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diff --git a/src/snmp.c b/src/snmp.c
index 4bcdcf7d486f7a35554b3a64249938f72c0d5ab0..8673df199e9ffe135993986a24f5cc1e1607b50e 100644 (file)
--- a/src/snmp.c
+++ b/src/snmp.c
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;
* ! +-> 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_address
@@ -149,9 +153,7 @@ static int csnmp_config_add_data_type (data_definition_t *dd, oconfig_item_t *ci
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);
@@ -202,6 +204,30 @@ static int csnmp_config_add_data_instance (data_definition_t *dd, oconfig_item_t
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;
@@ -219,8 +245,8 @@ static int csnmp_config_add_data_values (data_definition_t *dd, oconfig_item_t *
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);
@@ -245,6 +271,34 @@ static int csnmp_config_add_data_values (data_definition_t *dd, oconfig_item_t *
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);
}
} /* void csnmp_host_open_session */
-static value_t csnmp_value_list_to_value (struct variable_list *vl, int type)
+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;
@@ -680,12 +744,143 @@ static value_t csnmp_value_list_to_value (struct variable_list *vl, int type)
{
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..");
+ 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;
+
+ strncpy (il->instance, (char *) ((vb->type == ASN_OCTET_STR)
+ ? vb->val.string
+ : vb->val.bitstring),
+ instance_len);
+ il->instance[instance_len] = '\0';
+
+ 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);
+ snprintf (il->instance, sizeof (il->instance),
+ "%llu", val.counter);
+ }
+ il->instance[sizeof (il->instance) - 1] = '\0';
+
+ /* 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)
@@ -697,6 +892,8 @@ static int csnmp_dispatch_table (host_definition_t *host, data_definition_t *dat
csnmp_table_values_t **value_table_ptr;
int i;
+ oid subid;
+ int have_more;
ds = plugin_get_ds (data->type);
if (!ds)
@@ -706,6 +903,8 @@ static int csnmp_dispatch_table (host_definition_t *host, data_definition_t *dat
}
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)
@@ -717,6 +916,7 @@ static int csnmp_dispatch_table (host_definition_t *host, data_definition_t *dat
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);
}
@@ -728,36 +928,91 @@ static int csnmp_dispatch_table (host_definition_t *host, data_definition_t *dat
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
+
+ {
+ char temp[DATA_MAX_NAME_LEN];
+
+ if (instance_list_ptr == NULL)
+ snprintf (temp, sizeof (temp), "%u",
+ (uint32_t) subid);
+ else
+ strncpy (temp, instance_list_ptr->instance,
+ sizeof (temp));
+ temp[sizeof (temp) - 1] = '\0';
+
+ if (data->instance_prefix == NULL)
+ strncpy (vl.type_instance, temp, sizeof (vl.type_instance));
+ else
+ snprintf (vl.type_instance, sizeof (vl.type_instance), "%s%s",
+ data->instance_prefix, temp);
+ vl.type_instance[sizeof (vl.type_instance) - 1] = '\0';
}
+ 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) */
+
+ subid++;
+ } /* while (have_more != 0) */
sfree (vl.values);
sfree (value_table_ptr);
@@ -813,16 +1068,22 @@ static int csnmp_read_table (host_definition_t *host, data_definition_t *data)
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);
}
status = 0;
while (status == 0)
{
- csnmp_list_instances_t *il;
-
req = snmp_pdu_create (SNMP_MSG_GETNEXT);
if (req == NULL)
{
@@ -872,79 +1131,47 @@ static int csnmp_read_table (host_definition_t *host, data_definition_t *data)
break;
}
- /* 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;
+ /* Check if all values (and possibly the instance) have left their
+ * subtree */
+ if (csnmp_check_res_left_subtree (host, data, res) != 0)
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))
+ /* if an instance-OID is configured.. */
+ if (data->instance.oid.oid_len > 0)
{
- char *ptr;
- size_t instance_len;
-
- instance_len = sizeof (il->instance) - 1;
- if (instance_len > vb->val_len)
- instance_len = vb->val_len;
-
- strncpy (il->instance, (char *) ((vb->type == ASN_OCTET_STR)
- ? vb->val.string
- : vb->val.bitstring),
- instance_len);
- il->instance[instance_len] = '\0';
-
- for (ptr = il->instance; *ptr != '\0'; ptr++)
+ /* 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)
{
- if ((*ptr > 0) && (*ptr < 32))
- *ptr = ' ';
- else if (*ptr == '/')
- *ptr = '_';
+ ERROR ("snmp plugin: csnmp_instance_list_add failed.");
+ status = -1;
+ break;
}
- DEBUG ("snmp plugin: il->instance = `%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 (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;
-
- for (i = 0; i < data->values_len; i++)
- {
- csnmp_table_values_t *vt;
- 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,
@@ -959,28 +1186,34 @@ static int csnmp_read_table (host_definition_t *host, data_definition_t *data)
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;
+ 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)
@@ -1110,7 +1343,8 @@ static int csnmp_read_value (host_definition_t *host, data_definition_t *data)
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);