| 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 | struct inpcbporthead *porthash; |
| 142 | int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); |
| 143 | struct ucred *cred = NULL; |
| 144 | struct inpcb *t; |
| 145 | u_short lport, lport_ho; |
| 146 | |
| 147 | if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) |
| 148 | wild = 1; |
| 149 | if (td->td_proc != NULL) |
| 150 | cred = td->td_proc->p_ucred; |
| 151 | |
| 152 | if (nam->sa_len != sizeof(*sin6)) |
| 153 | return (EINVAL); |
| 154 | /* |
| 155 | * family check. |
| 156 | */ |
| 157 | if (nam->sa_family != AF_INET6) |
| 158 | return (EAFNOSUPPORT); |
| 159 | |
| 160 | /* Reject v4-mapped address */ |
| 161 | if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) |
| 162 | return (EADDRNOTAVAIL); |
| 163 | |
| 164 | if (!prison_replace_wildcards(td, nam)) |
| 165 | return (EINVAL); |
| 166 | |
| 167 | /* KAME hack: embed scopeid */ |
| 168 | if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0) |
| 169 | return (EINVAL); |
| 170 | /* this must be cleared for ifa_ifwithaddr() */ |
| 171 | sin6->sin6_scope_id = 0; |
| 172 | |
| 173 | lport = sin6->sin6_port; |
| 174 | if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { |
| 175 | /* |
| 176 | * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; |
| 177 | * allow compepte duplication of binding if |
| 178 | * SO_REUSEPORT is set, or if SO_REUSEADDR is set |
| 179 | * and a multicast address is bound on both |
| 180 | * new and duplicated sockets. |
| 181 | */ |
| 182 | if (so->so_options & SO_REUSEADDR) |
| 183 | reuseport = SO_REUSEADDR|SO_REUSEPORT; |
| 184 | } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { |
| 185 | struct ifaddr *ia = NULL; |
| 186 | |
| 187 | sin6->sin6_port = 0; /* yech... */ |
| 188 | if (!prison_replace_wildcards(td, (struct sockaddr *)sin6)) { |
| 189 | sin6->sin6_addr = kin6addr_any; |
| 190 | return (EINVAL); |
| 191 | } |
| 192 | if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == NULL) |
| 193 | return (EADDRNOTAVAIL); |
| 194 | |
| 195 | /* |
| 196 | * XXX: bind to an anycast address might accidentally |
| 197 | * cause sending a packet with anycast source address. |
| 198 | * We should allow to bind to a deprecated address, since |
| 199 | * the application dares to use it. |
| 200 | */ |
| 201 | if (ia && |
| 202 | ((struct in6_ifaddr *)ia)->ia6_flags & |
| 203 | (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) |
| 204 | return (EADDRNOTAVAIL); |
| 205 | } |
| 206 | |
| 207 | inp->in6p_laddr = sin6->sin6_addr; |
| 208 | |
| 209 | if (lport == 0) |
| 210 | goto auto_select; |
| 211 | lport_ho = ntohs(lport); |
| 212 | |
| 213 | /* GROSS */ |
| 214 | if (lport_ho < IPV6PORT_RESERVED && cred && |
| 215 | priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0)) { |
| 216 | inp->in6p_laddr = kin6addr_any; |
| 217 | return (EACCES); |
| 218 | } |
| 219 | |
| 220 | /* |
| 221 | * Locate the proper portinfo based on lport |
| 222 | */ |
| 223 | pcbinfo = inp->inp_pcbinfo; |
| 224 | portinfo = |
| 225 | &pcbinfo->portinfo[lport_ho & pcbinfo->portinfo_mask]; |
| 226 | KKASSERT((lport_ho & pcbinfo->portinfo_mask) == |
| 227 | portinfo->offset); |
| 228 | |
| 229 | /* |
| 230 | * This has to be atomic. If the porthash is shared across |
| 231 | * multiple protocol threads (aka tcp) then the token must |
| 232 | * be held. |
| 233 | */ |
| 234 | porthash = in_pcbporthash_head(portinfo, lport); |
| 235 | GET_PORTHASH_TOKEN(porthash); |
| 236 | |
| 237 | if (so->so_cred->cr_uid != 0 && |
| 238 | !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { |
| 239 | t = in6_pcblookup_local(porthash, |
| 240 | &sin6->sin6_addr, lport, INPLOOKUP_WILDCARD, cred); |
| 241 | if (t && |
| 242 | (so->so_cred->cr_uid != |
| 243 | t->inp_socket->so_cred->cr_uid)) { |
| 244 | inp->in6p_laddr = kin6addr_any; |
| 245 | error = EADDRINUSE; |
| 246 | goto done; |
| 247 | } |
| 248 | } |
| 249 | if (cred && cred->cr_prison && |
| 250 | !prison_replace_wildcards(td, nam)) { |
| 251 | inp->in6p_laddr = kin6addr_any; |
| 252 | error = EADDRNOTAVAIL; |
| 253 | goto done; |
| 254 | } |
| 255 | t = in6_pcblookup_local(porthash, &sin6->sin6_addr, lport, |
| 256 | wild, cred); |
| 257 | if (t && (reuseport & t->inp_socket->so_options) == 0) { |
| 258 | inp->in6p_laddr = kin6addr_any; |
| 259 | error = EADDRINUSE; |
| 260 | goto done; |
| 261 | } |
| 262 | |
| 263 | inp->inp_lport = lport; |
| 264 | in_pcbinsporthash(porthash, inp); |
| 265 | error = 0; |
| 266 | done: |
| 267 | REL_PORTHASH_TOKEN(porthash); |
| 268 | return (error); |
| 269 | } else { |
| 270 | auto_select: |
| 271 | jsin6.sin6_addr = inp->in6p_laddr; |
| 272 | jsin6.sin6_family = AF_INET6; |
| 273 | if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin6)) { |
| 274 | inp->in6p_laddr = kin6addr_any; |
| 275 | inp->inp_lport = 0; |
| 276 | return (EINVAL); |
| 277 | } |
| 278 | |
| 279 | return in6_pcbsetlport(&inp->in6p_laddr, inp, td); |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | /* |
| 284 | * Transform old in6_pcbconnect() into an inner subroutine for new |
| 285 | * in6_pcbconnect(): Do some validity-checking on the remote |
| 286 | * address (in mbuf 'nam') and then determine local host address |
| 287 | * (i.e., which interface) to use to access that remote host. |
| 288 | * |
| 289 | * This preserves definition of in6_pcbconnect(), while supporting a |
| 290 | * slightly different version for T/TCP. (This is more than |
| 291 | * a bit of a kludge, but cleaning up the internal interfaces would |
| 292 | * have forced minor changes in every protocol). |
| 293 | */ |
| 294 | |
| 295 | int |
| 296 | in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam, |
| 297 | struct in6_addr **plocal_addr6, struct thread *td) |
| 298 | { |
| 299 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; |
| 300 | struct ifnet *ifp = NULL; |
| 301 | int error = 0; |
| 302 | |
| 303 | if (nam->sa_len != sizeof (*sin6)) |
| 304 | return (EINVAL); |
| 305 | if (sin6->sin6_family != AF_INET6) |
| 306 | return (EAFNOSUPPORT); |
| 307 | if (sin6->sin6_port == 0) |
| 308 | return (EADDRNOTAVAIL); |
| 309 | |
| 310 | /* KAME hack: embed scopeid */ |
| 311 | if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0) |
| 312 | return EINVAL; |
| 313 | |
| 314 | if (in6_ifaddr) { |
| 315 | /* |
| 316 | * If the destination address is UNSPECIFIED addr, |
| 317 | * use the loopback addr, e.g ::1. |
| 318 | */ |
| 319 | if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) |
| 320 | sin6->sin6_addr = kin6addr_loopback; |
| 321 | } |
| 322 | { |
| 323 | /* |
| 324 | * XXX: in6_selectsrc might replace the bound local address |
| 325 | * with the address specified by setsockopt(IPV6_PKTINFO). |
| 326 | * Is it the intended behavior? |
| 327 | */ |
| 328 | *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, |
| 329 | inp->in6p_moptions, |
| 330 | &inp->in6p_route, |
| 331 | &inp->in6p_laddr, &error, td); |
| 332 | if (*plocal_addr6 == NULL) { |
| 333 | if (error == 0) |
| 334 | error = EADDRNOTAVAIL; |
| 335 | return (error); |
| 336 | } |
| 337 | /* |
| 338 | * Don't do pcblookup call here; return interface in |
| 339 | * plocal_addr6 |
