sctp_pcb.c revision 270350
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: stable/10/sys/netinet/sctp_pcb.c 270350 2014-08-22 19:37:50Z 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 unuseable\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 unuseable\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 = (struct sockaddr_in *)&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 = (struct sockaddr_in6 *)&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 = (struct sockaddr_in *)&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 = (struct sockaddr_in6 *)&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", __FUNCTION__); 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 if (head == NULL) { 1445 goto null_return; 1446 } 1447 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1448 if (stcb->rport != rport) { 1449 /* remote port does not match */ 1450 continue; 1451 } 1452 SCTP_TCB_LOCK(stcb); 1453 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1454 SCTP_TCB_UNLOCK(stcb); 1455 continue; 1456 } 1457 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1458 SCTP_TCB_UNLOCK(stcb); 1459 continue; 1460 } 1461 /* now look at the list of remote addresses */ 1462 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1463#ifdef INVARIANTS 1464 if (net == (TAILQ_NEXT(net, sctp_next))) { 1465 panic("Corrupt net list"); 1466 } 1467#endif 1468 if (net->ro._l_addr.sa.sa_family != 1469 remote->sa_family) { 1470 /* not the same family */ 1471 continue; 1472 } 1473 switch (remote->sa_family) { 1474#ifdef INET 1475 case AF_INET: 1476 { 1477 struct sockaddr_in *sin, 1478 *rsin; 1479 1480 sin = (struct sockaddr_in *) 1481 &net->ro._l_addr; 1482 rsin = (struct sockaddr_in *)remote; 1483 if (sin->sin_addr.s_addr == 1484 rsin->sin_addr.s_addr) { 1485 /* found it */ 1486 if (netp != NULL) { 1487 *netp = net; 1488 } 1489 if (locked_tcb == NULL) { 1490 SCTP_INP_DECR_REF(inp); 1491 } else if (locked_tcb != stcb) { 1492 SCTP_TCB_LOCK(locked_tcb); 1493 } 1494 if (locked_tcb) { 1495 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1496 } 1497 SCTP_INP_WUNLOCK(inp); 1498 SCTP_INP_INFO_RUNLOCK(); 1499 return (stcb); 1500 } 1501 break; 1502 } 1503#endif 1504#ifdef INET6 1505 case AF_INET6: 1506 { 1507 struct sockaddr_in6 *sin6, 1508 *rsin6; 1509 1510 sin6 = (struct sockaddr_in6 *) 1511 &net->ro._l_addr; 1512 rsin6 = (struct sockaddr_in6 *)remote; 1513 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1514 rsin6)) { 1515 /* found it */ 1516 if (netp != NULL) { 1517 *netp = net; 1518 } 1519 if (locked_tcb == NULL) { 1520 SCTP_INP_DECR_REF(inp); 1521 } else if (locked_tcb != stcb) { 1522 SCTP_TCB_LOCK(locked_tcb); 1523 } 1524 if (locked_tcb) { 1525 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1526 } 1527 SCTP_INP_WUNLOCK(inp); 1528 SCTP_INP_INFO_RUNLOCK(); 1529 return (stcb); 1530 } 1531 break; 1532 } 1533#endif 1534 default: 1535 /* TSNH */ 1536 break; 1537 } 1538 } 1539 SCTP_TCB_UNLOCK(stcb); 1540 } 1541 } 1542null_return: 1543 /* clean up for returning null */ 1544 if (locked_tcb) { 1545 SCTP_TCB_LOCK(locked_tcb); 1546 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1547 } 1548 SCTP_INP_WUNLOCK(inp); 1549 SCTP_INP_INFO_RUNLOCK(); 1550 /* not found */ 1551 return (NULL); 1552} 1553 1554 1555/* 1556 * Find an association for a specific endpoint using the association id given 1557 * out in the COMM_UP notification 1558 */ 1559struct sctp_tcb * 1560sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1561{ 1562 /* 1563 * Use my the assoc_id to find a endpoint 1564 */ 1565 struct sctpasochead *head; 1566 struct sctp_tcb *stcb; 1567 uint32_t id; 1568 1569 if (inp == NULL) { 1570 SCTP_PRINTF("TSNH ep_associd\n"); 1571 return (NULL); 1572 } 1573 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1574 SCTP_PRINTF("TSNH ep_associd0\n"); 1575 return (NULL); 1576 } 1577 id = (uint32_t) asoc_id; 1578 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1579 if (head == NULL) { 1580 /* invalid id TSNH */ 1581 SCTP_PRINTF("TSNH ep_associd1\n"); 1582 return (NULL); 1583 } 1584 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1585 if (stcb->asoc.assoc_id == id) { 1586 if (inp != stcb->sctp_ep) { 1587 /* 1588 * some other guy has the same id active (id 1589 * collision ??). 1590 */ 1591 SCTP_PRINTF("TSNH ep_associd2\n"); 1592 continue; 1593 } 1594 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1595 continue; 1596 } 1597 if (want_lock) { 1598 SCTP_TCB_LOCK(stcb); 1599 } 1600 return (stcb); 1601 } 1602 } 1603 return (NULL); 1604} 1605 1606 1607struct sctp_tcb * 1608sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1609{ 1610 struct sctp_tcb *stcb; 1611 1612 SCTP_INP_RLOCK(inp); 1613 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1614 SCTP_INP_RUNLOCK(inp); 1615 return (stcb); 1616} 1617 1618 1619/* 1620 * Endpoint probe expects that the INP_INFO is locked. 1621 */ 1622static struct sctp_inpcb * 1623sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1624 uint16_t lport, uint32_t vrf_id) 1625{ 1626 struct sctp_inpcb *inp; 1627 struct sctp_laddr *laddr; 1628 1629#ifdef INET 1630 struct sockaddr_in *sin; 1631 1632#endif 1633#ifdef INET6 1634 struct sockaddr_in6 *sin6; 1635 struct sockaddr_in6 *intf_addr6; 1636 1637#endif 1638 int fnd; 1639 1640#ifdef INET 1641 sin = NULL; 1642#endif 1643#ifdef INET6 1644 sin6 = NULL; 1645#endif 1646 switch (nam->sa_family) { 1647#ifdef INET 1648 case AF_INET: 1649 sin = (struct sockaddr_in *)nam; 1650 break; 1651#endif 1652#ifdef INET6 1653 case AF_INET6: 1654 sin6 = (struct sockaddr_in6 *)nam; 1655 break; 1656#endif 1657 default: 1658 /* unsupported family */ 1659 return (NULL); 1660 } 1661 1662 if (head == NULL) 1663 return (NULL); 1664 1665 LIST_FOREACH(inp, head, sctp_hash) { 1666 SCTP_INP_RLOCK(inp); 1667 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1668 SCTP_INP_RUNLOCK(inp); 1669 continue; 1670 } 1671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1672 (inp->sctp_lport == lport)) { 1673 /* got it */ 1674 switch (nam->sa_family) { 1675#ifdef INET 1676 case AF_INET: 1677 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1678 SCTP_IPV6_V6ONLY(inp)) { 1679 /* 1680 * IPv4 on a IPv6 socket with ONLY 1681 * IPv6 set 1682 */ 1683 SCTP_INP_RUNLOCK(inp); 1684 continue; 1685 } 1686 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1687 &sin->sin_addr) != 0) { 1688 SCTP_INP_RUNLOCK(inp); 1689 continue; 1690 } 1691 break; 1692#endif 1693#ifdef INET6 1694 case AF_INET6: 1695 /* 1696 * A V6 address and the endpoint is NOT 1697 * bound V6 1698 */ 1699 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1700 SCTP_INP_RUNLOCK(inp); 1701 continue; 1702 } 1703 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1704 &sin6->sin6_addr) != 0) { 1705 SCTP_INP_RUNLOCK(inp); 1706 continue; 1707 } 1708 break; 1709#endif 1710 default: 1711 break; 1712 } 1713 /* does a VRF id match? */ 1714 fnd = 0; 1715 if (inp->def_vrf_id == vrf_id) 1716 fnd = 1; 1717 1718 SCTP_INP_RUNLOCK(inp); 1719 if (!fnd) 1720 continue; 1721 return (inp); 1722 } 1723 SCTP_INP_RUNLOCK(inp); 1724 } 1725 switch (nam->sa_family) { 1726#ifdef INET 1727 case AF_INET: 1728 if (sin->sin_addr.s_addr == INADDR_ANY) { 1729 /* Can't hunt for one that has no address specified */ 1730 return (NULL); 1731 } 1732 break; 1733#endif 1734#ifdef INET6 1735 case AF_INET6: 1736 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1737 /* Can't hunt for one that has no address specified */ 1738 return (NULL); 1739 } 1740 break; 1741#endif 1742 default: 1743 break; 1744 } 1745 /* 1746 * ok, not bound to all so see if we can find a EP bound to this 1747 * address. 1748 */ 1749 LIST_FOREACH(inp, head, sctp_hash) { 1750 SCTP_INP_RLOCK(inp); 1751 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1752 SCTP_INP_RUNLOCK(inp); 1753 continue; 1754 } 1755 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1756 SCTP_INP_RUNLOCK(inp); 1757 continue; 1758 } 1759 /* 1760 * Ok this could be a likely candidate, look at all of its 1761 * addresses 1762 */ 1763 if (inp->sctp_lport != lport) { 1764 SCTP_INP_RUNLOCK(inp); 1765 continue; 1766 } 1767 /* does a VRF id match? */ 1768 fnd = 0; 1769 if (inp->def_vrf_id == vrf_id) 1770 fnd = 1; 1771 1772 if (!fnd) { 1773 SCTP_INP_RUNLOCK(inp); 1774 continue; 1775 } 1776 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1777 if (laddr->ifa == NULL) { 1778 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1779 __FUNCTION__); 1780 continue; 1781 } 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1783 (void *)laddr->ifa); 1784 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1785 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1786 continue; 1787 } 1788 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1789 /* possible, see if it matches */ 1790 switch (nam->sa_family) { 1791#ifdef INET 1792 case AF_INET: 1793 if (sin->sin_addr.s_addr == 1794 laddr->ifa->address.sin.sin_addr.s_addr) { 1795 SCTP_INP_RUNLOCK(inp); 1796 return (inp); 1797 } 1798 break; 1799#endif 1800#ifdef INET6 1801 case AF_INET6: 1802 intf_addr6 = &laddr->ifa->address.sin6; 1803 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1804 intf_addr6)) { 1805 SCTP_INP_RUNLOCK(inp); 1806 return (inp); 1807 } 1808 break; 1809#endif 1810 } 1811 } 1812 } 1813 SCTP_INP_RUNLOCK(inp); 1814 } 1815 return (NULL); 1816} 1817 1818 1819static struct sctp_inpcb * 1820sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1821{ 1822 struct sctppcbhead *head; 1823 struct sctp_inpcb *t_inp; 1824 int fnd; 1825 1826 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1827 SCTP_BASE_INFO(hashmark))]; 1828 LIST_FOREACH(t_inp, head, sctp_hash) { 1829 if (t_inp->sctp_lport != lport) { 1830 continue; 1831 } 1832 /* is it in the VRF in question */ 1833 fnd = 0; 1834 if (t_inp->def_vrf_id == vrf_id) 1835 fnd = 1; 1836 if (!fnd) 1837 continue; 1838 1839 /* This one is in use. */ 1840 /* check the v6/v4 binding issue */ 1841 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1842 SCTP_IPV6_V6ONLY(t_inp)) { 1843 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1844 /* collision in V6 space */ 1845 return (t_inp); 1846 } else { 1847 /* inp is BOUND_V4 no conflict */ 1848 continue; 1849 } 1850 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1851 /* t_inp is bound v4 and v6, conflict always */ 1852 return (t_inp); 1853 } else { 1854 /* t_inp is bound only V4 */ 1855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1856 SCTP_IPV6_V6ONLY(inp)) { 1857 /* no conflict */ 1858 continue; 1859 } 1860 /* else fall through to conflict */ 1861 } 1862 return (t_inp); 1863 } 1864 return (NULL); 1865} 1866 1867 1868int 1869sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1870{ 1871 /* For 1-2-1 with port reuse */ 1872 struct sctppcbhead *head; 1873 struct sctp_inpcb *tinp; 1874 1875 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1876 /* only works with port reuse on */ 1877 return (-1); 1878 } 1879 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1880 return (0); 1881 } 1882 SCTP_INP_RUNLOCK(inp); 1883 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1884 SCTP_BASE_INFO(hashmark))]; 1885 /* Kick out all non-listeners to the TCP hash */ 1886 LIST_FOREACH(tinp, head, sctp_hash) { 1887 if (tinp->sctp_lport != inp->sctp_lport) { 1888 continue; 1889 } 1890 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1891 continue; 1892 } 1893 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1894 continue; 1895 } 1896 if (tinp->sctp_socket->so_qlimit) { 1897 continue; 1898 } 1899 SCTP_INP_WLOCK(tinp); 1900 LIST_REMOVE(tinp, sctp_hash); 1901 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1902 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1903 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1904 SCTP_INP_WUNLOCK(tinp); 1905 } 1906 SCTP_INP_WLOCK(inp); 1907 /* Pull from where he was */ 1908 LIST_REMOVE(inp, sctp_hash); 1909 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1910 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1911 LIST_INSERT_HEAD(head, inp, sctp_hash); 1912 SCTP_INP_WUNLOCK(inp); 1913 SCTP_INP_RLOCK(inp); 1914 return (0); 1915} 1916 1917 1918struct sctp_inpcb * 1919sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1920 uint32_t vrf_id) 1921{ 1922 /* 1923 * First we check the hash table to see if someone has this port 1924 * bound with just the port. 1925 */ 1926 struct sctp_inpcb *inp; 1927 struct sctppcbhead *head; 1928 int lport; 1929 unsigned int i; 1930 1931#ifdef INET 1932 struct sockaddr_in *sin; 1933 1934#endif 1935#ifdef INET6 1936 struct sockaddr_in6 *sin6; 1937 1938#endif 1939 1940 switch (nam->sa_family) { 1941#ifdef INET 1942 case AF_INET: 1943 sin = (struct sockaddr_in *)nam; 1944 lport = sin->sin_port; 1945 break; 1946#endif 1947#ifdef INET6 1948 case AF_INET6: 1949 sin6 = (struct sockaddr_in6 *)nam; 1950 lport = sin6->sin6_port; 1951 break; 1952#endif 1953 default: 1954 return (NULL); 1955 } 1956 /* 1957 * I could cheat here and just cast to one of the types but we will 1958 * do it right. It also provides the check against an Unsupported 1959 * type too. 1960 */ 1961 /* Find the head of the ALLADDR chain */ 1962 if (have_lock == 0) { 1963 SCTP_INP_INFO_RLOCK(); 1964 } 1965 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1966 SCTP_BASE_INFO(hashmark))]; 1967 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1968 1969 /* 1970 * If the TCP model exists it could be that the main listening 1971 * endpoint is gone but there still exists a connected socket for 1972 * this guy. If so we can return the first one that we find. This 1973 * may NOT be the correct one so the caller should be wary on the 1974 * returned INP. Currently the only caller that sets find_tcp_pool 1975 * is in bindx where we are verifying that a user CAN bind the 1976 * address. He either has bound it already, or someone else has, or 1977 * its open to bind, so this is good enough. 1978 */ 1979 if (inp == NULL && find_tcp_pool) { 1980 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1981 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1982 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1983 if (inp) { 1984 break; 1985 } 1986 } 1987 } 1988 if (inp) { 1989 SCTP_INP_INCR_REF(inp); 1990 } 1991 if (have_lock == 0) { 1992 SCTP_INP_INFO_RUNLOCK(); 1993 } 1994 return (inp); 1995} 1996 1997 1998/* 1999 * Find an association for an endpoint with the pointer to whom you want to 2000 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2001 * need to change the *to to some other struct like a mbuf... 2002 */ 2003struct sctp_tcb * 2004sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2005 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2006 uint32_t vrf_id) 2007{ 2008 struct sctp_inpcb *inp = NULL; 2009 struct sctp_tcb *stcb; 2010 2011 SCTP_INP_INFO_RLOCK(); 2012 if (find_tcp_pool) { 2013 if (inp_p != NULL) { 2014 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2015 vrf_id); 2016 } else { 2017 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2018 vrf_id); 2019 } 2020 if (stcb != NULL) { 2021 SCTP_INP_INFO_RUNLOCK(); 2022 return (stcb); 2023 } 2024 } 2025 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2026 if (inp_p != NULL) { 2027 *inp_p = inp; 2028 } 2029 SCTP_INP_INFO_RUNLOCK(); 2030 if (inp == NULL) { 2031 return (NULL); 2032 } 2033 /* 2034 * ok, we have an endpoint, now lets find the assoc for it (if any) 2035 * we now place the source address or from in the to of the find 2036 * endpoint call. Since in reality this chain is used from the 2037 * inbound packet side. 2038 */ 2039 if (inp_p != NULL) { 2040 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2041 NULL); 2042 } else { 2043 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2044 NULL); 2045 } 2046 return (stcb); 2047} 2048 2049 2050/* 2051 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2052 * find all addresses that the sender has specified in any address list. Each 2053 * address will be used to lookup the TCB and see if one exits. 2054 */ 2055static struct sctp_tcb * 2056sctp_findassociation_special_addr(struct mbuf *m, int offset, 2057 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2058 struct sockaddr *dst) 2059{ 2060 struct sctp_paramhdr *phdr, parm_buf; 2061 2062#if defined(INET) || defined(INET6) 2063 struct sctp_tcb *stcb; 2064 uint16_t ptype; 2065 2066#endif 2067 uint16_t plen; 2068 2069#ifdef INET 2070 struct sockaddr_in sin4; 2071 2072#endif 2073#ifdef INET6 2074 struct sockaddr_in6 sin6; 2075 2076#endif 2077 2078#ifdef INET 2079 memset(&sin4, 0, sizeof(sin4)); 2080 sin4.sin_len = sizeof(sin4); 2081 sin4.sin_family = AF_INET; 2082 sin4.sin_port = sh->src_port; 2083#endif 2084#ifdef INET6 2085 memset(&sin6, 0, sizeof(sin6)); 2086 sin6.sin6_len = sizeof(sin6); 2087 sin6.sin6_family = AF_INET6; 2088 sin6.sin6_port = sh->src_port; 2089#endif 2090 2091 offset += sizeof(struct sctp_init_chunk); 2092 2093 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2094 while (phdr != NULL) { 2095 /* now we must see if we want the parameter */ 2096#if defined(INET) || defined(INET6) 2097 ptype = ntohs(phdr->param_type); 2098#endif 2099 plen = ntohs(phdr->param_length); 2100 if (plen == 0) { 2101 break; 2102 } 2103#ifdef INET 2104 if (ptype == SCTP_IPV4_ADDRESS && 2105 plen == sizeof(struct sctp_ipv4addr_param)) { 2106 /* Get the rest of the address */ 2107 struct sctp_ipv4addr_param ip4_parm, *p4; 2108 2109 phdr = sctp_get_next_param(m, offset, 2110 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2111 if (phdr == NULL) { 2112 return (NULL); 2113 } 2114 p4 = (struct sctp_ipv4addr_param *)phdr; 2115 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2116 /* look it up */ 2117 stcb = sctp_findassociation_ep_addr(inp_p, 2118 (struct sockaddr *)&sin4, netp, dst, NULL); 2119 if (stcb != NULL) { 2120 return (stcb); 2121 } 2122 } 2123#endif 2124#ifdef INET6 2125 if (ptype == SCTP_IPV6_ADDRESS && 2126 plen == sizeof(struct sctp_ipv6addr_param)) { 2127 /* Get the rest of the address */ 2128 struct sctp_ipv6addr_param ip6_parm, *p6; 2129 2130 phdr = sctp_get_next_param(m, offset, 2131 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2132 if (phdr == NULL) { 2133 return (NULL); 2134 } 2135 p6 = (struct sctp_ipv6addr_param *)phdr; 2136 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2137 /* look it up */ 2138 stcb = sctp_findassociation_ep_addr(inp_p, 2139 (struct sockaddr *)&sin6, netp, dst, NULL); 2140 if (stcb != NULL) { 2141 return (stcb); 2142 } 2143 } 2144#endif 2145 offset += SCTP_SIZE32(plen); 2146 phdr = sctp_get_next_param(m, offset, &parm_buf, 2147 sizeof(parm_buf)); 2148 } 2149 return (NULL); 2150} 2151 2152static struct sctp_tcb * 2153sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2154 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2155 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2156{ 2157 /* 2158 * Use my vtag to hash. If we find it we then verify the source addr 2159 * is in the assoc. If all goes well we save a bit on rec of a 2160 * packet. 2161 */ 2162 struct sctpasochead *head; 2163 struct sctp_nets *net; 2164 struct sctp_tcb *stcb; 2165 2166 SCTP_INP_INFO_RLOCK(); 2167 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2168 SCTP_BASE_INFO(hashasocmark))]; 2169 if (head == NULL) { 2170 /* invalid vtag */ 2171 SCTP_INP_INFO_RUNLOCK(); 2172 return (NULL); 2173 } 2174 LIST_FOREACH(stcb, head, sctp_asocs) { 2175 SCTP_INP_RLOCK(stcb->sctp_ep); 2176 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2177 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2178 continue; 2179 } 2180 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2181 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2182 continue; 2183 } 2184 SCTP_TCB_LOCK(stcb); 2185 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2186 if (stcb->asoc.my_vtag == vtag) { 2187 /* candidate */ 2188 if (stcb->rport != rport) { 2189 SCTP_TCB_UNLOCK(stcb); 2190 continue; 2191 } 2192 if (stcb->sctp_ep->sctp_lport != lport) { 2193 SCTP_TCB_UNLOCK(stcb); 2194 continue; 2195 } 2196 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 /* RRS:Need toaddr check here */ 2201 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2202 /* Endpoint does not own this address */ 2203 SCTP_TCB_UNLOCK(stcb); 2204 continue; 2205 } 2206 if (remote_tag) { 2207 /* 2208 * If we have both vtags that's all we match 2209 * on 2210 */ 2211 if (stcb->asoc.peer_vtag == remote_tag) { 2212 /* 2213 * If both tags match we consider it 2214 * conclusive and check NO 2215 * source/destination addresses 2216 */ 2217 goto conclusive; 2218 } 2219 } 2220 if (skip_src_check) { 2221 conclusive: 2222 if (from) { 2223 *netp = sctp_findnet(stcb, from); 2224 } else { 2225 *netp = NULL; /* unknown */ 2226 } 2227 if (inp_p) 2228 *inp_p = stcb->sctp_ep; 2229 SCTP_INP_INFO_RUNLOCK(); 2230 return (stcb); 2231 } 2232 net = sctp_findnet(stcb, from); 2233 if (net) { 2234 /* yep its him. */ 2235 *netp = net; 2236 SCTP_STAT_INCR(sctps_vtagexpress); 2237 *inp_p = stcb->sctp_ep; 2238 SCTP_INP_INFO_RUNLOCK(); 2239 return (stcb); 2240 } else { 2241 /* 2242 * not him, this should only happen in rare 2243 * cases so I peg it. 2244 */ 2245 SCTP_STAT_INCR(sctps_vtagbogus); 2246 } 2247 } 2248 SCTP_TCB_UNLOCK(stcb); 2249 } 2250 SCTP_INP_INFO_RUNLOCK(); 2251 return (NULL); 2252} 2253 2254 2255/* 2256 * Find an association with the pointer to the inbound IP packet. This can be 2257 * a IPv4 or IPv6 packet. 