1 | /* $NetBSD: in6_pcb.c,v 1.152 2016/10/31 14:34:32 christos Exp $ */ |
2 | /* $KAME: in6_pcb.c,v 1.84 2001/02/08 18:02:08 itojun Exp $ */ |
3 | |
4 | /* |
5 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
6 | * All rights reserved. |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions |
10 | * are met: |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. |
13 | * 2. Redistributions in binary form must reproduce the above copyright |
14 | * notice, this list of conditions and the following disclaimer in the |
15 | * documentation and/or other materials provided with the distribution. |
16 | * 3. Neither the name of the project nor the names of its contributors |
17 | * may be used to endorse or promote products derived from this software |
18 | * without specific prior written permission. |
19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
30 | * SUCH DAMAGE. |
31 | */ |
32 | |
33 | /* |
34 | * Copyright (c) 1982, 1986, 1991, 1993 |
35 | * The Regents of the University of California. All rights reserved. |
36 | * |
37 | * Redistribution and use in source and binary forms, with or without |
38 | * modification, are permitted provided that the following conditions |
39 | * are met: |
40 | * 1. Redistributions of source code must retain the above copyright |
41 | * notice, this list of conditions and the following disclaimer. |
42 | * 2. Redistributions in binary form must reproduce the above copyright |
43 | * notice, this list of conditions and the following disclaimer in the |
44 | * documentation and/or other materials provided with the distribution. |
45 | * 3. Neither the name of the University nor the names of its contributors |
46 | * may be used to endorse or promote products derived from this software |
47 | * without specific prior written permission. |
48 | * |
49 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
50 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
51 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
52 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
53 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
54 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
55 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
56 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
57 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
58 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
59 | * SUCH DAMAGE. |
60 | * |
61 | * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 |
62 | */ |
63 | |
64 | #include <sys/cdefs.h> |
65 | __KERNEL_RCSID(0, "$NetBSD: in6_pcb.c,v 1.152 2016/10/31 14:34:32 christos Exp $" ); |
66 | |
67 | #ifdef _KERNEL_OPT |
68 | #include "opt_inet.h" |
69 | #include "opt_ipsec.h" |
70 | #endif |
71 | |
72 | #include <sys/param.h> |
73 | #include <sys/systm.h> |
74 | #include <sys/mbuf.h> |
75 | #include <sys/protosw.h> |
76 | #include <sys/socket.h> |
77 | #include <sys/socketvar.h> |
78 | #include <sys/ioctl.h> |
79 | #include <sys/errno.h> |
80 | #include <sys/time.h> |
81 | #include <sys/proc.h> |
82 | #include <sys/kauth.h> |
83 | #include <sys/domain.h> |
84 | #include <sys/once.h> |
85 | |
86 | #include <net/if.h> |
87 | #include <net/route.h> |
88 | |
89 | #include <netinet/in.h> |
90 | #include <netinet/in_var.h> |
91 | #include <netinet/in_systm.h> |
92 | #include <netinet/ip.h> |
93 | #include <netinet/in_pcb.h> |
94 | #include <netinet/ip6.h> |
95 | #include <netinet/portalgo.h> |
96 | #include <netinet6/ip6_var.h> |
97 | #include <netinet6/in6_pcb.h> |
98 | #include <netinet6/scope6_var.h> |
99 | #include <netinet6/nd6.h> |
100 | |
101 | #include "faith.h" |
102 | |
103 | #ifdef IPSEC |
104 | #include <netipsec/ipsec.h> |
105 | #include <netipsec/ipsec6.h> |
106 | #include <netipsec/key.h> |
107 | #endif /* IPSEC */ |
108 | |
109 | #include <netinet/tcp_vtw.h> |
110 | |
111 | const struct in6_addr zeroin6_addr; |
112 | |
113 | #define IN6PCBHASH_PORT(table, lport) \ |
114 | &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash] |
115 | #define IN6PCBHASH_BIND(table, laddr, lport) \ |
116 | &(table)->inpt_bindhashtbl[ \ |
117 | (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ |
118 | (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + ntohs(lport)) & \ |
119 | (table)->inpt_bindhash] |
120 | #define IN6PCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ |
121 | &(table)->inpt_bindhashtbl[ \ |
122 | ((((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \ |
123 | (faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3]) + ntohs(fport)) + \ |
124 | (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ |
125 | (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + \ |
126 | ntohs(lport))) & (table)->inpt_bindhash] |
127 | |
128 | int ip6_anonportmin = IPV6PORT_ANONMIN; |
129 | int ip6_anonportmax = IPV6PORT_ANONMAX; |
130 | int ip6_lowportmin = IPV6PORT_RESERVEDMIN; |
131 | int ip6_lowportmax = IPV6PORT_RESERVEDMAX; |
132 | |
133 | static struct pool in6pcb_pool; |
134 | |
135 | static int |
136 | in6pcb_poolinit(void) |
137 | { |
138 | |
139 | pool_init(&in6pcb_pool, sizeof(struct in6pcb), 0, 0, 0, "in6pcbpl" , |
140 | NULL, IPL_SOFTNET); |
141 | return 0; |
142 | } |
143 | |
144 | void |
145 | in6_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize) |
146 | { |
147 | static ONCE_DECL(control); |
148 | |
149 | in_pcbinit(table, bindhashsize, connecthashsize); |
