HAMMER 60I/Many: Mirroring
[dragonfly.git] / sys / netinet / in_pcb.c
bloba69b9c165ecec38e65e34050e44962ca79e2fb3b
1 /*
2 * Copyright (c) 2004 Jeffrey M. Hsu. All rights reserved.
3 * Copyright (c) 2004 The DragonFly Project. All rights reserved.
5 * This code is derived from software contributed to The DragonFly Project
6 * by Jeffrey M. Hsu.
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 DragonFly Project nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific, prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
30 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
35 * Copyright (c) 1982, 1986, 1991, 1993, 1995
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by the University of
49 * California, Berkeley and its contributors.
50 * 4. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
66 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95
67 * $FreeBSD: src/sys/netinet/in_pcb.c,v 1.59.2.27 2004/01/02 04:06:42 ambrisko Exp $
68 * $DragonFly: src/sys/netinet/in_pcb.c,v 1.46 2008/06/08 08:38:05 sephe Exp $
71 #include "opt_ipsec.h"
72 #include "opt_inet6.h"
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/proc.h>
83 #include <sys/jail.h>
84 #include <sys/kernel.h>
85 #include <sys/sysctl.h>
86 #include <sys/thread2.h>
88 #include <machine/limits.h>
90 #include <vm/vm_zone.h>
92 #include <net/if.h>
93 #include <net/if_types.h>
94 #include <net/route.h>
96 #include <netinet/in.h>
97 #include <netinet/in_pcb.h>
98 #include <netinet/in_var.h>
99 #include <netinet/ip_var.h>
100 #ifdef INET6
101 #include <netinet/ip6.h>
102 #include <netinet6/ip6_var.h>
103 #endif /* INET6 */
105 #ifdef IPSEC
106 #include <netinet6/ipsec.h>
107 #include <netproto/key/key.h>
108 #endif
110 #ifdef FAST_IPSEC
111 #if defined(IPSEC) || defined(IPSEC_ESP)
112 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
113 #endif
115 #include <netproto/ipsec/ipsec.h>
116 #include <netproto/ipsec/key.h>
117 #define IPSEC
118 #endif /* FAST_IPSEC */
120 struct in_addr zeroin_addr;
123 * These configure the range of local port addresses assigned to
124 * "unspecified" outgoing connections/packets/whatever.
126 int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */
127 int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */
129 int ipport_firstauto = IPPORT_RESERVED; /* 1024 */
130 int ipport_lastauto = IPPORT_USERRESERVED; /* 5000 */
132 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
133 int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */
135 static __inline void
136 RANGECHK(int var, int min, int max)
138 if (var < min)
139 var = min;
140 else if (var > max)
141 var = max;
144 static int
145 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
147 int error;
149 error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
150 if (!error) {
151 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
152 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
154 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
155 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
157 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
158 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
160 return (error);
163 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
165 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
166 &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
167 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
168 &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
169 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
170 &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
171 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
172 &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
173 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
174 &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
175 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
176 &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
179 * in_pcb.c: manage the Protocol Control Blocks.
181 * NOTE: It is assumed that most of these functions will be called from
182 * a critical section. XXX - There are, unfortunately, a few exceptions
183 * to this rule that should be fixed.
185 * NOTE: The caller should initialize the cpu field to the cpu running the
186 * protocol stack associated with this inpcbinfo.
189 void
190 in_pcbinfo_init(struct inpcbinfo *pcbinfo)
192 LIST_INIT(&pcbinfo->pcblisthead);
193 pcbinfo->cpu = -1;
197 * Allocate a PCB and associate it with the socket.
