1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Copyright (c) 2010-2011 Juniper Networks, Inc.
6 * Copyright (c) 2014 Kevin Lo
7 * All rights reserved.
8 *
9 * Portions of this software were developed by Robert N. M. Watson under
10 * contract to Juniper Networks, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the project nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $
37 * $KAME: udp6_output.c,v 1.31 2001/05/21 16:39:15 jinmei Exp $
38 */
39
40 /*-
41 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
42 * The Regents of the University of California.
43 * All rights reserved.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
50 * 2. Redistributions in binary form must reproduce the above copyright
51 * notice, this list of conditions and the following disclaimer in the
52 * documentation and/or other materials provided with the distribution.
53 * 3. Neither the name of the University nor the names of its contributors
54 * may be used to endorse or promote products derived from this software
55 * without specific prior written permission.
56 *
57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
67 * SUCH DAMAGE.
68 *
69 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
70 */
71
72 #include <sys/cdefs.h>
73 __FBSDID("$FreeBSD$");
74
75 #include "opt_inet.h"
76 #include "opt_inet6.h"
77 #include "opt_ipsec.h"
78 #include "opt_route.h"
79 #include "opt_rss.h"
80
81 #include <sys/param.h>
82 #include <sys/jail.h>
83 #include <sys/kernel.h>
84 #include <sys/lock.h>
85 #include <sys/mbuf.h>
86 #include <sys/priv.h>
87 #include <sys/proc.h>
88 #include <sys/protosw.h>
89 #include <sys/sdt.h>
90 #include <sys/signalvar.h>
91 #include <sys/socket.h>
92 #include <sys/socketvar.h>
93 #include <sys/sx.h>
94 #include <sys/sysctl.h>
95 #include <sys/syslog.h>
96 #include <sys/systm.h>
97
98 #include <net/if.h>
99 #include <net/if_var.h>
100 #include <net/if_types.h>
101 #include <net/route.h>
102 #include <net/rss_config.h>
103
104 #include <netinet/in.h>
105 #include <netinet/in_kdtrace.h>
106 #include <netinet/in_pcb.h>
107 #include <netinet/in_systm.h>
108 #include <netinet/in_var.h>
109 #include <netinet/ip.h>
110 #include <netinet/ip6.h>
111 #include <netinet/icmp6.h>
112 #include <netinet/ip_var.h>
113 #include <netinet/udp.h>
114 #include <netinet/udp_var.h>
115 #include <netinet/udplite.h>
116
117 #include <netinet6/ip6_var.h>
118 #include <netinet6/in6_fib.h>
119 #include <netinet6/in6_pcb.h>
120 #include <netinet6/in6_rss.h>
121 #include <netinet6/udp6_var.h>
122 #include <netinet6/scope6_var.h>
123
124 #include <netipsec/ipsec_support.h>
125
126 #include <security/mac/mac_framework.h>
127
128 VNET_DEFINE(int, zero_checksum_port) = 0;
129 #define V_zero_checksum_port VNET(zero_checksum_port)
130 SYSCTL_INT(_net_inet6_udp6, OID_AUTO, rfc6935_port, CTLFLAG_VNET | CTLFLAG_RW,
131 &VNET_NAME(zero_checksum_port), 0,
132 "Zero UDP checksum allowed for traffic to/from this port.");
133
134 /*
135 * UDP protocol implementation.
136 * Per RFC 768, August, 1980.
137 */
138
139 static void udp6_detach(struct socket *so);
140
141 static int
142 udp6_append(struct inpcb *inp, struct mbuf *n, int off,
143 struct sockaddr_in6 *fromsa)
144 {
145 struct socket *so;
146 struct mbuf *opts = NULL, *tmp_opts;
147 struct udpcb *up;
148 bool filtered;
149
150 INP_LOCK_ASSERT(inp);
151
152 /*
153 * Engage the tunneling protocol.
