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: src/sys/netinet6/raw_ip6.c,v 1.7.2.7 2003/01/24 05:11:35 sam Exp $
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 * 3. 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_inet6.h"
64
65 #include <sys/param.h>
66 #include <sys/malloc.h>
67 #include <sys/proc.h>
68 #include <sys/caps.h>
69 #include <sys/mbuf.h>
70 #include <sys/socket.h>
71 #include <sys/jail.h>
72 #include <sys/protosw.h>
73 #include <sys/socketvar.h>
74 #include <sys/errno.h>
75 #include <sys/systm.h>
76
77 #include <sys/thread2.h>
78 #include <sys/socketvar2.h>
79 #include <sys/msgport2.h>
80
81 #include <net/if.h>
82 #include <net/route.h>
83 #include <net/if_types.h>
84
85 #include <netinet/in.h>
86 #include <netinet/in_var.h>
87 #include <netinet/in_systm.h>
88 #include <netinet/ip6.h>
89 #include <netinet6/ip6_var.h>
90 #include <netinet6/ip6_mroute.h>
91 #include <netinet/icmp6.h>
92 #include <netinet/in_pcb.h>
93 #include <netinet6/in6_pcb.h>
94 #include <netinet6/nd6.h>
95 #include <netinet6/ip6protosw.h>
96 #ifdef ENABLE_DEFAULT_SCOPE
97 #include <netinet6/scope6_var.h>
98 #endif
99 #include <netinet6/raw_ip6.h>
100
101 #include <machine/stdarg.h>
102
103 #define satosin6(sa) ((struct sockaddr_in6 *)(sa))
104 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
105
106 /*
107 * Raw interface to IP6 protocol.
108 */
109
110 extern struct inpcbinfo ripcbinfo;
111 extern u_long rip_sendspace;
112 extern u_long rip_recvspace;
113
114 struct rip6stat rip6stat;
115
116 /*
117 * Setup generic address and protocol structures
118 * for raw_input routine, then pass them along with
119 * mbuf chain.
120 */
121 int
rip6_input(struct mbuf ** mp,int * offp,int proto)122 rip6_input(struct mbuf **mp, int *offp, int proto)
123 {
124 struct mbuf *m = *mp;
125 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
126 struct inpcb *in6p;
127 struct inpcb *last = NULL;
128 struct mbuf *opts = NULL;
129 struct sockaddr_in6 rip6src;
130
131 rip6stat.rip6s_ipackets++;
132
133 init_sin6(&rip6src, m); /* general init */
134
135 LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
136 if (in6p->in6p_flags & INP_PLACEMARKER)
137 continue;
138 if (!INP_ISIPV6(in6p))
139 continue;
140 if (in6p->in6p_ip6_nxt &&
141 in6p->in6p_ip6_nxt != proto)
142 continue;
143 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
144 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
145 continue;
146 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
147 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
148 continue;
149 if (in6p->in6p_cksum != -1) {
150 rip6stat.rip6s_isum++;
151 if (in6_cksum(m, ip6->ip6_nxt, *offp,
152 m->m_pkthdr.len - *offp)) {
153 rip6stat.rip6s_badsum++;
154 continue;
155 }
156 }
157 if (last) {
158 struct mbuf *n;
159
160 n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
161 if (n != NULL) {
162 struct socket *so;
163
164 so = last->in6p_socket;
165 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
166 (so->so_options & SO_TIMESTAMP)) {
167 ip6_savecontrol(last, &opts, ip6, n);
168 }
169 /* strip intermediate headers */
170 m_adj(n, *offp);
171 lwkt_gettoken(&so->so_rcv.ssb_token);
172 if (ssb_appendaddr(&so->so_rcv,
173 (struct sockaddr *)&rip6src,
174 n, opts) == 0) {
175 m_freem(n);
176 if (opts)
177 m_freem(opts);
178 rip6stat.rip6s_fullsock++;
179 soroverflow(so);
180 } else {
181 sorwakeup(so);
