inet6: Cosmetic clean up
[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_ipsec.h"
64 #include "opt_inet6.h"
65
66 #include <sys/param.h>
67 #include <sys/malloc.h>
68 #include <sys/proc.h>
69 #include <sys/priv.h>
70 #include <sys/mbuf.h>
71 #include <sys/socket.h>
72 #include <sys/jail.h>
73 #include <sys/protosw.h>
74 #include <sys/socketvar.h>
75 #include <sys/errno.h>
76 #include <sys/systm.h>
77
78 #include <sys/thread2.h>
79 #include <sys/socketvar2.h>
80 #include <sys/msgport2.h>
81
82 #include <net/if.h>
83 #include <net/route.h>
84 #include <net/if_types.h>
85
86 #include <netinet/in.h>
87 #include <netinet/in_var.h>
88 #include <netinet/in_systm.h>
89 #include <netinet/ip6.h>
90 #include <netinet6/ip6_var.h>
91 #include <netinet6/ip6_mroute.h>
92 #include <netinet/icmp6.h>
93 #include <netinet/in_pcb.h>
94 #include <netinet6/in6_pcb.h>
95 #include <netinet6/nd6.h>
96 #include <netinet6/ip6protosw.h>
97 #ifdef ENABLE_DEFAULT_SCOPE
98 #include <netinet6/scope6_var.h>
99 #endif
100 #include <netinet6/raw_ip6.h>
101
102 #ifdef IPSEC
103 #include <netinet6/ipsec.h>
104 #include <netinet6/ipsec6.h>
105 #endif /*IPSEC*/
106
107 #ifdef FAST_IPSEC
108 #include <netproto/ipsec/ipsec.h>
109 #include <netproto/ipsec/ipsec6.h>
110 #endif /* FAST_IPSEC */
111
112 #include <machine/stdarg.h>
113
114 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
115 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
116
117 /*
118  * Raw interface to IP6 protocol.
119  */
120
121 extern struct   inpcbinfo ripcbinfo;
122 extern u_long   rip_sendspace;
123 extern u_long   rip_recvspace;
124
125 struct rip6stat rip6stat;
126
127 /*
128  * Setup generic address and protocol structures
129  * for raw_input routine, then pass them along with
130  * mbuf chain.
131  */
132 int
133 rip6_input(struct mbuf **mp, int *offp, int proto)
134 {
135         struct mbuf *m = *mp;
136         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
137         struct inpcb *in6p;
138         struct inpcb *last = NULL;
139         struct mbuf *opts = NULL;
140         struct sockaddr_in6 rip6src;
141
142         rip6stat.rip6s_ipackets++;
143
144         if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
145                 /* XXX send icmp6 host/port unreach? */
146                 m_freem(m);
147                 return IPPROTO_DONE;
148         }
149
150         init_sin6(&rip6src, m); /* general init */
151
152         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
153                 if (in6p->in6p_flags & INP_PLACEMARKER)
154                         continue;
155                 if (!INP_ISIPV6(in6p))
156                         continue;
157                 if (in6p->in6p_ip6_nxt &&
158                     in6p->in6p_ip6_nxt != proto)
159                         continue;
160                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
161                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
162                         continue;
163                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
164                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
165                         continue;
166                 if (in6p->in6p_cksum != -1) {
167                         rip6stat.rip6s_isum++;
168                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
169                             m->m_pkthdr.len - *offp)) {
170                                 rip6stat.rip6s_badsum++;
171                                 continue;
172                         }
173                 }
174                 if (last) {
175                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
176
177 #ifdef IPSEC
178                         /*
179                          * Check AH/ESP integrity.
180                          */
181                         if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
182                                 m_freem(n);
183                                 ipsec6stat.in_polvio++;
184                                 /* do not inject data into pcb */
185                         } else
186 #endif /*IPSEC*/
187 #ifdef FAST_IPSEC
188                         /*
189                          * Check AH/ESP integrity.
