1 /* $NetBSD: in6_pcb.c,v 1.143 2015/08/24 22:21:27 pooka 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 1.143 2015/08/24 22:21:27 pooka Exp $"); 66 67 #ifdef _KERNEL_OPT 68 #include "opt_inet.h" 69 #include "opt_ipsec.h" 70 #endif 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/mbuf.h> 75 #include <sys/protosw.h> 76 #include <sys/socket.h> 77 #include <sys/socketvar.h> 78 #include <sys/ioctl.h> 79 #include <sys/errno.h> 80 #include <sys/time.h> 81 #include <sys/proc.h> 82 #include <sys/kauth.h> 83 #include <sys/domain.h> 84 #include <sys/once.h> 85 86 #include <net/if.h> 87 #include <net/route.h> 88 89 #include <netinet/in.h> 90 #include <netinet/in_var.h> 91 #include <netinet/in_systm.h> 92 #include <netinet/ip.h> 93 #include <netinet/in_pcb.h> 94 #include <netinet/ip6.h> 95 #include <netinet/portalgo.h> 96 #include <netinet6/ip6_var.h> 97 #include <netinet6/in6_pcb.h> 98 #include <netinet6/scope6_var.h> 99 #include <netinet6/nd6.h> 100 101 #include "faith.h" 102 103 #ifdef IPSEC 104 #include <netipsec/ipsec.h> 105 #include <netipsec/ipsec6.h> 106 #include <netipsec/key.h> 107 #endif /* IPSEC */ 108 109 #include <netinet/tcp_vtw.h> 110 111 const struct in6_addr zeroin6_addr; 112 113 #define IN6PCBHASH_PORT(table, lport) \ 114 &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash] 115 #define IN6PCBHASH_BIND(table, laddr, lport) \ 116 &(table)->inpt_bindhashtbl[ \ 117 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ 118 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + ntohs(lport)) & \ 119 (table)->inpt_bindhash] 120 #define IN6PCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 121 &(table)->inpt_bindhashtbl[ \ 122 ((((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \ 123 (faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3]) + ntohs(fport)) + \ 124 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ 125 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + \ 126 ntohs(lport))) & (table)->inpt_bindhash] 127 128 int ip6_anonportmin = IPV6PORT_ANONMIN; 129 int ip6_anonportmax = IPV6PORT_ANONMAX; 130 int ip6_lowportmin = IPV6PORT_RESERVEDMIN; 131 int ip6_lowportmax = IPV6PORT_RESERVEDMAX; 132 133 static struct pool in6pcb_pool; 134 135 static int 136 in6pcb_poolinit(void) 137 { 138 139 pool_init(&in6pcb_pool, sizeof(struct in6pcb), 0, 0, 0, "in6pcbpl", 140 NULL, IPL_SOFTNET); 141 return 0; 142 } 143 144 void 145 in6_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize) 146 { 147 static ONCE_DECL(control); 148 149 in_pcbinit(table, bindhashsize, connecthashsize); 150 table->inpt_lastport = (u_int16_t)ip6_anonportmax; 151 152 RUN_ONCE(&control, in6pcb_poolinit); 153 } 154 155 int 156 in6_pcballoc(struct socket *so, void *v) 157 { 158 struct inpcbtable *table = v; 159 struct in6pcb *in6p; 160 int s; 161 162 s = splnet(); 163 in6p = pool_get(&in6pcb_pool, PR_NOWAIT); 164 splx(s); 165 if (in6p == NULL) 166 return (ENOBUFS); 167 memset((void *)in6p, 0, sizeof(*in6p)); 168 in6p->in6p_af = AF_INET6; 169 in6p->in6p_table = table; 170 in6p->in6p_socket = so; 171 in6p->in6p_hops = -1; /* use kernel default */ 172 in6p->in6p_icmp6filt = NULL; 173 in6p->in6p_portalgo = PORTALGO_DEFAULT; 174 in6p->in6p_bindportonsend = false; 175 #if defined(IPSEC) 176 if (ipsec_enabled) { 177 int error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp); 178 if (error != 0) { 179 s = splnet(); 180 pool_put(&in6pcb_pool, in6p); 181 splx(s); 182 return error; 183 } 184 } 185 #endif /* IPSEC */ 186 s = splnet(); 187 TAILQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p, 188 inph_queue); 189 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 190 &in6p->in6p_head, inph_lhash); 191 in6_pcbstate(in6p, IN6P_ATTACHED); 192 splx(s); 193 if (ip6_v6only) 194 in6p->in6p_flags |= IN6P_IPV6_V6ONLY; 195 so->so_pcb = (void *)in6p; 196 return (0); 197 } 198 199 /* 200 * Bind address from sin6 to in6p. 201 */ 202 static int 203 in6_pcbbind_addr(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 204 { 205 int error; 206 207 /* 208 * We should check the family, but old programs 209 * incorrectly