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AMD64 - Fix format conversions and other warnings.
[dragonfly.git] / sys / netinet6 / in6_pcb.c
blob44f3592a4c3bfb25e804a0961c1b7d70f2636d75
1 /* $FreeBSD: src/sys/netinet6/in6_pcb.c,v 1.10.2.9 2003/01/24 05:11:35 sam Exp $ */
2 /* $DragonFly: src/sys/netinet6/in6_pcb.c,v 1.35 2008/09/04 09:08:22 hasso Exp $ */
3 /* $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ */
4
5 /*
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 */
34
35 /*
36 * Copyright (c) 1982, 1986, 1991, 1993
37 * The Regents of the University of California. All rights reserved.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
47 * 3. All advertising materials mentioning features or use of this software
48 * must display the following acknowledgement:
49 * This product includes software developed by the University of
50 * California, Berkeley and its contributors.
51 * 4. Neither the name of the University nor the names of its contributors
52 * may be used to endorse or promote products derived from this software
53 * without specific prior written permission.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
66 *
67 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
68 */
69
70 #include "opt_inet.h"
71 #include "opt_inet6.h"
72 #include "opt_ipsec.h"
73
74 #include <sys/param.h>
75 #include <sys/systm.h>
76 #include <sys/malloc.h>
77 #include <sys/mbuf.h>
78 #include <sys/domain.h>
79 #include <sys/protosw.h>
80 #include <sys/socket.h>
81 #include <sys/socketvar.h>
82 #include <sys/sockio.h>
83 #include <sys/errno.h>
84 #include <sys/time.h>
85 #include <sys/proc.h>
86 #include <sys/priv.h>
87 #include <sys/jail.h>
88 #include <sys/thread2.h>
89
90 #include <vm/vm_zone.h>
91
92 #include <net/if.h>
93 #include <net/if_types.h>
94 #include <net/route.h>
95
96 #include <netinet/in.h>
97 #include <netinet/in_var.h>
98 #include <netinet/in_systm.h>
99 #include <netinet/ip6.h>
100 #include <netinet/ip_var.h>
101 #include <netinet6/ip6_var.h>
102 #include <netinet6/nd6.h>
103 #include <netinet/in_pcb.h>
104 #include <netinet6/in6_pcb.h>
105
106 #ifdef IPSEC
107 #include <netinet6/ipsec.h>
108 #ifdef INET6
109 #include <netinet6/ipsec6.h>
110 #endif
111 #include <netinet6/ah.h>
112 #ifdef INET6
113 #include <netinet6/ah6.h>
114 #endif
115 #include <netproto/key/key.h>
116 #endif /* IPSEC */
117
118 #ifdef FAST_IPSEC
119 #include <netproto/ipsec/ipsec.h>
120 #include <netproto/ipsec/ipsec6.h>
121 #include <netproto/ipsec/key.h>
122 #define IPSEC
123 #endif /* FAST_IPSEC */
124
125 struct in6_addr zeroin6_addr;
126
127 int
128 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
129 {
130 struct socket *so = inp->inp_socket;
131 struct sockaddr_in6 *sin6 = NULL;
132 struct sockaddr_in6 jsin6;
133 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
134 struct proc *p = td->td_proc;
135 struct ucred *cred = NULL;
136 u_short lport = 0;
137 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
138
139 if (!in6_ifaddr) /* XXX broken! */
140 return (EADDRNOTAVAIL);
141 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
142 return (EINVAL);
143 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
144 wild = 1;
145 if (p)
146 cred = p->p_ucred;
147 if (nam) {
148 sin6 = (struct sockaddr_in6 *)nam;
149 if (nam->sa_len != sizeof(*sin6))
150 return (EINVAL);
151 /*
152 * family check.
153 */
154 if (nam->sa_family != AF_INET6)
155 return (EAFNOSUPPORT);
156
157 if (!prison_replace_wildcards(td, nam))
158 return (EINVAL);
159
160 /* KAME hack: embed scopeid */
161 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
162 return EINVAL;
163 /* this must be cleared for ifa_ifwithaddr() */
164 sin6->sin6_scope_id = 0;
165
166 lport = sin6->sin6_port;
167 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
168 /*
169 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
170 * allow compepte duplication of binding if
171 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
172 * and a multicast address is bound on both
173 * new and duplicated sockets.
