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 93 #include <netinet/in.h> 94 #include <netinet/in_var.h> 95 #include <netinet/in_systm.h> 96 #include <netinet/ip6.h> 97 #include <netinet/ip_var.h> 98 #include <netinet6/ip6_var.h> 99 #include <netinet6/nd6.h> 100 #include <netinet/in_pcb.h> 101 #include <netinet6/in6_pcb.h> 102 103 #ifdef IPSEC 104 #include <netinet6/ipsec.h> 105 #ifdef INET6 106 #include <netinet6/ipsec6.h> 107 #endif 108 #include <netinet6/ah.h> 109 #ifdef INET6 110 #include <netinet6/ah6.h> 111 #endif 112 #include <netproto/key/key.h> 113 #endif /* IPSEC */ 114 115 #ifdef FAST_IPSEC 116 #include <netproto/ipsec/ipsec.h> 117 #include <netproto/ipsec/ipsec6.h> 118 #include <netproto/ipsec/key.h> 119 #define IPSEC 120 #endif /* FAST_IPSEC */ 121 122 struct in6_addr zeroin6_addr; 123 124 int 125 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 126 { 127 struct socket *so = inp->inp_socket; 128 struct sockaddr_in6 *sin6 = NULL; 129 struct sockaddr_in6 jsin6; 130 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 131 struct proc *p = td->td_proc; 132 struct ucred *cred = NULL; 133 u_short lport = 0; 134 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 135 136 if (!in6_ifaddr) /* XXX broken! */ 137 return (EADDRNOTAVAIL); 138 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 139 return (EINVAL); 140 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 141 wild = 1; 142 if (p) 143 cred = p->p_ucred; 144 if (nam) { 145 sin6 = (struct sockaddr_in6 *)nam; 146 if (nam->sa_len != sizeof(*sin6)) 147 return (EINVAL); 148 /* 149 * family check. 150 */ 151 if (nam->sa_family != AF_INET6) 152 return (EAFNOSUPPORT); 153 154 if (!prison_replace_wildcards(td, nam)) 155 return (EINVAL); 156 157 /* KAME hack: embed scopeid */ 158 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0) 159 return EINVAL; 160 /* this must be cleared for ifa_ifwithaddr() */ 161 sin6->sin6_scope_id = 0; 162 163 lport = sin6->sin6_port; 164 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 165 /* 166 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 167 * allow compepte duplication of binding if 168 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 169 * and a multicast address is bound on both 170 * new and duplicated sockets. 171 */ 172 if (so->so_options & SO_REUSEADDR) 173 reuseport = SO_REUSEADDR|SO_REUSEPORT; 174 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 175 struct ifaddr *ia = NULL; 176 177 sin6->sin6_port = 0; /* yech... */ 178 if (!prison_replace_wildcards(td, (struct sockaddr *)sin6)) { 179 sin6->sin6_addr = kin6addr_any; 180 return(EINVAL); 181 } 182 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == NULL) 183 return (EADDRNOTAVAIL); 184 185 /* 186 * XXX: bind to an anycast address might accidentally 187 * cause sending a packet with anycast source address. 188 * We should allow to bind to a deprecated address, since 189 * the application dare to use it. 190 */ 191 if (ia && 192 ((struct in6_ifaddr *)ia)->ia6_flags & 193 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 194 return (EADDRNOTAVAIL); 195 } 196 } 197 if (lport) { 198 struct inpcb *t; 199 200 /* GROSS */ 201 if (ntohs(lport) < IPV6PORT_RESERVED && cred && 202 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0)) 203 return (EACCES); 204 if (so->so_cred->cr_uid != 0 && 205 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 206 t = in6_pcblookup_local(pcbinfo, 207 &sin6->sin6_addr, lport, 208 INPLOOKUP_WILDCARD, cred); 209 if (t && 210 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 211 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 212 (t->inp_socket->so_options & 213 SO_REUSEPORT) == 0) && 214 (so->so_cred->cr_uid != 215 t->inp_socket->so_cred->cr_uid)) 216 return (EADDRINUSE); 217 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 218 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 219 struct sockaddr_in sin; 220 221 in6_sin6_2_sin(&sin, sin6); 222 t = in_pcblookup_local(pcbinfo, 223 sin.sin_addr, lport, 224 INPLOOKUP_WILDCARD, cred); 225 if (t && 226 (so->so_cred->cr_uid != 227 t->inp_socket->so_cred->cr_uid) && 228 (ntohl(t->inp_laddr.s_addr) != 229 INADDR_ANY || 230 INP_SOCKAF(so) == 231 INP_SOCKAF(t->inp_socket))) 232 return (EADDRINUSE); 233 } 234 } 235 if (cred && cred->cr_prison && 236 !prison_replace_wildcards(td, nam)) 237 return(EADDRNOTAVAIL); 238 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 239 lport, wild, cred); 240 if (t && (reuseport & t->inp_socket->so_options) == 0) 241 return (EADDRINUSE); 242 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 243 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 244 struct sockaddr_in sin; 245 246 in6_sin6_2_sin(&sin, sin6); 247 t = in_pcblookup_local(pcbinfo, 248 sin.sin_addr, lport, 249 wild, cred); 250 if (t && 251 (reuseport & t->inp_socket->so_options) 252 == 0 && 253 (ntohl(t->inp_laddr.s_addr) 254 != INADDR_ANY || 255 INP_SOCKAF(so) == 256 INP_SOCKAF(t->inp_socket))) 257 return (EADDRINUSE); 258 } 259 } 260 inp->in6p_laddr = sin6->sin6_addr; 261 } 262 if (lport == 0) { 263 int e; 264 265 jsin6.sin6_addr = inp->in6p_laddr; 266 jsin6.sin6_family = AF_INET6; 267 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin6)) { 268 inp->in6p_laddr = kin6addr_any; 269 inp->inp_lport = 0; 270 return (EINVAL); 271 } 272 273 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, td)) != 0) 274 return (e); 275 } 276 else { 277 inp->inp_lport = lport; 278 if (in_pcbinsporthash(inp) != 0) { 279 inp->in6p_laddr = kin6addr_any; 280 inp->inp_lport = 0; 281 return (EAGAIN); 282 } 283 } 284 return (0); 285 } 286 287 /* 288 * Transform old in6_pcbconnect() into an inner subroutine for new 289 * in6_pcbconnect(): Do some validity-checking on the remote 290 * address (in mbuf 'nam') and then determine local host address 291 * (i.e., which interface) to use to access that remote host. 292 * 293 * This preserves definition of in6_pcbconnect(), while supporting a 294 * slightly different version for T/TCP. (This is more than 295 * a bit of a kludge, but cleaning up the internal interfaces would 296 * have forced minor changes in every protocol). 297 */ 298 299 int 300 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam, 301 struct in6_addr **plocal_addr6, struct thread *td) 302 { 303 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 304 struct ifnet *ifp = NULL; 305 int error = 0; 306 307 if (nam->sa_len != sizeof (*sin6)) 308 return (EINVAL); 309 if (sin6->sin6_family != AF_INET6) 310 return (EAFNOSUPPORT); 311 if (sin6->sin6_port == 0) 312 return (EADDRNOTAVAIL); 313 314 /* KAME hack: embed scopeid */ 315 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0) 316 return EINVAL; 317 318 if (in6_ifaddr) { 319 /* 320 * If the destination address is UNSPECIFIED addr, 321 * use the loopback addr, e.g ::1. 322 */ 323 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 324 sin6->sin6_addr = kin6addr_loopback; 325 } 326 { 327 /* 328 * XXX: in6_selectsrc might replace the bound local address 329 * with the address specified by setsockopt(IPV6_PKTINFO). 330 * Is it the intended behavior? 331 */ 332 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 333 inp->in6p_moptions, 334 &inp->in6p_route, 335 &inp->in6p_laddr, &error, td); 336 if (*plocal_addr6 == NULL) { 337 if (error == 0) 338 error = EADDRNOTAVAIL; 339 return (error); 340 } 341 /* 342 * Don't do pcblookup call here; return interface in 343 * plocal_addr6 344 * and exit to caller, that will do the lookup. 345 */ 346 } 347 348 if (inp->in6p_route.ro_rt) 349 ifp = inp->in6p_route.ro_rt->rt_ifp; 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(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 363 { 364 struct in6_addr *addr6; 365 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 366 int error; 367 368 /* 369 * Call inner routine, to assign local interface address. 370 * in6_pcbladdr() may automatically fill in sin6_scope_id. 371 */ 372 if ((error = in6_pcbladdr(inp, nam, &addr6, td)) != 0) 373 return (error); 374 375 if (in6_pcblookup_hash(inp->inp_cpcbinfo, &sin6->sin6_addr, 376 sin6->sin6_port, 377 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 378 ? addr6 : &inp->in6p_laddr, 379 inp->inp_lport, 0, NULL) != NULL) { 380 return (EADDRINUSE); 381 } 382 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 383 if (inp->inp_lport == 0) { 384 error = in6_pcbbind(inp, NULL, td); 385 if (error) 386 return (error); 387 } 388 inp->in6p_laddr = *addr6; 389 } 390 inp->in6p_faddr = sin6->sin6_addr; 391 inp->inp_fport = sin6->sin6_port; 392 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 393 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 394 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 395 inp->in6p_flowinfo |= 396 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK); 397 398 in_pcbinsconnhash(inp); 399 return (0); 400 } 401 402 #if 0 403 /* 404 * Return an IPv6 address, which is the most appropriate for given 405 * destination and user specified options. 