1 /* $NetBSD: in6_pcb.c,v 1.118 2011/12/31 20:41:59 christos Exp $ */ 2 /* $KAME: in6_pcb.c,v 1.84 2001/02/08 18:02:08 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1991, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: in6_pcb.c,v 1.118 2011/12/31 20:41:59 christos Exp $"); 66 67 #include "opt_inet.h" 68 #include "opt_ipsec.h" 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/malloc.h> 73 #include <sys/mbuf.h> 74 #include <sys/protosw.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/ioctl.h> 78 #include <sys/errno.h> 79 #include <sys/time.h> 80 #include <sys/proc.h> 81 #include <sys/kauth.h> 82 #include <sys/domain.h> 83 #include <sys/once.h> 84 85 #include <net/if.h> 86 #include <net/route.h> 87 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 #include <netinet/in_systm.h> 91 #include <netinet/ip.h> 92 #include <netinet/in_pcb.h> 93 #include <netinet/ip6.h> 94 #include <netinet/rfc6056.h> 95 #include <netinet6/ip6_var.h> 96 #include <netinet6/in6_pcb.h> 97 #include <netinet6/scope6_var.h> 98 #include <netinet6/nd6.h> 99 100 #include "faith.h" 101 102 #ifdef KAME_IPSEC 103 #include <netinet6/ipsec.h> 104 #include <netkey/key.h> 105 #endif /* KAME_IPSEC */ 106 107 #ifdef FAST_IPSEC 108 #include <netipsec/ipsec.h> 109 #include <netipsec/ipsec6.h> 110 #include <netipsec/key.h> 111 #endif /* FAST_IPSEC */ 112 113 #include <netinet/tcp_vtw.h> 114 115 const struct in6_addr zeroin6_addr; 116 117 #define IN6PCBHASH_PORT(table, lport) \ 118 &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash] 119 #define IN6PCBHASH_BIND(table, laddr, lport) \ 120 &(table)->inpt_bindhashtbl[ \ 121 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ 122 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + ntohs(lport)) & \ 123 (table)->inpt_bindhash] 124 #define IN6PCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 125 &(table)->inpt_bindhashtbl[ \ 126 ((((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \ 127 (faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3]) + ntohs(fport)) + \ 128 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ 129 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + \ 130 ntohs(lport))) & (table)->inpt_bindhash] 131 132 int ip6_anonportmin = IPV6PORT_ANONMIN; 133 int ip6_anonportmax = IPV6PORT_ANONMAX; 134 int ip6_lowportmin = IPV6PORT_RESERVEDMIN; 135 int ip6_lowportmax = IPV6PORT_RESERVEDMAX; 136 137 static struct pool in6pcb_pool; 138 139 static int 140 in6pcb_poolinit(void) 141 { 142 143 pool_init(&in6pcb_pool, sizeof(struct in6pcb), 0, 0, 0, "in6pcbpl", 144 NULL, IPL_SOFTNET); 145 return 0; 146 } 147 148 void 149 in6_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize) 150 { 151 static ONCE_DECL(control); 152 153 in_pcbinit(table, bindhashsize, connecthashsize); 154 table->inpt_lastport = (u_int16_t)ip6_anonportmax; 155 156 RUN_ONCE(&control, in6pcb_poolinit); 157 } 158 159 int 160 in6_pcballoc(struct socket *so, void *v) 161 { 162 struct inpcbtable *table = v; 163 struct in6pcb *in6p; 164 int s; 165 #if defined(KAME_IPSEC) || defined(FAST_IPSEC) 166 int error; 167 #endif 168 169 s = splnet(); 170 in6p = pool_get(&in6pcb_pool, PR_NOWAIT); 171 splx(s); 172 if (in6p == NULL) 173 return (ENOBUFS); 174 memset((void *)in6p, 0, sizeof(*in6p)); 175 in6p->in6p_af = AF_INET6; 176 in6p->in6p_table = table; 177 in6p->in6p_socket = so; 178 in6p->in6p_hops = -1; /* use kernel default */ 179 in6p->in6p_icmp6filt = NULL; 180 in6p->in6p_rfc6056algo = RFC6056_ALGO_DEFAULT; 181 in6p->in6p_bindportonsend = false; 182 #if defined(KAME_IPSEC) || defined(FAST_IPSEC) 183 error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp); 184 if (error != 0) { 185 s = splnet(); 186 pool_put(&in6pcb_pool, in6p); 187 splx(s); 188 return error; 189 } 190 #endif /* IPSEC */ 191 s = splnet(); 192 CIRCLEQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p, 193 inph_queue); 194 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 195 &in6p->in6p_head, inph_lhash); 196 in6_pcbstate(in6p, IN6P_ATTACHED); 197 splx(s); 198 if (ip6_v6only) 199 in6p->in6p_flags |= IN6P_IPV6_V6ONLY; 200 so->so_pcb = (void *)in6p; 201 return (0); 202 } 203 204 /* 205 * Bind address from sin6 to in6p. 206 */ 207 static int 208 in6_pcbbind_addr(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 209 { 210 int error; 211 212 /* 213 * We should check the family, but old programs 214 * incorrectly fail to intialize it. 215 */ 216 if (sin6->sin6_family != AF_INET6) 217 return (EAFNOSUPPORT); 218 219 #ifndef INET 220 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 221 return (EADDRNOTAVAIL); 222 #endif 223 224 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 225 return (error); 226 227 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 228 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 229 return (EINVAL); 230 if (sin6->sin6_addr.s6_addr32[3]) { 231 struct sockaddr_in sin; 232 233 memset(&sin, 0, sizeof(sin)); 234 sin.sin_len = sizeof(sin); 235 sin.sin_family = AF_INET; 236 bcopy(&sin6->sin6_addr.s6_addr32[3], 237 &sin.sin_addr, sizeof(sin.sin_addr)); 238 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 239 return EADDRNOTAVAIL; 240 } 241 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 242 struct ifaddr *ia = NULL; 243 244 if ((in6p->in6p_flags & IN6P_FAITH) == 0 && 245 (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 246 return (EADDRNOTAVAIL); 247 248 /* 249 * bind to an anycast address might accidentally 250 * cause sending a packet with an anycast source 251 * address, so we forbid it. 252 * 253 * We should allow to bind to a deprecated address, 254 * since the application dare to use it. 255 * But, can we assume that they are careful enough 256 * to check if the address is deprecated or not? 257 * Maybe, as a safeguard, we should have a setsockopt 258 * flag to control the bind(2) behavior against 259 * deprecated addresses (default: forbid bind(2)). 260 */ 261 if (ia && 262 ((struct in6_ifaddr *)ia)->ia6_flags & 263 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) 264 return (EADDRNOTAVAIL); 265 } 266 267 268 in6p->in6p_laddr = sin6->sin6_addr; 269 270 271 return (0); 272 } 273 274 /* 275 * Bind port from sin6 to in6p. 276 */ 277 static int 278 in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 279 { 280 struct inpcbtable *table = in6p->in6p_table; 281 struct socket *so = in6p->in6p_socket; 282 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 283 int error; 284 285 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 286 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 287 (so->so_options & SO_ACCEPTCONN) == 0)) 288 wild = 1; 289 290 if (sin6->sin6_port != 0) { 291 enum kauth_network_req req; 292 293 #ifndef IPNOPRIVPORTS 294 if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED) 295 req = KAUTH_REQ_NETWORK_BIND_PRIVPORT; 296 else 297 #endif /* IPNOPRIVPORTS */ 298 req = KAUTH_REQ_NETWORK_BIND_PORT; 299 300 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND, 301 req, so, sin6, NULL); 302 if (error) 303 return (EACCES); 304 } 305 306 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 307 /* 308 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 309 * allow compepte duplication of binding if 310 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 311 * and a multicast address is bound on both 312 * new and duplicated sockets. 313 */ 314 if (so->so_options & SO_REUSEADDR) 315 reuseport = SO_REUSEADDR|SO_REUSEPORT; 316 } 317 318 if (sin6->sin6_port != 0) { 319 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 320 #ifdef INET 321 struct inpcb *t; 322 struct vestigial_inpcb vestige; 323 324 t = in_pcblookup_port(table, 325 *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 326 sin6->sin6_port, wild, &vestige); 327 if (t && (reuseport & t->inp_socket->so_options) == 0) 328 return (EADDRINUSE); 329 if (!t 330 && vestige.valid 331 && !(reuseport && vestige.reuse_port)) 332 return EADDRINUSE; 333 #else 334 return (EADDRNOTAVAIL); 335 #endif 336 } 337 338 { 339 struct in6pcb *t; 340 struct vestigial_inpcb vestige; 341 342 t = in6_pcblookup_port(table, &sin6->sin6_addr, 343 sin6->sin6_port, wild, &vestige); 344 if (t && (reuseport & t->in6p_socket->so_options) == 0) 345 return (EADDRINUSE); 346 if (!t 347 && vestige.valid 348 && !(reuseport && vestige.reuse_port)) 349 return EADDRINUSE; 350 } 351 } 352 353 if (sin6->sin6_port == 0) { 354 int e; 355 e = in6_pcbsetport(sin6, in6p, l); 356 if (e != 0) 357 return (e); 358 } else { 359 in6p->in6p_lport = sin6->sin6_port; 360 in6_pcbstate(in6p, IN6P_BOUND); 361 } 362 363 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 364 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 365 &in6p->in6p_head, inph_lhash); 366 367 return (0); 368 } 369 370 int 371 in6_pcbbind(void *v, struct mbuf *nam, struct lwp *l) 372 { 373 struct in6pcb *in6p = v; 374 struct sockaddr_in6 lsin6; 375 struct sockaddr_in6 *sin6 = NULL; 376 int error; 377 378 if (in6p->in6p_af != AF_INET6) 379 return (EINVAL); 380 381 /* 382 * If we already have a local port or a local address it means we're 383 * bounded. 