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 /* Reject v4-mapped address */ 160 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 161 return (EADDRNOTAVAIL); 162 163 if (!prison_replace_wildcards(td, nam)) 164 return (EINVAL); 165 166 /* KAME hack: embed scopeid */ 167 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0) 168 return (EINVAL); 169 /* this must be cleared for ifa_ifwithaddr() */ 170 sin6->sin6_scope_id = 0; 171 172 lport = sin6->sin6_port; 173 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 174 /* 175 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 176 * allow compepte duplication of binding if 177 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 178 * and a multicast address is bound on both 179 * new and duplicated sockets. 180 */ 181 if (so->so_options & SO_REUSEADDR) 182 reuseport = SO_REUSEADDR|SO_REUSEPORT; 183 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 184 struct ifaddr *ia = NULL; 185 186 sin6->sin6_port = 0; /* yech... */ 187 if (!prison_replace_wildcards(td, (struct sockaddr *)sin6)) { 188 sin6->sin6_addr = kin6addr_any; 189 return (EINVAL); 190 } 191 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == NULL) 192 return (EADDRNOTAVAIL); 193 194 /* 195 * XXX: bind to an anycast address might accidentally 196 * cause sending a packet with anycast source address. 197 * We should allow to bind to a deprecated address, since 198 * the application dare to use it. 199 */ 200 if (ia && 201 ((struct in6_ifaddr *)ia)->ia6_flags & 202 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) 203 return (EADDRNOTAVAIL); 204 } 205 206 inp->in6p_laddr = sin6->sin6_addr; 207 208 if (lport == 0) 209 goto auto_select; 210 lport_ho = ntohs(lport); 211 212 /* GROSS */ 213 if (lport_ho < IPV6PORT_RESERVED && cred && 214 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0)) { 215 inp->in6p_laddr = kin6addr_any; 216 return (EACCES); 217 } 218 219 /* 220 * Locate the proper portinfo based on lport 221 */ 222 pcbinfo = inp->inp_pcbinfo; 223 portinfo = 224 &pcbinfo->portinfo[lport_ho & pcbinfo->portinfo_mask]; 225 KKASSERT((lport_ho & pcbinfo->portinfo_mask) == 226 portinfo->offset); 227 228 /* 229 * This has to be atomic. If the porthash is shared across 230 * multiple protocol threads (aka tcp) then the token must 231 * be held. 232 */ 233 GET_PORT_TOKEN(portinfo); 234 235 if (so->so_cred->cr_uid != 0 && 236 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 237 t = in6_pcblookup_local(portinfo, 238 &sin6->sin6_addr, lport, INPLOOKUP_WILDCARD, cred); 239 if (t && 240 (so->so_cred->cr_uid != 241 t->inp_socket->so_cred->cr_uid)) { 242 inp->in6p_laddr = kin6addr_any; 243 error = EADDRINUSE; 244 goto done; 245 } 246 } 247 if (cred && cred->cr_prison && 248 !prison_replace_wildcards(td, nam)) { 249 inp->in6p_laddr = kin6addr_any; 250 error = EADDRNOTAVAIL; 251 goto done; 252 } 253 t = in6_pcblookup_local(portinfo, &sin6->sin6_addr, lport, 254 wild, cred); 255 if (t && (reuseport & t->inp_socket->so_options) == 0) { 256 inp->in6p_laddr = kin6addr_any; 257 error = EADDRINUSE; 258 goto done; 259 } 260 261 inp->inp_lport = lport; 262 in_pcbinsporthash(portinfo, inp); 263 error = 0; 264 done: 265 REL_PORT_TOKEN(portinfo); 266 return (error); 267 } else { 268 auto_select: 269 jsin6.sin6_addr = inp->in6p_laddr; 270 jsin6.sin6_family = AF_INET6; 271 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin6)) { 272 inp->in6p_laddr = kin6addr_any; 273 inp->inp_lport = 0; 274 return (EINVAL); 275 } 276 277 return in6_pcbsetlport(&inp->in6p_laddr, inp, td); 278 } 279 } 280 281 /* 282 * Transform old in6_pcbconnect() into an inner subroutine for new 283 * in6_pcbconnect(): Do some validity-checking on the remote 284 * address (in mbuf 'nam') and then determine local host address 285 * (i.e., which interface) to use to access that remote host. 286 * 287 * This preserves definition of in6_pcbconnect(), while supporting a 288 * slightly different version for T/TCP. (This is more than 289 * a bit of a kludge, but cleaning up the internal interfaces would 290 * have forced minor changes in every protocol). 