1 /* $FreeBSD: src/sys/netinet6/in6_pcb.c,v 1.10.2.9 2003/01/24 05:11:35 sam Exp $ */ 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 * 3. 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/proc.h> 81 #include <sys/priv.h> 82 #include <sys/jail.h> 83 84 #include <sys/thread2.h> 85 #include <sys/msgport2.h> 86 87 #include <vm/vm_zone.h> 88 89 #include <net/if.h> 90 #include <net/if_types.h> 91 #include <net/route.h> 92 #include <net/netisr2.h> 93 94 #include <netinet/in.h> 95 #include <netinet/in_var.h> 96 #include <netinet/in_systm.h> 97 #include <netinet/ip6.h> 98 #include <netinet/ip_var.h> 99 #include <netinet6/ip6_var.h> 100 #include <netinet6/nd6.h> 101 #include <netinet/in_pcb.h> 102 #include <netinet6/in6_pcb.h> 103 104 #ifdef IPSEC 105 #include <netinet6/ipsec.h> 106 #ifdef INET6 107 #include <netinet6/ipsec6.h> 108 #endif 109 #include <netinet6/ah.h> 110 #ifdef INET6 111 #include <netinet6/ah6.h> 112 #endif 113 #include <netproto/key/key.h> 114 #endif /* IPSEC */ 115 116 #ifdef FAST_IPSEC 117 #include <netproto/ipsec/ipsec.h> 118 #include <netproto/ipsec/ipsec6.h> 119 #include <netproto/ipsec/key.h> 120 #define IPSEC 121 #endif /* FAST_IPSEC */ 122 123 struct in6_addr zeroin6_addr; 124 125 int 126 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 127 { 128 struct socket *so = inp->inp_socket; 129 struct sockaddr_in6 jsin6; 130 int error; 131 132 if (!in6_ifaddr) /* XXX broken! */ 133 return (EADDRNOTAVAIL); 134 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 135 return (EINVAL); 136 137 if (nam) { 138 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 139 struct inpcbinfo *pcbinfo; 140 struct inpcbportinfo *portinfo; 141 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 142 struct ucred *cred = NULL; 143 struct inpcb *t; 144 u_short lport, lport_ho; 145 146 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 147 wild = 1; 148 if (td->td_proc != NULL) 149 cred = td->td_proc->p_ucred; 150 151 if (nam->sa_len != sizeof(*sin6)) 152 return (EINVAL); 153 /* 154 * family check. 155 */ 156 if (nam->sa_family != AF_INET6) 157 return (EAFNOSUPPORT); 158 159 if (!prison_replace_wildcards(td, nam)) 160 return (EINVAL); 161 162 /* KAME hack: embed scopeid */ 163 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0) 164 return (EINVAL); 165 /* this must be cleared for ifa_ifwithaddr() */ 166 sin6->sin6_scope_id = 0; 167 168 lport = sin6->sin6_port; 169 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 170 /* 171 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 172 * allow compepte duplication of binding if 173 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 174 * and a multicast address is bound on both 175 * new and duplicated sockets. 176 */ 177 if (so->so_options & SO_REUSEADDR) 178 reuseport = SO_REUSEADDR|SO_REUSEPORT; 179 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 180 struct ifaddr *ia = NULL; 181 182 sin6->sin6_port = 0; /* yech... */ 183 if (!prison_replace_wildcards(td, (struct sockaddr *)sin6)) { 184 sin6->sin6_addr = kin6addr_any; 185 return (EINVAL); 186 } 187 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == NULL) 188 return (EADDRNOTAVAIL); 189 190 /* 191 * XXX: bind to an anycast address might accidentally 192 * cause sending a packet with anycast source address. 193 * We should allow to bind to a deprecated address, since 194 * the application dare to use it. 195 */ 196 if (ia && 197 ((struct in6_ifaddr *)ia)->ia6_flags & 198 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) 199 return (EADDRNOTAVAIL); 200 } 201 202 inp->in6p_laddr = sin6->sin6_addr; 203 204 if (lport == 0) 205 goto auto_select; 206 lport_ho = ntohs(lport); 207 208 /* GROSS */ 209 if (lport_ho < IPV6PORT_RESERVED && cred && 210 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0)) { 211 inp->in6p_laddr = kin6addr_any; 212 return (EACCES); 213 } 214 215 /* 216 * Locate the proper portinfo based on lport 217 */ 218 pcbinfo = inp->inp_pcbinfo; 219 portinfo = 220 &pcbinfo->portinfo[lport_ho & pcbinfo->portinfo_mask]; 221 KKASSERT((lport_ho & pcbinfo->portinfo_mask) == 222 portinfo->offset); 223 224 /* 225 * This has to be atomic. If the porthash is shared across 226 * multiple protocol threads (aka tcp) then the token must 227 * be held. 228 */ 229 GET_PORT_TOKEN(portinfo); 230 231 if (so->so_cred->cr_uid != 0 && 232 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 233 t = in6_pcblookup_local(portinfo, 234 &sin6->sin6_addr, lport, INPLOOKUP_WILDCARD, cred); 235 if (t && 236 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 237 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 238 (t->inp_socket->so_options & SO_REUSEPORT) == 0) && 239 (so->so_cred->cr_uid != 240 t->inp_socket->so_cred->cr_uid)) { 241 inp->in6p_laddr = kin6addr_any; 242 error = EADDRINUSE; 243 goto done; 244 } 245 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 246 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 247 struct sockaddr_in sin; 248 249 in6_sin6_2_sin(&sin, sin6); 250 t = in_pcblookup_local(portinfo, 251 sin.sin_addr, lport, 252 INPLOOKUP_WILDCARD, cred); 253 if (t && 254 (so->so_cred->cr_uid != 255 t->inp_socket->so_cred->cr_uid) && 256 (ntohl(t->inp_laddr.s_addr) != INADDR_ANY || 257 INP_SOCKAF(so) == 258 INP_SOCKAF(t->inp_socket))) { 259 inp->in6p_laddr = kin6addr_any; 260 error = EADDRINUSE; 261 goto done; 262 } 263 } 264 } 265 if (cred && cred->cr_prison && 266 !prison_replace_wildcards(td, nam)) { 267 inp->in6p_laddr = kin6addr_any; 268 error = EADDRNOTAVAIL; 269 goto done; 270 } 271 t = in6_pcblookup_local(portinfo, &sin6->sin6_addr, lport, 272 wild, cred); 273 if (t && (reuseport & t->inp_socket->so_options) == 0) { 274 inp->in6p_laddr = kin6addr_any; 275 error = EADDRINUSE; 276 goto done; 277 } 278 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 279 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 280 struct sockaddr_in sin; 281 282 in6_sin6_2_sin(&sin, sin6); 283 t = in_pcblookup_local(portinfo, sin.sin_addr, lport, 284 wild, cred); 285 if (t && (reuseport & t->inp_socket->so_options) == 0 && 286 (ntohl(t->inp_laddr.s_addr) != INADDR_ANY || 287 INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))) { 288 inp->in6p_laddr = kin6addr_any; 289 error = EADDRINUSE; 290 goto done; 291 } 292 } 293 294 inp->inp_lport = lport; 295 in_pcbinsporthash(portinfo, inp); 296 error = 0; 297 done: 298 REL_PORT_TOKEN(portinfo); 299 return (error); 300 } else { 301 auto_select: 302 jsin6.sin6_addr = inp->in6p_laddr; 303 jsin6.sin6_family = AF_INET6; 304 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin6)) { 305 inp->in6p_laddr = kin6addr_any; 306 inp->inp_lport = 0; 307 return (EINVAL); 308 } 309 310 return in6_pcbsetlport(&inp->in6p_laddr, inp, td); 311 } 312 } 313 314 /* 315 * Transform old in6_pcbconnect() into an inner subroutine for new 316 * in6_pcbconnect(): Do some validity-checking on the remote 317 * address (in mbuf 'nam') and then determine local host address 318 * (i.e., which interface) to use to access that remote host. 319 * 320 * This preserves definition of in6_pcbconnect(), while supporting a 321 * slightly different version for T/TCP. (This is more than 322 * a bit of a kludge, but cleaning up the internal interfaces would 323 * have forced minor changes in every protocol). 324 */ 325 326 int 327 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam, 328 struct in6_addr **plocal_addr6, struct thread *td) 329 { 330 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 331 struct ifnet *ifp = NULL; 332 int error = 0; 333 334 if (nam->sa_len != sizeof (*sin6)) 335 return (EINVAL); 336 if (sin6->sin6_family != AF_INET6) 337 return (EAFNOSUPPORT); 338 if (sin6->sin6_port == 0) 339 return (EADDRNOTAVAIL); 340 341 /* KAME hack: embed scopeid */ 342 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0) 343 return EINVAL; 344 345 if (in6_ifaddr) { 346 /* 347 * If the destination address is UNSPECIFIED addr, 348 * use the loopback addr, e.g ::1. 349 */ 350 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 351 sin6->sin6_addr = kin6addr_loopback; 352 } 353 { 354 /* 355 * XXX: in6_selectsrc might replace the bound local address 356 * with the address specified by setsockopt(IPV6_PKTINFO). 357 * Is it the intended behavior? 358 */ 359 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 360 inp->in6p_moptions, 361 &inp->in6p_route, 362 &inp->in6p_laddr, &error, td); 363 if (*plocal_addr6 == NULL) { 364 if (error == 0) 365 error = EADDRNOTAVAIL; 366 return (error); 367 } 368 /* 369 * Don't do pcblookup call here; return interface in 370 * plocal_addr6 371 * and exit to caller, that will do the lookup. 372 */ 373 } 374 375 if (inp->in6p_route.ro_rt) 376 ifp = inp->in6p_route.ro_rt->rt_ifp; 377 378 return (0); 379 } 380 381 /* 382 * Outer subroutine: 383 * Connect from a socket to a specified address. 384 * Both address and port must be specified in argument sin. 385 * If don't have a local address for this socket yet, 386 * then pick one. 387 */ 388 int 389 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 390 { 391 struct in6_addr *addr6; 392 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 393 int error; 394 395 /* 396 * Call inner routine, to assign local interface address. 