17850265eSShteryana Shopova /*-
24d846d26SWarner Losh * SPDX-License-Identifier: BSD-2-Clause
31de7b4b8SPedro F. Giffuni *
47850265eSShteryana Shopova * Copyright (c) 2006 Shteryana Shopova <syrinx@FreeBSD.org>
57850265eSShteryana Shopova * All rights reserved.
67850265eSShteryana Shopova *
77850265eSShteryana Shopova * Redistribution and use in source and binary forms, with or without
87850265eSShteryana Shopova * modification, are permitted provided that the following conditions
97850265eSShteryana Shopova * are met:
107850265eSShteryana Shopova * 1. Redistributions of source code must retain the above copyright
117850265eSShteryana Shopova * notice, this list of conditions and the following disclaimer.
127850265eSShteryana Shopova * 2. Redistributions in binary form must reproduce the above copyright
137850265eSShteryana Shopova * notice, this list of conditions and the following disclaimer in the
147850265eSShteryana Shopova * documentation and/or other materials provided with the distribution.
157850265eSShteryana Shopova *
167850265eSShteryana Shopova * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
177850265eSShteryana Shopova * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
187850265eSShteryana Shopova * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
197850265eSShteryana Shopova * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
207850265eSShteryana Shopova * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
217850265eSShteryana Shopova * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
227850265eSShteryana Shopova * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
237850265eSShteryana Shopova * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
247850265eSShteryana Shopova * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
257850265eSShteryana Shopova * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
267850265eSShteryana Shopova * SUCH DAMAGE.
277850265eSShteryana Shopova *
287850265eSShteryana Shopova * Bridge MIB implementation for SNMPd.
297850265eSShteryana Shopova */
307850265eSShteryana Shopova
317850265eSShteryana Shopova #include <sys/param.h>
327850265eSShteryana Shopova #include <sys/queue.h>
337850265eSShteryana Shopova #include <sys/socket.h>
347850265eSShteryana Shopova #include <sys/types.h>
357850265eSShteryana Shopova
367850265eSShteryana Shopova #include <net/ethernet.h>
377850265eSShteryana Shopova #include <net/if.h>
387850265eSShteryana Shopova #include <net/if_mib.h>
397850265eSShteryana Shopova #include <net/if_types.h>
407850265eSShteryana Shopova
417850265eSShteryana Shopova #include <errno.h>
427850265eSShteryana Shopova #include <stdarg.h>
437850265eSShteryana Shopova #include <stdlib.h>
447850265eSShteryana Shopova #include <stdio.h>
457850265eSShteryana Shopova #include <string.h>
467850265eSShteryana Shopova #include <syslog.h>
477850265eSShteryana Shopova
487850265eSShteryana Shopova #include <bsnmp/snmpmod.h>
497850265eSShteryana Shopova #include <bsnmp/snmp_mibII.h>
507850265eSShteryana Shopova
518e9b3e70SHartmut Brandt #define SNMPTREE_TYPES
527850265eSShteryana Shopova #include "bridge_tree.h"
537850265eSShteryana Shopova #include "bridge_snmp.h"
547850265eSShteryana Shopova #include "bridge_oid.h"
557850265eSShteryana Shopova
567850265eSShteryana Shopova static struct lmodule *bridge_module;
577850265eSShteryana Shopova
587850265eSShteryana Shopova /* For the registration. */
597850265eSShteryana Shopova static const struct asn_oid oid_dot1Bridge = OIDX_dot1dBridge;
607850265eSShteryana Shopova /* The registration. */
617850265eSShteryana Shopova static uint reg_bridge;
627850265eSShteryana Shopova
637850265eSShteryana Shopova /* Periodic timer for polling all bridges' data. */
647850265eSShteryana Shopova static void *bridge_data_timer;
657850265eSShteryana Shopova static void *bridge_tc_timer;
667850265eSShteryana Shopova
677850265eSShteryana Shopova static int bridge_data_maxage = SNMP_BRIDGE_DATA_MAXAGE;
687850265eSShteryana Shopova static int bridge_poll_ticks = SNMP_BRIDGE_POLL_INTERVAL * 100;
697850265eSShteryana Shopova static int bridge_tc_poll_ticks = SNMP_BRIDGE_TC_POLL_INTERVAL * 100;
707850265eSShteryana Shopova
717850265eSShteryana Shopova /*
727850265eSShteryana Shopova * Our default bridge, whose info will be visible under
737850265eSShteryana Shopova * the dot1dBridge subtree and functions to set/fetch it.
