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. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by the University of
49 * California, Berkeley and its contributors.
50 * 4. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 *
66 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
67 */
68
69#include "opt_inet.h"
70#include "opt_inet6.h"
71#include "opt_ipsec.h"
72
73#include <sys/param.h>
74#include <sys/systm.h>
75#include <sys/malloc.h>
76#include <sys/mbuf.h>
77#include <sys/domain.h>
78#include <sys/protosw.h>
79#include <sys/socket.h>
80#include <sys/socketvar.h>
81#include <sys/sockio.h>
82#include <sys/errno.h>
83#include <sys/time.h>
84#include <sys/proc.h>
85#include <sys/jail.h>
86
87#include <vm/vm_zone.h>
88
89#include <net/if.h>
90#include <net/if_types.h>
91#include <net/route.h>
92
93#include <netinet/in.h>
94#include <netinet/in_var.h>
95#include <netinet/in_systm.h>
96#include <netinet/ip6.h>
97#include <netinet/ip_var.h>
98#include <netinet6/ip6_var.h>
99#include <netinet6/nd6.h>
100#include <netinet/in_pcb.h>
101#include <netinet6/in6_pcb.h>
102
| 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. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by the University of
49 * California, Berkeley and its contributors.
50 * 4. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 *
66 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
67 */
68
69#include "opt_inet.h"
70#include "opt_inet6.h"
71#include "opt_ipsec.h"
72
73#include <sys/param.h>
74#include <sys/systm.h>
75#include <sys/malloc.h>
76#include <sys/mbuf.h>
77#include <sys/domain.h>
78#include <sys/protosw.h>
79#include <sys/socket.h>
80#include <sys/socketvar.h>
81#include <sys/sockio.h>
82#include <sys/errno.h>
83#include <sys/time.h>
84#include <sys/proc.h>
85#include <sys/jail.h>
86
87#include <vm/vm_zone.h>
88
89#include <net/if.h>
90#include <net/if_types.h>
91#include <net/route.h>
92
93#include <netinet/in.h>
94#include <netinet/in_var.h>
95#include <netinet/in_systm.h>
96#include <netinet/ip6.h>
97#include <netinet/ip_var.h>
98#include <netinet6/ip6_var.h>
99#include <netinet6/nd6.h>
100#include <netinet/in_pcb.h>
101#include <netinet6/in6_pcb.h>
102
|
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 <netkey/key.h>
118#endif /* IPSEC */
119
120struct in6_addr zeroin6_addr;
121
122int
123in6_pcbbind(inp, nam, td)
124 register struct inpcb *inp;
125 struct sockaddr *nam;
126 struct thread *td;
127{
128 struct socket *so = inp->inp_socket;
129 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
130 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
131 u_short lport = 0;
132 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
133
134 if (!in6_ifaddr) /* XXX broken! */
135 return (EADDRNOTAVAIL);
136 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
137 return(EINVAL);
138 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
139 wild = 1;
140 if (nam) {
141 sin6 = (struct sockaddr_in6 *)nam;
142 if (nam->sa_len != sizeof(*sin6))
143 return(EINVAL);
144 /*
145 * family check.
146 */
147 if (nam->sa_family != AF_INET6)
148 return(EAFNOSUPPORT);
149
150 /* KAME hack: embed scopeid */
151 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
152 return EINVAL;
153 /* this must be cleared for ifa_ifwithaddr() */
154 sin6->sin6_scope_id = 0;
155
156 lport = sin6->sin6_port;
157 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
158 /*
159 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
160 * allow compepte duplication of binding if
161 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
162 * and a multicast address is bound on both
163 * new and duplicated sockets.
164 */
165 if (so->so_options & SO_REUSEADDR)
166 reuseport = SO_REUSEADDR|SO_REUSEPORT;
167 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
168 struct ifaddr *ia = NULL;
169
170 sin6->sin6_port = 0; /* yech... */
171 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
172 return(EADDRNOTAVAIL);
173
174 /*
175 * XXX: bind to an anycast address might accidentally
176 * cause sending a packet with anycast source address.
177 * We should allow to bind to a deprecated address, since
178 * the application dare to use it.
179 */
180 if (ia &&
181 ((struct in6_ifaddr *)ia)->ia6_flags &
182 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
183 return(EADDRNOTAVAIL);
184 }
185 }
186 if (lport) {
187 struct inpcb *t;
188
189 /* GROSS */
190 if (ntohs(lport) < IPV6PORT_RESERVED && td &&
191 suser_xxx(0, td->td_proc, PRISON_ROOT))
192 return(EACCES);
193 if (so->so_cred->cr_uid != 0 &&
194 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
195 t = in6_pcblookup_local(pcbinfo,
196 &sin6->sin6_addr, lport,
197 INPLOOKUP_WILDCARD);
198 if (t &&
199 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
200 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
201 (t->inp_socket->so_options &
202 SO_REUSEPORT) == 0) &&
203 (so->so_cred->cr_uid !=
204 t->inp_socket->so_cred->cr_uid))
205 return (EADDRINUSE);
206 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
207 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
208 struct sockaddr_in sin;
209
210 in6_sin6_2_sin(&sin, sin6);
211 t = in_pcblookup_local(pcbinfo,
212 sin.sin_addr, lport,
213 INPLOOKUP_WILDCARD);
214 if (t &&
215 (so->so_cred->cr_uid !=
216 t->inp_socket->so_cred->cr_uid) &&
217 (ntohl(t->inp_laddr.s_addr) !=
218 INADDR_ANY ||
219 INP_SOCKAF(so) ==
220 INP_SOCKAF(t->inp_socket)))
221 return (EADDRINUSE);
222 }
223 }
224 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
225 lport, wild);
226 if (t && (reuseport & t->inp_socket->so_options) == 0)
227 return(EADDRINUSE);
228 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
229 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
230 struct sockaddr_in sin;
231
232 in6_sin6_2_sin(&sin, sin6);
233 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
234 lport, wild);
235 if (t &&
236 (reuseport & t->inp_socket->so_options)
237 == 0 &&
238 (ntohl(t->inp_laddr.s_addr)
239 != INADDR_ANY ||
240 INP_SOCKAF(so) ==
241 INP_SOCKAF(t->inp_socket)))
242 return (EADDRINUSE);
243 }
244 }
245 inp->in6p_laddr = sin6->sin6_addr;
246 }
247 if (lport == 0) {
248 int e;
249 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, td)) != 0)
250 return(e);
251 }
252 else {
253 inp->inp_lport = lport;
254 if (in_pcbinshash(inp) != 0) {
255 inp->in6p_laddr = in6addr_any;
256 inp->inp_lport = 0;
257 return (EAGAIN);
258 }
259 }
260 return(0);
261}
262
263/*
264 * Transform old in6_pcbconnect() into an inner subroutine for new
265 * in6_pcbconnect(): Do some validity-checking on the remote
266 * address (in mbuf 'nam') and then determine local host address
267 * (i.e., which interface) to use to access that remote host.
268 *
269 * This preserves definition of in6_pcbconnect(), while supporting a
270 * slightly different version for T/TCP. (This is more than
271 * a bit of a kludge, but cleaning up the internal interfaces would
272 * have forced minor changes in every protocol).
