in6_pcb.c revision 1.123.2.3
1 /* $NetBSD: in6_pcb.c,v 1.123.2.3 2014/05/18 17:46:13 rmind 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 1.123.2.3 2014/05/18 17:46:13 rmind 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/ip6.h> 93 #include <netinet/portalgo.h> 94 #include <netinet6/ip6_var.h> 95 #define __INPCB_PRIVATE 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 inpcbtable_t * 144 in6_pcbinit(size_t bindhashsize, size_t connecthashsize, int flags) 145 { 146 static ONCE_DECL(control); 147 inpcbtable_t *inpt; 148 149 RUN_ONCE(&control, in6pcb_poolinit); 150 inpt = inpcb_init(bindhashsize, connecthashsize, flags); 151 inpt->inpt_lastport = (u_int16_t)ip6_anonportmax; 152 return inpt; 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 #if defined(IPSEC) 162 int error; 163 #endif 164 165 s = splnet(); 166 in6p = pool_get(&in6pcb_pool, PR_NOWAIT); 167 splx(s); 168 if (in6p == NULL) 169 return (ENOBUFS); 170 memset((void *)in6p, 0, sizeof(*in6p)); 171 in6p->in6p_af = AF_INET6; 172 in6p->in6p_table = table; 173 in6p->in6p_socket = so; 174 in6p->in6p_hops = -1; /* use kernel default */ 175 in6p->in6p_icmp6filt = NULL; 176 in6p->in6p_portalgo = PORTALGO_DEFAULT; 177 in6p->in6p_bindportonsend = false; 178 #if defined(IPSEC) 179 error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp); 180 if (error != 0) { 181 s = splnet(); 182 pool_put(&in6pcb_pool, in6p); 183 splx(s); 184 return error; 185 } 186 #endif /* IPSEC */ 187 s = splnet(); 188 TAILQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p, 189 inph_queue); 190 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 191 &in6p->in6p_head, inph_lhash); 192 in6_pcbstate(in6p, IN6P_ATTACHED); 193 splx(s); 194 if (ip6_v6only) 195 in6p->in6p_flags |= IN6P_IPV6_V6ONLY; 196 so->so_pcb = (void *)in6p; 197 return (0); 198 } 199 200 /* 201 * Bind address from sin6 to in6p. 202 */ 203 static int 204 in6_pcbbind_addr(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 205 { 206 int error; 207 208 /* 209 * We should check the family, but old programs 210 * incorrectly fail to intialize it. 211 */ 212 if (sin6->sin6_family != AF_INET6) 213 return (EAFNOSUPPORT); 214 215 #ifndef INET 216 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 217 return (EADDRNOTAVAIL); 218 #endif 219 220 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 221 return (error); 222 223 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 224 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 225 return (EINVAL); 226 if (sin6->sin6_addr.s6_addr32[3]) { 227 struct sockaddr_in sin; 228 229 memset(&sin, 0, sizeof(sin)); 230 sin.sin_len = sizeof(sin); 231 sin.sin_family = AF_INET; 232 bcopy(&sin6->sin6_addr.s6_addr32[3], 233 &sin.sin_addr, sizeof(sin.sin_addr)); 234 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 235 return EADDRNOTAVAIL; 236 } 237 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 238 struct ifaddr *ia = NULL; 239 240 if ((in6p->in6p_flags & IN6P_FAITH) == 0 && 241 (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 242 return (EADDRNOTAVAIL); 243 244 /* 245 * bind to an anycast address might accidentally 246 * cause sending a packet with an anycast source 247 * address, so we forbid it. 248 * 249 * We should allow to bind to a deprecated address, 250 * since the application dare to use it. 251 * But, can we assume that they are careful enough 252 * to check if the address is deprecated or not? 253 * Maybe, as a safeguard, we should have a setsockopt 254 * flag to control the bind(2) behavior against 255 * deprecated addresses (default: forbid bind(2)). 