in6_pcb.c revision 1.121.2.2
1 /* $NetBSD: in6_pcb.c,v 1.121.2.2 2014/08/20 00:04:36 tls 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 1.121.2.2 2014/08/20 00:04:36 tls 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; 160 161 s = splnet(); 162 in6p = pool_get(&in6pcb_pool, PR_NOWAIT); 163 splx(s); 164 if (in6p == NULL) 165 return (ENOBUFS); 166 memset((void *)in6p, 0, sizeof(*in6p)); 167 in6p->in6p_af = AF_INET6; 168 in6p->in6p_table = table; 169 in6p->in6p_socket = so; 170 in6p->in6p_hops = -1; /* use kernel default */ 171 in6p->in6p_icmp6filt = NULL; 172 in6p->in6p_portalgo = PORTALGO_DEFAULT; 173 in6p->in6p_bindportonsend = false; 174 #if defined(IPSEC) 175 if (ipsec_enabled) { 176 int error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp); 177 if (error != 0) { 178 s = splnet(); 179 pool_put(&in6pcb_pool, in6p); 180 splx(s); 181 return error; 182 } 183 } 184 #endif /* IPSEC */ 185 s = splnet(); 186 TAILQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p, 187 inph_queue); 188 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 189 &in6p->in6p_head, inph_lhash); 190 in6_pcbstate(in6p, IN6P_ATTACHED); 191 splx(s); 192 if (ip6_v6only) 193 in6p->in6p_flags |= IN6P_IPV6_V6ONLY; 194 so->so_pcb = (void *)in6p; 195 return (0); 196 } 197 198 /* 199 * Bind address from sin6 to in6p. 200 */ 201 static int 202 in6_pcbbind_addr(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 203 { 204 int error; 205 206 /* 207 * We should check the family, but old programs 208 * incorrectly fail to intialize it. 209 */ 210 if (sin6->sin6_family != AF_INET6) 211 return (EAFNOSUPPORT); 212 213 #ifndef INET 214 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 215 return (EADDRNOTAVAIL); 216 #endif 217 218 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 219 return (error); 220 221 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 222 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 223 return (EINVAL); 224 if (sin6->sin6_addr.s6_addr32[3]) { 225 struct sockaddr_in sin; 226 227 memset(&sin, 0, sizeof(sin)); 228 sin.sin_len = sizeof(sin); 229 sin.sin_family = AF_INET; 230 bcopy(&sin6->sin6_addr.s6_addr32[3], 231 &sin.sin_addr, sizeof(sin.sin_addr)); 232 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 233 return EADDRNOTAVAIL; 234 } 235 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 236 struct ifaddr *ia = NULL; 237 238 if ((in6p->in6p_flags & IN6P_FAITH) == 0 && 239 (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 240 return (EADDRNOTAVAIL); 241 242 /* 243 * bind to an anycast address might accidentally 244 * cause sending a packet with an anycast source 245 * address, so we forbid it. 246 * 247 * We should allow to bind to a deprecated address, 248 * since the application dare to use it. 249 * But, can we assume that they are careful enough 250 * to check if the address is deprecated or not? 251 * Maybe, as a safeguard, we should have a setsockopt 252 * flag to control the bind(2) behavior against 253 * deprecated addresses (default: forbid bind(2)). 254 */ 255 if (ia && 256 ((struct in6_ifaddr *)ia)->ia6_flags & 257 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) 258 return (EADDRNOTAVAIL); 259 } 260 261 262 in6p->in6p_laddr = sin6->sin6_addr; 263 264 265 return (0); 266 } 267 268 /* 269 * Bind port from sin6 to in6p. 270 */ 271 static int 272 in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 273 { 274 struct inpcbtable *table = in6p->in6p_table; 275 struct socket *so = in6p->in6p_socket; 276 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 277 int error; 278 279 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 280 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 281 (so->so_options & SO_ACCEPTCONN) == 0)) 282 wild = 1; 283 284 if (sin6->sin6_port != 0) { 285 enum kauth_network_req req; 286 287 #ifndef IPNOPRIVPORTS 288 if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED) 289 req = KAUTH_REQ_NETWORK_BIND_PRIVPORT; 290 else 291 #endif /* IPNOPRIVPORTS */ 292 req = KAUTH_REQ_NETWORK_BIND_PORT; 293 294 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND, 295 req, so, sin6, NULL); 296 if (error) 297 return (EACCES); 298 } 299 300 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 301 /* 302 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 303 * allow compepte duplication of binding if 304 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 305 * and a multicast address is bound on both 306 * new and duplicated sockets. 