1/*-
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: head/sys/netinet6/raw_ip6.c 171259 2007-07-05 16:23:49Z delphij $
30 */
31
32/*-
33 * Copyright (c) 1982, 1986, 1988, 1993
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 4. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
61 */
62
63#include "opt_ipsec.h"
64#include "opt_inet6.h"
65
66#include <sys/param.h>
67#include <sys/errno.h>
68#include <sys/lock.h>
69#include <sys/malloc.h>
70#include <sys/mbuf.h>
71#include <sys/priv.h>
72#include <sys/proc.h>
73#include <sys/protosw.h>
74#include <sys/signalvar.h>
75#include <sys/socket.h>
76#include <sys/socketvar.h>
77#include <sys/sx.h>
78#include <sys/syslog.h>
79
80#include <net/if.h>
81#include <net/if_types.h>
82#include <net/route.h>
83
84#include <netinet/in.h>
85#include <netinet/in_var.h>
86#include <netinet/in_systm.h>
87#include <netinet/icmp6.h>
88#include <netinet/in_pcb.h>
89#include <netinet/ip6.h>
90#include <netinet6/ip6protosw.h>
91#include <netinet6/ip6_mroute.h>
92#include <netinet6/in6_pcb.h>
93#include <netinet6/ip6_var.h>
94#include <netinet6/nd6.h>
95#include <netinet6/raw_ip6.h>
96#include <netinet6/scope6_var.h>
97
98#ifdef IPSEC
99#include <netipsec/ipsec.h>
100#include <netipsec/ipsec6.h>
101#endif /* IPSEC */
102
103#include <machine/stdarg.h>
104
105#define satosin6(sa) ((struct sockaddr_in6 *)(sa))
106#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
107
108/*
109 * Raw interface to IP6 protocol.
110 */
111
112extern struct inpcbhead ripcb;
113extern struct inpcbinfo ripcbinfo;
114extern u_long rip_sendspace;
115extern u_long rip_recvspace;
116
117struct rip6stat rip6stat;
118
119/*
120 * Hooks for multicast forwarding.
121 */
122struct socket *ip6_mrouter = NULL;
123int (*ip6_mrouter_set)(struct socket *, struct sockopt *);
124int (*ip6_mrouter_get)(struct socket *, struct sockopt *);
125int (*ip6_mrouter_done)(void);
126int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *);
127int (*mrt6_ioctl)(int, caddr_t);
128
129/*
130 * Setup generic address and protocol structures
131 * for raw_input routine, then pass them along with
132 * mbuf chain.
133 */
134int
135rip6_input(struct mbuf **mp, int *offp, int proto)
136{
137 struct mbuf *m = *mp;
138 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
139 register struct inpcb *in6p;
140 struct inpcb *last = 0;
141 struct mbuf *opts = NULL;
142 struct sockaddr_in6 fromsa;
143
144 rip6stat.rip6s_ipackets++;
145
146 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
147 /* XXX send icmp6 host/port unreach? */
148 m_freem(m);
149 return IPPROTO_DONE;
150 }
151
152 init_sin6(&fromsa, m); /* general init */
153
154 INP_INFO_RLOCK(&ripcbinfo);
155 LIST_FOREACH(in6p, &ripcb, inp_list) {
156 INP_LOCK(in6p);
157 if ((in6p->in6p_vflag & INP_IPV6) == 0) {
158docontinue:
159 INP_UNLOCK(in6p);
160 continue;
161 }
162 if (in6p->in6p_ip6_nxt &&
163 in6p->in6p_ip6_nxt != proto)
164 goto docontinue;
165 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
166 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
167 goto docontinue;
168 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
169 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
170 goto docontinue;
171 if (in6p->in6p_cksum != -1) {
172 rip6stat.rip6s_isum++;
173 if (in6_cksum(m, proto, *offp,
174 m->m_pkthdr.len - *offp)) {
175 rip6stat.rip6s_badsum++;
176 goto docontinue;
177 }
178 }
179 if (last) {
180 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
181
182#ifdef IPSEC
183 /*
184 * Check AH/ESP integrity.
