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[dragonfly.git] / sys / netinet6 / udp6_usrreq.c
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1/* $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.13 2003/01/24 05:11:35 sam Exp $ */
2/* $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ */
3
4/*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33/*
34 * Copyright (c) 1982, 1986, 1989, 1993
35 * The Regents of the University of California. All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. All advertising materials mentioning features or use of this software
46 * must display the following acknowledgement:
47 * This product includes software developed by the University of
48 * California, Berkeley and its contributors.
49 * 4. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * SUCH DAMAGE.
64 *
65 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
66 */
67
68#include "opt_inet.h"
69#include "opt_inet6.h"
70#include "opt_ipsec.h"
71
72#include <sys/param.h>
73#include <sys/kernel.h>
74#include <sys/mbuf.h>
75#include <sys/protosw.h>
76#include <sys/socket.h>
77#include <sys/socketvar.h>
78#include <sys/sysctl.h>
79#include <sys/errno.h>
80#include <sys/stat.h>
81#include <sys/systm.h>
82#include <sys/syslog.h>
83#include <sys/proc.h>
84
85#include <net/if.h>
86#include <net/route.h>
87#include <net/if_types.h>
88
89#include <netinet/in.h>
90#include <netinet/in_systm.h>
91#include <netinet/ip.h>
92#include <netinet/in_pcb.h>
93#include <netinet/in_var.h>
94#include <netinet/ip_var.h>
95#include <netinet/udp.h>
96#include <netinet/udp_var.h>
97#include <netinet/ip6.h>
98#include <netinet6/ip6_var.h>
99#include <netinet6/in6_pcb.h>
100#include <netinet/icmp6.h>
101#include <netinet6/udp6_var.h>
102#include <netinet6/ip6protosw.h>
103
104#ifdef IPSEC
105#include <netinet6/ipsec.h>
106#include <netinet6/ipsec6.h>
107#endif /* IPSEC */
108
109#ifdef FAST_IPSEC
110#include <netipsec/ipsec.h>
111#include <netipsec/ipsec6.h>
112#endif /* FAST_IPSEC */
113
114/*
115 * UDP protocol inplementation.
116 * Per RFC 768, August, 1980.
117 */
118
119extern struct protosw inetsw[];
120static int in6_mcmatch __P((struct inpcb *, struct in6_addr *, struct ifnet *));
121static int udp6_detach __P((struct socket *so));
122
123static int
124in6_mcmatch(in6p, ia6, ifp)
125 struct inpcb *in6p;
126 register struct in6_addr *ia6;
127 struct ifnet *ifp;
128{
129 struct ip6_moptions *im6o = in6p->in6p_moptions;
130 struct in6_multi_mship *imm;
131
132 if (im6o == NULL)
133 return 0;
134
135 for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
136 imm = imm->i6mm_chain.le_next) {
137 if ((ifp == NULL ||
138 imm->i6mm_maddr->in6m_ifp == ifp) &&
139 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
140 ia6))
141 return 1;
142 }
143 return 0;
144}
145
146int
147udp6_input(mp, offp, proto)
148 struct mbuf **mp;
149 int *offp, proto;
150{
151 struct mbuf *m = *mp;
152 register struct ip6_hdr *ip6;
153 register struct udphdr *uh;
154 register struct inpcb *in6p;
155 struct mbuf *opts = NULL;
156 int off = *offp;
157 int plen, ulen;
158 struct sockaddr_in6 udp_in6;
159
160 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
161
162 ip6 = mtod(m, struct ip6_hdr *);
163
164 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
165 /* XXX send icmp6 host/port unreach? */
166 m_freem(m);
167 return IPPROTO_DONE;
168 }
169
170 udpstat.udps_ipackets++;
171
172 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
173 uh = (struct udphdr *)((caddr_t)ip6 + off);
174 ulen = ntohs((u_short)uh->uh_ulen);
175
176 if (plen != ulen) {
177 udpstat.udps_badlen++;
178 goto bad;
179 }
180
181 /*
182 * Checksum extended UDP header and data.
183 */
184 if (uh->uh_sum == 0)
185 udpstat.udps_nosum++;
186 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
187 udpstat.udps_badsum++;
188 goto bad;
189 }
190
191 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
192 struct inpcb *last;
193
194 /*
195 * Deliver a multicast datagram to all sockets
196 * for which the local and remote addresses and ports match
197 * those of the incoming datagram. This allows more than
198 * one process to receive multicasts on the same port.
