1/*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: releng/11.0/sys/netinet/sctp_pcb.c 303956 2016-08-11 10:14:03Z tuexen $"); 35 36#include <netinet/sctp_os.h> 37#include <sys/proc.h> 38#include <netinet/sctp_var.h> 39#include <netinet/sctp_sysctl.h> 40#include <netinet/sctp_pcb.h> 41#include <netinet/sctputil.h> 42#include <netinet/sctp.h> 43#include <netinet/sctp_header.h> 44#include <netinet/sctp_asconf.h> 45#include <netinet/sctp_output.h> 46#include <netinet/sctp_timer.h> 47#include <netinet/sctp_bsd_addr.h> 48#include <netinet/sctp_dtrace_define.h> 49#if defined(INET) || defined(INET6) 50#include <netinet/udp.h> 51#endif 52#ifdef INET6 53#include <netinet6/ip6_var.h> 54#endif 55#include <sys/sched.h> 56#include <sys/smp.h> 57#include <sys/unistd.h> 58 59 60VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62/* FIX: we don't handle multiple link local scopes */ 63/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64#ifdef INET6 65int 66SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67{ 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return (0); 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79} 80 81#endif 82 83void 84sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85{ 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100} 101 102/*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147struct sctp_vrf * 148sctp_allocate_vrf(int vrf_id) 149{ 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163#ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165#endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181#ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183#endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192} 193 194 195struct sctp_ifn * 196sctp_find_ifn(void *ifn, uint32_t ifn_index) 197{ 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215} 216 217 218struct sctp_vrf * 219sctp_find_vrf(uint32_t vrf_id) 220{ 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231} 232 233 234void 235sctp_free_vrf(struct sctp_vrf *vrf) 236{ 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247} 248 249 250void 251sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252{ 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261} 262 263 264void 265sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266{ 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273} 274 275 276void 277sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278{ 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287} 288 289 290static void 291sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292{ 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310} 311 312 313void 314sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316{ 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354} 355 356 357void 358sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360{ 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398} 399 400 401/*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406static void 407sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408{ 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418#ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422#endif 423#ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427#endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 434 sctp_ifnp->registered_af = ifa_af; 435 } 436} 437 438 439/*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445static void 446sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447{ 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453#ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457#endif 458#ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462#endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488} 489 490 491struct sctp_ifa * 492sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496{ 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505#ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508#endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532#ifdef INVARIANTS 533 panic("No memory for IFN"); 534#endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608#ifdef INVARIANTS 609 panic("No memory for IFA"); 610#endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623#ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = &sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641#endif 642#ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = &sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661#endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 bzero(wi, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 SCTP_WQ_ADDR_UNLOCK(); 714 715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 716 (struct sctp_inpcb *)NULL, 717 (struct sctp_tcb *)NULL, 718 (struct sctp_nets *)NULL); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724} 725 726void 727sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729{ 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739#ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742#endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789#ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795#endif 796 797out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 bzero(wi, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 SCTP_WQ_ADDR_UNLOCK(); 826 827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 828 (struct sctp_inpcb *)NULL, 829 (struct sctp_tcb *)NULL, 830 (struct sctp_nets *)NULL); 831 } 832 return; 833} 834 835 836static int 837sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838{ 839 int loopback_scope; 840 841#if defined(INET) 842 int ipv4_local_scope, ipv4_addr_legal; 843 844#endif 845#if defined(INET6) 846 int local_scope, site_scope, ipv6_addr_legal; 847 848#endif 849 struct sctp_vrf *vrf; 850 struct sctp_ifn *sctp_ifn; 851 struct sctp_ifa *sctp_ifa; 852 853 loopback_scope = stcb->asoc.scope.loopback_scope; 854#if defined(INET) 855 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 856 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 857#endif 858#if defined(INET6) 859 local_scope = stcb->asoc.scope.local_scope; 860 site_scope = stcb->asoc.scope.site_scope; 861 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 862#endif 863 864 SCTP_IPI_ADDR_RLOCK(); 865 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 866 if (vrf == NULL) { 867 /* no vrf, no addresses */ 868 SCTP_IPI_ADDR_RUNLOCK(); 869 return (0); 870 } 871 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 872 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 873 if ((loopback_scope == 0) && 874 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 875 continue; 876 } 877 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 878 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 879 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 880 /* 881 * We allow pending addresses, where 882 * we have sent an asconf-add to be 883 * considered valid. 884 */ 885 continue; 886 } 887 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 888 continue; 889 } 890 switch (sctp_ifa->address.sa.sa_family) { 891#ifdef INET 892 case AF_INET: 893 if (ipv4_addr_legal) { 894 struct sockaddr_in *sin, 895 *rsin; 896 897 sin = &sctp_ifa->address.sin; 898 rsin = (struct sockaddr_in *)to; 899 if ((ipv4_local_scope == 0) && 900 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 901 continue; 902 } 903 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 904 &sin->sin_addr) != 0) { 905 continue; 906 } 907 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 908 SCTP_IPI_ADDR_RUNLOCK(); 909 return (1); 910 } 911 } 912 break; 913#endif 914#ifdef INET6 915 case AF_INET6: 916 if (ipv6_addr_legal) { 917 struct sockaddr_in6 *sin6, 918 *rsin6; 919 920 sin6 = &sctp_ifa->address.sin6; 921 rsin6 = (struct sockaddr_in6 *)to; 922 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 923 &sin6->sin6_addr) != 0) { 924 continue; 925 } 926 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 927 if (local_scope == 0) 928 continue; 929 if (sin6->sin6_scope_id == 0) { 930 if (sa6_recoverscope(sin6) != 0) 931 continue; 932 } 933 } 934 if ((site_scope == 0) && 935 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 936 continue; 937 } 938 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 939 SCTP_IPI_ADDR_RUNLOCK(); 940 return (1); 941 } 942 } 943 break; 944#endif 945 default: 946 /* TSNH */ 947 break; 948 } 949 } 950 } 951 } else { 952 struct sctp_laddr *laddr; 953 954 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 955 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 956 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 957 continue; 958 } 959 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 960 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 961 /* 962 * We allow pending addresses, where we have 963 * sent an asconf-add to be considered 964 * valid. 965 */ 966 continue; 967 } 968 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 969 continue; 970 } 971 switch (to->sa_family) { 972#ifdef INET 973 case AF_INET: 974 { 975 struct sockaddr_in *sin, *rsin; 976 977 sin = &laddr->ifa->address.sin; 978 rsin = (struct sockaddr_in *)to; 979 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 980 SCTP_IPI_ADDR_RUNLOCK(); 981 return (1); 982 } 983 break; 984 } 985#endif 986#ifdef INET6 987 case AF_INET6: 988 { 989 struct sockaddr_in6 *sin6, *rsin6; 990 991 sin6 = &laddr->ifa->address.sin6; 992 rsin6 = (struct sockaddr_in6 *)to; 993 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (1); 996 } 997 break; 998 } 999 1000#endif 1001 default: 1002 /* TSNH */ 1003 break; 1004 } 1005 1006 } 1007 } 1008 SCTP_IPI_ADDR_RUNLOCK(); 1009 return (0); 1010} 1011 1012 1013static struct sctp_tcb * 1014sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1015 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1016{ 1017 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1018 /* 1019 * If we support the TCP model, then we must now dig through to see 1020 * if we can find our endpoint in the list of tcp ep's. 1021 */ 1022 uint16_t lport, rport; 1023 struct sctppcbhead *ephead; 1024 struct sctp_inpcb *inp; 1025 struct sctp_laddr *laddr; 1026 struct sctp_tcb *stcb; 1027 struct sctp_nets *net; 1028 1029 if ((to == NULL) || (from == NULL)) { 1030 return (NULL); 1031 } 1032 switch (to->sa_family) { 1033#ifdef INET 1034 case AF_INET: 1035 if (from->sa_family == AF_INET) { 1036 lport = ((struct sockaddr_in *)to)->sin_port; 1037 rport = ((struct sockaddr_in *)from)->sin_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042#endif 1043#ifdef INET6 1044 case AF_INET6: 1045 if (from->sa_family == AF_INET6) { 1046 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1047 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1048 } else { 1049 return (NULL); 1050 } 1051 break; 1052#endif 1053 default: 1054 return (NULL); 1055 } 1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1057 /* 1058 * Ok now for each of the guys in this bucket we must look and see: 1059 * - Does the remote port match. - Does there single association's 1060 * addresses match this address (to). If so we update p_ep to point 1061 * to this ep and return the tcb from it. 1062 */ 1063 LIST_FOREACH(inp, ephead, sctp_hash) { 1064 SCTP_INP_RLOCK(inp); 1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 if (lport != inp->sctp_lport) { 1070 SCTP_INP_RUNLOCK(inp); 1071 continue; 1072 } 1073 switch (to->sa_family) { 1074#ifdef INET 1075 case AF_INET: 1076 { 1077 struct sockaddr_in *sin; 1078 1079 sin = (struct sockaddr_in *)to; 1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1081 &sin->sin_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087#endif 1088#ifdef INET6 1089 case AF_INET6: 1090 { 1091 struct sockaddr_in6 *sin6; 1092 1093 sin6 = (struct sockaddr_in6 *)to; 1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1095 &sin6->sin6_addr) != 0) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 break; 1100 } 1101#endif 1102 default: 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 if (inp->def_vrf_id != vrf_id) { 1107 SCTP_INP_RUNLOCK(inp); 1108 continue; 1109 } 1110 /* check to see if the ep has one of the addresses */ 1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1112 /* We are NOT bound all, so look further */ 1113 int match = 0; 1114 1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1116 1117 if (laddr->ifa == NULL) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1119 continue; 1120 } 1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1123 continue; 1124 } 1125 if (laddr->ifa->address.sa.sa_family == 1126 to->sa_family) { 1127 /* see if it matches */ 1128#ifdef INET 1129 if (from->sa_family == AF_INET) { 1130 struct sockaddr_in *intf_addr, 1131 *sin; 1132 1133 intf_addr = &laddr->ifa->address.sin; 1134 sin = (struct sockaddr_in *)to; 1135 if (sin->sin_addr.s_addr == 1136 intf_addr->sin_addr.s_addr) { 1137 match = 1; 1138 break; 1139 } 1140 } 1141#endif 1142#ifdef INET6 1143 if (from->sa_family == AF_INET6) { 1144 struct sockaddr_in6 *intf_addr6; 1145 struct sockaddr_in6 *sin6; 1146 1147 sin6 = (struct sockaddr_in6 *) 1148 to; 1149 intf_addr6 = &laddr->ifa->address.sin6; 1150 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1152 intf_addr6)) { 1153 match = 1; 1154 break; 1155 } 1156 } 1157#endif 1158 } 1159 } 1160 if (match == 0) { 1161 /* This endpoint does not have this address */ 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 } 1166 /* 1167 * Ok if we hit here the ep has the address, does it hold 1168 * the tcb? 1169 */ 1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1171 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1172 if (stcb == NULL) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 SCTP_TCB_LOCK(stcb); 1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->rport != rport) { 1183 /* remote port does not match. */ 1184 SCTP_TCB_UNLOCK(stcb); 1185 SCTP_INP_RUNLOCK(inp); 1186 continue; 1187 } 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 continue; 1197 } 1198 /* Does this TCB have a matching address? */ 1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200 1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1202 /* not the same family, can't be a match */ 1203 continue; 1204 } 1205 switch (from->sa_family) { 1206#ifdef INET 1207 case AF_INET: 1208 { 1209 struct sockaddr_in *sin, *rsin; 1210 1211 sin = (struct sockaddr_in *)&net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)from; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 /* 1220 * Update the endpoint 1221 * pointer 1222 */ 1223 *inp_p = inp; 1224 SCTP_INP_RUNLOCK(inp); 1225 return (stcb); 1226 } 1227 break; 1228 } 1229#endif 1230#ifdef INET6 1231 case AF_INET6: 1232 { 1233 struct sockaddr_in6 *sin6, *rsin6; 1234 1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1236 rsin6 = (struct sockaddr_in6 *)from; 1237 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1238 rsin6)) { 1239 /* found it */ 1240 if (netp != NULL) { 1241 *netp = net; 1242 } 1243 /* 1244 * Update the endpoint 1245 * pointer 1246 */ 1247 *inp_p = inp; 1248 SCTP_INP_RUNLOCK(inp); 1249 return (stcb); 1250 } 1251 break; 1252 } 1253#endif 1254 default: 1255 /* TSNH */ 1256 break; 1257 } 1258 } 1259 SCTP_TCB_UNLOCK(stcb); 1260 SCTP_INP_RUNLOCK(inp); 1261 } 1262 return (NULL); 1263} 1264 1265 1266/* 1267 * rules for use 1268 * 1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1272 * NULL. 1273 */ 1274 1275struct sctp_tcb * 1276sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1278{ 1279 struct sctpasochead *head; 1280 struct sctp_inpcb *inp; 1281 struct sctp_tcb *stcb = NULL; 1282 struct sctp_nets *net; 1283 uint16_t rport; 1284 1285 inp = *inp_p; 1286 switch (remote->sa_family) { 1287#ifdef INET 1288 case AF_INET: 1289 rport = (((struct sockaddr_in *)remote)->sin_port); 1290 break; 1291#endif 1292#ifdef INET6 1293 case AF_INET6: 1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1295 break; 1296#endif 1297 default: 1298 return (NULL); 1299 } 1300 if (locked_tcb) { 1301 /* 1302 * UN-lock so we can do proper locking here this occurs when 1303 * called from load_addresses_from_init. 1304 */ 1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1306 SCTP_TCB_UNLOCK(locked_tcb); 1307 } 1308 SCTP_INP_INFO_RLOCK(); 1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1311 /*- 1312 * Now either this guy is our listener or it's the 1313 * connector. If it is the one that issued the connect, then 1314 * it's only chance is to be the first TCB in the list. If 1315 * it is the acceptor, then do the special_lookup to hash 1316 * and find the real inp. 1317 */ 1318 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1319 /* to is peer addr, from is my addr */ 1320 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1321 netp, inp->def_vrf_id); 1322 if ((stcb != NULL) && (locked_tcb == NULL)) { 1323 /* we have a locked tcb, lower refcount */ 1324 SCTP_INP_DECR_REF(inp); 1325 } 1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1328 SCTP_TCB_LOCK(locked_tcb); 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1331 } 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } else { 1335 SCTP_INP_WLOCK(inp); 1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1337 goto null_return; 1338 } 1339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1340 if (stcb == NULL) { 1341 goto null_return; 1342 } 1343 SCTP_TCB_LOCK(stcb); 1344 1345 if (stcb->rport != rport) { 1346 /* remote port does not match. */ 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1355 SCTP_TCB_UNLOCK(stcb); 1356 goto null_return; 1357 } 1358 /* now look at the list of remote addresses */ 1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1360#ifdef INVARIANTS 1361 if (net == (TAILQ_NEXT(net, sctp_next))) { 1362 panic("Corrupt net list"); 1363 } 1364#endif 1365 if (net->ro._l_addr.sa.sa_family != 1366 remote->sa_family) { 1367 /* not the same family */ 1368 continue; 1369 } 1370 switch (remote->sa_family) { 1371#ifdef INET 1372 case AF_INET: 1373 { 1374 struct sockaddr_in *sin, 1375 *rsin; 1376 1377 sin = (struct sockaddr_in *) 1378 &net->ro._l_addr; 1379 rsin = (struct sockaddr_in *)remote; 1380 if (sin->sin_addr.s_addr == 1381 rsin->sin_addr.s_addr) { 1382 /* found it */ 1383 if (netp != NULL) { 1384 *netp = net; 1385 } 1386 if (locked_tcb == NULL) { 1387 SCTP_INP_DECR_REF(inp); 1388 } else if (locked_tcb != stcb) { 1389 SCTP_TCB_LOCK(locked_tcb); 1390 } 1391 if (locked_tcb) { 1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1393 } 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400#endif 1401#ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429#endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1445 if (stcb->rport != rport) { 1446 /* remote port does not match */ 1447 continue; 1448 } 1449 SCTP_TCB_LOCK(stcb); 1450 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1455 SCTP_TCB_UNLOCK(stcb); 1456 continue; 1457 } 1458 /* now look at the list of remote addresses */ 1459 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1460#ifdef INVARIANTS 1461 if (net == (TAILQ_NEXT(net, sctp_next))) { 1462 panic("Corrupt net list"); 1463 } 1464#endif 1465 if (net->ro._l_addr.sa.sa_family != 1466 remote->sa_family) { 1467 /* not the same family */ 1468 continue; 1469 } 1470 switch (remote->sa_family) { 1471#ifdef INET 1472 case AF_INET: 1473 { 1474 struct sockaddr_in *sin, 1475 *rsin; 1476 1477 sin = (struct sockaddr_in *) 1478 &net->ro._l_addr; 1479 rsin = (struct sockaddr_in *)remote; 1480 if (sin->sin_addr.s_addr == 1481 rsin->sin_addr.s_addr) { 1482 /* found it */ 1483 if (netp != NULL) { 1484 *netp = net; 1485 } 1486 if (locked_tcb == NULL) { 1487 SCTP_INP_DECR_REF(inp); 1488 } else if (locked_tcb != stcb) { 1489 SCTP_TCB_LOCK(locked_tcb); 1490 } 1491 if (locked_tcb) { 1492 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1493 } 1494 SCTP_INP_WUNLOCK(inp); 1495 SCTP_INP_INFO_RUNLOCK(); 1496 return (stcb); 1497 } 1498 break; 1499 } 1500#endif 1501#ifdef INET6 1502 case AF_INET6: 1503 { 1504 struct sockaddr_in6 *sin6, 1505 *rsin6; 1506 1507 sin6 = (struct sockaddr_in6 *) 1508 &net->ro._l_addr; 1509 rsin6 = (struct sockaddr_in6 *)remote; 1510 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1511 rsin6)) { 1512 /* found it */ 1513 if (netp != NULL) { 1514 *netp = net; 1515 } 1516 if (locked_tcb == NULL) { 1517 SCTP_INP_DECR_REF(inp); 1518 } else if (locked_tcb != stcb) { 1519 SCTP_TCB_LOCK(locked_tcb); 1520 } 1521 if (locked_tcb) { 1522 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1523 } 1524 SCTP_INP_WUNLOCK(inp); 1525 SCTP_INP_INFO_RUNLOCK(); 1526 return (stcb); 1527 } 1528 break; 1529 } 1530#endif 1531 default: 1532 /* TSNH */ 1533 break; 1534 } 1535 } 1536 SCTP_TCB_UNLOCK(stcb); 1537 } 1538 } 1539null_return: 1540 /* clean up for returning null */ 1541 if (locked_tcb) { 1542 SCTP_TCB_LOCK(locked_tcb); 1543 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1544 } 1545 SCTP_INP_WUNLOCK(inp); 1546 SCTP_INP_INFO_RUNLOCK(); 1547 /* not found */ 1548 return (NULL); 1549} 1550 1551 1552/* 1553 * Find an association for a specific endpoint using the association id given 1554 * out in the COMM_UP notification 1555 */ 1556struct sctp_tcb * 1557sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1558{ 1559 /* 1560 * Use my the assoc_id to find a endpoint 1561 */ 1562 struct sctpasochead *head; 1563 struct sctp_tcb *stcb; 1564 uint32_t id; 1565 1566 if (inp == NULL) { 1567 SCTP_PRINTF("TSNH ep_associd\n"); 1568 return (NULL); 1569 } 1570 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1571 SCTP_PRINTF("TSNH ep_associd0\n"); 1572 return (NULL); 1573 } 1574 id = (uint32_t) asoc_id; 1575 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1576 if (head == NULL) { 1577 /* invalid id TSNH */ 1578 SCTP_PRINTF("TSNH ep_associd1\n"); 1579 return (NULL); 1580 } 1581 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1582 if (stcb->asoc.assoc_id == id) { 1583 if (inp != stcb->sctp_ep) { 1584 /* 1585 * some other guy has the same id active (id 1586 * collision ??). 1587 */ 1588 SCTP_PRINTF("TSNH ep_associd2\n"); 1589 continue; 1590 } 1591 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1592 continue; 1593 } 1594 if (want_lock) { 1595 SCTP_TCB_LOCK(stcb); 1596 } 1597 return (stcb); 1598 } 1599 } 1600 return (NULL); 1601} 1602 1603 1604struct sctp_tcb * 1605sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1606{ 1607 struct sctp_tcb *stcb; 1608 1609 SCTP_INP_RLOCK(inp); 1610 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1611 SCTP_INP_RUNLOCK(inp); 1612 return (stcb); 1613} 1614 1615 1616/* 1617 * Endpoint probe expects that the INP_INFO is locked. 1618 */ 1619static struct sctp_inpcb * 1620sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1621 uint16_t lport, uint32_t vrf_id) 1622{ 1623 struct sctp_inpcb *inp; 1624 struct sctp_laddr *laddr; 1625 1626#ifdef INET 1627 struct sockaddr_in *sin; 1628 1629#endif 1630#ifdef INET6 1631 struct sockaddr_in6 *sin6; 1632 struct sockaddr_in6 *intf_addr6; 1633 1634#endif 1635 int fnd; 1636 1637#ifdef INET 1638 sin = NULL; 1639#endif 1640#ifdef INET6 1641 sin6 = NULL; 1642#endif 1643 switch (nam->sa_family) { 1644#ifdef INET 1645 case AF_INET: 1646 sin = (struct sockaddr_in *)nam; 1647 break; 1648#endif 1649#ifdef INET6 1650 case AF_INET6: 1651 sin6 = (struct sockaddr_in6 *)nam; 1652 break; 1653#endif 1654 default: 1655 /* unsupported family */ 1656 return (NULL); 1657 } 1658 1659 if (head == NULL) 1660 return (NULL); 1661 1662 LIST_FOREACH(inp, head, sctp_hash) { 1663 SCTP_INP_RLOCK(inp); 1664 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1665 SCTP_INP_RUNLOCK(inp); 1666 continue; 1667 } 1668 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1669 (inp->sctp_lport == lport)) { 1670 /* got it */ 1671 switch (nam->sa_family) { 1672#ifdef INET 1673 case AF_INET: 1674 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1675 SCTP_IPV6_V6ONLY(inp)) { 1676 /* 1677 * IPv4 on a IPv6 socket with ONLY 1678 * IPv6 set 1679 */ 1680 SCTP_INP_RUNLOCK(inp); 1681 continue; 1682 } 1683 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1684 &sin->sin_addr) != 0) { 1685 SCTP_INP_RUNLOCK(inp); 1686 continue; 1687 } 1688 break; 1689#endif 1690#ifdef INET6 1691 case AF_INET6: 1692 /* 1693 * A V6 address and the endpoint is NOT 1694 * bound V6 1695 */ 1696 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1697 SCTP_INP_RUNLOCK(inp); 1698 continue; 1699 } 1700 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1701 &sin6->sin6_addr) != 0) { 1702 SCTP_INP_RUNLOCK(inp); 1703 continue; 1704 } 1705 break; 1706#endif 1707 default: 1708 break; 1709 } 1710 /* does a VRF id match? */ 1711 fnd = 0; 1712 if (inp->def_vrf_id == vrf_id) 1713 fnd = 1; 1714 1715 SCTP_INP_RUNLOCK(inp); 1716 if (!fnd) 1717 continue; 1718 return (inp); 1719 } 1720 SCTP_INP_RUNLOCK(inp); 1721 } 1722 switch (nam->sa_family) { 1723#ifdef INET 1724 case AF_INET: 1725 if (sin->sin_addr.s_addr == INADDR_ANY) { 1726 /* Can't hunt for one that has no address specified */ 1727 return (NULL); 1728 } 1729 break; 1730#endif 1731#ifdef INET6 1732 case AF_INET6: 1733 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1734 /* Can't hunt for one that has no address specified */ 1735 return (NULL); 1736 } 1737 break; 1738#endif 1739 default: 1740 break; 1741 } 1742 /* 1743 * ok, not bound to all so see if we can find a EP bound to this 1744 * address. 