sctp_bsd_addr.c revision 179783
1/*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * a) Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * b) Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the distribution. 13 * 14 * c) Neither the name of Cisco Systems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31/* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: head/sys/netinet/sctp_bsd_addr.c 179783 2008-06-14 07:58:05Z rrs $"); 35 36#include <netinet/sctp_os.h> 37#include <netinet/sctp_var.h> 38#include <netinet/sctp_pcb.h> 39#include <netinet/sctp_header.h> 40#include <netinet/sctputil.h> 41#include <netinet/sctp_output.h> 42#include <netinet/sctp_bsd_addr.h> 43#include <netinet/sctp_uio.h> 44#include <netinet/sctputil.h> 45#include <netinet/sctp_timer.h> 46#include <netinet/sctp_asconf.h> 47#include <netinet/sctp_sysctl.h> 48#include <netinet/sctp_indata.h> 49#include <sys/unistd.h> 50 51/* Declare all of our malloc named types */ 52 53/* Note to Michael/Peter for mac-os, 54 * I think mac has this too since I 55 * do see the M_PCB type, so I 56 * will also put in the mac file the 57 * MALLOC_DECLARE. If this does not 58 * work for mac uncomment the defines for 59 * the strings that we use in Panda, I put 60 * them in comments in the mac-os file. 61 */ 62MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor"); 63MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array"); 64MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array"); 65MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address"); 66MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator"); 67MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist"); 68MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key"); 69MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list"); 70MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info"); 71MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset"); 72MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer"); 73MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all"); 74MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct"); 75MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct"); 76MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct"); 77MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block"); 78MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list"); 79MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control"); 80MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option"); 81 82 83#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 84void 85sctp_wakeup_iterator(void) 86{ 87 wakeup(&SCTP_BASE_INFO(iterator_running)); 88} 89 90static void 91sctp_iterator_thread(void *v) 92{ 93 SCTP_IPI_ITERATOR_WQ_LOCK(); 94 SCTP_BASE_INFO(iterator_running) = 0; 95 while (1) { 96 msleep(&SCTP_BASE_INFO(iterator_running), 97 &SCTP_BASE_INFO(ipi_iterator_wq_mtx), 98 0, "waiting_for_work", 0); 99 sctp_iterator_worker(); 100 } 101} 102 103void 104sctp_startup_iterator(void) 105{ 106 int ret; 107 108 ret = kproc_create(sctp_iterator_thread, 109 (void *)NULL, 110 &SCTP_BASE_INFO(thread_proc), 111 RFPROC, 112 SCTP_KTHREAD_PAGES, 113 SCTP_KTRHEAD_NAME); 114} 115 116#endif 117 118#ifdef INET6 119void 120sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa) 121{ 122 struct in6_ifaddr *ifa6; 123 124 ifa6 = (struct in6_ifaddr *)ifa->ifa; 125 ifa->flags = ifa6->ia6_flags; 126 if (!ip6_use_deprecated) { 127 if (ifa->flags & 128 IN6_IFF_DEPRECATED) { 129 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 130 } else { 131 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE; 132 } 133 } else { 134 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE; 135 } 136 if (ifa->flags & 137 (IN6_IFF_DETACHED | 138 IN6_IFF_ANYCAST | 139 IN6_IFF_NOTREADY)) { 140 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 141 } else { 142 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE; 143 } 144} 145 146#endif 147 148 149static uint32_t 150sctp_is_desired_interface_type(struct ifaddr *ifa) 151{ 152 int result; 153 154 /* check the interface type to see if it's one we care about */ 155 switch (ifa->ifa_ifp->if_type) { 156 case IFT_ETHER: 157 case IFT_ISO88023: 158 case IFT_ISO88024: 159 case IFT_ISO88025: 160 case IFT_ISO88026: 161 case IFT_STARLAN: 162 case IFT_P10: 163 case IFT_P80: 164 case IFT_HY: 165 case IFT_FDDI: 166 case IFT_XETHER: 167 case IFT_ISDNBASIC: 168 case IFT_ISDNPRIMARY: 169 case IFT_PTPSERIAL: 170 case IFT_OTHER: 171 case IFT_PPP: 172 case IFT_LOOP: 173 case IFT_SLIP: 174 case IFT_GIF: 175 case IFT_IP: 176 case