proc->thread stage 4: rework the VFS and DEVICE subsystems to take thread
[dragonfly.git] / sys / netinet6 / in6_pcb.c
CommitLineData
984263bc 1/* $FreeBSD: src/sys/netinet6/in6_pcb.c,v 1.10.2.9 2003/01/24 05:11:35 sam Exp $ */
dadab5e9 2/* $DragonFly: src/sys/netinet6/in6_pcb.c,v 1.4 2003/06/25 03:56:04 dillon Exp $ */
984263bc
MD
3/* $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ */
4
5/*
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
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 */
34
35/*
36 * Copyright (c) 1982, 1986, 1991, 1993
37 * The Regents of the University of California. All rights reserved.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
47 * 3. All advertising materials mentioning features or use of this software
48 * must display the following acknowledgement:
49 * This product includes software developed by the University of
50 * California, Berkeley and its contributors.
51 * 4. Neither the name of the University nor the names of its contributors
52 * may be used to endorse or promote products derived from this software
53 * without specific prior written permission.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
66 *
67 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
68 */
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/proc.h>
86#include <sys/jail.h>
87
88#include <vm/vm_zone.h>
89
90#include <net/if.h>
91#include <net/if_types.h>
92#include <net/route.h>
93
94#include <netinet/in.h>
95#include <netinet/in_var.h>
96#include <netinet/in_systm.h>
97#include <netinet/ip6.h>
98#include <netinet/ip_var.h>
99#include <netinet6/ip6_var.h>
100#include <netinet6/nd6.h>
101#include <netinet/in_pcb.h>
102#include <netinet6/in6_pcb.h>
103
104#ifdef IPSEC
105#include <netinet6/ipsec.h>
106#ifdef INET6
107#include <netinet6/ipsec6.h>
108#endif
109#include <netinet6/ah.h>
110#ifdef INET6
111#include <netinet6/ah6.h>
112#endif
113#include <netkey/key.h>
114#endif /* IPSEC */
115
116#ifdef FAST_IPSEC
117#include <netipsec/ipsec.h>
118#include <netipsec/ipsec6.h>
119#include <netipsec/key.h>
120#define IPSEC
121#endif /* FAST_IPSEC */
122
123struct in6_addr zeroin6_addr;
124
125int
dadab5e9 126in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
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127{
128 struct socket *so = inp->inp_socket;
129 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
130 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
131 u_short lport = 0;
132 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
133
134 if (!in6_ifaddr) /* XXX broken! */
135 return (EADDRNOTAVAIL);
136 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
137 return(EINVAL);
138 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
139 wild = 1;
140 if (nam) {
141 sin6 = (struct sockaddr_in6 *)nam;
142 if (nam->sa_len != sizeof(*sin6))
143 return(EINVAL);
144 /*
145 * family check.
146 */
147 if (nam->sa_family != AF_INET6)
148 return(EAFNOSUPPORT);
149
150 /* KAME hack: embed scopeid */
151 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0)
152 return EINVAL;
153 /* this must be cleared for ifa_ifwithaddr() */
154 sin6->sin6_scope_id = 0;
155
156 lport = sin6->sin6_port;
157 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
158 /*
159 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
160 * allow compepte duplication of binding if
161 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
162 * and a multicast address is bound on both
163 * new and duplicated sockets.
164 */
165 if (so->so_options & SO_REUSEADDR)
166 reuseport = SO_REUSEADDR|SO_REUSEPORT;
167 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
168 struct ifaddr *ia = NULL;
169
170 sin6->sin6_port = 0; /* yech... */
171 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
172 return(EADDRNOTAVAIL);
173
174 /*
175 * XXX: bind to an anycast address might accidentally
176 * cause sending a packet with anycast source address.
177 * We should allow to bind to a deprecated address, since
178 * the application dare to use it.
