1/*-
2 * Copyright (c) 2006 Shteryana Shopova <syrinx@FreeBSD.org>
3 * 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
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * Bridge MIB implementation for SNMPd.
27 *
| 1/*-
2 * Copyright (c) 2006 Shteryana Shopova <syrinx@FreeBSD.org>
3 * 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
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * Bridge MIB implementation for SNMPd.
27 *
|
28 * $FreeBSD: head/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_snmp.c 164410 2006-11-19 15:42:48Z syrinx $
| 28 * $FreeBSD: head/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_snmp.c 164997 2006-12-07 22:36:17Z syrinx $
|
29 */
30
31#include <sys/param.h>
32#include <sys/queue.h>
33#include <sys/socket.h>
34#include <sys/types.h>
35
36#include <net/ethernet.h>
37#include <net/if.h>
38#include <net/if_mib.h>
39#include <net/if_types.h>
40
41#include <errno.h>
42#include <stdarg.h>
43#include <stdlib.h>
44#include <stdio.h>
45#include <string.h>
46#include <syslog.h>
47
48#include <bsnmp/snmpmod.h>
49#include <bsnmp/snmp_mibII.h>
50
51#include "bridge_tree.h"
52#include "bridge_snmp.h"
53#include "bridge_oid.h"
54
55static struct lmodule *bridge_module;
56
57/* For the registration. */
58static const struct asn_oid oid_dot1Bridge = OIDX_dot1dBridge;
59/* The registration. */
60static uint reg_bridge;
61
62/* Periodic timer for polling all bridges' data. */
63static void *bridge_data_timer;
64static void *bridge_tc_timer;
65
66static int bridge_data_maxage = SNMP_BRIDGE_DATA_MAXAGE;
67static int bridge_poll_ticks = SNMP_BRIDGE_POLL_INTERVAL * 100;
68static int bridge_tc_poll_ticks = SNMP_BRIDGE_TC_POLL_INTERVAL * 100;
69
70/*
71 * Our default bridge, whose info will be visible under
72 * the dot1dBridge subtree and functions to set/fetch it.
73 */
74static char bif_default_name[IFNAMSIZ] = "bridge0";
75static struct bridge_if *bif_default;
76
77struct bridge_if *
78bridge_get_default(void)
79{
80 struct mibif *ifp;
81
82 if (bif_default != NULL) {
83
84 /* Walk through the mibII interface list. */
85 for (ifp = mib_first_if(); ifp != NULL; ifp = mib_next_if(ifp))
86 if (strcmp(ifp->name, bif_default->bif_name) == 0)
87 break;
88
89 if (ifp == NULL)
90 bif_default = NULL;
91 }
92
93 return (bif_default);
94}
95
96void
97bridge_set_default(struct bridge_if *bif)
98{
99 bif_default = bif;
100
101 syslog(LOG_ERR, "Set default bridge interface to: %s",
102 bif == NULL ? "(none)" : bif->bif_name);
103}
104
105const char *
106bridge_get_default_name(void)
107{
108 return (bif_default_name);
109}
110
111static int
112bridge_set_default_name(const char *bif_name, uint len)
113{
114 struct bridge_if *bif;
115
116 if (len >= IFNAMSIZ)
117 return (-1);
118
119 bcopy(bif_name, bif_default_name, len);
120 bif_default_name[len] = '\0';
121
| 29 */
30
31#include <sys/param.h>
32#include <sys/queue.h>
33#include <sys/socket.h>
34#include <sys/types.h>
35
36#include <net/ethernet.h>
37#include <net/if.h>
38#include <net/if_mib.h>
39#include <net/if_types.h>
40
41#include <errno.h>
42#include <stdarg.h>
43#include <stdlib.h>
44#include <stdio.h>
45#include <string.h>
46#include <syslog.h>
47
48#include <bsnmp/snmpmod.h>
49#include <bsnmp/snmp_mibII.h>
50
51#include "bridge_tree.h"
52#include "bridge_snmp.h"
53#include "bridge_oid.h"
54
55static struct lmodule *bridge_module;
56
57/* For the registration. */
58static const struct asn_oid oid_dot1Bridge = OIDX_dot1dBridge;
59/* The registration. */
60static uint reg_bridge;
61
62/* Periodic timer for polling all bridges' data. */
63static void *bridge_data_timer;
64static void *bridge_tc_timer;
65
66static int bridge_data_maxage = SNMP_BRIDGE_DATA_MAXAGE;
67static int bridge_poll_ticks = SNMP_BRIDGE_POLL_INTERVAL * 100;
68static int bridge_tc_poll_ticks = SNMP_BRIDGE_TC_POLL_INTERVAL * 100;
69
70/*
71 * Our default bridge, whose info will be visible under
72 * the dot1dBridge subtree and functions to set/fetch it.
