in6_pcb.c revision 1.140
1 /* $NetBSD: in6_pcb.c,v 1.140 2015/05/02 17:18:03 rtr 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 1.140 2015/05/02 17:18:03 rtr 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 (!IN_MULTICAST(sin.sin_addr.s_addr) && 232 ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 233 return EADDRNOTAVAIL; 234 } 235 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 236 // succeed 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 | SO_REUSEPORT)) 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 = in_pcblookup_port(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 sockaddr_in6 *sin6, struct lwp *l) 368 { 369 struct in6pcb *in6p = v; 370 struct sockaddr_in6 lsin6; 371 int error; 372 373 if (in6p->in6p_af != AF_INET6) 374 return (EINVAL); 375 376 /* 377 * If we already have a local port or a local address it means we're 378 * bounded. 379 */ 380 if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 381 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 382 in6p->in6p_laddr.s6_addr32[3] == 0))) 383 return (EINVAL); 384 385 if (NULL != sin6) { 386 /* We were provided a sockaddr_in6 to use. */ 387 if (sin6->sin6_len != sizeof(*sin6)) 388 return (EINVAL); 389 } else { 390 /* We always bind to *something*, even if it's "anything". */ 391 lsin6 = *((const struct sockaddr_in6 *) 392 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 393 sin6 = &lsin6; 394 } 395 396 /* Bind address. */ 397 error = in6_pcbbind_addr(in6p, sin6, l); 398 if (error) 399 return (error); 400 401 /* Bind port. */ 402 error = in6_pcbbind_port(in6p, sin6, l); 403 if (error) { 404 /* 405 * Reset the address here to "any" so we don't "leak" the 406 * in6pcb. 407 */ 408 in6p->in6p_laddr = in6addr_any; 409 410 return (error); 411 } 412 413 414 #if 0 415 in6p->in6p_flowinfo = 0; /* XXX */ 416 #endif 417 return (0); 418 } 419 420 /* 421 * adapter function that accepts nam as mbuf for in6_pcbconnect 422 */ 423 int 424 in6_pcbconnect_m(void *v, struct mbuf *nam, struct lwp *l) 425 { 426 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 427 428 if (sizeof (*sin6) != nam->m_len) { 429 return EINVAL; 430 } 431 432 return in6_pcbconnect(v, sin6, l); 433 } 434 435 /* 436 * Connect from a socket to a specified address. 437 * Both address and port must be specified in argument sin6. 438 * If don't have a local address for this socket yet, 439 * then pick one. 440 */ 441 int 442 in6_pcbconnect(void *v, struct sockaddr_in6 *sin6, struct lwp *l) 443 { 444 struct in6pcb *in6p = v; 445 struct in6_addr *in6a = NULL; 446 struct ifnet *ifp = NULL; /* outgoing interface */ 447 int error = 0; 448 int scope_ambiguous = 0; 449 #ifdef INET 450 struct in6_addr mapped; 451 #endif 452 struct sockaddr_in6 tmp; 453 struct vestigial_inpcb vestige; 454 455 (void)&in6a; /* XXX fool gcc */ 456 457 if (in6p->in6p_af != AF_INET6) 458 return (EINVAL); 459 460 if (sin6->sin6_len != sizeof(*sin6)) 461 return (EINVAL); 462 if (sin6->sin6_family != AF_INET6) 463 return (EAFNOSUPPORT); 464 if (sin6->sin6_port == 0) 465 return (EADDRNOTAVAIL); 466 467 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 468 in6p->in6p_socket->so_type == SOCK_STREAM) 469 return EADDRNOTAVAIL; 470 471 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) 472 scope_ambiguous = 1; 473 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 474 return(error); 475 476 /* sanity check for mapped address case */ 477 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 478 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 479 return EINVAL; 480 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 481 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 482 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 483 return EINVAL; 484 } else 485 { 486 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 487 return EINVAL; 488 } 489 490 /* protect *sin6 from overwrites */ 491 