in6_pcb.c revision 1.170
1 /* $NetBSD: in6_pcb.c,v 1.170 2022/08/29 09:14:02 knakahara 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 1.170 2022/08/29 09:14:02 knakahara Exp $"); 66 67 #ifdef _KERNEL_OPT 68 #include "opt_inet.h" 69 #include "opt_ipsec.h" 70 #endif 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/mbuf.h> 75 #include <sys/protosw.h> 76 #include <sys/socket.h> 77 #include <sys/socketvar.h> 78 #include <sys/ioctl.h> 79 #include <sys/errno.h> 80 #include <sys/time.h> 81 #include <sys/proc.h> 82 #include <sys/kauth.h> 83 #include <sys/domain.h> 84 #include <sys/once.h> 85 86 #include <net/if.h> 87 #include <net/route.h> 88 89 #include <netinet/in.h> 90 #include <netinet/in_var.h> 91 #include <netinet/in_systm.h> 92 #include <netinet/ip.h> 93 #include <netinet/in_pcb.h> 94 #include <netinet/ip6.h> 95 #include <netinet/portalgo.h> 96 #include <netinet6/ip6_var.h> 97 #include <netinet6/in6_pcb.h> 98 #include <netinet6/scope6_var.h> 99 100 #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 KASSERT(so->so_proto->pr_domain->dom_family == AF_INET6); 162 163 in6p = pool_get(&in6pcb_pool, PR_NOWAIT); 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 pool_put(&in6pcb_pool, in6p); 179 return error; 180 } 181 in6p->in6p_sp->sp_inph = (struct inpcb_hdr *)in6p; 182 } 183 #endif /* IPSEC */ 184 s = splsoftnet(); 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 int s; 205 206 /* 207 * We should check the family, but old programs 208 * incorrectly fail to initialize 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 s = pserialize_read_enter(); 222 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 223 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) { 224 error = EINVAL; 225 goto out; 226 } 227 if (sin6->sin6_addr.s6_addr32[3]) { 228 struct sockaddr_in sin; 229 230 memset(&sin, 0, sizeof(sin)); 231 sin.sin_len = sizeof(sin); 232 sin.sin_family = AF_INET; 233 bcopy(&sin6->sin6_addr.s6_addr32[3], 234 &sin.sin_addr, sizeof(sin.sin_addr)); 235 if (!IN_MULTICAST(sin.sin_addr.s_addr)) { 236 struct ifaddr *ifa; 237 ifa = ifa_ifwithaddr((struct sockaddr *)&sin); 238 if (ifa == NULL && 239 (in6p->in6p_flags & IN6P_BINDANY) == 0) { 240 error = EADDRNOTAVAIL; 241 goto out; 242 } 243 } 244 } 245 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 246 // succeed 247 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 248 struct ifaddr *ifa = NULL; 249 250 if ((in6p->in6p_flags & IN6P_FAITH) == 0) { 251 ifa = ifa_ifwithaddr(sin6tosa(sin6)); 252 if (ifa == NULL && 253 (in6p->in6p_flags & IN6P_BINDANY) == 0) { 254 error = EADDRNOTAVAIL; 255 goto out; 256 } 257 } 258 259 /* 260 * bind to an anycast address might accidentally 261 * cause sending a packet with an anycast source 262 * address, so we forbid it. 263 * 264 * We should allow to bind to a deprecated address, 265 * since the application dare to use it. 266 * But, can we assume that they are careful enough 267 * to check if the address is deprecated or not? 268 * Maybe, as a safeguard, we should have a setsockopt 269 * flag to control the bind(2) behavior against 270 * deprecated addresses (default: forbid bind(2)). 271 */ 272 if (ifa && 273 ifatoia6(ifa)->ia6_flags & 274 (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) { 275 error = EADDRNOTAVAIL; 276 goto out; 277 } 278 } 279 in6p->in6p_laddr = sin6->sin6_addr; 280 error = 0; 281 out: 282 pserialize_read_exit(s); 283 return error; 284 } 285 286 /* 287 * Bind port from sin6 to in6p. 288 */ 289 static int 290 in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 291 { 292 struct inpcbtable *table = in6p->in6p_table; 293 struct socket *so = in6p->in6p_socket; 294 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 295 int error; 296 297 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 298 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 299 (so->so_options & SO_ACCEPTCONN) == 0)) 300 wild = 1; 301 302 if (sin6->sin6_port != 0) { 303 enum kauth_network_req req; 304 305 #ifndef IPNOPRIVPORTS 306 if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED) 307 req = KAUTH_REQ_NETWORK_BIND_PRIVPORT; 308 else 309 #endif /* IPNOPRIVPORTS */ 310 req = KAUTH_REQ_NETWORK_BIND_PORT; 311 312 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND, 313 req, so, sin6, NULL); 314 if (error) 315 return (EACCES); 316 } 317 318 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 319 /* 320 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 321 * allow compepte duplication of binding if 322 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 323 * and a multicast address is bound on both 324 * new and duplicated sockets. 