routeros-scripts/lease-script

#!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

:global LogPrintExit;

:if ([ :typeof $leaseActIP ] = "nothing" || \
     [ :typeof $leaseActMAC ] = "nothing" || \
     [ :typeof $leaseServerName ] = "nothing" || \
     [ :typeof $leaseBound ] = "nothing") do={
  $LogPrintExit error "This script is supposed to run from ip dhcp-server." true;
}

:local Scripts;
:local ScriptsAssign {
  "dhcp-to-dns";
  "collect-wireless-mac.local";
  "dhcp-lease-comment.local";
  "collect-wireless-mac.capsman";
  "dhcp-lease-comment.capsman"
}
:local ScriptsDeAssign {
  "dhcp-to-dns"
}

:local State "";
:if ($leaseBound = 0) do={
  :set State "de";
  :set Scripts $ScriptsDeAssign;
} else={
  :set Scripts $ScriptsAssign;
}

:log debug ("DHCP Server " . $leaseServerName . " " . \
    $State . "assigned lease " . $leaseActIP . " to " . $leaseActMAC);

# delay a moment to update the lease table, do not run in parallel for de/assign
:delay ((1 + $leaseBound) . "s");

:foreach Script in=$Scripts do={
  :if ([ :len [ / system script find where name=$Script ] ] > 0) do={
    :log debug ("Running script from lease-script: " . $Script);
    / system script run $Script;
  }
}