in6_pcb.c revision 1.128.2.2.4.1
1 /* $NetBSD: in6_pcb.c,v 1.128.2.2.4.1 2017/01/18 08:46:46 skrll 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 1.128.2.2.4.1 2017/01/18 08:46:46 skrll 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/mbuf.h> 73 #include <sys/protosw.h> 74 #include <sys/socket.h> 75 #include <sys/socketvar.h> 76 #include <sys/ioctl.h> 77 #include <sys/errno.h> 78 #include <sys/time.h> 79 #include <sys/proc.h> 80 #include <sys/kauth.h> 81 #include <sys/domain.h> 82 #include <sys/once.h> 83 84 #include <net/if.h> 85 #include <net/route.h> 86 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 #include <netinet/in_systm.h> 90 #include <netinet/ip.h> 91 #include <netinet/in_pcb.h> 92 #include <netinet/ip6.h> 93 #include <netinet/portalgo.h> 94 #include <netinet6/ip6_var.h> 95 #include <netinet6/in6_pcb.h> 96 #include <netinet6/scope6_var.h> 97 #include <netinet6/nd6.h> 98 99 #include "faith.h" 100 101 #ifdef IPSEC 102 #include <netipsec/ipsec.h> 103 #include <netipsec/ipsec6.h> 104 #include <netipsec/key.h> 105 #endif /* IPSEC */ 106 107 #include <netinet/tcp_vtw.h> 108 109 const struct in6_addr zeroin6_addr; 110 111 #define IN6PCBHASH_PORT(table, lport) \ 112 &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash] 113 #define IN6PCBHASH_BIND(table, laddr, lport) \ 114 &(table)->inpt_bindhashtbl[ \ 115 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ 116 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + ntohs(lport)) & \ 117 (table)->inpt_bindhash] 118 #define IN6PCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 119 &(table)->inpt_bindhashtbl[ \ 120 ((((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \ 121 (faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3]) + ntohs(fport)) + \ 122 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ 123 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + \ 124 ntohs(lport))) & (table)->inpt_bindhash] 125 126 int ip6_anonportmin = IPV6PORT_ANONMIN; 127 int ip6_anonportmax = IPV6PORT_ANONMAX; 128 int ip6_lowportmin = IPV6PORT_RESERVEDMIN; 129 int ip6_lowportmax = IPV6PORT_RESERVEDMAX; 130 131 static struct pool in6pcb_pool; 132 133 static int 134 in6pcb_poolinit(void) 135 { 136 137 pool_init(&in6pcb_pool, sizeof(struct in6pcb), 0, 0, 0, "in6pcbpl", 138 NULL, IPL_SOFTNET); 139 return 0; 140 } 141 142 void 143 in6_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize) 144 { 145 static ONCE_DECL(control); 146 147 in_pcbinit(table, bindhashsize, connecthashsize); 148 table->inpt_lastport = (u_int16_t)ip6_anonportmax; 149 150 RUN_ONCE(&control, in6pcb_poolinit); 151 } 152 153 int 154 in6_pcballoc(struct socket *so, void *v) 155 { 156 struct inpcbtable *table = v; 157 struct in6pcb *in6p; 158 int s; 159 160 s = splnet(); 161 in6p = pool_get(&in6pcb_pool, PR_NOWAIT); 162 splx(s); 163 if (in6p == NULL) 164 return (ENOBUFS); 165 memset((void *)in6p, 0, sizeof(*in6p)); 166 in6p->in6p_af = AF_INET6; 167 in6p->in6p_table = table; 168 in6p->in6p_socket = so; 169 in6p->in6p_hops = -1; /* use kernel default */ 170 in6p->in6p_icmp6filt = NULL; 171 in6p->in6p_portalgo = PORTALGO_DEFAULT; 172 in6p->in6p_bindportonsend = false; 173 #if defined(IPSEC) 174 if (ipsec_enabled) { 175 int error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp); 176 if (error != 0) { 177 s = splnet(); 178 pool_put(&in6pcb_pool, in6p); 179 splx(s); 180 return error; 181 } 182 } 183 #endif /* IPSEC */ 184 s = splnet(); 185 TAILQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p, 186 inph_queue); 187 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 188 &in6p->in6p_head, inph_lhash); 189 in6_pcbstate(in6p, IN6P_ATTACHED); 190 splx(s); 191 if (ip6_v6only) 192 in6p->in6p_flags |= IN6P_IPV6_V6ONLY; 193 so->so_pcb = (void *)in6p; 194 return (0); 195 } 196 197 /* 198 * Bind address from sin6 to in6p. 199 */ 200 static int 201 in6_pcbbind_addr(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 202 { 203 int error; 204 205 /* 206 * We should check the family, but old programs 207 * incorrectly fail to intialize it. 208 */ 209 if (sin6->sin6_family != AF_INET6) 210 return (EAFNOSUPPORT); 211 212 #ifndef INET 213 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 214 return (EADDRNOTAVAIL); 215 #endif 216 217 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 218 return (error); 219 220 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 