154 */
155 up = intoudpcb(inp);
156 if (up->u_tun_func != NULL) {
157 in_pcbref(inp);
158 INP_RUNLOCK(inp);
159 filtered = (*up->u_tun_func)(n, off, inp,
160 (struct sockaddr *)&fromsa[0], up->u_tun_ctx);
161 INP_RLOCK(inp);
162 if (filtered)
163 return (in_pcbrele_rlocked(inp));
164 }
165 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
166 /* Check AH/ESP integrity. */
167 if (IPSEC_ENABLED(ipv6)) {
168 if (IPSEC_CHECK_POLICY(ipv6, n, inp) != 0) {
169 m_freem(n);
170 return (0);
171 }
172 }
173 #endif /* IPSEC */
174 #ifdef MAC
175 if (mac_inpcb_check_deliver(inp, n) != 0) {
176 m_freem(n);
177 return (0);
178 }
179 #endif
180 opts = NULL;
181 if (inp->inp_flags & INP_CONTROLOPTS ||
182 inp->inp_socket->so_options & SO_TIMESTAMP)
183 ip6_savecontrol(inp, n, &opts);
184 if ((inp->inp_vflag & INP_IPV6) && (inp->inp_flags2 & INP_ORIGDSTADDR)) {
185 tmp_opts = sbcreatecontrol(&fromsa[1],
186 sizeof(struct sockaddr_in6), IPV6_ORIGDSTADDR,
187 IPPROTO_IPV6, M_NOWAIT);
188 if (tmp_opts) {
189 if (opts) {
190 tmp_opts->m_next = opts;
191 opts = tmp_opts;
192 } else
193 opts = tmp_opts;
194 }
195 }
196 m_adj(n, off + sizeof(struct udphdr));
197
198 so = inp->inp_socket;
199 SOCKBUF_LOCK(&so->so_rcv);
200 if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)&fromsa[0], n,
201 opts) == 0) {
202 soroverflow_locked(so);
203 m_freem(n);
204 if (opts)
205 m_freem(opts);
206 UDPSTAT_INC(udps_fullsock);
207 } else
208 sorwakeup_locked(so);
209 return (0);
210 }
211
212 struct udp6_multi_match_ctx {
213 struct ip6_hdr *ip6;
214 struct udphdr *uh;
215 };
216
217 static bool
218 udp6_multi_match(const struct inpcb *inp, void *v)
219 {
220 struct udp6_multi_match_ctx *ctx = v;
221
222 if ((inp->inp_vflag & INP_IPV6) == 0)
223 return(false);
224 if (inp->inp_lport != ctx->uh->uh_dport)
225 return(false);
226 if (inp->inp_fport != 0 && inp->inp_fport != ctx->uh->uh_sport)
227 return(false);
228 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
229 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ctx->ip6->ip6_dst))
230 return (false);
231 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
232 (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ctx->ip6->ip6_src) ||
233 inp->inp_fport != ctx->uh->uh_sport))
234 return (false);
235
236 return (true);
237 }
238
239 static int
240 udp6_multi_input(struct mbuf *m, int off, int proto,
241 struct sockaddr_in6 *fromsa)
242 {
243 struct udp6_multi_match_ctx ctx;
244 struct inpcb_iterator inpi = INP_ITERATOR(udp_get_inpcbinfo(proto),
245 INPLOOKUP_RLOCKPCB, udp6_multi_match, &ctx);
246 struct inpcb *inp;
247 struct ip6_moptions *imo;
248 struct mbuf *n;
249 int appends = 0;
250
251 /*
252 * In the event that laddr should be set to the link-local
253 * address (this happens in RIPng), the multicast address
254 * specified in the received packet will not match laddr. To
255 * handle this situation, matching is relaxed if the
256 * receiving interface is the same as one specified in the
257 * socket and if the destination multicast address matches
258 * one of the multicast groups specified in the socket.
259 */
260
261 /*
262 * KAME note: traditionally we dropped udpiphdr from mbuf
263 * here. We need udphdr for IPsec processing so we do that
264 * later.
265 */
266 ctx.ip6 = mtod(m, struct ip6_hdr *);
267 ctx.uh = (struct udphdr *)((char *)ctx.ip6 + off);
268 while ((inp = inp_next(&inpi)) != NULL) {
269 INP_RLOCK_ASSERT(inp);
270 /*
271 * XXXRW: Because we weren't holding either the inpcb
272 * or the hash lock when we checked for a match
273 * before, we should probably recheck now that the
274 * inpcb lock is (supposed to be) held.
275 */
276 /*
277 * Handle socket delivery policy for any-source
278 * and source-specific multicast. [RFC3678]
279 */
280 if ((imo = inp->in6p_moptions) != NULL) {
281 struct sockaddr_in6 mcaddr;
282 int blocked;
283
284 bzero(&mcaddr, sizeof(struct sockaddr_in6));
285 mcaddr.sin6_len = sizeof(struct sockaddr_in6);
286 mcaddr.sin6_family = AF_INET6;
287 mcaddr.sin6_addr = ctx.ip6->ip6_dst;
288
289 blocked = im6o_mc_filter(imo, m->m_pkthdr.rcvif,
290 (struct sockaddr *)&mcaddr,
291 (struct sockaddr *)&fromsa[0]);
292 if (blocked != MCAST_PASS) {
293 if (blocked == MCAST_NOTGMEMBER)
294 IP6STAT_INC(ip6s_notmember);
295 if (blocked == MCAST_NOTSMEMBER ||
296 blocked == MCAST_MUTED)
297 UDPSTAT_INC(udps_filtermcast);
298 continue;
299 }
300 }
301 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) {
302 if (proto == IPPROTO_UDPLITE)
303 UDPLITE_PROBE(receive, NULL, inp, ctx.ip6,
304 inp, ctx.uh);
305 else
306 UDP_PROBE(receive, NULL, inp, ctx.ip6, inp,
307 ctx.uh);
308 if (udp6_append(inp, n, off, fromsa)) {
309 break;
310 } else
311 appends++;
312 }
313 /*
314 * Don't look for additional matches if this one does
315 * not have either the SO_REUSEPORT or SO_REUSEADDR
316 * socket options set. This heuristic avoids
317 * searching through all pcbs in the common case of a
318 * non-shared port. It assumes that an application
319 * will never clear these options after setting them.
320 */
321 if ((inp->inp_socket->so_options &
322 (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0) {
323 INP_RUNLOCK(inp);
324 break;
325 }
326 }
327 m_freem(m);
328
329 if (appends == 0) {
330 /*
331 * No matching pcb found; discard datagram. (No need
332 * to send an ICMP Port Unreachable for a broadcast
333 * or multicast datgram.)