1745 */ 1746 LIST_FOREACH(inp, head, sctp_hash) { 1747 SCTP_INP_RLOCK(inp); 1748 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1749 SCTP_INP_RUNLOCK(inp); 1750 continue; 1751 } 1752 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1753 SCTP_INP_RUNLOCK(inp); 1754 continue; 1755 } 1756 /* 1757 * Ok this could be a likely candidate, look at all of its 1758 * addresses 1759 */ 1760 if (inp->sctp_lport != lport) { 1761 SCTP_INP_RUNLOCK(inp); 1762 continue; 1763 } 1764 /* does a VRF id match? */ 1765 fnd = 0; 1766 if (inp->def_vrf_id == vrf_id) 1767 fnd = 1; 1768 1769 if (!fnd) { 1770 SCTP_INP_RUNLOCK(inp); 1771 continue; 1772 } 1773 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1774 if (laddr->ifa == NULL) { 1775 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1776 __func__); 1777 continue; 1778 } 1779 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1780 (void *)laddr->ifa); 1781 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1783 continue; 1784 } 1785 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1786 /* possible, see if it matches */ 1787 switch (nam->sa_family) { 1788#ifdef INET 1789 case AF_INET: 1790 if (sin->sin_addr.s_addr == 1791 laddr->ifa->address.sin.sin_addr.s_addr) { 1792 SCTP_INP_RUNLOCK(inp); 1793 return (inp); 1794 } 1795 break; 1796#endif 1797#ifdef INET6 1798 case AF_INET6: 1799 intf_addr6 = &laddr->ifa->address.sin6; 1800 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1801 intf_addr6)) { 1802 SCTP_INP_RUNLOCK(inp); 1803 return (inp); 1804 } 1805 break; 1806#endif 1807 } 1808 } 1809 } 1810 SCTP_INP_RUNLOCK(inp); 1811 } 1812 return (NULL); 1813} 1814 1815 1816static struct sctp_inpcb * 1817sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1818{ 1819 struct sctppcbhead *head; 1820 struct sctp_inpcb *t_inp; 1821 int fnd; 1822 1823 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1824 SCTP_BASE_INFO(hashmark))]; 1825 LIST_FOREACH(t_inp, head, sctp_hash) { 1826 if (t_inp->sctp_lport != lport) { 1827 continue; 1828 } 1829 /* is it in the VRF in question */ 1830 fnd = 0; 1831 if (t_inp->def_vrf_id == vrf_id) 1832 fnd = 1; 1833 if (!fnd) 1834 continue; 1835 1836 /* This one is in use. */ 1837 /* check the v6/v4 binding issue */ 1838 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1839 SCTP_IPV6_V6ONLY(t_inp)) { 1840 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1841 /* collision in V6 space */ 1842 return (t_inp); 1843 } else { 1844 /* inp is BOUND_V4 no conflict */ 1845 continue; 1846 } 1847 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1848 /* t_inp is bound v4 and v6, conflict always */ 1849 return (t_inp); 1850 } else { 1851 /* t_inp is bound only V4 */ 1852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1853 SCTP_IPV6_V6ONLY(inp)) { 1854 /* no conflict */ 1855 continue; 1856 } 1857 /* else fall through to conflict */ 1858 } 1859 return (t_inp); 1860 } 1861 return (NULL); 1862} 1863 1864 1865int 1866sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1867{ 1868 /* For 1-2-1 with port reuse */ 1869 struct sctppcbhead *head; 1870 struct sctp_inpcb *tinp, *ninp; 1871 1872 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1873 /* only works with port reuse on */ 1874 return (-1); 1875 } 1876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1877 return (0); 1878 } 1879 SCTP_INP_RUNLOCK(inp); 1880 SCTP_INP_INFO_WLOCK(); 1881 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1882 SCTP_BASE_INFO(hashmark))]; 1883 /* Kick out all non-listeners to the TCP hash */ 1884 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1885 if (tinp->sctp_lport != inp->sctp_lport) { 1886 continue; 1887 } 1888 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1889 continue; 1890 } 1891 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1892 continue; 1893 } 1894 if (tinp->sctp_socket->so_qlimit) { 1895 continue; 1896 } 1897 SCTP_INP_WLOCK(tinp); 1898 LIST_REMOVE(tinp, sctp_hash); 1899 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1900 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1901 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1902 SCTP_INP_WUNLOCK(tinp); 1903 } 1904 SCTP_INP_WLOCK(inp); 1905 /* Pull from where he was */ 1906 LIST_REMOVE(inp, sctp_hash); 1907 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1908 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1909 LIST_INSERT_HEAD(head, inp, sctp_hash); 1910 SCTP_INP_WUNLOCK(inp); 1911 SCTP_INP_RLOCK(inp); 1912 SCTP_INP_INFO_WUNLOCK(); 1913 return (0); 1914} 1915 1916 1917struct sctp_inpcb * 1918sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1919 uint32_t vrf_id) 1920{ 1921 /* 1922 * First we check the hash table to see if someone has this port 1923 * bound with just the port. 1924 */ 1925 struct sctp_inpcb *inp; 1926 struct sctppcbhead *head; 1927 int lport; 1928 unsigned int i; 1929 1930#ifdef INET 1931 struct sockaddr_in *sin; 1932 1933#endif 1934#ifdef INET6 1935 struct sockaddr_in6 *sin6; 1936 1937#endif 1938 1939 switch (nam->sa_family) { 1940#ifdef INET 1941 case AF_INET: 1942 sin = (struct sockaddr_in *)nam; 1943 lport = sin->sin_port; 1944 break; 1945#endif 1946#ifdef INET6 1947 case AF_INET6: 1948 sin6 = (struct sockaddr_in6 *)nam; 1949 lport = sin6->sin6_port; 1950 break; 1951#endif 1952 default: 1953 return (NULL); 1954 } 1955 /* 1956 * I could cheat here and just cast to one of the types but we will 1957 * do it right. It also provides the check against an Unsupported 1958 * type too. 1959 */ 1960 /* Find the head of the ALLADDR chain */ 1961 if (have_lock == 0) { 1962 SCTP_INP_INFO_RLOCK(); 1963 } 1964 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1965 SCTP_BASE_INFO(hashmark))]; 1966 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1967 1968 /* 1969 * If the TCP model exists it could be that the main listening 1970 * endpoint is gone but there still exists a connected socket for 1971 * this guy. If so we can return the first one that we find. This 1972 * may NOT be the correct one so the caller should be wary on the 1973 * returned INP. Currently the only caller that sets find_tcp_pool 1974 * is in bindx where we are verifying that a user CAN bind the 1975 * address. He either has bound it already, or someone else has, or 1976 * its open to bind, so this is good enough. 1977 */ 1978 if (inp == NULL && find_tcp_pool) { 1979 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1980 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1981 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1982 if (inp) { 1983 break; 1984 } 1985 } 1986 } 1987 if (inp) { 1988 SCTP_INP_INCR_REF(inp); 1989 } 1990 if (have_lock == 0) { 1991 SCTP_INP_INFO_RUNLOCK(); 1992 } 1993 return (inp); 1994} 1995 1996 1997/* 1998 * Find an association for an endpoint with the pointer to whom you want to 1999 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2000 * need to change the *to to some other struct like a mbuf... 2001 */ 2002struct sctp_tcb * 2003sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2004 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2005 uint32_t vrf_id) 2006{ 2007 struct sctp_inpcb *inp = NULL; 2008 struct sctp_tcb *stcb; 2009 2010 SCTP_INP_INFO_RLOCK(); 2011 if (find_tcp_pool) { 2012 if (inp_p != NULL) { 2013 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2014 vrf_id); 2015 } else { 2016 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2017 vrf_id); 2018 } 2019 if (stcb != NULL) { 2020 SCTP_INP_INFO_RUNLOCK(); 2021 return (stcb); 2022 } 2023 } 2024 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2025 if (inp_p != NULL) { 2026 *inp_p = inp; 2027 } 2028 SCTP_INP_INFO_RUNLOCK(); 2029 if (inp == NULL) { 2030 return (NULL); 2031 } 2032 /* 2033 * ok, we have an endpoint, now lets find the assoc for it (if any) 2034 * we now place the source address or from in the to of the find 2035 * endpoint call. Since in reality this chain is used from the 2036 * inbound packet side. 2037 */ 2038 if (inp_p != NULL) { 2039 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2040 NULL); 2041 } else { 2042 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2043 NULL); 2044 } 2045 return (stcb); 2046} 2047 2048 2049/* 2050 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2051 * find all addresses that the sender has specified in any address list. Each 2052 * address will be used to lookup the TCB and see if one exits. 2053 */ 2054static struct sctp_tcb * 2055sctp_findassociation_special_addr(struct mbuf *m, int offset, 2056 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2057 struct sockaddr *dst) 2058{ 2059 struct sctp_paramhdr *phdr, parm_buf; 2060 2061#if defined(INET) || defined(INET6) 2062 struct sctp_tcb *stcb; 2063 uint16_t ptype; 2064 2065#endif 2066 uint16_t plen; 2067 2068#ifdef INET 2069 struct sockaddr_in sin4; 2070 2071#endif 2072#ifdef INET6 2073 struct sockaddr_in6 sin6; 2074 2075#endif 2076 2077#ifdef INET 2078 memset(&sin4, 0, sizeof(sin4)); 2079 sin4.sin_len = sizeof(sin4); 2080 sin4.sin_family = AF_INET; 2081 sin4.sin_port = sh->src_port; 2082#endif 2083#ifdef INET6 2084 memset(&sin6, 0, sizeof(sin6)); 2085 sin6.sin6_len = sizeof(sin6); 2086 sin6.sin6_family = AF_INET6; 2087 sin6.sin6_port = sh->src_port; 2088#endif 2089 2090 offset += sizeof(struct sctp_init_chunk); 2091 2092 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2093 while (phdr != NULL) { 2094 /* now we must see if we want the parameter */ 2095#if defined(INET) || defined(INET6) 2096 ptype = ntohs(phdr->param_type); 2097#endif 2098 plen = ntohs(phdr->param_length); 2099 if (plen == 0) { 2100 break; 2101 } 2102#ifdef INET 2103 if (ptype == SCTP_IPV4_ADDRESS && 2104 plen == sizeof(struct sctp_ipv4addr_param)) { 2105 /* Get the rest of the address */ 2106 struct sctp_ipv4addr_param ip4_parm, *p4; 2107 2108 phdr = sctp_get_next_param(m, offset, 2109 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2110 if (phdr == NULL) { 2111 return (NULL); 2112 } 2113 p4 = (struct sctp_ipv4addr_param *)phdr; 2114 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2115 /* look it up */ 2116 stcb = sctp_findassociation_ep_addr(inp_p, 2117 (struct sockaddr *)&sin4, netp, dst, NULL); 2118 if (stcb != NULL) { 2119 return (stcb); 2120 } 2121 } 2122#endif 2123#ifdef INET6 2124 if (ptype == SCTP_IPV6_ADDRESS && 2125 plen == sizeof(struct sctp_ipv6addr_param)) { 2126 /* Get the rest of the address */ 2127 struct sctp_ipv6addr_param ip6_parm, *p6; 2128 2129 phdr = sctp_get_next_param(m, offset, 2130 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2131 if (phdr == NULL) { 2132 return (NULL); 2133 } 2134 p6 = (struct sctp_ipv6addr_param *)phdr; 2135 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2136 /* look it up */ 2137 stcb = sctp_findassociation_ep_addr(inp_p, 2138 (struct sockaddr *)&sin6, netp, dst, NULL); 2139 if (stcb != NULL) { 2140 return (stcb); 2141 } 2142 } 2143#endif 2144 offset += SCTP_SIZE32(plen); 2145 phdr = sctp_get_next_param(m, offset, &parm_buf, 2146 sizeof(parm_buf)); 2147 } 2148 return (NULL); 2149} 2150 2151static struct sctp_tcb * 2152sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2153 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2154 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2155{ 2156 /* 2157 * Use my vtag to hash. If we find it we then verify the source addr 2158 * is in the assoc. If all goes well we save a bit on rec of a 2159 * packet. 2160 */ 2161 struct sctpasochead *head; 2162 struct sctp_nets *net; 2163 struct sctp_tcb *stcb; 2164 2165 SCTP_INP_INFO_RLOCK(); 2166 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2167 SCTP_BASE_INFO(hashasocmark))]; 2168 LIST_FOREACH(stcb, head, sctp_asocs) { 2169 SCTP_INP_RLOCK(stcb->sctp_ep); 2170 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2171 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2172 continue; 2173 } 2174 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2175 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2176 continue; 2177 } 2178 SCTP_TCB_LOCK(stcb); 2179 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2180 if (stcb->asoc.my_vtag == vtag) { 2181 /* candidate */ 2182 if (stcb->rport != rport) { 2183 SCTP_TCB_UNLOCK(stcb); 2184 continue; 2185 } 2186 if (stcb->sctp_ep->sctp_lport != lport) { 2187 SCTP_TCB_UNLOCK(stcb); 2188 continue; 2189 } 2190 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2191 SCTP_TCB_UNLOCK(stcb); 2192 continue; 2193 } 2194 /* RRS:Need toaddr check here */ 2195 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2196 /* Endpoint does not own this address */ 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 if (remote_tag) { 2201 /* 2202 * If we have both vtags that's all we match 2203 * on 2204 */ 2205 if (stcb->asoc.peer_vtag == remote_tag) { 2206 /* 2207 * If both tags match we consider it 2208 * conclusive and check NO 2209 * source/destination addresses 2210 */ 2211 goto conclusive; 2212 } 2213 } 2214 if (skip_src_check) { 2215 conclusive: 2216 if (from) { 2217 *netp = sctp_findnet(stcb, from); 2218 } else { 2219 *netp = NULL; /* unknown */ 2220 } 2221 if (inp_p) 2222 *inp_p = stcb->sctp_ep; 2223 SCTP_INP_INFO_RUNLOCK(); 2224 return (stcb); 2225 } 2226 net = sctp_findnet(stcb, from); 2227 if (net) { 2228 /* yep its him. */ 2229 *netp = net; 2230 SCTP_STAT_INCR(sctps_vtagexpress); 2231 *inp_p = stcb->sctp_ep; 2232 SCTP_INP_INFO_RUNLOCK(); 2233 return (stcb); 2234 } else { 2235 /* 2236 * not him, this should only happen in rare 2237 * cases so I peg it. 2238 */ 2239 SCTP_STAT_INCR(sctps_vtagbogus); 2240 } 2241 } 2242 SCTP_TCB_UNLOCK(stcb); 2243 } 2244 SCTP_INP_INFO_RUNLOCK(); 2245 return (NULL); 2246} 2247 2248 2249/* 2250 * Find an association with the pointer to the inbound IP packet. This can be 2251 * a IPv4 or IPv6 packet. 2252 */ 2253struct sctp_tcb * 2254sctp_findassociation_addr(struct mbuf *m, int offset, 2255 struct sockaddr *src, struct sockaddr *dst, 2256 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2257 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2258{ 2259 struct sctp_tcb *stcb; 2260 struct sctp_inpcb *inp; 2261 2262 if (sh->v_tag) { 2263 /* we only go down this path if vtag is non-zero */ 2264 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2265 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2266 if (stcb) { 2267 return (stcb); 2268 } 2269 } 2270 if (inp_p) { 2271 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2272 1, vrf_id); 2273 inp = *inp_p; 2274 } else { 2275 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2276 1, vrf_id); 2277 } 2278 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2279 if (stcb == NULL && inp) { 2280 /* Found a EP but not this address */ 2281 if ((ch->chunk_type == SCTP_INITIATION) || 2282 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2283 /*- 2284 * special hook, we do NOT return linp or an 2285 * association that is linked to an existing 2286 * association that is under the TCP pool (i.e. no 2287 * listener exists). The endpoint finding routine 2288 * will always find a listener before examining the 2289 * TCP pool. 2290 */ 2291 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2292 if (inp_p) { 2293 *inp_p = NULL; 2294 } 2295 return (NULL); 2296 } 2297 stcb = sctp_findassociation_special_addr(m, 2298 offset, sh, &inp, netp, dst); 2299 if (inp_p != NULL) { 2300 *inp_p = inp; 2301 } 2302 } 2303 } 2304 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2305 return (stcb); 2306} 2307 2308/* 2309 * lookup an association by an ASCONF lookup address. 2310 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2311 */ 2312struct sctp_tcb * 2313sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2314 struct sockaddr *dst, struct sctphdr *sh, 2315 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2316{ 2317 struct sctp_tcb *stcb; 2318 union sctp_sockstore remote_store; 2319 struct sctp_paramhdr parm_buf, *phdr; 2320 int ptype; 2321 int zero_address = 0; 2322 2323#ifdef INET 2324 struct sockaddr_in *sin; 2325 2326#endif 2327#ifdef INET6 2328 struct sockaddr_in6 *sin6; 2329 2330#endif 2331 2332 memset(&remote_store, 0, sizeof(remote_store)); 2333 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2334 &parm_buf, sizeof(struct sctp_paramhdr)); 2335 if (phdr == NULL) { 2336 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2337 __func__); 2338 return NULL; 2339 } 2340 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2341 /* get the correlation address */ 2342 switch (ptype) { 2343#ifdef INET6 2344 case SCTP_IPV6_ADDRESS: 2345 { 2346 /* ipv6 address param */ 2347 struct sctp_ipv6addr_param *p6, p6_buf; 2348 2349 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2350 return NULL; 2351 } 2352 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2353 offset + sizeof(struct sctp_asconf_chunk), 2354 &p6_buf.ph, sizeof(*p6)); 2355 if (p6 == NULL) { 2356 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2357 __func__); 2358 return (NULL); 2359 } 2360 sin6 = &remote_store.sin6; 2361 sin6->sin6_family = AF_INET6; 2362 sin6->sin6_len = sizeof(*sin6); 2363 sin6->sin6_port = sh->src_port; 2364 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2365 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2366 zero_address = 1; 2367 break; 2368 } 2369#endif 2370#ifdef INET 2371 case SCTP_IPV4_ADDRESS: 2372 { 2373 /* ipv4 address param */ 2374 struct sctp_ipv4addr_param *p4, p4_buf; 2375 2376 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2377 return NULL; 2378 } 2379 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2380 offset + sizeof(struct sctp_asconf_chunk), 2381 &p4_buf.ph, sizeof(*p4)); 2382 if (p4 == NULL) { 2383 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2384 __func__); 2385 return (NULL); 2386 } 2387 sin = &remote_store.sin; 2388 sin->sin_family = AF_INET; 2389 sin->sin_len = sizeof(*sin); 2390 sin->sin_port = sh->src_port; 2391 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2392 if (sin->sin_addr.s_addr == INADDR_ANY) 2393 zero_address = 1; 2394 break; 2395 } 2396#endif 2397 default: 2398 /* invalid address param type */ 2399 return NULL; 2400 } 2401 2402 if (zero_address) { 2403 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2404 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2405 if (stcb != NULL) { 2406 SCTP_INP_DECR_REF(*inp_p); 2407 } 2408 } else { 2409 stcb = sctp_findassociation_ep_addr(inp_p, 2410 &remote_store.sa, netp, 2411 dst, NULL); 2412 } 2413 return (stcb); 2414} 2415 2416 2417/* 2418 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2419 * addresses. This way if we don't get a bind we by default pick a ephemeral 2420 * port with all addresses bound. 2421 */ 2422int 2423sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2424{ 2425 /* 2426 * we get called when a new endpoint starts up. We need to allocate 2427 * the sctp_inpcb structure from the zone and init it. Mark it as 2428 * unbound and find a port that we can use as an ephemeral with 2429 * INADDR_ANY. If the user binds later no problem we can then add in 2430 * the specific addresses. And setup the default parameters for the 2431 * EP. 2432 */ 2433 int i, error; 2434 struct sctp_inpcb *inp; 2435 struct sctp_pcb *m; 2436 struct timeval time; 2437 sctp_sharedkey_t *null_key; 2438 2439 error = 0; 2440 2441 SCTP_INP_INFO_WLOCK(); 2442 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2443 if (inp == NULL) { 2444 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2445 SCTP_INP_INFO_WUNLOCK(); 2446 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2447 return (ENOBUFS); 2448 } 2449 /* zap it */ 2450 bzero(inp, sizeof(*inp)); 2451 2452 /* bump generations */ 2453 /* setup socket pointers */ 2454 inp->sctp_socket = so; 2455 inp->ip_inp.inp.inp_socket = so; 2456 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2457#ifdef INET6 2458 if (INP_SOCKAF(so) == AF_INET6) { 2459 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2460 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2461 } 2462 if (MODULE_GLOBAL(ip6_v6only)) { 2463 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2464 } 2465 } 2466#endif 2467 inp->sctp_associd_counter = 1; 2468 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2469 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2470 inp->max_cwnd = 0; 2471 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2472 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2473 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2474 inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable); 2475 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2476 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2477 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2478 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2479 inp->idata_supported = 0; 2480 2481 inp->fibnum = so->so_fibnum; 2482 /* init the small hash table we use to track asocid <-> tcb */ 2483 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2484 if (inp->sctp_asocidhash == NULL) { 2485 crfree(inp->ip_inp.inp.inp_cred); 2486 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2487 SCTP_INP_INFO_WUNLOCK(); 2488 return (ENOBUFS); 2489 } 2490#ifdef IPSEC 2491 error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp); 2492 if (error != 0) { 2493 crfree(inp->ip_inp.inp.inp_cred); 2494 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2495 SCTP_INP_INFO_WUNLOCK(); 2496 return error; 2497 } 2498#endif /* IPSEC */ 2499 SCTP_INCR_EP_COUNT(); 2500 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2501 SCTP_INP_INFO_WUNLOCK(); 2502 2503 so->so_pcb = (caddr_t)inp; 2504 2505 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2506 /* UDP style socket */ 2507 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2508 SCTP_PCB_FLAGS_UNBOUND); 2509 /* Be sure it is NON-BLOCKING IO for UDP */ 2510 /* SCTP_SET_SO_NBIO(so); */ 2511 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2512 /* TCP style socket */ 2513 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2514 SCTP_PCB_FLAGS_UNBOUND); 2515 /* Be sure we have blocking IO by default */ 2516 SCTP_CLEAR_SO_NBIO(so); 2517 } else { 2518 /* 2519 * unsupported socket type (RAW, etc)- in case we missed it 2520 * in protosw 2521 */ 2522 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2523 so->so_pcb = NULL; 2524 crfree(inp->ip_inp.inp.inp_cred); 2525#ifdef IPSEC 2526 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2527#endif 2528 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2529 return (EOPNOTSUPP); 2530 } 2531 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2532 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2533 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2534 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2535 