network - Completely revamp the netisr / dispatch code
[dragonfly.git] / sys / netinet6 / udp6_usrreq.c
CommitLineData
984263bc 1/* $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.13 2003/01/24 05:11:35 sam Exp $ */
6d49aa6f 2/* $DragonFly: src/sys/netinet6/udp6_usrreq.c,v 1.26 2007/04/22 01:13:14 dillon Exp $ */
984263bc
MD
3/* $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ */
4
5/*
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34/*
35 * Copyright (c) 1982, 1986, 1989, 1993
36 * The Regents of the University of California. All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by the University of
49 * California, Berkeley and its contributors.
50 * 4. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 *
66 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
67 */
68
69#include "opt_inet.h"
70#include "opt_inet6.h"
71#include "opt_ipsec.h"
72
73#include <sys/param.h>
74#include <sys/kernel.h>
75#include <sys/mbuf.h>
76#include <sys/protosw.h>
77#include <sys/socket.h>
78#include <sys/socketvar.h>
79#include <sys/sysctl.h>
80#include <sys/errno.h>
81#include <sys/stat.h>
82#include <sys/systm.h>
83#include <sys/syslog.h>
84#include <sys/proc.h>
895c1f85 85#include <sys/priv.h>
abf782b3 86#include <sys/thread2.h>
984263bc
MD
87
88#include <net/if.h>
89#include <net/route.h>
90#include <net/if_types.h>
91
92#include <netinet/in.h>
93#include <netinet/in_systm.h>
94#include <netinet/ip.h>
95#include <netinet/in_pcb.h>
96#include <netinet/in_var.h>
97#include <netinet/ip_var.h>
98#include <netinet/udp.h>
99#include <netinet/udp_var.h>
100#include <netinet/ip6.h>
101#include <netinet6/ip6_var.h>
102#include <netinet6/in6_pcb.h>
103#include <netinet/icmp6.h>
104#include <netinet6/udp6_var.h>
105#include <netinet6/ip6protosw.h>
106
107#ifdef IPSEC
108#include <netinet6/ipsec.h>
109#include <netinet6/ipsec6.h>
110#endif /* IPSEC */
111
112#ifdef FAST_IPSEC
bf844ffa
JH
113#include <netproto/ipsec/ipsec.h>
114#include <netproto/ipsec/ipsec6.h>
984263bc
MD
115#endif /* FAST_IPSEC */
116
117/*
118 * UDP protocol inplementation.
119 * Per RFC 768, August, 1980.
120 */
121
122extern struct protosw inetsw[];
56d702cc
RG
123static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *);
124static int udp6_detach (struct socket *so);
984263bc
MD
125
126static int
122ebd49 127in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp)
984263bc
MD
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
dadab5e9 147udp6_input(struct mbuf **mp, int *offp, int proto)
984263bc
MD
148{
149 struct mbuf *m = *mp;
34ee9825
RG
150 struct ip6_hdr *ip6;
151 struct udphdr *uh;
152 struct inpcb *in6p;
984263bc
MD
153 struct mbuf *opts = NULL;
154 int off = *offp;
155 int plen, ulen;
156 struct sockaddr_in6 udp_in6;
157
158 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
159
160 ip6 = mtod(m, struct ip6_hdr *);
161
162 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
163 /* XXX send icmp6 host/port unreach? */
164 m_freem(m);
165 return IPPROTO_DONE;
166 }
167
168 udpstat.udps_ipackets++;
169
170 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
171 uh = (struct udphdr *)((caddr_t)ip6 + off);
172 ulen = ntohs((u_short)uh->uh_ulen);
173
174 if (plen != ulen) {
175 udpstat.udps_badlen++;
176 goto bad;
177 }
178
179 /*
180 * Checksum extended UDP header and data.
181 */
182 if (uh->uh_sum == 0)
183 udpstat.udps_nosum++;
184 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
185 udpstat.udps_badsum++;
186 goto bad;
187 }
188
189 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
190 struct inpcb *last;
191
192 /*
193 * Deliver a multicast datagram to all sockets
194 * for which the local and remote addresses and ports match
195 * those of the incoming datagram. This allows more than
196 * one process to receive multicasts on the same port.