185 */
186 if (n && ipsec6_in_reject(n, last)) {
187 m_freem(n);
188 ipsec6stat.in_polvio++;
189 /* do not inject data into pcb */
190 } else
191#endif /* IPSEC */
192 if (n) {
193 if (last->in6p_flags & IN6P_CONTROLOPTS ||
194 last->in6p_socket->so_options & SO_TIMESTAMP)
195 ip6_savecontrol(last, n, &opts);
196 /* strip intermediate headers */
197 m_adj(n, *offp);
198 if (sbappendaddr(&last->in6p_socket->so_rcv,
199 (struct sockaddr *)&fromsa,
200 n, opts) == 0) {
201 m_freem(n);
202 if (opts)
203 m_freem(opts);
204 rip6stat.rip6s_fullsock++;
205 } else
206 sorwakeup(last->in6p_socket);
207 opts = NULL;
208 }
209 INP_UNLOCK(last);
210 }
211 last = in6p;
212 }
213#ifdef IPSEC
214 /*
215 * Check AH/ESP integrity.
216 */
217 if (last && ipsec6_in_reject(m, last)) {
218 m_freem(m);
219 ipsec6stat.in_polvio++;
220 ip6stat.ip6s_delivered--;
221 /* do not inject data into pcb */
222 INP_UNLOCK(last);
223 } else
224#endif /* IPSEC */
225 if (last) {
226 if (last->in6p_flags & IN6P_CONTROLOPTS ||
227 last->in6p_socket->so_options & SO_TIMESTAMP)
228 ip6_savecontrol(last, m, &opts);
229 /* strip intermediate headers */
230 m_adj(m, *offp);
231 if (sbappendaddr(&last->in6p_socket->so_rcv,
232 (struct sockaddr *)&fromsa, m, opts) == 0) {
233 m_freem(m);
234 if (opts)
235 m_freem(opts);
236 rip6stat.rip6s_fullsock++;
237 } else
238 sorwakeup(last->in6p_socket);
239 INP_UNLOCK(last);
240 } else {
241 rip6stat.rip6s_nosock++;
242 if (m->m_flags & M_MCAST)
243 rip6stat.rip6s_nosockmcast++;
244 if (proto == IPPROTO_NONE)
245 m_freem(m);
246 else {
247 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
248 icmp6_error(m, ICMP6_PARAM_PROB,
249 ICMP6_PARAMPROB_NEXTHEADER,
250 prvnxtp - mtod(m, char *));
251 }
252 ip6stat.ip6s_delivered--;
253 }
254 INP_INFO_RUNLOCK(&ripcbinfo);
255 return IPPROTO_DONE;
256}
257
258void
259rip6_ctlinput(int cmd, struct sockaddr *sa, void *d)
260{
261 struct ip6_hdr *ip6;
262 struct mbuf *m;
263 int off = 0;
264 struct ip6ctlparam *ip6cp = NULL;
265 const struct sockaddr_in6 *sa6_src = NULL;
266 void *cmdarg;
267 struct inpcb *(*notify) __P((struct inpcb *, int)) = in6_rtchange;
268
269 if (sa->sa_family != AF_INET6 ||
270 sa->sa_len != sizeof(struct sockaddr_in6))
271 return;
272
273 if ((unsigned)cmd >= PRC_NCMDS)
274 return;
275 if (PRC_IS_REDIRECT(cmd))
276 notify = in6_rtchange, d = NULL;
277 else if (cmd == PRC_HOSTDEAD)
278 d = NULL;
279 else if (inet6ctlerrmap[cmd] == 0)
280 return;
281
282 /* if the parameter is from icmp6, decode it. */
283 if (d != NULL) {
284 ip6cp = (struct ip6ctlparam *)d;
285 m = ip6cp->ip6c_m;
286 ip6 = ip6cp->ip6c_ip6;
287 off = ip6cp->ip6c_off;
288 cmdarg = ip6cp->ip6c_cmdarg;
289 sa6_src = ip6cp->ip6c_src;
290 } else {
291 m = NULL;
292 ip6 = NULL;
293 cmdarg = NULL;
294 sa6_src = &sa6_any;
295 }
296
297 (void) in6_pcbnotify(&ripcbinfo, sa, 0,
298 (const struct sockaddr *)sa6_src,
299 0, cmd, cmdarg, notify);
300}
301
302/*
303 * Generate IPv6 header and pass packet to ip6_output.