| 340 | * and exit to caller, that will do the lookup. |
| 341 | */ |
| 342 | } |
| 343 | |
| 344 | if (inp->in6p_route.ro_rt) |
| 345 | ifp = inp->in6p_route.ro_rt->rt_ifp; |
| 346 | |
| 347 | return (0); |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * Outer subroutine: |
| 352 | * Connect from a socket to a specified address. |
| 353 | * Both address and port must be specified in argument sin. |
| 354 | * If don't have a local address for this socket yet, |
| 355 | * then pick one. |
| 356 | */ |
| 357 | int |
| 358 | in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td) |
| 359 | { |
| 360 | struct in6_addr *addr6; |
| 361 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; |
| 362 | int error; |
| 363 | |
| 364 | /* Reject v4-mapped address */ |
| 365 | if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) |
| 366 | return EADDRNOTAVAIL; |
| 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_pcbinfo, &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 | void |
| 403 | in6_pcbdisconnect(struct inpcb *inp) |
| 404 | { |
| 405 | bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); |
| 406 | inp->inp_fport = 0; |
| 407 | /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ |
| 408 | inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; |
| 409 | in_pcbremconnhash(inp); |
| 410 | if (inp->inp_socket->so_state & SS_NOFDREF) |
| 411 | in6_pcbdetach(inp); |
| 412 | } |
| 413 | |
| 414 | void |
| 415 | in6_pcbdetach(struct inpcb *inp) |
| 416 | { |
| 417 | struct socket *so = inp->inp_socket; |
| 418 | struct inpcbinfo *ipi = inp->inp_pcbinfo; |
| 419 | |
| 420 | #ifdef IPSEC |
| 421 | if (inp->in6p_sp != NULL) |
| 422 | ipsec6_delete_pcbpolicy(inp); |
| 423 | #endif /* IPSEC */ |
| 424 | inp->inp_gencnt = ++ipi->ipi_gencnt; |
| 425 | in_pcbremlists(inp); |
| 426 | so->so_pcb = NULL; |
| 427 | KKASSERT((so->so_state & SS_ASSERTINPROG) == 0); |
| 428 | sofree(so); /* remove pcb ref */ |
| 429 | |
| 430 | if (inp->in6p_options) |
| 431 | m_freem(inp->in6p_options); |
| 432 | ip6_freepcbopts(inp->in6p_outputopts); |
| 433 | ip6_freemoptions(inp->in6p_moptions); |
| 434 | if (inp->in6p_route.ro_rt) |
| 435 | rtfree(inp->in6p_route.ro_rt); |
| 436 | /* Check and free IPv4 related resources in case of mapped addr */ |
| 437 | if (inp->inp_options) |
| 438 | m_free(inp->inp_options); |
| 439 | ip_freemoptions(inp->inp_moptions); |
| 440 | |
| 441 | kfree(inp, M_PCB); |
| 442 | } |
| 443 | |
| 444 | /* |
| 445 | * The socket may have an invalid PCB, i.e. NULL. For example, a TCP |
| 446 | * socket received RST. |
| 447 | */ |
| 448 | static int |
| 449 | in6_setsockaddr(struct socket *so, struct sockaddr **nam) |
| 450 | { |
| 451 | struct inpcb *inp; |
| 452 | struct sockaddr_in6 *sin6; |
| 453 | |
| 454 | KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr")); |
| 455 | inp = so->so_pcb; |
| 456 | if (!inp) |
| 457 | return EINVAL; |
| 458 | |
| 459 | sin6 = kmalloc(sizeof *sin6, M_SONAME, M_WAITOK | M_ZERO); |
| 460 | sin6->sin6_family = AF_INET6; |
| 461 | sin6->sin6_len = sizeof(*sin6); |
| 462 | sin6->sin6_port = inp->inp_lport; |
| 463 | sin6->sin6_addr = inp->in6p_laddr; |
| 464 | if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) |
| 465 | sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); |
| 466 | else |
| 467 | sin6->sin6_scope_id = 0; /*XXX*/ |
| 468 | if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) |
| 469 | sin6->sin6_addr.s6_addr16[1] = 0; |
| 470 | |
| 471 | *nam = (struct sockaddr *)sin6; |
| 472 | return 0; |
| 473 | } |
| 474 | |
| 475 | void |
