2 * Copyright (c) 2001-2003
3 * Fraunhofer Institute for Open Communication Systems (FhG Fokus).
6 * Author: Harti Brandt <harti@freebsd.org>
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.
17 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $Begemot: mibII.c 516 2006-10-27 15:54:02Z brandt_h $
31 * Implementation of the standard interfaces and ip MIB.
34 #include "mibII_oid.h"
36 #include <net/if_types.h>
39 /*****************************/
42 static struct lmodule *module;
46 static void *route_fd;
48 /* if-index allocator */
49 static uint32_t next_if_index = 1;
51 /* currently fetching the arp table */
52 static int in_update_arp;
54 /* OR registrations */
55 static u_int ifmib_reg;
56 static u_int ipmib_reg;
57 static u_int tcpmib_reg;
58 static u_int udpmib_reg;
59 static u_int ipForward_reg;
61 /*****************************/
63 /* list of all IP addresses */
64 struct mibifa_list mibifa_list = TAILQ_HEAD_INITIALIZER(mibifa_list);
66 /* list of all interfaces */
67 struct mibif_list mibif_list = TAILQ_HEAD_INITIALIZER(mibif_list);
69 /* list of dynamic interface names */
70 struct mibdynif_list mibdynif_list = SLIST_HEAD_INITIALIZER(mibdynif_list);
72 /* list of all interface index mappings */
73 struct mibindexmap_list mibindexmap_list = STAILQ_HEAD_INITIALIZER(mibindexmap_list);
75 /* list of all stacking entries */
76 struct mibifstack_list mibifstack_list = TAILQ_HEAD_INITIALIZER(mibifstack_list);
78 /* list of all receive addresses */
79 struct mibrcvaddr_list mibrcvaddr_list = TAILQ_HEAD_INITIALIZER(mibrcvaddr_list);
81 /* list of all NetToMedia entries */
82 struct mibarp_list mibarp_list = TAILQ_HEAD_INITIALIZER(mibarp_list);
84 /* number of interfaces */
85 int32_t mib_if_number;
87 /* last change of table */
88 uint64_t mib_iftable_last_change;
90 /* last change of stack table */
91 uint64_t mib_ifstack_last_change;
93 /* if this is set, one of our lists may be bad. refresh them when idle */
99 /* last time refreshed */
100 uint64_t mibarpticks;
102 /* info on system clocks */
103 struct clockinfo clockinfo;
105 /* list of all New if registrations */
106 static struct newifreg_list newifreg_list = TAILQ_HEAD_INITIALIZER(newifreg_list);
108 /* baud rate of fastest interface */
109 uint64_t mibif_maxspeed;
111 /* user-forced update interval */
112 u_int mibif_force_hc_update_interval;
114 /* current update interval */
115 u_int mibif_hc_update_interval;
117 /* HC update timer handle */
118 static void *hc_update_timer;
120 /* Idle poll timer */
121 static void *mibII_poll_timer;
123 /* interfaces' data poll interval */
124 u_int mibII_poll_ticks;
127 static void mibII_idle(void *arg __unused);
129 /*****************************/
131 static const struct asn_oid oid_ifMIB = OIDX_ifMIB;
132 static const struct asn_oid oid_ipMIB = OIDX_ipMIB;
133 static const struct asn_oid oid_tcpMIB = OIDX_tcpMIB;
134 static const struct asn_oid oid_udpMIB = OIDX_udpMIB;
135 static const struct asn_oid oid_ipForward = OIDX_ipForward;
136 static const struct asn_oid oid_linkDown = OIDX_linkDown;
137 static const struct asn_oid oid_linkUp = OIDX_linkUp;
138 static const struct asn_oid oid_ifIndex = OIDX_ifIndex;
140 /*****************************/
146 mib_find_if(u_int idx)
150 TAILQ_FOREACH(ifp, &mibif_list, link)
151 if (ifp->index == idx)
157 mib_find_if_sys(u_int sysindex)
161 TAILQ_FOREACH(ifp, &mibif_list, link)
162 if (ifp->sysindex == sysindex)
168 mib_find_if_name(const char *name)
172 TAILQ_FOREACH(ifp, &mibif_list, link)
173 if (strcmp(ifp->name, name) == 0)
179 * Check whether an interface is dynamic. The argument may include the
180 * unit number. This assumes, that the name part does NOT contain digits.
183 mib_if_is_dyn(const char *name)
188 for (len = 0; name[len] != '\0' && isalpha(name[len]) ; len++)
190 SLIST_FOREACH(d, &mibdynif_list, link)
191 if (strlen(d->name) == len && strncmp(d->name, name, len) == 0)
196 /* set an interface name to dynamic mode */
198 mib_if_set_dyn(const char *name)
202 SLIST_FOREACH(d, &mibdynif_list, link)
203 if (strcmp(name, d->name) == 0)
205 if ((d = malloc(sizeof(*d))) == NULL)
207 strlcpy(d->name, name, sizeof(d->name));
208 SLIST_INSERT_HEAD(&mibdynif_list, d, link);
212 * register for interface creations
215 mib_register_newif(int (*func)(struct mibif *), const struct lmodule *mod)
217 struct newifreg *reg;