199 * (This really ought to be done for unicast datagrams as
200 * well, but that would cause problems with existing
201 * applications that open both address-specific sockets and
202 * a wildcard socket listening to the same port -- they would
203 * end up receiving duplicates of every unicast datagram.
204 * Those applications open the multiple sockets to overcome an
205 * inadequacy of the UDP socket interface, but for backwards
206 * compatibility we avoid the problem here rather than
207 * fixing the interface. Maybe 4.5BSD will remedy this?)
208 */
209
210 /*
211 * In a case that laddr should be set to the link-local
212 * address (this happens in RIPng), the multicast address
213 * specified in the received packet does not match with
214 * laddr. To cure this situation, the matching is relaxed
215 * if the receiving interface is the same as one specified
216 * in the socket and if the destination multicast address
217 * matches one of the multicast groups specified in the socket.
218 */
219
220 /*
221 * Construct sockaddr format source address.
222 */
223 init_sin6(&udp_in6, m); /* general init */
224 udp_in6.sin6_port = uh->uh_sport;
225 /*
226 * KAME note: traditionally we dropped udpiphdr from mbuf here.
227 * We need udphdr for IPsec processing so we do that later.
228 */
229
230 /*
231 * Locate pcb(s) for datagram.
232 * (Algorithm copied from raw_intr().)
233 */
234 last = NULL;
235 LIST_FOREACH(in6p, &udb, inp_list) {
236 if ((in6p->inp_vflag & INP_IPV6) == 0)
237 continue;
238 if (in6p->in6p_lport != uh->uh_dport)
239 continue;
240 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
241 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
242 &ip6->ip6_dst) &&
243 !in6_mcmatch(in6p, &ip6->ip6_dst,
244 m->m_pkthdr.rcvif))
245 continue;
246 }
247 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
248 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
249 &ip6->ip6_src) ||
250 in6p->in6p_fport != uh->uh_sport)
251 continue;
252 }
253
254 if (last != NULL) {
255 struct mbuf *n;
256
257#ifdef IPSEC
258 /*
259 * Check AH/ESP integrity.
260 */
261 if (ipsec6_in_reject_so(m, last->inp_socket))
262 ipsec6stat.in_polvio++;
263 /* do not inject data into pcb */
264 else
265#endif /* IPSEC */
266#ifdef FAST_IPSEC
267 /*
268 * Check AH/ESP integrity.
269 */
270 if (ipsec6_in_reject(m, last))
271 ;
272 else
273#endif /* FAST_IPSEC */
274 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
275 /*
276 * KAME NOTE: do not
277 * m_copy(m, offset, ...) above.
278 * sbappendaddr() expects M_PKTHDR,
279 * and m_copy() will copy M_PKTHDR
280 * only if offset is 0.
281 */
282 if (last->in6p_flags & IN6P_CONTROLOPTS
283 || last->in6p_socket->so_options & SO_TIMESTAMP)
284 ip6_savecontrol(last, &opts,
285 ip6, n);
286
287 m_adj(n, off + sizeof(struct udphdr));
288 if (sbappendaddr(&last->in6p_socket->so_rcv,
289 (struct sockaddr *)&udp_in6,
290 n, opts) == 0) {
291 m_freem(n);
292 if (opts)
293 m_freem(opts);
294 udpstat.udps_fullsock++;
295 } else
296 sorwakeup(last->in6p_socket);
297 opts = NULL;
298 }
299 }
300 last = in6p;
301 /*
302 * Don't look for additional matches if this one does
303 * not have either the SO_REUSEPORT or SO_REUSEADDR
304 * socket options set. This heuristic avoids searching
305 * through all pcbs in the common case of a non-shared
306 * port. It assumes that an application will never
307 * clear these options after setting them.
308 */
309 if ((last->in6p_socket->so_options &
310 (SO_REUSEPORT|SO_REUSEADDR)) == 0)
311 break;
312 }
313
314 if (last == NULL) {
315 /*
316 * No matching pcb found; discard datagram.
317 * (No need to send an ICMP Port Unreachable
318 * for a broadcast or multicast datgram.)
319 */
320 udpstat.udps_noport++;
321 udpstat.udps_noportmcast++;
322 goto bad;
323 }
324#ifdef IPSEC
325 /*
326 * Check AH/ESP integrity.
