1 /* $FreeBSD: src/sys/netinet6/in6_pcb.c,v 1.10.2.9 2003/01/24 05:11:35 sam Exp $ */ 2 /* $DragonFly: src/sys/netinet6/in6_pcb.c,v 1.35 2008/09/04 09:08:22 hasso Exp $ */ 3 /* $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 */ 34 35 /* 36 * Copyright (c) 1982, 1986, 1991, 1993 37 * The Regents of the University of California. All rights reserved. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. All advertising materials mentioning features or use of this software 48 * must display the following acknowledgement: 49 * This product includes software developed by the University of 50 * California, Berkeley and its contributors. 51 * 4. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * 67 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 68 */ 69 70 #include "opt_inet.h" 71 #include "opt_inet6.h" 72 #include "opt_ipsec.h" 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/malloc.h> 77 #include <sys/mbuf.h> 78 #include <sys/domain.h> 79 #include <sys/protosw.h> 80 #include <sys/socket.h> 81 #include <sys/socketvar.h> 82 #include <sys/sockio.h> 83 #include <sys/errno.h> 84 #include <sys/time.h> 85 #include <sys/proc.h> 86 #include <sys/priv.h> 87 #include <sys/jail.h> 88 89 #include <sys/thread2.h> 90 #include <sys/msgport2.h> 91 92 #include <vm/vm_zone.h> 93 94 #include <net/if.h> 95 #include <net/if_types.h> 96 #include <net/route.h> 97 98 #include <netinet/in.h> 99 #include <netinet/in_var.h> 100 #include <netinet/in_systm.h> 101 #include <netinet/ip6.h> 102 #include <netinet/ip_var.h> 103 #include <netinet6/ip6_var.h> 104 #include <netinet6/nd6.h> 105 #include <netinet/in_pcb.h> 106 #include <netinet6/in6_pcb.h> 107 108 #ifdef IPSEC 109 #include <netinet6/ipsec.h> 110 #ifdef INET6 111 #include <netinet6/ipsec6.h> 112 #endif 113 #include <netinet6/ah.h> 114 #ifdef INET6 115 #include <netinet6/ah6.h> 116 #endif 117 #include <netproto/key/key.h> 118 #endif /* IPSEC */ 119 120 #ifdef FAST_IPSEC 121 #include <netproto/ipsec/ipsec.h> 122 #include <netproto/ipsec/ipsec6.h> 123 #include <netproto/ipsec/key.h> 124 #define IPSEC 125 #endif /* FAST_IPSEC */ 126 127 struct in6_addr zeroin6_addr; 128 129 int 130 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 131 { 132 struct socket *so = inp->inp_socket; 133 struct sockaddr_in6 *sin6 = NULL; 134 struct sockaddr_in6 jsin6; 135 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 136 struct proc *p = td->td_proc; 137 struct ucred *cred = NULL; 138 u_short lport = 0; 139 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 140 141 if (!in6_ifaddr) /* XXX broken! */ 142 return (EADDRNOTAVAIL); 143 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 144 return (EINVAL); 145 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 146 wild = 1; 147 if (p) 148 cred = p->p_ucred; 149 if (nam) { 150 sin6 = (struct sockaddr_in6 *)nam; 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)) == 0) 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 if (lport) { 203 struct inpcb *t; 204 205 /* GROSS */ 206 if (ntohs(lport) < IPV6PORT_RESERVED && cred && 207 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0)) 208 return (EACCES); 209 if (so->so_cred->cr_uid != 0 && 210 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 211 t = in6_pcblookup_local(pcbinfo, 212 &sin6->sin6_addr, lport, 213 INPLOOKUP_WILDCARD, cred); 214 if (t && 215 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 216 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 217 (t->inp_socket->so_options & 218 SO_REUSEPORT) == 0) && 219 (so->so_cred->cr_uid != 220 t->inp_socket->so_cred->cr_uid)) 221 return (EADDRINUSE); 222 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 223 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 224 struct sockaddr_in sin; 225 226 in6_sin6_2_sin(&sin, sin6); 227 t = in_pcblookup_local(pcbinfo, 228 sin.sin_addr, lport, 229 INPLOOKUP_WILDCARD, cred); 230 if (t && 231 (so->so_cred->cr_uid != 232 t->inp_socket->so_cred->cr_uid) && 233 (ntohl(t->inp_laddr.s_addr) != 