raw_ip6.c revision 1.20 1 /* $NetBSD: raw_ip6.c,v 1.20 2000/02/26 09:09:18 itojun Exp $ */
2 /* $KAME: raw_ip6.c,v 1.23 2000/02/22 14:04:34 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 * Copyright (c) 1982, 1986, 1988, 1993
35 * The Regents of the University of California. All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. All advertising materials mentioning features or use of this software
46 * must display the following acknowledgement:
47 * This product includes software developed by the University of
48 * California, Berkeley and its contributors.
49 * 4. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * SUCH DAMAGE.
64 *
65 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
66 */
67
68 #include "opt_ipsec.h"
69
70 #include <sys/param.h>
71 #include <sys/malloc.h>
72 #include <sys/mbuf.h>
73 #include <sys/socket.h>
74 #include <sys/protosw.h>
75 #include <sys/socketvar.h>
76 #include <sys/errno.h>
77 #include <sys/systm.h>
78 #include <sys/proc.h>
79
80 #include <net/if.h>
81 #include <net/route.h>
82 #include <net/if_types.h>
83
84 #include <netinet/in.h>
85 #include <netinet/in_var.h>
86 #include <netinet/ip6.h>
87 #include <netinet6/ip6_var.h>
88 #include <netinet6/ip6_mroute.h>
89 #include <netinet/icmp6.h>
90 #include <netinet6/in6_pcb.h>
91 #include <netinet6/nd6.h>
92 #include <netinet6/ip6protosw.h>
93
94 #ifdef IPSEC
95 #include <netinet6/ipsec.h>
96 #endif /*IPSEC*/
97
98 #include <machine/stdarg.h>
99
100 #include "faith.h"
101
102 struct in6pcb rawin6pcb;
103 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
104
105 /*
106 * Raw interface to IP6 protocol.
107 */
108
109 /*
110 * Initialize raw connection block queue.
111 */
112 void
113 rip6_init()
114 {
115 rawin6pcb.in6p_next = rawin6pcb.in6p_prev = &rawin6pcb;
116 }
117
118 /*
119 * Setup generic address and protocol structures
120 * for raw_input routine, then pass them along with
121 * mbuf chain.
122 */
123 int
124 rip6_input(mp, offp, proto)
125 struct mbuf **mp;
126 int *offp, proto;
127 {
128 struct mbuf *m = *mp;
129 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
130 register struct in6pcb *in6p;
131 struct in6pcb *last = NULL;
132 struct sockaddr_in6 rip6src;
133 struct mbuf *opts = NULL;
134
135 #if defined(NFAITH) && 0 < NFAITH
136 if (m->m_pkthdr.rcvif) {
137 if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) {
138 /* send icmp6 host unreach? */
139 m_freem(m);
140 return IPPROTO_DONE;
141 }
142 }
143 #endif
144
145 /* Be proactive about malicious use of IPv4 mapped address */
146 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
147 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
148 /* XXX stat */
149 m_freem(m);
150 return IPPROTO_DONE;
151 }
152
153 bzero(&rip6src, sizeof(rip6src));
154 rip6src.sin6_len = sizeof(struct sockaddr_in6);
155 rip6src.sin6_family = AF_INET6;
156 rip6src.sin6_addr = ip6->ip6_src;
157 if (IN6_IS_SCOPE_LINKLOCAL(&rip6src.sin6_addr))
158 rip6src.sin6_addr.s6_addr16[1] = 0;
159 if (m->m_pkthdr.rcvif) {
160 if (IN6_IS_SCOPE_LINKLOCAL(&rip6src.sin6_addr))
161 rip6src.sin6_scope_id = m->m_pkthdr.rcvif->if_index;
162 else
163 rip6src.sin6_scope_id = 0;
164 } else
165 rip6src.sin6_scope_id = 0;
166
167 for (in6p = rawin6pcb.in6p_next;
168 in6p != &rawin6pcb; in6p = in6p->in6p_next) {
169 if (in6p->in6p_ip6.ip6_nxt &&
