Make 'last mounted on' reporting by fsck work again. Add a new option
[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 $ */
3e4150ef 2/* $DragonFly: src/sys/netinet6/udp6_usrreq.c,v 1.24 2006/12/29 18:02:56 victor 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>
abf782b3 85#include <sys/thread2.h>
984263bc
MD
86
87#include <net/if.h>
88#include <net/route.h>
89#include <net/if_types.h>
90
91#include <netinet/in.h>
92#include <netinet/in_systm.h>
93#include <netinet/ip.h>
94#include <netinet/in_pcb.h>
95#include <netinet/in_var.h>
96#include <netinet/ip_var.h>
97#include <netinet/udp.h>
98#include <netinet/udp_var.h>
99#include <netinet/ip6.h>
100#include <netinet6/ip6_var.h>
101#include <netinet6/in6_pcb.h>
102#include <netinet/icmp6.h>
103#include <netinet6/udp6_var.h>
104#include <netinet6/ip6protosw.h>
105
106#ifdef IPSEC
107#include <netinet6/ipsec.h>
108#include <netinet6/ipsec6.h>
109#endif /* IPSEC */
110
111#ifdef FAST_IPSEC
bf844ffa
JH
112#include <netproto/ipsec/ipsec.h>
113#include <netproto/ipsec/ipsec6.h>
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MD
114#endif /* FAST_IPSEC */
115
116/*
117 * UDP protocol inplementation.
118 * Per RFC 768, August, 1980.
119 */
120
121extern struct protosw inetsw[];
56d702cc
RG
122static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *);
123static int udp6_detach (struct socket *so);
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124
125static int
122ebd49 126in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp)
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MD
127{
128 struct ip6_moptions *im6o = in6p->in6p_moptions;
129 struct in6_multi_mship *imm;
130
131 if (im6o == NULL)
132 return 0;
133
134 for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
135 imm = imm->i6mm_chain.le_next) {
136 if ((ifp == NULL ||
137 imm->i6mm_maddr->in6m_ifp == ifp) &&
138 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
139 ia6))
140 return 1;
141 }
142 return 0;
143}
144
145int
dadab5e9 146udp6_input(struct mbuf **mp, int *offp, int proto)
984263bc
MD
147{
148 struct mbuf *m = *mp;
34ee9825
RG
149 struct ip6_hdr *ip6;
150 struct udphdr *uh;
151 struct inpcb *in6p;
984263bc
MD
152 struct mbuf *opts = NULL;
153 int off = *offp;
154 int plen, ulen;
155 struct sockaddr_in6 udp_in6;
156
157 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
158
159 ip6 = mtod(m, struct ip6_hdr *);
160
161 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
162 /* XXX send icmp6 host/port unreach? */
163 m_freem(m);
164 return IPPROTO_DONE;
165 }
166
167 udpstat.udps_ipackets++;
168
169 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
170 uh = (struct udphdr *)((caddr_t)ip6 + off);
171 ulen = ntohs((u_short)uh->uh_ulen);
172
173 if (plen != ulen) {
174 udpstat.udps_badlen++;
175 goto bad;
176 }
177
178 /*
179 * Checksum extended UDP header and data.
180 */
181 if (uh->uh_sum == 0)
182 udpstat.udps_nosum++;
183 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
184 udpstat.udps_badsum++;
185 goto bad;
186 }
187
188 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
189 struct inpcb *last;
190
191 /*
192 * Deliver a multicast datagram to all sockets
193 * for which the local and remote addresses and ports match
194 * those of the incoming datagram. This allows more than
195 * one process to receive multicasts on the same port.
196 * (This really ought to be done for unicast datagrams as
197 * well, but that would cause problems with existing
198 * applications that open both address-specific sockets and
199 * a wildcard socket listening to the same port -- they would
200 * end up receiving duplicates of every unicast datagram.
201 * Those applications open the multiple sockets to overcome an
202 * inadequacy of the UDP socket interface, but for backwards
203 * compatibility we avoid the problem here rather than
204 * fixing the interface. Maybe 4.5BSD will remedy this?)