291 */ 292 293 int 294 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam, 295 struct in6_addr **plocal_addr6, struct thread *td) 296 { 297 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 298 struct ifnet *ifp = NULL; 299 int error = 0; 300 301 if (nam->sa_len != sizeof (*sin6)) 302 return (EINVAL); 303 if (sin6->sin6_family != AF_INET6) 304 return (EAFNOSUPPORT); 305 if (sin6->sin6_port == 0) 306 return (EADDRNOTAVAIL); 307 308 /* KAME hack: embed scopeid */ 309 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0) 310 return EINVAL; 311 312 if (in6_ifaddr) { 313 /* 314 * If the destination address is UNSPECIFIED addr, 315 * use the loopback addr, e.g ::1. 316 */ 317 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 318 sin6->sin6_addr = kin6addr_loopback; 319 } 320 { 321 /* 322 * XXX: in6_selectsrc might replace the bound local address 323 * with the address specified by setsockopt(IPV6_PKTINFO). 324 * Is it the intended behavior? 325 */ 326 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 327 inp->in6p_moptions, 328 &inp->in6p_route, 329 &inp->in6p_laddr, &error, td); 330 if (*plocal_addr6 == NULL) { 331 if (error == 0) 332 error = EADDRNOTAVAIL; 333 return (error); 334 } 335 /* 336 * Don't do pcblookup call here; return interface in 337 * plocal_addr6 338 * and exit to caller, that will do the lookup. 339 */ 340 } 341 342 if (inp->in6p_route.ro_rt) 343 ifp = inp->in6p_route.ro_rt->rt_ifp; 344 345 return (0); 346 } 347 348 /* 349 * Outer subroutine: 350 * Connect from a socket to a specified address. 351 * Both address and port must be specified in argument sin. 352 * If don't have a local address for this socket yet, 353 * then pick one. 354 */ 355 int 356 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 357 { 358 struct in6_addr *addr6; 359 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 360 int error; 361 362 /* Reject v4-mapped address */ 363 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 364 return EADDRNOTAVAIL; 365 366 /* 367 * Call inner routine, to assign local interface address. 368 * in6_pcbladdr() may automatically fill in sin6_scope_id. 369 */ 370 if ((error = in6_pcbladdr(inp, nam, &addr6, td)) != 0) 371 return (error); 372 373 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 374 sin6->sin6_port, 375 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 376 ? addr6 : &inp->in6p_laddr, 377 inp->inp_lport, 0, NULL) != NULL) { 378 return (EADDRINUSE); 379 } 380 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 381 if (inp->inp_lport == 0) { 382 error = in6_pcbbind(inp, NULL, td); 383 if (error) 384 return (error); 385 } 386 inp->in6p_laddr = *addr6; 387 } 388 inp->in6p_faddr = sin6->sin6_addr; 389 inp->inp_fport = sin6->sin6_port; 390 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 391 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 392 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 393 inp->in6p_flowinfo |= 394 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK); 395 396 in_pcbinsconnhash(inp); 397 return (0); 398 } 399 400 #if 0 401 /* 402 * Return an IPv6 address, which is the most appropriate for given 403 * destination and user specified options. 404 * If necessary, this function lookups the routing table and return 405 * an entry to the caller for later use. 406 */ 407 struct in6_addr * 408 in6_selectsrc(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts, 409 struct ip6_moptions *mopts, struct route_in6 *ro, 410 struct in6_addr *laddr, int *errorp, struct thread *td) 411 { 412 struct sockaddr_in6 jsin6; 413 struct ucred *cred = NULL; 414 struct in6_addr *dst; 415 struct in6_ifaddr *ia6 = 0; 416 struct in6_pktinfo *pi = NULL; 417 int jailed = 0; 418 419 if (td && td->td_proc && td->td_proc->p_ucred) 420 cred = td->td_proc->p_ucred; 421 if (cred && cred->cr_prison) 422 jailed = 1; 423 jsin6.sin6_family = AF_INET6; 424 dst = &dstsock->sin6_addr; 425 *errorp = 0; 426 427 /* 428 * If the source address is explicitly specified by the caller, 429 * use it. 430 */ 431 if (opts && (pi = opts->ip6po_pktinfo) && 432 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) { 433 jsin6.sin6_addr = pi->ipi6_addr; 434 if (jailed && !jailed_ip(cred->cr_prison, 435 (struct sockaddr *)&jsin6)) { 436 return(0); 437 } else { 438 return (&pi->ipi6_addr); 439 } 440 } 441 442 /* 443 * If the source address is not specified but the socket(if any) 444 * is already bound, use the bound address. 