334 */
335 UDPSTAT_INC(udps_noport);
336 UDPSTAT_INC(udps_noportmcast);
337 }
338
339 return (IPPROTO_DONE);
340 }
341
342 int
343 udp6_input(struct mbuf **mp, int *offp, int proto)
344 {
345 struct mbuf *m = *mp;
346 struct ip6_hdr *ip6;
347 struct udphdr *uh;
348 struct inpcb *inp;
349 struct inpcbinfo *pcbinfo;
350 struct udpcb *up;
351 int off = *offp;
352 int cscov_partial;
353 int plen, ulen;
354 struct sockaddr_in6 fromsa[2];
355 struct m_tag *fwd_tag;
356 uint16_t uh_sum;
357 uint8_t nxt;
358
359 NET_EPOCH_ASSERT();
360
361 if (m->m_len < off + sizeof(struct udphdr)) {
362 m = m_pullup(m, off + sizeof(struct udphdr));
363 if (m == NULL) {
364 IP6STAT_INC(ip6s_exthdrtoolong);
365 *mp = NULL;
366 return (IPPROTO_DONE);
367 }
368 }
369 ip6 = mtod(m, struct ip6_hdr *);
370 uh = (struct udphdr *)((caddr_t)ip6 + off);
371
372 UDPSTAT_INC(udps_ipackets);
373
374 /*
375 * Destination port of 0 is illegal, based on RFC768.
376 */
377 if (uh->uh_dport == 0)
378 goto badunlocked;
379
380 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
381 ulen = ntohs((u_short)uh->uh_ulen);
382
383 nxt = proto;
384 cscov_partial = (nxt == IPPROTO_UDPLITE) ? 1 : 0;
385 if (nxt == IPPROTO_UDPLITE) {
386 /* Zero means checksum over the complete packet. */
387 if (ulen == 0)
388 ulen = plen;
389 if (ulen == plen)
390 cscov_partial = 0;
391 if ((ulen < sizeof(struct udphdr)) || (ulen > plen)) {
392 /* XXX: What is the right UDPLite MIB counter? */
393 goto badunlocked;
394 }
395 if (uh->uh_sum == 0) {
396 /* XXX: What is the right UDPLite MIB counter? */
397 goto badunlocked;
398 }
399 } else {
400 if ((ulen < sizeof(struct udphdr)) || (plen != ulen)) {
401 UDPSTAT_INC(udps_badlen);
402 goto badunlocked;
403 }
404 if (uh->uh_sum == 0) {
405 UDPSTAT_INC(udps_nosum);
406 /*
407 * dport 0 was rejected earlier so this is OK even if
408 * zero_checksum_port is 0 (which is its default value).
409 */
410 if (ntohs(uh->uh_dport) == V_zero_checksum_port)
411 goto skip_checksum;
412 else
413 goto badunlocked;
414 }
415 }
416
417 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) &&
418 !cscov_partial) {
419 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
420 uh_sum = m->m_pkthdr.csum_data;
421 else
422 uh_sum = in6_cksum_pseudo(ip6, ulen, nxt,
423 m->m_pkthdr.csum_data);
424 uh_sum ^= 0xffff;
425 } else
426 uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen);
427
428 if (uh_sum != 0) {
429 UDPSTAT_INC(udps_badsum);
430 goto badunlocked;
431 }
432
433 skip_checksum:
434 /*
435 * Construct sockaddr format source address.
436 */
437 init_sin6(&fromsa[0], m, 0);
438 fromsa[0].sin6_port = uh->uh_sport;
439 init_sin6(&fromsa[1], m, 1);
440 fromsa[1].sin6_port = uh->uh_dport;
441
442 pcbinfo = udp_get_inpcbinfo(nxt);
443 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
444 *mp = NULL;
445 return (udp6_multi_input(m, off, proto, fromsa));
446 }
447
448 /*
449 * Locate pcb for datagram.
450 */
451
452 /*
453 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
454 */
455 if ((m->m_flags & M_IP6_NEXTHOP) &&
456 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
457 struct sockaddr_in6 *next_hop6;
458
459 next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1);
460
461 /*
462 * Transparently forwarded. Pretend to be the destination.
463 * Already got one like this?
464 */
465 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src,
466 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
467 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m);
468 if (!inp) {
469 /*
470 * It's new. Try to find the ambushing socket.
471 * Because we've rewritten the destination address,
472 * any hardware-generated hash is ignored.