197 * (This really ought to be done for unicast datagrams as
198 * well, but that would cause problems with existing
199 * applications that open both address-specific sockets and
200 * a wildcard socket listening to the same port -- they would
201 * end up receiving duplicates of every unicast datagram.
202 * Those applications open the multiple sockets to overcome an
203 * inadequacy of the UDP socket interface, but for backwards
204 * compatibility we avoid the problem here rather than
205 * fixing the interface. Maybe 4.5BSD will remedy this?)
206 */
207
208 /*
209 * In a case that laddr should be set to the link-local
210 * address (this happens in RIPng), the multicast address
211 * specified in the received packet does not match with
212 * laddr. To cure this situation, the matching is relaxed
213 * if the receiving interface is the same as one specified
214 * in the socket and if the destination multicast address
215 * matches one of the multicast groups specified in the socket.
216 */
217
218 /*
219 * Construct sockaddr format source address.
220 */
221 init_sin6(&udp_in6, m); /* general init */
222 udp_in6.sin6_port = uh->uh_sport;
223 /*
224 * KAME note: traditionally we dropped udpiphdr from mbuf here.
225 * We need udphdr for IPsec processing so we do that later.
226 */
227
228 /*
229 * Locate pcb(s) for datagram.
230 * (Algorithm copied from raw_intr().)
231 */
232 last = NULL;
0854930e 233 LIST_FOREACH(in6p, &udbinfo.pcblisthead, inp_list) {
912e6795 234 if (in6p->inp_flags & INP_PLACEMARKER)
0854930e 235 continue;
bde3511a 236 if (!(in6p->inp_vflag & INP_IPV6))
984263bc
MD
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.
6d49aa6f 278 * ssb_appendaddr() expects M_PKTHDR,
984263bc
MD
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));
6d49aa6f 288 if (ssb_appendaddr(&last->in6p_socket->so_rcv,
984263bc
MD
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 &
bde3511a 310 (SO_REUSEPORT | SO_REUSEADDR)) == 0)
984263bc
MD
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));
6d49aa6f 346 if (ssb_appendaddr(&last->in6p_socket->so_rcv,
984263bc
MD
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);
bde3511a 361 if (in6p == NULL) {
984263bc
MD
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) {
a6ec04bc 373 kprintf("UDP6: M_MCAST is set in a unicast packet.\n");
984263bc
MD
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));
6d49aa6f 408 if (ssb_appendaddr(&in6p->in6p_socket->so_rcv,
984263bc
MD
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
122ebd49 425udp6_ctlinput(int cmd, struct sockaddr *sa, void *d)
984263bc
MD
426{
427 struct udphdr uh;
428 struct ip6_hdr *ip6;
429 struct mbuf *m;
430 int off = 0;
431 struct ip6ctlparam *ip6cp = NULL;
432 const struct sockaddr_in6 *sa6_src = NULL;
56d702cc 433 void (*notify) (struct inpcb *, int) = udp_notify;
984263bc
MD
434 struct udp_portonly {
435 u_int16_t uh_sport;
436 u_int16_t uh_dport;
437 } *uhp;
438
439 if (sa->sa_family != AF_INET6 ||
440 sa->sa_len != sizeof(struct sockaddr_in6))
441 return;
442
443 if ((unsigned)cmd >= PRC_NCMDS)
444 return;
445 if (PRC_IS_REDIRECT(cmd))
446 notify = in6_rtchange, d = NULL;
447 else if (cmd == PRC_HOSTDEAD)
448 d = NULL;
449 else if (inet6ctlerrmap[cmd] == 0)
450 return;
451
452 /* if the parameter is from icmp6, decode it. */
453 if (d != NULL) {
454 ip6cp = (struct ip6ctlparam *)d;
455 m = ip6cp->ip6c_m;
456 ip6 = ip6cp->ip6c_ip6;
457 off = ip6cp->ip6c_off;
458 sa6_src = ip6cp->ip6c_src;
459 } else {
460 m = NULL;
461 ip6 = NULL;
462 sa6_src = &sa6_any;
463 }
464
465 if (ip6) {
466 /*
467 * XXX: We assume that when IPV6 is non NULL,
468 * M and OFF are valid.
