in6_pcb.c revision 181887
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 181887 2008-08-20 01:05:56Z julian $"); 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 struct socket *so = inp->inp_socket; 121 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 122 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 123 u_short lport = 0; 124 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 125 126 INP_INFO_WLOCK_ASSERT(pcbinfo); 127 INP_WLOCK_ASSERT(inp); 128 129 if (!V_in6_ifaddr) /* XXX broken! */ 130 return (EADDRNOTAVAIL); 131 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 132 return (EINVAL); 133 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 134 wild = INPLOOKUP_WILDCARD; 135 if (nam) { 136 int error; 137 138 sin6 = (struct sockaddr_in6 *)nam; 139 if (nam->sa_len != sizeof(*sin6)) 140 return (EINVAL); 141 /* 142 * family check. 143 */ 144 if (nam->sa_family != AF_INET6) 145 return (EAFNOSUPPORT); 146 147 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 148 return(error); 149 150 lport = sin6->sin6_port; 151 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 152 /* 153 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 154 * allow compepte duplication of binding if 155 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 156 * and a multicast address is bound on both 157 * new and duplicated sockets. 158 */ 159 if (so->so_options & SO_REUSEADDR) 160 reuseport = SO_REUSEADDR|SO_REUSEPORT; 161 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 162 struct ifaddr *ia = NULL; 163 164 sin6->sin6_port = 0; /* yech... */ 165 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 166 return (EADDRNOTAVAIL); 167 168 /* 169 * XXX: bind to an anycast address might accidentally 170 * cause sending a packet with anycast source address. 171 * We should allow to bind to a deprecated address, since 172 * the application dares to use it. 173 */ 174 if (ia && 175 ((struct in6_ifaddr *)ia)->ia6_flags & 176 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 177 return (EADDRNOTAVAIL); 178 } 179 } 180 if (lport) { 181 struct inpcb *t; 182 183 /* GROSS */ 184 if (ntohs(lport) <= V_ipport_reservedhigh && 185 ntohs(lport) >= V_ipport_reservedlow && 186 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 187 0)) 188 return (EACCES); 189 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 190 priv_check_cred(so->so_cred, 191 PRIV_NETINET_REUSEPORT, 0) != 0) { 192 t = in6_pcblookup_local(pcbinfo, 193 &sin6->sin6_addr, lport, 194 INPLOOKUP_WILDCARD, cred); 195 if (t && 196 ((t->inp_vflag & INP_TIMEWAIT) == 0) && 197 (so->so_type != SOCK_STREAM || 198 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 199 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 200 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 201 (t->inp_socket->so_options & SO_REUSEPORT) 202 == 0) && (so->so_cred->cr_uid != 203 t->inp_socket->so_cred->cr_uid)) 204 return (EADDRINUSE); 205 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 206 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 207 struct sockaddr_in sin; 208 209 in6_sin6_2_sin(&sin, sin6); 210 t = in_pcblookup_local(pcbinfo, 211 sin.sin_addr, lport, 212 INPLOOKUP_WILDCARD, cred); 213 if (t && 214 ((t->inp_vflag & 215 INP_TIMEWAIT) == 0) && 216 (so->so_type != SOCK_STREAM || 217 ntohl(t->inp_faddr.s_addr) == 218 INADDR_ANY) && 219 (so->so_cred->cr_uid != 220 t->inp_socket->so_cred->cr_uid)) 221 return (EADDRINUSE); 222 } 223 } 224 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 225 lport, wild, cred); 226 if (t && (reuseport & ((t->inp_vflag & INP_TIMEWAIT) ? 227 intotw(t)->tw_so_options : 228 t->inp_socket->so_options)) == 0) 229 return (EADDRINUSE); 230 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 231 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 232 struct sockaddr_in sin; 233 234 in6_sin6_2_sin(&sin, sin6); 235 t = in_pcblookup_local(pcbinfo, sin.sin_addr, 236 lport, wild, cred); 237 if (t && t->inp_vflag & INP_TIMEWAIT) { 238 if ((reuseport & 239 intotw(t)->tw_so_options) == 0 && 240 (ntohl(t->inp_laddr.s_addr) != 241 INADDR_ANY || ((inp->inp_vflag & 242 INP_IPV6PROTO) == 243 (t->inp_vflag & INP_IPV6PROTO)))) 244 return (EADDRINUSE); 245 } 246 else if (t && 247 (reuseport & t->inp_socket->so_options) 248 == 0 && (ntohl(t->inp_laddr.s_addr) != 249 INADDR_ANY || INP_SOCKAF(so) == 250 INP_SOCKAF(t->inp_socket))) 251 return (EADDRINUSE); 252 } 253 } 254 inp->in6p_laddr = sin6->sin6_addr; 255 } 256 if (lport == 0) { 257 int e; 258 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) 259 return (e); 260 } 261 else { 262 inp->inp_lport = lport; 263 if (in_pcbinshash(inp) != 0) { 264 inp->in6p_laddr = in6addr_any; 265 inp->inp_lport = 0; 266 return (EAGAIN); 267 } 268 } 269 return (0); 270} 271 272/* 273 * Transform old in6_pcbconnect() into an inner subroutine for new 274 * in6_pcbconnect(): Do some validity-checking on the remote 275 * address (in mbuf 'nam') and then determine local host address 276 * (i.e., which interface) to use to access that remote host. 277 * 278 * This preserves definition of in6_pcbconnect(), while supporting a 279 * slightly different version for T/TCP. (This is more than 280 * a bit of a kludge, but cleaning up the internal interfaces would 281 * have forced minor changes in every protocol). 282 */ 283int 284in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam, 285 struct in6_addr **plocal_addr6) 286{ 287 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 288 int error = 0; 289 struct ifnet *ifp = NULL; 290 int scope_ambiguous = 0; 291 292 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 293 INP_WLOCK_ASSERT(inp); 294 295 if (nam->sa_len != sizeof (*sin6)) 296 return (EINVAL); 297 if (sin6->sin6_family != AF_INET6) 298 return (EAFNOSUPPORT); 299 if (sin6->sin6_port == 0) 300 return (EADDRNOTAVAIL); 301 302 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 303 scope_ambiguous = 1; 304 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 305 return(error); 306 307 if (V_in6_ifaddr) { 308 /* 309 * If the destination address is UNSPECIFIED addr, 310 * use the loopback addr, e.g ::1. 311 */ 312 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 313 sin6->sin6_addr = in6addr_loopback; 314 } 315 316 /* 317 * XXX: in6_selectsrc might replace the bound local address 318 * with the address specified by setsockopt(IPV6_PKTINFO). 319 * Is it the intended behavior? 320 */ 321 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 322 inp, NULL, 323 inp->inp_socket->so_cred, 324 &ifp, &error); 325 if (ifp && scope_ambiguous && 326 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 327 return(error); 328 } 329 330 if (*plocal_addr6 == 0) { 331 if (error == 0) 332 error = EADDRNOTAVAIL; 333 return (error); 334 } 335 /* 336 * Don't do pcblookup call here; return interface in 337 * plocal_addr6 338 * and exit to caller, that will do the lookup. 339 */ 340 341 return (0); 342} 343 344/* 345 * Outer subroutine: 346 * Connect from a socket to a specified address. 347 * Both address and port must be specified in argument sin. 348 * If don't have a local address for this socket yet, 349 * then pick one. 350 */ 351int 352in6_pcbconnect(register struct inpcb *inp, struct sockaddr *nam, 353 struct ucred *cred) 354{ 355 struct in6_addr *addr6; 356 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 357 int error; 358 359 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 360 INP_WLOCK_ASSERT(inp); 361 362 /* 363 * Call inner routine, to assign local interface address. 364 * in6_pcbladdr() may automatically fill in sin6_scope_id. 365 */ 366 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 367 return (error); 368 369 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 370 sin6->sin6_port, 371 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 372 ? addr6 : &inp->in6p_laddr, 373 inp->inp_lport, 0, NULL) != NULL) { 374 return (EADDRINUSE); 375 } 376 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 377 if (inp->inp_lport == 0) { 378 error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 379 if (error) 380 return (error); 381 } 382 inp->in6p_laddr = *addr6; 383 } 384 inp->in6p_faddr = sin6->sin6_addr; 385 inp->inp_fport = sin6->sin6_port; 386 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 387 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 388 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 389 inp->in6p_flowinfo |= 390 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 391 392 in_pcbrehash(inp); 393 394 return (0); 395} 396 397void 398in6_pcbdisconnect(struct inpcb *inp) 399{ 400 401 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 402 INP_WLOCK_ASSERT(inp); 403 404 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 405 inp->inp_fport = 0; 406 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 407 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 408 in_pcbrehash(inp); 409} 410 411void 412in6_pcbdetach(struct inpcb *inp) 