307 */ 308 if (so->so_options & SO_REUSEADDR) 309 reuseport = SO_REUSEADDR|SO_REUSEPORT; 310 } 311 312 if (sin6->sin6_port != 0) { 313 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 314 #ifdef INET 315 struct inpcb *t; 316 struct vestigial_inpcb vestige; 317 318 t = in_pcblookup_port(table, 319 *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 320 sin6->sin6_port, wild, &vestige); 321 if (t && (reuseport & t->inp_socket->so_options) == 0) 322 return (EADDRINUSE); 323 if (!t 324 && vestige.valid 325 && !(reuseport && vestige.reuse_port)) 326 return EADDRINUSE; 327 #else 328 return (EADDRNOTAVAIL); 329 #endif 330 } 331 332 { 333 struct in6pcb *t; 334 struct vestigial_inpcb vestige; 335 336 t = in6_pcblookup_port(table, &sin6->sin6_addr, 337 sin6->sin6_port, wild, &vestige); 338 if (t && (reuseport & t->in6p_socket->so_options) == 0) 339 return (EADDRINUSE); 340 if (!t 341 && vestige.valid 342 && !(reuseport && vestige.reuse_port)) 343 return EADDRINUSE; 344 } 345 } 346 347 if (sin6->sin6_port == 0) { 348 int e; 349 e = in6_pcbsetport(sin6, in6p, l); 350 if (e != 0) 351 return (e); 352 } else { 353 in6p->in6p_lport = sin6->sin6_port; 354 in6_pcbstate(in6p, IN6P_BOUND); 355 } 356 357 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 358 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 359 &in6p->in6p_head, inph_lhash); 360 361 return (0); 362 } 363 364 int 365 in6_pcbbind(void *v, struct mbuf *nam, struct lwp *l) 366 { 367 struct in6pcb *in6p = v; 368 struct sockaddr_in6 lsin6; 369 struct sockaddr_in6 *sin6 = NULL; 370 int error; 371 372 if (in6p->in6p_af != AF_INET6) 373 return (EINVAL); 374 375 /* 376 * If we already have a local port or a local address it means we're 377 * bounded. 378 */ 379 if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 380 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 381 in6p->in6p_laddr.s6_addr32[3] == 0))) 382 return (EINVAL); 383 384 if (nam != NULL) { 385 /* We were provided a sockaddr_in6 to use. */ 386 sin6 = mtod(nam, struct sockaddr_in6 *); 387 if (nam->m_len != sizeof(*sin6)) 388 return (EINVAL); 389 } else { 390 /* We always bind to *something*, even if it's "anything". */ 391 lsin6 = *((const struct sockaddr_in6 *) 392 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 393 sin6 = &lsin6; 394 } 395 396 /* Bind address. */ 397 error = in6_pcbbind_addr(in6p, sin6, l); 398 if (error) 399 return (error); 400 401 /* Bind port. */ 402 error = in6_pcbbind_port(in6p, sin6, l); 403 if (error) { 404 /* 405 * Reset the address here to "any" so we don't "leak" the 406 * in6pcb. 407 */ 408 in6p->in6p_laddr = in6addr_any; 409 410 return (error); 411 } 412 413 414 #if 0 415 in6p->in6p_flowinfo = 0; /* XXX */ 416 #endif 417 return (0); 418 } 419 420 /* 421 * Connect from a socket to a specified address. 422 * Both address and port must be specified in argument sin6. 423 * If don't have a local address for this socket yet, 424 * then pick one. 425 */ 426 int 427 in6_pcbconnect(void *v, struct mbuf *nam, struct lwp *l) 428 { 429 struct rtentry *rt; 430 struct in6pcb *in6p = v; 431 struct in6_addr *in6a = NULL; 432 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 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 (nam->m_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 == 0) { 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 == 0) { 522 if (error == 0) 523 error = EADDRNOTAVAIL; 524 return (error); 525 } 526 } 527 if (ifp == NULL && (rt = rtcache_validate(&in6p->in6p_route)) != NULL) 528 ifp = rt->rt_ifp; 529 530 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 531 532 if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr, 533 sin6->sin6_port, 534 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr, 535 in6p->in6p_lport, 0, &vestige) 536 || vestige.valid) 537 return (EADDRINUSE); 538 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 539 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 540 in6p->in6p_laddr.s6_addr32[3] == 0)) 541 { 542 if (in6p->in6p_lport == 0) { 543 error = in6_pcbbind(in6p, NULL, l); 544 if (error != 0) 545 return error; 546 } 547 in6p->in6p_laddr = *in6a; 548 } 549 in6p->in6p_faddr = sin6->sin6_addr; 550 in6p->in6p_fport = sin6->sin6_port; 551 552 /* Late bind, if needed */ 553 if (in6p->in6p_bindportonsend) { 554 struct sockaddr_in6 lsin = *((const struct sockaddr_in6 *) 555 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 556 lsin.sin6_addr = in6p->in6p_laddr; 557 lsin.sin6_port = 0; 558 559 if ((error = in6_pcbbind_port(in6p, &lsin, l)) != 0) 560 return error; 561 } 562 563 in6_pcbstate(in6p, IN6P_CONNECTED); 564 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 565 if (ip6_auto_flowlabel) 566 in6p->in6p_flowinfo |= 567 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 568 #if defined(IPSEC) 569 if (ipsec_enabled && in6p->in6p_socket->so_type == SOCK_STREAM) 570 ipsec_pcbconn(in6p->in6p_sp); 571 #endif 572 return (0); 573 } 574 575 void 576 in6_pcbdisconnect(struct in6pcb *in6p) 577 { 578 memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr)); 579 in6p->in6p_fport = 0; 580 in6_pcbstate(in6p, IN6P_BOUND); 581 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 582 #if defined(IPSEC) 583 if (ipsec_enabled) 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 if (ipsec_enabled) 601 ipsec6_delete_pcbpolicy(in6p); 602 #endif 603 so->so_pcb = NULL; 604 605 s = splnet(); 606 in6_pcbstate(in6p, IN6P_ATTACHED); 607 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 608 TAILQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head, 609 inph_queue); 610 splx(s); 611 612 if (in6p->in6p_options) { 613 m_freem(in6p->in6p_options); 614 } 615 if (in6p->in6p_outputopts != NULL) { 616 ip6_clearpktopts(in6p->in6p_outputopts, -1); 617 free(in6p->in6p_outputopts, M_IP6OPT); 618 } 619 rtcache_free(&in6p->in6p_route); 620 sofree(so); /* drops the socket's lock */ 621 622 ip6_freemoptions(in6p->in6p_moptions); 623 pool_put(&in6pcb_pool, in6p); 624 mutex_enter(softnet_lock); /* reacquire it */ 625 } 626 627 void 628 in6_setsockaddr(struct in6pcb *in6p, struct mbuf *nam) 629 { 630 struct sockaddr_in6 *sin6; 631 632 if (in6p->in6p_af != AF_INET6) 633 return; 634 635 nam->m_len = sizeof(*sin6); 636 sin6 = mtod(nam, struct sockaddr_in6 *); 637 sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0); 638 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 639 } 640 641 void 642 in6_setpeeraddr(struct in6pcb *in6p, struct mbuf *nam) 643 { 644 struct sockaddr_in6 *sin6; 645 646 if (in6p->in6p_af != AF_INET6) 647 return; 648 649 nam->m_len = sizeof(*sin6); 650 sin6 = mtod(nam, struct sockaddr_in6 *); 651 sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0); 652 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 653 } 654 655 /* 656 * Pass some notification to all connections of a protocol 657 * associated with address dst. The local address and/or port numbers 658 * may be specified to limit the search. The "usual action" will be 659 * taken, depending on the ctlinput cmd. The caller must filter any 660 * cmds that are uninteresting (e.g., no error in the map). 661 * Call the protocol specific routine (if any) to report 662 * any errors for each matching socket. 663 * 664 * Must be called at splsoftnet. 665 * 666 * Note: src (4th arg) carries the flowlabel value on the original IPv6 667 * header, in sin6_flowinfo member. 668 */ 669 int 670 in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst, 671 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd, 672 void *cmdarg, void (*notify)(struct in6pcb *, int)) 673 { 674 struct rtentry *rt; 675 struct inpcb_hdr *inph, *ninph; 676 struct sockaddr_in6 sa6_src; 677 const struct sockaddr_in6 *sa6_dst; 678 u_int16_t fport = fport_arg, lport = lport_arg; 679 int errno; 680 int nmatch = 0; 681 u_int32_t flowinfo; 682 683 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 684 return 0; 685 686 sa6_dst = (const struct sockaddr_in6 *)dst; 687 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 688 return 0; 689 690 /* 691 * note that src can be NULL when we get notify by local fragmentation. 692 */ 693 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 694 flowinfo = sa6_src.sin6_flowinfo; 695 696 /* 697 * Redirects go to all references to the destination, 698 * and use in6_rtchange to invalidate the route cache. 