in6_pcb.c revision 1.124
1 /* $NetBSD: in6_pcb.c,v 1.124 2013/11/23 14:20:22 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 1.124 2013/11/23 14:20:22 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/portalgo.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 IPSEC 103 #include <netipsec/ipsec.h> 104 #include <netipsec/ipsec6.h> 105 #include <netipsec/key.h> 106 #endif /* IPSEC */ 107 108 #include <netinet/tcp_vtw.h> 109 110 const struct in6_addr zeroin6_addr; 111 112 #define IN6PCBHASH_PORT(table, lport) \ 113 &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash] 114 #define IN6PCBHASH_BIND(table, laddr, lport) \ 115 &(table)->inpt_bindhashtbl[ \ 116 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ 117 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + ntohs(lport)) & \ 118 (table)->inpt_bindhash] 119 #define IN6PCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 120 &(table)->inpt_bindhashtbl[ \ 121 ((((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \ 122 (faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3]) + ntohs(fport)) + \ 123 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ 124 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + \ 125 ntohs(lport))) & (table)->inpt_bindhash] 126 127 int ip6_anonportmin = IPV6PORT_ANONMIN; 128 int ip6_anonportmax = IPV6PORT_ANONMAX; 129 int ip6_lowportmin = IPV6PORT_RESERVEDMIN; 130 int ip6_lowportmax = IPV6PORT_RESERVEDMAX; 131 132 static struct pool in6pcb_pool; 133 134 static int 135 in6pcb_poolinit(void) 136 { 137 138 pool_init(&in6pcb_pool, sizeof(struct in6pcb), 0, 0, 0, "in6pcbpl", 139 NULL, IPL_SOFTNET); 140 return 0; 141 } 142 143 void 144 in6_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize) 145 { 146 static ONCE_DECL(control); 147 148 in_pcbinit(table, bindhashsize, connecthashsize); 149 table->inpt_lastport = (u_int16_t)ip6_anonportmax; 150 151 RUN_ONCE(&control, in6pcb_poolinit); 152 } 153 154 int 155 in6_pcballoc(struct socket *so, void *v) 156 { 157 struct inpcbtable *table = v; 158 struct in6pcb *in6p; 159 int s; 160 #if defined(IPSEC) 161 int error; 162 #endif 163 164 s = splnet(); 165 in6p = pool_get(&in6pcb_pool, PR_NOWAIT); 166 splx(s); 167 if (in6p == NULL) 168 return (ENOBUFS); 169 memset((void *)in6p, 0, sizeof(*in6p)); 170 in6p->in6p_af = AF_INET6; 171 in6p->in6p_table = table; 172 in6p->in6p_socket = so; 173 in6p->in6p_hops = -1; /* use kernel default */ 174 in6p->in6p_icmp6filt = NULL; 175 in6p->in6p_portalgo = PORTALGO_DEFAULT; 176 in6p->in6p_bindportonsend = false; 177 #if defined(IPSEC) 178 error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp); 179 if (error != 0) { 180 s = splnet(); 181 pool_put(&in6pcb_pool, in6p); 182 splx(s); 183 return error; 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 (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 234 return EADDRNOTAVAIL; 235 } 236 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 237 struct ifaddr *ia = NULL; 238 239 if ((in6p->in6p_flags & IN6P_FAITH) == 0 && 240 (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 241 return (EADDRNOTAVAIL); 242 243 /* 244 * bind to an anycast address might accidentally 245 * cause sending a packet with an anycast source 246 * address, so we forbid it. 247 * 248 * We should allow to bind to a deprecated address, 249 * since the application dare to use it. 250 * But, can we assume that they are careful enough 251 * to check if the address is deprecated or not? 252 * Maybe, as a safeguard, we should have a setsockopt 253 * flag to control the bind(2) behavior against 254 * deprecated addresses (default: forbid bind(2)). 