fail to intialize it. 210 */ 211 if (sin6->sin6_family != AF_INET6) 212 return (EAFNOSUPPORT); 213 214 #ifndef INET 215 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 216 return (EADDRNOTAVAIL); 217 #endif 218 219 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 220 return (error); 221 222 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 223 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 224 return (EINVAL); 225 if (sin6->sin6_addr.s6_addr32[3]) { 226 struct sockaddr_in sin; 227 228 memset(&sin, 0, sizeof(sin)); 229 sin.sin_len = sizeof(sin); 230 sin.sin_family = AF_INET; 231 bcopy(&sin6->sin6_addr.s6_addr32[3], 232 &sin.sin_addr, sizeof(sin.sin_addr)); 233 if (!IN_MULTICAST(sin.sin_addr.s_addr) && 234 ifa_ifwithaddr((struct sockaddr *)&sin) == NULL) 235 return EADDRNOTAVAIL; 236 } 237 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 238 // succeed 239 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 240 struct ifaddr *ia = NULL; 241 242 if ((in6p->in6p_flags & IN6P_FAITH) == 0 && 243 (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == NULL) 244 return (EADDRNOTAVAIL); 245 246 /* 247 * bind to an anycast address might accidentally 248 * cause sending a packet with an anycast source 249 * address, so we forbid it. 250 * 251 * We should allow to bind to a deprecated address, 252 * since the application dare to use it. 253 * But, can we assume that they are careful enough 254 * to check if the address is deprecated or not? 255 * Maybe, as a safeguard, we should have a setsockopt 256 * flag to control the bind(2) behavior against 257 * deprecated addresses (default: forbid bind(2)). 258 */ 259 if (ia && 260 ((struct in6_ifaddr *)ia)->ia6_flags & 261 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) 262 return (EADDRNOTAVAIL); 263 } 264 265 266 in6p->in6p_laddr = sin6->sin6_addr; 267 268 269 return (0); 270 } 271 272 /* 273 * Bind port from sin6 to in6p. 274 */ 275 static int 276 in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 277 { 278 struct inpcbtable *table = in6p->in6p_table; 279 struct socket *so = in6p->in6p_socket; 280 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 281 int error; 282 283 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 284 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 285 (so->so_options & SO_ACCEPTCONN) == 0)) 286 wild = 1; 287 288 if (sin6->sin6_port != 0) { 289 enum kauth_network_req req; 290 291 #ifndef IPNOPRIVPORTS 292 if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED) 293 req = KAUTH_REQ_NETWORK_BIND_PRIVPORT; 294 else 295 #endif /* IPNOPRIVPORTS */ 296 req = KAUTH_REQ_NETWORK_BIND_PORT; 297 298 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND, 299 req, so, sin6, NULL); 300 if (error) 301 return (EACCES); 302 } 303 304 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 305 /* 306 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 307 * allow compepte duplication of binding if 308 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 309 * and a multicast address is bound on both 310 * new and duplicated sockets. 311 */ 312 if (so->so_options & (SO_REUSEADDR | SO_REUSEPORT)) 313 reuseport = SO_REUSEADDR|SO_REUSEPORT; 314 } 315 316 if (sin6->sin6_port != 0) { 317 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 318 #ifdef INET 319 struct inpcb *t; 320 struct vestigial_inpcb vestige; 321 322 t = in_pcblookup_port(table, 323 *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 324 sin6->sin6_port, wild, &vestige); 325 if (t && (reuseport & t->inp_socket->so_options) == 0) 326 return (EADDRINUSE); 327 if (!t 328 && vestige.valid 329 && !(reuseport && vestige.reuse_port)) 330 return EADDRINUSE; 331 #else 332 return (EADDRNOTAVAIL); 333 #endif 334 } 335 336 { 337 struct in6pcb *t; 338 struct vestigial_inpcb vestige; 339 340 t = in6_pcblookup_port(table, &sin6->sin6_addr, 341 sin6->sin6_port, wild, &vestige); 342 if (t && (reuseport & t->in6p_socket->so_options) == 0) 343 return (EADDRINUSE); 344 if (!t 345 && vestige.valid 346 && !