sctp_ep.secret_key)); 2665 new_inp->sctp_ep.current_secret_number = 2666 old_inp->sctp_ep.current_secret_number; 2667 new_inp->sctp_ep.last_secret_number = 2668 old_inp->sctp_ep.last_secret_number; 2669 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2670 2671 /* make it so new data pours into the new socket */ 2672 stcb->sctp_socket = new_inp->sctp_socket; 2673 stcb->sctp_ep = new_inp; 2674 2675 /* Copy the port across */ 2676 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2677 rport = stcb->rport; 2678 /* Pull the tcb from the old association */ 2679 LIST_REMOVE(stcb, sctp_tcbhash); 2680 LIST_REMOVE(stcb, sctp_tcblist); 2681 if (stcb->asoc.in_asocid_hash) { 2682 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2683 } 2684 /* Now insert the new_inp into the TCP connected hash */ 2685 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2686 2687 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2688 /* Its safe to access */ 2689 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2690 2691 /* Now move the tcb into the endpoint list */ 2692 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2693 /* 2694 * Question, do we even need to worry about the ep-hash since we 2695 * only have one connection? Probably not :> so lets get rid of it 2696 * and not suck up any kernel memory in that. 2697 */ 2698 if (stcb->asoc.in_asocid_hash) { 2699 struct sctpasochead *lhd; 2700 2701 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2702 new_inp->hashasocidmark)]; 2703 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2704 } 2705 /* Ok. Let's restart timer. */ 2706 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2707 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2708 stcb, net); 2709 } 2710 2711 SCTP_INP_INFO_WUNLOCK(); 2712 if (new_inp->sctp_tcbhash != NULL) { 2713 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2714 new_inp->sctp_tcbhash = NULL; 2715 } 2716 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2717 /* Subset bound, so copy in the laddr list from the old_inp */ 2718 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2719 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2720 if (laddr == NULL) { 2721 /* 2722 * Gak, what can we do? This assoc is really 2723 * HOSED. We probably should send an abort 2724 * here. 2725 */ 2726 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2727 continue; 2728 } 2729 SCTP_INCR_LADDR_COUNT(); 2730 memset(laddr, 0, sizeof(*laddr)); 2731 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2732 laddr->ifa = oladdr->ifa; 2733 atomic_add_int(&laddr->ifa->refcount, 1); 2734 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2735 sctp_nxt_addr); 2736 new_inp->laddr_count++; 2737 if (oladdr == stcb->asoc.last_used_address) { 2738 stcb->asoc.last_used_address = laddr; 2739 } 2740 } 2741 } 2742 /* Now any running timers need to be adjusted. */ 2743 if (stcb->asoc.dack_timer.ep == old_inp) { 2744 SCTP_INP_DECR_REF(old_inp); 2745 stcb->asoc.dack_timer.ep = new_inp; 2746 SCTP_INP_INCR_REF(new_inp); 2747 } 2748 if (stcb->asoc.asconf_timer.ep == old_inp) { 2749 SCTP_INP_DECR_REF(old_inp); 2750 stcb->asoc.asconf_timer.ep = new_inp; 2751 SCTP_INP_INCR_REF(new_inp); 2752 } 2753 if (stcb->asoc.strreset_timer.ep == old_inp) { 2754 SCTP_INP_DECR_REF(old_inp); 2755 stcb->asoc.strreset_timer.ep = new_inp; 2756 SCTP_INP_INCR_REF(new_inp); 2757 } 2758 if (stcb->asoc.shut_guard_timer.ep == old_inp) { 2759 SCTP_INP_DECR_REF(old_inp); 2760 stcb->asoc.shut_guard_timer.ep = new_inp; 2761 SCTP_INP_INCR_REF(new_inp); 2762 } 2763 if (stcb->asoc.autoclose_timer.ep == old_inp) { 2764 SCTP_INP_DECR_REF(old_inp); 2765 stcb->asoc.autoclose_timer.ep = new_inp; 2766 SCTP_INP_INCR_REF(new_inp); 2767 } 2768 if (stcb->asoc.delete_prim_timer.ep == old_inp) { 2769 SCTP_INP_DECR_REF(old_inp); 2770 stcb->asoc.delete_prim_timer.ep = new_inp; 2771 SCTP_INP_INCR_REF(new_inp); 2772 } 2773 /* now what about the nets? */ 2774 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2775 if (net->pmtu_timer.ep == old_inp) { 2776 SCTP_INP_DECR_REF(old_inp); 2777 net->pmtu_timer.ep = new_inp; 2778 SCTP_INP_INCR_REF(new_inp); 2779 } 2780 if (net->hb_timer.ep == old_inp) { 2781 SCTP_INP_DECR_REF(old_inp); 2782 net->hb_timer.ep = new_inp; 2783 SCTP_INP_INCR_REF(new_inp); 2784 } 2785 if (net->rxt_timer.ep == old_inp) { 2786 SCTP_INP_DECR_REF(old_inp); 2787 net->rxt_timer.ep = new_inp; 2788 SCTP_INP_INCR_REF(new_inp); 2789 } 2790 } 2791 SCTP_INP_WUNLOCK(new_inp); 2792 SCTP_INP_WUNLOCK(old_inp); 2793 } 2794 2795 /* 2796 * insert an laddr entry with the given ifa for the desired list 2797 */ 2798 static int 2799 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2800 { 2801 struct sctp_laddr *laddr; 2802 2803 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2804 if (laddr == NULL) { 2805 /* out of memory? */ 2806 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2807 return (EINVAL); 2808 } 2809 SCTP_INCR_LADDR_COUNT(); 2810 memset(laddr, 0, sizeof(*laddr)); 2811 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2812 laddr->ifa = ifa; 2813 laddr->action = act; 2814 atomic_add_int(&ifa->refcount, 1); 2815 /* insert it */ 2816 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2817 2818 return (0); 2819 } 2820 2821 /* 2822 * Remove an laddr entry from the local address list (on an assoc) 2823 */ 2824 static void 2825 sctp_remove_laddr(struct sctp_laddr *laddr) 2826 { 2827 2828 /* remove from the list */ 2829 LIST_REMOVE(laddr, sctp_nxt_addr); 2830 sctp_free_ifa(laddr->ifa); 2831 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2832 SCTP_DECR_LADDR_COUNT(); 2833 } 2834 2835 2836 2837 /* sctp_ifap is used to bypass normal local address validation checks */ 2838 int 2839 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2840 struct sctp_ifa *sctp_ifap, struct thread *p) 2841 { 2842 /* bind a ep to a socket address */ 2843 struct sctppcbhead *head; 2844 struct sctp_inpcb *inp, *inp_tmp; 2845 struct inpcb *ip_inp; 2846 int port_reuse_active = 0; 2847 int bindall; 2848 uint16_t lport; 2849 int error; 2850 uint32_t vrf_id; 2851 2852 lport = 0; 2853 bindall = 1; 2854 inp = (struct sctp_inpcb *)so->so_pcb; 2855 ip_inp = (struct inpcb *)so->so_pcb; 2856 #ifdef SCTP_DEBUG 2857 if (addr) { 2858 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2859 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2860 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2861 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2862 } 2863 #endif 2864 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2865 /* already did a bind, subsequent binds NOT allowed ! */ 2866 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2867 return (EINVAL); 2868 } 2869 #ifdef INVARIANTS 2870 if (p == NULL) 2871 panic("null proc/thread"); 2872 #endif 2873 if (addr != NULL) { 2874 switch (addr->sa_family) { 2875 #ifdef INET 2876 case AF_INET: 2877 { 2878 struct sockaddr_in *sin; 2879 2880 /* IPV6_V6ONLY socket? */ 2881 if (SCTP_IPV6_V6ONLY(inp)) { 2882 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2883 return (EINVAL); 2884 } 2885 if (addr->sa_len != sizeof(*sin)) { 2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2887 return (EINVAL); 2888 } 2889 2890 sin = (struct sockaddr_in *)addr; 2891 lport = sin->sin_port; 2892 /* 2893 * For LOOPBACK the prison_local_ip4() call 2894 * will transmute the ip address to the 2895 * proper value. 2896 */ 2897 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2898 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2899 return (error); 2900 } 2901 if (sin->sin_addr.s_addr != INADDR_ANY) { 2902 bindall = 0; 2903 } 2904 break; 2905 } 2906 #endif 2907 #ifdef INET6 2908 case AF_INET6: 2909 { 2910 /* 2911 * Only for pure IPv6 Address. (No IPv4 2912 * Mapped!) 2913 */ 2914 struct sockaddr_in6 *sin6; 2915 2916 sin6 = (struct sockaddr_in6 *)addr; 2917 2918 if (addr->sa_len != sizeof(*sin6)) { 2919 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2920 return (EINVAL); 2921 } 2922 lport = sin6->sin6_port; 2923 /* 2924 * For LOOPBACK the prison_local_ip6() call 2925 * will transmute the ipv6 address to the 2926 * proper value. 2927 */ 2928 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2929 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2930 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2931 return (error); 2932 } 2933 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2934 bindall = 0; 2935 /* KAME hack: embed scopeid */ 2936 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2937 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2938 return (EINVAL); 2939 } 2940 } 2941 /* this must be cleared for ifa_ifwithaddr() */ 2942 sin6->sin6_scope_id = 0; 2943 break; 2944 } 2945 #endif 2946 default: 2947 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2948 return (EAFNOSUPPORT); 2949 } 2950 } 2951 SCTP_INP_INFO_WLOCK(); 2952 SCTP_INP_WLOCK(inp); 2953 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2954 vrf_id = inp->def_vrf_id; 2955 2956 /* increase our count due to the unlock we do */ 2957 SCTP_INP_INCR_REF(inp); 2958 if (lport) { 2959 /* 2960 * Did the caller specify a port? if so we must see if an ep 2961 * already has this one bound. 2962 */ 2963 /* got to be root to get at low ports */ 2964 if (ntohs(lport) < IPPORT_RESERVED) { 2965 if ((p != NULL) && ((error = 2966 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2967 ) != 0)) { 2968 SCTP_INP_DECR_REF(inp); 2969 SCTP_INP_WUNLOCK(inp); 2970 SCTP_INP_INFO_WUNLOCK(); 2971 return (error); 2972 } 2973 } 2974 SCTP_INP_WUNLOCK(inp); 2975 if (bindall) { 2976 vrf_id = inp->def_vrf_id; 2977 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2978 if (inp_tmp != NULL) { 2979 /* 2980 * lock guy returned and lower count note 2981 * that we are not bound so inp_tmp should 2982 * NEVER be inp. And it is this inp 2983 * (inp_tmp) that gets the reference bump, 2984 * so we must lower it. 2985 */ 2986 SCTP_INP_DECR_REF(inp_tmp); 2987 /* unlock info */ 2988 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2989 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2990 /* 2991 * Ok, must be one-2-one and 2992 * allowing port re-use 2993 */ 2994 port_reuse_active = 1; 2995 goto continue_anyway; 2996 } 2997 SCTP_INP_DECR_REF(inp); 2998 SCTP_INP_INFO_WUNLOCK(); 2999 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3000 return (EADDRINUSE); 3001 } 3002 } else { 3003 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 3004 if (inp_tmp != NULL) { 3005 /* 3006 * lock guy returned and lower count note 3007 * that we are not bound so inp_tmp should 3008 * NEVER be inp. And it is this inp 3009 * (inp_tmp) that gets the reference bump, 3010 * so we must lower it. 3011 */ 3012 SCTP_INP_DECR_REF(inp_tmp); 3013 /* unlock info */ 3014 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3015 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3016 /* 3017 * Ok, must be one-2-one and 3018 * allowing port re-use 3019 */ 3020 port_reuse_active = 1; 3021 goto continue_anyway; 3022 } 3023 SCTP_INP_DECR_REF(inp); 3024 SCTP_INP_INFO_WUNLOCK(); 3025 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3026 return (EADDRINUSE); 3027 } 3028 } 3029 continue_anyway: 3030 SCTP_INP_WLOCK(inp); 3031 if (bindall) { 3032 /* verify that no lport is not used by a singleton */ 3033 if ((port_reuse_active == 0) && 3034 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3035 /* Sorry someone already has this one bound */ 3036 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3037 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3038 port_reuse_active = 1; 3039 } else { 3040 SCTP_INP_DECR_REF(inp); 3041 SCTP_INP_WUNLOCK(inp); 3042 SCTP_INP_INFO_WUNLOCK(); 3043 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3044 return (EADDRINUSE); 3045 } 3046 } 3047 } 3048 } else { 3049 uint16_t first, last, candidate; 3050 uint16_t count; 3051 int done; 3052 3053 if (ip_inp->inp_flags & INP_HIGHPORT) { 3054 first = MODULE_GLOBAL(ipport_hifirstauto); 3055 last = MODULE_GLOBAL(ipport_hilastauto); 3056 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3057 if (p && (error = 3058 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3059 )) { 3060 SCTP_INP_DECR_REF(inp); 3061 SCTP_INP_WUNLOCK(inp); 3062 SCTP_INP_INFO_WUNLOCK(); 3063 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3064 return (error); 3065 } 3066 first = MODULE_GLOBAL(ipport_lowfirstauto); 3067 last = MODULE_GLOBAL(ipport_lowlastauto); 3068 } else { 3069 first = MODULE_GLOBAL(ipport_firstauto); 3070 last = MODULE_GLOBAL(ipport_lastauto); 3071 } 3072 if (first > last) { 3073 uint16_t temp; 3074 3075 temp = first; 3076 first = last; 3077 last = temp; 3078 } 3079 count = last - first + 1; /* number of candidates */ 3080 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3081 3082 done = 0; 3083 while (!done) { 3084 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3085 done = 1; 3086 } 3087 if (!done) { 3088 if (--count == 0) { 3089 SCTP_INP_DECR_REF(inp); 3090 SCTP_INP_WUNLOCK(inp); 3091 SCTP_INP_INFO_WUNLOCK(); 3092 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3093 return (EADDRINUSE); 3094 } 3095 if (candidate == last) 3096 candidate = first; 3097 else 3098 candidate = candidate + 1; 3099 } 3100 } 3101 lport = htons(candidate); 3102 } 3103 SCTP_INP_DECR_REF(inp); 3104 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3105 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3106 /* 3107 * this really should not happen. The guy did a non-blocking 3108 * bind and then did a close at the same time. 3109 */ 3110 SCTP_INP_WUNLOCK(inp); 3111 SCTP_INP_INFO_WUNLOCK(); 3112 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3113 return (EINVAL); 3114 } 3115 /* ok we look clear to give out this port, so lets setup the binding */ 3116 if (bindall) { 3117 /* binding to all addresses, so just set in the proper flags */ 3118 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3119 /* set the automatic addr changes from kernel flag */ 3120 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3121 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3122 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3123 } else { 3124 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3125 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3126 } 3127 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3128 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3129 } else { 3130 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3131 } 3132 /* 3133 * set the automatic mobility_base from kernel flag (by 3134 * micchie) 3135 */ 3136 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3137 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3138 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3139 } else { 3140 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3141 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3142 } 3143 /* 3144 * set the automatic mobility_fasthandoff from kernel flag 3145 * (by micchie) 3146 */ 3147 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3148 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3149 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3150 } else { 3151 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3152 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3153 } 3154 } else { 3155 /* 3156 * bind specific, make sure flags is off and add a new 3157 * address structure to the sctp_addr_list inside the ep 3158 * structure. 3159 * 3160 * We will need to allocate one and insert it at the head. 3161 * The socketopt call can just insert new addresses in there 3162 * as well. It will also have to do the embed scope kame 3163 * hack too (before adding). 3164 */ 3165 struct sctp_ifa *ifa; 3166 union sctp_sockstore store; 3167 3168 memset(&store, 0, sizeof(store)); 3169 switch (addr->sa_family) { 3170 #ifdef INET 3171 case AF_INET: 3172 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3173 store.sin.sin_port = 0; 3174 break; 3175 #endif 3176 #ifdef INET6 3177 case AF_INET6: 3178 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3179 store.sin6.sin6_port = 0; 3180 break; 3181 #endif 3182 default: 3183 break; 3184 } 3185 /* 3186 * first find the interface with the bound address need to 3187 * zero out the port to find the address! yuck! can't do 3188 * this earlier since need port for sctp_pcb_findep() 3189 */ 3190 if (sctp_ifap != NULL) { 3191 ifa = sctp_ifap; 3192 } else { 3193 /* 3194 * Note for BSD we hit here always other O/S's will 3195 * pass things in via the sctp_ifap argument. 