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if.c (108033) if.c (108172)
1/*
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 17 unchanged lines hidden (view full) ---

26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)if.c 8.5 (Berkeley) 1/9/95
1/*
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)if.c 8.5 (Berkeley) 1/9/95
34 * $FreeBSD: head/sys/net/if.c 108033 2002-12-18 11:46:59Z hsu $
34 * $FreeBSD: head/sys/net/if.c 108172 2002-12-22 05:35:03Z hsu $
35 */
36
37#include "opt_compat.h"
38#include "opt_inet6.h"
39#include "opt_inet.h"
40#include "opt_mac.h"
41
42#include <sys/param.h>

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97 */
98extern void nd6_setmtu(struct ifnet *);
99#endif
100
101int if_index = 0;
102struct ifindex_entry *ifindex_table = NULL;
103int ifqmaxlen = IFQ_MAXLEN;
104struct ifnethead ifnet; /* depend on static init XXX */
35 */
36
37#include "opt_compat.h"
38#include "opt_inet6.h"
39#include "opt_inet.h"
40#include "opt_mac.h"
41
42#include <sys/param.h>

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97 */
98extern void nd6_setmtu(struct ifnet *);
99#endif
100
101int if_index = 0;
102struct ifindex_entry *ifindex_table = NULL;
103int ifqmaxlen = IFQ_MAXLEN;
104struct ifnethead ifnet; /* depend on static init XXX */
105struct mtx ifnet_lock;
105int if_cloners_count;
106LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
107
108static int if_indexlim = 8;
109static struct klist ifklist;
110
111static void filt_netdetach(struct knote *kn);
112static int filt_netdev(struct knote *kn, long hint);

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258 * parameters.
259 */
260/* ARGSUSED*/
261static void
262if_init(dummy)
263 void *dummy;
264{
265
106int if_cloners_count;
107LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
108
109static int if_indexlim = 8;
110static struct klist ifklist;
111
112static void filt_netdetach(struct knote *kn);
113static int filt_netdev(struct knote *kn, long hint);

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259 * parameters.
260 */
261/* ARGSUSED*/
262static void
263if_init(dummy)
264 void *dummy;
265{
266
267 IFNET_LOCK_INIT();
266 TAILQ_INIT(&ifnet);
267 SLIST_INIT(&ifklist);
268 if_grow(); /* create initial table */
269 ifdev_byindex(0) = make_dev(&net_cdevsw, 0,
270 UID_ROOT, GID_WHEEL, 0600, "network");
271}
272
273static void

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290static void
291if_check(dummy)
292 void *dummy;
293{
294 struct ifnet *ifp;
295 int s;
296
297 s = splimp();
268 TAILQ_INIT(&ifnet);
269 SLIST_INIT(&ifklist);
270 if_grow(); /* create initial table */
271 ifdev_byindex(0) = make_dev(&net_cdevsw, 0,
272 UID_ROOT, GID_WHEEL, 0600, "network");
273}
274
275static void

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292static void
293if_check(dummy)
294 void *dummy;
295{
296 struct ifnet *ifp;
297 int s;
298
299 s = splimp();
300 IFNET_RLOCK(); /* could sleep on rare error; mostly okay XXX */
298 TAILQ_FOREACH(ifp, &ifnet, if_link) {
299 if (ifp->if_snd.ifq_maxlen == 0) {
300 printf("%s%d XXX: driver didn't set ifq_maxlen\n",
301 ifp->if_name, ifp->if_unit);
302 ifp->if_snd.ifq_maxlen = ifqmaxlen;
303 }
304 if (!mtx_initialized(&ifp->if_snd.ifq_mtx)) {
305 printf("%s%d XXX: driver didn't initialize queue mtx\n",
306 ifp->if_name, ifp->if_unit);
307 mtx_init(&ifp->if_snd.ifq_mtx, "unknown",
308 MTX_NETWORK_LOCK, MTX_DEF);
309 }
310 }
301 TAILQ_FOREACH(ifp, &ifnet, if_link) {
302 if (ifp->if_snd.ifq_maxlen == 0) {
303 printf("%s%d XXX: driver didn't set ifq_maxlen\n",
304 ifp->if_name, ifp->if_unit);
305 ifp->if_snd.ifq_maxlen = ifqmaxlen;
306 }
307 if (!mtx_initialized(&ifp->if_snd.ifq_mtx)) {
308 printf("%s%d XXX: driver didn't initialize queue mtx\n",
309 ifp->if_name, ifp->if_unit);
310 mtx_init(&ifp->if_snd.ifq_mtx, "unknown",
311 MTX_NETWORK_LOCK, MTX_DEF);
312 }
313 }
314 IFNET_RUNLOCK();
311 splx(s);
312 if_slowtimo(0);
313}
314
315static int
316if_findindex(struct ifnet *ifp)
317{
318 int i, unit;