397 * in6_pcbladdr() may automatically fill in sin6_scope_id. 398 */ 399 if ((error = in6_pcbladdr(inp, nam, &addr6, td)) != 0) 400 return (error); 401 402 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 403 sin6->sin6_port, 404 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 405 ? addr6 : &inp->in6p_laddr, 406 inp->inp_lport, 0, NULL) != NULL) { 407 return (EADDRINUSE); 408 } 409 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 410 if (inp->inp_lport == 0) { 411 error = in6_pcbbind(inp, NULL, td); 412 if (error) 413 return (error); 414 } 415 inp->in6p_laddr = *addr6; 416 } 417 inp->in6p_faddr = sin6->sin6_addr; 418 inp->inp_fport = sin6->sin6_port; 419 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 420 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 421 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 422 inp->in6p_flowinfo |= 423 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK); 424 425 in_pcbinsconnhash(inp); 426 return (0); 427 } 428 429 #if 0 430 /* 431 * Return an IPv6 address, which is the most appropriate for given 432 * destination and user specified options. 433 * If necessary, this function lookups the routing table and return 434 * an entry to the caller for later use. 435 */ 436 struct in6_addr * 437 in6_selectsrc(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts, 438 struct ip6_moptions *mopts, struct route_in6 *ro, 439 struct in6_addr *laddr, int *errorp, struct thread *td) 440 { 441 struct sockaddr_in6 jsin6; 442 struct ucred *cred = NULL; 443 struct in6_addr *dst; 444 struct in6_ifaddr *ia6 = 0; 445 struct in6_pktinfo *pi = NULL; 446 int jailed = 0; 447 448 if (td && td->td_proc && td->td_proc->p_ucred) 449 cred = td->td_proc->p_ucred; 450 if (cred && cred->cr_prison) 451 jailed = 1; 452 jsin6.sin6_family = AF_INET6; 453 dst = &dstsock->sin6_addr; 454 *errorp = 0; 455 456 /* 457 * If the source address is explicitly specified by the caller, 458 * use it. 459 */ 460 if (opts && (pi = opts->ip6po_pktinfo) && 461 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) { 462 jsin6.sin6_addr = pi->ipi6_addr; 463 if (jailed && !jailed_ip(cred->cr_prison, 464 (struct sockaddr *)&jsin6)) { 465 return(0); 466 } else { 467 return (&pi->ipi6_addr); 468 } 469 } 470 471 /* 472 * If the source address is not specified but the socket(if any) 473 * is already bound, use the bound address. 474 */ 475 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) { 476 jsin6.sin6_addr = *laddr; 477 if (jailed && !jailed_ip(cred->cr_prison, 478 (struct sockaddr *)&jsin6)) { 479 return(0); 480 } else { 481 return (laddr); 482 } 483 } 484 485 /* 486 * If the caller doesn't specify the source address but 487 * the outgoing interface, use an address associated with 488 * the interface. 489 */ 490 if (pi && pi->ipi6_ifindex) { 491 /* XXX boundary check is assumed to be already done. */ 492 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], 493 dst, cred); 494 495 if (ia6 && jailed) { 496 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 497 if (!jailed_ip(cred->cr_prison, 498 (struct sockaddr *)&jsin6)) 499 ia6 = 0; 500 } 501 502 if (ia6 == 0) { 503 *errorp = EADDRNOTAVAIL; 504 return (0); 505 } 506 return (&satosin6(&ia6->ia_addr)->sin6_addr); 507 } 508 509 /* 510 * If the destination address is a link-local unicast address or 511 * a multicast address, and if the outgoing interface is specified 512 * by the sin6_scope_id filed, use an address associated with the 513 * interface. 514 * XXX: We're now trying to define more specific semantics of 515 * sin6_scope_id field, so this part will be rewritten in 516 * the near future. 517 */ 518 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) && 519 dstsock->sin6_scope_id) { 520 /* 521 * I'm not sure if boundary check for scope_id is done 522 * somewhere... 523 */ 524 if (dstsock->sin6_scope_id < 0 || 525 if_index < dstsock->sin6_scope_id) { 526 *errorp = ENXIO; /* XXX: better error? */ 527 return (0); 528 } 529 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id], 530 dst, cred); 531 532 if (ia6 && jailed) { 533 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 534 if (!jailed_ip(cred->cr_prison, 535 (struct sockaddr *)&jsin6)) 536 ia6 = 0; 537 } 538 539 if (ia6 == 0) { 540 *errorp = EADDRNOTAVAIL; 541 return (0); 542 } 543 return (&satosin6(&ia6->ia_addr)->sin6_addr); 544 } 545 546 /* 547 * If the destination address is a multicast address and 548 * the outgoing interface for the address is specified 549 * by the caller, use an address associated with the interface. 550 * There is a sanity check here; if the destination has node-local 551 * scope, the outgoing interfacde should be a loopback address. 