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 <netinet/sctp_os.h> 36 #include <sys/proc.h> 37 #include <netinet/sctp_var.h> 38 #include <netinet/sctp_sysctl.h> 39 #include <netinet/sctp_pcb.h> 40 #include <netinet/sctputil.h> 41 #include <netinet/sctp.h> 42 #include <netinet/sctp_header.h> 43 #include <netinet/sctp_asconf.h> 44 #include <netinet/sctp_output.h> 45 #include <netinet/sctp_timer.h> 46 #include <netinet/sctp_bsd_addr.h> 47 #if defined(INET) || defined(INET6) 48 #include <netinet/udp.h> 49 #endif 50 #ifdef INET6 51 #include <netinet6/ip6_var.h> 52 #endif 53 #include <sys/sched.h> 54 #include <sys/smp.h> 55 #include <sys/unistd.h> 56 57 /* FIX: we don't handle multiple link local scopes */ 58 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 59 #ifdef INET6 60 int 61 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 62 { 63 struct sockaddr_in6 tmp_a, tmp_b; 64 65 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 66 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 67 return (0); 68 } 69 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 70 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 71 return (0); 72 } 73 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 74 } 75 #endif 76 77 void 78 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 79 { 80 /* 81 * We really don't need to lock this, but I will just because it 82 * does not hurt. 83 */ 84 SCTP_INP_INFO_RLOCK(); 85 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 86 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 87 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 88 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 89 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 90 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 91 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 92 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 93 SCTP_INP_INFO_RUNLOCK(); 94 } 95 96 /*- 97 * Addresses are added to VRF's (Virtual Router's). For BSD we 98 * have only the default VRF 0. We maintain a hash list of 99 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 100 * these has a list of addresses. When we add a new address 101 * to a VRF we lookup the ifn/ifn_index, if the ifn does 102 * not exist we create it and add it to the list of IFN's 103 * within the VRF. Once we have the sctp_ifn, we add the 104 * address to the list. So we look something like: 105 * 106 * hash-vrf-table 107 * vrf-> ifn-> ifn -> ifn 108 * vrf | 109 * ... +--ifa-> ifa -> ifa 110 * vrf 111 * 112 * We keep these separate lists since the SCTP subsystem will 113 * point to these from its source address selection nets structure. 114 * When an address is deleted it does not happen right away on 115 * the SCTP side, it gets scheduled. What we do when a 116 * delete happens is immediately remove the address from 117 * the master list and decrement the refcount. As our 118 * addip iterator works through and frees the src address 119 * selection pointing to the sctp_ifa, eventually the refcount 120 * will reach 0 and we will delete it. Note that it is assumed 121 * that any locking on system level ifn/ifa is done at the 122 * caller of these functions and these routines will only 123 * lock the SCTP structures as they add or delete things. 124 * 125 * Other notes on VRF concepts. 126 * - An endpoint can be in multiple VRF's 127 * - An association lives within a VRF and only one VRF. 128 * - Any incoming packet we can deduce the VRF for by 129 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 130 * - Any downward send call or connect call must supply the 131 * VRF via ancillary data or via some sort of set default 132 * VRF socket option call (again for BSD no brainer since 133 * the VRF is always 0). 134 * - An endpoint may add multiple VRF's to it. 135 * - Listening sockets can accept associations in any 136 * of the VRF's they are in but the assoc will end up 137 * in only one VRF (gotten from the packet or connect/send). 138 * 139 */ 140 141 struct sctp_vrf * 142 sctp_allocate_vrf(int vrf_id) 143 { 144 struct sctp_vrf *vrf = NULL; 145 struct sctp_vrflist *bucket; 146 147 /* First allocate the VRF structure */ 148 vrf = sctp_find_vrf(vrf_id); 149 if (vrf) { 150 /* Already allocated */ 151 return (vrf); 152 } 153 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 154 SCTP_M_VRF); 155 if (vrf == NULL) { 156 /* No memory */ 157 #ifdef INVARIANTS 158 panic("No memory for VRF:%d", vrf_id); 159 #endif 160 return (NULL); 161 } 162 /* setup the VRF */ 163 memset(vrf, 0, sizeof(struct sctp_vrf)); 164 vrf->vrf_id = vrf_id; 165 LIST_INIT(&vrf->ifnlist); 166 vrf->total_ifa_count = 0; 167 vrf->refcount = 0; 168 /* now also setup table ids */ 169 SCTP_INIT_VRF_TABLEID(vrf); 170 /* Init the HASH of addresses */ 171 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 172 &vrf->vrf_addr_hashmark); 173 if (vrf->vrf_addr_hash == NULL) { 174 /* No memory */ 175 #ifdef INVARIANTS 176 panic("No memory for VRF:%d", vrf_id); 177 #endif 178 SCTP_FREE(vrf, SCTP_M_VRF); 179 return (NULL); 180 } 181 182 /* Add it to the hash table */ 183 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 184 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 185 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 186 return (vrf); 187 } 188 189 struct sctp_ifn * 190 sctp_find_ifn(void *ifn, uint32_t ifn_index) 191 { 192 struct sctp_ifn *sctp_ifnp; 193 struct sctp_ifnlist *hash_ifn_head; 194 195 SCTP_IPI_ADDR_LOCK_ASSERT(); 196 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 197 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 198 if (sctp_ifnp->ifn_index == ifn_index) { 199 break; 200 } 201 if (ifn != NULL && sctp_ifnp->ifn_p == ifn) { 202 break; 203 } 204 } 205 return (sctp_ifnp); 206 } 207 208 struct sctp_vrf * 209 sctp_find_vrf(uint32_t vrf_id) 210 { 211 struct sctp_vrflist *bucket; 212 struct sctp_vrf *liste; 213 214 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 215 LIST_FOREACH(liste, bucket, next_vrf) { 216 if (vrf_id == liste->vrf_id) { 217 return (liste); 218 } 219 } 220 return (NULL); 221 } 222 223 void 224 sctp_free_vrf(struct sctp_vrf *vrf) 225 { 226 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 227 if (vrf->vrf_addr_hash) { 228 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 229 vrf->vrf_addr_hash = NULL; 230 } 231 /* We zero'd the count */ 232 LIST_REMOVE(vrf, next_vrf); 233 SCTP_FREE(vrf, SCTP_M_VRF); 234 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 235 } 236 } 237 238 static void 239 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 240 { 241 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 242 /* We zero'd the count */ 243 if (sctp_ifnp->vrf) { 244 sctp_free_vrf(sctp_ifnp->vrf); 245 } 246 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 247 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 248 } 249 } 250 251 void 252 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 253 { 254 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 255 /* We zero'd the count */ 256 if (sctp_ifap->ifn_p) { 257 sctp_free_ifn(sctp_ifap->ifn_p); 258 } 259 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 260 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 261 } 262 } 263 264 static void 265 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp) 266 { 267 268 SCTP_IPI_ADDR_WLOCK_ASSERT(); 269 if (sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index) == NULL) { 270 /* Not in the list.. sorry */ 271 return; 272 } 273 LIST_REMOVE(sctp_ifnp, next_bucket); 274 LIST_REMOVE(sctp_ifnp, next_ifn); 275 /* Take away the reference, and possibly free it */ 276 sctp_free_ifn(sctp_ifnp); 277 } 278 279 void 280 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 281 const char *if_name, uint32_t ifn_index) 282 { 283 struct sctp_vrf *vrf; 284 struct sctp_ifa *sctp_ifap; 285 286 SCTP_IPI_ADDR_RLOCK(); 287 vrf = sctp_find_vrf(vrf_id); 288 if (vrf == NULL) { 289 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 290 goto out; 291 } 292 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 293 if (sctp_ifap == NULL) { 294 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 295 goto out; 296 } 297 if (sctp_ifap->ifn_p == NULL) { 298 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 299 goto out; 300 } 301 if (if_name) { 302 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 303 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 304 sctp_ifap->ifn_p->ifn_name, if_name); 305 goto out; 306 } 307 } else { 308 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 309 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 310 sctp_ifap->ifn_p->ifn_index, ifn_index); 311 goto out; 312 } 313 } 314 315 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 316 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 317 out: 318 SCTP_IPI_ADDR_RUNLOCK(); 319 } 320 321 void 322 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 323 const char *if_name, uint32_t ifn_index) 324 { 325 struct sctp_vrf *vrf; 326 struct sctp_ifa *sctp_ifap; 327 328 SCTP_IPI_ADDR_RLOCK(); 329 vrf = sctp_find_vrf(vrf_id); 330 if (vrf == NULL) { 331 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 332 goto out; 333 } 334 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 335 if (sctp_ifap == NULL) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 337 goto out; 338 } 339 if (sctp_ifap->ifn_p == NULL) { 340 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 341 goto out; 342 } 343 if (if_name) { 344 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 345 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 346 sctp_ifap->ifn_p->ifn_name, if_name); 347 goto out; 348 } 349 } else { 350 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 351 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 352 sctp_ifap->ifn_p->ifn_index, ifn_index); 353 goto out; 354 } 355 } 356 357 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 358 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 359 out: 360 SCTP_IPI_ADDR_RUNLOCK(); 361 } 362 363 /*- 364 * Add an ifa to an ifn. 365 * Register the interface as necessary. 366 */ 367 static void 368 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 369 { 370 int ifa_af; 371 372 SCTP_IPI_ADDR_WLOCK_ASSERT(); 373 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 374 sctp_ifap->ifn_p = sctp_ifnp; 375 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 376 /* update address counts */ 377 sctp_ifnp->ifa_count++; 378 ifa_af = sctp_ifap->address.sa.sa_family; 379 switch (ifa_af) { 380 #ifdef INET 381 case AF_INET: 382 sctp_ifnp->num_v4++; 383 break; 384 #endif 385 #ifdef INET6 386 case AF_INET6: 387 sctp_ifnp->num_v6++; 388 break; 389 #endif 390 default: 391 break; 392 } 393 if (sctp_ifnp->ifa_count == 1) { 394 /* register the new interface */ 395 sctp_ifnp->registered_af = ifa_af; 396 } 397 } 398 399 /*- 400 * Remove an ifa from its ifn. 401 * If no more addresses exist, remove the ifn too. Otherwise, re-register 402 * the interface based on the remaining address families left. 403 */ 404 static void 405 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 406 { 407 SCTP_IPI_ADDR_WLOCK_ASSERT(); 408 LIST_REMOVE(sctp_ifap, next_ifa); 409 if (sctp_ifap->ifn_p) { 410 /* update address counts */ 411 sctp_ifap->ifn_p->ifa_count--; 412 switch (sctp_ifap->address.sa.sa_family) { 413 #ifdef INET 414 case AF_INET: 415 sctp_ifap->ifn_p->num_v4--; 416 break; 417 #endif 418 #ifdef INET6 419 case AF_INET6: 420 sctp_ifap->ifn_p->num_v6--; 421 break; 422 #endif 423 default: 424 break; 425 } 426 427 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 428 /* remove the ifn, possibly freeing it */ 429 sctp_delete_ifn(sctp_ifap->ifn_p); 430 } else { 431 /* re-register address family type, if needed */ 432 if ((sctp_ifap->ifn_p->num_v6 == 0) && 433 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 434 sctp_ifap->ifn_p->registered_af = AF_INET; 435 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 436 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 437 sctp_ifap->ifn_p->registered_af = AF_INET6; 438 } 439 /* free the ifn refcount */ 440 sctp_free_ifn(sctp_ifap->ifn_p); 441 } 442 sctp_ifap->ifn_p = NULL; 443 } 444 } 445 446 struct sctp_ifa * 447 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 448 uint32_t ifn_type, const char *if_name, void *ifa, 449 struct sockaddr *addr, uint32_t ifa_flags, 450 int dynamic_add) 451 { 452 struct sctp_vrf *vrf; 453 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp; 454 struct sctp_ifa *sctp_ifap, *new_sctp_ifap; 455 struct sctp_ifalist *hash_addr_head; 456 struct sctp_ifnlist *hash_ifn_head; 457 uint32_t hash_of_addr; 458 459 #ifdef SCTP_DEBUG 460 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 461 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 462 #endif 463 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *, 464 sizeof(struct sctp_ifn), SCTP_M_IFN); 465 if (new_sctp_ifnp == NULL) { 466 #ifdef INVARIANTS 467 panic("No memory for IFN"); 468 #endif 469 return (NULL); 470 } 471 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 472 if (new_sctp_ifap == NULL) { 473 #ifdef INVARIANTS 474 panic("No memory for IFA"); 475 #endif 476 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 477 return (NULL); 478 } 479 480 SCTP_IPI_ADDR_WLOCK(); 481 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 482 if (sctp_ifnp) { 483 vrf = sctp_ifnp->vrf; 484 } else { 485 vrf = sctp_find_vrf(vrf_id); 486 if (vrf == NULL) { 487 vrf = sctp_allocate_vrf(vrf_id); 488 if (vrf == NULL) { 489 SCTP_IPI_ADDR_WUNLOCK(); 490 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 491 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 492 return (NULL); 493 } 494 } 495 } 496 if (sctp_ifnp == NULL) { 497 /* 498 * build one and add it, can't hold lock until after malloc 499 * done though. 500 */ 501 sctp_ifnp = new_sctp_ifnp; 502 new_sctp_ifnp = NULL; 503 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 504 sctp_ifnp->ifn_index = ifn_index; 505 sctp_ifnp->ifn_p = ifn; 506 sctp_ifnp->ifn_type = ifn_type; 507 sctp_ifnp->refcount = 0; 508 sctp_ifnp->vrf = vrf; 509 atomic_add_int(&vrf->refcount, 1); 510 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index); 511 if (if_name != NULL) { 512 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 513 } else { 514 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 515 } 516 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 517 LIST_INIT(&sctp_ifnp->ifalist); 518 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 519 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 520 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 521 } 522 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 523 if (sctp_ifap != NULL) { 524 /* The address being added is already or still known. */ 525 if (sctp_ifap->ifn_p != NULL) { 526 if (sctp_ifap->ifn_p->ifn_index == ifn_index) { 527 SCTPDBG(SCTP_DEBUG_PCB4, 528 "Using existing ifn %s (0x%x) for ifa %p\n", 529 sctp_ifap->ifn_p->ifn_name, ifn_index, 530 (void *)sctp_ifap); 531 if (new_sctp_ifnp == NULL) { 532 /* Remove the created one not used. */ 533 sctp_delete_ifn(sctp_ifnp); 534 } 535 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 536 /* Switch back to active. */ 537 SCTPDBG(SCTP_DEBUG_PCB4, 538 "Clearing deleted ifa flag\n"); 539 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 540 sctp_ifap->ifn_p = sctp_ifnp; 541 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 542 } 543 } else { 544 /* 545 * The last IFN gets the address, remove the 546 * old one. 547 */ 548 SCTPDBG(SCTP_DEBUG_PCB4, 549 "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 550 (void *)sctp_ifap, 551 sctp_ifap->ifn_p->ifn_name, 552 sctp_ifap->ifn_p->ifn_index, if_name, 553 ifn_index); 554 /* remove the address from the old ifn */ 555 sctp_remove_ifa_from_ifn(sctp_ifap); 556 /* move the address over to the new ifn */ 557 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 558 } 559 } else { 560 /* Repair ifn_p, which was NULL... */ 561 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 562 SCTPDBG(SCTP_DEBUG_PCB4, 563 "Repairing ifn %p for ifa %p\n", 564 (void *)sctp_ifnp, (void *)sctp_ifap); 565 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 566 } 567 SCTP_IPI_ADDR_WUNLOCK(); 568 if (new_sctp_ifnp != NULL) { 569 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 570 } 571 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 572 return (sctp_ifap); 573 } 574 KASSERT(sctp_ifnp != NULL, 575 ("sctp_add_addr_to_vrf: sctp_ifnp == NULL")); 576 KASSERT(sctp_ifap == NULL, 577 ("sctp_add_addr_to_vrf: sctp_ifap (%p) != NULL", sctp_ifap)); 578 sctp_ifap = new_sctp_ifap; 579 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 580 sctp_ifap->ifn_p = sctp_ifnp; 581 atomic_add_int(&sctp_ifnp->refcount, 1); 582 sctp_ifap->vrf_id = vrf_id; 583 sctp_ifap->ifa = ifa; 584 memcpy(&sctp_ifap->address, addr, addr->sa_len); 585 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 586 sctp_ifap->flags = ifa_flags; 587 /* Set scope */ 588 switch (sctp_ifap->address.sa.sa_family) { 589 #ifdef INET 590 case AF_INET: 591 { 592 struct sockaddr_in *sin; 593 594 sin = &sctp_ifap->address.sin; 595 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 596 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 597 sctp_ifap->src_is_loop = 1; 598 } 599 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 600 sctp_ifap->src_is_priv = 1; 601 } 602 sctp_ifnp->num_v4++; 603 if (new_sctp_ifnp == NULL) 604 sctp_ifnp->registered_af = AF_INET; 605 break; 606 } 607 #endif 608 #ifdef INET6 609 case AF_INET6: 610 { 611 /* ok to use deprecated addresses? */ 612 struct sockaddr_in6 *sin6; 613 614 sin6 = &sctp_ifap->address.sin6; 615 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 616 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 617 sctp_ifap->src_is_loop = 1; 618 } 619 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 620 sctp_ifap->src_is_priv = 1; 621 } 622 sctp_ifnp->num_v6++; 623 if (new_sctp_ifnp == NULL) 624 sctp_ifnp->registered_af = AF_INET6; 625 break; 626 } 627 #endif 628 default: 629 break; 630 } 631 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 632 633 if ((sctp_ifap->src_is_priv == 0) && 634 (sctp_ifap->src_is_loop == 0)) { 635 sctp_ifap->src_is_glob = 1; 636 } 637 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 638 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 639 sctp_ifap->refcount = 1; 640 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 641 sctp_ifnp->ifa_count++; 642 vrf->total_ifa_count++; 643 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 644 SCTP_IPI_ADDR_WUNLOCK(); 645 if (new_sctp_ifnp != NULL) { 646 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 647 } 648 649 if (dynamic_add) { 650 /* 651 * Bump up the refcount so that when the timer completes it 652 * will drop back down. 653 */ 654 struct sctp_laddr *wi; 655 656 atomic_add_int(&sctp_ifap->refcount, 1); 657 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 658 if (wi == NULL) { 659 /* 660 * Gak, what can we do? We have lost an address 661 * change can you say HOSED? 662 */ 663 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 664 /* Opps, must decrement the count */ 665 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 666 if_name); 667 return (NULL); 668 } 669 SCTP_INCR_LADDR_COUNT(); 670 memset(wi, 0, sizeof(*wi)); 671 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 672 wi->ifa = sctp_ifap; 673 wi->action = SCTP_ADD_IP_ADDRESS; 674 675 SCTP_WQ_ADDR_LOCK(); 676 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 677 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 678 (struct sctp_inpcb *)NULL, 679 (struct sctp_tcb *)NULL, 680 (struct sctp_nets *)NULL); 681 SCTP_WQ_ADDR_UNLOCK(); 682 } else { 683 /* it's ready for use */ 684 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 685 } 686 return (sctp_ifap); 687 } 688 689 void 690 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 691 uint32_t ifn_index, const char *if_name) 692 { 693 struct sctp_vrf *vrf; 694 struct sctp_ifa *sctp_ifap; 695 696 SCTP_IPI_ADDR_WLOCK(); 697 vrf = sctp_find_vrf(vrf_id); 698 if (vrf == NULL) { 699 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 700 SCTP_IPI_ADDR_WUNLOCK(); 701 return; 702 } 703 704 #ifdef SCTP_DEBUG 705 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 706 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 707 #endif 708 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 709 if (sctp_ifap != NULL) { 710 /* Validate the delete */ 711 if (sctp_ifap->ifn_p) { 712 bool valid = false; 713 714 /*- 715 * The name has priority over the ifn_index 716 * if its given. 717 */ 718 if (if_name) { 719 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 720 /* They match its a correct delete */ 721 valid = true; 722 } 723 } 724 if (!valid) { 725 /* last ditch check ifn_index */ 726 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 727 valid = true; 728 } 729 } 730 if (!valid) { 731 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 732 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 733 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 734 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 735 SCTP_IPI_ADDR_WUNLOCK(); 736 return; 737 } 738 } 739 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 740 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 741 /* 742 * We don't set the flag. This means that the structure will 743 * hang around in EP's that have bound specific to it until 744 * they close. This gives us TCP like behavior if someone 745 * removes an address (or for that matter adds it right 746 * back). 747 */ 748 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 749 vrf->total_ifa_count--; 750 LIST_REMOVE(sctp_ifap, next_bucket); 751 sctp_remove_ifa_from_ifn(sctp_ifap); 752 } 753 #ifdef SCTP_DEBUG 754 else { 755 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 756 ifn_index); 757 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 758 } 759 #endif 760 761 SCTP_IPI_ADDR_WUNLOCK(); 762 if (sctp_ifap != NULL) { 763 struct sctp_laddr *wi; 764 765 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 766 if (wi == NULL) { 767 /* 768 * Gak, what can we do? We have lost an address 769 * change can you say HOSED? 770 */ 771 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 772 773 /* Oops, must decrement the count */ 774 sctp_free_ifa(sctp_ifap); 775 return; 776 } 777 SCTP_INCR_LADDR_COUNT(); 778 memset(wi, 0, sizeof(*wi)); 779 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 780 wi->ifa = sctp_ifap; 781 wi->action = SCTP_DEL_IP_ADDRESS; 782 SCTP_WQ_ADDR_LOCK(); 783 /* 784 * Should this really be a tailq? As it is we will process 785 * the newest first :-0 786 */ 787 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 788 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 789 (struct sctp_inpcb *)NULL, 790 (struct sctp_tcb *)NULL, 791 (struct sctp_nets *)NULL); 792 SCTP_WQ_ADDR_UNLOCK(); 793 } 794 return; 795 } 796 797 static int 798 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 799 { 800 int loopback_scope; 801 #if defined(INET) 802 int ipv4_local_scope, ipv4_addr_legal; 803 #endif 804 #if defined(INET6) 805 int local_scope, site_scope, ipv6_addr_legal; 806 #endif 807 struct sctp_vrf *vrf; 808 struct sctp_ifn *sctp_ifn; 809 struct sctp_ifa *sctp_ifa; 810 811 loopback_scope = stcb->asoc.scope.loopback_scope; 812 #if defined(INET) 813 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 814 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 815 #endif 816 #if defined(INET6) 817 local_scope = stcb->asoc.scope.local_scope; 818 site_scope = stcb->asoc.scope.site_scope; 819 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 820 #endif 821 822 SCTP_IPI_ADDR_RLOCK(); 823 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 824 if (vrf == NULL) { 825 /* no vrf, no addresses */ 826 SCTP_IPI_ADDR_RUNLOCK(); 827 return (0); 828 } 829 830 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 831 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 832 if ((loopback_scope == 0) && 833 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 834 continue; 835 } 836 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 837 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 838 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 839 /* 840 * We allow pending addresses, where 841 * we have sent an asconf-add to be 842 * considered valid. 843 */ 844 continue; 845 } 846 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 847 continue; 848 } 849 switch (sctp_ifa->address.sa.sa_family) { 850 #ifdef INET 851 case AF_INET: 852 if (ipv4_addr_legal) { 853 struct sockaddr_in *sin, 854 *rsin; 855 856 sin = &sctp_ifa->address.sin; 857 rsin = (struct sockaddr_in *)to; 858 if ((ipv4_local_scope == 0) && 859 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 860 continue; 861 } 862 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 863 &sin->sin_addr) != 0) { 864 continue; 865 } 866 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 867 SCTP_IPI_ADDR_RUNLOCK(); 868 return (1); 869 } 870 } 871 break; 872 #endif 873 #ifdef INET6 874 case AF_INET6: 875 if (ipv6_addr_legal) { 876 struct sockaddr_in6 *sin6, 877 *rsin6; 878 879 sin6 = &sctp_ifa->address.sin6; 880 rsin6 = (struct sockaddr_in6 *)to; 881 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 882 &sin6->sin6_addr) != 0) { 883 continue; 884 } 885 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 886 if (local_scope == 0) 887 continue; 888 if (sin6->sin6_scope_id == 0) { 889 if (sa6_recoverscope(sin6) != 0) 890 continue; 891 } 892 } 893 if ((site_scope == 0) && 894 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 895 continue; 896 } 897 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 898 SCTP_IPI_ADDR_RUNLOCK(); 899 return (1); 900 } 901 } 902 break; 903 #endif 904 default: 905 /* TSNH */ 906 break; 907 } 908 } 909 } 910 } else { 911 struct sctp_laddr *laddr; 912 913 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 914 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 915 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 916 continue; 917 } 918 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 919 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 920 /* 921 * We allow pending addresses, where we have 922 * sent an asconf-add to be considered 923 * valid. 