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 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 205 if (sctp_ifnp->ifn_index == ifn_index) { 206 return (sctp_ifnp); 207 } 208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 209 return (sctp_ifnp); 210 } 211 } 212 return (NULL); 213 } 214 215 216 struct sctp_vrf * 217 sctp_find_vrf(uint32_t vrf_id) 218 { 219 struct sctp_vrflist *bucket; 220 struct sctp_vrf *liste; 221 222 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 223 LIST_FOREACH(liste, bucket, next_vrf) { 224 if (vrf_id == liste->vrf_id) { 225 return (liste); 226 } 227 } 228 return (NULL); 229 } 230 231 232 void 233 sctp_free_vrf(struct sctp_vrf *vrf) 234 { 235 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 236 if (vrf->vrf_addr_hash) { 237 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 238 vrf->vrf_addr_hash = NULL; 239 } 240 /* We zero'd the count */ 241 LIST_REMOVE(vrf, next_vrf); 242 SCTP_FREE(vrf, SCTP_M_VRF); 243 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 244 } 245 } 246 247 248 void 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 250 { 251 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 252 /* We zero'd the count */ 253 if (sctp_ifnp->vrf) { 254 sctp_free_vrf(sctp_ifnp->vrf); 255 } 256 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 257 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 258 } 259 } 260 261 262 void 263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 264 { 265 struct sctp_ifn *sctp_ifnp; 266 267 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 268 if (sctp_ifnp != NULL) { 269 sctp_ifnp->ifn_mtu = mtu; 270 } 271 } 272 273 274 void 275 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 276 { 277 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 278 /* We zero'd the count */ 279 if (sctp_ifap->ifn_p) { 280 sctp_free_ifn(sctp_ifap->ifn_p); 281 } 282 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 283 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 284 } 285 } 286 287 288 static void 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 290 { 291 struct sctp_ifn *found; 292 293 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 294 if (found == NULL) { 295 /* Not in the list.. sorry */ 296 return; 297 } 298 if (hold_addr_lock == 0) 299 SCTP_IPI_ADDR_WLOCK(); 300 LIST_REMOVE(sctp_ifnp, next_bucket); 301 LIST_REMOVE(sctp_ifnp, next_ifn); 302 if (hold_addr_lock == 0) 303 SCTP_IPI_ADDR_WUNLOCK(); 304 /* Take away the reference, and possibly free it */ 305 sctp_free_ifn(sctp_ifnp); 306 } 307 308 309 void 310 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 311 const char *if_name, uint32_t ifn_index) 312 { 313 struct sctp_vrf *vrf; 314 struct sctp_ifa *sctp_ifap; 315 316 SCTP_IPI_ADDR_RLOCK(); 317 vrf = sctp_find_vrf(vrf_id); 318 if (vrf == NULL) { 319 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 320 goto out; 321 322 } 323 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 324 if (sctp_ifap == NULL) { 325 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 326 goto out; 327 } 328 if (sctp_ifap->ifn_p == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 330 goto out; 331 } 332 if (if_name) { 333 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 334 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 335 sctp_ifap->ifn_p->ifn_name, if_name); 336 goto out; 337 } 338 } else { 339 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 340 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 341 sctp_ifap->ifn_p->ifn_index, ifn_index); 342 goto out; 343 } 344 } 345 346 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 347 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 348 out: 349 SCTP_IPI_ADDR_RUNLOCK(); 350 } 351 352 353 void 354 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 355 const char *if_name, uint32_t ifn_index) 356 { 357 struct sctp_vrf *vrf; 358 struct sctp_ifa *sctp_ifap; 359 360 SCTP_IPI_ADDR_RLOCK(); 361 vrf = sctp_find_vrf(vrf_id); 362 if (vrf == NULL) { 363 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 364 goto out; 365 366 } 367 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 368 if (sctp_ifap == NULL) { 369 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 370 goto out; 371 } 372 if (sctp_ifap->ifn_p == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 374 goto out; 375 } 376 if (if_name) { 377 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 378 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 379 sctp_ifap->ifn_p->ifn_name, if_name); 380 goto out; 381 } 382 } else { 383 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 384 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 385 sctp_ifap->ifn_p->ifn_index, ifn_index); 386 goto out; 387 } 388 } 389 390 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 391 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 392 out: 393 SCTP_IPI_ADDR_RUNLOCK(); 394 } 395 396 397 /*- 398 * Add an ifa to an ifn. 399 * Register the interface as necessary. 400 * NOTE: ADDR write lock MUST be held. 401 */ 402 static void 403 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 404 { 405 int ifa_af; 406 407 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 408 sctp_ifap->ifn_p = sctp_ifnp; 409 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 410 /* update address counts */ 411 sctp_ifnp->ifa_count++; 412 ifa_af = sctp_ifap->address.sa.sa_family; 413 switch (ifa_af) { 414 #ifdef INET 415 case AF_INET: 416 sctp_ifnp->num_v4++; 417 break; 418 #endif 419 #ifdef INET6 420 case AF_INET6: 421 sctp_ifnp->num_v6++; 422 break; 423 #endif 424 default: 425 break; 426 } 427 if (sctp_ifnp->ifa_count == 1) { 428 /* register the new interface */ 429 sctp_ifnp->registered_af = ifa_af; 430 } 431 } 432 433 434 /*- 435 * Remove an ifa from its ifn. 436 * If no more addresses exist, remove the ifn too. Otherwise, re-register 437 * the interface based on the remaining address families left. 438 * NOTE: ADDR write lock MUST be held. 439 */ 440 static void 441 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 442 { 443 LIST_REMOVE(sctp_ifap, next_ifa); 444 if (sctp_ifap->ifn_p) { 445 /* update address counts */ 446 sctp_ifap->ifn_p->ifa_count--; 447 switch (sctp_ifap->address.sa.sa_family) { 448 #ifdef INET 449 case AF_INET: 450 sctp_ifap->ifn_p->num_v4--; 451 break; 452 #endif 453 #ifdef INET6 454 case AF_INET6: 455 sctp_ifap->ifn_p->num_v6--; 456 break; 457 #endif 458 default: 459 break; 460 } 461 462 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 463 /* remove the ifn, possibly freeing it */ 464 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 465 } else { 466 /* re-register address family type, if needed */ 467 if ((sctp_ifap->ifn_p->num_v6 == 0) && 468 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 469 sctp_ifap->ifn_p->registered_af = AF_INET; 470 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 471 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 472 sctp_ifap->ifn_p->registered_af = AF_INET6; 473 } 474 /* free the ifn refcount */ 475 sctp_free_ifn(sctp_ifap->ifn_p); 476 } 477 sctp_ifap->ifn_p = NULL; 478 } 479 } 480 481 482 struct sctp_ifa * 483 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 484 uint32_t ifn_type, const char *if_name, void *ifa, 485 struct sockaddr *addr, uint32_t ifa_flags, 486 int dynamic_add) 487 { 488 struct sctp_vrf *vrf; 489 struct sctp_ifn *sctp_ifnp = NULL; 490 struct sctp_ifa *sctp_ifap = NULL; 491 struct sctp_ifalist *hash_addr_head; 492 struct sctp_ifnlist *hash_ifn_head; 493 uint32_t hash_of_addr; 494 int new_ifn_af = 0; 495 496 #ifdef SCTP_DEBUG 497 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 498 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 499 #endif 500 SCTP_IPI_ADDR_WLOCK(); 501 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 502 if (sctp_ifnp) { 503 vrf = sctp_ifnp->vrf; 504 } else { 505 vrf = sctp_find_vrf(vrf_id); 506 if (vrf == NULL) { 507 vrf = sctp_allocate_vrf(vrf_id); 508 if (vrf == NULL) { 509 SCTP_IPI_ADDR_WUNLOCK(); 510 return (NULL); 511 } 512 } 513 } 514 if (sctp_ifnp == NULL) { 515 /* 516 * build one and add it, can't hold lock until after malloc 517 * done though. 518 */ 519 SCTP_IPI_ADDR_WUNLOCK(); 520 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 521 sizeof(struct sctp_ifn), SCTP_M_IFN); 522 if (sctp_ifnp == NULL) { 523 #ifdef INVARIANTS 524 panic("No memory for IFN"); 525 #endif 526 return (NULL); 527 } 528 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 529 sctp_ifnp->ifn_index = ifn_index; 530 sctp_ifnp->ifn_p = ifn; 531 sctp_ifnp->ifn_type = ifn_type; 532 sctp_ifnp->refcount = 0; 533 sctp_ifnp->vrf = vrf; 534 atomic_add_int(&vrf->refcount, 1); 535 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 536 if (if_name != NULL) { 537 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 538 } else { 539 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 540 } 541 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 542 LIST_INIT(&sctp_ifnp->ifalist); 543 SCTP_IPI_ADDR_WLOCK(); 544 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 545 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 546 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 547 new_ifn_af = 1; 548 } 549 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 550 if (sctp_ifap) { 551 /* Hmm, it already exists? */ 552 if ((sctp_ifap->ifn_p) && 553 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 554 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 555 sctp_ifap->ifn_p->ifn_name, ifn_index, 556 (void *)sctp_ifap); 557 if (new_ifn_af) { 558 /* Remove the created one that we don't want */ 559 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 560 } 561 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 562 /* easy to solve, just switch back to active */ 563 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 564 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 565 sctp_ifap->ifn_p = sctp_ifnp; 566 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 567 } 568 exit_stage_left: 569 SCTP_IPI_ADDR_WUNLOCK(); 570 return (sctp_ifap); 571 } else { 572 if (sctp_ifap->ifn_p) { 573 /* 574 * The last IFN gets the address, remove the 575 * old one 576 */ 577 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 578 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 579 sctp_ifap->ifn_p->ifn_index, if_name, 580 ifn_index); 581 /* remove the address from the old ifn */ 582 sctp_remove_ifa_from_ifn(sctp_ifap); 583 /* move the address over to the new ifn */ 584 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 585 goto exit_stage_left; 586 } else { 587 /* repair ifnp which was NULL ? */ 588 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 589 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 590 (void *)sctp_ifnp, (void *)sctp_ifap); 591 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 592 } 593 goto exit_stage_left; 594 } 595 } 596 SCTP_IPI_ADDR_WUNLOCK(); 597 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 598 if (sctp_ifap == NULL) { 599 #ifdef INVARIANTS 600 panic("No memory for IFA"); 601 #endif 602 return (NULL); 603 } 604 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 605 sctp_ifap->ifn_p = sctp_ifnp; 606 atomic_add_int(&sctp_ifnp->refcount, 1); 607 sctp_ifap->vrf_id = vrf_id; 608 sctp_ifap->ifa = ifa; 609 memcpy(&sctp_ifap->address, addr, addr->sa_len); 610 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 611 sctp_ifap->flags = ifa_flags; 612 /* Set scope */ 613 switch (sctp_ifap->address.sa.sa_family) { 614 #ifdef INET 615 case AF_INET: 616 { 617 struct sockaddr_in *sin; 618 619 sin = &sctp_ifap->address.sin; 620 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 621 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 622 sctp_ifap->src_is_loop = 1; 623 } 624 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 625 sctp_ifap->src_is_priv = 1; 626 } 627 sctp_ifnp->num_v4++; 628 if (new_ifn_af) 629 new_ifn_af = AF_INET; 630 break; 631 } 632 #endif 633 #ifdef INET6 634 case AF_INET6: 635 { 636 /* ok to use deprecated addresses? */ 637 struct sockaddr_in6 *sin6; 638 639 sin6 = &sctp_ifap->address.sin6; 640 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 641 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 642 sctp_ifap->src_is_loop = 1; 643 } 644 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 645 sctp_ifap->src_is_priv = 1; 646 } 647 sctp_ifnp->num_v6++; 648 if (new_ifn_af) 649 new_ifn_af = AF_INET6; 650 break; 651 } 652 #endif 653 default: 654 new_ifn_af = 0; 655 break; 656 } 657 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 658 659 if ((sctp_ifap->src_is_priv == 0) && 660 (sctp_ifap->src_is_loop == 0)) { 661 sctp_ifap->src_is_glob = 1; 662 } 663 SCTP_IPI_ADDR_WLOCK(); 664 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 665 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 666 sctp_ifap->refcount = 1; 667 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 668 sctp_ifnp->ifa_count++; 669 vrf->total_ifa_count++; 670 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 671 if (new_ifn_af) { 672 sctp_ifnp->registered_af = new_ifn_af; 673 } 674 SCTP_IPI_ADDR_WUNLOCK(); 675 if (dynamic_add) { 676 /* 677 * Bump up the refcount so that when the timer completes it 678 * will drop back down. 679 */ 680 struct sctp_laddr *wi; 681 682 atomic_add_int(&sctp_ifap->refcount, 1); 683 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 684 if (wi == NULL) { 685 /* 686 * Gak, what can we do? We have lost an address 687 * change can you say HOSED? 688 */ 689 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 690 /* Opps, must decrement the count */ 691 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 692 if_name); 693 return (NULL); 694 } 695 SCTP_INCR_LADDR_COUNT(); 696 memset(wi, 0, sizeof(*wi)); 697 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 698 wi->ifa = sctp_ifap; 699 wi->action = SCTP_ADD_IP_ADDRESS; 700 701 SCTP_WQ_ADDR_LOCK(); 702 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 703 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 704 (struct sctp_inpcb *)NULL, 705 (struct sctp_tcb *)NULL, 706 (struct sctp_nets *)NULL); 707 SCTP_WQ_ADDR_UNLOCK(); 708 } else { 709 /* it's ready for use */ 710 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 711 } 712 return (sctp_ifap); 713 } 714 715 void 716 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 717 uint32_t ifn_index, const char *if_name) 718 { 719 struct sctp_vrf *vrf; 720 struct sctp_ifa *sctp_ifap = NULL; 721 722 SCTP_IPI_ADDR_WLOCK(); 723 vrf = sctp_find_vrf(vrf_id); 724 if (vrf == NULL) { 725 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 726 goto out_now; 727 } 728 729 #ifdef SCTP_DEBUG 730 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 731 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 732 #endif 733 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 734 if (sctp_ifap) { 735 /* Validate the delete */ 736 if (sctp_ifap->ifn_p) { 737 int valid = 0; 738 739 /*- 740 * The name has priority over the ifn_index 741 * if its given. 742 */ 743 if (if_name) { 744 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 745 /* They match its a correct delete */ 746 valid = 1; 747 } 748 } 749 if (!valid) { 750 /* last ditch check ifn_index */ 751 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 752 valid = 1; 753 } 754 } 755 if (!valid) { 756 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 757 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 759 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 760 SCTP_IPI_ADDR_WUNLOCK(); 761 return; 762 } 763 } 764 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 765 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 766 /* 767 * We don't set the flag. This means that the structure will 768 * hang around in EP's that have bound specific to it until 769 * they close. This gives us TCP like behavior if someone 770 * removes an address (or for that matter adds it right 771 * back). 772 */ 773 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 774 vrf->total_ifa_count--; 775 LIST_REMOVE(sctp_ifap, next_bucket); 776 sctp_remove_ifa_from_ifn(sctp_ifap); 777 } 778 #ifdef SCTP_DEBUG 779 else { 780 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 781 ifn_index); 782 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 783 } 784 #endif 785 786 out_now: 787 SCTP_IPI_ADDR_WUNLOCK(); 788 if (sctp_ifap) { 789 struct sctp_laddr *wi; 790 791 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 792 if (wi == NULL) { 793 /* 794 * Gak, what can we do? We have lost an address 795 * change can you say HOSED? 796 */ 797 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 798 799 /* Oops, must decrement the count */ 800 sctp_free_ifa(sctp_ifap); 801 return; 802 } 803 SCTP_INCR_LADDR_COUNT(); 804 memset(wi, 0, sizeof(*wi)); 805 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 806 wi->ifa = sctp_ifap; 807 wi->action = SCTP_DEL_IP_ADDRESS; 808 SCTP_WQ_ADDR_LOCK(); 809 /* 810 * Should this really be a tailq? As it is we will process 811 * the newest first :-0 812 */ 813 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 814 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 815 (struct sctp_inpcb *)NULL, 816 (struct sctp_tcb *)NULL, 817 (struct sctp_nets *)NULL); 818 SCTP_WQ_ADDR_UNLOCK(); 819 } 820 return; 821 } 822 823 824 static int 825 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 826 { 827 int loopback_scope; 828 #if defined(INET) 829 int ipv4_local_scope, ipv4_addr_legal; 830 #endif 831 #if defined(INET6) 832 int local_scope, site_scope, ipv6_addr_legal; 833 #endif 834 struct sctp_vrf *vrf; 835 struct sctp_ifn *sctp_ifn; 836 struct sctp_ifa *sctp_ifa; 837 838 loopback_scope = stcb->asoc.scope.loopback_scope; 839 #if defined(INET) 840 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 841 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 842 #endif 843 #if defined(INET6) 844 local_scope = stcb->asoc.scope.local_scope; 845 site_scope = stcb->asoc.scope.site_scope; 846 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 847 #endif 848 849 SCTP_IPI_ADDR_RLOCK(); 850 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 851 if (vrf == NULL) { 852 /* no vrf, no addresses */ 853 SCTP_IPI_ADDR_RUNLOCK(); 854 return (0); 855 } 856 857 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 858 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 859 if ((loopback_scope == 0) && 860 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 861 continue; 862 } 863 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 864 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 865 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 866 /* 867 * We allow pending addresses, where 868 * we have sent an asconf-add to be 869 * considered valid. 870 */ 871 continue; 872 } 873 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 874 continue; 875 } 876 switch (sctp_ifa->address.sa.sa_family) { 877 #ifdef INET 878 case AF_INET: 879 if (ipv4_addr_legal) { 880 struct sockaddr_in *sin, 881 *rsin; 882 883 sin = &sctp_ifa->address.sin; 884 rsin = (struct sockaddr_in *)to; 885 if ((ipv4_local_scope == 0) && 886 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 887 continue; 888 } 889 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 890 &sin->sin_addr) != 0) { 891 continue; 892 } 893 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 894 SCTP_IPI_ADDR_RUNLOCK(); 895 return (1); 896 } 897 } 898 break; 899 #endif 900 #ifdef INET6 901 case AF_INET6: 902 if (ipv6_addr_legal) { 903 struct sockaddr_in6 *sin6, 904 *rsin6; 905 906 sin6 = &sctp_ifa->address.sin6; 907 rsin6 = (struct sockaddr_in6 *)to; 908 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 909 &sin6->sin6_addr) != 0) { 910 continue; 911 } 912 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 913 if (local_scope == 0) 914 continue; 915 if (sin6->sin6_scope_id == 0) { 916 if (sa6_recoverscope(sin6) != 0) 917 continue; 918 } 919 } 920 if ((site_scope == 0) && 921 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 922 continue; 923 } 924 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 925 SCTP_IPI_ADDR_RUNLOCK(); 926 return (1); 927 } 928 } 929 break; 930 #endif 931 default: 932 /* TSNH */ 933 break; 934 } 935 } 936 } 937 } else { 938 struct sctp_laddr *laddr; 939 940 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 941 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 942 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 943 continue; 944 } 945 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 946 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 947 /* 948 * We allow pending addresses, where we have 949 * sent an asconf-add to be considered 950 * valid. 951 */ 952 continue; 953 } 954 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 955 continue; 956 } 957 switch (to->sa_family) { 958 #ifdef INET 959 case AF_INET: 960 { 961 struct sockaddr_in *sin, *rsin; 962 963 sin = &laddr->ifa->address.sin; 964 rsin = (struct sockaddr_in *)to; 965 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 966 SCTP_IPI_ADDR_RUNLOCK(); 967 return (1); 968 } 969 break; 970 } 971 #endif 972 #ifdef INET6 973 case AF_INET6: 974 { 975 struct sockaddr_in6 *sin6, *rsin6; 976 977 sin6 = &laddr->ifa->address.sin6; 978 rsin6 = (struct sockaddr_in6 *)to; 979 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 980 SCTP_IPI_ADDR_RUNLOCK(); 981 return (1); 982 } 983 break; 984 } 985 986 #endif 987 default: 988 /* TSNH */ 989 break; 990 } 991 992 } 993 } 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (0); 996 } 997 998 999 static struct sctp_tcb * 1000 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1001 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1002 { 1003 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1004 /* 1005 * If we support the TCP model, then we must now dig through to see 1006 * if we can find our endpoint in the list of tcp ep's. 1007 */ 1008 uint16_t lport, rport; 1009 struct sctppcbhead *ephead; 1010 struct sctp_inpcb *inp; 1011 struct sctp_laddr *laddr; 1012 struct sctp_tcb *stcb; 1013 struct sctp_nets *net; 1014 1015 if ((to == NULL) || (from == NULL)) { 1016 return (NULL); 1017 } 1018 1019 switch (to->sa_family) { 1020 #ifdef INET 1021 case AF_INET: 1022 if (from->sa_family == AF_INET) { 1023 lport = ((struct sockaddr_in *)to)->sin_port; 1024 rport = ((struct sockaddr_in *)from)->sin_port; 1025 } else { 1026 return (NULL); 1027 } 1028 break; 1029 #endif 1030 #ifdef INET6 1031 case AF_INET6: 1032 if (from->sa_family == AF_INET6) { 1033 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1034 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1035 } else { 1036 return (NULL); 1037 } 1038 break; 1039 #endif 1040 default: 1041 return (NULL); 1042 } 1043 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1044 /* 1045 * Ok now for each of the guys in this bucket we must look and see: 1046 * - Does the remote port match. - Does there single association's 1047 * addresses match this address (to). If so we update p_ep to point 1048 * to this ep and return the tcb from it. 1049 */ 1050 LIST_FOREACH(inp, ephead, sctp_hash) { 1051 SCTP_INP_RLOCK(inp); 1052 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1053 SCTP_INP_RUNLOCK(inp); 1054 continue; 1055 } 1056 if (lport != inp->sctp_lport) { 1057 SCTP_INP_RUNLOCK(inp); 1058 continue; 1059 } 1060 switch (to->sa_family) { 1061 #ifdef INET 1062 case AF_INET: 1063 { 1064 struct sockaddr_in *sin; 1065 1066 sin = (struct sockaddr_in *)to; 1067 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1068 &sin->sin_addr) != 0) { 1069 SCTP_INP_RUNLOCK(inp); 1070 continue; 1071 } 1072 break; 1073 } 1074 #endif 1075 #ifdef INET6 1076 case AF_INET6: 1077 { 1078 struct sockaddr_in6 *sin6; 1079 1080 sin6 = (struct sockaddr_in6 *)to; 1081 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1082 &sin6->sin6_addr) != 0) { 1083 SCTP_INP_RUNLOCK(inp); 1084 continue; 1085 } 1086 break; 1087 } 1088 #endif 1089 default: 1090 SCTP_INP_RUNLOCK(inp); 1091 continue; 1092 } 1093 if (inp->def_vrf_id != vrf_id) { 1094 SCTP_INP_RUNLOCK(inp); 1095 continue; 1096 } 1097 /* check to see if the ep has one of the addresses */ 1098 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1099 /* We are NOT bound all, so look further */ 1100 int match = 0; 1101 1102 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1103 1104 if (laddr->ifa == NULL) { 1105 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1106 continue; 1107 } 1108 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1109 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1110 continue; 1111 } 1112 if (laddr->ifa->address.sa.sa_family == 1113 to->sa_family) { 1114 /* see if it matches */ 1115 #ifdef INET 1116 if (from->sa_family == AF_INET) { 1117 struct sockaddr_in *intf_addr, 1118 *sin; 1119 1120 intf_addr = &laddr->ifa->address.sin; 1121 sin = (struct sockaddr_in *)to; 1122 if (sin->sin_addr.s_addr == 1123 intf_addr->sin_addr.s_addr) { 1124 match = 1; 1125 break; 1126 } 1127 } 1128 #endif 1129 #ifdef INET6 1130 if (from->sa_family == AF_INET6) { 1131 struct sockaddr_in6 *intf_addr6; 1132 struct sockaddr_in6 *sin6; 1133 1134 sin6 = (struct sockaddr_in6 *) 1135 to; 1136 intf_addr6 = &laddr->ifa->address.sin6; 1137 1138 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1139 intf_addr6)) { 1140 match = 1; 1141 break; 1142 } 1143 } 1144 #endif 1145 } 1146 } 1147 if (match == 0) { 1148 /* This endpoint does not have this address */ 1149 SCTP_INP_RUNLOCK(inp); 1150 continue; 1151 } 1152 } 1153 /* 1154 * Ok if we hit here the ep has the address, does it hold 1155 * the tcb? 1156 */ 1157 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1158 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1159 if (stcb == NULL) { 1160 SCTP_INP_RUNLOCK(inp); 1161 continue; 1162 } 1163 