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 sstrncpy (dd->instance.string, ci->values[0].value.string,
202 sizeof (dd->instance.string));
203 }
205 return (0);
206 } /* int csnmp_config_add_data_instance */
208 static int csnmp_config_add_data_instance_prefix (data_definition_t *dd,
209 oconfig_item_t *ci)
210 {
211 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
212 {
213 WARNING ("snmp plugin: `InstancePrefix' needs exactly one string argument.");
214 return (-1);
215 }
217 if (!dd->is_table)
218 {
219 WARNING ("snmp plugin: data %s: InstancePrefix is ignored when `Table' "
220 "is set to `false'.", dd->name);
221 return (-1);
222 }
224 sfree (dd->instance_prefix);
225 dd->instance_prefix = strdup (ci->values[0].value.string);
226 if (dd->instance_prefix == NULL)
227 return (-1);
229 return (0);
230 } /* int csnmp_config_add_data_instance_prefix */
232 static int csnmp_config_add_data_values (data_definition_t *dd, oconfig_item_t *ci)
233 {
234 int i;
236 if (ci->values_num < 1)
237 {
238 WARNING ("snmp plugin: `Values' needs at least one argument.");
239 return (-1);
240 }
242 for (i = 0; i < ci->values_num; i++)
243 if (ci->values[i].type != OCONFIG_TYPE_STRING)
244 {
245 WARNING ("snmp plugin: `Values' needs only string argument.");
246 return (-1);
247 }
249 sfree (dd->values);
250 dd->values_len = 0;
251 dd->values = (oid_t *) malloc (sizeof (oid_t) * ci->values_num);
252 if (dd->values == NULL)
253 return (-1);
254 dd->values_len = ci->values_num;
256 for (i = 0; i < ci->values_num; i++)
257 {
258 dd->values[i].oid_len = MAX_OID_LEN;
260 if (NULL == snmp_parse_oid (ci->values[i].value.string,
261 dd->values[i].oid, &dd->values[i].oid_len))
262 {
263 ERROR ("snmp plugin: snmp_parse_oid (%s) failed.",
264 ci->values[i].value.string);
265 free (dd->values);
266 dd->values = NULL;
267 dd->values_len = 0;
268 return (-1);
269 }
270 }
272 return (0);
273 } /* int csnmp_config_add_data_instance */
275 static int csnmp_config_add_data_shift (data_definition_t *dd, oconfig_item_t *ci)
276 {
277 if ((ci->values_num != 1)
278 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
279 {
280 WARNING ("snmp plugin: The `Scale' config option needs exactly one number argument.");
281 return (-1);
282 }
284 dd->shift = ci->values[0].value.number;
286 return (0);
287 } /* int csnmp_config_add_data_shift */
289 static int csnmp_config_add_data_scale (data_definition_t *dd, oconfig_item_t *ci)
290 {
291 if ((ci->values_num != 1)
292 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
293 {
294 WARNING ("snmp plugin: The `Scale' config option needs exactly one number argument.");
295 return (-1);
296 }
298 dd->scale = ci->values[0].value.number;
300 return (0);
301 } /* int csnmp_config_add_data_scale */
303 static int csnmp_config_add_data (oconfig_item_t *ci)
304 {
305 data_definition_t *dd;
306 int status = 0;
307 int i;
309 if ((ci->values_num != 1)
310 || (ci->values[0].type != OCONFIG_TYPE_STRING))
311 {
312 WARNING ("snmp plugin: The `Data' config option needs exactly one string argument.");
313 return (-1);
314 }
316 dd = (data_definition_t *) malloc (sizeof (data_definition_t));
317 if (dd == NULL)
318 return (-1);
319 memset (dd, '\0', sizeof (data_definition_t));
321 dd->name = strdup (ci->values[0].value.string);
322 if (dd->name == NULL)
323 {
324 free (dd);
325 return (-1);
326 }
327 dd->scale = 1.0;
328 dd->shift = 0.0;
330 for (i = 0; i < ci->children_num; i++)
331 {
332 oconfig_item_t *option = ci->children + i;
333 status = 0;
335 if (strcasecmp ("Type", option->key) == 0)
336 status = csnmp_config_add_data_type (dd, option);
337 else if (strcasecmp ("Table", option->key) == 0)
338 status = csnmp_config_add_data_table (dd, option);
339 else if (strcasecmp ("Instance", option->key) == 0)
340 status = csnmp_config_add_data_instance (dd, option);
341 else if (strcasecmp ("InstancePrefix", option->key) == 0)
342 status = csnmp_config_add_data_instance_prefix (dd, option);
343 else if (strcasecmp ("Values", option->key) == 0)
344 status = csnmp_config_add_data_values (dd, option);
345 else if (strcasecmp ("Shift", option->key) == 0)
346 status = csnmp_config_add_data_shift (dd, option);
347 else if (strcasecmp ("Scale", option->key) == 0)
348 status = csnmp_config_add_data_scale (dd, option);
349 else
350 {
351 WARNING ("snmp plugin: Option `%s' not allowed here.", option->key);
352 status = -1;
353 }
355 if (status != 0)
356 break;
357 } /* for (ci->children) */
359 while (status == 0)
360 {
361 if (dd->type == NULL)
362 {
363 WARNING ("snmp plugin: `Type' not given for data `%s'", dd->name);
364 status = -1;
365 break;
366 }
367 if (dd->values == NULL)
368 {
369 WARNING ("snmp plugin: No `Value' given for data `%s'", dd->name);
370 status = -1;
371 break;
372 }
374 break;
375 } /* while (status == 0) */
377 if (status != 0)
378 {
