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: releng/6.1/sys/netinet6/raw_ip6.c 158179 2006-04-30 16:44:43Z cvs2svn $
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/proc.h>
72 #include <sys/protosw.h>
73 #include <sys/signalvar.h>
74 #include <sys/socket.h>
75 #include <sys/socketvar.h>
76 #include <sys/sx.h>
77 #include <sys/systm.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 <netinet6/ipsec.h>
100 #include <netinet6/ipsec6.h>
101 #endif /*IPSEC*/
102
103 #ifdef FAST_IPSEC
104 #include <netipsec/ipsec.h>
105 #include <netipsec/ipsec6.h>
106 #endif /* FAST_IPSEC */
107
108 #include <machine/stdarg.h>
109
110 #define satosin6(sa) ((struct sockaddr_in6 *)(sa))
111 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
112
113 /*
114 * Raw interface to IP6 protocol.
115 */
116
117 extern struct inpcbhead ripcb;
118 extern struct inpcbinfo ripcbinfo;
119 extern u_long rip_sendspace;
120 extern u_long rip_recvspace;
121
122 struct rip6stat rip6stat;
123
124 /*
125 * Setup generic address and protocol structures
126 * for raw_input routine, then pass them along with
127 * mbuf chain.
128 */
129 int
130 rip6_input(mp, offp, proto)
131 struct mbuf **mp;
132 int *offp, proto;
133 {
134 struct mbuf *m = *mp;
135 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
136 register struct inpcb *in6p;
137 struct inpcb *last = 0;
138 struct mbuf *opts = NULL;
139 struct sockaddr_in6 fromsa;
140
141 rip6stat.rip6s_ipackets++;
142
143 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
144 /* XXX send icmp6 host/port unreach? */
145 m_freem(m);
146 return IPPROTO_DONE;
147 }
148
149 init_sin6(&fromsa, m); /* general init */
150
151 INP_INFO_RLOCK(&ripcbinfo);
152 LIST_FOREACH(in6p, &ripcb, inp_list) {
153 INP_LOCK(in6p);
154 if ((in6p->in6p_vflag & INP_IPV6) == 0) {
155 docontinue:
156 INP_UNLOCK(in6p);
157 continue;
158 }
159 if (in6p->in6p_ip6_nxt &&
160 in6p->in6p_ip6_nxt != proto)
161 goto docontinue;
162 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
163 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
164 goto docontinue;
165 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
166 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
167 goto docontinue;
168 if (in6p->in6p_cksum != -1) {
169 rip6stat.rip6s_isum++;
170 if (in6_cksum(m, proto, *offp,
171 m->m_pkthdr.len - *offp)) {
172 rip6stat.rip6s_badsum++;
173 goto docontinue;
174 }
175 }
176 if (last) {
177 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
178
179 #if defined(IPSEC) || defined(FAST_IPSEC)
180 /*
181 * Check AH/ESP integrity.
182 */
183 if (n && ipsec6_in_reject(n, last)) {
184 m_freem(n);
185 #ifdef IPSEC
186 ipsec6stat.in_polvio++;
187 #endif /*IPSEC*/
188 /* do not inject data into pcb */
189 } else
190 #endif /*IPSEC || FAST_IPSEC*/
191 if (n) {
192 if (last->in6p_flags & IN6P_CONTROLOPTS ||
193 last->in6p_socket->so_options & SO_TIMESTAMP)
194 ip6_savecontrol(last, n, &opts);
195 /* strip intermediate headers */
196 m_adj(n, *offp);
197 if (sbappendaddr(&last->in6p_socket->so_rcv,
198 (struct sockaddr *)&fromsa,
199 n, opts) == 0) {
200 m_freem(n);
201 if (opts)
202 m_freem(opts);
203 rip6stat.rip6s_fullsock++;
204 } else
205 sorwakeup(last->in6p_socket);
206 opts = NULL;
207 }
208 INP_UNLOCK(last);
209 }
210 last = in6p;
211 }
212 #if defined(IPSEC) || defined(FAST_IPSEC)
213 /*
214 * Check AH/ESP integrity.