SCTP_TCB_LOCK(stcb); 1164 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1165 SCTP_TCB_UNLOCK(stcb); 1166 SCTP_INP_RUNLOCK(inp); 1167 continue; 1168 } 1169 if (stcb->rport != rport) { 1170 /* remote port does not match. */ 1171 SCTP_TCB_UNLOCK(stcb); 1172 SCTP_INP_RUNLOCK(inp); 1173 continue; 1174 } 1175 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1176 SCTP_TCB_UNLOCK(stcb); 1177 SCTP_INP_RUNLOCK(inp); 1178 continue; 1179 } 1180 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1181 SCTP_TCB_UNLOCK(stcb); 1182 SCTP_INP_RUNLOCK(inp); 1183 continue; 1184 } 1185 /* Does this TCB have a matching address? */ 1186 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1187 1188 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1189 /* not the same family, can't be a match */ 1190 continue; 1191 } 1192 switch (from->sa_family) { 1193 #ifdef INET 1194 case AF_INET: 1195 { 1196 struct sockaddr_in *sin, *rsin; 1197 1198 sin = (struct sockaddr_in *)&net->ro._l_addr; 1199 rsin = (struct sockaddr_in *)from; 1200 if (sin->sin_addr.s_addr == 1201 rsin->sin_addr.s_addr) { 1202 /* found it */ 1203 if (netp != NULL) { 1204 *netp = net; 1205 } 1206 /* 1207 * Update the endpoint 1208 * pointer 1209 */ 1210 *inp_p = inp; 1211 SCTP_INP_RUNLOCK(inp); 1212 return (stcb); 1213 } 1214 break; 1215 } 1216 #endif 1217 #ifdef INET6 1218 case AF_INET6: 1219 { 1220 struct sockaddr_in6 *sin6, *rsin6; 1221 1222 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1223 rsin6 = (struct sockaddr_in6 *)from; 1224 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1225 rsin6)) { 1226 /* found it */ 1227 if (netp != NULL) { 1228 *netp = net; 1229 } 1230 /* 1231 * Update the endpoint 1232 * pointer 1233 */ 1234 *inp_p = inp; 1235 SCTP_INP_RUNLOCK(inp); 1236 return (stcb); 1237 } 1238 break; 1239 } 1240 #endif 1241 default: 1242 /* TSNH */ 1243 break; 1244 } 1245 } 1246 SCTP_TCB_UNLOCK(stcb); 1247 SCTP_INP_RUNLOCK(inp); 1248 } 1249 return (NULL); 1250 } 1251 1252 1253 /* 1254 * rules for use 1255 * 1256 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1257 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1258 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1259 * NULL. 1260 */ 1261 1262 struct sctp_tcb * 1263 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1264 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1265 { 1266 struct sctpasochead *head; 1267 struct sctp_inpcb *inp; 1268 struct sctp_tcb *stcb = NULL; 1269 struct sctp_nets *net; 1270 uint16_t rport; 1271 1272 inp = *inp_p; 1273 switch (remote->sa_family) { 1274 #ifdef INET 1275 case AF_INET: 1276 rport = (((struct sockaddr_in *)remote)->sin_port); 1277 break; 1278 #endif 1279 #ifdef INET6 1280 case AF_INET6: 1281 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1282 break; 1283 #endif 1284 default: 1285 return (NULL); 1286 } 1287 if (locked_tcb) { 1288 /* 1289 * UN-lock so we can do proper locking here this occurs when 1290 * called from load_addresses_from_init. 1291 */ 1292 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1293 SCTP_TCB_UNLOCK(locked_tcb); 1294 } 1295 SCTP_INP_INFO_RLOCK(); 1296 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1297 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1298 /*- 1299 * Now either this guy is our listener or it's the 1300 * connector. If it is the one that issued the connect, then 1301 * it's only chance is to be the first TCB in the list. If 1302 * it is the acceptor, then do the special_lookup to hash 1303 * and find the real inp. 1304 */ 1305 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1306 /* to is peer addr, from is my addr */ 1307 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1308 netp, inp->def_vrf_id); 1309 if ((stcb != NULL) && (locked_tcb == NULL)) { 1310 /* we have a locked tcb, lower refcount */ 1311 SCTP_INP_DECR_REF(inp); 1312 } 1313 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1314 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1315 SCTP_TCB_LOCK(locked_tcb); 1316 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1317 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1318 } 1319 SCTP_INP_INFO_RUNLOCK(); 1320 return (stcb); 1321 } else { 1322 SCTP_INP_WLOCK(inp); 1323 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1324 goto null_return; 1325 } 1326 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1327 if (stcb == NULL) { 1328 goto null_return; 1329 } 1330 SCTP_TCB_LOCK(stcb); 1331 1332 if (stcb->rport != rport) { 1333 /* remote port does not match. */ 1334 SCTP_TCB_UNLOCK(stcb); 1335 goto null_return; 1336 } 1337 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1338 SCTP_TCB_UNLOCK(stcb); 1339 goto null_return; 1340 } 1341 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1342 SCTP_TCB_UNLOCK(stcb); 1343 goto null_return; 1344 } 1345 /* now look at the list of remote addresses */ 1346 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1347 #ifdef INVARIANTS 1348 if (net == (TAILQ_NEXT(net, sctp_next))) { 1349 panic("Corrupt net list"); 1350 } 1351 #endif 1352 if (net->ro._l_addr.sa.sa_family != 1353 remote->sa_family) { 1354 /* not the same family */ 1355 continue; 1356 } 1357 switch (remote->sa_family) { 1358 #ifdef INET 1359 case AF_INET: 1360 { 1361 struct sockaddr_in *sin, 1362 *rsin; 1363 1364 sin = (struct sockaddr_in *) 1365 &net->ro._l_addr; 1366 rsin = (struct sockaddr_in *)remote; 1367 if (sin->sin_addr.s_addr == 1368 rsin->sin_addr.s_addr) { 1369 /* found it */ 1370 if (netp != NULL) { 1371 *netp = net; 1372 } 1373 if (locked_tcb == NULL) { 1374 SCTP_INP_DECR_REF(inp); 1375 } else if (locked_tcb != stcb) { 1376 SCTP_TCB_LOCK(locked_tcb); 1377 } 1378 if (locked_tcb) { 1379 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1380 } 1381 1382 SCTP_INP_WUNLOCK(inp); 1383 SCTP_INP_INFO_RUNLOCK(); 1384 return (stcb); 1385 } 1386 break; 1387 } 1388 #endif 1389 #ifdef INET6 1390 case AF_INET6: 1391 { 1392 struct sockaddr_in6 *sin6, 1393 *rsin6; 1394 1395 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1396 rsin6 = (struct sockaddr_in6 *)remote; 1397 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1398 rsin6)) { 1399 /* found it */ 1400 if (netp != NULL) { 1401 *netp = net; 1402 } 1403 if (locked_tcb == NULL) { 1404 SCTP_INP_DECR_REF(inp); 1405 } else if (locked_tcb != stcb) { 1406 SCTP_TCB_LOCK(locked_tcb); 1407 } 1408 if (locked_tcb) { 1409 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1410 } 1411 SCTP_INP_WUNLOCK(inp); 1412 SCTP_INP_INFO_RUNLOCK(); 1413 return (stcb); 1414 } 1415 break; 1416 } 1417 #endif 1418 default: 1419 /* TSNH */ 1420 break; 1421 } 1422 } 1423 SCTP_TCB_UNLOCK(stcb); 1424 } 1425 } else { 1426 SCTP_INP_WLOCK(inp); 1427 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1428 goto null_return; 1429 } 1430 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1431 inp->sctp_hashmark)]; 1432 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1433 if (stcb->rport != rport) { 1434 /* remote port does not match */ 1435 continue; 1436 } 1437 SCTP_TCB_LOCK(stcb); 1438 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1439 SCTP_TCB_UNLOCK(stcb); 1440 continue; 1441 } 1442 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1443 SCTP_TCB_UNLOCK(stcb); 1444 continue; 1445 } 1446 /* now look at the list of remote addresses */ 1447 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1448 #ifdef INVARIANTS 1449 if (net == (TAILQ_NEXT(net, sctp_next))) { 1450 panic("Corrupt net list"); 1451 } 1452 #endif 1453 if (net->ro._l_addr.sa.sa_family != 1454 remote->sa_family) { 1455 /* not the same family */ 1456 continue; 1457 } 1458 switch (remote->sa_family) { 1459 #ifdef INET 1460 case AF_INET: 1461 { 1462 struct sockaddr_in *sin, 1463 *rsin; 1464 1465 sin = (struct sockaddr_in *) 1466 &net->ro._l_addr; 1467 rsin = (struct sockaddr_in *)remote; 1468 if (sin->sin_addr.s_addr == 1469 rsin->sin_addr.s_addr) { 1470 /* found it */ 1471 if (netp != NULL) { 1472 *netp = net; 1473 } 1474 if (locked_tcb == NULL) { 1475 SCTP_INP_DECR_REF(inp); 1476 } else if (locked_tcb != stcb) { 1477 SCTP_TCB_LOCK(locked_tcb); 1478 } 1479 if (locked_tcb) { 1480 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1481 } 1482 SCTP_INP_WUNLOCK(inp); 1483 SCTP_INP_INFO_RUNLOCK(); 1484 return (stcb); 1485 } 1486 break; 1487 } 1488 #endif 1489 #ifdef INET6 1490 case AF_INET6: 1491 { 1492 struct sockaddr_in6 *sin6, 1493 *rsin6; 1494 1495 sin6 = (struct sockaddr_in6 *) 1496 &net->ro._l_addr; 1497 rsin6 = (struct sockaddr_in6 *)remote; 1498 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1499 rsin6)) { 1500 /* found it */ 1501 if (netp != NULL) { 1502 *netp = net; 1503 } 1504 if (locked_tcb == NULL) { 1505 SCTP_INP_DECR_REF(inp); 1506 } else if (locked_tcb != stcb) { 1507 SCTP_TCB_LOCK(locked_tcb); 1508 } 1509 if (locked_tcb) { 1510 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1511 } 1512 SCTP_INP_WUNLOCK(inp); 1513 SCTP_INP_INFO_RUNLOCK(); 1514 return (stcb); 1515 } 1516 break; 1517 } 1518 #endif 1519 default: 1520 /* TSNH */ 1521 break; 1522 } 1523 } 1524 SCTP_TCB_UNLOCK(stcb); 1525 } 1526 } 1527 null_return: 1528 /* clean up for returning null */ 1529 if (locked_tcb) { 1530 SCTP_TCB_LOCK(locked_tcb); 1531 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1532 } 1533 SCTP_INP_WUNLOCK(inp); 1534 SCTP_INP_INFO_RUNLOCK(); 1535 /* not found */ 1536 return (NULL); 1537 } 1538 1539 1540 /* 1541 * Find an association for a specific endpoint using the association id given 1542 * out in the COMM_UP notification 1543 */ 1544 struct sctp_tcb * 1545 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1546 { 1547 /* 1548 * Use my the assoc_id to find a endpoint 1549 */ 1550 struct sctpasochead *head; 1551 struct sctp_tcb *stcb; 1552 uint32_t id; 1553 1554 if (inp == NULL) { 1555 SCTP_PRINTF("TSNH ep_associd\n"); 1556 return (NULL); 1557 } 1558 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1559 SCTP_PRINTF("TSNH ep_associd0\n"); 1560 return (NULL); 1561 } 1562 id = (uint32_t)asoc_id; 1563 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1564 if (head == NULL) { 1565 /* invalid id TSNH */ 1566 SCTP_PRINTF("TSNH ep_associd1\n"); 1567 return (NULL); 1568 } 1569 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1570 if (stcb->asoc.assoc_id == id) { 1571 if (inp != stcb->sctp_ep) { 1572 /* 1573 * some other guy has the same id active (id 1574 * collision ??). 1575 */ 1576 SCTP_PRINTF("TSNH ep_associd2\n"); 1577 continue; 1578 } 1579 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1580 continue; 1581 } 1582 if (want_lock) { 1583 SCTP_TCB_LOCK(stcb); 1584 } 1585 return (stcb); 1586 } 1587 } 1588 return (NULL); 1589 } 1590 1591 1592 struct sctp_tcb * 1593 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1594 { 1595 struct sctp_tcb *stcb; 1596 1597 SCTP_INP_RLOCK(inp); 1598 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1599 SCTP_INP_RUNLOCK(inp); 1600 return (stcb); 1601 } 1602 1603 1604 /* 1605 * Endpoint probe expects that the INP_INFO is locked. 1606 */ 1607 static struct sctp_inpcb * 1608 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1609 uint16_t lport, uint32_t vrf_id) 1610 { 1611 struct sctp_inpcb *inp; 1612 struct sctp_laddr *laddr; 1613 #ifdef INET 1614 struct sockaddr_in *sin; 1615 #endif 1616 #ifdef INET6 1617 struct sockaddr_in6 *sin6; 1618 struct sockaddr_in6 *intf_addr6; 1619 #endif 1620 int fnd; 1621 1622 #ifdef INET 1623 sin = NULL; 1624 #endif 1625 #ifdef INET6 1626 sin6 = NULL; 1627 #endif 1628 switch (nam->sa_family) { 1629 #ifdef INET 1630 case AF_INET: 1631 sin = (struct sockaddr_in *)nam; 1632 break; 1633 #endif 1634 #ifdef INET6 1635 case AF_INET6: 1636 sin6 = (struct sockaddr_in6 *)nam; 1637 break; 1638 #endif 1639 default: 1640 /* unsupported family */ 1641 return (NULL); 1642 } 1643 1644 if (head == NULL) 1645 return (NULL); 1646 1647 LIST_FOREACH(inp, head, sctp_hash) { 1648 SCTP_INP_RLOCK(inp); 1649 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1650 SCTP_INP_RUNLOCK(inp); 1651 continue; 1652 } 1653 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1654 (inp->sctp_lport == lport)) { 1655 /* got it */ 1656 switch (nam->sa_family) { 1657 #ifdef INET 1658 case AF_INET: 1659 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1660 SCTP_IPV6_V6ONLY(inp)) { 1661 /* 1662 * IPv4 on a IPv6 socket with ONLY 1663 * IPv6 set 1664 */ 1665 SCTP_INP_RUNLOCK(inp); 1666 continue; 1667 } 1668 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1669 &sin->sin_addr) != 0) { 1670 SCTP_INP_RUNLOCK(inp); 1671 continue; 1672 } 1673 break; 1674 #endif 1675 #ifdef INET6 1676 case AF_INET6: 1677 /* 1678 * A V6 address and the endpoint is NOT 1679 * bound V6 1680 */ 1681 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1682 SCTP_INP_RUNLOCK(inp); 1683 continue; 1684 } 1685 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1686 &sin6->sin6_addr) != 0) { 1687 SCTP_INP_RUNLOCK(inp); 1688 continue; 1689 } 1690 break; 1691 #endif 1692 default: 1693 break; 1694 } 1695 /* does a VRF id match? */ 1696 fnd = 0; 1697 if (inp->def_vrf_id == vrf_id) 1698 fnd = 1; 1699 1700 SCTP_INP_RUNLOCK(inp); 1701 if (!fnd) 1702 continue; 1703 return (inp); 1704 } 1705 SCTP_INP_RUNLOCK(inp); 1706 } 1707 switch (nam->sa_family) { 1708 #ifdef INET 1709 case AF_INET: 1710 if (sin->sin_addr.s_addr == INADDR_ANY) { 1711 /* Can't hunt for one that has no address specified */ 1712 return (NULL); 1713 } 1714 break; 1715 #endif 1716 #ifdef INET6 1717 case AF_INET6: 1718 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1719 /* Can't hunt for one that has no address specified */ 1720 return (NULL); 1721 } 1722 break; 1723 #endif 1724 default: 1725 break; 1726 } 1727 /* 1728 * ok, not bound to all so see if we can find a EP bound to this 1729 * address. 1730 */ 1731 LIST_FOREACH(inp, head, sctp_hash) { 1732 SCTP_INP_RLOCK(inp); 1733 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1734 SCTP_INP_RUNLOCK(inp); 1735 continue; 1736 } 1737 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1738 SCTP_INP_RUNLOCK(inp); 1739 continue; 1740 } 1741 /* 1742 * Ok this could be a likely candidate, look at all of its 1743 * addresses 1744 */ 1745 if (inp->sctp_lport != lport) { 1746 SCTP_INP_RUNLOCK(inp); 1747 continue; 1748 } 1749 /* does a VRF id match? */ 1750 fnd = 0; 1751 if (inp->def_vrf_id == vrf_id) 1752 fnd = 1; 1753 1754 if (!fnd) { 1755 SCTP_INP_RUNLOCK(inp); 1756 continue; 1757 } 1758 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1759 if (laddr->ifa == NULL) { 1760 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1761 __func__); 1762 continue; 1763 } 1764 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1765 (void *)laddr->ifa); 1766 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1767 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1768 continue; 1769 } 1770 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1771 /* possible, see if it matches */ 1772 switch (nam->sa_family) { 1773 #ifdef INET 1774 case AF_INET: 1775 if (sin->sin_addr.s_addr == 1776 laddr->ifa->address.sin.sin_addr.s_addr) { 1777 SCTP_INP_RUNLOCK(inp); 1778 return (inp); 1779 } 1780 break; 1781 #endif 1782 #ifdef INET6 1783 case AF_INET6: 1784 intf_addr6 = &laddr->ifa->address.sin6; 1785 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1786 intf_addr6)) { 1787 SCTP_INP_RUNLOCK(inp); 1788 return (inp); 1789 } 1790 break; 1791 #endif 1792 } 1793 } 1794 } 1795 SCTP_INP_RUNLOCK(inp); 1796 } 1797 return (NULL); 1798 } 1799 1800 1801 static struct sctp_inpcb * 1802 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1803 { 1804 struct sctppcbhead *head; 1805 struct sctp_inpcb *t_inp; 1806 int fnd; 1807 1808 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1809 SCTP_BASE_INFO(hashmark))]; 1810 LIST_FOREACH(t_inp, head, sctp_hash) { 1811 if (t_inp->sctp_lport != lport) { 1812 continue; 1813 } 1814 /* is it in the VRF in question */ 1815 fnd = 0; 1816 if (t_inp->def_vrf_id == vrf_id) 1817 fnd = 1; 1818 if (!fnd) 1819 continue; 1820 1821 /* This one is in use. */ 1822 /* check the v6/v4 binding issue */ 1823 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1824 SCTP_IPV6_V6ONLY(t_inp)) { 1825 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1826 /* collision in V6 space */ 1827 return (t_inp); 1828 } else { 1829 /* inp is BOUND_V4 no conflict */ 1830 continue; 1831 } 1832 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1833 /* t_inp is bound v4 and v6, conflict always */ 1834 return (t_inp); 1835 } else { 1836 /* t_inp is bound only V4 */ 1837 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1838 SCTP_IPV6_V6ONLY(inp)) { 1839 /* no conflict */ 1840 continue; 1841 } 1842 /* else fall through to conflict */ 1843 } 1844 return (t_inp); 1845 } 1846 return (NULL); 1847 } 1848 1849 1850 int 1851 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1852 { 1853 /* For 1-2-1 with port reuse */ 1854 struct sctppcbhead *head; 1855 struct sctp_inpcb *tinp, *ninp; 1856 1857 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1858 /* only works with port reuse on */ 1859 return (-1); 1860 } 1861 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1862 return (0); 1863 } 1864 SCTP_INP_RUNLOCK(inp); 1865 SCTP_INP_INFO_WLOCK(); 1866 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1867 SCTP_BASE_INFO(hashmark))]; 1868 /* Kick out all non-listeners to the TCP hash */ 1869 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1870 if (tinp->sctp_lport != inp->sctp_lport) { 1871 continue; 1872 } 1873 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1874 continue; 1875 } 1876 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1877 continue; 1878 } 1879 if (SCTP_IS_LISTENING(tinp)) { 1880 continue; 1881 } 1882 SCTP_INP_WLOCK(tinp); 1883 LIST_REMOVE(tinp, sctp_hash); 1884 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1885 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1886 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1887 SCTP_INP_WUNLOCK(tinp); 1888 } 1889 SCTP_INP_WLOCK(inp); 1890 /* Pull from where he was */ 1891 LIST_REMOVE(inp, sctp_hash); 1892 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1893 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1894 LIST_INSERT_HEAD(head, inp, sctp_hash); 1895 SCTP_INP_WUNLOCK(inp); 1896 SCTP_INP_RLOCK(inp); 1897 SCTP_INP_INFO_WUNLOCK(); 1898 return (0); 1899 } 1900 1901 1902 struct sctp_inpcb * 1903 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1904 uint32_t vrf_id) 1905 { 1906 /* 1907 * First we check the hash table to see if someone has this port 1908 * bound with just the port. 1909 */ 1910 struct sctp_inpcb *inp; 1911 struct sctppcbhead *head; 1912 int lport; 1913 unsigned int i; 1914 #ifdef INET 1915 struct sockaddr_in *sin; 1916 #endif 1917 #ifdef INET6 1918 struct sockaddr_in6 *sin6; 1919 #endif 1920 1921 switch (nam->sa_family) { 1922 #ifdef INET 1923 case AF_INET: 1924 sin = (struct sockaddr_in *)nam; 1925 lport = sin->sin_port; 1926 break; 1927 #endif 1928 #ifdef INET6 1929 case AF_INET6: 1930 sin6 = (struct sockaddr_in6 *)nam; 1931 lport = sin6->sin6_port; 1932 break; 1933 #endif 1934 default: 1935 return (NULL); 1936 } 1937 /* 1938 * I could cheat here and just cast to one of the types but we will 1939 * do it right. It also provides the check against an Unsupported 1940 * type too. 1941 */ 1942 /* Find the head of the ALLADDR chain */ 1943 if (have_lock == 0) { 1944 SCTP_INP_INFO_RLOCK(); 1945 } 1946 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1947 SCTP_BASE_INFO(hashmark))]; 1948 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1949 1950 /* 1951 * If the TCP model exists it could be that the main listening 1952 * endpoint is gone but there still exists a connected socket for 1953 * this guy. If so we can return the first one that we find. This 1954 * may NOT be the correct one so the caller should be wary on the 1955 * returned INP. Currently the only caller that sets find_tcp_pool 1956 * is in bindx where we are verifying that a user CAN bind the 1957 * address. He either has bound it already, or someone else has, or 1958 * its open to bind, so this is good enough. 1959 */ 1960 if (inp == NULL && find_tcp_pool) { 1961 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1962 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1963 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1964 if (inp) { 1965 break; 1966 } 1967 } 1968 } 1969 if (inp) { 1970 SCTP_INP_INCR_REF(inp); 1971 } 1972 if (have_lock == 0) { 1973 SCTP_INP_INFO_RUNLOCK(); 1974 } 1975 return (inp); 1976 } 1977 1978 1979 /* 1980 * Find an association for an endpoint with the pointer to whom you want to 1981 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1982 * need to change the *to to some other struct like a mbuf... 1983 */ 1984 struct sctp_tcb * 1985 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1986 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1987 uint32_t vrf_id) 1988 { 1989 struct sctp_inpcb *inp = NULL; 1990 struct sctp_tcb *stcb; 1991 1992 SCTP_INP_INFO_RLOCK(); 1993 if (find_tcp_pool) { 1994 if (inp_p != NULL) { 1995 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1996 vrf_id); 1997 } else { 1998 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1999 vrf_id); 2000 } 2001 if (stcb != NULL) { 2002 SCTP_INP_INFO_RUNLOCK(); 2003 return (stcb); 2004 } 2005 } 2006 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2007 if (inp_p != NULL) { 2008 *inp_p = inp; 2009 } 2010 SCTP_INP_INFO_RUNLOCK(); 2011 if (inp == NULL) { 2012 return (NULL); 2013 } 2014 /* 2015 * ok, we have an endpoint, now lets find the assoc for it (if any) 2016 * we now place the source address or from in the to of the find 2017 * endpoint call. Since in reality this chain is used from the 2018 * inbound packet side. 2019 */ 2020 if (inp_p != NULL) { 2021 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2022 NULL); 2023 } else { 2024 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2025 NULL); 2026 } 2027 return (stcb); 2028 } 2029 2030 2031 /* 2032 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2033 * find all addresses that the sender has specified in any address list. Each 2034 * address will be used to lookup the TCB and see if one exits. 2035 */ 2036 static struct sctp_tcb * 2037 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2038 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2039 struct sockaddr *dst) 2040 { 2041 struct sctp_paramhdr *phdr, param_buf; 2042 #if defined(INET) || defined(INET6) 2043 struct sctp_tcb *stcb; 2044 uint16_t ptype; 2045 #endif 2046 uint16_t plen; 2047 #ifdef INET 2048 struct sockaddr_in sin4; 2049 #endif 2050 #ifdef INET6 2051 struct sockaddr_in6 sin6; 2052 #endif 2053 2054 #ifdef INET 2055 memset(&sin4, 0, sizeof(sin4)); 2056 sin4.sin_len = sizeof(sin4); 2057 sin4.sin_family = AF_INET; 2058 sin4.sin_port = sh->src_port; 2059 #endif 2060 #ifdef INET6 2061 memset(&sin6, 0, sizeof(sin6)); 2062 sin6.sin6_len = sizeof(sin6); 2063 sin6.sin6_family = AF_INET6; 2064 sin6.sin6_port = sh->src_port; 2065 #endif 2066 2067 offset += sizeof(struct sctp_init_chunk); 2068 2069 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2070 while (phdr != NULL) { 2071 /* now we must see if we want the parameter */ 2072 #if defined(INET) || defined(INET6) 2073 ptype = ntohs(phdr->param_type); 2074 #endif 2075 plen = ntohs(phdr->param_length); 2076 if (plen == 0) { 2077 break; 2078 } 2079 #ifdef INET 2080 if (ptype == SCTP_IPV4_ADDRESS && 2081 plen == sizeof(struct sctp_ipv4addr_param)) { 2082 /* Get the rest of the address */ 2083 struct sctp_ipv4addr_param ip4_param, *p4; 2084 2085 phdr = sctp_get_next_param(m, offset, 2086 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2087 if (phdr == NULL) { 2088 return (NULL); 2089 } 2090 p4 = (struct sctp_ipv4addr_param *)phdr; 2091 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2092 /* look it up */ 2093 stcb = sctp_findassociation_ep_addr(inp_p, 2094 (struct sockaddr *)&sin4, netp, dst, NULL); 2095 if (stcb != NULL) { 2096 return (stcb); 2097 } 2098 } 2099 #endif 2100 #ifdef INET6 2101 if (ptype == SCTP_IPV6_ADDRESS && 2102 plen == sizeof(struct sctp_ipv6addr_param)) { 2103 /* Get the rest of the address */ 2104 struct sctp_ipv6addr_param ip6_param, *p6; 2105 2106 phdr = sctp_get_next_param(m, offset, 2107 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2108 if (phdr == NULL) { 2109 return (NULL); 2110 } 2111 p6 = (struct sctp_ipv6addr_param *)phdr; 2112 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2113 /* look it up */ 2114 stcb = sctp_findassociation_ep_addr(inp_p, 2115 (struct sockaddr *)&sin6, netp, dst, NULL); 2116 if (stcb != NULL) { 2117 return (stcb); 2118 } 2119 } 2120 #endif 2121 offset += SCTP_SIZE32(plen); 2122 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2123 sizeof(param_buf)); 2124 } 2125 return (NULL); 2126 } 2127 2128 static struct sctp_tcb * 2129 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2130 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2131 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2132 { 2133 /* 2134 * Use my vtag to hash. If we find it we then verify the source addr 2135 * is in the assoc. If all goes well we save a bit on rec of a 2136 * packet. 