| 476 | in6_setsockaddr_dispatch(netmsg_t msg) |
| 477 | { |
| 478 | int error; |
| 479 | |
| 480 | error = in6_setsockaddr(msg->sockaddr.base.nm_so, msg->sockaddr.nm_nam); |
| 481 | lwkt_replymsg(&msg->sockaddr.base.lmsg, error); |
| 482 | } |
| 483 | |
| 484 | void |
| 485 | in6_setpeeraddr_dispatch(netmsg_t msg) |
| 486 | { |
| 487 | int error; |
| 488 | |
| 489 | error = in6_setpeeraddr(msg->peeraddr.base.nm_so, msg->peeraddr.nm_nam); |
| 490 | lwkt_replymsg(&msg->peeraddr.base.lmsg, error); |
| 491 | } |
| 492 | |
| 493 | /* |
| 494 | * The socket may have an invalid PCB, i.e. NULL. For example, a TCP |
| 495 | * socket received RST. |
| 496 | */ |
| 497 | int |
| 498 | in6_setpeeraddr(struct socket *so, struct sockaddr **nam) |
| 499 | { |
| 500 | struct inpcb *inp; |
| 501 | struct sockaddr_in6 *sin6; |
| 502 | |
| 503 | KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr")); |
| 504 | inp = so->so_pcb; |
| 505 | if (!inp) |
| 506 | return EINVAL; |
| 507 | |
| 508 | sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO); |
| 509 | sin6->sin6_family = AF_INET6; |
| 510 | sin6->sin6_len = sizeof(struct sockaddr_in6); |
| 511 | sin6->sin6_port = inp->inp_fport; |
| 512 | sin6->sin6_addr = inp->in6p_faddr; |
| 513 | if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) |
| 514 | sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); |
| 515 | else |
| 516 | sin6->sin6_scope_id = 0; /*XXX*/ |
| 517 | if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) |
| 518 | sin6->sin6_addr.s6_addr16[1] = 0; |
| 519 | |
| 520 | *nam = (struct sockaddr *)sin6; |
| 521 | return 0; |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * Pass some notification to all connections of a protocol |
| 526 | * associated with address dst. The local address and/or port numbers |
| 527 | * may be specified to limit the search. The "usual action" will be |
| 528 | * taken, depending on the ctlinput cmd. The caller must filter any |
| 529 | * cmds that are uninteresting (e.g., no error in the map). |
| 530 | * Call the protocol specific routine (if any) to report |
| 531 | * any errors for each matching socket. |
| 532 | */ |
| 533 | void |
| 534 | in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, in_port_t fport, |
| 535 | const struct sockaddr *src, in_port_t lport, int cmd, int arg, |
| 536 | inp_notify_t notify) |
| 537 | { |
| 538 | struct inpcb *inp, *marker; |
| 539 | struct sockaddr_in6 sa6_src, *sa6_dst; |
| 540 | u_int32_t flowinfo; |
| 541 | |
| 542 | if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) |
| 543 | return; |
| 544 | |
| 545 | sa6_dst = (struct sockaddr_in6 *)dst; |
| 546 | if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) |
| 547 | return; |
| 548 | |
| 549 | /* |
| 550 | * note that src can be NULL when we get notify by local fragmentation. |
| 551 | */ |
| 552 | sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; |
| 553 | flowinfo = sa6_src.sin6_flowinfo; |
| 554 | |
| 555 | /* |
| 556 | * Redirects go to all references to the destination, |
| 557 | * and use in6_rtchange to invalidate the route cache. |
| 558 | * Dead host indications: also use in6_rtchange to invalidate |
| 559 | * the cache, and deliver the error to all the sockets. |
| 560 | * Otherwise, if we have knowledge of the local port and address, |
| 561 | * deliver only to that socket. |
| 562 | */ |
| 563 | if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { |
| 564 | fport = 0; |
| 565 | lport = 0; |
| 566 | bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); |
| 567 | |
| 568 | if (cmd != PRC_HOSTDEAD) |
| 569 | notify = in6_rtchange; |
