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
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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;
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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
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
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
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45 * documentation and/or other materials provided with the distribution.
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48 * This product includes software developed by the University of
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51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
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55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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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
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 1.48 2008/11/08 03:38:23 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>
78 #include <sys/domain.h>
79 #include <sys/protosw.h>
80 #include <sys/socket.h>
81 #include <sys/socketvar.h>
85 #include <sys/kernel.h>
86 #include <sys/sysctl.h>
87 #include <sys/thread2.h>
89 #include <machine/limits.h>
92 #include <net/if_types.h>
93 #include <net/route.h>
95 #include <netinet/in.h>
96 #include <netinet/in_pcb.h>
97 #include <netinet/in_var.h>
98 #include <netinet/ip_var.h>
100 #include <netinet/ip6.h>
101 #include <netinet6/ip6_var.h>
105 #include <netinet6/ipsec.h>
106 #include <netproto/key/key.h>
110 #if defined(IPSEC) || defined(IPSEC_ESP)
111 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
114 #include <netproto/ipsec/ipsec.h>
115 #include <netproto/ipsec/key.h>
117 #endif /* FAST_IPSEC */
119 struct in_addr zeroin_addr;
122 * These configure the range of local port addresses assigned to
123 * "unspecified" outgoing connections/packets/whatever.
125 int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */
126 int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */
128 int ipport_firstauto = IPPORT_RESERVED; /* 1024 */
129 int ipport_lastauto = IPPORT_USERRESERVED; /* 5000 */
131 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
132 int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */
134 #define RANGECHK(var, min, max) \
135 if ((var) < (min)) { (var) = (min); } \
136 else if ((var) > (max)) { (var) = (max); }
139 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
143 error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
145 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
146 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
148 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
149 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
151 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
152 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
159 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
161 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
162 &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
163 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
164 &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
165 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
166 &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
167 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
168 &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
169 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
170 &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
171 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
172 &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
175 * in_pcb.c: manage the Protocol Control Blocks.
177 * NOTE: It is assumed that most of these functions will be called from
178 * a critical section. XXX - There are, unfortunately, a few exceptions
179 * to this rule that should be fixed.
181 * NOTE: The caller should initialize the cpu field to the cpu running the
182 * protocol stack associated with this inpcbinfo.
186 in_pcbinfo_init(struct inpcbinfo *pcbinfo)
188 LIST_INIT(&pcbinfo->pcblisthead);
193 * Allocate a PCB and associate it with the socket.
196 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
203 inp = kmalloc(pcbinfo->ipi_size, M_PCB, M_WAITOK|M_ZERO);
204 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
205 inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo;
206 inp->inp_socket = so;
208 error = ipsec_init_policy(so, &inp->inp_sp);
215 if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only)
216 inp->inp_flags |= IN6P_IPV6_V6ONLY;
217 if (ip6_auto_flowlabel)
218 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
221 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list);
222 pcbinfo->ipi_count++;
227 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
229 struct socket *so = inp->inp_socket;
230 struct proc *p = td->td_proc;
231 unsigned short *lastport;
232 struct sockaddr_in *sin;
233 struct sockaddr_in jsin;
234 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
235 struct ucred *cred = NULL;
237 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
242 if (TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) /* XXX broken! */
243 return (EADDRNOTAVAIL);
244 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
245 return (EINVAL); /* already bound */
246 if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
247 wild = 1; /* neither SO_REUSEADDR nor SO_REUSEPORT is set */
251 sin = (struct sockaddr_in *)nam;
252 if (nam->sa_len != sizeof *sin)
256 * We should check the family, but old programs
257 * incorrectly fail to initialize it.
259 if (sin->sin_family != AF_INET)
260 return (EAFNOSUPPORT);
262 if (!prison_replace_wildcards(td, nam))
264 lport = sin->sin_port;
265 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
267 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
268 * allow complete duplication of binding if
269 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
270 * and a multicast address is bound on both
271 * new and duplicated sockets.
