Added SNR Sensor to CMTS Arris (librenms#8840)

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includes/definitions/cmts.yaml

@@ -2,6 +2,8 @@ os: cmts
 text: 'Arris CMTS'
 type: network
 icon: arris
+mib_dir:
+    - arris
 over:
     - { graph: device_bits, text: 'Device Traffic' }
     - { graph: device_processor, text: 'CPU Usage' }

includes/discovery/sensors/pre-cache/cmts.inc.php

@@ -0,0 +1,34 @@
+<?php
+/**
+ * cmts.inc.php
+ *
+ * LibreNMS os sensor pre-cache module for Arris CMTS
+ *
+ * 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, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package    LibreNMS
+ * @link       http://librenms.org
+ * @copyright  2018 TheGreatDoc
+ * @author     TheGreatDoc
+ * Based on Neil Lathwood Cisco EPC files
+ */
+
+echo 'ifName ';
+$pre_cache['cmts_ifName'] = snmpwalk_cache_oid($device, 'ifName', array(), 'DOCS-IF-MIB');
+
+echo 'ifAlias ';
+$pre_cache['cmts_ifAlias'] = snmpwalk_cache_oid($device, 'ifAlias', array(), 'DOCS-IF-MIB');
+
+echo 'docsIfSignalQualityTable ';
+$pre_cache['cmts_docsIfSignalQualityTable'] = snmpwalk_cache_oid($device, 'docsIfSignalQualityTable', array(), 'DOCS-IF-MIB');

includes/discovery/sensors/snr/cmts.inc.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * cmts.inc.php
+ *
+ * LibreNMS snr discovery module for Arris CMTS
+ *
+ * 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, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package    LibreNMS
+ * @link       http://librenms.org
+ * @copyright  2018 TheGreatDoc
+ * @author     TheGreatDoc
+ * Based on Neil Lathwood Cisco EPC files
+ */
+
+foreach ($pre_cache['cmts_docsIfSignalQualityTable'] as $index => $data) {
+    if (is_numeric($data['docsIfSigQSignalNoise'])) {
+        $descr   = "Channel {$pre_cache['cmts_ifAlias'][$index]['ifAlias']} - {$pre_cache['cmts_ifName'][$index]['ifName']}";
+        $oid     = '.1.3.6.1.2.1.10.127.1.1.4.1.5.' . $index;
+        $divisor = 10;
+        $value   = $data['docsIfSigQSignalNoise'];
+        if (preg_match("/.0$/", $pre_cache['cmts_ifName'][$index]['ifName'])) {
+            discover_sensor($valid['sensor'], 'snr', $device, $oid, 'docsIfSigQSignalNoise.'.$index, 'cmts', $descr, $divisor, '1', null, null, null, null, $value);
+        }
+    }
+}