256 */ 257 if (ia && 258 ((struct in6_ifaddr *)ia)->ia6_flags & 259 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) 260 return (EADDRNOTAVAIL); 261 } 262 263 264 in6p->in6p_laddr = sin6->sin6_addr; 265 266 267 return (0); 268 } 269 270 /* 271 * Bind port from sin6 to in6p. 272 */ 273 static int 274 in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 275 { 276 struct inpcbtable *table = in6p->in6p_table; 277 struct socket *so = in6p->in6p_socket; 278 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 279 int error; 280 281 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 282 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 283 (so->so_options & SO_ACCEPTCONN) == 0)) 284 wild = 1; 285 286 if (sin6->sin6_port != 0) { 287 enum kauth_network_req req; 288 289 #ifndef IPNOPRIVPORTS 290 if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED) 291 req = KAUTH_REQ_NETWORK_BIND_PRIVPORT; 292 else 293 #endif /* IPNOPRIVPORTS */ 294 req = KAUTH_REQ_NETWORK_BIND_PORT; 295 296 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND, 297 req, so, sin6, NULL); 298 if (error) 299 return (EACCES); 300 } 301 302 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 303 /* 304 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 305 * allow compepte duplication of binding if 306 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 307 * and a multicast address is bound on both 308 * new and duplicated sockets. 309 */ 310 if (so->so_options & SO_REUSEADDR) 311 reuseport = SO_REUSEADDR|SO_REUSEPORT; 312 } 313 314 if (sin6->sin6_port != 0) { 315 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 316 #ifdef INET 317 struct inpcb *t; 318 struct vestigial_inpcb vestige; 319 320 t = inpcb_lookup_local(table, 321 *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 322 sin6->sin6_port, wild, &vestige); 323 if (t && (reuseport & t->inp_socket->so_options) == 0) 324 return (EADDRINUSE); 325 if (!t 326 && vestige.valid 327 && !(reuseport && vestige.reuse_port)) 328 return EADDRINUSE; 329 #else 330 return (EADDRNOTAVAIL); 331 #endif 332 } 333 334 { 335 struct in6pcb *t; 336 struct vestigial_inpcb vestige; 337 338 t = in6_pcblookup_port(table, &sin6->sin6_addr, 339 sin6->sin6_port, wild, &vestige); 340 if (t && (reuseport & t->in6p_socket->so_options) == 0) 341 return (EADDRINUSE); 342 if (!t 343 && vestige.valid 344 && !(reuseport && vestige.reuse_port)) 345 return EADDRINUSE; 346 } 347 } 348 349 if (sin6->sin6_port == 0) { 350 int e; 351 e = in6_pcbsetport(sin6, in6p, l); 352 if (e != 0) 353 return (e); 354 } else { 355 in6p->in6p_lport = sin6->sin6_port; 356 in6_pcbstate(in6p, IN6P_BOUND); 357 } 358 359 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 360 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 361 &in6p->in6p_head, inph_lhash); 362 363 return (0); 364 } 365 366 int 367 in6_pcbbind(void *v, struct mbuf *nam, struct lwp *l) 368 { 369 struct in6pcb *in6p = v; 370 struct sockaddr_in6 lsin6; 371 struct sockaddr_in6 *sin6 = NULL; 372 int error; 373 374 if (in6p->in6p_af != AF_INET6) 375 return (EINVAL); 376 377 /* 378 * If we already have a local port or a local address it means we're 379 * bounded. 380 */ 381 if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 382 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 383 in6p->in6p_laddr.s6_addr32[3] == 0))) 384 return (EINVAL); 385 386 if (nam != NULL) { 387 /* We were provided a sockaddr_in6 to use. */ 388 sin6 = mtod(nam, struct sockaddr_in6 *); 389 if (nam->m_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 mbuf *nam, struct lwp *l) 430 { 431 struct rtentry *rt; 432 struct in6pcb *in6p = v; 433 struct in6_addr *in6a = NULL; 434 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 435 struct ifnet *ifp = NULL; /* outgoing interface */ 436 int error = 0; 437 int scope_ambiguous = 0; 438 #ifdef INET 439 struct in6_addr mapped; 440 #endif 441 struct sockaddr_in6 tmp; 442 struct vestigial_inpcb vestige; 443 444 (void)&in6a; /* XXX fool gcc */ 445 446 if (in6p->in6p_af != AF_INET6) 447 return (EINVAL); 448 449 if (nam->m_len != sizeof(*sin6)) 450 return (EINVAL); 451 if (sin6->sin6_family != AF_INET6) 452 return (EAFNOSUPPORT); 453 if (sin6->sin6_port == 0) 454 return (EADDRNOTAVAIL); 455 456 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 457 in6p->in6p_socket->so_type == SOCK_STREAM) 458 return EADDRNOTAVAIL; 459 460 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) 461 scope_ambiguous = 1; 462 