1 /**
2 * collectd - src/snmp.c
3 * Copyright (C) 2007 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 **/
22 #include "collectd.h"
23 #include "common.h"
24 #include "plugin.h"
26 #include <pthread.h>
28 #include <net-snmp/net-snmp-config.h>
29 #include <net-snmp/net-snmp-includes.h>
31 /*
32 * Private data structes
33 */
34 struct oid_s
35 {
36 oid oid[MAX_OID_LEN];
37 size_t oid_len;
38 };
39 typedef struct oid_s oid_t;
41 union instance_u
42 {
43 char string[DATA_MAX_NAME_LEN];
44 oid_t oid;
45 };
46 typedef union instance_u instance_t;
48 struct data_definition_s
49 {
50 char *name; /* used to reference this from the `Collect' option */
51 char *type; /* used to find the data_set */
52 int is_table;
53 instance_t instance;
54 char *instance_prefix;
55 oid_t *values;
56 int values_len;
57 double scale;
58 double shift;
59 struct data_definition_s *next;
60 };
61 typedef struct data_definition_s data_definition_t;
63 struct host_definition_s
64 {
65 char *name;
66 char *address;
67 char *community;
68 int version;
69 void *sess_handle;
70 uint32_t interval;
71 time_t next_update;
72 data_definition_t **data_list;
73 int data_list_len;
74 enum /******************************************************/
75 { /* This host.. */
76 STATE_IDLE, /* - just sits there until `next_update < interval_g' */
77 STATE_WAIT, /* - waits to be queried. */
78 STATE_BUSY /* - is currently being queried. */
79 } state; /******************************************************/
80 struct host_definition_s *next;
81 };
82 typedef struct host_definition_s host_definition_t;
84 /* These two types are used to cache values in `csnmp_read_table' to handle
85 * gaps in tables. */
86 struct csnmp_list_instances_s
87 {
88 oid subid;
89 char instance[DATA_MAX_NAME_LEN];
90 struct csnmp_list_instances_s *next;
91 };
92 typedef struct csnmp_list_instances_s csnmp_list_instances_t;
94 struct csnmp_table_values_s
95 {
96 oid subid;
97 value_t value;
98 struct csnmp_table_values_s *next;
99 };
100 typedef struct csnmp_table_values_s csnmp_table_values_t;
102 /*
103 * Private variables
104 */
105 static int do_shutdown = 0;
107 pthread_t *threads = NULL;
108 int threads_num = 0;
110 static data_definition_t *data_head = NULL;
111 static host_definition_t *host_head = NULL;
113 static pthread_mutex_t host_lock = PTHREAD_MUTEX_INITIALIZER;
114 static pthread_cond_t host_cond = PTHREAD_COND_INITIALIZER;
116 /*
117 * Private functions
118 */
119 /* First there are many functions which do configuration stuff. It's a big
120 * bloated and messy, I'm afraid. */
122 /*
123 * Callgraph for the config stuff:
124 * csnmp_config
125 * +-> call_snmp_init_once
126 * +-> csnmp_config_add_data
127 * ! +-> csnmp_config_add_data_type
128 * ! +-> csnmp_config_add_data_table
129 * ! +-> csnmp_config_add_data_instance
130 * ! +-> csnmp_config_add_data_instance_prefix
131 * ! +-> csnmp_config_add_data_values
132 * +-> csnmp_config_add_host
133 * +-> csnmp_config_add_host_address
134 * +-> csnmp_config_add_host_community
135 * +-> csnmp_config_add_host_version
136 * +-> csnmp_config_add_host_collect
137 * +-> csnmp_config_add_host_interval
138 */
139 static void call_snmp_init_once (void)
140 {
141 static int have_init = 0;
143 if (have_init == 0)
144 init_snmp (PACKAGE_NAME);
145 have_init = 1;
146 } /* void call_snmp_init_once */
148 static int csnmp_config_add_data_type (data_definition_t *dd, oconfig_item_t *ci)
149 {
150 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
151 {
152 WARNING ("snmp plugin: `Type' needs exactly one string argument.");
153 return (-1);
154 }
156 sfree (dd->type);
157 dd->type = strdup (ci->values[0].value.string);
158 if (dd->type == NULL)
159 return (-1);
161 return (0);
162 } /* int csnmp_config_add_data_type */
164 static int csnmp_config_add_data_table (data_definition_t *dd, oconfig_item_t *ci)
165 {
166 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
167 {
168 WARNING ("snmp plugin: `Table' needs exactly one boolean argument.");
169 return (-1);
170 }
172 dd->is_table = ci->values[0].value.boolean ? 1 : 0;
174 return (0);
175 } /* int csnmp_config_add_data_table */
177 static int csnmp_config_add_data_instance (data_definition_t *dd, oconfig_item_t *ci)
178 {
179 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
180 {
181 WARNING ("snmp plugin: `Instance' needs exactly one string argument.");
182 return (-1);
183 }
185 if (dd->is_table)
186 {
187 /* Instance is an OID */
188 dd->instance.oid.oid_len = MAX_OID_LEN;
190 if (!read_objid (ci->values[0].value.string,
191 dd->instance.oid.oid, &dd->instance.oid.oid_len))
192 {
193 ERROR ("snmp plugin: read_objid (%s) failed.",
194 ci->values[0].value.string);
195 return (-1);
196 }
197 }
198 else
199 {
200 /* Instance is a simple string */
201 strncpy (dd->instance.string, ci->values[0].value.string, DATA_MAX_NAME_LEN - 1);
202 }
204 return (0);
205 } /* int csnmp_config_add_data_instance */
207 static int csnmp_config_add_data_instance_prefix (data_definition_t *dd,
208 oconfig_item_t *ci)
209 {
210 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
211 {
212 WARNING ("snmp plugin: `InstancePrefix' needs exactly one string argument.");
