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
30 /*-
31 * Copyright (c) 1982, 1986, 1988, 1993
32 * The Regents of the University of California.
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
43 * 4. Neither the name of the University nor the names of its contributors
44 * may be used to endorse or promote products derived from this software
45 * without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
57 * SUCH DAMAGE.
58 *
59 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
60 */
61
62 #include <sys/cdefs.h>
63 __FBSDID("$FreeBSD: src/sys/netinet6/raw_ip6.c,v 1.94 2008/12/02 21:37:28 bz Exp $");
64
65 #include "opt_ipsec.h"
66 #include "opt_inet6.h"
67
68 #include <sys/param.h>
69 #include <sys/errno.h>
70 #include <sys/jail.h>
71 #include <sys/lock.h>
72 #include <sys/malloc.h>
73 #include <sys/mbuf.h>
74 #include <sys/priv.h>
75 #include <sys/proc.h>
76 #include <sys/protosw.h>
77 #include <sys/signalvar.h>
78 #include <sys/socket.h>
79 #include <sys/socketvar.h>
80 #include <sys/sx.h>
81 #include <sys/syslog.h>
82 #include <sys/vimage.h>
83
84 #include <net/if.h>
85 #include <net/if_types.h>
86 #include <net/route.h>
87 #include <net/vnet.h>
88
89 #include <netinet/in.h>
90 #include <netinet/in_var.h>
91 #include <netinet/in_systm.h>
92 #include <netinet/in_pcb.h>
93 #include <netinet/vinet.h>
94
95 #include <netinet/icmp6.h>
96 #include <netinet/ip6.h>
97 #include <netinet6/ip6protosw.h>
98 #include <netinet6/ip6_mroute.h>
99 #include <netinet6/in6_pcb.h>
100 #include <netinet6/ip6_var.h>
101 #include <netinet6/nd6.h>
102 #include <netinet6/raw_ip6.h>
103 #include <netinet6/scope6_var.h>
104 #include <netinet6/vinet6.h>
105
106 #ifdef IPSEC
107 #include <netipsec/ipsec.h>
108 #include <netipsec/ipsec6.h>
109 #endif /* IPSEC */
110
111 #include <machine/stdarg.h>
112
113 #define satosin6(sa) ((struct sockaddr_in6 *)(sa))
114 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
115
116 /*
117 * Raw interface to IP6 protocol.
118 */
119
120 #ifdef VIMAGE_GLOBALS
121 extern struct inpcbhead ripcb;
122 extern struct inpcbinfo ripcbinfo;
123 struct rip6stat rip6stat;
124 #endif
125
126 extern u_long rip_sendspace;
127 extern u_long rip_recvspace;
128
129 /*
130 * Hooks for multicast forwarding.
131 */
132 struct socket *ip6_mrouter = NULL;
133 int (*ip6_mrouter_set)(struct socket *, struct sockopt *);
134 int (*ip6_mrouter_get)(struct socket *, struct sockopt *);
135 int (*ip6_mrouter_done)(void);
136 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *);
137 int (*mrt6_ioctl)(int, caddr_t);
138
139 /*
140 * Setup generic address and protocol structures for raw_input routine, then
141 * pass them along with mbuf chain.
142 */
143 int
144 rip6_input(struct mbuf **mp, int *offp, int proto)
145 {
146 INIT_VNET_INET(curvnet);
147 INIT_VNET_INET6(curvnet);
148 #ifdef IPSEC
149 INIT_VNET_IPSEC(curvnet);
150 #endif
151 struct mbuf *m = *mp;
152 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
153 register struct inpcb *in6p;
154 struct inpcb *last = 0;
155 struct mbuf *opts = NULL;
156 struct sockaddr_in6 fromsa;
157
158 V_rip6stat.rip6s_ipackets++;
159
160 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
161 /* XXX Send icmp6 host/port unreach? */
162 m_freem(m);
163 return (IPPROTO_DONE);
164 }
165
166 init_sin6(&fromsa, m); /* general init */
167
168 INP_INFO_RLOCK(&V_ripcbinfo);
169 LIST_FOREACH(in6p, &V_ripcb, inp_list) {
170 /* XXX inp locking */
171 if ((in6p->in6p_vflag & INP_IPV6) == 0)
172 continue;
173 if (in6p->in6p_ip6_nxt &&
174 in6p->in6p_ip6_nxt != proto)
175 continue;
176 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
177 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
178 continue;
179 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
180 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
181 continue;
182 if (jailed(in6p->inp_cred)) {
183 if (!prison_check_ip6(in6p->inp_cred, &ip6->ip6_dst))
184 continue;
185 }
186 INP_RLOCK(in6p);
187 if (in6p->in6p_cksum != -1) {
188 V_rip6stat.rip6s_isum++;
189 if (in6_cksum(m, proto, *offp,
190 m->m_pkthdr.len - *offp)) {
191 INP_RUNLOCK(in6p);
192 V_rip6stat.rip6s_badsum++;
193 continue;
194 }
195 }
196 if (last) {
197 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
198
199 #ifdef IPSEC
200 /*
201 * Check AH/ESP integrity.