tmp = *sin6; 492 sin6 = &tmp; 493 494 /* Source address selection. */ 495 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 496 in6p->in6p_laddr.s6_addr32[3] == 0) { 497 #ifdef INET 498 struct sockaddr_in sin, *sinp; 499 500 memset(&sin, 0, sizeof(sin)); 501 sin.sin_len = sizeof(sin); 502 sin.sin_family = AF_INET; 503 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3], 504 sizeof(sin.sin_addr)); 505 sinp = in_selectsrc(&sin, &in6p->in6p_route, 506 in6p->in6p_socket->so_options, NULL, &error); 507 if (sinp == 0) { 508 if (error == 0) 509 error = EADDRNOTAVAIL; 510 return (error); 511 } 512 memset(&mapped, 0, sizeof(mapped)); 513 mapped.s6_addr16[5] = htons(0xffff); 514 memcpy(&mapped.s6_addr32[3], &sinp->sin_addr, sizeof(sinp->sin_addr)); 515 in6a = &mapped; 516 #else 517 return EADDRNOTAVAIL; 518 #endif 519 } else { 520 /* 521 * XXX: in6_selectsrc might replace the bound local address 522 * with the address specified by setsockopt(IPV6_PKTINFO). 523 * Is it the intended behavior? 524 */ 525 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 526 in6p->in6p_moptions, 527 &in6p->in6p_route, 528 &in6p->in6p_laddr, &ifp, &error); 529 if (ifp && scope_ambiguous && 530 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 531 return(error); 532 } 533 534 if (in6a == 0) { 535 if (error == 0) 536 error = EADDRNOTAVAIL; 537 return (error); 538 } 539 } 540 541 if (ifp != NULL) 542 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 543 else 544 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim_rt(in6p); 545 546 if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr, 547 sin6->sin6_port, 548 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr, 549 in6p->in6p_lport, 0, &vestige) 550 || vestige.valid) 551 return (EADDRINUSE); 552 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 553 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 554 in6p->in6p_laddr.s6_addr32[3] == 0)) 555 { 556 if (in6p->in6p_lport == 0) { 557 error = in6_pcbbind(in6p, NULL, l); 558 if (error != 0) 559 return error; 560 } 561 in6p->in6p_laddr = *in6a; 562 } 563 in6p->in6p_faddr = sin6->sin6_addr; 564 in6p->in6p_fport = sin6->sin6_port; 565 566 /* Late bind, if needed */ 567 if (in6p->in6p_bindportonsend) { 568 struct sockaddr_in6 lsin = *((const struct sockaddr_in6 *) 569 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 570 lsin.sin6_addr = in6p->in6p_laddr; 571 lsin.sin6_port = 0; 572 573 if ((error = in6_pcbbind_port(in6p, &lsin, l)) != 0) 574 return error; 575 } 576 577 in6_pcbstate(in6p, IN6P_CONNECTED); 578 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 579 if (ip6_auto_flowlabel) 580 in6p->in6p_flowinfo |= 581 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 582 #if defined(IPSEC) 583 if (ipsec_enabled && in6p->in6p_socket->so_type == SOCK_STREAM) 584 ipsec_pcbconn(in6p->in6p_sp); 585 #endif 586 return (0); 587 } 588 589 void 590 in6_pcbdisconnect(struct in6pcb *in6p) 591 { 592 memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr)); 593 in6p->in6p_fport = 0; 594 in6_pcbstate(in6p, IN6P_BOUND); 595 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 596 #if defined(IPSEC) 597 if (ipsec_enabled) 598 ipsec_pcbdisconn(in6p->in6p_sp); 599 #endif 600 if (in6p->in6p_socket->so_state & SS_NOFDREF) 601 in6_pcbdetach(in6p); 602 } 603 604 void 605 in6_pcbdetach(struct in6pcb *in6p) 606 { 607 struct socket *so = in6p->in6p_socket; 608 int s; 609 610 if (in6p->in6p_af != AF_INET6) 611 return; 612 613 #if defined(IPSEC) 614 if (ipsec_enabled) 615 ipsec6_delete_pcbpolicy(in6p); 616 #endif 617 so->so_pcb = NULL; 618 619 s = splnet(); 620 in6_pcbstate(in6p, IN6P_ATTACHED); 621 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 622 TAILQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head, 623 inph_queue); 624 splx(s); 625 626 if (in6p->in6p_options) { 627 m_freem(in6p->in6p_options); 628 } 629 if (in6p->in6p_outputopts != NULL) { 630 ip6_clearpktopts(in6p->in6p_outputopts, -1); 631 free(in6p->in6p_outputopts, M_IP6OPT); 632 } 633 rtcache_free(&in6p->in6p_route); 634 ip6_freemoptions(in6p->in6p_moptions); 635 ip_freemoptions(in6p->in6p_v4moptions); 636 sofree(so); /* drops the socket's lock */ 637 638 pool_put(&in6pcb_pool, in6p); 639 mutex_enter(softnet_lock); /* reacquire it */ 640 } 641 642 void 643 in6_setsockaddr(struct in6pcb *in6p, struct sockaddr_in6 *sin6) 644 { 645 646 if (in6p->in6p_af != AF_INET6) 647 return; 648 649 sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0); 650 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 651 } 652 653 void 654 in6_setpeeraddr(struct in6pcb *in6p, struct sockaddr_in6 *sin6) 655 { 656 657 if (in6p->in6p_af != AF_INET6) 658 return; 659 660 sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0); 661 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 662 } 663 664 /* 665 * Pass some notification to all connections of a protocol 666 * associated with address dst. The local address and/or port numbers 667 * may be specified to limit the search. The "usual action" will be 668 * taken, depending on the ctlinput cmd. The caller must filter any 669 * cmds that are uninteresting (e.g., no error in the map). 670 * Call the protocol specific routine (if any) to report 671 * any errors for each matching socket. 672 * 673 * Must be called at splsoftnet. 674 * 675 * Note: src (4th arg) carries the flowlabel value on the original IPv6 676 * header, in sin6_flowinfo member. 677 */ 678 int 679 in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst, 680 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd, 681 void *cmdarg, void (*notify)(struct in6pcb *, int)) 682 { 683 struct rtentry *rt; 684 struct inpcb_hdr *inph, *ninph; 685 struct sockaddr_in6 sa6_src; 686 const struct sockaddr_in6 *sa6_dst; 687 u_int16_t fport = fport_arg, lport = lport_arg; 688 int errno; 689 int nmatch = 0; 690 u_int32_t flowinfo; 691 692 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 693 return 0; 694 695 sa6_dst = (const struct sockaddr_in6 *)dst; 696 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 697 return 0; 698 699 /* 700 * note that src can be NULL when we get notify by local fragmentation. 701 */ 702 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 703 flowinfo = sa6_src.sin6_flowinfo; 704 705 /* 706 * Redirects go to all references to the destination, 707 * and use in6_rtchange to invalidate the route cache. 708 * Dead host indications: also use in6_rtchange to invalidate 709 * the cache, and deliver the error to all the sockets. 710 * Otherwise, if we have knowledge of the local port and address, 711 * deliver only to that socket. 712 */ 713 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 714 fport = 0; 715 lport = 0; 716 memset((void *)&sa6_src.sin6_addr, 0, sizeof(sa6_src.sin6_addr)); 717 718 if (cmd != PRC_HOSTDEAD) 719 notify = in6_rtchange; 720 } 721 722 errno = inet6ctlerrmap[cmd]; 723 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 724 struct in6pcb *in6p = (struct in6pcb *)inph; 725 if (in6p->in6p_af != AF_INET6) 726 continue; 727 728 /* 729 * Under the following condition, notify of redirects 730 * to the pcb, without making address matches against inpcb. 731 * - redirect notification is arrived. 732 * - the inpcb is unconnected. 733 * - the inpcb is caching !RTF_HOST routing entry. 734 * - the ICMPv6 notification is from the gateway cached in the 735 * inpcb. i.e. ICMPv6 notification is from nexthop gateway 736 * the inpcb used very recently. 737 * 738 * This is to improve interaction between netbsd/openbsd 739 * redirect handling code, and inpcb route cache code. 740 * without the clause, !RTF_HOST routing entry (which carries 741 * gateway used by inpcb right before the ICMPv6 redirect) 742 * will be cached forever in unconnected inpcb. 