170 in6p->in6p_ip6.ip6_nxt != proto)
171 continue;
172 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
173 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
174 continue;
175 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
176 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
177 continue;
178 if (in6p->in6p_cksum != -1
179 && in6_cksum(m, ip6->ip6_nxt, *offp, m->m_pkthdr.len - *offp))
180 {
181 /* XXX bark something */
182 continue;
183 }
184 if (last) {
185 struct mbuf *n;
186 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
187 if (last->in6p_flags & IN6P_CONTROLOPTS)
188 ip6_savecontrol(last, &opts, ip6, n);
189 /* strip intermediate headers */
190 m_adj(n, *offp);
191 if (sbappendaddr(&last->in6p_socket->so_rcv,
192 (struct sockaddr *)&rip6src,
193 n, opts) == 0) {
194 /* should notify about lost packet */
195 m_freem(n);
196 if (opts)
197 m_freem(opts);
198 } else
199 sorwakeup(last->in6p_socket);
200 opts = NULL;
201 }
202 }
203 last = in6p;
204 }
205 if (last) {
206 if (last->in6p_flags & IN6P_CONTROLOPTS)
207 ip6_savecontrol(last, &opts, ip6, m);
208 /* strip intermediate headers */
209 m_adj(m, *offp);
210 if (sbappendaddr(&last->in6p_socket->so_rcv,
211 (struct sockaddr *)&rip6src, m, opts) == 0) {
212 m_freem(m);
213 if (opts)
214 m_freem(opts);
215 } else
216 sorwakeup(last->in6p_socket);
217 } else {
218 if (proto == IPPROTO_NONE)
219 m_freem(m);
220 else {
221 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
222 icmp6_error(m, ICMP6_PARAM_PROB,
223 ICMP6_PARAMPROB_NEXTHEADER,
224 prvnxtp - mtod(m, char *));
225 }
226 ip6stat.ip6s_delivered--;
227 }
228 return IPPROTO_DONE;
229 }
230
231 void
232 rip6_ctlinput(cmd, sa, d)
233 int cmd;
234 struct sockaddr *sa;
235 void *d;
236 {
237 struct sockaddr_in6 sa6;
238 register struct ip6_hdr *ip6;
239 struct mbuf *m;
240 int off;
241
242 if (sa->sa_family != AF_INET6 ||
243 sa->sa_len != sizeof(struct sockaddr_in6))
244 return;
245
246 if (!PRC_IS_REDIRECT(cmd) &&
247 ((unsigned)cmd >= PRC_NCMDS || inet6ctlerrmap[cmd] == 0))
248 return;
249
250 /* if the parameter is from icmp6, decode it. */
251 if (d != NULL) {
252 struct ip6ctlparam *ip6cp = (struct ip6ctlparam *)d;
253 m = ip6cp->ip6c_m;
254 ip6 = ip6cp->ip6c_ip6;
255 off = ip6cp->ip6c_off;
256 } else {
257 m = NULL;
258 ip6 = NULL;
259 }
260
261 /* translate addresses into internal form */
262 sa6 = *(struct sockaddr_in6 *)sa;
263 if (IN6_IS_ADDR_LINKLOCAL(&sa6.sin6_addr) && m && m->m_pkthdr.rcvif)
264 sa6.sin6_addr.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index);
265
266 if (ip6) {
267 /*
268 * XXX: We assume that when IPV6 is non NULL,
269 * M and OFF are valid.
270 */
271 struct in6_addr s;
272
273 /* translate addresses into internal form */
274 memcpy(&s, &ip6->ip6_src, sizeof(s));
275 if (IN6_IS_ADDR_LINKLOCAL(&s))
276 s.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index);
277
278 (void) in6_pcbnotify(&rawin6pcb, (struct sockaddr *)&sa6,
279 0, &s, 0, cmd, in6_rtchange);
280 } else {
281 (void) in6_pcbnotify(&rawin6pcb, (struct sockaddr *)&sa6, 0,
282 &zeroin6_addr, 0, cmd, in6_rtchange);
283 }
284 }
285
286 /*
287 * Generate IPv6 header and pass packet to ip6_output.
288 * Tack on options user may have setup with control call.
289 */
290 int
291 #if __STDC__
292 rip6_output(struct mbuf *m, ...)