273 */
274
275int
276in6_pcbladdr(inp, nam, plocal_addr6)
277 register struct inpcb *inp;
278 struct sockaddr *nam;
279 struct in6_addr **plocal_addr6;
280{
281 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
282 struct ifnet *ifp = NULL;
283 int error = 0;
284
285 if (nam->sa_len != sizeof (*sin6))
286 return (EINVAL);
287 if (sin6->sin6_family != AF_INET6)
288 return (EAFNOSUPPORT);
289 if (sin6->sin6_port == 0)
290 return (EADDRNOTAVAIL);
291
292 /* KAME hack: embed scopeid */
293 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
294 return EINVAL;
295
296 if (in6_ifaddr) {
297 /*
298 * If the destination address is UNSPECIFIED addr,
299 * use the loopback addr, e.g ::1.
300 */
301 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
302 sin6->sin6_addr = in6addr_loopback;
303 }
304 {
305 /*
306 * XXX: in6_selectsrc might replace the bound local address
307 * with the address specified by setsockopt(IPV6_PKTINFO).
308 * Is it the intended behavior?
309 */
310 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
311 inp->in6p_moptions,
312 &inp->in6p_route,
313 &inp->in6p_laddr, &error);
314 if (*plocal_addr6 == 0) {
315 if (error == 0)
316 error = EADDRNOTAVAIL;
317 return(error);
318 }
319 /*
320 * Don't do pcblookup call here; return interface in
321 * plocal_addr6
322 * and exit to caller, that will do the lookup.
323 */
324 }
325
326 if (inp->in6p_route.ro_rt)
327 ifp = inp->in6p_route.ro_rt->rt_ifp;
328
329 return(0);
330}
331
332/*
333 * Outer subroutine:
334 * Connect from a socket to a specified address.
335 * Both address and port must be specified in argument sin.
336 * If don't have a local address for this socket yet,
337 * then pick one.
338 */
339int
340in6_pcbconnect(inp, nam, td)
341 register struct inpcb *inp;
342 struct sockaddr *nam;
343 struct thread *td;
344{
345 struct in6_addr *addr6;
346 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
347 int error;
348
349 /*
350 * Call inner routine, to assign local interface address.
351 */
352 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
353 return(error);
354
355 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
356 sin6->sin6_port,
357 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
358 ? addr6 : &inp->in6p_laddr,
359 inp->inp_lport, 0, NULL) != NULL) {
360 return (EADDRINUSE);
361 }
362 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
363 if (inp->inp_lport == 0) {
364 error = in6_pcbbind(inp, (struct sockaddr *)0, td);
365 if (error)
366 return (error);
367 }
368 inp->in6p_laddr = *addr6;
369 }
370 inp->in6p_faddr = sin6->sin6_addr;
371 inp->inp_fport = sin6->sin6_port;
372 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
373 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
374 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL)
375 inp->in6p_flowinfo |=
376 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
377
378 in_pcbrehash(inp);
379 return (0);
380}
381
382#if 0
383/*
384 * Return an IPv6 address, which is the most appropriate for given
385 * destination and user specified options.
386 * If necessary, this function lookups the routing table and return
387 * an entry to the caller for later use.
388 */
389struct in6_addr *
390in6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp)
391 struct sockaddr_in6 *dstsock;
392 struct ip6_pktopts *opts;
393 struct ip6_moptions *mopts;
394 struct route_in6 *ro;
395 struct in6_addr *laddr;
396 int *errorp;
397{
398 struct in6_addr *dst;
399 struct in6_ifaddr *ia6 = 0;
400 struct in6_pktinfo *pi = NULL;
401
402 dst = &dstsock->sin6_addr;
403 *errorp = 0;
404
405 /*
406 * If the source address is explicitly specified by the caller,
407 * use it.
408 */
409 if (opts && (pi = opts->ip6po_pktinfo) &&
410 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr))
411 return(&pi->ipi6_addr);
412
413 /*
414 * If the source address is not specified but the socket(if any)
415 * is already bound, use the bound address.
416 */
417 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr))
418 return(laddr);
419
420 /*
421 * If the caller doesn't specify the source address but
422 * the outgoing interface, use an address associated with
423 * the interface.
424 */
425 if (pi && pi->ipi6_ifindex) {
426 /* XXX boundary check is assumed to be already done. */
427 ia6 = in6_ifawithscope(ifnet_byindex(pi->ipi6_ifindex), dst);
428 if (ia6 == 0) {
429 *errorp = EADDRNOTAVAIL;
430 return(0);
431 }
432 return(&satosin6(&ia6->ia_addr)->sin6_addr);
433 }
434
435 /*
436 * If the destination address is a link-local unicast address or
437 * a multicast address, and if the outgoing interface is specified
438 * by the sin6_scope_id filed, use an address associated with the
439 * interface.
440 * XXX: We're now trying to define more specific semantics of
441 * sin6_scope_id field, so this part will be rewritten in
442 * the near future.
443 */
444 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
445 dstsock->sin6_scope_id) {
446 /*
447 * I'm not sure if boundary check for scope_id is done
448 * somewhere...
449 */
450 if (dstsock->sin6_scope_id < 0 ||
451 if_index < dstsock->sin6_scope_id) {
452 *errorp = ENXIO; /* XXX: better error? */
453 return(0);
454 }
455 ia6 = in6_ifawithscope(ifnet_byindex(dstsock->sin6_scope_id),
456 dst);
457 if (ia6 == 0) {
458 *errorp = EADDRNOTAVAIL;
459 return(0);
460 }
461 return(&satosin6(&ia6->ia_addr)->sin6_addr);
462 }
463
464 /*
465 * If the destination address is a multicast address and
466 * the outgoing interface for the address is specified
467 * by the caller, use an address associated with the interface.
468 * There is a sanity check here; if the destination has node-local
469 * scope, the outgoing interfacde should be a loopback address.
470 * Even if the outgoing interface is not specified, we also
471 * choose a loopback interface as the outgoing interface.
472 */
473 if (IN6_IS_ADDR_MULTICAST(dst)) {
474 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
475
476 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
477 ifp = &loif[0];
478 }
479
480 if (ifp) {
481 ia6 = in6_ifawithscope(ifp, dst);
482 if (ia6 == 0) {
483 *errorp = EADDRNOTAVAIL;
484 return(0);
485 }
486 return(&ia6->ia_addr.sin6_addr);
487 }
488 }
489
490 /*
491 * If the next hop address for the packet is specified
492 * by caller, use an address associated with the route
493 * to the next hop.
494 */
495 {
496 struct sockaddr_in6 *sin6_next;
497 struct rtentry *rt;
498
499 if (opts && opts->ip6po_nexthop) {
500 sin6_next = satosin6(opts->ip6po_nexthop);
501 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
502 if (rt) {
503 ia6 = in6_ifawithscope(rt->rt_ifp, dst);
504 if (ia6 == 0)
505 ia6 = ifatoia6(rt->rt_ifa);
506 }
507 if (ia6 == 0) {
508 *errorp = EADDRNOTAVAIL;
509 return(0);
510 }
511 return(&satosin6(&ia6->ia_addr)->sin6_addr);
512 }
513 }
514
515 /*
516 * If route is known or can be allocated now,
517 * our src addr is taken from the i/f, else punt.