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 463 return(error); 464 465 /* sanity check for mapped address case */ 466 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 467 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 468 return EINVAL; 469 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 470 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 471 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 472 return EINVAL; 473 } else 474 { 475 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 476 return EINVAL; 477 } 478 479 /* protect *sin6 from overwrites */ 480 tmp = *sin6; 481 sin6 = &tmp; 482 483 /* Source address selection. */ 484 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 485 in6p->in6p_laddr.s6_addr32[3] == 0) { 486 #ifdef INET 487 struct sockaddr_in sin, *sinp; 488 489 memset(&sin, 0, sizeof(sin)); 490 sin.sin_len = sizeof(sin); 491 sin.sin_family = AF_INET; 492 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3], 493 sizeof(sin.sin_addr)); 494 sinp = in_selectsrc(&sin, &in6p->in6p_route, 495 in6p->in6p_socket->so_options, NULL, &error); 496 if (sinp == 0) { 497 if (error == 0) 498 error = EADDRNOTAVAIL; 499 return (error); 500 } 501 memset(&mapped, 0, sizeof(mapped)); 502 mapped.s6_addr16[5] = htons(0xffff); 503 memcpy(&mapped.s6_addr32[3], &sinp->sin_addr, sizeof(sinp->sin_addr)); 504 in6a = &mapped; 505 #else 506 return EADDRNOTAVAIL; 507 #endif 508 } else { 509 /* 510 * XXX: in6_selectsrc might replace the bound local address 511 * with the address specified by setsockopt(IPV6_PKTINFO). 512 * Is it the intended behavior? 513 */ 514 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 515 in6p->in6p_moptions, 516 &in6p->in6p_route, 517 &in6p->in6p_laddr, &ifp, &error); 518 if (ifp && scope_ambiguous && 519 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 520 return(error); 521 } 522 523 if (in6a == 0) { 524 if (error == 0) 525 error = EADDRNOTAVAIL; 526 return (error); 527 } 528 } 529 if (ifp == NULL && (rt = rtcache_validate(&in6p->in6p_route)) != NULL) 530 ifp = rt->rt_ifp; 531 532 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 533 534 if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr, 535 sin6->sin6_port, 536 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr, 537 in6p->in6p_lport, 0, &vestige) 538 || vestige.valid) 539 return (EADDRINUSE); 540 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 541 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 542 in6p->in6p_laddr.s6_addr32[3] == 0)) 543 { 544 if (in6p->in6p_lport == 0) { 545 error = in6_pcbbind(in6p, NULL, l); 546 if (error != 0) 547 return error; 548 } 549 in6p->in6p_laddr = *in6a; 550 } 551 in6p->in6p_faddr = sin6->sin6_addr; 552 in6p->in6p_fport = sin6->sin6_port; 553 554 /* Late bind, if needed */ 555 if (in6p->in6p_bindportonsend) { 556 struct sockaddr_in6 lsin = *((const struct sockaddr_in6 *) 557 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 558 lsin.sin6_addr = in6p->in6p_laddr; 559 lsin.sin6_port = 0; 560 561 if ((error = in6_pcbbind_port(in6p, &lsin, l)) != 0) 562 return error; 563 } 564 565 in6_pcbstate(in6p, IN6P_CONNECTED); 566 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 567 if (ip6_auto_flowlabel) 568 in6p->in6p_flowinfo |= 569 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 570 #if defined(IPSEC) 571 if (in6p->in6p_socket->so_type == SOCK_STREAM) 572 ipsec_pcbconn(in6p->in6p_sp); 573 #endif 574 return (0); 575 } 576 577 void 578 in6_pcbdisconnect(struct in6pcb *in6p) 579 { 580 memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr)); 581 in6p->in6p_fport = 0; 582 in6_pcbstate(in6p, IN6P_BOUND); 583 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 584 #if defined(IPSEC) 585 ipsec_pcbdisconn(in6p->in6p_sp); 586 #endif 587 if (in6p->in6p_socket->so_state & SS_NOFDREF) 588 in6_pcbdetach(in6p); 589 } 590 591 void 592 in6_pcbdetach(struct in6pcb *in6p) 593 { 594 struct socket *so = in6p->in6p_socket; 595 int s; 596 597 if (in6p->in6p_af != AF_INET6) 598 return; 599 600 #if defined(IPSEC) 601 