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
36 #include "opt_ipsec.h"
37 #include "opt_inet6.h"
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/malloc.h>
44 #include <sys/domain.h>
45 #include <sys/protosw.h>
46 #include <sys/socket.h>
47 #include <sys/socketvar.h>
51 #include <sys/kernel.h>
52 #include <sys/sysctl.h>
61 #include <net/if_types.h>
62 #include <net/route.h>
64 #include <netinet/in.h>
65 #include <netinet/in_pcb.h>
66 #include <netinet/in_var.h>
67 #include <netinet/ip_var.h>
68 #include <netinet/tcp_var.h>
69 #include <netinet/udp.h>
70 #include <netinet/udp_var.h>
72 #include <netinet/ip6.h>
73 #include <netinet6/ip6_var.h>
78 #include <netipsec/ipsec.h>
79 #include <netipsec/key.h>
82 #include <security/mac/mac_framework.h>
85 * These configure the range of local port addresses assigned to
86 * "unspecified" outgoing connections/packets/whatever.
88 int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */
89 int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */
90 int ipport_firstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
91 int ipport_lastauto = IPPORT_HILASTAUTO; /* 65535 */
92 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
93 int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */
96 * Reserved ports accessible only to root. There are significant
97 * security considerations that must be accounted for when changing these,
98 * but the security benefits can be great. Please be careful.
100 int ipport_reservedhigh = IPPORT_RESERVED - 1; /* 1023 */
101 int ipport_reservedlow = 0;
103 /* Variables dealing with random ephemeral port allocation. */
104 int ipport_randomized = 1; /* user controlled via sysctl */
105 int ipport_randomcps = 10; /* user controlled via sysctl */
106 int ipport_randomtime = 45; /* user controlled via sysctl */
107 int ipport_stoprandom = 0; /* toggled by ipport_tick */
108 int ipport_tcpallocs;
109 int ipport_tcplastcount;
111 #define RANGECHK(var, min, max) \
112 if ((var) < (min)) { (var) = (min); } \
113 else if ((var) > (max)) { (var) = (max); }
116 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
120 error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
122 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
123 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
124 RANGECHK(ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX);
125 RANGECHK(ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX);
126 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX);
127 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX);
134 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
136 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
137 &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
138 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
139 &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
140 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
141 &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
142 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
143 &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
144 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
145 &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
146 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
147 &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
148 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedhigh,
149 CTLFLAG_RW|CTLFLAG_SECURE, &ipport_reservedhigh, 0, "");
150 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedlow,
151 CTLFLAG_RW|CTLFLAG_SECURE, &ipport_reservedlow, 0, "");
152 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomized, CTLFLAG_RW,
153 &ipport_randomized, 0, "Enable random port allocation");
154 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomcps, CTLFLAG_RW,
155 &ipport_randomcps, 0, "Maximum number of random port "
156 "allocations before switching to a sequental one");
157 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomtime, CTLFLAG_RW,
158 &ipport_randomtime, 0, "Minimum time to keep sequental port "
159 "allocation before switching to a random one");
162 * in_pcb.c: manage the Protocol Control Blocks.
164 * NOTE: It is assumed that most of these functions will be called with
165 * the pcbinfo lock held, and often, the inpcb lock held, as these utility
166 * functions often modify hash chains or addresses in pcbs.
170 * Allocate a PCB and associate it with the socket.
171 * On success return with the PCB locked.
174 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
179 INP_INFO_WLOCK_ASSERT(pcbinfo);
181 inp = uma_zalloc(pcbinfo->ipi_zone, M_NOWAIT);
184 bzero(inp, inp_zero_size);
185 inp->inp_pcbinfo = pcbinfo;
186 inp->inp_socket = so;
188 error = mac_init_inpcb(inp, M_NOWAIT);
192 mac_create_inpcb_from_socket(so, inp);
197 error = ipsec_init_policy(so, &inp->inp_sp);
202 if (INP_SOCKAF(so) == AF_INET6) {
203 inp->inp_vflag |= INP_IPV6PROTO;
205 inp->inp_flags |= IN6P_IPV6_V6ONLY;
208 LIST_INSERT_HEAD(pcbinfo->ipi_listhead, inp, inp_list);
209 pcbinfo->ipi_count++;
210 so->so_pcb = (caddr_t)inp;
212 if (ip6_auto_flowlabel)
213 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
216 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
218 #if defined(IPSEC) || defined(MAC)
221 uma_zfree(pcbinfo->ipi_zone, inp);
227 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
231 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
232 INP_LOCK_ASSERT(inp);
234 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
236 anonport = inp->inp_lport == 0 && (nam == NULL ||
237 ((struct sockaddr_in *)nam)->sin_port == 0);
238 error = in_pcbbind_setup(inp, nam, &inp->inp_laddr.s_addr,
239 &inp->inp_lport, cred);
242 if (in_pcbinshash(inp) != 0) {
243 inp->inp_laddr.s_addr = INADDR_ANY;
248 inp->inp_flags |= INP_ANONPORT;
253 * Set up a bind operation on a PCB, performing port allocation
254 * as required, but do not actually modify the PCB. Callers can
255 * either complete the bind by setting inp_laddr/inp_lport and
256 * calling in_pcbinshash(), or they can just use the resulting
257 * port and address to authorise the sending of a once-off packet.