221 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 222 return (EINVAL); 223 if (sin6->sin6_addr.s6_addr32[3]) { 224 struct sockaddr_in sin; 225 226 memset(&sin, 0, sizeof(sin)); 227 sin.sin_len = sizeof(sin); 228 sin.sin_family = AF_INET; 229 bcopy(&sin6->sin6_addr.s6_addr32[3], 230 &sin.sin_addr, sizeof(sin.sin_addr)); 231 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 232 return EADDRNOTAVAIL; 233 } 234 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 235 struct ifaddr *ia = NULL; 236 237 if ((in6p->in6p_flags & IN6P_FAITH) == 0 && 238 (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 239 return (EADDRNOTAVAIL); 240 241 /* 242 * bind to an anycast address might accidentally 243 * cause sending a packet with an anycast source 244 * address, so we forbid it. 245 * 246 * We should allow to bind to a deprecated address, 247 * since the application dare to use it. 248 * But, can we assume that they are careful enough 249 * to check if the address is deprecated or not? 250 * Maybe, as a safeguard, we should have a setsockopt 251 * flag to control the bind(2) behavior against 252 * deprecated addresses (default: forbid bind(2)). 253 */ 254 if (ia && 255 ((struct in6_ifaddr *)ia)->ia6_flags & 256 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY)) 257 return (EADDRNOTAVAIL); 258 } 259 260 261 in6p->in6p_laddr = sin6->sin6_addr; 262 263 264 return (0); 265 } 266 267 /* 268 * Bind port from sin6 to in6p. 269 */ 270 static int 271 in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 272 { 273 struct inpcbtable *table = in6p->in6p_table; 274 struct socket *so = in6p->in6p_socket; 275 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 276 int error; 277 278 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 279 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 280 (so->so_options & SO_ACCEPTCONN) == 0)) 281 wild = 1; 282 283 if (sin6->sin6_port != 0) { 284 enum kauth_network_req req; 285 286 #ifndef IPNOPRIVPORTS 287 if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED) 288 req = KAUTH_REQ_NETWORK_BIND_PRIVPORT; 289 else 290 #endif /* IPNOPRIVPORTS */ 291 req = KAUTH_REQ_NETWORK_BIND_PORT; 292 293 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND, 294 req, so, sin6, NULL); 295 if (error) 296 return (EACCES); 297 } 298 299 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 300 /* 301 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 302 * allow compepte duplication of binding if 303 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 304 * and a multicast address is bound on both 305 * new and duplicated sockets. 306 */ 307 if (so->so_options & SO_REUSEADDR) 308 reuseport = SO_REUSEADDR|SO_REUSEPORT; 309 } 310 311 if (sin6->sin6_port != 0) { 312 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 313 #ifdef INET 314 struct inpcb *t; 315 struct vestigial_inpcb vestige; 316 317 t = in_pcblookup_port(table, 318 *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 319 sin6->sin6_port, wild, &vestige); 320 if (t && (reuseport & t->inp_socket->so_options) == 0) 321 return (EADDRINUSE); 322 if (!t 323 && vestige.valid 324 && !(reuseport && vestige.reuse_port)) 325 return EADDRINUSE; 326 #else 327 return (EADDRNOTAVAIL); 328 #endif 329 } 330 331 { 332 struct in6pcb *t; 333 struct vestigial_inpcb vestige; 334 335 t = in6_pcblookup_port(table, &sin6->sin6_addr, 336 sin6->sin6_port, wild, &vestige); 337 if (t && (reuseport & t->in6p_socket->so_options) == 0) 338 return (EADDRINUSE); 339 if (!t 340 && vestige.valid 341 && !(reuseport && vestige.reuse_port)) 342 return EADDRINUSE; 343 } 344 } 345 346 if (sin6->sin6_port == 0) { 347 int e; 348 e = in6_pcbsetport(sin6, in6p, l); 349 if (e != 0) 350 return (e); 351 } else { 352 in6p->in6p_lport = sin6->sin6_port; 353 in6_pcbstate(in6p, IN6P_BOUND); 354 } 355 356 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 357 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 358 &in6p->in6p_head, inph_lhash); 359 360 return (0); 361 } 362 363 int 364 in6_pcbbind(void *v, struct mbuf *nam, struct lwp *l) 365 { 366 struct in6pcb *in6p = v; 367 struct sockaddr_in6 lsin6; 368 struct sockaddr_in6 *sin6 = NULL; 369 int error; 370 371 if (in6p->in6p_af != AF_INET6) 372 return (EINVAL); 373 374 /* 375 * If we already have a local port or a local address it means we're 376 * bounded. 