2 * Copyright (c) 1982, 1986, 1991, 1993, 1995
3 * The Regents of the University of California.
4 * Copyright (c) 2007 Robert N. M. Watson
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 4. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
38 #include "opt_ipsec.h"
39 #include "opt_inet6.h"
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/malloc.h>
46 #include <sys/domain.h>
47 #include <sys/protosw.h>
48 #include <sys/socket.h>
49 #include <sys/socketvar.h>
53 #include <sys/kernel.h>
54 #include <sys/sysctl.h>
63 #include <net/if_types.h>
64 #include <net/route.h>
66 #include <netinet/in.h>
67 #include <netinet/in_pcb.h>
68 #include <netinet/in_var.h>
69 #include <netinet/ip_var.h>
70 #include <netinet/tcp_var.h>
71 #include <netinet/udp.h>
72 #include <netinet/udp_var.h>
74 #include <netinet/ip6.h>
75 #include <netinet6/ip6_var.h>
80 #include <netipsec/ipsec.h>
81 #include <netipsec/key.h>
84 #include <security/mac/mac_framework.h>
87 * These configure the range of local port addresses assigned to
88 * "unspecified" outgoing connections/packets/whatever.
90 int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */
91 int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */
92 int ipport_firstauto = IPPORT_EPHEMERALFIRST; /* 10000 */
93 int ipport_lastauto = IPPORT_EPHEMERALLAST; /* 65535 */
94 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
95 int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */
98 * Reserved ports accessible only to root. There are significant
99 * security considerations that must be accounted for when changing these,
100 * but the security benefits can be great. Please be careful.
102 int ipport_reservedhigh = IPPORT_RESERVED - 1; /* 1023 */
103 int ipport_reservedlow = 0;
105 /* Variables dealing with random ephemeral port allocation. */
106 int ipport_randomized = 1; /* user controlled via sysctl */
107 int ipport_randomcps = 10; /* user controlled via sysctl */
108 int ipport_randomtime = 45; /* user controlled via sysctl */
109 int ipport_stoprandom = 0; /* toggled by ipport_tick */
110 int ipport_tcpallocs;
111 int ipport_tcplastcount;
113 #define RANGECHK(var, min, max) \
114 if ((var) < (min)) { (var) = (min); } \
115 else if ((var) > (max)) { (var) = (max); }
118 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
122 error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
124 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
125 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
126 RANGECHK(ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX);
127 RANGECHK(ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX);
128 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX);
129 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX);
136 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
138 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
139 &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
140 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
141 &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
142 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
143 &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
144 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
145 &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
146 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
147 &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
148 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
149 &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
150 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedhigh,
151 CTLFLAG_RW|CTLFLAG_SECURE, &ipport_reservedhigh, 0, "");
152 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedlow,
153 CTLFLAG_RW|CTLFLAG_SECURE, &ipport_reservedlow, 0, "");
154 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomized, CTLFLAG_RW,
155 &ipport_randomized, 0, "Enable random port allocation");
156 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomcps, CTLFLAG_RW,
157 &ipport_randomcps, 0, "Maximum number of random port "
158 "allocations before switching to a sequental one");
159 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomtime, CTLFLAG_RW,
160 &ipport_randomtime, 0, "Minimum time to keep sequental port "
161 "allocation before switching to a random one");
164 * in_pcb.c: manage the Protocol Control Blocks.
166 * NOTE: It is assumed that most of these functions will be called with
167 * the pcbinfo lock held, and often, the inpcb lock held, as these utility
168 * functions often modify hash chains or addresses in pcbs.
172 * Allocate a PCB and associate it with the socket.
173 * On success return with the PCB locked.
176 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
181 INP_INFO_WLOCK_ASSERT(pcbinfo);
183 inp = uma_zalloc(pcbinfo->ipi_zone, M_NOWAIT);
186 bzero(inp, inp_zero_size);
187 inp->inp_pcbinfo = pcbinfo;
188 inp->inp_socket = so;
189 inp->inp_inc.inc_fibnum = so->so_fibnum;
191 error = mac_inpcb_init(inp, M_NOWAIT);
195 mac_inpcb_create(so, inp);
200 error = ipsec_init_policy(so, &inp->inp_sp);
203 mac_inpcb_destroy(inp);
209 if (INP_SOCKAF(so) == AF_INET6) {
210 inp->inp_vflag |= INP_IPV6PROTO;
212 inp->inp_flags |= IN6P_IPV6_V6ONLY;
215 LIST_INSERT_HEAD(pcbinfo->ipi_listhead, inp, inp_list);
216 pcbinfo->ipi_count++;
217 so->so_pcb = (caddr_t)inp;
219 if (ip6_auto_flowlabel)
220 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
223 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
225 #if defined(IPSEC) || defined(MAC)
228 uma_zfree(pcbinfo->ipi_zone, inp);
234 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
238 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
239 INP_WLOCK_ASSERT(inp);
241 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
243 anonport = inp->inp_lport == 0 && (nam == NULL ||
244 ((struct sockaddr_in *)nam)->sin_port == 0);
245 error = in_pcbbind_setup(inp, nam, &inp->inp_laddr.s_addr,
246 &inp->inp_lport, cred);
249 if (in_pcbinshash(inp) != 0) {
250 inp->inp_laddr.s_addr = INADDR_ANY;
255 inp->inp_flags |= INP_ANONPORT;
260 * Set up a bind operation on a PCB, performing port allocation
261 * as required, but do not actually modify the PCB. Callers can
262 * either complete the bind by setting inp_laddr/inp_lport and
263 * calling in_pcbinshash(), or they can just use the resulting
264 * port and address to authorise the sending of a once-off packet.
