routeros-scripts/update-tunnelbroker

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#!rsc by RouterOS
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# RouterOS script: update-tunnelbroker
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# Copyright (c) 2013-2021 Christian Hesse <mail@eworm.de>
# Michael Gisbers <michael@gisbers.de>
# https://git.eworm.de/cgit/routeros-scripts/about/COPYING.md
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#
# update local address of tunnelbroker interface
# https://git.eworm.de/cgit/routeros-scripts/about/doc/update-tunnelbroker.md
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:global GlobalFunctionsReady;
:while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
:global CertificateAvailable;
:global LogPrintExit;
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:global ParseKeyValueStore;
:if ([ / ip cloud get ddns-enabled ] != true) do={
$LogPrintExit error "IP cloud DDNS is not enabled." true;
}
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# Get the current ip address from cloud
/ ip cloud force-update;
global: variable names are CamelCase ___ _ ___ __ / _ )(_)__ _ / _/__ _/ /_ / _ / / _ `/ / _/ _ `/ __/ /____/_/\_, / /_/ \_,_/\__/ _ __ /___/ _ __ | | / /___ __________ (_)___ ____ _/ / | | /| / / __ `/ ___/ __ \/ / __ \/ __ `/ / | |/ |/ / /_/ / / / / / / / / / / /_/ /_/ |__/|__/\__,_/_/ /_/ /_/_/_/ /_/\__, (_) /____/ RouterOS has some odd behavior when it comes to variable names. Let's have a look at the interfaces: [admin@MikroTik] > / interface print where name=en1 Flags: D - dynamic, X - disabled, R - running, S - slave # NAME TYPE ACTUAL-MTU L2MTU 0 RS en1 ether 1500 1598 That looks ok. Now we use a script: { :local interface "en1"; / interface print where name=$interface; } And the result... [admin@MikroTik] > { :local interface "en1"; {... / interface print where name=$interface; } Flags: D - dynamic, X - disabled, R - running, S - slave # NAME TYPE ACTUAL-MTU L2MTU 0 RS en1 ether 1500 1598 ... still looks ok. We make a little modification to the script: { :local name "en1"; / interface print where name=$name; } And the result: [admin@MikroTik] > { :local name "en1"; {... / interface print where name=$name; } Flags: D - dynamic, X - disabled, R - running, S - slave # NAME TYPE ACTUAL-MTU L2MTU 0 RS en1 ether 1500 1598 1 S en2 ether 1500 1598 2 S en3 ether 1500 1598 3 S en4 ether 1500 1598 4 S en5 ether 1500 1598 5 R br-local bridge 1500 1598 Ups! The filter has no effect! That happens whenever the variable name ($name) matches the property name (name=). And another modification: { :local type "en1"; / interface print where name=$type; } And the result: [admin@MikroTik] > { :local type "en1"; {... / interface print where name=$type; } Flags: D - dynamic, X - disabled, R - running, S - slave # NAME TYPE ACTUAL-MTU L2MTU Ups! Nothing? Even if the variable name ($type) matches whatever property name (type=) things go wrong. The answer from MikroTik support (in Ticket#2019010222000454): > This is how scripting works in RouterOS and we will not fix it. To get around this we use variable names in CamelCase. Let's hope Mikrotik never ever introduces property names in CamelCase... *fingers crossed*
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:while ([ / ip cloud get status ] != "updated") do={
:delay 1s;
}
:local PublicAddress [ / ip cloud get public-address ];
:foreach Interface in=[ / interface 6to4 find where comment~"^tunnelbroker" !disabled ] do={
:local InterfaceVal [ / interface 6to4 get $Interface ];
:if ($PublicAddress != $InterfaceVal->"local-address") do={
:local Comment [ $ParseKeyValueStore ($InterfaceVal->"comment") ];
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:if ([ $CertificateAvailable "Starfield Secure Certificate Authority - G2" ] = false) do={
$LogPrintExit error ("Downloading required certificate failed.") true;
}
$LogPrintExit info ("Local address changed, sending UPDATE to tunnelbroker! New address: " . $PublicAddress) false;
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/ tool fetch check-certificate=yes-without-crl \
("https://ipv4.tunnelbroker.net/nic/update\?hostname=" . $Comment->"id") \
user=($Comment->"user") password=($Comment->"pass") output=none;
/ interface 6to4 set $Interface local-address=$PublicAddress;
} else={
$LogPrintExit debug ("All tunnelbroker configuration is up to date for interface " . $InterfaceVal->"name" . ".") false;
}
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}