219 TAILQ_FOREACH(reg, &newifreg_list, link)
220 if (reg->mod == mod) {
224 if ((reg = malloc(sizeof(*reg))) == NULL) {
225 syslog(LOG_ERR, "newifreg: %m");
230 TAILQ_INSERT_TAIL(&newifreg_list, reg, link);
236 mib_unregister_newif(const struct lmodule *mod)
238 struct newifreg *reg;
240 TAILQ_FOREACH(reg, &newifreg_list, link)
241 if (reg->mod == mod) {
242 TAILQ_REMOVE(&newifreg_list, reg, link);
252 return (TAILQ_FIRST(&mibif_list));
255 mib_next_if(const struct mibif *ifp)
257 return (TAILQ_NEXT(ifp, link));
261 * Change the admin status of an interface
264 mib_if_admin(struct mibif *ifp, int up)
268 strlcpy(ifr.ifr_name, ifp->name, sizeof(ifr.ifr_name));
269 if (ioctl(mib_netsock, SIOCGIFFLAGS, &ifr) == -1) {
270 syslog(LOG_ERR, "SIOCGIFFLAGS(%s): %m", ifp->name);
274 ifr.ifr_flags |= IFF_UP;
276 ifr.ifr_flags &= ~IFF_UP;
277 if (ioctl(mib_netsock, SIOCSIFFLAGS, &ifr) == -1) {
278 syslog(LOG_ERR, "SIOCSIFFLAGS(%s): %m", ifp->name);
282 (void)mib_fetch_ifmib(ifp);
288 * Generate a link up/down trap
291 link_trap(struct mibif *ifp, int up)
293 struct snmp_value ifindex;
295 ifindex.var = oid_ifIndex;
296 ifindex.var.subs[ifindex.var.len++] = ifp->index;
297 ifindex.syntax = SNMP_SYNTAX_INTEGER;
298 ifindex.v.integer = ifp->index;
300 snmp_send_trap(up ? &oid_linkUp : &oid_linkDown, &ifindex,
301 (struct snmp_value *)NULL);
305 * Fetch the GENERIC IFMIB and update the HC counters
308 fetch_generic_mib(struct mibif *ifp, const struct ifmibdata *old)
312 struct mibif_private *p = ifp->private;
316 name[2] = NETLINK_GENERIC;
317 name[3] = IFMIB_IFDATA;
318 name[4] = ifp->sysindex;
319 name[5] = IFDATA_GENERAL;
321 len = sizeof(ifp->mib);
322 if (sysctl(name, nitems(name), &ifp->mib, &len, NULL, 0) == -1) {
324 syslog(LOG_WARNING, "sysctl(ifmib, %s) failed %m",
330 * Assume that one of the two following compounds is optimized away
332 if (ULONG_MAX >= 0xffffffffffffffffULL) {
333 p->hc_inoctets = ifp->mib.ifmd_data.ifi_ibytes;
334 p->hc_outoctets = ifp->mib.ifmd_data.ifi_obytes;
335 p->hc_omcasts = ifp->mib.ifmd_data.ifi_omcasts;
336 p->hc_opackets = ifp->mib.ifmd_data.ifi_opackets;
337 p->hc_imcasts = ifp->mib.ifmd_data.ifi_imcasts;
338 p->hc_ipackets = ifp->mib.ifmd_data.ifi_ipackets;
340 } else if (ULONG_MAX >= 0xffffffff) {
342 #define UPDATE(HC, MIB) \
343 if (old->ifmd_data.MIB > ifp->mib.ifmd_data.MIB) \
344 p->HC += (0x100000000ULL + \
345 ifp->mib.ifmd_data.MIB) - \
346 old->ifmd_data.MIB; \
348 p->HC += ifp->mib.ifmd_data.MIB - \
351 UPDATE(hc_inoctets, ifi_ibytes)
352 UPDATE(hc_outoctets, ifi_obytes)
353 UPDATE(hc_omcasts, ifi_omcasts)
354 UPDATE(hc_opackets, ifi_opackets)
355 UPDATE(hc_imcasts, ifi_imcasts)
356 UPDATE(hc_ipackets, ifi_ipackets)
365 * Update the 64-bit interface counters
368 update_hc_counters(void *arg __unused)
371 struct ifmibdata oldmib;
373 TAILQ_FOREACH(ifp, &mibif_list, link) {
375 (void)fetch_generic_mib(ifp, &oldmib);
380 * Recompute the poll timer for the HC counters
383 mibif_reset_hc_timer(void)
387 if ((ticks = mibif_force_hc_update_interval) == 0) {
388 if (mibif_maxspeed <= IF_Mbps(10)) {
389 /* at 10Mbps overflow needs 3436 seconds */
390 ticks = 3000 * 100; /* 50 minutes */
391 } else if (mibif_maxspeed <= IF_Mbps(100)) {
392 /* at 100Mbps overflow needs 343 seconds */
393 ticks = 300 * 100; /* 5 minutes */
394 } else if (mibif_maxspeed < IF_Mbps(622)) {
395 /* at 622Mbps overflow needs 53 seconds */
396 ticks = 40 * 100; /* 40 seconds */
397 } else if (mibif_maxspeed <= IF_Mbps(1000)) {
398 /* at 1Gbps overflow needs 34 seconds */
399 ticks = 20 * 100; /* 20 seconds */
401 /* at 10Gbps overflow needs 3.4 seconds */
402 ticks = 100; /* 1 seconds */
406 if (ticks == mibif_hc_update_interval)
409 if (hc_update_timer != NULL) {
410 timer_stop(hc_update_timer);
411 hc_update_timer = NULL;
413 update_hc_counters(NULL);
414 if ((hc_update_timer = timer_start_repeat(ticks, ticks,
415 update_hc_counters, NULL, module)) == NULL) {
416 syslog(LOG_ERR, "timer_start(%u): %m", ticks);
419 mibif_hc_update_interval = ticks;
423 * Restart the idle poll timer.
426 mibif_restart_mibII_poll_timer(void)
428 if (mibII_poll_timer != NULL)
429 timer_stop(mibII_poll_timer);
431 if ((mibII_poll_timer = timer_start_repeat(mibII_poll_ticks * 10,
432 mibII_poll_ticks * 10, mibII_idle, NULL, module)) == NULL)
433 syslog(LOG_ERR, "timer_start(%u): %m", mibII_poll_ticks);
437 * Fetch new MIB data.
