Remove spl*() in net/{altq,bpf.c,bridge,dummynet,ef,gif,gre,hostcache.c}
[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 $ */
7d448528 2/* $DragonFly: src/sys/netinet6/udp6_usrreq.c,v 1.19 2005/03/06 05:09:25 hsu 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>
85
86#include <net/if.h>
87#include <net/route.h>
88#include <net/if_types.h>
89
90#include <netinet/in.h>
91#include <netinet/in_systm.h>
92#include <netinet/ip.h>
93#include <netinet/in_pcb.h>
94#include <netinet/in_var.h>
95#include <netinet/ip_var.h>
96#include <netinet/udp.h>
97#include <netinet/udp_var.h>
98#include <netinet/ip6.h>
99#include <netinet6/ip6_var.h>
100#include <netinet6/in6_pcb.h>
101#include <netinet/icmp6.h>
102#include <netinet6/udp6_var.h>
103#include <netinet6/ip6protosw.h>
104
105#ifdef IPSEC
106#include <netinet6/ipsec.h>
107#include <netinet6/ipsec6.h>
108#endif /* IPSEC */
109
110#ifdef FAST_IPSEC
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111#include <netproto/ipsec/ipsec.h>
112#include <netproto/ipsec/ipsec6.h>
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113#endif /* FAST_IPSEC */
114
115/*
116 * UDP protocol inplementation.
117 * Per RFC 768, August, 1980.
118 */
119
120extern struct protosw inetsw[];
56d702cc
RG
121static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *);
122static int udp6_detach (struct socket *so);
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123
124static int
122ebd49 125in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp)
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MD
126{
127 struct ip6_moptions *im6o = in6p->in6p_moptions;
128 struct in6_multi_mship *imm;
129
130 if (im6o == NULL)
131 return 0;
132
133 for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
134 imm = imm->i6mm_chain.le_next) {
135 if ((ifp == NULL ||
136 imm->i6mm_maddr->in6m_ifp == ifp) &&
137 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
138 ia6))
139 return 1;
140 }
141 return 0;
142}
143
144int
dadab5e9 145udp6_input(struct mbuf **mp, int *offp, int proto)
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MD
146{
147 struct mbuf *m = *mp;
34ee9825
RG
148 struct ip6_hdr *ip6;
149 struct udphdr *uh;
150 struct inpcb *in6p;
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151 struct mbuf *opts = NULL;
152 int off = *offp;
153 int plen, ulen;
154 struct sockaddr_in6 udp_in6;
155
156 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
157
158 ip6 = mtod(m, struct ip6_hdr *);
159
160 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
161 /* XXX send icmp6 host/port unreach? */
162 m_freem(m);
163 return IPPROTO_DONE;
164 }
165
166 udpstat.udps_ipackets++;
167
168 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
169 uh = (struct udphdr *)((caddr_t)ip6 + off);
170 ulen = ntohs((u_short)uh->uh_ulen);
171
172 if (plen != ulen) {
173 udpstat.udps_badlen++;
174 goto bad;
175 }
176
177 /*
178 * Checksum extended UDP header and data.
179 */
180 if (uh->uh_sum == 0)
181 udpstat.udps_nosum++;
182 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
183 udpstat.udps_badsum++;
184 goto bad;
185 }
186
187 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
188 struct inpcb *last;
189
190 /*
191 * Deliver a multicast datagram to all sockets
192 * for which the local and remote addresses and ports match
193 * those of the incoming datagram. This allows more than
194 * one process to receive multicasts on the same port.
195 * (This really ought to be done for unicast datagrams as
196 * well, but that would cause problems with existing
197 * applications that open both address-specific sockets and
198 * a wildcard socket listening to the same port -- they would
199 * end up receiving duplicates of every unicast datagram.
200 * Those applications open the multiple sockets to overcome an
201 * inadequacy of the UDP socket interface, but for backwards
202 * compatibility we avoid the problem here rather than
203 * fixing the interface. Maybe 4.5BSD will remedy this?)
204 */
205
206 /*
207 * In a case that laddr should be set to the link-local
208 * address (this happens in RIPng), the multicast address
209 * specified in the received packet does not match with
210 * laddr. To cure this situation, the matching is relaxed
211 * if the receiving interface is the same as one specified
212 * in the socket and if the destination multicast address
213 * matches one of the multicast groups specified in the socket.
214 */
215
216 /*
217 * Construct sockaddr format source address.
218 */
219 init_sin6(&udp_in6, m); /* general init */
220 udp_in6.sin6_port = uh->uh_sport;
221 /*
222 * KAME note: traditionally we dropped udpiphdr from mbuf here.
