1/*-
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * Copyright (c) 2010-2011 Juniper Networks, Inc.
4 * All rights reserved.
5 *
6 * Portions of this software were developed by Robert N. M. Watson under
7 * contract to Juniper Networks, Inc.
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 * $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $
34 * $KAME: udp6_output.c,v 1.31 2001/05/21 16:39:15 jinmei Exp $
35 */
36
37/*-
38 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
39 * The Regents of the University of California.
40 * All rights reserved.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
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_usrreq.c 8.6 (Berkeley) 5/23/95
67 */
68
69#include <sys/cdefs.h>
| 1/*-
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * Copyright (c) 2010-2011 Juniper Networks, Inc.
4 * All rights reserved.
5 *
6 * Portions of this software were developed by Robert N. M. Watson under
7 * contract to Juniper Networks, Inc.
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 * $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $
34 * $KAME: udp6_output.c,v 1.31 2001/05/21 16:39:15 jinmei Exp $
35 */
36
37/*-
38 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
39 * The Regents of the University of California.
40 * All rights reserved.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
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_usrreq.c 8.6 (Berkeley) 5/23/95
67 */
68
69#include <sys/cdefs.h>
|
70__FBSDID("$FreeBSD: head/sys/netinet6/udp6_usrreq.c 253571 2013-07-23 14:14:24Z ae $");
| 70__FBSDID("$FreeBSD: head/sys/netinet6/udp6_usrreq.c 254889 2013-08-25 21:54:41Z markj $");
|
71
72#include "opt_inet.h"
73#include "opt_inet6.h"
74#include "opt_ipfw.h"
75#include "opt_ipsec.h"
| 71
72#include "opt_inet.h"
73#include "opt_inet6.h"
74#include "opt_ipfw.h"
75#include "opt_ipsec.h"
|
| 76#include "opt_kdtrace.h"
|
76
77#include <sys/param.h>
78#include <sys/jail.h>
79#include <sys/kernel.h>
80#include <sys/lock.h>
81#include <sys/mbuf.h>
82#include <sys/priv.h>
83#include <sys/proc.h>
84#include <sys/protosw.h>
| 77
78#include <sys/param.h>
79#include <sys/jail.h>
80#include <sys/kernel.h>
81#include <sys/lock.h>
82#include <sys/mbuf.h>
83#include <sys/priv.h>
84#include <sys/proc.h>
85#include <sys/protosw.h>
|
| 86#include <sys/sdt.h>
|
85#include <sys/signalvar.h>
86#include <sys/socket.h>
87#include <sys/socketvar.h>
88#include <sys/sx.h>
89#include <sys/sysctl.h>
90#include <sys/syslog.h>
91#include <sys/systm.h>
92
93#include <net/if.h>
94#include <net/if_types.h>
95#include <net/route.h>
96
97#include <netinet/in.h>
| 87#include <sys/signalvar.h>
88#include <sys/socket.h>
89#include <sys/socketvar.h>
90#include <sys/sx.h>
91#include <sys/sysctl.h>
92#include <sys/syslog.h>
93#include <sys/systm.h>
94
95#include <net/if.h>
96#include <net/if_types.h>
97#include <net/route.h>
98
99#include <netinet/in.h>
|
| 100#include <netinet/in_kdtrace.h>
|
98#include <netinet/in_pcb.h>
99#include <netinet/in_systm.h>
100#include <netinet/in_var.h>
101#include <netinet/ip.h>
102#include <netinet/ip_icmp.h>
103#include <netinet/ip6.h>
104#include <netinet/icmp_var.h>
105#include <netinet/icmp6.h>
106#include <netinet/ip_var.h>
107#include <netinet/udp.h>
108#include <netinet/udp_var.h>
109
110#include <netinet6/ip6protosw.h>
111#include <netinet6/ip6_var.h>
112#include <netinet6/in6_pcb.h>
113#include <netinet6/udp6_var.h>
114#include <netinet6/scope6_var.h>
115
116#ifdef IPSEC
117#include <netipsec/ipsec.h>
118#include <netipsec/ipsec6.h>
119#endif /* IPSEC */
120
121#include <security/mac/mac_framework.h>
122
123/*
124 * UDP protocol implementation.
125 * Per RFC 768, August, 1980.
126 */
127
128extern struct protosw inetsw[];
129static void udp6_detach(struct socket *so);
130
131static void
132udp6_append(struct inpcb *inp, struct mbuf *n, int off,
133 struct sockaddr_in6 *fromsa)
134{
135 struct socket *so;
136 struct mbuf *opts;
137
138 INP_LOCK_ASSERT(inp);
139
140#ifdef IPSEC
141 /* Check AH/ESP integrity. */
142 if (ipsec6_in_reject(n, inp)) {
143 m_freem(n);
144 IPSEC6STAT_INC(ips_in_polvio);
145 return;
146 }
147#endif /* IPSEC */
148#ifdef MAC
149 if (mac_inpcb_check_deliver(inp, n) != 0) {
150 m_freem(n);
151 return;
152 }
153#endif
154 opts = NULL;
155 if (inp->inp_flags & INP_CONTROLOPTS ||
156 inp->inp_socket->so_options & SO_TIMESTAMP)
157 ip6_savecontrol(inp, n, &opts);
158 m_adj(n, off + sizeof(struct udphdr));
159
160 so = inp->inp_socket;
161 SOCKBUF_LOCK(&so->so_rcv);
162 if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)fromsa, n,
163 opts) == 0) {
164 SOCKBUF_UNLOCK(&so->so_rcv);
165 m_freem(n);
166 if (opts)
167 m_freem(opts);
168 UDPSTAT_INC(udps_fullsock);
169 } else
170 sorwakeup_locked(so);
171}
172
173int
174udp6_input(struct mbuf **mp, int *offp, int proto)
175{
176 struct mbuf *m = *mp;
177 struct ifnet *ifp;
178 struct ip6_hdr *ip6;
179 struct udphdr *uh;
180 struct inpcb *inp;
181 struct udpcb *up;
182 int off = *offp;
183 int plen, ulen;
184 struct sockaddr_in6 fromsa;
185 struct m_tag *fwd_tag;
186 uint16_t uh_sum;
187
188 ifp = m->m_pkthdr.rcvif;
189 ip6 = mtod(m, struct ip6_hdr *);
190
191 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
192 /* XXX send icmp6 host/port unreach? */
193 m_freem(m);
194 return (IPPROTO_DONE);
195 }
196
197#ifndef PULLDOWN_TEST
198 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
199 ip6 = mtod(m, struct ip6_hdr *);
200 uh = (struct udphdr *)((caddr_t)ip6 + off);
201#else
202 IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh));
203 if (!uh)
204 return (IPPROTO_DONE);
205#endif
206
207 UDPSTAT_INC(udps_ipackets);
208
209 /*
210 * Destination port of 0 is illegal, based on RFC768.
211 */
212 if (uh->uh_dport == 0)
213 goto badunlocked;
214
215 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
216 ulen = ntohs((u_short)uh->uh_ulen);
217
218 if (plen != ulen) {
219 UDPSTAT_INC(udps_badlen);
220 goto badunlocked;
221 }
222
223 /*
224 * Checksum extended UDP header and data.
225 */
226 if (uh->uh_sum == 0) {
227 UDPSTAT_INC(udps_nosum);
228 goto badunlocked;
229 }
230
231 if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) {
232 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
233 uh_sum = m->m_pkthdr.csum_data;
234 else
235 uh_sum = in6_cksum_pseudo(ip6, ulen,
236 IPPROTO_UDP, m->m_pkthdr.csum_data);
237 uh_sum ^= 0xffff;
238 } else
239 uh_sum = in6_cksum(m, IPPROTO_UDP, off, ulen);
240
241 if (uh_sum != 0) {
242 UDPSTAT_INC(udps_badsum);
243 goto badunlocked;
244 }
245
246 /*
247 * Construct sockaddr format source address.
248 */
249 init_sin6(&fromsa, m);
250 fromsa.sin6_port = uh->uh_sport;
251
252 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
253 struct inpcb *last;
254 struct ip6_moptions *imo;
255
256 INP_INFO_RLOCK(&V_udbinfo);
257 /*
258 * In the event that laddr should be set to the link-local
259 * address (this happens in RIPng), the multicast address
260 * specified in the received packet will not match laddr. To
261 * handle this situation, matching is relaxed if the
262 * receiving interface is the same as one specified in the
263 * socket and if the destination multicast address matches
264 * one of the multicast groups specified in the socket.
265 */
266
267 /*
268 * KAME note: traditionally we dropped udpiphdr from mbuf
269 * here. We need udphdr for IPsec processing so we do that
270 * later.