202 */
203 if (n && ipsec6_in_reject(n, last)) {
204 m_freem(n);
205 V_ipsec6stat.in_polvio++;
206 /* Do not inject data into pcb. */
207 } else
208 #endif /* IPSEC */
209 if (n) {
210 if (last->in6p_flags & IN6P_CONTROLOPTS ||
211 last->in6p_socket->so_options & SO_TIMESTAMP)
212 ip6_savecontrol(last, n, &opts);
213 /* strip intermediate headers */
214 m_adj(n, *offp);
215 if (sbappendaddr(&last->in6p_socket->so_rcv,
216 (struct sockaddr *)&fromsa,
217 n, opts) == 0) {
218 m_freem(n);
219 if (opts)
220 m_freem(opts);
221 V_rip6stat.rip6s_fullsock++;
222 } else
223 sorwakeup(last->in6p_socket);
224 opts = NULL;
225 }
226 INP_RUNLOCK(last);
227 }
228 last = in6p;
229 }
230 INP_INFO_RUNLOCK(&V_ripcbinfo);
231 #ifdef IPSEC
232 /*
233 * Check AH/ESP integrity.
234 */
235 if (last && ipsec6_in_reject(m, last)) {
236 m_freem(m);
237 V_ipsec6stat.in_polvio++;
238 V_ip6stat.ip6s_delivered--;
239 /* Do not inject data into pcb. */
240 INP_RUNLOCK(last);
241 } else
242 #endif /* IPSEC */
243 if (last) {
244 if (last->in6p_flags & IN6P_CONTROLOPTS ||
245 last->in6p_socket->so_options & SO_TIMESTAMP)
246 ip6_savecontrol(last, m, &opts);
247 /* Strip intermediate headers. */
248 m_adj(m, *offp);
249 if (sbappendaddr(&last->in6p_socket->so_rcv,
250 (struct sockaddr *)&fromsa, m, opts) == 0) {
251 m_freem(m);
252 if (opts)
253 m_freem(opts);
254 V_rip6stat.rip6s_fullsock++;
255 } else
256 sorwakeup(last->in6p_socket);
257 INP_RUNLOCK(last);
258 } else {
259 V_rip6stat.rip6s_nosock++;
260 if (m->m_flags & M_MCAST)
261 V_rip6stat.rip6s_nosockmcast++;
262 if (proto == IPPROTO_NONE)
263 m_freem(m);
264 else {
265 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
266 icmp6_error(m, ICMP6_PARAM_PROB,
267 ICMP6_PARAMPROB_NEXTHEADER,
268 prvnxtp - mtod(m, char *));
269 }
270 V_ip6stat.ip6s_delivered--;
271 }
272 return (IPPROTO_DONE);
273 }
274
275 void
276 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d)
277 {
278 INIT_VNET_INET(curvnet);
279 struct ip6_hdr *ip6;
280 struct mbuf *m;
281 int off = 0;
282 struct ip6ctlparam *ip6cp = NULL;
283 const struct sockaddr_in6 *sa6_src = NULL;
284 void *cmdarg;
285 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange;
286
287 if (sa->sa_family != AF_INET6 ||
288 sa->sa_len != sizeof(struct sockaddr_in6))
289 return;
290
291 if ((unsigned)cmd >= PRC_NCMDS)
292 return;
293 if (PRC_IS_REDIRECT(cmd))
294 notify = in6_rtchange, d = NULL;
295 else if (cmd == PRC_HOSTDEAD)
296 d = NULL;
297 else if (inet6ctlerrmap[cmd] == 0)
298 return;
299
300 /*
301 * If the parameter is from icmp6, decode it.