IFT_IPOVERCDLC: 177 case IFT_IPOVERCLAW: 178 case IFT_VIRTUALIPADDRESS: 179 result = 1; 180 break; 181 default: 182 result = 0; 183 } 184 185 return (result); 186} 187 188 189static void 190sctp_init_ifns_for_vrf(int vrfid) 191{ 192 /* 193 * Here we must apply ANY locks needed by the IFN we access and also 194 * make sure we lock any IFA that exists as we float through the 195 * list of IFA's 196 */ 197 struct ifnet *ifn; 198 struct ifaddr *ifa; 199 struct in6_ifaddr *ifa6; 200 struct sctp_ifa *sctp_ifa; 201 uint32_t ifa_flags; 202 203 TAILQ_FOREACH(ifn, &ifnet, if_list) { 204 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) { 205 if (ifa->ifa_addr == NULL) { 206 continue; 207 } 208 if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) { 209 /* non inet/inet6 skip */ 210 continue; 211 } 212 if (ifa->ifa_addr->sa_family == AF_INET6) { 213 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) { 214 /* skip unspecifed addresses */ 215 continue; 216 } 217 } else { 218 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) { 219 continue; 220 } 221 } 222 if (sctp_is_desired_interface_type(ifa) == 0) { 223 /* non desired type */ 224 continue; 225 } 226 if (ifa->ifa_addr->sa_family == AF_INET6) { 227 ifa6 = (struct in6_ifaddr *)ifa; 228 ifa_flags = ifa6->ia6_flags; 229 } else { 230 ifa_flags = 0; 231 } 232 sctp_ifa = sctp_add_addr_to_vrf(vrfid, 233 (void *)ifn, 234 ifn->if_index, 235 ifn->if_type, 236 ifn->if_xname, 237 (void *)ifa, 238 ifa->ifa_addr, 239 ifa_flags, 240 0); 241 if (sctp_ifa) { 242 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 243 } 244 } 245 } 246} 247 248 249void 250sctp_init_vrf_list(int vrfid) 251{ 252 if (vrfid > SCTP_MAX_VRF_ID) 253 /* can't do that */ 254 return; 255 256 /* Don't care about return here */ 257 (void)sctp_allocate_vrf(vrfid); 258 259 /* 260 * Now we need to build all the ifn's for this vrf and there 261 * addresses 262 */ 263 sctp_init_ifns_for_vrf(vrfid); 264} 265 266void 267sctp_addr_change(struct ifaddr *ifa, int cmd) 268{ 269 struct sctp_ifa *ifap = NULL; 270 uint32_t ifa_flags = 0; 271 272 /* 273 * BSD only has one VRF, if this changes we will need to hook in the 274 * right things here to get the id to pass to the address managment 275 * routine. 276 */ 277 if (SCTP_BASE_VAR(first_time) == 0) { 278 /* Special test to see if my ::1 will showup with this */ 279 SCTP_BASE_VAR(first_time) = 1; 280 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID); 281 } 282 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) { 283 /* don't know what to do with this */ 284 return; 285 } 286 if (ifa->ifa_addr == NULL) { 287 return; 288 } 289 if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) { 290 /* non inet/inet6 skip */ 291 return; 292 } 293 if (ifa->ifa_addr->sa_family == AF_INET6) { 294 ifa_flags = ((struct in6_ifaddr *)ifa)->ia6_flags; 295 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) { 296 /* skip unspecifed addresses */ 297 return; 298 } 299 } else { 300 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) { 301 return; 302 } 303 } 304 305 if (sctp_is_desired_interface_type(ifa) == 0) { 306 /* non desired type */ 307 return; 308 } 309 if (cmd == RTM_ADD) { 310 ifap = sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp, 311 ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type, 312 ifa->ifa_ifp->if_xname, 313 (void *)ifa, ifa->ifa_addr, ifa_flags, 1); 314 } else { 315 316 sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr, 317 ifa->ifa_ifp->if_index, 318 ifa->ifa_ifp->if_xname 319 ); 320 /* 321 * We don't bump refcount here so when it completes the 322 * final delete will happen. 323 */ 324 } 325} 326 327void 328 sctp_add_or_del_interfaces(int (*pred) (struct ifnet *), int add){ 329 struct ifnet *ifn; 330 struct ifaddr *ifa; 331 332 TAILQ_FOREACH(ifn, &ifnet, if_list) { 333 if (!(*pred) (ifn)) { 334 continue; 335 } 336 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) { 337 sctp_addr_change(ifa, add ? RTM_ADD : RTM_DELETE); 338 } 339 } 340} 341 342struct mbuf * 343sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header, 344 int how, int allonebuf, int type) 345{ 346 struct mbuf *m = NULL; 347 348 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0); 349 if (m == NULL) { 350 /* bad, no memory */ 351 return (m); 352 } 353 if (allonebuf) { 354 int siz; 355 356 if (SCTP_BUF_IS_EXTENDED(m)) { 357 siz = SCTP_BUF_EXTEND_SIZE(m); 358 } else { 359 if (want_header) 360 siz = MHLEN; 361 else 362 siz = MLEN; 363 } 364 if (siz < space_needed) { 365 m_freem(m); 366 return (NULL); 367 } 368 } 369 if (SCTP_BUF_NEXT(m)) { 