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 (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3549 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3550 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3551 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3552 } 3553 cnt++; 3554 SCTP_TCB_UNLOCK(asoc); 3555 continue; 3556 } 3557 /* Free associations that are NOT killing us */ 3558 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3559 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3560 struct mbuf *op_err; 3561 3562 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3563 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3564 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3565 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3566 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3567 cnt++; 3568 SCTP_TCB_UNLOCK(asoc); 3569 continue; 3570 } 3571 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3572 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3573 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3574 } 3575 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3576 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3577 cnt++; 3578 } 3579 } 3580 if (cnt) { 3581 /* Ok we have someone out there that will kill us */ 3582 #ifdef SCTP_LOG_CLOSING 3583 sctp_log_closing(inp, NULL, 3); 3584 #endif 3585 SCTP_INP_WUNLOCK(inp); 3586 SCTP_ASOC_CREATE_UNLOCK(inp); 3587 SCTP_INP_INFO_WUNLOCK(); 3588 return; 3589 } 3590 if (SCTP_INP_LOCK_CONTENDED(inp)) 3591 being_refed++; 3592 if (SCTP_INP_READ_CONTENDED(inp)) 3593 being_refed++; 3594 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3595 being_refed++; 3596 /* NOTE: 0 refcount also means no timers are referencing us. */ 3597 if ((inp->refcount) || 3598 (being_refed) || 3599 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3600 #ifdef SCTP_LOG_CLOSING 3601 sctp_log_closing(inp, NULL, 4); 3602 #endif 3603 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3604 SCTP_INP_WUNLOCK(inp); 3605 SCTP_ASOC_CREATE_UNLOCK(inp); 3606 SCTP_INP_INFO_WUNLOCK(); 3607 return; 3608 } 3609 inp->sctp_ep.signature_change.type = 0; 3610 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3611 /* 3612 * Remove it from the list .. last thing we need a lock for. 3613 */ 3614 LIST_REMOVE(inp, sctp_list); 3615 SCTP_INP_WUNLOCK(inp); 3616 SCTP_ASOC_CREATE_UNLOCK(inp); 3617 SCTP_INP_INFO_WUNLOCK(); 3618 3619 #ifdef SCTP_LOG_CLOSING 3620 sctp_log_closing(inp, NULL, 5); 3621 #endif 3622 3623 3624 if ((inp->sctp_asocidhash) != NULL) { 3625 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3626 inp->sctp_asocidhash = NULL; 3627 } 3628 /* sa_ignore FREED_MEMORY */ 3629 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3630 /* Its only abandoned if it had data left */ 3631 if (sq->length) 3632 SCTP_STAT_INCR(sctps_left_abandon); 3633 3634 TAILQ_REMOVE(&inp->read_queue, sq, next); 3635 sctp_free_remote_addr(sq->whoFrom); 3636 if (so) 3637 so->so_rcv.sb_cc -= sq->length; 3638 if (sq->data) { 3639 sctp_m_freem(sq->data); 3640 sq->data = NULL; 3641 } 3642 /* 3643 * no need to free the net count, since at this point all 3644 * assoc's are gone. 3645 */ 3646 sctp_free_a_readq(NULL, sq); 3647 } 3648 /* Now the sctp_pcb things */ 3649 /* 3650 * free each asoc if it is not already closed/free. we can't use the 3651 * macro here since le_next will get freed as part of the 3652 * sctp_free_assoc() call. 3653 */ 3654 if (ip_pcb->inp_options) { 3655 (void)sctp_m_free(ip_pcb->inp_options); 3656 ip_pcb->inp_options = 0; 3657 } 3658 3659 3660 #ifdef INET6 3661 if (ip_pcb->inp_vflag & INP_IPV6) { 3662 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3663 } 3664 #endif /* INET6 */ 3665 ip_pcb->inp_vflag = 0; 3666 /* free up authentication fields */ 3667 if (inp->sctp_ep.local_auth_chunks != NULL) 3668 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3669 if (inp->sctp_ep.local_hmacs != NULL) 3670 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3671 3672 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3673 LIST_REMOVE(shared_key, next); 3674 sctp_free_sharedkey(shared_key); 3675 /* sa_ignore FREED_MEMORY */ 3676 } 3677 3678 /* 3679 * if we have an address list the following will free the list of 3680 * ifaddr's that are set into this ep. Again macro limitations here, 3681 * since the LIST_FOREACH could be a bad idea. 3682 */ 3683 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3684 sctp_remove_laddr(laddr); 3685 } 3686 3687 #ifdef SCTP_TRACK_FREED_ASOCS 3688 /* TEMP CODE */ 3689 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3690 LIST_REMOVE(asoc, sctp_tcblist); 3691 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3692 SCTP_DECR_ASOC_COUNT(); 3693 } 3694 /* *** END TEMP CODE *** */ 3695 #endif 3696 /* Now lets see about freeing the EP hash table. */ 3697 if (inp->sctp_tcbhash != NULL) { 3698 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3699 inp->sctp_tcbhash = NULL; 3700 } 3701 /* Now we must put the ep memory back into the zone pool */ 3702 crfree(inp->ip_inp.inp.inp_cred); 3703 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3704 SCTP_INP_LOCK_DESTROY(inp); 3705 SCTP_INP_READ_DESTROY(inp); 3706 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3707 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3708 SCTP_DECR_EP_COUNT(); 3709 } 3710 3711 3712 struct sctp_nets * 3713 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3714 { 3715 struct sctp_nets *net; 3716 3717 /* locate the address */ 3718 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3719 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3720 return (net); 3721 } 3722 return (NULL); 3723 } 3724 3725 3726 int 3727 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3728 { 3729 struct sctp_ifa *sctp_ifa; 3730 3731 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3732 if (sctp_ifa) { 3733 return (1); 3734 } else { 3735 return (0); 3736 } 3737 } 3738 3739 /* 3740 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3741 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3742 * stats of stuff. 3743 */ 3744 int 3745 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3746 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3747 { 3748 /* 3749 * The following is redundant to the same lines in the 3750 * sctp_aloc_assoc() but is needed since others call the add address 3751 * function 3752 */ 3753 struct sctp_nets *net, *netfirst; 3754 int addr_inscope; 3755 3756 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3757 from); 3758 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3759 3760 netfirst = sctp_findnet(stcb, newaddr); 3761 if (netfirst) { 3762 /* 3763 * Lie and return ok, we don't want to make the association 3764 * go away for this behavior. It will happen in the TCP 3765 * model in a connected socket. It does not reach the hash 3766 * table until after the association is built so it can't be 3767 * found. Mark as reachable, since the initial creation will 3768 * have been cleared and the NOT_IN_ASSOC flag will have 3769 * been added... and we don't want to end up removing it 3770 * back out. 3771 */ 3772 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3773 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3774 SCTP_ADDR_UNCONFIRMED); 3775 } else { 3776 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3777 } 3778 3779 return (0); 3780 } 3781 addr_inscope = 1; 3782 switch (newaddr->sa_family) { 3783 #ifdef INET 3784 case AF_INET: 3785 { 3786 struct sockaddr_in *sin; 3787 3788 sin = (struct sockaddr_in *)newaddr; 3789 if (sin->sin_addr.s_addr == 0) { 3790 /* Invalid address */ 3791 return (-1); 3792 } 3793 /* zero out the zero area */ 3794 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3795 3796 /* assure len is set */ 3797 sin->sin_len = sizeof(struct sockaddr_in); 3798 if (set_scope) { 3799 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3800 stcb->asoc.scope.ipv4_local_scope = 1; 3801 } 3802 } else { 3803 /* Validate the address is in scope */ 3804 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3805 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3806 addr_inscope = 0; 3807 } 3808 } 3809 break; 3810 } 3811 #endif 3812 #ifdef INET6 3813 case AF_INET6: 3814 { 3815 struct sockaddr_in6 *sin6; 3816 3817 sin6 = (struct sockaddr_in6 *)newaddr; 3818 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3819 /* Invalid address */ 3820 return (-1); 3821 } 3822 /* assure len is set */ 3823 sin6->sin6_len = sizeof(struct sockaddr_in6); 3824 if (set_scope) { 3825 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3826 stcb->asoc.scope.loopback_scope = 1; 3827 stcb->asoc.scope.local_scope = 0; 3828 stcb->asoc.scope.ipv4_local_scope = 1; 3829 stcb->asoc.scope.site_scope = 1; 3830 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3831 /* 3832 * If the new destination is a 3833 * LINK_LOCAL we must have common 3834 * site scope. Don't set the local 3835 * scope since we may not share all 3836 * links, only loopback can do this. 3837 * Links on the local network would 3838 * also be on our private network 3839 * for v4 too. 3840 */ 3841 stcb->asoc.scope.ipv4_local_scope = 1; 3842 stcb->asoc.scope.site_scope = 1; 3843 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3844 /* 3845 * If the new destination is 3846 * SITE_LOCAL then we must have site 3847 * scope in common. 3848 */ 3849 stcb->asoc.scope.site_scope = 1; 3850 } 3851 } else { 3852 /* Validate the address is in scope */ 3853 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3854 (stcb->asoc.scope.loopback_scope == 0)) { 3855 addr_inscope = 0; 3856 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3857 (stcb->asoc.scope.local_scope == 0)) { 3858 addr_inscope = 0; 3859 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3860 (stcb->asoc.scope.site_scope == 0)) { 3861 addr_inscope = 0; 3862 } 3863 } 3864 break; 3865 } 3866 #endif 3867 default: 3868 /* not supported family type */ 3869 return (-1); 3870 } 3871 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3872 if (net == NULL) { 3873 return (-1); 3874 } 3875 SCTP_INCR_RADDR_COUNT(); 3876 memset(net, 0, sizeof(struct sctp_nets)); 3877 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3878 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3879 switch (newaddr->sa_family) { 3880 #ifdef INET 3881 case AF_INET: 3882 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3883 break; 3884 #endif 3885 #ifdef INET6 3886 case AF_INET6: 3887 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3888 break; 3889 #endif 3890 default: 3891 break; 3892 } 3893 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3894 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3895 stcb->asoc.scope.loopback_scope = 1; 3896 stcb->asoc.scope.ipv4_local_scope = 1; 3897 stcb->asoc.scope.local_scope = 0; 3898 stcb->asoc.scope.site_scope = 1; 3899 addr_inscope = 1; 3900 } 3901 net->failure_threshold = stcb->asoc.def_net_failure; 3902 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3903 if (addr_inscope == 0) { 3904 net->dest_state = (SCTP_ADDR_REACHABLE | 3905 SCTP_ADDR_OUT_OF_SCOPE); 3906 } else { 3907 if (from == SCTP_ADDR_IS_CONFIRMED) 3908 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3909 net->dest_state = SCTP_ADDR_REACHABLE; 3910 else 3911 net->dest_state = SCTP_ADDR_REACHABLE | 3912 SCTP_ADDR_UNCONFIRMED; 3913 } 3914 /* 3915 * We set this to 0, the timer code knows that this means its an 3916 * initial value 3917 */ 3918 net->rto_needed = 1; 3919 net->RTO = 0; 3920 net->RTO_measured = 0; 3921 stcb->asoc.numnets++; 3922 net->ref_count = 1; 3923 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3924 net->port = port; 3925 net->dscp = stcb->asoc.default_dscp; 3926 #ifdef INET6 3927 net->flowlabel = stcb->asoc.default_flowlabel; 3928 #endif 3929 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3930 net->dest_state |= SCTP_ADDR_NOHB; 3931 } else { 3932 net->dest_state &= ~SCTP_ADDR_NOHB; 3933 } 3934 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3935 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3936 } else { 3937 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3938 } 3939 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3940 /* Init the timer structure */ 3941 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3942 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3943 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3944 3945 /* Now generate a route for this guy */ 3946 #ifdef INET6 3947 /* KAME hack: embed scopeid */ 3948 if (newaddr->sa_family == AF_INET6) { 3949 struct sockaddr_in6 *sin6; 3950 3951 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3952 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3953 sin6->sin6_scope_id = 0; 3954 } 3955 #endif 3956 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3957 stcb->asoc.vrf_id, 3958 stcb->sctp_ep->fibnum); 3959 3960 net->src_addr_selected = 0; 3961 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3962 /* Get source address */ 3963 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3964 stcb, 3965 (sctp_route_t *)&net->ro, 3966 net, 3967 0, 3968 stcb->asoc.vrf_id); 3969 if (stcb->asoc.default_mtu > 0) { 3970 net->mtu = stcb->asoc.default_mtu; 3971 switch (net->ro._l_addr.sa.sa_family) { 3972 #ifdef INET 3973 case AF_INET: 3974 net->mtu += SCTP_MIN_V4_OVERHEAD; 3975 break; 3976 #endif 3977 #ifdef INET6 3978 case AF_INET6: 3979 net->mtu += SCTP_MIN_OVERHEAD; 3980 break; 3981 #endif 3982 default: 3983 break; 3984 } 3985 #if defined(INET) || defined(INET6) 3986 if (net->port) { 3987 net->mtu += (uint32_t)sizeof(struct udphdr); 3988 } 3989 #endif 3990 } else if (net->ro._s_addr != NULL) { 3991 uint32_t imtu, rmtu, hcmtu; 3992 3993 net->src_addr_selected = 1; 3994 /* Now get the interface MTU */ 3995 if (net->ro._s_addr->ifn_p != NULL) { 3996 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3997 } else { 3998 imtu = 0; 3999 } 4000 