445 */ 446 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) { 447 jsin6.sin6_addr = *laddr; 448 if (jailed && !jailed_ip(cred->cr_prison, 449 (struct sockaddr *)&jsin6)) { 450 return(0); 451 } else { 452 return (laddr); 453 } 454 } 455 456 /* 457 * If the caller doesn't specify the source address but 458 * the outgoing interface, use an address associated with 459 * the interface. 460 */ 461 if (pi && pi->ipi6_ifindex) { 462 /* XXX boundary check is assumed to be already done. */ 463 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], 464 dst, cred); 465 466 if (ia6 && jailed) { 467 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 468 if (!jailed_ip(cred->cr_prison, 469 (struct sockaddr *)&jsin6)) 470 ia6 = 0; 471 } 472 473 if (ia6 == 0) { 474 *errorp = EADDRNOTAVAIL; 475 return (0); 476 } 477 return (&satosin6(&ia6->ia_addr)->sin6_addr); 478 } 479 480 /* 481 * If the destination address is a link-local unicast address or 482 * a multicast address, and if the outgoing interface is specified 483 * by the sin6_scope_id filed, use an address associated with the 484 * interface. 485 * XXX: We're now trying to define more specific semantics of 486 * sin6_scope_id field, so this part will be rewritten in 487 * the near future. 488 */ 489 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) && 490 dstsock->sin6_scope_id) { 491 /* 492 * I'm not sure if boundary check for scope_id is done 493 * somewhere... 494 */ 495 if (dstsock->sin6_scope_id < 0 || 496 if_index < dstsock->sin6_scope_id) { 497 *errorp = ENXIO; /* XXX: better error? */ 498 return (0); 499 } 500 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id], 501 dst, cred); 502 503 if (ia6 && jailed) { 504 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 505 if (!jailed_ip(cred->cr_prison, 506 (struct sockaddr *)&jsin6)) 507 ia6 = 0; 508 } 509 510 if (ia6 == 0) { 511 *errorp = EADDRNOTAVAIL; 512 return (0); 513 } 514 return (&satosin6(&ia6->ia_addr)->sin6_addr); 515 } 516 517 /* 518 * If the destination address is a multicast address and 519 * the outgoing interface for the address is specified 520 * by the caller, use an address associated with the interface. 521 * There is a sanity check here; if the destination has node-local 522 * scope, the outgoing interfacde should be a loopback address. 523 * Even if the outgoing interface is not specified, we also 524 * choose a loopback interface as the outgoing interface. 525 */ 526 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) { 527 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 528 529 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 530 ifp = &loif[0]; 531 } 532 533 if (ifp) { 534 ia6 = in6_ifawithscope(ifp, dst, cred); 535 if (ia6 == 0) { 536 *errorp = EADDRNOTAVAIL; 537 return (0); 538 } 539 return (&ia6->ia_addr.sin6_addr); 540 } 541 } 542 543 /* 544 * If the next hop address for the packet is specified 545 * by caller, use an address associated with the route 546 * to the next hop. 547 */ 548 { 549 struct sockaddr_in6 *sin6_next; 550 struct rtentry *rt; 551 552 if (opts && opts->ip6po_nexthop) { 553 sin6_next = satosin6(opts->ip6po_nexthop); 554 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 555 if (rt) { 556 ia6 = in6_ifawithscope(rt->rt_ifp, dst, cred); 557 if (ia6 == 0) 558 ia6 = ifatoia6(rt->rt_ifa); 559 } 560 if (ia6 && jailed) { 561 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 562 if (!jailed_ip(cred->cr_prison, 563 (struct sockaddr *)&jsin6)) 564 ia6 = 0; 565 } 566 567 if (ia6 == 0) { 568 *errorp = EADDRNOTAVAIL; 569 return (0); 570 } 571 return (&satosin6(&ia6->ia_addr)->sin6_addr); 