| 570 | } |
| 571 | if (cmd != PRC_MSGSIZE) |
| 572 | arg = inet6ctlerrmap[cmd]; |
| 573 | |
| 574 | marker = in_pcbmarker(mycpuid); |
| 575 | |
| 576 | GET_PCBINFO_TOKEN(pcbinfo); |
| 577 | |
| 578 | LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); |
| 579 | while ((inp = LIST_NEXT(marker, inp_list)) != NULL) { |
| 580 | LIST_REMOVE(marker, inp_list); |
| 581 | LIST_INSERT_AFTER(inp, marker, inp_list); |
| 582 | |
| 583 | if (inp->inp_flags & INP_PLACEMARKER) |
| 584 | continue; |
| 585 | |
| 586 | if (!INP_ISIPV6(inp)) |
| 587 | continue; |
| 588 | /* |
| 589 | * If the error designates a new path MTU for a destination |
| 590 | * and the application (associated with this socket) wanted to |
| 591 | * know the value, notify. Note that we notify for all |
| 592 | * disconnected sockets if the corresponding application |
| 593 | * wanted. This is because some UDP applications keep sending |
| 594 | * sockets disconnected. |
| 595 | * XXX: should we avoid to notify the value to TCP sockets? |
| 596 | */ |
| 597 | if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && |
| 598 | (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || |
| 599 | IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { |
| 600 | ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, &arg); |
| 601 | } |
| 602 | |
| 603 | /* |
| 604 | * Detect if we should notify the error. If no source and |
| 605 | * destination ports are specifed, but non-zero flowinfo and |
| 606 | * local address match, notify the error. This is the case |
| 607 | * when the error is delivered with an encrypted buffer |
| 608 | * by ESP. Otherwise, just compare addresses and ports |
| 609 | * as usual. |
| 610 | */ |
| 611 | if (lport == 0 && fport == 0 && flowinfo && |
| 612 | inp->inp_socket != NULL && |
| 613 | flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && |
| 614 | IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) |
| 615 | goto do_notify; |
| 616 | else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, |
| 617 | &sa6_dst->sin6_addr) || |
| 618 | inp->inp_socket == 0 || |
| 619 | (lport && inp->inp_lport != lport) || |
| 620 | (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && |
| 621 | !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, |
| 622 | &sa6_src.sin6_addr)) || |
| 623 | (fport && inp->inp_fport != fport)) |
| 624 | continue; |
| 625 | |
| 626 | do_notify: |
| 627 | if (notify) |
| 628 | (*notify)(inp, arg); |
| 629 | } |
| 630 | LIST_REMOVE(marker, inp_list); |
| 631 | |
| 632 | REL_PCBINFO_TOKEN(pcbinfo); |
| 633 | } |
| 634 | |
| 635 | /* |
| 636 | * Lookup a PCB based on the local address and port. |
| 637 | */ |
| 638 | struct inpcb * |
| 639 | in6_pcblookup_local(struct inpcbporthead *porthash, |
| 640 | const struct in6_addr *laddr, u_int lport_arg, int wild_okay, |
| 641 | struct ucred *cred) |
| 642 | { |
| 643 | struct inpcb *inp; |
| 644 | int matchwild = 3, wildcard; |
| 645 | u_short lport = lport_arg; |
| 646 | struct inpcbport *phd; |
| 647 | struct inpcb *match = NULL; |
| 648 | |
| 649 | /* |
| 650 | * If the porthashbase is shared across several cpus, it must |
| 651 | * have been locked. |
| 652 | */ |
| 653 | ASSERT_PORTHASH_TOKEN_HELD(porthash); |
| 654 | |
| 655 | /* |
| 656 | * Best fit PCB lookup. |
| 657 | * |
| 658 | * First see if this local port is in use by looking on the |
| 659 | * port hash list. |
| 660 | */ |
| 661 | LIST_FOREACH(phd, porthash, phd_hash) { |
| 662 | if (phd->phd_port == lport) |
| 663 | break; |
| 664 | } |
| 665 | |
| 666 | if (phd != NULL) { |
| 667 | /* |
