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 static value_t csnmp_value_list_to_value (struct variable_list *vl, int type,
696 double scale, double shift)
697 {
698 value_t ret;
699 uint64_t temp = 0;
700 int defined = 1;
702 if ((vl->type == ASN_INTEGER)
703 || (vl->type == ASN_UINTEGER)
704 || (vl->type == ASN_COUNTER)
705 #ifdef ASN_TIMETICKS
706 || (vl->type == ASN_TIMETICKS)
707 #endif
708 || (vl->type == ASN_GAUGE))
709 {
710 temp = (uint32_t) *vl->val.integer;
711 DEBUG ("snmp plugin: Parsed int32 value is %"PRIu64".", temp);
712 }
713 else if (vl->type == ASN_COUNTER64)
714 {
715 temp = (uint32_t) vl->val.counter64->high;
716 temp = temp << 32;
717 temp += (uint32_t) vl->val.counter64->low;
718 DEBUG ("snmp plugin: Parsed int64 value is %"PRIu64".", temp);
719 }
720 else if (vl->type == ASN_OCTET_STR)
721 {
722 /* We'll handle this later.. */
723 }
724 else
725 {
726 WARNING ("snmp plugin: I don't know the ASN type `%i'", (int) vl->type);
727 defined = 0;
728 }
730 if (vl->type == ASN_OCTET_STR)
731 {
732 char *string;
733 char *endptr;
735 string = (char *) vl->val.string;
736 endptr = NULL;
738 if (string != NULL)
739 {
740 if (type == DS_TYPE_COUNTER)
741 ret.counter = (counter_t) strtoll (string, &endptr, /* base = */ 0);
742 else if (type == DS_TYPE_GAUGE)
743 ret.gauge = (gauge_t) strtod (string, &endptr);
744 }
746 /* Check if an error occurred */
747 if ((string == NULL) || (endptr == string))
748 {
749 if (type == DS_TYPE_COUNTER)
750 ret.counter = 0;
751 else if (type == DS_TYPE_GAUGE)
752 ret.gauge = NAN;
753 }
754 }
755 else if (type == DS_TYPE_COUNTER)
756 {
757 ret.counter = temp;
758 }
759 else if (type == DS_TYPE_GAUGE)
760 {
761 ret.gauge = NAN;
762 if (defined != 0)
763 ret.gauge = (scale * temp) + shift;
764 }
766 return (ret);
767 } /* value_t csnmp_value_list_to_value */
769 /* Returns true if all OIDs have left their subtree */
770 static int csnmp_check_res_left_subtree (const host_definition_t *host,
771 const data_definition_t *data,
772 struct snmp_pdu *res)
773 {
774 struct variable_list *vb;
775 int num_checked;
776 int num_left_subtree;
777 int i;
779 vb = res->variables;
780 if (vb == NULL)
781 return (-1);
783 num_checked = 0;
784 num_left_subtree = 0;
786 /* check all the variables and count how many have left their subtree */
787 for (vb = res->variables, i = 0;
788 (vb != NULL) && (i < data->values_len);
789 vb = vb->next_variable, i++)
790 {
791 num_checked++;
792 if (snmp_oid_ncompare (data->values[i].oid,
793 data->values[i].oid_len,
794 vb->name, vb->name_length,
795 data->values[i].oid_len) != 0)
796 num_left_subtree++;
797 }
799 /* check if enough variables have been returned */
800 if (i < data->values_len)
801 {
802 ERROR ("snmp plugin: host %s: Expected %i variables, but got only %i",
803 host->name, data->values_len, i);
804 return (-1);
805 }
807 if (data->instance.oid.oid_len > 0)
808 {
809 if (vb == NULL)
810 {
811 ERROR ("snmp plugin: host %s: Expected one more variable for "
812 "the instance..", host->name);
813 return (-1);
814 }
816 num_checked++;
817 if (snmp_oid_ncompare (data->instance.oid.oid,
818 data->instance.oid.oid_len,
819 vb->name, vb->name_length,
820 data->instance.oid.oid_len) != 0)
821 num_left_subtree++;
822 }
824 DEBUG ("snmp plugin: csnmp_check_res_left_subtree: %i of %i variables have "
825 "left their subtree",
826 num_left_subtree, num_checked);
827 if (num_left_subtree >= num_checked)
828 return (1);
829 return (0);