213 return (-1);
214 }
216 if (!dd->is_table)
217 {
218 WARNING ("snmp plugin: data %s: InstancePrefix is ignored when `Table' "
219 "is set to `false'.", dd->name);
220 return (-1);
221 }
223 sfree (dd->instance_prefix);
224 dd->instance_prefix = strdup (ci->values[0].value.string);
225 if (dd->instance_prefix == NULL)
226 return (-1);
228 return (0);
229 } /* int csnmp_config_add_data_instance_prefix */
231 static int csnmp_config_add_data_values (data_definition_t *dd, oconfig_item_t *ci)
232 {
233 int i;
235 if (ci->values_num < 1)
236 {
237 WARNING ("snmp plugin: `Values' needs at least one argument.");
238 return (-1);
239 }
241 for (i = 0; i < ci->values_num; i++)
242 if (ci->values[i].type != OCONFIG_TYPE_STRING)
243 {
244 WARNING ("snmp plugin: `Values' needs only string argument.");
245 return (-1);
246 }
248 sfree (dd->values);
249 dd->values_len = 0;
250 dd->values = (oid_t *) malloc (sizeof (oid_t) * ci->values_num);
251 if (dd->values == NULL)
252 return (-1);
253 dd->values_len = ci->values_num;
255 for (i = 0; i < ci->values_num; i++)
256 {
257 dd->values[i].oid_len = MAX_OID_LEN;
259 if (NULL == snmp_parse_oid (ci->values[i].value.string,
260 dd->values[i].oid, &dd->values[i].oid_len))
261 {
262 ERROR ("snmp plugin: snmp_parse_oid (%s) failed.",
263 ci->values[i].value.string);
264 free (dd->values);
265 dd->values = NULL;
266 dd->values_len = 0;
267 return (-1);
268 }
269 }
271 return (0);
272 } /* int csnmp_config_add_data_instance */
274 static int csnmp_config_add_data_shift (data_definition_t *dd, oconfig_item_t *ci)
275 {
276 if ((ci->values_num != 1)
277 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
278 {
279 WARNING ("snmp plugin: The `Scale' config option needs exactly one number argument.");
280 return (-1);
281 }
283 dd->shift = ci->values[0].value.number;
285 return (0);
286 } /* int csnmp_config_add_data_shift */
288 static int csnmp_config_add_data_scale (data_definition_t *dd, oconfig_item_t *ci)
289 {
290 if ((ci->values_num != 1)
291 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
292 {
293 WARNING ("snmp plugin: The `Scale' config option needs exactly one number argument.");
294 return (-1);
295 }
297 dd->scale = ci->values[0].value.number;
299 return (0);
300 } /* int csnmp_config_add_data_scale */
302 static int csnmp_config_add_data (oconfig_item_t *ci)
303 {
304 data_definition_t *dd;
305 int status = 0;
306 int i;
308 if ((ci->values_num != 1)
309 || (ci->values[0].type != OCONFIG_TYPE_STRING))
310 {
311 WARNING ("snmp plugin: The `Data' config option needs exactly one string argument.");
312 return (-1);
313 }
315 dd = (data_definition_t *) malloc (sizeof (data_definition_t));
316 if (dd == NULL)
317 return (-1);
318 memset (dd, '\0', sizeof (data_definition_t));
320 dd->name = strdup (ci->values[0].value.string);
321 if (dd->name == NULL)
322 {
323 free (dd);
324 return (-1);
325 }
326 dd->scale = 1.0;
327 dd->shift = 0.0;
329 for (i = 0; i < ci->children_num; i++)
330 {
331 oconfig_item_t *option = ci->children + i;
332 status = 0;
334 if (strcasecmp ("Type", option->key) == 0)
335 status = csnmp_config_add_data_type (dd, option);
336 else if (strcasecmp ("Table", option->key) == 0)
337 status = csnmp_config_add_data_table (dd, option);
338 else if (strcasecmp ("Instance", option->key) == 0)
339 status = csnmp_config_add_data_instance (dd, option);
340 else if (strcasecmp ("InstancePrefix", option->key) == 0)
341 status = csnmp_config_add_data_instance_prefix (dd, option);
342 else if (strcasecmp ("Values", option->key) == 0)
343 status = csnmp_config_add_data_values (dd, option);
344 else if (strcasecmp ("Shift", option->key) == 0)
345 status = csnmp_config_add_data_shift (dd, option);
346 else if (strcasecmp ("Scale", option->key) == 0)
347 status = csnmp_config_add_data_scale (dd, option);
348 else
349 {
350 WARNING ("snmp plugin: Option `%s' not allowed here.", option->key);
351 status = -1;
352 }
354 if (status != 0)
355 break;
356 } /* for (ci->children) */
358 while (status == 0)
359 {
360 if (dd->type == NULL)
361 {
362 WARNING ("snmp plugin: `Type' not given for data `%s'", dd->name);
363 status = -1;
364 break;
365 }
366 if (dd->values == NULL)
367 {
368 WARNING ("snmp plugin: No `Value' given for data `%s'", dd->name);
369 status = -1;
370 break;
371 }
373 break;
374 } /* while (status == 0) */
376 if (status != 0)
377 {
378 sfree (dd->name);
379 sfree (dd->instance_prefix);
380 sfree (dd->values);
381 sfree (dd);
382 return (-1);
383 }
385 DEBUG ("snmp plugin: dd = { name = %s, type = %s, is_table = %s, values_len = %i }",
386 dd->name, dd->type, (dd->is_table != 0) ? "true" : "false", dd->values_len);
388 if (data_head == NULL)
389 data_head = dd;
390 else
391 {
392 data_definition_t *last;
393 last = data_head;
394 while (last->next != NULL)
395 last = last->next;
396 last->next = dd;
397 }
399 return (0);
400 } /* int csnmp_config_add_data */
402 static int csnmp_config_add_host_address (host_definition_t *hd, oconfig_item_t *ci)
403 {
404 if ((ci->values_num != 1)
405 || (ci->values[0].type != OCONFIG_TYPE_STRING))
406 {
407 WARNING ("snmp plugin: The `Address' config option needs exactly one string argument.");