2258 */ 2259struct sctp_tcb * 2260sctp_findassociation_addr(struct mbuf *m, int offset, 2261 struct sockaddr *src, struct sockaddr *dst, 2262 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2263 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2264{ 2265 int find_tcp_pool; 2266 struct sctp_tcb *stcb; 2267 struct sctp_inpcb *inp; 2268 2269 if (sh->v_tag) { 2270 /* we only go down this path if vtag is non-zero */ 2271 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2272 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2273 if (stcb) { 2274 return (stcb); 2275 } 2276 } 2277 find_tcp_pool = 0; 2278 if ((ch->chunk_type != SCTP_INITIATION) && 2279 (ch->chunk_type != SCTP_INITIATION_ACK) && 2280 (ch->chunk_type != SCTP_COOKIE_ACK) && 2281 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2282 /* Other chunk types go to the tcp pool. */ 2283 find_tcp_pool = 1; 2284 } 2285 if (inp_p) { 2286 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2287 find_tcp_pool, vrf_id); 2288 inp = *inp_p; 2289 } else { 2290 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2291 find_tcp_pool, vrf_id); 2292 } 2293 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2294 if (stcb == NULL && inp) { 2295 /* Found a EP but not this address */ 2296 if ((ch->chunk_type == SCTP_INITIATION) || 2297 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2298 /*- 2299 * special hook, we do NOT return linp or an 2300 * association that is linked to an existing 2301 * association that is under the TCP pool (i.e. no 2302 * listener exists). The endpoint finding routine 2303 * will always find a listener before examining the 2304 * TCP pool. 2305 */ 2306 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2307 if (inp_p) { 2308 *inp_p = NULL; 2309 } 2310 return (NULL); 2311 } 2312 stcb = sctp_findassociation_special_addr(m, 2313 offset, sh, &inp, netp, dst); 2314 if (inp_p != NULL) { 2315 *inp_p = inp; 2316 } 2317 } 2318 } 2319 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2320 return (stcb); 2321} 2322 2323/* 2324 * lookup an association by an ASCONF lookup address. 2325 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2326 */ 2327struct sctp_tcb * 2328sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2329 struct sockaddr *dst, struct sctphdr *sh, 2330 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2331{ 2332 struct sctp_tcb *stcb; 2333 struct sockaddr_storage remote_store; 2334 struct sctp_paramhdr parm_buf, *phdr; 2335 int ptype; 2336 int zero_address = 0; 2337 2338#ifdef INET 2339 struct sockaddr_in *sin; 2340 2341#endif 2342#ifdef INET6 2343 struct sockaddr_in6 *sin6; 2344 2345#endif 2346 2347 memset(&remote_store, 0, sizeof(remote_store)); 2348 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2349 &parm_buf, sizeof(struct sctp_paramhdr)); 2350 if (phdr == NULL) { 2351 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2352 __FUNCTION__); 2353 return NULL; 2354 } 2355 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2356 /* get the correlation address */ 2357 switch (ptype) { 2358#ifdef INET6 2359 case SCTP_IPV6_ADDRESS: 2360 { 2361 /* ipv6 address param */ 2362 struct sctp_ipv6addr_param *p6, p6_buf; 2363 2364 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2365 return NULL; 2366 } 2367 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2368 offset + sizeof(struct sctp_asconf_chunk), 2369 &p6_buf.ph, sizeof(*p6)); 2370 if (p6 == NULL) { 2371 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2372 __FUNCTION__); 2373 return (NULL); 2374 } 2375 sin6 = (struct sockaddr_in6 *)&remote_store; 2376 sin6->sin6_family = AF_INET6; 2377 sin6->sin6_len = sizeof(*sin6); 2378 sin6->sin6_port = sh->src_port; 2379 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2380 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2381 zero_address = 1; 2382 break; 2383 } 2384#endif 2385#ifdef INET 2386 case SCTP_IPV4_ADDRESS: 2387 { 2388 /* ipv4 address param */ 2389 struct sctp_ipv4addr_param *p4, p4_buf; 2390 2391 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2392 return NULL; 2393 } 2394 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2395 offset + sizeof(struct sctp_asconf_chunk), 2396 &p4_buf.ph, sizeof(*p4)); 2397 if (p4 == NULL) { 2398 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2399 __FUNCTION__); 2400 return (NULL); 2401 } 2402 sin = (struct sockaddr_in *)&remote_store; 2403 sin->sin_family = AF_INET; 2404 sin->sin_len = sizeof(*sin); 2405 sin->sin_port = sh->src_port; 2406 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2407 if (sin->sin_addr.s_addr == INADDR_ANY) 2408 zero_address = 1; 2409 break; 2410 } 2411#endif 2412 default: 2413 /* invalid address param type */ 2414 return NULL; 2415 } 2416 2417 if (zero_address) { 2418 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2419 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2420 if (stcb != NULL) { 2421 SCTP_INP_DECR_REF(*inp_p); 2422 } 2423 } else { 2424 stcb = sctp_findassociation_ep_addr(inp_p, 2425 (struct sockaddr *)&remote_store, netp, 2426 dst, NULL); 2427 } 2428 return (stcb); 2429} 2430 2431 2432/* 2433 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2434 * addresses. This way if we don't get a bind we by default pick a ephemeral 2435 * port with all addresses bound. 2436 */ 2437int 2438sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2439{ 2440 /* 2441 * we get called when a new endpoint starts up. We need to allocate 2442 * the sctp_inpcb structure from the zone and init it. Mark it as 2443 * unbound and find a port that we can use as an ephemeral with 2444 * INADDR_ANY. If the user binds later no problem we can then add in 2445 * the specific addresses. And setup the default parameters for the 2446 * EP. 2447 */ 2448 int i, error; 2449 struct sctp_inpcb *inp; 2450 struct sctp_pcb *m; 2451 struct timeval time; 2452 sctp_sharedkey_t *null_key; 2453 2454 error = 0; 2455 2456 SCTP_INP_INFO_WLOCK(); 2457 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2458 if (inp == NULL) { 2459 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2460 SCTP_INP_INFO_WUNLOCK(); 2461 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2462 return (ENOBUFS); 2463 } 2464 /* zap it */ 2465 bzero(inp, sizeof(*inp)); 2466 2467 /* bump generations */ 2468 /* setup socket pointers */ 2469 inp->sctp_socket = so; 2470 inp->ip_inp.inp.inp_socket = so; 2471 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2472#ifdef INET6 2473 if (INP_SOCKAF(so) == AF_INET6) { 2474 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2475 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2476 } 2477 if (MODULE_GLOBAL(ip6_v6only)) { 2478 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2479 } 2480 } 2481#endif 2482 inp->sctp_associd_counter = 1; 2483 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2484 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2485 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2486 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2487 /* init the small hash table we use to track asocid <-> tcb */ 2488 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2489 if (inp->sctp_asocidhash == NULL) { 2490 crfree(inp->ip_inp.inp.inp_cred); 2491 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2492 SCTP_INP_INFO_WUNLOCK(); 2493 return (ENOBUFS); 2494 } 2495#ifdef IPSEC 2496 { 2497 struct inpcbpolicy *pcb_sp = NULL; 2498 2499 error = ipsec_init_policy(so, &pcb_sp); 2500 /* Arrange to share the policy */ 2501 inp->ip_inp.inp.inp_sp = pcb_sp; 2502 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2503 } 2504 if (error != 0) { 2505 crfree(inp->ip_inp.inp.inp_cred); 2506 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2507 SCTP_INP_INFO_WUNLOCK(); 2508 return error; 2509 } 2510#endif /* IPSEC */ 2511 SCTP_INCR_EP_COUNT(); 2512 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2513 SCTP_INP_INFO_WUNLOCK(); 2514 2515 so->so_pcb = (caddr_t)inp; 2516 2517 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2518 /* UDP style socket */ 2519 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2520 SCTP_PCB_FLAGS_UNBOUND); 2521 /* Be sure it is NON-BLOCKING IO for UDP */ 2522 /* SCTP_SET_SO_NBIO(so); */ 2523 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2524 /* TCP style socket */ 2525 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2526 SCTP_PCB_FLAGS_UNBOUND); 2527 /* Be sure we have blocking IO by default */ 2528 SCTP_CLEAR_SO_NBIO(so); 2529 } else { 2530 /* 2531 * unsupported socket type (RAW, etc)- in case we missed it 2532 * in protosw 2533 */ 2534 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2535 so->so_pcb = NULL; 2536 crfree(inp->ip_inp.inp.inp_cred); 2537 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2538 return (EOPNOTSUPP); 2539 } 2540 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2541 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2542 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2543 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2544 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2545 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2546 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2547 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2548 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2549 } 2550 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2551 &inp->sctp_hashmark); 2552 if (inp->sctp_tcbhash == NULL) { 2553 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2554 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2555 so->so_pcb = NULL; 2556 crfree(inp->ip_inp.inp.inp_cred); 2557 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2558 return (ENOBUFS); 2559 } 2560 inp->def_vrf_id = vrf_id; 2561 2562 SCTP_INP_INFO_WLOCK(); 2563 SCTP_INP_LOCK_INIT(inp); 2564 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2565 SCTP_INP_READ_INIT(inp); 2566 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2567 /* lock the new ep */ 2568 SCTP_INP_WLOCK(inp); 2569 2570 /* add it to the info area */ 2571 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2572 SCTP_INP_INFO_WUNLOCK(); 2573 2574 TAILQ_INIT(&inp->read_queue); 2575 LIST_INIT(&inp->sctp_addr_list); 2576 2577 LIST_INIT(&inp->sctp_asoc_list); 2578 2579#ifdef SCTP_TRACK_FREED_ASOCS 2580 /* TEMP CODE */ 2581 LIST_INIT(&inp->sctp_asoc_free_list); 2582#endif 2583 /* Init the timer structure for signature change */ 2584 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2585 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2586 2587 /* now init the actual endpoint default data */ 2588 m = &inp->sctp_ep; 2589 2590 /* setup the base timeout information */ 2591 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2592 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2593 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2594 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2595 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2596 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2597 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2598 /* all max/min max are in ms */ 2599 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2600 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2601 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2602 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2603 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2604 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2605 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2606 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2607 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2608 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2609 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2610 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2611 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2612 2613 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2614 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2615 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2616 /* number of streams to pre-open on a association */ 2617 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2618 2619 /* Add adaptation cookie */ 2620 m->adaptation_layer_indicator = 0; 2621 m->adaptation_layer_indicator_provided = 0; 2622 2623 /* seed random number generator */ 2624 m->random_counter = 1; 2625 m->store_at = SCTP_SIGNATURE_SIZE; 2626 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2627 sctp_fill_random_store(m); 2628 2629 /* Minimum cookie size */ 2630 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2631 sizeof(struct sctp_state_cookie); 2632 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2633 2634 /* Setup the initial secret */ 2635 (void)SCTP_GETTIME_TIMEVAL(&time); 2636 m->time_of_secret_change = time.tv_sec; 2637 2638 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2639 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2640 } 2641 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2642 2643 /* How long is a cookie good for ? */ 2644 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2645 /* 2646 * Initialize authentication parameters 2647 */ 2648 m->local_hmacs = sctp_default_supported_hmaclist(); 2649 m->local_auth_chunks = sctp_alloc_chunklist(); 2650 m->default_dscp = 0; 2651#ifdef INET6 2652 m->default_flowlabel = 0; 2653#endif 2654 m->port = 0; /* encapsulation disabled by default */ 2655 sctp_auth_set_default_chunks(m->local_auth_chunks); 2656 LIST_INIT(&m->shared_keys); 2657 /* add default NULL key as key id 0 */ 2658 null_key = sctp_alloc_sharedkey(); 2659 sctp_insert_sharedkey(&m->shared_keys, null_key); 2660 SCTP_INP_WUNLOCK(inp); 2661#ifdef SCTP_LOG_CLOSING 2662 sctp_log_closing(inp, NULL, 12); 2663#endif 2664 return (error); 2665} 2666 2667 2668void 2669sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2670 struct sctp_tcb *stcb) 2671{ 2672 struct sctp_nets *net; 2673 uint16_t lport, rport; 2674 struct sctppcbhead *head; 2675 struct sctp_laddr *laddr, *oladdr; 2676 2677 atomic_add_int(&stcb->asoc.refcnt, 1); 2678 SCTP_TCB_UNLOCK(stcb); 2679 SCTP_INP_INFO_WLOCK(); 2680 SCTP_INP_WLOCK(old_inp); 2681 SCTP_INP_WLOCK(new_inp); 2682 SCTP_TCB_LOCK(stcb); 2683 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2684 2685 new_inp->sctp_ep.time_of_secret_change = 2686 old_inp->sctp_ep.time_of_secret_change; 2687 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2688 sizeof(old_inp->sctp_ep.secret_key)); 2689 new_inp->sctp_ep.current_secret_number = 2690 old_inp->sctp_ep.current_secret_number; 2691 new_inp->sctp_ep.last_secret_number = 2692 old_inp->sctp_ep.last_secret_number; 2693 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2694 2695 /* make it so new data pours into the new socket */ 2696 stcb->sctp_socket = new_inp->sctp_socket; 2697 stcb->sctp_ep = new_inp; 2698 2699 /* Copy the port across */ 2700 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2701 rport = stcb->rport; 2702 /* Pull the tcb from the old association */ 2703 LIST_REMOVE(stcb, sctp_tcbhash); 2704 LIST_REMOVE(stcb, sctp_tcblist); 2705 if (stcb->asoc.in_asocid_hash) { 2706 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2707 } 2708 /* Now insert the new_inp into the TCP connected hash */ 2709 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2710 2711 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2712 /* Its safe to access */ 2713 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2714 2715 /* Now move the tcb into the endpoint list */ 2716 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2717 /* 2718 * Question, do we even need to worry about the ep-hash since we 2719 * only have one connection? Probably not :> so lets get rid of it 2720 * and not suck up any kernel memory in that. 2721 */ 2722 if (stcb->asoc.in_asocid_hash) { 2723 struct sctpasochead *lhd; 2724 2725 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2726 new_inp->hashasocidmark)]; 2727 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2728 } 2729 /* Ok. Let's restart timer. */ 2730 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2731 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2732 stcb, net); 2733 } 2734 2735 SCTP_INP_INFO_WUNLOCK(); 2736 if (new_inp->sctp_tcbhash != NULL) { 2737 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2738 new_inp->sctp_tcbhash = NULL; 2739 } 2740 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2741 /* Subset bound, so copy in the laddr list from the old_inp */ 2742 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2743 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2744 if (laddr == NULL) { 2745 /* 2746 * Gak, what can we do? This assoc is really 2747 * HOSED. We probably should send an abort 2748 * here. 2749 */ 2750 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2751 continue; 2752 } 2753 SCTP_INCR_LADDR_COUNT(); 2754 bzero(laddr, sizeof(*laddr)); 2755 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2756 laddr->ifa = oladdr->ifa; 2757 atomic_add_int(&laddr->ifa->refcount, 1); 2758 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2759 sctp_nxt_addr); 2760 new_inp->laddr_count++; 2761 if (oladdr == stcb->asoc.last_used_address) { 2762 stcb->asoc.last_used_address = laddr; 2763 } 2764 } 2765 } 2766 /* 2767 * Now any running timers need to be adjusted since we really don't 2768 * care if they are running or not just blast in the new_inp into 2769 * all of them. 2770 */ 2771 2772 stcb->asoc.dack_timer.ep = (void *)new_inp; 2773 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2774 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2775 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2776 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2777 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2778 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2779 /* now what about the nets? */ 2780 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2781 net->pmtu_timer.ep = (void *)new_inp; 2782 net->hb_timer.ep = (void *)new_inp; 2783 net->rxt_timer.ep = (void *)new_inp; 2784 } 2785 SCTP_INP_WUNLOCK(new_inp); 2786 SCTP_INP_WUNLOCK(old_inp); 2787} 2788 2789 2790 2791 2792/* sctp_ifap is used to bypass normal local address validation checks */ 2793int 2794sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2795 struct sctp_ifa *sctp_ifap, struct thread *p) 2796{ 2797 /* bind a ep to a socket address */ 2798 struct sctppcbhead *head; 2799 struct sctp_inpcb *inp, *inp_tmp; 2800 struct inpcb *ip_inp; 2801 int port_reuse_active = 0; 2802 int bindall; 2803 uint16_t lport; 2804 int error; 2805 uint32_t vrf_id; 2806 2807 lport = 0; 2808 bindall = 1; 2809 inp = (struct sctp_inpcb *)so->so_pcb; 2810 ip_inp = (struct inpcb *)so->so_pcb; 2811#ifdef SCTP_DEBUG 2812 if (addr) { 2813 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2814 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2815 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2816 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2817 } 2818#endif 2819 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2820 /* already did a bind, subsequent binds NOT allowed ! */ 2821 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2822 return (EINVAL); 2823 } 2824#ifdef INVARIANTS 2825 if (p == NULL) 2826 panic("null proc/thread"); 2827#endif 2828 if (addr != NULL) { 2829 switch (addr->sa_family) { 2830#ifdef INET 2831 case AF_INET: 2832 { 2833 struct sockaddr_in *sin; 2834 2835 /* IPV6_V6ONLY socket? */ 2836 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2837 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2838 return (EINVAL); 2839 } 2840 if (addr->sa_len != sizeof(*sin)) { 2841 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2842 return (EINVAL); 2843 } 2844 sin = (struct sockaddr_in *)addr; 2845 lport = sin->sin_port; 2846 /* 2847 * For LOOPBACK the prison_local_ip4() call 2848 * will transmute the ip address to the 2849 * proper value. 2850 */ 2851 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2852 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2853 return (error); 2854 } 2855 if (sin->sin_addr.s_addr != INADDR_ANY) { 2856 bindall = 0; 2857 } 2858 break; 2859 } 2860#endif 2861#ifdef INET6 2862 case AF_INET6: 2863 { 2864 /* 2865 * Only for pure IPv6 Address. (No IPv4 2866 * Mapped!) 2867 */ 2868 struct sockaddr_in6 *sin6; 2869 2870 sin6 = (struct sockaddr_in6 *)addr; 2871 2872 if (addr->sa_len != sizeof(*sin6)) { 2873 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2874 return (EINVAL); 2875 } 2876 lport = sin6->sin6_port; 2877 /* 2878 * For LOOPBACK the prison_local_ip6() call 2879 * will transmute the ipv6 address to the 2880 * proper value. 2881 */ 2882 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2883 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2884 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2885 return (error); 2886 } 2887 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2888 bindall = 0; 2889 /* KAME hack: embed scopeid */ 2890 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2891 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2892 return (EINVAL); 2893 } 2894 } 2895 /* this must be cleared for ifa_ifwithaddr() */ 2896 sin6->sin6_scope_id = 0; 2897 break; 2898 } 2899#endif 2900 default: 2901 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2902 return (EAFNOSUPPORT); 2903 } 2904 } 2905 SCTP_INP_INFO_WLOCK(); 2906 SCTP_INP_WLOCK(inp); 2907 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2908 vrf_id = inp->def_vrf_id; 2909 2910 /* increase our count due to the unlock we do */ 2911 SCTP_INP_INCR_REF(inp); 2912 if (lport) { 2913 /* 2914 * Did the caller specify a port? if so we must see if an ep 2915 * already has this one bound. 