325 */ 326 if (so->so_options & (SO_REUSEADDR | SO_REUSEPORT)) 327 reuseport = SO_REUSEADDR|SO_REUSEPORT; 328 } 329 330 if (sin6->sin6_port != 0) { 331 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 332 #ifdef INET 333 struct inpcb *t; 334 struct vestigial_inpcb vestige; 335 336 t = in_pcblookup_port(table, 337 *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 338 sin6->sin6_port, wild, &vestige); 339 if (t && (reuseport & t->inp_socket->so_options) == 0) 340 return (EADDRINUSE); 341 if (!t 342 && vestige.valid 343 && !(reuseport && vestige.reuse_port)) 344 return EADDRINUSE; 345 #else 346 return (EADDRNOTAVAIL); 347 #endif 348 } 349 350 { 351 struct in6pcb *t; 352 struct vestigial_inpcb vestige; 353 354 t = in6_pcblookup_port(table, &sin6->sin6_addr, 355 sin6->sin6_port, wild, &vestige); 356 if (t && (reuseport & t->in6p_socket->so_options) == 0) 357 return (EADDRINUSE); 358 if (!t 359 && vestige.valid 360 && !(reuseport && vestige.reuse_port)) 361 return EADDRINUSE; 362 } 363 } 364 365 if (sin6->sin6_port == 0) { 366 int e; 367 e = in6_pcbsetport(sin6, in6p, l); 368 if (e != 0) 369 return (e); 370 } else { 371 in6p->in6p_lport = sin6->sin6_port; 372 in6_pcbstate(in6p, IN6P_BOUND); 373 } 374 375 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 376 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 377 &in6p->in6p_head, inph_lhash); 378 379 return (0); 380 } 381 382 int 383 in6_pcbbind(void *v, struct sockaddr_in6 *sin6, struct lwp *l) 384 { 385 struct in6pcb *in6p = v; 386 struct sockaddr_in6 lsin6; 387 int error; 388 389 if (in6p->in6p_af != AF_INET6) 390 return (EINVAL); 391 392 /* 393 * If we already have a local port or a local address it means we're 394 * bounded. 395 */ 396 if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 397 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 398 in6p->in6p_laddr.s6_addr32[3] == 0))) 399 return (EINVAL); 400 401 if (NULL != sin6) { 402 /* We were provided a sockaddr_in6 to use. */ 403 if (sin6->sin6_len != sizeof(*sin6)) 404 return (EINVAL); 405 } else { 406 /* We always bind to *something*, even if it's "anything". */ 407 lsin6 = *((const struct sockaddr_in6 *) 408 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 409 sin6 = &lsin6; 410 } 411 412 /* Bind address. */ 413 error = in6_pcbbind_addr(in6p, sin6, l); 414 if (error) 415 return (error); 416 417 /* Bind port. */ 418 error = in6_pcbbind_port(in6p, sin6, l); 419 if (error) { 420 /* 421 * Reset the address here to "any" so we don't "leak" the 422 * in6pcb. 423 */ 424 in6p->in6p_laddr = in6addr_any; 425 426 return (error); 427 } 428 429 430 #if 0 431 in6p->in6p_flowinfo = 0; /* XXX */ 432 #endif 433 return (0); 434 } 435 436 /* 437 * Connect from a socket to a specified address. 438 * Both address and port must be specified in argument sin6. 439 * If don't have a local address for this socket yet, 440 * then pick one. 441 */ 442 int 443 in6_pcbconnect(void *v, struct sockaddr_in6 *sin6, struct lwp *l) 444 { 445 struct in6pcb *in6p = v; 446 struct in6_addr *in6a = NULL; 447 struct in6_addr ia6; 448 struct ifnet *ifp = NULL; /* outgoing interface */ 449 int error = 0; 450 int scope_ambiguous = 0; 451 #ifdef INET 452 struct in6_addr mapped; 453 #endif 454 struct sockaddr_in6 tmp; 455 struct vestigial_inpcb vestige; 456 struct psref psref; 457 int bound; 458 459 (void)&in6a; /* XXX fool gcc */ 460 461 if (in6p->in6p_af != AF_INET6) 462 return (EINVAL); 463 464 if (sin6->sin6_len != sizeof(*sin6)) 465 return (EINVAL); 466 if (sin6->sin6_family != AF_INET6) 467 return (EAFNOSUPPORT); 468 if (sin6->sin6_port == 0) 469 return (EADDRNOTAVAIL); 470 471 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 472 in6p->in6p_socket->so_type == SOCK_STREAM) 473 return EADDRNOTAVAIL; 474 475 