174 */
175 if (so->so_options & SO_REUSEADDR)
176 reuseport = SO_REUSEADDR|SO_REUSEPORT;
177 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
178 struct ifaddr *ia = NULL;
179
180 sin6->sin6_port = 0; /* yech... */
181 if (!prison_replace_wildcards(td, (struct sockaddr *)sin6)) {
182 sin6->sin6_addr = kin6addr_any;
183 return(EINVAL);
184 }
185 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
186 return (EADDRNOTAVAIL);
187
188 /*
189 * XXX: bind to an anycast address might accidentally
190 * cause sending a packet with anycast source address.
191 * We should allow to bind to a deprecated address, since
192 * the application dare to use it.
193 */
194 if (ia &&
195 ((struct in6_ifaddr *)ia)->ia6_flags &
196 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
197 return (EADDRNOTAVAIL);
198 }
199 }
200 if (lport) {
201 struct inpcb *t;
202
203 /* GROSS */
204 if (ntohs(lport) < IPV6PORT_RESERVED && cred &&
205 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))
206 return (EACCES);
207 if (so->so_cred->cr_uid != 0 &&
208 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
209 t = in6_pcblookup_local(pcbinfo,
210 &sin6->sin6_addr, lport,
211 INPLOOKUP_WILDCARD, cred);
212 if (t &&
213 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
214 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
215 (t->inp_socket->so_options &
216 SO_REUSEPORT) == 0) &&
217 (so->so_cred->cr_uid !=
218 t->inp_socket->so_cred->cr_uid))
219 return (EADDRINUSE);
220 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
221 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
222 struct sockaddr_in sin;
223
224 in6_sin6_2_sin(&sin, sin6);
225 t = in_pcblookup_local(pcbinfo,
226 sin.sin_addr, lport,
227 INPLOOKUP_WILDCARD, cred);
228 if (t &&
229 (so->so_cred->cr_uid !=
230 t->inp_socket->so_cred->cr_uid) &&
231 (ntohl(t->inp_laddr.s_addr) !=
232 INADDR_ANY ||
233 INP_SOCKAF(so) ==
234 INP_SOCKAF(t->inp_socket)))
235 return (EADDRINUSE);
236 }
237 }
238 if (cred && cred->cr_prison &&
239 !prison_replace_wildcards(td, nam))
240 return(EADDRNOTAVAIL);
241 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
242 lport, wild, cred);
243 if (t && (reuseport & t->inp_socket->so_options) == 0)
244 return (EADDRINUSE);
245 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
246 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
247 struct sockaddr_in sin;
248
249 in6_sin6_2_sin(&sin, sin6);
250 t = in_pcblookup_local(pcbinfo,
251 sin.sin_addr, lport,
252 wild, cred);
253 if (t &&
254 (reuseport & t->inp_socket->so_options)
255 == 0 &&
256 (ntohl(t->inp_laddr.s_addr)
257 != INADDR_ANY ||
258 INP_SOCKAF(so) ==
259 INP_SOCKAF(t->inp_socket)))
260 return (EADDRINUSE);
261 }
262 }
263 inp->in6p_laddr = sin6->sin6_addr;
264 }
265 if (lport == 0) {
266 int e;
267
268 jsin6.sin6_addr = inp->in6p_laddr;
269 jsin6.sin6_family = AF_INET6;
270 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin6)) {
271 inp->in6p_laddr = kin6addr_any;
272 inp->inp_lport = 0;
273 return (EINVAL);
274 }
275
276 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, td)) != 0)
277 return (e);
278 }
279 else {
280 inp->inp_lport = lport;
281 if (in_pcbinsporthash(inp) != 0) {
282 inp->in6p_laddr = kin6addr_any;
283 inp->inp_lport = 0;
284 return (EAGAIN);
285 }
286 }
287 return (0);
288 }
289
290 /*
291 * Transform old in6_pcbconnect() into an inner subroutine for new
292 * in6_pcbconnect(): Do some validity-checking on the remote
293 * address (in mbuf 'nam') and then determine local host address
294 * (i.e., which interface) to use to access that remote host.
295 *
296 * This preserves definition of in6_pcbconnect(), while supporting a
297 * slightly different version for T/TCP. (This is more than
298 * a bit of a kludge, but cleaning up the internal interfaces would
299 * have forced minor changes in every protocol).
300 */
301
302 int
303 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
304 struct in6_addr **plocal_addr6, struct thread *td)
305 {
306 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
307 struct ifnet *ifp = NULL;
308 int error = 0;
309
310 if (nam->sa_len != sizeof (*sin6))
311 return (EINVAL);
312 if (sin6->sin6_family != AF_INET6)
313 return (EAFNOSUPPORT);
314 if (sin6->sin6_port == 0)
315 return (EADDRNOTAVAIL);
316
317 /* KAME hack: embed scopeid */
318 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
319 return EINVAL;
320
321 if (in6_ifaddr) {
322 /*
323 * If the destination address is UNSPECIFIED addr,
324 * use the loopback addr, e.g ::1.
