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;
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
35 * Copyright (c) 2004 Jeffrey M. Hsu. All rights reserved.
37 * License terms: all terms for the DragonFly license above plus the following:
39 * 4. All advertising materials mentioning features or use of this software
40 * must display the following acknowledgement:
42 * This product includes software developed by Jeffrey M. Hsu
43 * for the DragonFly Project.
45 * This requirement may be waived with permission from Jeffrey Hsu.
46 * This requirement will sunset and may be removed on July 8 2005,
47 * after which the standard DragonFly license (as shown above) will
52 * Copyright (c) 1982, 1986, 1991, 1993, 1995
53 * The Regents of the University of California. All rights reserved.
55 * Redistribution and use in source and binary forms, with or without
56 * modification, are permitted provided that the following conditions
58 * 1. Redistributions of source code must retain the above copyright
59 * notice, this list of conditions and the following disclaimer.
60 * 2. Redistributions in binary form must reproduce the above copyright
61 * notice, this list of conditions and the following disclaimer in the
62 * documentation and/or other materials provided with the distribution.
63 * 3. All advertising materials mentioning features or use of this software
64 * must display the following acknowledgement:
65 * This product includes software developed by the University of
66 * California, Berkeley and its contributors.
67 * 4. Neither the name of the University nor the names of its contributors
68 * may be used to endorse or promote products derived from this software
69 * without specific prior written permission.
71 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
72 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
73 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
74 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
75 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
76 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
77 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
78 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
79 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
80 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
83 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95
84 * $FreeBSD: src/sys/netinet/in_pcb.c,v 1.59.2.27 2004/01/02 04:06:42 ambrisko Exp $
85 * $DragonFly: src/sys/netinet/in_pcb.c,v 1.36 2005/06/02 23:52:42 dillon Exp $
88 #include "opt_ipsec.h"
89 #include "opt_inet6.h"
91 #include <sys/param.h>
92 #include <sys/systm.h>
93 #include <sys/malloc.h>
95 #include <sys/domain.h>
96 #include <sys/protosw.h>
97 #include <sys/socket.h>
98 #include <sys/socketvar.h>
100 #include <sys/jail.h>
101 #include <sys/kernel.h>
102 #include <sys/sysctl.h>
103 #include <sys/thread2.h>
105 #include <machine/limits.h>
107 #include <vm/vm_zone.h>
110 #include <net/if_types.h>
111 #include <net/route.h>
113 #include <netinet/in.h>
114 #include <netinet/in_pcb.h>
115 #include <netinet/in_var.h>
116 #include <netinet/ip_var.h>
118 #include <netinet/ip6.h>
119 #include <netinet6/ip6_var.h>
123 #include <netinet6/ipsec.h>
124 #include <netproto/key/key.h>
128 #if defined(IPSEC) || defined(IPSEC_ESP)
129 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
132 #include <netproto/ipsec/ipsec.h>
133 #include <netproto/ipsec/key.h>
135 #endif /* FAST_IPSEC */
137 struct in_addr zeroin_addr;
140 * These configure the range of local port addresses assigned to
141 * "unspecified" outgoing connections/packets/whatever.
143 int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */
144 int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */
146 int ipport_firstauto = IPPORT_RESERVED; /* 1024 */
147 int ipport_lastauto = IPPORT_USERRESERVED; /* 5000 */
149 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
150 int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */
153 RANGECHK(int var, int min, int max)
162 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
166 error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
168 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
169 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
171 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
172 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
174 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
175 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
180 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
182 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
183 &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
184 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
185 &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
186 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
187 &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
188 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
189 &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
190 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
191 &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
192 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
193 &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
196 * in_pcb.c: manage the Protocol Control Blocks.
198 * NOTE: It is assumed that most of these functions will be called from
199 * a critical section. XXX - There are, unfortunately, a few exceptions
200 * to this rule that should be fixed.
202 * NOTE: The caller should initialize the cpu field to the cpu running the
203 * protocol stack associated with this inpcbinfo.
