#include "common.h"
#include "plugin.h"
+#include <pthread.h>
+
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
struct oid_s
{
oid oid[MAX_OID_LEN];
- uint32_t oid_len;
+ size_t oid_len;
};
typedef struct oid_s oid_t;
char *type; /* used to find the data_set */
int is_table;
instance_t instance;
+ char *instance_prefix;
oid_t *values;
int values_len;
+ double scale;
+ double shift;
struct data_definition_s *next;
};
typedef struct data_definition_s data_definition_t;
char *address;
char *community;
int version;
- struct snmp_session sess;
+ void *sess_handle;
+ uint32_t interval;
+ time_t next_update;
data_definition_t **data_list;
int data_list_len;
+ enum /******************************************************/
+ { /* This host.. */
+ STATE_IDLE, /* - just sits there until `next_update < interval_g' */
+ STATE_WAIT, /* - waits to be queried. */
+ STATE_BUSY /* - is currently being queried. */
+ } state; /******************************************************/
struct host_definition_s *next;
};
typedef struct host_definition_s host_definition_t;
/*
* Private variables
*/
-data_definition_t *data_head = NULL;
-host_definition_t *host_head = NULL;
+static int do_shutdown = 0;
+
+pthread_t *threads = NULL;
+int threads_num = 0;
+
+static data_definition_t *data_head = NULL;
+static host_definition_t *host_head = NULL;
+
+static pthread_mutex_t host_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t host_cond = PTHREAD_COND_INITIALIZER;
/*
* Private functions
/*
* Callgraph for the config stuff:
* csnmp_config
+ * +-> call_snmp_init_once
* +-> csnmp_config_add_data
* ! +-> csnmp_config_add_data_type
* ! +-> csnmp_config_add_data_table
* ! +-> csnmp_config_add_data_instance
+ * ! +-> csnmp_config_add_data_instance_prefix
* ! +-> csnmp_config_add_data_values
* +-> csnmp_config_add_host
- * +-> csnmp_config_add_host_collect
+ * +-> csnmp_config_add_host_address
+ * +-> csnmp_config_add_host_community
+ * +-> csnmp_config_add_host_version
+ * +-> csnmp_config_add_host_collect
+ * +-> csnmp_config_add_host_interval
*/
static void call_snmp_init_once (void)
{
return (-1);
}
- if (dd->type != NULL)
- free (dd->type);
-
+ sfree (dd->type);
dd->type = strdup (ci->values[0].value.string);
if (dd->type == NULL)
return (-1);
else
{
/* Instance is a simple string */
- strncpy (dd->instance.string, ci->values[0].value.string, DATA_MAX_NAME_LEN - 1);
+ sstrncpy (dd->instance.string, ci->values[0].value.string,
+ sizeof (dd->instance.string));
}
return (0);
} /* int csnmp_config_add_data_instance */
+static int csnmp_config_add_data_instance_prefix (data_definition_t *dd,
+ oconfig_item_t *ci)
+{
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("snmp plugin: `InstancePrefix' needs exactly one string argument.");
+ return (-1);
+ }
+
+ if (!dd->is_table)
+ {
+ WARNING ("snmp plugin: data %s: InstancePrefix is ignored when `Table' "
+ "is set to `false'.", dd->name);
+ return (-1);
+ }
+
+ sfree (dd->instance_prefix);
+ dd->instance_prefix = strdup (ci->values[0].value.string);
+ if (dd->instance_prefix == NULL)
+ return (-1);
+
+ return (0);
+} /* int csnmp_config_add_data_instance_prefix */
+
static int csnmp_config_add_data_values (data_definition_t *dd, oconfig_item_t *ci)
{
int i;
return (-1);
}
- if (dd->values != NULL)
- free (dd->values);
+ sfree (dd->values);
+ dd->values_len = 0;
dd->values = (oid_t *) malloc (sizeof (oid_t) * ci->values_num);
if (dd->values == NULL)
return (-1);
return (0);
} /* int csnmp_config_add_data_instance */
+static int csnmp_config_add_data_shift (data_definition_t *dd, oconfig_item_t *ci)
+{
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
+ {
+ WARNING ("snmp plugin: The `Scale' config option needs exactly one number argument.");
+ return (-1);
+ }
+
+ dd->shift = ci->values[0].value.number;
+
+ return (0);
+} /* int csnmp_config_add_data_shift */
+