266 * On error, the values of *laddrp and *lportp are not changed.
269 in_pcbbind_setup(struct inpcb *inp, struct sockaddr *nam, in_addr_t *laddrp,
270 u_short *lportp, struct ucred *cred)
272 struct socket *so = inp->inp_socket;
273 unsigned short *lastport;
274 struct sockaddr_in *sin;
275 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
276 struct in_addr laddr;
278 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
279 int error, prison = 0;
283 * Because no actual state changes occur here, a write global write
284 * lock on the pcbinfo isn't required.
286 INP_INFO_LOCK_ASSERT(pcbinfo);
287 INP_LOCK_ASSERT(inp);
289 if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */
290 return (EADDRNOTAVAIL);
291 laddr.s_addr = *laddrp;
292 if (nam != NULL && laddr.s_addr != INADDR_ANY)
294 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
295 wild = INPLOOKUP_WILDCARD;
297 sin = (struct sockaddr_in *)nam;
298 if (nam->sa_len != sizeof (*sin))
302 * We should check the family, but old programs
303 * incorrectly fail to initialize it.
305 if (sin->sin_family != AF_INET)
306 return (EAFNOSUPPORT);
308 if (sin->sin_addr.s_addr != INADDR_ANY)
309 if (prison_ip(cred, 0, &sin->sin_addr.s_addr))
311 if (sin->sin_port != *lportp) {
312 /* Don't allow the port to change. */
315 lport = sin->sin_port;
317 /* NB: lport is left as 0 if the port isn't being changed. */
318 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
320 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
321 * allow complete duplication of binding if
322 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
323 * and a multicast address is bound on both
324 * new and duplicated sockets.
326 if (so->so_options & SO_REUSEADDR)
327 reuseport = SO_REUSEADDR|SO_REUSEPORT;
328 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
329 sin->sin_port = 0; /* yech... */
330 bzero(&sin->sin_zero, sizeof(sin->sin_zero));
331 if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
332 return (EADDRNOTAVAIL);
334 laddr = sin->sin_addr;
340 if (ntohs(lport) <= ipport_reservedhigh &&
341 ntohs(lport) >= ipport_reservedlow &&
342 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
347 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
348 priv_check_cred(so->so_cred,
349 PRIV_NETINET_REUSEPORT, 0) != 0) {
350 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
351 lport, prison ? 0 : INPLOOKUP_WILDCARD,
355 * This entire block sorely needs a rewrite.
358 ((t->inp_vflag & INP_TIMEWAIT) == 0) &&
359 (so->so_type != SOCK_STREAM ||
360 ntohl(t->inp_faddr.s_addr) == INADDR_ANY) &&
361 (ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
362 ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
363 (t->inp_socket->so_options &
364 SO_REUSEPORT) == 0) &&
365 (so->so_cred->cr_uid !=
366 t->inp_socket->so_cred->cr_uid))
369 if (prison && prison_ip(cred, 0, &sin->sin_addr.s_addr))
370 return (EADDRNOTAVAIL);
371 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
372 lport, prison ? 0 : wild, cred);
373 if (t && (t->inp_vflag & INP_TIMEWAIT)) {
375 * XXXRW: If an incpb has had its timewait
376 * state recycled, we treat the address as
377 * being in use (for now). This is better
378 * than a panic, but not desirable.
382 (reuseport & tw->tw_so_options) == 0)
385 (reuseport & t->inp_socket->so_options) == 0) {
387 if (ntohl(sin->sin_addr.s_addr) !=
389 ntohl(t->inp_laddr.s_addr) !=
392 INP_SOCKAF(t->inp_socket))
401 u_short first, last, aux;
404 if (laddr.s_addr != INADDR_ANY)
405 if (prison_ip(cred, 0, &laddr.s_addr))
408 if (inp->inp_flags & INP_HIGHPORT) {
409 first = ipport_hifirstauto; /* sysctl */
410 last = ipport_hilastauto;
411 lastport = &pcbinfo->ipi_lasthi;
412 } else if (inp->inp_flags & INP_LOWPORT) {
413 error = priv_check_cred(cred,
414 PRIV_NETINET_RESERVEDPORT, 0);
417 first = ipport_lowfirstauto; /* 1023 */
418 last = ipport_lowlastauto; /* 600 */
419 lastport = &pcbinfo->ipi_lastlow;
421 first = ipport_firstauto; /* sysctl */
422 last = ipport_lastauto;
423 lastport = &pcbinfo->ipi_lastport;
426 * For UDP, use random port allocation as long as the user
427 * allows it. For TCP (and as of yet unknown) connections,
428 * use random port allocation only if the user allows it AND
429 * ipport_tick() allows it.