255 */ 256 if (ia && 257 ((struct in6_ifaddr *)ia)->ia6_flags & 258 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) 259 return (EADDRNOTAVAIL); 260 } 261 262 263 in6p->in6p_laddr = sin6->sin6_addr; 264 265 266 return (0); 267 } 268 269 /* 270 * Bind port from sin6 to in6p. 271 */ 272 static int 273 in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 274 { 275 struct inpcbtable *table = in6p->in6p_table; 276 struct socket *so = in6p->in6p_socket; 277 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 278 int error; 279 280 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 281 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 282 (so->so_options & SO_ACCEPTCONN) == 0)) 283 wild = 1; 284 285 if (sin6->sin6_port != 0) { 286 enum kauth_network_req req; 287 288 #ifndef IPNOPRIVPORTS 289 if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED) 290 req = KAUTH_REQ_NETWORK_BIND_PRIVPORT; 291 else 292 #endif /* IPNOPRIVPORTS */ 293 req = KAUTH_REQ_NETWORK_BIND_PORT; 294 295 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND, 296 req, so, sin6, NULL); 297 if (error) 298 return (EACCES); 299 } 300 301 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 302 /* 303 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 304 * allow compepte duplication of binding if 305 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 306 * and a multicast address is bound on both 307 * new and duplicated sockets. 308 */ 309 if (so->so_options & SO_REUSEADDR) 310 reuseport = SO_REUSEADDR|SO_REUSEPORT; 311 } 312 313 if (sin6->sin6_port != 0) { 314 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 315 #ifdef INET 316 struct inpcb *t; 317 struct vestigial_inpcb vestige; 318 319 t = in_pcblookup_port(table, 320 *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 321 sin6->sin6_port, wild, &vestige); 322 if (t && (reuseport & t->inp_socket->so_options) == 0) 323 return (EADDRINUSE); 324 if (!t 325 && vestige.valid 326 && !(reuseport && vestige.reuse_port)) 327 return EADDRINUSE; 328 #else 329 return (EADDRNOTAVAIL); 330 #endif 331 } 332 333 { 334 struct in6pcb *t; 335 struct vestigial_inpcb vestige; 336 337 t = in6_pcblookup_port(table, &sin6->sin6_addr, 338 sin6->sin6_port, wild, &vestige); 339 if (t && (reuseport & t->in6p_socket->so_options) == 0) 340 return (EADDRINUSE); 341 if (!t 342 && vestige.valid 343 && !(reuseport && vestige.reuse_port)) 344 return EADDRINUSE; 345 } 346 } 347 348 if (sin6->sin6_port == 0) { 349 int e; 350 e = in6_pcbsetport(sin6, in6p, l); 351 if (e != 0) 352 return (e); 353 } else { 354 in6p->in6p_lport = sin6->sin6_port; 355 in6_pcbstate(in6p, IN6P_BOUND); 356 } 357 358 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 359 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 360 &in6p->in6p_head, inph_lhash); 361 362 return (0); 363 } 364 365 int 366 in6_pcbbind(void *v, struct mbuf *nam, struct lwp *l) 367 { 368 struct in6pcb *in6p = v; 369 struct sockaddr_in6 lsin6; 370 struct sockaddr_in6 *sin6 = NULL; 371 int error; 372 373 if (in6p->in6p_af != AF_INET6) 374 return (EINVAL); 375 376 /* 377 * If we already have a local port or a local address it means we're 378 * bounded. 379 */ 380 if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 381 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 382 in6p->in6p_laddr.s6_addr32[3] == 0))) 383 return (EINVAL); 384 385 if (nam != NULL) { 386 /* We were provided a sockaddr_in6 to use. */ 387 sin6 = mtod(nam, struct sockaddr_in6 *); 388 if (nam->m_len != sizeof(*sin6)) 389 return (EINVAL); 390 } else { 391 /* We always bind to *something*, even if it's "anything". */ 392 lsin6 = *((const struct sockaddr_in6 *) 393 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 394 sin6 = &lsin6; 395 } 396 397 /* Bind address. */ 398 error = in6_pcbbind_addr(in6p, sin6, l); 399 if (error) 400 return (error); 401 402 /* Bind port. */ 403 error = in6_pcbbind_port(in6p, sin6, l); 404 if (error) { 405 /* 406 * Reset the address here to "any" so we don't "leak" the 407 * in6pcb. 408 */ 409 in6p->in6p_laddr = in6addr_any; 410 411 return (error); 412 } 413 414 415 #if 0 416 in6p->in6p_flowinfo = 0; /* XXX */ 417 #endif 418 return (0); 419 } 420 421 /* 422 * Connect from a socket to a specified address. 