+static int csnmp_config_add_data_scale (data_definition_t *dd, oconfig_item_t *ci)
+{
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
+ {
+ WARNING ("snmp plugin: The `Scale' config option needs exactly one number argument.");
+ return (-1);
+ }
+
+ dd->scale = ci->values[0].value.number;
+
+ return (0);
+} /* int csnmp_config_add_data_scale */
+
static int csnmp_config_add_data (oconfig_item_t *ci)
{
data_definition_t *dd;
free (dd);
return (-1);
}
+ dd->scale = 1.0;
+ dd->shift = 0.0;
for (i = 0; i < ci->children_num; i++)
{
status = csnmp_config_add_data_table (dd, option);
else if (strcasecmp ("Instance", option->key) == 0)
status = csnmp_config_add_data_instance (dd, option);
+ else if (strcasecmp ("InstancePrefix", option->key) == 0)
+ status = csnmp_config_add_data_instance_prefix (dd, option);
else if (strcasecmp ("Values", option->key) == 0)
status = csnmp_config_add_data_values (dd, option);
+ else if (strcasecmp ("Shift", option->key) == 0)
+ status = csnmp_config_add_data_shift (dd, option);
+ else if (strcasecmp ("Scale", option->key) == 0)
+ status = csnmp_config_add_data_scale (dd, option);
else
{
WARNING ("snmp plugin: Option `%s' not allowed here.", option->key);
if (status != 0)
{
sfree (dd->name);
+ sfree (dd->instance_prefix);
sfree (dd->values);
sfree (dd);
return (-1);
DEBUG ("snmp plugin: host = %s; host->address = %s;",
hd->name, hd->address);
- hd->sess.peername = hd->address;
-
return (0);
} /* int csnmp_config_add_host_address */
DEBUG ("snmp plugin: host = %s; host->community = %s;",
hd->name, hd->community);
- hd->sess.community = (u_char *) hd->community;
- hd->sess.community_len = strlen (hd->community);
-
return (0);
} /* int csnmp_config_add_host_community */
hd->version = version;
- if (hd->version == 1)
- hd->sess.version = SNMP_VERSION_1;
- else
- hd->sess.version = SNMP_VERSION_2c;
-
return (0);
} /* int csnmp_config_add_host_address */
return (0);
} /* int csnmp_config_add_host_collect */
+static int csnmp_config_add_host_interval (host_definition_t *hd, oconfig_item_t *ci)
+{
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
+ {
+ WARNING ("snmp plugin: The `Interval' config option needs exactly one number argument.");
+ return (-1);
+ }
+
+ hd->interval = (int) ci->values[0].value.number;
+ if (hd->interval < 0)
+ hd->interval = 0;
+
+ return (0);
+} /* int csnmp_config_add_host_interval */
+
static int csnmp_config_add_host (oconfig_item_t *ci)
{
host_definition_t *hd;
return (-1);
}
- snmp_sess_init (&hd->sess);
- hd->sess.version = SNMP_VERSION_2c;
+ hd->sess_handle = NULL;
+ hd->interval = 0;
+ hd->next_update = 0;
+ hd->state = STATE_IDLE;
for (i = 0; i < ci->children_num; i++)
{
status = csnmp_config_add_host_version (hd, option);
else if (strcasecmp ("Collect", option->key) == 0)
csnmp_config_add_host_collect (hd, option);
+ else if (strcasecmp ("Interval", option->key) == 0)
+ csnmp_config_add_host_interval (hd, option);
else
{
WARNING ("snmp plugin: csnmp_config_add_host: Option `%s' not allowed here.", option->key);
return (0);
} /* int csnmp_config */
-static int csnmp_init (void)
+/* End of the config stuff. Now the interesting part begins */
+
+static void csnmp_host_close_session (host_definition_t *host)
{
- call_snmp_init_once ();
- return (0);
-}
+ if (host->sess_handle == NULL)
+ return;
-#if 0
-static void csnmp_submit (gauge_t snum, gauge_t mnum, gauge_t lnum)
+ snmp_sess_close (host->sess_handle);
+ host->sess_handle = NULL;
+} /* void csnmp_host_close_session */
+
+static void csnmp_host_open_session (host_definition_t *host)
{
- value_t values[3];
- value_list_t vl = VALUE_LIST_INIT;
+ struct snmp_session sess;
- values[0].gauge = snum;
- values[1].gauge = mnum;
- values[2].gauge = lnum;
+ if (host->sess_handle != NULL)
+ csnmp_host_close_session (host);
- vl.values = values;
- vl.values_len = STATIC_ARRAY_SIZE (values);
- vl.time = time (NULL);