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371 struct ifnet *ifp;
372{
373 unsigned socksize, ifasize;
374 int namelen, masklen;
375 char workbuf[64];
376 register struct sockaddr_dl *sdl;
377 register struct ifaddr *ifa;
378
315 splx(s);
316 if_slowtimo(0);
317}
318
319static int
320if_findindex(struct ifnet *ifp)
321{
322 int i, unit;

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375 struct ifnet *ifp;
376{
377 unsigned socksize, ifasize;
378 int namelen, masklen;
379 char workbuf[64];
380 register struct sockaddr_dl *sdl;
381 register struct ifaddr *ifa;
382
383 IFNET_WLOCK();
379 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
384 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
385 IFNET_WUNLOCK();
380 /*
381 * XXX -
382 * The old code would work if the interface passed a pre-existing
383 * chain of ifaddrs to this code. We don't trust our callers to
384 * properly initialize the tailq, however, so we no longer allow
385 * this unlikely case.
386 */
387 TAILQ_INIT(&ifp->if_addrhead);

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532
533 /* Announce that the interface is gone. */
534 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
535
536#ifdef MAC
537 mac_destroy_ifnet(ifp);
538#endif /* MAC */
539 KNOTE(&ifp->if_klist, NOTE_EXIT);
386 /*
387 * XXX -
388 * The old code would work if the interface passed a pre-existing
389 * chain of ifaddrs to this code. We don't trust our callers to
390 * properly initialize the tailq, however, so we no longer allow
391 * this unlikely case.
392 */
393 TAILQ_INIT(&ifp->if_addrhead);

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538
539 /* Announce that the interface is gone. */
540 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
541
542#ifdef MAC
543 mac_destroy_ifnet(ifp);
544#endif /* MAC */
545 KNOTE(&ifp->if_klist, NOTE_EXIT);
546 IFNET_WLOCK();
540 TAILQ_REMOVE(&ifnet, ifp, if_link);
547 TAILQ_REMOVE(&ifnet, ifp, if_link);
548 IFNET_WUNLOCK();
541 mtx_destroy(&ifp->if_snd.ifq_mtx);
542 splx(s);
543}
544
545/*
546 * Delete Routes for a Network Interface
547 *
548 * Called for each routing entry via the rnh->rnh_walktree() call above

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841/*ARGSUSED*/
842struct ifaddr *
843ifa_ifwithaddr(addr)
844 struct sockaddr *addr;
845{
846 struct ifnet *ifp;
847 struct ifaddr *ifa;
848
549 mtx_destroy(&ifp->if_snd.ifq_mtx);
550 splx(s);
551}
552
553/*
554 * Delete Routes for a Network Interface
555 *
556 * Called for each routing entry via the rnh->rnh_walktree() call above