431 if (ipport_randomized &&
432 (!ipport_stoprandom || pcbinfo == &udbinfo))
437 * It makes no sense to do random port allocation if
438 * we have the only port available.
442 /* Make sure to not include UDP packets in the count. */
443 if (pcbinfo != &udbinfo)
446 * Simple check to ensure all ports are not used up causing
457 (arc4random() % (last - first));
459 count = last - first;
462 if (count-- < 0) /* completely used? */
463 return (EADDRNOTAVAIL);
465 if (*lastport < first || *lastport > last)
467 lport = htons(*lastport);
468 } while (in_pcblookup_local(pcbinfo, laddr,
471 if (prison_ip(cred, 0, &laddr.s_addr))
473 *laddrp = laddr.s_addr;
479 * Connect from a socket to a specified address.
480 * Both address and port must be specified in argument sin.
481 * If don't have a local address for this socket yet,
485 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
487 u_short lport, fport;
488 in_addr_t laddr, faddr;
491 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
492 INP_WLOCK_ASSERT(inp);
494 lport = inp->inp_lport;
495 laddr = inp->inp_laddr.s_addr;
496 anonport = (lport == 0);
497 error = in_pcbconnect_setup(inp, nam, &laddr, &lport, &faddr, &fport,
502 /* Do the initial binding of the local address if required. */
503 if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) {
504 inp->inp_lport = lport;
505 inp->inp_laddr.s_addr = laddr;
506 if (in_pcbinshash(inp) != 0) {
507 inp->inp_laddr.s_addr = INADDR_ANY;
513 /* Commit the remaining changes. */
514 inp->inp_lport = lport;
515 inp->inp_laddr.s_addr = laddr;
516 inp->inp_faddr.s_addr = faddr;
517 inp->inp_fport = fport;
521 inp->inp_flags |= INP_ANONPORT;
526 * Set up for a connect from a socket to the specified address.
527 * On entry, *laddrp and *lportp should contain the current local
528 * address and port for the PCB; these are updated to the values
529 * that should be placed in inp_laddr and inp_lport to complete
532 * On success, *faddrp and *fportp will be set to the remote address
533 * and port. These are not updated in the error case.
535 * If the operation fails because the connection already exists,
536 * *oinpp will be set to the PCB of that connection so that the
537 * caller can decide to override it. In all other cases, *oinpp
541 in_pcbconnect_setup(struct inpcb *inp, struct sockaddr *nam,
542 in_addr_t *laddrp, u_short *lportp, in_addr_t *faddrp, u_short *fportp,
543 struct inpcb **oinpp, struct ucred *cred)
545 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
546 struct in_ifaddr *ia;
547 struct sockaddr_in sa;
548 struct ucred *socred;
550 struct in_addr laddr, faddr;
551 u_short lport, fport;
555 * Because a global state change doesn't actually occur here, a read
556 * lock is sufficient.
558 INP_INFO_LOCK_ASSERT(inp->inp_pcbinfo);
559 INP_LOCK_ASSERT(inp);
563 if (nam->sa_len != sizeof (*sin))
565 if (sin->sin_family != AF_INET)
566 return (EAFNOSUPPORT);
567 if (sin->sin_port == 0)
568 return (EADDRNOTAVAIL);
569 laddr.s_addr = *laddrp;
571 faddr = sin->sin_addr;
572 fport = sin->sin_port;
573 socred = inp->inp_socket->so_cred;
574 if (laddr.s_addr == INADDR_ANY && jailed(socred)) {
575 bzero(&sa, sizeof(sa));
576 sa.sin_addr.s_addr = htonl(prison_getip(socred));
577 sa.sin_len = sizeof(sa);
578 sa.sin_family = AF_INET;
579 error = in_pcbbind_setup(inp, (struct sockaddr *)&sa,
580 &laddr.s_addr, &lport, cred);
584 if (!TAILQ_EMPTY(&in_ifaddrhead)) {
586 * If the destination address is INADDR_ANY,
587 * use the primary local address.
588 * If the supplied address is INADDR_BROADCAST,
589 * and the primary interface supports broadcast,
590 * choose the broadcast address for that interface.
