1/* $FreeBSD: head/sys/netinet6/in6_pcb.c 71350 2001-01-21 22:23:11Z des $ */
2/* $KAME: in6_pcb.c,v 1.8 2000/06/09 00:37:02 itojun 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_ipsec.h"
70
71#include <sys/param.h>
72#include <sys/systm.h>
73#include <sys/malloc.h>
74#include <sys/mbuf.h>
75#include <sys/domain.h>
76#include <sys/protosw.h>
77#include <sys/socket.h>
78#include <sys/socketvar.h>
79#include <sys/sockio.h>
80#include <sys/errno.h>
81#include <sys/time.h>
82#include <sys/proc.h>
83#include <sys/jail.h>
84
85#include <vm/vm_zone.h>
86
87#include <net/if.h>
88#include <net/if_types.h>
89#include <net/route.h>
90
91#include <netinet/in.h>
92#include <netinet/in_var.h>
93#include <netinet/in_systm.h>
94#include <netinet/ip6.h>
95#include <netinet/ip_var.h>
96#include <netinet6/ip6_var.h>
97#include <netinet6/nd6.h>
98#include <netinet/in_pcb.h>
99#include <netinet6/in6_pcb.h>
100
101#include "faith.h"
102
103#ifdef IPSEC
104#include <netinet6/ipsec.h>
105#include <netinet6/ah.h>
106#include <netinet6/ipsec6.h>
107#include <netinet6/ah6.h>
108#include <netkey/key.h>
109#endif /* IPSEC */
110
111struct in6_addr zeroin6_addr;
112
113int
114in6_pcbbind(inp, nam, p)
115 register struct inpcb *inp;
116 struct sockaddr *nam;
117 struct proc *p;
118{
119 struct socket *so = inp->inp_socket;
120 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
121 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
122 u_short lport = 0;
123 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
124
125 if (!in6_ifaddr) /* XXX broken! */
126 return (EADDRNOTAVAIL);
127 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
128 return(EINVAL);
129 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
130 wild = 1;
131 if (nam) {
132 sin6 = (struct sockaddr_in6 *)nam;
133 if (nam->sa_len != sizeof(*sin6))
134 return(EINVAL);
135 /*
136 * family check.
137 */
138 if (nam->sa_family != AF_INET6)
139 return(EAFNOSUPPORT);
140
141 /* KAME hack: embed scopeid */
142 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
143 return EINVAL;
144 /* this must be cleared for ifa_ifwithaddr() */
145 sin6->sin6_scope_id = 0;
146
147 lport = sin6->sin6_port;
148 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
149 /*
150 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
151 * allow compepte duplication of binding if
152 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
153 * and a multicast address is bound on both
154 * new and duplicated sockets.
155 */
156 if (so->so_options & SO_REUSEADDR)
157 reuseport = SO_REUSEADDR|SO_REUSEPORT;
158 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
159 struct ifaddr *ia = NULL;
160
161 sin6->sin6_port = 0; /* yech... */
162 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
163 return(EADDRNOTAVAIL);
164
165 /*
166 * XXX: bind to an anycast address might accidentally
167 * cause sending a packet with anycast source address.
168 */
169 if (ia &&
170 ((struct in6_ifaddr *)ia)->ia6_flags &
171 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
172 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
173 return(EADDRNOTAVAIL);
174 }
175 }
176 if (lport) {
177 struct inpcb *t;
178
179 /* GROSS */
180 if (ntohs(lport) < IPV6PORT_RESERVED && p &&
181 suser_xxx(0, p, PRISON_ROOT))
182 return(EACCES);
183 if (so->so_cred->cr_uid != 0 &&
184 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
185 t = in6_pcblookup_local(pcbinfo,
186 &sin6->sin6_addr, lport,
187 INPLOOKUP_WILDCARD);
188 if (t &&
189 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
190 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
191 (t->inp_socket->so_options &
192 SO_REUSEPORT) == 0) &&
193 (so->so_cred->cr_uid !=
194 t->inp_socket->so_cred->cr_uid))
195 return (EADDRINUSE);
196 if (ip6_mapped_addr_on != 0 &&
197 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
198 struct sockaddr_in sin;
199
200 in6_sin6_2_sin(&sin, sin6);
201 t = in_pcblookup_local(pcbinfo,
202 sin.sin_addr, lport,
203 INPLOOKUP_WILDCARD);
204 if (t &&
205 (so->so_cred->cr_uid !=
206 t->inp_socket->so_cred->cr_uid) &&
207 (ntohl(t->inp_laddr.s_addr) !=
208 INADDR_ANY ||
209 INP_SOCKAF(so) ==
210 INP_SOCKAF(t->inp_socket)))
211 return (EADDRINUSE);
212 }
213 }
214 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
215 lport, wild);
216 if (t && (reuseport & t->inp_socket->so_options) == 0)
217 return(EADDRINUSE);
218 if (ip6_mapped_addr_on != 0 &&
219 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
220 struct sockaddr_in sin;
221
222 in6_sin6_2_sin(&sin, sin6);
223 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
224 lport, wild);
225 if (t &&
226 (reuseport & t->inp_socket->so_options)
227 == 0 &&
228 (ntohl(t->inp_laddr.s_addr)
229 != INADDR_ANY ||
230 INP_SOCKAF(so) ==
231 INP_SOCKAF(t->inp_socket)))
232 return (EADDRINUSE);
233 }
234 }
235 inp->in6p_laddr = sin6->sin6_addr;
236 }
237 if (lport == 0) {
238 int e;
239 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, p)) != 0)
240 return(e);
241 }
242 else {
243 inp->inp_lport = lport;
244 if (in_pcbinshash(inp) != 0) {
245 inp->in6p_laddr = in6addr_any;
246 inp->inp_lport = 0;
247 return (EAGAIN);
248 }
249 }
250 inp->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/
251 return(0);
252}
253
254/*
255 * Transform old in6_pcbconnect() into an inner subroutine for new
256 * in6_pcbconnect(): Do some validity-checking on the remote
257 * address (in mbuf 'nam') and then determine local host address
258 * (i.e., which interface) to use to access that remote host.
259 *
260 * This preserves definition of in6_pcbconnect(), while supporting a
261 * slightly different version for T/TCP. (This is more than
262 * a bit of a kludge, but cleaning up the internal interfaces would
263 * have forced minor changes in every protocol).
264 */
265
266int
267in6_pcbladdr(inp, nam, plocal_addr6)
268 register struct inpcb *inp;
269 struct sockaddr *nam;
270 struct in6_addr **plocal_addr6;
271{
272 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
273 struct in6_pktinfo *pi;
274 struct ifnet *ifp = NULL;
275 int error = 0;
276
277 if (nam->sa_len != sizeof (*sin6))
278 return (EINVAL);
279 if (sin6->sin6_family != AF_INET6)
280 return (EAFNOSUPPORT);
281 if (sin6->sin6_port == 0)
282 return (EADDRNOTAVAIL);
283
284 /* KAME hack: embed scopeid */
285 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
286 return EINVAL;
287
288 if (in6_ifaddr) {
289 /*
290 * If the destination address is UNSPECIFIED addr,
291 * use the loopback addr, e.g ::1.
292 */
293 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
294 sin6->sin6_addr = in6addr_loopback;
295 }
296 {
297 /*
298 * XXX: in6_selectsrc might replace the bound local address
299 * with the address specified by setsockopt(IPV6_PKTINFO).