(reuseport && vestige.reuse_port)) 347 return EADDRINUSE; 348 } 349 } 350 351 if (sin6->sin6_port == 0) { 352 int e; 353 e = in6_pcbsetport(sin6, in6p, l); 354 if (e != 0) 355 return (e); 356 } else { 357 in6p->in6p_lport = sin6->sin6_port; 358 in6_pcbstate(in6p, IN6P_BOUND); 359 } 360 361 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 362 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 363 &in6p->in6p_head, inph_lhash); 364 365 return (0); 366 } 367 368 int 369 in6_pcbbind(void *v, struct sockaddr_in6 *sin6, struct lwp *l) 370 { 371 struct in6pcb *in6p = v; 372 struct sockaddr_in6 lsin6; 373 int error; 374 375 if (in6p->in6p_af != AF_INET6) 376 return (EINVAL); 377 378 /* 379 * If we already have a local port or a local address it means we're 380 * bounded. 381 */ 382 if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 383 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 384 in6p->in6p_laddr.s6_addr32[3] == 0))) 385 return (EINVAL); 386 387 if (NULL != sin6) { 388 /* We were provided a sockaddr_in6 to use. */ 389 if (sin6->sin6_len != sizeof(*sin6)) 390 return (EINVAL); 391 } else { 392 /* We always bind to *something*, even if it's "anything". */ 393 lsin6 = *((const struct sockaddr_in6 *) 394 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 395 sin6 = &lsin6; 396 } 397 398 /* Bind address. */ 399 error = in6_pcbbind_addr(in6p, sin6, l); 400 if (error) 401 return (error); 402 403 /* Bind port. */ 404 error = in6_pcbbind_port(in6p, sin6, l); 405 if (error) { 406 /* 407 * Reset the address here to "any" so we don't "leak" the 408 * in6pcb. 409 */ 410 in6p->in6p_laddr = in6addr_any; 411 412 return (error); 413 } 414 415 416 #if 0 417 in6p->in6p_flowinfo = 0; /* XXX */ 418 #endif 419 return (0); 420 } 421 422 /* 423 * Connect from a socket to a specified address. 424 * Both address and port must be specified in argument sin6. 425 * If don't have a local address for this socket yet, 426 * then pick one. 427 */ 428 int 429 in6_pcbconnect(void *v, struct sockaddr_in6 *sin6, struct lwp *l) 430 { 431 struct in6pcb *in6p = v; 432 struct in6_addr *in6a = NULL; 433 struct ifnet *ifp = NULL; /* outgoing interface */ 434 int error = 0; 435 int scope_ambiguous = 0; 436 #ifdef INET 437 struct in6_addr mapped; 438 #endif 439 struct sockaddr_in6 tmp; 440 struct vestigial_inpcb vestige; 441 442 (void)&in6a; /* XXX fool gcc */ 443 444 if (in6p->in6p_af != AF_INET6) 445 return (EINVAL); 446 447 if (sin6->sin6_len != sizeof(*sin6)) 448 return (EINVAL); 449 if (sin6->sin6_family != AF_INET6) 450 return (EAFNOSUPPORT); 451 if (sin6->sin6_port == 0) 452 return (EADDRNOTAVAIL); 453 454 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 455 in6p->in6p_socket->so_type == SOCK_STREAM) 456 return EADDRNOTAVAIL; 457 458 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) 459 scope_ambiguous = 1; 460 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 461 return(error); 462 463 /* sanity check for mapped address case */ 464 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 465 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 466 return EINVAL; 467 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 468 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 469 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 470 return EINVAL; 471 } else 472 { 473 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 474 return EINVAL; 475 } 476 477 /* protect *sin6 from overwrites */ 478 tmp = *sin6; 479 sin6 = &tmp; 480 481 /* Source address selection. */ 482 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 483 in6p->in6p_laddr.s6_addr32[3] == 0) { 484 #ifdef INET 485 struct sockaddr_in sin, *sinp; 486 487 memset(&sin, 0, sizeof(sin)); 488 sin.sin_len = sizeof(sin); 489 sin.sin_family = AF_INET; 490 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3], 491 sizeof(sin.sin_addr)); 492 sinp = in_selectsrc(&sin, &in6p->in6p_route, 493 in6p->in6p_socket->so_options, NULL, &error); 494 if (sinp == NULL) { 495 if (error == 0) 496 error = EADDRNOTAVAIL; 497 return (error); 498 } 499 memset(&mapped, 0, sizeof(mapped)); 500 mapped.s6_addr16[5] = htons(0xffff); 501 memcpy(&mapped.s6_addr32[3], &sinp->sin_addr, sizeof(sinp->sin_addr)); 502 in6a = &mapped; 503 #else 504 return EADDRNOTAVAIL; 505 #endif 506 } else { 507 /* 508 * XXX: in6_selectsrc might replace the bound local address 509 * with the address specified by setsockopt(IPV6_PKTINFO). 