406 * If necessary, this function lookups the routing table and return 407 * an entry to the caller for later use. 408 */ 409 struct in6_addr * 410 in6_selectsrc(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts, 411 struct ip6_moptions *mopts, struct route_in6 *ro, 412 struct in6_addr *laddr, int *errorp, struct thread *td) 413 { 414 struct sockaddr_in6 jsin6; 415 struct ucred *cred = NULL; 416 struct in6_addr *dst; 417 struct in6_ifaddr *ia6 = 0; 418 struct in6_pktinfo *pi = NULL; 419 int jailed = 0; 420 421 if (td && td->td_proc && td->td_proc->p_ucred) 422 cred = td->td_proc->p_ucred; 423 if (cred && cred->cr_prison) 424 jailed = 1; 425 jsin6.sin6_family = AF_INET6; 426 dst = &dstsock->sin6_addr; 427 *errorp = 0; 428 429 /* 430 * If the source address is explicitly specified by the caller, 431 * use it. 432 */ 433 if (opts && (pi = opts->ip6po_pktinfo) && 434 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) { 435 jsin6.sin6_addr = pi->ipi6_addr; 436 if (jailed && !jailed_ip(cred->cr_prison, 437 (struct sockaddr *)&jsin6)) { 438 return(0); 439 } else { 440 return (&pi->ipi6_addr); 441 } 442 } 443 444 /* 445 * If the source address is not specified but the socket(if any) 446 * is already bound, use the bound address. 447 */ 448 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) { 449 jsin6.sin6_addr = *laddr; 450 if (jailed && !jailed_ip(cred->cr_prison, 451 (struct sockaddr *)&jsin6)) { 452 return(0); 453 } else { 454 return (laddr); 455 } 456 } 457 458 /* 459 * If the caller doesn't specify the source address but 460 * the outgoing interface, use an address associated with 461 * the interface. 462 */ 463 if (pi && pi->ipi6_ifindex) { 464 /* XXX boundary check is assumed to be already done. */ 465 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], 466 dst); 467 468 if (ia6 && jailed) { 469 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 470 if (!jailed_ip(cred->cr_prison, 471 (struct sockaddr *)&jsin6)) 472 ia6 = 0; 473 } 474 475 if (ia6 == 0) { 476 *errorp = EADDRNOTAVAIL; 477 return (0); 478 } 479 return (&satosin6(&ia6->ia_addr)->sin6_addr); 480 } 481 482 /* 483 * If the destination address is a link-local unicast address or 484 * a multicast address, and if the outgoing interface is specified 485 * by the sin6_scope_id filed, use an address associated with the 486 * interface. 487 * XXX: We're now trying to define more specific semantics of 488 * sin6_scope_id field, so this part will be rewritten in 489 * the near future. 490 */ 491 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) && 492 dstsock->sin6_scope_id) { 493 /* 494 * I'm not sure if boundary check for scope_id is done 495 * somewhere... 496 */ 497 if (dstsock->sin6_scope_id < 0 || 498 if_index < dstsock->sin6_scope_id) { 499 *errorp = ENXIO; /* XXX: better error? */ 500 return (0); 501 } 502 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id], 503 dst); 504 505 if (ia6 && jailed) { 506 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 507 if (!jailed_ip(cred->cr_prison, 508 (struct sockaddr *)&jsin6)) 509 ia6 = 0; 510 } 511 512 if (ia6 == 0) { 513 *errorp = EADDRNOTAVAIL; 514 return (0); 515 } 516 return (&satosin6(&ia6->ia_addr)->sin6_addr); 517 } 518 519 /* 520 * If the destination address is a multicast address and 521 * the outgoing interface for the address is specified 522 * by the caller, use an address associated with the interface. 523 * There is a sanity check here; if the destination has node-local 524 * scope, the outgoing interfacde should be a loopback address. 525 * Even if the outgoing interface is not specified, we also 526 * choose a loopback interface as the outgoing interface. 