300 * Is it the intended behavior?
301 */
302 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
303 inp->in6p_moptions,
304 &inp->in6p_route,
305 &inp->in6p_laddr, &error);
306 if (*plocal_addr6 == 0) {
307 if (error == 0)
308 error = EADDRNOTAVAIL;
309 return(error);
310 }
311 /*
312 * Don't do pcblookup call here; return interface in
313 * plocal_addr6
314 * and exit to caller, that will do the lookup.
315 */
316 }
317
318 if (inp->in6p_route.ro_rt)
319 ifp = inp->in6p_route.ro_rt->rt_ifp;
320
321 return(0);
322}
323
324/*
325 * Outer subroutine:
326 * Connect from a socket to a specified address.
327 * Both address and port must be specified in argument sin.
328 * If don't have a local address for this socket yet,
329 * then pick one.
330 */
331int
332in6_pcbconnect(inp, nam, p)
333 register struct inpcb *inp;
334 struct sockaddr *nam;
335 struct proc *p;
336{
337 struct in6_addr *addr6;
338 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
339 int error;
340
341 /*
342 * Call inner routine, to assign local interface address.
343 */
344 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
345 return(error);
346
347 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
348 sin6->sin6_port,
349 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
350 ? addr6 : &inp->in6p_laddr,
351 inp->inp_lport, 0, NULL) != NULL) {
352 return (EADDRINUSE);
353 }
354 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
355 if (inp->inp_lport == 0) {
356 error = in6_pcbbind(inp, (struct sockaddr *)0, p);
357 if (error)
358 return (error);
359 }
360 inp->in6p_laddr = *addr6;
361 }
362 inp->in6p_faddr = sin6->sin6_addr;
363 inp->inp_fport = sin6->sin6_port;
364 /*
365 * xxx kazu flowlabel is necessary for connect?
366 * but if this line is missing, the garbage value remains.
367 */
368 inp->in6p_flowinfo = sin6->sin6_flowinfo;
369 if ((inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) == 0 &&
370 ip6_auto_flowlabel != 0)
371 inp->in6p_flowinfo |=
372 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
373
374 in_pcbrehash(inp);
375 return (0);
376}
377
378#if 0
379/*
380 * Return an IPv6 address, which is the most appropriate for given
381 * destination and user specified options.
382 * If necessary, this function lookups the routing table and return
383 * an entry to the caller for later use.
384 */
385struct in6_addr *
386in6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp)
387 struct sockaddr_in6 *dstsock;
388 struct ip6_pktopts *opts;
389 struct ip6_moptions *mopts;
390 struct route_in6 *ro;
391 struct in6_addr *laddr;
392 int *errorp;
393{
394 struct in6_addr *dst;
395 struct in6_ifaddr *ia6 = 0;
396 struct in6_pktinfo *pi = NULL;
397
398 dst = &dstsock->sin6_addr;
399 *errorp = 0;
400
401 /*
402 * If the source address is explicitly specified by the caller,
403 * use it.
404 */
405 if (opts && (pi = opts->ip6po_pktinfo) &&
406 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr))
407 return(&pi->ipi6_addr);
408
409 /*
410 * If the source address is not specified but the socket(if any)
411 * is already bound, use the bound address.
412 */
413 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr))
414 return(laddr);
415
416 /*
417 * If the caller doesn't specify the source address but
418 * the outgoing interface, use an address associated with
419 * the interface.
420 */
421 if (pi && pi->ipi6_ifindex) {
422 /* XXX boundary check is assumed to be already done. */
423 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
424 dst);
425 if (ia6 == 0) {
426 *errorp = EADDRNOTAVAIL;
427 return(0);
428 }
429 return(&satosin6(&ia6->ia_addr)->sin6_addr);
430 }
431
432 /*
433 * If the destination address is a link-local unicast address or
434 * a multicast address, and if the outgoing interface is specified
435 * by the sin6_scope_id filed, use an address associated with the
436 * interface.
437 * XXX: We're now trying to define more specific semantics of
438 * sin6_scope_id field, so this part will be rewritten in
439 * the near future.
440 */
441 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
442 dstsock->sin6_scope_id) {
443 /*
444 * I'm not sure if boundary check for scope_id is done
445 * somewhere...
446 */
447 if (dstsock->sin6_scope_id < 0 ||
448 if_index < dstsock->sin6_scope_id) {
449 *errorp = ENXIO; /* XXX: better error? */
450 return(0);
451 }
452 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
453 dst);
454 if (ia6 == 0) {
455 *errorp = EADDRNOTAVAIL;
456 return(0);
457 }
458 return(&satosin6(&ia6->ia_addr)->sin6_addr);
459 }
460
461 /*
462 * If the destination address is a multicast address and
463 * the outgoing interface for the address is specified
464 * by the caller, use an address associated with the interface.
465 * There is a sanity check here; if the destination has node-local
466 * scope, the outgoing interfacde should be a loopback address.
467 * Even if the outgoing interface is not specified, we also
468 * choose a loopback interface as the outgoing interface.
469 */
470 if (IN6_IS_ADDR_MULTICAST(dst)) {
471 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
472
473 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
474 ifp = &loif[0];
475 }
476
477 if (ifp) {
478 ia6 = in6_ifawithscope(ifp, dst);
479 if (ia6 == 0) {
480 *errorp = EADDRNOTAVAIL;
481 return(0);
482 }
483 return(&ia6->ia_addr.sin6_addr);
484 }
485 }
486
487 /*
488 * If the next hop address for the packet is specified
489 * by caller, use an address associated with the route
490 * to the next hop.
491 */
492 {
493 struct sockaddr_in6 *sin6_next;
494 struct rtentry *rt;
495
496 if (opts && opts->ip6po_nexthop) {
497 sin6_next = satosin6(opts->ip6po_nexthop);
498 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
499 if (rt) {
500 ia6 = in6_ifawithscope(rt->rt_ifp, dst);
501 if (ia6 == 0)
502 ia6 = ifatoia6(rt->rt_ifa);
503 }
504 if (ia6 == 0) {
505 *errorp = EADDRNOTAVAIL;
506 return(0);
507 }
508 return(&satosin6(&ia6->ia_addr)->sin6_addr);
509 }
510 }
511
512 /*
513 * If route is known or can be allocated now,
514 * our src addr is taken from the i/f, else punt.
515 */
516 if (ro) {
517 if (ro->ro_rt &&
518 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
519 RTFREE(ro->ro_rt);
520 ro->ro_rt = (struct rtentry *)0;
521 }
522 if (ro->ro_rt == (struct rtentry *)0 ||
523 ro->ro_rt->rt_ifp == (struct ifnet *)0) {
524 /* No route yet, so try to acquire one */
525 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
526 ro->ro_dst.sin6_family = AF_INET6;
527 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6);
528 ro->ro_dst.sin6_addr = *dst;
529 if (IN6_IS_ADDR_MULTICAST(dst)) {
530 ro->ro_rt = rtalloc1(&((struct route *)ro)
531 ->ro_dst, 0, 0UL);
532 } else {
533 rtalloc((struct route *)ro);
534 }
535 }
536
537 /*
538 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
539 * the address. But we don't know why it does so.
540 * It is necessary to ensure the scope even for lo0
541 * so doesn't check out IFF_LOOPBACK.