207 in_pcbinfo_init(struct inpcbinfo *pcbinfo)
209 LIST_INIT(&pcbinfo->pcblisthead);
214 * Allocate a PCB and associate it with the socket.
217 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
224 inp = zalloc(pcbinfo->ipi_zone);
227 bzero(inp, sizeof *inp);
228 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
229 inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo;
230 inp->inp_socket = so;
232 error = ipsec_init_policy(so, &inp->inp_sp);
234 zfree(pcbinfo->ipi_zone, inp);
239 if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only)
240 inp->inp_flags |= IN6P_IPV6_V6ONLY;
241 if (ip6_auto_flowlabel)
242 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
245 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list);
246 pcbinfo->ipi_count++;
251 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
253 struct socket *so = inp->inp_socket;
254 struct proc *p = td->td_proc;
255 unsigned short *lastport;
256 struct sockaddr_in *sin;
257 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
259 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
260 int error, prison = 0;
264 if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */
265 return (EADDRNOTAVAIL);
266 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
267 return (EINVAL); /* already bound */
268 if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
269 wild = 1; /* neither SO_REUSEADDR nor SO_REUSEPORT is set */
271 sin = (struct sockaddr_in *)nam;
272 if (nam->sa_len != sizeof *sin)
276 * We should check the family, but old programs
277 * incorrectly fail to initialize it.
279 if (sin->sin_family != AF_INET)
280 return (EAFNOSUPPORT);
282 if (sin->sin_addr.s_addr != INADDR_ANY &&
283 prison_ip(td, 0, &sin->sin_addr.s_addr))
285 lport = sin->sin_port;
286 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
288 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
289 * allow complete duplication of binding if
290 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
291 * and a multicast address is bound on both
292 * new and duplicated sockets.
294 if (so->so_options & SO_REUSEADDR)
295 reuseport = SO_REUSEADDR | SO_REUSEPORT;
296 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
297 sin->sin_port = 0; /* yech... */
298 bzero(&sin->sin_zero, sizeof sin->sin_zero);
299 if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL)
300 return (EADDRNOTAVAIL);
306 if (ntohs(lport) < IPPORT_RESERVED &&
307 p && suser_cred(p->p_ucred, PRISON_ROOT))
309 if (p && p->p_ucred->cr_prison)
311 if (so->so_cred->cr_uid != 0 &&
312 !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
313 t = in_pcblookup_local(inp->inp_pcbinfo,
314 sin->sin_addr, lport,
315 prison ? 0 : INPLOOKUP_WILDCARD);
317 (!in_nullhost(sin->sin_addr) ||
318 !in_nullhost(t->inp_laddr) ||
319 (t->inp_socket->so_options &
320 SO_REUSEPORT) == 0) &&
321 (so->so_cred->cr_uid !=
322 t->inp_socket->so_cred->cr_uid)) {
324 if (!in_nullhost(sin->sin_addr) ||
325 !in_nullhost(t->inp_laddr) ||
327 INP_SOCKAF(t->inp_socket))
332 if (prison && prison_ip(td, 0, &sin->sin_addr.s_addr))
333 return (EADDRNOTAVAIL);
334 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
335 lport, prison ? 0 : wild);
336 if (t && !(reuseport & t->inp_socket->so_options)) {
338 if (!in_nullhost(sin->sin_addr) ||
339 !in_nullhost(t->inp_laddr) ||
340 INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))
345 inp->inp_laddr = sin->sin_addr;
351 if (inp->inp_laddr.s_addr != INADDR_ANY &&
352 prison_ip(td, 0, &inp->inp_laddr.s_addr )) {
353 inp->inp_laddr.s_addr = INADDR_ANY;
356 inp->inp_flags |= INP_ANONPORT;
358 if (inp->inp_flags & INP_HIGHPORT) {
359 first = ipport_hifirstauto; /* sysctl */
360 last = ipport_hilastauto;
361 lastport = &pcbinfo->lasthi;
362 } else if (inp->inp_flags & INP_LOWPORT) {
364 (error = suser_cred(p->p_ucred, PRISON_ROOT))) {
365 inp->inp_laddr.s_addr = INADDR_ANY;
368 first = ipport_lowfirstauto; /* 1023 */
369 last = ipport_lowlastauto; /* 600 */
370 lastport = &pcbinfo->lastlow;
372 first = ipport_firstauto; /* sysctl */
373 last = ipport_lastauto;
374 lastport = &pcbinfo->lastport;
377 * Simple check to ensure all ports are not used up causing
380 * We split the two cases (up and down) so that the direction
381 * is not being tested on each round of the loop.