179 */
180 if (ia &&
181 ((struct in6_ifaddr *)ia)->ia6_flags &
182 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
183 return(EADDRNOTAVAIL);
184 }
185 }
186 if (lport) {
187 struct inpcb *t;
dadab5e9 188 struct proc *p = td->td_proc; /* may be NULL */
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189
190 /* GROSS */
191 if (ntohs(lport) < IPV6PORT_RESERVED && p &&
dadab5e9 192 suser_cred(p->p_ucred, PRISON_ROOT))
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MD
193 return(EACCES);
194 if (so->so_cred->cr_uid != 0 &&
195 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
196 t = in6_pcblookup_local(pcbinfo,
197 &sin6->sin6_addr, lport,
198 INPLOOKUP_WILDCARD);
199 if (t &&
200 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
201 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
202 (t->inp_socket->so_options &
203 SO_REUSEPORT) == 0) &&
204 (so->so_cred->cr_uid !=
205 t->inp_socket->so_cred->cr_uid))
206 return (EADDRINUSE);
207 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
208 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
209 struct sockaddr_in sin;
210
211 in6_sin6_2_sin(&sin, sin6);
212 t = in_pcblookup_local(pcbinfo,
213 sin.sin_addr, lport,
214 INPLOOKUP_WILDCARD);
215 if (t &&
216 (so->so_cred->cr_uid !=
217 t->inp_socket->so_cred->cr_uid) &&
218 (ntohl(t->inp_laddr.s_addr) !=
219 INADDR_ANY ||
220 INP_SOCKAF(so) ==
221 INP_SOCKAF(t->inp_socket)))
222 return (EADDRINUSE);
223 }
224 }
225 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
226 lport, wild);
227 if (t && (reuseport & t->inp_socket->so_options) == 0)
228 return(EADDRINUSE);
229 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
230 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
231 struct sockaddr_in sin;
232
233 in6_sin6_2_sin(&sin, sin6);
234 t = in_pcblookup_local(pcbinfo, sin.sin_addr,
235 lport, wild);
236 if (t &&
237 (reuseport & t->inp_socket->so_options)
238 == 0 &&
239 (ntohl(t->inp_laddr.s_addr)
240 != INADDR_ANY ||
241 INP_SOCKAF(so) ==
242 INP_SOCKAF(t->inp_socket)))
243 return (EADDRINUSE);
244 }
245 }
246 inp->in6p_laddr = sin6->sin6_addr;
247 }
248 if (lport == 0) {
249 int e;
dadab5e9 250 if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, td)) != 0)
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251 return(e);
252 }
253 else {
254 inp->inp_lport = lport;
255 if (in_pcbinshash(inp) != 0) {
256 inp->in6p_laddr = in6addr_any;
257 inp->inp_lport = 0;
258 return (EAGAIN);
259 }
260 }
261 return(0);
262}
263
264/*
265 * Transform old in6_pcbconnect() into an inner subroutine for new
266 * in6_pcbconnect(): Do some validity-checking on the remote
267 * address (in mbuf 'nam') and then determine local host address
268 * (i.e., which interface) to use to access that remote host.
269 *
270 * This preserves definition of in6_pcbconnect(), while supporting a
271 * slightly different version for T/TCP. (This is more than
272 * a bit of a kludge, but cleaning up the internal interfaces would
273 * have forced minor changes in every protocol).
274 */
275
276int
dadab5e9
MD
277in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
278 struct in6_addr **plocal_addr6)
984263bc 279{
dadab5e9 280 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
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MD
281 struct ifnet *ifp = NULL;
282 int error = 0;
283
284 if (nam->sa_len != sizeof (*sin6))
285 return (EINVAL);
286 if (sin6->sin6_family != AF_INET6)
287 return (EAFNOSUPPORT);
288 if (sin6->sin6_port == 0)
289 return (EADDRNOTAVAIL);
290
291 /* KAME hack: embed scopeid */
292 if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0)
293 return EINVAL;
294
295 if (in6_ifaddr) {
296 /*
297 * If the destination address is UNSPECIFIED addr,
298 * use the loopback addr, e.g ::1.
299 */
300 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
301 sin6->sin6_addr = in6addr_loopback;
302 }
303 {
304 /*
305 * XXX: in6_selectsrc might replace the bound local address
306 * with the address specified by setsockopt(IPV6_PKTINFO).