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) 476 scope_ambiguous = 1; 477 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 478 return(error); 479 480 /* sanity check for mapped address case */ 481 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 482 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 483 return EINVAL; 484 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 485 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 486 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 487 return EINVAL; 488 } else 489 { 490 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 491 return EINVAL; 492 } 493 494 /* protect *sin6 from overwrites */ 495 tmp = *sin6; 496 sin6 = &tmp; 497 498 bound = curlwp_bind(); 499 /* Source address selection. */ 500 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 501 in6p->in6p_laddr.s6_addr32[3] == 0) { 502 #ifdef INET 503 struct sockaddr_in sin; 504 struct in_ifaddr *ia4; 505 struct psref _psref; 506 507 memset(&sin, 0, sizeof(sin)); 508 sin.sin_len = sizeof(sin); 509 sin.sin_family = AF_INET; 510 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3], 511 sizeof(sin.sin_addr)); 512 ia4 = in_selectsrc(&sin, &in6p->in6p_route, 513 in6p->in6p_socket->so_options, NULL, &error, &_psref); 514 if (ia4 == NULL) { 515 if (error == 0) 516 error = EADDRNOTAVAIL; 517 curlwp_bindx(bound); 518 return (error); 519 } 520 memset(&mapped, 0, sizeof(mapped)); 521 mapped.s6_addr16[5] = htons(0xffff); 522 memcpy(&mapped.s6_addr32[3], &IA_SIN(ia4)->sin_addr, 523 sizeof(IA_SIN(ia4)->sin_addr)); 524 ia4_release(ia4, &_psref); 525 in6a = &mapped; 526 #else 527 curlwp_bindx(bound); 528 return EADDRNOTAVAIL; 529 #endif 530 } else { 531 /* 532 * XXX: in6_selectsrc might replace the bound local address 533 * with the address specified by setsockopt(IPV6_PKTINFO). 534 * Is it the intended behavior? 535 */ 536 error = in6_selectsrc(sin6, in6p->in6p_outputopts, 537 in6p->in6p_moptions, &in6p->in6p_route, &in6p->in6p_laddr, 538 &ifp, &psref, &ia6); 539 if (error == 0) 540 in6a = &ia6; 541 if (ifp && scope_ambiguous && 542 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 543 if_put(ifp, &psref); 544 curlwp_bindx(bound); 545 return error; 546 } 547 548 if (in6a == NULL) { 549 if_put(ifp, &psref); 550 curlwp_bindx(bound); 551 if (error == 0) 552 error = EADDRNOTAVAIL; 553 return error; 554 } 555 } 556 557 if (ifp != NULL) { 558 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 559 if_put(ifp, &psref); 560 } else 561 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim_rt(in6p); 562 curlwp_bindx(bound); 563 564 if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr, 565 sin6->sin6_port, 566 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr, 567 in6p->in6p_lport, 0, &vestige) 568 || vestige.valid) 569 return (EADDRINUSE); 570 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 571 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 572 in6p->in6p_laddr.s6_addr32[3] == 0)) 573 { 574 if (in6p->in6p_lport == 0) { 575 error = in6_pcbbind(in6p, NULL, l); 576 if (error != 0) 577 return error; 578 } 579 in6p->in6p_laddr = *in6a; 580 } 581 in6p->in6p_faddr = sin6->sin6_addr; 582 in6p->in6p_fport = sin6->sin6_port; 583 584 /* Late bind, if needed */ 585 if (in6p->in6p_bindportonsend) { 586 struct sockaddr_in6 lsin = *((const struct sockaddr_in6 *) 587 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 588 lsin.sin6_addr = in6p->in6p_laddr; 589 lsin.sin6_port = 0; 590 591 if ((error = in6_pcbbind_port(in6p, &lsin, l)) != 0) 592 return error; 593 } 594 595 in6_pcbstate(in6p, IN6P_CONNECTED); 596 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 597 if (ip6_auto_flowlabel) 598 in6p->in6p_flowinfo |= 599 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 600 #if defined(IPSEC) 601 if (ipsec_enabled && in6p->in6p_socket->so_type == SOCK_STREAM) 602 ipsec_pcbconn(in6p->in6p_sp); 603 #endif 604 return (0); 605 } 606 607 void 608 in6_pcbdisconnect(struct in6pcb *in6p) 609 { 610 memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr)); 611 in6p->in6p_fport = 0; 612 in6_pcbstate(in6p, IN6P_BOUND); 613 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 614 #if defined(IPSEC) 615 if (ipsec_enabled) 