387 count = first - last;
390 if (count-- < 0) { /* completely used? */
391 inp->inp_laddr.s_addr = INADDR_ANY;
392 return (EADDRNOTAVAIL);
395 if (*lastport > first || *lastport < last)
397 lport = htons(*lastport);
398 } while (in_pcblookup_local(pcbinfo,
399 inp->inp_laddr, lport, wild));
404 count = last - first;
407 if (count-- < 0) { /* completely used? */
408 inp->inp_laddr.s_addr = INADDR_ANY;
409 return (EADDRNOTAVAIL);
412 if (*lastport < first || *lastport > last)
414 lport = htons(*lastport);
415 } while (in_pcblookup_local(pcbinfo,
416 inp->inp_laddr, lport, wild));
419 inp->inp_lport = lport;
420 if (prison_ip(td, 0, &inp->inp_laddr.s_addr)) {
421 inp->inp_laddr.s_addr = INADDR_ANY;
425 if (in_pcbinsporthash(inp) != 0) {
426 inp->inp_laddr.s_addr = INADDR_ANY;
434 * Transform old in_pcbconnect() into an inner subroutine for new
435 * in_pcbconnect(): Do some validity-checking on the remote
436 * address (in mbuf 'nam') and then determine local host address
437 * (i.e., which interface) to use to access that remote host.
439 * This preserves definition of in_pcbconnect(), while supporting a
440 * slightly different version for T/TCP. (This is more than
441 * a bit of a kludge, but cleaning up the internal interfaces would
442 * have forced minor changes in every protocol).
445 in_pcbladdr(inp, nam, plocal_sin)
447 struct sockaddr *nam;
448 struct sockaddr_in **plocal_sin;
450 struct in_ifaddr *ia;
451 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
453 if (nam->sa_len != sizeof *sin)
455 if (sin->sin_family != AF_INET)
456 return (EAFNOSUPPORT);
457 if (sin->sin_port == 0)
458 return (EADDRNOTAVAIL);
459 if (!TAILQ_EMPTY(&in_ifaddrhead)) {
460 ia = TAILQ_FIRST(&in_ifaddrhead);
462 * If the destination address is INADDR_ANY,
463 * use the primary local address.
464 * If the supplied address is INADDR_BROADCAST,
465 * and the primary interface supports broadcast,
466 * choose the broadcast address for that interface.
468 if (sin->sin_addr.s_addr == INADDR_ANY)
469 sin->sin_addr = IA_SIN(ia)->sin_addr;
470 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
471 (ia->ia_ifp->if_flags & IFF_BROADCAST))
472 sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr;
474 if (inp->inp_laddr.s_addr == INADDR_ANY) {
477 ia = (struct in_ifaddr *)NULL;
479 * If route is known or can be allocated now,
480 * our src addr is taken from the i/f, else punt.
481 * Note that we should check the address family of the cached
482 * destination, in case of sharing the cache with IPv6.
484 ro = &inp->inp_route;
486 (!(ro->ro_rt->rt_flags & RTF_UP) ||
487 ro->ro_dst.sa_family != AF_INET ||
488 satosin(&ro->ro_dst)->sin_addr.s_addr !=
489 sin->sin_addr.s_addr ||
490 inp->inp_socket->so_options & SO_DONTROUTE)) {
492 ro->ro_rt = (struct rtentry *)NULL;
494 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/
495 (ro->ro_rt == (struct rtentry *)NULL ||
496 ro->ro_rt->rt_ifp == (struct ifnet *)NULL)) {
497 /* No route yet, so try to acquire one */
498 bzero(&ro->ro_dst, sizeof(struct sockaddr_in));
499 ro->ro_dst.sa_family = AF_INET;
500 ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
501 ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
506 * If we found a route, use the address
507 * corresponding to the outgoing interface
508 * unless it is the loopback (in case a route
509 * to our address on another net goes to loopback).