73 */
74static char bif_default_name[IFNAMSIZ] = "bridge0";
75static struct bridge_if *bif_default;
76
77struct bridge_if *
78bridge_get_default(void)
79{
80 struct mibif *ifp;
81
82 if (bif_default != NULL) {
83
84 /* Walk through the mibII interface list. */
85 for (ifp = mib_first_if(); ifp != NULL; ifp = mib_next_if(ifp))
86 if (strcmp(ifp->name, bif_default->bif_name) == 0)
87 break;
88
89 if (ifp == NULL)
90 bif_default = NULL;
91 }
92
93 return (bif_default);
94}
95
96void
97bridge_set_default(struct bridge_if *bif)
98{
99 bif_default = bif;
100
101 syslog(LOG_ERR, "Set default bridge interface to: %s",
102 bif == NULL ? "(none)" : bif->bif_name);
103}
104
105const char *
106bridge_get_default_name(void)
107{
108 return (bif_default_name);
109}
110
111static int
112bridge_set_default_name(const char *bif_name, uint len)
113{
114 struct bridge_if *bif;
115
116 if (len >= IFNAMSIZ)
117 return (-1);
118
119 bcopy(bif_name, bif_default_name, len);
120 bif_default_name[len] = '\0';
121
|
122 if ((bif = bridge_if_find_ifname(bif_default_name)) == NULL)
| 122 if ((bif = bridge_if_find_ifname(bif_default_name)) == NULL) {
123 bif_default = NULL;
|
123 return (0);
| 124 return (0);
|
| 125 }
|
124
125 bif_default = bif;
126 return (1);
127}
128
129int
130bridge_get_data_maxage(void)
131{
132 return (bridge_data_maxage);
133}
134
135static void
136bridge_set_poll_ticks(int poll_ticks)
137{
138 if (bridge_data_timer != NULL)
139 timer_stop(bridge_data_timer);
140
141 bridge_poll_ticks = poll_ticks;
142 bridge_data_timer = timer_start_repeat(bridge_poll_ticks,
143 bridge_poll_ticks, bridge_update_all, NULL, bridge_module);
144}
145/*
146 * The bridge module configuration via SNMP.
147 */
148static int
149bridge_default_name_save(struct snmp_context *ctx, const char *bridge_default)
150{
151 if ((ctx->scratch->int1 = strlen(bridge_default)) >= IFNAMSIZ)
152 return (-1);
153
154 if ((ctx->scratch->ptr1 = malloc(IFNAMSIZ)) == NULL)
155 return (-1);
156
157 strncpy(ctx->scratch->ptr1, bridge_default, ctx->scratch->int1);
158 return (0);
159}
160
161int
162op_begemot_bridge_config(struct snmp_context *ctx, struct snmp_value *val,
163 uint sub, uint iidx __unused, enum snmp_op op)
164{
165 switch (op) {
166 case SNMP_OP_GET:
167 switch (val->var.subs[sub - 1]) {
168 case LEAF_begemotBridgeDefaultBridgeIf:
169 string_get(val, bridge_get_default_name(), -1);
170 break;
171 case LEAF_begemotBridgeDataUpdate:
172 val->v.integer = bridge_data_maxage;
173 break;
174 case LEAF_begemotBridgeDataPoll:
175 val->v.integer = bridge_poll_ticks / 100;
176 break;
177 }
178 return (SNMP_ERR_NOERROR);
179
180 case SNMP_OP_GETNEXT:
181 abort();
182
183 case SNMP_OP_SET:
184 switch (val->var.subs[sub - 1]) {
185 case LEAF_begemotBridgeDefaultBridgeIf:
186 /*
187 * Cannot use string_save() here - requires either
188 * a fixed-sized or var-length string - not less
189 * than or equal.