- strcpy (vl.host, hostname_g);
- strcpy (vl.plugin, "load");
+ snmp_sess_init (&sess);
+ sess.peername = host->address;
+ sess.community = (u_char *) host->community;
+ sess.community_len = strlen (host->community);
+ sess.version = (host->version == 1) ? SNMP_VERSION_1 : SNMP_VERSION_2c;
- plugin_dispatch_values ("load", &vl);
-}
-#endif
+ /* snmp_sess_open will copy the `struct snmp_session *'. */
+ host->sess_handle = snmp_sess_open (&sess);
+
+ if (host->sess_handle == NULL)
+ {
+ char *errstr = NULL;
-static value_t csnmp_value_list_to_value (struct variable_list *vl, int type)
+ snmp_error (&sess, NULL, NULL, &errstr);
+
+ ERROR ("snmp plugin: host %s: snmp_sess_open failed: %s",
+ host->name, (errstr == NULL) ? "Unknown problem" : errstr);
+ sfree (errstr);
+ }
+} /* void csnmp_host_open_session */
+
+static value_t csnmp_value_list_to_value (struct variable_list *vl, int type,
+ double scale, double shift)
{
value_t ret;
uint64_t temp = 0;
if ((vl->type == ASN_INTEGER)
|| (vl->type == ASN_UINTEGER)
|| (vl->type == ASN_COUNTER)
+#ifdef ASN_TIMETICKS
+ || (vl->type == ASN_TIMETICKS)
+#endif
|| (vl->type == ASN_GAUGE))
{
temp = (uint32_t) *vl->val.integer;
{
ret.gauge = NAN;
if (defined != 0)
- ret.gauge = temp;
+ ret.gauge = (scale * temp) + shift;
}
return (ret);
} /* value_t csnmp_value_list_to_value */
+/* Returns true if all OIDs have left their subtree */
+static int csnmp_check_res_left_subtree (const host_definition_t *host,
+ const data_definition_t *data,
+ struct snmp_pdu *res)
+{
+ struct variable_list *vb;
+ int num_checked;
+ int num_left_subtree;
+ int i;
+
+ vb = res->variables;
+ if (vb == NULL)
+ return (-1);
+
+ num_checked = 0;
+ num_left_subtree = 0;
+
+ /* check all the variables and count how many have left their subtree */
+ for (vb = res->variables, i = 0;
+ (vb != NULL) && (i < data->values_len);
+ vb = vb->next_variable, i++)
+ {
+ num_checked++;
+ if (snmp_oid_ncompare (data->values[i].oid,
+ data->values[i].oid_len,
+ vb->name, vb->name_length,
+ data->values[i].oid_len) != 0)
+ num_left_subtree++;
+ }
+
+ /* check if enough variables have been returned */
+ if (i < data->values_len)
+ {
+ ERROR ("snmp plugin: host %s: Expected %i variables, but got only %i",
+ host->name, data->values_len, i);
+ return (-1);
+ }
+
+ if (data->instance.oid.oid_len > 0)
+ {
+ if (vb == NULL)
+ {
+ ERROR ("snmp plugin: host %s: Expected one more variable for "
+ "the instance..", host->name);
+ return (-1);
+ }
+
+ num_checked++;
+ if (snmp_oid_ncompare (data->instance.oid.oid,
+ data->instance.oid.oid_len,
+ vb->name, vb->name_length,
+ data->instance.oid.oid_len) != 0)
+ num_left_subtree++;
+ }
+
+ DEBUG ("snmp plugin: csnmp_check_res_left_subtree: %i of %i variables have "
+ "left their subtree",
+ num_left_subtree, num_checked);
+ if (num_left_subtree >= num_checked)
+ return (1);
+ return (0);
+} /* int csnmp_check_res_left_subtree */
+
+static int csnmp_instance_list_add (csnmp_list_instances_t **head,
+ csnmp_list_instances_t **tail,
+ const struct snmp_pdu *res)
+{
+ csnmp_list_instances_t *il;
+ struct variable_list *vb;
+
+ /* Set vb on the last variable */
+ for (vb = res->variables;
+ (vb != NULL) && (vb->next_variable != NULL);
+ vb = vb->next_variable)
+ /* do nothing */;
+ if (vb == NULL)
+ return (-1);
+
+ il = (csnmp_list_instances_t *) malloc (sizeof (csnmp_list_instances_t));
+ if (il == NULL)
+ {
+ ERROR ("snmp plugin: malloc failed.");
+ return (-1);
+ }
+ il->subid = vb->name[vb->name_length - 1];
+ il->next = NULL;
+
+ /* Get instance name */
+ if ((vb->type == ASN_OCTET_STR) || (vb->type == ASN_BIT_STR))
+ {
+ char *ptr;
+ size_t instance_len;
+
+ instance_len = sizeof (il->instance) - 1;
+ if (instance_len > vb->val_len)
+ instance_len = vb->val_len;
+
+ sstrncpy (il->instance, (char *) ((vb->type == ASN_OCTET_STR)
+ ? vb->val.string
+ : vb->val.bitstring),
+ instance_len);
+
