hammer(8): Fix closing brace indent in 'show' output.
[dragonfly.git] / sys / netinet6 / udp6_usrreq.c
CommitLineData
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1/* $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.13 2003/01/24 05:11:35 sam Exp $ */
2/* $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ */
3
4/*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33/*
34 * Copyright (c) 1982, 1986, 1989, 1993
35 * The Regents of the University of California. All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
dc71b7ab 45 * 3. Neither the name of the University nor the names of its contributors
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46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 *
61 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
62 */
63
64#include "opt_inet.h"
65#include "opt_inet6.h"
66#include "opt_ipsec.h"
67
68#include <sys/param.h>
69#include <sys/kernel.h>
70#include <sys/mbuf.h>
71#include <sys/protosw.h>
72#include <sys/socket.h>
73#include <sys/socketvar.h>
74#include <sys/sysctl.h>
75#include <sys/errno.h>
76#include <sys/stat.h>
77#include <sys/systm.h>
78#include <sys/syslog.h>
79#include <sys/proc.h>
895c1f85 80#include <sys/priv.h>
6cef7136 81
abf782b3 82#include <sys/thread2.h>
6cef7136 83#include <sys/socketvar2.h>
002c1265 84#include <sys/msgport2.h>
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85
86#include <net/if.h>
87#include <net/route.h>
88#include <net/if_types.h>
5337421c 89#include <net/netisr2.h>
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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
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112#include <netproto/ipsec/ipsec.h>
113#include <netproto/ipsec/ipsec6.h>
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114#endif /* FAST_IPSEC */
115
116/*
117 * UDP protocol inplementation.
118 * Per RFC 768, August, 1980.
119 */
120
121extern struct protosw inetsw[];
56d702cc 122static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *);
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123
124static int
122ebd49 125in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp)
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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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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;
e475836d 155 struct socket *so;
be4519a2 156 struct inpcbinfo *pcbinfo = &udbinfo[0];
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157
158 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
159
160 ip6 = mtod(m, struct ip6_hdr *);
161
162 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
163 /* XXX send icmp6 host/port unreach? */
164 m_freem(m);
165 return IPPROTO_DONE;
166 }
167
6e78e7fe 168 udp_stat.udps_ipackets++;
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169
170 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
171 uh = (struct udphdr *)((caddr_t)ip6 + off);
172 ulen = ntohs((u_short)uh->uh_ulen);
173
174 if (plen != ulen) {
6e78e7fe 175 udp_stat.udps_badlen++;
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176 goto bad;
177 }
178
179 /*
180 * Checksum extended UDP header and data.
181 */
182 if (uh->uh_sum == 0)
6e78e7fe 183 udp_stat.udps_nosum++;
984263bc 184 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
6e78e7fe 185 udp_stat.udps_badsum++;
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186 goto bad;
187 }
188
189 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
be4519a2 190 struct inpcb *last, *marker;
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191
192 /*
193 * Deliver a multicast datagram to all sockets
194 * for which the local and remote addresses and ports match
195 * those of the incoming datagram. This allows more than
196 * one process to receive multicasts on the same port.
197 * (This really ought to be done for unicast datagrams as
198 * well, but that would cause problems with existing
199 * applications that open both address-specific sockets and
200 * a wildcard socket listening to the same port -- they would
201 * end up receiving duplicates of every unicast datagram.
202 * Those applications open the multiple sockets to overcome an
203 * inadequacy of the UDP socket interface, but for backwards
204 * compatibility we avoid the problem here rather than
205 * fixing the interface. Maybe 4.5BSD will remedy this?)
206 */
207
208 /*
209 * In a case that laddr should be set to the link-local
210 * address (this happens in RIPng), the multicast address
211 * specified in the received packet does not match with
212 * laddr. To cure this situation, the matching is relaxed
213 * if the receiving interface is the same as one specified
214 * in the socket and if the destination multicast address
215 * matches one of the multicast groups specified in the socket.
