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("$FreeBSD$"); 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 #include <netinet/vinet.h> 100 101 #include <netinet6/ip6_var.h> 102 #include <netinet6/nd6.h> 103 #include <netinet/in_pcb.h> 104 #include <netinet6/in6_pcb.h> 105 #include <netinet6/scope6_var.h> 106 #include <netinet6/vinet6.h> 107 108 #include <security/mac/mac_framework.h> 109 110 struct in6_addr zeroin6_addr; 111 112 int 113 in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam, 114 struct ucred *cred) 115 { 116 INIT_VNET_INET6(inp->inp_vnet); 117 INIT_VNET_INET(inp->inp_vnet); 118 struct socket *so = inp->inp_socket; 119 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 120 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 121 u_short lport = 0; 122 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 123 124 INP_INFO_WLOCK_ASSERT(pcbinfo); 125 INP_WLOCK_ASSERT(inp); 126 127 if (!V_in6_ifaddr) /* XXX broken! */ 128 return (EADDRNOTAVAIL); 129 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 130 return (EINVAL); 131 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 132 wild = INPLOOKUP_WILDCARD; 133 if (nam) { 134 int error; 135 136 sin6 = (struct sockaddr_in6 *)nam; 137 if (nam->sa_len != sizeof(*sin6)) 138 return (EINVAL); 139 /* 140 * family check. 141 */ 142 if (nam->sa_family != AF_INET6) 143 return (EAFNOSUPPORT); 144 145 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 146 return(error); 147 148 if (prison_local_ip6(cred, &sin6->sin6_addr, 149 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0)) != 0) 150 return (EINVAL); 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 if (prison_local_ip6(cred, &sin6->sin6_addr, 227 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0)) != 0) 228 return (EADDRNOTAVAIL); 229 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 230 lport, wild, cred); 231 if (t && (reuseport & ((t->inp_vflag & INP_TIMEWAIT) ? 232 intotw(t)->tw_so_options : 233 t->inp_socket->so_options)) == 0) 234 return (EADDRINUSE); 235 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 236 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 237 struct sockaddr_in sin; 238 239 in6_sin6_2_sin(&sin, sin6); 240 t = in_pcblookup_local(pcbinfo, sin.sin_addr, 241 lport, wild, cred); 242 if (t && t->inp_vflag & INP_TIMEWAIT) { 243 if ((reuseport & 244 intotw(t)->tw_so_options) == 0 && 245 (ntohl(t->inp_laddr.s_addr) != 246 INADDR_ANY || ((inp->inp_vflag & 247 INP_IPV6PROTO) == 248 (t->inp_vflag & INP_IPV6PROTO)))) 249 return (EADDRINUSE); 250 } 251 else if (t && 252 (reuseport & t->inp_socket->so_options) 253 == 0 && (ntohl(t->inp_laddr.s_addr) != 254 INADDR_ANY || INP_SOCKAF(so) == 255 INP_SOCKAF(t->inp_socket))) 256 return (EADDRINUSE); 257 } 258 } 259 inp->in6p_laddr = sin6->sin6_addr; 260 } 261 if (prison_local_ip6(cred, &inp->in6p_laddr, 262 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0)) != 0) 263 return (EINVAL); 264 if (lport == 0) { 265 int e; 266 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) 267 return (e); 268 } else { 269 inp->inp_lport = lport; 270 if (in_pcbinshash(inp) != 0) { 271 inp->in6p_laddr = in6addr_any; 272 inp->inp_lport = 0; 273 return (EAGAIN); 274 } 275 } 276 return (0); 277 } 278 279 /* 280 * Transform old in6_pcbconnect() into an inner subroutine for new 281 * in6_pcbconnect(): Do some validity-checking on the remote 282 * address (in mbuf 'nam') and then determine local host address 283 * (i.e., which interface) to use to access that remote host. 284 * 285 * This preserves definition of in6_pcbconnect(), while supporting a 286 * slightly different version for T/TCP. (This is more than 287 * a bit of a kludge, but cleaning up the internal interfaces would 288 * have forced minor changes in every protocol). 