440 mib_fetch_ifmib(struct mibif *ifp)
442 static int kmib[2] = { -1, 0 }; /* for sysctl net.ifdescr_maxlen */
445 size_t kmiblen = nitems(kmib);
448 struct ifmibdata oldmib = ifp->mib;
450 u_int alias_maxlen = MIBIF_ALIAS_SIZE_MAX;
452 if (fetch_generic_mib(ifp, &oldmib) == -1)
456 * Quoting RFC2863, 3.1.15: "... LinkUp and linkDown traps are
457 * generated just after ifOperStatus leaves, or just before it
458 * enters, the down state, respectively;"
460 if (ifp->trap_enable && ifp->mib.ifmd_data.ifi_link_state !=
461 oldmib.ifmd_data.ifi_link_state &&
462 (ifp->mib.ifmd_data.ifi_link_state == LINK_STATE_DOWN ||
463 oldmib.ifmd_data.ifi_link_state == LINK_STATE_DOWN))
464 link_trap(ifp, ifp->mib.ifmd_data.ifi_link_state ==
465 LINK_STATE_UP ? 1 : 0);
467 ifp->flags &= ~(MIBIF_HIGHSPEED | MIBIF_VERYHIGHSPEED);
468 if (ifp->mib.ifmd_data.ifi_baudrate > 20000000) {
469 ifp->flags |= MIBIF_HIGHSPEED;
470 if (ifp->mib.ifmd_data.ifi_baudrate > 650000000)
471 ifp->flags |= MIBIF_VERYHIGHSPEED;
473 if (ifp->mib.ifmd_data.ifi_baudrate > mibif_maxspeed) {
474 mibif_maxspeed = ifp->mib.ifmd_data.ifi_baudrate;
475 mibif_reset_hc_timer();
483 name[2] = NETLINK_GENERIC;
484 name[3] = IFMIB_IFDATA;
485 name[4] = ifp->sysindex;
486 name[5] = IFDATA_LINKSPECIFIC;
487 if (sysctl(name, nitems(name), NULL, &len, NULL, 0) == -1) {
488 syslog(LOG_WARNING, "sysctl linkmib estimate (%s): %m",
490 if (ifp->specmib != NULL) {
497 if (ifp->specmib != NULL) {
504 if (ifp->specmiblen != len) {
505 if ((newmib = realloc(ifp->specmib, len)) == NULL) {
510 ifp->specmib = newmib;
511 ifp->specmiblen = len;
513 if (sysctl(name, nitems(name), ifp->specmib, &len, NULL, 0) == -1) {
514 syslog(LOG_WARNING, "sysctl linkmib (%s): %m", ifp->name);
515 if (ifp->specmib != NULL) {
523 * Find sysctl mib for net.ifdescr_maxlen (one time).
524 * kmib[0] == -1 at first call to mib_fetch_ifmib().
525 * Then kmib[0] > 0 if we found sysctl mib for net.ifdescr_maxlen.
526 * Else, kmib[0] == 0 (unexpected error from a kernel).
529 sysctlnametomib("net.ifdescr_maxlen", kmib, &kmiblen) < 0) {
531 syslog(LOG_WARNING, "sysctlnametomib net.ifdescr_maxlen: %m");
535 * Fetch net.ifdescr_maxlen value every time to catch up with changes.
537 len = sizeof(alias_maxlen);
538 if (kmib[0] > 0 && sysctl(kmib, 2, &alias_maxlen, &len, NULL, 0) < 0) {
539 /* unexpected error from the kernel, use default value */
540 alias_maxlen = MIBIF_ALIAS_SIZE_MAX;
541 syslog(LOG_WARNING, "sysctl net.ifdescr_maxlen: %m");
545 * Kernel limit might be decreased after interfaces got
546 * their descriptions assigned. Try to obtain them anyway.
548 if (alias_maxlen == 0)
549 alias_maxlen = MIBIF_ALIAS_SIZE_MAX;
552 * Allocate maximum memory for a buffer and later reallocate
553 * to free extra memory.
555 if ((ifp->alias = malloc(alias_maxlen)) == NULL) {
556 syslog(LOG_WARNING, "malloc(%d) failed: %m", (int)alias_maxlen);
560 strlcpy(irr.ifr_name, ifp->name, sizeof(irr.ifr_name));
561 irr.ifr_buffer.buffer = ifp->alias;
562 irr.ifr_buffer.length = alias_maxlen;
563 if (ioctl(mib_netsock, SIOCGIFDESCR, &irr) == -1) {
567 syslog(LOG_WARNING, "SIOCGIFDESCR (%s): %m", ifp->name);
568 } else if (irr.ifr_buffer.buffer == NULL) {
571 syslog(LOG_WARNING, "SIOCGIFDESCR (%s): too long (%zu)",
572 ifp->name, irr.ifr_buffer.length);
574 ifp->alias_size = strnlen(ifp->alias, alias_maxlen) + 1;
576 if (ifp->alias_size > MIBIF_ALIAS_SIZE)
577 ifp->alias_size = MIBIF_ALIAS_SIZE;
579 if (ifp->alias_size < alias_maxlen)
580 ifp->alias = realloc(ifp->alias, ifp->alias_size);
584 ifp->mibtick = get_ticks();
588 /* find first/next address for a given interface */
590 mib_first_ififa(const struct mibif *ifp)
594 TAILQ_FOREACH(ifa, &mibifa_list, link)
595 if (ifp->index == ifa->ifindex)
601 mib_next_ififa(struct mibifa *ifa0)
606 while ((ifa = TAILQ_NEXT(ifa, link)) != NULL)
607 if (ifa->ifindex == ifa0->ifindex)
615 static struct mibifa *
616 alloc_ifa(u_int ifindex, struct in_addr addr)
621 if ((ifa = malloc(sizeof(struct mibifa))) == NULL) {
622 syslog(LOG_ERR, "ifa: %m");
626 ifa->ifindex = ifindex;
628 ha = ntohl(ifa->inaddr.s_addr);
630 ifa->index.subs[0] = (ha >> 24) & 0xff;
631 ifa->index.subs[1] = (ha >> 16) & 0xff;
632 ifa->index.subs[2] = (ha >> 8) & 0xff;
633 ifa->index.subs[3] = (ha >> 0) & 0xff;
636 ifa->inbcast.s_addr = 0;
637 ifa->inmask.s_addr = 0xffffffff;
639 INSERT_OBJECT_OID(ifa, &mibifa_list);
645 * Delete an interface address
648 destroy_ifa(struct mibifa *ifa)
650 TAILQ_REMOVE(&mibifa_list, ifa, link);
656 * Helper routine to extract the sockaddr structures from a routing
660 mib_extract_addrs(int addrs, u_char *info, struct sockaddr **out)
664 for (i = 0; i < RTAX_MAX; i++) {
665 if ((addrs & (1 << i)) != 0) {
666 *out = (struct sockaddr *)(void *)info;
667 info += roundup((*out)->sa_len, sizeof(long));
675 * save the phys address of an interface. Handle receive address entries here.