592 if (faddr.s_addr == INADDR_ANY)
593 faddr = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr;
594 else if (faddr.s_addr == (u_long)INADDR_BROADCAST &&
595 (TAILQ_FIRST(&in_ifaddrhead)->ia_ifp->if_flags &
597 faddr = satosin(&TAILQ_FIRST(
598 &in_ifaddrhead)->ia_broadaddr)->sin_addr;
600 if (laddr.s_addr == INADDR_ANY) {
603 * If route is known our src addr is taken from the i/f,
606 * Find out route to destination
608 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0)
609 ia = ip_rtaddr(faddr, inp->inp_inc.inc_fibnum);
611 * If we found a route, use the address corresponding to
612 * the outgoing interface.
614 * Otherwise assume faddr is reachable on a directly connected
615 * network and try to find a corresponding interface to take
616 * the source address from.
619 bzero(&sa, sizeof(sa));
621 sa.sin_len = sizeof(sa);
622 sa.sin_family = AF_INET;
624 ia = ifatoia(ifa_ifwithdstaddr(sintosa(&sa)));
626 ia = ifatoia(ifa_ifwithnet(sintosa(&sa)));
628 return (ENETUNREACH);
631 * If the destination address is multicast and an outgoing
632 * interface has been set as a multicast option, use the
633 * address of that interface as our source address.
635 if (IN_MULTICAST(ntohl(faddr.s_addr)) &&
636 inp->inp_moptions != NULL) {
637 struct ip_moptions *imo;
640 imo = inp->inp_moptions;
641 if (imo->imo_multicast_ifp != NULL) {
642 ifp = imo->imo_multicast_ifp;
643 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
644 if (ia->ia_ifp == ifp)
647 return (EADDRNOTAVAIL);
650 laddr = ia->ia_addr.sin_addr;
653 oinp = in_pcblookup_hash(inp->inp_pcbinfo, faddr, fport, laddr, lport,
661 error = in_pcbbind_setup(inp, NULL, &laddr.s_addr, &lport,
666 *laddrp = laddr.s_addr;
668 *faddrp = faddr.s_addr;
674 in_pcbdisconnect(struct inpcb *inp)
677 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
678 INP_WLOCK_ASSERT(inp);
680 inp->inp_faddr.s_addr = INADDR_ANY;
686 * In the old world order, in_pcbdetach() served two functions: to detach the
687 * pcb from the socket/potentially free the socket, and to free the pcb
688 * itself. In the new world order, the protocol code is responsible for
689 * managing the relationship with the socket, and this code simply frees the
693 in_pcbdetach(struct inpcb *inp)
696 KASSERT(inp->inp_socket != NULL, ("in_pcbdetach: inp_socket == NULL"));
697 inp->inp_socket->so_pcb = NULL;
698 inp->inp_socket = NULL;
702 in_pcbfree(struct inpcb *inp)
704 struct inpcbinfo *ipi = inp->inp_pcbinfo;
706 KASSERT(inp->inp_socket == NULL, ("in_pcbfree: inp_socket != NULL"));
708 INP_INFO_WLOCK_ASSERT(ipi);
709 INP_WLOCK_ASSERT(inp);
712 ipsec4_delete_pcbpolicy(inp);
714 inp->inp_gencnt = ++ipi->ipi_gencnt;
716 if (inp->inp_options)
717 (void)m_free(inp->inp_options);
718 if (inp->inp_moptions != NULL)
719 inp_freemoptions(inp->inp_moptions);
723 mac_inpcb_destroy(inp);
726 uma_zfree(ipi->ipi_zone, inp);
730 * TCP needs to maintain its inpcb structure after the TCP connection has
731 * been torn down. However, it must be disconnected from the inpcb hashes as
732 * it must not prevent binding of future connections to the same port/ip
733 * combination by other inpcbs.
736 in_pcbdrop(struct inpcb *inp)
739 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
740 INP_WLOCK_ASSERT(inp);
742 inp->inp_vflag |= INP_DROPPED;
743 if (inp->inp_lport) {
744 struct inpcbport *phd = inp->inp_phd;
746 LIST_REMOVE(inp, inp_hash);
747 LIST_REMOVE(inp, inp_portlist);
748 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
749 LIST_REMOVE(phd, phd_hash);
757 * Common routines to return the socket addresses associated with inpcbs.