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 4001 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 4002 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 4003 } 4004 } 4005 if (net->mtu == 0) { 4006 if (stcb->asoc.default_mtu > 0) { 4007 net->mtu = stcb->asoc.default_mtu; 4008 switch (net->ro._l_addr.sa.sa_family) { 4009 #ifdef INET 4010 case AF_INET: 4011 net->mtu += SCTP_MIN_V4_OVERHEAD; 4012 break; 4013 #endif 4014 #ifdef INET6 4015 case AF_INET6: 4016 net->mtu += SCTP_MIN_OVERHEAD; 4017 break; 4018 #endif 4019 default: 4020 break; 4021 } 4022 #if defined(INET) || defined(INET6) 4023 if (net->port) { 4024 net->mtu += (uint32_t)sizeof(struct udphdr); 4025 } 4026 #endif 4027 } else { 4028 switch (newaddr->sa_family) { 4029 #ifdef INET 4030 case AF_INET: 4031 net->mtu = SCTP_DEFAULT_MTU; 4032 break; 4033 #endif 4034 #ifdef INET6 4035 case AF_INET6: 4036 net->mtu = 1280; 4037 break; 4038 #endif 4039 default: 4040 break; 4041 } 4042 } 4043 } 4044 #if defined(INET) || defined(INET6) 4045 if (net->port) { 4046 net->mtu -= (uint32_t)sizeof(struct udphdr); 4047 } 4048 #endif 4049 if (from == SCTP_ALLOC_ASOC) { 4050 stcb->asoc.smallest_mtu = net->mtu; 4051 } 4052 if (stcb->asoc.smallest_mtu > net->mtu) { 4053 sctp_pathmtu_adjustment(stcb, net->mtu); 4054 } 4055 #ifdef INET6 4056 if (newaddr->sa_family == AF_INET6) { 4057 struct sockaddr_in6 *sin6; 4058 4059 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4060 (void)sa6_recoverscope(sin6); 4061 } 4062 #endif 4063 4064 /* JRS - Use the congestion control given in the CC module */ 4065 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4066 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4067 4068 /* 4069 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4070 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4071 */ 4072 net->find_pseudo_cumack = 1; 4073 net->find_rtx_pseudo_cumack = 1; 4074 /* Choose an initial flowid. */ 4075 net->flowid = stcb->asoc.my_vtag ^ 4076 ntohs(stcb->rport) ^ 4077 ntohs(stcb->sctp_ep->sctp_lport); 4078 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4079 if (netp) { 4080 *netp = net; 4081 } 4082 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4083 if (net->ro.ro_nh == NULL) { 4084 /* Since we have no route put it at the back */ 4085 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4086 } else if (netfirst == NULL) { 4087 /* We are the first one in the pool. */ 4088 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4089 } else if (netfirst->ro.ro_nh == NULL) { 4090 /* 4091 * First one has NO route. Place this one ahead of the first 4092 * one. 4093 */ 4094 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4095 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4096 /* 4097 * This one has a different interface than the one at the 4098 * top of the list. Place it ahead. 4099 */ 4100 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4101 } else { 4102 /* 4103 * Ok we have the same interface as the first one. Move 4104 * forward until we find either a) one with a NULL route... 4105 * insert ahead of that b) one with a different ifp.. insert 4106 * after that. c) end of the list.. insert at the tail. 4107 */ 4108 struct sctp_nets *netlook; 4109 4110 do { 4111 netlook = TAILQ_NEXT(netfirst, sctp_next); 4112 if (netlook == NULL) { 4113 /* End of the list */ 4114 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4115 break; 4116 } else if (netlook->ro.ro_nh == NULL) { 4117 /* next one has NO route */ 4118 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4119 break; 4120 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4121 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4122 net, sctp_next); 4123 break; 4124 } 4125 /* Shift forward */ 4126 netfirst = netlook; 4127 } while (netlook != NULL); 4128 } 4129 4130 /* got to have a primary set */ 4131 if (stcb->asoc.primary_destination == 0) { 4132 stcb->asoc.primary_destination = net; 4133 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4134 (net->ro.ro_nh) && 4135 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4136 /* No route to current primary adopt new primary */ 4137 stcb->asoc.primary_destination = net; 4138 } 4139 /* Validate primary is first */ 4140 net = TAILQ_FIRST(&stcb->asoc.nets); 4141 if ((net != stcb->asoc.primary_destination) && 4142 (stcb->asoc.primary_destination)) { 4143 /* 4144 * first one on the list is NOT the primary sctp_cmpaddr() 4145 * is much more efficient if the primary is the first on the 4146 * list, make it so. 4147 */ 4148 TAILQ_REMOVE(&stcb->asoc.nets, 4149 stcb->asoc.primary_destination, sctp_next); 4150 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4151 stcb->asoc.primary_destination, sctp_next); 4152 } 4153 return (0); 4154 } 4155 4156 4157 static uint32_t 4158 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4159 { 4160 uint32_t id; 4161 struct sctpasochead *head; 4162 struct sctp_tcb *lstcb; 4163 4164 try_again: 4165 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4166 /* TSNH */ 4167 return (0); 4168 } 4169 /* 4170 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4171 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4172 */ 4173 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4174 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4175 } 4176 id = inp->sctp_associd_counter; 4177 inp->sctp_associd_counter++; 4178 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4179 if (lstcb) { 4180 goto try_again; 4181 } 4182 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4183 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4184 stcb->asoc.in_asocid_hash = 1; 4185 return (id); 4186 } 4187 4188 /* 4189 * allocate an association and add it to the endpoint. The caller must be 4190 * careful to add all additional addresses once they are know right away or 4191 * else the assoc will be may experience a blackout scenario. 4192 */ 4193 struct sctp_tcb * 4194 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4195 int *error, uint32_t override_tag, uint32_t vrf_id, 4196 uint16_t o_streams, uint16_t port, 4197 struct thread *p, 4198 int initialize_auth_params) 4199 { 4200 /* note the p argument is only valid in unbound sockets */ 4201 4202 struct sctp_tcb *stcb; 4203 struct sctp_association *asoc; 4204 struct sctpasochead *head; 4205 uint16_t rport; 4206 int err; 4207 4208 /* 4209 * Assumption made here: Caller has done a 4210 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4211 * address does not exist already. 4212 */ 4213 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4214 /* Hit max assoc, sorry no more */ 4215 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4216 *error = ENOBUFS; 4217 return (NULL); 4218 } 4219 if (firstaddr == NULL) { 4220 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4221 *error = EINVAL; 4222 return (NULL); 4223 } 4224 SCTP_INP_RLOCK(inp); 4225 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4226 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4227 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4228 /* 4229 * If its in the TCP pool, its NOT allowed to create an 4230 * association. The parent listener needs to call 4231 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4232 * off, or connected one does this.. its an error. 4233 */ 4234 SCTP_INP_RUNLOCK(inp); 4235 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4236 *error = EINVAL; 4237 return (NULL); 4238 } 4239 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4240 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4241 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4242 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4243 SCTP_INP_RUNLOCK(inp); 4244 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4245 *error = EINVAL; 4246 return (NULL); 4247 } 4248 } 4249 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4250 #ifdef SCTP_DEBUG 4251 if (firstaddr) { 4252 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4253 switch (firstaddr->sa_family) { 4254 #ifdef INET 4255 case AF_INET: 4256 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4257 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4258 break; 4259 #endif 4260 #ifdef INET6 4261 case AF_INET6: 4262 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4263 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4264 break; 4265 #endif 4266 default: 4267 break; 4268 } 4269 } else { 4270 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4271 } 4272 #endif /* SCTP_DEBUG */ 4273 switch (firstaddr->sa_family) { 4274 #ifdef INET 4275 case AF_INET: 4276 { 4277 struct sockaddr_in *sin; 4278 4279 sin = (struct sockaddr_in *)firstaddr; 4280 if ((ntohs(sin->sin_port) == 0) || 4281 (sin->sin_addr.s_addr == INADDR_ANY) || 4282 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4283 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4284 /* Invalid address */ 4285 SCTP_INP_RUNLOCK(inp); 4286 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4287 *error = EINVAL; 4288 return (NULL); 4289 } 4290 rport = sin->sin_port; 4291 break; 4292 } 4293 #endif 4294 #ifdef INET6 4295 case AF_INET6: 4296 { 4297 struct sockaddr_in6 *sin6; 4298 4299 sin6 = (struct sockaddr_in6 *)firstaddr; 4300 if ((ntohs(sin6->sin6_port) == 0) || 4301 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4302 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4303 /* Invalid address */ 4304 SCTP_INP_RUNLOCK(inp); 4305 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4306 *error = EINVAL; 4307 return (NULL); 4308 } 4309 rport = sin6->sin6_port; 4310 break; 4311 } 4312 #endif 4313 default: 4314 /* not supported family type */ 4315 SCTP_INP_RUNLOCK(inp); 4316 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4317 *error = EINVAL; 4318 return (NULL); 4319 } 4320 SCTP_INP_RUNLOCK(inp); 4321 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4322 /* 4323 * If you have not performed a bind, then we need to do the 4324 * ephemeral bind for you. 4325 */ 4326 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) { 4327 /* bind error, probably perm */ 4328 *error = err; 4329 return (NULL); 4330 } 4331 } 4332 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4333 if (stcb == NULL) { 4334 /* out of memory? */ 4335 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4336 *error = ENOMEM; 4337 return (NULL); 4338 } 4339 SCTP_INCR_ASOC_COUNT(); 4340 4341 memset(stcb, 0, sizeof(*stcb)); 4342 asoc = &stcb->asoc; 4343 4344 SCTP_TCB_LOCK_INIT(stcb); 4345 SCTP_TCB_SEND_LOCK_INIT(stcb); 4346 stcb->rport = rport; 4347 /* setup back pointer's */ 4348 stcb->sctp_ep = inp; 4349 stcb->sctp_socket = inp->sctp_socket; 4350 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4351 /* failed */ 4352 SCTP_TCB_LOCK_DESTROY(stcb); 4353 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4354 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4355 SCTP_DECR_ASOC_COUNT(); 4356 *error = err; 4357 return (NULL); 4358 } 4359 /* and the port */ 4360 SCTP_INP_INFO_WLOCK(); 4361 SCTP_INP_WLOCK(inp); 4362 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4363 /* inpcb freed while alloc going on */ 4364 SCTP_TCB_LOCK_DESTROY(stcb); 4365 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4366 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4367 SCTP_INP_WUNLOCK(inp); 4368 SCTP_INP_INFO_WUNLOCK(); 4369 SCTP_DECR_ASOC_COUNT(); 4370 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4371 *error = EINVAL; 4372 return (NULL); 4373 } 4374 SCTP_TCB_LOCK(stcb); 4375 4376 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4377 /* now that my_vtag is set, add it to the hash */ 4378 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4379 /* put it in the bucket in the vtag hash of assoc's for the system */ 4380 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4381 SCTP_INP_INFO_WUNLOCK(); 4382 4383 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4384 /* failure.. memory error? */ 4385 if (asoc->strmout) { 4386 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4387 asoc->strmout = NULL; 4388 } 4389 if (asoc->mapping_array) { 4390 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4391 asoc->mapping_array = NULL; 4392 } 4393 if (asoc->nr_mapping_array) { 4394 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4395 asoc->nr_mapping_array = NULL; 4396 } 4397 SCTP_DECR_ASOC_COUNT(); 4398 SCTP_TCB_UNLOCK(stcb); 4399 SCTP_TCB_LOCK_DESTROY(stcb); 4400 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4401 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4402 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4403 SCTP_INP_WUNLOCK(inp); 4404 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4405 *error = ENOBUFS; 4406 return (NULL); 4407 } 4408 /* Init all the timers */ 4409 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4410 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4411 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4412 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4413 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4414 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4415 4416 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4417 /* now file the port under the hash as well */ 4418 if (inp->sctp_tcbhash != NULL) { 4419 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4420 inp->sctp_hashmark)]; 4421 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4422 } 4423 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4424 sctp_initialize_auth_params(inp, stcb); 4425 } 4426 SCTP_INP_WUNLOCK(inp); 4427 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4428 return (stcb); 4429 } 4430 4431 4432 void 4433 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4434 { 4435 struct sctp_inpcb *inp; 4436 struct sctp_association *asoc; 4437 4438 inp = stcb->sctp_ep; 4439 asoc = &stcb->asoc; 4440 asoc->numnets--; 4441 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4442 if (net == asoc->primary_destination) { 4443 /* Reset primary */ 4444 struct sctp_nets *lnet; 4445 4446 lnet = TAILQ_FIRST(&asoc->nets); 4447 /* 4448 * Mobility adaptation Ideally, if deleted destination is 4449 * the primary, it becomes a fast retransmission trigger by 4450 * the subsequent SET PRIMARY. (by micchie) 4451 */ 4452 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4453 SCTP_MOBILITY_BASE) || 4454 sctp_is_mobility_feature_on(stcb->sctp_ep, 4455 SCTP_MOBILITY_FASTHANDOFF)) { 4456 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4457 if (asoc->deleted_primary != NULL) { 4458 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4459 goto out; 4460 } 4461 asoc->deleted_primary = net; 4462 atomic_add_int(&net->ref_count, 1); 4463 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4464 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4465 sctp_mobility_feature_on(stcb->sctp_ep, 4466 SCTP_MOBILITY_PRIM_DELETED); 4467 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4468 stcb->sctp_ep, stcb, NULL); 4469 } 4470 out: 4471 /* Try to find a confirmed primary */ 4472 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4473 } 4474 if (net == asoc->last_data_chunk_from) { 4475 /* Reset primary */ 4476 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4477 } 4478 if (net == asoc->last_control_chunk_from) { 4479 /* Clear net */ 4480 asoc->last_control_chunk_from = NULL; 4481 } 4482 if (net == stcb->asoc.alternate) { 4483 sctp_free_remote_addr(stcb->asoc.alternate); 4484 stcb->asoc.alternate = NULL; 4485 } 4486 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4487 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4488 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4489 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4490 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4491 sctp_free_remote_addr(net); 4492 } 4493 4494 /* 4495 * remove a remote endpoint address from an association, it will fail if the 4496 * address does not exist. 