327 */
328 if (ipsec6_in_reject_so(m, last->inp_socket)) {
329 ipsec6stat.in_polvio++;
330 goto bad;
331 }
332#endif /* IPSEC */
333#ifdef FAST_IPSEC
334 /*
335 * Check AH/ESP integrity.
336 */
337 if (ipsec6_in_reject(m, last)) {
338 goto bad;
339 }
340#endif /* FAST_IPSEC */
341 if (last->in6p_flags & IN6P_CONTROLOPTS
342 || last->in6p_socket->so_options & SO_TIMESTAMP)
343 ip6_savecontrol(last, &opts, ip6, m);
344
345 m_adj(m, off + sizeof(struct udphdr));
346 if (sbappendaddr(&last->in6p_socket->so_rcv,
347 (struct sockaddr *)&udp_in6,
348 m, opts) == 0) {
349 udpstat.udps_fullsock++;
350 goto bad;
351 }
352 sorwakeup(last->in6p_socket);
353 return IPPROTO_DONE;
354 }
355 /*
356 * Locate pcb for datagram.
357 */
358 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport,
359 &ip6->ip6_dst, uh->uh_dport, 1,
360 m->m_pkthdr.rcvif);
361 if (in6p == 0) {
362 if (log_in_vain) {
363 char buf[INET6_ADDRSTRLEN];
364
365 strcpy(buf, ip6_sprintf(&ip6->ip6_dst));
366 log(LOG_INFO,
367 "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
368 buf, ntohs(uh->uh_dport),
369 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport));
370 }
371 udpstat.udps_noport++;
372 if (m->m_flags & M_MCAST) {
373 printf("UDP6: M_MCAST is set in a unicast packet.\n");
374 udpstat.udps_noportmcast++;
375 goto bad;
376 }
377 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
378 return IPPROTO_DONE;
379 }
380#ifdef IPSEC
381 /*
382 * Check AH/ESP integrity.
383 */
384 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) {
385 ipsec6stat.in_polvio++;
386 goto bad;
387 }
388#endif /* IPSEC */
389#ifdef FAST_IPSEC
390 /*
391 * Check AH/ESP integrity.
392 */
393 if (ipsec6_in_reject(m, in6p)) {
394 goto bad;
395 }
396#endif /* FAST_IPSEC */
397
398 /*
399 * Construct sockaddr format source address.
400 * Stuff source address and datagram in user buffer.
401 */
402 init_sin6(&udp_in6, m); /* general init */
403 udp_in6.sin6_port = uh->uh_sport;
404 if (in6p->in6p_flags & IN6P_CONTROLOPTS
405 || in6p->in6p_socket->so_options & SO_TIMESTAMP)
406 ip6_savecontrol(in6p, &opts, ip6, m);
407 m_adj(m, off + sizeof(struct udphdr));
408 if (sbappendaddr(&in6p->in6p_socket->so_rcv,
409 (struct sockaddr *)&udp_in6,
410 m, opts) == 0) {
411 udpstat.udps_fullsock++;
412 goto bad;
413 }
414 sorwakeup(in6p->in6p_socket);
415 return IPPROTO_DONE;
416bad:
417 if (m)
418 m_freem(m);
419 if (opts)
420 m_freem(opts);
421 return IPPROTO_DONE;
422}
423
424void
425udp6_ctlinput(cmd, sa, d)
426 int cmd;
427 struct sockaddr *sa;
428 void *d;
429{
430 struct udphdr uh;
431 struct ip6_hdr *ip6;
432 struct mbuf *m;
433 int off = 0;
434 struct ip6ctlparam *ip6cp = NULL;
435 const struct sockaddr_in6 *sa6_src = NULL;
436 void (*notify) __P((struct inpcb *, int)) = udp_notify;
437 struct udp_portonly {
438 u_int16_t uh_sport;
439 u_int16_t uh_dport;
440 } *uhp;
441
442 if (sa->sa_family != AF_INET6 ||
443 sa->sa_len != sizeof(struct sockaddr_in6))
444 return;
445
446 if ((unsigned)cmd >= PRC_NCMDS)
447 return;
448 if (PRC_IS_REDIRECT(cmd))
449 notify = in6_rtchange, d = NULL;
450 else if (cmd == PRC_HOSTDEAD)
451 d = NULL;
452 else if (inet6ctlerrmap[cmd] == 0)
453 return;
454
455 /* if the parameter is from icmp6, decode it. */
456 if (d != NULL) {
457 ip6cp = (struct ip6ctlparam *)d;
458 m = ip6cp->ip6c_m;
459 ip6 = ip6cp->ip6c_ip6;
460 off = ip6cp->ip6c_off;
461 sa6_src = ip6cp->ip6c_src;
462 } else {
463 m = NULL;
464 ip6 = NULL;
465 sa6_src = &sa6_any;
466 }
467
468 if (ip6) {
469 /*
470 * XXX: We assume that when IPV6 is non NULL,
471 * M and OFF are valid.