473 */
474 inp = in6_pcblookup(pcbinfo, &ip6->ip6_src,
475 uh->uh_sport, &next_hop6->sin6_addr,
476 next_hop6->sin6_port ? htons(next_hop6->sin6_port) :
477 uh->uh_dport, INPLOOKUP_WILDCARD |
478 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif);
479 }
480 /* Remove the tag from the packet. We don't need it anymore. */
481 m_tag_delete(m, fwd_tag);
482 m->m_flags &= ~M_IP6_NEXTHOP;
483 } else
484 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src,
485 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
486 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB,
487 m->m_pkthdr.rcvif, m);
488 if (inp == NULL) {
489 if (V_udp_log_in_vain) {
490 char ip6bufs[INET6_ADDRSTRLEN];
491 char ip6bufd[INET6_ADDRSTRLEN];
492
493 log(LOG_INFO,
494 "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
495 ip6_sprintf(ip6bufd, &ip6->ip6_dst),
496 ntohs(uh->uh_dport),
497 ip6_sprintf(ip6bufs, &ip6->ip6_src),
498 ntohs(uh->uh_sport));
499 }
500 if (nxt == IPPROTO_UDPLITE)
501 UDPLITE_PROBE(receive, NULL, NULL, ip6, NULL, uh);
502 else
503 UDP_PROBE(receive, NULL, NULL, ip6, NULL, uh);
504 UDPSTAT_INC(udps_noport);
505 if (m->m_flags & M_MCAST) {
506 printf("UDP6: M_MCAST is set in a unicast packet.\n");
507 UDPSTAT_INC(udps_noportmcast);
508 goto badunlocked;
509 }
510 if (V_udp_blackhole && (V_udp_blackhole_local ||
511 !in6_localaddr(&ip6->ip6_src)))
512 goto badunlocked;
513 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
514 *mp = NULL;
515 return (IPPROTO_DONE);
516 }
517 INP_RLOCK_ASSERT(inp);
518 up = intoudpcb(inp);
519 if (cscov_partial) {
520 if (up->u_rxcslen == 0 || up->u_rxcslen > ulen) {
521 INP_RUNLOCK(inp);
522 m_freem(m);
523 *mp = NULL;
524 return (IPPROTO_DONE);
525 }
526 }
527 if (nxt == IPPROTO_UDPLITE)
528 UDPLITE_PROBE(receive, NULL, inp, ip6, inp, uh);
529 else
530 UDP_PROBE(receive, NULL, inp, ip6, inp, uh);
531 if (udp6_append(inp, m, off, fromsa) == 0)
532 INP_RUNLOCK(inp);
533 *mp = NULL;
534 return (IPPROTO_DONE);
535
536 badunlocked:
537 m_freem(m);
538 *mp = NULL;
539 return (IPPROTO_DONE);
540 }
541
542 static void
543 udp6_common_ctlinput(struct ip6ctlparam *ip6cp, struct inpcbinfo *pcbinfo)
544 {
545 struct udphdr uh;
546 struct ip6_hdr *ip6;
547 struct mbuf *m;
548 struct inpcb *inp;
549 int errno, off = 0;
550 struct udp_portonly {
551 u_int16_t uh_sport;
552 u_int16_t uh_dport;
553 } *uhp;
554
555 if ((errno = icmp6_errmap(ip6cp->ip6c_icmp6)) == 0)
556 return;
557
558 m = ip6cp->ip6c_m;
559 ip6 = ip6cp->ip6c_ip6;
560 off = ip6cp->ip6c_off;
561
562 /* Check if we can safely examine src and dst ports. */
563 if (m->m_pkthdr.len < off + sizeof(*uhp))
564 return;
565
566 bzero(&uh, sizeof(uh));
567 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
568
569 /* Check to see if its tunneled */
570 inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_dst, uh.uh_dport,
571 &ip6->ip6_src, uh.uh_sport, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB,
572 m->m_pkthdr.rcvif, m);
573 if (inp != NULL) {
574 struct udpcb *up;
575 udp_tun_icmp_t *func;
576
577 up = intoudpcb(inp);
578 func = up->u_icmp_func;
579 INP_RUNLOCK(inp);
580 if (func != NULL)
581 func(ip6cp);
582 }
583 in6_pcbnotify(pcbinfo, ip6cp->ip6c_finaldst, uh.uh_dport,
584 ip6cp->ip6c_src, uh.uh_sport, errno, ip6cp->ip6c_cmdarg,
585 udp_notify);
586 }
587
588 static void
589 udp6_ctlinput(struct ip6ctlparam *ctl)
590 {
591
592 return (udp6_common_ctlinput(ctl, &V_udbinfo));
593 }
594
595 static void
596 udplite6_ctlinput(struct ip6ctlparam *ctl)
597 {
598
599 return (udp6_common_ctlinput(ctl, &V_ulitecbinfo));
600 }
601
602 static int
603 udp6_getcred(SYSCTL_HANDLER_ARGS)
604 {
605 struct xucred xuc;
606 struct sockaddr_in6 addrs[2];
607 struct epoch_tracker et;
608 struct inpcb *inp;
609 int error;
610
611 error = priv_check(req->td, PRIV_NETINET_GETCRED);
612 if (error)
613 return (error);
614
615 if (req->newlen != sizeof(addrs))
616 return (EINVAL);
617 if (req->oldlen != sizeof(struct xucred))
618 return (EINVAL);
619 error = SYSCTL_IN(req, addrs, sizeof(addrs));
620 if (error)
621 return (error);
622 if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 ||
623 (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) {
624 return (error);
625 }
626 NET_EPOCH_ENTER(et);
627 inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr,
628 addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port,
629 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
630 NET_EPOCH_EXIT(et);
631 if (inp != NULL) {
632 INP_RLOCK_ASSERT(inp);
633 if (inp->inp_socket == NULL)
634 error = ENOENT;
635 if (error == 0)
636 error = cr_canseesocket(req->td->td_ucred,
637 inp->inp_socket);
638 if (error == 0)
639 cru2x(inp->inp_cred, &xuc);
640 INP_RUNLOCK(inp);
641 } else
642 error = ENOENT;
643 if (error == 0)
644 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
645 return (error);
646 }
647
648 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred,
649 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_MPSAFE,
650 0, 0, udp6_getcred, "S,xucred",
651 "Get the xucred of a UDP6 connection");
652
653 static int
654 udp6_send(struct socket *so, int flags_arg, struct mbuf *m,
655 struct sockaddr *addr6, struct mbuf *control, struct thread *td)
656 {
657 struct inpcb *inp;
658 struct ip6_hdr *ip6;
659 struct udphdr *udp6;
660 struct in6_addr *laddr, *faddr, in6a;
661 struct ip6_pktopts *optp, opt;
662 struct sockaddr_in6 *sin6, tmp;
663 struct epoch_tracker et;
664 int cscov_partial, error, flags, hlen, scope_ambiguous;
665 u_int32_t ulen, plen;
666 uint16_t cscov;
667 u_short fport;
668 uint8_t nxt;
669
670 if (addr6) {
671 error = 0;
672 if (addr6->sa_family != AF_INET6)
673 error = EAFNOSUPPORT;
674 else if (addr6->sa_len != sizeof(struct sockaddr_in6))
675 error = EINVAL;
676 if (__predict_false(error != 0)) {
677 m_freem(control);
678 m_freem(m);
679 return (error);
680 }
681 }
682
683 sin6 = (struct sockaddr_in6 *)addr6;
684
685 /*
686 * In contrast to IPv4 we do not validate the max. packet length
687 * here due to IPv6 Jumbograms (RFC2675).
