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: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $
34 */
35
36/*-
37 * Copyright (c) 1982, 1986, 1991, 1993
38 * The Regents of the University of California. All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 4. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
63 *
64 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
65 */
66
67#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: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $
34 */
35
36/*-
37 * Copyright (c) 1982, 1986, 1991, 1993
38 * The Regents of the University of California. All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 4. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
63 *
64 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
65 */
66
67#include <sys/cdefs.h>
|
68__FBSDID("$FreeBSD: head/sys/netinet6/in6_pcb.c 222488 2011-05-30 09:43:55Z rwatson $");
| 68__FBSDID("$FreeBSD: head/sys/netinet6/in6_pcb.c 222691 2011-06-04 16:33:06Z rwatson $");
|
69
70#include "opt_inet.h"
71#include "opt_inet6.h"
72#include "opt_ipsec.h"
73
74#include <sys/param.h>
75#include <sys/systm.h>
76#include <sys/malloc.h>
77#include <sys/mbuf.h>
78#include <sys/domain.h>
79#include <sys/protosw.h>
80#include <sys/socket.h>
81#include <sys/socketvar.h>
82#include <sys/sockio.h>
83#include <sys/errno.h>
84#include <sys/time.h>
85#include <sys/priv.h>
86#include <sys/proc.h>
87#include <sys/jail.h>
88
89#include <vm/uma.h>
90
91#include <net/if.h>
92#include <net/if_types.h>
93#include <net/route.h>
94
95#include <netinet/in.h>
96#include <netinet/in_var.h>
97#include <netinet/in_systm.h>
98#include <netinet/tcp_var.h>
99#include <netinet/ip6.h>
100#include <netinet/ip_var.h>
101
102#include <netinet6/ip6_var.h>
103#include <netinet6/nd6.h>
104#include <netinet/in_pcb.h>
105#include <netinet6/in6_pcb.h>
106#include <netinet6/scope6_var.h>
107
108struct in6_addr zeroin6_addr;
109
110int
111in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
112 struct ucred *cred)
113{
114 struct socket *so = inp->inp_socket;
115 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
116 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
117 u_short lport = 0;
118 int error, lookupflags = 0;
119 int reuseport = (so->so_options & SO_REUSEPORT);
120
121 INP_WLOCK_ASSERT(inp);
122 INP_HASH_WLOCK_ASSERT(pcbinfo);
123
124 if (TAILQ_EMPTY(&V_in6_ifaddrhead)) /* XXX broken! */
125 return (EADDRNOTAVAIL);
126 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
127 return (EINVAL);
128 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
129 lookupflags = INPLOOKUP_WILDCARD;
130 if (nam == NULL) {
131 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
132 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
133 return (error);
134 } else {
135 sin6 = (struct sockaddr_in6 *)nam;
136 if (nam->sa_len != sizeof(*sin6))
137 return (EINVAL);
138 /*
139 * family check.
140 */
141 if (nam->sa_family != AF_INET6)
142 return (EAFNOSUPPORT);
143
144 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
145 return(error);
146
147 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
148 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
149 return (error);
150
151 lport = sin6->sin6_port;
152 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
153 /*
154 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
155 * allow compepte duplication of binding if
156 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
157 * and a multicast address is bound on both
158 * new and duplicated sockets.
159 */
160 if (so->so_options & SO_REUSEADDR)
161 reuseport = SO_REUSEADDR|SO_REUSEPORT;
162 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
163 struct ifaddr *ifa;
164
165 sin6->sin6_port = 0; /* yech... */
166 if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
167 NULL &&
168 (inp->inp_flags & INP_BINDANY) == 0) {
169 return (EADDRNOTAVAIL);
170 }
171
172 /*
173 * XXX: bind to an anycast address might accidentally
174 * cause sending a packet with anycast source address.
175 * We should allow to bind to a deprecated address, since
176 * the application dares to use it.
177 */
178 if (ifa != NULL &&
179 ((struct in6_ifaddr *)ifa)->ia6_flags &
180 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
181 ifa_free(ifa);
182 return (EADDRNOTAVAIL);
183 }
184 if (ifa != NULL)
185 ifa_free(ifa);
186 }
187 if (lport) {
188 struct inpcb *t;
189
190 /* GROSS */
191 if (ntohs(lport) <= V_ipport_reservedhigh &&
192 ntohs(lport) >= V_ipport_reservedlow &&
193 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
194 0))
195 return (EACCES);
196 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
197 priv_check_cred(inp->inp_cred,
198 PRIV_NETINET_REUSEPORT, 0) != 0) {
199 t = in6_pcblookup_local(pcbinfo,
200 &sin6->sin6_addr, lport,
201 INPLOOKUP_WILDCARD, cred);
202 if (t &&
203 ((t->inp_flags & INP_TIMEWAIT) == 0) &&
204 (so->so_type != SOCK_STREAM ||
205 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
206 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
207 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
208 (t->inp_socket->so_options & SO_REUSEPORT)
209 == 0) && (inp->inp_cred->cr_uid !=
210 t->inp_cred->cr_uid))
211 return (EADDRINUSE);
212#ifdef INET
213 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
214 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
215 struct sockaddr_in sin;
216
217 in6_sin6_2_sin(&sin, sin6);
218 t = in_pcblookup_local(pcbinfo,
219 sin.sin_addr, lport,
220 INPLOOKUP_WILDCARD, cred);
221 if (t &&
222 ((t->inp_flags &
223 INP_TIMEWAIT) == 0) &&
224 (so->so_type != SOCK_STREAM ||
225 ntohl(t->inp_faddr.s_addr) ==
226 INADDR_ANY) &&
227 (inp->inp_cred->cr_uid !=
228 t->inp_cred->cr_uid))
229 return (EADDRINUSE);
230 }
231#endif
232 }
233 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
234 lport, lookupflags, cred);
235 if (t && (reuseport & ((t->inp_flags & INP_TIMEWAIT) ?