4497 */ 4498 int 4499 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4500 { 4501 /* 4502 * Here we need to remove a remote address. This is quite simple, we 4503 * first find it in the list of address for the association 4504 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4505 * on that item. Note we do not allow it to be removed if there are 4506 * no other addresses. 4507 */ 4508 struct sctp_association *asoc; 4509 struct sctp_nets *net, *nnet; 4510 4511 asoc = &stcb->asoc; 4512 4513 /* locate the address */ 4514 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4515 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4516 continue; 4517 } 4518 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4519 remaddr)) { 4520 /* we found the guy */ 4521 if (asoc->numnets < 2) { 4522 /* Must have at LEAST two remote addresses */ 4523 return (-1); 4524 } else { 4525 sctp_remove_net(stcb, net); 4526 return (0); 4527 } 4528 } 4529 } 4530 /* not found. */ 4531 return (-2); 4532 } 4533 4534 void 4535 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4536 { 4537 struct sctpvtaghead *chain; 4538 struct sctp_tagblock *twait_block; 4539 int found = 0; 4540 int i; 4541 4542 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4543 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4544 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4545 if ((twait_block->vtag_block[i].v_tag == tag) && 4546 (twait_block->vtag_block[i].lport == lport) && 4547 (twait_block->vtag_block[i].rport == rport)) { 4548 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4549 twait_block->vtag_block[i].v_tag = 0; 4550 twait_block->vtag_block[i].lport = 0; 4551 twait_block->vtag_block[i].rport = 0; 4552 found = 1; 4553 break; 4554 } 4555 } 4556 if (found) 4557 break; 4558 } 4559 } 4560 4561 int 4562 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4563 { 4564 struct sctpvtaghead *chain; 4565 struct sctp_tagblock *twait_block; 4566 int found = 0; 4567 int i; 4568 4569 SCTP_INP_INFO_WLOCK(); 4570 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4571 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4572 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4573 if ((twait_block->vtag_block[i].v_tag == tag) && 4574 (twait_block->vtag_block[i].lport == lport) && 4575 (twait_block->vtag_block[i].rport == rport)) { 4576 found = 1; 4577 break; 4578 } 4579 } 4580 if (found) 4581 break; 4582 } 4583 SCTP_INP_INFO_WUNLOCK(); 4584 return (found); 4585 } 4586 4587 4588 void 4589 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4590 { 4591 struct sctpvtaghead *chain; 4592 struct sctp_tagblock *twait_block; 4593 struct timeval now; 4594 int set, i; 4595 4596 if (time == 0) { 4597 /* Its disabled */ 4598 return; 4599 } 4600 (void)SCTP_GETTIME_TIMEVAL(&now); 4601 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4602 set = 0; 4603 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4604 /* Block(s) present, lets find space, and expire on the fly */ 4605 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4606 if ((twait_block->vtag_block[i].v_tag == 0) && 4607 !set) { 4608 twait_block->vtag_block[i].tv_sec_at_expire = 4609 now.tv_sec + time; 4610 twait_block->vtag_block[i].v_tag = tag; 4611 twait_block->vtag_block[i].lport = lport; 4612 twait_block->vtag_block[i].rport = rport; 4613 set = 1; 4614 } else if ((twait_block->vtag_block[i].v_tag) && 4615 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4616 /* Audit expires this guy */ 4617 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4618 twait_block->vtag_block[i].v_tag = 0; 4619 twait_block->vtag_block[i].lport = 0; 4620 twait_block->vtag_block[i].rport = 0; 4621 if (set == 0) { 4622 /* Reuse it for my new tag */ 4623 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4624 twait_block->vtag_block[i].v_tag = tag; 4625 twait_block->vtag_block[i].lport = lport; 4626 twait_block->vtag_block[i].rport = rport; 4627 set = 1; 4628 } 4629 } 4630 } 4631 if (set) { 4632 /* 4633 * We only do up to the block where we can place our 4634 * tag for audits 4635 */ 4636 break; 4637 } 4638 } 4639 /* Need to add a new block to chain */ 4640 if (!set) { 4641 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4642 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4643 if (twait_block == NULL) { 4644 return; 4645 } 4646 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4647 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4648 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4649 twait_block->vtag_block[0].v_tag = tag; 4650 twait_block->vtag_block[0].lport = lport; 4651 twait_block->vtag_block[0].rport = rport; 4652 } 4653 } 4654 4655 void 4656 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4657 { 4658 struct sctp_tmit_chunk *chk, *nchk; 4659 struct sctp_queued_to_read *control, *ncontrol; 4660 4661 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4662 TAILQ_REMOVE(rh, control, next_instrm); 4663 control->on_strm_q = 0; 4664 if (control->on_read_q == 0) { 4665 sctp_free_remote_addr(control->whoFrom); 4666 if (control->data) { 4667 sctp_m_freem(control->data); 4668 control->data = NULL; 4669 } 4670 } 4671 /* Reassembly free? */ 4672 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4673 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4674 if (chk->data) { 4675 sctp_m_freem(chk->data); 4676 chk->data = NULL; 4677 } 4678 if (chk->holds_key_ref) 4679 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4680 sctp_free_remote_addr(chk->whoTo); 4681 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4682 SCTP_DECR_CHK_COUNT(); 4683 /* sa_ignore FREED_MEMORY */ 4684 } 4685 /* 4686 * We don't free the address here since all the net's were 4687 * freed above. 4688 */ 4689 if (control->on_read_q == 0) { 4690 sctp_free_a_readq(stcb, control); 4691 } 4692 } 4693 } 4694 4695 /*- 4696 * Free the association after un-hashing the remote port. This 4697 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4698 * expect that the input to this function IS a locked TCB. 4699 * It will return 0, if it did NOT destroy the association (instead 4700 * it unlocks it. It will return NON-zero if it either destroyed the 4701 * association OR the association is already destroyed. 4702 */ 4703 int 4704 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4705 { 4706 int i; 4707 struct sctp_association *asoc; 4708 struct sctp_nets *net, *nnet; 4709 struct sctp_laddr *laddr, *naddr; 4710 struct sctp_tmit_chunk *chk, *nchk; 4711 struct sctp_asconf_addr *aparam, *naparam; 4712 struct sctp_asconf_ack *aack, *naack; 4713 struct sctp_stream_reset_list *strrst, *nstrrst; 4714 struct sctp_queued_to_read *sq, *nsq; 4715 struct sctp_stream_queue_pending *sp, *nsp; 4716 sctp_sharedkey_t *shared_key, *nshared_key; 4717 struct socket *so; 4718 4719 /* first, lets purge the entry from the hash table. */ 4720 4721 #ifdef SCTP_LOG_CLOSING 4722 sctp_log_closing(inp, stcb, 6); 4723 #endif 4724 if (stcb->asoc.state == 0) { 4725 #ifdef SCTP_LOG_CLOSING 4726 sctp_log_closing(inp, NULL, 7); 4727 #endif 4728 /* there is no asoc, really TSNH :-0 */ 4729 return (1); 4730 } 4731 if (stcb->asoc.alternate) { 4732 sctp_free_remote_addr(stcb->asoc.alternate); 4733 stcb->asoc.alternate = NULL; 4734 } 4735 /* TEMP CODE */ 4736 if (stcb->freed_from_where == 0) { 4737 /* Only record the first place free happened from */ 4738 stcb->freed_from_where = from_location; 4739 } 4740 /* TEMP CODE */ 4741 4742 asoc = &stcb->asoc; 4743 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4744 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4745 /* nothing around */ 4746 so = NULL; 4747 else 4748 so = inp->sctp_socket; 4749 4750 /* 4751 * We used timer based freeing if a reader or writer is in the way. 4752 * So we first check if we are actually being called from a timer, 4753 * if so we abort early if a reader or writer is still in the way. 4754 */ 4755 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4756 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4757 /* 4758 * is it the timer driving us? if so are the reader/writers 4759 * gone? 4760 */ 4761 if (stcb->asoc.refcnt) { 4762 /* nope, reader or writer in the way */ 4763 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4764 /* no asoc destroyed */ 4765 SCTP_TCB_UNLOCK(stcb); 4766 #ifdef SCTP_LOG_CLOSING 4767 sctp_log_closing(inp, stcb, 8); 4768 #endif 4769 return (0); 4770 } 4771 } 4772 /* Now clean up any other timers */ 4773 sctp_stop_association_timers(stcb, false); 4774 /* Now the read queue needs to be cleaned up (only once) */ 4775 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4776 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4777 SCTP_INP_READ_LOCK(inp); 4778 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4779 if (sq->stcb == stcb) { 4780 sq->do_not_ref_stcb = 1; 4781 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4782 /* 4783 * If there is no end, there never will be 4784 * now. 4785 */ 4786 if (sq->end_added == 0) { 4787 /* Held for PD-API clear that. */ 4788 sq->pdapi_aborted = 1; 4789 sq->held_length = 0; 4790 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4791 /* 4792 * Need to add a PD-API 4793 * aborted indication. 4794 * Setting the control_pdapi 4795 * assures that it will be 4796 * added right after this 4797 * msg. 4798 */ 4799 uint32_t strseq; 4800 4801 stcb->asoc.control_pdapi = sq; 4802 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4803 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4804 stcb, 4805 SCTP_PARTIAL_DELIVERY_ABORTED, 4806 (void *)&strseq, 4807 SCTP_SO_LOCKED); 4808 stcb->asoc.control_pdapi = NULL; 4809 } 4810 } 4811 /* Add an end to wake them */ 4812 sq->end_added = 1; 4813 } 4814 } 4815 SCTP_INP_READ_UNLOCK(inp); 4816 if (stcb->block_entry) { 4817 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4818 stcb->block_entry->error = ECONNRESET; 4819 stcb->block_entry = NULL; 4820 } 4821 } 4822 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4823 /* 4824 * Someone holds a reference OR the socket is unaccepted 4825 * yet. 4826 */ 4827 if ((stcb->asoc.refcnt) || 4828 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4829 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4830 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4831 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4832 } 4833 SCTP_TCB_UNLOCK(stcb); 4834 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4835 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4836 /* nothing around */ 4837 so = NULL; 4838 if (so) { 4839 /* Wake any reader/writers */ 4840 sctp_sorwakeup(inp, so); 4841 sctp_sowwakeup(inp, so); 4842 } 4843 4844 #ifdef SCTP_LOG_CLOSING 4845 sctp_log_closing(inp, stcb, 9); 4846 #endif 4847 /* no asoc destroyed */ 4848 return (0); 4849 } 4850 #ifdef SCTP_LOG_CLOSING 4851 sctp_log_closing(inp, stcb, 10); 4852 #endif 4853 /* 4854 * When I reach here, no others want to kill the assoc yet.. and I 4855 * own the lock. Now its possible an abort comes in when I do the 4856 * lock exchange below to grab all the locks to do the final take 4857 * out. to prevent this we increment the count, which will start a 4858 * timer and blow out above thus assuring us that we hold exclusive 4859 * killing of the asoc. Note that after getting back the TCB lock we 4860 * will go ahead and increment the counter back up and stop any 4861 * timer a passing stranger may have started :-S 4862 */ 4863 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4864 atomic_add_int(&stcb->asoc.refcnt, 1); 4865 4866 SCTP_TCB_UNLOCK(stcb); 4867 SCTP_INP_INFO_WLOCK(); 4868 SCTP_INP_WLOCK(inp); 4869 SCTP_TCB_LOCK(stcb); 4870 } 4871 /* Double check the GONE flag */ 4872 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4873 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4874 /* nothing around */ 4875 so = NULL; 4876 4877 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4878 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4879 /* 4880 * For TCP type we need special handling when we are 4881 * connected. We also include the peel'ed off ones to. 4882 */ 4883 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4884 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4885 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4886 if (so) { 4887 SOCKBUF_LOCK(&so->so_rcv); 4888 so->so_state &= ~(SS_ISCONNECTING | 4889 SS_ISDISCONNECTING | 4890 SS_ISCONFIRMING | 4891 SS_ISCONNECTED); 4892 so->so_state |= SS_ISDISCONNECTED; 4893 socantrcvmore_locked(so); 4894 socantsendmore(so); 4895 sctp_sowwakeup(inp, so); 4896 sctp_sorwakeup(inp, so); 4897 SCTP_SOWAKEUP(so); 4898 } 4899 } 4900 } 4901 4902 /* 4903 * Make it invalid too, that way if its about to run it will abort 4904 * and return. 