in6_pcb.c revision 169154
1/* $FreeBSD: head/sys/netinet6/in6_pcb.c 169154 2007-04-30 23:12:05Z rwatson $ */ 2/* $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei 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/*- 35 * Copyright (c) 1982, 1986, 1991, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 4. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 63 */ 64 65#include "opt_inet.h" 66#include "opt_inet6.h" 67#include "opt_ipsec.h" 68 69#include <sys/param.h> 70#include <sys/systm.h> 71#include <sys/malloc.h> 72#include <sys/mbuf.h> 73#include <sys/domain.h> 74#include <sys/protosw.h> 75#include <sys/socket.h> 76#include <sys/socketvar.h> 77#include <sys/sockio.h> 78#include <sys/errno.h> 79#include <sys/time.h> 80#include <sys/priv.h> 81#include <sys/proc.h> 82#include <sys/jail.h> 83 84#include <vm/uma.h> 85 86#include <net/if.h> 87#include <net/if_types.h> 88#include <net/route.h> 89 90#include <netinet/in.h> 91#include <netinet/in_var.h> 92#include <netinet/in_systm.h> 93#include <netinet/tcp_var.h> 94#include <netinet/ip6.h> 95#include <netinet/ip_var.h> 96#include <netinet6/ip6_var.h> 97#include <netinet6/nd6.h> 98#include <netinet/in_pcb.h> 99#include <netinet6/in6_pcb.h> 100#include <netinet6/scope6_var.h> 101 102#ifdef IPSEC 103#include <netinet6/ipsec.h> 104#ifdef INET6 105#include <netinet6/ipsec6.h> 106#endif 107#include <netinet6/ah.h> 108#ifdef INET6 109#include <netinet6/ah6.h> 110#endif 111#include <netkey/key.h> 112#endif /* IPSEC */ 113 114#ifdef FAST_IPSEC 115#include <netipsec/ipsec.h> 116#include <netipsec/ipsec6.h> 117#include <netipsec/key.h> 118#endif /* FAST_IPSEC */ 119 120struct in6_addr zeroin6_addr; 121 122int 123in6_pcbbind(inp, nam, cred) 124 register struct inpcb *inp; 125 struct sockaddr *nam; 126 struct ucred *cred; 127{ 128 struct socket *so = inp->inp_socket; 129 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 130 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 131 u_short lport = 0; 132 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 133 134 INP_INFO_WLOCK_ASSERT(pcbinfo); 135 INP_LOCK_ASSERT(inp); 136 137 if (!in6_ifaddr) /* XXX broken! */ 138 return (EADDRNOTAVAIL); 139 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 140 return (EINVAL); 141 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 142 wild = INPLOOKUP_WILDCARD; 143 if (nam) { 144 int error; 145 146 sin6 = (struct sockaddr_in6 *)nam; 147 if (nam->sa_len != sizeof(*sin6)) 148 return (EINVAL); 149 /* 150 * family check. 151 */ 152 if (nam->sa_family != AF_INET6) 153 return (EAFNOSUPPORT); 154 155 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 156 return(error); 157 158 lport = sin6->sin6_port; 159 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 160 /* 161 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 162 * allow compepte duplication of binding if 163 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 164 * and a multicast address is bound on both 165 * new and duplicated sockets. 166 */ 167 if (so->so_options & SO_REUSEADDR) 168 reuseport = SO_REUSEADDR|SO_REUSEPORT; 169 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 170 struct ifaddr *ia = NULL; 171 172 sin6->sin6_port = 0; /* yech... */ 173 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 174 return (EADDRNOTAVAIL); 175 176 /* 177 * XXX: bind to an anycast address might accidentally 178 * cause sending a packet with anycast source address. 