325 */
326 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
327 sin6->sin6_addr = kin6addr_loopback;
328 }
329 {
330 /*
331 * XXX: in6_selectsrc might replace the bound local address
332 * with the address specified by setsockopt(IPV6_PKTINFO).
333 * Is it the intended behavior?
334 */
335 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
336 inp->in6p_moptions,
337 &inp->in6p_route,
338 &inp->in6p_laddr, &error, td);
339 if (*plocal_addr6 == 0) {
340 if (error == 0)
341 error = EADDRNOTAVAIL;
342 return (error);
343 }
344 /*
345 * Don't do pcblookup call here; return interface in
346 * plocal_addr6
347 * and exit to caller, that will do the lookup.
348 */
349 }
350
351 if (inp->in6p_route.ro_rt)
352 ifp = inp->in6p_route.ro_rt->rt_ifp;
353
354 return (0);
355 }
356
357 /*
358 * Outer subroutine:
359 * Connect from a socket to a specified address.
360 * Both address and port must be specified in argument sin.
361 * If don't have a local address for this socket yet,
362 * then pick one.
363 */
364 int
365 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
366 {
367 struct in6_addr *addr6;
368 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
369 int error;
370
371 /*
372 * Call inner routine, to assign local interface address.
373 * in6_pcbladdr() may automatically fill in sin6_scope_id.
374 */
375 if ((error = in6_pcbladdr(inp, nam, &addr6, td)) != 0)
376 return (error);
377
378 if (in6_pcblookup_hash(inp->inp_cpcbinfo, &sin6->sin6_addr,
379 sin6->sin6_port,
380 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
381 ? addr6 : &inp->in6p_laddr,
382 inp->inp_lport, 0, NULL) != NULL) {
383 return (EADDRINUSE);
384 }
385 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
386 if (inp->inp_lport == 0) {
387 error = in6_pcbbind(inp, NULL, td);
388 if (error)
389 return (error);
390 }
391 inp->in6p_laddr = *addr6;
392 }
393 inp->in6p_faddr = sin6->sin6_addr;
394 inp->inp_fport = sin6->sin6_port;
395 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
396 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
397 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL)
398 inp->in6p_flowinfo |=
399 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
400
401 in_pcbinsconnhash(inp);
402 return (0);
403 }
404
405 #if 0
406 /*
407 * Return an IPv6 address, which is the most appropriate for given
408 * destination and user specified options.
409 * If necessary, this function lookups the routing table and return
410 * an entry to the caller for later use.
411 */
412 struct in6_addr *
413 in6_selectsrc(struct sockaddr_in6 *dstsock, struct ip6_pktopts *opts,
414 struct ip6_moptions *mopts, struct route_in6 *ro,
415 struct in6_addr *laddr, int *errorp, struct thread *td)
416 {
417 struct sockaddr_in6 jsin6;
418 struct ucred *cred = NULL;
419 struct in6_addr *dst;
420 struct in6_ifaddr *ia6 = 0;
421 struct in6_pktinfo *pi = NULL;
422 int jailed = 0;
423
424 if (td && td->td_proc && td->td_proc->p_ucred)
425 cred = td->td_proc->p_ucred;
426 if (cred && cred->cr_prison)
427 jailed = 1;
428 jsin6.sin6_family = AF_INET6;
429 dst = &dstsock->sin6_addr;
430 *errorp = 0;
431
432 /*
433 * If the source address is explicitly specified by the caller,
434 * use it.
435 */
436 if (opts && (pi = opts->ip6po_pktinfo) &&
437 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) {
438 jsin6.sin6_addr = pi->ipi6_addr;
439 if (jailed && !jailed_ip(cred->cr_prison,
440 (struct sockaddr *)&jsin6)) {
441 return(0);
442 } else {
443 return (&pi->ipi6_addr);
444 }
445 }
446
447 /*
448 * If the source address is not specified but the socket(if any)
449 * is already bound, use the bound address.
450 */
451 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) {
452 jsin6.sin6_addr = *laddr;
453 if (jailed && !jailed_ip(cred->cr_prison,
454 (struct sockaddr *)&jsin6)) {
455 return(0);
456 } else {
457 return (laddr);
458 }
459 }
460
461 /*
462 * If the caller doesn't specify the source address but
463 * the outgoing interface, use an address associated with
464 * the interface.