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2536 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2537 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2538 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2539 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2540 } 2541 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2542 &inp->sctp_hashmark); 2543 if (inp->sctp_tcbhash == NULL) { 2544 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2545 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2546 so->so_pcb = NULL; 2547 crfree(inp->ip_inp.inp.inp_cred); 2548#ifdef IPSEC 2549 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2550#endif 2551 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2552 return (ENOBUFS); 2553 } 2554 inp->def_vrf_id = vrf_id; 2555 2556 SCTP_INP_INFO_WLOCK(); 2557 SCTP_INP_LOCK_INIT(inp); 2558 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2559 SCTP_INP_READ_INIT(inp); 2560 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2561 /* lock the new ep */ 2562 SCTP_INP_WLOCK(inp); 2563 2564 /* add it to the info area */ 2565 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2566 SCTP_INP_INFO_WUNLOCK(); 2567 2568 TAILQ_INIT(&inp->read_queue); 2569 LIST_INIT(&inp->sctp_addr_list); 2570 2571 LIST_INIT(&inp->sctp_asoc_list); 2572 2573#ifdef SCTP_TRACK_FREED_ASOCS 2574 /* TEMP CODE */ 2575 LIST_INIT(&inp->sctp_asoc_free_list); 2576#endif 2577 /* Init the timer structure for signature change */ 2578 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2579 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2580 2581 /* now init the actual endpoint default data */ 2582 m = &inp->sctp_ep; 2583 2584 /* setup the base timeout information */ 2585 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2586 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2587 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2588 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2589 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2590 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2591 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2592 /* all max/min max are in ms */ 2593 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2594 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2595 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2596 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2597 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2598 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2599 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2600 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2601 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2602 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2603 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2604 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2605 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2606 2607 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2608 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2609 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2610 /* number of streams to pre-open on a association */ 2611 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2612 2613 /* Add adaptation cookie */ 2614 m->adaptation_layer_indicator = 0; 2615 m->adaptation_layer_indicator_provided = 0; 2616 2617 /* seed random number generator */ 2618 m->random_counter = 1; 2619 m->store_at = SCTP_SIGNATURE_SIZE; 2620 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2621 sctp_fill_random_store(m); 2622 2623 /* Minimum cookie size */ 2624 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2625 sizeof(struct sctp_state_cookie); 2626 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2627 2628 /* Setup the initial secret */ 2629 (void)SCTP_GETTIME_TIMEVAL(&time); 2630 m->time_of_secret_change = time.tv_sec; 2631 2632 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2633 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2634 } 2635 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2636 2637 /* How long is a cookie good for ? */ 2638 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2639 /* 2640 * Initialize authentication parameters 2641 */ 2642 m->local_hmacs = sctp_default_supported_hmaclist(); 2643 m->local_auth_chunks = sctp_alloc_chunklist(); 2644 if (inp->asconf_supported) { 2645 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2646 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2647 } 2648 m->default_dscp = 0; 2649#ifdef INET6 2650 m->default_flowlabel = 0; 2651#endif 2652 m->port = 0; /* encapsulation disabled by default */ 2653 LIST_INIT(&m->shared_keys); 2654 /* add default NULL key as key id 0 */ 2655 null_key = sctp_alloc_sharedkey(); 2656 sctp_insert_sharedkey(&m->shared_keys, null_key); 2657 SCTP_INP_WUNLOCK(inp); 2658#ifdef SCTP_LOG_CLOSING 2659 sctp_log_closing(inp, NULL, 12); 2660#endif 2661 return (error); 2662} 2663 2664 2665void 2666sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2667 struct sctp_tcb *stcb) 2668{ 2669 struct sctp_nets *net; 2670 uint16_t lport, rport; 2671 struct sctppcbhead *head; 2672 struct sctp_laddr *laddr, *oladdr; 2673 2674 atomic_add_int(&stcb->asoc.refcnt, 1); 2675 SCTP_TCB_UNLOCK(stcb); 2676 SCTP_INP_INFO_WLOCK(); 2677 SCTP_INP_WLOCK(old_inp); 2678 SCTP_INP_WLOCK(new_inp); 2679 SCTP_TCB_LOCK(stcb); 2680 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2681 2682 new_inp->sctp_ep.time_of_secret_change = 2683 old_inp->sctp_ep.time_of_secret_change; 2684 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2685 sizeof(old_inp->sctp_ep.secret_key)); 2686 new_inp->sctp_ep.current_secret_number = 2687 old_inp->sctp_ep.current_secret_number; 2688 new_inp->sctp_ep.last_secret_number = 2689 old_inp->sctp_ep.last_secret_number; 2690 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2691 2692 /* make it so new data pours into the new socket */ 2693 stcb->sctp_socket = new_inp->sctp_socket; 2694 stcb->sctp_ep = new_inp; 2695 2696 /* Copy the port across */ 2697 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2698 rport = stcb->rport; 2699 /* Pull the tcb from the old association */ 2700 LIST_REMOVE(stcb, sctp_tcbhash); 2701 LIST_REMOVE(stcb, sctp_tcblist); 2702 if (stcb->asoc.in_asocid_hash) { 2703 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2704 } 2705 /* Now insert the new_inp into the TCP connected hash */ 2706 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2707 2708 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2709 /* Its safe to access */ 2710 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2711 2712 /* Now move the tcb into the endpoint list */ 2713 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2714 /* 2715 * Question, do we even need to worry about the ep-hash since we 2716 * only have one connection? Probably not :> so lets get rid of it 2717 * and not suck up any kernel memory in that. 2718 */ 2719 if (stcb->asoc.in_asocid_hash) { 2720 struct sctpasochead *lhd; 2721 2722 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2723 new_inp->hashasocidmark)]; 2724 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2725 } 2726 /* Ok. Let's restart timer. */ 2727 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2728 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2729 stcb, net); 2730 } 2731 2732 SCTP_INP_INFO_WUNLOCK(); 2733 if (new_inp->sctp_tcbhash != NULL) { 2734 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2735 new_inp->sctp_tcbhash = NULL; 2736 } 2737 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2738 /* Subset bound, so copy in the laddr list from the old_inp */ 2739 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2740 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2741 if (laddr == NULL) { 2742 /* 2743 * Gak, what can we do? This assoc is really 2744 * HOSED. We probably should send an abort 2745 * here. 2746 */ 2747 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2748 continue; 2749 } 2750 SCTP_INCR_LADDR_COUNT(); 2751 bzero(laddr, sizeof(*laddr)); 2752 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2753 laddr->ifa = oladdr->ifa; 2754 atomic_add_int(&laddr->ifa->refcount, 1); 2755 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2756 sctp_nxt_addr); 2757 new_inp->laddr_count++; 2758 if (oladdr == stcb->asoc.last_used_address) { 2759 stcb->asoc.last_used_address = laddr; 2760 } 2761 } 2762 } 2763 /* 2764 * Now any running timers need to be adjusted since we really don't 2765 * care if they are running or not just blast in the new_inp into 2766 * all of them. 2767 */ 2768 2769 stcb->asoc.dack_timer.ep = (void *)new_inp; 2770 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2771 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2772 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2773 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2774 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2775 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2776 /* now what about the nets? */ 2777 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2778 net->pmtu_timer.ep = (void *)new_inp; 2779 net->hb_timer.ep = (void *)new_inp; 2780 net->rxt_timer.ep = (void *)new_inp; 2781 } 2782 SCTP_INP_WUNLOCK(new_inp); 2783 SCTP_INP_WUNLOCK(old_inp); 2784} 2785 2786/* 2787 * insert an laddr entry with the given ifa for the desired list 2788 */ 2789static int 2790sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2791{ 2792 struct sctp_laddr *laddr; 2793 2794 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2795 if (laddr == NULL) { 2796 /* out of memory? */ 2797 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2798 return (EINVAL); 2799 } 2800 SCTP_INCR_LADDR_COUNT(); 2801 bzero(laddr, sizeof(*laddr)); 2802 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2803 laddr->ifa = ifa; 2804 laddr->action = act; 2805 atomic_add_int(&ifa->refcount, 1); 2806 /* insert it */ 2807 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2808 2809 return (0); 2810} 2811 2812/* 2813 * Remove an laddr entry from the local address list (on an assoc) 2814 */ 2815static void 2816sctp_remove_laddr(struct sctp_laddr *laddr) 2817{ 2818 2819 /* remove from the list */ 2820 LIST_REMOVE(laddr, sctp_nxt_addr); 2821 sctp_free_ifa(laddr->ifa); 2822 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2823 SCTP_DECR_LADDR_COUNT(); 2824} 2825 2826 2827 2828/* sctp_ifap is used to bypass normal local address validation checks */ 2829int 2830sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2831 struct sctp_ifa *sctp_ifap, struct thread *p) 2832{ 2833 /* bind a ep to a socket address */ 2834 struct sctppcbhead *head; 2835 struct sctp_inpcb *inp, *inp_tmp; 2836 struct inpcb *ip_inp; 2837 int port_reuse_active = 0; 2838 int bindall; 2839 uint16_t lport; 2840 int error; 2841 uint32_t vrf_id; 2842 2843 lport = 0; 2844 bindall = 1; 2845 inp = (struct sctp_inpcb *)so->so_pcb; 2846 ip_inp = (struct inpcb *)so->so_pcb; 2847#ifdef SCTP_DEBUG 2848 if (addr) { 2849 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2850 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2851 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2852 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2853 } 2854#endif 2855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2856 /* already did a bind, subsequent binds NOT allowed ! */ 2857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2858 return (EINVAL); 2859 } 2860#ifdef INVARIANTS 2861 if (p == NULL) 2862 panic("null proc/thread"); 2863#endif 2864 if (addr != NULL) { 2865 switch (addr->sa_family) { 2866#ifdef INET 2867 case AF_INET: 2868 { 2869 struct sockaddr_in *sin; 2870 2871 /* IPV6_V6ONLY socket? */ 2872 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2873 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2874 return (EINVAL); 2875 } 2876 if (addr->sa_len != sizeof(*sin)) { 2877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2878 return (EINVAL); 2879 } 2880 sin = (struct sockaddr_in *)addr; 2881 lport = sin->sin_port; 2882 /* 2883 * For LOOPBACK the prison_local_ip4() call 2884 * will transmute the ip address to the 2885 * proper value. 2886 */ 2887 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2888 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2889 return (error); 2890 } 2891 if (sin->sin_addr.s_addr != INADDR_ANY) { 2892 bindall = 0; 2893 } 2894 break; 2895 } 2896#endif 2897#ifdef INET6 2898 case AF_INET6: 2899 { 2900 /* 2901 * Only for pure IPv6 Address. (No IPv4 2902 * Mapped!) 2903 */ 2904 struct sockaddr_in6 *sin6; 2905 2906 sin6 = (struct sockaddr_in6 *)addr; 2907 2908 if (addr->sa_len != sizeof(*sin6)) { 2909 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2910 return (EINVAL); 2911 } 2912 lport = sin6->sin6_port; 2913 /* 2914 * For LOOPBACK the prison_local_ip6() call 2915 * will transmute the ipv6 address to the 2916 * proper value. 2917 */ 2918 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2919 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2920 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2921 return (error); 2922 } 2923 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2924 bindall = 0; 2925 /* KAME hack: embed scopeid */ 2926 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2927 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2928 return (EINVAL); 2929 } 2930 } 2931 /* this must be cleared for ifa_ifwithaddr() */ 2932 sin6->sin6_scope_id = 0; 2933 break; 2934 } 2935#endif 2936 default: 2937 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2938 return (EAFNOSUPPORT); 2939 } 2940 } 2941 SCTP_INP_INFO_WLOCK(); 2942 SCTP_INP_WLOCK(inp); 2943 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2944 vrf_id = inp->def_vrf_id; 2945 2946 /* increase our count due to the unlock we do */ 2947 SCTP_INP_INCR_REF(inp); 2948 if (lport) { 2949 /* 2950 * Did the caller specify a port? if so we must see if an ep 2951 * already has this one bound. 2952 */ 2953 /* got to be root to get at low ports */ 2954 if (ntohs(lport) < IPPORT_RESERVED) { 2955 if (p && (error = 2956 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2957 )) { 2958 SCTP_INP_DECR_REF(inp); 2959 SCTP_INP_WUNLOCK(inp); 2960 SCTP_INP_INFO_WUNLOCK(); 2961 return (error); 2962 } 2963 } 2964 SCTP_INP_WUNLOCK(inp); 2965 if (bindall) { 2966 vrf_id = inp->def_vrf_id; 2967 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2968 if (inp_tmp != NULL) { 2969 /* 2970 * lock guy returned and lower count note 2971 * that we are not bound so inp_tmp should 2972 * NEVER be inp. And it is this inp 2973 * (inp_tmp) that gets the reference bump, 2974 * so we must lower it. 2975 */ 2976 SCTP_INP_DECR_REF(inp_tmp); 2977 /* unlock info */ 2978 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2979 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2980 /* 2981 * Ok, must be one-2-one and 2982 * allowing port re-use 2983 */ 2984 port_reuse_active = 1; 2985 goto continue_anyway; 2986 } 2987 SCTP_INP_DECR_REF(inp); 2988 SCTP_INP_INFO_WUNLOCK(); 2989 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2990 return (EADDRINUSE); 2991 } 2992 } else { 2993 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2994 if (inp_tmp != NULL) { 2995 /* 2996 * lock guy returned and lower count note 2997 * that we are not bound so inp_tmp should 2998 * NEVER be inp. And it is this inp 2999 * (inp_tmp) that gets the reference bump, 3000 * so we must lower it. 3001 */ 3002 SCTP_INP_DECR_REF(inp_tmp); 3003 /* unlock info */ 3004 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3005 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3006 /* 3007 * Ok, must be one-2-one and 3008 * allowing port re-use 3009 */ 3010 port_reuse_active = 1; 3011 goto continue_anyway; 3012 } 3013 SCTP_INP_DECR_REF(inp); 3014 SCTP_INP_INFO_WUNLOCK(); 3015 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3016 return (EADDRINUSE); 3017 } 3018 } 3019continue_anyway: 3020 SCTP_INP_WLOCK(inp); 3021 if (bindall) { 3022 /* verify that no lport is not used by a singleton */ 3023 if ((port_reuse_active == 0) && 3024 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3025 /* Sorry someone already has this one bound */ 3026 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3027 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3028 port_reuse_active = 1; 3029 } else { 3030 SCTP_INP_DECR_REF(inp); 3031 SCTP_INP_WUNLOCK(inp); 3032 SCTP_INP_INFO_WUNLOCK(); 3033 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3034 return (EADDRINUSE); 3035 } 3036 } 3037 } 3038 } else { 3039 uint16_t first, last, candidate; 3040 uint16_t count; 3041 int done; 3042 3043 if (ip_inp->inp_flags & INP_HIGHPORT) { 3044 first = MODULE_GLOBAL(ipport_hifirstauto); 3045 last = MODULE_GLOBAL(ipport_hilastauto); 3046 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3047 if (p && (error = 3048 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3049 )) { 3050 SCTP_INP_DECR_REF(inp); 3051 SCTP_INP_WUNLOCK(inp); 3052 SCTP_INP_INFO_WUNLOCK(); 3053 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3054 return (error); 3055 } 3056 first = MODULE_GLOBAL(ipport_lowfirstauto); 3057 last = MODULE_GLOBAL(ipport_lowlastauto); 3058 } else { 3059 first = MODULE_GLOBAL(ipport_firstauto); 3060 last = MODULE_GLOBAL(ipport_lastauto); 3061 } 3062 if (first > last) { 3063 uint16_t temp; 3064 3065 temp = first; 3066 first = last; 3067 last = temp; 3068 } 3069 count = last - first + 1; /* number of candidates */ 3070 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3071 3072 done = 0; 3073 while (!done) { 3074 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3075 done = 1; 3076 } 3077 if (!done) { 3078 if (--count == 0) { 3079 SCTP_INP_DECR_REF(inp); 3080 SCTP_INP_WUNLOCK(inp); 3081 SCTP_INP_INFO_WUNLOCK(); 3082 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3083 return (EADDRINUSE); 3084 } 3085 if (candidate == last) 3086 candidate = first; 3087 else 3088 candidate = candidate + 1; 3089 } 3090 } 3091 lport = htons(candidate); 3092 } 3093 SCTP_INP_DECR_REF(inp); 3094 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3095 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3096 /* 3097 * this really should not happen. The guy did a non-blocking 3098 * bind and then did a close at the same time. 3099 */ 3100 SCTP_INP_WUNLOCK(inp); 3101 SCTP_INP_INFO_WUNLOCK(); 3102 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3103 return (EINVAL); 3104 } 3105 /* ok we look clear to give out this port, so lets setup the binding */ 3106 if (bindall) { 3107 /* binding to all addresses, so just set in the proper flags */ 3108 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3109 /* set the automatic addr changes from kernel flag */ 3110 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3111 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3112 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3113 } else { 3114 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3115 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3116 } 3117 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3118 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3119 } else { 3120 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3121 } 3122 /* 3123 * set the automatic mobility_base from kernel flag (by 3124 * micchie) 3125 */ 3126 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3127 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3128 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3129 } else { 3130 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3131 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3132 } 3133 /* 3134 * set the automatic mobility_fasthandoff from kernel flag 3135 * (by micchie) 3136 */ 3137 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3138 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3139 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3140 } else { 3141 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3142 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3143 } 3144 } else { 3145 /* 3146 * bind specific, make sure flags is off and add a new 3147 * address structure to the sctp_addr_list inside the ep 3148 * structure. 3149 * 3150 * We will need to allocate one and insert it at the head. The 3151 * socketopt call can just insert new addresses in there as 3152 * well. It will also have to do the embed scope kame hack 3153 * too (before adding). 3154 */ 3155 struct sctp_ifa *ifa; 3156 union sctp_sockstore store; 3157 3158 memset(&store, 0, sizeof(store)); 3159 switch (addr->sa_family) { 3160#ifdef INET 3161 case AF_INET: 3162 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3163 store.sin.sin_port = 0; 3164 break; 3165#endif 3166#ifdef INET6 3167 case AF_INET6: 3168 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3169 store.sin6.sin6_port = 0; 3170 break; 3171#endif 3172 default: 3173 break; 3174 } 3175 /* 3176 * first find the interface with the bound address need to 3177 * zero out the port to find the address! yuck! can't do 3178 * this earlier since need port for sctp_pcb_findep() 3179 */ 3180 if (sctp_ifap != NULL) { 3181 ifa = sctp_ifap; 3182 } else { 3183 /* 3184 * Note for BSD we hit here always other O/S's will 3185 * pass things in via the sctp_ifap argument 3186 * (Panda). 3187 */ 3188 ifa = sctp_find_ifa_by_addr(&store.sa, 3189 vrf_id, SCTP_ADDR_NOT_LOCKED); 3190 } 3191 if (ifa == NULL) { 3192 /* Can't find an interface with that address */ 3193 SCTP_INP_WUNLOCK(inp); 3194 SCTP_INP_INFO_WUNLOCK(); 3195 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3196 return (EADDRNOTAVAIL); 3197 } 3198#ifdef INET6 3199 if (addr->sa_family == AF_INET6) { 3200 /* GAK, more FIXME IFA lock? */ 3201 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3202 /* Can't bind a non-existent addr. */ 3203 SCTP_INP_WUNLOCK(inp); 3204 SCTP_INP_INFO_WUNLOCK(); 3205 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3206 return (EINVAL); 3207 } 3208 } 3209#endif 3210 /* we're not bound all */ 3211 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3212 /* allow bindx() to send ASCONF's for binding changes */ 3213 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3214 /* clear automatic addr changes from kernel flag */ 3215 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3216 3217 /* add this address to the endpoint list */ 3218 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3219 if (error != 0) { 3220 SCTP_INP_WUNLOCK(inp); 3221 SCTP_INP_INFO_WUNLOCK(); 3222 return (error); 3223 } 3224 inp->laddr_count++; 3225 } 3226 /* find the bucket */ 3227 if (port_reuse_active) { 3228 /* Put it into tcp 1-2-1 hash */ 3229 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3230 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3231 } else { 3232 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3233 } 3234 /* put it in the bucket */ 3235 LIST_INSERT_HEAD(head, inp, sctp_hash); 3236 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3237 (void *)head, ntohs(lport), port_reuse_active); 3238 /* set in the port */ 3239 inp->sctp_lport = lport; 3240 3241 /* turn off just the unbound flag */ 3242 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3243 SCTP_INP_WUNLOCK(inp); 3244 SCTP_INP_INFO_WUNLOCK(); 3245 return (0); 3246} 3247 3248 3249static void 3250sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3251{ 3252 struct sctp_iterator *it, *nit; 3253 3254 /* 3255 * We enter with the only the ITERATOR_LOCK in place and a write 3256 * lock on the inp_info stuff. 