c822786afcecdb188d31e6c37457af85dd0cd193
[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. All advertising materials mentioning features or use of this software
45  *    must display the following acknowledgement:
46  *      This product includes software developed by the University of
47  *      California, Berkeley and its contributors.
48  * 4. Neither the name of the University nor the names of its contributors
49  *    may be used to endorse or promote products derived from this software
50  *    without specific prior written permission.
51  *
52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62  * SUCH DAMAGE.
63  *
64  *      @(#)raw_ip.c    8.2 (Berkeley) 1/4/94
65  */
66
67 #include "opt_ipsec.h"
68 #include "opt_inet6.h"
69
70 #include <sys/param.h>
71 #include <sys/malloc.h>
72 #include <sys/proc.h>
73 #include <sys/priv.h>
74 #include <sys/mbuf.h>
75 #include <sys/socket.h>
76 #include <sys/jail.h>
77 #include <sys/protosw.h>
78 #include <sys/socketvar.h>
79 #include <sys/errno.h>
80 #include <sys/systm.h>
81
82 #include <sys/thread2.h>
83 #include <sys/socketvar2.h>
84 #include <sys/msgport2.h>
85
86 #include <net/if.h>
87 #include <net/route.h>
88 #include <net/if_types.h>
89
90 #include <netinet/in.h>
91 #include <netinet/in_var.h>
92 #include <netinet/in_systm.h>
93 #include <netinet/ip6.h>
94 #include <netinet6/ip6_var.h>
95 #include <netinet6/ip6_mroute.h>
96 #include <netinet/icmp6.h>
97 #include <netinet/in_pcb.h>
98 #include <netinet6/in6_pcb.h>
99 #include <netinet6/nd6.h>
100 #include <netinet6/ip6protosw.h>
101 #ifdef ENABLE_DEFAULT_SCOPE
102 #include <netinet6/scope6_var.h>
103 #endif
104 #include <netinet6/raw_ip6.h>
105
106 #ifdef IPSEC
107 #include <netinet6/ipsec.h>
108 #include <netinet6/ipsec6.h>
109 #endif /*IPSEC*/
110
111 #ifdef FAST_IPSEC
112 #include <netproto/ipsec/ipsec.h>
113 #include <netproto/ipsec/ipsec6.h>
114 #endif /* FAST_IPSEC */
115
116 #include <machine/stdarg.h>
117
118 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
119 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
120
121 /*
122  * Raw interface to IP6 protocol.
123  */
124
125 extern struct   inpcbinfo ripcbinfo;
126 extern u_long   rip_sendspace;
127 extern u_long   rip_recvspace;
128
129 struct rip6stat rip6stat;
130
131 /*
132  * Setup generic address and protocol structures
133  * for raw_input routine, then pass them along with
134  * mbuf chain.
135  */
136 int
137 rip6_input(struct mbuf **mp, int *offp, int proto)
138 {
139         struct mbuf *m = *mp;
140         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
141         struct inpcb *in6p;
142         struct inpcb *last = NULL;
143         struct mbuf *opts = NULL;
144         struct sockaddr_in6 rip6src;
145
146         rip6stat.rip6s_ipackets++;
147
148         if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
149                 /* XXX send icmp6 host/port unreach? */
150                 m_freem(m);
151                 return IPPROTO_DONE;
152         }
153
154         init_sin6(&rip6src, m); /* general init */
155
156         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
157                 if (in6p->in6p_flags & INP_PLACEMARKER)
158                         continue;
159                 if (!(in6p->in6p_vflag & INP_IPV6))
160                         continue;
161                 if (in6p->in6p_ip6_nxt &&
162                     in6p->in6p_ip6_nxt != proto)
163                         continue;
164                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
165                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
166                         continue;
167                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
168                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
169                         continue;
170                 if (in6p->in6p_cksum != -1) {
171                         rip6stat.rip6s_isum++;
172                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
173                             m->m_pkthdr.len - *offp)) {
174                                 rip6stat.rip6s_badsum++;
175                                 continue;
176                         }
177                 }
178                 if (last) {
179                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
180
181 #ifdef IPSEC
182                         /*
183                          * Check AH/ESP integrity.