271 */
272 last = NULL;
273 LIST_FOREACH(inp, &V_udb, inp_list) {
274 if ((inp->inp_vflag & INP_IPV6) == 0)
275 continue;
276 if (inp->inp_lport != uh->uh_dport)
277 continue;
278 if (inp->inp_fport != 0 &&
279 inp->inp_fport != uh->uh_sport)
280 continue;
281 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
282 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
283 &ip6->ip6_dst))
284 continue;
285 }
286 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
287 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
288 &ip6->ip6_src) ||
289 inp->inp_fport != uh->uh_sport)
290 continue;
291 }
292
293 /*
294 * XXXRW: Because we weren't holding either the inpcb
295 * or the hash lock when we checked for a match
296 * before, we should probably recheck now that the
297 * inpcb lock is (supposed to be) held.
298 */
299
300 /*
301 * Handle socket delivery policy for any-source
302 * and source-specific multicast. [RFC3678]
303 */
304 imo = inp->in6p_moptions;
305 if (imo && IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
306 struct sockaddr_in6 mcaddr;
307 int blocked;
308
309 INP_RLOCK(inp);
310
311 bzero(&mcaddr, sizeof(struct sockaddr_in6));
312 mcaddr.sin6_len = sizeof(struct sockaddr_in6);
313 mcaddr.sin6_family = AF_INET6;
314 mcaddr.sin6_addr = ip6->ip6_dst;
315
316 blocked = im6o_mc_filter(imo, ifp,
317 (struct sockaddr *)&mcaddr,
318 (struct sockaddr *)&fromsa);
319 if (blocked != MCAST_PASS) {
320 if (blocked == MCAST_NOTGMEMBER)
321 IP6STAT_INC(ip6s_notmember);
322 if (blocked == MCAST_NOTSMEMBER ||
323 blocked == MCAST_MUTED)
324 UDPSTAT_INC(udps_filtermcast);
325 INP_RUNLOCK(inp); /* XXX */
326 continue;
327 }
328
329 INP_RUNLOCK(inp);
330 }
331 if (last != NULL) {
332 struct mbuf *n;
333
334 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
335 INP_RLOCK(last);
336 up = intoudpcb(last);
337 if (up->u_tun_func == NULL) {
338 udp6_append(last, n, off, &fromsa);
339 } else {
340 /*
341 * Engage the tunneling
342 * protocol we will have to
343 * leave the info_lock up,
344 * since we are hunting
345 * through multiple UDP's.
346 *
347 */
348 (*up->u_tun_func)(n, off, last);
349 }
350 INP_RUNLOCK(last);
351 }
352 }
353 last = inp;
354 /*
355 * Don't look for additional matches if this one does
356 * not have either the SO_REUSEPORT or SO_REUSEADDR
357 * socket options set. This heuristic avoids
358 * searching through all pcbs in the common case of a
359 * non-shared port. It assumes that an application
360 * will never clear these options after setting them.
361 */
362 if ((last->inp_socket->so_options &
363 (SO_REUSEPORT|SO_REUSEADDR)) == 0)
364 break;
365 }
366
367 if (last == NULL) {
368 /*
369 * No matching pcb found; discard datagram. (No need
370 * to send an ICMP Port Unreachable for a broadcast
371 * or multicast datgram.)
372 */
373 UDPSTAT_INC(udps_noport);
374 UDPSTAT_INC(udps_noportmcast);
375 goto badheadlocked;
376 }
377 INP_RLOCK(last);
378 INP_INFO_RUNLOCK(&V_udbinfo);
379 up = intoudpcb(last);
| 101#include <netinet/in_pcb.h>
102#include <netinet/in_systm.h>
103#include <netinet/in_var.h>
104#include <netinet/ip.h>
105#include <netinet/ip_icmp.h>
106#include <netinet/ip6.h>
107#include <netinet/icmp_var.h>
108#include <netinet/icmp6.h>
109#include <netinet/ip_var.h>
110#include <netinet/udp.h>
111#include <netinet/udp_var.h>
112
113#include <netinet6/ip6protosw.h>
114#include <netinet6/ip6_var.h>
115#include <netinet6/in6_pcb.h>
116#include <netinet6/udp6_var.h>
117#include <netinet6/scope6_var.h>
118
119#ifdef IPSEC
120#include <netipsec/ipsec.h>
121#include <netipsec/ipsec6.h>
122#endif /* IPSEC */
123
124#include <security/mac/mac_framework.h>
125
126/*
127 * UDP protocol implementation.
128 * Per RFC 768, August, 1980.
129 */
130
131extern struct protosw inetsw[];
132static void udp6_detach(struct socket *so);
133
134static void
135udp6_append(struct inpcb *inp, struct mbuf *n, int off,
136 struct sockaddr_in6 *fromsa)
137{
138 struct socket *so;
139 struct mbuf *opts;
140
141 INP_LOCK_ASSERT(inp);
142
143#ifdef IPSEC
144 /* Check AH/ESP integrity. */
145 if (ipsec6_in_reject(n, inp)) {
146 m_freem(n);
147 IPSEC6STAT_INC(ips_in_polvio);
148 return;
149 }
150#endif /* IPSEC */
151#ifdef MAC
152 if (mac_inpcb_check_deliver(inp, n) != 0) {
153 m_freem(n);
154 return;
155 }
156#endif
157 opts = NULL;
158 if (inp->inp_flags & INP_CONTROLOPTS ||
159 inp->inp_socket->so_options & SO_TIMESTAMP)
160 ip6_savecontrol(inp, n, &opts);
161 m_adj(n, off + sizeof(struct udphdr));
162
163 so = inp->inp_socket;
164 SOCKBUF_LOCK(&so->so_rcv);
165 if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)fromsa, n,
166 opts) == 0) {
167 SOCKBUF_UNLOCK(&so->so_rcv);
168 m_freem(n);
169 if (opts)
170 m_freem(opts);
171 UDPSTAT_INC(udps_fullsock);
172 } else
173 sorwakeup_locked(so);
174}
175
176int
177udp6_input(struct mbuf **mp, int *offp, int proto)
178{
179 struct mbuf *m = *mp;
180 struct ifnet *ifp;
181 struct ip6_hdr *ip6;
182 struct udphdr *uh;
183 struct inpcb *inp;
184 struct udpcb *up;
185 int off = *offp;
186 int plen, ulen;
187 struct sockaddr_in6 fromsa;
188 struct m_tag *fwd_tag;
189 uint16_t uh_sum;
190
191 ifp = m->m_pkthdr.rcvif;
192 ip6 = mtod(m, struct ip6_hdr *);
193
194 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
195 /* XXX send icmp6 host/port unreach? */
196 m_freem(m);
197 return (IPPROTO_DONE);
198 }
199
200#ifndef PULLDOWN_TEST
201 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
202 ip6 = mtod(m, struct ip6_hdr *);
203 uh = (struct udphdr *)((caddr_t)ip6 + off);
204#else
205 IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh));
206 if (!uh)
207 return (IPPROTO_DONE);
208#endif
209
210 UDPSTAT_INC(udps_ipackets);
211
212 /*
213 * Destination port of 0 is illegal, based on RFC768.
214 */
215 if (uh->uh_dport == 0)
216 goto badunlocked;
217
218 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
219 ulen = ntohs((u_short)uh->uh_ulen);
220
221 if (plen != ulen) {
222 UDPSTAT_INC(udps_badlen);
223 goto badunlocked;
224 }
225
226 /*
227 * Checksum extended UDP header and data.
228 */
229 if (uh->uh_sum == 0) {
230 UDPSTAT_INC(udps_nosum);
231 goto badunlocked;
232 }
233
234 if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) {
235 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
236 uh_sum = m->m_pkthdr.csum_data;
237 else
238 uh_sum = in6_cksum_pseudo(ip6, ulen,
239 IPPROTO_UDP, m->m_pkthdr.csum_data);
240 uh_sum ^= 0xffff;
241 } else
242 uh_sum = in6_cksum(m, IPPROTO_UDP, off, ulen);
243
244 if (uh_sum != 0) {
245 UDPSTAT_INC(udps_badsum);
246 goto badunlocked;
247 }
248
249 /*
250 * Construct sockaddr format source address.
251 */
252 init_sin6(&fromsa, m);
253 fromsa.sin6_port = uh->uh_sport;
254
255 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
256 struct inpcb *last;
257 struct ip6_moptions *imo;
258
259 INP_INFO_RLOCK(&V_udbinfo);
260 /*
261 * In the event that laddr should be set to the link-local
262 * address (this happens in RIPng), the multicast address
263 * specified in the received packet will not match laddr. To
264 * handle this situation, matching is relaxed if the
265 * receiving interface is the same as one specified in the
266 * socket and if the destination multicast address matches
267 * one of the multicast groups specified in the socket.
268 */
269
270 /*
271 * KAME note: traditionally we dropped udpiphdr from mbuf
272 * here. We need udphdr for IPsec processing so we do that
273 * later.