511 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK))
512 ia = ifatoia(ro->ro_rt->rt_ifa);
514 u_short fport = sin->sin_port;
517 ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
519 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
520 sin->sin_port = fport;
522 ia = TAILQ_FIRST(&in_ifaddrhead);
524 return (EADDRNOTAVAIL);
527 * If the destination address is multicast and an outgoing
528 * interface has been set as a multicast option, use the
529 * address of that interface as our source address.
531 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
532 inp->inp_moptions != NULL) {
533 struct ip_moptions *imo;
536 imo = inp->inp_moptions;
537 if (imo->imo_multicast_ifp != NULL) {
538 ifp = imo->imo_multicast_ifp;
539 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
540 if (ia->ia_ifp == ifp)
543 return (EADDRNOTAVAIL);
547 * Don't do pcblookup call here; return interface in plocal_sin
548 * and exit to caller, that will do the lookup.
550 *plocal_sin = &ia->ia_addr;
558 * Connect from a socket to a specified address.
559 * Both address and port must be specified in argument sin.
560 * If don't have a local address for this socket yet,
564 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
566 struct sockaddr_in *if_sin;
567 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
568 struct sockaddr_in sa;
569 struct ucred *cr = td->td_proc ? td->td_proc->p_ucred : NULL;
572 if (cr && cr->cr_prison != NULL && in_nullhost(inp->inp_laddr)) {
573 bzero(&sa, sizeof sa);
574 sa.sin_addr.s_addr = htonl(cr->cr_prison->pr_ip);
575 sa.sin_len = sizeof sa;
576 sa.sin_family = AF_INET;
577 error = in_pcbbind(inp, (struct sockaddr *)&sa, td);
582 /* Call inner routine to assign local interface address. */
583 if ((error = in_pcbladdr(inp, nam, &if_sin)) != 0)
586 if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port,
587 inp->inp_laddr.s_addr ? inp->inp_laddr : if_sin->sin_addr,
588 inp->inp_lport, FALSE, NULL) != NULL) {
591 if (inp->inp_laddr.s_addr == INADDR_ANY) {
592 if (inp->inp_lport == 0) {
593 error = in_pcbbind(inp, (struct sockaddr *)NULL, td);
597 inp->inp_laddr = if_sin->sin_addr;
599 inp->inp_faddr = sin->sin_addr;
600 inp->inp_fport = sin->sin_port;
601 in_pcbinsconnhash(inp);
606 in_pcbdisconnect(inp)
610 inp->inp_faddr.s_addr = INADDR_ANY;
612 in_pcbremconnhash(inp);
613 if (inp->inp_socket->so_state & SS_NOFDREF)
621 struct socket *so = inp->inp_socket;
622 struct inpcbinfo *ipi = inp->inp_pcbinfo;
625 ipsec4_delete_pcbpolicy(inp);
627 inp->inp_gencnt = ++ipi->ipi_gencnt;
631 if (inp->inp_options)
632 m_free(inp->inp_options);
633 if (inp->inp_route.ro_rt)
634 rtfree(inp->inp_route.ro_rt);
635 ip_freemoptions(inp->inp_moptions);
637 zfree(ipi->ipi_zone, inp);
641 * The calling convention of in_setsockaddr() and in_setpeeraddr() was
642 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
643 * in struct pr_usrreqs, so that protocols can just reference then directly
644 * without the need for a wrapper function. The socket must have a valid
645 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
646 * except through a kernel programming error, so it is acceptable to panic
647 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
648 * because there actually /is/ a programming error somewhere... XXX)
651 in_setsockaddr(so, nam)
653 struct sockaddr **nam;
656 struct sockaddr_in *sin;
659 * Do the malloc first in case it blocks.