472 */
473
474 /* check if we can safely examine src and dst ports */
475 if (m->m_pkthdr.len < off + sizeof(*uhp))
476 return;
477
478 bzero(&uh, sizeof(uh));
479 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
480
481 (void) in6_pcbnotify(&udb, sa, uh.uh_dport,
482 (struct sockaddr *)ip6cp->ip6c_src,
483 uh.uh_sport, cmd, notify);
484 } else
485 (void) in6_pcbnotify(&udb, sa, 0, (struct sockaddr *)sa6_src,
486 0, cmd, notify);
487}
488
489static int
490udp6_getcred(SYSCTL_HANDLER_ARGS)
491{
492 struct sockaddr_in6 addrs[2];
493 struct inpcb *inp;
494 int error, s;
495
496 error = suser(req->p);
497 if (error)
498 return (error);
499
500 if (req->newlen != sizeof(addrs))
501 return (EINVAL);
502 if (req->oldlen != sizeof(struct ucred))
503 return (EINVAL);
504 error = SYSCTL_IN(req, addrs, sizeof(addrs));
505 if (error)
506 return (error);
507 s = splnet();
508 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr,
509 addrs[1].sin6_port,
510 &addrs[0].sin6_addr, addrs[0].sin6_port,
511 1, NULL);
512 if (!inp || !inp->inp_socket) {
513 error = ENOENT;
514 goto out;
515 }
516 error = SYSCTL_OUT(req, inp->inp_socket->so_cred,
517 sizeof(struct ucred));
518
519out:
520 splx(s);
521 return (error);
522}
523
524SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
525 0, 0,
526 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection");
527
528static int
529udp6_abort(struct socket *so)
530{
531 struct inpcb *inp;
532 int s;
533
534 inp = sotoinpcb(so);
535 if (inp == 0)
536 return EINVAL; /* ??? possible? panic instead? */
537 soisdisconnected(so);
538 s = splnet();
539 in6_pcbdetach(inp);
540 splx(s);
541 return 0;
542}
543
544static int
545udp6_attach(struct socket *so, int proto, struct proc *p)
546{
547 struct inpcb *inp;
548 int s, error;
549
550 inp = sotoinpcb(so);
551 if (inp != 0)
552 return EINVAL;
553
554 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
555 error = soreserve(so, udp_sendspace, udp_recvspace);
556 if (error)
557 return error;
558 }
559 s = splnet();
560 error = in_pcballoc(so, &udbinfo, p);
561 splx(s);
562 if (error)
563 return error;
564 inp = (struct inpcb *)so->so_pcb;
565 inp->inp_vflag |= INP_IPV6;
566 if (!ip6_v6only)
567 inp->inp_vflag |= INP_IPV4;
568 inp->in6p_hops = -1; /* use kernel default */
569 inp->in6p_cksum = -1; /* just to be sure */
570 /*
571 * XXX: ugly!!
572 * IPv4 TTL initialization is necessary for an IPv6 socket as well,
573 * because the socket may be bound to an IPv6 wildcard address,
574 * which may match an IPv4-mapped IPv6 address.