234 INADDR_ANY || 235 INP_SOCKAF(so) == 236 INP_SOCKAF(t->inp_socket))) 237 return (EADDRINUSE); 238 } 239 } 240 if (cred && cred->cr_prison && 241 !prison_replace_wildcards(td, nam)) 242 return(EADDRNOTAVAIL); 243 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 244 lport, wild, cred); 245 if (t && (reuseport & t->inp_socket->so_options) == 0) 246 return (EADDRINUSE); 247 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 248 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 249 struct sockaddr_in sin; 250 251 in6_sin6_2_sin(&sin, sin6); 252 t = in_pcblookup_local(pcbinfo, 253 sin.sin_addr, lport, 254 wild, cred); 255 if (t && 256 (reuseport & t->inp_socket->so_options) 257 == 0 && 258 (ntohl(t->inp_laddr.s_addr) 259 != INADDR_ANY || 260 INP_SOCKAF(so) == 261 INP_SOCKAF(t->inp_socket))) 262 return (EADDRINUSE); 263 } 264 } 265 inp->in6p_laddr = sin6->sin6_addr; 266 } 267 if (lport == 0) { 268 int e; 269 270 jsin6.sin6_addr = inp->in6p_laddr; 271 jsin6.sin6_family = AF_INET6; 272 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin6)) { 273 inp->in6p_laddr = kin6addr_any; 274 inp->inp_lport = 0; 275 return (EINVAL); 276 } 277 278 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, td)) != 0) 279 return (e); 280 } 281 else { 282 inp->inp_lport = lport; 283 if (in_pcbinsporthash(inp) != 0) { 284 inp->in6p_laddr = kin6addr_any; 285 inp->inp_lport = 0; 286 return (EAGAIN); 287 } 288 } 289 return (0); 290 } 291 292 /* 293 * Transform old in6_pcbconnect() into an inner subroutine for new 294 * in6_pcbconnect(): Do some validity-checking on the remote 295 * address (in mbuf 'nam') and then determine local host address 296 * (i.e., which interface) to use to access that remote host. 297 * 298 * This preserves definition of in6_pcbconnect(), while supporting a 299 * slightly different version for T/TCP. (This is more than 300 * a bit of a kludge, but cleaning up the internal interfaces would 301 * have forced minor changes in every protocol). 302 */ 303 304 int 305 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam, 306 struct in6_addr **plocal_addr6, struct thread *td) 307 { 308 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 309 struct ifnet *ifp = NULL; 310 int error = 0; 311 312 if (nam->sa_len != sizeof (*sin6)) 313 return (EINVAL); 314 if (sin6->sin6_family != AF_INET6) 315 return (EAFNOSUPPORT); 316 if (sin6->sin6_port == 0) 317 return (EADDRNOTAVAIL); 318 319 /* KAME hack: embed scopeid */ 320 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0) 321 return EINVAL; 322 323 if (in6_ifaddr) { 324 /* 325 * If the destination address is UNSPECIFIED addr, 326 * use the loopback addr, e.g ::1. 327 */ 328 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 329 sin6->sin6_addr = kin6addr_loopback; 330 } 331 { 332 /* 333 * XXX: in6_selectsrc might replace the bound local address 334 * with the address specified by setsockopt(IPV6_PKTINFO). 335 * Is it the intended behavior? 336 */ 337 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 338 inp->in6p_moptions, 339 &inp->in6p_route, 340 &inp->in6p_laddr, &error, td); 341 if (*plocal_addr6 == 0) { 342 if (error == 0) 343 error = EADDRNOTAVAIL; 344 return (error); 345 } 346 /* 347 * Don't do pcblookup call here; return interface in 348 * plocal_addr6 349 * and exit to caller, that will do the lookup. 350 */ 351 } 352 353 if (inp->in6p_route.ro_rt) 354 ifp = inp->in6p_route.ro_rt->rt_ifp; 355 356 return (0); 357 } 358 359 /* 360 * Outer subroutine: 361 * Connect from a socket to a specified address. 362 * Both address and port must be specified in argument sin. 363 * If don't have a local address for this socket yet, 364 * then pick one. 365 */ 366 int 367 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 368 { 369 struct in6_addr *addr6; 370 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 371 int error; 372 373 /* 374 * Call inner routine, to assign local interface address. 