289 */ 290 int 291 in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam, 292 struct in6_addr **plocal_addr6) 293 { 294 INIT_VNET_INET6(inp->inp_vnet); 295 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 296 int error = 0; 297 struct ifnet *ifp = NULL; 298 int scope_ambiguous = 0; 299 300 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 301 INP_WLOCK_ASSERT(inp); 302 303 if (nam->sa_len != sizeof (*sin6)) 304 return (EINVAL); 305 if (sin6->sin6_family != AF_INET6) 306 return (EAFNOSUPPORT); 307 if (sin6->sin6_port == 0) 308 return (EADDRNOTAVAIL); 309 310 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 311 scope_ambiguous = 1; 312 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 313 return(error); 314 315 if (V_in6_ifaddr) { 316 /* 317 * If the destination address is UNSPECIFIED addr, 318 * use the loopback addr, e.g ::1. 319 */ 320 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 321 sin6->sin6_addr = in6addr_loopback; 322 } 323 if (prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr) != 0) 324 return (EADDRNOTAVAIL); 325 326 /* 327 * XXX: in6_selectsrc might replace the bound local address 328 * with the address specified by setsockopt(IPV6_PKTINFO). 329 * Is it the intended behavior? 330 */ 331 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 332 inp, NULL, 333 inp->inp_cred, 334 &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 == NULL) { 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 */ 361 int 362 in6_pcbconnect(register struct inpcb *inp, struct sockaddr *nam, 363 struct ucred *cred) 364 { 365 struct in6_addr *addr6; 366 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 367 int error; 368 369 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 370 INP_WLOCK_ASSERT(inp); 371 372 /* 373 * Call inner routine, to assign local interface address. 374 * in6_pcbladdr() may automatically fill in sin6_scope_id. 375 */ 376 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 377 return (error); 378 379 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 380 sin6->sin6_port, 381 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 382 ? addr6 : &inp->in6p_laddr, 383 inp->inp_lport, 0, NULL) != NULL) { 384 return (EADDRINUSE); 385 } 386 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 387 if (inp->inp_lport == 0) { 388 error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 389 if (error) 390 return (error); 391 } 392 inp->in6p_laddr = *addr6; 393 } 394 inp->in6p_faddr = sin6->sin6_addr; 395 inp->inp_fport = sin6->sin6_port; 396 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 397 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 398 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 399 inp->in6p_flowinfo |= 400 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 401 402 in_pcbrehash(inp); 403 404 return (0); 405 } 406 407 void 408 in6_pcbdisconnect(struct inpcb *inp) 409 { 410 411 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 412 INP_WLOCK_ASSERT(inp); 413 414 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 415 inp->inp_fport = 0; 416 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 417 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 418 in_pcbrehash(inp); 419 } 420 421 struct sockaddr * 422 in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 423 { 424 struct sockaddr_in6 *sin6; 425 426 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 427 bzero(sin6, sizeof *sin6); 428 sin6->sin6_family = AF_INET6; 429 sin6->sin6_len = sizeof(*sin6); 430 sin6->sin6_port = port; 431 sin6->sin6_addr = *addr_p; 432 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 433 434 return (struct sockaddr *)sin6; 435 } 436 437 struct sockaddr * 438 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 439 { 440 struct sockaddr_in sin; 441 struct sockaddr_in6 *sin6_p; 442 443 bzero(&sin, sizeof sin); 444 sin.sin_family = AF_INET; 445 sin.sin_len = sizeof(sin); 446 sin.sin_port = port; 447 sin.sin_addr = *addr_p; 448 449 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 450 M_WAITOK); 451 in6_sin_2_v4mapsin6(&sin, sin6_p); 452 453 return (struct sockaddr *)sin6_p; 454 } 455 456 int 457 in6_getsockaddr(struct socket *so, struct sockaddr **nam) 458 { 459 register struct inpcb *inp; 460 struct in6_addr addr; 461 in_port_t port; 462 463 inp = sotoinpcb(so); 464 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 465 466 INP_RLOCK(inp); 467 port = inp->inp_lport; 468 addr = inp->in6p_laddr; 469 INP_RUNLOCK(inp); 470 471 *nam = in6_sockaddr(port, &addr); 472 return 0; 473 } 474 