3196 */ 3197 ifa = sctp_find_ifa_by_addr(&store.sa, 3198 vrf_id, SCTP_ADDR_NOT_LOCKED); 3199 } 3200 if (ifa == NULL) { 3201 /* Can't find an interface with that address */ 3202 SCTP_INP_WUNLOCK(inp); 3203 SCTP_INP_INFO_WUNLOCK(); 3204 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3205 return (EADDRNOTAVAIL); 3206 } 3207 #ifdef INET6 3208 if (addr->sa_family == AF_INET6) { 3209 /* GAK, more FIXME IFA lock? */ 3210 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3211 /* Can't bind a non-existent addr. */ 3212 SCTP_INP_WUNLOCK(inp); 3213 SCTP_INP_INFO_WUNLOCK(); 3214 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3215 return (EINVAL); 3216 } 3217 } 3218 #endif 3219 /* we're not bound all */ 3220 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3221 /* allow bindx() to send ASCONF's for binding changes */ 3222 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3223 /* clear automatic addr changes from kernel flag */ 3224 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3225 3226 /* add this address to the endpoint list */ 3227 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3228 if (error != 0) { 3229 SCTP_INP_WUNLOCK(inp); 3230 SCTP_INP_INFO_WUNLOCK(); 3231 return (error); 3232 } 3233 inp->laddr_count++; 3234 } 3235 /* find the bucket */ 3236 if (port_reuse_active) { 3237 /* Put it into tcp 1-2-1 hash */ 3238 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3239 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3240 } else { 3241 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3242 } 3243 /* put it in the bucket */ 3244 LIST_INSERT_HEAD(head, inp, sctp_hash); 3245 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3246 (void *)head, ntohs(lport), port_reuse_active); 3247 /* set in the port */ 3248 inp->sctp_lport = lport; 3249 3250 /* turn off just the unbound flag */ 3251 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3252 SCTP_INP_WUNLOCK(inp); 3253 SCTP_INP_INFO_WUNLOCK(); 3254 return (0); 3255 } 3256 3257 3258 static void 3259 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3260 { 3261 struct sctp_iterator *it, *nit; 3262 3263 /* 3264 * We enter with the only the ITERATOR_LOCK in place and a write 3265 * lock on the inp_info stuff. 3266 */ 3267 it = sctp_it_ctl.cur_it; 3268 if (it && (it->vn != curvnet)) { 3269 /* Its not looking at our VNET */ 3270 return; 3271 } 3272 if (it && (it->inp == inp)) { 3273 /* 3274 * This is tricky and we hold the iterator lock, but when it 3275 * returns and gets the lock (when we release it) the 3276 * iterator will try to operate on inp. We need to stop that 3277 * from happening. But of course the iterator has a 3278 * reference on the stcb and inp. We can mark it and it will 3279 * stop. 3280 * 3281 * If its a single iterator situation, we set the end 3282 * iterator flag. Otherwise we set the iterator to go to the 3283 * next inp. 3284 * 3285 */ 3286 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3287 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3288 } else { 3289 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3290 } 3291 } 3292 /* 3293 * Now go through and remove any single reference to our inp that 3294 * may be still pending on the list 3295 */ 3296 SCTP_IPI_ITERATOR_WQ_LOCK(); 3297 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3298 if (it->vn != curvnet) { 3299 continue; 3300 } 3301 if (it->inp == inp) { 3302 /* This one points to me is it inp specific? */ 3303 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3304 /* Remove and free this one */ 3305 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3306 it, sctp_nxt_itr); 3307 if (it->function_atend != NULL) { 3308 (*it->function_atend) (it->pointer, it->val); 3309 } 3310 SCTP_FREE(it, SCTP_M_ITER); 3311 } else { 3312 it->inp = LIST_NEXT(it->inp, sctp_list); 3313 if (it->inp) { 3314 SCTP_INP_INCR_REF(it->inp); 3315 } 3316 } 3317 /* 3318 * When its put in the refcnt is incremented so decr 3319 * it 3320 */ 3321 SCTP_INP_DECR_REF(inp); 3322 } 3323 } 3324 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3325 } 3326 3327 /* release sctp_inpcb unbind the port */ 3328 void 3329 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3330 { 3331 /* 3332 * Here we free a endpoint. We must find it (if it is in the Hash 3333 * table) and remove it from there. Then we must also find it in the 3334 * overall list and remove it from there. After all removals are 3335 * complete then any timer has to be stopped. Then start the actual 3336 * freeing. a) Any local lists. b) Any associations. c) The hash of 3337 * all associations. d) finally the ep itself. 3338 */ 3339 struct sctp_tcb *asoc, *nasoc; 3340 struct sctp_laddr *laddr, *nladdr; 3341 struct inpcb *ip_pcb; 3342 struct socket *so; 3343 int being_refed = 0; 3344 struct sctp_queued_to_read *sq, *nsq; 3345 int cnt; 3346 sctp_sharedkey_t *shared_key, *nshared_key; 3347 3348 3349 #ifdef SCTP_LOG_CLOSING 3350 sctp_log_closing(inp, NULL, 0); 3351 #endif 3352 SCTP_ITERATOR_LOCK(); 3353 /* mark any iterators on the list or being processed */ 3354 sctp_iterator_inp_being_freed(inp); 3355 SCTP_ITERATOR_UNLOCK(); 3356 so = inp->sctp_socket; 3357 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3358 /* been here before.. eeks.. get out of here */ 3359 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3360 #ifdef SCTP_LOG_CLOSING 3361 sctp_log_closing(inp, NULL, 1); 3362 #endif 3363 return; 3364 } 3365 SCTP_ASOC_CREATE_LOCK(inp); 3366 SCTP_INP_INFO_WLOCK(); 3367 3368 SCTP_INP_WLOCK(inp); 3369 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3370 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3371 /* socket is gone, so no more wakeups allowed */ 3372 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3373 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3374 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3375 3376 } 3377 /* First time through we have the socket lock, after that no more. */ 3378 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3379 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3380 3381 if (inp->control) { 3382 sctp_m_freem(inp->control); 3383 inp->control = NULL; 3384 } 3385 if (inp->pkt) { 3386 sctp_m_freem(inp->pkt); 3387 inp->pkt = NULL; 3388 } 3389 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3390 * here but I will be nice :> (i.e. 3391 * ip_pcb = ep;) */ 3392 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3393 int cnt_in_sd; 3394 3395 cnt_in_sd = 0; 3396 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3397 SCTP_TCB_LOCK(asoc); 3398 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3399 /* Skip guys being freed */ 3400 cnt_in_sd++; 3401 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3402 /* 3403 * Special case - we did not start a 3404 * kill timer on the asoc due to it 3405 * was not closed. So go ahead and 3406 * start it now. 3407 */ 3408 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3409 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3410 } 3411 SCTP_TCB_UNLOCK(asoc); 3412 continue; 3413 } 3414 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3415 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3416 (asoc->asoc.total_output_queue_size == 0)) { 3417 /* 3418 * If we have data in queue, we don't want 3419 * to just free since the app may have done, 3420 * send()/close or connect/send/close. And 3421 * it wants the data to get across first. 3422 */ 3423 /* Just abandon things in the front states */ 3424 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3425 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3426 cnt_in_sd++; 3427 } 3428 continue; 3429 } 3430 /* Disconnect the socket please */ 3431 asoc->sctp_socket = NULL; 3432 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3433 if ((asoc->asoc.size_on_reasm_queue > 0) || 3434 (asoc->asoc.control_pdapi) || 3435 (asoc->asoc.size_on_all_streams > 0) || 3436 (so && (so->so_rcv.sb_cc > 0))) { 3437 /* Left with Data unread */ 3438 struct mbuf *op_err; 3439 3440 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3441 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3442 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3443 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3444 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3445 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3446 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3447 } 3448 if (sctp_free_assoc(inp, asoc, 3449 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3450 cnt_in_sd++; 3451 } 3452 continue; 3453 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3454 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3455 (asoc->asoc.stream_queue_cnt == 0)) { 3456 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3457 goto abort_anyway; 3458 } 3459 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3460 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3461 struct sctp_nets *netp; 3462 3463 /* 3464 * there is nothing queued to send, 3465 * so I send shutdown 3466 */ 3467 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3468 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3469 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3470 } 3471 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3472 sctp_stop_timers_for_shutdown(asoc); 3473 if (asoc->asoc.alternate) { 3474 netp = asoc->asoc.alternate; 3475 } else { 3476 netp = asoc->asoc.primary_destination; 3477 } 3478 sctp_send_shutdown(asoc, netp); 3479 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3480 netp); 3481 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3482 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3483 } 3484 } else { 3485 /* mark into shutdown pending */ 3486 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3487 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3488 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3489 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3490 } 3491 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3492 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3493 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3494 struct mbuf *op_err; 3495 3496 abort_anyway: 3497 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3498 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3499 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3500 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3501 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3502 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3503 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3504 } 3505 if (sctp_free_assoc(inp, asoc, 3506 SCTP_PCBFREE_NOFORCE, 3507 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3508 cnt_in_sd++; 3509 } 3510 continue; 3511 } else { 3512 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3513 } 3514 } 3515 cnt_in_sd++; 3516 SCTP_TCB_UNLOCK(asoc); 3517 } 3518 /* now is there some left in our SHUTDOWN state? */ 3519 if (cnt_in_sd) { 3520 #ifdef SCTP_LOG_CLOSING 3521 sctp_log_closing(inp, NULL, 2); 3522 #endif 3523 inp->sctp_socket = NULL; 3524 SCTP_INP_WUNLOCK(inp); 3525 SCTP_ASOC_CREATE_UNLOCK(inp); 3526 SCTP_INP_INFO_WUNLOCK(); 3527 return; 3528 } 3529 } 3530 inp->sctp_socket = NULL; 3531 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3532 SCTP_PCB_FLAGS_UNBOUND) { 3533 /* 3534 * ok, this guy has been bound. It's port is somewhere in 3535 * the SCTP_BASE_INFO(hash table). Remove it! 3536 */ 3537 LIST_REMOVE(inp, sctp_hash); 3538 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3539 } 3540 3541 /* 3542 * If there is a timer running to kill us, forget it, since it may 3543 * have a contest on the INP lock.. which would cause us to die ... 3544 */ 3545 cnt = 0; 3546 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3547 SCTP_TCB_LOCK(asoc); 3548 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3549 /* Disconnect the socket please */ 3550 asoc->sctp_socket = NULL; 3551 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3552 } 3553 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3554 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3555 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3556 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3557 } 3558 cnt++; 3559 SCTP_TCB_UNLOCK(asoc); 3560 continue; 3561 } 3562 /* Free associations that are NOT killing us */ 3563 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3564 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3565 struct mbuf *op_err; 3566 3567 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3568 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3569 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3570 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3571 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3572 cnt++; 3573 SCTP_TCB_UNLOCK(asoc); 3574 continue; 3575 } 3576 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3577 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3578 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3579 } 3580 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3581 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3582 cnt++; 3583 } 3584 } 3585 if (cnt) { 3586 /* Ok we have someone out there that will kill us */ 3587 #ifdef SCTP_LOG_CLOSING 3588 sctp_log_closing(inp, NULL, 3); 3589 #endif 3590 SCTP_INP_WUNLOCK(inp); 3591 SCTP_ASOC_CREATE_UNLOCK(inp); 3592 SCTP_INP_INFO_WUNLOCK(); 3593 return; 3594 } 3595 if (SCTP_INP_LOCK_CONTENDED(inp)) 3596 being_refed++; 3597 if (SCTP_INP_READ_CONTENDED(inp)) 3598 being_refed++; 3599 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3600 being_refed++; 3601 /* NOTE: 0 refcount also means no timers are referencing us. */ 3602 if ((inp->refcount) || 3603 (being_refed) || 3604 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3605 #ifdef SCTP_LOG_CLOSING 3606 sctp_log_closing(inp, NULL, 4); 3607 #endif 3608 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3609 SCTP_INP_WUNLOCK(inp); 3610 SCTP_ASOC_CREATE_UNLOCK(inp); 3611 SCTP_INP_INFO_WUNLOCK(); 3612 return; 3613 } 3614 inp->sctp_ep.signature_change.type = 0; 3615 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3616 /* 3617 * Remove it from the list .. last thing we need a lock for. 3618 */ 3619 LIST_REMOVE(inp, sctp_list); 3620 SCTP_INP_WUNLOCK(inp); 3621 SCTP_ASOC_CREATE_UNLOCK(inp); 3622 SCTP_INP_INFO_WUNLOCK(); 3623 3624 #ifdef SCTP_LOG_CLOSING 3625 sctp_log_closing(inp, NULL, 5); 3626 #endif 3627 3628 3629 if ((inp->sctp_asocidhash) != NULL) { 3630 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3631 inp->sctp_asocidhash = NULL; 3632 } 3633 /* sa_ignore FREED_MEMORY */ 3634 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3635 /* Its only abandoned if it had data left */ 3636 if (sq->length) 3637 SCTP_STAT_INCR(sctps_left_abandon); 3638 3639 TAILQ_REMOVE(&inp->read_queue, sq, next); 3640 sctp_free_remote_addr(sq->whoFrom); 3641 if (so) 3642 so->so_rcv.sb_cc -= sq->length; 3643 if (sq->data) { 3644 sctp_m_freem(sq->data); 3645 sq->data = NULL; 3646 } 3647 /* 3648 * no need to free the net count, since at this point all 3649 * assoc's are gone. 3650 */ 3651 sctp_free_a_readq(NULL, sq); 3652 } 3653 /* Now the sctp_pcb things */ 3654 /* 3655 * free each asoc if it is not already closed/free. we can't use the 3656 * macro here since le_next will get freed as part of the 3657 * sctp_free_assoc() call. 3658 */ 3659 if (ip_pcb->inp_options) { 3660 (void)sctp_m_free(ip_pcb->inp_options); 3661 ip_pcb->inp_options = 0; 3662 } 3663 3664 3665 #ifdef INET6 3666 if (ip_pcb->inp_vflag & INP_IPV6) { 3667 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3668 } 3669 #endif /* INET6 */ 3670 ip_pcb->inp_vflag = 0; 3671 /* free up authentication fields */ 3672 if (inp->sctp_ep.local_auth_chunks != NULL) 3673 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3674 if (inp->sctp_ep.local_hmacs != NULL) 3675 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3676 3677 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3678 LIST_REMOVE(shared_key, next); 3679 sctp_free_sharedkey(shared_key); 3680 /* sa_ignore FREED_MEMORY */ 3681 } 3682 3683 /* 3684 * if we have an address list the following will free the list of 3685 * ifaddr's that are set into this ep. Again macro limitations here, 3686 * since the LIST_FOREACH could be a bad idea. 3687 */ 3688 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3689 sctp_remove_laddr(laddr); 3690 } 3691 3692 #ifdef SCTP_TRACK_FREED_ASOCS 3693 /* TEMP CODE */ 3694 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3695 LIST_REMOVE(asoc, sctp_tcblist); 3696 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3697 SCTP_DECR_ASOC_COUNT(); 3698 } 3699 /* *** END TEMP CODE *** */ 3700 #endif 3701 /* Now lets see about freeing the EP hash table. */ 3702 if (inp->sctp_tcbhash != NULL) { 3703 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3704 inp->sctp_tcbhash = NULL; 3705 } 3706 /* Now we must put the ep memory back into the zone pool */ 3707 crfree(inp->ip_inp.inp.inp_cred); 3708 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3709 SCTP_INP_LOCK_DESTROY(inp); 3710 SCTP_INP_READ_DESTROY(inp); 3711 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3712 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3713 SCTP_DECR_EP_COUNT(); 3714 } 3715 3716 3717 struct sctp_nets * 3718 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3719 { 3720 struct sctp_nets *net; 3721 3722 /* locate the address */ 3723 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3724 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3725 return (net); 3726 } 3727 return (NULL); 3728 } 3729 3730 3731 int 3732 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3733 { 3734 struct sctp_ifa *sctp_ifa; 3735 3736 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3737 if (sctp_ifa) { 3738 return (1); 3739 } else { 3740 return (0); 3741 } 3742 } 3743 3744 /* 3745 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3746 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3747 * stats of stuff. 