699 * Dead host indications: also use in6_rtchange to invalidate 700 * the cache, and deliver the error to all the sockets. 701 * Otherwise, if we have knowledge of the local port and address, 702 * deliver only to that socket. 703 */ 704 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 705 fport = 0; 706 lport = 0; 707 memset((void *)&sa6_src.sin6_addr, 0, sizeof(sa6_src.sin6_addr)); 708 709 if (cmd != PRC_HOSTDEAD) 710 notify = in6_rtchange; 711 } 712 713 errno = inet6ctlerrmap[cmd]; 714 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 715 struct in6pcb *in6p = (struct in6pcb *)inph; 716 if (in6p->in6p_af != AF_INET6) 717 continue; 718 719 /* 720 * Under the following condition, notify of redirects 721 * to the pcb, without making address matches against inpcb. 722 * - redirect notification is arrived. 723 * - the inpcb is unconnected. 724 * - the inpcb is caching !RTF_HOST routing entry. 725 * - the ICMPv6 notification is from the gateway cached in the 726 * inpcb. i.e. ICMPv6 notification is from nexthop gateway 727 * the inpcb used very recently. 728 * 729 * This is to improve interaction between netbsd/openbsd 730 * redirect handling code, and inpcb route cache code. 731 * without the clause, !RTF_HOST routing entry (which carries 732 * gateway used by inpcb right before the ICMPv6 redirect) 733 * will be cached forever in unconnected inpcb. 734 * 735 * There still is a question regarding to what is TRT: 736 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be 737 * generated on packet output. inpcb will always cache 738 * RTF_HOST routing entry so there's no need for the clause 739 * (ICMPv6 redirect will update RTF_HOST routing entry, 740 * and inpcb is caching it already). 741 * However, bsdi/freebsd are vulnerable to local DoS attacks 742 * due to the cloned routing entries. 743 * - Specwise, "destination cache" is mentioned in RFC2461. 744 * Jinmei says that it implies bsdi/freebsd behavior, itojun 745 * is not really convinced. 746 * - Having hiwat/lowat on # of cloned host route (redirect/ 747 * pmtud) may be a good idea. netbsd/openbsd has it. see 748 * icmp6_mtudisc_update(). 749 */ 750 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && 751 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 752 (rt = rtcache_validate(&in6p->in6p_route)) != NULL && 753 !(rt->rt_flags & RTF_HOST)) { 754 const struct sockaddr_in6 *dst6; 755 756 dst6 = (const struct sockaddr_in6 *) 757 rtcache_getdst(&in6p->in6p_route); 758 if (dst6 == NULL) 759 ; 760 else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, 761 &sa6_dst->sin6_addr)) 762 goto do_notify; 763 } 764 765 /* 766 * If the error designates a new path MTU for a destination 767 * and the application (associated with this socket) wanted to 768 * know the value, notify. Note that we notify for all 769 * disconnected sockets if the corresponding application 770 * wanted. This is because some UDP applications keep sending 771 * sockets disconnected. 772 * XXX: should we avoid to notify the value to TCP sockets? 773 */ 774 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 && 775 (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) || 776 IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) { 777 ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst, 778 (u_int32_t *)cmdarg); 779 } 780 781 /* 782 * Detect if we should notify the error. If no source and 783 * destination ports are specified, but non-zero flowinfo and 784 * local address match, notify the error. This is the case 785 * when the error is delivered with an encrypted buffer 786 * by ESP. Otherwise, just compare addresses and ports 787 * as usual. 