475 int 476 in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 477 { 478 struct inpcb *inp; 479 struct in6_addr addr; 480 in_port_t port; 481 482 inp = sotoinpcb(so); 483 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 484 485 INP_RLOCK(inp); 486 port = inp->inp_fport; 487 addr = inp->in6p_faddr; 488 INP_RUNLOCK(inp); 489 490 *nam = in6_sockaddr(port, &addr); 491 return 0; 492 } 493 494 int 495 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 496 { 497 struct inpcb *inp; 498 int error; 499 500 inp = sotoinpcb(so); 501 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 502 503 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 504 error = in_getsockaddr(so, nam); 505 if (error == 0) 506 in6_sin_2_v4mapsin6_in_sock(nam); 507 } else { 508 /* scope issues will be handled in in6_getsockaddr(). */ 509 error = in6_getsockaddr(so, nam); 510 } 511 512 return error; 513 } 514 515 int 516 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 517 { 518 struct inpcb *inp; 519 int error; 520 521 inp = sotoinpcb(so); 522 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 523 524 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 525 error = in_getpeeraddr(so, nam); 526 if (error == 0) 527 in6_sin_2_v4mapsin6_in_sock(nam); 528 } else 529 /* scope issues will be handled in in6_getpeeraddr(). */ 530 error = in6_getpeeraddr(so, nam); 531 532 return error; 533 } 534 535 /* 536 * Pass some notification to all connections of a protocol 537 * associated with address dst. The local address and/or port numbers 538 * may be specified to limit the search. The "usual action" will be 539 * taken, depending on the ctlinput cmd. The caller must filter any 540 * cmds that are uninteresting (e.g., no error in the map). 541 * Call the protocol specific routine (if any) to report 542 * any errors for each matching socket. 543 */ 544 void 545 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 546 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 547 int cmd, void *cmdarg, 548 struct inpcb *(*notify)(struct inpcb *, int)) 549 { 550 struct inpcb *inp, *inp_temp; 551 struct sockaddr_in6 sa6_src, *sa6_dst; 552 u_short fport = fport_arg, lport = lport_arg; 553 u_int32_t flowinfo; 554 int errno; 555 556 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 557 return; 558 559 sa6_dst = (struct sockaddr_in6 *)dst; 560 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 561 return; 562 563 /* 564 * note that src can be NULL when we get notify by local fragmentation. 565 */ 566 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 567 flowinfo = sa6_src.sin6_flowinfo; 568 569 /* 570 * Redirects go to all references to the destination, 571 * and use in6_rtchange to invalidate the route cache. 572 * Dead host indications: also use in6_rtchange to invalidate 573 * the cache, and deliver the error to all the sockets. 574 * Otherwise, if we have knowledge of the local port and address, 575 * deliver only to that socket. 576 */ 577 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 578 fport = 0; 579 lport = 0; 580 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 581 582 if (cmd != PRC_HOSTDEAD) 583 notify = in6_rtchange; 584 } 585 errno = inet6ctlerrmap[cmd]; 586 INP_INFO_WLOCK(pcbinfo); 587 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 588 INP_WLOCK(inp); 589 if ((inp->inp_vflag & INP_IPV6) == 0) { 590 INP_WUNLOCK(inp); 591 continue; 592 } 593 594 /* 595 * If the error designates a new path MTU for a destination 596 * and the application (associated with this socket) wanted to 597 * know the value, notify. Note that we notify for all 598 * disconnected sockets if the corresponding application 599 * wanted. This is because some UDP applications keep sending 600 * sockets disconnected. 601 * XXX: should we avoid to notify the value to TCP sockets? 602 */ 603 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 604 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 605 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 606 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 607 (u_int32_t *)cmdarg); 608 } 609 610 /* 611 * Detect if we should notify the error. If no source and 612 * destination ports are specifed, but non-zero flowinfo and 613 * local address match, notify the error. This is the case 614 * when the error is delivered with an encrypted buffer 615 * by ESP. Otherwise, just compare addresses and ports 616 * as usual. 