2916 */ 2917 /* got to be root to get at low ports */ 2918 if (ntohs(lport) < IPPORT_RESERVED) { 2919 if (p && (error = 2920 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2921 )) { 2922 SCTP_INP_DECR_REF(inp); 2923 SCTP_INP_WUNLOCK(inp); 2924 SCTP_INP_INFO_WUNLOCK(); 2925 return (error); 2926 } 2927 } 2928 SCTP_INP_WUNLOCK(inp); 2929 if (bindall) { 2930 vrf_id = inp->def_vrf_id; 2931 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2932 if (inp_tmp != NULL) { 2933 /* 2934 * lock guy returned and lower count note 2935 * that we are not bound so inp_tmp should 2936 * NEVER be inp. And it is this inp 2937 * (inp_tmp) that gets the reference bump, 2938 * so we must lower it. 2939 */ 2940 SCTP_INP_DECR_REF(inp_tmp); 2941 /* unlock info */ 2942 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2943 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2944 /* 2945 * Ok, must be one-2-one and 2946 * allowing port re-use 2947 */ 2948 port_reuse_active = 1; 2949 goto continue_anyway; 2950 } 2951 SCTP_INP_DECR_REF(inp); 2952 SCTP_INP_INFO_WUNLOCK(); 2953 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2954 return (EADDRINUSE); 2955 } 2956 } else { 2957 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2958 if (inp_tmp != NULL) { 2959 /* 2960 * lock guy returned and lower count note 2961 * that we are not bound so inp_tmp should 2962 * NEVER be inp. And it is this inp 2963 * (inp_tmp) that gets the reference bump, 2964 * so we must lower it. 2965 */ 2966 SCTP_INP_DECR_REF(inp_tmp); 2967 /* unlock info */ 2968 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2969 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2970 /* 2971 * Ok, must be one-2-one and 2972 * allowing port re-use 2973 */ 2974 port_reuse_active = 1; 2975 goto continue_anyway; 2976 } 2977 SCTP_INP_DECR_REF(inp); 2978 SCTP_INP_INFO_WUNLOCK(); 2979 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2980 return (EADDRINUSE); 2981 } 2982 } 2983continue_anyway: 2984 SCTP_INP_WLOCK(inp); 2985 if (bindall) { 2986 /* verify that no lport is not used by a singleton */ 2987 if ((port_reuse_active == 0) && 2988 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2989 /* Sorry someone already has this one bound */ 2990 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2991 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2992 port_reuse_active = 1; 2993 } else { 2994 SCTP_INP_DECR_REF(inp); 2995 SCTP_INP_WUNLOCK(inp); 2996 SCTP_INP_INFO_WUNLOCK(); 2997 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2998 return (EADDRINUSE); 2999 } 3000 } 3001 } 3002 } else { 3003 uint16_t first, last, candidate; 3004 uint16_t count; 3005 int done; 3006 3007 if (ip_inp->inp_flags & INP_HIGHPORT) { 3008 first = MODULE_GLOBAL(ipport_hifirstauto); 3009 last = MODULE_GLOBAL(ipport_hilastauto); 3010 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3011 if (p && (error = 3012 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3013 )) { 3014 SCTP_INP_DECR_REF(inp); 3015 SCTP_INP_WUNLOCK(inp); 3016 SCTP_INP_INFO_WUNLOCK(); 3017 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3018 return (error); 3019 } 3020 first = MODULE_GLOBAL(ipport_lowfirstauto); 3021 last = MODULE_GLOBAL(ipport_lowlastauto); 3022 } else { 3023 first = MODULE_GLOBAL(ipport_firstauto); 3024 last = MODULE_GLOBAL(ipport_lastauto); 3025 } 3026 if (first > last) { 3027 uint16_t temp; 3028 3029 temp = first; 3030 first = last; 3031 last = temp; 3032 } 3033 count = last - first + 1; /* number of candidates */ 3034 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3035 3036 done = 0; 3037 while (!done) { 3038 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3039 done = 1; 3040 } 3041 if (!done) { 3042 if (--count == 0) { 3043 SCTP_INP_DECR_REF(inp); 3044 SCTP_INP_WUNLOCK(inp); 3045 SCTP_INP_INFO_WUNLOCK(); 3046 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3047 return (EADDRINUSE); 3048 } 3049 if (candidate == last) 3050 candidate = first; 3051 else 3052 candidate = candidate + 1; 3053 } 3054 } 3055 lport = htons(candidate); 3056 } 3057 SCTP_INP_DECR_REF(inp); 3058 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3059 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3060 /* 3061 * this really should not happen. The guy did a non-blocking 3062 * bind and then did a close at the same time. 3063 */ 3064 SCTP_INP_WUNLOCK(inp); 3065 SCTP_INP_INFO_WUNLOCK(); 3066 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3067 return (EINVAL); 3068 } 3069 /* ok we look clear to give out this port, so lets setup the binding */ 3070 if (bindall) { 3071 /* binding to all addresses, so just set in the proper flags */ 3072 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3073 /* set the automatic addr changes from kernel flag */ 3074 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3075 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3076 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3077 } else { 3078 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3079 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3080 } 3081 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3082 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3083 } else { 3084 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3085 } 3086 /* 3087 * set the automatic mobility_base from kernel flag (by 3088 * micchie) 3089 */ 3090 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3091 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3092 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3093 } else { 3094 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3095 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3096 } 3097 /* 3098 * set the automatic mobility_fasthandoff from kernel flag 3099 * (by micchie) 3100 */ 3101 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3102 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3103 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3104 } else { 3105 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3106 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3107 } 3108 } else { 3109 /* 3110 * bind specific, make sure flags is off and add a new 3111 * address structure to the sctp_addr_list inside the ep 3112 * structure. 3113 * 3114 * We will need to allocate one and insert it at the head. The 3115 * socketopt call can just insert new addresses in there as 3116 * well. It will also have to do the embed scope kame hack 3117 * too (before adding). 3118 */ 3119 struct sctp_ifa *ifa; 3120 struct sockaddr_storage store_sa; 3121 3122 memset(&store_sa, 0, sizeof(store_sa)); 3123 switch (addr->sa_family) { 3124#ifdef INET 3125 case AF_INET: 3126 { 3127 struct sockaddr_in *sin; 3128 3129 sin = (struct sockaddr_in *)&store_sa; 3130 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3131 sin->sin_port = 0; 3132 break; 3133 } 3134#endif 3135#ifdef INET6 3136 case AF_INET6: 3137 { 3138 struct sockaddr_in6 *sin6; 3139 3140 sin6 = (struct sockaddr_in6 *)&store_sa; 3141 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3142 sin6->sin6_port = 0; 3143 break; 3144 } 3145#endif 3146 default: 3147 break; 3148 } 3149 /* 3150 * first find the interface with the bound address need to 3151 * zero out the port to find the address! yuck! can't do 3152 * this earlier since need port for sctp_pcb_findep() 3153 */ 3154 if (sctp_ifap != NULL) { 3155 ifa = sctp_ifap; 3156 } else { 3157 /* 3158 * Note for BSD we hit here always other O/S's will 3159 * pass things in via the sctp_ifap argument 3160 * (Panda). 3161 */ 3162 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3163 vrf_id, SCTP_ADDR_NOT_LOCKED); 3164 } 3165 if (ifa == NULL) { 3166 /* Can't find an interface with that address */ 3167 SCTP_INP_WUNLOCK(inp); 3168 SCTP_INP_INFO_WUNLOCK(); 3169 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3170 return (EADDRNOTAVAIL); 3171 } 3172#ifdef INET6 3173 if (addr->sa_family == AF_INET6) { 3174 /* GAK, more FIXME IFA lock? */ 3175 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3176 /* Can't bind a non-existent addr. */ 3177 SCTP_INP_WUNLOCK(inp); 3178 SCTP_INP_INFO_WUNLOCK(); 3179 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3180 return (EINVAL); 3181 } 3182 } 3183#endif 3184 /* we're not bound all */ 3185 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3186 /* allow bindx() to send ASCONF's for binding changes */ 3187 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3188 /* clear automatic addr changes from kernel flag */ 3189 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3190 3191 /* add this address to the endpoint list */ 3192 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3193 if (error != 0) { 3194 SCTP_INP_WUNLOCK(inp); 3195 SCTP_INP_INFO_WUNLOCK(); 3196 return (error); 3197 } 3198 inp->laddr_count++; 3199 } 3200 /* find the bucket */ 3201 if (port_reuse_active) { 3202 /* Put it into tcp 1-2-1 hash */ 3203 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3204 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3205 } else { 3206 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3207 } 3208 /* put it in the bucket */ 3209 LIST_INSERT_HEAD(head, inp, sctp_hash); 3210 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3211 (void *)head, ntohs(lport), port_reuse_active); 3212 /* set in the port */ 3213 inp->sctp_lport = lport; 3214 3215 /* turn off just the unbound flag */ 3216 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3217 SCTP_INP_WUNLOCK(inp); 3218 SCTP_INP_INFO_WUNLOCK(); 3219 return (0); 3220} 3221 3222 3223static void 3224sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3225{ 3226 struct sctp_iterator *it, *nit; 3227 3228 /* 3229 * We enter with the only the ITERATOR_LOCK in place and a write 3230 * lock on the inp_info stuff. 3231 */ 3232 it = sctp_it_ctl.cur_it; 3233 if (it && (it->vn != curvnet)) { 3234 /* Its not looking at our VNET */ 3235 return; 3236 } 3237 if (it && (it->inp == inp)) { 3238 /* 3239 * This is tricky and we hold the iterator lock, but when it 3240 * returns and gets the lock (when we release it) the 3241 * iterator will try to operate on inp. We need to stop that 3242 * from happening. But of course the iterator has a 3243 * reference on the stcb and inp. We can mark it and it will 3244 * stop. 3245 * 3246 * If its a single iterator situation, we set the end iterator 3247 * flag. Otherwise we set the iterator to go to the next 3248 * inp. 3249 * 3250 */ 3251 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3252 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3253 } else { 3254 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3255 } 3256 } 3257 /* 3258 * Now go through and remove any single reference to our inp that 3259 * may be still pending on the list 3260 */ 3261 SCTP_IPI_ITERATOR_WQ_LOCK(); 3262 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3263 if (it->vn != curvnet) { 3264 continue; 3265 } 3266 if (it->inp == inp) { 3267 /* This one points to me is it inp specific? */ 3268 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3269 /* Remove and free this one */ 3270 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3271 it, sctp_nxt_itr); 3272 if (it->function_atend != NULL) { 3273 (*it->function_atend) (it->pointer, it->val); 3274 } 3275 SCTP_FREE(it, SCTP_M_ITER); 3276 } else { 3277 it->inp = LIST_NEXT(it->inp, sctp_list); 3278 if (it->inp) { 3279 SCTP_INP_INCR_REF(it->inp); 3280 } 3281 } 3282 /* 3283 * When its put in the refcnt is incremented so decr 3284 * it 3285 */ 3286 SCTP_INP_DECR_REF(inp); 3287 } 3288 } 3289 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3290} 3291 3292/* release sctp_inpcb unbind the port */ 3293void 3294sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3295{ 3296 /* 3297 * Here we free a endpoint. We must find it (if it is in the Hash 3298 * table) and remove it from there. Then we must also find it in the 3299 * overall list and remove it from there. After all removals are 3300 * complete then any timer has to be stopped. Then start the actual 3301 * freeing. a) Any local lists. b) Any associations. c) The hash of 3302 * all associations. d) finally the ep itself. 3303 */ 3304 struct sctp_tcb *asoc, *nasoc; 3305 struct sctp_laddr *laddr, *nladdr; 3306 struct inpcb *ip_pcb; 3307 struct socket *so; 3308 int being_refed = 0; 3309 struct sctp_queued_to_read *sq, *nsq; 3310 int cnt; 3311 sctp_sharedkey_t *shared_key, *nshared_key; 3312 3313 3314#ifdef SCTP_LOG_CLOSING 3315 sctp_log_closing(inp, NULL, 0); 3316#endif 3317 SCTP_ITERATOR_LOCK(); 3318 /* mark any iterators on the list or being processed */ 3319 sctp_iterator_inp_being_freed(inp); 3320 SCTP_ITERATOR_UNLOCK(); 3321 so = inp->sctp_socket; 3322 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3323 /* been here before.. eeks.. get out of here */ 3324 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3325#ifdef SCTP_LOG_CLOSING 3326 sctp_log_closing(inp, NULL, 1); 3327#endif 3328 return; 3329 } 3330 SCTP_ASOC_CREATE_LOCK(inp); 3331 SCTP_INP_INFO_WLOCK(); 3332 3333 SCTP_INP_WLOCK(inp); 3334 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3335 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3336 /* socket is gone, so no more wakeups allowed */ 3337 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3338 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3339 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3340 3341 } 3342 /* First time through we have the socket lock, after that no more. */ 3343 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3344 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3345 3346 if (inp->control) { 3347 sctp_m_freem(inp->control); 3348 inp->control = NULL; 3349 } 3350 if (inp->pkt) { 3351 sctp_m_freem(inp->pkt); 3352 inp->pkt = NULL; 3353 } 3354 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3355 * here but I will be nice :> (i.e. 3356 * ip_pcb = ep;) */ 3357 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3358 int cnt_in_sd; 3359 3360 cnt_in_sd = 0; 3361 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3362 SCTP_TCB_LOCK(asoc); 3363 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3364 /* Skip guys being freed */ 3365 cnt_in_sd++; 3366 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3367 /* 3368 * Special case - we did not start a 3369 * kill timer on the asoc due to it 3370 * was not closed. So go ahead and 3371 * start it now. 3372 */ 3373 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3374 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3375 } 3376 SCTP_TCB_UNLOCK(asoc); 3377 continue; 3378 } 3379 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3380 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3381 (asoc->asoc.total_output_queue_size == 0)) { 3382 /* 3383 * If we have data in queue, we don't want 3384 * to just free since the app may have done, 3385 * send()/close or connect/send/close. And 3386 * it wants the data to get across first. 3387 */ 3388 /* Just abandon things in the front states */ 3389 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3390 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3391 cnt_in_sd++; 3392 } 3393 continue; 3394 } 3395 /* Disconnect the socket please */ 3396 asoc->sctp_socket = NULL; 3397 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3398 if ((asoc->asoc.size_on_reasm_queue > 0) || 3399 (asoc->asoc.control_pdapi) || 3400 (asoc->asoc.size_on_all_streams > 0) || 3401 (so && (so->so_rcv.sb_cc > 0))) { 3402 /* Left with Data unread */ 3403 struct mbuf *op_err; 3404 3405 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3406 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3407 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3408 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3409 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3410 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3411 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3412 } 3413 if (sctp_free_assoc(inp, asoc, 3414 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3415 cnt_in_sd++; 3416 } 3417 continue; 3418 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3419 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3420 (asoc->asoc.stream_queue_cnt == 0)) { 3421 if (asoc->asoc.locked_on_sending) { 3422 goto abort_anyway; 3423 } 3424 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3425 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3426 struct sctp_nets *netp; 3427 3428 /* 3429 * there is nothing queued to send, 3430 * so I send shutdown 3431 */ 3432 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3433 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3434 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3435 } 3436 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3437 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3438 sctp_stop_timers_for_shutdown(asoc); 3439 if (asoc->asoc.alternate) { 3440 netp = asoc->asoc.alternate; 3441 } else { 3442 netp = asoc->asoc.primary_destination; 3443 } 3444 sctp_send_shutdown(asoc, netp); 3445 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3446 netp); 3447 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3448 asoc->asoc.primary_destination); 3449 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3450 } 3451 } else { 3452 /* mark into shutdown pending */ 3453 struct sctp_stream_queue_pending *sp; 3454 3455 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3456 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3457 asoc->asoc.primary_destination); 3458 if (asoc->asoc.locked_on_sending) { 3459 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3460 sctp_streamhead); 3461 if (sp == NULL) { 3462 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3463 (void *)asoc->asoc.locked_on_sending, 3464 asoc->asoc.locked_on_sending->stream_no); 3465 } else { 3466 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3467 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3468 } 3469 } 3470 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3471 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3472 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3473 struct mbuf *op_err; 3474 3475 abort_anyway: 3476 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3477 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3478 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3479 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3480 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3481 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3482 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3483 } 3484 if (sctp_free_assoc(inp, asoc, 3485 SCTP_PCBFREE_NOFORCE, 3486 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3487 cnt_in_sd++; 3488 } 3489 continue; 3490 } else { 3491 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3492 } 3493 } 3494 cnt_in_sd++; 3495 SCTP_TCB_UNLOCK(asoc); 3496 } 3497 /* now is there some left in our SHUTDOWN state? */ 3498 if (cnt_in_sd) { 3499#ifdef SCTP_LOG_CLOSING 3500 sctp_log_closing(inp, NULL, 2); 3501#endif 3502 inp->sctp_socket = NULL; 3503 SCTP_INP_WUNLOCK(inp); 3504 SCTP_ASOC_CREATE_UNLOCK(inp); 3505 SCTP_INP_INFO_WUNLOCK(); 3506 return; 3507 } 3508 } 3509 inp->sctp_socket = NULL; 3510 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3511 SCTP_PCB_FLAGS_UNBOUND) { 3512 /* 3513 * ok, this guy has been bound. It's port is somewhere in 3514 * the SCTP_BASE_INFO(hash table). Remove it! 3515 */ 3516 LIST_REMOVE(inp, sctp_hash); 3517 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3518 } 3519 /* 3520 * If there is a timer running to kill us, forget it, since it may 3521 * have a contest on the INP lock.. which would cause us to die ... 