924 */ 925 continue; 926 } 927 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 928 continue; 929 } 930 switch (to->sa_family) { 931 #ifdef INET 932 case AF_INET: 933 { 934 struct sockaddr_in *sin, *rsin; 935 936 sin = &laddr->ifa->address.sin; 937 rsin = (struct sockaddr_in *)to; 938 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 939 SCTP_IPI_ADDR_RUNLOCK(); 940 return (1); 941 } 942 break; 943 } 944 #endif 945 #ifdef INET6 946 case AF_INET6: 947 { 948 struct sockaddr_in6 *sin6, *rsin6; 949 950 sin6 = &laddr->ifa->address.sin6; 951 rsin6 = (struct sockaddr_in6 *)to; 952 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 953 SCTP_IPI_ADDR_RUNLOCK(); 954 return (1); 955 } 956 break; 957 } 958 959 #endif 960 default: 961 /* TSNH */ 962 break; 963 } 964 } 965 } 966 SCTP_IPI_ADDR_RUNLOCK(); 967 return (0); 968 } 969 970 static struct sctp_tcb * 971 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 972 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 973 { 974 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 975 /* 976 * If we support the TCP model, then we must now dig through to see 977 * if we can find our endpoint in the list of tcp ep's. 978 */ 979 uint16_t lport, rport; 980 struct sctppcbhead *ephead; 981 struct sctp_inpcb *inp; 982 struct sctp_laddr *laddr; 983 struct sctp_tcb *stcb; 984 struct sctp_nets *net; 985 986 if ((to == NULL) || (from == NULL)) { 987 return (NULL); 988 } 989 990 switch (to->sa_family) { 991 #ifdef INET 992 case AF_INET: 993 if (from->sa_family == AF_INET) { 994 lport = ((struct sockaddr_in *)to)->sin_port; 995 rport = ((struct sockaddr_in *)from)->sin_port; 996 } else { 997 return (NULL); 998 } 999 break; 1000 #endif 1001 #ifdef INET6 1002 case AF_INET6: 1003 if (from->sa_family == AF_INET6) { 1004 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1005 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1006 } else { 1007 return (NULL); 1008 } 1009 break; 1010 #endif 1011 default: 1012 return (NULL); 1013 } 1014 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1015 /* 1016 * Ok now for each of the guys in this bucket we must look and see: 1017 * - Does the remote port match. - Does there single association's 1018 * addresses match this address (to). If so we update p_ep to point 1019 * to this ep and return the tcb from it. 1020 */ 1021 LIST_FOREACH(inp, ephead, sctp_hash) { 1022 SCTP_INP_RLOCK(inp); 1023 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1024 SCTP_INP_RUNLOCK(inp); 1025 continue; 1026 } 1027 if (lport != inp->sctp_lport) { 1028 SCTP_INP_RUNLOCK(inp); 1029 continue; 1030 } 1031 switch (to->sa_family) { 1032 #ifdef INET 1033 case AF_INET: 1034 { 1035 struct sockaddr_in *sin; 1036 1037 sin = (struct sockaddr_in *)to; 1038 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1039 &sin->sin_addr) != 0) { 1040 SCTP_INP_RUNLOCK(inp); 1041 continue; 1042 } 1043 break; 1044 } 1045 #endif 1046 #ifdef INET6 1047 case AF_INET6: 1048 { 1049 struct sockaddr_in6 *sin6; 1050 1051 sin6 = (struct sockaddr_in6 *)to; 1052 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1053 &sin6->sin6_addr) != 0) { 1054 SCTP_INP_RUNLOCK(inp); 1055 continue; 1056 } 1057 break; 1058 } 1059 #endif 1060 default: 1061 SCTP_INP_RUNLOCK(inp); 1062 continue; 1063 } 1064 if (inp->def_vrf_id != vrf_id) { 1065 SCTP_INP_RUNLOCK(inp); 1066 continue; 1067 } 1068 /* check to see if the ep has one of the addresses */ 1069 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1070 /* We are NOT bound all, so look further */ 1071 int match = 0; 1072 1073 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1074 if (laddr->ifa == NULL) { 1075 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1076 continue; 1077 } 1078 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1079 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1080 continue; 1081 } 1082 if (laddr->ifa->address.sa.sa_family == 1083 to->sa_family) { 1084 /* see if it matches */ 1085 #ifdef INET 1086 if (from->sa_family == AF_INET) { 1087 struct sockaddr_in *intf_addr, 1088 *sin; 1089 1090 intf_addr = &laddr->ifa->address.sin; 1091 sin = (struct sockaddr_in *)to; 1092 if (sin->sin_addr.s_addr == 1093 intf_addr->sin_addr.s_addr) { 1094 match = 1; 1095 break; 1096 } 1097 } 1098 #endif 1099 #ifdef INET6 1100 if (from->sa_family == AF_INET6) { 1101 struct sockaddr_in6 *intf_addr6; 1102 struct sockaddr_in6 *sin6; 1103 1104 sin6 = (struct sockaddr_in6 *) 1105 to; 1106 intf_addr6 = &laddr->ifa->address.sin6; 1107 1108 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1109 intf_addr6)) { 1110 match = 1; 1111 break; 1112 } 1113 } 1114 #endif 1115 } 1116 } 1117 if (match == 0) { 1118 /* This endpoint does not have this address */ 1119 SCTP_INP_RUNLOCK(inp); 1120 continue; 1121 } 1122 } 1123 /* 1124 * Ok if we hit here the ep has the address, does it hold 1125 * the tcb? 1126 */ 1127 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1128 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1129 if (stcb == NULL) { 1130 SCTP_INP_RUNLOCK(inp); 1131 continue; 1132 } 1133 SCTP_TCB_LOCK(stcb); 1134 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1135 SCTP_TCB_UNLOCK(stcb); 1136 SCTP_INP_RUNLOCK(inp); 1137 continue; 1138 } 1139 if (stcb->rport != rport) { 1140 /* remote port does not match. */ 1141 SCTP_TCB_UNLOCK(stcb); 1142 SCTP_INP_RUNLOCK(inp); 1143 continue; 1144 } 1145 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1146 SCTP_TCB_UNLOCK(stcb); 1147 SCTP_INP_RUNLOCK(inp); 1148 continue; 1149 } 1150 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1151 SCTP_TCB_UNLOCK(stcb); 1152 SCTP_INP_RUNLOCK(inp); 1153 continue; 1154 } 1155 /* Does this TCB have a matching address? */ 1156 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1157 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1158 /* not the same family, can't be a match */ 1159 continue; 1160 } 1161 switch (from->sa_family) { 1162 #ifdef INET 1163 case AF_INET: 1164 { 1165 struct sockaddr_in *sin, *rsin; 1166 1167 sin = (struct sockaddr_in *)&net->ro._l_addr; 1168 rsin = (struct sockaddr_in *)from; 1169 if (sin->sin_addr.s_addr == 1170 rsin->sin_addr.s_addr) { 1171 /* found it */ 1172 if (netp != NULL) { 1173 *netp = net; 1174 } 1175 /* 1176 * Update the endpoint 1177 * pointer 1178 */ 1179 *inp_p = inp; 1180 SCTP_INP_RUNLOCK(inp); 1181 return (stcb); 1182 } 1183 break; 1184 } 1185 #endif 1186 #ifdef INET6 1187 case AF_INET6: 1188 { 1189 struct sockaddr_in6 *sin6, *rsin6; 1190 1191 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1192 rsin6 = (struct sockaddr_in6 *)from; 1193 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1194 rsin6)) { 1195 /* found it */ 1196 if (netp != NULL) { 1197 *netp = net; 1198 } 1199 /* 1200 * Update the endpoint 1201 * pointer 1202 */ 1203 *inp_p = inp; 1204 SCTP_INP_RUNLOCK(inp); 1205 return (stcb); 1206 } 1207 break; 1208 } 1209 #endif 1210 default: 1211 /* TSNH */ 1212 break; 1213 } 1214 } 1215 SCTP_TCB_UNLOCK(stcb); 1216 SCTP_INP_RUNLOCK(inp); 1217 } 1218 return (NULL); 1219 } 1220 1221 /* 1222 * rules for use 1223 * 1224 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1225 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1226 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1227 * NULL. 1228 */ 1229 1230 struct sctp_tcb * 1231 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1232 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1233 { 1234 struct sctpasochead *head; 1235 struct sctp_inpcb *inp; 1236 struct sctp_tcb *stcb = NULL; 1237 struct sctp_nets *net; 1238 uint16_t rport; 1239 1240 inp = *inp_p; 1241 switch (remote->sa_family) { 1242 #ifdef INET 1243 case AF_INET: 1244 rport = (((struct sockaddr_in *)remote)->sin_port); 1245 break; 1246 #endif 1247 #ifdef INET6 1248 case AF_INET6: 1249 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1250 break; 1251 #endif 1252 default: 1253 return (NULL); 1254 } 1255 if (locked_tcb) { 1256 /* 1257 * UN-lock so we can do proper locking here this occurs when 1258 * called from load_addresses_from_init. 1259 */ 1260 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1261 SCTP_TCB_UNLOCK(locked_tcb); 1262 } 1263 SCTP_INP_INFO_RLOCK(); 1264 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1265 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1266 /*- 1267 * Now either this guy is our listener or it's the 1268 * connector. If it is the one that issued the connect, then 1269 * it's only chance is to be the first TCB in the list. If 1270 * it is the acceptor, then do the special_lookup to hash 1271 * and find the real inp. 1272 */ 1273 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1274 /* to is peer addr, from is my addr */ 1275 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1276 netp, inp->def_vrf_id); 1277 if ((stcb != NULL) && (locked_tcb == NULL)) { 1278 /* we have a locked tcb, lower refcount */ 1279 SCTP_INP_DECR_REF(inp); 1280 } 1281 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1282 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1283 SCTP_TCB_LOCK(locked_tcb); 1284 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1285 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1286 } 1287 SCTP_INP_INFO_RUNLOCK(); 1288 return (stcb); 1289 } else { 1290 SCTP_INP_WLOCK(inp); 1291 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1292 goto null_return; 1293 } 1294 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1295 if (stcb == NULL) { 1296 goto null_return; 1297 } 1298 SCTP_TCB_LOCK(stcb); 1299 1300 if (stcb->rport != rport) { 1301 /* remote port does not match. */ 1302 SCTP_TCB_UNLOCK(stcb); 1303 goto null_return; 1304 } 1305 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1306 SCTP_TCB_UNLOCK(stcb); 1307 goto null_return; 1308 } 1309 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1310 SCTP_TCB_UNLOCK(stcb); 1311 goto null_return; 1312 } 1313 /* now look at the list of remote addresses */ 1314 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1315 #ifdef INVARIANTS 1316 if (net == (TAILQ_NEXT(net, sctp_next))) { 1317 panic("Corrupt net list"); 1318 } 1319 #endif 1320 if (net->ro._l_addr.sa.sa_family != 1321 remote->sa_family) { 1322 /* not the same family */ 1323 continue; 1324 } 1325 switch (remote->sa_family) { 1326 #ifdef INET 1327 case AF_INET: 1328 { 1329 struct sockaddr_in *sin, 1330 *rsin; 1331 1332 sin = (struct sockaddr_in *) 1333 &net->ro._l_addr; 1334 rsin = (struct sockaddr_in *)remote; 1335 if (sin->sin_addr.s_addr == 1336 rsin->sin_addr.s_addr) { 1337 /* found it */ 1338 if (netp != NULL) { 1339 *netp = net; 1340 } 1341 if (locked_tcb == NULL) { 1342 SCTP_INP_DECR_REF(inp); 1343 } else if (locked_tcb != stcb) { 1344 SCTP_TCB_LOCK(locked_tcb); 1345 } 1346 if (locked_tcb) { 1347 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1348 } 1349 1350 SCTP_INP_WUNLOCK(inp); 1351 SCTP_INP_INFO_RUNLOCK(); 1352 return (stcb); 1353 } 1354 break; 1355 } 1356 #endif 1357 #ifdef INET6 1358 case AF_INET6: 1359 { 1360 struct sockaddr_in6 *sin6, 1361 *rsin6; 1362 1363 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1364 rsin6 = (struct sockaddr_in6 *)remote; 1365 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1366 rsin6)) { 1367 /* found it */ 1368 if (netp != NULL) { 1369 *netp = net; 1370 } 1371 if (locked_tcb == NULL) { 1372 SCTP_INP_DECR_REF(inp); 1373 } else if (locked_tcb != stcb) { 1374 SCTP_TCB_LOCK(locked_tcb); 1375 } 1376 if (locked_tcb) { 1377 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1378 } 1379 SCTP_INP_WUNLOCK(inp); 1380 SCTP_INP_INFO_RUNLOCK(); 1381 return (stcb); 1382 } 1383 break; 1384 } 1385 #endif 1386 default: 1387 /* TSNH */ 1388 break; 1389 } 1390 } 1391 SCTP_TCB_UNLOCK(stcb); 1392 } 1393 } else { 1394 SCTP_INP_WLOCK(inp); 1395 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1396 goto null_return; 1397 } 1398 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1399 inp->sctp_hashmark)]; 1400 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1401 if (stcb->rport != rport) { 1402 /* remote port does not match */ 1403 continue; 1404 } 1405 SCTP_TCB_LOCK(stcb); 1406 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1407 SCTP_TCB_UNLOCK(stcb); 1408 continue; 1409 } 1410 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1411 SCTP_TCB_UNLOCK(stcb); 1412 continue; 1413 } 1414 /* now look at the list of remote addresses */ 1415 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1416 #ifdef INVARIANTS 1417 if (net == (TAILQ_NEXT(net, sctp_next))) { 1418 panic("Corrupt net list"); 1419 } 1420 #endif 1421 if (net->ro._l_addr.sa.sa_family != 1422 remote->sa_family) { 1423 /* not the same family */ 1424 continue; 1425 } 1426 switch (remote->sa_family) { 1427 #ifdef INET 1428 case AF_INET: 1429 { 1430 struct sockaddr_in *sin, 1431 *rsin; 1432 1433 sin = (struct sockaddr_in *) 1434 &net->ro._l_addr; 1435 rsin = (struct sockaddr_in *)remote; 1436 if (sin->sin_addr.s_addr == 1437 rsin->sin_addr.s_addr) { 1438 /* found it */ 1439 if (netp != NULL) { 1440 *netp = net; 1441 } 1442 if (locked_tcb == NULL) { 1443 SCTP_INP_DECR_REF(inp); 1444 } else if (locked_tcb != stcb) { 1445 SCTP_TCB_LOCK(locked_tcb); 1446 } 1447 if (locked_tcb) { 1448 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1449 } 1450 SCTP_INP_WUNLOCK(inp); 1451 SCTP_INP_INFO_RUNLOCK(); 1452 return (stcb); 1453 } 1454 break; 1455 } 1456 #endif 1457 #ifdef INET6 1458 case AF_INET6: 1459 { 1460 struct sockaddr_in6 *sin6, 1461 *rsin6; 1462 1463 sin6 = (struct sockaddr_in6 *) 1464 &net->ro._l_addr; 1465 rsin6 = (struct sockaddr_in6 *)remote; 1466 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1467 rsin6)) { 1468 /* found it */ 1469 if (netp != NULL) { 1470 *netp = net; 1471 } 1472 if (locked_tcb == NULL) { 1473 SCTP_INP_DECR_REF(inp); 1474 } else if (locked_tcb != stcb) { 1475 SCTP_TCB_LOCK(locked_tcb); 1476 } 1477 if (locked_tcb) { 1478 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1479 } 1480 SCTP_INP_WUNLOCK(inp); 1481 SCTP_INP_INFO_RUNLOCK(); 1482 return (stcb); 1483 } 1484 break; 1485 } 1486 #endif 1487 default: 1488 /* TSNH */ 1489 break; 1490 } 1491 } 1492 SCTP_TCB_UNLOCK(stcb); 1493 } 1494 } 1495 null_return: 1496 /* clean up for returning null */ 1497 if (locked_tcb) { 1498 SCTP_TCB_LOCK(locked_tcb); 1499 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1500 } 1501 SCTP_INP_WUNLOCK(inp); 1502 SCTP_INP_INFO_RUNLOCK(); 1503 /* not found */ 1504 return (NULL); 1505 } 1506 1507 /* 1508 * Find an association for a specific endpoint using the association id given 1509 * out in the COMM_UP notification 1510 */ 1511 struct sctp_tcb * 1512 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1513 { 1514 /* 1515 * Use my the assoc_id to find a endpoint 1516 */ 1517 struct sctpasochead *head; 1518 struct sctp_tcb *stcb; 1519 uint32_t id; 1520 1521 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1522 SCTP_PRINTF("TSNH ep_associd0\n"); 1523 return (NULL); 1524 } 1525 id = (uint32_t)asoc_id; 1526 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1527 if (head == NULL) { 1528 /* invalid id TSNH */ 1529 SCTP_PRINTF("TSNH ep_associd1\n"); 1530 return (NULL); 1531 } 1532 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1533 if (stcb->asoc.assoc_id == id) { 1534 if (inp != stcb->sctp_ep) { 1535 /* 1536 * some other guy has the same id active (id 1537 * collision ??). 1538 */ 1539 SCTP_PRINTF("TSNH ep_associd2\n"); 1540 continue; 1541 } 1542 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1543 continue; 1544 } 1545 if (want_lock) { 1546 SCTP_TCB_LOCK(stcb); 1547 } 1548 return (stcb); 1549 } 1550 } 1551 return (NULL); 1552 } 1553 1554 struct sctp_tcb * 1555 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1556 { 1557 struct sctp_tcb *stcb; 1558 1559 SCTP_INP_RLOCK(inp); 1560 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1561 SCTP_INP_RUNLOCK(inp); 1562 return (stcb); 1563 } 1564 1565 /* 1566 * Endpoint probe expects that the INP_INFO is locked. 1567 */ 1568 static struct sctp_inpcb * 1569 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1570 uint16_t lport, uint32_t vrf_id) 1571 { 1572 struct sctp_inpcb *inp; 1573 struct sctp_laddr *laddr; 1574 #ifdef INET 1575 struct sockaddr_in *sin; 1576 #endif 1577 #ifdef INET6 1578 struct sockaddr_in6 *sin6; 1579 struct sockaddr_in6 *intf_addr6; 1580 #endif 1581 int fnd; 1582 1583 #ifdef INET 1584 sin = NULL; 1585 #endif 1586 #ifdef INET6 1587 sin6 = NULL; 1588 #endif 1589 switch (nam->sa_family) { 1590 #ifdef INET 1591 case AF_INET: 1592 sin = (struct sockaddr_in *)nam; 1593 break; 1594 #endif 1595 #ifdef INET6 1596 case AF_INET6: 1597 sin6 = (struct sockaddr_in6 *)nam; 1598 break; 1599 #endif 1600 default: 1601 /* unsupported family */ 1602 return (NULL); 1603 } 1604 1605 if (head == NULL) 1606 return (NULL); 1607 1608 LIST_FOREACH(inp, head, sctp_hash) { 1609 SCTP_INP_RLOCK(inp); 1610 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1611 SCTP_INP_RUNLOCK(inp); 1612 continue; 1613 } 1614 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1615 (inp->sctp_lport == lport)) { 1616 /* got it */ 1617 switch (nam->sa_family) { 1618 #ifdef INET 1619 case AF_INET: 1620 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1621 SCTP_IPV6_V6ONLY(inp)) { 1622 /* 1623 * IPv4 on a IPv6 socket with ONLY 1624 * IPv6 set 1625 */ 1626 SCTP_INP_RUNLOCK(inp); 1627 continue; 1628 } 1629 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1630 &sin->sin_addr) != 0) { 1631 SCTP_INP_RUNLOCK(inp); 1632 continue; 1633 } 1634 break; 1635 #endif 1636 #ifdef INET6 1637 case AF_INET6: 1638 /* 1639 * A V6 address and the endpoint is NOT 1640 * bound V6 1641 */ 1642 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1643 SCTP_INP_RUNLOCK(inp); 1644 continue; 1645 } 1646 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1647 &sin6->sin6_addr) != 0) { 1648 SCTP_INP_RUNLOCK(inp); 1649 continue; 1650 } 1651 break; 1652 #endif 1653 default: 1654 break; 1655 } 1656 /* does a VRF id match? */ 1657 fnd = 0; 1658 if (inp->def_vrf_id == vrf_id) 1659 fnd = 1; 1660 1661 SCTP_INP_RUNLOCK(inp); 1662 if (!fnd) 1663 continue; 1664 return (inp); 1665 } 1666 SCTP_INP_RUNLOCK(inp); 1667 } 1668 switch (nam->sa_family) { 1669 #ifdef INET 1670 case AF_INET: 1671 if (sin->sin_addr.s_addr == INADDR_ANY) { 1672 /* Can't hunt for one that has no address specified */ 1673 return (NULL); 1674 } 1675 break; 1676 #endif 1677 #ifdef INET6 1678 case AF_INET6: 1679 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1680 /* Can't hunt for one that has no address specified */ 1681 return (NULL); 1682 } 1683 break; 1684 #endif 1685 default: 1686 break; 1687 } 1688 /* 1689 * ok, not bound to all so see if we can find a EP bound to this 1690 * address. 1691 */ 1692 LIST_FOREACH(inp, head, sctp_hash) { 1693 SCTP_INP_RLOCK(inp); 1694 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1695 SCTP_INP_RUNLOCK(inp); 1696 continue; 1697 } 1698 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1699 SCTP_INP_RUNLOCK(inp); 1700 continue; 1701 } 1702 /* 1703 * Ok this could be a likely candidate, look at all of its 1704 * addresses 1705 */ 1706 if (inp->sctp_lport != lport) { 1707 SCTP_INP_RUNLOCK(inp); 1708 continue; 1709 } 1710 /* does a VRF id match? */ 1711 fnd = 0; 1712 if (inp->def_vrf_id == vrf_id) 1713 fnd = 1; 1714 1715 if (!fnd) { 1716 SCTP_INP_RUNLOCK(inp); 1717 continue; 1718 } 1719 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1720 if (laddr->ifa == NULL) { 1721 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1722 __func__); 1723 continue; 1724 } 1725 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1726 (void *)laddr->ifa); 1727 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1728 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1729 continue; 1730 } 1731 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1732 /* possible, see if it matches */ 1733 switch (nam->sa_family) { 1734 #ifdef INET 1735 case AF_INET: 1736 if (sin->sin_addr.s_addr == 1737 laddr->ifa->address.sin.sin_addr.s_addr) { 1738 SCTP_INP_RUNLOCK(inp); 1739 return (inp); 1740 } 1741 break; 1742 #endif 1743 #ifdef INET6 1744 case AF_INET6: 1745 intf_addr6 = &laddr->ifa->address.sin6; 1746 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1747 intf_addr6)) { 1748 SCTP_INP_RUNLOCK(inp); 1749 return (inp); 1750 } 1751 break; 1752 #endif 1753 } 1754 } 1755 } 1756 SCTP_INP_RUNLOCK(inp); 1757 } 1758 return (NULL); 1759 } 1760 1761 static struct sctp_inpcb * 1762 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1763 { 1764 struct sctppcbhead *head; 1765 struct sctp_inpcb *t_inp; 1766 int fnd; 1767 1768 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1769 SCTP_BASE_INFO(hashmark))]; 1770 LIST_FOREACH(t_inp, head, sctp_hash) { 1771 if (t_inp->sctp_lport != lport) { 1772 continue; 1773 } 1774 /* is it in the VRF in question */ 1775 fnd = 0; 1776 if (t_inp->def_vrf_id == vrf_id) 1777 fnd = 1; 1778 if (!fnd) 1779 continue; 1780 1781 /* This one is in use. */ 1782 /* check the v6/v4 binding issue */ 1783 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1784 SCTP_IPV6_V6ONLY(t_inp)) { 1785 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1786 /* collision in V6 space */ 1787 return (t_inp); 1788 } else { 1789 /* inp is BOUND_V4 no conflict */ 1790 continue; 1791 } 1792 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1793 /* t_inp is bound v4 and v6, conflict always */ 1794 return (t_inp); 1795 } else { 1796 /* t_inp is bound only V4 */ 1797 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1798 SCTP_IPV6_V6ONLY(inp)) { 1799 /* no conflict */ 1800 continue; 1801 } 1802 /* else fall through to conflict */ 1803 } 1804 return (t_inp); 1805 } 1806 return (NULL); 1807 } 1808 1809 int 1810 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1811 { 1812 /* For 1-2-1 with port reuse */ 1813 struct sctppcbhead *head; 1814 struct sctp_inpcb *tinp, *ninp; 1815 1816 SCTP_INP_INFO_WLOCK_ASSERT(); 1817 SCTP_INP_WLOCK_ASSERT(inp); 1818 1819 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1820 /* only works with port reuse on */ 1821 return (-1); 1822 } 1823 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1824 return (0); 1825 } 1826 SCTP_INP_WUNLOCK(inp); 1827 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1828 SCTP_BASE_INFO(hashmark))]; 1829 /* Kick out all non-listeners to the TCP hash */ 1830 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1831 if (tinp->sctp_lport != inp->sctp_lport) { 1832 continue; 1833 } 1834 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1835 continue; 1836 } 1837 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1838 continue; 1839 } 1840 if (SCTP_IS_LISTENING(tinp)) { 1841 continue; 1842 } 1843 SCTP_INP_WLOCK(tinp); 1844 LIST_REMOVE(tinp, sctp_hash); 1845 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1846 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1847 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1848 SCTP_INP_WUNLOCK(tinp); 1849 } 1850 SCTP_INP_WLOCK(inp); 1851 /* Pull from where he was */ 1852 LIST_REMOVE(inp, sctp_hash); 1853 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1854 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1855 LIST_INSERT_HEAD(head, inp, sctp_hash); 1856 return (0); 1857 } 1858 1859 struct sctp_inpcb * 1860 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1861 uint32_t vrf_id) 1862 { 1863 /* 1864 * First we check the hash table to see if someone has this port 1865 * bound with just the port. 1866 */ 1867 struct sctp_inpcb *inp; 1868 struct sctppcbhead *head; 1869 int lport; 1870 unsigned int i; 1871 #ifdef INET 1872 struct sockaddr_in *sin; 1873 #endif 1874 #ifdef INET6 1875 struct sockaddr_in6 *sin6; 1876 #endif 1877 1878 switch (nam->sa_family) { 1879 #ifdef INET 1880 case AF_INET: 1881 sin = (struct sockaddr_in *)nam; 1882 lport = sin->sin_port; 1883 break; 1884 #endif 1885 #ifdef INET6 1886 case AF_INET6: 1887 sin6 = (struct sockaddr_in6 *)nam; 1888 lport = sin6->sin6_port; 1889 break; 1890 #endif 1891 default: 1892 return (NULL); 1893 } 1894 /* 1895 * I could cheat here and just cast to one of the types but we will 1896 * do it right. It also provides the check against an Unsupported 1897 * type too. 1898 */ 1899 /* Find the head of the ALLADDR chain */ 1900 if (have_lock == 0) { 1901 SCTP_INP_INFO_RLOCK(); 1902 } 1903 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1904 SCTP_BASE_INFO(hashmark))]; 1905 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1906 1907 /* 1908 * If the TCP model exists it could be that the main listening 1909 * endpoint is gone but there still exists a connected socket for 1910 * this guy. If so we can return the first one that we find. This 1911 * may NOT be the correct one so the caller should be wary on the 1912 * returned INP. Currently the only caller that sets find_tcp_pool 1913 * is in bindx where we are verifying that a user CAN bind the 1914 * address. He either has bound it already, or someone else has, or 1915 * its open to bind, so this is good enough. 1916 */ 1917 if (inp == NULL && find_tcp_pool) { 1918 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1919 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1920 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1921 if (inp) { 1922 break; 1923 } 1924 } 1925 } 1926 if (inp) { 1927 SCTP_INP_INCR_REF(inp); 1928 } 1929 if (have_lock == 0) { 1930 SCTP_INP_INFO_RUNLOCK(); 1931 } 1932 return (inp); 1933 } 1934 1935 /* 1936 * Find an association for an endpoint with the pointer to whom you want to 1937 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1938 * need to change the *to to some other struct like a mbuf... 1939 */ 1940 struct sctp_tcb * 1941 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1942 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1943 uint32_t vrf_id) 1944 { 1945 struct sctp_inpcb *inp = NULL; 1946 struct sctp_tcb *stcb; 1947 1948 SCTP_INP_INFO_RLOCK(); 1949 if (find_tcp_pool) { 1950 if (inp_p != NULL) { 1951 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1952 vrf_id); 1953 } else { 1954 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1955 vrf_id); 1956 } 1957 if (stcb != NULL) { 1958 SCTP_INP_INFO_RUNLOCK(); 1959 return (stcb); 1960 } 1961 } 1962 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1963 if (inp_p != NULL) { 1964 *inp_p = inp; 1965 } 1966 SCTP_INP_INFO_RUNLOCK(); 1967 if (inp == NULL) { 1968 return (NULL); 1969 } 1970 /* 1971 * ok, we have an endpoint, now lets find the assoc for it (if any) 1972 * we now place the source address or from in the to of the find 1973 * endpoint call. Since in reality this chain is used from the 1974 * inbound packet side. 1975 */ 1976 if (inp_p != NULL) { 1977 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1978 NULL); 1979 } else { 1980 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 1981 NULL); 1982 } 1983 return (stcb); 1984 } 1985 1986 /* 1987 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1988 * find all addresses that the sender has specified in any address list. Each 1989 * address will be used to lookup the TCB and see if one exits. 