617 */ 618 if (lport == 0 && fport == 0 && flowinfo && 619 inp->inp_socket != NULL && 620 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 621 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 622 goto do_notify; 623 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 624 &sa6_dst->sin6_addr) || 625 inp->inp_socket == 0 || 626 (lport && inp->inp_lport != lport) || 627 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 628 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 629 &sa6_src.sin6_addr)) || 630 (fport && inp->inp_fport != fport)) { 631 INP_WUNLOCK(inp); 632 continue; 633 } 634 635 do_notify: 636 if (notify) { 637 if ((*notify)(inp, errno)) 638 INP_WUNLOCK(inp); 639 } else 640 INP_WUNLOCK(inp); 641 } 642 INP_INFO_WUNLOCK(pcbinfo); 643 } 644 645 /* 646 * Lookup a PCB based on the local address and port. 647 */ 648 struct inpcb * 649 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 650 u_short lport, int wild_okay, struct ucred *cred) 651 { 652 register struct inpcb *inp; 653 int matchwild = 3, wildcard; 654 655 INP_INFO_WLOCK_ASSERT(pcbinfo); 656 657 if (!wild_okay) { 658 struct inpcbhead *head; 659 /* 660 * Look for an unconnected (wildcard foreign addr) PCB that 661 * matches the local address and port we're looking for. 662 */ 663 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 664 0, pcbinfo->ipi_hashmask)]; 665 LIST_FOREACH(inp, head, inp_hash) { 666 /* XXX inp locking */ 667 if ((inp->inp_vflag & INP_IPV6) == 0) 668 continue; 669 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 670 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 671 inp->inp_lport == lport) { 672 /* Found. */ 673 if (cred == NULL || 674 inp->inp_cred->cr_prison == cred->cr_prison) 675 return (inp); 676 } 677 } 678 /* 679 * Not found. 680 */ 681 return (NULL); 682 } else { 683 struct inpcbporthead *porthash; 684 struct inpcbport *phd; 685 struct inpcb *match = NULL; 686 /* 687 * Best fit PCB lookup. 688 * 689 * First see if this local port is in use by looking on the 690 * port hash list. 691 */ 692 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 693 pcbinfo->ipi_porthashmask)]; 694 LIST_FOREACH(phd, porthash, phd_hash) { 695 if (phd->phd_port == lport) 696 break; 697 } 698 if (phd != NULL) { 699 /* 700 * Port is in use by one or more PCBs. Look for best 701 * fit. 702 */ 703 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 704 wildcard = 0; 705 if (cred != NULL && 706 inp->inp_cred->cr_prison != cred->cr_prison) 707 continue; 708 /* XXX inp locking */ 709 if ((inp->inp_vflag & INP_IPV6) == 0) 710 continue; 711 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 712 wildcard++; 713 if (!IN6_IS_ADDR_UNSPECIFIED( 714 &inp->in6p_laddr)) { 715 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 716 wildcard++; 717 else if (!IN6_ARE_ADDR_EQUAL( 718 &inp->in6p_laddr, laddr)) 719 continue; 720 } else { 721 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 722 wildcard++; 723 } 724 if (wildcard < matchwild) { 725 match = inp; 726 matchwild = wildcard; 727 if (matchwild == 0) 728 break; 729 } 730 } 731 } 732 return (match); 733 } 734 } 735 736 void 737 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 738 { 739 struct in6pcb *in6p; 740 struct ip6_moptions *im6o; 741 struct in6_multi_mship *imm, *nimm; 742 743 INP_INFO_RLOCK(pcbinfo); 744 LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) { 745 INP_WLOCK(in6p); 746 im6o = in6p->in6p_moptions; 747 if ((in6p->inp_vflag & INP_IPV6) && 748 im6o) { 749 /* 750 * Unselect the outgoing interface if it is being 751 * detached. 752 */ 753 if (im6o->im6o_multicast_ifp == ifp) 754 im6o->im6o_multicast_ifp = NULL; 755 756 /* 757 * Drop multicast group membership if we joined 758 * through the interface being detached. 