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