+ for (ptr = il->instance; *ptr != '\0'; ptr++)
+ {
+ if ((*ptr > 0) && (*ptr < 32))
+ *ptr = ' ';
+ else if (*ptr == '/')
+ *ptr = '_';
+ }
+ DEBUG ("snmp plugin: il->instance = `%s';", il->instance);
+ }
+ else
+ {
+ value_t val = csnmp_value_list_to_value (vb, DS_TYPE_COUNTER, 1.0, 0.0);
+ ssnprintf (il->instance, sizeof (il->instance),
+ "%llu", val.counter);
+ }
+
+ /* TODO: Debugging output */
+
+ if (*head == NULL)
+ *head = il;
+ else
+ (*tail)->next = il;
+ *tail = il;
+
+ return (0);
+} /* int csnmp_instance_list_add */
+
static int csnmp_dispatch_table (host_definition_t *host, data_definition_t *data,
csnmp_list_instances_t *instance_list,
csnmp_table_values_t **value_table)
csnmp_table_values_t **value_table_ptr;
int i;
+ oid subid;
+ int have_more;
ds = plugin_get_ds (data->type);
if (!ds)
}
assert (ds->ds_num == data->values_len);
+ instance_list_ptr = instance_list;
+
value_table_ptr = (csnmp_table_values_t **) malloc (sizeof (csnmp_table_values_t *)
* data->values_len);
if (value_table_ptr == NULL)
vl.values = (value_t *) malloc (sizeof (value_t) * vl.values_len);
if (vl.values == NULL)
{
+ ERROR ("snmp plugin: malloc failed.");
sfree (value_table_ptr);
return (-1);
}
- strncpy (vl.host, host->name, sizeof (vl.host));
- vl.host[sizeof (vl.host) - 1] = '\0';
- strcpy (vl.plugin, "snmp");
+ sstrncpy (vl.host, host->name, sizeof (vl.host));
+ sstrncpy (vl.plugin, "snmp", sizeof (vl.plugin));
+ vl.interval = host->interval;
vl.time = time (NULL);
- for (instance_list_ptr = instance_list;
- instance_list_ptr != NULL;
- instance_list_ptr = instance_list_ptr->next)
+ subid = 0;
+ have_more = 1;
+
+ while (have_more != 0)
{
- strncpy (vl.type_instance, instance_list_ptr->instance, sizeof (vl.type_instance));
- vl.type_instance[sizeof (vl.type_instance) - 1] = '\0';
+ if (instance_list != NULL)
+ {
+ while ((instance_list_ptr != NULL)
+ && (instance_list_ptr->subid < subid))
+ instance_list_ptr = instance_list_ptr->next;
+
+ if (instance_list_ptr == NULL)
+ {
+ have_more = 0;
+ continue;
+ }
+ else if (instance_list_ptr->subid > subid)
+ {
+ subid = instance_list_ptr->subid;
+ continue;
+ }
+ } /* if (instance_list != NULL) */
for (i = 0; i < data->values_len; i++)
{
while ((value_table_ptr[i] != NULL)
- && (value_table_ptr[i]->subid < instance_list_ptr->subid))
+ && (value_table_ptr[i]->subid < subid))
value_table_ptr[i] = value_table_ptr[i]->next;
- if ((value_table_ptr[i] == NULL)
- || (value_table_ptr[i]->subid != instance_list_ptr->subid))
- break;
- vl.values[i] = value_table_ptr[i]->value;
- } /* for (data->values_len) */
- /* If the for-loop was aborted early, not all subid's match. */
+ if (value_table_ptr[i] == NULL)
+ {
+ have_more = 0;
+ break;
+ }
+ else if (value_table_ptr[i]->subid > subid)
+ {
+ subid = value_table_ptr[i]->subid;
+ break;
+ }
+ } /* for (i = 0; i < columns; i++) */
+ /* The subid has been increased - start scanning from the beginning
+ * again.. */
if (i < data->values_len)
- {
- DEBUG ("snmp plugin: host = %s; data = %s; i = %i; "
- "Skipping SUBID %i",
- host->name, data->name, i, instance_list_ptr->subid);
continue;
+
+ /* if we reach this line, all value_table_ptr[i] are non-NULL and are set
+ * to the same subid. instance_list_ptr is either NULL or points to the
+ * same subid, too. */
+#if COLLECT_DEBUG
+ for (i = 1; i < data->values_len; i++)
+ {
+ assert (value_table_ptr[i] != NULL);
+ assert (value_table_ptr[i-1]->subid == value_table_ptr[i]->subid);
+ }
+ assert ((instance_list_ptr == NULL)
+ || (instance_list_ptr->subid == value_table_ptr[0]->subid));
+#endif
+
+ sstrncpy (vl.type, data->type, sizeof (vl.type));
+
+ {
+ char temp[DATA_MAX_NAME_LEN];
+
+ if (instance_list_ptr == NULL)
+ ssnprintf (temp, sizeof (temp), "%u", (uint32_t) subid);
+ else
+ sstrncpy (temp, instance_list_ptr->instance, sizeof (temp));
+
+ if (data->instance_prefix == NULL)