259 * On error, the values of *laddrp and *lportp are not changed.
262 in_pcbbind_setup(struct inpcb *inp, struct sockaddr *nam, in_addr_t *laddrp,
263 u_short *lportp, struct ucred *cred)
265 struct socket *so = inp->inp_socket;
266 unsigned short *lastport;
267 struct sockaddr_in *sin;
268 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
269 struct in_addr laddr;
271 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
272 int error, prison = 0;
275 INP_INFO_WLOCK_ASSERT(pcbinfo);
276 INP_LOCK_ASSERT(inp);
278 if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */
279 return (EADDRNOTAVAIL);
280 laddr.s_addr = *laddrp;
281 if (nam != NULL && laddr.s_addr != INADDR_ANY)
283 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
284 wild = INPLOOKUP_WILDCARD;
286 sin = (struct sockaddr_in *)nam;
287 if (nam->sa_len != sizeof (*sin))
291 * We should check the family, but old programs
292 * incorrectly fail to initialize it.
294 if (sin->sin_family != AF_INET)
295 return (EAFNOSUPPORT);
297 if (sin->sin_addr.s_addr != INADDR_ANY)
298 if (prison_ip(cred, 0, &sin->sin_addr.s_addr))
300 if (sin->sin_port != *lportp) {
301 /* Don't allow the port to change. */
304 lport = sin->sin_port;
306 /* NB: lport is left as 0 if the port isn't being changed. */
307 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
309 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
310 * allow complete duplication of binding if
311 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
312 * and a multicast address is bound on both
313 * new and duplicated sockets.
315 if (so->so_options & SO_REUSEADDR)
316 reuseport = SO_REUSEADDR|SO_REUSEPORT;
317 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
318 sin->sin_port = 0; /* yech... */
319 bzero(&sin->sin_zero, sizeof(sin->sin_zero));
320 if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
321 return (EADDRNOTAVAIL);
323 laddr = sin->sin_addr;
329 if (ntohs(lport) <= ipport_reservedhigh &&
330 ntohs(lport) >= ipport_reservedlow &&
331 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
336 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
337 priv_check_cred(so->so_cred,
338 PRIV_NETINET_REUSEPORT, 0) != 0) {
339 t = in_pcblookup_local(inp->inp_pcbinfo,
340 sin->sin_addr, lport,
341 prison ? 0 : INPLOOKUP_WILDCARD);
344 * This entire block sorely needs a rewrite.
347 ((t->inp_vflag & INP_TIMEWAIT) == 0) &&
348 (so->so_type != SOCK_STREAM ||
349 ntohl(t->inp_faddr.s_addr) == INADDR_ANY) &&
350 (ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
351 ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
352 (t->inp_socket->so_options &
353 SO_REUSEPORT) == 0) &&
354 (so->so_cred->cr_uid !=
355 t->inp_socket->so_cred->cr_uid))
358 if (prison && prison_ip(cred, 0, &sin->sin_addr.s_addr))
359 return (EADDRNOTAVAIL);
360 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
361 lport, prison ? 0 : wild);
362 if (t && (t->inp_vflag & INP_TIMEWAIT)) {
364 * XXXRW: If an incpb has had its timewait
365 * state recycled, we treat the address as
366 * being in use (for now). This is better
367 * than a panic, but not desirable.