542 */
543
544 if (ro->ro_rt) {
545 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
546 if (ia6 == 0) /* xxx scope error ?*/
547 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
548 }
549 if (ia6 == 0) {
550 *errorp = EHOSTUNREACH; /* no route */
551 return(0);
552 }
553 return(&satosin6(&ia6->ia_addr)->sin6_addr);
554 }
555
556 *errorp = EADDRNOTAVAIL;
557 return(0);
558}
559
560/*
561 * Default hop limit selection. The precedence is as follows:
562 * 1. Hoplimit valued specified via ioctl.
563 * 2. (If the outgoing interface is detected) the current
564 * hop limit of the interface specified by router advertisement.
565 * 3. The system default hoplimit.
566*/
567int
568in6_selecthlim(in6p, ifp)
569 struct in6pcb *in6p;
570 struct ifnet *ifp;
571{
572 if (in6p && in6p->in6p_hops >= 0)
573 return(in6p->in6p_hops);
574 else if (ifp)
575 return(nd_ifinfo[ifp->if_index].chlim);
576 else
577 return(ip6_defhlim);
578}
579#endif
580
581void
582in6_pcbdisconnect(inp)
583 struct inpcb *inp;
584{
585 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
586 inp->inp_fport = 0;
587 in_pcbrehash(inp);
588 if (inp->inp_socket->so_state & SS_NOFDREF)
589 in6_pcbdetach(inp);
590}
591
592void
593in6_pcbdetach(inp)
594 struct inpcb *inp;
595{
596 struct socket *so = inp->inp_socket;
597 struct inpcbinfo *ipi = inp->inp_pcbinfo;
598
599#ifdef IPSEC
600 if (inp->in6p_sp != NULL)
601 ipsec6_delete_pcbpolicy(inp);
602#endif /* IPSEC */
603 inp->inp_gencnt = ++ipi->ipi_gencnt;
604 in_pcbremlists(inp);
605 sotoinpcb(so) = 0;
606 sofree(so);
607 if (inp->in6p_options)
608 m_freem(inp->in6p_options);
609 if (inp->in6p_outputopts) {
610 if (inp->in6p_outputopts->ip6po_rthdr &&
611 inp->in6p_outputopts->ip6po_route.ro_rt)
612 RTFREE(inp->in6p_outputopts->ip6po_route.ro_rt);
613 if (inp->in6p_outputopts->ip6po_m)
614 (void)m_free(inp->in6p_outputopts->ip6po_m);
615 free(inp->in6p_outputopts, M_IP6OPT);
616 }
617 if (inp->in6p_route.ro_rt)
618 rtfree(inp->in6p_route.ro_rt);
619 ip6_freemoptions(inp->in6p_moptions);
620
621 /* Check and free IPv4 related resources in case of mapped addr */
622 if (inp->inp_options)
623 (void)m_free(inp->inp_options);
624 ip_freemoptions(inp->inp_moptions);
625
626 inp->inp_vflag = 0;
627 zfree(ipi->ipi_zone, inp);
628}
629
630/*
631 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
632 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
633 * in struct pr_usrreqs, so that protocols can just reference then directly
634 * without the need for a wrapper function. The socket must have a valid
635 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
636 * except through a kernel programming error, so it is acceptable to panic
637 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
638 * because there actually /is/ a programming error somewhere... XXX)
639 */
640int
641in6_setsockaddr(so, nam)
642 struct socket *so;
643 struct sockaddr **nam;
644{
645 int s;
646 register struct inpcb *inp;
647 register struct sockaddr_in6 *sin6;
648
649 /*
650 * Do the malloc first in case it blocks.
651 */
652 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
653 bzero(sin6, sizeof *sin6);
654 sin6->sin6_family = AF_INET6;
655 sin6->sin6_len = sizeof(*sin6);
656
657 s = splnet();
658 inp = sotoinpcb(so);
659 if (!inp) {
660 splx(s);
661 free(sin6, M_SONAME);
662 return EINVAL;
663 }
664 sin6->sin6_port = inp->inp_lport;
665 sin6->sin6_addr = inp->in6p_laddr;
666 splx(s);
667 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
668 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
669 else
670 sin6->sin6_scope_id = 0; /*XXX*/
671 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
672 sin6->sin6_addr.s6_addr16[1] = 0;
673
674 *nam = (struct sockaddr *)sin6;
675 return 0;
676}
677
678int
679in6_setpeeraddr(so, nam)
680 struct socket *so;
681 struct sockaddr **nam;
682{
683 int s;
684 struct inpcb *inp;
685 register struct sockaddr_in6 *sin6;
686
687 /*
688 * Do the malloc first in case it blocks.
689 */
690 MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
691 bzero((caddr_t)sin6, sizeof (*sin6));
692 sin6->sin6_family = AF_INET6;
693 sin6->sin6_len = sizeof(struct sockaddr_in6);
694
695 s = splnet();
696 inp = sotoinpcb(so);
697 if (!inp) {
698 splx(s);
699 free(sin6, M_SONAME);
700 return EINVAL;
701 }
702 sin6->sin6_port = inp->inp_fport;
703 sin6->sin6_addr = inp->in6p_faddr;
704 splx(s);
705 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
706 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
707 else
708 sin6->sin6_scope_id = 0; /*XXX*/
709 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
710 sin6->sin6_addr.s6_addr16[1] = 0;
711
712 *nam = (struct sockaddr *)sin6;
713 return 0;
714}
715
716int
717in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
718{
719 struct inpcb *inp = sotoinpcb(so);
720 int error;
721
722 if (inp == NULL)
723 return EINVAL;
724 if (inp->inp_vflag & INP_IPV4) {
725 error = in_setsockaddr(so, nam);
726 if (error == 0)
727 in6_sin_2_v4mapsin6_in_sock(nam);
728 } else
729 error = in6_setsockaddr(so, nam);
730
731 return error;
732}
733
734int
735in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
736{
737 struct inpcb *inp = sotoinpcb(so);
738 int error;
739
740 if (inp == NULL)
741 return EINVAL;
742 if (inp->inp_vflag & INP_IPV4) {
743 error = in_setpeeraddr(so, nam);
744 if (error == 0)
745 in6_sin_2_v4mapsin6_in_sock(nam);
746 } else
747 error = in6_setpeeraddr(so, nam);
748
749 return error;
750}
751
752/*
753 * Pass some notification to all connections of a protocol
754 * associated with address dst. The local address and/or port numbers
755 * may be specified to limit the search. The "usual action" will be
756 * taken, depending on the ctlinput cmd. The caller must filter any
757 * cmds that are uninteresting (e.g., no error in the map).
758 * Call the protocol specific routine (if any) to report
759 * any errors for each matching socket.
760 *
761 * Must be called at splnet.
762 */
763void
764in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify)
765 struct inpcbhead *head;
766 struct sockaddr *dst;
767 u_int fport_arg, lport_arg;
768 struct in6_addr *laddr6;
769 int cmd;
770 void (*notify) __P((struct inpcb *, int));
771{
772 struct inpcb *inp, *ninp;
773 struct in6_addr faddr6;
774 u_short fport = fport_arg, lport = lport_arg;
775 int errno, s;
776 int do_rtchange = (notify == in6_rtchange);
777
778 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6)
779 return;
780 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr;
781 if (IN6_IS_ADDR_UNSPECIFIED(&faddr6))
782 return;
783
784 /*
785 * Redirects go to all references to the destination,
786 * and use in6_rtchange to invalidate the route cache.
787 * Dead host indications: also use in6_rtchange to invalidate
788 * the cache, and deliver the error to all the sockets.
