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
|
/*
* Host Resources MIB - Device group implementation - hr_device.c
*
*/
/* Portions of this file are subject to the following copyright(s). See
* the Net-SNMP's COPYING file for more details and other copyrights
* that may apply:
*/
/*
* Portions of this file are copyrighted by:
* Copyright © 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms specified in the COPYING file
* distributed with the Net-SNMP package.
*/
#include <net-snmp/net-snmp-config.h>
#if HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#include "host_res.h"
#include "hr_device.h"
/*********************
*
* Kernel & interface information,
* and internal forward declarations
*
*********************/
int Get_Next_Device(void);
PFV init_device[HRDEV_TYPE_MAX];
PFIV next_device[HRDEV_TYPE_MAX];
PFV save_device[HRDEV_TYPE_MAX];
int dev_idx_inc[HRDEV_TYPE_MAX];
PFS device_descr[HRDEV_TYPE_MAX];
PFO device_prodid[HRDEV_TYPE_MAX];
PFI device_status[HRDEV_TYPE_MAX];
PFI device_errors[HRDEV_TYPE_MAX];
int current_type;
void Init_Device(void);
int header_hrdevice(struct variable *, oid *, size_t *, int,
size_t *, WriteMethod **);
/*********************
*
* Initialisation & common implementation functions
*
*********************/
#define HRDEV_INDEX 1
#define HRDEV_TYPE 2
#define HRDEV_DESCR 3
#define HRDEV_ID 4
#define HRDEV_STATUS 5
#define HRDEV_ERRORS 6
struct variable4 hrdevice_variables[] = {
{HRDEV_INDEX, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_hrdevice, 2, {1, 1}},
{HRDEV_TYPE, ASN_OBJECT_ID, NETSNMP_OLDAPI_RONLY,
var_hrdevice, 2, {1, 2}},
{HRDEV_DESCR, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY,
var_hrdevice, 2, {1, 3}},
{HRDEV_ID, ASN_OBJECT_ID, NETSNMP_OLDAPI_RONLY,
var_hrdevice, 2, {1, 4}},
{HRDEV_STATUS, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_hrdevice, 2, {1, 5}},
{HRDEV_ERRORS, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
var_hrdevice, 2, {1, 6}}
};
oid hrdevice_variables_oid[] = { 1, 3, 6, 1, 2, 1, 25, 3, 2 };
void
init_hr_device(void)
{
int i;
/*
* Initially assume no devices
* Insert pointers to initialisation/get_next routines
* for particular device types as they are implemented
* (set up in the appropriate 'init_*()' routine )
*/
for (i = 0; i < HRDEV_TYPE_MAX; ++i) {
init_device[i] = NULL;
next_device[i] = NULL;
save_device[i] = NULL;
dev_idx_inc[i] = 0; /* Assume random indices */
device_descr[i] = NULL;
device_prodid[i] = NULL;
device_status[i] = NULL;
device_errors[i] = NULL;
}
REGISTER_MIB("host/hr_device", hrdevice_variables, variable4,
hrdevice_variables_oid);
}
/*
* header_hrdevice(...
* Arguments:
* vp IN - pointer to variable entry that points here
* name IN/OUT - IN/name requested, OUT/name found
* length IN/OUT - length of IN/OUT oid's
* exact IN - TRUE if an exact match was requested
* var_len OUT - length of variable or 0 if function returned
* write_method
*
*/
int
header_hrdevice(struct variable *vp,
oid * name,
size_t * length,
int exact, size_t * var_len, WriteMethod ** write_method)
{
#define HRDEV_ENTRY_NAME_LENGTH 11
oid newname[MAX_OID_LEN];
int dev_idx, LowIndex = -1, LowType = -1;
int result;
DEBUGMSGTL(("host/hr_device", "var_hrdevice: "));
DEBUGMSGOID(("host/hr_device", name, *length));
DEBUGMSG(("host/hr_device", " %d\n", exact));
memcpy((char *) newname, (char *) vp->name,
(int) vp->namelen * sizeof(oid));
/*
* Find the "next" device entry.
* If we're in the middle of the table, then there's
* no point in examining earlier types of devices,
* so set the starting type to that of the variable
* being queried.
* If we've moved from one column of the table to another,
* then we need to start at the beginning again.