273 if (so->so_options & SO_REUSEADDR)
274 reuseport = SO_REUSEADDR | SO_REUSEPORT;
275 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
276 sin->sin_port = 0; /* yech... */
277 bzero(&sin->sin_zero, sizeof sin->sin_zero);
278 if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL)
279 return (EADDRNOTAVAIL);
285 if (ntohs(lport) < IPPORT_RESERVED &&
286 cred && priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))
288 if (so->so_cred->cr_uid != 0 &&
289 !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
290 t = in_pcblookup_local(inp->inp_pcbinfo,
291 sin->sin_addr, lport,
292 INPLOOKUP_WILDCARD, cred);
294 (!in_nullhost(sin->sin_addr) ||
295 !in_nullhost(t->inp_laddr) ||
296 (t->inp_socket->so_options &
297 SO_REUSEPORT) == 0) &&
298 (so->so_cred->cr_uid !=
299 t->inp_socket->so_cred->cr_uid)) {
301 if (!in_nullhost(sin->sin_addr) ||
302 !in_nullhost(t->inp_laddr) ||
304 INP_SOCKAF(t->inp_socket))
309 if (cred && !prison_replace_wildcards(td, nam))
310 return (EADDRNOTAVAIL);
311 t = in_pcblookup_local(pcbinfo, sin->sin_addr, lport,
313 if (t && !(reuseport & t->inp_socket->so_options)) {
315 if (!in_nullhost(sin->sin_addr) ||
316 !in_nullhost(t->inp_laddr) ||
317 INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))
322 inp->inp_laddr = sin->sin_addr;
328 jsin.sin_family = AF_INET;
329 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
330 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) {
331 inp->inp_laddr.s_addr = INADDR_ANY;
334 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
336 inp->inp_flags |= INP_ANONPORT;
338 if (inp->inp_flags & INP_HIGHPORT) {
339 first = ipport_hifirstauto; /* sysctl */
340 last = ipport_hilastauto;
341 lastport = &pcbinfo->lasthi;
342 } else if (inp->inp_flags & INP_LOWPORT) {
344 (error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))) {
345 inp->inp_laddr.s_addr = INADDR_ANY;
348 first = ipport_lowfirstauto; /* 1023 */
349 last = ipport_lowlastauto; /* 600 */
350 lastport = &pcbinfo->lastlow;
352 first = ipport_firstauto; /* sysctl */
353 last = ipport_lastauto;
354 lastport = &pcbinfo->lastport;
357 * Simple check to ensure all ports are not used up causing
360 * We split the two cases (up and down) so that the direction
361 * is not being tested on each round of the loop.
367 count = first - last;
370 if (count-- < 0) { /* completely used? */
371 inp->inp_laddr.s_addr = INADDR_ANY;
372 return (EADDRNOTAVAIL);
375 if (*lastport > first || *lastport < last)
377 lport = htons(*lastport);
378 } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
384 count = last - first;
387 if (count-- < 0) { /* completely used? */
388 inp->inp_laddr.s_addr = INADDR_ANY;
389 return (EADDRNOTAVAIL);
392 if (*lastport < first || *lastport > last)
394 lport = htons(*lastport);
395 } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
399 inp->inp_lport = lport;
401 jsin.sin_family = AF_INET;
402 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
403 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin)) {
404 inp->inp_laddr.s_addr = INADDR_ANY;
408 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
410 if (in_pcbinsporthash(inp) != 0) {
411 inp->inp_laddr.s_addr = INADDR_ANY;
419 * Transform old in_pcbconnect() into an inner subroutine for new
420 * in_pcbconnect(): Do some validity-checking on the remote
421 * address (in mbuf 'nam') and then determine local host address
422 * (i.e., which interface) to use to access that remote host.
424 * This preserves definition of in_pcbconnect(), while supporting a
425 * slightly different version for T/TCP. (This is more than
426 * a bit of a kludge, but cleaning up the internal interfaces would
427 * have forced minor changes in every protocol).