184                          */
185                         if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
186                                 m_freem(n);
187                                 ipsec6stat.in_polvio++;
188                                 /* do not inject data into pcb */
189                         } else
190 #endif /*IPSEC*/
191 #ifdef FAST_IPSEC
192                         /*
193                          * Check AH/ESP integrity.
194                          */
195                         if (n && ipsec6_in_reject(n, last)) {
196                                 m_freem(n);
197                                 /* do not inject data into pcb */
198                         } else
199 #endif /*FAST_IPSEC*/
200                         if (n) {
201                                 struct socket *so;
202
203                                 so = last->in6p_socket;
204                                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
205                                     (so->so_options & SO_TIMESTAMP)) {
206                                         ip6_savecontrol(last, &opts, ip6, n);
207                                 }
208                                 /* strip intermediate headers */
209                                 m_adj(n, *offp);
210                                 lwkt_gettoken(&so->so_rcv.ssb_token);
211                                 if (ssb_appendaddr(&so->so_rcv,
212                                                 (struct sockaddr *)&rip6src,
213                                                  n, opts) == 0) {
214                                         m_freem(n);
215                                         if (opts)
216                                                 m_freem(opts);
217                                         rip6stat.rip6s_fullsock++;
218                                 } else {
219                                         sorwakeup(so);
220                                 }
221                                 lwkt_reltoken(&so->so_rcv.ssb_token);
222                                 opts = NULL;
223                         }
224                 }
225                 last = in6p;
226         }
227 #ifdef IPSEC
228         /*
229          * Check AH/ESP integrity.
230          */
231         if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
232                 m_freem(m);
233                 ipsec6stat.in_polvio++;
234                 ip6stat.ip6s_delivered--;
235                 /* do not inject data into pcb */
236         } else
237 #endif /*IPSEC*/
238 #ifdef FAST_IPSEC
239         /*
240          * Check AH/ESP integrity.
241          */
242         if (last && ipsec6_in_reject(m, last)) {
243                 m_freem(m);
244                 ip6stat.ip6s_delivered--;
245                 /* do not inject data into pcb */
246         } else
247 #endif /*FAST_IPSEC*/
248         if (last) {
249                 struct socket *so;
250
251                 so = last->in6p_socket;
252                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
253                     (so->so_options & SO_TIMESTAMP)) {
254                         ip6_savecontrol(last, &opts, ip6, m);
255                 }
256                 /* strip intermediate headers */
257                 m_adj(m, *offp);
258                 lwkt_gettoken(&so->so_rcv.ssb_token);
259                 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src,
260                                    m, opts) == 0) {
261                         m_freem(m);
262                         if (opts)
263                                 m_freem(opts);
264                         rip6stat.rip6s_fullsock++;
265                 } else {
266                         sorwakeup(so);
267                 }
268                 lwkt_reltoken(&so->so_rcv.ssb_token);
269         } else {
270                 rip6stat.rip6s_nosock++;
271                 if (m->m_flags & M_MCAST)
272                         rip6stat.rip6s_nosockmcast++;
273                 if (proto == IPPROTO_NONE)
274                         m_freem(m);
275                 else {
276                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
277                         icmp6_error(m, ICMP6_PARAM_PROB,
278                                     ICMP6_PARAMPROB_NEXTHEADER,
279                                     prvnxtp - mtod(m, char *));
280                 }
281                 ip6stat.ip6s_delivered--;
282         }
283         return IPPROTO_DONE;
284 }
285
286 void
287 rip6_ctlinput(netmsg_t msg)
288 {
289         int cmd = msg->ctlinput.nm_cmd;
290         struct sockaddr *sa = msg->ctlinput.nm_arg;
291         void *d = msg->ctlinput.nm_extra;
292         struct ip6_hdr *ip6;
293         struct mbuf *m;
294         int off = 0;
295         struct ip6ctlparam *ip6cp = NULL;
296         const struct sockaddr_in6 *sa6_src = NULL;
297         void (*notify) (struct inpcb *, int) = in6_rtchange;
298
299         if (sa->sa_family != AF_INET6 ||
300             sa->sa_len != sizeof(struct sockaddr_in6))
301                 goto out;
302
303         if ((unsigned)cmd >= PRC_NCMDS)
304                 goto out;
305         if (PRC_IS_REDIRECT(cmd))
306                 notify = in6_rtchange, d = NULL;
307         else if (cmd == PRC_HOSTDEAD)
308                 d = NULL;
309         else if (inet6ctlerrmap[cmd] == 0)
310                 goto out;
311
312         /* if the parameter is from icmp6, decode it. */
313         if (d != NULL) {
314                 ip6cp = (struct ip6ctlparam *)d;
315                 m = ip6cp->ip6c_m;
316                 ip6 = ip6cp->ip6c_ip6;
317                 off = ip6cp->ip6c_off;
318                 sa6_src = ip6cp->ip6c_src;
319         } else {
320                 m = NULL;
321                 ip6 = NULL;
322                 sa6_src = &sa6_any;
323         }
324
325         in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0,
326                       (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
327 out:
328         lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
329 }
330
331 /*
332  * Generate IPv6 header and pass packet to ip6_output.