3522 */ 3523 cnt = 0; 3524 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3525 SCTP_TCB_LOCK(asoc); 3526 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3527 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3528 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3529 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3530 } 3531 cnt++; 3532 SCTP_TCB_UNLOCK(asoc); 3533 continue; 3534 } 3535 /* Free associations that are NOT killing us */ 3536 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3537 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3538 struct mbuf *op_err; 3539 3540 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3541 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3542 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3543 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3544 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3545 cnt++; 3546 SCTP_TCB_UNLOCK(asoc); 3547 continue; 3548 } 3549 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3550 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3551 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3552 } 3553 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3554 cnt++; 3555 } 3556 } 3557 if (cnt) { 3558 /* Ok we have someone out there that will kill us */ 3559 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3560#ifdef SCTP_LOG_CLOSING 3561 sctp_log_closing(inp, NULL, 3); 3562#endif 3563 SCTP_INP_WUNLOCK(inp); 3564 SCTP_ASOC_CREATE_UNLOCK(inp); 3565 SCTP_INP_INFO_WUNLOCK(); 3566 return; 3567 } 3568 if (SCTP_INP_LOCK_CONTENDED(inp)) 3569 being_refed++; 3570 if (SCTP_INP_READ_CONTENDED(inp)) 3571 being_refed++; 3572 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3573 being_refed++; 3574 3575 if ((inp->refcount) || 3576 (being_refed) || 3577 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3578 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3579#ifdef SCTP_LOG_CLOSING 3580 sctp_log_closing(inp, NULL, 4); 3581#endif 3582 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3583 SCTP_INP_WUNLOCK(inp); 3584 SCTP_ASOC_CREATE_UNLOCK(inp); 3585 SCTP_INP_INFO_WUNLOCK(); 3586 return; 3587 } 3588 inp->sctp_ep.signature_change.type = 0; 3589 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3590 /* 3591 * Remove it from the list .. last thing we need a lock for. 3592 */ 3593 LIST_REMOVE(inp, sctp_list); 3594 SCTP_INP_WUNLOCK(inp); 3595 SCTP_ASOC_CREATE_UNLOCK(inp); 3596 SCTP_INP_INFO_WUNLOCK(); 3597 /* 3598 * Now we release all locks. Since this INP cannot be found anymore 3599 * except possibly by the kill timer that might be running. We call 3600 * the drain function here. It should hit the case were it sees the 3601 * ACTIVE flag cleared and exit out freeing us to proceed and 3602 * destroy everything. 3603 */ 3604 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3605 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3606 } else { 3607 /* Probably un-needed */ 3608 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3609 } 3610 3611#ifdef SCTP_LOG_CLOSING 3612 sctp_log_closing(inp, NULL, 5); 3613#endif 3614 3615 3616 if ((inp->sctp_asocidhash) != NULL) { 3617 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3618 inp->sctp_asocidhash = NULL; 3619 } 3620 /* sa_ignore FREED_MEMORY */ 3621 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3622 /* Its only abandoned if it had data left */ 3623 if (sq->length) 3624 SCTP_STAT_INCR(sctps_left_abandon); 3625 3626 TAILQ_REMOVE(&inp->read_queue, sq, next); 3627 sctp_free_remote_addr(sq->whoFrom); 3628 if (so) 3629 so->so_rcv.sb_cc -= sq->length; 3630 if (sq->data) { 3631 sctp_m_freem(sq->data); 3632 sq->data = NULL; 3633 } 3634 /* 3635 * no need to free the net count, since at this point all 3636 * assoc's are gone. 3637 */ 3638 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3639 SCTP_DECR_READQ_COUNT(); 3640 } 3641 /* Now the sctp_pcb things */ 3642 /* 3643 * free each asoc if it is not already closed/free. we can't use the 3644 * macro here since le_next will get freed as part of the 3645 * sctp_free_assoc() call. 3646 */ 3647 if (so) { 3648#ifdef IPSEC 3649 ipsec_delete_pcbpolicy(ip_pcb); 3650#endif /* IPSEC */ 3651 3652 /* Unlocks not needed since the socket is gone now */ 3653 } 3654 if (ip_pcb->inp_options) { 3655 (void)sctp_m_free(ip_pcb->inp_options); 3656 ip_pcb->inp_options = 0; 3657 } 3658#ifdef INET6 3659 if (ip_pcb->inp_vflag & INP_IPV6) { 3660 struct in6pcb *in6p; 3661 3662 in6p = (struct in6pcb *)inp; 3663 ip6_freepcbopts(in6p->in6p_outputopts); 3664 } 3665#endif /* INET6 */ 3666 ip_pcb->inp_vflag = 0; 3667 /* free up authentication fields */ 3668 if (inp->sctp_ep.local_auth_chunks != NULL) 3669 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3670 if (inp->sctp_ep.local_hmacs != NULL) 3671 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3672 3673 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3674 LIST_REMOVE(shared_key, next); 3675 sctp_free_sharedkey(shared_key); 3676 /* sa_ignore FREED_MEMORY */ 3677 } 3678 3679 /* 3680 * if we have an address list the following will free the list of 3681 * ifaddr's that are set into this ep. Again macro limitations here, 3682 * since the LIST_FOREACH could be a bad idea. 3683 */ 3684 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3685 sctp_remove_laddr(laddr); 3686 } 3687 3688#ifdef SCTP_TRACK_FREED_ASOCS 3689 /* TEMP CODE */ 3690 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3691 LIST_REMOVE(asoc, sctp_tcblist); 3692 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3693 SCTP_DECR_ASOC_COUNT(); 3694 } 3695 /* *** END TEMP CODE *** */ 3696#endif 3697 /* Now lets see about freeing the EP hash table. */ 3698 if (inp->sctp_tcbhash != NULL) { 3699 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3700 inp->sctp_tcbhash = NULL; 3701 } 3702 /* Now we must put the ep memory back into the zone pool */ 3703 crfree(inp->ip_inp.inp.inp_cred); 3704 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3705 SCTP_INP_LOCK_DESTROY(inp); 3706 SCTP_INP_READ_DESTROY(inp); 3707 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3708 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3709 SCTP_DECR_EP_COUNT(); 3710} 3711 3712 3713struct sctp_nets * 3714sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3715{ 3716 struct sctp_nets *net; 3717 3718 /* locate the address */ 3719 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3720 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3721 return (net); 3722 } 3723 return (NULL); 3724} 3725 3726 3727int 3728sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3729{ 3730 struct sctp_ifa *sctp_ifa; 3731 3732 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3733 if (sctp_ifa) { 3734 return (1); 3735 } else { 3736 return (0); 3737 } 3738} 3739 3740/* 3741 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3742 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3743 * stats of stuff. 3744 */ 3745int 3746sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3747 struct sctp_nets **netp, int set_scope, int from) 3748{ 3749 /* 3750 * The following is redundant to the same lines in the 3751 * sctp_aloc_assoc() but is needed since others call the add address 3752 * function 3753 */ 3754 struct sctp_nets *net, *netfirst; 3755 int addr_inscope; 3756 3757 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3758 from); 3759 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3760 3761 netfirst = sctp_findnet(stcb, newaddr); 3762 if (netfirst) { 3763 /* 3764 * Lie and return ok, we don't want to make the association 3765 * go away for this behavior. It will happen in the TCP 3766 * model in a connected socket. It does not reach the hash 3767 * table until after the association is built so it can't be 3768 * found. Mark as reachable, since the initial creation will 3769 * have been cleared and the NOT_IN_ASSOC flag will have 3770 * been added... and we don't want to end up removing it 3771 * back out. 3772 */ 3773 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3774 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3775 SCTP_ADDR_UNCONFIRMED); 3776 } else { 3777 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3778 } 3779 3780 return (0); 3781 } 3782 addr_inscope = 1; 3783 switch (newaddr->sa_family) { 3784#ifdef INET 3785 case AF_INET: 3786 { 3787 struct sockaddr_in *sin; 3788 3789 sin = (struct sockaddr_in *)newaddr; 3790 if (sin->sin_addr.s_addr == 0) { 3791 /* Invalid address */ 3792 return (-1); 3793 } 3794 /* zero out the bzero area */ 3795 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3796 3797 /* assure len is set */ 3798 sin->sin_len = sizeof(struct sockaddr_in); 3799 if (set_scope) { 3800#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3801 stcb->asoc.scope.ipv4_local_scope = 1; 3802#else 3803 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3804 stcb->asoc.scope.ipv4_local_scope = 1; 3805 } 3806#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3807 } else { 3808 /* Validate the address is in scope */ 3809 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3810 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3811 addr_inscope = 0; 3812 } 3813 } 3814 break; 3815 } 3816#endif 3817#ifdef INET6 3818 case AF_INET6: 3819 { 3820 struct sockaddr_in6 *sin6; 3821 3822 sin6 = (struct sockaddr_in6 *)newaddr; 3823 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3824 /* Invalid address */ 3825 return (-1); 3826 } 3827 /* assure len is set */ 3828 sin6->sin6_len = sizeof(struct sockaddr_in6); 3829 if (set_scope) { 3830 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3831 stcb->asoc.scope.loopback_scope = 1; 3832 stcb->asoc.scope.local_scope = 0; 3833 stcb->asoc.scope.ipv4_local_scope = 1; 3834 stcb->asoc.scope.site_scope = 1; 3835 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3836 /* 3837 * If the new destination is a 3838 * LINK_LOCAL we must have common 3839 * site scope. Don't set the local 3840 * scope since we may not share all 3841 * links, only loopback can do this. 3842 * Links on the local network would 3843 * also be on our private network 3844 * for v4 too. 3845 */ 3846 stcb->asoc.scope.ipv4_local_scope = 1; 3847 stcb->asoc.scope.site_scope = 1; 3848 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3849 /* 3850 * If the new destination is 3851 * SITE_LOCAL then we must have site 3852 * scope in common. 3853 */ 3854 stcb->asoc.scope.site_scope = 1; 3855 } 3856 } else { 3857 /* Validate the address is in scope */ 3858 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3859 (stcb->asoc.scope.loopback_scope == 0)) { 3860 addr_inscope = 0; 3861 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3862 (stcb->asoc.scope.local_scope == 0)) { 3863 addr_inscope = 0; 3864 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3865 (stcb->asoc.scope.site_scope == 0)) { 3866 addr_inscope = 0; 3867 } 3868 } 3869 break; 3870 } 3871#endif 3872 default: 3873 /* not supported family type */ 3874 return (-1); 3875 } 3876 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3877 if (net == NULL) { 3878 return (-1); 3879 } 3880 SCTP_INCR_RADDR_COUNT(); 3881 bzero(net, sizeof(struct sctp_nets)); 3882 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3883 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3884 switch (newaddr->sa_family) { 3885#ifdef INET 3886 case AF_INET: 3887 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3888 break; 3889#endif 3890#ifdef INET6 3891 case AF_INET6: 3892 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3893 break; 3894#endif 3895 default: 3896 break; 3897 } 3898 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3899 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3900 stcb->asoc.scope.loopback_scope = 1; 3901 stcb->asoc.scope.ipv4_local_scope = 1; 3902 stcb->asoc.scope.local_scope = 0; 3903 stcb->asoc.scope.site_scope = 1; 3904 addr_inscope = 1; 3905 } 3906 net->failure_threshold = stcb->asoc.def_net_failure; 3907 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3908 if (addr_inscope == 0) { 3909 net->dest_state = (SCTP_ADDR_REACHABLE | 3910 SCTP_ADDR_OUT_OF_SCOPE); 3911 } else { 3912 if (from == SCTP_ADDR_IS_CONFIRMED) 3913 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3914 net->dest_state = SCTP_ADDR_REACHABLE; 3915 else 3916 net->dest_state = SCTP_ADDR_REACHABLE | 3917 SCTP_ADDR_UNCONFIRMED; 3918 } 3919 /* 3920 * We set this to 0, the timer code knows that this means its an 3921 * initial value 3922 */ 3923 net->rto_needed = 1; 3924 net->RTO = 0; 3925 net->RTO_measured = 0; 3926 stcb->asoc.numnets++; 3927 net->ref_count = 1; 3928 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3929 net->port = stcb->asoc.port; 3930 net->dscp = stcb->asoc.default_dscp; 3931#ifdef INET6 3932 net->flowlabel = stcb->asoc.default_flowlabel; 3933#endif 3934 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3935 net->dest_state |= SCTP_ADDR_NOHB; 3936 } else { 3937 net->dest_state &= ~SCTP_ADDR_NOHB; 3938 } 3939 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3940 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3941 } else { 3942 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3943 } 3944 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3945 /* Init the timer structure */ 3946 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3947 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3948 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3949 3950 /* Now generate a route for this guy */ 3951#ifdef INET6 3952 /* KAME hack: embed scopeid */ 3953 if (newaddr->sa_family == AF_INET6) { 3954 struct sockaddr_in6 *sin6; 3955 3956 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3957 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3958 sin6->sin6_scope_id = 0; 3959 } 3960#endif 3961 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3962 3963 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3964 /* Get source address */ 3965 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3966 stcb, 3967 (sctp_route_t *) & net->ro, 3968 net, 3969 0, 3970 stcb->asoc.vrf_id); 3971 /* Now get the interface MTU */ 3972 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3973 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3974 } 3975 if (net->mtu > 0) { 3976 uint32_t rmtu; 3977 3978 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3979 if (rmtu == 0) { 3980 /* 3981 * Start things off to match mtu of 3982 * interface please. 3983 */ 3984 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3985 net->ro.ro_rt, net->mtu); 3986 } else { 3987 /* 3988 * we take the route mtu over the interface, 3989 * since the route may be leading out the 3990 * loopback, or a different interface. 3991 */ 3992 net->mtu = rmtu; 3993 } 3994 } 3995 } 3996 if (net->mtu == 0) { 3997 switch (newaddr->sa_family) { 3998#ifdef INET 3999 case AF_INET: 4000 net->mtu = SCTP_DEFAULT_MTU; 4001 break; 4002#endif 4003#ifdef INET6 4004 case AF_INET6: 4005 net->mtu = 1280; 4006 break; 4007#endif 4008 default: 4009 break; 4010 } 4011 } 4012#if defined(INET) || defined(INET6) 4013 if (net->port) { 4014 net->mtu -= (uint32_t) sizeof(struct udphdr); 4015 } 4016#endif 4017 if (from == SCTP_ALLOC_ASOC) { 4018 stcb->asoc.smallest_mtu = net->mtu; 4019 } 4020 if (stcb->asoc.smallest_mtu > net->mtu) { 4021 stcb->asoc.smallest_mtu = net->mtu; 4022 } 4023#ifdef INET6 4024 if (newaddr->sa_family == AF_INET6) { 4025 struct sockaddr_in6 *sin6; 4026 4027 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4028 (void)sa6_recoverscope(sin6); 4029 } 4030#endif 4031 4032 /* JRS - Use the congestion control given in the CC module */ 4033 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4034 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4035 4036 /* 4037 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4038 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4039 */ 4040 net->find_pseudo_cumack = 1; 4041 net->find_rtx_pseudo_cumack = 1; 4042 net->src_addr_selected = 0; 4043 /* Choose an initial flowid. */ 4044 net->flowid = stcb->asoc.my_vtag ^ 4045 ntohs(stcb->rport) ^ 4046 ntohs(stcb->sctp_ep->sctp_lport); 4047#ifdef INVARIANTS 4048 net->flowidset = 1; 4049#endif 4050 if (netp) { 4051 *netp = net; 4052 } 4053 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4054 if (net->ro.ro_rt == NULL) { 4055 /* Since we have no route put it at the back */ 4056 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4057 } else if (netfirst == NULL) { 4058 /* We are the first one in the pool. */ 4059 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4060 } else if (netfirst->ro.ro_rt == NULL) { 4061 /* 4062 * First one has NO route. Place this one ahead of the first 4063 * one. 4064 */ 4065 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4066 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4067 /* 4068 * This one has a different interface than the one at the 4069 * top of the list. Place it ahead. 4070 */ 4071 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4072 } else { 4073 /* 4074 * Ok we have the same interface as the first one. Move 4075 * forward until we find either a) one with a NULL route... 4076 * insert ahead of that b) one with a different ifp.. insert 4077 * after that. c) end of the list.. insert at the tail. 4078 */ 4079 struct sctp_nets *netlook; 4080 4081 do { 4082 netlook = TAILQ_NEXT(netfirst, sctp_next); 4083 if (netlook == NULL) { 4084 /* End of the list */ 4085 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4086 break; 4087 } else if (netlook->ro.ro_rt == NULL) { 4088 /* next one has NO route */ 4089 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4090 break; 4091 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4092 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4093 net, sctp_next); 4094 break; 4095 } 4096 /* Shift forward */ 4097 netfirst = netlook; 4098 } while (netlook != NULL); 4099 } 4100 4101 /* got to have a primary set */ 4102 if (stcb->asoc.primary_destination == 0) { 4103 stcb->asoc.primary_destination = net; 4104 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4105 (net->ro.ro_rt) && 4106 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4107 /* No route to current primary adopt new primary */ 4108 stcb->asoc.primary_destination = net; 4109 } 4110 /* Validate primary is first */ 4111 net = TAILQ_FIRST(&stcb->asoc.nets); 4112 if ((net != stcb->asoc.primary_destination) && 4113 (stcb->asoc.primary_destination)) { 4114 /* 4115 * first one on the list is NOT the primary sctp_cmpaddr() 4116 * is much more efficient if the primary is the first on the 4117 * list, make it so. 4118 */ 4119 TAILQ_REMOVE(&stcb->asoc.nets, 4120 stcb->asoc.primary_destination, sctp_next); 4121 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4122 stcb->asoc.primary_destination, sctp_next); 4123 } 4124 return (0); 4125} 4126 4127 4128static uint32_t 4129sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4130{ 4131 uint32_t id; 4132 struct sctpasochead *head; 4133 struct sctp_tcb *lstcb; 4134 4135 SCTP_INP_WLOCK(inp); 4136try_again: 4137 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4138 /* TSNH */ 4139 SCTP_INP_WUNLOCK(inp); 4140 return (0); 4141 } 4142 /* 4143 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4144 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4145 */ 4146 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4147 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4148 } 4149 id = inp->sctp_associd_counter; 4150 inp->sctp_associd_counter++; 4151 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4152 if (lstcb) { 4153 goto try_again; 4154 } 4155 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4156 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4157 stcb->asoc.in_asocid_hash = 1; 4158 SCTP_INP_WUNLOCK(inp); 4159 return id; 4160} 4161 4162/* 4163 * allocate an association and add it to the endpoint. The caller must be 4164 * careful to add all additional addresses once they are know right away or 4165 * else the assoc will be may experience a blackout scenario. 4166 */ 4167struct sctp_tcb * 4168sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4169 int *error, uint32_t override_tag, uint32_t vrf_id, 4170 struct thread *p 4171) 4172{ 4173 /* note the p argument is only valid in unbound sockets */ 4174 4175 struct sctp_tcb *stcb; 4176 struct sctp_association *asoc; 4177 struct sctpasochead *head; 4178 uint16_t rport; 4179 int err; 4180 4181 /* 4182 * Assumption made here: Caller has done a 4183 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4184 * address does not exist already. 4185 */ 4186 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4187 /* Hit max assoc, sorry no more */ 4188 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4189 *error = ENOBUFS; 4190 return (NULL); 4191 } 4192 if (firstaddr == NULL) { 4193 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4194 *error = EINVAL; 4195 return (NULL); 4196 } 4197 SCTP_INP_RLOCK(inp); 4198 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4199 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4200 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4201 /* 4202 * If its in the TCP pool, its NOT allowed to create an 4203 * association. The parent listener needs to call 4204 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4205 * off, or connected one does this.. its an error. 