743 * 744 * There still is a question regarding to what is TRT: 745 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be 746 * generated on packet output. inpcb will always cache 747 * RTF_HOST routing entry so there's no need for the clause 748 * (ICMPv6 redirect will update RTF_HOST routing entry, 749 * and inpcb is caching it already). 750 * However, bsdi/freebsd are vulnerable to local DoS attacks 751 * due to the cloned routing entries. 752 * - Specwise, "destination cache" is mentioned in RFC2461. 753 * Jinmei says that it implies bsdi/freebsd behavior, itojun 754 * is not really convinced. 755 * - Having hiwat/lowat on # of cloned host route (redirect/ 756 * pmtud) may be a good idea. netbsd/openbsd has it. see 757 * icmp6_mtudisc_update(). 758 */ 759 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && 760 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 761 (rt = rtcache_validate(&in6p->in6p_route)) != NULL && 762 !(rt->rt_flags & RTF_HOST)) { 763 const struct sockaddr_in6 *dst6; 764 765 dst6 = (const struct sockaddr_in6 *) 766 rtcache_getdst(&in6p->in6p_route); 767 if (dst6 == NULL) 768 ; 769 else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, 770 &sa6_dst->sin6_addr)) 771 goto do_notify; 772 } 773 774 /* 775 * If the error designates a new path MTU for a destination 776 * and the application (associated with this socket) wanted to 777 * know the value, notify. Note that we notify for all 778 * disconnected sockets if the corresponding application 779 * wanted. This is because some UDP applications keep sending 780 * sockets disconnected. 781 * XXX: should we avoid to notify the value to TCP sockets? 782 */ 783 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 && 784 (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) || 785 IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) { 786 ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst, 787 (u_int32_t *)cmdarg); 788 } 789 790 /* 791 * Detect if we should notify the error. If no source and 792 * destination ports are specified, but non-zero flowinfo and 793 * local address match, notify the error. This is the case 794 * when the error is delivered with an encrypted buffer 795 * by ESP. Otherwise, just compare addresses and ports 796 * as usual. 797 */ 798 if (lport == 0 && fport == 0 && flowinfo && 799 in6p->in6p_socket != NULL && 800 flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 801 IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr)) 802 goto do_notify; 803 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 804 &sa6_dst->sin6_addr) || 805 in6p->in6p_socket == 0 || 806 (lport && in6p->in6p_lport != lport) || 807 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 808 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 809 &sa6_src.sin6_addr)) || 810 (fport && in6p->in6p_fport != fport)) 811 continue; 812 813 do_notify: 814 if (notify) 815 (*notify)(in6p, errno); 816 nmatch++; 817 } 818 return nmatch; 819 } 820 821 void 822 in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) 823 { 824 struct inpcb_hdr *inph, *ninph; 825 struct ip6_moptions *im6o; 826 struct in6_multi_mship *imm, *nimm; 827 828 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 829 struct in6pcb *in6p = (struct in6pcb *)inph; 830 if (in6p->in6p_af != AF_INET6) 831 continue; 832 833 im6o = in6p->in6p_moptions; 834 if (im6o) { 835 /* 836 * Unselect the outgoing interface if it is being 837 * detached. 838 */ 839 if (im6o->im6o_multicast_ifp == ifp) 840 im6o->im6o_multicast_ifp = NULL; 841 842 /* 843 * Drop multicast group membership if we joined 844 * through the interface being detached. 