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849/*ARGSUSED*/
850struct ifaddr *
851ifa_ifwithaddr(addr)
852 struct sockaddr *addr;
853{
854 struct ifnet *ifp;
855 struct ifaddr *ifa;
856
857 IFNET_RLOCK();
849 TAILQ_FOREACH(ifp, &ifnet, if_link)
850 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
851 if (ifa->ifa_addr->sa_family != addr->sa_family)
852 continue;
853 if (equal(addr, ifa->ifa_addr))
854 goto done;
855 /* IP6 doesn't have broadcast */
856 if ((ifp->if_flags & IFF_BROADCAST) &&
857 ifa->ifa_broadaddr &&
858 ifa->ifa_broadaddr->sa_len != 0 &&
859 equal(ifa->ifa_broadaddr, addr))
860 goto done;
861 }
862 ifa = NULL;
863done:
858 TAILQ_FOREACH(ifp, &ifnet, if_link)
859 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
860 if (ifa->ifa_addr->sa_family != addr->sa_family)
861 continue;
862 if (equal(addr, ifa->ifa_addr))
863 goto done;
864 /* IP6 doesn't have broadcast */
865 if ((ifp->if_flags & IFF_BROADCAST) &&
866 ifa->ifa_broadaddr &&
867 ifa->ifa_broadaddr->sa_len != 0 &&
868 equal(ifa->ifa_broadaddr, addr))
869 goto done;
870 }
871 ifa = NULL;
872done:
873 IFNET_RUNLOCK();
864 return (ifa);
865}
866
867/*
868 * Locate the point to point interface with a given destination address.
869 */
870/*ARGSUSED*/
871struct ifaddr *
872ifa_ifwithdstaddr(addr)
873 struct sockaddr *addr;
874{
875 struct ifnet *ifp;
876 struct ifaddr *ifa;
877
874 return (ifa);
875}
876
877/*
878 * Locate the point to point interface with a given destination address.
879 */
880/*ARGSUSED*/
881struct ifaddr *
882ifa_ifwithdstaddr(addr)
883 struct sockaddr *addr;
884{
885 struct ifnet *ifp;
886 struct ifaddr *ifa;
887
888 IFNET_RLOCK();
878 TAILQ_FOREACH(ifp, &ifnet, if_link) {
879 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
880 continue;
881 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
882 if (ifa->ifa_addr->sa_family != addr->sa_family)
883 continue;
884 if (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr))
885 goto done;
886 }
887 }
888 ifa = NULL;
889done:
889 TAILQ_FOREACH(ifp, &ifnet, if_link) {
890 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
891 continue;
892 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
893 if (ifa->ifa_addr->sa_family != addr->sa_family)
894 continue;
895 if (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr))
896 goto done;
897 }
898 }
899 ifa = NULL;
900done:
901 IFNET_RUNLOCK();
890 return (ifa);
891}
892
893/*
894 * Find an interface on a specific network. If many, choice
895 * is most specific found.
896 */
897struct ifaddr *

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913 if (sdl->sdl_index && sdl->sdl_index <= if_index)
914 return (ifaddr_byindex(sdl->sdl_index));
915 }
916
917 /*
918 * Scan though each interface, looking for ones that have
919 * addresses in this address family.
920 */
902 return (ifa);
903}
904
905/*
906 * Find an interface on a specific network. If many, choice
907 * is most specific found.
908 */
909struct ifaddr *

--- 15 unchanged lines hidden (view full) ---

925 if (sdl->sdl_index && sdl->sdl_index <= if_index)
926 return (ifaddr_byindex(sdl->sdl_index));
927 }
928
929 /*
930 * Scan though each interface, looking for ones that have
931 * addresses in this address family.
932 */
933 IFNET_RLOCK();
921 TAILQ_FOREACH(ifp, &ifnet, if_link) {
922 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
923 register char *cp, *cp2, *cp3;
924
925 if (ifa->ifa_addr->sa_family != af)
926next: continue;
927 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
928 /*

--- 46 unchanged lines hidden (view full) ---

975 rn_refines((caddr_t)ifa->ifa_netmask,
976 (caddr_t)ifa_maybe->ifa_netmask))
977 ifa_maybe = ifa;
978 }
979 }
980 }
981 ifa = ifa_maybe;
982done:
934 TAILQ_FOREACH(ifp, &ifnet, if_link) {
935 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
936 register char *cp, *cp2, *cp3;
937
938 if (ifa->ifa_addr->sa_family != af)
939next: continue;
940 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
941 /*

--- 46 unchanged lines hidden (view full) ---

988 rn_refines((caddr_t)ifa->ifa_netmask,
989 (caddr_t)ifa_maybe->ifa_netmask))
990 ifa_maybe = ifa;
991 }
992 }
993 }
994 ifa = ifa_maybe;
995done:
996 IFNET_RUNLOCK();
983 return (ifa);
984}
985
986/*
987 * Find an interface address specific to an interface best matching
988 * a given address.
989 */
990struct ifaddr *

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1157 */
1158static void
1159if_slowtimo(arg)
1160 void *arg;
1161{
1162 register struct ifnet *ifp;
1163 int s = splimp();
1164
997 return (ifa);
998}
999
1000/*
1001 * Find an interface address specific to an interface best matching
1002 * a given address.
1003 */
1004struct ifaddr *