274 */
275 last = NULL;
276 LIST_FOREACH(inp, &V_udb, inp_list) {
277 if ((inp->inp_vflag & INP_IPV6) == 0)
278 continue;
279 if (inp->inp_lport != uh->uh_dport)
280 continue;
281 if (inp->inp_fport != 0 &&
282 inp->inp_fport != uh->uh_sport)
283 continue;
284 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
285 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
286 &ip6->ip6_dst))
287 continue;
288 }
289 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
290 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
291 &ip6->ip6_src) ||
292 inp->inp_fport != uh->uh_sport)
293 continue;
294 }
295
296 /*
297 * XXXRW: Because we weren't holding either the inpcb
298 * or the hash lock when we checked for a match
299 * before, we should probably recheck now that the
300 * inpcb lock is (supposed to be) held.
301 */
302
303 /*
304 * Handle socket delivery policy for any-source
305 * and source-specific multicast. [RFC3678]
306 */
307 imo = inp->in6p_moptions;
308 if (imo && IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
309 struct sockaddr_in6 mcaddr;
310 int blocked;
311
312 INP_RLOCK(inp);
313
314 bzero(&mcaddr, sizeof(struct sockaddr_in6));
315 mcaddr.sin6_len = sizeof(struct sockaddr_in6);
316 mcaddr.sin6_family = AF_INET6;
317 mcaddr.sin6_addr = ip6->ip6_dst;
318
319 blocked = im6o_mc_filter(imo, ifp,
320 (struct sockaddr *)&mcaddr,
321 (struct sockaddr *)&fromsa);
322 if (blocked != MCAST_PASS) {
323 if (blocked == MCAST_NOTGMEMBER)
324 IP6STAT_INC(ip6s_notmember);
325 if (blocked == MCAST_NOTSMEMBER ||
326 blocked == MCAST_MUTED)
327 UDPSTAT_INC(udps_filtermcast);
328 INP_RUNLOCK(inp); /* XXX */
329 continue;
330 }
331
332 INP_RUNLOCK(inp);
333 }
334 if (last != NULL) {
335 struct mbuf *n;
336
337 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
338 INP_RLOCK(last);
339 up = intoudpcb(last);
340 if (up->u_tun_func == NULL) {
341 udp6_append(last, n, off, &fromsa);
342 } else {
343 /*
344 * Engage the tunneling
345 * protocol we will have to
346 * leave the info_lock up,
347 * since we are hunting
348 * through multiple UDP's.
349 *
350 */
351 (*up->u_tun_func)(n, off, last);
352 }
353 INP_RUNLOCK(last);
354 }
355 }
356 last = inp;
357 /*
358 * Don't look for additional matches if this one does
359 * not have either the SO_REUSEPORT or SO_REUSEADDR
360 * socket options set. This heuristic avoids
361 * searching through all pcbs in the common case of a
362 * non-shared port. It assumes that an application
363 * will never clear these options after setting them.
364 */
365 if ((last->inp_socket->so_options &
366 (SO_REUSEPORT|SO_REUSEADDR)) == 0)
367 break;
368 }
369
370 if (last == NULL) {
371 /*
372 * No matching pcb found; discard datagram. (No need
373 * to send an ICMP Port Unreachable for a broadcast
374 * or multicast datgram.)
375 */
376 UDPSTAT_INC(udps_noport);
377 UDPSTAT_INC(udps_noportmcast);
378 goto badheadlocked;
379 }
380 INP_RLOCK(last);
381 INP_INFO_RUNLOCK(&V_udbinfo);
382 up = intoudpcb(last);
|
| 383 UDP_PROBE(receive, NULL, last, ip6, last, uh);
|
380 if (up->u_tun_func == NULL) {
381 udp6_append(last, m, off, &fromsa);
382 } else {
383 /*
384 * Engage the tunneling protocol.
385 */
386 (*up->u_tun_func)(m, off, last);
387 }
388 INP_RUNLOCK(last);
389 return (IPPROTO_DONE);
390 }
391 /*
392 * Locate pcb for datagram.
393 */
394
395 /*
396 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
397 */
398 if ((m->m_flags & M_IP6_NEXTHOP) &&
399 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
400 struct sockaddr_in6 *next_hop6;
401
402 next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1);
403
404 /*
405 * Transparently forwarded. Pretend to be the destination.
406 * Already got one like this?
407 */
408 inp = in6_pcblookup_mbuf(&V_udbinfo,
409 &ip6->ip6_src, uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
410 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m);
411 if (!inp) {
412 /*
413 * It's new. Try to find the ambushing socket.
414 * Because we've rewritten the destination address,
415 * any hardware-generated hash is ignored.
416 */
417 inp = in6_pcblookup(&V_udbinfo, &ip6->ip6_src,
418 uh->uh_sport, &next_hop6->sin6_addr,
419 next_hop6->sin6_port ? htons(next_hop6->sin6_port) :
420 uh->uh_dport, INPLOOKUP_WILDCARD |
421 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif);
422 }
423 /* Remove the tag from the packet. We don't need it anymore. */
424 m_tag_delete(m, fwd_tag);
425 m->m_flags &= ~M_IP6_NEXTHOP;
426 } else
427 inp = in6_pcblookup_mbuf(&V_udbinfo, &ip6->ip6_src,
428 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
429 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB,
430 m->m_pkthdr.rcvif, m);
431 if (inp == NULL) {
432 if (udp_log_in_vain) {
433 char ip6bufs[INET6_ADDRSTRLEN];
434 char ip6bufd[INET6_ADDRSTRLEN];
435
436 log(LOG_INFO,
437 "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
438 ip6_sprintf(ip6bufd, &ip6->ip6_dst),
439 ntohs(uh->uh_dport),
440 ip6_sprintf(ip6bufs, &ip6->ip6_src),
441 ntohs(uh->uh_sport));
442 }
443 UDPSTAT_INC(udps_noport);
444 if (m->m_flags & M_MCAST) {
445 printf("UDP6: M_MCAST is set in a unicast packet.\n");
446 UDPSTAT_INC(udps_noportmcast);
447 goto badunlocked;
448 }
449 if (V_udp_blackhole)
450 goto badunlocked;
451 if (badport_bandlim(BANDLIM_ICMP6_UNREACH) < 0)
452 goto badunlocked;
453 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
454 return (IPPROTO_DONE);
455 }
456 INP_RLOCK_ASSERT(inp);
457 up = intoudpcb(inp);
| 384 if (up->u_tun_func == NULL) {
385 udp6_append(last, m, off, &fromsa);
386 } else {
387 /*
388 * Engage the tunneling protocol.
389 */
390 (*up->u_tun_func)(m, off, last);
391 }
392 INP_RUNLOCK(last);
393 return (IPPROTO_DONE);
394 }
395 /*
396 * Locate pcb for datagram.
397 */
398
399 /*
400 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
401 */
402 if ((m->m_flags & M_IP6_NEXTHOP) &&
403 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
404 struct sockaddr_in6 *next_hop6;
405
406 next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1);
407
408 /*
409 * Transparently forwarded. Pretend to be the destination.
410 * Already got one like this?
411 */
412 inp = in6_pcblookup_mbuf(&V_udbinfo,
413 &ip6->ip6_src, uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
414 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m);
415 if (!inp) {
416 /*
417 * It's new. Try to find the ambushing socket.
418 * Because we've rewritten the destination address,
419 * any hardware-generated hash is ignored.
420 */
421 inp = in6_pcblookup(&V_udbinfo, &ip6->ip6_src,
422 uh->uh_sport, &next_hop6->sin6_addr,
423 next_hop6->sin6_port ? htons(next_hop6->sin6_port) :
424 uh->uh_dport, INPLOOKUP_WILDCARD |
425 INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif);
426 }
427 /* Remove the tag from the packet. We don't need it anymore. */
428 m_tag_delete(m, fwd_tag);
429 m->m_flags &= ~M_IP6_NEXTHOP;
430 } else
431 inp = in6_pcblookup_mbuf(&V_udbinfo, &ip6->ip6_src,
432 uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
433 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB,
434 m->m_pkthdr.rcvif, m);
435 if (inp == NULL) {
436 if (udp_log_in_vain) {
437 char ip6bufs[INET6_ADDRSTRLEN];
438 char ip6bufd[INET6_ADDRSTRLEN];
439
440 log(LOG_INFO,
441 "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
442 ip6_sprintf(ip6bufd, &ip6->ip6_dst),
443 ntohs(uh->uh_dport),
444 ip6_sprintf(ip6bufs, &ip6->ip6_src),
445 ntohs(uh->uh_sport));
446 }
447 UDPSTAT_INC(udps_noport);
448 if (m->m_flags & M_MCAST) {
449 printf("UDP6: M_MCAST is set in a unicast packet.\n");
450 UDPSTAT_INC(udps_noportmcast);
451 goto badunlocked;
452 }
453 if (V_udp_blackhole)
454 goto badunlocked;
455 if (badport_bandlim(BANDLIM_ICMP6_UNREACH) < 0)
456 goto badunlocked;
457 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
458 return (IPPROTO_DONE);
459 }
460 INP_RLOCK_ASSERT(inp);
461 up = intoudpcb(inp);
|
| 462 UDP_PROBE(receive, NULL, inp, ip6, inp, uh);
|
458 if (up->u_tun_func == NULL) {
459 udp6_append(inp, m, off, &fromsa);
460 } else {
461 /*
462 * Engage the tunneling protocol.