688 */
689
690 scope_ambiguous = 0;
691 if (sin6) {
692 /* Protect *addr6 from overwrites. */
693 tmp = *sin6;
694 sin6 = &tmp;
695
696 /*
697 * Application should provide a proper zone ID or the use of
698 * default zone IDs should be enabled. Unfortunately, some
699 * applications do not behave as it should, so we need a
700 * workaround. Even if an appropriate ID is not determined,
701 * we'll see if we can determine the outgoing interface. If we
702 * can, determine the zone ID based on the interface below.
703 */
704 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
705 scope_ambiguous = 1;
706 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) {
707 if (control)
708 m_freem(control);
709 m_freem(m);
710 return (error);
711 }
712 }
713
714 inp = sotoinpcb(so);
715 KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
716 /*
717 * In the following cases we want a write lock on the inp for either
718 * local operations or for possible route cache updates in the IPv6
719 * output path:
720 * - on connected sockets (sin6 is NULL) for route cache updates,
721 * - when we are not bound to an address and source port (it is
722 * in6_pcbsetport() which will require the write lock).
723 *
724 * We check the inp fields before actually locking the inp, so
725 * here exists a race, and we may WLOCK the inp and end with already
726 * bound one by other thread. This is fine.
727 */
728 if (sin6 == NULL || (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
729 inp->inp_lport == 0))
730 INP_WLOCK(inp);
731 else
732 INP_RLOCK(inp);
733
734 nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ?
735 IPPROTO_UDP : IPPROTO_UDPLITE;
736
737 #ifdef INET
738 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
739 int hasv4addr;
740
741 if (sin6 == NULL)
742 hasv4addr = (inp->inp_vflag & INP_IPV4);
743 else
744 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
745 ? 1 : 0;
746 if (hasv4addr) {
747 /*
748 * XXXRW: We release UDP-layer locks before calling
749 * udp_send() in order to avoid recursion. However,
750 * this does mean there is a short window where inp's
751 * fields are unstable. Could this lead to a
752 * potential race in which the factors causing us to
753 * select the UDPv4 output routine are invalidated?
754 */
755 INP_UNLOCK(inp);
756 if (sin6)
757 in6_sin6_2_sin_in_sock((struct sockaddr *)sin6);
758 /* addr will just be freed in sendit(). */
759 return (udp_send(so, flags_arg | PRUS_IPV6, m,
760 (struct sockaddr *)sin6, control, td));
761 }
762 } else
763 #endif
764 if (sin6 && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
765 /*
766 * Given this is either an IPv6-only socket or no INET is
767 * supported we will fail the send if the given destination
768 * address is a v4mapped address.
769 *
770 * XXXGL: do we leak m and control?
771 */
772 INP_UNLOCK(inp);
773 return (EINVAL);
774 }
775
776 NET_EPOCH_ENTER(et);
777 if (control) {
778 if ((error = ip6_setpktopts(control, &opt,
779 inp->in6p_outputopts, td->td_ucred, nxt)) != 0) {
780 goto release;
781 }
782 optp = &opt;
783 } else
784 optp = inp->in6p_outputopts;
785
786 if (sin6) {
787 /*
788 * Since we saw no essential reason for calling in_pcbconnect,
789 * we get rid of such kind of logic, and call in6_selectsrc
790 * and in6_pcbsetport in order to fill in the local address
791 * and the local port.
792 */
793 if (sin6->sin6_port == 0) {
794 error = EADDRNOTAVAIL;
795 goto release;
796 }
797
798 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
799 /* how about ::ffff:0.0.0.0 case? */
800 error = EISCONN;
801 goto release;
802 }
803
804 /*
805 * Given we handle the v4mapped case in the INET block above
806 * assert here that it must not happen anymore.