377 */ 378 if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 379 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 380 in6p->in6p_laddr.s6_addr32[3] == 0))) 381 return (EINVAL); 382 383 if (nam != NULL) { 384 /* We were provided a sockaddr_in6 to use. */ 385 sin6 = mtod(nam, struct sockaddr_in6 *); 386 if (nam->m_len != sizeof(*sin6)) 387 return (EINVAL); 388 } else { 389 /* We always bind to *something*, even if it's "anything". */ 390 lsin6 = *((const struct sockaddr_in6 *) 391 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 392 sin6 = &lsin6; 393 } 394 395 /* Bind address. */ 396 error = in6_pcbbind_addr(in6p, sin6, l); 397 if (error) 398 return (error); 399 400 /* Bind port. */ 401 error = in6_pcbbind_port(in6p, sin6, l); 402 if (error) { 403 /* 404 * Reset the address here to "any" so we don't "leak" the 405 * in6pcb. 406 */ 407 in6p->in6p_laddr = in6addr_any; 408 409 return (error); 410 } 411 412 413 #if 0 414 in6p->in6p_flowinfo = 0; /* XXX */ 415 #endif 416 return (0); 417 } 418 419 /* 420 * Connect from a socket to a specified address. 421 * Both address and port must be specified in argument sin6. 422 * If don't have a local address for this socket yet, 423 * then pick one. 424 */ 425 int 426 in6_pcbconnect(void *v, struct mbuf *nam, struct lwp *l) 427 { 428 struct rtentry *rt; 429 struct in6pcb *in6p = v; 430 struct in6_addr *in6a = NULL; 431 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 432 struct ifnet *ifp = NULL; /* outgoing interface */ 433 int error = 0; 434 int scope_ambiguous = 0; 435 #ifdef INET 436 struct in6_addr mapped; 437 #endif 438 struct sockaddr_in6 tmp; 439 struct vestigial_inpcb vestige; 440 441 (void)&in6a; /* XXX fool gcc */ 442 443 if (in6p->in6p_af != AF_INET6) 444 return (EINVAL); 445 446 if (nam->m_len != sizeof(*sin6)) 447 return (EINVAL); 448 if (sin6->sin6_family != AF_INET6) 449 return (EAFNOSUPPORT); 450 if (sin6->sin6_port == 0) 451 return (EADDRNOTAVAIL); 452 453 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 454 in6p->in6p_socket->so_type == SOCK_STREAM) 455 return EADDRNOTAVAIL; 456 457 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) 458 scope_ambiguous = 1; 459 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 460 return(error); 461 462 /* sanity check for mapped address case */ 463 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 464 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 465 return EINVAL; 466 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 467 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 468 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 469 return EINVAL; 470 } else 471 { 472 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 473 return EINVAL; 474 } 475 476 /* protect *sin6 from overwrites */ 477 tmp = *sin6; 478 sin6 = &tmp; 479 480 /* Source address selection. */ 481 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 482 in6p->in6p_laddr.s6_addr32[3] == 0) { 483 #ifdef INET 484 struct sockaddr_in sin, *sinp; 485 486 memset(&sin, 0, sizeof(sin)); 487 sin.sin_len = sizeof(sin); 488 sin.sin_family = AF_INET; 489 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3], 490 sizeof(sin.sin_addr)); 491 sinp = in_selectsrc(&sin, &in6p->in6p_route, 492 in6p->in6p_socket->so_options, NULL, &error); 493 if (sinp == 0) { 494 if (error == 0) 495 error = EADDRNOTAVAIL; 496 return (error); 497 } 498 memset(&mapped, 0, sizeof(mapped)); 499 mapped.s6_addr16[5] = htons(0xffff); 500 memcpy(&mapped.s6_addr32[3], &sinp->sin_addr, sizeof(sinp->sin_addr)); 501 in6a = &mapped; 502 #else 503 return EADDRNOTAVAIL; 504 #endif 505 } else { 506 /* 507 * XXX: in6_selectsrc might replace the bound local address 508 * with the address specified by setsockopt(IPV6_PKTINFO). 509 * Is it the intended behavior? 