845 * XXX controversial - is it really legal for kernel 846 * to force this? 847 */ 848 for (imm = im6o->im6o_memberships.lh_first; 849 imm != NULL; imm = nimm) { 850 nimm = imm->i6mm_chain.le_next; 851 if (imm->i6mm_maddr->in6m_ifp == ifp) { 852 LIST_REMOVE(imm, i6mm_chain); 853 in6_leavegroup(imm); 854 } 855 } 856 } 857 in_purgeifmcast(in6p->in6p_v4moptions, ifp); 858 } 859 } 860 861 void 862 in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) 863 { 864 struct rtentry *rt; 865 struct inpcb_hdr *inph, *ninph; 866 867 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 868 struct in6pcb *in6p = (struct in6pcb *)inph; 869 if (in6p->in6p_af != AF_INET6) 870 continue; 871 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL && 872 rt->rt_ifp == ifp) 873 in6_rtchange(in6p, 0); 874 } 875 } 876 877 /* 878 * Check for alternatives when higher level complains 879 * about service problems. For now, invalidate cached 880 * routing information. If the route was created dynamically 881 * (by a redirect), time to try a default gateway again. 882 */ 883 void 884 in6_losing(struct in6pcb *in6p) 885 { 886 struct rtentry *rt; 887 struct rt_addrinfo info; 888 889 if (in6p->in6p_af != AF_INET6) 890 return; 891 892 if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL) 893 return; 894 895 memset(&info, 0, sizeof(info)); 896 info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route); 897 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 898 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 899 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 900 if (rt->rt_flags & RTF_DYNAMIC) { 901 (void)rtrequest(RTM_DELETE, rt_getkey(rt), 902 rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL); 903 } 904 /* 905 * A new route can be allocated 906 * the next time output is attempted. 907 */ 908 rtcache_free(&in6p->in6p_route); 909 } 910 911 /* 912 * After a routing change, flush old routing. A new route can be 913 * allocated the next time output is attempted. 914 */ 915 void 916 in6_rtchange(struct in6pcb *in6p, int errno) 917 { 918 if (in6p->in6p_af != AF_INET6) 919 return; 920 921 rtcache_free(&in6p->in6p_route); 922 /* 923 * A new route can be allocated the next time 924 * output is attempted. 925 */ 926 } 927 928 struct in6pcb * 929 in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6, 930 u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp) 931 { 932 struct inpcbhead *head; 933 struct inpcb_hdr *inph; 934 struct in6pcb *in6p, *match = 0; 935 int matchwild = 3, wildcard; 936 u_int16_t lport = lport_arg; 937 938 if (vp) 939 vp->valid = 0; 940 941 head = IN6PCBHASH_PORT(table, lport); 942 LIST_FOREACH(inph, head, inph_lhash) { 943 in6p = (struct in6pcb *)inph; 944 if (in6p->in6p_af != AF_INET6) 945 continue; 946 947 if (in6p->in6p_lport != lport) 948 continue; 949 wildcard = 0; 950 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 951 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 952 continue; 953 } 954 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 955 wildcard++; 956 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 957 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 958 continue; 959 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 960 continue; 961 962 /* duplicate of IPv4 logic */ 963 wildcard = 0; 964 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) && 965 in6p->in6p_faddr.s6_addr32[3]) 966 wildcard++; 967 if (!in6p->in6p_laddr.s6_addr32[3]) { 968 if (laddr6->s6_addr32[3]) 969 wildcard++; 970 } else { 971 if (!laddr6->s6_addr32[3]) 972 wildcard++; 973 else { 974 if (in6p->in6p_laddr.s6_addr32[3] != 975 laddr6->s6_addr32[3]) 976 continue; 977 } 978 } 979 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 980 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 981 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 982 continue; 983 } 984 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 985 wildcard++; 986 } else { 987 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 988 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 989 continue; 990 } 991 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 992 wildcard++; 993 else { 994 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 