307 * Is it the intended behavior?
308 */
309 *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
310 inp->in6p_moptions,
311 &inp->in6p_route,
312 &inp->in6p_laddr, &error);
313 if (*plocal_addr6 == 0) {
314 if (error == 0)
315 error = EADDRNOTAVAIL;
316 return(error);
317 }
318 /*
319 * Don't do pcblookup call here; return interface in
320 * plocal_addr6
321 * and exit to caller, that will do the lookup.
322 */
323 }
324
325 if (inp->in6p_route.ro_rt)
326 ifp = inp->in6p_route.ro_rt->rt_ifp;
327
328 return(0);
329}
330
331/*
332 * Outer subroutine:
333 * Connect from a socket to a specified address.
334 * Both address and port must be specified in argument sin.
335 * If don't have a local address for this socket yet,
336 * then pick one.
337 */
338int
dadab5e9 339in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
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340{
341 struct in6_addr *addr6;
342 register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
343 int error;
344
345 /*
346 * Call inner routine, to assign local interface address.
347 * in6_pcbladdr() may automatically fill in sin6_scope_id.
348 */
349 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
350 return(error);
351
352 if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
353 sin6->sin6_port,
354 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
355 ? addr6 : &inp->in6p_laddr,
356 inp->inp_lport, 0, NULL) != NULL) {
357 return (EADDRINUSE);
358 }
359 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
360 if (inp->inp_lport == 0) {
dadab5e9 361 error = in6_pcbbind(inp, (struct sockaddr *)0, td);
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MD
362 if (error)
363 return (error);
364 }
365 inp->in6p_laddr = *addr6;
366 }
367 inp->in6p_faddr = sin6->sin6_addr;
368 inp->inp_fport = sin6->sin6_port;
369 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
370 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
371 if (inp->in6p_flags & IN6P_AUTOFLOWLABEL)
372 inp->in6p_flowinfo |=
373 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
374
375 in_pcbrehash(inp);
376 return (0);
377}
378
379#if 0
380/*
381 * Return an IPv6 address, which is the most appropriate for given
382 * destination and user specified options.
383 * If necessary, this function lookups the routing table and return
384 * an entry to the caller for later use.
385 */
386struct in6_addr *
387in6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp)
388 struct sockaddr_in6 *dstsock;
389 struct ip6_pktopts *opts;
390 struct ip6_moptions *mopts;
391 struct route_in6 *ro;
392 struct in6_addr *laddr;
393 int *errorp;
394{
395 struct in6_addr *dst;
396 struct in6_ifaddr *ia6 = 0;
397 struct in6_pktinfo *pi = NULL;
398
399 dst = &dstsock->sin6_addr;
400 *errorp = 0;
401
402 /*
403 * If the source address is explicitly specified by the caller,
404 * use it.
405 */
406 if (opts && (pi = opts->ip6po_pktinfo) &&
407 !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr))
408 return(&pi->ipi6_addr);
409
410 /*
411 * If the source address is not specified but the socket(if any)
412 * is already bound, use the bound address.
413 */
414 if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr))
415 return(laddr);
416
417 /*
418 * If the caller doesn't specify the source address but
419 * the outgoing interface, use an address associated with
420 * the interface.
421 */
422 if (pi && pi->ipi6_ifindex) {
423 /* XXX boundary check is assumed to be already done. */
424 ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
425 dst);
426 if (ia6 == 0) {
427 *errorp = EADDRNOTAVAIL;
428 return(0);
429 }
430 return(&satosin6(&ia6->ia_addr)->sin6_addr);
431 }
432
433 /*
434 * If the destination address is a link-local unicast address or
435 * a multicast address, and if the outgoing interface is specified
436 * by the sin6_scope_id filed, use an address associated with the
437 * interface.
438 * XXX: We're now trying to define more specific semantics of
439 * sin6_scope_id field, so this part will be rewritten in
440 * the near future.
441 */
442 if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
443 dstsock->sin6_scope_id) {
444 /*
445 * I'm not sure if boundary check for scope_id is done
446 * somewhere...