+ sstrncpy (vl.type_instance, temp, sizeof (vl.type_instance));
+ else
+ ssnprintf (vl.type_instance, sizeof (vl.type_instance), "%s%s",
+ data->instance_prefix, temp);
}
+ for (i = 0; i < data->values_len; i++)
+ vl.values[i] = value_table_ptr[i]->value;
+
/* If we get here `vl.type_instance' and all `vl.values' have been set */
- plugin_dispatch_values (data->type, &vl);
- } /* for (instance_list) */
+ plugin_dispatch_values (&vl);
+
+ subid++;
+ } /* while (have_more != 0) */
sfree (vl.values);
sfree (value_table_ptr);
return (0);
} /* int csnmp_dispatch_table */
-static int csnmp_read_table (struct snmp_session *sess_ptr,
- host_definition_t *host, data_definition_t *data)
+static int csnmp_read_table (host_definition_t *host, data_definition_t *data)
{
struct snmp_pdu *req;
struct snmp_pdu *res;
csnmp_table_values_t **value_table;
csnmp_table_values_t **value_table_ptr;
- DEBUG ("snmp plugin: csnmp_read_value (host = %s, data = %s)",
+ DEBUG ("snmp plugin: csnmp_read_table (host = %s, data = %s)",
host->name, data->name);
+ if (host->sess_handle == NULL)
+ {
+ DEBUG ("snmp plugin: csnmp_read_table: host->sess_handle == NULL");
+ return (-1);
+ }
+
ds = plugin_get_ds (data->type);
if (!ds)
{
oid_list_len = data->values_len + 1;
oid_list = (oid_t *) malloc (sizeof (oid_t) * (oid_list_len));
if (oid_list == NULL)
+ {
+ ERROR ("snmp plugin: csnmp_read_table: malloc failed.");
return (-1);
- memcpy (oid_list, &data->instance.oid, sizeof (oid_t));
- for (i = 0; i < data->values_len; i++)
- memcpy (oid_list + (i + 1), data->values + i, sizeof (oid_t));
+ }
+ memcpy (oid_list, data->values, data->values_len * sizeof (oid_t));
+ if (data->instance.oid.oid_len > 0)
+ memcpy (oid_list + data->values_len, &data->instance.oid, sizeof (oid_t));
+ else
+ oid_list_len--;
/* Allocate the `value_table' */
value_table = (csnmp_table_values_t **) malloc (sizeof (csnmp_table_values_t *)
* 2 * data->values_len);
if (value_table == NULL)
{
+ ERROR ("snmp plugin: csnmp_read_table: malloc failed.");
sfree (oid_list);
return (-1);
}
- memset (value_table, '\0', sizeof (csnmp_table_values_t *) * 2);
+ memset (value_table, '\0', sizeof (csnmp_table_values_t *) * 2 * data->values_len);
value_table_ptr = value_table + data->values_len;
instance_list = NULL;
status = 0;
while (status == 0)
{
- csnmp_list_instances_t *il;
-
req = snmp_pdu_create (SNMP_MSG_GETNEXT);
if (req == NULL)
{
for (i = 0; i < oid_list_len; i++)
snmp_add_null_var (req, oid_list[i].oid, oid_list[i].oid_len);
- status = snmp_synch_response (sess_ptr, req, &res);
+ res = NULL;
+ status = snmp_sess_synch_response (host->sess_handle, req, &res);
- if (status != STAT_SUCCESS)
+ if ((status != STAT_SUCCESS) || (res == NULL))
{
- ERROR ("snmp plugin: snmp_synch_response failed.");
+ char *errstr = NULL;
+
+ snmp_sess_error (host->sess_handle, NULL, NULL, &errstr);
+ ERROR ("snmp plugin: host %s: snmp_sess_synch_response failed: %s",
+ host->name, (errstr == NULL) ? "Unknown problem" : errstr);
+
+ if (res != NULL)
+ snmp_free_pdu (res);
+ res = NULL;
+
+ sfree (errstr);
+ csnmp_host_close_session (host);
+
status = -1;
break;
}
vb = res->variables;
if (vb == NULL)
{
- status = -1;
- break;
- }
+ if (res != NULL)
+ snmp_free_pdu (res);
+ res = NULL;
- /* Check if we left the subtree */
- if (snmp_oid_ncompare (data->instance.oid.oid, data->instance.oid.oid_len,
- vb->name, vb->name_length,
- data->instance.oid.oid_len) != 0)
- break;
-
- /* Allocate a new `csnmp_list_instances_t', insert the instance name and
- * add it to the list */
- il = (csnmp_list_instances_t *) malloc (sizeof (csnmp_list_instances_t));
- if (il == NULL)
- {
status = -1;
break;
}
- il->subid = vb->name[vb->name_length - 1];
- il->next = NULL;
- /* Get instance name */
- if ((vb->type == ASN_OCTET_STR) || (vb->type == ASN_BIT_STR))
+ /* Check if all values (and possibly the instance) have left their