384 */ 385 if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 386 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 387 in6p->in6p_laddr.s6_addr32[3] == 0))) 388 return (EINVAL); 389 390 if (nam != NULL) { 391 /* We were provided a sockaddr_in6 to use. */ 392 sin6 = mtod(nam, struct sockaddr_in6 *); 393 if (nam->m_len != sizeof(*sin6)) 394 return (EINVAL); 395 } else { 396 /* We always bind to *something*, even if it's "anything". */ 397 lsin6 = *((const struct sockaddr_in6 *) 398 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 399 sin6 = &lsin6; 400 } 401 402 /* Bind address. */ 403 error = in6_pcbbind_addr(in6p, sin6, l); 404 if (error) 405 return (error); 406 407 /* Bind port. */ 408 error = in6_pcbbind_port(in6p, sin6, l); 409 if (error) { 410 /* 411 * Reset the address here to "any" so we don't "leak" the 412 * in6pcb. 413 */ 414 in6p->in6p_laddr = in6addr_any; 415 416 return (error); 417 } 418 419 420 #if 0 421 in6p->in6p_flowinfo = 0; /* XXX */ 422 #endif 423 return (0); 424 } 425 426 /* 427 * Connect from a socket to a specified address. 428 * Both address and port must be specified in argument sin6. 429 * If don't have a local address for this socket yet, 430 * then pick one. 431 */ 432 int 433 in6_pcbconnect(void *v, struct mbuf *nam, struct lwp *l) 434 { 435 struct rtentry *rt; 436 struct in6pcb *in6p = v; 437 struct in6_addr *in6a = NULL; 438 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 439 struct ifnet *ifp = NULL; /* outgoing interface */ 440 int error = 0; 441 int scope_ambiguous = 0; 442 #ifdef INET 443 struct in6_addr mapped; 444 #endif 445 struct sockaddr_in6 tmp; 446 struct vestigial_inpcb vestige; 447 448 (void)&in6a; /* XXX fool gcc */ 449 450 if (in6p->in6p_af != AF_INET6) 451 return (EINVAL); 452 453 if (nam->m_len != sizeof(*sin6)) 454 return (EINVAL); 455 if (sin6->sin6_family != AF_INET6) 456 return (EAFNOSUPPORT); 457 if (sin6->sin6_port == 0) 458 return (EADDRNOTAVAIL); 459 460 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) 461 scope_ambiguous = 1; 462 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 463 return(error); 464 465 /* sanity check for mapped address case */ 466 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 467 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 468 return EINVAL; 469 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 470 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 471 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 472 return EINVAL; 473 } else 474 { 475 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 476 return EINVAL; 477 } 478 479 /* protect *sin6 from overwrites */ 480 tmp = *sin6; 481 sin6 = &tmp; 482 483 /* Source address selection. */ 484 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 485 in6p->in6p_laddr.s6_addr32[3] == 0) { 486 #ifdef INET 487 struct sockaddr_in sin, *sinp; 488 489 memset(&sin, 0, sizeof(sin)); 490 sin.sin_len = sizeof(sin); 491 sin.sin_family = AF_INET; 492 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3], 493 sizeof(sin.sin_addr)); 494 sinp = in_selectsrc(&sin, &in6p->in6p_route, 495 in6p->in6p_socket->so_options, NULL, &error); 496 if (sinp == 0) { 497 if (error == 0) 498 error = EADDRNOTAVAIL; 499 return (error); 500 } 501 memset(&mapped, 0, sizeof(mapped)); 502 mapped.s6_addr16[5] = htons(0xffff); 503 memcpy(&mapped.s6_addr32[3], &sinp->sin_addr, sizeof(sinp->sin_addr)); 504 in6a = &mapped; 505 #else 506 return EADDRNOTAVAIL; 507 #endif 508 } else { 509 /* 510 * XXX: in6_selectsrc might replace the bound local address 511 * with the address specified by setsockopt(IPV6_PKTINFO). 512 * Is it the intended behavior? 