678 get_physaddr(struct mibif *ifp, struct sockaddr_dl *sdl, u_char *ptr)
681 struct mibrcvaddr *rcv;
683 if (sdl->sdl_alen == 0) {
685 if (ifp->physaddrlen != 0) {
686 if ((rcv = mib_find_rcvaddr(ifp->index, ifp->physaddr,
687 ifp->physaddrlen)) != NULL)
688 mib_rcvaddr_delete(rcv);
690 ifp->physaddr = NULL;
691 ifp->physaddrlen = 0;
696 if (ifp->physaddrlen != sdl->sdl_alen) {
698 if (ifp->physaddrlen) {
699 /* delete olf receive address */
700 if ((rcv = mib_find_rcvaddr(ifp->index, ifp->physaddr,
701 ifp->physaddrlen)) != NULL)
702 mib_rcvaddr_delete(rcv);
704 if ((np = realloc(ifp->physaddr, sdl->sdl_alen)) == NULL) {
706 ifp->physaddr = NULL;
707 ifp->physaddrlen = 0;
711 ifp->physaddrlen = sdl->sdl_alen;
713 } else if (memcmp(ifp->physaddr, ptr, ifp->physaddrlen) == 0) {
718 /* address changed */
720 /* delete olf receive address */
721 if ((rcv = mib_find_rcvaddr(ifp->index, ifp->physaddr,
722 ifp->physaddrlen)) != NULL)
723 mib_rcvaddr_delete(rcv);
726 memcpy(ifp->physaddr, ptr, ifp->physaddrlen);
728 /* make new receive address */
729 if ((rcv = mib_rcvaddr_create(ifp, ifp->physaddr, ifp->physaddrlen)) != NULL)
730 rcv->flags |= MIBRCVADDR_HW;
737 mibif_free(struct mibif *ifp)
740 struct mibindexmap *map;
741 struct mibifa *ifa, *ifa1;
742 struct mibrcvaddr *rcv, *rcv1;
743 struct mibarp *at, *at1;
745 if (ifp->xnotify != NULL)
746 (*ifp->xnotify)(ifp, MIBIF_NOTIFY_DESTROY, ifp->xnotify_data);
748 (void)mib_ifstack_delete(ifp, NULL);
749 (void)mib_ifstack_delete(NULL, ifp);
751 TAILQ_REMOVE(&mibif_list, ifp, link);
753 /* if this was the fastest interface - recompute this */
754 if (ifp->mib.ifmd_data.ifi_baudrate == mibif_maxspeed) {
755 mibif_maxspeed = ifp->mib.ifmd_data.ifi_baudrate;
756 TAILQ_FOREACH(ifp1, &mibif_list, link)
757 if (ifp1->mib.ifmd_data.ifi_baudrate > mibif_maxspeed)
759 ifp1->mib.ifmd_data.ifi_baudrate;
760 mibif_reset_hc_timer();
763 if (ifp->alias != NULL) {
770 ifp->physaddr = NULL;
774 STAILQ_FOREACH(map, &mibindexmap_list, link)
775 if (map->mibif == ifp) {
780 /* purge interface addresses */
781 ifa = TAILQ_FIRST(&mibifa_list);
782 while (ifa != NULL) {
783 ifa1 = TAILQ_NEXT(ifa, link);
784 if (ifa->ifindex == ifp->index)
789 /* purge receive addresses */
790 rcv = TAILQ_FIRST(&mibrcvaddr_list);
791 while (rcv != NULL) {
792 rcv1 = TAILQ_NEXT(rcv, link);
793 if (rcv->ifindex == ifp->index)
794 mib_rcvaddr_delete(rcv);
798 /* purge ARP entries */
799 at = TAILQ_FIRST(&mibarp_list);
801 at1 = TAILQ_NEXT(at, link);
802 if (at->index.subs[0] == ifp->index)
810 mib_iftable_last_change = this_tick;
814 * Create a new interface
816 static struct mibif *
817 mibif_create(u_int sysindex, const char *name)
820 struct mibindexmap *map;
822 if ((ifp = malloc(sizeof(*ifp))) == NULL) {
823 syslog(LOG_WARNING, "%s: %m", __func__);
826 memset(ifp, 0, sizeof(*ifp));
827 if ((ifp->private = malloc(sizeof(struct mibif_private))) == NULL) {
828 syslog(LOG_WARNING, "%s: %m", __func__);
832 memset(ifp->private, 0, sizeof(struct mibif_private));
834 ifp->sysindex = sysindex;
835 strlcpy(ifp->name, name, sizeof(ifp->name));
836 strlcpy(ifp->descr, name, sizeof(ifp->descr));
837 ifp->spec_oid = oid_zeroDotZero;
840 if (!mib_if_is_dyn(ifp->name)) {
841 /* non-dynamic. look whether we know the interface */
842 STAILQ_FOREACH(map, &mibindexmap_list, link)
843 if (strcmp(map->name, ifp->name) == 0) {
844 ifp->index = map->ifindex;
848 /* assume it has a connector if it is not dynamic */
849 ifp->has_connector = 1;
850 ifp->trap_enable = 1;
853 /* new interface - get new index */
854 if (next_if_index > 0x7fffffff)
855 errx(1, "ifindex wrap");
857 if ((map = malloc(sizeof(*map))) == NULL) {
858 syslog(LOG_ERR, "ifmap: %m");
862 map->ifindex = next_if_index++;
863 map->sysindex = ifp->sysindex;
864 strcpy(map->name, ifp->name);
866 STAILQ_INSERT_TAIL(&mibindexmap_list, map, link);
868 /* re-instantiate. Introduce a counter discontinuity */
869 ifp->counter_disc = get_ticks();
871 ifp->index = map->ifindex;
872 ifp->mib.ifmd_data.ifi_link_state = LINK_STATE_UNKNOWN;
874 INSERT_OBJECT_INT(ifp, &mibif_list);
876 mib_iftable_last_change = this_tick;
878 /* instantiate default ifStack entries */
879 (void)mib_ifstack_create(ifp, NULL);
880 (void)mib_ifstack_create(NULL, ifp);
886 * Inform all interested parties about a new interface
889 notify_newif(struct mibif *ifp)
891 struct newifreg *reg;
893 TAILQ_FOREACH(reg, &newifreg_list, link)
894 if ((*reg->func)(ifp))
899 * This is called for new interfaces after we have fetched the interface
900 * MIB. If this is a broadcast interface try to guess the broadcast address
901 * depending on the interface type.
904 check_llbcast(struct mibif *ifp)
906 static u_char ether_bcast[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
907 struct mibrcvaddr *rcv;
909 if (!(ifp->mib.ifmd_flags & IFF_BROADCAST))
912 switch (ifp->mib.ifmd_data.ifi_type) {
918 if (mib_find_rcvaddr(ifp->index, ether_bcast, 6) == NULL &&
919 (rcv = mib_rcvaddr_create(ifp, ether_bcast, 6)) != NULL)
920 rcv->flags |= MIBRCVADDR_BCAST;
927 * Retrieve the current interface list from the system.