379 sfree (dd->name);
380 sfree (dd->instance_prefix);
381 sfree (dd->values);
382 sfree (dd);
383 return (-1);
384 }
386 DEBUG ("snmp plugin: dd = { name = %s, type = %s, is_table = %s, values_len = %i }",
387 dd->name, dd->type, (dd->is_table != 0) ? "true" : "false", dd->values_len);
389 if (data_head == NULL)
390 data_head = dd;
391 else
392 {
393 data_definition_t *last;
394 last = data_head;
395 while (last->next != NULL)
396 last = last->next;
397 last->next = dd;
398 }
400 return (0);
401 } /* int csnmp_config_add_data */
403 static int csnmp_config_add_host_address (host_definition_t *hd, oconfig_item_t *ci)
404 {
405 if ((ci->values_num != 1)
406 || (ci->values[0].type != OCONFIG_TYPE_STRING))
407 {
408 WARNING ("snmp plugin: The `Address' config option needs exactly one string argument.");
409 return (-1);
410 }
412 if (hd->address == NULL)
413 free (hd->address);
415 hd->address = strdup (ci->values[0].value.string);
416 if (hd->address == NULL)
417 return (-1);
419 DEBUG ("snmp plugin: host = %s; host->address = %s;",
420 hd->name, hd->address);
422 return (0);
423 } /* int csnmp_config_add_host_address */
425 static int csnmp_config_add_host_community (host_definition_t *hd, oconfig_item_t *ci)
426 {
427 if ((ci->values_num != 1)
428 || (ci->values[0].type != OCONFIG_TYPE_STRING))
429 {
430 WARNING ("snmp plugin: The `Community' config option needs exactly one string argument.");
431 return (-1);
432 }
434 if (hd->community == NULL)
435 free (hd->community);
437 hd->community = strdup (ci->values[0].value.string);
438 if (hd->community == NULL)
439 return (-1);
441 DEBUG ("snmp plugin: host = %s; host->community = %s;",
442 hd->name, hd->community);
444 return (0);
445 } /* int csnmp_config_add_host_community */
447 static int csnmp_config_add_host_version (host_definition_t *hd, oconfig_item_t *ci)
448 {
449 int version;
451 if ((ci->values_num != 1)
452 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
453 {
454 WARNING ("snmp plugin: The `Version' config option needs exactly one number argument.");
455 return (-1);
456 }
458 version = (int) ci->values[0].value.number;
459 if ((version != 1) && (version != 2))
460 {
461 WARNING ("snmp plugin: `Version' must either be `1' or `2'.");
462 return (-1);
463 }
465 hd->version = version;
467 return (0);
468 } /* int csnmp_config_add_host_address */
470 static int csnmp_config_add_host_collect (host_definition_t *host,
471 oconfig_item_t *ci)
472 {
473 data_definition_t *data;
474 data_definition_t **data_list;
475 int data_list_len;
476 int i;
478 if (ci->values_num < 1)
479 {
480 WARNING ("snmp plugin: `Collect' needs at least one argument.");
481 return (-1);
482 }
484 for (i = 0; i < ci->values_num; i++)
485 if (ci->values[i].type != OCONFIG_TYPE_STRING)
486 {
487 WARNING ("snmp plugin: All arguments to `Collect' must be strings.");
488 return (-1);
489 }
491 data_list_len = host->data_list_len + ci->values_num;
492 data_list = (data_definition_t **) realloc (host->data_list,
493 sizeof (data_definition_t *) * data_list_len);
494 if (data_list == NULL)
495 return (-1);
496 host->data_list = data_list;
498 for (i = 0; i < ci->values_num; i++)
499 {
500 for (data = data_head; data != NULL; data = data->next)
501 if (strcasecmp (ci->values[i].value.string, data->name) == 0)
502 break;
504 if (data == NULL)
505 {
506 WARNING ("snmp plugin: No such data configured: `%s'",
507 ci->values[i].value.string);
508 continue;
509 }
511 DEBUG ("snmp plugin: Collect: host = %s, data[%i] = %s;",
512 host->name, host->data_list_len, data->name);
514 host->data_list[host->data_list_len] = data;
515 host->data_list_len++;
516 } /* for (values_num) */
518 return (0);
519 } /* int csnmp_config_add_host_collect */
521 static int csnmp_config_add_host_interval (host_definition_t *hd, oconfig_item_t *ci)
522 {
523 if ((ci->values_num != 1)
524 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
525 {
526 WARNING ("snmp plugin: The `Interval' config option needs exactly one number argument.");
527 return (-1);
528 }
530 hd->interval = (int) ci->values[0].value.number;
531 if (hd->interval < 0)
532 hd->interval = 0;
534 return (0);
535 } /* int csnmp_config_add_host_interval */
537 static int csnmp_config_add_host (oconfig_item_t *ci)
538 {
539 host_definition_t *hd;
540 int status = 0;
541 int i;
543 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
544 {
545 WARNING ("snmp plugin: `Host' needs exactly one string argument.");
546 return (-1);
547 }
549 hd = (host_definition_t *) malloc (sizeof (host_definition_t));
550 if (hd == NULL)
551 return (-1);
552 memset (hd, '\0', sizeof (host_definition_t));
553 hd->version = 2;
555 hd->name = strdup (ci->values[0].value.string);
556 if (hd->name == NULL)
557 {
558 free (hd);
559 return (-1);
560 }
562 hd->sess_handle = NULL;
563 hd->interval = 0;
564 hd->next_update = 0;