375 * in6_pcbladdr() may automatically fill in sin6_scope_id. 376 */ 377 if ((error = in6_pcbladdr(inp, nam, &addr6, td)) != 0) 378 return (error); 379 380 if (in6_pcblookup_hash(inp->inp_cpcbinfo, &sin6->sin6_addr, 381 sin6->sin6_port, 382 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 383 ? addr6 : &inp->in6p_laddr, 384 inp->inp_lport, 0, NULL) != NULL) { 385 return (EADDRINUSE); 386 } 387 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 388 if (inp->inp_lport == 0) { 389 error = in6_pcbbind(inp, NULL, td); 390 if (error) 391 return (error); 392 } 393 inp->in6p_laddr = *addr6; 394 } 395 inp->in6p_faddr = sin6->sin6_addr; 396 inp->inp_fport = sin6->sin6_port; 397 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 398 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 399 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 400 inp->in6p_flowinfo |= 401 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK); 402 403 in_pcbinsconnhash(inp); 404 return (0); 405 } 406 407 #if 0 408 /* 409 * Return an IPv6 address, which is the most appropriate for given 410 * destination and user specified options. 411 * If necessary, this function lookups the routing table and return 412 * an entry to the caller for later use. 413 */ 414 struct in6_addr * 415 in6_selectsrc(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts, 416 struct ip6_moptions *mopts, struct route_in6 *ro, 417 struct in6_addr *laddr, int *errorp, struct thread *td) 418 { 419 struct sockaddr_in6 jsin6; 420 struct ucred *cred = NULL; 421 struct in6_addr *dst; 422 struct in6_ifaddr *ia6 = 0; 423 struct in6_pktinfo *pi = NULL; 424 int jailed = 0; 425 426 if (td && td->td_proc && td->td_proc->p_ucred) 427 cred = td->td_proc->p_ucred; 428 if (cred && cred->cr_prison) 429 jailed = 1; 430 jsin6.sin6_family = AF_INET6; 431 dst = &dstsock->sin6_addr; 432 *errorp = 0; 433 434 /* 435 * If the source address is explicitly specified by the caller, 436 * use it. 437 */ 438 if (opts && (pi = opts->ip6po_pktinfo) && 439 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) { 440 jsin6.sin6_addr = pi->ipi6_addr; 441 if (jailed && !jailed_ip(cred->cr_prison, 442 (struct sockaddr *)&jsin6)) { 443 return(0); 444 } else { 445 return (&pi->ipi6_addr); 446 } 447 } 448 449 /* 450 * If the source address is not specified but the socket(if any) 451 * is already bound, use the bound address. 452 */ 453 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) { 454 jsin6.sin6_addr = *laddr; 455 if (jailed && !jailed_ip(cred->cr_prison, 456 (struct sockaddr *)&jsin6)) { 457 return(0); 458 } else { 459 return (laddr); 460 } 461 } 462 463 /* 464 * If the caller doesn't specify the source address but 465 * the outgoing interface, use an address associated with 466 * the interface. 467 */ 468 if (pi && pi->ipi6_ifindex) { 469 /* XXX boundary check is assumed to be already done. */ 470 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], 471 dst); 472 473 if (ia6 && jailed) { 474 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 475 if (!jailed_ip(cred->cr_prison, 476 (struct sockaddr *)&jsin6)) 477 ia6 = 0; 478 } 479 480 if (ia6 == 0) { 481 *errorp = EADDRNOTAVAIL; 482 return (0); 483 } 484 return (&satosin6(&ia6->ia_addr)->sin6_addr); 485 } 486 487 /* 488 * If the destination address is a link-local unicast address or 489 * a multicast address, and if the outgoing interface is specified 490 * by the sin6_scope_id filed, use an address associated with the 491 * interface. 492 * XXX: We're now trying to define more specific semantics of 493 * sin6_scope_id field, so this part will be rewritten in 494 * the near future. 495 */ 496 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) && 497 dstsock->sin6_scope_id) { 498 /* 499 * I'm not sure if boundary check for scope_id is done 500 * somewhere... 