2137 */ 2138 struct sctpasochead *head; 2139 struct sctp_nets *net; 2140 struct sctp_tcb *stcb; 2141 2142 SCTP_INP_INFO_RLOCK(); 2143 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2144 SCTP_BASE_INFO(hashasocmark))]; 2145 LIST_FOREACH(stcb, head, sctp_asocs) { 2146 SCTP_INP_RLOCK(stcb->sctp_ep); 2147 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2148 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2149 continue; 2150 } 2151 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2152 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2153 continue; 2154 } 2155 SCTP_TCB_LOCK(stcb); 2156 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2157 if (stcb->asoc.my_vtag == vtag) { 2158 /* candidate */ 2159 if (stcb->rport != rport) { 2160 SCTP_TCB_UNLOCK(stcb); 2161 continue; 2162 } 2163 if (stcb->sctp_ep->sctp_lport != lport) { 2164 SCTP_TCB_UNLOCK(stcb); 2165 continue; 2166 } 2167 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2168 SCTP_TCB_UNLOCK(stcb); 2169 continue; 2170 } 2171 /* RRS:Need toaddr check here */ 2172 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2173 /* Endpoint does not own this address */ 2174 SCTP_TCB_UNLOCK(stcb); 2175 continue; 2176 } 2177 if (remote_tag) { 2178 /* 2179 * If we have both vtags that's all we match 2180 * on 2181 */ 2182 if (stcb->asoc.peer_vtag == remote_tag) { 2183 /* 2184 * If both tags match we consider it 2185 * conclusive and check NO 2186 * source/destination addresses 2187 */ 2188 goto conclusive; 2189 } 2190 } 2191 if (skip_src_check) { 2192 conclusive: 2193 if (from) { 2194 *netp = sctp_findnet(stcb, from); 2195 } else { 2196 *netp = NULL; /* unknown */ 2197 } 2198 if (inp_p) 2199 *inp_p = stcb->sctp_ep; 2200 SCTP_INP_INFO_RUNLOCK(); 2201 return (stcb); 2202 } 2203 net = sctp_findnet(stcb, from); 2204 if (net) { 2205 /* yep its him. */ 2206 *netp = net; 2207 SCTP_STAT_INCR(sctps_vtagexpress); 2208 *inp_p = stcb->sctp_ep; 2209 SCTP_INP_INFO_RUNLOCK(); 2210 return (stcb); 2211 } else { 2212 /* 2213 * not him, this should only happen in rare 2214 * cases so I peg it. 2215 */ 2216 SCTP_STAT_INCR(sctps_vtagbogus); 2217 } 2218 } 2219 SCTP_TCB_UNLOCK(stcb); 2220 } 2221 SCTP_INP_INFO_RUNLOCK(); 2222 return (NULL); 2223 } 2224 2225 2226 /* 2227 * Find an association with the pointer to the inbound IP packet. This can be 2228 * a IPv4 or IPv6 packet. 2229 */ 2230 struct sctp_tcb * 2231 sctp_findassociation_addr(struct mbuf *m, int offset, 2232 struct sockaddr *src, struct sockaddr *dst, 2233 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2234 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2235 { 2236 struct sctp_tcb *stcb; 2237 struct sctp_inpcb *inp; 2238 2239 if (sh->v_tag) { 2240 /* we only go down this path if vtag is non-zero */ 2241 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2242 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2243 if (stcb) { 2244 return (stcb); 2245 } 2246 } 2247 2248 if (inp_p) { 2249 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2250 1, vrf_id); 2251 inp = *inp_p; 2252 } else { 2253 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2254 1, vrf_id); 2255 } 2256 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2257 if (stcb == NULL && inp) { 2258 /* Found a EP but not this address */ 2259 if ((ch->chunk_type == SCTP_INITIATION) || 2260 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2261 /*- 2262 * special hook, we do NOT return linp or an 2263 * association that is linked to an existing 2264 * association that is under the TCP pool (i.e. no 2265 * listener exists). The endpoint finding routine 2266 * will always find a listener before examining the 2267 * TCP pool. 2268 */ 2269 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2270 if (inp_p) { 2271 *inp_p = NULL; 2272 } 2273 return (NULL); 2274 } 2275 stcb = sctp_findassociation_special_addr(m, 2276 offset, sh, &inp, netp, dst); 2277 if (inp_p != NULL) { 2278 *inp_p = inp; 2279 } 2280 } 2281 } 2282 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2283 return (stcb); 2284 } 2285 2286 /* 2287 * lookup an association by an ASCONF lookup address. 2288 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2289 */ 2290 struct sctp_tcb * 2291 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2292 struct sockaddr *dst, struct sctphdr *sh, 2293 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2294 { 2295 struct sctp_tcb *stcb; 2296 union sctp_sockstore remote_store; 2297 struct sctp_paramhdr param_buf, *phdr; 2298 int ptype; 2299 int zero_address = 0; 2300 #ifdef INET 2301 struct sockaddr_in *sin; 2302 #endif 2303 #ifdef INET6 2304 struct sockaddr_in6 *sin6; 2305 #endif 2306 2307 memset(&remote_store, 0, sizeof(remote_store)); 2308 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2309 ¶m_buf, sizeof(struct sctp_paramhdr)); 2310 if (phdr == NULL) { 2311 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2312 __func__); 2313 return NULL; 2314 } 2315 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2316 /* get the correlation address */ 2317 switch (ptype) { 2318 #ifdef INET6 2319 case SCTP_IPV6_ADDRESS: 2320 { 2321 /* ipv6 address param */ 2322 struct sctp_ipv6addr_param *p6, p6_buf; 2323 2324 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2325 return NULL; 2326 } 2327 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2328 offset + sizeof(struct sctp_asconf_chunk), 2329 &p6_buf.ph, sizeof(p6_buf)); 2330 if (p6 == NULL) { 2331 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2332 __func__); 2333 return (NULL); 2334 } 2335 sin6 = &remote_store.sin6; 2336 sin6->sin6_family = AF_INET6; 2337 sin6->sin6_len = sizeof(*sin6); 2338 sin6->sin6_port = sh->src_port; 2339 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2340 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2341 zero_address = 1; 2342 break; 2343 } 2344 #endif 2345 #ifdef INET 2346 case SCTP_IPV4_ADDRESS: 2347 { 2348 /* ipv4 address param */ 2349 struct sctp_ipv4addr_param *p4, p4_buf; 2350 2351 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2352 return NULL; 2353 } 2354 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2355 offset + sizeof(struct sctp_asconf_chunk), 2356 &p4_buf.ph, sizeof(p4_buf)); 2357 if (p4 == NULL) { 2358 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2359 __func__); 2360 return (NULL); 2361 } 2362 sin = &remote_store.sin; 2363 sin->sin_family = AF_INET; 2364 sin->sin_len = sizeof(*sin); 2365 sin->sin_port = sh->src_port; 2366 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2367 if (sin->sin_addr.s_addr == INADDR_ANY) 2368 zero_address = 1; 2369 break; 2370 } 2371 #endif 2372 default: 2373 /* invalid address param type */ 2374 return NULL; 2375 } 2376 2377 if (zero_address) { 2378 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2379 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2380 if (stcb != NULL) { 2381 SCTP_INP_DECR_REF(*inp_p); 2382 } 2383 } else { 2384 stcb = sctp_findassociation_ep_addr(inp_p, 2385 &remote_store.sa, netp, 2386 dst, NULL); 2387 } 2388 return (stcb); 2389 } 2390 2391 2392 /* 2393 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2394 * addresses. This way if we don't get a bind we by default pick a ephemeral 2395 * port with all addresses bound. 2396 */ 2397 int 2398 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2399 { 2400 /* 2401 * we get called when a new endpoint starts up. We need to allocate 2402 * the sctp_inpcb structure from the zone and init it. Mark it as 2403 * unbound and find a port that we can use as an ephemeral with 2404 * INADDR_ANY. If the user binds later no problem we can then add in 2405 * the specific addresses. And setup the default parameters for the 2406 * EP. 2407 */ 2408 int i, error; 2409 struct sctp_inpcb *inp; 2410 struct sctp_pcb *m; 2411 struct timeval time; 2412 sctp_sharedkey_t *null_key; 2413 2414 error = 0; 2415 2416 SCTP_INP_INFO_WLOCK(); 2417 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2418 if (inp == NULL) { 2419 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2420 SCTP_INP_INFO_WUNLOCK(); 2421 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2422 return (ENOBUFS); 2423 } 2424 /* zap it */ 2425 memset(inp, 0, sizeof(*inp)); 2426 2427 /* bump generations */ 2428 /* setup socket pointers */ 2429 inp->sctp_socket = so; 2430 inp->ip_inp.inp.inp_socket = so; 2431 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2432 #ifdef INET6 2433 if (INP_SOCKAF(so) == AF_INET6) { 2434 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2435 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2436 } 2437 if (MODULE_GLOBAL(ip6_v6only)) { 2438 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2439 } 2440 } 2441 #endif 2442 inp->sctp_associd_counter = 1; 2443 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2444 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2445 inp->max_cwnd = 0; 2446 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2447 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2448 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2449 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2450 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2451 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2452 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2453 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2454 inp->idata_supported = 0; 2455 2456 inp->fibnum = so->so_fibnum; 2457 /* init the small hash table we use to track asocid <-> tcb */ 2458 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2459 if (inp->sctp_asocidhash == NULL) { 2460 crfree(inp->ip_inp.inp.inp_cred); 2461 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2462 SCTP_INP_INFO_WUNLOCK(); 2463 return (ENOBUFS); 2464 } 2465 SCTP_INCR_EP_COUNT(); 2466 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2467 SCTP_INP_INFO_WUNLOCK(); 2468 2469 so->so_pcb = (caddr_t)inp; 2470 2471 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2472 /* UDP style socket */ 2473 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2474 SCTP_PCB_FLAGS_UNBOUND); 2475 /* Be sure it is NON-BLOCKING IO for UDP */ 2476 /* SCTP_SET_SO_NBIO(so); */ 2477 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2478 /* TCP style socket */ 2479 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2480 SCTP_PCB_FLAGS_UNBOUND); 2481 /* Be sure we have blocking IO by default */ 2482 SOCK_LOCK(so); 2483 SCTP_CLEAR_SO_NBIO(so); 2484 SOCK_UNLOCK(so); 2485 } else { 2486 /* 2487 * unsupported socket type (RAW, etc)- in case we missed it 2488 * in protosw 2489 */ 2490 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2491 so->so_pcb = NULL; 2492 crfree(inp->ip_inp.inp.inp_cred); 2493 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2494 return (EOPNOTSUPP); 2495 } 2496 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2497 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2498 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2499 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2500 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2501 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2502 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2503 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2504 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2505 } 2506 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2507 &inp->sctp_hashmark); 2508 if (inp->sctp_tcbhash == NULL) { 2509 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2510 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2511 so->so_pcb = NULL; 2512 crfree(inp->ip_inp.inp.inp_cred); 2513 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2514 return (ENOBUFS); 2515 } 2516 inp->def_vrf_id = vrf_id; 2517 2518 SCTP_INP_INFO_WLOCK(); 2519 SCTP_INP_LOCK_INIT(inp); 2520 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2521 SCTP_INP_READ_INIT(inp); 2522 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2523 /* lock the new ep */ 2524 SCTP_INP_WLOCK(inp); 2525 2526 /* add it to the info area */ 2527 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2528 SCTP_INP_INFO_WUNLOCK(); 2529 2530 TAILQ_INIT(&inp->read_queue); 2531 LIST_INIT(&inp->sctp_addr_list); 2532 2533 LIST_INIT(&inp->sctp_asoc_list); 2534 2535 #ifdef SCTP_TRACK_FREED_ASOCS 2536 /* TEMP CODE */ 2537 LIST_INIT(&inp->sctp_asoc_free_list); 2538 #endif 2539 /* Init the timer structure for signature change */ 2540 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2541 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2542 2543 /* now init the actual endpoint default data */ 2544 m = &inp->sctp_ep; 2545 2546 /* setup the base timeout information */ 2547 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2548 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2549 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2550 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2551 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2552 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2553 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2554 /* all max/min max are in ms */ 2555 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2556 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2557 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2558 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2559 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2560 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2561 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2562 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2563 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2564 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2565 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2566 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2567 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2568 2569 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2570 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2571 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2572 /* number of streams to pre-open on a association */ 2573 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2574 2575 m->default_mtu = 0; 2576 /* Add adaptation cookie */ 2577 m->adaptation_layer_indicator = 0; 2578 m->adaptation_layer_indicator_provided = 0; 2579 2580 /* seed random number generator */ 2581 m->random_counter = 1; 2582 m->store_at = SCTP_SIGNATURE_SIZE; 2583 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2584 sctp_fill_random_store(m); 2585 2586 /* Minimum cookie size */ 2587 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2588 sizeof(struct sctp_state_cookie); 2589 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2590 2591 /* Setup the initial secret */ 2592 (void)SCTP_GETTIME_TIMEVAL(&time); 2593 m->time_of_secret_change = time.tv_sec; 2594 2595 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2596 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2597 } 2598 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2599 2600 /* How long is a cookie good for ? */ 2601 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2602 /* 2603 * Initialize authentication parameters 2604 */ 2605 m->local_hmacs = sctp_default_supported_hmaclist(); 2606 m->local_auth_chunks = sctp_alloc_chunklist(); 2607 if (inp->asconf_supported) { 2608 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2609 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2610 } 2611 m->default_dscp = 0; 2612 #ifdef INET6 2613 m->default_flowlabel = 0; 2614 #endif 2615 m->port = 0; /* encapsulation disabled by default */ 2616 LIST_INIT(&m->shared_keys); 2617 /* add default NULL key as key id 0 */ 2618 null_key = sctp_alloc_sharedkey(); 2619 sctp_insert_sharedkey(&m->shared_keys, null_key); 2620 SCTP_INP_WUNLOCK(inp); 2621 #ifdef SCTP_LOG_CLOSING 2622 sctp_log_closing(inp, NULL, 12); 2623 #endif 2624 return (error); 2625 } 2626 2627 2628 void 2629 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2630 struct sctp_tcb *stcb) 2631 { 2632 struct sctp_nets *net; 2633 uint16_t lport, rport; 2634 struct sctppcbhead *head; 2635 struct sctp_laddr *laddr, *oladdr; 2636 2637 atomic_add_int(&stcb->asoc.refcnt, 1); 2638 SCTP_TCB_UNLOCK(stcb); 2639 SCTP_INP_INFO_WLOCK(); 2640 SCTP_INP_WLOCK(old_inp); 2641 SCTP_INP_WLOCK(new_inp); 2642 SCTP_TCB_LOCK(stcb); 2643 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2644 2645 new_inp->sctp_ep.time_of_secret_change = 2646 old_inp->sctp_ep.time_of_secret_change; 2647 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2648 sizeof(old_inp->sctp_ep.secret_key)); 2649 new_inp->sctp_ep.current_secret_number = 2650 old_inp->sctp_ep.current_secret_number; 2651 new_inp->sctp_ep.last_secret_number = 2652 old_inp->sctp_ep.last_secret_number; 2653 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2654 2655 /* make it so new data pours into the new socket */ 2656 stcb->sctp_socket = new_inp->sctp_socket; 2657 stcb->sctp_ep = new_inp; 2658 2659 /* Copy the port across */ 2660 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2661 rport = stcb->rport; 2662 /* Pull the tcb from the old association */ 2663 LIST_REMOVE(stcb, sctp_tcbhash); 2664 LIST_REMOVE(stcb, sctp_tcblist); 2665 if (stcb->asoc.in_asocid_hash) { 2666 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2667 } 2668 /* Now insert the new_inp into the TCP connected hash */ 2669 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2670 2671 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2672 /* Its safe to access */ 2673 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2674 2675 /* Now move the tcb into the endpoint list */ 2676 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2677 /* 2678 * Question, do we even need to worry about the ep-hash since we 2679 * only have one connection? Probably not :> so lets get rid of it 2680 * and not suck up any kernel memory in that. 2681 */ 2682 if (stcb->asoc.in_asocid_hash) { 2683 struct sctpasochead *lhd; 2684 2685 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2686 new_inp->hashasocidmark)]; 2687 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2688 } 2689 /* Ok. Let's restart timer. */ 2690 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2691 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2692 stcb, net); 2693 } 2694 2695 SCTP_INP_INFO_WUNLOCK(); 2696 if (new_inp->sctp_tcbhash != NULL) { 2697 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2698 new_inp->sctp_tcbhash = NULL; 2699 } 2700 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2701 /* Subset bound, so copy in the laddr list from the old_inp */ 2702 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2703 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2704 if (laddr == NULL) { 2705 /* 2706 * Gak, what can we do? This assoc is really 2707 * HOSED. We probably should send an abort 2708 * here. 2709 */ 2710 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2711 continue; 2712 } 2713 SCTP_INCR_LADDR_COUNT(); 2714 memset(laddr, 0, sizeof(*laddr)); 2715 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2716 laddr->ifa = oladdr->ifa; 2717 atomic_add_int(&laddr->ifa->refcount, 1); 2718 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2719 sctp_nxt_addr); 2720 new_inp->laddr_count++; 2721 if (oladdr == stcb->asoc.last_used_address) { 2722 stcb->asoc.last_used_address = laddr; 2723 } 2724 } 2725 } 2726 /* 2727 * Now any running timers need to be adjusted since we really don't 2728 * care if they are running or not just blast in the new_inp into 2729 * all of them. 2730 */ 2731 2732 stcb->asoc.dack_timer.ep = (void *)new_inp; 2733 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2734 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2735 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2736 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2737 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2738 /* now what about the nets? */ 2739 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2740 net->pmtu_timer.ep = (void *)new_inp; 2741 net->hb_timer.ep = (void *)new_inp; 2742 net->rxt_timer.ep = (void *)new_inp; 2743 } 2744 SCTP_INP_WUNLOCK(new_inp); 2745 SCTP_INP_WUNLOCK(old_inp); 2746 } 2747 2748 /* 2749 * insert an laddr entry with the given ifa for the desired list 2750 */ 2751 static int 2752 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2753 { 2754 struct sctp_laddr *laddr; 2755 2756 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2757 if (laddr == NULL) { 2758 /* out of memory? */ 2759 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2760 return (EINVAL); 2761 } 2762 SCTP_INCR_LADDR_COUNT(); 2763 memset(laddr, 0, sizeof(*laddr)); 2764 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2765 laddr->ifa = ifa; 2766 laddr->action = act; 2767 atomic_add_int(&ifa->refcount, 1); 2768 /* insert it */ 2769 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2770 2771 return (0); 2772 } 2773 2774 /* 2775 * Remove an laddr entry from the local address list (on an assoc) 2776 */ 2777 static void 2778 sctp_remove_laddr(struct sctp_laddr *laddr) 2779 { 2780 2781 /* remove from the list */ 2782 LIST_REMOVE(laddr, sctp_nxt_addr); 2783 sctp_free_ifa(laddr->ifa); 2784 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2785 SCTP_DECR_LADDR_COUNT(); 2786 } 2787 2788 2789 2790 /* sctp_ifap is used to bypass normal local address validation checks */ 2791 int 2792 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2793 struct sctp_ifa *sctp_ifap, struct thread *p) 2794 { 2795 /* bind a ep to a socket address */ 2796 struct sctppcbhead *head; 2797 struct sctp_inpcb *inp, *inp_tmp; 2798 struct inpcb *ip_inp; 2799 int port_reuse_active = 0; 2800 int bindall; 2801 uint16_t lport; 2802 int error; 2803 uint32_t vrf_id; 2804 2805 lport = 0; 2806 bindall = 1; 2807 inp = (struct sctp_inpcb *)so->so_pcb; 2808 ip_inp = (struct inpcb *)so->so_pcb; 2809 #ifdef SCTP_DEBUG 2810 if (addr) { 2811 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2812 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2813 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2814 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2815 } 2816 #endif 2817 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2818 /* already did a bind, subsequent binds NOT allowed ! */ 2819 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2820 return (EINVAL); 2821 } 2822 #ifdef INVARIANTS 2823 if (p == NULL) 2824 panic("null proc/thread"); 2825 #endif 2826 if (addr != NULL) { 2827 switch (addr->sa_family) { 2828 #ifdef INET 2829 case AF_INET: 2830 { 2831 struct sockaddr_in *sin; 2832 2833 /* IPV6_V6ONLY socket? */ 2834 if (SCTP_IPV6_V6ONLY(inp)) { 2835 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2836 return (EINVAL); 2837 } 2838 if (addr->sa_len != sizeof(*sin)) { 2839 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2840 return (EINVAL); 2841 } 2842 2843 sin = (struct sockaddr_in *)addr; 2844 lport = sin->sin_port; 2845 /* 2846 * For LOOPBACK the prison_local_ip4() call 2847 * will transmute the ip address to the 2848 * proper value. 2849 */ 2850 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2851 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2852 return (error); 2853 } 2854 if (sin->sin_addr.s_addr != INADDR_ANY) { 2855 bindall = 0; 2856 } 2857 break; 2858 } 2859 #endif 2860 #ifdef INET6 2861 case AF_INET6: 2862 { 2863 /* 2864 * Only for pure IPv6 Address. (No IPv4 2865 * Mapped!) 2866 */ 2867 struct sockaddr_in6 *sin6; 2868 2869 sin6 = (struct sockaddr_in6 *)addr; 2870 2871 if (addr->sa_len != sizeof(*sin6)) { 2872 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2873 return (EINVAL); 2874 } 2875 lport = sin6->sin6_port; 2876 /* 2877 * For LOOPBACK the prison_local_ip6() call 2878 * will transmute the ipv6 address to the 2879 * proper value. 2880 */ 2881 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2882 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2883 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2884 return (error); 2885 } 2886 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2887 bindall = 0; 2888 /* KAME hack: embed scopeid */ 2889 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2890 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2891 return (EINVAL); 2892 } 2893 } 2894 /* this must be cleared for ifa_ifwithaddr() */ 2895 sin6->sin6_scope_id = 0; 2896 break; 2897 } 2898 #endif 2899 default: 2900 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2901 return (EAFNOSUPPORT); 2902 } 2903 } 2904 SCTP_INP_INFO_WLOCK(); 2905 SCTP_INP_WLOCK(inp); 2906 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2907 vrf_id = inp->def_vrf_id; 2908 2909 /* increase our count due to the unlock we do */ 2910 SCTP_INP_INCR_REF(inp); 2911 if (lport) { 2912 /* 2913 * Did the caller specify a port? if so we must see if an ep 2914 * already has this one bound. 