150 | table->inpt_lastport = (u_int16_t)ip6_anonportmax; |
151 | |
152 | RUN_ONCE(&control, in6pcb_poolinit); |
153 | } |
154 | |
155 | int |
156 | in6_pcballoc(struct socket *so, void *v) |
157 | { |
158 | struct inpcbtable *table = v; |
159 | struct in6pcb *in6p; |
160 | int s; |
161 | |
162 | s = splnet(); |
163 | in6p = pool_get(&in6pcb_pool, PR_NOWAIT); |
164 | splx(s); |
165 | if (in6p == NULL) |
166 | return (ENOBUFS); |
167 | memset((void *)in6p, 0, sizeof(*in6p)); |
168 | in6p->in6p_af = AF_INET6; |
169 | in6p->in6p_table = table; |
170 | in6p->in6p_socket = so; |
171 | in6p->in6p_hops = -1; /* use kernel default */ |
172 | in6p->in6p_icmp6filt = NULL; |
173 | in6p->in6p_portalgo = PORTALGO_DEFAULT; |
174 | in6p->in6p_bindportonsend = false; |
175 | #if defined(IPSEC) |
176 | if (ipsec_enabled) { |
177 | int error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp); |
178 | if (error != 0) { |
179 | s = splnet(); |
180 | pool_put(&in6pcb_pool, in6p); |
181 | splx(s); |
182 | return error; |
183 | } |
184 | } |
185 | #endif /* IPSEC */ |
186 | s = splnet(); |
187 | TAILQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p, |
188 | inph_queue); |
189 | LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), |
190 | &in6p->in6p_head, inph_lhash); |
191 | in6_pcbstate(in6p, IN6P_ATTACHED); |
192 | splx(s); |
193 | if (ip6_v6only) |
194 | in6p->in6p_flags |= IN6P_IPV6_V6ONLY; |
195 | so->so_pcb = (void *)in6p; |
196 | return (0); |
197 | } |
198 | |
199 | /* |
200 | * Bind address from sin6 to in6p. |
201 | */ |
202 | static int |
203 | in6_pcbbind_addr(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) |
204 | { |
205 | int error; |
206 | int s; |
207 | |
208 | /* |
209 | * We should check the family, but old programs |
210 | * incorrectly fail to intialize it. |
211 | */ |
212 | if (sin6->sin6_family != AF_INET6) |
213 | return (EAFNOSUPPORT); |
214 | |
215 | #ifndef INET |
216 | if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) |
217 | return (EADDRNOTAVAIL); |
218 | #endif |
219 | |
220 | if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) |
221 | return (error); |
222 | |
223 | s = pserialize_read_enter(); |
224 | if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { |
225 | if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) { |
226 | error = EINVAL; |
227 | goto out; |
228 | } |
229 | if (sin6->sin6_addr.s6_addr32[3]) { |
230 | struct sockaddr_in sin; |
231 | |
232 | memset(&sin, 0, sizeof(sin)); |
233 | sin.sin_len = sizeof(sin); |
234 | sin.sin_family = AF_INET; |
235 | bcopy(&sin6->sin6_addr.s6_addr32[3], |
236 | &sin.sin_addr, sizeof(sin.sin_addr)); |
237 | if (!IN_MULTICAST(sin.sin_addr.s_addr)) { |
238 | struct ifaddr *ifa; |
239 | ifa = ifa_ifwithaddr((struct sockaddr *)&sin); |
240 | if (ifa == NULL) { |
241 | error = EADDRNOTAVAIL; |
242 | goto out; |
243 | } |
244 | } |
245 | } |
246 | } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { |
247 | // succeed |
248 | } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { |
249 | struct ifaddr *ifa = NULL; |
250 | |
251 | if ((in6p->in6p_flags & IN6P_FAITH) == 0) { |
252 | ifa = ifa_ifwithaddr(sin6tosa(sin6)); |
253 | if (ifa == NULL) { |
254 | error = EADDRNOTAVAIL; |
255 | goto out; |
256 | } |
257 | } |
258 | |
259 | /* |
260 | * bind to an anycast address might accidentally |
261 | * cause sending a packet with an anycast source |
262 | * address, so we forbid it. |
263 | * |
264 | * We should allow to bind to a deprecated address, |
265 | * since the application dare to use it. |
266 | * But, can we assume that they are careful enough |
267 | * to check if the address is deprecated or not? |
268 | * Maybe, as a safeguard, we should have a setsockopt |
269 | * flag to control the bind(2) behavior against |
270 | * deprecated addresses (default: forbid bind(2)). |
271 | */ |
272 | if (ifa && |
273 | ifatoia6(ifa)->ia6_flags & |
274 | (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED)) { |
275 | error = EADDRNOTAVAIL; |
276 | goto out; |
277 | } |
278 | } |
279 | in6p->in6p_laddr = sin6->sin6_addr; |
280 | error = 0; |
281 | out: |
282 | pserialize_read_exit(s); |
283 | return error; |
284 | } |
285 | |
286 | /* |
287 | * Bind port from sin6 to in6p. |
288 | */ |
289 | static int |
290 | in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) |
291 | { |
292 | struct inpcbtable *table = in6p->in6p_table; |
293 | struct socket *so = in6p->in6p_socket; |
294 | int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); |
295 | int error; |
296 | |
297 | if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && |
298 | ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || |
299 | (so->so_options & SO_ACCEPTCONN) == 0)) |
300 | wild = 1; |
301 | |
302 | if (sin6->sin6_port != 0) { |
303 | enum kauth_network_req req; |
304 | |
305 | #ifndef IPNOPRIVPORTS |
306 | if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED) |
307 | req = KAUTH_REQ_NETWORK_BIND_PRIVPORT; |
308 | else |
309 | #endif /* IPNOPRIVPORTS */ |
310 | req = KAUTH_REQ_NETWORK_BIND_PORT; |
311 | |
312 | error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND, |
313 | req, so, sin6, NULL); |
314 | if (error) |
315 | return (EACCES); |
316 | } |
317 | |
318 | if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { |
319 | /* |
320 | * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; |
321 | * allow compepte duplication of binding if |
