vkernel - Improve memory image file startup
[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>
6cef7136 86
abf782b3 87#include <sys/thread2.h>
6cef7136 88#include <sys/socketvar2.h>
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89
90#include <net/if.h>
91#include <net/route.h>
92#include <net/if_types.h>
93
94#include <netinet/in.h>
95#include <netinet/in_systm.h>
96#include <netinet/ip.h>
97#include <netinet/in_pcb.h>
98#include <netinet/in_var.h>
99#include <netinet/ip_var.h>
100#include <netinet/udp.h>
101#include <netinet/udp_var.h>
102#include <netinet/ip6.h>
103#include <netinet6/ip6_var.h>
104#include <netinet6/in6_pcb.h>
105#include <netinet/icmp6.h>
106#include <netinet6/udp6_var.h>
107#include <netinet6/ip6protosw.h>
108
109#ifdef IPSEC
110#include <netinet6/ipsec.h>
111#include <netinet6/ipsec6.h>
112#endif /* IPSEC */
113
114#ifdef FAST_IPSEC
bf844ffa
JH
115#include <netproto/ipsec/ipsec.h>
116#include <netproto/ipsec/ipsec6.h>
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117#endif /* FAST_IPSEC */
118
119/*
120 * UDP protocol inplementation.
121 * Per RFC 768, August, 1980.
122 */
123
124extern struct protosw inetsw[];
56d702cc
RG
125static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *);
126static int udp6_detach (struct socket *so);
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127
128static int
122ebd49 129in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp)
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130{
131 struct ip6_moptions *im6o = in6p->in6p_moptions;
132 struct in6_multi_mship *imm;
133
134 if (im6o == NULL)
135 return 0;
136
137 for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
138 imm = imm->i6mm_chain.le_next) {
139 if ((ifp == NULL ||
140 imm->i6mm_maddr->in6m_ifp == ifp) &&
141 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
142 ia6))
143 return 1;
144 }
145 return 0;
146}
147
148int
dadab5e9 149udp6_input(struct mbuf **mp, int *offp, int proto)
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150{
151 struct mbuf *m = *mp;
34ee9825
RG
152 struct ip6_hdr *ip6;
153 struct udphdr *uh;
154 struct inpcb *in6p;
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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;
0854930e 235 LIST_FOREACH(in6p, &udbinfo.pcblisthead, inp_list) {
912e6795 236 if (in6p->inp_flags & INP_PLACEMARKER)
0854930e 237 continue;
bde3511a 238 if (!(in6p->inp_vflag & INP_IPV6))
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MD
239 continue;
240 if (in6p->in6p_lport != uh->uh_dport)
241 continue;
242 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
243 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
244 &ip6->ip6_dst) &&
245 !in6_mcmatch(in6p, &ip6->ip6_dst,
246 m->m_pkthdr.rcvif))
247 continue;
248 }
249 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
250 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
251 &ip6->ip6_src) ||
252 in6p->in6p_fport != uh->uh_sport)
253 continue;
254 }
255
256 if (last != NULL) {
257 struct mbuf *n;
258
259#ifdef IPSEC
260 /*
261 * Check AH/ESP integrity.
262 */
263 if (ipsec6_in_reject_so(m, last->inp_socket))
264 ipsec6stat.in_polvio++;
265 /* do not inject data into pcb */
266 else
267#endif /* IPSEC */
268#ifdef FAST_IPSEC
269 /*
270 * Check AH/ESP integrity.
271 */
272 if (ipsec6_in_reject(m, last))
273 ;
274 else
275#endif /* FAST_IPSEC */
276 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
277 /*
278 * KAME NOTE: do not
279 * m_copy(m, offset, ...) above.
6d49aa6f 280 * ssb_appendaddr() expects M_PKTHDR,
984263bc
MD
281 * and m_copy() will copy M_PKTHDR
282 * only if offset is 0.