205 */
206
207 /*
208 * In a case that laddr should be set to the link-local
209 * address (this happens in RIPng), the multicast address
210 * specified in the received packet does not match with
211 * laddr. To cure this situation, the matching is relaxed
212 * if the receiving interface is the same as one specified
213 * in the socket and if the destination multicast address
214 * matches one of the multicast groups specified in the socket.
215 */
216
217 /*
218 * Construct sockaddr format source address.
219 */
220 init_sin6(&udp_in6, m); /* general init */
221 udp_in6.sin6_port = uh->uh_sport;
222 /*
223 * KAME note: traditionally we dropped udpiphdr from mbuf here.
224 * We need udphdr for IPsec processing so we do that later.
225 */
226
227 /*
228 * Locate pcb(s) for datagram.
229 * (Algorithm copied from raw_intr().)
230 */
231 last = NULL;
0854930e 232 LIST_FOREACH(in6p, &udbinfo.pcblisthead, inp_list) {
bde3511a 233 if (!(in6p->inp_flags & INP_PLACEMARKER))
0854930e 234 continue;
bde3511a 235 if (!(in6p->inp_vflag & INP_IPV6))
984263bc
MD
236 continue;
237 if (in6p->in6p_lport != uh->uh_dport)
238 continue;
239 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
240 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
241 &ip6->ip6_dst) &&
242 !in6_mcmatch(in6p, &ip6->ip6_dst,
243 m->m_pkthdr.rcvif))
244 continue;
245 }
246 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
247 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
248 &ip6->ip6_src) ||
249 in6p->in6p_fport != uh->uh_sport)
250 continue;
251 }
252
253 if (last != NULL) {
254 struct mbuf *n;
255
256#ifdef IPSEC
257 /*
258 * Check AH/ESP integrity.
259 */
260 if (ipsec6_in_reject_so(m, last->inp_socket))
261 ipsec6stat.in_polvio++;
262 /* do not inject data into pcb */
263 else
264#endif /* IPSEC */
265#ifdef FAST_IPSEC
266 /*
267 * Check AH/ESP integrity.
268 */
269 if (ipsec6_in_reject(m, last))
270 ;
271 else
272#endif /* FAST_IPSEC */
273 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
274 /*
275 * KAME NOTE: do not
276 * m_copy(m, offset, ...) above.
277 * sbappendaddr() expects M_PKTHDR,
278 * and m_copy() will copy M_PKTHDR
279 * only if offset is 0.
280 */
281 if (last->in6p_flags & IN6P_CONTROLOPTS
282 || last->in6p_socket->so_options & SO_TIMESTAMP)
283 ip6_savecontrol(last, &opts,
284 ip6, n);
285
286 m_adj(n, off + sizeof(struct udphdr));
287 if (sbappendaddr(&last->in6p_socket->so_rcv,
288 (struct sockaddr *)&udp_in6,
289 n, opts) == 0) {
290 m_freem(n);
291 if (opts)
292 m_freem(opts);
293 udpstat.udps_fullsock++;
294 } else
295 sorwakeup(last->in6p_socket);
296 opts = NULL;
297 }
298 }
299 last = in6p;
300 /*
301 * Don't look for additional matches if this one does
302 * not have either the SO_REUSEPORT or SO_REUSEADDR
303 * socket options set. This heuristic avoids searching
304 * through all pcbs in the common case of a non-shared
305 * port. It assumes that an application will never
306 * clear these options after setting them.
307 */
308 if ((last->in6p_socket->so_options &
bde3511a 309 (SO_REUSEPORT | SO_REUSEADDR)) == 0)
984263bc
MD
310 break;
311 }
312
313 if (last == NULL) {
314 /*
315 * No matching pcb found; discard datagram.
316 * (No need to send an ICMP Port Unreachable
317 * for a broadcast or multicast datgram.)