4905 */ 4906 /* re-increment the lock */ 4907 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4908 atomic_add_int(&stcb->asoc.refcnt, -1); 4909 } 4910 if (stcb->asoc.refcnt) { 4911 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4912 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4913 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4914 SCTP_INP_INFO_WUNLOCK(); 4915 SCTP_INP_WUNLOCK(inp); 4916 } 4917 SCTP_TCB_UNLOCK(stcb); 4918 return (0); 4919 } 4920 asoc->state = 0; 4921 if (inp->sctp_tcbhash) { 4922 LIST_REMOVE(stcb, sctp_tcbhash); 4923 } 4924 if (stcb->asoc.in_asocid_hash) { 4925 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4926 } 4927 /* Now lets remove it from the list of ALL associations in the EP */ 4928 LIST_REMOVE(stcb, sctp_tcblist); 4929 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4930 SCTP_INP_INCR_REF(inp); 4931 SCTP_INP_WUNLOCK(inp); 4932 } 4933 /* pull from vtag hash */ 4934 LIST_REMOVE(stcb, sctp_asocs); 4935 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4936 inp->sctp_lport, stcb->rport); 4937 4938 /* 4939 * Now restop the timers to be sure this is paranoia at is finest! 4940 */ 4941 sctp_stop_association_timers(stcb, true); 4942 4943 /* 4944 * The chunk lists and such SHOULD be empty but we check them just 4945 * in case. 4946 */ 4947 /* anything on the wheel needs to be removed */ 4948 SCTP_TCB_SEND_LOCK(stcb); 4949 for (i = 0; i < asoc->streamoutcnt; i++) { 4950 struct sctp_stream_out *outs; 4951 4952 outs = &asoc->strmout[i]; 4953 /* now clean up any chunks here */ 4954 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4955 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4956 TAILQ_REMOVE(&outs->outqueue, sp, next); 4957 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1); 4958 sctp_free_spbufspace(stcb, asoc, sp); 4959 if (sp->data) { 4960 if (so) { 4961 /* Still an open socket - report */ 4962 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4963 0, (void *)sp, SCTP_SO_LOCKED); 4964 } 4965 if (sp->data) { 4966 sctp_m_freem(sp->data); 4967 sp->data = NULL; 4968 sp->tail_mbuf = NULL; 4969 sp->length = 0; 4970 } 4971 } 4972 if (sp->net) { 4973 sctp_free_remote_addr(sp->net); 4974 sp->net = NULL; 4975 } 4976 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4977 } 4978 } 4979 SCTP_TCB_SEND_UNLOCK(stcb); 4980 /* sa_ignore FREED_MEMORY */ 4981 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4982 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4983 SCTP_FREE(strrst, SCTP_M_STRESET); 4984 } 4985 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4986 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4987 if (sq->data) { 4988 sctp_m_freem(sq->data); 4989 sq->data = NULL; 4990 } 4991 sctp_free_remote_addr(sq->whoFrom); 4992 sq->whoFrom = NULL; 4993 sq->stcb = NULL; 4994 /* Free the ctl entry */ 4995 sctp_free_a_readq(stcb, sq); 4996 /* sa_ignore FREED_MEMORY */ 4997 } 4998 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4999 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5000 if (chk->data) { 5001 sctp_m_freem(chk->data); 5002 chk->data = NULL; 5003 } 5004 if (chk->holds_key_ref) 5005 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5006 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5007 SCTP_DECR_CHK_COUNT(); 5008 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5009 asoc->free_chunk_cnt--; 5010 /* sa_ignore FREED_MEMORY */ 5011 } 5012 /* pending send queue SHOULD be empty */ 5013 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5014 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5015 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5016 #ifdef INVARIANTS 5017 } else { 5018 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5019 #endif 5020 } 5021 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5022 if (chk->data) { 5023 if (so) { 5024 /* Still a socket? */ 5025 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5026 0, chk, SCTP_SO_LOCKED); 5027 } 5028 if (chk->data) { 5029 sctp_m_freem(chk->data); 5030 chk->data = NULL; 5031 } 5032 } 5033 if (chk->holds_key_ref) 5034 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5035 if (chk->whoTo) { 5036 sctp_free_remote_addr(chk->whoTo); 5037 chk->whoTo = NULL; 5038 } 5039 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5040 SCTP_DECR_CHK_COUNT(); 5041 /* sa_ignore FREED_MEMORY */ 5042 } 5043 /* sent queue SHOULD be empty */ 5044 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5045 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5046 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5047 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5048 #ifdef INVARIANTS 5049 } else { 5050 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5051 #endif 5052 } 5053 } 5054 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5055 if (chk->data) { 5056 if (so) { 5057 /* Still a socket? */ 5058 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5059 0, chk, SCTP_SO_LOCKED); 5060 } 5061 if (chk->data) { 5062 sctp_m_freem(chk->data); 5063 chk->data = NULL; 5064 } 5065 } 5066 if (chk->holds_key_ref) 5067 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5068 sctp_free_remote_addr(chk->whoTo); 5069 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5070 SCTP_DECR_CHK_COUNT(); 5071 /* sa_ignore FREED_MEMORY */ 5072 } 5073 #ifdef INVARIANTS 5074 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5075 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5076 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5077 } 5078 } 5079 #endif 5080 /* control queue MAY not be empty */ 5081 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5082 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5083 if (chk->data) { 5084 sctp_m_freem(chk->data); 5085 chk->data = NULL; 5086 } 5087 if (chk->holds_key_ref) 5088 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5089 sctp_free_remote_addr(chk->whoTo); 5090 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5091 SCTP_DECR_CHK_COUNT(); 5092 /* sa_ignore FREED_MEMORY */ 5093 } 5094 /* ASCONF queue MAY not be empty */ 5095 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5096 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5097 if (chk->data) { 5098 sctp_m_freem(chk->data); 5099 chk->data = NULL; 5100 } 5101 if (chk->holds_key_ref) 5102 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5103 sctp_free_remote_addr(chk->whoTo); 5104 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5105 SCTP_DECR_CHK_COUNT(); 5106 /* sa_ignore FREED_MEMORY */ 5107 } 5108 if (asoc->mapping_array) { 5109 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5110 asoc->mapping_array = NULL; 5111 } 5112 if (asoc->nr_mapping_array) { 5113 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5114 asoc->nr_mapping_array = NULL; 5115 } 5116 /* the stream outs */ 5117 if (asoc->strmout) { 5118 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5119 asoc->strmout = NULL; 5120 } 5121 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5122 if (asoc->strmin) { 5123 for (i = 0; i < asoc->streamincnt; i++) { 5124 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5125 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5126 } 5127 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5128 asoc->strmin = NULL; 5129 } 5130 asoc->streamincnt = 0; 5131 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5132 #ifdef INVARIANTS 5133 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5134 panic("no net's left alloc'ed, or list points to itself"); 5135 } 5136 #endif 5137 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5138 sctp_free_remote_addr(net); 5139 } 5140 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5141 /* sa_ignore FREED_MEMORY */ 5142 sctp_remove_laddr(laddr); 5143 } 5144 5145 /* pending asconf (address) parameters */ 5146 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5147 /* sa_ignore FREED_MEMORY */ 5148 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5149 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5150 } 5151 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5152 /* sa_ignore FREED_MEMORY */ 5153 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5154 if (aack->data != NULL) { 5155 sctp_m_freem(aack->data); 5156 } 5157 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5158 } 5159 /* clean up auth stuff */ 5160 if (asoc->local_hmacs) 5161 sctp_free_hmaclist(asoc->local_hmacs); 5162 if (asoc->peer_hmacs) 5163 sctp_free_hmaclist(asoc->peer_hmacs); 5164 5165 if (asoc->local_auth_chunks) 5166 sctp_free_chunklist(asoc->local_auth_chunks); 5167 if (asoc->peer_auth_chunks) 5168 sctp_free_chunklist(asoc->peer_auth_chunks); 5169 5170 sctp_free_authinfo(&asoc->authinfo); 5171 5172 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5173 LIST_REMOVE(shared_key, next); 5174 sctp_free_sharedkey(shared_key); 5175 /* sa_ignore FREED_MEMORY */ 5176 } 5177 5178 /* Insert new items here :> */ 5179 5180 /* Get rid of LOCK */ 5181 SCTP_TCB_UNLOCK(stcb); 5182 SCTP_TCB_LOCK_DESTROY(stcb); 5183 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5184 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5185 SCTP_INP_INFO_WUNLOCK(); 5186 SCTP_INP_RLOCK(inp); 5187 } 5188 #ifdef SCTP_TRACK_FREED_ASOCS 5189 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5190 /* now clean up the tasoc itself */ 5191 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5192 SCTP_DECR_ASOC_COUNT(); 5193 } else { 5194 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5195 } 5196 #else 5197 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5198 SCTP_DECR_ASOC_COUNT(); 5199 #endif 5200 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5201 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5202 /* 5203 * If its NOT the inp_free calling us AND sctp_close 5204 * as been called, we call back... 5205 */ 5206 SCTP_INP_RUNLOCK(inp); 5207 /* 5208 * This will start the kill timer (if we are the 5209 * last one) since we hold an increment yet. But 5210 * this is the only safe way to do this since 5211 * otherwise if the socket closes at the same time 5212 * we are here we might collide in the cleanup. 5213 */ 5214 sctp_inpcb_free(inp, 5215 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5216 SCTP_CALLED_DIRECTLY_NOCMPSET); 5217 SCTP_INP_DECR_REF(inp); 5218 } else { 5219 /* The socket is still open. */ 5220 SCTP_INP_DECR_REF(inp); 5221 SCTP_INP_RUNLOCK(inp); 5222 } 5223 } 5224 /* destroyed the asoc */ 5225 #ifdef SCTP_LOG_CLOSING 5226 sctp_log_closing(inp, NULL, 11); 5227 #endif 5228 return (1); 5229 } 5230 5231 5232 5233 /* 5234 * determine if a destination is "reachable" based upon the addresses bound 5235 * to the current endpoint (e.g. only v4 or v6 currently bound) 5236 */ 5237 /* 5238 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5239 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5240 * types bound as its endpoint 5241 */ 5242 int 5243 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5244 { 5245 struct sctp_inpcb *inp; 5246 int answer; 5247 5248 /* 5249 * No locks here, the TCB, in all cases is already locked and an 5250 * assoc is up. There is either a INP lock by the caller applied (in 5251 * asconf case when deleting an address) or NOT in the HB case, 5252 * however if HB then the INP increment is up and the INP will not 5253 * be removed (on top of the fact that we have a TCB lock). So we 5254 * only want to read the sctp_flags, which is either bound-all or 5255 * not.. no protection needed since once an assoc is up you can't be 5256 * changing your binding. 5257 */ 5258 inp = stcb->sctp_ep; 5259 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5260 /* if bound all, destination is not restricted */ 5261 /* 5262 * RRS: Question during lock work: Is this correct? If you 5263 * are bound-all you still might need to obey the V4--V6 5264 * flags??? IMO this bound-all stuff needs to be removed! 