182 }
183 lwkt_reltoken(&so->so_rcv.ssb_token);
184 opts = NULL;
185 }
186 }
187 last = in6p;
188 }
189 if (last) {
190 struct socket *so;
191
192 so = last->in6p_socket;
193 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
194 (so->so_options & SO_TIMESTAMP)) {
195 ip6_savecontrol(last, &opts, ip6, m);
196 }
197 /* strip intermediate headers */
198 m_adj(m, *offp);
199 lwkt_gettoken(&so->so_rcv.ssb_token);
200 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src,
201 m, opts) == 0) {
202 m_freem(m);
203 if (opts)
204 m_freem(opts);
205 rip6stat.rip6s_fullsock++;
206 soroverflow(so);
207 } else {
208 sorwakeup(so);
209 }
210 lwkt_reltoken(&so->so_rcv.ssb_token);
211 } else {
212 rip6stat.rip6s_nosock++;
213 if (m->m_flags & M_MCAST)
214 rip6stat.rip6s_nosockmcast++;
215 if (proto == IPPROTO_NONE)
216 m_freem(m);
217 else {
218 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
219 icmp6_error(m, ICMP6_PARAM_PROB,
220 ICMP6_PARAMPROB_NEXTHEADER,
221 prvnxtp - mtod(m, char *));
222 }
223 ip6stat.ip6s_delivered--;
224 }
225 return IPPROTO_DONE;
226 }
227
228 void
rip6_ctlinput(netmsg_t msg)229 rip6_ctlinput(netmsg_t msg)
230 {
231 int cmd = msg->ctlinput.nm_cmd;
232 struct sockaddr *sa = msg->ctlinput.nm_arg;
233 void *d = msg->ctlinput.nm_extra;
234 struct ip6ctlparam *ip6cp = NULL;
235 const struct sockaddr_in6 *sa6_src = NULL;
236 inp_notify_t notify = in6_rtchange;
237
238 if (sa->sa_family != AF_INET6 ||
239 sa->sa_len != sizeof(struct sockaddr_in6))
240 goto out;
241
242 if ((unsigned)cmd >= PRC_NCMDS)
243 goto out;
244 if (PRC_IS_REDIRECT(cmd))
245 notify = in6_rtchange, d = NULL;
246 else if (cmd == PRC_HOSTDEAD)
247 d = NULL;
248 else if (inet6ctlerrmap[cmd] == 0)
249 goto out;
250
251 /* if the parameter is from icmp6, decode it. */
252 if (d != NULL) {
253 ip6cp = (struct ip6ctlparam *)d;
254 sa6_src = ip6cp->ip6c_src;
255 } else {
256 sa6_src = &sa6_any;
257 }
258
259 in6_pcbnotify(&ripcbinfo, sa, 0,
260 (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
261 out:
262 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
263 }
264
265 /*
266 * Generate IPv6 header and pass packet to ip6_output.
267 * Tack on options user may have setup with control call.
268 */
269 int
rip6_output(struct mbuf * m,struct socket * so,...)270 rip6_output(struct mbuf *m, struct socket *so, ...)
271 {
272 struct sockaddr_in6 *dstsock;
273 struct mbuf *control;
274 struct in6_addr *dst;
275 struct ip6_hdr *ip6;
276 struct inpcb *in6p;
277 u_int plen = m->m_pkthdr.len;
278 int error = 0;
279 struct ip6_pktopts opt, *optp = NULL;
280 struct ifnet *oifp = NULL;
281 int type = 0, code = 0; /* for ICMPv6 output statistics only */
282 int priv = 0;
283 __va_list ap;
284
285 __va_start(ap, so);
286 dstsock = __va_arg(ap, struct sockaddr_in6 *);
287 control = __va_arg(ap, struct mbuf *);
288 __va_end(ap);
289
290 if (IN6_IS_ADDR_V4MAPPED(&dstsock->sin6_addr)) {
291 error = EADDRNOTAVAIL;
292 goto bad;
293 }
294
295 in6p = so->so_pcb;
296
297 priv = 0;
298 if (so->so_cred->cr_uid == 0)
299 priv = 1;
300 dst = &dstsock->sin6_addr;
301 if (control) {
302 if ((error = ip6_setpktoptions(control, &opt,
303 in6p->in6p_outputopts,
304 so->so_proto->pr_protocol, priv)) != 0)
305 goto bad;
306 optp = &opt;
307 } else
308 optp = in6p->in6p_outputopts;
309
310 /*
311 * For an ICMPv6 packet, we should know its type and code
312 * to update statistics.