469 */
470
471 /* check if we can safely examine src and dst ports */
472 if (m->m_pkthdr.len < off + sizeof(*uhp))
473 return;
474
475 bzero(&uh, sizeof(uh));
476 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
477
7d448528
JH
478 in6_pcbnotify(&udbinfo.pcblisthead, sa, uh.uh_dport,
479 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport,
480 cmd, 0, notify);
984263bc 481 } else
7d448528
JH
482 in6_pcbnotify(&udbinfo.pcblisthead, sa, 0,
483 (const struct sockaddr *)sa6_src, 0,
484 cmd, 0, notify);
984263bc
MD
485}
486
487static int
488udp6_getcred(SYSCTL_HANDLER_ARGS)
489{
490 struct sockaddr_in6 addrs[2];
491 struct inpcb *inp;
abf782b3 492 int error;
984263bc 493
895c1f85 494 error = priv_check(req->td, PRIV_ROOT);
984263bc
MD
495 if (error)
496 return (error);
497
498 if (req->newlen != sizeof(addrs))
499 return (EINVAL);
500 if (req->oldlen != sizeof(struct ucred))
501 return (EINVAL);
502 error = SYSCTL_IN(req, addrs, sizeof(addrs));
503 if (error)
504 return (error);
abf782b3 505 crit_enter();
984263bc
MD
506 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr,
507 addrs[1].sin6_port,
508 &addrs[0].sin6_addr, addrs[0].sin6_port,
509 1, NULL);
510 if (!inp || !inp->inp_socket) {
511 error = ENOENT;
512 goto out;
513 }
514 error = SYSCTL_OUT(req, inp->inp_socket->so_cred,
515 sizeof(struct ucred));
516
517out:
abf782b3 518 crit_exit();
984263bc
MD
519 return (error);
520}
521
522SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
523 0, 0,
524 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection");
525
526static int
527udp6_abort(struct socket *so)
528{
529 struct inpcb *inp;
984263bc 530
ed894f8c 531 inp = so->so_pcb;
bde3511a 532 if (inp == NULL)
984263bc
MD
533 return EINVAL; /* ??? possible? panic instead? */
534 soisdisconnected(so);
abf782b3 535 crit_enter();
984263bc 536 in6_pcbdetach(inp);
abf782b3 537 crit_exit();
984263bc
MD
538 return 0;
539}
540
541static int
e4700d00 542udp6_attach(struct socket *so, int proto, struct pru_attach_info *ai)
984263bc
MD
543{
544 struct inpcb *inp;
abf782b3 545 int error;
984263bc 546
ed894f8c 547 inp = so->so_pcb;
bde3511a 548 if (inp != NULL)
984263bc
MD
549 return EINVAL;
550
6d49aa6f 551 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) {
e4700d00
JH
552 error = soreserve(so, udp_sendspace, udp_recvspace,
553 ai->sb_rlimit);
984263bc
MD
554 if (error)
555 return error;
556 }
abf782b3 557 crit_enter();
e4700d00 558 error = in_pcballoc(so, &udbinfo);
abf782b3 559 crit_exit();
984263bc
MD
560 if (error)
561 return error;
48e7b118 562 so->so_port = udp_soport_attach(so);
984263bc
MD
563 inp = (struct inpcb *)so->so_pcb;
564 inp->inp_vflag |= INP_IPV6;
565 if (!ip6_v6only)
566 inp->inp_vflag |= INP_IPV4;
567 inp->in6p_hops = -1; /* use kernel default */
568 inp->in6p_cksum = -1; /* just to be sure */
569 /*
570 * XXX: ugly!!
