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.
45 * 3. Neither the name of the University nor the names of its contributors
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>
80 #include <sys/priv.h>
81
82 #include <sys/thread2.h>
83 #include <sys/socketvar2.h>
84 #include <sys/msgport2.h>
85
86 #include <net/if.h>
87 #include <net/route.h>
88 #include <net/if_types.h>
89 #include <net/netisr2.h>
90
91 #include <netinet/in.h>
92 #include <netinet/in_systm.h>
93 #include <netinet/ip.h>
94 #include <netinet/in_pcb.h>
95 #include <netinet/in_var.h>
96 #include <netinet/ip_var.h>
97 #include <netinet/udp.h>
98 #include <netinet/udp_var.h>
99 #include <netinet/ip6.h>
100 #include <netinet6/ip6_var.h>
101 #include <netinet6/in6_pcb.h>
102 #include <netinet/icmp6.h>
103 #include <netinet6/udp6_var.h>
104 #include <netinet6/ip6protosw.h>
105
106 #ifdef IPSEC
107 #include <netinet6/ipsec.h>
108 #include <netinet6/ipsec6.h>
109 #endif /* IPSEC */
110
111 #ifdef FAST_IPSEC
112 #include <netproto/ipsec/ipsec.h>
113 #include <netproto/ipsec/ipsec6.h>
114 #endif /* FAST_IPSEC */
115
116 /*
117 * UDP protocol inplementation.
118 * Per RFC 768, August, 1980.
119 */
120
121 extern struct protosw inetsw[];
122 static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *);
123
124 static int
125 in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp)
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
144 int
145 udp6_input(struct mbuf **mp, int *offp, int proto)
146 {
147 struct mbuf *m = *mp;
148 struct ip6_hdr *ip6;
149 struct udphdr *uh;
150 struct inpcb *in6p;
151 struct mbuf *opts = NULL;
152 int off = *offp;
153 int plen, ulen;
154 struct sockaddr_in6 udp_in6;
155 struct socket *so;
156
157 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
158
159 ip6 = mtod(m, struct ip6_hdr *);
160
161 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
162 /* XXX send icmp6 host/port unreach? */
163 m_freem(m);
164 return IPPROTO_DONE;
165 }
166
167 udp_stat.udps_ipackets++;
168
169 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
170 uh = (struct udphdr *)((caddr_t)ip6 + off);
171 ulen = ntohs((u_short)uh->uh_ulen);
172
173 if (plen != ulen) {
174 udp_stat.udps_badlen++;
175 goto bad;
176 }
177
178 /*
179 * Checksum extended UDP header and data.
180 */
181 if (uh->uh_sum == 0)
182 udp_stat.udps_nosum++;
183 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
184 udp_stat.udps_badsum++;
185 goto bad;
186 }
187
188 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
189 struct inpcb *last;
190
191 /*
192 * Deliver a multicast datagram to all sockets
193 * for which the local and remote addresses and ports match
194 * those of the incoming datagram. This allows more than
195 * one process to receive multicasts on the same port.
196 * (This really ought to be done for unicast datagrams as
197 * well, but that would cause problems with existing
198 * applications that open both address-specific sockets and
199 * a wildcard socket listening to the same port -- they would
200 * end up receiving duplicates of every unicast datagram.
201 * Those applications open the multiple sockets to overcome an
202 * inadequacy of the UDP socket interface, but for backwards
203 * compatibility we avoid the problem here rather than
204 * fixing the interface. Maybe 4.5BSD will remedy this?)
205 */
206
207 /*
208 * In a case that laddr should be set to the link-local
209 * address (this happens in RIPng), the multicast address
210 * specified in the received packet does not match with
211 * laddr. To cure this situation, the matching is relaxed
212 * if the receiving interface is the same as one specified
213 * in the socket and if the destination multicast address
214 * matches one of the multicast groups specified in the socket.
215 */
216
217 /*
218 * Construct sockaddr format source address.
219 */
220 init_sin6(&udp_in6, m); /* general init */
221 udp_in6.sin6_port = uh->uh_sport;
222 /*
223 * KAME note: traditionally we dropped udpiphdr from mbuf here.