200 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
202 struct inpcb *inp;
203 #ifdef IPSEC
204 int error;
205 #endif
207 inp = zalloc(pcbinfo->ipi_zone);
208 if (inp == NULL)
209 return (ENOBUFS);
210 bzero(inp, sizeof *inp);
211 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
212 inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo;
213 inp->inp_socket = so;
214 #ifdef IPSEC
215 error = ipsec_init_policy(so, &inp->inp_sp);
216 if (error != 0) {
217 zfree(pcbinfo->ipi_zone, inp);
218 return (error);
220 #endif
221 #ifdef INET6
222 if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only)
223 inp->inp_flags |= IN6P_IPV6_V6ONLY;
224 if (ip6_auto_flowlabel)
225 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
226 #endif
227 so->so_pcb = inp;
228 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list);
229 pcbinfo->ipi_count++;
230 return (0);
234 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
236 struct socket *so = inp->inp_socket;
237 struct proc *p = td->td_proc;
238 unsigned short *lastport;
239 struct sockaddr_in *sin;
240 struct sockaddr_in jsin;
241 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
242 struct ucred *cred = NULL;
243 u_short lport = 0;
244 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
245 int error;
247 KKASSERT(p);
249 if (TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) /* XXX broken! */
250 return (EADDRNOTAVAIL);
251 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
252 return (EINVAL); /* already bound */
253 if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
254 wild = 1; /* neither SO_REUSEADDR nor SO_REUSEPORT is set */
255 if (p)
256 cred = p->p_ucred;
257 if (nam != NULL) {
258 sin = (struct sockaddr_in *)nam;
259 if (nam->sa_len != sizeof *sin)
260 return (EINVAL);
261 #ifdef notdef
263 * We should check the family, but old programs
264 * incorrectly fail to initialize it.
266 if (sin->sin_family != AF_INET)
267 return (EAFNOSUPPORT);
268 #endif
269 if (!prison_replace_wildcards(td, nam))
270 return (EINVAL);
271 lport = sin->sin_port;
272 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
274 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
275 * allow complete duplication of binding if
276 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
277 * and a multicast address is bound on both
278 * new and duplicated sockets.
280 if (so->so_options & SO_REUSEADDR)
281 reuseport = SO_REUSEADDR | SO_REUSEPORT;
282 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
283 sin->sin_port = 0; /* yech... */
284 bzero(&sin->sin_zero, sizeof sin->sin_zero);
285 if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL)
286 return (EADDRNOTAVAIL);
288 if (lport != 0) {
289 struct inpcb *t;
291 /* GROSS */
292 if (ntohs(lport) < IPPORT_RESERVED &&
293 cred && suser_cred(cred, PRISON_ROOT))
294 return (EACCES);
295 if (so->so_cred->cr_uid != 0 &&
296 !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
297 t = in_pcblookup_local(inp->inp_pcbinfo,
298 sin->sin_addr, lport,
299 INPLOOKUP_WILDCARD, cred);
300 if (t &&
301 (!in_nullhost(sin->sin_addr) ||
302 !in_nullhost(t->inp_laddr) ||
303 (t->inp_socket->so_options &
304 SO_REUSEPORT) == 0) &&
305 (so->so_cred->cr_uid !=
306 t->inp_socket->so_cred->cr_uid)) {
307 #ifdef INET6
308 if (!in_nullhost(sin->sin_addr) ||
309 !in_nullhost(t->inp_laddr) ||
310 INP_SOCKAF(so) ==
311 INP_SOCKAF(t->inp_socket))
312 #endif
313 return (EADDRINUSE);
316 if (cred && !prison_replace_wildcards(td, nam))
317 return (EADDRNOTAVAIL);
318 t = in_pcblookup_local(pcbinfo, sin->sin_addr, lport,
319 wild, cred);
320 if (t && !(reuseport & t->inp_socket->so_options)) {
321 #ifdef INET6
322 if (!in_nullhost(sin->sin_addr) ||
323 !in_nullhost(t->inp_laddr) ||
324 INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))
325 #endif
326 return (EADDRINUSE);
329 inp->inp_laddr = sin->sin_addr;
331 if (lport == 0) {
332 ushort first, last;
333 int count;
335 jsin.sin_family = AF_INET;
336 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
337 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) {
338 inp->inp_laddr.s_addr = INADDR_ANY;
339 return (EINVAL);
341 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
343 inp->inp_flags |= INP_ANONPORT;
345 if (inp->inp_flags & INP_HIGHPORT) {
346 first = ipport_hifirstauto; /* sysctl */
347 last = ipport_hilastauto;
348 lastport = &pcbinfo->lasthi;
349 } else if (inp->inp_flags & INP_LOWPORT) {
350 if (cred &&
351 (error = suser_cred(cred, PRISON_ROOT))) {
352 inp->inp_laddr.s_addr = INADDR_ANY;
353 return (error);
355 first = ipport_lowfirstauto; /* 1023 */
356 last = ipport_lowlastauto; /* 600 */
357 lastport = &pcbinfo->lastlow;
358 } else {
359 first = ipport_firstauto; /* sysctl */
360 last = ipport_lastauto;
361 lastport = &pcbinfo->lastport;
364 * Simple check to ensure all ports are not used up causing
365 * a deadlock here.