313 */
314 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
315 struct icmp6_hdr *icmp6;
316 if (m->m_len < sizeof(struct icmp6_hdr) &&
317 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
318 error = ENOBUFS;
319 goto bad;
320 }
321 icmp6 = mtod(m, struct icmp6_hdr *);
322 type = icmp6->icmp6_type;
323 code = icmp6->icmp6_code;
324 }
325
326 M_PREPEND(m, sizeof(*ip6), M_WAITOK);
327 ip6 = mtod(m, struct ip6_hdr *);
328
329 /*
330 * Next header might not be ICMP6 but use its pseudo header anyway.
331 */
332 ip6->ip6_dst = *dst;
333
334 /*
335 * If the scope of the destination is link-local, embed the interface
336 * index in the address.
337 *
338 * XXX advanced-api value overrides sin6_scope_id
339 */
340 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
341 struct in6_pktinfo *pi;
342
343 /*
344 * XXX Boundary check is assumed to be already done in
345 * ip6_setpktoptions().
346 */
347 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
348 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
349 oifp = ifindex2ifnet[pi->ipi6_ifindex];
350 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
351 in6p->in6p_moptions &&
352 in6p->in6p_moptions->im6o_multicast_ifp) {
353 oifp = in6p->in6p_moptions->im6o_multicast_ifp;
354 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
355 } else if (dstsock->sin6_scope_id) {
356 /* boundary check */
357 if (dstsock->sin6_scope_id < 0 ||
358 if_index < dstsock->sin6_scope_id) {
359 error = ENXIO; /* XXX EINVAL? */
360 goto bad;
361 }
362 ip6->ip6_dst.s6_addr16[1] =
363 htons(dstsock->sin6_scope_id & 0xffff); /* XXX */
364 }
365 }
366
367 /*
368 * Source address selection.
369 */
370 {
371 struct in6_addr *in6a;
372
373 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions,
374 &in6p->in6p_route, &in6p->in6p_laddr, &error, NULL))
375 == NULL) {
376 if (error == 0)
377 error = EADDRNOTAVAIL;
378 goto bad;
379 }
380 ip6->ip6_src = *in6a;
381 if (in6p->in6p_route.ro_rt)
382 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
383 }
384 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
385 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
386 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
387 (IPV6_VERSION & IPV6_VERSION_MASK);
388 /* ip6_plen will be filled in ip6_output, so not fill it here. */
389 ip6->ip6_nxt = in6p->in6p_ip6_nxt;
390 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
391
392 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
393 in6p->in6p_cksum != -1) {
394 struct mbuf *n;
395 int off;
396 u_int16_t *p;
397
398 /* compute checksum */
399 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
400 off = offsetof(struct icmp6_hdr, icmp6_cksum);
401 else
402 off = in6p->in6p_cksum;
403 if (plen < off + 1) {
404 error = EINVAL;
405 goto bad;
406 }
407 off += sizeof(struct ip6_hdr);
408
409 n = m;
410 while (n && n->m_len <= off) {
411 off -= n->m_len;
412 n = n->m_next;
413 }
414 if (!n)
415 goto bad;
416 p = (u_int16_t *)(mtod(n, caddr_t) + off);
417 *p = 0;
418 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
419 }
420
421 error = ip6_output(m, optp, &in6p->in6p_route, 0,
422 in6p->in6p_moptions, &oifp, in6p);
423 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
424 if (oifp)
425 icmp6_ifoutstat_inc(oifp, type, code);
426 icmp6stat.icp6s_outhist[type]++;
427 } else
428 rip6stat.rip6s_opackets++;
429
430 goto freectl;
431
432 bad:
433 if (m)
434 m_freem(m);
435
436 freectl:
437 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
438 RTFREE(optp->ip6po_route.ro_rt);
439 if (control) {
440 if (optp == &opt)
441 ip6_clearpktopts(optp, -1);
442 m_freem(control);
443 }
444 return (error);
445 }
446
447 /*
448 * Raw IPv6 socket option processing.