789 * Otherwise, if we have knowledge of the local port and address,
790 * deliver only to that socket.
791 */
792 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
793 fport = 0;
794 lport = 0;
795 bzero((caddr_t)laddr6, sizeof(*laddr6));
796
797 do_rtchange = 1;
798 }
799 errno = inet6ctlerrmap[cmd];
800 s = splnet();
801 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
802 ninp = LIST_NEXT(inp, inp_list);
803
804 if ((inp->inp_vflag & INP_IPV6) == NULL)
805 continue;
806
807 if (do_rtchange) {
808 /*
809 * Since a non-connected PCB might have a cached route,
810 * we always call in6_rtchange without matching
811 * the PCB to the src/dst pair.
812 *
813 * XXX: we assume in6_rtchange does not free the PCB.
814 */
815 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_route.ro_dst.sin6_addr,
816 &faddr6))
817 in6_rtchange(inp, errno);
818
819 if (notify == in6_rtchange)
820 continue; /* there's nothing to do any more */
821 }
822
823 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &faddr6) ||
824 inp->inp_socket == 0 ||
825 (lport && inp->inp_lport != lport) ||
826 (!IN6_IS_ADDR_UNSPECIFIED(laddr6) &&
827 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr6)) ||
828 (fport && inp->inp_fport != fport))
829 continue;
830
831 if (notify)
832 (*notify)(inp, errno);
833 }
834 splx(s);
835}
836
837/*
838 * Lookup a PCB based on the local address and port.
839 */
840struct inpcb *
841in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
842 struct inpcbinfo *pcbinfo;
843 struct in6_addr *laddr;
844 u_int lport_arg;
845 int wild_okay;
846{
847 register struct inpcb *inp;
848 int matchwild = 3, wildcard;
849 u_short lport = lport_arg;
850
851 if (!wild_okay) {
852 struct inpcbhead *head;
853 /*
854 * Look for an unconnected (wildcard foreign addr) PCB that
855 * matches the local address and port we're looking for.
856 */
857 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
858 pcbinfo->hashmask)];
859 LIST_FOREACH(inp, head, inp_hash) {
860 if ((inp->inp_vflag & INP_IPV6) == 0)
861 continue;
862 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
863 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
864 inp->inp_lport == lport) {
865 /*
866 * Found.
867 */
868 return (inp);
869 }
870 }
871 /*
872 * Not found.
873 */
874 return (NULL);
875 } else {
876 struct inpcbporthead *porthash;
877 struct inpcbport *phd;
878 struct inpcb *match = NULL;
879 /*
880 * Best fit PCB lookup.
881 *
882 * First see if this local port is in use by looking on the
883 * port hash list.
884 */
885 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
886 pcbinfo->porthashmask)];
887 LIST_FOREACH(phd, porthash, phd_hash) {
888 if (phd->phd_port == lport)
889 break;
890 }
891 if (phd != NULL) {
892 /*
893 * Port is in use by one or more PCBs. Look for best
894 * fit.
895 */
896 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
897 wildcard = 0;
898 if ((inp->inp_vflag & INP_IPV6) == 0)
899 continue;
900 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
901 wildcard++;
902 if (!IN6_IS_ADDR_UNSPECIFIED(
903 &inp->in6p_laddr)) {
904 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
905 wildcard++;
906 else if (!IN6_ARE_ADDR_EQUAL(
907 &inp->in6p_laddr, laddr))
908 continue;
909 } else {
910 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
911 wildcard++;
912 }
913 if (wildcard < matchwild) {
914 match = inp;
915 matchwild = wildcard;
916 if (matchwild == 0) {
917 break;
918 }
919 }
920 }
921 }
922 return (match);
923 }
924}
925
926/*
927 * Check for alternatives when higher level complains
928 * about service problems. For now, invalidate cached
929 * routing information. If the route was created dynamically
930 * (by a redirect), time to try a default gateway again.
931 */
932void
933in6_losing(in6p)
934 struct inpcb *in6p;
935{
936 struct rtentry *rt;
937 struct rt_addrinfo info;
938
939 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
940 in6p->in6p_route.ro_rt = 0;
941 bzero((caddr_t)&info, sizeof(info));
942 info.rti_info[RTAX_DST] =
943 (struct sockaddr *)&in6p->in6p_route.ro_dst;
944 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
945 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
946 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
947 if (rt->rt_flags & RTF_DYNAMIC)
948 (void)rtrequest(RTM_DELETE, rt_key(rt),
949 rt->rt_gateway, rt_mask(rt), rt->rt_flags,
950 (struct rtentry **)0);
951 else
952 /*
953 * A new route can be allocated
954 * the next time output is attempted.
955 */
956 rtfree(rt);
957 }
958}
959
960/*
961 * After a routing change, flush old routing
962 * and allocate a (hopefully) better one.
963 */
964void
965in6_rtchange(inp, errno)
966 struct inpcb *inp;
967 int errno;
968{
969 if (inp->in6p_route.ro_rt) {
970 rtfree(inp->in6p_route.ro_rt);
971 inp->in6p_route.ro_rt = 0;
972 /*
973 * A new route can be allocated the next time
974 * output is attempted.
975 */
976 }
977}
978
979/*
980 * Lookup PCB in hash list.
981 */
982struct inpcb *
983in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
984 struct inpcbinfo *pcbinfo;
985 struct in6_addr *faddr, *laddr;
986 u_int fport_arg, lport_arg;
987 int wildcard;
988 struct ifnet *ifp;
989{
990 struct inpcbhead *head;
991 register struct inpcb *inp;
992 u_short fport = fport_arg, lport = lport_arg;
993
994 /*
995 * First look for an exact match.
996 */
997 head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */,
998 lport, fport,
999 pcbinfo->hashmask)];
1000 LIST_FOREACH(inp, head, inp_hash) {
1001 if ((inp->inp_vflag & INP_IPV6) == 0)
1002 continue;
1003 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1004 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1005 inp->inp_fport == fport &&
1006 inp->inp_lport == lport) {
1007 /*
1008 * Found.
1009 */
1010 return (inp);
1011 }
1012 }
1013 if (wildcard) {
1014 struct inpcb *local_wild = NULL;
1015
1016 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
1017 pcbinfo->hashmask)];
1018 LIST_FOREACH(inp, head, inp_hash) {
1019 if ((inp->inp_vflag & INP_IPV6) == 0)
1020 continue;
1021 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
1022 inp->inp_lport == lport) {
1023#if defined(NFAITH) && NFAITH > 0
1024 if (ifp && ifp->if_type == IFT_FAITH &&
1025 (inp->inp_flags & INP_FAITH) == 0)
1026 continue;
1027#endif
1028 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
1029 laddr))
1030 return (inp);
1031 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
1032 local_wild = inp;
1033 }
1034 }
1035 return (local_wild);
1036 }
1037
1038 /*
1039 * Not found.