527 */ 528 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) { 529 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 530 531 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 532 ifp = &loif[0]; 533 } 534 535 if (ifp) { 536 ia6 = in6_ifawithscope(ifp, dst); 537 if (ia6 == 0) { 538 *errorp = EADDRNOTAVAIL; 539 return (0); 540 } 541 return (&ia6->ia_addr.sin6_addr); 542 } 543 } 544 545 /* 546 * If the next hop address for the packet is specified 547 * by caller, use an address associated with the route 548 * to the next hop. 549 */ 550 { 551 struct sockaddr_in6 *sin6_next; 552 struct rtentry *rt; 553 554 if (opts && opts->ip6po_nexthop) { 555 sin6_next = satosin6(opts->ip6po_nexthop); 556 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 557 if (rt) { 558 ia6 = in6_ifawithscope(rt->rt_ifp, dst); 559 if (ia6 == 0) 560 ia6 = ifatoia6(rt->rt_ifa); 561 } 562 if (ia6 && jailed) { 563 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 564 if (!jailed_ip(cred->cr_prison, 565 (struct sockaddr *)&jsin6)) 566 ia6 = 0; 567 } 568 569 if (ia6 == 0) { 570 *errorp = EADDRNOTAVAIL; 571 return (0); 572 } 573 return (&satosin6(&ia6->ia_addr)->sin6_addr); 574 } 575 } 576 577 /* 578 * If route is known or can be allocated now, 579 * our src addr is taken from the i/f, else punt. 580 */ 581 if (ro) { 582 if (ro->ro_rt && 583 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 584 RTFREE(ro->ro_rt); 585 ro->ro_rt = NULL; 586 } 587 if (ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL) { 588 struct sockaddr_in6 *dst6; 589 590 /* No route yet, so try to acquire one */ 591 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 592 dst6 = &ro->ro_dst; 593 dst6->sin6_family = AF_INET6; 594 dst6->sin6_len = sizeof(struct sockaddr_in6); 595 dst6->sin6_addr = *dst; 596 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) { 597 ro->ro_rt = 598 rtpurelookup((struct sockaddr *)&ro->ro_dst); 599 } else { 600 rtalloc((struct route *)ro); 601 } 602 } 603 604 /* 605 * in_pcbconnect() checks out IFF_LOOPBACK to skip using 606 * the address. But we don't know why it does so. 607 * It is necessary to ensure the scope even for lo0 608 * so doesn't check out IFF_LOOPBACK. 609 */ 610 611 if (ro->ro_rt) { 612 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); 613 if (ia6 && jailed) { 614 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 615 if (!jailed_ip(cred->cr_prison, 616 (struct sockaddr *)&jsin6)) 617 ia6 = 0; 618 } 619 620 if (ia6 == 0) /* xxx scope error ?*/ 621 ia6 = ifatoia6(ro->ro_rt->rt_ifa); 622 623 if (ia6 && jailed) { 624 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 625 if (!jailed_ip(cred->cr_prison, 626 (struct sockaddr *)&jsin6)) 627 ia6 = 0; 628 } 629 } 630 if (ia6 == 0) { 631 *errorp = EHOSTUNREACH; /* no route */ 632 return (0); 633 } 634 return (&satosin6(&ia6->ia_addr)->sin6_addr); 635 } 636 637 *errorp = EADDRNOTAVAIL; 638 return (0); 639 } 640 641 /* 642 * Default hop limit selection. The precedence is as follows: 643 * 1. Hoplimit valued specified via ioctl. 644 * 2. (If the outgoing interface is detected) the current 645 * hop limit of the interface specified by router advertisement. 646 * 3. The system default hoplimit. 647 */ 648 int 649 in6_selecthlim(struct in6pcb *in6p, struct ifnet *ifp) 650 { 651 if (in6p && in6p->in6p_hops >= 0) 652 return (in6p->in6p_hops); 653 else if (ifp) 654 return (ND_IFINFO(ifp)->chlim); 655 else 656 return (ip6_defhlim); 657 } 658 #endif 659 660 void 661 in6_pcbdisconnect(struct inpcb *inp) 662 { 663 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 664 inp->inp_fport = 0; 665 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 666 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 667 in_pcbremconnhash(inp); 668 if (inp->inp_socket->so_state & SS_NOFDREF) 669 in6_pcbdetach(inp); 670 } 671 672 void 673 in6_pcbdetach(struct inpcb *inp) 674 { 675 struct socket *so = inp->inp_socket; 676 struct inpcbinfo *ipi = inp->inp_pcbinfo; 677 678 #ifdef IPSEC 679 if (inp->in6p_sp != NULL) 680 ipsec6_delete_pcbpolicy(inp); 681 #endif /* IPSEC */ 682 inp->inp_gencnt = ++ipi->ipi_gencnt; 683 in_pcbremlists(inp); 684 so->so_pcb = NULL; 685 KKASSERT((so->so_state & SS_ASSERTINPROG) == 0); 686 sofree(so); /* remove pcb ref */ 687 688 if (inp->in6p_options) 689 m_freem(inp->in6p_options); 690 ip6_freepcbopts(inp->in6p_outputopts); 691 