447 */
448 if (dstsock->sin6_scope_id < 0 ||
449 if_index < dstsock->sin6_scope_id) {
450 *errorp = ENXIO; /* XXX: better error? */
451 return(0);
452 }
453 ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
454 dst);
455 if (ia6 == 0) {
456 *errorp = EADDRNOTAVAIL;
457 return(0);
458 }
459 return(&satosin6(&ia6->ia_addr)->sin6_addr);
460 }
461
462 /*
463 * If the destination address is a multicast address and
464 * the outgoing interface for the address is specified
465 * by the caller, use an address associated with the interface.
466 * There is a sanity check here; if the destination has node-local
467 * scope, the outgoing interfacde should be a loopback address.
468 * Even if the outgoing interface is not specified, we also
469 * choose a loopback interface as the outgoing interface.
470 */
471 if (IN6_IS_ADDR_MULTICAST(dst)) {
472 struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
473
474 if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
475 ifp = &loif[0];
476 }
477
478 if (ifp) {
479 ia6 = in6_ifawithscope(ifp, dst);
480 if (ia6 == 0) {
481 *errorp = EADDRNOTAVAIL;
482 return(0);
483 }
484 return(&ia6->ia_addr.sin6_addr);
485 }
486 }
487
488 /*
489 * If the next hop address for the packet is specified
490 * by caller, use an address associated with the route
491 * to the next hop.
492 */
493 {
494 struct sockaddr_in6 *sin6_next;
495 struct rtentry *rt;
496
497 if (opts && opts->ip6po_nexthop) {
498 sin6_next = satosin6(opts->ip6po_nexthop);
499 rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
500 if (rt) {
501 ia6 = in6_ifawithscope(rt->rt_ifp, dst);
502 if (ia6 == 0)
503 ia6 = ifatoia6(rt->rt_ifa);
504 }
505 if (ia6 == 0) {
506 *errorp = EADDRNOTAVAIL;
507 return(0);
508 }
509 return(&satosin6(&ia6->ia_addr)->sin6_addr);
510 }
511 }
512
513 /*
514 * If route is known or can be allocated now,
515 * our src addr is taken from the i/f, else punt.
516 */
517 if (ro) {
518 if (ro->ro_rt &&
519 !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
520 RTFREE(ro->ro_rt);
521 ro->ro_rt = (struct rtentry *)0;
522 }
523 if (ro->ro_rt == (struct rtentry *)0 ||
524 ro->ro_rt->rt_ifp == (struct ifnet *)0) {
525 struct sockaddr_in6 *dst6;
526
527 /* No route yet, so try to acquire one */
528 bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
529 dst6 = (struct sockaddr_in6 *)&ro->ro_dst;
530 dst6->sin6_family = AF_INET6;
531 dst6->sin6_len = sizeof(struct sockaddr_in6);
532 dst6->sin6_addr = *dst;
533 if (IN6_IS_ADDR_MULTICAST(dst)) {
534 ro->ro_rt = rtalloc1(&((struct route *)ro)
535 ->ro_dst, 0, 0UL);
536 } else {
537 rtalloc((struct route *)ro);
538 }
539 }
540
541 /*
542 * in_pcbconnect() checks out IFF_LOOPBACK to skip using
543 * the address. But we don't know why it does so.
544 * It is necessary to ensure the scope even for lo0
545 * so doesn't check out IFF_LOOPBACK.
546 */
547
548 if (ro->ro_rt) {
549 ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
550 if (ia6 == 0) /* xxx scope error ?*/
551 ia6 = ifatoia6(ro->ro_rt->rt_ifa);
552 }
553 if (ia6 == 0) {
554 *errorp = EHOSTUNREACH; /* no route */
555 return(0);
556 }
557 return(&satosin6(&ia6->ia_addr)->sin6_addr);
558 }
559
560 *errorp = EADDRNOTAVAIL;
561 return(0);
562}
563
564/*
565 * Default hop limit selection. The precedence is as follows:
566 * 1. Hoplimit valued specified via ioctl.