463 */
464
465 (*up->u_tun_func)(m, off, inp);
466 }
467 INP_RUNLOCK(inp);
468 return (IPPROTO_DONE);
469
470badheadlocked:
471 INP_INFO_RUNLOCK(&V_udbinfo);
472badunlocked:
473 if (m)
474 m_freem(m);
475 return (IPPROTO_DONE);
476}
477
478void
479udp6_ctlinput(int cmd, struct sockaddr *sa, void *d)
480{
481 struct udphdr uh;
482 struct ip6_hdr *ip6;
483 struct mbuf *m;
484 int off = 0;
485 struct ip6ctlparam *ip6cp = NULL;
486 const struct sockaddr_in6 *sa6_src = NULL;
487 void *cmdarg;
488 struct inpcb *(*notify)(struct inpcb *, int) = udp_notify;
489 struct udp_portonly {
490 u_int16_t uh_sport;
491 u_int16_t uh_dport;
492 } *uhp;
493
494 if (sa->sa_family != AF_INET6 ||
495 sa->sa_len != sizeof(struct sockaddr_in6))
496 return;
497
498 if ((unsigned)cmd >= PRC_NCMDS)
499 return;
500 if (PRC_IS_REDIRECT(cmd))
501 notify = in6_rtchange, d = NULL;
502 else if (cmd == PRC_HOSTDEAD)
503 d = NULL;
504 else if (inet6ctlerrmap[cmd] == 0)
505 return;
506
507 /* if the parameter is from icmp6, decode it. */
508 if (d != NULL) {
509 ip6cp = (struct ip6ctlparam *)d;
510 m = ip6cp->ip6c_m;
511 ip6 = ip6cp->ip6c_ip6;
512 off = ip6cp->ip6c_off;
513 cmdarg = ip6cp->ip6c_cmdarg;
514 sa6_src = ip6cp->ip6c_src;
515 } else {
516 m = NULL;
517 ip6 = NULL;
518 cmdarg = NULL;
519 sa6_src = &sa6_any;
520 }
521
522 if (ip6) {
523 /*
524 * XXX: We assume that when IPV6 is non NULL,
525 * M and OFF are valid.
526 */
527
528 /* Check if we can safely examine src and dst ports. */
529 if (m->m_pkthdr.len < off + sizeof(*uhp))
530 return;
531
532 bzero(&uh, sizeof(uh));
533 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
534
535 (void) in6_pcbnotify(&V_udbinfo, sa, uh.uh_dport,
536 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, cmd,
537 cmdarg, notify);
538 } else
539 (void) in6_pcbnotify(&V_udbinfo, sa, 0,
540 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify);
541}
542
543static int
544udp6_getcred(SYSCTL_HANDLER_ARGS)
545{
546 struct xucred xuc;
547 struct sockaddr_in6 addrs[2];
548 struct inpcb *inp;
549 int error;
550
551 error = priv_check(req->td, PRIV_NETINET_GETCRED);
552 if (error)
553 return (error);
554
555 if (req->newlen != sizeof(addrs))
556 return (EINVAL);
557 if (req->oldlen != sizeof(struct xucred))
558 return (EINVAL);
559 error = SYSCTL_IN(req, addrs, sizeof(addrs));
560 if (error)
561 return (error);
562 if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 ||
563 (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) {
564 return (error);
565 }
566 inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr,
567 addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port,
568 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
569 if (inp != NULL) {
570 INP_RLOCK_ASSERT(inp);
571 if (inp->inp_socket == NULL)
572 error = ENOENT;
573 if (error == 0)
574 error = cr_canseesocket(req->td->td_ucred,
575 inp->inp_socket);
576 if (error == 0)
577 cru2x(inp->inp_cred, &xuc);
578 INP_RUNLOCK(inp);
579 } else
580 error = ENOENT;
581 if (error == 0)
582 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
583 return (error);
584}
585
586SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 0,
587 0, udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection");
588
589static int
590udp6_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr6,
591 struct mbuf *control, struct thread *td)
592{
593 u_int32_t ulen = m->m_pkthdr.len;
594 u_int32_t plen = sizeof(struct udphdr) + ulen;
595 struct ip6_hdr *ip6;
596 struct udphdr *udp6;
597 struct in6_addr *laddr, *faddr, in6a;
598 struct sockaddr_in6 *sin6 = NULL;
599 struct ifnet *oifp = NULL;
600 int scope_ambiguous = 0;
601 u_short fport;
602 int error = 0;
603 struct ip6_pktopts *optp, opt;
604 int af = AF_INET6, hlen = sizeof(struct ip6_hdr);
605 int flags;
606 struct sockaddr_in6 tmp;
607
608 INP_WLOCK_ASSERT(inp);
609 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
610
611 if (addr6) {
612 /* addr6 has been validated in udp6_send(). */
613 sin6 = (struct sockaddr_in6 *)addr6;
614
615 /* protect *sin6 from overwrites */
616 tmp = *sin6;
617 sin6 = &tmp;
618
619 /*
620 * Application should provide a proper zone ID or the use of
621 * default zone IDs should be enabled. Unfortunately, some
622 * applications do not behave as it should, so we need a
623 * workaround. Even if an appropriate ID is not determined,
624 * we'll see if we can determine the outgoing interface. If we
625 * can, determine the zone ID based on the interface below.
626 */
627 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
628 scope_ambiguous = 1;
629 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
630 return (error);
631 }
632
633 if (control) {
634 if ((error = ip6_setpktopts(control, &opt,
635 inp->in6p_outputopts, td->td_ucred, IPPROTO_UDP)) != 0)
636 goto release;
637 optp = &opt;
638 } else
639 optp = inp->in6p_outputopts;
640
641 if (sin6) {
642 faddr = &sin6->sin6_addr;
643
644 /*
645 * Since we saw no essential reason for calling in_pcbconnect,
646 * we get rid of such kind of logic, and call in6_selectsrc
647 * and in6_pcbsetport in order to fill in the local address
648 * and the local port.
649 */
650 if (sin6->sin6_port == 0) {
651 error = EADDRNOTAVAIL;
652 goto release;
653 }
654
655 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
656 /* how about ::ffff:0.0.0.0 case? */
657 error = EISCONN;
658 goto release;
659 }
660
661 fport = sin6->sin6_port; /* allow 0 port */
662
663 if (IN6_IS_ADDR_V4MAPPED(faddr)) {
664 if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) {
665 /*
666 * I believe we should explicitly discard the
667 * packet when mapped addresses are disabled,
668 * rather than send the packet as an IPv6 one.
669 * If we chose the latter approach, the packet
670 * might be sent out on the wire based on the
671 * default route, the situation which we'd
672 * probably want to avoid.
673 * (20010421 jinmei@kame.net)
674 */
675 error = EINVAL;
676 goto release;
677 }
678 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
679 !IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) {
680 /*
681 * when remote addr is an IPv4-mapped address,
682 * local addr should not be an IPv6 address,
683 * since you cannot determine how to map IPv6
684 * source address to IPv4.
685 */
686 error = EINVAL;
687 goto release;
688 }
689
690 af = AF_INET;
691 }
692
693 if (!IN6_IS_ADDR_V4MAPPED(faddr)) {
694 error = in6_selectsrc(sin6, optp, inp, NULL,
695 td->td_ucred, &oifp, &in6a);
696 if (error)
697 goto release;
698 if (oifp && scope_ambiguous &&
699 (error = in6_setscope(&sin6->sin6_addr,
700 oifp, NULL))) {
701 goto release;
702 }
703 laddr = &in6a;
704 } else
705 laddr = &inp->in6p_laddr; /* XXX */
706 if (laddr == NULL) {
707 if (error == 0)
708 error = EADDRNOTAVAIL;
709 goto release;
710 }
711 if (inp->inp_lport == 0 &&
712 (error = in6_pcbsetport(laddr, inp, td->td_ucred)) != 0) {
713 /* Undo an address bind that may have occurred. */
714 inp->in6p_laddr = in6addr_any;
715 goto release;
716 }
717 } else {
718 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
719 error = ENOTCONN;
720 goto release;
721 }
722 if (IN6_IS_ADDR_V4MAPPED(&inp->in6p_faddr)) {
723 if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) {
724 /*
725 * XXX: this case would happen when the
726 * application sets the V6ONLY flag after
727 * connecting the foreign address.
728 * Such applications should be fixed,
729 * so we bark here.