302 */
303 if (d != NULL) {
304 ip6cp = (struct ip6ctlparam *)d;
305 m = ip6cp->ip6c_m;
306 ip6 = ip6cp->ip6c_ip6;
307 off = ip6cp->ip6c_off;
308 cmdarg = ip6cp->ip6c_cmdarg;
309 sa6_src = ip6cp->ip6c_src;
310 } else {
311 m = NULL;
312 ip6 = NULL;
313 cmdarg = NULL;
314 sa6_src = &sa6_any;
315 }
316
317 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0,
318 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify);
319 }
320
321 /*
322 * Generate IPv6 header and pass packet to ip6_output. Tack on options user
323 * may have setup with control call.
324 */
325 int
326 #if __STDC__
327 rip6_output(struct mbuf *m, ...)
328 #else
329 rip6_output(m, va_alist)
330 struct mbuf *m;
331 va_dcl
332 #endif
333 {
334 INIT_VNET_INET6(curvnet);
335 struct mbuf *control;
336 struct socket *so;
337 struct sockaddr_in6 *dstsock;
338 struct in6_addr *dst;
339 struct ip6_hdr *ip6;
340 struct inpcb *in6p;
341 u_int plen = m->m_pkthdr.len;
342 int error = 0;
343 struct ip6_pktopts opt, *optp;
344 struct ifnet *oifp = NULL;
345 int type = 0, code = 0; /* for ICMPv6 output statistics only */
346 int scope_ambiguous = 0;
347 struct in6_addr *in6a;
348 va_list ap;
349
350 va_start(ap, m);
351 so = va_arg(ap, struct socket *);
352 dstsock = va_arg(ap, struct sockaddr_in6 *);
353 control = va_arg(ap, struct mbuf *);
354 va_end(ap);
355
356 in6p = sotoin6pcb(so);
357 INP_WLOCK(in6p);
358
359 dst = &dstsock->sin6_addr;
360 if (control) {
361 if ((error = ip6_setpktopts(control, &opt,
362 in6p->in6p_outputopts, so->so_cred,
363 so->so_proto->pr_protocol)) != 0) {
364 goto bad;
365 }
366 optp = &opt;
367 } else
368 optp = in6p->in6p_outputopts;
369
370 /*
371 * Check and convert scope zone ID into internal form.
372 *
373 * XXX: we may still need to determine the zone later.
374 */
375 if (!(so->so_state & SS_ISCONNECTED)) {
376 if (dstsock->sin6_scope_id == 0 && !V_ip6_use_defzone)
377 scope_ambiguous = 1;
378 if ((error = sa6_embedscope(dstsock, V_ip6_use_defzone)) != 0)
379 goto bad;
380 }
381
382 /*
383 * For an ICMPv6 packet, we should know its type and code to update
384 * statistics.
385 */
386 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
387 struct icmp6_hdr *icmp6;
388 if (m->m_len < sizeof(struct icmp6_hdr) &&
389 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
390 error = ENOBUFS;
391 goto bad;
392 }
393 icmp6 = mtod(m, struct icmp6_hdr *);
394 type = icmp6->icmp6_type;
395 code = icmp6->icmp6_code;
396 }
397
398 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT);
399 if (m == NULL) {
400 error = ENOBUFS;
401 goto bad;
402 }
403 ip6 = mtod(m, struct ip6_hdr *);
404
405 /*
406 * Source address selection.
407 */
408 if ((in6a = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred,
409 &oifp, &error)) == NULL) {
410 if (error == 0)
411 error = EADDRNOTAVAIL;
412 goto bad;
413 }
414 if (jailed(in6p->inp_cred))
415 if (prison_getip6(in6p->inp_cred, in6a) != 0) {
416 error = EPERM;
417 goto bad;
418 }
419 ip6->ip6_src = *in6a;
420
421 if (oifp && scope_ambiguous) {
422 /*
423 * Application should provide a proper zone ID or the use of
424 * default zone IDs should be enabled. Unfortunately, some
425 * applications do not behave as it should, so we need a
426 * workaround. Even if an appropriate ID is not determined
427 * (when it's required), if we can determine the outgoing
428 * interface. determine the zone ID based on the interface.
429 */
430 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL);
431 if (error != 0)
432 goto bad;
433 }
434 ip6->ip6_dst = dstsock->sin6_addr;
435
436 /*
437 * Fill in the rest of the IPv6 header fields.