830 } /* int csnmp_check_res_left_subtree */
832 static int csnmp_instance_list_add (csnmp_list_instances_t **head,
833 csnmp_list_instances_t **tail,
834 const struct snmp_pdu *res)
835 {
836 csnmp_list_instances_t *il;
837 struct variable_list *vb;
839 /* Set vb on the last variable */
840 for (vb = res->variables;
841 (vb != NULL) && (vb->next_variable != NULL);
842 vb = vb->next_variable)
843 /* do nothing */;
844 if (vb == NULL)
845 return (-1);
847 il = (csnmp_list_instances_t *) malloc (sizeof (csnmp_list_instances_t));
848 if (il == NULL)
849 {
850 ERROR ("snmp plugin: malloc failed.");
851 return (-1);
852 }
853 il->subid = vb->name[vb->name_length - 1];
854 il->next = NULL;
856 /* Get instance name */
857 if ((vb->type == ASN_OCTET_STR) || (vb->type == ASN_BIT_STR))
858 {
859 char *ptr;
860 size_t instance_len;
862 instance_len = sizeof (il->instance) - 1;
863 if (instance_len > vb->val_len)
864 instance_len = vb->val_len;
866 if (instance_len < 1)
867 {
868 ERROR ("snmp plugin: csnmp_instance_list_add: instance_len = %zu, "
869 "which is less than one.", instance_len);
870 sfree (il);
871 return (-1);
872 }
874 sstrncpy (il->instance, (char *) ((vb->type == ASN_OCTET_STR)
875 ? vb->val.string
876 : vb->val.bitstring),
877 instance_len);
879 for (ptr = il->instance; *ptr != '\0'; ptr++)
880 {
881 if ((*ptr > 0) && (*ptr < 32))
882 *ptr = ' ';
883 else if (*ptr == '/')
884 *ptr = '_';
885 }
886 DEBUG ("snmp plugin: il->instance = `%s';", il->instance);
887 }
888 else
889 {
890 value_t val = csnmp_value_list_to_value (vb, DS_TYPE_COUNTER, 1.0, 0.0);
891 ssnprintf (il->instance, sizeof (il->instance),
892 "%llu", val.counter);
893 }
895 /* TODO: Debugging output */
897 if (*head == NULL)
898 *head = il;
899 else
900 (*tail)->next = il;
901 *tail = il;
903 return (0);
904 } /* int csnmp_instance_list_add */
906 static int csnmp_dispatch_table (host_definition_t *host, data_definition_t *data,
907 csnmp_list_instances_t *instance_list,
908 csnmp_table_values_t **value_table)
909 {
910 const data_set_t *ds;
911 value_list_t vl = VALUE_LIST_INIT;
913 csnmp_list_instances_t *instance_list_ptr;
914 csnmp_table_values_t **value_table_ptr;
916 int i;
917 oid subid;
918 int have_more;
920 ds = plugin_get_ds (data->type);
921 if (!ds)
922 {
923 ERROR ("snmp plugin: DataSet `%s' not defined.", data->type);
924 return (-1);
925 }
926 assert (ds->ds_num == data->values_len);
928 instance_list_ptr = instance_list;
930 value_table_ptr = (csnmp_table_values_t **) malloc (sizeof (csnmp_table_values_t *)
931 * data->values_len);
932 if (value_table_ptr == NULL)
933 return (-1);
934 for (i = 0; i < data->values_len; i++)
935 value_table_ptr[i] = value_table[i];
937 vl.values_len = ds->ds_num;
938 vl.values = (value_t *) malloc (sizeof (value_t) * vl.values_len);
939 if (vl.values == NULL)
940 {
941 ERROR ("snmp plugin: malloc failed.");
942 sfree (value_table_ptr);
943 return (-1);
944 }
946 sstrncpy (vl.host, host->name, sizeof (vl.host));
947 sstrncpy (vl.plugin, "snmp", sizeof (vl.plugin));
949 vl.interval = host->interval;
950 vl.time = time (NULL);
952 subid = 0;
953 have_more = 1;
955 while (have_more != 0)
956 {
957 if (instance_list != NULL)
958 {
959 while ((instance_list_ptr != NULL)
960 && (instance_list_ptr->subid < subid))
961 instance_list_ptr = instance_list_ptr->next;
963 if (instance_list_ptr == NULL)
964 {
965 have_more = 0;
966 continue;
967 }
968 else if (instance_list_ptr->subid > subid)
969 {