318 */
319 udpstat.udps_noport++;
320 udpstat.udps_noportmcast++;
321 goto bad;
322 }
323#ifdef IPSEC
324 /*
325 * Check AH/ESP integrity.
326 */
327 if (ipsec6_in_reject_so(m, last->inp_socket)) {
328 ipsec6stat.in_polvio++;
329 goto bad;
330 }
331#endif /* IPSEC */
332#ifdef FAST_IPSEC
333 /*
334 * Check AH/ESP integrity.
335 */
336 if (ipsec6_in_reject(m, last)) {
337 goto bad;
338 }
339#endif /* FAST_IPSEC */
340 if (last->in6p_flags & IN6P_CONTROLOPTS
341 || last->in6p_socket->so_options & SO_TIMESTAMP)
342 ip6_savecontrol(last, &opts, ip6, m);
343
344 m_adj(m, off + sizeof(struct udphdr));
345 if (sbappendaddr(&last->in6p_socket->so_rcv,
346 (struct sockaddr *)&udp_in6,
347 m, opts) == 0) {
348 udpstat.udps_fullsock++;
349 goto bad;
350 }
351 sorwakeup(last->in6p_socket);
352 return IPPROTO_DONE;
353 }
354 /*
355 * Locate pcb for datagram.
356 */
357 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport,
358 &ip6->ip6_dst, uh->uh_dport, 1,
359 m->m_pkthdr.rcvif);
bde3511a 360 if (in6p == NULL) {
984263bc
MD
361 if (log_in_vain) {
362 char buf[INET6_ADDRSTRLEN];
363
364 strcpy(buf, ip6_sprintf(&ip6->ip6_dst));
365 log(LOG_INFO,
366 "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
367 buf, ntohs(uh->uh_dport),
368 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport));
369 }
370 udpstat.udps_noport++;
371 if (m->m_flags & M_MCAST) {
a6ec04bc 372 kprintf("UDP6: M_MCAST is set in a unicast packet.\n");
984263bc
MD
373 udpstat.udps_noportmcast++;
374 goto bad;
375 }
376 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
377 return IPPROTO_DONE;
378 }
379#ifdef IPSEC
380 /*
381 * Check AH/ESP integrity.
382 */
383 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) {
384 ipsec6stat.in_polvio++;
385 goto bad;
386 }
387#endif /* IPSEC */
388#ifdef FAST_IPSEC
389 /*
390 * Check AH/ESP integrity.
391 */
392 if (ipsec6_in_reject(m, in6p)) {
393 goto bad;
394 }
395#endif /* FAST_IPSEC */
396
397 /*
398 * Construct sockaddr format source address.
399 * Stuff source address and datagram in user buffer.
400 */
401 init_sin6(&udp_in6, m); /* general init */
402 udp_in6.sin6_port = uh->uh_sport;
403 if (in6p->in6p_flags & IN6P_CONTROLOPTS
404 || in6p->in6p_socket->so_options & SO_TIMESTAMP)
405 ip6_savecontrol(in6p, &opts, ip6, m);
406 m_adj(m, off + sizeof(struct udphdr));
407 if (sbappendaddr(&in6p->in6p_socket->so_rcv,
408 (struct sockaddr *)&udp_in6,
409 m, opts) == 0) {
410 udpstat.udps_fullsock++;
411 goto bad;
412 }
413 sorwakeup(in6p->in6p_socket);
414 return IPPROTO_DONE;
415bad:
416 if (m)
417 m_freem(m);
418 if (opts)
419 m_freem(opts);
420 return IPPROTO_DONE;
421}
422
423void
122ebd49 424udp6_ctlinput(int cmd, struct sockaddr *sa, void *d)
984263bc
MD
425{
426 struct udphdr uh;
427 struct ip6_hdr *ip6;
428 struct mbuf *m;
429 int off = 0;
430 struct ip6ctlparam *ip6cp = NULL;
431 const struct sockaddr_in6 *sa6_src = NULL;
56d702cc 432 void (*notify) (struct inpcb *, int) = udp_notify;
984263bc
MD
433 struct udp_portonly {
434 u_int16_t uh_sport;
435 u_int16_t uh_dport;
436 } *uhp;
437
438 if (sa->sa_family != AF_INET6 ||
439 sa->sa_len != sizeof(struct sockaddr_in6))
440 return;
441
442 if ((unsigned)cmd >= PRC_NCMDS)
443 return;
444 if (PRC_IS_REDIRECT(cmd))
445 notify = in6_rtchange, d = NULL;