1990 */ 1991 static struct sctp_tcb * 1992 sctp_findassociation_special_addr(struct mbuf *m, int offset, 1993 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1994 struct sockaddr *dst) 1995 { 1996 struct sctp_paramhdr *phdr, param_buf; 1997 #if defined(INET) || defined(INET6) 1998 struct sctp_tcb *stcb; 1999 uint16_t ptype; 2000 #endif 2001 uint16_t plen; 2002 #ifdef INET 2003 struct sockaddr_in sin4; 2004 #endif 2005 #ifdef INET6 2006 struct sockaddr_in6 sin6; 2007 #endif 2008 2009 #ifdef INET 2010 memset(&sin4, 0, sizeof(sin4)); 2011 sin4.sin_len = sizeof(sin4); 2012 sin4.sin_family = AF_INET; 2013 sin4.sin_port = sh->src_port; 2014 #endif 2015 #ifdef INET6 2016 memset(&sin6, 0, sizeof(sin6)); 2017 sin6.sin6_len = sizeof(sin6); 2018 sin6.sin6_family = AF_INET6; 2019 sin6.sin6_port = sh->src_port; 2020 #endif 2021 2022 offset += sizeof(struct sctp_init_chunk); 2023 2024 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2025 while (phdr != NULL) { 2026 /* now we must see if we want the parameter */ 2027 #if defined(INET) || defined(INET6) 2028 ptype = ntohs(phdr->param_type); 2029 #endif 2030 plen = ntohs(phdr->param_length); 2031 if (plen == 0) { 2032 break; 2033 } 2034 #ifdef INET 2035 if (ptype == SCTP_IPV4_ADDRESS && 2036 plen == sizeof(struct sctp_ipv4addr_param)) { 2037 /* Get the rest of the address */ 2038 struct sctp_ipv4addr_param ip4_param, *p4; 2039 2040 phdr = sctp_get_next_param(m, offset, 2041 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2042 if (phdr == NULL) { 2043 return (NULL); 2044 } 2045 p4 = (struct sctp_ipv4addr_param *)phdr; 2046 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2047 /* look it up */ 2048 stcb = sctp_findassociation_ep_addr(inp_p, 2049 (struct sockaddr *)&sin4, netp, dst, NULL); 2050 if (stcb != NULL) { 2051 return (stcb); 2052 } 2053 } 2054 #endif 2055 #ifdef INET6 2056 if (ptype == SCTP_IPV6_ADDRESS && 2057 plen == sizeof(struct sctp_ipv6addr_param)) { 2058 /* Get the rest of the address */ 2059 struct sctp_ipv6addr_param ip6_param, *p6; 2060 2061 phdr = sctp_get_next_param(m, offset, 2062 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2063 if (phdr == NULL) { 2064 return (NULL); 2065 } 2066 p6 = (struct sctp_ipv6addr_param *)phdr; 2067 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2068 /* look it up */ 2069 stcb = sctp_findassociation_ep_addr(inp_p, 2070 (struct sockaddr *)&sin6, netp, dst, NULL); 2071 if (stcb != NULL) { 2072 return (stcb); 2073 } 2074 } 2075 #endif 2076 offset += SCTP_SIZE32(plen); 2077 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2078 sizeof(param_buf)); 2079 } 2080 return (NULL); 2081 } 2082 2083 static struct sctp_tcb * 2084 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2085 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2086 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2087 { 2088 /* 2089 * Use my vtag to hash. If we find it we then verify the source addr 2090 * is in the assoc. If all goes well we save a bit on rec of a 2091 * packet. 2092 */ 2093 struct sctpasochead *head; 2094 struct sctp_nets *net; 2095 struct sctp_tcb *stcb; 2096 2097 SCTP_INP_INFO_RLOCK(); 2098 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2099 SCTP_BASE_INFO(hashasocmark))]; 2100 LIST_FOREACH(stcb, head, sctp_asocs) { 2101 SCTP_INP_RLOCK(stcb->sctp_ep); 2102 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2103 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2104 continue; 2105 } 2106 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2107 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2108 continue; 2109 } 2110 SCTP_TCB_LOCK(stcb); 2111 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2112 if (stcb->asoc.my_vtag == vtag) { 2113 /* candidate */ 2114 if (stcb->rport != rport) { 2115 SCTP_TCB_UNLOCK(stcb); 2116 continue; 2117 } 2118 if (stcb->sctp_ep->sctp_lport != lport) { 2119 SCTP_TCB_UNLOCK(stcb); 2120 continue; 2121 } 2122 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2123 SCTP_TCB_UNLOCK(stcb); 2124 continue; 2125 } 2126 /* RRS:Need toaddr check here */ 2127 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2128 /* Endpoint does not own this address */ 2129 SCTP_TCB_UNLOCK(stcb); 2130 continue; 2131 } 2132 if (remote_tag) { 2133 /* 2134 * If we have both vtags that's all we match 2135 * on 2136 */ 2137 if (stcb->asoc.peer_vtag == remote_tag) { 2138 /* 2139 * If both tags match we consider it 2140 * conclusive and check NO 2141 * source/destination addresses 2142 */ 2143 goto conclusive; 2144 } 2145 } 2146 if (skip_src_check) { 2147 conclusive: 2148 if (from) { 2149 *netp = sctp_findnet(stcb, from); 2150 } else { 2151 *netp = NULL; /* unknown */ 2152 } 2153 if (inp_p) 2154 *inp_p = stcb->sctp_ep; 2155 SCTP_INP_INFO_RUNLOCK(); 2156 return (stcb); 2157 } 2158 net = sctp_findnet(stcb, from); 2159 if (net) { 2160 /* yep its him. */ 2161 *netp = net; 2162 SCTP_STAT_INCR(sctps_vtagexpress); 2163 *inp_p = stcb->sctp_ep; 2164 SCTP_INP_INFO_RUNLOCK(); 2165 return (stcb); 2166 } else { 2167 /* 2168 * not him, this should only happen in rare 2169 * cases so I peg it. 2170 */ 2171 SCTP_STAT_INCR(sctps_vtagbogus); 2172 } 2173 } 2174 SCTP_TCB_UNLOCK(stcb); 2175 } 2176 SCTP_INP_INFO_RUNLOCK(); 2177 return (NULL); 2178 } 2179 2180 /* 2181 * Find an association with the pointer to the inbound IP packet. This can be 2182 * a IPv4 or IPv6 packet. 2183 */ 2184 struct sctp_tcb * 2185 sctp_findassociation_addr(struct mbuf *m, int offset, 2186 struct sockaddr *src, struct sockaddr *dst, 2187 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2188 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2189 { 2190 struct sctp_tcb *stcb; 2191 struct sctp_inpcb *inp; 2192 2193 if (sh->v_tag) { 2194 /* we only go down this path if vtag is non-zero */ 2195 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2196 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2197 if (stcb) { 2198 return (stcb); 2199 } 2200 } 2201 2202 if (inp_p) { 2203 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2204 1, vrf_id); 2205 inp = *inp_p; 2206 } else { 2207 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2208 1, vrf_id); 2209 } 2210 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2211 if (stcb == NULL && inp) { 2212 /* Found a EP but not this address */ 2213 if ((ch->chunk_type == SCTP_INITIATION) || 2214 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2215 /*- 2216 * special hook, we do NOT return linp or an 2217 * association that is linked to an existing 2218 * association that is under the TCP pool (i.e. no 2219 * listener exists). The endpoint finding routine 2220 * will always find a listener before examining the 2221 * TCP pool. 2222 */ 2223 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2224 if (inp_p) { 2225 *inp_p = NULL; 2226 } 2227 return (NULL); 2228 } 2229 stcb = sctp_findassociation_special_addr(m, 2230 offset, sh, &inp, netp, dst); 2231 if (inp_p != NULL) { 2232 *inp_p = inp; 2233 } 2234 } 2235 } 2236 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2237 return (stcb); 2238 } 2239 2240 /* 2241 * lookup an association by an ASCONF lookup address. 2242 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2243 */ 2244 struct sctp_tcb * 2245 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2246 struct sockaddr *dst, struct sctphdr *sh, 2247 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2248 { 2249 struct sctp_tcb *stcb; 2250 union sctp_sockstore remote_store; 2251 struct sctp_paramhdr param_buf, *phdr; 2252 int ptype; 2253 int zero_address = 0; 2254 #ifdef INET 2255 struct sockaddr_in *sin; 2256 #endif 2257 #ifdef INET6 2258 struct sockaddr_in6 *sin6; 2259 #endif 2260 2261 memset(&remote_store, 0, sizeof(remote_store)); 2262 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2263 ¶m_buf, sizeof(struct sctp_paramhdr)); 2264 if (phdr == NULL) { 2265 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2266 __func__); 2267 return NULL; 2268 } 2269 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2270 /* get the correlation address */ 2271 switch (ptype) { 2272 #ifdef INET6 2273 case SCTP_IPV6_ADDRESS: 2274 { 2275 /* ipv6 address param */ 2276 struct sctp_ipv6addr_param *p6, p6_buf; 2277 2278 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2279 return NULL; 2280 } 2281 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2282 offset + sizeof(struct sctp_asconf_chunk), 2283 &p6_buf.ph, sizeof(p6_buf)); 2284 if (p6 == NULL) { 2285 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2286 __func__); 2287 return (NULL); 2288 } 2289 sin6 = &remote_store.sin6; 2290 sin6->sin6_family = AF_INET6; 2291 sin6->sin6_len = sizeof(*sin6); 2292 sin6->sin6_port = sh->src_port; 2293 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2294 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2295 zero_address = 1; 2296 break; 2297 } 2298 #endif 2299 #ifdef INET 2300 case SCTP_IPV4_ADDRESS: 2301 { 2302 /* ipv4 address param */ 2303 struct sctp_ipv4addr_param *p4, p4_buf; 2304 2305 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2306 return NULL; 2307 } 2308 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2309 offset + sizeof(struct sctp_asconf_chunk), 2310 &p4_buf.ph, sizeof(p4_buf)); 2311 if (p4 == NULL) { 2312 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2313 __func__); 2314 return (NULL); 2315 } 2316 sin = &remote_store.sin; 2317 sin->sin_family = AF_INET; 2318 sin->sin_len = sizeof(*sin); 2319 sin->sin_port = sh->src_port; 2320 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2321 if (sin->sin_addr.s_addr == INADDR_ANY) 2322 zero_address = 1; 2323 break; 2324 } 2325 #endif 2326 default: 2327 /* invalid address param type */ 2328 return NULL; 2329 } 2330 2331 if (zero_address) { 2332 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2333 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2334 if (stcb != NULL) { 2335 SCTP_INP_DECR_REF(*inp_p); 2336 } 2337 } else { 2338 stcb = sctp_findassociation_ep_addr(inp_p, 2339 &remote_store.sa, netp, 2340 dst, NULL); 2341 } 2342 return (stcb); 2343 } 2344 2345 /* 2346 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2347 * addresses. This way if we don't get a bind we by default pick a ephemeral 2348 * port with all addresses bound. 2349 */ 2350 int 2351 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2352 { 2353 /* 2354 * we get called when a new endpoint starts up. We need to allocate 2355 * the sctp_inpcb structure from the zone and init it. Mark it as 2356 * unbound and find a port that we can use as an ephemeral with 2357 * INADDR_ANY. If the user binds later no problem we can then add in 2358 * the specific addresses. And setup the default parameters for the 2359 * EP. 2360 */ 2361 int i, error; 2362 struct sctp_inpcb *inp; 2363 struct sctp_pcb *m; 2364 struct timeval time; 2365 sctp_sharedkey_t *null_key; 2366 2367 error = 0; 2368 2369 SCTP_INP_INFO_WLOCK(); 2370 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2371 if (inp == NULL) { 2372 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2373 SCTP_INP_INFO_WUNLOCK(); 2374 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2375 return (ENOBUFS); 2376 } 2377 /* zap it */ 2378 memset(inp, 0, sizeof(*inp)); 2379 2380 /* bump generations */ 2381 /* setup socket pointers */ 2382 inp->sctp_socket = so; 2383 inp->ip_inp.inp.inp_socket = so; 2384 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2385 #ifdef INET6 2386 if (INP_SOCKAF(so) == AF_INET6) { 2387 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2388 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2389 } 2390 if (MODULE_GLOBAL(ip6_v6only)) { 2391 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2392 } 2393 } 2394 #endif 2395 inp->sctp_associd_counter = 1; 2396 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2397 inp->sctp_frag_point = 0; 2398 inp->max_cwnd = 0; 2399 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2400 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2401 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2402 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2403 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2404 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2405 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2406 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2407 inp->idata_supported = 0; 2408 inp->rcv_edmid = SCTP_EDMID_NONE; 2409 2410 inp->fibnum = so->so_fibnum; 2411 /* init the small hash table we use to track asocid <-> tcb */ 2412 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2413 if (inp->sctp_asocidhash == NULL) { 2414 crfree(inp->ip_inp.inp.inp_cred); 2415 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2416 SCTP_INP_INFO_WUNLOCK(); 2417 return (ENOBUFS); 2418 } 2419 SCTP_INCR_EP_COUNT(); 2420 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2421 SCTP_INP_INFO_WUNLOCK(); 2422 2423 so->so_pcb = (caddr_t)inp; 2424 2425 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2426 /* UDP style socket */ 2427 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2428 SCTP_PCB_FLAGS_UNBOUND); 2429 /* Be sure it is NON-BLOCKING IO for UDP */ 2430 /* SCTP_SET_SO_NBIO(so); */ 2431 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2432 /* TCP style socket */ 2433 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2434 SCTP_PCB_FLAGS_UNBOUND); 2435 /* Be sure we have blocking IO by default */ 2436 SOCK_LOCK(so); 2437 SCTP_CLEAR_SO_NBIO(so); 2438 SOCK_UNLOCK(so); 2439 } else { 2440 /* 2441 * unsupported socket type (RAW, etc)- in case we missed it 2442 * in protosw 2443 */ 2444 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2445 so->so_pcb = NULL; 2446 crfree(inp->ip_inp.inp.inp_cred); 2447 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2448 return (EOPNOTSUPP); 2449 } 2450 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2451 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2452 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2453 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2454 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2455 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2456 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2457 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2458 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2459 } 2460 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2461 &inp->sctp_hashmark); 2462 if (inp->sctp_tcbhash == NULL) { 2463 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2464 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2465 so->so_pcb = NULL; 2466 crfree(inp->ip_inp.inp.inp_cred); 2467 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2468 return (ENOBUFS); 2469 } 2470 inp->def_vrf_id = vrf_id; 2471 2472 SCTP_INP_INFO_WLOCK(); 2473 SCTP_INP_LOCK_INIT(inp); 2474 rw_init_flags(&inp->ip_inp.inp.inp_lock, "sctpinp", 2475 RW_RECURSE | RW_DUPOK); 2476 SCTP_INP_READ_LOCK_INIT(inp); 2477 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2478 /* lock the new ep */ 2479 SCTP_INP_WLOCK(inp); 2480 2481 /* add it to the info area */ 2482 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2483 SCTP_INP_INFO_WUNLOCK(); 2484 2485 TAILQ_INIT(&inp->read_queue); 2486 LIST_INIT(&inp->sctp_addr_list); 2487 2488 LIST_INIT(&inp->sctp_asoc_list); 2489 2490 #ifdef SCTP_TRACK_FREED_ASOCS 2491 /* TEMP CODE */ 2492 LIST_INIT(&inp->sctp_asoc_free_list); 2493 #endif 2494 /* Init the timer structure for signature change */ 2495 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2496 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2497 2498 /* now init the actual endpoint default data */ 2499 m = &inp->sctp_ep; 2500 2501 /* setup the base timeout information */ 2502 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2503 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2504 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2505 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2506 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2507 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2508 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2509 /* all max/min max are in ms */ 2510 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2511 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2512 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2513 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2514 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2515 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2516 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2517 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2518 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2519 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2520 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2521 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2522 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2523 2524 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2525 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2526 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2527 /* number of streams to pre-open on a association */ 2528 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2529 2530 m->default_mtu = 0; 2531 /* Add adaptation cookie */ 2532 m->adaptation_layer_indicator = 0; 2533 m->adaptation_layer_indicator_provided = 0; 2534 2535 /* seed random number generator */ 2536 m->random_counter = 1; 2537 m->store_at = SCTP_SIGNATURE_SIZE; 2538 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2539 sctp_fill_random_store(m); 2540 2541 /* Minimum cookie size */ 2542 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2543 sizeof(struct sctp_state_cookie); 2544 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2545 2546 /* Setup the initial secret */ 2547 (void)SCTP_GETTIME_TIMEVAL(&time); 2548 m->time_of_secret_change = time.tv_sec; 2549 2550 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2551 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2552 } 2553 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2554 2555 /* How long is a cookie good for ? */ 2556 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2557 /* 2558 * Initialize authentication parameters 2559 */ 2560 m->local_hmacs = sctp_default_supported_hmaclist(); 2561 m->local_auth_chunks = sctp_alloc_chunklist(); 2562 if (inp->asconf_supported) { 2563 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2564 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2565 } 2566 m->default_dscp = 0; 2567 #ifdef INET6 2568 m->default_flowlabel = 0; 2569 #endif 2570 m->port = 0; /* encapsulation disabled by default */ 2571 LIST_INIT(&m->shared_keys); 2572 /* add default NULL key as key id 0 */ 2573 null_key = sctp_alloc_sharedkey(); 2574 sctp_insert_sharedkey(&m->shared_keys, null_key); 2575 SCTP_INP_WUNLOCK(inp); 2576 #ifdef SCTP_LOG_CLOSING 2577 sctp_log_closing(inp, NULL, 12); 2578 #endif 2579 return (error); 2580 } 2581 2582 void 2583 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2584 struct sctp_tcb *stcb) 2585 { 2586 struct sctp_nets *net; 2587 uint16_t lport, rport; 2588 struct sctppcbhead *head; 2589 struct sctp_laddr *laddr, *oladdr; 2590 2591 atomic_add_int(&stcb->asoc.refcnt, 1); 2592 SCTP_TCB_UNLOCK(stcb); 2593 SCTP_INP_INFO_WLOCK(); 2594 SCTP_INP_WLOCK(old_inp); 2595 SCTP_INP_WLOCK(new_inp); 2596 SCTP_TCB_LOCK(stcb); 2597 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2598 2599 #ifdef INET6 2600 if (old_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2601 new_inp->ip_inp.inp.inp_flags |= old_inp->ip_inp.inp.inp_flags & INP_CONTROLOPTS; 2602 if (old_inp->ip_inp.inp.in6p_outputopts) { 2603 new_inp->ip_inp.inp.in6p_outputopts = ip6_copypktopts(old_inp->ip_inp.inp.in6p_outputopts, M_NOWAIT); 2604 } 2605 } 2606 #endif 2607 #if defined(INET) && defined(INET6) 2608 else 2609 #endif 2610 #ifdef INET 2611 { 2612 new_inp->ip_inp.inp.inp_ip_tos = old_inp->ip_inp.inp.inp_ip_tos; 2613 new_inp->ip_inp.inp.inp_ip_ttl = old_inp->ip_inp.inp.inp_ip_ttl; 2614 } 2615 #endif 2616 new_inp->sctp_ep.time_of_secret_change = 2617 old_inp->sctp_ep.time_of_secret_change; 2618 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2619 sizeof(old_inp->sctp_ep.secret_key)); 2620 new_inp->sctp_ep.current_secret_number = 2621 old_inp->sctp_ep.current_secret_number; 2622 new_inp->sctp_ep.last_secret_number = 2623 old_inp->sctp_ep.last_secret_number; 2624 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2625 2626 /* make it so new data pours into the new socket */ 2627 stcb->sctp_socket = new_inp->sctp_socket; 2628 stcb->sctp_ep = new_inp; 2629 2630 /* Copy the port across */ 2631 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2632 rport = stcb->rport; 2633 /* Pull the tcb from the old association */ 2634 LIST_REMOVE(stcb, sctp_tcbhash); 2635 LIST_REMOVE(stcb, sctp_tcblist); 2636 if (stcb->asoc.in_asocid_hash) { 2637 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2638 } 2639 /* Now insert the new_inp into the TCP connected hash */ 2640 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2641 2642 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2643 /* Its safe to access */ 2644 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2645 2646 /* Now move the tcb into the endpoint list */ 2647 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2648 /* 2649 * Question, do we even need to worry about the ep-hash since we 2650 * only have one connection? Probably not :> so lets get rid of it 2651 * and not suck up any kernel memory in that. 2652 */ 2653 if (stcb->asoc.in_asocid_hash) { 2654 struct sctpasochead *lhd; 2655 2656 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2657 new_inp->hashasocidmark)]; 2658 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2659 } 2660 /* Ok. Let's restart timer. */ 2661 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2662 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2663 stcb, net); 2664 } 2665 2666 SCTP_INP_INFO_WUNLOCK(); 2667 if (new_inp->sctp_tcbhash != NULL) { 2668 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2669 new_inp->sctp_tcbhash = NULL; 2670 } 2671 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2672 /* Subset bound, so copy in the laddr list from the old_inp */ 2673 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2674 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2675 if (laddr == NULL) { 2676 /* 2677 * Gak, what can we do? This assoc is really 2678 * HOSED. We probably should send an abort 2679 * here. 2680 */ 2681 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2682 continue; 2683 } 2684 SCTP_INCR_LADDR_COUNT(); 2685 memset(laddr, 0, sizeof(*laddr)); 2686 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2687 laddr->ifa = oladdr->ifa; 2688 atomic_add_int(&laddr->ifa->refcount, 1); 2689 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2690 sctp_nxt_addr); 2691 new_inp->laddr_count++; 2692 if (oladdr == stcb->asoc.last_used_address) { 2693 stcb->asoc.last_used_address = laddr; 2694 } 2695 } 2696 } 2697 /* Now any running timers need to be adjusted. */ 2698 if (stcb->asoc.dack_timer.ep == old_inp) { 2699 SCTP_INP_DECR_REF(old_inp); 2700 stcb->asoc.dack_timer.ep = new_inp; 2701 SCTP_INP_INCR_REF(new_inp); 2702 } 2703 if (stcb->asoc.asconf_timer.ep == old_inp) { 2704 SCTP_INP_DECR_REF(old_inp); 2705 stcb->asoc.asconf_timer.ep = new_inp; 2706 SCTP_INP_INCR_REF(new_inp); 2707 } 2708 if (stcb->asoc.strreset_timer.ep == old_inp) { 2709 SCTP_INP_DECR_REF(old_inp); 2710 stcb->asoc.strreset_timer.ep = new_inp; 2711 SCTP_INP_INCR_REF(new_inp); 2712 } 2713 if (stcb->asoc.shut_guard_timer.ep == old_inp) { 2714 SCTP_INP_DECR_REF(old_inp); 2715 stcb->asoc.shut_guard_timer.ep = new_inp; 2716 SCTP_INP_INCR_REF(new_inp); 2717 } 2718 if (stcb->asoc.autoclose_timer.ep == old_inp) { 2719 SCTP_INP_DECR_REF(old_inp); 2720 stcb->asoc.autoclose_timer.ep = new_inp; 2721 SCTP_INP_INCR_REF(new_inp); 2722 } 2723 if (stcb->asoc.delete_prim_timer.ep == old_inp) { 2724 SCTP_INP_DECR_REF(old_inp); 2725 stcb->asoc.delete_prim_timer.ep = new_inp; 2726 SCTP_INP_INCR_REF(new_inp); 2727 } 2728 /* now what about the nets? */ 2729 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2730 if (net->pmtu_timer.ep == old_inp) { 2731 SCTP_INP_DECR_REF(old_inp); 2732 net->pmtu_timer.ep = new_inp; 2733 SCTP_INP_INCR_REF(new_inp); 2734 } 2735 if (net->hb_timer.ep == old_inp) { 2736 SCTP_INP_DECR_REF(old_inp); 2737 net->hb_timer.ep = new_inp; 2738 SCTP_INP_INCR_REF(new_inp); 2739 } 2740 if (net->rxt_timer.ep == old_inp) { 2741 SCTP_INP_DECR_REF(old_inp); 2742 net->rxt_timer.ep = new_inp; 2743 SCTP_INP_INCR_REF(new_inp); 2744 } 2745 } 2746 SCTP_INP_WUNLOCK(new_inp); 2747 SCTP_INP_WUNLOCK(old_inp); 2748 } 2749 2750 /* 2751 * insert an laddr entry with the given ifa for the desired list 2752 */ 2753 static int 2754 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2755 { 2756 struct sctp_laddr *laddr; 2757 2758 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2759 if (laddr == NULL) { 2760 /* out of memory? */ 2761 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2762 return (EINVAL); 2763 } 2764 SCTP_INCR_LADDR_COUNT(); 2765 memset(laddr, 0, sizeof(*laddr)); 2766 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2767 laddr->ifa = ifa; 2768 laddr->action = act; 2769 atomic_add_int(&ifa->refcount, 1); 2770 /* insert it */ 2771 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2772 2773 return (0); 2774 } 2775 2776 /* 2777 * Remove an laddr entry from the local address list (on an assoc) 2778 */ 2779 static void 2780 sctp_remove_laddr(struct sctp_laddr *laddr) 2781 { 2782 2783 /* remove from the list */ 2784 LIST_REMOVE(laddr, sctp_nxt_addr); 2785 sctp_free_ifa(laddr->ifa); 2786 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2787 SCTP_DECR_LADDR_COUNT(); 2788 } 2789 2790 /* 2791 * Bind the socket, with the PCB and global info locks held. Note, if a 2792 * socket address is specified, the PCB lock may be dropped and re-acquired. 2793 * 2794 * sctp_ifap is used to bypass normal local address validation checks. 2795 */ 2796 int 2797 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr, 2798 struct sctp_ifa *sctp_ifap, struct thread *td) 2799 { 2800 /* bind a ep to a socket address */ 2801 struct sctppcbhead *head; 2802 struct sctp_inpcb *inp_tmp; 2803 struct inpcb *ip_inp; 2804 int port_reuse_active = 0; 2805 int bindall; 2806 uint16_t lport; 2807 int error; 2808 uint32_t vrf_id; 2809 2810 KASSERT(td != NULL, ("%s: null thread", __func__)); 2811 2812 error = 0; 2813 lport = 0; 2814 bindall = 1; 2815 ip_inp = &inp->ip_inp.inp; 2816 2817 SCTP_INP_INFO_WLOCK_ASSERT(); 2818 SCTP_INP_WLOCK_ASSERT(inp); 2819 2820 #ifdef SCTP_DEBUG 2821 if (addr) { 2822 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2823 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2824 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2825 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2826 } 2827 #endif 2828 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2829 error = EINVAL; 2830 /* already did a bind, subsequent binds NOT allowed ! */ 2831 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2832 goto out; 2833 } 2834 if (addr != NULL) { 2835 switch (addr->sa_family) { 2836 #ifdef INET 2837 case AF_INET: 2838 { 2839 struct sockaddr_in *sin; 2840 2841 /* IPV6_V6ONLY socket? */ 2842 if (SCTP_IPV6_V6ONLY(inp)) { 2843 error = EINVAL; 2844 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2845 goto out; 2846 } 2847 if (addr->sa_len != sizeof(*sin)) { 2848 error = EINVAL; 2849 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2850 goto out; 2851 } 2852 2853 sin = (struct sockaddr_in *)addr; 2854 lport = sin->sin_port; 2855 /* 2856 * For LOOPBACK the prison_local_ip4() call 2857 * will transmute the ip address to the 2858 * proper value. 