190                          */
191                         if (n && ipsec6_in_reject(n, last)) {
192                                 m_freem(n);
193                                 /* do not inject data into pcb */
194                         } else
195 #endif /*FAST_IPSEC*/
196                         if (n) {
197                                 struct socket *so;
198
199                                 so = last->in6p_socket;
200                                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
201                                     (so->so_options & SO_TIMESTAMP)) {
202                                         ip6_savecontrol(last, &opts, ip6, n);
203                                 }
204                                 /* strip intermediate headers */
205                                 m_adj(n, *offp);
206                                 lwkt_gettoken(&so->so_rcv.ssb_token);
207                                 if (ssb_appendaddr(&so->so_rcv,
208                                                 (struct sockaddr *)&rip6src,
209                                                  n, opts) == 0) {
210                                         m_freem(n);
211                                         if (opts)
212                                                 m_freem(opts);
213                                         rip6stat.rip6s_fullsock++;
214                                 } else {
215                                         sorwakeup(so);
216                                 }
217                                 lwkt_reltoken(&so->so_rcv.ssb_token);
218                                 opts = NULL;
219                         }
220                 }
221                 last = in6p;
222         }
223 #ifdef IPSEC
224         /*
225          * Check AH/ESP integrity.
226          */
227         if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
228                 m_freem(m);
229                 ipsec6stat.in_polvio++;
230                 ip6stat.ip6s_delivered--;
231                 /* do not inject data into pcb */
232         } else
233 #endif /*IPSEC*/
234 #ifdef FAST_IPSEC
235         /*
236          * Check AH/ESP integrity.
237          */
238         if (last && ipsec6_in_reject(m, last)) {
239                 m_freem(m);
240                 ip6stat.ip6s_delivered--;
241                 /* do not inject data into pcb */
242         } else
243 #endif /*FAST_IPSEC*/
244         if (last) {
245                 struct socket *so;
246
247                 so = last->in6p_socket;
248                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
249                     (so->so_options & SO_TIMESTAMP)) {
250                         ip6_savecontrol(last, &opts, ip6, m);
251                 }
252                 /* strip intermediate headers */
253                 m_adj(m, *offp);
254                 lwkt_gettoken(&so->so_rcv.ssb_token);
255                 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src,
256                                    m, opts) == 0) {
257                         m_freem(m);
258                         if (opts)
259                                 m_freem(opts);
260                         rip6stat.rip6s_fullsock++;
261                 } else {
262                         sorwakeup(so);
263                 }
264                 lwkt_reltoken(&so->so_rcv.ssb_token);
265         } else {
266                 rip6stat.rip6s_nosock++;
267                 if (m->m_flags & M_MCAST)
268                         rip6stat.rip6s_nosockmcast++;
269                 if (proto == IPPROTO_NONE)
270                         m_freem(m);
271                 else {
272                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
273                         icmp6_error(m, ICMP6_PARAM_PROB,
274                                     ICMP6_PARAMPROB_NEXTHEADER,
275                                     prvnxtp - mtod(m, char *));
276                 }
277                 ip6stat.ip6s_delivered--;
278         }
279         return IPPROTO_DONE;
280 }
281
282 void
283 rip6_ctlinput(netmsg_t msg)
284 {
285         int cmd = msg->ctlinput.nm_cmd;
286         struct sockaddr *sa = msg->ctlinput.nm_arg;
287         void *d = msg->ctlinput.nm_extra;
288         struct ip6ctlparam *ip6cp = NULL;
289         const struct sockaddr_in6 *sa6_src = NULL;
290         inp_notify_t notify = in6_rtchange;
291
292         if (sa->sa_family != AF_INET6 ||
293             sa->sa_len != sizeof(struct sockaddr_in6))
294                 goto out;
295
296         if ((unsigned)cmd >= PRC_NCMDS)
297                 goto out;
298         if (PRC_IS_REDIRECT(cmd))
299                 notify = in6_rtchange, d = NULL;
300         else if (cmd == PRC_HOSTDEAD)
301                 d = NULL;
302         else if (inet6ctlerrmap[cmd] == 0)
303                 goto out;
304
305         /* if the parameter is from icmp6, decode it. */
306         if (d != NULL) {
307                 ip6cp = (struct ip6ctlparam *)d;
308                 sa6_src = ip6cp->ip6c_src;
309         } else {
310                 sa6_src = &sa6_any;
311         }
312
313         in6_pcbnotify(&ripcbinfo, sa, 0,
314                       (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
315 out:
316         lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
317 }
318
319 /*
320  * Generate IPv6 header and pass packet to ip6_output.