510 */ 511 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 512 in6p->in6p_moptions, 513 &in6p->in6p_route, 514 &in6p->in6p_laddr, &ifp, &error); 515 if (ifp && scope_ambiguous && 516 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 517 return(error); 518 } 519 520 if (in6a == 0) { 521 if (error == 0) 522 error = EADDRNOTAVAIL; 523 return (error); 524 } 525 } 526 if (ifp == NULL && (rt = rtcache_validate(&in6p->in6p_route)) != NULL) 527 ifp = rt->rt_ifp; 528 529 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 530 531 if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr, 532 sin6->sin6_port, 533 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr, 534 in6p->in6p_lport, 0, &vestige) 535 || vestige.valid) 536 return (EADDRINUSE); 537 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 538 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 539 in6p->in6p_laddr.s6_addr32[3] == 0)) 540 { 541 if (in6p->in6p_lport == 0) { 542 error = in6_pcbbind(in6p, NULL, l); 543 if (error != 0) 544 return error; 545 } 546 in6p->in6p_laddr = *in6a; 547 } 548 in6p->in6p_faddr = sin6->sin6_addr; 549 in6p->in6p_fport = sin6->sin6_port; 550 551 /* Late bind, if needed */ 552 if (in6p->in6p_bindportonsend) { 553 struct sockaddr_in6 lsin = *((const struct sockaddr_in6 *) 554 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 555 lsin.sin6_addr = in6p->in6p_laddr; 556 lsin.sin6_port = 0; 557 558 if ((error = in6_pcbbind_port(in6p, &lsin, l)) != 0) 559 return error; 560 } 561 562 in6_pcbstate(in6p, IN6P_CONNECTED); 563 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 564 if (ip6_auto_flowlabel) 565 in6p->in6p_flowinfo |= 566 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 567 #if defined(IPSEC) 568 if (ipsec_enabled && in6p->in6p_socket->so_type == SOCK_STREAM) 569 ipsec_pcbconn(in6p->in6p_sp); 570 #endif 571 return (0); 572 } 573 574 void 575 in6_pcbdisconnect(struct in6pcb *in6p) 576 { 577 memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr)); 578 in6p->in6p_fport = 0; 579 in6_pcbstate(in6p, IN6P_BOUND); 580 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 581 #if defined(IPSEC) 582 if (ipsec_enabled) 583 ipsec_pcbdisconn(in6p->in6p_sp); 584 #endif 585 if (in6p->in6p_socket->so_state & SS_NOFDREF) 586 in6_pcbdetach(in6p); 587 } 588 589 void 590 in6_pcbdetach(struct in6pcb *in6p) 591 { 592 struct socket *so = in6p->in6p_socket; 593 int s; 594 595 if (in6p->in6p_af != AF_INET6) 596 return; 597 598 #if defined(IPSEC) 599 if (ipsec_enabled) 600 ipsec6_delete_pcbpolicy(in6p); 601 #endif 602 so->so_pcb = NULL; 603 604 s = splnet(); 605 in6_pcbstate(in6p, IN6P_ATTACHED); 606 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 607 TAILQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head, 608 inph_queue); 609 splx(s); 610 611 if (in6p->in6p_options) { 612 m_freem(in6p->in6p_options); 613 } 614 if (in6p->in6p_outputopts != NULL) { 615 ip6_clearpktopts(in6p->in6p_outputopts, -1); 616 free(in6p->in6p_outputopts, M_IP6OPT); 617 } 618 rtcache_free(&in6p->in6p_route); 619 ip6_freemoptions(in6p->in6p_moptions); 620 sofree(so); /* drops the socket's lock */ 621 622 pool_put(&in6pcb_pool, in6p); 623 mutex_enter(softnet_lock); /* reacquire it */ 624 } 625 626 void 627 in6_setsockaddr(struct in6pcb *in6p, struct mbuf *nam) 628 { 629 struct sockaddr_in6 *sin6; 630 631 if (in6p->in6p_af != AF_INET6) 632 return; 633 634 nam->m_len = sizeof(*sin6); 635 sin6 = mtod(nam, struct sockaddr_in6 *); 636 sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0); 637 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 638 } 639 640 void 641 in6_setpeeraddr(struct in6pcb *in6p, struct mbuf *nam) 642 { 643 struct sockaddr_in6 *sin6; 644 645 if (in6p->in6p_af != AF_INET6) 646 return; 647 648 nam->m_len = sizeof(*sin6); 649 sin6 = mtod(nam, struct sockaddr_in6 *); 650 sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0); 651 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 652 } 653 654 /* 655 * Pass some notification to all connections of a protocol 656 * associated with address dst. The local address and/or port numbers 657 * may be specified to limit the search. The "usual action" will be 658 * taken, depending on the ctlinput cmd. The caller must filter any 659 * cmds that are uninteresting (e.g., no error in the map). 660 * Call the protocol specific routine (if any) to report 661 * any errors for each matching socket. 662 * 663 * Must be called at splsoftnet. 664 * 665 * Note: src (4th arg) carries the flowlabel value on the original IPv6 666 * header, in sin6_flowinfo member. 667 */ 668 int 669 in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst, 670 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd, 671 void *cmdarg, void (*notify)(struct in6pcb *, int)) 672 { 673 struct rtentry *rt; 674 struct inpcb_hdr *inph, *ninph; 675 struct sockaddr_in6 sa6_src; 676 const struct sockaddr_in6 *sa6_dst; 677 u_int16_t fport = fport_arg, lport = lport_arg; 678 int errno; 679 int nmatch = 0; 680 u_int32_t flowinfo; 681 682 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 683 return 0; 684 685 sa6_dst = (const struct sockaddr_in6 *)dst; 686 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 687 return 0; 688 689 /* 690 * note that src can be NULL when we get notify by local fragmentation. 