1040 */
1041 return (NULL);
1042}
1043
1044void
1045init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1046{
1047 struct ip6_hdr *ip;
1048
1049 ip = mtod(m, struct ip6_hdr *);
1050 bzero(sin6, sizeof(*sin6));
1051 sin6->sin6_len = sizeof(*sin6);
1052 sin6->sin6_family = AF_INET6;
1053 sin6->sin6_addr = ip->ip6_src;
1054 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1055 sin6->sin6_addr.s6_addr16[1] = 0;
1056 sin6->sin6_scope_id =
1057 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1058 ? m->m_pkthdr.rcvif->if_index : 0;
1059
1060 return;
1061}
2/* $KAME: in6_pcb.c,v 1.8 2000/06/09 00:37:02 itojun 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_ipsec.h"
70
71#include <sys/param.h>
72#include <sys/systm.h>
73#include <sys/malloc.h>
74#include <sys/mbuf.h>
75#include <sys/domain.h>
76#include <sys/protosw.h>
77#include <sys/socket.h>
78#include <sys/socketvar.h>
79#include <sys/sockio.h>
80#include <sys/errno.h>
81#include <sys/time.h>
82#include <sys/proc.h>
83#include <sys/jail.h>
84
85#include <vm/vm_zone.h>
86
87#include <net/if.h>
88#include <net/if_types.h>
89#include <net/route.h>
90
91#include <netinet/in.h>
92#include <netinet/in_var.h>
93#include <netinet/in_systm.h>
94#include <netinet/ip6.h>
95#include <netinet/ip_var.h>
96#include <netinet6/ip6_var.h>
97#include <netinet6/nd6.h>
98#include <netinet/in_pcb.h>
99#include <netinet6/in6_pcb.h>
100
101#include "faith.h"
102
103#ifdef IPSEC
104#include <netinet6/ipsec.h>
105#include <netinet6/ah.h>
106#include <netinet6/ipsec6.h>
107#include <netinet6/ah6.h>
108#include <netkey/key.h>
109#endif /* IPSEC */
110
111struct in6_addr zeroin6_addr;
112
113int
114in6_pcbbind(inp, nam, p)
115 register struct inpcb *inp;
116 struct sockaddr *nam;
117 struct proc *p;
118{
119 struct socket *so = inp->inp_socket;
120 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
121 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
122 u_short lport = 0;
123 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
124
125 if (!in6_ifaddr) /* XXX broken! */
126 return (EADDRNOTAVAIL);
127 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
128 return(EINVAL);
129 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
130 wild = 1;
131 if (nam) {
132 sin6 = (struct sockaddr_in6 *)nam;
133 if (nam->sa_len != sizeof(*sin6))
134 return(EINVAL);
135 /*
136 * family check.
137 */
138 if (nam->sa_family != AF_INET6)
139 return(EAFNOSUPPORT);
140
141 /* KAME hack: embed scopeid */
142 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
143 return EINVAL;
144 /* this must be cleared for ifa_ifwithaddr() */
145 sin6->sin6_scope_id = 0;
146
147 lport = sin6->sin6_port;
148 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
149 /*
150 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
151 * allow compepte duplication of binding if
152 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
153 * and a multicast address is bound on both
154 * new and duplicated sockets.
155 */
156 if (so->so_options & SO_REUSEADDR)
157 reuseport = SO_REUSEADDR|SO_REUSEPORT;
158 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
159 struct ifaddr *ia = NULL;
160
161 sin6->sin6_port = 0; /* yech... */
162 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
163 return(EADDRNOTAVAIL);
164
165 /*
166 * XXX: bind to an anycast address might accidentally
167 * cause sending a packet with anycast source address.
168 */
169 if (ia &&
170 ((struct in6_ifaddr *)ia)->ia6_flags &
171 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
172 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
173 return(EADDRNOTAVAIL);
174 }
175 }
176 if (lport) {
177 struct inpcb *t;
178
179 /* GROSS */
180 if (ntohs(lport) < IPV6PORT_RESERVED && p &&
181 suser_xxx(0, p, PRISON_ROOT))
182 return(EACCES);
183 if (so->so_cred->cr_uid != 0 &&
184 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
185 t = in6_pcblookup_local(pcbinfo,
186 &sin6->sin6_addr, lport,
187 INPLOOKUP_WILDCARD);
188 if (t &&
189 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
190 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
191 (t->inp_socket->so_options &
192 SO_REUSEPORT) == 0) &&
193 (so->so_cred->cr_uid !=
194 t->inp_socket->so_cred->cr_uid))
195 return (EADDRINUSE);
196 if (ip6_mapped_addr_on != 0 &&
197 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
198 struct sockaddr_in sin;
199
200 in6_sin6_2_sin(&sin, sin6);
201 t = in_pcblookup_local(pcbinfo,
202 sin.sin_addr, lport,
203 INPLOOKUP_WILDCARD);
204 if (t &&
205 (so->so_cred->cr_uid !=
206 t->inp_socket->so_cred->cr_uid) &&
207 (ntohl(t->inp_laddr.s_addr) !=
208 INADDR_ANY ||
209 INP_SOCKAF(so) ==
210 INP_SOCKAF(t->inp_socket)))
211 return (EADDRINUSE);
212 }
213 }
214 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
215 lport, wild);
216 if (t && (reuseport & t->inp_socket->so_options) == 0)
217 return(EADDRINUSE);
218 if (ip6_mapped_addr_on != 0 &&
219 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
220 struct sockaddr_in sin;
221
222 in6_sin6_2_sin(&sin, sin6);
223 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
224 lport, wild);
225 if (t &&
226 (reuseport & t->inp_socket->so_options)
227 == 0 &&
228 (ntohl(t->inp_laddr.s_addr)
229 != INADDR_ANY ||
230 INP_SOCKAF(so) ==
231 INP_SOCKAF(t->inp_socket)))
232 return (EADDRINUSE);
233 }
234 }
235 inp->in6p_laddr = sin6->sin6_addr;
236 }
237 if (lport == 0) {
238 int e;
239 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, p)) != 0)
240 return(e);
241 }
242 else {
243 inp->inp_lport = lport;
244 if (in_pcbinshash(inp) != 0) {
245 inp->in6p_laddr = in6addr_any;
246 inp->inp_lport = 0;
247 return (EAGAIN);
248 }
249 }
250 inp->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/
251 return(0);
252}
253
254/*
255 * Transform old in6_pcbconnect() into an inner subroutine for new
256 * in6_pcbconnect(): Do some validity-checking on the remote
257 * address (in mbuf 'nam') and then determine local host address
258 * (i.e., which interface) to use to access that remote host.
259 *
260 * This preserves definition of in6_pcbconnect(), while supporting a
261 * slightly different version for T/TCP. (This is more than
262 * a bit of a kludge, but cleaning up the internal interfaces would
263 * have forced minor changes in every protocol).
264 */
265
266int
267in6_pcbladdr(inp, nam, plocal_addr6)
268 register struct inpcb *inp;
269 struct sockaddr *nam;
270 struct in6_addr **plocal_addr6;
271{
272 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
273 struct in6_pktinfo *pi;
274 struct ifnet *ifp = NULL;
275 int error = 0;
276
277 if (nam->sa_len != sizeof (*sin6))
278 return (EINVAL);
279 if (sin6->sin6_family != AF_INET6)
280 return (EAFNOSUPPORT);
281 if (sin6->sin6_port == 0)
282 return (EADDRNOTAVAIL);
283
284 /* KAME hack: embed scopeid */
285 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
286 return EINVAL;
287
288 if (in6_ifaddr) {
289 /*
290 * If the destination address is UNSPECIFIED addr,
291 * use the loopback addr, e.g ::1.
292 */
293 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
294 sin6->sin6_addr = in6addr_loopback;
295 }
296 {
297 /*
298 * XXX: in6_selectsrc might replace the bound local address
299 * with the address specified by setsockopt(IPV6_PKTINFO).
300 * Is it the intended behavior?