408 return (-1);
409 }
411 if (hd->address == NULL)
412 free (hd->address);
414 hd->address = strdup (ci->values[0].value.string);
415 if (hd->address == NULL)
416 return (-1);
418 DEBUG ("snmp plugin: host = %s; host->address = %s;",
419 hd->name, hd->address);
421 return (0);
422 } /* int csnmp_config_add_host_address */
424 static int csnmp_config_add_host_community (host_definition_t *hd, oconfig_item_t *ci)
425 {
426 if ((ci->values_num != 1)
427 || (ci->values[0].type != OCONFIG_TYPE_STRING))
428 {
429 WARNING ("snmp plugin: The `Community' config option needs exactly one string argument.");
430 return (-1);
431 }
433 if (hd->community == NULL)
434 free (hd->community);
436 hd->community = strdup (ci->values[0].value.string);
437 if (hd->community == NULL)
438 return (-1);
440 DEBUG ("snmp plugin: host = %s; host->community = %s;",
441 hd->name, hd->community);
443 return (0);
444 } /* int csnmp_config_add_host_community */
446 static int csnmp_config_add_host_version (host_definition_t *hd, oconfig_item_t *ci)
447 {
448 int version;
450 if ((ci->values_num != 1)
451 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
452 {
453 WARNING ("snmp plugin: The `Version' config option needs exactly one number argument.");
454 return (-1);
455 }
457 version = (int) ci->values[0].value.number;
458 if ((version != 1) && (version != 2))
459 {
460 WARNING ("snmp plugin: `Version' must either be `1' or `2'.");
461 return (-1);
462 }
464 hd->version = version;
466 return (0);
467 } /* int csnmp_config_add_host_address */
469 static int csnmp_config_add_host_collect (host_definition_t *host,
470 oconfig_item_t *ci)
471 {
472 data_definition_t *data;
473 data_definition_t **data_list;
474 int data_list_len;
475 int i;
477 if (ci->values_num < 1)
478 {
479 WARNING ("snmp plugin: `Collect' needs at least one argument.");
480 return (-1);
481 }
483 for (i = 0; i < ci->values_num; i++)
484 if (ci->values[i].type != OCONFIG_TYPE_STRING)
485 {
486 WARNING ("snmp plugin: All arguments to `Collect' must be strings.");
487 return (-1);
488 }
490 data_list_len = host->data_list_len + ci->values_num;
491 data_list = (data_definition_t **) realloc (host->data_list,
492 sizeof (data_definition_t *) * data_list_len);
493 if (data_list == NULL)
494 return (-1);
495 host->data_list = data_list;
497 for (i = 0; i < ci->values_num; i++)
498 {
499 for (data = data_head; data != NULL; data = data->next)
500 if (strcasecmp (ci->values[i].value.string, data->name) == 0)
501 break;
503 if (data == NULL)
504 {
505 WARNING ("snmp plugin: No such data configured: `%s'",
506 ci->values[i].value.string);
507 continue;
508 }
510 DEBUG ("snmp plugin: Collect: host = %s, data[%i] = %s;",
511 host->name, host->data_list_len, data->name);
513 host->data_list[host->data_list_len] = data;
514 host->data_list_len++;
515 } /* for (values_num) */
517 return (0);
518 } /* int csnmp_config_add_host_collect */
520 static int csnmp_config_add_host_interval (host_definition_t *hd, oconfig_item_t *ci)
521 {
522 if ((ci->values_num != 1)
523 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
524 {
525 WARNING ("snmp plugin: The `Interval' config option needs exactly one number argument.");
526 return (-1);
527 }
529 hd->interval = (int) ci->values[0].value.number;
530 if (hd->interval < 0)
531 hd->interval = 0;
533 return (0);
534 } /* int csnmp_config_add_host_interval */
536 static int csnmp_config_add_host (oconfig_item_t *ci)
537 {
538 host_definition_t *hd;
539 int status = 0;
540 int i;
542 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
543 {
544 WARNING ("snmp plugin: `Host' needs exactly one string argument.");
545 return (-1);
546 }
548 hd = (host_definition_t *) malloc (sizeof (host_definition_t));
549 if (hd == NULL)
550 return (-1);
551 memset (hd, '\0', sizeof (host_definition_t));
552 hd->version = 2;
554 hd->name = strdup (ci->values[0].value.string);
555 if (hd->name == NULL)
556 {
557 free (hd);
558 return (-1);
559 }
561 hd->sess_handle = NULL;
562 hd->interval = 0;
563 hd->next_update = 0;
564 hd->state = STATE_IDLE;
566 for (i = 0; i < ci->children_num; i++)
567 {
568 oconfig_item_t *option = ci->children + i;
569 status = 0;
571 if (strcasecmp ("Address", option->key) == 0)
572 status = csnmp_config_add_host_address (hd, option);
573 else if (strcasecmp ("Community", option->key) == 0)
574 status = csnmp_config_add_host_community (hd, option);
575 else if (strcasecmp ("Version", option->key) == 0)
576 status = csnmp_config_add_host_version (hd, option);
577 else if (strcasecmp ("Collect", option->key) == 0)
578 csnmp_config_add_host_collect (hd, option);
579 else if (strcasecmp ("Interval", option->key) == 0)
580 csnmp_config_add_host_interval (hd, option);
581 else
582 {
583 WARNING ("snmp plugin: csnmp_config_add_host: Option `%s' not allowed here.", option->key);
584 status = -1;
585 }
587 if (status != 0)
588 break;
589 } /* for (ci->children) */
591 while (status == 0)
592 {
593 if (hd->address == NULL)
594 {
595 WARNING ("snmp plugin: `Address' not given for host `%s'", hd->name);
596 status = -1;
597 break;
598 }
599 if (hd->community == NULL)
600 {