807 */
808 KASSERT(!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr),
809 ("%s: sin6(%p)->sin6_addr is v4mapped which we "
810 "should have handled.", __func__, sin6));
811
812 /* This only requires read-locking. */
813 error = in6_selectsrc_socket(sin6, optp, inp,
814 td->td_ucred, scope_ambiguous, &in6a, NULL);
815 if (error)
816 goto release;
817 laddr = &in6a;
818
819 if (inp->inp_lport == 0) {
820 struct inpcbinfo *pcbinfo;
821
822 INP_WLOCK_ASSERT(inp);
823
824 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
825 INP_HASH_WLOCK(pcbinfo);
826 error = in6_pcbsetport(laddr, inp, td->td_ucred);
827 INP_HASH_WUNLOCK(pcbinfo);
828 if (error != 0) {
829 /* Undo an address bind that may have occurred. */
830 inp->in6p_laddr = in6addr_any;
831 goto release;
832 }
833 }
834 faddr = &sin6->sin6_addr;
835 fport = sin6->sin6_port; /* allow 0 port */
836
837 } else {
838 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
839 error = ENOTCONN;
840 goto release;
841 }
842 laddr = &inp->in6p_laddr;
843 faddr = &inp->in6p_faddr;
844 fport = inp->inp_fport;
845 }
846
847 ulen = m->m_pkthdr.len;
848 plen = sizeof(struct udphdr) + ulen;
849 hlen = sizeof(struct ip6_hdr);
850
851 /*
852 * Calculate data length and get a mbuf
853 * for UDP and IP6 headers.
854 */
855 M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT);
856 if (m == NULL) {
857 error = ENOBUFS;
858 goto release;
859 }
860
861 /*
862 * Stuff checksum and output datagram.
863 */
864 cscov = cscov_partial = 0;
865 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen);
866 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */
867 udp6->uh_dport = fport;
868 if (nxt == IPPROTO_UDPLITE) {
869 struct udpcb *up;
870
871 up = intoudpcb(inp);
872 cscov = up->u_txcslen;
873 if (cscov >= plen)
874 cscov = 0;
875 udp6->uh_ulen = htons(cscov);
876 /*
877 * For UDP-Lite, checksum coverage length of zero means
878 * the entire UDPLite packet is covered by the checksum.
879 */
880 cscov_partial = (cscov == 0) ? 0 : 1;
881 } else if (plen <= 0xffff)
882 udp6->uh_ulen = htons((u_short)plen);
883 else
884 udp6->uh_ulen = 0;
885 udp6->uh_sum = 0;
886
887 ip6 = mtod(m, struct ip6_hdr *);
888 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK;
889 ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
890 ip6->ip6_vfc |= IPV6_VERSION;
891 ip6->ip6_plen = htons((u_short)plen);
892 ip6->ip6_nxt = nxt;
893 ip6->ip6_hlim = in6_selecthlim(inp, NULL);
894 ip6->ip6_src = *laddr;
895 ip6->ip6_dst = *faddr;
896
897 #ifdef MAC
898 mac_inpcb_create_mbuf(inp, m);
899 #endif
900
901 if (cscov_partial) {
902 if ((udp6->uh_sum = in6_cksum_partial(m, nxt,
903 sizeof(struct ip6_hdr), plen, cscov)) == 0)
904 udp6->uh_sum = 0xffff;
905 } else {
906 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0);
907 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6;
908 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
909 }
910
911 flags = 0;
912 #if defined(ROUTE_MPATH) || defined(RSS)
913 if (CALC_FLOWID_OUTBOUND_SENDTO) {
914 uint32_t hash_type, hash_val;
915 uint8_t pr;
916
917 pr = inp->inp_socket->so_proto->pr_protocol;
918
919 hash_val = fib6_calc_packet_hash(laddr, faddr,
920 inp->inp_lport, fport, pr, &hash_type);
921 m->m_pkthdr.flowid = hash_val;
922 M_HASHTYPE_SET(m, hash_type);
923 }
924 /* do not use inp flowid */
925 flags |= IP_NODEFAULTFLOWID;
926 #endif
927
928 UDPSTAT_INC(udps_opackets);
929 if (nxt == IPPROTO_UDPLITE)
930 UDPLITE_PROBE(send, NULL, inp, ip6, inp, udp6);
931 else
932 UDP_PROBE(send, NULL, inp, ip6, inp, udp6);
933 error = ip6_output(m, optp,
934 INP_WLOCKED(inp) ? &inp->inp_route6 : NULL, flags,
935 inp->in6p_moptions, NULL, inp);
936 INP_UNLOCK(inp);
937 NET_EPOCH_EXIT(et);
938
939 if (control) {
940 ip6_clearpktopts(&opt, -1);
941 m_freem(control);
942 }
943 return (error);
944
945 release:
946 INP_UNLOCK(inp);
947 NET_EPOCH_EXIT(et);
948 if (control) {
949 ip6_clearpktopts(&opt, -1);
950 m_freem(control);
951 }
952 m_freem(m);
953
954 return (error);
955 }
956
957 static void
958 udp6_abort(struct socket *so)
959 {
960 struct inpcb *inp;
961 struct inpcbinfo *pcbinfo;
962
963 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
964 inp = sotoinpcb(so);
965 KASSERT(inp != NULL, ("udp6_abort: inp == NULL"));
966
967 INP_WLOCK(inp);
968 #ifdef INET
969 if (inp->inp_vflag & INP_IPV4) {
970 INP_WUNLOCK(inp);
971 udp_abort(so);
972 return;
973 }
974 #endif
975
976 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
977 INP_HASH_WLOCK(pcbinfo);
978 in6_pcbdisconnect(inp);
979 inp->in6p_laddr = in6addr_any;
980 INP_HASH_WUNLOCK(pcbinfo);
981 soisdisconnected(so);
982 }
983 INP_WUNLOCK(inp);
984 }
985
986 static int
987 udp6_attach(struct socket *so, int proto, struct thread *td)
988 {
989 struct inpcbinfo *pcbinfo;
990 struct inpcb *inp;
991 struct udpcb *up;
992 int error;
993
994 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
995 inp = sotoinpcb(so);
996 KASSERT(inp == NULL, ("udp6_attach: inp != NULL"));
997
998 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
999 error = soreserve(so, udp_sendspace, udp_recvspace);
1000 if (error)
1001 return (error);
1002 }
1003 error = in_pcballoc(so, pcbinfo);
1004 if (error)
1005 return (error);
1006 inp = (struct inpcb *)so->so_pcb;
1007 inp->in6p_cksum = -1; /* just to be sure */
1008 /*
1009 * XXX: ugly!!