449 */
450 void
rip6_ctloutput(netmsg_t msg)451 rip6_ctloutput(netmsg_t msg)
452 {
453 struct socket *so = msg->ctloutput.base.nm_so;
454 struct sockopt *sopt = msg->ctloutput.nm_sopt;
455 int error;
456
457 if (sopt->sopt_level == IPPROTO_ICMPV6) {
458 /*
459 * XXX: is it better to call icmp6_ctloutput() directly
460 * from protosw?
461 */
462 icmp6_ctloutput(msg);
463 /* msg invalid now */
464 return;
465 }
466 if (sopt->sopt_level != IPPROTO_IPV6) {
467 error = EINVAL;
468 goto out;
469 }
470
471 error = 0;
472
473 switch (sopt->sopt_dir) {
474 case SOPT_GET:
475 switch (sopt->sopt_name) {
476 case MRT6_INIT:
477 case MRT6_DONE:
478 case MRT6_ADD_MIF:
479 case MRT6_DEL_MIF:
480 case MRT6_ADD_MFC:
481 case MRT6_DEL_MFC:
482 case MRT6_PIM:
483 error = ip6_mrouter_get(so, sopt);
484 break;
485 case IPV6_CHECKSUM:
486 error = ip6_raw_ctloutput(so, sopt);
487 break;
488 default:
489 error = ip6_ctloutput(so, sopt);
490 break;
491 }
492 break;
493
494 case SOPT_SET:
495 switch (sopt->sopt_name) {
496 case MRT6_INIT:
497 case MRT6_DONE:
498 case MRT6_ADD_MIF:
499 case MRT6_DEL_MIF:
500 case MRT6_ADD_MFC:
501 case MRT6_DEL_MFC:
502 case MRT6_PIM:
503 error = ip6_mrouter_set(so, sopt);
504 break;
505 case IPV6_CHECKSUM:
506 error = ip6_raw_ctloutput(so, sopt);
507 break;
508 default:
509 error = ip6_ctloutput(so, sopt);
510 break;
511 }
512 break;
513 }
514 out:
515 lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
516 }
517
518 static void
rip6_attach(netmsg_t msg)519 rip6_attach(netmsg_t msg)
520 {
521 struct socket *so = msg->attach.base.nm_so;
522 int proto = msg->attach.nm_proto;
523 struct pru_attach_info *ai = msg->attach.nm_ai;
524 struct inpcb *inp;
525 int error;
526
527 inp = so->so_pcb;
528 if (inp)
529 panic("rip6_attach");
530 error = caps_priv_check(ai->p_ucred,
531 SYSCAP_NONET_RAW | __SYSCAP_NULLCRED);
532 if (error)
533 goto out;
534
535 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
536 if (error)
537 goto out;
538 crit_enter();
539 error = in_pcballoc(so, &ripcbinfo);
540 crit_exit();
541 if (error)
542 goto out;
543 inp = (struct inpcb *)so->so_pcb;
544 inp->in6p_ip6_nxt = (long)proto;
545 inp->in6p_hops = -1; /* use kernel default */
546 inp->in6p_cksum = -1;
547 inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB,
548 M_NOWAIT);
549 if (inp->in6p_icmp6filt != NULL)
550 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
551 error = 0;
552 out:
553 lwkt_replymsg(&msg->attach.base.lmsg, error);
554 }
555
556 static void
rip6_detach(netmsg_t msg)557 rip6_detach(netmsg_t msg)
558 {
559 struct socket *so = msg->detach.base.nm_so;
560 struct inpcb *inp;
561
562 inp = so->so_pcb;
563 if (inp == NULL)
564 panic("rip6_detach");
565 /* xxx: RSVP */
566 if (so == ip6_mrouter)
567 ip6_mrouter_done();
568 if (inp->in6p_icmp6filt) {
569 kfree(inp->in6p_icmp6filt, M_PCB);
570 inp->in6p_icmp6filt = NULL;
571 }
572 in6_pcbdetach(inp);
573 lwkt_replymsg(&msg->detach.base.lmsg, 0);
574 }
575
576 /*
577 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
578 * will sofree() it when we return.
