* collectd - src/snmp.c
* Copyright (C) 2007-2012 Florian octo Forster
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; only version 2 of the License is applicable.
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
*
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
*
* Authors:
* Florian octo Forster <octo at collectd.org>
instance_t instance;
char *instance_prefix;
oid_t *values;
- int values_len;
+ size_t values_len;
double scale;
double shift;
struct data_definition_s *next;
dd->values = (oid_t *) malloc (sizeof (oid_t) * ci->values_num);
if (dd->values == NULL)
return (-1);
- dd->values_len = ci->values_num;
+ dd->values_len = (size_t) ci->values_num;
for (i = 0; i < ci->values_num; i++)
{
{
ERROR("snmp plugin: Can't allocate memory");
strarray_free(dd->ignores, dd->ignores_len);
- return (ENOMEM);
+ return (ENOMEM);
}
}
return 0;
for (i = 0; i < ci->children_num; i++)
{
oconfig_item_t *option = ci->children + i;
- status = 0;
if (strcasecmp ("Type", option->key) == 0)
status = cf_util_get_string(option, &dd->type);
return (-1);
}
- DEBUG ("snmp plugin: dd = { name = %s, type = %s, is_table = %s, values_len = %i }",
+ DEBUG ("snmp plugin: dd = { name = %s, type = %s, is_table = %s, values_len = %zu }",
dd->name, dd->type, (dd->is_table != 0) ? "true" : "false", dd->values_len);
if (data_head == NULL)
/* Registration stuff. */
char cb_name[DATA_MAX_NAME_LEN];
user_data_t cb_data;
- struct timespec cb_interval;
hd = (host_definition_t *) malloc (sizeof (host_definition_t));
if (hd == NULL)
cb_data.data = hd;
cb_data.free_func = csnmp_host_definition_destroy;
- CDTIME_T_TO_TIMESPEC (hd->interval, &cb_interval);
-
status = plugin_register_complex_read (/* group = */ NULL, cb_name,
- csnmp_read_host, /* interval = */ &cb_interval,
- /* user_data = */ &cb_data);
+ csnmp_read_host, hd->interval, /* user_data = */ &cb_data);
if (status != 0)
{
ERROR ("snmp plugin: Registering complex read function failed.");
status = parse_value (string, &ret, type);
if (status != 0)
{
- ERROR ("snmp plugin: csnmp_value_list_to_value: Parsing string as %s failed: %s",
+ ERROR ("snmp plugin: host %s: csnmp_value_list_to_value: Parsing string as %s failed: %s",
+ (host_name != NULL) ? host_name : "UNKNOWN",
DS_TYPE_TO_STRING (type), string);
}
}
return (ret);
} /* value_t csnmp_value_list_to_value */
+/* csnmp_strvbcopy_hexstring converts the bit string contained in "vb" to a hex
+ * representation and writes it to dst. Returns zero on success and ENOMEM if
+ * dst is not large enough to hold the string. dst is guaranteed to be
+ * nul-terminated. */
static int csnmp_strvbcopy_hexstring (char *dst, /* {{{ */
const struct variable_list *vb, size_t dst_size)
{
size_t buffer_free;
size_t i;
+ dst[0] = 0;
+
buffer_ptr = dst;
buffer_free = dst_size;
status = snprintf (buffer_ptr, buffer_free,
(i == 0) ? "%02x" : ":%02x", (unsigned int) vb->val.bitstring[i]);
+ assert (status >= 0);
- if (status >= buffer_free)
+ if (((size_t) status) >= buffer_free) /* truncated */
{
- buffer_ptr += (buffer_free - 1);
- *buffer_ptr = 0;
- return (dst_size + (buffer_free - status));
+ dst[dst_size - 1] = 0;
+ return ENOMEM;
}
else /* if (status < buffer_free) */
{
- buffer_ptr += status;
- buffer_free -= status;
+ buffer_ptr += (size_t) status;
+ buffer_free -= (size_t) status;
}
}
- return ((int) (dst_size - buffer_free));
+ return 0;
} /* }}} int csnmp_strvbcopy_hexstring */
+/* csnmp_strvbcopy copies the octet string or bit string contained in vb to
+ * dst. If non-printable characters are detected, it will switch to a hex
+ * representation of the string. Returns zero on success, EINVAL if vb does not
+ * contain a string and ENOMEM if dst is not large enough to contain the
+ * string. */
static int csnmp_strvbcopy (char *dst, /* {{{ */
const struct variable_list *vb, size_t dst_size)
{
dst[i] = src[i];
}
dst[num_chars] = 0;
+ dst[dst_size - 1] = 0;
- return ((int) vb->val_len);
+ if (dst_size <= vb->val_len)
+ return ENOMEM;
+
+ return 0;
} /* }}} int csnmp_strvbcopy */
static int csnmp_instance_list_add (csnmp_list_instances_t **head,
csnmp_list_instances_t *instance_list_ptr;
csnmp_table_values_t **value_table_ptr;
- int i;
+ size_t i;