430 in_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
431 struct sockaddr_in **plocal_sin, struct thread *td)
433 struct in_ifaddr *ia;
434 struct ucred *cred = NULL;
435 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
436 struct sockaddr *jsin;
437 int jailed = 0, alloc_route = 0;
439 if (nam->sa_len != sizeof *sin)
441 if (sin->sin_family != AF_INET)
442 return (EAFNOSUPPORT);
443 if (sin->sin_port == 0)
444 return (EADDRNOTAVAIL);
445 if (td && td->td_proc && td->td_proc->p_ucred)
446 cred = td->td_proc->p_ucred;
447 if (cred && cred->cr_prison)
449 if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) {
450 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
452 * If the destination address is INADDR_ANY,
453 * use the primary local address.
454 * If the supplied address is INADDR_BROADCAST,
455 * and the primary interface supports broadcast,
456 * choose the broadcast address for that interface.
458 if (sin->sin_addr.s_addr == INADDR_ANY)
459 sin->sin_addr = IA_SIN(ia)->sin_addr;
460 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
461 (ia->ia_ifp->if_flags & IFF_BROADCAST))
462 sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr;
464 if (inp->inp_laddr.s_addr == INADDR_ANY) {
469 * If route is known or can be allocated now,
470 * our src addr is taken from the i/f, else punt.
471 * Note that we should check the address family of the cached
472 * destination, in case of sharing the cache with IPv6.
474 ro = &inp->inp_route;
476 (!(ro->ro_rt->rt_flags & RTF_UP) ||
477 ro->ro_dst.sa_family != AF_INET ||
478 satosin(&ro->ro_dst)->sin_addr.s_addr !=
479 sin->sin_addr.s_addr ||
480 inp->inp_socket->so_options & SO_DONTROUTE)) {
484 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/
485 (ro->ro_rt == NULL ||
486 ro->ro_rt->rt_ifp == NULL)) {
487 /* No route yet, so try to acquire one */
488 bzero(&ro->ro_dst, sizeof(struct sockaddr_in));
489 ro->ro_dst.sa_family = AF_INET;
490 ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
491 ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
497 * If we found a route, use the address
498 * corresponding to the outgoing interface
499 * unless it is the loopback (in case a route
500 * to our address on another net goes to loopback).
502 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
504 if (jailed_ip(cred->cr_prison,
505 ro->ro_rt->rt_ifa->ifa_addr)) {
506 ia = ifatoia(ro->ro_rt->rt_ifa);
509 ia = ifatoia(ro->ro_rt->rt_ifa);
513 u_short fport = sin->sin_port;
516 ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
517 if (ia && jailed && !jailed_ip(cred->cr_prison,
518 sintosa(&ia->ia_addr)))
521 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
522 if (ia && jailed && !jailed_ip(cred->cr_prison,
523 sintosa(&ia->ia_addr)))
525 sin->sin_port = fport;
527 !TAILQ_EMPTY(&in_ifaddrheads[mycpuid]))
528 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
529 if (ia && jailed && !jailed_ip(cred->cr_prison,
530 sintosa(&ia->ia_addr)))
533 if (!jailed && ia == NULL)
537 * If the destination address is multicast and an outgoing
538 * interface has been set as a multicast option, use the
539 * address of that interface as our source address.
541 if (!jailed && IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
542 inp->inp_moptions != NULL) {
543 struct ip_moptions *imo;
546 imo = inp->inp_moptions;
547 if (imo->imo_multicast_ifp != NULL) {
548 struct in_ifaddr_container *iac;
550 ifp = imo->imo_multicast_ifp;
553 &in_ifaddrheads[mycpuid], ia_link) {
554 if (iac->ia->ia_ifp == ifp) {
564 * Don't do pcblookup call here; return interface in plocal_sin
565 * and exit to caller, that will do the lookup.
