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[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>
002c1265 89#include <sys/msgport2.h>
984263bc
MD
90
91#include <net/if.h>
92#include <net/route.h>
93#include <net/if_types.h>
94
95#include <netinet/in.h>
96#include <netinet/in_systm.h>
97#include <netinet/ip.h>
98#include <netinet/in_pcb.h>
99#include <netinet/in_var.h>
100#include <netinet/ip_var.h>
101#include <netinet/udp.h>
102#include <netinet/udp_var.h>
103#include <netinet/ip6.h>
104#include <netinet6/ip6_var.h>
105#include <netinet6/in6_pcb.h>
106#include <netinet/icmp6.h>
107#include <netinet6/udp6_var.h>
108#include <netinet6/ip6protosw.h>
109
110#ifdef IPSEC
111#include <netinet6/ipsec.h>
112#include <netinet6/ipsec6.h>
113#endif /* IPSEC */
114
115#ifdef FAST_IPSEC
bf844ffa
JH
116#include <netproto/ipsec/ipsec.h>
117#include <netproto/ipsec/ipsec6.h>
984263bc
MD
118#endif /* FAST_IPSEC */
119
120/*
121 * UDP protocol inplementation.
122 * Per RFC 768, August, 1980.
123 */
124
125extern struct protosw inetsw[];
56d702cc 126static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *);
984263bc
MD
127
128static int
122ebd49 129in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp)
984263bc
MD
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)
984263bc
MD
150{
151 struct mbuf *m = *mp;
34ee9825
RG
152 struct ip6_hdr *ip6;
153 struct udphdr *uh;
154 struct inpcb *in6p;
984263bc
MD
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))
984263bc
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,
984263bc
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)
984263bc
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");
984263bc
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
002c1265 427udp6_ctlinput(netmsg_t msg)
984263bc 428{
002c1265
MD
429 int cmd = msg->ctlinput.nm_cmd;
430 struct sockaddr *sa = msg->ctlinput.nm_arg;
431 void *d = msg->ctlinput.nm_extra;
984263bc
MD
432 struct udphdr uh;
433 struct ip6_hdr *ip6;
434 struct mbuf *m;
435 int off = 0;
436 struct ip6ctlparam *ip6cp = NULL;
437 const struct sockaddr_in6 *sa6_src = NULL;
56d702cc 438 void (*notify) (struct inpcb *, int) = udp_notify;
984263bc
MD
439 struct udp_portonly {
440 u_int16_t uh_sport;
441 u_int16_t uh_dport;
442 } *uhp;
443
444 if (sa->sa_family != AF_INET6 ||
445 sa->sa_len != sizeof(struct sockaddr_in6))
002c1265 446 goto out;
984263bc
MD
447
448 if ((unsigned)cmd >= PRC_NCMDS)
002c1265 449 goto out;
984263bc
MD
450 if (PRC_IS_REDIRECT(cmd))
451 notify = in6_rtchange, d = NULL;
452 else if (cmd == PRC_HOSTDEAD)
453 d = NULL;
454 else if (inet6ctlerrmap[cmd] == 0)
002c1265 455 goto out;
984263bc
MD
456
457 /* if the parameter is from icmp6, decode it. */
458 if (d != NULL) {
459 ip6cp = (struct ip6ctlparam *)d;
460 m = ip6cp->ip6c_m;
461 ip6 = ip6cp->ip6c_ip6;
462 off = ip6cp->ip6c_off;
463 sa6_src = ip6cp->ip6c_src;
464 } else {
465 m = NULL;
466 ip6 = NULL;
467 sa6_src = &sa6_any;
468 }
469
470 if (ip6) {
471 /*
472 * XXX: We assume that when IPV6 is non NULL,
473 * M and OFF are valid.