552 * Even if the outgoing interface is not specified, we also 553 * choose a loopback interface as the outgoing interface. 554 */ 555 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) { 556 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 557 558 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 559 ifp = &loif[0]; 560 } 561 562 if (ifp) { 563 ia6 = in6_ifawithscope(ifp, dst, cred); 564 if (ia6 == 0) { 565 *errorp = EADDRNOTAVAIL; 566 return (0); 567 } 568 return (&ia6->ia_addr.sin6_addr); 569 } 570 } 571 572 /* 573 * If the next hop address for the packet is specified 574 * by caller, use an address associated with the route 575 * to the next hop. 576 */ 577 { 578 struct sockaddr_in6 *sin6_next; 579 struct rtentry *rt; 580 581 if (opts && opts->ip6po_nexthop) { 582 sin6_next = satosin6(opts->ip6po_nexthop); 583 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 584 if (rt) { 585 ia6 = in6_ifawithscope(rt->rt_ifp, dst, cred); 586 if (ia6 == 0) 587 ia6 = ifatoia6(rt->rt_ifa); 588 } 589 if (ia6 && jailed) { 590 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 591 if (!jailed_ip(cred->cr_prison, 592 (struct sockaddr *)&jsin6)) 593 ia6 = 0; 594 } 595 596 if (ia6 == 0) { 597 *errorp = EADDRNOTAVAIL; 598 return (0); 599 } 600 return (&satosin6(&ia6->ia_addr)->sin6_addr); 601 } 602 } 603 604 /* 605 * If route is known or can be allocated now, 606 * our src addr is taken from the i/f, else punt. 607 */ 608 if (ro) { 609 if (ro->ro_rt && 610 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 611 RTFREE(ro->ro_rt); 612 ro->ro_rt = NULL; 613 } 614 if (ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL) { 615 struct sockaddr_in6 *dst6; 616 617 /* No route yet, so try to acquire one */ 618 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 619 dst6 = &ro->ro_dst; 620 dst6->sin6_family = AF_INET6; 621 dst6->sin6_len = sizeof(struct sockaddr_in6); 622 dst6->sin6_addr = *dst; 623 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) { 624 ro->ro_rt = 625 rtpurelookup((struct sockaddr *)&ro->ro_dst); 626 } else { 627 rtalloc((struct route *)ro); 628 } 629 } 630 631 /* 632 * in_pcbconnect() checks out IFF_LOOPBACK to skip using 633 * the address. But we don't know why it does so. 634 * It is necessary to ensure the scope even for lo0 635 * so doesn't check out IFF_LOOPBACK. 636 */ 637 638 if (ro->ro_rt) { 639 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst, cred); 640 if (ia6 && jailed) { 641 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 642 if (!jailed_ip(cred->cr_prison, 643 (struct sockaddr *)&jsin6)) 644 ia6 = 0; 645 } 646 647 if (ia6 == 0) /* xxx scope error ?*/ 648 ia6 = ifatoia6(ro->ro_rt->rt_ifa); 649 650 if (ia6 && jailed) { 651 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 652 if (!jailed_ip(cred->cr_prison, 653 (struct sockaddr *)&jsin6)) 654 ia6 = 0; 655 } 656 } 657 if (ia6 == 0) { 658 *errorp = EHOSTUNREACH; /* no route */ 659 return (0); 660 } 661 return (&satosin6(&ia6->ia_addr)->sin6_addr); 662 } 663 664 *errorp = EADDRNOTAVAIL; 665 return (0); 666 } 667 668 /* 669 * Default hop limit selection. The precedence is as follows: 670 * 1. Hoplimit valued specified via ioctl. 671 * 2. (If the outgoing interface is detected) the current 672 * hop limit of the interface specified by router advertisement. 673 * 3. The system default hoplimit. 674 */ 675 int 676 in6_selecthlim(struct in6pcb *in6p, struct ifnet *ifp) 677 { 678 if (in6p && in6p->in6p_hops >= 0) 679 return (in6p->in6p_hops); 680 else if (ifp) 681 return (ND_IFINFO(ifp)->chlim); 682 else 683 return (ip6_defhlim); 684 } 685 #endif 686 687 void 688 in6_pcbdisconnect(struct inpcb *inp) 689 { 690 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 691 inp->inp_fport = 0; 692 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 693 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 694 in_pcbremconnhash(inp); 695 if (inp->inp_socket->so_state & SS_NOFDREF) 696 in6_pcbdetach(inp); 697 } 698 699 void 700 in6_pcbdetach(struct inpcb *inp) 701 { 702 struct socket *so = inp->inp_socket; 703 struct inpcbinfo *ipi = inp->inp_pcbinfo; 704 705 #ifdef IPSEC 706 if (inp->in6p_sp != NULL) 707 ipsec6_delete_pcbpolicy(inp); 708 #endif /* IPSEC */ 709 inp->inp_gencnt = ++ipi->ipi_gencnt; 710 in_pcbremlists(inp); 711 so->so_pcb = NULL; 712 KKASSERT((so->so_state & SS_ASSERTINPROG) == 0); 713 sofree(so); /* remove pcb ref */ 714 715 if (inp->in6p_options) 716 m_freem(inp->in6p_options); 717 ip6_freepcbopts(inp->in6p_outputopts); 718 ip6_freemoptions(inp->in6p_moptions); 719 if (inp->in6p_route.ro_rt) 720 rtfree(inp->in6p_route.ro_rt); 721 /* Check and free IPv4 related resources in