565 hd->state = STATE_IDLE;
567 for (i = 0; i < ci->children_num; i++)
568 {
569 oconfig_item_t *option = ci->children + i;
570 status = 0;
572 if (strcasecmp ("Address", option->key) == 0)
573 status = csnmp_config_add_host_address (hd, option);
574 else if (strcasecmp ("Community", option->key) == 0)
575 status = csnmp_config_add_host_community (hd, option);
576 else if (strcasecmp ("Version", option->key) == 0)
577 status = csnmp_config_add_host_version (hd, option);
578 else if (strcasecmp ("Collect", option->key) == 0)
579 csnmp_config_add_host_collect (hd, option);
580 else if (strcasecmp ("Interval", option->key) == 0)
581 csnmp_config_add_host_interval (hd, option);
582 else
583 {
584 WARNING ("snmp plugin: csnmp_config_add_host: Option `%s' not allowed here.", option->key);
585 status = -1;
586 }
588 if (status != 0)
589 break;
590 } /* for (ci->children) */
592 while (status == 0)
593 {
594 if (hd->address == NULL)
595 {
596 WARNING ("snmp plugin: `Address' not given for host `%s'", hd->name);
597 status = -1;
598 break;
599 }
600 if (hd->community == NULL)
601 {
602 WARNING ("snmp plugin: `Community' not given for host `%s'", hd->name);
603 status = -1;
604 break;
605 }
607 break;
608 } /* while (status == 0) */
610 if (status != 0)
611 {
612 sfree (hd->name);
613 sfree (hd);
614 return (-1);
615 }
617 DEBUG ("snmp plugin: hd = { name = %s, address = %s, community = %s, version = %i }",
618 hd->name, hd->address, hd->community, hd->version);
620 if (host_head == NULL)
621 host_head = hd;
622 else
623 {
624 host_definition_t *last;
625 last = host_head;
626 while (last->next != NULL)
627 last = last->next;
628 last->next = hd;
629 }
631 return (0);
632 } /* int csnmp_config_add_host */
634 static int csnmp_config (oconfig_item_t *ci)
635 {
636 int i;
638 call_snmp_init_once ();
640 for (i = 0; i < ci->children_num; i++)
641 {
642 oconfig_item_t *child = ci->children + i;
643 if (strcasecmp ("Data", child->key) == 0)
644 csnmp_config_add_data (child);
645 else if (strcasecmp ("Host", child->key) == 0)
646 csnmp_config_add_host (child);
647 else
648 {
649 WARNING ("snmp plugin: Ignoring unknown config option `%s'.", child->key);
650 }
651 } /* for (ci->children) */
653 return (0);
654 } /* int csnmp_config */
656 /* End of the config stuff. Now the interesting part begins */
658 static void csnmp_host_close_session (host_definition_t *host)
659 {
660 if (host->sess_handle == NULL)
661 return;
663 snmp_sess_close (host->sess_handle);
664 host->sess_handle = NULL;
665 } /* void csnmp_host_close_session */
667 static void csnmp_host_open_session (host_definition_t *host)
668 {
669 struct snmp_session sess;
671 if (host->sess_handle != NULL)
672 csnmp_host_close_session (host);
674 snmp_sess_init (&sess);
675 sess.peername = host->address;
676 sess.community = (u_char *) host->community;
677 sess.community_len = strlen (host->community);
678 sess.version = (host->version == 1) ? SNMP_VERSION_1 : SNMP_VERSION_2c;
680 /* snmp_sess_open will copy the `struct snmp_session *'. */
681 host->sess_handle = snmp_sess_open (&sess);
683 if (host->sess_handle == NULL)
684 {
685 char *errstr = NULL;
687 snmp_error (&sess, NULL, NULL, &errstr);
689 ERROR ("snmp plugin: host %s: snmp_sess_open failed: %s",
690 host->name, (errstr == NULL) ? "Unknown problem" : errstr);
691 sfree (errstr);
692 }
693 } /* void csnmp_host_open_session */
695 /* TODO: Check if negative values wrap around. Problem: negative temperatures. */
696 static value_t csnmp_value_list_to_value (struct variable_list *vl, int type,
697 double scale, double shift)
698 {
699 value_t ret;
700 uint64_t temp = 0;
701 int defined = 1;
703 if ((vl->type == ASN_INTEGER)
704 || (vl->type == ASN_UINTEGER)
705 || (vl->type == ASN_COUNTER)
706 #ifdef ASN_TIMETICKS
707 || (vl->type == ASN_TIMETICKS)
708 #endif
709 || (vl->type == ASN_GAUGE))
710 {
711 temp = (uint32_t) *vl->val.integer;
712 DEBUG ("snmp plugin: Parsed int32 value is %"PRIu64".", temp);
713 }
714 else if (vl->type == ASN_COUNTER64)
715 {
716 temp = (uint32_t) vl->val.counter64->high;
717 temp = temp << 32;
718 temp += (uint32_t) vl->val.counter64->low;
719 DEBUG ("snmp plugin: Parsed int64 value is %"PRIu64".", temp);
720 }
721 else if (vl->type == ASN_OCTET_STR)
722 {
723 /* We'll handle this later.. */
724 }
725 else
726 {
727 WARNING ("snmp plugin: I don't know the ASN type `%i'", (int) vl->type);
728 defined = 0;
729 }
731 if (vl->type == ASN_OCTET_STR)
732 {
733 char *endptr;
735 endptr = NULL;
736 if (vl->val.string != NULL)
737 {
738 char string[64];
739 size_t string_length;
741 string_length = sizeof (string) - 1;
742 if (vl->val_len < string_length)
743 string_length = vl->val_len;
745 /* The strings we get from the Net-SNMP library may not be null
746 * terminated. That is why we're using `membpy' here and not `strcpy'.