513 */ 514 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 515 in6p->in6p_moptions, 516 &in6p->in6p_route, 517 &in6p->in6p_laddr, &ifp, &error); 518 if (ifp && scope_ambiguous && 519 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 520 return(error); 521 } 522 523 if (in6a == 0) { 524 if (error == 0) 525 error = EADDRNOTAVAIL; 526 return (error); 527 } 528 } 529 if (ifp == NULL && (rt = rtcache_validate(&in6p->in6p_route)) != NULL) 530 ifp = rt->rt_ifp; 531 532 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 533 534 if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr, 535 sin6->sin6_port, 536 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr, 537 in6p->in6p_lport, 0, &vestige) 538 || vestige.valid) 539 return (EADDRINUSE); 540 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 541 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 542 in6p->in6p_laddr.s6_addr32[3] == 0)) 543 { 544 if (in6p->in6p_lport == 0) { 545 error = in6_pcbbind(in6p, NULL, l); 546 if (error != 0) 547 return error; 548 } 549 in6p->in6p_laddr = *in6a; 550 } 551 in6p->in6p_faddr = sin6->sin6_addr; 552 in6p->in6p_fport = sin6->sin6_port; 553 554 /* Late bind, if needed */ 555 if (in6p->in6p_bindportonsend) { 556 struct sockaddr_in6 lsin = *((const struct sockaddr_in6 *) 557 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 558 lsin.sin6_addr = in6p->in6p_laddr; 559 lsin.sin6_port = 0; 560 561 if ((error = in6_pcbbind_port(in6p, &lsin, l)) != 0) 562 return error; 563 } 564 565 in6_pcbstate(in6p, IN6P_CONNECTED); 566 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 567 if (ip6_auto_flowlabel) 568 in6p->in6p_flowinfo |= 569 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 570 #if defined(KAME_IPSEC) || defined(FAST_IPSEC) 571 if (in6p->in6p_socket->so_type == SOCK_STREAM) 572 ipsec_pcbconn(in6p->in6p_sp); 573 #endif 574 return (0); 575 } 576 577 void 578 in6_pcbdisconnect(struct in6pcb *in6p) 579 { 580 memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr)); 581 in6p->in6p_fport = 0; 582 in6_pcbstate(in6p, IN6P_BOUND); 583 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 584 #if defined(KAME_IPSEC) || defined(FAST_IPSEC) 585 ipsec_pcbdisconn(in6p->in6p_sp); 586 #endif 587 if (in6p->in6p_socket->so_state & SS_NOFDREF) 588 in6_pcbdetach(in6p); 589 } 590 591 void 592 in6_pcbdetach(struct in6pcb *in6p) 593 { 594 struct socket *so = in6p->in6p_socket; 595 int s; 596 597 if (in6p->in6p_af != AF_INET6) 598 return; 599 600 #if defined(KAME_IPSEC) || defined(FAST_IPSEC) 601 ipsec6_delete_pcbpolicy(in6p); 602 #endif /* IPSEC */ 603 so->so_pcb = 0; 604 if (in6p->in6p_options) 605 m_freem(in6p->in6p_options); 606 if (in6p->in6p_outputopts != NULL) { 607 ip6_clearpktopts(in6p->in6p_outputopts, -1); 608 free(in6p->in6p_outputopts, M_IP6OPT); 609 } 610 rtcache_free(&in6p->in6p_route); 611 ip6_freemoptions(in6p->in6p_moptions); 612 s = splnet(); 613 in6_pcbstate(in6p, IN6P_ATTACHED); 614 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 615 CIRCLEQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head, 616 inph_queue); 617 pool_put(&in6pcb_pool, in6p); 618 splx(s); 619 sofree(so); /* drops the socket's lock */ 620 mutex_enter(softnet_lock); /* reacquire it */ 621 } 622 623 void 624 in6_setsockaddr(struct in6pcb *in6p, struct mbuf *nam) 625 { 626 struct sockaddr_in6 *sin6; 627 628 if (in6p->in6p_af != AF_INET6) 629 return; 630 631 nam->m_len = sizeof(*sin6); 632 sin6 = mtod(nam, struct sockaddr_in6 *); 633 sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0); 634 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 635 } 636 637 void 638 in6_setpeeraddr(struct in6pcb *in6p, struct mbuf *nam) 639 { 640 struct sockaddr_in6 *sin6; 641 642 if (in6p->in6p_af != AF_INET6) 643 return; 644 645 nam->m_len = sizeof(*sin6); 646 sin6 = mtod(nam, struct sockaddr_in6 *); 647 sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0); 648 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 649 } 650 651 /* 652 * Pass some notification to all connections of a protocol 653 * associated with address dst. The local address and/or port numbers 654 * may be specified to limit the search. The "usual action" will be 655 * taken, depending on the ctlinput cmd. The caller must filter any 656 * cmds that are uninteresting (e.g., no error in the map). 657 * Call the protocol specific routine (if any) to report 658 * any errors for each matching socket. 659 * 660 * Must be called at splsoftnet. 661 * 662 * Note: src (4th arg) carries the flowlabel value on the original IPv6 663 * header, in sin6_flowinfo member. 664 */ 665 int 666 in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst, 667 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd, 668 void *cmdarg, void (*notify)(struct in6pcb *, int)) 669 { 670 struct rtentry *rt; 671 struct in6pcb *in6p, *nin6p; 672 struct sockaddr_in6 sa6_src; 673 const struct sockaddr_in6 *sa6_dst; 674 u_int16_t fport = fport_arg, lport = lport_arg; 675 int errno; 676 int nmatch = 0; 677 u_int32_t flowinfo; 678 679 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 680 return 0; 681 682 sa6_dst = (const struct sockaddr_in6 *)dst; 683 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 684 return 0; 685 686 /* 687 * note that src can be NULL when we get notify by local fragmentation. 