224 * We need udphdr for IPsec processing so we do that later.
225 */
226
227 /*
228 * Locate pcb(s) for datagram.
229 * (Algorithm copied from raw_intr().)
230 */
231 last = NULL;
232 LIST_FOREACH(in6p, &udbinfo.pcblisthead, inp_list) {
233 KKASSERT((in6p->inp_flags & INP_PLACEMARKER) == 0);
234
235 if (!(in6p->inp_vflag & INP_IPV6))
236 continue;
237 if (in6p->in6p_lport != uh->uh_dport)
238 continue;
239 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
240 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
241 &ip6->ip6_dst) &&
242 !in6_mcmatch(in6p, &ip6->ip6_dst,
243 m->m_pkthdr.rcvif))
244 continue;
245 }
246 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
247 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
248 &ip6->ip6_src) ||
249 in6p->in6p_fport != uh->uh_sport)
250 continue;
251 }
252
253 if (last != NULL) {
254 struct mbuf *n;
255
256 #ifdef IPSEC
257 /*
258 * Check AH/ESP integrity.
259 */
260 if (ipsec6_in_reject_so(m, last->inp_socket))
261 ipsec6stat.in_polvio++;
262 /* do not inject data into pcb */
263 else
264 #endif /* IPSEC */
265 #ifdef FAST_IPSEC
266 /*
267 * Check AH/ESP integrity.
268 */
269 if (ipsec6_in_reject(m, last))
270 ;
271 else
272 #endif /* FAST_IPSEC */
273 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
274 /*
275 * KAME NOTE: do not
276 * m_copy(m, offset, ...) above.
277 * ssb_appendaddr() expects M_PKTHDR,
278 * and m_copy() will copy M_PKTHDR
279 * only if offset is 0.
280 */
281 so = last->in6p_socket;
282 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
283 (so->so_options & SO_TIMESTAMP)) {
284 ip6_savecontrol(last, &opts,
285 ip6, n);
286 }
287 m_adj(n, off + sizeof(struct udphdr));
288 lwkt_gettoken(&so->so_rcv.ssb_token);
289 if (ssb_appendaddr(&so->so_rcv,
290 (struct sockaddr *)&udp_in6,
291 n, opts) == 0) {
292 m_freem(n);
293 if (opts)
294 m_freem(opts);
295 udp_stat.udps_fullsock++;
296 } else {
297 sorwakeup(so);
298 }
299 lwkt_reltoken(&so->so_rcv.ssb_token);
300 opts = NULL;
301 }
302 }
303 last = in6p;
304 /*
305 * Don't look for additional matches if this one does
306 * not have either the SO_REUSEPORT or SO_REUSEADDR
307 * socket options set. This heuristic avoids searching
308 * through all pcbs in the common case of a non-shared
309 * port. It assumes that an application will never
310 * clear these options after setting them.
311 */
312 if ((last->in6p_socket->so_options &
313 (SO_REUSEPORT | SO_REUSEADDR)) == 0)
314 break;
315 }
316
317 if (last == NULL) {
318 /*
319 * No matching pcb found; discard datagram.
320 * (No need to send an ICMP Port Unreachable
321 * for a broadcast or multicast datgram.)
322 */
323 udp_stat.udps_noport++;
324 udp_stat.udps_noportmcast++;
325 goto bad;
326 }
327 #ifdef IPSEC
328 /*
329 * Check AH/ESP integrity.
330 */
331 if (ipsec6_in_reject_so(m, last->inp_socket)) {
332 ipsec6stat.in_polvio++;
333 goto bad;
334 }
335 #endif /* IPSEC */
336 #ifdef FAST_IPSEC
337 /*
338 * Check AH/ESP integrity.