333  * Tack on options user may have setup with control call.
334  */
335 int
336 rip6_output(struct mbuf *m, struct socket *so, ...)
337 {
338         struct sockaddr_in6 *dstsock;
339         struct mbuf *control;
340         struct in6_addr *dst;
341         struct ip6_hdr *ip6;
342         struct inpcb *in6p;
343         u_int   plen = m->m_pkthdr.len;
344         int error = 0;
345         struct ip6_pktopts opt, *optp = NULL;
346         struct ifnet *oifp = NULL;
347         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
348         int priv = 0;
349         __va_list ap;
350
351         __va_start(ap, so);
352         dstsock = __va_arg(ap, struct sockaddr_in6 *);
353         control = __va_arg(ap, struct mbuf *);
354         __va_end(ap);
355
356         in6p = so->so_pcb;
357
358         priv = 0;
359         if (so->so_cred->cr_uid == 0)
360                 priv = 1;
361         dst = &dstsock->sin6_addr;
362         if (control) {
363                 if ((error = ip6_setpktoptions(control, &opt,
364                     in6p->in6p_outputopts, 
365                     so->so_proto->pr_protocol, priv)) != 0)
366                         goto bad;
367                 optp = &opt;
368         } else
369                 optp = in6p->in6p_outputopts;
370
371         /*
372          * For an ICMPv6 packet, we should know its type and code
373          * to update statistics.
374          */
375         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
376                 struct icmp6_hdr *icmp6;
377                 if (m->m_len < sizeof(struct icmp6_hdr) &&
378                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
379                         error = ENOBUFS;
380                         goto bad;
381                 }
382                 icmp6 = mtod(m, struct icmp6_hdr *);
383                 type = icmp6->icmp6_type;
384                 code = icmp6->icmp6_code;
385         }
386
387         M_PREPEND(m, sizeof(*ip6), MB_WAIT);
388         ip6 = mtod(m, struct ip6_hdr *);
389
390         /*
391          * Next header might not be ICMP6 but use its pseudo header anyway.
392          */
393         ip6->ip6_dst = *dst;
394
395         /*
396          * If the scope of the destination is link-local, embed the interface
397          * index in the address.
398          *
399          * XXX advanced-api value overrides sin6_scope_id
400          */
401         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
402                 struct in6_pktinfo *pi;
403
404                 /*
405                  * XXX Boundary check is assumed to be already done in
406                  * ip6_setpktoptions().
407                  */
408                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
409                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
410                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
411                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
412                          in6p->in6p_moptions &&
413                          in6p->in6p_moptions->im6o_multicast_ifp) {
414                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
415                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
416                 } else if (dstsock->sin6_scope_id) {
417                         /* boundary check */
418                         if (dstsock->sin6_scope_id < 0
419                          || if_index < dstsock->sin6_scope_id) {
420                                 error = ENXIO;  /* XXX EINVAL? */
421                                 goto bad;
422                         }
423                         ip6->ip6_dst.s6_addr16[1]
424                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
425                 }
426         }
427
428         /*
429          * Source address selection.