2859 */ 2860 if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) { 2861 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2862 goto out; 2863 } 2864 if (sin->sin_addr.s_addr != INADDR_ANY) { 2865 bindall = 0; 2866 } 2867 break; 2868 } 2869 #endif 2870 #ifdef INET6 2871 case AF_INET6: 2872 { 2873 /* 2874 * Only for pure IPv6 Address. (No IPv4 2875 * Mapped!) 2876 */ 2877 struct sockaddr_in6 *sin6; 2878 2879 sin6 = (struct sockaddr_in6 *)addr; 2880 if (addr->sa_len != sizeof(*sin6)) { 2881 error = EINVAL; 2882 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2883 goto out; 2884 } 2885 lport = sin6->sin6_port; 2886 /* 2887 * For LOOPBACK the prison_local_ip6() call 2888 * will transmute the ipv6 address to the 2889 * proper value. 2890 */ 2891 if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr, 2892 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2893 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2894 goto out; 2895 } 2896 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2897 bindall = 0; 2898 /* KAME hack: embed scopeid */ 2899 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2900 error = EINVAL; 2901 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2902 goto out; 2903 } 2904 } 2905 /* this must be cleared for ifa_ifwithaddr() */ 2906 sin6->sin6_scope_id = 0; 2907 break; 2908 } 2909 #endif 2910 default: 2911 error = EAFNOSUPPORT; 2912 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2913 goto out; 2914 } 2915 } 2916 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2917 vrf_id = inp->def_vrf_id; 2918 2919 if (lport) { 2920 /* 2921 * Did the caller specify a port? if so we must see if an ep 2922 * already has this one bound. 2923 */ 2924 /* got to be root to get at low ports */ 2925 if (ntohs(lport) < IPPORT_RESERVED && 2926 (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 2927 goto out; 2928 } 2929 SCTP_INP_INCR_REF(inp); 2930 SCTP_INP_WUNLOCK(inp); 2931 if (bindall) { 2932 vrf_id = inp->def_vrf_id; 2933 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2934 if (inp_tmp != NULL) { 2935 /* 2936 * lock guy returned and lower count note 2937 * that we are not bound so inp_tmp should 2938 * NEVER be inp. And it is this inp 2939 * (inp_tmp) that gets the reference bump, 2940 * so we must lower it. 2941 */ 2942 SCTP_INP_DECR_REF(inp_tmp); 2943 /* unlock info */ 2944 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2945 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2946 /* 2947 * Ok, must be one-2-one and 2948 * allowing port re-use 2949 */ 2950 port_reuse_active = 1; 2951 goto continue_anyway; 2952 } 2953 SCTP_INP_WLOCK(inp); 2954 SCTP_INP_DECR_REF(inp); 2955 error = EADDRINUSE; 2956 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2957 goto out; 2958 } 2959 } else { 2960 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2961 if (inp_tmp != NULL) { 2962 /* 2963 * lock guy returned and lower count note 2964 * that we are not bound so inp_tmp should 2965 * NEVER be inp. And it is this inp 2966 * (inp_tmp) that gets the reference bump, 2967 * so we must lower it. 2968 */ 2969 SCTP_INP_DECR_REF(inp_tmp); 2970 /* unlock info */ 2971 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2972 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2973 /* 2974 * Ok, must be one-2-one and 2975 * allowing port re-use 2976 */ 2977 port_reuse_active = 1; 2978 goto continue_anyway; 2979 } 2980 SCTP_INP_WLOCK(inp); 2981 SCTP_INP_DECR_REF(inp); 2982 error = EADDRINUSE; 2983 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2984 goto out; 2985 } 2986 } 2987 continue_anyway: 2988 SCTP_INP_WLOCK(inp); 2989 SCTP_INP_DECR_REF(inp); 2990 if (bindall) { 2991 /* verify that no lport is not used by a singleton */ 2992 if ((port_reuse_active == 0) && 2993 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2994 /* Sorry someone already has this one bound */ 2995 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2996 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2997 port_reuse_active = 1; 2998 } else { 2999 error = EADDRINUSE; 3000 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3001 goto out; 3002 } 3003 } 3004 } 3005 } else { 3006 uint16_t first, last, candidate; 3007 uint16_t count; 3008 3009 if (ip_inp->inp_flags & INP_HIGHPORT) { 3010 first = MODULE_GLOBAL(ipport_hifirstauto); 3011 last = MODULE_GLOBAL(ipport_hilastauto); 3012 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3013 if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 3014 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3015 goto out; 3016 } 3017 first = MODULE_GLOBAL(ipport_lowfirstauto); 3018 last = MODULE_GLOBAL(ipport_lowlastauto); 3019 } else { 3020 first = MODULE_GLOBAL(ipport_firstauto); 3021 last = MODULE_GLOBAL(ipport_lastauto); 3022 } 3023 if (first > last) { 3024 uint16_t temp; 3025 3026 temp = first; 3027 first = last; 3028 last = temp; 3029 } 3030 count = last - first + 1; /* number of candidates */ 3031 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3032 3033 for (;;) { 3034 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3035 lport = htons(candidate); 3036 break; 3037 } 3038 if (--count == 0) { 3039 error = EADDRINUSE; 3040 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3041 goto out; 3042 } 3043 if (candidate == last) 3044 candidate = first; 3045 else 3046 candidate = candidate + 1; 3047 } 3048 } 3049 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3050 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3051 /* 3052 * this really should not happen. The guy did a non-blocking 3053 * bind and then did a close at the same time. 3054 */ 3055 error = EINVAL; 3056 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3057 goto out; 3058 } 3059 /* ok we look clear to give out this port, so lets setup the binding */ 3060 if (bindall) { 3061 /* binding to all addresses, so just set in the proper flags */ 3062 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3063 /* set the automatic addr changes from kernel flag */ 3064 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3065 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3066 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3067 } else { 3068 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3069 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3070 } 3071 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3072 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3073 } else { 3074 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3075 } 3076 /* 3077 * set the automatic mobility_base from kernel flag (by 3078 * micchie) 3079 */ 3080 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3081 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3082 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3083 } else { 3084 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3085 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3086 } 3087 /* 3088 * set the automatic mobility_fasthandoff from kernel flag 3089 * (by micchie) 3090 */ 3091 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3092 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3093 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3094 } else { 3095 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3096 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3097 } 3098 } else { 3099 /* 3100 * bind specific, make sure flags is off and add a new 3101 * address structure to the sctp_addr_list inside the ep 3102 * structure. 3103 * 3104 * We will need to allocate one and insert it at the head. 3105 * The socketopt call can just insert new addresses in there 3106 * as well. It will also have to do the embed scope kame 3107 * hack too (before adding). 3108 */ 3109 struct sctp_ifa *ifa; 3110 union sctp_sockstore store; 3111 3112 memset(&store, 0, sizeof(store)); 3113 switch (addr->sa_family) { 3114 #ifdef INET 3115 case AF_INET: 3116 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3117 store.sin.sin_port = 0; 3118 break; 3119 #endif 3120 #ifdef INET6 3121 case AF_INET6: 3122 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3123 store.sin6.sin6_port = 0; 3124 break; 3125 #endif 3126 default: 3127 break; 3128 } 3129 /* 3130 * first find the interface with the bound address need to 3131 * zero out the port to find the address! yuck! can't do 3132 * this earlier since need port for sctp_pcb_findep() 3133 */ 3134 if (sctp_ifap != NULL) { 3135 ifa = sctp_ifap; 3136 } else { 3137 /* 3138 * Note for BSD we hit here always other O/S's will 3139 * pass things in via the sctp_ifap argument. 3140 */ 3141 ifa = sctp_find_ifa_by_addr(&store.sa, 3142 vrf_id, SCTP_ADDR_NOT_LOCKED); 3143 } 3144 if (ifa == NULL) { 3145 error = EADDRNOTAVAIL; 3146 /* Can't find an interface with that address */ 3147 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3148 goto out; 3149 } 3150 #ifdef INET6 3151 if (addr->sa_family == AF_INET6) { 3152 /* GAK, more FIXME IFA lock? */ 3153 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3154 /* Can't bind a non-existent addr. */ 3155 error = EINVAL; 3156 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3157 goto out; 3158 } 3159 } 3160 #endif 3161 /* we're not bound all */ 3162 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3163 /* allow bindx() to send ASCONF's for binding changes */ 3164 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3165 /* clear automatic addr changes from kernel flag */ 3166 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3167 3168 /* add this address to the endpoint list */ 3169 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3170 if (error != 0) 3171 goto out; 3172 inp->laddr_count++; 3173 } 3174 /* find the bucket */ 3175 if (port_reuse_active) { 3176 /* Put it into tcp 1-2-1 hash */ 3177 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3178 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3179 } else { 3180 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3181 } 3182 /* put it in the bucket */ 3183 LIST_INSERT_HEAD(head, inp, sctp_hash); 3184 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3185 (void *)head, ntohs(lport), port_reuse_active); 3186 /* set in the port */ 3187 inp->sctp_lport = lport; 3188 3189 /* turn off just the unbound flag */ 3190 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0, 3191 ("%s: inp %p is already bound", __func__, inp)); 3192 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3193 out: 3194 return (error); 3195 } 3196 3197 int 3198 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 3199 struct sctp_ifa *sctp_ifap, struct thread *td) 3200 { 3201 struct sctp_inpcb *inp; 3202 int error; 3203 3204 inp = so->so_pcb; 3205 SCTP_INP_INFO_WLOCK(); 3206 SCTP_INP_WLOCK(inp); 3207 error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td); 3208 SCTP_INP_WUNLOCK(inp); 3209 SCTP_INP_INFO_WUNLOCK(); 3210 return (error); 3211 } 3212 3213 static void 3214 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3215 { 3216 struct sctp_iterator *it, *nit; 3217 3218 /* 3219 * We enter with the only the ITERATOR_LOCK in place and a write 3220 * lock on the inp_info stuff. 3221 */ 3222 it = sctp_it_ctl.cur_it; 3223 if (it && (it->vn != curvnet)) { 3224 /* Its not looking at our VNET */ 3225 return; 3226 } 3227 if (it && (it->inp == inp)) { 3228 /* 3229 * This is tricky and we hold the iterator lock, but when it 3230 * returns and gets the lock (when we release it) the 3231 * iterator will try to operate on inp. We need to stop that 3232 * from happening. But of course the iterator has a 3233 * reference on the stcb and inp. We can mark it and it will 3234 * stop. 3235 * 3236 * If its a single iterator situation, we set the end 3237 * iterator flag. Otherwise we set the iterator to go to the 3238 * next inp. 3239 * 3240 */ 3241 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3242 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3243 } else { 3244 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3245 } 3246 } 3247 /* 3248 * Now go through and remove any single reference to our inp that 3249 * may be still pending on the list 3250 */ 3251 SCTP_IPI_ITERATOR_WQ_LOCK(); 3252 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3253 if (it->vn != curvnet) { 3254 continue; 3255 } 3256 if (it->inp == inp) { 3257 /* This one points to me is it inp specific? */ 3258 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3259 /* Remove and free this one */ 3260 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3261 it, sctp_nxt_itr); 3262 if (it->function_atend != NULL) { 3263 (*it->function_atend) (it->pointer, it->val); 3264 } 3265 SCTP_FREE(it, SCTP_M_ITER); 3266 } else { 3267 it->inp = LIST_NEXT(it->inp, sctp_list); 3268 if (it->inp) { 3269 SCTP_INP_INCR_REF(it->inp); 3270 } 3271 } 3272 /* 3273 * When its put in the refcnt is incremented so decr 3274 * it 3275 */ 3276 SCTP_INP_DECR_REF(inp); 3277 } 3278 } 3279 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3280 } 3281 3282 /* release sctp_inpcb unbind the port */ 3283 void 3284 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3285 { 3286 /* 3287 * Here we free a endpoint. We must find it (if it is in the Hash 3288 * table) and remove it from there. Then we must also find it in the 3289 * overall list and remove it from there. After all removals are 3290 * complete then any timer has to be stopped. Then start the actual 3291 * freeing. a) Any local lists. b) Any associations. c) The hash of 3292 * all associations. d) finally the ep itself. 3293 */ 3294 struct sctp_tcb *stcb, *nstcb; 3295 struct sctp_laddr *laddr, *nladdr; 3296 struct inpcb *ip_pcb; 3297 struct socket *so; 3298 int being_refed = 0; 3299 struct sctp_queued_to_read *sq, *nsq; 3300 int cnt; 3301 sctp_sharedkey_t *shared_key, *nshared_key; 3302 3303 #ifdef SCTP_LOG_CLOSING 3304 sctp_log_closing(inp, NULL, 0); 3305 #endif 3306 SCTP_ITERATOR_LOCK(); 3307 /* mark any iterators on the list or being processed */ 3308 sctp_iterator_inp_being_freed(inp); 3309 SCTP_ITERATOR_UNLOCK(); 3310 3311 SCTP_ASOC_CREATE_LOCK(inp); 3312 SCTP_INP_INFO_WLOCK(); 3313 SCTP_INP_WLOCK(inp); 3314 so = inp->sctp_socket; 3315 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0, 3316 ("%s: inp %p still has socket", __func__, inp)); 3317 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0, 3318 ("%s: double free of inp %p", __func__, inp)); 3319 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3320 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3321 /* socket is gone, so no more wakeups allowed */ 3322 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3323 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3324 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3325 } 3326 /* First time through we have the socket lock, after that no more. */ 3327 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3328 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3329 3330 if (inp->control) { 3331 sctp_m_freem(inp->control); 3332 inp->control = NULL; 3333 } 3334 if (inp->pkt) { 3335 sctp_m_freem(inp->pkt); 3336 inp->pkt = NULL; 3337 } 3338 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3339 * here but I will be nice :> (i.e. 3340 * ip_pcb = ep;) */ 3341 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3342 int cnt_in_sd; 3343 3344 cnt_in_sd = 0; 3345 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) { 3346 SCTP_TCB_LOCK(stcb); 3347 /* Disconnect the socket please. */ 3348 stcb->sctp_socket = NULL; 3349 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET); 3350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3351 /* Skip guys being freed */ 3352 cnt_in_sd++; 3353 if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3354 /* 3355 * Special case - we did not start a 3356 * kill timer on the asoc due to it 3357 * was not closed. So go ahead and 3358 * start it now. 3359 */ 3360 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 3361 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3362 } 3363 SCTP_TCB_UNLOCK(stcb); 3364 continue; 3365 } 3366 if (((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) || 3367 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) && 3368 (stcb->asoc.total_output_queue_size == 0)) { 3369 /* 3370 * If we have data in queue, we don't want 3371 * to just free since the app may have done, 3372 * send()/close or connect/send/close. And 3373 * it wants the data to get across first. 3374 */ 3375 /* Just abandon things in the front states */ 3376 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_NOFORCE, 3377 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3378 cnt_in_sd++; 3379 } 3380 continue; 3381 } 3382 if ((stcb->asoc.size_on_reasm_queue > 0) || 3383 (stcb->asoc.size_on_all_streams > 0) || 3384 ((so != NULL) && (SCTP_SBAVAIL(&so->so_rcv) > 0))) { 3385 /* Left with Data unread */ 3386 struct mbuf *op_err; 3387 3388 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3389 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3390 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); 3391 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3392 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3393 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3394 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3395 } 3396 if (sctp_free_assoc(inp, stcb, 3397 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3398 cnt_in_sd++; 3399 } 3400 continue; 3401 } else if (TAILQ_EMPTY(&stcb->asoc.send_queue) && 3402 TAILQ_EMPTY(&stcb->asoc.sent_queue) && 3403 (stcb->asoc.stream_queue_cnt == 0)) { 3404 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) { 3405 goto abort_anyway; 3406 } 3407 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) && 3408 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3409 struct sctp_nets *netp; 3410 3411 /* 3412 * there is nothing queued to send, 3413 * so I send shutdown 3414 */ 3415 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3416 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3417 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3418 } 3419 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT); 3420 sctp_stop_timers_for_shutdown(stcb); 3421 if (stcb->asoc.alternate) { 3422 netp = stcb->asoc.alternate; 3423 } else { 3424 netp = stcb->asoc.primary_destination; 3425 } 3426 sctp_send_shutdown(stcb, netp); 3427 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 3428 netp); 3429 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL); 3430 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3431 } 3432 } else { 3433 /* mark into shutdown pending */ 3434 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING); 3435 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) { 3436 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT); 3437 } 3438 if (TAILQ_EMPTY(&stcb->asoc.send_queue) && 3439 TAILQ_EMPTY(&stcb->asoc.sent_queue) && 3440 (stcb->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3441 struct mbuf *op_err; 3442 3443 abort_anyway: 3444 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3445 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3446 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); 3447 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3448 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3449 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3450 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3451 } 3452 if (sctp_free_assoc(inp, stcb, 3453 SCTP_PCBFREE_NOFORCE, 3454 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3455 cnt_in_sd++; 3456 } 3457 continue; 3458 } else { 3459 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3460 } 3461 } 3462 cnt_in_sd++; 3463 SCTP_TCB_UNLOCK(stcb); 3464 } 3465 /* now is there some left in our SHUTDOWN state? */ 3466 if (cnt_in_sd) { 3467 #ifdef SCTP_LOG_CLOSING 3468 sctp_log_closing(inp, NULL, 2); 3469 #endif 3470 inp->sctp_socket = NULL; 3471 SCTP_INP_WUNLOCK(inp); 3472 SCTP_ASOC_CREATE_UNLOCK(inp); 3473 SCTP_INP_INFO_WUNLOCK(); 3474 return; 3475 } 3476 } 3477 inp->sctp_socket = NULL; 3478 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 3479 /* 3480 * ok, this guy has been bound. It's port is somewhere in 3481 * the SCTP_BASE_INFO(hash table). Remove it! 3482 */ 3483 LIST_REMOVE(inp, sctp_hash); 3484 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3485 } 3486 3487 /* 3488 * If there is a timer running to kill us, forget it, since it may 3489 * have a contest on the INP lock.. which would cause us to die ... 3490 */ 3491 cnt = 0; 3492 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) { 3493 SCTP_TCB_LOCK(stcb); 3494 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3495 /* Disconnect the socket please */ 3496 stcb->sctp_socket = NULL; 3497 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET); 3498 } 3499 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3500 if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3501 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 3502 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3503 } 3504 cnt++; 3505 SCTP_TCB_UNLOCK(stcb); 3506 continue; 3507 } 3508 /* Free associations that are NOT killing us */ 3509 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) && 3510 ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3511 struct mbuf *op_err; 3512 3513 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3514 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3515 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); 3516 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3517 } else if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3518 cnt++; 3519 SCTP_TCB_UNLOCK(stcb); 3520 continue; 3521 } 3522 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3523 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3524 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3525 } 3526 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, 3527 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3528 cnt++; 3529 } 3530 } 3531 if (cnt) { 3532 /* Ok we have someone out there that will kill us */ 3533 #ifdef SCTP_LOG_CLOSING 3534 sctp_log_closing(inp, NULL, 3); 3535 #endif 3536 SCTP_INP_WUNLOCK(inp); 3537 SCTP_ASOC_CREATE_UNLOCK(inp); 3538 SCTP_INP_INFO_WUNLOCK(); 3539 return; 3540 } 3541 if (SCTP_INP_LOCK_CONTENDED(inp)) 3542 being_refed++; 3543 if (SCTP_INP_READ_CONTENDED(inp)) 3544 being_refed++; 3545 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3546 being_refed++; 3547 /* NOTE: 0 refcount also means no timers are referencing us. */ 3548 if ((inp->refcount) || 3549 (being_refed) || 3550 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3551 #ifdef SCTP_LOG_CLOSING 3552 sctp_log_closing(inp, NULL, 4); 3553 #endif 3554 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3555 SCTP_INP_WUNLOCK(inp); 3556 SCTP_ASOC_CREATE_UNLOCK(inp); 3557 SCTP_INP_INFO_WUNLOCK(); 3558 return; 3559 } 3560 inp->sctp_ep.signature_change.type = 0; 3561 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3562 /* 3563 * Remove it from the list .. last thing we need a lock for. 3564 */ 3565 LIST_REMOVE(inp, sctp_list); 3566 SCTP_INP_WUNLOCK(inp); 3567 SCTP_ASOC_CREATE_UNLOCK(inp); 3568 SCTP_INP_INFO_WUNLOCK(); 3569 3570 #ifdef SCTP_LOG_CLOSING 3571 sctp_log_closing(inp, NULL, 5); 3572 #endif 3573 if ((inp->sctp_asocidhash) != NULL) { 3574 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3575 inp->sctp_asocidhash = NULL; 3576 } 3577 /* sa_ignore FREED_MEMORY */ 3578 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3579 /* Its only abandoned if it had data left */ 3580 if (sq->length) 3581 SCTP_STAT_INCR(sctps_left_abandon); 3582 3583 TAILQ_REMOVE(&inp->read_queue, sq, next); 3584 sctp_free_remote_addr(sq->whoFrom); 3585 if (so) 3586 SCTP_SB_DECR(&so->so_rcv, sq->length); 3587 if (sq->data) { 3588 sctp_m_freem(sq->data); 3589 sq->data = NULL; 3590 } 3591 /* 3592 * no need to free the net count, since at this point all 3593 * assoc's are gone. 3594 */ 3595 sctp_free_a_readq(NULL, sq); 3596 } 3597 /* Now the sctp_pcb things */ 3598 /* 3599 * free each asoc if it is not already closed/free. we can't use the 3600 * macro here since le_next will get freed as part of the 3601 * sctp_free_assoc() call. 3602 */ 3603 if (ip_pcb->inp_options) { 3604 (void)sctp_m_free(ip_pcb->inp_options); 3605 ip_pcb->inp_options = 0; 3606 } 3607 #ifdef INET6 3608 if (ip_pcb->inp_vflag & INP_IPV6) { 3609 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3610 } 3611 #endif /* INET6 */ 3612 ip_pcb->inp_vflag = 0; 3613 /* free up authentication fields */ 3614 if (inp->sctp_ep.local_auth_chunks != NULL) 3615 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3616 if (inp->sctp_ep.local_hmacs != NULL) 3617 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3618 3619 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3620 LIST_REMOVE(shared_key, next); 3621 sctp_free_sharedkey(shared_key); 3622 /* sa_ignore FREED_MEMORY */ 3623 } 3624 3625 /* 3626 * if we have an address list the following will free the list of 3627 * ifaddr's that are set into this ep. Again macro limitations here, 3628 * since the LIST_FOREACH could be a bad idea. 3629 */ 3630 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3631 sctp_remove_laddr(laddr); 3632 } 3633 3634 #ifdef SCTP_TRACK_FREED_ASOCS 3635 /* TEMP CODE */ 3636 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_free_list, sctp_tcblist, nstcb) { 3637 LIST_REMOVE(stcb, sctp_tcblist); 3638 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 3639 SCTP_DECR_ASOC_COUNT(); 3640 } 3641 /* *** END TEMP CODE *** */ 3642 #endif 3643 /* Now lets see about freeing the EP hash table. */ 3644 if (inp->sctp_tcbhash != NULL) { 3645 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3646 inp->sctp_tcbhash = NULL; 3647 } 3648 /* Now we must put the ep memory back into the zone pool */ 3649 crfree(inp->ip_inp.inp.inp_cred); 3650 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3651 SCTP_INP_LOCK_DESTROY(inp); 3652 SCTP_INP_READ_LOCK_DESTROY(inp); 3653 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3654 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3655 SCTP_DECR_EP_COUNT(); 3656 } 3657 3658 struct sctp_nets * 3659 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3660 { 3661 struct sctp_nets *net; 3662 3663 /* locate the address */ 3664 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3665 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3666 return (net); 3667 } 3668 return (NULL); 3669 } 3670 3671 int 3672 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3673 { 3674 struct sctp_ifa *sctp_ifa; 3675 3676 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3677 if (sctp_ifa) { 3678 return (1); 3679 } else { 3680 return (0); 3681 } 3682 } 3683 3684 /* 3685 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3686 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3687 * stats of stuff. 