216 */
217
218 /*
219 * Construct sockaddr format source address.
220 */
221 init_sin6(&udp_in6, m); /* general init */
222 udp_in6.sin6_port = uh->uh_sport;
223 /*
224 * KAME note: traditionally we dropped udpiphdr from mbuf here.
225 * We need udphdr for IPsec processing so we do that later.
226 */
227
228 /*
229 * Locate pcb(s) for datagram.
230 * (Algorithm copied from raw_intr().)
231 */
232 last = NULL;
5a38e392 233
be4519a2
SZ
234 marker = in_pcbmarker(mycpuid);
235
236 GET_PCBINFO_TOKEN(pcbinfo);
237
238 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
239 while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) {
240 LIST_REMOVE(marker, inp_list);
241 LIST_INSERT_AFTER(in6p, marker, inp_list);
242
243 if (in6p->inp_flags & INP_PLACEMARKER)
244 continue;
bde3511a 245 if (!(in6p->inp_vflag & INP_IPV6))
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246 continue;
247 if (in6p->in6p_lport != uh->uh_dport)
248 continue;
249 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
250 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
251 &ip6->ip6_dst) &&
252 !in6_mcmatch(in6p, &ip6->ip6_dst,
253 m->m_pkthdr.rcvif))
254 continue;
255 }
256 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
257 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
258 &ip6->ip6_src) ||
259 in6p->in6p_fport != uh->uh_sport)
260 continue;
261 }
262
263 if (last != NULL) {
e475836d 264 struct mbuf *n;
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265
266#ifdef IPSEC
267 /*
268 * Check AH/ESP integrity.
269 */
270 if (ipsec6_in_reject_so(m, last->inp_socket))
271 ipsec6stat.in_polvio++;
272 /* do not inject data into pcb */
273 else
274#endif /* IPSEC */
275#ifdef FAST_IPSEC
276 /*
277 * Check AH/ESP integrity.
278 */
279 if (ipsec6_in_reject(m, last))
280 ;
281 else
282#endif /* FAST_IPSEC */
283 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
284 /*
285 * KAME NOTE: do not
286 * m_copy(m, offset, ...) above.
6d49aa6f 287 * ssb_appendaddr() expects M_PKTHDR,
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288 * and m_copy() will copy M_PKTHDR
289 * only if offset is 0.
290 */
e475836d
MD
291 so = last->in6p_socket;
292 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
293 (so->so_options & SO_TIMESTAMP)) {
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MD
294 ip6_savecontrol(last, &opts,
295 ip6, n);
e475836d 296 }
984263bc 297 m_adj(n, off + sizeof(struct udphdr));
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MD
298 lwkt_gettoken(&so->so_rcv.ssb_token);
299 if (ssb_appendaddr(&so->so_rcv,
300 (struct sockaddr *)&udp_in6,
301 n, opts) == 0) {
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302 m_freem(n);
303 if (opts)
304 m_freem(opts);
6e78e7fe 305 udp_stat.udps_fullsock++;
e475836d
MD
306 } else {
307 sorwakeup(so);
308 }
309 lwkt_reltoken(&so->so_rcv.ssb_token);
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310 opts = NULL;
311 }
312 }
313 last = in6p;
314 /*
315 * Don't look for additional matches if this one does
316 * not have either the SO_REUSEPORT or SO_REUSEADDR
317 * socket options set. This heuristic avoids searching
318 * through all pcbs in the common case of a non-shared
319 * port. It assumes that an application will never
320 * clear these options after setting them.
321 */
322 if ((last->in6p_socket->so_options &
bde3511a 323 (SO_REUSEPORT | SO_REUSEADDR)) == 0)
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MD
324 break;
325 }
be4519a2
SZ
326 LIST_REMOVE(marker, inp_list);
327
328 REL_PCBINFO_TOKEN(pcbinfo);
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329
330 if (last == NULL) {
331 /*
332 * No matching pcb found; discard datagram.