747850265eSShteryana Shopova */
757850265eSShteryana Shopova static char bif_default_name[IFNAMSIZ] = "bridge0";
767850265eSShteryana Shopova static struct bridge_if *bif_default;
777850265eSShteryana Shopova
787850265eSShteryana Shopova struct bridge_if *
bridge_get_default(void)797850265eSShteryana Shopova bridge_get_default(void)
807850265eSShteryana Shopova {
817850265eSShteryana Shopova struct mibif *ifp;
827850265eSShteryana Shopova
837850265eSShteryana Shopova if (bif_default != NULL) {
847850265eSShteryana Shopova
857850265eSShteryana Shopova /* Walk through the mibII interface list. */
867850265eSShteryana Shopova for (ifp = mib_first_if(); ifp != NULL; ifp = mib_next_if(ifp))
877850265eSShteryana Shopova if (strcmp(ifp->name, bif_default->bif_name) == 0)
887850265eSShteryana Shopova break;
897850265eSShteryana Shopova
907850265eSShteryana Shopova if (ifp == NULL)
917850265eSShteryana Shopova bif_default = NULL;
927850265eSShteryana Shopova }
937850265eSShteryana Shopova
947850265eSShteryana Shopova return (bif_default);
957850265eSShteryana Shopova }
967850265eSShteryana Shopova
977850265eSShteryana Shopova void
bridge_set_default(struct bridge_if * bif)987850265eSShteryana Shopova bridge_set_default(struct bridge_if *bif)
997850265eSShteryana Shopova {
1007850265eSShteryana Shopova bif_default = bif;
1017850265eSShteryana Shopova
1027850265eSShteryana Shopova syslog(LOG_ERR, "Set default bridge interface to: %s",
1037850265eSShteryana Shopova bif == NULL ? "(none)" : bif->bif_name);
1047850265eSShteryana Shopova }
1057850265eSShteryana Shopova
1067850265eSShteryana Shopova const char *
bridge_get_default_name(void)1077850265eSShteryana Shopova bridge_get_default_name(void)
1087850265eSShteryana Shopova {
1097850265eSShteryana Shopova return (bif_default_name);
1107850265eSShteryana Shopova }
1117850265eSShteryana Shopova
1127850265eSShteryana Shopova static int
bridge_set_default_name(const char * bif_name,uint len)1137850265eSShteryana Shopova bridge_set_default_name(const char *bif_name, uint len)
1147850265eSShteryana Shopova {
1157850265eSShteryana Shopova struct bridge_if *bif;
1167850265eSShteryana Shopova
1177850265eSShteryana Shopova if (len >= IFNAMSIZ)
1187850265eSShteryana Shopova return (-1);
1197850265eSShteryana Shopova
1207850265eSShteryana Shopova bcopy(bif_name, bif_default_name, len);
1217850265eSShteryana Shopova bif_default_name[len] = '\0';
1227850265eSShteryana Shopova
123b5906f8eSShteryana Shopova if ((bif = bridge_if_find_ifname(bif_default_name)) == NULL) {
124b5906f8eSShteryana Shopova bif_default = NULL;
1257850265eSShteryana Shopova return (0);
126b5906f8eSShteryana Shopova }
1277850265eSShteryana Shopova
1287850265eSShteryana Shopova bif_default = bif;
1297850265eSShteryana Shopova return (1);
1307850265eSShteryana Shopova }
1317850265eSShteryana Shopova
1327850265eSShteryana Shopova int
bridge_get_data_maxage(void)1337850265eSShteryana Shopova bridge_get_data_maxage(void)
1347850265eSShteryana Shopova {
1357850265eSShteryana Shopova return (bridge_data_maxage);
1367850265eSShteryana Shopova }
1377850265eSShteryana Shopova
1387850265eSShteryana Shopova static void
bridge_set_poll_ticks(int poll_ticks)1397850265eSShteryana Shopova bridge_set_poll_ticks(int poll_ticks)
1407850265eSShteryana Shopova {
1417850265eSShteryana Shopova if (bridge_data_timer != NULL)
1427850265eSShteryana Shopova timer_stop(bridge_data_timer);
1437850265eSShteryana Shopova
1447850265eSShteryana Shopova bridge_poll_ticks = poll_ticks;
1457850265eSShteryana Shopova bridge_data_timer = timer_start_repeat(bridge_poll_ticks,
1467850265eSShteryana Shopova bridge_poll_ticks, bridge_update_all, NULL, bridge_module);
1477850265eSShteryana Shopova }
1487850265eSShteryana Shopova /*
1497850265eSShteryana Shopova * The bridge module configuration via SNMP.