691 */ 692 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 693 flowinfo = sa6_src.sin6_flowinfo; 694 695 /* 696 * Redirects go to all references to the destination, 697 * and use in6_rtchange to invalidate the route cache. 698 * Dead host indications: also use in6_rtchange to invalidate 699 * the cache, and deliver the error to all the sockets. 700 * Otherwise, if we have knowledge of the local port and address, 701 * deliver only to that socket. 702 */ 703 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 704 fport = 0; 705 lport = 0; 706 memset((void *)&sa6_src.sin6_addr, 0, sizeof(sa6_src.sin6_addr)); 707 708 if (cmd != PRC_HOSTDEAD) 709 notify = in6_rtchange; 710 } 711 712 errno = inet6ctlerrmap[cmd]; 713 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 714 struct in6pcb *in6p = (struct in6pcb *)inph; 715 if (in6p->in6p_af != AF_INET6) 716 continue; 717 718 /* 719 * Under the following condition, notify of redirects 720 * to the pcb, without making address matches against inpcb. 721 * - redirect notification is arrived. 722 * - the inpcb is unconnected. 723 * - the inpcb is caching !RTF_HOST routing entry. 724 * - the ICMPv6 notification is from the gateway cached in the 725 * inpcb. i.e. ICMPv6 notification is from nexthop gateway 726 * the inpcb used very recently. 727 * 728 * This is to improve interaction between netbsd/openbsd 729 * redirect handling code, and inpcb route cache code. 730 * without the clause, !RTF_HOST routing entry (which carries 731 * gateway used by inpcb right before the ICMPv6 redirect) 732 * will be cached forever in unconnected inpcb. 733 * 734 * There still is a question regarding to what is TRT: 735 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be 736 * generated on packet output. inpcb will always cache 737 * RTF_HOST routing entry so there's no need for the clause 738 * (ICMPv6 redirect will update RTF_HOST routing entry, 739 * and inpcb is caching it already). 740 * However, bsdi/freebsd are vulnerable to local DoS attacks 741 * due to the cloned routing entries. 742 * - Specwise, "destination cache" is mentioned in RFC2461. 743 * Jinmei says that it implies bsdi/freebsd behavior, itojun 744 * is not really convinced. 745 * - Having hiwat/lowat on # of cloned host route (redirect/ 746 * pmtud) may be a good idea. netbsd/openbsd has it. see 747 * icmp6_mtudisc_update(). 748 */ 749 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && 750 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 751 (rt = rtcache_validate(&in6p->in6p_route)) != NULL && 752 !(rt->rt_flags & RTF_HOST)) { 753 const struct sockaddr_in6 *dst6; 754 755 dst6 = (const struct sockaddr_in6 *) 756 rtcache_getdst(&in6p->in6p_route); 757 if (dst6 == NULL) 758 ; 759 else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, 760 &sa6_dst->sin6_addr)) 761 goto do_notify; 762 } 763 764 /* 765 * If the error designates a new path MTU for a destination 766 * and the application (associated with this socket) wanted to 767 * know the value, notify. Note that we notify for all 768 * disconnected sockets if the corresponding application 769 * wanted. This is because some UDP applications keep sending 770 * sockets disconnected. 771 * XXX: should we avoid to notify the value to TCP sockets? 772 */ 773 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 && 774 (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) || 775 IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) { 776 ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst, 777 (u_int32_t *)cmdarg); 778 } 779 780 /* 781 * Detect if we should notify the error. If no source and 782 * destination ports are specified, but non-zero flowinfo and 783 * local address match, notify the error. This is the case 784 * when the error is delivered with an encrypted buffer 785 * by ESP. Otherwise, just compare addresses and ports 786 * as usual. 