474 */
475
476 /* check if we can safely examine src and dst ports */
477 if (m->m_pkthdr.len < off + sizeof(*uhp))
478 return;
479
480 bzero(&uh, sizeof(uh));
481 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
482
7d448528
JH
483 in6_pcbnotify(&udbinfo.pcblisthead, sa, uh.uh_dport,
484 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport,
485 cmd, 0, notify);
002c1265 486 } else {
7d448528
JH
487 in6_pcbnotify(&udbinfo.pcblisthead, sa, 0,
488 (const struct sockaddr *)sa6_src, 0,
489 cmd, 0, notify);
002c1265
MD
490 }
491out:
492 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
984263bc
MD
493}
494
495static int
496udp6_getcred(SYSCTL_HANDLER_ARGS)
497{
498 struct sockaddr_in6 addrs[2];
499 struct inpcb *inp;
abf782b3 500 int error;
984263bc 501
895c1f85 502 error = priv_check(req->td, PRIV_ROOT);
984263bc
MD
503 if (error)
504 return (error);
505
506 if (req->newlen != sizeof(addrs))
507 return (EINVAL);
508 if (req->oldlen != sizeof(struct ucred))
509 return (EINVAL);
510 error = SYSCTL_IN(req, addrs, sizeof(addrs));
511 if (error)
512 return (error);
abf782b3 513 crit_enter();
984263bc
MD
514 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr,
515 addrs[1].sin6_port,
516 &addrs[0].sin6_addr, addrs[0].sin6_port,
517 1, NULL);
518 if (!inp || !inp->inp_socket) {
519 error = ENOENT;
520 goto out;
521 }
522 error = SYSCTL_OUT(req, inp->inp_socket->so_cred,
523 sizeof(struct ucred));
524
525out:
abf782b3 526 crit_exit();
984263bc
MD
527 return (error);
528}
529
530SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
531 0, 0,
532 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection");
533
6cef7136
MD
534/*
535 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
536 * will sofree() it when we return.
537 */
002c1265
MD
538static void
539udp6_abort(netmsg_t msg)
984263bc 540{
002c1265 541 struct socket *so = msg->abort.base.nm_so;
984263bc 542 struct inpcb *inp;
6cef7136 543 int error;
984263bc 544
ed894f8c 545 inp = so->so_pcb;
6cef7136
MD
546 if (inp) {
547 soisdisconnected(so);
548 in6_pcbdetach(inp);
549 error = 0;
550 } else {
551 error = EINVAL;
552 }
002c1265 553 lwkt_replymsg(&msg->abort.base.lmsg, error);
984263bc
MD
554}
555
002c1265
MD
556static void
557udp6_attach(netmsg_t msg)
984263bc 558{
002c1265
MD
559 struct socket *so = msg->attach.base.nm_so;
560 struct pru_attach_info *ai = msg->attach.nm_ai;
984263bc 561 struct inpcb *inp;
abf782b3 562 int error;
984263bc 563
ed894f8c 564 inp = so->so_pcb;
002c1265
MD
565 if (inp != NULL) {
566 error = EINVAL;
567 goto out;
568 }
984263bc 569
6d49aa6f 570 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) {
e4700d00
JH
571 error = soreserve(so, udp_sendspace, udp_recvspace,
572 ai->sb_rlimit);
984263bc 573 if (error)
002c1265 574 goto out;
984263bc 575 }
abf782b3 576 crit_enter();
e4700d00 577 error = in_pcballoc(so, &udbinfo);
abf782b3 578 crit_exit();
984263bc 579 if (error)
002c1265 580 goto out;
0ce0603e 581 sosetport(so, cpu_portfn(0));
984263bc
MD
582 inp = (struct inpcb *)so->so_pcb;
583 inp->inp_vflag |= INP_IPV6;
584 if (!ip6_v6only)
585 inp->inp_vflag |= INP_IPV4;
586 inp->in6p_hops = -1; /* use kernel default */
587 inp->in6p_cksum = -1; /* just to be sure */
588 /*
589 * XXX: ugly!!
590 * IPv4 TTL initialization is necessary for an IPv6 socket as well,
591 * because the socket may be bound to an IPv6 wildcard address,
592 * which may match an IPv4-mapped IPv6 address.