688 */ 689 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 690 flowinfo = sa6_src.sin6_flowinfo; 691 692 /* 693 * Redirects go to all references to the destination, 694 * and use in6_rtchange to invalidate the route cache. 695 * Dead host indications: also use in6_rtchange to invalidate 696 * the cache, and deliver the error to all the sockets. 697 * Otherwise, if we have knowledge of the local port and address, 698 * deliver only to that socket. 699 */ 700 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 701 fport = 0; 702 lport = 0; 703 memset((void *)&sa6_src.sin6_addr, 0, sizeof(sa6_src.sin6_addr)); 704 705 if (cmd != PRC_HOSTDEAD) 706 notify = in6_rtchange; 707 } 708 709 errno = inet6ctlerrmap[cmd]; 710 for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue); 711 in6p != (void *)&table->inpt_queue; 712 in6p = nin6p) { 713 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue); 714 715 if (in6p->in6p_af != AF_INET6) 716 continue; 717 718 /* 719 * Under the following condition, notify of redirects 720 * to the pcb, without making address matches against inpcb. 721 * - redirect notification is arrived. 722 * - the inpcb is unconnected. 723 * - the inpcb is caching !RTF_HOST routing entry. 724 * - the ICMPv6 notification is from the gateway cached in the 725 * inpcb. i.e. ICMPv6 notification is from nexthop gateway 726 * the inpcb used very recently. 727 * 728 * This is to improve interaction between netbsd/openbsd 729 * redirect handling code, and inpcb route cache code. 730 * without the clause, !RTF_HOST routing entry (which carries 731 * gateway used by inpcb right before the ICMPv6 redirect) 732 * will be cached forever in unconnected inpcb. 733 * 734 * There still is a question regarding to what is TRT: 735 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be 736 * generated on packet output. inpcb will always cache 737 * RTF_HOST routing entry so there's no need for the clause 738 * (ICMPv6 redirect will update RTF_HOST routing entry, 739 * and inpcb is caching it already). 740 * However, bsdi/freebsd are vulnerable to local DoS attacks 741 * due to the cloned routing entries. 742 * - Specwise, "destination cache" is mentioned in RFC2461. 743 * Jinmei says that it implies bsdi/freebsd behavior, itojun 744 * is not really convinced. 745 * - Having hiwat/lowat on # of cloned host route (redirect/ 746 * pmtud) may be a good idea. netbsd/openbsd has it. see 747 * icmp6_mtudisc_update(). 748 */ 749 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && 750 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 751 (rt = rtcache_validate(&in6p->in6p_route)) != NULL && 752 !(rt->rt_flags & RTF_HOST)) { 753 const struct sockaddr_in6 *dst6; 754 755 dst6 = (const struct sockaddr_in6 *) 756 rtcache_getdst(&in6p->in6p_route); 757 if (dst6 == NULL) 758 ; 759 else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, 760 &sa6_dst->sin6_addr)) 761 goto do_notify; 762 } 763 764 /* 765 * If the error designates a new path MTU for a destination 766 * and the application (associated with this socket) wanted to 767 * know the value, notify. Note that we notify for all 768 * disconnected sockets if the corresponding application 769 * wanted. This is because some UDP applications keep sending 770 * sockets disconnected. 771 * XXX: should we avoid to notify the value to TCP sockets? 772 */ 773 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 && 774 (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) || 775 IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) { 776 ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst, 777 (u_int32_t *)cmdarg); 778 } 779 780 /* 781 * Detect if we should notify the error. If no source and 782 * destination ports are specified, but non-zero flowinfo and 783 * local address match, notify the error. This is the case 784 * when the error is delivered with an encrypted buffer 785 * by ESP. Otherwise, just compare addresses and ports 786 * as usual. 