333 * (No need to send an ICMP Port Unreachable
334 * for a broadcast or multicast datgram.)
335 */
6e78e7fe
SZ
336 udp_stat.udps_noport++;
337 udp_stat.udps_noportmcast++;
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338 goto bad;
339 }
340#ifdef IPSEC
341 /*
342 * Check AH/ESP integrity.
343 */
344 if (ipsec6_in_reject_so(m, last->inp_socket)) {
345 ipsec6stat.in_polvio++;
346 goto bad;
347 }
348#endif /* IPSEC */
349#ifdef FAST_IPSEC
350 /*
351 * Check AH/ESP integrity.
352 */
353 if (ipsec6_in_reject(m, last)) {
354 goto bad;
355 }
356#endif /* FAST_IPSEC */
357 if (last->in6p_flags & IN6P_CONTROLOPTS
358 || last->in6p_socket->so_options & SO_TIMESTAMP)
359 ip6_savecontrol(last, &opts, ip6, m);
360
361 m_adj(m, off + sizeof(struct udphdr));
e475836d
MD
362 so = last->in6p_socket;
363 lwkt_gettoken(&so->so_rcv.ssb_token);
364 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6,
365 m, opts) == 0) {
6e78e7fe 366 udp_stat.udps_fullsock++;
e475836d 367 lwkt_reltoken(&so->so_rcv.ssb_token);
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MD
368 goto bad;
369 }
e475836d
MD
370 sorwakeup(so);
371 lwkt_reltoken(&so->so_rcv.ssb_token);
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MD
372 return IPPROTO_DONE;
373 }
374 /*
375 * Locate pcb for datagram.
376 */
be4519a2 377 in6p = in6_pcblookup_hash(pcbinfo, &ip6->ip6_src, uh->uh_sport,
984263bc
MD
378 &ip6->ip6_dst, uh->uh_dport, 1,
379 m->m_pkthdr.rcvif);
bde3511a 380 if (in6p == NULL) {
984263bc
MD
381 if (log_in_vain) {
382 char buf[INET6_ADDRSTRLEN];
383
384 strcpy(buf, ip6_sprintf(&ip6->ip6_dst));
385 log(LOG_INFO,
386 "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
387 buf, ntohs(uh->uh_dport),
388 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport));
389 }
6e78e7fe 390 udp_stat.udps_noport++;
984263bc 391 if (m->m_flags & M_MCAST) {
a6ec04bc 392 kprintf("UDP6: M_MCAST is set in a unicast packet.\n");
6e78e7fe 393 udp_stat.udps_noportmcast++;
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MD
394 goto bad;
395 }
396 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
397 return IPPROTO_DONE;
398 }
399#ifdef IPSEC
400 /*
401 * Check AH/ESP integrity.
402 */
403 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) {
404 ipsec6stat.in_polvio++;
405 goto bad;
406 }
407#endif /* IPSEC */
408#ifdef FAST_IPSEC
409 /*
410 * Check AH/ESP integrity.
411 */
412 if (ipsec6_in_reject(m, in6p)) {
413 goto bad;
414 }
415#endif /* FAST_IPSEC */
416
417 /*
418 * Construct sockaddr format source address.
419 * Stuff source address and datagram in user buffer.