3748 */ 3749 int 3750 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3751 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3752 { 3753 /* 3754 * The following is redundant to the same lines in the 3755 * sctp_aloc_assoc() but is needed since others call the add address 3756 * function 3757 */ 3758 struct sctp_nets *net, *netfirst; 3759 int addr_inscope; 3760 3761 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3762 from); 3763 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3764 3765 netfirst = sctp_findnet(stcb, newaddr); 3766 if (netfirst) { 3767 /* 3768 * Lie and return ok, we don't want to make the association 3769 * go away for this behavior. It will happen in the TCP 3770 * model in a connected socket. It does not reach the hash 3771 * table until after the association is built so it can't be 3772 * found. Mark as reachable, since the initial creation will 3773 * have been cleared and the NOT_IN_ASSOC flag will have 3774 * been added... and we don't want to end up removing it 3775 * back out. 3776 */ 3777 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3778 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3779 SCTP_ADDR_UNCONFIRMED); 3780 } else { 3781 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3782 } 3783 3784 return (0); 3785 } 3786 addr_inscope = 1; 3787 switch (newaddr->sa_family) { 3788 #ifdef INET 3789 case AF_INET: 3790 { 3791 struct sockaddr_in *sin; 3792 3793 sin = (struct sockaddr_in *)newaddr; 3794 if (sin->sin_addr.s_addr == 0) { 3795 /* Invalid address */ 3796 return (-1); 3797 } 3798 /* zero out the zero area */ 3799 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3800 3801 /* assure len is set */ 3802 sin->sin_len = sizeof(struct sockaddr_in); 3803 if (set_scope) { 3804 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3805 stcb->asoc.scope.ipv4_local_scope = 1; 3806 } 3807 } else { 3808 /* Validate the address is in scope */ 3809 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3810 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3811 addr_inscope = 0; 3812 } 3813 } 3814 break; 3815 } 3816 #endif 3817 #ifdef INET6 3818 case AF_INET6: 3819 { 3820 struct sockaddr_in6 *sin6; 3821 3822 sin6 = (struct sockaddr_in6 *)newaddr; 3823 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3824 /* Invalid address */ 3825 return (-1); 3826 } 3827 /* assure len is set */ 3828 sin6->sin6_len = sizeof(struct sockaddr_in6); 3829 if (set_scope) { 3830 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3831 stcb->asoc.scope.loopback_scope = 1; 3832 stcb->asoc.scope.local_scope = 0; 3833 stcb->asoc.scope.ipv4_local_scope = 1; 3834 stcb->asoc.scope.site_scope = 1; 3835 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3836 /* 3837 * If the new destination is a 3838 * LINK_LOCAL we must have common 3839 * site scope. Don't set the local 3840 * scope since we may not share all 3841 * links, only loopback can do this. 3842 * Links on the local network would 3843 * also be on our private network 3844 * for v4 too. 3845 */ 3846 stcb->asoc.scope.ipv4_local_scope = 1; 3847 stcb->asoc.scope.site_scope = 1; 3848 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3849 /* 3850 * If the new destination is 3851 * SITE_LOCAL then we must have site 3852 * scope in common. 3853 */ 3854 stcb->asoc.scope.site_scope = 1; 3855 } 3856 } else { 3857 /* Validate the address is in scope */ 3858 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3859 (stcb->asoc.scope.loopback_scope == 0)) { 3860 addr_inscope = 0; 3861 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3862 (stcb->asoc.scope.local_scope == 0)) { 3863 addr_inscope = 0; 3864 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3865 (stcb->asoc.scope.site_scope == 0)) { 3866 addr_inscope = 0; 3867 } 3868 } 3869 break; 3870 } 3871 #endif 3872 default: 3873 /* not supported family type */ 3874 return (-1); 3875 } 3876 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3877 if (net == NULL) { 3878 return (-1); 3879 } 3880 SCTP_INCR_RADDR_COUNT(); 3881 memset(net, 0, sizeof(struct sctp_nets)); 3882 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3883 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3884 switch (newaddr->sa_family) { 3885 #ifdef INET 3886 case AF_INET: 3887 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3888 break; 3889 #endif 3890 #ifdef INET6 3891 case AF_INET6: 3892 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3893 break; 3894 #endif 3895 default: 3896 break; 3897 } 3898 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3899 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3900 stcb->asoc.scope.loopback_scope = 1; 3901 stcb->asoc.scope.ipv4_local_scope = 1; 3902 stcb->asoc.scope.local_scope = 0; 3903 stcb->asoc.scope.site_scope = 1; 3904 addr_inscope = 1; 3905 } 3906 net->failure_threshold = stcb->asoc.def_net_failure; 3907 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3908 if (addr_inscope == 0) { 3909 net->dest_state = (SCTP_ADDR_REACHABLE | 3910 SCTP_ADDR_OUT_OF_SCOPE); 3911 } else { 3912 if (from == SCTP_ADDR_IS_CONFIRMED) 3913 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3914 net->dest_state = SCTP_ADDR_REACHABLE; 3915 else 3916 net->dest_state = SCTP_ADDR_REACHABLE | 3917 SCTP_ADDR_UNCONFIRMED; 3918 } 3919 /* 3920 * We set this to 0, the timer code knows that this means its an 3921 * initial value 3922 */ 3923 net->rto_needed = 1; 3924 net->RTO = 0; 3925 net->RTO_measured = 0; 3926 stcb->asoc.numnets++; 3927 net->ref_count = 1; 3928 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3929 net->port = port; 3930 net->dscp = stcb->asoc.default_dscp; 3931 #ifdef INET6 3932 net->flowlabel = stcb->asoc.default_flowlabel; 3933 #endif 3934 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3935 net->dest_state |= SCTP_ADDR_NOHB; 3936 } else { 3937 net->dest_state &= ~SCTP_ADDR_NOHB; 3938 } 3939 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3940 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3941 } else { 3942 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3943 } 3944 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3945 /* Init the timer structure */ 3946 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3947 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3948 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3949 3950 /* Now generate a route for this guy */ 3951 #ifdef INET6 3952 /* KAME hack: embed scopeid */ 3953 if (newaddr->sa_family == AF_INET6) { 3954 struct sockaddr_in6 *sin6; 3955 3956 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3957 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3958 sin6->sin6_scope_id = 0; 3959 } 3960 #endif 3961 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3962 stcb->asoc.vrf_id, 3963 stcb->sctp_ep->fibnum); 3964 3965 net->src_addr_selected = 0; 3966 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3967 /* Get source address */ 3968 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3969 stcb, 3970 (sctp_route_t *)&net->ro, 3971 net, 3972 0, 3973 stcb->asoc.vrf_id); 3974 if (stcb->asoc.default_mtu > 0) { 3975 net->mtu = stcb->asoc.default_mtu; 3976 switch (net->ro._l_addr.sa.sa_family) { 3977 #ifdef INET 3978 case AF_INET: 3979 net->mtu += SCTP_MIN_V4_OVERHEAD; 3980 break; 3981 #endif 3982 #ifdef INET6 3983 case AF_INET6: 3984 net->mtu += SCTP_MIN_OVERHEAD; 3985 break; 3986 #endif 3987 default: 3988 break; 3989 } 3990 #if defined(INET) || defined(INET6) 3991 if (net->port) { 3992 net->mtu += (uint32_t)sizeof(struct udphdr); 3993 } 3994 #endif 3995 } else if (net->ro._s_addr != NULL) { 3996 uint32_t imtu, rmtu, hcmtu; 3997 3998 net->src_addr_selected = 1; 3999 /* Now get the interface MTU */ 4000 if (net->ro._s_addr->ifn_p != NULL) { 4001 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 4002 } else { 4003 imtu = 0; 4004 } 4005 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 4006 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 4007 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 4008 } 4009 } 4010 if (net->mtu == 0) { 4011 if (stcb->asoc.default_mtu > 0) { 4012 net->mtu = stcb->asoc.default_mtu; 4013 switch (net->ro._l_addr.sa.sa_family) { 4014 #ifdef INET 4015 case AF_INET: 4016 net->mtu += SCTP_MIN_V4_OVERHEAD; 4017 break; 4018 #endif 4019 #ifdef INET6 4020 case AF_INET6: 4021 net->mtu += SCTP_MIN_OVERHEAD; 4022 break; 4023 #endif 4024 default: 4025 break; 4026 } 4027 #if defined(INET) || defined(INET6) 4028 if (net->port) { 4029 net->mtu += (uint32_t)sizeof(struct udphdr); 4030 } 4031 #endif 4032 } else { 4033 switch (newaddr->sa_family) { 4034 #ifdef INET 4035 case AF_INET: 4036 net->mtu = SCTP_DEFAULT_MTU; 4037 break; 4038 #endif 4039 #ifdef INET6 4040 case AF_INET6: 4041 net->mtu = 1280; 4042 break; 4043 #endif 4044 default: 4045 break; 4046 } 4047 } 4048 } 4049 #if defined(INET) || defined(INET6) 4050 if (net->port) { 4051 net->mtu -= (uint32_t)sizeof(struct udphdr); 4052 } 4053 #endif 4054 if (from == SCTP_ALLOC_ASOC) { 4055 stcb->asoc.smallest_mtu = net->mtu; 4056 } 4057 if (stcb->asoc.smallest_mtu > net->mtu) { 4058 sctp_pathmtu_adjustment(stcb, net->mtu); 4059 } 4060 #ifdef INET6 4061 if (newaddr->sa_family == AF_INET6) { 4062 struct sockaddr_in6 *sin6; 4063 4064 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4065 (void)sa6_recoverscope(sin6); 4066 } 4067 #endif 4068 4069 /* JRS - Use the congestion control given in the CC module */ 4070 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4071 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4072 4073 /* 4074 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4075 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4076 */ 4077 net->find_pseudo_cumack = 1; 4078 net->find_rtx_pseudo_cumack = 1; 4079 /* Choose an initial flowid. */ 4080 net->flowid = stcb->asoc.my_vtag ^ 4081 ntohs(stcb->rport) ^ 4082 ntohs(stcb->sctp_ep->sctp_lport); 4083 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4084 if (netp) { 4085 *netp = net; 4086 } 4087 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4088 if (net->ro.ro_nh == NULL) { 4089 /* Since we have no route put it at the back */ 4090 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4091 } else if (netfirst == NULL) { 4092 /* We are the first one in the pool. */ 4093 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4094 } else if (netfirst->ro.ro_nh == NULL) { 4095 /* 4096 * First one has NO route. Place this one ahead of the first 4097 * one. 4098 */ 4099 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4100 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4101 /* 4102 * This one has a different interface than the one at the 4103 * top of the list. Place it ahead. 4104 */ 4105 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4106 } else { 4107 /* 4108 * Ok we have the same interface as the first one. Move 4109 * forward until we find either a) one with a NULL route... 4110 * insert ahead of that b) one with a different ifp.. insert 4111 * after that. c) end of the list.. insert at the tail. 4112 */ 4113 struct sctp_nets *netlook; 4114 4115 do { 4116 netlook = TAILQ_NEXT(netfirst, sctp_next); 4117 if (netlook == NULL) { 4118 /* End of the list */ 4119 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4120 break; 4121 } else if (netlook->ro.ro_nh == NULL) { 4122 /* next one has NO route */ 4123 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4124 break; 4125 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4126 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4127 net, sctp_next); 4128 break; 4129 } 4130 /* Shift forward */ 4131 netfirst = netlook; 4132 } while (netlook != NULL); 4133 } 4134 4135 /* got to have a primary set */ 4136 if (stcb->asoc.primary_destination == 0) { 4137 stcb->asoc.primary_destination = net; 4138 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4139 (net->ro.ro_nh) && 4140 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4141 /* No route to current primary adopt new primary */ 4142 stcb->asoc.primary_destination = net; 4143 } 4144 /* Validate primary is first */ 4145 net = TAILQ_FIRST(&stcb->asoc.nets); 4146 if ((net != stcb->asoc.primary_destination) && 4147 (stcb->asoc.primary_destination)) { 4148 /* 4149 * first one on the list is NOT the primary sctp_cmpaddr() 4150 * is much more efficient if the primary is the first on the 4151 * list, make it so. 4152 */ 4153 TAILQ_REMOVE(&stcb->asoc.nets, 4154 stcb->asoc.primary_destination, sctp_next); 4155 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4156 stcb->asoc.primary_destination, sctp_next); 4157 } 4158 return (0); 4159 } 4160 4161 4162 static uint32_t 4163 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4164 { 4165 uint32_t id; 4166 struct sctpasochead *head; 4167 struct sctp_tcb *lstcb; 4168 4169 try_again: 4170 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4171 /* TSNH */ 4172 return (0); 4173 } 4174 /* 4175 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4176 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4177 */ 4178 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4179 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4180 } 4181 id = inp->sctp_associd_counter; 4182 inp->sctp_associd_counter++; 4183 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4184 if (lstcb) { 4185 goto try_again; 4186 } 4187 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4188 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4189 stcb->asoc.in_asocid_hash = 1; 4190 return (id); 4191 } 4192 4193 /* 4194 * allocate an association and add it to the endpoint. The caller must be 4195 * careful to add all additional addresses once they are know right away or 4196 * else the assoc will be may experience a blackout scenario. 4197 */ 4198 struct sctp_tcb * 4199 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4200 int *error, uint32_t override_tag, uint32_t vrf_id, 4201 uint16_t o_streams, uint16_t port, 4202 struct thread *p, 4203 int initialize_auth_params) 4204 { 4205 /* note the p argument is only valid in unbound sockets */ 4206 4207 struct sctp_tcb *stcb; 4208 struct sctp_association *asoc; 4209 struct sctpasochead *head; 4210 uint16_t rport; 4211 int err; 4212 4213 /* 4214 * Assumption made here: Caller has done a 4215 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4216 * address does not exist already. 4217 */ 4218 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4219 /* Hit max assoc, sorry no more */ 4220 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4221 *error = ENOBUFS; 4222 return (NULL); 4223 } 4224 if (firstaddr == NULL) { 4225 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4226 *error = EINVAL; 4227 return (NULL); 4228 } 4229 SCTP_INP_RLOCK(inp); 4230 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4231 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4232 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4233 /* 4234 * If its in the TCP pool, its NOT allowed to create an 4235 * association. The parent listener needs to call 4236 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4237 * off, or connected one does this.. its an error. 4238 */ 4239 SCTP_INP_RUNLOCK(inp); 4240 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4241 *error = EINVAL; 4242 return (NULL); 4243 } 4244 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4245 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4246 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4247 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 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 } 4254 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4255 #ifdef SCTP_DEBUG 4256 if (firstaddr) { 4257 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4258 switch (firstaddr->sa_family) { 4259 #ifdef INET 4260 case AF_INET: 4261 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4262 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4263 break; 4264 #endif 4265 #ifdef INET6 4266 case AF_INET6: 4267 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4268 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4269 break; 4270 #endif 4271 default: 4272 break; 4273 } 4274 } else { 4275 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4276 } 4277 #endif /* SCTP_DEBUG */ 4278 switch (firstaddr->sa_family) { 4279 #ifdef INET 4280 case AF_INET: 4281 { 4282 struct sockaddr_in *sin; 4283 4284 sin = (struct sockaddr_in *)firstaddr; 4285 if ((ntohs(sin->sin_port) == 0) || 4286 (sin->sin_addr.s_addr == INADDR_ANY) || 4287 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4288 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4289 /* Invalid address */ 4290 SCTP_INP_RUNLOCK(inp); 4291 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4292 *error = EINVAL; 4293 return (NULL); 4294 } 4295 rport = sin->sin_port; 4296 break; 4297 } 4298 #endif 4299 #ifdef INET6 4300 case AF_INET6: 4301 { 4302 struct sockaddr_in6 *sin6; 4303 4304 sin6 = (struct sockaddr_in6 *)firstaddr; 4305 if ((ntohs(sin6->sin6_port) == 0) || 4306 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4307 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4308 /* Invalid address */ 4309 SCTP_INP_RUNLOCK(inp); 4310 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4311 *error = EINVAL; 4312 return (NULL); 4313 } 4314 rport = sin6->sin6_port; 4315 break; 4316 } 4317 #endif 4318 default: 4319 /* not supported family type */ 4320 SCTP_INP_RUNLOCK(inp); 4321 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4322 *error = EINVAL; 4323 return (NULL); 4324 } 4325 SCTP_INP_RUNLOCK(inp); 4326 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4327 /* 4328 * If you have not performed a bind, then we need to do the 4329 * ephemeral bind for you. 4330 */ 4331 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) { 4332 /* bind error, probably perm */ 4333 *error = err; 