case of mapped addr */ 722 if (inp->inp_options) 723 m_free(inp->inp_options); 724 ip_freemoptions(inp->inp_moptions); 725 726 inp->inp_vflag = 0; 727 kfree(inp, M_PCB); 728 } 729 730 /* 731 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was 732 * modified to match the pru_sockaddr() and pru_peeraddr() entry points 733 * in struct pr_usrreqs, so that protocols can just reference then directly 734 * without the need for a wrapper function. The socket must have a valid 735 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 736 * except through a kernel programming error, so it is acceptable to panic 737 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 738 * because there actually /is/ a programming error somewhere... XXX) 739 */ 740 void 741 in6_setsockaddr_dispatch(netmsg_t msg) 742 { 743 int error; 744 745 error = in6_setsockaddr(msg->sockaddr.base.nm_so, msg->sockaddr.nm_nam); 746 lwkt_replymsg(&msg->sockaddr.base.lmsg, error); 747 } 748 749 int 750 in6_setsockaddr(struct socket *so, struct sockaddr **nam) 751 { 752 struct inpcb *inp; 753 struct sockaddr_in6 *sin6; 754 755 /* 756 * Do the malloc first in case it blocks. 757 */ 758 sin6 = kmalloc(sizeof *sin6, M_SONAME, M_WAITOK | M_ZERO); 759 sin6->sin6_family = AF_INET6; 760 sin6->sin6_len = sizeof(*sin6); 761 762 crit_enter(); 763 inp = so->so_pcb; 764 if (!inp) { 765 crit_exit(); 766 kfree(sin6, M_SONAME); 767 return EINVAL; 768 } 769 sin6->sin6_port = inp->inp_lport; 770 sin6->sin6_addr = inp->in6p_laddr; 771 crit_exit(); 772 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 773 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 774 else 775 sin6->sin6_scope_id = 0; /*XXX*/ 776 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 777 sin6->sin6_addr.s6_addr16[1] = 0; 778 779 *nam = (struct sockaddr *)sin6; 780 return 0; 781 } 782 783 void 784 in6_setpeeraddr_dispatch(netmsg_t msg) 785 { 786 int error; 787 788 error = in6_setpeeraddr(msg->peeraddr.base.nm_so, msg->peeraddr.nm_nam); 789 lwkt_replymsg(&msg->peeraddr.base.lmsg, error); 790 } 791 792 int 793 in6_setpeeraddr(struct socket *so, struct sockaddr **nam) 794 { 795 struct inpcb *inp; 796 struct sockaddr_in6 *sin6; 797 798 /* 799 * Do the malloc first in case it blocks. 800 */ 801 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO); 802 sin6->sin6_family = AF_INET6; 803 sin6->sin6_len = sizeof(struct sockaddr_in6); 804 805 crit_enter(); 806 inp = so->so_pcb; 807 if (!inp) { 808 crit_exit(); 809 kfree(sin6, M_SONAME); 810 return EINVAL; 811 } 812 sin6->sin6_port = inp->inp_fport; 813 sin6->sin6_addr = inp->in6p_faddr; 814 crit_exit(); 815 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 816 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 817 else 818 sin6->sin6_scope_id = 0; /*XXX*/ 819 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 820 sin6->sin6_addr.s6_addr16[1] = 0; 821 822 *nam = (struct sockaddr *)sin6; 823 return 0; 824 } 825 826 void 827 in6_mapped_sockaddr_dispatch(netmsg_t msg) 828 { 829 int error; 830 831 error = in6_mapped_sockaddr(msg->sockaddr.base.nm_so, 832 msg->sockaddr.nm_nam); 833 lwkt_replymsg(&msg->sockaddr.base.lmsg, error); 834 } 835 836 int 837 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 838 { 839 struct inpcb *inp = so->so_pcb; 840 int error; 841 842 if (inp == NULL) 843 return EINVAL; 844 if (inp->inp_vflag & INP_IPV4) { 845 error = in_setsockaddr(so, nam); 846 if (error == 0) 847 in6_sin_2_v4mapsin6_in_sock(nam); 848 } else 849 /* scope issues will be handled in in6_setsockaddr(). */ 850 error = in6_setsockaddr(so, nam); 851 852 return error; 853 } 854 855 int 856 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 857 { 858 struct inpcb *inp = so->so_pcb; 859 int error; 860 861 if (inp == NULL) 862 return EINVAL; 863 if (inp->inp_vflag & INP_IPV4) { 864 error = in_setpeeraddr(so, nam); 865 if (error == 0) 866 in6_sin_2_v4mapsin6_in_sock(nam); 867 } else 868 /* scope issues will be handled in in6_setpeeraddr(). */ 869 error = in6_setpeeraddr(so, nam); 870 871 return error; 872 } 873 874 void 875 in6_mapped_peeraddr_dispatch(netmsg_t msg) 876 { 877 int error; 878 879 error = in6_mapped_peeraddr(msg->base.nm_so, msg->peeraddr.nm_nam); 880 lwkt_replymsg(&msg->base.lmsg, error); 881 } 882 883 /* 884 * Pass some notification to all connections of a protocol 885 * associated with address dst. The local address and/or port numbers 886 * may be specified to limit the search. The "usual action" will be 887 * taken, depending on the ctlinput cmd. The caller must filter any 888 * cmds that are uninteresting (e.g., no error in the map). 