730 */
731 log(LOG_INFO, "udp6_output: IPV6_V6ONLY "
732 "option was set for a connected socket\n");
733 error = EINVAL;
734 goto release;
735 } else
736 af = AF_INET;
737 }
738 laddr = &inp->in6p_laddr;
739 faddr = &inp->in6p_faddr;
740 fport = inp->inp_fport;
741 }
742
743 if (af == AF_INET)
744 hlen = sizeof(struct ip);
745
746 /*
747 * Calculate data length and get a mbuf
748 * for UDP and IP6 headers.
749 */
750 M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT);
751 if (m == 0) {
752 error = ENOBUFS;
753 goto release;
754 }
755
756 /*
757 * Stuff checksum and output datagram.
758 */
759 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen);
760 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */
761 udp6->uh_dport = fport;
762 if (plen <= 0xffff)
763 udp6->uh_ulen = htons((u_short)plen);
764 else
765 udp6->uh_ulen = 0;
766 udp6->uh_sum = 0;
767
768 switch (af) {
769 case AF_INET6:
770 ip6 = mtod(m, struct ip6_hdr *);
771 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK;
772 ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
773 ip6->ip6_vfc |= IPV6_VERSION;
| 463 if (up->u_tun_func == NULL) {
464 udp6_append(inp, m, off, &fromsa);
465 } else {
466 /*
467 * Engage the tunneling protocol.
468 */
469
470 (*up->u_tun_func)(m, off, inp);
471 }
472 INP_RUNLOCK(inp);
473 return (IPPROTO_DONE);
474
475badheadlocked:
476 INP_INFO_RUNLOCK(&V_udbinfo);
477badunlocked:
478 if (m)
479 m_freem(m);
480 return (IPPROTO_DONE);
481}
482
483void
484udp6_ctlinput(int cmd, struct sockaddr *sa, void *d)
485{
486 struct udphdr uh;
487 struct ip6_hdr *ip6;
488 struct mbuf *m;
489 int off = 0;
490 struct ip6ctlparam *ip6cp = NULL;
491 const struct sockaddr_in6 *sa6_src = NULL;
492 void *cmdarg;
493 struct inpcb *(*notify)(struct inpcb *, int) = udp_notify;
494 struct udp_portonly {
495 u_int16_t uh_sport;
496 u_int16_t uh_dport;
497 } *uhp;
498
499 if (sa->sa_family != AF_INET6 ||
500 sa->sa_len != sizeof(struct sockaddr_in6))
501 return;
502
503 if ((unsigned)cmd >= PRC_NCMDS)
504 return;
505 if (PRC_IS_REDIRECT(cmd))
506 notify = in6_rtchange, d = NULL;
507 else if (cmd == PRC_HOSTDEAD)
508 d = NULL;
509 else if (inet6ctlerrmap[cmd] == 0)
510 return;
511
512 /* if the parameter is from icmp6, decode it. */
513 if (d != NULL) {
514 ip6cp = (struct ip6ctlparam *)d;
515 m = ip6cp->ip6c_m;
516 ip6 = ip6cp->ip6c_ip6;
517 off = ip6cp->ip6c_off;
518 cmdarg = ip6cp->ip6c_cmdarg;
519 sa6_src = ip6cp->ip6c_src;
520 } else {
521 m = NULL;
522 ip6 = NULL;
523 cmdarg = NULL;
524 sa6_src = &sa6_any;
525 }
526
527 if (ip6) {
528 /*
529 * XXX: We assume that when IPV6 is non NULL,
530 * M and OFF are valid.
531 */
532
533 /* Check if we can safely examine src and dst ports. */
534 if (m->m_pkthdr.len < off + sizeof(*uhp))
535 return;
536
537 bzero(&uh, sizeof(uh));
538 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
539
540 (void) in6_pcbnotify(&V_udbinfo, sa, uh.uh_dport,
541 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, cmd,
542 cmdarg, notify);
543 } else
544 (void) in6_pcbnotify(&V_udbinfo, sa, 0,
545 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify);
546}
547
548static int
549udp6_getcred(SYSCTL_HANDLER_ARGS)
550{
551 struct xucred xuc;
552 struct sockaddr_in6 addrs[2];
553 struct inpcb *inp;
554 int error;
555
556 error = priv_check(req->td, PRIV_NETINET_GETCRED);
557 if (error)
558 return (error);
559
560 if (req->newlen != sizeof(addrs))
561 return (EINVAL);
562 if (req->oldlen != sizeof(struct xucred))
563 return (EINVAL);
564 error = SYSCTL_IN(req, addrs, sizeof(addrs));
565 if (error)
566 return (error);
567 if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 ||
568 (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) {
569 return (error);
570 }
571 inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr,
572 addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port,
573 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
574 if (inp != NULL) {
575 INP_RLOCK_ASSERT(inp);
576 if (inp->inp_socket == NULL)
577 error = ENOENT;
578 if (error == 0)
579 error = cr_canseesocket(req->td->td_ucred,
580 inp->inp_socket);
581 if (error == 0)
582 cru2x(inp->inp_cred, &xuc);
583 INP_RUNLOCK(inp);
584 } else
585 error = ENOENT;
586 if (error == 0)
587 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
588 return (error);
589}
590
591SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 0,
592 0, udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection");
593
594static int
595udp6_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr6,
596 struct mbuf *control, struct thread *td)
597{
598 u_int32_t ulen = m->m_pkthdr.len;
599 u_int32_t plen = sizeof(struct udphdr) + ulen;
600 struct ip6_hdr *ip6;
601 struct udphdr *udp6;
602 struct in6_addr *laddr, *faddr, in6a;
603 struct sockaddr_in6 *sin6 = NULL;
604 struct ifnet *oifp = NULL;
605 int scope_ambiguous = 0;
606 u_short fport;
607 int error = 0;
608 struct ip6_pktopts *optp, opt;
609 int af = AF_INET6, hlen = sizeof(struct ip6_hdr);
610 int flags;
611 struct sockaddr_in6 tmp;
612
613 INP_WLOCK_ASSERT(inp);
614 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
615
616 if (addr6) {
617 /* addr6 has been validated in udp6_send(). */
618 sin6 = (struct sockaddr_in6 *)addr6;
619
620 /* protect *sin6 from overwrites */
621 tmp = *sin6;
622 sin6 = &tmp;
623
624 /*
625 * Application should provide a proper zone ID or the use of
626 * default zone IDs should be enabled. Unfortunately, some
627 * applications do not behave as it should, so we need a
628 * workaround. Even if an appropriate ID is not determined,
629 * we'll see if we can determine the outgoing interface. If we
630 * can, determine the zone ID based on the interface below.
631 */
632 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
633 scope_ambiguous = 1;
634 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
635 return (error);
636 }
637
638 if (control) {
639 if ((error = ip6_setpktopts(control, &opt,
640 inp->in6p_outputopts, td->td_ucred, IPPROTO_UDP)) != 0)
641 goto release;
642 optp = &opt;
643 } else
644 optp = inp->in6p_outputopts;
645
646 if (sin6) {
647 faddr = &sin6->sin6_addr;
648
649 /*
650 * Since we saw no essential reason for calling in_pcbconnect,
651 * we get rid of such kind of logic, and call in6_selectsrc
652 * and in6_pcbsetport in order to fill in the local address
653 * and the local port.
654 */
655 if (sin6->sin6_port == 0) {
656 error = EADDRNOTAVAIL;
657 goto release;
658 }
659
660 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
661 /* how about ::ffff:0.0.0.0 case? */
662 error = EISCONN;
663 goto release;
664 }
665
666 fport = sin6->sin6_port; /* allow 0 port */
667
668 if (IN6_IS_ADDR_V4MAPPED(faddr)) {
669 if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) {
670 /*
671 * I believe we should explicitly discard the
672 * packet when mapped addresses are disabled,
673 * rather than send the packet as an IPv6 one.
674 * If we chose the latter approach, the packet
675 * might be sent out on the wire based on the
676 * default route, the situation which we'd
677 * probably want to avoid.
678 * (20010421 jinmei@kame.net)
679 */
680 error = EINVAL;
681 goto release;
682 }
683 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
684 !IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) {
685 /*
686 * when remote addr is an IPv4-mapped address,
687 * local addr should not be an IPv6 address,
688 * since you cannot determine how to map IPv6
689 * source address to IPv4.