430          */
431         {
432                 struct in6_addr *in6a;
433
434                 if ((in6a = in6_selectsrc(dstsock, optp,
435                                           in6p->in6p_moptions,
436                                           &in6p->in6p_route,
437                                           &in6p->in6p_laddr,
438                                           &error, NULL)) == NULL) {
439                         if (error == 0)
440                                 error = EADDRNOTAVAIL;
441                         goto bad;
442                 }
443                 ip6->ip6_src = *in6a;
444                 if (in6p->in6p_route.ro_rt)
445                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
446         }
447         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
448                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
449         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
450                 (IPV6_VERSION & IPV6_VERSION_MASK);
451         /* ip6_plen will be filled in ip6_output, so not fill it here. */
452         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
453         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
454
455         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
456             in6p->in6p_cksum != -1) {
457                 struct mbuf *n;
458                 int off;
459                 u_int16_t *p;
460
461                 /* compute checksum */
462                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
463                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
464                 else
465                         off = in6p->in6p_cksum;
466                 if (plen < off + 1) {
467                         error = EINVAL;
468                         goto bad;
469                 }
470                 off += sizeof(struct ip6_hdr);
471
472                 n = m;
473                 while (n && n->m_len <= off) {
474                         off -= n->m_len;
475                         n = n->m_next;
476                 }
477                 if (!n)
478                         goto bad;
479                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
480                 *p = 0;
481                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
482         }
483
484         error = ip6_output(m, optp, &in6p->in6p_route, 0,
485                            in6p->in6p_moptions, &oifp, in6p);
486         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
487                 if (oifp)
488                         icmp6_ifoutstat_inc(oifp, type, code);
489                 icmp6stat.icp6s_outhist[type]++;
490         } else
491                 rip6stat.rip6s_opackets++;
492
493         goto freectl;
494
495 bad:
496         if (m)
497                 m_freem(m);
498
499 freectl:
500         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
501                 RTFREE(optp->ip6po_route.ro_rt);
502         if (control) {
503                 if (optp == &opt)
504                         ip6_clearpktopts(optp, -1);
505                 m_freem(control);
506         }
507         return (error);
508 }
509
510 /*
511  * Raw IPv6 socket option processing.
512  */
513 void
514 rip6_ctloutput(netmsg_t msg)
515 {
516         struct socket *so = msg->ctloutput.base.nm_so;;
517         struct sockopt *sopt = msg->ctloutput.nm_sopt;
518         int error;
519
520         if (sopt->sopt_level == IPPROTO_ICMPV6) {
521                 /*
522                  * XXX: is it better to call icmp6_ctloutput() directly
523                  * from protosw?
524                  */
525                 icmp6_ctloutput(msg);
526                 /* msg invalid now */
527                 return;
528         }
529         if (sopt->sopt_level != IPPROTO_IPV6) {
530                 error = EINVAL;
531                 goto out;
532         }
533
534         error = 0;
535
536         switch (sopt->sopt_dir) {
537         case SOPT_GET:
538                 switch (sopt->sopt_name) {
539                 case MRT6_INIT:
540                 case MRT6_DONE:
541                 case MRT6_ADD_MIF:
542                 case MRT6_DEL_MIF:
543                 case MRT6_ADD_MFC:
544                 case MRT6_DEL_MFC:
545                 case MRT6_PIM:
546                         error = ip6_mrouter_get(so, sopt);
547                         break;
548                 case IPV6_CHECKSUM:
549                         error = ip6_raw_ctloutput(so, sopt);
550                         break;
551                 default:
552                         error = ip6_ctloutput(so, sopt);
553                         break;
554                 }
555                 break;
556
557         case SOPT_SET:
558                 switch (sopt->sopt_name) {
559                 case MRT6_INIT:
560                 case MRT6_DONE:
561                 case MRT6_ADD_MIF:
562                 case MRT6_DEL_MIF:
563                 case MRT6_ADD_MFC:
564                 case MRT6_DEL_MFC:
565                 case MRT6_PIM:
566                         error = ip6_mrouter_set(so, sopt);
567                         break;
568                 case IPV6_CHECKSUM:
569                         error = ip6_raw_ctloutput(so, sopt);
570                         break;
571                 default:
572                         error = ip6_ctloutput(so, sopt);
573                         break;
574                 }
575                 break;
576         }
577 out:
578         lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
579 }
580
581 static void
582 rip6_attach(netmsg_t msg)
583 {
584         struct socket *so = msg->attach.base.nm_so;
585         int proto = msg->attach.nm_proto;
586         struct pru_attach_info *ai = msg->attach.nm_ai;
587         struct inpcb *inp;
588         int error;
589
590         inp = so->so_pcb;
591         if (inp)
592                 panic("rip6_attach");
593         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
594         if (error)
595                 goto out;
596
597         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
598         if (error)
599                 goto out;
600         crit_enter();
601         error = in_pcballoc(so, &ripcbinfo);
602         crit_exit();
603         if (error)
604                 goto out;
605         inp = (struct inpcb *)so->so_pcb;
606         inp->inp_vflag |= INP_IPV6;
607         inp->in6p_ip6_nxt = (long)proto;
608         inp->in6p_hops = -1;    /* use kernel default */
609         inp->in6p_cksum = -1;
610         inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB,
611                                       M_NOWAIT);
612         if (inp->in6p_icmp6filt != NULL)
613                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
614         error = 0;
615 out:
616         lwkt_replymsg(&msg->attach.base.lmsg, error);
617 }
618
619 static void
620 rip6_detach(netmsg_t msg)
621 {
622         struct socket *so = msg->detach.base.nm_so;
623         struct inpcb *inp;
624
625         inp = so->so_pcb;
626         if (inp == NULL)
627                 panic("rip6_detach");
628         /* xxx: RSVP */
629         if (so == ip6_mrouter)
630                 ip6_mrouter_done();
631         if (inp->in6p_icmp6filt) {
632                 kfree(inp->in6p_icmp6filt, M_PCB);
633                 inp->in6p_icmp6filt = NULL;
634         }
635         in6_pcbdetach(inp);
636         lwkt_replymsg(&msg->detach.base.lmsg, 0);
637 }
638
639 /*
640  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
641  *       will sofree() it when we return.
642  */
643 static void
644 rip6_abort(netmsg_t msg)
645 {
646         soisdisconnected(msg->abort.base.nm_so);
647         rip6_detach(msg);
648         /* msg invalid now */
649 }
650
651 static void
652 rip6_disconnect(netmsg_t msg)
653 {
654         struct socket *so = msg->disconnect.base.nm_so;
655         struct inpcb *inp = so->so_pcb;
656
657         if (so->so_state & SS_ISCONNECTED) {
658                 inp->in6p_faddr = kin6addr_any;
659                 soreference(so);
660                 rip6_abort(msg);
661                 /* msg invalid now */
662                 sofree(so);
663                 return;
664         }
665         lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN);
666 }
667
668 static void
669 rip6_bind(netmsg_t msg)
670 {
671         struct socket *so = msg->bind.base.nm_so;
672         struct sockaddr *nam = msg->bind.nm_nam;
673         struct inpcb *inp = so->so_pcb;
674         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
675         struct ifaddr *ia = NULL;
676         int error;
677
678         if (nam->sa_len != sizeof(*addr)) {
679                 error = EINVAL;
680                 goto out;
681         }
682
683         if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) {
684                 error = EADDRNOTAVAIL;
685                 goto out;
686         }
687 #ifdef ENABLE_DEFAULT_SCOPE
688         if (addr->sin6_scope_id == 0) { /* not change if specified  */
689                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
690         }
691 #endif
692         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
693             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
694                 error = EADDRNOTAVAIL;
695                 goto out;
696         }
697         if (ia &&
698             ((struct in6_ifaddr *)ia)->ia6_flags &
699             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