4206 */ 4207 SCTP_INP_RUNLOCK(inp); 4208 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4209 *error = EINVAL; 4210 return (NULL); 4211 } 4212 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4213 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4214 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4215 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4216 SCTP_INP_RUNLOCK(inp); 4217 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4218 *error = EINVAL; 4219 return (NULL); 4220 } 4221 } 4222 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4223#ifdef SCTP_DEBUG 4224 if (firstaddr) { 4225 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4226 switch (firstaddr->sa_family) { 4227#ifdef INET 4228 case AF_INET: 4229 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4230 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4231 break; 4232#endif 4233#ifdef INET6 4234 case AF_INET6: 4235 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4236 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4237 break; 4238#endif 4239 default: 4240 break; 4241 } 4242 } else { 4243 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4244 } 4245#endif /* SCTP_DEBUG */ 4246 switch (firstaddr->sa_family) { 4247#ifdef INET 4248 case AF_INET: 4249 { 4250 struct sockaddr_in *sin; 4251 4252 sin = (struct sockaddr_in *)firstaddr; 4253 if ((ntohs(sin->sin_port) == 0) || 4254 (sin->sin_addr.s_addr == INADDR_ANY) || 4255 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4256 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4257 /* Invalid address */ 4258 SCTP_INP_RUNLOCK(inp); 4259 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4260 *error = EINVAL; 4261 return (NULL); 4262 } 4263 rport = sin->sin_port; 4264 break; 4265 } 4266#endif 4267#ifdef INET6 4268 case AF_INET6: 4269 { 4270 struct sockaddr_in6 *sin6; 4271 4272 sin6 = (struct sockaddr_in6 *)firstaddr; 4273 if ((ntohs(sin6->sin6_port) == 0) || 4274 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4275 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4276 /* Invalid address */ 4277 SCTP_INP_RUNLOCK(inp); 4278 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4279 *error = EINVAL; 4280 return (NULL); 4281 } 4282 rport = sin6->sin6_port; 4283 break; 4284 } 4285#endif 4286 default: 4287 /* not supported family type */ 4288 SCTP_INP_RUNLOCK(inp); 4289 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4290 *error = EINVAL; 4291 return (NULL); 4292 } 4293 SCTP_INP_RUNLOCK(inp); 4294 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4295 /* 4296 * If you have not performed a bind, then we need to do the 4297 * ephemeral bind for you. 4298 */ 4299 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4300 (struct sockaddr *)NULL, 4301 (struct sctp_ifa *)NULL, 4302 p 4303 ))) { 4304 /* bind error, probably perm */ 4305 *error = err; 4306 return (NULL); 4307 } 4308 } 4309 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4310 if (stcb == NULL) { 4311 /* out of memory? */ 4312 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4313 *error = ENOMEM; 4314 return (NULL); 4315 } 4316 SCTP_INCR_ASOC_COUNT(); 4317 4318 bzero(stcb, sizeof(*stcb)); 4319 asoc = &stcb->asoc; 4320 4321 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4322 SCTP_TCB_LOCK_INIT(stcb); 4323 SCTP_TCB_SEND_LOCK_INIT(stcb); 4324 stcb->rport = rport; 4325 /* setup back pointer's */ 4326 stcb->sctp_ep = inp; 4327 stcb->sctp_socket = inp->sctp_socket; 4328 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4329 /* failed */ 4330 SCTP_TCB_LOCK_DESTROY(stcb); 4331 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4332 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4333 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4334 SCTP_DECR_ASOC_COUNT(); 4335 *error = err; 4336 return (NULL); 4337 } 4338 /* and the port */ 4339 SCTP_INP_INFO_WLOCK(); 4340 SCTP_INP_WLOCK(inp); 4341 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4342 /* inpcb freed while alloc going on */ 4343 SCTP_TCB_LOCK_DESTROY(stcb); 4344 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4345 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4346 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4347 SCTP_INP_WUNLOCK(inp); 4348 SCTP_INP_INFO_WUNLOCK(); 4349 SCTP_DECR_ASOC_COUNT(); 4350 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4351 *error = EINVAL; 4352 return (NULL); 4353 } 4354 SCTP_TCB_LOCK(stcb); 4355 4356 /* now that my_vtag is set, add it to the hash */ 4357 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4358 /* put it in the bucket in the vtag hash of assoc's for the system */ 4359 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4360 SCTP_INP_INFO_WUNLOCK(); 4361 4362 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4363 /* failure.. memory error? */ 4364 if (asoc->strmout) { 4365 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4366 asoc->strmout = NULL; 4367 } 4368 if (asoc->mapping_array) { 4369 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4370 asoc->mapping_array = NULL; 4371 } 4372 if (asoc->nr_mapping_array) { 4373 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4374 asoc->nr_mapping_array = NULL; 4375 } 4376 SCTP_DECR_ASOC_COUNT(); 4377 SCTP_TCB_UNLOCK(stcb); 4378 SCTP_TCB_LOCK_DESTROY(stcb); 4379 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4380 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4381 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4382 SCTP_INP_WUNLOCK(inp); 4383 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4384 *error = ENOBUFS; 4385 return (NULL); 4386 } 4387 /* Init all the timers */ 4388 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4389 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4390 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4391 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4392 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4393 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4394 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4395 4396 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4397 /* now file the port under the hash as well */ 4398 if (inp->sctp_tcbhash != NULL) { 4399 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4400 inp->sctp_hashmark)]; 4401 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4402 } 4403 SCTP_INP_WUNLOCK(inp); 4404 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4405 return (stcb); 4406} 4407 4408 4409void 4410sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4411{ 4412 struct sctp_association *asoc; 4413 4414 asoc = &stcb->asoc; 4415 asoc->numnets--; 4416 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4417 if (net == asoc->primary_destination) { 4418 /* Reset primary */ 4419 struct sctp_nets *lnet; 4420 4421 lnet = TAILQ_FIRST(&asoc->nets); 4422 /* 4423 * Mobility adaptation Ideally, if deleted destination is 4424 * the primary, it becomes a fast retransmission trigger by 4425 * the subsequent SET PRIMARY. (by micchie) 4426 */ 4427 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4428 SCTP_MOBILITY_BASE) || 4429 sctp_is_mobility_feature_on(stcb->sctp_ep, 4430 SCTP_MOBILITY_FASTHANDOFF)) { 4431 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4432 if (asoc->deleted_primary != NULL) { 4433 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4434 goto out; 4435 } 4436 asoc->deleted_primary = net; 4437 atomic_add_int(&net->ref_count, 1); 4438 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4439 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4440 sctp_mobility_feature_on(stcb->sctp_ep, 4441 SCTP_MOBILITY_PRIM_DELETED); 4442 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4443 stcb->sctp_ep, stcb, NULL); 4444 } 4445out: 4446 /* Try to find a confirmed primary */ 4447 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4448 } 4449 if (net == asoc->last_data_chunk_from) { 4450 /* Reset primary */ 4451 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4452 } 4453 if (net == asoc->last_control_chunk_from) { 4454 /* Clear net */ 4455 asoc->last_control_chunk_from = NULL; 4456 } 4457 if (net == stcb->asoc.alternate) { 4458 sctp_free_remote_addr(stcb->asoc.alternate); 4459 stcb->asoc.alternate = NULL; 4460 } 4461 sctp_free_remote_addr(net); 4462} 4463 4464/* 4465 * remove a remote endpoint address from an association, it will fail if the 4466 * address does not exist. 4467 */ 4468int 4469sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4470{ 4471 /* 4472 * Here we need to remove a remote address. This is quite simple, we 4473 * first find it in the list of address for the association 4474 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4475 * on that item. Note we do not allow it to be removed if there are 4476 * no other addresses. 4477 */ 4478 struct sctp_association *asoc; 4479 struct sctp_nets *net, *nnet; 4480 4481 asoc = &stcb->asoc; 4482 4483 /* locate the address */ 4484 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4485 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4486 continue; 4487 } 4488 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4489 remaddr)) { 4490 /* we found the guy */ 4491 if (asoc->numnets < 2) { 4492 /* Must have at LEAST two remote addresses */ 4493 return (-1); 4494 } else { 4495 sctp_remove_net(stcb, net); 4496 return (0); 4497 } 4498 } 4499 } 4500 /* not found. */ 4501 return (-2); 4502} 4503 4504void 4505sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4506{ 4507 struct sctpvtaghead *chain; 4508 struct sctp_tagblock *twait_block; 4509 int found = 0; 4510 int i; 4511 4512 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4513 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4514 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4515 if ((twait_block->vtag_block[i].v_tag == tag) && 4516 (twait_block->vtag_block[i].lport == lport) && 4517 (twait_block->vtag_block[i].rport == rport)) { 4518 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4519 twait_block->vtag_block[i].v_tag = 0; 4520 twait_block->vtag_block[i].lport = 0; 4521 twait_block->vtag_block[i].rport = 0; 4522 found = 1; 4523 break; 4524 } 4525 } 4526 if (found) 4527 break; 4528 } 4529} 4530 4531int 4532sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4533{ 4534 struct sctpvtaghead *chain; 4535 struct sctp_tagblock *twait_block; 4536 int found = 0; 4537 int i; 4538 4539 SCTP_INP_INFO_WLOCK(); 4540 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4541 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4542 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4543 if ((twait_block->vtag_block[i].v_tag == tag) && 4544 (twait_block->vtag_block[i].lport == lport) && 4545 (twait_block->vtag_block[i].rport == rport)) { 4546 found = 1; 4547 break; 4548 } 4549 } 4550 if (found) 4551 break; 4552 } 4553 SCTP_INP_INFO_WUNLOCK(); 4554 return (found); 4555} 4556 4557 4558void 4559sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4560{ 4561 struct sctpvtaghead *chain; 4562 struct sctp_tagblock *twait_block; 4563 struct timeval now; 4564 int set, i; 4565 4566 if (time == 0) { 4567 /* Its disabled */ 4568 return; 4569 } 4570 (void)SCTP_GETTIME_TIMEVAL(&now); 4571 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4572 set = 0; 4573 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4574 /* Block(s) present, lets find space, and expire on the fly */ 4575 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4576 if ((twait_block->vtag_block[i].v_tag == 0) && 4577 !set) { 4578 twait_block->vtag_block[i].tv_sec_at_expire = 4579 now.tv_sec + time; 4580 twait_block->vtag_block[i].v_tag = tag; 4581 twait_block->vtag_block[i].lport = lport; 4582 twait_block->vtag_block[i].rport = rport; 4583 set = 1; 4584 } else if ((twait_block->vtag_block[i].v_tag) && 4585 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4586 /* Audit expires this guy */ 4587 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4588 twait_block->vtag_block[i].v_tag = 0; 4589 twait_block->vtag_block[i].lport = 0; 4590 twait_block->vtag_block[i].rport = 0; 4591 if (set == 0) { 4592 /* Reuse it for my new tag */ 4593 twait_block->vtag_block[i].tv_sec_at_expire = 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 } 4599 } 4600 } 4601 if (set) { 4602 /* 4603 * We only do up to the block where we can place our 4604 * tag for audits 4605 */ 4606 break; 4607 } 4608 } 4609 /* Need to add a new block to chain */ 4610 if (!set) { 4611 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4612 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4613 if (twait_block == NULL) { 4614#ifdef INVARIANTS 4615 panic("Can not alloc tagblock"); 4616#endif 4617 return; 4618 } 4619 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4620 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4621 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4622 twait_block->vtag_block[0].v_tag = tag; 4623 twait_block->vtag_block[0].lport = lport; 4624 twait_block->vtag_block[0].rport = rport; 4625 } 4626} 4627 4628 4629 4630/*- 4631 * Free the association after un-hashing the remote port. This 4632 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4633 * expect that the input to this function IS a locked TCB. 4634 * It will return 0, if it did NOT destroy the association (instead 4635 * it unlocks it. It will return NON-zero if it either destroyed the 4636 * association OR the association is already destroyed. 4637 */ 4638int 4639sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4640{ 4641 int i; 4642 struct sctp_association *asoc; 4643 struct sctp_nets *net, *nnet; 4644 struct sctp_laddr *laddr, *naddr; 4645 struct sctp_tmit_chunk *chk, *nchk; 4646 struct sctp_asconf_addr *aparam, *naparam; 4647 struct sctp_asconf_ack *aack, *naack; 4648 struct sctp_stream_reset_list *strrst, *nstrrst; 4649 struct sctp_queued_to_read *sq, *nsq; 4650 struct sctp_stream_queue_pending *sp, *nsp; 4651 sctp_sharedkey_t *shared_key, *nshared_key; 4652 struct socket *so; 4653 4654 /* first, lets purge the entry from the hash table. */ 4655 4656#ifdef SCTP_LOG_CLOSING 4657 sctp_log_closing(inp, stcb, 6); 4658#endif 4659 if (stcb->asoc.state == 0) { 4660#ifdef SCTP_LOG_CLOSING 4661 sctp_log_closing(inp, NULL, 7); 4662#endif 4663 /* there is no asoc, really TSNH :-0 */ 4664 return (1); 4665 } 4666 if (stcb->asoc.alternate) { 4667 sctp_free_remote_addr(stcb->asoc.alternate); 4668 stcb->asoc.alternate = NULL; 4669 } 4670 /* TEMP CODE */ 4671 if (stcb->freed_from_where == 0) { 4672 /* Only record the first place free happened from */ 4673 stcb->freed_from_where = from_location; 4674 } 4675 /* TEMP CODE */ 4676 4677 asoc = &stcb->asoc; 4678 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4679 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4680 /* nothing around */ 4681 so = NULL; 4682 else 4683 so = inp->sctp_socket; 4684 4685 /* 4686 * We used timer based freeing if a reader or writer is in the way. 4687 * So we first check if we are actually being called from a timer, 4688 * if so we abort early if a reader or writer is still in the way. 4689 */ 4690 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4691 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4692 /* 4693 * is it the timer driving us? if so are the reader/writers 4694 * gone? 4695 */ 4696 if (stcb->asoc.refcnt) { 4697 /* nope, reader or writer in the way */ 4698 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4699 /* no asoc destroyed */ 4700 SCTP_TCB_UNLOCK(stcb); 4701#ifdef SCTP_LOG_CLOSING 4702 sctp_log_closing(inp, stcb, 8); 4703#endif 4704 return (0); 4705 } 4706 } 4707 /* now clean up any other timers */ 4708 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4709 asoc->dack_timer.self = NULL; 4710 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4711 /*- 4712 * For stream reset we don't blast this unless 4713 * it is a str-reset timer, it might be the 4714 * free-asoc timer which we DON'T want to 4715 * disturb. 4716 */ 4717 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4718 asoc->strreset_timer.self = NULL; 4719 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4720 asoc->asconf_timer.self = NULL; 4721 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4722 asoc->autoclose_timer.self = NULL; 4723 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4724 asoc->shut_guard_timer.self = NULL; 4725 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4726 asoc->delayed_event_timer.self = NULL; 4727 /* Mobility adaptation */ 4728 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4729 asoc->delete_prim_timer.self = NULL; 4730 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4731 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4732 net->rxt_timer.self = NULL; 4733 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4734 net->pmtu_timer.self = NULL; 4735 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4736 net->hb_timer.self = NULL; 4737 } 4738 /* Now the read queue needs to be cleaned up (only once) */ 4739 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4740 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4741 SCTP_INP_READ_LOCK(inp); 4742 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4743 if (sq->stcb == stcb) { 4744 sq->do_not_ref_stcb = 1; 4745 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4746 /* 4747 * If there is no end, there never will be 4748 * now. 4749 */ 4750 if (sq->end_added == 0) { 4751 /* Held for PD-API clear that. */ 4752 sq->pdapi_aborted = 1; 4753 sq->held_length = 0; 4754 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4755 /* 4756 * Need to add a PD-API 4757 * aborted indication. 4758 * Setting the control_pdapi 4759 * assures that it will be 4760 * added right after this 4761 * msg. 4762 */ 4763 uint32_t strseq; 4764 4765 stcb->asoc.control_pdapi = sq; 4766 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4767 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4768 stcb, 4769 SCTP_PARTIAL_DELIVERY_ABORTED, 4770 (void *)&strseq, 4771 SCTP_SO_LOCKED); 4772 stcb->asoc.control_pdapi = NULL; 4773 } 4774 } 4775 /* Add an end to wake them */ 4776 sq->end_added = 1; 4777 } 4778 } 4779 SCTP_INP_READ_UNLOCK(inp); 4780 if (stcb->block_entry) { 4781 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4782 stcb->block_entry->error = ECONNRESET; 4783 stcb->block_entry = NULL; 4784 } 4785 } 4786 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4787 /* 4788 * Someone holds a reference OR the socket is unaccepted 4789 * yet. 4790 */ 4791 if ((stcb->asoc.refcnt) || 4792 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4793 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4794 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4795 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4796 } 4797 SCTP_TCB_UNLOCK(stcb); 4798 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4799 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4800 /* nothing around */ 4801 so = NULL; 4802 if (so) { 4803 /* Wake any reader/writers */ 4804 sctp_sorwakeup(inp, so); 4805 sctp_sowwakeup(inp, so); 4806 } 4807#ifdef SCTP_LOG_CLOSING 4808 sctp_log_closing(inp, stcb, 9); 4809#endif 4810 /* no asoc destroyed */ 4811 return (0); 4812 } 4813#ifdef SCTP_LOG_CLOSING 4814 sctp_log_closing(inp, stcb, 10); 4815#endif 4816 /* 4817 * When I reach here, no others want to kill the assoc yet.. and I 4818 * own the lock. Now its possible an abort comes in when I do the 4819 * lock exchange below to grab all the locks to do the final take 4820 * out. to prevent this we increment the count, which will start a 4821 * timer and blow out above thus assuring us that we hold exclusive 4822 * killing of the asoc. Note that after getting back the TCB lock we 4823 * will go ahead and increment the counter back up and stop any 4824 * timer a passing stranger may have started :-S 4825 */ 4826 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4827 atomic_add_int(&stcb->asoc.refcnt, 1); 4828 4829 SCTP_TCB_UNLOCK(stcb); 4830 SCTP_INP_INFO_WLOCK(); 4831 SCTP_INP_WLOCK(inp); 4832 SCTP_TCB_LOCK(stcb); 4833 } 4834 /* Double check the GONE flag */ 4835 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4836 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4837 /* nothing around */ 4838 so = NULL; 4839 4840 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4841 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4842 /* 4843 * For TCP type we need special handling when we are 4844 * connected. We also include the peel'ed off ones to. 4845 */ 4846 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4847 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4848 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4849 if (so) { 4850 SOCK_LOCK(so); 4851 if (so->so_rcv.sb_cc == 0) { 4852 so->so_state &= ~(SS_ISCONNECTING | 4853 SS_ISDISCONNECTING | 4854 SS_ISCONFIRMING | 4855 SS_ISCONNECTED); 4856 } 4857 socantrcvmore_locked(so); 4858 sctp_sowwakeup(inp, so); 4859 sctp_sorwakeup(inp, so); 4860 SCTP_SOWAKEUP(so); 4861 } 4862 } 4863 } 4864 /* 4865 * Make it invalid too, that way if its about to run it will abort 4866 * and return. 4867 */ 4868 /* re-increment the lock */ 4869 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4870 atomic_add_int(&stcb->asoc.refcnt, -1); 4871 } 4872 if (stcb->asoc.refcnt) { 4873 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4874 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4875 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4876 SCTP_INP_INFO_WUNLOCK(); 4877 SCTP_INP_WUNLOCK(inp); 4878 } 4879 SCTP_TCB_UNLOCK(stcb); 4880 return (0); 4881 } 4882 asoc->state = 0; 4883 if (inp->sctp_tcbhash) { 4884 LIST_REMOVE(stcb, sctp_tcbhash); 4885 } 4886 if (stcb->asoc.in_asocid_hash) { 4887 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4888 } 4889 /* Now lets remove it from the list of ALL associations in the EP */ 4890 LIST_REMOVE(stcb, sctp_tcblist); 4891 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4892 SCTP_INP_INCR_REF(inp); 4893 SCTP_INP_WUNLOCK(inp); 4894 } 4895 /* pull from vtag hash */ 4896 LIST_REMOVE(stcb, sctp_asocs); 4897 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4898 inp->sctp_lport, stcb->rport); 4899 4900 /* 4901 * Now restop the timers to be sure this is paranoia at is finest! 