420 */
421 init_sin6(&udp_in6, m); /* general init */
422 udp_in6.sin6_port = uh->uh_sport;
423 if (in6p->in6p_flags & IN6P_CONTROLOPTS
424 || in6p->in6p_socket->so_options & SO_TIMESTAMP)
425 ip6_savecontrol(in6p, &opts, ip6, m);
426 m_adj(m, off + sizeof(struct udphdr));
e475836d
MD
427 so = in6p->in6p_socket;
428 lwkt_gettoken(&so->so_rcv.ssb_token);
429 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6,
430 m, opts) == 0) {
6e78e7fe 431 udp_stat.udps_fullsock++;
e475836d 432 lwkt_reltoken(&so->so_rcv.ssb_token);
984263bc
MD
433 goto bad;
434 }
e475836d
MD
435 sorwakeup(so);
436 lwkt_reltoken(&so->so_rcv.ssb_token);
984263bc
MD
437 return IPPROTO_DONE;
438bad:
439 if (m)
440 m_freem(m);
441 if (opts)
442 m_freem(opts);
443 return IPPROTO_DONE;
444}
445
446void
002c1265 447udp6_ctlinput(netmsg_t msg)
984263bc 448{
002c1265
MD
449 int cmd = msg->ctlinput.nm_cmd;
450 struct sockaddr *sa = msg->ctlinput.nm_arg;
451 void *d = msg->ctlinput.nm_extra;
984263bc
MD
452 struct udphdr uh;
453 struct ip6_hdr *ip6;
454 struct mbuf *m;
455 int off = 0;
456 struct ip6ctlparam *ip6cp = NULL;
457 const struct sockaddr_in6 *sa6_src = NULL;
7195d381 458 inp_notify_t notify = udp_notify;
984263bc
MD
459 struct udp_portonly {
460 u_int16_t uh_sport;
461 u_int16_t uh_dport;
462 } *uhp;
463
464 if (sa->sa_family != AF_INET6 ||
465 sa->sa_len != sizeof(struct sockaddr_in6))
002c1265 466 goto out;
984263bc
MD
467
468 if ((unsigned)cmd >= PRC_NCMDS)
002c1265 469 goto out;
984263bc
MD
470 if (PRC_IS_REDIRECT(cmd))
471 notify = in6_rtchange, d = NULL;
472 else if (cmd == PRC_HOSTDEAD)
473 d = NULL;
474 else if (inet6ctlerrmap[cmd] == 0)
002c1265 475 goto out;
984263bc
MD
476
477 /* if the parameter is from icmp6, decode it. */
478 if (d != NULL) {
479 ip6cp = (struct ip6ctlparam *)d;
480 m = ip6cp->ip6c_m;
481 ip6 = ip6cp->ip6c_ip6;
482 off = ip6cp->ip6c_off;
483 sa6_src = ip6cp->ip6c_src;
484 } else {
485 m = NULL;
486 ip6 = NULL;
487 sa6_src = &sa6_any;
488 }
489
490 if (ip6) {
491 /*
492 * XXX: We assume that when IPV6 is non NULL,
493 * M and OFF are valid.
494 */
495
496 /* check if we can safely examine src and dst ports */
497 if (m->m_pkthdr.len < off + sizeof(*uhp))
498 return;
499
500 bzero(&uh, sizeof(uh));
501 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
502
be4519a2 503 in6_pcbnotify(&udbinfo[0], sa, uh.uh_dport,
7d448528
JH
504 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport,
505 cmd, 0, notify);
002c1265 506 } else {
be4519a2 507 in6_pcbnotify(&udbinfo[0], sa, 0,
7d448528
JH
508 (const struct sockaddr *)sa6_src, 0,
509 cmd, 0, notify);
002c1265
MD
510 }
511out:
512 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
984263bc
MD
513}
514
515static int
516udp6_getcred(SYSCTL_HANDLER_ARGS)
517{
518 struct sockaddr_in6 addrs[2];
519 struct inpcb *inp;
abf782b3 520 int error;
984263bc 521
895c1f85 522 error = priv_check(req->td, PRIV_ROOT);
984263bc
MD
523 if (error)
524 return (error);
525
526 if (req->newlen != sizeof(addrs))
527 return (EINVAL);
528 if (req->oldlen != sizeof(struct ucred))
529 return (EINVAL);
530 error = SYSCTL_IN(req, addrs, sizeof(addrs));
531 if (error)
532 return (error);
abf782b3 533 crit_enter();
be4519a2 534 inp = in6_pcblookup_hash(&udbinfo[0], &addrs[1].sin6_addr,
984263bc
MD
535 addrs[1].sin6_port,
536 &addrs[0].sin6_addr, addrs[0].sin6_port,
537 1, NULL);
538 if (!inp || !inp->inp_socket) {
539 error = ENOENT;
540 goto out;
541 }
542 error = SYSCTL_OUT(req, inp->inp_socket->so_cred,
543 sizeof(struct ucred));
544
545out:
abf782b3 546 crit_exit();
984263bc
MD
547 return (error);
548}
549
550SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
551 0, 0,
552 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection");
553
6cef7136
MD
554/*
555 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
556 * will sofree() it when we return.