501 */ 502 if (dstsock->sin6_scope_id < 0 || 503 if_index < dstsock->sin6_scope_id) { 504 *errorp = ENXIO; /* XXX: better error? */ 505 return (0); 506 } 507 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id], 508 dst); 509 510 if (ia6 && jailed) { 511 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 512 if (!jailed_ip(cred->cr_prison, 513 (struct sockaddr *)&jsin6)) 514 ia6 = 0; 515 } 516 517 if (ia6 == 0) { 518 *errorp = EADDRNOTAVAIL; 519 return (0); 520 } 521 return (&satosin6(&ia6->ia_addr)->sin6_addr); 522 } 523 524 /* 525 * If the destination address is a multicast address and 526 * the outgoing interface for the address is specified 527 * by the caller, use an address associated with the interface. 528 * There is a sanity check here; if the destination has node-local 529 * scope, the outgoing interfacde should be a loopback address. 530 * Even if the outgoing interface is not specified, we also 531 * choose a loopback interface as the outgoing interface. 532 */ 533 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) { 534 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 535 536 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 537 ifp = &loif[0]; 538 } 539 540 if (ifp) { 541 ia6 = in6_ifawithscope(ifp, dst); 542 if (ia6 == 0) { 543 *errorp = EADDRNOTAVAIL; 544 return (0); 545 } 546 return (&ia6->ia_addr.sin6_addr); 547 } 548 } 549 550 /* 551 * If the next hop address for the packet is specified 552 * by caller, use an address associated with the route 553 * to the next hop. 554 */ 555 { 556 struct sockaddr_in6 *sin6_next; 557 struct rtentry *rt; 558 559 if (opts && opts->ip6po_nexthop) { 560 sin6_next = satosin6(opts->ip6po_nexthop); 561 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 562 if (rt) { 563 ia6 = in6_ifawithscope(rt->rt_ifp, dst); 564 if (ia6 == 0) 565 ia6 = ifatoia6(rt->rt_ifa); 566 } 567 if (ia6 && jailed) { 568 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 569 if (!jailed_ip(cred->cr_prison, 570 (struct sockaddr *)&jsin6)) 571 ia6 = 0; 572 } 573 574 if (ia6 == 0) { 575 *errorp = EADDRNOTAVAIL; 576 return (0); 577 } 578 return (&satosin6(&ia6->ia_addr)->sin6_addr); 579 } 580 } 581 582 /* 583 * If route is known or can be allocated now, 584 * our src addr is taken from the i/f, else punt. 585 */ 586 if (ro) { 587 if (ro->ro_rt && 588 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 589 RTFREE(ro->ro_rt); 590 ro->ro_rt = NULL; 591 } 592 if (ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL) { 593 struct sockaddr_in6 *dst6; 594 595 /* No route yet, so try to acquire one */ 596 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 597 dst6 = &ro->ro_dst; 598 dst6->sin6_family = AF_INET6; 599 dst6->sin6_len = sizeof(struct sockaddr_in6); 600 dst6->sin6_addr = *dst; 601 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) { 602 ro->ro_rt = 603 rtpurelookup((struct sockaddr *)&ro->ro_dst); 604 } else { 605 rtalloc((struct route *)ro); 606 } 607 } 608 609 /* 610 * in_pcbconnect() checks out IFF_LOOPBACK to skip using 611 * the address. But we don't know why it does so. 612 * It is necessary to ensure the scope even for lo0 613 * so doesn't check out IFF_LOOPBACK. 614 */ 615 616 if (ro->ro_rt) { 617 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); 618 if (ia6 && jailed) { 619 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 620 if (!jailed_ip(cred->cr_prison, 621 (struct sockaddr *)&jsin6)) 622 ia6 = 0; 623 } 624 625 if (ia6 == 0) /* xxx scope error ?*/ 626 ia6 = ifatoia6(ro->ro_rt->rt_ifa); 627 628 if (ia6 && jailed) { 629 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr; 630 if (!jailed_ip(cred->cr_prison, 631 (struct sockaddr *)&jsin6)) 632 ia6 = 0; 633 } 634 } 635 if (ia6 == 0) { 636 *errorp = EHOSTUNREACH; /* no route */ 637 return (0); 638 } 639 return (&satosin6(&ia6->ia_addr)->sin6_addr); 640 } 641 642 *errorp = EADDRNOTAVAIL; 643 return (0); 644 } 645 646 /* 647 * Default hop limit selection. The precedence is as follows: 648 * 1. Hoplimit valued specified via ioctl. 649 * 2. (If the outgoing interface is detected) the current 650 * hop limit of the interface specified by router advertisement. 651 * 3. The system default hoplimit. 