223 * We need udphdr for IPsec processing so we do that later.
224 */
225
226 /*
227 * Locate pcb(s) for datagram.
228 * (Algorithm copied from raw_intr().)
229 */
230 last = NULL;
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231 LIST_FOREACH(in6p, &udbinfo.pcblisthead, inp_list) {
232 if ((in6p->inp_flags & INP_PLACEMARKER) == 0)
233 continue;
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234 if ((in6p->inp_vflag & INP_IPV6) == 0)
235 continue;
236 if (in6p->in6p_lport != uh->uh_dport)
237 continue;
238 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
239 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
240 &ip6->ip6_dst) &&
241 !in6_mcmatch(in6p, &ip6->ip6_dst,
242 m->m_pkthdr.rcvif))
243 continue;
244 }
245 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
246 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
247 &ip6->ip6_src) ||
248 in6p->in6p_fport != uh->uh_sport)
249 continue;
250 }
251
252 if (last != NULL) {
253 struct mbuf *n;
254
255#ifdef IPSEC
256 /*
257 * Check AH/ESP integrity.
258 */
259 if (ipsec6_in_reject_so(m, last->inp_socket))
260 ipsec6stat.in_polvio++;
261 /* do not inject data into pcb */
262 else
263#endif /* IPSEC */
264#ifdef FAST_IPSEC
265 /*
266 * Check AH/ESP integrity.
267 */
268 if (ipsec6_in_reject(m, last))
269 ;
270 else
271#endif /* FAST_IPSEC */
272 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
273 /*
274 * KAME NOTE: do not
275 * m_copy(m, offset, ...) above.
276 * sbappendaddr() expects M_PKTHDR,
277 * and m_copy() will copy M_PKTHDR
278 * only if offset is 0.
279 */
280 if (last->in6p_flags & IN6P_CONTROLOPTS
281 || last->in6p_socket->so_options & SO_TIMESTAMP)
282 ip6_savecontrol(last, &opts,
283 ip6, n);
284
285 m_adj(n, off + sizeof(struct udphdr));
286 if (sbappendaddr(&last->in6p_socket->so_rcv,
287 (struct sockaddr *)&udp_in6,
288 n, opts) == 0) {
289 m_freem(n);
290 if (opts)
291 m_freem(opts);
292 udpstat.udps_fullsock++;
293 } else
294 sorwakeup(last->in6p_socket);
295 opts = NULL;
296 }
297 }
298 last = in6p;
299 /*
300 * Don't look for additional matches if this one does
301 * not have either the SO_REUSEPORT or SO_REUSEADDR
302 * socket options set. This heuristic avoids searching
303 * through all pcbs in the common case of a non-shared
304 * port. It assumes that an application will never
305 * clear these options after setting them.
306 */
307 if ((last->in6p_socket->so_options &
308 (SO_REUSEPORT|SO_REUSEADDR)) == 0)
309 break;
310 }
311
312 if (last == NULL) {
313 /*
314 * No matching pcb found; discard datagram.
315 * (No need to send an ICMP Port Unreachable
316 * for a broadcast or multicast datgram.)
317 */
318 udpstat.udps_noport++;
319 udpstat.udps_noportmcast++;
320 goto bad;
321 }
322#ifdef IPSEC
323 /*
324 * Check AH/ESP integrity.
325 */
326 if (ipsec6_in_reject_so(m, last->inp_socket)) {
327 ipsec6stat.in_polvio++;
328 goto bad;
329 }
330#endif /* IPSEC */
331#ifdef FAST_IPSEC
332 /*
333 * Check AH/ESP integrity.
334 */
335 if (ipsec6_in_reject(m, last)) {
336 goto bad;
337 }
338#endif /* FAST_IPSEC */
339 if (last->in6p_flags & IN6P_CONTROLOPTS
340 || last->in6p_socket->so_options & SO_TIMESTAMP)
341 ip6_savecontrol(last, &opts, ip6, m);
342
343 m_adj(m, off + sizeof(struct udphdr));
344 if (sbappendaddr(&last->in6p_socket->so_rcv,
345 (struct sockaddr *)&udp_in6,
346 m, opts) == 0) {
347 udpstat.udps_fullsock++;
348 goto bad;
349 }
350 sorwakeup(last->in6p_socket);
351 return IPPROTO_DONE;
352 }
353 /*
354 * Locate pcb for datagram.
