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#!rsc by RouterOS
# RouterOS script: log-forward
# Copyright (c) 2020-2023 Christian Hesse <mail@eworm.de>
# https://git.eworm.de/cgit/routeros-scripts/about/COPYING.md
#
# forward log messages via notification
# https://git.eworm.de/cgit/routeros-scripts/about/doc/log-forward.md
:local 0 "log-forward";
:global GlobalFunctionsReady;
:while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
:global Identity;
:global LogForwardFilter;
:global LogForwardFilterMessage;
:global LogForwardInclude;
:global LogForwardIncludeMessage;
:global LogForwardLast;
:global LogForwardRateLimit;
:global NotificationsWithSymbols;
:global EitherOr;
:global HexToNum;
:global IfThenElse;
:global LogForwardFilterLogForwarding;
:global LogPrintExit2;
:global ScriptLock;
:global SendNotification2;
:global SymbolForNotification;
$ScriptLock $0;
:if ([ :typeof $LogForwardRateLimit ] = "nothing") do={
:set LogForwardRateLimit 0;
}
:if ($LogForwardRateLimit > 30) do={
:set LogForwardRateLimit ($LogForwardRateLimit - 1);
$LogPrintExit2 info $0 ("Rate limit in action, not forwarding logs, if any!") true;
}
:local Count 0;
:local Duplicates false;
:local Last [ $IfThenElse ([ :len $LogForwardLast ] > 0) [ $HexToNum $LogForwardLast ] -1 ];
:local Messages "";
:local Warning false;
:local MessageVal;
:local MessageDups ({});
:local LogForwardFilterLogForwardingCached [ $EitherOr [ $LogForwardFilterLogForwarding ] ("\$^") ];
:foreach Message in=[ /log/find where (!(message="") and \
!(message~$LogForwardFilterLogForwardingCached) and \
!(topics~$LogForwardFilter) and !(message~$LogForwardFilterMessage)) or \
topics~$LogForwardInclude or message~$LogForwardIncludeMessage ] do={
:set MessageVal [ /log/get $Message ];
:if ($Last < [ $HexToNum ($MessageVal->".id") ]) do={
:local DupCount ($MessageDups->($MessageVal->"message"));
:if ($MessageVal->"topics" ~ "(emergency|alert|critical|error|warning)") do={
:set Warning true;
}
:if ($DupCount < 3) do={
:set Messages ($Messages . "\n" . [ $IfThenElse ($NotificationsWithSymbols = true) (" \E2\97\8F ") ] . \
$MessageVal->"time" . " " . [ :tostr ($MessageVal->"topics") ] . " " . $MessageVal->"message");
} else={
:set Duplicates true;
}
:set ($MessageDups->($MessageVal->"message")) ($DupCount + 1);
:set Count ($Count + 1);
}
}
:if ($Count > 0) do={
:set LogForwardRateLimit ($LogForwardRateLimit + 10);
$SendNotification2 ({ origin=$0; \
subject=([ $SymbolForNotification [ $IfThenElse ($Warning = true) "warning-sign" "memo" ] ] . \
"Log Forwarding"); \
message=("The log on " . $Identity . " contains " . [ $IfThenElse ($Count = 1) "this message" \
("these " . $Count . " messages") ] . " after " . [ /system/resource/get uptime ] . " uptime." . \
[ $IfThenElse ($Duplicates = true) (" Multi-repeated messages have been skipped.") ] . \
[ $IfThenElse ($LogForwardRateLimit > 30) ("\nRate limit in action, delaying forwarding.") ] . \
"\n" . $Messages) });
:set LogForwardLast ($MessageVal->".id");
} else={
:if ($LogForwardRateLimit > 0) do={
:set LogForwardRateLimit ($LogForwardRateLimit - 1);
}
}
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