970 subid = instance_list_ptr->subid;
971 continue;
972 }
973 } /* if (instance_list != NULL) */
975 for (i = 0; i < data->values_len; i++)
976 {
977 while ((value_table_ptr[i] != NULL)
978 && (value_table_ptr[i]->subid < subid))
979 value_table_ptr[i] = value_table_ptr[i]->next;
981 if (value_table_ptr[i] == NULL)
982 {
983 have_more = 0;
984 break;
985 }
986 else if (value_table_ptr[i]->subid > subid)
987 {
988 subid = value_table_ptr[i]->subid;
989 break;
990 }
991 } /* for (i = 0; i < columns; i++) */
992 /* The subid has been increased - start scanning from the beginning
993 * again.. */
994 if (i < data->values_len)
995 continue;
997 /* if we reach this line, all value_table_ptr[i] are non-NULL and are set
998 * to the same subid. instance_list_ptr is either NULL or points to the
999 * same subid, too. */
1000 #if COLLECT_DEBUG
1001 for (i = 1; i < data->values_len; i++)
1002 {
1003 assert (value_table_ptr[i] != NULL);
1004 assert (value_table_ptr[i-1]->subid == value_table_ptr[i]->subid);
1005 }
1006 assert ((instance_list_ptr == NULL)
1007 || (instance_list_ptr->subid == value_table_ptr[0]->subid));
1008 #endif
1010 sstrncpy (vl.type, data->type, sizeof (vl.type));
1012 {
1013 char temp[DATA_MAX_NAME_LEN];
1015 if (instance_list_ptr == NULL)
1016 ssnprintf (temp, sizeof (temp), "%u", (uint32_t) subid);
1017 else
1018 sstrncpy (temp, instance_list_ptr->instance, sizeof (temp));
1020 if (data->instance_prefix == NULL)
1021 sstrncpy (vl.type_instance, temp, sizeof (vl.type_instance));
1022 else
1023 ssnprintf (vl.type_instance, sizeof (vl.type_instance), "%s%s",
1024 data->instance_prefix, temp);
1025 }
1027 for (i = 0; i < data->values_len; i++)
1028 vl.values[i] = value_table_ptr[i]->value;
1030 /* If we get here `vl.type_instance' and all `vl.values' have been set */
1031 plugin_dispatch_values (&vl);
1033 subid++;
1034 } /* while (have_more != 0) */
1036 sfree (vl.values);
1037 sfree (value_table_ptr);
1039 return (0);
1040 } /* int csnmp_dispatch_table */
1042 static int csnmp_read_table (host_definition_t *host, data_definition_t *data)
1043 {
1044 struct snmp_pdu *req;
1045 struct snmp_pdu *res;
1046 struct variable_list *vb;
1048 const data_set_t *ds;
1049 oid_t *oid_list;
1050 uint32_t oid_list_len;
1052 int status;
1053 int i;
1055 /* `value_table' and `value_table_ptr' implement a linked list for each
1056 * value. `instance_list' and `instance_list_ptr' implement a linked list of
1057 * instance names. This is used to jump gaps in the table. */
1058 csnmp_list_instances_t *instance_list;
1059 csnmp_list_instances_t *instance_list_ptr;
1060 csnmp_table_values_t **value_table;
1061 csnmp_table_values_t **value_table_ptr;
1063 DEBUG ("snmp plugin: csnmp_read_table (host = %s, data = %s)",
1064 host->name, data->name);
1066 if (host->sess_handle == NULL)
1067 {
1068 DEBUG ("snmp plugin: csnmp_read_table: host->sess_handle == NULL");
1069 return (-1);
1070 }
1072 ds = plugin_get_ds (data->type);
1073 if (!ds)
1074 {
1075 ERROR ("snmp plugin: DataSet `%s' not defined.", data->type);
1076 return (-1);
1077 }
1079 if (ds->ds_num != data->values_len)
1080 {
1081 ERROR ("snmp plugin: DataSet `%s' requires %i values, but config talks about %i",
1082 data->type, ds->ds_num, data->values_len);
1083 return (-1);
1084 }
1086 /* We need a copy of all the OIDs, because GETNEXT will destroy them. */
1087 oid_list_len = data->values_len + 1;
1088 oid_list = (oid_t *) malloc (sizeof (oid_t) * (oid_list_len));