593 */
594 inp->inp_ip_ttl = ip_defttl;
002c1265
MD
595 error = 0;
596out:
597 lwkt_replymsg(&msg->attach.base.lmsg, error);
984263bc
MD
598}
599
002c1265
MD
600static void
601udp6_bind(netmsg_t msg)
984263bc 602{
002c1265
MD
603 struct socket *so =msg->bind.base.nm_so;
604 struct sockaddr *nam = msg->bind.nm_nam;
605 struct thread *td = msg->bind.nm_td;
2322f6ca 606 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam;
984263bc 607 struct inpcb *inp;
abf782b3 608 int error;
984263bc 609
ed894f8c 610 inp = so->so_pcb;
002c1265
MD
611 if (inp == NULL) {
612 error = EINVAL;
613 goto out;
614 }
984263bc
MD
615
616 inp->inp_vflag &= ~INP_IPV4;
617 inp->inp_vflag |= INP_IPV6;
bde3511a 618 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
984263bc
MD
619 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
620 inp->inp_vflag |= INP_IPV4;
621 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
622 struct sockaddr_in sin;
623
624 in6_sin6_2_sin(&sin, sin6_p);
625 inp->inp_vflag |= INP_IPV4;
626 inp->inp_vflag &= ~INP_IPV6;
abf782b3 627 crit_enter();
dadab5e9 628 error = in_pcbbind(inp, (struct sockaddr *)&sin, td);
abf782b3 629 crit_exit();
002c1265 630 goto out;
984263bc
MD
631 }
632 }
633
abf782b3 634 crit_enter();
dadab5e9 635 error = in6_pcbbind(inp, nam, td);
abf782b3 636 crit_exit();
f772087c
JH
637 if (error == 0) {
638 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
639 inp->inp_flags |= INP_WASBOUND_NOTANY;
640 in_pcbinswildcardhash(inp);
641 }
002c1265
MD
642out:
643 lwkt_replymsg(&msg->bind.base.lmsg, error);
984263bc
MD
644}
645
002c1265
MD
646static void
647udp6_connect(netmsg_t msg)
984263bc 648{
002c1265
MD
649 struct socket *so = msg->connect.base.nm_so;
650 struct sockaddr *nam = msg->connect.nm_nam;
651 struct thread *td = msg->connect.nm_td;
984263bc 652 struct inpcb *inp;
abf782b3 653 int error;
984263bc 654
ed894f8c 655 inp = so->so_pcb;
002c1265
MD
656 if (inp == NULL) {
657 error = EINVAL;
658 goto out;
659 }
984263bc 660
bde3511a 661 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
984263bc
MD
662 struct sockaddr_in6 *sin6_p;
663
664 sin6_p = (struct sockaddr_in6 *)nam;
665 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
666 struct sockaddr_in sin;
667
002c1265
MD
668 if (inp->inp_faddr.s_addr != INADDR_ANY) {
669 error = EISCONN;
670 goto out;
671 }
984263bc 672 in6_sin6_2_sin(&sin, sin6_p);
abf782b3 673 crit_enter();
dadab5e9 674 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td);
abf782b3 675 crit_exit();
984263bc
MD
676 if (error == 0) {
677 inp->inp_vflag |= INP_IPV4;
678 inp->inp_vflag &= ~INP_IPV6;
679 soisconnected(so);
680 }
002c1265 681 goto out;
984263bc
MD
682 }
683 }
002c1265
MD
684 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
685 error = EISCONN;
686 goto out;
687 }
2322f6ca
JH
688 if (inp->inp_flags & INP_WILDCARD)
689 in_pcbremwildcardhash(inp);
002c1265
MD
690 if (!prison_remote_ip(td, nam)) {
691 error = EAFNOSUPPORT; /* IPv4 only jail */
692 goto out;
693 }
abf782b3 694 crit_enter();
dadab5e9 695 error = in6_pcbconnect(inp, nam, td);
abf782b3 696 crit_exit();
984263bc
MD
697 if (error == 0) {
698 if (!ip6_v6only) { /* should be non mapped addr */
699 inp->inp_vflag &= ~INP_IPV4;
700 inp->inp_vflag |= INP_IPV6;
701 }
702 soisconnected(so);
2322f6ca
JH
703 } else if (error == EAFNOSUPPORT) { /* connection dissolved */
704 /*
705 * Follow traditional BSD behavior and retain
706 * the local port binding. But, fix the old misbehavior
707 * of overwriting any previously bound local address.