518 */
519 if (ro) {
520 if (ro->ro_rt &&
521 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
522 RTFREE(ro->ro_rt);
523 ro->ro_rt = (struct rtentry *)0;
524 }
525 if (ro->ro_rt == (struct rtentry *)0 ||
526 ro->ro_rt->rt_ifp == (struct ifnet *)0) {
527 struct sockaddr_in6 *dst6;
528
529 /* No route yet, so try to acquire one */
530 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
531 dst6 = (struct sockaddr_in6 *)&ro->ro_dst;
532 dst6->sin6_family = AF_INET6;
533 dst6->sin6_len = sizeof(struct sockaddr_in6);
534 dst6->sin6_addr = *dst;
535 if (IN6_IS_ADDR_MULTICAST(dst)) {
536 ro->ro_rt = rtalloc1(&((struct route *)ro)
537 ->ro_dst, 0, 0UL);
538 } else {
539 rtalloc((struct route *)ro);
540 }
541 }
542
543 /*
544 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
545 * the address. But we don't know why it does so.
546 * It is necessary to ensure the scope even for lo0
547 * so doesn't check out IFF_LOOPBACK.
548 */
549
550 if (ro->ro_rt) {
551 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
552 if (ia6 == 0) /* xxx scope error ?*/
553 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
554 }
555 if (ia6 == 0) {
556 *errorp = EHOSTUNREACH; /* no route */
557 return(0);
558 }
559 return(&satosin6(&ia6->ia_addr)->sin6_addr);
560 }
561
562 *errorp = EADDRNOTAVAIL;
563 return(0);
564}
565
566/*
567 * Default hop limit selection. The precedence is as follows:
568 * 1. Hoplimit valued specified via ioctl.
569 * 2. (If the outgoing interface is detected) the current
570 * hop limit of the interface specified by router advertisement.
571 * 3. The system default hoplimit.
572*/
573int
574in6_selecthlim(in6p, ifp)
575 struct in6pcb *in6p;
576 struct ifnet *ifp;
577{
578 if (in6p && in6p->in6p_hops >= 0)
579 return(in6p->in6p_hops);
580 else if (ifp)
581 return(nd_ifinfo[ifp->if_index].chlim);
582 else
583 return(ip6_defhlim);
584}
585#endif
586
587void
588in6_pcbdisconnect(inp)
589 struct inpcb *inp;
590{
591 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
592 inp->inp_fport = 0;
593 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
594 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
595 in_pcbrehash(inp);
596 if (inp->inp_socket->so_state & SS_NOFDREF)
597 in6_pcbdetach(inp);
598}
599
600void
601in6_pcbdetach(inp)
602 struct inpcb *inp;
603{
604 struct socket *so = inp->inp_socket;
605 struct inpcbinfo *ipi = inp->inp_pcbinfo;
606
607#ifdef IPSEC
608 if (inp->in6p_sp != NULL)
609 ipsec6_delete_pcbpolicy(inp);
610#endif /* IPSEC */
611 inp->inp_gencnt = ++ipi->ipi_gencnt;
612 in_pcbremlists(inp);
613 sotoinpcb(so) = 0;
614 sofree(so);
615
616 if (inp->in6p_options)
617 m_freem(inp->in6p_options);
618 ip6_freepcbopts(inp->in6p_outputopts);
619 ip6_freemoptions(inp->in6p_moptions);
620 if (inp->in6p_route.ro_rt)
621 rtfree(inp->in6p_route.ro_rt);
622 /* Check and free IPv4 related resources in case of mapped addr */
623 if (inp->inp_options)
624 (void)m_free(inp->inp_options);
625 ip_freemoptions(inp->inp_moptions);
626
627 inp->inp_vflag = 0;
628 zfree(ipi->ipi_zone, inp);
629}
630
631/*
632 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
633 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
634 * in struct pr_usrreqs, so that protocols can just reference then directly
635 * without the need for a wrapper function. The socket must have a valid
636 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
637 * except through a kernel programming error, so it is acceptable to panic
638 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
639 * because there actually /is/ a programming error somewhere... XXX)
640 */
641int
642in6_setsockaddr(so, nam)
643 struct socket *so;
644 struct sockaddr **nam;
645{
646 int s;
647 register struct inpcb *inp;
648 register struct sockaddr_in6 *sin6;
649
650 /*
651 * Do the malloc first in case it blocks.
652 */
653 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
654 bzero(sin6, sizeof *sin6);
655 sin6->sin6_family = AF_INET6;
656 sin6->sin6_len = sizeof(*sin6);
657
658 s = splnet();
659 inp = sotoinpcb(so);
660 if (!inp) {
661 splx(s);
662 free(sin6, M_SONAME);
663 return EINVAL;
664 }
665 sin6->sin6_port = inp->inp_lport;
666 sin6->sin6_addr = inp->in6p_laddr;
667 splx(s);
668 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
669 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
670 else
671 sin6->sin6_scope_id = 0; /*XXX*/
672 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
673 sin6->sin6_addr.s6_addr16[1] = 0;
674
675 *nam = (struct sockaddr *)sin6;
676 return 0;
677}
678
679int
680in6_setpeeraddr(so, nam)
681 struct socket *so;
682 struct sockaddr **nam;
683{
684 int s;
685 struct inpcb *inp;
686 register struct sockaddr_in6 *sin6;
687
688 /*
689 * Do the malloc first in case it blocks.
690 */
691 MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
692 bzero((caddr_t)sin6, sizeof (*sin6));
693 sin6->sin6_family = AF_INET6;
694 sin6->sin6_len = sizeof(struct sockaddr_in6);
695
696 s = splnet();
697 inp = sotoinpcb(so);
698 if (!inp) {
699 splx(s);
700 free(sin6, M_SONAME);
701 return EINVAL;
702 }
703 sin6->sin6_port = inp->inp_fport;
704 sin6->sin6_addr = inp->in6p_faddr;
705 splx(s);
706 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
707 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
708 else
709 sin6->sin6_scope_id = 0; /*XXX*/
710 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
711 sin6->sin6_addr.s6_addr16[1] = 0;
712
713 *nam = (struct sockaddr *)sin6;
714 return 0;
715}
716
717int
718in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
719{
720 struct inpcb *inp = sotoinpcb(so);
721 int error;
722
723 if (inp == NULL)
724 return EINVAL;
725 if (inp->inp_vflag & INP_IPV4) {
726 error = in_setsockaddr(so, nam);
727 if (error == 0)
728 in6_sin_2_v4mapsin6_in_sock(nam);
729 } else
730 error = in6_setsockaddr(so, nam);
731
732 return error;
733}
734
735int
736in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
737{
738 struct inpcb *inp = sotoinpcb(so);
739 int error;
740
741 if (inp == NULL)
742 return EINVAL;
743 if (inp->inp_vflag & INP_IPV4) {
744 error = in_setpeeraddr(so, nam);
745 if (error == 0)
746 in6_sin_2_v4mapsin6_in_sock(nam);
747 } else
748 error = in6_setpeeraddr(so, nam);
749
750 return error;
751}
752
753/*
754 * Pass some notification to all connections of a protocol
755 * associated with address dst. The local address and/or port numbers
756 * may be specified to limit the search. The "usual action" will be
757 * taken, depending on the ctlinput cmd. The caller must filter any
758 * cmds that are uninteresting (e.g., no error in the map).