215 */
216 if (last && ipsec6_in_reject(m, last)) {
217 m_freem(m);
218 #ifdef IPSEC
219 ipsec6stat.in_polvio++;
220 #endif /*IPSEC*/
221 ip6stat.ip6s_delivered--;
222 /* do not inject data into pcb */
223 INP_UNLOCK(last);
224 } else
225 #endif /*IPSEC || FAST_IPSEC*/
226 if (last) {
227 if (last->in6p_flags & IN6P_CONTROLOPTS ||
228 last->in6p_socket->so_options & SO_TIMESTAMP)
229 ip6_savecontrol(last, m, &opts);
230 /* strip intermediate headers */
231 m_adj(m, *offp);
232 if (sbappendaddr(&last->in6p_socket->so_rcv,
233 (struct sockaddr *)&fromsa, m, opts) == 0) {
234 m_freem(m);
235 if (opts)
236 m_freem(opts);
237 rip6stat.rip6s_fullsock++;
238 } else
239 sorwakeup(last->in6p_socket);
240 INP_UNLOCK(last);
241 } else {
242 rip6stat.rip6s_nosock++;
243 if (m->m_flags & M_MCAST)
244 rip6stat.rip6s_nosockmcast++;
245 if (proto == IPPROTO_NONE)
246 m_freem(m);
247 else {
248 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
249 icmp6_error(m, ICMP6_PARAM_PROB,
250 ICMP6_PARAMPROB_NEXTHEADER,
251 prvnxtp - mtod(m, char *));
252 }
253 ip6stat.ip6s_delivered--;
254 }
255 INP_INFO_RUNLOCK(&ripcbinfo);
256 return IPPROTO_DONE;
257 }
258
259 void
260 rip6_ctlinput(cmd, sa, d)
261 int cmd;
262 struct sockaddr *sa;
263 void *d;
264 {
265 struct ip6_hdr *ip6;
266 struct mbuf *m;
267 int off = 0;
268 struct ip6ctlparam *ip6cp = NULL;
269 const struct sockaddr_in6 *sa6_src = NULL;
270 void *cmdarg;
271 struct inpcb *(*notify) __P((struct inpcb *, int)) = in6_rtchange;
272
273 if (sa->sa_family != AF_INET6 ||
274 sa->sa_len != sizeof(struct sockaddr_in6))
275 return;
276
277 if ((unsigned)cmd >= PRC_NCMDS)
278 return;
279 if (PRC_IS_REDIRECT(cmd))
280 notify = in6_rtchange, d = NULL;
281 else if (cmd == PRC_HOSTDEAD)
282 d = NULL;
283 else if (inet6ctlerrmap[cmd] == 0)
284 return;
285
286 /* if the parameter is from icmp6, decode it. */
287 if (d != NULL) {
288 ip6cp = (struct ip6ctlparam *)d;
289 m = ip6cp->ip6c_m;
290 ip6 = ip6cp->ip6c_ip6;
291 off = ip6cp->ip6c_off;
292 cmdarg = ip6cp->ip6c_cmdarg;
293 sa6_src = ip6cp->ip6c_src;
294 } else {
295 m = NULL;
296 ip6 = NULL;
297 cmdarg = NULL;
298 sa6_src = &sa6_any;
299 }
300
301 (void) in6_pcbnotify(&ripcbinfo, sa, 0,
302 (const struct sockaddr *)sa6_src,
303 0, cmd, cmdarg, notify);
304 }
305
306 /*
307 * Generate IPv6 header and pass packet to ip6_output.
308 * Tack on options user may have setup with control call.
309 */
310 int
311 #if __STDC__
312 rip6_output(struct mbuf *m, ...)
313 #else
314 rip6_output(m, va_alist)
315 struct mbuf *m;
316 va_dcl
317 #endif
318 {
319 struct mbuf *control;
320 struct socket *so;
321 struct sockaddr_in6 *dstsock;
322 struct in6_addr *dst;
323 struct ip6_hdr *ip6;
324 struct inpcb *in6p;
325 u_int plen = m->m_pkthdr.len;
326 int error = 0;
327 struct ip6_pktopts opt, *optp;
328 struct ifnet *oifp = NULL;
329 int type = 0, code = 0; /* for ICMPv6 output statistics only */
330 int priv = 0;
331 int scope_ambiguous = 0;
332 struct in6_addr *in6a;
333 va_list ap;
334
335 va_start(ap, m);
336 so = va_arg(ap, struct socket *);
337 dstsock = va_arg(ap, struct sockaddr_in6 *);
338 control = va_arg(ap, struct mbuf *);
339 va_end(ap);
340
341 in6p = sotoin6pcb(so);
342 INP_LOCK(in6p);
343
344 priv = 0;
345 if (so->so_cred->cr_uid == 0)
346 priv = 1;
347 dst = &dstsock->sin6_addr;
348 if (control) {
349 if ((error = ip6_setpktopts(control, &opt,
350 in6p->in6p_outputopts, priv, so->so_proto->pr_protocol))
351 != 0) {
352 goto bad;
353 }
354 optp = &opt;
355 } else
356 optp = in6p->in6p_outputopts;
357
358 /*
359 * Check and convert scope zone ID into internal form.