339 */
340 if (ipsec6_in_reject(m, last)) {
341 goto bad;
342 }
343 #endif /* FAST_IPSEC */
344 if (last->in6p_flags & IN6P_CONTROLOPTS
345 || last->in6p_socket->so_options & SO_TIMESTAMP)
346 ip6_savecontrol(last, &opts, ip6, m);
347
348 m_adj(m, off + sizeof(struct udphdr));
349 so = last->in6p_socket;
350 lwkt_gettoken(&so->so_rcv.ssb_token);
351 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6,
352 m, opts) == 0) {
353 udp_stat.udps_fullsock++;
354 lwkt_reltoken(&so->so_rcv.ssb_token);
355 goto bad;
356 }
357 sorwakeup(so);
358 lwkt_reltoken(&so->so_rcv.ssb_token);
359 return IPPROTO_DONE;
360 }
361 /*
362 * Locate pcb for datagram.
363 */
364 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport,
365 &ip6->ip6_dst, uh->uh_dport, 1,
366 m->m_pkthdr.rcvif);
367 if (in6p == NULL) {
368 if (log_in_vain) {
369 char buf[INET6_ADDRSTRLEN];
370
371 strcpy(buf, ip6_sprintf(&ip6->ip6_dst));
372 log(LOG_INFO,
373 "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
374 buf, ntohs(uh->uh_dport),
375 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport));
376 }
377 udp_stat.udps_noport++;
378 if (m->m_flags & M_MCAST) {
379 kprintf("UDP6: M_MCAST is set in a unicast packet.\n");
380 udp_stat.udps_noportmcast++;
381 goto bad;
382 }
383 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
384 return IPPROTO_DONE;
385 }
386 #ifdef IPSEC
387 /*
388 * Check AH/ESP integrity.
389 */
390 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) {
391 ipsec6stat.in_polvio++;
392 goto bad;
393 }
394 #endif /* IPSEC */
395 #ifdef FAST_IPSEC
396 /*
397 * Check AH/ESP integrity.
398 */
399 if (ipsec6_in_reject(m, in6p)) {
400 goto bad;
401 }
402 #endif /* FAST_IPSEC */
403
404 /*
405 * Construct sockaddr format source address.
406 * Stuff source address and datagram in user buffer.
407 */
408 init_sin6(&udp_in6, m); /* general init */
409 udp_in6.sin6_port = uh->uh_sport;
410 if (in6p->in6p_flags & IN6P_CONTROLOPTS
411 || in6p->in6p_socket->so_options & SO_TIMESTAMP)
412 ip6_savecontrol(in6p, &opts, ip6, m);
413 m_adj(m, off + sizeof(struct udphdr));
414 so = in6p->in6p_socket;
415 lwkt_gettoken(&so->so_rcv.ssb_token);
416 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6,
417 m, opts) == 0) {
418 udp_stat.udps_fullsock++;
419 lwkt_reltoken(&so->so_rcv.ssb_token);
420 goto bad;
421 }
422 sorwakeup(so);
423 lwkt_reltoken(&so->so_rcv.ssb_token);
424 return IPPROTO_DONE;
425 bad:
426 if (m)
427 m_freem(m);
428 if (opts)
429 m_freem(opts);
430 return IPPROTO_DONE;
431 }
432
433 void
434 udp6_ctlinput(netmsg_t msg)
435 {
436 int cmd = msg->ctlinput.nm_cmd;
437 struct sockaddr *sa = msg->ctlinput.nm_arg;
438 void *d = msg->ctlinput.nm_extra;
439 struct udphdr uh;
440 struct ip6_hdr *ip6;
441 struct mbuf *m;
442 int off = 0;
443 struct ip6ctlparam *ip6cp = NULL;
444 const struct sockaddr_in6 *sa6_src = NULL;
445 void (*notify) (struct inpcb *, int) = udp_notify;
446 struct udp_portonly {
447 u_int16_t uh_sport;
448 u_int16_t uh_dport;
449 } *uhp;
450
451 if (sa->sa_family != AF_INET6 ||
452 sa->sa_len != sizeof(struct sockaddr_in6))
453 goto out;
454
455 if ((unsigned)cmd >= PRC_NCMDS)
456 goto out;
457 if (PRC_IS_REDIRECT(cmd))
458 notify = in6_rtchange, d = NULL;
459 else if (cmd == PRC_HOSTDEAD)
460 d = NULL;
461 else if (inet6ctlerrmap[cmd] == 0)
462 goto out;
463
464 /* if the parameter is from icmp6, decode it. */
465 if (d != NULL) {
466 ip6cp = (struct ip6ctlparam *)d;
467 m = ip6cp->ip6c_m;
468 ip6 = ip6cp->ip6c_ip6;
469 off = ip6cp->ip6c_off;
470 sa6_src = ip6cp->ip6c_src;
471 } else {
472 m = NULL;
473 ip6 = NULL;
474 sa6_src = &sa6_any;
475 }
476
477 if (ip6) {
478 /*
479 * XXX: We assume that when IPV6 is non NULL,
480 * M and OFF are valid.