423 * Both address and port must be specified in argument sin6. 424 * If don't have a local address for this socket yet, 425 * then pick one. 426 */ 427 int 428 in6_pcbconnect(void *v, struct mbuf *nam, struct lwp *l) 429 { 430 struct rtentry *rt; 431 struct in6pcb *in6p = v; 432 struct in6_addr *in6a = NULL; 433 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 434 struct ifnet *ifp = NULL; /* outgoing interface */ 435 int error = 0; 436 int scope_ambiguous = 0; 437 #ifdef INET 438 struct in6_addr mapped; 439 #endif 440 struct sockaddr_in6 tmp; 441 struct vestigial_inpcb vestige; 442 443 (void)&in6a; /* XXX fool gcc */ 444 445 if (in6p->in6p_af != AF_INET6) 446 return (EINVAL); 447 448 if (nam->m_len != sizeof(*sin6)) 449 return (EINVAL); 450 if (sin6->sin6_family != AF_INET6) 451 return (EAFNOSUPPORT); 452 if (sin6->sin6_port == 0) 453 return (EADDRNOTAVAIL); 454 455 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 456 in6p->in6p_socket->so_type == SOCK_STREAM) 457 return EADDRNOTAVAIL; 458 459 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) 460 scope_ambiguous = 1; 461 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 462 return(error); 463 464 /* sanity check for mapped address case */ 465 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 466 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 467 return EINVAL; 468 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 469 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 470 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 471 return EINVAL; 472 } else 473 { 474 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 475 return EINVAL; 476 } 477 478 /* protect *sin6 from overwrites */ 479 tmp = *sin6; 480 sin6 = &tmp; 481 482 /* Source address selection. */ 483 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 484 in6p->in6p_laddr.s6_addr32[3] == 0) { 485 #ifdef INET 486 struct sockaddr_in sin, *sinp; 487 488 memset(&sin, 0, sizeof(sin)); 489 sin.sin_len = sizeof(sin); 490 sin.sin_family = AF_INET; 491 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3], 492 sizeof(sin.sin_addr)); 493 sinp = in_selectsrc(&sin, &in6p->in6p_route, 494 in6p->in6p_socket->so_options, NULL, &error); 495 if (sinp == 0) { 496 if (error == 0) 497 error = EADDRNOTAVAIL; 498 return (error); 499 } 500 memset(&mapped, 0, sizeof(mapped)); 501 mapped.s6_addr16[5] = htons(0xffff); 502 memcpy(&mapped.s6_addr32[3], &sinp->sin_addr, sizeof(sinp->sin_addr)); 503 in6a = &mapped; 504 #else 505 return EADDRNOTAVAIL; 506 #endif 507 } else { 508 /* 509 * XXX: in6_selectsrc might replace the bound local address 510 * with the address specified by setsockopt(IPV6_PKTINFO). 511 * Is it the intended behavior? 512 */ 513 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 514 in6p->in6p_moptions, 515 &in6p->in6p_route, 516 &in6p->in6p_laddr, &ifp, &error); 517 if (ifp && scope_ambiguous && 518 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 519 return(error); 520 } 521 522 if (in6a == 0) { 523 if (error == 0) 524 error = EADDRNOTAVAIL; 525 return (error); 526 } 527 } 528 if (ifp == NULL && (rt = rtcache_validate(&in6p->in6p_route)) != NULL) 529 ifp = rt->rt_ifp; 530 531 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 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 (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 ipsec_pcbdisconn(in6p->in6p_sp); 585 #endif 586 if (in6p->in6p_socket->so_state & SS_NOFDREF) 587 in6_pcbdetach(in6p); 588 } 589 590 void 591 in6_pcbdetach(struct in6pcb *in6p) 592 { 593 struct socket *so = in6p->in6p_socket; 594 int s; 595 596 if (in6p->in6p_af != AF_INET6) 597 return; 598 599 #if defined(IPSEC) 600 ipsec6_delete_pcbpolicy(in6p); 601 #endif /* IPSEC */ 602 so->so_pcb = 0; 603 if (in6p->in6p_options) 604 m_freem(in6p->in6p_options); 605 if (in6p->in6p_outputopts != NULL) { 606 ip6_clearpktopts(in6p->in6p_outputopts, -1); 607 free(in6p->in6p_outputopts, M_IP6OPT); 