1089 if (oid_list == NULL)
1090 {
1091 ERROR ("snmp plugin: csnmp_read_table: malloc failed.");
1092 return (-1);
1093 }
1094 memcpy (oid_list, data->values, data->values_len * sizeof (oid_t));
1095 if (data->instance.oid.oid_len > 0)
1096 memcpy (oid_list + data->values_len, &data->instance.oid, sizeof (oid_t));
1097 else
1098 oid_list_len--;
1100 /* Allocate the `value_table' */
1101 value_table = (csnmp_table_values_t **) malloc (sizeof (csnmp_table_values_t *)
1102 * 2 * data->values_len);
1103 if (value_table == NULL)
1104 {
1105 ERROR ("snmp plugin: csnmp_read_table: malloc failed.");
1106 sfree (oid_list);
1107 return (-1);
1108 }
1109 memset (value_table, '\0', sizeof (csnmp_table_values_t *) * 2 * data->values_len);
1110 value_table_ptr = value_table + data->values_len;
1112 instance_list = NULL;
1113 instance_list_ptr = NULL;
1115 status = 0;
1116 while (status == 0)
1117 {
1118 req = snmp_pdu_create (SNMP_MSG_GETNEXT);
1119 if (req == NULL)
1120 {
1121 ERROR ("snmp plugin: snmp_pdu_create failed.");
1122 status = -1;
1123 break;
1124 }
1126 for (i = 0; i < oid_list_len; i++)
1127 snmp_add_null_var (req, oid_list[i].oid, oid_list[i].oid_len);
1129 res = NULL;
1130 status = snmp_sess_synch_response (host->sess_handle, req, &res);
1132 if ((status != STAT_SUCCESS) || (res == NULL))
1133 {
1134 char *errstr = NULL;
1136 snmp_sess_error (host->sess_handle, NULL, NULL, &errstr);
1137 ERROR ("snmp plugin: host %s: snmp_sess_synch_response failed: %s",
1138 host->name, (errstr == NULL) ? "Unknown problem" : errstr);
1140 if (res != NULL)
1141 snmp_free_pdu (res);
1142 res = NULL;
1144 sfree (errstr);
1145 csnmp_host_close_session (host);
1147 status = -1;
1148 break;
1149 }
1150 status = 0;
1151 assert (res != NULL);
1153 vb = res->variables;
1154 if (vb == NULL)
1155 {
1156 if (res != NULL)
1157 snmp_free_pdu (res);
1158 res = NULL;
1160 status = -1;
1161 break;
1162 }
1164 /* Check if all values (and possibly the instance) have left their
1165 * subtree */
1166 if (csnmp_check_res_left_subtree (host, data, res) != 0)
1167 {
1168 if (res != NULL)
1169 snmp_free_pdu (res);
1170 res = NULL;
1172 break;
1173 }
1175 /* if an instance-OID is configured.. */
1176 if (data->instance.oid.oid_len > 0)
1177 {
1178 /* Allocate a new `csnmp_list_instances_t', insert the instance name and
1179 * add it to the list */
1180 if (csnmp_instance_list_add (&instance_list, &instance_list_ptr,
1181 res) != 0)
1182 {
1183 ERROR ("snmp plugin: csnmp_instance_list_add failed.");
1184 status = -1;
1185 break;
1186 }
1188 /* Set vb on the last variable */
1189 for (vb = res->variables;
1190 (vb != NULL) && (vb->next_variable != NULL);
1191 vb = vb->next_variable)
1192 /* do nothing */;
1193 if (vb == NULL)
1194 {
1195 status = -1;
1196 break;
1197 }
1199 /* Copy OID to oid_list[data->values_len] */
1200 memcpy (oid_list[data->values_len].oid, vb->name,
1201 sizeof (oid) * vb->name_length);
1202 oid_list[data->values_len].oid_len = vb->name_length;
1203 }
1205 for (vb = res->variables, i = 0;
1206 (vb != NULL) && (i < data->values_len);
1207 vb = vb->next_variable, i++)
1208 {
1209 csnmp_table_values_t *vt;
1211 /* Check if we left the subtree */
1212 if (snmp_oid_ncompare (data->values[i].oid,
1213 data->values[i].oid_len,
1214 vb->name, vb->name_length,
1215 data->values[i].oid_len) != 0)
1216 {
1217 DEBUG ("snmp plugin: host = %s; data = %s; Value %i left its subtree.",
1218 host->name, data->name, i);
1219 continue;
1220 }