652 */ 653 int 654 in6_selecthlim(struct in6pcb *in6p, struct ifnet *ifp) 655 { 656 if (in6p && in6p->in6p_hops >= 0) 657 return (in6p->in6p_hops); 658 else if (ifp) 659 return (ND_IFINFO(ifp)->chlim); 660 else 661 return (ip6_defhlim); 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 inp->inp_vflag = 0; 705 kfree(inp, M_PCB); 706 } 707 708 /* 709 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was 710 * modified to match the pru_sockaddr() and pru_peeraddr() entry points 711 * in struct pr_usrreqs, so that protocols can just reference then directly 712 * without the need for a wrapper function. The socket must have a valid 713 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 714 * except through a kernel programming error, so it is acceptable to panic 715 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 716 * because there actually /is/ a programming error somewhere... XXX) 717 */ 718 void 719 in6_setsockaddr_dispatch(netmsg_t msg) 720 { 721 int error; 722 723 error = in6_setsockaddr(msg->sockaddr.base.nm_so, msg->sockaddr.nm_nam); 724 lwkt_replymsg(&msg->sockaddr.base.lmsg, error); 725 } 726 727 int 728 in6_setsockaddr(struct socket *so, struct sockaddr **nam) 729 { 730 struct inpcb *inp; 731 struct sockaddr_in6 *sin6; 732 733 /* 734 * Do the malloc first in case it blocks. 735 */ 736 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, 737 M_WAITOK | M_ZERO); 738 sin6->sin6_family = AF_INET6; 739 sin6->sin6_len = sizeof(*sin6); 740 741 crit_enter(); 742 inp = so->so_pcb; 743 if (!inp) { 744 crit_exit(); 745 kfree(sin6, M_SONAME); 746 return EINVAL; 747 } 748 sin6->sin6_port = inp->inp_lport; 749 sin6->sin6_addr = inp->in6p_laddr; 750 crit_exit(); 751 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 752 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 753 else 754 sin6->sin6_scope_id = 0; /*XXX*/ 755 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 756 sin6->sin6_addr.s6_addr16[1] = 0; 757 758 *nam = (struct sockaddr *)sin6; 759 return 0; 760 } 761 762 void 763 in6_setpeeraddr_dispatch(netmsg_t msg) 764 { 765 int error; 766 767 error = in6_setpeeraddr(msg->peeraddr.base.nm_so, msg->peeraddr.nm_nam); 768 lwkt_replymsg(&msg->peeraddr.base.lmsg, error); 769 } 770 771 int 772 in6_setpeeraddr(struct socket *so, struct sockaddr **nam) 773 { 774 struct inpcb *inp; 775 struct sockaddr_in6 *sin6; 776 777 /* 778 * Do the malloc first in case it blocks. 779 */ 780 MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, 781 M_WAITOK | M_ZERO); 782 sin6->sin6_family = AF_INET6; 783 sin6->sin6_len = sizeof(struct sockaddr_in6); 784 785 crit_enter(); 786 inp = so->so_pcb; 787 if (!inp) { 788 crit_exit(); 789 kfree(sin6, M_SONAME); 790 return EINVAL; 791 } 792 sin6->sin6_port = inp->inp_fport; 793 sin6->sin6_addr = inp->in6p_faddr; 794 crit_exit(); 795 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 796 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 797 else 798 sin6->sin6_scope_id = 0; /*XXX*/ 799 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 800 sin6->sin6_addr.s6_addr16[1] = 0; 801 802 *nam = (struct sockaddr *)sin6; 803 return 0; 804 } 805 806 void 807 in6_mapped_sockaddr_dispatch(netmsg_t msg) 808 { 809 int error; 810 811 error = in6_mapped_sockaddr(msg->sockaddr.base.nm_so, 812 msg->sockaddr.nm_nam); 813 lwkt_replymsg(&msg->sockaddr.base.lmsg, error); 814 } 815 816 int 817 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 818 { 819 struct inpcb *inp = so->so_pcb; 820 int error; 821 822 if (inp == NULL) 823 return EINVAL; 824 if (inp->inp_vflag & INP_IPV4) { 825 error = in_setsockaddr(so, nam); 826 if (error == 0) 827 in6_sin_2_v4mapsin6_in_sock(nam); 828 } else 829 /* scope issues will be handled in in6_setsockaddr(). */ 830 error = in6_setsockaddr(so, nam); 831 832 return error; 833 } 834 835 int 836 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 837 { 838 struct inpcb *inp = so->so_pcb; 839 int error; 840 841 if (inp == NULL) 842 return EINVAL; 843 if (inp->inp_vflag & INP_IPV4) { 844 error = in_setpeeraddr(so, nam); 845 if (error == 0) 846 in6_sin_2_v4mapsin6_in_sock(nam); 847 } else 848 /* scope issues will be handled in in6_setpeeraddr(). */ 849 error = in6_setpeeraddr(so, nam); 850 851 return error; 852 } 853 854 void 855 in6_mapped_peeraddr_dispatch(netmsg_t msg) 856 { 857 int error; 858 859 error = in6_mapped_peeraddr(msg->base.nm_so, msg->peeraddr.nm_nam); 860 lwkt_replymsg(&msg->base.lmsg, error); 861 } 862 863 /* 864 * Pass some notification to all connections of a protocol 865 * associated with address dst. The local address and/or port numbers 866 * may be specified to limit the search. The "usual action" will be 867 * taken, depending on the ctlinput cmd. The caller must filter any 868 * cmds that are uninteresting (e.g., no error in the map). 869 * Call the protocol specific routine (if any) to report 870 * any errors for each matching socket. 871 * 872 * Must be called under crit_enter(). 873 */ 874 void 875 in6_pcbnotify(struct inpcbhead *head, struct sockaddr *dst, in_port_t fport, 876 const struct sockaddr *src, in_port_t lport, int cmd, int arg, 877 void (*notify) (struct inpcb *, int)) 878 { 879 struct inpcb *inp, *ninp; 880 struct sockaddr_in6 sa6_src, *sa6_dst; 881 u_int32_t flowinfo; 882 883 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 884 return; 885 886 sa6_dst = (struct sockaddr_in6 *)dst; 887 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 888 return; 889 890 /* 891 * note that src can be NULL when we get notify by local fragmentation. 892 */ 893 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 894 flowinfo = sa6_src.sin6_flowinfo; 895 896 /* 897 * Redirects go to all references to the destination, 898 * and use in6_rtchange to invalidate the route cache. 899 * Dead host indications: also use in6_rtchange to invalidate 900 * the cache, and deliver the error to all the sockets. 901 * Otherwise, if we have knowledge of the local port and address, 902 * deliver only to that socket. 903 */ 904 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 905 fport = 0; 906 lport = 0; 907 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 908 909 if (cmd != PRC_HOSTDEAD) 910 notify = in6_rtchange; 911 } 912 if (cmd != PRC_MSGSIZE) 913 arg = inet6ctlerrmap[cmd]; 914 crit_enter(); 915 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) { 916 ninp = LIST_NEXT(inp, inp_list); 917 918 if (inp->inp_flags & INP_PLACEMARKER) 919 continue; 920 921 if ((inp->inp_vflag & INP_IPV6) == 0) 922 continue; 923 /* 924 * If the error designates a new path MTU for a destination 925 * and the application (associated with this socket) wanted to 926 * know the value, notify. Note that we notify for all 927 * disconnected sockets if the corresponding application 928 * wanted. This is because some UDP applications keep sending 929 * sockets disconnected. 930 * XXX: should we avoid to notify the value to TCP sockets? 931 */ 932 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 933 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 934 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 935 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, &arg); 936 } 937 938 /* 939 * Detect if we should notify the error. If no source and 940 * destination ports are specifed, but non-zero flowinfo and 941 * local address match, notify the error. This is the case 942 * when the error is delivered with an encrypted buffer 943 * by ESP. Otherwise, just compare addresses and ports 944 * as usual. 