4902 */ 4903 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4904 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4905 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4906 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4907 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4908 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4909 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4910 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4911 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4912 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4913 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4914 } 4915 4916 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4917 /* 4918 * The chunk lists and such SHOULD be empty but we check them just 4919 * in case. 4920 */ 4921 /* anything on the wheel needs to be removed */ 4922 for (i = 0; i < asoc->streamoutcnt; i++) { 4923 struct sctp_stream_out *outs; 4924 4925 outs = &asoc->strmout[i]; 4926 /* now clean up any chunks here */ 4927 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4928 TAILQ_REMOVE(&outs->outqueue, sp, next); 4929 sctp_free_spbufspace(stcb, asoc, sp); 4930 if (sp->data) { 4931 if (so) { 4932 /* Still an open socket - report */ 4933 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4934 0, (void *)sp, SCTP_SO_LOCKED); 4935 } 4936 if (sp->data) { 4937 sctp_m_freem(sp->data); 4938 sp->data = NULL; 4939 sp->tail_mbuf = NULL; 4940 sp->length = 0; 4941 } 4942 } 4943 if (sp->net) { 4944 sctp_free_remote_addr(sp->net); 4945 sp->net = NULL; 4946 } 4947 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4948 } 4949 } 4950 /* sa_ignore FREED_MEMORY */ 4951 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4952 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4953 SCTP_FREE(strrst, SCTP_M_STRESET); 4954 } 4955 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4956 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4957 if (sq->data) { 4958 sctp_m_freem(sq->data); 4959 sq->data = NULL; 4960 } 4961 sctp_free_remote_addr(sq->whoFrom); 4962 sq->whoFrom = NULL; 4963 sq->stcb = NULL; 4964 /* Free the ctl entry */ 4965 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4966 SCTP_DECR_READQ_COUNT(); 4967 /* sa_ignore FREED_MEMORY */ 4968 } 4969 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4970 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4971 if (chk->data) { 4972 sctp_m_freem(chk->data); 4973 chk->data = NULL; 4974 } 4975 if (chk->holds_key_ref) 4976 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4977 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4978 SCTP_DECR_CHK_COUNT(); 4979 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4980 asoc->free_chunk_cnt--; 4981 /* sa_ignore FREED_MEMORY */ 4982 } 4983 /* pending send queue SHOULD be empty */ 4984 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4985 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4986 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4987#ifdef INVARIANTS 4988 } else { 4989 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4990#endif 4991 } 4992 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4993 if (chk->data) { 4994 if (so) { 4995 /* Still a socket? */ 4996 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4997 0, chk, SCTP_SO_LOCKED); 4998 } 4999 if (chk->data) { 5000 sctp_m_freem(chk->data); 5001 chk->data = NULL; 5002 } 5003 } 5004 if (chk->holds_key_ref) 5005 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5006 if (chk->whoTo) { 5007 sctp_free_remote_addr(chk->whoTo); 5008 chk->whoTo = NULL; 5009 } 5010 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5011 SCTP_DECR_CHK_COUNT(); 5012 /* sa_ignore FREED_MEMORY */ 5013 } 5014 /* sent queue SHOULD be empty */ 5015 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5016 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5017 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5018 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5019#ifdef INVARIANTS 5020 } else { 5021 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5022#endif 5023 } 5024 } 5025 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5026 if (chk->data) { 5027 if (so) { 5028 /* Still a socket? */ 5029 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5030 0, chk, SCTP_SO_LOCKED); 5031 } 5032 if (chk->data) { 5033 sctp_m_freem(chk->data); 5034 chk->data = NULL; 5035 } 5036 } 5037 if (chk->holds_key_ref) 5038 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5039 sctp_free_remote_addr(chk->whoTo); 5040 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5041 SCTP_DECR_CHK_COUNT(); 5042 /* sa_ignore FREED_MEMORY */ 5043 } 5044#ifdef INVARIANTS 5045 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5046 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5047 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5048 } 5049 } 5050#endif 5051 /* control queue MAY not be empty */ 5052 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5053 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5054 if (chk->data) { 5055 sctp_m_freem(chk->data); 5056 chk->data = NULL; 5057 } 5058 if (chk->holds_key_ref) 5059 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5060 sctp_free_remote_addr(chk->whoTo); 5061 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5062 SCTP_DECR_CHK_COUNT(); 5063 /* sa_ignore FREED_MEMORY */ 5064 } 5065 /* ASCONF queue MAY not be empty */ 5066 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5067 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5068 if (chk->data) { 5069 sctp_m_freem(chk->data); 5070 chk->data = NULL; 5071 } 5072 if (chk->holds_key_ref) 5073 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5074 sctp_free_remote_addr(chk->whoTo); 5075 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5076 SCTP_DECR_CHK_COUNT(); 5077 /* sa_ignore FREED_MEMORY */ 5078 } 5079 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5080 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5081 if (chk->data) { 5082 sctp_m_freem(chk->data); 5083 chk->data = NULL; 5084 } 5085 if (chk->holds_key_ref) 5086 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5087 sctp_free_remote_addr(chk->whoTo); 5088 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5089 SCTP_DECR_CHK_COUNT(); 5090 /* sa_ignore FREED_MEMORY */ 5091 } 5092 5093 if (asoc->mapping_array) { 5094 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5095 asoc->mapping_array = NULL; 5096 } 5097 if (asoc->nr_mapping_array) { 5098 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5099 asoc->nr_mapping_array = NULL; 5100 } 5101 /* the stream outs */ 5102 if (asoc->strmout) { 5103 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5104 asoc->strmout = NULL; 5105 } 5106 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5107 if (asoc->strmin) { 5108 struct sctp_queued_to_read *ctl, *nctl; 5109 5110 for (i = 0; i < asoc->streamincnt; i++) { 5111 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5112 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5113 sctp_free_remote_addr(ctl->whoFrom); 5114 if (ctl->data) { 5115 sctp_m_freem(ctl->data); 5116 ctl->data = NULL; 5117 } 5118 /* 5119 * We don't free the address here since all 5120 * the net's were freed above. 5121 */ 5122 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5123 SCTP_DECR_READQ_COUNT(); 5124 } 5125 } 5126 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5127 asoc->strmin = NULL; 5128 } 5129 asoc->streamincnt = 0; 5130 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5131#ifdef INVARIANTS 5132 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5133 panic("no net's left alloc'ed, or list points to itself"); 5134 } 5135#endif 5136 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5137 sctp_free_remote_addr(net); 5138 } 5139 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5140 /* sa_ignore FREED_MEMORY */ 5141 sctp_remove_laddr(laddr); 5142 } 5143 5144 /* pending asconf (address) parameters */ 5145 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5146 /* sa_ignore FREED_MEMORY */ 5147 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5148 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5149 } 5150 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5151 /* sa_ignore FREED_MEMORY */ 5152 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5153 if (aack->data != NULL) { 5154 sctp_m_freem(aack->data); 5155 } 5156 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5157 } 5158 /* clean up auth stuff */ 5159 if (asoc->local_hmacs) 5160 sctp_free_hmaclist(asoc->local_hmacs); 5161 if (asoc->peer_hmacs) 5162 sctp_free_hmaclist(asoc->peer_hmacs); 5163 5164 if (asoc->local_auth_chunks) 5165 sctp_free_chunklist(asoc->local_auth_chunks); 5166 if (asoc->peer_auth_chunks) 5167 sctp_free_chunklist(asoc->peer_auth_chunks); 5168 5169 sctp_free_authinfo(&asoc->authinfo); 5170 5171 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5172 LIST_REMOVE(shared_key, next); 5173 sctp_free_sharedkey(shared_key); 5174 /* sa_ignore FREED_MEMORY */ 5175 } 5176 5177 /* Insert new items here :> */ 5178 5179 /* Get rid of LOCK */ 5180 SCTP_TCB_UNLOCK(stcb); 5181 SCTP_TCB_LOCK_DESTROY(stcb); 5182 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5183 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5184 SCTP_INP_INFO_WUNLOCK(); 5185 SCTP_INP_RLOCK(inp); 5186 } 5187#ifdef SCTP_TRACK_FREED_ASOCS 5188 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5189 /* now clean up the tasoc itself */ 5190 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5191 SCTP_DECR_ASOC_COUNT(); 5192 } else { 5193 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5194 } 5195#else 5196 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5197 SCTP_DECR_ASOC_COUNT(); 5198#endif 5199 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5200 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5201 /* 5202 * If its NOT the inp_free calling us AND sctp_close 5203 * as been called, we call back... 5204 */ 5205 SCTP_INP_RUNLOCK(inp); 5206 /* 5207 * This will start the kill timer (if we are the 5208 * last one) since we hold an increment yet. But 5209 * this is the only safe way to do this since 5210 * otherwise if the socket closes at the same time 5211 * we are here we might collide in the cleanup. 5212 */ 5213 sctp_inpcb_free(inp, 5214 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5215 SCTP_CALLED_DIRECTLY_NOCMPSET); 5216 SCTP_INP_DECR_REF(inp); 5217 goto out_of; 5218 } else { 5219 /* The socket is still open. */ 5220 SCTP_INP_DECR_REF(inp); 5221 } 5222 } 5223 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5224 SCTP_INP_RUNLOCK(inp); 5225 } 5226out_of: 5227 /* destroyed the asoc */ 5228#ifdef SCTP_LOG_CLOSING 5229 sctp_log_closing(inp, NULL, 11); 5230#endif 5231 return (1); 5232} 5233 5234 5235 5236/* 5237 * determine if a destination is "reachable" based upon the addresses bound 5238 * to the current endpoint (e.g. only v4 or v6 currently bound) 5239 */ 5240/* 5241 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5242 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5243 * types bound as its endpoint 5244 */ 5245int 5246sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5247{ 5248 struct sctp_inpcb *inp; 5249 int answer; 5250 5251 /* 5252 * No locks here, the TCB, in all cases is already locked and an 5253 * assoc is up. There is either a INP lock by the caller applied (in 5254 * asconf case when deleting an address) or NOT in the HB case, 5255 * however if HB then the INP increment is up and the INP will not 5256 * be removed (on top of the fact that we have a TCB lock). So we 5257 * only want to read the sctp_flags, which is either bound-all or 5258 * not.. no protection needed since once an assoc is up you can't be 5259 * changing your binding. 5260 */ 5261 inp = stcb->sctp_ep; 5262 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5263 /* if bound all, destination is not restricted */ 5264 /* 5265 * RRS: Question during lock work: Is this correct? If you 5266 * are bound-all you still might need to obey the V4--V6 5267 * flags??? IMO this bound-all stuff needs to be removed! 5268 */ 5269 return (1); 5270 } 5271 /* NOTE: all "scope" checks are done when local addresses are added */ 5272 switch (destaddr->sa_family) { 5273#ifdef INET6 5274 case AF_INET6: 5275 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5276 break; 5277#endif 5278#ifdef INET 5279 case AF_INET: 5280 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5281 break; 5282#endif 5283 default: 5284 /* invalid family, so it's unreachable */ 5285 answer = 0; 5286 break; 5287 } 5288 return (answer); 5289} 5290 5291/* 5292 * update the inp_vflags on an endpoint 5293 */ 5294static void 5295sctp_update_ep_vflag(struct sctp_inpcb *inp) 5296{ 5297 struct sctp_laddr *laddr; 5298 5299 /* first clear the flag */ 5300 inp->ip_inp.inp.inp_vflag = 0; 5301 /* set the flag based on addresses on the ep list */ 5302 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5303 if (laddr->ifa == NULL) { 5304 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5305 __FUNCTION__); 5306 continue; 5307 } 5308 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5309 continue; 5310 } 5311 switch (laddr->ifa->address.sa.sa_family) { 5312#ifdef INET6 5313 case AF_INET6: 5314 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5315 break; 5316#endif 5317#ifdef INET 5318 case AF_INET: 5319 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5320 break; 5321#endif 5322 default: 5323 break; 5324 } 5325 } 5326} 5327 5328/* 5329 * Add the address to the endpoint local address list There is nothing to be 5330 * done if we are bound to all addresses 5331 */ 5332void 5333sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5334{ 5335 struct sctp_laddr *laddr; 5336 int fnd, error = 0; 5337 5338 fnd = 0; 5339 5340 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5341 /* You are already bound to all. You have it already */ 5342 return; 5343 } 5344#ifdef INET6 5345 if (ifa->address.sa.sa_family == AF_INET6) { 5346 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5347 /* Can't bind a non-useable addr. */ 5348 return; 5349 } 5350 } 5351#endif 5352 /* first, is it already present? */ 5353 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5354 if (laddr->ifa == ifa) { 5355 fnd = 1; 5356 break; 5357 } 5358 } 5359 5360 if (fnd == 0) { 5361 /* Not in the ep list */ 5362 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5363 if (error != 0) 5364 return; 5365 inp->laddr_count++; 5366 /* update inp_vflag flags */ 5367 switch (ifa->address.sa.sa_family) { 5368#ifdef INET6 5369 case AF_INET6: 5370 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5371 break; 5372#endif 5373#ifdef INET 5374 case AF_INET: 5375 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5376 break; 5377#endif 5378 default: 5379 break; 5380 } 5381 } 5382 return; 5383} 5384 5385 5386/* 5387 * select a new (hopefully reachable) destination net (should only be used 5388 * when we deleted an ep addr that is the only usable source address to reach 5389 * the destination net) 5390 */ 5391static void 5392sctp_select_primary_destination(struct sctp_tcb *stcb) 5393{ 5394 struct sctp_nets *net; 5395 5396 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5397 /* for now, we'll just pick the first reachable one we find */ 5398 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5399 continue; 5400 if (sctp_destination_is_reachable(stcb, 5401 (struct sockaddr *)&net->ro._l_addr)) { 5402 /* found a reachable destination */ 5403 stcb->asoc.primary_destination = net; 5404 } 5405 } 5406 /* I can't there from here! ...we're gonna die shortly... */ 5407} 5408 5409 5410/* 5411 * Delete the address from the endpoint local address list There is nothing 5412 * to be done if we are bound to all addresses 5413 */ 5414void 5415sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5416{ 5417 struct sctp_laddr *laddr; 5418 int fnd; 5419 5420 fnd = 0; 5421 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5422 /* You are already bound to all. You have it already */ 5423 return; 5424 } 5425 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5426 if (laddr->ifa == ifa) { 5427 fnd = 1; 5428 break; 5429 } 5430 } 5431 if (fnd && (inp->laddr_count < 2)) { 5432 /* can't delete unless there are at LEAST 2 addresses */ 5433 return; 5434 } 5435 if (fnd) { 5436 /* 5437 * clean up any use of this address go through our 5438 * associations and clear any last_used_address that match 5439 * this one for each assoc, see if a new primary_destination 5440 * is needed 5441 */ 5442 struct sctp_tcb *stcb; 5443 5444 /* clean up "next_addr_touse" */ 5445 if (inp->next_addr_touse == laddr) 5446 /* delete this address */ 5447 inp->next_addr_touse = NULL; 5448 5449 /* clean up "last_used_address" */ 5450 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5451 struct sctp_nets *net; 5452 5453 SCTP_TCB_LOCK(stcb); 5454 if (stcb->asoc.last_used_address == laddr) 5455 /* delete this address */ 5456 stcb->asoc.last_used_address = NULL; 5457 /* 5458 * Now spin through all the nets and purge any ref 5459 * to laddr 5460 */ 5461 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5462 if (net->ro._s_addr && 5463 (net->ro._s_addr->ifa == laddr->ifa)) { 5464 /* Yep, purge src address selected */ 5465 sctp_rtentry_t *rt; 5466 5467 /* delete this address if cached */ 5468 rt = net->ro.ro_rt; 5469 if (rt != NULL) { 5470 RTFREE(rt); 5471 net->ro.ro_rt = NULL; 5472 } 5473 sctp_free_ifa(net->ro._s_addr); 5474 net->ro._s_addr = NULL; 5475 net->src_addr_selected = 0; 5476 } 5477 } 5478 SCTP_TCB_UNLOCK(stcb); 5479 } /* for each tcb */ 5480 /* remove it from the ep list */ 5481 sctp_remove_laddr(laddr); 5482 inp->laddr_count--; 5483 /* update inp_vflag flags */ 5484 sctp_update_ep_vflag(inp); 5485 } 5486 return; 5487} 5488 5489/* 5490 * Add the address to the TCB local address restricted list. 5491 * This is a "pending" address list (eg. addresses waiting for an 5492 * ASCONF-ACK response) and cannot be used as a valid source address. 5493 */ 5494void 5495sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5496{ 5497 struct sctp_laddr *laddr; 5498 struct sctpladdr *list; 5499 5500 /* 5501 * Assumes TCB is locked.. and possibly the INP. May need to 5502 * confirm/fix that if we need it and is not the case. 5503 */ 5504 list = &stcb->asoc.sctp_restricted_addrs; 5505 5506#ifdef INET6 5507 if (ifa->address.sa.sa_family == AF_INET6) { 5508 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5509 /* Can't bind a non-existent addr. */ 5510 return; 5511 } 5512 } 5513#endif 5514 /* does the address already exist? */ 5515 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5516 if (laddr->ifa == ifa) { 5517 return; 5518 } 5519 } 5520 5521 /* add to the list */ 5522 (void)sctp_insert_laddr(list, ifa, 0); 5523 return; 5524} 5525 5526/* 5527 * insert an laddr entry with the given ifa for the desired list 5528 */ 5529int 5530sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5531{ 5532 struct sctp_laddr *laddr; 5533 5534 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5535 if (laddr == NULL) { 5536 /* out of memory? */ 5537 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5538 return (EINVAL); 5539 } 5540 SCTP_INCR_LADDR_COUNT(); 5541 bzero(laddr, sizeof(*laddr)); 5542 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5543 laddr->ifa = ifa; 5544 laddr->action = act; 5545 atomic_add_int(&ifa->refcount, 1); 5546 /* insert it */ 5547 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5548 5549 return (0); 5550} 5551 5552/* 5553 * Remove an laddr entry from the local address list (on an assoc) 5554 */ 5555void 5556sctp_remove_laddr(struct sctp_laddr *laddr) 5557{ 5558 5559 /* remove from the list */ 5560 LIST_REMOVE(laddr, sctp_nxt_addr); 5561 sctp_free_ifa(laddr->ifa); 5562 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5563 SCTP_DECR_LADDR_COUNT(); 5564} 5565 5566/* 5567 * Remove a local address from the TCB local address restricted list 5568 */ 5569void 5570sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5571{ 5572 struct sctp_inpcb *inp; 5573 struct sctp_laddr *laddr; 5574 5575 /* 5576 * This is called by asconf work. It is assumed that a) The TCB is 5577 * locked and b) The INP is locked. This is true in as much as I can 5578 * trace through the entry asconf code where I did these locks. 