1 /* $FreeBSD$ */ 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 <netipsec/ipsec.h> 104 #include <netipsec/ipsec6.h> 105 #include <netipsec/key.h> 106 #endif /* IPSEC */ 107 108 struct in6_addr zeroin6_addr; 109 110 int 111 in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam, 112 struct ucred *cred) 113 { 114 struct socket *so = inp->inp_socket; 115 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 116 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 117 u_short lport = 0; 118 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 119 120 INP_INFO_WLOCK_ASSERT(pcbinfo); 121 INP_LOCK_ASSERT(inp); 122 123 if (!in6_ifaddr) /* XXX broken! */ 124 return (EADDRNOTAVAIL); 125 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 126 return (EINVAL); 127 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 128 wild = INPLOOKUP_WILDCARD; 129 if (nam) { 130 int error; 131 132 sin6 = (struct sockaddr_in6 *)nam; 133 if (nam->sa_len != sizeof(*sin6)) 134 return (EINVAL); 135 /* 136 * family check. 137 */ 138 if (nam->sa_family != AF_INET6) 139 return (EAFNOSUPPORT); 140 141 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 142 return(error); 143 144 lport = sin6->sin6_port; 145 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 146 /* 147 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 148 * allow compepte duplication of binding if 149 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 150 * and a multicast address is bound on both 151 * new and duplicated sockets. 152 */ 153 if (so->so_options & SO_REUSEADDR) 154 reuseport = SO_REUSEADDR|SO_REUSEPORT; 155 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 156 struct ifaddr *ia = NULL; 157 158 sin6->sin6_port = 0; /* yech... */ 159 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 160 return (EADDRNOTAVAIL); 161 162 /* 163 * XXX: bind to an anycast address might accidentally 164 * cause sending a packet with anycast source address. 165 * We should allow to bind to a deprecated address, since 166 * the application dares to use it. 167 */ 168 if (ia && 169 ((struct in6_ifaddr *)ia)->ia6_flags & 170 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 171 return (EADDRNOTAVAIL); 172 } 173 } 174 if (lport) { 175 struct inpcb *t; 176 177 /* GROSS */ 178 if (ntohs(lport) <= ipport_reservedhigh && 179 ntohs(lport) >= ipport_reservedlow && 180 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 181 0)) 182 return (EACCES); 183 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 184 priv_check_cred(so->so_cred, 185 PRIV_NETINET_REUSEPORT, 0) != 0) { 186 t = in6_pcblookup_local(pcbinfo, 187 &sin6->sin6_addr, lport, 188 INPLOOKUP_WILDCARD); 189 if (t && 190 ((t->inp_vflag & INP_TIMEWAIT) == 0) && 191 (so->so_type != SOCK_STREAM || 192 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 193 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 194 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 195 (t->inp_socket->so_options & SO_REUSEPORT) 196 == 0) && (so->so_cred->cr_uid != 197 t->inp_socket->so_cred->cr_uid)) 198 return (EADDRINUSE); 199 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 200 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 201 struct sockaddr_in sin; 202 203 in6_sin6_2_sin(&sin, sin6); 204 t = in_pcblookup_local(pcbinfo, 205 sin.sin_addr, lport, 206 INPLOOKUP_WILDCARD); 207 if (t && 208 ((t->inp_vflag & 209 INP_TIMEWAIT) == 0) && 210 (so->so_type != SOCK_STREAM || 211 ntohl(t->inp_faddr.s_addr) == 212 INADDR_ANY) && 213 (so->so_cred->cr_uid != 214 t->inp_socket->so_cred->cr_uid)) 215 return (EADDRINUSE); 216 } 217 } 218 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 219 lport, wild); 220 if (t && (reuseport & ((t->inp_vflag & INP_TIMEWAIT) ? 