889 * Call the protocol specific routine (if any) to report 890 * any errors for each matching socket. 891 */ 892 void 893 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, in_port_t fport, 894 const struct sockaddr *src, in_port_t lport, int cmd, int arg, 895 void (*notify) (struct inpcb *, int)) 896 { 897 struct inpcb *inp, *marker; 898 struct sockaddr_in6 sa6_src, *sa6_dst; 899 u_int32_t flowinfo; 900 901 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 902 return; 903 904 sa6_dst = (struct sockaddr_in6 *)dst; 905 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 906 return; 907 908 /* 909 * note that src can be NULL when we get notify by local fragmentation. 910 */ 911 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 912 flowinfo = sa6_src.sin6_flowinfo; 913 914 /* 915 * Redirects go to all references to the destination, 916 * and use in6_rtchange to invalidate the route cache. 917 * Dead host indications: also use in6_rtchange to invalidate 918 * the cache, and deliver the error to all the sockets. 919 * Otherwise, if we have knowledge of the local port and address, 920 * deliver only to that socket. 921 */ 922 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 923 fport = 0; 924 lport = 0; 925 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 926 927 if (cmd != PRC_HOSTDEAD) 928 notify = in6_rtchange; 929 } 930 if (cmd != PRC_MSGSIZE) 931 arg = inet6ctlerrmap[cmd]; 932 933 marker = in_pcbmarker(mycpuid); 934 935 GET_PCBINFO_TOKEN(pcbinfo); 936 937 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 938 while ((inp = LIST_NEXT(marker, inp_list)) != NULL) { 939 LIST_REMOVE(marker, inp_list); 940 LIST_INSERT_AFTER(inp, marker, inp_list); 941 942 if (inp->inp_flags & INP_PLACEMARKER) 943 continue; 944 945 if ((inp->inp_vflag & INP_IPV6) == 0) 946 continue; 947 /* 948 * If the error designates a new path MTU for a destination 949 * and the application (associated with this socket) wanted to 950 * know the value, notify. Note that we notify for all 951 * disconnected sockets if the corresponding application 952 * wanted. This is because some UDP applications keep sending 953 * sockets disconnected. 954 * XXX: should we avoid to notify the value to TCP sockets? 955 */ 956 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 957 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 958 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 959 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, &arg); 960 } 961 962 /* 963 * Detect if we should notify the error. If no source and 964 * destination ports are specifed, but non-zero flowinfo and 965 * local address match, notify the error. This is the case 966 * when the error is delivered with an encrypted buffer 967 * by ESP. Otherwise, just compare addresses and ports 968 * as usual. 969 */ 970 if (lport == 0 && fport == 0 && flowinfo && 971 inp->inp_socket != NULL && 972 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 973 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 974 goto do_notify; 975 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 976 &sa6_dst->sin6_addr) || 977 inp->inp_socket == 0 || 978 (lport && inp->inp_lport != lport) || 979 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 980 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 981 &sa6_src.sin6_addr)) || 982 (fport && inp->inp_fport != fport)) 983 continue; 984 985 do_notify: 986 if (notify) 987 (*notify)(inp, arg); 988 } 989 LIST_REMOVE(marker, inp_list); 990 991 REL_PCBINFO_TOKEN(pcbinfo); 992 } 993 994 /* 995 * Lookup a PCB based on the local address and port. 996 */ 997 struct inpcb * 998 in6_pcblookup_local(struct inpcbportinfo *portinfo, 999 const struct in6_addr *laddr, u_int lport_arg, int wild_okay, 1000 struct ucred *cred) 1001 { 1002 struct inpcb *inp; 1003 int matchwild = 3, wildcard; 1004 u_short lport = lport_arg; 1005 struct inpcbporthead *porthash; 1006 struct inpcbport *phd; 1007 struct inpcb *match = NULL; 1008 1009 /* 1010 * If the porthashbase is shared across several cpus, it must 1011 * have been locked. 1012 */ 1013 ASSERT_PORT_TOKEN_HELD(portinfo); 1014 1015 /* 1016 * Best fit PCB lookup. 