567 if (ia == NULL && jailed) {
568 if ((jsin = prison_get_nonlocal(cred->cr_prison, AF_INET, NULL)) != NULL ||
569 (jsin = prison_get_local(cred->cr_prison, AF_INET, NULL)) != NULL) {
570 *plocal_sin = satosin(jsin);
576 *plocal_sin = &ia->ia_addr;
582 struct route *ro = &inp->inp_route;
584 if (ro->ro_rt != NULL)
586 bzero(ro, sizeof(*ro));
588 return (EADDRNOTAVAIL);
593 * Connect from a socket to a specified address.
594 * Both address and port must be specified in argument sin.
595 * If don't have a local address for this socket yet,
599 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
601 struct sockaddr_in *if_sin;
602 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
605 /* Call inner routine to assign local interface address. */
606 if ((error = in_pcbladdr(inp, nam, &if_sin, td)) != 0)
609 if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port,
610 inp->inp_laddr.s_addr ? inp->inp_laddr : if_sin->sin_addr,
611 inp->inp_lport, FALSE, NULL) != NULL) {
614 if (inp->inp_laddr.s_addr == INADDR_ANY) {
615 if (inp->inp_lport == 0) {
616 error = in_pcbbind(inp, NULL, td);
620 inp->inp_laddr = if_sin->sin_addr;
622 inp->inp_faddr = sin->sin_addr;
623 inp->inp_fport = sin->sin_port;
624 in_pcbinsconnhash(inp);
629 in_pcbdisconnect(struct inpcb *inp)
632 inp->inp_faddr.s_addr = INADDR_ANY;
634 in_pcbremconnhash(inp);
635 if (inp->inp_socket->so_state & SS_NOFDREF)
640 in_pcbdetach(struct inpcb *inp)
642 struct socket *so = inp->inp_socket;
643 struct inpcbinfo *ipi = inp->inp_pcbinfo;
646 ipsec4_delete_pcbpolicy(inp);
648 inp->inp_gencnt = ++ipi->ipi_gencnt;
652 if (inp->inp_options)
653 m_free(inp->inp_options);
654 if (inp->inp_route.ro_rt)
655 rtfree(inp->inp_route.ro_rt);
656 ip_freemoptions(inp->inp_moptions);
662 * The calling convention of in_setsockaddr() and in_setpeeraddr() was
663 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
664 * in struct pr_usrreqs, so that protocols can just reference then directly
665 * without the need for a wrapper function. The socket must have a valid
666 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
667 * except through a kernel programming error, so it is acceptable to panic
668 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
669 * because there actually /is/ a programming error somewhere... XXX)
672 in_setsockaddr(struct socket *so, struct sockaddr **nam)
675 struct sockaddr_in *sin;
678 * Do the malloc first in case it blocks.
680 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
682 sin->sin_family = AF_INET;
683 sin->sin_len = sizeof *sin;
689 kfree(sin, M_SONAME);
692 sin->sin_port = inp->inp_lport;
693 sin->sin_addr = inp->inp_laddr;
696 *nam = (struct sockaddr *)sin;
701 in_setpeeraddr(struct socket *so, struct sockaddr **nam)
704 struct sockaddr_in *sin;
707 * Do the malloc first in case it blocks.
709 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
711 sin->sin_family = AF_INET;
712 sin->sin_len = sizeof *sin;
718 kfree(sin, M_SONAME);
721 sin->sin_port = inp->inp_fport;
722 sin->sin_addr = inp->inp_faddr;
725 *nam = (struct sockaddr *)sin;
730 in_pcbnotifyall(struct inpcbhead *head, struct in_addr faddr, int err,
731 void (*notify)(struct inpcb *, int))
733 struct inpcb *inp, *ninp;
736 * note: if INP_PLACEMARKER is set we must ignore the rest of
737 * the structure and skip it.