360 * XXX: we may still need to determine the zone later.
361 */
362 if (!(so->so_state & SS_ISCONNECTED)) {
363 if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone)
364 scope_ambiguous = 1;
365 if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0)
366 goto bad;
367 }
368
369 /*
370 * For an ICMPv6 packet, we should know its type and code
371 * to update statistics.
372 */
373 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
374 struct icmp6_hdr *icmp6;
375 if (m->m_len < sizeof(struct icmp6_hdr) &&
376 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
377 error = ENOBUFS;
378 goto bad;
379 }
380 icmp6 = mtod(m, struct icmp6_hdr *);
381 type = icmp6->icmp6_type;
382 code = icmp6->icmp6_code;
383 }
384
385 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT);
386 if (m == NULL) {
387 error = ENOBUFS;
388 goto bad;
389 }
390 ip6 = mtod(m, struct ip6_hdr *);
391
392 /*
393 * Source address selection.
394 */
395 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, NULL,
396 &in6p->in6p_laddr, &oifp, &error)) == NULL) {
397 if (error == 0)
398 error = EADDRNOTAVAIL;
399 goto bad;
400 }
401 ip6->ip6_src = *in6a;
402
403 if (oifp && scope_ambiguous) {
404 /*
405 * Application should provide a proper zone ID or the use of
406 * default zone IDs should be enabled. Unfortunately, some
407 * applications do not behave as it should, so we need a
408 * workaround. Even if an appropriate ID is not determined
409 * (when it's required), if we can determine the outgoing
410 * interface. determine the zone ID based on the interface.
411 */
412 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL);
413 if (error != 0)
414 goto bad;
415 }
416 ip6->ip6_dst = dstsock->sin6_addr;
417
418 /* fill in the rest of the IPv6 header fields */
419 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
420 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
421 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
422 (IPV6_VERSION & IPV6_VERSION_MASK);
423 /* ip6_plen will be filled in ip6_output, so not fill it here. */
424 ip6->ip6_nxt = in6p->in6p_ip6_nxt;
425 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
426
427 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
428 in6p->in6p_cksum != -1) {
429 struct mbuf *n;
430 int off;
431 u_int16_t *p;
432
433 /* compute checksum */
434 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
435 off = offsetof(struct icmp6_hdr, icmp6_cksum);
436 else
437 off = in6p->in6p_cksum;
438 if (plen < off + 1) {
439 error = EINVAL;
440 goto bad;
441 }
442 off += sizeof(struct ip6_hdr);
443
444 n = m;
445 while (n && n->m_len <= off) {
446 off -= n->m_len;
447 n = n->m_next;
448 }
449 if (!n)
450 goto bad;
451 p = (u_int16_t *)(mtod(n, caddr_t) + off);
452 *p = 0;
453 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
454 }
455
456 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p);
457 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
458 if (oifp)
459 icmp6_ifoutstat_inc(oifp, type, code);
460 icmp6stat.icp6s_outhist[type]++;
461 } else
462 rip6stat.rip6s_opackets++;
463
464 goto freectl;
465
466 bad:
467 if (m)
468 m_freem(m);
469
470 freectl:
471 if (control) {
472 ip6_clearpktopts(&opt, -1);
473 m_freem(control);
474 }
475 INP_UNLOCK(in6p);
476 return (error);
477 }
478
479 /*
480 * Raw IPv6 socket option processing.
481 */
482 int
483 rip6_ctloutput(so, sopt)
484 struct socket *so;
485 struct sockopt *sopt;
486 {
487 int error;
488
489 if (sopt->sopt_level == IPPROTO_ICMPV6)
490 /*
491 * XXX: is it better to call icmp6_ctloutput() directly
492 * from protosw?