608 } 609 rtcache_free(&in6p->in6p_route); 610 ip6_freemoptions(in6p->in6p_moptions); 611 s = splnet(); 612 in6_pcbstate(in6p, IN6P_ATTACHED); 613 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 614 TAILQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head, 615 inph_queue); 616 pool_put(&in6pcb_pool, in6p); 617 splx(s); 618 sofree(so); /* drops the socket's lock */ 619 mutex_enter(softnet_lock); /* reacquire it */ 620 } 621 622 void 623 in6_setsockaddr(struct in6pcb *in6p, struct mbuf *nam) 624 { 625 struct sockaddr_in6 *sin6; 626 627 if (in6p->in6p_af != AF_INET6) 628 return; 629 630 nam->m_len = sizeof(*sin6); 631 sin6 = mtod(nam, struct sockaddr_in6 *); 632 sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0); 633 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 634 } 635 636 void 637 in6_setpeeraddr(struct in6pcb *in6p, struct mbuf *nam) 638 { 639 struct sockaddr_in6 *sin6; 640 641 if (in6p->in6p_af != AF_INET6) 642 return; 643 644 nam->m_len = sizeof(*sin6); 645 sin6 = mtod(nam, struct sockaddr_in6 *); 646 sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0); 647 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 648 } 649 650 /* 651 * Pass some notification to all connections of a protocol 652 * associated with address dst. The local address and/or port numbers 653 * may be specified to limit the search. The "usual action" will be 654 * taken, depending on the ctlinput cmd. The caller must filter any 655 * cmds that are uninteresting (e.g., no error in the map). 656 * Call the protocol specific routine (if any) to report 657 * any errors for each matching socket. 658 * 659 * Must be called at splsoftnet. 660 * 661 * Note: src (4th arg) carries the flowlabel value on the original IPv6 662 * header, in sin6_flowinfo member. 663 */ 664 int 665 in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst, 666 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd, 667 void *cmdarg, void (*notify)(struct in6pcb *, int)) 668 { 669 struct rtentry *rt; 670 struct inpcb_hdr *inph, *ninph; 671 struct sockaddr_in6 sa6_src; 672 const struct sockaddr_in6 *sa6_dst; 673 u_int16_t fport = fport_arg, lport = lport_arg; 674 int errno; 675 int nmatch = 0; 676 u_int32_t flowinfo; 677 678 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 679 return 0; 680 681 sa6_dst = (const struct sockaddr_in6 *)dst; 682 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 683 return 0; 684 685 /* 686 * note that src can be NULL when we get notify by local fragmentation. 687 */ 688 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 689 flowinfo = sa6_src.sin6_flowinfo; 690 691 /* 692 * Redirects go to all references to the destination, 693 * and use in6_rtchange to invalidate the route cache. 694 * Dead host indications: also use in6_rtchange to invalidate 695 * the cache, and deliver the error to all the sockets. 696 * Otherwise, if we have knowledge of the local port and address, 697 * deliver only to that socket. 698 */ 699 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 700 fport = 0; 701 lport = 0; 702 memset((void *)&sa6_src.sin6_addr, 0, sizeof(sa6_src.sin6_addr)); 703 704 if (cmd != PRC_HOSTDEAD) 705 notify = in6_rtchange; 706 } 707 708 errno = inet6ctlerrmap[cmd]; 709 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 710 struct in6pcb *in6p = (struct in6pcb *)inph; 711 if (in6p->in6p_af != AF_INET6) 712 continue; 713 714 /* 715 * Under the following condition, notify of redirects 716 * to the pcb, without making address matches against inpcb. 717 * - redirect notification is arrived. 718 * - the inpcb is unconnected. 719 * - the inpcb is caching !RTF_HOST routing entry. 720 * - the ICMPv6 notification is from the gateway cached in the 721 * inpcb. i.e. ICMPv6 notification is from nexthop gateway 722 * the inpcb used very recently. 