2915 */ 2916 /* got to be root to get at low ports */ 2917 if (ntohs(lport) < IPPORT_RESERVED) { 2918 if ((p != NULL) && ((error = 2919 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2920 ) != 0)) { 2921 SCTP_INP_DECR_REF(inp); 2922 SCTP_INP_WUNLOCK(inp); 2923 SCTP_INP_INFO_WUNLOCK(); 2924 return (error); 2925 } 2926 } 2927 SCTP_INP_WUNLOCK(inp); 2928 if (bindall) { 2929 vrf_id = inp->def_vrf_id; 2930 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2931 if (inp_tmp != NULL) { 2932 /* 2933 * lock guy returned and lower count note 2934 * that we are not bound so inp_tmp should 2935 * NEVER be inp. And it is this inp 2936 * (inp_tmp) that gets the reference bump, 2937 * so we must lower it. 2938 */ 2939 SCTP_INP_DECR_REF(inp_tmp); 2940 /* unlock info */ 2941 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2942 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2943 /* 2944 * Ok, must be one-2-one and 2945 * allowing port re-use 2946 */ 2947 port_reuse_active = 1; 2948 goto continue_anyway; 2949 } 2950 SCTP_INP_DECR_REF(inp); 2951 SCTP_INP_INFO_WUNLOCK(); 2952 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2953 return (EADDRINUSE); 2954 } 2955 } else { 2956 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2957 if (inp_tmp != NULL) { 2958 /* 2959 * lock guy returned and lower count note 2960 * that we are not bound so inp_tmp should 2961 * NEVER be inp. And it is this inp 2962 * (inp_tmp) that gets the reference bump, 2963 * so we must lower it. 2964 */ 2965 SCTP_INP_DECR_REF(inp_tmp); 2966 /* unlock info */ 2967 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2968 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2969 /* 2970 * Ok, must be one-2-one and 2971 * allowing port re-use 2972 */ 2973 port_reuse_active = 1; 2974 goto continue_anyway; 2975 } 2976 SCTP_INP_DECR_REF(inp); 2977 SCTP_INP_INFO_WUNLOCK(); 2978 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2979 return (EADDRINUSE); 2980 } 2981 } 2982 continue_anyway: 2983 SCTP_INP_WLOCK(inp); 2984 if (bindall) { 2985 /* verify that no lport is not used by a singleton */ 2986 if ((port_reuse_active == 0) && 2987 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2988 /* Sorry someone already has this one bound */ 2989 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2990 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2991 port_reuse_active = 1; 2992 } else { 2993 SCTP_INP_DECR_REF(inp); 2994 SCTP_INP_WUNLOCK(inp); 2995 SCTP_INP_INFO_WUNLOCK(); 2996 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2997 return (EADDRINUSE); 2998 } 2999 } 3000 } 3001 } else { 3002 uint16_t first, last, candidate; 3003 uint16_t count; 3004 int done; 3005 3006 if (ip_inp->inp_flags & INP_HIGHPORT) { 3007 first = MODULE_GLOBAL(ipport_hifirstauto); 3008 last = MODULE_GLOBAL(ipport_hilastauto); 3009 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3010 if (p && (error = 3011 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3012 )) { 3013 SCTP_INP_DECR_REF(inp); 3014 SCTP_INP_WUNLOCK(inp); 3015 SCTP_INP_INFO_WUNLOCK(); 3016 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3017 return (error); 3018 } 3019 first = MODULE_GLOBAL(ipport_lowfirstauto); 3020 last = MODULE_GLOBAL(ipport_lowlastauto); 3021 } else { 3022 first = MODULE_GLOBAL(ipport_firstauto); 3023 last = MODULE_GLOBAL(ipport_lastauto); 3024 } 3025 if (first > last) { 3026 uint16_t temp; 3027 3028 temp = first; 3029 first = last; 3030 last = temp; 3031 } 3032 count = last - first + 1; /* number of candidates */ 3033 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3034 3035 done = 0; 3036 while (!done) { 3037 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3038 done = 1; 3039 } 3040 if (!done) { 3041 if (--count == 0) { 3042 SCTP_INP_DECR_REF(inp); 3043 SCTP_INP_WUNLOCK(inp); 3044 SCTP_INP_INFO_WUNLOCK(); 3045 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3046 return (EADDRINUSE); 3047 } 3048 if (candidate == last) 3049 candidate = first; 3050 else 3051 candidate = candidate + 1; 3052 } 3053 } 3054 lport = htons(candidate); 3055 } 3056 SCTP_INP_DECR_REF(inp); 3057 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3058 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3059 /* 3060 * this really should not happen. The guy did a non-blocking 3061 * bind and then did a close at the same time. 3062 */ 3063 SCTP_INP_WUNLOCK(inp); 3064 SCTP_INP_INFO_WUNLOCK(); 3065 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3066 return (EINVAL); 3067 } 3068 /* ok we look clear to give out this port, so lets setup the binding */ 3069 if (bindall) { 3070 /* binding to all addresses, so just set in the proper flags */ 3071 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3072 /* set the automatic addr changes from kernel flag */ 3073 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3074 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3075 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3076 } else { 3077 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3078 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3079 } 3080 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3081 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3082 } else { 3083 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3084 } 3085 /* 3086 * set the automatic mobility_base from kernel flag (by 3087 * micchie) 3088 */ 3089 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3090 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3091 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3092 } else { 3093 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3094 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3095 } 3096 /* 3097 * set the automatic mobility_fasthandoff from kernel flag 3098 * (by micchie) 3099 */ 3100 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3101 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3102 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3103 } else { 3104 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3106 } 3107 } else { 3108 /* 3109 * bind specific, make sure flags is off and add a new 3110 * address structure to the sctp_addr_list inside the ep 3111 * structure. 3112 * 3113 * We will need to allocate one and insert it at the head. 3114 * The socketopt call can just insert new addresses in there 3115 * as well. It will also have to do the embed scope kame 3116 * hack too (before adding). 3117 */ 3118 struct sctp_ifa *ifa; 3119 union sctp_sockstore store; 3120 3121 memset(&store, 0, sizeof(store)); 3122 switch (addr->sa_family) { 3123 #ifdef INET 3124 case AF_INET: 3125 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3126 store.sin.sin_port = 0; 3127 break; 3128 #endif 3129 #ifdef INET6 3130 case AF_INET6: 3131 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3132 store.sin6.sin6_port = 0; 3133 break; 3134 #endif 3135 default: 3136 break; 3137 } 3138 /* 3139 * first find the interface with the bound address need to 3140 * zero out the port to find the address! yuck! can't do 3141 * this earlier since need port for sctp_pcb_findep() 3142 */ 3143 if (sctp_ifap != NULL) { 3144 ifa = sctp_ifap; 3145 } else { 3146 /* 3147 * Note for BSD we hit here always other O/S's will 3148 * pass things in via the sctp_ifap argument. 3149 */ 3150 ifa = sctp_find_ifa_by_addr(&store.sa, 3151 vrf_id, SCTP_ADDR_NOT_LOCKED); 3152 } 3153 if (ifa == NULL) { 3154 /* Can't find an interface with that address */ 3155 SCTP_INP_WUNLOCK(inp); 3156 SCTP_INP_INFO_WUNLOCK(); 3157 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3158 return (EADDRNOTAVAIL); 3159 } 3160 #ifdef INET6 3161 if (addr->sa_family == AF_INET6) { 3162 /* GAK, more FIXME IFA lock? */ 3163 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3164 /* Can't bind a non-existent addr. */ 3165 SCTP_INP_WUNLOCK(inp); 3166 SCTP_INP_INFO_WUNLOCK(); 3167 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3168 return (EINVAL); 3169 } 3170 } 3171 #endif 3172 /* we're not bound all */ 3173 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3174 /* allow bindx() to send ASCONF's for binding changes */ 3175 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3176 /* clear automatic addr changes from kernel flag */ 3177 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3178 3179 /* add this address to the endpoint list */ 3180 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3181 if (error != 0) { 3182 SCTP_INP_WUNLOCK(inp); 3183 SCTP_INP_INFO_WUNLOCK(); 3184 return (error); 3185 } 3186 inp->laddr_count++; 3187 } 3188 /* find the bucket */ 3189 if (port_reuse_active) { 3190 /* Put it into tcp 1-2-1 hash */ 3191 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3192 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3193 } else { 3194 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3195 } 3196 /* put it in the bucket */ 3197 LIST_INSERT_HEAD(head, inp, sctp_hash); 3198 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3199 (void *)head, ntohs(lport), port_reuse_active); 3200 /* set in the port */ 3201 inp->sctp_lport = lport; 3202 3203 /* turn off just the unbound flag */ 3204 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3205 SCTP_INP_WUNLOCK(inp); 3206 SCTP_INP_INFO_WUNLOCK(); 3207 return (0); 3208 } 3209 3210 3211 static void 3212 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3213 { 3214 struct sctp_iterator *it, *nit; 3215 3216 /* 3217 * We enter with the only the ITERATOR_LOCK in place and a write 3218 * lock on the inp_info stuff. 3219 */ 3220 it = sctp_it_ctl.cur_it; 3221 if (it && (it->vn != curvnet)) { 3222 /* Its not looking at our VNET */ 3223 return; 3224 } 3225 if (it && (it->inp == inp)) { 3226 /* 3227 * This is tricky and we hold the iterator lock, but when it 3228 * returns and gets the lock (when we release it) the 3229 * iterator will try to operate on inp. We need to stop that 3230 * from happening. But of course the iterator has a 3231 * reference on the stcb and inp. We can mark it and it will 3232 * stop. 3233 * 3234 * If its a single iterator situation, we set the end 3235 * iterator flag. Otherwise we set the iterator to go to the 3236 * next inp. 3237 * 3238 */ 3239 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3240 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3241 } else { 3242 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3243 } 3244 } 3245 /* 3246 * Now go through and remove any single reference to our inp that 3247 * may be still pending on the list 3248 */ 3249 SCTP_IPI_ITERATOR_WQ_LOCK(); 3250 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3251 if (it->vn != curvnet) { 3252 continue; 3253 } 3254 if (it->inp == inp) { 3255 /* This one points to me is it inp specific? */ 3256 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3257 /* Remove and free this one */ 3258 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3259 it, sctp_nxt_itr); 3260 if (it->function_atend != NULL) { 3261 (*it->function_atend) (it->pointer, it->val); 3262 } 3263 SCTP_FREE(it, SCTP_M_ITER); 3264 } else { 3265 it->inp = LIST_NEXT(it->inp, sctp_list); 3266 if (it->inp) { 3267 SCTP_INP_INCR_REF(it->inp); 3268 } 3269 } 3270 /* 3271 * When its put in the refcnt is incremented so decr 3272 * it 3273 */ 3274 SCTP_INP_DECR_REF(inp); 3275 } 3276 } 3277 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3278 } 3279 3280 /* release sctp_inpcb unbind the port */ 3281 void 3282 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3283 { 3284 /* 3285 * Here we free a endpoint. We must find it (if it is in the Hash 3286 * table) and remove it from there. Then we must also find it in the 3287 * overall list and remove it from there. After all removals are 3288 * complete then any timer has to be stopped. Then start the actual 3289 * freeing. a) Any local lists. b) Any associations. c) The hash of 3290 * all associations. d) finally the ep itself. 3291 */ 3292 struct sctp_tcb *asoc, *nasoc; 3293 struct sctp_laddr *laddr, *nladdr; 3294 struct inpcb *ip_pcb; 3295 struct socket *so; 3296 int being_refed = 0; 3297 struct sctp_queued_to_read *sq, *nsq; 3298 int cnt; 3299 sctp_sharedkey_t *shared_key, *nshared_key; 3300 3301 3302 #ifdef SCTP_LOG_CLOSING 3303 sctp_log_closing(inp, NULL, 0); 3304 #endif 3305 SCTP_ITERATOR_LOCK(); 3306 /* mark any iterators on the list or being processed */ 3307 sctp_iterator_inp_being_freed(inp); 3308 SCTP_ITERATOR_UNLOCK(); 3309 so = inp->sctp_socket; 3310 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3311 /* been here before.. eeks.. get out of here */ 3312 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3313 #ifdef SCTP_LOG_CLOSING 3314 sctp_log_closing(inp, NULL, 1); 3315 #endif 3316 return; 3317 } 3318 SCTP_ASOC_CREATE_LOCK(inp); 3319 SCTP_INP_INFO_WLOCK(); 3320 3321 SCTP_INP_WLOCK(inp); 3322 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3323 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3324 /* socket is gone, so no more wakeups allowed */ 3325 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3326 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3327 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3328 3329 } 3330 /* First time through we have the socket lock, after that no more. */ 3331 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3332 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3333 3334 if (inp->control) { 3335 sctp_m_freem(inp->control); 3336 inp->control = NULL; 3337 } 3338 if (inp->pkt) { 3339 sctp_m_freem(inp->pkt); 3340 inp->pkt = NULL; 3341 } 3342 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3343 * here but I will be nice :> (i.e. 3344 * ip_pcb = ep;) */ 3345 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3346 int cnt_in_sd; 3347 3348 cnt_in_sd = 0; 3349 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3350 SCTP_TCB_LOCK(asoc); 3351 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3352 /* Skip guys being freed */ 3353 cnt_in_sd++; 3354 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3355 /* 3356 * Special case - we did not start a 3357 * kill timer on the asoc due to it 3358 * was not closed. So go ahead and 3359 * start it now. 3360 */ 3361 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3362 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3363 } 3364 SCTP_TCB_UNLOCK(asoc); 3365 continue; 3366 } 3367 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3368 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3369 (asoc->asoc.total_output_queue_size == 0)) { 3370 /* 3371 * If we have data in queue, we don't want 3372 * to just free since the app may have done, 3373 * send()/close or connect/send/close. And 3374 * it wants the data to get across first. 3375 */ 3376 /* Just abandon things in the front states */ 3377 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3378 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3379 cnt_in_sd++; 3380 } 3381 continue; 3382 } 3383 /* Disconnect the socket please */ 3384 asoc->sctp_socket = NULL; 3385 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3386 if ((asoc->asoc.size_on_reasm_queue > 0) || 3387 (asoc->asoc.control_pdapi) || 3388 (asoc->asoc.size_on_all_streams > 0) || 3389 (so && (so->so_rcv.sb_cc > 0))) { 3390 /* Left with Data unread */ 3391 struct mbuf *op_err; 3392 3393 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3394 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3395 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3396 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3397 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3398 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3399 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3400 } 3401 if (sctp_free_assoc(inp, asoc, 3402 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3403 cnt_in_sd++; 3404 } 3405 continue; 3406 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3407 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3408 (asoc->asoc.stream_queue_cnt == 0)) { 3409 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3410 goto abort_anyway; 3411 } 3412 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3413 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3414 struct sctp_nets *netp; 3415 3416 /* 3417 * there is nothing queued to send, 3418 * so I send shutdown 3419 */ 3420 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3421 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3422 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3423 } 3424 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3425 sctp_stop_timers_for_shutdown(asoc); 3426 if (asoc->asoc.alternate) { 3427 netp = asoc->asoc.alternate; 3428 } else { 3429 netp = asoc->asoc.primary_destination; 3430 } 3431 sctp_send_shutdown(asoc, netp); 3432 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3433 netp); 3434 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3435 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3436 } 3437 } else { 3438 /* mark into shutdown pending */ 3439 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3440 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3441 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3442 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3443 } 3444 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3445 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3446 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3447 struct mbuf *op_err; 3448 3449 abort_anyway: 3450 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3451 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3452 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3453 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3454 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3455 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3456 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3457 } 3458 if (sctp_free_assoc(inp, asoc, 3459 SCTP_PCBFREE_NOFORCE, 3460 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3461 cnt_in_sd++; 3462 } 3463 continue; 3464 } else { 3465 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3466 } 3467 } 3468 cnt_in_sd++; 3469 SCTP_TCB_UNLOCK(asoc); 3470 } 3471 /* now is there some left in our SHUTDOWN state? */ 3472 if (cnt_in_sd) { 3473 #ifdef SCTP_LOG_CLOSING 3474 sctp_log_closing(inp, NULL, 2); 3475 #endif 3476 inp->sctp_socket = NULL; 3477 SCTP_INP_WUNLOCK(inp); 3478 SCTP_ASOC_CREATE_UNLOCK(inp); 3479 SCTP_INP_INFO_WUNLOCK(); 3480 return; 3481 } 3482 } 3483 inp->sctp_socket = NULL; 3484 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3485 SCTP_PCB_FLAGS_UNBOUND) { 3486 /* 3487 * ok, this guy has been bound. It's port is somewhere in 3488 * the SCTP_BASE_INFO(hash table). Remove it! 3489 */ 3490 LIST_REMOVE(inp, sctp_hash); 3491 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3492 } 3493 3494 /* 3495 * If there is a timer running to kill us, forget it, since it may 3496 * have a contest on the INP lock.. which would cause us to die ... 3497 */ 3498 cnt = 0; 3499 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3500 SCTP_TCB_LOCK(asoc); 3501 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3502 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3503 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3504 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3505 } 3506 cnt++; 3507 SCTP_TCB_UNLOCK(asoc); 3508 continue; 3509 } 3510 /* Free associations that are NOT killing us */ 3511 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3512 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3513 struct mbuf *op_err; 3514 3515 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3516 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3517 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3518 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3519 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3520 cnt++; 3521 SCTP_TCB_UNLOCK(asoc); 3522 continue; 3523 } 3524 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3525 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3526 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3527 } 3528 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3529 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3530 cnt++; 3531 } 3532 } 3533 if (cnt) { 3534 /* Ok we have someone out there that will kill us */ 3535 #ifdef SCTP_LOG_CLOSING 3536 sctp_log_closing(inp, NULL, 3); 3537 #endif 3538 SCTP_INP_WUNLOCK(inp); 3539 SCTP_ASOC_CREATE_UNLOCK(inp); 3540 SCTP_INP_INFO_WUNLOCK(); 3541 return; 3542 } 3543 if (SCTP_INP_LOCK_CONTENDED(inp)) 3544 being_refed++; 3545 if (SCTP_INP_READ_CONTENDED(inp)) 3546 being_refed++; 3547 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3548 being_refed++; 3549 3550 if ((inp->refcount) || 3551 (being_refed) || 3552 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3553 #ifdef SCTP_LOG_CLOSING 3554 sctp_log_closing(inp, NULL, 4); 3555 #endif 3556 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3557 SCTP_INP_WUNLOCK(inp); 3558 SCTP_ASOC_CREATE_UNLOCK(inp); 3559 SCTP_INP_INFO_WUNLOCK(); 3560 return; 3561 } 3562 inp->sctp_ep.signature_change.type = 0; 3563 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3564 /* 3565 * Remove it from the list .. last thing we need a lock for. 3566 */ 3567 LIST_REMOVE(inp, sctp_list); 3568 SCTP_INP_WUNLOCK(inp); 3569 SCTP_ASOC_CREATE_UNLOCK(inp); 3570 SCTP_INP_INFO_WUNLOCK(); 3571 /* 3572 * Now we release all locks. Since this INP cannot be found anymore 3573 * except possibly by the kill timer that might be running. We call 3574 * the drain function here. It should hit the case were it sees the 3575 * ACTIVE flag cleared and exit out freeing us to proceed and 3576 * destroy everything. 3577 */ 3578 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3579 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3580 } else { 3581 /* Probably un-needed */ 3582 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3583 } 3584 3585 #ifdef SCTP_LOG_CLOSING 3586 sctp_log_closing(inp, NULL, 5); 3587 #endif 3588 3589 3590 if ((inp->sctp_asocidhash) != NULL) { 3591 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3592 inp->sctp_asocidhash = NULL; 3593 } 3594 /* sa_ignore FREED_MEMORY */ 3595 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3596 /* Its only abandoned if it had data left */ 3597 if (sq->length) 3598 SCTP_STAT_INCR(sctps_left_abandon); 3599 3600 TAILQ_REMOVE(&inp->read_queue, sq, next); 3601 sctp_free_remote_addr(sq->whoFrom); 3602 if (so) 3603 so->so_rcv.sb_cc -= sq->length; 3604 if (sq->data) { 3605 sctp_m_freem(sq->data); 3606 sq->data = NULL; 3607 } 3608 /* 3609 * no need to free the net count, since at this point all 3610 * assoc's are gone. 3611 */ 3612 sctp_free_a_readq(NULL, sq); 3613 } 3614 /* Now the sctp_pcb things */ 3615 /* 3616 * free each asoc if it is not already closed/free. we can't use the 3617 * macro here since le_next will get freed as part of the 3618 * sctp_free_assoc() call. 3619 */ 3620 if (ip_pcb->inp_options) { 3621 (void)sctp_m_free(ip_pcb->inp_options); 3622 ip_pcb->inp_options = 0; 3623 } 3624 3625 3626 #ifdef INET6 3627 if (ip_pcb->inp_vflag & INP_IPV6) { 3628 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3629 } 3630 #endif /* INET6 */ 3631 ip_pcb->inp_vflag = 0; 3632 /* free up authentication fields */ 3633 if (inp->sctp_ep.local_auth_chunks != NULL) 3634 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3635 if (inp->sctp_ep.local_hmacs != NULL) 3636 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3637 3638 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3639 LIST_REMOVE(shared_key, next); 3640 sctp_free_sharedkey(shared_key); 3641 /* sa_ignore FREED_MEMORY */ 3642 } 3643 3644 /* 3645 * if we have an address list the following will free the list of 3646 * ifaddr's that are set into this ep. Again macro limitations here, 3647 * since the LIST_FOREACH could be a bad idea. 3648 */ 3649 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3650 sctp_remove_laddr(laddr); 3651 } 3652 3653 #ifdef SCTP_TRACK_FREED_ASOCS 3654 /* TEMP CODE */ 3655 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3656 LIST_REMOVE(asoc, sctp_tcblist); 3657 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3658 SCTP_DECR_ASOC_COUNT(); 3659 } 3660 /* *** END TEMP CODE *** */ 3661 #endif 3662 /* Now lets see about freeing the EP hash table. */ 3663 if (inp->sctp_tcbhash != NULL) { 3664 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3665 inp->sctp_tcbhash = NULL; 3666 } 3667 /* Now we must put the ep memory back into the zone pool */ 3668 crfree(inp->ip_inp.inp.inp_cred); 3669 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3670 SCTP_INP_LOCK_DESTROY(inp); 3671 SCTP_INP_READ_DESTROY(inp); 3672 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3673 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3674 SCTP_DECR_EP_COUNT(); 3675 } 3676 3677 3678 struct sctp_nets * 3679 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3680 { 3681 struct sctp_nets *net; 3682 3683 /* locate the address */ 3684 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3685 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3686 return (net); 3687 } 3688 return (NULL); 3689 } 3690 3691 3692 int 3693 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3694 { 3695 struct sctp_ifa *sctp_ifa; 3696 3697 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3698 if (sctp_ifa) { 3699 return (1); 3700 } else { 3701 return (0); 3702 } 3703 } 3704 3705 /* 3706 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3707 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3708 * stats of stuff. 3709 */ 3710 int 3711 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3712 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3713 { 3714 /* 3715 * The following is redundant to the same lines in the 3716 * sctp_aloc_assoc() but is needed since others call the add address 3717 * function 3718 */ 3719 struct sctp_nets *net, *netfirst; 3720 int addr_inscope; 3721 3722 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3723 from); 3724 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3725 3726 netfirst = sctp_findnet(stcb, newaddr); 3727 if (netfirst) { 3728 /* 3729 * Lie and return ok, we don't want to make the association 3730 * go away for this behavior. It will happen in the TCP 3731 * model in a connected socket. It does not reach the hash 3732 * table until after the association is built so it can't be 3733 * found. Mark as reachable, since the initial creation will 3734 * have been cleared and the NOT_IN_ASSOC flag will have 3735 * been added... and we don't want to end up removing it 3736 * back out. 3737 */ 3738 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3739 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3740 SCTP_ADDR_UNCONFIRMED); 3741 } else { 3742 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3743 } 3744 3745 return (0); 3746 } 3747 addr_inscope = 1; 3748 switch (newaddr->sa_family) { 3749 #ifdef INET 3750 case AF_INET: 3751 { 3752 struct sockaddr_in *sin; 3753 3754 sin = (struct sockaddr_in *)newaddr; 3755 if (sin->sin_addr.s_addr == 0) { 3756 /* Invalid address */ 3757 return (-1); 3758 } 3759 /* zero out the zero area */ 3760 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3761 3762 /* assure len is set */ 3763 sin->sin_len = sizeof(struct sockaddr_in); 3764 if (set_scope) { 3765 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3766 stcb->asoc.scope.ipv4_local_scope = 1; 3767 } 3768 } else { 3769 /* Validate the address is in scope */ 3770 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3771 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3772 addr_inscope = 0; 3773 } 3774 } 3775 break; 3776 } 3777 #endif 3778 #ifdef INET6 3779 case AF_INET6: 3780 { 3781 struct sockaddr_in6 *sin6; 3782 3783 sin6 = (struct sockaddr_in6 *)newaddr; 3784 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3785 /* Invalid address */ 3786 return (-1); 3787 } 3788 /* assure len is set */ 3789 sin6->sin6_len = sizeof(struct sockaddr_in6); 3790 if (set_scope) { 3791 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3792 stcb->asoc.scope.loopback_scope = 1; 3793 stcb->asoc.scope.local_scope = 0; 3794 stcb->asoc.scope.ipv4_local_scope = 1; 3795 stcb->asoc.scope.site_scope = 1; 3796 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3797 /* 3798 * If the new destination is a 3799 * LINK_LOCAL we must have common 3800 * site scope. Don't set the local 3801 * scope since we may not share all 3802 * links, only loopback can do this. 3803 * Links on the local network would 3804 * also be on our private network 3805 * for v4 too. 3806 */ 3807 stcb->asoc.scope.ipv4_local_scope = 1; 3808 stcb->asoc.scope.site_scope = 1; 3809 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3810 /* 3811 * If the new destination is 3812 * SITE_LOCAL then we must have site 3813 * scope in common. 