567 * 2. (If the outgoing interface is detected) the current
568 * hop limit of the interface specified by router advertisement.
569 * 3. The system default hoplimit.
570*/
571int
572in6_selecthlim(in6p, ifp)
573 struct in6pcb *in6p;
574 struct ifnet *ifp;
575{
576 if (in6p && in6p->in6p_hops >= 0)
577 return(in6p->in6p_hops);
578 else if (ifp)
579 return(nd_ifinfo[ifp->if_index].chlim);
580 else
581 return(ip6_defhlim);
582}
583#endif
584
585void
586in6_pcbdisconnect(inp)
587 struct inpcb *inp;
588{
589 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
590 inp->inp_fport = 0;
591 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
592 inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
593 in_pcbrehash(inp);
594 if (inp->inp_socket->so_state & SS_NOFDREF)
595 in6_pcbdetach(inp);
596}
597
598void
599in6_pcbdetach(inp)
600 struct inpcb *inp;
601{
602 struct socket *so = inp->inp_socket;
603 struct inpcbinfo *ipi = inp->inp_pcbinfo;
604
605#ifdef IPSEC
606 if (inp->in6p_sp != NULL)
607 ipsec6_delete_pcbpolicy(inp);
608#endif /* IPSEC */
609 inp->inp_gencnt = ++ipi->ipi_gencnt;
610 in_pcbremlists(inp);
611 sotoinpcb(so) = 0;
612 sofree(so);
613
614 if (inp->in6p_options)
615 m_freem(inp->in6p_options);
616 ip6_freepcbopts(inp->in6p_outputopts);
617 ip6_freemoptions(inp->in6p_moptions);
618 if (inp->in6p_route.ro_rt)
619 rtfree(inp->in6p_route.ro_rt);
620 /* Check and free IPv4 related resources in case of mapped addr */
621 if (inp->inp_options)
622 (void)m_free(inp->inp_options);
623 ip_freemoptions(inp->inp_moptions);
624
625 inp->inp_vflag = 0;
626 zfreei(ipi->ipi_zone, inp);
627}
628
629/*
630 * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
631 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
632 * in struct pr_usrreqs, so that protocols can just reference then directly
633 * without the need for a wrapper function. The socket must have a valid
634 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
635 * except through a kernel programming error, so it is acceptable to panic
636 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
637 * because there actually /is/ a programming error somewhere... XXX)
638 */
639int
640in6_setsockaddr(so, nam)
641 struct socket *so;
642 struct sockaddr **nam;
643{
644 int s;
645 register struct inpcb *inp;
646 register struct sockaddr_in6 *sin6;
647
648 /*
649 * Do the malloc first in case it blocks.
650 */
651 MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
652 bzero(sin6, sizeof *sin6);
653 sin6->sin6_family = AF_INET6;
654 sin6->sin6_len = sizeof(*sin6);
655
656 s = splnet();
657 inp = sotoinpcb(so);
658 if (!inp) {
659 splx(s);
660 free(sin6, M_SONAME);
661 return EINVAL;
662 }
663 sin6->sin6_port = inp->inp_lport;
664 sin6->sin6_addr = inp->in6p_laddr;
665 splx(s);
666 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
667 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
668 else
669 sin6->sin6_scope_id = 0; /*XXX*/
670 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
671 sin6->sin6_addr.s6_addr16[1] = 0;
672
673 *nam = (struct sockaddr *)sin6;
674 return 0;
675}
676
677int
678in6_setpeeraddr(so, nam)
679 struct socket *so;
680 struct sockaddr **nam;
681{
682 int s;
683 struct inpcb *inp;
684 register struct sockaddr_in6 *sin6;
685
686 /*
687 * Do the malloc first in case it blocks.