788 */ 789 if (lport == 0 && fport == 0 && flowinfo && 790 in6p->in6p_socket != NULL && 791 flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 792 IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr)) 793 goto do_notify; 794 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 795 &sa6_dst->sin6_addr) || 796 in6p->in6p_socket == 0 || 797 (lport && in6p->in6p_lport != lport) || 798 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 799 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 800 &sa6_src.sin6_addr)) || 801 (fport && in6p->in6p_fport != fport)) 802 continue; 803 804 do_notify: 805 if (notify) 806 (*notify)(in6p, errno); 807 nmatch++; 808 } 809 return nmatch; 810 } 811 812 void 813 in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) 814 { 815 struct inpcb_hdr *inph, *ninph; 816 struct ip6_moptions *im6o; 817 struct in6_multi_mship *imm, *nimm; 818 819 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 820 struct in6pcb *in6p = (struct in6pcb *)inph; 821 if (in6p->in6p_af != AF_INET6) 822 continue; 823 824 im6o = in6p->in6p_moptions; 825 if (im6o) { 826 /* 827 * Unselect the outgoing interface if it is being 828 * detached. 829 */ 830 if (im6o->im6o_multicast_ifp == ifp) 831 im6o->im6o_multicast_ifp = NULL; 832 833 /* 834 * Drop multicast group membership if we joined 835 * through the interface being detached. 836 * XXX controversial - is it really legal for kernel 837 * to force this? 838 */ 839 for (imm = im6o->im6o_memberships.lh_first; 840 imm != NULL; imm = nimm) { 841 nimm = imm->i6mm_chain.le_next; 842 if (imm->i6mm_maddr->in6m_ifp == ifp) { 843 LIST_REMOVE(imm, i6mm_chain); 844 in6_leavegroup(imm); 845 } 846 } 847 } 848 } 849 } 850 851 void 852 in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) 853 { 854 struct rtentry *rt; 855 struct inpcb_hdr *inph, *ninph; 856 857 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 858 struct in6pcb *in6p = (struct in6pcb *)inph; 859 if (in6p->in6p_af != AF_INET6) 860 continue; 861 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL && 862 rt->rt_ifp == ifp) 863 in6_rtchange(in6p, 0); 864 } 865 } 866 867 /* 868 * Check for alternatives when higher level complains 869 * about service problems. For now, invalidate cached 870 * routing information. If the route was created dynamically 871 * (by a redirect), time to try a default gateway again. 872 */ 873 void 874 in6_losing(struct in6pcb *in6p) 875 { 876 struct rtentry *rt; 877 struct rt_addrinfo info; 878 879 if (in6p->in6p_af != AF_INET6) 880 return; 881 882 if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL) 883 return; 884 885 memset(&info, 0, sizeof(info)); 886 info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route); 887 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 888 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 889 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 890 if (rt->rt_flags & RTF_DYNAMIC) { 891 (void)rtrequest(RTM_DELETE, rt_getkey(rt), 892 rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL); 893 } 894 /* 895 * A new route can be allocated 896 * the next time output is attempted. 897 */ 898 rtcache_free(&in6p->in6p_route); 899 } 900 901 /* 902 * After a routing change, flush old routing. A new route can be 903 * allocated the next time output is attempted. 904 */ 905 void 906 in6_rtchange(struct in6pcb *in6p, int errno) 907 { 908 if (in6p->in6p_af != AF_INET6) 909 return; 910 911 rtcache_free(&in6p->in6p_route); 912 /* 913 * A new route can be allocated the next time 914 * output is attempted. 915 */ 916 } 917 918 struct in6pcb * 919 in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6, 920 u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp) 921 { 922 struct inpcbhead *head; 923 struct inpcb_hdr *inph; 924 struct in6pcb *in6p, *match = 0; 925 int matchwild = 3, wildcard; 926 u_int16_t lport = lport_arg; 927 928 if (vp) 929 vp->valid = 0; 930 931 head = IN6PCBHASH_PORT(table, lport); 932 LIST_FOREACH(inph, head, inph_lhash) { 933 in6p = (struct in6pcb *)inph; 934 if (in6p->in6p_af != AF_INET6) 935 continue; 936 937 if (in6p->in6p_lport != lport) 938 continue; 939 wildcard = 0; 940 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 941 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 942 continue; 943 } 944 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 945 wildcard++; 946 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 947 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 948 continue; 949 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 950 continue; 951 952 /* duplicate of IPv4 logic */ 953 wildcard = 0; 954 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) && 955 in6p->in6p_faddr.s6_addr32[3]) 956 wildcard++; 957 if (!in6p->in6p_laddr.s6_addr32[3]) { 