787 */ 788 if (lport == 0 && fport == 0 && flowinfo && 789 in6p->in6p_socket != NULL && 790 flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 791 IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr)) 792 goto do_notify; 793 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 794 &sa6_dst->sin6_addr) || 795 in6p->in6p_socket == 0 || 796 (lport && in6p->in6p_lport != lport) || 797 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 798 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 799 &sa6_src.sin6_addr)) || 800 (fport && in6p->in6p_fport != fport)) 801 continue; 802 803 do_notify: 804 if (notify) 805 (*notify)(in6p, errno); 806 nmatch++; 807 } 808 return nmatch; 809 } 810 811 void 812 in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) 813 { 814 struct in6pcb *in6p, *nin6p; 815 struct ip6_moptions *im6o; 816 struct in6_multi_mship *imm, *nimm; 817 818 for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue); 819 in6p != (void *)&table->inpt_queue; 820 in6p = nin6p) { 821 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue); 822 if (in6p->in6p_af != AF_INET6) 823 continue; 824 825 im6o = in6p->in6p_moptions; 826 if (im6o) { 827 /* 828 * Unselect the outgoing interface if it is being 829 * detached. 830 */ 831 if (im6o->im6o_multicast_ifp == ifp) 832 im6o->im6o_multicast_ifp = NULL; 833 834 /* 835 * Drop multicast group membership if we joined 836 * through the interface being detached. 837 * XXX controversial - is it really legal for kernel 838 * to force this? 839 */ 840 for (imm = im6o->im6o_memberships.lh_first; 841 imm != NULL; imm = nimm) { 842 nimm = imm->i6mm_chain.le_next; 843 if (imm->i6mm_maddr->in6m_ifp == ifp) { 844 LIST_REMOVE(imm, i6mm_chain); 845 in6_leavegroup(imm); 846 } 847 } 848 } 849 } 850 } 851 852 void 853 in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) 854 { 855 struct rtentry *rt; 856 struct in6pcb *in6p, *nin6p; 857 858 for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue); 859 in6p != (void *)&table->inpt_queue; 860 in6p = nin6p) { 861 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue); 862 if (in6p->in6p_af != AF_INET6) 863 continue; 864 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL && 865 rt->rt_ifp == ifp) 866 in6_rtchange(in6p, 0); 867 } 868 } 869 870 /* 871 * Check for alternatives when higher level complains 872 * about service problems. For now, invalidate cached 873 * routing information. If the route was created dynamically 874 * (by a redirect), time to try a default gateway again. 875 */ 876 void 877 in6_losing(struct in6pcb *in6p) 878 { 879 struct rtentry *rt; 880 struct rt_addrinfo info; 881 882 if (in6p->in6p_af != AF_INET6) 883 return; 884 885 if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL) 886 return; 887 888 memset(&info, 0, sizeof(info)); 889 info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route); 890 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 891 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 892 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 893 if (rt->rt_flags & RTF_DYNAMIC) { 894 (void)rtrequest(RTM_DELETE, rt_getkey(rt), 895 rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL); 896 } 897 /* 898 * A new route can be allocated 899 * the next time output is attempted. 900 */ 901 rtcache_free(&in6p->in6p_route); 902 } 903 904 /* 905 * After a routing change, flush old routing. A new route can be 906 * allocated the next time output is attempted. 907 */ 908 void 909 in6_rtchange(struct in6pcb *in6p, int errno) 910 { 911 if (in6p->in6p_af != AF_INET6) 912 return; 913 914 rtcache_free(&in6p->in6p_route); 915 /* 916 * A new route can be allocated the next time 917 * output is attempted. 918 */ 919 } 920 921 struct in6pcb * 922 in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6, 923 u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp) 924 { 925 struct inpcbhead *head; 926 struct inpcb_hdr *inph; 927 struct in6pcb *in6p, *match = 0; 928 int matchwild = 3, wildcard; 929 u_int16_t lport = lport_arg; 930 931 if (vp) 932 vp->valid = 0; 933 934 head = IN6PCBHASH_PORT(table, lport); 935 LIST_FOREACH(inph, head, inph_lhash) { 936 in6p = (struct in6pcb *)inph; 937 if (in6p->in6p_af != AF_INET6) 938 continue; 939 940 if (in6p->in6p_lport != lport) 941 continue; 942 wildcard = 0; 943 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 944 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 945 continue; 946 } 947 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 948 wildcard++; 949 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 