304 * Tack on options user may have setup with control call.
305 */
306int
307#if __STDC__
308rip6_output(struct mbuf *m, ...)
309#else
310rip6_output(m, va_alist)
311 struct mbuf *m;
312 va_dcl
313#endif
314{
315 struct mbuf *control;
316 struct socket *so;
317 struct sockaddr_in6 *dstsock;
318 struct in6_addr *dst;
319 struct ip6_hdr *ip6;
320 struct inpcb *in6p;
321 u_int plen = m->m_pkthdr.len;
322 int error = 0;
323 struct ip6_pktopts opt, *optp;
324 struct ifnet *oifp = NULL;
325 int type = 0, code = 0; /* for ICMPv6 output statistics only */
326 int priv = 0;
327 int scope_ambiguous = 0;
328 struct in6_addr *in6a;
329 va_list ap;
330
331 va_start(ap, m);
332 so = va_arg(ap, struct socket *);
333 dstsock = va_arg(ap, struct sockaddr_in6 *);
334 control = va_arg(ap, struct mbuf *);
335 va_end(ap);
336
337 in6p = sotoin6pcb(so);
338 INP_LOCK(in6p);
339
340 priv = 0;
341 if (suser_cred(so->so_cred, 0) == 0)
342 priv = 1;
343 dst = &dstsock->sin6_addr;
344 if (control) {
345 if ((error = ip6_setpktopts(control, &opt,
346 in6p->in6p_outputopts, priv, so->so_proto->pr_protocol))
347 != 0) {
348 goto bad;
349 }
350 optp = &opt;
351 } else
352 optp = in6p->in6p_outputopts;
353
354 /*
355 * Check and convert scope zone ID into internal form.
356 * XXX: we may still need to determine the zone later.
357 */
358 if (!(so->so_state & SS_ISCONNECTED)) {
359 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone)
360 scope_ambiguous = 1;
361 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0)
362 goto bad;
363 }
364
365 /*
366 * For an ICMPv6 packet, we should know its type and code
367 * to update statistics.
368 */
369 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
370 struct icmp6_hdr *icmp6;
371 if (m->m_len < sizeof(struct icmp6_hdr) &&
372 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
373 error = ENOBUFS;
374 goto bad;
375 }
376 icmp6 = mtod(m, struct icmp6_hdr *);
377 type = icmp6->icmp6_type;
378 code = icmp6->icmp6_code;
379 }
380
381 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT);
382 if (m == NULL) {
383 error = ENOBUFS;
384 goto bad;
385 }
386 ip6 = mtod(m, struct ip6_hdr *);
387
388 /*
389 * Source address selection.
390 */
391 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, NULL,
392 &in6p->in6p_laddr, &oifp, &error)) == NULL) {
393 if (error == 0)
394 error = EADDRNOTAVAIL;
395 goto bad;
396 }
397 ip6->ip6_src = *in6a;
398
399 if (oifp && scope_ambiguous) {
400 /*
401 * Application should provide a proper zone ID or the use of
402 * default zone IDs should be enabled. Unfortunately, some
403 * applications do not behave as it should, so we need a
404 * workaround. Even if an appropriate ID is not determined
405 * (when it's required), if we can determine the outgoing
406 * interface. determine the zone ID based on the interface.