221 intotw(t)->tw_so_options : 222 t->inp_socket->so_options)) == 0) 223 return (EADDRINUSE); 224 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 225 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 226 struct sockaddr_in sin; 227 228 in6_sin6_2_sin(&sin, sin6); 229 t = in_pcblookup_local(pcbinfo, sin.sin_addr, 230 lport, wild); 231 if (t && t->inp_vflag & INP_TIMEWAIT) { 232 if ((reuseport & 233 intotw(t)->tw_so_options) == 0 && 234 (ntohl(t->inp_laddr.s_addr) != 235 INADDR_ANY || ((inp->inp_vflag & 236 INP_IPV6PROTO) == 237 (t->inp_vflag & INP_IPV6PROTO)))) 238 return (EADDRINUSE); 239 } 240 else if (t && 241 (reuseport & t->inp_socket->so_options) 242 == 0 && (ntohl(t->inp_laddr.s_addr) != 243 INADDR_ANY || INP_SOCKAF(so) == 244 INP_SOCKAF(t->inp_socket))) 245 return (EADDRINUSE); 246 } 247 } 248 inp->in6p_laddr = sin6->sin6_addr; 249 } 250 if (lport == 0) { 251 int e; 252 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) 253 return (e); 254 } 255 else { 256 inp->inp_lport = lport; 257 if (in_pcbinshash(inp) != 0) { 258 inp->in6p_laddr = in6addr_any; 259 inp->inp_lport = 0; 260 return (EAGAIN); 261 } 262 } 263 return (0); 264 } 265 266 /* 267 * Transform old in6_pcbconnect() into an inner subroutine for new 268 * in6_pcbconnect(): Do some validity-checking on the remote 269 * address (in mbuf 'nam') and then determine local host address 270 * (i.e., which interface) to use to access that remote host. 271 * 272 * This preserves definition of in6_pcbconnect(), while supporting a 273 * slightly different version for T/TCP. (This is more than 274 * a bit of a kludge, but cleaning up the internal interfaces would 275 * have forced minor changes in every protocol). 276 */ 277 int 278 in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam, 279 struct in6_addr **plocal_addr6) 280 { 281 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 282 int error = 0; 283 struct ifnet *ifp = NULL; 284 int scope_ambiguous = 0; 285 286 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 287 INP_LOCK_ASSERT(inp); 288 289 if (nam->sa_len != sizeof (*sin6)) 290 return (EINVAL); 291 if (sin6->sin6_family != AF_INET6) 292 return (EAFNOSUPPORT); 293 if (sin6->sin6_port == 0) 294 return (EADDRNOTAVAIL); 295 296 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) 297 scope_ambiguous = 1; 298 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 299 return(error); 300 301 if (in6_ifaddr) { 302 /* 303 * If the destination address is UNSPECIFIED addr, 304 * use the loopback addr, e.g ::1. 305 */ 306 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 307 sin6->sin6_addr = in6addr_loopback; 308 } 309 310 /* 311 * XXX: in6_selectsrc might replace the bound local address 312 * with the address specified by setsockopt(IPV6_PKTINFO). 313 * Is it the intended behavior? 314 */ 315 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 316 inp->in6p_moptions, NULL, 317 &inp->in6p_laddr, &ifp, &error); 318 if (ifp && scope_ambiguous && 319 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 320 return(error); 321 } 322 323 if (*plocal_addr6 == 0) { 324 if (error == 0) 325 error = EADDRNOTAVAIL; 326 return (error); 327 } 328 /* 329 * Don't do pcblookup call here; return interface in 330 * plocal_addr6 331 * and exit to caller, that will do the lookup. 332 */ 333 334 return (0); 335 } 336 337 /* 338 * Outer subroutine: 339 * Connect from a socket to a specified address. 340 * Both address and port must be specified in argument sin. 341 * If don't have a local address for this socket yet, 342 * then pick one. 343 */ 344 int 345 in6_pcbconnect(register struct inpcb *inp, struct sockaddr *nam, 346 struct ucred *cred) 347 { 348 struct in6_addr *addr6; 349 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 350 int error; 351 352 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 353 INP_LOCK_ASSERT(inp); 354 355 /* 356 * Call inner routine, to assign local interface address. 