601 WARNING ("snmp plugin: `Community' not given for host `%s'", hd->name);
602 status = -1;
603 break;
604 }
606 break;
607 } /* while (status == 0) */
609 if (status != 0)
610 {
611 sfree (hd->name);
612 sfree (hd);
613 return (-1);
614 }
616 DEBUG ("snmp plugin: hd = { name = %s, address = %s, community = %s, version = %i }",
617 hd->name, hd->address, hd->community, hd->version);
619 if (host_head == NULL)
620 host_head = hd;
621 else
622 {
623 host_definition_t *last;
624 last = host_head;
625 while (last->next != NULL)
626 last = last->next;
627 last->next = hd;
628 }
630 return (0);
631 } /* int csnmp_config_add_host */
633 static int csnmp_config (oconfig_item_t *ci)
634 {
635 int i;
637 call_snmp_init_once ();
639 for (i = 0; i < ci->children_num; i++)
640 {
641 oconfig_item_t *child = ci->children + i;
642 if (strcasecmp ("Data", child->key) == 0)
643 csnmp_config_add_data (child);
644 else if (strcasecmp ("Host", child->key) == 0)
645 csnmp_config_add_host (child);
646 else
647 {
648 WARNING ("snmp plugin: Ignoring unknown config option `%s'.", child->key);
649 }
650 } /* for (ci->children) */
652 return (0);
653 } /* int csnmp_config */
655 /* End of the config stuff. Now the interesting part begins */
657 static void csnmp_host_close_session (host_definition_t *host)
658 {
659 if (host->sess_handle == NULL)
660 return;
662 snmp_sess_close (host->sess_handle);
663 host->sess_handle = NULL;
664 } /* void csnmp_host_close_session */
666 static void csnmp_host_open_session (host_definition_t *host)
667 {
668 struct snmp_session sess;
670 if (host->sess_handle != NULL)
671 csnmp_host_close_session (host);
673 snmp_sess_init (&sess);
674 sess.peername = host->address;
675 sess.community = (u_char *) host->community;
676 sess.community_len = strlen (host->community);
677 sess.version = (host->version == 1) ? SNMP_VERSION_1 : SNMP_VERSION_2c;
679 /* snmp_sess_open will copy the `struct snmp_session *'. */
680 host->sess_handle = snmp_sess_open (&sess);
682 if (host->sess_handle == NULL)
683 {
684 char *errstr = NULL;
686 snmp_error (&sess, NULL, NULL, &errstr);
688 ERROR ("snmp plugin: host %s: snmp_sess_open failed: %s",
689 host->name, (errstr == NULL) ? "Unknown problem" : errstr);
690 sfree (errstr);
691 }
692 } /* void csnmp_host_open_session */
694 static value_t csnmp_value_list_to_value (struct variable_list *vl, int type,
695 double scale, double shift)
696 {
697 value_t ret;
698 uint64_t temp = 0;
699 int defined = 1;
701 if ((vl->type == ASN_INTEGER)
702 || (vl->type == ASN_UINTEGER)
703 || (vl->type == ASN_COUNTER)
704 #ifdef ASN_TIMETICKS
705 || (vl->type == ASN_TIMETICKS)
706 #endif
707 || (vl->type == ASN_GAUGE))
708 {
709 temp = (uint32_t) *vl->val.integer;
710 DEBUG ("snmp plugin: Parsed int32 value is %"PRIu64".", temp);
711 }
712 else if (vl->type == ASN_COUNTER64)
713 {
714 temp = (uint32_t) vl->val.counter64->high;
715 temp = temp << 32;
716 temp += (uint32_t) vl->val.counter64->low;
717 DEBUG ("snmp plugin: Parsed int64 value is %"PRIu64".", temp);
718 }
719 else
720 {
721 WARNING ("snmp plugin: I don't know the ASN type `%i'", (int) vl->type);
722 defined = 0;
723 }
725 if (type == DS_TYPE_COUNTER)
726 {
727 ret.counter = temp;
728 }
729 else if (type == DS_TYPE_GAUGE)
730 {
731 ret.gauge = NAN;
732 if (defined != 0)
733 ret.gauge = (scale * temp) + shift;
734 }
736 return (ret);
737 } /* value_t csnmp_value_list_to_value */
739 /* Returns true if all OIDs have left their subtree */
740 static int csnmp_check_res_left_subtree (const host_definition_t *host,
741 const data_definition_t *data,
742 struct snmp_pdu *res)
743 {
744 struct variable_list *vb;
745 int num_checked;
746 int num_left_subtree;
747 int i;
749 vb = res->variables;
750 if (vb == NULL)
751 return (-1);
753 num_checked = 0;
754 num_left_subtree = 0;
756 /* check all the variables and count how many have left their subtree */
757 for (vb = res->variables, i = 0;
758 (vb != NULL) && (i < data->values_len);
759 vb = vb->next_variable, i++)
760 {
761 num_checked++;
762 if (snmp_oid_ncompare (data->values[i].oid,
763 data->values[i].oid_len,
764 vb->name, vb->name_length,
765 data->values[i].oid_len) != 0)
766 num_left_subtree++;
767 }
769 /* check if enough variables have been returned */
770 if (i < data->values_len)
771 {
772 ERROR ("snmp plugin: host %s: Expected %i variables, but got only %i",
773 host->name, data->values_len, i);
774 return (-1);
775 }
777 if (data->instance.oid.oid_len > 0)
778 {
779 if (vb == NULL)
780 {
781 ERROR ("snmp plugin: host %s: Expected one more variable for "
782 "the instance..", host->name);
783 return (-1);
784 }
786 num_checked++;
787 if (snmp_oid_ncompare (data->instance.oid.oid,
788 data->instance.oid.oid_len,
789 vb->name, vb->name_length,
790 data->instance.oid.oid_len) != 0)
791 num_left_subtree++;
792 }
794 DEBUG ("snmp plugin: csnmp_check_res_left_subtree: %i of %i variables have "
795 "left their subtree",
796 num_left_subtree, num_checked);
797 if (num_left_subtree >= num_checked)
798 return (1);
799 return (0);
800 } /* int csnmp_check_res_left_subtree */
802 static int csnmp_instance_list_add (csnmp_list_instances_t **head,
