in6_pcb.c revision 185366
1/*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ 30 */ 31 32/*- 33 * Copyright (c) 1982, 1986, 1991, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 61 */ 62 63#include <sys/cdefs.h> 64__FBSDID("$FreeBSD: head/sys/netinet6/in6_pcb.c 185366 2008-11-27 10:43:08Z bz $"); 65 66#include "opt_inet.h" 67#include "opt_inet6.h" 68#include "opt_ipsec.h" 69#include "opt_mac.h" 70 71#include <sys/param.h> 72#include <sys/systm.h> 73#include <sys/malloc.h> 74#include <sys/mbuf.h> 75#include <sys/domain.h> 76#include <sys/protosw.h> 77#include <sys/socket.h> 78#include <sys/socketvar.h> 79#include <sys/sockio.h> 80#include <sys/errno.h> 81#include <sys/time.h> 82#include <sys/priv.h> 83#include <sys/proc.h> 84#include <sys/jail.h> 85#include <sys/vimage.h> 86 87#include <vm/uma.h> 88 89#include <net/if.h> 90#include <net/if_types.h> 91#include <net/route.h> 92 93#include <netinet/in.h> 94#include <netinet/in_var.h> 95#include <netinet/in_systm.h> 96#include <netinet/tcp_var.h> 97#include <netinet/ip6.h> 98#include <netinet/ip_var.h> 99 100#include <netinet6/ip6_var.h> 101#include <netinet6/nd6.h> 102#include <netinet/in_pcb.h> 103#include <netinet6/in6_pcb.h> 104#include <netinet6/scope6_var.h> 105 106#ifdef IPSEC 107#include <netipsec/ipsec.h> 108#include <netipsec/ipsec6.h> 109#include <netipsec/key.h> 110#endif /* IPSEC */ 111 112#include <security/mac/mac_framework.h> 113 114struct in6_addr zeroin6_addr; 115 116int 117in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam, 118 struct ucred *cred) 119{ 120 INIT_VNET_INET6(inp->inp_vnet); 121 INIT_VNET_INET(inp->inp_vnet); 122 struct socket *so = inp->inp_socket; 123 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 124 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 125 u_short lport = 0; 126 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 127 128 INP_INFO_WLOCK_ASSERT(pcbinfo); 129 INP_WLOCK_ASSERT(inp); 130 131 if (!V_in6_ifaddr) /* XXX broken! */ 132 return (EADDRNOTAVAIL); 133 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 134 return (EINVAL); 135 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 136 wild = INPLOOKUP_WILDCARD; 137 if (nam) { 138 int error; 139 140 sin6 = (struct sockaddr_in6 *)nam; 141 if (nam->sa_len != sizeof(*sin6)) 142 return (EINVAL); 143 /* 144 * family check. 145 */ 146 if (nam->sa_family != AF_INET6) 147 return (EAFNOSUPPORT); 148 149 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 150 return(error); 151 152 lport = sin6->sin6_port; 153 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 154 /* 155 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 156 * allow compepte duplication of binding if 157 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 158 * and a multicast address is bound on both 159 * new and duplicated sockets. 160 */ 161 if (so->so_options & SO_REUSEADDR) 162 reuseport = SO_REUSEADDR|SO_REUSEPORT; 163 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 164 struct ifaddr *ia = NULL; 165 166 sin6->sin6_port = 0; /* yech... */ 167 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 168 return (EADDRNOTAVAIL); 169 170 /* 171 * XXX: bind to an anycast address might accidentally 172 * cause sending a packet with anycast source address. 173 * We should allow to bind to a deprecated address, since 174 * the application dares to use it. 175 */ 176 if (ia && 177 ((struct in6_ifaddr *)ia)->ia6_flags & 178 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 179 return (EADDRNOTAVAIL); 180 } 181 } 182 if (lport) { 183 struct inpcb *t; 184 185 /* GROSS */ 186 if (ntohs(lport) <= V_ipport_reservedhigh && 187 ntohs(lport) >= V_ipport_reservedlow && 188 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 189 0)) 190 return (EACCES); 191 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 192 priv_check_cred(inp->inp_cred, 193 PRIV_NETINET_REUSEPORT, 0) != 0) { 194 t = in6_pcblookup_local(pcbinfo, 195 &sin6->sin6_addr, lport, 196 INPLOOKUP_WILDCARD, cred); 197 if (t && 198 ((t->inp_vflag & INP_TIMEWAIT) == 0) && 199 (so->so_type != SOCK_STREAM || 200 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 201 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 202 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 203 (t->inp_socket->so_options & SO_REUSEPORT) 204 == 0) && (inp->inp_cred->cr_uid != 205 t->inp_cred->cr_uid)) 206 return (EADDRINUSE); 207 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 208 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 209 struct sockaddr_in sin; 210 211 in6_sin6_2_sin(&sin, sin6); 212 t = in_pcblookup_local(pcbinfo, 213 sin.sin_addr, lport, 214 INPLOOKUP_WILDCARD, cred); 215 if (t && 216 ((t->inp_vflag & 217 INP_TIMEWAIT) == 0) && 218 (so->so_type != SOCK_STREAM || 219 ntohl(t->inp_faddr.s_addr) == 220 INADDR_ANY) && 221 (inp->inp_cred->cr_uid != 222 t->inp_cred->cr_uid)) 223 return (EADDRINUSE); 224 } 225 } 226 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 227 lport, wild, cred); 228 if (t && (reuseport & ((t->inp_vflag & INP_TIMEWAIT) ? 229 intotw(t)->tw_so_options : 230 t->inp_socket->so_options)) == 0) 231 return (EADDRINUSE); 232 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 233 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 234 struct sockaddr_in sin; 235 236 in6_sin6_2_sin(&sin, sin6); 237 t = in_pcblookup_local(pcbinfo, sin.sin_addr, 238 lport, wild, cred); 239 if (t && t->inp_vflag & INP_TIMEWAIT) { 240 if ((reuseport & 241 intotw(t)->tw_so_options) == 0 && 242 (ntohl(t->inp_laddr.s_addr) != 243 INADDR_ANY || ((inp->inp_vflag & 244 INP_IPV6PROTO) == 245 (t->inp_vflag & INP_IPV6PROTO)))) 246 return (EADDRINUSE); 247 } 248 else if (t && 249 (reuseport & t->inp_socket->so_options) 250 == 0 && (ntohl(t->inp_laddr.s_addr) != 251 INADDR_ANY || INP_SOCKAF(so) == 252 INP_SOCKAF(t->inp_socket))) 253 return (EADDRINUSE); 254 } 255 } 256 inp->in6p_laddr = sin6->sin6_addr; 257 } 258 if (lport == 0) { 259 int e; 260 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) 261 return (e); 262 } else { 263 inp->inp_lport = lport; 264 if (in_pcbinshash(inp) != 0) { 265 inp->in6p_laddr = in6addr_any; 266 inp->inp_lport = 0; 267 return (EAGAIN); 268 } 269 } 270 return (0); 271} 272 273/* 274 * Transform old in6_pcbconnect() into an inner subroutine for new 275 * in6_pcbconnect(): Do some validity-checking on the remote 276 * address (in mbuf 'nam') and then determine local host address 277 * (i.e., which interface) to use to access that remote host. 278 * 279 * This preserves definition of in6_pcbconnect(), while supporting a 280 * slightly different version for T/TCP. (This is more than 281 * a bit of a kludge, but cleaning up the internal interfaces would 282 * have forced minor changes in every protocol). 283 */ 284int 285in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam, 286 struct in6_addr **plocal_addr6) 287{ 288 INIT_VNET_INET6(inp->inp_vnet); 289 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 290 int error = 0; 291 struct ifnet *ifp = NULL; 292 int scope_ambiguous = 0; 293 294 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 295 INP_WLOCK_ASSERT(inp); 296 297 if (nam->sa_len != sizeof (*sin6)) 298 return (EINVAL); 299 if (sin6->sin6_family != AF_INET6) 300 return (EAFNOSUPPORT); 301 if (sin6->sin6_port == 0) 302 return (EADDRNOTAVAIL); 303 304 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 305 scope_ambiguous = 1; 306 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 307 return(error); 308 309 if (V_in6_ifaddr) { 310 /* 311 * If the destination address is UNSPECIFIED addr, 312 * use the loopback addr, e.g ::1. 313 */ 314 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 315 sin6->sin6_addr = in6addr_loopback; 316 } 317 318 /* 319 * XXX: in6_selectsrc might replace the bound local address 320 * with the address specified by setsockopt(IPV6_PKTINFO). 321 * Is it the intended behavior? 