From 230a8d804a09379037186883a83511485c159f42 Mon Sep 17 00:00:00 2001
From: alejandro <alejandro.sanchez@pandorafms.com>
Date: Thu, 16 Mar 2023 10:16:14 +0100
Subject: [PATCH] added powershell dchp plugin

---
 pandora_plugins/Dhcp/pandora_dhcp.ps1 | 85 +++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 pandora_plugins/Dhcp/pandora_dhcp.ps1

diff --git a/pandora_plugins/Dhcp/pandora_dhcp.ps1 b/pandora_plugins/Dhcp/pandora_dhcp.ps1
new file mode 100644
index 0000000000..0b50e00e5f
--- /dev/null
+++ b/pandora_plugins/Dhcp/pandora_dhcp.ps1
@@ -0,0 +1,85 @@
+#Plugin for monitoring Microsoft Exchange Server.
+#
+# Pandora FMS Agent Plugin for dchp.
+#
+#(c) Alejandro Sánchez <alejandro.sanchez@pandorafms.com> 
+# v1.2, 26 enero 2023
+# ------------------------------------------------------------------------
+
+
+function print_module {
+
+	param ([string]$module_name,[string]$module_type,[string]$module_value,[string]$module_desc)
+
+	echo "<module>"
+	echo "<name>$module_name</name>"
+	echo "<type>$module_type</type>"
+	echo "<data><![CDATA[$module_value]]></data>"
+	echo "<description><![CDATA[$module_desc]]></description>"
+	echo "</module>"
+
+}
+
+#$LinuxCurrentIP=$() 2> $NULL
+$WindowsCurrentIP=$((Get-NetIPConfiguration | Where-Object { $_.IPv4DefaultGateway -ne $null -and $_.NetAdapter.Status -ne "Disconnected" }).IPv4Address.IPAddress) 2> $NULL
+$Scopes=$(get-dhcpserverv4scope | ConvertTo-Csv -NoTypeInformation) 2> $NULL
+$Scopes=$(get-dhcpserverv4scope | Select ScopeId |ConvertTo-Csv -NoTypeInformation) 2> $NULL
+$ScopeIds=$(((get-dhcpserverv4scope).ScopeId).IPAddressToString) 2> $NULL
+
+$avalaible_ips=0
+$count_reservation=0
+$count_leases=0
+ForEach($scope_ids in $Scopes)
+{
+if($scope_ids -notmatch 'ScopeId')
+{
+$scope_ids = $scope_ids -replace '"', ""
+$scope_ids =[IPAddress]$scope_ids 
+$ScopeRange=$(get-dhcpserverv4scope -ScopeId $scope_ids | ConvertTo-Csv -NoTypeInformation) 
+$ScopeMask=$(((get-dhcpserverv4scope -ScopeId $scope_ids).SubnetMask).IPAddressToString) 2> $NULL
+$PercentageInUse=$((get-dhcpserverv4scopestatistics -ScopeId $scope_ids).PercentageInUse) 2> $NULL
+# $Free=$((get-dhcpserverv4scopestatistics -ScopeId $scope_ids).Free) 2> $NULL
+# $InUse=$((get-dhcpserverv4scopestatistics -ScopeId $scope_ids).InUse) 2> $NULL
+# $Reserved=$((get-dhcpserverv4scopestatistics -ScopeId $scope_ids).Reserved) 2> $NULL
+# $Pending=$((get-dhcpserverv4scopestatistics -ScopeId $scope_ids).Pending) 2> $NULL
+#$AddressAssignedList=$(Get-DhcpServerv4Lease -ScopeId $scope_ids | ConvertTo-Csv -NoTypeInformation) 2> $NULL
+$AddressAssignedList=$((Get-DhcpServerv4Lease -ScopeId $scope_ids).AddressState) 2> $NULL
+#$Reservations=$(Get-DhcpServerv4Reservation -ScopeId $scope_ids | ConvertTo-Csv -NoTypeInformation) 2> $NULL
+$Reservations=$((Get-DhcpServerv4Reservation -ScopeId $scope_ids).AddressState) 2> $NULL
+$ExclusionRanges=$(Get-DhcpServerv4ExclusionRange -ScopeId $scope_ids | ConvertTo-Csv -NoTypeInformation) 2> $NULL
+$Start_range=((Get-DhcpServerv4ExclusionRange -ScopeId $scope_ids).StartRange.IPAddressToString) 2> $NULL
+$End_range=((Get-DhcpServerv4ExclusionRange -ScopeId $scope_ids).EndRange.IPAddressToString) 2> $NULL
+
+
+## reservation 
+ForEach($reservation in $Reservations){
+if ($Reservations -match "InactiveReservation"){$count_reservation=$count_reservation+0}else {if ($Reservations){$count_reservation=$count_reservation+1}else {$count_reservation=$count_reservation+0} }
+}
+## leases 
+ForEach($lease in $AddressAssignedList){
+if ($AddressAssignedList -match "InactiveReservation"){$count_leases=$count_leases+0}else {if ($Reservations){$count_reservation=$count_reservation+1}else {$count_reservation=$count_reservation+0} }
+}
+
+$count_assigned=$count_reservation+$count_leases
+
+# last octet value of an IP address
+$exc_start=$Start_range.Split('.')[-1]
+$exc_end=$End_range.Split('.')[-1]
+
+# avalaible end range - start range +1
+$avalaible=[int]$exc_end - [int]$exc_start +1
+
+$free= $avalaible - $count_reservation
+
+print_module "[$scope_ids] - dhcp usage" "generic_data" "$PercentageInUse" "Used percentage"
+print_module "[$scope_ids] - dhcp reserved ips" "generic_data" "$count_reservation" "reservations"
+print_module "[$scope_ids] - dhcp assigned ips" "generic_data" "$count_assigned" "assigned ips"
+print_module "[$scope_ids] - dhcp avalaible ips" "generic_data" "$avalaible" "Available and reserved ips"
+print_module "[$scope_ids] - dhcp free ips" "generic_data" "$free" "Available ips (not reserved)"
+
+#reset
+$count_reservation=0
+$count_leases=0
+}
+}
+