557 */
002c1265
MD
558static void
559udp6_abort(netmsg_t msg)
984263bc 560{
002c1265 561 struct socket *so = msg->abort.base.nm_so;
984263bc 562 struct inpcb *inp;
6cef7136 563 int error;
984263bc 564
ed894f8c 565 inp = so->so_pcb;
6cef7136
MD
566 if (inp) {
567 soisdisconnected(so);
aad1f734 568
6cef7136
MD
569 in6_pcbdetach(inp);
570 error = 0;
571 } else {
572 error = EINVAL;
573 }
002c1265 574 lwkt_replymsg(&msg->abort.base.lmsg, error);
984263bc
MD
575}
576
002c1265
MD
577static void
578udp6_attach(netmsg_t msg)
984263bc 579{
002c1265
MD
580 struct socket *so = msg->attach.base.nm_so;
581 struct pru_attach_info *ai = msg->attach.nm_ai;
984263bc 582 struct inpcb *inp;
abf782b3 583 int error;
984263bc 584
ed894f8c 585 inp = so->so_pcb;
002c1265
MD
586 if (inp != NULL) {
587 error = EINVAL;
588 goto out;
589 }
984263bc 590
6d49aa6f 591 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) {
e4700d00
JH
592 error = soreserve(so, udp_sendspace, udp_recvspace,
593 ai->sb_rlimit);
984263bc 594 if (error)
002c1265 595 goto out;
984263bc 596 }
aad1f734 597
be4519a2 598 error = in_pcballoc(so, &udbinfo[0]);
984263bc 599 if (error)
002c1265 600 goto out;
aad1f734 601
984263bc
MD
602 inp = (struct inpcb *)so->so_pcb;
603 inp->inp_vflag |= INP_IPV6;
984263bc
MD
604 inp->in6p_hops = -1; /* use kernel default */
605 inp->in6p_cksum = -1; /* just to be sure */
606 /*
607 * XXX: ugly!!
608 * IPv4 TTL initialization is necessary for an IPv6 socket as well,
609 * because the socket may be bound to an IPv6 wildcard address,
610 * which may match an IPv4-mapped IPv6 address.
611 */
612 inp->inp_ip_ttl = ip_defttl;
002c1265
MD
613 error = 0;
614out:
615 lwkt_replymsg(&msg->attach.base.lmsg, error);
984263bc
MD
616}
617
002c1265
MD
618static void
619udp6_bind(netmsg_t msg)
984263bc 620{
002c1265
MD
621 struct socket *so =msg->bind.base.nm_so;
622 struct sockaddr *nam = msg->bind.nm_nam;
623 struct thread *td = msg->bind.nm_td;
2322f6ca 624 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam;
984263bc 625 struct inpcb *inp;
abf782b3 626 int error;
984263bc 627
ed894f8c 628 inp = so->so_pcb;
002c1265
MD
629 if (inp == NULL) {
630 error = EINVAL;
631 goto out;
632 }
984263bc
MD
633
634 inp->inp_vflag &= ~INP_IPV4;
635 inp->inp_vflag |= INP_IPV6;
bde3511a 636 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
984263bc
MD
637 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
638 inp->inp_vflag |= INP_IPV4;
639 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
640 struct sockaddr_in sin;
641