803 csnmp_list_instances_t **tail,
804 const struct snmp_pdu *res)
805 {
806 csnmp_list_instances_t *il;
807 struct variable_list *vb;
809 /* Set vb on the last variable */
810 for (vb = res->variables;
811 (vb != NULL) && (vb->next_variable != NULL);
812 vb = vb->next_variable)
813 /* do nothing */;
814 if (vb == NULL)
815 return (-1);
817 il = (csnmp_list_instances_t *) malloc (sizeof (csnmp_list_instances_t));
818 if (il == NULL)
819 {
820 ERROR ("snmp plugin: malloc failed.");
821 return (-1);
822 }
823 il->subid = vb->name[vb->name_length - 1];
824 il->next = NULL;
826 /* Get instance name */
827 if ((vb->type == ASN_OCTET_STR) || (vb->type == ASN_BIT_STR))
828 {
829 char *ptr;
830 size_t instance_len;
832 instance_len = sizeof (il->instance) - 1;
833 if (instance_len > vb->val_len)
834 instance_len = vb->val_len;
836 strncpy (il->instance, (char *) ((vb->type == ASN_OCTET_STR)
837 ? vb->val.string
838 : vb->val.bitstring),
839 instance_len);
840 il->instance[instance_len] = '\0';
842 for (ptr = il->instance; *ptr != '\0'; ptr++)
843 {
844 if ((*ptr > 0) && (*ptr < 32))
845 *ptr = ' ';
846 else if (*ptr == '/')
847 *ptr = '_';
848 }
849 DEBUG ("snmp plugin: il->instance = `%s';", il->instance);
850 }
851 else
852 {
853 value_t val = csnmp_value_list_to_value (vb, DS_TYPE_COUNTER, 1.0, 0.0);
854 snprintf (il->instance, sizeof (il->instance),
855 "%llu", val.counter);
856 }
857 il->instance[sizeof (il->instance) - 1] = '\0';
859 /* TODO: Debugging output */
861 if (*head == NULL)
862 *head = il;
863 else
864 (*tail)->next = il;
865 *tail = il;
867 return (0);
868 } /* int csnmp_instance_list_add */
870 static int csnmp_dispatch_table (host_definition_t *host, data_definition_t *data,
871 csnmp_list_instances_t *instance_list,
872 csnmp_table_values_t **value_table)
873 {
874 const data_set_t *ds;
875 value_list_t vl = VALUE_LIST_INIT;
877 csnmp_list_instances_t *instance_list_ptr;
878 csnmp_table_values_t **value_table_ptr;
880 int i;
881 oid subid;
882 int have_more;
884 ds = plugin_get_ds (data->type);
885 if (!ds)
886 {
887 ERROR ("snmp plugin: DataSet `%s' not defined.", data->type);
888 return (-1);
889 }
890 assert (ds->ds_num == data->values_len);
892 instance_list_ptr = instance_list;
894 value_table_ptr = (csnmp_table_values_t **) malloc (sizeof (csnmp_table_values_t *)
895 * data->values_len);
896 if (value_table_ptr == NULL)
897 return (-1);
898 for (i = 0; i < data->values_len; i++)
899 value_table_ptr[i] = value_table[i];
901 vl.values_len = ds->ds_num;
902 vl.values = (value_t *) malloc (sizeof (value_t) * vl.values_len);
903 if (vl.values == NULL)
904 {
905 ERROR ("snmp plugin: malloc failed.");
906 sfree (value_table_ptr);
907 return (-1);
908 }
910 strncpy (vl.host, host->name, sizeof (vl.host));
911 vl.host[sizeof (vl.host) - 1] = '\0';
912 sstrncpy (vl.plugin, "snmp", sizeof (vl.plugin));
914 vl.interval = host->interval;
915 vl.time = time (NULL);
917 subid = 0;
918 have_more = 1;
920 while (have_more != 0)
921 {
922 if (instance_list != NULL)
923 {
924 while ((instance_list_ptr != NULL)
925 && (instance_list_ptr->subid < subid))
926 instance_list_ptr = instance_list_ptr->next;
928 if (instance_list_ptr == NULL)
929 {
930 have_more = 0;
931 continue;
932 }
933 else if (instance_list_ptr->subid > subid)
934 {
935 subid = instance_list_ptr->subid;
936 continue;
937 }
938 } /* if (instance_list != NULL) */
940 for (i = 0; i < data->values_len; i++)
941 {
942 while ((value_table_ptr[i] != NULL)
943 && (value_table_ptr[i]->subid < subid))
944 value_table_ptr[i] = value_table_ptr[i]->next;
946 if (value_table_ptr[i] == NULL)
947 {
948 have_more = 0;
949 break;
950 }
951 else if (value_table_ptr[i]->subid > subid)
952 {
953 subid = value_table_ptr[i]->subid;
954 break;
955 }
956 } /* for (i = 0; i < columns; i++) */
957 /* The subid has been increased - start scanning from the beginning
958 * again.. */
959 if (i < data->values_len)
960 continue;
962 /* if we reach this line, all value_table_ptr[i] are non-NULL and are set
963 * to the same subid. instance_list_ptr is either NULL or points to the
964 * same subid, too. */
965 #if COLLECT_DEBUG
966 for (i = 1; i < data->values_len; i++)
967 {
968 assert (value_table_ptr[i] != NULL);
969 assert (value_table_ptr[i-1]->subid == value_table_ptr[i]->subid);
970 }
971 assert ((instance_list_ptr == NULL)
972 || (instance_list_ptr->subid == value_table_ptr[0]->subid));
973 #endif
975 {
976 char temp[DATA_MAX_NAME_LEN];
978 if (instance_list_ptr == NULL)
979 snprintf (temp, sizeof (temp), "%u",
980 (uint32_t) subid);
981 else
982 strncpy (temp, instance_list_ptr->instance,
983 sizeof (temp));
984 temp[sizeof (temp) - 1] = '\0';
986 if (data->instance_prefix == NULL)
987 strncpy (vl.type_instance, temp, sizeof (vl.type_instance));
988 else
989 snprintf (vl.type_instance, sizeof (vl.type_instance), "%s%s",
990 data->instance_prefix, temp);
991 vl.type_instance[sizeof (vl.type_instance) - 1] = '\0';
992 }
994 for (i = 0; i < data->values_len; i++)
995 vl.values[i] = value_table_ptr[i]->value;
997 /* If we get here `vl.type_instance' and all `vl.values' have been set */
998 plugin_dispatch_values (data->type, &vl);