236 intotw(t)->tw_so_options :
237 t->inp_socket->so_options)) == 0)
238 return (EADDRINUSE);
239#ifdef INET
240 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
241 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
242 struct sockaddr_in sin;
243
244 in6_sin6_2_sin(&sin, sin6);
245 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
246 lport, lookupflags, cred);
247 if (t && t->inp_flags & INP_TIMEWAIT) {
248 if ((reuseport &
249 intotw(t)->tw_so_options) == 0 &&
250 (ntohl(t->inp_laddr.s_addr) !=
251 INADDR_ANY || ((inp->inp_vflag &
252 INP_IPV6PROTO) ==
253 (t->inp_vflag & INP_IPV6PROTO))))
254 return (EADDRINUSE);
255 }
256 else if (t &&
257 (reuseport & t->inp_socket->so_options)
258 == 0 && (ntohl(t->inp_laddr.s_addr) !=
259 INADDR_ANY || INP_SOCKAF(so) ==
260 INP_SOCKAF(t->inp_socket)))
261 return (EADDRINUSE);
262 }
263#endif
264 }
265 inp->in6p_laddr = sin6->sin6_addr;
266 }
267 if (lport == 0) {
268 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
269 /* Undo an address bind that may have occurred. */
270 inp->in6p_laddr = in6addr_any;
271 return (error);
272 }
273 } else {
274 inp->inp_lport = lport;
275 if (in_pcbinshash(inp) != 0) {
276 inp->in6p_laddr = in6addr_any;
277 inp->inp_lport = 0;
278 return (EAGAIN);
279 }
280 }
281 return (0);
282}
283
284/*
285 * Transform old in6_pcbconnect() into an inner subroutine for new
286 * in6_pcbconnect(): Do some validity-checking on the remote
287 * address (in mbuf 'nam') and then determine local host address
288 * (i.e., which interface) to use to access that remote host.
289 *
290 * This preserves definition of in6_pcbconnect(), while supporting a
291 * slightly different version for T/TCP. (This is more than
292 * a bit of a kludge, but cleaning up the internal interfaces would
293 * have forced minor changes in every protocol).
294 */
295int
296in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
297 struct in6_addr *plocal_addr6)
298{
299 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
300 int error = 0;
301 struct ifnet *ifp = NULL;
302 int scope_ambiguous = 0;
303 struct in6_addr in6a;
304
305 INP_WLOCK_ASSERT(inp);
306 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); /* XXXRW: why? */
307
308 if (nam->sa_len != sizeof (*sin6))
309 return (EINVAL);
310 if (sin6->sin6_family != AF_INET6)
311 return (EAFNOSUPPORT);
312 if (sin6->sin6_port == 0)
313 return (EADDRNOTAVAIL);
314
315 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
316 scope_ambiguous = 1;
317 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
318 return(error);
319
320 if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) {
321 /*
322 * If the destination address is UNSPECIFIED addr,
323 * use the loopback addr, e.g ::1.
324 */
325 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
326 sin6->sin6_addr = in6addr_loopback;
327 }
328 if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
329 return (error);
330
331 error = in6_selectsrc(sin6, inp->in6p_outputopts,
332 inp, NULL, inp->inp_cred, &ifp, &in6a);
333 if (error)
334 return (error);
335
336 if (ifp && scope_ambiguous &&
337 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
338 return(error);
339 }
340
341 /*
342 * Do not update this earlier, in case we return with an error.
343 *
344 * XXX: this in6_selectsrc result might replace the bound local
345 * address with the address specified by setsockopt(IPV6_PKTINFO).
346 * Is it the intended behavior?
347 */
348 *plocal_addr6 = in6a;
349
350 /*
351 * Don't do pcblookup call here; return interface in
352 * plocal_addr6
353 * and exit to caller, that will do the lookup.
354 */
355
356 return (0);
357}
358
359/*
360 * Outer subroutine:
361 * Connect from a socket to a specified address.
362 * Both address and port must be specified in argument sin.
363 * If don't have a local address for this socket yet,
364 * then pick one.
365 */
366int
| 69
70#include "opt_inet.h"
71#include "opt_inet6.h"
72#include "opt_ipsec.h"
73
74#include <sys/param.h>
75#include <sys/systm.h>
76#include <sys/malloc.h>
77#include <sys/mbuf.h>
78#include <sys/domain.h>
79#include <sys/protosw.h>
80#include <sys/socket.h>
81#include <sys/socketvar.h>
82#include <sys/sockio.h>
83#include <sys/errno.h>
84#include <sys/time.h>
85#include <sys/priv.h>
86#include <sys/proc.h>
87#include <sys/jail.h>
88
89#include <vm/uma.h>
90
91#include <net/if.h>
92#include <net/if_types.h>
93#include <net/route.h>
94
95#include <netinet/in.h>
96#include <netinet/in_var.h>
97#include <netinet/in_systm.h>
98#include <netinet/tcp_var.h>
99#include <netinet/ip6.h>
100#include <netinet/ip_var.h>
101
102#include <netinet6/ip6_var.h>
103#include <netinet6/nd6.h>
104#include <netinet/in_pcb.h>
105#include <netinet6/in6_pcb.h>
106#include <netinet6/scope6_var.h>
107
108struct in6_addr zeroin6_addr;
109
110int
111in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
112 struct ucred *cred)
113{
114 struct socket *so = inp->inp_socket;
115 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
116 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
117 u_short lport = 0;
118 int error, lookupflags = 0;
119 int reuseport = (so->so_options & SO_REUSEPORT);
120
121 INP_WLOCK_ASSERT(inp);
122 INP_HASH_WLOCK_ASSERT(pcbinfo);
123
124 if (TAILQ_EMPTY(&V_in6_ifaddrhead)) /* XXX broken! */
125 return (EADDRNOTAVAIL);
126 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
127 return (EINVAL);
128 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
129 lookupflags = INPLOOKUP_WILDCARD;
130 if (nam == NULL) {
131 if ((error = prison_local_ip6(cred, &inp->in6p_laddr,
132 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
133 return (error);
134 } else {
135 sin6 = (struct sockaddr_in6 *)nam;
136 if (nam->sa_len != sizeof(*sin6))
137 return (EINVAL);
138 /*
139 * family check.
140 */
141 if (nam->sa_family != AF_INET6)
142 return (EAFNOSUPPORT);
143
144 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
145 return(error);
146
147 if ((error = prison_local_ip6(cred, &sin6->sin6_addr,
148 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0)
149 return (error);
150
151 lport = sin6->sin6_port;
152 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
153 /*
154 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
155 * allow compepte duplication of binding if
156 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
157 * and a multicast address is bound on both
158 * new and duplicated sockets.
159 */
160 if (so->so_options & SO_REUSEADDR)
161 reuseport = SO_REUSEADDR|SO_REUSEPORT;
162 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
163 struct ifaddr *ifa;
164
165 sin6->sin6_port = 0; /* yech... */
166 if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) ==
167 NULL &&
168 (inp->inp_flags & INP_BINDANY) == 0) {
169 return (EADDRNOTAVAIL);
170 }
171
172 /*
173 * XXX: bind to an anycast address might accidentally
174 * cause sending a packet with anycast source address.
175 * We should allow to bind to a deprecated address, since
176 * the application dares to use it.