723 * 724 * This is to improve interaction between netbsd/openbsd 725 * redirect handling code, and inpcb route cache code. 726 * without the clause, !RTF_HOST routing entry (which carries 727 * gateway used by inpcb right before the ICMPv6 redirect) 728 * will be cached forever in unconnected inpcb. 729 * 730 * There still is a question regarding to what is TRT: 731 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be 732 * generated on packet output. inpcb will always cache 733 * RTF_HOST routing entry so there's no need for the clause 734 * (ICMPv6 redirect will update RTF_HOST routing entry, 735 * and inpcb is caching it already). 736 * However, bsdi/freebsd are vulnerable to local DoS attacks 737 * due to the cloned routing entries. 738 * - Specwise, "destination cache" is mentioned in RFC2461. 739 * Jinmei says that it implies bsdi/freebsd behavior, itojun 740 * is not really convinced. 741 * - Having hiwat/lowat on # of cloned host route (redirect/ 742 * pmtud) may be a good idea. netbsd/openbsd has it. see 743 * icmp6_mtudisc_update(). 744 */ 745 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && 746 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 747 (rt = rtcache_validate(&in6p->in6p_route)) != NULL && 748 !(rt->rt_flags & RTF_HOST)) { 749 const struct sockaddr_in6 *dst6; 750 751 dst6 = (const struct sockaddr_in6 *) 752 rtcache_getdst(&in6p->in6p_route); 753 if (dst6 == NULL) 754 ; 755 else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, 756 &sa6_dst->sin6_addr)) 757 goto do_notify; 758 } 759 760 /* 761 * If the error designates a new path MTU for a destination 762 * and the application (associated with this socket) wanted to 763 * know the value, notify. Note that we notify for all 764 * disconnected sockets if the corresponding application 765 * wanted. This is because some UDP applications keep sending 766 * sockets disconnected. 767 * XXX: should we avoid to notify the value to TCP sockets? 768 */ 769 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 && 770 (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) || 771 IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) { 772 ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst, 773 (u_int32_t *)cmdarg); 774 } 775 776 /* 777 * Detect if we should notify the error. If no source and 778 * destination ports are specified, but non-zero flowinfo and 779 * local address match, notify the error. This is the case 780 * when the error is delivered with an encrypted buffer 781 * by ESP. Otherwise, just compare addresses and ports 782 * as usual. 783 */ 784 if (lport == 0 && fport == 0 && flowinfo && 785 in6p->in6p_socket != NULL && 786 flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 787 IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr)) 788 goto do_notify; 789 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 790 &sa6_dst->sin6_addr) || 791 in6p->in6p_socket == 0 || 792 (lport && in6p->in6p_lport != lport) || 793 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 794 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 795 &sa6_src.sin6_addr)) || 796 (fport && in6p->in6p_fport != fport)) 797 continue; 798 799 do_notify: 800 if (notify) 801 (*notify)(in6p, errno); 802 nmatch++; 803 } 804 return nmatch; 805 } 806 807 void 808 in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) 809 { 810 struct inpcb_hdr *inph, *ninph; 811 struct ip6_moptions *im6o; 812 struct in6_multi_mship *imm, *nimm; 813 814 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 815 struct in6pcb *in6p = (struct in6pcb *)inph; 816 if (in6p->in6p_af != AF_INET6) 817 continue; 818 819 im6o = in6p->in6p_moptions; 820 if (im6o) { 821 /* 822 * Unselect the outgoing interface if it is being 823 * detached. 824 */ 825 if (im6o->im6o_multicast_ifp == ifp) 826 im6o->im6o_multicast_ifp = NULL; 827 828 /* 829 * Drop multicast group membership if we joined 830 * through the interface being detached. 