510 * Is it the intended behavior? 511 */ 512 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 513 in6p->in6p_moptions, 514 &in6p->in6p_route, 515 &in6p->in6p_laddr, &ifp, &error); 516 if (ifp && scope_ambiguous && 517 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 518 return(error); 519 } 520 521 if (in6a == NULL) { 522 if (error == 0) 523 error = EADDRNOTAVAIL; 524 return (error); 525 } 526 } 527 528 if (ifp != NULL) 529 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 530 else 531 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim_rt(in6p); 532 533 if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr, 534 sin6->sin6_port, 535 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr, 536 in6p->in6p_lport, 0, &vestige) 537 || vestige.valid) 538 return (EADDRINUSE); 539 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 540 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 541 in6p->in6p_laddr.s6_addr32[3] == 0)) 542 { 543 if (in6p->in6p_lport == 0) { 544 error = in6_pcbbind(in6p, NULL, l); 545 if (error != 0) 546 return error; 547 } 548 in6p->in6p_laddr = *in6a; 549 } 550 in6p->in6p_faddr = sin6->sin6_addr; 551 in6p->in6p_fport = sin6->sin6_port; 552 553 /* Late bind, if needed */ 554 if (in6p->in6p_bindportonsend) { 555 struct sockaddr_in6 lsin = *((const struct sockaddr_in6 *) 556 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 557 lsin.sin6_addr = in6p->in6p_laddr; 558 lsin.sin6_port = 0; 559 560 if ((error = in6_pcbbind_port(in6p, &lsin, l)) != 0) 561 return error; 562 } 563 564 in6_pcbstate(in6p, IN6P_CONNECTED); 565 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 566 if (ip6_auto_flowlabel) 567 in6p->in6p_flowinfo |= 568 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 569 #if defined(IPSEC) 570 if (ipsec_enabled && in6p->in6p_socket->so_type == SOCK_STREAM) 571 ipsec_pcbconn(in6p->in6p_sp); 572 #endif 573 return (0); 574 } 575 576 void 577 in6_pcbdisconnect(struct in6pcb *in6p) 578 { 579 memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr)); 580 in6p->in6p_fport = 0; 581 in6_pcbstate(in6p, IN6P_BOUND); 582 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 583 #if defined(IPSEC) 584 if (ipsec_enabled) 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(IPSEC) 601 if (ipsec_enabled) 602 ipsec6_delete_pcbpolicy(in6p); 603 #endif 604 so->so_pcb = NULL; 605 606 s = splnet(); 607 in6_pcbstate(in6p, IN6P_ATTACHED); 608 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 609 TAILQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head, 610 inph_queue); 611 splx(s); 612 613 if (in6p->in6p_options) { 614 m_freem(in6p->in6p_options); 615 } 616 if (in6p->in6p_outputopts != NULL) { 617 ip6_clearpktopts(in6p->in6p_outputopts, -1); 618 free(in6p->in6p_outputopts, M_IP6OPT); 619 } 620 rtcache_free(&in6p->in6p_route); 621 ip6_freemoptions(in6p->in6p_moptions); 622 ip_freemoptions(in6p->in6p_v4moptions); 623 sofree(so); /* drops the socket's lock */ 624 625 pool_put(&in6pcb_pool, in6p); 626 mutex_enter(softnet_lock); /* reacquire it */ 627 } 628 629 void 630 in6_setsockaddr(struct in6pcb *in6p, struct sockaddr_in6 *sin6) 631 { 632 633 if (in6p->in6p_af != AF_INET6) 634 return; 635 636 sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0); 637 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 638 } 639 640 void 641 in6_setpeeraddr(struct in6pcb *in6p, struct sockaddr_in6 *sin6) 642 { 643 644 if (in6p->in6p_af != AF_INET6) 645 return; 646 647 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 inpcb_hdr *inph, *ninph; 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 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 711 struct in6pcb *in6p = (struct in6pcb *)inph; 712 if (in6p->in6p_af != AF_INET6) 713 continue; 714 715 /* 716 * Under the following condition, notify of redirects 717 * to the pcb, without making address matches against inpcb. 