+ * subtree */
+ if (csnmp_check_res_left_subtree (host, data, res) != 0)
{
- strncpy (il->instance, (char *) vb->val.bitstring,
- sizeof (il->instance));
- il->instance[sizeof (il->instance) - 1] = '\0';
- DEBUG ("Before escape_slashes: %s", il->instance);
- escape_slashes (il->instance, strlen (il->instance));
- DEBUG ("After escape_slashes: %s", il->instance);
- }
- else
- {
- value_t val = csnmp_value_list_to_value (vb, DS_TYPE_COUNTER);
- snprintf (il->instance, sizeof (il->instance),
- "%llu", val.counter);
- }
- il->instance[sizeof (il->instance) - 1] = '\0';
- DEBUG ("snmp plugin: data = `%s'; il->instance = `%s';",
- data->name, il->instance);
+ if (res != NULL)
+ snmp_free_pdu (res);
+ res = NULL;
- if (instance_list_ptr == NULL)
- instance_list = il;
- else
- instance_list_ptr->next = il;
- instance_list_ptr = il;
-
- /* Copy OID to oid_list[0] */
- memcpy (oid_list[0].oid, vb->name, sizeof (oid) * vb->name_length);
- oid_list[0].oid_len = vb->name_length;
+ break;
+ }
- for (i = 0; i < data->values_len; i++)
+ /* if an instance-OID is configured.. */
+ if (data->instance.oid.oid_len > 0)
{
- csnmp_table_values_t *vt;
+ /* Allocate a new `csnmp_list_instances_t', insert the instance name and
+ * add it to the list */
+ if (csnmp_instance_list_add (&instance_list, &instance_list_ptr,
+ res) != 0)
+ {
+ ERROR ("snmp plugin: csnmp_instance_list_add failed.");
+ status = -1;
+ break;
+ }
- vb = vb->next_variable;
+ /* Set vb on the last variable */
+ for (vb = res->variables;
+ (vb != NULL) && (vb->next_variable != NULL);
+ vb = vb->next_variable)
+ /* do nothing */;
if (vb == NULL)
{
status = -1;
break;
}
+ /* Copy OID to oid_list[data->values_len] */
+ memcpy (oid_list[data->values_len].oid, vb->name,
+ sizeof (oid) * vb->name_length);
+ oid_list[data->values_len].oid_len = vb->name_length;
+ }
+
+ for (vb = res->variables, i = 0;
+ (vb != NULL) && (i < data->values_len);
+ vb = vb->next_variable, i++)
+ {
+ csnmp_table_values_t *vt;
+
/* Check if we left the subtree */
if (snmp_oid_ncompare (data->values[i].oid,
data->values[i].oid_len,
if ((value_table_ptr[i] != NULL)
&& (vb->name[vb->name_length - 1] <= value_table_ptr[i]->subid))
{
- DEBUG ("snmp plugin: host = %s; data = %s; i = %i; SUBID is not increasing.",
+ DEBUG ("snmp plugin: host = %s; data = %s; i = %i; "
+ "SUBID is not increasing.",
host->name, data->name, i);
continue;
}
vt = (csnmp_table_values_t *) malloc (sizeof (csnmp_table_values_t));
- if (vt != NULL)
+ if (vt == NULL)
{
- vt->subid = vb->name[vb->name_length - 1];
- vt->value = csnmp_value_list_to_value (vb, ds->ds[i].type);
- vt->next = NULL;
-
- if (value_table_ptr[i] == NULL)
- value_table[i] = vt;
- else
- value_table_ptr[i]->next = vt;
- value_table_ptr[i] = vt;
+ ERROR ("snmp plugin: malloc failed.");
+ status = -1;
+ break;
}
+ vt->subid = vb->name[vb->name_length - 1];
+ vt->value = csnmp_value_list_to_value (vb, ds->ds[i].type,
+ data->scale, data->shift);
+ vt->next = NULL;
+
+ if (value_table_ptr[i] == NULL)
+ value_table[i] = vt;
+ else
+ value_table_ptr[i]->next = vt;
+ value_table_ptr[i] = vt;
+
/* Copy OID to oid_list[i + 1] */
- memcpy (oid_list[i + 1].oid, vb->name, sizeof (oid) * vb->name_length);
- oid_list[i + 1].oid_len = vb->name_length;
- } /* for (data->values_len) */
+ memcpy (oid_list[i].oid, vb->name, sizeof (oid) * vb->name_length);
+ oid_list[i].oid_len = vb->name_length;
+ } /* for (i = data->values_len) */
if (res != NULL)
snmp_free_pdu (res);
return (0);
} /* int csnmp_read_table */
-static int csnmp_read_value (struct snmp_session *sess_ptr,
- host_definition_t *host, data_definition_t *data)
+static int csnmp_read_value (host_definition_t *host, data_definition_t *data)
{
struct snmp_pdu *req;
struct snmp_pdu *res;
DEBUG ("snmp plugin: csnmp_read_value (host = %s, data = %s)",
host->name, data->name);
+ if (host->sess_handle == NULL)
+ {