661 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
663 sin->sin_family = AF_INET;
664 sin->sin_len = sizeof *sin;
673 sin->sin_port = inp->inp_lport;
674 sin->sin_addr = inp->inp_laddr;
677 *nam = (struct sockaddr *)sin;
682 in_setpeeraddr(so, nam)
684 struct sockaddr **nam;
687 struct sockaddr_in *sin;
690 * Do the malloc first in case it blocks.
692 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
694 sin->sin_family = AF_INET;
695 sin->sin_len = sizeof *sin;
704 sin->sin_port = inp->inp_fport;
705 sin->sin_addr = inp->inp_faddr;
708 *nam = (struct sockaddr *)sin;
713 in_pcbnotifyall(head, faddr, errno, notify)
714 struct inpcbhead *head;
715 struct in_addr faddr;
716 void (*notify) (struct inpcb *, int);
718 struct inpcb *inp, *ninp;
721 * note: if INP_PLACEMARKER is set we must ignore the rest of
722 * the structure and skip it.
725 LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) {
726 if (inp->inp_flags & INP_PLACEMARKER)
729 if (!(inp->inp_vflag & INP_IPV4))
732 if (inp->inp_faddr.s_addr != faddr.s_addr ||
733 inp->inp_socket == NULL)
735 (*notify)(inp, errno); /* can remove inp from list! */
741 in_pcbpurgeif0(head, ifp)
746 struct ip_moptions *imo;
749 for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
750 if (inp->inp_flags & INP_PLACEMARKER)
752 imo = inp->inp_moptions;
753 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) {
755 * Unselect the outgoing interface if it is being
758 if (imo->imo_multicast_ifp == ifp)
759 imo->imo_multicast_ifp = NULL;
762 * Drop multicast group membership if we joined
763 * through the interface being detached.
765 for (i = 0, gap = 0; i < imo->imo_num_memberships;
767 if (imo->imo_membership[i]->inm_ifp == ifp) {
768 in_delmulti(imo->imo_membership[i]);
771 imo->imo_membership[i - gap] =
772 imo->imo_membership[i];
774 imo->imo_num_memberships -= gap;
780 * Check for alternatives when higher level complains
781 * about service problems. For now, invalidate cached
782 * routing information. If the route was created dynamically
783 * (by a redirect), time to try a default gateway again.
786 in_losing(struct inpcb *inp)
789 struct rt_addrinfo rtinfo;
791 if ((rt = inp->inp_route.ro_rt)) {
792 bzero(&rtinfo, sizeof(struct rt_addrinfo));
793 rtinfo.rti_info[RTAX_DST] = rt_key(rt);
794 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
795 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt);
796 rtinfo.rti_flags = rt->rt_flags;
797 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0);
798 if (rt->rt_flags & RTF_DYNAMIC)
799 rtrequest1(RTM_DELETE, &rtinfo, NULL);
800 inp->inp_route.ro_rt = NULL;
803 * A new route can be allocated
804 * the next time output is attempted.
810 * After a routing change, flush old routing
811 * and allocate a (hopefully) better one.
814 in_rtchange(inp, errno)
818 if (inp->inp_route.ro_rt) {
819 rtfree(inp->inp_route.ro_rt);
820 inp->inp_route.ro_rt = NULL;
822 * A new route can be allocated the next time
823 * output is attempted.
829 * Lookup a PCB based on the local address and port.
832 in_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
833 struct inpcbinfo *pcbinfo;
834 struct in_addr laddr;
839 int matchwild = 3, wildcard;
840 u_short lport = lport_arg;
842 struct inpcbporthead *porthash;
843 struct inpcbport *phd;
844 struct inpcb *match = NULL;
847 * Best fit PCB lookup.