293 #else
294 rip6_output(m, va_alist)
295 struct mbuf *m;
296 va_dcl
297 #endif
298 {
299 struct socket *so;
300 struct sockaddr_in6 *dstsock;
301 struct mbuf *control;
302 struct in6_addr *dst;
303 struct ip6_hdr *ip6;
304 struct in6pcb *in6p;
305 u_int plen = m->m_pkthdr.len;
306 int error = 0;
307 struct ip6_pktopts opt, *optp = NULL;
308 struct ifnet *oifp = NULL;
309 int type, code; /* for ICMPv6 output statistics only */
310 int priv = 0;
311 va_list ap;
312
313 va_start(ap, m);
314 so = va_arg(ap, struct socket *);
315 dstsock = va_arg(ap, struct sockaddr_in6 *);
316 control = va_arg(ap, struct mbuf *);
317 va_end(ap);
318
319 in6p = sotoin6pcb(so);
320
321 priv = 0;
322 {
323 struct proc *p = curproc; /* XXX */
324
325 if (p && !suser(p->p_ucred, &p->p_acflag))
326 priv = 1;
327 }
328 dst = &dstsock->sin6_addr;
329 if (control) {
330 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0)
331 goto bad;
332 optp = &opt;
333 } else
334 optp = in6p->in6p_outputopts;
335
336 /*
337 * For an ICMPv6 packet, we should know its type and code
338 * to update statistics.
339 */
340 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
341 struct icmp6_hdr *icmp6;
342 if (m->m_len < sizeof(struct icmp6_hdr) &&
343 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
344 error = ENOBUFS;
345 goto bad;
346 }
347 icmp6 = mtod(m, struct icmp6_hdr *);
348 type = icmp6->icmp6_type;
349 code = icmp6->icmp6_code;
350 }
351
352 M_PREPEND(m, sizeof(*ip6), M_WAIT);
353 ip6 = mtod(m, struct ip6_hdr *);
354
355 /*
356 * Next header might not be ICMP6 but use its pseudo header anyway.
357 */
358 ip6->ip6_dst = *dst;
359
360 /*
361 * If the scope of the destination is link-local, embed the interface
362 * index in the address.
363 *
364 * XXX advanced-api value overrides sin6_scope_id
365 */
366 if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst) ||
367 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) {
368 struct in6_pktinfo *pi;
369
370 /*
371 * XXX Boundary check is assumed to be already done in
372 * ip6_setpktoptions().
373 */
374 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
375 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
376 oifp = ifindex2ifnet[pi->ipi6_ifindex];
377 }
378 else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
379 in6p->in6p_moptions &&
380 in6p->in6p_moptions->im6o_multicast_ifp) {
381 oifp = in6p->in6p_moptions->im6o_multicast_ifp;
382 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
383 } else if (dstsock->sin6_scope_id) {
384 /* boundary check */
385 if (dstsock->sin6_scope_id < 0
386 || if_index < dstsock->sin6_scope_id) {
387 error = ENXIO; /* XXX EINVAL? */
388 goto bad;
389 }
390 ip6->ip6_dst.s6_addr16[1]
391 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
392 }
393 }
394
395 /*
396 * Source address selection.
397 */
398 {
399 struct in6_addr *in6a;
400
401 if ((in6a = in6_selectsrc(dstsock, optp,
402 in6p->in6p_moptions,
403 &in6p->in6p_route,
404 &in6p->in6p_laddr,
405 &error)) == 0) {
406 if (error == 0)
407 error = EADDRNOTAVAIL;
408 goto bad;
409 }
410 ip6->ip6_src = *in6a;
411 if (in6p->in6p_route.ro_rt)
412 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
413 }
414
415 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK;
416 ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
417 ip6->ip6_vfc |= IPV6_VERSION;
418 #if 0 /* ip6_plen will be filled in ip6_output. */
419 ip6->ip6_plen = htons((u_short)plen);
420 #endif
421 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt;
422 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
423
424 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
425 in6p->in6p_cksum != -1) {
426 struct mbuf *n;
427 int off;
428 u_int16_t *p;
429
430 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) /* XXX */
431
432 /* compute checksum */
433 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
434 off = offsetof(struct icmp6_hdr, icmp6_cksum);
435 else
436 off = in6p->in6p_cksum;
437 if (plen < off + 1) {
438 error = EINVAL;
439 goto bad;
440 }
441 off += sizeof(struct ip6_hdr);
442
443 n = m;
444 while (n && n->m_len <= off) {
445 off -= n->m_len;
446 n = n->m_next;
447 }
448 if (!n)
449 goto bad;
450 p = (u_int16_t *)(mtod(n, caddr_t) + off);
451 *p = 0;
452 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
453 }
454
455 #ifdef IPSEC
456 m->m_pkthdr.rcvif = (struct ifnet *)so;
457 #endif /*IPSEC*/
458
459 error = ip6_output(m, optp, &in6p->in6p_route, 0, in6p->in6p_moptions,
460 &oifp);
461 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
462 if (oifp)
463 icmp6_ifoutstat_inc(oifp, type, code);
464 icmp6stat.icp6s_outhist[type]++;
465 }
466
467 goto freectl;
468
469 bad:
470 if (m)
471 m_freem(m);
472
473 freectl:
474 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
475 RTFREE(optp->ip6po_route.ro_rt);
476 if (control)
477 m_freem(control);
478 return(error);
479 }
480
481 /*
482 * Raw IPv6 socket option processing.