5265 */ 5266 return (1); 5267 } 5268 /* NOTE: all "scope" checks are done when local addresses are added */ 5269 switch (destaddr->sa_family) { 5270 #ifdef INET6 5271 case AF_INET6: 5272 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5273 break; 5274 #endif 5275 #ifdef INET 5276 case AF_INET: 5277 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5278 break; 5279 #endif 5280 default: 5281 /* invalid family, so it's unreachable */ 5282 answer = 0; 5283 break; 5284 } 5285 return (answer); 5286 } 5287 5288 /* 5289 * update the inp_vflags on an endpoint 5290 */ 5291 static void 5292 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5293 { 5294 struct sctp_laddr *laddr; 5295 5296 /* first clear the flag */ 5297 inp->ip_inp.inp.inp_vflag = 0; 5298 /* set the flag based on addresses on the ep list */ 5299 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5300 if (laddr->ifa == NULL) { 5301 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5302 __func__); 5303 continue; 5304 } 5305 5306 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5307 continue; 5308 } 5309 switch (laddr->ifa->address.sa.sa_family) { 5310 #ifdef INET6 5311 case AF_INET6: 5312 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5313 break; 5314 #endif 5315 #ifdef INET 5316 case AF_INET: 5317 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5318 break; 5319 #endif 5320 default: 5321 break; 5322 } 5323 } 5324 } 5325 5326 /* 5327 * Add the address to the endpoint local address list There is nothing to be 5328 * done if we are bound to all addresses 5329 */ 5330 void 5331 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5332 { 5333 struct sctp_laddr *laddr; 5334 struct sctp_tcb *stcb; 5335 int fnd, error = 0; 5336 5337 fnd = 0; 5338 5339 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5340 /* You are already bound to all. You have it already */ 5341 return; 5342 } 5343 #ifdef INET6 5344 if (ifa->address.sa.sa_family == AF_INET6) { 5345 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5346 /* Can't bind a non-useable addr. */ 5347 return; 5348 } 5349 } 5350 #endif 5351 /* first, is it already present? */ 5352 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5353 if (laddr->ifa == ifa) { 5354 fnd = 1; 5355 break; 5356 } 5357 } 5358 5359 if (fnd == 0) { 5360 /* Not in the ep list */ 5361 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5362 if (error != 0) 5363 return; 5364 inp->laddr_count++; 5365 /* update inp_vflag flags */ 5366 switch (ifa->address.sa.sa_family) { 5367 #ifdef INET6 5368 case AF_INET6: 5369 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5370 break; 5371 #endif 5372 #ifdef INET 5373 case AF_INET: 5374 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5375 break; 5376 #endif 5377 default: 5378 break; 5379 } 5380 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5381 sctp_add_local_addr_restricted(stcb, ifa); 5382 } 5383 } 5384 return; 5385 } 5386 5387 5388 /* 5389 * select a new (hopefully reachable) destination net (should only be used 5390 * when we deleted an ep addr that is the only usable source address to reach 5391 * the destination net) 5392 */ 5393 static void 5394 sctp_select_primary_destination(struct sctp_tcb *stcb) 5395 { 5396 struct sctp_nets *net; 5397 5398 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5399 /* for now, we'll just pick the first reachable one we find */ 5400 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5401 continue; 5402 if (sctp_destination_is_reachable(stcb, 5403 (struct sockaddr *)&net->ro._l_addr)) { 5404 /* found a reachable destination */ 5405 stcb->asoc.primary_destination = net; 5406 } 5407 } 5408 /* I can't there from here! ...we're gonna die shortly... */ 5409 } 5410 5411 5412 /* 5413 * Delete the address from the endpoint local address list. There is nothing 5414 * to be done if we are bound to all addresses 5415 */ 5416 void 5417 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5418 { 5419 struct sctp_laddr *laddr; 5420 int fnd; 5421 5422 fnd = 0; 5423 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5424 /* You are already bound to all. You have it already */ 5425 return; 5426 } 5427 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5428 if (laddr->ifa == ifa) { 5429 fnd = 1; 5430 break; 5431 } 5432 } 5433 if (fnd && (inp->laddr_count < 2)) { 5434 /* can't delete unless there are at LEAST 2 addresses */ 5435 return; 5436 } 5437 if (fnd) { 5438 /* 5439 * clean up any use of this address go through our 5440 * associations and clear any last_used_address that match 5441 * this one for each assoc, see if a new primary_destination 5442 * is needed 5443 */ 5444 struct sctp_tcb *stcb; 5445 5446 /* clean up "next_addr_touse" */ 5447 if (inp->next_addr_touse == laddr) 5448 /* delete this address */ 5449 inp->next_addr_touse = NULL; 5450 5451 /* clean up "last_used_address" */ 5452 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5453 struct sctp_nets *net; 5454 5455 SCTP_TCB_LOCK(stcb); 5456 if (stcb->asoc.last_used_address == laddr) 5457 /* delete this address */ 5458 stcb->asoc.last_used_address = NULL; 5459 /* 5460 * Now spin through all the nets and purge any ref 5461 * to laddr 5462 */ 5463 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5464 if (net->ro._s_addr == laddr->ifa) { 5465 /* Yep, purge src address selected */ 5466 RO_NHFREE(&net->ro); 5467 sctp_free_ifa(net->ro._s_addr); 5468 net->ro._s_addr = NULL; 5469 net->src_addr_selected = 0; 5470 } 5471 } 5472 SCTP_TCB_UNLOCK(stcb); 5473 } /* for each tcb */ 5474 /* remove it from the ep list */ 5475 sctp_remove_laddr(laddr); 5476 inp->laddr_count--; 5477 /* update inp_vflag flags */ 5478 sctp_update_ep_vflag(inp); 5479 } 5480 return; 5481 } 5482 5483 /* 5484 * Add the address to the TCB local address restricted list. 5485 * This is a "pending" address list (eg. addresses waiting for an 5486 * ASCONF-ACK response) and cannot be used as a valid source address. 5487 */ 5488 void 5489 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5490 { 5491 struct sctp_laddr *laddr; 5492 struct sctpladdr *list; 5493 5494 /* 5495 * Assumes TCB is locked.. and possibly the INP. May need to 5496 * confirm/fix that if we need it and is not the case. 5497 */ 5498 list = &stcb->asoc.sctp_restricted_addrs; 5499 5500 #ifdef INET6 5501 if (ifa->address.sa.sa_family == AF_INET6) { 5502 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5503 /* Can't bind a non-existent addr. */ 5504 return; 5505 } 5506 } 5507 #endif 5508 /* does the address already exist? */ 5509 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5510 if (laddr->ifa == ifa) { 5511 return; 5512 } 5513 } 5514 5515 /* add to the list */ 5516 (void)sctp_insert_laddr(list, ifa, 0); 5517 return; 5518 } 5519 5520 /* 5521 * Remove a local address from the TCB local address restricted list 5522 */ 5523 void 5524 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5525 { 5526 struct sctp_inpcb *inp; 5527 struct sctp_laddr *laddr; 5528 5529 /* 5530 * This is called by asconf work. It is assumed that a) The TCB is 5531 * locked and b) The INP is locked. This is true in as much as I can 5532 * trace through the entry asconf code where I did these locks. 5533 * Again, the ASCONF code is a bit different in that it does lock 5534 * the INP during its work often times. This must be since we don't 5535 * want other proc's looking up things while what they are looking 5536 * up is changing :-D 5537 */ 5538 5539 inp = stcb->sctp_ep; 5540 /* if subset bound and don't allow ASCONF's, can't delete last */ 5541 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5542 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5543 if (stcb->sctp_ep->laddr_count < 2) { 5544 /* can't delete last address */ 5545 return; 5546 } 5547 } 5548 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5549 /* remove the address if it exists */ 5550 if (laddr->ifa == NULL) 5551 continue; 5552 if (laddr->ifa == ifa) { 5553 sctp_remove_laddr(laddr); 5554 return; 5555 } 5556 } 5557 5558 /* address not found! */ 5559 return; 5560 } 5561 5562 /* sysctl */ 5563 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5564 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5565 5566 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5567 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5568 int *sctp_cpuarry = NULL; 5569 5570 void 5571 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5572 { 5573 /* Queue a packet to a processor for the specified core */ 5574 struct sctp_mcore_queue *qent; 5575 struct sctp_mcore_ctrl *wkq; 5576 int need_wake = 0; 5577 5578 if (sctp_mcore_workers == NULL) { 5579 /* Something went way bad during setup */ 5580 sctp_input_with_port(m, off, 0); 5581 return; 5582 } 5583 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5584 (sizeof(struct sctp_mcore_queue)), 5585 SCTP_M_MCORE); 5586 if (qent == NULL) { 5587 /* This is trouble */ 5588 sctp_input_with_port(m, off, 0); 5589 return; 5590 } 5591 qent->vn = curvnet; 5592 qent->m = m; 5593 qent->off = off; 5594 qent->v6 = 0; 5595 wkq = &sctp_mcore_workers[cpu_to_use]; 5596 SCTP_MCORE_QLOCK(wkq); 5597 5598 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5599 if (wkq->running == 0) { 5600 need_wake = 1; 5601 } 5602 SCTP_MCORE_QUNLOCK(wkq); 5603 if (need_wake) { 5604 wakeup(&wkq->running); 5605 } 5606 } 5607 5608 static void 5609 sctp_mcore_thread(void *arg) 5610 { 5611 5612 struct sctp_mcore_ctrl *wkq; 5613 struct sctp_mcore_queue *qent; 5614 5615 wkq = (struct sctp_mcore_ctrl *)arg; 5616 struct mbuf *m; 5617 int off, v6; 5618 5619 /* Wait for first tickle */ 5620 SCTP_MCORE_LOCK(wkq); 5621 wkq->running = 0; 5622 msleep(&wkq->running, 5623 &wkq->core_mtx, 5624 0, "wait for pkt", 0); 5625 SCTP_MCORE_UNLOCK(wkq); 5626 5627 /* Bind to our cpu */ 5628 thread_lock(curthread); 5629 sched_bind(curthread, wkq->cpuid); 5630 thread_unlock(curthread); 5631 5632 /* Now lets start working */ 5633 SCTP_MCORE_LOCK(wkq); 5634 /* Now grab lock and go */ 5635 for (;;) { 5636 SCTP_MCORE_QLOCK(wkq); 5637 skip_sleep: 5638 wkq->running = 1; 5639 qent = TAILQ_FIRST(&wkq->que); 5640 if (qent) { 5641 TAILQ_REMOVE(&wkq->que, qent, next); 5642 SCTP_MCORE_QUNLOCK(wkq); 5643 CURVNET_SET(qent->vn); 5644 m = qent->m; 5645 off = qent->off; 5646 v6 = qent->v6; 5647 SCTP_FREE(qent, SCTP_M_MCORE); 5648 if (v6 == 0) { 5649 sctp_input_with_port(m, off, 0); 5650 } else { 5651 SCTP_PRINTF("V6 not yet supported\n"); 5652 sctp_m_freem(m); 5653 } 5654 CURVNET_RESTORE(); 5655 SCTP_MCORE_QLOCK(wkq); 5656 } 5657 wkq->running = 0; 5658 if (!TAILQ_EMPTY(&wkq->que)) { 5659 goto skip_sleep; 5660 } 5661 SCTP_MCORE_QUNLOCK(wkq); 5662 msleep(&wkq->running, 5663 &wkq->core_mtx, 5664 0, "wait for pkt", 0); 5665 } 5666 } 5667 5668 static void 5669 sctp_startup_mcore_threads(void) 5670 { 5671 int i, cpu; 5672 5673 if (mp_ncpus == 1) 5674 return; 5675 5676 if (sctp_mcore_workers != NULL) { 5677 /* 5678 * Already been here in some previous vnet? 5679 */ 5680 return; 5681 } 5682 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5683 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5684 SCTP_M_MCORE); 5685 if (sctp_mcore_workers == NULL) { 5686 /* TSNH I hope */ 5687 return; 5688 } 5689 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5690 sizeof(struct sctp_mcore_ctrl))); 5691 /* Init the structures */ 5692 for (i = 0; i <= mp_maxid; i++) { 5693 TAILQ_INIT(&sctp_mcore_workers[i].que); 5694 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5695 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5696 sctp_mcore_workers[i].cpuid = i; 5697 } 5698 if (sctp_cpuarry == NULL) { 5699 SCTP_MALLOC(sctp_cpuarry, int *, 5700 (mp_ncpus * sizeof(int)), 5701 SCTP_M_MCORE); 5702 i = 0; 5703 CPU_FOREACH(cpu) { 5704 sctp_cpuarry[i] = cpu; 5705 i++; 5706 } 5707 } 5708 /* Now start them all */ 5709 CPU_FOREACH(cpu) { 5710 (void)kproc_create(sctp_mcore_thread, 5711 (void *)&sctp_mcore_workers[cpu], 5712 &sctp_mcore_workers[cpu].thread_proc, 5713 RFPROC, 5714 SCTP_KTHREAD_PAGES, 5715 SCTP_MCORE_NAME); 5716 } 5717 } 5718 #endif 5719 5720 void 5721 sctp_pcb_init(void) 5722 { 5723 /* 5724 * SCTP initialization for the PCB structures should be called by 5725 * the sctp_init() function. 5726 */ 5727 int i; 5728 struct timeval tv; 5729 5730 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5731 /* error I was called twice */ 5732 return; 5733 } 5734 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5735 5736 #if defined(SCTP_LOCAL_TRACE_BUF) 5737 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5738 #endif 5739 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5740 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5741 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5742 SCTP_M_MCORE); 5743 #endif 5744 (void)SCTP_GETTIME_TIMEVAL(&tv); 5745 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5746 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5747 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5748 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5749 #else 5750 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5751 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5752 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5753 #endif 5754 /* init the empty list of (All) Endpoints */ 5755 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5756 5757 5758 /* init the hash table of endpoints */ 5759 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5760 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5761 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5762 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5763 &SCTP_BASE_INFO(hashasocmark)); 5764 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5765 &SCTP_BASE_INFO(hashmark)); 5766 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5767 &SCTP_BASE_INFO(hashtcpmark)); 5768 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5769 5770 5771 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5772 &SCTP_BASE_INFO(hashvrfmark)); 5773 5774 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5775 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5776 /* init the zones */ 5777 /* 5778 * FIX ME: Should check for NULL returns, but if it does fail we are 5779 * doomed to panic anyways... add later maybe. 