3814 */ 3815 stcb->asoc.scope.site_scope = 1; 3816 } 3817 } else { 3818 /* Validate the address is in scope */ 3819 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3820 (stcb->asoc.scope.loopback_scope == 0)) { 3821 addr_inscope = 0; 3822 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3823 (stcb->asoc.scope.local_scope == 0)) { 3824 addr_inscope = 0; 3825 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3826 (stcb->asoc.scope.site_scope == 0)) { 3827 addr_inscope = 0; 3828 } 3829 } 3830 break; 3831 } 3832 #endif 3833 default: 3834 /* not supported family type */ 3835 return (-1); 3836 } 3837 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3838 if (net == NULL) { 3839 return (-1); 3840 } 3841 SCTP_INCR_RADDR_COUNT(); 3842 memset(net, 0, sizeof(struct sctp_nets)); 3843 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3844 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3845 switch (newaddr->sa_family) { 3846 #ifdef INET 3847 case AF_INET: 3848 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3849 break; 3850 #endif 3851 #ifdef INET6 3852 case AF_INET6: 3853 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3854 break; 3855 #endif 3856 default: 3857 break; 3858 } 3859 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3860 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3861 stcb->asoc.scope.loopback_scope = 1; 3862 stcb->asoc.scope.ipv4_local_scope = 1; 3863 stcb->asoc.scope.local_scope = 0; 3864 stcb->asoc.scope.site_scope = 1; 3865 addr_inscope = 1; 3866 } 3867 net->failure_threshold = stcb->asoc.def_net_failure; 3868 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3869 if (addr_inscope == 0) { 3870 net->dest_state = (SCTP_ADDR_REACHABLE | 3871 SCTP_ADDR_OUT_OF_SCOPE); 3872 } else { 3873 if (from == SCTP_ADDR_IS_CONFIRMED) 3874 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3875 net->dest_state = SCTP_ADDR_REACHABLE; 3876 else 3877 net->dest_state = SCTP_ADDR_REACHABLE | 3878 SCTP_ADDR_UNCONFIRMED; 3879 } 3880 /* 3881 * We set this to 0, the timer code knows that this means its an 3882 * initial value 3883 */ 3884 net->rto_needed = 1; 3885 net->RTO = 0; 3886 net->RTO_measured = 0; 3887 stcb->asoc.numnets++; 3888 net->ref_count = 1; 3889 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3890 net->port = port; 3891 net->dscp = stcb->asoc.default_dscp; 3892 #ifdef INET6 3893 net->flowlabel = stcb->asoc.default_flowlabel; 3894 #endif 3895 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3896 net->dest_state |= SCTP_ADDR_NOHB; 3897 } else { 3898 net->dest_state &= ~SCTP_ADDR_NOHB; 3899 } 3900 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3901 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3902 } else { 3903 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3904 } 3905 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3906 /* Init the timer structure */ 3907 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3908 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3909 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3910 3911 /* Now generate a route for this guy */ 3912 #ifdef INET6 3913 /* KAME hack: embed scopeid */ 3914 if (newaddr->sa_family == AF_INET6) { 3915 struct sockaddr_in6 *sin6; 3916 3917 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3918 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3919 sin6->sin6_scope_id = 0; 3920 } 3921 #endif 3922 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3923 stcb->asoc.vrf_id, 3924 stcb->sctp_ep->fibnum); 3925 3926 net->src_addr_selected = 0; 3927 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3928 /* Get source address */ 3929 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3930 stcb, 3931 (sctp_route_t *)&net->ro, 3932 net, 3933 0, 3934 stcb->asoc.vrf_id); 3935 if (stcb->asoc.default_mtu > 0) { 3936 net->mtu = stcb->asoc.default_mtu; 3937 switch (net->ro._l_addr.sa.sa_family) { 3938 #ifdef INET 3939 case AF_INET: 3940 net->mtu += SCTP_MIN_V4_OVERHEAD; 3941 break; 3942 #endif 3943 #ifdef INET6 3944 case AF_INET6: 3945 net->mtu += SCTP_MIN_OVERHEAD; 3946 break; 3947 #endif 3948 default: 3949 break; 3950 } 3951 #if defined(INET) || defined(INET6) 3952 if (net->port) { 3953 net->mtu += (uint32_t)sizeof(struct udphdr); 3954 } 3955 #endif 3956 } else if (net->ro._s_addr != NULL) { 3957 uint32_t imtu, rmtu, hcmtu; 3958 3959 net->src_addr_selected = 1; 3960 /* Now get the interface MTU */ 3961 if (net->ro._s_addr->ifn_p != NULL) { 3962 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3963 } else { 3964 imtu = 0; 3965 } 3966 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 3967 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3968 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3969 } 3970 } 3971 if (net->mtu == 0) { 3972 if (stcb->asoc.default_mtu > 0) { 3973 net->mtu = stcb->asoc.default_mtu; 3974 switch (net->ro._l_addr.sa.sa_family) { 3975 #ifdef INET 3976 case AF_INET: 3977 net->mtu += SCTP_MIN_V4_OVERHEAD; 3978 break; 3979 #endif 3980 #ifdef INET6 3981 case AF_INET6: 3982 net->mtu += SCTP_MIN_OVERHEAD; 3983 break; 3984 #endif 3985 default: 3986 break; 3987 } 3988 #if defined(INET) || defined(INET6) 3989 if (net->port) { 3990 net->mtu += (uint32_t)sizeof(struct udphdr); 3991 } 3992 #endif 3993 } else { 3994 switch (newaddr->sa_family) { 3995 #ifdef INET 3996 case AF_INET: 3997 net->mtu = SCTP_DEFAULT_MTU; 3998 break; 3999 #endif 4000 #ifdef INET6 4001 case AF_INET6: 4002 net->mtu = 1280; 4003 break; 4004 #endif 4005 default: 4006 break; 4007 } 4008 } 4009 } 4010 #if defined(INET) || defined(INET6) 4011 if (net->port) { 4012 net->mtu -= (uint32_t)sizeof(struct udphdr); 4013 } 4014 #endif 4015 if (from == SCTP_ALLOC_ASOC) { 4016 stcb->asoc.smallest_mtu = net->mtu; 4017 } 4018 if (stcb->asoc.smallest_mtu > net->mtu) { 4019 sctp_pathmtu_adjustment(stcb, net->mtu); 4020 } 4021 #ifdef INET6 4022 if (newaddr->sa_family == AF_INET6) { 4023 struct sockaddr_in6 *sin6; 4024 4025 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4026 (void)sa6_recoverscope(sin6); 4027 } 4028 #endif 4029 4030 /* JRS - Use the congestion control given in the CC module */ 4031 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4032 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4033 4034 /* 4035 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4036 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4037 */ 4038 net->find_pseudo_cumack = 1; 4039 net->find_rtx_pseudo_cumack = 1; 4040 /* Choose an initial flowid. */ 4041 net->flowid = stcb->asoc.my_vtag ^ 4042 ntohs(stcb->rport) ^ 4043 ntohs(stcb->sctp_ep->sctp_lport); 4044 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4045 if (netp) { 4046 *netp = net; 4047 } 4048 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4049 if (net->ro.ro_nh == NULL) { 4050 /* Since we have no route put it at the back */ 4051 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4052 } else if (netfirst == NULL) { 4053 /* We are the first one in the pool. */ 4054 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4055 } else if (netfirst->ro.ro_nh == NULL) { 4056 /* 4057 * First one has NO route. Place this one ahead of the first 4058 * one. 4059 */ 4060 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4061 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4062 /* 4063 * This one has a different interface than the one at the 4064 * top of the list. Place it ahead. 4065 */ 4066 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4067 } else { 4068 /* 4069 * Ok we have the same interface as the first one. Move 4070 * forward until we find either a) one with a NULL route... 4071 * insert ahead of that b) one with a different ifp.. insert 4072 * after that. c) end of the list.. insert at the tail. 4073 */ 4074 struct sctp_nets *netlook; 4075 4076 do { 4077 netlook = TAILQ_NEXT(netfirst, sctp_next); 4078 if (netlook == NULL) { 4079 /* End of the list */ 4080 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4081 break; 4082 } else if (netlook->ro.ro_nh == NULL) { 4083 /* next one has NO route */ 4084 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4085 break; 4086 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4087 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4088 net, sctp_next); 4089 break; 4090 } 4091 /* Shift forward */ 4092 netfirst = netlook; 4093 } while (netlook != NULL); 4094 } 4095 4096 /* got to have a primary set */ 4097 if (stcb->asoc.primary_destination == 0) { 4098 stcb->asoc.primary_destination = net; 4099 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4100 (net->ro.ro_nh) && 4101 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4102 /* No route to current primary adopt new primary */ 4103 stcb->asoc.primary_destination = net; 4104 } 4105 /* Validate primary is first */ 4106 net = TAILQ_FIRST(&stcb->asoc.nets); 4107 if ((net != stcb->asoc.primary_destination) && 4108 (stcb->asoc.primary_destination)) { 4109 /* 4110 * first one on the list is NOT the primary sctp_cmpaddr() 4111 * is much more efficient if the primary is the first on the 4112 * list, make it so. 4113 */ 4114 TAILQ_REMOVE(&stcb->asoc.nets, 4115 stcb->asoc.primary_destination, sctp_next); 4116 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4117 stcb->asoc.primary_destination, sctp_next); 4118 } 4119 return (0); 4120 } 4121 4122 4123 static uint32_t 4124 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4125 { 4126 uint32_t id; 4127 struct sctpasochead *head; 4128 struct sctp_tcb *lstcb; 4129 4130 try_again: 4131 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4132 /* TSNH */ 4133 return (0); 4134 } 4135 /* 4136 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4137 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4138 */ 4139 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4140 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4141 } 4142 id = inp->sctp_associd_counter; 4143 inp->sctp_associd_counter++; 4144 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4145 if (lstcb) { 4146 goto try_again; 4147 } 4148 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4149 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4150 stcb->asoc.in_asocid_hash = 1; 4151 return (id); 4152 } 4153 4154 /* 4155 * allocate an association and add it to the endpoint. The caller must be 4156 * careful to add all additional addresses once they are know right away or 4157 * else the assoc will be may experience a blackout scenario. 4158 */ 4159 struct sctp_tcb * 4160 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4161 int *error, uint32_t override_tag, uint32_t vrf_id, 4162 uint16_t o_streams, uint16_t port, 4163 struct thread *p, 4164 int initialize_auth_params) 4165 { 4166 /* note the p argument is only valid in unbound sockets */ 4167 4168 struct sctp_tcb *stcb; 4169 struct sctp_association *asoc; 4170 struct sctpasochead *head; 4171 uint16_t rport; 4172 int err; 4173 4174 /* 4175 * Assumption made here: Caller has done a 4176 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4177 * address does not exist already. 4178 */ 4179 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4180 /* Hit max assoc, sorry no more */ 4181 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4182 *error = ENOBUFS; 4183 return (NULL); 4184 } 4185 if (firstaddr == NULL) { 4186 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4187 *error = EINVAL; 4188 return (NULL); 4189 } 4190 SCTP_INP_RLOCK(inp); 4191 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4192 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4193 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4194 /* 4195 * If its in the TCP pool, its NOT allowed to create an 4196 * association. The parent listener needs to call 4197 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4198 * off, or connected one does this.. its an error. 4199 */ 4200 SCTP_INP_RUNLOCK(inp); 4201 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4202 *error = EINVAL; 4203 return (NULL); 4204 } 4205 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4206 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4207 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4208 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4209 SCTP_INP_RUNLOCK(inp); 4210 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4211 *error = EINVAL; 4212 return (NULL); 4213 } 4214 } 4215 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4216 #ifdef SCTP_DEBUG 4217 if (firstaddr) { 4218 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4219 switch (firstaddr->sa_family) { 4220 #ifdef INET 4221 case AF_INET: 4222 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4223 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4224 break; 4225 #endif 4226 #ifdef INET6 4227 case AF_INET6: 4228 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4229 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4230 break; 4231 #endif 4232 default: 4233 break; 4234 } 4235 } else { 4236 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4237 } 4238 #endif /* SCTP_DEBUG */ 4239 switch (firstaddr->sa_family) { 4240 #ifdef INET 4241 case AF_INET: 4242 { 4243 struct sockaddr_in *sin; 4244 4245 sin = (struct sockaddr_in *)firstaddr; 4246 if ((ntohs(sin->sin_port) == 0) || 4247 (sin->sin_addr.s_addr == INADDR_ANY) || 4248 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4249 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4250 /* Invalid address */ 4251 SCTP_INP_RUNLOCK(inp); 4252 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4253 *error = EINVAL; 4254 return (NULL); 4255 } 4256 rport = sin->sin_port; 4257 break; 4258 } 4259 #endif 4260 #ifdef INET6 4261 case AF_INET6: 4262 { 4263 struct sockaddr_in6 *sin6; 4264 4265 sin6 = (struct sockaddr_in6 *)firstaddr; 4266 if ((ntohs(sin6->sin6_port) == 0) || 4267 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4268 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4269 /* Invalid address */ 4270 SCTP_INP_RUNLOCK(inp); 4271 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4272 *error = EINVAL; 4273 return (NULL); 4274 } 4275 rport = sin6->sin6_port; 4276 break; 4277 } 4278 #endif 4279 default: 4280 /* not supported family type */ 4281 SCTP_INP_RUNLOCK(inp); 4282 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4283 *error = EINVAL; 4284 return (NULL); 4285 } 4286 SCTP_INP_RUNLOCK(inp); 4287 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4288 /* 4289 * If you have not performed a bind, then we need to do the 4290 * ephemeral bind for you. 4291 */ 4292 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) { 4293 /* bind error, probably perm */ 4294 *error = err; 4295 return (NULL); 4296 } 4297 } 4298 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4299 if (stcb == NULL) { 4300 /* out of memory? */ 4301 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4302 *error = ENOMEM; 4303 return (NULL); 4304 } 4305 SCTP_INCR_ASOC_COUNT(); 4306 4307 memset(stcb, 0, sizeof(*stcb)); 4308 asoc = &stcb->asoc; 4309 4310 SCTP_TCB_LOCK_INIT(stcb); 4311 SCTP_TCB_SEND_LOCK_INIT(stcb); 4312 stcb->rport = rport; 4313 /* setup back pointer's */ 4314 stcb->sctp_ep = inp; 4315 stcb->sctp_socket = inp->sctp_socket; 4316 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4317 /* failed */ 4318 SCTP_TCB_LOCK_DESTROY(stcb); 4319 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4320 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4321 SCTP_DECR_ASOC_COUNT(); 4322 *error = err; 4323 return (NULL); 4324 } 4325 /* and the port */ 4326 SCTP_INP_INFO_WLOCK(); 4327 SCTP_INP_WLOCK(inp); 4328 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4329 /* inpcb freed while alloc going on */ 4330 SCTP_TCB_LOCK_DESTROY(stcb); 4331 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4332 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4333 SCTP_INP_WUNLOCK(inp); 4334 SCTP_INP_INFO_WUNLOCK(); 4335 SCTP_DECR_ASOC_COUNT(); 4336 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4337 *error = EINVAL; 4338 return (NULL); 4339 } 4340 SCTP_TCB_LOCK(stcb); 4341 4342 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4343 /* now that my_vtag is set, add it to the hash */ 4344 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4345 /* put it in the bucket in the vtag hash of assoc's for the system */ 4346 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4347 SCTP_INP_INFO_WUNLOCK(); 4348 4349 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4350 /* failure.. memory error? */ 4351 if (asoc->strmout) { 4352 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4353 asoc->strmout = NULL; 4354 } 4355 if (asoc->mapping_array) { 4356 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4357 asoc->mapping_array = NULL; 4358 } 4359 if (asoc->nr_mapping_array) { 4360 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4361 asoc->nr_mapping_array = NULL; 4362 } 4363 SCTP_DECR_ASOC_COUNT(); 4364 SCTP_TCB_UNLOCK(stcb); 4365 SCTP_TCB_LOCK_DESTROY(stcb); 4366 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4367 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4368 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4369 SCTP_INP_WUNLOCK(inp); 4370 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4371 *error = ENOBUFS; 4372 return (NULL); 4373 } 4374 /* Init all the timers */ 4375 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4376 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4377 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4378 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4379 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4380 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4381 4382 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4383 /* now file the port under the hash as well */ 4384 if (inp->sctp_tcbhash != NULL) { 4385 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4386 inp->sctp_hashmark)]; 4387 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4388 } 4389 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4390 sctp_initialize_auth_params(inp, stcb); 4391 } 4392 SCTP_INP_WUNLOCK(inp); 4393 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4394 return (stcb); 4395 } 4396 4397 4398 void 4399 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4400 { 4401 struct sctp_inpcb *inp; 4402 struct sctp_association *asoc; 4403 4404 inp = stcb->sctp_ep; 4405 asoc = &stcb->asoc; 4406 asoc->numnets--; 4407 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4408 if (net == asoc->primary_destination) { 4409 /* Reset primary */ 4410 struct sctp_nets *lnet; 4411 4412 lnet = TAILQ_FIRST(&asoc->nets); 4413 /* 4414 * Mobility adaptation Ideally, if deleted destination is 4415 * the primary, it becomes a fast retransmission trigger by 4416 * the subsequent SET PRIMARY. (by micchie) 4417 */ 4418 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4419 SCTP_MOBILITY_BASE) || 4420 sctp_is_mobility_feature_on(stcb->sctp_ep, 4421 SCTP_MOBILITY_FASTHANDOFF)) { 4422 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4423 if (asoc->deleted_primary != NULL) { 4424 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4425 goto out; 4426 } 4427 asoc->deleted_primary = net; 4428 atomic_add_int(&net->ref_count, 1); 4429 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4430 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4431 sctp_mobility_feature_on(stcb->sctp_ep, 4432 SCTP_MOBILITY_PRIM_DELETED); 4433 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4434 stcb->sctp_ep, stcb, NULL); 4435 } 4436 out: 4437 /* Try to find a confirmed primary */ 4438 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4439 } 4440 if (net == asoc->last_data_chunk_from) { 4441 /* Reset primary */ 4442 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4443 } 4444 if (net == asoc->last_control_chunk_from) { 4445 /* Clear net */ 4446 asoc->last_control_chunk_from = NULL; 4447 } 4448 if (net == stcb->asoc.alternate) { 4449 sctp_free_remote_addr(stcb->asoc.alternate); 4450 stcb->asoc.alternate = NULL; 4451 } 4452 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4453 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4454 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4455 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4456 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4457 sctp_free_remote_addr(net); 4458 } 4459 4460 /* 4461 * remove a remote endpoint address from an association, it will fail if the 4462 * address does not exist. 4463 */ 4464 int 4465 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4466 { 4467 /* 4468 * Here we need to remove a remote address. This is quite simple, we 4469 * first find it in the list of address for the association 4470 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4471 * on that item. Note we do not allow it to be removed if there are 4472 * no other addresses. 4473 */ 4474 struct sctp_association *asoc; 4475 struct sctp_nets *net, *nnet; 4476 4477 asoc = &stcb->asoc; 4478 4479 /* locate the address */ 4480 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4481 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4482 continue; 4483 } 4484 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4485 remaddr)) { 4486 /* we found the guy */ 4487 if (asoc->numnets < 2) { 4488 /* Must have at LEAST two remote addresses */ 4489 return (-1); 4490 } else { 4491 sctp_remove_net(stcb, net); 4492 return (0); 4493 } 4494 } 4495 } 4496 /* not found. */ 4497 return (-2); 4498 } 4499 4500 void 4501 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4502 { 4503 struct sctpvtaghead *chain; 4504 struct sctp_tagblock *twait_block; 4505 int found = 0; 4506 int i; 4507 4508 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4509 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4510 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4511 if ((twait_block->vtag_block[i].v_tag == tag) && 4512 (twait_block->vtag_block[i].lport == lport) && 4513 (twait_block->vtag_block[i].rport == rport)) { 4514 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4515 twait_block->vtag_block[i].v_tag = 0; 4516 twait_block->vtag_block[i].lport = 0; 4517 twait_block->vtag_block[i].rport = 0; 4518 found = 1; 4519 break; 4520 } 4521 } 4522 if (found) 4523 break; 4524 } 4525 } 4526 4527 int 4528 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4529 { 4530 struct sctpvtaghead *chain; 4531 struct sctp_tagblock *twait_block; 4532 int found = 0; 4533 int i; 4534 4535 SCTP_INP_INFO_WLOCK(); 4536 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4537 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4538 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4539 if ((twait_block->vtag_block[i].v_tag == tag) && 4540 (twait_block->vtag_block[i].lport == lport) && 4541 (twait_block->vtag_block[i].rport == rport)) { 4542 found = 1; 4543 break; 4544 } 4545 } 4546 if (found) 4547 break; 4548 } 4549 SCTP_INP_INFO_WUNLOCK(); 4550 return (found); 4551 } 4552 4553 4554 void 4555 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4556 { 4557 struct sctpvtaghead *chain; 4558 struct sctp_tagblock *twait_block; 4559 struct timeval now; 4560 int set, i; 4561 4562 if (time == 0) { 4563 /* Its disabled */ 4564 return; 4565 } 4566 (void)SCTP_GETTIME_TIMEVAL(&now); 4567 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4568 set = 0; 4569 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4570 /* Block(s) present, lets find space, and expire on the fly */ 4571 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4572 if ((twait_block->vtag_block[i].v_tag == 0) && 4573 !set) { 4574 twait_block->vtag_block[i].tv_sec_at_expire = 4575 now.tv_sec + time; 4576 twait_block->vtag_block[i].v_tag = tag; 4577 twait_block->vtag_block[i].lport = lport; 4578 twait_block->vtag_block[i].rport = rport; 4579 set = 1; 4580 } else if ((twait_block->vtag_block[i].v_tag) && 4581 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4582 /* Audit expires this guy */ 4583 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4584 twait_block->vtag_block[i].v_tag = 0; 4585 twait_block->vtag_block[i].lport = 0; 4586 twait_block->vtag_block[i].rport = 0; 4587 if (set == 0) { 4588 /* Reuse it for my new tag */ 4589 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4590 twait_block->vtag_block[i].v_tag = tag; 4591 twait_block->vtag_block[i].lport = lport; 4592 twait_block->vtag_block[i].rport = rport; 4593 set = 1; 4594 } 4595 } 4596 } 4597 if (set) { 4598 /* 4599 * We only do up to the block where we can place our 4600 * tag for audits 4601 */ 4602 break; 4603 } 4604 } 4605 /* Need to add a new block to chain */ 4606 if (!set) { 4607 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4608 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4609 if (twait_block == NULL) { 4610 return; 4611 } 4612 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4613 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4614 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4615 twait_block->vtag_block[0].v_tag = tag; 4616 twait_block->vtag_block[0].lport = lport; 4617 twait_block->vtag_block[0].rport = rport; 4618 } 4619 } 4620 4621 void 4622 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4623 { 4624 struct sctp_tmit_chunk *chk, *nchk; 4625 struct sctp_queued_to_read *control, *ncontrol; 4626 4627 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4628 TAILQ_REMOVE(rh, control, next_instrm); 4629 control->on_strm_q = 0; 4630 if (control->on_read_q == 0) { 4631 sctp_free_remote_addr(control->whoFrom); 4632 if (control->data) { 4633 sctp_m_freem(control->data); 4634 control->data = NULL; 4635 } 4636 } 4637 /* Reassembly free? */ 4638 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4639 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4640 if (chk->data) { 4641 sctp_m_freem(chk->data); 4642 chk->data = NULL; 4643 } 4644 if (chk->holds_key_ref) 4645 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4646 sctp_free_remote_addr(chk->whoTo); 4647 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4648 SCTP_DECR_CHK_COUNT(); 4649 /* sa_ignore FREED_MEMORY */ 4650 } 4651 /* 4652 * We don't free the address here since all the net's were 4653 * freed above. 