759 * Call the protocol specific routine (if any) to report
760 * any errors for each matching socket.
761 *
762 * Must be called at splnet.
763 */
764void
765in6_pcbnotify(head, dst, fport_arg, src, lport_arg, cmd, notify)
766 struct inpcbhead *head;
767 struct sockaddr *dst, *src;
768 u_int fport_arg, lport_arg;
769 int cmd;
770 void (*notify) __P((struct inpcb *, int));
771{
772 struct inpcb *inp, *ninp;
773 struct sockaddr_in6 sa6_src, *sa6_dst;
774 u_short fport = fport_arg, lport = lport_arg;
775 u_int32_t flowinfo;
776 int errno, s;
777
778 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6)
779 return;
780
781 sa6_dst = (struct sockaddr_in6 *)dst;
782 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
783 return;
784
785 /*
786 * note that src can be NULL when we get notify by local fragmentation.
787 */
788 sa6_src = (src == NULL) ? sa6_any : *(struct sockaddr_in6 *)src;
789 flowinfo = sa6_src.sin6_flowinfo;
790
791 /*
792 * Redirects go to all references to the destination,
793 * and use in6_rtchange to invalidate the route cache.
794 * Dead host indications: also use in6_rtchange to invalidate
795 * the cache, and deliver the error to all the sockets.
796 * Otherwise, if we have knowledge of the local port and address,
797 * deliver only to that socket.
798 */
799 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
800 fport = 0;
801 lport = 0;
802 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
803
804 if (cmd != PRC_HOSTDEAD)
805 notify = in6_rtchange;
806 }
807 errno = inet6ctlerrmap[cmd];
808 s = splnet();
809 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
810 ninp = LIST_NEXT(inp, inp_list);
811
812 if ((inp->inp_vflag & INP_IPV6) == 0)
813 continue;
814
815 /*
816 * Detect if we should notify the error. If no source and
817 * destination ports are specifed, but non-zero flowinfo and
818 * local address match, notify the error. This is the case
819 * when the error is delivered with an encrypted buffer
820 * by ESP. Otherwise, just compare addresses and ports
821 * as usual.
822 */
823 if (lport == 0 && fport == 0 && flowinfo &&
824 inp->inp_socket != NULL &&
825 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
826 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
827 goto do_notify;
828 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
829 &sa6_dst->sin6_addr) ||
830 inp->inp_socket == 0 ||
831 (lport && inp->inp_lport != lport) ||
832 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
833 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
834 &sa6_src.sin6_addr)) ||
835 (fport && inp->inp_fport != fport))
836 continue;
837
838 do_notify:
839 if (notify)
840 (*notify)(inp, errno);
841 }
842 splx(s);
843}
844
845/*
846 * Lookup a PCB based on the local address and port.
847 */
848struct inpcb *
849in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
850 struct inpcbinfo *pcbinfo;
851 struct in6_addr *laddr;
852 u_int lport_arg;
853 int wild_okay;
854{
855 register struct inpcb *inp;
856 int matchwild = 3, wildcard;
857 u_short lport = lport_arg;
858
859 if (!wild_okay) {
860 struct inpcbhead *head;
861 /*
862 * Look for an unconnected (wildcard foreign addr) PCB that
863 * matches the local address and port we're looking for.
864 */
865 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
866 pcbinfo->hashmask)];
867 LIST_FOREACH(inp, head, inp_hash) {
868 if ((inp->inp_vflag & INP_IPV6) == 0)
869 continue;
870 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
871 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
872 inp->inp_lport == lport) {
873 /*
874 * Found.
875 */
876 return (inp);
877 }
878 }
879 /*
880 * Not found.
881 */
882 return (NULL);
883 } else {
884 struct inpcbporthead *porthash;
885 struct inpcbport *phd;
886 struct inpcb *match = NULL;
887 /*
888 * Best fit PCB lookup.
889 *
890 * First see if this local port is in use by looking on the
891 * port hash list.
892 */
893 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
894 pcbinfo->porthashmask)];
895 LIST_FOREACH(phd, porthash, phd_hash) {
896 if (phd->phd_port == lport)
897 break;
898 }
899 if (phd != NULL) {
900 /*
901 * Port is in use by one or more PCBs. Look for best
902 * fit.
903 */
904 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
905 wildcard = 0;
906 if ((inp->inp_vflag & INP_IPV6) == 0)
907 continue;
908 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
909 wildcard++;
910 if (!IN6_IS_ADDR_UNSPECIFIED(
911 &inp->in6p_laddr)) {
912 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
913 wildcard++;
914 else if (!IN6_ARE_ADDR_EQUAL(
915 &inp->in6p_laddr, laddr))
916 continue;
917 } else {
918 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
919 wildcard++;
920 }
921 if (wildcard < matchwild) {
922 match = inp;
923 matchwild = wildcard;
924 if (matchwild == 0) {
925 break;
926 }
927 }
928 }
929 }
930 return (match);
931 }
932}
933
934void
935in6_pcbpurgeif0(head, ifp)
936 struct in6pcb *head;
937 struct ifnet *ifp;
938{
939 struct in6pcb *in6p;
940 struct ip6_moptions *im6o;
941 struct in6_multi_mship *imm, *nimm;
942
943 for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) {
944 im6o = in6p->in6p_moptions;
945 if ((in6p->inp_vflag & INP_IPV6) &&
946 im6o) {
947 /*
948 * Unselect the outgoing interface if it is being
949 * detached.
950 */
951 if (im6o->im6o_multicast_ifp == ifp)
952 im6o->im6o_multicast_ifp = NULL;
953
954 /*
955 * Drop multicast group membership if we joined
956 * through the interface being detached.
957 * XXX controversial - is it really legal for kernel
958 * to force this?
959 */
960 for (imm = im6o->im6o_memberships.lh_first;
961 imm != NULL; imm = nimm) {
962 nimm = imm->i6mm_chain.le_next;
963 if (imm->i6mm_maddr->in6m_ifp == ifp) {
964 LIST_REMOVE(imm, i6mm_chain);
965 in6_delmulti(imm->i6mm_maddr);
966 free(imm, M_IPMADDR);
967 }
968 }
969 }
970 }
971}
972
973/*
974 * Check for alternatives when higher level complains
975 * about service problems. For now, invalidate cached
976 * routing information. If the route was created dynamically
977 * (by a redirect), time to try a default gateway again.
978 */
979void
980in6_losing(in6p)
981 struct inpcb *in6p;
982{
983 struct rtentry *rt;
984 struct rt_addrinfo info;
985
986 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
987 in6p->in6p_route.ro_rt = 0;
988 bzero((caddr_t)&info, sizeof(info));
989 info.rti_info[RTAX_DST] =
990 (struct sockaddr *)&in6p->in6p_route.ro_dst;
991 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
992 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
993 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
994 if (rt->rt_flags & RTF_DYNAMIC)
995 (void)rtrequest(RTM_DELETE, rt_key(rt),
996 rt->rt_gateway, rt_mask(rt), rt->rt_flags,
997 (struct rtentry **)0);
998 else
999 /*
1000 * A new route can be allocated
1001 * the next time output is attempted.