413{ 414 415 KASSERT(inp->inp_socket != NULL, ("in6_pcbdetach: inp_socket == NULL")); 416 inp->inp_socket->so_pcb = NULL; 417 inp->inp_socket = NULL; 418} 419 420void 421in6_pcbfree(struct inpcb *inp) 422{ 423 struct inpcbinfo *ipi = inp->inp_pcbinfo; 424 425 KASSERT(inp->inp_socket == NULL, ("in6_pcbfree: inp_socket != NULL")); 426 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 427 INP_WLOCK_ASSERT(inp); 428 429#ifdef IPSEC 430 if (inp->in6p_sp != NULL) 431 ipsec6_delete_pcbpolicy(inp); 432#endif /* IPSEC */ 433 inp->inp_gencnt = ++ipi->ipi_gencnt; 434 in_pcbremlists(inp); 435 ip6_freepcbopts(inp->in6p_outputopts); 436 ip6_freemoptions(inp->in6p_moptions); 437 /* Check and free IPv4 related resources in case of mapped addr */ 438 if (inp->inp_options) 439 (void)m_free(inp->inp_options); 440 if (inp->inp_moptions != NULL) 441 inp_freemoptions(inp->inp_moptions); 442 inp->inp_vflag = 0; 443#ifdef MAC 444 mac_inpcb_destroy(inp); 445#endif 446 INP_WUNLOCK(inp); 447 uma_zfree(ipi->ipi_zone, inp); 448} 449 450struct sockaddr * 451in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 452{ 453 struct sockaddr_in6 *sin6; 454 455 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK); 456 bzero(sin6, sizeof *sin6); 457 sin6->sin6_family = AF_INET6; 458 sin6->sin6_len = sizeof(*sin6); 459 sin6->sin6_port = port; 460 sin6->sin6_addr = *addr_p; 461 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 462 463 return (struct sockaddr *)sin6; 464} 465 466struct sockaddr * 467in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 468{ 469 struct sockaddr_in sin; 470 struct sockaddr_in6 *sin6_p; 471 472 bzero(&sin, sizeof sin); 473 sin.sin_family = AF_INET; 474 sin.sin_len = sizeof(sin); 475 sin.sin_port = port; 476 sin.sin_addr = *addr_p; 477 478 MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME, 479 M_WAITOK); 480 in6_sin_2_v4mapsin6(&sin, sin6_p); 481 482 return (struct sockaddr *)sin6_p; 483} 484 485int 486in6_getsockaddr(struct socket *so, struct sockaddr **nam) 487{ 488 register struct inpcb *inp; 489 struct in6_addr addr; 490 in_port_t port; 491 492 inp = sotoinpcb(so); 493 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 494 495 INP_RLOCK(inp); 496 port = inp->inp_lport; 497 addr = inp->in6p_laddr; 498 INP_RUNLOCK(inp); 499 500 *nam = in6_sockaddr(port, &addr); 501 return 0; 502} 503 504int 505in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 506{ 507 struct inpcb *inp; 508 struct in6_addr addr; 509 in_port_t port; 510 511 inp = sotoinpcb(so); 512 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 513 514 INP_RLOCK(inp); 515 port = inp->inp_fport; 516 addr = inp->in6p_faddr; 517 INP_RUNLOCK(inp); 518 519 *nam = in6_sockaddr(port, &addr); 520 return 0; 521} 522 523int 524in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 525{ 526 struct inpcb *inp; 527 int error; 528 529 inp = sotoinpcb(so); 530 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 531 532 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 533 error = in_getsockaddr(so, nam); 534 if (error == 0) 535 in6_sin_2_v4mapsin6_in_sock(nam); 536 } else { 537 /* scope issues will be handled in in6_getsockaddr(). */ 538 error = in6_getsockaddr(so, nam); 539 } 540 541 return error; 542} 543 544int 545in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 546{ 547 struct inpcb *inp; 548 int error; 549 550 inp = sotoinpcb(so); 551 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 552 553 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 554 error = in_getpeeraddr(so, nam); 555 if (error == 0) 556 in6_sin_2_v4mapsin6_in_sock(nam); 557 } else 558 /* scope issues will be handled in in6_getpeeraddr(). */ 559 error = in6_getpeeraddr(so, nam); 560 561 return error; 562} 563 564/* 565 * Pass some notification to all connections of a protocol 566 * associated with address dst. The local address and/or port numbers 567 * may be specified to limit the search. The "usual action" will be 568 * taken, depending on the ctlinput cmd. The caller must filter any 569 * cmds that are uninteresting (e.g., no error in the map). 570 * Call the protocol specific routine (if any) to report 571 * any errors for each matching socket. 