572 } 573 } 574 575 /* 576 * If route is known or can be allocated now, 577 * our src addr is taken from the i/f, else punt. 578 */ 579 if (ro) { 580 if (ro->ro_rt && 581 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 582 RTFREE(ro->ro_rt); 583 ro->ro_rt = NULL; 584 } 585 if (ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL) { 586 struct sockaddr_in6 *dst6; 587 588 /* No route yet, so try to acquire one */ 589 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 590 dst6 = &ro->ro_dst; 591 dst6->sin6_family = AF_INET6; 592 dst6->sin6_len = sizeof(struct sockaddr_in6); 593 dst6->sin6_addr = *dst; 594 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) { 595 ro->ro_rt = 596 rtpurelookup((struct sockaddr *)&ro->ro_dst); 597 } else { 598 rtalloc((struct route *)ro); 599 } 600 } 601 602 /* 603 * in_pcbconnect() checks out IFF_LOOPBACK to skip using 604 * the address. But we don't know why it does so. 605 * It is necessary to ensure the scope even for lo0 606 * so doesn't check out IFF_LOOPBACK. 607 */ 608 609 if (ro->ro_rt) { 610 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst, cred); 611 if (ia6 && jailed) { 612 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 613 if (!jailed_ip(cred->cr_prison, 614 (struct sockaddr *)&jsin6)) 615 ia6 = 0; 616 } 617 618 if (ia6 == 0) /* xxx scope error ?*/ 619 ia6 = ifatoia6(ro->ro_rt->rt_ifa); 620 621 if (ia6 && jailed) { 622 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 623 if (!jailed_ip(cred->cr_prison, 624 (struct sockaddr *)&jsin6)) 625 ia6 = 0; 626 } 627 } 628 if (ia6 == 0) { 629 *errorp = EHOSTUNREACH; /* no route */ 630 return (0); 631 } 632 return (&satosin6(&ia6->ia_addr)->sin6_addr); 633 } 634 635 *errorp = EADDRNOTAVAIL; 636 return (0); 637 } 638 639 /* 640 * Default hop limit selection. The precedence is as follows: 641 * 1. Hoplimit valued specified via ioctl. 642 * 2. (If the outgoing interface is detected) the current 643 * hop limit of the interface specified by router advertisement. 644 * 3. The system default hoplimit. 645 */ 646 int 647 in6_selecthlim(struct in6pcb *in6p, struct ifnet *ifp) 648 { 649 int hlim; 650 651 if (in6p && in6p->in6p_hops >= 0) { 652 return (in6p->in6p_hops); 653 } else if (ifp) { 654 hlim = ND_IFINFO(ifp)->chlim; 655 if (hlim < ip6_minhlim) 656 hlim = ip6_minhlim; 657 } else { 658 hlim = ip6_defhlim; 659 } 660 return (hlim); 661 662 } 663 #endif 664 665 void 666 in6_pcbdisconnect(struct inpcb *inp) 667 { 668 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 669 inp->inp_fport = 0; 670 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 671 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 672 in_pcbremconnhash(inp); 673 if (inp->inp_socket->so_state & SS_NOFDREF) 674 in6_pcbdetach(inp); 675 } 676 677 void 678 in6_pcbdetach(struct inpcb *inp) 679 { 680 struct socket *so = inp->inp_socket; 681 struct inpcbinfo *ipi = inp->inp_pcbinfo; 682 683 #ifdef IPSEC 684 if (inp->in6p_sp != NULL) 685 ipsec6_delete_pcbpolicy(inp); 686 #endif /* IPSEC */ 687 inp->inp_gencnt = ++ipi->ipi_gencnt; 688 in_pcbremlists(inp); 689 so->so_pcb = NULL; 690 KKASSERT((so->so_state & SS_ASSERTINPROG) == 0); 691 sofree(so); /* remove pcb ref */ 692 693 if (inp->in6p_options) 694 m_freem(inp->in6p_options); 695 ip6_freepcbopts(inp->in6p_outputopts); 696 ip6_freemoptions(inp->in6p_moptions); 697 if (inp->in6p_route.ro_rt) 698 rtfree(inp->in6p_route.ro_rt); 699 /* Check and free IPv4 related resources in case of mapped addr */ 700 if (inp->inp_options) 701 m_free(inp->inp_options); 702 ip_freemoptions(inp->inp_moptions); 703 704 kfree(inp, M_PCB); 705 } 706 707 /* 708 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was 709 * modified to match the pru_sockaddr() and pru_peeraddr() entry points 710 * in struct pr_usrreqs, so that protocols can just reference then directly 711 * without the need for a wrapper function. The socket must have a valid 712 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 713 * except through a kernel programming error, so it is acceptable to panic 714 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 715 * because there actually /is/ a programming error somewhere... XXX) 716 */ 717 void 718 in6_setsockaddr_dispatch(netmsg_t msg) 719 { 720 int error; 721 722 error = in6_setsockaddr(msg->sockaddr.base.nm_so, msg->sockaddr.nm_nam); 723 lwkt_replymsg(&msg->sockaddr.base.lmsg, error); 724 } 725 726 int 727 in6_setsockaddr(struct socket *so, struct sockaddr **nam) 728 { 729 struct inpcb *inp; 730 struct sockaddr_in6 *sin6; 731 732 /* 733 * Do the malloc first in case it blocks. 