690 */
691 error = EINVAL;
692 goto release;
693 }
694
695 af = AF_INET;
696 }
697
698 if (!IN6_IS_ADDR_V4MAPPED(faddr)) {
699 error = in6_selectsrc(sin6, optp, inp, NULL,
700 td->td_ucred, &oifp, &in6a);
701 if (error)
702 goto release;
703 if (oifp && scope_ambiguous &&
704 (error = in6_setscope(&sin6->sin6_addr,
705 oifp, NULL))) {
706 goto release;
707 }
708 laddr = &in6a;
709 } else
710 laddr = &inp->in6p_laddr; /* XXX */
711 if (laddr == NULL) {
712 if (error == 0)
713 error = EADDRNOTAVAIL;
714 goto release;
715 }
716 if (inp->inp_lport == 0 &&
717 (error = in6_pcbsetport(laddr, inp, td->td_ucred)) != 0) {
718 /* Undo an address bind that may have occurred. */
719 inp->in6p_laddr = in6addr_any;
720 goto release;
721 }
722 } else {
723 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
724 error = ENOTCONN;
725 goto release;
726 }
727 if (IN6_IS_ADDR_V4MAPPED(&inp->in6p_faddr)) {
728 if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) {
729 /*
730 * XXX: this case would happen when the
731 * application sets the V6ONLY flag after
732 * connecting the foreign address.
733 * Such applications should be fixed,
734 * so we bark here.
735 */
736 log(LOG_INFO, "udp6_output: IPV6_V6ONLY "
737 "option was set for a connected socket\n");
738 error = EINVAL;
739 goto release;
740 } else
741 af = AF_INET;
742 }
743 laddr = &inp->in6p_laddr;
744 faddr = &inp->in6p_faddr;
745 fport = inp->inp_fport;
746 }
747
748 if (af == AF_INET)
749 hlen = sizeof(struct ip);
750
751 /*
752 * Calculate data length and get a mbuf
753 * for UDP and IP6 headers.
754 */
755 M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT);
756 if (m == 0) {
757 error = ENOBUFS;
758 goto release;
759 }
760
761 /*
762 * Stuff checksum and output datagram.
763 */
764 udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen);
765 udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */
766 udp6->uh_dport = fport;
767 if (plen <= 0xffff)
768 udp6->uh_ulen = htons((u_short)plen);
769 else
770 udp6->uh_ulen = 0;
771 udp6->uh_sum = 0;
772
773 switch (af) {
774 case AF_INET6:
775 ip6 = mtod(m, struct ip6_hdr *);
776 ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK;
777 ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
778 ip6->ip6_vfc |= IPV6_VERSION;
|
774#if 0 /* ip6_plen will be filled in ip6_output. */
| |
775 ip6->ip6_plen = htons((u_short)plen);
| 779 ip6->ip6_plen = htons((u_short)plen);
|
776#endif
| |
777 ip6->ip6_nxt = IPPROTO_UDP;
778 ip6->ip6_hlim = in6_selecthlim(inp, NULL);
779 ip6->ip6_src = *laddr;
780 ip6->ip6_dst = *faddr;
781
782 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, IPPROTO_UDP, 0);
783 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6;
784 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
785
786 flags = 0;
787
| 780 ip6->ip6_nxt = IPPROTO_UDP;
781 ip6->ip6_hlim = in6_selecthlim(inp, NULL);
782 ip6->ip6_src = *laddr;
783 ip6->ip6_dst = *faddr;
784
785 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, IPPROTO_UDP, 0);
786 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6;
787 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
788
789 flags = 0;
790
|
| 791 UDP_PROBE(send, NULL, inp, ip6, inp, udp6);
|
788 UDPSTAT_INC(udps_opackets);
789 error = ip6_output(m, optp, NULL, flags, inp->in6p_moptions,
790 NULL, inp);
791 break;
792 case AF_INET:
793 error = EAFNOSUPPORT;
794 goto release;
795 }
796 goto releaseopt;
797
798release:
799 m_freem(m);
800
801releaseopt:
802 if (control) {
803 ip6_clearpktopts(&opt, -1);
804 m_freem(control);
805 }
806 return (error);
807}
808
809static void
810udp6_abort(struct socket *so)
811{
812 struct inpcb *inp;
813
814 inp = sotoinpcb(so);
815 KASSERT(inp != NULL, ("udp6_abort: inp == NULL"));
816
817#ifdef INET
818 if (inp->inp_vflag & INP_IPV4) {
819 struct pr_usrreqs *pru;
820
821 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
822 (*pru->pru_abort)(so);
823 return;
824 }
825#endif
826
827 INP_WLOCK(inp);
828 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
829 INP_HASH_WLOCK(&V_udbinfo);
830 in6_pcbdisconnect(inp);
831 inp->in6p_laddr = in6addr_any;
832 INP_HASH_WUNLOCK(&V_udbinfo);
833 soisdisconnected(so);
834 }
835 INP_WUNLOCK(inp);
836}
837
838static int
839udp6_attach(struct socket *so, int proto, struct thread *td)
840{
841 struct inpcb *inp;
842 int error;
843
844 inp = sotoinpcb(so);
845 KASSERT(inp == NULL, ("udp6_attach: inp != NULL"));
846
847 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
848 error = soreserve(so, udp_sendspace, udp_recvspace);
849 if (error)
850 return (error);
851 }
852 INP_INFO_WLOCK(&V_udbinfo);
853 error = in_pcballoc(so, &V_udbinfo);
854 if (error) {
855 INP_INFO_WUNLOCK(&V_udbinfo);
856 return (error);
857 }
858 inp = (struct inpcb *)so->so_pcb;
859 inp->inp_vflag |= INP_IPV6;
860 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0)
861 inp->inp_vflag |= INP_IPV4;
862 inp->in6p_hops = -1; /* use kernel default */
863 inp->in6p_cksum = -1; /* just to be sure */
864 /*
865 * XXX: ugly!!
866 * IPv4 TTL initialization is necessary for an IPv6 socket as well,
867 * because the socket may be bound to an IPv6 wildcard address,
868 * which may match an IPv4-mapped IPv6 address.
869 */
870 inp->inp_ip_ttl = V_ip_defttl;
871
872 error = udp_newudpcb(inp);
873 if (error) {
874 in_pcbdetach(inp);
875 in_pcbfree(inp);
876 INP_INFO_WUNLOCK(&V_udbinfo);
877 return (error);
878 }
879 INP_WUNLOCK(inp);
880 INP_INFO_WUNLOCK(&V_udbinfo);
881 return (0);
882}
883
884static int
885udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
886{
887 struct inpcb *inp;
888 int error;
889
890 inp = sotoinpcb(so);
891 KASSERT(inp != NULL, ("udp6_bind: inp == NULL"));
892
893 INP_WLOCK(inp);
894 INP_HASH_WLOCK(&V_udbinfo);
895 inp->inp_vflag &= ~INP_IPV4;
896 inp->inp_vflag |= INP_IPV6;
897 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
898 struct sockaddr_in6 *sin6_p;
899
900 sin6_p = (struct sockaddr_in6 *)nam;
901
902 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
903 inp->inp_vflag |= INP_IPV4;
904#ifdef INET
905 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
906 struct sockaddr_in sin;
907
908 in6_sin6_2_sin(&sin, sin6_p);
909 inp->inp_vflag |= INP_IPV4;
910 inp->inp_vflag &= ~INP_IPV6;
911 error = in_pcbbind(inp, (struct sockaddr *)&sin,
912 td->td_ucred);
913 goto out;
914 }
915#endif
916 }
917
918 error = in6_pcbbind(inp, nam, td->td_ucred);
919#ifdef INET
920out:
921#endif
922 INP_HASH_WUNLOCK(&V_udbinfo);
923 INP_WUNLOCK(inp);
924 return (error);
925}
926
927static void
928udp6_close(struct socket *so)
929{
930 struct inpcb *inp;
931
932 inp = sotoinpcb(so);
933 KASSERT(inp != NULL, ("udp6_close: inp == NULL"));
934
935#ifdef INET
936 if (inp->inp_vflag & INP_IPV4) {
937 struct pr_usrreqs *pru;
938
939 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
940 (*pru->pru_disconnect)(so);
941 return;
942 }
943#endif
944 INP_WLOCK(inp);
945 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
946 INP_HASH_WLOCK(&V_udbinfo);
947 in6_pcbdisconnect(inp);
948 inp->in6p_laddr = in6addr_any;
949 INP_HASH_WUNLOCK(&V_udbinfo);
950 soisdisconnected(so);
951 }
952 INP_WUNLOCK(inp);
953}
954
955static int
956udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
957{
958 struct inpcb *inp;
959 struct sockaddr_in6 *sin6;
960 int error;
961
962 inp = sotoinpcb(so);
963 sin6 = (struct sockaddr_in6 *)nam;
964 KASSERT(inp != NULL, ("udp6_connect: inp == NULL"));
965
966 /*
967 * XXXRW: Need to clarify locking of v4/v6 flags.