4654 */ 4655 if (control->on_read_q == 0) { 4656 sctp_free_a_readq(stcb, control); 4657 } 4658 } 4659 } 4660 4661 /*- 4662 * Free the association after un-hashing the remote port. This 4663 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4664 * expect that the input to this function IS a locked TCB. 4665 * It will return 0, if it did NOT destroy the association (instead 4666 * it unlocks it. It will return NON-zero if it either destroyed the 4667 * association OR the association is already destroyed. 4668 */ 4669 int 4670 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4671 { 4672 int i; 4673 struct sctp_association *asoc; 4674 struct sctp_nets *net, *nnet; 4675 struct sctp_laddr *laddr, *naddr; 4676 struct sctp_tmit_chunk *chk, *nchk; 4677 struct sctp_asconf_addr *aparam, *naparam; 4678 struct sctp_asconf_ack *aack, *naack; 4679 struct sctp_stream_reset_list *strrst, *nstrrst; 4680 struct sctp_queued_to_read *sq, *nsq; 4681 struct sctp_stream_queue_pending *sp, *nsp; 4682 sctp_sharedkey_t *shared_key, *nshared_key; 4683 struct socket *so; 4684 4685 /* first, lets purge the entry from the hash table. */ 4686 4687 #ifdef SCTP_LOG_CLOSING 4688 sctp_log_closing(inp, stcb, 6); 4689 #endif 4690 if (stcb->asoc.state == 0) { 4691 #ifdef SCTP_LOG_CLOSING 4692 sctp_log_closing(inp, NULL, 7); 4693 #endif 4694 /* there is no asoc, really TSNH :-0 */ 4695 return (1); 4696 } 4697 if (stcb->asoc.alternate) { 4698 sctp_free_remote_addr(stcb->asoc.alternate); 4699 stcb->asoc.alternate = NULL; 4700 } 4701 /* TEMP CODE */ 4702 if (stcb->freed_from_where == 0) { 4703 /* Only record the first place free happened from */ 4704 stcb->freed_from_where = from_location; 4705 } 4706 /* TEMP CODE */ 4707 4708 asoc = &stcb->asoc; 4709 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4710 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4711 /* nothing around */ 4712 so = NULL; 4713 else 4714 so = inp->sctp_socket; 4715 4716 /* 4717 * We used timer based freeing if a reader or writer is in the way. 4718 * So we first check if we are actually being called from a timer, 4719 * if so we abort early if a reader or writer is still in the way. 4720 */ 4721 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4722 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4723 /* 4724 * is it the timer driving us? if so are the reader/writers 4725 * gone? 4726 */ 4727 if (stcb->asoc.refcnt) { 4728 /* nope, reader or writer in the way */ 4729 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4730 /* no asoc destroyed */ 4731 SCTP_TCB_UNLOCK(stcb); 4732 #ifdef SCTP_LOG_CLOSING 4733 sctp_log_closing(inp, stcb, 8); 4734 #endif 4735 return (0); 4736 } 4737 } 4738 /* Now clean up any other timers */ 4739 sctp_stop_association_timers(stcb, false); 4740 /* Now the read queue needs to be cleaned up (only once) */ 4741 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4742 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4743 SCTP_INP_READ_LOCK(inp); 4744 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4745 if (sq->stcb == stcb) { 4746 sq->do_not_ref_stcb = 1; 4747 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4748 /* 4749 * If there is no end, there never will be 4750 * now. 4751 */ 4752 if (sq->end_added == 0) { 4753 /* Held for PD-API clear that. */ 4754 sq->pdapi_aborted = 1; 4755 sq->held_length = 0; 4756 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4757 /* 4758 * Need to add a PD-API 4759 * aborted indication. 4760 * Setting the control_pdapi 4761 * assures that it will be 4762 * added right after this 4763 * msg. 4764 */ 4765 uint32_t strseq; 4766 4767 stcb->asoc.control_pdapi = sq; 4768 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4769 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4770 stcb, 4771 SCTP_PARTIAL_DELIVERY_ABORTED, 4772 (void *)&strseq, 4773 SCTP_SO_LOCKED); 4774 stcb->asoc.control_pdapi = NULL; 4775 } 4776 } 4777 /* Add an end to wake them */ 4778 sq->end_added = 1; 4779 } 4780 } 4781 SCTP_INP_READ_UNLOCK(inp); 4782 if (stcb->block_entry) { 4783 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4784 stcb->block_entry->error = ECONNRESET; 4785 stcb->block_entry = NULL; 4786 } 4787 } 4788 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4789 /* 4790 * Someone holds a reference OR the socket is unaccepted 4791 * yet. 4792 */ 4793 if ((stcb->asoc.refcnt) || 4794 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4795 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4796 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4797 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4798 } 4799 SCTP_TCB_UNLOCK(stcb); 4800 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4801 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4802 /* nothing around */ 4803 so = NULL; 4804 if (so) { 4805 /* Wake any reader/writers */ 4806 sctp_sorwakeup(inp, so); 4807 sctp_sowwakeup(inp, so); 4808 } 4809 4810 #ifdef SCTP_LOG_CLOSING 4811 sctp_log_closing(inp, stcb, 9); 4812 #endif 4813 /* no asoc destroyed */ 4814 return (0); 4815 } 4816 #ifdef SCTP_LOG_CLOSING 4817 sctp_log_closing(inp, stcb, 10); 4818 #endif 4819 /* 4820 * When I reach here, no others want to kill the assoc yet.. and I 4821 * own the lock. Now its possible an abort comes in when I do the 4822 * lock exchange below to grab all the locks to do the final take 4823 * out. to prevent this we increment the count, which will start a 4824 * timer and blow out above thus assuring us that we hold exclusive 4825 * killing of the asoc. Note that after getting back the TCB lock we 4826 * will go ahead and increment the counter back up and stop any 4827 * timer a passing stranger may have started :-S 4828 */ 4829 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4830 atomic_add_int(&stcb->asoc.refcnt, 1); 4831 4832 SCTP_TCB_UNLOCK(stcb); 4833 SCTP_INP_INFO_WLOCK(); 4834 SCTP_INP_WLOCK(inp); 4835 SCTP_TCB_LOCK(stcb); 4836 } 4837 /* Double check the GONE flag */ 4838 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4839 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4840 /* nothing around */ 4841 so = NULL; 4842 4843 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4844 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4845 /* 4846 * For TCP type we need special handling when we are 4847 * connected. We also include the peel'ed off ones to. 4848 */ 4849 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4850 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4851 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4852 if (so) { 4853 SOCKBUF_LOCK(&so->so_rcv); 4854 so->so_state &= ~(SS_ISCONNECTING | 4855 SS_ISDISCONNECTING | 4856 SS_ISCONFIRMING | 4857 SS_ISCONNECTED); 4858 so->so_state |= SS_ISDISCONNECTED; 4859 socantrcvmore_locked(so); 4860 socantsendmore(so); 4861 sctp_sowwakeup(inp, so); 4862 sctp_sorwakeup(inp, so); 4863 SCTP_SOWAKEUP(so); 4864 } 4865 } 4866 } 4867 4868 /* 4869 * Make it invalid too, that way if its about to run it will abort 4870 * and return. 4871 */ 4872 /* re-increment the lock */ 4873 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4874 atomic_add_int(&stcb->asoc.refcnt, -1); 4875 } 4876 if (stcb->asoc.refcnt) { 4877 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4878 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4879 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4880 SCTP_INP_INFO_WUNLOCK(); 4881 SCTP_INP_WUNLOCK(inp); 4882 } 4883 SCTP_TCB_UNLOCK(stcb); 4884 return (0); 4885 } 4886 asoc->state = 0; 4887 if (inp->sctp_tcbhash) { 4888 LIST_REMOVE(stcb, sctp_tcbhash); 4889 } 4890 if (stcb->asoc.in_asocid_hash) { 4891 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4892 } 4893 /* Now lets remove it from the list of ALL associations in the EP */ 4894 LIST_REMOVE(stcb, sctp_tcblist); 4895 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4896 SCTP_INP_INCR_REF(inp); 4897 SCTP_INP_WUNLOCK(inp); 4898 } 4899 /* pull from vtag hash */ 4900 LIST_REMOVE(stcb, sctp_asocs); 4901 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4902 inp->sctp_lport, stcb->rport); 4903 4904 /* 4905 * Now restop the timers to be sure this is paranoia at is finest! 4906 */ 4907 sctp_stop_association_timers(stcb, true); 4908 4909 /* 4910 * The chunk lists and such SHOULD be empty but we check them just 4911 * in case. 4912 */ 4913 /* anything on the wheel needs to be removed */ 4914 SCTP_TCB_SEND_LOCK(stcb); 4915 for (i = 0; i < asoc->streamoutcnt; i++) { 4916 struct sctp_stream_out *outs; 4917 4918 outs = &asoc->strmout[i]; 4919 /* now clean up any chunks here */ 4920 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4921 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4922 TAILQ_REMOVE(&outs->outqueue, sp, next); 4923 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1); 4924 sctp_free_spbufspace(stcb, asoc, sp); 4925 if (sp->data) { 4926 if (so) { 4927 /* Still an open socket - report */ 4928 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4929 0, (void *)sp, SCTP_SO_LOCKED); 4930 } 4931 if (sp->data) { 4932 sctp_m_freem(sp->data); 4933 sp->data = NULL; 4934 sp->tail_mbuf = NULL; 4935 sp->length = 0; 4936 } 4937 } 4938 if (sp->net) { 4939 sctp_free_remote_addr(sp->net); 4940 sp->net = NULL; 4941 } 4942 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4943 } 4944 } 4945 SCTP_TCB_SEND_UNLOCK(stcb); 4946 /* sa_ignore FREED_MEMORY */ 4947 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4948 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4949 SCTP_FREE(strrst, SCTP_M_STRESET); 4950 } 4951 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4952 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4953 if (sq->data) { 4954 sctp_m_freem(sq->data); 4955 sq->data = NULL; 4956 } 4957 sctp_free_remote_addr(sq->whoFrom); 4958 sq->whoFrom = NULL; 4959 sq->stcb = NULL; 4960 /* Free the ctl entry */ 4961 sctp_free_a_readq(stcb, sq); 4962 /* sa_ignore FREED_MEMORY */ 4963 } 4964 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4965 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4966 if (chk->data) { 4967 sctp_m_freem(chk->data); 4968 chk->data = NULL; 4969 } 4970 if (chk->holds_key_ref) 4971 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4972 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4973 SCTP_DECR_CHK_COUNT(); 4974 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4975 asoc->free_chunk_cnt--; 4976 /* sa_ignore FREED_MEMORY */ 4977 } 4978 /* pending send queue SHOULD be empty */ 4979 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4980 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 4981 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 4982 #ifdef INVARIANTS 4983 } else { 4984 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 4985 #endif 4986 } 4987 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4988 if (chk->data) { 4989 if (so) { 4990 /* Still a socket? */ 4991 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4992 0, chk, SCTP_SO_LOCKED); 4993 } 4994 if (chk->data) { 4995 sctp_m_freem(chk->data); 4996 chk->data = NULL; 4997 } 4998 } 4999 if (chk->holds_key_ref) 5000 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5001 if (chk->whoTo) { 5002 sctp_free_remote_addr(chk->whoTo); 5003 chk->whoTo = NULL; 5004 } 5005 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5006 SCTP_DECR_CHK_COUNT(); 5007 /* sa_ignore FREED_MEMORY */ 5008 } 5009 /* sent queue SHOULD be empty */ 5010 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5011 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5012 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5013 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5014 #ifdef INVARIANTS 5015 } else { 5016 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5017 #endif 5018 } 5019 } 5020 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5021 if (chk->data) { 5022 if (so) { 5023 /* Still a socket? */ 5024 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5025 0, chk, SCTP_SO_LOCKED); 5026 } 5027 if (chk->data) { 5028 sctp_m_freem(chk->data); 5029 chk->data = NULL; 5030 } 5031 } 5032 if (chk->holds_key_ref) 5033 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5034 sctp_free_remote_addr(chk->whoTo); 5035 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5036 SCTP_DECR_CHK_COUNT(); 5037 /* sa_ignore FREED_MEMORY */ 5038 } 5039 #ifdef INVARIANTS 5040 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5041 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5042 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5043 } 5044 } 5045 #endif 5046 /* control queue MAY not be empty */ 5047 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5048 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5049 if (chk->data) { 5050 sctp_m_freem(chk->data); 5051 chk->data = NULL; 5052 } 5053 if (chk->holds_key_ref) 5054 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5055 sctp_free_remote_addr(chk->whoTo); 5056 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5057 SCTP_DECR_CHK_COUNT(); 5058 /* sa_ignore FREED_MEMORY */ 5059 } 5060 /* ASCONF queue MAY not be empty */ 5061 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5062 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5063 if (chk->data) { 5064 sctp_m_freem(chk->data); 5065 chk->data = NULL; 5066 } 5067 if (chk->holds_key_ref) 5068 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5069 sctp_free_remote_addr(chk->whoTo); 5070 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5071 SCTP_DECR_CHK_COUNT(); 5072 /* sa_ignore FREED_MEMORY */ 5073 } 5074 if (asoc->mapping_array) { 5075 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5076 asoc->mapping_array = NULL; 5077 } 5078 if (asoc->nr_mapping_array) { 5079 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5080 asoc->nr_mapping_array = NULL; 5081 } 5082 /* the stream outs */ 5083 if (asoc->strmout) { 5084 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5085 asoc->strmout = NULL; 5086 } 5087 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5088 if (asoc->strmin) { 5089 for (i = 0; i < asoc->streamincnt; i++) { 5090 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5091 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5092 } 5093 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5094 asoc->strmin = NULL; 5095 } 5096 asoc->streamincnt = 0; 5097 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5098 #ifdef INVARIANTS 5099 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5100 panic("no net's left alloc'ed, or list points to itself"); 5101 } 5102 #endif 5103 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5104 sctp_free_remote_addr(net); 5105 } 5106 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5107 /* sa_ignore FREED_MEMORY */ 5108 sctp_remove_laddr(laddr); 5109 } 5110 5111 /* pending asconf (address) parameters */ 5112 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5113 /* sa_ignore FREED_MEMORY */ 5114 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5115 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5116 } 5117 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5118 /* sa_ignore FREED_MEMORY */ 5119 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5120 if (aack->data != NULL) { 5121 sctp_m_freem(aack->data); 5122 } 5123 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5124 } 5125 /* clean up auth stuff */ 5126 if (asoc->local_hmacs) 5127 sctp_free_hmaclist(asoc->local_hmacs); 5128 if (asoc->peer_hmacs) 5129 sctp_free_hmaclist(asoc->peer_hmacs); 5130 5131 if (asoc->local_auth_chunks) 5132 sctp_free_chunklist(asoc->local_auth_chunks); 5133 if (asoc->peer_auth_chunks) 5134 sctp_free_chunklist(asoc->peer_auth_chunks); 5135 5136 sctp_free_authinfo(&asoc->authinfo); 5137 5138 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5139 LIST_REMOVE(shared_key, next); 5140 sctp_free_sharedkey(shared_key); 5141 /* sa_ignore FREED_MEMORY */ 5142 } 5143 5144 /* Insert new items here :> */ 5145 5146 /* Get rid of LOCK */ 5147 SCTP_TCB_UNLOCK(stcb); 5148 SCTP_TCB_LOCK_DESTROY(stcb); 5149 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5150 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5151 SCTP_INP_INFO_WUNLOCK(); 5152 SCTP_INP_RLOCK(inp); 5153 } 5154 #ifdef SCTP_TRACK_FREED_ASOCS 5155 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5156 /* now clean up the tasoc itself */ 5157 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5158 SCTP_DECR_ASOC_COUNT(); 5159 } else { 5160 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5161 } 5162 #else 5163 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5164 SCTP_DECR_ASOC_COUNT(); 5165 #endif 5166 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5167 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5168 /* 5169 * If its NOT the inp_free calling us AND sctp_close 5170 * as been called, we call back... 5171 */ 5172 SCTP_INP_RUNLOCK(inp); 5173 /* 5174 * This will start the kill timer (if we are the 5175 * last one) since we hold an increment yet. But 5176 * this is the only safe way to do this since 5177 * otherwise if the socket closes at the same time 5178 * we are here we might collide in the cleanup. 5179 */ 5180 sctp_inpcb_free(inp, 5181 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5182 SCTP_CALLED_DIRECTLY_NOCMPSET); 5183 SCTP_INP_DECR_REF(inp); 5184 } else { 5185 /* The socket is still open. */ 5186 SCTP_INP_DECR_REF(inp); 5187 SCTP_INP_RUNLOCK(inp); 5188 } 5189 } 5190 /* destroyed the asoc */ 5191 #ifdef SCTP_LOG_CLOSING 5192 sctp_log_closing(inp, NULL, 11); 5193 #endif 5194 return (1); 5195 } 5196 5197 5198 5199 /* 5200 * determine if a destination is "reachable" based upon the addresses bound 5201 * to the current endpoint (e.g. only v4 or v6 currently bound) 5202 */ 5203 /* 5204 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5205 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5206 * types bound as its endpoint 5207 */ 5208 int 5209 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5210 { 5211 struct sctp_inpcb *inp; 5212 int answer; 5213 5214 /* 5215 * No locks here, the TCB, in all cases is already locked and an 5216 * assoc is up. There is either a INP lock by the caller applied (in 5217 * asconf case when deleting an address) or NOT in the HB case, 5218 * however if HB then the INP increment is up and the INP will not 5219 * be removed (on top of the fact that we have a TCB lock). So we 5220 * only want to read the sctp_flags, which is either bound-all or 5221 * not.. no protection needed since once an assoc is up you can't be 5222 * changing your binding. 5223 */ 5224 inp = stcb->sctp_ep; 5225 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5226 /* if bound all, destination is not restricted */ 5227 /* 5228 * RRS: Question during lock work: Is this correct? If you 5229 * are bound-all you still might need to obey the V4--V6 5230 * flags??? IMO this bound-all stuff needs to be removed! 5231 */ 5232 return (1); 5233 } 5234 /* NOTE: all "scope" checks are done when local addresses are added */ 5235 switch (destaddr->sa_family) { 5236 #ifdef INET6 5237 case AF_INET6: 5238 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5239 break; 5240 #endif 5241 #ifdef INET 5242 case AF_INET: 5243 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5244 break; 5245 #endif 5246 default: 5247 /* invalid family, so it's unreachable */ 5248 answer = 0; 5249 break; 5250 } 5251 return (answer); 5252 } 5253 5254 /* 5255 * update the inp_vflags on an endpoint 5256 */ 5257 static void 5258 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5259 { 5260 struct sctp_laddr *laddr; 5261 5262 /* first clear the flag */ 5263 inp->ip_inp.inp.inp_vflag = 0; 5264 /* set the flag based on addresses on the ep list */ 5265 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5266 if (laddr->ifa == NULL) { 5267 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5268 __func__); 5269 continue; 5270 } 5271 5272 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5273 continue; 5274 } 5275 switch (laddr->ifa->address.sa.sa_family) { 5276 #ifdef INET6 5277 case AF_INET6: 5278 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5279 break; 5280 #endif 5281 #ifdef INET 5282 case AF_INET: 5283 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5284 break; 5285 #endif 5286 default: 5287 break; 5288 } 5289 } 5290 } 5291 5292 /* 5293 * Add the address to the endpoint local address list There is nothing to be 5294 * done if we are bound to all addresses 5295 */ 5296 void 5297 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5298 { 5299 struct sctp_laddr *laddr; 5300 struct sctp_tcb *stcb; 5301 int fnd, error = 0; 5302 5303 fnd = 0; 5304 5305 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5306 /* You are already bound to all. You have it already */ 5307 return; 5308 } 5309 #ifdef INET6 5310 if (ifa->address.sa.sa_family == AF_INET6) { 5311 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5312 /* Can't bind a non-useable addr. */ 5313 return; 5314 } 5315 } 5316 #endif 5317 /* first, is it already present? */ 5318 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5319 if (laddr->ifa == ifa) { 5320 fnd = 1; 5321 break; 5322 } 5323 } 5324 5325 if (fnd == 0) { 5326 /* Not in the ep list */ 5327 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5328 if (error != 0) 5329 return; 5330 inp->laddr_count++; 5331 /* update inp_vflag flags */ 5332 switch (ifa->address.sa.sa_family) { 5333 #ifdef INET6 5334 case AF_INET6: 5335 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5336 break; 5337 #endif 5338 #ifdef INET 5339 case AF_INET: 5340 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5341 break; 5342 #endif 5343 default: 5344 break; 5345 } 5346 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5347 sctp_add_local_addr_restricted(stcb, ifa); 5348 } 5349 } 5350 return; 5351 } 5352 5353 5354 /* 5355 * select a new (hopefully reachable) destination net (should only be used 5356 * when we deleted an ep addr that is the only usable source address to reach 5357 * the destination net) 5358 */ 5359 static void 5360 sctp_select_primary_destination(struct sctp_tcb *stcb) 5361 { 5362 struct sctp_nets *net; 5363 5364 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5365 /* for now, we'll just pick the first reachable one we find */ 5366 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5367 continue; 5368 if (sctp_destination_is_reachable(stcb, 5369 (struct sockaddr *)&net->ro._l_addr)) { 5370 /* found a reachable destination */ 5371 stcb->asoc.primary_destination = net; 5372 } 5373 } 5374 /* I can't there from here! ...we're gonna die shortly... */ 5375 } 5376 5377 5378 /* 5379 * Delete the address from the endpoint local address list. There is nothing 5380 * to be done if we are bound to all addresses 5381 */ 5382 void 5383 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5384 { 5385 struct sctp_laddr *laddr; 5386 int fnd; 5387 5388 fnd = 0; 5389 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5390 /* You are already bound to all. You have it already */ 5391 return; 5392 } 5393 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5394 if (laddr->ifa == ifa) { 5395 fnd = 1; 5396 break; 5397 } 5398 } 5399 if (fnd && (inp->laddr_count < 2)) { 5400 /* can't delete unless there are at LEAST 2 addresses */ 5401 return; 5402 } 5403 if (fnd) { 5404 /* 5405 * clean up any use of this address go through our 5406 * associations and clear any last_used_address that match 5407 * this one for each assoc, see if a new primary_destination 5408 * is needed 5409 */ 5410 struct sctp_tcb *stcb; 5411 5412 /* clean up "next_addr_touse" */ 5413 if (inp->next_addr_touse == laddr) 5414 /* delete this address */ 5415 inp->next_addr_touse = NULL; 5416 5417 /* clean up "last_used_address" */ 5418 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5419 struct sctp_nets *net; 5420 5421 SCTP_TCB_LOCK(stcb); 5422 if (stcb->asoc.last_used_address == laddr) 5423 /* delete this address */ 5424 stcb->asoc.last_used_address = NULL; 5425 /* 5426 * Now spin through all the nets and purge any ref 5427 * to laddr 5428 */ 5429 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5430 if (net->ro._s_addr == laddr->ifa) { 5431 /* Yep, purge src address selected */ 5432 RO_NHFREE(&net->ro); 5433 sctp_free_ifa(net->ro._s_addr); 5434 net->ro._s_addr = NULL; 5435 net->src_addr_selected = 0; 5436 } 5437 } 5438 SCTP_TCB_UNLOCK(stcb); 5439 } /* for each tcb */ 5440 /* remove it from the ep list */ 5441 sctp_remove_laddr(laddr); 5442 inp->laddr_count--; 5443 /* update inp_vflag flags */ 5444 sctp_update_ep_vflag(inp); 5445 } 5446 return; 5447 } 5448 5449 /* 5450 * Add the address to the TCB local address restricted list. 5451 * This is a "pending" address list (eg. addresses waiting for an 5452 * ASCONF-ACK response) and cannot be used as a valid source address. 