3257 */ 3258 it = sctp_it_ctl.cur_it; 3259 if (it && (it->vn != curvnet)) { 3260 /* Its not looking at our VNET */ 3261 return; 3262 } 3263 if (it && (it->inp == inp)) { 3264 /* 3265 * This is tricky and we hold the iterator lock, but when it 3266 * returns and gets the lock (when we release it) the 3267 * iterator will try to operate on inp. We need to stop that 3268 * from happening. But of course the iterator has a 3269 * reference on the stcb and inp. We can mark it and it will 3270 * stop. 3271 * 3272 * If its a single iterator situation, we set the end iterator 3273 * flag. Otherwise we set the iterator to go to the next 3274 * inp. 3275 * 3276 */ 3277 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3278 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3279 } else { 3280 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3281 } 3282 } 3283 /* 3284 * Now go through and remove any single reference to our inp that 3285 * may be still pending on the list 3286 */ 3287 SCTP_IPI_ITERATOR_WQ_LOCK(); 3288 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3289 if (it->vn != curvnet) { 3290 continue; 3291 } 3292 if (it->inp == inp) { 3293 /* This one points to me is it inp specific? */ 3294 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3295 /* Remove and free this one */ 3296 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3297 it, sctp_nxt_itr); 3298 if (it->function_atend != NULL) { 3299 (*it->function_atend) (it->pointer, it->val); 3300 } 3301 SCTP_FREE(it, SCTP_M_ITER); 3302 } else { 3303 it->inp = LIST_NEXT(it->inp, sctp_list); 3304 if (it->inp) { 3305 SCTP_INP_INCR_REF(it->inp); 3306 } 3307 } 3308 /* 3309 * When its put in the refcnt is incremented so decr 3310 * it 3311 */ 3312 SCTP_INP_DECR_REF(inp); 3313 } 3314 } 3315 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3316} 3317 3318/* release sctp_inpcb unbind the port */ 3319void 3320sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3321{ 3322 /* 3323 * Here we free a endpoint. We must find it (if it is in the Hash 3324 * table) and remove it from there. Then we must also find it in the 3325 * overall list and remove it from there. After all removals are 3326 * complete then any timer has to be stopped. Then start the actual 3327 * freeing. a) Any local lists. b) Any associations. c) The hash of 3328 * all associations. d) finally the ep itself. 3329 */ 3330 struct sctp_tcb *asoc, *nasoc; 3331 struct sctp_laddr *laddr, *nladdr; 3332 struct inpcb *ip_pcb; 3333 struct socket *so; 3334 int being_refed = 0; 3335 struct sctp_queued_to_read *sq, *nsq; 3336 int cnt; 3337 sctp_sharedkey_t *shared_key, *nshared_key; 3338 3339 3340#ifdef SCTP_LOG_CLOSING 3341 sctp_log_closing(inp, NULL, 0); 3342#endif 3343 SCTP_ITERATOR_LOCK(); 3344 /* mark any iterators on the list or being processed */ 3345 sctp_iterator_inp_being_freed(inp); 3346 SCTP_ITERATOR_UNLOCK(); 3347 so = inp->sctp_socket; 3348 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3349 /* been here before.. eeks.. get out of here */ 3350 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3351#ifdef SCTP_LOG_CLOSING 3352 sctp_log_closing(inp, NULL, 1); 3353#endif 3354 return; 3355 } 3356 SCTP_ASOC_CREATE_LOCK(inp); 3357 SCTP_INP_INFO_WLOCK(); 3358 3359 SCTP_INP_WLOCK(inp); 3360 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3361 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3362 /* socket is gone, so no more wakeups allowed */ 3363 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3364 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3365 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3366 3367 } 3368 /* First time through we have the socket lock, after that no more. */ 3369 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3370 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3371 3372 if (inp->control) { 3373 sctp_m_freem(inp->control); 3374 inp->control = NULL; 3375 } 3376 if (inp->pkt) { 3377 sctp_m_freem(inp->pkt); 3378 inp->pkt = NULL; 3379 } 3380 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3381 * here but I will be nice :> (i.e. 3382 * ip_pcb = ep;) */ 3383 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3384 int cnt_in_sd; 3385 3386 cnt_in_sd = 0; 3387 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3388 SCTP_TCB_LOCK(asoc); 3389 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3390 /* Skip guys being freed */ 3391 cnt_in_sd++; 3392 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3393 /* 3394 * Special case - we did not start a 3395 * kill timer on the asoc due to it 3396 * was not closed. So go ahead and 3397 * start it now. 3398 */ 3399 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3400 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3401 } 3402 SCTP_TCB_UNLOCK(asoc); 3403 continue; 3404 } 3405 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3406 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3407 (asoc->asoc.total_output_queue_size == 0)) { 3408 /* 3409 * If we have data in queue, we don't want 3410 * to just free since the app may have done, 3411 * send()/close or connect/send/close. And 3412 * it wants the data to get across first. 3413 */ 3414 /* Just abandon things in the front states */ 3415 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3416 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3417 cnt_in_sd++; 3418 } 3419 continue; 3420 } 3421 /* Disconnect the socket please */ 3422 asoc->sctp_socket = NULL; 3423 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3424 if ((asoc->asoc.size_on_reasm_queue > 0) || 3425 (asoc->asoc.control_pdapi) || 3426 (asoc->asoc.size_on_all_streams > 0) || 3427 (so && (so->so_rcv.sb_cc > 0))) { 3428 /* Left with Data unread */ 3429 struct mbuf *op_err; 3430 3431 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3432 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3433 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3434 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3435 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3436 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3437 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3438 } 3439 if (sctp_free_assoc(inp, asoc, 3440 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3441 cnt_in_sd++; 3442 } 3443 continue; 3444 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3445 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3446 (asoc->asoc.stream_queue_cnt == 0)) { 3447 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3448 goto abort_anyway; 3449 } 3450 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3451 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3452 struct sctp_nets *netp; 3453 3454 /* 3455 * there is nothing queued to send, 3456 * so I send shutdown 3457 */ 3458 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3459 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3460 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3461 } 3462 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3463 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3464 sctp_stop_timers_for_shutdown(asoc); 3465 if (asoc->asoc.alternate) { 3466 netp = asoc->asoc.alternate; 3467 } else { 3468 netp = asoc->asoc.primary_destination; 3469 } 3470 sctp_send_shutdown(asoc, netp); 3471 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3472 netp); 3473 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3474 asoc->asoc.primary_destination); 3475 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3476 } 3477 } else { 3478 /* mark into shutdown pending */ 3479 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3480 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3481 asoc->asoc.primary_destination); 3482 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3483 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3484 } 3485 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3486 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3487 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3488 struct mbuf *op_err; 3489 3490 abort_anyway: 3491 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3492 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3493 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3494 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3495 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3496 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3497 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3498 } 3499 if (sctp_free_assoc(inp, asoc, 3500 SCTP_PCBFREE_NOFORCE, 3501 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3502 cnt_in_sd++; 3503 } 3504 continue; 3505 } else { 3506 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3507 } 3508 } 3509 cnt_in_sd++; 3510 SCTP_TCB_UNLOCK(asoc); 3511 } 3512 /* now is there some left in our SHUTDOWN state? */ 3513 if (cnt_in_sd) { 3514#ifdef SCTP_LOG_CLOSING 3515 sctp_log_closing(inp, NULL, 2); 3516#endif 3517 inp->sctp_socket = NULL; 3518 SCTP_INP_WUNLOCK(inp); 3519 SCTP_ASOC_CREATE_UNLOCK(inp); 3520 SCTP_INP_INFO_WUNLOCK(); 3521 return; 3522 } 3523 } 3524 inp->sctp_socket = NULL; 3525 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3526 SCTP_PCB_FLAGS_UNBOUND) { 3527 /* 3528 * ok, this guy has been bound. It's port is somewhere in 3529 * the SCTP_BASE_INFO(hash table). Remove it! 3530 */ 3531 LIST_REMOVE(inp, sctp_hash); 3532 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3533 } 3534 /* 3535 * If there is a timer running to kill us, forget it, since it may 3536 * have a contest on the INP lock.. which would cause us to die ... 3537 */ 3538 cnt = 0; 3539 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3540 SCTP_TCB_LOCK(asoc); 3541 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3542 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3543 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3544 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3545 } 3546 cnt++; 3547 SCTP_TCB_UNLOCK(asoc); 3548 continue; 3549 } 3550 /* Free associations that are NOT killing us */ 3551 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3552 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3553 struct mbuf *op_err; 3554 3555 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3556 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3557 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3558 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3559 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3560 cnt++; 3561 SCTP_TCB_UNLOCK(asoc); 3562 continue; 3563 } 3564 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3565 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3566 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3567 } 3568 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3569 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3570 cnt++; 3571 } 3572 } 3573 if (cnt) { 3574 /* Ok we have someone out there that will kill us */ 3575 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3576#ifdef SCTP_LOG_CLOSING 3577 sctp_log_closing(inp, NULL, 3); 3578#endif 3579 SCTP_INP_WUNLOCK(inp); 3580 SCTP_ASOC_CREATE_UNLOCK(inp); 3581 SCTP_INP_INFO_WUNLOCK(); 3582 return; 3583 } 3584 if (SCTP_INP_LOCK_CONTENDED(inp)) 3585 being_refed++; 3586 if (SCTP_INP_READ_CONTENDED(inp)) 3587 being_refed++; 3588 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3589 being_refed++; 3590 3591 if ((inp->refcount) || 3592 (being_refed) || 3593 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3594 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3595#ifdef SCTP_LOG_CLOSING 3596 sctp_log_closing(inp, NULL, 4); 3597#endif 3598 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3599 SCTP_INP_WUNLOCK(inp); 3600 SCTP_ASOC_CREATE_UNLOCK(inp); 3601 SCTP_INP_INFO_WUNLOCK(); 3602 return; 3603 } 3604 inp->sctp_ep.signature_change.type = 0; 3605 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3606 /* 3607 * Remove it from the list .. last thing we need a lock for. 3608 */ 3609 LIST_REMOVE(inp, sctp_list); 3610 SCTP_INP_WUNLOCK(inp); 3611 SCTP_ASOC_CREATE_UNLOCK(inp); 3612 SCTP_INP_INFO_WUNLOCK(); 3613 /* 3614 * Now we release all locks. Since this INP cannot be found anymore 3615 * except possibly by the kill timer that might be running. We call 3616 * the drain function here. It should hit the case were it sees the 3617 * ACTIVE flag cleared and exit out freeing us to proceed and 3618 * destroy everything. 3619 */ 3620 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3621 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3622 } else { 3623 /* Probably un-needed */ 3624 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3625 } 3626 3627#ifdef SCTP_LOG_CLOSING 3628 sctp_log_closing(inp, NULL, 5); 3629#endif 3630 3631 3632 if ((inp->sctp_asocidhash) != NULL) { 3633 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3634 inp->sctp_asocidhash = NULL; 3635 } 3636 /* sa_ignore FREED_MEMORY */ 3637 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3638 /* Its only abandoned if it had data left */ 3639 if (sq->length) 3640 SCTP_STAT_INCR(sctps_left_abandon); 3641 3642 TAILQ_REMOVE(&inp->read_queue, sq, next); 3643 sctp_free_remote_addr(sq->whoFrom); 3644 if (so) 3645 so->so_rcv.sb_cc -= sq->length; 3646 if (sq->data) { 3647 sctp_m_freem(sq->data); 3648 sq->data = NULL; 3649 } 3650 /* 3651 * no need to free the net count, since at this point all 3652 * assoc's are gone. 3653 */ 3654 sctp_free_a_readq(NULL, sq); 3655 } 3656 /* Now the sctp_pcb things */ 3657 /* 3658 * free each asoc if it is not already closed/free. we can't use the 3659 * macro here since le_next will get freed as part of the 3660 * sctp_free_assoc() call. 3661 */ 3662#ifdef IPSEC 3663 ipsec_delete_pcbpolicy(ip_pcb); 3664#endif 3665 if (ip_pcb->inp_options) { 3666 (void)sctp_m_free(ip_pcb->inp_options); 3667 ip_pcb->inp_options = 0; 3668 } 3669#ifdef INET6 3670 if (ip_pcb->inp_vflag & INP_IPV6) { 3671 struct in6pcb *in6p; 3672 3673 in6p = (struct in6pcb *)inp; 3674 ip6_freepcbopts(in6p->in6p_outputopts); 3675 } 3676#endif /* INET6 */ 3677 ip_pcb->inp_vflag = 0; 3678 /* free up authentication fields */ 3679 if (inp->sctp_ep.local_auth_chunks != NULL) 3680 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3681 if (inp->sctp_ep.local_hmacs != NULL) 3682 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3683 3684 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3685 LIST_REMOVE(shared_key, next); 3686 sctp_free_sharedkey(shared_key); 3687 /* sa_ignore FREED_MEMORY */ 3688 } 3689 3690 /* 3691 * if we have an address list the following will free the list of 3692 * ifaddr's that are set into this ep. Again macro limitations here, 3693 * since the LIST_FOREACH could be a bad idea. 3694 */ 3695 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3696 sctp_remove_laddr(laddr); 3697 } 3698 3699#ifdef SCTP_TRACK_FREED_ASOCS 3700 /* TEMP CODE */ 3701 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3702 LIST_REMOVE(asoc, sctp_tcblist); 3703 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3704 SCTP_DECR_ASOC_COUNT(); 3705 } 3706 /* *** END TEMP CODE *** */ 3707#endif 3708 /* Now lets see about freeing the EP hash table. */ 3709 if (inp->sctp_tcbhash != NULL) { 3710 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3711 inp->sctp_tcbhash = NULL; 3712 } 3713 /* Now we must put the ep memory back into the zone pool */ 3714 crfree(inp->ip_inp.inp.inp_cred); 3715 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3716 SCTP_INP_LOCK_DESTROY(inp); 3717 SCTP_INP_READ_DESTROY(inp); 3718 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3719 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3720 SCTP_DECR_EP_COUNT(); 3721} 3722 3723 3724struct sctp_nets * 3725sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3726{ 3727 struct sctp_nets *net; 3728 3729 /* locate the address */ 3730 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3731 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3732 return (net); 3733 } 3734 return (NULL); 3735} 3736 3737 3738int 3739sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3740{ 3741 struct sctp_ifa *sctp_ifa; 3742 3743 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3744 if (sctp_ifa) { 3745 return (1); 3746 } else { 3747 return (0); 3748 } 3749} 3750 3751/* 3752 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3753 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3754 * stats of stuff. 3755 */ 3756int 3757sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3758 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3759{ 3760 /* 3761 * The following is redundant to the same lines in the 3762 * sctp_aloc_assoc() but is needed since others call the add address 3763 * function 3764 */ 3765 struct sctp_nets *net, *netfirst; 3766 int addr_inscope; 3767 3768 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3769 from); 3770 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3771 3772 netfirst = sctp_findnet(stcb, newaddr); 3773 if (netfirst) { 3774 /* 3775 * Lie and return ok, we don't want to make the association 3776 * go away for this behavior. It will happen in the TCP 3777 * model in a connected socket. It does not reach the hash 3778 * table until after the association is built so it can't be 3779 * found. Mark as reachable, since the initial creation will 3780 * have been cleared and the NOT_IN_ASSOC flag will have 3781 * been added... and we don't want to end up removing it 3782 * back out. 3783 */ 3784 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3785 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3786 SCTP_ADDR_UNCONFIRMED); 3787 } else { 3788 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3789 } 3790 3791 return (0); 3792 } 3793 addr_inscope = 1; 3794 switch (newaddr->sa_family) { 3795#ifdef INET 3796 case AF_INET: 3797 { 3798 struct sockaddr_in *sin; 3799 3800 sin = (struct sockaddr_in *)newaddr; 3801 if (sin->sin_addr.s_addr == 0) { 3802 /* Invalid address */ 3803 return (-1); 3804 } 3805 /* zero out the bzero area */ 3806 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3807 3808 /* assure len is set */ 3809 sin->sin_len = sizeof(struct sockaddr_in); 3810 if (set_scope) { 3811 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3812 stcb->asoc.scope.ipv4_local_scope = 1; 3813 } 3814 } else { 3815 /* Validate the address is in scope */ 3816 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3817 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3818 addr_inscope = 0; 3819 } 3820 } 3821 break; 3822 } 3823#endif 3824#ifdef INET6 3825 case AF_INET6: 3826 { 3827 struct sockaddr_in6 *sin6; 3828 3829 sin6 = (struct sockaddr_in6 *)newaddr; 3830 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3831 /* Invalid address */ 3832 return (-1); 3833 } 3834 /* assure len is set */ 3835 sin6->sin6_len = sizeof(struct sockaddr_in6); 3836 if (set_scope) { 3837 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3838 stcb->asoc.scope.loopback_scope = 1; 3839 stcb->asoc.scope.local_scope = 0; 3840 stcb->asoc.scope.ipv4_local_scope = 1; 3841 stcb->asoc.scope.site_scope = 1; 3842 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3843 /* 3844 * If the new destination is a 3845 * LINK_LOCAL we must have common 3846 * site scope. Don't set the local 3847 * scope since we may not share all 3848 * links, only loopback can do this. 3849 * Links on the local network would 3850 * also be on our private network 3851 * for v4 too. 3852 */ 3853 stcb->asoc.scope.ipv4_local_scope = 1; 3854 stcb->asoc.scope.site_scope = 1; 3855 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3856 /* 3857 * If the new destination is 3858 * SITE_LOCAL then we must have site 3859 * scope in common. 3860 */ 3861 stcb->asoc.scope.site_scope = 1; 3862 } 3863 } else { 3864 /* Validate the address is in scope */ 3865 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3866 (stcb->asoc.scope.loopback_scope == 0)) { 3867 addr_inscope = 0; 3868 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3869 (stcb->asoc.scope.local_scope == 0)) { 3870 addr_inscope = 0; 3871 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3872 (stcb->asoc.scope.site_scope == 0)) { 3873 addr_inscope = 0; 3874 } 3875 } 3876 break; 3877 } 3878#endif 3879 default: 3880 /* not supported family type */ 3881 return (-1); 3882 } 3883 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3884 if (net == NULL) { 3885 return (-1); 3886 } 3887 SCTP_INCR_RADDR_COUNT(); 3888 bzero(net, sizeof(struct sctp_nets)); 3889 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3890 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3891 switch (newaddr->sa_family) { 3892#ifdef INET 3893 case AF_INET: 3894 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3895 break; 3896#endif 3897#ifdef INET6 3898 case AF_INET6: 3899 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3900 break; 3901#endif 3902 default: 3903 break; 3904 } 3905 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3906 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3907 stcb->asoc.scope.loopback_scope = 1; 3908 stcb->asoc.scope.ipv4_local_scope = 1; 3909 stcb->asoc.scope.local_scope = 0; 3910 stcb->asoc.scope.site_scope = 1; 3911 addr_inscope = 1; 3912 } 3913 net->failure_threshold = stcb->asoc.def_net_failure; 3914 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3915 if (addr_inscope == 0) { 3916 net->dest_state = (SCTP_ADDR_REACHABLE | 3917 SCTP_ADDR_OUT_OF_SCOPE); 3918 } else { 3919 if (from == SCTP_ADDR_IS_CONFIRMED) 3920 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3921 net->dest_state = SCTP_ADDR_REACHABLE; 3922 else 3923 net->dest_state = SCTP_ADDR_REACHABLE | 3924 SCTP_ADDR_UNCONFIRMED; 3925 } 3926 /* 3927 * We set this to 0, the timer code knows that this means its an 3928 * initial value 3929 */ 3930 net->rto_needed = 1; 3931 net->RTO = 0; 3932 net->RTO_measured = 0; 3933 stcb->asoc.numnets++; 3934 net->ref_count = 1; 3935 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3936 net->port = port; 3937 net->dscp = stcb->asoc.default_dscp; 3938#ifdef INET6 3939 net->flowlabel = stcb->asoc.default_flowlabel; 3940#endif 3941 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3942 net->dest_state |= SCTP_ADDR_NOHB; 3943 } else { 3944 net->dest_state &= ~SCTP_ADDR_NOHB; 3945 } 3946 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3947 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3948 } else { 3949 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3950 } 3951 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3952 /* Init the timer structure */ 3953 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3954 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3955 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3956 3957 /* Now generate a route for this guy */ 3958#ifdef INET6 3959 /* KAME hack: embed scopeid */ 3960 if (newaddr->sa_family == AF_INET6) { 3961 struct sockaddr_in6 *sin6; 3962 3963 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3964 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3965 sin6->sin6_scope_id = 0; 3966 } 3967#endif 3968 SCTP_RTALLOC((sctp_route_t *) & net->ro, 3969 stcb->asoc.vrf_id, 3970 stcb->sctp_ep->fibnum); 3971 3972 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3973 /* Get source address */ 3974 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3975 stcb, 3976 (sctp_route_t *) & net->ro, 3977 net, 3978 0, 3979 stcb->asoc.vrf_id); 3980 if (net->ro._s_addr != NULL) { 3981 net->src_addr_selected = 1; 3982 /* Now get the interface MTU */ 3983 if (net->ro._s_addr->ifn_p != NULL) { 3984 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3985 } 3986 } else { 3987 net->src_addr_selected = 0; 3988 } 3989 if (net->mtu > 0) { 3990 uint32_t rmtu; 3991 3992 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3993 if (rmtu == 0) { 3994 /* 3995 * Start things off to match mtu of 3996 * interface please. 3997 */ 3998 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3999 net->ro.ro_rt, net->mtu); 4000 } else { 4001 /* 4002 * we take the route mtu over the interface, 4003 * since the route may be leading out the 4004 * loopback, or a different interface. 