283 */
284 if (last->in6p_flags & IN6P_CONTROLOPTS
285 || last->in6p_socket->so_options & SO_TIMESTAMP)
286 ip6_savecontrol(last, &opts,
287 ip6, n);
288
289 m_adj(n, off + sizeof(struct udphdr));
6d49aa6f 290 if (ssb_appendaddr(&last->in6p_socket->so_rcv,
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MD
291 (struct sockaddr *)&udp_in6,
292 n, opts) == 0) {
293 m_freem(n);
294 if (opts)
295 m_freem(opts);
296 udpstat.udps_fullsock++;
297 } else
298 sorwakeup(last->in6p_socket);
299 opts = NULL;
300 }
301 }
302 last = in6p;
303 /*
304 * Don't look for additional matches if this one does
305 * not have either the SO_REUSEPORT or SO_REUSEADDR
306 * socket options set. This heuristic avoids searching
307 * through all pcbs in the common case of a non-shared
308 * port. It assumes that an application will never
309 * clear these options after setting them.
310 */
311 if ((last->in6p_socket->so_options &
bde3511a 312 (SO_REUSEPORT | SO_REUSEADDR)) == 0)
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MD
313 break;
314 }
315
316 if (last == NULL) {
317 /*
318 * No matching pcb found; discard datagram.
319 * (No need to send an ICMP Port Unreachable
320 * for a broadcast or multicast datgram.)
321 */
322 udpstat.udps_noport++;
323 udpstat.udps_noportmcast++;
324 goto bad;
325 }
326#ifdef IPSEC
327 /*
328 * Check AH/ESP integrity.
329 */
330 if (ipsec6_in_reject_so(m, last->inp_socket)) {
331 ipsec6stat.in_polvio++;
332 goto bad;
333 }
334#endif /* IPSEC */
335#ifdef FAST_IPSEC
336 /*
337 * Check AH/ESP integrity.
338 */
339 if (ipsec6_in_reject(m, last)) {
340 goto bad;
341 }
342#endif /* FAST_IPSEC */
343 if (last->in6p_flags & IN6P_CONTROLOPTS
344 || last->in6p_socket->so_options & SO_TIMESTAMP)
345 ip6_savecontrol(last, &opts, ip6, m);
346
347 m_adj(m, off + sizeof(struct udphdr));
6d49aa6f 348 if (ssb_appendaddr(&last->in6p_socket->so_rcv,
984263bc
MD
349 (struct sockaddr *)&udp_in6,
350 m, opts) == 0) {
351 udpstat.udps_fullsock++;
352 goto bad;
353 }
354 sorwakeup(last->in6p_socket);
355 return IPPROTO_DONE;
356 }
357 /*
358 * Locate pcb for datagram.
359 */
360 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport,
361 &ip6->ip6_dst, uh->uh_dport, 1,
362 m->m_pkthdr.rcvif);
bde3511a 363 if (in6p == NULL) {
984263bc
MD
364 if (log_in_vain) {
365 char buf[INET6_ADDRSTRLEN];
366
367 strcpy(buf, ip6_sprintf(&ip6->ip6_dst));
368 log(LOG_INFO,
369 "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
370 buf, ntohs(uh->uh_dport),
371 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport));
372 }
373 udpstat.udps_noport++;
374 if (m->m_flags & M_MCAST) {
a6ec04bc 375 kprintf("UDP6: M_MCAST is set in a unicast packet.\n");
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MD
376 udpstat.udps_noportmcast++;
377 goto bad;
378 }
379 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
380 return IPPROTO_DONE;
381 }
382#ifdef IPSEC
383 /*
384 * Check AH/ESP integrity.
385 */
386 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) {
387 ipsec6stat.in_polvio++;
388 goto bad;
389 }
390#endif /* IPSEC */
391#ifdef FAST_IPSEC
392 /*
393 * Check AH/ESP integrity.
394 */
395 if (ipsec6_in_reject(m, in6p)) {
396 goto bad;
397 }
398#endif /* FAST_IPSEC */
399
400 /*
401 * Construct sockaddr format source address.
402 * Stuff source address and datagram in user buffer.