3688 */ 3689 int 3690 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3691 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3692 { 3693 /* 3694 * The following is redundant to the same lines in the 3695 * sctp_aloc_assoc() but is needed since others call the add address 3696 * function 3697 */ 3698 struct sctp_nets *net, *netfirst; 3699 int addr_inscope; 3700 3701 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3702 from); 3703 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3704 3705 netfirst = sctp_findnet(stcb, newaddr); 3706 if (netfirst) { 3707 /* 3708 * Lie and return ok, we don't want to make the association 3709 * go away for this behavior. It will happen in the TCP 3710 * model in a connected socket. It does not reach the hash 3711 * table until after the association is built so it can't be 3712 * found. Mark as reachable, since the initial creation will 3713 * have been cleared and the NOT_IN_ASSOC flag will have 3714 * been added... and we don't want to end up removing it 3715 * back out. 3716 */ 3717 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3718 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3719 SCTP_ADDR_UNCONFIRMED); 3720 } else { 3721 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3722 } 3723 3724 return (0); 3725 } 3726 addr_inscope = 1; 3727 switch (newaddr->sa_family) { 3728 #ifdef INET 3729 case AF_INET: 3730 { 3731 struct sockaddr_in *sin; 3732 3733 sin = (struct sockaddr_in *)newaddr; 3734 if (sin->sin_addr.s_addr == 0) { 3735 /* Invalid address */ 3736 return (-1); 3737 } 3738 /* zero out the zero area */ 3739 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3740 3741 /* assure len is set */ 3742 sin->sin_len = sizeof(struct sockaddr_in); 3743 if (set_scope) { 3744 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3745 stcb->asoc.scope.ipv4_local_scope = 1; 3746 } 3747 } else { 3748 /* Validate the address is in scope */ 3749 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3750 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3751 addr_inscope = 0; 3752 } 3753 } 3754 break; 3755 } 3756 #endif 3757 #ifdef INET6 3758 case AF_INET6: 3759 { 3760 struct sockaddr_in6 *sin6; 3761 3762 sin6 = (struct sockaddr_in6 *)newaddr; 3763 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3764 /* Invalid address */ 3765 return (-1); 3766 } 3767 /* assure len is set */ 3768 sin6->sin6_len = sizeof(struct sockaddr_in6); 3769 if (set_scope) { 3770 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3771 stcb->asoc.scope.loopback_scope = 1; 3772 stcb->asoc.scope.local_scope = 0; 3773 stcb->asoc.scope.ipv4_local_scope = 1; 3774 stcb->asoc.scope.site_scope = 1; 3775 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3776 /* 3777 * If the new destination is a 3778 * LINK_LOCAL we must have common 3779 * site scope. Don't set the local 3780 * scope since we may not share all 3781 * links, only loopback can do this. 3782 * Links on the local network would 3783 * also be on our private network 3784 * for v4 too. 3785 */ 3786 stcb->asoc.scope.ipv4_local_scope = 1; 3787 stcb->asoc.scope.site_scope = 1; 3788 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3789 /* 3790 * If the new destination is 3791 * SITE_LOCAL then we must have site 3792 * scope in common. 3793 */ 3794 stcb->asoc.scope.site_scope = 1; 3795 } 3796 } else { 3797 /* Validate the address is in scope */ 3798 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3799 (stcb->asoc.scope.loopback_scope == 0)) { 3800 addr_inscope = 0; 3801 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3802 (stcb->asoc.scope.local_scope == 0)) { 3803 addr_inscope = 0; 3804 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3805 (stcb->asoc.scope.site_scope == 0)) { 3806 addr_inscope = 0; 3807 } 3808 } 3809 break; 3810 } 3811 #endif 3812 default: 3813 /* not supported family type */ 3814 return (-1); 3815 } 3816 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3817 if (net == NULL) { 3818 return (-1); 3819 } 3820 SCTP_INCR_RADDR_COUNT(); 3821 memset(net, 0, sizeof(struct sctp_nets)); 3822 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3823 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3824 switch (newaddr->sa_family) { 3825 #ifdef INET 3826 case AF_INET: 3827 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3828 break; 3829 #endif 3830 #ifdef INET6 3831 case AF_INET6: 3832 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3833 break; 3834 #endif 3835 default: 3836 break; 3837 } 3838 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3839 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3840 stcb->asoc.scope.loopback_scope = 1; 3841 stcb->asoc.scope.ipv4_local_scope = 1; 3842 stcb->asoc.scope.local_scope = 0; 3843 stcb->asoc.scope.site_scope = 1; 3844 addr_inscope = 1; 3845 } 3846 net->failure_threshold = stcb->asoc.def_net_failure; 3847 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3848 if (addr_inscope == 0) { 3849 net->dest_state = (SCTP_ADDR_REACHABLE | 3850 SCTP_ADDR_OUT_OF_SCOPE); 3851 } else { 3852 if (from == SCTP_ADDR_IS_CONFIRMED) 3853 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3854 net->dest_state = SCTP_ADDR_REACHABLE; 3855 else 3856 net->dest_state = SCTP_ADDR_REACHABLE | 3857 SCTP_ADDR_UNCONFIRMED; 3858 } 3859 /* 3860 * We set this to 0, the timer code knows that this means its an 3861 * initial value 3862 */ 3863 net->rto_needed = 1; 3864 net->RTO = 0; 3865 net->RTO_measured = 0; 3866 stcb->asoc.numnets++; 3867 net->ref_count = 1; 3868 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3869 net->port = port; 3870 net->dscp = stcb->asoc.default_dscp; 3871 #ifdef INET6 3872 net->flowlabel = stcb->asoc.default_flowlabel; 3873 #endif 3874 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3875 net->dest_state |= SCTP_ADDR_NOHB; 3876 } else { 3877 net->dest_state &= ~SCTP_ADDR_NOHB; 3878 } 3879 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3880 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3881 } else { 3882 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3883 } 3884 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3885 /* Init the timer structure */ 3886 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3887 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3888 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3889 3890 /* Now generate a route for this guy */ 3891 #ifdef INET6 3892 /* KAME hack: embed scopeid */ 3893 if (newaddr->sa_family == AF_INET6) { 3894 struct sockaddr_in6 *sin6; 3895 3896 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3897 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3898 sin6->sin6_scope_id = 0; 3899 } 3900 #endif 3901 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3902 stcb->asoc.vrf_id, 3903 stcb->sctp_ep->fibnum); 3904 3905 net->src_addr_selected = 0; 3906 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3907 /* Get source address */ 3908 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3909 stcb, 3910 (sctp_route_t *)&net->ro, 3911 net, 3912 0, 3913 stcb->asoc.vrf_id); 3914 if (stcb->asoc.default_mtu > 0) { 3915 net->mtu = stcb->asoc.default_mtu; 3916 switch (net->ro._l_addr.sa.sa_family) { 3917 #ifdef INET 3918 case AF_INET: 3919 net->mtu += SCTP_MIN_V4_OVERHEAD; 3920 break; 3921 #endif 3922 #ifdef INET6 3923 case AF_INET6: 3924 net->mtu += SCTP_MIN_OVERHEAD; 3925 break; 3926 #endif 3927 default: 3928 break; 3929 } 3930 #if defined(INET) || defined(INET6) 3931 if (net->port) { 3932 net->mtu += (uint32_t)sizeof(struct udphdr); 3933 } 3934 #endif 3935 } else if (net->ro._s_addr != NULL) { 3936 uint32_t imtu, rmtu, hcmtu; 3937 3938 net->src_addr_selected = 1; 3939 /* Now get the interface MTU */ 3940 if (net->ro._s_addr->ifn_p != NULL) { 3941 /* 3942 * XXX: Should we here just use 3943 * net->ro._s_addr->ifn_p->ifn_mtu 3944 */ 3945 imtu = SCTP_GATHER_MTU_FROM_IFN_INFO(net->ro._s_addr->ifn_p->ifn_p, 3946 net->ro._s_addr->ifn_p->ifn_index); 3947 } else { 3948 imtu = 0; 3949 } 3950 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 3951 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3952 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3953 } 3954 } 3955 if (net->mtu == 0) { 3956 if (stcb->asoc.default_mtu > 0) { 3957 net->mtu = stcb->asoc.default_mtu; 3958 switch (net->ro._l_addr.sa.sa_family) { 3959 #ifdef INET 3960 case AF_INET: 3961 net->mtu += SCTP_MIN_V4_OVERHEAD; 3962 break; 3963 #endif 3964 #ifdef INET6 3965 case AF_INET6: 3966 net->mtu += SCTP_MIN_OVERHEAD; 3967 break; 3968 #endif 3969 default: 3970 break; 3971 } 3972 #if defined(INET) || defined(INET6) 3973 if (net->port) { 3974 net->mtu += (uint32_t)sizeof(struct udphdr); 3975 } 3976 #endif 3977 } else { 3978 switch (newaddr->sa_family) { 3979 #ifdef INET 3980 case AF_INET: 3981 net->mtu = SCTP_DEFAULT_MTU; 3982 break; 3983 #endif 3984 #ifdef INET6 3985 case AF_INET6: 3986 net->mtu = 1280; 3987 break; 3988 #endif 3989 default: 3990 break; 3991 } 3992 } 3993 } 3994 #if defined(INET) || defined(INET6) 3995 if (net->port) { 3996 net->mtu -= (uint32_t)sizeof(struct udphdr); 3997 } 3998 #endif 3999 if (from == SCTP_ALLOC_ASOC) { 4000 stcb->asoc.smallest_mtu = net->mtu; 4001 } 4002 if (stcb->asoc.smallest_mtu > net->mtu) { 4003 sctp_pathmtu_adjustment(stcb, net->mtu, true); 4004 } 4005 #ifdef INET6 4006 if (newaddr->sa_family == AF_INET6) { 4007 struct sockaddr_in6 *sin6; 4008 4009 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4010 (void)sa6_recoverscope(sin6); 4011 } 4012 #endif 4013 4014 /* JRS - Use the congestion control given in the CC module */ 4015 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4016 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4017 4018 /* 4019 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4020 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4021 */ 4022 net->find_pseudo_cumack = 1; 4023 net->find_rtx_pseudo_cumack = 1; 4024 /* Choose an initial flowid. */ 4025 net->flowid = stcb->asoc.my_vtag ^ 4026 ntohs(stcb->rport) ^ 4027 ntohs(stcb->sctp_ep->sctp_lport); 4028 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4029 if (netp) { 4030 *netp = net; 4031 } 4032 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4033 if (net->ro.ro_nh == NULL) { 4034 /* Since we have no route put it at the back */ 4035 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4036 } else if (netfirst == NULL) { 4037 /* We are the first one in the pool. */ 4038 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4039 } else if (netfirst->ro.ro_nh == NULL) { 4040 /* 4041 * First one has NO route. Place this one ahead of the first 4042 * one. 4043 */ 4044 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4045 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4046 /* 4047 * This one has a different interface than the one at the 4048 * top of the list. Place it ahead. 4049 */ 4050 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4051 } else { 4052 /* 4053 * Ok we have the same interface as the first one. Move 4054 * forward until we find either a) one with a NULL route... 4055 * insert ahead of that b) one with a different ifp.. insert 4056 * after that. c) end of the list.. insert at the tail. 4057 */ 4058 struct sctp_nets *netlook; 4059 4060 do { 4061 netlook = TAILQ_NEXT(netfirst, sctp_next); 4062 if (netlook == NULL) { 4063 /* End of the list */ 4064 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4065 break; 4066 } else if (netlook->ro.ro_nh == NULL) { 4067 /* next one has NO route */ 4068 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4069 break; 4070 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4071 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4072 net, sctp_next); 4073 break; 4074 } 4075 /* Shift forward */ 4076 netfirst = netlook; 4077 } while (netlook != NULL); 4078 } 4079 4080 /* got to have a primary set */ 4081 if (stcb->asoc.primary_destination == 0) { 4082 stcb->asoc.primary_destination = net; 4083 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4084 (net->ro.ro_nh) && 4085 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4086 /* No route to current primary adopt new primary */ 4087 stcb->asoc.primary_destination = net; 4088 } 4089 /* Validate primary is first */ 4090 net = TAILQ_FIRST(&stcb->asoc.nets); 4091 if ((net != stcb->asoc.primary_destination) && 4092 (stcb->asoc.primary_destination)) { 4093 /* 4094 * first one on the list is NOT the primary sctp_cmpaddr() 4095 * is much more efficient if the primary is the first on the 4096 * list, make it so. 4097 */ 4098 TAILQ_REMOVE(&stcb->asoc.nets, 4099 stcb->asoc.primary_destination, sctp_next); 4100 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4101 stcb->asoc.primary_destination, sctp_next); 4102 } 4103 return (0); 4104 } 4105 4106 static uint32_t 4107 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4108 { 4109 uint32_t id; 4110 struct sctpasochead *head; 4111 struct sctp_tcb *lstcb; 4112 4113 try_again: 4114 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4115 /* TSNH */ 4116 return (0); 4117 } 4118 /* 4119 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4120 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4121 */ 4122 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4123 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4124 } 4125 id = inp->sctp_associd_counter; 4126 inp->sctp_associd_counter++; 4127 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4128 if (lstcb) { 4129 goto try_again; 4130 } 4131 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4132 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4133 stcb->asoc.in_asocid_hash = 1; 4134 return (id); 4135 } 4136 4137 /* 4138 * allocate an association and add it to the endpoint. The caller must be 4139 * careful to add all additional addresses once they are know right away or 4140 * else the assoc will be may experience a blackout scenario. 4141 */ 4142 static struct sctp_tcb * 4143 sctp_aloc_assoc_locked(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4144 int *error, uint32_t override_tag, uint32_t initial_tsn, 4145 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4146 struct thread *p, 4147 int initialize_auth_params) 4148 { 4149 /* note the p argument is only valid in unbound sockets */ 4150 4151 struct sctp_tcb *stcb; 4152 struct sctp_association *asoc; 4153 struct sctpasochead *head; 4154 uint16_t rport; 4155 int err; 4156 4157 SCTP_INP_INFO_WLOCK_ASSERT(); 4158 SCTP_INP_WLOCK_ASSERT(inp); 4159 4160 /* 4161 * Assumption made here: Caller has done a 4162 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4163 * address does not exist already. 4164 */ 4165 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4166 /* Hit max assoc, sorry no more */ 4167 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4168 *error = ENOBUFS; 4169 return (NULL); 4170 } 4171 if (firstaddr == NULL) { 4172 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4173 *error = EINVAL; 4174 return (NULL); 4175 } 4176 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4177 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4178 *error = EINVAL; 4179 return (NULL); 4180 } 4181 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4182 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4183 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4184 /* 4185 * If its in the TCP pool, its NOT allowed to create an 4186 * association. The parent listener needs to call 4187 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4188 * off, or connected one does this.. its an error. 4189 */ 4190 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4191 *error = EINVAL; 4192 return (NULL); 4193 } 4194 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4195 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4196 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4197 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4198 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4199 *error = EINVAL; 4200 return (NULL); 4201 } 4202 } 4203 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4204 #ifdef SCTP_DEBUG 4205 if (firstaddr) { 4206 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4207 switch (firstaddr->sa_family) { 4208 #ifdef INET 4209 case AF_INET: 4210 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4211 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4212 break; 4213 #endif 4214 #ifdef INET6 4215 case AF_INET6: 4216 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4217 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4218 break; 4219 #endif 4220 default: 4221 break; 4222 } 4223 } else { 4224 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4225 } 4226 #endif /* SCTP_DEBUG */ 4227 switch (firstaddr->sa_family) { 4228 #ifdef INET 4229 case AF_INET: 4230 { 4231 struct sockaddr_in *sin; 4232 4233 sin = (struct sockaddr_in *)firstaddr; 4234 if ((ntohs(sin->sin_port) == 0) || 4235 (sin->sin_addr.s_addr == INADDR_ANY) || 4236 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4237 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) || 4238 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 4239 (SCTP_IPV6_V6ONLY(inp) != 0))) { 4240 /* Invalid address */ 4241 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4242 *error = EINVAL; 4243 return (NULL); 4244 } 4245 rport = sin->sin_port; 4246 break; 4247 } 4248 #endif 4249 #ifdef INET6 4250 case AF_INET6: 4251 { 4252 struct sockaddr_in6 *sin6; 4253 4254 sin6 = (struct sockaddr_in6 *)firstaddr; 4255 if ((ntohs(sin6->sin6_port) == 0) || 4256 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4257 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) || 4258 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) { 4259 /* Invalid address */ 4260 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4261 *error = EINVAL; 4262 return (NULL); 4263 } 4264 rport = sin6->sin6_port; 4265 break; 4266 } 4267 #endif 4268 default: 4269 /* not supported family type */ 4270 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4271 *error = EINVAL; 4272 return (NULL); 4273 } 4274 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4275 /* 4276 * If you have not performed a bind, then we need to do the 4277 * ephemeral bind for you. 4278 */ 4279 if ((err = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) { 4280 /* bind error, probably perm */ 4281 *error = err; 4282 return (NULL); 4283 } 4284 } 4285 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4286 if (stcb == NULL) { 4287 /* out of memory? */ 4288 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4289 *error = ENOMEM; 4290 return (NULL); 4291 } 4292 SCTP_INCR_ASOC_COUNT(); 4293 4294 memset(stcb, 0, sizeof(*stcb)); 4295 asoc = &stcb->asoc; 4296 4297 SCTP_TCB_LOCK_INIT(stcb); 4298 stcb->rport = rport; 4299 /* setup back pointer's */ 4300 stcb->sctp_ep = inp; 4301 stcb->sctp_socket = inp->sctp_socket; 4302 if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) { 4303 /* failed */ 4304 SCTP_TCB_LOCK_DESTROY(stcb); 4305 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4306 SCTP_DECR_ASOC_COUNT(); 4307 *error = err; 4308 return (NULL); 4309 } 4310 SCTP_TCB_LOCK(stcb); 4311 4312 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4313 /* now that my_vtag is set, add it to the hash */ 4314 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4315 /* put it in the bucket in the vtag hash of assoc's for the system */ 4316 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4317 4318 if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) { 4319 /* failure.. memory error? */ 4320 if (asoc->strmout) { 4321 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4322 asoc->strmout = NULL; 4323 } 4324 if (asoc->mapping_array) { 4325 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4326 asoc->mapping_array = NULL; 4327 } 4328 if (asoc->nr_mapping_array) { 4329 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4330 asoc->nr_mapping_array = NULL; 4331 } 4332 SCTP_DECR_ASOC_COUNT(); 4333 SCTP_TCB_UNLOCK(stcb); 4334 SCTP_TCB_LOCK_DESTROY(stcb); 4335 LIST_REMOVE(stcb, sctp_asocs); 4336 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4337 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4338 SCTP_INP_WUNLOCK(inp); 4339 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4340 *error = ENOBUFS; 4341 return (NULL); 4342 } 4343 /* Init all the timers */ 4344 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4345 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4346 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4347 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4348 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4349 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4350 4351 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4352 /* now file the port under the hash as well */ 4353 if (inp->sctp_tcbhash != NULL) { 4354 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4355 inp->sctp_hashmark)]; 4356 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4357 } 4358 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4359 sctp_initialize_auth_params(inp, stcb); 4360 } 4361 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4362 return (stcb); 4363 } 4364 4365 struct sctp_tcb * 4366 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4367 int *error, uint32_t override_tag, uint32_t initial_tsn, 4368 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4369 struct thread *p, 4370 int initialize_auth_params) 4371 { 4372 struct sctp_tcb *stcb; 4373 4374 SCTP_INP_INFO_WLOCK(); 4375 SCTP_INP_WLOCK(inp); 4376 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4377 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4378 SCTP_INP_INFO_WUNLOCK(); 4379 SCTP_INP_WUNLOCK(inp); 4380 return (stcb); 4381 } 4382 4383 struct sctp_tcb * 4384 sctp_aloc_assoc_connected(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4385 int *error, uint32_t override_tag, uint32_t initial_tsn, 4386 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4387 struct thread *p, 4388 int initialize_auth_params) 4389 { 4390 struct sctp_tcb *stcb; 4391 4392 SCTP_INP_INFO_WLOCK(); 4393 SCTP_INP_WLOCK(inp); 4394 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 4395 SCTP_IS_LISTENING(inp)) { 4396 SCTP_INP_INFO_WUNLOCK(); 4397 SCTP_INP_WUNLOCK(inp); 4398 *error = EINVAL; 4399 return (NULL); 4400 } 4401 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4402 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4403 SCTP_INP_INFO_WUNLOCK(); 4404 if (stcb != NULL && (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4405 inp->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 4406 soisconnecting(inp->sctp_socket); 4407 } 4408 SCTP_INP_WUNLOCK(inp); 4409 return (stcb); 4410 } 4411 4412 void 4413 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4414 { 4415 struct sctp_inpcb *inp; 4416 struct sctp_association *asoc; 4417 4418 inp = stcb->sctp_ep; 4419 asoc = &stcb->asoc; 4420 asoc->numnets--; 4421 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4422 if (net == asoc->primary_destination) { 4423 /* Reset primary */ 4424 struct sctp_nets *lnet; 4425 4426 lnet = TAILQ_FIRST(&asoc->nets); 4427 /* 4428 * Mobility adaptation Ideally, if deleted destination is 4429 * the primary, it becomes a fast retransmission trigger by 4430 * the subsequent SET PRIMARY. (by micchie) 4431 */ 4432 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4433 SCTP_MOBILITY_BASE) || 4434 sctp_is_mobility_feature_on(stcb->sctp_ep, 4435 SCTP_MOBILITY_FASTHANDOFF)) { 4436 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4437 if (asoc->deleted_primary != NULL) { 4438 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4439 goto out; 4440 } 4441 asoc->deleted_primary = net; 4442 atomic_add_int(&net->ref_count, 1); 4443 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4444 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4445 sctp_mobility_feature_on(stcb->sctp_ep, 4446 SCTP_MOBILITY_PRIM_DELETED); 4447 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4448 stcb->sctp_ep, stcb, NULL); 4449 } 4450 out: 4451 /* Try to find a confirmed primary */ 4452 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4453 } 4454 if (net == asoc->last_data_chunk_from) { 4455 /* Reset primary */ 4456 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4457 } 4458 if (net == asoc->last_control_chunk_from) { 4459 /* Clear net */ 4460 asoc->last_control_chunk_from = NULL; 4461 } 4462 if (net == asoc->last_net_cmt_send_started) { 4463 /* Clear net */ 4464 asoc->last_net_cmt_send_started = NULL; 4465 } 4466 if (net == stcb->asoc.alternate) { 4467 sctp_free_remote_addr(stcb->asoc.alternate); 4468 stcb->asoc.alternate = NULL; 4469 } 4470 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4471 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4472 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4473 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4474 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4475 sctp_free_remote_addr(net); 4476 } 4477 4478 /* 4479 * remove a remote endpoint address from an association, it will fail if the 4480 * address does not exist. 4481 */ 4482 int 4483 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4484 { 4485 /* 4486 * Here we need to remove a remote address. This is quite simple, we 4487 * first find it in the list of address for the association 4488 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4489 * on that item. Note we do not allow it to be removed if there are 4490 * no other addresses. 