321  * Tack on options user may have setup with control call.
322  */
323 int
324 rip6_output(struct mbuf *m, struct socket *so, ...)
325 {
326         struct sockaddr_in6 *dstsock;
327         struct mbuf *control;
328         struct in6_addr *dst;
329         struct ip6_hdr *ip6;
330         struct inpcb *in6p;
331         u_int   plen = m->m_pkthdr.len;
332         int error = 0;
333         struct ip6_pktopts opt, *optp = NULL;
334         struct ifnet *oifp = NULL;
335         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
336         int priv = 0;
337         __va_list ap;
338
339         __va_start(ap, so);
340         dstsock = __va_arg(ap, struct sockaddr_in6 *);
341         control = __va_arg(ap, struct mbuf *);
342         __va_end(ap);
343
344         if (IN6_IS_ADDR_V4MAPPED(&dstsock->sin6_addr)) {
345                 error = EADDRNOTAVAIL;
346                 goto bad;
347         }
348
349         in6p = so->so_pcb;
350
351         priv = 0;
352         if (so->so_cred->cr_uid == 0)
353                 priv = 1;
354         dst = &dstsock->sin6_addr;
355         if (control) {
356                 if ((error = ip6_setpktoptions(control, &opt,
357                     in6p->in6p_outputopts, 
358                     so->so_proto->pr_protocol, priv)) != 0)
359                         goto bad;
360                 optp = &opt;
361         } else
362                 optp = in6p->in6p_outputopts;
363
364         /*
365          * For an ICMPv6 packet, we should know its type and code
366          * to update statistics.
367          */
368         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
369                 struct icmp6_hdr *icmp6;
370                 if (m->m_len < sizeof(struct icmp6_hdr) &&
371                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
372                         error = ENOBUFS;
373                         goto bad;
374                 }
375                 icmp6 = mtod(m, struct icmp6_hdr *);
376                 type = icmp6->icmp6_type;
377                 code = icmp6->icmp6_code;
378         }
379
380         M_PREPEND(m, sizeof(*ip6), M_WAITOK);
381         ip6 = mtod(m, struct ip6_hdr *);
382
383         /*
384          * Next header might not be ICMP6 but use its pseudo header anyway.
385          */
386         ip6->ip6_dst = *dst;
387
388         /*
389          * If the scope of the destination is link-local, embed the interface
390          * index in the address.
391          *
392          * XXX advanced-api value overrides sin6_scope_id
393          */
394         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
395                 struct in6_pktinfo *pi;
396
397                 /*
398                  * XXX Boundary check is assumed to be already done in
399                  * ip6_setpktoptions().
400                  */
401                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
402                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
403                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
404                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
405                          in6p->in6p_moptions &&
406                          in6p->in6p_moptions->im6o_multicast_ifp) {
407                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
408                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
409                 } else if (dstsock->sin6_scope_id) {
410                         /* boundary check */
411                         if (dstsock->sin6_scope_id < 0 ||
412                             if_index < dstsock->sin6_scope_id) {
413                                 error = ENXIO;  /* XXX EINVAL? */
414                                 goto bad;
415                         }
416                         ip6->ip6_dst.s6_addr16[1] =
417                             htons(dstsock->sin6_scope_id & 0xffff); /* XXX */
418                 }
419         }
420
421         /*
422          * Source address selection.