1002 */
1003 rtfree(rt);
1004 }
1005}
1006
1007/*
1008 * After a routing change, flush old routing
1009 * and allocate a (hopefully) better one.
1010 */
1011void
1012in6_rtchange(inp, errno)
1013 struct inpcb *inp;
1014 int errno;
1015{
1016 if (inp->in6p_route.ro_rt) {
1017 rtfree(inp->in6p_route.ro_rt);
1018 inp->in6p_route.ro_rt = 0;
1019 /*
1020 * A new route can be allocated the next time
1021 * output is attempted.
1022 */
1023 }
1024}
1025
1026/*
1027 * Lookup PCB in hash list.
1028 */
1029struct inpcb *
1030in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
1031 struct inpcbinfo *pcbinfo;
1032 struct in6_addr *faddr, *laddr;
1033 u_int fport_arg, lport_arg;
1034 int wildcard;
1035 struct ifnet *ifp;
1036{
1037 struct inpcbhead *head;
1038 register struct inpcb *inp;
1039 u_short fport = fport_arg, lport = lport_arg;
1040 int faith;
1041
| 103#ifdef IPSEC
104#include <netinet6/ipsec.h>
105#ifdef INET6
106#include <netinet6/ipsec6.h>
107#endif
108#include <netinet6/ah.h>
109#ifdef INET6
110#include <netinet6/ah6.h>
111#endif
112#include <netkey/key.h>
113#endif /* IPSEC */
114
115struct in6_addr zeroin6_addr;
116
117int
118in6_pcbbind(inp, nam, td)
119 register struct inpcb *inp;
120 struct sockaddr *nam;
121 struct thread *td;
122{
123 struct socket *so = inp->inp_socket;
124 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
125 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
126 u_short lport = 0;
127 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
128
129 if (!in6_ifaddr) /* XXX broken! */
130 return (EADDRNOTAVAIL);
131 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
132 return(EINVAL);
133 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
134 wild = 1;
135 if (nam) {
136 sin6 = (struct sockaddr_in6 *)nam;
137 if (nam->sa_len != sizeof(*sin6))
138 return(EINVAL);
139 /*
140 * family check.
141 */
142 if (nam->sa_family != AF_INET6)
143 return(EAFNOSUPPORT);
144
145 /* KAME hack: embed scopeid */
146 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
147 return EINVAL;
148 /* this must be cleared for ifa_ifwithaddr() */
149 sin6->sin6_scope_id = 0;
150
151 lport = sin6->sin6_port;
152 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
153 /*
154 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
155 * allow compepte duplication of binding if
156 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
157 * and a multicast address is bound on both
158 * new and duplicated sockets.
159 */
160 if (so->so_options & SO_REUSEADDR)
161 reuseport = SO_REUSEADDR|SO_REUSEPORT;
162 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
163 struct ifaddr *ia = NULL;
164
165 sin6->sin6_port = 0; /* yech... */
166 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
167 return(EADDRNOTAVAIL);
168
169 /*
170 * XXX: bind to an anycast address might accidentally
171 * cause sending a packet with anycast source address.
172 * We should allow to bind to a deprecated address, since
173 * the application dare to use it.
174 */
175 if (ia &&
176 ((struct in6_ifaddr *)ia)->ia6_flags &
177 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
178 return(EADDRNOTAVAIL);
179 }
180 }
181 if (lport) {
182 struct inpcb *t;
183
184 /* GROSS */
185 if (ntohs(lport) < IPV6PORT_RESERVED && td &&
186 suser_xxx(0, td->td_proc, PRISON_ROOT))
187 return(EACCES);
188 if (so->so_cred->cr_uid != 0 &&
189 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
190 t = in6_pcblookup_local(pcbinfo,
191 &sin6->sin6_addr, lport,
192 INPLOOKUP_WILDCARD);
193 if (t &&
194 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
195 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
196 (t->inp_socket->so_options &
197 SO_REUSEPORT) == 0) &&
198 (so->so_cred->cr_uid !=
199 t->inp_socket->so_cred->cr_uid))
200 return (EADDRINUSE);
201 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
202 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
203 struct sockaddr_in sin;
204
205 in6_sin6_2_sin(&sin, sin6);
206 t = in_pcblookup_local(pcbinfo,
207 sin.sin_addr, lport,
208 INPLOOKUP_WILDCARD);
209 if (t &&
210 (so->so_cred->cr_uid !=
211 t->inp_socket->so_cred->cr_uid) &&
212 (ntohl(t->inp_laddr.s_addr) !=
213 INADDR_ANY ||
214 INP_SOCKAF(so) ==
215 INP_SOCKAF(t->inp_socket)))
216 return (EADDRINUSE);
217 }
218 }
219 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
220 lport, wild);
221 if (t && (reuseport & t->inp_socket->so_options) == 0)
222 return(EADDRINUSE);
223 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
224 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
225 struct sockaddr_in sin;
226
227 in6_sin6_2_sin(&sin, sin6);
228 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
229 lport, wild);
230 if (t &&
231 (reuseport & t->inp_socket->so_options)
232 == 0 &&
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 inp->in6p_laddr = sin6->sin6_addr;
241 }
242 if (lport == 0) {
243 int e;
244 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, td)) != 0)
245 return(e);
246 }
247 else {
248 inp->inp_lport = lport;
249 if (in_pcbinshash(inp) != 0) {
250 inp->in6p_laddr = in6addr_any;
251 inp->inp_lport = 0;
252 return (EAGAIN);
253 }
254 }
255 return(0);
256}
257
258/*
259 * Transform old in6_pcbconnect() into an inner subroutine for new
260 * in6_pcbconnect(): Do some validity-checking on the remote
261 * address (in mbuf 'nam') and then determine local host address
262 * (i.e., which interface) to use to access that remote host.
263 *
264 * This preserves definition of in6_pcbconnect(), while supporting a
265 * slightly different version for T/TCP. (This is more than
266 * a bit of a kludge, but cleaning up the internal interfaces would
267 * have forced minor changes in every protocol).
268 */
269
270int
271in6_pcbladdr(inp, nam, plocal_addr6)
272 register struct inpcb *inp;
273 struct sockaddr *nam;
274 struct in6_addr **plocal_addr6;
275{
276 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
277 struct ifnet *ifp = NULL;
278 int error = 0;
279
280 if (nam->sa_len != sizeof (*sin6))
281 return (EINVAL);
282 if (sin6->sin6_family != AF_INET6)
283 return (EAFNOSUPPORT);
284 if (sin6->sin6_port == 0)
285 return (EADDRNOTAVAIL);
286
287 /* KAME hack: embed scopeid */
288 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
289 return EINVAL;
290
291 if (in6_ifaddr) {
292 /*
293 * If the destination address is UNSPECIFIED addr,
294 * use the loopback addr, e.g ::1.
295 */
296 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
297 sin6->sin6_addr = in6addr_loopback;
298 }
299 {
300 /*
301 * XXX: in6_selectsrc might replace the bound local address
302 * with the address specified by setsockopt(IPV6_PKTINFO).
303 * Is it the intended behavior?