367 * We split the two cases (up and down) so that the direction
368 * is not being tested on each round of the loop.
370 if (first > last) {
372 * counting down
374 count = first - last;
376 do {
377 if (count-- < 0) { /* completely used? */
378 inp->inp_laddr.s_addr = INADDR_ANY;
379 return (EADDRNOTAVAIL);
381 --*lastport;
382 if (*lastport > first || *lastport < last)
383 *lastport = first;
384 lport = htons(*lastport);
385 } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
386 lport, wild, cred));
387 } else {
389 * counting up
391 count = last - first;
393 do {
394 if (count-- < 0) { /* completely used? */
395 inp->inp_laddr.s_addr = INADDR_ANY;
396 return (EADDRNOTAVAIL);
398 ++*lastport;
399 if (*lastport < first || *lastport > last)
400 *lastport = first;
401 lport = htons(*lastport);
402 } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
403 lport, wild, cred));
406 inp->inp_lport = lport;
408 jsin.sin_family = AF_INET;
409 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
410 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin)) {
411 inp->inp_laddr.s_addr = INADDR_ANY;
412 inp->inp_lport = 0;
413 return (EINVAL);
415 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
417 if (in_pcbinsporthash(inp) != 0) {
418 inp->inp_laddr.s_addr = INADDR_ANY;
419 inp->inp_lport = 0;
420 return (EAGAIN);
422 return (0);
426 * Transform old in_pcbconnect() into an inner subroutine for new
427 * in_pcbconnect(): Do some validity-checking on the remote
428 * address (in mbuf 'nam') and then determine local host address
429 * (i.e., which interface) to use to access that remote host.
431 * This preserves definition of in_pcbconnect(), while supporting a
432 * slightly different version for T/TCP. (This is more than
433 * a bit of a kludge, but cleaning up the internal interfaces would
434 * have forced minor changes in every protocol).
437 in_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
438 struct sockaddr_in **plocal_sin, struct thread *td)
440 struct in_ifaddr *ia;
441 struct ucred *cred = NULL;
442 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
443 struct sockaddr *jsin;
444 int jailed = 0, alloc_route = 0;
446 if (nam->sa_len != sizeof *sin)
447 return (EINVAL);
448 if (sin->sin_family != AF_INET)
449 return (EAFNOSUPPORT);
450 if (sin->sin_port == 0)
451 return (EADDRNOTAVAIL);
452 if (td && td->td_proc && td->td_proc->p_ucred)
453 cred = td->td_proc->p_ucred;
454 if (cred && cred->cr_prison)
455 jailed = 1;
456 if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) {
457 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
459 * If the destination address is INADDR_ANY,
460 * use the primary local address.
461 * If the supplied address is INADDR_BROADCAST,
462 * and the primary interface supports broadcast,
463 * choose the broadcast address for that interface.
465 if (sin->sin_addr.s_addr == INADDR_ANY)
466 sin->sin_addr = IA_SIN(ia)->sin_addr;
467 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
468 (ia->ia_ifp->if_flags & IFF_BROADCAST))
469 sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr;
471 if (inp->inp_laddr.s_addr == INADDR_ANY) {
472 struct route *ro;
474 ia = (struct in_ifaddr *)NULL;
476 * If route is known or can be allocated now,
477 * our src addr is taken from the i/f, else punt.
478 * Note that we should check the address family of the cached
479 * destination, in case of sharing the cache with IPv6.
481 ro = &inp->inp_route;
482 if (ro->ro_rt &&
483 (!(ro->ro_rt->rt_flags & RTF_UP) ||
484 ro->ro_dst.sa_family != AF_INET ||
485 satosin(&ro->ro_dst)->sin_addr.s_addr !=
486 sin->sin_addr.s_addr ||
487 inp->inp_socket->so_options & SO_DONTROUTE)) {
488 RTFREE(ro->ro_rt);
489 ro->ro_rt = (struct rtentry *)NULL;
491 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/
492 (ro->ro_rt == (struct rtentry *)NULL ||
493 ro->ro_rt->rt_ifp == (struct ifnet *)NULL)) {
494 /* No route yet, so try to acquire one */
495 bzero(&ro->ro_dst, sizeof(struct sockaddr_in));
496 ro->ro_dst.sa_family = AF_INET;
497 ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
498 ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
499 sin->sin_addr;
500 rtalloc(ro);
501 alloc_route = 1;
504 * If we found a route, use the address
505 * corresponding to the outgoing interface
506 * unless it is the loopback (in case a route
507 * to our address on another net goes to loopback).