+ DEBUG ("snmp plugin: csnmp_read_table: host->sess_handle == NULL");
+ return (-1);
+ }
+
ds = plugin_get_ds (data->type);
if (!ds)
{
vl.values[i].gauge = NAN;
}
- strncpy (vl.host, host->name, sizeof (vl.host));
- vl.host[sizeof (vl.host) - 1] = '\0';
- strcpy (vl.plugin, "snmp");
- strncpy (vl.type_instance, data->instance.string, sizeof (vl.type_instance));
- vl.type_instance[sizeof (vl.type_instance) - 1] = '\0';
+ sstrncpy (vl.host, host->name, sizeof (vl.host));
+ sstrncpy (vl.plugin, "snmp", sizeof (vl.plugin));
+ sstrncpy (vl.type, data->type, sizeof (vl.type));
+ sstrncpy (vl.type_instance, data->instance.string, sizeof (vl.type_instance));
+
+ vl.interval = host->interval;
req = snmp_pdu_create (SNMP_MSG_GET);
if (req == NULL)
for (i = 0; i < data->values_len; i++)
snmp_add_null_var (req, data->values[i].oid, data->values[i].oid_len);
- status = snmp_synch_response (sess_ptr, req, &res);
- if (status != STAT_SUCCESS)
+ res = NULL;
+ status = snmp_sess_synch_response (host->sess_handle, req, &res);
+
+ if ((status != STAT_SUCCESS) || (res == NULL))
{
- ERROR ("snmp plugin: snmp_synch_response failed.");
- sfree (vl.values);
+ char *errstr = NULL;
+
+ snmp_sess_error (host->sess_handle, NULL, NULL, &errstr);
+ ERROR ("snmp plugin: host %s: snmp_sess_synch_response failed: %s",
+ host->name, (errstr == NULL) ? "Unknown problem" : errstr);
+
+ if (res != NULL)
+ snmp_free_pdu (res);
+ res = NULL;
+
+ sfree (errstr);
+ csnmp_host_close_session (host);
+
return (-1);
}
for (vb = res->variables; vb != NULL; vb = vb->next_variable)
{
+#if COLLECT_DEBUG
char buffer[1024];
snprint_variable (buffer, sizeof (buffer),
vb->name, vb->name_length, vb);
DEBUG ("snmp plugin: Got this variable: %s", buffer);
+#endif /* COLLECT_DEBUG */
for (i = 0; i < data->values_len; i++)
if (snmp_oid_compare (data->values[i].oid, data->values[i].oid_len,
vb->name, vb->name_length) == 0)
- vl.values[i] = csnmp_value_list_to_value (vb, ds->ds[i].type);
+ vl.values[i] = csnmp_value_list_to_value (vb, ds->ds[i].type,
+ data->scale, data->shift);
} /* for (res->variables) */
- snmp_free_pdu (res);
+ if (res != NULL)
+ snmp_free_pdu (res);
+ res = NULL;
- DEBUG ("snmp plugin: -> plugin_dispatch_values (%s, &vl);", data->type);
- plugin_dispatch_values (data->type, &vl);
+ DEBUG ("snmp plugin: -> plugin_dispatch_values (&vl);");
+ plugin_dispatch_values (&vl);
sfree (vl.values);
return (0);
static int csnmp_read_host (host_definition_t *host)
{
- struct snmp_session *sess_ptr;
int i;
+ time_t time_start;
+ time_t time_end;
- DEBUG ("snmp plugin: csnmp_read_host (%s);", host->name);
+ time_start = time (NULL);
+ DEBUG ("snmp plugin: csnmp_read_host (%s) started at %u;", host->name,
+ (unsigned int) time_start);
- sess_ptr = snmp_open (&host->sess);
- if (sess_ptr == NULL)
- {
- snmp_perror ("snmp_open");
- ERROR ("snmp plugin: snmp_open failed.");
+ if (host->sess_handle == NULL)
+ csnmp_host_open_session (host);
+
+ if (host->sess_handle == NULL)
return (-1);
- }
for (i = 0; i < host->data_list_len; i++)
{
data_definition_t *data = host->data_list[i];
if (data->is_table)
- csnmp_read_table (sess_ptr, host, data);
+ csnmp_read_table (host, data);
else
- csnmp_read_value (sess_ptr, host, data);
+ csnmp_read_value (host, data);
+ }
+
+ time_end = time (NULL);
+ DEBUG ("snmp plugin: csnmp_read_host (%s) finished at %u;", host->name,
+ (unsigned int) time_end);
+ if ((time_end - time_start) > host->interval)
+ {
+ WARNING ("snmp plugin: Host `%s' should be queried every %i seconds, "
+ "but reading all values takes %lu seconds.",
+ host->name, host->interval, (unsigned long)(time_end - time_start));
}
- snmp_close (sess_ptr);
return (0);
} /* int csnmp_read_host */
+static void *csnmp_read_thread (void *data)
+{
+ host_definition_t *host;
+
+ pthread_mutex_lock (&host_lock);
+ while (do_shutdown == 0)
+ {
+ pthread_cond_wait (&host_cond, &host_lock);
+