ip6_freemoptions(inp->in6p_moptions); 692 if (inp->in6p_route.ro_rt) 693 rtfree(inp->in6p_route.ro_rt); 694 /* Check and free IPv4 related resources in case of mapped addr */ 695 if (inp->inp_options) 696 m_free(inp->inp_options); 697 ip_freemoptions(inp->inp_moptions); 698 699 inp->inp_vflag = 0; 700 kfree(inp, M_PCB); 701 } 702 703 /* 704 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was 705 * modified to match the pru_sockaddr() and pru_peeraddr() entry points 706 * in struct pr_usrreqs, so that protocols can just reference then directly 707 * without the need for a wrapper function. The socket must have a valid 708 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 709 * except through a kernel programming error, so it is acceptable to panic 710 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 711 * because there actually /is/ a programming error somewhere... XXX) 712 */ 713 void 714 in6_setsockaddr_dispatch(netmsg_t msg) 715 { 716 int error; 717 718 error = in6_setsockaddr(msg->sockaddr.base.nm_so, msg->sockaddr.nm_nam); 719 lwkt_replymsg(&msg->sockaddr.base.lmsg, error); 720 } 721 722 int 723 in6_setsockaddr(struct socket *so, struct sockaddr **nam) 724 { 725 struct inpcb *inp; 726 struct sockaddr_in6 *sin6; 727 728 /* 729 * Do the malloc first in case it blocks. 730 */ 731 sin6 = kmalloc(sizeof *sin6, M_SONAME, M_WAITOK | M_ZERO); 732 sin6->sin6_family = AF_INET6; 733 sin6->sin6_len = sizeof(*sin6); 734 735 crit_enter(); 736 inp = so->so_pcb; 737 if (!inp) { 738 crit_exit(); 739 kfree(sin6, M_SONAME); 740 return EINVAL; 741 } 742 sin6->sin6_port = inp->inp_lport; 743 sin6->sin6_addr = inp->in6p_laddr; 744 crit_exit(); 745 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 746 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 747 else 748 sin6->sin6_scope_id = 0; /*XXX*/ 749 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 750 sin6->sin6_addr.s6_addr16[1] = 0; 751 752 *nam = (struct sockaddr *)sin6; 753 return 0; 754 } 755 756 void 757 in6_setpeeraddr_dispatch(netmsg_t msg) 758 { 759 int error; 760 761 error = in6_setpeeraddr(msg->peeraddr.base.nm_so, msg->peeraddr.nm_nam); 762 lwkt_replymsg(&msg->peeraddr.base.lmsg, error); 763 } 764 765 int 766 in6_setpeeraddr(struct socket *so, struct sockaddr **nam) 767 { 768 struct inpcb *inp; 769 struct sockaddr_in6 *sin6; 770 771 /* 772 * Do the malloc first in case it blocks. 773 */ 774 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO); 775 sin6->sin6_family = AF_INET6; 776 sin6->sin6_len = sizeof(struct sockaddr_in6); 777 778 crit_enter(); 779 inp = so->so_pcb; 780 if (!inp) { 781 crit_exit(); 782 kfree(sin6, M_SONAME); 783 return EINVAL; 784 } 785 sin6->sin6_port = inp->inp_fport; 786 sin6->sin6_addr = inp->in6p_faddr; 787 crit_exit(); 788 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 789 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 790 else 791 sin6->sin6_scope_id = 0; /*XXX*/ 792 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 793 sin6->sin6_addr.s6_addr16[1] = 0; 794 795 *nam = (struct sockaddr *)sin6; 796 return 0; 797 } 798 799 void 800 in6_mapped_sockaddr_dispatch(netmsg_t msg) 801 { 802 int error; 803 804 error = in6_mapped_sockaddr(msg->sockaddr.base.nm_so, 805 msg->sockaddr.nm_nam); 806 lwkt_replymsg(&msg->sockaddr.base.lmsg, error); 807 } 808 809 int 810 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 811 { 812 struct inpcb *inp = so->so_pcb; 813 int error; 814 815 if (inp == NULL) 816 return EINVAL; 817 if (inp->inp_vflag & INP_IPV4) { 818 error = in_setsockaddr(so, nam); 819 if (error == 0) 820 in6_sin_2_v4mapsin6_in_sock(nam); 821 } else 822 /* scope issues will be handled in in6_setsockaddr(). */ 823 error = in6_setsockaddr(so, nam); 824 825 return error; 826 } 827 828 int 829 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 830 { 831 struct inpcb *inp = so->so_pcb; 832 int error; 833 834 if (inp == NULL) 835 return EINVAL; 836 if (inp->inp_vflag & INP_IPV4) { 837 error = in_setpeeraddr(so, nam); 838 if (error == 0) 839 in6_sin_2_v4mapsin6_in_sock(nam); 840 } else 841 /* scope issues will be handled in in6_setpeeraddr(). */ 842 error = in6_setpeeraddr(so, nam); 843 844 return error; 845 } 846 847 void 848 in6_mapped_peeraddr_dispatch(netmsg_t msg) 849 { 850 int error; 851 852 error = in6_mapped_peeraddr(msg->base.nm_so, msg->peeraddr.nm_nam); 853 lwkt_replymsg(&msg->base.lmsg, error); 854 } 855 856 /* 857 * Pass some notification to all connections of a protocol 858 * associated with address dst. The local address and/or port numbers 859 * may be specified to limit the search. The "usual action" will be 860 * taken, depending on the ctlinput cmd. The caller must filter any 861 * cmds that are uninteresting (e.g., no error in the map). 