481 */
482
483 /* check if we can safely examine src and dst ports */
484 if (m->m_pkthdr.len < off + sizeof(*uhp))
485 return;
486
487 bzero(&uh, sizeof(uh));
488 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
489
490 in6_pcbnotify(&udbinfo.pcblisthead, sa, uh.uh_dport,
491 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport,
492 cmd, 0, notify);
493 } else {
494 in6_pcbnotify(&udbinfo.pcblisthead, sa, 0,
495 (const struct sockaddr *)sa6_src, 0,
496 cmd, 0, notify);
497 }
498 out:
499 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
500 }
501
502 static int
503 udp6_getcred(SYSCTL_HANDLER_ARGS)
504 {
505 struct sockaddr_in6 addrs[2];
506 struct inpcb *inp;
507 int error;
508
509 error = priv_check(req->td, PRIV_ROOT);
510 if (error)
511 return (error);
512
513 if (req->newlen != sizeof(addrs))
514 return (EINVAL);
515 if (req->oldlen != sizeof(struct ucred))
516 return (EINVAL);
517 error = SYSCTL_IN(req, addrs, sizeof(addrs));
518 if (error)
519 return (error);
520 crit_enter();
521 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr,
522 addrs[1].sin6_port,
523 &addrs[0].sin6_addr, addrs[0].sin6_port,
524 1, NULL);
525 if (!inp || !inp->inp_socket) {
526 error = ENOENT;
527 goto out;
528 }
529 error = SYSCTL_OUT(req, inp->inp_socket->so_cred,
530 sizeof(struct ucred));
531
532 out:
533 crit_exit();
534 return (error);
535 }
536
537 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
538 0, 0,
539 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection");
540
541 /*
542 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
543 * will sofree() it when we return.
544 */
545 static void
546 udp6_abort(netmsg_t msg)
547 {
548 struct socket *so = msg->abort.base.nm_so;
549 struct inpcb *inp;
550 int error;
551
552 inp = so->so_pcb;
553 if (inp) {
554 soisdisconnected(so);
555
556 udbinfo_barrier_set();
557 in6_pcbdetach(inp);
558 udbinfo_barrier_rem();
559 error = 0;
560 } else {
561 error = EINVAL;
562 }
563 lwkt_replymsg(&msg->abort.base.lmsg, error);
564 }
565
566 static void
567 udp6_attach(netmsg_t msg)
568 {
569 struct socket *so = msg->attach.base.nm_so;
570 struct pru_attach_info *ai = msg->attach.nm_ai;
571 struct inpcb *inp;
572 int error;
573
574 inp = so->so_pcb;
575 if (inp != NULL) {
576 error = EINVAL;
577 goto out;
578 }
579
580 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) {
581 error = soreserve(so, udp_sendspace, udp_recvspace,
582 ai->sb_rlimit);
583 if (error)
584 goto out;
585 }
586
587 udbinfo_barrier_set();
588 error = in_pcballoc(so, &udbinfo);
589 udbinfo_barrier_rem();
590
591 if (error)
592 goto out;
593
594 sosetport(so, netisr_cpuport(0));
595 inp = (struct inpcb *)so->so_pcb;
596 inp->inp_vflag |= INP_IPV6;
597 if (!ip6_v6only)
598 inp->inp_vflag |= INP_IPV4;
599 inp->in6p_hops = -1; /* use kernel default */
600 inp->in6p_cksum = -1; /* just to be sure */
601 /*
602 * XXX: ugly!!
603 * IPv4 TTL initialization is necessary for an IPv6 socket as well,
604 * because the socket may be bound to an IPv6 wildcard address,
605 * which may match an IPv4-mapped IPv6 address.