4491 */ 4492 struct sctp_association *asoc; 4493 struct sctp_nets *net, *nnet; 4494 4495 asoc = &stcb->asoc; 4496 4497 /* locate the address */ 4498 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4499 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4500 continue; 4501 } 4502 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4503 remaddr)) { 4504 /* we found the guy */ 4505 if (asoc->numnets < 2) { 4506 /* Must have at LEAST two remote addresses */ 4507 return (-1); 4508 } else { 4509 sctp_remove_net(stcb, net); 4510 return (0); 4511 } 4512 } 4513 } 4514 /* not found. */ 4515 return (-2); 4516 } 4517 4518 static bool 4519 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport, time_t now) 4520 { 4521 struct sctpvtaghead *chain; 4522 struct sctp_tagblock *twait_block; 4523 int i; 4524 4525 SCTP_INP_INFO_LOCK_ASSERT(); 4526 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4527 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4528 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4529 if ((twait_block->vtag_block[i].tv_sec_at_expire >= now) && 4530 (twait_block->vtag_block[i].v_tag == tag) && 4531 (twait_block->vtag_block[i].lport == lport) && 4532 (twait_block->vtag_block[i].rport == rport)) { 4533 return (true); 4534 } 4535 } 4536 } 4537 return (false); 4538 } 4539 4540 static void 4541 sctp_set_vtag_block(struct sctp_timewait *vtag_block, time_t time, 4542 uint32_t tag, uint16_t lport, uint16_t rport) 4543 { 4544 vtag_block->tv_sec_at_expire = time; 4545 vtag_block->v_tag = tag; 4546 vtag_block->lport = lport; 4547 vtag_block->rport = rport; 4548 } 4549 4550 static void 4551 sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4552 { 4553 struct sctpvtaghead *chain; 4554 struct sctp_tagblock *twait_block; 4555 struct timeval now; 4556 time_t time; 4557 int i; 4558 bool set; 4559 4560 SCTP_INP_INFO_WLOCK_ASSERT(); 4561 (void)SCTP_GETTIME_TIMEVAL(&now); 4562 time = now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait); 4563 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4564 set = false; 4565 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4566 /* Block(s) present, lets find space, and expire on the fly */ 4567 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4568 if ((twait_block->vtag_block[i].v_tag == 0) && !set) { 4569 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4570 set = true; 4571 continue; 4572 } 4573 if ((twait_block->vtag_block[i].v_tag != 0) && 4574 (twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4575 if (set) { 4576 /* Audit expires this guy */ 4577 sctp_set_vtag_block(twait_block->vtag_block + i, 0, 0, 0, 0); 4578 } else { 4579 /* Reuse it for the new tag */ 4580 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4581 set = true; 4582 } 4583 } 4584 } 4585 if (set) { 4586 /* 4587 * We only do up to the block where we can place our 4588 * tag for audits 4589 */ 4590 break; 4591 } 4592 } 4593 /* Need to add a new block to chain */ 4594 if (!set) { 4595 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4596 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4597 if (twait_block == NULL) { 4598 return; 4599 } 4600 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4601 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4602 sctp_set_vtag_block(twait_block->vtag_block, time, tag, lport, rport); 4603 } 4604 } 4605 4606 void 4607 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4608 { 4609 struct sctp_tmit_chunk *chk, *nchk; 4610 struct sctp_queued_to_read *control, *ncontrol; 4611 4612 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4613 TAILQ_REMOVE(rh, control, next_instrm); 4614 control->on_strm_q = 0; 4615 if (control->on_read_q == 0) { 4616 sctp_free_remote_addr(control->whoFrom); 4617 if (control->data) { 4618 sctp_m_freem(control->data); 4619 control->data = NULL; 4620 } 4621 } 4622 /* Reassembly free? */ 4623 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4624 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4625 if (chk->data) { 4626 sctp_m_freem(chk->data); 4627 chk->data = NULL; 4628 } 4629 if (chk->holds_key_ref) 4630 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4631 sctp_free_remote_addr(chk->whoTo); 4632 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4633 SCTP_DECR_CHK_COUNT(); 4634 /* sa_ignore FREED_MEMORY */ 4635 } 4636 /* 4637 * We don't free the address here since all the net's were 4638 * freed above. 4639 */ 4640 if (control->on_read_q == 0) { 4641 sctp_free_a_readq(stcb, control); 4642 } 4643 } 4644 } 4645 4646 /*- 4647 * Free the association after un-hashing the remote port. This 4648 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4649 * expect that the input to this function IS a locked TCB. 4650 * It will return 0, if it did NOT destroy the association (instead 4651 * it unlocks it. It will return NON-zero if it either destroyed the 4652 * association OR the association is already destroyed. 4653 */ 4654 int 4655 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4656 { 4657 int i; 4658 struct sctp_association *asoc; 4659 struct sctp_nets *net, *nnet; 4660 struct sctp_laddr *laddr, *naddr; 4661 struct sctp_tmit_chunk *chk, *nchk; 4662 struct sctp_asconf_addr *aparam, *naparam; 4663 struct sctp_asconf_ack *aack, *naack; 4664 struct sctp_stream_reset_list *strrst, *nstrrst; 4665 struct sctp_queued_to_read *sq, *nsq; 4666 struct sctp_stream_queue_pending *sp, *nsp; 4667 sctp_sharedkey_t *shared_key, *nshared_key; 4668 struct socket *so; 4669 4670 /* first, lets purge the entry from the hash table. */ 4671 SCTP_TCB_LOCK_ASSERT(stcb); 4672 4673 #ifdef SCTP_LOG_CLOSING 4674 sctp_log_closing(inp, stcb, 6); 4675 #endif 4676 if (stcb->asoc.state == 0) { 4677 #ifdef SCTP_LOG_CLOSING 4678 sctp_log_closing(inp, NULL, 7); 4679 #endif 4680 /* there is no asoc, really TSNH :-0 */ 4681 return (1); 4682 } 4683 if (stcb->asoc.alternate) { 4684 sctp_free_remote_addr(stcb->asoc.alternate); 4685 stcb->asoc.alternate = NULL; 4686 } 4687 /* TEMP CODE */ 4688 if (stcb->freed_from_where == 0) { 4689 /* Only record the first place free happened from */ 4690 stcb->freed_from_where = from_location; 4691 } 4692 /* TEMP CODE */ 4693 4694 asoc = &stcb->asoc; 4695 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4696 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4697 /* nothing around */ 4698 so = NULL; 4699 else 4700 so = inp->sctp_socket; 4701 4702 /* 4703 * We used timer based freeing if a reader or writer is in the way. 4704 * So we first check if we are actually being called from a timer, 4705 * if so we abort early if a reader or writer is still in the way. 4706 */ 4707 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4708 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4709 /* 4710 * is it the timer driving us? if so are the reader/writers 4711 * gone? 4712 */ 4713 if (stcb->asoc.refcnt) { 4714 /* nope, reader or writer in the way */ 4715 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4716 /* no asoc destroyed */ 4717 SCTP_TCB_UNLOCK(stcb); 4718 #ifdef SCTP_LOG_CLOSING 4719 sctp_log_closing(inp, stcb, 8); 4720 #endif 4721 return (0); 4722 } 4723 } 4724 /* Now clean up any other timers */ 4725 sctp_stop_association_timers(stcb, false); 4726 /* Now the read queue needs to be cleaned up (only once) */ 4727 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4728 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4729 SCTP_INP_READ_LOCK(inp); 4730 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4731 if (sq->stcb == stcb) { 4732 sq->do_not_ref_stcb = 1; 4733 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4734 /* 4735 * If there is no end, there never will be 4736 * now. 4737 */ 4738 if (sq->end_added == 0) { 4739 /* Held for PD-API, clear that. */ 4740 sq->pdapi_aborted = 1; 4741 sq->held_length = 0; 4742 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4743 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4744 stcb, 4745 SCTP_PARTIAL_DELIVERY_ABORTED, 4746 (void *)sq, 4747 SCTP_SO_LOCKED); 4748 } 4749 /* Add an end to wake them */ 4750 sq->end_added = 1; 4751 } 4752 } 4753 } 4754 SCTP_INP_READ_UNLOCK(inp); 4755 if (stcb->block_entry) { 4756 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4757 stcb->block_entry->error = ECONNRESET; 4758 stcb->block_entry = NULL; 4759 } 4760 } 4761 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4762 /* 4763 * Someone holds a reference OR the socket is unaccepted 4764 * yet. 4765 */ 4766 if ((stcb->asoc.refcnt) || 4767 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4768 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4769 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4770 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4771 } 4772 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4773 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4774 /* nothing around */ 4775 so = NULL; 4776 if (so) { 4777 /* Wake any reader/writers */ 4778 sctp_sorwakeup(inp, so); 4779 sctp_sowwakeup(inp, so); 4780 } 4781 SCTP_TCB_UNLOCK(stcb); 4782 4783 #ifdef SCTP_LOG_CLOSING 4784 sctp_log_closing(inp, stcb, 9); 4785 #endif 4786 /* no asoc destroyed */ 4787 return (0); 4788 } 4789 #ifdef SCTP_LOG_CLOSING 4790 sctp_log_closing(inp, stcb, 10); 4791 #endif 4792 /* 4793 * When I reach here, no others want to kill the assoc yet.. and I 4794 * own the lock. Now its possible an abort comes in when I do the 4795 * lock exchange below to grab all the locks to do the final take 4796 * out. to prevent this we increment the count, which will start a 4797 * timer and blow out above thus assuring us that we hold exclusive 4798 * killing of the asoc. Note that after getting back the TCB lock we 4799 * will go ahead and increment the counter back up and stop any 4800 * timer a passing stranger may have started :-S 4801 */ 4802 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4803 atomic_add_int(&stcb->asoc.refcnt, 1); 4804 4805 SCTP_TCB_UNLOCK(stcb); 4806 SCTP_INP_INFO_WLOCK(); 4807 SCTP_INP_WLOCK(inp); 4808 SCTP_TCB_LOCK(stcb); 4809 } 4810 /* Double check the GONE flag */ 4811 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4812 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4813 /* nothing around */ 4814 so = NULL; 4815 4816 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4817 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4818 /* 4819 * For TCP type we need special handling when we are 4820 * connected. We also include the peel'ed off ones to. 4821 */ 4822 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4823 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4824 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4825 if (so) { 4826 SOCKBUF_LOCK(&so->so_rcv); 4827 so->so_state &= ~(SS_ISCONNECTING | 4828 SS_ISDISCONNECTING | 4829 SS_ISCONNECTED); 4830 so->so_state |= SS_ISDISCONNECTED; 4831 socantrcvmore_locked(so); 4832 socantsendmore(so); 4833 sctp_sowwakeup(inp, so); 4834 sctp_sorwakeup(inp, so); 4835 SCTP_SOWAKEUP(so); 4836 } 4837 } 4838 } 4839 4840 /* 4841 * Make it invalid too, that way if its about to run it will abort 4842 * and return. 4843 */ 4844 /* re-increment the lock */ 4845 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4846 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4847 } 4848 if (stcb->asoc.refcnt) { 4849 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4850 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4851 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4852 SCTP_INP_INFO_WUNLOCK(); 4853 SCTP_INP_WUNLOCK(inp); 4854 } 4855 SCTP_TCB_UNLOCK(stcb); 4856 return (0); 4857 } 4858 asoc->state = 0; 4859 if (inp->sctp_tcbhash) { 4860 LIST_REMOVE(stcb, sctp_tcbhash); 4861 } 4862 if (stcb->asoc.in_asocid_hash) { 4863 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4864 } 4865 if (inp->sctp_socket == NULL) { 4866 stcb->sctp_socket = NULL; 4867 } 4868 /* Now lets remove it from the list of ALL associations in the EP */ 4869 LIST_REMOVE(stcb, sctp_tcblist); 4870 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4871 SCTP_INP_INCR_REF(inp); 4872 SCTP_INP_WUNLOCK(inp); 4873 } 4874 /* pull from vtag hash */ 4875 LIST_REMOVE(stcb, sctp_asocs); 4876 sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport); 4877 4878 /* 4879 * Now restop the timers to be sure this is paranoia at is finest! 4880 */ 4881 sctp_stop_association_timers(stcb, true); 4882 4883 /* 4884 * The chunk lists and such SHOULD be empty but we check them just 4885 * in case. 4886 */ 4887 /* anything on the wheel needs to be removed */ 4888 for (i = 0; i < asoc->streamoutcnt; i++) { 4889 struct sctp_stream_out *outs; 4890 4891 outs = &asoc->strmout[i]; 4892 /* now clean up any chunks here */ 4893 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4894 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4895 TAILQ_REMOVE(&outs->outqueue, sp, next); 4896 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp); 4897 sctp_free_spbufspace(stcb, asoc, sp); 4898 if (sp->data) { 4899 if (so) { 4900 /* Still an open socket - report */ 4901 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4902 0, (void *)sp, SCTP_SO_LOCKED); 4903 } 4904 if (sp->data) { 4905 sctp_m_freem(sp->data); 4906 sp->data = NULL; 4907 sp->tail_mbuf = NULL; 4908 sp->length = 0; 4909 } 4910 } 4911 if (sp->net) { 4912 sctp_free_remote_addr(sp->net); 4913 sp->net = NULL; 4914 } 4915 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4916 } 4917 } 4918 /* sa_ignore FREED_MEMORY */ 4919 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4920 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4921 SCTP_FREE(strrst, SCTP_M_STRESET); 4922 } 4923 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4924 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4925 if (sq->data) { 4926 sctp_m_freem(sq->data); 4927 sq->data = NULL; 4928 } 4929 sctp_free_remote_addr(sq->whoFrom); 4930 sq->whoFrom = NULL; 4931 sq->stcb = NULL; 4932 /* Free the ctl entry */ 4933 sctp_free_a_readq(stcb, sq); 4934 /* sa_ignore FREED_MEMORY */ 4935 } 4936 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4937 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4938 if (chk->data) { 4939 sctp_m_freem(chk->data); 4940 chk->data = NULL; 4941 } 4942 if (chk->holds_key_ref) 4943 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4944 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4945 SCTP_DECR_CHK_COUNT(); 4946 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4947 asoc->free_chunk_cnt--; 4948 /* sa_ignore FREED_MEMORY */ 4949 } 4950 /* pending send queue SHOULD be empty */ 4951 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4952 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 4953 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 4954 #ifdef INVARIANTS 4955 } else { 4956 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 4957 #endif 4958 } 4959 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4960 if (chk->data) { 4961 if (so) { 4962 /* Still a socket? */ 4963 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4964 0, chk, SCTP_SO_LOCKED); 4965 } 4966 if (chk->data) { 4967 sctp_m_freem(chk->data); 4968 chk->data = NULL; 4969 } 4970 } 4971 if (chk->holds_key_ref) 4972 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4973 if (chk->whoTo) { 4974 sctp_free_remote_addr(chk->whoTo); 4975 chk->whoTo = NULL; 4976 } 4977 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4978 SCTP_DECR_CHK_COUNT(); 4979 /* sa_ignore FREED_MEMORY */ 4980 } 4981 /* sent queue SHOULD be empty */ 4982 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4983 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 4984 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 4985 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 4986 #ifdef INVARIANTS 4987 } else { 4988 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 4989 #endif 4990 } 4991 } 4992 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4993 if (chk->data) { 4994 if (so) { 4995 /* Still a socket? */ 4996 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 4997 0, chk, SCTP_SO_LOCKED); 4998 } 4999 if (chk->data) { 5000 sctp_m_freem(chk->data); 5001 chk->data = NULL; 5002 } 5003 } 5004 if (chk->holds_key_ref) 5005 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5006 sctp_free_remote_addr(chk->whoTo); 5007 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5008 SCTP_DECR_CHK_COUNT(); 5009 /* sa_ignore FREED_MEMORY */ 5010 } 5011 #ifdef INVARIANTS 5012 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5013 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5014 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5015 } 5016 } 5017 #endif 5018 /* control queue MAY not be empty */ 5019 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5020 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5021 if (chk->data) { 5022 sctp_m_freem(chk->data); 5023 chk->data = NULL; 5024 } 5025 if (chk->holds_key_ref) 5026 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5027 sctp_free_remote_addr(chk->whoTo); 5028 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5029 SCTP_DECR_CHK_COUNT(); 5030 /* sa_ignore FREED_MEMORY */ 5031 } 5032 /* ASCONF queue MAY not be empty */ 5033 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5034 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5035 if (chk->data) { 5036 sctp_m_freem(chk->data); 5037 chk->data = NULL; 5038 } 5039 if (chk->holds_key_ref) 5040 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5041 sctp_free_remote_addr(chk->whoTo); 5042 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5043 SCTP_DECR_CHK_COUNT(); 5044 /* sa_ignore FREED_MEMORY */ 5045 } 5046 if (asoc->mapping_array) { 5047 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5048 asoc->mapping_array = NULL; 5049 } 5050 if (asoc->nr_mapping_array) { 5051 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5052 asoc->nr_mapping_array = NULL; 5053 } 5054 /* the stream outs */ 5055 if (asoc->strmout) { 5056 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5057 asoc->strmout = NULL; 5058 } 5059 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5060 if (asoc->strmin) { 5061 for (i = 0; i < asoc->streamincnt; i++) { 5062 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5063 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5064 } 5065 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5066 asoc->strmin = NULL; 5067 } 5068 asoc->streamincnt = 0; 5069 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5070 #ifdef INVARIANTS 5071 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5072 panic("no net's left alloc'ed, or list points to itself"); 5073 } 5074 #endif 5075 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5076 sctp_free_remote_addr(net); 5077 } 5078 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5079 /* sa_ignore FREED_MEMORY */ 5080 sctp_remove_laddr(laddr); 5081 } 5082 5083 /* pending asconf (address) parameters */ 5084 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5085 /* sa_ignore FREED_MEMORY */ 5086 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5087 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5088 } 5089 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5090 /* sa_ignore FREED_MEMORY */ 5091 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5092 if (aack->data != NULL) { 5093 sctp_m_freem(aack->data); 5094 } 5095 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5096 } 5097 /* clean up auth stuff */ 5098 if (asoc->local_hmacs) 5099 sctp_free_hmaclist(asoc->local_hmacs); 5100 if (asoc->peer_hmacs) 5101 sctp_free_hmaclist(asoc->peer_hmacs); 5102 5103 if (asoc->local_auth_chunks) 5104 sctp_free_chunklist(asoc->local_auth_chunks); 5105 if (asoc->peer_auth_chunks) 5106 sctp_free_chunklist(asoc->peer_auth_chunks); 5107 5108 sctp_free_authinfo(&asoc->authinfo); 5109 5110 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5111 LIST_REMOVE(shared_key, next); 5112 sctp_free_sharedkey(shared_key); 5113 /* sa_ignore FREED_MEMORY */ 5114 } 5115 5116 /* Insert new items here :> */ 5117 5118 /* Get rid of LOCK */ 5119 SCTP_TCB_UNLOCK(stcb); 5120 SCTP_TCB_LOCK_DESTROY(stcb); 5121 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5122 SCTP_INP_INFO_WUNLOCK(); 5123 SCTP_INP_RLOCK(inp); 5124 } 5125 #ifdef SCTP_TRACK_FREED_ASOCS 5126 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5127 /* now clean up the tasoc itself */ 5128 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5129 SCTP_DECR_ASOC_COUNT(); 5130 } else { 5131 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5132 } 5133 #else 5134 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5135 SCTP_DECR_ASOC_COUNT(); 5136 #endif 5137 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5138 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5139 /* 5140 * If its NOT the inp_free calling us AND sctp_close 5141 * as been called, we call back... 5142 */ 5143 SCTP_INP_RUNLOCK(inp); 5144 /* 5145 * This will start the kill timer (if we are the 5146 * last one) since we hold an increment yet. But 5147 * this is the only safe way to do this since 5148 * otherwise if the socket closes at the same time 5149 * we are here we might collide in the cleanup. 5150 */ 5151 sctp_inpcb_free(inp, 5152 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5153 SCTP_CALLED_DIRECTLY_NOCMPSET); 5154 SCTP_INP_DECR_REF(inp); 5155 } else { 5156 /* The socket is still open. */ 5157 SCTP_INP_DECR_REF(inp); 5158 SCTP_INP_RUNLOCK(inp); 5159 } 5160 } 5161 /* destroyed the asoc */ 5162 #ifdef SCTP_LOG_CLOSING 5163 sctp_log_closing(inp, NULL, 11); 5164 #endif 5165 return (1); 5166 } 5167 5168 /* 5169 * determine if a destination is "reachable" based upon the addresses bound 5170 * to the current endpoint (e.g. only v4 or v6 currently bound) 5171 */ 5172 /* 5173 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5174 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5175 * types bound as its endpoint 5176 */ 5177 int 5178 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5179 { 5180 struct sctp_inpcb *inp; 5181 int answer; 5182 5183 /* 5184 * No locks here, the TCB, in all cases is already locked and an 5185 * assoc is up. There is either a INP lock by the caller applied (in 5186 * asconf case when deleting an address) or NOT in the HB case, 5187 * however if HB then the INP increment is up and the INP will not 5188 * be removed (on top of the fact that we have a TCB lock). So we 5189 * only want to read the sctp_flags, which is either bound-all or 5190 * not.. no protection needed since once an assoc is up you can't be 5191 * changing your binding. 5192 */ 5193 inp = stcb->sctp_ep; 5194 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5195 /* if bound all, destination is not restricted */ 5196 /* 5197 * RRS: Question during lock work: Is this correct? If you 5198 * are bound-all you still might need to obey the V4--V6 5199 * flags??? IMO this bound-all stuff needs to be removed! 5200 */ 5201 return (1); 5202 } 5203 /* NOTE: all "scope" checks are done when local addresses are added */ 5204 switch (destaddr->sa_family) { 5205 #ifdef INET6 5206 case AF_INET6: 5207 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5208 break; 5209 #endif 5210 #ifdef INET 5211 case AF_INET: 5212 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5213 break; 5214 #endif 5215 default: 5216 /* invalid family, so it's unreachable */ 5217 answer = 0; 5218 break; 5219 } 5220 return (answer); 5221 } 5222 5223 /* 5224 * update the inp_vflags on an endpoint 5225 */ 5226 static void 5227 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5228 { 5229 struct sctp_laddr *laddr; 5230 5231 /* first clear the flag */ 5232 inp->ip_inp.inp.inp_vflag = 0; 5233 /* set the flag based on addresses on the ep list */ 5234 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5235 if (laddr->ifa == NULL) { 5236 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5237 __func__); 5238 continue; 5239 } 5240 5241 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5242 continue; 5243 } 5244 switch (laddr->ifa->address.sa.sa_family) { 5245 #ifdef INET6 5246 case AF_INET6: 5247 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5248 break; 5249 #endif 5250 #ifdef INET 5251 case AF_INET: 5252 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5253 break; 5254 #endif 5255 default: 5256 break; 5257 } 5258 } 5259 } 5260 5261 /* 5262 * Add the address to the endpoint local address list There is nothing to be 5263 * done if we are bound to all addresses 5264 */ 5265 void 5266 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5267 { 5268 struct sctp_laddr *laddr; 5269 struct sctp_tcb *stcb; 5270 int fnd, error = 0; 5271 5272 fnd = 0; 5273 5274 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5275 /* You are already bound to all. You have it already */ 5276 return; 5277 } 5278 #ifdef INET6 5279 if (ifa->address.sa.sa_family == AF_INET6) { 5280 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5281 /* Can't bind a non-useable addr. */ 5282 return; 5283 } 5284 } 5285 #endif 5286 /* first, is it already present? */ 5287 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5288 if (laddr->ifa == ifa) { 5289 fnd = 1; 5290 break; 5291 } 5292 } 5293 5294 if (fnd == 0) { 5295 /* Not in the ep list */ 5296 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5297 if (error != 0) 5298 return; 5299 inp->laddr_count++; 5300 /* update inp_vflag flags */ 5301 switch (ifa->address.sa.sa_family) { 5302 #ifdef INET6 5303 case AF_INET6: 5304 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5305 break; 5306 #endif 5307 #ifdef INET 5308 case AF_INET: 5309 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5310 break; 5311 #endif 5312 default: 5313 break; 5314 } 5315 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5316 sctp_add_local_addr_restricted(stcb, ifa); 5317 } 5318 } 5319 return; 5320 } 5321 5322 /* 5323 * select a new (hopefully reachable) destination net (should only be used 5324 * when we deleted an ep addr that is the only usable source address to reach 5325 * the destination net) 5326 */ 5327 static void 5328 sctp_select_primary_destination(struct sctp_tcb *stcb) 5329 { 5330 struct sctp_nets *net; 5331 5332 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5333 /* for now, we'll just pick the first reachable one we find */ 5334 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5335 continue; 5336 if (sctp_destination_is_reachable(stcb, 5337 (struct sockaddr *)&net->ro._l_addr)) { 5338 /* found a reachable destination */ 5339 stcb->asoc.primary_destination = net; 5340 } 5341 } 5342 /* I can't there from here! ...we're gonna die shortly... */ 5343 } 5344 5345 /* 5346 * Delete the address from the endpoint local address list. There is nothing 5347 * to be done if we are bound to all addresses 5348 */ 5349 void 5350 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5351 { 5352 struct sctp_laddr *laddr; 5353 int fnd; 5354 5355 fnd = 0; 5356 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5357 /* You are already bound to all. You have it already */ 5358 return; 5359 } 5360 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5361 if (laddr->ifa == ifa) { 5362 fnd = 1; 5363 break; 5364 } 5365 } 5366 if (fnd && (inp->laddr_count < 2)) { 5367 /* can't delete unless there are at LEAST 2 addresses */ 5368 return; 5369 } 5370 if (fnd) { 5371 /* 5372 * clean up any use of this address go through our 5373 * associations and clear any last_used_address that match 5374 * this one for each assoc, see if a new primary_destination 5375 * is needed 5376 */ 5377 struct sctp_tcb *stcb; 5378 5379 /* clean up "next_addr_touse" */ 5380 if (inp->next_addr_touse == laddr) 5381 /* delete this address */ 5382 inp->next_addr_touse = NULL; 5383 5384 /* clean up "last_used_address" */ 5385 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5386 struct sctp_nets *net; 5387 5388 SCTP_TCB_LOCK(stcb); 5389 if (stcb->asoc.last_used_address == laddr) 5390 /* delete this address */ 5391 stcb->asoc.last_used_address = NULL; 5392 /* 5393 * Now spin through all the nets and purge any ref 5394 * to laddr 5395 */ 5396 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5397 if (net->ro._s_addr == laddr->ifa) { 5398 /* Yep, purge src address selected */ 5399 RO_NHFREE(&net->ro); 5400 sctp_free_ifa(net->ro._s_addr); 5401 net->ro._s_addr = NULL; 5402 net->src_addr_selected = 0; 5403 } 5404 } 5405 SCTP_TCB_UNLOCK(stcb); 5406 } /* for each tcb */ 5407 /* remove it from the ep list */ 5408 sctp_remove_laddr(laddr); 5409 inp->laddr_count--; 5410 /* update inp_vflag flags */ 5411 sctp_update_ep_vflag(inp); 5412 } 5413 return; 5414 } 5415 5416 /* 5417 * Add the address to the TCB local address restricted list. 5418 * This is a "pending" address list (eg. addresses waiting for an 5419 * ASCONF-ACK response) and cannot be used as a valid source address. 