4005 */ 4006 net->mtu = rmtu; 4007 } 4008 } 4009 } else { 4010 net->src_addr_selected = 0; 4011 } 4012 if (net->mtu == 0) { 4013 switch (newaddr->sa_family) { 4014#ifdef INET 4015 case AF_INET: 4016 net->mtu = SCTP_DEFAULT_MTU; 4017 break; 4018#endif 4019#ifdef INET6 4020 case AF_INET6: 4021 net->mtu = 1280; 4022 break; 4023#endif 4024 default: 4025 break; 4026 } 4027 } 4028#if defined(INET) || defined(INET6) 4029 if (net->port) { 4030 net->mtu -= (uint32_t) sizeof(struct udphdr); 4031 } 4032#endif 4033 if (from == SCTP_ALLOC_ASOC) { 4034 stcb->asoc.smallest_mtu = net->mtu; 4035 } 4036 if (stcb->asoc.smallest_mtu > net->mtu) { 4037 sctp_pathmtu_adjustment(stcb, net->mtu); 4038 } 4039#ifdef INET6 4040 if (newaddr->sa_family == AF_INET6) { 4041 struct sockaddr_in6 *sin6; 4042 4043 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4044 (void)sa6_recoverscope(sin6); 4045 } 4046#endif 4047 4048 /* JRS - Use the congestion control given in the CC module */ 4049 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4050 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4051 4052 /* 4053 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4054 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4055 */ 4056 net->find_pseudo_cumack = 1; 4057 net->find_rtx_pseudo_cumack = 1; 4058 /* Choose an initial flowid. */ 4059 net->flowid = stcb->asoc.my_vtag ^ 4060 ntohs(stcb->rport) ^ 4061 ntohs(stcb->sctp_ep->sctp_lport); 4062 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4063 if (netp) { 4064 *netp = net; 4065 } 4066 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4067 if (net->ro.ro_rt == NULL) { 4068 /* Since we have no route put it at the back */ 4069 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4070 } else if (netfirst == NULL) { 4071 /* We are the first one in the pool. */ 4072 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4073 } else if (netfirst->ro.ro_rt == NULL) { 4074 /* 4075 * First one has NO route. Place this one ahead of the first 4076 * one. 4077 */ 4078 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4079 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4080 /* 4081 * This one has a different interface than the one at the 4082 * top of the list. Place it ahead. 4083 */ 4084 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4085 } else { 4086 /* 4087 * Ok we have the same interface as the first one. Move 4088 * forward until we find either a) one with a NULL route... 4089 * insert ahead of that b) one with a different ifp.. insert 4090 * after that. c) end of the list.. insert at the tail. 4091 */ 4092 struct sctp_nets *netlook; 4093 4094 do { 4095 netlook = TAILQ_NEXT(netfirst, sctp_next); 4096 if (netlook == NULL) { 4097 /* End of the list */ 4098 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4099 break; 4100 } else if (netlook->ro.ro_rt == NULL) { 4101 /* next one has NO route */ 4102 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4103 break; 4104 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4105 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4106 net, sctp_next); 4107 break; 4108 } 4109 /* Shift forward */ 4110 netfirst = netlook; 4111 } while (netlook != NULL); 4112 } 4113 4114 /* got to have a primary set */ 4115 if (stcb->asoc.primary_destination == 0) { 4116 stcb->asoc.primary_destination = net; 4117 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4118 (net->ro.ro_rt) && 4119 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4120 /* No route to current primary adopt new primary */ 4121 stcb->asoc.primary_destination = net; 4122 } 4123 /* Validate primary is first */ 4124 net = TAILQ_FIRST(&stcb->asoc.nets); 4125 if ((net != stcb->asoc.primary_destination) && 4126 (stcb->asoc.primary_destination)) { 4127 /* 4128 * first one on the list is NOT the primary sctp_cmpaddr() 4129 * is much more efficient if the primary is the first on the 4130 * list, make it so. 4131 */ 4132 TAILQ_REMOVE(&stcb->asoc.nets, 4133 stcb->asoc.primary_destination, sctp_next); 4134 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4135 stcb->asoc.primary_destination, sctp_next); 4136 } 4137 return (0); 4138} 4139 4140 4141static uint32_t 4142sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4143{ 4144 uint32_t id; 4145 struct sctpasochead *head; 4146 struct sctp_tcb *lstcb; 4147 4148 SCTP_INP_WLOCK(inp); 4149try_again: 4150 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4151 /* TSNH */ 4152 SCTP_INP_WUNLOCK(inp); 4153 return (0); 4154 } 4155 /* 4156 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4157 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4158 */ 4159 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4160 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4161 } 4162 id = inp->sctp_associd_counter; 4163 inp->sctp_associd_counter++; 4164 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4165 if (lstcb) { 4166 goto try_again; 4167 } 4168 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4169 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4170 stcb->asoc.in_asocid_hash = 1; 4171 SCTP_INP_WUNLOCK(inp); 4172 return id; 4173} 4174 4175/* 4176 * allocate an association and add it to the endpoint. The caller must be 4177 * careful to add all additional addresses once they are know right away or 4178 * else the assoc will be may experience a blackout scenario. 4179 */ 4180struct sctp_tcb * 4181sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4182 int *error, uint32_t override_tag, uint32_t vrf_id, 4183 uint16_t o_streams, uint16_t port, 4184 struct thread *p 4185) 4186{ 4187 /* note the p argument is only valid in unbound sockets */ 4188 4189 struct sctp_tcb *stcb; 4190 struct sctp_association *asoc; 4191 struct sctpasochead *head; 4192 uint16_t rport; 4193 int err; 4194 4195 /* 4196 * Assumption made here: Caller has done a 4197 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4198 * address does not exist already. 4199 */ 4200 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4201 /* Hit max assoc, sorry no more */ 4202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4203 *error = ENOBUFS; 4204 return (NULL); 4205 } 4206 if (firstaddr == NULL) { 4207 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4208 *error = EINVAL; 4209 return (NULL); 4210 } 4211 SCTP_INP_RLOCK(inp); 4212 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4213 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4214 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4215 /* 4216 * If its in the TCP pool, its NOT allowed to create an 4217 * association. The parent listener needs to call 4218 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4219 * off, or connected one does this.. its an error. 4220 */ 4221 SCTP_INP_RUNLOCK(inp); 4222 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4223 *error = EINVAL; 4224 return (NULL); 4225 } 4226 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4227 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4228 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4229 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4230 SCTP_INP_RUNLOCK(inp); 4231 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4232 *error = EINVAL; 4233 return (NULL); 4234 } 4235 } 4236 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4237#ifdef SCTP_DEBUG 4238 if (firstaddr) { 4239 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4240 switch (firstaddr->sa_family) { 4241#ifdef INET 4242 case AF_INET: 4243 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4244 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4245 break; 4246#endif 4247#ifdef INET6 4248 case AF_INET6: 4249 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4250 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4251 break; 4252#endif 4253 default: 4254 break; 4255 } 4256 } else { 4257 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4258 } 4259#endif /* SCTP_DEBUG */ 4260 switch (firstaddr->sa_family) { 4261#ifdef INET 4262 case AF_INET: 4263 { 4264 struct sockaddr_in *sin; 4265 4266 sin = (struct sockaddr_in *)firstaddr; 4267 if ((ntohs(sin->sin_port) == 0) || 4268 (sin->sin_addr.s_addr == INADDR_ANY) || 4269 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4270 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4271 /* Invalid address */ 4272 SCTP_INP_RUNLOCK(inp); 4273 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4274 *error = EINVAL; 4275 return (NULL); 4276 } 4277 rport = sin->sin_port; 4278 break; 4279 } 4280#endif 4281#ifdef INET6 4282 case AF_INET6: 4283 { 4284 struct sockaddr_in6 *sin6; 4285 4286 sin6 = (struct sockaddr_in6 *)firstaddr; 4287 if ((ntohs(sin6->sin6_port) == 0) || 4288 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4289 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4290 /* Invalid address */ 4291 SCTP_INP_RUNLOCK(inp); 4292 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4293 *error = EINVAL; 4294 return (NULL); 4295 } 4296 rport = sin6->sin6_port; 4297 break; 4298 } 4299#endif 4300 default: 4301 /* not supported family type */ 4302 SCTP_INP_RUNLOCK(inp); 4303 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4304 *error = EINVAL; 4305 return (NULL); 4306 } 4307 SCTP_INP_RUNLOCK(inp); 4308 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4309 /* 4310 * If you have not performed a bind, then we need to do the 4311 * ephemeral bind for you. 4312 */ 4313 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4314 (struct sockaddr *)NULL, 4315 (struct sctp_ifa *)NULL, 4316 p 4317 ))) { 4318 /* bind error, probably perm */ 4319 *error = err; 4320 return (NULL); 4321 } 4322 } 4323 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4324 if (stcb == NULL) { 4325 /* out of memory? */ 4326 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4327 *error = ENOMEM; 4328 return (NULL); 4329 } 4330 SCTP_INCR_ASOC_COUNT(); 4331 4332 bzero(stcb, sizeof(*stcb)); 4333 asoc = &stcb->asoc; 4334 4335 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4336 SCTP_TCB_LOCK_INIT(stcb); 4337 SCTP_TCB_SEND_LOCK_INIT(stcb); 4338 stcb->rport = rport; 4339 /* setup back pointer's */ 4340 stcb->sctp_ep = inp; 4341 stcb->sctp_socket = inp->sctp_socket; 4342 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4343 /* failed */ 4344 SCTP_TCB_LOCK_DESTROY(stcb); 4345 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4346 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4347 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4348 SCTP_DECR_ASOC_COUNT(); 4349 *error = err; 4350 return (NULL); 4351 } 4352 /* and the port */ 4353 SCTP_INP_INFO_WLOCK(); 4354 SCTP_INP_WLOCK(inp); 4355 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4356 /* inpcb freed while alloc going on */ 4357 SCTP_TCB_LOCK_DESTROY(stcb); 4358 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4359 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4360 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4361 SCTP_INP_WUNLOCK(inp); 4362 SCTP_INP_INFO_WUNLOCK(); 4363 SCTP_DECR_ASOC_COUNT(); 4364 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4365 *error = EINVAL; 4366 return (NULL); 4367 } 4368 SCTP_TCB_LOCK(stcb); 4369 4370 /* now that my_vtag is set, add it to the hash */ 4371 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4372 /* put it in the bucket in the vtag hash of assoc's for the system */ 4373 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4374 SCTP_INP_INFO_WUNLOCK(); 4375 4376 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4377 /* failure.. memory error? */ 4378 if (asoc->strmout) { 4379 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4380 asoc->strmout = NULL; 4381 } 4382 if (asoc->mapping_array) { 4383 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4384 asoc->mapping_array = NULL; 4385 } 4386 if (asoc->nr_mapping_array) { 4387 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4388 asoc->nr_mapping_array = NULL; 4389 } 4390 SCTP_DECR_ASOC_COUNT(); 4391 SCTP_TCB_UNLOCK(stcb); 4392 SCTP_TCB_LOCK_DESTROY(stcb); 4393 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4394 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4395 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4396 SCTP_INP_WUNLOCK(inp); 4397 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4398 *error = ENOBUFS; 4399 return (NULL); 4400 } 4401 /* Init all the timers */ 4402 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4403 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4404 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4405 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4406 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4407 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4408 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4409 4410 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4411 /* now file the port under the hash as well */ 4412 if (inp->sctp_tcbhash != NULL) { 4413 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4414 inp->sctp_hashmark)]; 4415 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4416 } 4417 SCTP_INP_WUNLOCK(inp); 4418 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4419 return (stcb); 4420} 4421 4422 4423void 4424sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4425{ 4426 struct sctp_association *asoc; 4427 4428 asoc = &stcb->asoc; 4429 asoc->numnets--; 4430 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4431 if (net == asoc->primary_destination) { 4432 /* Reset primary */ 4433 struct sctp_nets *lnet; 4434 4435 lnet = TAILQ_FIRST(&asoc->nets); 4436 /* 4437 * Mobility adaptation Ideally, if deleted destination is 4438 * the primary, it becomes a fast retransmission trigger by 4439 * the subsequent SET PRIMARY. (by micchie) 4440 */ 4441 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4442 SCTP_MOBILITY_BASE) || 4443 sctp_is_mobility_feature_on(stcb->sctp_ep, 4444 SCTP_MOBILITY_FASTHANDOFF)) { 4445 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4446 if (asoc->deleted_primary != NULL) { 4447 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4448 goto out; 4449 } 4450 asoc->deleted_primary = net; 4451 atomic_add_int(&net->ref_count, 1); 4452 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4453 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4454 sctp_mobility_feature_on(stcb->sctp_ep, 4455 SCTP_MOBILITY_PRIM_DELETED); 4456 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4457 stcb->sctp_ep, stcb, NULL); 4458 } 4459out: 4460 /* Try to find a confirmed primary */ 4461 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4462 } 4463 if (net == asoc->last_data_chunk_from) { 4464 /* Reset primary */ 4465 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4466 } 4467 if (net == asoc->last_control_chunk_from) { 4468 /* Clear net */ 4469 asoc->last_control_chunk_from = NULL; 4470 } 4471 if (net == stcb->asoc.alternate) { 4472 sctp_free_remote_addr(stcb->asoc.alternate); 4473 stcb->asoc.alternate = NULL; 4474 } 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 */ 4482int 4483sctp_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 4518void 4519sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4520{ 4521 struct sctpvtaghead *chain; 4522 struct sctp_tagblock *twait_block; 4523 int found = 0; 4524 int i; 4525 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].v_tag == tag) && 4530 (twait_block->vtag_block[i].lport == lport) && 4531 (twait_block->vtag_block[i].rport == rport)) { 4532 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4533 twait_block->vtag_block[i].v_tag = 0; 4534 twait_block->vtag_block[i].lport = 0; 4535 twait_block->vtag_block[i].rport = 0; 4536 found = 1; 4537 break; 4538 } 4539 } 4540 if (found) 4541 break; 4542 } 4543} 4544 4545int 4546sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4547{ 4548 struct sctpvtaghead *chain; 4549 struct sctp_tagblock *twait_block; 4550 int found = 0; 4551 int i; 4552 4553 SCTP_INP_INFO_WLOCK(); 4554 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4555 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4556 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4557 if ((twait_block->vtag_block[i].v_tag == tag) && 4558 (twait_block->vtag_block[i].lport == lport) && 4559 (twait_block->vtag_block[i].rport == rport)) { 4560 found = 1; 4561 break; 4562 } 4563 } 4564 if (found) 4565 break; 4566 } 4567 SCTP_INP_INFO_WUNLOCK(); 4568 return (found); 4569} 4570 4571 4572void 4573sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4574{ 4575 struct sctpvtaghead *chain; 4576 struct sctp_tagblock *twait_block; 4577 struct timeval now; 4578 int set, i; 4579 4580 if (time == 0) { 4581 /* Its disabled */ 4582 return; 4583 } 4584 (void)SCTP_GETTIME_TIMEVAL(&now); 4585 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4586 set = 0; 4587 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4588 /* Block(s) present, lets find space, and expire on the fly */ 4589 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4590 if ((twait_block->vtag_block[i].v_tag == 0) && 4591 !set) { 4592 twait_block->vtag_block[i].tv_sec_at_expire = 4593 now.tv_sec + time; 4594 twait_block->vtag_block[i].v_tag = tag; 4595 twait_block->vtag_block[i].lport = lport; 4596 twait_block->vtag_block[i].rport = rport; 4597 set = 1; 4598 } else if ((twait_block->vtag_block[i].v_tag) && 4599 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4600 /* Audit expires this guy */ 4601 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4602 twait_block->vtag_block[i].v_tag = 0; 4603 twait_block->vtag_block[i].lport = 0; 4604 twait_block->vtag_block[i].rport = 0; 4605 if (set == 0) { 4606 /* Reuse it for my new tag */ 4607 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4608 twait_block->vtag_block[i].v_tag = tag; 4609 twait_block->vtag_block[i].lport = lport; 4610 twait_block->vtag_block[i].rport = rport; 4611 set = 1; 4612 } 4613 } 4614 } 4615 if (set) { 4616 /* 4617 * We only do up to the block where we can place our 4618 * tag for audits 4619 */ 4620 break; 4621 } 4622 } 4623 /* Need to add a new block to chain */ 4624 if (!set) { 4625 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4626 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4627 if (twait_block == NULL) { 4628#ifdef INVARIANTS 4629 panic("Can not alloc tagblock"); 4630#endif 4631 return; 4632 } 4633 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4634 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4635 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4636 twait_block->vtag_block[0].v_tag = tag; 4637 twait_block->vtag_block[0].lport = lport; 4638 twait_block->vtag_block[0].rport = rport; 4639 } 4640} 4641 4642void 4643sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4644{ 4645 struct sctp_tmit_chunk *chk, *nchk; 4646 struct sctp_queued_to_read *ctl, *nctl; 4647 4648 TAILQ_FOREACH_SAFE(ctl, rh, next_instrm, nctl) { 4649 TAILQ_REMOVE(rh, ctl, next_instrm); 4650 ctl->on_strm_q = 0; 4651 if (ctl->on_read_q == 0) { 4652 sctp_free_remote_addr(ctl->whoFrom); 4653 if (ctl->data) { 4654 sctp_m_freem(ctl->data); 4655 ctl->data = NULL; 4656 } 4657 } 4658 /* Reassembly free? */ 4659 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 4660 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 4661 if (chk->data) { 4662 sctp_m_freem(chk->data); 4663 chk->data = NULL; 4664 } 4665 if (chk->holds_key_ref) 4666 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4667 sctp_free_remote_addr(chk->whoTo); 4668 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4669 SCTP_DECR_CHK_COUNT(); 4670 /* sa_ignore FREED_MEMORY */ 4671 } 4672 /* 4673 * We don't free the address here since all the net's were 4674 * freed above. 4675 */ 4676 if (ctl->on_read_q == 0) { 4677 sctp_free_a_readq(stcb, ctl); 4678 } 4679 } 4680} 4681 4682 4683/*- 4684 * Free the association after un-hashing the remote port. This 4685 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4686 * expect that the input to this function IS a locked TCB. 4687 * It will return 0, if it did NOT destroy the association (instead 4688 * it unlocks it. It will return NON-zero if it either destroyed the 4689 * association OR the association is already destroyed. 4690 */ 4691int 4692sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4693{ 4694 int i; 4695 struct sctp_association *asoc; 4696 struct sctp_nets *net, *nnet; 4697 struct sctp_laddr *laddr, *naddr; 4698 struct sctp_tmit_chunk *chk, *nchk; 4699 struct sctp_asconf_addr *aparam, *naparam; 4700 struct sctp_asconf_ack *aack, *naack; 4701 struct sctp_stream_reset_list *strrst, *nstrrst; 4702 struct sctp_queued_to_read *sq, *nsq; 4703 struct sctp_stream_queue_pending *sp, *nsp; 4704 sctp_sharedkey_t *shared_key, *nshared_key; 4705 struct socket *so; 4706 4707 /* first, lets purge the entry from the hash table. */ 4708 4709#ifdef SCTP_LOG_CLOSING 4710 sctp_log_closing(inp, stcb, 6); 4711#endif 4712 if (stcb->asoc.state == 0) { 4713#ifdef SCTP_LOG_CLOSING 4714 sctp_log_closing(inp, NULL, 7); 4715#endif 4716 /* there is no asoc, really TSNH :-0 */ 4717 return (1); 4718 } 4719 if (stcb->asoc.alternate) { 4720 sctp_free_remote_addr(stcb->asoc.alternate); 4721 stcb->asoc.alternate = NULL; 4722 } 4723 /* TEMP CODE */ 4724 if (stcb->freed_from_where == 0) { 4725 /* Only record the first place free happened from */ 4726 stcb->freed_from_where = from_location; 4727 } 4728 /* TEMP CODE */ 4729 4730 asoc = &stcb->asoc; 4731 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4732 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4733 /* nothing around */ 4734 so = NULL; 4735 else 4736 so = inp->sctp_socket; 4737 4738 /* 4739 * We used timer based freeing if a reader or writer is in the way. 4740 * So we first check if we are actually being called from a timer, 4741 * if so we abort early if a reader or writer is still in the way. 4742 */ 4743 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4744 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4745 /* 4746 * is it the timer driving us? if so are the reader/writers 4747 * gone? 4748 */ 4749 if (stcb->asoc.refcnt) { 4750 /* nope, reader or writer in the way */ 4751 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4752 /* no asoc destroyed */ 4753 SCTP_TCB_UNLOCK(stcb); 4754#ifdef SCTP_LOG_CLOSING 4755 sctp_log_closing(inp, stcb, 8); 4756#endif 4757 return (0); 4758 } 4759 } 4760 /* now clean up any other timers */ 4761 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4762 asoc->dack_timer.self = NULL; 4763 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4764 /*- 4765 * For stream reset we don't blast this unless 4766 * it is a str-reset timer, it might be the 4767 * free-asoc timer which we DON'T want to 4768 * disturb. 4769 */ 4770 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4771 asoc->strreset_timer.self = NULL; 4772 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4773 asoc->asconf_timer.self = NULL; 4774 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4775 asoc->autoclose_timer.self = NULL; 4776 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4777 asoc->shut_guard_timer.self = NULL; 4778 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4779 asoc->delayed_event_timer.self = NULL; 4780 /* Mobility adaptation */ 4781 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4782 asoc->delete_prim_timer.self = NULL; 4783 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4784 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4785 net->rxt_timer.self = NULL; 4786 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4787 net->pmtu_timer.self = NULL; 4788 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4789 net->hb_timer.self = NULL; 4790 } 4791 /* Now the read queue needs to be cleaned up (only once) */ 4792 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4793 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4794 SCTP_INP_READ_LOCK(inp); 4795 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4796 if (sq->stcb == stcb) { 4797 sq->do_not_ref_stcb = 1; 4798 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4799 /* 4800 * If there is no end, there never will be 4801 * now. 4802 */ 4803 if (sq->end_added == 0) { 4804 /* Held for PD-API clear that. */ 4805 sq->pdapi_aborted = 1; 4806 sq->held_length = 0; 4807 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4808 /* 4809 * Need to add a PD-API 4810 * aborted indication. 