190 */
191 if (bridge_default_name_save(ctx,
192 bridge_get_default_name()) < 0)
193 return (SNMP_ERR_RES_UNAVAIL);
194
195 if (bridge_set_default_name(val->v.octetstring.octets,
196 val->v.octetstring.len) < 0)
197 return (SNMP_ERR_BADVALUE);
198 break;
199 case LEAF_begemotBridgeDataUpdate:
| 126
127 bif_default = bif;
128 return (1);
129}
130
131int
132bridge_get_data_maxage(void)
133{
134 return (bridge_data_maxage);
135}
136
137static void
138bridge_set_poll_ticks(int poll_ticks)
139{
140 if (bridge_data_timer != NULL)
141 timer_stop(bridge_data_timer);
142
143 bridge_poll_ticks = poll_ticks;
144 bridge_data_timer = timer_start_repeat(bridge_poll_ticks,
145 bridge_poll_ticks, bridge_update_all, NULL, bridge_module);
146}
147/*
148 * The bridge module configuration via SNMP.
149 */
150static int
151bridge_default_name_save(struct snmp_context *ctx, const char *bridge_default)
152{
153 if ((ctx->scratch->int1 = strlen(bridge_default)) >= IFNAMSIZ)
154 return (-1);
155
156 if ((ctx->scratch->ptr1 = malloc(IFNAMSIZ)) == NULL)
157 return (-1);
158
159 strncpy(ctx->scratch->ptr1, bridge_default, ctx->scratch->int1);
160 return (0);
161}
162
163int
164op_begemot_bridge_config(struct snmp_context *ctx, struct snmp_value *val,
165 uint sub, uint iidx __unused, enum snmp_op op)
166{
167 switch (op) {
168 case SNMP_OP_GET:
169 switch (val->var.subs[sub - 1]) {
170 case LEAF_begemotBridgeDefaultBridgeIf:
171 string_get(val, bridge_get_default_name(), -1);
172 break;
173 case LEAF_begemotBridgeDataUpdate:
174 val->v.integer = bridge_data_maxage;
175 break;
176 case LEAF_begemotBridgeDataPoll:
177 val->v.integer = bridge_poll_ticks / 100;
178 break;
179 }
180 return (SNMP_ERR_NOERROR);
181
182 case SNMP_OP_GETNEXT:
183 abort();
184
185 case SNMP_OP_SET:
186 switch (val->var.subs[sub - 1]) {
187 case LEAF_begemotBridgeDefaultBridgeIf:
188 /*
189 * Cannot use string_save() here - requires either
190 * a fixed-sized or var-length string - not less
191 * than or equal.