355 */
356 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport,
357 &ip6->ip6_dst, uh->uh_dport, 1,
358 m->m_pkthdr.rcvif);
359 if (in6p == 0) {
360 if (log_in_vain) {
361 char buf[INET6_ADDRSTRLEN];
362
363 strcpy(buf, ip6_sprintf(&ip6->ip6_dst));
364 log(LOG_INFO,
365 "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
366 buf, ntohs(uh->uh_dport),
367 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport));
368 }
369 udpstat.udps_noport++;
370 if (m->m_flags & M_MCAST) {
371 printf("UDP6: M_MCAST is set in a unicast packet.\n");
372 udpstat.udps_noportmcast++;
373 goto bad;
374 }
375 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
376 return IPPROTO_DONE;
377 }
378#ifdef IPSEC
379 /*
380 * Check AH/ESP integrity.
381 */
382 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) {
383 ipsec6stat.in_polvio++;
384 goto bad;
385 }
386#endif /* IPSEC */
387#ifdef FAST_IPSEC
388 /*
389 * Check AH/ESP integrity.
390 */
391 if (ipsec6_in_reject(m, in6p)) {
392 goto bad;
393 }
394#endif /* FAST_IPSEC */
395
396 /*
397 * Construct sockaddr format source address.
398 * Stuff source address and datagram in user buffer.
399 */
400 init_sin6(&udp_in6, m); /* general init */
401 udp_in6.sin6_port = uh->uh_sport;
402 if (in6p->in6p_flags & IN6P_CONTROLOPTS
403 || in6p->in6p_socket->so_options & SO_TIMESTAMP)
404 ip6_savecontrol(in6p, &opts, ip6, m);
405 m_adj(m, off + sizeof(struct udphdr));
406 if (sbappendaddr(&in6p->in6p_socket->so_rcv,
407 (struct sockaddr *)&udp_in6,
408 m, opts) == 0) {
409 udpstat.udps_fullsock++;
410 goto bad;
411 }
412 sorwakeup(in6p->in6p_socket);
413 return IPPROTO_DONE;
414bad:
415 if (m)
416 m_freem(m);
417 if (opts)
418 m_freem(opts);
419 return IPPROTO_DONE;
420}
421
422void
122ebd49 423udp6_ctlinput(int cmd, struct sockaddr *sa, void *d)
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MD
424{
425 struct udphdr uh;
426 struct ip6_hdr *ip6;
427 struct mbuf *m;
428 int off = 0;
429 struct ip6ctlparam *ip6cp = NULL;
430 const struct sockaddr_in6 *sa6_src = NULL;
56d702cc 431 void (*notify) (struct inpcb *, int) = udp_notify;
984263bc
MD
432 struct udp_portonly {
433 u_int16_t uh_sport;
434 u_int16_t uh_dport;
435 } *uhp;
436
437 if (sa->sa_family != AF_INET6 ||
438 sa->sa_len != sizeof(struct sockaddr_in6))
439 return;
440
441 if ((unsigned)cmd >= PRC_NCMDS)
442 return;
443 if (PRC_IS_REDIRECT(cmd))
444 notify = in6_rtchange, d = NULL;
445 else if (cmd == PRC_HOSTDEAD)
446 d = NULL;
447 else if (inet6ctlerrmap[cmd] == 0)
448 return;
449
450 /* if the parameter is from icmp6, decode it. */
451 if (d != NULL) {
452 ip6cp = (struct ip6ctlparam *)d;
453 m = ip6cp->ip6c_m;
454 ip6 = ip6cp->ip6c_ip6;
455 off = ip6cp->ip6c_off;
456 sa6_src = ip6cp->ip6c_src;
457 } else {
458 m = NULL;
459 ip6 = NULL;
460 sa6_src = &sa6_any;
461 }
462
463 if (ip6) {
464 /*
465 * XXX: We assume that when IPV6 is non NULL,
466 * M and OFF are valid.