5780 */ 5781 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5782 sizeof(struct sctp_inpcb), maxsockets); 5783 5784 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5785 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5786 5787 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5788 sizeof(struct sctp_laddr), 5789 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5790 5791 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5792 sizeof(struct sctp_nets), 5793 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5794 5795 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5796 sizeof(struct sctp_tmit_chunk), 5797 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5798 5799 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5800 sizeof(struct sctp_queued_to_read), 5801 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5802 5803 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5804 sizeof(struct sctp_stream_queue_pending), 5805 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5806 5807 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5808 sizeof(struct sctp_asconf), 5809 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5810 5811 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5812 sizeof(struct sctp_asconf_ack), 5813 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5814 5815 5816 /* Master Lock INIT for info structure */ 5817 SCTP_INP_INFO_LOCK_INIT(); 5818 SCTP_STATLOG_INIT_LOCK(); 5819 5820 SCTP_IPI_COUNT_INIT(); 5821 SCTP_IPI_ADDR_INIT(); 5822 #ifdef SCTP_PACKET_LOGGING 5823 SCTP_IP_PKTLOG_INIT(); 5824 #endif 5825 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5826 5827 SCTP_WQ_ADDR_INIT(); 5828 /* not sure if we need all the counts */ 5829 SCTP_BASE_INFO(ipi_count_ep) = 0; 5830 /* assoc/tcb zone info */ 5831 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5832 /* local addrlist zone info */ 5833 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5834 /* remote addrlist zone info */ 5835 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5836 /* chunk info */ 5837 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5838 5839 /* socket queue zone info */ 5840 SCTP_BASE_INFO(ipi_count_readq) = 0; 5841 5842 /* stream out queue cont */ 5843 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5844 5845 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5846 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5847 5848 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5849 5850 /* Init the TIMEWAIT list */ 5851 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5852 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5853 } 5854 sctp_startup_iterator(); 5855 5856 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5857 sctp_startup_mcore_threads(); 5858 #endif 5859 5860 /* 5861 * INIT the default VRF which for BSD is the only one, other O/S's 5862 * may have more. But initially they must start with one and then 5863 * add the VRF's as addresses are added. 5864 */ 5865 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5866 } 5867 5868 /* 5869 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5870 */ 5871 void 5872 sctp_pcb_finish(void) 5873 { 5874 struct sctp_vrflist *vrf_bucket; 5875 struct sctp_vrf *vrf, *nvrf; 5876 struct sctp_ifn *ifn, *nifn; 5877 struct sctp_ifa *ifa, *nifa; 5878 struct sctpvtaghead *chain; 5879 struct sctp_tagblock *twait_block, *prev_twait_block; 5880 struct sctp_laddr *wi, *nwi; 5881 int i; 5882 struct sctp_iterator *it, *nit; 5883 5884 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5885 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5886 return; 5887 } 5888 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5889 /* 5890 * In FreeBSD the iterator thread never exits but we do clean up. 5891 * The only way FreeBSD reaches here is if we have VRF's but we 5892 * still add the ifdef to make it compile on old versions. 5893 */ 5894 retry: 5895 SCTP_IPI_ITERATOR_WQ_LOCK(); 5896 /* 5897 * sctp_iterator_worker() might be working on an it entry without 5898 * holding the lock. We won't find it on the list either and 5899 * continue and free/destroy it. While holding the lock, spin, to 5900 * avoid the race condition as sctp_iterator_worker() will have to 5901 * wait to re-acquire the lock. 5902 */ 5903 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5904 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5905 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5906 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5907 DELAY(10); 5908 goto retry; 5909 } 5910 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5911 if (it->vn != curvnet) { 5912 continue; 5913 } 5914 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5915 if (it->function_atend != NULL) { 5916 (*it->function_atend) (it->pointer, it->val); 5917 } 5918 SCTP_FREE(it, SCTP_M_ITER); 5919 } 5920 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5921 SCTP_ITERATOR_LOCK(); 5922 if ((sctp_it_ctl.cur_it) && 5923 (sctp_it_ctl.cur_it->vn == curvnet)) { 5924 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5925 } 5926 SCTP_ITERATOR_UNLOCK(); 5927 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5928 SCTP_WQ_ADDR_LOCK(); 5929 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5930 LIST_REMOVE(wi, sctp_nxt_addr); 5931 SCTP_DECR_LADDR_COUNT(); 5932 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5933 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5934 } 5935 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5936 } 5937 SCTP_WQ_ADDR_UNLOCK(); 5938 5939 /* 5940 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5941 * destroyed first). 5942 */ 5943 SCTP_IPI_ADDR_WLOCK(); 5944 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5945 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5946 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5947 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5948 /* free the ifa */ 5949 LIST_REMOVE(ifa, next_bucket); 5950 LIST_REMOVE(ifa, next_ifa); 5951 SCTP_FREE(ifa, SCTP_M_IFA); 5952 } 5953 /* free the ifn */ 5954 LIST_REMOVE(ifn, next_bucket); 5955 LIST_REMOVE(ifn, next_ifn); 5956 SCTP_FREE(ifn, SCTP_M_IFN); 5957 } 5958 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5959 /* free the vrf */ 5960 LIST_REMOVE(vrf, next_vrf); 5961 SCTP_FREE(vrf, SCTP_M_VRF); 5962 } 5963 SCTP_IPI_ADDR_WUNLOCK(); 5964 /* free the vrf hashes */ 5965 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5966 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5967 5968 /* 5969 * free the TIMEWAIT list elements malloc'd in the function 5970 * sctp_add_vtag_to_timewait()... 5971 */ 5972 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5973 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5974 if (!LIST_EMPTY(chain)) { 5975 prev_twait_block = NULL; 5976 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5977 if (prev_twait_block) { 5978 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5979 } 5980 prev_twait_block = twait_block; 5981 } 5982 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5983 } 5984 } 5985 5986 /* free the locks and mutexes */ 5987 #ifdef SCTP_PACKET_LOGGING 5988 SCTP_IP_PKTLOG_DESTROY(); 5989 #endif 5990 SCTP_IPI_ADDR_DESTROY(); 5991 SCTP_STATLOG_DESTROY(); 5992 SCTP_INP_INFO_LOCK_DESTROY(); 5993 5994 SCTP_WQ_ADDR_DESTROY(); 5995 5996 /* Get rid of other stuff too. */ 5997 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5998 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5999 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6000 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6001 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6002 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6003 6004 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6005 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6006 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6007 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6008 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6009 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6010 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6011 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6012 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6013 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6014 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6015 #endif 6016 } 6017 6018 6019 int 6020 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6021 int offset, int limit, 6022 struct sockaddr *src, struct sockaddr *dst, 6023 struct sockaddr *altsa, uint16_t port) 6024 { 6025 /* 6026 * grub through the INIT pulling addresses and loading them to the 6027 * nets structure in the asoc. The from address in the mbuf should 6028 * also be loaded (if it is not already). This routine can be called 6029 * with either INIT or INIT-ACK's as long as the m points to the IP 6030 * packet and the offset points to the beginning of the parameters. 6031 */ 6032 struct sctp_inpcb *inp; 6033 struct sctp_nets *net, *nnet, *net_tmp; 6034 struct sctp_paramhdr *phdr, param_buf; 6035 struct sctp_tcb *stcb_tmp; 6036 uint16_t ptype, plen; 6037 struct sockaddr *sa; 6038 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6039 struct sctp_auth_random *p_random = NULL; 6040 uint16_t random_len = 0; 6041 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6042 struct sctp_auth_hmac_algo *hmacs = NULL; 6043 uint16_t hmacs_len = 0; 6044 uint8_t saw_asconf = 0; 6045 uint8_t saw_asconf_ack = 0; 6046 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6047 struct sctp_auth_chunk_list *chunks = NULL; 6048 uint16_t num_chunks = 0; 6049 sctp_key_t *new_key; 6050 uint32_t keylen; 6051 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6052 uint8_t peer_supports_ecn; 6053 uint8_t peer_supports_prsctp; 6054 uint8_t peer_supports_auth; 6055 uint8_t peer_supports_asconf; 6056 uint8_t peer_supports_asconf_ack; 6057 uint8_t peer_supports_reconfig; 6058 uint8_t peer_supports_nrsack; 6059 uint8_t peer_supports_pktdrop; 6060 uint8_t peer_supports_idata; 6061 #ifdef INET 6062 struct sockaddr_in sin; 6063 #endif 6064 #ifdef INET6 6065 struct sockaddr_in6 sin6; 6066 #endif 6067 6068 /* First get the destination address setup too. */ 6069 #ifdef INET 6070 memset(&sin, 0, sizeof(sin)); 6071 sin.sin_family = AF_INET; 6072 sin.sin_len = sizeof(sin); 6073 sin.sin_port = stcb->rport; 6074 #endif 6075 #ifdef INET6 6076 memset(&sin6, 0, sizeof(sin6)); 6077 sin6.sin6_family = AF_INET6; 6078 sin6.sin6_len = sizeof(struct sockaddr_in6); 6079 sin6.sin6_port = stcb->rport; 6080 #endif 6081 if (altsa) { 6082 sa = altsa; 6083 } else { 6084 sa = src; 6085 } 6086 peer_supports_idata = 0; 6087 peer_supports_ecn = 0; 6088 peer_supports_prsctp = 0; 6089 peer_supports_auth = 0; 6090 peer_supports_asconf = 0; 6091 peer_supports_reconfig = 0; 6092 peer_supports_nrsack = 0; 6093 peer_supports_pktdrop = 0; 6094 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6095 /* mark all addresses that we have currently on the list */ 6096 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6097 } 6098 /* does the source address already exist? if so skip it */ 6099 inp = stcb->sctp_ep; 6100 atomic_add_int(&stcb->asoc.refcnt, 1); 6101 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6102 atomic_add_int(&stcb->asoc.refcnt, -1); 6103 6104 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6105 /* we must add the source address */ 6106 /* no scope set here since we have a tcb already. */ 6107 switch (sa->sa_family) { 6108 #ifdef INET 6109 case AF_INET: 6110 if (stcb->asoc.scope.ipv4_addr_legal) { 6111 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6112 return (-1); 6113 } 6114 } 6115 break; 6116 #endif 6117 #ifdef INET6 6118 case AF_INET6: 6119 if (stcb->asoc.scope.ipv6_addr_legal) { 6120 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6121 return (-2); 6122 } 6123 } 6124 break; 6125 #endif 6126 default: 6127 break; 6128 } 6129 } else { 6130 if (net_tmp != NULL && stcb_tmp == stcb) { 6131 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6132 } else if (stcb_tmp != stcb) { 6133 /* It belongs to another association? */ 6134 if (stcb_tmp) 6135 SCTP_TCB_UNLOCK(stcb_tmp); 6136 return (-3); 6137 } 6138 } 6139 if (stcb->asoc.state == 0) { 6140 /* the assoc was freed? */ 6141 return (-4); 6142 } 6143 /* now we must go through each of the params. */ 6144 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6145 while (phdr) { 6146 ptype = ntohs(phdr->param_type); 6147 plen = ntohs(phdr->param_length); 6148 /* 6149 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6150 * (uint32_t)ptype, (int)plen); 6151 */ 6152 if (offset + plen > limit) { 6153 break; 6154 } 6155 if (plen < sizeof(struct sctp_paramhdr)) { 6156 break; 6157 } 6158 #ifdef INET 6159 if (ptype == SCTP_IPV4_ADDRESS) { 6160 if (stcb->asoc.scope.ipv4_addr_legal) { 6161 struct sctp_ipv4addr_param *p4, p4_buf; 6162 6163 /* ok get the v4 address and check/add */ 6164 phdr = sctp_get_next_param(m, offset, 6165 (struct sctp_paramhdr *)&p4_buf, 6166 sizeof(p4_buf)); 6167 if (plen != sizeof(struct sctp_ipv4addr_param) || 6168 phdr == NULL) { 6169 return (-5); 6170 } 6171 p4 = (struct sctp_ipv4addr_param *)phdr; 6172 sin.sin_addr.s_addr = p4->addr; 6173 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6174 /* Skip multi-cast addresses */ 6175 goto next_param; 6176 } 6177 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6178 (sin.sin_addr.s_addr == INADDR_ANY)) { 6179 goto next_param; 6180 } 6181 sa = (struct sockaddr *)&sin; 6182 inp = stcb->sctp_ep; 6183 atomic_add_int(&stcb->asoc.refcnt, 1); 6184 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6185 dst, stcb); 6186 atomic_add_int(&stcb->asoc.refcnt, -1); 6187 6188 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6189 inp == NULL) { 6190 /* we must add the source address */ 6191 /* 6192 * no scope set since we have a tcb 6193 * already 6194 */ 6195 6196 /* 6197 * we must validate the state again 6198 * here 6199 */ 6200 add_it_now: 6201 if (stcb->asoc.state == 0) { 6202 /* the assoc was freed? */ 6203 return (-7); 6204 } 6205 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6206 return (-8); 6207 } 6208 } else if (stcb_tmp == stcb) { 6209 if (stcb->asoc.state == 0) { 6210 /* the assoc was freed? */ 6211 return (-10); 6212 } 6213 if (net != NULL) { 6214 /* clear flag */ 6215 net->dest_state &= 6216 ~SCTP_ADDR_NOT_IN_ASSOC; 6217 } 6218 } else { 6219 /* 6220 * strange, address is in another 6221 * assoc? straighten out locks. 