1010 * IPv4 TTL initialization is necessary for an IPv6 socket as well,
1011 * because the socket may be bound to an IPv6 wildcard address,
1012 * which may match an IPv4-mapped IPv6 address.
1013 */
1014 inp->inp_ip_ttl = V_ip_defttl;
1015 up = intoudpcb(inp);
1016 bzero(&up->u_start_zero, u_zero_size);
1017 INP_WUNLOCK(inp);
1018 return (0);
1019 }
1020
1021 static int
1022 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
1023 {
1024 struct inpcb *inp;
1025 struct inpcbinfo *pcbinfo;
1026 int error;
1027 u_char vflagsav;
1028
1029 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1030 inp = sotoinpcb(so);
1031 KASSERT(inp != NULL, ("udp6_bind: inp == NULL"));
1032
1033 if (nam->sa_family != AF_INET6)
1034 return (EAFNOSUPPORT);
1035 if (nam->sa_len != sizeof(struct sockaddr_in6))
1036 return (EINVAL);
1037
1038 INP_WLOCK(inp);
1039 INP_HASH_WLOCK(pcbinfo);
1040 vflagsav = inp->inp_vflag;
1041 inp->inp_vflag &= ~INP_IPV4;
1042 inp->inp_vflag |= INP_IPV6;
1043 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
1044 struct sockaddr_in6 *sin6_p;
1045
1046 sin6_p = (struct sockaddr_in6 *)nam;
1047
1048 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
1049 inp->inp_vflag |= INP_IPV4;
1050 #ifdef INET
1051 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
1052 struct sockaddr_in sin;
1053
1054 in6_sin6_2_sin(&sin, sin6_p);
1055 inp->inp_vflag |= INP_IPV4;
1056 inp->inp_vflag &= ~INP_IPV6;
1057 error = in_pcbbind(inp, (struct sockaddr *)&sin,
1058 td->td_ucred);
1059 goto out;
1060 }
1061 #endif
1062 }
1063
1064 error = in6_pcbbind(inp, nam, td->td_ucred);
1065 #ifdef INET
1066 out:
1067 #endif
1068 if (error != 0)
1069 inp->inp_vflag = vflagsav;
1070 INP_HASH_WUNLOCK(pcbinfo);
1071 INP_WUNLOCK(inp);
1072 return (error);
1073 }
1074
1075 static void
1076 udp6_close(struct socket *so)
1077 {
1078 struct inpcb *inp;
1079 struct inpcbinfo *pcbinfo;
1080
1081 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1082 inp = sotoinpcb(so);
1083 KASSERT(inp != NULL, ("udp6_close: inp == NULL"));
1084
1085 INP_WLOCK(inp);
1086 #ifdef INET
1087 if (inp->inp_vflag & INP_IPV4) {
1088 INP_WUNLOCK(inp);
1089 (void)udp_disconnect(so);
1090 return;
1091 }
1092 #endif
1093 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
1094 INP_HASH_WLOCK(pcbinfo);
1095 in6_pcbdisconnect(inp);
1096 inp->in6p_laddr = in6addr_any;
1097 INP_HASH_WUNLOCK(pcbinfo);
1098 soisdisconnected(so);
1099 }
1100 INP_WUNLOCK(inp);
1101 }
1102
1103 static int
1104 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
1105 {
1106 #ifdef INET
1107 struct epoch_tracker et;
1108 #endif
1109 struct inpcb *inp;
1110 struct inpcbinfo *pcbinfo;
1111 struct sockaddr_in6 *sin6;
1112 int error;
1113 u_char vflagsav;
1114
1115 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1116 inp = sotoinpcb(so);
1117 KASSERT(inp != NULL, ("udp6_connect: inp == NULL"));
1118
1119 sin6 = (struct sockaddr_in6 *)nam;
1120 if (sin6->sin6_family != AF_INET6)
1121 return (EAFNOSUPPORT);
1122 if (sin6->sin6_len != sizeof(*sin6))
1123 return (EINVAL);
1124
1125 /*
1126 * XXXRW: Need to clarify locking of v4/v6 flags.
