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dhcp-to-dns: move code into function

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Christian Hesse 2024-03-04 13:48:01 +01:00
parent 82ec11f2fc
commit 29f544d18d
1 changed files with 93 additions and 88 deletions
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71
dhcp-to-dns.rsc
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@ -9,58 +9,60 @@
# check DHCP leases and add/remove/update DNS entries # check DHCP leases and add/remove/update DNS entries
# https://git.eworm.de/cgit/routeros-scripts/about/doc/dhcp-to-dns.md # https://git.eworm.de/cgit/routeros-scripts/about/doc/dhcp-to-dns.md
:local 0 [ :jobname ];
:global GlobalFunctionsReady; :global GlobalFunctionsReady;
:while ($GlobalFunctionsReady != true) do={ :delay 500ms; } :while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
:global Domain; :local Main do={
:global Identity; :local ScriptName [ :tostr $1 ];
:global CleanName; :global Domain;
:global EitherOr; :global Identity;
:global IfThenElse;
:global LogPrintExit2;
:global LogPrintOnce;
:global ParseKeyValueStore;
:global ScriptLock;
$ScriptLock $0 false 10; :global CleanName;
:global EitherOr;
:global IfThenElse;
:global LogPrintExit2;
:global LogPrintOnce;
:global ParseKeyValueStore;
:global ScriptLock;
:local Ttl 5m; $ScriptLock $ScriptName false 10;
:local CommentPrefix ("managed by " . $0);
:local CommentString ("--- " . $0 . " above ---");
:if ([ :len [ /ip/dns/static/find where (name=$CommentString or (comment=$CommentString and name=-)) type=NXDOMAIN disabled ] ] = 0) do={ :local Ttl 5m;
:local CommentPrefix ("managed by " . $ScriptName);
: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; /ip/dns/static/add name=$CommentString type=NXDOMAIN disabled=yes;
$LogPrintExit2 warning $0 ("Added disabled static dns record with name '" . $CommentString . "'.") false; $LogPrintExit2 warning $ScriptName ("Added disabled static dns record with name '" . $CommentString . "'.") false;
} }
:local PlaceBefore ([ /ip/dns/static/find where (name=$CommentString or (comment=$CommentString and name=-)) type=NXDOMAIN disabled ]->0); :local PlaceBefore ([ /ip/dns/static/find where (name=$CommentString or (comment=$CommentString and name=-)) type=NXDOMAIN disabled ]->0);
:foreach DnsRecord in=[ /ip/dns/static/find where comment~("^" . $CommentPrefix . "\\b") (!type or type=A) ] do={ :foreach DnsRecord in=[ /ip/dns/static/find where comment~("^" . $CommentPrefix . "\\b") (!type or type=A) ] do={
:local DnsRecordVal [ /ip/dns/static/get $DnsRecord ]; :local DnsRecordVal [ /ip/dns/static/get $DnsRecord ];
:local DnsRecordInfo [ $ParseKeyValueStore ($DnsRecordVal->"comment") ]; :local DnsRecordInfo [ $ParseKeyValueStore ($DnsRecordVal->"comment") ];
:local MacInServer ($DnsRecordInfo->"macaddress" . " in " . $DnsRecordInfo->"server"); :local MacInServer ($DnsRecordInfo->"macaddress" . " in " . $DnsRecordInfo->"server");
:if ([ :len [ /ip/dhcp-server/lease/find where active-mac-address=($DnsRecordInfo->"macaddress") \ :if ([ :len [ /ip/dhcp-server/lease/find where active-mac-address=($DnsRecordInfo->"macaddress") \
active-address=($DnsRecordVal->"address") server=($DnsRecordInfo->"server") status=bound ] ] > 0) do={ active-address=($DnsRecordVal->"address") server=($DnsRecordInfo->"server") status=bound ] ] > 0) do={
$LogPrintExit2 debug $0 ("Lease for " . $MacInServer . " (" . $DnsRecordVal->"name" . ") still exists. Not deleting record.") false; $LogPrintExit2 debug $ScriptName ("Lease for " . $MacInServer . " (" . $DnsRecordVal->"name" . ") still exists. Not deleting record.") false;
} else={ } else={
:local Found false; :local Found false;
$LogPrintExit2 info $0 ("Lease expired for " . $MacInServer . ", deleting record (" . $DnsRecordVal->"name" . ").") false; $LogPrintExit2 info $ScriptName ("Lease expired for " . $MacInServer . ", deleting record (" . $DnsRecordVal->"name" . ").") false;
/ip/dns/static/remove $DnsRecord; /ip/dns/static/remove $DnsRecord;
/ip/dns/static/remove [ find where type=CNAME comment=($DnsRecordVal->"comment") ]; /ip/dns/static/remove [ find where type=CNAME comment=($DnsRecordVal->"comment") ];
} }
} }
:foreach Lease in=[ /ip/dhcp-server/lease/find where status=bound ] do={ :foreach Lease in=[ /ip/dhcp-server/lease/find where status=bound ] do={
:local LeaseVal; :local LeaseVal;
:do { :do {
:set LeaseVal [ /ip/dhcp-server/lease/get $Lease ]; :set LeaseVal [ /ip/dhcp-server/lease/get $Lease ];
:if ([ :len [ /ip/dhcp-server/lease/find where active-mac-address=($LeaseVal->"active-mac-address") status=bound ] ] > 1) do={ :if ([ :len [ /ip/dhcp-server/lease/find where active-mac-address=($LeaseVal->"active-mac-address") status=bound ] ] > 1) do={