718 * - redirect notification is arrived. 719 * - the inpcb is unconnected. 720 * - the inpcb is caching !RTF_HOST routing entry. 721 * - the ICMPv6 notification is from the gateway cached in the 722 * inpcb. i.e. ICMPv6 notification is from nexthop gateway 723 * the inpcb used very recently. 724 * 725 * This is to improve interaction between netbsd/openbsd 726 * redirect handling code, and inpcb route cache code. 727 * without the clause, !RTF_HOST routing entry (which carries 728 * gateway used by inpcb right before the ICMPv6 redirect) 729 * will be cached forever in unconnected inpcb. 730 * 731 * There still is a question regarding to what is TRT: 732 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be 733 * generated on packet output. inpcb will always cache 734 * RTF_HOST routing entry so there's no need for the clause 735 * (ICMPv6 redirect will update RTF_HOST routing entry, 736 * and inpcb is caching it already). 737 * However, bsdi/freebsd are vulnerable to local DoS attacks 738 * due to the cloned routing entries. 739 * - Specwise, "destination cache" is mentioned in RFC2461. 740 * Jinmei says that it implies bsdi/freebsd behavior, itojun 741 * is not really convinced. 742 * - Having hiwat/lowat on # of cloned host route (redirect/ 743 * pmtud) may be a good idea. netbsd/openbsd has it. see 744 * icmp6_mtudisc_update(). 745 */ 746 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && 747 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 748 (rt = rtcache_validate(&in6p->in6p_route)) != NULL && 749 !(rt->rt_flags & RTF_HOST)) { 750 const struct sockaddr_in6 *dst6; 751 752 dst6 = (const struct sockaddr_in6 *) 753 rtcache_getdst(&in6p->in6p_route); 754 if (dst6 == NULL) 755 ; 756 else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, 757 &sa6_dst->sin6_addr)) 758 goto do_notify; 759 } 760 761 /* 762 * If the error designates a new path MTU for a destination 763 * and the application (associated with this socket) wanted to 764 * know the value, notify. Note that we notify for all 765 * disconnected sockets if the corresponding application 766 * wanted. This is because some UDP applications keep sending 767 * sockets disconnected. 768 * XXX: should we avoid to notify the value to TCP sockets? 769 */ 770 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 && 771 (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) || 772 IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) { 773 ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst, 774 (u_int32_t *)cmdarg); 775 } 776 777 /* 778 * Detect if we should notify the error. If no source and 779 * destination ports are specified, but non-zero flowinfo and 780 * local address match, notify the error. This is the case 781 * when the error is delivered with an encrypted buffer 782 * by ESP. Otherwise, just compare addresses and ports 783 * as usual. 784 */ 785 if (lport == 0 && fport == 0 && flowinfo && 786 in6p->in6p_socket != NULL && 787 flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 788 IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr)) 789 goto do_notify; 790 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 791 &sa6_dst->sin6_addr) || 792 in6p->in6p_socket == NULL || 793 (lport && in6p->in6p_lport != lport) || 794 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 795 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 796 &sa6_src.sin6_addr)) || 797 (fport && in6p->in6p_fport != fport)) 798 continue; 799 800 do_notify: 801 if (notify) 802 (*notify)(in6p, errno); 803 nmatch++; 804 } 805 return nmatch; 806 } 807 808 void 809 in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) 810 { 811 struct inpcb_hdr *inph, *ninph; 812 struct ip6_moptions *im6o; 813 struct in6_multi_mship *imm, *nimm; 814 815 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 816 struct in6pcb *in6p = (struct in6pcb *)inph; 817 if (in6p->in6p_af != AF_INET6) 818 continue; 819 820 im6o = in6p->in6p_moptions; 821 if (im6o) { 822 /* 823 * Unselect the outgoing interface if it is being 824 * detached. 