467 */
468
469 /* check if we can safely examine src and dst ports */
470 if (m->m_pkthdr.len < off + sizeof(*uhp))
471 return;
472
473 bzero(&uh, sizeof(uh));
474 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
475
7d448528
JH
476 in6_pcbnotify(&udbinfo.pcblisthead, sa, uh.uh_dport,
477 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport,
478 cmd, 0, notify);
984263bc 479 } else
7d448528
JH
480 in6_pcbnotify(&udbinfo.pcblisthead, sa, 0,
481 (const struct sockaddr *)sa6_src, 0,
482 cmd, 0, notify);
984263bc
MD
483}
484
485static int
486udp6_getcred(SYSCTL_HANDLER_ARGS)
487{
488 struct sockaddr_in6 addrs[2];
489 struct inpcb *inp;
490 int error, s;
491
dadab5e9 492 error = suser(req->td);
984263bc
MD
493 if (error)
494 return (error);
495
496 if (req->newlen != sizeof(addrs))
497 return (EINVAL);
498 if (req->oldlen != sizeof(struct ucred))
499 return (EINVAL);
500 error = SYSCTL_IN(req, addrs, sizeof(addrs));
501 if (error)
502 return (error);
503 s = splnet();
504 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr,
505 addrs[1].sin6_port,
506 &addrs[0].sin6_addr, addrs[0].sin6_port,
507 1, NULL);
508 if (!inp || !inp->inp_socket) {
509 error = ENOENT;
510 goto out;
511 }
512 error = SYSCTL_OUT(req, inp->inp_socket->so_cred,
513 sizeof(struct ucred));
514
515out:
516 splx(s);
517 return (error);
518}
519
520SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
521 0, 0,
522 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection");
523
524static int
525udp6_abort(struct socket *so)
526{
527 struct inpcb *inp;
528 int s;
529
ed894f8c 530 inp = so->so_pcb;
984263bc
MD
531 if (inp == 0)
532 return EINVAL; /* ??? possible? panic instead? */
533 soisdisconnected(so);
534 s = splnet();
535 in6_pcbdetach(inp);
536 splx(s);
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;
544 int s, error;
545
ed894f8c 546 inp = so->so_pcb;
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MD
547 if (inp != 0)
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);
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MD
553 if (error)
554 return error;
555 }
556 s = splnet();
e4700d00 557 error = in_pcballoc(so, &udbinfo);
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MD
558 splx(s);
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;
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MD
581 struct inpcb *inp;
582 int s, error;
583
ed894f8c 584 inp = so->so_pcb;
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MD
585 if (inp == 0)
586 return EINVAL;
587
588 inp->inp_vflag &= ~INP_IPV4;
589 inp->inp_vflag |= INP_IPV6;
590 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
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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;
599 s = splnet();
dadab5e9 600 error = in_pcbbind(inp, (struct sockaddr *)&sin, td);
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MD
601 splx(s);
602 return error;
603 }
604 }
605
606 s = splnet();
dadab5e9 607 error = in6_pcbbind(inp, nam, td);
984263bc 608 splx(s);
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 }
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MD
614 return error;
615}
616
617static int
dadab5e9 618udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
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MD
619{
620 struct inpcb *inp;
621 int s, error;
622
ed894f8c 623 inp = so->so_pcb;
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MD
624 if (inp == 0)
625 return EINVAL;
626
627 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
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);
637 s = splnet();
dadab5e9 638 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td);
984263bc
MD
639 splx(s);
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);
984263bc 652 s = splnet();
dadab5e9 653 error = in6_pcbconnect(inp, nam, td);
984263bc
MD
654 splx(s);
655 if (error == 0) {
656 if (!ip6_v6only) { /* should be non mapped addr */
657 inp->inp_vflag &= ~INP_IPV4;
658 inp->inp_vflag |= INP_IPV6;
659 }
660 soisconnected(so);
2322f6ca
JH
661 } else if (error == EAFNOSUPPORT) { /* connection dissolved */
662 /*
663 * Follow traditional BSD behavior and retain
664 * the local port binding. But, fix the old misbehavior
665 * of overwriting any previously bound local address.
666 */
667 if (!(inp->inp_flags & INP_WASBOUND_NOTANY))
668 inp->in6p_laddr = in6addr_any;
669 in_pcbinswildcardhash(inp);
984263bc
MD
670 }
671 return error;
672}
673
674static int
675udp6_detach(struct socket *so)
676{
677 struct inpcb *inp;
678 int s;
679
ed894f8c 680 inp = so->so_pcb;
984263bc
MD
681 if (inp == 0)
682 return EINVAL;
683 s = splnet();
684 in6_pcbdetach(inp);
685 splx(s);
686 return 0;
687}
688
689static int
690udp6_disconnect(struct socket *so)
691{
692 struct inpcb *inp;
693 int s;
694
ed894f8c 695 inp = so->so_pcb;
984263bc
MD
696 if (inp == 0)
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
709 s = splnet();
710 in6_pcbdisconnect(inp);
984263bc
MD
711 splx(s);
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;
984263bc
MD
724 if (inp == 0) {
725 error = EINVAL;
726 goto bad;
727 }
728
729 if (addr) {
730 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
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
744 if (addr == 0)
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
MD
765
766 bad:
767 m_freem(m);
768 return(error);
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};