509 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
510 if (jailed) {
511 if (jailed_ip(cred->cr_prison,
512 ro->ro_rt->rt_ifa->ifa_addr)) {
513 ia = ifatoia(ro->ro_rt->rt_ifa);
515 } else {
516 ia = ifatoia(ro->ro_rt->rt_ifa);
519 if (ia == NULL) {
520 u_short fport = sin->sin_port;
522 sin->sin_port = 0;
523 ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
524 if (ia && jailed && !jailed_ip(cred->cr_prison,
525 sintosa(&ia->ia_addr)))
526 ia = NULL;
527 if (ia == NULL)
528 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
529 if (ia && jailed && !jailed_ip(cred->cr_prison,
530 sintosa(&ia->ia_addr)))
531 ia = NULL;
532 sin->sin_port = fport;
533 if (ia == NULL &&
534 !TAILQ_EMPTY(&in_ifaddrheads[mycpuid]))
535 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
536 if (ia && jailed && !jailed_ip(cred->cr_prison,
537 sintosa(&ia->ia_addr)))
538 ia = NULL;
540 if (!jailed && ia == NULL)
541 goto fail;
544 * If the destination address is multicast and an outgoing
545 * interface has been set as a multicast option, use the
546 * address of that interface as our source address.
548 if (!jailed && IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
549 inp->inp_moptions != NULL) {
550 struct ip_moptions *imo;
551 struct ifnet *ifp;
553 imo = inp->inp_moptions;
554 if (imo->imo_multicast_ifp != NULL) {
555 struct in_ifaddr_container *iac;
557 ifp = imo->imo_multicast_ifp;
558 ia = NULL;
559 TAILQ_FOREACH(iac,
560 &in_ifaddrheads[mycpuid], ia_link) {
561 if (iac->ia->ia_ifp == ifp) {
562 ia = iac->ia;
563 break;
566 if (ia == NULL)
567 goto fail;
571 * Don't do pcblookup call here; return interface in plocal_sin
572 * and exit to caller, that will do the lookup.
574 if (ia == NULL && jailed) {
575 if ((jsin = prison_get_nonlocal(cred->cr_prison, AF_INET, NULL)) != NULL ||
576 (jsin = prison_get_local(cred->cr_prison, AF_INET, NULL)) != NULL) {
577 *plocal_sin = satosin(jsin);
578 } else {
579 /* IPv6 only Jail */
580 goto fail;
582 } else {
583 *plocal_sin = &ia->ia_addr;
586 return (0);
587 fail:
588 if (alloc_route) {
589 struct route *ro = &inp->inp_route;
591 if (ro->ro_rt != NULL)
592 RTFREE(ro->ro_rt);
593 bzero(ro, sizeof(*ro));
595 return (EADDRNOTAVAIL);
599 * Outer subroutine:
600 * Connect from a socket to a specified address.
601 * Both address and port must be specified in argument sin.
602 * If don't have a local address for this socket yet,
603 * then pick one.
606 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
608 struct sockaddr_in *if_sin;
609 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
610 int error;
612 /* Call inner routine to assign local interface address. */
613 if ((error = in_pcbladdr(inp, nam, &if_sin, td)) != 0)
614 return (error);
616 if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port,
617 inp->inp_laddr.s_addr ? inp->inp_laddr : if_sin->sin_addr,
618 inp->inp_lport, FALSE, NULL) != NULL) {
619 return (EADDRINUSE);
621 if (inp->inp_laddr.s_addr == INADDR_ANY) {
622 if (inp->inp_lport == 0) {
623 error = in_pcbbind(inp, (struct sockaddr *)NULL, td);
624 if (error)
625 return (error);
627 inp->inp_laddr = if_sin->sin_addr;
629 inp->inp_faddr = sin->sin_addr;
630 inp->inp_fport = sin->sin_port;
631 in_pcbinsconnhash(inp);
632 return (0);
635 void
636 in_pcbdisconnect(struct inpcb *inp)
639 inp->inp_faddr.s_addr = INADDR_ANY;
640 inp->inp_fport = 0;
641 in_pcbremconnhash(inp);
642 if (inp->inp_socket->so_state & SS_NOFDREF)
643 in_pcbdetach(inp);
646 void
647 in_pcbdetach(struct inpcb *inp)
649 struct socket *so = inp->inp_socket;
650 struct inpcbinfo *ipi = inp->inp_pcbinfo;
652 #ifdef IPSEC
653 ipsec4_delete_pcbpolicy(inp);
654 #endif /*IPSEC*/
655 inp->inp_gencnt = ++ipi->ipi_gencnt;
656 in_pcbremlists(inp);
657 so->so_pcb = 0;
658 sofree(so);
659 if (inp->inp_options)
660 m_free(inp->inp_options);
661 if (inp->inp_route.ro_rt)
662 rtfree(inp->inp_route.ro_rt);
663 ip_freemoptions(inp->inp_moptions);
664 inp->inp_vflag = 0;
665 zfree(ipi->ipi_zone, inp);
669 * The calling convention of in_setsockaddr() and in_setpeeraddr() was
670 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
671 * in struct pr_usrreqs, so that protocols can just reference then directly
672 * without the need for a wrapper function. The socket must have a valid
673 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
674 * except through a kernel programming error, so it is acceptable to panic
675 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
676 * because there actually /is/ a programming error somewhere... XXX)
679 in_setsockaddr(struct socket *so, struct sockaddr **nam)
681 struct inpcb *inp;
682 struct sockaddr_in *sin;
685 * Do the malloc first in case it blocks.