322 */ 323 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 324 inp, NULL, 325 inp->inp_cred, 326 &ifp, &error); 327 if (ifp && scope_ambiguous && 328 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 329 return(error); 330 } 331 332 if (*plocal_addr6 == NULL) { 333 if (error == 0) 334 error = EADDRNOTAVAIL; 335 return (error); 336 } 337 /* 338 * Don't do pcblookup call here; return interface in 339 * plocal_addr6 340 * and exit to caller, that will do the lookup. 341 */ 342 343 return (0); 344} 345 346/* 347 * Outer subroutine: 348 * Connect from a socket to a specified address. 349 * Both address and port must be specified in argument sin. 350 * If don't have a local address for this socket yet, 351 * then pick one. 352 */ 353int 354in6_pcbconnect(register struct inpcb *inp, struct sockaddr *nam, 355 struct ucred *cred) 356{ 357 struct in6_addr *addr6; 358 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 359 int error; 360 361 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 362 INP_WLOCK_ASSERT(inp); 363 364 /* 365 * Call inner routine, to assign local interface address. 366 * in6_pcbladdr() may automatically fill in sin6_scope_id. 367 */ 368 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 369 return (error); 370 371 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 372 sin6->sin6_port, 373 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 374 ? addr6 : &inp->in6p_laddr, 375 inp->inp_lport, 0, NULL) != NULL) { 376 return (EADDRINUSE); 377 } 378 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 379 if (inp->inp_lport == 0) { 380 error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 381 if (error) 382 return (error); 383 } 384 inp->in6p_laddr = *addr6; 385 } 386 inp->in6p_faddr = sin6->sin6_addr; 387 inp->inp_fport = sin6->sin6_port; 388 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 389 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 390 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 391 inp->in6p_flowinfo |= 392 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 393 394 in_pcbrehash(inp); 395 396 return (0); 397} 398 399void 400in6_pcbdisconnect(struct inpcb *inp) 401{ 402 403 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 404 INP_WLOCK_ASSERT(inp); 405 406 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 407 inp->inp_fport = 0; 408 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 409 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 410 in_pcbrehash(inp); 411} 412 413void 414in6_pcbfree(struct inpcb *inp) 415{ 416 struct inpcbinfo *ipi = inp->inp_pcbinfo; 417 418 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__)); 419 420 INP_INFO_WLOCK_ASSERT(ipi); 421 INP_WLOCK_ASSERT(inp); 422 423#ifdef IPSEC 424 if (inp->in6p_sp != NULL) 425 ipsec_delete_pcbpolicy(inp); 426#endif /* IPSEC */ 427 inp->inp_gencnt = ++ipi->ipi_gencnt; 428 in_pcbremlists(inp); 429 ip6_freepcbopts(inp->in6p_outputopts); 430 ip6_freemoptions(inp->in6p_moptions); 431 /* Check and free IPv4 related resources in case of mapped addr */ 432 if (inp->inp_options) 433 (void)m_free(inp->inp_options); 434 if (inp->inp_moptions != NULL) 435 inp_freemoptions(inp->inp_moptions); 436 inp->inp_vflag = 0; 437 crfree(inp->inp_cred); 438 439#ifdef MAC 440 mac_inpcb_destroy(inp); 441#endif 442 INP_WUNLOCK(inp); 443 uma_zfree(ipi->ipi_zone, inp); 444} 445 446struct sockaddr * 447in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 448{ 449 struct sockaddr_in6 *sin6; 450 451 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 452 bzero(sin6, sizeof *sin6); 453 sin6->sin6_family = AF_INET6; 454 sin6->sin6_len = sizeof(*sin6); 455 sin6->sin6_port = port; 456 sin6->sin6_addr = *addr_p; 457 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 458 459 return (struct sockaddr *)sin6; 460} 461 462struct sockaddr * 463in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 464{ 465 struct sockaddr_in sin; 466 struct sockaddr_in6 *sin6_p; 467 468 bzero(&sin, sizeof sin); 469 sin.sin_family = AF_INET; 470 sin.sin_len = sizeof(sin); 471 sin.sin_port = port; 472 sin.sin_addr = *addr_p; 473 474 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 475 M_WAITOK); 476 in6_sin_2_v4mapsin6(&sin, sin6_p); 477 478 return (struct sockaddr *)sin6_p; 479} 480 481int 482in6_getsockaddr(struct socket *so, struct sockaddr **nam) 483{ 484 register struct inpcb *inp; 485 struct in6_addr addr; 486 in_port_t port; 487 488 inp = sotoinpcb(so); 489 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 490 491 INP_RLOCK(inp); 492 port = inp->inp_lport; 493 addr = inp->in6p_laddr; 494 INP_RUNLOCK(inp); 495 496 *nam = in6_sockaddr(port, &addr); 497 return 0; 498} 499 500int 501in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 502{ 503 struct inpcb *inp; 504 struct in6_addr addr; 505 in_port_t port; 506 507 inp = sotoinpcb(so); 508 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 509 510 INP_RLOCK(inp); 511 port = inp->inp_fport; 512 addr = inp->in6p_faddr; 513 INP_RUNLOCK(inp); 514 515 *nam = in6_sockaddr(port, &addr); 516 return 0; 517} 518 519int 520in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 521{ 522 struct inpcb *inp; 523 int error; 524 525 inp = sotoinpcb(so); 526 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 527 528 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 529 error = in_getsockaddr(so, nam); 530 if (error == 0) 531 in6_sin_2_v4mapsin6_in_sock(nam); 532 } else { 533 /* scope issues will be handled in in6_getsockaddr(). */ 534 error = in6_getsockaddr(so, nam); 535 } 536 537 return error; 538} 539 540int 541in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 542{ 543 struct inpcb *inp; 544 int error; 545 546 inp = sotoinpcb(so); 547 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 548 549 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 550 error = in_getpeeraddr(so, nam); 551 if (error == 0) 552 in6_sin_2_v4mapsin6_in_sock(nam); 553 } else 554 /* scope issues will be handled in in6_getpeeraddr(). */ 555 error = in6_getpeeraddr(so, nam); 556 557 return error; 558} 559 560/* 561 * Pass some notification to all connections of a protocol 562 * associated with address dst. The local address and/or port numbers 563 * may be specified to limit the search. The "usual action" will be 564 * taken, depending on the ctlinput cmd. The caller must filter any 565 * cmds that are uninteresting (e.g., no error in the map). 566 * Call the protocol specific routine (if any) to report 567 * any errors for each matching socket. 568 */ 569void 570in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 571 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 572 int cmd, void *cmdarg, 573 struct inpcb *(*notify)(struct inpcb *, int)) 574{ 575 struct inpcb *inp, *inp_temp; 576 struct sockaddr_in6 sa6_src, *sa6_dst; 577 u_short fport = fport_arg, lport = lport_arg; 578 u_int32_t flowinfo; 579 int errno; 580 581 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 582 return; 583 584 sa6_dst = (struct sockaddr_in6 *)dst; 585 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 586 return; 587 588 /* 589 * note that src can be NULL when we get notify by local fragmentation. 590 */ 591 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 592 flowinfo = sa6_src.sin6_flowinfo; 593 594 /* 595 * Redirects go to all references to the destination, 596 * and use in6_rtchange to invalidate the route cache. 597 * Dead host indications: also use in6_rtchange to invalidate 598 * the cache, and deliver the error to all the sockets. 599 * Otherwise, if we have knowledge of the local port and address, 600 * deliver only to that socket. 