423          */
424         {
425                 struct in6_addr *in6a;
426
427                 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions,
428                     &in6p->in6p_route, &in6p->in6p_laddr, &error, NULL))
429                     == NULL) {
430                         if (error == 0)
431                                 error = EADDRNOTAVAIL;
432                         goto bad;
433                 }
434                 ip6->ip6_src = *in6a;
435                 if (in6p->in6p_route.ro_rt)
436                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
437         }
438         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
439                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
440         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
441                 (IPV6_VERSION & IPV6_VERSION_MASK);
442         /* ip6_plen will be filled in ip6_output, so not fill it here. */
443         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
444         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
445
446         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
447             in6p->in6p_cksum != -1) {
448                 struct mbuf *n;
449                 int off;
450                 u_int16_t *p;
451
452                 /* compute checksum */
453                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
454                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
455                 else
456                         off = in6p->in6p_cksum;
457                 if (plen < off + 1) {
458                         error = EINVAL;
459                         goto bad;
460                 }
461                 off += sizeof(struct ip6_hdr);
462
463                 n = m;
464                 while (n && n->m_len <= off) {
465                         off -= n->m_len;
466                         n = n->m_next;
467                 }
468                 if (!n)
469                         goto bad;
470                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
471                 *p = 0;
472                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
473         }
474
475         error = ip6_output(m, optp, &in6p->in6p_route, 0,
476                            in6p->in6p_moptions, &oifp, in6p);
477         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
478                 if (oifp)
479                         icmp6_ifoutstat_inc(oifp, type, code);
480                 icmp6stat.icp6s_outhist[type]++;
481         } else
482                 rip6stat.rip6s_opackets++;
483
484         goto freectl;
485
486 bad:
487         if (m)
488                 m_freem(m);
489
490 freectl:
491         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
492                 RTFREE(optp->ip6po_route.ro_rt);
493         if (control) {
494                 if (optp == &opt)
495                         ip6_clearpktopts(optp, -1);
496                 m_freem(control);
497         }
498         return (error);
499 }
500
501 /*
502  * Raw IPv6 socket option processing.
503  */
504 void
505 rip6_ctloutput(netmsg_t msg)
506 {
507         struct socket *so = msg->ctloutput.base.nm_so;
508         struct sockopt *sopt = msg->ctloutput.nm_sopt;
509         int error;
510
511         if (sopt->sopt_level == IPPROTO_ICMPV6) {
512                 /*
513                  * XXX: is it better to call icmp6_ctloutput() directly
514                  * from protosw?
515                  */
516                 icmp6_ctloutput(msg);
517                 /* msg invalid now */
518                 return;
519         }
520         if (sopt->sopt_level != IPPROTO_IPV6) {
521                 error = EINVAL;
522                 goto out;
523         }
524
525         error = 0;
526
527         switch (sopt->sopt_dir) {
528         case SOPT_GET:
529                 switch (sopt->sopt_name) {
530                 case MRT6_INIT:
531                 case MRT6_DONE:
532                 case MRT6_ADD_MIF:
533                 case MRT6_DEL_MIF:
534                 case MRT6_ADD_MFC:
535                 case MRT6_DEL_MFC:
536                 case MRT6_PIM:
537                         error = ip6_mrouter_get(so, sopt);
538                         break;
539                 case IPV6_CHECKSUM:
540                         error = ip6_raw_ctloutput(so, sopt);
541                         break;
542                 default:
543                         error = ip6_ctloutput(so, sopt);
544                         break;
545                 }
546                 break;
547
548         case SOPT_SET:
549                 switch (sopt->sopt_name) {
550                 case MRT6_INIT:
551                 case MRT6_DONE:
552                 case MRT6_ADD_MIF:
553                 case MRT6_DEL_MIF:
554                 case MRT6_ADD_MFC:
555                 case MRT6_DEL_MFC:
556                 case MRT6_PIM:
557                         error = ip6_mrouter_set(so, sopt);
558                         break;
559                 case IPV6_CHECKSUM:
560                         error = ip6_raw_ctloutput(so, sopt);
561                         break;
562                 default:
563                         error = ip6_ctloutput(so, sopt);
564                         break;
565                 }
566                 break;
567         }
568 out:
569         lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
570 }
571
572 static void
573 rip6_attach(netmsg_t msg)
574 {
575         struct socket *so = msg->attach.base.nm_so;
576         int proto = msg->attach.nm_proto;
577         struct pru_attach_info *ai = msg->attach.nm_ai;
578         struct inpcb *inp;
579         int error;
580
581         inp = so->so_pcb;
582         if (inp)
583                 panic("rip6_attach");
584         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
585         if (error)
586                 goto out;
587
588         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
589         if (error)
590                 goto out;
591         crit_enter();
592         error = in_pcballoc(so, &ripcbinfo);
593         crit_exit();
594         if (error)
595                 goto out;
596         inp = (struct inpcb *)so->so_pcb;
597         inp->in6p_ip6_nxt = (long)proto;
598         inp->in6p_hops = -1;    /* use kernel default */
599         inp->in6p_cksum = -1;
600         inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB,
601                                       M_NOWAIT);
602         if (inp->in6p_icmp6filt != NULL)
603                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
604         error = 0;
605 out:
606         lwkt_replymsg(&msg->attach.base.lmsg, error);
607 }
608
609 static void
610 rip6_detach(netmsg_t msg)
611 {
612         struct socket *so = msg->detach.base.nm_so;
613         struct inpcb *inp;
614
615         inp = so->so_pcb;
616         if (inp == NULL)
617                 panic("rip6_detach");
618         /* xxx: RSVP */
619         if (so == ip6_mrouter)
620                 ip6_mrouter_done();
621         if (inp->in6p_icmp6filt) {
622                 kfree(inp->in6p_icmp6filt, M_PCB);
623                 inp->in6p_icmp6filt = NULL;
624         }
625         in6_pcbdetach(inp);
626         lwkt_replymsg(&msg->detach.base.lmsg, 0);
627 }
628
629 /*
630  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
631  *       will sofree() it when we return.
632  */
633 static void
634 rip6_abort(netmsg_t msg)
635 {
636         soisdisconnected(msg->abort.base.nm_so);
637         rip6_detach(msg);
638         /* msg invalid now */
639 }
640
641 static void
642 rip6_disconnect(netmsg_t msg)
643 {
644         struct socket *so = msg->disconnect.base.nm_so;
645         struct inpcb *inp = so->so_pcb;
646
647         if (so->so_state & SS_ISCONNECTED) {
648                 inp->in6p_faddr = kin6addr_any;
649                 soreference(so);
650                 rip6_abort(msg);
651                 /* msg invalid now */
652                 sofree(so);
653                 return;
654         }
655         lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN);
656 }
657
658 static void
659 rip6_bind(netmsg_t msg)
660 {
661         struct socket *so = msg->bind.base.nm_so;
662         struct sockaddr *nam = msg->bind.nm_nam;
663         struct inpcb *inp = so->so_pcb;
664         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
665         struct ifaddr *ia = NULL;
666         int error;
667
668         if (nam->sa_len != sizeof(*addr)) {
669                 error = EINVAL;
670                 goto out;
671         }
672         if (ifnet_array_isempty() || addr->sin6_family != AF_INET6) {
673                 error = EADDRNOTAVAIL;
674                 goto out;
675         }
676         if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
677                 error = EADDRNOTAVAIL;
678                 goto out;
679         }
680 #ifdef ENABLE_DEFAULT_SCOPE
681         if (addr->sin6_scope_id == 0) { /* not change if specified  */
682                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
683         }
684 #endif
685         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
686             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
687                 error = EADDRNOTAVAIL;
688                 goto out;
689         }
690         if (ia &&
691             ((struct in6_ifaddr *)ia)->ia6_flags &
692             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
693              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
694                 error = EADDRNOTAVAIL;
695                 goto out;