5420 */ 5421 void 5422 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5423 { 5424 struct sctp_laddr *laddr; 5425 struct sctpladdr *list; 5426 5427 /* 5428 * Assumes TCB is locked.. and possibly the INP. May need to 5429 * confirm/fix that if we need it and is not the case. 5430 */ 5431 list = &stcb->asoc.sctp_restricted_addrs; 5432 5433 #ifdef INET6 5434 if (ifa->address.sa.sa_family == AF_INET6) { 5435 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5436 /* Can't bind a non-existent addr. */ 5437 return; 5438 } 5439 } 5440 #endif 5441 /* does the address already exist? */ 5442 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5443 if (laddr->ifa == ifa) { 5444 return; 5445 } 5446 } 5447 5448 /* add to the list */ 5449 (void)sctp_insert_laddr(list, ifa, 0); 5450 return; 5451 } 5452 5453 /* 5454 * Remove a local address from the TCB local address restricted list 5455 */ 5456 void 5457 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5458 { 5459 struct sctp_inpcb *inp; 5460 struct sctp_laddr *laddr; 5461 5462 /* 5463 * This is called by asconf work. It is assumed that a) The TCB is 5464 * locked and b) The INP is locked. This is true in as much as I can 5465 * trace through the entry asconf code where I did these locks. 5466 * Again, the ASCONF code is a bit different in that it does lock 5467 * the INP during its work often times. This must be since we don't 5468 * want other proc's looking up things while what they are looking 5469 * up is changing :-D 5470 */ 5471 5472 inp = stcb->sctp_ep; 5473 /* if subset bound and don't allow ASCONF's, can't delete last */ 5474 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5475 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5476 if (stcb->sctp_ep->laddr_count < 2) { 5477 /* can't delete last address */ 5478 return; 5479 } 5480 } 5481 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5482 /* remove the address if it exists */ 5483 if (laddr->ifa == NULL) 5484 continue; 5485 if (laddr->ifa == ifa) { 5486 sctp_remove_laddr(laddr); 5487 return; 5488 } 5489 } 5490 5491 /* address not found! */ 5492 return; 5493 } 5494 5495 /* sysctl */ 5496 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5497 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5498 5499 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5500 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5501 int *sctp_cpuarry = NULL; 5502 5503 void 5504 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5505 { 5506 /* Queue a packet to a processor for the specified core */ 5507 struct sctp_mcore_queue *qent; 5508 struct sctp_mcore_ctrl *wkq; 5509 int need_wake = 0; 5510 5511 if (sctp_mcore_workers == NULL) { 5512 /* Something went way bad during setup */ 5513 sctp_input_with_port(m, off, 0); 5514 return; 5515 } 5516 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5517 (sizeof(struct sctp_mcore_queue)), 5518 SCTP_M_MCORE); 5519 if (qent == NULL) { 5520 /* This is trouble */ 5521 sctp_input_with_port(m, off, 0); 5522 return; 5523 } 5524 qent->vn = curvnet; 5525 qent->m = m; 5526 qent->off = off; 5527 qent->v6 = 0; 5528 wkq = &sctp_mcore_workers[cpu_to_use]; 5529 SCTP_MCORE_QLOCK(wkq); 5530 5531 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5532 if (wkq->running == 0) { 5533 need_wake = 1; 5534 } 5535 SCTP_MCORE_QUNLOCK(wkq); 5536 if (need_wake) { 5537 wakeup(&wkq->running); 5538 } 5539 } 5540 5541 static void 5542 sctp_mcore_thread(void *arg) 5543 { 5544 5545 struct sctp_mcore_ctrl *wkq; 5546 struct sctp_mcore_queue *qent; 5547 5548 wkq = (struct sctp_mcore_ctrl *)arg; 5549 struct mbuf *m; 5550 int off, v6; 5551 5552 /* Wait for first tickle */ 5553 SCTP_MCORE_LOCK(wkq); 5554 wkq->running = 0; 5555 msleep(&wkq->running, 5556 &wkq->core_mtx, 5557 0, "wait for pkt", 0); 5558 SCTP_MCORE_UNLOCK(wkq); 5559 5560 /* Bind to our cpu */ 5561 thread_lock(curthread); 5562 sched_bind(curthread, wkq->cpuid); 5563 thread_unlock(curthread); 5564 5565 /* Now lets start working */ 5566 SCTP_MCORE_LOCK(wkq); 5567 /* Now grab lock and go */ 5568 for (;;) { 5569 SCTP_MCORE_QLOCK(wkq); 5570 skip_sleep: 5571 wkq->running = 1; 5572 qent = TAILQ_FIRST(&wkq->que); 5573 if (qent) { 5574 TAILQ_REMOVE(&wkq->que, qent, next); 5575 SCTP_MCORE_QUNLOCK(wkq); 5576 CURVNET_SET(qent->vn); 5577 m = qent->m; 5578 off = qent->off; 5579 v6 = qent->v6; 5580 SCTP_FREE(qent, SCTP_M_MCORE); 5581 if (v6 == 0) { 5582 sctp_input_with_port(m, off, 0); 5583 } else { 5584 SCTP_PRINTF("V6 not yet supported\n"); 5585 sctp_m_freem(m); 5586 } 5587 CURVNET_RESTORE(); 5588 SCTP_MCORE_QLOCK(wkq); 5589 } 5590 wkq->running = 0; 5591 if (!TAILQ_EMPTY(&wkq->que)) { 5592 goto skip_sleep; 5593 } 5594 SCTP_MCORE_QUNLOCK(wkq); 5595 msleep(&wkq->running, 5596 &wkq->core_mtx, 5597 0, "wait for pkt", 0); 5598 } 5599 } 5600 5601 static void 5602 sctp_startup_mcore_threads(void) 5603 { 5604 int i, cpu; 5605 5606 if (mp_ncpus == 1) 5607 return; 5608 5609 if (sctp_mcore_workers != NULL) { 5610 /* 5611 * Already been here in some previous vnet? 5612 */ 5613 return; 5614 } 5615 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5616 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5617 SCTP_M_MCORE); 5618 if (sctp_mcore_workers == NULL) { 5619 /* TSNH I hope */ 5620 return; 5621 } 5622 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5623 sizeof(struct sctp_mcore_ctrl))); 5624 /* Init the structures */ 5625 for (i = 0; i <= mp_maxid; i++) { 5626 TAILQ_INIT(&sctp_mcore_workers[i].que); 5627 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5628 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5629 sctp_mcore_workers[i].cpuid = i; 5630 } 5631 if (sctp_cpuarry == NULL) { 5632 SCTP_MALLOC(sctp_cpuarry, int *, 5633 (mp_ncpus * sizeof(int)), 5634 SCTP_M_MCORE); 5635 i = 0; 5636 CPU_FOREACH(cpu) { 5637 sctp_cpuarry[i] = cpu; 5638 i++; 5639 } 5640 } 5641 /* Now start them all */ 5642 CPU_FOREACH(cpu) { 5643 (void)kproc_create(sctp_mcore_thread, 5644 (void *)&sctp_mcore_workers[cpu], 5645 &sctp_mcore_workers[cpu].thread_proc, 5646 0, 5647 SCTP_KTHREAD_PAGES, 5648 SCTP_MCORE_NAME); 5649 } 5650 } 5651 #endif 5652 5653 #define VALIDATE_LOADER_TUNABLE(var_name, prefix) \ 5654 if (SCTP_BASE_SYSCTL(var_name) < prefix##_MIN || \ 5655 SCTP_BASE_SYSCTL(var_name) > prefix##_MAX) \ 5656 SCTP_BASE_SYSCTL(var_name) = prefix##_DEFAULT 5657 5658 void 5659 sctp_pcb_init(void) 5660 { 5661 /* 5662 * SCTP initialization for the PCB structures should be called by 5663 * the sctp_init() function. 5664 */ 5665 int i; 5666 struct timeval tv; 5667 5668 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5669 /* error I was called twice */ 5670 return; 5671 } 5672 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5673 5674 #if defined(SCTP_LOCAL_TRACE_BUF) 5675 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5676 #endif 5677 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5678 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5679 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5680 SCTP_M_MCORE); 5681 #endif 5682 (void)SCTP_GETTIME_TIMEVAL(&tv); 5683 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5684 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5685 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5686 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5687 #else 5688 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5689 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5690 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5691 #endif 5692 /* init the empty list of (All) Endpoints */ 5693 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5694 5695 /* init the hash table of endpoints */ 5696 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5697 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5698 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5699 VALIDATE_LOADER_TUNABLE(sctp_hashtblsize, SCTPCTL_TCBHASHSIZE); 5700 VALIDATE_LOADER_TUNABLE(sctp_pcbtblsize, SCTPCTL_PCBHASHSIZE); 5701 VALIDATE_LOADER_TUNABLE(sctp_chunkscale, SCTPCTL_CHUNKSCALE); 5702 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5703 &SCTP_BASE_INFO(hashasocmark)); 5704 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5705 &SCTP_BASE_INFO(hashmark)); 5706 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5707 &SCTP_BASE_INFO(hashtcpmark)); 5708 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5709 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5710 &SCTP_BASE_INFO(hashvrfmark)); 5711 5712 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5713 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5714 /* init the zones */ 5715 /* 5716 * FIX ME: Should check for NULL returns, but if it does fail we are 5717 * doomed to panic anyways... add later maybe. 5718 */ 5719 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5720 sizeof(struct sctp_inpcb), maxsockets); 5721 5722 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5723 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5724 5725 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5726 sizeof(struct sctp_laddr), 5727 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5728 5729 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5730 sizeof(struct sctp_nets), 5731 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5732 5733 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5734 sizeof(struct sctp_tmit_chunk), 5735 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5736 5737 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5738 sizeof(struct sctp_queued_to_read), 5739 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5740 5741 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5742 sizeof(struct sctp_stream_queue_pending), 5743 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5744 5745 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5746 sizeof(struct sctp_asconf), 5747 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5748 5749 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5750 sizeof(struct sctp_asconf_ack), 5751 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5752 5753 /* Master Lock INIT for info structure */ 5754 SCTP_INP_INFO_LOCK_INIT(); 5755 SCTP_STATLOG_INIT_LOCK(); 5756 5757 SCTP_IPI_COUNT_INIT(); 5758 SCTP_IPI_ADDR_INIT(); 5759 #ifdef SCTP_PACKET_LOGGING 5760 SCTP_IP_PKTLOG_INIT(); 5761 #endif 5762 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5763 5764 SCTP_WQ_ADDR_INIT(); 5765 /* not sure if we need all the counts */ 5766 SCTP_BASE_INFO(ipi_count_ep) = 0; 5767 /* assoc/tcb zone info */ 5768 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5769 /* local addrlist zone info */ 5770 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5771 /* remote addrlist zone info */ 5772 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5773 /* chunk info */ 5774 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5775 5776 /* socket queue zone info */ 5777 SCTP_BASE_INFO(ipi_count_readq) = 0; 5778 5779 /* stream out queue cont */ 5780 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5781 5782 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5783 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5784 5785 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5786 5787 /* Init the TIMEWAIT list */ 5788 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5789 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5790 } 5791 sctp_startup_iterator(); 5792 5793 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5794 sctp_startup_mcore_threads(); 5795 #endif 5796 5797 /* 5798 * INIT the default VRF which for BSD is the only one, other O/S's 5799 * may have more. But initially they must start with one and then 5800 * add the VRF's as addresses are added. 5801 */ 5802 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5803 } 5804 5805 /* 5806 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5807 */ 5808 void 5809 sctp_pcb_finish(void) 5810 { 5811 struct sctp_vrflist *vrf_bucket; 5812 struct sctp_vrf *vrf, *nvrf; 5813 struct sctp_ifn *ifn, *nifn; 5814 struct sctp_ifa *ifa, *nifa; 5815 struct sctpvtaghead *chain; 5816 struct sctp_tagblock *twait_block, *prev_twait_block; 5817 struct sctp_laddr *wi, *nwi; 5818 int i; 5819 struct sctp_iterator *it, *nit; 5820 5821 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5822 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5823 return; 5824 } 5825 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5826 /* 5827 * In FreeBSD the iterator thread never exits but we do clean up. 5828 * The only way FreeBSD reaches here is if we have VRF's but we 5829 * still add the ifdef to make it compile on old versions. 5830 */ 5831 retry: 5832 SCTP_IPI_ITERATOR_WQ_LOCK(); 5833 /* 5834 * sctp_iterator_worker() might be working on an it entry without 5835 * holding the lock. We won't find it on the list either and 5836 * continue and free/destroy it. While holding the lock, spin, to 5837 * avoid the race condition as sctp_iterator_worker() will have to 5838 * wait to re-acquire the lock. 5839 */ 5840 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5841 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5842 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5843 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5844 DELAY(10); 5845 goto retry; 5846 } 5847 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5848 if (it->vn != curvnet) { 5849 continue; 5850 } 5851 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5852 if (it->function_atend != NULL) { 5853 (*it->function_atend) (it->pointer, it->val); 5854 } 5855 SCTP_FREE(it, SCTP_M_ITER); 5856 } 5857 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5858 SCTP_ITERATOR_LOCK(); 5859 if ((sctp_it_ctl.cur_it) && 5860 (sctp_it_ctl.cur_it->vn == curvnet)) { 5861 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5862 } 5863 SCTP_ITERATOR_UNLOCK(); 5864 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5865 SCTP_WQ_ADDR_LOCK(); 5866 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5867 LIST_REMOVE(wi, sctp_nxt_addr); 5868 SCTP_DECR_LADDR_COUNT(); 5869 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5870 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5871 } 5872 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5873 } 5874 SCTP_WQ_ADDR_UNLOCK(); 5875 5876 /* 5877 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5878 * destroyed first). 5879 */ 5880 SCTP_IPI_ADDR_WLOCK(); 5881 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5882 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5883 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5884 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5885 /* free the ifa */ 5886 LIST_REMOVE(ifa, next_bucket); 5887 LIST_REMOVE(ifa, next_ifa); 5888 SCTP_FREE(ifa, SCTP_M_IFA); 5889 } 5890 /* free the ifn */ 5891 LIST_REMOVE(ifn, next_bucket); 5892 LIST_REMOVE(ifn, next_ifn); 5893 SCTP_FREE(ifn, SCTP_M_IFN); 5894 } 5895 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5896 /* free the vrf */ 5897 LIST_REMOVE(vrf, next_vrf); 5898 SCTP_FREE(vrf, SCTP_M_VRF); 5899 } 5900 SCTP_IPI_ADDR_WUNLOCK(); 5901 /* free the vrf hashes */ 5902 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5903 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5904 5905 /* 5906 * free the TIMEWAIT list elements malloc'd in the function 5907 * sctp_add_vtag_to_timewait()... 5908 */ 5909 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5910 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5911 if (!LIST_EMPTY(chain)) { 5912 prev_twait_block = NULL; 5913 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5914 if (prev_twait_block) { 5915 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5916 } 5917 prev_twait_block = twait_block; 5918 } 5919 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5920 } 5921 } 5922 5923 /* free the locks and mutexes */ 5924 #ifdef SCTP_PACKET_LOGGING 5925 SCTP_IP_PKTLOG_DESTROY(); 5926 #endif 5927 SCTP_IPI_ADDR_DESTROY(); 5928 SCTP_STATLOG_DESTROY(); 5929 SCTP_INP_INFO_LOCK_DESTROY(); 5930 5931 SCTP_WQ_ADDR_DESTROY(); 5932 5933 /* Get rid of other stuff too. */ 5934 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5935 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5936 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5937 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5938 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5939 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5940 5941 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5942 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5943 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5944 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5945 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5946 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5947 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5948 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5949 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5950 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5951 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5952 #endif 5953 } 5954 5955 int 5956 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5957 int offset, int limit, 5958 struct sockaddr *src, struct sockaddr *dst, 5959 struct sockaddr *altsa, uint16_t port) 5960 { 5961 /* 5962 * grub through the INIT pulling addresses and loading them to the 5963 * nets structure in the asoc. The from address in the mbuf should 5964 * also be loaded (if it is not already). This routine can be called 5965 * with either INIT or INIT-ACK's as long as the m points to the IP 5966 * packet and the offset points to the beginning of the parameters. 5967 */ 5968 struct sctp_inpcb *inp; 5969 struct sctp_nets *net, *nnet, *net_tmp; 5970 struct sctp_paramhdr *phdr, param_buf; 5971 struct sctp_tcb *stcb_tmp; 5972 uint16_t ptype, plen; 5973 struct sockaddr *sa; 5974 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5975 struct sctp_auth_random *p_random = NULL; 5976 uint16_t random_len = 0; 5977 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5978 struct sctp_auth_hmac_algo *hmacs = NULL; 5979 uint16_t hmacs_len = 0; 5980 uint8_t saw_asconf = 0; 5981 uint8_t saw_asconf_ack = 0; 5982 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5983 struct sctp_auth_chunk_list *chunks = NULL; 5984 uint16_t num_chunks = 0; 5985 sctp_key_t *new_key; 5986 uint32_t keylen; 5987 int got_random = 0, got_hmacs = 0, got_chklist = 0; 5988 uint8_t peer_supports_ecn; 5989 uint8_t peer_supports_prsctp; 5990 uint8_t peer_supports_auth; 5991 uint8_t peer_supports_asconf; 5992 uint8_t peer_supports_asconf_ack; 5993 uint8_t peer_supports_reconfig; 5994 uint8_t peer_supports_nrsack; 5995 uint8_t peer_supports_pktdrop; 5996 uint8_t peer_supports_idata; 5997 #ifdef INET 5998 struct sockaddr_in sin; 5999 #endif 6000 #ifdef INET6 6001 struct sockaddr_in6 sin6; 6002 #endif 6003 6004 /* First get the destination address setup too. */ 6005 #ifdef INET 6006 memset(&sin, 0, sizeof(sin)); 6007 sin.sin_family = AF_INET; 6008 sin.sin_len = sizeof(sin); 6009 sin.sin_port = stcb->rport; 6010 #endif 6011 #ifdef INET6 6012 memset(&sin6, 0, sizeof(sin6)); 6013 sin6.sin6_family = AF_INET6; 6014 sin6.sin6_len = sizeof(struct sockaddr_in6); 6015 sin6.sin6_port = stcb->rport; 6016 #endif 6017 if (altsa) { 6018 sa = altsa; 6019 } else { 6020 sa = src; 6021 } 6022 peer_supports_idata = 0; 6023 peer_supports_ecn = 0; 6024 peer_supports_prsctp = 0; 6025 peer_supports_auth = 0; 6026 peer_supports_asconf = 0; 6027 peer_supports_asconf_ack = 0; 6028 peer_supports_reconfig = 0; 6029 peer_supports_nrsack = 0; 6030 peer_supports_pktdrop = 0; 6031 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6032 /* mark all addresses that we have currently on the list */ 6033 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6034 } 6035 /* does the source address already exist? if so skip it */ 6036 inp = stcb->sctp_ep; 6037 atomic_add_int(&stcb->asoc.refcnt, 1); 6038 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6039 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6040 6041 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6042 /* we must add the source address */ 6043 /* no scope set here since we have a tcb already. */ 6044 switch (sa->sa_family) { 6045 #ifdef INET 6046 case AF_INET: 6047 if (stcb->asoc.scope.ipv4_addr_legal) { 6048 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6049 return (-1); 6050 } 6051 } 6052 break; 6053 #endif 6054 #ifdef INET6 6055 case AF_INET6: 6056 if (stcb->asoc.scope.ipv6_addr_legal) { 6057 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6058 return (-2); 6059 } 6060 } 6061 break; 6062 #endif 6063 default: 6064 break; 6065 } 6066 } else { 6067 if (net_tmp != NULL && stcb_tmp == stcb) { 6068 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6069 } else if (stcb_tmp != stcb) { 6070 /* It belongs to another association? */ 6071 if (stcb_tmp) 6072 SCTP_TCB_UNLOCK(stcb_tmp); 6073 return (-3); 6074 } 6075 } 6076 if (stcb->asoc.state == 0) { 6077 /* the assoc was freed? */ 6078 return (-4); 6079 } 6080 /* now we must go through each of the params. */ 6081 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6082 while (phdr) { 6083 ptype = ntohs(phdr->param_type); 6084 plen = ntohs(phdr->param_length); 6085 /* 6086 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6087 * (uint32_t)ptype, (int)plen); 6088 */ 6089 if (offset + plen > limit) { 6090 break; 6091 } 6092 if (plen < sizeof(struct sctp_paramhdr)) { 6093 break; 6094 } 6095 #ifdef INET 6096 if (ptype == SCTP_IPV4_ADDRESS) { 6097 if (stcb->asoc.scope.ipv4_addr_legal) { 6098 struct sctp_ipv4addr_param *p4, p4_buf; 6099 6100 /* ok get the v4 address and check/add */ 6101 phdr = sctp_get_next_param(m, offset, 6102 (struct sctp_paramhdr *)&p4_buf, 6103 sizeof(p4_buf)); 6104 if (plen != sizeof(struct sctp_ipv4addr_param) || 6105 phdr == NULL) { 6106 return (-5); 6107 } 6108 p4 = (struct sctp_ipv4addr_param *)phdr; 6109 sin.sin_addr.s_addr = p4->addr; 6110 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6111 /* Skip multi-cast addresses */ 6112 goto next_param; 6113 } 6114 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6115 (sin.sin_addr.s_addr == INADDR_ANY)) { 6116 goto next_param; 6117 } 6118 sa = (struct sockaddr *)&sin; 6119 inp = stcb->sctp_ep; 6120 atomic_add_int(&stcb->asoc.refcnt, 1); 6121 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6122 dst, stcb); 6123 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6124 6125 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6126 inp == NULL) { 6127 /* we must add the source address */ 6128 /* 6129 * no scope set since we have a tcb 6130 * already 6131 */ 6132 6133 /* 6134 * we must validate the state again 6135 * here 6136 */ 6137 add_it_now: 6138 if (stcb->asoc.state == 0) { 6139 /* the assoc was freed? */ 6140 return (-7); 6141 } 6142 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6143 return (-8); 6144 } 6145 } else if (stcb_tmp == stcb) { 6146 if (stcb->asoc.state == 0) { 6147 /* the assoc was freed? */ 6148 return (-10); 6149 } 6150 if (net != NULL) { 6151 /* clear flag */ 6152 net->dest_state &= 6153 ~SCTP_ADDR_NOT_IN_ASSOC; 6154 } 6155 } else { 6156 /* 6157 * strange, address is in another 6158 * assoc? straighten out locks. 6159 */ 6160 if (stcb_tmp) { 6161 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6162 struct mbuf *op_err; 6163 char msg[SCTP_DIAG_INFO_LEN]; 6164 6165 /* 6166 * in setup state we 6167 * abort this guy 6168 */ 6169 SCTP_SNPRINTF(msg, sizeof(msg), 6170 "%s:%d at %s", __FILE__, __LINE__, __func__); 6171 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6172 msg); 6173 sctp_abort_an_association(stcb_tmp->sctp_ep, 6174 stcb_tmp, op_err, false, 6175 SCTP_SO_NOT_LOCKED); 6176 goto add_it_now; 6177 } 6178 SCTP_TCB_UNLOCK(stcb_tmp); 6179 } 6180 6181 if (stcb->asoc.state == 0) { 6182 /* the assoc was freed? */ 6183 return (-12); 6184 } 6185 return (-13); 6186 } 6187 } 6188 } else 6189 #endif 6190 #ifdef INET6 6191 if (ptype == SCTP_IPV6_ADDRESS) { 6192 if (stcb->asoc.scope.ipv6_addr_legal) { 6193 /* ok get the v6 address and check/add */ 6194 struct sctp_ipv6addr_param *p6, p6_buf; 6195 6196 phdr = sctp_get_next_param(m, offset, 6197 (struct sctp_paramhdr *)&p6_buf, 6198 sizeof(p6_buf)); 6199 if (plen != sizeof(struct sctp_ipv6addr_param) || 6200 phdr == NULL) { 6201 return (-14); 6202 } 6203 p6 = (struct sctp_ipv6addr_param *)phdr; 6204 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6205 sizeof(p6->addr)); 6206 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6207 /* Skip multi-cast addresses */ 6208 goto next_param; 6209 } 6210 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6211 /* 6212 * Link local make no sense without 6213 * scope 6214 */ 6215 goto next_param; 6216 } 6217 sa = (struct sockaddr *)&sin6; 6218 inp = stcb->sctp_ep; 6219 atomic_add_int(&stcb->asoc.refcnt, 1); 6220 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6221 dst, stcb); 6222 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6223 if (stcb_tmp == NULL && 6224 (inp == stcb->sctp_ep || inp == NULL)) { 6225 /* 6226 * we must validate the state again 6227 * here 6228 */ 6229 add_it_now6: 6230 if (stcb->asoc.state == 0) { 6231 /* the assoc was freed? */ 6232 return (-16); 6233 } 6234 /* 6235 * we must add the address, no scope 6236 * set 6237 */ 6238 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6239 return (-17); 6240 } 6241 } else if (stcb_tmp == stcb) { 6242 /* 6243 * we must validate the state again 6244 * here 6245 */ 6246 if (stcb->asoc.state == 0) { 6247 /* the assoc was freed? */ 6248 return (-19); 6249 } 6250 if (net != NULL) { 6251 /* clear flag */ 6252 net->dest_state &= 6253 ~SCTP_ADDR_NOT_IN_ASSOC; 6254 } 6255 } else { 6256 /* 6257 * strange, address is in another 6258 * assoc? straighten out locks. 