438 */
439 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
440 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
441 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
442 (IPV6_VERSION & IPV6_VERSION_MASK);
443
444 /*
445 * ip6_plen will be filled in ip6_output, so not fill it here.
446 */
447 ip6->ip6_nxt = in6p->in6p_ip6_nxt;
448 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
449
450 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
451 in6p->in6p_cksum != -1) {
452 struct mbuf *n;
453 int off;
454 u_int16_t *p;
455
456 /* Compute checksum. */
457 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
458 off = offsetof(struct icmp6_hdr, icmp6_cksum);
459 else
460 off = in6p->in6p_cksum;
461 if (plen < off + 1) {
462 error = EINVAL;
463 goto bad;
464 }
465 off += sizeof(struct ip6_hdr);
466
467 n = m;
468 while (n && n->m_len <= off) {
469 off -= n->m_len;
470 n = n->m_next;
471 }
472 if (!n)
473 goto bad;
474 p = (u_int16_t *)(mtod(n, caddr_t) + off);
475 *p = 0;
476 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
477 }
478
479 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p);
480 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
481 if (oifp)
482 icmp6_ifoutstat_inc(oifp, type, code);
483 V_icmp6stat.icp6s_outhist[type]++;
484 } else
485 V_rip6stat.rip6s_opackets++;
486
487 goto freectl;
488
489 bad:
490 if (m)
491 m_freem(m);
492
493 freectl:
494 if (control) {
495 ip6_clearpktopts(&opt, -1);
496 m_freem(control);
497 }
498 INP_WUNLOCK(in6p);
499 return (error);
500 }
501
502 /*
503 * Raw IPv6 socket option processing.
504 */
505 int
506 rip6_ctloutput(struct socket *so, struct sockopt *sopt)
507 {
508 int error;
509
510 if (sopt->sopt_level == IPPROTO_ICMPV6)
511 /*
512 * XXX: is it better to call icmp6_ctloutput() directly
513 * from protosw?
514 */
515 return (icmp6_ctloutput(so, sopt));
516 else if (sopt->sopt_level != IPPROTO_IPV6)
517 return (EINVAL);
518
519 error = 0;
520
521 switch (sopt->sopt_dir) {
522 case SOPT_GET:
523 switch (sopt->sopt_name) {
524 case MRT6_INIT:
525 case MRT6_DONE:
526 case MRT6_ADD_MIF:
527 case MRT6_DEL_MIF:
528 case MRT6_ADD_MFC:
529 case MRT6_DEL_MFC:
530 case MRT6_PIM:
531 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) :
532 EOPNOTSUPP;
533 break;
534 case IPV6_CHECKSUM:
535 error = ip6_raw_ctloutput(so, sopt);
536 break;
537 default:
538 error = ip6_ctloutput(so, sopt);
539 break;
540 }
541 break;
542
543 case SOPT_SET:
544 switch (sopt->sopt_name) {
545 case MRT6_INIT:
546 case MRT6_DONE:
547 case MRT6_ADD_MIF:
548 case MRT6_DEL_MIF:
549 case MRT6_ADD_MFC:
550 case MRT6_DEL_MFC:
551 case MRT6_PIM:
552 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) :
553 EOPNOTSUPP;
554 break;
555 case IPV6_CHECKSUM:
556 error = ip6_raw_ctloutput(so, sopt);
557 break;
558 default:
559 error = ip6_ctloutput(so, sopt);
560 break;
561 }
562 break;
563 }
564
565 return (error);
566 }
567
568 static int
569 rip6_attach(struct socket *so, int proto, struct thread *td)
570 {
571 INIT_VNET_INET(so->so_vnet);
572 struct inpcb *inp;
573 struct icmp6_filter *filter;
574 int error;
575
576 inp = sotoinpcb(so);
577 KASSERT(inp == NULL, ("rip6_attach: inp != NULL"));
578
579 error = priv_check(td, PRIV_NETINET_RAW);
580 if (error)
581 return (error);
582 error = soreserve(so, rip_sendspace, rip_recvspace);
583 if (error)
584 return (error);
585 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
586 if (filter == NULL)
587 return (ENOMEM);
588 INP_INFO_WLOCK(&V_ripcbinfo);
589 error = in_pcballoc(so, &V_ripcbinfo);
590 if (error) {
591 INP_INFO_WUNLOCK(&V_ripcbinfo);
592 free(filter, M_PCB);
593 return (error);
594 }
595 inp = (struct inpcb *)so->so_pcb;
596 INP_INFO_WUNLOCK(&V_ripcbinfo);
597 inp->inp_vflag |= INP_IPV6;