1127 */
1128 INP_WLOCK(inp);
1129 #ifdef INET
1130 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
1131 struct sockaddr_in sin;
1132
1133 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) {
1134 error = EINVAL;
1135 goto out;
1136 }
1137 if ((inp->inp_vflag & INP_IPV4) == 0) {
1138 error = EAFNOSUPPORT;
1139 goto out;
1140 }
1141 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1142 error = EISCONN;
1143 goto out;
1144 }
1145 in6_sin6_2_sin(&sin, sin6);
1146 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr);
1147 if (error != 0)
1148 goto out;
1149 vflagsav = inp->inp_vflag;
1150 inp->inp_vflag |= INP_IPV4;
1151 inp->inp_vflag &= ~INP_IPV6;
1152 NET_EPOCH_ENTER(et);
1153 INP_HASH_WLOCK(pcbinfo);
1154 error = in_pcbconnect(inp, (struct sockaddr *)&sin,
1155 td->td_ucred, true);
1156 INP_HASH_WUNLOCK(pcbinfo);
1157 NET_EPOCH_EXIT(et);
1158 /*
1159 * If connect succeeds, mark socket as connected. If
1160 * connect fails and socket is unbound, reset inp_vflag
1161 * field.
1162 */
1163 if (error == 0)
1164 soisconnected(so);
1165 else if (inp->inp_laddr.s_addr == INADDR_ANY &&
1166 inp->inp_lport == 0)
1167 inp->inp_vflag = vflagsav;
1168 goto out;
1169 } else {
1170 if ((inp->inp_vflag & INP_IPV6) == 0) {
1171 error = EAFNOSUPPORT;
1172 goto out;
1173 }
1174 }
1175 #endif
1176 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
1177 error = EISCONN;
1178 goto out;
1179 }
1180 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr);
1181 if (error != 0)
1182 goto out;
1183 vflagsav = inp->inp_vflag;
1184 inp->inp_vflag &= ~INP_IPV4;
1185 inp->inp_vflag |= INP_IPV6;
1186 INP_HASH_WLOCK(pcbinfo);
1187 error = in6_pcbconnect(inp, nam, td->td_ucred);
1188 INP_HASH_WUNLOCK(pcbinfo);
1189 /*
1190 * If connect succeeds, mark socket as connected. If
1191 * connect fails and socket is unbound, reset inp_vflag
1192 * field.
1193 */
1194 if (error == 0)
1195 soisconnected(so);
1196 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
1197 inp->inp_lport == 0)
1198 inp->inp_vflag = vflagsav;
1199 out:
1200 INP_WUNLOCK(inp);
1201 return (error);
1202 }
1203
1204 static void
1205 udp6_detach(struct socket *so)
1206 {
1207 struct inpcb *inp;
1208
1209 inp = sotoinpcb(so);
1210 KASSERT(inp != NULL, ("udp6_detach: inp == NULL"));
1211
1212 INP_WLOCK(inp);
1213 in_pcbdetach(inp);
1214 in_pcbfree(inp);
1215 }
1216
1217 static int
1218 udp6_disconnect(struct socket *so)
1219 {
1220 struct inpcb *inp;
1221 struct inpcbinfo *pcbinfo;
1222
1223 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1224 inp = sotoinpcb(so);
1225 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL"));
1226
1227 INP_WLOCK(inp);
1228 #ifdef INET
1229 if (inp->inp_vflag & INP_IPV4) {
1230 INP_WUNLOCK(inp);
1231 (void)udp_disconnect(so);
1232 return (0);
1233 }
1234 #endif
1235
1236 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
1237 INP_WUNLOCK(inp);
1238 return (ENOTCONN);
1239 }
1240
1241 INP_HASH_WLOCK(pcbinfo);
1242 in6_pcbdisconnect(inp);
1243 inp->in6p_laddr = in6addr_any;
1244 INP_HASH_WUNLOCK(pcbinfo);
1245 SOCK_LOCK(so);
1246 so->so_state &= ~SS_ISCONNECTED; /* XXX */
1247 SOCK_UNLOCK(so);
1248 INP_WUNLOCK(inp);
1249 return (0);
1250 }
1251
1252 #define UDP6_PROTOSW \
1253 .pr_type = SOCK_DGRAM, \
1254 .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, \
1255 .pr_ctloutput = ip6_ctloutput, \
1256 .pr_abort = udp6_abort, \
1257 .pr_attach = udp6_attach, \
1258 .pr_bind = udp6_bind, \
1259 .pr_connect = udp6_connect, \
1260 .pr_control = in6_control, \
1261 .pr_detach = udp6_detach, \
1262 .pr_disconnect = udp6_disconnect, \
1263 .pr_peeraddr = in6_mapped_peeraddr, \
1264 .pr_send = udp6_send, \
1265 .pr_shutdown = udp_shutdown, \
1266 .pr_sockaddr = in6_mapped_sockaddr, \
1267 .pr_soreceive = soreceive_dgram, \
1268 .pr_sosend = sosend_dgram, \
1269 .pr_sosetlabel = in_pcbsosetlabel, \
1270 .pr_close = udp6_close
1271
1272 struct protosw udp6_protosw = {
1273 .pr_protocol = IPPROTO_UDP,
1274 UDP6_PROTOSW
1275 };
1276
1277 struct protosw udplite6_protosw = {
1278 .pr_protocol = IPPROTO_UDPLITE,
1279 UDP6_PROTOSW
1280 };
1281
1282 static void
1283 udp6_init(void *arg __unused)
1284 {
1285
1286 IP6PROTO_REGISTER(IPPROTO_UDP, udp6_input, udp6_ctlinput);
1287 IP6PROTO_REGISTER(IPPROTO_UDPLITE, udp6_input, udplite6_ctlinput);
1288 }
1289 SYSINIT(udp6_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, udp6_init, NULL);
Cache object: a1a7320aa1ff70cae243431884aadf8f
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