616 ipsec_pcbdisconn(in6p->in6p_sp); 617 #endif 618 if (in6p->in6p_socket->so_state & SS_NOFDREF) 619 in6_pcbdetach(in6p); 620 } 621 622 void 623 in6_pcbdetach(struct in6pcb *in6p) 624 { 625 struct socket *so = in6p->in6p_socket; 626 int s; 627 628 if (in6p->in6p_af != AF_INET6) 629 return; 630 631 #if defined(IPSEC) 632 if (ipsec_enabled) 633 ipsec_delete_pcbpolicy(in6p); 634 #endif 635 so->so_pcb = NULL; 636 637 s = splsoftnet(); 638 in6_pcbstate(in6p, IN6P_ATTACHED); 639 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 640 TAILQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head, 641 inph_queue); 642 splx(s); 643 644 if (in6p->in6p_options) { 645 m_freem(in6p->in6p_options); 646 } 647 if (in6p->in6p_outputopts != NULL) { 648 ip6_clearpktopts(in6p->in6p_outputopts, -1); 649 free(in6p->in6p_outputopts, M_IP6OPT); 650 } 651 rtcache_free(&in6p->in6p_route); 652 ip6_freemoptions(in6p->in6p_moptions); 653 ip_freemoptions(in6p->in6p_v4moptions); 654 sofree(so); /* drops the socket's lock */ 655 656 pool_put(&in6pcb_pool, in6p); 657 mutex_enter(softnet_lock); /* reacquire it */ 658 } 659 660 void 661 in6_setsockaddr(struct in6pcb *in6p, struct sockaddr_in6 *sin6) 662 { 663 664 if (in6p->in6p_af != AF_INET6) 665 return; 666 667 sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0); 668 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 669 } 670 671 void 672 in6_setpeeraddr(struct in6pcb *in6p, struct sockaddr_in6 *sin6) 673 { 674 675 if (in6p->in6p_af != AF_INET6) 676 return; 677 678 sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0); 679 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 680 } 681 682 /* 683 * Pass some notification to all connections of a protocol 684 * associated with address dst. The local address and/or port numbers 685 * may be specified to limit the search. The "usual action" will be 686 * taken, depending on the ctlinput cmd. The caller must filter any 687 * cmds that are uninteresting (e.g., no error in the map). 688 * Call the protocol specific routine (if any) to report 689 * any errors for each matching socket. 690 * 691 * Must be called at splsoftnet. 692 * 693 * Note: src (4th arg) carries the flowlabel value on the original IPv6 694 * header, in sin6_flowinfo member. 695 */ 696 int 697 in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst, 698 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd, 699 void *cmdarg, void (*notify)(struct in6pcb *, int)) 700 { 701 struct inpcb_hdr *inph; 702 struct sockaddr_in6 sa6_src; 703 const struct sockaddr_in6 *sa6_dst; 704 u_int16_t fport = fport_arg, lport = lport_arg; 705 int errno; 706 int nmatch = 0; 707 u_int32_t flowinfo; 708 709 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 710 return 0; 711 712 sa6_dst = (const struct sockaddr_in6 *)dst; 713 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 714 return 0; 715 716 /* 717 * note that src can be NULL when we get notify by local fragmentation. 718 */ 719 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 720 flowinfo = sa6_src.sin6_flowinfo; 721 722 /* 723 * Redirects go to all references to the destination, 724 * and use in6_rtchange to invalidate the route cache. 725 * Dead host indications: also use in6_rtchange to invalidate 726 * the cache, and deliver the error to all the sockets. 727 * Otherwise, if we have knowledge of the local port and address, 728 * deliver only to that socket. 729 */ 730 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 731 fport = 0; 732 lport = 0; 733 memset((void *)&sa6_src.sin6_addr, 0, sizeof(sa6_src.sin6_addr)); 734 735 if (cmd != PRC_HOSTDEAD) 736 notify = in6_rtchange; 737 } 738 739 errno = inet6ctlerrmap[cmd]; 740 TAILQ_FOREACH(inph, &table->inpt_queue, inph_queue) { 741 struct in6pcb *in6p = (struct in6pcb *)inph; 742 struct rtentry *rt = NULL; 743 744 if (in6p->in6p_af != AF_INET6) 745 continue; 746 747 /* 748 * Under the following condition, notify of redirects 749 * to the pcb, without making address matches against inpcb. 750 * - redirect notification is arrived. 751 * - the inpcb is unconnected. 752 * - the inpcb is caching !RTF_HOST routing entry. 