945 */ 946 if (lport == 0 && fport == 0 && flowinfo && 947 inp->inp_socket != NULL && 948 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 949 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 950 goto do_notify; 951 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 952 &sa6_dst->sin6_addr) || 953 inp->inp_socket == 0 || 954 (lport && inp->inp_lport != lport) || 955 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 956 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 957 &sa6_src.sin6_addr)) || 958 (fport && inp->inp_fport != fport)) 959 continue; 960 961 do_notify: 962 if (notify) 963 (*notify)(inp, arg); 964 } 965 crit_exit(); 966 } 967 968 /* 969 * Lookup a PCB based on the local address and port. 970 */ 971 struct inpcb * 972 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 973 u_int lport_arg, int wild_okay, struct ucred *cred) 974 { 975 struct inpcb *inp; 976 int matchwild = 3, wildcard; 977 u_short lport = lport_arg; 978 struct inpcbporthead *porthash; 979 struct inpcbport *phd; 980 struct inpcb *match = NULL; 981 982 /* 983 * If the porthashbase is shared across several cpus we need 984 * to lock. 985 */ 986 if (pcbinfo->porttoken) 987 lwkt_gettoken(pcbinfo->porttoken); 988 989 /* 990 * Best fit PCB lookup. 991 * 992 * First see if this local port is in use by looking on the 993 * port hash list. 994 */ 995 porthash = &pcbinfo->porthashbase[ 996 INP_PCBPORTHASH(lport, pcbinfo->porthashmask)]; 997 LIST_FOREACH(phd, porthash, phd_hash) { 998 if (phd->phd_port == lport) 999 break; 1000 } 1001 1002 if (phd != NULL) { 1003 /* 1004 * Port is in use by one or more PCBs. Look for best 1005 * fit. 1006 */ 1007 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 1008 wildcard = 0; 1009 if ((inp->inp_vflag & INP_IPV6) == 0) 1010 continue; 1011 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 1012 wildcard++; 1013 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1014 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 1015 wildcard++; 1016 else if (!IN6_ARE_ADDR_EQUAL( 1017 &inp->in6p_laddr, laddr)) 1018 continue; 1019 } else { 1020 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 1021 wildcard++; 1022 } 1023 if (wildcard && !wild_okay) 1024 continue; 1025 if (wildcard < matchwild && 1026 (cred == NULL || 1027 cred->cr_prison == 1028 inp->inp_socket->so_cred->cr_prison)) { 1029 match = inp; 1030 matchwild = wildcard; 1031 if (wildcard == 0) 1032 break; 1033 else 1034 matchwild = wildcard; 1035 } 1036 } 1037 } 1038 if (pcbinfo->porttoken) 1039 lwkt_reltoken(pcbinfo->porttoken); 1040 1041 return (match); 1042 } 1043 1044 void 1045 in6_pcbpurgeif0(struct in6pcb *head, struct ifnet *ifp) 1046 { 1047 struct in6pcb *in6p; 1048 struct ip6_moptions *im6o; 1049 struct in6_multi_mship *imm, *nimm; 1050 1051 for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) { 1052 if (in6p->in6p_flags & INP_PLACEMARKER) 1053 continue; 1054 im6o = in6p->in6p_moptions; 1055 if ((in6p->inp_vflag & INP_IPV6) && 1056 im6o) { 1057 /* 1058 * Unselect the outgoing interface if it is being 1059 * detached. 1060 */ 1061 if (im6o->im6o_multicast_ifp == ifp) 1062 im6o->im6o_multicast_ifp = NULL; 1063 1064 /* 1065 * Drop multicast group membership if we joined 1066 * through the interface being detached. 1067 * XXX controversial - is it really legal for kernel 1068 * to force this? 1069 */ 1070 for (imm = im6o->im6o_memberships.lh_first; 1071 imm != NULL; imm = nimm) { 1072 nimm = imm->i6mm_chain.le_next; 1073 if (imm->i6mm_maddr->in6m_ifp == ifp) { 1074 LIST_REMOVE(imm, i6mm_chain); 1075 in6_delmulti(imm->i6mm_maddr); 1076 kfree(imm, M_IPMADDR); 1077 } 1078 } 1079 } 1080 } 1081 } 1082 1083 /* 1084 * Check for alternatives when higher level complains 1085 * about service problems. For now, invalidate cached 1086 * routing information. If the route was created dynamically 1087 * (by a redirect), time to try a default gateway again. 1088 */ 1089 void 1090 in6_losing(struct inpcb *in6p) 1091 { 1092 struct rtentry *rt; 1093 struct rt_addrinfo info; 1094 1095 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 1096 bzero((caddr_t)&info, sizeof(info)); 1097 info.rti_flags = rt->rt_flags; 1098 info.rti_info[RTAX_DST] = rt_key(rt); 1099 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1100 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1101 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 1102 if (rt->rt_flags & RTF_DYNAMIC) 1103 rtrequest1_global(RTM_DELETE, &info, NULL, NULL); 1104 in6p->in6p_route.ro_rt = NULL; 1105 rtfree(rt); 1106 /* 1107 * A new route can be allocated 1108 * the next time output is attempted. 