routeros-scripts/dhcp-lease-comment.template

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#!rsc
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# RouterOS script: dhcp-lease-comment%TEMPL%
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# Copyright (c) 2013-2018 Christian Hesse <mail@eworm.de>
#
# update dhcp-server lease comment with infos from access-list
#
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# !! This is just a template! Replace '%PATH%' with 'caps-man'
# !! or 'interface wireless'!
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:foreach lease in=[ / ip dhcp-server lease find where dynamic=yes ] do={
:local macaddress [ / ip dhcp-server lease get $lease mac-address ];
:local oldcomment [ / ip dhcp-server lease get $lease comment ];
:local newcomment;
:local accesslst [ :pick [ / %PATH% access-list find where mac-address=$macaddress ] 0 ];
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:if ( [ :len $accesslst ] > 0 ) do={
:set newcomment [ / %PATH% access-list get $accesslst comment ];
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}
:if ([ :len $newcomment ] != 0 && $oldcomment != $newcomment) do={
:log info ("Updating comment for DHCP lease " . $macaddress . ": " . $newcomment);
/ ip dhcp-server lease set comment=$newcomment $lease;
}
}