598 inp->in6p_ip6_nxt = (long)proto;
599 inp->in6p_hops = -1; /* use kernel default */
600 inp->in6p_cksum = -1;
601 inp->in6p_icmp6filt = filter;
602 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
603 INP_WUNLOCK(inp);
604 return (0);
605 }
606
607 static void
608 rip6_detach(struct socket *so)
609 {
610 INIT_VNET_INET(so->so_vnet);
611 struct inpcb *inp;
612
613 inp = sotoinpcb(so);
614 KASSERT(inp != NULL, ("rip6_detach: inp == NULL"));
615
616 if (so == ip6_mrouter && ip6_mrouter_done)
617 ip6_mrouter_done();
618 /* xxx: RSVP */
619 INP_INFO_WLOCK(&V_ripcbinfo);
620 INP_WLOCK(inp);
621 free(inp->in6p_icmp6filt, M_PCB);
622 in_pcbdetach(inp);
623 in_pcbfree(inp);
624 INP_INFO_WUNLOCK(&V_ripcbinfo);
625 }
626
627 /* XXXRW: This can't ever be called. */
628 static void
629 rip6_abort(struct socket *so)
630 {
631 struct inpcb *inp;
632
633 inp = sotoinpcb(so);
634 KASSERT(inp != NULL, ("rip6_abort: inp == NULL"));
635
636 soisdisconnected(so);
637 }
638
639 static void
640 rip6_close(struct socket *so)
641 {
642 struct inpcb *inp;
643
644 inp = sotoinpcb(so);
645 KASSERT(inp != NULL, ("rip6_close: inp == NULL"));
646
647 soisdisconnected(so);
648 }
649
650 static int
651 rip6_disconnect(struct socket *so)
652 {
653 struct inpcb *inp;
654
655 inp = sotoinpcb(so);
656 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL"));
657
658 if ((so->so_state & SS_ISCONNECTED) == 0)
659 return (ENOTCONN);
660 inp->in6p_faddr = in6addr_any;
661 rip6_abort(so);
662 return (0);
663 }
664
665 static int
666 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
667 {
668 INIT_VNET_NET(so->so_vnet);
669 INIT_VNET_INET(so->so_vnet);
670 INIT_VNET_INET6(so->so_vnet);
671 struct inpcb *inp;
672 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
673 struct ifaddr *ia = NULL;
674 int error = 0;
675
676 inp = sotoinpcb(so);
677 KASSERT(inp != NULL, ("rip6_bind: inp == NULL"));
678
679 if (nam->sa_len != sizeof(*addr))
680 return (EINVAL);
681 if (!prison_check_ip6(td->td_ucred, &addr->sin6_addr))
682 return (EADDRNOTAVAIL);
683 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6)
684 return (EADDRNOTAVAIL);
685 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0)
686 return (error);
687
688 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
689 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0)
690 return (EADDRNOTAVAIL);
691 if (ia &&
692 ((struct in6_ifaddr *)ia)->ia6_flags &
693 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
694 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
695 return (EADDRNOTAVAIL);
696 }
697 INP_INFO_WLOCK(&V_ripcbinfo);
698 INP_WLOCK(inp);
699 inp->in6p_laddr = addr->sin6_addr;
700 INP_WUNLOCK(inp);
701 INP_INFO_WUNLOCK(&V_ripcbinfo);
702 return (0);
703 }
704
705 static int
706 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
707 {
708 INIT_VNET_NET(so->so_vnet);
709 INIT_VNET_INET(so->so_vnet);
710 INIT_VNET_INET6(so->so_vnet);
711 struct inpcb *inp;
712 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
713 struct in6_addr *in6a = NULL;
714 struct ifnet *ifp = NULL;
715 int error = 0, scope_ambiguous = 0;
716
717 inp = sotoinpcb(so);
718 KASSERT(inp != NULL, ("rip6_connect: inp == NULL"));
719
720 if (nam->sa_len != sizeof(*addr))
721 return (EINVAL);
722 if (TAILQ_EMPTY(&V_ifnet))
723 return (EADDRNOTAVAIL);
724 if (addr->sin6_family != AF_INET6)
725 return (EAFNOSUPPORT);
726
727 /*
728 * Application should provide a proper zone ID or the use of default
729 * zone IDs should be enabled. Unfortunately, some applications do
730 * not behave as it should, so we need a workaround. Even if an
731 * appropriate ID is not determined, we'll see if we can determine
732 * the outgoing interface. If we can, determine the zone ID based on
733 * the interface below.