601 */ 602 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 603 fport = 0; 604 lport = 0; 605 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 606 607 if (cmd != PRC_HOSTDEAD) 608 notify = in6_rtchange; 609 } 610 errno = inet6ctlerrmap[cmd]; 611 INP_INFO_WLOCK(pcbinfo); 612 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 613 INP_WLOCK(inp); 614 if ((inp->inp_vflag & INP_IPV6) == 0) { 615 INP_WUNLOCK(inp); 616 continue; 617 } 618 619 /* 620 * If the error designates a new path MTU for a destination 621 * and the application (associated with this socket) wanted to 622 * know the value, notify. Note that we notify for all 623 * disconnected sockets if the corresponding application 624 * wanted. This is because some UDP applications keep sending 625 * sockets disconnected. 626 * XXX: should we avoid to notify the value to TCP sockets? 627 */ 628 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 629 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 630 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 631 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 632 (u_int32_t *)cmdarg); 633 } 634 635 /* 636 * Detect if we should notify the error. If no source and 637 * destination ports are specifed, but non-zero flowinfo and 638 * local address match, notify the error. This is the case 639 * when the error is delivered with an encrypted buffer 640 * by ESP. Otherwise, just compare addresses and ports 641 * as usual. 642 */ 643 if (lport == 0 && fport == 0 && flowinfo && 644 inp->inp_socket != NULL && 645 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 646 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 647 goto do_notify; 648 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 649 &sa6_dst->sin6_addr) || 650 inp->inp_socket == 0 || 651 (lport && inp->inp_lport != lport) || 652 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 653 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 654 &sa6_src.sin6_addr)) || 655 (fport && inp->inp_fport != fport)) { 656 INP_WUNLOCK(inp); 657 continue; 658 } 659 660 do_notify: 661 if (notify) { 662 if ((*notify)(inp, errno)) 663 INP_WUNLOCK(inp); 664 } else 665 INP_WUNLOCK(inp); 666 } 667 INP_INFO_WUNLOCK(pcbinfo); 668} 669 670/* 671 * Lookup a PCB based on the local address and port. 672 */ 673struct inpcb * 674in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 675 u_short lport, int wild_okay, struct ucred *cred) 676{ 677 register struct inpcb *inp; 678 int matchwild = 3, wildcard; 679 680 INP_INFO_WLOCK_ASSERT(pcbinfo); 681 682 if (!wild_okay) { 683 struct inpcbhead *head; 684 /* 685 * Look for an unconnected (wildcard foreign addr) PCB that 686 * matches the local address and port we're looking for. 687 */ 688 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 689 0, pcbinfo->ipi_hashmask)]; 690 LIST_FOREACH(inp, head, inp_hash) { 691 if ((inp->inp_vflag & INP_IPV6) == 0) 692 continue; 693 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 694 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 695 inp->inp_lport == lport) { 696 /* 697 * Found. 698 */ 699 return (inp); 700 } 701 } 702 /* 703 * Not found. 704 */ 705 return (NULL); 706 } else { 707 struct inpcbporthead *porthash; 708 struct inpcbport *phd; 709 struct inpcb *match = NULL; 710 /* 711 * Best fit PCB lookup. 712 * 713 * First see if this local port is in use by looking on the 714 * port hash list. 715 */ 716 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 717 pcbinfo->ipi_porthashmask)]; 718 LIST_FOREACH(phd, porthash, phd_hash) { 719 if (phd->phd_port == lport) 720 break; 721 } 722 if (phd != NULL) { 723 /* 724 * Port is in use by one or more PCBs. Look for best 725 * fit. 726 */ 727 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 728 wildcard = 0; 729 if ((inp->inp_vflag & INP_IPV6) == 0) 730 continue; 731 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 732 wildcard++; 733 if (!IN6_IS_ADDR_UNSPECIFIED( 734 &inp->in6p_laddr)) { 735 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 736 wildcard++; 737 else if (!IN6_ARE_ADDR_EQUAL( 738 &inp->in6p_laddr, laddr)) 739 continue; 740 } else { 741 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 742 wildcard++; 743 } 