995 laddr6)) 996 continue; 997 } 998 } 999 if (wildcard && !lookup_wildcard) 1000 continue; 1001 if (wildcard < matchwild) { 1002 match = in6p; 1003 matchwild = wildcard; 1004 if (matchwild == 0) 1005 break; 1006 } 1007 } 1008 if (match && matchwild == 0) 1009 return match; 1010 1011 if (vp && table->vestige && table->vestige->init_ports6) { 1012 struct vestigial_inpcb better; 1013 void *state; 1014 1015 state = (*table->vestige->init_ports6)(laddr6, 1016 lport_arg, 1017 lookup_wildcard); 1018 while (table->vestige 1019 && (*table->vestige->next_port6)(state, vp)) { 1020 1021 if (vp->lport != lport) 1022 continue; 1023 wildcard = 0; 1024 if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6)) 1025 wildcard++; 1026 if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) { 1027 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1028 wildcard++; 1029 } else { 1030 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1031 if (vp->v6only) 1032 continue; 1033 } 1034 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1035 wildcard++; 1036 else { 1037 if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6)) 1038 continue; 1039 } 1040 } 1041 if (wildcard && !lookup_wildcard) 1042 continue; 1043 if (wildcard < matchwild) { 1044 better = *vp; 1045 match = (void*)&better; 1046 1047 matchwild = wildcard; 1048 if (matchwild == 0) 1049 break; 1050 } 1051 } 1052 1053 if (match) { 1054 if (match != (void*)&better) 1055 return match; 1056 else { 1057 *vp = better; 1058 return 0; 1059 } 1060 } 1061 } 1062 return (match); 1063 } 1064 1065 /* 1066 * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to 1067 * IPv4 mapped address. 1068 */ 1069 struct rtentry * 1070 in6_pcbrtentry(struct in6pcb *in6p) 1071 { 1072 struct rtentry *rt; 1073 struct route *ro; 1074 union { 1075 const struct sockaddr *sa; 1076 const struct sockaddr_in6 *sa6; 1077 #ifdef INET 1078 const struct sockaddr_in *sa4; 1079 #endif 1080 } cdst; 1081 1082 ro = &in6p->in6p_route; 1083 1084 if (in6p->in6p_af != AF_INET6) 1085 return (NULL); 1086 1087 cdst.sa = rtcache_getdst(ro); 1088 if (cdst.sa == NULL) 1089 ; 1090 #ifdef INET 1091 else if (cdst.sa->sa_family == AF_INET) { 1092 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)); 1093 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3]) 1094 rtcache_free(ro); 1095 } 1096 #endif 1097 else { 1098 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr, 1099 &in6p->in6p_faddr)) 1100 rtcache_free(ro); 1101 } 1102 if ((rt = rtcache_validate(ro)) == NULL) 1103 rt = rtcache_update(ro, 1); 1104 #ifdef INET 1105 if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 1106 union { 1107 struct sockaddr dst; 1108 struct sockaddr_in dst4; 1109 } u; 1110 struct in_addr addr; 1111 1112 addr.s_addr = in6p->in6p_faddr.s6_addr32[3]; 1113 1114 sockaddr_in_init(&u.dst4, &addr, 0); 1115 if (rtcache_setdst(ro, &u.dst) != 0) 1116 return NULL; 1117 1118 rt = rtcache_init(ro); 1119 } else 1120 #endif 1121 if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 1122 union { 1123 struct sockaddr dst; 1124 struct sockaddr_in6 dst6; 1125 } u; 1126 1127 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0); 1128 if (rtcache_setdst(ro, &u.dst) != 0) 1129 return NULL; 1130 1131 rt = rtcache_init(ro); 1132 } 1133 return rt; 1134 } 1135 1136 struct in6pcb * 1137 in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6, 1138 u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg, 1139 int faith, 1140 struct vestigial_inpcb *vp) 1141 { 1142 struct inpcbhead *head; 1143 struct inpcb_hdr *inph; 1144 struct in6pcb *in6p; 1145 u_int16_t fport = fport_arg, lport = lport_arg; 1146 1147 if (vp) 1148 vp->valid = 0; 1149 1150 head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport); 1151 LIST_FOREACH(inph, head, inph_hash) { 1152 in6p = (struct in6pcb *)inph; 1153 if (in6p->in6p_af != AF_INET6) 1154 continue; 1155 1156 /* find exact match on