322 | * SO_REUSEPORT is set, or if SO_REUSEADDR is set |
323 | * and a multicast address is bound on both |
324 | * new and duplicated sockets. |
325 | */ |
326 | if (so->so_options & (SO_REUSEADDR | SO_REUSEPORT)) |
327 | reuseport = SO_REUSEADDR|SO_REUSEPORT; |
328 | } |
329 | |
330 | if (sin6->sin6_port != 0) { |
331 | if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { |
332 | #ifdef INET |
333 | struct inpcb *t; |
334 | struct vestigial_inpcb vestige; |
335 | |
336 | t = in_pcblookup_port(table, |
337 | *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3], |
338 | sin6->sin6_port, wild, &vestige); |
339 | if (t && (reuseport & t->inp_socket->so_options) == 0) |
340 | return (EADDRINUSE); |
341 | if (!t |
342 | && vestige.valid |
343 | && !(reuseport && vestige.reuse_port)) |
344 | return EADDRINUSE; |
345 | #else |
346 | return (EADDRNOTAVAIL); |
347 | #endif |
348 | } |
349 | |
350 | { |
351 | struct in6pcb *t; |
352 | struct vestigial_inpcb vestige; |
353 | |
354 | t = in6_pcblookup_port(table, &sin6->sin6_addr, |
355 | sin6->sin6_port, wild, &vestige); |
356 | if (t && (reuseport & t->in6p_socket->so_options) == 0) |
357 | return (EADDRINUSE); |
358 | if (!t |
359 | && vestige.valid |
360 | && !(reuseport && vestige.reuse_port)) |
361 | return EADDRINUSE; |
362 | } |
363 | } |
364 | |
365 | if (sin6->sin6_port == 0) { |
366 | int e; |
367 | e = in6_pcbsetport(sin6, in6p, l); |
368 | if (e != 0) |
369 | return (e); |
370 | } else { |
371 | in6p->in6p_lport = sin6->sin6_port; |
372 | in6_pcbstate(in6p, IN6P_BOUND); |
373 | } |
374 | |
375 | LIST_REMOVE(&in6p->in6p_head, inph_lhash); |
376 | LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), |
377 | &in6p->in6p_head, inph_lhash); |
378 | |
379 | return (0); |
380 | } |
381 | |
382 | int |
383 | in6_pcbbind(void *v, struct sockaddr_in6 *sin6, struct lwp *l) |
384 | { |
385 | struct in6pcb *in6p = v; |
386 | struct sockaddr_in6 lsin6; |
387 | int error; |
388 | |
389 | if (in6p->in6p_af != AF_INET6) |
390 | return (EINVAL); |
391 | |
392 | /* |
393 | * If we already have a local port or a local address it means we're |
394 | * bounded. |
395 | */ |
396 | if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || |
397 | (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && |
398 | in6p->in6p_laddr.s6_addr32[3] == 0))) |
399 | return (EINVAL); |
400 | |
401 | if (NULL != sin6) { |
402 | /* We were provided a sockaddr_in6 to use. */ |
403 | if (sin6->sin6_len != sizeof(*sin6)) |
404 | return (EINVAL); |
405 | } else { |
406 | /* We always bind to *something*, even if it's "anything". */ |
407 | lsin6 = *((const struct sockaddr_in6 *) |
408 | in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); |
409 | sin6 = &lsin6; |
410 | } |
411 | |
412 | /* Bind address. */ |
413 | error = in6_pcbbind_addr(in6p, sin6, l); |
414 | if (error) |
415 | return (error); |
416 | |
417 | /* Bind port. */ |
418 | error = in6_pcbbind_port(in6p, sin6, l); |
419 | if (error) { |
420 | /* |
421 | * Reset the address here to "any" so we don't "leak" the |
422 | * in6pcb. |
423 | */ |
424 | in6p->in6p_laddr = in6addr_any; |
425 | |
426 | return (error); |
427 | } |
428 | |
429 | |
430 | #if 0 |
431 | in6p->in6p_flowinfo = 0; /* XXX */ |
432 | #endif |
433 | return (0); |
434 | } |
435 | |
436 | /* |
437 | * Connect from a socket to a specified address. |
438 | * Both address and port must be specified in argument sin6. |
439 | * If don't have a local address for this socket yet, |
440 | * then pick one. |
441 | */ |
442 | int |
443 | in6_pcbconnect(void *v, struct sockaddr_in6 *sin6, struct lwp *l) |
444 | { |
445 | struct in6pcb *in6p = v; |
446 | struct in6_addr *in6a = NULL; |
447 | struct in6_addr ia6; |
448 | struct ifnet *ifp = NULL; /* outgoing interface */ |
449 | int error = 0; |
450 | int scope_ambiguous = 0; |
451 | #ifdef INET |
452 | struct in6_addr mapped; |
453 | #endif |
454 | struct sockaddr_in6 tmp; |
455 | struct vestigial_inpcb vestige; |
456 | struct psref psref; |
457 | int bound; |
458 | |
459 | (void)&in6a; /* XXX fool gcc */ |
460 | |
461 | if (in6p->in6p_af != AF_INET6) |
462 | return (EINVAL); |
463 | |
464 | if (sin6->sin6_len != sizeof(*sin6)) |
465 | return (EINVAL); |
466 | if (sin6->sin6_family != AF_INET6) |
467 | return (EAFNOSUPPORT); |
468 | if (sin6->sin6_port == 0) |
469 | return (EADDRNOTAVAIL); |
470 | |
471 | if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && |
472 | in6p->in6p_socket->so_type == SOCK_STREAM) |
473 | return EADDRNOTAVAIL; |
474 | |
475 | if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) |
476 | scope_ambiguous = 1; |
477 | if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) |
478 | return(error); |
479 | |
480 | /* sanity check for mapped address case */ |
481 | if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { |
482 | if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) |
483 | return EINVAL; |
484 | if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) |
485 | in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); |
486 | if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) |
487 | return EINVAL; |
488 | } else |
489 | { |
490 | if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) |
491 | return EINVAL; |
492 | } |
493 | |
494 | /* protect *sin6 from overwrites */ |
495 | tmp = *sin6; |
496 | sin6 = &tmp; |
497 | |
498 | bound = curlwp_bind(); |