831 * XXX controversial - is it really legal for kernel 832 * to force this? 833 */ 834 for (imm = im6o->im6o_memberships.lh_first; 835 imm != NULL; imm = nimm) { 836 nimm = imm->i6mm_chain.le_next; 837 if (imm->i6mm_maddr->in6m_ifp == ifp) { 838 LIST_REMOVE(imm, i6mm_chain); 839 in6_leavegroup(imm); 840 } 841 } 842 } 843 } 844 } 845 846 void 847 in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) 848 { 849 struct rtentry *rt; 850 struct inpcb_hdr *inph, *ninph; 851 852 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 853 struct in6pcb *in6p = (struct in6pcb *)inph; 854 if (in6p->in6p_af != AF_INET6) 855 continue; 856 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL && 857 rt->rt_ifp == ifp) 858 in6_rtchange(in6p, 0); 859 } 860 } 861 862 /* 863 * Check for alternatives when higher level complains 864 * about service problems. For now, invalidate cached 865 * routing information. If the route was created dynamically 866 * (by a redirect), time to try a default gateway again. 867 */ 868 void 869 in6_losing(struct in6pcb *in6p) 870 { 871 struct rtentry *rt; 872 struct rt_addrinfo info; 873 874 if (in6p->in6p_af != AF_INET6) 875 return; 876 877 if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL) 878 return; 879 880 memset(&info, 0, sizeof(info)); 881 info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route); 882 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 883 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 884 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 885 if (rt->rt_flags & RTF_DYNAMIC) { 886 (void)rtrequest(RTM_DELETE, rt_getkey(rt), 887 rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL); 888 } 889 /* 890 * A new route can be allocated 891 * the next time output is attempted. 892 */ 893 rtcache_free(&in6p->in6p_route); 894 } 895 896 /* 897 * After a routing change, flush old routing. A new route can be 898 * allocated the next time output is attempted. 899 */ 900 void 901 in6_rtchange(struct in6pcb *in6p, int errno) 902 { 903 if (in6p->in6p_af != AF_INET6) 904 return; 905 906 rtcache_free(&in6p->in6p_route); 907 /* 908 * A new route can be allocated the next time 909 * output is attempted. 910 */ 911 } 912 913 struct in6pcb * 914 in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6, 915 u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp) 916 { 917 struct inpcbhead *head; 918 struct inpcb_hdr *inph; 919 struct in6pcb *in6p, *match = 0; 920 int matchwild = 3, wildcard; 921 u_int16_t lport = lport_arg; 922 923 if (vp) 924 vp->valid = 0; 925 926 head = IN6PCBHASH_PORT(table, lport); 927 LIST_FOREACH(inph, head, inph_lhash) { 928 in6p = (struct in6pcb *)inph; 929 if (in6p->in6p_af != AF_INET6) 930 continue; 931 932 if (in6p->in6p_lport != lport) 933 continue; 934 wildcard = 0; 935 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 936 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 937 continue; 938 } 939 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 940 wildcard++; 941 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 942 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 943 continue; 944 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 945 continue; 946 947 /* duplicate of IPv4 logic */ 948 wildcard = 0; 949 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) && 950 in6p->in6p_faddr.s6_addr32[3]) 951 wildcard++; 952 if (!in6p->in6p_laddr.s6_addr32[3]) { 953 if (laddr6->s6_addr32[3]) 954 wildcard++; 955 } else { 956 if (!laddr6->s6_addr32[3]) 957 wildcard++; 958 else { 959 if (in6p->in6p_laddr.s6_addr32[3] != 960 laddr6->s6_addr32[3]) 961 continue; 962 } 963 } 964 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 965 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 966 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 967 continue; 968 } 969 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 970 wildcard++; 971 } else { 972 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 973 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 974 continue; 975 } 