177 */
178 if (ifa != NULL &&
179 ((struct in6_ifaddr *)ifa)->ia6_flags &
180 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
181 ifa_free(ifa);
182 return (EADDRNOTAVAIL);
183 }
184 if (ifa != NULL)
185 ifa_free(ifa);
186 }
187 if (lport) {
188 struct inpcb *t;
189
190 /* GROSS */
191 if (ntohs(lport) <= V_ipport_reservedhigh &&
192 ntohs(lport) >= V_ipport_reservedlow &&
193 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
194 0))
195 return (EACCES);
196 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
197 priv_check_cred(inp->inp_cred,
198 PRIV_NETINET_REUSEPORT, 0) != 0) {
199 t = in6_pcblookup_local(pcbinfo,
200 &sin6->sin6_addr, lport,
201 INPLOOKUP_WILDCARD, cred);
202 if (t &&
203 ((t->inp_flags & INP_TIMEWAIT) == 0) &&
204 (so->so_type != SOCK_STREAM ||
205 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
206 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
207 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
208 (t->inp_socket->so_options & SO_REUSEPORT)
209 == 0) && (inp->inp_cred->cr_uid !=
210 t->inp_cred->cr_uid))
211 return (EADDRINUSE);
212#ifdef INET
213 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
214 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
215 struct sockaddr_in sin;
216
217 in6_sin6_2_sin(&sin, sin6);
218 t = in_pcblookup_local(pcbinfo,
219 sin.sin_addr, lport,
220 INPLOOKUP_WILDCARD, cred);
221 if (t &&
222 ((t->inp_flags &
223 INP_TIMEWAIT) == 0) &&
224 (so->so_type != SOCK_STREAM ||
225 ntohl(t->inp_faddr.s_addr) ==
226 INADDR_ANY) &&
227 (inp->inp_cred->cr_uid !=
228 t->inp_cred->cr_uid))
229 return (EADDRINUSE);
230 }
231#endif
232 }
233 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
234 lport, lookupflags, cred);
235 if (t && (reuseport & ((t->inp_flags & INP_TIMEWAIT) ?
236 intotw(t)->tw_so_options :
237 t->inp_socket->so_options)) == 0)
238 return (EADDRINUSE);
239#ifdef INET
240 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
241 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
242 struct sockaddr_in sin;
243
244 in6_sin6_2_sin(&sin, sin6);
245 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
246 lport, lookupflags, cred);
247 if (t && t->inp_flags & INP_TIMEWAIT) {
248 if ((reuseport &
249 intotw(t)->tw_so_options) == 0 &&
250 (ntohl(t->inp_laddr.s_addr) !=
251 INADDR_ANY || ((inp->inp_vflag &
252 INP_IPV6PROTO) ==
253 (t->inp_vflag & INP_IPV6PROTO))))
254 return (EADDRINUSE);
255 }
256 else if (t &&
257 (reuseport & t->inp_socket->so_options)
258 == 0 && (ntohl(t->inp_laddr.s_addr) !=
259 INADDR_ANY || INP_SOCKAF(so) ==
260 INP_SOCKAF(t->inp_socket)))
261 return (EADDRINUSE);
262 }
263#endif
264 }
265 inp->in6p_laddr = sin6->sin6_addr;
266 }
267 if (lport == 0) {
268 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) {
269 /* Undo an address bind that may have occurred. */
270 inp->in6p_laddr = in6addr_any;
271 return (error);
272 }
273 } else {
274 inp->inp_lport = lport;
275 if (in_pcbinshash(inp) != 0) {
276 inp->in6p_laddr = in6addr_any;
277 inp->inp_lport = 0;
278 return (EAGAIN);
279 }
280 }
281 return (0);
282}
283
284/*
285 * Transform old in6_pcbconnect() into an inner subroutine for new
286 * in6_pcbconnect(): Do some validity-checking on the remote
287 * address (in mbuf 'nam') and then determine local host address
288 * (i.e., which interface) to use to access that remote host.
289 *
290 * This preserves definition of in6_pcbconnect(), while supporting a
291 * slightly different version for T/TCP. (This is more than
292 * a bit of a kludge, but cleaning up the internal interfaces would
293 * have forced minor changes in every protocol).
294 */
295int
296in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
297 struct in6_addr *plocal_addr6)
298{
299 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
300 int error = 0;
301 struct ifnet *ifp = NULL;
302 int scope_ambiguous = 0;
303 struct in6_addr in6a;
304
305 INP_WLOCK_ASSERT(inp);
306 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); /* XXXRW: why? */
307
308 if (nam->sa_len != sizeof (*sin6))
309 return (EINVAL);
310 if (sin6->sin6_family != AF_INET6)
311 return (EAFNOSUPPORT);
312 if (sin6->sin6_port == 0)
313 return (EADDRNOTAVAIL);
314
315 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
316 scope_ambiguous = 1;
317 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
318 return(error);
319
320 if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) {
321 /*
322 * If the destination address is UNSPECIFIED addr,
323 * use the loopback addr, e.g ::1.
324 */
325 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
326 sin6->sin6_addr = in6addr_loopback;
327 }
328 if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
329 return (error);
330
331 error = in6_selectsrc(sin6, inp->in6p_outputopts,
332 inp, NULL, inp->inp_cred, &ifp, &in6a);
333 if (error)
334 return (error);
335
336 if (ifp && scope_ambiguous &&
337 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
338 return(error);
339 }
340
341 /*
342 * Do not update this earlier, in case we return with an error.
343 *
344 * XXX: this in6_selectsrc result might replace the bound local
345 * address with the address specified by setsockopt(IPV6_PKTINFO).
346 * Is it the intended behavior?
347 */
348 *plocal_addr6 = in6a;
349
350 /*
351 * Don't do pcblookup call here; return interface in
352 * plocal_addr6
353 * and exit to caller, that will do the lookup.
354 */
355
356 return (0);
357}
358
359/*
360 * Outer subroutine:
361 * Connect from a socket to a specified address.
362 * Both address and port must be specified in argument sin.
363 * If don't have a local address for this socket yet,
364 * then pick one.
365 */
366int
|
367in6_pcbconnect(register struct inpcb *inp, struct sockaddr *nam,
368 struct ucred *cred)
| 367in6_pcbconnect_mbuf(register struct inpcb *inp, struct sockaddr *nam,
368 struct ucred *cred, struct mbuf *m)
|
369{
370 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
371 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
372 struct in6_addr addr6;
373 int error;
374
375 INP_WLOCK_ASSERT(inp);
376 INP_HASH_WLOCK_ASSERT(pcbinfo);
377
378 /*
379 * Call inner routine, to assign local interface address.
380 * in6_pcbladdr() may automatically fill in sin6_scope_id.
381 */
382 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
383 return (error);
384
385 if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
386 sin6->sin6_port,
387 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
388 ? &addr6 : &inp->in6p_laddr,
389 inp->inp_lport, 0, NULL) != NULL) {
390 return (EADDRINUSE);
391 }
392 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
393 if (inp->inp_lport == 0) {
394 error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
395 if (error)
396 return (error);
397 }
398 inp->in6p_laddr = addr6;
399 }
400 inp->in6p_faddr = sin6->sin6_addr;
401 inp->inp_fport = sin6->sin6_port;
402 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
403 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
404 if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
405 inp->inp_flow |=
406 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
407
| 369{
370 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
371 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
372 struct in6_addr addr6;
373 int error;
374
375 INP_WLOCK_ASSERT(inp);
376 INP_HASH_WLOCK_ASSERT(pcbinfo);
377
378 /*
379 * Call inner routine, to assign local interface address.