688 */
689 MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
690 bzero((caddr_t)sin6, sizeof (*sin6));
691 sin6->sin6_family = AF_INET6;
692 sin6->sin6_len = sizeof(struct sockaddr_in6);
693
694 s = splnet();
695 inp = sotoinpcb(so);
696 if (!inp) {
697 splx(s);
698 free(sin6, M_SONAME);
699 return EINVAL;
700 }
701 sin6->sin6_port = inp->inp_fport;
702 sin6->sin6_addr = inp->in6p_faddr;
703 splx(s);
704 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
705 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
706 else
707 sin6->sin6_scope_id = 0; /*XXX*/
708 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
709 sin6->sin6_addr.s6_addr16[1] = 0;
710
711 *nam = (struct sockaddr *)sin6;
712 return 0;
713}
714
715int
716in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
717{
718 struct inpcb *inp = sotoinpcb(so);
719 int error;
720
721 if (inp == NULL)
722 return EINVAL;
723 if (inp->inp_vflag & INP_IPV4) {
724 error = in_setsockaddr(so, nam);
725 if (error == 0)
726 in6_sin_2_v4mapsin6_in_sock(nam);
727 } else
728 /* scope issues will be handled in in6_setsockaddr(). */
729 error = in6_setsockaddr(so, nam);
730
731 return error;
732}
733
734int
735in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
736{
737 struct inpcb *inp = sotoinpcb(so);
738 int error;
739
740 if (inp == NULL)
741 return EINVAL;
742 if (inp->inp_vflag & INP_IPV4) {
743 error = in_setpeeraddr(so, nam);
744 if (error == 0)
745 in6_sin_2_v4mapsin6_in_sock(nam);
746 } else
747 /* scope issues will be handled in in6_setpeeraddr(). */
748 error = in6_setpeeraddr(so, nam);
749
750 return error;
751}
752
753/*
754 * Pass some notification to all connections of a protocol
755 * associated with address dst. The local address and/or port numbers
756 * may be specified to limit the search. The "usual action" will be
757 * taken, depending on the ctlinput cmd. The caller must filter any
758 * cmds that are uninteresting (e.g., no error in the map).
759 * Call the protocol specific routine (if any) to report
760 * any errors for each matching socket.
761 *
762 * Must be called at splnet.
763 */
764void
765in6_pcbnotify(head, dst, fport_arg, src, lport_arg, cmd, notify)
766 struct inpcbhead *head;
767 struct sockaddr *dst, *src;
768 u_int fport_arg, lport_arg;
769 int cmd;
770 void (*notify) __P((struct inpcb *, int));
771{
772 struct inpcb *inp, *ninp;
773 struct sockaddr_in6 sa6_src, *sa6_dst;
774 u_short fport = fport_arg, lport = lport_arg;
775 u_int32_t flowinfo;
776 int errno, s;
777
778 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6)
779 return;
780
781 sa6_dst = (struct sockaddr_in6 *)dst;
782 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
783 return;
784
785 /*
786 * note that src can be NULL when we get notify by local fragmentation.
787 */
788 sa6_src = (src == NULL) ? sa6_any : *(struct sockaddr_in6 *)src;
789 flowinfo = sa6_src.sin6_flowinfo;
790
791 /*
792 * Redirects go to all references to the destination,
793 * and use in6_rtchange to invalidate the route cache.
794 * Dead host indications: also use in6_rtchange to invalidate
795 * the cache, and deliver the error to all the sockets.
796 * Otherwise, if we have knowledge of the local port and address,
797 * deliver only to that socket.
798 */
799 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
800 fport = 0;
801 lport = 0;
802 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
803
804 if (cmd != PRC_HOSTDEAD)
805 notify = in6_rtchange;
806 }
807 errno = inet6ctlerrmap[cmd];
808 s = splnet();
809 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
810 ninp = LIST_NEXT(inp, inp_list);
811
812 if ((inp->inp_vflag & INP_IPV6) == 0)
813 continue;
814
815 /*
816 * Detect if we should notify the error. If no source and
817 * destination ports are specifed, but non-zero flowinfo and
818 * local address match, notify the error. This is the case
819 * when the error is delivered with an encrypted buffer
820 * by ESP. Otherwise, just compare addresses and ports
821 * as usual.