4334 return (NULL); 4335 } 4336 } 4337 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4338 if (stcb == NULL) { 4339 /* out of memory? */ 4340 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4341 *error = ENOMEM; 4342 return (NULL); 4343 } 4344 SCTP_INCR_ASOC_COUNT(); 4345 4346 memset(stcb, 0, sizeof(*stcb)); 4347 asoc = &stcb->asoc; 4348 4349 SCTP_TCB_LOCK_INIT(stcb); 4350 SCTP_TCB_SEND_LOCK_INIT(stcb); 4351 stcb->rport = rport; 4352 /* setup back pointer's */ 4353 stcb->sctp_ep = inp; 4354 stcb->sctp_socket = inp->sctp_socket; 4355 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4356 /* failed */ 4357 SCTP_TCB_LOCK_DESTROY(stcb); 4358 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4359 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4360 SCTP_DECR_ASOC_COUNT(); 4361 *error = err; 4362 return (NULL); 4363 } 4364 /* and the port */ 4365 SCTP_INP_INFO_WLOCK(); 4366 SCTP_INP_WLOCK(inp); 4367 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4368 /* inpcb freed while alloc going on */ 4369 SCTP_TCB_LOCK_DESTROY(stcb); 4370 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4371 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4372 SCTP_INP_WUNLOCK(inp); 4373 SCTP_INP_INFO_WUNLOCK(); 4374 SCTP_DECR_ASOC_COUNT(); 4375 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4376 *error = EINVAL; 4377 return (NULL); 4378 } 4379 SCTP_TCB_LOCK(stcb); 4380 4381 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4382 /* now that my_vtag is set, add it to the hash */ 4383 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4384 /* put it in the bucket in the vtag hash of assoc's for the system */ 4385 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4386 SCTP_INP_INFO_WUNLOCK(); 4387 4388 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4389 /* failure.. memory error? */ 4390 if (asoc->strmout) { 4391 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4392 asoc->strmout = NULL; 4393 } 4394 if (asoc->mapping_array) { 4395 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4396 asoc->mapping_array = NULL; 4397 } 4398 if (asoc->nr_mapping_array) { 4399 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4400 asoc->nr_mapping_array = NULL; 4401 } 4402 SCTP_DECR_ASOC_COUNT(); 4403 SCTP_TCB_UNLOCK(stcb); 4404 SCTP_TCB_LOCK_DESTROY(stcb); 4405 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4406 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4407 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4408 SCTP_INP_WUNLOCK(inp); 4409 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4410 *error = ENOBUFS; 4411 return (NULL); 4412 } 4413 /* Init all the timers */ 4414 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4415 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4416 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4417 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4418 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4419 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4420 4421 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4422 /* now file the port under the hash as well */ 4423 if (inp->sctp_tcbhash != NULL) { 4424 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4425 inp->sctp_hashmark)]; 4426 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4427 } 4428 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4429 sctp_initialize_auth_params(inp, stcb); 4430 } 4431 SCTP_INP_WUNLOCK(inp); 4432 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4433 return (stcb); 4434 } 4435 4436 4437 void 4438 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4439 { 4440 struct sctp_inpcb *inp; 4441 struct sctp_association *asoc; 4442 4443 inp = stcb->sctp_ep; 4444 asoc = &stcb->asoc; 4445 asoc->numnets--; 4446 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4447 if (net == asoc->primary_destination) { 4448 /* Reset primary */ 4449 struct sctp_nets *lnet; 4450 4451 lnet = TAILQ_FIRST(&asoc->nets); 4452 /* 4453 * Mobility adaptation Ideally, if deleted destination is 4454 * the primary, it becomes a fast retransmission trigger by 4455 * the subsequent SET PRIMARY. (by micchie) 4456 */ 4457 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4458 SCTP_MOBILITY_BASE) || 4459 sctp_is_mobility_feature_on(stcb->sctp_ep, 4460 SCTP_MOBILITY_FASTHANDOFF)) { 4461 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4462 if (asoc->deleted_primary != NULL) { 4463 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4464 goto out; 4465 } 4466 asoc->deleted_primary = net; 4467 atomic_add_int(&net->ref_count, 1); 4468 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4469 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4470 sctp_mobility_feature_on(stcb->sctp_ep, 4471 SCTP_MOBILITY_PRIM_DELETED); 4472 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4473 stcb->sctp_ep, stcb, NULL); 4474 } 4475 out: 4476 /* Try to find a confirmed primary */ 4477 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4478 } 4479 if (net == asoc->last_data_chunk_from) { 4480 /* Reset primary */ 4481 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4482 } 4483 if (net == asoc->last_control_chunk_from) { 4484 /* Clear net */ 4485 asoc->last_control_chunk_from = NULL; 4486 } 4487 if (net == stcb->asoc.alternate) { 4488 sctp_free_remote_addr(stcb->asoc.alternate); 4489 stcb->asoc.alternate = NULL; 4490 } 4491 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4492 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4493 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4494 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4495 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4496 sctp_free_remote_addr(net); 4497 } 4498 4499 /* 4500 * remove a remote endpoint address from an association, it will fail if the 4501 * address does not exist. 4502 */ 4503 int 4504 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4505 { 4506 /* 4507 * Here we need to remove a remote address. This is quite simple, we 4508 * first find it in the list of address for the association 4509 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4510 * on that item. Note we do not allow it to be removed if there are 4511 * no other addresses. 4512 */ 4513 struct sctp_association *asoc; 4514 struct sctp_nets *net, *nnet; 4515 4516 asoc = &stcb->asoc; 4517 4518 /* locate the address */ 4519 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4520 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4521 continue; 4522 } 4523 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4524 remaddr)) { 4525 /* we found the guy */ 4526 if (asoc->numnets < 2) { 4527 /* Must have at LEAST two remote addresses */ 4528 return (-1); 4529 } else { 4530 sctp_remove_net(stcb, net); 4531 return (0); 4532 } 4533 } 4534 } 4535 /* not found. */ 4536 return (-2); 4537 } 4538 4539 void 4540 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4541 { 4542 struct sctpvtaghead *chain; 4543 struct sctp_tagblock *twait_block; 4544 int found = 0; 4545 int i; 4546 4547 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4548 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4549 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4550 if ((twait_block->vtag_block[i].v_tag == tag) && 4551 (twait_block->vtag_block[i].lport == lport) && 4552 (twait_block->vtag_block[i].rport == rport)) { 4553 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4554 twait_block->vtag_block[i].v_tag = 0; 4555 twait_block->vtag_block[i].lport = 0; 4556 twait_block->vtag_block[i].rport = 0; 4557 found = 1; 4558 break; 4559 } 4560 } 4561 if (found) 4562 break; 4563 } 4564 } 4565 4566 int 4567 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4568 { 4569 struct sctpvtaghead *chain; 4570 struct sctp_tagblock *twait_block; 4571 int found = 0; 4572 int i; 4573 4574 SCTP_INP_INFO_WLOCK(); 4575 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4576 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4577 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4578 if ((twait_block->vtag_block[i].v_tag == tag) && 4579 (twait_block->vtag_block[i].lport == lport) && 4580 (twait_block->vtag_block[i].rport == rport)) { 4581 found = 1; 4582 break; 4583 } 4584 } 4585 if (found) 4586 break; 4587 } 4588 SCTP_INP_INFO_WUNLOCK(); 4589 return (found); 4590 } 4591 4592 4593 void 4594 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4595 { 4596 struct sctpvtaghead *chain; 4597 struct sctp_tagblock *twait_block; 4598 struct timeval now; 4599 int set, i; 4600 4601 if (time == 0) { 4602 /* Its disabled */ 4603 return; 4604 } 4605 (void)SCTP_GETTIME_TIMEVAL(&now); 4606 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4607 set = 0; 4608 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4609 /* Block(s) present, lets find space, and expire on the fly */ 4610 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4611 if ((twait_block->vtag_block[i].v_tag == 0) && 4612 !set) { 4613 twait_block->vtag_block[i].tv_sec_at_expire = 4614 now.tv_sec + time; 4615 twait_block->vtag_block[i].v_tag = tag; 4616 twait_block->vtag_block[i].lport = lport; 4617 twait_block->vtag_block[i].rport = rport; 4618 set = 1; 4619 } else if ((twait_block->vtag_block[i].v_tag) && 4620 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4621 /* Audit expires this guy */ 4622 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4623 twait_block->vtag_block[i].v_tag = 0; 4624 twait_block->vtag_block[i].lport = 0; 4625 twait_block->vtag_block[i].rport = 0; 4626 if (set == 0) { 4627 /* Reuse it for my new tag */ 4628 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4629 twait_block->vtag_block[i].v_tag = tag; 4630 twait_block->vtag_block[i].lport = lport; 4631 twait_block->vtag_block[i].rport = rport; 4632 set = 1; 4633 } 4634 } 4635 } 4636 if (set) { 4637 /* 4638 * We only do up to the block where we can place our 4639 * tag for audits 4640 */ 4641 break; 4642 } 4643 } 4644 /* Need to add a new block to chain */ 4645 if (!set) { 4646 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4647 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4648 if (twait_block == NULL) { 4649 return; 4650 } 4651 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4652 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4653 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4654 twait_block->vtag_block[0].v_tag = tag; 4655 twait_block->vtag_block[0].lport = lport; 4656 twait_block->vtag_block[0].rport = rport; 4657 } 4658 } 4659 4660 void 4661 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4662 { 4663 struct sctp_tmit_chunk *chk, *nchk; 4664 struct sctp_queued_to_read *control, *ncontrol; 4665 4666 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4667 TAILQ_REMOVE(rh, control, next_instrm); 4668 control->on_strm_q = 0; 4669 if (control->on_read_q == 0) { 4670 sctp_free_remote_addr(control->whoFrom); 4671 if (control->data) { 4672 sctp_m_freem(control->data); 4673 control->data = NULL; 4674 } 4675 } 4676 /* Reassembly free? */ 4677 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4678 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4679 if (chk->data) { 4680 sctp_m_freem(chk->data); 4681 chk->data = NULL; 4682 } 4683 if (chk->holds_key_ref) 4684 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4685 sctp_free_remote_addr(chk->whoTo); 4686 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4687 SCTP_DECR_CHK_COUNT(); 4688 /* sa_ignore FREED_MEMORY */ 4689 } 4690 /* 4691 * We don't free the address here since all the net's were 4692 * freed above. 4693 */ 4694 if (control->on_read_q == 0) { 4695 sctp_free_a_readq(stcb, control); 4696 } 4697 } 4698 } 4699 4700 /*- 4701 * Free the association after un-hashing the remote port. This 4702 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4703 * expect that the input to this function IS a locked TCB. 4704 * It will return 0, if it did NOT destroy the association (instead 4705 * it unlocks it. It will return NON-zero if it either destroyed the 4706 * association OR the association is already destroyed. 4707 */ 4708 int 4709 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4710 { 4711 int i; 4712 struct sctp_association *asoc; 4713 struct sctp_nets *net, *nnet; 4714 struct sctp_laddr *laddr, *naddr; 4715 struct sctp_tmit_chunk *chk, *nchk; 4716 struct sctp_asconf_addr *aparam, *naparam; 4717 struct sctp_asconf_ack *aack, *naack; 4718 struct sctp_stream_reset_list *strrst, *nstrrst; 4719 struct sctp_queued_to_read *sq, *nsq; 4720 struct sctp_stream_queue_pending *sp, *nsp; 4721 sctp_sharedkey_t *shared_key, *nshared_key; 4722 struct socket *so; 4723 4724 /* first, lets purge the entry from the hash table. */ 4725 4726 #ifdef SCTP_LOG_CLOSING 4727 sctp_log_closing(inp, stcb, 6); 4728 #endif 4729 if (stcb->asoc.state == 0) { 4730 #ifdef SCTP_LOG_CLOSING 4731 sctp_log_closing(inp, NULL, 7); 4732 #endif 4733 /* there is no asoc, really TSNH :-0 */ 4734 return (1); 4735 } 4736 if (stcb->asoc.alternate) { 4737 sctp_free_remote_addr(stcb->asoc.alternate); 4738 stcb->asoc.alternate = NULL; 4739 } 4740 /* TEMP CODE */ 4741 if (stcb->freed_from_where == 0) { 4742 /* Only record the first place free happened from */ 4743 stcb->freed_from_where = from_location; 4744 } 4745 /* TEMP CODE */ 4746 4747 asoc = &stcb->asoc; 4748 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4749 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4750 /* nothing around */ 4751 so = NULL; 4752 else 4753 so = inp->sctp_socket; 4754 4755 /* 4756 * We used timer based freeing if a reader or writer is in the way. 4757 * So we first check if we are actually being called from a timer, 4758 * if so we abort early if a reader or writer is still in the way. 4759 */ 4760 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4761 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4762 /* 4763 * is it the timer driving us? if so are the reader/writers 4764 * gone? 4765 */ 4766 if (stcb->asoc.refcnt) { 4767 /* nope, reader or writer in the way */ 4768 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4769 /* no asoc destroyed */ 4770 SCTP_TCB_UNLOCK(stcb); 4771 #ifdef SCTP_LOG_CLOSING 4772 sctp_log_closing(inp, stcb, 8); 4773 #endif 4774 return (0); 4775 } 4776 } 4777 /* Now clean up any other timers */ 4778 sctp_stop_association_timers(stcb, false); 4779 /* Now the read queue needs to be cleaned up (only once) */ 4780 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4781 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4782 SCTP_INP_READ_LOCK(inp); 4783 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4784 if (sq->stcb == stcb) { 4785 sq->do_not_ref_stcb = 1; 4786 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4787 /* 4788 * If there is no end, there never will be 4789 * now. 4790 */ 4791 if (sq->end_added == 0) { 4792 /* Held for PD-API clear that. */ 4793 sq->pdapi_aborted = 1; 4794 sq->held_length = 0; 4795 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4796 /* 4797 * Need to add a PD-API 4798 * aborted indication. 4799 * Setting the control_pdapi 4800 * assures that it will be 4801 * added right after this 4802 * msg. 4803 */ 4804 uint32_t strseq; 4805 4806 stcb->asoc.control_pdapi = sq; 4807 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4808 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4809 stcb, 4810 SCTP_PARTIAL_DELIVERY_ABORTED, 4811 (void *)&strseq, 4812 SCTP_SO_LOCKED); 4813 stcb->asoc.control_pdapi = NULL; 4814 } 4815 } 4816 /* Add an end to wake them */ 4817 sq->end_added = 1; 4818 } 4819 } 4820 SCTP_INP_READ_UNLOCK(inp); 4821 if (stcb->block_entry) { 4822 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4823 stcb->block_entry->error = ECONNRESET; 4824 stcb->block_entry = NULL; 4825 } 4826 } 4827 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4828 /* 4829 * Someone holds a reference OR the socket is unaccepted 4830 * yet. 4831 */ 4832 if ((stcb->asoc.refcnt) || 4833 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4834 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4835 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4836 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4837 } 4838 SCTP_TCB_UNLOCK(stcb); 4839 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4840 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4841 /* nothing around */ 4842 so = NULL; 4843 if (so) { 4844 /* Wake any reader/writers */ 4845 sctp_sorwakeup(inp, so); 4846 sctp_sowwakeup(inp, so); 4847 } 4848 4849 #ifdef SCTP_LOG_CLOSING 4850 sctp_log_closing(inp, stcb, 9); 4851 #endif 4852 /* no asoc destroyed */ 4853 return (0); 4854 } 4855 #ifdef SCTP_LOG_CLOSING 4856 sctp_log_closing(inp, stcb, 10); 4857 #endif 4858 /* 4859 * When I reach here, no others want to kill the assoc yet.. and I 4860 * own the lock. Now its possible an abort comes in when I do the 4861 * lock exchange below to grab all the locks to do the final take 4862 * out. to prevent this we increment the count, which will start a 4863 * timer and blow out above thus assuring us that we hold exclusive 4864 * killing of the asoc. Note that after getting back the TCB lock we 4865 * will go ahead and increment the counter back up and stop any 4866 * timer a passing stranger may have started :-S 4867 */ 4868 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4869 atomic_add_int(&stcb->asoc.refcnt, 1); 4870 4871 SCTP_TCB_UNLOCK(stcb); 4872 SCTP_INP_INFO_WLOCK(); 4873 SCTP_INP_WLOCK(inp); 4874 SCTP_TCB_LOCK(stcb); 4875 } 4876 /* Double check the GONE flag */ 4877 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4878 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4879 /* nothing around */ 4880 so = NULL; 4881 4882 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4883 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4884 /* 4885 * For TCP type we need special handling when we are 4886 * connected. We also include the peel'ed off ones to. 4887 */ 4888 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4889 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4890 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4891 if (so) { 4892 SOCKBUF_LOCK(&so->so_rcv); 4893 so->so_state &= ~(SS_ISCONNECTING | 4894 SS_ISDISCONNECTING | 4895 SS_ISCONFIRMING | 4896 SS_ISCONNECTED); 4897 so->so_state |= SS_ISDISCONNECTED; 4898 socantrcvmore_locked(so); 4899 socantsendmore(so); 4900 sctp_sowwakeup(inp, so); 4901 sctp_sorwakeup(inp, so); 4902 SCTP_SOWAKEUP(so); 4903 } 4904 } 4905 } 4906 4907 /* 4908 * Make it invalid too, that way if its about to run it will abort 4909 * and return. 