958 if (laddr6->s6_addr32[3]) 959 wildcard++; 960 } else { 961 if (!laddr6->s6_addr32[3]) 962 wildcard++; 963 else { 964 if (in6p->in6p_laddr.s6_addr32[3] != 965 laddr6->s6_addr32[3]) 966 continue; 967 } 968 } 969 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 970 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 971 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 972 continue; 973 } 974 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 975 wildcard++; 976 } else { 977 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 978 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 979 continue; 980 } 981 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 982 wildcard++; 983 else { 984 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 985 laddr6)) 986 continue; 987 } 988 } 989 if (wildcard && !lookup_wildcard) 990 continue; 991 if (wildcard < matchwild) { 992 match = in6p; 993 matchwild = wildcard; 994 if (matchwild == 0) 995 break; 996 } 997 } 998 if (match && matchwild == 0) 999 return match; 1000 1001 if (vp && table->vestige && table->vestige->init_ports6) { 1002 struct vestigial_inpcb better; 1003 void *state; 1004 1005 state = (*table->vestige->init_ports6)(laddr6, 1006 lport_arg, 1007 lookup_wildcard); 1008 while (table->vestige 1009 && (*table->vestige->next_port6)(state, vp)) { 1010 1011 if (vp->lport != lport) 1012 continue; 1013 wildcard = 0; 1014 if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6)) 1015 wildcard++; 1016 if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) { 1017 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1018 wildcard++; 1019 } else { 1020 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1021 if (vp->v6only) 1022 continue; 1023 } 1024 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1025 wildcard++; 1026 else { 1027 if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6)) 1028 continue; 1029 } 1030 } 1031 if (wildcard && !lookup_wildcard) 1032 continue; 1033 if (wildcard < matchwild) { 1034 better = *vp; 1035 match = (void*)&better; 1036 1037 matchwild = wildcard; 1038 if (matchwild == 0) 1039 break; 1040 } 1041 } 1042 1043 if (match) { 1044 if (match != (void*)&better) 1045 return match; 1046 else { 1047 *vp = better; 1048 return 0; 1049 } 1050 } 1051 } 1052 return (match); 1053 } 1054 1055 /* 1056 * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to 1057 * IPv4 mapped address. 1058 */ 1059 struct rtentry * 1060 in6_pcbrtentry(struct in6pcb *in6p) 1061 { 1062 struct rtentry *rt; 1063 struct route *ro; 1064 union { 1065 const struct sockaddr *sa; 1066 const struct sockaddr_in6 *sa6; 1067 #ifdef INET 1068 const struct sockaddr_in *sa4; 1069 #endif 1070 } cdst; 1071 1072 ro = &in6p->in6p_route; 1073 1074 if (in6p->in6p_af != AF_INET6) 1075 return (NULL); 1076 1077 cdst.sa = rtcache_getdst(ro); 1078 if (cdst.sa == NULL) 1079 ; 1080 #ifdef INET 1081 else if (cdst.sa->sa_family == AF_INET) { 1082 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)); 1083 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3]) 1084 rtcache_free(ro); 1085 } 1086 #endif 1087 else { 1088 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr, 1089 &in6p->in6p_faddr)) 1090 rtcache_free(ro); 1091 } 1092 if ((rt = rtcache_validate(ro)) == NULL) 1093 rt = rtcache_update(ro, 1); 1094 #ifdef INET 1095 if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 1096 union { 1097 struct sockaddr dst; 1098 struct sockaddr_in dst4; 1099 } u; 1100 struct in_addr addr; 1101 1102 addr.s_addr = in6p->in6p_faddr.s6_addr32[3]; 1103 1104 sockaddr_in_init(&u.dst4, &addr, 0); 1105 rtcache_setdst(ro, &u.dst); 1106 1107 rt = rtcache_init(ro); 1108 } else 1109 #endif 1110 if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 1111 union { 1112 struct sockaddr dst; 1113 struct sockaddr_in6 dst6; 1114 } u; 1115 1116 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0); 1117 rtcache_setdst(ro, &u.dst); 1118 1119 rt = rtcache_init(ro); 1120 } 1121 return rt; 1122 } 1123 1124 struct in6pcb * 1125 in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6, 1126 u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg, 1127 int faith, 1128 struct vestigial_inpcb *vp) 1129 { 1130 struct inpcbhead *head; 1131 struct inpcb_hdr *inph; 1132 