571 * IPv4 TTL initialization is necessary for an IPv6 socket as well,
572 * because the socket may be bound to an IPv6 wildcard address,
573 * which may match an IPv4-mapped IPv6 address.
574 */
575 inp->inp_ip_ttl = ip_defttl;
576 return 0;
577}
578
579static int
dadab5e9 580udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
984263bc 581{
2322f6ca 582 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam;
984263bc 583 struct inpcb *inp;
abf782b3 584 int error;
984263bc 585
ed894f8c 586 inp = so->so_pcb;
bde3511a 587 if (inp == NULL)
984263bc
MD
588 return EINVAL;
589
590 inp->inp_vflag &= ~INP_IPV4;
591 inp->inp_vflag |= INP_IPV6;
bde3511a 592 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
984263bc
MD
593 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
594 inp->inp_vflag |= INP_IPV4;
595 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
596 struct sockaddr_in sin;
597
598 in6_sin6_2_sin(&sin, sin6_p);
599 inp->inp_vflag |= INP_IPV4;
600 inp->inp_vflag &= ~INP_IPV6;
abf782b3 601 crit_enter();
dadab5e9 602 error = in_pcbbind(inp, (struct sockaddr *)&sin, td);
abf782b3 603 crit_exit();
984263bc
MD
604 return error;
605 }
606 }
607
abf782b3 608 crit_enter();
dadab5e9 609 error = in6_pcbbind(inp, nam, td);
abf782b3 610 crit_exit();
f772087c
JH
611 if (error == 0) {
612 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
613 inp->inp_flags |= INP_WASBOUND_NOTANY;
614 in_pcbinswildcardhash(inp);
615 }
984263bc
MD
616 return error;
617}
618
619static int
dadab5e9 620udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
984263bc
MD
621{
622 struct inpcb *inp;
abf782b3 623 int error;
984263bc 624
ed894f8c 625 inp = so->so_pcb;
bde3511a 626 if (inp == NULL)
984263bc
MD
627 return EINVAL;
628
bde3511a 629 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
984263bc
MD
630 struct sockaddr_in6 *sin6_p;
631
632 sin6_p = (struct sockaddr_in6 *)nam;
633 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
634 struct sockaddr_in sin;
635
636 if (inp->inp_faddr.s_addr != INADDR_ANY)
637 return EISCONN;
638 in6_sin6_2_sin(&sin, sin6_p);
abf782b3 639 crit_enter();
dadab5e9 640 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td);
abf782b3 641 crit_exit();
984263bc
MD
642 if (error == 0) {
643 inp->inp_vflag |= INP_IPV4;
644 inp->inp_vflag &= ~INP_IPV6;
645 soisconnected(so);
646 }
647 return error;
648 }
649 }
650 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
651 return EISCONN;
2322f6ca
JH
652 if (inp->inp_flags & INP_WILDCARD)
653 in_pcbremwildcardhash(inp);
3e4150ef
VBD
654 if (!prison_remote_ip(td, nam))
655 return(EAFNOSUPPORT); /* IPv4 only jail */
abf782b3 656 crit_enter();
dadab5e9 657 error = in6_pcbconnect(inp, nam, td);
abf782b3 658 crit_exit();
984263bc
MD
659 if (error == 0) {
660 if (!ip6_v6only) { /* should be non mapped addr */
661 inp->inp_vflag &= ~INP_IPV4;
662 inp->inp_vflag |= INP_IPV6;
663 }
48e7b118 664 /* sosetport(so, port); here, see udp v4 code */
984263bc 665 soisconnected(so);
2322f6ca
JH
666 } else if (error == EAFNOSUPPORT) { /* connection dissolved */
667 /*
668 * Follow traditional BSD behavior and retain
669 * the local port binding. But, fix the old misbehavior
670 * of overwriting any previously bound local address.