301 */
302 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
303 inp->in6p_moptions,
304 &inp->in6p_route,
305 &inp->in6p_laddr, &error);
306 if (*plocal_addr6 == 0) {
307 if (error == 0)
308 error = EADDRNOTAVAIL;
309 return(error);
310 }
311 /*
312 * Don't do pcblookup call here; return interface in
313 * plocal_addr6
314 * and exit to caller, that will do the lookup.
315 */
316 }
317
318 if (inp->in6p_route.ro_rt)
319 ifp = inp->in6p_route.ro_rt->rt_ifp;
320
321 return(0);
322}
323
324/*
325 * Outer subroutine:
326 * Connect from a socket to a specified address.
327 * Both address and port must be specified in argument sin.
328 * If don't have a local address for this socket yet,
329 * then pick one.
330 */
331int
332in6_pcbconnect(inp, nam, p)
333 register struct inpcb *inp;
334 struct sockaddr *nam;
335 struct proc *p;
336{
337 struct in6_addr *addr6;
338 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
339 int error;
340
341 /*
342 * Call inner routine, to assign local interface address.
343 */
344 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
345 return(error);
346
347 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
348 sin6->sin6_port,
349 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
350 ? addr6 : &inp->in6p_laddr,
351 inp->inp_lport, 0, NULL) != NULL) {
352 return (EADDRINUSE);
353 }
354 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
355 if (inp->inp_lport == 0) {
356 error = in6_pcbbind(inp, (struct sockaddr *)0, p);
357 if (error)
358 return (error);
359 }
360 inp->in6p_laddr = *addr6;
361 }
362 inp->in6p_faddr = sin6->sin6_addr;
363 inp->inp_fport = sin6->sin6_port;
364 /*
365 * xxx kazu flowlabel is necessary for connect?
366 * but if this line is missing, the garbage value remains.
367 */
368 inp->in6p_flowinfo = sin6->sin6_flowinfo;
369 if ((inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) == 0 &&
370 ip6_auto_flowlabel != 0)
371 inp->in6p_flowinfo |=
372 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
373
374 in_pcbrehash(inp);
375 return (0);
376}
377
378#if 0
379/*
380 * Return an IPv6 address, which is the most appropriate for given
381 * destination and user specified options.
382 * If necessary, this function lookups the routing table and return
383 * an entry to the caller for later use.
384 */
385struct in6_addr *
386in6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp)
387 struct sockaddr_in6 *dstsock;
388 struct ip6_pktopts *opts;
389 struct ip6_moptions *mopts;
390 struct route_in6 *ro;
391 struct in6_addr *laddr;
392 int *errorp;
393{
394 struct in6_addr *dst;
395 struct in6_ifaddr *ia6 = 0;
396 struct in6_pktinfo *pi = NULL;
397
398 dst = &dstsock->sin6_addr;
399 *errorp = 0;
400
401 /*
402 * If the source address is explicitly specified by the caller,
403 * use it.
404 */
405 if (opts && (pi = opts->ip6po_pktinfo) &&
406 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr))
407 return(&pi->ipi6_addr);
408
409 /*
410 * If the source address is not specified but the socket(if any)
411 * is already bound, use the bound address.
412 */
413 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr))
414 return(laddr);
415
416 /*
417 * If the caller doesn't specify the source address but
418 * the outgoing interface, use an address associated with
419 * the interface.
420 */
421 if (pi && pi->ipi6_ifindex) {
422 /* XXX boundary check is assumed to be already done. */
423 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
424 dst);
425 if (ia6 == 0) {
426 *errorp = EADDRNOTAVAIL;
427 return(0);
428 }
429 return(&satosin6(&ia6->ia_addr)->sin6_addr);
430 }
431
432 /*
433 * If the destination address is a link-local unicast address or
434 * a multicast address, and if the outgoing interface is specified
435 * by the sin6_scope_id filed, use an address associated with the
436 * interface.
437 * XXX: We're now trying to define more specific semantics of
438 * sin6_scope_id field, so this part will be rewritten in
439 * the near future.
440 */
441 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
442 dstsock->sin6_scope_id) {
443 /*
444 * I'm not sure if boundary check for scope_id is done
445 * somewhere...
446 */
447 if (dstsock->sin6_scope_id < 0 ||
448 if_index < dstsock->sin6_scope_id) {
449 *errorp = ENXIO; /* XXX: better error? */
450 return(0);
451 }
452 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
453 dst);
454 if (ia6 == 0) {
455 *errorp = EADDRNOTAVAIL;
456 return(0);
457 }
458 return(&satosin6(&ia6->ia_addr)->sin6_addr);
459 }
460
461 /*
462 * If the destination address is a multicast address and
463 * the outgoing interface for the address is specified
464 * by the caller, use an address associated with the interface.
465 * There is a sanity check here; if the destination has node-local
466 * scope, the outgoing interfacde should be a loopback address.
467 * Even if the outgoing interface is not specified, we also
468 * choose a loopback interface as the outgoing interface.
469 */
470 if (IN6_IS_ADDR_MULTICAST(dst)) {
471 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
472
473 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
474 ifp = &loif[0];
475 }
476
477 if (ifp) {
478 ia6 = in6_ifawithscope(ifp, dst);
479 if (ia6 == 0) {
480 *errorp = EADDRNOTAVAIL;
481 return(0);
482 }
483 return(&ia6->ia_addr.sin6_addr);
484 }
485 }
486
487 /*
488 * If the next hop address for the packet is specified
489 * by caller, use an address associated with the route
490 * to the next hop.
491 */
492 {
493 struct sockaddr_in6 *sin6_next;
494 struct rtentry *rt;
495
496 if (opts && opts->ip6po_nexthop) {
497 sin6_next = satosin6(opts->ip6po_nexthop);
498 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
499 if (rt) {
500 ia6 = in6_ifawithscope(rt->rt_ifp, dst);
501 if (ia6 == 0)
502 ia6 = ifatoia6(rt->rt_ifa);
503 }
504 if (ia6 == 0) {
505 *errorp = EADDRNOTAVAIL;
506 return(0);
507 }
508 return(&satosin6(&ia6->ia_addr)->sin6_addr);
509 }
510 }
511
512 /*
513 * If route is known or can be allocated now,
514 * our src addr is taken from the i/f, else punt.
515 */
516 if (ro) {
517 if (ro->ro_rt &&
518 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
519 RTFREE(ro->ro_rt);
520 ro->ro_rt = (struct rtentry *)0;
521 }
522 if (ro->ro_rt == (struct rtentry *)0 ||
523 ro->ro_rt->rt_ifp == (struct ifnet *)0) {
524 /* No route yet, so try to acquire one */
525 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
526 ro->ro_dst.sin6_family = AF_INET6;
527 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6);
528 ro->ro_dst.sin6_addr = *dst;
529 if (IN6_IS_ADDR_MULTICAST(dst)) {
530 ro->ro_rt = rtalloc1(&((struct route *)ro)
531 ->ro_dst, 0, 0UL);
532 } else {
533 rtalloc((struct route *)ro);
534 }
535 }
536
537 /*
538 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
539 * the address. But we don't know why it does so.
540 * It is necessary to ensure the scope even for lo0
541 * so doesn't check out IFF_LOOPBACK.