753 * - the ICMPv6 notification is from the gateway cached in the 754 * inpcb. i.e. ICMPv6 notification is from nexthop gateway 755 * the inpcb used very recently. 756 * 757 * This is to improve interaction between netbsd/openbsd 758 * redirect handling code, and inpcb route cache code. 759 * without the clause, !RTF_HOST routing entry (which carries 760 * gateway used by inpcb right before the ICMPv6 redirect) 761 * will be cached forever in unconnected inpcb. 762 * 763 * There still is a question regarding to what is TRT: 764 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be 765 * generated on packet output. inpcb will always cache 766 * RTF_HOST routing entry so there's no need for the clause 767 * (ICMPv6 redirect will update RTF_HOST routing entry, 768 * and inpcb is caching it already). 769 * However, bsdi/freebsd are vulnerable to local DoS attacks 770 * due to the cloned routing entries. 771 * - Specwise, "destination cache" is mentioned in RFC2461. 772 * Jinmei says that it implies bsdi/freebsd behavior, itojun 773 * is not really convinced. 774 * - Having hiwat/lowat on # of cloned host route (redirect/ 775 * pmtud) may be a good idea. netbsd/openbsd has it. see 776 * icmp6_mtudisc_update(). 777 */ 778 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && 779 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 780 (rt = rtcache_validate(&in6p->in6p_route)) != NULL && 781 !(rt->rt_flags & RTF_HOST)) { 782 const struct sockaddr_in6 *dst6; 783 784 dst6 = (const struct sockaddr_in6 *) 785 rtcache_getdst(&in6p->in6p_route); 786 if (dst6 == NULL) 787 ; 788 else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, 789 &sa6_dst->sin6_addr)) { 790 rtcache_unref(rt, &in6p->in6p_route); 791 goto do_notify; 792 } 793 } 794 rtcache_unref(rt, &in6p->in6p_route); 795 796 /* 797 * If the error designates a new path MTU for a destination 798 * and the application (associated with this socket) wanted to 799 * know the value, notify. Note that we notify for all 800 * disconnected sockets if the corresponding application 801 * wanted. This is because some UDP applications keep sending 802 * sockets disconnected. 803 * XXX: should we avoid to notify the value to TCP sockets? 804 */ 805 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 && 806 (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) || 807 IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) { 808 ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst, 809 (u_int32_t *)cmdarg); 810 } 811 812 /* 813 * Detect if we should notify the error. If no source and 814 * destination ports are specified, but non-zero flowinfo and 815 * local address match, notify the error. This is the case 816 * when the error is delivered with an encrypted buffer 817 * by ESP. Otherwise, just compare addresses and ports 818 * as usual. 819 */ 820 if (lport == 0 && fport == 0 && flowinfo && 821 in6p->in6p_socket != NULL && 822 flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 823 IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr)) 824 goto do_notify; 825 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 826 &sa6_dst->sin6_addr) || 827 in6p->in6p_socket == NULL || 828 (lport && in6p->in6p_lport != lport) || 829 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 830 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 831 &sa6_src.sin6_addr)) || 832 (fport && in6p->in6p_fport != fport)) 833 continue; 834 835 do_notify: 836 if (notify) 837 (*notify)(in6p, errno); 838 nmatch++; 839 } 840 return nmatch; 841 } 842 843 void 844 in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) 845 { 846 struct inpcb_hdr *inph; 847 struct ip6_moptions *im6o; 848 struct in6_multi_mship *imm, *nimm; 849 850 KASSERT(ifp != NULL); 851 852 TAILQ_FOREACH(inph, &table->inpt_queue, inph_queue) { 853 struct in6pcb *in6p = (struct in6pcb *)inph; 854 bool need_unlock = false; 855 if (in6p->in6p_af != AF_INET6) 856 continue; 857 858 /* The caller holds either one of in6ps' lock */ 859 if (!in6p_locked(in6p)) { 860 in6p_lock(in6p); 861 need_unlock = true; 862 } 863 im6o = in6p->in6p_moptions; 864 if (im6o) { 865 /* 866 * Unselect the outgoing interface if it is being 867 * detached. 