787 */ 788 if (lport == 0 && fport == 0 && flowinfo && 789 in6p->in6p_socket != NULL && 790 flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 791 IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr)) 792 goto do_notify; 793 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 794 &sa6_dst->sin6_addr) || 795 in6p->in6p_socket == 0 || 796 (lport && in6p->in6p_lport != lport) || 797 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 798 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 799 &sa6_src.sin6_addr)) || 800 (fport && in6p->in6p_fport != fport)) 801 continue; 802 803 do_notify: 804 if (notify) 805 (*notify)(in6p, errno); 806 nmatch++; 807 } 808 return nmatch; 809 } 810 811 void 812 in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) 813 { 814 struct inpcb_hdr *inph, *ninph; 815 struct ip6_moptions *im6o; 816 struct in6_multi_mship *imm, *nimm; 817 818 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 819 struct in6pcb *in6p = (struct in6pcb *)inph; 820 if (in6p->in6p_af != AF_INET6) 821 continue; 822 823 im6o = in6p->in6p_moptions; 824 if (im6o) { 825 /* 826 * Unselect the outgoing interface if it is being 827 * detached. 828 */ 829 if (im6o->im6o_multicast_ifp == ifp) 830 im6o->im6o_multicast_ifp = NULL; 831 832 /* 833 * Drop multicast group membership if we joined 834 * through the interface being detached. 835 * XXX controversial - is it really legal for kernel 836 * to force this? 837 */ 838 for (imm = im6o->im6o_memberships.lh_first; 839 imm != NULL; imm = nimm) { 840 nimm = imm->i6mm_chain.le_next; 841 if (imm->i6mm_maddr->in6m_ifp == ifp) { 842 LIST_REMOVE(imm, i6mm_chain); 843 in6_leavegroup(imm); 844 } 845 } 846 } 847 } 848 } 849 850 void 851 in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) 852 { 853 struct rtentry *rt; 854 struct inpcb_hdr *inph, *ninph; 855 856 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 857 struct in6pcb *in6p = (struct in6pcb *)inph; 858 if (in6p->in6p_af != AF_INET6) 859 continue; 860 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL && 861 rt->rt_ifp == ifp) 862 in6_rtchange(in6p, 0); 863 } 864 } 865 866 /* 867 * Check for alternatives when higher level complains 868 * about service problems. For now, invalidate cached 869 * routing information. If the route was created dynamically 870 * (by a redirect), time to try a default gateway again. 871 */ 872 void 873 in6_losing(struct in6pcb *in6p) 874 { 875 struct rtentry *rt; 876 struct rt_addrinfo info; 877 878 if (in6p->in6p_af != AF_INET6) 879 return; 880 881 if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL) 882 return; 883 884 memset(&info, 0, sizeof(info)); 885 info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route); 886 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 887 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 888 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 889 if (rt->rt_flags & RTF_DYNAMIC) { 890 (void)rtrequest(RTM_DELETE, rt_getkey(rt), 891 rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL); 892 } 893 /* 894 * A new route can be allocated 895 * the next time output is attempted. 896 */ 897 rtcache_free(&in6p->in6p_route); 898 } 899 900 /* 901 * After a routing change, flush old routing. A new route can be 902 * allocated the next time output is attempted. 903 */ 904 void 905 in6_rtchange(struct in6pcb *in6p, int errno) 906 { 907 if (in6p->in6p_af != AF_INET6) 908 return; 909 910 rtcache_free(&in6p->in6p_route); 911 /* 912 * A new route can be allocated the next time 913 * output is attempted. 914 */ 915 } 916 917 struct in6pcb * 918 in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6, 919 u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp) 920 { 921 struct inpcbhead *head; 922 struct inpcb_hdr *inph; 923 struct in6pcb *in6p, *match = 0; 924 int matchwild = 3, wildcard; 925 u_int16_t lport = lport_arg; 926 927 if (vp) 928 vp->valid = 0; 929 930 head = IN6PCBHASH_PORT(table, lport); 931 LIST_FOREACH(inph, head, inph_lhash) { 932 in6p = (struct in6pcb *)inph; 933 if (in6p->in6p_af != AF_INET6) 934 continue; 935 936 if (in6p->in6p_lport != lport) 937 continue; 938 wildcard = 0; 939 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 940 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 941 continue; 942 } 943 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 944 wildcard++; 945 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 946 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 947 continue; 948 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 