760 in_sockaddr(in_port_t port, struct in_addr *addr_p)
762 struct sockaddr_in *sin;
764 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
766 sin->sin_family = AF_INET;
767 sin->sin_len = sizeof(*sin);
768 sin->sin_addr = *addr_p;
769 sin->sin_port = port;
771 return (struct sockaddr *)sin;
775 in_getsockaddr(struct socket *so, struct sockaddr **nam)
782 KASSERT(inp != NULL, ("in_getsockaddr: inp == NULL"));
785 port = inp->inp_lport;
786 addr = inp->inp_laddr;
789 *nam = in_sockaddr(port, &addr);
794 in_getpeeraddr(struct socket *so, struct sockaddr **nam)
801 KASSERT(inp != NULL, ("in_getpeeraddr: inp == NULL"));
804 port = inp->inp_fport;
805 addr = inp->inp_faddr;
808 *nam = in_sockaddr(port, &addr);
813 in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr faddr, int errno,
814 struct inpcb *(*notify)(struct inpcb *, int))
816 struct inpcb *inp, *inp_temp;
818 INP_INFO_WLOCK(pcbinfo);
819 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
822 if ((inp->inp_vflag & INP_IPV4) == 0) {
827 if (inp->inp_faddr.s_addr != faddr.s_addr ||
828 inp->inp_socket == NULL) {
832 if ((*notify)(inp, errno))
835 INP_INFO_WUNLOCK(pcbinfo);
839 in_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
842 struct ip_moptions *imo;
845 INP_INFO_RLOCK(pcbinfo);
846 LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) {
848 imo = inp->inp_moptions;
849 if ((inp->inp_vflag & INP_IPV4) &&
852 * Unselect the outgoing interface if it is being
855 if (imo->imo_multicast_ifp == ifp)
856 imo->imo_multicast_ifp = NULL;
859 * Drop multicast group membership if we joined
860 * through the interface being detached.
862 for (i = 0, gap = 0; i < imo->imo_num_memberships;
864 if (imo->imo_membership[i]->inm_ifp == ifp) {
865 in_delmulti(imo->imo_membership[i]);
868 imo->imo_membership[i - gap] =
869 imo->imo_membership[i];
871 imo->imo_num_memberships -= gap;
875 INP_INFO_RUNLOCK(pcbinfo);
879 * Lookup a PCB based on the local address and port.
881 #define INP_LOOKUP_MAPPED_PCB_COST 3
883 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
884 u_short lport, int wild_okay, struct ucred *cred)
888 int matchwild = 3 + INP_LOOKUP_MAPPED_PCB_COST;
894 INP_INFO_LOCK_ASSERT(pcbinfo);
897 struct inpcbhead *head;
899 * Look for an unconnected (wildcard foreign addr) PCB that
900 * matches the local address and port we're looking for.
902 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
903 0, pcbinfo->ipi_hashmask)];
904 LIST_FOREACH(inp, head, inp_hash) {
906 if ((inp->inp_vflag & INP_IPV4) == 0)
909 if (inp->inp_faddr.s_addr == INADDR_ANY &&
910 inp->inp_laddr.s_addr == laddr.s_addr &&
911 inp->inp_lport == lport) {
923 struct inpcbporthead *porthash;
924 struct inpcbport *phd;
925 struct inpcb *match = NULL;
927 * Best fit PCB lookup.
929 * First see if this local port is in use by looking on the
932 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
933 pcbinfo->ipi_porthashmask)];
934 LIST_FOREACH(phd, porthash, phd_hash) {
935 if (phd->phd_port == lport)
940 * Port is in use by one or more PCBs. Look for best
943 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
946 if ((inp->inp_vflag & INP_IPV4) == 0)
949 * We never select the PCB that has
950 * INP_IPV6 flag and is bound to :: if
951 * we have another PCB which is bound
952 * to 0.0.0.0. If a PCB has the
953 * INP_IPV6 flag, then we set its cost
954 * higher than IPv4 only PCBs.
956 * Note that the case only happens
957 * when a socket is bound to ::, under
958 * the condition that the use of the
959 * mapped address is allowed.
961 if ((inp->inp_vflag & INP_IPV6) != 0)
962 wildcard += INP_LOOKUP_MAPPED_PCB_COST;
964 if (inp->inp_faddr.s_addr != INADDR_ANY)
966 if (inp->inp_laddr.s_addr != INADDR_ANY) {
967 if (laddr.s_addr == INADDR_ANY)
969 else if (inp->inp_laddr.s_addr != laddr.s_addr)
972 if (laddr.s_addr != INADDR_ANY)
975 if (wildcard < matchwild) {
977 matchwild = wildcard;
978 if (matchwild == 0) {
987 #undef INP_LOOKUP_MAPPED_PCB_COST
990 * Lookup PCB in hash list.
993 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
994 u_int fport_arg, struct in_addr laddr, u_int lport_arg, int wildcard,
997 struct inpcbhead *head;
999 u_short fport = fport_arg, lport = lport_arg;
1001 INP_INFO_LOCK_ASSERT(pcbinfo);
1004 * First look for an exact match.
1006 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
1007 pcbinfo->ipi_hashmask)];
1008 LIST_FOREACH(inp, head, inp_hash) {
1010 if ((inp->inp_vflag & INP_IPV4) == 0)
1013 if (inp->inp_faddr.s_addr == faddr.s_addr &&
1014 inp->inp_laddr.s_addr == laddr.s_addr &&
1015 inp->inp_fport == fport &&
1016 inp->inp_lport == lport)
1021 * Then look for a wildcard match, if requested.