ipsec6_delete_pcbpolicy(in6p); 602 #endif /* IPSEC */ 603 so->so_pcb = 0; 604 if (in6p->in6p_options) 605 m_freem(in6p->in6p_options); 606 if (in6p->in6p_outputopts != NULL) { 607 ip6_clearpktopts(in6p->in6p_outputopts, -1); 608 free(in6p->in6p_outputopts, M_IP6OPT); 609 } 610 rtcache_free(&in6p->in6p_route); 611 ip6_freemoptions(in6p->in6p_moptions); 612 s = splnet(); 613 in6_pcbstate(in6p, IN6P_ATTACHED); 614 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 615 TAILQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head, 616 inph_queue); 617 pool_put(&in6pcb_pool, in6p); 618 splx(s); 619 sofree(so); /* drops the socket's lock */ 620 mutex_enter(softnet_lock); /* reacquire it */ 621 } 622 623 void 624 in6_setsockaddr(struct in6pcb *in6p, struct mbuf *nam) 625 { 626 struct sockaddr_in6 *sin6; 627 628 if (in6p->in6p_af != AF_INET6) 629 return; 630 631 nam->m_len = sizeof(*sin6); 632 sin6 = mtod(nam, struct sockaddr_in6 *); 633 sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0); 634 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 635 } 636 637 void 638 in6_setpeeraddr(struct in6pcb *in6p, struct mbuf *nam) 639 { 640 struct sockaddr_in6 *sin6; 641 642 if (in6p->in6p_af != AF_INET6) 643 return; 644 645 nam->m_len = sizeof(*sin6); 646 sin6 = mtod(nam, struct sockaddr_in6 *); 647 sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0); 648 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 649 } 650 651 /* 652 * Pass some notification to all connections of a protocol 653 * associated with address dst. The local address and/or port numbers 654 * may be specified to limit the search. The "usual action" will be 655 * taken, depending on the ctlinput cmd. The caller must filter any 656 * cmds that are uninteresting (e.g., no error in the map). 657 * Call the protocol specific routine (if any) to report 658 * any errors for each matching socket. 659 * 660 * Must be called at splsoftnet. 661 * 662 * Note: src (4th arg) carries the flowlabel value on the original IPv6 663 * header, in sin6_flowinfo member. 664 */ 665 int 666 in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst, 667 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd, 668 void *cmdarg, void (*notify)(struct in6pcb *, int)) 669 { 670 struct rtentry *rt; 671 struct 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 == 0 || 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 } 845 } 846 847 void 848 in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) 849 { 850 struct rtentry *rt; 851 struct inpcb_hdr *inph, *ninph; 852 853 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 854 struct in6pcb *in6p = (struct in6pcb *)inph; 855 if (in6p->in6p_af != AF_INET6) 856 continue; 857 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL && 858 rt->rt_ifp == ifp) 859 in6_rtchange(in6p, 0); 860 } 861 } 862 863 /* 864 * Check for alternatives when higher level complains 865 * about service problems. For now, invalidate cached 866 * routing information. If the route was created dynamically 867 * (by a redirect), time to try a default gateway again. 868 */ 869 void 870 in6_losing(struct in6pcb *in6p) 871 { 872 struct rtentry *rt; 873 struct rt_addrinfo info; 874 875 if (in6p->in6p_af != AF_INET6) 876 return; 877 878 if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL) 879 return; 880 881 memset(&info, 0, sizeof(info)); 882 info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route); 883 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 884 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 885 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 886 if (rt->rt_flags & RTF_DYNAMIC) { 887 (void)rtrequest(RTM_DELETE, rt_getkey(rt), 888 rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL); 889 } 890 /* 891 * A new route can be allocated 892 * the next time output is attempted. 893 */ 894 rtcache_free(&in6p->in6p_route); 895 } 896 897 /* 898 * After a routing change, flush old routing. A new route can be 899 * allocated the next time output is attempted. 