465 */
466 if (pi && pi->ipi6_ifindex) {
467 /* XXX boundary check is assumed to be already done. */
468 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
469 dst);
470
471 if (ia6 && jailed) {
472 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
473 if (!jailed_ip(cred->cr_prison,
474 (struct sockaddr *)&jsin6))
475 ia6 = 0;
476 }
477
478 if (ia6 == 0) {
479 *errorp = EADDRNOTAVAIL;
480 return (0);
481 }
482 return (&satosin6(&ia6->ia_addr)->sin6_addr);
483 }
484
485 /*
486 * If the destination address is a link-local unicast address or
487 * a multicast address, and if the outgoing interface is specified
488 * by the sin6_scope_id filed, use an address associated with the
489 * interface.
490 * XXX: We're now trying to define more specific semantics of
491 * sin6_scope_id field, so this part will be rewritten in
492 * the near future.
493 */
494 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
495 dstsock->sin6_scope_id) {
496 /*
497 * I'm not sure if boundary check for scope_id is done
498 * somewhere...
499 */
500 if (dstsock->sin6_scope_id < 0 ||
501 if_index < dstsock->sin6_scope_id) {
502 *errorp = ENXIO; /* XXX: better error? */
503 return (0);
504 }
505 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
506 dst);
507
508 if (ia6 && jailed) {
509 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
510 if (!jailed_ip(cred->cr_prison,
511 (struct sockaddr *)&jsin6))
512 ia6 = 0;
513 }
514
515 if (ia6 == 0) {
516 *errorp = EADDRNOTAVAIL;
517 return (0);
518 }
519 return (&satosin6(&ia6->ia_addr)->sin6_addr);
520 }
521
522 /*
523 * If the destination address is a multicast address and
524 * the outgoing interface for the address is specified
525 * by the caller, use an address associated with the interface.
526 * There is a sanity check here; if the destination has node-local
527 * scope, the outgoing interfacde should be a loopback address.
528 * Even if the outgoing interface is not specified, we also
529 * choose a loopback interface as the outgoing interface.
530 */
531 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) {
532 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
533
534 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
535 ifp = &loif[0];
536 }
537
538 if (ifp) {
539 ia6 = in6_ifawithscope(ifp, dst);
540 if (ia6 == 0) {
541 *errorp = EADDRNOTAVAIL;
542 return (0);
543 }
544 return (&ia6->ia_addr.sin6_addr);
545 }
546 }
547
548 /*
549 * If the next hop address for the packet is specified
550 * by caller, use an address associated with the route
551 * to the next hop.
552 */
553 {
554 struct sockaddr_in6 *sin6_next;
555 struct rtentry *rt;
556
557 if (opts && opts->ip6po_nexthop) {
558 sin6_next = satosin6(opts->ip6po_nexthop);
559 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
560 if (rt) {
561 ia6 = in6_ifawithscope(rt->rt_ifp, dst);
562 if (ia6 == 0)
563 ia6 = ifatoia6(rt->rt_ifa);
564 }
565 if (ia6 && jailed) {
566 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
567 if (!jailed_ip(cred->cr_prison,
568 (struct sockaddr *)&jsin6))
569 ia6 = 0;
570 }
571
572 if (ia6 == 0) {
573 *errorp = EADDRNOTAVAIL;
574 return (0);
575 }
576 return (&satosin6(&ia6->ia_addr)->sin6_addr);
577 }
578 }
579
580 /*
581 * If route is known or can be allocated now,
582 * our src addr is taken from the i/f, else punt.
583 */
584 if (ro) {
585 if (ro->ro_rt &&
586 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
587 RTFREE(ro->ro_rt);
588 ro->ro_rt = NULL;
589 }
590 if (ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL) {
591 struct sockaddr_in6 *dst6;
592
593 /* No route yet, so try to acquire one */
594 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
595 dst6 = &ro->ro_dst;
596 dst6->sin6_family = AF_INET6;
597 dst6->sin6_len = sizeof(struct sockaddr_in6);
598 dst6->sin6_addr = *dst;
599 if (!jailed && IN6_IS_ADDR_MULTICAST(dst)) {
600 ro->ro_rt =
601 rtpurelookup((struct sockaddr *)&ro->ro_dst);
602 } else {
603 rtalloc((struct route *)ro);
604 }
605 }
606
607 /*
608 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
609 * the address. But we don't know why it does so.
610 * It is necessary to ensure the scope even for lo0
611 * so doesn't check out IFF_LOOPBACK.