4910 */ 4911 /* re-increment the lock */ 4912 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4913 atomic_add_int(&stcb->asoc.refcnt, -1); 4914 } 4915 if (stcb->asoc.refcnt) { 4916 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4917 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4918 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4919 SCTP_INP_INFO_WUNLOCK(); 4920 SCTP_INP_WUNLOCK(inp); 4921 } 4922 SCTP_TCB_UNLOCK(stcb); 4923 return (0); 4924 } 4925 asoc->state = 0; 4926 if (inp->sctp_tcbhash) { 4927 LIST_REMOVE(stcb, sctp_tcbhash); 4928 } 4929 if (stcb->asoc.in_asocid_hash) { 4930 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4931 } 4932 /* Now lets remove it from the list of ALL associations in the EP */ 4933 LIST_REMOVE(stcb, sctp_tcblist); 4934 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4935 SCTP_INP_INCR_REF(inp); 4936 SCTP_INP_WUNLOCK(inp); 4937 } 4938 /* pull from vtag hash */ 4939 LIST_REMOVE(stcb, sctp_asocs); 4940 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4941 inp->sctp_lport, stcb->rport); 4942 4943 /* 4944 * Now restop the timers to be sure this is paranoia at is finest! 4945 */ 4946 sctp_stop_association_timers(stcb, true); 4947 4948 /* 4949 * The chunk lists and such SHOULD be empty but we check them just 4950 * in case. 4951 */ 4952 /* anything on the wheel needs to be removed */ 4953 SCTP_TCB_SEND_LOCK(stcb); 4954 for (i = 0; i < asoc->streamoutcnt; i++) { 4955 struct sctp_stream_out *outs; 4956 4957 outs = &asoc->strmout[i]; 4958 /* now clean up any chunks here */ 4959 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4960 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4961 TAILQ_REMOVE(&outs->outqueue, sp, next); 4962 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1); 4963 sctp_free_spbufspace(stcb, asoc, sp); 4964 if (sp->data) { 4965 if (so) { 4966 /* Still an open socket - report */ 4967 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4968 0, (void *)sp, SCTP_SO_LOCKED); 4969 } 4970 if (sp->data) { 4971 sctp_m_freem(sp->data); 4972 sp->data = NULL; 4973 sp->tail_mbuf = NULL; 4974 sp->length = 0; 4975 } 4976 } 4977 if (sp->net) { 4978 sctp_free_remote_addr(sp->net); 4979 sp->net = NULL; 4980 } 4981 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4982 } 4983 } 4984 SCTP_TCB_SEND_UNLOCK(stcb); 4985 /* sa_ignore FREED_MEMORY */ 4986 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4987 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4988 SCTP_FREE(strrst, SCTP_M_STRESET); 4989 } 4990 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4991 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4992 if (sq->data) { 4993 sctp_m_freem(sq->data); 4994 sq->data = NULL; 4995 } 4996 sctp_free_remote_addr(sq->whoFrom); 4997 sq->whoFrom = NULL; 4998 sq->stcb = NULL; 4999 /* Free the ctl entry */ 5000 sctp_free_a_readq(stcb, sq); 5001 /* sa_ignore FREED_MEMORY */ 5002 } 5003 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5004 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5005 if (chk->data) { 5006 sctp_m_freem(chk->data); 5007 chk->data = NULL; 5008 } 5009 if (chk->holds_key_ref) 5010 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5011 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5012 SCTP_DECR_CHK_COUNT(); 5013 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5014 asoc->free_chunk_cnt--; 5015 /* sa_ignore FREED_MEMORY */ 5016 } 5017 /* pending send queue SHOULD be empty */ 5018 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 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 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5027 if (chk->data) { 5028 if (so) { 5029 /* Still a socket? */ 5030 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5031 0, chk, SCTP_SO_LOCKED); 5032 } 5033 if (chk->data) { 5034 sctp_m_freem(chk->data); 5035 chk->data = NULL; 5036 } 5037 } 5038 if (chk->holds_key_ref) 5039 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5040 if (chk->whoTo) { 5041 sctp_free_remote_addr(chk->whoTo); 5042 chk->whoTo = NULL; 5043 } 5044 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5045 SCTP_DECR_CHK_COUNT(); 5046 /* sa_ignore FREED_MEMORY */ 5047 } 5048 /* sent queue SHOULD be empty */ 5049 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5050 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5051 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5052 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5053 #ifdef INVARIANTS 5054 } else { 5055 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5056 #endif 5057 } 5058 } 5059 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5060 if (chk->data) { 5061 if (so) { 5062 /* Still a socket? */ 5063 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5064 0, chk, SCTP_SO_LOCKED); 5065 } 5066 if (chk->data) { 5067 sctp_m_freem(chk->data); 5068 chk->data = NULL; 5069 } 5070 } 5071 if (chk->holds_key_ref) 5072 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5073 sctp_free_remote_addr(chk->whoTo); 5074 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5075 SCTP_DECR_CHK_COUNT(); 5076 /* sa_ignore FREED_MEMORY */ 5077 } 5078 #ifdef INVARIANTS 5079 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5080 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5081 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5082 } 5083 } 5084 #endif 5085 /* control queue MAY not be empty */ 5086 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5087 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5088 if (chk->data) { 5089 sctp_m_freem(chk->data); 5090 chk->data = NULL; 5091 } 5092 if (chk->holds_key_ref) 5093 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5094 sctp_free_remote_addr(chk->whoTo); 5095 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5096 SCTP_DECR_CHK_COUNT(); 5097 /* sa_ignore FREED_MEMORY */ 5098 } 5099 /* ASCONF queue MAY not be empty */ 5100 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5101 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5102 if (chk->data) { 5103 sctp_m_freem(chk->data); 5104 chk->data = NULL; 5105 } 5106 if (chk->holds_key_ref) 5107 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5108 sctp_free_remote_addr(chk->whoTo); 5109 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5110 SCTP_DECR_CHK_COUNT(); 5111 /* sa_ignore FREED_MEMORY */ 5112 } 5113 if (asoc->mapping_array) { 5114 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5115 asoc->mapping_array = NULL; 5116 } 5117 if (asoc->nr_mapping_array) { 5118 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5119 asoc->nr_mapping_array = NULL; 5120 } 5121 /* the stream outs */ 5122 if (asoc->strmout) { 5123 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5124 asoc->strmout = NULL; 5125 } 5126 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5127 if (asoc->strmin) { 5128 for (i = 0; i < asoc->streamincnt; i++) { 5129 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5130 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5131 } 5132 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5133 asoc->strmin = NULL; 5134 } 5135 asoc->streamincnt = 0; 5136 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5137 #ifdef INVARIANTS 5138 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5139 panic("no net's left alloc'ed, or list points to itself"); 5140 } 5141 #endif 5142 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5143 sctp_free_remote_addr(net); 5144 } 5145 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5146 /* sa_ignore FREED_MEMORY */ 5147 sctp_remove_laddr(laddr); 5148 } 5149 5150 /* pending asconf (address) parameters */ 5151 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5152 /* sa_ignore FREED_MEMORY */ 5153 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5154 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5155 } 5156 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5157 /* sa_ignore FREED_MEMORY */ 5158 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5159 if (aack->data != NULL) { 5160 sctp_m_freem(aack->data); 5161 } 5162 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5163 } 5164 /* clean up auth stuff */ 5165 if (asoc->local_hmacs) 5166 sctp_free_hmaclist(asoc->local_hmacs); 5167 if (asoc->peer_hmacs) 5168 sctp_free_hmaclist(asoc->peer_hmacs); 5169 5170 if (asoc->local_auth_chunks) 5171 sctp_free_chunklist(asoc->local_auth_chunks); 5172 if (asoc->peer_auth_chunks) 5173 sctp_free_chunklist(asoc->peer_auth_chunks); 5174 5175 sctp_free_authinfo(&asoc->authinfo); 5176 5177 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5178 LIST_REMOVE(shared_key, next); 5179 sctp_free_sharedkey(shared_key); 5180 /* sa_ignore FREED_MEMORY */ 5181 } 5182 5183 /* Insert new items here :> */ 5184 5185 /* Get rid of LOCK */ 5186 SCTP_TCB_UNLOCK(stcb); 5187 SCTP_TCB_LOCK_DESTROY(stcb); 5188 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5189 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5190 SCTP_INP_INFO_WUNLOCK(); 5191 SCTP_INP_RLOCK(inp); 5192 } 5193 #ifdef SCTP_TRACK_FREED_ASOCS 5194 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5195 /* now clean up the tasoc itself */ 5196 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5197 SCTP_DECR_ASOC_COUNT(); 5198 } else { 5199 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5200 } 5201 #else 5202 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5203 SCTP_DECR_ASOC_COUNT(); 5204 #endif 5205 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5206 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5207 /* 5208 * If its NOT the inp_free calling us AND sctp_close 5209 * as been called, we call back... 5210 */ 5211 SCTP_INP_RUNLOCK(inp); 5212 /* 5213 * This will start the kill timer (if we are the 5214 * last one) since we hold an increment yet. But 5215 * this is the only safe way to do this since 5216 * otherwise if the socket closes at the same time 5217 * we are here we might collide in the cleanup. 5218 */ 5219 sctp_inpcb_free(inp, 5220 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5221 SCTP_CALLED_DIRECTLY_NOCMPSET); 5222 SCTP_INP_DECR_REF(inp); 5223 } else { 5224 /* The socket is still open. */ 5225 SCTP_INP_DECR_REF(inp); 5226 SCTP_INP_RUNLOCK(inp); 5227 } 5228 } 5229 /* destroyed the asoc */ 5230 #ifdef SCTP_LOG_CLOSING 5231 sctp_log_closing(inp, NULL, 11); 5232 #endif 5233 return (1); 5234 } 5235 5236 5237 5238 /* 5239 * determine if a destination is "reachable" based upon the addresses bound 5240 * to the current endpoint (e.g. only v4 or v6 currently bound) 5241 */ 5242 /* 5243 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5244 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5245 * types bound as its endpoint 5246 */ 5247 int 5248 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5249 { 5250 struct sctp_inpcb *inp; 5251 int answer; 5252 5253 /* 5254 * No locks here, the TCB, in all cases is already locked and an 5255 * assoc is up. There is either a INP lock by the caller applied (in 5256 * asconf case when deleting an address) or NOT in the HB case, 5257 * however if HB then the INP increment is up and the INP will not 5258 * be removed (on top of the fact that we have a TCB lock). So we 5259 * only want to read the sctp_flags, which is either bound-all or 5260 * not.. no protection needed since once an assoc is up you can't be 5261 * changing your binding. 5262 */ 5263 inp = stcb->sctp_ep; 5264 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5265 /* if bound all, destination is not restricted */ 5266 /* 5267 * RRS: Question during lock work: Is this correct? If you 5268 * are bound-all you still might need to obey the V4--V6 5269 * flags??? IMO this bound-all stuff needs to be removed! 5270 */ 5271 return (1); 5272 } 5273 /* NOTE: all "scope" checks are done when local addresses are added */ 5274 switch (destaddr->sa_family) { 5275 #ifdef INET6 5276 case AF_INET6: 5277 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5278 break; 5279 #endif 5280 #ifdef INET 5281 case AF_INET: 5282 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5283 break; 5284 #endif 5285 default: 5286 /* invalid family, so it's unreachable */ 5287 answer = 0; 5288 break; 5289 } 5290 return (answer); 5291 } 5292 5293 /* 5294 * update the inp_vflags on an endpoint 5295 */ 5296 static void 5297 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5298 { 5299 struct sctp_laddr *laddr; 5300 5301 /* first clear the flag */ 5302 inp->ip_inp.inp.inp_vflag = 0; 5303 /* set the flag based on addresses on the ep list */ 5304 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5305 if (laddr->ifa == NULL) { 5306 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5307 __func__); 5308 continue; 5309 } 5310 5311 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5312 continue; 5313 } 5314 switch (laddr->ifa->address.sa.sa_family) { 5315 #ifdef INET6 5316 case AF_INET6: 5317 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5318 break; 5319 #endif 5320 #ifdef INET 5321 case AF_INET: 5322 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5323 break; 5324 #endif 5325 default: 5326 break; 5327 } 5328 } 5329 } 5330 5331 /* 5332 * Add the address to the endpoint local address list There is nothing to be 5333 * done if we are bound to all addresses 5334 */ 5335 void 5336 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5337 { 5338 struct sctp_laddr *laddr; 5339 struct sctp_tcb *stcb; 5340 int fnd, error = 0; 5341 5342 fnd = 0; 5343 5344 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5345 /* You are already bound to all. You have it already */ 5346 return; 5347 } 5348 #ifdef INET6 5349 if (ifa->address.sa.sa_family == AF_INET6) { 5350 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5351 /* Can't bind a non-useable addr. */ 5352 return; 5353 } 5354 } 5355 #endif 5356 /* first, is it already present? */ 5357 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5358 if (laddr->ifa == ifa) { 5359 fnd = 1; 5360 break; 5361 } 5362 } 5363 5364 if (fnd == 0) { 5365 /* Not in the ep list */ 5366 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5367 if (error != 0) 5368 return; 5369 inp->laddr_count++; 5370 /* update inp_vflag flags */ 5371 switch (ifa->address.sa.sa_family) { 5372 #ifdef INET6 5373 case AF_INET6: 5374 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5375 break; 5376 #endif 5377 #ifdef INET 5378 case AF_INET: 5379 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5380 break; 5381 #endif 5382 default: 5383 break; 5384 } 5385 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5386 sctp_add_local_addr_restricted(stcb, ifa); 5387 } 5388 } 5389 return; 5390 } 5391 5392 5393 /* 5394 * select a new (hopefully reachable) destination net (should only be used 5395 * when we deleted an ep addr that is the only usable source address to reach 5396 * the destination net) 5397 */ 5398 static void 5399 sctp_select_primary_destination(struct sctp_tcb *stcb) 5400 { 5401 struct sctp_nets *net; 5402 5403 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5404 /* for now, we'll just pick the first reachable one we find */ 5405 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5406 continue; 5407 if (sctp_destination_is_reachable(stcb, 5408 (struct sockaddr *)&net->ro._l_addr)) { 5409 /* found a reachable destination */ 5410 stcb->asoc.primary_destination = net; 5411 } 5412 } 5413 /* I can't there from here! ...we're gonna die shortly... */ 5414 } 5415 5416 5417 /* 5418 * Delete the address from the endpoint local address list. There is nothing 5419 * to be done if we are bound to all addresses 5420 */ 5421 void 5422 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5423 { 5424 struct sctp_laddr *laddr; 5425 int fnd; 5426 5427 fnd = 0; 5428 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5429 /* You are already bound to all. You have it already */ 5430 return; 5431 } 5432 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5433 if (laddr->ifa == ifa) { 5434 fnd = 1; 5435 break; 5436 } 5437 } 5438 if (fnd && (inp->laddr_count < 2)) { 5439 /* can't delete unless there are at LEAST 2 addresses */ 5440 return; 5441 } 5442 if (fnd) { 5443 /* 5444 * clean up any use of this address go through our 5445 * associations and clear any last_used_address that match 5446 * this one for each assoc, see if a new primary_destination 5447 * is needed 5448 */ 5449 struct sctp_tcb *stcb; 5450 5451 /* clean up "next_addr_touse" */ 5452 if (inp->next_addr_touse == laddr) 5453 /* delete this address */ 5454 inp->next_addr_touse = NULL; 5455 5456 /* clean up "last_used_address" */ 5457 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5458 struct sctp_nets *net; 5459 5460 SCTP_TCB_LOCK(stcb); 5461 if (stcb->asoc.last_used_address == laddr) 5462 /* delete this address */ 5463 stcb->asoc.last_used_address = NULL; 5464 /* 5465 * Now spin through all the nets and purge any ref 5466 * to laddr 5467 */ 5468 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5469 if (net->ro._s_addr == laddr->ifa) { 5470 /* Yep, purge src address selected */ 5471 RO_NHFREE(&net->ro); 5472 sctp_free_ifa(net->ro._s_addr); 5473 net->ro._s_addr = NULL; 5474 net->src_addr_selected = 0; 5475 } 5476 } 5477 SCTP_TCB_UNLOCK(stcb); 5478 } /* for each tcb */ 5479 /* remove it from the ep list */ 5480 sctp_remove_laddr(laddr); 5481 inp->laddr_count--; 5482 /* update inp_vflag flags */ 5483 sctp_update_ep_vflag(inp); 5484 } 5485 return; 5486 } 5487 5488 /* 5489 * Add the address to the TCB local address restricted list. 5490 * This is a "pending" address list (eg. addresses waiting for an 5491 * ASCONF-ACK response) and cannot be used as a valid source address. 