825 */ 826 if (im6o->im6o_multicast_ifp == ifp) 827 im6o->im6o_multicast_ifp = NULL; 828 829 /* 830 * Drop multicast group membership if we joined 831 * through the interface being detached. 832 * XXX controversial - is it really legal for kernel 833 * to force this? 834 */ 835 for (imm = im6o->im6o_memberships.lh_first; 836 imm != NULL; imm = nimm) { 837 nimm = imm->i6mm_chain.le_next; 838 if (imm->i6mm_maddr->in6m_ifp == ifp) { 839 LIST_REMOVE(imm, i6mm_chain); 840 in6_leavegroup(imm); 841 } 842 } 843 } 844 in_purgeifmcast(in6p->in6p_v4moptions, ifp); 845 } 846 } 847 848 void 849 in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) 850 { 851 struct rtentry *rt; 852 struct inpcb_hdr *inph, *ninph; 853 854 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 855 struct in6pcb *in6p = (struct in6pcb *)inph; 856 if (in6p->in6p_af != AF_INET6) 857 continue; 858 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL && 859 rt->rt_ifp == ifp) 860 in6_rtchange(in6p, 0); 861 } 862 } 863 864 /* 865 * Check for alternatives when higher level complains 866 * about service problems. For now, invalidate cached 867 * routing information. If the route was created dynamically 868 * (by a redirect), time to try a default gateway again. 869 */ 870 void 871 in6_losing(struct in6pcb *in6p) 872 { 873 struct rtentry *rt; 874 struct rt_addrinfo info; 875 876 if (in6p->in6p_af != AF_INET6) 877 return; 878 879 if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL) 880 return; 881 882 memset(&info, 0, sizeof(info)); 883 info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route); 884 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 885 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 886 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 887 if (rt->rt_flags & RTF_DYNAMIC) { 888 (void)rtrequest(RTM_DELETE, rt_getkey(rt), 889 rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL); 890 } 891 /* 892 * A new route can be allocated 893 * the next time output is attempted. 894 */ 895 rtcache_free(&in6p->in6p_route); 896 } 897 898 /* 899 * After a routing change, flush old routing. A new route can be 900 * allocated the next time output is attempted. 901 */ 902 void 903 in6_rtchange(struct in6pcb *in6p, int errno) 904 { 905 if (in6p->in6p_af != AF_INET6) 906 return; 907 908 rtcache_free(&in6p->in6p_route); 909 /* 910 * A new route can be allocated the next time 911 * output is attempted. 912 */ 913 } 914 915 struct in6pcb * 916 in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6, 917 u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp) 918 { 919 struct inpcbhead *head; 920 struct inpcb_hdr *inph; 921 struct in6pcb *in6p, *match = NULL; 922 int matchwild = 3, wildcard; 923 u_int16_t lport = lport_arg; 924 925 if (vp) 926 vp->valid = 0; 927 928 head = IN6PCBHASH_PORT(table, lport); 929 LIST_FOREACH(inph, head, inph_lhash) { 930 in6p = (struct in6pcb *)inph; 931 if (in6p->in6p_af != AF_INET6) 932 continue; 933 934 if (in6p->in6p_lport != lport) 935 continue; 936 wildcard = 0; 937 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 938 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 939 continue; 940 } 941 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 942 wildcard++; 943 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 944 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 945 continue; 946 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 947 continue; 948 949 /* duplicate of IPv4 logic */ 950 wildcard = 0; 951 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) && 952 in6p->in6p_faddr.s6_addr32[3]) 953 wildcard++; 954 if (!in6p->in6p_laddr.s6_addr32[3]) { 955 if (laddr6->s6_addr32[3]) 956 wildcard++; 957 } else { 958 if (!laddr6->s6_addr32[3]) 959 wildcard++; 960 else { 961 if (in6p->in6p_laddr.s6_addr32[3] != 962 laddr6->s6_addr32[3]) 963 continue; 964 } 965 } 966 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 967 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 968 