357 * in6_pcbladdr() may automatically fill in sin6_scope_id. 358 */ 359 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 360 return (error); 361 362 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 363 sin6->sin6_port, 364 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 365 ? addr6 : &inp->in6p_laddr, 366 inp->inp_lport, 0, NULL) != NULL) { 367 return (EADDRINUSE); 368 } 369 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 370 if (inp->inp_lport == 0) { 371 error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 372 if (error) 373 return (error); 374 } 375 inp->in6p_laddr = *addr6; 376 } 377 inp->in6p_faddr = sin6->sin6_addr; 378 inp->inp_fport = sin6->sin6_port; 379 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 380 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 381 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 382 inp->in6p_flowinfo |= 383 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 384 385 in_pcbrehash(inp); 386 387 return (0); 388 } 389 390 void 391 in6_pcbdisconnect(struct inpcb *inp) 392 { 393 394 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 395 INP_LOCK_ASSERT(inp); 396 397 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 398 inp->inp_fport = 0; 399 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 400 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 401 in_pcbrehash(inp); 402 } 403 404 void 405 in6_pcbdetach(struct inpcb *inp) 406 { 407 408 KASSERT(inp->inp_socket != NULL, ("in6_pcbdetach: inp_socket == NULL")); 409 inp->inp_socket->so_pcb = NULL; 410 inp->inp_socket = NULL; 411 } 412 413 void 414 in6_pcbfree(struct inpcb *inp) 415 { 416 struct inpcbinfo *ipi = inp->inp_pcbinfo; 417 418 KASSERT(inp->inp_socket == NULL, ("in6_pcbfree: inp_socket != NULL")); 419 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 420 INP_LOCK_ASSERT(inp); 421 422 #ifdef IPSEC 423 if (inp->in6p_sp != NULL) 424 ipsec6_delete_pcbpolicy(inp); 425 #endif /* IPSEC */ 426 inp->inp_gencnt = ++ipi->ipi_gencnt; 427 in_pcbremlists(inp); 428 ip6_freepcbopts(inp->in6p_outputopts); 429 ip6_freemoptions(inp->in6p_moptions); 430 /* Check and free IPv4 related resources in case of mapped addr */ 431 if (inp->inp_options) 432 (void)m_free(inp->inp_options); 433 if (inp->inp_moptions != NULL) 434 inp_freemoptions(inp->inp_moptions); 435 inp->inp_vflag = 0; 436 INP_UNLOCK(inp); 437 uma_zfree(ipi->ipi_zone, inp); 438 } 439 440 struct sockaddr * 441 in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 442 { 443 struct sockaddr_in6 *sin6; 444 445 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK); 446 bzero(sin6, sizeof *sin6); 447 sin6->sin6_family = AF_INET6; 448 sin6->sin6_len = sizeof(*sin6); 449 sin6->sin6_port = port; 450 sin6->sin6_addr = *addr_p; 451 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 452 453 return (struct sockaddr *)sin6; 454 } 455 456 struct sockaddr * 457 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 458 { 459 struct sockaddr_in sin; 460 struct sockaddr_in6 *sin6_p; 461 462 bzero(&sin, sizeof sin); 463 sin.sin_family = AF_INET; 464 sin.sin_len = sizeof(sin); 465 sin.sin_port = port; 466 sin.sin_addr = *addr_p; 467 468 MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME, 469 M_WAITOK); 470 in6_sin_2_v4mapsin6(&sin, sin6_p); 471 472 return (struct sockaddr *)sin6_p; 473 } 474 475 int 476 in6_getsockaddr(struct socket *so, struct sockaddr **nam) 477 { 478 register struct inpcb *inp; 479 struct in6_addr addr; 480 in_port_t port; 481 482 inp = sotoinpcb(so); 483 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 484 485 INP_LOCK(inp); 486 port = inp->inp_lport; 487 addr = inp->in6p_laddr; 488 