734 */
735 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone)
736 scope_ambiguous = 1;
737 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0)
738 return (error);
739
740 INP_INFO_WLOCK(&V_ripcbinfo);
741 INP_WLOCK(inp);
742 /* Source address selection. XXX: need pcblookup? */
743 in6a = in6_selectsrc(addr, inp->in6p_outputopts,
744 inp, NULL, so->so_cred,
745 &ifp, &error);
746 if (in6a == NULL) {
747 INP_WUNLOCK(inp);
748 INP_INFO_WUNLOCK(&V_ripcbinfo);
749 return (error ? error : EADDRNOTAVAIL);
750 }
751
752 /* XXX: see above */
753 if (ifp && scope_ambiguous &&
754 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) {
755 INP_WUNLOCK(inp);
756 INP_INFO_WUNLOCK(&V_ripcbinfo);
757 return (error);
758 }
759 inp->in6p_faddr = addr->sin6_addr;
760 inp->in6p_laddr = *in6a;
761 soisconnected(so);
762 INP_WUNLOCK(inp);
763 INP_INFO_WUNLOCK(&V_ripcbinfo);
764 return (0);
765 }
766
767 static int
768 rip6_shutdown(struct socket *so)
769 {
770 struct inpcb *inp;
771
772 inp = sotoinpcb(so);
773 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL"));
774
775 INP_WLOCK(inp);
776 socantsendmore(so);
777 INP_WUNLOCK(inp);
778 return (0);
779 }
780
781 static int
782 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
783 struct mbuf *control, struct thread *td)
784 {
785 struct inpcb *inp;
786 struct sockaddr_in6 tmp;
787 struct sockaddr_in6 *dst;
788 int ret;
789
790 inp = sotoinpcb(so);
791 KASSERT(inp != NULL, ("rip6_send: inp == NULL"));
792
793 /* Always copy sockaddr to avoid overwrites. */
794 /* Unlocked read. */
795 if (so->so_state & SS_ISCONNECTED) {
796 if (nam) {
797 m_freem(m);
798 return (EISCONN);
799 }
800 /* XXX */
801 bzero(&tmp, sizeof(tmp));
802 tmp.sin6_family = AF_INET6;
803 tmp.sin6_len = sizeof(struct sockaddr_in6);
804 INP_RLOCK(inp);
805 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
806 sizeof(struct in6_addr));
807 INP_RUNLOCK(inp);
808 dst = &tmp;
809 } else {
810 if (nam == NULL) {
811 m_freem(m);
812 return (ENOTCONN);
813 }
814 if (nam->sa_len != sizeof(struct sockaddr_in6)) {
815 m_freem(m);
816 return (EINVAL);
817 }
818 tmp = *(struct sockaddr_in6 *)nam;
819 dst = &tmp;
820
821 if (dst->sin6_family == AF_UNSPEC) {
822 /*
823 * XXX: we allow this case for backward
824 * compatibility to buggy applications that
825 * rely on old (and wrong) kernel behavior.
826 */
827 log(LOG_INFO, "rip6 SEND: address family is "
828 "unspec. Assume AF_INET6\n");
829 dst->sin6_family = AF_INET6;
830 } else if (dst->sin6_family != AF_INET6) {
831 m_freem(m);
832 return(EAFNOSUPPORT);
833 }
834 }
835 ret = rip6_output(m, so, dst, control);
836 return (ret);
837 }
838
839 struct pr_usrreqs rip6_usrreqs = {
840 .pru_abort = rip6_abort,
841 .pru_attach = rip6_attach,
842 .pru_bind = rip6_bind,
843 .pru_connect = rip6_connect,
844 .pru_control = in6_control,
845 .pru_detach = rip6_detach,
846 .pru_disconnect = rip6_disconnect,
847 .pru_peeraddr = in6_getpeeraddr,
848 .pru_send = rip6_send,
849 .pru_shutdown = rip6_shutdown,
850 .pru_sockaddr = in6_getsockaddr,
851 .pru_close = rip6_close,
852 };
853
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