862 * Call the protocol specific routine (if any) to report 863 * any errors for each matching socket. 864 * 865 * Must be called under crit_enter(). 866 */ 867 void 868 in6_pcbnotify(struct inpcbhead *head, struct sockaddr *dst, in_port_t fport, 869 const struct sockaddr *src, in_port_t lport, int cmd, int arg, 870 void (*notify) (struct inpcb *, int)) 871 { 872 struct inpcb *inp, *ninp; 873 struct sockaddr_in6 sa6_src, *sa6_dst; 874 u_int32_t flowinfo; 875 876 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 877 return; 878 879 sa6_dst = (struct sockaddr_in6 *)dst; 880 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 881 return; 882 883 /* 884 * note that src can be NULL when we get notify by local fragmentation. 885 */ 886 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 887 flowinfo = sa6_src.sin6_flowinfo; 888 889 /* 890 * Redirects go to all references to the destination, 891 * and use in6_rtchange to invalidate the route cache. 892 * Dead host indications: also use in6_rtchange to invalidate 893 * the cache, and deliver the error to all the sockets. 894 * Otherwise, if we have knowledge of the local port and address, 895 * deliver only to that socket. 896 */ 897 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 898 fport = 0; 899 lport = 0; 900 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 901 902 if (cmd != PRC_HOSTDEAD) 903 notify = in6_rtchange; 904 } 905 if (cmd != PRC_MSGSIZE) 906 arg = inet6ctlerrmap[cmd]; 907 crit_enter(); 908 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) { 909 ninp = LIST_NEXT(inp, inp_list); 910 911 if (inp->inp_flags & INP_PLACEMARKER) 912 continue; 913 914 if ((inp->inp_vflag & INP_IPV6) == 0) 915 continue; 916 /* 917 * If the error designates a new path MTU for a destination 918 * and the application (associated with this socket) wanted to 919 * know the value, notify. Note that we notify for all 920 * disconnected sockets if the corresponding application 921 * wanted. This is because some UDP applications keep sending 922 * sockets disconnected. 923 * XXX: should we avoid to notify the value to TCP sockets? 924 */ 925 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 926 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 927 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 928 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, &arg); 929 } 930 931 /* 932 * Detect if we should notify the error. If no source and 933 * destination ports are specifed, but non-zero flowinfo and 934 * local address match, notify the error. This is the case 935 * when the error is delivered with an encrypted buffer 936 * by ESP. Otherwise, just compare addresses and ports 937 * as usual. 938 */ 939 if (lport == 0 && fport == 0 && flowinfo && 940 inp->inp_socket != NULL && 941 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 942 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 943 goto do_notify; 944 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 945 &sa6_dst->sin6_addr) || 946 inp->inp_socket == 0 || 947 (lport && inp->inp_lport != lport) || 948 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 949 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 950 &sa6_src.sin6_addr)) || 951 (fport && inp->inp_fport != fport)) 952 continue; 953 954 do_notify: 955 if (notify) 956 (*notify)(inp, arg); 957 } 958 crit_exit(); 959 } 960 961 /* 962 * Lookup a PCB based on the local address and port. 963 */ 964 struct inpcb * 965 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 966 u_int lport_arg, int wild_okay, struct ucred *cred) 967 { 968 struct inpcb *inp; 969 int matchwild = 3, wildcard; 970 u_short lport = lport_arg; 971 struct inpcbporthead *porthash; 972 struct inpcbport *phd; 973 struct inpcb *match = NULL; 974 975 /* 976 * If the porthashbase is shared across several cpus we need 977 * to lock. 978 */ 979 if (pcbinfo->porttoken) 980 lwkt_gettoken(pcbinfo->porttoken); 981 982 /* 983 * Best fit PCB lookup. 