499 | /* Source address selection. */ |
500 | if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && |
501 | in6p->in6p_laddr.s6_addr32[3] == 0) { |
502 | #ifdef INET |
503 | struct sockaddr_in sin; |
504 | struct in_ifaddr *ia4; |
505 | struct psref _psref; |
506 | |
507 | memset(&sin, 0, sizeof(sin)); |
508 | sin.sin_len = sizeof(sin); |
509 | sin.sin_family = AF_INET; |
510 | memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3], |
511 | sizeof(sin.sin_addr)); |
512 | ia4 = in_selectsrc(&sin, &in6p->in6p_route, |
513 | in6p->in6p_socket->so_options, NULL, &error, &_psref); |
514 | if (ia4 == NULL) { |
515 | if (error == 0) |
516 | error = EADDRNOTAVAIL; |
517 | return (error); |
518 | } |
519 | memset(&mapped, 0, sizeof(mapped)); |
520 | mapped.s6_addr16[5] = htons(0xffff); |
521 | memcpy(&mapped.s6_addr32[3], &IA_SIN(ia4)->sin_addr, |
522 | sizeof(IA_SIN(ia4)->sin_addr)); |
523 | ia4_release(ia4, &_psref); |
524 | in6a = &mapped; |
525 | #else |
526 | return EADDRNOTAVAIL; |
527 | #endif |
528 | } else { |
529 | /* |
530 | * XXX: in6_selectsrc might replace the bound local address |
531 | * with the address specified by setsockopt(IPV6_PKTINFO). |
532 | * Is it the intended behavior? |
533 | */ |
534 | error = in6_selectsrc(sin6, in6p->in6p_outputopts, |
535 | in6p->in6p_moptions, &in6p->in6p_route, &in6p->in6p_laddr, |
536 | &ifp, &psref, &ia6); |
537 | if (error == 0) |
538 | in6a = &ia6; |
539 | if (ifp && scope_ambiguous && |
540 | (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { |
541 | if_put(ifp, &psref); |
542 | curlwp_bindx(bound); |
543 | return error; |
544 | } |
545 | |
546 | if (in6a == NULL) { |
547 | if_put(ifp, &psref); |
548 | curlwp_bindx(bound); |
549 | if (error == 0) |
550 | error = EADDRNOTAVAIL; |
551 | return error; |
552 | } |
553 | } |
554 | |
555 | if (ifp != NULL) { |
556 | in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); |
557 | if_put(ifp, &psref); |
558 | } else |
559 | in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim_rt(in6p); |
560 | curlwp_bindx(bound); |
561 | |
562 | if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr, |
563 | sin6->sin6_port, |
564 | IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr, |
565 | in6p->in6p_lport, 0, &vestige) |
566 | || vestige.valid) |
567 | return (EADDRINUSE); |
568 | if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || |
569 | (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && |
570 | in6p->in6p_laddr.s6_addr32[3] == 0)) |
571 | { |
572 | if (in6p->in6p_lport == 0) { |
573 | error = in6_pcbbind(in6p, NULL, l); |
574 | if (error != 0) |
575 | return error; |
576 | } |
577 | in6p->in6p_laddr = *in6a; |
578 | } |
579 | in6p->in6p_faddr = sin6->sin6_addr; |
580 | in6p->in6p_fport = sin6->sin6_port; |
581 | |
582 | /* Late bind, if needed */ |
583 | if (in6p->in6p_bindportonsend) { |
584 | struct sockaddr_in6 lsin = *((const struct sockaddr_in6 *) |
585 | in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); |
586 | lsin.sin6_addr = in6p->in6p_laddr; |
587 | lsin.sin6_port = 0; |
588 | |
589 | if ((error = in6_pcbbind_port(in6p, &lsin, l)) != 0) |
590 | return error; |
591 | } |
592 | |
593 | in6_pcbstate(in6p, IN6P_CONNECTED); |
594 | in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; |
595 | if (ip6_auto_flowlabel) |
596 | in6p->in6p_flowinfo |= |
597 | (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); |
598 | #if defined(IPSEC) |
599 | if (ipsec_enabled && in6p->in6p_socket->so_type == SOCK_STREAM) |
600 | ipsec_pcbconn(in6p->in6p_sp); |
601 | #endif |
602 | return (0); |
603 | } |
604 | |
605 | void |
606 | in6_pcbdisconnect(struct in6pcb *in6p) |
607 | { |
608 | memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr)); |
609 | in6p->in6p_fport = 0; |
610 | in6_pcbstate(in6p, IN6P_BOUND); |
611 | in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; |
612 | #if defined(IPSEC) |
613 | if (ipsec_enabled) |
614 | ipsec_pcbdisconn(in6p->in6p_sp); |
615 | #endif |
616 | if (in6p->in6p_socket->so_state & SS_NOFDREF) |
617 | in6_pcbdetach(in6p); |
618 | } |
619 | |
620 | void |
621 | in6_pcbdetach(struct in6pcb *in6p) |
622 | { |
623 | struct socket *so = in6p->in6p_socket; |
624 | int s; |
625 | |
626 | if (in6p->in6p_af != AF_INET6) |
627 | return; |
628 | |
629 | #if defined(IPSEC) |
630 | if (ipsec_enabled) |
631 | ipsec6_delete_pcbpolicy(in6p); |
632 | #endif |
633 | so->so_pcb = NULL; |
634 | |
635 | s = splnet(); |
636 | in6_pcbstate(in6p, IN6P_ATTACHED); |
637 | LIST_REMOVE(&in6p->in6p_head, inph_lhash); |
638 | TAILQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head, |
639 | inph_queue); |
640 | splx(s); |
641 | |
642 | if (in6p->in6p_options) { |
643 | m_freem(in6p->in6p_options); |
644 | } |
645 | if (in6p->in6p_outputopts != NULL) { |
646 | ip6_clearpktopts(in6p->in6p_outputopts, -1); |
647 | free(in6p->in6p_outputopts, M_IP6OPT); |
648 | } |
649 | rtcache_free(&in6p->in6p_route); |
650 | ip6_freemoptions(in6p->in6p_moptions); |
651 | ip_freemoptions(in6p->in6p_v4moptions); |
652 | sofree(so); /* drops the socket's lock */ |
653 | |
654 | pool_put(&in6pcb_pool, in6p); |
655 | mutex_enter(softnet_lock); /* reacquire it */ |
656 | } |
657 | |
658 | void |
659 | in6_setsockaddr(struct in6pcb *in6p, struct sockaddr_in6 *sin6) |
660 | { |
661 | |
662 | if (in6p->in6p_af != AF_INET6) |
663 | return; |
664 | |
665 | sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0); |