5453 */ 5454 void 5455 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5456 { 5457 struct sctp_laddr *laddr; 5458 struct sctpladdr *list; 5459 5460 /* 5461 * Assumes TCB is locked.. and possibly the INP. May need to 5462 * confirm/fix that if we need it and is not the case. 5463 */ 5464 list = &stcb->asoc.sctp_restricted_addrs; 5465 5466 #ifdef INET6 5467 if (ifa->address.sa.sa_family == AF_INET6) { 5468 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5469 /* Can't bind a non-existent addr. */ 5470 return; 5471 } 5472 } 5473 #endif 5474 /* does the address already exist? */ 5475 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5476 if (laddr->ifa == ifa) { 5477 return; 5478 } 5479 } 5480 5481 /* add to the list */ 5482 (void)sctp_insert_laddr(list, ifa, 0); 5483 return; 5484 } 5485 5486 /* 5487 * Remove a local address from the TCB local address restricted list 5488 */ 5489 void 5490 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5491 { 5492 struct sctp_inpcb *inp; 5493 struct sctp_laddr *laddr; 5494 5495 /* 5496 * This is called by asconf work. It is assumed that a) The TCB is 5497 * locked and b) The INP is locked. This is true in as much as I can 5498 * trace through the entry asconf code where I did these locks. 5499 * Again, the ASCONF code is a bit different in that it does lock 5500 * the INP during its work often times. This must be since we don't 5501 * want other proc's looking up things while what they are looking 5502 * up is changing :-D 5503 */ 5504 5505 inp = stcb->sctp_ep; 5506 /* if subset bound and don't allow ASCONF's, can't delete last */ 5507 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5508 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5509 if (stcb->sctp_ep->laddr_count < 2) { 5510 /* can't delete last address */ 5511 return; 5512 } 5513 } 5514 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5515 /* remove the address if it exists */ 5516 if (laddr->ifa == NULL) 5517 continue; 5518 if (laddr->ifa == ifa) { 5519 sctp_remove_laddr(laddr); 5520 return; 5521 } 5522 } 5523 5524 /* address not found! */ 5525 return; 5526 } 5527 5528 /* sysctl */ 5529 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5530 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5531 5532 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5533 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5534 int *sctp_cpuarry = NULL; 5535 5536 void 5537 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5538 { 5539 /* Queue a packet to a processor for the specified core */ 5540 struct sctp_mcore_queue *qent; 5541 struct sctp_mcore_ctrl *wkq; 5542 int need_wake = 0; 5543 5544 if (sctp_mcore_workers == NULL) { 5545 /* Something went way bad during setup */ 5546 sctp_input_with_port(m, off, 0); 5547 return; 5548 } 5549 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5550 (sizeof(struct sctp_mcore_queue)), 5551 SCTP_M_MCORE); 5552 if (qent == NULL) { 5553 /* This is trouble */ 5554 sctp_input_with_port(m, off, 0); 5555 return; 5556 } 5557 qent->vn = curvnet; 5558 qent->m = m; 5559 qent->off = off; 5560 qent->v6 = 0; 5561 wkq = &sctp_mcore_workers[cpu_to_use]; 5562 SCTP_MCORE_QLOCK(wkq); 5563 5564 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5565 if (wkq->running == 0) { 5566 need_wake = 1; 5567 } 5568 SCTP_MCORE_QUNLOCK(wkq); 5569 if (need_wake) { 5570 wakeup(&wkq->running); 5571 } 5572 } 5573 5574 static void 5575 sctp_mcore_thread(void *arg) 5576 { 5577 5578 struct sctp_mcore_ctrl *wkq; 5579 struct sctp_mcore_queue *qent; 5580 5581 wkq = (struct sctp_mcore_ctrl *)arg; 5582 struct mbuf *m; 5583 int off, v6; 5584 5585 /* Wait for first tickle */ 5586 SCTP_MCORE_LOCK(wkq); 5587 wkq->running = 0; 5588 msleep(&wkq->running, 5589 &wkq->core_mtx, 5590 0, "wait for pkt", 0); 5591 SCTP_MCORE_UNLOCK(wkq); 5592 5593 /* Bind to our cpu */ 5594 thread_lock(curthread); 5595 sched_bind(curthread, wkq->cpuid); 5596 thread_unlock(curthread); 5597 5598 /* Now lets start working */ 5599 SCTP_MCORE_LOCK(wkq); 5600 /* Now grab lock and go */ 5601 for (;;) { 5602 SCTP_MCORE_QLOCK(wkq); 5603 skip_sleep: 5604 wkq->running = 1; 5605 qent = TAILQ_FIRST(&wkq->que); 5606 if (qent) { 5607 TAILQ_REMOVE(&wkq->que, qent, next); 5608 SCTP_MCORE_QUNLOCK(wkq); 5609 CURVNET_SET(qent->vn); 5610 m = qent->m; 5611 off = qent->off; 5612 v6 = qent->v6; 5613 SCTP_FREE(qent, SCTP_M_MCORE); 5614 if (v6 == 0) { 5615 sctp_input_with_port(m, off, 0); 5616 } else { 5617 SCTP_PRINTF("V6 not yet supported\n"); 5618 sctp_m_freem(m); 5619 } 5620 CURVNET_RESTORE(); 5621 SCTP_MCORE_QLOCK(wkq); 5622 } 5623 wkq->running = 0; 5624 if (!TAILQ_EMPTY(&wkq->que)) { 5625 goto skip_sleep; 5626 } 5627 SCTP_MCORE_QUNLOCK(wkq); 5628 msleep(&wkq->running, 5629 &wkq->core_mtx, 5630 0, "wait for pkt", 0); 5631 } 5632 } 5633 5634 static void 5635 sctp_startup_mcore_threads(void) 5636 { 5637 int i, cpu; 5638 5639 if (mp_ncpus == 1) 5640 return; 5641 5642 if (sctp_mcore_workers != NULL) { 5643 /* 5644 * Already been here in some previous vnet? 5645 */ 5646 return; 5647 } 5648 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5649 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5650 SCTP_M_MCORE); 5651 if (sctp_mcore_workers == NULL) { 5652 /* TSNH I hope */ 5653 return; 5654 } 5655 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5656 sizeof(struct sctp_mcore_ctrl))); 5657 /* Init the structures */ 5658 for (i = 0; i <= mp_maxid; i++) { 5659 TAILQ_INIT(&sctp_mcore_workers[i].que); 5660 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5661 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5662 sctp_mcore_workers[i].cpuid = i; 5663 } 5664 if (sctp_cpuarry == NULL) { 5665 SCTP_MALLOC(sctp_cpuarry, int *, 5666 (mp_ncpus * sizeof(int)), 5667 SCTP_M_MCORE); 5668 i = 0; 5669 CPU_FOREACH(cpu) { 5670 sctp_cpuarry[i] = cpu; 5671 i++; 5672 } 5673 } 5674 /* Now start them all */ 5675 CPU_FOREACH(cpu) { 5676 (void)kproc_create(sctp_mcore_thread, 5677 (void *)&sctp_mcore_workers[cpu], 5678 &sctp_mcore_workers[cpu].thread_proc, 5679 RFPROC, 5680 SCTP_KTHREAD_PAGES, 5681 SCTP_MCORE_NAME); 5682 } 5683 } 5684 #endif 5685 5686 void 5687 sctp_pcb_init(void) 5688 { 5689 /* 5690 * SCTP initialization for the PCB structures should be called by 5691 * the sctp_init() function. 5692 */ 5693 int i; 5694 struct timeval tv; 5695 5696 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5697 /* error I was called twice */ 5698 return; 5699 } 5700 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5701 5702 #if defined(SCTP_LOCAL_TRACE_BUF) 5703 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5704 #endif 5705 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5706 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5707 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5708 SCTP_M_MCORE); 5709 #endif 5710 (void)SCTP_GETTIME_TIMEVAL(&tv); 5711 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5712 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5713 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5714 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5715 #else 5716 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5717 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5718 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5719 #endif 5720 /* init the empty list of (All) Endpoints */ 5721 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5722 5723 5724 /* init the hash table of endpoints */ 5725 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5726 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5727 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5728 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5729 &SCTP_BASE_INFO(hashasocmark)); 5730 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5731 &SCTP_BASE_INFO(hashmark)); 5732 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5733 &SCTP_BASE_INFO(hashtcpmark)); 5734 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5735 5736 5737 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5738 &SCTP_BASE_INFO(hashvrfmark)); 5739 5740 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5741 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5742 /* init the zones */ 5743 /* 5744 * FIX ME: Should check for NULL returns, but if it does fail we are 5745 * doomed to panic anyways... add later maybe. 5746 */ 5747 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5748 sizeof(struct sctp_inpcb), maxsockets); 5749 5750 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5751 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5752 5753 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5754 sizeof(struct sctp_laddr), 5755 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5756 5757 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5758 sizeof(struct sctp_nets), 5759 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5760 5761 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5762 sizeof(struct sctp_tmit_chunk), 5763 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5764 5765 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5766 sizeof(struct sctp_queued_to_read), 5767 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5768 5769 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5770 sizeof(struct sctp_stream_queue_pending), 5771 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5772 5773 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5774 sizeof(struct sctp_asconf), 5775 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5776 5777 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5778 sizeof(struct sctp_asconf_ack), 5779 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5780 5781 5782 /* Master Lock INIT for info structure */ 5783 SCTP_INP_INFO_LOCK_INIT(); 5784 SCTP_STATLOG_INIT_LOCK(); 5785 5786 SCTP_IPI_COUNT_INIT(); 5787 SCTP_IPI_ADDR_INIT(); 5788 #ifdef SCTP_PACKET_LOGGING 5789 SCTP_IP_PKTLOG_INIT(); 5790 #endif 5791 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5792 5793 SCTP_WQ_ADDR_INIT(); 5794 /* not sure if we need all the counts */ 5795 SCTP_BASE_INFO(ipi_count_ep) = 0; 5796 /* assoc/tcb zone info */ 5797 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5798 /* local addrlist zone info */ 5799 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5800 /* remote addrlist zone info */ 5801 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5802 /* chunk info */ 5803 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5804 5805 /* socket queue zone info */ 5806 SCTP_BASE_INFO(ipi_count_readq) = 0; 5807 5808 /* stream out queue cont */ 5809 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5810 5811 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5812 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5813 5814 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5815 5816 /* Init the TIMEWAIT list */ 5817 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5818 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5819 } 5820 sctp_startup_iterator(); 5821 5822 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5823 sctp_startup_mcore_threads(); 5824 #endif 5825 5826 /* 5827 * INIT the default VRF which for BSD is the only one, other O/S's 5828 * may have more. But initially they must start with one and then 5829 * add the VRF's as addresses are added. 5830 */ 5831 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5832 } 5833 5834 /* 5835 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5836 */ 5837 void 5838 sctp_pcb_finish(void) 5839 { 5840 struct sctp_vrflist *vrf_bucket; 5841 struct sctp_vrf *vrf, *nvrf; 5842 struct sctp_ifn *ifn, *nifn; 5843 struct sctp_ifa *ifa, *nifa; 5844 struct sctpvtaghead *chain; 5845 struct sctp_tagblock *twait_block, *prev_twait_block; 5846 struct sctp_laddr *wi, *nwi; 5847 int i; 5848 struct sctp_iterator *it, *nit; 5849 5850 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5851 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5852 return; 5853 } 5854 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5855 /* 5856 * In FreeBSD the iterator thread never exits but we do clean up. 5857 * The only way FreeBSD reaches here is if we have VRF's but we 5858 * still add the ifdef to make it compile on old versions. 5859 */ 5860 retry: 5861 SCTP_IPI_ITERATOR_WQ_LOCK(); 5862 /* 5863 * sctp_iterator_worker() might be working on an it entry without 5864 * holding the lock. We won't find it on the list either and 5865 * continue and free/destroy it. While holding the lock, spin, to 5866 * avoid the race condition as sctp_iterator_worker() will have to 5867 * wait to re-acquire the lock. 5868 */ 5869 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5870 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5871 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5872 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5873 DELAY(10); 5874 goto retry; 5875 } 5876 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5877 if (it->vn != curvnet) { 5878 continue; 5879 } 5880 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5881 if (it->function_atend != NULL) { 5882 (*it->function_atend) (it->pointer, it->val); 5883 } 5884 SCTP_FREE(it, SCTP_M_ITER); 5885 } 5886 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5887 SCTP_ITERATOR_LOCK(); 5888 if ((sctp_it_ctl.cur_it) && 5889 (sctp_it_ctl.cur_it->vn == curvnet)) { 5890 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5891 } 5892 SCTP_ITERATOR_UNLOCK(); 5893 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5894 SCTP_WQ_ADDR_LOCK(); 5895 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5896 LIST_REMOVE(wi, sctp_nxt_addr); 5897 SCTP_DECR_LADDR_COUNT(); 5898 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5899 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5900 } 5901 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5902 } 5903 SCTP_WQ_ADDR_UNLOCK(); 5904 5905 /* 5906 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5907 * destroyed first). 5908 */ 5909 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5910 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5911 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5912 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5913 /* free the ifa */ 5914 LIST_REMOVE(ifa, next_bucket); 5915 LIST_REMOVE(ifa, next_ifa); 5916 SCTP_FREE(ifa, SCTP_M_IFA); 5917 } 5918 /* free the ifn */ 5919 LIST_REMOVE(ifn, next_bucket); 5920 LIST_REMOVE(ifn, next_ifn); 5921 SCTP_FREE(ifn, SCTP_M_IFN); 5922 } 5923 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5924 /* free the vrf */ 5925 LIST_REMOVE(vrf, next_vrf); 5926 SCTP_FREE(vrf, SCTP_M_VRF); 5927 } 5928 /* free the vrf hashes */ 5929 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5930 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5931 5932 /* 5933 * free the TIMEWAIT list elements malloc'd in the function 5934 * sctp_add_vtag_to_timewait()... 5935 */ 5936 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5937 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5938 if (!LIST_EMPTY(chain)) { 5939 prev_twait_block = NULL; 5940 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5941 if (prev_twait_block) { 5942 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5943 } 5944 prev_twait_block = twait_block; 5945 } 5946 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5947 } 5948 } 5949 5950 /* free the locks and mutexes */ 5951 #ifdef SCTP_PACKET_LOGGING 5952 SCTP_IP_PKTLOG_DESTROY(); 5953 #endif 5954 SCTP_IPI_ADDR_DESTROY(); 5955 SCTP_STATLOG_DESTROY(); 5956 SCTP_INP_INFO_LOCK_DESTROY(); 5957 5958 SCTP_WQ_ADDR_DESTROY(); 5959 5960 /* Get rid of other stuff too. */ 5961 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5962 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5963 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5964 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5965 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5966 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5967 5968 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5969 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5970 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5971 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5972 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5973 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5974 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5975 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5976 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5977 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5978 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5979 #endif 5980 } 5981 5982 5983 int 5984 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5985 int offset, int limit, 5986 struct sockaddr *src, struct sockaddr *dst, 5987 struct sockaddr *altsa, uint16_t port) 5988 { 5989 /* 5990 * grub through the INIT pulling addresses and loading them to the 5991 * nets structure in the asoc. The from address in the mbuf should 5992 * also be loaded (if it is not already). This routine can be called 5993 * with either INIT or INIT-ACK's as long as the m points to the IP 5994 * packet and the offset points to the beginning of the parameters. 5995 */ 5996 struct sctp_inpcb *inp; 5997 struct sctp_nets *net, *nnet, *net_tmp; 5998 struct sctp_paramhdr *phdr, param_buf; 5999 struct sctp_tcb *stcb_tmp; 6000 uint16_t ptype, plen; 6001 struct sockaddr *sa; 6002 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6003 struct sctp_auth_random *p_random = NULL; 6004 uint16_t random_len = 0; 6005 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6006 struct sctp_auth_hmac_algo *hmacs = NULL; 6007 uint16_t hmacs_len = 0; 6008 uint8_t saw_asconf = 0; 6009 uint8_t saw_asconf_ack = 0; 6010 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6011 struct sctp_auth_chunk_list *chunks = NULL; 6012 uint16_t num_chunks = 0; 6013 sctp_key_t *new_key; 6014 uint32_t keylen; 6015 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6016 uint8_t peer_supports_ecn; 6017 uint8_t peer_supports_prsctp; 6018 uint8_t peer_supports_auth; 6019 uint8_t peer_supports_asconf; 6020 uint8_t peer_supports_asconf_ack; 6021 uint8_t peer_supports_reconfig; 6022 uint8_t peer_supports_nrsack; 6023 uint8_t peer_supports_pktdrop; 6024 uint8_t peer_supports_idata; 6025 #ifdef INET 6026 struct sockaddr_in sin; 6027 #endif 6028 #ifdef INET6 6029 struct sockaddr_in6 sin6; 6030 #endif 6031 6032 /* First get the destination address setup too. */ 6033 #ifdef INET 6034 memset(&sin, 0, sizeof(sin)); 6035 sin.sin_family = AF_INET; 6036 sin.sin_len = sizeof(sin); 6037 sin.sin_port = stcb->rport; 6038 #endif 6039 #ifdef INET6 6040 memset(&sin6, 0, sizeof(sin6)); 6041 sin6.sin6_family = AF_INET6; 6042 sin6.sin6_len = sizeof(struct sockaddr_in6); 6043 sin6.sin6_port = stcb->rport; 6044 #endif 6045 if (altsa) { 6046 sa = altsa; 6047 } else { 6048 sa = src; 6049 } 6050 peer_supports_idata = 0; 6051 peer_supports_ecn = 0; 6052 peer_supports_prsctp = 0; 6053 peer_supports_auth = 0; 6054 peer_supports_asconf = 0; 6055 peer_supports_reconfig = 0; 6056 peer_supports_nrsack = 0; 6057 peer_supports_pktdrop = 0; 6058 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6059 /* mark all addresses that we have currently on the list */ 6060 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6061 } 6062 /* does the source address already exist? if so skip it */ 6063 inp = stcb->sctp_ep; 6064 atomic_add_int(&stcb->asoc.refcnt, 1); 6065 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6066 atomic_add_int(&stcb->asoc.refcnt, -1); 6067 6068 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6069 /* we must add the source address */ 6070 /* no scope set here since we have a tcb already. */ 6071 switch (sa->sa_family) { 6072 #ifdef INET 6073 case AF_INET: 6074 if (stcb->asoc.scope.ipv4_addr_legal) { 6075 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6076 return (-1); 6077 } 6078 } 6079 break; 6080 #endif 6081 #ifdef INET6 6082 case AF_INET6: 6083 if (stcb->asoc.scope.ipv6_addr_legal) { 6084 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6085 return (-2); 6086 } 6087 } 6088 break; 6089 #endif 6090 default: 6091 break; 6092 } 6093 } else { 6094 if (net_tmp != NULL && stcb_tmp == stcb) { 6095 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6096 } else if (stcb_tmp != stcb) { 6097 /* It belongs to another association? */ 6098 if (stcb_tmp) 6099 SCTP_TCB_UNLOCK(stcb_tmp); 6100 return (-3); 6101 } 6102 } 6103 if (stcb->asoc.state == 0) { 6104 /* the assoc was freed? */ 6105 return (-4); 6106 } 6107 /* now we must go through each of the params. */ 6108 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6109 while (phdr) { 6110 ptype = ntohs(phdr->param_type); 6111 plen = ntohs(phdr->param_length); 6112 /* 6113 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6114 * (uint32_t)ptype, (int)plen); 6115 */ 6116 if (offset + plen > limit) { 6117 break; 6118 } 6119 if (plen < sizeof(struct sctp_paramhdr)) { 6120 break; 6121 } 6122 #ifdef INET 6123 if (ptype == SCTP_IPV4_ADDRESS) { 6124 if (stcb->asoc.scope.ipv4_addr_legal) { 6125 struct sctp_ipv4addr_param *p4, p4_buf; 6126 6127 /* ok get the v4 address and check/add */ 6128 phdr = sctp_get_next_param(m, offset, 6129 (struct sctp_paramhdr *)&p4_buf, 6130 sizeof(p4_buf)); 6131 if (plen != sizeof(struct sctp_ipv4addr_param) || 6132 phdr == NULL) { 6133 return (-5); 6134 } 6135 p4 = (struct sctp_ipv4addr_param *)phdr; 6136 sin.sin_addr.s_addr = p4->addr; 6137 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6138 /* Skip multi-cast addresses */ 6139 goto next_param; 6140 } 6141 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6142 (sin.sin_addr.s_addr == INADDR_ANY)) { 6143 goto next_param; 6144 } 6145 sa = (struct sockaddr *)&sin; 6146 inp = stcb->sctp_ep; 6147 atomic_add_int(&stcb->asoc.refcnt, 1); 6148 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6149 dst, stcb); 6150 atomic_add_int(&stcb->asoc.refcnt, -1); 6151 6152 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6153 inp == NULL) { 6154 /* we must add the source address */ 6155 /* 6156 * no scope set since we have a tcb 6157 * already 6158 */ 6159 6160 /* 6161 * we must validate the state again 6162 * here 6163 */ 6164 add_it_now: 6165 if (stcb->asoc.state == 0) { 6166 /* the assoc was freed? */ 6167 return (-7); 6168 } 6169 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6170 return (-8); 6171 } 6172 } else if (stcb_tmp == stcb) { 6173 if (stcb->asoc.state == 0) { 6174 /* the assoc was freed? */ 6175 return (-10); 6176 } 6177 if (net != NULL) { 6178 /* clear flag */ 6179 net->dest_state &= 6180 ~SCTP_ADDR_NOT_IN_ASSOC; 6181 } 6182 } else { 6183 /* 6184 * strange, address is in another 6185 * assoc? straighten out locks. 6186 */ 6187 if (stcb_tmp) { 6188 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6189 struct mbuf *op_err; 6190 char msg[SCTP_DIAG_INFO_LEN]; 6191 6192 /* 6193 * in setup state we 6194 * abort this guy 6195 */ 6196 SCTP_SNPRINTF(msg, sizeof(msg), 6197 "%s:%d at %s", __FILE__, __LINE__, __func__); 6198 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6199 msg); 6200 sctp_abort_an_association(stcb_tmp->sctp_ep, 6201 stcb_tmp, op_err, 6202 SCTP_SO_NOT_LOCKED); 6203 goto add_it_now; 6204 } 6205 SCTP_TCB_UNLOCK(stcb_tmp); 6206 } 6207 6208 if (stcb->asoc.state == 0) { 6209 /* the assoc was freed? */ 6210 return (-12); 6211 } 6212 return (-13); 6213 } 6214 } 6215 } else 6216 #endif 6217 #ifdef INET6 6218 if (ptype == SCTP_IPV6_ADDRESS) { 6219 if (stcb->asoc.scope.ipv6_addr_legal) { 6220 /* ok get the v6 address and check/add */ 6221 struct sctp_ipv6addr_param *p6, p6_buf; 6222 6223 phdr = sctp_get_next_param(m, offset, 6224 (struct sctp_paramhdr *)&p6_buf, 6225 sizeof(p6_buf)); 6226 if (plen != sizeof(struct sctp_ipv6addr_param) || 6227 phdr == NULL) { 6228 return (-14); 6229 } 6230 p6 = (struct sctp_ipv6addr_param *)phdr; 6231 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6232 sizeof(p6->addr)); 6233 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6234 /* Skip multi-cast addresses */ 6235 goto next_param; 6236 } 6237 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6238 /* 6239 * Link local make no sense without 6240 * scope 6241 */ 6242 goto next_param; 6243 } 6244 sa = (struct sockaddr *)&sin6; 6245 inp = stcb->sctp_ep; 6246 atomic_add_int(&stcb->asoc.refcnt, 1); 6247 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6248 dst, stcb); 6249 atomic_add_int(&stcb->asoc.refcnt, -1); 6250 if (stcb_tmp == NULL && 6251 (inp == stcb->sctp_ep || inp == NULL)) { 6252 /* 6253 * we must validate the state again 6254 * here 6255 */ 6256 add_it_now6: 6257 if (stcb->asoc.state == 0) { 6258 /* the assoc was freed? */ 6259 return (-16); 6260 } 6261 /* 6262 * we must add the address, no scope 6263 * set 6264 */ 6265 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6266 return (-17); 6267 } 6268 } else if (stcb_tmp == stcb) { 6269 /* 6270 * we must validate the state again 6271 * here 6272 */ 6273 if (stcb->asoc.state == 0) { 6274 /* the assoc was freed? */ 6275 return (-19); 6276 } 6277 if (net != NULL) { 6278 /* clear flag */ 6279 net->dest_state &= 6280 ~SCTP_ADDR_NOT_IN_ASSOC; 6281 } 6282 } else { 6283 /* 6284 * strange, address is in another 6285 * assoc? straighten out locks. 