| 668 | * Port is in use by one or more PCBs. Look for best |
| 669 | * fit. |
| 670 | */ |
| 671 | LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { |
| 672 | wildcard = 0; |
| 673 | if (!INP_ISIPV6(inp)) |
| 674 | continue; |
| 675 | if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) |
| 676 | wildcard++; |
| 677 | if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { |
| 678 | if (IN6_IS_ADDR_UNSPECIFIED(laddr)) |
| 679 | wildcard++; |
| 680 | else if (!IN6_ARE_ADDR_EQUAL( |
| 681 | &inp->in6p_laddr, laddr)) |
| 682 | continue; |
| 683 | } else { |
| 684 | if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) |
| 685 | wildcard++; |
| 686 | } |
| 687 | if (wildcard && !wild_okay) |
| 688 | continue; |
| 689 | if (wildcard < matchwild && |
| 690 | (cred == NULL || |
| 691 | cred->cr_prison == |
| 692 | inp->inp_socket->so_cred->cr_prison)) { |
| 693 | match = inp; |
| 694 | matchwild = wildcard; |
| 695 | if (wildcard == 0) |
| 696 | break; |
| 697 | else |
| 698 | matchwild = wildcard; |
| 699 | } |
| 700 | } |
| 701 | } |
| 702 | return (match); |
| 703 | } |
| 704 | |
| 705 | void |
| 706 | in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) |
| 707 | { |
| 708 | struct in6pcb *in6p, *marker; |
| 709 | struct ip6_moptions *im6o; |
| 710 | struct in6_multi_mship *imm, *nimm; |
| 711 | |
| 712 | /* |
| 713 | * We only need to make sure that we are in netisr0, where all |
| 714 | * multicast operation happen. We could check inpcbinfo which |
| 715 | * does not belong to netisr0 by holding the inpcbinfo's token. |
| 716 | * In this case, the pcbinfo must be able to be shared, i.e. |
| 717 | * pcbinfo->infotoken is not NULL. |
| 718 | */ |
| 719 | ASSERT_IN_NETISR(0); |
| 720 | KASSERT(pcbinfo->cpu == 0 || pcbinfo->infotoken != NULL, |
| 721 | ("pcbinfo could not be shared")); |
| 722 | |
| 723 | /* |
| 724 | * Get a marker for the current netisr (netisr0). |
| 725 | * |
| 726 | * It is possible that the multicast address deletion blocks, |
| 727 | * which could cause temporary token releasing. So we use |
| 728 | * inpcb marker here to get a coherent view of the inpcb list. |
| 729 | * |
| 730 | * While, on the other hand, moptions are only added and deleted |
| 731 | * in netisr0, so we would not see staled moption or miss moption |
| 732 | * even if the token was released due to the blocking multicast |
| 733 | * address deletion. |
| 734 | */ |
| 735 | marker = in_pcbmarker(mycpuid); |
| 736 | |
| 737 | GET_PCBINFO_TOKEN(pcbinfo); |
| 738 | |
| 739 | LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); |
| 740 | while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) { |
| 741 | LIST_REMOVE(marker, inp_list); |
| 742 | LIST_INSERT_AFTER(in6p, marker, inp_list); |
| 743 | |
| 744 | if (in6p->in6p_flags & INP_PLACEMARKER) |
| 745 | continue; |
| 746 | im6o = in6p->in6p_moptions; |
| 747 | if (INP_ISIPV6(in6p) && im6o) { |
| 748 | /* |
| 749 | * Unselect the outgoing interface if it is being |
| 750 | * detached. |
| 751 | */ |
| 752 | if (im6o->im6o_multicast_ifp == ifp) |
| 753 | im6o->im6o_multicast_ifp = NULL; |
| 754 | |
| 755 | /* |
| 756 | * Drop multicast group membership if we joined |
| 757 | * through the interface being detached. |
| 758 | * XXX controversial - is it really legal for kernel |
| 759 | * to force this? |
| 760 | */ |
| 761 | for (imm = im6o->im6o_memberships.lh_first; |
| 762 | imm != NULL; imm = nimm) { |
| 763 | nimm = imm->i6mm_chain.le_next; |
| 764 | if (imm->i6mm_maddr->in6m_ifp == ifp) { |
| 765 | LIST_REMOVE(imm, i6mm_chain); |
| 766 | in6_delmulti(imm->i6mm_maddr); |