1507850265eSShteryana Shopova */
1517850265eSShteryana Shopova static int
bridge_default_name_save(struct snmp_context * ctx,const char * bridge_default)1527850265eSShteryana Shopova bridge_default_name_save(struct snmp_context *ctx, const char *bridge_default)
1537850265eSShteryana Shopova {
1547850265eSShteryana Shopova if ((ctx->scratch->int1 = strlen(bridge_default)) >= IFNAMSIZ)
1557850265eSShteryana Shopova return (-1);
1567850265eSShteryana Shopova
1577850265eSShteryana Shopova if ((ctx->scratch->ptr1 = malloc(IFNAMSIZ)) == NULL)
1587850265eSShteryana Shopova return (-1);
1597850265eSShteryana Shopova
1607850265eSShteryana Shopova strncpy(ctx->scratch->ptr1, bridge_default, ctx->scratch->int1);
1617850265eSShteryana Shopova return (0);
1627850265eSShteryana Shopova }
1637850265eSShteryana Shopova
1647850265eSShteryana Shopova int
op_begemot_bridge_config(struct snmp_context * ctx,struct snmp_value * val,uint sub,uint iidx __unused,enum snmp_op op)1657850265eSShteryana Shopova op_begemot_bridge_config(struct snmp_context *ctx, struct snmp_value *val,
1667850265eSShteryana Shopova uint sub, uint iidx __unused, enum snmp_op op)
1677850265eSShteryana Shopova {
1687850265eSShteryana Shopova switch (op) {
1697850265eSShteryana Shopova case SNMP_OP_GET:
1707850265eSShteryana Shopova switch (val->var.subs[sub - 1]) {
1717850265eSShteryana Shopova case LEAF_begemotBridgeDefaultBridgeIf:
172f02a1e57SShteryana Shopova return (string_get(val, bridge_get_default_name(), -1));
173f02a1e57SShteryana Shopova
1747850265eSShteryana Shopova case LEAF_begemotBridgeDataUpdate:
1757850265eSShteryana Shopova val->v.integer = bridge_data_maxage;
176f02a1e57SShteryana Shopova return (SNMP_ERR_NOERROR);
177f02a1e57SShteryana Shopova
1787850265eSShteryana Shopova case LEAF_begemotBridgeDataPoll:
1797850265eSShteryana Shopova val->v.integer = bridge_poll_ticks / 100;
1807850265eSShteryana Shopova return (SNMP_ERR_NOERROR);
181f02a1e57SShteryana Shopova }
182f02a1e57SShteryana Shopova abort();
1837850265eSShteryana Shopova
1847850265eSShteryana Shopova case SNMP_OP_GETNEXT:
1857850265eSShteryana Shopova abort();
1867850265eSShteryana Shopova
1877850265eSShteryana Shopova case SNMP_OP_SET:
1887850265eSShteryana Shopova switch (val->var.subs[sub - 1]) {
1897850265eSShteryana Shopova case LEAF_begemotBridgeDefaultBridgeIf:
1907850265eSShteryana Shopova /*
1917850265eSShteryana Shopova * Cannot use string_save() here - requires either
1927850265eSShteryana Shopova * a fixed-sized or var-length string - not less
1937850265eSShteryana Shopova * than or equal.