483 */
484 int
485 rip6_ctloutput(op, so, level, optname, m)
486 int op;
487 struct socket *so;
488 int level, optname;
489 struct mbuf **m;
490 {
491 int error = 0;
492
493 switch(level) {
494 case IPPROTO_IPV6:
495 switch(optname) {
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 if (op == PRCO_SETOPT) {
504 error = ip6_mrouter_set(optname, so, *m);
505 if (*m)
506 (void)m_free(*m);
507 } else if (op == PRCO_GETOPT) {
508 error = ip6_mrouter_get(optname, so, m);
509 } else
510 error = EINVAL;
511 return (error);
512 }
513 return (ip6_ctloutput(op, so, level, optname, m));
514 /* NOTREACHED */
515
516 case IPPROTO_ICMPV6:
517 /*
518 * XXX: is it better to call icmp6_ctloutput() directly
519 * from protosw?
520 */
521 return(icmp6_ctloutput(op, so, level, optname, m));
522
523 default:
524 if (op == PRCO_SETOPT && *m)
525 (void)m_free(*m);
526 return(EINVAL);
527 }
528 }
529
530 extern u_long rip6_sendspace;
531 extern u_long rip6_recvspace;
532
533 int
534 rip6_usrreq(so, req, m, nam, control, p)
535 register struct socket *so;
536 int req;
537 struct mbuf *m, *nam, *control;
538 struct proc *p;
539 {
540 register struct in6pcb *in6p = sotoin6pcb(so);
541 int s;
542 int error = 0;
543 /* extern struct socket *ip6_mrouter; */ /* xxx */
544 int priv;
545
546 priv = 0;
547 if (p && !suser(p->p_ucred, &p->p_acflag))
548 priv++;
549
550 if (req == PRU_CONTROL)
551 return (in6_control(so, (u_long)m, (caddr_t)nam,
552 (struct ifnet *)control, p));
553
554 if (req == PRU_PURGEIF) {
555 in6_purgeif((struct ifnet *)control);
556 in6_pcbpurgeif(&rawin6pcb, (struct ifnet *)control);
557 return (0);
558 }
559
560 switch (req) {
561 case PRU_ATTACH:
562 if (in6p)
563 panic("rip6_attach");
564 if (!priv) {
565 error = EACCES;
566 break;
567 }
568 s = splsoftnet();
569 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) ||
570 (error = in6_pcballoc(so, &rawin6pcb))) {
571 splx(s);
572 break;
573 }
574 splx(s);
575 in6p = sotoin6pcb(so);
576 in6p->in6p_ip6.ip6_nxt = (long)nam;
577 in6p->in6p_cksum = -1;
578 #ifdef IPSEC
579 error = ipsec_init_policy(so, &in6p->in6p_sp);
580 if (error != 0) {
581 in6_pcbdetach(in6p);
582 break;
583 }
584 #endif /*IPSEC*/
585
586 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *,
587 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
588 if (in6p->in6p_icmp6filt == NULL) {
589 in6_pcbdetach(in6p);
590 error = ENOMEM;
591 break;
592 }
593 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt);
594 break;
595
596 case PRU_DISCONNECT:
597 if ((so->so_state & SS_ISCONNECTED) == 0) {
598 error = ENOTCONN;
599 break;
600 }
601 in6p->in6p_faddr = in6addr_any;
602 so->so_state &= ~SS_ISCONNECTED; /* XXX */
603 break;
604
605 case PRU_ABORT:
606 soisdisconnected(so);
607 /* Fallthrough */
608 case PRU_DETACH:
609 if (in6p == 0)
610 panic("rip6_detach");
611 if (so == ip6_mrouter)
612 ip6_mrouter_done();
613 /* xxx: RSVP */