950 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 951 continue; 952 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 953 continue; 954 955 /* duplicate of IPv4 logic */ 956 wildcard = 0; 957 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) && 958 in6p->in6p_faddr.s6_addr32[3]) 959 wildcard++; 960 if (!in6p->in6p_laddr.s6_addr32[3]) { 961 if (laddr6->s6_addr32[3]) 962 wildcard++; 963 } else { 964 if (!laddr6->s6_addr32[3]) 965 wildcard++; 966 else { 967 if (in6p->in6p_laddr.s6_addr32[3] != 968 laddr6->s6_addr32[3]) 969 continue; 970 } 971 } 972 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 973 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 974 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 975 continue; 976 } 977 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 978 wildcard++; 979 } else { 980 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 981 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 982 continue; 983 } 984 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 985 wildcard++; 986 else { 987 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 988 laddr6)) 989 continue; 990 } 991 } 992 if (wildcard && !lookup_wildcard) 993 continue; 994 if (wildcard < matchwild) { 995 match = in6p; 996 matchwild = wildcard; 997 if (matchwild == 0) 998 break; 999 } 1000 } 1001 if (match && matchwild == 0) 1002 return match; 1003 1004 if (vp && table->vestige && table->vestige->init_ports6) { 1005 struct vestigial_inpcb better; 1006 void *state; 1007 1008 state = (*table->vestige->init_ports6)(laddr6, 1009 lport_arg, 1010 lookup_wildcard); 1011 while (table->vestige 1012 && (*table->vestige->next_port6)(state, vp)) { 1013 1014 if (vp->lport != lport) 1015 continue; 1016 wildcard = 0; 1017 if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6)) 1018 wildcard++; 1019 if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) { 1020 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1021 wildcard++; 1022 } else { 1023 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1024 if (vp->v6only) 1025 continue; 1026 } 1027 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1028 wildcard++; 1029 else { 1030 if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6)) 1031 continue; 1032 } 1033 } 1034 if (wildcard && !lookup_wildcard) 1035 continue; 1036 if (wildcard < matchwild) { 1037 better = *vp; 1038 match = (void*)&better; 1039 1040 matchwild = wildcard; 1041 if (matchwild == 0) 1042 break; 1043 } 1044 } 1045 1046 if (match) { 1047 if (match != (void*)&better) 1048 return match; 1049 else { 1050 *vp = better; 1051 return 0; 1052 } 1053 } 1054 } 1055 return (match); 1056 } 1057 #undef continue 1058 1059 /* 1060 * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to 1061 * IPv4 mapped address. 1062 */ 1063 struct rtentry * 1064 in6_pcbrtentry(struct in6pcb *in6p) 1065 { 1066 struct rtentry *rt; 1067 struct route *ro; 1068 union { 1069 const struct sockaddr *sa; 1070 const struct sockaddr_in6 *sa6; 1071 #ifdef INET 1072 const struct sockaddr_in *sa4; 1073 #endif 1074 } cdst; 1075 1076 ro = &in6p->in6p_route; 1077 1078 if (in6p->in6p_af != AF_INET6) 1079 return (NULL); 1080 1081 cdst.sa = rtcache_getdst(ro); 1082 if (cdst.sa == NULL) 1083 ; 1084 #ifdef INET 1085 else if (cdst.sa->sa_family == AF_INET) { 1086 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)); 1087 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3]) 1088 rtcache_free(ro); 1089 } 1090 #endif 1091 else { 1092 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr, 1093 &in6p->in6p_faddr)) 1094 rtcache_free(ro); 1095 } 1096 if ((rt = rtcache_validate(ro)) == NULL) 1097 rt = rtcache_update(ro, 1); 1098 #ifdef INET 1099 if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 1100 union { 1101 struct sockaddr dst; 1102 struct sockaddr_in dst4; 1103 } u; 1104 struct in_addr addr; 1105 1106 addr.s_addr = in6p->in6p_faddr.s6_addr32[3]; 1107 1108 sockaddr_in_init(&u.dst4, &addr, 0); 1109 rtcache_setdst(ro, &u.dst); 1110 1111 rt = rtcache_init(ro); 1112 } else 1113 #endif 1114 if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 1115 union { 1116 struct sockaddr dst; 1117 struct sockaddr_in6 dst6; 1118 } u; 1119 1120 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0); 1121 rtcache_setdst(ro, &u.dst); 1122 1123 rt = rtcache_init(ro); 1124 } 1125 return rt; 1126 } 1127 1128 struct in6pcb * 1129 