6259 */ 6260 if (stcb_tmp) { 6261 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6262 struct mbuf *op_err; 6263 char msg[SCTP_DIAG_INFO_LEN]; 6264 6265 /* 6266 * in setup state we 6267 * abort this guy 6268 */ 6269 SCTP_SNPRINTF(msg, sizeof(msg), 6270 "%s:%d at %s", __FILE__, __LINE__, __func__); 6271 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6272 msg); 6273 sctp_abort_an_association(stcb_tmp->sctp_ep, 6274 stcb_tmp, op_err, false, 6275 SCTP_SO_NOT_LOCKED); 6276 goto add_it_now6; 6277 } 6278 SCTP_TCB_UNLOCK(stcb_tmp); 6279 } 6280 if (stcb->asoc.state == 0) { 6281 /* the assoc was freed? */ 6282 return (-21); 6283 } 6284 return (-22); 6285 } 6286 } 6287 } else 6288 #endif 6289 if (ptype == SCTP_ECN_CAPABLE) { 6290 peer_supports_ecn = 1; 6291 } else if (ptype == SCTP_ULP_ADAPTATION) { 6292 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6293 struct sctp_adaptation_layer_indication ai, 6294 *aip; 6295 6296 phdr = sctp_get_next_param(m, offset, 6297 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6298 aip = (struct sctp_adaptation_layer_indication *)phdr; 6299 if (aip) { 6300 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6301 stcb->asoc.adaptation_needed = 1; 6302 } 6303 } 6304 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6305 struct sctp_asconf_addr_param lstore, *fee; 6306 int lptype; 6307 struct sockaddr *lsa = NULL; 6308 #ifdef INET 6309 struct sctp_asconf_addrv4_param *fii; 6310 #endif 6311 6312 if (stcb->asoc.asconf_supported == 0) { 6313 return (-100); 6314 } 6315 if (plen > sizeof(lstore)) { 6316 return (-23); 6317 } 6318 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6319 return (-101); 6320 } 6321 phdr = sctp_get_next_param(m, offset, 6322 (struct sctp_paramhdr *)&lstore, 6323 plen); 6324 if (phdr == NULL) { 6325 return (-24); 6326 } 6327 fee = (struct sctp_asconf_addr_param *)phdr; 6328 lptype = ntohs(fee->addrp.ph.param_type); 6329 switch (lptype) { 6330 #ifdef INET 6331 case SCTP_IPV4_ADDRESS: 6332 if (plen != 6333 sizeof(struct sctp_asconf_addrv4_param)) { 6334 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6335 (int)sizeof(struct sctp_asconf_addrv4_param), 6336 plen); 6337 } else { 6338 fii = (struct sctp_asconf_addrv4_param *)fee; 6339 sin.sin_addr.s_addr = fii->addrp.addr; 6340 lsa = (struct sockaddr *)&sin; 6341 } 6342 break; 6343 #endif 6344 #ifdef INET6 6345 case SCTP_IPV6_ADDRESS: 6346 if (plen != 6347 sizeof(struct sctp_asconf_addr_param)) { 6348 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6349 (int)sizeof(struct sctp_asconf_addr_param), 6350 plen); 6351 } else { 6352 memcpy(sin6.sin6_addr.s6_addr, 6353 fee->addrp.addr, 6354 sizeof(fee->addrp.addr)); 6355 lsa = (struct sockaddr *)&sin6; 6356 } 6357 break; 6358 #endif 6359 default: 6360 break; 6361 } 6362 if (lsa) { 6363 (void)sctp_set_primary_addr(stcb, sa, NULL); 6364 } 6365 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6366 stcb->asoc.peer_supports_nat = 1; 6367 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6368 /* Peer supports pr-sctp */ 6369 peer_supports_prsctp = 1; 6370 } else if (ptype == SCTP_ZERO_CHECKSUM_ACCEPTABLE) { 6371 struct sctp_zero_checksum_acceptable zero_chksum, 6372 *zero_chksum_p; 6373 6374 phdr = sctp_get_next_param(m, offset, 6375 (struct sctp_paramhdr *)&zero_chksum, 6376 sizeof(struct sctp_zero_checksum_acceptable)); 6377 if (phdr != NULL) { 6378 /* 6379 * Only send zero checksums if the upper 6380 * layer has enabled the support for the 6381 * same method as allowed by the peer. 6382 */ 6383 zero_chksum_p = (struct sctp_zero_checksum_acceptable *)phdr; 6384 if ((ntohl(zero_chksum_p->edmid) != SCTP_EDMID_NONE) && 6385 (ntohl(zero_chksum_p->edmid) == stcb->asoc.rcv_edmid)) { 6386 stcb->asoc.snd_edmid = stcb->asoc.rcv_edmid; 6387 } 6388 } 6389 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6390 /* A supported extension chunk */ 6391 struct sctp_supported_chunk_types_param *pr_supported; 6392 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6393 int num_ent, i; 6394 6395 if (plen > sizeof(local_store)) { 6396 return (-35); 6397 } 6398 phdr = sctp_get_next_param(m, offset, 6399 (struct sctp_paramhdr *)&local_store, plen); 6400 if (phdr == NULL) { 6401 return (-25); 6402 } 6403 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6404 num_ent = plen - sizeof(struct sctp_paramhdr); 6405 for (i = 0; i < num_ent; i++) { 6406 switch (pr_supported->chunk_types[i]) { 6407 case SCTP_ASCONF: 6408 peer_supports_asconf = 1; 6409 break; 6410 case SCTP_ASCONF_ACK: 6411 peer_supports_asconf_ack = 1; 6412 break; 6413 case SCTP_FORWARD_CUM_TSN: 6414 peer_supports_prsctp = 1; 6415 break; 6416 case SCTP_PACKET_DROPPED: 6417 peer_supports_pktdrop = 1; 6418 break; 6419 case SCTP_NR_SELECTIVE_ACK: 6420 peer_supports_nrsack = 1; 6421 break; 6422 case SCTP_STREAM_RESET: 6423 peer_supports_reconfig = 1; 6424 break; 6425 case SCTP_AUTHENTICATION: 6426 peer_supports_auth = 1; 6427 break; 6428 case SCTP_IDATA: 6429 peer_supports_idata = 1; 6430 break; 6431 default: 6432 /* one I have not learned yet */ 6433 break; 6434 } 6435 } 6436 } else if (ptype == SCTP_RANDOM) { 6437 if (plen > sizeof(random_store)) 6438 break; 6439 if (got_random) { 6440 /* already processed a RANDOM */ 6441 goto next_param; 6442 } 6443 phdr = sctp_get_next_param(m, offset, 6444 (struct sctp_paramhdr *)random_store, 6445 plen); 6446 if (phdr == NULL) 6447 return (-26); 6448 p_random = (struct sctp_auth_random *)phdr; 6449 random_len = plen - sizeof(*p_random); 6450 /* enforce the random length */ 6451 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6452 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6453 return (-27); 6454 } 6455 got_random = 1; 6456 } else if (ptype == SCTP_HMAC_LIST) { 6457 uint16_t num_hmacs; 6458 uint16_t i; 6459 6460 if (plen > sizeof(hmacs_store)) 6461 break; 6462 if (got_hmacs) { 6463 /* already processed a HMAC list */ 6464 goto next_param; 6465 } 6466 phdr = sctp_get_next_param(m, offset, 6467 (struct sctp_paramhdr *)hmacs_store, 6468 plen); 6469 if (phdr == NULL) 6470 return (-28); 6471 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6472 hmacs_len = plen - sizeof(*hmacs); 6473 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6474 /* validate the hmac list */ 6475 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6476 return (-29); 6477 } 6478 if (stcb->asoc.peer_hmacs != NULL) 6479 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6480 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6481 if (stcb->asoc.peer_hmacs != NULL) { 6482 for (i = 0; i < num_hmacs; i++) { 6483 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6484 ntohs(hmacs->hmac_ids[i])); 6485 } 6486 } 6487 got_hmacs = 1; 6488 } else if (ptype == SCTP_CHUNK_LIST) { 6489 int i; 6490 6491 if (plen > sizeof(chunks_store)) 6492 break; 6493 if (got_chklist) { 6494 /* already processed a Chunks list */ 6495 goto next_param; 6496 } 6497 phdr = sctp_get_next_param(m, offset, 6498 (struct sctp_paramhdr *)chunks_store, 6499 plen); 6500 if (phdr == NULL) 6501 return (-30); 6502 chunks = (struct sctp_auth_chunk_list *)phdr; 6503 num_chunks = plen - sizeof(*chunks); 6504 if (stcb->asoc.peer_auth_chunks != NULL) 6505 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6506 else 6507 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6508 for (i = 0; i < num_chunks; i++) { 6509 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6510 stcb->asoc.peer_auth_chunks); 6511 /* record asconf/asconf-ack if listed */ 6512 if (chunks->chunk_types[i] == SCTP_ASCONF) 6513 saw_asconf = 1; 6514 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6515 saw_asconf_ack = 1; 6516 } 6517 got_chklist = 1; 6518 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6519 (ptype == SCTP_STATE_COOKIE) || 6520 (ptype == SCTP_UNRECOG_PARAM) || 6521 (ptype == SCTP_COOKIE_PRESERVE) || 6522 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6523 (ptype == SCTP_ADD_IP_ADDRESS) || 6524 (ptype == SCTP_DEL_IP_ADDRESS) || 6525 (ptype == SCTP_ERROR_CAUSE_IND) || 6526 (ptype == SCTP_SUCCESS_REPORT)) { 6527 /* don't care */ 6528 } else { 6529 if ((ptype & 0x8000) == 0x0000) { 6530 /* 6531 * must stop processing the rest of the 6532 * param's. Any report bits were handled 6533 * with the call to 6534 * sctp_arethere_unrecognized_parameters() 6535 * when the INIT or INIT-ACK was first seen. 6536 */ 6537 break; 6538 } 6539 } 6540 6541 next_param: 6542 offset += SCTP_SIZE32(plen); 6543 if (offset >= limit) { 6544 break; 6545 } 6546 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6547 sizeof(param_buf)); 6548 } 6549 /* Now check to see if we need to purge any addresses */ 6550 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6551 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6552 SCTP_ADDR_NOT_IN_ASSOC) { 6553 /* This address has been removed from the asoc */ 6554 /* remove and free it */ 6555 stcb->asoc.numnets--; 6556 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6557 if (net == stcb->asoc.alternate) { 6558 sctp_free_remote_addr(stcb->asoc.alternate); 6559 stcb->asoc.alternate = NULL; 6560 } 6561 if (net == stcb->asoc.primary_destination) { 6562 stcb->asoc.primary_destination = NULL; 6563 sctp_select_primary_destination(stcb); 6564 } 6565 sctp_free_remote_addr(net); 6566 } 6567 } 6568 if ((stcb->asoc.ecn_supported == 1) && 6569 (peer_supports_ecn == 0)) { 6570 stcb->asoc.ecn_supported = 0; 6571 } 6572 if ((stcb->asoc.prsctp_supported == 1) && 6573 (peer_supports_prsctp == 0)) { 6574 stcb->asoc.prsctp_supported = 0; 6575 } 6576 if ((stcb->asoc.auth_supported == 1) && 6577 ((peer_supports_auth == 0) || 6578 (got_random == 0) || (got_hmacs == 0))) { 6579 stcb->asoc.auth_supported = 0; 6580 } 6581 if ((stcb->asoc.asconf_supported == 1) && 6582 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6583 (stcb->asoc.auth_supported == 0) || 6584 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6585 stcb->asoc.asconf_supported = 0; 6586 } 6587 if ((stcb->asoc.reconfig_supported == 1) && 6588 (peer_supports_reconfig == 0)) { 6589 stcb->asoc.reconfig_supported = 0; 6590 } 6591 if ((stcb->asoc.idata_supported == 1) && 6592 (peer_supports_idata == 0)) { 6593 stcb->asoc.idata_supported = 0; 6594 } 6595 if ((stcb->asoc.nrsack_supported == 1) && 6596 (peer_supports_nrsack == 0)) { 6597 stcb->asoc.nrsack_supported = 0; 6598 } 6599 if ((stcb->asoc.pktdrop_supported == 1) && 6600 (peer_supports_pktdrop == 0)) { 6601 stcb->asoc.pktdrop_supported = 0; 6602 } 6603 /* validate authentication required parameters */ 6604 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6605 /* peer does not support auth but sent a chunks list? */ 6606 return (-31); 6607 } 6608 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6609 /* peer supports asconf but not auth? */ 6610 return (-32); 6611 } else if ((peer_supports_asconf == 1) && 6612 (peer_supports_auth == 1) && 6613 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6614 return (-33); 6615 } 6616 /* concatenate the full random key */ 6617 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6618 if (chunks != NULL) { 6619 keylen += sizeof(*chunks) + num_chunks; 6620 } 6621 new_key = sctp_alloc_key(keylen); 6622 if (new_key != NULL) { 6623 /* copy in the RANDOM */ 6624 if (p_random != NULL) { 6625 keylen = sizeof(*p_random) + random_len; 6626 memcpy(new_key->key, p_random, keylen); 6627 } else { 6628 keylen = 0; 6629 } 6630 /* append in the AUTH chunks */ 6631 if (chunks != NULL) { 6632 memcpy(new_key->key + keylen, chunks, 6633 sizeof(*chunks) + num_chunks); 6634 keylen += sizeof(*chunks) + num_chunks; 6635 } 6636 /* append in the HMACs */ 6637 if (hmacs != NULL) { 6638 memcpy(new_key->key + keylen, hmacs, 6639 sizeof(*hmacs) + hmacs_len); 6640 } 6641 } else { 6642 /* failed to get memory for the key */ 6643 return (-34); 6644 } 6645 if (stcb->asoc.authinfo.peer_random != NULL) 6646 sctp_free_key(stcb->asoc.authinfo.peer_random); 6647 stcb->asoc.authinfo.peer_random = new_key; 6648 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6649 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6650 6651 return (0); 6652 } 6653 6654 int 6655 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6656 struct sctp_nets *net) 6657 { 6658 /* make sure the requested primary address exists in the assoc */ 6659 if (net == NULL && sa) 6660 net = sctp_findnet(stcb, sa); 6661 6662 if (net == NULL) { 6663 /* didn't find the requested primary address! */ 6664 return (-1); 6665 } else { 6666 /* set the primary address */ 6667 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6668 /* Must be confirmed, so queue to set */ 6669 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6670 return (0); 6671 } 6672 stcb->asoc.primary_destination = net; 6673 if (((net->dest_state & SCTP_ADDR_PF) == 0) && 6674 (stcb->asoc.alternate != NULL)) { 6675 sctp_free_remote_addr(stcb->asoc.alternate); 6676 stcb->asoc.alternate = NULL; 6677 } 6678 net = TAILQ_FIRST(&stcb->asoc.nets); 6679 if (net != stcb->asoc.primary_destination) { 6680 /* 6681 * first one on the list is NOT the primary 6682 * sctp_cmpaddr() is much more efficient if the 6683 * primary is the first on the list, make it so. 6684 */ 6685 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6686 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6687 } 6688 return (0); 6689 } 6690 } 6691 6692 bool 6693 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6694 { 6695 struct sctpasochead *head; 6696 struct sctp_tcb *stcb; 6697 6698 SCTP_INP_INFO_LOCK_ASSERT(); 6699 6700 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, SCTP_BASE_INFO(hashasocmark))]; 6701 LIST_FOREACH(stcb, head, sctp_asocs) { 6702 /* 6703 * We choose not to lock anything here. TCB's can't be 6704 * removed since we have the read lock, so they can't be 6705 * freed on us, same thing for the INP. I may be wrong with 6706 * this assumption, but we will go with it for now :-) 6707 */ 6708 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6709 continue; 6710 } 6711 if (stcb->asoc.my_vtag == tag) { 6712 /* candidate */ 6713 if (stcb->rport != rport) { 6714 continue; 6715 } 6716 if (stcb->sctp_ep->sctp_lport != lport) { 6717 continue; 6718 } 6719 /* The tag is currently used, so don't use it. */ 6720 return (false); 6721 } 6722 } 6723 return (!sctp_is_in_timewait(tag, lport, rport, now->tv_sec)); 6724 } 6725 6726 static void 6727 sctp_drain_mbufs(struct sctp_tcb *stcb) 6728 { 6729 /* 6730 * We must hunt this association for MBUF's past the cumack (i.e. 6731 * out of order data that we can renege on). 6732 */ 6733 struct sctp_association *asoc; 6734 struct sctp_tmit_chunk *chk, *nchk; 6735 uint32_t cumulative_tsn_p1; 6736 struct sctp_queued_to_read *control, *ncontrol; 6737 int cnt, strmat; 6738 uint32_t gap, i; 6739 int fnd = 0; 6740 6741 /* We look for anything larger than the cum-ack + 1 */ 6742 6743 asoc = &stcb->asoc; 6744 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6745 /* none we can reneg on. */ 6746 return; 6747 } 6748 SCTP_STAT_INCR(sctps_protocol_drains_done); 6749 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6750 cnt = 0; 6751 /* Ok that was fun, now we will drain all the inbound streams? */ 6752 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6753 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6754 #ifdef INVARIANTS 6755 if (control->on_strm_q != SCTP_ON_ORDERED) { 6756 panic("Huh control: %p on_q: %d -- not ordered?", 6757 control, control->on_strm_q); 6758 } 6759 #endif 6760 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6761 /* Yep it is above cum-ack */ 6762 cnt++; 6763 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6764 KASSERT(control->length > 0, ("control has zero length")); 6765 if (asoc->size_on_all_streams >= control->length) { 6766 asoc->size_on_all_streams -= control->length; 6767 } else { 6768 #ifdef INVARIANTS 6769 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6770 #else 6771 asoc->size_on_all_streams = 0; 6772 #endif 6773 } 6774 sctp_ucount_decr(asoc->cnt_on_all_streams); 6775 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6776 if (control->on_read_q) { 6777 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6778 control->on_read_q = 0; 6779 } 6780 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6781 control->on_strm_q = 0; 6782 if (control->data) { 6783 sctp_m_freem(control->data); 6784 control->data = NULL; 6785 } 6786 sctp_free_remote_addr(control->whoFrom); 6787 /* Now its reasm? */ 6788 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6789 cnt++; 6790 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6791 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6792 if (asoc->size_on_reasm_queue >= chk->send_size) { 6793 asoc->size_on_reasm_queue -= chk->send_size; 6794 } else { 6795 #ifdef INVARIANTS 6796 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6797 #else 6798 asoc->size_on_reasm_queue = 0; 6799 #endif 6800 } 6801 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6802 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6803 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6804 if (chk->data) { 6805 sctp_m_freem(chk->data); 6806 chk->data = NULL; 6807 } 6808 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6809 } 6810 sctp_free_a_readq(stcb, control); 6811 } 6812 } 6813 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6814 #ifdef INVARIANTS 6815 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6816 panic("Huh control: %p on_q: %d -- not unordered?", 6817 control, control->on_strm_q); 6818 } 6819 #endif 6820 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6821 /* Yep it is above cum-ack */ 6822 cnt++; 6823 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6824 KASSERT(control->length > 0, ("control has zero length")); 6825 if (asoc->size_on_all_streams >= control->length) { 6826 asoc->size_on_all_streams -= control->length; 6827 } else { 6828 #ifdef INVARIANTS 6829 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6830 #else 6831 asoc->size_on_all_streams = 0; 6832 #endif 6833 } 6834 sctp_ucount_decr(asoc->cnt_on_all_streams); 6835 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6836 if (control->on_read_q) { 6837 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6838 control->on_read_q = 0; 6839 } 6840 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6841 control->on_strm_q = 0; 6842 if (control->data) { 6843 sctp_m_freem(control->data); 6844 control->data = NULL; 6845 } 6846 sctp_free_remote_addr(control->whoFrom); 6847 /* Now its reasm? */ 6848 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6849 cnt++; 6850 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6851 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6852 if (asoc->size_on_reasm_queue >= chk->send_size) { 6853 asoc->size_on_reasm_queue -= chk->send_size; 6854 } else { 6855 #ifdef INVARIANTS 6856 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6857 #else 6858 asoc->size_on_reasm_queue = 0; 6859 #endif 6860 } 6861 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6862 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6863 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6864 if (chk->data) { 6865 sctp_m_freem(chk->data); 6866 chk->data = NULL; 6867 } 6868 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6869 } 6870 sctp_free_a_readq(stcb, control); 6871 } 6872 } 6873 } 6874 if (cnt) { 6875 /* We must back down to see what the new highest is */ 6876 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6877 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6878 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6879 asoc->highest_tsn_inside_map = i; 6880 fnd = 1; 6881 break; 6882 } 6883 } 6884 if (!fnd) { 6885 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6886 } 6887 6888 /* 6889 * Question, should we go through the delivery queue? The 6890 * only reason things are on here is the app not reading OR 6891 * a p-d-api up. An attacker COULD send enough in to 6892 * initiate the PD-API and then send a bunch of stuff to 6893 * other streams... these would wind up on the delivery 6894 * queue.. and then we would not get to them. But in order 6895 * to do this I then have to back-track and un-deliver 6896 * sequence numbers in streams.. el-yucko. I think for now 6897 * we will NOT look at the delivery queue and leave it to be 6898 * something to consider later. An alternative would be to 6899 * abort the P-D-API with a notification and then deliver 6900 * the data.... Or another method might be to keep track of 6901 * how many times the situation occurs and if we see a 6902 * possible attack underway just abort the association. 6903 */ 6904 #ifdef SCTP_DEBUG 6905 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6906 #endif 6907 /* 6908 * Now do we need to find a new 6909 * asoc->highest_tsn_inside_map? 6910 */ 6911 asoc->last_revoke_count = cnt; 6912 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6913 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6914 /* sa_ignore NO_NULL_CHK */ 6915 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6916 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6917 } 6918 /* 6919 * Another issue, in un-setting the TSN's in the mapping array we 6920 * DID NOT adjust the highest_tsn marker. This will cause one of 6921 * two things to occur. It may cause us to do extra work in checking 6922 * for our mapping array movement. More importantly it may cause us 6923 * to SACK every datagram. This may not be a bad thing though since 6924 * we will recover once we get our cum-ack above and all this stuff 6925 * we dumped recovered. 6926 */ 6927 } 6928 6929 static void 6930 sctp_drain(void) 6931 { 6932 struct epoch_tracker et; 6933 6934 VNET_ITERATOR_DECL(vnet_iter); 6935 6936 NET_EPOCH_ENTER(et); 6937 /* 6938 * We must walk the PCB lists for ALL associations here. The system 6939 * is LOW on MBUF's and needs help. This is where reneging will 6940 * occur. We really hope this does NOT happen! 6941 */ 6942 VNET_LIST_RLOCK_NOSLEEP(); 6943 VNET_FOREACH(vnet_iter) { 6944 CURVNET_SET(vnet_iter); 6945 struct sctp_inpcb *inp; 6946 struct sctp_tcb *stcb; 6947 6948 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6949 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6950 #ifdef VIMAGE 6951 continue; 6952 #else 6953 NET_EPOCH_EXIT(et); 6954 return; 6955 #endif 6956 } 6957 SCTP_INP_INFO_RLOCK(); 6958 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6959 /* For each endpoint */ 6960 SCTP_INP_RLOCK(inp); 6961 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6962 /* For each association */ 6963 SCTP_TCB_LOCK(stcb); 6964 sctp_drain_mbufs(stcb); 6965 SCTP_TCB_UNLOCK(stcb); 6966 } 6967 SCTP_INP_RUNLOCK(inp); 6968 } 6969 SCTP_INP_INFO_RUNLOCK(); 6970 CURVNET_RESTORE(); 6971 } 6972 VNET_LIST_RUNLOCK_NOSLEEP(); 6973 NET_EPOCH_EXIT(et); 6974 } 6975 6976 EVENTHANDLER_DEFINE(vm_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT); 6977 EVENTHANDLER_DEFINE(mbuf_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT); 6978 6979 /* 6980 * start a new iterator 6981 * iterates through all endpoints and associations based on the pcb_state 6982 * flags and asoc_state. "af" (mandatory) is executed for all matching 6983 * assocs and "ef" (optional) is executed when the iterator completes. 6984 * "inpf" (optional) is executed for each new endpoint as it is being 6985 * iterated through. inpe (optional) is called when the inp completes 6986 * its way through all the stcbs. 6987 */ 6988 int 6989 sctp_initiate_iterator(inp_func inpf, 6990 asoc_func af, 6991 inp_func inpe, 6992 uint32_t pcb_state, 6993 uint32_t pcb_features, 6994 uint32_t asoc_state, 6995 void *argp, 6996 uint32_t argi, 6997 end_func ef, 6998 struct sctp_inpcb *s_inp, 6999 uint8_t chunk_output_off) 7000 { 7001 struct sctp_iterator *it = NULL; 7002 7003 if (af == NULL) { 7004 return (-1); 7005 } 7006 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7007 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7008 SCTP_BASE_VAR(sctp_pcb_initialized)); 7009 return (-1); 7010 } 7011 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7012 SCTP_M_ITER); 7013 if (it == NULL) { 7014 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7015 return (-1); 7016 } 7017 memset(it, 0, sizeof(*it)); 7018 it->function_assoc = af; 7019 it->function_inp = inpf; 7020 if (inpf) 7021 it->done_current_ep = 0; 7022 else 7023 it->done_current_ep = 1; 7024 it->function_atend = ef; 7025 it->pointer = argp; 7026 it->val = argi; 7027 it->pcb_flags = pcb_state; 7028 it->pcb_features = pcb_features; 7029 it->asoc_state = asoc_state; 7030 it->function_inp_end = inpe; 7031 it->no_chunk_output = chunk_output_off; 7032 it->vn = curvnet; 7033 if (s_inp) { 7034 /* Assume lock is held here */ 7035 it->inp = s_inp; 7036 SCTP_INP_INCR_REF(it->inp); 7037 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7038 } else { 7039 SCTP_INP_INFO_RLOCK(); 7040 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7041 if (it->inp) { 7042 SCTP_INP_INCR_REF(it->inp); 7043 } 7044 SCTP_INP_INFO_RUNLOCK(); 7045 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7046 } 7047 SCTP_IPI_ITERATOR_WQ_LOCK(); 7048 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7049 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7050 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7051 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7052 SCTP_FREE(it, SCTP_M_ITER); 7053 return (-1); 7054 } 7055 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7056 if (sctp_it_ctl.iterator_running == 0) { 7057 sctp_wakeup_iterator(); 7058 } 7059 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7060 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7061 return (0); 7062 } 7063 7064 /* 7065 * Atomically add flags to the sctp_flags of an inp. 7066 * To be used when the write lock of the inp is not held. 7067 */ 7068 void 7069 sctp_pcb_add_flags(struct sctp_inpcb *inp, uint32_t flags) 7070 { 7071 uint32_t old_flags, new_flags; 7072 7073 do { 7074 old_flags = inp->sctp_flags; 7075 new_flags = old_flags | flags; 7076 } while (atomic_cmpset_int(&inp->sctp_flags, old_flags, new_flags) == 0); 7077 } 7078