542 */
543
544 if (ro->ro_rt) {
545 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
546 if (ia6 == 0) /* xxx scope error ?*/
547 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
548 }
549 if (ia6 == 0) {
550 *errorp = EHOSTUNREACH; /* no route */
551 return(0);
552 }
553 return(&satosin6(&ia6->ia_addr)->sin6_addr);
554 }
555
556 *errorp = EADDRNOTAVAIL;
557 return(0);
558}
559
560/*
561 * Default hop limit selection. The precedence is as follows:
562 * 1. Hoplimit valued specified via ioctl.
563 * 2. (If the outgoing interface is detected) the current
564 * hop limit of the interface specified by router advertisement.
565 * 3. The system default hoplimit.
566*/
567int
568in6_selecthlim(in6p, ifp)
569 struct in6pcb *in6p;
570 struct ifnet *ifp;
571{
572 if (in6p && in6p->in6p_hops >= 0)
573 return(in6p->in6p_hops);
574 else if (ifp)
575 return(nd_ifinfo[ifp->if_index].chlim);
576 else
577 return(ip6_defhlim);
578}
579#endif
580
581void
582in6_pcbdisconnect(inp)
583 struct inpcb *inp;
584{
585 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
586 inp->inp_fport = 0;
587 in_pcbrehash(inp);
588 if (inp->inp_socket->so_state & SS_NOFDREF)
589 in6_pcbdetach(inp);
590}
591
592void
593in6_pcbdetach(inp)
594 struct inpcb *inp;
595{
596 struct socket *so = inp->inp_socket;
597 struct inpcbinfo *ipi = inp->inp_pcbinfo;
598
599#ifdef IPSEC
600 if (inp->in6p_sp != NULL)
601 ipsec6_delete_pcbpolicy(inp);
602#endif /* IPSEC */
603 inp->inp_gencnt = ++ipi->ipi_gencnt;
604 in_pcbremlists(inp);
605 sotoinpcb(so) = 0;
606 sofree(so);
607 if (inp->in6p_options)
608 m_freem(inp->in6p_options);
609 if (inp->in6p_outputopts) {
610 if (inp->in6p_outputopts->ip6po_rthdr &&
611 inp->in6p_outputopts->ip6po_route.ro_rt)
612 RTFREE(inp->in6p_outputopts->ip6po_route.ro_rt);
613 if (inp->in6p_outputopts->ip6po_m)
614 (void)m_free(inp->in6p_outputopts->ip6po_m);
615 free(inp->in6p_outputopts, M_IP6OPT);
616 }
617 if (inp->in6p_route.ro_rt)
618 rtfree(inp->in6p_route.ro_rt);
619 ip6_freemoptions(inp->in6p_moptions);
620
621 /* Check and free IPv4 related resources in case of mapped addr */
622 if (inp->inp_options)
623 (void)m_free(inp->inp_options);
624 ip_freemoptions(inp->inp_moptions);
625
626 inp->inp_vflag = 0;
627 zfree(ipi->ipi_zone, inp);
628}
629
630/*
631 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
632 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
633 * in struct pr_usrreqs, so that protocols can just reference then directly
634 * without the need for a wrapper function. The socket must have a valid
635 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
636 * except through a kernel programming error, so it is acceptable to panic
637 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
638 * because there actually /is/ a programming error somewhere... XXX)
639 */
640int
641in6_setsockaddr(so, nam)
642 struct socket *so;
643 struct sockaddr **nam;
644{
645 int s;
646 register struct inpcb *inp;
647 register struct sockaddr_in6 *sin6;
648
649 /*
650 * Do the malloc first in case it blocks.
651 */
652 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
653 bzero(sin6, sizeof *sin6);
654 sin6->sin6_family = AF_INET6;
655 sin6->sin6_len = sizeof(*sin6);
656
657 s = splnet();
658 inp = sotoinpcb(so);
659 if (!inp) {
660 splx(s);
661 free(sin6, M_SONAME);
662 return EINVAL;
663 }
664 sin6->sin6_port = inp->inp_lport;
665 sin6->sin6_addr = inp->in6p_laddr;
666 splx(s);
667 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
668 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
669 else
670 sin6->sin6_scope_id = 0; /*XXX*/
671 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
672 sin6->sin6_addr.s6_addr16[1] = 0;
673
674 *nam = (struct sockaddr *)sin6;
675 return 0;
676}
677
678int
679in6_setpeeraddr(so, nam)
680 struct socket *so;
681 struct sockaddr **nam;
682{
683 int s;
684 struct inpcb *inp;
685 register struct sockaddr_in6 *sin6;
686
687 /*
688 * Do the malloc first in case it blocks.
689 */
690 MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
691 bzero((caddr_t)sin6, sizeof (*sin6));
692 sin6->sin6_family = AF_INET6;
693 sin6->sin6_len = sizeof(struct sockaddr_in6);
694
695 s = splnet();
696 inp = sotoinpcb(so);
697 if (!inp) {
698 splx(s);
699 free(sin6, M_SONAME);
700 return EINVAL;
701 }
702 sin6->sin6_port = inp->inp_fport;
703 sin6->sin6_addr = inp->in6p_faddr;
704 splx(s);
705 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
706 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
707 else
708 sin6->sin6_scope_id = 0; /*XXX*/
709 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
710 sin6->sin6_addr.s6_addr16[1] = 0;
711
712 *nam = (struct sockaddr *)sin6;
713 return 0;
714}
715
716int
717in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
718{
719 struct inpcb *inp = sotoinpcb(so);
720 int error;
721
722 if (inp == NULL)
723 return EINVAL;
724 if (inp->inp_vflag & INP_IPV4) {
725 error = in_setsockaddr(so, nam);
726 if (error == 0)
727 in6_sin_2_v4mapsin6_in_sock(nam);
728 } else
729 error = in6_setsockaddr(so, nam);
730
731 return error;
732}
733
734int
735in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
736{
737 struct inpcb *inp = sotoinpcb(so);
738 int error;
739
740 if (inp == NULL)
741 return EINVAL;
742 if (inp->inp_vflag & INP_IPV4) {
743 error = in_setpeeraddr(so, nam);
744 if (error == 0)
745 in6_sin_2_v4mapsin6_in_sock(nam);
746 } else
747 error = in6_setpeeraddr(so, nam);
748
749 return error;
750}
751
752/*
753 * Pass some notification to all connections of a protocol
754 * associated with address dst. The local address and/or port numbers
755 * may be specified to limit the search. The "usual action" will be
756 * taken, depending on the ctlinput cmd. The caller must filter any
757 * cmds that are uninteresting (e.g., no error in the map).
758 * Call the protocol specific routine (if any) to report
759 * any errors for each matching socket.
760 *
761 * Must be called at splnet.
762 */
763void
764in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify)
765 struct inpcbhead *head;
766 struct sockaddr *dst;
767 u_int fport_arg, lport_arg;
768 struct in6_addr *laddr6;
769 int cmd;
770 void (*notify) __P((struct inpcb *, int));
771{
772 struct inpcb *inp, *ninp;
773 struct in6_addr faddr6;
774 u_short fport = fport_arg, lport = lport_arg;
775 int errno, s;
776 int do_rtchange = (notify == in6_rtchange);
777
778 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6)
779 return;
780 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr;
781 if (IN6_IS_ADDR_UNSPECIFIED(&faddr6))
782 return;
783
784 /*
785 * Redirects go to all references to the destination,
786 * and use in6_rtchange to invalidate the route cache.
787 * Dead host indications: also use in6_rtchange to invalidate
788 * the cache, and deliver the error to all the sockets.
789 * Otherwise, if we have knowledge of the local port and address,
790 * deliver only to that socket.