579 */
580 static void
rip6_abort(netmsg_t msg)581 rip6_abort(netmsg_t msg)
582 {
583 soisdisconnected(msg->abort.base.nm_so);
584 rip6_detach(msg);
585 /* msg invalid now */
586 }
587
588 static void
rip6_disconnect(netmsg_t msg)589 rip6_disconnect(netmsg_t msg)
590 {
591 struct socket *so = msg->disconnect.base.nm_so;
592 struct inpcb *inp = so->so_pcb;
593
594 if (so->so_state & SS_ISCONNECTED) {
595 inp->in6p_faddr = kin6addr_any;
596 soreference(so);
597 rip6_abort(msg);
598 /* msg invalid now */
599 sofree(so);
600 return;
601 }
602 lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN);
603 }
604
605 static void
rip6_bind(netmsg_t msg)606 rip6_bind(netmsg_t msg)
607 {
608 struct socket *so = msg->bind.base.nm_so;
609 struct sockaddr *nam = msg->bind.nm_nam;
610 struct inpcb *inp = so->so_pcb;
611 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
612 struct ifaddr *ia = NULL;
613 int error;
614
615 if (nam->sa_len != sizeof(*addr)) {
616 error = EINVAL;
617 goto out;
618 }
619 if (ifnet_array_isempty() || addr->sin6_family != AF_INET6) {
620 error = EADDRNOTAVAIL;
621 goto out;
622 }
623 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
624 error = EADDRNOTAVAIL;
625 goto out;
626 }
627 #ifdef ENABLE_DEFAULT_SCOPE
628 if (addr->sin6_scope_id == 0) { /* not change if specified */
629 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
630 }
631 #endif
632 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
633 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
634 error = EADDRNOTAVAIL;
635 goto out;
636 }
637 if (ia &&
638 ((struct in6_ifaddr *)ia)->ia6_flags &
639 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
640 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
641 error = EADDRNOTAVAIL;
642 goto out;
643 }
644 inp->in6p_laddr = addr->sin6_addr;
645 error = 0;
646 out:
647 lwkt_replymsg(&msg->bind.base.lmsg, error);
648 }
649
650 static void
rip6_connect(netmsg_t msg)651 rip6_connect(netmsg_t msg)
652 {
653 struct socket *so = msg->connect.base.nm_so;
654 struct sockaddr *nam = msg->connect.nm_nam;
655 struct inpcb *inp = so->so_pcb;
656 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
657 struct in6_addr *in6a = NULL;
658 int error = 0;
659 #ifdef ENABLE_DEFAULT_SCOPE
660 struct sockaddr_in6 tmp;
661 #endif
662
663 if (nam->sa_len != sizeof(*addr)) {
664 error = EINVAL;
665 goto out;
666 }
667 if (ifnet_array_isempty()) {
668 error = EADDRNOTAVAIL;
669 goto out;
670 }
671 if (addr->sin6_family != AF_INET6) {
672 error = EAFNOSUPPORT;
673 goto out;
674 }
675 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
676 error = EADDRNOTAVAIL;
677 goto out;
678 }
679 #ifdef ENABLE_DEFAULT_SCOPE
680 if (addr->sin6_scope_id == 0) { /* not change if specified */