747 * `string_length' is set to `vl->val_len' which holds the length of the
748 * string. -octo */
749 memcpy (string, vl->val.string, string_length);
750 string[string_length] = 0;
752 if (type == DS_TYPE_COUNTER)
753 {
754 ret.counter = (counter_t) strtoll (string, &endptr, /* base = */ 0);
755 DEBUG ("snmp plugin: csnmp_value_list_to_value: String to counter: %s -> %llu",
756 string, (unsigned long long) ret.counter);
757 }
758 else if (type == DS_TYPE_GAUGE)
759 {
760 ret.gauge = (gauge_t) strtod (string, &endptr);
761 DEBUG ("snmp plugin: csnmp_value_list_to_value: String to gauge: %s -> %g",
762 string, (double) ret.gauge);
763 }
764 }
766 /* Check if an error occurred */
767 if ((vl->val.string == NULL) || (endptr == (char *) vl->val.string))
768 {
769 if (type == DS_TYPE_COUNTER)
770 ret.counter = 0;
771 else if (type == DS_TYPE_GAUGE)
772 ret.gauge = NAN;
773 }
774 }
775 else if (type == DS_TYPE_COUNTER)
776 {
777 ret.counter = temp;
778 }
779 else if (type == DS_TYPE_GAUGE)
780 {
781 ret.gauge = NAN;
782 if (defined != 0)
783 ret.gauge = (scale * temp) + shift;
784 }
786 return (ret);
787 } /* value_t csnmp_value_list_to_value */
789 /* Returns true if all OIDs have left their subtree */
790 static int csnmp_check_res_left_subtree (const host_definition_t *host,
791 const data_definition_t *data,
792 struct snmp_pdu *res)
793 {
794 struct variable_list *vb;
795 int num_checked;
796 int num_left_subtree;
797 int i;
799 vb = res->variables;
800 if (vb == NULL)
801 return (-1);
803 num_checked = 0;
804 num_left_subtree = 0;
806 /* check all the variables and count how many have left their subtree */
807 for (vb = res->variables, i = 0;
808 (vb != NULL) && (i < data->values_len);
809 vb = vb->next_variable, i++)
810 {
811 num_checked++;
812 if (snmp_oid_ncompare (data->values[i].oid,
813 data->values[i].oid_len,
814 vb->name, vb->name_length,
815 data->values[i].oid_len) != 0)
816 num_left_subtree++;
817 }
819 /* check if enough variables have been returned */
820 if (i < data->values_len)
821 {
822 ERROR ("snmp plugin: host %s: Expected %i variables, but got only %i",
823 host->name, data->values_len, i);
824 return (-1);
825 }
827 if (data->instance.oid.oid_len > 0)
828 {
829 if (vb == NULL)
830 {
831 ERROR ("snmp plugin: host %s: Expected one more variable for "
832 "the instance..", host->name);
833 return (-1);
834 }
836 num_checked++;
837 if (snmp_oid_ncompare (data->instance.oid.oid,
838 data->instance.oid.oid_len,
839 vb->name, vb->name_length,
840 data->instance.oid.oid_len) != 0)
841 num_left_subtree++;
842 }
844 DEBUG ("snmp plugin: csnmp_check_res_left_subtree: %i of %i variables have "
845 "left their subtree",
846 num_left_subtree, num_checked);
847 if (num_left_subtree >= num_checked)
848 return (1);
849 return (0);
850 } /* int csnmp_check_res_left_subtree */
852 static int csnmp_instance_list_add (csnmp_list_instances_t **head,
853 csnmp_list_instances_t **tail,
854 const struct snmp_pdu *res)
855 {
856 csnmp_list_instances_t *il;
857 struct variable_list *vb;
859 /* Set vb on the last variable */
860 for (vb = res->variables;
861 (vb != NULL) && (vb->next_variable != NULL);
862 vb = vb->next_variable)
863 /* do nothing */;
864 if (vb == NULL)
865 return (-1);
867 il = (csnmp_list_instances_t *) malloc (sizeof (csnmp_list_instances_t));
868 if (il == NULL)
869 {
870 ERROR ("snmp plugin: malloc failed.");
871 return (-1);
872 }
873 il->subid = vb->name[vb->name_length - 1];
874 il->next = NULL;
876 /* Get instance name */
877 if ((vb->type == ASN_OCTET_STR) || (vb->type == ASN_BIT_STR))
878 {
879 char *ptr;
880 size_t instance_len;
882 memset (il->instance, 0, sizeof (il->instance));
883 instance_len = sizeof (il->instance) - 1;
884 if (instance_len > vb->val_len)
885 instance_len = vb->val_len;
887 sstrncpy (il->instance, (char *) ((vb->type == ASN_OCTET_STR)
888 ? vb->val.string
889 : vb->val.bitstring),
890 instance_len + 1);
892 for (ptr = il->instance; *ptr != '\0'; ptr++)
893 {
894 if ((*ptr > 0) && (*ptr < 32))
895 *ptr = ' ';
896 else if (*ptr == '/')
897 *ptr = '_';
898 }
899 DEBUG ("snmp plugin: il->instance = `%s';", il->instance);
900 }
901 else
902 {
903 value_t val = csnmp_value_list_to_value (vb, DS_TYPE_COUNTER, 1.0, 0.0);
904 ssnprintf (il->instance, sizeof (il->instance),
905 "%llu", val.counter);
906 }
908 /* TODO: Debugging output */
910 if (*head == NULL)
911 *head = il;
912 else
913 (*tail)->next = il;
914 *tail = il;
916 return (0);
917 } /* int csnmp_instance_list_add */
919 static int csnmp_dispatch_table (host_definition_t *host, data_definition_t *data,
920 csnmp_list_instances_t *instance_list,
921 csnmp_table_values_t **value_table)
922 {