371 (reuseport & tw->tw_so_options) == 0)
374 (reuseport & t->inp_socket->so_options) == 0) {
376 if (ntohl(sin->sin_addr.s_addr) !=
378 ntohl(t->inp_laddr.s_addr) !=
381 INP_SOCKAF(t->inp_socket))
393 if (laddr.s_addr != INADDR_ANY)
394 if (prison_ip(cred, 0, &laddr.s_addr))
397 if (inp->inp_flags & INP_HIGHPORT) {
398 first = ipport_hifirstauto; /* sysctl */
399 last = ipport_hilastauto;
400 lastport = &pcbinfo->ipi_lasthi;
401 } else if (inp->inp_flags & INP_LOWPORT) {
402 error = priv_check_cred(cred,
403 PRIV_NETINET_RESERVEDPORT, 0);
406 first = ipport_lowfirstauto; /* 1023 */
407 last = ipport_lowlastauto; /* 600 */
408 lastport = &pcbinfo->ipi_lastlow;
410 first = ipport_firstauto; /* sysctl */
411 last = ipport_lastauto;
412 lastport = &pcbinfo->ipi_lastport;
415 * For UDP, use random port allocation as long as the user
416 * allows it. For TCP (and as of yet unknown) connections,
417 * use random port allocation only if the user allows it AND
418 * ipport_tick() allows it.
420 if (ipport_randomized &&
421 (!ipport_stoprandom || pcbinfo == &udbinfo))
426 * It makes no sense to do random port allocation if
427 * we have the only port available.
431 /* Make sure to not include UDP packets in the count. */
432 if (pcbinfo != &udbinfo)
435 * Simple check to ensure all ports are not used up causing
438 * We split the two cases (up and down) so that the direction
439 * is not being tested on each round of the loop.
447 (arc4random() % (first - last));
448 count = first - last;
451 if (count-- < 0) /* completely used? */
452 return (EADDRNOTAVAIL);
454 if (*lastport > first || *lastport < last)
456 lport = htons(*lastport);
457 } while (in_pcblookup_local(pcbinfo, laddr, lport,
465 (arc4random() % (last - first));
466 count = last - first;
469 if (count-- < 0) /* completely used? */
470 return (EADDRNOTAVAIL);
472 if (*lastport < first || *lastport > last)
474 lport = htons(*lastport);
475 } while (in_pcblookup_local(pcbinfo, laddr, lport,
479 if (prison_ip(cred, 0, &laddr.s_addr))
481 *laddrp = laddr.s_addr;
487 * Connect from a socket to a specified address.
488 * Both address and port must be specified in argument sin.
489 * If don't have a local address for this socket yet,
493 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
495 u_short lport, fport;
496 in_addr_t laddr, faddr;
499 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
500 INP_LOCK_ASSERT(inp);
502 lport = inp->inp_lport;
503 laddr = inp->inp_laddr.s_addr;
504 anonport = (lport == 0);
505 error = in_pcbconnect_setup(inp, nam, &laddr, &lport, &faddr, &fport,
510 /* Do the initial binding of the local address if required. */
511 if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) {
512 inp->inp_lport = lport;
513 inp->inp_laddr.s_addr = laddr;
514 if (in_pcbinshash(inp) != 0) {
515 inp->inp_laddr.s_addr = INADDR_ANY;
521 /* Commit the remaining changes. */
522 inp->inp_lport = lport;
523 inp->inp_laddr.s_addr = laddr;
524 inp->inp_faddr.s_addr = faddr;
525 inp->inp_fport = fport;
529 inp->inp_flags |= INP_ANONPORT;
534 * Set up for a connect from a socket to the specified address.
535 * On entry, *laddrp and *lportp should contain the current local
536 * address and port for the PCB; these are updated to the values
537 * that should be placed in inp_laddr and inp_lport to complete
540 * On success, *faddrp and *fportp will be set to the remote address
541 * and port. These are not updated in the error case.
543 * If the operation fails because the connection already exists,
544 * *oinpp will be set to the PCB of that connection so that the
545 * caller can decide to override it. In all other cases, *oinpp
549 in_pcbconnect_setup(struct inpcb *inp, struct sockaddr *nam,
550 in_addr_t *laddrp, u_short *lportp, in_addr_t *faddrp, u_short *fportp,
551 struct inpcb **oinpp, struct ucred *cred)
553 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
554 struct in_ifaddr *ia;
555 struct sockaddr_in sa;
556 struct ucred *socred;
558 struct in_addr laddr, faddr;
559 u_short lport, fport;
562 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
563 INP_LOCK_ASSERT(inp);
567 if (nam->sa_len != sizeof (*sin))
569 if (sin->sin_family != AF_INET)
570 return (EAFNOSUPPORT);
571 if (sin->sin_port == 0)
572 return (EADDRNOTAVAIL);
573 laddr.s_addr = *laddrp;
575 faddr = sin->sin_addr;
576 fport = sin->sin_port;
577 socred = inp->inp_socket->so_cred;
578 if (laddr.s_addr == INADDR_ANY && jailed(socred)) {
579 bzero(&sa, sizeof(sa));
580 sa.sin_addr.s_addr = htonl(prison_getip(socred));
581 sa.sin_len = sizeof(sa);
582 sa.sin_family = AF_INET;
583 error = in_pcbbind_setup(inp, (struct sockaddr *)&sa,
584 &laddr.s_addr, &lport, cred);
588 if (!TAILQ_EMPTY(&in_ifaddrhead)) {
590 * If the destination address is INADDR_ANY,
591 * use the primary local address.