407 */
408 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL);
409 if (error != 0)
410 goto bad;
411 }
412 ip6->ip6_dst = dstsock->sin6_addr;
413
414 /* fill in the rest of the IPv6 header fields */
415 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
416 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
417 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
418 (IPV6_VERSION & IPV6_VERSION_MASK);
419 /* ip6_plen will be filled in ip6_output, so not fill it here. */
420 ip6->ip6_nxt = in6p->in6p_ip6_nxt;
421 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
422
423 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
424 in6p->in6p_cksum != -1) {
425 struct mbuf *n;
426 int off;
427 u_int16_t *p;
428
429 /* compute checksum */
430 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
431 off = offsetof(struct icmp6_hdr, icmp6_cksum);
432 else
433 off = in6p->in6p_cksum;
434 if (plen < off + 1) {
435 error = EINVAL;
436 goto bad;
437 }
438 off += sizeof(struct ip6_hdr);
439
440 n = m;
441 while (n && n->m_len <= off) {
442 off -= n->m_len;
443 n = n->m_next;
444 }
445 if (!n)
446 goto bad;
447 p = (u_int16_t *)(mtod(n, caddr_t) + off);
448 *p = 0;
449 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
450 }
451
452 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p);
453 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
454 if (oifp)
455 icmp6_ifoutstat_inc(oifp, type, code);
456 icmp6stat.icp6s_outhist[type]++;
457 } else
458 rip6stat.rip6s_opackets++;
459
460 goto freectl;
461
462 bad:
463 if (m)
464 m_freem(m);
465
466 freectl:
467 if (control) {
468 ip6_clearpktopts(&opt, -1);
469 m_freem(control);
470 }
471 INP_UNLOCK(in6p);
472 return (error);
473}
474
475/*
476 * Raw IPv6 socket option processing.
477 */
478int
479rip6_ctloutput(struct socket *so, struct sockopt *sopt)
480{
481 int error;
482
483 if (sopt->sopt_level == IPPROTO_ICMPV6)
484 /*
485 * XXX: is it better to call icmp6_ctloutput() directly
486 * from protosw?
487 */
488 return (icmp6_ctloutput(so, sopt));
489 else if (sopt->sopt_level != IPPROTO_IPV6)
490 return (EINVAL);
491
492 error = 0;
493
494 switch (sopt->sopt_dir) {
495 case SOPT_GET:
496 switch (sopt->sopt_name) {
497 case MRT6_INIT:
498 case MRT6_DONE:
499 case MRT6_ADD_MIF:
500 case MRT6_DEL_MIF:
501 case MRT6_ADD_MFC:
502 case MRT6_DEL_MFC:
503 case MRT6_PIM:
504 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) :
505 EOPNOTSUPP;
506 break;
507 case IPV6_CHECKSUM:
508 error = ip6_raw_ctloutput(so, sopt);
509 break;
510 default:
511 error = ip6_ctloutput(so, sopt);
512 break;
513 }
514 break;
515
516 case SOPT_SET:
517 switch (sopt->sopt_name) {
518 case MRT6_INIT:
519 case MRT6_DONE:
520 case MRT6_ADD_MIF:
521 case MRT6_DEL_MIF:
522 case MRT6_ADD_MFC:
523 case MRT6_DEL_MFC:
524 case MRT6_PIM:
525 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) :
526 EOPNOTSUPP;
527 break;
528 case IPV6_CHECKSUM:
529 error = ip6_raw_ctloutput(so, sopt);
530 break;
531 default:
532 error = ip6_ctloutput(so, sopt);
533 break;
534 }
535 break;
536 }
537
538 return (error);
539}
540
541static int
542rip6_attach(struct socket *so, int proto, struct thread *td)
543{
544 struct inpcb *inp;
545 struct icmp6_filter *filter;
546 int error;
547
548 inp = sotoinpcb(so);
549 KASSERT(inp == NULL, ("rip6_attach: inp != NULL"));
550 if (td && (error = suser(td)) != 0)
551 return error;
552 error = soreserve(so, rip_sendspace, rip_recvspace);
553 if (error)
554 return error;
555 MALLOC(filter, struct icmp6_filter *,
556 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
557 if (filter == NULL)
558 return ENOMEM;