976 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 977 wildcard++; 978 else { 979 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 980 laddr6)) 981 continue; 982 } 983 } 984 if (wildcard && !lookup_wildcard) 985 continue; 986 if (wildcard < matchwild) { 987 match = in6p; 988 matchwild = wildcard; 989 if (matchwild == 0) 990 break; 991 } 992 } 993 if (match && matchwild == 0) 994 return match; 995 996 if (vp && table->vestige && table->vestige->init_ports6) { 997 struct vestigial_inpcb better; 998 void *state; 999 1000 state = (*table->vestige->init_ports6)(laddr6, 1001 lport_arg, 1002 lookup_wildcard); 1003 while (table->vestige 1004 && (*table->vestige->next_port6)(state, vp)) { 1005 1006 if (vp->lport != lport) 1007 continue; 1008 wildcard = 0; 1009 if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6)) 1010 wildcard++; 1011 if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) { 1012 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1013 wildcard++; 1014 } else { 1015 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1016 if (vp->v6only) 1017 continue; 1018 } 1019 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1020 wildcard++; 1021 else { 1022 if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6)) 1023 continue; 1024 } 1025 } 1026 if (wildcard && !lookup_wildcard) 1027 continue; 1028 if (wildcard < matchwild) { 1029 better = *vp; 1030 match = (void*)&better; 1031 1032 matchwild = wildcard; 1033 if (matchwild == 0) 1034 break; 1035 } 1036 } 1037 1038 if (match) { 1039 if (match != (void*)&better) 1040 return match; 1041 else { 1042 *vp = better; 1043 return 0; 1044 } 1045 } 1046 } 1047 return (match); 1048 } 1049 1050 /* 1051 * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to 1052 * IPv4 mapped address. 1053 */ 1054 struct rtentry * 1055 in6_pcbrtentry(struct in6pcb *in6p) 1056 { 1057 struct rtentry *rt; 1058 struct route *ro; 1059 union { 1060 const struct sockaddr *sa; 1061 const struct sockaddr_in6 *sa6; 1062 #ifdef INET 1063 const struct sockaddr_in *sa4; 1064 #endif 1065 } cdst; 1066 1067 ro = &in6p->in6p_route; 1068 1069 if (in6p->in6p_af != AF_INET6) 1070 return (NULL); 1071 1072 cdst.sa = rtcache_getdst(ro); 1073 if (cdst.sa == NULL) 1074 ; 1075 #ifdef INET 1076 else if (cdst.sa->sa_family == AF_INET) { 1077 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)); 1078 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3]) 1079 rtcache_free(ro); 1080 } 1081 #endif 1082 else { 1083 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr, 1084 &in6p->in6p_faddr)) 1085 rtcache_free(ro); 1086 } 1087 if ((rt = rtcache_validate(ro)) == NULL) 1088 rt = rtcache_update(ro, 1); 1089 #ifdef INET 1090 if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 1091 union { 1092 struct sockaddr dst; 1093 struct sockaddr_in dst4; 1094 } u; 1095 struct in_addr addr; 1096 1097 addr.s_addr = in6p->in6p_faddr.s6_addr32[3]; 1098 1099 sockaddr_in_init(&u.dst4, &addr, 0); 1100 rtcache_setdst(ro, &u.dst); 1101 1102 rt = rtcache_init(ro); 1103 } else 1104 #endif 1105 if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 1106 union { 1107 struct sockaddr dst; 1108 struct sockaddr_in6 dst6; 1109 } u; 1110 1111 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0); 1112 rtcache_setdst(ro, &u.dst); 1113 1114 rt = rtcache_init(ro); 1115 } 1116 return rt; 1117 } 1118 1119 struct in6pcb * 1120 in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6, 1121 u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg, 1122 int faith, 1123 struct vestigial_inpcb *vp) 1124 { 1125 struct inpcbhead *head; 1126 struct inpcb_hdr *inph; 1127 struct in6pcb *in6p; 1128 u_int16_t fport = fport_arg, lport = lport_arg; 1129 1130 if (vp) 1131 vp->valid = 0; 1132 1133 head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport); 1134 LIST_FOREACH(inph, head, inph_hash) { 1135 in6p = (struct in6pcb *)inph; 1136 if (in6p->in6p_af != AF_INET6) 1137 continue; 1138 