5492 */ 5493 void 5494 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5495 { 5496 struct sctp_laddr *laddr; 5497 struct sctpladdr *list; 5498 5499 /* 5500 * Assumes TCB is locked.. and possibly the INP. May need to 5501 * confirm/fix that if we need it and is not the case. 5502 */ 5503 list = &stcb->asoc.sctp_restricted_addrs; 5504 5505 #ifdef INET6 5506 if (ifa->address.sa.sa_family == AF_INET6) { 5507 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5508 /* Can't bind a non-existent addr. */ 5509 return; 5510 } 5511 } 5512 #endif 5513 /* does the address already exist? */ 5514 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5515 if (laddr->ifa == ifa) { 5516 return; 5517 } 5518 } 5519 5520 /* add to the list */ 5521 (void)sctp_insert_laddr(list, ifa, 0); 5522 return; 5523 } 5524 5525 /* 5526 * Remove a local address from the TCB local address restricted list 5527 */ 5528 void 5529 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5530 { 5531 struct sctp_inpcb *inp; 5532 struct sctp_laddr *laddr; 5533 5534 /* 5535 * This is called by asconf work. It is assumed that a) The TCB is 5536 * locked and b) The INP is locked. This is true in as much as I can 5537 * trace through the entry asconf code where I did these locks. 5538 * Again, the ASCONF code is a bit different in that it does lock 5539 * the INP during its work often times. This must be since we don't 5540 * want other proc's looking up things while what they are looking 5541 * up is changing :-D 5542 */ 5543 5544 inp = stcb->sctp_ep; 5545 /* if subset bound and don't allow ASCONF's, can't delete last */ 5546 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5547 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5548 if (stcb->sctp_ep->laddr_count < 2) { 5549 /* can't delete last address */ 5550 return; 5551 } 5552 } 5553 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5554 /* remove the address if it exists */ 5555 if (laddr->ifa == NULL) 5556 continue; 5557 if (laddr->ifa == ifa) { 5558 sctp_remove_laddr(laddr); 5559 return; 5560 } 5561 } 5562 5563 /* address not found! */ 5564 return; 5565 } 5566 5567 /* sysctl */ 5568 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5569 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5570 5571 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5572 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5573 int *sctp_cpuarry = NULL; 5574 5575 void 5576 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5577 { 5578 /* Queue a packet to a processor for the specified core */ 5579 struct sctp_mcore_queue *qent; 5580 struct sctp_mcore_ctrl *wkq; 5581 int need_wake = 0; 5582 5583 if (sctp_mcore_workers == NULL) { 5584 /* Something went way bad during setup */ 5585 sctp_input_with_port(m, off, 0); 5586 return; 5587 } 5588 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5589 (sizeof(struct sctp_mcore_queue)), 5590 SCTP_M_MCORE); 5591 if (qent == NULL) { 5592 /* This is trouble */ 5593 sctp_input_with_port(m, off, 0); 5594 return; 5595 } 5596 qent->vn = curvnet; 5597 qent->m = m; 5598 qent->off = off; 5599 qent->v6 = 0; 5600 wkq = &sctp_mcore_workers[cpu_to_use]; 5601 SCTP_MCORE_QLOCK(wkq); 5602 5603 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5604 if (wkq->running == 0) { 5605 need_wake = 1; 5606 } 5607 SCTP_MCORE_QUNLOCK(wkq); 5608 if (need_wake) { 5609 wakeup(&wkq->running); 5610 } 5611 } 5612 5613 static void 5614 sctp_mcore_thread(void *arg) 5615 { 5616 5617 struct sctp_mcore_ctrl *wkq; 5618 struct sctp_mcore_queue *qent; 5619 5620 wkq = (struct sctp_mcore_ctrl *)arg; 5621 struct mbuf *m; 5622 int off, v6; 5623 5624 /* Wait for first tickle */ 5625 SCTP_MCORE_LOCK(wkq); 5626 wkq->running = 0; 5627 msleep(&wkq->running, 5628 &wkq->core_mtx, 5629 0, "wait for pkt", 0); 5630 SCTP_MCORE_UNLOCK(wkq); 5631 5632 /* Bind to our cpu */ 5633 thread_lock(curthread); 5634 sched_bind(curthread, wkq->cpuid); 5635 thread_unlock(curthread); 5636 5637 /* Now lets start working */ 5638 SCTP_MCORE_LOCK(wkq); 5639 /* Now grab lock and go */ 5640 for (;;) { 5641 SCTP_MCORE_QLOCK(wkq); 5642 skip_sleep: 5643 wkq->running = 1; 5644 qent = TAILQ_FIRST(&wkq->que); 5645 if (qent) { 5646 TAILQ_REMOVE(&wkq->que, qent, next); 5647 SCTP_MCORE_QUNLOCK(wkq); 5648 CURVNET_SET(qent->vn); 5649 m = qent->m; 5650 off = qent->off; 5651 v6 = qent->v6; 5652 SCTP_FREE(qent, SCTP_M_MCORE); 5653 if (v6 == 0) { 5654 sctp_input_with_port(m, off, 0); 5655 } else { 5656 SCTP_PRINTF("V6 not yet supported\n"); 5657 sctp_m_freem(m); 5658 } 5659 CURVNET_RESTORE(); 5660 SCTP_MCORE_QLOCK(wkq); 5661 } 5662 wkq->running = 0; 5663 if (!TAILQ_EMPTY(&wkq->que)) { 5664 goto skip_sleep; 5665 } 5666 SCTP_MCORE_QUNLOCK(wkq); 5667 msleep(&wkq->running, 5668 &wkq->core_mtx, 5669 0, "wait for pkt", 0); 5670 } 5671 } 5672 5673 static void 5674 sctp_startup_mcore_threads(void) 5675 { 5676 int i, cpu; 5677 5678 if (mp_ncpus == 1) 5679 return; 5680 5681 if (sctp_mcore_workers != NULL) { 5682 /* 5683 * Already been here in some previous vnet? 5684 */ 5685 return; 5686 } 5687 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5688 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5689 SCTP_M_MCORE); 5690 if (sctp_mcore_workers == NULL) { 5691 /* TSNH I hope */ 5692 return; 5693 } 5694 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5695 sizeof(struct sctp_mcore_ctrl))); 5696 /* Init the structures */ 5697 for (i = 0; i <= mp_maxid; i++) { 5698 TAILQ_INIT(&sctp_mcore_workers[i].que); 5699 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5700 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5701 sctp_mcore_workers[i].cpuid = i; 5702 } 5703 if (sctp_cpuarry == NULL) { 5704 SCTP_MALLOC(sctp_cpuarry, int *, 5705 (mp_ncpus * sizeof(int)), 5706 SCTP_M_MCORE); 5707 i = 0; 5708 CPU_FOREACH(cpu) { 5709 sctp_cpuarry[i] = cpu; 5710 i++; 5711 } 5712 } 5713 /* Now start them all */ 5714 CPU_FOREACH(cpu) { 5715 (void)kproc_create(sctp_mcore_thread, 5716 (void *)&sctp_mcore_workers[cpu], 5717 &sctp_mcore_workers[cpu].thread_proc, 5718 RFPROC, 5719 SCTP_KTHREAD_PAGES, 5720 SCTP_MCORE_NAME); 5721 } 5722 } 5723 #endif 5724 5725 void 5726 sctp_pcb_init(void) 5727 { 5728 /* 5729 * SCTP initialization for the PCB structures should be called by 5730 * the sctp_init() function. 5731 */ 5732 int i; 5733 struct timeval tv; 5734 5735 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5736 /* error I was called twice */ 5737 return; 5738 } 5739 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5740 5741 #if defined(SCTP_LOCAL_TRACE_BUF) 5742 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5743 #endif 5744 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5745 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5746 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5747 SCTP_M_MCORE); 5748 #endif 5749 (void)SCTP_GETTIME_TIMEVAL(&tv); 5750 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5751 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5752 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5753 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5754 #else 5755 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5756 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5757 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5758 #endif 5759 /* init the empty list of (All) Endpoints */ 5760 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5761 5762 5763 /* init the hash table of endpoints */ 5764 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5765 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5766 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5767 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5768 &SCTP_BASE_INFO(hashasocmark)); 5769 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5770 &SCTP_BASE_INFO(hashmark)); 5771 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5772 &SCTP_BASE_INFO(hashtcpmark)); 5773 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5774 5775 5776 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5777 &SCTP_BASE_INFO(hashvrfmark)); 5778 5779 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5780 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5781 /* init the zones */ 5782 /* 5783 * FIX ME: Should check for NULL returns, but if it does fail we are 5784 * doomed to panic anyways... add later maybe. 5785 */ 5786 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5787 sizeof(struct sctp_inpcb), maxsockets); 5788 5789 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5790 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5791 5792 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5793 sizeof(struct sctp_laddr), 5794 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5795 5796 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5797 sizeof(struct sctp_nets), 5798 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5799 5800 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5801 sizeof(struct sctp_tmit_chunk), 5802 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5803 5804 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5805 sizeof(struct sctp_queued_to_read), 5806 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5807 5808 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5809 sizeof(struct sctp_stream_queue_pending), 5810 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5811 5812 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5813 sizeof(struct sctp_asconf), 5814 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5815 5816 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5817 sizeof(struct sctp_asconf_ack), 5818 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5819 5820 5821 /* Master Lock INIT for info structure */ 5822 SCTP_INP_INFO_LOCK_INIT(); 5823 SCTP_STATLOG_INIT_LOCK(); 5824 5825 SCTP_IPI_COUNT_INIT(); 5826 SCTP_IPI_ADDR_INIT(); 5827 #ifdef SCTP_PACKET_LOGGING 5828 SCTP_IP_PKTLOG_INIT(); 5829 #endif 5830 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5831 5832 SCTP_WQ_ADDR_INIT(); 5833 /* not sure if we need all the counts */ 5834 SCTP_BASE_INFO(ipi_count_ep) = 0; 5835 /* assoc/tcb zone info */ 5836 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5837 /* local addrlist zone info */ 5838 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5839 /* remote addrlist zone info */ 5840 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5841 /* chunk info */ 5842 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5843 5844 /* socket queue zone info */ 5845 SCTP_BASE_INFO(ipi_count_readq) = 0; 5846 5847 /* stream out queue cont */ 5848 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5849 5850 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5851 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5852 5853 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5854 5855 /* Init the TIMEWAIT list */ 5856 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5857 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5858 } 5859 sctp_startup_iterator(); 5860 5861 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5862 sctp_startup_mcore_threads(); 5863 #endif 5864 5865 /* 5866 * INIT the default VRF which for BSD is the only one, other O/S's 5867 * may have more. But initially they must start with one and then 5868 * add the VRF's as addresses are added. 5869 */ 5870 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5871 } 5872 5873 /* 5874 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5875 */ 5876 void 5877 sctp_pcb_finish(void) 5878 { 5879 struct sctp_vrflist *vrf_bucket; 5880 struct sctp_vrf *vrf, *nvrf; 5881 struct sctp_ifn *ifn, *nifn; 5882 struct sctp_ifa *ifa, *nifa; 5883 struct sctpvtaghead *chain; 5884 struct sctp_tagblock *twait_block, *prev_twait_block; 5885 struct sctp_laddr *wi, *nwi; 5886 int i; 5887 struct sctp_iterator *it, *nit; 5888 5889 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5890 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5891 return; 5892 } 5893 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5894 /* 5895 * In FreeBSD the iterator thread never exits but we do clean up. 5896 * The only way FreeBSD reaches here is if we have VRF's but we 5897 * still add the ifdef to make it compile on old versions. 5898 */ 5899 retry: 5900 SCTP_IPI_ITERATOR_WQ_LOCK(); 5901 /* 5902 * sctp_iterator_worker() might be working on an it entry without 5903 * holding the lock. We won't find it on the list either and 5904 * continue and free/destroy it. While holding the lock, spin, to 5905 * avoid the race condition as sctp_iterator_worker() will have to 5906 * wait to re-acquire the lock. 5907 */ 5908 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5909 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5910 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5911 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5912 DELAY(10); 5913 goto retry; 5914 } 5915 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5916 if (it->vn != curvnet) { 5917 continue; 5918 } 5919 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5920 if (it->function_atend != NULL) { 5921 (*it->function_atend) (it->pointer, it->val); 5922 } 5923 SCTP_FREE(it, SCTP_M_ITER); 5924 } 5925 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5926 SCTP_ITERATOR_LOCK(); 5927 if ((sctp_it_ctl.cur_it) && 5928 (sctp_it_ctl.cur_it->vn == curvnet)) { 5929 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5930 } 5931 SCTP_ITERATOR_UNLOCK(); 5932 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5933 SCTP_WQ_ADDR_LOCK(); 5934 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5935 LIST_REMOVE(wi, sctp_nxt_addr); 5936 SCTP_DECR_LADDR_COUNT(); 5937 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5938 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5939 } 5940 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5941 } 5942 SCTP_WQ_ADDR_UNLOCK(); 5943 5944 /* 5945 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5946 * destroyed first). 5947 */ 5948 SCTP_IPI_ADDR_WLOCK(); 5949 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5950 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5951 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5952 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5953 /* free the ifa */ 5954 LIST_REMOVE(ifa, next_bucket); 5955 LIST_REMOVE(ifa, next_ifa); 5956 SCTP_FREE(ifa, SCTP_M_IFA); 5957 } 5958 /* free the ifn */ 5959 LIST_REMOVE(ifn, next_bucket); 5960 LIST_REMOVE(ifn, next_ifn); 5961 SCTP_FREE(ifn, SCTP_M_IFN); 5962 } 5963 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5964 /* free the vrf */ 5965 LIST_REMOVE(vrf, next_vrf); 5966 SCTP_FREE(vrf, SCTP_M_VRF); 5967 } 5968 SCTP_IPI_ADDR_WUNLOCK(); 5969 /* free the vrf hashes */ 5970 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5971 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5972 5973 /* 5974 * free the TIMEWAIT list elements malloc'd in the function 5975 * sctp_add_vtag_to_timewait()... 5976 */ 5977 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5978 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5979 if (!LIST_EMPTY(chain)) { 5980 prev_twait_block = NULL; 5981 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5982 if (prev_twait_block) { 5983 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5984 } 5985 prev_twait_block = twait_block; 5986 } 5987 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5988 } 5989 } 5990 5991 /* free the locks and mutexes */ 5992 #ifdef SCTP_PACKET_LOGGING 5993 SCTP_IP_PKTLOG_DESTROY(); 5994 #endif 5995 SCTP_IPI_ADDR_DESTROY(); 5996 SCTP_STATLOG_DESTROY(); 5997 SCTP_INP_INFO_LOCK_DESTROY(); 5998 5999 SCTP_WQ_ADDR_DESTROY(); 6000 6001 /* Get rid of other stuff too. */ 6002 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6003 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6004 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6005 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6006 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6007 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6008 6009 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6010 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6011 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6012 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6013 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6014 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6015 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6016 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6017 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6018 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6019 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6020 #endif 6021 } 6022 6023 6024 int 6025 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6026 int offset, int limit, 6027 struct sockaddr *src, struct sockaddr *dst, 6028 struct sockaddr *altsa, uint16_t port) 6029 { 6030 /* 6031 * grub through the INIT pulling addresses and loading them to the 6032 * nets structure in the asoc. The from address in the mbuf should 6033 * also be loaded (if it is not already). This routine can be called 6034 * with either INIT or INIT-ACK's as long as the m points to the IP 6035 * packet and the offset points to the beginning of the parameters. 