1024 struct inpcb *local_wild = NULL;
1026 struct inpcb *local_wild_mapped = NULL;
1029 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1030 0, pcbinfo->ipi_hashmask)];
1031 LIST_FOREACH(inp, head, inp_hash) {
1033 if ((inp->inp_vflag & INP_IPV4) == 0)
1036 if (inp->inp_faddr.s_addr == INADDR_ANY &&
1037 inp->inp_lport == lport) {
1038 if (ifp && ifp->if_type == IFT_FAITH &&
1039 (inp->inp_flags & INP_FAITH) == 0)
1041 if (inp->inp_laddr.s_addr == laddr.s_addr)
1043 else if (inp->inp_laddr.s_addr == INADDR_ANY) {
1045 if (INP_CHECK_SOCKAF(inp->inp_socket,
1047 local_wild_mapped = inp;
1055 if (local_wild == NULL)
1056 return (local_wild_mapped);
1058 return (local_wild);
1064 * Insert PCB onto various hash lists.
1067 in_pcbinshash(struct inpcb *inp)
1069 struct inpcbhead *pcbhash;
1070 struct inpcbporthead *pcbporthash;
1071 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1072 struct inpcbport *phd;
1073 u_int32_t hashkey_faddr;
1075 INP_INFO_WLOCK_ASSERT(pcbinfo);
1076 INP_WLOCK_ASSERT(inp);
1079 if (inp->inp_vflag & INP_IPV6)
1080 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
1083 hashkey_faddr = inp->inp_faddr.s_addr;
1085 pcbhash = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
1086 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
1088 pcbporthash = &pcbinfo->ipi_porthashbase[
1089 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->ipi_porthashmask)];
1092 * Go through port list and look for a head for this lport.
1094 LIST_FOREACH(phd, pcbporthash, phd_hash) {
1095 if (phd->phd_port == inp->inp_lport)
1099 * If none exists, malloc one and tack it on.
1102 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport), M_PCB, M_NOWAIT);
1104 return (ENOBUFS); /* XXX */
1106 phd->phd_port = inp->inp_lport;
1107 LIST_INIT(&phd->phd_pcblist);
1108 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1111 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1112 LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
1117 * Move PCB to the proper hash bucket when { faddr, fport } have been
1118 * changed. NOTE: This does not handle the case of the lport changing (the
1119 * hashed port list would have to be updated as well), so the lport must
1120 * not change after in_pcbinshash() has been called.
1123 in_pcbrehash(struct inpcb *inp)
1125 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1126 struct inpcbhead *head;
1127 u_int32_t hashkey_faddr;
1129 INP_INFO_WLOCK_ASSERT(pcbinfo);
1130 INP_WLOCK_ASSERT(inp);
1133 if (inp->inp_vflag & INP_IPV6)
1134 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
1137 hashkey_faddr = inp->inp_faddr.s_addr;
1139 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
1140 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
1142 LIST_REMOVE(inp, inp_hash);
1143 LIST_INSERT_HEAD(head, inp, inp_hash);
1147 * Remove PCB from various lists.
1150 in_pcbremlists(struct inpcb *inp)
1152 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1154 INP_INFO_WLOCK_ASSERT(pcbinfo);
1155 INP_WLOCK_ASSERT(inp);
1157 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
1158 if (inp->inp_lport) {
1159 struct inpcbport *phd = inp->inp_phd;
1161 LIST_REMOVE(inp, inp_hash);
1162 LIST_REMOVE(inp, inp_portlist);
1163 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1164 LIST_REMOVE(phd, phd_hash);
1168 LIST_REMOVE(inp, inp_list);
1169 pcbinfo->ipi_count--;
1173 * A set label operation has occurred at the socket layer, propagate the
1174 * label change into the in_pcb for the socket.
1177 in_pcbsosetlabel(struct socket *so)
1182 inp = sotoinpcb(so);
1183 KASSERT(inp != NULL, ("in_pcbsosetlabel: so->so_pcb == NULL"));
1187 mac_inpcb_sosetlabel(so, inp);
1194 * ipport_tick runs once per second, determining if random port allocation
1195 * should be continued. If more than ipport_randomcps ports have been
1196 * allocated in the last second, then we return to sequential port
1197 * allocation. We return to random allocation only once we drop below
1198 * ipport_randomcps for at least ipport_randomtime seconds.