606 */
607 inp->inp_ip_ttl = ip_defttl;
608 error = 0;
609 out:
610 lwkt_replymsg(&msg->attach.base.lmsg, error);
611 }
612
613 static void
614 udp6_bind(netmsg_t msg)
615 {
616 struct socket *so =msg->bind.base.nm_so;
617 struct sockaddr *nam = msg->bind.nm_nam;
618 struct thread *td = msg->bind.nm_td;
619 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam;
620 struct inpcb *inp;
621 int error;
622
623 inp = so->so_pcb;
624 if (inp == NULL) {
625 error = EINVAL;
626 goto out;
627 }
628
629 inp->inp_vflag &= ~INP_IPV4;
630 inp->inp_vflag |= INP_IPV6;
631 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
632 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
633 inp->inp_vflag |= INP_IPV4;
634 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
635 struct sockaddr_in sin;
636
637 in6_sin6_2_sin(&sin, sin6_p);
638 inp->inp_vflag |= INP_IPV4;
639 inp->inp_vflag &= ~INP_IPV6;
640 crit_enter();
641 error = in_pcbbind(inp, (struct sockaddr *)&sin, td);
642 crit_exit();
643 goto out;
644 }
645 }
646
647 crit_enter();
648 error = in6_pcbbind(inp, nam, td);
649 crit_exit();
650 if (error == 0) {
651 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
652 inp->inp_flags |= INP_WASBOUND_NOTANY;
653
654 udbinfo_barrier_set();
655 in_pcbinswildcardhash(inp);
656 udbinfo_barrier_rem();
657 }
658 out:
659 lwkt_replymsg(&msg->bind.base.lmsg, error);
660 }
661
662 static void
663 udp6_connect(netmsg_t msg)
664 {
665 struct socket *so = msg->connect.base.nm_so;
666 struct sockaddr *nam = msg->connect.nm_nam;
667 struct thread *td = msg->connect.nm_td;
668 struct inpcb *inp;
669 int error;
670
671 udbinfo_barrier_set();
672
673 inp = so->so_pcb;
674 if (inp == NULL) {
675 error = EINVAL;
676 goto out;
677 }
678
679 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) {
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
686 if (inp->inp_faddr.s_addr != INADDR_ANY) {
687 error = EISCONN;
688 goto out;
689 }
690 in6_sin6_2_sin(&sin, sin6_p);
691 crit_enter();
692 if (inp->inp_flags & INP_WILDCARD)
693 in_pcbremwildcardhash(inp);
694 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td);
695 crit_exit();
696 if (error == 0) {
697 inp->inp_vflag |= INP_IPV4;
698 inp->inp_vflag &= ~INP_IPV6;
699 soisconnected(so);
700 }
701 goto out;
702 }
703 }
704 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
705 error = EISCONN;
706 goto out;
707 }
708 if (inp->inp_flags & INP_WILDCARD)
709 in_pcbremwildcardhash(inp);
710 if (!prison_remote_ip(td, nam)) {
711 error = EAFNOSUPPORT; /* IPv4 only jail */
712 goto out;
713 }
714 crit_enter();
715 error = in6_pcbconnect(inp, nam, td);
716 crit_exit();
717 if (error == 0) {
718 if (!ip6_v6only) { /* should be non mapped addr */
719 inp->inp_vflag &= ~INP_IPV4;
720 inp->inp_vflag |= INP_IPV6;
721 }
722 soisconnected(so);
723 } else if (error == EAFNOSUPPORT) { /* connection dissolved */
724 /*
725 * Follow traditional BSD behavior and retain
726 * the local port binding. But, fix the old misbehavior
727 * of overwriting any previously bound local address.