1947850265eSShteryana Shopova */
1957850265eSShteryana Shopova if (bridge_default_name_save(ctx,
1967850265eSShteryana Shopova bridge_get_default_name()) < 0)
1977850265eSShteryana Shopova return (SNMP_ERR_RES_UNAVAIL);
1987850265eSShteryana Shopova
1997850265eSShteryana Shopova if (bridge_set_default_name(val->v.octetstring.octets,
2007850265eSShteryana Shopova val->v.octetstring.len) < 0)
2017850265eSShteryana Shopova return (SNMP_ERR_BADVALUE);
202f02a1e57SShteryana Shopova return (SNMP_ERR_NOERROR);
203f02a1e57SShteryana Shopova
2047850265eSShteryana Shopova case LEAF_begemotBridgeDataUpdate:
205b5906f8eSShteryana Shopova if (val->v.integer < SNMP_BRIDGE_DATA_MAXAGE_MIN ||
206b5906f8eSShteryana Shopova val->v.integer > SNMP_BRIDGE_DATA_MAXAGE_MAX)
207b5906f8eSShteryana Shopova return (SNMP_ERR_WRONG_VALUE);
2087850265eSShteryana Shopova ctx->scratch->int1 = bridge_data_maxage;
2097850265eSShteryana Shopova bridge_data_maxage = val->v.integer;
210f02a1e57SShteryana Shopova return (SNMP_ERR_NOERROR);
211f02a1e57SShteryana Shopova
2127850265eSShteryana Shopova case LEAF_begemotBridgeDataPoll:
213b5906f8eSShteryana Shopova if (val->v.integer < SNMP_BRIDGE_POLL_INTERVAL_MIN ||
214b5906f8eSShteryana Shopova val->v.integer > SNMP_BRIDGE_POLL_INTERVAL_MAX)
215b5906f8eSShteryana Shopova return (SNMP_ERR_WRONG_VALUE);
2167850265eSShteryana Shopova ctx->scratch->int1 = val->v.integer;
2177850265eSShteryana Shopova return (SNMP_ERR_NOERROR);
218f02a1e57SShteryana Shopova }
219f02a1e57SShteryana Shopova abort();
2207850265eSShteryana Shopova
2217850265eSShteryana Shopova case SNMP_OP_ROLLBACK:
2227850265eSShteryana Shopova switch (val->var.subs[sub - 1]) {
2237850265eSShteryana Shopova case LEAF_begemotBridgeDefaultBridgeIf:
2247850265eSShteryana Shopova bridge_set_default_name(ctx->scratch->ptr1,
2257850265eSShteryana Shopova ctx->scratch->int1);
2267850265eSShteryana Shopova free(ctx->scratch->ptr1);
2277850265eSShteryana Shopova break;
2287850265eSShteryana Shopova case LEAF_begemotBridgeDataUpdate:
2297850265eSShteryana Shopova bridge_data_maxage = ctx->scratch->int1;
2307850265eSShteryana Shopova break;
2317850265eSShteryana Shopova }
2327850265eSShteryana Shopova return (SNMP_ERR_NOERROR);
2337850265eSShteryana Shopova
2347850265eSShteryana Shopova case SNMP_OP_COMMIT:
2357850265eSShteryana Shopova switch (val->var.subs[sub - 1]) {
2367850265eSShteryana Shopova case LEAF_begemotBridgeDefaultBridgeIf:
2377850265eSShteryana Shopova free(ctx->scratch->ptr1);
2387850265eSShteryana Shopova break;
2397850265eSShteryana Shopova case LEAF_begemotBridgeDataPoll:
2407850265eSShteryana Shopova bridge_set_poll_ticks(ctx->scratch->int1 * 100);
2417850265eSShteryana Shopova break;
2427850265eSShteryana Shopova }
2437850265eSShteryana Shopova return (SNMP_ERR_NOERROR);
2447850265eSShteryana Shopova }
2457850265eSShteryana Shopova
246f02a1e57SShteryana Shopova abort();
2477850265eSShteryana Shopova }
2487850265eSShteryana Shopova
2497850265eSShteryana Shopova /*
2507850265eSShteryana Shopova * Bridge mib module initialization hook.
2517850265eSShteryana Shopova * Returns 0 on success, < 0 on error.
2527850265eSShteryana Shopova */
2537850265eSShteryana Shopova static int
bridge_init(struct lmodule * mod,int argc __unused,char * argv[]__unused)2547850265eSShteryana Shopova bridge_init(struct lmodule * mod, int argc __unused, char *argv[] __unused)
2557850265eSShteryana Shopova {
2567850265eSShteryana Shopova bridge_module = mod;
2577850265eSShteryana Shopova
2587850265eSShteryana Shopova if (bridge_kmod_load() < 0)
2597850265eSShteryana Shopova return (-1);
2607850265eSShteryana Shopova
2617850265eSShteryana Shopova if (bridge_ioctl_init() < 0)
2627850265eSShteryana Shopova return (-1);
2637850265eSShteryana Shopova
2647850265eSShteryana Shopova /* Register to get creation messages for bridge interfaces. */
2657850265eSShteryana Shopova if (mib_register_newif(bridge_attach_newif, bridge_module)) {
2667850265eSShteryana Shopova syslog(LOG_ERR, "Cannot register newif function: %s",
2677850265eSShteryana Shopova strerror(errno));
2687850265eSShteryana Shopova return (-1);
2697850265eSShteryana Shopova }
2707850265eSShteryana Shopova
2717850265eSShteryana Shopova return (0);
2727850265eSShteryana Shopova }
2737850265eSShteryana Shopova
2747850265eSShteryana Shopova /*
2757850265eSShteryana Shopova * Bridge mib module finalization hook.