681 /* avoid overwrites */
682 tmp = *addr;
683 addr = &tmp;
684 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
685 }
686 #endif
687 /* Source address selection. XXX: need pcblookup? */
688 in6a = in6_selectsrc(addr, inp->in6p_outputopts,
689 inp->in6p_moptions, &inp->in6p_route,
690 &inp->in6p_laddr, &error, NULL);
691 if (in6a == NULL) {
692 if (error == 0)
693 error = EADDRNOTAVAIL;
694 } else {
695 inp->in6p_laddr = *in6a;
696 inp->in6p_faddr = addr->sin6_addr;
697 soisconnected(so);
698 error = 0;
699 }
700 out:
701 lwkt_replymsg(&msg->connect.base.lmsg, error);
702 }
703
704 static void
rip6_shutdown(netmsg_t msg)705 rip6_shutdown(netmsg_t msg)
706 {
707 socantsendmore(msg->shutdown.base.nm_so);
708 lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
709 }
710
711 static void
rip6_send(netmsg_t msg)712 rip6_send(netmsg_t msg)
713 {
714 struct socket *so = msg->send.base.nm_so;
715 struct mbuf *m = msg->send.nm_m;
716 struct sockaddr *nam = msg->send.nm_addr;
717 struct mbuf *control = msg->send.nm_control;
718 struct inpcb *inp = so->so_pcb;
719 struct sockaddr_in6 tmp;
720 struct sockaddr_in6 *dst;
721 int error;
722
723 /* always copy sockaddr to avoid overwrites */
724 if (so->so_state & SS_ISCONNECTED) {
725 if (nam) {
726 m_freem(m);
727 error = EISCONN;
728 goto out;
729 }
730 /* XXX */
731 bzero(&tmp, sizeof(tmp));
732 tmp.sin6_family = AF_INET6;
733 tmp.sin6_len = sizeof(struct sockaddr_in6);
734 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
735 sizeof(struct in6_addr));
736 dst = &tmp;
737 } else {
738 if (nam == NULL) {
739 m_freem(m);
740 error = ENOTCONN;
741 goto out;
742 }
743 tmp = *(struct sockaddr_in6 *)nam;
744 dst = &tmp;
745 }
746 #ifdef ENABLE_DEFAULT_SCOPE
747 if (dst->sin6_scope_id == 0) { /* not change if specified */
748 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
749 }
750 #endif
751 error = rip6_output(m, so, dst, control);
752 out:
753 lwkt_replymsg(&msg->send.base.lmsg, error);
754 }
755
756 struct pr_usrreqs rip6_usrreqs = {
757 .pru_abort = rip6_abort,
758 .pru_accept = pr_generic_notsupp,
759 .pru_attach = rip6_attach,
760 .pru_bind = rip6_bind,
761 .pru_connect = rip6_connect,
762 .pru_connect2 = pr_generic_notsupp,
763 .pru_control = in6_control_dispatch,
764 .pru_detach = rip6_detach,
765 .pru_disconnect = rip6_disconnect,
766 .pru_listen = pr_generic_notsupp,
767 .pru_peeraddr = in6_setpeeraddr_dispatch,
768 .pru_rcvd = pr_generic_notsupp,
769 .pru_rcvoob = pr_generic_notsupp,
770 .pru_send = rip6_send,
771 .pru_sense = pru_sense_null,
772 .pru_shutdown = rip6_shutdown,
773 .pru_sockaddr = in6_setsockaddr_dispatch,
774 .pru_sosend = sosend,
775 .pru_soreceive = soreceive
776 };
777