380 * in6_pcbladdr() may automatically fill in sin6_scope_id.
381 */
382 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
383 return (error);
384
385 if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr,
386 sin6->sin6_port,
387 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
388 ? &addr6 : &inp->in6p_laddr,
389 inp->inp_lport, 0, NULL) != NULL) {
390 return (EADDRINUSE);
391 }
392 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
393 if (inp->inp_lport == 0) {
394 error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
395 if (error)
396 return (error);
397 }
398 inp->in6p_laddr = addr6;
399 }
400 inp->in6p_faddr = sin6->sin6_addr;
401 inp->inp_fport = sin6->sin6_port;
402 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
403 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
404 if (inp->inp_flags & IN6P_AUTOFLOWLABEL)
405 inp->inp_flow |=
406 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
407
|
408 in_pcbrehash(inp);
| 408 in_pcbrehash_mbuf(inp, m);
|
409
410 return (0);
411}
412
| 409
410 return (0);
411}
412
|
| 413int
414in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
415{
416
417 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL));
418}
419
|
413void
414in6_pcbdisconnect(struct inpcb *inp)
415{
416
417 INP_WLOCK_ASSERT(inp);
418 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
419
420 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
421 inp->inp_fport = 0;
422 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
423 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
424 in_pcbrehash(inp);
425}
426
427struct sockaddr *
428in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
429{
430 struct sockaddr_in6 *sin6;
431
432 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
433 bzero(sin6, sizeof *sin6);
434 sin6->sin6_family = AF_INET6;
435 sin6->sin6_len = sizeof(*sin6);
436 sin6->sin6_port = port;
437 sin6->sin6_addr = *addr_p;
438 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
439
440 return (struct sockaddr *)sin6;
441}
442
443struct sockaddr *
444in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
445{
446 struct sockaddr_in sin;
447 struct sockaddr_in6 *sin6_p;
448
449 bzero(&sin, sizeof sin);
450 sin.sin_family = AF_INET;
451 sin.sin_len = sizeof(sin);
452 sin.sin_port = port;
453 sin.sin_addr = *addr_p;
454
455 sin6_p = malloc(sizeof *sin6_p, M_SONAME,
456 M_WAITOK);
457 in6_sin_2_v4mapsin6(&sin, sin6_p);
458
459 return (struct sockaddr *)sin6_p;
460}
461
462int
463in6_getsockaddr(struct socket *so, struct sockaddr **nam)
464{
465 register struct inpcb *inp;
466 struct in6_addr addr;
467 in_port_t port;
468
469 inp = sotoinpcb(so);
470 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
471
472 INP_RLOCK(inp);
473 port = inp->inp_lport;
474 addr = inp->in6p_laddr;
475 INP_RUNLOCK(inp);
476
477 *nam = in6_sockaddr(port, &addr);
478 return 0;
479}
480
481int
482in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
483{
484 struct inpcb *inp;
485 struct in6_addr addr;
486 in_port_t port;
487
488 inp = sotoinpcb(so);
489 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
490
491 INP_RLOCK(inp);
492 port = inp->inp_fport;
493 addr = inp->in6p_faddr;
494 INP_RUNLOCK(inp);
495
496 *nam = in6_sockaddr(port, &addr);
497 return 0;
498}
499
500int
501in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
502{
503 struct inpcb *inp;
504 int error;
505
506 inp = sotoinpcb(so);
507 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
508
509#ifdef INET
510 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
511 error = in_getsockaddr(so, nam);
512 if (error == 0)
513 in6_sin_2_v4mapsin6_in_sock(nam);
514 } else
515#endif
516 {
517 /* scope issues will be handled in in6_getsockaddr(). */
518 error = in6_getsockaddr(so, nam);
519 }
520
521 return error;
522}
523
524int
525in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
526{
527 struct inpcb *inp;
528 int error;
529
530 inp = sotoinpcb(so);
531 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
532
533#ifdef INET
534 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
535 error = in_getpeeraddr(so, nam);
536 if (error == 0)
537 in6_sin_2_v4mapsin6_in_sock(nam);
538 } else
539#endif
540 /* scope issues will be handled in in6_getpeeraddr(). */
541 error = in6_getpeeraddr(so, nam);
542
543 return error;
544}
545
546/*
547 * Pass some notification to all connections of a protocol
548 * associated with address dst. The local address and/or port numbers
549 * may be specified to limit the search. The "usual action" will be
550 * taken, depending on the ctlinput cmd. The caller must filter any
551 * cmds that are uninteresting (e.g., no error in the map).
552 * Call the protocol specific routine (if any) to report
553 * any errors for each matching socket.
554 */
555void
556in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
557 u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
558 int cmd, void *cmdarg,
559 struct inpcb *(*notify)(struct inpcb *, int))
560{
561 struct inpcb *inp, *inp_temp;
562 struct sockaddr_in6 sa6_src, *sa6_dst;
563 u_short fport = fport_arg, lport = lport_arg;
564 u_int32_t flowinfo;
565 int errno;
566
567 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
568 return;
569
570 sa6_dst = (struct sockaddr_in6 *)dst;
571 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
572 return;
573
574 /*
575 * note that src can be NULL when we get notify by local fragmentation.
576 */
577 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
578 flowinfo = sa6_src.sin6_flowinfo;
579
580 /*
581 * Redirects go to all references to the destination,
582 * and use in6_rtchange to invalidate the route cache.
583 * Dead host indications: also use in6_rtchange to invalidate
584 * the cache, and deliver the error to all the sockets.
585 * Otherwise, if we have knowledge of the local port and address,
586 * deliver only to that socket.
587 */
588 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
589 fport = 0;
590 lport = 0;
591 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
592
593 if (cmd != PRC_HOSTDEAD)
594 notify = in6_rtchange;
595 }
596 errno = inet6ctlerrmap[cmd];
597 INP_INFO_WLOCK(pcbinfo);
598 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
599 INP_WLOCK(inp);
600 if ((inp->inp_vflag & INP_IPV6) == 0) {
601 INP_WUNLOCK(inp);
602 continue;
603 }
604
605 /*
606 * If the error designates a new path MTU for a destination
607 * and the application (associated with this socket) wanted to
608 * know the value, notify. Note that we notify for all
609 * disconnected sockets if the corresponding application
610 * wanted. This is because some UDP applications keep sending
611 * sockets disconnected.
612 * XXX: should we avoid to notify the value to TCP sockets?