6286 */ 6287 if (stcb_tmp) { 6288 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6289 struct mbuf *op_err; 6290 char msg[SCTP_DIAG_INFO_LEN]; 6291 6292 /* 6293 * in setup state we 6294 * abort this guy 6295 */ 6296 SCTP_SNPRINTF(msg, sizeof(msg), 6297 "%s:%d at %s", __FILE__, __LINE__, __func__); 6298 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6299 msg); 6300 sctp_abort_an_association(stcb_tmp->sctp_ep, 6301 stcb_tmp, op_err, 6302 SCTP_SO_NOT_LOCKED); 6303 goto add_it_now6; 6304 } 6305 SCTP_TCB_UNLOCK(stcb_tmp); 6306 } 6307 if (stcb->asoc.state == 0) { 6308 /* the assoc was freed? */ 6309 return (-21); 6310 } 6311 return (-22); 6312 } 6313 } 6314 } else 6315 #endif 6316 if (ptype == SCTP_ECN_CAPABLE) { 6317 peer_supports_ecn = 1; 6318 } else if (ptype == SCTP_ULP_ADAPTATION) { 6319 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6320 struct sctp_adaptation_layer_indication ai, 6321 *aip; 6322 6323 phdr = sctp_get_next_param(m, offset, 6324 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6325 aip = (struct sctp_adaptation_layer_indication *)phdr; 6326 if (aip) { 6327 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6328 stcb->asoc.adaptation_needed = 1; 6329 } 6330 } 6331 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6332 struct sctp_asconf_addr_param lstore, *fee; 6333 int lptype; 6334 struct sockaddr *lsa = NULL; 6335 #ifdef INET 6336 struct sctp_asconf_addrv4_param *fii; 6337 #endif 6338 6339 if (stcb->asoc.asconf_supported == 0) { 6340 return (-100); 6341 } 6342 if (plen > sizeof(lstore)) { 6343 return (-23); 6344 } 6345 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6346 return (-101); 6347 } 6348 phdr = sctp_get_next_param(m, offset, 6349 (struct sctp_paramhdr *)&lstore, 6350 plen); 6351 if (phdr == NULL) { 6352 return (-24); 6353 } 6354 fee = (struct sctp_asconf_addr_param *)phdr; 6355 lptype = ntohs(fee->addrp.ph.param_type); 6356 switch (lptype) { 6357 #ifdef INET 6358 case SCTP_IPV4_ADDRESS: 6359 if (plen != 6360 sizeof(struct sctp_asconf_addrv4_param)) { 6361 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6362 (int)sizeof(struct sctp_asconf_addrv4_param), 6363 plen); 6364 } else { 6365 fii = (struct sctp_asconf_addrv4_param *)fee; 6366 sin.sin_addr.s_addr = fii->addrp.addr; 6367 lsa = (struct sockaddr *)&sin; 6368 } 6369 break; 6370 #endif 6371 #ifdef INET6 6372 case SCTP_IPV6_ADDRESS: 6373 if (plen != 6374 sizeof(struct sctp_asconf_addr_param)) { 6375 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6376 (int)sizeof(struct sctp_asconf_addr_param), 6377 plen); 6378 } else { 6379 memcpy(sin6.sin6_addr.s6_addr, 6380 fee->addrp.addr, 6381 sizeof(fee->addrp.addr)); 6382 lsa = (struct sockaddr *)&sin6; 6383 } 6384 break; 6385 #endif 6386 default: 6387 break; 6388 } 6389 if (lsa) { 6390 (void)sctp_set_primary_addr(stcb, sa, NULL); 6391 } 6392 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6393 stcb->asoc.peer_supports_nat = 1; 6394 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6395 /* Peer supports pr-sctp */ 6396 peer_supports_prsctp = 1; 6397 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6398 /* A supported extension chunk */ 6399 struct sctp_supported_chunk_types_param *pr_supported; 6400 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6401 int num_ent, i; 6402 6403 if (plen > sizeof(local_store)) { 6404 return (-35); 6405 } 6406 phdr = sctp_get_next_param(m, offset, 6407 (struct sctp_paramhdr *)&local_store, plen); 6408 if (phdr == NULL) { 6409 return (-25); 6410 } 6411 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6412 num_ent = plen - sizeof(struct sctp_paramhdr); 6413 for (i = 0; i < num_ent; i++) { 6414 switch (pr_supported->chunk_types[i]) { 6415 case SCTP_ASCONF: 6416 peer_supports_asconf = 1; 6417 break; 6418 case SCTP_ASCONF_ACK: 6419 peer_supports_asconf_ack = 1; 6420 break; 6421 case SCTP_FORWARD_CUM_TSN: 6422 peer_supports_prsctp = 1; 6423 break; 6424 case SCTP_PACKET_DROPPED: 6425 peer_supports_pktdrop = 1; 6426 break; 6427 case SCTP_NR_SELECTIVE_ACK: 6428 peer_supports_nrsack = 1; 6429 break; 6430 case SCTP_STREAM_RESET: 6431 peer_supports_reconfig = 1; 6432 break; 6433 case SCTP_AUTHENTICATION: 6434 peer_supports_auth = 1; 6435 break; 6436 case SCTP_IDATA: 6437 peer_supports_idata = 1; 6438 break; 6439 default: 6440 /* one I have not learned yet */ 6441 break; 6442 6443 } 6444 } 6445 } else if (ptype == SCTP_RANDOM) { 6446 if (plen > sizeof(random_store)) 6447 break; 6448 if (got_random) { 6449 /* already processed a RANDOM */ 6450 goto next_param; 6451 } 6452 phdr = sctp_get_next_param(m, offset, 6453 (struct sctp_paramhdr *)random_store, 6454 plen); 6455 if (phdr == NULL) 6456 return (-26); 6457 p_random = (struct sctp_auth_random *)phdr; 6458 random_len = plen - sizeof(*p_random); 6459 /* enforce the random length */ 6460 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6461 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6462 return (-27); 6463 } 6464 got_random = 1; 6465 } else if (ptype == SCTP_HMAC_LIST) { 6466 uint16_t num_hmacs; 6467 uint16_t i; 6468 6469 if (plen > sizeof(hmacs_store)) 6470 break; 6471 if (got_hmacs) { 6472 /* already processed a HMAC list */ 6473 goto next_param; 6474 } 6475 phdr = sctp_get_next_param(m, offset, 6476 (struct sctp_paramhdr *)hmacs_store, 6477 plen); 6478 if (phdr == NULL) 6479 return (-28); 6480 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6481 hmacs_len = plen - sizeof(*hmacs); 6482 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6483 /* validate the hmac list */ 6484 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6485 return (-29); 6486 } 6487 if (stcb->asoc.peer_hmacs != NULL) 6488 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6489 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6490 if (stcb->asoc.peer_hmacs != NULL) { 6491 for (i = 0; i < num_hmacs; i++) { 6492 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6493 ntohs(hmacs->hmac_ids[i])); 6494 } 6495 } 6496 got_hmacs = 1; 6497 } else if (ptype == SCTP_CHUNK_LIST) { 6498 int i; 6499 6500 if (plen > sizeof(chunks_store)) 6501 break; 6502 if (got_chklist) { 6503 /* already processed a Chunks list */ 6504 goto next_param; 6505 } 6506 phdr = sctp_get_next_param(m, offset, 6507 (struct sctp_paramhdr *)chunks_store, 6508 plen); 6509 if (phdr == NULL) 6510 return (-30); 6511 chunks = (struct sctp_auth_chunk_list *)phdr; 6512 num_chunks = plen - sizeof(*chunks); 6513 if (stcb->asoc.peer_auth_chunks != NULL) 6514 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6515 else 6516 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6517 for (i = 0; i < num_chunks; i++) { 6518 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6519 stcb->asoc.peer_auth_chunks); 6520 /* record asconf/asconf-ack if listed */ 6521 if (chunks->chunk_types[i] == SCTP_ASCONF) 6522 saw_asconf = 1; 6523 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6524 saw_asconf_ack = 1; 6525 6526 } 6527 got_chklist = 1; 6528 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6529 (ptype == SCTP_STATE_COOKIE) || 6530 (ptype == SCTP_UNRECOG_PARAM) || 6531 (ptype == SCTP_COOKIE_PRESERVE) || 6532 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6533 (ptype == SCTP_ADD_IP_ADDRESS) || 6534 (ptype == SCTP_DEL_IP_ADDRESS) || 6535 (ptype == SCTP_ERROR_CAUSE_IND) || 6536 (ptype == SCTP_SUCCESS_REPORT)) { 6537 /* don't care */ ; 6538 } else { 6539 if ((ptype & 0x8000) == 0x0000) { 6540 /* 6541 * must stop processing the rest of the 6542 * param's. Any report bits were handled 6543 * with the call to 6544 * sctp_arethere_unrecognized_parameters() 6545 * when the INIT or INIT-ACK was first seen. 6546 */ 6547 break; 6548 } 6549 } 6550 6551 next_param: 6552 offset += SCTP_SIZE32(plen); 6553 if (offset >= limit) { 6554 break; 6555 } 6556 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6557 sizeof(param_buf)); 6558 } 6559 /* Now check to see if we need to purge any addresses */ 6560 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6561 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6562 SCTP_ADDR_NOT_IN_ASSOC) { 6563 /* This address has been removed from the asoc */ 6564 /* remove and free it */ 6565 stcb->asoc.numnets--; 6566 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6567 sctp_free_remote_addr(net); 6568 if (net == stcb->asoc.primary_destination) { 6569 stcb->asoc.primary_destination = NULL; 6570 sctp_select_primary_destination(stcb); 6571 } 6572 } 6573 } 6574 if ((stcb->asoc.ecn_supported == 1) && 6575 (peer_supports_ecn == 0)) { 6576 stcb->asoc.ecn_supported = 0; 6577 } 6578 if ((stcb->asoc.prsctp_supported == 1) && 6579 (peer_supports_prsctp == 0)) { 6580 stcb->asoc.prsctp_supported = 0; 6581 } 6582 if ((stcb->asoc.auth_supported == 1) && 6583 ((peer_supports_auth == 0) || 6584 (got_random == 0) || (got_hmacs == 0))) { 6585 stcb->asoc.auth_supported = 0; 6586 } 6587 if ((stcb->asoc.asconf_supported == 1) && 6588 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6589 (stcb->asoc.auth_supported == 0) || 6590 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6591 stcb->asoc.asconf_supported = 0; 6592 } 6593 if ((stcb->asoc.reconfig_supported == 1) && 6594 (peer_supports_reconfig == 0)) { 6595 stcb->asoc.reconfig_supported = 0; 6596 } 6597 if ((stcb->asoc.idata_supported == 1) && 6598 (peer_supports_idata == 0)) { 6599 stcb->asoc.idata_supported = 0; 6600 } 6601 if ((stcb->asoc.nrsack_supported == 1) && 6602 (peer_supports_nrsack == 0)) { 6603 stcb->asoc.nrsack_supported = 0; 6604 } 6605 if ((stcb->asoc.pktdrop_supported == 1) && 6606 (peer_supports_pktdrop == 0)) { 6607 stcb->asoc.pktdrop_supported = 0; 6608 } 6609 /* validate authentication required parameters */ 6610 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6611 /* peer does not support auth but sent a chunks list? */ 6612 return (-31); 6613 } 6614 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6615 /* peer supports asconf but not auth? */ 6616 return (-32); 6617 } else if ((peer_supports_asconf == 1) && 6618 (peer_supports_auth == 1) && 6619 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6620 return (-33); 6621 } 6622 /* concatenate the full random key */ 6623 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6624 if (chunks != NULL) { 6625 keylen += sizeof(*chunks) + num_chunks; 6626 } 6627 new_key = sctp_alloc_key(keylen); 6628 if (new_key != NULL) { 6629 /* copy in the RANDOM */ 6630 if (p_random != NULL) { 6631 keylen = sizeof(*p_random) + random_len; 6632 memcpy(new_key->key, p_random, keylen); 6633 } else { 6634 keylen = 0; 6635 } 6636 /* append in the AUTH chunks */ 6637 if (chunks != NULL) { 6638 memcpy(new_key->key + keylen, chunks, 6639 sizeof(*chunks) + num_chunks); 6640 keylen += sizeof(*chunks) + num_chunks; 6641 } 6642 /* append in the HMACs */ 6643 if (hmacs != NULL) { 6644 memcpy(new_key->key + keylen, hmacs, 6645 sizeof(*hmacs) + hmacs_len); 6646 } 6647 } else { 6648 /* failed to get memory for the key */ 6649 return (-34); 6650 } 6651 if (stcb->asoc.authinfo.peer_random != NULL) 6652 sctp_free_key(stcb->asoc.authinfo.peer_random); 6653 stcb->asoc.authinfo.peer_random = new_key; 6654 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6655 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6656 6657 return (0); 6658 } 6659 6660 int 6661 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6662 struct sctp_nets *net) 6663 { 6664 /* make sure the requested primary address exists in the assoc */ 6665 if (net == NULL && sa) 6666 net = sctp_findnet(stcb, sa); 6667 6668 if (net == NULL) { 6669 /* didn't find the requested primary address! */ 6670 return (-1); 6671 } else { 6672 /* set the primary address */ 6673 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6674 /* Must be confirmed, so queue to set */ 6675 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6676 return (0); 6677 } 6678 stcb->asoc.primary_destination = net; 6679 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6680 sctp_free_remote_addr(stcb->asoc.alternate); 6681 stcb->asoc.alternate = NULL; 6682 } 6683 net = TAILQ_FIRST(&stcb->asoc.nets); 6684 if (net != stcb->asoc.primary_destination) { 6685 /* 6686 * first one on the list is NOT the primary 6687 * sctp_cmpaddr() is much more efficient if the 6688 * primary is the first on the list, make it so. 6689 */ 6690 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6691 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6692 } 6693 return (0); 6694 } 6695 } 6696 6697 int 6698 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6699 { 6700 /* 6701 * This function serves two purposes. It will see if a TAG can be 6702 * re-used and return 1 for yes it is ok and 0 for don't use that 6703 * tag. A secondary function it will do is purge out old tags that 6704 * can be removed. 6705 */ 6706 struct sctpvtaghead *chain; 6707 struct sctp_tagblock *twait_block; 6708 struct sctpasochead *head; 6709 struct sctp_tcb *stcb; 6710 int i; 6711 6712 SCTP_INP_INFO_RLOCK(); 6713 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6714 SCTP_BASE_INFO(hashasocmark))]; 6715 LIST_FOREACH(stcb, head, sctp_asocs) { 6716 /* 6717 * We choose not to lock anything here. TCB's can't be 6718 * removed since we have the read lock, so they can't be 6719 * freed on us, same thing for the INP. I may be wrong with 6720 * this assumption, but we will go with it for now :-) 6721 */ 6722 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6723 continue; 6724 } 6725 if (stcb->asoc.my_vtag == tag) { 6726 /* candidate */ 6727 if (stcb->rport != rport) { 6728 continue; 6729 } 6730 if (stcb->sctp_ep->sctp_lport != lport) { 6731 continue; 6732 } 6733 /* Its a used tag set */ 6734 SCTP_INP_INFO_RUNLOCK(); 6735 return (0); 6736 } 6737 } 6738 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6739 /* Now what about timed wait ? */ 6740 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6741 /* 6742 * Block(s) are present, lets see if we have this tag in the 6743 * list 6744 */ 6745 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6746 if (twait_block->vtag_block[i].v_tag == 0) { 6747 /* not used */ 6748 continue; 6749 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6750 now->tv_sec) { 6751 /* Audit expires this guy */ 6752 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6753 twait_block->vtag_block[i].v_tag = 0; 6754 twait_block->vtag_block[i].lport = 0; 6755 twait_block->vtag_block[i].rport = 0; 6756 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6757 (twait_block->vtag_block[i].lport == lport) && 6758 (twait_block->vtag_block[i].rport == rport)) { 6759 /* Bad tag, sorry :< */ 6760 SCTP_INP_INFO_RUNLOCK(); 6761 return (0); 6762 } 6763 } 6764 } 6765 SCTP_INP_INFO_RUNLOCK(); 6766 return (1); 6767 } 6768 6769 static void 6770 sctp_drain_mbufs(struct sctp_tcb *stcb) 6771 { 6772 /* 6773 * We must hunt this association for MBUF's past the cumack (i.e. 6774 * out of order data that we can renege on). 6775 */ 6776 struct sctp_association *asoc; 6777 struct sctp_tmit_chunk *chk, *nchk; 6778 uint32_t cumulative_tsn_p1; 6779 struct sctp_queued_to_read *control, *ncontrol; 6780 int cnt, strmat; 6781 uint32_t gap, i; 6782 int fnd = 0; 6783 6784 /* We look for anything larger than the cum-ack + 1 */ 6785 6786 asoc = &stcb->asoc; 6787 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6788 /* none we can reneg on. */ 6789 return; 6790 } 6791 SCTP_STAT_INCR(sctps_protocol_drains_done); 6792 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6793 cnt = 0; 6794 /* Ok that was fun, now we will drain all the inbound streams? */ 6795 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6796 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6797 #ifdef INVARIANTS 6798 if (control->on_strm_q != SCTP_ON_ORDERED) { 6799 panic("Huh control: %p on_q: %d -- not ordered?", 6800 control, control->on_strm_q); 6801 } 6802 #endif 6803 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6804 /* Yep it is above cum-ack */ 6805 cnt++; 6806 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6807 KASSERT(control->length > 0, ("control has zero length")); 6808 if (asoc->size_on_all_streams >= control->length) { 6809 asoc->size_on_all_streams -= control->length; 6810 } else { 6811 #ifdef INVARIANTS 6812 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6813 #else 6814 asoc->size_on_all_streams = 0; 6815 #endif 6816 } 6817 sctp_ucount_decr(asoc->cnt_on_all_streams); 6818 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6819 if (control->on_read_q) { 6820 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6821 control->on_read_q = 0; 6822 } 6823 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6824 control->on_strm_q = 0; 6825 if (control->data) { 6826 sctp_m_freem(control->data); 6827 control->data = NULL; 6828 } 6829 sctp_free_remote_addr(control->whoFrom); 6830 /* Now its reasm? */ 6831 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6832 cnt++; 6833 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6834 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6835 if (asoc->size_on_reasm_queue >= chk->send_size) { 6836 asoc->size_on_reasm_queue -= chk->send_size; 6837 } else { 6838 #ifdef INVARIANTS 6839 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6840 #else 6841 asoc->size_on_reasm_queue = 0; 6842 #endif 6843 } 6844 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6845 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6846 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6847 if (chk->data) { 6848 sctp_m_freem(chk->data); 6849 chk->data = NULL; 6850 } 6851 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6852 } 6853 sctp_free_a_readq(stcb, control); 6854 } 6855 } 6856 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6857 #ifdef INVARIANTS 6858 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6859 panic("Huh control: %p on_q: %d -- not unordered?", 6860 control, control->on_strm_q); 6861 } 6862 #endif 6863 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6864 /* Yep it is above cum-ack */ 6865 cnt++; 6866 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6867 KASSERT(control->length > 0, ("control has zero length")); 6868 if (asoc->size_on_all_streams >= control->length) { 6869 asoc->size_on_all_streams -= control->length; 6870 } else { 6871 #ifdef INVARIANTS 6872 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6873 #else 6874 asoc->size_on_all_streams = 0; 6875 #endif 6876 } 6877 sctp_ucount_decr(asoc->cnt_on_all_streams); 6878 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6879 if (control->on_read_q) { 6880 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6881 control->on_read_q = 0; 6882 } 6883 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6884 control->on_strm_q = 0; 6885 if (control->data) { 6886 sctp_m_freem(control->data); 6887 control->data = NULL; 6888 } 6889 sctp_free_remote_addr(control->whoFrom); 6890 /* Now its reasm? */ 6891 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6892 cnt++; 6893 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6894 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6895 if (asoc->size_on_reasm_queue >= chk->send_size) { 6896 asoc->size_on_reasm_queue -= chk->send_size; 6897 } else { 6898 #ifdef INVARIANTS 6899 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6900 #else 6901 asoc->size_on_reasm_queue = 0; 6902 #endif 6903 } 6904 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6905 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6906 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6907 if (chk->data) { 6908 sctp_m_freem(chk->data); 6909 chk->data = NULL; 6910 } 6911 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6912 } 6913 sctp_free_a_readq(stcb, control); 6914 } 6915 } 6916 } 6917 if (cnt) { 6918 /* We must back down to see what the new highest is */ 6919 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6920 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6921 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6922 asoc->highest_tsn_inside_map = i; 6923 fnd = 1; 6924 break; 6925 } 6926 } 6927 if (!fnd) { 6928 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6929 } 6930 6931 /* 6932 * Question, should we go through the delivery queue? The 6933 * only reason things are on here is the app not reading OR 6934 * a p-d-api up. An attacker COULD send enough in to 6935 * initiate the PD-API and then send a bunch of stuff to 6936 * other streams... these would wind up on the delivery 6937 * queue.. and then we would not get to them. But in order 6938 * to do this I then have to back-track and un-deliver 6939 * sequence numbers in streams.. el-yucko. I think for now 6940 * we will NOT look at the delivery queue and leave it to be 6941 * something to consider later. An alternative would be to 6942 * abort the P-D-API with a notification and then deliver 6943 * the data.... Or another method might be to keep track of 6944 * how many times the situation occurs and if we see a 6945 * possible attack underway just abort the association. 6946 */ 6947 #ifdef SCTP_DEBUG 6948 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6949 #endif 6950 /* 6951 * Now do we need to find a new 6952 * asoc->highest_tsn_inside_map? 6953 */ 6954 asoc->last_revoke_count = cnt; 6955 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6956 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6957 /* sa_ignore NO_NULL_CHK */ 6958 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6959 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6960 } 6961 /* 6962 * Another issue, in un-setting the TSN's in the mapping array we 6963 * DID NOT adjust the highest_tsn marker. This will cause one of 6964 * two things to occur. It may cause us to do extra work in checking 6965 * for our mapping array movement. More importantly it may cause us 6966 * to SACK every datagram. This may not be a bad thing though since 6967 * we will recover once we get our cum-ack above and all this stuff 6968 * we dumped recovered. 6969 */ 6970 } 6971 6972 void 6973 sctp_drain() 6974 { 6975 /* 6976 * We must walk the PCB lists for ALL associations here. The system 6977 * is LOW on MBUF's and needs help. This is where reneging will 6978 * occur. We really hope this does NOT happen! 6979 */ 6980 VNET_ITERATOR_DECL(vnet_iter); 6981 VNET_LIST_RLOCK_NOSLEEP(); 6982 VNET_FOREACH(vnet_iter) { 6983 CURVNET_SET(vnet_iter); 6984 struct sctp_inpcb *inp; 6985 struct sctp_tcb *stcb; 6986 6987 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6988 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6989 #ifdef VIMAGE 6990 continue; 6991 #else 6992 return; 6993 #endif 6994 } 6995 SCTP_INP_INFO_RLOCK(); 6996 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6997 /* For each endpoint */ 6998 SCTP_INP_RLOCK(inp); 6999 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7000 /* For each association */ 7001 SCTP_TCB_LOCK(stcb); 7002 sctp_drain_mbufs(stcb); 7003 SCTP_TCB_UNLOCK(stcb); 7004 } 7005 SCTP_INP_RUNLOCK(inp); 7006 } 7007 SCTP_INP_INFO_RUNLOCK(); 7008 CURVNET_RESTORE(); 7009 } 7010 VNET_LIST_RUNLOCK_NOSLEEP(); 7011 } 7012 7013 /* 7014 * start a new iterator 7015 * iterates through all endpoints and associations based on the pcb_state 7016 * flags and asoc_state. "af" (mandatory) is executed for all matching 7017 * assocs and "ef" (optional) is executed when the iterator completes. 7018 * "inpf" (optional) is executed for each new endpoint as it is being 7019 * iterated through. inpe (optional) is called when the inp completes 7020 * its way through all the stcbs. 7021 */ 7022 int 7023 sctp_initiate_iterator(inp_func inpf, 7024 asoc_func af, 7025 inp_func inpe, 7026 uint32_t pcb_state, 7027 uint32_t pcb_features, 7028 uint32_t asoc_state, 7029 void *argp, 7030 uint32_t argi, 7031 end_func ef, 7032 struct sctp_inpcb *s_inp, 7033 uint8_t chunk_output_off) 7034 { 7035 struct sctp_iterator *it = NULL; 7036 7037 if (af == NULL) { 7038 return (-1); 7039 } 7040 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7041 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7042 SCTP_BASE_VAR(sctp_pcb_initialized)); 7043 return (-1); 7044 } 7045 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7046 SCTP_M_ITER); 7047 if (it == NULL) { 7048 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7049 return (-1); 7050 } 7051 memset(it, 0, sizeof(*it)); 7052 it->function_assoc = af; 7053 it->function_inp = inpf; 7054 if (inpf) 7055 it->done_current_ep = 0; 7056 else 7057 it->done_current_ep = 1; 7058 it->function_atend = ef; 7059 it->pointer = argp; 7060 it->val = argi; 7061 it->pcb_flags = pcb_state; 7062 it->pcb_features = pcb_features; 7063 it->asoc_state = asoc_state; 7064 it->function_inp_end = inpe; 7065 it->no_chunk_output = chunk_output_off; 7066 it->vn = curvnet; 7067 if (s_inp) { 7068 /* Assume lock is held here */ 7069 it->inp = s_inp; 7070 SCTP_INP_INCR_REF(it->inp); 7071 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7072 } else { 7073 SCTP_INP_INFO_RLOCK(); 7074 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7075 if (it->inp) { 7076 SCTP_INP_INCR_REF(it->inp); 7077 } 7078 SCTP_INP_INFO_RUNLOCK(); 7079 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7080 7081 } 7082 SCTP_IPI_ITERATOR_WQ_LOCK(); 7083 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7084 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7085 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7086 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7087 SCTP_FREE(it, SCTP_M_ITER); 7088 return (-1); 7089 } 7090 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7091 if (sctp_it_ctl.iterator_running == 0) { 7092 sctp_wakeup_iterator(); 7093 } 7094 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7095 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7096 return (0); 7097 } 7098