1201 ipport_tick(void *xtp)
1204 if (ipport_tcpallocs <= ipport_tcplastcount + ipport_randomcps) {
1205 if (ipport_stoprandom > 0)
1206 ipport_stoprandom--;
1208 ipport_stoprandom = ipport_randomtime;
1209 ipport_tcplastcount = ipport_tcpallocs;
1210 callout_reset(&ipport_tick_callout, hz, ipport_tick, NULL);
1214 inp_wlock(struct inpcb *inp)
1221 inp_wunlock(struct inpcb *inp)
1228 inp_rlock(struct inpcb *inp)
1235 inp_runlock(struct inpcb *inp)
1243 inp_lock_assert(struct inpcb *inp)
1246 INP_WLOCK_ASSERT(inp);
1250 inp_unlock_assert(struct inpcb *inp)
1253 INP_UNLOCK_ASSERT(inp);
1258 inp_apply_all(void (*func)(struct inpcb *, void *), void *arg)
1262 INP_INFO_RLOCK(&tcbinfo);
1263 LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list) {
1268 INP_INFO_RUNLOCK(&tcbinfo);
1272 inp_inpcbtosocket(struct inpcb *inp)
1275 INP_WLOCK_ASSERT(inp);
1276 return (inp->inp_socket);
1280 inp_inpcbtotcpcb(struct inpcb *inp)
1283 INP_WLOCK_ASSERT(inp);
1284 return ((struct tcpcb *)inp->inp_ppcb);
1288 inp_ip_tos_get(const struct inpcb *inp)
1291 return (inp->inp_ip_tos);
1295 inp_ip_tos_set(struct inpcb *inp, int val)
1298 inp->inp_ip_tos = val;
1302 inp_4tuple_get(const struct inpcb *inp, uint32_t *laddr, uint16_t *lp,
1303 uint32_t *faddr, uint16_t *fp)
1306 INP_LOCK_ASSERT(inp);
1307 *laddr = inp->inp_laddr;
1308 *faddr = inp->inp_faddr;
1309 *lp = inp->inp_lport;
1310 *fp = inp->inp_fport;
1314 so_sotoinpcb(struct socket *so)
1317 return (sotoinpcb(so));
1321 so_sototcpcb(struct socket *so)
1324 return (sototcpcb(so));
1329 db_print_indent(int indent)
1333 for (i = 0; i < indent; i++)
1338 db_print_inconninfo(struct in_conninfo *inc, const char *name, int indent)
1340 char faddr_str[48], laddr_str[48];
1342 db_print_indent(indent);
1343 db_printf("%s at %p\n", name, inc);
1348 if (inc->inc_flags == 1) {
1350 ip6_sprintf(laddr_str, &inc->inc6_laddr);
1351 ip6_sprintf(faddr_str, &inc->inc6_faddr);
1355 inet_ntoa_r(inc->inc_laddr, laddr_str);
1356 inet_ntoa_r(inc->inc_faddr, faddr_str);
1360 db_print_indent(indent);
1361 db_printf("inc_laddr %s inc_lport %u\n", laddr_str,
1362 ntohs(inc->inc_lport));
1363 db_print_indent(indent);
1364 db_printf("inc_faddr %s inc_fport %u\n", faddr_str,
1365 ntohs(inc->inc_fport));
1369 db_print_inpflags(int inp_flags)
1374 if (inp_flags & INP_RECVOPTS) {
1375 db_printf("%sINP_RECVOPTS", comma ? ", " : "");
1378 if (inp_flags & INP_RECVRETOPTS) {
1379 db_printf("%sINP_RECVRETOPTS", comma ? ", " : "");
1382 if (inp_flags & INP_RECVDSTADDR) {
1383 db_printf("%sINP_RECVDSTADDR", comma ? ", " : "");
1386 if (inp_flags & INP_HDRINCL) {
1387 db_printf("%sINP_HDRINCL", comma ? ", " : "");
1390 if (inp_flags & INP_HIGHPORT) {
1391 db_printf("%sINP_HIGHPORT", comma ? ", " : "");
1394 if (inp_flags & INP_LOWPORT) {
1395 db_printf("%sINP_LOWPORT", comma ? ", " : "");
1398 if (inp_flags & INP_ANONPORT) {
1399 db_printf("%sINP_ANONPORT", comma ? ", " : "");
1402 if (inp_flags & INP_RECVIF) {
1403 db_printf("%sINP_RECVIF", comma ? ", " : "");
1406 if (inp_flags & INP_MTUDISC) {
1407 db_printf("%sINP_MTUDISC", comma ? ", " : "");
1410 if (inp_flags & INP_FAITH) {
1411 db_printf("%sINP_FAITH", comma ? ", " : "");
1414 if (inp_flags & INP_RECVTTL) {
1415 db_printf("%sINP_RECVTTL", comma ? ", " : "");
1418 if (inp_flags & INP_DONTFRAG) {