370 sctp_m_freem(SCTP_BUF_NEXT(m)); 371 SCTP_BUF_NEXT(m) = NULL; 372 } 373#ifdef SCTP_MBUF_LOGGING 374 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 375 if (SCTP_BUF_IS_EXTENDED(m)) { 376 sctp_log_mb(m, SCTP_MBUF_IALLOC); 377 } 378 } 379#endif 380 return (m); 381} 382 383 384#ifdef SCTP_PACKET_LOGGING 385void 386sctp_packet_log(struct mbuf *m, int length) 387{ 388 int *lenat, thisone; 389 void *copyto; 390 uint32_t *tick_tock; 391 int total_len; 392 int grabbed_lock = 0; 393 int value, newval, thisend, thisbegin; 394 395 /* 396 * Buffer layout. -sizeof this entry (total_len) -previous end 397 * (value) -ticks of log (ticks) o -ip packet o -as logged - 398 * where this started (thisbegin) x <--end points here 399 */ 400 total_len = SCTP_SIZE32((length + (4 * sizeof(int)))); 401 /* Log a packet to the buffer. */ 402 if (total_len > SCTP_PACKET_LOG_SIZE) { 403 /* Can't log this packet I have not a buffer big enough */ 404 return; 405 } 406 if (length < (int)(SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) { 407 return; 408 } 409 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), 1); 410try_again: 411 if (SCTP_BASE_VAR(packet_log_writers) > SCTP_PKTLOG_WRITERS_NEED_LOCK) { 412 SCTP_IP_PKTLOG_LOCK(); 413 grabbed_lock = 1; 414again_locked: 415 value = SCTP_BASE_VAR(packet_log_end); 416 newval = SCTP_BASE_VAR(packet_log_end) + total_len; 417 if (newval >= SCTP_PACKET_LOG_SIZE) { 418 /* we wrapped */ 419 thisbegin = 0; 420 thisend = total_len; 421 } else { 422 thisbegin = SCTP_BASE_VAR(packet_log_end); 423 thisend = newval; 424 } 425 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) { 426 goto again_locked; 427 } 428 } else { 429 value = SCTP_BASE_VAR(packet_log_end); 430 newval = SCTP_BASE_VAR(packet_log_end) + total_len; 431 if (newval >= SCTP_PACKET_LOG_SIZE) { 432 /* we wrapped */ 433 thisbegin = 0; 434 thisend = total_len; 435 } else { 436 thisbegin = SCTP_BASE_VAR(packet_log_end); 437 thisend = newval; 438 } 439 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) { 440 goto try_again; 441 } 442 } 443 /* Sanity check */ 444 if (thisend >= SCTP_PACKET_LOG_SIZE) { 445 printf("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n", 446 thisbegin, 447 thisend, 448 SCTP_BASE_VAR(packet_log_writers), 449 grabbed_lock, 450 SCTP_BASE_VAR(packet_log_end)); 451 SCTP_BASE_VAR(packet_log_end) = 0; 452 goto no_log; 453 454 } 455 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisbegin]; 456 *lenat = total_len; 457 lenat++; 458 *lenat = value; 459 lenat++; 460 tick_tock = (uint32_t *) lenat; 461 lenat++; 462 *tick_tock = sctp_get_tick_count(); 463 copyto = (void *)lenat; 464 thisone = thisend - sizeof(int); 465 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisone]; 466 *lenat = thisbegin; 467 if (grabbed_lock) { 468 SCTP_IP_PKTLOG_UNLOCK(); 469 grabbed_lock = 0; 470 } 471 m_copydata(m, 0, length, (caddr_t)copyto); 472no_log: 473 if (grabbed_lock) { 474 SCTP_IP_PKTLOG_UNLOCK(); 475 } 476 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 1); 477} 478 479 480int 481sctp_copy_out_packet_log(uint8_t * target, int length) 482{ 483 /* 484 * We wind through the packet log starting at start copying up to 485 * length bytes out. We return the number of bytes copied. 486 */ 487 int tocopy, this_copy; 488 int *lenat; 489 int did_delay = 0; 490 491 tocopy = length; 492 if (length < (int)(2 * sizeof(int))) { 493 /* not enough room */ 494 return (0); 495 } 496 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) { 497 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), SCTP_PKTLOG_WRITERS_NEED_LOCK); 498again: 499 if ((did_delay == 0) && (SCTP_BASE_VAR(packet_log_writers) != SCTP_PKTLOG_WRITERS_NEED_LOCK)) { 500 /* 501 * we delay here for just a moment hoping the 502 * writer(s) that were present when we entered will 503 * have left and we only have locking ones that will 504 * contend with us for the lock. This does not 505 * assure 100% access, but its good enough for a 506 * logging facility like this. 507 */ 508 did_delay = 1; 509 DELAY(10); 510 goto again; 511 } 512 } 513 SCTP_IP_PKTLOG_LOCK(); 514 lenat = (int *)target; 515 *lenat = SCTP_BASE_VAR(packet_log_end); 516 lenat++; 517 this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE); 518 memcpy((void *)lenat, (void *)SCTP_BASE_VAR(packet_log_buffer), this_copy); 519 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) { 520 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 521 SCTP_PKTLOG_WRITERS_NEED_LOCK); 522 } 523 SCTP_IP_PKTLOG_UNLOCK(); 524 return (this_copy + sizeof(int)); 525} 526 527#endif 528