1139 /* find exact match on both source and dest */ 1140 if (in6p->in6p_fport != fport) 1141 continue; 1142 if (in6p->in6p_lport != lport) 1143 continue; 1144 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 1145 continue; 1146 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 1147 continue; 1148 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 1149 continue; 1150 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1151 continue; 1152 if ((IN6_IS_ADDR_V4MAPPED(laddr6) || 1153 IN6_IS_ADDR_V4MAPPED(faddr6)) && 1154 (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) 1155 continue; 1156 return in6p; 1157 } 1158 if (vp && table->vestige) { 1159 if ((*table->vestige->lookup6)(faddr6, fport_arg, 1160 laddr6, lport_arg, vp)) 1161 return 0; 1162 } 1163 1164 return NULL; 1165 } 1166 1167 struct in6pcb * 1168 in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6, 1169 u_int lport_arg, int faith) 1170 { 1171 struct inpcbhead *head; 1172 struct inpcb_hdr *inph; 1173 struct in6pcb *in6p; 1174 u_int16_t lport = lport_arg; 1175 #ifdef INET 1176 struct in6_addr zero_mapped; 1177 #endif 1178 1179 head = IN6PCBHASH_BIND(table, laddr6, lport); 1180 LIST_FOREACH(inph, head, inph_hash) { 1181 in6p = (struct in6pcb *)inph; 1182 if (in6p->in6p_af != AF_INET6) 1183 continue; 1184 1185 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1186 continue; 1187 if (in6p->in6p_fport != 0) 1188 continue; 1189 if (in6p->in6p_lport != lport) 1190 continue; 1191 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1192 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1193 continue; 1194 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1195 goto out; 1196 } 1197 #ifdef INET 1198 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1199 memset(&zero_mapped, 0, sizeof(zero_mapped)); 1200 zero_mapped.s6_addr16[5] = 0xffff; 1201 head = IN6PCBHASH_BIND(table, &zero_mapped, lport); 1202 LIST_FOREACH(inph, head, inph_hash) { 1203 in6p = (struct in6pcb *)inph; 1204 if (in6p->in6p_af != AF_INET6) 1205 continue; 1206 1207 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1208 continue; 1209 if (in6p->in6p_fport != 0) 1210 continue; 1211 if (in6p->in6p_lport != lport) 1212 continue; 1213 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1214 continue; 1215 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped)) 1216 goto out; 1217 } 1218 } 1219 #endif 1220 head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport); 1221 LIST_FOREACH(inph, head, inph_hash) { 1222 in6p = (struct in6pcb *)inph; 1223 if (in6p->in6p_af != AF_INET6) 1224 continue; 1225 1226 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1227 continue; 1228 if (in6p->in6p_fport != 0) 1229 continue; 1230 if (in6p->in6p_lport != lport) 1231 continue; 1232 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1233 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1234 continue; 1235 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr)) 1236 goto out; 1237 } 1238 return (NULL); 1239 1240 out: 1241 inph = &in6p->in6p_head; 1242 if (inph != LIST_FIRST(head)) { 1243 LIST_REMOVE(inph, inph_hash); 1244 LIST_INSERT_HEAD(head, inph, inph_hash); 1245 } 1246 return in6p; 1247 } 1248 1249 void 1250 in6_pcbstate(struct in6pcb *in6p, int state) 1251 { 1252 1253 if (in6p->in6p_af != AF_INET6) 1254 return; 1255 1256 if (in6p->in6p_state > IN6P_ATTACHED) 1257 LIST_REMOVE(&in6p->in6p_head, inph_hash); 1258 1259 switch (state) { 1260 case IN6P_BOUND: 1261 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table, 1262 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1263 inph_hash); 1264 break; 1265 case IN6P_CONNECTED: 1266 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table, 1267 &in6p->in6p_faddr, in6p->in6p_fport, 1268 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1269 inph_hash); 1270 break; 1271 } 1272 1273 in6p->in6p_state = state; 1274 } 1275
Indexes created Tue Sep 23 02:09:52 GMT 2025