949 continue; 950 951 /* duplicate of IPv4 logic */ 952 wildcard = 0; 953 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) && 954 in6p->in6p_faddr.s6_addr32[3]) 955 wildcard++; 956 if (!in6p->in6p_laddr.s6_addr32[3]) { 957 if (laddr6->s6_addr32[3]) 958 wildcard++; 959 } else { 960 if (!laddr6->s6_addr32[3]) 961 wildcard++; 962 else { 963 if (in6p->in6p_laddr.s6_addr32[3] != 964 laddr6->s6_addr32[3]) 965 continue; 966 } 967 } 968 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 969 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 970 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 971 continue; 972 } 973 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 974 wildcard++; 975 } else { 976 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 977 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 978 continue; 979 } 980 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 981 wildcard++; 982 else { 983 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 984 laddr6)) 985 continue; 986 } 987 } 988 if (wildcard && !lookup_wildcard) 989 continue; 990 if (wildcard < matchwild) { 991 match = in6p; 992 matchwild = wildcard; 993 if (matchwild == 0) 994 break; 995 } 996 } 997 if (match && matchwild == 0) 998 return match; 999 1000 if (vp && table->vestige && table->vestige->init_ports6) { 1001 struct vestigial_inpcb better; 1002 void *state; 1003 1004 state = (*table->vestige->init_ports6)(laddr6, 1005 lport_arg, 1006 lookup_wildcard); 1007 while (table->vestige 1008 && (*table->vestige->next_port6)(state, vp)) { 1009 1010 if (vp->lport != lport) 1011 continue; 1012 wildcard = 0; 1013 if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6)) 1014 wildcard++; 1015 if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) { 1016 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1017 wildcard++; 1018 } else { 1019 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1020 if (vp->v6only) 1021 continue; 1022 } 1023 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1024 wildcard++; 1025 else { 1026 if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6)) 1027 continue; 1028 } 1029 } 1030 if (wildcard && !lookup_wildcard) 1031 continue; 1032 if (wildcard < matchwild) { 1033 better = *vp; 1034 match = (void*)&better; 1035 1036 matchwild = wildcard; 1037 if (matchwild == 0) 1038 break; 1039 } 1040 } 1041 1042 if (match) { 1043 if (match != (void*)&better) 1044 return match; 1045 else { 1046 *vp = better; 1047 return 0; 1048 } 1049 } 1050 } 1051 return (match); 1052 } 1053 1054 /* 1055 * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to 1056 * IPv4 mapped address. 1057 */ 1058 struct rtentry * 1059 in6_pcbrtentry(struct in6pcb *in6p) 1060 { 1061 struct rtentry *rt; 1062 struct route *ro; 1063 union { 1064 const struct sockaddr *sa; 1065 const struct sockaddr_in6 *sa6; 1066 #ifdef INET 1067 const struct sockaddr_in *sa4; 1068 #endif 1069 } cdst; 1070 1071 ro = &in6p->in6p_route; 1072 1073 if (in6p->in6p_af != AF_INET6) 1074 return (NULL); 1075 1076 cdst.sa = rtcache_getdst(ro); 1077 if (cdst.sa == NULL) 1078 ; 1079 #ifdef INET 1080 else if (cdst.sa->sa_family == AF_INET) { 1081 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)); 1082 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3]) 1083 rtcache_free(ro); 1084 } 1085 #endif 1086 else { 1087 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr, 1088 &in6p->in6p_faddr)) 1089 rtcache_free(ro); 1090 } 1091 if ((rt = rtcache_validate(ro)) == NULL) 1092 rt = rtcache_update(ro, 1); 1093 #ifdef INET 1094 if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 1095 union { 1096 struct sockaddr dst; 1097 struct sockaddr_in dst4; 1098 } u; 1099 struct in_addr addr; 1100 1101 addr.s_addr = in6p->in6p_faddr.s6_addr32[3]; 1102 1103 sockaddr_in_init(&u.dst4, &addr, 0); 1104 rtcache_setdst(ro, &u.dst); 1105 1106 rt = rtcache_init(ro); 1107 } else 1108 #endif 1109 if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 1110 union { 1111 struct sockaddr dst; 1112 struct sockaddr_in6 dst6; 1113 } u; 1114 1115 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0); 1116 rtcache_setdst(ro, &u.dst); 1117 1118 rt = rtcache_init(ro); 1119 } 1120 return rt; 1121 } 1122 1123 struct in6pcb * 1124 in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6, 1125 u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg, 