868 */ 869 if (im6o->im6o_multicast_if_index == ifp->if_index) 870 im6o->im6o_multicast_if_index = 0; 871 872 /* 873 * Drop multicast group membership if we joined 874 * through the interface being detached. 875 * XXX controversial - is it really legal for kernel 876 * to force this? 877 */ 878 LIST_FOREACH_SAFE(imm, &im6o->im6o_memberships, 879 i6mm_chain, nimm) { 880 if (imm->i6mm_maddr->in6m_ifp == ifp) { 881 LIST_REMOVE(imm, i6mm_chain); 882 in6_leavegroup(imm); 883 } 884 } 885 } 886 887 in_purgeifmcast(in6p->in6p_v4moptions, ifp); 888 889 if (need_unlock) 890 in6p_unlock(in6p); 891 } 892 } 893 894 void 895 in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) 896 { 897 struct rtentry *rt; 898 struct inpcb_hdr *inph; 899 900 TAILQ_FOREACH(inph, &table->inpt_queue, inph_queue) { 901 struct in6pcb *in6p = (struct in6pcb *)inph; 902 if (in6p->in6p_af != AF_INET6) 903 continue; 904 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL && 905 rt->rt_ifp == ifp) { 906 rtcache_unref(rt, &in6p->in6p_route); 907 in6_rtchange(in6p, 0); 908 } else 909 rtcache_unref(rt, &in6p->in6p_route); 910 } 911 } 912 913 /* 914 * Check for alternatives when higher level complains 915 * about service problems. For now, invalidate cached 916 * routing information. If the route was created dynamically 917 * (by a redirect), time to try a default gateway again. 918 */ 919 void 920 in6_losing(struct in6pcb *in6p) 921 { 922 struct rtentry *rt; 923 struct rt_addrinfo info; 924 925 if (in6p->in6p_af != AF_INET6) 926 return; 927 928 if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL) 929 return; 930 931 memset(&info, 0, sizeof(info)); 932 info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route); 933 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 934 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 935 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 936 if (rt->rt_flags & RTF_DYNAMIC) { 937 int error; 938 struct rtentry *nrt; 939 940 error = rtrequest(RTM_DELETE, rt_getkey(rt), 941 rt->rt_gateway, rt_mask(rt), rt->rt_flags, &nrt); 942 rtcache_unref(rt, &in6p->in6p_route); 943 if (error == 0) { 944 rt_newmsg_dynamic(RTM_DELETE, nrt); 945 rt_free(nrt); 946 } 947 } else 948 rtcache_unref(rt, &in6p->in6p_route); 949 /* 950 * A new route can be allocated 951 * the next time output is attempted. 952 */ 953 rtcache_free(&in6p->in6p_route); 954 } 955 956 /* 957 * After a routing change, flush old routing. A new route can be 958 * allocated the next time output is attempted. 959 */ 960 void 961 in6_rtchange(struct in6pcb *in6p, int errno) 962 { 963 if (in6p->in6p_af != AF_INET6) 964 return; 965 966 rtcache_free(&in6p->in6p_route); 967 /* 968 * A new route can be allocated the next time 969 * output is attempted. 970 */ 971 } 972 973 struct in6pcb * 974 in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6, 975 u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp) 976 { 977 struct inpcbhead *head; 978 struct inpcb_hdr *inph; 979 struct in6pcb *in6p, *match = NULL; 980 int matchwild = 3, wildcard; 981 u_int16_t lport = lport_arg; 982 983 if (vp) 984 vp->valid = 0; 985 986 head = IN6PCBHASH_PORT(table, lport); 987 LIST_FOREACH(inph, head, inph_lhash) { 988 in6p = (struct in6pcb *)inph; 989 if (in6p->in6p_af != AF_INET6) 990 continue; 991 992 if (in6p->in6p_lport != lport) 993 continue; 994 wildcard = 0; 995 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 996 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 997 continue; 998 } 999 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 1000 wildcard++; 1001 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 1002 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1003 continue; 1004 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 1005 continue; 1006 1007 /* duplicate of IPv4 logic */ 1008 wildcard = 0; 1009 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) && 1010 in6p->in6p_faddr.s6_addr32[3]) 1011 wildcard++; 1012 if (!in6p->in6p_laddr.s6_addr32[3]) { 1013 if (laddr6->s6_addr32[3]) 1014 wildcard++; 1015 } else { 1016 if (!laddr6->s6_addr32[3]) 1017 wildcard++; 1018 else { 1019 if (in6p->in6p_laddr.s6_addr32[3] != 1020 laddr6->s6_addr32[3]) 1021 continue; 1022 } 1023 } 1024 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 1025 