849 * First see if this local port is in use by looking on the
852 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
853 pcbinfo->porthashmask)];
854 LIST_FOREACH(phd, porthash, phd_hash) {
855 if (phd->phd_port == lport)
860 * Port is in use by one or more PCBs. Look for best
863 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
866 if ((inp->inp_vflag & INP_IPV4) == 0)
869 if (inp->inp_faddr.s_addr != INADDR_ANY)
871 if (inp->inp_laddr.s_addr != INADDR_ANY) {
872 if (laddr.s_addr == INADDR_ANY)
874 else if (inp->inp_laddr.s_addr != laddr.s_addr)
877 if (laddr.s_addr != INADDR_ANY)
880 if (wildcard && !wild_okay)
882 if (wildcard < matchwild) {
884 matchwild = wildcard;
885 if (matchwild == 0) {
895 * Lookup PCB in hash list.
898 in_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
899 struct inpcbinfo *pcbinfo;
900 struct in_addr faddr, laddr;
901 u_int fport_arg, lport_arg;
905 struct inpcbhead *head;
907 u_short fport = fport_arg, lport = lport_arg;
910 * First look for an exact match.
912 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport,
913 laddr.s_addr, lport, pcbinfo->hashmask)];
914 LIST_FOREACH(inp, head, inp_hash) {
916 if (!(inp->inp_vflag & INP_IPV4))
919 if (in_hosteq(inp->inp_faddr, faddr) &&
920 in_hosteq(inp->inp_laddr, laddr) &&
921 inp->inp_fport == fport && inp->inp_lport == lport) {
928 struct inpcb *local_wild = NULL;
930 struct inpcb *local_wild_mapped = NULL;
932 struct inpcontainer *ic;
933 struct inpcontainerhead *chead;
935 chead = &pcbinfo->wildcardhashbase[
936 INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)];
937 LIST_FOREACH(ic, chead, ic_list) {
940 if (!(inp->inp_vflag & INP_IPV4))
943 if (inp->inp_lport == lport) {
944 if (ifp && ifp->if_type == IFT_FAITH &&
945 !(inp->inp_flags & INP_FAITH))
947 if (inp->inp_laddr.s_addr == laddr.s_addr)
949 if (inp->inp_laddr.s_addr == INADDR_ANY) {
951 if (INP_CHECK_SOCKAF(inp->inp_socket,
953 local_wild_mapped = inp;
961 if (local_wild == NULL)
962 return (local_wild_mapped);
974 * Insert PCB into connection hash table.
977 in_pcbinsconnhash(struct inpcb *inp)
979 struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo;
980 struct inpcbhead *bucket;
981 u_int32_t hashkey_faddr, hashkey_laddr;
984 if (inp->inp_vflag & INP_IPV6) {
985 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */;
986 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */;
989 hashkey_faddr = inp->inp_faddr.s_addr;
990 hashkey_laddr = inp->inp_laddr.s_addr;
995 KASSERT(!(inp->inp_flags & INP_CONNECTED), ("already on hash list"));
996 inp->inp_flags |= INP_CONNECTED;
999 * Insert into the connection hash table.
1001 bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr,
1002 inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)];
1003 LIST_INSERT_HEAD(bucket, inp, inp_hash);
1007 * Remove PCB from connection hash table.
1010 in_pcbremconnhash(struct inpcb *inp)
1012 KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected"));
1013 LIST_REMOVE(inp, inp_hash);
1014 inp->inp_flags &= ~INP_CONNECTED;
1018 * Insert PCB into port hash table.
1021 in_pcbinsporthash(struct inpcb *inp)
1023 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1024 struct inpcbporthead *pcbporthash;
1025 struct inpcbport *phd;
1028 * Insert into the port hash table.
1030 pcbporthash = &pcbinfo->porthashbase[
1031 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)];
1033 /* Go through port list and look for a head for this lport. */
1034 LIST_FOREACH(phd, pcbporthash, phd_hash)
1035 if (phd->phd_port == inp->inp_lport)
1038 /* If none exists, malloc one and tack it on. */
1040 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport),
1041 M_PCB, M_INTWAIT | M_NULLOK);
1043 return (ENOBUFS); /* XXX */
1044 phd->phd_port = inp->inp_lport;
1045 LIST_INIT(&phd->phd_pcblist);
1046 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1050 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1056 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1058 struct inpcontainer *ic;
1059 struct inpcontainerhead *bucket;
1061 bucket = &pcbinfo->wildcardhashbase[
1062 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1064 ic = malloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT);
1066 LIST_INSERT_HEAD(bucket, ic, ic_list);
1070 * Insert PCB into wildcard hash table.