192 */
193 if (bridge_default_name_save(ctx,
194 bridge_get_default_name()) < 0)
195 return (SNMP_ERR_RES_UNAVAIL);
196
197 if (bridge_set_default_name(val->v.octetstring.octets,
198 val->v.octetstring.len) < 0)
199 return (SNMP_ERR_BADVALUE);
200 break;
201 case LEAF_begemotBridgeDataUpdate:
|
| 202 if (val->v.integer < SNMP_BRIDGE_DATA_MAXAGE_MIN ||
203 val->v.integer > SNMP_BRIDGE_DATA_MAXAGE_MAX)
204 return (SNMP_ERR_WRONG_VALUE);
|
200 ctx->scratch->int1 = bridge_data_maxage;
201 bridge_data_maxage = val->v.integer;
202 break;
203 case LEAF_begemotBridgeDataPoll:
| 205 ctx->scratch->int1 = bridge_data_maxage;
206 bridge_data_maxage = val->v.integer;
207 break;
208 case LEAF_begemotBridgeDataPoll:
|
| 209 if (val->v.integer < SNMP_BRIDGE_POLL_INTERVAL_MIN ||
210 val->v.integer > SNMP_BRIDGE_POLL_INTERVAL_MAX)
211 return (SNMP_ERR_WRONG_VALUE);
|
204 ctx->scratch->int1 = val->v.integer;
205 break;
206 }
207 return (SNMP_ERR_NOERROR);
208
209 case SNMP_OP_ROLLBACK:
210 switch (val->var.subs[sub - 1]) {
211 case LEAF_begemotBridgeDefaultBridgeIf:
212 bridge_set_default_name(ctx->scratch->ptr1,
213 ctx->scratch->int1);
214 free(ctx->scratch->ptr1);
215 break;
216 case LEAF_begemotBridgeDataUpdate:
217 bridge_data_maxage = ctx->scratch->int1;
218 break;
219 }
220 return (SNMP_ERR_NOERROR);
221
222 case SNMP_OP_COMMIT:
223 switch (val->var.subs[sub - 1]) {
224 case LEAF_begemotBridgeDefaultBridgeIf:
225 free(ctx->scratch->ptr1);
226 break;
227 case LEAF_begemotBridgeDataPoll:
228 bridge_set_poll_ticks(ctx->scratch->int1 * 100);
229 break;
230 }
231 return (SNMP_ERR_NOERROR);
232 }
233
234 return (SNMP_ERR_NOERROR);
235}
236
237/*
238 * Bridge mib module initialization hook.
239 * Returns 0 on success, < 0 on error.
240 */
241static int
242bridge_init(struct lmodule * mod, int argc __unused, char *argv[] __unused)
243{
244 bridge_module = mod;
245
246 if (bridge_kmod_load() < 0)
247 return (-1);
248
249 if (bridge_ioctl_init() < 0)
250 return (-1);
251
252 /* Register to get creation messages for bridge interfaces. */
253 if (mib_register_newif(bridge_attach_newif, bridge_module)) {
254 syslog(LOG_ERR, "Cannot register newif function: %s",
255 strerror(errno));
256 return (-1);
257 }
258
259 return (0);
260}
261
262/*
263 * Bridge mib module finalization hook.
264 */
265static int
266bridge_fini(void)
267{
268 mib_unregister_newif(bridge_module);
269 or_unregister(reg_bridge);
270
271 if (bridge_data_timer != NULL) {
272 timer_stop(bridge_data_timer);
273 bridge_data_timer = NULL;
274 }
275
276 if (bridge_tc_timer != NULL) {
277 timer_stop(bridge_tc_timer);
278 bridge_tc_timer = NULL;
279 }
280
281 bridge_ifs_fini();
282 bridge_ports_fini();
283 bridge_addrs_fini();
284
285 return (0);
286}
287
288/*
289 * Bridge mib module start operation.