984 * 985 * First see if this local port is in use by looking on the 986 * port hash list. 987 */ 988 porthash = &pcbinfo->porthashbase[ 989 INP_PCBPORTHASH(lport, pcbinfo->porthashmask)]; 990 LIST_FOREACH(phd, porthash, phd_hash) { 991 if (phd->phd_port == lport) 992 break; 993 } 994 995 if (phd != NULL) { 996 /* 997 * Port is in use by one or more PCBs. Look for best 998 * fit. 999 */ 1000 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 1001 wildcard = 0; 1002 if ((inp->inp_vflag & INP_IPV6) == 0) 1003 continue; 1004 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 1005 wildcard++; 1006 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1007 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 1008 wildcard++; 1009 else if (!IN6_ARE_ADDR_EQUAL( 1010 &inp->in6p_laddr, laddr)) 1011 continue; 1012 } else { 1013 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 1014 wildcard++; 1015 } 1016 if (wildcard && !wild_okay) 1017 continue; 1018 if (wildcard < matchwild && 1019 (cred == NULL || 1020 cred->cr_prison == 1021 inp->inp_socket->so_cred->cr_prison)) { 1022 match = inp; 1023 matchwild = wildcard; 1024 if (wildcard == 0) 1025 break; 1026 else 1027 matchwild = wildcard; 1028 } 1029 } 1030 } 1031 if (pcbinfo->porttoken) 1032 lwkt_reltoken(pcbinfo->porttoken); 1033 1034 return (match); 1035 } 1036 1037 void 1038 in6_pcbpurgeif0(struct in6pcb *head, struct ifnet *ifp) 1039 { 1040 struct in6pcb *in6p; 1041 struct ip6_moptions *im6o; 1042 struct in6_multi_mship *imm, *nimm; 1043 1044 for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) { 1045 if (in6p->in6p_flags & INP_PLACEMARKER) 1046 continue; 1047 im6o = in6p->in6p_moptions; 1048 if ((in6p->inp_vflag & INP_IPV6) && 1049 im6o) { 1050 /* 1051 * Unselect the outgoing interface if it is being 1052 * detached. 1053 */ 1054 if (im6o->im6o_multicast_ifp == ifp) 1055 im6o->im6o_multicast_ifp = NULL; 1056 1057 /* 1058 * Drop multicast group membership if we joined 1059 * through the interface being detached. 1060 * XXX controversial - is it really legal for kernel 1061 * to force this? 1062 */ 1063 for (imm = im6o->im6o_memberships.lh_first; 1064 imm != NULL; imm = nimm) { 1065 nimm = imm->i6mm_chain.le_next; 1066 if (imm->i6mm_maddr->in6m_ifp == ifp) { 1067 LIST_REMOVE(imm, i6mm_chain); 1068 in6_delmulti(imm->i6mm_maddr); 1069 kfree(imm, M_IPMADDR); 1070 } 1071 } 1072 } 1073 } 1074 } 1075 1076 /* 1077 * Check for alternatives when higher level complains 1078 * about service problems. For now, invalidate cached 1079 * routing information. If the route was created dynamically 1080 * (by a redirect), time to try a default gateway again. 1081 */ 1082 void 1083 in6_losing(struct inpcb *in6p) 1084 { 1085 struct rtentry *rt; 1086 struct rt_addrinfo info; 1087 1088 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 1089 bzero((caddr_t)&info, sizeof(info)); 1090 info.rti_flags = rt->rt_flags; 1091 info.rti_info[RTAX_DST] = rt_key(rt); 1092 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1093 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1094 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 1095 if (rt->rt_flags & RTF_DYNAMIC) { 1096 rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1097 rt_mask(rt), rt->rt_flags, NULL); 1098 } 1099 in6p->in6p_route.ro_rt = NULL; 1100 rtfree(rt); 1101 /* 1102 * A new route can be allocated 1103 * the next time output is attempted. 1104 */ 1105 } 1106 } 1107 1108 /* 1109 * After a routing change, flush old routing 1110 * and allocate a (hopefully) better one. 1111 */ 1112 void 1113 in6_rtchange(struct inpcb *inp, int error) 1114 { 1115 if (inp->in6p_route.ro_rt) { 1116 rtfree(inp->in6p_route.ro_rt); 1117 inp->in6p_route.ro_rt = 0; 1118 /* 1119 * A new route can be allocated the next time 1120 * output is attempted. 1121 */ 1122 } 1123 } 1124 1125 /* 1126 * Lookup PCB in hash list. 1127 */ 1128 struct inpcb * 1129 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1130 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1131 int wildcard, struct ifnet *ifp) 1132 { 1133 struct inpcbhead *head; 1134 struct inpcb *inp; 1135 struct inpcb *jinp = NULL; 1136 u_short fport = fport_arg, lport = lport_arg; 1137 int faith; 1138 1139 if (faithprefix_p != NULL) 1140 faith = (*faithprefix_p)(laddr); 1141 else 1142 faith = 0; 1143 1144 /* 1145 * First look for an exact match. 