740 LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) {
741 if (inp->inp_flags & INP_PLACEMARKER)
744 if (!(inp->inp_vflag & INP_IPV4))
747 if (inp->inp_faddr.s_addr != faddr.s_addr ||
748 inp->inp_socket == NULL)
750 (*notify)(inp, err); /* can remove inp from list! */
756 in_pcbpurgeif0(struct inpcb *head, struct ifnet *ifp)
759 struct ip_moptions *imo;
762 for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
763 if (inp->inp_flags & INP_PLACEMARKER)
765 imo = inp->inp_moptions;
766 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) {
768 * Unselect the outgoing interface if it is being
771 if (imo->imo_multicast_ifp == ifp)
772 imo->imo_multicast_ifp = NULL;
775 * Drop multicast group membership if we joined
776 * through the interface being detached.
778 for (i = 0, gap = 0; i < imo->imo_num_memberships;
780 if (imo->imo_membership[i]->inm_ifp == ifp) {
781 in_delmulti(imo->imo_membership[i]);
784 imo->imo_membership[i - gap] =
785 imo->imo_membership[i];
787 imo->imo_num_memberships -= gap;
793 * Check for alternatives when higher level complains
794 * about service problems. For now, invalidate cached
795 * routing information. If the route was created dynamically
796 * (by a redirect), time to try a default gateway again.
799 in_losing(struct inpcb *inp)
802 struct rt_addrinfo rtinfo;
804 if ((rt = inp->inp_route.ro_rt)) {
805 bzero(&rtinfo, sizeof(struct rt_addrinfo));
806 rtinfo.rti_info[RTAX_DST] = rt_key(rt);
807 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
808 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt);
809 rtinfo.rti_flags = rt->rt_flags;
810 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0);
811 if (rt->rt_flags & RTF_DYNAMIC)
812 rtrequest1_global(RTM_DELETE, &rtinfo, NULL, NULL);
813 inp->inp_route.ro_rt = NULL;
816 * A new route can be allocated
817 * the next time output is attempted.
823 * After a routing change, flush old routing
824 * and allocate a (hopefully) better one.
827 in_rtchange(struct inpcb *inp, int err)
829 if (inp->inp_route.ro_rt) {
830 rtfree(inp->inp_route.ro_rt);
831 inp->inp_route.ro_rt = NULL;
833 * A new route can be allocated the next time
834 * output is attempted.
840 * Lookup a PCB based on the local address and port.
843 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
844 u_int lport_arg, int wild_okay, struct ucred *cred)
847 int matchwild = 3, wildcard;
848 u_short lport = lport_arg;
850 struct inpcbporthead *porthash;
851 struct inpcbport *phd;
852 struct inpcb *match = NULL;
855 * Best fit PCB lookup.
857 * First see if this local port is in use by looking on the
860 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
861 pcbinfo->porthashmask)];
862 LIST_FOREACH(phd, porthash, phd_hash) {
863 if (phd->phd_port == lport)
868 * Port is in use by one or more PCBs. Look for best
871 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
874 if ((inp->inp_vflag & INP_IPV4) == 0)
877 if (inp->inp_faddr.s_addr != INADDR_ANY)
879 if (inp->inp_laddr.s_addr != INADDR_ANY) {
880 if (laddr.s_addr == INADDR_ANY)
882 else if (inp->inp_laddr.s_addr != laddr.s_addr)
885 if (laddr.s_addr != INADDR_ANY)
888 if (wildcard && !wild_okay)
890 if (wildcard < matchwild &&
893 inp->inp_socket->so_cred->cr_prison)) {
895 matchwild = wildcard;
896 if (matchwild == 0) {
906 * Lookup PCB in hash list.
909 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport_arg,
910 struct in_addr laddr, u_int lport_arg, boolean_t wildcard,
913 struct inpcbhead *head;
914 struct inpcb *inp, *jinp=NULL;
915 u_short fport = fport_arg, lport = lport_arg;
918 * First look for an exact match.