930 mib_refresh_iflist(void)
932 struct mibif *ifp, *ifp1;
937 struct ifmibdata mib;
939 TAILQ_FOREACH(ifp, &mibif_list, link)
940 ifp->flags &= ~MIBIF_FOUND;
943 if (sysctlbyname("net.link.generic.system.ifcount", &count, &len,
945 syslog(LOG_ERR, "ifcount: %m");
950 name[2] = NETLINK_GENERIC;
951 name[3] = IFMIB_IFDATA;
952 name[5] = IFDATA_GENERAL;
953 for (idx = 1; idx <= count; idx++) {
956 if (sysctl(name, nitems(name), &mib, &len, NULL, 0) == -1) {
959 syslog(LOG_ERR, "ifmib(%u): %m", idx);
962 if ((ifp = mib_find_if_sys(idx)) != NULL) {
963 ifp->flags |= MIBIF_FOUND;
966 /* Unknown interface - create */
967 if ((ifp = mibif_create(idx, mib.ifmd_name)) != NULL) {
968 ifp->flags |= MIBIF_FOUND;
969 (void)mib_fetch_ifmib(ifp);
976 * Purge interfaces that disappeared
978 ifp = TAILQ_FIRST(&mibif_list);
979 while (ifp != NULL) {
980 ifp1 = TAILQ_NEXT(ifp, link);
981 if (!(ifp->flags & MIBIF_FOUND))
988 * Find an interface address
991 mib_find_ifa(struct in_addr addr)
995 TAILQ_FOREACH(ifa, &mibifa_list, link)
996 if (ifa->inaddr.s_addr == addr.s_addr)
1002 * Process a new ARP entry
1005 process_arp(const struct rt_msghdr *rtm, const struct sockaddr_dl *sdl,
1006 const struct sockaddr_in *sa)
1011 /* IP arp table entry */
1012 if (sdl->sdl_alen == 0)
1014 if ((ifp = mib_find_if_sys(sdl->sdl_index)) == NULL)
1016 /* have a valid entry */
1017 if ((at = mib_find_arp(ifp, sa->sin_addr)) == NULL &&
1018 (at = mib_arp_create(ifp, sa->sin_addr,
1019 sdl->sdl_data + sdl->sdl_nlen, sdl->sdl_alen)) == NULL)
1022 if (rtm->rtm_rmx.rmx_expire == 0)
1023 at->flags |= MIBARP_PERM;
1025 at->flags &= ~MIBARP_PERM;
1026 at->flags |= MIBARP_FOUND;
1030 * Handle a routing socket message.
1033 handle_rtmsg(struct rt_msghdr *rtm)
1035 struct sockaddr *addrs[RTAX_MAX];
1036 struct if_msghdr *ifm;
1037 struct ifa_msghdr ifam, *ifamp;
1038 struct ifma_msghdr *ifmam;
1039 #ifdef RTM_IFANNOUNCE
1040 struct if_announcemsghdr *ifan;
1043 struct sockaddr_dl *sdl;
1044 struct sockaddr_in *sa;
1046 struct mibrcvaddr *rcv;
1049 if (rtm->rtm_version != RTM_VERSION) {
1050 syslog(LOG_ERR, "Bogus RTM version %u", rtm->rtm_version);
1054 switch (rtm->rtm_type) {
1057 ifamp = (struct ifa_msghdr *)rtm;
1058 memcpy(&ifam, ifamp, sizeof(ifam));
1059 mib_extract_addrs(ifam.ifam_addrs, (u_char *)(ifamp + 1), addrs);
1060 if (addrs[RTAX_IFA] == NULL || addrs[RTAX_NETMASK] == NULL)
1063 sa = (struct sockaddr_in *)(void *)addrs[RTAX_IFA];
1064 if ((ifa = mib_find_ifa(sa->sin_addr)) == NULL) {
1065 /* unknown address */
1066 if ((ifp = mib_find_if_sys(ifam.ifam_index)) == NULL) {
1067 syslog(LOG_WARNING, "RTM_NEWADDR for unknown "
1068 "interface %u", ifam.ifam_index);
1071 if ((ifa = alloc_ifa(ifp->index, sa->sin_addr)) == NULL)
1074 sa = (struct sockaddr_in *)(void *)addrs[RTAX_NETMASK];
1075 ifa->inmask = sa->sin_addr;
1077 if (addrs[RTAX_BRD] != NULL) {
1078 sa = (struct sockaddr_in *)(void *)addrs[RTAX_BRD];
1079 ifa->inbcast = sa->sin_addr;
1081 ifa->flags |= MIBIFA_FOUND;
1085 ifamp = (struct ifa_msghdr *)rtm;
1086 memcpy(&ifam, ifamp, sizeof(ifam));
1087 mib_extract_addrs(ifam.ifam_addrs, (u_char *)(ifamp + 1), addrs);
1088 if (addrs[RTAX_IFA] == NULL)
1091 sa = (struct sockaddr_in *)(void *)addrs[RTAX_IFA];
1092 if ((ifa = mib_find_ifa(sa->sin_addr)) != NULL) {
1093 ifa->flags |= MIBIFA_FOUND;
1094 if (!(ifa->flags & MIBIFA_DESTROYED))
1100 ifmam = (struct ifma_msghdr *)rtm;
1101 mib_extract_addrs(ifmam->ifmam_addrs, (u_char *)(ifmam + 1), addrs);
1102 if (addrs[RTAX_IFA] == NULL ||
1103 addrs[RTAX_IFA]->sa_family != AF_LINK)
1105 sdl = (struct sockaddr_dl *)(void *)addrs[RTAX_IFA];
1106 if ((rcv = mib_find_rcvaddr(sdl->sdl_index,
1107 sdl->sdl_data + sdl->sdl_nlen, sdl->sdl_alen)) == NULL) {
1108 /* unknown address */
1109 if ((ifp = mib_find_if_sys(sdl->sdl_index)) == NULL) {
1110 syslog(LOG_WARNING, "RTM_NEWMADDR for unknown "
1111 "interface %u", sdl->sdl_index);
1114 if ((rcv = mib_rcvaddr_create(ifp,
1115 sdl->sdl_data + sdl->sdl_nlen, sdl->sdl_alen)) == NULL)
1117 rcv->flags |= MIBRCVADDR_VOLATILE;
1119 rcv->flags |= MIBRCVADDR_FOUND;
1123 ifmam = (struct ifma_msghdr *)rtm;
1124 mib_extract_addrs(ifmam->ifmam_addrs, (u_char *)(ifmam + 1), addrs);
1125 if (addrs[RTAX_IFA] == NULL ||