* (i.e. the 'compare' fails to match)
* Similarly if we're at the start of the table
* (i.e. *length is too short to be a full instance)
*/
if ((snmp_oid_compare(vp->name, vp->namelen, name, vp->namelen) == 0)
&& (*length > HRDEV_ENTRY_NAME_LENGTH))
current_type = (name[HRDEV_ENTRY_NAME_LENGTH] >> HRDEV_TYPE_SHIFT);
else
current_type = 0;
Init_Device();
for (;;) {
dev_idx = Get_Next_Device();
DEBUGMSG(("host/hr_device", "(index %d ....", dev_idx));
if (dev_idx == -1)
break;
if (LowType != -1 && LowType < (dev_idx >> HRDEV_TYPE_SHIFT))
break;
newname[HRDEV_ENTRY_NAME_LENGTH] = dev_idx;
DEBUGMSGOID(("host/hr_device", newname, *length));
DEBUGMSG(("host/hr_device", "\n"));
result = snmp_oid_compare(name, *length, newname, vp->namelen + 1);
if (exact && (result == 0)) {
if (save_device[current_type] != NULL)
(*save_device[current_type]) ();
LowIndex = dev_idx;
break;
}
if ((!exact && (result < 0)) &&
(LowIndex == -1 || dev_idx < LowIndex)) {
if (save_device[current_type] != NULL)
(*save_device[current_type]) ();
LowIndex = dev_idx;
LowType = (dev_idx >> HRDEV_TYPE_SHIFT);
if (dev_idx_inc[LowType]) /* Increasing indices => now done */
break;
}
}
if (LowIndex == -1) {
DEBUGMSGTL(("host/hr_device", "... index out of range\n"));
return (MATCH_FAILED);
}
newname[HRDEV_ENTRY_NAME_LENGTH] = LowIndex;
memcpy((char *) name, (char *) newname,
((int) vp->namelen + 1) * sizeof(oid));
*length = vp->namelen + 1;
*write_method = (WriteMethod*)0;
*var_len = sizeof(long); /* default to 'long' results */
DEBUGMSGTL(("host/hr_device", "... get device stats "));
DEBUGMSGOID(("host/hr_device", name, *length));
DEBUGMSG(("host/hr_device", "\n"));
return LowIndex;
}
oid device_type_id[] = { 1, 3, 6, 1, 2, 1, 25, 3, 1, 99 }; /* hrDeviceType99 */
int device_type_len =
sizeof(device_type_id) / sizeof(device_type_id[0]);
/*********************
*
* System specific implementation functions
*
*********************/
u_char *
var_hrdevice(struct variable *vp,
oid * name,
size_t * length,
int exact, size_t * var_len, WriteMethod ** write_method)
{
int dev_idx, type;
oid *oid_p;
const char *tmp_str;
static char string[1024];
really_try_next:
dev_idx =
header_hrdevice(vp, name, length, exact, var_len, write_method);
if (dev_idx == MATCH_FAILED)
return NULL;
type = (dev_idx >> HRDEV_TYPE_SHIFT);
switch (vp->magic) {
case HRDEV_INDEX:
long_return = dev_idx;
return (u_char *) & long_return;
case HRDEV_TYPE:
device_type_id[device_type_len - 1] = type;
*var_len = sizeof(device_type_id);
return (u_char *) device_type_id;
case HRDEV_DESCR:
if ((device_descr[type] != NULL) &&
(NULL!=(tmp_str=((*device_descr[type])(dev_idx))))) {
strlcpy(string, tmp_str, sizeof(string));
} else
#if NETSNMP_NO_DUMMY_VALUES
goto try_next;
#else
sprintf(string, "a black box of some sort");
#endif
*var_len = strlen(string);
return (u_char *) string;
case HRDEV_ID:
if (device_prodid[type] != NULL)
oid_p = ((*device_prodid[type]) (dev_idx, var_len));
else {
oid_p = nullOid;
*var_len = nullOidLen;
}
return (u_char *) oid_p;
case HRDEV_STATUS:
if (device_status[type] != NULL)
long_return = ((*device_status[type]) (dev_idx));
else
#if NETSNMP_NO_DUMMY_VALUES
goto try_next;
#else
long_return = 2; /* Assume running */
#endif
if ( !long_return )
goto try_next;
return (u_char *) & long_return;
case HRDEV_ERRORS:
if (device_errors[type] != NULL)
long_return = (*device_errors[type]) (dev_idx);
else
#if NETSNMP_NO_DUMMY_VALUES
goto try_next;
#else
long_return = 0; /* Assume OK */
#endif
return (u_char *) & long_return;
default:
DEBUGMSGTL(("snmpd", "unknown sub-id %d in var_hrdevice\n",
vp->magic));
}
try_next:
if (!exact)
goto really_try_next;
return NULL;
}
/*********************
*
* Internal implementation functions
*
*********************/
void
Init_Device(void)
{
/*
* Find the first non-NULL initialisation function
* and call it
*/
while (current_type < HRDEV_TYPE_MAX &&
init_device[current_type] == NULL)
if (++current_type >= HRDEV_TYPE_MAX)
return;
/* Check current_type, if >= MAX first time into loop, would fail below */
if (current_type < HRDEV_TYPE_MAX)
(*init_device[current_type]) ();
}
int
Get_Next_Device(void)
{
int result = -1;
/*
* Call the 'next device' function for the current
* type of device
*
* TODO: save the necessary information about that device
*/
if (current_type < HRDEV_TYPE_MAX && next_device[current_type] != NULL)
result = (*next_device[current_type]) ();
/*
* No more devices of the current type.
* Try the next type (if any)
*/
if (result == -1) {
if (++current_type >= HRDEV_TYPE_MAX) {
current_type = 0;
return -1;
}
Init_Device();
return Get_Next_Device();
}
return result;
}
|