592 * If the supplied address is INADDR_BROADCAST,
593 * and the primary interface supports broadcast,
594 * choose the broadcast address for that interface.
596 if (faddr.s_addr == INADDR_ANY)
597 faddr = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr;
598 else if (faddr.s_addr == (u_long)INADDR_BROADCAST &&
599 (TAILQ_FIRST(&in_ifaddrhead)->ia_ifp->if_flags &
601 faddr = satosin(&TAILQ_FIRST(
602 &in_ifaddrhead)->ia_broadaddr)->sin_addr;
604 if (laddr.s_addr == INADDR_ANY) {
605 ia = (struct in_ifaddr *)0;
607 * If route is known our src addr is taken from the i/f,
610 * Find out route to destination
612 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0)
613 ia = ip_rtaddr(faddr);
615 * If we found a route, use the address corresponding to
616 * the outgoing interface.
618 * Otherwise assume faddr is reachable on a directly connected
619 * network and try to find a corresponding interface to take
620 * the source address from.
623 bzero(&sa, sizeof(sa));
625 sa.sin_len = sizeof(sa);
626 sa.sin_family = AF_INET;
628 ia = ifatoia(ifa_ifwithdstaddr(sintosa(&sa)));
630 ia = ifatoia(ifa_ifwithnet(sintosa(&sa)));
632 return (ENETUNREACH);
635 * If the destination address is multicast and an outgoing
636 * interface has been set as a multicast option, use the
637 * address of that interface as our source address.
639 if (IN_MULTICAST(ntohl(faddr.s_addr)) &&
640 inp->inp_moptions != NULL) {
641 struct ip_moptions *imo;
644 imo = inp->inp_moptions;
645 if (imo->imo_multicast_ifp != NULL) {
646 ifp = imo->imo_multicast_ifp;
647 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
648 if (ia->ia_ifp == ifp)
651 return (EADDRNOTAVAIL);
654 laddr = ia->ia_addr.sin_addr;
657 oinp = in_pcblookup_hash(inp->inp_pcbinfo, faddr, fport, laddr, lport,
665 error = in_pcbbind_setup(inp, NULL, &laddr.s_addr, &lport,
670 *laddrp = laddr.s_addr;
672 *faddrp = faddr.s_addr;
678 in_pcbdisconnect(struct inpcb *inp)
681 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
682 INP_LOCK_ASSERT(inp);
684 inp->inp_faddr.s_addr = INADDR_ANY;
690 * In the old world order, in_pcbdetach() served two functions: to detach the
691 * pcb from the socket/potentially free the socket, and to free the pcb
692 * itself. In the new world order, the protocol code is responsible for
693 * managing the relationship with the socket, and this code simply frees the
697 in_pcbdetach(struct inpcb *inp)
700 KASSERT(inp->inp_socket != NULL, ("in_pcbdetach: inp_socket == NULL"));
701 inp->inp_socket->so_pcb = NULL;
702 inp->inp_socket = NULL;
706 in_pcbfree(struct inpcb *inp)
708 struct inpcbinfo *ipi = inp->inp_pcbinfo;
710 KASSERT(inp->inp_socket == NULL, ("in_pcbfree: inp_socket != NULL"));
711 INP_INFO_WLOCK_ASSERT(ipi);
712 INP_LOCK_ASSERT(inp);
715 ipsec4_delete_pcbpolicy(inp);
717 inp->inp_gencnt = ++ipi->ipi_gencnt;
719 if (inp->inp_options)
720 (void)m_free(inp->inp_options);
721 if (inp->inp_moptions != NULL)
722 inp_freemoptions(inp->inp_moptions);
726 mac_destroy_inpcb(inp);
729 uma_zfree(ipi->ipi_zone, inp);
733 * TCP needs to maintain its inpcb structure after the TCP connection has
734 * been torn down. However, it must be disconnected from the inpcb hashes as
735 * it must not prevent binding of future connections to the same port/ip
736 * combination by other inpcbs.
739 in_pcbdrop(struct inpcb *inp)
742 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
743 INP_LOCK_ASSERT(inp);
745 inp->inp_vflag |= INP_DROPPED;
746 if (inp->inp_lport) {
747 struct inpcbport *phd = inp->inp_phd;
749 LIST_REMOVE(inp, inp_hash);
750 LIST_REMOVE(inp, inp_portlist);
751 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
752 LIST_REMOVE(phd, phd_hash);
760 * Common routines to return the socket addresses associated with inpcbs.