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1171 */
1172static void
1173if_slowtimo(arg)
1174 void *arg;
1175{
1176 register struct ifnet *ifp;
1177 int s = splimp();
1178
1179 IFNET_RLOCK();
1165 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1166 if (ifp->if_timer == 0 || --ifp->if_timer)
1167 continue;
1168 if (ifp->if_watchdog)
1169 (*ifp->if_watchdog)(ifp);
1170 }
1180 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1181 if (ifp->if_timer == 0 || --ifp->if_timer)
1182 continue;
1183 if (ifp->if_watchdog)
1184 (*ifp->if_watchdog)(ifp);
1185 }
1186 IFNET_RUNLOCK();
1171 splx(s);
1172 timeout(if_slowtimo, (void *)0, hz / IFNET_SLOWHZ);
1173}
1174
1175/*
1176 * Map interface name to
1177 * interface structure pointer.
1178 */

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1187 * Now search all the interfaces for this name/number
1188 */
1189
1190 /*
1191 * XXX
1192 * Devices should really be known as /dev/fooN, not /dev/net/fooN.
1193 */
1194 snprintf(namebuf, IFNAMSIZ, "%s/%s", net_cdevsw.d_name, name);
1187 splx(s);
1188 timeout(if_slowtimo, (void *)0, hz / IFNET_SLOWHZ);
1189}
1190
1191/*
1192 * Map interface name to
1193 * interface structure pointer.
1194 */

--- 8 unchanged lines hidden (view full) ---

1203 * Now search all the interfaces for this name/number
1204 */
1205
1206 /*
1207 * XXX
1208 * Devices should really be known as /dev/fooN, not /dev/net/fooN.
1209 */
1210 snprintf(namebuf, IFNAMSIZ, "%s/%s", net_cdevsw.d_name, name);
1211 IFNET_RLOCK();
1195 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1196 dev = ifdev_byindex(ifp->if_index);
1197 if (strcmp(devtoname(dev), namebuf) == 0)
1198 break;
1199 if (dev_named(dev, name))
1200 break;
1201 }
1212 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1213 dev = ifdev_byindex(ifp->if_index);
1214 if (strcmp(devtoname(dev), namebuf) == 0)
1215 break;
1216 if (dev_named(dev, name))
1217 break;
1218 }
1219 IFNET_RUNLOCK();
1202 return (ifp);
1203}
1204
1205/*
1206 * Map interface name in a sockaddr_dl to
1207 * interface structure pointer.
1208 */
1209struct ifnet *

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1620{
1621 struct ifconf *ifc = (struct ifconf *)data;
1622 struct ifnet *ifp;
1623 struct ifaddr *ifa;
1624 struct ifreq ifr, *ifrp;
1625 int space = ifc->ifc_len, error = 0;
1626
1627 ifrp = ifc->ifc_req;
1220 return (ifp);
1221}
1222
1223/*
1224 * Map interface name in a sockaddr_dl to
1225 * interface structure pointer.
1226 */
1227struct ifnet *

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1638{
1639 struct ifconf *ifc = (struct ifconf *)data;
1640 struct ifnet *ifp;
1641 struct ifaddr *ifa;
1642 struct ifreq ifr, *ifrp;
1643 int space = ifc->ifc_len, error = 0;
1644
1645 ifrp = ifc->ifc_req;
1646 IFNET_RLOCK(); /* could sleep XXX */
1628 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1629 char workbuf[64];
1630 int ifnlen, addrs;
1631
1632 if (space < sizeof(ifr))
1633 break;
1634 ifnlen = snprintf(workbuf, sizeof(workbuf),
1635 "%s%d", ifp->if_name, ifp->if_unit);

--- 54 unchanged lines hidden (view full) ---

1690 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1691 sizeof (ifr));
1692 if (error)
1693 break;
1694 space -= sizeof (ifr);
1695 ifrp++;
1696 }
1697 }
1647 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1648 char workbuf[64];
1649 int ifnlen, addrs;
1650
1651 if (space < sizeof(ifr))
1652 break;
1653 ifnlen = snprintf(workbuf, sizeof(workbuf),
1654 "%s%d", ifp->if_name, ifp->if_unit);

--- 54 unchanged lines hidden (view full) ---

1709 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1710 sizeof (ifr));
1711 if (error)
1712 break;
1713 space -= sizeof (ifr);
1714 ifrp++;
1715 }
1716 }
1717 IFNET_RUNLOCK();
1698 ifc->ifc_len -= space;
1699 return (error);
1700}
1701
1702/*
1703 * Just like if_promisc(), but for all-multicast-reception mode.
1704 */
1705int

--- 288 unchanged lines hidden --- 		1718 ifc->ifc_len -= space;
1719 return (error);
1720}
1721
1722/*
1723 * Just like if_promisc(), but for all-multicast-reception mode.
1724 */
1725int

--- 288 unchanged lines hidden ---