5579 * Again, the ASCONF code is a bit different in that it does lock 5580 * the INP during its work often times. This must be since we don't 5581 * want other proc's looking up things while what they are looking 5582 * up is changing :-D 5583 */ 5584 5585 inp = stcb->sctp_ep; 5586 /* if subset bound and don't allow ASCONF's, can't delete last */ 5587 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5588 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5589 if (stcb->sctp_ep->laddr_count < 2) { 5590 /* can't delete last address */ 5591 return; 5592 } 5593 } 5594 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5595 /* remove the address if it exists */ 5596 if (laddr->ifa == NULL) 5597 continue; 5598 if (laddr->ifa == ifa) { 5599 sctp_remove_laddr(laddr); 5600 return; 5601 } 5602 } 5603 5604 /* address not found! */ 5605 return; 5606} 5607 5608/* 5609 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5610 */ 5611/* sysctl */ 5612static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5613static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5614 5615 5616 5617#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5618struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5619int *sctp_cpuarry = NULL; 5620void 5621sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5622{ 5623 /* Queue a packet to a processor for the specified core */ 5624 struct sctp_mcore_queue *qent; 5625 struct sctp_mcore_ctrl *wkq; 5626 int need_wake = 0; 5627 5628 if (sctp_mcore_workers == NULL) { 5629 /* Something went way bad during setup */ 5630 sctp_input_with_port(m, off, 0); 5631 return; 5632 } 5633 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5634 (sizeof(struct sctp_mcore_queue)), 5635 SCTP_M_MCORE); 5636 if (qent == NULL) { 5637 /* This is trouble */ 5638 sctp_input_with_port(m, off, 0); 5639 return; 5640 } 5641 qent->vn = curvnet; 5642 qent->m = m; 5643 qent->off = off; 5644 qent->v6 = 0; 5645 wkq = &sctp_mcore_workers[cpu_to_use]; 5646 SCTP_MCORE_QLOCK(wkq); 5647 5648 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5649 if (wkq->running == 0) { 5650 need_wake = 1; 5651 } 5652 SCTP_MCORE_QUNLOCK(wkq); 5653 if (need_wake) { 5654 wakeup(&wkq->running); 5655 } 5656} 5657 5658static void 5659sctp_mcore_thread(void *arg) 5660{ 5661 5662 struct sctp_mcore_ctrl *wkq; 5663 struct sctp_mcore_queue *qent; 5664 5665 wkq = (struct sctp_mcore_ctrl *)arg; 5666 struct mbuf *m; 5667 int off, v6; 5668 5669 /* Wait for first tickle */ 5670 SCTP_MCORE_LOCK(wkq); 5671 wkq->running = 0; 5672 msleep(&wkq->running, 5673 &wkq->core_mtx, 5674 0, "wait for pkt", 0); 5675 SCTP_MCORE_UNLOCK(wkq); 5676 5677 /* Bind to our cpu */ 5678 thread_lock(curthread); 5679 sched_bind(curthread, wkq->cpuid); 5680 thread_unlock(curthread); 5681 5682 /* Now lets start working */ 5683 SCTP_MCORE_LOCK(wkq); 5684 /* Now grab lock and go */ 5685 for (;;) { 5686 SCTP_MCORE_QLOCK(wkq); 5687skip_sleep: 5688 wkq->running = 1; 5689 qent = TAILQ_FIRST(&wkq->que); 5690 if (qent) { 5691 TAILQ_REMOVE(&wkq->que, qent, next); 5692 SCTP_MCORE_QUNLOCK(wkq); 5693 CURVNET_SET(qent->vn); 5694 m = qent->m; 5695 off = qent->off; 5696 v6 = qent->v6; 5697 SCTP_FREE(qent, SCTP_M_MCORE); 5698 if (v6 == 0) { 5699 sctp_input_with_port(m, off, 0); 5700 } else { 5701 SCTP_PRINTF("V6 not yet supported\n"); 5702 sctp_m_freem(m); 5703 } 5704 CURVNET_RESTORE(); 5705 SCTP_MCORE_QLOCK(wkq); 5706 } 5707 wkq->running = 0; 5708 if (!TAILQ_EMPTY(&wkq->que)) { 5709 goto skip_sleep; 5710 } 5711 SCTP_MCORE_QUNLOCK(wkq); 5712 msleep(&wkq->running, 5713 &wkq->core_mtx, 5714 0, "wait for pkt", 0); 5715 } 5716} 5717 5718static void 5719sctp_startup_mcore_threads(void) 5720{ 5721 int i, cpu; 5722 5723 if (mp_ncpus == 1) 5724 return; 5725 5726 if (sctp_mcore_workers != NULL) { 5727 /* 5728 * Already been here in some previous vnet? 5729 */ 5730 return; 5731 } 5732 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5733 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5734 SCTP_M_MCORE); 5735 if (sctp_mcore_workers == NULL) { 5736 /* TSNH I hope */ 5737 return; 5738 } 5739 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5740 sizeof(struct sctp_mcore_ctrl))); 5741 /* Init the structures */ 5742 for (i = 0; i <= mp_maxid; i++) { 5743 TAILQ_INIT(&sctp_mcore_workers[i].que); 5744 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5745 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5746 sctp_mcore_workers[i].cpuid = i; 5747 } 5748 if (sctp_cpuarry == NULL) { 5749 SCTP_MALLOC(sctp_cpuarry, int *, 5750 (mp_ncpus * sizeof(int)), 5751 SCTP_M_MCORE); 5752 i = 0; 5753 CPU_FOREACH(cpu) { 5754 sctp_cpuarry[i] = cpu; 5755 i++; 5756 } 5757 } 5758 /* Now start them all */ 5759 CPU_FOREACH(cpu) { 5760 (void)kproc_create(sctp_mcore_thread, 5761 (void *)&sctp_mcore_workers[cpu], 5762 &sctp_mcore_workers[cpu].thread_proc, 5763 RFPROC, 5764 SCTP_KTHREAD_PAGES, 5765 SCTP_MCORE_NAME); 5766 5767 } 5768} 5769 5770#endif 5771 5772void 5773sctp_pcb_init() 5774{ 5775 /* 5776 * SCTP initialization for the PCB structures should be called by 5777 * the sctp_init() funciton. 5778 */ 5779 int i; 5780 struct timeval tv; 5781 5782 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5783 /* error I was called twice */ 5784 return; 5785 } 5786 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5787 5788#if defined(SCTP_LOCAL_TRACE_BUF) 5789 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5790#endif 5791#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5792 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5793 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5794 SCTP_M_MCORE); 5795#endif 5796 (void)SCTP_GETTIME_TIMEVAL(&tv); 5797#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5798 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5799 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5800 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5801#else 5802 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5803 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5804 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5805#endif 5806 /* init the empty list of (All) Endpoints */ 5807 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5808 5809 5810 /* init the hash table of endpoints */ 5811 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5812 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5813 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5814 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5815 &SCTP_BASE_INFO(hashasocmark)); 5816 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5817 &SCTP_BASE_INFO(hashmark)); 5818 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5819 &SCTP_BASE_INFO(hashtcpmark)); 5820 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5821 5822 5823 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5824 &SCTP_BASE_INFO(hashvrfmark)); 5825 5826 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5827 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5828 /* init the zones */ 5829 /* 5830 * FIX ME: Should check for NULL returns, but if it does fail we are 5831 * doomed to panic anyways... add later maybe. 5832 */ 5833 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5834 sizeof(struct sctp_inpcb), maxsockets); 5835 5836 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5837 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5838 5839 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5840 sizeof(struct sctp_laddr), 5841 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5842 5843 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5844 sizeof(struct sctp_nets), 5845 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5846 5847 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5848 sizeof(struct sctp_tmit_chunk), 5849 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5850 5851 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5852 sizeof(struct sctp_queued_to_read), 5853 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5854 5855 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5856 sizeof(struct sctp_stream_queue_pending), 5857 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5858 5859 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5860 sizeof(struct sctp_asconf), 5861 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5862 5863 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5864 sizeof(struct sctp_asconf_ack), 5865 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5866 5867 5868 /* Master Lock INIT for info structure */ 5869 SCTP_INP_INFO_LOCK_INIT(); 5870 SCTP_STATLOG_INIT_LOCK(); 5871 5872 SCTP_IPI_COUNT_INIT(); 5873 SCTP_IPI_ADDR_INIT(); 5874#ifdef SCTP_PACKET_LOGGING 5875 SCTP_IP_PKTLOG_INIT(); 5876#endif 5877 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5878 5879 SCTP_WQ_ADDR_INIT(); 5880 /* not sure if we need all the counts */ 5881 SCTP_BASE_INFO(ipi_count_ep) = 0; 5882 /* assoc/tcb zone info */ 5883 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5884 /* local addrlist zone info */ 5885 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5886 /* remote addrlist zone info */ 5887 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5888 /* chunk info */ 5889 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5890 5891 /* socket queue zone info */ 5892 SCTP_BASE_INFO(ipi_count_readq) = 0; 5893 5894 /* stream out queue cont */ 5895 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5896 5897 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5898 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5899 5900 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5901 5902 /* Init the TIMEWAIT list */ 5903 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5904 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5905 } 5906 sctp_startup_iterator(); 5907 5908#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5909 sctp_startup_mcore_threads(); 5910#endif 5911 5912 /* 5913 * INIT the default VRF which for BSD is the only one, other O/S's 5914 * may have more. But initially they must start with one and then 5915 * add the VRF's as addresses are added. 5916 */ 5917 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5918} 5919 5920/* 5921 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5922 */ 5923void 5924sctp_pcb_finish(void) 5925{ 5926 struct sctp_vrflist *vrf_bucket; 5927 struct sctp_vrf *vrf, *nvrf; 5928 struct sctp_ifn *ifn, *nifn; 5929 struct sctp_ifa *ifa, *nifa; 5930 struct sctpvtaghead *chain; 5931 struct sctp_tagblock *twait_block, *prev_twait_block; 5932 struct sctp_laddr *wi, *nwi; 5933 int i; 5934 struct sctp_iterator *it, *nit; 5935 5936 /* 5937 * In FreeBSD the iterator thread never exits but we do clean up. 5938 * The only way FreeBSD reaches here is if we have VRF's but we 5939 * still add the ifdef to make it compile on old versions. 5940 */ 5941 SCTP_IPI_ITERATOR_WQ_LOCK(); 5942 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5943 if (it->vn != curvnet) { 5944 continue; 5945 } 5946 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5947 if (it->function_atend != NULL) { 5948 (*it->function_atend) (it->pointer, it->val); 5949 } 5950 SCTP_FREE(it, SCTP_M_ITER); 5951 } 5952 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5953 SCTP_ITERATOR_LOCK(); 5954 if ((sctp_it_ctl.cur_it) && 5955 (sctp_it_ctl.cur_it->vn == curvnet)) { 5956 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5957 } 5958 SCTP_ITERATOR_UNLOCK(); 5959 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5960 SCTP_WQ_ADDR_LOCK(); 5961 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5962 LIST_REMOVE(wi, sctp_nxt_addr); 5963 SCTP_DECR_LADDR_COUNT(); 5964 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5965 } 5966 SCTP_WQ_ADDR_UNLOCK(); 5967 5968 /* 5969 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5970 * destroyed first). 5971 */ 5972 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5973 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5974 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5975 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5976 /* free the ifa */ 5977 LIST_REMOVE(ifa, next_bucket); 5978 LIST_REMOVE(ifa, next_ifa); 5979 SCTP_FREE(ifa, SCTP_M_IFA); 5980 } 5981 /* free the ifn */ 5982 LIST_REMOVE(ifn, next_bucket); 5983 LIST_REMOVE(ifn, next_ifn); 5984 SCTP_FREE(ifn, SCTP_M_IFN); 5985 } 5986 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5987 /* free the vrf */ 5988 LIST_REMOVE(vrf, next_vrf); 5989 SCTP_FREE(vrf, SCTP_M_VRF); 5990 } 5991 /* free the vrf hashes */ 5992 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5993 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5994 5995 /* 5996 * free the TIMEWAIT list elements malloc'd in the function 5997 * sctp_add_vtag_to_timewait()... 5998 */ 5999 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6000 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6001 if (!LIST_EMPTY(chain)) { 6002 prev_twait_block = NULL; 6003 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6004 if (prev_twait_block) { 6005 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6006 } 6007 prev_twait_block = twait_block; 6008 } 6009 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6010 } 6011 } 6012 6013 /* free the locks and mutexes */ 6014#ifdef SCTP_PACKET_LOGGING 6015 SCTP_IP_PKTLOG_DESTROY(); 6016#endif 6017 SCTP_IPI_ADDR_DESTROY(); 6018 SCTP_STATLOG_DESTROY(); 6019 SCTP_INP_INFO_LOCK_DESTROY(); 6020 6021 SCTP_WQ_ADDR_DESTROY(); 6022 6023 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6024 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6025 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6026 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6027 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6028 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6029 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6030 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6031 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6032 /* Get rid of other stuff to */ 6033 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6034 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6035 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6036 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6037 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6038 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6039#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6040 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6041#endif 6042} 6043 6044 6045int 6046sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6047 int offset, int limit, 6048 struct sockaddr *src, struct sockaddr *dst, 6049 struct sockaddr *altsa) 6050{ 6051 /* 6052 * grub through the INIT pulling addresses and loading them to the 6053 * nets structure in the asoc. The from address in the mbuf should 6054 * also be loaded (if it is not already). This routine can be called 6055 * with either INIT or INIT-ACK's as long as the m points to the IP 6056 * packet and the offset points to the beginning of the parameters. 6057 */ 6058 struct sctp_inpcb *inp; 6059 struct sctp_nets *net, *nnet, *net_tmp; 6060 struct sctp_paramhdr *phdr, parm_buf; 6061 struct sctp_tcb *stcb_tmp; 6062 uint16_t ptype, plen; 6063 struct sockaddr *sa; 6064 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6065 struct sctp_auth_random *p_random = NULL; 6066 uint16_t random_len = 0; 6067 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6068 struct sctp_auth_hmac_algo *hmacs = NULL; 6069 uint16_t hmacs_len = 0; 6070 uint8_t saw_asconf = 0; 6071 uint8_t saw_asconf_ack = 0; 6072 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6073 struct sctp_auth_chunk_list *chunks = NULL; 6074 uint16_t num_chunks = 0; 6075 sctp_key_t *new_key; 6076 uint32_t keylen; 6077 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6078 uint8_t ecn_allowed; 6079 6080#ifdef INET 6081 struct sockaddr_in sin; 6082 6083#endif 6084#ifdef INET6 6085 struct sockaddr_in6 sin6; 6086 6087#endif 6088 6089 /* First get the destination address setup too. */ 6090#ifdef INET 6091 memset(&sin, 0, sizeof(sin)); 6092 sin.sin_family = AF_INET; 6093 sin.sin_len = sizeof(sin); 6094 sin.sin_port = stcb->rport; 6095#endif 6096#ifdef INET6 6097 memset(&sin6, 0, sizeof(sin6)); 6098 sin6.sin6_family = AF_INET6; 6099 sin6.sin6_len = sizeof(struct sockaddr_in6); 6100 sin6.sin6_port = stcb->rport; 6101#endif 6102 if (altsa) { 6103 sa = altsa; 6104 } else { 6105 sa = src; 6106 } 6107 /* Turn off ECN until we get through all params */ 6108 ecn_allowed = 0; 6109 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6110 /* mark all addresses that we have currently on the list */ 6111 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6112 } 6113 /* does the source address already exist? if so skip it */ 6114 inp = stcb->sctp_ep; 6115 atomic_add_int(&stcb->asoc.refcnt, 1); 6116 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6117 atomic_add_int(&stcb->asoc.refcnt, -1); 6118 6119 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6120 /* we must add the source address */ 6121 /* no scope set here since we have a tcb already. */ 6122 switch (sa->sa_family) { 6123#ifdef INET 6124 case AF_INET: 6125 if (stcb->asoc.scope.ipv4_addr_legal) { 6126 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6127 return (-1); 6128 } 6129 } 6130 break; 6131#endif 6132#ifdef INET6 6133 case AF_INET6: 6134 if (stcb->asoc.scope.ipv6_addr_legal) { 6135 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6136 return (-2); 6137 } 6138 } 6139 break; 6140#endif 6141 default: 6142 break; 6143 } 6144 } else { 6145 if (net_tmp != NULL && stcb_tmp == stcb) { 6146 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6147 } else if (stcb_tmp != stcb) { 6148 /* It belongs to another association? */ 6149 if (stcb_tmp) 6150 SCTP_TCB_UNLOCK(stcb_tmp); 6151 return (-3); 6152 } 6153 } 6154 if (stcb->asoc.state == 0) { 6155 /* the assoc was freed? */ 6156 return (-4); 6157 } 6158 /* 6159 * peer must explicitly turn this on. This may have been initialized 6160 * to be "on" in order to allow local addr changes while INIT's are 6161 * in flight. 6162 */ 6163 stcb->asoc.peer_supports_asconf = 0; 6164 /* now we must go through each of the params. */ 6165 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6166 while (phdr) { 6167 ptype = ntohs(phdr->param_type); 6168 plen = ntohs(phdr->param_length); 6169 /* 6170 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6171 * (uint32_t)ptype, (int)plen); 6172 */ 6173 if (offset + plen > limit) { 6174 break; 6175 } 6176 if (plen == 0) { 6177 break; 6178 } 6179#ifdef INET 6180 if (ptype == SCTP_IPV4_ADDRESS) { 6181 if (stcb->asoc.scope.ipv4_addr_legal) { 6182 struct sctp_ipv4addr_param *p4, p4_buf; 6183 6184 /* ok get the v4 address and check/add */ 6185 phdr = sctp_get_next_param(m, offset, 6186 (struct sctp_paramhdr *)&p4_buf, 6187 sizeof(p4_buf)); 6188 if (plen != sizeof(struct sctp_ipv4addr_param) || 6189 phdr == NULL) { 6190 return (-5); 6191 } 6192 p4 = (struct sctp_ipv4addr_param *)phdr; 6193 sin.sin_addr.s_addr = p4->addr; 6194 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6195 /* Skip multi-cast addresses */ 6196 goto next_param; 6197 } 6198 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6199 (sin.sin_addr.s_addr == INADDR_ANY)) { 6200 goto next_param; 6201 } 6202 sa = (struct sockaddr *)&sin; 6203 inp = stcb->sctp_ep; 6204 atomic_add_int(&stcb->asoc.refcnt, 1); 6205 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6206 dst, stcb); 6207 atomic_add_int(&stcb->asoc.refcnt, -1); 6208 6209 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6210 inp == NULL) { 6211 /* we must add the source address */ 6212 /* 6213 * no scope set since we have a tcb 6214 * already 6215 */ 6216 6217 /* 6218 * we must validate the state again 6219 * here 6220 */ 6221 add_it_now: 6222 if (stcb->asoc.state == 0) { 6223 /* the assoc was freed? */ 6224 return (-7); 6225 } 6226 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6227 return (-8); 6228 } 6229 } else if (stcb_tmp == stcb) { 6230 if (stcb->asoc.state == 0) { 6231 /* the assoc was freed? */ 6232 return (-10); 6233 } 6234 if (net != NULL) { 6235 /* clear flag */ 6236 net->dest_state &= 6237 ~SCTP_ADDR_NOT_IN_ASSOC; 6238 } 6239 } else { 6240 /* 6241 * strange, address is in another 6242 * assoc? straighten out locks. 6243 */ 6244 if (stcb_tmp) { 6245 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6246 /* 6247 * in setup state we 6248 * abort this guy 6249 */ 6250 sctp_abort_an_association(stcb_tmp->sctp_ep, 6251 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6252 goto add_it_now; 6253 } 6254 SCTP_TCB_UNLOCK(stcb_tmp); 6255 } 6256 if (stcb->asoc.state == 0) { 6257 /* the assoc was freed? */ 6258 return (-12); 6259 } 6260 return (-13); 6261 } 6262 } 6263 } else 6264#endif 6265#ifdef INET6 6266 if (ptype == SCTP_IPV6_ADDRESS) { 6267 if (stcb->asoc.scope.ipv6_addr_legal) { 6268 /* ok get the v6 address and check/add */ 6269 struct sctp_ipv6addr_param *p6, p6_buf; 6270 6271 phdr = sctp_get_next_param(m, offset, 6272 (struct sctp_paramhdr *)&p6_buf, 6273 sizeof(p6_buf)); 6274 if (plen != sizeof(struct sctp_ipv6addr_param) || 6275 phdr == NULL) { 6276 return (-14); 6277 } 6278 p6 = (struct sctp_ipv6addr_param *)phdr; 6279 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6280 sizeof(p6->addr)); 6281 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6282 /* Skip multi-cast addresses */ 6283 goto next_param; 6284 } 6285 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6286 /* 6287 * Link local make no sense without 6288 * scope 6289 */ 6290 goto next_param; 6291 } 6292 sa = (struct sockaddr *)&sin6; 6293 inp = stcb->sctp_ep; 6294 atomic_add_int(&stcb->asoc.refcnt, 1); 6295 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6296 dst, stcb); 6297 atomic_add_int(&stcb->asoc.refcnt, -1); 6298 if (stcb_tmp == NULL && 6299 (inp == stcb->sctp_ep || inp == NULL)) { 6300 /* 6301 * we must validate the state again 6302 * here 6303 */ 6304 add_it_now6: 6305 if (stcb->asoc.state == 0) { 6306 /* the assoc was freed? */ 6307 return (-16); 6308 } 6309 /* 6310 * we must add the address, no scope 6311 * set 6312 */ 6313 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6314 return (-17); 6315 } 6316 } else if (stcb_tmp == stcb) { 6317 /* 6318 * we must validate the state again 6319 * here 6320 */ 6321 if (stcb->asoc.state == 0) { 6322 /* the assoc was freed? */ 6323 return (-19); 6324 } 6325 if (net != NULL) { 6326 /* clear flag */ 6327 net->dest_state &= 6328 ~SCTP_ADDR_NOT_IN_ASSOC; 6329 } 6330 } else { 6331 /* 6332 * strange, address is in another 6333 * assoc? straighten out locks. 