290 */
291static void
292bridge_start(void)
293{
294 reg_bridge = or_register(&oid_dot1Bridge,
295 "The IETF MIB for Bridges (RFC 4188).", bridge_module);
296
297 bridge_data_timer = timer_start_repeat(bridge_poll_ticks,
298 bridge_poll_ticks, bridge_update_all, NULL, bridge_module);
299
300 bridge_tc_timer = timer_start_repeat(bridge_tc_poll_ticks,
301 bridge_tc_poll_ticks, bridge_update_tc_time, NULL, bridge_module);
302}
303
304static void
305bridge_dump(void)
306{
307 struct bridge_if *bif;
308
309 if ((bif = bridge_get_default()) == NULL)
310 syslog(LOG_ERR, "Dump: no default bridge interface");
311 else
312 syslog(LOG_ERR, "Dump: default bridge interface %s",
313 bif->bif_name);
314
315 bridge_ifs_dump();
316 bridge_pf_dump();
317}
318
319const struct snmp_module config = {
320 .comment = "This module implements the bridge mib (RFC 4188).",
321 .init = bridge_init,
322 .fini = bridge_fini,
323 .start = bridge_start,
324 .tree = bridge_ctree,
325 .dump = bridge_dump,
326 .tree_size = bridge_CTREE_SIZE,
327};
| 212 ctx->scratch->int1 = val->v.integer;
213 break;
214 }
215 return (SNMP_ERR_NOERROR);
216
217 case SNMP_OP_ROLLBACK:
218 switch (val->var.subs[sub - 1]) {
219 case LEAF_begemotBridgeDefaultBridgeIf:
220 bridge_set_default_name(ctx->scratch->ptr1,
221 ctx->scratch->int1);
222 free(ctx->scratch->ptr1);
223 break;
224 case LEAF_begemotBridgeDataUpdate:
225 bridge_data_maxage = ctx->scratch->int1;
226 break;
227 }
228 return (SNMP_ERR_NOERROR);
229
230 case SNMP_OP_COMMIT:
231 switch (val->var.subs[sub - 1]) {
232 case LEAF_begemotBridgeDefaultBridgeIf:
233 free(ctx->scratch->ptr1);
234 break;
235 case LEAF_begemotBridgeDataPoll:
236 bridge_set_poll_ticks(ctx->scratch->int1 * 100);
237 break;
238 }
239 return (SNMP_ERR_NOERROR);
240 }
241
242 return (SNMP_ERR_NOERROR);
243}
244
245/*
246 * Bridge mib module initialization hook.
247 * Returns 0 on success, < 0 on error.
248 */
249static int
250bridge_init(struct lmodule * mod, int argc __unused, char *argv[] __unused)
251{
252 bridge_module = mod;
253
254 if (bridge_kmod_load() < 0)
255 return (-1);
256
257 if (bridge_ioctl_init() < 0)
258 return (-1);
259
260 /* Register to get creation messages for bridge interfaces. */
261 if (mib_register_newif(bridge_attach_newif, bridge_module)) {
262 syslog(LOG_ERR, "Cannot register newif function: %s",
263 strerror(errno));
264 return (-1);
265 }
266
267 return (0);
268}
269
270/*
271 * Bridge mib module finalization hook.
272 */
273static int
274bridge_fini(void)
275{
276 mib_unregister_newif(bridge_module);
277 or_unregister(reg_bridge);
278
279 if (bridge_data_timer != NULL) {
280 timer_stop(bridge_data_timer);
281 bridge_data_timer = NULL;
282 }
283
284 if (bridge_tc_timer != NULL) {
285 timer_stop(bridge_tc_timer);
286 bridge_tc_timer = NULL;
287 }
288
289 bridge_ifs_fini();
290 bridge_ports_fini();
291 bridge_addrs_fini();
292
293 return (0);
294}
295
296/*
297 * Bridge mib module start operation.
298 */
299static void
300bridge_start(void)
301{
302 reg_bridge = or_register(&oid_dot1Bridge,
303 "The IETF MIB for Bridges (RFC 4188).", bridge_module);
304
305 bridge_data_timer = timer_start_repeat(bridge_poll_ticks,
306 bridge_poll_ticks, bridge_update_all, NULL, bridge_module);
307
308 bridge_tc_timer = timer_start_repeat(bridge_tc_poll_ticks,
309 bridge_tc_poll_ticks, bridge_update_tc_time, NULL, bridge_module);
310}
311
312static void
313bridge_dump(void)
314{
315 struct bridge_if *bif;
316
317 if ((bif = bridge_get_default()) == NULL)
318 syslog(LOG_ERR, "Dump: no default bridge interface");
319 else
320 syslog(LOG_ERR, "Dump: default bridge interface %s",
321 bif->bif_name);
322
323 bridge_ifs_dump();
324 bridge_pf_dump();
325}
326
327const struct snmp_module config = {
328 .comment = "This module implements the bridge mib (RFC 4188).",
329 .init = bridge_init,
330 .fini = bridge_fini,
331 .start = bridge_start,
332 .tree = bridge_ctree,
333 .dump = bridge_dump,
334 .tree_size = bridge_CTREE_SIZE,
335};
|