1222 if ((value_table_ptr[i] != NULL)
1223 && (vb->name[vb->name_length - 1] <= value_table_ptr[i]->subid))
1224 {
1225 DEBUG ("snmp plugin: host = %s; data = %s; i = %i; "
1226 "SUBID is not increasing.",
1227 host->name, data->name, i);
1228 continue;
1229 }
1231 vt = (csnmp_table_values_t *) malloc (sizeof (csnmp_table_values_t));
1232 if (vt == NULL)
1233 {
1234 ERROR ("snmp plugin: malloc failed.");
1235 status = -1;
1236 break;
1237 }
1239 vt->subid = vb->name[vb->name_length - 1];
1240 vt->value = csnmp_value_list_to_value (vb, ds->ds[i].type,
1241 data->scale, data->shift);
1242 vt->next = NULL;
1244 if (value_table_ptr[i] == NULL)
1245 value_table[i] = vt;
1246 else
1247 value_table_ptr[i]->next = vt;
1248 value_table_ptr[i] = vt;
1250 /* Copy OID to oid_list[i + 1] */
1251 memcpy (oid_list[i].oid, vb->name, sizeof (oid) * vb->name_length);
1252 oid_list[i].oid_len = vb->name_length;
1253 } /* for (i = data->values_len) */
1255 if (res != NULL)
1256 snmp_free_pdu (res);
1257 res = NULL;
1258 } /* while (status == 0) */
1260 if (status == 0)
1261 csnmp_dispatch_table (host, data, instance_list, value_table);
1263 /* Free all allocated variables here */
1264 while (instance_list != NULL)
1265 {
1266 instance_list_ptr = instance_list->next;
1267 sfree (instance_list);
1268 instance_list = instance_list_ptr;
1269 }
1271 for (i = 0; i < data->values_len; i++)
1272 {
1273 csnmp_table_values_t *tmp;
1274 while (value_table[i] != NULL)
1275 {
1276 tmp = value_table[i]->next;
1277 sfree (value_table[i]);
1278 value_table[i] = tmp;
1279 }
1280 }
1282 sfree (value_table);
1283 sfree (oid_list);
1285 return (0);
1286 } /* int csnmp_read_table */
1288 static int csnmp_read_value (host_definition_t *host, data_definition_t *data)
1289 {
1290 struct snmp_pdu *req;
1291 struct snmp_pdu *res;
1292 struct variable_list *vb;
1294 const data_set_t *ds;
1295 value_list_t vl = VALUE_LIST_INIT;
1297 int status;
1298 int i;
1300 DEBUG ("snmp plugin: csnmp_read_value (host = %s, data = %s)",
1301 host->name, data->name);
1303 if (host->sess_handle == NULL)
1304 {
1305 DEBUG ("snmp plugin: csnmp_read_table: host->sess_handle == NULL");
1306 return (-1);
1307 }
1309 ds = plugin_get_ds (data->type);
1310 if (!ds)
1311 {
1312 ERROR ("snmp plugin: DataSet `%s' not defined.", data->type);
1313 return (-1);
1314 }
1316 if (ds->ds_num != data->values_len)
1317 {
1318 ERROR ("snmp plugin: DataSet `%s' requires %i values, but config talks about %i",
1319 data->type, ds->ds_num, data->values_len);
1320 return (-1);
1321 }
1323 vl.values_len = ds->ds_num;
1324 vl.values = (value_t *) malloc (sizeof (value_t) * vl.values_len);
1325 if (vl.values == NULL)
1326 return (-1);
1327 for (i = 0; i < vl.values_len; i++)
1328 {
1329 if (ds->ds[i].type == DS_TYPE_COUNTER)
1330 vl.values[i].counter = 0;
1331 else
1332 vl.values[i].gauge = NAN;
1333 }
1335 sstrncpy (vl.host, host->name, sizeof (vl.host));
1336 sstrncpy (vl.plugin, "snmp", sizeof (vl.plugin));
1337 sstrncpy (vl.type, data->type, sizeof (vl.type));
1338 sstrncpy (vl.type_instance, data->instance.string, sizeof (vl.type_instance));
1340 vl.interval = host->interval;
1342 req = snmp_pdu_create (SNMP_MSG_GET);
1343 if (req == NULL)
1344 {
1345 ERROR ("snmp plugin: snmp_pdu_create failed.");
1346 sfree (vl.values);
1347 return (-1);
1348 }
1350 for (i = 0; i < data->values_len; i++)
1351 snmp_add_null_var (req, data->values[i].oid, data->values[i].oid_len);
1353 res = NULL;