734 */ 735 sin6 = kmalloc(sizeof *sin6, M_SONAME, M_WAITOK | M_ZERO); 736 sin6->sin6_family = AF_INET6; 737 sin6->sin6_len = sizeof(*sin6); 738 739 crit_enter(); 740 inp = so->so_pcb; 741 if (!inp) { 742 crit_exit(); 743 kfree(sin6, M_SONAME); 744 return EINVAL; 745 } 746 sin6->sin6_port = inp->inp_lport; 747 sin6->sin6_addr = inp->in6p_laddr; 748 crit_exit(); 749 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 750 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 751 else 752 sin6->sin6_scope_id = 0; /*XXX*/ 753 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 754 sin6->sin6_addr.s6_addr16[1] = 0; 755 756 *nam = (struct sockaddr *)sin6; 757 return 0; 758 } 759 760 void 761 in6_setpeeraddr_dispatch(netmsg_t msg) 762 { 763 int error; 764 765 error = in6_setpeeraddr(msg->peeraddr.base.nm_so, msg->peeraddr.nm_nam); 766 lwkt_replymsg(&msg->peeraddr.base.lmsg, error); 767 } 768 769 int 770 in6_setpeeraddr(struct socket *so, struct sockaddr **nam) 771 { 772 struct inpcb *inp; 773 struct sockaddr_in6 *sin6; 774 775 /* 776 * Do the malloc first in case it blocks. 777 */ 778 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO); 779 sin6->sin6_family = AF_INET6; 780 sin6->sin6_len = sizeof(struct sockaddr_in6); 781 782 crit_enter(); 783 inp = so->so_pcb; 784 if (!inp) { 785 crit_exit(); 786 kfree(sin6, M_SONAME); 787 return EINVAL; 788 } 789 sin6->sin6_port = inp->inp_fport; 790 sin6->sin6_addr = inp->in6p_faddr; 791 crit_exit(); 792 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 793 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 794 else 795 sin6->sin6_scope_id = 0; /*XXX*/ 796 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 797 sin6->sin6_addr.s6_addr16[1] = 0; 798 799 *nam = (struct sockaddr *)sin6; 800 return 0; 801 } 802 803 /* 804 * Pass some notification to all connections of a protocol 805 * associated with address dst. The local address and/or port numbers 806 * may be specified to limit the search. The "usual action" will be 807 * taken, depending on the ctlinput cmd. The caller must filter any 808 * cmds that are uninteresting (e.g., no error in the map). 809 * Call the protocol specific routine (if any) to report 810 * any errors for each matching socket. 811 */ 812 void 813 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, in_port_t fport, 814 const struct sockaddr *src, in_port_t lport, int cmd, int arg, 815 inp_notify_t notify) 816 { 817 struct inpcb *inp, *marker; 818 struct sockaddr_in6 sa6_src, *sa6_dst; 819 u_int32_t flowinfo; 820 821 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 822 return; 823 824 sa6_dst = (struct sockaddr_in6 *)dst; 825 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 826 return; 827 828 /* 829 * note that src can be NULL when we get notify by local fragmentation. 830 */ 831 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 832 flowinfo = sa6_src.sin6_flowinfo; 833 834 /* 835 * Redirects go to all references to the destination, 836 * and use in6_rtchange to invalidate the route cache. 837 * Dead host indications: also use in6_rtchange to invalidate 838 * the cache, and deliver the error to all the sockets. 839 * Otherwise, if we have knowledge of the local port and address, 840 * deliver only to that socket. 