1000 subid++;
1001 } /* while (have_more != 0) */
1003 sfree (vl.values);
1004 sfree (value_table_ptr);
1006 return (0);
1007 } /* int csnmp_dispatch_table */
1009 static int csnmp_read_table (host_definition_t *host, data_definition_t *data)
1010 {
1011 struct snmp_pdu *req;
1012 struct snmp_pdu *res;
1013 struct variable_list *vb;
1015 const data_set_t *ds;
1016 oid_t *oid_list;
1017 uint32_t oid_list_len;
1019 int status;
1020 int i;
1022 /* `value_table' and `value_table_ptr' implement a linked list for each
1023 * value. `instance_list' and `instance_list_ptr' implement a linked list of
1024 * instance names. This is used to jump gaps in the table. */
1025 csnmp_list_instances_t *instance_list;
1026 csnmp_list_instances_t *instance_list_ptr;
1027 csnmp_table_values_t **value_table;
1028 csnmp_table_values_t **value_table_ptr;
1030 DEBUG ("snmp plugin: csnmp_read_table (host = %s, data = %s)",
1031 host->name, data->name);
1033 if (host->sess_handle == NULL)
1034 {
1035 DEBUG ("snmp plugin: csnmp_read_table: host->sess_handle == NULL");
1036 return (-1);
1037 }
1039 ds = plugin_get_ds (data->type);
1040 if (!ds)
1041 {
1042 ERROR ("snmp plugin: DataSet `%s' not defined.", data->type);
1043 return (-1);
1044 }
1046 if (ds->ds_num != data->values_len)
1047 {
1048 ERROR ("snmp plugin: DataSet `%s' requires %i values, but config talks about %i",
1049 data->type, ds->ds_num, data->values_len);
1050 return (-1);
1051 }
1053 /* We need a copy of all the OIDs, because GETNEXT will destroy them. */
1054 oid_list_len = data->values_len + 1;
1055 oid_list = (oid_t *) malloc (sizeof (oid_t) * (oid_list_len));
1056 if (oid_list == NULL)
1057 {
1058 ERROR ("snmp plugin: csnmp_read_table: malloc failed.");
1059 return (-1);
1060 }
1061 memcpy (oid_list, data->values, data->values_len * sizeof (oid_t));
1062 if (data->instance.oid.oid_len > 0)
1063 memcpy (oid_list + data->values_len, &data->instance.oid, sizeof (oid_t));
1064 else
1065 oid_list_len--;
1067 /* Allocate the `value_table' */
1068 value_table = (csnmp_table_values_t **) malloc (sizeof (csnmp_table_values_t *)
1069 * 2 * data->values_len);
1070 if (value_table == NULL)
1071 {
1072 ERROR ("snmp plugin: csnmp_read_table: malloc failed.");
1073 sfree (oid_list);
1074 return (-1);
1075 }
1076 memset (value_table, '\0', sizeof (csnmp_table_values_t *) * 2 * data->values_len);
1077 value_table_ptr = value_table + data->values_len;
1079 instance_list = NULL;
1080 instance_list_ptr = NULL;
1082 status = 0;
1083 while (status == 0)
1084 {
1085 req = snmp_pdu_create (SNMP_MSG_GETNEXT);
1086 if (req == NULL)
1087 {
1088 ERROR ("snmp plugin: snmp_pdu_create failed.");
1089 status = -1;
1090 break;
1091 }
1093 for (i = 0; i < oid_list_len; i++)
1094 snmp_add_null_var (req, oid_list[i].oid, oid_list[i].oid_len);
1096 res = NULL;
1097 status = snmp_sess_synch_response (host->sess_handle, req, &res);
1099 if ((status != STAT_SUCCESS) || (res == NULL))
1100 {
1101 char *errstr = NULL;
1103 snmp_sess_error (host->sess_handle, NULL, NULL, &errstr);
1104 ERROR ("snmp plugin: host %s: snmp_sess_synch_response failed: %s",
1105 host->name, (errstr == NULL) ? "Unknown problem" : errstr);
1107 if (res != NULL)
1108 snmp_free_pdu (res);
1109 res = NULL;
1111 sfree (errstr);
1112 csnmp_host_close_session (host);
1114 status = -1;
1115 break;
1116 }
1117 status = 0;
1118 assert (res != NULL);
1120 vb = res->variables;
1121 if (vb == NULL)
1122 {
1123 status = -1;
1124 break;
1125 }
1127 /* Check if all values (and possibly the instance) have left their
1128 * subtree */
1129 if (csnmp_check_res_left_subtree (host, data, res) != 0)
1130 {
1131 status = 0;
1132 break;
1133 }
1135 /* if an instance-OID is configured.. */
1136 if (data->instance.oid.oid_len > 0)
1137 {
1138 /* Allocate a new `csnmp_list_instances_t', insert the instance name and
1139 * add it to the list */
1140 if (csnmp_instance_list_add (&instance_list, &instance_list_ptr,
1141 res) != 0)
1142 {
1143 ERROR ("snmp plugin: csnmp_instance_list_add failed.");
1144 status = -1;
1145 break;
1146 }
1148 /* Set vb on the last variable */
1149 for (vb = res->variables;
1150 (vb != NULL) && (vb->next_variable != NULL);
1151 vb = vb->next_variable)
1152 /* do nothing */;
1153 assert (vb != NULL);
1155 /* Copy OID to oid_list[data->values_len] */
1156 memcpy (oid_list[data->values_len].oid, vb->name,
1157 sizeof (oid) * vb->name_length);
1158 oid_list[data->values_len].oid_len = vb->name_length;
1159 }
1161 for (vb = res->variables, i = 0;
1162 (vb != NULL) && (i < data->values_len);
1163 vb = vb->next_variable, i++)
1164 {
1165 csnmp_table_values_t *vt;
1167 /* Check if we left the subtree */
1168 if (snmp_oid_ncompare (data->values[i].oid,
1169 data->values[i].oid_len,
1170 vb->name, vb->name_length,
1171 data->values[i].oid_len) != 0)
1172 {
1173 DEBUG ("snmp plugin: host = %s; data = %s; Value %i left its subtree.",
1174 host->name, data->name, i);
1175 continue;
1176 }
1178 if ((value_table_ptr[i] != NULL)
1179 && (vb->name[vb->name_length - 1] <= value_table_ptr[i]->subid))
1180 {
1181 DEBUG ("snmp plugin: host = %s; data = %s; i = %i; "
1182 "SUBID is not increasing.",