446 else if (cmd == PRC_HOSTDEAD)
447 d = NULL;
448 else if (inet6ctlerrmap[cmd] == 0)
449 return;
450
451 /* if the parameter is from icmp6, decode it. */
452 if (d != NULL) {
453 ip6cp = (struct ip6ctlparam *)d;
454 m = ip6cp->ip6c_m;
455 ip6 = ip6cp->ip6c_ip6;
456 off = ip6cp->ip6c_off;
457 sa6_src = ip6cp->ip6c_src;
458 } else {
459 m = NULL;
460 ip6 = NULL;
461 sa6_src = &sa6_any;
462 }
463
464 if (ip6) {
465 /*
466 * XXX: We assume that when IPV6 is non NULL,
467 * M and OFF are valid.
468 */
469
470 /* check if we can safely examine src and dst ports */
471 if (m->m_pkthdr.len < off + sizeof(*uhp))
472 return;
473
474 bzero(&uh, sizeof(uh));
475 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
476
7d448528
JH
477 in6_pcbnotify(&udbinfo.pcblisthead, sa, uh.uh_dport,
478 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport,
479 cmd, 0, notify);
984263bc 480 } else
7d448528
JH
481 in6_pcbnotify(&udbinfo.pcblisthead, sa, 0,
482 (const struct sockaddr *)sa6_src, 0,
483 cmd, 0, notify);
984263bc
MD
484}
485
486static int
487udp6_getcred(SYSCTL_HANDLER_ARGS)
488{
489 struct sockaddr_in6 addrs[2];
490 struct inpcb *inp;
abf782b3 491 int error;
984263bc 492
dadab5e9 493 error = suser(req->td);
984263bc
MD
494 if (error)
495 return (error);
496
497 if (req->newlen != sizeof(addrs))
498 return (EINVAL);
499 if (req->oldlen != sizeof(struct ucred))
500 return (EINVAL);
501 error = SYSCTL_IN(req, addrs, sizeof(addrs));
502 if (error)
503 return (error);
abf782b3 504 crit_enter();
984263bc
MD
505 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr,
506 addrs[1].sin6_port,
507 &addrs[0].sin6_addr, addrs[0].sin6_port,
508 1, NULL);
509 if (!inp || !inp->inp_socket) {
510 error = ENOENT;
511 goto out;
512 }
513 error = SYSCTL_OUT(req, inp->inp_socket->so_cred,
514 sizeof(struct ucred));
515
516out:
abf782b3 517 crit_exit();
984263bc
MD
518 return (error);
519}
520
521SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
522 0, 0,
523 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection");
524
525static int
526udp6_abort(struct socket *so)
527{
528 struct inpcb *inp;
984263bc 529
ed894f8c 530 inp = so->so_pcb;
bde3511a 531 if (inp == NULL)
984263bc
MD
532 return EINVAL; /* ??? possible? panic instead? */
533 soisdisconnected(so);
abf782b3 534 crit_enter();
984263bc 535 in6_pcbdetach(inp);
abf782b3 536 crit_exit();
984263bc
MD
537 return 0;
538}
539
540static int
e4700d00 541udp6_attach(struct socket *so, int proto, struct pru_attach_info *ai)
984263bc
MD
542{
543 struct inpcb *inp;
abf782b3 544 int error;
984263bc 545
ed894f8c 546 inp = so->so_pcb;
bde3511a 547 if (inp != NULL)
984263bc
MD
548 return EINVAL;
549
550 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
e4700d00
JH
551 error = soreserve(so, udp_sendspace, udp_recvspace,
552 ai->sb_rlimit);
984263bc
MD
553 if (error)
554 return error;
555 }
abf782b3 556 crit_enter();
e4700d00 557 error = in_pcballoc(so, &udbinfo);
abf782b3 558 crit_exit();
984263bc
MD
559 if (error)
560 return error;
561 inp = (struct inpcb *)so->so_pcb;
562 inp->inp_vflag |= INP_IPV6;
563 if (!ip6_v6only)
564 inp->inp_vflag |= INP_IPV4;
565 inp->in6p_hops = -1; /* use kernel default */
566 inp->in6p_cksum = -1; /* just to be sure */
567 /*
568 * XXX: ugly!!
