-
Notifications
You must be signed in to change notification settings - Fork 36
/
mini-snmpd.h
387 lines (323 loc) · 11.9 KB
/
mini-snmpd.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
/*
* Copyright (C) 2008-2010 Robert Ernst <robert.ernst@linux-solutions.at>
* Copyright (C) 2015-2020 Joachim Nilsson <troglobit@gmail.com>
*
* This file may be distributed and/or modified under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation and appearing in the file LICENSE.GPL included in the
* packaging of this file.
*
* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
* WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* See COPYING for GPL licensing information.
*/
#ifndef MINI_SNMPD_H_
#define MINI_SNMPD_H_
#include "config.h"
#include <errno.h>
#include <stdint.h>
#include <syslog.h>
#include <signal.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "compat.h"
/*
* Project dependent defines
*/
#define EXIT_OK 0
#define EXIT_ARGS 1
#define EXIT_SYSCALL 2
#define MAX_NR_CLIENTS 16
#define MAX_NR_OIDS 20
#define MAX_NR_SUBIDS 20
#define MAX_NR_DISKS 4
#define MAX_NR_INTERFACES 8
#define MAX_NR_VALUES 2048
#define MAX_PACKET_SIZE 2048
#define MAX_STRING_SIZE 64
/*
* SNMP dependent defines
*/
#define BER_TYPE_BOOLEAN 0x01
#define BER_TYPE_INTEGER 0x02
#define BER_TYPE_BIT_STRING 0x03
#define BER_TYPE_OCTET_STRING 0x04
#define BER_TYPE_NULL 0x05
#define BER_TYPE_OID 0x06
#define BER_TYPE_SEQUENCE 0x30
#define BER_TYPE_IP_ADDRESS 0x40
#define BER_TYPE_COUNTER 0x41
#define BER_TYPE_GAUGE 0x42
#define BER_TYPE_TIME_TICKS 0x43
#define BER_TYPE_COUNTER64 0x46
#define BER_TYPE_NO_SUCH_OBJECT 0x80
#define BER_TYPE_NO_SUCH_INSTANCE 0x81
#define BER_TYPE_END_OF_MIB_VIEW 0x82
#define BER_TYPE_SNMP_GET 0xA0
#define BER_TYPE_SNMP_GETNEXT 0xA1
#define BER_TYPE_SNMP_RESPONSE 0xA2
#define BER_TYPE_SNMP_SET 0xA3
#define BER_TYPE_SNMP_GETBULK 0xA5
#define BER_TYPE_SNMP_INFORM 0xA6
#define BER_TYPE_SNMP_TRAP 0xA7
#define BER_TYPE_SNMP_REPORT 0xA8
#define SNMP_VERSION_1 0
#define SNMP_VERSION_2C 1
#define SNMP_VERSION_3 3
#define SNMP_STATUS_OK 0
#define SNMP_STATUS_TOO_BIG 1
#define SNMP_STATUS_NO_SUCH_NAME 2
#define SNMP_STATUS_BAD_VALUE 3
#define SNMP_STATUS_READ_ONLY 4
#define SNMP_STATUS_GEN_ERR 5
#define SNMP_STATUS_NO_ACCESS 6
#define SNMP_STATUS_WRONG_TYPE 7
#define SNMP_STATUS_WRONG_LENGTH 8
#define SNMP_STATUS_WRONG_ENCODING 9
#define SNMP_STATUS_WRONG_VALUE 10
#define SNMP_STATUS_NO_CREATION 11
#define SNMP_STATUS_INCONSISTENT_VALUE 12
#define SNMP_STATUS_RESOURCE_UNAVAILABLE 13
#define SNMP_STATUS_COMMIT_FAILED 14
#define SNMP_STATUS_UNDO_FAILED 15
#define SNMP_STATUS_AUTHORIZATION_ERROR 16
#define SNMP_STATUS_NOT_WRITABLE 17
#define SNMP_STATUS_INCONSISTENT_NAME 18
#define PROGRAM_IDENT PACKAGE_NAME " v" PACKAGE_VERSION
#ifndef CONFIG_ENABLE_IPV6
#define my_sockaddr_t struct sockaddr_in
#define my_socklen_t socklen_t
#define my_sin_addr sin_addr
#define my_sin_port sin_port
#define my_sin_family sin_family
#define my_af_inet AF_INET
#define my_pf_inet PF_INET
#define my_in_addr_t struct in_addr
#define my_in_port_t in_port_t
#define my_inet_addrstrlen INET_ADDRSTRLEN
#else /* IPv6 */
#define my_sockaddr_t struct sockaddr_in6
#define my_socklen_t socklen_t