572 */ 573void 574in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 575 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 576 int cmd, void *cmdarg, 577 struct inpcb *(*notify)(struct inpcb *, int)) 578{ 579 struct inpcb *inp, *inp_temp; 580 struct sockaddr_in6 sa6_src, *sa6_dst; 581 u_short fport = fport_arg, lport = lport_arg; 582 u_int32_t flowinfo; 583 int errno; 584 585 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 586 return; 587 588 sa6_dst = (struct sockaddr_in6 *)dst; 589 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 590 return; 591 592 /* 593 * note that src can be NULL when we get notify by local fragmentation. 594 */ 595 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 596 flowinfo = sa6_src.sin6_flowinfo; 597 598 /* 599 * Redirects go to all references to the destination, 600 * and use in6_rtchange to invalidate the route cache. 601 * Dead host indications: also use in6_rtchange to invalidate 602 * the cache, and deliver the error to all the sockets. 603 * Otherwise, if we have knowledge of the local port and address, 604 * deliver only to that socket. 605 */ 606 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 607 fport = 0; 608 lport = 0; 609 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 610 611 if (cmd != PRC_HOSTDEAD) 612 notify = in6_rtchange; 613 } 614 errno = inet6ctlerrmap[cmd]; 615 INP_INFO_WLOCK(pcbinfo); 616 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 617 INP_WLOCK(inp); 618 if ((inp->inp_vflag & INP_IPV6) == 0) { 619 INP_WUNLOCK(inp); 620 continue; 621 } 622 623 /* 624 * If the error designates a new path MTU for a destination 625 * and the application (associated with this socket) wanted to 626 * know the value, notify. Note that we notify for all 627 * disconnected sockets if the corresponding application 628 * wanted. This is because some UDP applications keep sending 629 * sockets disconnected. 630 * XXX: should we avoid to notify the value to TCP sockets? 631 */ 632 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 633 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 634 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 635 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 636 (u_int32_t *)cmdarg); 637 } 638 639 /* 640 * Detect if we should notify the error. If no source and 641 * destination ports are specifed, but non-zero flowinfo and 642 * local address match, notify the error. This is the case 643 * when the error is delivered with an encrypted buffer 644 * by ESP. Otherwise, just compare addresses and ports 645 * as usual. 646 */ 647 if (lport == 0 && fport == 0 && flowinfo && 648 inp->inp_socket != NULL && 649 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 650 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 651 goto do_notify; 652 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 653 &sa6_dst->sin6_addr) || 654 inp->inp_socket == 0 || 655 (lport && inp->inp_lport != lport) || 656 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 657 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 658 &sa6_src.sin6_addr)) || 659 (fport && inp->inp_fport != fport)) { 660 INP_WUNLOCK(inp); 661 continue; 662 } 663 664 do_notify: 665 if (notify) { 666 if ((*notify)(inp, errno)) 667 INP_WUNLOCK(inp); 668 } else 669 INP_WUNLOCK(inp); 670 } 671 INP_INFO_WUNLOCK(pcbinfo); 672} 673 674/* 675 * Lookup a PCB based on the local address and port. 676 */ 677struct inpcb * 678in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 679 u_short lport, int wild_okay, struct ucred *cred) 680{ 681 register struct inpcb *inp; 682 int matchwild = 3, wildcard; 683 684 INP_INFO_WLOCK_ASSERT(pcbinfo); 685 686 if (!wild_okay) { 687 struct inpcbhead *head; 688 /* 689 * Look for an unconnected (wildcard foreign addr) PCB that 690 * matches the local address and port we're looking for. 691 */ 692 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 693 0, pcbinfo->ipi_hashmask)]; 694 LIST_FOREACH(inp, head, inp_hash) { 695 if ((inp->inp_vflag & INP_IPV6) == 0) 696 continue; 697 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 698 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 699 inp->inp_lport == lport) { 700 /* 701 * Found. 702 */ 703 return (inp); 704 } 705 } 706 /* 707 * Not found. 708 */ 709 return (NULL); 710 } else { 711 struct inpcbporthead *porthash; 712 struct inpcbport *phd; 713 struct inpcb *match = NULL; 714 /* 715 * Best fit PCB lookup. 