INP_UNLOCK(inp); 489 490 *nam = in6_sockaddr(port, &addr); 491 return 0; 492 } 493 494 int 495 in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 496 { 497 struct inpcb *inp; 498 struct in6_addr addr; 499 in_port_t port; 500 501 inp = sotoinpcb(so); 502 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 503 504 INP_LOCK(inp); 505 port = inp->inp_fport; 506 addr = inp->in6p_faddr; 507 INP_UNLOCK(inp); 508 509 *nam = in6_sockaddr(port, &addr); 510 return 0; 511 } 512 513 int 514 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 515 { 516 struct inpcb *inp; 517 int error; 518 519 inp = sotoinpcb(so); 520 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 521 522 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 523 error = in_getsockaddr(so, nam); 524 if (error == 0) 525 in6_sin_2_v4mapsin6_in_sock(nam); 526 } else { 527 /* scope issues will be handled in in6_getsockaddr(). */ 528 error = in6_getsockaddr(so, nam); 529 } 530 531 return error; 532 } 533 534 int 535 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 536 { 537 struct inpcb *inp; 538 int error; 539 540 inp = sotoinpcb(so); 541 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 542 543 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 544 error = in_getpeeraddr(so, nam); 545 if (error == 0) 546 in6_sin_2_v4mapsin6_in_sock(nam); 547 } else 548 /* scope issues will be handled in in6_getpeeraddr(). */ 549 error = in6_getpeeraddr(so, nam); 550 551 return error; 552 } 553 554 /* 555 * Pass some notification to all connections of a protocol 556 * associated with address dst. The local address and/or port numbers 557 * may be specified to limit the search. The "usual action" will be 558 * taken, depending on the ctlinput cmd. The caller must filter any 559 * cmds that are uninteresting (e.g., no error in the map). 560 * Call the protocol specific routine (if any) to report 561 * any errors for each matching socket. 562 */ 563 void 564 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 565 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 566 int cmd, void *cmdarg, 567 struct inpcb *(*notify) __P((struct inpcb *, int))) 568 { 569 struct inpcbhead *head; 570 struct inpcb *inp, *ninp; 571 struct sockaddr_in6 sa6_src, *sa6_dst; 572 u_short fport = fport_arg, lport = lport_arg; 573 u_int32_t flowinfo; 574 int errno; 575 576 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 577 return; 578 579 sa6_dst = (struct sockaddr_in6 *)dst; 580 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 581 return; 582 583 /* 584 * note that src can be NULL when we get notify by local fragmentation. 585 */ 586 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 587 flowinfo = sa6_src.sin6_flowinfo; 588 589 /* 590 * Redirects go to all references to the destination, 591 * and use in6_rtchange to invalidate the route cache. 592 * Dead host indications: also use in6_rtchange to invalidate 593 * the cache, and deliver the error to all the sockets. 594 * Otherwise, if we have knowledge of the local port and address, 595 * deliver only to that socket. 596 */ 597 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 598 fport = 0; 599 lport = 0; 600 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 601 602 if (cmd != PRC_HOSTDEAD) 603 notify = in6_rtchange; 604 } 605 errno = inet6ctlerrmap[cmd]; 606 head = pcbinfo->ipi_listhead; 607 INP_INFO_WLOCK(pcbinfo); 608 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) { 609 INP_LOCK(inp); 610 ninp = LIST_NEXT(inp, inp_list); 611 612 if ((inp->inp_vflag & INP_IPV6) == 0) { 613 INP_UNLOCK(inp); 614 continue; 615 } 616 617 /* 618 * If the error designates a new path MTU for a destination 619 * and the application (associated with this socket) wanted to 620 * know the value, notify. Note that we notify for all 621 * disconnected sockets if the corresponding application 622 * wanted. This is because some UDP applications keep sending 623 * sockets disconnected. 