493 */
494 return (icmp6_ctloutput(so, sopt));
495 else if (sopt->sopt_level != IPPROTO_IPV6)
496 return (EINVAL);
497
498 error = 0;
499
500 switch (sopt->sopt_dir) {
501 case SOPT_GET:
502 switch (sopt->sopt_name) {
503 case MRT6_INIT:
504 case MRT6_DONE:
505 case MRT6_ADD_MIF:
506 case MRT6_DEL_MIF:
507 case MRT6_ADD_MFC:
508 case MRT6_DEL_MFC:
509 case MRT6_PIM:
510 error = ip6_mrouter_get(so, sopt);
511 break;
512 case IPV6_CHECKSUM:
513 error = ip6_raw_ctloutput(so, sopt);
514 break;
515 default:
516 error = ip6_ctloutput(so, sopt);
517 break;
518 }
519 break;
520
521 case SOPT_SET:
522 switch (sopt->sopt_name) {
523 case MRT6_INIT:
524 case MRT6_DONE:
525 case MRT6_ADD_MIF:
526 case MRT6_DEL_MIF:
527 case MRT6_ADD_MFC:
528 case MRT6_DEL_MFC:
529 case MRT6_PIM:
530 error = ip6_mrouter_set(so, sopt);
531 break;
532 case IPV6_CHECKSUM:
533 error = ip6_raw_ctloutput(so, sopt);
534 break;
535 default:
536 error = ip6_ctloutput(so, sopt);
537 break;
538 }
539 break;
540 }
541
542 return (error);
543 }
544
545 static int
546 rip6_attach(struct socket *so, int proto, struct thread *td)
547 {
548 struct inpcb *inp;
549 struct icmp6_filter *filter;
550 int error, s;
551
552 INP_INFO_WLOCK(&ripcbinfo);
553 inp = sotoinpcb(so);
554 if (inp) {
555 INP_INFO_WUNLOCK(&ripcbinfo);
556 panic("rip6_attach");
557 }
558 if (td && (error = suser(td)) != 0) {
559 INP_INFO_WUNLOCK(&ripcbinfo);
560 return error;
561 }
562 error = soreserve(so, rip_sendspace, rip_recvspace);
563 if (error) {
564 INP_INFO_WUNLOCK(&ripcbinfo);
565 return error;
566 }
567 MALLOC(filter, struct icmp6_filter *,
568 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
569 if (filter == NULL) {
570 INP_INFO_WUNLOCK(&ripcbinfo);
571 return ENOMEM;
572 }
573 s = splnet();
574 error = in_pcballoc(so, &ripcbinfo, "raw6inp");
575 splx(s);
576 if (error) {
577 INP_INFO_WUNLOCK(&ripcbinfo);
578 FREE(filter, M_PCB);
579 return error;
580 }
581 inp = (struct inpcb *)so->so_pcb;
582 INP_LOCK(inp);
583 INP_INFO_WUNLOCK(&ripcbinfo);
584 inp->inp_vflag |= INP_IPV6;
585 inp->in6p_ip6_nxt = (long)proto;
586 inp->in6p_hops = -1; /* use kernel default */
587 inp->in6p_cksum = -1;
588 inp->in6p_icmp6filt = filter;
589 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
590 INP_UNLOCK(inp);
591 return 0;
592 }
593
594 static int
595 rip6_detach(struct socket *so)
596 {
597 struct inpcb *inp;
598
599 INP_INFO_WLOCK(&ripcbinfo);
600 inp = sotoinpcb(so);
601 if (inp == 0) {
602 INP_INFO_WUNLOCK(&ripcbinfo);
603 panic("rip6_detach");
604 }
605 /* xxx: RSVP */
606 if (so == ip6_mrouter)
607 ip6_mrouter_done();
608 if (inp->in6p_icmp6filt) {
609 FREE(inp->in6p_icmp6filt, M_PCB);
610 inp->in6p_icmp6filt = NULL;
611 }
612 INP_LOCK(inp);
613 in6_pcbdetach(inp);
614 INP_INFO_WUNLOCK(&ripcbinfo);
615 return 0;
616 }
617
618 static int
619 rip6_abort(struct socket *so)
620 {
621 soisdisconnected(so);
622 return rip6_detach(so);
623 }
624
625 static int
626 rip6_disconnect(struct socket *so)
627 {
628 struct inpcb *inp = sotoinpcb(so);
629
630 if ((so->so_state & SS_ISCONNECTED) == 0)
631 return ENOTCONN;
632 inp->in6p_faddr = in6addr_any;
633 return rip6_abort(so);
634 }
635
636 static int
637 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
638 {
639 struct inpcb *inp = sotoinpcb(so);
640 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
641 struct ifaddr *ia = NULL;
642 int error = 0;
643
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
668 static int
669 rip6_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 if (nam->sa_len != sizeof(*addr))
678 return EINVAL;
679 if (TAILQ_EMPTY(&ifnet))
680 return EADDRNOTAVAIL;
681 if (addr->sin6_family != AF_INET6)
682 return EAFNOSUPPORT;
683
684 /*
685 * Application should provide a proper zone ID or the use of
686 * default zone IDs should be enabled. Unfortunately, some
687 * applications do not behave as it should, so we need a
688 * workaround. Even if an appropriate ID is not determined,
689 * we'll see if we can determine the outgoing interface. If we
690 * can, determine the zone ID based on the interface below.