666 | (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ |
667 | } |
668 | |
669 | void |
670 | in6_setpeeraddr(struct in6pcb *in6p, struct sockaddr_in6 *sin6) |
671 | { |
672 | |
673 | if (in6p->in6p_af != AF_INET6) |
674 | return; |
675 | |
676 | sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0); |
677 | (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ |
678 | } |
679 | |
680 | /* |
681 | * Pass some notification to all connections of a protocol |
682 | * associated with address dst. The local address and/or port numbers |
683 | * may be specified to limit the search. The "usual action" will be |
684 | * taken, depending on the ctlinput cmd. The caller must filter any |
685 | * cmds that are uninteresting (e.g., no error in the map). |
686 | * Call the protocol specific routine (if any) to report |
687 | * any errors for each matching socket. |
688 | * |
689 | * Must be called at splsoftnet. |
690 | * |
691 | * Note: src (4th arg) carries the flowlabel value on the original IPv6 |
692 | * header, in sin6_flowinfo member. |
693 | */ |
694 | int |
695 | in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst, |
696 | u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd, |
697 | void *cmdarg, void (*notify)(struct in6pcb *, int)) |
698 | { |
699 | struct rtentry *rt; |
700 | struct inpcb_hdr *inph, *ninph; |
701 | struct sockaddr_in6 sa6_src; |
702 | const struct sockaddr_in6 *sa6_dst; |
703 | u_int16_t fport = fport_arg, lport = lport_arg; |
704 | int errno; |
705 | int nmatch = 0; |
706 | u_int32_t flowinfo; |
707 | |
708 | if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) |
709 | return 0; |
710 | |
711 | sa6_dst = (const struct sockaddr_in6 *)dst; |
712 | if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) |
713 | return 0; |
714 | |
715 | /* |
716 | * note that src can be NULL when we get notify by local fragmentation. |
717 | */ |
718 | sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; |
719 | flowinfo = sa6_src.sin6_flowinfo; |
720 | |
721 | /* |
722 | * Redirects go to all references to the destination, |
723 | * and use in6_rtchange to invalidate the route cache. |
724 | * Dead host indications: also use in6_rtchange to invalidate |
725 | * the cache, and deliver the error to all the sockets. |
726 | * Otherwise, if we have knowledge of the local port and address, |
727 | * deliver only to that socket. |
728 | */ |
729 | if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { |
730 | fport = 0; |
731 | lport = 0; |
732 | memset((void *)&sa6_src.sin6_addr, 0, sizeof(sa6_src.sin6_addr)); |
733 | |
734 | if (cmd != PRC_HOSTDEAD) |
735 | notify = in6_rtchange; |
736 | } |
737 | |
738 | errno = inet6ctlerrmap[cmd]; |
739 | TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { |
740 | struct in6pcb *in6p = (struct in6pcb *)inph; |
741 | if (in6p->in6p_af != AF_INET6) |
742 | continue; |
743 | |
744 | /* |
745 | * Under the following condition, notify of redirects |
746 | * to the pcb, without making address matches against inpcb. |
747 | * - redirect notification is arrived. |
748 | * - the inpcb is unconnected. |
749 | * - the inpcb is caching !RTF_HOST routing entry. |
750 | * - the ICMPv6 notification is from the gateway cached in the |
751 | * inpcb. i.e. ICMPv6 notification is from nexthop gateway |
752 | * the inpcb used very recently. |
753 | * |
754 | * This is to improve interaction between netbsd/openbsd |
755 | * redirect handling code, and inpcb route cache code. |
756 | * without the clause, !RTF_HOST routing entry (which carries |
757 | * gateway used by inpcb right before the ICMPv6 redirect) |
758 | * will be cached forever in unconnected inpcb. |
759 | * |
760 | * There still is a question regarding to what is TRT: |
761 | * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be |
762 | * generated on packet output. inpcb will always cache |
763 | * RTF_HOST routing entry so there's no need for the clause |
764 | * (ICMPv6 redirect will update RTF_HOST routing entry, |
765 | * and inpcb is caching it already). |
766 | * However, bsdi/freebsd are vulnerable to local DoS attacks |
767 | * due to the cloned routing entries. |
768 | * - Specwise, "destination cache" is mentioned in RFC2461. |
769 | * Jinmei says that it implies bsdi/freebsd behavior, itojun |
770 | * is not really convinced. |
771 | * - Having hiwat/lowat on # of cloned host route (redirect/ |
772 | * pmtud) may be a good idea. netbsd/openbsd has it. see |
773 | * icmp6_mtudisc_update(). |
774 | */ |
775 | if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && |
776 | IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && |
777 | (rt = rtcache_validate(&in6p->in6p_route)) != NULL && |
778 | !(rt->rt_flags & RTF_HOST)) { |
779 | const struct sockaddr_in6 *dst6; |
780 | |
781 | dst6 = (const struct sockaddr_in6 *) |
782 | rtcache_getdst(&in6p->in6p_route); |
783 | if (dst6 == NULL) |
784 | ; |
785 | else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, |
786 | &sa6_dst->sin6_addr)) |
787 | goto do_notify; |
788 | } |
789 | |
790 | /* |
791 | * If the error designates a new path MTU for a destination |
792 | * and the application (associated with this socket) wanted to |
793 | * know the value, notify. Note that we notify for all |
794 | * disconnected sockets if the corresponding application |
795 | * wanted. This is because some UDP applications keep sending |