569 * IPv4 TTL initialization is necessary for an IPv6 socket as well,
570 * because the socket may be bound to an IPv6 wildcard address,
571 * which may match an IPv4-mapped IPv6 address.
572 */
573 inp->inp_ip_ttl = ip_defttl;
574 return 0;
575}
576
577static int
dadab5e9 578udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
984263bc 579{
2322f6ca 580 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam;
984263bc 581 struct inpcb *inp;
abf782b3 582 int error;
984263bc 583
ed894f8c 584 inp = so->so_pcb;
bde3511a 585 if (inp == NULL)
984263bc
MD
586 return EINVAL;
587
588 inp->inp_vflag &= ~INP_IPV4;
589 inp->inp_vflag |= INP_IPV6;
bde3511a 590 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
984263bc
MD
591 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
592 inp->inp_vflag |= INP_IPV4;
593 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
594 struct sockaddr_in sin;
595
596 in6_sin6_2_sin(&sin, sin6_p);
597 inp->inp_vflag |= INP_IPV4;
598 inp->inp_vflag &= ~INP_IPV6;
abf782b3 599 crit_enter();
dadab5e9 600 error = in_pcbbind(inp, (struct sockaddr *)&sin, td);
abf782b3 601 crit_exit();
984263bc
MD
602 return error;
603 }
604 }
605
abf782b3 606 crit_enter();
dadab5e9 607 error = in6_pcbbind(inp, nam, td);
abf782b3 608 crit_exit();
f772087c
JH
609 if (error == 0) {
610 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
611 inp->inp_flags |= INP_WASBOUND_NOTANY;
612 in_pcbinswildcardhash(inp);
613 }
984263bc
MD
614 return error;
615}
616
617static int
dadab5e9 618udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
984263bc
MD
619{
620 struct inpcb *inp;
abf782b3 621 int error;
984263bc 622
ed894f8c 623 inp = so->so_pcb;
bde3511a 624 if (inp == NULL)
984263bc
MD
625 return EINVAL;
626
bde3511a 627 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
984263bc
MD
628 struct sockaddr_in6 *sin6_p;
629
630 sin6_p = (struct sockaddr_in6 *)nam;
631 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
632 struct sockaddr_in sin;
633
634 if (inp->inp_faddr.s_addr != INADDR_ANY)
635 return EISCONN;
636 in6_sin6_2_sin(&sin, sin6_p);
abf782b3 637 crit_enter();
dadab5e9 638 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td);
abf782b3 639 crit_exit();
984263bc
MD
640 if (error == 0) {
641 inp->inp_vflag |= INP_IPV4;
642 inp->inp_vflag &= ~INP_IPV6;
643 soisconnected(so);
644 }
645 return error;
646 }
647 }
648 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
649 return EISCONN;
2322f6ca
JH
650 if (inp->inp_flags & INP_WILDCARD)
651 in_pcbremwildcardhash(inp);
3e4150ef
VBD
652 if (!prison_remote_ip(td, nam))
653 return(EAFNOSUPPORT); /* IPv4 only jail */
abf782b3 654 crit_enter();
dadab5e9 655 error = in6_pcbconnect(inp, nam, td);
abf782b3 656 crit_exit();
984263bc
MD
657 if (error == 0) {
658 if (!ip6_v6only) { /* should be non mapped addr */
659 inp->inp_vflag &= ~INP_IPV4;
660 inp->inp_vflag |= INP_IPV6;
661 }
662 soisconnected(so);
2322f6ca
JH
663 } else if (error == EAFNOSUPPORT) { /* connection dissolved */
664 /*
665 * Follow traditional BSD behavior and retain
666 * the local port binding. But, fix the old misbehavior
667 * of overwriting any previously bound local address.