791 */
792 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
793 fport = 0;
794 lport = 0;
795 bzero((caddr_t)laddr6, sizeof(*laddr6));
796
797 do_rtchange = 1;
798 }
799 errno = inet6ctlerrmap[cmd];
800 s = splnet();
801 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
802 ninp = LIST_NEXT(inp, inp_list);
803
804 if ((inp->inp_vflag & INP_IPV6) == NULL)
805 continue;
806
807 if (do_rtchange) {
808 /*
809 * Since a non-connected PCB might have a cached route,
810 * we always call in6_rtchange without matching
811 * the PCB to the src/dst pair.
812 *
813 * XXX: we assume in6_rtchange does not free the PCB.
814 */
815 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_route.ro_dst.sin6_addr,
816 &faddr6))
817 in6_rtchange(inp, errno);
818
819 if (notify == in6_rtchange)
820 continue; /* there's nothing to do any more */
821 }
822
823 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &faddr6) ||
824 inp->inp_socket == 0 ||
825 (lport && inp->inp_lport != lport) ||
826 (!IN6_IS_ADDR_UNSPECIFIED(laddr6) &&
827 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr6)) ||
828 (fport && inp->inp_fport != fport))
829 continue;
830
831 if (notify)
832 (*notify)(inp, errno);
833 }
834 splx(s);
835}
836
837/*
838 * Lookup a PCB based on the local address and port.
839 */
840struct inpcb *
841in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
842 struct inpcbinfo *pcbinfo;
843 struct in6_addr *laddr;
844 u_int lport_arg;
845 int wild_okay;
846{
847 register struct inpcb *inp;
848 int matchwild = 3, wildcard;
849 u_short lport = lport_arg;
850
851 if (!wild_okay) {
852 struct inpcbhead *head;
853 /*
854 * Look for an unconnected (wildcard foreign addr) PCB that
855 * matches the local address and port we're looking for.
856 */
857 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
858 pcbinfo->hashmask)];
859 LIST_FOREACH(inp, head, inp_hash) {
860 if ((inp->inp_vflag & INP_IPV6) == 0)
861 continue;
862 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
863 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
864 inp->inp_lport == lport) {
865 /*
866 * Found.
867 */
868 return (inp);
869 }
870 }
871 /*
872 * Not found.
873 */
874 return (NULL);
875 } else {
876 struct inpcbporthead *porthash;
877 struct inpcbport *phd;
878 struct inpcb *match = NULL;
879 /*
880 * Best fit PCB lookup.
881 *
882 * First see if this local port is in use by looking on the
883 * port hash list.
884 */
885 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
886 pcbinfo->porthashmask)];
887 LIST_FOREACH(phd, porthash, phd_hash) {
888 if (phd->phd_port == lport)
889 break;
890 }
891 if (phd != NULL) {
892 /*
893 * Port is in use by one or more PCBs. Look for best
894 * fit.
895 */
896 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
897 wildcard = 0;
898 if ((inp->inp_vflag & INP_IPV6) == 0)
899 continue;
900 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
901 wildcard++;
902 if (!IN6_IS_ADDR_UNSPECIFIED(
903 &inp->in6p_laddr)) {
904 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
905 wildcard++;
906 else if (!IN6_ARE_ADDR_EQUAL(
907 &inp->in6p_laddr, laddr))
908 continue;
909 } else {
910 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
911 wildcard++;
912 }
913 if (wildcard < matchwild) {
914 match = inp;
915 matchwild = wildcard;
916 if (matchwild == 0) {
917 break;
918 }
919 }
920 }
921 }
922 return (match);
923 }
924}
925
926/*
927 * Check for alternatives when higher level complains
928 * about service problems. For now, invalidate cached
929 * routing information. If the route was created dynamically
930 * (by a redirect), time to try a default gateway again.
931 */
932void
933in6_losing(in6p)
934 struct inpcb *in6p;
935{
936 struct rtentry *rt;
937 struct rt_addrinfo info;
938
939 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
940 in6p->in6p_route.ro_rt = 0;
941 bzero((caddr_t)&info, sizeof(info));
942 info.rti_info[RTAX_DST] =
943 (struct sockaddr *)&in6p->in6p_route.ro_dst;
944 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
945 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
946 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
947 if (rt->rt_flags & RTF_DYNAMIC)
948 (void)rtrequest(RTM_DELETE, rt_key(rt),
949 rt->rt_gateway, rt_mask(rt), rt->rt_flags,
950 (struct rtentry **)0);
951 else
952 /*
953 * A new route can be allocated
954 * the next time output is attempted.
955 */
956 rtfree(rt);
957 }
958}
959
960/*
961 * After a routing change, flush old routing
962 * and allocate a (hopefully) better one.
963 */
964void
965in6_rtchange(inp, errno)
966 struct inpcb *inp;
967 int errno;
968{
969 if (inp->in6p_route.ro_rt) {
970 rtfree(inp->in6p_route.ro_rt);
971 inp->in6p_route.ro_rt = 0;
972 /*
973 * A new route can be allocated the next time
974 * output is attempted.
975 */
976 }
977}
978
979/*
980 * Lookup PCB in hash list.
981 */
982struct inpcb *
983in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
984 struct inpcbinfo *pcbinfo;
985 struct in6_addr *faddr, *laddr;
986 u_int fport_arg, lport_arg;
987 int wildcard;
988 struct ifnet *ifp;
989{
990 struct inpcbhead *head;
991 register struct inpcb *inp;
992 u_short fport = fport_arg, lport = lport_arg;
993
994 /*
995 * First look for an exact match.
996 */
997 head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */,
998 lport, fport,
999 pcbinfo->hashmask)];
1000 LIST_FOREACH(inp, head, inp_hash) {
1001 if ((inp->inp_vflag & INP_IPV6) == 0)
1002 continue;
1003 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1004 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1005 inp->inp_fport == fport &&
1006 inp->inp_lport == lport) {
1007 /*
1008 * Found.
1009 */
1010 return (inp);
1011 }
1012 }
1013 if (wildcard) {
1014 struct inpcb *local_wild = NULL;
1015
1016 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
1017 pcbinfo->hashmask)];
1018 LIST_FOREACH(inp, head, inp_hash) {
1019 if ((inp->inp_vflag & INP_IPV6) == 0)
1020 continue;
1021 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
1022 inp->inp_lport == lport) {
1023#if defined(NFAITH) && NFAITH > 0
1024 if (ifp && ifp->if_type == IFT_FAITH &&
1025 (inp->inp_flags & INP_FAITH) == 0)
1026 continue;
1027#endif
1028 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
1029 laddr))
1030 return (inp);
1031 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
1032 local_wild = inp;
1033 }
1034 }
1035 return (local_wild);
1036 }
1037
1038 /*
1039 * Not found.
1040 */
1041 return (NULL);
1042}
1043
1044void
1045init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1046{
1047 struct ip6_hdr *ip;
1048
1049 ip = mtod(m, struct ip6_hdr *);
1050 bzero(sin6, sizeof(*sin6));
1051 sin6->sin6_len = sizeof(*sin6);
1052 sin6->sin6_family = AF_INET6;
1053 sin6->sin6_addr = ip->ip6_src;
1054 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1055 sin6->sin6_addr.s6_addr16[1] = 0;
1056 sin6->sin6_scope_id =
1057 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1058 ? m->m_pkthdr.rcvif->if_index : 0;
1059
1060 return;
1061}