179 * We should allow to bind to a deprecated address, since 180 * the application dares to use it. 181 */ 182 if (ia && 183 ((struct in6_ifaddr *)ia)->ia6_flags & 184 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 185 return (EADDRNOTAVAIL); 186 } 187 } 188 if (lport) { 189 struct inpcb *t; 190 191 /* GROSS */ 192 if (ntohs(lport) <= ipport_reservedhigh && 193 ntohs(lport) >= ipport_reservedlow && 194 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 195 SUSER_ALLOWJAIL)) 196 return (EACCES); 197 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 198 priv_check_cred(so->so_cred, 199 PRIV_NETINET_REUSEPORT, SUSER_ALLOWJAIL) != 0) { 200 t = in6_pcblookup_local(pcbinfo, 201 &sin6->sin6_addr, lport, 202 INPLOOKUP_WILDCARD); 203 if (t && 204 ((t->inp_vflag & INP_TIMEWAIT) == 0) && 205 (so->so_type != SOCK_STREAM || 206 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 207 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 208 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 209 (t->inp_socket->so_options & SO_REUSEPORT) 210 == 0) && (so->so_cred->cr_uid != 211 t->inp_socket->so_cred->cr_uid)) 212 return (EADDRINUSE); 213 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 214 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 215 struct sockaddr_in sin; 216 217 in6_sin6_2_sin(&sin, sin6); 218 t = in_pcblookup_local(pcbinfo, 219 sin.sin_addr, lport, 220 INPLOOKUP_WILDCARD); 221 if (t && 222 ((t->inp_vflag & 223 INP_TIMEWAIT) == 0) && 224 (so->so_type != SOCK_STREAM || 225 ntohl(t->inp_faddr.s_addr) == 226 INADDR_ANY) && 227 (so->so_cred->cr_uid != 228 t->inp_socket->so_cred->cr_uid)) 229 return (EADDRINUSE); 230 } 231 } 232 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 233 lport, wild); 234 if (t && (reuseport & ((t->inp_vflag & INP_TIMEWAIT) ? 235 intotw(t)->tw_so_options : 236 t->inp_socket->so_options)) == 0) 237 return (EADDRINUSE); 238 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 239 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 240 struct sockaddr_in sin; 241 242 in6_sin6_2_sin(&sin, sin6); 243 t = in_pcblookup_local(pcbinfo, sin.sin_addr, 244 lport, wild); 245 if (t && t->inp_vflag & INP_TIMEWAIT) { 246 if ((reuseport & 247 intotw(t)->tw_so_options) == 0 && 248 (ntohl(t->inp_laddr.s_addr) != 249 INADDR_ANY || ((inp->inp_vflag & 250 INP_IPV6PROTO) == 251 (t->inp_vflag & INP_IPV6PROTO)))) 252 return (EADDRINUSE); 253 } 254 else if (t && 255 (reuseport & t->inp_socket->so_options) 256 == 0 && (ntohl(t->inp_laddr.s_addr) != 257 INADDR_ANY || INP_SOCKAF(so) == 258 INP_SOCKAF(t->inp_socket))) 259 return (EADDRINUSE); 260 } 261 } 262 inp->in6p_laddr = sin6->sin6_addr; 263 } 264 if (lport == 0) { 265 int e; 266 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) 267 return (e); 268 } 269 else { 270 inp->inp_lport = lport; 271 if (in_pcbinshash(inp) != 0) { 272 inp->in6p_laddr = in6addr_any; 273 inp->inp_lport = 0; 274 return (EAGAIN); 275 } 276 } 277 return (0); 278} 279 280/* 281 * Transform old in6_pcbconnect() into an inner subroutine for new 282 * in6_pcbconnect(): Do some validity-checking on the remote 283 * address (in mbuf 'nam') and then determine local host address 284 * (i.e., which interface) to use to access that remote host. 285 * 286 * This preserves definition of in6_pcbconnect(), while supporting a 287 * slightly different version for T/TCP. (This is more than 288 * a bit of a kludge, but cleaning up the internal interfaces would 289 * have forced minor changes in every protocol). 