614 if (in6p->in6p_icmp6filt) {
615 FREE(in6p->in6p_icmp6filt, M_PCB);
616 in6p->in6p_icmp6filt = NULL;
617 }
618 in6_pcbdetach(in6p);
619 break;
620
621 case PRU_BIND:
622 {
623 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *);
624 struct ifaddr *ia = NULL;
625
626 if (nam->m_len != sizeof(*addr)) {
627 error = EINVAL;
628 break;
629 }
630 if ((ifnet.tqh_first == 0) ||
631 (addr->sin6_family != AF_INET6) ||
632 (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
633 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0)) {
634 error = EADDRNOTAVAIL;
635 break;
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 break;
643 }
644 in6p->in6p_laddr = addr->sin6_addr;
645 break;
646 }
647
648 case PRU_CONNECT:
649 {
650 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *);
651 struct in6_addr *in6a = NULL;
652
653 if (nam->m_len != sizeof(*addr)) {
654 error = EINVAL;
655 break;
656 }
657 if (ifnet.tqh_first == 0) {
658 error = EADDRNOTAVAIL;
659 break;
660 }
661 if (addr->sin6_family != AF_INET6) {
662 error = EAFNOSUPPORT;
663 break;
664 }
665
666 /* Source address selection. XXX: need pcblookup? */
667 in6a = in6_selectsrc(addr, in6p->in6p_outputopts,
668 in6p->in6p_moptions,
669 &in6p->in6p_route,
670 &in6p->in6p_laddr,
671 &error);
672 if (in6a == NULL) {
673 if (error == 0)
674 error = EADDRNOTAVAIL;
675 break;
676 }
677 in6p->in6p_laddr = *in6a;
678 in6p->in6p_faddr = addr->sin6_addr;
679 soisconnected(so);
680 break;
681 }
682
683 case PRU_CONNECT2:
684 error = EOPNOTSUPP;
685 break;
686
687 /*
688 * Mark the connection as being incapable of futther input.
689 */
690 case PRU_SHUTDOWN:
691 socantsendmore(so);
692 break;
693 /*
694 * Ship a packet out. The appropriate raw output
695 * routine handles any messaging necessary.
696 */
697 case PRU_SEND:
698 {
699 struct sockaddr_in6 tmp;
700 struct sockaddr_in6 *dst;
701
702 if (so->so_state & SS_ISCONNECTED) {
703 if (nam) {
704 error = EISCONN;
705 break;
706 }
707 /* XXX */
708 bzero(&tmp, sizeof(tmp));
709 tmp.sin6_family = AF_INET6;
710 tmp.sin6_len = sizeof(struct sockaddr_in6);
711 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr,
712 sizeof(struct in6_addr));
713 dst = &tmp;
714 } else {
715 if (nam == NULL) {
716 error = ENOTCONN;
717 break;
718 }
719 dst = mtod(nam, struct sockaddr_in6 *);
720 }
721 error = rip6_output(m, so, dst, control);
722 m = NULL;
723 break;
724 }
725
726 case PRU_SENSE:
727 /*
728 * stat: don't bother with a blocksize
729 */
730 return(0);
731 /*
732 * Not supported.
733 */
734 case PRU_RCVOOB:
735 case PRU_RCVD:
736 case PRU_LISTEN:
737 case PRU_ACCEPT:
738 case PRU_SENDOOB:
739 error = EOPNOTSUPP;
740 break;
741
742 case PRU_SOCKADDR:
743 in6_setsockaddr(in6p, nam);
744 break;
745
746 case PRU_PEERADDR:
747 in6_setpeeraddr(in6p, nam);
748 break;
749
750 default:
751 panic("rip6_usrreq");
752 }
753 if (m != NULL)
754 m_freem(m);
755 return(error);
756 }
757