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 969 continue; 970 } 971 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 972 wildcard++; 973 } else { 974 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 975 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 976 continue; 977 } 978 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 979 wildcard++; 980 else { 981 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 982 laddr6)) 983 continue; 984 } 985 } 986 if (wildcard && !lookup_wildcard) 987 continue; 988 if (wildcard < matchwild) { 989 match = in6p; 990 matchwild = wildcard; 991 if (matchwild == 0) 992 break; 993 } 994 } 995 if (match && matchwild == 0) 996 return match; 997 998 if (vp && table->vestige && table->vestige->init_ports6) { 999 struct vestigial_inpcb better; 1000 void *state; 1001 1002 state = (*table->vestige->init_ports6)(laddr6, 1003 lport_arg, 1004 lookup_wildcard); 1005 while (table->vestige 1006 && (*table->vestige->next_port6)(state, vp)) { 1007 1008 if (vp->lport != lport) 1009 continue; 1010 wildcard = 0; 1011 if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6)) 1012 wildcard++; 1013 if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) { 1014 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1015 wildcard++; 1016 } else { 1017 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1018 if (vp->v6only) 1019 continue; 1020 } 1021 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1022 wildcard++; 1023 else { 1024 if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6)) 1025 continue; 1026 } 1027 } 1028 if (wildcard && !lookup_wildcard) 1029 continue; 1030 if (wildcard < matchwild) { 1031 better = *vp; 1032 match = (void*)&better; 1033 1034 matchwild = wildcard; 1035 if (matchwild == 0) 1036 break; 1037 } 1038 } 1039 1040 if (match) { 1041 if (match != (void*)&better) 1042 return match; 1043 else { 1044 *vp = better; 1045 return 0; 1046 } 1047 } 1048 } 1049 return (match); 1050 } 1051 1052 /* 1053 * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to 1054 * IPv4 mapped address. 1055 */ 1056 struct rtentry * 1057 in6_pcbrtentry(struct in6pcb *in6p) 1058 { 1059 struct rtentry *rt; 1060 struct route *ro; 1061 union { 1062 const struct sockaddr *sa; 1063 const struct sockaddr_in6 *sa6; 1064 #ifdef INET 1065 const struct sockaddr_in *sa4; 1066 #endif 1067 } cdst; 1068 1069 ro = &in6p->in6p_route; 1070 1071 if (in6p->in6p_af != AF_INET6) 1072 return (NULL); 1073 1074 cdst.sa = rtcache_getdst(ro); 1075 if (cdst.sa == NULL) 1076 ; 1077 #ifdef INET 1078 else if (cdst.sa->sa_family == AF_INET) { 1079 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)); 1080 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3]) 1081 rtcache_free(ro); 1082 } 1083 #endif 1084 else { 1085 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr, 1086 &in6p->in6p_faddr)) 1087 rtcache_free(ro); 1088 } 1089 if ((rt = rtcache_validate(ro)) == NULL) 1090 rt = rtcache_update(ro, 1); 1091 #ifdef INET 1092 if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 1093 union { 1094 struct sockaddr dst; 1095 struct sockaddr_in dst4; 1096 } u; 1097 struct in_addr addr; 1098 1099 addr.s_addr = in6p->in6p_faddr.s6_addr32[3]; 1100 1101 sockaddr_in_init(&u.dst4, &addr, 0); 1102 if (rtcache_setdst(ro, &u.dst) != 0) 1103 return NULL; 1104 1105 rt = rtcache_init(ro); 1106 } else 1107 #endif 1108 if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 1109 union { 1110 struct sockaddr dst; 1111 struct sockaddr_in6 dst6; 1112 } u; 1113 1114 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0); 1115 if (rtcache_setdst(ro, &u.dst) != 0) 1116 return NULL; 1117 1118 rt = rtcache_init(ro); 1119 } 1120 return rt; 1121 } 1122 1123 struct in6pcb * 1124 in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6, 1125 u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg, 1126 int faith, 1127 struct vestigial_inpcb *vp) 1128 { 1129 struct inpcbhead *head; 1130 struct inpcb_hdr *inph; 1131 struct in6pcb *in6p; 1132 u_int16_t fport = fport_arg, lport = lport_arg; 1133 1134 if (vp) 1135 vp->valid = 0; 1136 1137 