2767850265eSShteryana Shopova */
2777850265eSShteryana Shopova static int
bridge_fini(void)2787850265eSShteryana Shopova bridge_fini(void)
2797850265eSShteryana Shopova {
2807850265eSShteryana Shopova mib_unregister_newif(bridge_module);
2817850265eSShteryana Shopova or_unregister(reg_bridge);
2827850265eSShteryana Shopova
2837850265eSShteryana Shopova if (bridge_data_timer != NULL) {
2847850265eSShteryana Shopova timer_stop(bridge_data_timer);
2857850265eSShteryana Shopova bridge_data_timer = NULL;
2867850265eSShteryana Shopova }
2877850265eSShteryana Shopova
2887850265eSShteryana Shopova if (bridge_tc_timer != NULL) {
2897850265eSShteryana Shopova timer_stop(bridge_tc_timer);
2907850265eSShteryana Shopova bridge_tc_timer = NULL;
2917850265eSShteryana Shopova }
2927850265eSShteryana Shopova
2937850265eSShteryana Shopova bridge_ifs_fini();
2947850265eSShteryana Shopova bridge_ports_fini();
2957850265eSShteryana Shopova bridge_addrs_fini();
2967850265eSShteryana Shopova
2977850265eSShteryana Shopova return (0);
2987850265eSShteryana Shopova }
2997850265eSShteryana Shopova
3007850265eSShteryana Shopova /*
3017850265eSShteryana Shopova * Bridge mib module start operation.
3027850265eSShteryana Shopova */
3037850265eSShteryana Shopova static void
bridge_start(void)3047850265eSShteryana Shopova bridge_start(void)
3057850265eSShteryana Shopova {
3067850265eSShteryana Shopova reg_bridge = or_register(&oid_dot1Bridge,
3077850265eSShteryana Shopova "The IETF MIB for Bridges (RFC 4188).", bridge_module);
3087850265eSShteryana Shopova
3097850265eSShteryana Shopova bridge_data_timer = timer_start_repeat(bridge_poll_ticks,
3107850265eSShteryana Shopova bridge_poll_ticks, bridge_update_all, NULL, bridge_module);
3117850265eSShteryana Shopova
3127850265eSShteryana Shopova bridge_tc_timer = timer_start_repeat(bridge_tc_poll_ticks,
3137850265eSShteryana Shopova bridge_tc_poll_ticks, bridge_update_tc_time, NULL, bridge_module);
3147850265eSShteryana Shopova }
3157850265eSShteryana Shopova
3167850265eSShteryana Shopova static void
bridge_dump(void)3177850265eSShteryana Shopova bridge_dump(void)
3187850265eSShteryana Shopova {
3197850265eSShteryana Shopova struct bridge_if *bif;
3207850265eSShteryana Shopova
3217850265eSShteryana Shopova if ((bif = bridge_get_default()) == NULL)
3227850265eSShteryana Shopova syslog(LOG_ERR, "Dump: no default bridge interface");
3237850265eSShteryana Shopova else
3247850265eSShteryana Shopova syslog(LOG_ERR, "Dump: default bridge interface %s",
3257850265eSShteryana Shopova bif->bif_name);
3267850265eSShteryana Shopova
3277850265eSShteryana Shopova bridge_ifs_dump();
3287850265eSShteryana Shopova bridge_pf_dump();
3297850265eSShteryana Shopova }
3307850265eSShteryana Shopova
3317850265eSShteryana Shopova const struct snmp_module config = {
3327850265eSShteryana Shopova .comment = "This module implements the bridge mib (RFC 4188).",
3337850265eSShteryana Shopova .init = bridge_init,
3347850265eSShteryana Shopova .fini = bridge_fini,
3357850265eSShteryana Shopova .start = bridge_start,
3367850265eSShteryana Shopova .tree = bridge_ctree,
3377850265eSShteryana Shopova .dump = bridge_dump,
3387850265eSShteryana Shopova .tree_size = bridge_CTREE_SIZE,
3397850265eSShteryana Shopova };
340