_Bool have_more;
oid_t current_suffix;
return (-1);
}
assert (ds->ds_num == data->values_len);
+ assert (data->values_len > 0);
instance_list_ptr = instance_list;
- value_table_ptr = malloc (sizeof (*value_table_ptr) * data->values_len);
+ value_table_ptr = calloc (data->values_len, sizeof (*value_table_ptr));
if (value_table_ptr == NULL)
return (-1);
for (i = 0; i < data->values_len; i++)
value_table_ptr[i] = value_table[i];
- vl.values_len = ds->ds_num;
+ vl.values_len = data->values_len;
vl.values = malloc (sizeof (*vl.values) * vl.values_len);
if (vl.values == NULL)
{
const data_set_t *ds;
- uint32_t oid_list_len = (uint32_t) (data->values_len + 1);
+ size_t oid_list_len = data->values_len + 1;
/* Holds the last OID returned by the device. We use this in the GETNEXT
* request to proceed. */
oid_t oid_list[oid_list_len];
_Bool oid_list_todo[oid_list_len];
int status;
- int i;
- uint32_t j;
+ size_t i;
/* `value_list_head' and `value_list_tail' implement a linked list for each
* value. `instance_list_head' and `instance_list_tail' implement a linked list of
if (ds->ds_num != data->values_len)
{
- ERROR ("snmp plugin: DataSet `%s' requires %i values, but config talks about %i",
+ ERROR ("snmp plugin: DataSet `%s' requires %zu values, but config talks about %zu",
data->type, ds->ds_num, data->values_len);
return (-1);
}
+ assert (data->values_len > 0);
/* We need a copy of all the OIDs, because GETNEXT will destroy them. */
memcpy (oid_list, data->values, data->values_len * sizeof (oid_t));
else /* no InstanceFrom option specified. */
oid_list_len--;
- for (j = 0; j < oid_list_len; j++)
- oid_list_todo[j] = 1;
+ for (i = 0; i < oid_list_len; i++)
+ oid_list_todo[i] = 1;
/* We're going to construct n linked lists, one for each "value".
* value_list_head will contain pointers to the heads of these linked lists,
}
oid_list_todo_num = 0;
- for (j = 0; j < oid_list_len; j++)
+ for (i = 0; i < oid_list_len; i++)
{
/* Do not rerequest already finished OIDs */
- if (!oid_list_todo[j])
+ if (!oid_list_todo[i])
continue;
oid_list_todo_num++;
- snmp_add_null_var (req, oid_list[j].oid, oid_list[j].oid_len);
+ snmp_add_null_var (req, oid_list[i].oid, oid_list[i].oid_len);
}
if (oid_list_todo_num == 0)
snmp_free_pdu (res);
res = NULL;
+ /* snmp_synch_response already freed our PDU */
+ req = NULL;
sfree (errstr);
csnmp_host_close_session (host);
for (vb = res->variables, i = 0; (vb != NULL); vb = vb->next_variable, i++)
{
/* Calculate value index from todo list */
- while (!oid_list_todo[i] && (i < oid_list_len))
+ while ((i < oid_list_len) && !oid_list_todo[i])
i++;
/* An instance is configured and the res variable we process is the
if (csnmp_instance_list_add (&instance_list_head, &instance_list_tail,
res, host, data) != 0)
{
- ERROR ("snmp plugin: csnmp_instance_list_add failed.");
+ ERROR ("snmp plugin: host %s: csnmp_instance_list_add failed.",
+ host->name);
status = -1;
break;
}
ret = csnmp_oid_suffix (&suffix, &vb_name, data->values + i);
if (ret != 0)
{
- DEBUG ("snmp plugin: host = %s; data = %s; i = %i; "
+ DEBUG ("snmp plugin: host = %s; data = %s; i = %zu; "
"Value probably left its subtree.",
host->name, data->name, i);
oid_list_todo[i] = 0;
if ((value_list_tail[i] != NULL)
&& (csnmp_oid_compare (&suffix, &value_list_tail[i]->suffix) <= 0))
{
- DEBUG ("snmp plugin: host = %s; data = %s; i = %i; "
+ DEBUG ("snmp plugin: host = %s; data = %s; i = %zu; "
"Suffix is not increasing.",
host->name, data->name, i);
oid_list_todo[i] = 0;
snmp_free_pdu (res);
res = NULL;
+ if (req != NULL)
+ snmp_free_pdu (req);
+ req = NULL;
+
if (status == 0)
csnmp_dispatch_table (host, data, instance_list_head, value_list_head);
value_list_t vl = VALUE_LIST_INIT;
int status;
- int i;
+ size_t i;
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");
+ DEBUG ("snmp plugin: csnmp_read_value: host->sess_handle == NULL");
return (-1);
}
if (ds->ds_num != data->values_len)
{
- ERROR ("snmp plugin: DataSet `%s' requires %i values, but config talks about %i",
+ ERROR ("snmp plugin: DataSet `%s' requires %zu values, but config talks about %zu",
data->type, ds->ds_num, data->values_len);
return (-1);
}
projects / collectd.git / blobdiff