diff options
Diffstat (limited to 'ipsec-to-dns.rsc')
-rw-r--r-- | ipsec-to-dns.rsc | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/ipsec-to-dns.rsc b/ipsec-to-dns.rsc new file mode 100644 index 0000000..8894eee --- /dev/null +++ b/ipsec-to-dns.rsc @@ -0,0 +1,79 @@ +#!rsc by RouterOS +# RouterOS script: ipsec-to-dns +# Copyright (c) 2021-2024 Christian Hesse <mail@eworm.de> +# https://git.eworm.de/cgit/routeros-scripts/about/COPYING.md +# +# requires RouterOS, version=7.13 +# +# and add/remove/update DNS entries from IPSec mode-config +# https://git.eworm.de/cgit/routeros-scripts/about/doc/ipsec-to-dns.md + +:global GlobalFunctionsReady; +:while ($GlobalFunctionsReady != true) do={ :delay 500ms; } + +:do { + :local ScriptName [ :jobname ]; + + :global Domain; + :global HostNameInZone; + :global Identity; + :global PrefixInZone; + + :global CharacterReplace; + :global EscapeForRegEx; + :global IfThenElse; + :global LogPrint; + :global ScriptLock; + + :if ([ $ScriptLock $ScriptName ] = false) do={ + :error false; + } + + :local Zone \ + ([ $IfThenElse ($PrefixInZone = true) "ipsec." ] . \ + [ $IfThenElse ($HostNameInZone = true) ($Identity . ".") ] . $Domain); + :local Ttl 5m; + :local CommentPrefix ("managed by " . $ScriptName . " for "); + :local CommentString ("--- " . $ScriptName . " above ---"); + + :if ([ :len [ /ip/dns/static/find where (name=$CommentString or (comment=$CommentString and name=-)) type=NXDOMAIN disabled ] ] = 0) do={ + /ip/dns/static/add name=$CommentString type=NXDOMAIN disabled=yes; + $LogPrint warning $ScriptName ("Added disabled static dns record with name '" . $CommentString . "'."); + } + :local PlaceBefore ([ /ip/dns/static/find where (name=$CommentString or (comment=$CommentString and name=-)) type=NXDOMAIN disabled ]->0); + + :foreach DnsRecord in=[ /ip/dns/static/find where comment~("^" . $CommentPrefix) ] do={ + :local DnsRecordVal [ /ip/dns/static/get $DnsRecord ]; + :local PeerId [ $CharacterReplace ($DnsRecordVal->"comment") $CommentPrefix "" ]; + :if ([ :len [ /ip/ipsec/active-peers/find where id~("^(CN=)?" . [ $EscapeForRegEx $PeerId ] . "\$") \ + dynamic-address=($DnsRecordVal->"address") ] ] > 0) do={ + $LogPrint debug $ScriptName ("Peer " . $PeerId . " (" . $DnsRecordVal->"name" . ") still exists. Not deleting DNS entry."); + } else={ + :local Found false; + $LogPrint info $ScriptName ("Peer " . $PeerId . " (" . $DnsRecordVal->"name" . ") has gone, deleting DNS entry."); + /ip/dns/static/remove $DnsRecord; + } + } + + :foreach Peer in=[ /ip/ipsec/active-peers/find where !(dynamic-address=[]) ] do={ + :local PeerVal [ /ip/ipsec/active-peers/get $Peer ]; + :local PeerId [ $CharacterReplace ($PeerVal->"id") "CN=" "" ]; + :local Comment ($CommentPrefix . $PeerId); + :local HostName [ :pick $PeerId 0 [ :find ($PeerId . ".") "." ] ]; + + :local Fqdn ($HostName . "." . $Zone); + :local DnsRecord [ /ip/dns/static/find where name=$Fqdn ]; + :if ([ :len $DnsRecord ] > 0) do={ + :local DnsIp [ /ip/dns/static/get $DnsRecord address ]; + :if ($DnsIp = $PeerVal->"dynamic-address") do={ + $LogPrint debug $ScriptName ("DNS entry for " . $Fqdn . " does not need updating."); + } else={ + $LogPrint info $ScriptName ("Replacing DNS entry for " . $Fqdn . ", new address is " . $PeerVal->"dynamic-address" . "."); + /ip/dns/static/set name=$Fqdn address=($PeerVal->"dynamic-address") ttl=$Ttl comment=$Comment $DnsRecord; + } + } else={ + $LogPrint info $ScriptName ("Adding new DNS entry for " . $Fqdn . ", address is " . $PeerVal->"dynamic-address" . "."); + /ip/dns/static/add name=$Fqdn address=($PeerVal->"dynamic-address") ttl=$Ttl comment=$Comment place-before=$PlaceBefore; + } + } +} on-error={ } |