763 in_sockaddr(in_port_t port, struct in_addr *addr_p)
765 struct sockaddr_in *sin;
767 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
769 sin->sin_family = AF_INET;
770 sin->sin_len = sizeof(*sin);
771 sin->sin_addr = *addr_p;
772 sin->sin_port = port;
774 return (struct sockaddr *)sin;
778 in_getsockaddr(struct socket *so, struct sockaddr **nam)
785 KASSERT(inp != NULL, ("in_getsockaddr: inp == NULL"));
788 port = inp->inp_lport;
789 addr = inp->inp_laddr;
792 *nam = in_sockaddr(port, &addr);
797 in_getpeeraddr(struct socket *so, struct sockaddr **nam)
804 KASSERT(inp != NULL, ("in_getpeeraddr: inp == NULL"));
807 port = inp->inp_fport;
808 addr = inp->inp_faddr;
811 *nam = in_sockaddr(port, &addr);
816 in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr faddr, int errno,
817 struct inpcb *(*notify)(struct inpcb *, int))
819 struct inpcb *inp, *ninp;
820 struct inpcbhead *head;
822 INP_INFO_WLOCK(pcbinfo);
823 head = pcbinfo->ipi_listhead;
824 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
826 ninp = LIST_NEXT(inp, inp_list);
828 if ((inp->inp_vflag & INP_IPV4) == 0) {
833 if (inp->inp_faddr.s_addr != faddr.s_addr ||
834 inp->inp_socket == NULL) {
838 if ((*notify)(inp, errno))
841 INP_INFO_WUNLOCK(pcbinfo);
845 in_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
848 struct ip_moptions *imo;
851 INP_INFO_RLOCK(pcbinfo);
852 LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) {
854 imo = inp->inp_moptions;
855 if ((inp->inp_vflag & INP_IPV4) &&
858 * Unselect the outgoing interface if it is being
861 if (imo->imo_multicast_ifp == ifp)
862 imo->imo_multicast_ifp = NULL;
865 * Drop multicast group membership if we joined
866 * through the interface being detached.
868 for (i = 0, gap = 0; i < imo->imo_num_memberships;
870 if (imo->imo_membership[i]->inm_ifp == ifp) {
871 in_delmulti(imo->imo_membership[i]);
874 imo->imo_membership[i - gap] =
875 imo->imo_membership[i];
877 imo->imo_num_memberships -= gap;
881 INP_INFO_RUNLOCK(pcbinfo);
885 * Lookup a PCB based on the local address and port.
887 #define INP_LOOKUP_MAPPED_PCB_COST 3
889 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
890 u_int lport_arg, int wild_okay)
894 int matchwild = 3 + INP_LOOKUP_MAPPED_PCB_COST;
899 u_short lport = lport_arg;
901 INP_INFO_WLOCK_ASSERT(pcbinfo);
904 struct inpcbhead *head;
906 * Look for an unconnected (wildcard foreign addr) PCB that
907 * matches the local address and port we're looking for.
909 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
910 0, pcbinfo->ipi_hashmask)];
911 LIST_FOREACH(inp, head, inp_hash) {
913 if ((inp->inp_vflag & INP_IPV4) == 0)
916 if (inp->inp_faddr.s_addr == INADDR_ANY &&
917 inp->inp_laddr.s_addr == laddr.s_addr &&
918 inp->inp_lport == lport) {
930 struct inpcbporthead *porthash;
931 struct inpcbport *phd;
932 struct inpcb *match = NULL;
934 * Best fit PCB lookup.
936 * First see if this local port is in use by looking on the
939 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
940 pcbinfo->ipi_porthashmask)];
941 LIST_FOREACH(phd, porthash, phd_hash) {
942 if (phd->phd_port == lport)
947 * Port is in use by one or more PCBs. Look for best
950 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
953 if ((inp->inp_vflag & INP_IPV4) == 0)
956 * We never select the PCB that has
957 * INP_IPV6 flag and is bound to :: if
958 * we have another PCB which is bound
959 * to 0.0.0.0. If a PCB has the
960 * INP_IPV6 flag, then we set its cost
961 * higher than IPv4 only PCBs.
963 * Note that the case only happens
964 * when a socket is bound to ::, under
965 * the condition that the use of the
966 * mapped address is allowed.