1017 * 1018 * First see if this local port is in use by looking on the 1019 * port hash list. 1020 */ 1021 porthash = &portinfo->porthashbase[ 1022 INP_PCBPORTHASH(lport, portinfo->porthashmask)]; 1023 LIST_FOREACH(phd, porthash, phd_hash) { 1024 if (phd->phd_port == lport) 1025 break; 1026 } 1027 1028 if (phd != NULL) { 1029 /* 1030 * Port is in use by one or more PCBs. Look for best 1031 * fit. 1032 */ 1033 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 1034 wildcard = 0; 1035 if ((inp->inp_vflag & INP_IPV6) == 0) 1036 continue; 1037 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 1038 wildcard++; 1039 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1040 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 1041 wildcard++; 1042 else if (!IN6_ARE_ADDR_EQUAL( 1043 &inp->in6p_laddr, laddr)) 1044 continue; 1045 } else { 1046 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 1047 wildcard++; 1048 } 1049 if (wildcard && !wild_okay) 1050 continue; 1051 if (wildcard < matchwild && 1052 (cred == NULL || 1053 cred->cr_prison == 1054 inp->inp_socket->so_cred->cr_prison)) { 1055 match = inp; 1056 matchwild = wildcard; 1057 if (wildcard == 0) 1058 break; 1059 else 1060 matchwild = wildcard; 1061 } 1062 } 1063 } 1064 return (match); 1065 } 1066 1067 void 1068 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 1069 { 1070 struct in6pcb *in6p, *marker; 1071 struct ip6_moptions *im6o; 1072 struct in6_multi_mship *imm, *nimm; 1073 1074 /* 1075 * We only need to make sure that we are in netisr0, where all 1076 * multicast operation happen. We could check inpcbinfo which 1077 * does not belong to netisr0 by holding the inpcbinfo's token. 1078 * In this case, the pcbinfo must be able to be shared, i.e. 1079 * pcbinfo->infotoken is not NULL. 1080 */ 1081 KASSERT(&curthread->td_msgport == netisr_cpuport(0), 1082 ("not in netisr0")); 1083 KASSERT(pcbinfo->cpu == 0 || pcbinfo->infotoken != NULL, 1084 ("pcbinfo could not be shared")); 1085 1086 /* 1087 * Get a marker for the current netisr (netisr0). 1088 * 1089 * It is possible that the multicast address deletion blocks, 1090 * which could cause temporary token releasing. So we use 1091 * inpcb marker here to get a coherent view of the inpcb list. 1092 * 1093 * While, on the other hand, moptions are only added and deleted 1094 * in netisr0, so we would not see staled moption or miss moption 1095 * even if the token was released due to the blocking multicast 1096 * address deletion. 1097 */ 1098 marker = in_pcbmarker(mycpuid); 1099 1100 GET_PCBINFO_TOKEN(pcbinfo); 1101 1102 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 1103 while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) { 1104 LIST_REMOVE(marker, inp_list); 1105 LIST_INSERT_AFTER(in6p, marker, inp_list); 1106 1107 if (in6p->in6p_flags & INP_PLACEMARKER) 1108 continue; 1109 im6o = in6p->in6p_moptions; 1110 if ((in6p->inp_vflag & INP_IPV6) && 1111 im6o) { 1112 /* 1113 * Unselect the outgoing interface if it is being 1114 * detached. 1115 */ 1116 if (im6o->im6o_multicast_ifp == ifp) 1117 im6o->im6o_multicast_ifp = NULL; 1118 1119 /* 1120 * Drop multicast group membership if we joined 1121 * through the interface being detached. 1122 * XXX controversial - is it really legal for kernel 1123 * to force this? 1124 */ 1125 for (imm = im6o->im6o_memberships.lh_first; 1126 imm != NULL; imm = nimm) { 1127 nimm = imm->i6mm_chain.le_next; 1128 if (imm->i6mm_maddr->in6m_ifp == ifp) { 1129 LIST_REMOVE(imm, i6mm_chain); 1130 in6_delmulti(imm->i6mm_maddr); 1131 kfree(imm, M_IPMADDR); 1132 } 1133 } 1134 } 1135 } 1136 LIST_REMOVE(marker, inp_list); 1137 1138 REL_PCBINFO_TOKEN(pcbinfo); 1139 } 1140 1141 /* 1142 * Check for alternatives when higher level complains 1143 * about service problems. For now, invalidate cached 1144 * routing information. If the route was created dynamically 1145 * (by a redirect), time to try a default gateway again. 1146 */ 1147 void 1148 in6_losing(struct inpcb *in6p) 1149 { 1150 struct rtentry *rt; 1151 struct rt_addrinfo info; 1152 1153 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 1154 bzero((caddr_t)&info, sizeof(info)); 1155 info.rti_flags = rt->rt_flags; 1156 info.rti_info[RTAX_DST] = rt_key(rt); 1157 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1158 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1159 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 1160 if (rt->rt_flags & RTF_DYNAMIC) { 1161 rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1162 rt_mask(rt), rt->rt_flags, NULL); 1163 } 1164 in6p->in6p_route.ro_rt = NULL; 1165 rtfree(rt); 1166 /* 1167 * A new route can be allocated 1168 * the next time output is attempted. 1169 */ 1170 } 1171 } 1172 1173 /* 1174 * After a routing change, flush old routing 1175 * and allocate a (hopefully) better one. 1176 */ 1177 void 1178 in6_rtchange(struct inpcb *inp, int error) 1179 { 1180 if (inp->in6p_route.ro_rt) { 1181 rtfree(inp->in6p_route.ro_rt); 1182 inp->in6p_route.ro_rt = 0; 1183 /* 1184 * A new route can be allocated the next time 1185 * output is attempted. 