| 767 | kfree(imm, M_IPMADDR); |
| 768 | } |
| 769 | } |
| 770 | } |
| 771 | } |
| 772 | LIST_REMOVE(marker, inp_list); |
| 773 | |
| 774 | REL_PCBINFO_TOKEN(pcbinfo); |
| 775 | } |
| 776 | |
| 777 | /* |
| 778 | * Check for alternatives when higher level complains |
| 779 | * about service problems. For now, invalidate cached |
| 780 | * routing information. If the route was created dynamically |
| 781 | * (by a redirect), time to try a default gateway again. |
| 782 | */ |
| 783 | void |
| 784 | in6_losing(struct inpcb *in6p) |
| 785 | { |
| 786 | struct rtentry *rt; |
| 787 | struct rt_addrinfo info; |
| 788 | |
| 789 | if ((rt = in6p->in6p_route.ro_rt) != NULL) { |
| 790 | bzero((caddr_t)&info, sizeof(info)); |
| 791 | info.rti_flags = rt->rt_flags; |
| 792 | info.rti_info[RTAX_DST] = rt_key(rt); |
| 793 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
| 794 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
| 795 | rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); |
| 796 | if (rt->rt_flags & RTF_DYNAMIC) { |
| 797 | rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, |
| 798 | rt_mask(rt), rt->rt_flags, NULL); |
| 799 | } |
| 800 | in6p->in6p_route.ro_rt = NULL; |
| 801 | rtfree(rt); |
| 802 | /* |
| 803 | * A new route can be allocated |
| 804 | * the next time output is attempted. |
| 805 | */ |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | /* |
| 810 | * After a routing change, flush old routing |
| 811 | * and allocate a (hopefully) better one. |
| 812 | */ |
| 813 | void |
| 814 | in6_rtchange(struct inpcb *inp, int error) |
| 815 | { |
| 816 | if (inp->in6p_route.ro_rt) { |
| 817 | rtfree(inp->in6p_route.ro_rt); |
| 818 | inp->in6p_route.ro_rt = 0; |
| 819 | /* |
| 820 | * A new route can be allocated the next time |
| 821 | * output is attempted. |
| 822 | */ |
| 823 | } |
| 824 | } |
| 825 | |
| 826 | /* |
| 827 | * Lookup PCB in hash list. |
| 828 | */ |
| 829 | struct inpcb * |
| 830 | in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, |
| 831 | u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, |
| 832 | int wildcard, struct ifnet *ifp) |
| 833 | { |
| 834 | struct inpcbhead *head; |
| 835 | struct inpcb *inp; |
| 836 | struct inpcb *jinp = NULL; |
| 837 | u_short fport = fport_arg, lport = lport_arg; |
| 838 | int faith; |
| 839 | |
| 840 | if (faithprefix_p != NULL) |
| 841 | faith = (*faithprefix_p)(laddr); |
| 842 | else |
| 843 | faith = 0; |
| 844 | |
| 845 | /* |
| 846 | * First look for an exact match. |
| 847 | */ |
| 848 | head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */, |
| 849 | fport, |
| 850 | laddr->s6_addr32[3], /* XXX JH */ |
| 851 | lport, |
| 852 | pcbinfo->hashmask)]; |
| 853 | LIST_FOREACH(inp, head, inp_hash) { |
| 854 | if (!INP_ISIPV6(inp)) |
| 855 | continue; |
| 856 | if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && |
| 857 | IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && |
| 858 | inp->inp_fport == fport && |
| 859 | inp->inp_lport == lport) { |
| 860 | /* |
| 861 | * Found. |
| 862 | */ |
| 863 | if (inp->inp_socket == NULL || |
| 864 | inp->inp_socket->so_cred->cr_prison == NULL) { |
| 865 | return (inp); |
| 866 | } else { |
| 867 | if (jinp == NULL) |
| 868 | jinp = inp; |
| 869 | } |
| 870 | } |
| 871 | } |
| 872 | if (jinp != NULL) |
| 873 | return(jinp); |
| 874 | |
| 875 | if (wildcard) { |
| 876 | struct inpcontainerhead *chead; |
| 877 | struct inpcontainer *ic; |
| 878 | struct inpcb *local_wild = NULL; |
| 879 | struct inpcb *jinp_wild = NULL; |
| 880 | struct sockaddr_in6 jsin6; |
| 881 | struct ucred *cred; |