691 */
692 if (addr->sin6_scope_id == 0 && !ip6_use_defzone)
693 scope_ambiguous = 1;
694 if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0)
695 return(error);
696
697 INP_INFO_WLOCK(&ripcbinfo);
698 INP_LOCK(inp);
699 /* Source address selection. XXX: need pcblookup? */
700 in6a = in6_selectsrc(addr, inp->in6p_outputopts,
701 inp->in6p_moptions, NULL,
702 &inp->in6p_laddr, &ifp, &error);
703 if (in6a == NULL) {
704 INP_UNLOCK(inp);
705 INP_INFO_WUNLOCK(&ripcbinfo);
706 return (error ? error : EADDRNOTAVAIL);
707 }
708
709 /* XXX: see above */
710 if (ifp && scope_ambiguous &&
711 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) {
712 INP_UNLOCK(inp);
713 INP_INFO_WUNLOCK(&ripcbinfo);
714 return(error);
715 }
716 inp->in6p_faddr = addr->sin6_addr;
717 inp->in6p_laddr = *in6a;
718 soisconnected(so);
719 INP_UNLOCK(inp);
720 INP_INFO_WUNLOCK(&ripcbinfo);
721 return 0;
722 }
723
724 static int
725 rip6_shutdown(struct socket *so)
726 {
727 struct inpcb *inp;
728
729 INP_INFO_RLOCK(&ripcbinfo);
730 inp = sotoinpcb(so);
731 INP_LOCK(inp);
732 INP_INFO_RUNLOCK(&ripcbinfo);
733 socantsendmore(so);
734 INP_UNLOCK(inp);
735 return 0;
736 }
737
738 static int
739 rip6_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 INP_INFO_WLOCK(&ripcbinfo);
748 /* always copy sockaddr to avoid overwrites */
749 /* Unlocked read. */
750 if (so->so_state & SS_ISCONNECTED) {
751 if (nam) {
752 INP_INFO_WUNLOCK(&ripcbinfo);
753 m_freem(m);
754 return EISCONN;
755 }
756 /* XXX */
757 bzero(&tmp, sizeof(tmp));
758 tmp.sin6_family = AF_INET6;
759 tmp.sin6_len = sizeof(struct sockaddr_in6);
760 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
761 sizeof(struct in6_addr));
762 dst = &tmp;
763 } else {
764 if (nam == NULL) {
765 INP_INFO_WUNLOCK(&ripcbinfo);
766 m_freem(m);
767 return ENOTCONN;
768 }
769 if (nam->sa_len != sizeof(struct sockaddr_in6)) {
770 INP_INFO_WUNLOCK(&ripcbinfo);
771 m_freem(m);
772 return(EINVAL);
773 }
774 tmp = *(struct sockaddr_in6 *)nam;
775 dst = &tmp;
776
777 if (dst->sin6_family == AF_UNSPEC) {
778 /*
779 * XXX: we allow this case for backward
780 * compatibility to buggy applications that
781 * rely on old (and wrong) kernel behavior.
782 */
783 log(LOG_INFO, "rip6 SEND: address family is "
784 "unspec. Assume AF_INET6\n");
785 dst->sin6_family = AF_INET6;
786 } else if (dst->sin6_family != AF_INET6) {
787 INP_INFO_WUNLOCK(&ripcbinfo);
788 m_freem(m);
789 return(EAFNOSUPPORT);
790 }
791 }
792 ret = rip6_output(m, so, dst, control);
793 INP_INFO_WUNLOCK(&ripcbinfo);
794 return (ret);
795 }
796
797 struct pr_usrreqs rip6_usrreqs = {
798 .pru_abort = rip6_abort,
799 .pru_attach = rip6_attach,
800 .pru_bind = rip6_bind,
801 .pru_connect = rip6_connect,
802 .pru_control = in6_control,
803 .pru_detach = rip6_detach,
804 .pru_disconnect = rip6_disconnect,
805 .pru_peeraddr = in6_setpeeraddr,
806 .pru_send = rip6_send,
807 .pru_shutdown = rip6_shutdown,
808 .pru_sockaddr = in6_setsockaddr,
809 };
Cache object: 2d597b283e617808cbe62df9851d8369
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