both source and dest */ 1157 if (in6p->in6p_fport != fport) 1158 continue; 1159 if (in6p->in6p_lport != lport) 1160 continue; 1161 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 1162 continue; 1163 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 1164 continue; 1165 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 1166 continue; 1167 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1168 continue; 1169 if ((IN6_IS_ADDR_V4MAPPED(laddr6) || 1170 IN6_IS_ADDR_V4MAPPED(faddr6)) && 1171 (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) 1172 continue; 1173 return in6p; 1174 } 1175 if (vp && table->vestige) { 1176 if ((*table->vestige->lookup6)(faddr6, fport_arg, 1177 laddr6, lport_arg, vp)) 1178 return 0; 1179 } 1180 1181 return NULL; 1182 } 1183 1184 struct in6pcb * 1185 in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6, 1186 u_int lport_arg, int faith) 1187 { 1188 struct inpcbhead *head; 1189 struct inpcb_hdr *inph; 1190 struct in6pcb *in6p; 1191 u_int16_t lport = lport_arg; 1192 #ifdef INET 1193 struct in6_addr zero_mapped; 1194 #endif 1195 1196 head = IN6PCBHASH_BIND(table, laddr6, lport); 1197 LIST_FOREACH(inph, head, inph_hash) { 1198 in6p = (struct in6pcb *)inph; 1199 if (in6p->in6p_af != AF_INET6) 1200 continue; 1201 1202 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1203 continue; 1204 if (in6p->in6p_fport != 0) 1205 continue; 1206 if (in6p->in6p_lport != lport) 1207 continue; 1208 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1209 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1210 continue; 1211 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1212 goto out; 1213 } 1214 #ifdef INET 1215 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1216 memset(&zero_mapped, 0, sizeof(zero_mapped)); 1217 zero_mapped.s6_addr16[5] = 0xffff; 1218 head = IN6PCBHASH_BIND(table, &zero_mapped, lport); 1219 LIST_FOREACH(inph, head, inph_hash) { 1220 in6p = (struct in6pcb *)inph; 1221 if (in6p->in6p_af != AF_INET6) 1222 continue; 1223 1224 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1225 continue; 1226 if (in6p->in6p_fport != 0) 1227 continue; 1228 if (in6p->in6p_lport != lport) 1229 continue; 1230 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1231 continue; 1232 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped)) 1233 goto out; 1234 } 1235 } 1236 #endif 1237 head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport); 1238 LIST_FOREACH(inph, head, inph_hash) { 1239 in6p = (struct in6pcb *)inph; 1240 if (in6p->in6p_af != AF_INET6) 1241 continue; 1242 1243 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1244 continue; 1245 if (in6p->in6p_fport != 0) 1246 continue; 1247 if (in6p->in6p_lport != lport) 1248 continue; 1249 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1250 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1251 continue; 1252 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr)) 1253 goto out; 1254 } 1255 return (NULL); 1256 1257 out: 1258 inph = &in6p->in6p_head; 1259 if (inph != LIST_FIRST(head)) { 1260 LIST_REMOVE(inph, inph_hash); 1261 LIST_INSERT_HEAD(head, inph, inph_hash); 1262 } 1263 return in6p; 1264 } 1265 1266 void 1267 in6_pcbstate(struct in6pcb *in6p, int state) 1268 { 1269 1270 if (in6p->in6p_af != AF_INET6) 1271 return; 1272 1273 if (in6p->in6p_state > IN6P_ATTACHED) 1274 LIST_REMOVE(&in6p->in6p_head, inph_hash); 1275 1276 switch (state) { 1277 case IN6P_BOUND: 1278 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table, 1279 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1280 inph_hash); 1281 break; 1282 case IN6P_CONNECTED: 1283 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table, 1284 &in6p->in6p_faddr, in6p->in6p_fport, 1285 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1286 inph_hash); 1287 break; 1288 } 1289 1290 in6p->in6p_state = state; 1291 } 1292
Indexes created Tue Sep 23 14:10:03 GMT 2025