900 */ 901 void 902 in6_rtchange(struct in6pcb *in6p, int errno) 903 { 904 if (in6p->in6p_af != AF_INET6) 905 return; 906 907 rtcache_free(&in6p->in6p_route); 908 /* 909 * A new route can be allocated the next time 910 * output is attempted. 911 */ 912 } 913 914 struct in6pcb * 915 in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6, 916 u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp) 917 { 918 struct inpcbhead *head; 919 struct inpcb_hdr *inph; 920 struct in6pcb *in6p, *match = 0; 921 struct vestigial_hooks *vestige; 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 && (vestige = table->inpt_vestige) != NULL && 999 vestige->init_ports6 != NULL) { 1000 struct vestigial_inpcb better; 1001 void *state; 1002 1003 state = (*vestige->init_ports6)(laddr6, lport_arg, 1004 lookup_wildcard); 1005 while ((*vestige->next_port6)(state, vp)) { 1006 1007 if (vp->lport != lport) 1008 continue; 1009 wildcard = 0; 1010 if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6)) 1011 wildcard++; 1012 if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) { 1013 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1014 wildcard++; 1015 } else { 1016 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1017 if (vp->v6only) 1018 continue; 1019 } 1020 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1021 wildcard++; 1022 else { 1023 if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6)) 1024 continue; 1025 } 1026 } 1027 if (wildcard && !lookup_wildcard) 1028 continue; 1029 if (wildcard < matchwild) { 1030 better = *vp; 1031 match = (void*)&better; 1032 1033 matchwild = wildcard; 1034 if (matchwild == 0) 1035 break; 1036 } 1037 } 1038 1039 if (match) { 1040 if (match != (void*)&better) 1041 return match; 1042 else { 1043 *vp = better; 1044 return 0; 1045 } 1046 } 1047 } 1048 return (match); 1049 } 1050 1051 /* 1052 * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to 1053 * IPv4 mapped address. 1054 */ 1055 struct rtentry * 1056 in6_pcbrtentry(struct in6pcb *in6p) 1057 { 1058 struct rtentry *rt; 1059 struct route *ro; 1060 union { 1061 const struct sockaddr *sa; 1062 const struct sockaddr_in6 *sa6; 1063 #ifdef INET 1064 const struct sockaddr_in *sa4; 1065 #endif 1066 } cdst; 1067 1068 ro = &in6p->in6p_route; 1069 1070 if (in6p->in6p_af != AF_INET6) 1071 return (NULL); 1072 1073 cdst.sa = rtcache_getdst(ro); 1074 if (cdst.sa == NULL) 1075 ; 1076 #ifdef INET 1077 else if (cdst.sa->sa_family == AF_INET) { 1078 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)); 1079 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3]) 1080 rtcache_free(ro); 1081 } 1082 #endif 1083 else { 1084 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr, 1085 &in6p->in6p_faddr)) 1086 rtcache_free(ro); 1087 } 1088 if ((rt = rtcache_validate(ro)) == NULL) 1089 rt = rtcache_update(ro, 1); 1090 #ifdef INET 1091 if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 1092 union { 1093 struct sockaddr dst; 1094 struct sockaddr_in dst4; 1095 } u; 1096 struct in_addr addr; 1097 1098 addr.s_addr = in6p->in6p_faddr.s6_addr32[3]; 1099 1100 sockaddr_in_init(&u.dst4, &addr, 0); 1101 rtcache_setdst(ro, &u.dst); 1102 1103 rt = rtcache_init(ro); 1104 } else 1105 #endif 1106 if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 1107 union { 1108 struct sockaddr dst; 1109 struct sockaddr_in6 dst6; 1110 } u; 1111 1112 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0); 1113 rtcache_setdst(ro, &u.dst); 1114 1115 rt = rtcache_init(ro); 1116 } 1117 return rt; 1118 } 1119 1120 struct in6pcb * 1121 in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6, 1122 u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg, 1123 int faith, 1124 struct vestigial_inpcb *vp) 1125 { 1126 struct inpcbhead *head; 1127 struct inpcb_hdr *inph; 1128 struct in6pcb *in6p; 1129 struct vestigial_hooks *vestige; 1130 u_int16_t fport = fport_arg, lport = lport_arg; 1131 1132 if (vp) 1133 vp->valid = 0; 1134 1135 head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport); 1136 LIST_FOREACH(inph, head, inph_hash) { 