728 */
729 if (!(inp->inp_flags & INP_WASBOUND_NOTANY))
730 inp->in6p_laddr = kin6addr_any;
731 in_pcbinswildcardhash(inp);
732 }
733 out:
734 udbinfo_barrier_rem();
735 lwkt_replymsg(&msg->connect.base.lmsg, error);
736 }
737
738 static void
739 udp6_detach(netmsg_t msg)
740 {
741 struct socket *so = msg->detach.base.nm_so;
742 struct inpcb *inp;
743 int error;
744
745 inp = so->so_pcb;
746 if (inp) {
747 udbinfo_barrier_set();
748 in6_pcbdetach(inp);
749 udbinfo_barrier_rem();
750 error = 0;
751 } else {
752 error = EINVAL;
753 }
754 lwkt_replymsg(&msg->detach.base.lmsg, error);
755 }
756
757 static void
758 udp6_disconnect(netmsg_t msg)
759 {
760 struct socket *so = msg->disconnect.base.nm_so;
761 struct inpcb *inp;
762 int error;
763
764 inp = so->so_pcb;
765 if (inp == NULL) {
766 error = EINVAL;
767 goto out;
768 }
769
770 if (inp->inp_vflag & INP_IPV4) {
771 const struct pr_usrreqs *pru;
772
773 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
774 pru->pru_disconnect(msg); /* XXX on right port? */
775 return;
776 }
777
778 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
779 error = ENOTCONN;
780 } else {
781 udbinfo_barrier_set();
782 in6_pcbdisconnect(inp);
783 udbinfo_barrier_rem();
784 soclrstate(so, SS_ISCONNECTED); /* XXX */
785 error = 0;
786 }
787 out:
788 lwkt_replymsg(&msg->disconnect.base.lmsg, error);
789 }
790
791 static void
792 udp6_send(netmsg_t msg)
793 {
794 struct socket *so = msg->send.base.nm_so;
795 struct mbuf *m = msg->send.nm_m;
796 struct sockaddr *addr = msg->send.nm_addr;
797 struct mbuf *control = msg->send.nm_control;
798 struct thread *td = msg->send.nm_td;
799 struct inpcb *inp;
800 int error = 0;
801
802 inp = so->so_pcb;
803 if (inp == NULL) {
804 error = EINVAL;
805 goto bad;
806 }
807
808 if (addr) {
809 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
810 error = EINVAL;
811 goto bad;
812 }
813 if (addr->sa_family != AF_INET6) {
814 error = EAFNOSUPPORT;
815 goto bad;
816 }
817 }
818
819 if (!ip6_v6only) {
820 int hasv4addr;
821 struct sockaddr_in6 *sin6 = NULL;
822
823 if (addr == NULL)
824 hasv4addr = (inp->inp_vflag & INP_IPV4);
825 else {
826 sin6 = (struct sockaddr_in6 *)addr;
827 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
828 ? 1 : 0;
829 }
830 if (hasv4addr) {
831 const struct pr_usrreqs *pru;
832
833 if (sin6)
834 in6_sin6_2_sin_in_sock(addr);
835 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
836 pru->pru_send(msg);
837 /* msg invalid now */
838 return;
839 }
840 }
841
842 error = udp6_output(inp, m, addr, control, td);
843 lwkt_replymsg(&msg->send.base.lmsg, error);
844 return;
845 bad:
846 m_freem(m);
847 lwkt_replymsg(&msg->send.base.lmsg, error);
848 }
849
850 struct pr_usrreqs udp6_usrreqs = {
851 .pru_abort = udp6_abort,
852 .pru_accept = pr_generic_notsupp,
853 .pru_attach = udp6_attach,
854 .pru_bind = udp6_bind,
855 .pru_connect = udp6_connect,
856 .pru_connect2 = pr_generic_notsupp,
857 .pru_control = in6_control_dispatch,
858 .pru_detach = udp6_detach,
859 .pru_disconnect = udp6_disconnect,
860 .pru_listen = pr_generic_notsupp,
861 .pru_peeraddr = in6_mapped_peeraddr_dispatch,
862 .pru_rcvd = pr_generic_notsupp,
863 .pru_rcvoob = pr_generic_notsupp,
864 .pru_send = udp6_send,
865 .pru_sense = pru_sense_null,
866 .pru_shutdown = udp_shutdown,
867 .pru_sockaddr = in6_mapped_sockaddr_dispatch,
868 .pru_sosend = sosend,
869 .pru_soreceive = soreceive
870 };
871
Cache object: 763857d9150711dc38a07e0cf2f3a2b2
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