708 */
709 if (!(inp->inp_flags & INP_WASBOUND_NOTANY))
84204577 710 inp->in6p_laddr = kin6addr_any;
2322f6ca 711 in_pcbinswildcardhash(inp);
984263bc 712 }
002c1265
MD
713out:
714 lwkt_replymsg(&msg->connect.base.lmsg, error);
984263bc
MD
715}
716
002c1265
MD
717static void
718udp6_detach(netmsg_t msg)
984263bc 719{
002c1265 720 struct socket *so = msg->detach.base.nm_so;
984263bc 721 struct inpcb *inp;
002c1265 722 int error;
984263bc 723
ed894f8c 724 inp = so->so_pcb;
002c1265
MD
725 if (inp) {
726 crit_enter();
727 in6_pcbdetach(inp);
728 crit_exit();
729 error = 0;
730 } else {
731 error = EINVAL;
732 }
733 lwkt_replymsg(&msg->detach.base.lmsg, error);
984263bc
MD
734}
735
002c1265
MD
736static void
737udp6_disconnect(netmsg_t msg)
984263bc 738{
002c1265 739 struct socket *so = msg->disconnect.base.nm_so;
984263bc 740 struct inpcb *inp;
002c1265 741 int error;
984263bc 742
ed894f8c 743 inp = so->so_pcb;
002c1265
MD
744 if (inp == NULL) {
745 error = EINVAL;
746 goto out;
747 }
984263bc
MD
748
749 if (inp->inp_vflag & INP_IPV4) {
68925b20 750 const struct pr_usrreqs *pru;
984263bc
MD
751
752 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
002c1265
MD
753 pru->pru_disconnect(msg); /* XXX on right port? */
754 return;
984263bc
MD
755 }
756
002c1265
MD
757 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
758 error = ENOTCONN;
759 } else {
760 crit_enter();
761 in6_pcbdisconnect(inp);
762 crit_exit();
763 soclrstate(so, SS_ISCONNECTED); /* XXX */
764 error = 0;
765 }
766out:
767 lwkt_replymsg(&msg->disconnect.base.lmsg, error);
984263bc
MD
768}
769
002c1265
MD
770static void
771udp6_send(netmsg_t msg)
984263bc 772{
002c1265
MD
773 struct socket *so = msg->send.base.nm_so;
774 struct mbuf *m = msg->send.nm_m;
775 struct sockaddr *addr = msg->send.nm_addr;
776 struct mbuf *control = msg->send.nm_control;
777 struct thread *td = msg->send.nm_td;
984263bc
MD
778 struct inpcb *inp;
779 int error = 0;
780
ed894f8c 781 inp = so->so_pcb;
bde3511a 782 if (inp == NULL) {
984263bc
MD
783 error = EINVAL;
784 goto bad;
785 }
786
787 if (addr) {
bde3511a 788 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
984263bc
MD
789 error = EINVAL;
790 goto bad;
791 }
792 if (addr->sa_family != AF_INET6) {
793 error = EAFNOSUPPORT;
794 goto bad;
795 }
796 }
797
798 if (!ip6_v6only) {
799 int hasv4addr;
800 struct sockaddr_in6 *sin6 = 0;
801
bde3511a 802 if (addr == NULL)
984263bc
MD
803 hasv4addr = (inp->inp_vflag & INP_IPV4);
804 else {
805 sin6 = (struct sockaddr_in6 *)addr;
806 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
807 ? 1 : 0;
808 }
809 if (hasv4addr) {
68925b20 810 const struct pr_usrreqs *pru;
984263bc
MD
811
812 if (sin6)
813 in6_sin6_2_sin_in_sock(addr);
814 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
002c1265
MD
815 pru->pru_send(msg);
816 /* msg invalid now */
817 return;
984263bc
MD
818 }
819 }
820
002c1265 821 error = udp6_output(inp, m, addr, control, td);
c14a35e9
MD
822 lwkt_replymsg(&msg->send.base.lmsg, error);
823 return;
bde3511a 824bad:
984263bc 825 m_freem(m);
002c1265 826 lwkt_replymsg(&msg->send.base.lmsg, error);
984263bc
MD
827}
828
829struct pr_usrreqs udp6_usrreqs = {
fa5e758c 830 .pru_abort = udp6_abort,
002c1265 831 .pru_accept = pr_generic_notsupp,
fa5e758c
MD
832 .pru_attach = udp6_attach,
833 .pru_bind = udp6_bind,
834 .pru_connect = udp6_connect,
002c1265
MD
835 .pru_connect2 = pr_generic_notsupp,
836 .pru_control = in6_control_dispatch,
fa5e758c
MD
837 .pru_detach = udp6_detach,
838 .pru_disconnect = udp6_disconnect,
002c1265
MD
839 .pru_listen = pr_generic_notsupp,
840 .pru_peeraddr = in6_mapped_peeraddr_dispatch,
841 .pru_rcvd = pr_generic_notsupp,
842 .pru_rcvoob = pr_generic_notsupp,
fa5e758c
MD
843 .pru_send = udp6_send,
844 .pru_sense = pru_sense_null,
845 .pru_shutdown = udp_shutdown,
002c1265 846 .pru_sockaddr = in6_mapped_sockaddr_dispatch,
fa5e758c 847 .pru_sosend = sosend,
8b5c39bb 848 .pru_soreceive = soreceive
984263bc 849};
fa5e758c 850