923 const data_set_t *ds;
924 value_list_t vl = VALUE_LIST_INIT;
926 csnmp_list_instances_t *instance_list_ptr;
927 csnmp_table_values_t **value_table_ptr;
929 int i;
930 oid subid;
931 int have_more;
933 ds = plugin_get_ds (data->type);
934 if (!ds)
935 {
936 ERROR ("snmp plugin: DataSet `%s' not defined.", data->type);
937 return (-1);
938 }
939 assert (ds->ds_num == data->values_len);
941 instance_list_ptr = instance_list;
943 value_table_ptr = (csnmp_table_values_t **) malloc (sizeof (csnmp_table_values_t *)
944 * data->values_len);
945 if (value_table_ptr == NULL)
946 return (-1);
947 for (i = 0; i < data->values_len; i++)
948 value_table_ptr[i] = value_table[i];
950 vl.values_len = ds->ds_num;
951 vl.values = (value_t *) malloc (sizeof (value_t) * vl.values_len);
952 if (vl.values == NULL)
953 {
954 ERROR ("snmp plugin: malloc failed.");
955 sfree (value_table_ptr);
956 return (-1);
957 }
959 sstrncpy (vl.host, host->name, sizeof (vl.host));
960 sstrncpy (vl.plugin, "snmp", sizeof (vl.plugin));
962 vl.interval = host->interval;
963 vl.time = time (NULL);
965 subid = 0;
966 have_more = 1;
968 while (have_more != 0)
969 {
970 if (instance_list != NULL)
971 {
972 while ((instance_list_ptr != NULL)
973 && (instance_list_ptr->subid < subid))
974 instance_list_ptr = instance_list_ptr->next;
976 if (instance_list_ptr == NULL)
977 {
978 have_more = 0;
979 continue;
980 }
981 else if (instance_list_ptr->subid > subid)
982 {
983 subid = instance_list_ptr->subid;
984 continue;
985 }
986 } /* if (instance_list != NULL) */
988 for (i = 0; i < data->values_len; i++)
989 {
990 while ((value_table_ptr[i] != NULL)
991 && (value_table_ptr[i]->subid < subid))
992 value_table_ptr[i] = value_table_ptr[i]->next;
994 if (value_table_ptr[i] == NULL)
995 {
996 have_more = 0;
997 break;
998 }
999 else if (value_table_ptr[i]->subid > subid)
1000 {
1001 subid = value_table_ptr[i]->subid;
1002 break;
1003 }
1004 } /* for (i = 0; i < columns; i++) */
1005 /* The subid has been increased - start scanning from the beginning
1006 * again.. */
1007 if (i < data->values_len)
1008 continue;
1010 /* if we reach this line, all value_table_ptr[i] are non-NULL and are set
1011 * to the same subid. instance_list_ptr is either NULL or points to the
1012 * same subid, too. */
1013 #if COLLECT_DEBUG
1014 for (i = 1; i < data->values_len; i++)
1015 {
1016 assert (value_table_ptr[i] != NULL);
1017 assert (value_table_ptr[i-1]->subid == value_table_ptr[i]->subid);
1018 }
1019 assert ((instance_list_ptr == NULL)
1020 || (instance_list_ptr->subid == value_table_ptr[0]->subid));
1021 #endif
1023 sstrncpy (vl.type, data->type, sizeof (vl.type));
1025 {
1026 char temp[DATA_MAX_NAME_LEN];
1028 if (instance_list_ptr == NULL)
1029 ssnprintf (temp, sizeof (temp), "%u", (uint32_t) subid);
1030 else
1031 sstrncpy (temp, instance_list_ptr->instance, sizeof (temp));
1033 if (data->instance_prefix == NULL)
1034 sstrncpy (vl.type_instance, temp, sizeof (vl.type_instance));
1035 else
1036 ssnprintf (vl.type_instance, sizeof (vl.type_instance), "%s%s",
1037 data->instance_prefix, temp);
1038 }
1040 for (i = 0; i < data->values_len; i++)
1041 vl.values[i] = value_table_ptr[i]->value;
1043 /* If we get here `vl.type_instance' and all `vl.values' have been set */
1044 plugin_dispatch_values (&vl);
1046 subid++;
1047 } /* while (have_more != 0) */
1049 sfree (vl.values);
1050 sfree (value_table_ptr);
1052 return (0);
1053 } /* int csnmp_dispatch_table */
1055 static int csnmp_read_table (host_definition_t *host, data_definition_t *data)
1056 {
1057 struct snmp_pdu *req;
1058 struct snmp_pdu *res;
1059 struct variable_list *vb;
1061 const data_set_t *ds;
1062 oid_t *oid_list;
1063 uint32_t oid_list_len;
1065 int status;
1066 int i;
1068 /* `value_table' and `value_table_ptr' implement a linked list for each
1069 * value. `instance_list' and `instance_list_ptr' implement a linked list of
1070 * instance names. This is used to jump gaps in the table. */
1071 csnmp_list_instances_t *instance_list;
1072 csnmp_list_instances_t *instance_list_ptr;
1073 csnmp_table_values_t **value_table;
1074 csnmp_table_values_t **value_table_ptr;
1076 DEBUG ("snmp plugin: csnmp_read_table (host = %s, data = %s)",
1077 host->name, data->name);
1079 if (host->sess_handle == NULL)
1080 {
1081 DEBUG ("snmp plugin: csnmp_read_table: host->sess_handle == NULL");
1082 return (-1);
1083 }
1085 ds = plugin_get_ds (data->type);
1086 if (!ds)
1087 {
1088 ERROR ("snmp plugin: DataSet `%s' not defined.", data->type);
1089 return (-1);
1090 }
1092 if (ds->ds_num != data->values_len)
1093 {
1094 ERROR ("snmp plugin: DataSet `%s' requires %i values, but config talks about %i",