head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport); 1138 LIST_FOREACH(inph, head, inph_hash) { 1139 in6p = (struct in6pcb *)inph; 1140 if (in6p->in6p_af != AF_INET6) 1141 continue; 1142 1143 /* find exact match on both source and dest */ 1144 if (in6p->in6p_fport != fport) 1145 continue; 1146 if (in6p->in6p_lport != lport) 1147 continue; 1148 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 1149 continue; 1150 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 1151 continue; 1152 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 1153 continue; 1154 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1155 continue; 1156 if ((IN6_IS_ADDR_V4MAPPED(laddr6) || 1157 IN6_IS_ADDR_V4MAPPED(faddr6)) && 1158 (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) 1159 continue; 1160 return in6p; 1161 } 1162 if (vp && table->vestige) { 1163 if ((*table->vestige->lookup6)(faddr6, fport_arg, 1164 laddr6, lport_arg, vp)) 1165 return NULL; 1166 } 1167 1168 return NULL; 1169 } 1170 1171 struct in6pcb * 1172 in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6, 1173 u_int lport_arg, int faith) 1174 { 1175 struct inpcbhead *head; 1176 struct inpcb_hdr *inph; 1177 struct in6pcb *in6p; 1178 u_int16_t lport = lport_arg; 1179 #ifdef INET 1180 struct in6_addr zero_mapped; 1181 #endif 1182 1183 head = IN6PCBHASH_BIND(table, laddr6, lport); 1184 LIST_FOREACH(inph, head, inph_hash) { 1185 in6p = (struct in6pcb *)inph; 1186 if (in6p->in6p_af != AF_INET6) 1187 continue; 1188 1189 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1190 continue; 1191 if (in6p->in6p_fport != 0) 1192 continue; 1193 if (in6p->in6p_lport != lport) 1194 continue; 1195 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1196 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1197 continue; 1198 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1199 goto out; 1200 } 1201 #ifdef INET 1202 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1203 memset(&zero_mapped, 0, sizeof(zero_mapped)); 1204 zero_mapped.s6_addr16[5] = 0xffff; 1205 head = IN6PCBHASH_BIND(table, &zero_mapped, lport); 1206 LIST_FOREACH(inph, head, inph_hash) { 1207 in6p = (struct in6pcb *)inph; 1208 if (in6p->in6p_af != AF_INET6) 1209 continue; 1210 1211 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1212 continue; 1213 if (in6p->in6p_fport != 0) 1214 continue; 1215 if (in6p->in6p_lport != lport) 1216 continue; 1217 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1218 continue; 1219 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped)) 1220 goto out; 1221 } 1222 } 1223 #endif 1224 head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport); 1225 LIST_FOREACH(inph, head, inph_hash) { 1226 in6p = (struct in6pcb *)inph; 1227 if (in6p->in6p_af != AF_INET6) 1228 continue; 1229 1230 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1231 continue; 1232 if (in6p->in6p_fport != 0) 1233 continue; 1234 if (in6p->in6p_lport != lport) 1235 continue; 1236 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1237 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1238 continue; 1239 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr)) 1240 goto out; 1241 } 1242 return (NULL); 1243 1244 out: 1245 inph = &in6p->in6p_head; 1246 if (inph != LIST_FIRST(head)) { 1247 LIST_REMOVE(inph, inph_hash); 1248 LIST_INSERT_HEAD(head, inph, inph_hash); 1249 } 1250 return in6p; 1251 } 1252 1253 void 1254 in6_pcbstate(struct in6pcb *in6p, int state) 1255 { 1256 1257 if (in6p->in6p_af != AF_INET6) 1258 return; 1259 1260 if (in6p->in6p_state > IN6P_ATTACHED) 1261 LIST_REMOVE(&in6p->in6p_head, inph_hash); 1262 1263 switch (state) { 1264 case IN6P_BOUND: 1265 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table, 1266 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1267 inph_hash); 1268 break; 1269 case IN6P_CONNECTED: 1270 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table, 1271 &in6p->in6p_faddr, in6p->in6p_fport, 1272 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1273 inph_hash); 1274 break; 1275 } 1276 1277 in6p->in6p_state = state; 1278 } 1279