624 * XXX: should we avoid to notify the value to TCP sockets? 625 */ 626 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 627 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 628 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 629 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 630 (u_int32_t *)cmdarg); 631 } 632 633 /* 634 * Detect if we should notify the error. If no source and 635 * destination ports are specifed, but non-zero flowinfo and 636 * local address match, notify the error. This is the case 637 * when the error is delivered with an encrypted buffer 638 * by ESP. Otherwise, just compare addresses and ports 639 * as usual. 640 */ 641 if (lport == 0 && fport == 0 && flowinfo && 642 inp->inp_socket != NULL && 643 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 644 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 645 goto do_notify; 646 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 647 &sa6_dst->sin6_addr) || 648 inp->inp_socket == 0 || 649 (lport && inp->inp_lport != lport) || 650 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 651 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 652 &sa6_src.sin6_addr)) || 653 (fport && inp->inp_fport != fport)) { 654 INP_UNLOCK(inp); 655 continue; 656 } 657 658 do_notify: 659 if (notify) { 660 if ((*notify)(inp, errno)) 661 INP_UNLOCK(inp); 662 } else 663 INP_UNLOCK(inp); 664 } 665 INP_INFO_WUNLOCK(pcbinfo); 666 } 667 668 /* 669 * Lookup a PCB based on the local address and port. 670 */ 671 struct inpcb * 672 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 673 u_int lport_arg, int wild_okay) 674 { 675 register struct inpcb *inp; 676 int matchwild = 3, wildcard; 677 u_short lport = lport_arg; 678 679 INP_INFO_WLOCK_ASSERT(pcbinfo); 680 681 if (!wild_okay) { 682 struct inpcbhead *head; 683 /* 684 * Look for an unconnected (wildcard foreign addr) PCB that 685 * matches the local address and port we're looking for. 686 */ 687 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 688 0, pcbinfo->ipi_hashmask)]; 689 LIST_FOREACH(inp, head, inp_hash) { 690 if ((inp->inp_vflag & INP_IPV6) == 0) 691 continue; 692 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 693 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 694 inp->inp_lport == lport) { 695 /* 696 * Found. 697 */ 698 return (inp); 699 } 700 } 701 /* 702 * Not found. 703 */ 704 return (NULL); 705 } else { 706 struct inpcbporthead *porthash; 707 struct inpcbport *phd; 708 struct inpcb *match = NULL; 709 /* 710 * Best fit PCB lookup. 711 * 712 * First see if this local port is in use by looking on the 713 * port hash list. 714 */ 715 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 716 pcbinfo->ipi_porthashmask)]; 717 LIST_FOREACH(phd, porthash, phd_hash) { 718 if (phd->phd_port == lport) 719 break; 720 } 721 if (phd != NULL) { 722 /* 723 * Port is in use by one or more PCBs. Look for best 724 * fit. 725 */ 726 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 727 wildcard = 0; 728 if ((inp->inp_vflag & INP_IPV6) == 0) 729 continue; 730 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 731 wildcard++; 732 if (!IN6_IS_ADDR_UNSPECIFIED( 733 &inp->in6p_laddr)) { 734 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 735 wildcard++; 736 else if (!IN6_ARE_ADDR_EQUAL( 737 &inp->in6p_laddr, laddr)) 738 continue; 739 } else { 740 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 741 wildcard++; 742 } 743 if (wildcard < matchwild) { 744 match = inp; 745 matchwild = wildcard; 746 if (matchwild == 0) { 747 break; 748 } 749 } 750 } 751 } 752 return (match); 753 } 754 } 755 756 void 757 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 758 { 759 struct in6pcb *in6p; 760 struct ip6_moptions *im6o; 761 struct in6_multi_mship *imm, *nimm; 762 763 INP_INFO_RLOCK(pcbinfo); 764 LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) { 765 INP_LOCK(in6p); 766 im6o = in6p->in6p_moptions; 767 if ((in6p->inp_vflag & INP_IPV6) && 768 im6o) { 769 /* 770 * Unselect the outgoing interface if it is being 771 * detached. 