6334 */ 6335 if (stcb_tmp) 6336 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6337 /* 6338 * in setup state we 6339 * abort this guy 6340 */ 6341 sctp_abort_an_association(stcb_tmp->sctp_ep, 6342 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6343 goto add_it_now6; 6344 } 6345 SCTP_TCB_UNLOCK(stcb_tmp); 6346 6347 if (stcb->asoc.state == 0) { 6348 /* the assoc was freed? */ 6349 return (-21); 6350 } 6351 return (-22); 6352 } 6353 } 6354 } else 6355#endif 6356 if (ptype == SCTP_ECN_CAPABLE) { 6357 ecn_allowed = 1; 6358 } else if (ptype == SCTP_ULP_ADAPTATION) { 6359 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6360 struct sctp_adaptation_layer_indication ai, 6361 *aip; 6362 6363 phdr = sctp_get_next_param(m, offset, 6364 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6365 aip = (struct sctp_adaptation_layer_indication *)phdr; 6366 if (aip) { 6367 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6368 stcb->asoc.adaptation_needed = 1; 6369 } 6370 } 6371 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6372 struct sctp_asconf_addr_param lstore, *fee; 6373 int lptype; 6374 struct sockaddr *lsa = NULL; 6375 6376#ifdef INET 6377 struct sctp_asconf_addrv4_param *fii; 6378 6379#endif 6380 6381 stcb->asoc.peer_supports_asconf = 1; 6382 if (plen > sizeof(lstore)) { 6383 return (-23); 6384 } 6385 phdr = sctp_get_next_param(m, offset, 6386 (struct sctp_paramhdr *)&lstore, 6387 min(plen, sizeof(lstore))); 6388 if (phdr == NULL) { 6389 return (-24); 6390 } 6391 fee = (struct sctp_asconf_addr_param *)phdr; 6392 lptype = ntohs(fee->addrp.ph.param_type); 6393 switch (lptype) { 6394#ifdef INET 6395 case SCTP_IPV4_ADDRESS: 6396 if (plen != 6397 sizeof(struct sctp_asconf_addrv4_param)) { 6398 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6399 (int)sizeof(struct sctp_asconf_addrv4_param), 6400 plen); 6401 } else { 6402 fii = (struct sctp_asconf_addrv4_param *)fee; 6403 sin.sin_addr.s_addr = fii->addrp.addr; 6404 lsa = (struct sockaddr *)&sin; 6405 } 6406 break; 6407#endif 6408#ifdef INET6 6409 case SCTP_IPV6_ADDRESS: 6410 if (plen != 6411 sizeof(struct sctp_asconf_addr_param)) { 6412 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6413 (int)sizeof(struct sctp_asconf_addr_param), 6414 plen); 6415 } else { 6416 memcpy(sin6.sin6_addr.s6_addr, 6417 fee->addrp.addr, 6418 sizeof(fee->addrp.addr)); 6419 lsa = (struct sockaddr *)&sin6; 6420 } 6421 break; 6422#endif 6423 default: 6424 break; 6425 } 6426 if (lsa) { 6427 (void)sctp_set_primary_addr(stcb, sa, NULL); 6428 } 6429 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6430 stcb->asoc.peer_supports_nat = 1; 6431 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6432 /* Peer supports pr-sctp */ 6433 stcb->asoc.peer_supports_prsctp = 1; 6434 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6435 /* A supported extension chunk */ 6436 struct sctp_supported_chunk_types_param *pr_supported; 6437 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6438 int num_ent, i; 6439 6440 phdr = sctp_get_next_param(m, offset, 6441 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6442 if (phdr == NULL) { 6443 return (-25); 6444 } 6445 stcb->asoc.peer_supports_asconf = 0; 6446 stcb->asoc.peer_supports_prsctp = 0; 6447 stcb->asoc.peer_supports_pktdrop = 0; 6448 stcb->asoc.peer_supports_strreset = 0; 6449 stcb->asoc.peer_supports_nr_sack = 0; 6450 stcb->asoc.peer_supports_auth = 0; 6451 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6452 num_ent = plen - sizeof(struct sctp_paramhdr); 6453 for (i = 0; i < num_ent; i++) { 6454 switch (pr_supported->chunk_types[i]) { 6455 case SCTP_ASCONF: 6456 case SCTP_ASCONF_ACK: 6457 stcb->asoc.peer_supports_asconf = 1; 6458 break; 6459 case SCTP_FORWARD_CUM_TSN: 6460 stcb->asoc.peer_supports_prsctp = 1; 6461 break; 6462 case SCTP_PACKET_DROPPED: 6463 stcb->asoc.peer_supports_pktdrop = 1; 6464 break; 6465 case SCTP_NR_SELECTIVE_ACK: 6466 stcb->asoc.peer_supports_nr_sack = 1; 6467 break; 6468 case SCTP_STREAM_RESET: 6469 stcb->asoc.peer_supports_strreset = 1; 6470 break; 6471 case SCTP_AUTHENTICATION: 6472 stcb->asoc.peer_supports_auth = 1; 6473 break; 6474 default: 6475 /* one I have not learned yet */ 6476 break; 6477 6478 } 6479 } 6480 } else if (ptype == SCTP_RANDOM) { 6481 if (plen > sizeof(random_store)) 6482 break; 6483 if (got_random) { 6484 /* already processed a RANDOM */ 6485 goto next_param; 6486 } 6487 phdr = sctp_get_next_param(m, offset, 6488 (struct sctp_paramhdr *)random_store, 6489 min(sizeof(random_store), plen)); 6490 if (phdr == NULL) 6491 return (-26); 6492 p_random = (struct sctp_auth_random *)phdr; 6493 random_len = plen - sizeof(*p_random); 6494 /* enforce the random length */ 6495 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6496 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6497 return (-27); 6498 } 6499 got_random = 1; 6500 } else if (ptype == SCTP_HMAC_LIST) { 6501 int num_hmacs; 6502 int i; 6503 6504 if (plen > sizeof(hmacs_store)) 6505 break; 6506 if (got_hmacs) { 6507 /* already processed a HMAC list */ 6508 goto next_param; 6509 } 6510 phdr = sctp_get_next_param(m, offset, 6511 (struct sctp_paramhdr *)hmacs_store, 6512 min(plen, sizeof(hmacs_store))); 6513 if (phdr == NULL) 6514 return (-28); 6515 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6516 hmacs_len = plen - sizeof(*hmacs); 6517 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6518 /* validate the hmac list */ 6519 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6520 return (-29); 6521 } 6522 if (stcb->asoc.peer_hmacs != NULL) 6523 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6524 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6525 if (stcb->asoc.peer_hmacs != NULL) { 6526 for (i = 0; i < num_hmacs; i++) { 6527 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6528 ntohs(hmacs->hmac_ids[i])); 6529 } 6530 } 6531 got_hmacs = 1; 6532 } else if (ptype == SCTP_CHUNK_LIST) { 6533 int i; 6534 6535 if (plen > sizeof(chunks_store)) 6536 break; 6537 if (got_chklist) { 6538 /* already processed a Chunks list */ 6539 goto next_param; 6540 } 6541 phdr = sctp_get_next_param(m, offset, 6542 (struct sctp_paramhdr *)chunks_store, 6543 min(plen, sizeof(chunks_store))); 6544 if (phdr == NULL) 6545 return (-30); 6546 chunks = (struct sctp_auth_chunk_list *)phdr; 6547 num_chunks = plen - sizeof(*chunks); 6548 if (stcb->asoc.peer_auth_chunks != NULL) 6549 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6550 else 6551 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6552 for (i = 0; i < num_chunks; i++) { 6553 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6554 stcb->asoc.peer_auth_chunks); 6555 /* record asconf/asconf-ack if listed */ 6556 if (chunks->chunk_types[i] == SCTP_ASCONF) 6557 saw_asconf = 1; 6558 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6559 saw_asconf_ack = 1; 6560 6561 } 6562 got_chklist = 1; 6563 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6564 (ptype == SCTP_STATE_COOKIE) || 6565 (ptype == SCTP_UNRECOG_PARAM) || 6566 (ptype == SCTP_COOKIE_PRESERVE) || 6567 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6568 (ptype == SCTP_ADD_IP_ADDRESS) || 6569 (ptype == SCTP_DEL_IP_ADDRESS) || 6570 (ptype == SCTP_ERROR_CAUSE_IND) || 6571 (ptype == SCTP_SUCCESS_REPORT)) { 6572 /* don't care */ ; 6573 } else { 6574 if ((ptype & 0x8000) == 0x0000) { 6575 /* 6576 * must stop processing the rest of the 6577 * param's. Any report bits were handled 6578 * with the call to 6579 * sctp_arethere_unrecognized_parameters() 6580 * when the INIT or INIT-ACK was first seen. 6581 */ 6582 break; 6583 } 6584 } 6585 6586next_param: 6587 offset += SCTP_SIZE32(plen); 6588 if (offset >= limit) { 6589 break; 6590 } 6591 phdr = sctp_get_next_param(m, offset, &parm_buf, 6592 sizeof(parm_buf)); 6593 } 6594 /* Now check to see if we need to purge any addresses */ 6595 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6596 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6597 SCTP_ADDR_NOT_IN_ASSOC) { 6598 /* This address has been removed from the asoc */ 6599 /* remove and free it */ 6600 stcb->asoc.numnets--; 6601 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6602 sctp_free_remote_addr(net); 6603 if (net == stcb->asoc.primary_destination) { 6604 stcb->asoc.primary_destination = NULL; 6605 sctp_select_primary_destination(stcb); 6606 } 6607 } 6608 } 6609 if (ecn_allowed == 0) { 6610 stcb->asoc.ecn_allowed = 0; 6611 } 6612 /* validate authentication required parameters */ 6613 if (got_random && got_hmacs) { 6614 stcb->asoc.peer_supports_auth = 1; 6615 } else { 6616 stcb->asoc.peer_supports_auth = 0; 6617 } 6618 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6619 /* peer does not support auth but sent a chunks list? */ 6620 return (-31); 6621 } 6622 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6623 !stcb->asoc.peer_supports_auth) { 6624 /* peer supports asconf but not auth? */ 6625 return (-32); 6626 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6627 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6628 return (-33); 6629 } 6630 /* concatenate the full random key */ 6631 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6632 if (chunks != NULL) { 6633 keylen += sizeof(*chunks) + num_chunks; 6634 } 6635 new_key = sctp_alloc_key(keylen); 6636 if (new_key != NULL) { 6637 /* copy in the RANDOM */ 6638 if (p_random != NULL) { 6639 keylen = sizeof(*p_random) + random_len; 6640 bcopy(p_random, new_key->key, keylen); 6641 } 6642 /* append in the AUTH chunks */ 6643 if (chunks != NULL) { 6644 bcopy(chunks, new_key->key + keylen, 6645 sizeof(*chunks) + num_chunks); 6646 keylen += sizeof(*chunks) + num_chunks; 6647 } 6648 /* append in the HMACs */ 6649 if (hmacs != NULL) { 6650 bcopy(hmacs, new_key->key + keylen, 6651 sizeof(*hmacs) + hmacs_len); 6652 } 6653 } else { 6654 /* failed to get memory for the key */ 6655 return (-34); 6656 } 6657 if (stcb->asoc.authinfo.peer_random != NULL) 6658 sctp_free_key(stcb->asoc.authinfo.peer_random); 6659 stcb->asoc.authinfo.peer_random = new_key; 6660 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6661 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6662 6663 return (0); 6664} 6665 6666int 6667sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6668 struct sctp_nets *net) 6669{ 6670 /* make sure the requested primary address exists in the assoc */ 6671 if (net == NULL && sa) 6672 net = sctp_findnet(stcb, sa); 6673 6674 if (net == NULL) { 6675 /* didn't find the requested primary address! */ 6676 return (-1); 6677 } else { 6678 /* set the primary address */ 6679 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6680 /* Must be confirmed, so queue to set */ 6681 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6682 return (0); 6683 } 6684 stcb->asoc.primary_destination = net; 6685 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6686 sctp_free_remote_addr(stcb->asoc.alternate); 6687 stcb->asoc.alternate = NULL; 6688 } 6689 net = TAILQ_FIRST(&stcb->asoc.nets); 6690 if (net != stcb->asoc.primary_destination) { 6691 /* 6692 * first one on the list is NOT the primary 6693 * sctp_cmpaddr() is much more efficient if the 6694 * primary is the first on the list, make it so. 6695 */ 6696 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6697 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6698 } 6699 return (0); 6700 } 6701} 6702 6703int 6704sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6705{ 6706 /* 6707 * This function serves two purposes. It will see if a TAG can be 6708 * re-used and return 1 for yes it is ok and 0 for don't use that 6709 * tag. A secondary function it will do is purge out old tags that 6710 * can be removed. 6711 */ 6712 struct sctpvtaghead *chain; 6713 struct sctp_tagblock *twait_block; 6714 struct sctpasochead *head; 6715 struct sctp_tcb *stcb; 6716 int i; 6717 6718 SCTP_INP_INFO_RLOCK(); 6719 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6720 SCTP_BASE_INFO(hashasocmark))]; 6721 if (head == NULL) { 6722 /* invalid vtag */ 6723 goto skip_vtag_check; 6724 } 6725 LIST_FOREACH(stcb, head, sctp_asocs) { 6726 /* 6727 * We choose not to lock anything here. TCB's can't be 6728 * removed since we have the read lock, so they can't be 6729 * freed on us, same thing for the INP. I may be wrong with 6730 * this assumption, but we will go with it for now :-) 6731 */ 6732 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6733 continue; 6734 } 6735 if (stcb->asoc.my_vtag == tag) { 6736 /* candidate */ 6737 if (stcb->rport != rport) { 6738 continue; 6739 } 6740 if (stcb->sctp_ep->sctp_lport != lport) { 6741 continue; 6742 } 6743 /* Its a used tag set */ 6744 SCTP_INP_INFO_RUNLOCK(); 6745 return (0); 6746 } 6747 } 6748skip_vtag_check: 6749 6750 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6751 /* Now what about timed wait ? */ 6752 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6753 /* 6754 * Block(s) are present, lets see if we have this tag in the 6755 * list 6756 */ 6757 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6758 if (twait_block->vtag_block[i].v_tag == 0) { 6759 /* not used */ 6760 continue; 6761 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6762 now->tv_sec) { 6763 /* Audit expires this guy */ 6764 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6765 twait_block->vtag_block[i].v_tag = 0; 6766 twait_block->vtag_block[i].lport = 0; 6767 twait_block->vtag_block[i].rport = 0; 6768 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6769 (twait_block->vtag_block[i].lport == lport) && 6770 (twait_block->vtag_block[i].rport == rport)) { 6771 /* Bad tag, sorry :< */ 6772 SCTP_INP_INFO_RUNLOCK(); 6773 return (0); 6774 } 6775 } 6776 } 6777 SCTP_INP_INFO_RUNLOCK(); 6778 return (1); 6779} 6780 6781static void 6782sctp_drain_mbufs(struct sctp_tcb *stcb) 6783{ 6784 /* 6785 * We must hunt this association for MBUF's past the cumack (i.e. 6786 * out of order data that we can renege on). 6787 */ 6788 struct sctp_association *asoc; 6789 struct sctp_tmit_chunk *chk, *nchk; 6790 uint32_t cumulative_tsn_p1; 6791 struct sctp_queued_to_read *ctl, *nctl; 6792 int cnt, strmat; 6793 uint32_t gap, i; 6794 int fnd = 0; 6795 6796 /* We look for anything larger than the cum-ack + 1 */ 6797 6798 asoc = &stcb->asoc; 6799 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6800 /* none we can reneg on. */ 6801 return; 6802 } 6803 SCTP_STAT_INCR(sctps_protocol_drains_done); 6804 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6805 cnt = 0; 6806 /* First look in the re-assembly queue */ 6807 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6808 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6809 /* Yep it is above cum-ack */ 6810 cnt++; 6811 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6812 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6813 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6814 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6815 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6816 if (chk->data) { 6817 sctp_m_freem(chk->data); 6818 chk->data = NULL; 6819 } 6820 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6821 } 6822 } 6823 /* Ok that was fun, now we will drain all the inbound streams? */ 6824 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6825 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6826 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6827 /* Yep it is above cum-ack */ 6828 cnt++; 6829 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6830 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6831 sctp_ucount_decr(asoc->cnt_on_all_streams); 6832 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6833 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6834 if (ctl->data) { 6835 sctp_m_freem(ctl->data); 6836 ctl->data = NULL; 6837 } 6838 sctp_free_remote_addr(ctl->whoFrom); 6839 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6840 SCTP_DECR_READQ_COUNT(); 6841 } 6842 } 6843 } 6844 if (cnt) { 6845 /* We must back down to see what the new highest is */ 6846 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6847 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6848 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6849 asoc->highest_tsn_inside_map = i; 6850 fnd = 1; 6851 break; 6852 } 6853 } 6854 if (!fnd) { 6855 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6856 } 6857 /* 6858 * Question, should we go through the delivery queue? The 6859 * only reason things are on here is the app not reading OR 6860 * a p-d-api up. An attacker COULD send enough in to 6861 * initiate the PD-API and then send a bunch of stuff to 6862 * other streams... these would wind up on the delivery 6863 * queue.. and then we would not get to them. But in order 6864 * to do this I then have to back-track and un-deliver 6865 * sequence numbers in streams.. el-yucko. I think for now 6866 * we will NOT look at the delivery queue and leave it to be 6867 * something to consider later. An alternative would be to 6868 * abort the P-D-API with a notification and then deliver 6869 * the data.... Or another method might be to keep track of 6870 * how many times the situation occurs and if we see a 6871 * possible attack underway just abort the association. 6872 */ 6873#ifdef SCTP_DEBUG 6874 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6875#endif 6876 /* 6877 * Now do we need to find a new 6878 * asoc->highest_tsn_inside_map? 6879 */ 6880 asoc->last_revoke_count = cnt; 6881 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6882 /* sa_ignore NO_NULL_CHK */ 6883 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6884 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6885 } 6886 /* 6887 * Another issue, in un-setting the TSN's in the mapping array we 6888 * DID NOT adjust the highest_tsn marker. This will cause one of 6889 * two things to occur. It may cause us to do extra work in checking 6890 * for our mapping array movement. More importantly it may cause us 6891 * to SACK every datagram. This may not be a bad thing though since 6892 * we will recover once we get our cum-ack above and all this stuff 6893 * we dumped recovered. 6894 */ 6895} 6896 6897void 6898sctp_drain() 6899{ 6900 /* 6901 * We must walk the PCB lists for ALL associations here. The system 6902 * is LOW on MBUF's and needs help. This is where reneging will 6903 * occur. We really hope this does NOT happen! 6904 */ 6905 VNET_ITERATOR_DECL(vnet_iter); 6906 VNET_LIST_RLOCK_NOSLEEP(); 6907 VNET_FOREACH(vnet_iter) { 6908 CURVNET_SET(vnet_iter); 6909 struct sctp_inpcb *inp; 6910 struct sctp_tcb *stcb; 6911 6912 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6913 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6914#ifdef VIMAGE 6915 continue; 6916#else 6917 return; 6918#endif 6919 } 6920 SCTP_INP_INFO_RLOCK(); 6921 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6922 /* For each endpoint */ 6923 SCTP_INP_RLOCK(inp); 6924 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6925 /* For each association */ 6926 SCTP_TCB_LOCK(stcb); 6927 sctp_drain_mbufs(stcb); 6928 SCTP_TCB_UNLOCK(stcb); 6929 } 6930 SCTP_INP_RUNLOCK(inp); 6931 } 6932 SCTP_INP_INFO_RUNLOCK(); 6933 CURVNET_RESTORE(); 6934 } 6935 VNET_LIST_RUNLOCK_NOSLEEP(); 6936} 6937 6938/* 6939 * start a new iterator 6940 * iterates through all endpoints and associations based on the pcb_state 6941 * flags and asoc_state. "af" (mandatory) is executed for all matching 6942 * assocs and "ef" (optional) is executed when the iterator completes. 6943 * "inpf" (optional) is executed for each new endpoint as it is being 6944 * iterated through. inpe (optional) is called when the inp completes 6945 * its way through all the stcbs. 6946 */ 6947int 6948sctp_initiate_iterator(inp_func inpf, 6949 asoc_func af, 6950 inp_func inpe, 6951 uint32_t pcb_state, 6952 uint32_t pcb_features, 6953 uint32_t asoc_state, 6954 void *argp, 6955 uint32_t argi, 6956 end_func ef, 6957 struct sctp_inpcb *s_inp, 6958 uint8_t chunk_output_off) 6959{ 6960 struct sctp_iterator *it = NULL; 6961 6962 if (af == NULL) { 6963 return (-1); 6964 } 6965 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6966 SCTP_M_ITER); 6967 if (it == NULL) { 6968 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6969 return (ENOMEM); 6970 } 6971 memset(it, 0, sizeof(*it)); 6972 it->function_assoc = af; 6973 it->function_inp = inpf; 6974 if (inpf) 6975 it->done_current_ep = 0; 6976 else 6977 it->done_current_ep = 1; 6978 it->function_atend = ef; 6979 it->pointer = argp; 6980 it->val = argi; 6981 it->pcb_flags = pcb_state; 6982 it->pcb_features = pcb_features; 6983 it->asoc_state = asoc_state; 6984 it->function_inp_end = inpe; 6985 it->no_chunk_output = chunk_output_off; 6986 it->vn = curvnet; 6987 if (s_inp) { 6988 /* Assume lock is held here */ 6989 it->inp = s_inp; 6990 SCTP_INP_INCR_REF(it->inp); 6991 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6992 } else { 6993 SCTP_INP_INFO_RLOCK(); 6994 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6995 if (it->inp) { 6996 SCTP_INP_INCR_REF(it->inp); 6997 } 6998 SCTP_INP_INFO_RUNLOCK(); 6999 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7000 7001 } 7002 SCTP_IPI_ITERATOR_WQ_LOCK(); 7003 7004 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7005 if (sctp_it_ctl.iterator_running == 0) { 7006 sctp_wakeup_iterator(); 7007 } 7008 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7009 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7010 return (0); 7011} 7012