612 */
613
614 if (ro->ro_rt) {
615 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
616 if (ia6 && jailed) {
617 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
618 if (!jailed_ip(cred->cr_prison,
619 (struct sockaddr *)&jsin6))
620 ia6 = 0;
621 }
622
623 if (ia6 == 0) /* xxx scope error ?*/
624 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
625
626 if (ia6 && jailed) {
627 jsin6.sin6_addr = (&ia6->ia_addr)->sin6_addr;
628 if (!jailed_ip(cred->cr_prison,
629 (struct sockaddr *)&jsin6))
630 ia6 = 0;
631 }
632 }
633 if (ia6 == 0) {
634 *errorp = EHOSTUNREACH; /* no route */
635 return (0);
636 }
637 return (&satosin6(&ia6->ia_addr)->sin6_addr);
638 }
639
640 *errorp = EADDRNOTAVAIL;
641 return (0);
642 }
643
644 /*
645 * Default hop limit selection. The precedence is as follows:
646 * 1. Hoplimit valued specified via ioctl.
647 * 2. (If the outgoing interface is detected) the current
648 * hop limit of the interface specified by router advertisement.
649 * 3. The system default hoplimit.
650 */
651 int
652 in6_selecthlim(struct in6pcb *in6p, struct ifnet *ifp)
653 {
654 if (in6p && in6p->in6p_hops >= 0)
655 return (in6p->in6p_hops);
656 else if (ifp)
657 return (ND_IFINFO(ifp)->chlim);
658 else
659 return (ip6_defhlim);
660 }
661 #endif
662
663 void
664 in6_pcbdisconnect(struct inpcb *inp)
665 {
666 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
667 inp->inp_fport = 0;
668 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
669 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
670 in_pcbremconnhash(inp);
671 if (inp->inp_socket->so_state & SS_NOFDREF)
672 in6_pcbdetach(inp);
673 }
674
675 void
676 in6_pcbdetach(struct inpcb *inp)
677 {
678 struct socket *so = inp->inp_socket;
679 struct inpcbinfo *ipi = inp->inp_pcbinfo;
680
681 #ifdef IPSEC
682 if (inp->in6p_sp != NULL)
683 ipsec6_delete_pcbpolicy(inp);
684 #endif /* IPSEC */
685 inp->inp_gencnt = ++ipi->ipi_gencnt;
686 in_pcbremlists(inp);
687 so->so_pcb = NULL;
688 sofree(so);
689
690 if (inp->in6p_options)
691 m_freem(inp->in6p_options);
692 ip6_freepcbopts(inp->in6p_outputopts);
693 ip6_freemoptions(inp->in6p_moptions);
694 if (inp->in6p_route.ro_rt)
695 rtfree(inp->in6p_route.ro_rt);
696 /* Check and free IPv4 related resources in case of mapped addr */
697 if (inp->inp_options)
698 m_free(inp->inp_options);
699 ip_freemoptions(inp->inp_moptions);
700
701 inp->inp_vflag = 0;
702 zfree(ipi->ipi_zone, inp);
703 }
704
705 /*
706 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
707 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
708 * in struct pr_usrreqs, so that protocols can just reference then directly
709 * without the need for a wrapper function. The socket must have a valid
710 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
711 * except through a kernel programming error, so it is acceptable to panic
712 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
713 * because there actually /is/ a programming error somewhere... XXX)
714 */
715 int
716 in6_setsockaddr(struct socket *so, struct sockaddr **nam)
717 {
718 struct inpcb *inp;
719 struct sockaddr_in6 *sin6;
720
721 /*
722 * Do the malloc first in case it blocks.
723 */
724 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME,
725 M_WAITOK | M_ZERO);
726 sin6->sin6_family = AF_INET6;
727 sin6->sin6_len = sizeof(*sin6);
728
729 crit_enter();
730 inp = so->so_pcb;
731 if (!inp) {
732 crit_exit();
733 kfree(sin6, M_SONAME);
734 return EINVAL;
735 }
736 sin6->sin6_port = inp->inp_lport;
737 sin6->sin6_addr = inp->in6p_laddr;
738 crit_exit();
739 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
740 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
741 else
742 sin6->sin6_scope_id = 0; /*XXX*/
743 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
744 sin6->sin6_addr.s6_addr16[1] = 0;
745
746 *nam = (struct sockaddr *)sin6;
747 return 0;
748 }
749
750 int
751 in6_setpeeraddr(struct socket *so, struct sockaddr **nam)
752 {
753 struct inpcb *inp;
754 struct sockaddr_in6 *sin6;
755
756 /*
757 * Do the malloc first in case it blocks.