687 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
688 M_WAITOK | M_ZERO);
689 sin->sin_family = AF_INET;
690 sin->sin_len = sizeof *sin;
692 crit_enter();
693 inp = so->so_pcb;
694 if (!inp) {
695 crit_exit();
696 kfree(sin, M_SONAME);
697 return (ECONNRESET);
699 sin->sin_port = inp->inp_lport;
700 sin->sin_addr = inp->inp_laddr;
701 crit_exit();
703 *nam = (struct sockaddr *)sin;
704 return (0);
708 in_setpeeraddr(struct socket *so, struct sockaddr **nam)
710 struct inpcb *inp;
711 struct sockaddr_in *sin;
714 * Do the malloc first in case it blocks.
716 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
717 M_WAITOK | M_ZERO);
718 sin->sin_family = AF_INET;
719 sin->sin_len = sizeof *sin;
721 crit_enter();
722 inp = so->so_pcb;
723 if (!inp) {
724 crit_exit();
725 kfree(sin, M_SONAME);
726 return (ECONNRESET);
728 sin->sin_port = inp->inp_fport;
729 sin->sin_addr = inp->inp_faddr;
730 crit_exit();
732 *nam = (struct sockaddr *)sin;
733 return (0);
736 void
737 in_pcbnotifyall(struct inpcbhead *head, struct in_addr faddr, int err,
738 void (*notify)(struct inpcb *, int))
740 struct inpcb *inp, *ninp;
743 * note: if INP_PLACEMARKER is set we must ignore the rest of
744 * the structure and skip it.
746 crit_enter();
747 LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) {
748 if (inp->inp_flags & INP_PLACEMARKER)
749 continue;
750 #ifdef INET6
751 if (!(inp->inp_vflag & INP_IPV4))
752 continue;
753 #endif
754 if (inp->inp_faddr.s_addr != faddr.s_addr ||
755 inp->inp_socket == NULL)
756 continue;
757 (*notify)(inp, err); /* can remove inp from list! */
759 crit_exit();
762 void
763 in_pcbpurgeif0(struct inpcb *head, struct ifnet *ifp)
765 struct inpcb *inp;
766 struct ip_moptions *imo;
767 int i, gap;
769 for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
770 if (inp->inp_flags & INP_PLACEMARKER)
771 continue;
772 imo = inp->inp_moptions;
773 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) {
775 * Unselect the outgoing interface if it is being
776 * detached.
778 if (imo->imo_multicast_ifp == ifp)
779 imo->imo_multicast_ifp = NULL;
782 * Drop multicast group membership if we joined
783 * through the interface being detached.
785 for (i = 0, gap = 0; i < imo->imo_num_memberships;
786 i++) {
787 if (imo->imo_membership[i]->inm_ifp == ifp) {
788 in_delmulti(imo->imo_membership[i]);
789 gap++;
790 } else if (gap != 0)
791 imo->imo_membership[i - gap] =
792 imo->imo_membership[i];
794 imo->imo_num_memberships -= gap;
800 * Check for alternatives when higher level complains
801 * about service problems. For now, invalidate cached
802 * routing information. If the route was created dynamically
803 * (by a redirect), time to try a default gateway again.