4811 * Setting the control_pdapi 4812 * assures that it will be 4813 * added right after this 4814 * msg. 4815 */ 4816 uint32_t strseq; 4817 4818 stcb->asoc.control_pdapi = sq; 4819 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4820 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4821 stcb, 4822 SCTP_PARTIAL_DELIVERY_ABORTED, 4823 (void *)&strseq, 4824 SCTP_SO_LOCKED); 4825 stcb->asoc.control_pdapi = NULL; 4826 } 4827 } 4828 /* Add an end to wake them */ 4829 sq->end_added = 1; 4830 } 4831 } 4832 SCTP_INP_READ_UNLOCK(inp); 4833 if (stcb->block_entry) { 4834 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4835 stcb->block_entry->error = ECONNRESET; 4836 stcb->block_entry = NULL; 4837 } 4838 } 4839 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4840 /* 4841 * Someone holds a reference OR the socket is unaccepted 4842 * yet. 4843 */ 4844 if ((stcb->asoc.refcnt) || 4845 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4846 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4847 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4848 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4849 } 4850 SCTP_TCB_UNLOCK(stcb); 4851 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4852 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4853 /* nothing around */ 4854 so = NULL; 4855 if (so) { 4856 /* Wake any reader/writers */ 4857 sctp_sorwakeup(inp, so); 4858 sctp_sowwakeup(inp, so); 4859 } 4860#ifdef SCTP_LOG_CLOSING 4861 sctp_log_closing(inp, stcb, 9); 4862#endif 4863 /* no asoc destroyed */ 4864 return (0); 4865 } 4866#ifdef SCTP_LOG_CLOSING 4867 sctp_log_closing(inp, stcb, 10); 4868#endif 4869 /* 4870 * When I reach here, no others want to kill the assoc yet.. and I 4871 * own the lock. Now its possible an abort comes in when I do the 4872 * lock exchange below to grab all the locks to do the final take 4873 * out. to prevent this we increment the count, which will start a 4874 * timer and blow out above thus assuring us that we hold exclusive 4875 * killing of the asoc. Note that after getting back the TCB lock we 4876 * will go ahead and increment the counter back up and stop any 4877 * timer a passing stranger may have started :-S 4878 */ 4879 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4880 atomic_add_int(&stcb->asoc.refcnt, 1); 4881 4882 SCTP_TCB_UNLOCK(stcb); 4883 SCTP_INP_INFO_WLOCK(); 4884 SCTP_INP_WLOCK(inp); 4885 SCTP_TCB_LOCK(stcb); 4886 } 4887 /* Double check the GONE flag */ 4888 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4889 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4890 /* nothing around */ 4891 so = NULL; 4892 4893 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4894 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4895 /* 4896 * For TCP type we need special handling when we are 4897 * connected. We also include the peel'ed off ones to. 4898 */ 4899 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4900 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4901 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4902 if (so) { 4903 SOCK_LOCK(so); 4904 if (so->so_rcv.sb_cc == 0) { 4905 so->so_state &= ~(SS_ISCONNECTING | 4906 SS_ISDISCONNECTING | 4907 SS_ISCONFIRMING | 4908 SS_ISCONNECTED); 4909 } 4910 socantrcvmore_locked(so); 4911 sctp_sowwakeup(inp, so); 4912 sctp_sorwakeup(inp, so); 4913 SCTP_SOWAKEUP(so); 4914 } 4915 } 4916 } 4917 /* 4918 * Make it invalid too, that way if its about to run it will abort 4919 * and return. 4920 */ 4921 /* re-increment the lock */ 4922 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4923 atomic_add_int(&stcb->asoc.refcnt, -1); 4924 } 4925 if (stcb->asoc.refcnt) { 4926 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4927 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4928 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4929 SCTP_INP_INFO_WUNLOCK(); 4930 SCTP_INP_WUNLOCK(inp); 4931 } 4932 SCTP_TCB_UNLOCK(stcb); 4933 return (0); 4934 } 4935 asoc->state = 0; 4936 if (inp->sctp_tcbhash) { 4937 LIST_REMOVE(stcb, sctp_tcbhash); 4938 } 4939 if (stcb->asoc.in_asocid_hash) { 4940 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4941 } 4942 /* Now lets remove it from the list of ALL associations in the EP */ 4943 LIST_REMOVE(stcb, sctp_tcblist); 4944 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4945 SCTP_INP_INCR_REF(inp); 4946 SCTP_INP_WUNLOCK(inp); 4947 } 4948 /* pull from vtag hash */ 4949 LIST_REMOVE(stcb, sctp_asocs); 4950 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4951 inp->sctp_lport, stcb->rport); 4952 4953 /* 4954 * Now restop the timers to be sure this is paranoia at is finest! 4955 */ 4956 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4957 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4958 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4959 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4960 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4961 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4962 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4963 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4964 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4965 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4966 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4967 } 4968 4969 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4970 /* 4971 * The chunk lists and such SHOULD be empty but we check them just 4972 * in case. 4973 */ 4974 /* anything on the wheel needs to be removed */ 4975 for (i = 0; i < asoc->streamoutcnt; i++) { 4976 struct sctp_stream_out *outs; 4977 4978 outs = &asoc->strmout[i]; 4979 /* now clean up any chunks here */ 4980 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4981 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4982 TAILQ_REMOVE(&outs->outqueue, sp, next); 4983 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0); 4984 sctp_free_spbufspace(stcb, asoc, sp); 4985 if (sp->data) { 4986 if (so) { 4987 /* Still an open socket - report */ 4988 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4989 0, (void *)sp, SCTP_SO_LOCKED); 4990 } 4991 if (sp->data) { 4992 sctp_m_freem(sp->data); 4993 sp->data = NULL; 4994 sp->tail_mbuf = NULL; 4995 sp->length = 0; 4996 } 4997 } 4998 if (sp->net) { 4999 sctp_free_remote_addr(sp->net); 5000 sp->net = NULL; 5001 } 5002 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 5003 } 5004 } 5005 /* sa_ignore FREED_MEMORY */ 5006 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 5007 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 5008 SCTP_FREE(strrst, SCTP_M_STRESET); 5009 } 5010 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 5011 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 5012 if (sq->data) { 5013 sctp_m_freem(sq->data); 5014 sq->data = NULL; 5015 } 5016 sctp_free_remote_addr(sq->whoFrom); 5017 sq->whoFrom = NULL; 5018 sq->stcb = NULL; 5019 /* Free the ctl entry */ 5020 sctp_free_a_readq(stcb, sq); 5021 /* sa_ignore FREED_MEMORY */ 5022 } 5023 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5024 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5025 if (chk->data) { 5026 sctp_m_freem(chk->data); 5027 chk->data = NULL; 5028 } 5029 if (chk->holds_key_ref) 5030 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5031 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5032 SCTP_DECR_CHK_COUNT(); 5033 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5034 asoc->free_chunk_cnt--; 5035 /* sa_ignore FREED_MEMORY */ 5036 } 5037 /* pending send queue SHOULD be empty */ 5038 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5039 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5040 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5041#ifdef INVARIANTS 5042 } else { 5043 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5044#endif 5045 } 5046 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5047 if (chk->data) { 5048 if (so) { 5049 /* Still a socket? */ 5050 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5051 0, chk, SCTP_SO_LOCKED); 5052 } 5053 if (chk->data) { 5054 sctp_m_freem(chk->data); 5055 chk->data = NULL; 5056 } 5057 } 5058 if (chk->holds_key_ref) 5059 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5060 if (chk->whoTo) { 5061 sctp_free_remote_addr(chk->whoTo); 5062 chk->whoTo = NULL; 5063 } 5064 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5065 SCTP_DECR_CHK_COUNT(); 5066 /* sa_ignore FREED_MEMORY */ 5067 } 5068 /* sent queue SHOULD be empty */ 5069 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5070 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5071 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5072 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5073#ifdef INVARIANTS 5074 } else { 5075 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5076#endif 5077 } 5078 } 5079 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5080 if (chk->data) { 5081 if (so) { 5082 /* Still a socket? */ 5083 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5084 0, chk, SCTP_SO_LOCKED); 5085 } 5086 if (chk->data) { 5087 sctp_m_freem(chk->data); 5088 chk->data = NULL; 5089 } 5090 } 5091 if (chk->holds_key_ref) 5092 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5093 sctp_free_remote_addr(chk->whoTo); 5094 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5095 SCTP_DECR_CHK_COUNT(); 5096 /* sa_ignore FREED_MEMORY */ 5097 } 5098#ifdef INVARIANTS 5099 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5100 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5101 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5102 } 5103 } 5104#endif 5105 /* control queue MAY not be empty */ 5106 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5107 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5108 if (chk->data) { 5109 sctp_m_freem(chk->data); 5110 chk->data = NULL; 5111 } 5112 if (chk->holds_key_ref) 5113 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5114 sctp_free_remote_addr(chk->whoTo); 5115 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5116 SCTP_DECR_CHK_COUNT(); 5117 /* sa_ignore FREED_MEMORY */ 5118 } 5119 /* ASCONF queue MAY not be empty */ 5120 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5121 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5122 if (chk->data) { 5123 sctp_m_freem(chk->data); 5124 chk->data = NULL; 5125 } 5126 if (chk->holds_key_ref) 5127 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5128 sctp_free_remote_addr(chk->whoTo); 5129 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5130 SCTP_DECR_CHK_COUNT(); 5131 /* sa_ignore FREED_MEMORY */ 5132 } 5133 if (asoc->mapping_array) { 5134 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5135 asoc->mapping_array = NULL; 5136 } 5137 if (asoc->nr_mapping_array) { 5138 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5139 asoc->nr_mapping_array = NULL; 5140 } 5141 /* the stream outs */ 5142 if (asoc->strmout) { 5143 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5144 asoc->strmout = NULL; 5145 } 5146 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5147 if (asoc->strmin) { 5148 for (i = 0; i < asoc->streamincnt; i++) { 5149 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5150 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5151 } 5152 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5153 asoc->strmin = NULL; 5154 } 5155 asoc->streamincnt = 0; 5156 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5157#ifdef INVARIANTS 5158 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5159 panic("no net's left alloc'ed, or list points to itself"); 5160 } 5161#endif 5162 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5163 sctp_free_remote_addr(net); 5164 } 5165 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5166 /* sa_ignore FREED_MEMORY */ 5167 sctp_remove_laddr(laddr); 5168 } 5169 5170 /* pending asconf (address) parameters */ 5171 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5172 /* sa_ignore FREED_MEMORY */ 5173 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5174 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5175 } 5176 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5177 /* sa_ignore FREED_MEMORY */ 5178 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5179 if (aack->data != NULL) { 5180 sctp_m_freem(aack->data); 5181 } 5182 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5183 } 5184 /* clean up auth stuff */ 5185 if (asoc->local_hmacs) 5186 sctp_free_hmaclist(asoc->local_hmacs); 5187 if (asoc->peer_hmacs) 5188 sctp_free_hmaclist(asoc->peer_hmacs); 5189 5190 if (asoc->local_auth_chunks) 5191 sctp_free_chunklist(asoc->local_auth_chunks); 5192 if (asoc->peer_auth_chunks) 5193 sctp_free_chunklist(asoc->peer_auth_chunks); 5194 5195 sctp_free_authinfo(&asoc->authinfo); 5196 5197 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5198 LIST_REMOVE(shared_key, next); 5199 sctp_free_sharedkey(shared_key); 5200 /* sa_ignore FREED_MEMORY */ 5201 } 5202 5203 /* Insert new items here :> */ 5204 5205 /* Get rid of LOCK */ 5206 SCTP_TCB_UNLOCK(stcb); 5207 SCTP_TCB_LOCK_DESTROY(stcb); 5208 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5209 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5210 SCTP_INP_INFO_WUNLOCK(); 5211 SCTP_INP_RLOCK(inp); 5212 } 5213#ifdef SCTP_TRACK_FREED_ASOCS 5214 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5215 /* now clean up the tasoc itself */ 5216 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5217 SCTP_DECR_ASOC_COUNT(); 5218 } else { 5219 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5220 } 5221#else 5222 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5223 SCTP_DECR_ASOC_COUNT(); 5224#endif 5225 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5226 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5227 /* 5228 * If its NOT the inp_free calling us AND sctp_close 5229 * as been called, we call back... 5230 */ 5231 SCTP_INP_RUNLOCK(inp); 5232 /* 5233 * This will start the kill timer (if we are the 5234 * last one) since we hold an increment yet. But 5235 * this is the only safe way to do this since 5236 * otherwise if the socket closes at the same time 5237 * we are here we might collide in the cleanup. 5238 */ 5239 sctp_inpcb_free(inp, 5240 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5241 SCTP_CALLED_DIRECTLY_NOCMPSET); 5242 SCTP_INP_DECR_REF(inp); 5243 goto out_of; 5244 } else { 5245 /* The socket is still open. */ 5246 SCTP_INP_DECR_REF(inp); 5247 } 5248 } 5249 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5250 SCTP_INP_RUNLOCK(inp); 5251 } 5252out_of: 5253 /* destroyed the asoc */ 5254#ifdef SCTP_LOG_CLOSING 5255 sctp_log_closing(inp, NULL, 11); 5256#endif 5257 return (1); 5258} 5259 5260 5261 5262/* 5263 * determine if a destination is "reachable" based upon the addresses bound 5264 * to the current endpoint (e.g. only v4 or v6 currently bound) 5265 */ 5266/* 5267 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5268 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5269 * types bound as its endpoint 5270 */ 5271int 5272sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5273{ 5274 struct sctp_inpcb *inp; 5275 int answer; 5276 5277 /* 5278 * No locks here, the TCB, in all cases is already locked and an 5279 * assoc is up. There is either a INP lock by the caller applied (in 5280 * asconf case when deleting an address) or NOT in the HB case, 5281 * however if HB then the INP increment is up and the INP will not 5282 * be removed (on top of the fact that we have a TCB lock). So we 5283 * only want to read the sctp_flags, which is either bound-all or 5284 * not.. no protection needed since once an assoc is up you can't be 5285 * changing your binding. 5286 */ 5287 inp = stcb->sctp_ep; 5288 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5289 /* if bound all, destination is not restricted */ 5290 /* 5291 * RRS: Question during lock work: Is this correct? If you 5292 * are bound-all you still might need to obey the V4--V6 5293 * flags??? IMO this bound-all stuff needs to be removed! 5294 */ 5295 return (1); 5296 } 5297 /* NOTE: all "scope" checks are done when local addresses are added */ 5298 switch (destaddr->sa_family) { 5299#ifdef INET6 5300 case AF_INET6: 5301 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5302 break; 5303#endif 5304#ifdef INET 5305 case AF_INET: 5306 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5307 break; 5308#endif 5309 default: 5310 /* invalid family, so it's unreachable */ 5311 answer = 0; 5312 break; 5313 } 5314 return (answer); 5315} 5316 5317/* 5318 * update the inp_vflags on an endpoint 5319 */ 5320static void 5321sctp_update_ep_vflag(struct sctp_inpcb *inp) 5322{ 5323 struct sctp_laddr *laddr; 5324 5325 /* first clear the flag */ 5326 inp->ip_inp.inp.inp_vflag = 0; 5327 /* set the flag based on addresses on the ep list */ 5328 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5329 if (laddr->ifa == NULL) { 5330 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5331 __func__); 5332 continue; 5333 } 5334 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5335 continue; 5336 } 5337 switch (laddr->ifa->address.sa.sa_family) { 5338#ifdef INET6 5339 case AF_INET6: 5340 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5341 break; 5342#endif 5343#ifdef INET 5344 case AF_INET: 5345 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5346 break; 5347#endif 5348 default: 5349 break; 5350 } 5351 } 5352} 5353 5354/* 5355 * Add the address to the endpoint local address list There is nothing to be 5356 * done if we are bound to all addresses 5357 */ 5358void 5359sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5360{ 5361 struct sctp_laddr *laddr; 5362 struct sctp_tcb *stcb; 5363 int fnd, error = 0; 5364 5365 fnd = 0; 5366 5367 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5368 /* You are already bound to all. You have it already */ 5369 return; 5370 } 5371#ifdef INET6 5372 if (ifa->address.sa.sa_family == AF_INET6) { 5373 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5374 /* Can't bind a non-useable addr. */ 5375 return; 5376 } 5377 } 5378#endif 5379 /* first, is it already present? */ 5380 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5381 if (laddr->ifa == ifa) { 5382 fnd = 1; 5383 break; 5384 } 5385 } 5386 5387 if (fnd == 0) { 5388 /* Not in the ep list */ 5389 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5390 if (error != 0) 5391 return; 5392 inp->laddr_count++; 5393 /* update inp_vflag flags */ 5394 switch (ifa->address.sa.sa_family) { 5395#ifdef INET6 5396 case AF_INET6: 5397 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5398 break; 5399#endif 5400#ifdef INET 5401 case AF_INET: 5402 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5403 break; 5404#endif 5405 default: 5406 break; 5407 } 5408 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5409 sctp_add_local_addr_restricted(stcb, ifa); 5410 } 5411 } 5412 return; 5413} 5414 5415 5416/* 5417 * select a new (hopefully reachable) destination net (should only be used 5418 * when we deleted an ep addr that is the only usable source address to reach 5419 * the destination net) 5420 */ 5421static void 5422sctp_select_primary_destination(struct sctp_tcb *stcb) 5423{ 5424 struct sctp_nets *net; 5425 5426 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5427 /* for now, we'll just pick the first reachable one we find */ 5428 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5429 continue; 5430 if (sctp_destination_is_reachable(stcb, 5431 (struct sockaddr *)&net->ro._l_addr)) { 5432 /* found a reachable destination */ 5433 stcb->asoc.primary_destination = net; 5434 } 5435 } 5436 /* I can't there from here! ...we're gonna die shortly... */ 5437} 5438 5439 5440/* 5441 * Delete the address from the endpoint local address list. There is nothing 5442 * to be done if we are bound to all addresses 5443 */ 5444void 5445sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5446{ 5447 struct sctp_laddr *laddr; 5448 int fnd; 5449 5450 fnd = 0; 5451 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5452 /* You are already bound to all. You have it already */ 5453 return; 5454 } 5455 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5456 if (laddr->ifa == ifa) { 5457 fnd = 1; 5458 break; 5459 } 5460 } 5461 if (fnd && (inp->laddr_count < 2)) { 5462 /* can't delete unless there are at LEAST 2 addresses */ 5463 return; 5464 } 5465 if (fnd) { 5466 /* 5467 * clean up any use of this address go through our 5468 * associations and clear any last_used_address that match 5469 * this one for each assoc, see if a new primary_destination 5470 * is needed 5471 */ 5472 struct sctp_tcb *stcb; 5473 5474 /* clean up "next_addr_touse" */ 5475 if (inp->next_addr_touse == laddr) 5476 /* delete this address */ 5477 inp->next_addr_touse = NULL; 5478 5479 /* clean up "last_used_address" */ 5480 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5481 struct sctp_nets *net; 5482 5483 SCTP_TCB_LOCK(stcb); 5484 if (stcb->asoc.last_used_address == laddr) 5485 /* delete this address */ 5486 stcb->asoc.last_used_address = NULL; 5487 /* 5488 * Now spin through all the nets and purge any ref 5489 * to laddr 5490 */ 5491 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5492 if (net->ro._s_addr == laddr->ifa) { 5493 /* Yep, purge src address selected */ 5494 sctp_rtentry_t *rt; 5495 5496 /* delete this address if cached */ 5497 rt = net->ro.ro_rt; 5498 if (rt != NULL) { 5499 RTFREE(rt); 5500 net->ro.ro_rt = NULL; 5501 } 5502 sctp_free_ifa(net->ro._s_addr); 5503 net->ro._s_addr = NULL; 5504 net->src_addr_selected = 0; 5505 } 5506 } 5507 SCTP_TCB_UNLOCK(stcb); 5508 } /* for each tcb */ 5509 /* remove it from the ep list */ 5510 sctp_remove_laddr(laddr); 5511 inp->laddr_count--; 5512 /* update inp_vflag flags */ 5513 sctp_update_ep_vflag(inp); 5514 } 5515 return; 5516} 5517 5518/* 5519 * Add the address to the TCB local address restricted list. 5520 * This is a "pending" address list (eg. addresses waiting for an 5521 * ASCONF-ACK response) and cannot be used as a valid source address. 5522 */ 5523void 5524sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5525{ 5526 struct sctp_laddr *laddr; 5527 struct sctpladdr *list; 5528 5529 /* 5530 * Assumes TCB is locked.. and possibly the INP. May need to 5531 * confirm/fix that if we need it and is not the case. 5532 */ 5533 list = &stcb->asoc.sctp_restricted_addrs; 5534 5535#ifdef INET6 5536 if (ifa->address.sa.sa_family == AF_INET6) { 5537 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5538 /* Can't bind a non-existent addr. */ 5539 return; 5540 } 5541 } 5542#endif 5543 /* does the address already exist? */ 5544 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5545 if (laddr->ifa == ifa) { 5546 return; 5547 } 5548 } 5549 5550 /* add to the list */ 5551 (void)sctp_insert_laddr(list, ifa, 0); 5552 return; 5553} 5554 5555/* 5556 * Remove a local address from the TCB local address restricted list 5557 */ 5558void 5559sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5560{ 5561 struct sctp_inpcb *inp; 5562 struct sctp_laddr *laddr; 5563 5564 /* 5565 * This is called by asconf work. It is assumed that a) The TCB is 5566 * locked and b) The INP is locked. This is true in as much as I can 5567 * trace through the entry asconf code where I did these locks. 