758 */
759 MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME,
760 M_WAITOK | M_ZERO);
761 sin6->sin6_family = AF_INET6;
762 sin6->sin6_len = sizeof(struct sockaddr_in6);
763
764 crit_enter();
765 inp = so->so_pcb;
766 if (!inp) {
767 crit_exit();
768 kfree(sin6, M_SONAME);
769 return EINVAL;
770 }
771 sin6->sin6_port = inp->inp_fport;
772 sin6->sin6_addr = inp->in6p_faddr;
773 crit_exit();
774 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
775 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
776 else
777 sin6->sin6_scope_id = 0; /*XXX*/
778 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
779 sin6->sin6_addr.s6_addr16[1] = 0;
780
781 *nam = (struct sockaddr *)sin6;
782 return 0;
783 }
784
785 int
786 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
787 {
788 struct inpcb *inp = so->so_pcb;
789 int error;
790
791 if (inp == NULL)
792 return EINVAL;
793 if (inp->inp_vflag & INP_IPV4) {
794 error = in_setsockaddr(so, nam);
795 if (error == 0)
796 in6_sin_2_v4mapsin6_in_sock(nam);
797 } else
798 /* scope issues will be handled in in6_setsockaddr(). */
799 error = in6_setsockaddr(so, nam);
800
801 return error;
802 }
803
804 int
805 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
806 {
807 struct inpcb *inp = so->so_pcb;
808 int error;
809
810 if (inp == NULL)
811 return EINVAL;
812 if (inp->inp_vflag & INP_IPV4) {
813 error = in_setpeeraddr(so, nam);
814 if (error == 0)
815 in6_sin_2_v4mapsin6_in_sock(nam);
816 } else
817 /* scope issues will be handled in in6_setpeeraddr(). */
818 error = in6_setpeeraddr(so, nam);
819
820 return error;
821 }
822
823 /*
824 * Pass some notification to all connections of a protocol
825 * associated with address dst. The local address and/or port numbers
826 * may be specified to limit the search. The "usual action" will be
827 * taken, depending on the ctlinput cmd. The caller must filter any
828 * cmds that are uninteresting (e.g., no error in the map).
829 * Call the protocol specific routine (if any) to report
830 * any errors for each matching socket.
831 *
832 * Must be called under crit_enter().
833 */
834 void
835 in6_pcbnotify(struct inpcbhead *head, struct sockaddr *dst, in_port_t fport,
836 const struct sockaddr *src, in_port_t lport, int cmd, int arg,
837 void (*notify) (struct inpcb *, int))
838 {
839 struct inpcb *inp, *ninp;
840 struct sockaddr_in6 sa6_src, *sa6_dst;
841 u_int32_t flowinfo;
842
843 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
844 return;
845
846 sa6_dst = (struct sockaddr_in6 *)dst;
847 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
848 return;
849
850 /*
851 * note that src can be NULL when we get notify by local fragmentation.
852 */
853 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
854 flowinfo = sa6_src.sin6_flowinfo;
855
856 /*
857 * Redirects go to all references to the destination,
858 * and use in6_rtchange to invalidate the route cache.
859 * Dead host indications: also use in6_rtchange to invalidate
860 * the cache, and deliver the error to all the sockets.
861 * Otherwise, if we have knowledge of the local port and address,
862 * deliver only to that socket.
863 */
864 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
865 fport = 0;
866 lport = 0;
867 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
868
869 if (cmd != PRC_HOSTDEAD)
870 notify = in6_rtchange;
871 }
872 if (cmd != PRC_MSGSIZE)
873 arg = inet6ctlerrmap[cmd];
874 crit_enter();
875 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
876 ninp = LIST_NEXT(inp, inp_list);
877
878 if (inp->inp_flags & INP_PLACEMARKER)
879 continue;
880
881 if ((inp->inp_vflag & INP_IPV6) == 0)
882 continue;
883 /*
884 * If the error designates a new path MTU for a destination
885 * and the application (associated with this socket) wanted to
886 * know the value, notify. Note that we notify for all
887 * disconnected sockets if the corresponding application
888 * wanted. This is because some UDP applications keep sending
889 * sockets disconnected.
890 * XXX: should we avoid to notify the value to TCP sockets?
891 */
892 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
893 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
894 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
895 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, &arg);
896 }
897
898 /*
899 * Detect if we should notify the error. If no source and
900 * destination ports are specifed, but non-zero flowinfo and
901 * local address match, notify the error. This is the case
902 * when the error is delivered with an encrypted buffer
903 * by ESP. Otherwise, just compare addresses and ports
904 * as usual.