805 void
806 in_losing(struct inpcb *inp)
808 struct rtentry *rt;
809 struct rt_addrinfo rtinfo;
811 if ((rt = inp->inp_route.ro_rt)) {
812 bzero(&rtinfo, sizeof(struct rt_addrinfo));
813 rtinfo.rti_info[RTAX_DST] = rt_key(rt);
814 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
815 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt);
816 rtinfo.rti_flags = rt->rt_flags;
817 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0);
818 if (rt->rt_flags & RTF_DYNAMIC)
819 rtrequest1_global(RTM_DELETE, &rtinfo, NULL, NULL);
820 inp->inp_route.ro_rt = NULL;
821 rtfree(rt);
823 * A new route can be allocated
824 * the next time output is attempted.
830 * After a routing change, flush old routing
831 * and allocate a (hopefully) better one.
833 void
834 in_rtchange(struct inpcb *inp, int err)
836 if (inp->inp_route.ro_rt) {
837 rtfree(inp->inp_route.ro_rt);
838 inp->inp_route.ro_rt = NULL;
840 * A new route can be allocated the next time
841 * output is attempted.
847 * Lookup a PCB based on the local address and port.
849 struct inpcb *
850 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
851 u_int lport_arg, int wild_okay, struct ucred *cred)
853 struct inpcb *inp;
854 int matchwild = 3, wildcard;
855 u_short lport = lport_arg;
857 struct inpcbporthead *porthash;
858 struct inpcbport *phd;
859 struct inpcb *match = NULL;
862 * Best fit PCB lookup.
864 * First see if this local port is in use by looking on the
865 * port hash list.
867 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
868 pcbinfo->porthashmask)];
869 LIST_FOREACH(phd, porthash, phd_hash) {
870 if (phd->phd_port == lport)
871 break;
873 if (phd != NULL) {
875 * Port is in use by one or more PCBs. Look for best
876 * fit.
878 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
879 wildcard = 0;
880 #ifdef INET6
881 if ((inp->inp_vflag & INP_IPV4) == 0)
882 continue;
883 #endif
884 if (inp->inp_faddr.s_addr != INADDR_ANY)
885 wildcard++;
886 if (inp->inp_laddr.s_addr != INADDR_ANY) {
887 if (laddr.s_addr == INADDR_ANY)
888 wildcard++;
889 else if (inp->inp_laddr.s_addr != laddr.s_addr)
890 continue;
891 } else {
892 if (laddr.s_addr != INADDR_ANY)
893 wildcard++;
895 if (wildcard && !wild_okay)
896 continue;
897 if (wildcard < matchwild &&
898 (cred == NULL ||
899 cred->cr_prison ==
900 inp->inp_socket->so_cred->cr_prison)) {
901 match = inp;
902 matchwild = wildcard;
903 if (matchwild == 0) {
904 break;
909 return (match);
913 * Lookup PCB in hash list.
915 struct inpcb *
916 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport_arg,
917 struct in_addr laddr, u_int lport_arg, boolean_t wildcard,
918 struct ifnet *ifp)
920 struct inpcbhead *head;
921 struct inpcb *inp, *jinp=NULL;
922 u_short fport = fport_arg, lport = lport_arg;
925 * First look for an exact match.
927 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport,
928 laddr.s_addr, lport, pcbinfo->hashmask)];
929 LIST_FOREACH(inp, head, inp_hash) {
930 #ifdef INET6
931 if (!(inp->inp_vflag & INP_IPV4))
932 continue;
933 #endif
934 if (in_hosteq(inp->inp_faddr, faddr) &&
935 in_hosteq(inp->inp_laddr, laddr) &&
936 inp->inp_fport == fport && inp->inp_lport == lport) {
937 /* found */
938 if (inp->inp_socket == NULL ||
939 inp->inp_socket->so_cred->cr_prison == NULL) {
940 return (inp);
941 } else {
942 if (jinp == NULL)
943 jinp = inp;
947 if (jinp != NULL)
948 return (jinp);
949 if (wildcard) {
950 struct inpcb *local_wild = NULL;
951 struct inpcb *jinp_wild = NULL;
952 #ifdef INET6
953 struct inpcb *local_wild_mapped = NULL;
954 #endif
955 struct inpcontainer *ic;
956 struct inpcontainerhead *chead;
957 struct sockaddr_in jsin;
958 struct ucred *cred;
961 * Order of socket selection:
962 * 1. non-jailed, non-wild.
963 * 2. non-jailed, wild.
964 * 3. jailed, non-wild.
965 * 4. jailed, wild.
