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/ _ )(_)__ _ / _/__ _/ /_
/ _ / / _ `/ / _/ _ `/ __/
/____/_/\_, / /_/ \_,_/\__/
_ __ /___/ _ __
| | / /___ __________ (_)___ ____ _/ /
| | /| / / __ `/ ___/ __ \/ / __ \/ __ `/ /
| |/ |/ / /_/ / / / / / / / / / / /_/ /_/
|__/|__/\__,_/_/ /_/ /_/_/_/ /_/\__, (_)
/____/
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*
37 lines
1.4 KiB
Plaintext
37 lines
1.4 KiB
Plaintext
#!rsc
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# RouterOS script: ipv6-update
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# Copyright (c) 2013-2019 Christian Hesse <mail@eworm.de>
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#
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# update firewall and dns settings on IPv6 prefix change
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:local PdPrefix $"pd-prefix";
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:local Pool [ / ipv6 pool get [ find where prefix=$PdPrefix ] name ];
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:local AddrList [ / ipv6 firewall address-list find where comment=("ipv6-pool-" . $Pool) ];
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:local OldPrefix [ / ipv6 firewall address-list get $AddrList address ];
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# give the interfaces a moment to receive their addresses
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:delay 2s;
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if ($OldPrefix != $PdPrefix) do={
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:log info ("Updating IPv6 address list with new IPv6 prefix " . $PdPrefix);
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/ ipv6 firewall address-list set address=$PdPrefix $AddrList;
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:foreach Record in=[ / ip dns static find where comment~("ipv6-pool-" . $Pool) ] do={
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:local Comment [ :toarray [ / ip dns static get $Record comment ] ];
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:local IntName [ :pick [ :pick $Comment 1 ] 10 99 ];
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:local Suffix [ :pick [ :pick $Comment 2 ] 7 99 ];
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:local Prefix [ / ipv6 address get [ find where interface=$IntName from-pool=$Pool global ] address ];
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:local Prefix64 [ :pick $Prefix 0 [ :find $Prefix "::/64" ] ];
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:local Name [ / ip dns static get $Record name ];
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:if ([ :len $Name ] = 0) do={
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:set Name [ / ip dns static get $Record regex ];
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}
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:log info ("Updating DNS record for " . $Name . " to " . $Prefix64 . ":" . $Suffix);
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/ ip dns static set address=($Prefix64 . ":" . $Suffix) $Record;
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}
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}
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