613 */
614 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
615 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
616 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
617 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
618 (u_int32_t *)cmdarg);
619 }
620
621 /*
622 * Detect if we should notify the error. If no source and
623 * destination ports are specifed, but non-zero flowinfo and
624 * local address match, notify the error. This is the case
625 * when the error is delivered with an encrypted buffer
626 * by ESP. Otherwise, just compare addresses and ports
627 * as usual.
628 */
629 if (lport == 0 && fport == 0 && flowinfo &&
630 inp->inp_socket != NULL &&
631 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
632 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
633 goto do_notify;
634 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
635 &sa6_dst->sin6_addr) ||
636 inp->inp_socket == 0 ||
637 (lport && inp->inp_lport != lport) ||
638 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
639 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
640 &sa6_src.sin6_addr)) ||
641 (fport && inp->inp_fport != fport)) {
642 INP_WUNLOCK(inp);
643 continue;
644 }
645
646 do_notify:
647 if (notify) {
648 if ((*notify)(inp, errno))
649 INP_WUNLOCK(inp);
650 } else
651 INP_WUNLOCK(inp);
652 }
653 INP_INFO_WUNLOCK(pcbinfo);
654}
655
656/*
657 * Lookup a PCB based on the local address and port. Caller must hold the
658 * hash lock. No inpcb locks or references are acquired.
659 */
660struct inpcb *
661in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
662 u_short lport, int lookupflags, struct ucred *cred)
663{
664 register struct inpcb *inp;
665 int matchwild = 3, wildcard;
666
667 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
668 ("%s: invalid lookup flags %d", __func__, lookupflags));
669
670 INP_HASH_WLOCK_ASSERT(pcbinfo);
671
672 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
673 struct inpcbhead *head;
674 /*
675 * Look for an unconnected (wildcard foreign addr) PCB that
676 * matches the local address and port we're looking for.
677 */
678 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
679 0, pcbinfo->ipi_hashmask)];
680 LIST_FOREACH(inp, head, inp_hash) {
681 /* XXX inp locking */
682 if ((inp->inp_vflag & INP_IPV6) == 0)
683 continue;
684 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
685 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
686 inp->inp_lport == lport) {
687 /* Found. */
688 if (cred == NULL ||
689 prison_equal_ip6(cred->cr_prison,
690 inp->inp_cred->cr_prison))
691 return (inp);
692 }
693 }
694 /*
695 * Not found.
696 */
697 return (NULL);
698 } else {
699 struct inpcbporthead *porthash;
700 struct inpcbport *phd;
701 struct inpcb *match = NULL;
702 /*
703 * Best fit PCB lookup.
704 *
705 * First see if this local port is in use by looking on the
706 * port hash list.
707 */
708 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
709 pcbinfo->ipi_porthashmask)];
710 LIST_FOREACH(phd, porthash, phd_hash) {
711 if (phd->phd_port == lport)
712 break;
713 }
714 if (phd != NULL) {
715 /*
716 * Port is in use by one or more PCBs. Look for best
717 * fit.
718 */
719 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
720 wildcard = 0;
721 if (cred != NULL &&
722 !prison_equal_ip6(cred->cr_prison,
723 inp->inp_cred->cr_prison))
724 continue;
725 /* XXX inp locking */
726 if ((inp->inp_vflag & INP_IPV6) == 0)
727 continue;
728 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
729 wildcard++;
730 if (!IN6_IS_ADDR_UNSPECIFIED(
731 &inp->in6p_laddr)) {
732 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
733 wildcard++;
734 else if (!IN6_ARE_ADDR_EQUAL(
735 &inp->in6p_laddr, laddr))
736 continue;
737 } else {
738 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
739 wildcard++;
740 }
741 if (wildcard < matchwild) {
742 match = inp;
743 matchwild = wildcard;
744 if (matchwild == 0)
745 break;
746 }
747 }
748 }
749 return (match);
750 }
751}
752
753void
754in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
755{
756 struct inpcb *in6p;
757 struct ip6_moptions *im6o;
758 int i, gap;
759
760 INP_INFO_RLOCK(pcbinfo);
761 LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
762 INP_WLOCK(in6p);
763 im6o = in6p->in6p_moptions;
764 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) {
765 /*
766 * Unselect the outgoing ifp for multicast if it
767 * is being detached.
768 */
769 if (im6o->im6o_multicast_ifp == ifp)
770 im6o->im6o_multicast_ifp = NULL;
771 /*
772 * Drop multicast group membership if we joined
773 * through the interface being detached.
774 */
775 gap = 0;
776 for (i = 0; i < im6o->im6o_num_memberships; i++) {
777 if (im6o->im6o_membership[i]->in6m_ifp ==
778 ifp) {
779 in6_mc_leave(im6o->im6o_membership[i],
780 NULL);
781 gap++;
782 } else if (gap != 0) {
783 im6o->im6o_membership[i - gap] =
784 im6o->im6o_membership[i];
785 }
786 }
787 im6o->im6o_num_memberships -= gap;
788 }
789 INP_WUNLOCK(in6p);
790 }
791 INP_INFO_RUNLOCK(pcbinfo);
792}
793
794/*
795 * Check for alternatives when higher level complains
796 * about service problems. For now, invalidate cached
797 * routing information. If the route was created dynamically
798 * (by a redirect), time to try a default gateway again.
799 */
800void
801in6_losing(struct inpcb *in6p)
802{
803
804 /*
805 * We don't store route pointers in the routing table anymore
806 */
807 return;
808}
809
810/*
811 * After a routing change, flush old routing
812 * and allocate a (hopefully) better one.
813 */
814struct inpcb *
815in6_rtchange(struct inpcb *inp, int errno)
816{
817 /*
818 * We don't store route pointers in the routing table anymore
819 */
820 return inp;
821}
822
823/*
824 * Lookup PCB in hash list.
825 */
826struct inpcb *
827in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
828 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
829 int lookupflags, struct ifnet *ifp)
830{
831 struct inpcbhead *head;
832 struct inpcb *inp, *tmpinp;
833 u_short fport = fport_arg, lport = lport_arg;
834 int faith;
835
836 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
837 ("%s: invalid lookup flags %d", __func__, lookupflags));
838
839 INP_HASH_LOCK_ASSERT(pcbinfo);
840
841 if (faithprefix_p != NULL)
842 faith = (*faithprefix_p)(laddr);
843 else
844 faith = 0;
845
846 /*
847 * First look for an exact match.
848 */
849 tmpinp = NULL;
850 head = &pcbinfo->ipi_hashbase[
851 INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
852 pcbinfo->ipi_hashmask)];
853 LIST_FOREACH(inp, head, inp_hash) {
854 /* XXX inp locking */
855 if ((inp->inp_vflag & INP_IPV6) == 0)
856 continue;
857 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
858 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
859 inp->inp_fport == fport &&
860 inp->inp_lport == lport) {
861 /*
862 * XXX We should be able to directly return
863 * the inp here, without any checks.