6036 */ 6037 struct sctp_inpcb *inp; 6038 struct sctp_nets *net, *nnet, *net_tmp; 6039 struct sctp_paramhdr *phdr, param_buf; 6040 struct sctp_tcb *stcb_tmp; 6041 uint16_t ptype, plen; 6042 struct sockaddr *sa; 6043 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6044 struct sctp_auth_random *p_random = NULL; 6045 uint16_t random_len = 0; 6046 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6047 struct sctp_auth_hmac_algo *hmacs = NULL; 6048 uint16_t hmacs_len = 0; 6049 uint8_t saw_asconf = 0; 6050 uint8_t saw_asconf_ack = 0; 6051 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6052 struct sctp_auth_chunk_list *chunks = NULL; 6053 uint16_t num_chunks = 0; 6054 sctp_key_t *new_key; 6055 uint32_t keylen; 6056 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6057 uint8_t peer_supports_ecn; 6058 uint8_t peer_supports_prsctp; 6059 uint8_t peer_supports_auth; 6060 uint8_t peer_supports_asconf; 6061 uint8_t peer_supports_asconf_ack; 6062 uint8_t peer_supports_reconfig; 6063 uint8_t peer_supports_nrsack; 6064 uint8_t peer_supports_pktdrop; 6065 uint8_t peer_supports_idata; 6066 #ifdef INET 6067 struct sockaddr_in sin; 6068 #endif 6069 #ifdef INET6 6070 struct sockaddr_in6 sin6; 6071 #endif 6072 6073 /* First get the destination address setup too. */ 6074 #ifdef INET 6075 memset(&sin, 0, sizeof(sin)); 6076 sin.sin_family = AF_INET; 6077 sin.sin_len = sizeof(sin); 6078 sin.sin_port = stcb->rport; 6079 #endif 6080 #ifdef INET6 6081 memset(&sin6, 0, sizeof(sin6)); 6082 sin6.sin6_family = AF_INET6; 6083 sin6.sin6_len = sizeof(struct sockaddr_in6); 6084 sin6.sin6_port = stcb->rport; 6085 #endif 6086 if (altsa) { 6087 sa = altsa; 6088 } else { 6089 sa = src; 6090 } 6091 peer_supports_idata = 0; 6092 peer_supports_ecn = 0; 6093 peer_supports_prsctp = 0; 6094 peer_supports_auth = 0; 6095 peer_supports_asconf = 0; 6096 peer_supports_reconfig = 0; 6097 peer_supports_nrsack = 0; 6098 peer_supports_pktdrop = 0; 6099 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6100 /* mark all addresses that we have currently on the list */ 6101 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6102 } 6103 /* does the source address already exist? if so skip it */ 6104 inp = stcb->sctp_ep; 6105 atomic_add_int(&stcb->asoc.refcnt, 1); 6106 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6107 atomic_add_int(&stcb->asoc.refcnt, -1); 6108 6109 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6110 /* we must add the source address */ 6111 /* no scope set here since we have a tcb already. */ 6112 switch (sa->sa_family) { 6113 #ifdef INET 6114 case AF_INET: 6115 if (stcb->asoc.scope.ipv4_addr_legal) { 6116 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6117 return (-1); 6118 } 6119 } 6120 break; 6121 #endif 6122 #ifdef INET6 6123 case AF_INET6: 6124 if (stcb->asoc.scope.ipv6_addr_legal) { 6125 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6126 return (-2); 6127 } 6128 } 6129 break; 6130 #endif 6131 default: 6132 break; 6133 } 6134 } else { 6135 if (net_tmp != NULL && stcb_tmp == stcb) { 6136 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6137 } else if (stcb_tmp != stcb) { 6138 /* It belongs to another association? */ 6139 if (stcb_tmp) 6140 SCTP_TCB_UNLOCK(stcb_tmp); 6141 return (-3); 6142 } 6143 } 6144 if (stcb->asoc.state == 0) { 6145 /* the assoc was freed? */ 6146 return (-4); 6147 } 6148 /* now we must go through each of the params. */ 6149 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6150 while (phdr) { 6151 ptype = ntohs(phdr->param_type); 6152 plen = ntohs(phdr->param_length); 6153 /* 6154 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6155 * (uint32_t)ptype, (int)plen); 6156 */ 6157 if (offset + plen > limit) { 6158 break; 6159 } 6160 if (plen < sizeof(struct sctp_paramhdr)) { 6161 break; 6162 } 6163 #ifdef INET 6164 if (ptype == SCTP_IPV4_ADDRESS) { 6165 if (stcb->asoc.scope.ipv4_addr_legal) { 6166 struct sctp_ipv4addr_param *p4, p4_buf; 6167 6168 /* ok get the v4 address and check/add */ 6169 phdr = sctp_get_next_param(m, offset, 6170 (struct sctp_paramhdr *)&p4_buf, 6171 sizeof(p4_buf)); 6172 if (plen != sizeof(struct sctp_ipv4addr_param) || 6173 phdr == NULL) { 6174 return (-5); 6175 } 6176 p4 = (struct sctp_ipv4addr_param *)phdr; 6177 sin.sin_addr.s_addr = p4->addr; 6178 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6179 /* Skip multi-cast addresses */ 6180 goto next_param; 6181 } 6182 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6183 (sin.sin_addr.s_addr == INADDR_ANY)) { 6184 goto next_param; 6185 } 6186 sa = (struct sockaddr *)&sin; 6187 inp = stcb->sctp_ep; 6188 atomic_add_int(&stcb->asoc.refcnt, 1); 6189 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6190 dst, stcb); 6191 atomic_add_int(&stcb->asoc.refcnt, -1); 6192 6193 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6194 inp == NULL) { 6195 /* we must add the source address */ 6196 /* 6197 * no scope set since we have a tcb 6198 * already 6199 */ 6200 6201 /* 6202 * we must validate the state again 6203 * here 6204 */ 6205 add_it_now: 6206 if (stcb->asoc.state == 0) { 6207 /* the assoc was freed? */ 6208 return (-7); 6209 } 6210 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6211 return (-8); 6212 } 6213 } else if (stcb_tmp == stcb) { 6214 if (stcb->asoc.state == 0) { 6215 /* the assoc was freed? */ 6216 return (-10); 6217 } 6218 if (net != NULL) { 6219 /* clear flag */ 6220 net->dest_state &= 6221 ~SCTP_ADDR_NOT_IN_ASSOC; 6222 } 6223 } else { 6224 /* 6225 * strange, address is in another 6226 * assoc? straighten out locks. 6227 */ 6228 if (stcb_tmp) { 6229 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6230 struct mbuf *op_err; 6231 char msg[SCTP_DIAG_INFO_LEN]; 6232 6233 /* 6234 * in setup state we 6235 * abort this guy 6236 */ 6237 SCTP_SNPRINTF(msg, sizeof(msg), 6238 "%s:%d at %s", __FILE__, __LINE__, __func__); 6239 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6240 msg); 6241 sctp_abort_an_association(stcb_tmp->sctp_ep, 6242 stcb_tmp, op_err, 6243 SCTP_SO_NOT_LOCKED); 6244 goto add_it_now; 6245 } 6246 SCTP_TCB_UNLOCK(stcb_tmp); 6247 } 6248 6249 if (stcb->asoc.state == 0) { 6250 /* the assoc was freed? */ 6251 return (-12); 6252 } 6253 return (-13); 6254 } 6255 } 6256 } else 6257 #endif 6258 #ifdef INET6 6259 if (ptype == SCTP_IPV6_ADDRESS) { 6260 if (stcb->asoc.scope.ipv6_addr_legal) { 6261 /* ok get the v6 address and check/add */ 6262 struct sctp_ipv6addr_param *p6, p6_buf; 6263 6264 phdr = sctp_get_next_param(m, offset, 6265 (struct sctp_paramhdr *)&p6_buf, 6266 sizeof(p6_buf)); 6267 if (plen != sizeof(struct sctp_ipv6addr_param) || 6268 phdr == NULL) { 6269 return (-14); 6270 } 6271 p6 = (struct sctp_ipv6addr_param *)phdr; 6272 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6273 sizeof(p6->addr)); 6274 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6275 /* Skip multi-cast addresses */ 6276 goto next_param; 6277 } 6278 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6279 /* 6280 * Link local make no sense without 6281 * scope 6282 */ 6283 goto next_param; 6284 } 6285 sa = (struct sockaddr *)&sin6; 6286 inp = stcb->sctp_ep; 6287 atomic_add_int(&stcb->asoc.refcnt, 1); 6288 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6289 dst, stcb); 6290 atomic_add_int(&stcb->asoc.refcnt, -1); 6291 if (stcb_tmp == NULL && 6292 (inp == stcb->sctp_ep || inp == NULL)) { 6293 /* 6294 * we must validate the state again 6295 * here 6296 */ 6297 add_it_now6: 6298 if (stcb->asoc.state == 0) { 6299 /* the assoc was freed? */ 6300 return (-16); 6301 } 6302 /* 6303 * we must add the address, no scope 6304 * set 6305 */ 6306 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6307 return (-17); 6308 } 6309 } else if (stcb_tmp == stcb) { 6310 /* 6311 * we must validate the state again 6312 * here 6313 */ 6314 if (stcb->asoc.state == 0) { 6315 /* the assoc was freed? */ 6316 return (-19); 6317 } 6318 if (net != NULL) { 6319 /* clear flag */ 6320 net->dest_state &= 6321 ~SCTP_ADDR_NOT_IN_ASSOC; 6322 } 6323 } else { 6324 /* 6325 * strange, address is in another 6326 * assoc? straighten out locks. 6327 */ 6328 if (stcb_tmp) { 6329 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6330 struct mbuf *op_err; 6331 char msg[SCTP_DIAG_INFO_LEN]; 6332 6333 /* 6334 * in setup state we 6335 * abort this guy 6336 */ 6337 SCTP_SNPRINTF(msg, sizeof(msg), 6338 "%s:%d at %s", __FILE__, __LINE__, __func__); 6339 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6340 msg); 6341 sctp_abort_an_association(stcb_tmp->sctp_ep, 6342 stcb_tmp, op_err, 6343 SCTP_SO_NOT_LOCKED); 6344 goto add_it_now6; 6345 } 6346 SCTP_TCB_UNLOCK(stcb_tmp); 6347 } 6348 if (stcb->asoc.state == 0) { 6349 /* the assoc was freed? */ 6350 return (-21); 6351 } 6352 return (-22); 6353 } 6354 } 6355 } else 6356 #endif 6357 if (ptype == SCTP_ECN_CAPABLE) { 6358 peer_supports_ecn = 1; 6359 } else if (ptype == SCTP_ULP_ADAPTATION) { 6360 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6361 struct sctp_adaptation_layer_indication ai, 6362 *aip; 6363 6364 phdr = sctp_get_next_param(m, offset, 6365 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6366 aip = (struct sctp_adaptation_layer_indication *)phdr; 6367 if (aip) { 6368 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6369 stcb->asoc.adaptation_needed = 1; 6370 } 6371 } 6372 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6373 struct sctp_asconf_addr_param lstore, *fee; 6374 int lptype; 6375 struct sockaddr *lsa = NULL; 6376 #ifdef INET 6377 struct sctp_asconf_addrv4_param *fii; 6378 #endif 6379 6380 if (stcb->asoc.asconf_supported == 0) { 6381 return (-100); 6382 } 6383 if (plen > sizeof(lstore)) { 6384 return (-23); 6385 } 6386 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6387 return (-101); 6388 } 6389 phdr = sctp_get_next_param(m, offset, 6390 (struct sctp_paramhdr *)&lstore, 6391 plen); 6392 if (phdr == NULL) { 6393 return (-24); 6394 } 6395 fee = (struct sctp_asconf_addr_param *)phdr; 6396 lptype = ntohs(fee->addrp.ph.param_type); 6397 switch (lptype) { 6398 #ifdef INET 6399 case SCTP_IPV4_ADDRESS: 6400 if (plen != 6401 sizeof(struct sctp_asconf_addrv4_param)) { 6402 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6403 (int)sizeof(struct sctp_asconf_addrv4_param), 6404 plen); 6405 } else { 6406 fii = (struct sctp_asconf_addrv4_param *)fee; 6407 sin.sin_addr.s_addr = fii->addrp.addr; 6408 lsa = (struct sockaddr *)&sin; 6409 } 6410 break; 6411 #endif 6412 #ifdef INET6 6413 case SCTP_IPV6_ADDRESS: 6414 if (plen != 6415 sizeof(struct sctp_asconf_addr_param)) { 6416 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6417 (int)sizeof(struct sctp_asconf_addr_param), 6418 plen); 6419 } else { 6420 memcpy(sin6.sin6_addr.s6_addr, 6421 fee->addrp.addr, 6422 sizeof(fee->addrp.addr)); 6423 lsa = (struct sockaddr *)&sin6; 6424 } 6425 break; 6426 #endif 6427 default: 6428 break; 6429 } 6430 if (lsa) { 6431 (void)sctp_set_primary_addr(stcb, sa, NULL); 6432 } 6433 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6434 stcb->asoc.peer_supports_nat = 1; 6435 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6436 /* Peer supports pr-sctp */ 6437 peer_supports_prsctp = 1; 6438 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6439 /* A supported extension chunk */ 6440 struct sctp_supported_chunk_types_param *pr_supported; 6441 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6442 int num_ent, i; 6443 6444 if (plen > sizeof(local_store)) { 6445 return (-35); 6446 } 6447 phdr = sctp_get_next_param(m, offset, 6448 (struct sctp_paramhdr *)&local_store, plen); 6449 if (phdr == NULL) { 6450 return (-25); 6451 } 6452 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6453 num_ent = plen - sizeof(struct sctp_paramhdr); 6454 for (i = 0; i < num_ent; i++) { 6455 switch (pr_supported->chunk_types[i]) { 6456 case SCTP_ASCONF: 6457 peer_supports_asconf = 1; 6458 break; 6459 case SCTP_ASCONF_ACK: 6460 peer_supports_asconf_ack = 1; 6461 break; 6462 case SCTP_FORWARD_CUM_TSN: 6463 peer_supports_prsctp = 1; 6464 break; 6465 case SCTP_PACKET_DROPPED: 6466 peer_supports_pktdrop = 1; 6467 break; 6468 case SCTP_NR_SELECTIVE_ACK: 6469 peer_supports_nrsack = 1; 6470 break; 6471 case SCTP_STREAM_RESET: 6472 peer_supports_reconfig = 1; 6473 break; 6474 case SCTP_AUTHENTICATION: 6475 peer_supports_auth = 1; 6476 break; 6477 case SCTP_IDATA: 6478 peer_supports_idata = 1; 6479 break; 6480 default: 6481 /* one I have not learned yet */ 6482 break; 6483 6484 } 6485 } 6486 } else if (ptype == SCTP_RANDOM) { 6487 if (plen > sizeof(random_store)) 6488 break; 6489 if (got_random) { 6490 /* already processed a RANDOM */ 6491 goto next_param; 6492 } 6493 phdr = sctp_get_next_param(m, offset, 6494 (struct sctp_paramhdr *)random_store, 6495 plen); 6496 if (phdr == NULL) 6497 return (-26); 6498 p_random = (struct sctp_auth_random *)phdr; 6499 random_len = plen - sizeof(*p_random); 6500 /* enforce the random length */ 6501 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6502 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6503 return (-27); 6504 } 6505 got_random = 1; 6506 } else if (ptype == SCTP_HMAC_LIST) { 6507 uint16_t num_hmacs; 6508 uint16_t i; 6509 6510 if (plen > sizeof(hmacs_store)) 6511 break; 6512 if (got_hmacs) { 6513 /* already processed a HMAC list */ 6514 goto next_param; 6515 } 6516 phdr = sctp_get_next_param(m, offset, 6517 (struct sctp_paramhdr *)hmacs_store, 6518 plen); 6519 if (phdr == NULL) 6520 return (-28); 6521 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6522 hmacs_len = plen - sizeof(*hmacs); 6523 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6524 /* validate the hmac list */ 6525 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6526 return (-29); 6527 } 6528 if (stcb->asoc.peer_hmacs != NULL) 6529 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6530 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6531 if (stcb->asoc.peer_hmacs != NULL) { 6532 for (i = 0; i < num_hmacs; i++) { 6533 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6534 ntohs(hmacs->hmac_ids[i])); 6535 } 6536 } 6537 got_hmacs = 1; 6538 } else if (ptype == SCTP_CHUNK_LIST) { 6539 int i; 6540 6541 if (plen > sizeof(chunks_store)) 6542 break; 6543 if (got_chklist) { 6544 /* already processed a Chunks list */ 6545 goto next_param; 6546 } 6547 phdr = sctp_get_next_param(m, offset, 6548 (struct sctp_paramhdr *)chunks_store, 6549 plen); 6550 if (phdr == NULL) 6551 return (-30); 6552 chunks = (struct sctp_auth_chunk_list *)phdr; 6553 num_chunks = plen - sizeof(*chunks); 6554 if (stcb->asoc.peer_auth_chunks != NULL) 6555 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6556 else 6557 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6558 for (i = 0; i < num_chunks; i++) { 6559 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6560 stcb->asoc.peer_auth_chunks); 6561 /* record asconf/asconf-ack if listed */ 6562 if (chunks->chunk_types[i] == SCTP_ASCONF) 6563 saw_asconf = 1; 6564 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6565 saw_asconf_ack = 1; 6566 6567 } 6568 got_chklist = 1; 6569 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6570 (ptype == SCTP_STATE_COOKIE) || 6571 (ptype == SCTP_UNRECOG_PARAM) || 6572 (ptype == SCTP_COOKIE_PRESERVE) || 6573 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6574 (ptype == SCTP_ADD_IP_ADDRESS) || 6575 (ptype == SCTP_DEL_IP_ADDRESS) || 6576 (ptype == SCTP_ERROR_CAUSE_IND) || 6577 (ptype == SCTP_SUCCESS_REPORT)) { 6578 /* don't care */ ; 6579 } else { 6580 if ((ptype & 0x8000) == 0x0000) { 6581 /* 6582 * must stop processing the rest of the 6583 * param's. Any report bits were handled 6584 * with the call to 6585 * sctp_arethere_unrecognized_parameters() 6586 * when the INIT or INIT-ACK was first seen. 6587 */ 6588 break; 6589 } 6590 } 6591 6592 next_param: 6593 offset += SCTP_SIZE32(plen); 6594 if (offset >= limit) { 6595 break; 6596 } 6597 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6598 sizeof(param_buf)); 6599 } 6600 /* Now check to see if we need to purge any addresses */ 6601 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6602 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6603 SCTP_ADDR_NOT_IN_ASSOC) { 6604 /* This address has been removed from the asoc */ 6605 /* remove and free it */ 6606 stcb->asoc.numnets--; 6607 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6608 sctp_free_remote_addr(net); 6609 if (net == stcb->asoc.primary_destination) { 