841 */ 842 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 843 fport = 0; 844 lport = 0; 845 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 846 847 if (cmd != PRC_HOSTDEAD) 848 notify = in6_rtchange; 849 } 850 if (cmd != PRC_MSGSIZE) 851 arg = inet6ctlerrmap[cmd]; 852 853 marker = in_pcbmarker(mycpuid); 854 855 GET_PCBINFO_TOKEN(pcbinfo); 856 857 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 858 while ((inp = LIST_NEXT(marker, inp_list)) != NULL) { 859 LIST_REMOVE(marker, inp_list); 860 LIST_INSERT_AFTER(inp, marker, inp_list); 861 862 if (inp->inp_flags & INP_PLACEMARKER) 863 continue; 864 865 if (!INP_ISIPV6(inp)) 866 continue; 867 /* 868 * If the error designates a new path MTU for a destination 869 * and the application (associated with this socket) wanted to 870 * know the value, notify. Note that we notify for all 871 * disconnected sockets if the corresponding application 872 * wanted. This is because some UDP applications keep sending 873 * sockets disconnected. 874 * XXX: should we avoid to notify the value to TCP sockets? 875 */ 876 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 877 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 878 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 879 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, &arg); 880 } 881 882 /* 883 * Detect if we should notify the error. If no source and 884 * destination ports are specifed, but non-zero flowinfo and 885 * local address match, notify the error. This is the case 886 * when the error is delivered with an encrypted buffer 887 * by ESP. Otherwise, just compare addresses and ports 888 * as usual. 889 */ 890 if (lport == 0 && fport == 0 && flowinfo && 891 inp->inp_socket != NULL && 892 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 893 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 894 goto do_notify; 895 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 896 &sa6_dst->sin6_addr) || 897 inp->inp_socket == 0 || 898 (lport && inp->inp_lport != lport) || 899 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 900 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 901 &sa6_src.sin6_addr)) || 902 (fport && inp->inp_fport != fport)) 903 continue; 904 905 do_notify: 906 if (notify) 907 (*notify)(inp, arg); 908 } 909 LIST_REMOVE(marker, inp_list); 910 911 REL_PCBINFO_TOKEN(pcbinfo); 912 } 913 914 /* 915 * Lookup a PCB based on the local address and port. 916 */ 917 struct inpcb * 918 in6_pcblookup_local(struct inpcbportinfo *portinfo, 919 const struct in6_addr *laddr, u_int lport_arg, int wild_okay, 920 struct ucred *cred) 921 { 922 struct inpcb *inp; 923 int matchwild = 3, wildcard; 924 u_short lport = lport_arg; 925 struct inpcbporthead *porthash; 926 struct inpcbport *phd; 927 struct inpcb *match = NULL; 928 929 /* 930 * If the porthashbase is shared across several cpus, it must 931 * have been locked. 932 */ 933 ASSERT_PORT_TOKEN_HELD(portinfo); 934 935 /* 936 * Best fit PCB lookup. 937 * 938 * First see if this local port is in use by looking on the 939 * port hash list. 940 */ 941 porthash = &portinfo->porthashbase[ 942 INP_PCBPORTHASH(lport, portinfo->porthashmask)]; 943 LIST_FOREACH(phd, porthash, phd_hash) { 944 if (phd->phd_port == lport) 945 break; 946 } 947 948 if (phd != NULL) { 949 /* 950 * Port is in use by one or more PCBs. Look for best 951 * fit. 952 */ 953 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 954 wildcard = 0; 955 if (!INP_ISIPV6(inp)) 956 continue; 957 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 958 wildcard++; 959 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 960 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 961 wildcard++; 962 else if (!IN6_ARE_ADDR_EQUAL( 963 &inp->in6p_laddr, laddr)) 964 continue; 965 } else { 966 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 967 wildcard++; 968 } 969 if (wildcard && !wild_okay) 970 continue; 971 if (wildcard < matchwild && 972 (cred == NULL || 973 cred->cr_prison == 974 inp->inp_socket->so_cred->cr_prison)) { 975 match = inp; 976 matchwild = wildcard; 977 if (wildcard == 0) 978 break; 979 else 980 matchwild = wildcard; 981 } 982 } 983 } 984 return (match); 985 } 986 987 void 988 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 989 { 990 struct in6pcb *in6p, *marker; 991 struct ip6_moptions *im6o; 992 struct in6_multi_mship *imm, *nimm; 993 994 /* 995 * We only need to make sure that we are in netisr0, where all 996 * multicast operation happen. We could check inpcbinfo which 997 * does not belong to netisr0 by holding the inpcbinfo's token. 