864 * Well unless both bound with SO_REUSEPORT?
865 */
866 if (prison_flag(inp->inp_cred, PR_IP6))
867 return (inp);
868 if (tmpinp == NULL)
869 tmpinp = inp;
870 }
871 }
872 if (tmpinp != NULL)
873 return (tmpinp);
874
875 /*
876 * Then look for a wildcard match, if requested.
877 */
878 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
879 struct inpcb *local_wild = NULL, *local_exact = NULL;
880 struct inpcb *jail_wild = NULL;
881 int injail;
882
883 /*
884 * Order of socket selection - we always prefer jails.
885 * 1. jailed, non-wild.
886 * 2. jailed, wild.
887 * 3. non-jailed, non-wild.
888 * 4. non-jailed, wild.
889 */
890 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
891 0, pcbinfo->ipi_hashmask)];
892 LIST_FOREACH(inp, head, inp_hash) {
893 /* XXX inp locking */
894 if ((inp->inp_vflag & INP_IPV6) == 0)
895 continue;
896
897 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
898 inp->inp_lport != lport) {
899 continue;
900 }
901
902 /* XXX inp locking */
903 if (faith && (inp->inp_flags & INP_FAITH) == 0)
904 continue;
905
906 injail = prison_flag(inp->inp_cred, PR_IP6);
907 if (injail) {
908 if (prison_check_ip6(inp->inp_cred,
909 laddr) != 0)
910 continue;
911 } else {
912 if (local_exact != NULL)
913 continue;
914 }
915
916 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
917 if (injail)
918 return (inp);
919 else
920 local_exact = inp;
921 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
922 if (injail)
923 jail_wild = inp;
924 else
925 local_wild = inp;
926 }
927 } /* LIST_FOREACH */
928
929 if (jail_wild != NULL)
930 return (jail_wild);
931 if (local_exact != NULL)
932 return (local_exact);
933 if (local_wild != NULL)
934 return (local_wild);
935 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
936
937 /*
938 * Not found.
939 */
940 return (NULL);
941}
942
943/*
944 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the
945 * hash list lock, and will return the inpcb locked (i.e., requires
946 * INPLOOKUP_LOCKPCB).
947 */
948static struct inpcb *
949in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
950 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
951 struct ifnet *ifp)
952{
953 struct inpcb *inp;
954
955 INP_HASH_RLOCK(pcbinfo);
956 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
957 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
958 if (inp != NULL) {
959 in_pcbref(inp);
960 INP_HASH_RUNLOCK(pcbinfo);
961 if (lookupflags & INPLOOKUP_WLOCKPCB) {
962 INP_WLOCK(inp);
963 if (in_pcbrele_wlocked(inp))
964 return (NULL);
965 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
966 INP_RLOCK(inp);
967 if (in_pcbrele_rlocked(inp))
968 return (NULL);
969 } else
970 panic("%s: locking bug", __func__);
971 } else
972 INP_HASH_RUNLOCK(pcbinfo);
973 return (inp);
974}
975
976/*
| 420void
421in6_pcbdisconnect(struct inpcb *inp)
422{
423
424 INP_WLOCK_ASSERT(inp);
425 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
426
427 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
428 inp->inp_fport = 0;
429 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
430 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
431 in_pcbrehash(inp);
432}
433
434struct sockaddr *
435in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
436{
437 struct sockaddr_in6 *sin6;
438
439 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK);
440 bzero(sin6, sizeof *sin6);
441 sin6->sin6_family = AF_INET6;
442 sin6->sin6_len = sizeof(*sin6);
443 sin6->sin6_port = port;
444 sin6->sin6_addr = *addr_p;
445 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */
446
447 return (struct sockaddr *)sin6;
448}
449
450struct sockaddr *
451in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
452{
453 struct sockaddr_in sin;
454 struct sockaddr_in6 *sin6_p;
455
456 bzero(&sin, sizeof sin);
457 sin.sin_family = AF_INET;
458 sin.sin_len = sizeof(sin);
459 sin.sin_port = port;
460 sin.sin_addr = *addr_p;
461
462 sin6_p = malloc(sizeof *sin6_p, M_SONAME,
463 M_WAITOK);
464 in6_sin_2_v4mapsin6(&sin, sin6_p);
465
466 return (struct sockaddr *)sin6_p;
467}
468
469int
470in6_getsockaddr(struct socket *so, struct sockaddr **nam)
471{
472 register struct inpcb *inp;
473 struct in6_addr addr;
474 in_port_t port;
475
476 inp = sotoinpcb(so);
477 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
478
479 INP_RLOCK(inp);
480 port = inp->inp_lport;
481 addr = inp->in6p_laddr;
482 INP_RUNLOCK(inp);
483
484 *nam = in6_sockaddr(port, &addr);
485 return 0;
486}
487
488int
489in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
490{
491 struct inpcb *inp;
492 struct in6_addr addr;
493 in_port_t port;
494
495 inp = sotoinpcb(so);
496 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
497
498 INP_RLOCK(inp);
499 port = inp->inp_fport;
500 addr = inp->in6p_faddr;
501 INP_RUNLOCK(inp);
502
503 *nam = in6_sockaddr(port, &addr);
504 return 0;
505}
506
507int
508in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
509{
510 struct inpcb *inp;
511 int error;
512
513 inp = sotoinpcb(so);
514 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
515
516#ifdef INET
517 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
518 error = in_getsockaddr(so, nam);
519 if (error == 0)
520 in6_sin_2_v4mapsin6_in_sock(nam);
521 } else
522#endif
523 {
524 /* scope issues will be handled in in6_getsockaddr(). */
525 error = in6_getsockaddr(so, nam);
526 }
527
528 return error;
529}
530
531int
532in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
533{
534 struct inpcb *inp;
535 int error;
536
537 inp = sotoinpcb(so);
538 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
539
540#ifdef INET
541 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
542 error = in_getpeeraddr(so, nam);
543 if (error == 0)
544 in6_sin_2_v4mapsin6_in_sock(nam);
545 } else
546#endif
547 /* scope issues will be handled in in6_getpeeraddr(). */
548 error = in6_getpeeraddr(so, nam);
549
550 return error;
551}
552
553/*
554 * Pass some notification to all connections of a protocol
555 * associated with address dst. The local address and/or port numbers
556 * may be specified to limit the search. The "usual action" will be
557 * taken, depending on the ctlinput cmd. The caller must filter any
558 * cmds that are uninteresting (e.g., no error in the map).
559 * Call the protocol specific routine (if any) to report
560 * any errors for each matching socket.