304 */
305 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
306 inp->in6p_moptions,
307 &inp->in6p_route,
308 &inp->in6p_laddr, &error);
309 if (*plocal_addr6 == 0) {
310 if (error == 0)
311 error = EADDRNOTAVAIL;
312 return(error);
313 }
314 /*
315 * Don't do pcblookup call here; return interface in
316 * plocal_addr6
317 * and exit to caller, that will do the lookup.
318 */
319 }
320
321 if (inp->in6p_route.ro_rt)
322 ifp = inp->in6p_route.ro_rt->rt_ifp;
323
324 return(0);
325}
326
327/*
328 * Outer subroutine:
329 * Connect from a socket to a specified address.
330 * Both address and port must be specified in argument sin.
331 * If don't have a local address for this socket yet,
332 * then pick one.
333 */
334int
335in6_pcbconnect(inp, nam, td)
336 register struct inpcb *inp;
337 struct sockaddr *nam;
338 struct thread *td;
339{
340 struct in6_addr *addr6;
341 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
342 int error;
343
344 /*
345 * Call inner routine, to assign local interface address.
346 */
347 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
348 return(error);
349
350 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
351 sin6->sin6_port,
352 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
353 ? addr6 : &inp->in6p_laddr,
354 inp->inp_lport, 0, NULL) != NULL) {
355 return (EADDRINUSE);
356 }
357 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
358 if (inp->inp_lport == 0) {
359 error = in6_pcbbind(inp, (struct sockaddr *)0, td);
360 if (error)
361 return (error);
362 }
363 inp->in6p_laddr = *addr6;
364 }
365 inp->in6p_faddr = sin6->sin6_addr;
366 inp->inp_fport = sin6->sin6_port;
367 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
368 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
369 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL)
370 inp->in6p_flowinfo |=
371 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
372
373 in_pcbrehash(inp);
374 return (0);
375}
376
377#if 0
378/*
379 * Return an IPv6 address, which is the most appropriate for given
380 * destination and user specified options.
381 * If necessary, this function lookups the routing table and return
382 * an entry to the caller for later use.
383 */
384struct in6_addr *
385in6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp)
386 struct sockaddr_in6 *dstsock;
387 struct ip6_pktopts *opts;
388 struct ip6_moptions *mopts;
389 struct route_in6 *ro;
390 struct in6_addr *laddr;
391 int *errorp;
392{
393 struct in6_addr *dst;
394 struct in6_ifaddr *ia6 = 0;
395 struct in6_pktinfo *pi = NULL;
396
397 dst = &dstsock->sin6_addr;
398 *errorp = 0;
399
400 /*
401 * If the source address is explicitly specified by the caller,
402 * use it.
403 */
404 if (opts && (pi = opts->ip6po_pktinfo) &&
405 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr))
406 return(&pi->ipi6_addr);
407
408 /*
409 * If the source address is not specified but the socket(if any)
410 * is already bound, use the bound address.
411 */
412 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr))
413 return(laddr);
414
415 /*
416 * If the caller doesn't specify the source address but
417 * the outgoing interface, use an address associated with
418 * the interface.
419 */
420 if (pi && pi->ipi6_ifindex) {
421 /* XXX boundary check is assumed to be already done. */
422 ia6 = in6_ifawithscope(ifnet_byindex(pi->ipi6_ifindex), dst);
423 if (ia6 == 0) {
424 *errorp = EADDRNOTAVAIL;
425 return(0);
426 }
427 return(&satosin6(&ia6->ia_addr)->sin6_addr);
428 }
429
430 /*
431 * If the destination address is a link-local unicast address or
432 * a multicast address, and if the outgoing interface is specified
433 * by the sin6_scope_id filed, use an address associated with the
434 * interface.
435 * XXX: We're now trying to define more specific semantics of
436 * sin6_scope_id field, so this part will be rewritten in
437 * the near future.
438 */
439 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
440 dstsock->sin6_scope_id) {
441 /*
442 * I'm not sure if boundary check for scope_id is done
443 * somewhere...
444 */
445 if (dstsock->sin6_scope_id < 0 ||
446 if_index < dstsock->sin6_scope_id) {
447 *errorp = ENXIO; /* XXX: better error? */
448 return(0);
449 }
450 ia6 = in6_ifawithscope(ifnet_byindex(dstsock->sin6_scope_id),
451 dst);
452 if (ia6 == 0) {
453 *errorp = EADDRNOTAVAIL;
454 return(0);
455 }
456 return(&satosin6(&ia6->ia_addr)->sin6_addr);
457 }
458
459 /*
460 * If the destination address is a multicast address and
461 * the outgoing interface for the address is specified
462 * by the caller, use an address associated with the interface.
463 * There is a sanity check here; if the destination has node-local
464 * scope, the outgoing interfacde should be a loopback address.
465 * Even if the outgoing interface is not specified, we also
466 * choose a loopback interface as the outgoing interface.
467 */
468 if (IN6_IS_ADDR_MULTICAST(dst)) {
469 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
470
471 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
472 ifp = &loif[0];
473 }
474
475 if (ifp) {
476 ia6 = in6_ifawithscope(ifp, dst);
477 if (ia6 == 0) {
478 *errorp = EADDRNOTAVAIL;
479 return(0);
480 }
481 return(&ia6->ia_addr.sin6_addr);
482 }
483 }
484
485 /*
486 * If the next hop address for the packet is specified
487 * by caller, use an address associated with the route
488 * to the next hop.
489 */
490 {
491 struct sockaddr_in6 *sin6_next;
492 struct rtentry *rt;
493
494 if (opts && opts->ip6po_nexthop) {
495 sin6_next = satosin6(opts->ip6po_nexthop);
496 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
497 if (rt) {
498 ia6 = in6_ifawithscope(rt->rt_ifp, dst);
499 if (ia6 == 0)
500 ia6 = ifatoia6(rt->rt_ifa);
501 }
502 if (ia6 == 0) {
503 *errorp = EADDRNOTAVAIL;
504 return(0);
505 }
506 return(&satosin6(&ia6->ia_addr)->sin6_addr);
507 }
508 }
509
510 /*
511 * If route is known or can be allocated now,
512 * our src addr is taken from the i/f, else punt.
513 */
514 if (ro) {
515 if (ro->ro_rt &&
516 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
517 RTFREE(ro->ro_rt);
518 ro->ro_rt = (struct rtentry *)0;
519 }
520 if (ro->ro_rt == (struct rtentry *)0 ||
521 ro->ro_rt->rt_ifp == (struct ifnet *)0) {
522 struct sockaddr_in6 *dst6;
523
524 /* No route yet, so try to acquire one */
525 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
526 dst6 = (struct sockaddr_in6 *)&ro->ro_dst;
527 dst6->sin6_family = AF_INET6;
528 dst6->sin6_len = sizeof(struct sockaddr_in6);
529 dst6->sin6_addr = *dst;
530 if (IN6_IS_ADDR_MULTICAST(dst)) {
531 ro->ro_rt = rtalloc1(&((struct route *)ro)
532 ->ro_dst, 0, 0UL);
533 } else {
534 rtalloc((struct route *)ro);
535 }
536 }
537
538 /*
539 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
540 * the address. But we don't know why it does so.
541 * It is necessary to ensure the scope even for lo0
542 * so doesn't check out IFF_LOOPBACK.