#define my_sin_addr sin6_addr
#define my_sin_port sin6_port
#define my_sin_family sin6_family
#define my_af_inet AF_INET6
#define my_pf_inet PF_INET6
#define my_in_addr_t struct in6_addr
#define my_in_port_t in_port_t
#define my_inet_addrstrlen INET6_ADDRSTRLEN
#endif/* CONFIG_ENABLE_IPV6 */
/*
* Data types
*/
typedef struct client_s {
time_t timestamp;
int sockfd;
my_in_addr_t addr;
my_in_port_t port;
unsigned char packet[MAX_PACKET_SIZE];
size_t size;
int outgoing;
} client_t;
typedef struct oid_s {
unsigned int subid_list[MAX_NR_SUBIDS];
size_t subid_list_length;
short encoded_length;
} oid_t;
typedef struct data_s {
unsigned char *buffer;
size_t max_length;
short encoded_length;
} data_t;
typedef struct value_s {
oid_t oid;
data_t data;
} value_t;
typedef struct field_s {
char *prefix;
size_t len;
long long *value[24];
} field_t;
typedef struct request_s {
char community[MAX_STRING_SIZE];
int type;
int version;
int id;
uint32_t non_repeaters;
uint32_t max_repetitions;
oid_t oid_list[MAX_NR_OIDS];
size_t oid_list_length;
} request_t;
typedef struct response_s {
int error_status;
int error_index;
value_t value_list[MAX_NR_VALUES];
size_t value_list_length;
} response_t;
typedef struct loadinfo_s {
unsigned int avg[3];
} loadinfo_t;
typedef struct meminfo_s {
long long total;
long long free;
long long shared;
long long buffers;
long long cached;
} meminfo_t;
typedef struct cpuinfo_s {
long long user;
long long nice;
long long system;
long long idle;
long long irqs;
long long cntxts;
} cpuinfo_t;
typedef struct diskinfo_s {
unsigned int total[MAX_NR_DISKS];
unsigned int free[MAX_NR_DISKS];
unsigned int used[MAX_NR_DISKS];
unsigned int blocks_used_percent[MAX_NR_DISKS];
unsigned int inodes_used_percent[MAX_NR_DISKS];
} diskinfo_t;
typedef struct netinfo_s {
unsigned int in_addr[MAX_NR_INTERFACES];
unsigned int in_mask[MAX_NR_INTERFACES];
unsigned int in_bcaddr[MAX_NR_INTERFACES];
unsigned int in_bcent[MAX_NR_INTERFACES];
unsigned int if_type[MAX_NR_INTERFACES];
unsigned int if_mtu[MAX_NR_INTERFACES];
unsigned int if_speed[MAX_NR_INTERFACES];
unsigned int ifindex[MAX_NR_INTERFACES];
unsigned int status[MAX_NR_INTERFACES];
unsigned int lastchange[MAX_NR_INTERFACES];
unsigned int stats[MAX_NR_INTERFACES]; /* Sentinel for backends */
long long rx_bytes[MAX_NR_INTERFACES];
long long rx_mc_packets[MAX_NR_INTERFACES];
long long rx_bc_packets[MAX_NR_INTERFACES];
long long rx_packets[MAX_NR_INTERFACES];
long long rx_errors[MAX_NR_INTERFACES];
long long rx_drops[MAX_NR_INTERFACES];
long long tx_bytes[MAX_NR_INTERFACES];
long long tx_mc_packets[MAX_NR_INTERFACES];
long long tx_bc_packets[MAX_NR_INTERFACES];
long long tx_packets[MAX_NR_INTERFACES];
long long tx_errors[MAX_NR_INTERFACES];
long long tx_drops[MAX_NR_INTERFACES];
char mac_addr[MAX_NR_INTERFACES][6];
} netinfo_t;
typedef struct ipinfo_s {
long long ipForwarding;
long long ipDefaultTTL;
long long ipReasmTimeout;
} ipinfo_t;
typedef struct tcpinfo_s {
long long tcpRtoAlgorithm;
long long tcpRtoMin;
long long tcpRtoMax;
long long tcpMaxConn;
long long tcpActiveOpens;
long long tcpPassiveOpens;
long long tcpAttemptFails;
long long tcpEstabResets;
long long tcpCurrEstab;
long long tcpInSegs;
long long tcpOutSegs;