700              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
701                 error = EADDRNOTAVAIL;
702                 goto out;
703         }
704         inp->in6p_laddr = addr->sin6_addr;
705         error = 0;
706 out:
707         lwkt_replymsg(&msg->bind.base.lmsg, error);
708 }
709
710 static void
711 rip6_connect(netmsg_t msg)
712 {
713         struct socket *so = msg->connect.base.nm_so;
714         struct sockaddr *nam = msg->connect.nm_nam;
715         struct inpcb *inp = so->so_pcb;
716         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
717         struct in6_addr *in6a = NULL;
718         int error = 0;
719 #ifdef ENABLE_DEFAULT_SCOPE
720         struct sockaddr_in6 tmp;
721 #endif
722
723         if (nam->sa_len != sizeof(*addr)) {
724                 error = EINVAL;
725                 goto out;
726         }
727         if (TAILQ_EMPTY(&ifnet)) {
728                 error = EADDRNOTAVAIL;
729                 goto out;
730         }
731         if (addr->sin6_family != AF_INET6) {
732                 error = EAFNOSUPPORT;
733                 goto out;
734         }
735 #ifdef ENABLE_DEFAULT_SCOPE
736         if (addr->sin6_scope_id == 0) { /* not change if specified  */
737                 /* avoid overwrites */
738                 tmp = *addr;
739                 addr = &tmp;
740                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
741         }
742 #endif
743         /* Source address selection. XXX: need pcblookup? */
744         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
745                              inp->in6p_moptions, &inp->in6p_route,
746                              &inp->in6p_laddr, &error, NULL);
747         if (in6a == NULL) {
748                 if (error == 0)
749                         error = EADDRNOTAVAIL;
750         } else {
751                 inp->in6p_laddr = *in6a;
752                 inp->in6p_faddr = addr->sin6_addr;
753                 soisconnected(so);
754                 error = 0;
755         }
756 out:
757         lwkt_replymsg(&msg->connect.base.lmsg, error);
758 }
759
760 static void
761 rip6_shutdown(netmsg_t msg)
762 {
763         socantsendmore(msg->shutdown.base.nm_so);
764         lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
765 }
766
767 static void
768 rip6_send(netmsg_t msg)
769 {
770         struct socket *so = msg->send.base.nm_so;
771         struct mbuf *m = msg->send.nm_m;
772         struct sockaddr *nam = msg->send.nm_addr;
773         struct mbuf *control = msg->send.nm_control;
774         struct inpcb *inp = so->so_pcb;
775         struct sockaddr_in6 tmp;
776         struct sockaddr_in6 *dst;
777         int error;
778
779         /* always copy sockaddr to avoid overwrites */
780         if (so->so_state & SS_ISCONNECTED) {
781                 if (nam) {
782                         m_freem(m);
783                         error = EISCONN;
784                         goto out;
785                 }
786                 /* XXX */
787                 bzero(&tmp, sizeof(tmp));
788                 tmp.sin6_family = AF_INET6;
789                 tmp.sin6_len = sizeof(struct sockaddr_in6);
790                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
791                       sizeof(struct in6_addr));
792                 dst = &tmp;
793         } else {
794                 if (nam == NULL) {
795                         m_freem(m);
796                         error = ENOTCONN;
797                         goto out;
798                 }
799                 tmp = *(struct sockaddr_in6 *)nam;
800                 dst = &tmp;
801         }
802 #ifdef ENABLE_DEFAULT_SCOPE
803         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
804                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
805         }
806 #endif
807         error = rip6_output(m, so, dst, control);
808 out:
809         lwkt_replymsg(&msg->send.base.lmsg, error);
810 }
811
812 struct pr_usrreqs rip6_usrreqs = {
813         .pru_abort = rip6_abort,
814         .pru_accept = pr_generic_notsupp,
815         .pru_attach = rip6_attach,
816         .pru_bind = rip6_bind,
817         .pru_connect = rip6_connect,
818         .pru_connect2 = pr_generic_notsupp,
819         .pru_control = in6_control_dispatch,
820         .pru_detach = rip6_detach,
821         .pru_disconnect = rip6_disconnect,
822         .pru_listen = pr_generic_notsupp,
823         .pru_peeraddr = in6_setpeeraddr_dispatch,
824         .pru_rcvd = pr_generic_notsupp,
825         .pru_rcvoob = pr_generic_notsupp,
826         .pru_send = rip6_send,
827         .pru_sense = pru_sense_null,
828         .pru_shutdown = rip6_shutdown,
829         .pru_sockaddr = in6_setsockaddr_dispatch,
830         .pru_sosend = sosend,
831         .pru_soreceive = soreceive
832 };