403 */
404 init_sin6(&udp_in6, m); /* general init */
405 udp_in6.sin6_port = uh->uh_sport;
406 if (in6p->in6p_flags & IN6P_CONTROLOPTS
407 || in6p->in6p_socket->so_options & SO_TIMESTAMP)
408 ip6_savecontrol(in6p, &opts, ip6, m);
409 m_adj(m, off + sizeof(struct udphdr));
6d49aa6f 410 if (ssb_appendaddr(&in6p->in6p_socket->so_rcv,
984263bc
MD
411 (struct sockaddr *)&udp_in6,
412 m, opts) == 0) {
413 udpstat.udps_fullsock++;
414 goto bad;
415 }
416 sorwakeup(in6p->in6p_socket);
417 return IPPROTO_DONE;
418bad:
419 if (m)
420 m_freem(m);
421 if (opts)
422 m_freem(opts);
423 return IPPROTO_DONE;
424}
425
426void
122ebd49 427udp6_ctlinput(int cmd, struct sockaddr *sa, void *d)
984263bc
MD
428{
429 struct udphdr uh;
430 struct ip6_hdr *ip6;
431 struct mbuf *m;
432 int off = 0;
433 struct ip6ctlparam *ip6cp = NULL;
434 const struct sockaddr_in6 *sa6_src = NULL;
56d702cc 435 void (*notify) (struct inpcb *, int) = udp_notify;
984263bc
MD
436 struct udp_portonly {
437 u_int16_t uh_sport;
438 u_int16_t uh_dport;
439 } *uhp;
440
441 if (sa->sa_family != AF_INET6 ||
442 sa->sa_len != sizeof(struct sockaddr_in6))
443 return;
444
445 if ((unsigned)cmd >= PRC_NCMDS)
446 return;
447 if (PRC_IS_REDIRECT(cmd))
448 notify = in6_rtchange, d = NULL;
449 else if (cmd == PRC_HOSTDEAD)
450 d = NULL;
451 else if (inet6ctlerrmap[cmd] == 0)
452 return;
453
454 /* if the parameter is from icmp6, decode it. */
455 if (d != NULL) {
456 ip6cp = (struct ip6ctlparam *)d;
457 m = ip6cp->ip6c_m;
458 ip6 = ip6cp->ip6c_ip6;
459 off = ip6cp->ip6c_off;
460 sa6_src = ip6cp->ip6c_src;
461 } else {
462 m = NULL;
463 ip6 = NULL;
464 sa6_src = &sa6_any;
465 }
466
467 if (ip6) {
468 /*
469 * XXX: We assume that when IPV6 is non NULL,
470 * M and OFF are valid.
471 */
472
473 /* check if we can safely examine src and dst ports */
474 if (m->m_pkthdr.len < off + sizeof(*uhp))
475 return;
476
477 bzero(&uh, sizeof(uh));
478 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
479
7d448528
JH
480 in6_pcbnotify(&udbinfo.pcblisthead, sa, uh.uh_dport,
481 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport,
482 cmd, 0, notify);
984263bc 483 } else
7d448528
JH
484 in6_pcbnotify(&udbinfo.pcblisthead, sa, 0,
485 (const struct sockaddr *)sa6_src, 0,
486 cmd, 0, notify);
984263bc
MD
487}
488
489static int
490udp6_getcred(SYSCTL_HANDLER_ARGS)
491{
492 struct sockaddr_in6 addrs[2];
493 struct inpcb *inp;
abf782b3 494 int error;
984263bc 495
895c1f85 496 error = priv_check(req->td, PRIV_ROOT);
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MD
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);
abf782b3 507 crit_enter();
984263bc
MD
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:
abf782b3 520 crit_exit();
984263bc
MD
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
6cef7136
MD
528/*
529 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
530 * will sofree() it when we return.
531 */
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MD
532static int
533udp6_abort(struct socket *so)
534{
535 struct inpcb *inp;
6cef7136 536 int error;
984263bc 537
ed894f8c 538 inp = so->so_pcb;
6cef7136
MD
539 if (inp) {
540 soisdisconnected(so);
541 in6_pcbdetach(inp);
542 error = 0;
543 } else {
544 error = EINVAL;
545 }
546
547 return error;
984263bc
MD
548}
549
550static int
e4700d00 551udp6_attach(struct socket *so, int proto, struct pru_attach_info *ai)
984263bc
MD
552{
553 struct inpcb *inp;
abf782b3 554 int error;
984263bc 555
ed894f8c 556 inp = so->so_pcb;
bde3511a 557 if (inp != NULL)
984263bc
MD
558 return EINVAL;
559
6d49aa6f 560 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) {
e4700d00
JH
561 error = soreserve(so, udp_sendspace, udp_recvspace,
562 ai->sb_rlimit);
984263bc
MD
563 if (error)
564 return error;
565 }
abf782b3 566 crit_enter();
e4700d00 567 error = in_pcballoc(so, &udbinfo);
abf782b3 568 crit_exit();
984263bc
MD
569 if (error)
570 return error;
0ce0603e 571 sosetport(so, cpu_portfn(0));
984263bc
MD
572 inp = (struct inpcb *)so->so_pcb;
573 inp->inp_vflag |= INP_IPV6;
574 if (!ip6_v6only)
575 inp->inp_vflag |= INP_IPV4;
576 inp->in6p_hops = -1; /* use kernel default */
577 inp->in6p_cksum = -1; /* just to be sure */
578 /*
579 * XXX: ugly!!