1354 status = snmp_sess_synch_response (host->sess_handle, req, &res);
1356 if ((status != STAT_SUCCESS) || (res == NULL))
1357 {
1358 char *errstr = NULL;
1360 snmp_sess_error (host->sess_handle, NULL, NULL, &errstr);
1361 ERROR ("snmp plugin: host %s: snmp_sess_synch_response failed: %s",
1362 host->name, (errstr == NULL) ? "Unknown problem" : errstr);
1364 if (res != NULL)
1365 snmp_free_pdu (res);
1366 res = NULL;
1368 sfree (errstr);
1369 csnmp_host_close_session (host);
1371 return (-1);
1372 }
1374 vl.time = time (NULL);
1376 for (vb = res->variables; vb != NULL; vb = vb->next_variable)
1377 {
1378 #if COLLECT_DEBUG
1379 char buffer[1024];
1380 snprint_variable (buffer, sizeof (buffer),
1381 vb->name, vb->name_length, vb);
1382 DEBUG ("snmp plugin: Got this variable: %s", buffer);
1383 #endif /* COLLECT_DEBUG */
1385 for (i = 0; i < data->values_len; i++)
1386 if (snmp_oid_compare (data->values[i].oid, data->values[i].oid_len,
1387 vb->name, vb->name_length) == 0)
1388 vl.values[i] = csnmp_value_list_to_value (vb, ds->ds[i].type,
1389 data->scale, data->shift);
1390 } /* for (res->variables) */
1392 if (res != NULL)
1393 snmp_free_pdu (res);
1394 res = NULL;
1396 DEBUG ("snmp plugin: -> plugin_dispatch_values (&vl);");
1397 plugin_dispatch_values (&vl);
1398 sfree (vl.values);
1400 return (0);
1401 } /* int csnmp_read_value */
1403 static int csnmp_read_host (host_definition_t *host)
1404 {
1405 int i;
1406 time_t time_start;
1407 time_t time_end;
1409 time_start = time (NULL);
1410 DEBUG ("snmp plugin: csnmp_read_host (%s) started at %u;", host->name,
1411 (unsigned int) time_start);
1413 if (host->sess_handle == NULL)
1414 csnmp_host_open_session (host);
1416 if (host->sess_handle == NULL)
1417 return (-1);
1419 for (i = 0; i < host->data_list_len; i++)
1420 {
1421 data_definition_t *data = host->data_list[i];
1423 if (data->is_table)
1424 csnmp_read_table (host, data);
1425 else
1426 csnmp_read_value (host, data);
1427 }
1429 time_end = time (NULL);
1430 DEBUG ("snmp plugin: csnmp_read_host (%s) finished at %u;", host->name,
1431 (unsigned int) time_end);
1432 if ((time_end - time_start) > host->interval)
1433 {
1434 WARNING ("snmp plugin: Host `%s' should be queried every %i seconds, "
1435 "but reading all values takes %u seconds.",
1436 host->name, host->interval, (unsigned int) (time_end - time_start));
1437 }
1439 return (0);
1440 } /* int csnmp_read_host */
1442 static void *csnmp_read_thread (void *data)
1443 {
1444 host_definition_t *host;
1446 pthread_mutex_lock (&host_lock);
1447 while (do_shutdown == 0)
1448 {
1449 pthread_cond_wait (&host_cond, &host_lock);
1451 for (host = host_head; host != NULL; host = host->next)
1452 {
1453 if (do_shutdown != 0)
1454 break;
1455 if (host->state != STATE_WAIT)
1456 continue;
1458 host->state = STATE_BUSY;
1459 pthread_mutex_unlock (&host_lock);
1460 csnmp_read_host (host);
1461 pthread_mutex_lock (&host_lock);
1462 host->state = STATE_IDLE;
1463 } /* for (host) */
1464 } /* while (do_shutdown == 0) */
1465 pthread_mutex_unlock (&host_lock);
1467 pthread_exit ((void *) 0);
1468 return ((void *) 0);
1469 } /* void *csnmp_read_thread */
1471 static int csnmp_init (void)
1472 {
1473 host_definition_t *host;
1474 int i;
1476 if (host_head == NULL)
1477 {
1478 NOTICE ("snmp plugin: No host has been defined.");
1479 return (-1);
1480 }
1482 call_snmp_init_once ();
1484 threads_num = 0;
1485 for (host = host_head; host != NULL; host = host->next)
1486 {