1073 in_pcbinswildcardhash(struct inpcb *inp)
1075 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1077 KKASSERT(pcbinfo != NULL);
1079 in_pcbinswildcardhash_oncpu(inp, pcbinfo);
1080 inp->inp_flags |= INP_WILDCARD;
1084 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1086 struct inpcontainer *ic;
1087 struct inpcontainerhead *head;
1090 head = &pcbinfo->wildcardhashbase[
1091 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1093 LIST_FOREACH(ic, head, ic_list) {
1094 if (ic->ic_inp == inp)
1097 return; /* not found! */
1100 LIST_REMOVE(ic, ic_list); /* remove container from bucket chain */
1101 free(ic, M_TEMP); /* deallocate container */
1105 * Remove PCB from wildcard hash table.
1108 in_pcbremwildcardhash(struct inpcb *inp)
1110 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1112 KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard"));
1113 in_pcbremwildcardhash_oncpu(inp, pcbinfo);
1114 inp->inp_flags &= ~INP_WILDCARD;
1118 * Remove PCB from various lists.
1124 if (inp->inp_lport) {
1125 struct inpcbport *phd = inp->inp_phd;
1127 LIST_REMOVE(inp, inp_portlist);
1128 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1129 LIST_REMOVE(phd, phd_hash);
1133 if (inp->inp_flags & INP_WILDCARD) {
1134 in_pcbremwildcardhash(inp);
1135 } else if (inp->inp_flags & INP_CONNECTED) {
1136 in_pcbremconnhash(inp);
1138 LIST_REMOVE(inp, inp_list);
1139 inp->inp_pcbinfo->ipi_count--;
1143 prison_xinpcb(struct thread *td, struct inpcb *inp)
1147 if (td->td_proc == NULL)
1149 cr = td->td_proc->p_ucred;
1150 if (cr->cr_prison == NULL)
1152 if (ntohl(inp->inp_laddr.s_addr) == cr->cr_prison->pr_ip)
1158 in_pcblist_global(SYSCTL_HANDLER_ARGS)
1160 struct inpcbinfo *pcbinfo = arg1;
1161 struct inpcb *inp, *marker;
1167 * The process of preparing the TCB list is too time-consuming and
1168 * resource-intensive to repeat twice on every request.
1170 if (req->oldptr == NULL) {
1171 n = pcbinfo->ipi_count;
1172 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb);
1176 if (req->newptr != NULL)
1180 * OK, now we're committed to doing something. Re-fetch ipi_count
1181 * after obtaining the generation count.
1183 gencnt = pcbinfo->ipi_gencnt;
1184 n = pcbinfo->ipi_count;
1186 marker = malloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO);
1187 marker->inp_flags |= INP_PLACEMARKER;
1188 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
1193 while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) {
1194 LIST_REMOVE(marker, inp_list);
1195 LIST_INSERT_AFTER(inp, marker, inp_list);
1197 if (inp->inp_flags & INP_PLACEMARKER)
1199 if (inp->inp_gencnt > gencnt)
1201 if (prison_xinpcb(req->td, inp))
1203 bzero(&xi, sizeof xi);
1204 xi.xi_len = sizeof xi;
1205 bcopy(inp, &xi.xi_inp, sizeof *inp);
1206 if (inp->inp_socket)
1207 sotoxsocket(inp->inp_socket, &xi.xi_socket);
1208 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0)
1212 LIST_REMOVE(marker, inp_list);
1213 if (error == 0 && i < n) {
1214 bzero(&xi, sizeof xi);
1215 xi.xi_len = sizeof xi;
1217 error = SYSCTL_OUT(req, &xi, sizeof xi);
1221 free(marker, M_TEMP);