290 */ 291 292int 293in6_pcbladdr(inp, nam, plocal_addr6) 294 register struct inpcb *inp; 295 struct sockaddr *nam; 296 struct in6_addr **plocal_addr6; 297{ 298 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 299 int error = 0; 300 struct ifnet *ifp = NULL; 301 int scope_ambiguous = 0; 302 303 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 304 INP_LOCK_ASSERT(inp); 305 306 if (nam->sa_len != sizeof (*sin6)) 307 return (EINVAL); 308 if (sin6->sin6_family != AF_INET6) 309 return (EAFNOSUPPORT); 310 if (sin6->sin6_port == 0) 311 return (EADDRNOTAVAIL); 312 313 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) 314 scope_ambiguous = 1; 315 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 316 return(error); 317 318 if (in6_ifaddr) { 319 /* 320 * If the destination address is UNSPECIFIED addr, 321 * use the loopback addr, e.g ::1. 322 */ 323 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 324 sin6->sin6_addr = in6addr_loopback; 325 } 326 327 /* 328 * XXX: in6_selectsrc might replace the bound local address 329 * with the address specified by setsockopt(IPV6_PKTINFO). 330 * Is it the intended behavior? 331 */ 332 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 333 inp->in6p_moptions, NULL, 334 &inp->in6p_laddr, &ifp, &error); 335 if (ifp && scope_ambiguous && 336 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 337 return(error); 338 } 339 340 if (*plocal_addr6 == 0) { 341 if (error == 0) 342 error = EADDRNOTAVAIL; 343 return (error); 344 } 345 /* 346 * Don't do pcblookup call here; return interface in 347 * plocal_addr6 348 * and exit to caller, that will do the lookup. 349 */ 350 351 return (0); 352} 353 354/* 355 * Outer subroutine: 356 * Connect from a socket to a specified address. 357 * Both address and port must be specified in argument sin. 358 * If don't have a local address for this socket yet, 359 * then pick one. 360 */ 361int 362in6_pcbconnect(inp, nam, cred) 363 register struct inpcb *inp; 364 struct sockaddr *nam; 365 struct ucred *cred; 366{ 367 struct in6_addr *addr6; 368 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 369 int error; 370 371 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 372 INP_LOCK_ASSERT(inp); 373 374 /* 375 * Call inner routine, to assign local interface address. 376 * in6_pcbladdr() may automatically fill in sin6_scope_id. 377 */ 378 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 379 return (error); 380 381 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 382 sin6->sin6_port, 383 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 384 ? addr6 : &inp->in6p_laddr, 385 inp->inp_lport, 0, NULL) != NULL) { 386 return (EADDRINUSE); 387 } 388 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 389 if (inp->inp_lport == 0) { 390 error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 391 if (error) 392 return (error); 393 } 394 inp->in6p_laddr = *addr6; 395 } 396 inp->in6p_faddr = sin6->sin6_addr; 397 inp->inp_fport = sin6->sin6_port; 398 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 399 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 400 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 401 inp->in6p_flowinfo |= 402 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 403 404 in_pcbrehash(inp); 405#ifdef IPSEC 406 if (inp->inp_socket->so_type == SOCK_STREAM) 407 ipsec_pcbconn(inp->inp_sp); 408#endif 409 return (0); 410} 411 412void 413in6_pcbdisconnect(inp) 414 struct inpcb *inp; 415{ 416 417 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 418 INP_LOCK_ASSERT(inp); 419 420 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 421 inp->inp_fport = 0; 422 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 423 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 424 in_pcbrehash(inp); 425#ifdef IPSEC 426 ipsec_pcbdisconn(inp->inp_sp); 427#endif 428} 429 430void 431in6_pcbdetach(struct inpcb *inp) 432{ 433 434 KASSERT(inp->inp_socket != NULL, ("in6_pcbdetach: inp_socket == NULL")); 435 inp->inp_socket->so_pcb = NULL; 436 inp->inp_socket = NULL; 437} 438 439void 440in6_pcbfree(struct inpcb *inp) 441{ 442 struct inpcbinfo *ipi = inp->inp_pcbinfo; 443 444 KASSERT(inp->inp_socket == NULL, ("in6_pcbfree: inp_socket != NULL")); 445 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 446 INP_LOCK_ASSERT(inp); 447 448#if defined(IPSEC) || defined(FAST_IPSEC) 449 if (inp->in6p_sp != NULL) 450 ipsec6_delete_pcbpolicy(inp); 451#endif /* IPSEC */ 452 inp->inp_gencnt = ++ipi->ipi_gencnt; 453 in_pcbremlists(inp); 454 ip6_freepcbopts(inp->in6p_outputopts); 455 ip6_freemoptions(inp->in6p_moptions); 456 /* Check and free IPv4 related resources in case of mapped addr */ 457 if (inp->inp_options) 458 (void)m_free(inp->inp_options); 459 ip_freemoptions(inp->inp_moptions); 460 inp->inp_vflag = 0; 461 INP_UNLOCK(inp); 462 uma_zfree(ipi->ipi_zone, inp); 463} 464 465struct sockaddr * 466in6_sockaddr(port, addr_p) 467 in_port_t port; 468 struct in6_addr *addr_p; 469{ 470 struct sockaddr_in6 *sin6; 471 472 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK); 473 bzero(sin6, sizeof *sin6); 474 sin6->sin6_family = AF_INET6; 475 sin6->sin6_len = sizeof(*sin6); 476 sin6->sin6_port = port; 477 sin6->sin6_addr = *addr_p; 478 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 479 480 return (struct sockaddr *)sin6; 481} 482 483struct sockaddr * 484in6_v4mapsin6_sockaddr(port, addr_p) 485 in_port_t port; 486 struct in_addr *addr_p; 487{ 488 struct sockaddr_in sin; 489 struct sockaddr_in6 *sin6_p; 490 491 bzero(&sin, sizeof sin); 492 sin.sin_family = AF_INET; 493 sin.sin_len = sizeof(sin); 494 sin.sin_port = port; 495 sin.sin_addr = *addr_p; 496 497 MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME, 498 M_WAITOK); 499 in6_sin_2_v4mapsin6(&sin, sin6_p); 500 501 return (struct sockaddr *)sin6_p; 502} 503 504/* 505 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was 506 * modified to match the pru_sockaddr() and pru_peeraddr() entry points 507 * in struct pr_usrreqs, so that protocols can just reference then directly 508 * without the need for a wrapper function. The socket must have a valid 509 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 510 * except through a kernel programming error, so it is acceptable to panic 511 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 512 * because there actually /is/ a programming error somewhere... XXX) 513 */ 514int 515in6_setsockaddr(so, nam) 516 struct socket *so; 517 struct sockaddr **nam; 518{ 519 register struct inpcb *inp; 520 struct in6_addr addr; 521 in_port_t port; 522 523 inp = sotoinpcb(so); 524 KASSERT(inp != NULL, ("in6_setsockaddr: inp == NULL")); 525 526 INP_LOCK(inp); 527 port = inp->inp_lport; 528 addr = inp->in6p_laddr; 529 INP_UNLOCK(inp); 530 531 *nam = in6_sockaddr(port, &addr); 532 return 0; 533} 534 535int 536in6_setpeeraddr(so, nam) 537 struct socket *so; 538 struct sockaddr **nam; 539{ 540 struct inpcb *inp; 541 struct in6_addr addr; 542 in_port_t port; 543 544 inp = sotoinpcb(so); 545 KASSERT(inp != NULL, ("in6_setpeeraddr: inp == NULL")); 546 547 INP_LOCK(inp); 548 port = inp->inp_fport; 549 addr = inp->in6p_faddr; 550 INP_UNLOCK(inp); 551 552 *nam = in6_sockaddr(port, &addr); 553 return 0; 554} 555 556int 557in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 558{ 559 struct inpcb *inp; 560 int error; 561 562 inp = sotoinpcb(so); 563 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 564 565 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 566 error = in_setsockaddr(so, nam, &tcbinfo); 567 if (error == 0) 568 in6_sin_2_v4mapsin6_in_sock(nam); 569 } else { 570 /* scope issues will be handled in in6_setsockaddr(). */ 571 error = in6_setsockaddr(so, nam); 572 } 573 574 return error; 575} 576 577int 578in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 579{ 580 struct inpcb *inp; 581 int error; 582 583 inp = sotoinpcb(so); 584 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 585 586 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 587 error = in_setpeeraddr(so, nam, &tcbinfo); 588 if (error == 0) 589 in6_sin_2_v4mapsin6_in_sock(nam); 590 } else 591 /* scope issues will be handled in in6_setpeeraddr(). */ 592 error = in6_setpeeraddr(so, nam); 593 594 return error; 595} 596 597/* 598 * Pass some notification to all connections of a protocol 599 * associated with address dst. The local address and/or port numbers 600 * may be specified to limit the search. The "usual action" will be 601 * taken, depending on the ctlinput cmd. The caller must filter any 602 * cmds that are uninteresting (e.g., no error in the map). 603 * Call the protocol specific routine (if any) to report 604 * any errors for each matching socket. 605 */ 606void 607in6_pcbnotify(pcbinfo, dst, fport_arg, src, lport_arg, cmd, cmdarg, notify) 608 struct inpcbinfo *pcbinfo; 609 struct sockaddr *dst; 610 const struct sockaddr *src; 611 u_int fport_arg, lport_arg; 612 int cmd; 613 void *cmdarg; 614 struct inpcb *(*notify) __P((struct inpcb *, int)); 615{ 616 struct inpcbhead *head; 617 struct inpcb *inp, *ninp; 618 struct sockaddr_in6 sa6_src, *sa6_dst; 619 u_short fport = fport_arg, lport = lport_arg; 620 u_int32_t flowinfo; 621 int errno; 622 623 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 624 return; 625 626 sa6_dst = (struct sockaddr_in6 *)dst; 627 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 628 return; 629 630 /* 631 * note that src can be NULL when we get notify by local fragmentation. 632 */ 633 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 634 flowinfo = sa6_src.sin6_flowinfo; 635 636 /* 637 * Redirects go to all references to the destination, 638 * and use in6_rtchange to invalidate the route cache. 639 * Dead host indications: also use in6_rtchange to invalidate 640 * the cache, and deliver the error to all the sockets. 641 * Otherwise, if we have knowledge of the local port and address, 642 * deliver only to that socket. 643 */ 644 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 645 fport = 0; 646 lport = 0; 647 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 648 649 if (cmd != PRC_HOSTDEAD) 650 notify = in6_rtchange; 651 } 652 errno = inet6ctlerrmap[cmd]; 653 head = pcbinfo->ipi_listhead; 654 INP_INFO_WLOCK(pcbinfo); 655 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) { 656 INP_LOCK(inp); 657 ninp = LIST_NEXT(inp, inp_list); 658 659 if ((inp->inp_vflag & INP_IPV6) == 0) { 660 INP_UNLOCK(inp); 661 continue; 662 } 663 664 /* 665 * If the error designates a new path MTU for a destination 666 * and the application (associated with this socket) wanted to 667 * know the value, notify. Note that we notify for all 668 * disconnected sockets if the corresponding application 669 * wanted. This is because some UDP applications keep sending 670 * sockets disconnected. 671 * XXX: should we avoid to notify the value to TCP sockets? 