+ for (host = host_head; host != NULL; host = host->next)
+ {
+ if (do_shutdown != 0)
+ break;
+ if (host->state != STATE_WAIT)
+ continue;
+
+ host->state = STATE_BUSY;
+ pthread_mutex_unlock (&host_lock);
+ csnmp_read_host (host);
+ pthread_mutex_lock (&host_lock);
+ host->state = STATE_IDLE;
+ } /* for (host) */
+ } /* while (do_shutdown == 0) */
+ pthread_mutex_unlock (&host_lock);
+
+ pthread_exit ((void *) 0);
+ return ((void *) 0);
+} /* void *csnmp_read_thread */
+
+static int csnmp_init (void)
+{
+ host_definition_t *host;
+ int i;
+
+ if (host_head == NULL)
+ {
+ NOTICE ("snmp plugin: No host has been defined.");
+ return (-1);
+ }
+
+ call_snmp_init_once ();
+
+ threads_num = 0;
+ for (host = host_head; host != NULL; host = host->next)
+ {
+ threads_num++;
+ /* We need to initialize `interval' here, because `interval_g' isn't
+ * initialized during `configure'. */
+ host->next_update = time (NULL);
+ if (host->interval == 0)
+ {
+ host->interval = interval_g;
+ }
+ else if (host->interval < interval_g)
+ {
+ host->interval = interval_g;
+ WARNING ("snmp plugin: Data for host `%s' will be collected every %i seconds.",
+ host->name, host->interval);
+ }
+
+ csnmp_host_open_session (host);
+ } /* for (host) */
+
+ /* Now start the reading threads */
+ if (threads_num > 3)
+ {
+ threads_num = 3 + ((threads_num - 3) / 10);
+ if (threads_num > 10)
+ threads_num = 10;
+ }
+
+ threads = (pthread_t *) malloc (threads_num * sizeof (pthread_t));
+ if (threads == NULL)
+ {
+ ERROR ("snmp plugin: malloc failed.");
+ return (-1);
+ }
+ memset (threads, '\0', threads_num * sizeof (pthread_t));
+
+ for (i = 0; i < threads_num; i++)
+ pthread_create (threads + i, NULL, csnmp_read_thread, (void *) 0);
+
+ return (0);
+} /* int csnmp_init */
+
static int csnmp_read (void)
{
host_definition_t *host;
+ time_t now;
if (host_head == NULL)
{
return (-1);
}
+ now = time (NULL);
+
+ pthread_mutex_lock (&host_lock);
for (host = host_head; host != NULL; host = host->next)
- csnmp_read_host (host);
+ {
+ if (host->state != STATE_IDLE)
+ continue;
+
+ /* Skip this host if the next or a later iteration will be sufficient. */
+ if (host->next_update >= (now + interval_g))
+ continue;
+
+ host->state = STATE_WAIT;
+ host->next_update = now + host->interval;
+ } /* for (host) */
+
+ pthread_cond_broadcast (&host_cond);
+ pthread_mutex_unlock (&host_lock);
return (0);
} /* int csnmp_read */
+static int csnmp_shutdown (void)
+{
+ host_definition_t *host_this;
+ host_definition_t *host_next;
+
+ data_definition_t *data_this;
+ data_definition_t *data_next;
+
+ int i;
+
+ pthread_mutex_lock (&host_lock);
+ do_shutdown = 1;
+ pthread_cond_broadcast (&host_cond);
+ pthread_mutex_unlock (&host_lock);
+
+ for (i = 0; i < threads_num; i++)
+ pthread_join (threads[i], NULL);
+
+ /* Now that all the threads have exited, let's free all the global variables.
+ * This isn't really neccessary, I guess, but I think it's good stile to do
+ * so anyway. */
+ host_this = host_head;
+ host_head = NULL;
+ while (host_this != NULL)
+ {
+ host_next = host_this->next;
+
+ csnmp_host_close_session (host_this);
+
+ sfree (host_this->name);
+ sfree (host_this->address);
+ sfree (host_this->community);
+ sfree (host_this->data_list);
+ sfree (host_this);
+
+ host_this = host_next;
+ }
+
+ data_this = data_head;
+ data_head = NULL;
+ while (data_this != NULL)
+ {
+ data_next = data_this->next;
+
+ sfree (data_this->name);
+ sfree (data_this->type);
+ sfree (data_this->values);
+ sfree (data_this);
+
+ data_this = data_next;
+ }
+
+ return (0);
+} /* int csnmp_shutdown */
+
void module_register (void)
{
plugin_register_complex_config ("snmp", csnmp_config);
plugin_register_init ("snmp", csnmp_init);
plugin_register_read ("snmp", csnmp_read);
+ plugin_register_shutdown ("snmp", csnmp_shutdown);
} /* void module_register */
/*
projects / collectd.git / blobdiff