1419 db_printf("%sINP_DONTFRAG", comma ? ", " : "");
1422 if (inp_flags & IN6P_IPV6_V6ONLY) {
1423 db_printf("%sIN6P_IPV6_V6ONLY", comma ? ", " : "");
1426 if (inp_flags & IN6P_PKTINFO) {
1427 db_printf("%sIN6P_PKTINFO", comma ? ", " : "");
1430 if (inp_flags & IN6P_HOPLIMIT) {
1431 db_printf("%sIN6P_HOPLIMIT", comma ? ", " : "");
1434 if (inp_flags & IN6P_HOPOPTS) {
1435 db_printf("%sIN6P_HOPOPTS", comma ? ", " : "");
1438 if (inp_flags & IN6P_DSTOPTS) {
1439 db_printf("%sIN6P_DSTOPTS", comma ? ", " : "");
1442 if (inp_flags & IN6P_RTHDR) {
1443 db_printf("%sIN6P_RTHDR", comma ? ", " : "");
1446 if (inp_flags & IN6P_RTHDRDSTOPTS) {
1447 db_printf("%sIN6P_RTHDRDSTOPTS", comma ? ", " : "");
1450 if (inp_flags & IN6P_TCLASS) {
1451 db_printf("%sIN6P_TCLASS", comma ? ", " : "");
1454 if (inp_flags & IN6P_AUTOFLOWLABEL) {
1455 db_printf("%sIN6P_AUTOFLOWLABEL", comma ? ", " : "");
1458 if (inp_flags & IN6P_RFC2292) {
1459 db_printf("%sIN6P_RFC2292", comma ? ", " : "");
1462 if (inp_flags & IN6P_MTU) {
1463 db_printf("IN6P_MTU%s", comma ? ", " : "");
1469 db_print_inpvflag(u_char inp_vflag)
1474 if (inp_vflag & INP_IPV4) {
1475 db_printf("%sINP_IPV4", comma ? ", " : "");
1478 if (inp_vflag & INP_IPV6) {
1479 db_printf("%sINP_IPV6", comma ? ", " : "");
1482 if (inp_vflag & INP_IPV6PROTO) {
1483 db_printf("%sINP_IPV6PROTO", comma ? ", " : "");
1486 if (inp_vflag & INP_TIMEWAIT) {
1487 db_printf("%sINP_TIMEWAIT", comma ? ", " : "");
1490 if (inp_vflag & INP_ONESBCAST) {
1491 db_printf("%sINP_ONESBCAST", comma ? ", " : "");
1494 if (inp_vflag & INP_DROPPED) {
1495 db_printf("%sINP_DROPPED", comma ? ", " : "");
1498 if (inp_vflag & INP_SOCKREF) {
1499 db_printf("%sINP_SOCKREF", comma ? ", " : "");
1505 db_print_inpcb(struct inpcb *inp, const char *name, int indent)
1508 db_print_indent(indent);
1509 db_printf("%s at %p\n", name, inp);
1513 db_print_indent(indent);
1514 db_printf("inp_flow: 0x%x\n", inp->inp_flow);
1516 db_print_inconninfo(&inp->inp_inc, "inp_conninfo", indent);
1518 db_print_indent(indent);
1519 db_printf("inp_ppcb: %p inp_pcbinfo: %p inp_socket: %p\n",
1520 inp->inp_ppcb, inp->inp_pcbinfo, inp->inp_socket);
1522 db_print_indent(indent);
1523 db_printf("inp_label: %p inp_flags: 0x%x (",
1524 inp->inp_label, inp->inp_flags);
1525 db_print_inpflags(inp->inp_flags);
1528 db_print_indent(indent);
1529 db_printf("inp_sp: %p inp_vflag: 0x%x (", inp->inp_sp,
1531 db_print_inpvflag(inp->inp_vflag);
1534 db_print_indent(indent);
1535 db_printf("inp_ip_ttl: %d inp_ip_p: %d inp_ip_minttl: %d\n",
1536 inp->inp_ip_ttl, inp->inp_ip_p, inp->inp_ip_minttl);
1538 db_print_indent(indent);
1540 if (inp->inp_vflag & INP_IPV6) {
1541 db_printf("in6p_options: %p in6p_outputopts: %p "
1542 "in6p_moptions: %p\n", inp->in6p_options,
1543 inp->in6p_outputopts, inp->in6p_moptions);
1544 db_printf("in6p_icmp6filt: %p in6p_cksum %d "
1545 "in6p_hops %u\n", inp->in6p_icmp6filt, inp->in6p_cksum,
1550 db_printf("inp_ip_tos: %d inp_ip_options: %p "
1551 "inp_ip_moptions: %p\n", inp->inp_ip_tos,
1552 inp->inp_options, inp->inp_moptions);
1555 db_print_indent(indent);
1556 db_printf("inp_phd: %p inp_gencnt: %ju\n", inp->inp_phd,
1557 (uintmax_t)inp->inp_gencnt);
1560 DB_SHOW_COMMAND(inpcb, db_show_inpcb)
1565 db_printf("usage: show inpcb <addr>\n");
1568 inp = (struct inpcb *)addr;
1570 db_print_inpcb(inp, "inpcb", 0);