998 * In this case, the pcbinfo must be able to be shared, i.e. 999 * pcbinfo->infotoken is not NULL. 1000 */ 1001 KASSERT(&curthread->td_msgport == netisr_cpuport(0), 1002 ("not in netisr0")); 1003 KASSERT(pcbinfo->cpu == 0 || pcbinfo->infotoken != NULL, 1004 ("pcbinfo could not be shared")); 1005 1006 /* 1007 * Get a marker for the current netisr (netisr0). 1008 * 1009 * It is possible that the multicast address deletion blocks, 1010 * which could cause temporary token releasing. So we use 1011 * inpcb marker here to get a coherent view of the inpcb list. 1012 * 1013 * While, on the other hand, moptions are only added and deleted 1014 * in netisr0, so we would not see staled moption or miss moption 1015 * even if the token was released due to the blocking multicast 1016 * address deletion. 1017 */ 1018 marker = in_pcbmarker(mycpuid); 1019 1020 GET_PCBINFO_TOKEN(pcbinfo); 1021 1022 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 1023 while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) { 1024 LIST_REMOVE(marker, inp_list); 1025 LIST_INSERT_AFTER(in6p, marker, inp_list); 1026 1027 if (in6p->in6p_flags & INP_PLACEMARKER) 1028 continue; 1029 im6o = in6p->in6p_moptions; 1030 if (INP_ISIPV6(in6p) && im6o) { 1031 /* 1032 * Unselect the outgoing interface if it is being 1033 * detached. 1034 */ 1035 if (im6o->im6o_multicast_ifp == ifp) 1036 im6o->im6o_multicast_ifp = NULL; 1037 1038 /* 1039 * Drop multicast group membership if we joined 1040 * through the interface being detached. 1041 * XXX controversial - is it really legal for kernel 1042 * to force this? 1043 */ 1044 for (imm = im6o->im6o_memberships.lh_first; 1045 imm != NULL; imm = nimm) { 1046 nimm = imm->i6mm_chain.le_next; 1047 if (imm->i6mm_maddr->in6m_ifp == ifp) { 1048 LIST_REMOVE(imm, i6mm_chain); 1049 in6_delmulti(imm->i6mm_maddr); 1050 kfree(imm, M_IPMADDR); 1051 } 1052 } 1053 } 1054 } 1055 LIST_REMOVE(marker, inp_list); 1056 1057 REL_PCBINFO_TOKEN(pcbinfo); 1058 } 1059 1060 /* 1061 * Check for alternatives when higher level complains 1062 * about service problems. For now, invalidate cached 1063 * routing information. If the route was created dynamically 1064 * (by a redirect), time to try a default gateway again. 1065 */ 1066 void 1067 in6_losing(struct inpcb *in6p) 1068 { 1069 struct rtentry *rt; 1070 struct rt_addrinfo info; 1071 1072 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 1073 bzero((caddr_t)&info, sizeof(info)); 1074 info.rti_flags = rt->rt_flags; 1075 info.rti_info[RTAX_DST] = rt_key(rt); 1076 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1077 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1078 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 1079 if (rt->rt_flags & RTF_DYNAMIC) { 1080 rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1081 rt_mask(rt), rt->rt_flags, NULL); 1082 } 1083 in6p->in6p_route.ro_rt = NULL; 1084 rtfree(rt); 1085 /* 1086 * A new route can be allocated 1087 * the next time output is attempted. 1088 */ 1089 } 1090 } 1091 1092 /* 1093 * After a routing change, flush old routing 1094 * and allocate a (hopefully) better one. 1095 */ 1096 void 1097 in6_rtchange(struct inpcb *inp, int error) 1098 { 1099 if (inp->in6p_route.ro_rt) { 1100 rtfree(inp->in6p_route.ro_rt); 1101 inp->in6p_route.ro_rt = 0; 1102 /* 1103 * A new route can be allocated the next time 1104 * output is attempted. 1105 */ 1106 } 1107 } 1108 1109 /* 1110 * Lookup PCB in hash list. 1111 */ 1112 struct inpcb * 1113 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1114 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1115 int wildcard, struct ifnet *ifp) 1116 { 1117 struct inpcbhead *head; 1118 struct inpcb *inp; 1119 struct inpcb *jinp = NULL; 1120 u_short fport = fport_arg, lport = lport_arg; 1121 int faith; 1122 1123 if (faithprefix_p != NULL) 1124 faith = (*faithprefix_p)(laddr); 1125 else 1126 faith = 0; 1127 1128 /* 1129 * First look for an exact match. 