967 jsin.sin_family = AF_INET;
968 chead = &pcbinfo->wildcardhashbase[
969 INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)];
970 LIST_FOREACH(ic, chead, ic_list) {
971 inp = ic->ic_inp;
972 jsin.sin_addr.s_addr = laddr.s_addr;
973 #ifdef INET6
974 if (!(inp->inp_vflag & INP_IPV4))
975 continue;
976 #endif
977 if (inp->inp_socket != NULL)
978 cred = inp->inp_socket->so_cred;
979 else
980 cred = NULL;
981 if (cred != NULL && jailed(cred)) {
982 if (jinp != NULL)
983 continue;
984 else
985 if (!jailed_ip(cred->cr_prison,
986 (struct sockaddr *)&jsin))
987 continue;
989 if (inp->inp_lport == lport) {
990 if (ifp && ifp->if_type == IFT_FAITH &&
991 !(inp->inp_flags & INP_FAITH))
992 continue;
993 if (inp->inp_laddr.s_addr == laddr.s_addr) {
994 if (cred != NULL && jailed(cred))
995 jinp = inp;
996 else
997 return (inp);
999 if (inp->inp_laddr.s_addr == INADDR_ANY) {
1000 #ifdef INET6
1001 if (INP_CHECK_SOCKAF(inp->inp_socket,
1002 AF_INET6))
1003 local_wild_mapped = inp;
1004 else
1005 #endif
1006 if (cred != NULL &&
1007 jailed(cred))
1008 jinp_wild = inp;
1009 else
1010 local_wild = inp;
1014 if (local_wild != NULL)
1015 return (local_wild);
1016 #ifdef INET6
1017 if (local_wild_mapped != NULL)
1018 return (local_wild_mapped);
1019 #endif
1020 if (jinp != NULL)
1021 return (jinp);
1022 return (jinp_wild);
1026 * Not found.
1028 return (NULL);
1032 * Insert PCB into connection hash table.
1034 void
1035 in_pcbinsconnhash(struct inpcb *inp)
1037 struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo;
1038 struct inpcbhead *bucket;
1039 u_int32_t hashkey_faddr, hashkey_laddr;
1041 #ifdef INET6
1042 if (inp->inp_vflag & INP_IPV6) {
1043 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */;
1044 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */;
1045 } else {
1046 #endif
1047 hashkey_faddr = inp->inp_faddr.s_addr;
1048 hashkey_laddr = inp->inp_laddr.s_addr;
1049 #ifdef INET6
1051 #endif
1053 KASSERT(!(inp->inp_flags & INP_CONNECTED), ("already on hash list"));
1054 inp->inp_flags |= INP_CONNECTED;
1057 * Insert into the connection hash table.
1059 bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr,
1060 inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)];
1061 LIST_INSERT_HEAD(bucket, inp, inp_hash);
1065 * Remove PCB from connection hash table.
1067 void
1068 in_pcbremconnhash(struct inpcb *inp)
1070 KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected"));
1071 LIST_REMOVE(inp, inp_hash);
1072 inp->inp_flags &= ~INP_CONNECTED;
1076 * Insert PCB into port hash table.
1079 in_pcbinsporthash(struct inpcb *inp)
1081 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1082 struct inpcbporthead *pcbporthash;
1083 struct inpcbport *phd;
1086 * Insert into the port hash table.
1088 pcbporthash = &pcbinfo->porthashbase[
1089 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)];
1091 /* Go through port list and look for a head for this lport. */
1092 LIST_FOREACH(phd, pcbporthash, phd_hash)
1093 if (phd->phd_port == inp->inp_lport)
1094 break;
1096 /* If none exists, malloc one and tack it on. */
1097 if (phd == NULL) {
1098 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport),
1099 M_PCB, M_INTWAIT | M_NULLOK);
1100 if (phd == NULL)
1101 return (ENOBUFS); /* XXX */
1102 phd->phd_port = inp->inp_lport;
1103 LIST_INIT(&phd->phd_pcblist);
1104 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1107 inp->inp_phd = phd;
1108 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1110 return (0);
1113 void
1114 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1116 struct inpcontainer *ic;
1117 struct inpcontainerhead *bucket;
1119 bucket = &pcbinfo->wildcardhashbase[
1120 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1122 ic = kmalloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT);
1123 ic->ic_inp = inp;
1124 LIST_INSERT_HEAD(bucket, ic, ic_list);
1128 * Insert PCB into wildcard hash table.