in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6, 1130 u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg, 1131 int faith, 1132 struct vestigial_inpcb *vp) 1133 { 1134 struct inpcbhead *head; 1135 struct inpcb_hdr *inph; 1136 struct in6pcb *in6p; 1137 u_int16_t fport = fport_arg, lport = lport_arg; 1138 1139 if (vp) 1140 vp->valid = 0; 1141 1142 head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport); 1143 LIST_FOREACH(inph, head, inph_hash) { 1144 in6p = (struct in6pcb *)inph; 1145 if (in6p->in6p_af != AF_INET6) 1146 continue; 1147 1148 /* find exact match on both source and dest */ 1149 if (in6p->in6p_fport != fport) 1150 continue; 1151 if (in6p->in6p_lport != lport) 1152 continue; 1153 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 1154 continue; 1155 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 1156 continue; 1157 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 1158 continue; 1159 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1160 continue; 1161 if ((IN6_IS_ADDR_V4MAPPED(laddr6) || 1162 IN6_IS_ADDR_V4MAPPED(faddr6)) && 1163 (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) 1164 continue; 1165 return in6p; 1166 } 1167 if (vp && table->vestige) { 1168 if ((*table->vestige->lookup6)(faddr6, fport_arg, 1169 laddr6, lport_arg, vp)) 1170 return 0; 1171 } 1172 1173 return NULL; 1174 } 1175 1176 struct in6pcb * 1177 in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6, 1178 u_int lport_arg, int faith) 1179 { 1180 struct inpcbhead *head; 1181 struct inpcb_hdr *inph; 1182 struct in6pcb *in6p; 1183 u_int16_t lport = lport_arg; 1184 #ifdef INET 1185 struct in6_addr zero_mapped; 1186 #endif 1187 1188 head = IN6PCBHASH_BIND(table, laddr6, lport); 1189 LIST_FOREACH(inph, head, inph_hash) { 1190 in6p = (struct in6pcb *)inph; 1191 if (in6p->in6p_af != AF_INET6) 1192 continue; 1193 1194 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1195 continue; 1196 if (in6p->in6p_fport != 0) 1197 continue; 1198 if (in6p->in6p_lport != lport) 1199 continue; 1200 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1201 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1202 continue; 1203 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1204 goto out; 1205 } 1206 #ifdef INET 1207 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1208 memset(&zero_mapped, 0, sizeof(zero_mapped)); 1209 zero_mapped.s6_addr16[5] = 0xffff; 1210 head = IN6PCBHASH_BIND(table, &zero_mapped, lport); 1211 LIST_FOREACH(inph, head, inph_hash) { 1212 in6p = (struct in6pcb *)inph; 1213 if (in6p->in6p_af != AF_INET6) 1214 continue; 1215 1216 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1217 continue; 1218 if (in6p->in6p_fport != 0) 1219 continue; 1220 if (in6p->in6p_lport != lport) 1221 continue; 1222 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1223 continue; 1224 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped)) 1225 goto out; 1226 } 1227 } 1228 #endif 1229 head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport); 1230 LIST_FOREACH(inph, head, inph_hash) { 1231 in6p = (struct in6pcb *)inph; 1232 if (in6p->in6p_af != AF_INET6) 1233 continue; 1234 1235 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1236 continue; 1237 if (in6p->in6p_fport != 0) 1238 continue; 1239 if (in6p->in6p_lport != lport) 1240 continue; 1241 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1242 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1243 continue; 1244 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr)) 1245 goto out; 1246 } 1247 return (NULL); 1248 1249 out: 1250 inph = &in6p->in6p_head; 1251 if (inph != LIST_FIRST(head)) { 1252 LIST_REMOVE(inph, inph_hash); 1253 LIST_INSERT_HEAD(head, inph, inph_hash); 1254 } 1255 return in6p; 1256 } 1257 1258 void 1259 in6_pcbstate(struct in6pcb *in6p, int state) 1260 { 1261 1262 if (in6p->in6p_af != AF_INET6) 1263 return; 1264 1265 if (in6p->in6p_state > IN6P_ATTACHED) 1266 LIST_REMOVE(&in6p->in6p_head, inph_hash); 1267 1268 switch (state) { 1269 case IN6P_BOUND: 1270 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table, 1271 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1272 inph_hash); 1273 break; 1274 case IN6P_CONNECTED: 1275 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table, 1276 &in6p->in6p_faddr, in6p->in6p_fport, 1277 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1278 inph_hash); 1279 break; 1280 } 1281 1282 in6p->in6p_state = state; 1283 } 1284