1095 data->type, ds->ds_num, data->values_len);
1096 return (-1);
1097 }
1099 /* We need a copy of all the OIDs, because GETNEXT will destroy them. */
1100 oid_list_len = data->values_len + 1;
1101 oid_list = (oid_t *) malloc (sizeof (oid_t) * (oid_list_len));
1102 if (oid_list == NULL)
1103 {
1104 ERROR ("snmp plugin: csnmp_read_table: malloc failed.");
1105 return (-1);
1106 }
1107 memcpy (oid_list, data->values, data->values_len * sizeof (oid_t));
1108 if (data->instance.oid.oid_len > 0)
1109 memcpy (oid_list + data->values_len, &data->instance.oid, sizeof (oid_t));
1110 else
1111 oid_list_len--;
1113 /* Allocate the `value_table' */
1114 value_table = (csnmp_table_values_t **) malloc (sizeof (csnmp_table_values_t *)
1115 * 2 * data->values_len);
1116 if (value_table == NULL)
1117 {
1118 ERROR ("snmp plugin: csnmp_read_table: malloc failed.");
1119 sfree (oid_list);
1120 return (-1);
1121 }
1122 memset (value_table, '\0', sizeof (csnmp_table_values_t *) * 2 * data->values_len);
1123 value_table_ptr = value_table + data->values_len;
1125 instance_list = NULL;
1126 instance_list_ptr = NULL;
1128 status = 0;
1129 while (status == 0)
1130 {
1131 req = snmp_pdu_create (SNMP_MSG_GETNEXT);
1132 if (req == NULL)
1133 {
1134 ERROR ("snmp plugin: snmp_pdu_create failed.");
1135 status = -1;
1136 break;
1137 }
1139 for (i = 0; i < oid_list_len; i++)
1140 snmp_add_null_var (req, oid_list[i].oid, oid_list[i].oid_len);
1142 res = NULL;
1143 status = snmp_sess_synch_response (host->sess_handle, req, &res);
1145 if ((status != STAT_SUCCESS) || (res == NULL))
1146 {
1147 char *errstr = NULL;
1149 snmp_sess_error (host->sess_handle, NULL, NULL, &errstr);
1150 ERROR ("snmp plugin: host %s: snmp_sess_synch_response failed: %s",
1151 host->name, (errstr == NULL) ? "Unknown problem" : errstr);
1153 if (res != NULL)
1154 snmp_free_pdu (res);
1155 res = NULL;
1157 sfree (errstr);
1158 csnmp_host_close_session (host);
1160 status = -1;
1161 break;
1162 }
1163 status = 0;
1164 assert (res != NULL);
1166 vb = res->variables;
1167 if (vb == NULL)
1168 {
1169 status = -1;
1170 break;
1171 }
1173 /* Check if all values (and possibly the instance) have left their
1174 * subtree */
1175 if (csnmp_check_res_left_subtree (host, data, res) != 0)
1176 {
1177 status = 0;
1178 break;
1179 }
1181 /* if an instance-OID is configured.. */
1182 if (data->instance.oid.oid_len > 0)
1183 {
1184 /* Allocate a new `csnmp_list_instances_t', insert the instance name and
1185 * add it to the list */
1186 if (csnmp_instance_list_add (&instance_list, &instance_list_ptr,
1187 res) != 0)
1188 {
1189 ERROR ("snmp plugin: csnmp_instance_list_add failed.");
1190 status = -1;
1191 break;
1192 }
1194 /* Set vb on the last variable */
1195 for (vb = res->variables;
1196 (vb != NULL) && (vb->next_variable != NULL);
1197 vb = vb->next_variable)
1198 /* do nothing */;
1199 assert (vb != NULL);
1201 /* Copy OID to oid_list[data->values_len] */
1202 memcpy (oid_list[data->values_len].oid, vb->name,
1203 sizeof (oid) * vb->name_length);
1204 oid_list[data->values_len].oid_len = vb->name_length;
1205 }
1207 for (vb = res->variables, i = 0;
1208 (vb != NULL) && (i < data->values_len);
1209 vb = vb->next_variable, i++)
1210 {
1211 csnmp_table_values_t *vt;
1213 /* Check if we left the subtree */
1214 if (snmp_oid_ncompare (data->values[i].oid,
1215 data->values[i].oid_len,
1216 vb->name, vb->name_length,
1217 data->values[i].oid_len) != 0)
1218 {
1219 DEBUG ("snmp plugin: host = %s; data = %s; Value %i left its subtree.",
1220 host->name, data->name, i);
1221 continue;
1222 }
1224 if ((value_table_ptr[i] != NULL)
1225 && (vb->name[vb->name_length - 1] <= value_table_ptr[i]->subid))
1226 {
1227 DEBUG ("snmp plugin: host = %s; data = %s; i = %i; "
1228 "SUBID is not increasing.",
1229 host->name, data->name, i);
1230 continue;
1231 }
1233 vt = (csnmp_table_values_t *) malloc (sizeof (csnmp_table_values_t));
1234 if (vt == NULL)
1235 {
1236 ERROR ("snmp plugin: malloc failed.");
1237 status = -1;
1238 break;
1239 }
1241 vt->subid = vb->name[vb->name_length - 1];
1242 vt->value = csnmp_value_list_to_value (vb, ds->ds[i].type,
1243 data->scale, data->shift);
1244 vt->next = NULL;
1246 if (value_table_ptr[i] == NULL)
1247 value_table[i] = vt;
1248 else
1249 value_table_ptr[i]->next = vt;
1250 value_table_ptr[i] = vt;
1252 /* Copy OID to oid_list[i + 1] */
1253 memcpy (oid_list[i].oid, vb->name, sizeof (oid) * vb->name_length);
1254 oid_list[i].oid_len = vb->name_length;
1255 } /* for (i = data->values_len) */
1257 if (res != NULL)
1258 snmp_free_pdu (res);
1259 res = NULL;
1260 } /* while (status == 0) */
1262 if (res != NULL)
1263 snmp_free_pdu (res);
1264 res = NULL;