905 */
906 if (lport == 0 && fport == 0 && flowinfo &&
907 inp->inp_socket != NULL &&
908 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
909 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
910 goto do_notify;
911 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
912 &sa6_dst->sin6_addr) ||
913 inp->inp_socket == 0 ||
914 (lport && inp->inp_lport != lport) ||
915 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
916 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
917 &sa6_src.sin6_addr)) ||
918 (fport && inp->inp_fport != fport))
919 continue;
920
921 do_notify:
922 if (notify)
923 (*notify)(inp, arg);
924 }
925 crit_exit();
926 }
927
928 /*
929 * Lookup a PCB based on the local address and port.
930 */
931 struct inpcb *
932 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
933 u_int lport_arg, int wild_okay, struct ucred *cred)
934 {
935 struct inpcb *inp;
936 int matchwild = 3, wildcard;
937 u_short lport = lport_arg;
938 struct inpcbporthead *porthash;
939 struct inpcbport *phd;
940 struct inpcb *match = NULL;
941
942 /*
943 * Best fit PCB lookup.
944 *
945 * First see if this local port is in use by looking on the
946 * port hash list.
947 */
948 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
949 pcbinfo->porthashmask)];
950 LIST_FOREACH(phd, porthash, phd_hash) {
951 if (phd->phd_port == lport)
952 break;
953 }
954 if (phd != NULL) {
955 /*
956 * Port is in use by one or more PCBs. Look for best
957 * fit.
958 */
959 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
960 wildcard = 0;
961 if ((inp->inp_vflag & INP_IPV6) == 0)
962 continue;
963 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
964 wildcard++;
965 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
966 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
967 wildcard++;
968 else if (!IN6_ARE_ADDR_EQUAL(
969 &inp->in6p_laddr, laddr))
970 continue;
971 } else {
972 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
973 wildcard++;
974 }
975 if (wildcard && !wild_okay)
976 continue;
977 if (wildcard < matchwild &&
978 (cred == NULL ||
979 cred->cr_prison ==
980 inp->inp_socket->so_cred->cr_prison)) {
981 match = inp;
982 matchwild = wildcard;
983 if (wildcard == 0)
984 break;
985 else
986 matchwild = wildcard;
987 }
988 }
989 }
990 return (match);
991 }
992
993 void
994 in6_pcbpurgeif0(struct in6pcb *head, struct ifnet *ifp)
995 {
996 struct in6pcb *in6p;
997 struct ip6_moptions *im6o;
998 struct in6_multi_mship *imm, *nimm;
999
1000 for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) {
1001 if (in6p->in6p_flags & INP_PLACEMARKER)
1002 continue;
1003 im6o = in6p->in6p_moptions;
1004 if ((in6p->inp_vflag & INP_IPV6) &&
1005 im6o) {
1006 /*
1007 * Unselect the outgoing interface if it is being
1008 * detached.
1009 */
1010 if (im6o->im6o_multicast_ifp == ifp)
1011 im6o->im6o_multicast_ifp = NULL;
1012
1013 /*
1014 * Drop multicast group membership if we joined
1015 * through the interface being detached.
1016 * XXX controversial - is it really legal for kernel
1017 * to force this?
1018 */
1019 for (imm = im6o->im6o_memberships.lh_first;
1020 imm != NULL; imm = nimm) {
1021 nimm = imm->i6mm_chain.le_next;
1022 if (imm->i6mm_maddr->in6m_ifp == ifp) {
1023 LIST_REMOVE(imm, i6mm_chain);
1024 in6_delmulti(imm->i6mm_maddr);
1025 kfree(imm, M_IPMADDR);
1026 }
1027 }
1028 }
1029 }
1030 }
1031
1032 /*
1033 * Check for alternatives when higher level complains
1034 * about service problems. For now, invalidate cached
1035 * routing information. If the route was created dynamically
1036 * (by a redirect), time to try a default gateway again.
1037 */
1038 void
1039 in6_losing(struct inpcb *in6p)
1040 {
1041 struct rtentry *rt;
1042 struct rt_addrinfo info;
1043
1044 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
1045 bzero((caddr_t)&info, sizeof(info));
1046 info.rti_flags = rt->rt_flags;
1047 info.rti_info[RTAX_DST] = rt_key(rt);
1048 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1049 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1050 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
1051 if (rt->rt_flags & RTF_DYNAMIC)
1052 rtrequest1_global(RTM_DELETE, &info, NULL, NULL);
1053 in6p->in6p_route.ro_rt = NULL;
1054 rtfree(rt);
1055 /*
1056 * A new route can be allocated
1057 * the next time output is attempted.
1058 */
1059 }
1060 }
1061
1062 /*
1063 * After a routing change, flush old routing
1064 * and allocate a (hopefully) better one.