668 */
669 if (!(inp->inp_flags & INP_WASBOUND_NOTANY))
84204577 670 inp->in6p_laddr = kin6addr_any;
2322f6ca 671 in_pcbinswildcardhash(inp);
984263bc
MD
672 }
673 return error;
674}
675
676static int
677udp6_detach(struct socket *so)
678{
679 struct inpcb *inp;
984263bc 680
ed894f8c 681 inp = so->so_pcb;
bde3511a 682 if (inp == NULL)
984263bc 683 return EINVAL;
abf782b3 684 crit_enter();
984263bc 685 in6_pcbdetach(inp);
abf782b3 686 crit_exit();
984263bc
MD
687 return 0;
688}
689
690static int
691udp6_disconnect(struct socket *so)
692{
693 struct inpcb *inp;
984263bc 694
ed894f8c 695 inp = so->so_pcb;
bde3511a 696 if (inp == NULL)
984263bc
MD
697 return EINVAL;
698
699 if (inp->inp_vflag & INP_IPV4) {
68925b20 700 const struct pr_usrreqs *pru;
984263bc
MD
701
702 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
703 return ((*pru->pru_disconnect)(so));
704 }
705
706 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
707 return ENOTCONN;
708
abf782b3 709 crit_enter();
984263bc 710 in6_pcbdisconnect(inp);
abf782b3 711 crit_exit();
984263bc
MD
712 so->so_state &= ~SS_ISCONNECTED; /* XXX */
713 return 0;
714}
715
716static int
717udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
dadab5e9 718 struct mbuf *control, struct thread *td)
984263bc
MD
719{
720 struct inpcb *inp;
721 int error = 0;
722
ed894f8c 723 inp = so->so_pcb;
bde3511a 724 if (inp == NULL) {
984263bc
MD
725 error = EINVAL;
726 goto bad;
727 }
728
729 if (addr) {
bde3511a 730 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
984263bc
MD
731 error = EINVAL;
732 goto bad;
733 }
734 if (addr->sa_family != AF_INET6) {
735 error = EAFNOSUPPORT;
736 goto bad;
737 }
738 }
739
740 if (!ip6_v6only) {
741 int hasv4addr;
742 struct sockaddr_in6 *sin6 = 0;
743
bde3511a 744 if (addr == NULL)
984263bc
MD
745 hasv4addr = (inp->inp_vflag & INP_IPV4);
746 else {
747 sin6 = (struct sockaddr_in6 *)addr;
748 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
749 ? 1 : 0;
750 }
751 if (hasv4addr) {
68925b20 752 const struct pr_usrreqs *pru;
984263bc
MD
753
754 if (sin6)
755 in6_sin6_2_sin_in_sock(addr);
756 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
ab1c1714
MD
757 error = ((*pru->pru_send)(so, flags, m, addr,
758 control, td));
984263bc
MD
759 /* addr will just be freed in sendit(). */
760 return error;
761 }
762 }
763
dadab5e9 764 return udp6_output(inp, m, addr, control, td);
984263bc 765
bde3511a 766bad:
984263bc 767 m_freem(m);
bde3511a 768 return (error);
984263bc
MD
769}
770
771struct pr_usrreqs udp6_usrreqs = {
772 udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect,
773 pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect,
774 pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp,
775 pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown,
776 in6_mapped_sockaddr, sosend, soreceive, sopoll
777};