968 if ((inp->inp_vflag & INP_IPV6) != 0)
969 wildcard += INP_LOOKUP_MAPPED_PCB_COST;
971 if (inp->inp_faddr.s_addr != INADDR_ANY)
973 if (inp->inp_laddr.s_addr != INADDR_ANY) {
974 if (laddr.s_addr == INADDR_ANY)
976 else if (inp->inp_laddr.s_addr != laddr.s_addr)
979 if (laddr.s_addr != INADDR_ANY)
982 if (wildcard < matchwild) {
984 matchwild = wildcard;
985 if (matchwild == 0) {
994 #undef INP_LOOKUP_MAPPED_PCB_COST
997 * Lookup PCB in hash list.
1000 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1001 u_int fport_arg, struct in_addr laddr, u_int lport_arg, int wildcard,
1004 struct inpcbhead *head;
1006 u_short fport = fport_arg, lport = lport_arg;
1008 INP_INFO_RLOCK_ASSERT(pcbinfo);
1011 * First look for an exact match.
1013 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
1014 pcbinfo->ipi_hashmask)];
1015 LIST_FOREACH(inp, head, inp_hash) {
1017 if ((inp->inp_vflag & INP_IPV4) == 0)
1020 if (inp->inp_faddr.s_addr == faddr.s_addr &&
1021 inp->inp_laddr.s_addr == laddr.s_addr &&
1022 inp->inp_fport == fport &&
1023 inp->inp_lport == lport)
1028 * Then look for a wildcard match, if requested.
1031 struct inpcb *local_wild = NULL;
1033 struct inpcb *local_wild_mapped = NULL;
1036 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1037 0, pcbinfo->ipi_hashmask)];
1038 LIST_FOREACH(inp, head, inp_hash) {
1040 if ((inp->inp_vflag & INP_IPV4) == 0)
1043 if (inp->inp_faddr.s_addr == INADDR_ANY &&
1044 inp->inp_lport == lport) {
1045 if (ifp && ifp->if_type == IFT_FAITH &&
1046 (inp->inp_flags & INP_FAITH) == 0)
1048 if (inp->inp_laddr.s_addr == laddr.s_addr)
1050 else if (inp->inp_laddr.s_addr == INADDR_ANY) {
1052 if (INP_CHECK_SOCKAF(inp->inp_socket,
1054 local_wild_mapped = inp;
1062 if (local_wild == NULL)
1063 return (local_wild_mapped);
1065 return (local_wild);
1071 * Insert PCB onto various hash lists.
1074 in_pcbinshash(struct inpcb *inp)
1076 struct inpcbhead *pcbhash;
1077 struct inpcbporthead *pcbporthash;
1078 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1079 struct inpcbport *phd;
1080 u_int32_t hashkey_faddr;
1082 INP_INFO_WLOCK_ASSERT(pcbinfo);
1083 INP_LOCK_ASSERT(inp);
1086 if (inp->inp_vflag & INP_IPV6)
1087 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
1090 hashkey_faddr = inp->inp_faddr.s_addr;
1092 pcbhash = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
1093 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
1095 pcbporthash = &pcbinfo->ipi_porthashbase[
1096 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->ipi_porthashmask)];
1099 * Go through port list and look for a head for this lport.
1101 LIST_FOREACH(phd, pcbporthash, phd_hash) {
1102 if (phd->phd_port == inp->inp_lport)
1106 * If none exists, malloc one and tack it on.
1109 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport), M_PCB, M_NOWAIT);
1111 return (ENOBUFS); /* XXX */
1113 phd->phd_port = inp->inp_lport;
1114 LIST_INIT(&phd->phd_pcblist);
1115 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1118 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1119 LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
1124 * Move PCB to the proper hash bucket when { faddr, fport } have been
1125 * changed. NOTE: This does not handle the case of the lport changing (the
1126 * hashed port list would have to be updated as well), so the lport must
1127 * not change after in_pcbinshash() has been called.
1130 in_pcbrehash(struct inpcb *inp)
1132 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1133 struct inpcbhead *head;
1134 u_int32_t hashkey_faddr;
1136 INP_INFO_WLOCK_ASSERT(pcbinfo);
1137 INP_LOCK_ASSERT(inp);
1140 if (inp->inp_vflag & INP_IPV6)
1141 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
1144 hashkey_faddr = inp->inp_faddr.s_addr;
1146 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
1147 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
1149 LIST_REMOVE(inp, inp_hash);
1150 LIST_INSERT_HEAD(head, inp, inp_hash);
1154 * Remove PCB from various lists.