| 882 | |
| 883 | /* |
| 884 | * Order of socket selection: |
| 885 | * 1. non-jailed, non-wild. |
| 886 | * 2. non-jailed, wild. |
| 887 | * 3. jailed, non-wild. |
| 888 | * 4. jailed, wild. |
| 889 | */ |
| 890 | jsin6.sin6_family = AF_INET6; |
| 891 | chead = &pcbinfo->wildcardhashbase[INP_PCBWILDCARDHASH(lport, |
| 892 | pcbinfo->wildcardhashmask)]; |
| 893 | |
| 894 | GET_PCBINFO_TOKEN(pcbinfo); |
| 895 | LIST_FOREACH(ic, chead, ic_list) { |
| 896 | inp = ic->ic_inp; |
| 897 | if (inp->inp_flags & INP_PLACEMARKER) |
| 898 | continue; |
| 899 | |
| 900 | if (!INP_ISIPV6(inp)) |
| 901 | continue; |
| 902 | if (inp->inp_socket != NULL) |
| 903 | cred = inp->inp_socket->so_cred; |
| 904 | else |
| 905 | cred = NULL; |
| 906 | |
| 907 | if (cred != NULL && jailed(cred)) { |
| 908 | if (jinp != NULL) { |
| 909 | continue; |
| 910 | } else { |
| 911 | jsin6.sin6_addr = *laddr; |
| 912 | if (!jailed_ip(cred->cr_prison, |
| 913 | (struct sockaddr *)&jsin6)) |
| 914 | continue; |
| 915 | } |
| 916 | } |
| 917 | if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && |
| 918 | inp->inp_lport == lport) { |
| 919 | if (faith && (inp->inp_flags & INP_FAITH) == 0) |
| 920 | continue; |
| 921 | if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, |
| 922 | laddr)) { |
| 923 | if (cred != NULL && jailed(cred)) { |
| 924 | jinp = inp; |
| 925 | } else { |
| 926 | REL_PCBINFO_TOKEN(pcbinfo); |
| 927 | return (inp); |
| 928 | } |
| 929 | } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { |
| 930 | if (cred != NULL && jailed(cred)) |
| 931 | jinp_wild = inp; |
| 932 | else |
| 933 | local_wild = inp; |
| 934 | } |
| 935 | } |
| 936 | } |
| 937 | REL_PCBINFO_TOKEN(pcbinfo); |
| 938 | |
| 939 | if (local_wild != NULL) |
| 940 | return (local_wild); |
| 941 | if (jinp != NULL) |
| 942 | return (jinp); |
| 943 | return (jinp_wild); |
| 944 | } |
| 945 | |
| 946 | /* |
| 947 | * Not found. |
| 948 | */ |
| 949 | return (NULL); |
| 950 | } |
| 951 | |
| 952 | void |
| 953 | init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) |
| 954 | { |
| 955 | struct ip6_hdr *ip; |
| 956 | |
| 957 | ip = mtod(m, struct ip6_hdr *); |
| 958 | bzero(sin6, sizeof(*sin6)); |
| 959 | sin6->sin6_len = sizeof(*sin6); |
| 960 | sin6->sin6_family = AF_INET6; |
| 961 | sin6->sin6_addr = ip->ip6_src; |
| 962 | if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) |
| 963 | sin6->sin6_addr.s6_addr16[1] = 0; |
| 964 | sin6->sin6_scope_id = |
| 965 | (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) |
| 966 | ? m->m_pkthdr.rcvif->if_index : 0; |
| 967 | |
| 968 | return; |
| 969 | } |
| 970 | |
| 971 | void |
| 972 | in6_savefaddr(struct socket *so, const struct sockaddr *faddr) |
| 973 | { |
| 974 | struct sockaddr_in6 *sin6; |
| 975 | |
| 976 | KASSERT(faddr->sa_family == AF_INET6, |
| 977 | ("not AF_INET6 faddr %d", faddr->sa_family)); |
| 978 | |
| 979 | sin6 = kmalloc(sizeof(*sin6), M_SONAME, M_WAITOK | M_ZERO); |
| 980 | sin6->sin6_family = AF_INET6; |
| 981 | sin6->sin6_len = sizeof(*sin6); |
| 982 | |
| 983 | sin6->sin6_port = ((const struct sockaddr_in6 *)faddr)->sin6_port; |
| 984 | sin6->sin6_addr = ((const struct sockaddr_in6 *)faddr)->sin6_addr; |
| 985 | |
| 986 | if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) |
| 987 | sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); |
| 988 | else |
| 989 | sin6->sin6_scope_id = 0; /*XXX*/ |
| 990 | if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) |
| 991 | sin6->sin6_addr.s6_addr16[1] = 0; |
| 992 | |
| 993 | so->so_faddr = (struct sockaddr *)sin6; |
| 994 | } |