968 */
969 INP_WLOCK(inp);
970#ifdef INET
971 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
972 struct sockaddr_in sin;
973
974 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) {
975 error = EINVAL;
976 goto out;
977 }
978 if (inp->inp_faddr.s_addr != INADDR_ANY) {
979 error = EISCONN;
980 goto out;
981 }
982 in6_sin6_2_sin(&sin, sin6);
983 inp->inp_vflag |= INP_IPV4;
984 inp->inp_vflag &= ~INP_IPV6;
985 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr);
986 if (error != 0)
987 goto out;
988 INP_HASH_WLOCK(&V_udbinfo);
989 error = in_pcbconnect(inp, (struct sockaddr *)&sin,
990 td->td_ucred);
991 INP_HASH_WUNLOCK(&V_udbinfo);
992 if (error == 0)
993 soisconnected(so);
994 goto out;
995 }
996#endif
997 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
998 error = EISCONN;
999 goto out;
1000 }
1001 inp->inp_vflag &= ~INP_IPV4;
1002 inp->inp_vflag |= INP_IPV6;
1003 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr);
1004 if (error != 0)
1005 goto out;
1006 INP_HASH_WLOCK(&V_udbinfo);
1007 error = in6_pcbconnect(inp, nam, td->td_ucred);
1008 INP_HASH_WUNLOCK(&V_udbinfo);
1009 if (error == 0)
1010 soisconnected(so);
1011out:
1012 INP_WUNLOCK(inp);
1013 return (error);
1014}
1015
1016static void
1017udp6_detach(struct socket *so)
1018{
1019 struct inpcb *inp;
1020 struct udpcb *up;
1021
1022 inp = sotoinpcb(so);
1023 KASSERT(inp != NULL, ("udp6_detach: inp == NULL"));
1024
1025 INP_INFO_WLOCK(&V_udbinfo);
1026 INP_WLOCK(inp);
1027 up = intoudpcb(inp);
1028 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1029 in_pcbdetach(inp);
1030 in_pcbfree(inp);
1031 INP_INFO_WUNLOCK(&V_udbinfo);
1032 udp_discardcb(up);
1033}
1034
1035static int
1036udp6_disconnect(struct socket *so)
1037{
1038 struct inpcb *inp;
1039 int error;
1040
1041 inp = sotoinpcb(so);
1042 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL"));
1043
1044#ifdef INET
1045 if (inp->inp_vflag & INP_IPV4) {
1046 struct pr_usrreqs *pru;
1047
1048 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
1049 (void)(*pru->pru_disconnect)(so);
1050 return (0);
1051 }
1052#endif
1053
1054 INP_WLOCK(inp);
1055
1056 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
1057 error = ENOTCONN;
1058 goto out;
1059 }
1060
1061 INP_HASH_WLOCK(&V_udbinfo);
1062 in6_pcbdisconnect(inp);
1063 inp->in6p_laddr = in6addr_any;
1064 INP_HASH_WUNLOCK(&V_udbinfo);
1065 SOCK_LOCK(so);
1066 so->so_state &= ~SS_ISCONNECTED; /* XXX */
1067 SOCK_UNLOCK(so);
1068out:
1069 INP_WUNLOCK(inp);
1070 return (0);
1071}
1072
1073static int
1074udp6_send(struct socket *so, int flags, struct mbuf *m,
1075 struct sockaddr *addr, struct mbuf *control, struct thread *td)
1076{
1077 struct inpcb *inp;
1078 int error = 0;
1079
1080 inp = sotoinpcb(so);
1081 KASSERT(inp != NULL, ("udp6_send: inp == NULL"));
1082
1083 INP_WLOCK(inp);
1084 if (addr) {
1085 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
1086 error = EINVAL;
1087 goto bad;
1088 }
1089 if (addr->sa_family != AF_INET6) {
1090 error = EAFNOSUPPORT;
1091 goto bad;
1092 }
1093 }
1094
1095#ifdef INET
1096 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
1097 int hasv4addr;
1098 struct sockaddr_in6 *sin6 = 0;
1099
1100 if (addr == 0)
1101 hasv4addr = (inp->inp_vflag & INP_IPV4);
1102 else {
1103 sin6 = (struct sockaddr_in6 *)addr;
1104 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
1105 ? 1 : 0;
1106 }
1107 if (hasv4addr) {
1108 struct pr_usrreqs *pru;
1109
1110 /*
1111 * XXXRW: We release UDP-layer locks before calling
1112 * udp_send() in order to avoid recursion. However,
1113 * this does mean there is a short window where inp's
1114 * fields are unstable. Could this lead to a
1115 * potential race in which the factors causing us to
1116 * select the UDPv4 output routine are invalidated?
1117 */
1118 INP_WUNLOCK(inp);
1119 if (sin6)
1120 in6_sin6_2_sin_in_sock(addr);
1121 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
1122 /* addr will just be freed in sendit(). */
1123 return ((*pru->pru_send)(so, flags, m, addr, control,
1124 td));
1125 }
1126 }
1127#endif
1128#ifdef MAC
1129 mac_inpcb_create_mbuf(inp, m);
1130#endif
1131 INP_HASH_WLOCK(&V_udbinfo);
1132 error = udp6_output(inp, m, addr, control, td);
1133 INP_HASH_WUNLOCK(&V_udbinfo);
1134#ifdef INET
1135#endif
1136 INP_WUNLOCK(inp);
1137 return (error);
1138
1139bad:
1140 INP_WUNLOCK(inp);
1141 m_freem(m);
1142 return (error);
1143}
1144
1145struct pr_usrreqs udp6_usrreqs = {
1146 .pru_abort = udp6_abort,
1147 .pru_attach = udp6_attach,
1148 .pru_bind = udp6_bind,
1149 .pru_connect = udp6_connect,
1150 .pru_control = in6_control,
1151 .pru_detach = udp6_detach,
1152 .pru_disconnect = udp6_disconnect,
1153 .pru_peeraddr = in6_mapped_peeraddr,
1154 .pru_send = udp6_send,
1155 .pru_shutdown = udp_shutdown,
1156 .pru_sockaddr = in6_mapped_sockaddr,
1157 .pru_soreceive = soreceive_dgram,
1158 .pru_sosend = sosend_dgram,
1159 .pru_sosetlabel = in_pcbsosetlabel,
1160 .pru_close = udp6_close
1161};
| 792 UDPSTAT_INC(udps_opackets);
793 error = ip6_output(m, optp, NULL, flags, inp->in6p_moptions,
794 NULL, inp);
795 break;
796 case AF_INET:
797 error = EAFNOSUPPORT;
798 goto release;
799 }
800 goto releaseopt;
801
802release:
803 m_freem(m);
804
805releaseopt:
806 if (control) {
807 ip6_clearpktopts(&opt, -1);
808 m_freem(control);
809 }
810 return (error);
811}
812
813static void
814udp6_abort(struct socket *so)
815{
816 struct inpcb *inp;
817
818 inp = sotoinpcb(so);
819 KASSERT(inp != NULL, ("udp6_abort: inp == NULL"));
820
821#ifdef INET
822 if (inp->inp_vflag & INP_IPV4) {
823 struct pr_usrreqs *pru;
824
825 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
826 (*pru->pru_abort)(so);
827 return;
828 }
829#endif
830
831 INP_WLOCK(inp);
832 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
833 INP_HASH_WLOCK(&V_udbinfo);
834 in6_pcbdisconnect(inp);
835 inp->in6p_laddr = in6addr_any;
836 INP_HASH_WUNLOCK(&V_udbinfo);
837 soisdisconnected(so);
838 }
839 INP_WUNLOCK(inp);
840}
841
842static int
843udp6_attach(struct socket *so, int proto, struct thread *td)
844{
845 struct inpcb *inp;
846 int error;
847
848 inp = sotoinpcb(so);
849 KASSERT(inp == NULL, ("udp6_attach: inp != NULL"));
850
851 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
852 error = soreserve(so, udp_sendspace, udp_recvspace);
853 if (error)
854 return (error);
855 }
856 INP_INFO_WLOCK(&V_udbinfo);
857 error = in_pcballoc(so, &V_udbinfo);
858 if (error) {
859 INP_INFO_WUNLOCK(&V_udbinfo);
860 return (error);
861 }
862 inp = (struct inpcb *)so->so_pcb;
863 inp->inp_vflag |= INP_IPV6;
864 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0)
865 inp->inp_vflag |= INP_IPV4;
866 inp->in6p_hops = -1; /* use kernel default */
867 inp->in6p_cksum = -1; /* just to be sure */
868 /*
869 * XXX: ugly!!
870 * IPv4 TTL initialization is necessary for an IPv6 socket as well,
871 * because the socket may be bound to an IPv6 wildcard address,
872 * which may match an IPv4-mapped IPv6 address.