671 */
672 if (!(inp->inp_flags & INP_WASBOUND_NOTANY))
84204577 673 inp->in6p_laddr = kin6addr_any;
2322f6ca 674 in_pcbinswildcardhash(inp);
984263bc
MD
675 }
676 return error;
677}
678
679static int
680udp6_detach(struct socket *so)
681{
682 struct inpcb *inp;
984263bc 683
ed894f8c 684 inp = so->so_pcb;
bde3511a 685 if (inp == NULL)
984263bc 686 return EINVAL;
abf782b3 687 crit_enter();
984263bc 688 in6_pcbdetach(inp);
abf782b3 689 crit_exit();
984263bc
MD
690 return 0;
691}
692
693static int
694udp6_disconnect(struct socket *so)
695{
696 struct inpcb *inp;
984263bc 697
ed894f8c 698 inp = so->so_pcb;
bde3511a 699 if (inp == NULL)
984263bc
MD
700 return EINVAL;
701
702 if (inp->inp_vflag & INP_IPV4) {
68925b20 703 const struct pr_usrreqs *pru;
984263bc
MD
704
705 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
706 return ((*pru->pru_disconnect)(so));
707 }
708
709 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
710 return ENOTCONN;
711
abf782b3 712 crit_enter();
984263bc 713 in6_pcbdisconnect(inp);
abf782b3 714 crit_exit();
984263bc
MD
715 so->so_state &= ~SS_ISCONNECTED; /* XXX */
716 return 0;
717}
718
719static int
720udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
dadab5e9 721 struct mbuf *control, struct thread *td)
984263bc
MD
722{
723 struct inpcb *inp;
724 int error = 0;
725
ed894f8c 726 inp = so->so_pcb;
bde3511a 727 if (inp == NULL) {
984263bc
MD
728 error = EINVAL;
729 goto bad;
730 }
731
732 if (addr) {
bde3511a 733 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
984263bc
MD
734 error = EINVAL;
735 goto bad;
736 }
737 if (addr->sa_family != AF_INET6) {
738 error = EAFNOSUPPORT;
739 goto bad;
740 }
741 }
742
743 if (!ip6_v6only) {
744 int hasv4addr;
745 struct sockaddr_in6 *sin6 = 0;
746
bde3511a 747 if (addr == NULL)
984263bc
MD
748 hasv4addr = (inp->inp_vflag & INP_IPV4);
749 else {
750 sin6 = (struct sockaddr_in6 *)addr;
751 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
752 ? 1 : 0;
753 }
754 if (hasv4addr) {
68925b20 755 const struct pr_usrreqs *pru;
984263bc
MD
756
757 if (sin6)
758 in6_sin6_2_sin_in_sock(addr);
759 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
ab1c1714
MD
760 error = ((*pru->pru_send)(so, flags, m, addr,
761 control, td));
984263bc
MD
762 /* addr will just be freed in sendit(). */
763 return error;
764 }
765 }
766
dadab5e9 767 return udp6_output(inp, m, addr, control, td);
984263bc 768
bde3511a 769bad:
984263bc 770 m_freem(m);
bde3511a 771 return (error);
984263bc
MD
772}
773
774struct pr_usrreqs udp6_usrreqs = {
fa5e758c
MD
775 .pru_abort = udp6_abort,
776 .pru_accept = pru_accept_notsupp,
777 .pru_attach = udp6_attach,
778 .pru_bind = udp6_bind,
779 .pru_connect = udp6_connect,
780 .pru_connect2 = pru_connect2_notsupp,
781 .pru_control = in6_control,
782 .pru_detach = udp6_detach,
783 .pru_disconnect = udp6_disconnect,
784 .pru_listen = pru_listen_notsupp,
785 .pru_peeraddr = in6_mapped_peeraddr,
786 .pru_rcvd = pru_rcvd_notsupp,
787 .pru_rcvoob = pru_rcvoob_notsupp,
788 .pru_send = udp6_send,
789 .pru_sense = pru_sense_null,
790 .pru_shutdown = udp_shutdown,
791 .pru_sockaddr = in6_mapped_sockaddr,
792 .pru_sosend = sosend,
8b5c39bb 793 .pru_soreceive = soreceive
984263bc 794};
fa5e758c 795