5568 * Again, the ASCONF code is a bit different in that it does lock 5569 * the INP during its work often times. This must be since we don't 5570 * want other proc's looking up things while what they are looking 5571 * up is changing :-D 5572 */ 5573 5574 inp = stcb->sctp_ep; 5575 /* if subset bound and don't allow ASCONF's, can't delete last */ 5576 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5577 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5578 if (stcb->sctp_ep->laddr_count < 2) { 5579 /* can't delete last address */ 5580 return; 5581 } 5582 } 5583 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5584 /* remove the address if it exists */ 5585 if (laddr->ifa == NULL) 5586 continue; 5587 if (laddr->ifa == ifa) { 5588 sctp_remove_laddr(laddr); 5589 return; 5590 } 5591 } 5592 5593 /* address not found! */ 5594 return; 5595} 5596 5597/* 5598 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5599 */ 5600/* sysctl */ 5601static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5602static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5603 5604 5605 5606#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5607struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5608int *sctp_cpuarry = NULL; 5609void 5610sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5611{ 5612 /* Queue a packet to a processor for the specified core */ 5613 struct sctp_mcore_queue *qent; 5614 struct sctp_mcore_ctrl *wkq; 5615 int need_wake = 0; 5616 5617 if (sctp_mcore_workers == NULL) { 5618 /* Something went way bad during setup */ 5619 sctp_input_with_port(m, off, 0); 5620 return; 5621 } 5622 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5623 (sizeof(struct sctp_mcore_queue)), 5624 SCTP_M_MCORE); 5625 if (qent == NULL) { 5626 /* This is trouble */ 5627 sctp_input_with_port(m, off, 0); 5628 return; 5629 } 5630 qent->vn = curvnet; 5631 qent->m = m; 5632 qent->off = off; 5633 qent->v6 = 0; 5634 wkq = &sctp_mcore_workers[cpu_to_use]; 5635 SCTP_MCORE_QLOCK(wkq); 5636 5637 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5638 if (wkq->running == 0) { 5639 need_wake = 1; 5640 } 5641 SCTP_MCORE_QUNLOCK(wkq); 5642 if (need_wake) { 5643 wakeup(&wkq->running); 5644 } 5645} 5646 5647static void 5648sctp_mcore_thread(void *arg) 5649{ 5650 5651 struct sctp_mcore_ctrl *wkq; 5652 struct sctp_mcore_queue *qent; 5653 5654 wkq = (struct sctp_mcore_ctrl *)arg; 5655 struct mbuf *m; 5656 int off, v6; 5657 5658 /* Wait for first tickle */ 5659 SCTP_MCORE_LOCK(wkq); 5660 wkq->running = 0; 5661 msleep(&wkq->running, 5662 &wkq->core_mtx, 5663 0, "wait for pkt", 0); 5664 SCTP_MCORE_UNLOCK(wkq); 5665 5666 /* Bind to our cpu */ 5667 thread_lock(curthread); 5668 sched_bind(curthread, wkq->cpuid); 5669 thread_unlock(curthread); 5670 5671 /* Now lets start working */ 5672 SCTP_MCORE_LOCK(wkq); 5673 /* Now grab lock and go */ 5674 for (;;) { 5675 SCTP_MCORE_QLOCK(wkq); 5676skip_sleep: 5677 wkq->running = 1; 5678 qent = TAILQ_FIRST(&wkq->que); 5679 if (qent) { 5680 TAILQ_REMOVE(&wkq->que, qent, next); 5681 SCTP_MCORE_QUNLOCK(wkq); 5682 CURVNET_SET(qent->vn); 5683 m = qent->m; 5684 off = qent->off; 5685 v6 = qent->v6; 5686 SCTP_FREE(qent, SCTP_M_MCORE); 5687 if (v6 == 0) { 5688 sctp_input_with_port(m, off, 0); 5689 } else { 5690 SCTP_PRINTF("V6 not yet supported\n"); 5691 sctp_m_freem(m); 5692 } 5693 CURVNET_RESTORE(); 5694 SCTP_MCORE_QLOCK(wkq); 5695 } 5696 wkq->running = 0; 5697 if (!TAILQ_EMPTY(&wkq->que)) { 5698 goto skip_sleep; 5699 } 5700 SCTP_MCORE_QUNLOCK(wkq); 5701 msleep(&wkq->running, 5702 &wkq->core_mtx, 5703 0, "wait for pkt", 0); 5704 } 5705} 5706 5707static void 5708sctp_startup_mcore_threads(void) 5709{ 5710 int i, cpu; 5711 5712 if (mp_ncpus == 1) 5713 return; 5714 5715 if (sctp_mcore_workers != NULL) { 5716 /* 5717 * Already been here in some previous vnet? 5718 */ 5719 return; 5720 } 5721 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5722 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5723 SCTP_M_MCORE); 5724 if (sctp_mcore_workers == NULL) { 5725 /* TSNH I hope */ 5726 return; 5727 } 5728 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5729 sizeof(struct sctp_mcore_ctrl))); 5730 /* Init the structures */ 5731 for (i = 0; i <= mp_maxid; i++) { 5732 TAILQ_INIT(&sctp_mcore_workers[i].que); 5733 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5734 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5735 sctp_mcore_workers[i].cpuid = i; 5736 } 5737 if (sctp_cpuarry == NULL) { 5738 SCTP_MALLOC(sctp_cpuarry, int *, 5739 (mp_ncpus * sizeof(int)), 5740 SCTP_M_MCORE); 5741 i = 0; 5742 CPU_FOREACH(cpu) { 5743 sctp_cpuarry[i] = cpu; 5744 i++; 5745 } 5746 } 5747 /* Now start them all */ 5748 CPU_FOREACH(cpu) { 5749 (void)kproc_create(sctp_mcore_thread, 5750 (void *)&sctp_mcore_workers[cpu], 5751 &sctp_mcore_workers[cpu].thread_proc, 5752 RFPROC, 5753 SCTP_KTHREAD_PAGES, 5754 SCTP_MCORE_NAME); 5755 5756 } 5757} 5758 5759#endif 5760 5761void 5762sctp_pcb_init() 5763{ 5764 /* 5765 * SCTP initialization for the PCB structures should be called by 5766 * the sctp_init() function. 5767 */ 5768 int i; 5769 struct timeval tv; 5770 5771 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5772 /* error I was called twice */ 5773 return; 5774 } 5775 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5776 5777#if defined(SCTP_LOCAL_TRACE_BUF) 5778 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5779#endif 5780#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5781 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5782 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5783 SCTP_M_MCORE); 5784#endif 5785 (void)SCTP_GETTIME_TIMEVAL(&tv); 5786#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5787 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5788 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5789 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5790#else 5791 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5792 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5793 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5794#endif 5795 /* init the empty list of (All) Endpoints */ 5796 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5797 5798 5799 /* init the hash table of endpoints */ 5800 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5801 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5802 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5803 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5804 &SCTP_BASE_INFO(hashasocmark)); 5805 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5806 &SCTP_BASE_INFO(hashmark)); 5807 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5808 &SCTP_BASE_INFO(hashtcpmark)); 5809 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5810 5811 5812 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5813 &SCTP_BASE_INFO(hashvrfmark)); 5814 5815 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5816 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5817 /* init the zones */ 5818 /* 5819 * FIX ME: Should check for NULL returns, but if it does fail we are 5820 * doomed to panic anyways... add later maybe. 5821 */ 5822 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5823 sizeof(struct sctp_inpcb), maxsockets); 5824 5825 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5826 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5827 5828 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5829 sizeof(struct sctp_laddr), 5830 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5831 5832 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5833 sizeof(struct sctp_nets), 5834 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5835 5836 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5837 sizeof(struct sctp_tmit_chunk), 5838 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5839 5840 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5841 sizeof(struct sctp_queued_to_read), 5842 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5843 5844 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5845 sizeof(struct sctp_stream_queue_pending), 5846 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5847 5848 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5849 sizeof(struct sctp_asconf), 5850 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5851 5852 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5853 sizeof(struct sctp_asconf_ack), 5854 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5855 5856 5857 /* Master Lock INIT for info structure */ 5858 SCTP_INP_INFO_LOCK_INIT(); 5859 SCTP_STATLOG_INIT_LOCK(); 5860 5861 SCTP_IPI_COUNT_INIT(); 5862 SCTP_IPI_ADDR_INIT(); 5863#ifdef SCTP_PACKET_LOGGING 5864 SCTP_IP_PKTLOG_INIT(); 5865#endif 5866 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5867 5868 SCTP_WQ_ADDR_INIT(); 5869 /* not sure if we need all the counts */ 5870 SCTP_BASE_INFO(ipi_count_ep) = 0; 5871 /* assoc/tcb zone info */ 5872 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5873 /* local addrlist zone info */ 5874 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5875 /* remote addrlist zone info */ 5876 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5877 /* chunk info */ 5878 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5879 5880 /* socket queue zone info */ 5881 SCTP_BASE_INFO(ipi_count_readq) = 0; 5882 5883 /* stream out queue cont */ 5884 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5885 5886 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5887 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5888 5889 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5890 5891 /* Init the TIMEWAIT list */ 5892 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5893 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5894 } 5895 sctp_startup_iterator(); 5896 5897#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5898 sctp_startup_mcore_threads(); 5899#endif 5900 5901 /* 5902 * INIT the default VRF which for BSD is the only one, other O/S's 5903 * may have more. But initially they must start with one and then 5904 * add the VRF's as addresses are added. 5905 */ 5906 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5907} 5908 5909/* 5910 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5911 */ 5912void 5913sctp_pcb_finish(void) 5914{ 5915 struct sctp_vrflist *vrf_bucket; 5916 struct sctp_vrf *vrf, *nvrf; 5917 struct sctp_ifn *ifn, *nifn; 5918 struct sctp_ifa *ifa, *nifa; 5919 struct sctpvtaghead *chain; 5920 struct sctp_tagblock *twait_block, *prev_twait_block; 5921 struct sctp_laddr *wi, *nwi; 5922 int i; 5923 struct sctp_iterator *it, *nit; 5924 5925 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5926 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5927 return; 5928 } 5929 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5930 /* 5931 * In FreeBSD the iterator thread never exits but we do clean up. 5932 * The only way FreeBSD reaches here is if we have VRF's but we 5933 * still add the ifdef to make it compile on old versions. 5934 */ 5935retry: 5936 SCTP_IPI_ITERATOR_WQ_LOCK(); 5937 /* 5938 * sctp_iterator_worker() might be working on an it entry without 5939 * holding the lock. We won't find it on the list either and 5940 * continue and free/destroy it. While holding the lock, spin, to 5941 * avoid the race condition as sctp_iterator_worker() will have to 5942 * wait to re-aquire the lock. 5943 */ 5944 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5945 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5946 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5947 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5948 DELAY(10); 5949 goto retry; 5950 } 5951 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5952 if (it->vn != curvnet) { 5953 continue; 5954 } 5955 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5956 if (it->function_atend != NULL) { 5957 (*it->function_atend) (it->pointer, it->val); 5958 } 5959 SCTP_FREE(it, SCTP_M_ITER); 5960 } 5961 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5962 SCTP_ITERATOR_LOCK(); 5963 if ((sctp_it_ctl.cur_it) && 5964 (sctp_it_ctl.cur_it->vn == curvnet)) { 5965 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5966 } 5967 SCTP_ITERATOR_UNLOCK(); 5968 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5969 SCTP_WQ_ADDR_LOCK(); 5970 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5971 LIST_REMOVE(wi, sctp_nxt_addr); 5972 SCTP_DECR_LADDR_COUNT(); 5973 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5974 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5975 } 5976 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5977 } 5978 SCTP_WQ_ADDR_UNLOCK(); 5979 5980 /* 5981 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5982 * destroyed first). 5983 */ 5984 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5985 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5986 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5987 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5988 /* free the ifa */ 5989 LIST_REMOVE(ifa, next_bucket); 5990 LIST_REMOVE(ifa, next_ifa); 5991 SCTP_FREE(ifa, SCTP_M_IFA); 5992 } 5993 /* free the ifn */ 5994 LIST_REMOVE(ifn, next_bucket); 5995 LIST_REMOVE(ifn, next_ifn); 5996 SCTP_FREE(ifn, SCTP_M_IFN); 5997 } 5998 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5999 /* free the vrf */ 6000 LIST_REMOVE(vrf, next_vrf); 6001 SCTP_FREE(vrf, SCTP_M_VRF); 6002 } 6003 /* free the vrf hashes */ 6004 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6005 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6006 6007 /* 6008 * free the TIMEWAIT list elements malloc'd in the function 6009 * sctp_add_vtag_to_timewait()... 6010 */ 6011 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6012 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6013 if (!LIST_EMPTY(chain)) { 6014 prev_twait_block = NULL; 6015 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6016 if (prev_twait_block) { 6017 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6018 } 6019 prev_twait_block = twait_block; 6020 } 6021 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6022 } 6023 } 6024 6025 /* free the locks and mutexes */ 6026#ifdef SCTP_PACKET_LOGGING 6027 SCTP_IP_PKTLOG_DESTROY(); 6028#endif 6029 SCTP_IPI_ADDR_DESTROY(); 6030 SCTP_STATLOG_DESTROY(); 6031 SCTP_INP_INFO_LOCK_DESTROY(); 6032 6033 SCTP_WQ_ADDR_DESTROY(); 6034 6035 /* Get rid of other stuff too. */ 6036 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6037 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6038 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6039 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6040 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6041 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6042 6043 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6044 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6045 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6046 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6047 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6048 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6049 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6050 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6051 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6052#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6053 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6054#endif 6055} 6056 6057 6058int 6059sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6060 int offset, int limit, 6061 struct sockaddr *src, struct sockaddr *dst, 6062 struct sockaddr *altsa, uint16_t port) 6063{ 6064 /* 6065 * grub through the INIT pulling addresses and loading them to the 6066 * nets structure in the asoc. The from address in the mbuf should 6067 * also be loaded (if it is not already). This routine can be called 6068 * with either INIT or INIT-ACK's as long as the m points to the IP 6069 * packet and the offset points to the beginning of the parameters. 6070 */ 6071 struct sctp_inpcb *inp; 6072 struct sctp_nets *net, *nnet, *net_tmp; 6073 struct sctp_paramhdr *phdr, parm_buf; 6074 struct sctp_tcb *stcb_tmp; 6075 uint16_t ptype, plen; 6076 struct sockaddr *sa; 6077 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6078 struct sctp_auth_random *p_random = NULL; 6079 uint16_t random_len = 0; 6080 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6081 struct sctp_auth_hmac_algo *hmacs = NULL; 6082 uint16_t hmacs_len = 0; 6083 uint8_t saw_asconf = 0; 6084 uint8_t saw_asconf_ack = 0; 6085 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6086 struct sctp_auth_chunk_list *chunks = NULL; 6087 uint16_t num_chunks = 0; 6088 sctp_key_t *new_key; 6089 uint32_t keylen; 6090 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6091 uint8_t peer_supports_ecn; 6092 uint8_t peer_supports_prsctp; 6093 uint8_t peer_supports_auth; 6094 uint8_t peer_supports_asconf; 6095 uint8_t peer_supports_asconf_ack; 6096 uint8_t peer_supports_reconfig; 6097 uint8_t peer_supports_nrsack; 6098 uint8_t peer_supports_pktdrop; 6099 uint8_t peer_supports_idata; 6100 6101#ifdef INET 6102 struct sockaddr_in sin; 6103 6104#endif 6105#ifdef INET6 6106 struct sockaddr_in6 sin6; 6107 6108#endif 6109 6110 /* First get the destination address setup too. */ 6111#ifdef INET 6112 memset(&sin, 0, sizeof(sin)); 6113 sin.sin_family = AF_INET; 6114 sin.sin_len = sizeof(sin); 6115 sin.sin_port = stcb->rport; 6116#endif 6117#ifdef INET6 6118 memset(&sin6, 0, sizeof(sin6)); 6119 sin6.sin6_family = AF_INET6; 6120 sin6.sin6_len = sizeof(struct sockaddr_in6); 6121 sin6.sin6_port = stcb->rport; 6122#endif 6123 if (altsa) { 6124 sa = altsa; 6125 } else { 6126 sa = src; 6127 } 6128 peer_supports_idata = 0; 6129 peer_supports_ecn = 0; 6130 peer_supports_prsctp = 0; 6131 peer_supports_auth = 0; 6132 peer_supports_asconf = 0; 6133 peer_supports_reconfig = 0; 6134 peer_supports_nrsack = 0; 6135 peer_supports_pktdrop = 0; 6136 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6137 /* mark all addresses that we have currently on the list */ 6138 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6139 } 6140 /* does the source address already exist? if so skip it */ 6141 inp = stcb->sctp_ep; 6142 atomic_add_int(&stcb->asoc.refcnt, 1); 6143 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6144 atomic_add_int(&stcb->asoc.refcnt, -1); 6145 6146 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6147 /* we must add the source address */ 6148 /* no scope set here since we have a tcb already. */ 6149 switch (sa->sa_family) { 6150#ifdef INET 6151 case AF_INET: 6152 if (stcb->asoc.scope.ipv4_addr_legal) { 6153 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6154 return (-1); 6155 } 6156 } 6157 break; 6158#endif 6159#ifdef INET6 6160 case AF_INET6: 6161 if (stcb->asoc.scope.ipv6_addr_legal) { 6162 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6163 return (-2); 6164 } 6165 } 6166 break; 6167#endif 6168 default: 6169 break; 6170 } 6171 } else { 6172 if (net_tmp != NULL && stcb_tmp == stcb) { 6173 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6174 } else if (stcb_tmp != stcb) { 6175 /* It belongs to another association? */ 6176 if (stcb_tmp) 6177 SCTP_TCB_UNLOCK(stcb_tmp); 6178 return (-3); 6179 } 6180 } 6181 if (stcb->asoc.state == 0) { 6182 /* the assoc was freed? */ 6183 return (-4); 6184 } 6185 /* now we must go through each of the params. */ 6186 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6187 while (phdr) { 6188 ptype = ntohs(phdr->param_type); 6189 plen = ntohs(phdr->param_length); 6190 /* 6191 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6192 * (uint32_t)ptype, (int)plen); 6193 */ 6194 if (offset + plen > limit) { 6195 break; 6196 } 6197 if (plen == 0) { 6198 break; 6199 } 6200#ifdef INET 6201 if (ptype == SCTP_IPV4_ADDRESS) { 6202 if (stcb->asoc.scope.ipv4_addr_legal) { 6203 struct sctp_ipv4addr_param *p4, p4_buf; 6204 6205 /* ok get the v4 address and check/add */ 6206 phdr = sctp_get_next_param(m, offset, 6207 (struct sctp_paramhdr *)&p4_buf, 6208 sizeof(p4_buf)); 6209 if (plen != sizeof(struct sctp_ipv4addr_param) || 6210 phdr == NULL) { 6211 return (-5); 6212 } 6213 p4 = (struct sctp_ipv4addr_param *)phdr; 6214 sin.sin_addr.s_addr = p4->addr; 6215 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6216 /* Skip multi-cast addresses */ 6217 goto next_param; 6218 } 6219 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6220 (sin.sin_addr.s_addr == INADDR_ANY)) { 6221 goto next_param; 6222 } 6223 sa = (struct sockaddr *)&sin; 6224 inp = stcb->sctp_ep; 6225 atomic_add_int(&stcb->asoc.refcnt, 1); 6226 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6227 dst, stcb); 6228 atomic_add_int(&stcb->asoc.refcnt, -1); 6229 6230 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6231 inp == NULL) { 6232 /* we must add the source address */ 6233 /* 6234 * no scope set since we have a tcb 6235 * already 6236 */ 6237 6238 /* 6239 * we must validate the state again 6240 * here 6241 */ 6242 add_it_now: 6243 if (stcb->asoc.state == 0) { 6244 /* the assoc was freed? */ 6245 return (-7); 6246 } 6247 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6248 return (-8); 6249 } 6250 } else if (stcb_tmp == stcb) { 6251 if (stcb->asoc.state == 0) { 6252 /* the assoc was freed? */ 6253 return (-10); 6254 } 6255 if (net != NULL) { 6256 /* clear flag */ 6257 net->dest_state &= 6258 ~SCTP_ADDR_NOT_IN_ASSOC; 6259 } 6260 } else { 6261 /* 6262 * strange, address is in another 6263 * assoc? straighten out locks. 6264 */ 6265 if (stcb_tmp) { 6266 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6267 struct mbuf *op_err; 6268 char msg[SCTP_DIAG_INFO_LEN]; 6269 6270 /* 6271 * in setup state we 6272 * abort this guy 6273 */ 6274 snprintf(msg, sizeof(msg), 6275 "%s:%d at %s", __FILE__, __LINE__, __func__); 6276 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6277 msg); 6278 sctp_abort_an_association(stcb_tmp->sctp_ep, 6279 stcb_tmp, op_err, 6280 SCTP_SO_NOT_LOCKED); 6281 goto add_it_now; 6282 } 6283 SCTP_TCB_UNLOCK(stcb_tmp); 6284 } 6285 if (stcb->asoc.state == 0) { 6286 /* the assoc was freed? */ 6287 return (-12); 6288 } 6289 return (-13); 6290 } 6291 } 6292 } else 6293#endif 6294#ifdef INET6 6295 if (ptype == SCTP_IPV6_ADDRESS) { 6296 if (stcb->asoc.scope.ipv6_addr_legal) { 6297 /* ok get the v6 address and check/add */ 6298 struct sctp_ipv6addr_param *p6, p6_buf; 6299 6300 phdr = sctp_get_next_param(m, offset, 6301 (struct sctp_paramhdr *)&p6_buf, 6302 sizeof(p6_buf)); 6303 if (plen != sizeof(struct sctp_ipv6addr_param) || 6304 phdr == NULL) { 6305 return (-14); 6306 } 6307 p6 = (struct sctp_ipv6addr_param *)phdr; 6308 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6309 sizeof(p6->addr)); 6310 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6311 /* Skip multi-cast addresses */ 6312 goto next_param; 6313 } 6314 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6315 /* 6316 * Link local make no sense without 6317 * scope 6318 */ 6319 goto next_param; 6320 } 6321 sa = (struct sockaddr *)&sin6; 6322 inp = stcb->sctp_ep; 6323 atomic_add_int(&stcb->asoc.refcnt, 1); 6324 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6325 dst, stcb); 6326 atomic_add_int(&stcb->asoc.refcnt, -1); 6327 if (stcb_tmp == NULL && 6328 (inp == stcb->sctp_ep || inp == NULL)) { 6329 /* 6330 * we must validate the state again 6331 * here 6332 */ 6333 add_it_now6: 6334 if (stcb->asoc.state == 0) { 6335 /* the assoc was freed? */ 6336 return (-16); 6337 } 6338 /* 6339 * we must add the address, no scope 6340 * set 6341 */ 6342 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6343 return (-17); 6344 } 6345 } else if (stcb_tmp == stcb) { 6346 /* 6347 * we must validate the state again 6348 * here 6349 */ 6350 if (stcb->asoc.state == 0) { 6351 /* the assoc was freed? */ 6352 return (-19); 6353 } 6354 if (net != NULL) { 6355 /* clear flag */ 6356 net->dest_state &= 6357 ~SCTP_ADDR_NOT_IN_ASSOC; 6358 } 6359 } else { 6360 /* 6361 * strange, address is in another 6362 * assoc? straighten out locks. 