1130 void
1131 in_pcbinswildcardhash(struct inpcb *inp)
1133 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1135 KKASSERT(pcbinfo != NULL);
1137 in_pcbinswildcardhash_oncpu(inp, pcbinfo);
1138 inp->inp_flags |= INP_WILDCARD;
1141 void
1142 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1144 struct inpcontainer *ic;
1145 struct inpcontainerhead *head;
1147 /* find bucket */
1148 head = &pcbinfo->wildcardhashbase[
1149 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1151 LIST_FOREACH(ic, head, ic_list) {
1152 if (ic->ic_inp == inp)
1153 goto found;
1155 return; /* not found! */
1157 found:
1158 LIST_REMOVE(ic, ic_list); /* remove container from bucket chain */
1159 kfree(ic, M_TEMP); /* deallocate container */
1163 * Remove PCB from wildcard hash table.
1165 void
1166 in_pcbremwildcardhash(struct inpcb *inp)
1168 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1170 KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard"));
1171 in_pcbremwildcardhash_oncpu(inp, pcbinfo);
1172 inp->inp_flags &= ~INP_WILDCARD;
1176 * Remove PCB from various lists.
1178 void
1179 in_pcbremlists(struct inpcb *inp)
1181 if (inp->inp_lport) {
1182 struct inpcbport *phd = inp->inp_phd;
1184 LIST_REMOVE(inp, inp_portlist);
1185 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1186 LIST_REMOVE(phd, phd_hash);
1187 kfree(phd, M_PCB);
1190 if (inp->inp_flags & INP_WILDCARD) {
1191 in_pcbremwildcardhash(inp);
1192 } else if (inp->inp_flags & INP_CONNECTED) {
1193 in_pcbremconnhash(inp);
1195 LIST_REMOVE(inp, inp_list);
1196 inp->inp_pcbinfo->ipi_count--;
1200 prison_xinpcb(struct thread *td, struct inpcb *inp)
1202 struct ucred *cr;
1204 if (td->td_proc == NULL)
1205 return (0);
1206 cr = td->td_proc->p_ucred;
1207 if (cr->cr_prison == NULL)
1208 return (0);
1209 if (inp->inp_socket && inp->inp_socket->so_cred &&
1210 inp->inp_socket->so_cred->cr_prison &&
1211 cr->cr_prison == inp->inp_socket->so_cred->cr_prison)
1212 return (0);
1213 return (1);
1217 in_pcblist_global(SYSCTL_HANDLER_ARGS)
1219 struct inpcbinfo *pcbinfo = arg1;
1220 struct inpcb *inp, *marker;
1221 struct xinpcb xi;
1222 int error, i, n;
1223 inp_gen_t gencnt;
1226 * The process of preparing the TCB list is too time-consuming and
1227 * resource-intensive to repeat twice on every request.
1229 if (req->oldptr == NULL) {
1230 n = pcbinfo->ipi_count;
1231 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb);
1232 return 0;
1235 if (req->newptr != NULL)
1236 return EPERM;
1239 * OK, now we're committed to doing something. Re-fetch ipi_count
1240 * after obtaining the generation count.
1242 gencnt = pcbinfo->ipi_gencnt;
1243 n = pcbinfo->ipi_count;
1245 marker = kmalloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO);
1246 marker->inp_flags |= INP_PLACEMARKER;
1247 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
1249 i = 0;
1250 error = 0;
1252 while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) {
1253 LIST_REMOVE(marker, inp_list);
1254 LIST_INSERT_AFTER(inp, marker, inp_list);
1256 if (inp->inp_flags & INP_PLACEMARKER)
1257 continue;
1258 if (inp->inp_gencnt > gencnt)
1259 continue;
1260 if (prison_xinpcb(req->td, inp))
1261 continue;
1262 bzero(&xi, sizeof xi);
1263 xi.xi_len = sizeof xi;
1264 bcopy(inp, &xi.xi_inp, sizeof *inp);
1265 if (inp->inp_socket)
1266 sotoxsocket(inp->inp_socket, &xi.xi_socket);
1267 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0)
1268 break;
1269 ++i;
1271 LIST_REMOVE(marker, inp_list);
1272 if (error == 0 && i < n) {
1273 bzero(&xi, sizeof xi);
1274 xi.xi_len = sizeof xi;
1275 while (i < n) {
1276 error = SYSCTL_OUT(req, &xi, sizeof xi);
1277 ++i;
1280 kfree(marker, M_TEMP);
1281 return(error);