1126 int faith, 1127 struct vestigial_inpcb *vp) 1128 { 1129 struct inpcbhead *head; 1130 struct inpcb_hdr *inph; 1131 struct in6pcb *in6p; 1132 u_int16_t fport = fport_arg, lport = lport_arg; 1133 1134 if (vp) 1135 vp->valid = 0; 1136 1137 head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport); 1138 LIST_FOREACH(inph, head, inph_hash) { 1139 in6p = (struct in6pcb *)inph; 1140 if (in6p->in6p_af != AF_INET6) 1141 continue; 1142 1143 /* find exact match on both source and dest */ 1144 if (in6p->in6p_fport != fport) 1145 continue; 1146 if (in6p->in6p_lport != lport) 1147 continue; 1148 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 1149 continue; 1150 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 1151 continue; 1152 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 1153 continue; 1154 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1155 continue; 1156 if ((IN6_IS_ADDR_V4MAPPED(laddr6) || 1157 IN6_IS_ADDR_V4MAPPED(faddr6)) && 1158 (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) 1159 continue; 1160 return in6p; 1161 } 1162 if (vp && table->vestige) { 1163 if ((*table->vestige->lookup6)(faddr6, fport_arg, 1164 laddr6, lport_arg, vp)) 1165 return 0; 1166 } 1167 1168 return NULL; 1169 } 1170 1171 struct in6pcb * 1172 in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6, 1173 u_int lport_arg, int faith) 1174 { 1175 struct inpcbhead *head; 1176 struct inpcb_hdr *inph; 1177 struct in6pcb *in6p; 1178 u_int16_t lport = lport_arg; 1179 #ifdef INET 1180 struct in6_addr zero_mapped; 1181 #endif 1182 1183 head = IN6PCBHASH_BIND(table, laddr6, lport); 1184 LIST_FOREACH(inph, head, inph_hash) { 1185 in6p = (struct in6pcb *)inph; 1186 if (in6p->in6p_af != AF_INET6) 1187 continue; 1188 1189 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1190 continue; 1191 if (in6p->in6p_fport != 0) 1192 continue; 1193 if (in6p->in6p_lport != lport) 1194 continue; 1195 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1196 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1197 continue; 1198 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1199 goto out; 1200 } 1201 #ifdef INET 1202 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1203 memset(&zero_mapped, 0, sizeof(zero_mapped)); 1204 zero_mapped.s6_addr16[5] = 0xffff; 1205 head = IN6PCBHASH_BIND(table, &zero_mapped, lport); 1206 LIST_FOREACH(inph, head, inph_hash) { 1207 in6p = (struct in6pcb *)inph; 1208 if (in6p->in6p_af != AF_INET6) 1209 continue; 1210 1211 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1212 continue; 1213 if (in6p->in6p_fport != 0) 1214 continue; 1215 if (in6p->in6p_lport != lport) 1216 continue; 1217 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1218 continue; 1219 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped)) 1220 goto out; 1221 } 1222 } 1223 #endif 1224 head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport); 1225 LIST_FOREACH(inph, head, inph_hash) { 1226 in6p = (struct in6pcb *)inph; 1227 if (in6p->in6p_af != AF_INET6) 1228 continue; 1229 1230 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1231 continue; 1232 if (in6p->in6p_fport != 0) 1233 continue; 1234 if (in6p->in6p_lport != lport) 1235 continue; 1236 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1237 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1238 continue; 1239 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr)) 1240 goto out; 1241 } 1242 return (NULL); 1243 1244 out: 1245 inph = &in6p->in6p_head; 1246 if (inph != LIST_FIRST(head)) { 1247 LIST_REMOVE(inph, inph_hash); 1248 LIST_INSERT_HEAD(head, inph, inph_hash); 1249 } 1250 return in6p; 1251 } 1252 1253 void 1254 in6_pcbstate(struct in6pcb *in6p, int state) 1255 { 1256 1257 if (in6p->in6p_af != AF_INET6) 1258 return; 1259 1260 if (in6p->in6p_state > IN6P_ATTACHED) 1261 LIST_REMOVE(&in6p->in6p_head, inph_hash); 1262 1263 switch (state) { 1264 case IN6P_BOUND: 1265 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table, 1266 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1267 inph_hash); 1268 break; 1269 case IN6P_CONNECTED: 1270 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table, 1271 &in6p->in6p_faddr, in6p->in6p_fport, 1272 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1273 inph_hash); 1274 break; 1275 } 1276 1277 in6p->in6p_state = state; 1278 } 1279
Indexes created Mon Oct 27 20:09:55 GMT 2025