716 * 717 * First see if this local port is in use by looking on the 718 * port hash list. 719 */ 720 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 721 pcbinfo->ipi_porthashmask)]; 722 LIST_FOREACH(phd, porthash, phd_hash) { 723 if (phd->phd_port == lport) 724 break; 725 } 726 if (phd != NULL) { 727 /* 728 * Port is in use by one or more PCBs. Look for best 729 * fit. 730 */ 731 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 732 wildcard = 0; 733 if ((inp->inp_vflag & INP_IPV6) == 0) 734 continue; 735 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 736 wildcard++; 737 if (!IN6_IS_ADDR_UNSPECIFIED( 738 &inp->in6p_laddr)) { 739 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 740 wildcard++; 741 else if (!IN6_ARE_ADDR_EQUAL( 742 &inp->in6p_laddr, laddr)) 743 continue; 744 } else { 745 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 746 wildcard++; 747 } 748 if (wildcard < matchwild) { 749 match = inp; 750 matchwild = wildcard; 751 if (matchwild == 0) { 752 break; 753 } 754 } 755 } 756 } 757 return (match); 758 } 759} 760 761void 762in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 763{ 764 struct in6pcb *in6p; 765 struct ip6_moptions *im6o; 766 struct in6_multi_mship *imm, *nimm; 767 768 INP_INFO_RLOCK(pcbinfo); 769 LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) { 770 INP_WLOCK(in6p); 771 im6o = in6p->in6p_moptions; 772 if ((in6p->inp_vflag & INP_IPV6) && 773 im6o) { 774 /* 775 * Unselect the outgoing interface if it is being 776 * detached. 777 */ 778 if (im6o->im6o_multicast_ifp == ifp) 779 im6o->im6o_multicast_ifp = NULL; 780 781 /* 782 * Drop multicast group membership if we joined 783 * through the interface being detached. 784 * XXX controversial - is it really legal for kernel 785 * to force this? 786 */ 787 for (imm = im6o->im6o_memberships.lh_first; 788 imm != NULL; imm = nimm) { 789 nimm = imm->i6mm_chain.le_next; 790 if (imm->i6mm_maddr->in6m_ifp == ifp) { 791 LIST_REMOVE(imm, i6mm_chain); 792 in6_delmulti(imm->i6mm_maddr); 793 free(imm, M_IP6MADDR); 794 } 795 } 796 } 797 INP_WUNLOCK(in6p); 798 } 799 INP_INFO_RUNLOCK(pcbinfo); 800} 801 802/* 803 * Check for alternatives when higher level complains 804 * about service problems. For now, invalidate cached 805 * routing information. If the route was created dynamically 806 * (by a redirect), time to try a default gateway again. 807 */ 808void 809in6_losing(struct inpcb *in6p) 810{ 811 812 /* 813 * We don't store route pointers in the routing table anymore 814 */ 815 return; 816} 817 818/* 819 * After a routing change, flush old routing 820 * and allocate a (hopefully) better one. 821 */ 822struct inpcb * 823in6_rtchange(struct inpcb *inp, int errno) 824{ 825 /* 826 * We don't store route pointers in the routing table anymore 827 */ 828 return inp; 829} 830 831/* 832 * Lookup PCB in hash list. 833 */ 834struct inpcb * 835in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 836 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 837 int wildcard, struct ifnet *ifp) 838{ 839 struct inpcbhead *head; 840 register struct inpcb *inp; 841 u_short fport = fport_arg, lport = lport_arg; 842 int faith; 843 844 INP_INFO_LOCK_ASSERT(pcbinfo); 845 846 if (faithprefix_p != NULL) 847 faith = (*faithprefix_p)(laddr); 848 else 849 faith = 0; 850 851 /* 852 * First look for an exact match. 853 */ 854 head = &pcbinfo->ipi_hashbase[ 855 INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport, 856 pcbinfo->ipi_hashmask)]; 857 LIST_FOREACH(inp, head, inp_hash) { 858 if ((inp->inp_vflag & INP_IPV6) == 0) 859 continue; 860 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 861 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 862 inp->inp_fport == fport && 863 inp->inp_lport == lport) { 864 /* 865 * Found. 866 */ 867 return (inp); 868 } 869 } 870 if (wildcard) { 871 struct inpcb *local_wild = NULL; 872 873 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 874 0, pcbinfo->ipi_hashmask)]; 875 LIST_FOREACH(inp, head, inp_hash) { 876 if ((inp->inp_vflag & INP_IPV6) == 0) 877 continue; 878 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 879 inp->inp_lport == lport) { 880 if (faith && (inp->inp_flags & INP_FAITH) == 0) 881 continue; 882 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 883 laddr)) 884 return (inp); 885 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 886 local_wild = inp; 887 } 888 } 889 return (local_wild); 890 } 891 892 /* 893 * Not found. 894 */ 895 return (NULL); 896} 897 898void 899init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 900{ 901 struct ip6_hdr *ip; 902 903 ip = mtod(m, struct ip6_hdr *); 904 bzero(sin6, sizeof(*sin6)); 905 sin6->sin6_len = sizeof(*sin6); 906 sin6->sin6_family = AF_INET6; 907 sin6->sin6_addr = ip->ip6_src; 908 909 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 910 911 return; 912} 913