1487 threads_num++;
1488 /* We need to initialize `interval' here, because `interval_g' isn't
1489 * initialized during `configure'. */
1490 host->next_update = time (NULL);
1491 if (host->interval == 0)
1492 {
1493 host->interval = interval_g;
1494 }
1495 else if (host->interval < interval_g)
1496 {
1497 host->interval = interval_g;
1498 WARNING ("snmp plugin: Data for host `%s' will be collected every %i seconds.",
1499 host->name, host->interval);
1500 }
1502 csnmp_host_open_session (host);
1503 } /* for (host) */
1505 /* Now start the reading threads */
1506 if (threads_num > 3)
1507 {
1508 threads_num = 3 + ((threads_num - 3) / 10);
1509 if (threads_num > 10)
1510 threads_num = 10;
1511 }
1513 threads = (pthread_t *) malloc (threads_num * sizeof (pthread_t));
1514 if (threads == NULL)
1515 {
1516 ERROR ("snmp plugin: malloc failed.");
1517 return (-1);
1518 }
1519 memset (threads, '\0', threads_num * sizeof (pthread_t));
1521 for (i = 0; i < threads_num; i++)
1522 pthread_create (threads + i, NULL, csnmp_read_thread, (void *) 0);
1524 return (0);
1525 } /* int csnmp_init */
1527 static int csnmp_read (void)
1528 {
1529 host_definition_t *host;
1530 time_t now;
1532 if (host_head == NULL)
1533 {
1534 INFO ("snmp plugin: No hosts configured.");
1535 return (-1);
1536 }
1538 now = time (NULL);
1540 pthread_mutex_lock (&host_lock);
1541 for (host = host_head; host != NULL; host = host->next)
1542 {
1543 if (host->state != STATE_IDLE)
1544 continue;
1546 /* Skip this host if the next or a later iteration will be sufficient. */
1547 if (host->next_update >= (now + interval_g))
1548 continue;
1550 host->state = STATE_WAIT;
1551 host->next_update = now + host->interval;
1552 } /* for (host) */
1554 pthread_cond_broadcast (&host_cond);
1555 pthread_mutex_unlock (&host_lock);
1557 return (0);
1558 } /* int csnmp_read */
1560 static int csnmp_shutdown (void)
1561 {
1562 host_definition_t *host_this;
1563 host_definition_t *host_next;
1565 data_definition_t *data_this;
1566 data_definition_t *data_next;
1568 int i;
1570 pthread_mutex_lock (&host_lock);
1571 do_shutdown = 1;
1572 pthread_cond_broadcast (&host_cond);
1573 pthread_mutex_unlock (&host_lock);
1575 for (i = 0; i < threads_num; i++)
1576 pthread_join (threads[i], NULL);
1578 /* Now that all the threads have exited, let's free all the global variables.
1579 * This isn't really neccessary, I guess, but I think it's good stile to do
1580 * so anyway. */
1581 host_this = host_head;
1582 host_head = NULL;
1583 while (host_this != NULL)
1584 {
1585 host_next = host_this->next;
1587 csnmp_host_close_session (host_this);
1589 sfree (host_this->name);
1590 sfree (host_this->address);
1591 sfree (host_this->community);
1592 sfree (host_this->data_list);
1593 sfree (host_this);
1595 host_this = host_next;
1596 }
1598 data_this = data_head;
1599 data_head = NULL;
1600 while (data_this != NULL)
1601 {
1602 data_next = data_this->next;
1604 sfree (data_this->name);
1605 sfree (data_this->type);
1606 sfree (data_this->values);
1607 sfree (data_this);
1609 data_this = data_next;
1610 }
1612 return (0);
1613 } /* int csnmp_shutdown */
1615 void module_register (void)
1616 {
1617 plugin_register_complex_config ("snmp", csnmp_config);
1618 plugin_register_init ("snmp", csnmp_init);
1619 plugin_register_read ("snmp", csnmp_read);
1620 plugin_register_shutdown ("snmp", csnmp_shutdown);
1621 } /* void module_register */
1623 /*
1624 * vim: shiftwidth=2 softtabstop=2 tabstop=8
1625 */