1065 */
1066 void
1067 in6_rtchange(struct inpcb *inp, int error)
1068 {
1069 if (inp->in6p_route.ro_rt) {
1070 rtfree(inp->in6p_route.ro_rt);
1071 inp->in6p_route.ro_rt = 0;
1072 /*
1073 * A new route can be allocated the next time
1074 * output is attempted.
1075 */
1076 }
1077 }
1078
1079 /*
1080 * Lookup PCB in hash list.
1081 */
1082 struct inpcb *
1083 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1084 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
1085 int wildcard, struct ifnet *ifp)
1086 {
1087 struct inpcbhead *head;
1088 struct inpcb *inp;
1089 struct inpcb *jinp = NULL;
1090 u_short fport = fport_arg, lport = lport_arg;
1091 int faith;
1092
1093 if (faithprefix_p != NULL)
1094 faith = (*faithprefix_p)(laddr);
1095 else
1096 faith = 0;
1097
1098 /*
1099 * First look for an exact match.
1100 */
1101 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr->s6_addr32[3] /* XXX */,
1102 fport,
1103 laddr->s6_addr32[3], /* XXX JH */
1104 lport,
1105 pcbinfo->hashmask)];
1106 LIST_FOREACH(inp, head, inp_hash) {
1107 if ((inp->inp_vflag & INP_IPV6) == 0)
1108 continue;
1109 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1110 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1111 inp->inp_fport == fport &&
1112 inp->inp_lport == lport) {
1113 /*
1114 * Found.
1115 */
1116 if (inp->inp_socket == NULL ||
1117 inp->inp_socket->so_cred->cr_prison == NULL) {
1118 return (inp);
1119 } else {
1120 if (jinp == NULL)
1121 jinp = inp;
1122 }
1123 }
1124 }
1125 if (jinp != NULL)
1126 return(jinp);
1127 if (wildcard) {
1128 struct inpcontainerhead *chead;
1129 struct inpcontainer *ic;
1130 struct inpcb *local_wild = NULL;
1131 struct inpcb *jinp_wild = NULL;
1132 struct sockaddr_in6 jsin6;
1133 struct ucred *cred;
1134
1135 /*
1136 * Order of socket selection:
1137 * 1. non-jailed, non-wild.
1138 * 2. non-jailed, wild.
1139 * 3. jailed, non-wild.
1140 * 4. jailed, wild.
1141 */
1142 jsin6.sin6_family = AF_INET6;
1143 chead = &pcbinfo->wildcardhashbase[INP_PCBWILDCARDHASH(lport,
1144 pcbinfo->wildcardhashmask)];
1145 LIST_FOREACH(ic, chead, ic_list) {
1146 inp = ic->ic_inp;
1147
1148 if (!(inp->inp_vflag & INP_IPV6))
1149 continue;
1150 if (inp->inp_socket != NULL)
1151 cred = inp->inp_socket->so_cred;
1152 else
1153 cred = NULL;
1154
1155 if (cred != NULL && jailed(cred)) {
1156 if (jinp != NULL) {
1157 continue;
1158 } else {
1159 jsin6.sin6_addr = *laddr;
1160 if (!jailed_ip(cred->cr_prison,
1161 (struct sockaddr *)&jsin6))
1162 continue;
1163 }
1164 }
1165 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
1166 inp->inp_lport == lport) {
1167 if (faith && (inp->inp_flags & INP_FAITH) == 0)
1168 continue;
1169 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
1170 laddr)) {
1171 if (cred != NULL && jailed(cred))
1172 jinp = inp;
1173 else
1174 return (inp);
1175 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
1176 if (cred != NULL && jailed(cred))
1177 jinp_wild = inp;
1178 else
1179 local_wild = inp;
1180 }
1181 }
1182 }
1183 if (local_wild != NULL)
1184 return (local_wild);
1185 if (jinp != NULL)
1186 return (jinp);
1187 return (jinp_wild);
1188 }
1189
1190 /*
1191 * Not found.
1192 */
1193 return (NULL);
1194 }
1195
1196 void
1197 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1198 {
1199 struct ip6_hdr *ip;
1200
1201 ip = mtod(m, struct ip6_hdr *);
1202 bzero(sin6, sizeof(*sin6));
1203 sin6->sin6_len = sizeof(*sin6);
1204 sin6->sin6_family = AF_INET6;
1205 sin6->sin6_addr = ip->ip6_src;
1206 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1207 sin6->sin6_addr.s6_addr16[1] = 0;
1208 sin6->sin6_scope_id =
1209 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1210 ? m->m_pkthdr.rcvif->if_index : 0;
1211
1212 return;
1213 }
DragonFly BSD