759 * XXX controversial - is it really legal for kernel 760 * to force this? 761 */ 762 for (imm = im6o->im6o_memberships.lh_first; 763 imm != NULL; imm = nimm) { 764 nimm = imm->i6mm_chain.le_next; 765 if (imm->i6mm_maddr->in6m_ifp == ifp) { 766 LIST_REMOVE(imm, i6mm_chain); 767 in6_delmulti(imm->i6mm_maddr); 768 free(imm, M_IP6MADDR); 769 } 770 } 771 } 772 INP_WUNLOCK(in6p); 773 } 774 INP_INFO_RUNLOCK(pcbinfo); 775 } 776 777 /* 778 * Check for alternatives when higher level complains 779 * about service problems. For now, invalidate cached 780 * routing information. If the route was created dynamically 781 * (by a redirect), time to try a default gateway again. 782 */ 783 void 784 in6_losing(struct inpcb *in6p) 785 { 786 787 /* 788 * We don't store route pointers in the routing table anymore 789 */ 790 return; 791 } 792 793 /* 794 * After a routing change, flush old routing 795 * and allocate a (hopefully) better one. 796 */ 797 struct inpcb * 798 in6_rtchange(struct inpcb *inp, int errno) 799 { 800 /* 801 * We don't store route pointers in the routing table anymore 802 */ 803 return inp; 804 } 805 806 /* 807 * Lookup PCB in hash list. 808 */ 809 struct inpcb * 810 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 811 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, int wildcard, 812 struct ifnet *ifp) 813 { 814 struct inpcbhead *head; 815 struct inpcb *inp, *tmpinp; 816 u_short fport = fport_arg, lport = lport_arg; 817 int faith; 818 819 INP_INFO_LOCK_ASSERT(pcbinfo); 820 821 if (faithprefix_p != NULL) 822 faith = (*faithprefix_p)(laddr); 823 else 824 faith = 0; 825 826 /* 827 * First look for an exact match. 828 */ 829 tmpinp = NULL; 830 head = &pcbinfo->ipi_hashbase[ 831 INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport, 832 pcbinfo->ipi_hashmask)]; 833 LIST_FOREACH(inp, head, inp_hash) { 834 /* XXX inp locking */ 835 if ((inp->inp_vflag & INP_IPV6) == 0) 836 continue; 837 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 838 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 839 inp->inp_fport == fport && 840 inp->inp_lport == lport) { 841 /* 842 * XXX We should be able to directly return 843 * the inp here, without any checks. 844 * Well unless both bound with SO_REUSEPORT? 845 */ 846 if (jailed(inp->inp_cred)) 847 return (inp); 848 if (tmpinp == NULL) 849 tmpinp = inp; 850 } 851 } 852 if (tmpinp != NULL) 853 return (tmpinp); 854 855 /* 856 * Then look for a wildcard match, if requested. 857 */ 858 if (wildcard == INPLOOKUP_WILDCARD) { 859 struct inpcb *local_wild = NULL, *local_exact = NULL; 860 struct inpcb *jail_wild = NULL; 861 int injail; 862 863 /* 864 * Order of socket selection - we always prefer jails. 865 * 1. jailed, non-wild. 866 * 2. jailed, wild. 867 * 3. non-jailed, non-wild. 868 * 4. non-jailed, wild. 869 */ 870 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 871 0, pcbinfo->ipi_hashmask)]; 872 LIST_FOREACH(inp, head, inp_hash) { 873 /* XXX inp locking */ 874 if ((inp->inp_vflag & INP_IPV6) == 0) 875 continue; 876 877 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 878 inp->inp_lport != lport) { 879 continue; 880 } 881 882 /* XXX inp locking */ 883 if (faith && (inp->inp_flags & INP_FAITH) == 0) 884 continue; 885 886 injail = jailed(inp->inp_cred); 887 if (injail) { 888 if (!prison_check_ip6(inp->inp_cred, laddr)) 889 continue; 890 } else { 891 if (local_exact != NULL) 892 continue; 893 } 894 895 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 896 if (injail) 897 return (inp); 898 else 899 local_exact = inp; 900 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 901 if (injail) 902 jail_wild = inp; 903 else 904 local_wild = inp; 905 } 906 } /* LIST_FOREACH */ 907 908 if (jail_wild != NULL) 909 return (jail_wild); 910 if (local_exact != NULL) 911 return (local_exact); 912 if (local_wild != NULL) 913 return (local_wild); 914 } /* if (wildcard == INPLOOKUP_WILDCARD) */ 915 916 /* 917 * Not found. 918 */ 919 return (NULL); 920 } 921 922 void 923 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 924 { 925 struct ip6_hdr *ip; 926 927 ip = mtod(m, struct ip6_hdr *); 928 bzero(sin6, sizeof(*sin6)); 929 sin6->sin6_len = sizeof(*sin6); 930 sin6->sin6_family = AF_INET6; 931 sin6->sin6_addr = ip->ip6_src; 932 933 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 934 935 return; 936 } 937