1266 if (status == 0)
1267 csnmp_dispatch_table (host, data, instance_list, value_table);
1269 /* Free all allocated variables here */
1270 while (instance_list != NULL)
1271 {
1272 instance_list_ptr = instance_list->next;
1273 sfree (instance_list);
1274 instance_list = instance_list_ptr;
1275 }
1277 for (i = 0; i < data->values_len; i++)
1278 {
1279 csnmp_table_values_t *tmp;
1280 while (value_table[i] != NULL)
1281 {
1282 tmp = value_table[i]->next;
1283 sfree (value_table[i]);
1284 value_table[i] = tmp;
1285 }
1286 }
1288 sfree (value_table);
1289 sfree (oid_list);
1291 return (0);
1292 } /* int csnmp_read_table */
1294 static int csnmp_read_value (host_definition_t *host, data_definition_t *data)
1295 {
1296 struct snmp_pdu *req;
1297 struct snmp_pdu *res;
1298 struct variable_list *vb;
1300 const data_set_t *ds;
1301 value_list_t vl = VALUE_LIST_INIT;
1303 int status;
1304 int i;
1306 DEBUG ("snmp plugin: csnmp_read_value (host = %s, data = %s)",
1307 host->name, data->name);
1309 if (host->sess_handle == NULL)
1310 {
1311 DEBUG ("snmp plugin: csnmp_read_table: host->sess_handle == NULL");
1312 return (-1);
1313 }
1315 ds = plugin_get_ds (data->type);
1316 if (!ds)
1317 {
1318 ERROR ("snmp plugin: DataSet `%s' not defined.", data->type);
1319 return (-1);
1320 }
1322 if (ds->ds_num != data->values_len)
1323 {
1324 ERROR ("snmp plugin: DataSet `%s' requires %i values, but config talks about %i",
1325 data->type, ds->ds_num, data->values_len);
1326 return (-1);
1327 }
1329 vl.values_len = ds->ds_num;
1330 vl.values = (value_t *) malloc (sizeof (value_t) * vl.values_len);
1331 if (vl.values == NULL)
1332 return (-1);
1333 for (i = 0; i < vl.values_len; i++)
1334 {
1335 if (ds->ds[i].type == DS_TYPE_COUNTER)
1336 vl.values[i].counter = 0;
1337 else
1338 vl.values[i].gauge = NAN;
1339 }
1341 sstrncpy (vl.host, host->name, sizeof (vl.host));
1342 sstrncpy (vl.plugin, "snmp", sizeof (vl.plugin));
1343 sstrncpy (vl.type, data->type, sizeof (vl.type));
1344 sstrncpy (vl.type_instance, data->instance.string, sizeof (vl.type_instance));
1346 vl.interval = host->interval;
1348 req = snmp_pdu_create (SNMP_MSG_GET);
1349 if (req == NULL)
1350 {
1351 ERROR ("snmp plugin: snmp_pdu_create failed.");
1352 sfree (vl.values);
1353 return (-1);
1354 }
1356 for (i = 0; i < data->values_len; i++)
1357 snmp_add_null_var (req, data->values[i].oid, data->values[i].oid_len);
1359 res = NULL;
1360 status = snmp_sess_synch_response (host->sess_handle, req, &res);
1362 if ((status != STAT_SUCCESS) || (res == NULL))
1363 {
1364 char *errstr = NULL;
1366 snmp_sess_error (host->sess_handle, NULL, NULL, &errstr);
1367 ERROR ("snmp plugin: host %s: snmp_sess_synch_response failed: %s",
1368 host->name, (errstr == NULL) ? "Unknown problem" : errstr);
1370 if (res != NULL)
1371 snmp_free_pdu (res);
1372 res = NULL;
1374 sfree (errstr);
1375 csnmp_host_close_session (host);
1377 return (-1);
1378 }
1380 vl.time = time (NULL);
1382 for (vb = res->variables; vb != NULL; vb = vb->next_variable)
1383 {
1384 #if COLLECT_DEBUG
1385 char buffer[1024];
1386 snprint_variable (buffer, sizeof (buffer),
1387 vb->name, vb->name_length, vb);
1388 DEBUG ("snmp plugin: Got this variable: %s", buffer);
1389 #endif /* COLLECT_DEBUG */
1391 for (i = 0; i < data->values_len; i++)
1392 if (snmp_oid_compare (data->values[i].oid, data->values[i].oid_len,
1393 vb->name, vb->name_length) == 0)
1394 vl.values[i] = csnmp_value_list_to_value (vb, ds->ds[i].type,
1395 data->scale, data->shift);
1396 } /* for (res->variables) */
1398 if (res != NULL)
1399 snmp_free_pdu (res);
1400 res = NULL;
1402 DEBUG ("snmp plugin: -> plugin_dispatch_values (&vl);");
1403 plugin_dispatch_values (&vl);
1404 sfree (vl.values);
1406 return (0);
1407 } /* int csnmp_read_value */
1409 static int csnmp_read_host (host_definition_t *host)
1410 {
1411 int i;
1412 time_t time_start;
1413 time_t time_end;
1415 time_start = time (NULL);
1416 DEBUG ("snmp plugin: csnmp_read_host (%s) started at %u;", host->name,
1417 (unsigned int) time_start);
1419 if (host->sess_handle == NULL)
1420 csnmp_host_open_session (host);
1422 if (host->sess_handle == NULL)
1423 return (-1);
1425 for (i = 0; i < host->data_list_len; i++)
1426 {
1427 data_definition_t *data = host->data_list[i];
1429 if (data->is_table)
1430 csnmp_read_table (host, data);
1431 else
1432 csnmp_read_value (host, data);
1433 }
1435 time_end = time (NULL);
1436 DEBUG ("snmp plugin: csnmp_read_host (%s) finished at %u;", host->name,
1437 (unsigned int) time_end);
1438 if ((time_end - time_start) > host->interval)
1439 {
1440 WARNING ("snmp plugin: Host `%s' should be queried every %i seconds, "
1441 "but reading all values takes %u seconds.",