6610 stcb->asoc.primary_destination = NULL; 6611 sctp_select_primary_destination(stcb); 6612 } 6613 } 6614 } 6615 if ((stcb->asoc.ecn_supported == 1) && 6616 (peer_supports_ecn == 0)) { 6617 stcb->asoc.ecn_supported = 0; 6618 } 6619 if ((stcb->asoc.prsctp_supported == 1) && 6620 (peer_supports_prsctp == 0)) { 6621 stcb->asoc.prsctp_supported = 0; 6622 } 6623 if ((stcb->asoc.auth_supported == 1) && 6624 ((peer_supports_auth == 0) || 6625 (got_random == 0) || (got_hmacs == 0))) { 6626 stcb->asoc.auth_supported = 0; 6627 } 6628 if ((stcb->asoc.asconf_supported == 1) && 6629 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6630 (stcb->asoc.auth_supported == 0) || 6631 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6632 stcb->asoc.asconf_supported = 0; 6633 } 6634 if ((stcb->asoc.reconfig_supported == 1) && 6635 (peer_supports_reconfig == 0)) { 6636 stcb->asoc.reconfig_supported = 0; 6637 } 6638 if ((stcb->asoc.idata_supported == 1) && 6639 (peer_supports_idata == 0)) { 6640 stcb->asoc.idata_supported = 0; 6641 } 6642 if ((stcb->asoc.nrsack_supported == 1) && 6643 (peer_supports_nrsack == 0)) { 6644 stcb->asoc.nrsack_supported = 0; 6645 } 6646 if ((stcb->asoc.pktdrop_supported == 1) && 6647 (peer_supports_pktdrop == 0)) { 6648 stcb->asoc.pktdrop_supported = 0; 6649 } 6650 /* validate authentication required parameters */ 6651 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6652 /* peer does not support auth but sent a chunks list? */ 6653 return (-31); 6654 } 6655 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6656 /* peer supports asconf but not auth? */ 6657 return (-32); 6658 } else if ((peer_supports_asconf == 1) && 6659 (peer_supports_auth == 1) && 6660 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6661 return (-33); 6662 } 6663 /* concatenate the full random key */ 6664 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6665 if (chunks != NULL) { 6666 keylen += sizeof(*chunks) + num_chunks; 6667 } 6668 new_key = sctp_alloc_key(keylen); 6669 if (new_key != NULL) { 6670 /* copy in the RANDOM */ 6671 if (p_random != NULL) { 6672 keylen = sizeof(*p_random) + random_len; 6673 memcpy(new_key->key, p_random, keylen); 6674 } else { 6675 keylen = 0; 6676 } 6677 /* append in the AUTH chunks */ 6678 if (chunks != NULL) { 6679 memcpy(new_key->key + keylen, chunks, 6680 sizeof(*chunks) + num_chunks); 6681 keylen += sizeof(*chunks) + num_chunks; 6682 } 6683 /* append in the HMACs */ 6684 if (hmacs != NULL) { 6685 memcpy(new_key->key + keylen, hmacs, 6686 sizeof(*hmacs) + hmacs_len); 6687 } 6688 } else { 6689 /* failed to get memory for the key */ 6690 return (-34); 6691 } 6692 if (stcb->asoc.authinfo.peer_random != NULL) 6693 sctp_free_key(stcb->asoc.authinfo.peer_random); 6694 stcb->asoc.authinfo.peer_random = new_key; 6695 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6696 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6697 6698 return (0); 6699 } 6700 6701 int 6702 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6703 struct sctp_nets *net) 6704 { 6705 /* make sure the requested primary address exists in the assoc */ 6706 if (net == NULL && sa) 6707 net = sctp_findnet(stcb, sa); 6708 6709 if (net == NULL) { 6710 /* didn't find the requested primary address! */ 6711 return (-1); 6712 } else { 6713 /* set the primary address */ 6714 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6715 /* Must be confirmed, so queue to set */ 6716 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6717 return (0); 6718 } 6719 stcb->asoc.primary_destination = net; 6720 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6721 sctp_free_remote_addr(stcb->asoc.alternate); 6722 stcb->asoc.alternate = NULL; 6723 } 6724 net = TAILQ_FIRST(&stcb->asoc.nets); 6725 if (net != stcb->asoc.primary_destination) { 6726 /* 6727 * first one on the list is NOT the primary 6728 * sctp_cmpaddr() is much more efficient if the 6729 * primary is the first on the list, make it so. 6730 */ 6731 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6732 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6733 } 6734 return (0); 6735 } 6736 } 6737 6738 int 6739 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6740 { 6741 /* 6742 * This function serves two purposes. It will see if a TAG can be 6743 * re-used and return 1 for yes it is ok and 0 for don't use that 6744 * tag. A secondary function it will do is purge out old tags that 6745 * can be removed. 6746 */ 6747 struct sctpvtaghead *chain; 6748 struct sctp_tagblock *twait_block; 6749 struct sctpasochead *head; 6750 struct sctp_tcb *stcb; 6751 int i; 6752 6753 SCTP_INP_INFO_RLOCK(); 6754 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6755 SCTP_BASE_INFO(hashasocmark))]; 6756 LIST_FOREACH(stcb, head, sctp_asocs) { 6757 /* 6758 * We choose not to lock anything here. TCB's can't be 6759 * removed since we have the read lock, so they can't be 6760 * freed on us, same thing for the INP. I may be wrong with 6761 * this assumption, but we will go with it for now :-) 6762 */ 6763 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6764 continue; 6765 } 6766 if (stcb->asoc.my_vtag == tag) { 6767 /* candidate */ 6768 if (stcb->rport != rport) { 6769 continue; 6770 } 6771 if (stcb->sctp_ep->sctp_lport != lport) { 6772 continue; 6773 } 6774 /* Its a used tag set */ 6775 SCTP_INP_INFO_RUNLOCK(); 6776 return (0); 6777 } 6778 } 6779 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6780 /* Now what about timed wait ? */ 6781 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6782 /* 6783 * Block(s) are present, lets see if we have this tag in the 6784 * list 6785 */ 6786 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6787 if (twait_block->vtag_block[i].v_tag == 0) { 6788 /* not used */ 6789 continue; 6790 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6791 now->tv_sec) { 6792 /* Audit expires this guy */ 6793 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6794 twait_block->vtag_block[i].v_tag = 0; 6795 twait_block->vtag_block[i].lport = 0; 6796 twait_block->vtag_block[i].rport = 0; 6797 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6798 (twait_block->vtag_block[i].lport == lport) && 6799 (twait_block->vtag_block[i].rport == rport)) { 6800 /* Bad tag, sorry :< */ 6801 SCTP_INP_INFO_RUNLOCK(); 6802 return (0); 6803 } 6804 } 6805 } 6806 SCTP_INP_INFO_RUNLOCK(); 6807 return (1); 6808 } 6809 6810 static void 6811 sctp_drain_mbufs(struct sctp_tcb *stcb) 6812 { 6813 /* 6814 * We must hunt this association for MBUF's past the cumack (i.e. 6815 * out of order data that we can renege on). 6816 */ 6817 struct sctp_association *asoc; 6818 struct sctp_tmit_chunk *chk, *nchk; 6819 uint32_t cumulative_tsn_p1; 6820 struct sctp_queued_to_read *control, *ncontrol; 6821 int cnt, strmat; 6822 uint32_t gap, i; 6823 int fnd = 0; 6824 6825 /* We look for anything larger than the cum-ack + 1 */ 6826 6827 asoc = &stcb->asoc; 6828 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6829 /* none we can reneg on. */ 6830 return; 6831 } 6832 SCTP_STAT_INCR(sctps_protocol_drains_done); 6833 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6834 cnt = 0; 6835 /* Ok that was fun, now we will drain all the inbound streams? */ 6836 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6837 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6838 #ifdef INVARIANTS 6839 if (control->on_strm_q != SCTP_ON_ORDERED) { 6840 panic("Huh control: %p on_q: %d -- not ordered?", 6841 control, control->on_strm_q); 6842 } 6843 #endif 6844 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6845 /* Yep it is above cum-ack */ 6846 cnt++; 6847 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6848 KASSERT(control->length > 0, ("control has zero length")); 6849 if (asoc->size_on_all_streams >= control->length) { 6850 asoc->size_on_all_streams -= control->length; 6851 } else { 6852 #ifdef INVARIANTS 6853 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6854 #else 6855 asoc->size_on_all_streams = 0; 6856 #endif 6857 } 6858 sctp_ucount_decr(asoc->cnt_on_all_streams); 6859 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6860 if (control->on_read_q) { 6861 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6862 control->on_read_q = 0; 6863 } 6864 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6865 control->on_strm_q = 0; 6866 if (control->data) { 6867 sctp_m_freem(control->data); 6868 control->data = NULL; 6869 } 6870 sctp_free_remote_addr(control->whoFrom); 6871 /* Now its reasm? */ 6872 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6873 cnt++; 6874 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6875 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6876 if (asoc->size_on_reasm_queue >= chk->send_size) { 6877 asoc->size_on_reasm_queue -= chk->send_size; 6878 } else { 6879 #ifdef INVARIANTS 6880 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6881 #else 6882 asoc->size_on_reasm_queue = 0; 6883 #endif 6884 } 6885 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6886 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6887 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6888 if (chk->data) { 6889 sctp_m_freem(chk->data); 6890 chk->data = NULL; 6891 } 6892 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6893 } 6894 sctp_free_a_readq(stcb, control); 6895 } 6896 } 6897 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6898 #ifdef INVARIANTS 6899 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6900 panic("Huh control: %p on_q: %d -- not unordered?", 6901 control, control->on_strm_q); 6902 } 6903 #endif 6904 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6905 /* Yep it is above cum-ack */ 6906 cnt++; 6907 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6908 KASSERT(control->length > 0, ("control has zero length")); 6909 if (asoc->size_on_all_streams >= control->length) { 6910 asoc->size_on_all_streams -= control->length; 6911 } else { 6912 #ifdef INVARIANTS 6913 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6914 #else 6915 asoc->size_on_all_streams = 0; 6916 #endif 6917 } 6918 sctp_ucount_decr(asoc->cnt_on_all_streams); 6919 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6920 if (control->on_read_q) { 6921 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6922 control->on_read_q = 0; 6923 } 6924 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6925 control->on_strm_q = 0; 6926 if (control->data) { 6927 sctp_m_freem(control->data); 6928 control->data = NULL; 6929 } 6930 sctp_free_remote_addr(control->whoFrom); 6931 /* Now its reasm? */ 6932 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6933 cnt++; 6934 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6935 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6936 if (asoc->size_on_reasm_queue >= chk->send_size) { 6937 asoc->size_on_reasm_queue -= chk->send_size; 6938 } else { 6939 #ifdef INVARIANTS 6940 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6941 #else 6942 asoc->size_on_reasm_queue = 0; 6943 #endif 6944 } 6945 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6946 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6947 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6948 if (chk->data) { 6949 sctp_m_freem(chk->data); 6950 chk->data = NULL; 6951 } 6952 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6953 } 6954 sctp_free_a_readq(stcb, control); 6955 } 6956 } 6957 } 6958 if (cnt) { 6959 /* We must back down to see what the new highest is */ 6960 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6961 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6962 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6963 asoc->highest_tsn_inside_map = i; 6964 fnd = 1; 6965 break; 6966 } 6967 } 6968 if (!fnd) { 6969 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6970 } 6971 6972 /* 6973 * Question, should we go through the delivery queue? The 6974 * only reason things are on here is the app not reading OR 6975 * a p-d-api up. An attacker COULD send enough in to 6976 * initiate the PD-API and then send a bunch of stuff to 6977 * other streams... these would wind up on the delivery 6978 * queue.. and then we would not get to them. But in order 6979 * to do this I then have to back-track and un-deliver 6980 * sequence numbers in streams.. el-yucko. I think for now 6981 * we will NOT look at the delivery queue and leave it to be 6982 * something to consider later. An alternative would be to 6983 * abort the P-D-API with a notification and then deliver 6984 * the data.... Or another method might be to keep track of 6985 * how many times the situation occurs and if we see a 6986 * possible attack underway just abort the association. 6987 */ 6988 #ifdef SCTP_DEBUG 6989 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6990 #endif 6991 /* 6992 * Now do we need to find a new 6993 * asoc->highest_tsn_inside_map? 6994 */ 6995 asoc->last_revoke_count = cnt; 6996 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6997 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6998 /* sa_ignore NO_NULL_CHK */ 6999 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 7000 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 7001 } 7002 /* 7003 * Another issue, in un-setting the TSN's in the mapping array we 7004 * DID NOT adjust the highest_tsn marker. This will cause one of 7005 * two things to occur. It may cause us to do extra work in checking 7006 * for our mapping array movement. More importantly it may cause us 7007 * to SACK every datagram. This may not be a bad thing though since 7008 * we will recover once we get our cum-ack above and all this stuff 7009 * we dumped recovered. 7010 */ 7011 } 7012 7013 void 7014 sctp_drain() 7015 { 7016 /* 7017 * We must walk the PCB lists for ALL associations here. The system 7018 * is LOW on MBUF's and needs help. This is where reneging will 7019 * occur. We really hope this does NOT happen! 7020 */ 7021 VNET_ITERATOR_DECL(vnet_iter); 7022 VNET_LIST_RLOCK_NOSLEEP(); 7023 VNET_FOREACH(vnet_iter) { 7024 CURVNET_SET(vnet_iter); 7025 struct sctp_inpcb *inp; 7026 struct sctp_tcb *stcb; 7027 7028 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7029 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7030 #ifdef VIMAGE 7031 continue; 7032 #else 7033 return; 7034 #endif 7035 } 7036 SCTP_INP_INFO_RLOCK(); 7037 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7038 /* For each endpoint */ 7039 SCTP_INP_RLOCK(inp); 7040 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7041 /* For each association */ 7042 SCTP_TCB_LOCK(stcb); 7043 sctp_drain_mbufs(stcb); 7044 SCTP_TCB_UNLOCK(stcb); 7045 } 7046 SCTP_INP_RUNLOCK(inp); 7047 } 7048 SCTP_INP_INFO_RUNLOCK(); 7049 CURVNET_RESTORE(); 7050 } 7051 VNET_LIST_RUNLOCK_NOSLEEP(); 7052 } 7053 7054 /* 7055 * start a new iterator 7056 * iterates through all endpoints and associations based on the pcb_state 7057 * flags and asoc_state. "af" (mandatory) is executed for all matching 7058 * assocs and "ef" (optional) is executed when the iterator completes. 7059 * "inpf" (optional) is executed for each new endpoint as it is being 7060 * iterated through. inpe (optional) is called when the inp completes 7061 * its way through all the stcbs. 7062 */ 7063 int 7064 sctp_initiate_iterator(inp_func inpf, 7065 asoc_func af, 7066 inp_func inpe, 7067 uint32_t pcb_state, 7068 uint32_t pcb_features, 7069 uint32_t asoc_state, 7070 void *argp, 7071 uint32_t argi, 7072 end_func ef, 7073 struct sctp_inpcb *s_inp, 7074 uint8_t chunk_output_off) 7075 { 7076 struct sctp_iterator *it = NULL; 7077 7078 if (af == NULL) { 7079 return (-1); 7080 } 7081 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7082 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7083 SCTP_BASE_VAR(sctp_pcb_initialized)); 7084 return (-1); 7085 } 7086 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7087 SCTP_M_ITER); 7088 if (it == NULL) { 7089 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7090 return (-1); 7091 } 7092 memset(it, 0, sizeof(*it)); 7093 it->function_assoc = af; 7094 it->function_inp = inpf; 7095 if (inpf) 7096 it->done_current_ep = 0; 7097 else 7098 it->done_current_ep = 1; 7099 it->function_atend = ef; 7100 it->pointer = argp; 7101 it->val = argi; 7102 it->pcb_flags = pcb_state; 7103 it->pcb_features = pcb_features; 7104 it->asoc_state = asoc_state; 7105 it->function_inp_end = inpe; 7106 it->no_chunk_output = chunk_output_off; 7107 it->vn = curvnet; 7108 if (s_inp) { 7109 /* Assume lock is held here */ 7110 it->inp = s_inp; 7111 SCTP_INP_INCR_REF(it->inp); 7112 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7113 } else { 7114 SCTP_INP_INFO_RLOCK(); 7115 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7116 if (it->inp) { 7117 SCTP_INP_INCR_REF(it->inp); 7118 } 7119 SCTP_INP_INFO_RUNLOCK(); 7120 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7121 7122 } 7123 SCTP_IPI_ITERATOR_WQ_LOCK(); 7124 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7125 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7126 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7127 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7128 SCTP_FREE(it, SCTP_M_ITER); 7129 return (-1); 7130 } 7131 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7132 if (sctp_it_ctl.iterator_running == 0) { 7133 sctp_wakeup_iterator(); 7134 } 7135 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7136 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7137 return (0); 7138 } 7139