822 */
823 if (lport == 0 && fport == 0 && flowinfo &&
824 inp->inp_socket != NULL &&
825 flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
826 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
827 goto do_notify;
828 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
829 &sa6_dst->sin6_addr) ||
830 inp->inp_socket == 0 ||
831 (lport && inp->inp_lport != lport) ||
832 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
833 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
834 &sa6_src.sin6_addr)) ||
835 (fport && inp->inp_fport != fport))
836 continue;
837
838 do_notify:
839 if (notify)
840 (*notify)(inp, errno);
841 }
842 splx(s);
843}
844
845/*
846 * Lookup a PCB based on the local address and port.
847 */
848struct inpcb *
849in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
850 struct inpcbinfo *pcbinfo;
851 struct in6_addr *laddr;
852 u_int lport_arg;
853 int wild_okay;
854{
855 register struct inpcb *inp;
856 int matchwild = 3, wildcard;
857 u_short lport = lport_arg;
858
859 if (!wild_okay) {
860 struct inpcbhead *head;
861 /*
862 * Look for an unconnected (wildcard foreign addr) PCB that
863 * matches the local address and port we're looking for.
864 */
865 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
866 pcbinfo->hashmask)];
867 LIST_FOREACH(inp, head, inp_hash) {
868 if ((inp->inp_vflag & INP_IPV6) == 0)
869 continue;
870 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
871 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
872 inp->inp_lport == lport) {
873 /*
874 * Found.
875 */
876 return (inp);
877 }
878 }
879 /*
880 * Not found.
881 */
882 return (NULL);
883 } else {
884 struct inpcbporthead *porthash;
885 struct inpcbport *phd;
886 struct inpcb *match = NULL;
887 /*
888 * Best fit PCB lookup.
889 *
890 * First see if this local port is in use by looking on the
891 * port hash list.
892 */
893 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
894 pcbinfo->porthashmask)];
895 LIST_FOREACH(phd, porthash, phd_hash) {
896 if (phd->phd_port == lport)
897 break;
898 }
899 if (phd != NULL) {
900 /*
901 * Port is in use by one or more PCBs. Look for best
902 * fit.
903 */
904 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
905 wildcard = 0;
906 if ((inp->inp_vflag & INP_IPV6) == 0)
907 continue;
908 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
909 wildcard++;
910 if (!IN6_IS_ADDR_UNSPECIFIED(
911 &inp->in6p_laddr)) {
912 if (IN6_IS_ADDR_UNSPECIFIED(laddr))
913 wildcard++;
914 else if (!IN6_ARE_ADDR_EQUAL(
915 &inp->in6p_laddr, laddr))
916 continue;
917 } else {
918 if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
919 wildcard++;
920 }
921 if (wildcard < matchwild) {
922 match = inp;
923 matchwild = wildcard;
924 if (matchwild == 0) {
925 break;
926 }
927 }
928 }
929 }
930 return (match);
931 }
932}
933
934void
935in6_pcbpurgeif0(head, ifp)
936 struct in6pcb *head;
937 struct ifnet *ifp;
938{
939 struct in6pcb *in6p;
940 struct ip6_moptions *im6o;
941 struct in6_multi_mship *imm, *nimm;
942
943 for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) {
944 im6o = in6p->in6p_moptions;
945 if ((in6p->inp_vflag & INP_IPV6) &&
946 im6o) {
947 /*
948 * Unselect the outgoing interface if it is being
949 * detached.
950 */
951 if (im6o->im6o_multicast_ifp == ifp)
952 im6o->im6o_multicast_ifp = NULL;
953
954 /*
955 * Drop multicast group membership if we joined
956 * through the interface being detached.
957 * XXX controversial - is it really legal for kernel
958 * to force this?
959 */
960 for (imm = im6o->im6o_memberships.lh_first;
961 imm != NULL; imm = nimm) {
962 nimm = imm->i6mm_chain.le_next;
963 if (imm->i6mm_maddr->in6m_ifp == ifp) {
964 LIST_REMOVE(imm, i6mm_chain);
965 in6_delmulti(imm->i6mm_maddr);
966 free(imm, M_IPMADDR);
967 }
968 }
969 }
970 }
971}
972
973/*
974 * Check for alternatives when higher level complains
975 * about service problems. For now, invalidate cached
976 * routing information. If the route was created dynamically
977 * (by a redirect), time to try a default gateway again.