559 INP_INFO_WLOCK(&ripcbinfo);
560 error = in_pcballoc(so, &ripcbinfo);
561 if (error) {
562 INP_INFO_WUNLOCK(&ripcbinfo);
563 FREE(filter, M_PCB);
564 return error;
565 }
566 inp = (struct inpcb *)so->so_pcb;
567 INP_INFO_WUNLOCK(&ripcbinfo);
568 inp->inp_vflag |= INP_IPV6;
569 inp->in6p_ip6_nxt = (long)proto;
570 inp->in6p_hops = -1; /* use kernel default */
571 inp->in6p_cksum = -1;
572 inp->in6p_icmp6filt = filter;
573 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
574 INP_UNLOCK(inp);
575 return 0;
576}
577
578static void
579rip6_detach(struct socket *so)
580{
581 struct inpcb *inp;
582
583 inp = sotoinpcb(so);
584 KASSERT(inp != NULL, ("rip6_detach: inp == NULL"));
585
586 if (so == ip6_mrouter && ip6_mrouter_done)
587 ip6_mrouter_done();
588 /* xxx: RSVP */
589 INP_INFO_WLOCK(&ripcbinfo);
590 INP_LOCK(inp);
591 if (inp->in6p_icmp6filt) {
592 FREE(inp->in6p_icmp6filt, M_PCB);
593 inp->in6p_icmp6filt = NULL;
594 }
595 in6_pcbdetach(inp);
596 in6_pcbfree(inp);
597 INP_INFO_WUNLOCK(&ripcbinfo);
598}
599
600/* XXXRW: This can't ever be called. */
601static void
602rip6_abort(struct socket *so)
603{
604 struct inpcb *inp;
605
606 inp = sotoinpcb(so);
607 KASSERT(inp != NULL, ("rip6_abort: inp == NULL"));
608
609 soisdisconnected(so);
610}
611
612static void
613rip6_close(struct socket *so)
614{
615 struct inpcb *inp;
616
617 inp = sotoinpcb(so);
618 KASSERT(inp != NULL, ("rip6_close: inp == NULL"));
619
620 soisdisconnected(so);
621}
622
623static int
624rip6_disconnect(struct socket *so)
625{
626 struct inpcb *inp = sotoinpcb(so);
627
628 if ((so->so_state & SS_ISCONNECTED) == 0)
629 return ENOTCONN;
630 inp->in6p_faddr = in6addr_any;
631 rip6_abort(so);
632 return (0);
633}
634
635static int
636rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
637{
638 struct inpcb *inp = sotoinpcb(so);
639 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
640 struct ifaddr *ia = NULL;
641 int error = 0;
642
643 KASSERT(inp != NULL, ("rip6_bind: inp == NULL"));
644 if (nam->sa_len != sizeof(*addr))
645 return EINVAL;
646 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6)
647 return EADDRNOTAVAIL;
648 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0)
649 return(error);
650
651 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
652 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0)
653 return EADDRNOTAVAIL;
654 if (ia &&
655 ((struct in6_ifaddr *)ia)->ia6_flags &
656 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
657 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
658 return (EADDRNOTAVAIL);
659 }
660 INP_INFO_WLOCK(&ripcbinfo);
661 INP_LOCK(inp);
662 inp->in6p_laddr = addr->sin6_addr;
663 INP_UNLOCK(inp);
664 INP_INFO_WUNLOCK(&ripcbinfo);
665 return 0;
666}
667
668static int
669rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
670{
671 struct inpcb *inp = sotoinpcb(so);
672 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
673 struct in6_addr *in6a = NULL;
674 struct ifnet *ifp = NULL;
675 int error = 0, scope_ambiguous = 0;
676
677 KASSERT(inp != NULL, ("rip6_connect: inp == NULL"));
678 if (nam->sa_len != sizeof(*addr))
679 return EINVAL;
680 if (TAILQ_EMPTY(&ifnet))
681 return EADDRNOTAVAIL;
682 if (addr->sin6_family != AF_INET6)
683 return EAFNOSUPPORT;
684
685 /*
686 * Application should provide a proper zone ID or the use of
687 * default zone IDs should be enabled. Unfortunately, some
688 * applications do not behave as it should, so we need a
689 * workaround. Even if an appropriate ID is not determined,
690 * we'll see if we can determine the outgoing interface. If we
691 * can, determine the zone ID based on the interface below.