561 */
562void
563in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
564 u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
565 int cmd, void *cmdarg,
566 struct inpcb *(*notify)(struct inpcb *, int))
567{
568 struct inpcb *inp, *inp_temp;
569 struct sockaddr_in6 sa6_src, *sa6_dst;
570 u_short fport = fport_arg, lport = lport_arg;
571 u_int32_t flowinfo;
572 int errno;
573
574 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
575 return;
576
577 sa6_dst = (struct sockaddr_in6 *)dst;
578 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
579 return;
580
581 /*
582 * note that src can be NULL when we get notify by local fragmentation.
583 */
584 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
585 flowinfo = sa6_src.sin6_flowinfo;
586
587 /*
588 * Redirects go to all references to the destination,
589 * and use in6_rtchange to invalidate the route cache.
590 * Dead host indications: also use in6_rtchange to invalidate
591 * the cache, and deliver the error to all the sockets.
592 * Otherwise, if we have knowledge of the local port and address,
593 * deliver only to that socket.
594 */
595 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
596 fport = 0;
597 lport = 0;
598 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
599
600 if (cmd != PRC_HOSTDEAD)
601 notify = in6_rtchange;
602 }
603 errno = inet6ctlerrmap[cmd];
604 INP_INFO_WLOCK(pcbinfo);
605 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
606 INP_WLOCK(inp);
607 if ((inp->inp_vflag & INP_IPV6) == 0) {
608 INP_WUNLOCK(inp);
609 continue;
610 }
611
612 /*
613 * If the error designates a new path MTU for a destination
614 * and the application (associated with this socket) wanted to
615 * know the value, notify. Note that we notify for all
616 * disconnected sockets if the corresponding application
617 * wanted. This is because some UDP applications keep sending
618 * sockets disconnected.
619 * XXX: should we avoid to notify the value to TCP sockets?
620 */
621 if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
622 (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
623 IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
624 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
625 (u_int32_t *)cmdarg);
626 }
627
628 /*
629 * Detect if we should notify the error. If no source and
630 * destination ports are specifed, but non-zero flowinfo and
631 * local address match, notify the error. This is the case
632 * when the error is delivered with an encrypted buffer
633 * by ESP. Otherwise, just compare addresses and ports
634 * as usual.
635 */
636 if (lport == 0 && fport == 0 && flowinfo &&
637 inp->inp_socket != NULL &&
638 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
639 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
640 goto do_notify;
641 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
642 &sa6_dst->sin6_addr) ||
643 inp->inp_socket == 0 ||
644 (lport && inp->inp_lport != lport) ||
645 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
646 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
647 &sa6_src.sin6_addr)) ||
648 (fport && inp->inp_fport != fport)) {
649 INP_WUNLOCK(inp);
650 continue;
651 }
652
653 do_notify:
654 if (notify) {
655 if ((*notify)(inp, errno))
656 INP_WUNLOCK(inp);
657 } else
658 INP_WUNLOCK(inp);
659 }
660 INP_INFO_WUNLOCK(pcbinfo);
661}
662
663/*
664 * Lookup a PCB based on the local address and port. Caller must hold the
665 * hash lock. No inpcb locks or references are acquired.
666 */
667struct inpcb *
668in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
669 u_short lport, int lookupflags, struct ucred *cred)
670{
671 register struct inpcb *inp;
672 int matchwild = 3, wildcard;
673
674 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
675 ("%s: invalid lookup flags %d", __func__, lookupflags));
676
677 INP_HASH_WLOCK_ASSERT(pcbinfo);
678
679 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
680 struct inpcbhead *head;
681 /*
682 * Look for an unconnected (wildcard foreign addr) PCB that
683 * matches the local address and port we're looking for.
684 */
685 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
686 0, pcbinfo->ipi_hashmask)];
687 LIST_FOREACH(inp, head, inp_hash) {
688 /* XXX inp locking */
689 if ((inp->inp_vflag & INP_IPV6) == 0)
690 continue;
691 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
692 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
693 inp->inp_lport == lport) {
694 /* Found. */
695 if (cred == NULL ||
696 prison_equal_ip6(cred->cr_prison,
697 inp->inp_cred->cr_prison))
698 return (inp);
699 }
700 }
701 /*
702 * Not found.
703 */
704 return (NULL);
705 } else {
706 struct inpcbporthead *porthash;
707 struct inpcbport *phd;
708 struct inpcb *match = NULL;
709 /*
710 * Best fit PCB lookup.
711 *
712 * First see if this local port is in use by looking on the
713 * port hash list.
714 */
715 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
716 pcbinfo->ipi_porthashmask)];
717 LIST_FOREACH(phd, porthash, phd_hash) {
718 if (phd->phd_port == lport)
719 break;
720 }
721 if (phd != NULL) {
722 /*
723 * Port is in use by one or more PCBs. Look for best
724 * fit.
725 */
726 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
727 wildcard = 0;
728 if (cred != NULL &&
729 !prison_equal_ip6(cred->cr_prison,
730 inp->inp_cred->cr_prison))
731 continue;
732 /* XXX inp locking */
733 if ((inp->inp_vflag & INP_IPV6) == 0)
734 continue;
735 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
736 wildcard++;
737 if (!IN6_IS_ADDR_UNSPECIFIED(
738 &inp->in6p_laddr)) {
739 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
740 wildcard++;
741 else if (!IN6_ARE_ADDR_EQUAL(
742 &inp->in6p_laddr, laddr))
743 continue;
744 } else {
745 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
746 wildcard++;
747 }
748 if (wildcard < matchwild) {
749 match = inp;
750 matchwild = wildcard;
751 if (matchwild == 0)
752 break;
753 }
754 }
755 }
756 return (match);
757 }
758}
759
760void
761in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
762{
763 struct inpcb *in6p;
764 struct ip6_moptions *im6o;
765 int i, gap;
766
767 INP_INFO_RLOCK(pcbinfo);
768 LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
769 INP_WLOCK(in6p);
770 im6o = in6p->in6p_moptions;
771 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) {
772 /*
773 * Unselect the outgoing ifp for multicast if it
774 * is being detached.
775 */
776 if (im6o->im6o_multicast_ifp == ifp)
777 im6o->im6o_multicast_ifp = NULL;
778 /*
779 * Drop multicast group membership if we joined
780 * through the interface being detached.
781 */
782 gap = 0;
783 for (i = 0; i < im6o->im6o_num_memberships; i++) {
784 if (im6o->im6o_membership[i]->in6m_ifp ==
785 ifp) {
786 in6_mc_leave(im6o->im6o_membership[i],
787 NULL);
788 gap++;
789 } else if (gap != 0) {
790 im6o->im6o_membership[i - gap] =
791 im6o->im6o_membership[i];
792 }
793 }
794 im6o->im6o_num_memberships -= gap;
795 }
796 INP_WUNLOCK(in6p);
797 }
798 INP_INFO_RUNLOCK(pcbinfo);
799}
800
801/*
802 * Check for alternatives when higher level complains
803 * about service problems. For now, invalidate cached
804 * routing information. If the route was created dynamically
805 * (by a redirect), time to try a default gateway again.