978 */
979void
980in6_losing(in6p)
981 struct inpcb *in6p;
982{
983 struct rtentry *rt;
984 struct rt_addrinfo info;
985
986 if ((rt = in6p->in6p_route.ro_rt) != NULL) {
987 bzero((caddr_t)&info, sizeof(info));
988 info.rti_flags = rt->rt_flags;
989 info.rti_info[RTAX_DST] = rt_key(rt);
990 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
991 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
992 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
993 if (rt->rt_flags & RTF_DYNAMIC)
994 (void)rtrequest1(RTM_DELETE, &info, NULL);
995 in6p->in6p_route.ro_rt = NULL;
996 rtfree(rt);
997 /*
998 * A new route can be allocated
999 * the next time output is attempted.
1000 */
1001 }
1002}
1003
1004/*
1005 * After a routing change, flush old routing
1006 * and allocate a (hopefully) better one.
1007 */
1008void
1009in6_rtchange(inp, errno)
1010 struct inpcb *inp;
1011 int errno;
1012{
1013 if (inp->in6p_route.ro_rt) {
1014 rtfree(inp->in6p_route.ro_rt);
1015 inp->in6p_route.ro_rt = 0;
1016 /*
1017 * A new route can be allocated the next time
1018 * output is attempted.
1019 */
1020 }
1021}
1022
1023/*
1024 * Lookup PCB in hash list.
1025 */
1026struct inpcb *
1027in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
1028 struct inpcbinfo *pcbinfo;
1029 struct in6_addr *faddr, *laddr;
1030 u_int fport_arg, lport_arg;
1031 int wildcard;
1032 struct ifnet *ifp;
1033{
1034 struct inpcbhead *head;
1035 register struct inpcb *inp;
1036 u_short fport = fport_arg, lport = lport_arg;
1037 int faith;
1038
1039 if (faithprefix_p != NULL)
1040 faith = (*faithprefix_p)(laddr);
1041 else
1042 faith = 0;
1043
1044 /*
1045 * First look for an exact match.
1046 */
1047 head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */,
1048 lport, fport,
1049 pcbinfo->hashmask)];
1050 LIST_FOREACH(inp, head, inp_hash) {
1051 if ((inp->inp_vflag & INP_IPV6) == 0)
1052 continue;
1053 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
1054 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
1055 inp->inp_fport == fport &&
1056 inp->inp_lport == lport) {
1057 /*
1058 * Found.
1059 */
1060 return (inp);
1061 }
1062 }
1063 if (wildcard) {
1064 struct inpcb *local_wild = NULL;
1065
1066 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
1067 pcbinfo->hashmask)];
1068 LIST_FOREACH(inp, head, inp_hash) {
1069 if ((inp->inp_vflag & INP_IPV6) == 0)
1070 continue;
1071 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
1072 inp->inp_lport == lport) {
1073 if (faith && (inp->inp_flags & INP_FAITH) == 0)
1074 continue;
1075 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
1076 laddr))
1077 return (inp);
1078 else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
1079 local_wild = inp;
1080 }
1081 }
1082 return (local_wild);
1083 }
1084
1085 /*
1086 * Not found.
1087 */
1088 return (NULL);
1089}
1090
1091void
1092init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
1093{
1094 struct ip6_hdr *ip;
1095
1096 ip = mtod(m, struct ip6_hdr *);
1097 bzero(sin6, sizeof(*sin6));
1098 sin6->sin6_len = sizeof(*sin6);
1099 sin6->sin6_family = AF_INET6;
1100 sin6->sin6_addr = ip->ip6_src;
1101 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1102 sin6->sin6_addr.s6_addr16[1] = 0;
1103 sin6->sin6_scope_id =
1104 (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
1105 ? m->m_pkthdr.rcvif->if_index : 0;
1106
1107 return;
1108}