796 | * sockets disconnected. |
797 | * XXX: should we avoid to notify the value to TCP sockets? |
798 | */ |
799 | if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 && |
800 | (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) || |
801 | IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) { |
802 | ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst, |
803 | (u_int32_t *)cmdarg); |
804 | } |
805 | |
806 | /* |
807 | * Detect if we should notify the error. If no source and |
808 | * destination ports are specified, but non-zero flowinfo and |
809 | * local address match, notify the error. This is the case |
810 | * when the error is delivered with an encrypted buffer |
811 | * by ESP. Otherwise, just compare addresses and ports |
812 | * as usual. |
813 | */ |
814 | if (lport == 0 && fport == 0 && flowinfo && |
815 | in6p->in6p_socket != NULL && |
816 | flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && |
817 | IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr)) |
818 | goto do_notify; |
819 | else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, |
820 | &sa6_dst->sin6_addr) || |
821 | in6p->in6p_socket == NULL || |
822 | (lport && in6p->in6p_lport != lport) || |
823 | (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && |
824 | !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, |
825 | &sa6_src.sin6_addr)) || |
826 | (fport && in6p->in6p_fport != fport)) |
827 | continue; |
828 | |
829 | do_notify: |
830 | if (notify) |
831 | (*notify)(in6p, errno); |
832 | nmatch++; |
833 | } |
834 | return nmatch; |
835 | } |
836 | |
837 | void |
838 | in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) |
839 | { |
840 | struct inpcb_hdr *inph, *ninph; |
841 | struct ip6_moptions *im6o; |
842 | struct in6_multi_mship *imm, *nimm; |
843 | |
844 | KASSERT(ifp != NULL); |
845 | |
846 | TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { |
847 | struct in6pcb *in6p = (struct in6pcb *)inph; |
848 | if (in6p->in6p_af != AF_INET6) |
849 | continue; |
850 | |
851 | im6o = in6p->in6p_moptions; |
852 | if (im6o) { |
853 | /* |
854 | * Unselect the outgoing interface if it is being |
855 | * detached. |
856 | */ |
857 | if (im6o->im6o_multicast_if_index == ifp->if_index) |
858 | im6o->im6o_multicast_if_index = 0; |
859 | |
860 | /* |
861 | * Drop multicast group membership if we joined |
862 | * through the interface being detached. |
863 | * XXX controversial - is it really legal for kernel |
864 | * to force this? |
865 | */ |
866 | for (imm = im6o->im6o_memberships.lh_first; |
867 | imm != NULL; imm = nimm) { |
868 | nimm = imm->i6mm_chain.le_next; |
869 | if (imm->i6mm_maddr->in6m_ifp == ifp) { |
870 | LIST_REMOVE(imm, i6mm_chain); |
871 | in6_leavegroup(imm); |
872 | } |
873 | } |
874 | } |
875 | in_purgeifmcast(in6p->in6p_v4moptions, ifp); |
876 | } |
877 | } |
878 | |
879 | void |
880 | in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) |
881 | { |
882 | struct rtentry *rt; |
883 | struct inpcb_hdr *inph, *ninph; |
884 | |
885 | TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { |
886 | struct in6pcb *in6p = (struct in6pcb *)inph; |
887 | if (in6p->in6p_af != AF_INET6) |
888 | continue; |
889 | if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL && |
890 | rt->rt_ifp == ifp) |
891 | in6_rtchange(in6p, 0); |
892 | } |
893 | } |
894 | |
895 | /* |
896 | * Check for alternatives when higher level complains |
897 | * about service problems. For now, invalidate cached |
898 | * routing information. If the route was created dynamically |
899 | * (by a redirect), time to try a default gateway again. |
900 | */ |
901 | void |
902 | in6_losing(struct in6pcb *in6p) |
903 | { |
904 | struct rtentry *rt; |
905 | struct rt_addrinfo info; |
906 | |
907 | if (in6p->in6p_af != AF_INET6) |
908 | return; |
909 | |
910 | if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL) |
911 | return; |
912 | |
913 | memset(&info, 0, sizeof(info)); |
914 | info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route); |
915 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
916 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
917 | rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); |
918 | if (rt->rt_flags & RTF_DYNAMIC) { |
919 | (void)rtrequest(RTM_DELETE, rt_getkey(rt), |
920 | rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL); |
921 | } |
922 | /* |
923 | * A new route can be allocated |
924 | * the next time output is attempted. |
925 | */ |
926 | rtcache_free(&in6p->in6p_route); |
927 | } |
928 | |
929 | /* |
930 | * After a routing change, flush old routing. A new route can be |
931 | * allocated the next time output is attempted. |
932 | */ |
933 | void |
934 | in6_rtchange(struct in6pcb *in6p, int errno) |
935 | { |
936 | if (in6p->in6p_af != AF_INET6) |
937 | return; |
938 | |
939 | rtcache_free(&in6p->in6p_route); |
940 | /* |
941 | * A new route can be allocated the next time |
942 | * output is attempted. |
943 | */ |
944 | } |
945 | |
946 | struct in6pcb * |
947 | in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6, |
948 | u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp) |
949 | { |
950 | struct inpcbhead *head; |
951 | struct inpcb_hdr *inph; |
952 | struct in6pcb *in6p, *match = NULL; |
953 | int matchwild = 3, wildcard; |
954 | u_int16_t lport = lport_arg; |
955 | |
956 | if (vp) |
957 | vp->valid = 0; |
