routeros-scripts/lease-script

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#!rsc by RouterOS
# RouterOS script: lease-script
# Copyright (c) 2013-2021 Christian Hesse <mail@eworm.de>
# https://git.eworm.de/cgit/routeros-scripts/about/COPYING.md
#
# run scripts on DHCP lease
# https://git.eworm.de/cgit/routeros-scripts/about/doc/lease-script.md
:local 0 "lease-script";
:global GlobalFunctionsReady;
:while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
:global IfThenElse;
:global LogPrintExit2;
:global RandomDelay;
:if ([ :typeof $leaseActIP ] = "nothing" || \
[ :typeof $leaseActMAC ] = "nothing" || \
[ :typeof $leaseServerName ] = "nothing" || \
[ :typeof $leaseBound ] = "nothing") do={
$LogPrintExit2 error $0 ("This script is supposed to run from ip dhcp-server.") true;
}
:local State ([ $IfThenElse ($leaseBound = 0) "de" "" ] . "assign");
$LogPrintExit2 debug $0 ("DHCP Server " . $leaseServerName . " " . \
$State . "ed lease " . $leaseActIP . " to " . $leaseActMAC) false;
# delay a moment to update the lease table, do not run in parallel for de/assign...
:delay ((1 + $leaseBound) . "s");
# ... or simultaneous deassign
$RandomDelay (([ :tonum $leaseBound ] ^ 1) * 750) "ms";
:foreach Script in=[ / system script find where source~("\n# provides: lease-script " . $State . "\n") ] do={
:local ScriptName [ / system script get $Script name ];
:do {
$LogPrintExit2 debug $0 ("Running script: " . $ScriptName) false;
/ system script run $Script;
} on-error={
$LogPrintExit2 warning $0 ("Running script '" . $ScriptName . "' failed!") false;
}
}