580 * IPv4 TTL initialization is necessary for an IPv6 socket as well,
581 * because the socket may be bound to an IPv6 wildcard address,
582 * which may match an IPv4-mapped IPv6 address.
583 */
584 inp->inp_ip_ttl = ip_defttl;
585 return 0;
586}
587
588static int
dadab5e9 589udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
984263bc 590{
2322f6ca 591 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam;
984263bc 592 struct inpcb *inp;
abf782b3 593 int error;
984263bc 594
ed894f8c 595 inp = so->so_pcb;
bde3511a 596 if (inp == NULL)
984263bc
MD
597 return EINVAL;
598
599 inp->inp_vflag &= ~INP_IPV4;
600 inp->inp_vflag |= INP_IPV6;
bde3511a 601 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
984263bc
MD
602 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
603 inp->inp_vflag |= INP_IPV4;
604 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
605 struct sockaddr_in sin;
606
607 in6_sin6_2_sin(&sin, sin6_p);
608 inp->inp_vflag |= INP_IPV4;
609 inp->inp_vflag &= ~INP_IPV6;
abf782b3 610 crit_enter();
dadab5e9 611 error = in_pcbbind(inp, (struct sockaddr *)&sin, td);
abf782b3 612 crit_exit();
984263bc
MD
613 return error;
614 }
615 }
616
abf782b3 617 crit_enter();
dadab5e9 618 error = in6_pcbbind(inp, nam, td);
abf782b3 619 crit_exit();
f772087c
JH
620 if (error == 0) {
621 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
622 inp->inp_flags |= INP_WASBOUND_NOTANY;
623 in_pcbinswildcardhash(inp);
624 }
984263bc
MD
625 return error;
626}
627
628static int
dadab5e9 629udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
984263bc
MD
630{
631 struct inpcb *inp;
abf782b3 632 int error;
984263bc 633
ed894f8c 634 inp = so->so_pcb;
bde3511a 635 if (inp == NULL)
984263bc
MD
636 return EINVAL;
637
bde3511a 638 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
984263bc
MD
639 struct sockaddr_in6 *sin6_p;
640
641 sin6_p = (struct sockaddr_in6 *)nam;
642 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
643 struct sockaddr_in sin;
644
645 if (inp->inp_faddr.s_addr != INADDR_ANY)
646 return EISCONN;
647 in6_sin6_2_sin(&sin, sin6_p);
abf782b3 648 crit_enter();
dadab5e9 649 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td);
abf782b3 650 crit_exit();
984263bc
MD
651 if (error == 0) {
652 inp->inp_vflag |= INP_IPV4;
653 inp->inp_vflag &= ~INP_IPV6;
654 soisconnected(so);
655 }
656 return error;
657 }
658 }
659 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
660 return EISCONN;
2322f6ca
JH
661 if (inp->inp_flags & INP_WILDCARD)
662 in_pcbremwildcardhash(inp);
3e4150ef
VBD
663 if (!prison_remote_ip(td, nam))
664 return(EAFNOSUPPORT); /* IPv4 only jail */
abf782b3 665 crit_enter();
dadab5e9 666 error = in6_pcbconnect(inp, nam, td);
abf782b3 667 crit_exit();
984263bc
MD
668 if (error == 0) {
669 if (!ip6_v6only) { /* should be non mapped addr */
670 inp->inp_vflag &= ~INP_IPV4;
671 inp->inp_vflag |= INP_IPV6;
672 }
673 soisconnected(so);
2322f6ca
JH
674 } else if (error == EAFNOSUPPORT) { /* connection dissolved */
675 /*
676 * Follow traditional BSD behavior and retain
677 * the local port binding. But, fix the old misbehavior
678 * of overwriting any previously bound local address.