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1026 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1027 continue; 1028 } 1029 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1030 wildcard++; 1031 } else { 1032 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1033 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1034 continue; 1035 } 1036 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1037 wildcard++; 1038 else { 1039 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 1040 laddr6)) 1041 continue; 1042 } 1043 } 1044 if (wildcard && !lookup_wildcard) 1045 continue; 1046 if (wildcard < matchwild) { 1047 match = in6p; 1048 matchwild = wildcard; 1049 if (matchwild == 0) 1050 break; 1051 } 1052 } 1053 if (match && matchwild == 0) 1054 return match; 1055 1056 if (vp && table->vestige && table->vestige->init_ports6) { 1057 struct vestigial_inpcb better; 1058 void *state; 1059 1060 state = (*table->vestige->init_ports6)(laddr6, 1061 lport_arg, 1062 lookup_wildcard); 1063 while (table->vestige 1064 && (*table->vestige->next_port6)(state, vp)) { 1065 1066 if (vp->lport != lport) 1067 continue; 1068 wildcard = 0; 1069 if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6)) 1070 wildcard++; 1071 if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) { 1072 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1073 wildcard++; 1074 } else { 1075 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1076 if (vp->v6only) 1077 continue; 1078 } 1079 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1080 wildcard++; 1081 else { 1082 if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6)) 1083 continue; 1084 } 1085 } 1086 if (wildcard && !lookup_wildcard) 1087 continue; 1088 if (wildcard < matchwild) { 1089 better = *vp; 1090 match = (void*)&better; 1091 1092 matchwild = wildcard; 1093 if (matchwild == 0) 1094 break; 1095 } 1096 } 1097 1098 if (match) { 1099 if (match != (void*)&better) 1100 return match; 1101 else { 1102 *vp = better; 1103 return 0; 1104 } 1105 } 1106 } 1107 return (match); 1108 } 1109 1110 /* 1111 * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to 1112 * IPv4 mapped address. 1113 */ 1114 struct rtentry * 1115 in6_pcbrtentry(struct in6pcb *in6p) 1116 { 1117 struct rtentry *rt; 1118 struct route *ro; 1119 union { 1120 const struct sockaddr *sa; 1121 const struct sockaddr_in6 *sa6; 1122 #ifdef INET 1123 const struct sockaddr_in *sa4; 1124 #endif 1125 } cdst; 1126 1127 ro = &in6p->in6p_route; 1128 1129 if (in6p->in6p_af != AF_INET6) 1130 return (NULL); 1131 1132 cdst.sa = rtcache_getdst(ro); 1133 if (cdst.sa == NULL) 1134 ; 1135 #ifdef INET 1136 else if (cdst.sa->sa_family == AF_INET) { 1137 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)); 1138 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3]) 1139 rtcache_free(ro); 1140 } 1141 #endif 1142 else { 1143 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr, 1144 &in6p->in6p_faddr)) 1145 rtcache_free(ro); 1146 } 1147 if ((rt = rtcache_validate(ro)) == NULL) 1148 rt = rtcache_update(ro, 1); 1149 #ifdef INET 1150 if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 1151 union { 1152 struct sockaddr dst; 1153 struct sockaddr_in dst4; 1154 } u; 1155 struct in_addr addr; 1156 1157 addr.s_addr = in6p->in6p_faddr.s6_addr32[3]; 1158 1159 sockaddr_in_init(&u.dst4, &addr, 0); 1160 if (rtcache_setdst(ro, &u.dst) != 0) 1161 return NULL; 1162 1163 rt = rtcache_init(ro); 1164 } else 1165 #endif 1166 if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 1167 union { 1168 struct sockaddr dst; 1169 struct sockaddr_in6 dst6; 1170 } u; 1171 1172 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0); 1173 if (rtcache_setdst(ro, &u.dst) != 0) 1174 return NULL; 1175 1176 rt = rtcache_init(ro); 1177 } 1178 return rt; 1179 } 1180 1181 void 1182 in6_pcbrtentry_unref(struct rtentry *rt, struct in6pcb *in6p) 1183 { 1184 1185 rtcache_unref(rt, &in6p->in6p_route); 1186 } 1187 1188 struct in6pcb * 1189 in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6, 1190 u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg, 1191 int faith, 1192 struct vestigial_inpcb *vp) 1193 { 1194 struct inpcbhead *head; 1195 struct inpcb_hdr *inph; 1196 struct in6pcb *in6p; 1197 u_int16_t fport = fport_arg, lport = lport_arg; 1198 1199 if (vp) 1200 vp->valid = 0; 1201 1202 head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport); 1203 LIST_FOREACH(inph, head, inph_hash) { 1204 in6p = (struct in6pcb *)inph; 1205 if (in6p->in6p_af != AF_INET6) 1206 continue; 1207 1208 /* find exact match on both source and dest */ 1209 if (in6p->in6p_fport != fport) 1210 continue; 1211 if (in6p->in6p_lport != lport) 1212 continue; 1213 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 1214 continue; 1215 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 1216 continue; 1217 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 1218 continue; 1219 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1220 continue; 1221 if ((IN6_IS_ADDR_V4MAPPED(laddr6) || 1222 IN6_IS_ADDR_V4MAPPED(faddr6)) && 1223 (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) 1224 continue; 1225 return in6p; 1226 } 1227 if (vp && table->vestige) { 1228 if ((*table->vestige->lookup6)(faddr6, fport_arg, 1229 laddr6, lport_arg, vp)) 1230 return NULL; 1231 } 1232 1233 return NULL; 1234 } 1235 1236 struct in6pcb * 1237 in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6, 1238 u_int lport_arg, int faith) 1239 { 1240 struct inpcbhead *head; 1241 struct inpcb_hdr *inph; 1242 struct in6pcb *in6p; 1243 u_int16_t lport = lport_arg; 1244 #ifdef INET 1245 struct in6_addr zero_mapped; 1246 #endif 1247 1248 head = IN6PCBHASH_BIND(table, laddr6, lport); 1249 LIST_FOREACH(inph, head, inph_hash) { 1250 in6p = (struct in6pcb *)inph; 1251 if (in6p->in6p_af != AF_INET6) 1252 continue; 1253 1254 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1255 continue; 1256 if (in6p->in6p_fport != 0) 1257 continue; 1258 if (in6p->in6p_lport != lport) 1259 continue; 1260 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1261 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1262 continue; 1263 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1264 goto out; 1265 } 1266 #ifdef INET 1267 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1268 memset(&zero_mapped, 0, sizeof(zero_mapped)); 1269 zero_mapped.s6_addr16[5] = 0xffff; 1270 head = IN6PCBHASH_BIND(table, &zero_mapped, lport); 1271 LIST_FOREACH(inph, head, inph_hash) { 1272 in6p = (struct in6pcb *)inph; 1273 if (in6p->in6p_af != AF_INET6) 1274 continue; 1275 1276 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1277 continue; 1278 if (in6p->in6p_fport != 0) 1279 continue; 1280 if (in6p->in6p_lport != lport) 1281 continue; 1282 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1283 continue; 1284 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped)) 1285 goto out; 1286 } 1287 } 1288 #endif 1289 head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport); 1290 LIST_FOREACH(inph, head, inph_hash) { 1291 in6p = (struct in6pcb *)inph; 1292 if (in6p->in6p_af != AF_INET6) 1293 continue; 1294 1295 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1296 continue; 1297 if (in6p->in6p_fport != 0) 1298 continue; 1299 if (in6p->in6p_lport != lport) 1300 continue; 1301 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1302 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1303 continue; 1304 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr)) 1305 goto out; 1306 } 1307 return (NULL); 1308 1309 out: 1310 inph = &in6p->in6p_head; 1311 if (inph != LIST_FIRST(head)) { 1312 LIST_REMOVE(inph, inph_hash); 1313 LIST_INSERT_HEAD(head, inph, inph_hash); 1314 } 1315 return in6p; 1316 } 1317 1318 void 1319 in6_pcbstate(struct in6pcb *in6p, int state) 1320 { 1321 1322 if (in6p->in6p_af != AF_INET6) 1323 return; 1324 1325 if (in6p->in6p_state > IN6P_ATTACHED) 1326 LIST_REMOVE(&in6p->in6p_head, inph_hash); 1327 1328 switch (state) { 1329 case IN6P_BOUND: 1330 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table, 1331 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1332 inph_hash); 1333 break; 1334 case IN6P_CONNECTED: 1335 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table, 1336 &in6p->in6p_faddr, in6p->in6p_fport, 1337 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1338 inph_hash); 1339 break; 1340 } 1341 1342 in6p->in6p_state = state; 1343 } 1344
Indexes created Thu Sep 25 16:09:42 GMT 2025