696         }
697         inp->in6p_laddr = addr->sin6_addr;
698         error = 0;
699 out:
700         lwkt_replymsg(&msg->bind.base.lmsg, error);
701 }
702
703 static void
704 rip6_connect(netmsg_t msg)
705 {
706         struct socket *so = msg->connect.base.nm_so;
707         struct sockaddr *nam = msg->connect.nm_nam;
708         struct inpcb *inp = so->so_pcb;
709         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
710         struct in6_addr *in6a = NULL;
711         int error = 0;
712 #ifdef ENABLE_DEFAULT_SCOPE
713         struct sockaddr_in6 tmp;
714 #endif
715
716         if (nam->sa_len != sizeof(*addr)) {
717                 error = EINVAL;
718                 goto out;
719         }
720         if (ifnet_array_isempty()) {
721                 error = EADDRNOTAVAIL;
722                 goto out;
723         }
724         if (addr->sin6_family != AF_INET6) {
725                 error = EAFNOSUPPORT;
726                 goto out;
727         }
728         if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
729                 error = EADDRNOTAVAIL;
730                 goto out;
731         }
732 #ifdef ENABLE_DEFAULT_SCOPE
733         if (addr->sin6_scope_id == 0) { /* not change if specified  */
734                 /* avoid overwrites */
735                 tmp = *addr;
736                 addr = &tmp;
737                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
738         }
739 #endif
740         /* Source address selection. XXX: need pcblookup? */
741         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
742                              inp->in6p_moptions, &inp->in6p_route,
743                              &inp->in6p_laddr, &error, NULL);
744         if (in6a == NULL) {
745                 if (error == 0)
746                         error = EADDRNOTAVAIL;
747         } else {
748                 inp->in6p_laddr = *in6a;
749                 inp->in6p_faddr = addr->sin6_addr;
750                 soisconnected(so);
751                 error = 0;
752         }
753 out:
754         lwkt_replymsg(&msg->connect.base.lmsg, error);
755 }
756
757 static void
758 rip6_shutdown(netmsg_t msg)
759 {
760         socantsendmore(msg->shutdown.base.nm_so);
761         lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
762 }
763
764 static void
765 rip6_send(netmsg_t msg)
766 {
767         struct socket *so = msg->send.base.nm_so;
768         struct mbuf *m = msg->send.nm_m;
769         struct sockaddr *nam = msg->send.nm_addr;
770         struct mbuf *control = msg->send.nm_control;
771         struct inpcb *inp = so->so_pcb;
772         struct sockaddr_in6 tmp;
773         struct sockaddr_in6 *dst;
774         int error;
775
776         /* always copy sockaddr to avoid overwrites */
777         if (so->so_state & SS_ISCONNECTED) {
778                 if (nam) {
779                         m_freem(m);
780                         error = EISCONN;
781                         goto out;
782                 }
783                 /* XXX */
784                 bzero(&tmp, sizeof(tmp));
785                 tmp.sin6_family = AF_INET6;
786                 tmp.sin6_len = sizeof(struct sockaddr_in6);
787                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
788                       sizeof(struct in6_addr));
789                 dst = &tmp;
790         } else {
791                 if (nam == NULL) {
792                         m_freem(m);
793                         error = ENOTCONN;
794                         goto out;
795                 }
796                 tmp = *(struct sockaddr_in6 *)nam;
797                 dst = &tmp;
798         }
799 #ifdef ENABLE_DEFAULT_SCOPE
800         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
801                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
802         }
803 #endif
804         error = rip6_output(m, so, dst, control);
805 out:
806         lwkt_replymsg(&msg->send.base.lmsg, error);
807 }
808
809 struct pr_usrreqs rip6_usrreqs = {
810         .pru_abort = rip6_abort,
811         .pru_accept = pr_generic_notsupp,
812         .pru_attach = rip6_attach,
813         .pru_bind = rip6_bind,
814         .pru_connect = rip6_connect,
815         .pru_connect2 = pr_generic_notsupp,
816         .pru_control = in6_control_dispatch,
817         .pru_detach = rip6_detach,
818         .pru_disconnect = rip6_disconnect,
819         .pru_listen = pr_generic_notsupp,
820         .pru_peeraddr = in6_setpeeraddr_dispatch,
821         .pru_rcvd = pr_generic_notsupp,
822         .pru_rcvoob = pr_generic_notsupp,
823         .pru_send = rip6_send,
824         .pru_sense = pru_sense_null,
825         .pru_shutdown = rip6_shutdown,
826         .pru_sockaddr = in6_setsockaddr_dispatch,
827         .pru_sosend = sosend,
828         .pru_soreceive = soreceive
829 };