1183 host->name, data->name, i);
1184 continue;
1185 }
1187 vt = (csnmp_table_values_t *) malloc (sizeof (csnmp_table_values_t));
1188 if (vt == NULL)
1189 {
1190 ERROR ("snmp plugin: malloc failed.");
1191 status = -1;
1192 break;
1193 }
1195 vt->subid = vb->name[vb->name_length - 1];
1196 vt->value = csnmp_value_list_to_value (vb, ds->ds[i].type,
1197 data->scale, data->shift);
1198 vt->next = NULL;
1200 if (value_table_ptr[i] == NULL)
1201 value_table[i] = vt;
1202 else
1203 value_table_ptr[i]->next = vt;
1204 value_table_ptr[i] = vt;
1206 /* Copy OID to oid_list[i + 1] */
1207 memcpy (oid_list[i].oid, vb->name, sizeof (oid) * vb->name_length);
1208 oid_list[i].oid_len = vb->name_length;
1209 } /* for (i = data->values_len) */
1211 if (res != NULL)
1212 snmp_free_pdu (res);
1213 res = NULL;
1214 } /* while (status == 0) */
1216 if (res != NULL)
1217 snmp_free_pdu (res);
1218 res = NULL;
1220 if (status == 0)
1221 csnmp_dispatch_table (host, data, instance_list, value_table);
1223 /* Free all allocated variables here */
1224 while (instance_list != NULL)
1225 {
1226 instance_list_ptr = instance_list->next;
1227 sfree (instance_list);
1228 instance_list = instance_list_ptr;
1229 }
1231 for (i = 0; i < data->values_len; i++)
1232 {
1233 csnmp_table_values_t *tmp;
1234 while (value_table[i] != NULL)
1235 {
1236 tmp = value_table[i]->next;
1237 sfree (value_table[i]);
1238 value_table[i] = tmp;
1239 }
1240 }
1242 sfree (value_table);
1243 sfree (oid_list);
1245 return (0);
1246 } /* int csnmp_read_table */
1248 static int csnmp_read_value (host_definition_t *host, data_definition_t *data)
1249 {
1250 struct snmp_pdu *req;
1251 struct snmp_pdu *res;
1252 struct variable_list *vb;
1254 const data_set_t *ds;
1255 value_list_t vl = VALUE_LIST_INIT;
1257 int status;
1258 int i;
1260 DEBUG ("snmp plugin: csnmp_read_value (host = %s, data = %s)",
1261 host->name, data->name);
1263 if (host->sess_handle == NULL)
1264 {
1265 DEBUG ("snmp plugin: csnmp_read_table: host->sess_handle == NULL");
1266 return (-1);
1267 }
1269 ds = plugin_get_ds (data->type);
1270 if (!ds)
1271 {
1272 ERROR ("snmp plugin: DataSet `%s' not defined.", data->type);
1273 return (-1);
1274 }
1276 if (ds->ds_num != data->values_len)
1277 {
1278 ERROR ("snmp plugin: DataSet `%s' requires %i values, but config talks about %i",
1279 data->type, ds->ds_num, data->values_len);
1280 return (-1);
1281 }
1283 vl.values_len = ds->ds_num;
1284 vl.values = (value_t *) malloc (sizeof (value_t) * vl.values_len);
1285 if (vl.values == NULL)
1286 return (-1);
1287 for (i = 0; i < vl.values_len; i++)
1288 {
1289 if (ds->ds[i].type == DS_TYPE_COUNTER)
1290 vl.values[i].counter = 0;
1291 else
1292 vl.values[i].gauge = NAN;
1293 }
1295 strncpy (vl.host, host->name, sizeof (vl.host));
1296 vl.host[sizeof (vl.host) - 1] = '\0';
1297 sstrncpy (vl.plugin, "snmp", sizeof (vl.plugin));
1298 strncpy (vl.type_instance, data->instance.string, sizeof (vl.type_instance));
1299 vl.type_instance[sizeof (vl.type_instance) - 1] = '\0';
1301 vl.interval = host->interval;
1303 req = snmp_pdu_create (SNMP_MSG_GET);
1304 if (req == NULL)
1305 {
1306 ERROR ("snmp plugin: snmp_pdu_create failed.");
1307 sfree (vl.values);
1308 return (-1);
1309 }
1311 for (i = 0; i < data->values_len; i++)
1312 snmp_add_null_var (req, data->values[i].oid, data->values[i].oid_len);
1314 res = NULL;
1315 status = snmp_sess_synch_response (host->sess_handle, req, &res);
1317 if ((status != STAT_SUCCESS) || (res == NULL))
1318 {
1319 char *errstr = NULL;
1321 snmp_sess_error (host->sess_handle, NULL, NULL, &errstr);
1322 ERROR ("snmp plugin: host %s: snmp_sess_synch_response failed: %s",
1323 host->name, (errstr == NULL) ? "Unknown problem" : errstr);
1325 if (res != NULL)
1326 snmp_free_pdu (res);
1327 res = NULL;
1329 sfree (errstr);
1330 csnmp_host_close_session (host);
1332 return (-1);
1333 }
1335 vl.time = time (NULL);
1337 for (vb = res->variables; vb != NULL; vb = vb->next_variable)
1338 {
1339 #if COLLECT_DEBUG
1340 char buffer[1024];
1341 snprint_variable (buffer, sizeof (buffer),
1342 vb->name, vb->name_length, vb);
1343 DEBUG ("snmp plugin: Got this variable: %s", buffer);
1344 #endif /* COLLECT_DEBUG */
1346 for (i = 0; i < data->values_len; i++)
1347 if (snmp_oid_compare (data->values[i].oid, data->values[i].oid_len,
1348 vb->name, vb->name_length) == 0)
1349 vl.values[i] = csnmp_value_list_to_value (vb, ds->ds[i].type,
1350 data->scale, data->shift);
1351 } /* for (res->variables) */
1353 if (res != NULL)
1354 snmp_free_pdu (res);
1355 res = NULL;
1357 DEBUG ("snmp plugin: -> plugin_dispatch_values (%s, &vl);", data->type);
1358 plugin_dispatch_values (data->type, &vl);
1359 sfree (vl.values);
1361 return (0);
1362 } /* int csnmp_read_value */
1364 static int csnmp_read_host (host_definition_t *host)
1365 {
1366 int i;
1367 time_t time_start;
1368 time_t time_end;
1370 time_start = time (NULL);
1371 DEBUG ("snmp plugin: csnmp_read_host (%s) started at %u;", host->name,
1372 (unsigned int) time_start);
1374 if (host->sess_handle == NULL)
1375 csnmp_host_open_session (host);
1377 if (host->sess_handle == NULL)
1378 return (-1);
1380 for (i = 0; i < host->data_list_len; i++)