1126 addrs[RTAX_IFA]->sa_family != AF_LINK)
1128 sdl = (struct sockaddr_dl *)(void *)addrs[RTAX_IFA];
1129 if ((rcv = mib_find_rcvaddr(sdl->sdl_index,
1130 sdl->sdl_data + sdl->sdl_nlen, sdl->sdl_alen)) != NULL)
1131 mib_rcvaddr_delete(rcv);
1135 ifm = (struct if_msghdr *)(void *)rtm;
1136 mib_extract_addrs(ifm->ifm_addrs, (u_char *)(ifm + 1), addrs);
1137 if ((ifp = mib_find_if_sys(ifm->ifm_index)) == NULL)
1139 if (addrs[RTAX_IFP] != NULL &&
1140 addrs[RTAX_IFP]->sa_family == AF_LINK) {
1141 sdl = (struct sockaddr_dl *)(void *)addrs[RTAX_IFP];
1142 ptr = sdl->sdl_data + sdl->sdl_nlen;
1143 get_physaddr(ifp, sdl, ptr);
1145 (void)mib_fetch_ifmib(ifp);
1148 #ifdef RTM_IFANNOUNCE
1149 case RTM_IFANNOUNCE:
1150 ifan = (struct if_announcemsghdr *)rtm;
1151 ifp = mib_find_if_sys(ifan->ifan_index);
1153 switch (ifan->ifan_what) {
1156 if (ifp == NULL && (ifp = mibif_create(ifan->ifan_index,
1157 ifan->ifan_name)) != NULL) {
1158 (void)mib_fetch_ifmib(ifp);
1164 case IFAN_DEPARTURE:
1173 mib_extract_addrs(rtm->rtm_addrs, (u_char *)(rtm + 1), addrs);
1174 if (rtm->rtm_flags & RTF_LLINFO) {
1175 if (addrs[RTAX_DST] == NULL ||
1176 addrs[RTAX_GATEWAY] == NULL ||
1177 addrs[RTAX_DST]->sa_family != AF_INET ||
1178 addrs[RTAX_GATEWAY]->sa_family != AF_LINK)
1181 (struct sockaddr_dl *)(void *)addrs[RTAX_GATEWAY],
1182 (struct sockaddr_in *)(void *)addrs[RTAX_DST]);
1184 if (rtm->rtm_errno == 0 && (rtm->rtm_flags & RTF_UP))
1185 mib_sroute_process(rtm, addrs[RTAX_GATEWAY],
1186 addrs[RTAX_DST], addrs[RTAX_NETMASK]);
1191 mib_extract_addrs(rtm->rtm_addrs, (u_char *)(rtm + 1), addrs);
1193 if (rtm->rtm_errno == 0 && (rtm->rtm_flags & RTF_UP))
1194 mib_sroute_process(rtm, addrs[RTAX_GATEWAY],
1195 addrs[RTAX_DST], addrs[RTAX_NETMASK]);
1201 * send a routing message
1204 mib_send_rtmsg(struct rt_msghdr *rtm, struct sockaddr *gw,
1205 struct sockaddr *dst, struct sockaddr *mask)
1208 struct rt_msghdr *msg;
1212 len = sizeof(*rtm) + SA_SIZE(gw) + SA_SIZE(dst) + SA_SIZE(mask);
1213 if ((msg = malloc(len)) == NULL) {
1214 syslog(LOG_ERR, "%s: %m", __func__);
1217 cp = (char *)(msg + 1);
1219 memset(msg, 0, sizeof(*msg));
1221 msg->rtm_version = RTM_VERSION;
1222 msg->rtm_addrs = RTA_DST | RTA_GATEWAY;
1224 memcpy(cp, dst, SA_SIZE(dst));
1226 memcpy(cp, gw, SA_SIZE(gw));
1229 memcpy(cp, mask, SA_SIZE(mask));
1230 cp += SA_SIZE(mask);
1231 msg->rtm_addrs |= RTA_NETMASK;
1233 msg->rtm_msglen = cp - (char *)msg;
1234 msg->rtm_type = RTM_GET;
1235 if ((sent = write(route, msg, msg->rtm_msglen)) == -1) {
1236 syslog(LOG_ERR, "%s: write: %m", __func__);
1240 if (sent != msg->rtm_msglen) {
1241 syslog(LOG_ERR, "%s: short write", __func__);
1249 * Fetch the routing table via sysctl
1252 mib_fetch_rtab(int af, int info, int arg, size_t *lenp)
1255 u_char *buf, *newbuf;
1266 /* initial estimate */
1267 if (sysctl(name, nitems(name), NULL, lenp, NULL, 0) == -1) {
1268 syslog(LOG_ERR, "sysctl estimate (%d,%d,%d,%d,%d,%d): %m",
1269 name[0], name[1], name[2], name[3], name[4], name[5]);
1277 if ((newbuf = realloc(buf, *lenp)) == NULL) {
1278 syslog(LOG_ERR, "sysctl buffer: %m");
1284 if (sysctl(name, nitems(name), buf, lenp, NULL, 0) == 0)
1287 if (errno != ENOMEM) {
1288 syslog(LOG_ERR, "sysctl get: %m");
1292 *lenp += *lenp / 8 + 1;
1299 * Update the following info: interface, interface addresses, interface
1300 * receive addresses, arp-table.
1301 * This does not change the interface list itself.
1304 update_ifa_info(void)
1307 struct rt_msghdr *rtm;
1308 struct mibifa *ifa, *ifa1;
1309 struct mibrcvaddr *rcv, *rcv1;
1311 static const int infos[][3] = {
1312 { 0, NET_RT_IFLIST, 0 },
1313 #ifdef NET_RT_IFMALIST
1314 { AF_LINK, NET_RT_IFMALIST, 0 },
1319 TAILQ_FOREACH(ifa, &mibifa_list, link)
1320 ifa->flags &= ~MIBIFA_FOUND;
1321 TAILQ_FOREACH(rcv, &mibrcvaddr_list, link)
1322 rcv->flags &= ~MIBRCVADDR_FOUND;
1324 for (i = 0; i < sizeof(infos) / sizeof(infos[0]); i++) {
1325 if ((buf = mib_fetch_rtab(infos[i][0], infos[i][1], infos[i][2],
1330 while (next < buf + needed) {
1331 rtm = (struct rt_msghdr *)(void *)next;
1332 next += rtm->rtm_msglen;
1339 * Purge the address list of unused entries. These may happen for
1340 * interface aliases that are on the same subnet. We don't receive
1341 * routing socket messages for them.