958 | |
959 | head = IN6PCBHASH_PORT(table, lport); |
960 | LIST_FOREACH(inph, head, inph_lhash) { |
961 | in6p = (struct in6pcb *)inph; |
962 | if (in6p->in6p_af != AF_INET6) |
963 | continue; |
964 | |
965 | if (in6p->in6p_lport != lport) |
966 | continue; |
967 | wildcard = 0; |
968 | if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { |
969 | if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) |
970 | continue; |
971 | } |
972 | if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) |
973 | wildcard++; |
974 | if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { |
975 | if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) |
976 | continue; |
977 | if (!IN6_IS_ADDR_V4MAPPED(laddr6)) |
978 | continue; |
979 | |
980 | /* duplicate of IPv4 logic */ |
981 | wildcard = 0; |
982 | if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) && |
983 | in6p->in6p_faddr.s6_addr32[3]) |
984 | wildcard++; |
985 | if (!in6p->in6p_laddr.s6_addr32[3]) { |
986 | if (laddr6->s6_addr32[3]) |
987 | wildcard++; |
988 | } else { |
989 | if (!laddr6->s6_addr32[3]) |
990 | wildcard++; |
991 | else { |
992 | if (in6p->in6p_laddr.s6_addr32[3] != |
993 | laddr6->s6_addr32[3]) |
994 | continue; |
995 | } |
996 | } |
997 | } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { |
998 | if (IN6_IS_ADDR_V4MAPPED(laddr6)) { |
999 | if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) |
1000 | continue; |
1001 | } |
1002 | if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) |
1003 | wildcard++; |
1004 | } else { |
1005 | if (IN6_IS_ADDR_V4MAPPED(laddr6)) { |
1006 | if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) |
1007 | continue; |
1008 | } |
1009 | if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) |
1010 | wildcard++; |
1011 | else { |
1012 | if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, |
1013 | laddr6)) |
1014 | continue; |
1015 | } |
1016 | } |
1017 | if (wildcard && !lookup_wildcard) |
1018 | continue; |
1019 | if (wildcard < matchwild) { |
1020 | match = in6p; |
1021 | matchwild = wildcard; |
1022 | if (matchwild == 0) |
1023 | break; |
1024 | } |
1025 | } |
1026 | if (match && matchwild == 0) |
1027 | return match; |
1028 | |
1029 | if (vp && table->vestige && table->vestige->init_ports6) { |
1030 | struct vestigial_inpcb better; |
1031 | void *state; |
1032 | |
1033 | state = (*table->vestige->init_ports6)(laddr6, |
1034 | lport_arg, |
1035 | lookup_wildcard); |
1036 | while (table->vestige |
1037 | && (*table->vestige->next_port6)(state, vp)) { |
1038 | |
1039 | if (vp->lport != lport) |
1040 | continue; |
1041 | wildcard = 0; |
1042 | if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6)) |
1043 | wildcard++; |
1044 | if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) { |
1045 | if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) |
1046 | wildcard++; |
1047 | } else { |
1048 | if (IN6_IS_ADDR_V4MAPPED(laddr6)) { |
1049 | if (vp->v6only) |
1050 | continue; |
1051 | } |
1052 | if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) |
1053 | wildcard++; |
1054 | else { |
1055 | if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6)) |
1056 | continue; |
1057 | } |
1058 | } |
1059 | if (wildcard && !lookup_wildcard) |
1060 | continue; |
1061 | if (wildcard < matchwild) { |
1062 | better = *vp; |
1063 | match = (void*)&better; |
1064 | |
1065 | matchwild = wildcard; |
1066 | if (matchwild == 0) |
1067 | break; |
1068 | } |
1069 | } |
1070 | |
1071 | if (match) { |
1072 | if (match != (void*)&better) |
1073 | return match; |
1074 | else { |
1075 | *vp = better; |
1076 | return 0; |
1077 | } |
1078 | } |
1079 | } |
1080 | return (match); |
1081 | } |
1082 | |
1083 | /* |
1084 | * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to |
1085 | * IPv4 mapped address. |
1086 | */ |
1087 | struct rtentry * |
1088 | in6_pcbrtentry(struct in6pcb *in6p) |
1089 | { |
1090 | struct rtentry *rt; |
1091 | struct route *ro; |
1092 | union { |
1093 | const struct sockaddr *sa; |
1094 | const struct sockaddr_in6 *sa6; |
1095 | #ifdef INET |
1096 | const struct sockaddr_in *sa4; |
1097 | #endif |
1098 | } cdst; |
1099 | |
1100 | ro = &in6p->in6p_route; |
1101 | |
1102 | if (in6p->in6p_af != AF_INET6) |
1103 | return (NULL); |
1104 | |
1105 | cdst.sa = rtcache_getdst(ro); |
1106 | if (cdst.sa == NULL) |
1107 | ; |
1108 | #ifdef INET |
1109 | else if (cdst.sa->sa_family == AF_INET) { |
1110 | KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)); |
1111 | if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3]) |
1112 | rtcache_free(ro); |
1113 | } |
1114 | #endif |
1115 | else { |
1116 | if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr, |
1117 | &in6p->in6p_faddr)) |
1118 | rtcache_free(ro); |
1119 | } |
1120 | if ((rt = rtcache_validate(ro)) == NULL) |
1121 | rt = rtcache_update(ro, 1); |
1122 | #ifdef INET |
1123 | if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { |
1124 | union { |
1125 | struct sockaddr dst; |
1126 | struct sockaddr_in dst4; |
1127 | } u; |
1128 | struct in_addr addr; |
1129 | |
1130 | addr.s_addr = in6p->in6p_faddr.s6_addr32[3]; |
1131 | |
1132 | sockaddr_in_init(&u.dst4, &addr, 0); |
1133 | if (rtcache_setdst(ro, &u.dst) != 0) |
1134 | return NULL; |
1135 | |
1136 | rt = rtcache_init(ro); |
1137 | } else |
1138 | #endif |
1139 | if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { |
1140 | union { |