6222 */ 6223 if (stcb_tmp) { 6224 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6225 struct mbuf *op_err; 6226 char msg[SCTP_DIAG_INFO_LEN]; 6227 6228 /* 6229 * in setup state we 6230 * abort this guy 6231 */ 6232 SCTP_SNPRINTF(msg, sizeof(msg), 6233 "%s:%d at %s", __FILE__, __LINE__, __func__); 6234 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6235 msg); 6236 sctp_abort_an_association(stcb_tmp->sctp_ep, 6237 stcb_tmp, op_err, 6238 SCTP_SO_NOT_LOCKED); 6239 goto add_it_now; 6240 } 6241 SCTP_TCB_UNLOCK(stcb_tmp); 6242 } 6243 6244 if (stcb->asoc.state == 0) { 6245 /* the assoc was freed? */ 6246 return (-12); 6247 } 6248 return (-13); 6249 } 6250 } 6251 } else 6252 #endif 6253 #ifdef INET6 6254 if (ptype == SCTP_IPV6_ADDRESS) { 6255 if (stcb->asoc.scope.ipv6_addr_legal) { 6256 /* ok get the v6 address and check/add */ 6257 struct sctp_ipv6addr_param *p6, p6_buf; 6258 6259 phdr = sctp_get_next_param(m, offset, 6260 (struct sctp_paramhdr *)&p6_buf, 6261 sizeof(p6_buf)); 6262 if (plen != sizeof(struct sctp_ipv6addr_param) || 6263 phdr == NULL) { 6264 return (-14); 6265 } 6266 p6 = (struct sctp_ipv6addr_param *)phdr; 6267 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6268 sizeof(p6->addr)); 6269 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6270 /* Skip multi-cast addresses */ 6271 goto next_param; 6272 } 6273 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6274 /* 6275 * Link local make no sense without 6276 * scope 6277 */ 6278 goto next_param; 6279 } 6280 sa = (struct sockaddr *)&sin6; 6281 inp = stcb->sctp_ep; 6282 atomic_add_int(&stcb->asoc.refcnt, 1); 6283 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6284 dst, stcb); 6285 atomic_add_int(&stcb->asoc.refcnt, -1); 6286 if (stcb_tmp == NULL && 6287 (inp == stcb->sctp_ep || inp == NULL)) { 6288 /* 6289 * we must validate the state again 6290 * here 6291 */ 6292 add_it_now6: 6293 if (stcb->asoc.state == 0) { 6294 /* the assoc was freed? */ 6295 return (-16); 6296 } 6297 /* 6298 * we must add the address, no scope 6299 * set 6300 */ 6301 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6302 return (-17); 6303 } 6304 } else if (stcb_tmp == stcb) { 6305 /* 6306 * we must validate the state again 6307 * here 6308 */ 6309 if (stcb->asoc.state == 0) { 6310 /* the assoc was freed? */ 6311 return (-19); 6312 } 6313 if (net != NULL) { 6314 /* clear flag */ 6315 net->dest_state &= 6316 ~SCTP_ADDR_NOT_IN_ASSOC; 6317 } 6318 } else { 6319 /* 6320 * strange, address is in another 6321 * assoc? straighten out locks. 6322 */ 6323 if (stcb_tmp) { 6324 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6325 struct mbuf *op_err; 6326 char msg[SCTP_DIAG_INFO_LEN]; 6327 6328 /* 6329 * in setup state we 6330 * abort this guy 6331 */ 6332 SCTP_SNPRINTF(msg, sizeof(msg), 6333 "%s:%d at %s", __FILE__, __LINE__, __func__); 6334 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6335 msg); 6336 sctp_abort_an_association(stcb_tmp->sctp_ep, 6337 stcb_tmp, op_err, 6338 SCTP_SO_NOT_LOCKED); 6339 goto add_it_now6; 6340 } 6341 SCTP_TCB_UNLOCK(stcb_tmp); 6342 } 6343 if (stcb->asoc.state == 0) { 6344 /* the assoc was freed? */ 6345 return (-21); 6346 } 6347 return (-22); 6348 } 6349 } 6350 } else 6351 #endif 6352 if (ptype == SCTP_ECN_CAPABLE) { 6353 peer_supports_ecn = 1; 6354 } else if (ptype == SCTP_ULP_ADAPTATION) { 6355 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6356 struct sctp_adaptation_layer_indication ai, 6357 *aip; 6358 6359 phdr = sctp_get_next_param(m, offset, 6360 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6361 aip = (struct sctp_adaptation_layer_indication *)phdr; 6362 if (aip) { 6363 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6364 stcb->asoc.adaptation_needed = 1; 6365 } 6366 } 6367 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6368 struct sctp_asconf_addr_param lstore, *fee; 6369 int lptype; 6370 struct sockaddr *lsa = NULL; 6371 #ifdef INET 6372 struct sctp_asconf_addrv4_param *fii; 6373 #endif 6374 6375 if (stcb->asoc.asconf_supported == 0) { 6376 return (-100); 6377 } 6378 if (plen > sizeof(lstore)) { 6379 return (-23); 6380 } 6381 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6382 return (-101); 6383 } 6384 phdr = sctp_get_next_param(m, offset, 6385 (struct sctp_paramhdr *)&lstore, 6386 plen); 6387 if (phdr == NULL) { 6388 return (-24); 6389 } 6390 fee = (struct sctp_asconf_addr_param *)phdr; 6391 lptype = ntohs(fee->addrp.ph.param_type); 6392 switch (lptype) { 6393 #ifdef INET 6394 case SCTP_IPV4_ADDRESS: 6395 if (plen != 6396 sizeof(struct sctp_asconf_addrv4_param)) { 6397 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6398 (int)sizeof(struct sctp_asconf_addrv4_param), 6399 plen); 6400 } else { 6401 fii = (struct sctp_asconf_addrv4_param *)fee; 6402 sin.sin_addr.s_addr = fii->addrp.addr; 6403 lsa = (struct sockaddr *)&sin; 6404 } 6405 break; 6406 #endif 6407 #ifdef INET6 6408 case SCTP_IPV6_ADDRESS: 6409 if (plen != 6410 sizeof(struct sctp_asconf_addr_param)) { 6411 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6412 (int)sizeof(struct sctp_asconf_addr_param), 6413 plen); 6414 } else { 6415 memcpy(sin6.sin6_addr.s6_addr, 6416 fee->addrp.addr, 6417 sizeof(fee->addrp.addr)); 6418 lsa = (struct sockaddr *)&sin6; 6419 } 6420 break; 6421 #endif 6422 default: 6423 break; 6424 } 6425 if (lsa) { 6426 (void)sctp_set_primary_addr(stcb, sa, NULL); 6427 } 6428 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6429 stcb->asoc.peer_supports_nat = 1; 6430 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6431 /* Peer supports pr-sctp */ 6432 peer_supports_prsctp = 1; 6433 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6434 /* A supported extension chunk */ 6435 struct sctp_supported_chunk_types_param *pr_supported; 6436 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6437 int num_ent, i; 6438 6439 if (plen > sizeof(local_store)) { 6440 return (-35); 6441 } 6442 phdr = sctp_get_next_param(m, offset, 6443 (struct sctp_paramhdr *)&local_store, plen); 6444 if (phdr == NULL) { 6445 return (-25); 6446 } 6447 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6448 num_ent = plen - sizeof(struct sctp_paramhdr); 6449 for (i = 0; i < num_ent; i++) { 6450 switch (pr_supported->chunk_types[i]) { 6451 case SCTP_ASCONF: 6452 peer_supports_asconf = 1; 6453 break; 6454 case SCTP_ASCONF_ACK: 6455 peer_supports_asconf_ack = 1; 6456 break; 6457 case SCTP_FORWARD_CUM_TSN: 6458 peer_supports_prsctp = 1; 6459 break; 6460 case SCTP_PACKET_DROPPED: 6461 peer_supports_pktdrop = 1; 6462 break; 6463 case SCTP_NR_SELECTIVE_ACK: 6464 peer_supports_nrsack = 1; 6465 break; 6466 case SCTP_STREAM_RESET: 6467 peer_supports_reconfig = 1; 6468 break; 6469 case SCTP_AUTHENTICATION: 6470 peer_supports_auth = 1; 6471 break; 6472 case SCTP_IDATA: 6473 peer_supports_idata = 1; 6474 break; 6475 default: 6476 /* one I have not learned yet */ 6477 break; 6478 6479 } 6480 } 6481 } else if (ptype == SCTP_RANDOM) { 6482 if (plen > sizeof(random_store)) 6483 break; 6484 if (got_random) { 6485 /* already processed a RANDOM */ 6486 goto next_param; 6487 } 6488 phdr = sctp_get_next_param(m, offset, 6489 (struct sctp_paramhdr *)random_store, 6490 plen); 6491 if (phdr == NULL) 6492 return (-26); 6493 p_random = (struct sctp_auth_random *)phdr; 6494 random_len = plen - sizeof(*p_random); 6495 /* enforce the random length */ 6496 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6497 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6498 return (-27); 6499 } 6500 got_random = 1; 6501 } else if (ptype == SCTP_HMAC_LIST) { 6502 uint16_t num_hmacs; 6503 uint16_t i; 6504 6505 if (plen > sizeof(hmacs_store)) 6506 break; 6507 if (got_hmacs) { 6508 /* already processed a HMAC list */ 6509 goto next_param; 6510 } 6511 phdr = sctp_get_next_param(m, offset, 6512 (struct sctp_paramhdr *)hmacs_store, 6513 plen); 6514 if (phdr == NULL) 6515 return (-28); 6516 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6517 hmacs_len = plen - sizeof(*hmacs); 6518 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6519 /* validate the hmac list */ 6520 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6521 return (-29); 6522 } 6523 if (stcb->asoc.peer_hmacs != NULL) 6524 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6525 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6526 if (stcb->asoc.peer_hmacs != NULL) { 6527 for (i = 0; i < num_hmacs; i++) { 6528 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6529 ntohs(hmacs->hmac_ids[i])); 6530 } 6531 } 6532 got_hmacs = 1; 6533 } else if (ptype == SCTP_CHUNK_LIST) { 6534 int i; 6535 6536 if (plen > sizeof(chunks_store)) 6537 break; 6538 if (got_chklist) { 6539 /* already processed a Chunks list */ 6540 goto next_param; 6541 } 6542 phdr = sctp_get_next_param(m, offset, 6543 (struct sctp_paramhdr *)chunks_store, 6544 plen); 6545 if (phdr == NULL) 6546 return (-30); 6547 chunks = (struct sctp_auth_chunk_list *)phdr; 6548 num_chunks = plen - sizeof(*chunks); 6549 if (stcb->asoc.peer_auth_chunks != NULL) 6550 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6551 else 6552 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6553 for (i = 0; i < num_chunks; i++) { 6554 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6555 stcb->asoc.peer_auth_chunks); 6556 /* record asconf/asconf-ack if listed */ 6557 if (chunks->chunk_types[i] == SCTP_ASCONF) 6558 saw_asconf = 1; 6559 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6560 saw_asconf_ack = 1; 6561 6562 } 6563 got_chklist = 1; 6564 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6565 (ptype == SCTP_STATE_COOKIE) || 6566 (ptype == SCTP_UNRECOG_PARAM) || 6567 (ptype == SCTP_COOKIE_PRESERVE) || 6568 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6569 (ptype == SCTP_ADD_IP_ADDRESS) || 6570 (ptype == SCTP_DEL_IP_ADDRESS) || 6571 (ptype == SCTP_ERROR_CAUSE_IND) || 6572 (ptype == SCTP_SUCCESS_REPORT)) { 6573 /* don't care */ ; 6574 } else { 6575 if ((ptype & 0x8000) == 0x0000) { 6576 /* 6577 * must stop processing the rest of the 6578 * param's. Any report bits were handled 6579 * with the call to 6580 * sctp_arethere_unrecognized_parameters() 6581 * when the INIT or INIT-ACK was first seen. 6582 */ 6583 break; 6584 } 6585 } 6586 6587 next_param: 6588 offset += SCTP_SIZE32(plen); 6589 if (offset >= limit) { 6590 break; 6591 } 6592 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6593 sizeof(param_buf)); 6594 } 6595 /* Now check to see if we need to purge any addresses */ 6596 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6597 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6598 SCTP_ADDR_NOT_IN_ASSOC) { 6599 /* This address has been removed from the asoc */ 6600 /* remove and free it */ 6601 stcb->asoc.numnets--; 6602 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6603 sctp_free_remote_addr(net); 6604 if (net == stcb->asoc.primary_destination) { 6605 stcb->asoc.primary_destination = NULL; 6606 sctp_select_primary_destination(stcb); 6607 } 6608 } 6609 } 6610 if ((stcb->asoc.ecn_supported == 1) && 6611 (peer_supports_ecn == 0)) { 6612 stcb->asoc.ecn_supported = 0; 6613 } 6614 if ((stcb->asoc.prsctp_supported == 1) && 6615 (peer_supports_prsctp == 0)) { 6616 stcb->asoc.prsctp_supported = 0; 6617 } 6618 if ((stcb->asoc.auth_supported == 1) && 6619 ((peer_supports_auth == 0) || 6620 (got_random == 0) || (got_hmacs == 0))) { 6621 stcb->asoc.auth_supported = 0; 6622 } 6623 if ((stcb->asoc.asconf_supported == 1) && 6624 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6625 (stcb->asoc.auth_supported == 0) || 6626 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6627 stcb->asoc.asconf_supported = 0; 6628 } 6629 if ((stcb->asoc.reconfig_supported == 1) && 6630 (peer_supports_reconfig == 0)) { 6631 stcb->asoc.reconfig_supported = 0; 6632 } 6633 if ((stcb->asoc.idata_supported == 1) && 6634 (peer_supports_idata == 0)) { 6635 stcb->asoc.idata_supported = 0; 6636 } 6637 if ((stcb->asoc.nrsack_supported == 1) && 6638 (peer_supports_nrsack == 0)) { 6639 stcb->asoc.nrsack_supported = 0; 6640 } 6641 if ((stcb->asoc.pktdrop_supported == 1) && 6642 (peer_supports_pktdrop == 0)) { 6643 stcb->asoc.pktdrop_supported = 0; 6644 } 6645 /* validate authentication required parameters */ 6646 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6647 /* peer does not support auth but sent a chunks list? */ 6648 return (-31); 6649 } 6650 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6651 /* peer supports asconf but not auth? */ 6652 return (-32); 6653 } else if ((peer_supports_asconf == 1) && 6654 (peer_supports_auth == 1) && 6655 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6656 return (-33); 6657 } 6658 /* concatenate the full random key */ 6659 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6660 if (chunks != NULL) { 6661 keylen += sizeof(*chunks) + num_chunks; 6662 } 6663 new_key = sctp_alloc_key(keylen); 6664 if (new_key != NULL) { 6665 /* copy in the RANDOM */ 6666 if (p_random != NULL) { 6667 keylen = sizeof(*p_random) + random_len; 6668 memcpy(new_key->key, p_random, keylen); 6669 } else { 6670 keylen = 0; 6671 } 6672 /* append in the AUTH chunks */ 6673 if (chunks != NULL) { 6674 memcpy(new_key->key + keylen, chunks, 6675 sizeof(*chunks) + num_chunks); 6676 keylen += sizeof(*chunks) + num_chunks; 6677 } 6678 /* append in the HMACs */ 6679 if (hmacs != NULL) { 6680 memcpy(new_key->key + keylen, hmacs, 6681 sizeof(*hmacs) + hmacs_len); 6682 } 6683 } else { 6684 /* failed to get memory for the key */ 6685 return (-34); 6686 } 6687 if (stcb->asoc.authinfo.peer_random != NULL) 6688 sctp_free_key(stcb->asoc.authinfo.peer_random); 6689 stcb->asoc.authinfo.peer_random = new_key; 6690 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6691 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6692 6693 return (0); 6694 } 6695 6696 int 6697 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6698 struct sctp_nets *net) 6699 { 6700 /* make sure the requested primary address exists in the assoc */ 6701 if (net == NULL && sa) 6702 net = sctp_findnet(stcb, sa); 6703 6704 if (net == NULL) { 6705 /* didn't find the requested primary address! */ 6706 return (-1); 6707 } else { 6708 /* set the primary address */ 6709 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6710 /* Must be confirmed, so queue to set */ 6711 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6712 return (0); 6713 } 6714 stcb->asoc.primary_destination = net; 6715 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6716 sctp_free_remote_addr(stcb->asoc.alternate); 6717 stcb->asoc.alternate = NULL; 6718 } 6719 net = TAILQ_FIRST(&stcb->asoc.nets); 6720 if (net != stcb->asoc.primary_destination) { 6721 /* 6722 * first one on the list is NOT the primary 6723 * sctp_cmpaddr() is much more efficient if the 6724 * primary is the first on the list, make it so. 6725 */ 6726 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6727 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6728 } 6729 return (0); 6730 } 6731 } 6732 6733 int 6734 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6735 { 6736 /* 6737 * This function serves two purposes. It will see if a TAG can be 6738 * re-used and return 1 for yes it is ok and 0 for don't use that 6739 * tag. A secondary function it will do is purge out old tags that 6740 * can be removed. 