1109 */ 1110 } 1111 } 1112 1113 /* 1114 * After a routing change, flush old routing 1115 * and allocate a (hopefully) better one. 1116 */ 1117 void 1118 in6_rtchange(struct inpcb *inp, int error) 1119 { 1120 if (inp->in6p_route.ro_rt) { 1121 rtfree(inp->in6p_route.ro_rt); 1122 inp->in6p_route.ro_rt = 0; 1123 /* 1124 * A new route can be allocated the next time 1125 * output is attempted. 1126 */ 1127 } 1128 } 1129 1130 /* 1131 * Lookup PCB in hash list. 1132 */ 1133 struct inpcb * 1134 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1135 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1136 int wildcard, struct ifnet *ifp) 1137 { 1138 struct inpcbhead *head; 1139 struct inpcb *inp; 1140 struct inpcb *jinp = NULL; 1141 u_short fport = fport_arg, lport = lport_arg; 1142 int faith; 1143 1144 if (faithprefix_p != NULL) 1145 faith = (*faithprefix_p)(laddr); 1146 else 1147 faith = 0; 1148 1149 /* 1150 * First look for an exact match. 1151 */ 1152 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */, 1153 fport, 1154 laddr->s6_addr32[3], /* XXX JH */ 1155 lport, 1156 pcbinfo->hashmask)]; 1157 LIST_FOREACH(inp, head, inp_hash) { 1158 if ((inp->inp_vflag & INP_IPV6) == 0) 1159 continue; 1160 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1161 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1162 inp->inp_fport == fport && 1163 inp->inp_lport == lport) { 1164 /* 1165 * Found. 1166 */ 1167 if (inp->inp_socket == NULL || 1168 inp->inp_socket->so_cred->cr_prison == NULL) { 1169 return (inp); 1170 } else { 1171 if (jinp == NULL) 1172 jinp = inp; 1173 } 1174 } 1175 } 1176 if (jinp != NULL) 1177 return(jinp); 1178 if (wildcard) { 1179 struct inpcontainerhead *chead; 1180 struct inpcontainer *ic; 1181 struct inpcb *local_wild = NULL; 1182 struct inpcb *jinp_wild = NULL; 1183 struct sockaddr_in6 jsin6; 1184 struct ucred *cred; 1185 1186 /* 1187 * Order of socket selection: 1188 * 1. non-jailed, non-wild. 1189 * 2. non-jailed, wild. 1190 * 3. jailed, non-wild. 1191 * 4. jailed, wild. 1192 */ 1193 jsin6.sin6_family = AF_INET6; 1194 chead = &pcbinfo->wildcardhashbase[INP_PCBWILDCARDHASH(lport, 1195 pcbinfo->wildcardhashmask)]; 1196 LIST_FOREACH(ic, chead, ic_list) { 1197 inp = ic->ic_inp; 1198 1199 if (!(inp->inp_vflag & INP_IPV6)) 1200 continue; 1201 if (inp->inp_socket != NULL) 1202 cred = inp->inp_socket->so_cred; 1203 else 1204 cred = NULL; 1205 1206 if (cred != NULL && jailed(cred)) { 1207 if (jinp != NULL) { 1208 continue; 1209 } else { 1210 jsin6.sin6_addr = *laddr; 1211 if (!jailed_ip(cred->cr_prison, 1212 (struct sockaddr *)&jsin6)) 1213 continue; 1214 } 1215 } 1216 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 1217 inp->inp_lport == lport) { 1218 if (faith && (inp->inp_flags & INP_FAITH) == 0) 1219 continue; 1220 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 1221 laddr)) { 1222 if (cred != NULL && jailed(cred)) 1223 jinp = inp; 1224 else 1225 return (inp); 1226 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1227 if (cred != NULL && jailed(cred)) 1228 jinp_wild = inp; 1229 else 1230 local_wild = inp; 1231 } 1232 } 1233 } 1234 if (local_wild != NULL) 1235 return (local_wild); 1236 if (jinp != NULL) 1237 return (jinp); 1238 return (jinp_wild); 1239 } 1240 1241 /* 1242 * Not found. 1243 */ 1244 return (NULL); 1245 } 1246 1247 void 1248 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 1249 { 1250 struct ip6_hdr *ip; 1251 1252 ip = mtod(m, struct ip6_hdr *); 1253 bzero(sin6, sizeof(*sin6)); 1254 sin6->sin6_len = sizeof(*sin6); 1255 sin6->sin6_family = AF_INET6; 1256 sin6->sin6_addr = ip->ip6_src; 1257 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1258 sin6->sin6_addr.s6_addr16[1] = 0; 1259 sin6->sin6_scope_id = 1260 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 1261 ? m->m_pkthdr.rcvif->if_index : 0; 1262 1263 return; 1264 } 1265