1157 in_pcbremlists(struct inpcb *inp)
1159 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1161 INP_INFO_WLOCK_ASSERT(pcbinfo);
1162 INP_LOCK_ASSERT(inp);
1164 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
1165 if (inp->inp_lport) {
1166 struct inpcbport *phd = inp->inp_phd;
1168 LIST_REMOVE(inp, inp_hash);
1169 LIST_REMOVE(inp, inp_portlist);
1170 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1171 LIST_REMOVE(phd, phd_hash);
1175 LIST_REMOVE(inp, inp_list);
1176 pcbinfo->ipi_count--;
1180 * A set label operation has occurred at the socket layer, propagate the
1181 * label change into the in_pcb for the socket.
1184 in_pcbsosetlabel(struct socket *so)
1189 inp = sotoinpcb(so);
1190 KASSERT(inp != NULL, ("in_pcbsosetlabel: so->so_pcb == NULL"));
1194 mac_inpcb_sosetlabel(so, inp);
1201 * ipport_tick runs once per second, determining if random port allocation
1202 * should be continued. If more than ipport_randomcps ports have been
1203 * allocated in the last second, then we return to sequential port
1204 * allocation. We return to random allocation only once we drop below
1205 * ipport_randomcps for at least ipport_randomtime seconds.
1208 ipport_tick(void *xtp)
1211 if (ipport_tcpallocs <= ipport_tcplastcount + ipport_randomcps) {
1212 if (ipport_stoprandom > 0)
1213 ipport_stoprandom--;
1215 ipport_stoprandom = ipport_randomtime;
1216 ipport_tcplastcount = ipport_tcpallocs;
1217 callout_reset(&ipport_tick_callout, hz, ipport_tick, NULL);
1222 db_print_indent(int indent)
1226 for (i = 0; i < indent; i++)
1231 db_print_inconninfo(struct in_conninfo *inc, const char *name, int indent)
1233 char faddr_str[48], laddr_str[48];
1235 db_print_indent(indent);
1236 db_printf("%s at %p\n", name, inc);
1241 if (inc->inc_flags == 1) {
1243 ip6_sprintf(laddr_str, &inc->inc6_laddr);
1244 ip6_sprintf(faddr_str, &inc->inc6_faddr);
1248 inet_ntoa_r(inc->inc_laddr, laddr_str);
1249 inet_ntoa_r(inc->inc_faddr, faddr_str);
1253 db_print_indent(indent);
1254 db_printf("inc_laddr %s inc_lport %u\n", laddr_str,
1255 ntohs(inc->inc_lport));
1256 db_print_indent(indent);
1257 db_printf("inc_faddr %s inc_fport %u\n", faddr_str,
1258 ntohs(inc->inc_fport));
1262 db_print_inpflags(int inp_flags)
1267 if (inp_flags & INP_RECVOPTS) {
1268 db_printf("%sINP_RECVOPTS", comma ? ", " : "");
1271 if (inp_flags & INP_RECVRETOPTS) {
1272 db_printf("%sINP_RECVRETOPTS", comma ? ", " : "");
1275 if (inp_flags & INP_RECVDSTADDR) {
1276 db_printf("%sINP_RECVDSTADDR", comma ? ", " : "");
1279 if (inp_flags & INP_HDRINCL) {
1280 db_printf("%sINP_HDRINCL", comma ? ", " : "");
1283 if (inp_flags & INP_HIGHPORT) {
1284 db_printf("%sINP_HIGHPORT", comma ? ", " : "");
1287 if (inp_flags & INP_LOWPORT) {
1288 db_printf("%sINP_LOWPORT", comma ? ", " : "");
1291 if (inp_flags & INP_ANONPORT) {
1292 db_printf("%sINP_ANONPORT", comma ? ", " : "");
1295 if (inp_flags & INP_RECVIF) {
1296 db_printf("%sINP_RECVIF", comma ? ", " : "");
1299 if (inp_flags & INP_MTUDISC) {
1300 db_printf("%sINP_MTUDISC", comma ? ", " : "");
1303 if (inp_flags & INP_FAITH) {
1304 db_printf("%sINP_FAITH", comma ? ", " : "");
1307 if (inp_flags & INP_RECVTTL) {
1308 db_printf("%sINP_RECVTTL", comma ? ", " : "");
1311 if (inp_flags & INP_DONTFRAG) {
1312 db_printf("%sINP_DONTFRAG", comma ? ", " : "");
