Added FortiAuthenticator support (#11633)

includes/definitions/discovery/fortiauthenticator.yaml

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+mib: FORTINET-FORTIAUTHENTICATOR-MIB
+modules:
+    processors:
+        data:
+            -
+                oid: facSysCpuUsage
+                num_oid: '.1.3.6.1.4.1.12356.113.1.4.{{ $index }}'
+                type: fortiauthenticator

includes/definitions/fortiauthenticator.yaml

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+os: fortiauthenticator
+text: 'Fortinet FortiAuthenticator'
+type: firewall
+icon: fortinet
+mib_dir:
+    - fortinet
+over:
+    - { graph: device_bits, text: 'Device Traffic' }
+    - { graph: device_processor, text: 'CPU Usage' }
+    - { graph: device_mempool, text: 'Memory Usage' }
+discovery:
+    - 
+        sysObjectID:
+            - .1.3.6.1.4.1.8072.3.2.10
+        sysDescr:
+            - 'FortiAuthenticator'
+    -
+        sysObjectID:
+            # Fireware 6.0+
+            - .1.3.6.1.4.1.12356.113.100.101

includes/discovery/mempools/fortiauthenticator.inc.php

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+<?php
+echo 'FORTIAUTHENTICATOR-MEMORY-POOL: ';
+$usage = str_replace('"', "", snmp_get($device, 'FORTINET-FORTIAUTHENTICATOR-MIB::facSysMemUsage.0', '-OvQ'));
+if (is_numeric($usage)) {
+    // get hardware memory: Total physical memory (RAM) installed (KB) - FortiAuthenticator uses Base 2 - Precision = 1024
+    discover_mempool($valid_mempool, $device, 0, 'fortiauthenticator', 'Physical Memory', '1024', null, null);
+}

includes/polling/mempools/fortiauthenticator.inc.php

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+<?php
+echo 'FortiAuthenticator MemPool';
+$mempool['perc'] = snmp_get($device, 'FORTINET-FORTIAUTHENTICATOR-MIB::facSysMemUsage.0', '-OvQ');
+// $mempool['total'] = (snmp_get($device,'FORTINET-FORTIAUTHENTICATOR-MIB::facSysMemCapacity.0', '-OvQ')) * $mempool['mempool_precision'];
+// Fixed value because facSysMemCapacity is not available - MemTotal: get hardware memory
+$mempool['total'] = 2056120 * $mempool['mempool_precision'];
+$mempool['used'] = round($mempool['total'] * ($mempool['perc'] / 100));
+$mempool['free'] = ($mempool['total'] - $mempool['used']);
+echo '(U: '.$mempool['used'].' T: '.$mempool['total'].' F: '.$mempool['free'].') ';

includes/polling/os/fortiauthenticator.inc.php

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+<?php
+
+$temp_data  = snmp_get_multi_oid($device, ['facSysSerial.0', 'facSysModel.0', 'facSysVersion.0'], '-OUQs', 'FORTINET-FORTIAUTHENTICATOR-MIB');
+$temp_version = explode(' ', $temp_data['facSysVersion.0']);
+
+$hardware        = $temp_data['facSysModel.0'];
+$serial          = $temp_data['facSysSerial.0'];
+$version         = $temp_version[1];
+
+unset($temp_data, $temp_version);