1186 */ 1187 } 1188 } 1189 1190 /* 1191 * Lookup PCB in hash list. 1192 */ 1193 struct inpcb * 1194 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1195 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1196 int wildcard, struct ifnet *ifp) 1197 { 1198 struct inpcbhead *head; 1199 struct inpcb *inp; 1200 struct inpcb *jinp = NULL; 1201 u_short fport = fport_arg, lport = lport_arg; 1202 int faith; 1203 1204 if (faithprefix_p != NULL) 1205 faith = (*faithprefix_p)(laddr); 1206 else 1207 faith = 0; 1208 1209 /* 1210 * First look for an exact match. 1211 */ 1212 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */, 1213 fport, 1214 laddr->s6_addr32[3], /* XXX JH */ 1215 lport, 1216 pcbinfo->hashmask)]; 1217 LIST_FOREACH(inp, head, inp_hash) { 1218 if ((inp->inp_vflag & INP_IPV6) == 0) 1219 continue; 1220 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1221 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1222 inp->inp_fport == fport && 1223 inp->inp_lport == lport) { 1224 /* 1225 * Found. 1226 */ 1227 if (inp->inp_socket == NULL || 1228 inp->inp_socket->so_cred->cr_prison == NULL) { 1229 return (inp); 1230 } else { 1231 if (jinp == NULL) 1232 jinp = inp; 1233 } 1234 } 1235 } 1236 if (jinp != NULL) 1237 return(jinp); 1238 1239 if (wildcard) { 1240 struct inpcontainerhead *chead; 1241 struct inpcontainer *ic; 1242 struct inpcb *local_wild = NULL; 1243 struct inpcb *jinp_wild = NULL; 1244 struct sockaddr_in6 jsin6; 1245 struct ucred *cred; 1246 1247 /* 1248 * Order of socket selection: 1249 * 1. non-jailed, non-wild. 1250 * 2. non-jailed, wild. 1251 * 3. jailed, non-wild. 1252 * 4. jailed, wild. 1253 */ 1254 jsin6.sin6_family = AF_INET6; 1255 chead = &pcbinfo->wildcardhashbase[INP_PCBWILDCARDHASH(lport, 1256 pcbinfo->wildcardhashmask)]; 1257 1258 GET_PCBINFO_TOKEN(pcbinfo); 1259 LIST_FOREACH(ic, chead, ic_list) { 1260 inp = ic->ic_inp; 1261 if (inp->inp_flags & INP_PLACEMARKER) 1262 continue; 1263 1264 if (!(inp->inp_vflag & INP_IPV6)) 1265 continue; 1266 if (inp->inp_socket != NULL) 1267 cred = inp->inp_socket->so_cred; 1268 else 1269 cred = NULL; 1270 1271 if (cred != NULL && jailed(cred)) { 1272 if (jinp != NULL) { 1273 continue; 1274 } else { 1275 jsin6.sin6_addr = *laddr; 1276 if (!jailed_ip(cred->cr_prison, 1277 (struct sockaddr *)&jsin6)) 1278 continue; 1279 } 1280 } 1281 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 1282 inp->inp_lport == lport) { 1283 if (faith && (inp->inp_flags & INP_FAITH) == 0) 1284 continue; 1285 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 1286 laddr)) { 1287 if (cred != NULL && jailed(cred)) { 1288 jinp = inp; 1289 } else { 1290 REL_PCBINFO_TOKEN(pcbinfo); 1291 return (inp); 1292 } 1293 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1294 if (cred != NULL && jailed(cred)) 1295 jinp_wild = inp; 1296 else 1297 local_wild = inp; 1298 } 1299 } 1300 } 1301 REL_PCBINFO_TOKEN(pcbinfo); 1302 1303 if (local_wild != NULL) 1304 return (local_wild); 1305 if (jinp != NULL) 1306 return (jinp); 1307 return (jinp_wild); 1308 } 1309 1310 /* 1311 * Not found. 1312 */ 1313 return (NULL); 1314 } 1315 1316 void 1317 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 1318 { 1319 struct ip6_hdr *ip; 1320 1321 ip = mtod(m, struct ip6_hdr *); 1322 bzero(sin6, sizeof(*sin6)); 1323 sin6->sin6_len = sizeof(*sin6); 1324 sin6->sin6_family = AF_INET6; 1325 sin6->sin6_addr = ip->ip6_src; 1326 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1327 sin6->sin6_addr.s6_addr16[1] = 0; 1328 sin6->sin6_scope_id = 1329 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1330 ? m->m_pkthdr.rcvif->if_index : 0; 1331 1332 return; 1333 } 1334 1335 static void 1336 in6_savefaddr(struct socket *so, const struct sockaddr *faddr) 1337 { 1338 struct sockaddr_in6 *sin6; 1339 1340 KASSERT(faddr->sa_family == AF_INET6, 1341 ("not AF_INET6 faddr %d", faddr->sa_family)); 1342 1343 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO); 1344 sin6->sin6_family = AF_INET6; 1345 sin6->sin6_len = sizeof(*sin6); 1346 1347 sin6->sin6_port = ((const struct sockaddr_in6 *)faddr)->sin6_port; 1348 sin6->sin6_addr = ((const struct sockaddr_in6 *)faddr)->sin6_addr; 1349 1350 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1351 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 1352 else 1353 sin6->sin6_scope_id = 0; /*XXX*/ 1354 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1355 sin6->sin6_addr.s6_addr16[1] = 0; 1356 1357 so->so_faddr = (struct sockaddr *)sin6; 1358 } 1359 1360 void 1361 in6_mapped_savefaddr(struct socket *so, const struct sockaddr *faddr) 1362 { 1363 if (faddr->sa_family == AF_INET) { 1364 in_savefaddr(so, faddr); 1365 in6_sin_2_v4mapsin6_in_sock(&so->so_faddr); 1366 } else { 1367 in6_savefaddr(so, faddr); 1368 } 1369 } 1370