long long tcpRetransSegs;
long long tcpInErrs;
long long tcpOutRsts;
} tcpinfo_t;
typedef struct udpinfo_s {
long long udpInDatagrams;
long long udpNoPorts;
long long udpInErrors;
long long udpOutDatagrams;
} udpinfo_t;
#ifdef CONFIG_ENABLE_DEMO
typedef struct demoinfo_s {
unsigned int random_value_1;
unsigned int random_value_2;
} demoinfo_t;
#endif
/*
* Global variables
*/
extern const struct in_addr inaddr_any;
extern int g_family;
extern int g_timeout;
extern int g_auth;
extern int g_daemon;
extern int g_syslog;
extern int g_level;
extern volatile sig_atomic_t g_quit;
extern char *g_prognm;
extern char *g_community;
extern char *g_description;
extern char *g_vendor;
extern char *g_location;
extern char *g_contact;
extern char *g_bind_to_device;
extern char *g_user;
extern char *g_disk_list[MAX_NR_DISKS];
extern size_t g_disk_list_length;
extern char *g_interface_list[MAX_NR_INTERFACES];
extern size_t g_interface_list_length;
extern in_port_t g_udp_port;
extern in_port_t g_tcp_port;
extern client_t g_udp_client;
extern client_t *g_tcp_client_list[MAX_NR_CLIENTS];
extern size_t g_tcp_client_list_length;
extern int g_udp_sockfd;
extern int g_tcp_sockfd;
extern value_t g_mib[MAX_NR_VALUES];
extern size_t g_mib_length;
/*
* Functions
*/
void dump_packet (const client_t *client);
void dump_mib (const value_t *value, int size);
void dump_response (const response_t *response);
char *oid_ntoa (const oid_t *oid);
oid_t *oid_aton (const char *str);
int oid_cmp (const oid_t *oid1, const oid_t *oid2);
int split(const char *str, char *delim, char **list, int max_list_length);
client_t *find_oldest_client(void);
int find_ifname(char *ifname);
void *allocate (size_t len);
int read_config (char *file);
int parse_file (char *file, field_t fields[], size_t limit, size_t skip_prefix);
int read_file (const char *filename, char *buffer, size_t size);
unsigned int read_value (const char *buffer, const char *prefix);
void read_values (const char *buffer, const char *prefix, unsigned int *values, int count);
int read_file_value(unsigned int *val, const char *fmt, ...);
int ticks_since (const struct timeval *tv_last, struct timeval *tv_now);
unsigned int get_process_uptime (void);
unsigned int get_system_uptime (void);
void get_loadinfo (loadinfo_t *loadinfo);
void get_meminfo (meminfo_t *meminfo);
void get_cpuinfo (cpuinfo_t *cpuinfo);
void get_ipinfo (ipinfo_t *ipinfo);
void get_tcpinfo (tcpinfo_t *tcpinfo);
void get_udpinfo (udpinfo_t *udpinfo);
void get_diskinfo (diskinfo_t *diskinfo);
void get_netinfo (netinfo_t *netinfo);
#ifdef CONFIG_ENABLE_DEMO
void get_demoinfo (demoinfo_t *demoinfo);
#endif
int logit (int priority, int syserr, const char *fmt, ...);
int snmp_packet_complete (const client_t *client);
int snmp ( client_t *client);
int snmp_element_as_string (const data_t *data, char *buffer, size_t size);
int mib_build (void);
int mib_update (int full);
value_t *mib_find (const oid_t *oid, size_t *pos);
value_t *mib_findnext (const oid_t *oid);
#ifdef CONFIG_ENABLE_ETHTOOL
int ethtool_gstats(int intf, netinfo_t *netinfo, field_t *field);
#else
#define ethtool_gstats(intf, netinfo, field) (-1)
#endif
#endif /* MINI_SNMPD_H_ */
/* vim: ts=4 sts=4 sw=4 nowrap
*/