6741 */ 6742 struct sctpvtaghead *chain; 6743 struct sctp_tagblock *twait_block; 6744 struct sctpasochead *head; 6745 struct sctp_tcb *stcb; 6746 int i; 6747 6748 SCTP_INP_INFO_RLOCK(); 6749 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6750 SCTP_BASE_INFO(hashasocmark))]; 6751 LIST_FOREACH(stcb, head, sctp_asocs) { 6752 /* 6753 * We choose not to lock anything here. TCB's can't be 6754 * removed since we have the read lock, so they can't be 6755 * freed on us, same thing for the INP. I may be wrong with 6756 * this assumption, but we will go with it for now :-) 6757 */ 6758 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6759 continue; 6760 } 6761 if (stcb->asoc.my_vtag == tag) { 6762 /* candidate */ 6763 if (stcb->rport != rport) { 6764 continue; 6765 } 6766 if (stcb->sctp_ep->sctp_lport != lport) { 6767 continue; 6768 } 6769 /* Its a used tag set */ 6770 SCTP_INP_INFO_RUNLOCK(); 6771 return (0); 6772 } 6773 } 6774 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6775 /* Now what about timed wait ? */ 6776 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6777 /* 6778 * Block(s) are present, lets see if we have this tag in the 6779 * list 6780 */ 6781 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6782 if (twait_block->vtag_block[i].v_tag == 0) { 6783 /* not used */ 6784 continue; 6785 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6786 now->tv_sec) { 6787 /* Audit expires this guy */ 6788 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6789 twait_block->vtag_block[i].v_tag = 0; 6790 twait_block->vtag_block[i].lport = 0; 6791 twait_block->vtag_block[i].rport = 0; 6792 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6793 (twait_block->vtag_block[i].lport == lport) && 6794 (twait_block->vtag_block[i].rport == rport)) { 6795 /* Bad tag, sorry :< */ 6796 SCTP_INP_INFO_RUNLOCK(); 6797 return (0); 6798 } 6799 } 6800 } 6801 SCTP_INP_INFO_RUNLOCK(); 6802 return (1); 6803 } 6804 6805 static void 6806 sctp_drain_mbufs(struct sctp_tcb *stcb) 6807 { 6808 /* 6809 * We must hunt this association for MBUF's past the cumack (i.e. 6810 * out of order data that we can renege on). 6811 */ 6812 struct sctp_association *asoc; 6813 struct sctp_tmit_chunk *chk, *nchk; 6814 uint32_t cumulative_tsn_p1; 6815 struct sctp_queued_to_read *control, *ncontrol; 6816 int cnt, strmat; 6817 uint32_t gap, i; 6818 int fnd = 0; 6819 6820 /* We look for anything larger than the cum-ack + 1 */ 6821 6822 asoc = &stcb->asoc; 6823 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6824 /* none we can reneg on. */ 6825 return; 6826 } 6827 SCTP_STAT_INCR(sctps_protocol_drains_done); 6828 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6829 cnt = 0; 6830 /* Ok that was fun, now we will drain all the inbound streams? */ 6831 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6832 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6833 #ifdef INVARIANTS 6834 if (control->on_strm_q != SCTP_ON_ORDERED) { 6835 panic("Huh control: %p on_q: %d -- not ordered?", 6836 control, control->on_strm_q); 6837 } 6838 #endif 6839 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6840 /* Yep it is above cum-ack */ 6841 cnt++; 6842 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6843 KASSERT(control->length > 0, ("control has zero length")); 6844 if (asoc->size_on_all_streams >= control->length) { 6845 asoc->size_on_all_streams -= control->length; 6846 } else { 6847 #ifdef INVARIANTS 6848 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6849 #else 6850 asoc->size_on_all_streams = 0; 6851 #endif 6852 } 6853 sctp_ucount_decr(asoc->cnt_on_all_streams); 6854 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6855 if (control->on_read_q) { 6856 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6857 control->on_read_q = 0; 6858 } 6859 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6860 control->on_strm_q = 0; 6861 if (control->data) { 6862 sctp_m_freem(control->data); 6863 control->data = NULL; 6864 } 6865 sctp_free_remote_addr(control->whoFrom); 6866 /* Now its reasm? */ 6867 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6868 cnt++; 6869 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6870 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6871 if (asoc->size_on_reasm_queue >= chk->send_size) { 6872 asoc->size_on_reasm_queue -= chk->send_size; 6873 } else { 6874 #ifdef INVARIANTS 6875 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6876 #else 6877 asoc->size_on_reasm_queue = 0; 6878 #endif 6879 } 6880 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6881 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6882 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6883 if (chk->data) { 6884 sctp_m_freem(chk->data); 6885 chk->data = NULL; 6886 } 6887 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6888 } 6889 sctp_free_a_readq(stcb, control); 6890 } 6891 } 6892 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6893 #ifdef INVARIANTS 6894 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6895 panic("Huh control: %p on_q: %d -- not unordered?", 6896 control, control->on_strm_q); 6897 } 6898 #endif 6899 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6900 /* Yep it is above cum-ack */ 6901 cnt++; 6902 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6903 KASSERT(control->length > 0, ("control has zero length")); 6904 if (asoc->size_on_all_streams >= control->length) { 6905 asoc->size_on_all_streams -= control->length; 6906 } else { 6907 #ifdef INVARIANTS 6908 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6909 #else 6910 asoc->size_on_all_streams = 0; 6911 #endif 6912 } 6913 sctp_ucount_decr(asoc->cnt_on_all_streams); 6914 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6915 if (control->on_read_q) { 6916 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6917 control->on_read_q = 0; 6918 } 6919 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6920 control->on_strm_q = 0; 6921 if (control->data) { 6922 sctp_m_freem(control->data); 6923 control->data = NULL; 6924 } 6925 sctp_free_remote_addr(control->whoFrom); 6926 /* Now its reasm? */ 6927 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6928 cnt++; 6929 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6930 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6931 if (asoc->size_on_reasm_queue >= chk->send_size) { 6932 asoc->size_on_reasm_queue -= chk->send_size; 6933 } else { 6934 #ifdef INVARIANTS 6935 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6936 #else 6937 asoc->size_on_reasm_queue = 0; 6938 #endif 6939 } 6940 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6941 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6942 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6943 if (chk->data) { 6944 sctp_m_freem(chk->data); 6945 chk->data = NULL; 6946 } 6947 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6948 } 6949 sctp_free_a_readq(stcb, control); 6950 } 6951 } 6952 } 6953 if (cnt) { 6954 /* We must back down to see what the new highest is */ 6955 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6956 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6957 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6958 asoc->highest_tsn_inside_map = i; 6959 fnd = 1; 6960 break; 6961 } 6962 } 6963 if (!fnd) { 6964 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6965 } 6966 6967 /* 6968 * Question, should we go through the delivery queue? The 6969 * only reason things are on here is the app not reading OR 6970 * a p-d-api up. An attacker COULD send enough in to 6971 * initiate the PD-API and then send a bunch of stuff to 6972 * other streams... these would wind up on the delivery 6973 * queue.. and then we would not get to them. But in order 6974 * to do this I then have to back-track and un-deliver 6975 * sequence numbers in streams.. el-yucko. I think for now 6976 * we will NOT look at the delivery queue and leave it to be 6977 * something to consider later. An alternative would be to 6978 * abort the P-D-API with a notification and then deliver 6979 * the data.... Or another method might be to keep track of 6980 * how many times the situation occurs and if we see a 6981 * possible attack underway just abort the association. 6982 */ 6983 #ifdef SCTP_DEBUG 6984 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6985 #endif 6986 /* 6987 * Now do we need to find a new 6988 * asoc->highest_tsn_inside_map? 6989 */ 6990 asoc->last_revoke_count = cnt; 6991 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6992 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6993 /* sa_ignore NO_NULL_CHK */ 6994 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6995 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6996 } 6997 /* 6998 * Another issue, in un-setting the TSN's in the mapping array we 6999 * DID NOT adjust the highest_tsn marker. This will cause one of 7000 * two things to occur. It may cause us to do extra work in checking 7001 * for our mapping array movement. More importantly it may cause us 7002 * to SACK every datagram. This may not be a bad thing though since 7003 * we will recover once we get our cum-ack above and all this stuff 7004 * we dumped recovered. 7005 */ 7006 } 7007 7008 void 7009 sctp_drain() 7010 { 7011 /* 7012 * We must walk the PCB lists for ALL associations here. The system 7013 * is LOW on MBUF's and needs help. This is where reneging will 7014 * occur. We really hope this does NOT happen! 7015 */ 7016 VNET_ITERATOR_DECL(vnet_iter); 7017 VNET_LIST_RLOCK_NOSLEEP(); 7018 VNET_FOREACH(vnet_iter) { 7019 CURVNET_SET(vnet_iter); 7020 struct sctp_inpcb *inp; 7021 struct sctp_tcb *stcb; 7022 7023 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7024 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7025 #ifdef VIMAGE 7026 continue; 7027 #else 7028 return; 7029 #endif 7030 } 7031 SCTP_INP_INFO_RLOCK(); 7032 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7033 /* For each endpoint */ 7034 SCTP_INP_RLOCK(inp); 7035 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7036 /* For each association */ 7037 SCTP_TCB_LOCK(stcb); 7038 sctp_drain_mbufs(stcb); 7039 SCTP_TCB_UNLOCK(stcb); 7040 } 7041 SCTP_INP_RUNLOCK(inp); 7042 } 7043 SCTP_INP_INFO_RUNLOCK(); 7044 CURVNET_RESTORE(); 7045 } 7046 VNET_LIST_RUNLOCK_NOSLEEP(); 7047 } 7048 7049 /* 7050 * start a new iterator 7051 * iterates through all endpoints and associations based on the pcb_state 7052 * flags and asoc_state. "af" (mandatory) is executed for all matching 7053 * assocs and "ef" (optional) is executed when the iterator completes. 7054 * "inpf" (optional) is executed for each new endpoint as it is being 7055 * iterated through. inpe (optional) is called when the inp completes 7056 * its way through all the stcbs. 7057 */ 7058 int 7059 sctp_initiate_iterator(inp_func inpf, 7060 asoc_func af, 7061 inp_func inpe, 7062 uint32_t pcb_state, 7063 uint32_t pcb_features, 7064 uint32_t asoc_state, 7065 void *argp, 7066 uint32_t argi, 7067 end_func ef, 7068 struct sctp_inpcb *s_inp, 7069 uint8_t chunk_output_off) 7070 { 7071 struct sctp_iterator *it = NULL; 7072 7073 if (af == NULL) { 7074 return (-1); 7075 } 7076 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7077 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7078 SCTP_BASE_VAR(sctp_pcb_initialized)); 7079 return (-1); 7080 } 7081 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7082 SCTP_M_ITER); 7083 if (it == NULL) { 7084 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7085 return (-1); 7086 } 7087 memset(it, 0, sizeof(*it)); 7088 it->function_assoc = af; 7089 it->function_inp = inpf; 7090 if (inpf) 7091 it->done_current_ep = 0; 7092 else 7093 it->done_current_ep = 1; 7094 it->function_atend = ef; 7095 it->pointer = argp; 7096 it->val = argi; 7097 it->pcb_flags = pcb_state; 7098 it->pcb_features = pcb_features; 7099 it->asoc_state = asoc_state; 7100 it->function_inp_end = inpe; 7101 it->no_chunk_output = chunk_output_off; 7102 it->vn = curvnet; 7103 if (s_inp) { 7104 /* Assume lock is held here */ 7105 it->inp = s_inp; 7106 SCTP_INP_INCR_REF(it->inp); 7107 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7108 } else { 7109 SCTP_INP_INFO_RLOCK(); 7110 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7111 if (it->inp) { 7112 SCTP_INP_INCR_REF(it->inp); 7113 } 7114 SCTP_INP_INFO_RUNLOCK(); 7115 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7116 7117 } 7118 SCTP_IPI_ITERATOR_WQ_LOCK(); 7119 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7120 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7121 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7122 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7123 SCTP_FREE(it, SCTP_M_ITER); 7124 return (-1); 7125 } 7126 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7127 if (sctp_it_ctl.iterator_running == 0) { 7128 sctp_wakeup_iterator(); 7129 } 7130 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7131 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7132 return (0); 7133 } 7134