672 */ 673 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 674 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 675 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 676 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 677 (u_int32_t *)cmdarg); 678 } 679 680 /* 681 * Detect if we should notify the error. If no source and 682 * destination ports are specifed, but non-zero flowinfo and 683 * local address match, notify the error. This is the case 684 * when the error is delivered with an encrypted buffer 685 * by ESP. Otherwise, just compare addresses and ports 686 * as usual. 687 */ 688 if (lport == 0 && fport == 0 && flowinfo && 689 inp->inp_socket != NULL && 690 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 691 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 692 goto do_notify; 693 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 694 &sa6_dst->sin6_addr) || 695 inp->inp_socket == 0 || 696 (lport && inp->inp_lport != lport) || 697 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 698 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 699 &sa6_src.sin6_addr)) || 700 (fport && inp->inp_fport != fport)) { 701 INP_UNLOCK(inp); 702 continue; 703 } 704 705 do_notify: 706 if (notify) { 707 if ((*notify)(inp, errno)) 708 INP_UNLOCK(inp); 709 } else 710 INP_UNLOCK(inp); 711 } 712 INP_INFO_WUNLOCK(pcbinfo); 713} 714 715/* 716 * Lookup a PCB based on the local address and port. 717 */ 718struct inpcb * 719in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay) 720 struct inpcbinfo *pcbinfo; 721 struct in6_addr *laddr; 722 u_int lport_arg; 723 int wild_okay; 724{ 725 register struct inpcb *inp; 726 int matchwild = 3, wildcard; 727 u_short lport = lport_arg; 728 729 INP_INFO_WLOCK_ASSERT(pcbinfo); 730 731 if (!wild_okay) { 732 struct inpcbhead *head; 733 /* 734 * Look for an unconnected (wildcard foreign addr) PCB that 735 * matches the local address and port we're looking for. 736 */ 737 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 738 0, pcbinfo->ipi_hashmask)]; 739 LIST_FOREACH(inp, head, inp_hash) { 740 if ((inp->inp_vflag & INP_IPV6) == 0) 741 continue; 742 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 743 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 744 inp->inp_lport == lport) { 745 /* 746 * Found. 747 */ 748 return (inp); 749 } 750 } 751 /* 752 * Not found. 753 */ 754 return (NULL); 755 } else { 756 struct inpcbporthead *porthash; 757 struct inpcbport *phd; 758 struct inpcb *match = NULL; 759 /* 760 * Best fit PCB lookup. 761 * 762 * First see if this local port is in use by looking on the 763 * port hash list. 764 */ 765 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 766 pcbinfo->ipi_porthashmask)]; 767 LIST_FOREACH(phd, porthash, phd_hash) { 768 if (phd->phd_port == lport) 769 break; 770 } 771 if (phd != NULL) { 772 /* 773 * Port is in use by one or more PCBs. Look for best 774 * fit. 775 */ 776 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 777 wildcard = 0; 778 if ((inp->inp_vflag & INP_IPV6) == 0) 779 continue; 780 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 781 wildcard++; 782 if (!IN6_IS_ADDR_UNSPECIFIED( 783 &inp->in6p_laddr)) { 784 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 785 wildcard++; 786 else if (!IN6_ARE_ADDR_EQUAL( 787 &inp->in6p_laddr, laddr)) 788 continue; 789 } else { 790 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 791 wildcard++; 792 } 793 if (wildcard < matchwild) { 794 match = inp; 795 matchwild = wildcard; 796 if (matchwild == 0) { 797 break; 798 } 799 } 800 } 801 } 802 return (match); 803 } 804} 805 806void 807in6_pcbpurgeif0(pcbinfo, ifp) 808 struct inpcbinfo *pcbinfo; 809 struct ifnet *ifp; 810{ 811 struct in6pcb *in6p; 812 struct ip6_moptions *im6o; 813 struct in6_multi_mship *imm, *nimm; 814 815 INP_INFO_RLOCK(pcbinfo); 816 LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) { 817 INP_LOCK(in6p); 818 im6o = in6p->in6p_moptions; 819 if ((in6p->inp_vflag & INP_IPV6) && 820 im6o) { 821 /* 822 * Unselect the outgoing interface if it is being 823 * detached. 