struct in6pcb *in6p; 1133 u_int16_t fport = fport_arg, lport = lport_arg; 1134 1135 if (vp) 1136 vp->valid = 0; 1137 1138 head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport); 1139 LIST_FOREACH(inph, head, inph_hash) { 1140 in6p = (struct in6pcb *)inph; 1141 if (in6p->in6p_af != AF_INET6) 1142 continue; 1143 1144 /* find exact match on both source and dest */ 1145 if (in6p->in6p_fport != fport) 1146 continue; 1147 if (in6p->in6p_lport != lport) 1148 continue; 1149 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 1150 continue; 1151 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 1152 continue; 1153 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 1154 continue; 1155 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1156 continue; 1157 if ((IN6_IS_ADDR_V4MAPPED(laddr6) || 1158 IN6_IS_ADDR_V4MAPPED(faddr6)) && 1159 (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) 1160 continue; 1161 return in6p; 1162 } 1163 if (vp && table->vestige) { 1164 if ((*table->vestige->lookup6)(faddr6, fport_arg, 1165 laddr6, lport_arg, vp)) 1166 return 0; 1167 } 1168 1169 return NULL; 1170 } 1171 1172 struct in6pcb * 1173 in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6, 1174 u_int lport_arg, int faith) 1175 { 1176 struct inpcbhead *head; 1177 struct inpcb_hdr *inph; 1178 struct in6pcb *in6p; 1179 u_int16_t lport = lport_arg; 1180 #ifdef INET 1181 struct in6_addr zero_mapped; 1182 #endif 1183 1184 head = IN6PCBHASH_BIND(table, laddr6, lport); 1185 LIST_FOREACH(inph, head, inph_hash) { 1186 in6p = (struct in6pcb *)inph; 1187 if (in6p->in6p_af != AF_INET6) 1188 continue; 1189 1190 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1191 continue; 1192 if (in6p->in6p_fport != 0) 1193 continue; 1194 if (in6p->in6p_lport != lport) 1195 continue; 1196 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1197 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1198 continue; 1199 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1200 goto out; 1201 } 1202 #ifdef INET 1203 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1204 memset(&zero_mapped, 0, sizeof(zero_mapped)); 1205 zero_mapped.s6_addr16[5] = 0xffff; 1206 head = IN6PCBHASH_BIND(table, &zero_mapped, lport); 1207 LIST_FOREACH(inph, head, inph_hash) { 1208 in6p = (struct in6pcb *)inph; 1209 if (in6p->in6p_af != AF_INET6) 1210 continue; 1211 1212 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1213 continue; 1214 if (in6p->in6p_fport != 0) 1215 continue; 1216 if (in6p->in6p_lport != lport) 1217 continue; 1218 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1219 continue; 1220 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped)) 1221 goto out; 1222 } 1223 } 1224 #endif 1225 head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport); 1226 LIST_FOREACH(inph, head, inph_hash) { 1227 in6p = (struct in6pcb *)inph; 1228 if (in6p->in6p_af != AF_INET6) 1229 continue; 1230 1231 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1232 continue; 1233 if (in6p->in6p_fport != 0) 1234 continue; 1235 if (in6p->in6p_lport != lport) 1236 continue; 1237 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1238 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1239 continue; 1240 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr)) 1241 goto out; 1242 } 1243 return (NULL); 1244 1245 out: 1246 inph = &in6p->in6p_head; 1247 if (inph != LIST_FIRST(head)) { 1248 LIST_REMOVE(inph, inph_hash); 1249 LIST_INSERT_HEAD(head, inph, inph_hash); 1250 } 1251 return in6p; 1252 } 1253 1254 void 1255 in6_pcbstate(struct in6pcb *in6p, int state) 1256 { 1257 1258 if (in6p->in6p_af != AF_INET6) 1259 return; 1260 1261 if (in6p->in6p_state > IN6P_ATTACHED) 1262 LIST_REMOVE(&in6p->in6p_head, inph_hash); 1263 1264 switch (state) { 1265 case IN6P_BOUND: 1266 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table, 1267 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1268 inph_hash); 1269 break; 1270 case IN6P_CONNECTED: 1271 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table, 1272 &in6p->in6p_faddr, in6p->in6p_fport, 1273 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1274 inph_hash); 1275 break; 1276 } 1277 1278 in6p->in6p_state = state; 1279 } 1280
Indexes created Wed Oct 22 13:09:56 GMT 2025