744 if (wildcard < matchwild) { 745 match = inp; 746 matchwild = wildcard; 747 if (matchwild == 0) { 748 break; 749 } 750 } 751 } 752 } 753 return (match); 754 } 755} 756 757void 758in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 759{ 760 struct in6pcb *in6p; 761 struct ip6_moptions *im6o; 762 struct in6_multi_mship *imm, *nimm; 763 764 INP_INFO_RLOCK(pcbinfo); 765 LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) { 766 INP_WLOCK(in6p); 767 im6o = in6p->in6p_moptions; 768 if ((in6p->inp_vflag & INP_IPV6) && 769 im6o) { 770 /* 771 * Unselect the outgoing interface if it is being 772 * detached. 773 */ 774 if (im6o->im6o_multicast_ifp == ifp) 775 im6o->im6o_multicast_ifp = NULL; 776 777 /* 778 * Drop multicast group membership if we joined 779 * through the interface being detached. 780 * XXX controversial - is it really legal for kernel 781 * to force this? 782 */ 783 for (imm = im6o->im6o_memberships.lh_first; 784 imm != NULL; imm = nimm) { 785 nimm = imm->i6mm_chain.le_next; 786 if (imm->i6mm_maddr->in6m_ifp == ifp) { 787 LIST_REMOVE(imm, i6mm_chain); 788 in6_delmulti(imm->i6mm_maddr); 789 free(imm, M_IP6MADDR); 790 } 791 } 792 } 793 INP_WUNLOCK(in6p); 794 } 795 INP_INFO_RUNLOCK(pcbinfo); 796} 797 798/* 799 * Check for alternatives when higher level complains 800 * about service problems. For now, invalidate cached 801 * routing information. If the route was created dynamically 802 * (by a redirect), time to try a default gateway again. 803 */ 804void 805in6_losing(struct inpcb *in6p) 806{ 807 808 /* 809 * We don't store route pointers in the routing table anymore 810 */ 811 return; 812} 813 814/* 815 * After a routing change, flush old routing 816 * and allocate a (hopefully) better one. 817 */ 818struct inpcb * 819in6_rtchange(struct inpcb *inp, int errno) 820{ 821 /* 822 * We don't store route pointers in the routing table anymore 823 */ 824 return inp; 825} 826 827/* 828 * Lookup PCB in hash list. 829 */ 830struct inpcb * 831in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 832 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 833 int wildcard, struct ifnet *ifp) 834{ 835 struct inpcbhead *head; 836 register struct inpcb *inp; 837 u_short fport = fport_arg, lport = lport_arg; 838 int faith; 839 840 INP_INFO_LOCK_ASSERT(pcbinfo); 841 842 if (faithprefix_p != NULL) 843 faith = (*faithprefix_p)(laddr); 844 else 845 faith = 0; 846 847 /* 848 * First look for an exact match. 849 */ 850 head = &pcbinfo->ipi_hashbase[ 851 INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport, 852 pcbinfo->ipi_hashmask)]; 853 LIST_FOREACH(inp, head, inp_hash) { 854 if ((inp->inp_vflag & INP_IPV6) == 0) 855 continue; 856 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 857 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 858 inp->inp_fport == fport && 859 inp->inp_lport == lport) { 860 /* 861 * Found. 862 */ 863 return (inp); 864 } 865 } 866 if (wildcard) { 867 struct inpcb *local_wild = NULL; 868 869 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 870 0, pcbinfo->ipi_hashmask)]; 871 LIST_FOREACH(inp, head, inp_hash) { 872 if ((inp->inp_vflag & INP_IPV6) == 0) 873 continue; 874 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 875 inp->inp_lport == lport) { 876 if (faith && (inp->inp_flags & INP_FAITH) == 0) 877 continue; 878 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 879 laddr)) 880 return (inp); 881 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 882 local_wild = inp; 883 } 884 } 885 return (local_wild); 886 } 887 888 /* 889 * Not found. 890 */ 891 return (NULL); 892} 893 894void 895init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 896{ 897 struct ip6_hdr *ip; 898 899 ip = mtod(m, struct ip6_hdr *); 900 bzero(sin6, sizeof(*sin6)); 901 sin6->sin6_len = sizeof(*sin6); 902 sin6->sin6_family = AF_INET6; 903 sin6->sin6_addr = ip->ip6_src; 904 905 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 906 907 return; 908} 909