824 */ 825 if (im6o->im6o_multicast_ifp == ifp) 826 im6o->im6o_multicast_ifp = NULL; 827 828 /* 829 * Drop multicast group membership if we joined 830 * through the interface being detached. 831 * XXX controversial - is it really legal for kernel 832 * to force this? 833 */ 834 for (imm = im6o->im6o_memberships.lh_first; 835 imm != NULL; imm = nimm) { 836 nimm = imm->i6mm_chain.le_next; 837 if (imm->i6mm_maddr->in6m_ifp == ifp) { 838 LIST_REMOVE(imm, i6mm_chain); 839 in6_delmulti(imm->i6mm_maddr); 840 free(imm, M_IP6MADDR); 841 } 842 } 843 } 844 INP_UNLOCK(in6p); 845 } 846 INP_INFO_RUNLOCK(pcbinfo); 847} 848 849/* 850 * Check for alternatives when higher level complains 851 * about service problems. For now, invalidate cached 852 * routing information. If the route was created dynamically 853 * (by a redirect), time to try a default gateway again. 854 */ 855void 856in6_losing(in6p) 857 struct inpcb *in6p; 858{ 859 /* 860 * We don't store route pointers in the routing table anymore 861 */ 862 return; 863} 864 865/* 866 * After a routing change, flush old routing 867 * and allocate a (hopefully) better one. 868 */ 869struct inpcb * 870in6_rtchange(inp, errno) 871 struct inpcb *inp; 872 int errno; 873{ 874 /* 875 * We don't store route pointers in the routing table anymore 876 */ 877 return inp; 878} 879 880/* 881 * Lookup PCB in hash list. 882 */ 883struct inpcb * 884in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp) 885 struct inpcbinfo *pcbinfo; 886 struct in6_addr *faddr, *laddr; 887 u_int fport_arg, lport_arg; 888 int wildcard; 889 struct ifnet *ifp; 890{ 891 struct inpcbhead *head; 892 register struct inpcb *inp; 893 u_short fport = fport_arg, lport = lport_arg; 894 int faith; 895 896 INP_INFO_RLOCK_ASSERT(pcbinfo); 897 898 if (faithprefix_p != NULL) 899 faith = (*faithprefix_p)(laddr); 900 else 901 faith = 0; 902 903 /* 904 * First look for an exact match. 905 */ 906 head = &pcbinfo->ipi_hashbase[ 907 INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport, 908 pcbinfo->ipi_hashmask)]; 909 LIST_FOREACH(inp, head, inp_hash) { 910 if ((inp->inp_vflag & INP_IPV6) == 0) 911 continue; 912 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 913 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 914 inp->inp_fport == fport && 915 inp->inp_lport == lport) { 916 /* 917 * Found. 918 */ 919 return (inp); 920 } 921 } 922 if (wildcard) { 923 struct inpcb *local_wild = NULL; 924 925 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 926 0, pcbinfo->ipi_hashmask)]; 927 LIST_FOREACH(inp, head, inp_hash) { 928 if ((inp->inp_vflag & INP_IPV6) == 0) 929 continue; 930 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 931 inp->inp_lport == lport) { 932 if (faith && (inp->inp_flags & INP_FAITH) == 0) 933 continue; 934 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 935 laddr)) 936 return (inp); 937 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 938 local_wild = inp; 939 } 940 } 941 return (local_wild); 942 } 943 944 /* 945 * Not found. 946 */ 947 return (NULL); 948} 949 950void 951init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 952{ 953 struct ip6_hdr *ip; 954 955 ip = mtod(m, struct ip6_hdr *); 956 bzero(sin6, sizeof(*sin6)); 957 sin6->sin6_len = sizeof(*sin6); 958 sin6->sin6_family = AF_INET6; 959 sin6->sin6_addr = ip->ip6_src; 960 961 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 962 963 return; 964} 965