1137 in6p = (struct in6pcb *)inph; 1138 if (in6p->in6p_af != AF_INET6) 1139 continue; 1140 1141 /* find exact match on both source and dest */ 1142 if (in6p->in6p_fport != fport) 1143 continue; 1144 if (in6p->in6p_lport != lport) 1145 continue; 1146 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 1147 continue; 1148 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 1149 continue; 1150 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 1151 continue; 1152 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1153 continue; 1154 if ((IN6_IS_ADDR_V4MAPPED(laddr6) || 1155 IN6_IS_ADDR_V4MAPPED(faddr6)) && 1156 (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) 1157 continue; 1158 return in6p; 1159 } 1160 if (vp && (vestige = table->inpt_vestige) != NULL) { 1161 if ((*vestige->lookup6)(faddr6, fport_arg, laddr6, lport_arg, vp)) 1162 return 0; 1163 } 1164 1165 return NULL; 1166 } 1167 1168 struct in6pcb * 1169 in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6, 1170 u_int lport_arg, int faith) 1171 { 1172 struct inpcbhead *head; 1173 struct inpcb_hdr *inph; 1174 struct in6pcb *in6p; 1175 u_int16_t lport = lport_arg; 1176 #ifdef INET 1177 struct in6_addr zero_mapped; 1178 #endif 1179 1180 head = IN6PCBHASH_BIND(table, laddr6, lport); 1181 LIST_FOREACH(inph, head, inph_hash) { 1182 in6p = (struct in6pcb *)inph; 1183 if (in6p->in6p_af != AF_INET6) 1184 continue; 1185 1186 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1187 continue; 1188 if (in6p->in6p_fport != 0) 1189 continue; 1190 if (in6p->in6p_lport != lport) 1191 continue; 1192 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1193 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1194 continue; 1195 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1196 goto out; 1197 } 1198 #ifdef INET 1199 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1200 memset(&zero_mapped, 0, sizeof(zero_mapped)); 1201 zero_mapped.s6_addr16[5] = 0xffff; 1202 head = IN6PCBHASH_BIND(table, &zero_mapped, lport); 1203 LIST_FOREACH(inph, head, inph_hash) { 1204 in6p = (struct in6pcb *)inph; 1205 if (in6p->in6p_af != AF_INET6) 1206 continue; 1207 1208 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1209 continue; 1210 if (in6p->in6p_fport != 0) 1211 continue; 1212 if (in6p->in6p_lport != lport) 1213 continue; 1214 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1215 continue; 1216 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped)) 1217 goto out; 1218 } 1219 } 1220 #endif 1221 head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport); 1222 LIST_FOREACH(inph, head, inph_hash) { 1223 in6p = (struct in6pcb *)inph; 1224 if (in6p->in6p_af != AF_INET6) 1225 continue; 1226 1227 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1228 continue; 1229 if (in6p->in6p_fport != 0) 1230 continue; 1231 if (in6p->in6p_lport != lport) 1232 continue; 1233 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1234 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1235 continue; 1236 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr)) 1237 goto out; 1238 } 1239 return (NULL); 1240 1241 out: 1242 inph = &in6p->in6p_head; 1243 if (inph != LIST_FIRST(head)) { 1244 LIST_REMOVE(inph, inph_hash); 1245 LIST_INSERT_HEAD(head, inph, inph_hash); 1246 } 1247 return in6p; 1248 } 1249 1250 void 1251 in6_pcbstate(struct in6pcb *in6p, int state) 1252 { 1253 1254 if (in6p->in6p_af != AF_INET6) 1255 return; 1256 1257 if (in6p->in6p_state > IN6P_ATTACHED) 1258 LIST_REMOVE(&in6p->in6p_head, inph_hash); 1259 1260 switch (state) { 1261 case IN6P_BOUND: 1262 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table, 1263 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1264 inph_hash); 1265 break; 1266 case IN6P_CONNECTED: 1267 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table, 1268 &in6p->in6p_faddr, in6p->in6p_fport, 1269 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1270 inph_hash); 1271 break; 1272 } 1273 1274 in6p->in6p_state = state; 1275 } 1276
Indexes created Fri Oct 31 04:09:52 GMT 2025