642 in6_sin6_2_sin(&sin, sin6_p);
643 inp->inp_vflag |= INP_IPV4;
644 inp->inp_vflag &= ~INP_IPV6;
abf782b3 645 crit_enter();
dadab5e9 646 error = in_pcbbind(inp, (struct sockaddr *)&sin, td);
abf782b3 647 crit_exit();
002c1265 648 goto out;
984263bc
MD
649 }
650 }
651
abf782b3 652 crit_enter();
dadab5e9 653 error = in6_pcbbind(inp, nam, td);
abf782b3 654 crit_exit();
f772087c
JH
655 if (error == 0) {
656 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
657 inp->inp_flags |= INP_WASBOUND_NOTANY;
658 in_pcbinswildcardhash(inp);
659 }
002c1265
MD
660out:
661 lwkt_replymsg(&msg->bind.base.lmsg, error);
984263bc
MD
662}
663
002c1265
MD
664static void
665udp6_connect(netmsg_t msg)
984263bc 666{
002c1265
MD
667 struct socket *so = msg->connect.base.nm_so;
668 struct sockaddr *nam = msg->connect.nm_nam;
669 struct thread *td = msg->connect.nm_td;
984263bc 670 struct inpcb *inp;
abf782b3 671 int error;
984263bc 672
ed894f8c 673 inp = so->so_pcb;
002c1265
MD
674 if (inp == NULL) {
675 error = EINVAL;
676 goto out;
677 }
984263bc 678
bde3511a 679 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
984263bc
MD
680 struct sockaddr_in6 *sin6_p;
681
682 sin6_p = (struct sockaddr_in6 *)nam;
683 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
684 struct sockaddr_in sin;
685
002c1265
MD
686 if (inp->inp_faddr.s_addr != INADDR_ANY) {
687 error = EISCONN;
688 goto out;
689 }
984263bc 690 in6_sin6_2_sin(&sin, sin6_p);
abf782b3 691 crit_enter();
95390190
SZ
692 if (inp->inp_flags & INP_WILDCARD)
693 in_pcbremwildcardhash(inp);
dadab5e9 694 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td);
abf782b3 695 crit_exit();
984263bc
MD
696 if (error == 0) {
697 inp->inp_vflag |= INP_IPV4;
698 inp->inp_vflag &= ~INP_IPV6;
699 soisconnected(so);
700 }
002c1265 701 goto out;
984263bc
MD
702 }
703 }
002c1265
MD
704 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
705 error = EISCONN;
706 goto out;
707 }
2322f6ca
JH
708 if (inp->inp_flags & INP_WILDCARD)
709 in_pcbremwildcardhash(inp);
002c1265
MD
710 if (!prison_remote_ip(td, nam)) {
711 error = EAFNOSUPPORT; /* IPv4 only jail */
712 goto out;
713 }
abf782b3 714 crit_enter();
dadab5e9 715 error = in6_pcbconnect(inp, nam, td);
abf782b3 716 crit_exit();
984263bc 717 if (error == 0) {
984263bc 718 soisconnected(so);
2322f6ca
JH
719 } else if (error == EAFNOSUPPORT) { /* connection dissolved */
720 /*
721 * Follow traditional BSD behavior and retain
722 * the local port binding. But, fix the old misbehavior
723 * of overwriting any previously bound local address.