1381 {
1382 data_definition_t *data = host->data_list[i];
1384 if (data->is_table)
1385 csnmp_read_table (host, data);
1386 else
1387 csnmp_read_value (host, data);
1388 }
1390 time_end = time (NULL);
1391 DEBUG ("snmp plugin: csnmp_read_host (%s) finished at %u;", host->name,
1392 (unsigned int) time_end);
1393 if ((time_end - time_start) > host->interval)
1394 {
1395 WARNING ("snmp plugin: Host `%s' should be queried every %i seconds, "
1396 "but reading all values takes %u seconds.",
1397 host->name, host->interval, (unsigned int) (time_end - time_start));
1398 }
1400 return (0);
1401 } /* int csnmp_read_host */
1403 static void *csnmp_read_thread (void *data)
1404 {
1405 host_definition_t *host;
1407 pthread_mutex_lock (&host_lock);
1408 while (do_shutdown == 0)
1409 {
1410 pthread_cond_wait (&host_cond, &host_lock);
1412 for (host = host_head; host != NULL; host = host->next)
1413 {
1414 if (do_shutdown != 0)
1415 break;
1416 if (host->state != STATE_WAIT)
1417 continue;
1419 host->state = STATE_BUSY;
1420 pthread_mutex_unlock (&host_lock);
1421 csnmp_read_host (host);
1422 pthread_mutex_lock (&host_lock);
1423 host->state = STATE_IDLE;
1424 } /* for (host) */
1425 } /* while (do_shutdown == 0) */
1426 pthread_mutex_unlock (&host_lock);
1428 pthread_exit ((void *) 0);
1429 return ((void *) 0);
1430 } /* void *csnmp_read_thread */
1432 static int csnmp_init (void)
1433 {
1434 host_definition_t *host;
1435 int i;
1437 if (host_head == NULL)
1438 {
1439 NOTICE ("snmp plugin: No host has been defined.");
1440 return (-1);
1441 }
1443 call_snmp_init_once ();
1445 threads_num = 0;
1446 for (host = host_head; host != NULL; host = host->next)
1447 {
1448 threads_num++;
1449 /* We need to initialize `interval' here, because `interval_g' isn't
1450 * initialized during `configure'. */
1451 host->next_update = time (NULL);
1452 if (host->interval == 0)
1453 {
1454 host->interval = interval_g;
1455 }
1456 else if (host->interval < interval_g)
1457 {
1458 host->interval = interval_g;
1459 WARNING ("snmp plugin: Data for host `%s' will be collected every %i seconds.",
1460 host->name, host->interval);
1461 }
1463 csnmp_host_open_session (host);
1464 } /* for (host) */
1466 /* Now start the reading threads */
1467 if (threads_num > 3)
1468 {
1469 threads_num = 3 + ((threads_num - 3) / 10);
1470 if (threads_num > 10)
1471 threads_num = 10;
1472 }
1474 threads = (pthread_t *) malloc (threads_num * sizeof (pthread_t));
1475 if (threads == NULL)
1476 {
1477 ERROR ("snmp plugin: malloc failed.");
1478 return (-1);
1479 }
1480 memset (threads, '\0', threads_num * sizeof (pthread_t));
1482 for (i = 0; i < threads_num; i++)
1483 pthread_create (threads + i, NULL, csnmp_read_thread, (void *) 0);
1485 return (0);
1486 } /* int csnmp_init */
1488 static int csnmp_read (void)
1489 {
1490 host_definition_t *host;
1491 time_t now;
1493 if (host_head == NULL)
1494 {
1495 INFO ("snmp plugin: No hosts configured.");
1496 return (-1);
1497 }
1499 now = time (NULL);
1501 pthread_mutex_lock (&host_lock);
1502 for (host = host_head; host != NULL; host = host->next)
1503 {
1504 if (host->state != STATE_IDLE)
1505 continue;
1507 /* Skip this host if the next or a later iteration will be sufficient. */
1508 if (host->next_update >= (now + interval_g))
1509 continue;
1511 host->state = STATE_WAIT;
1512 host->next_update = now + host->interval;
1513 } /* for (host) */
1515 pthread_cond_broadcast (&host_cond);
1516 pthread_mutex_unlock (&host_lock);
1518 return (0);
1519 } /* int csnmp_read */
1521 static int csnmp_shutdown (void)
1522 {
1523 host_definition_t *host_this;
1524 host_definition_t *host_next;
1526 data_definition_t *data_this;
1527 data_definition_t *data_next;
1529 int i;
1531 pthread_mutex_lock (&host_lock);
1532 do_shutdown = 1;
1533 pthread_cond_broadcast (&host_cond);
1534 pthread_mutex_unlock (&host_lock);
1536 for (i = 0; i < threads_num; i++)
1537 pthread_join (threads[i], NULL);
1539 /* Now that all the threads have exited, let's free all the global variables.
1540 * This isn't really neccessary, I guess, but I think it's good stile to do
1541 * so anyway. */
1542 host_this = host_head;
1543 host_head = NULL;
1544 while (host_this != NULL)
1545 {
1546 host_next = host_this->next;
1548 csnmp_host_close_session (host_this);
1550 sfree (host_this->name);
1551 sfree (host_this->address);
1552 sfree (host_this->community);
1553 sfree (host_this->data_list);
1554 sfree (host_this);
1556 host_this = host_next;
1557 }
1559 data_this = data_head;
1560 data_head = NULL;
1561 while (data_this != NULL)
1562 {
1563 data_next = data_this->next;
1565 sfree (data_this->name);
1566 sfree (data_this->type);
1567 sfree (data_this->values);
1568 sfree (data_this);
1570 data_this = data_next;
1571 }
1573 return (0);
1574 } /* int csnmp_shutdown */
1576 void module_register (void)
1577 {
1578 plugin_register_complex_config ("snmp", csnmp_config);
1579 plugin_register_init ("snmp", csnmp_init);
1580 plugin_register_read ("snmp", csnmp_read);
1581 plugin_register_shutdown ("snmp", csnmp_shutdown);
1582 } /* void module_register */
1584 /*
1585 * vim: shiftwidth=2 softtabstop=2 tabstop=8
1586 */