920 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport,
921 laddr.s_addr, lport, pcbinfo->hashmask)];
922 LIST_FOREACH(inp, head, inp_hash) {
924 if (!(inp->inp_vflag & INP_IPV4))
927 if (in_hosteq(inp->inp_faddr, faddr) &&
928 in_hosteq(inp->inp_laddr, laddr) &&
929 inp->inp_fport == fport && inp->inp_lport == lport) {
931 if (inp->inp_socket == NULL ||
932 inp->inp_socket->so_cred->cr_prison == NULL) {
943 struct inpcb *local_wild = NULL;
944 struct inpcb *jinp_wild = NULL;
946 struct inpcb *local_wild_mapped = NULL;
948 struct inpcontainer *ic;
949 struct inpcontainerhead *chead;
950 struct sockaddr_in jsin;
954 * Order of socket selection:
955 * 1. non-jailed, non-wild.
956 * 2. non-jailed, wild.
957 * 3. jailed, non-wild.
960 jsin.sin_family = AF_INET;
961 chead = &pcbinfo->wildcardhashbase[
962 INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)];
963 LIST_FOREACH(ic, chead, ic_list) {
965 jsin.sin_addr.s_addr = laddr.s_addr;
967 if (!(inp->inp_vflag & INP_IPV4))
970 if (inp->inp_socket != NULL)
971 cred = inp->inp_socket->so_cred;
974 if (cred != NULL && jailed(cred)) {
978 if (!jailed_ip(cred->cr_prison,
979 (struct sockaddr *)&jsin))
982 if (inp->inp_lport == lport) {
983 if (ifp && ifp->if_type == IFT_FAITH &&
984 !(inp->inp_flags & INP_FAITH))
986 if (inp->inp_laddr.s_addr == laddr.s_addr) {
987 if (cred != NULL && jailed(cred))
992 if (inp->inp_laddr.s_addr == INADDR_ANY) {
994 if (INP_CHECK_SOCKAF(inp->inp_socket,
996 local_wild_mapped = inp;
1007 if (local_wild != NULL)
1008 return (local_wild);
1010 if (local_wild_mapped != NULL)
1011 return (local_wild_mapped);
1025 * Insert PCB into connection hash table.
1028 in_pcbinsconnhash(struct inpcb *inp)
1030 struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo;
1031 struct inpcbhead *bucket;
1032 u_int32_t hashkey_faddr, hashkey_laddr;
1035 if (inp->inp_vflag & INP_IPV6) {
1036 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */;
1037 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */;
1040 hashkey_faddr = inp->inp_faddr.s_addr;
1041 hashkey_laddr = inp->inp_laddr.s_addr;
1046 KASSERT(!(inp->inp_flags & INP_CONNECTED), ("already on hash list"));
1047 inp->inp_flags |= INP_CONNECTED;
1050 * Insert into the connection hash table.
1052 bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr,
1053 inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)];
1054 LIST_INSERT_HEAD(bucket, inp, inp_hash);
1058 * Remove PCB from connection hash table.
1061 in_pcbremconnhash(struct inpcb *inp)
1063 KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected"));
1064 LIST_REMOVE(inp, inp_hash);
1065 inp->inp_flags &= ~INP_CONNECTED;
1069 * Insert PCB into port hash table.
1072 in_pcbinsporthash(struct inpcb *inp)
1074 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1075 struct inpcbporthead *pcbporthash;
1076 struct inpcbport *phd;
1079 * Insert into the port hash table.
1081 pcbporthash = &pcbinfo->porthashbase[
1082 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)];
1084 /* Go through port list and look for a head for this lport. */
1085 LIST_FOREACH(phd, pcbporthash, phd_hash)
1086 if (phd->phd_port == inp->inp_lport)
1089 /* If none exists, malloc one and tack it on. */
1091 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport),
1092 M_PCB, M_INTWAIT | M_NULLOK);
1094 return (ENOBUFS); /* XXX */
1095 phd->phd_port = inp->inp_lport;
1096 LIST_INIT(&phd->phd_pcblist);
1097 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1101 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1107 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1109 struct inpcontainer *ic;
1110 struct inpcontainerhead *bucket;
1112 bucket = &pcbinfo->wildcardhashbase[
1113 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1115 ic = kmalloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT);
1117 LIST_INSERT_HEAD(bucket, ic, ic_list);
1121 * Insert PCB into wildcard hash table.