575 */
576 inp->inp_ip_ttl = ip_defttl;
577 return 0;
578}
579
580static int
581udp6_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
582{
583 struct inpcb *inp;
584 int s, error;
585
586 inp = sotoinpcb(so);
587 if (inp == 0)
588 return EINVAL;
589
590 inp->inp_vflag &= ~INP_IPV4;
591 inp->inp_vflag |= INP_IPV6;
592 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
593 struct sockaddr_in6 *sin6_p;
594
595 sin6_p = (struct sockaddr_in6 *)nam;
596
597 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
598 inp->inp_vflag |= INP_IPV4;
599 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
600 struct sockaddr_in sin;
601
602 in6_sin6_2_sin(&sin, sin6_p);
603 inp->inp_vflag |= INP_IPV4;
604 inp->inp_vflag &= ~INP_IPV6;
605 s = splnet();
606 error = in_pcbbind(inp, (struct sockaddr *)&sin, p);
607 splx(s);
608 return error;
609 }
610 }
611
612 s = splnet();
613 error = in6_pcbbind(inp, nam, p);
614 splx(s);
615 return error;
616}
617
618static int
619udp6_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
620{
621 struct inpcb *inp;
622 int s, error;
623
624 inp = sotoinpcb(so);
625 if (inp == 0)
626 return EINVAL;
627
628 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
629 struct sockaddr_in6 *sin6_p;
630
631 sin6_p = (struct sockaddr_in6 *)nam;
632 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
633 struct sockaddr_in sin;
634
635 if (inp->inp_faddr.s_addr != INADDR_ANY)
636 return EISCONN;
637 in6_sin6_2_sin(&sin, sin6_p);
638 s = splnet();
639 error = in_pcbconnect(inp, (struct sockaddr *)&sin, p);
640 splx(s);
641 if (error == 0) {
642 inp->inp_vflag |= INP_IPV4;
643 inp->inp_vflag &= ~INP_IPV6;
644 soisconnected(so);
645 }
646 return error;
647 }
648 }
649 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
650 return EISCONN;
651 s = splnet();
652 error = in6_pcbconnect(inp, nam, p);
653 splx(s);
654 if (error == 0) {
655 if (!ip6_v6only) { /* should be non mapped addr */
656 inp->inp_vflag &= ~INP_IPV4;
657 inp->inp_vflag |= INP_IPV6;
658 }
659 soisconnected(so);
660 }
661 return error;
662}
663
664static int
665udp6_detach(struct socket *so)
666{
667 struct inpcb *inp;
668 int s;
669
670 inp = sotoinpcb(so);
671 if (inp == 0)
672 return EINVAL;
673 s = splnet();
674 in6_pcbdetach(inp);
675 splx(s);
676 return 0;
677}
678
679static int
680udp6_disconnect(struct socket *so)
681{
682 struct inpcb *inp;
683 int s;
684
685 inp = sotoinpcb(so);
686 if (inp == 0)
687 return EINVAL;
688
689 if (inp->inp_vflag & INP_IPV4) {
690 struct pr_usrreqs *pru;
691
692 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
693 return ((*pru->pru_disconnect)(so));
694 }
695
696 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
697 return ENOTCONN;
698
699 s = splnet();
700 in6_pcbdisconnect(inp);
701 inp->in6p_laddr = in6addr_any;
702 splx(s);
703 so->so_state &= ~SS_ISCONNECTED; /* XXX */
704 return 0;
705}
706
707static int
708udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
709 struct mbuf *control, struct proc *p)
710{
711 struct inpcb *inp;
712 int error = 0;
713
714 inp = sotoinpcb(so);
715 if (inp == 0) {
716 error = EINVAL;
717 goto bad;
718 }
719
720 if (addr) {
721 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
722 error = EINVAL;
723 goto bad;
724 }
725 if (addr->sa_family != AF_INET6) {
726 error = EAFNOSUPPORT;
727 goto bad;
728 }
729 }
730
731 if (!ip6_v6only) {
732 int hasv4addr;
733 struct sockaddr_in6 *sin6 = 0;
734
735 if (addr == 0)
736 hasv4addr = (inp->inp_vflag & INP_IPV4);
737 else {
738 sin6 = (struct sockaddr_in6 *)addr;
739 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
740 ? 1 : 0;
741 }
742 if (hasv4addr) {
743 struct pr_usrreqs *pru;
744
745 if (sin6)
746 in6_sin6_2_sin_in_sock(addr);
747 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
748 error = ((*pru->pru_send)(so, flags, m, addr, control,
749 p));
750 /* addr will just be freed in sendit(). */
751 return error;
752 }
753 }
754
755 return udp6_output(inp, m, addr, control, p);
756
757 bad:
758 m_freem(m);
759 return(error);
760}
761
762struct pr_usrreqs udp6_usrreqs = {
763 udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect,
764 pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect,
765 pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp,
766 pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown,
767 in6_mapped_sockaddr, sosend, soreceive, sopoll
768};