1442 host->name, host->interval, (unsigned int) (time_end - time_start));
1443 }
1445 return (0);
1446 } /* int csnmp_read_host */
1448 static void *csnmp_read_thread (void *data)
1449 {
1450 host_definition_t *host;
1452 pthread_mutex_lock (&host_lock);
1453 while (do_shutdown == 0)
1454 {
1455 pthread_cond_wait (&host_cond, &host_lock);
1457 for (host = host_head; host != NULL; host = host->next)
1458 {
1459 if (do_shutdown != 0)
1460 break;
1461 if (host->state != STATE_WAIT)
1462 continue;
1464 host->state = STATE_BUSY;
1465 pthread_mutex_unlock (&host_lock);
1466 csnmp_read_host (host);
1467 pthread_mutex_lock (&host_lock);
1468 host->state = STATE_IDLE;
1469 } /* for (host) */
1470 } /* while (do_shutdown == 0) */
1471 pthread_mutex_unlock (&host_lock);
1473 pthread_exit ((void *) 0);
1474 return ((void *) 0);
1475 } /* void *csnmp_read_thread */
1477 static int csnmp_init (void)
1478 {
1479 host_definition_t *host;
1480 int i;
1482 if (host_head == NULL)
1483 {
1484 NOTICE ("snmp plugin: No host has been defined.");
1485 return (-1);
1486 }
1488 call_snmp_init_once ();
1490 threads_num = 0;
1491 for (host = host_head; host != NULL; host = host->next)
1492 {
1493 threads_num++;
1494 /* We need to initialize `interval' here, because `interval_g' isn't
1495 * initialized during `configure'. */
1496 host->next_update = time (NULL);
1497 if (host->interval == 0)
1498 {
1499 host->interval = interval_g;
1500 }
1501 else if (host->interval < interval_g)
1502 {
1503 host->interval = interval_g;
1504 WARNING ("snmp plugin: Data for host `%s' will be collected every %i seconds.",
1505 host->name, host->interval);
1506 }
1508 csnmp_host_open_session (host);
1509 } /* for (host) */
1511 /* Now start the reading threads */
1512 if (threads_num > 3)
1513 {
1514 threads_num = 3 + ((threads_num - 3) / 10);
1515 if (threads_num > 10)
1516 threads_num = 10;
1517 }
1519 threads = (pthread_t *) malloc (threads_num * sizeof (pthread_t));
1520 if (threads == NULL)
1521 {
1522 ERROR ("snmp plugin: malloc failed.");
1523 return (-1);
1524 }
1525 memset (threads, '\0', threads_num * sizeof (pthread_t));
1527 for (i = 0; i < threads_num; i++)
1528 pthread_create (threads + i, NULL, csnmp_read_thread, (void *) 0);
1530 return (0);
1531 } /* int csnmp_init */
1533 static int csnmp_read (void)
1534 {
1535 host_definition_t *host;
1536 time_t now;
1538 if (host_head == NULL)
1539 {
1540 INFO ("snmp plugin: No hosts configured.");
1541 return (-1);
1542 }
1544 now = time (NULL);
1546 pthread_mutex_lock (&host_lock);
1547 for (host = host_head; host != NULL; host = host->next)
1548 {
1549 if (host->state != STATE_IDLE)
1550 continue;
1552 /* Skip this host if the next or a later iteration will be sufficient. */
1553 if (host->next_update >= (now + interval_g))
1554 continue;
1556 host->state = STATE_WAIT;
1557 host->next_update = now + host->interval;
1558 } /* for (host) */
1560 pthread_cond_broadcast (&host_cond);
1561 pthread_mutex_unlock (&host_lock);
1563 return (0);
1564 } /* int csnmp_read */
1566 static int csnmp_shutdown (void)
1567 {
1568 host_definition_t *host_this;
1569 host_definition_t *host_next;
1571 data_definition_t *data_this;
1572 data_definition_t *data_next;
1574 int i;
1576 pthread_mutex_lock (&host_lock);
1577 do_shutdown = 1;
1578 pthread_cond_broadcast (&host_cond);
1579 pthread_mutex_unlock (&host_lock);
1581 for (i = 0; i < threads_num; i++)
1582 pthread_join (threads[i], NULL);
1584 /* Now that all the threads have exited, let's free all the global variables.
1585 * This isn't really neccessary, I guess, but I think it's good stile to do
1586 * so anyway. */
1587 host_this = host_head;
1588 host_head = NULL;
1589 while (host_this != NULL)
1590 {
1591 host_next = host_this->next;
1593 csnmp_host_close_session (host_this);
1595 sfree (host_this->name);
1596 sfree (host_this->address);
1597 sfree (host_this->community);
1598 sfree (host_this->data_list);
1599 sfree (host_this);
1601 host_this = host_next;
1602 }
1604 data_this = data_head;
1605 data_head = NULL;
1606 while (data_this != NULL)
1607 {
1608 data_next = data_this->next;
1610 sfree (data_this->name);
1611 sfree (data_this->type);
1612 sfree (data_this->values);
1613 sfree (data_this);
1615 data_this = data_next;
1616 }
1618 return (0);
1619 } /* int csnmp_shutdown */
1621 void module_register (void)
1622 {
1623 plugin_register_complex_config ("snmp", csnmp_config);
1624 plugin_register_init ("snmp", csnmp_init);
1625 plugin_register_read ("snmp", csnmp_read);
1626 plugin_register_shutdown ("snmp", csnmp_shutdown);
1627 } /* void module_register */
1629 /*
1630 * vim: shiftwidth=2 softtabstop=2 tabstop=8
1631 */