772 */ 773 if (im6o->im6o_multicast_ifp == ifp) 774 im6o->im6o_multicast_ifp = NULL; 775 776 /* 777 * Drop multicast group membership if we joined 778 * through the interface being detached. 779 * XXX controversial - is it really legal for kernel 780 * to force this? 781 */ 782 for (imm = im6o->im6o_memberships.lh_first; 783 imm != NULL; imm = nimm) { 784 nimm = imm->i6mm_chain.le_next; 785 if (imm->i6mm_maddr->in6m_ifp == ifp) { 786 LIST_REMOVE(imm, i6mm_chain); 787 in6_delmulti(imm->i6mm_maddr); 788 free(imm, M_IP6MADDR); 789 } 790 } 791 } 792 INP_UNLOCK(in6p); 793 } 794 INP_INFO_RUNLOCK(pcbinfo); 795 } 796 797 /* 798 * Check for alternatives when higher level complains 799 * about service problems. For now, invalidate cached 800 * routing information. If the route was created dynamically 801 * (by a redirect), time to try a default gateway again. 802 */ 803 void 804 in6_losing(struct inpcb *in6p) 805 { 806 807 /* 808 * We don't store route pointers in the routing table anymore 809 */ 810 return; 811 } 812 813 /* 814 * After a routing change, flush old routing 815 * and allocate a (hopefully) better one. 816 */ 817 struct inpcb * 818 in6_rtchange(struct inpcb *inp, int errno) 819 { 820 /* 821 * We don't store route pointers in the routing table anymore 822 */ 823 return inp; 824 } 825 826 /* 827 * Lookup PCB in hash list. 828 */ 829 struct inpcb * 830 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 831 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 832 int wildcard, struct ifnet *ifp) 833 { 834 struct inpcbhead *head; 835 register struct inpcb *inp; 836 u_short fport = fport_arg, lport = lport_arg; 837 int faith; 838 839 INP_INFO_RLOCK_ASSERT(pcbinfo); 840 841 if (faithprefix_p != NULL) 842 faith = (*faithprefix_p)(laddr); 843 else 844 faith = 0; 845 846 /* 847 * First look for an exact match. 848 */ 849 head = &pcbinfo->ipi_hashbase[ 850 INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport, 851 pcbinfo->ipi_hashmask)]; 852 LIST_FOREACH(inp, head, inp_hash) { 853 if ((inp->inp_vflag & INP_IPV6) == 0) 854 continue; 855 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 856 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 857 inp->inp_fport == fport && 858 inp->inp_lport == lport) { 859 /* 860 * Found. 861 */ 862 return (inp); 863 } 864 } 865 if (wildcard) { 866 struct inpcb *local_wild = NULL; 867 868 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 869 0, pcbinfo->ipi_hashmask)]; 870 LIST_FOREACH(inp, head, inp_hash) { 871 if ((inp->inp_vflag & INP_IPV6) == 0) 872 continue; 873 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 874 inp->inp_lport == lport) { 875 if (faith && (inp->inp_flags & INP_FAITH) == 0) 876 continue; 877 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 878 laddr)) 879 return (inp); 880 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 881 local_wild = inp; 882 } 883 } 884 return (local_wild); 885 } 886 887 /* 888 * Not found. 889 */ 890 return (NULL); 891 } 892 893 void 894 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 895 { 896 struct ip6_hdr *ip; 897 898 ip = mtod(m, struct ip6_hdr *); 899 bzero(sin6, sizeof(*sin6)); 900 sin6->sin6_len = sizeof(*sin6); 901 sin6->sin6_family = AF_INET6; 902 sin6->sin6_addr = ip->ip6_src; 903 904 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 905 906 return; 907 } 908