873 */
874 inp->inp_ip_ttl = V_ip_defttl;
875
876 error = udp_newudpcb(inp);
877 if (error) {
878 in_pcbdetach(inp);
879 in_pcbfree(inp);
880 INP_INFO_WUNLOCK(&V_udbinfo);
881 return (error);
882 }
883 INP_WUNLOCK(inp);
884 INP_INFO_WUNLOCK(&V_udbinfo);
885 return (0);
886}
887
888static int
889udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
890{
891 struct inpcb *inp;
892 int error;
893
894 inp = sotoinpcb(so);
895 KASSERT(inp != NULL, ("udp6_bind: inp == NULL"));
896
897 INP_WLOCK(inp);
898 INP_HASH_WLOCK(&V_udbinfo);
899 inp->inp_vflag &= ~INP_IPV4;
900 inp->inp_vflag |= INP_IPV6;
901 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
902 struct sockaddr_in6 *sin6_p;
903
904 sin6_p = (struct sockaddr_in6 *)nam;
905
906 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
907 inp->inp_vflag |= INP_IPV4;
908#ifdef INET
909 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
910 struct sockaddr_in sin;
911
912 in6_sin6_2_sin(&sin, sin6_p);
913 inp->inp_vflag |= INP_IPV4;
914 inp->inp_vflag &= ~INP_IPV6;
915 error = in_pcbbind(inp, (struct sockaddr *)&sin,
916 td->td_ucred);
917 goto out;
918 }
919#endif
920 }
921
922 error = in6_pcbbind(inp, nam, td->td_ucred);
923#ifdef INET
924out:
925#endif
926 INP_HASH_WUNLOCK(&V_udbinfo);
927 INP_WUNLOCK(inp);
928 return (error);
929}
930
931static void
932udp6_close(struct socket *so)
933{
934 struct inpcb *inp;
935
936 inp = sotoinpcb(so);
937 KASSERT(inp != NULL, ("udp6_close: inp == NULL"));
938
939#ifdef INET
940 if (inp->inp_vflag & INP_IPV4) {
941 struct pr_usrreqs *pru;
942
943 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
944 (*pru->pru_disconnect)(so);
945 return;
946 }
947#endif
948 INP_WLOCK(inp);
949 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
950 INP_HASH_WLOCK(&V_udbinfo);
951 in6_pcbdisconnect(inp);
952 inp->in6p_laddr = in6addr_any;
953 INP_HASH_WUNLOCK(&V_udbinfo);
954 soisdisconnected(so);
955 }
956 INP_WUNLOCK(inp);
957}
958
959static int
960udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
961{
962 struct inpcb *inp;
963 struct sockaddr_in6 *sin6;
964 int error;
965
966 inp = sotoinpcb(so);
967 sin6 = (struct sockaddr_in6 *)nam;
968 KASSERT(inp != NULL, ("udp6_connect: inp == NULL"));
969
970 /*
971 * XXXRW: Need to clarify locking of v4/v6 flags.
972 */
973 INP_WLOCK(inp);
974#ifdef INET
975 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
976 struct sockaddr_in sin;
977
978 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) {
979 error = EINVAL;
980 goto out;
981 }
982 if (inp->inp_faddr.s_addr != INADDR_ANY) {
983 error = EISCONN;
984 goto out;
985 }
986 in6_sin6_2_sin(&sin, sin6);
987 inp->inp_vflag |= INP_IPV4;
988 inp->inp_vflag &= ~INP_IPV6;
989 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr);
990 if (error != 0)
991 goto out;
992 INP_HASH_WLOCK(&V_udbinfo);
993 error = in_pcbconnect(inp, (struct sockaddr *)&sin,
994 td->td_ucred);
995 INP_HASH_WUNLOCK(&V_udbinfo);
996 if (error == 0)
997 soisconnected(so);
998 goto out;
999 }
1000#endif
1001 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
1002 error = EISCONN;
1003 goto out;
1004 }
1005 inp->inp_vflag &= ~INP_IPV4;
1006 inp->inp_vflag |= INP_IPV6;
1007 error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr);
1008 if (error != 0)
1009 goto out;
1010 INP_HASH_WLOCK(&V_udbinfo);
1011 error = in6_pcbconnect(inp, nam, td->td_ucred);
1012 INP_HASH_WUNLOCK(&V_udbinfo);
1013 if (error == 0)
1014 soisconnected(so);
1015out:
1016 INP_WUNLOCK(inp);
1017 return (error);
1018}
1019
1020static void
1021udp6_detach(struct socket *so)
1022{
1023 struct inpcb *inp;
1024 struct udpcb *up;
1025
1026 inp = sotoinpcb(so);
1027 KASSERT(inp != NULL, ("udp6_detach: inp == NULL"));
1028
1029 INP_INFO_WLOCK(&V_udbinfo);
1030 INP_WLOCK(inp);
1031 up = intoudpcb(inp);
1032 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1033 in_pcbdetach(inp);
1034 in_pcbfree(inp);
1035 INP_INFO_WUNLOCK(&V_udbinfo);
1036 udp_discardcb(up);
1037}
1038
1039static int
1040udp6_disconnect(struct socket *so)
1041{
1042 struct inpcb *inp;
1043 int error;
1044
1045 inp = sotoinpcb(so);
1046 KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL"));
1047
1048#ifdef INET
1049 if (inp->inp_vflag & INP_IPV4) {
1050 struct pr_usrreqs *pru;
1051
1052 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
1053 (void)(*pru->pru_disconnect)(so);
1054 return (0);
1055 }
1056#endif
1057
1058 INP_WLOCK(inp);
1059
1060 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
1061 error = ENOTCONN;
1062 goto out;
1063 }
1064
1065 INP_HASH_WLOCK(&V_udbinfo);
1066 in6_pcbdisconnect(inp);
1067 inp->in6p_laddr = in6addr_any;
1068 INP_HASH_WUNLOCK(&V_udbinfo);
1069 SOCK_LOCK(so);
1070 so->so_state &= ~SS_ISCONNECTED; /* XXX */
1071 SOCK_UNLOCK(so);
1072out:
1073 INP_WUNLOCK(inp);
1074 return (0);
1075}
1076
1077static int
1078udp6_send(struct socket *so, int flags, struct mbuf *m,
1079 struct sockaddr *addr, struct mbuf *control, struct thread *td)
1080{
1081 struct inpcb *inp;
1082 int error = 0;
1083
1084 inp = sotoinpcb(so);
1085 KASSERT(inp != NULL, ("udp6_send: inp == NULL"));
1086
1087 INP_WLOCK(inp);
1088 if (addr) {
1089 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
1090 error = EINVAL;
1091 goto bad;
1092 }
1093 if (addr->sa_family != AF_INET6) {
1094 error = EAFNOSUPPORT;
1095 goto bad;
1096 }
1097 }
1098
1099#ifdef INET
1100 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
1101 int hasv4addr;
1102 struct sockaddr_in6 *sin6 = 0;
1103
1104 if (addr == 0)
1105 hasv4addr = (inp->inp_vflag & INP_IPV4);
1106 else {
1107 sin6 = (struct sockaddr_in6 *)addr;
1108 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
1109 ? 1 : 0;
1110 }
1111 if (hasv4addr) {
1112 struct pr_usrreqs *pru;
1113
1114 /*
1115 * XXXRW: We release UDP-layer locks before calling
1116 * udp_send() in order to avoid recursion. However,
1117 * this does mean there is a short window where inp's
1118 * fields are unstable. Could this lead to a
1119 * potential race in which the factors causing us to
1120 * select the UDPv4 output routine are invalidated?
1121 */
1122 INP_WUNLOCK(inp);
1123 if (sin6)
1124 in6_sin6_2_sin_in_sock(addr);
1125 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
1126 /* addr will just be freed in sendit(). */
1127 return ((*pru->pru_send)(so, flags, m, addr, control,
1128 td));
1129 }
1130 }
1131#endif
1132#ifdef MAC
1133 mac_inpcb_create_mbuf(inp, m);
1134#endif
1135 INP_HASH_WLOCK(&V_udbinfo);
1136 error = udp6_output(inp, m, addr, control, td);
1137 INP_HASH_WUNLOCK(&V_udbinfo);
1138#ifdef INET
1139#endif
1140 INP_WUNLOCK(inp);
1141 return (error);
1142
1143bad:
1144 INP_WUNLOCK(inp);
1145 m_freem(m);
1146 return (error);
1147}
1148
1149struct pr_usrreqs udp6_usrreqs = {
1150 .pru_abort = udp6_abort,
1151 .pru_attach = udp6_attach,
1152 .pru_bind = udp6_bind,
1153 .pru_connect = udp6_connect,
1154 .pru_control = in6_control,
1155 .pru_detach = udp6_detach,
1156 .pru_disconnect = udp6_disconnect,
1157 .pru_peeraddr = in6_mapped_peeraddr,
1158 .pru_send = udp6_send,
1159 .pru_shutdown = udp_shutdown,
1160 .pru_sockaddr = in6_mapped_sockaddr,
1161 .pru_soreceive = soreceive_dgram,
1162 .pru_sosend = sosend_dgram,
1163 .pru_sosetlabel = in_pcbsosetlabel,
1164 .pru_close = udp6_close
1165};
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