1141 | struct sockaddr dst; |
1142 | struct sockaddr_in6 dst6; |
1143 | } u; |
1144 | |
1145 | sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0); |
1146 | if (rtcache_setdst(ro, &u.dst) != 0) |
1147 | return NULL; |
1148 | |
1149 | rt = rtcache_init(ro); |
1150 | } |
1151 | return rt; |
1152 | } |
1153 | |
1154 | struct in6pcb * |
1155 | in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6, |
1156 | u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg, |
1157 | int faith, |
1158 | struct vestigial_inpcb *vp) |
1159 | { |
1160 | struct inpcbhead *head; |
1161 | struct inpcb_hdr *inph; |
1162 | struct in6pcb *in6p; |
1163 | u_int16_t fport = fport_arg, lport = lport_arg; |
1164 | |
1165 | if (vp) |
1166 | vp->valid = 0; |
1167 | |
1168 | head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport); |
1169 | LIST_FOREACH(inph, head, inph_hash) { |
1170 | in6p = (struct in6pcb *)inph; |
1171 | if (in6p->in6p_af != AF_INET6) |
1172 | continue; |
1173 | |
1174 | /* find exact match on both source and dest */ |
1175 | if (in6p->in6p_fport != fport) |
1176 | continue; |
1177 | if (in6p->in6p_lport != lport) |
1178 | continue; |
1179 | if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) |
1180 | continue; |
1181 | if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) |
1182 | continue; |
1183 | if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) |
1184 | continue; |
1185 | if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) |
1186 | continue; |
1187 | if ((IN6_IS_ADDR_V4MAPPED(laddr6) || |
1188 | IN6_IS_ADDR_V4MAPPED(faddr6)) && |
1189 | (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
1190 | continue; |
1191 | return in6p; |
1192 | } |
1193 | if (vp && table->vestige) { |
1194 | if ((*table->vestige->lookup6)(faddr6, fport_arg, |
1195 | laddr6, lport_arg, vp)) |
1196 | return NULL; |
1197 | } |
1198 | |
1199 | return NULL; |
1200 | } |
1201 | |
1202 | struct in6pcb * |
1203 | in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6, |
1204 | u_int lport_arg, int faith) |
1205 | { |
1206 | struct inpcbhead *head; |
1207 | struct inpcb_hdr *inph; |
1208 | struct in6pcb *in6p; |
1209 | u_int16_t lport = lport_arg; |
1210 | #ifdef INET |
1211 | struct in6_addr zero_mapped; |
1212 | #endif |
1213 | |
1214 | head = IN6PCBHASH_BIND(table, laddr6, lport); |
1215 | LIST_FOREACH(inph, head, inph_hash) { |
1216 | in6p = (struct in6pcb *)inph; |
1217 | if (in6p->in6p_af != AF_INET6) |
1218 | continue; |
1219 | |
1220 | if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) |
1221 | continue; |
1222 | if (in6p->in6p_fport != 0) |
1223 | continue; |
1224 | if (in6p->in6p_lport != lport) |
1225 | continue; |
1226 | if (IN6_IS_ADDR_V4MAPPED(laddr6) && |
1227 | (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) |
1228 | continue; |
1229 | if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) |
1230 | goto out; |
1231 | } |
1232 | #ifdef INET |
1233 | if (IN6_IS_ADDR_V4MAPPED(laddr6)) { |
1234 | memset(&zero_mapped, 0, sizeof(zero_mapped)); |
1235 | zero_mapped.s6_addr16[5] = 0xffff; |
1236 | head = IN6PCBHASH_BIND(table, &zero_mapped, lport); |
1237 | LIST_FOREACH(inph, head, inph_hash) { |
1238 | in6p = (struct in6pcb *)inph; |
1239 | if (in6p->in6p_af != AF_INET6) |
1240 | continue; |
1241 | |
1242 | if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) |
1243 | continue; |
1244 | if (in6p->in6p_fport != 0) |
1245 | continue; |
1246 | if (in6p->in6p_lport != lport) |
1247 | continue; |
1248 | if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) |
1249 | continue; |
1250 | if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped)) |
1251 | goto out; |
1252 | } |
1253 | } |
1254 | #endif |
1255 | head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport); |
1256 | LIST_FOREACH(inph, head, inph_hash) { |
1257 | in6p = (struct in6pcb *)inph; |
1258 | if (in6p->in6p_af != AF_INET6) |
1259 | continue; |
1260 | |
1261 | if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) |
1262 | continue; |
1263 | if (in6p->in6p_fport != 0) |
1264 | continue; |
1265 | if (in6p->in6p_lport != lport) |
1266 | continue; |
1267 | if (IN6_IS_ADDR_V4MAPPED(laddr6) && |
1268 | (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) |
1269 | continue; |
1270 | if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr)) |
1271 | goto out; |
1272 | } |
1273 | return (NULL); |
1274 | |
1275 | out: |
1276 | inph = &in6p->in6p_head; |
1277 | if (inph != LIST_FIRST(head)) { |
1278 | LIST_REMOVE(inph, inph_hash); |
1279 | LIST_INSERT_HEAD(head, inph, inph_hash); |
1280 | } |
1281 | return in6p; |
1282 | } |
1283 | |
1284 | void |
1285 | in6_pcbstate(struct in6pcb *in6p, int state) |
1286 | { |
1287 | |
1288 | if (in6p->in6p_af != AF_INET6) |
1289 | return; |
1290 | |
1291 | if (in6p->in6p_state > IN6P_ATTACHED) |
1292 | LIST_REMOVE(&in6p->in6p_head, inph_hash); |
1293 | |
1294 | switch (state) { |
1295 | case IN6P_BOUND: |
1296 | LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table, |
1297 | &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, |
1298 | inph_hash); |
1299 | break; |
1300 | case IN6P_CONNECTED: |
1301 | LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table, |
1302 | &in6p->in6p_faddr, in6p->in6p_fport, |
1303 | &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, |
1304 | inph_hash); |
1305 | break; |
1306 | } |
1307 | |
1308 | in6p->in6p_state = state; |
1309 | } |
1310 | |