1343 ifa = TAILQ_FIRST(&mibifa_list);
1344 while (ifa != NULL) {
1345 ifa1 = TAILQ_NEXT(ifa, link);
1346 if (!(ifa->flags & MIBIFA_FOUND))
1351 rcv = TAILQ_FIRST(&mibrcvaddr_list);
1352 while (rcv != NULL) {
1353 rcv1 = TAILQ_NEXT(rcv, link);
1354 if (!(rcv->flags & (MIBRCVADDR_FOUND | MIBRCVADDR_BCAST |
1356 mib_rcvaddr_delete(rcv);
1365 mib_arp_update(void)
1367 struct mibarp *at, *at1;
1370 struct rt_msghdr *rtm;
1373 return; /* Aaargh */
1376 TAILQ_FOREACH(at, &mibarp_list, link)
1377 at->flags &= ~MIBARP_FOUND;
1379 if ((buf = mib_fetch_rtab(AF_INET, NET_RT_FLAGS, 0, &needed)) == NULL) {
1385 while (next < buf + needed) {
1386 rtm = (struct rt_msghdr *)(void *)next;
1387 next += rtm->rtm_msglen;
1392 at = TAILQ_FIRST(&mibarp_list);
1393 while (at != NULL) {
1394 at1 = TAILQ_NEXT(at, link);
1395 if (!(at->flags & MIBARP_FOUND))
1399 mibarpticks = get_ticks();
1405 * Input on the routing socket.
1408 route_input(int fd, void *udata __unused)
1410 u_char buf[1024 * 16];
1412 struct rt_msghdr *rtm;
1414 if ((n = read(fd, buf, sizeof(buf))) == -1)
1415 err(1, "read(rt_socket)");
1418 errx(1, "EOF on rt_socket");
1420 rtm = (struct rt_msghdr *)(void *)buf;
1421 if ((size_t)n != rtm->rtm_msglen)
1422 errx(1, "n=%zu, rtm_msglen=%u", (size_t)n, rtm->rtm_msglen);
1428 * execute and SIOCAIFADDR
1431 siocaifaddr(char *ifname, struct in_addr addr, struct in_addr mask,
1432 struct in_addr bcast)
1434 struct ifaliasreq addreq;
1435 struct sockaddr_in *sa;
1437 memset(&addreq, 0, sizeof(addreq));
1438 strlcpy(addreq.ifra_name, ifname, sizeof(addreq.ifra_name));
1440 sa = (struct sockaddr_in *)(void *)&addreq.ifra_addr;
1441 sa->sin_family = AF_INET;
1442 sa->sin_len = sizeof(*sa);
1443 sa->sin_addr = addr;
1445 sa = (struct sockaddr_in *)(void *)&addreq.ifra_mask;
1446 sa->sin_family = AF_INET;
1447 sa->sin_len = sizeof(*sa);
1448 sa->sin_addr = mask;
1450 sa = (struct sockaddr_in *)(void *)&addreq.ifra_broadaddr;
1451 sa->sin_family = AF_INET;
1452 sa->sin_len = sizeof(*sa);
1453 sa->sin_addr = bcast;
1455 return (ioctl(mib_netsock, SIOCAIFADDR, &addreq));
1459 * Exececute a SIOCDIFADDR
1462 siocdifaddr(const char *ifname, struct in_addr addr)
1464 struct ifreq delreq;
1465 struct sockaddr_in *sa;
1467 memset(&delreq, 0, sizeof(delreq));
1468 strlcpy(delreq.ifr_name, ifname, sizeof(delreq.ifr_name));
1469 sa = (struct sockaddr_in *)(void *)&delreq.ifr_addr;
1470 sa->sin_family = AF_INET;
1471 sa->sin_len = sizeof(*sa);
1472 sa->sin_addr = addr;
1474 return (ioctl(mib_netsock, SIOCDIFADDR, &delreq));
1478 * Verify an interface address without fetching the entire list
1481 verify_ifa(const char *name, struct mibifa *ifa)
1484 struct sockaddr_in *sa;
1486 memset(&req, 0, sizeof(req));
1487 strlcpy(req.ifr_name, name, sizeof(req.ifr_name));
1488 sa = (struct sockaddr_in *)(void *)&req.ifr_addr;
1489 sa->sin_family = AF_INET;
1490 sa->sin_len = sizeof(*sa);
1491 sa->sin_addr = ifa->inaddr;
1493 if (ioctl(mib_netsock, SIOCGIFADDR, &req) == -1)
1495 if (ifa->inaddr.s_addr != sa->sin_addr.s_addr) {
1496 syslog(LOG_ERR, "%s: address mismatch", __func__);
1500 if (ioctl(mib_netsock, SIOCGIFNETMASK, &req) == -1)
1502 if (ifa->inmask.s_addr != sa->sin_addr.s_addr) {
1503 syslog(LOG_ERR, "%s: netmask mismatch", __func__);
1510 * Restore a deleted interface address. Don't wait for the routing socket
1514 mib_undestroy_ifa(struct mibifa *ifa)
1518 if ((ifp = mib_find_if(ifa->ifindex)) == NULL)
1519 /* keep it destroyed */
1522 if (siocaifaddr(ifp->name, ifa->inaddr, ifa->inmask, ifa->inbcast))
1523 /* keep it destroyed */
1526 ifa->flags &= ~MIBIFA_DESTROYED;
1530 * Destroy an interface address
1533 mib_destroy_ifa(struct mibifa *ifa)
1537 if ((ifp = mib_find_if(ifa->ifindex)) == NULL) {
1542 if (siocdifaddr(ifp->name, ifa->inaddr)) {
1544 syslog(LOG_ERR, "SIOCDIFADDR: %m");
1548 ifa->flags |= MIBIFA_DESTROYED;
1553 * Rollback the modification of an address. Don't bother to wait for
1554 * the routing socket.