1124 in_pcbinswildcardhash(struct inpcb *inp)
1126 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1128 KKASSERT(pcbinfo != NULL);
1130 in_pcbinswildcardhash_oncpu(inp, pcbinfo);
1131 inp->inp_flags |= INP_WILDCARD;
1135 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1137 struct inpcontainer *ic;
1138 struct inpcontainerhead *head;
1141 head = &pcbinfo->wildcardhashbase[
1142 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1144 LIST_FOREACH(ic, head, ic_list) {
1145 if (ic->ic_inp == inp)
1148 return; /* not found! */
1151 LIST_REMOVE(ic, ic_list); /* remove container from bucket chain */
1152 kfree(ic, M_TEMP); /* deallocate container */
1156 * Remove PCB from wildcard hash table.
1159 in_pcbremwildcardhash(struct inpcb *inp)
1161 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1163 KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard"));
1164 in_pcbremwildcardhash_oncpu(inp, pcbinfo);
1165 inp->inp_flags &= ~INP_WILDCARD;
1169 * Remove PCB from various lists.
1172 in_pcbremlists(struct inpcb *inp)
1174 if (inp->inp_lport) {
1175 struct inpcbport *phd = inp->inp_phd;
1177 LIST_REMOVE(inp, inp_portlist);
1178 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1179 LIST_REMOVE(phd, phd_hash);
1183 if (inp->inp_flags & INP_WILDCARD) {
1184 in_pcbremwildcardhash(inp);
1185 } else if (inp->inp_flags & INP_CONNECTED) {
1186 in_pcbremconnhash(inp);
1188 LIST_REMOVE(inp, inp_list);
1189 inp->inp_pcbinfo->ipi_count--;
1193 prison_xinpcb(struct thread *td, struct inpcb *inp)
1197 if (td->td_proc == NULL)
1199 cr = td->td_proc->p_ucred;
1200 if (cr->cr_prison == NULL)
1202 if (inp->inp_socket && inp->inp_socket->so_cred &&
1203 inp->inp_socket->so_cred->cr_prison &&
1204 cr->cr_prison == inp->inp_socket->so_cred->cr_prison)
1210 in_pcblist_global(SYSCTL_HANDLER_ARGS)
1212 struct inpcbinfo *pcbinfo = arg1;
1213 struct inpcb *inp, *marker;
1219 * The process of preparing the TCB list is too time-consuming and
1220 * resource-intensive to repeat twice on every request.
1222 if (req->oldptr == NULL) {
1223 n = pcbinfo->ipi_count;
1224 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb);
1228 if (req->newptr != NULL)
1232 * OK, now we're committed to doing something. Re-fetch ipi_count
1233 * after obtaining the generation count.
1235 gencnt = pcbinfo->ipi_gencnt;
1236 n = pcbinfo->ipi_count;
1238 marker = kmalloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO);
1239 marker->inp_flags |= INP_PLACEMARKER;
1240 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
1245 while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) {
1246 LIST_REMOVE(marker, inp_list);
1247 LIST_INSERT_AFTER(inp, marker, inp_list);
1249 if (inp->inp_flags & INP_PLACEMARKER)
1251 if (inp->inp_gencnt > gencnt)
1253 if (prison_xinpcb(req->td, inp))
1255 bzero(&xi, sizeof xi);
1256 xi.xi_len = sizeof xi;
1257 bcopy(inp, &xi.xi_inp, sizeof *inp);
1258 if (inp->inp_socket)
1259 sotoxsocket(inp->inp_socket, &xi.xi_socket);
1260 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0)
1264 LIST_REMOVE(marker, inp_list);
1265 if (error == 0 && i < n) {
1266 bzero(&xi, sizeof xi);
1267 xi.xi_len = sizeof xi;
1269 error = SYSCTL_OUT(req, &xi, sizeof xi);
1273 kfree(marker, M_TEMP);