6363 */ 6364 if (stcb_tmp) { 6365 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6366 struct mbuf *op_err; 6367 char msg[SCTP_DIAG_INFO_LEN]; 6368 6369 /* 6370 * in setup state we 6371 * abort this guy 6372 */ 6373 snprintf(msg, sizeof(msg), 6374 "%s:%d at %s", __FILE__, __LINE__, __func__); 6375 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6376 msg); 6377 sctp_abort_an_association(stcb_tmp->sctp_ep, 6378 stcb_tmp, op_err, 6379 SCTP_SO_NOT_LOCKED); 6380 goto add_it_now6; 6381 } 6382 SCTP_TCB_UNLOCK(stcb_tmp); 6383 } 6384 if (stcb->asoc.state == 0) { 6385 /* the assoc was freed? */ 6386 return (-21); 6387 } 6388 return (-22); 6389 } 6390 } 6391 } else 6392#endif 6393 if (ptype == SCTP_ECN_CAPABLE) { 6394 peer_supports_ecn = 1; 6395 } else if (ptype == SCTP_ULP_ADAPTATION) { 6396 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6397 struct sctp_adaptation_layer_indication ai, 6398 *aip; 6399 6400 phdr = sctp_get_next_param(m, offset, 6401 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6402 aip = (struct sctp_adaptation_layer_indication *)phdr; 6403 if (aip) { 6404 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6405 stcb->asoc.adaptation_needed = 1; 6406 } 6407 } 6408 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6409 struct sctp_asconf_addr_param lstore, *fee; 6410 int lptype; 6411 struct sockaddr *lsa = NULL; 6412 6413#ifdef INET 6414 struct sctp_asconf_addrv4_param *fii; 6415 6416#endif 6417 6418 if (stcb->asoc.asconf_supported == 0) { 6419 return (-100); 6420 } 6421 if (plen > sizeof(lstore)) { 6422 return (-23); 6423 } 6424 phdr = sctp_get_next_param(m, offset, 6425 (struct sctp_paramhdr *)&lstore, 6426 min(plen, sizeof(lstore))); 6427 if (phdr == NULL) { 6428 return (-24); 6429 } 6430 fee = (struct sctp_asconf_addr_param *)phdr; 6431 lptype = ntohs(fee->addrp.ph.param_type); 6432 switch (lptype) { 6433#ifdef INET 6434 case SCTP_IPV4_ADDRESS: 6435 if (plen != 6436 sizeof(struct sctp_asconf_addrv4_param)) { 6437 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6438 (int)sizeof(struct sctp_asconf_addrv4_param), 6439 plen); 6440 } else { 6441 fii = (struct sctp_asconf_addrv4_param *)fee; 6442 sin.sin_addr.s_addr = fii->addrp.addr; 6443 lsa = (struct sockaddr *)&sin; 6444 } 6445 break; 6446#endif 6447#ifdef INET6 6448 case SCTP_IPV6_ADDRESS: 6449 if (plen != 6450 sizeof(struct sctp_asconf_addr_param)) { 6451 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6452 (int)sizeof(struct sctp_asconf_addr_param), 6453 plen); 6454 } else { 6455 memcpy(sin6.sin6_addr.s6_addr, 6456 fee->addrp.addr, 6457 sizeof(fee->addrp.addr)); 6458 lsa = (struct sockaddr *)&sin6; 6459 } 6460 break; 6461#endif 6462 default: 6463 break; 6464 } 6465 if (lsa) { 6466 (void)sctp_set_primary_addr(stcb, sa, NULL); 6467 } 6468 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6469 stcb->asoc.peer_supports_nat = 1; 6470 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6471 /* Peer supports pr-sctp */ 6472 peer_supports_prsctp = 1; 6473 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6474 /* A supported extension chunk */ 6475 struct sctp_supported_chunk_types_param *pr_supported; 6476 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6477 int num_ent, i; 6478 6479 phdr = sctp_get_next_param(m, offset, 6480 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6481 if (phdr == NULL) { 6482 return (-25); 6483 } 6484 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6485 num_ent = plen - sizeof(struct sctp_paramhdr); 6486 for (i = 0; i < num_ent; i++) { 6487 switch (pr_supported->chunk_types[i]) { 6488 case SCTP_ASCONF: 6489 peer_supports_asconf = 1; 6490 break; 6491 case SCTP_ASCONF_ACK: 6492 peer_supports_asconf_ack = 1; 6493 break; 6494 case SCTP_FORWARD_CUM_TSN: 6495 peer_supports_prsctp = 1; 6496 break; 6497 case SCTP_PACKET_DROPPED: 6498 peer_supports_pktdrop = 1; 6499 break; 6500 case SCTP_NR_SELECTIVE_ACK: 6501 peer_supports_nrsack = 1; 6502 break; 6503 case SCTP_STREAM_RESET: 6504 peer_supports_reconfig = 1; 6505 break; 6506 case SCTP_AUTHENTICATION: 6507 peer_supports_auth = 1; 6508 break; 6509 case SCTP_IDATA: 6510 peer_supports_idata = 1; 6511 break; 6512 default: 6513 /* one I have not learned yet */ 6514 break; 6515 6516 } 6517 } 6518 } else if (ptype == SCTP_RANDOM) { 6519 if (plen > sizeof(random_store)) 6520 break; 6521 if (got_random) { 6522 /* already processed a RANDOM */ 6523 goto next_param; 6524 } 6525 phdr = sctp_get_next_param(m, offset, 6526 (struct sctp_paramhdr *)random_store, 6527 min(sizeof(random_store), plen)); 6528 if (phdr == NULL) 6529 return (-26); 6530 p_random = (struct sctp_auth_random *)phdr; 6531 random_len = plen - sizeof(*p_random); 6532 /* enforce the random length */ 6533 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6534 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6535 return (-27); 6536 } 6537 got_random = 1; 6538 } else if (ptype == SCTP_HMAC_LIST) { 6539 uint16_t num_hmacs; 6540 uint16_t i; 6541 6542 if (plen > sizeof(hmacs_store)) 6543 break; 6544 if (got_hmacs) { 6545 /* already processed a HMAC list */ 6546 goto next_param; 6547 } 6548 phdr = sctp_get_next_param(m, offset, 6549 (struct sctp_paramhdr *)hmacs_store, 6550 min(plen, sizeof(hmacs_store))); 6551 if (phdr == NULL) 6552 return (-28); 6553 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6554 hmacs_len = plen - sizeof(*hmacs); 6555 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6556 /* validate the hmac list */ 6557 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6558 return (-29); 6559 } 6560 if (stcb->asoc.peer_hmacs != NULL) 6561 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6562 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6563 if (stcb->asoc.peer_hmacs != NULL) { 6564 for (i = 0; i < num_hmacs; i++) { 6565 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6566 ntohs(hmacs->hmac_ids[i])); 6567 } 6568 } 6569 got_hmacs = 1; 6570 } else if (ptype == SCTP_CHUNK_LIST) { 6571 int i; 6572 6573 if (plen > sizeof(chunks_store)) 6574 break; 6575 if (got_chklist) { 6576 /* already processed a Chunks list */ 6577 goto next_param; 6578 } 6579 phdr = sctp_get_next_param(m, offset, 6580 (struct sctp_paramhdr *)chunks_store, 6581 min(plen, sizeof(chunks_store))); 6582 if (phdr == NULL) 6583 return (-30); 6584 chunks = (struct sctp_auth_chunk_list *)phdr; 6585 num_chunks = plen - sizeof(*chunks); 6586 if (stcb->asoc.peer_auth_chunks != NULL) 6587 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6588 else 6589 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6590 for (i = 0; i < num_chunks; i++) { 6591 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6592 stcb->asoc.peer_auth_chunks); 6593 /* record asconf/asconf-ack if listed */ 6594 if (chunks->chunk_types[i] == SCTP_ASCONF) 6595 saw_asconf = 1; 6596 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6597 saw_asconf_ack = 1; 6598 6599 } 6600 got_chklist = 1; 6601 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6602 (ptype == SCTP_STATE_COOKIE) || 6603 (ptype == SCTP_UNRECOG_PARAM) || 6604 (ptype == SCTP_COOKIE_PRESERVE) || 6605 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6606 (ptype == SCTP_ADD_IP_ADDRESS) || 6607 (ptype == SCTP_DEL_IP_ADDRESS) || 6608 (ptype == SCTP_ERROR_CAUSE_IND) || 6609 (ptype == SCTP_SUCCESS_REPORT)) { 6610 /* don't care */ ; 6611 } else { 6612 if ((ptype & 0x8000) == 0x0000) { 6613 /* 6614 * must stop processing the rest of the 6615 * param's. Any report bits were handled 6616 * with the call to 6617 * sctp_arethere_unrecognized_parameters() 6618 * when the INIT or INIT-ACK was first seen. 6619 */ 6620 break; 6621 } 6622 } 6623 6624next_param: 6625 offset += SCTP_SIZE32(plen); 6626 if (offset >= limit) { 6627 break; 6628 } 6629 phdr = sctp_get_next_param(m, offset, &parm_buf, 6630 sizeof(parm_buf)); 6631 } 6632 /* Now check to see if we need to purge any addresses */ 6633 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6634 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6635 SCTP_ADDR_NOT_IN_ASSOC) { 6636 /* This address has been removed from the asoc */ 6637 /* remove and free it */ 6638 stcb->asoc.numnets--; 6639 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6640 sctp_free_remote_addr(net); 6641 if (net == stcb->asoc.primary_destination) { 6642 stcb->asoc.primary_destination = NULL; 6643 sctp_select_primary_destination(stcb); 6644 } 6645 } 6646 } 6647 if ((stcb->asoc.ecn_supported == 1) && 6648 (peer_supports_ecn == 0)) { 6649 stcb->asoc.ecn_supported = 0; 6650 } 6651 if ((stcb->asoc.prsctp_supported == 1) && 6652 (peer_supports_prsctp == 0)) { 6653 stcb->asoc.prsctp_supported = 0; 6654 } 6655 if ((stcb->asoc.auth_supported == 1) && 6656 ((peer_supports_auth == 0) || 6657 (got_random == 0) || (got_hmacs == 0))) { 6658 stcb->asoc.auth_supported = 0; 6659 } 6660 if ((stcb->asoc.asconf_supported == 1) && 6661 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6662 (stcb->asoc.auth_supported == 0) || 6663 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6664 stcb->asoc.asconf_supported = 0; 6665 } 6666 if ((stcb->asoc.reconfig_supported == 1) && 6667 (peer_supports_reconfig == 0)) { 6668 stcb->asoc.reconfig_supported = 0; 6669 } 6670 if ((stcb->asoc.idata_supported == 1) && 6671 (peer_supports_idata == 0)) { 6672 stcb->asoc.idata_supported = 0; 6673 } 6674 if ((stcb->asoc.nrsack_supported == 1) && 6675 (peer_supports_nrsack == 0)) { 6676 stcb->asoc.nrsack_supported = 0; 6677 } 6678 if ((stcb->asoc.pktdrop_supported == 1) && 6679 (peer_supports_pktdrop == 0)) { 6680 stcb->asoc.pktdrop_supported = 0; 6681 } 6682 /* validate authentication required parameters */ 6683 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6684 /* peer does not support auth but sent a chunks list? */ 6685 return (-31); 6686 } 6687 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6688 /* peer supports asconf but not auth? */ 6689 return (-32); 6690 } else if ((peer_supports_asconf == 1) && 6691 (peer_supports_auth == 1) && 6692 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6693 return (-33); 6694 } 6695 /* concatenate the full random key */ 6696 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6697 if (chunks != NULL) { 6698 keylen += sizeof(*chunks) + num_chunks; 6699 } 6700 new_key = sctp_alloc_key(keylen); 6701 if (new_key != NULL) { 6702 /* copy in the RANDOM */ 6703 if (p_random != NULL) { 6704 keylen = sizeof(*p_random) + random_len; 6705 bcopy(p_random, new_key->key, keylen); 6706 } 6707 /* append in the AUTH chunks */ 6708 if (chunks != NULL) { 6709 bcopy(chunks, new_key->key + keylen, 6710 sizeof(*chunks) + num_chunks); 6711 keylen += sizeof(*chunks) + num_chunks; 6712 } 6713 /* append in the HMACs */ 6714 if (hmacs != NULL) { 6715 bcopy(hmacs, new_key->key + keylen, 6716 sizeof(*hmacs) + hmacs_len); 6717 } 6718 } else { 6719 /* failed to get memory for the key */ 6720 return (-34); 6721 } 6722 if (stcb->asoc.authinfo.peer_random != NULL) 6723 sctp_free_key(stcb->asoc.authinfo.peer_random); 6724 stcb->asoc.authinfo.peer_random = new_key; 6725 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6726 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6727 6728 return (0); 6729} 6730 6731int 6732sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6733 struct sctp_nets *net) 6734{ 6735 /* make sure the requested primary address exists in the assoc */ 6736 if (net == NULL && sa) 6737 net = sctp_findnet(stcb, sa); 6738 6739 if (net == NULL) { 6740 /* didn't find the requested primary address! */ 6741 return (-1); 6742 } else { 6743 /* set the primary address */ 6744 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6745 /* Must be confirmed, so queue to set */ 6746 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6747 return (0); 6748 } 6749 stcb->asoc.primary_destination = net; 6750 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6751 sctp_free_remote_addr(stcb->asoc.alternate); 6752 stcb->asoc.alternate = NULL; 6753 } 6754 net = TAILQ_FIRST(&stcb->asoc.nets); 6755 if (net != stcb->asoc.primary_destination) { 6756 /* 6757 * first one on the list is NOT the primary 6758 * sctp_cmpaddr() is much more efficient if the 6759 * primary is the first on the list, make it so. 6760 */ 6761 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6762 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6763 } 6764 return (0); 6765 } 6766} 6767 6768int 6769sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6770{ 6771 /* 6772 * This function serves two purposes. It will see if a TAG can be 6773 * re-used and return 1 for yes it is ok and 0 for don't use that 6774 * tag. A secondary function it will do is purge out old tags that 6775 * can be removed. 6776 */ 6777 struct sctpvtaghead *chain; 6778 struct sctp_tagblock *twait_block; 6779 struct sctpasochead *head; 6780 struct sctp_tcb *stcb; 6781 int i; 6782 6783 SCTP_INP_INFO_RLOCK(); 6784 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6785 SCTP_BASE_INFO(hashasocmark))]; 6786 LIST_FOREACH(stcb, head, sctp_asocs) { 6787 /* 6788 * We choose not to lock anything here. TCB's can't be 6789 * removed since we have the read lock, so they can't be 6790 * freed on us, same thing for the INP. I may be wrong with 6791 * this assumption, but we will go with it for now :-) 6792 */ 6793 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6794 continue; 6795 } 6796 if (stcb->asoc.my_vtag == tag) { 6797 /* candidate */ 6798 if (stcb->rport != rport) { 6799 continue; 6800 } 6801 if (stcb->sctp_ep->sctp_lport != lport) { 6802 continue; 6803 } 6804 /* Its a used tag set */ 6805 SCTP_INP_INFO_RUNLOCK(); 6806 return (0); 6807 } 6808 } 6809 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6810 /* Now what about timed wait ? */ 6811 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6812 /* 6813 * Block(s) are present, lets see if we have this tag in the 6814 * list 6815 */ 6816 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6817 if (twait_block->vtag_block[i].v_tag == 0) { 6818 /* not used */ 6819 continue; 6820 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6821 now->tv_sec) { 6822 /* Audit expires this guy */ 6823 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6824 twait_block->vtag_block[i].v_tag = 0; 6825 twait_block->vtag_block[i].lport = 0; 6826 twait_block->vtag_block[i].rport = 0; 6827 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6828 (twait_block->vtag_block[i].lport == lport) && 6829 (twait_block->vtag_block[i].rport == rport)) { 6830 /* Bad tag, sorry :< */ 6831 SCTP_INP_INFO_RUNLOCK(); 6832 return (0); 6833 } 6834 } 6835 } 6836 SCTP_INP_INFO_RUNLOCK(); 6837 return (1); 6838} 6839 6840static void 6841sctp_drain_mbufs(struct sctp_tcb *stcb) 6842{ 6843 /* 6844 * We must hunt this association for MBUF's past the cumack (i.e. 6845 * out of order data that we can renege on). 6846 */ 6847 struct sctp_association *asoc; 6848 struct sctp_tmit_chunk *chk, *nchk; 6849 uint32_t cumulative_tsn_p1; 6850 struct sctp_queued_to_read *ctl, *nctl; 6851 int cnt, strmat; 6852 uint32_t gap, i; 6853 int fnd = 0; 6854 6855 /* We look for anything larger than the cum-ack + 1 */ 6856 6857 asoc = &stcb->asoc; 6858 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6859 /* none we can reneg on. */ 6860 return; 6861 } 6862 SCTP_STAT_INCR(sctps_protocol_drains_done); 6863 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6864 cnt = 0; 6865 /* Ok that was fun, now we will drain all the inbound streams? */ 6866 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6867 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next_instrm, nctl) { 6868#ifdef INVARIANTS 6869 if (ctl->on_strm_q != SCTP_ON_ORDERED) { 6870 panic("Huh control: %p on_q: %d -- not ordered?", 6871 ctl, ctl->on_strm_q); 6872 } 6873#endif 6874 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6875 /* Yep it is above cum-ack */ 6876 cnt++; 6877 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6878 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6879 sctp_ucount_decr(asoc->cnt_on_all_streams); 6880 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6881 if (ctl->on_read_q) { 6882 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next); 6883 ctl->on_read_q = 0; 6884 } 6885 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next_instrm); 6886 ctl->on_strm_q = 0; 6887 if (ctl->data) { 6888 sctp_m_freem(ctl->data); 6889 ctl->data = NULL; 6890 } 6891 sctp_free_remote_addr(ctl->whoFrom); 6892 /* Now its reasm? */ 6893 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 6894 cnt++; 6895 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6896 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6897 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6898 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6899 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 6900 if (chk->data) { 6901 sctp_m_freem(chk->data); 6902 chk->data = NULL; 6903 } 6904 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6905 } 6906 sctp_free_a_readq(stcb, ctl); 6907 } 6908 } 6909 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].uno_inqueue, next_instrm, nctl) { 6910#ifdef INVARIANTS 6911 if (ctl->on_strm_q != SCTP_ON_UNORDERED) { 6912 panic("Huh control: %p on_q: %d -- not unordered?", 6913 ctl, ctl->on_strm_q); 6914 } 6915#endif 6916 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6917 /* Yep it is above cum-ack */ 6918 cnt++; 6919 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6920 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6921 sctp_ucount_decr(asoc->cnt_on_all_streams); 6922 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6923 if (ctl->on_read_q) { 6924 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next); 6925 ctl->on_read_q = 0; 6926 } 6927 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, ctl, next_instrm); 6928 ctl->on_strm_q = 0; 6929 if (ctl->data) { 6930 sctp_m_freem(ctl->data); 6931 ctl->data = NULL; 6932 } 6933 sctp_free_remote_addr(ctl->whoFrom); 6934 /* Now its reasm? */ 6935 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) { 6936 cnt++; 6937 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6938 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6939 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6940 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6941 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next); 6942 if (chk->data) { 6943 sctp_m_freem(chk->data); 6944 chk->data = NULL; 6945 } 6946 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6947 } 6948 sctp_free_a_readq(stcb, ctl); 6949 } 6950 } 6951 } 6952 if (cnt) { 6953 /* We must back down to see what the new highest is */ 6954 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6955 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6956 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6957 asoc->highest_tsn_inside_map = i; 6958 fnd = 1; 6959 break; 6960 } 6961 } 6962 if (!fnd) { 6963 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6964 } 6965 /* 6966 * Question, should we go through the delivery queue? The 6967 * only reason things are on here is the app not reading OR 6968 * a p-d-api up. An attacker COULD send enough in to 6969 * initiate the PD-API and then send a bunch of stuff to 6970 * other streams... these would wind up on the delivery 6971 * queue.. and then we would not get to them. But in order 6972 * to do this I then have to back-track and un-deliver 6973 * sequence numbers in streams.. el-yucko. I think for now 6974 * we will NOT look at the delivery queue and leave it to be 6975 * something to consider later. An alternative would be to 6976 * abort the P-D-API with a notification and then deliver 6977 * the data.... Or another method might be to keep track of 6978 * how many times the situation occurs and if we see a 6979 * possible attack underway just abort the association. 6980 */ 6981#ifdef SCTP_DEBUG 6982 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6983#endif 6984 /* 6985 * Now do we need to find a new 6986 * asoc->highest_tsn_inside_map? 6987 */ 6988 asoc->last_revoke_count = cnt; 6989 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6990 /* sa_ignore NO_NULL_CHK */ 6991 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6992 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6993 } 6994 /* 6995 * Another issue, in un-setting the TSN's in the mapping array we 6996 * DID NOT adjust the highest_tsn marker. This will cause one of 6997 * two things to occur. It may cause us to do extra work in checking 6998 * for our mapping array movement. More importantly it may cause us 6999 * to SACK every datagram. This may not be a bad thing though since 7000 * we will recover once we get our cum-ack above and all this stuff 7001 * we dumped recovered. 7002 */ 7003} 7004 7005void 7006sctp_drain() 7007{ 7008 /* 7009 * We must walk the PCB lists for ALL associations here. The system 7010 * is LOW on MBUF's and needs help. This is where reneging will 7011 * occur. We really hope this does NOT happen! 7012 */ 7013 VNET_ITERATOR_DECL(vnet_iter); 7014 VNET_LIST_RLOCK_NOSLEEP(); 7015 VNET_FOREACH(vnet_iter) { 7016 CURVNET_SET(vnet_iter); 7017 struct sctp_inpcb *inp; 7018 struct sctp_tcb *stcb; 7019 7020 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7021 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7022#ifdef VIMAGE 7023 continue; 7024#else 7025 return; 7026#endif 7027 } 7028 SCTP_INP_INFO_RLOCK(); 7029 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7030 /* For each endpoint */ 7031 SCTP_INP_RLOCK(inp); 7032 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7033 /* For each association */ 7034 SCTP_TCB_LOCK(stcb); 7035 sctp_drain_mbufs(stcb); 7036 SCTP_TCB_UNLOCK(stcb); 7037 } 7038 SCTP_INP_RUNLOCK(inp); 7039 } 7040 SCTP_INP_INFO_RUNLOCK(); 7041 CURVNET_RESTORE(); 7042 } 7043 VNET_LIST_RUNLOCK_NOSLEEP(); 7044} 7045 7046/* 7047 * start a new iterator 7048 * iterates through all endpoints and associations based on the pcb_state 7049 * flags and asoc_state. "af" (mandatory) is executed for all matching 7050 * assocs and "ef" (optional) is executed when the iterator completes. 7051 * "inpf" (optional) is executed for each new endpoint as it is being 7052 * iterated through. inpe (optional) is called when the inp completes 7053 * its way through all the stcbs. 7054 */ 7055int 7056sctp_initiate_iterator(inp_func inpf, 7057 asoc_func af, 7058 inp_func inpe, 7059 uint32_t pcb_state, 7060 uint32_t pcb_features, 7061 uint32_t asoc_state, 7062 void *argp, 7063 uint32_t argi, 7064 end_func ef, 7065 struct sctp_inpcb *s_inp, 7066 uint8_t chunk_output_off) 7067{ 7068 struct sctp_iterator *it = NULL; 7069 7070 if (af == NULL) { 7071 return (-1); 7072 } 7073 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7074 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7075 SCTP_BASE_VAR(sctp_pcb_initialized)); 7076 return (-1); 7077 } 7078 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7079 SCTP_M_ITER); 7080 if (it == NULL) { 7081 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7082 return (ENOMEM); 7083 } 7084 memset(it, 0, sizeof(*it)); 7085 it->function_assoc = af; 7086 it->function_inp = inpf; 7087 if (inpf) 7088 it->done_current_ep = 0; 7089 else 7090 it->done_current_ep = 1; 7091 it->function_atend = ef; 7092 it->pointer = argp; 7093 it->val = argi; 7094 it->pcb_flags = pcb_state; 7095 it->pcb_features = pcb_features; 7096 it->asoc_state = asoc_state; 7097 it->function_inp_end = inpe; 7098 it->no_chunk_output = chunk_output_off; 7099 it->vn = curvnet; 7100 if (s_inp) { 7101 /* Assume lock is held here */ 7102 it->inp = s_inp; 7103 SCTP_INP_INCR_REF(it->inp); 7104 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7105 } else { 7106 SCTP_INP_INFO_RLOCK(); 7107 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7108 if (it->inp) { 7109 SCTP_INP_INCR_REF(it->inp); 7110 } 7111 SCTP_INP_INFO_RUNLOCK(); 7112 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7113 7114 } 7115 SCTP_IPI_ITERATOR_WQ_LOCK(); 7116 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7117 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7118 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7119 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7120 SCTP_FREE(it, SCTP_M_ITER); 7121 return (-1); 7122 } 7123 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7124 if (sctp_it_ctl.iterator_running == 0) { 7125 sctp_wakeup_iterator(); 7126 } 7127 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7128 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7129 return (0); 7130} 7131