724 */
725 if (!(inp->inp_flags & INP_WASBOUND_NOTANY))
84204577 726 inp->in6p_laddr = kin6addr_any;
2322f6ca 727 in_pcbinswildcardhash(inp);
984263bc 728 }
002c1265
MD
729out:
730 lwkt_replymsg(&msg->connect.base.lmsg, error);
984263bc
MD
731}
732
002c1265
MD
733static void
734udp6_detach(netmsg_t msg)
984263bc 735{
002c1265 736 struct socket *so = msg->detach.base.nm_so;
984263bc 737 struct inpcb *inp;
002c1265 738 int error;
984263bc 739
ed894f8c 740 inp = so->so_pcb;
002c1265 741 if (inp) {
002c1265 742 in6_pcbdetach(inp);
002c1265
MD
743 error = 0;
744 } else {
745 error = EINVAL;
746 }
747 lwkt_replymsg(&msg->detach.base.lmsg, error);
984263bc
MD
748}
749
002c1265
MD
750static void
751udp6_disconnect(netmsg_t msg)
984263bc 752{
002c1265 753 struct socket *so = msg->disconnect.base.nm_so;
984263bc 754 struct inpcb *inp;
002c1265 755 int error;
984263bc 756
ed894f8c 757 inp = so->so_pcb;
002c1265
MD
758 if (inp == NULL) {
759 error = EINVAL;
760 goto out;
761 }
984263bc
MD
762
763 if (inp->inp_vflag & INP_IPV4) {
68925b20 764 const struct pr_usrreqs *pru;
984263bc
MD
765
766 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
002c1265
MD
767 pru->pru_disconnect(msg); /* XXX on right port? */
768 return;
984263bc
MD
769 }
770
002c1265
MD
771 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
772 error = ENOTCONN;
773 } else {
002c1265 774 in6_pcbdisconnect(inp);
002c1265
MD
775 soclrstate(so, SS_ISCONNECTED); /* XXX */
776 error = 0;
777 }
778out:
779 lwkt_replymsg(&msg->disconnect.base.lmsg, error);
984263bc
MD
780}
781
002c1265
MD
782static void
783udp6_send(netmsg_t msg)
984263bc 784{
002c1265
MD
785 struct socket *so = msg->send.base.nm_so;
786 struct mbuf *m = msg->send.nm_m;
787 struct sockaddr *addr = msg->send.nm_addr;
788 struct mbuf *control = msg->send.nm_control;
789 struct thread *td = msg->send.nm_td;
984263bc
MD
790 struct inpcb *inp;
791 int error = 0;
792
ed894f8c 793 inp = so->so_pcb;
bde3511a 794 if (inp == NULL) {
984263bc
MD
795 error = EINVAL;
796 goto bad;
797 }
798
799 if (addr) {
bde3511a 800 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
984263bc
MD
801 error = EINVAL;
802 goto bad;
803 }
804 if (addr->sa_family != AF_INET6) {
805 error = EAFNOSUPPORT;
806 goto bad;
807 }
808 }
809
002c1265 810 error = udp6_output(inp, m, addr, control, td);
c14a35e9
MD
811 lwkt_replymsg(&msg->send.base.lmsg, error);
812 return;
bde3511a 813bad:
984263bc 814 m_freem(m);
002c1265 815 lwkt_replymsg(&msg->send.base.lmsg, error);
984263bc
MD
816}
817
818struct pr_usrreqs udp6_usrreqs = {
fa5e758c 819 .pru_abort = udp6_abort,
002c1265 820 .pru_accept = pr_generic_notsupp,
fa5e758c
MD
821 .pru_attach = udp6_attach,
822 .pru_bind = udp6_bind,
823 .pru_connect = udp6_connect,
002c1265
MD
824 .pru_connect2 = pr_generic_notsupp,
825 .pru_control = in6_control_dispatch,
fa5e758c
MD
826 .pru_detach = udp6_detach,
827 .pru_disconnect = udp6_disconnect,
002c1265
MD
828 .pru_listen = pr_generic_notsupp,
829 .pru_peeraddr = in6_mapped_peeraddr_dispatch,
830 .pru_rcvd = pr_generic_notsupp,
831 .pru_rcvoob = pr_generic_notsupp,
fa5e758c
MD
832 .pru_send = udp6_send,
833 .pru_sense = pru_sense_null,
834 .pru_shutdown = udp_shutdown,
002c1265 835 .pru_sockaddr = in6_mapped_sockaddr_dispatch,
fa5e758c 836 .pru_sosend = sosend,
8b5c39bb 837 .pru_soreceive = soreceive
984263bc 838};
fa5e758c 839