1130 */ 1131 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */, 1132 fport, 1133 laddr->s6_addr32[3], /* XXX JH */ 1134 lport, 1135 pcbinfo->hashmask)]; 1136 LIST_FOREACH(inp, head, inp_hash) { 1137 if (!INP_ISIPV6(inp)) 1138 continue; 1139 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1140 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1141 inp->inp_fport == fport && 1142 inp->inp_lport == lport) { 1143 /* 1144 * Found. 1145 */ 1146 if (inp->inp_socket == NULL || 1147 inp->inp_socket->so_cred->cr_prison == NULL) { 1148 return (inp); 1149 } else { 1150 if (jinp == NULL) 1151 jinp = inp; 1152 } 1153 } 1154 } 1155 if (jinp != NULL) 1156 return(jinp); 1157 1158 if (wildcard) { 1159 struct inpcontainerhead *chead; 1160 struct inpcontainer *ic; 1161 struct inpcb *local_wild = NULL; 1162 struct inpcb *jinp_wild = NULL; 1163 struct sockaddr_in6 jsin6; 1164 struct ucred *cred; 1165 1166 /* 1167 * Order of socket selection: 1168 * 1. non-jailed, non-wild. 1169 * 2. non-jailed, wild. 1170 * 3. jailed, non-wild. 1171 * 4. jailed, wild. 1172 */ 1173 jsin6.sin6_family = AF_INET6; 1174 chead = &pcbinfo->wildcardhashbase[INP_PCBWILDCARDHASH(lport, 1175 pcbinfo->wildcardhashmask)]; 1176 1177 GET_PCBINFO_TOKEN(pcbinfo); 1178 LIST_FOREACH(ic, chead, ic_list) { 1179 inp = ic->ic_inp; 1180 if (inp->inp_flags & INP_PLACEMARKER) 1181 continue; 1182 1183 if (!INP_ISIPV6(inp)) 1184 continue; 1185 if (inp->inp_socket != NULL) 1186 cred = inp->inp_socket->so_cred; 1187 else 1188 cred = NULL; 1189 1190 if (cred != NULL && jailed(cred)) { 1191 if (jinp != NULL) { 1192 continue; 1193 } else { 1194 jsin6.sin6_addr = *laddr; 1195 if (!jailed_ip(cred->cr_prison, 1196 (struct sockaddr *)&jsin6)) 1197 continue; 1198 } 1199 } 1200 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 1201 inp->inp_lport == lport) { 1202 if (faith && (inp->inp_flags & INP_FAITH) == 0) 1203 continue; 1204 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 1205 laddr)) { 1206 if (cred != NULL && jailed(cred)) { 1207 jinp = inp; 1208 } else { 1209 REL_PCBINFO_TOKEN(pcbinfo); 1210 return (inp); 1211 } 1212 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1213 if (cred != NULL && jailed(cred)) 1214 jinp_wild = inp; 1215 else 1216 local_wild = inp; 1217 } 1218 } 1219 } 1220 REL_PCBINFO_TOKEN(pcbinfo); 1221 1222 if (local_wild != NULL) 1223 return (local_wild); 1224 if (jinp != NULL) 1225 return (jinp); 1226 return (jinp_wild); 1227 } 1228 1229 /* 1230 * Not found. 1231 */ 1232 return (NULL); 1233 } 1234 1235 void 1236 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 1237 { 1238 struct ip6_hdr *ip; 1239 1240 ip = mtod(m, struct ip6_hdr *); 1241 bzero(sin6, sizeof(*sin6)); 1242 sin6->sin6_len = sizeof(*sin6); 1243 sin6->sin6_family = AF_INET6; 1244 sin6->sin6_addr = ip->ip6_src; 1245 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1246 sin6->sin6_addr.s6_addr16[1] = 0; 1247 sin6->sin6_scope_id = 1248 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1249 ? m->m_pkthdr.rcvif->if_index : 0; 1250 1251 return; 1252 } 1253 1254 void 1255 in6_savefaddr(struct socket *so, const struct sockaddr *faddr) 1256 { 1257 struct sockaddr_in6 *sin6; 1258 1259 KASSERT(faddr->sa_family == AF_INET6, 1260 ("not AF_INET6 faddr %d", faddr->sa_family)); 1261 1262 sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO); 1263 sin6->sin6_family = AF_INET6; 1264 sin6->sin6_len = sizeof(*sin6); 1265 1266 sin6->sin6_port = ((const struct sockaddr_in6 *)faddr)->sin6_port; 1267 sin6->sin6_addr = ((const struct sockaddr_in6 *)faddr)->sin6_addr; 1268 1269 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1270 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 1271 else 1272 sin6->sin6_scope_id = 0; /*XXX*/ 1273 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1274 sin6->sin6_addr.s6_addr16[1] = 0; 1275 1276 so->so_faddr = (struct sockaddr *)sin6; 1277 } 1278