806 */
807void
808in6_losing(struct inpcb *in6p)
809{
810
811 /*
812 * We don't store route pointers in the routing table anymore
813 */
814 return;
815}
816
817/*
818 * After a routing change, flush old routing
819 * and allocate a (hopefully) better one.
820 */
821struct inpcb *
822in6_rtchange(struct inpcb *inp, int errno)
823{
824 /*
825 * We don't store route pointers in the routing table anymore
826 */
827 return inp;
828}
829
830/*
831 * Lookup PCB in hash list.
832 */
833struct inpcb *
834in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
835 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
836 int lookupflags, struct ifnet *ifp)
837{
838 struct inpcbhead *head;
839 struct inpcb *inp, *tmpinp;
840 u_short fport = fport_arg, lport = lport_arg;
841 int faith;
842
843 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
844 ("%s: invalid lookup flags %d", __func__, lookupflags));
845
846 INP_HASH_LOCK_ASSERT(pcbinfo);
847
848 if (faithprefix_p != NULL)
849 faith = (*faithprefix_p)(laddr);
850 else
851 faith = 0;
852
853 /*
854 * First look for an exact match.
855 */
856 tmpinp = NULL;
857 head = &pcbinfo->ipi_hashbase[
858 INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
859 pcbinfo->ipi_hashmask)];
860 LIST_FOREACH(inp, head, inp_hash) {
861 /* XXX inp locking */
862 if ((inp->inp_vflag & INP_IPV6) == 0)
863 continue;
864 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
865 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
866 inp->inp_fport == fport &&
867 inp->inp_lport == lport) {
868 /*
869 * XXX We should be able to directly return
870 * the inp here, without any checks.
871 * Well unless both bound with SO_REUSEPORT?
872 */
873 if (prison_flag(inp->inp_cred, PR_IP6))
874 return (inp);
875 if (tmpinp == NULL)
876 tmpinp = inp;
877 }
878 }
879 if (tmpinp != NULL)
880 return (tmpinp);
881
882 /*
883 * Then look for a wildcard match, if requested.
884 */
885 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
886 struct inpcb *local_wild = NULL, *local_exact = NULL;
887 struct inpcb *jail_wild = NULL;
888 int injail;
889
890 /*
891 * Order of socket selection - we always prefer jails.
892 * 1. jailed, non-wild.
893 * 2. jailed, wild.
894 * 3. non-jailed, non-wild.
895 * 4. non-jailed, wild.
896 */
897 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
898 0, pcbinfo->ipi_hashmask)];
899 LIST_FOREACH(inp, head, inp_hash) {
900 /* XXX inp locking */
901 if ((inp->inp_vflag & INP_IPV6) == 0)
902 continue;
903
904 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
905 inp->inp_lport != lport) {
906 continue;
907 }
908
909 /* XXX inp locking */
910 if (faith && (inp->inp_flags & INP_FAITH) == 0)
911 continue;
912
913 injail = prison_flag(inp->inp_cred, PR_IP6);
914 if (injail) {
915 if (prison_check_ip6(inp->inp_cred,
916 laddr) != 0)
917 continue;
918 } else {
919 if (local_exact != NULL)
920 continue;
921 }
922
923 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) {
924 if (injail)
925 return (inp);
926 else
927 local_exact = inp;
928 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
929 if (injail)
930 jail_wild = inp;
931 else
932 local_wild = inp;
933 }
934 } /* LIST_FOREACH */
935
936 if (jail_wild != NULL)
937 return (jail_wild);
938 if (local_exact != NULL)
939 return (local_exact);
940 if (local_wild != NULL)
941 return (local_wild);
942 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
943
944 /*
945 * Not found.
946 */
947 return (NULL);
948}
949
950/*
951 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the
952 * hash list lock, and will return the inpcb locked (i.e., requires
953 * INPLOOKUP_LOCKPCB).
954 */
955static struct inpcb *
956in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
957 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
958 struct ifnet *ifp)
959{
960 struct inpcb *inp;
961
962 INP_HASH_RLOCK(pcbinfo);
963 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
964 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
965 if (inp != NULL) {
966 in_pcbref(inp);
967 INP_HASH_RUNLOCK(pcbinfo);
968 if (lookupflags & INPLOOKUP_WLOCKPCB) {
969 INP_WLOCK(inp);
970 if (in_pcbrele_wlocked(inp))
971 return (NULL);
972 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
973 INP_RLOCK(inp);
974 if (in_pcbrele_rlocked(inp))
975 return (NULL);
976 } else
977 panic("%s: locking bug", __func__);
978 } else
979 INP_HASH_RUNLOCK(pcbinfo);
980 return (inp);
981}
982
983/*
|
977 * Public inpcb lookup routines, accepting a 4-tuple.
| 984 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
985 * from which a pre-calculated hash value may be extracted.
|
978 */
979struct inpcb *
980in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
981 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
982{
| 986 */
987struct inpcb *
988in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport,
989 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp)
990{
|
| 991 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
992 ("%s: invalid lookup flags %d", __func__, lookupflags));
993 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
994 ("%s: LOCKPCB not set", __func__));
|
983
| 995
|
| 996 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
997 lookupflags, ifp));
998}
999
1000struct inpcb *
1001in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
1002 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags,
1003 struct ifnet *ifp, struct mbuf *m)
1004{
|
984 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
985 ("%s: invalid lookup flags %d", __func__, lookupflags));
986 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
987 ("%s: LOCKPCB not set", __func__));
988
989 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
990 lookupflags, ifp));
991}
992
993void
994init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
995{
996 struct ip6_hdr *ip;
997
998 ip = mtod(m, struct ip6_hdr *);
999 bzero(sin6, sizeof(*sin6));
1000 sin6->sin6_len = sizeof(*sin6);
1001 sin6->sin6_family = AF_INET6;
1002 sin6->sin6_addr = ip->ip6_src;
1003
1004 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1005
1006 return;
1007}
| 1005 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1006 ("%s: invalid lookup flags %d", __func__, lookupflags));
1007 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1008 ("%s: LOCKPCB not set", __func__));
1009
1010 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1011 lookupflags, ifp));
1012}
1013
1014void
1015init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1016{
1017 struct ip6_hdr *ip;
1018
1019 ip = mtod(m, struct ip6_hdr *);
1020 bzero(sin6, sizeof(*sin6));
1021 sin6->sin6_len = sizeof(*sin6);
1022 sin6->sin6_family = AF_INET6;
1023 sin6->sin6_addr = ip->ip6_src;
1024
1025 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
1026
1027 return;
1028}
|