543 */
544
545 if (ro->ro_rt) {
546 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
547 if (ia6 == 0) /* xxx scope error ?*/
548 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
549 }
550 if (ia6 == 0) {
551 *errorp = EHOSTUNREACH; /* no route */
552 return(0);
553 }
554 return(&satosin6(&ia6->ia_addr)->sin6_addr);
555 }
556
557 *errorp = EADDRNOTAVAIL;
558 return(0);
559}
560
561/*
562 * Default hop limit selection. The precedence is as follows:
563 * 1. Hoplimit valued specified via ioctl.
564 * 2. (If the outgoing interface is detected) the current
565 * hop limit of the interface specified by router advertisement.
566 * 3. The system default hoplimit.
567*/
568int
569in6_selecthlim(in6p, ifp)
570 struct in6pcb *in6p;
571 struct ifnet *ifp;
572{
573 if (in6p && in6p->in6p_hops >= 0)
574 return(in6p->in6p_hops);
575 else if (ifp)
576 return(nd_ifinfo[ifp->if_index].chlim);
577 else
578 return(ip6_defhlim);
579}
580#endif
581
582void
583in6_pcbdisconnect(inp)
584 struct inpcb *inp;
585{
586 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
587 inp->inp_fport = 0;
588 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
589 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
590 in_pcbrehash(inp);
591 if (inp->inp_socket->so_state & SS_NOFDREF)
592 in6_pcbdetach(inp);
593}
594
595void
596in6_pcbdetach(inp)
597 struct inpcb *inp;
598{
599 struct socket *so = inp->inp_socket;
600 struct inpcbinfo *ipi = inp->inp_pcbinfo;
601
602#ifdef IPSEC
603 if (inp->in6p_sp != NULL)
604 ipsec6_delete_pcbpolicy(inp);
605#endif /* IPSEC */
606 inp->inp_gencnt = ++ipi->ipi_gencnt;
607 in_pcbremlists(inp);
608 sotoinpcb(so) = 0;
609 sofree(so);
610
611 if (inp->in6p_options)
612 m_freem(inp->in6p_options);
613 ip6_freepcbopts(inp->in6p_outputopts);
614 ip6_freemoptions(inp->in6p_moptions);
615 if (inp->in6p_route.ro_rt)
616 rtfree(inp->in6p_route.ro_rt);
617 /* Check and free IPv4 related resources in case of mapped addr */
618 if (inp->inp_options)
619 (void)m_free(inp->inp_options);
620 ip_freemoptions(inp->inp_moptions);
621
622 inp->inp_vflag = 0;
623 zfree(ipi->ipi_zone, inp);
624}
625
626/*
627 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
628 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
629 * in struct pr_usrreqs, so that protocols can just reference then directly
630 * without the need for a wrapper function. The socket must have a valid
631 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
632 * except through a kernel programming error, so it is acceptable to panic
633 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
634 * because there actually /is/ a programming error somewhere... XXX)
635 */
636int
637in6_setsockaddr(so, nam)
638 struct socket *so;
639 struct sockaddr **nam;
640{
641 int s;
642 register struct inpcb *inp;
643 register struct sockaddr_in6 *sin6;
644
645 /*
646 * Do the malloc first in case it blocks.
647 */
648 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
649 bzero(sin6, sizeof *sin6);
650 sin6->sin6_family = AF_INET6;
651 sin6->sin6_len = sizeof(*sin6);
652
653 s = splnet();
654 inp = sotoinpcb(so);
655 if (!inp) {
656 splx(s);
657 free(sin6, M_SONAME);
658 return EINVAL;
659 }
660 sin6->sin6_port = inp->inp_lport;
661 sin6->sin6_addr = inp->in6p_laddr;
662 splx(s);
663 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
664 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
665 else
666 sin6->sin6_scope_id = 0; /*XXX*/
667 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
668 sin6->sin6_addr.s6_addr16[1] = 0;
669
670 *nam = (struct sockaddr *)sin6;
671 return 0;
672}
673
674int
675in6_setpeeraddr(so, nam)
676 struct socket *so;
677 struct sockaddr **nam;
678{
679 int s;
680 struct inpcb *inp;
681 register struct sockaddr_in6 *sin6;
682
683 /*
684 * Do the malloc first in case it blocks.
685 */
686 MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
687 bzero((caddr_t)sin6, sizeof (*sin6));
688 sin6->sin6_family = AF_INET6;
689 sin6->sin6_len = sizeof(struct sockaddr_in6);
690
691 s = splnet();
692 inp = sotoinpcb(so);
693 if (!inp) {
694 splx(s);
695 free(sin6, M_SONAME);
696 return EINVAL;
697 }
698 sin6->sin6_port = inp->inp_fport;
699 sin6->sin6_addr = inp->in6p_faddr;
700 splx(s);
701 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
702 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
703 else
704 sin6->sin6_scope_id = 0; /*XXX*/
705 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
706 sin6->sin6_addr.s6_addr16[1] = 0;
707
708 *nam = (struct sockaddr *)sin6;
709 return 0;
710}
711
712int
713in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
714{
715 struct inpcb *inp = sotoinpcb(so);
716 int error;
717
718 if (inp == NULL)
719 return EINVAL;
720 if (inp->inp_vflag & INP_IPV4) {
721 error = in_setsockaddr(so, nam);
722 if (error == 0)
723 in6_sin_2_v4mapsin6_in_sock(nam);
724 } else
725 error = in6_setsockaddr(so, nam);
726
727 return error;
728}
729
730int
731in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
732{
733 struct inpcb *inp = sotoinpcb(so);
734 int error;
735
736 if (inp == NULL)
737 return EINVAL;
738 if (inp->inp_vflag & INP_IPV4) {
739 error = in_setpeeraddr(so, nam);
740 if (error == 0)
741 in6_sin_2_v4mapsin6_in_sock(nam);
742 } else
743 error = in6_setpeeraddr(so, nam);
744
745 return error;
746}
747
748/*
749 * Pass some notification to all connections of a protocol
750 * associated with address dst. The local address and/or port numbers
751 * may be specified to limit the search. The "usual action" will be
752 * taken, depending on the ctlinput cmd. The caller must filter any
753 * cmds that are uninteresting (e.g., no error in the map).
754 * Call the protocol specific routine (if any) to report
755 * any errors for each matching socket.
756 *
757 * Must be called at splnet.
758 */
759void
760in6_pcbnotify(head, dst, fport_arg, src, lport_arg, cmd, notify)
761 struct inpcbhead *head;
762 struct sockaddr *dst, *src;
763 u_int fport_arg, lport_arg;
764 int cmd;
765 void (*notify) __P((struct inpcb *, int));
766{
767 struct inpcb *inp, *ninp;
768 struct sockaddr_in6 sa6_src, *sa6_dst;
769 u_short fport = fport_arg, lport = lport_arg;
770 u_int32_t flowinfo;
771 int errno, s;
772
773 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6)
774 return;
775
776 sa6_dst = (struct sockaddr_in6 *)dst;
777 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
778 return;
779
780 /*
781 * note that src can be NULL when we get notify by local fragmentation.