$LogPrintOnce info $0 ("Multiple bound leases found for mac-address " . ($LeaseVal->"active-mac-address") . "!") false; $LogPrintOnce info $ScriptName ("Multiple bound leases found for mac-address " . ($LeaseVal->"active-mac-address") . "!") false;
} }
} on-error={ } on-error={
$LogPrintExit2 debug $0 ("A lease just vanished, ignoring.") false; $LogPrintExit2 debug $ScriptName ("A lease just vanished, ignoring.") false;
} }
:if ([ :len ($LeaseVal->"active-address") ] > 0) do={ :if ([ :len ($LeaseVal->"active-address") ] > 0) do={
@ -84,9 +86,9 @@ $ScriptLock $0 false 10;
:local DnsRecordVal [ /ip/dns/static/get $DnsRecord ]; :local DnsRecordVal [ /ip/dns/static/get $DnsRecord ];
:if ($DnsRecordVal->"address" = $LeaseVal->"active-address" && $DnsRecordVal->"name" = $FullA) do={ :if ($DnsRecordVal->"address" = $LeaseVal->"active-address" && $DnsRecordVal->"name" = $FullA) do={
$LogPrintExit2 debug $0 ("The A record for " . $MacInServer . " (" . $FullA . ") does not need updating.") false; $LogPrintExit2 debug $ScriptName ("The A record for " . $MacInServer . " (" . $FullA . ") does not need updating.") false;
} else={ } else={
$LogPrintExit2 info $0 ("Updating A record for " . $MacInServer . " (" . $FullA . " -> " . $LeaseVal->"active-address" . ").") false; $LogPrintExit2 info $ScriptName ("Updating A record for " . $MacInServer . " (" . $FullA . " -> " . $LeaseVal->"active-address" . ").") false;
/ip/dns/static/set address=($LeaseVal->"active-address") name=$FullA $DnsRecord; /ip/dns/static/set address=($LeaseVal->"active-address") name=$FullA $DnsRecord;
} }
@ -94,28 +96,31 @@ $ScriptLock $0 false 10;
:if ([ :len $CName ] > 0) do={ :if ([ :len $CName ] > 0) do={
:local CNameVal [ /ip/dns/static/get $CName ]; :local CNameVal [ /ip/dns/static/get $CName ];
:if ($CNameVal->"name" != $FullCN || $CNameVal->"cname" != $FullA) do={ :if ($CNameVal->"name" != $FullCN || $CNameVal->"cname" != $FullA) do={
$LogPrintExit2 info $0 ("Deleting CNAME record with wrong data for " . $MacInServer . ".") false; $LogPrintExit2 info $ScriptName ("Deleting CNAME record with wrong data for " . $MacInServer . ".") false;
/ip/dns/static/remove $CName; /ip/dns/static/remove $CName;
} }
} }
:if ([ :len $HostName ] > 0 && [ :len [ /ip/dns/static/find where name=$FullCN type=CNAME ] ] = 0) do={ :if ([ :len $HostName ] > 0 && [ :len [ /ip/dns/static/find where name=$FullCN type=CNAME ] ] = 0) do={
$LogPrintExit2 info $0 ("Adding CNAME record for " . $MacInServer . " (" . $FullCN . " -> " . $FullA . ").") false; $LogPrintExit2 info $ScriptName ("Adding CNAME record for " . $MacInServer . " (" . $FullCN . " -> " . $FullA . ").") false;
/ip/dns/static/add name=$FullCN type=CNAME cname=$FullA ttl=$Ttl comment=$Comment place-before=$PlaceBefore; /ip/dns/static/add name=$FullCN type=CNAME cname=$FullA ttl=$Ttl comment=$Comment place-before=$PlaceBefore;
} }
} else={ } else={
$LogPrintExit2 info $0 ("Adding A record for " . $MacInServer . " (" . $FullA . " -> " . $LeaseVal->"active-address" . ").") false; $LogPrintExit2 info $ScriptName ("Adding A record for " . $MacInServer . " (" . $FullA . " -> " . $LeaseVal->"active-address" . ").") false;
/ip/dns/static/add name=$FullA type=A address=($LeaseVal->"active-address") ttl=$Ttl comment=$Comment place-before=$PlaceBefore; /ip/dns/static/add name=$FullA type=A address=($LeaseVal->"active-address") ttl=$Ttl comment=$Comment place-before=$PlaceBefore;
:if ([ :len $HostName ] > 0 && [ :len [ /ip/dns/static/find where name=$FullCN type=CNAME ] ] = 0) do={ :if ([ :len $HostName ] > 0 && [ :len [ /ip/dns/static/find where name=$FullCN type=CNAME ] ] = 0) do={
$LogPrintExit2 info $0 ("Adding CNAME record for " . $MacInServer . " (" . $FullCN . " -> " . $FullA . ").") false; $LogPrintExit2 info $ScriptName ("Adding CNAME record for " . $MacInServer . " (" . $FullCN . " -> " . $FullA . ").") false;
/ip/dns/static/add name=$FullCN type=CNAME cname=$FullA ttl=$Ttl comment=$Comment place-before=$PlaceBefore; /ip/dns/static/add name=$FullCN type=CNAME cname=$FullA ttl=$Ttl comment=$Comment place-before=$PlaceBefore;
} }
} }
:if ([ :len [ /ip/dns/static/find where name=$FullA (!type or type=A) ] ] > 1) do={ :if ([ :len [ /ip/dns/static/find where name=$FullA (!type or type=A) ] ] > 1) do={
$LogPrintOnce warning $0 ("The name '" . $FullA . "' appeared in more than one A record!") false; $LogPrintOnce warning $ScriptName ("The name '" . $FullA . "' appeared in more than one A record!") false;
} }
} else={ } else={
$LogPrintExit2 debug $0 ("No address available... Ignoring.") false; $LogPrintExit2 debug $ScriptName ("No address available... Ignoring.") false;
}
} }
} }
$Main [ :jobname ];