1315 if (inp_flags & IN6P_IPV6_V6ONLY) {
1316 db_printf("%sIN6P_IPV6_V6ONLY", comma ? ", " : "");
1319 if (inp_flags & IN6P_PKTINFO) {
1320 db_printf("%sIN6P_PKTINFO", comma ? ", " : "");
1323 if (inp_flags & IN6P_HOPLIMIT) {
1324 db_printf("%sIN6P_HOPLIMIT", comma ? ", " : "");
1327 if (inp_flags & IN6P_HOPOPTS) {
1328 db_printf("%sIN6P_HOPOPTS", comma ? ", " : "");
1331 if (inp_flags & IN6P_DSTOPTS) {
1332 db_printf("%sIN6P_DSTOPTS", comma ? ", " : "");
1335 if (inp_flags & IN6P_RTHDR) {
1336 db_printf("%sIN6P_RTHDR", comma ? ", " : "");
1339 if (inp_flags & IN6P_RTHDRDSTOPTS) {
1340 db_printf("%sIN6P_RTHDRDSTOPTS", comma ? ", " : "");
1343 if (inp_flags & IN6P_TCLASS) {
1344 db_printf("%sIN6P_TCLASS", comma ? ", " : "");
1347 if (inp_flags & IN6P_AUTOFLOWLABEL) {
1348 db_printf("%sIN6P_AUTOFLOWLABEL", comma ? ", " : "");
1351 if (inp_flags & IN6P_RFC2292) {
1352 db_printf("%sIN6P_RFC2292", comma ? ", " : "");
1355 if (inp_flags & IN6P_MTU) {
1356 db_printf("IN6P_MTU%s", comma ? ", " : "");
1362 db_print_inpvflag(u_char inp_vflag)
1367 if (inp_vflag & INP_IPV4) {
1368 db_printf("%sINP_IPV4", comma ? ", " : "");
1371 if (inp_vflag & INP_IPV6) {
1372 db_printf("%sINP_IPV6", comma ? ", " : "");
1375 if (inp_vflag & INP_IPV6PROTO) {
1376 db_printf("%sINP_IPV6PROTO", comma ? ", " : "");
1379 if (inp_vflag & INP_TIMEWAIT) {
1380 db_printf("%sINP_TIMEWAIT", comma ? ", " : "");
1383 if (inp_vflag & INP_ONESBCAST) {
1384 db_printf("%sINP_ONESBCAST", comma ? ", " : "");
1387 if (inp_vflag & INP_DROPPED) {
1388 db_printf("%sINP_DROPPED", comma ? ", " : "");
1391 if (inp_vflag & INP_SOCKREF) {
1392 db_printf("%sINP_SOCKREF", comma ? ", " : "");
1398 db_print_inpcb(struct inpcb *inp, const char *name, int indent)
1401 db_print_indent(indent);
1402 db_printf("%s at %p\n", name, inp);
1406 db_print_indent(indent);
1407 db_printf("inp_flow: 0x%x\n", inp->inp_flow);
1409 db_print_inconninfo(&inp->inp_inc, "inp_conninfo", indent);
1411 db_print_indent(indent);
1412 db_printf("inp_ppcb: %p inp_pcbinfo: %p inp_socket: %p\n",
1413 inp->inp_ppcb, inp->inp_pcbinfo, inp->inp_socket);
1415 db_print_indent(indent);
1416 db_printf("inp_label: %p inp_flags: 0x%x (",
1417 inp->inp_label, inp->inp_flags);
1418 db_print_inpflags(inp->inp_flags);
1421 db_print_indent(indent);
1422 db_printf("inp_sp: %p inp_vflag: 0x%x (", inp->inp_sp,
1424 db_print_inpvflag(inp->inp_vflag);
1427 db_print_indent(indent);
1428 db_printf("inp_ip_ttl: %d inp_ip_p: %d inp_ip_minttl: %d\n",
1429 inp->inp_ip_ttl, inp->inp_ip_p, inp->inp_ip_minttl);
1431 db_print_indent(indent);
1433 if (inp->inp_vflag & INP_IPV6) {
1434 db_printf("in6p_options: %p in6p_outputopts: %p "
1435 "in6p_moptions: %p\n", inp->in6p_options,
1436 inp->in6p_outputopts, inp->in6p_moptions);
1437 db_printf("in6p_icmp6filt: %p in6p_cksum %d "
1438 "in6p_hops %u\n", inp->in6p_icmp6filt, inp->in6p_cksum,
1443 db_printf("inp_ip_tos: %d inp_ip_options: %p "
1444 "inp_ip_moptions: %p\n", inp->inp_ip_tos,
1445 inp->inp_options, inp->inp_moptions);
1448 db_print_indent(indent);
1449 db_printf("inp_phd: %p inp_gencnt: %ju\n", inp->inp_phd,
1450 (uintmax_t)inp->inp_gencnt);
1453 DB_SHOW_COMMAND(inpcb, db_show_inpcb)
1458 db_printf("usage: show inpcb <addr>\n");
1461 inp = (struct inpcb *)addr;
1463 db_print_inpcb(inp, "inpcb", 0);