1557 mib_unmodify_ifa(struct mibifa *ifa)
1561 if ((ifp = mib_find_if(ifa->ifindex)) == NULL) {
1567 if (siocaifaddr(ifp->name, ifa->inaddr, ifa->inmask, ifa->inbcast)) {
1578 mib_modify_ifa(struct mibifa *ifa)
1582 if ((ifp = mib_find_if(ifa->ifindex)) == NULL) {
1588 if (siocaifaddr(ifp->name, ifa->inaddr, ifa->inmask, ifa->inbcast)) {
1594 if (verify_ifa(ifp->name, ifa)) {
1604 * Destroy a freshly created interface address. Don't bother to wait for
1605 * the routing socket.
1608 mib_uncreate_ifa(struct mibifa *ifa)
1612 if ((ifp = mib_find_if(ifa->ifindex)) == NULL) {
1617 if (siocdifaddr(ifp->name, ifa->inaddr)) {
1627 * Create a new ifa and verify it
1630 mib_create_ifa(u_int ifindex, struct in_addr addr, struct in_addr mask,
1631 struct in_addr bcast)
1636 if ((ifp = mib_find_if(ifindex)) == NULL)
1638 if ((ifa = alloc_ifa(ifindex, addr)) == NULL)
1641 ifa->inbcast = bcast;
1643 if (siocaifaddr(ifp->name, ifa->inaddr, ifa->inmask, ifa->inbcast)) {
1644 syslog(LOG_ERR, "%s: %m", __func__);
1648 if (verify_ifa(ifp->name, ifa)) {
1656 * Get all cloning interfaces and make them dynamic.
1657 * Hah! Whe should probably do this on a periodic basis (XXX).
1662 struct if_clonereq req;
1666 memset(&req, 0, sizeof(req));
1667 if (ioctl(mib_netsock, SIOCIFGCLONERS, &req) == -1) {
1668 syslog(LOG_ERR, "get cloners: %m");
1671 if ((buf = malloc(req.ifcr_total * IFNAMSIZ)) == NULL) {
1672 syslog(LOG_ERR, "%m");
1675 req.ifcr_count = req.ifcr_total;
1676 req.ifcr_buffer = buf;
1677 if (ioctl(mib_netsock, SIOCIFGCLONERS, &req) == -1) {
1678 syslog(LOG_ERR, "get cloners: %m");
1682 for (cp = buf, i = 0; i < req.ifcr_total; i++, cp += IFNAMSIZ)
1691 mibII_idle(void *arg __unused)
1695 if (mib_iflist_bad) {
1696 TAILQ_FOREACH(ifa, &mibifa_list, link)
1697 ifa->flags &= ~MIBIFA_DESTROYED;
1699 /* assume, that all cloning interfaces are dynamic */
1702 mib_refresh_iflist();
1718 if ((route_fd = fd_select(route, route_input, NULL, module)) == NULL) {
1719 syslog(LOG_ERR, "fd_select(route): %m");
1722 mib_refresh_iflist();
1725 (void)mib_fetch_route();
1726 mib_iftable_last_change = 0;
1727 mib_ifstack_last_change = 0;
1729 ifmib_reg = or_register(&oid_ifMIB,
1730 "The MIB module to describe generic objects for network interface"
1731 " sub-layers.", module);
1733 ipmib_reg = or_register(&oid_ipMIB,
1734 "The MIB module for managing IP and ICMP implementations, but "
1735 "excluding their management of IP routes.", module);
1737 tcpmib_reg = or_register(&oid_tcpMIB,
1738 "The MIB module for managing TCP implementations.", module);
1740 udpmib_reg = or_register(&oid_udpMIB,
1741 "The MIB module for managing UDP implementations.", module);
1743 ipForward_reg = or_register(&oid_ipForward,
1744 "The MIB module for the display of CIDR multipath IP Routes.",
1747 mibII_poll_timer = NULL;
1748 mibII_poll_ticks = MIBII_POLL_TICKS;
1749 mibif_restart_mibII_poll_timer();
1753 * Initialize the module
1756 mibII_init(struct lmodule *mod, int argc __unused, char *argv[] __unused)
1762 len = sizeof(clockinfo);
1763 if (sysctlbyname("kern.clockrate", &clockinfo, &len, NULL, 0) == -1) {
1764 syslog(LOG_ERR, "kern.clockrate: %m");
1767 if (len != sizeof(clockinfo)) {
1768 syslog(LOG_ERR, "kern.clockrate: wrong size");
1772 if ((route = socket(PF_ROUTE, SOCK_RAW, AF_UNSPEC)) == -1) {
1773 syslog(LOG_ERR, "PF_ROUTE: %m");
1777 if ((mib_netsock = socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
1778 syslog(LOG_ERR, "PF_INET: %m");
1782 (void)shutdown(mib_netsock, SHUT_RDWR);
1784 /* assume, that all cloning interfaces are dynamic */
1793 if (mibII_poll_timer != NULL ) {
1794 timer_stop(mibII_poll_timer);
1795 mibII_poll_timer = NULL;
1798 if (route_fd != NULL)
1799 fd_deselect(route_fd);
1802 if (mib_netsock != -1)
1803 (void)close(mib_netsock);
1804 /* XXX free memory */
1806 or_unregister(ipForward_reg);
1807 or_unregister(udpmib_reg);
1808 or_unregister(tcpmib_reg);
1809 or_unregister(ipmib_reg);
1810 or_unregister(ifmib_reg);
1816 mibII_loading(const struct lmodule *mod, int loaded)
1823 TAILQ_FOREACH(ifp, &mibif_list, link)
1824 if (ifp->xnotify_mod == mod) {
1825 ifp->xnotify_mod = NULL;
1826 ifp->xnotify_data = NULL;
1827 ifp->xnotify = NULL;
1830 mib_unregister_newif(mod);
1833 extern const struct snmp_module config;
1834 const struct snmp_module config = {
1835 "This module implements the interface and ip groups.",
1849 * Should have a list of these attached to each interface.
1852 mibif_notify(struct mibif *ifp, const struct lmodule *mod,
1853 mibif_notify_f func, void *data)
1855 ifp->xnotify = func;
1856 ifp->xnotify_data = data;
1857 ifp->xnotify_mod = mod;
1863 mibif_unnotify(void *arg)
1865 struct mibif *ifp = arg;
1867 ifp->xnotify = NULL;
1868 ifp->xnotify_data = NULL;
1869 ifp->xnotify_mod = NULL;