1146 */ 1147 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */, 1148 fport, 1149 laddr->s6_addr32[3], /* XXX JH */ 1150 lport, 1151 pcbinfo->hashmask)]; 1152 LIST_FOREACH(inp, head, inp_hash) { 1153 if ((inp->inp_vflag & INP_IPV6) == 0) 1154 continue; 1155 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1156 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1157 inp->inp_fport == fport && 1158 inp->inp_lport == lport) { 1159 /* 1160 * Found. 1161 */ 1162 if (inp->inp_socket == NULL || 1163 inp->inp_socket->so_cred->cr_prison == NULL) { 1164 return (inp); 1165 } else { 1166 if (jinp == NULL) 1167 jinp = inp; 1168 } 1169 } 1170 } 1171 if (jinp != NULL) 1172 return(jinp); 1173 if (wildcard) { 1174 struct inpcontainerhead *chead; 1175 struct inpcontainer *ic; 1176 struct inpcb *local_wild = NULL; 1177 struct inpcb *jinp_wild = NULL; 1178 struct sockaddr_in6 jsin6; 1179 struct ucred *cred; 1180 1181 /* 1182 * Order of socket selection: 1183 * 1. non-jailed, non-wild. 1184 * 2. non-jailed, wild. 1185 * 3. jailed, non-wild. 1186 * 4. jailed, wild. 1187 */ 1188 jsin6.sin6_family = AF_INET6; 1189 chead = &pcbinfo->wildcardhashbase[INP_PCBWILDCARDHASH(lport, 1190 pcbinfo->wildcardhashmask)]; 1191 LIST_FOREACH(ic, chead, ic_list) { 1192 inp = ic->ic_inp; 1193 1194 if (!(inp->inp_vflag & INP_IPV6)) 1195 continue; 1196 if (inp->inp_socket != NULL) 1197 cred = inp->inp_socket->so_cred; 1198 else 1199 cred = NULL; 1200 1201 if (cred != NULL && jailed(cred)) { 1202 if (jinp != NULL) { 1203 continue; 1204 } else { 1205 jsin6.sin6_addr = *laddr; 1206 if (!jailed_ip(cred->cr_prison, 1207 (struct sockaddr *)&jsin6)) 1208 continue; 1209 } 1210 } 1211 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 1212 inp->inp_lport == lport) { 1213 if (faith && (inp->inp_flags & INP_FAITH) == 0) 1214 continue; 1215 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 1216 laddr)) { 1217 if (cred != NULL && jailed(cred)) 1218 jinp = inp; 1219 else 1220 return (inp); 1221 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1222 if (cred != NULL && jailed(cred)) 1223 jinp_wild = inp; 1224 else 1225 local_wild = inp; 1226 } 1227 } 1228 } 1229 if (local_wild != NULL) 1230 return (local_wild); 1231 if (jinp != NULL) 1232 return (jinp); 1233 return (jinp_wild); 1234 } 1235 1236 /* 1237 * Not found. 1238 */ 1239 return (NULL); 1240 } 1241 1242 void 1243 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 1244 { 1245 struct ip6_hdr *ip; 1246 1247 ip = mtod(m, struct ip6_hdr *); 1248 bzero(sin6, sizeof(*sin6)); 1249 sin6->sin6_len = sizeof(*sin6); 1250 sin6->sin6_family = AF_INET6; 1251 sin6->sin6_addr = ip->ip6_src; 1252 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1253 sin6->sin6_addr.s6_addr16[1] = 0; 1254 sin6->sin6_scope_id = 1255 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1256 ? m->m_pkthdr.rcvif->if_index : 0; 1257 1258 return; 1259 } 1260 1261 static void 1262 in6_savefaddr(struct socket *so, const struct sockaddr *faddr) 1263 { 1264 struct sockaddr_in6 *sin6; 1265 1266 KASSERT(faddr->sa_family == AF_INET6, 1267 ("not AF_INET6 faddr %d", faddr->sa_family)); 1268 1269 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO); 1270 sin6->sin6_family = AF_INET6; 1271 sin6->sin6_len = sizeof(*sin6); 1272 1273 sin6->sin6_port = ((const struct sockaddr_in6 *)faddr)->sin6_port; 1274 sin6->sin6_addr = ((const struct sockaddr_in6 *)faddr)->sin6_addr; 1275 1276 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1277 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 1278 else 1279 sin6->sin6_scope_id = 0; /*XXX*/ 1280 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1281 sin6->sin6_addr.s6_addr16[1] = 0; 1282 1283 so->so_faddr = (struct sockaddr *)sin6; 1284 } 1285 1286 void 1287 in6_mapped_savefaddr(struct socket *so, const struct sockaddr *faddr) 1288 { 1289 if (faddr->sa_family == AF_INET) { 1290 in_savefaddr(so, faddr); 1291 in6_sin_2_v4mapsin6_in_sock(&so->so_faddr); 1292 } else { 1293 in6_savefaddr(so, faddr); 1294 } 1295 } 1296