782 */
783 sa6_src = (src == NULL) ? sa6_any : *(struct sockaddr_in6 *)src;
784 flowinfo = sa6_src.sin6_flowinfo;
785
786 /*
787 * Redirects go to all references to the destination,
788 * and use in6_rtchange to invalidate the route cache.
789 * Dead host indications: also use in6_rtchange to invalidate
790 * the cache, and deliver the error to all the sockets.
791 * Otherwise, if we have knowledge of the local port and address,
792 * deliver only to that socket.
793 */
794 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
795 fport = 0;
796 lport = 0;
797 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
798
799 if (cmd != PRC_HOSTDEAD)
800 notify = in6_rtchange;
801 }
802 errno = inet6ctlerrmap[cmd];
803 s = splnet();
804 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
805 ninp = LIST_NEXT(inp, inp_list);
806
807 if ((inp->inp_vflag & INP_IPV6) == 0)
808 continue;
809
810 /*
811 * Detect if we should notify the error. If no source and
812 * destination ports are specifed, but non-zero flowinfo and
813 * local address match, notify the error. This is the case
814 * when the error is delivered with an encrypted buffer
815 * by ESP. Otherwise, just compare addresses and ports
816 * as usual.
817 */
818 if (lport == 0 && fport == 0 && flowinfo &&
819 inp->inp_socket != NULL &&
820 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
821 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
822 goto do_notify;
823 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
824 &sa6_dst->sin6_addr) ||
825 inp->inp_socket == 0 ||
826 (lport && inp->inp_lport != lport) ||
827 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
828 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
829 &sa6_src.sin6_addr)) ||
830 (fport && inp->inp_fport != fport))
831 continue;
832
833 do_notify:
834 if (notify)
835 (*notify)(inp, errno);
836 }
837 splx(s);
838}
839
840/*
841 * Lookup a PCB based on the local address and port.
842 */
843struct inpcb *
844in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
845 struct inpcbinfo *pcbinfo;
846 struct in6_addr *laddr;
847 u_int lport_arg;
848 int wild_okay;
849{
850 register struct inpcb *inp;
851 int matchwild = 3, wildcard;
852 u_short lport = lport_arg;
853
854 if (!wild_okay) {
855 struct inpcbhead *head;
856 /*
857 * Look for an unconnected (wildcard foreign addr) PCB that
858 * matches the local address and port we're looking for.
859 */
860 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
861 pcbinfo->hashmask)];
862 LIST_FOREACH(inp, head, inp_hash) {
863 if ((inp->inp_vflag & INP_IPV6) == 0)
864 continue;
865 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
866 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
867 inp->inp_lport == lport) {
868 /*
869 * Found.
870 */
871 return (inp);
872 }
873 }
874 /*
875 * Not found.
876 */
877 return (NULL);
878 } else {
879 struct inpcbporthead *porthash;
880 struct inpcbport *phd;
881 struct inpcb *match = NULL;
882 /*
883 * Best fit PCB lookup.
884 *
885 * First see if this local port is in use by looking on the
886 * port hash list.
887 */
888 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
889 pcbinfo->porthashmask)];
890 LIST_FOREACH(phd, porthash, phd_hash) {
891 if (phd->phd_port == lport)
892 break;
893 }
894 if (phd != NULL) {
895 /*
896 * Port is in use by one or more PCBs. Look for best
897 * fit.
898 */
899 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
900 wildcard = 0;
901 if ((inp->inp_vflag & INP_IPV6) == 0)
902 continue;
903 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
904 wildcard++;
905 if (!IN6_IS_ADDR_UNSPECIFIED(
906 &inp->in6p_laddr)) {
907 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
908 wildcard++;
909 else if (!IN6_ARE_ADDR_EQUAL(
910 &inp->in6p_laddr, laddr))
911 continue;
912 } else {
913 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
914 wildcard++;
915 }
916 if (wildcard < matchwild) {
917 match = inp;
918 matchwild = wildcard;
919 if (matchwild == 0) {
920 break;
921 }
922 }
923 }
924 }
925 return (match);
926 }
927}
928
929void
930in6_pcbpurgeif0(head, ifp)
931 struct in6pcb *head;
932 struct ifnet *ifp;
933{
934 struct in6pcb *in6p;
935 struct ip6_moptions *im6o;
936 struct in6_multi_mship *imm, *nimm;
937
938 for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) {
939 im6o = in6p->in6p_moptions;
940 if ((in6p->inp_vflag & INP_IPV6) &&
941 im6o) {
942 /*
943 * Unselect the outgoing interface if it is being
944 * detached.
945 */
946 if (im6o->im6o_multicast_ifp == ifp)
947 im6o->im6o_multicast_ifp = NULL;
948
949 /*
950 * Drop multicast group membership if we joined
951 * through the interface being detached.
952 * XXX controversial - is it really legal for kernel
953 * to force this?
954 */
955 for (imm = im6o->im6o_memberships.lh_first;
956 imm != NULL; imm = nimm) {
957 nimm = imm->i6mm_chain.le_next;
958 if (imm->i6mm_maddr->in6m_ifp == ifp) {
959 LIST_REMOVE(imm, i6mm_chain);
960 in6_delmulti(imm->i6mm_maddr);
961 free(imm, M_IPMADDR);
962 }
963 }
964 }
965 }
966}
967
968/*
969 * Check for alternatives when higher level complains
970 * about service problems. For now, invalidate cached
971 * routing information. If the route was created dynamically
972 * (by a redirect), time to try a default gateway again.
973 */
974void
975in6_losing(in6p)
976 struct inpcb *in6p;
977{
978 struct rtentry *rt;
979 struct rt_addrinfo info;
980
981 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
982 in6p->in6p_route.ro_rt = 0;
983 bzero((caddr_t)&info, sizeof(info));
984 info.rti_info[RTAX_DST] =
985 (struct sockaddr *)&in6p->in6p_route.ro_dst;
986 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
987 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
988 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
989 if (rt->rt_flags & RTF_DYNAMIC)
990 (void)rtrequest(RTM_DELETE, rt_key(rt),
991 rt->rt_gateway, rt_mask(rt), rt->rt_flags,
992 (struct rtentry **)0);
993 else
994 /*
995 * A new route can be allocated
996 * the next time output is attempted.
997 */
998 rtfree(rt);
999 }
1000}
1001
1002/*
1003 * After a routing change, flush old routing
1004 * and allocate a (hopefully) better one.
1005 */
1006void
1007in6_rtchange(inp, errno)
1008 struct inpcb *inp;
1009 int errno;
1010{
1011 if (inp->in6p_route.ro_rt) {
1012 rtfree(inp->in6p_route.ro_rt);
1013 inp->in6p_route.ro_rt = 0;
1014 /*
1015 * A new route can be allocated the next time
1016 * output is attempted.
1017 */
1018 }
1019}
1020
1021/*
1022 * Lookup PCB in hash list.
1023 */
1024struct inpcb *
1025in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
1026 struct inpcbinfo *pcbinfo;
1027 struct in6_addr *faddr, *laddr;
1028 u_int fport_arg, lport_arg;
1029 int wildcard;
1030 struct ifnet *ifp;
1031{
1032 struct inpcbhead *head;
1033 register struct inpcb *inp;
1034 u_short fport = fport_arg, lport = lport_arg;
1035 int faith;
1036
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