692 */
693 if (addr->sin6_scope_id == 0 && !ip6_use_defzone)
694 scope_ambiguous = 1;
695 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0)
696 return(error);
697
698 INP_INFO_WLOCK(&ripcbinfo);
699 INP_LOCK(inp);
700 /* Source address selection. XXX: need pcblookup? */
701 in6a = in6_selectsrc(addr, inp->in6p_outputopts,
702 inp->in6p_moptions, NULL,
703 &inp->in6p_laddr, &ifp, &error);
704 if (in6a == NULL) {
705 INP_UNLOCK(inp);
706 INP_INFO_WUNLOCK(&ripcbinfo);
707 return (error ? error : EADDRNOTAVAIL);
708 }
709
710 /* XXX: see above */
711 if (ifp && scope_ambiguous &&
712 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) {
713 INP_UNLOCK(inp);
714 INP_INFO_WUNLOCK(&ripcbinfo);
715 return(error);
716 }
717 inp->in6p_faddr = addr->sin6_addr;
718 inp->in6p_laddr = *in6a;
719 soisconnected(so);
720 INP_UNLOCK(inp);
721 INP_INFO_WUNLOCK(&ripcbinfo);
722 return 0;
723}
724
725static int
726rip6_shutdown(struct socket *so)
727{
728 struct inpcb *inp;
729
730 inp = sotoinpcb(so);
731 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL"));
732 INP_LOCK(inp);
733 socantsendmore(so);
734 INP_UNLOCK(inp);
735 return 0;
736}
737
738static int
739rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
740 struct mbuf *control, struct thread *td)
741{
742 struct inpcb *inp = sotoinpcb(so);
743 struct sockaddr_in6 tmp;
744 struct sockaddr_in6 *dst;
745 int ret;
746
747 KASSERT(inp != NULL, ("rip6_send: inp == NULL"));
748 INP_INFO_WLOCK(&ripcbinfo);
749 /* always copy sockaddr to avoid overwrites */
750 /* Unlocked read. */
751 if (so->so_state & SS_ISCONNECTED) {
752 if (nam) {
753 INP_INFO_WUNLOCK(&ripcbinfo);
754 m_freem(m);
755 return EISCONN;
756 }
757 /* XXX */
758 bzero(&tmp, sizeof(tmp));
759 tmp.sin6_family = AF_INET6;
760 tmp.sin6_len = sizeof(struct sockaddr_in6);
761 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
762 sizeof(struct in6_addr));
763 dst = &tmp;
764 } else {
765 if (nam == NULL) {
766 INP_INFO_WUNLOCK(&ripcbinfo);
767 m_freem(m);
768 return ENOTCONN;
769 }
770 if (nam->sa_len != sizeof(struct sockaddr_in6)) {
771 INP_INFO_WUNLOCK(&ripcbinfo);
772 m_freem(m);
773 return(EINVAL);
774 }
775 tmp = *(struct sockaddr_in6 *)nam;
776 dst = &tmp;
777
778 if (dst->sin6_family == AF_UNSPEC) {
779 /*
780 * XXX: we allow this case for backward
781 * compatibility to buggy applications that
782 * rely on old (and wrong) kernel behavior.
783 */
784 log(LOG_INFO, "rip6 SEND: address family is "
785 "unspec. Assume AF_INET6\n");
786 dst->sin6_family = AF_INET6;
787 } else if (dst->sin6_family != AF_INET6) {
788 INP_INFO_WUNLOCK(&ripcbinfo);
789 m_freem(m);
790 return(EAFNOSUPPORT);
791 }
792 }
793 ret = rip6_output(m, so, dst, control);
794 INP_INFO_WUNLOCK(&ripcbinfo);
795 return (ret);
796}
797
798struct pr_usrreqs rip6_usrreqs = {
799 .pru_abort = rip6_abort,
800 .pru_attach = rip6_attach,
801 .pru_bind = rip6_bind,
802 .pru_connect = rip6_connect,
803 .pru_control = in6_control,
804 .pru_detach = rip6_detach,
805 .pru_disconnect = rip6_disconnect,
806 .pru_peeraddr = in6_getpeeraddr,
807 .pru_send = rip6_send,
808 .pru_shutdown = rip6_shutdown,
809 .pru_sockaddr = in6_getsockaddr,
810 .pru_close = rip6_close,
811};