679 */
680 if (!(inp->inp_flags & INP_WASBOUND_NOTANY))
84204577 681 inp->in6p_laddr = kin6addr_any;
2322f6ca 682 in_pcbinswildcardhash(inp);
984263bc
MD
683 }
684 return error;
685}
686
687static int
688udp6_detach(struct socket *so)
689{
690 struct inpcb *inp;
984263bc 691
ed894f8c 692 inp = so->so_pcb;
bde3511a 693 if (inp == NULL)
984263bc 694 return EINVAL;
abf782b3 695 crit_enter();
984263bc 696 in6_pcbdetach(inp);
abf782b3 697 crit_exit();
984263bc
MD
698 return 0;
699}
700
701static int
702udp6_disconnect(struct socket *so)
703{
704 struct inpcb *inp;
984263bc 705
ed894f8c 706 inp = so->so_pcb;
bde3511a 707 if (inp == NULL)
984263bc
MD
708 return EINVAL;
709
710 if (inp->inp_vflag & INP_IPV4) {
68925b20 711 const struct pr_usrreqs *pru;
984263bc
MD
712
713 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
714 return ((*pru->pru_disconnect)(so));
715 }
716
717 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
718 return ENOTCONN;
719
abf782b3 720 crit_enter();
984263bc 721 in6_pcbdisconnect(inp);
abf782b3 722 crit_exit();
6cef7136 723 soclrstate(so, SS_ISCONNECTED); /* XXX */
984263bc
MD
724 return 0;
725}
726
727static int
728udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
dadab5e9 729 struct mbuf *control, struct thread *td)
984263bc
MD
730{
731 struct inpcb *inp;
732 int error = 0;
733
ed894f8c 734 inp = so->so_pcb;
bde3511a 735 if (inp == NULL) {
984263bc
MD
736 error = EINVAL;
737 goto bad;
738 }
739
740 if (addr) {
bde3511a 741 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
984263bc
MD
742 error = EINVAL;
743 goto bad;
744 }
745 if (addr->sa_family != AF_INET6) {
746 error = EAFNOSUPPORT;
747 goto bad;
748 }
749 }
750
751 if (!ip6_v6only) {
752 int hasv4addr;
753 struct sockaddr_in6 *sin6 = 0;
754
bde3511a 755 if (addr == NULL)
984263bc
MD
756 hasv4addr = (inp->inp_vflag & INP_IPV4);
757 else {
758 sin6 = (struct sockaddr_in6 *)addr;
759 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
760 ? 1 : 0;
761 }
762 if (hasv4addr) {
68925b20 763 const struct pr_usrreqs *pru;
984263bc
MD
764
765 if (sin6)
766 in6_sin6_2_sin_in_sock(addr);
767 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
ab1c1714
MD
768 error = ((*pru->pru_send)(so, flags, m, addr,
769 control, td));
984263bc
MD
770 /* addr will just be freed in sendit(). */
771 return error;
772 }
773 }
774
dadab5e9 775 return udp6_output(inp, m, addr, control, td);
984263bc 776
bde3511a 777bad:
984263bc 778 m_freem(m);
bde3511a 779 return (error);
984263bc
MD
780}
781
782struct pr_usrreqs udp6_usrreqs = {
fa5e758c
MD
783 .pru_abort = udp6_abort,
784 .pru_accept = pru_accept_notsupp,
785 .pru_attach = udp6_attach,
786 .pru_bind = udp6_bind,
787 .pru_connect = udp6_connect,
788 .pru_connect2 = pru_connect2_notsupp,
789 .pru_control = in6_control,
790 .pru_detach = udp6_detach,
791 .pru_disconnect = udp6_disconnect,
792 .pru_listen = pru_listen_notsupp,
793 .pru_peeraddr = in6_mapped_peeraddr,
794 .pru_rcvd = pru_rcvd_notsupp,
795 .pru_rcvoob = pru_rcvoob_notsupp,
796 .pru_send = udp6_send,
797 .pru_sense = pru_sense_null,
798 .pru_shutdown = udp_shutdown,
799 .pru_sockaddr = in6_mapped_sockaddr,
800 .pru_sosend = sosend,
8b5c39bb 801 .pru_soreceive = soreceive
984263bc 802};
fa5e758c 803