From d6ea66ccd3e2d943808cf001574b3cf979f6231c Mon Sep 17 00:00:00 2001
From: Christian Hesse <mail@eworm.de>
Date: Mon, 4 Mar 2024 13:48:01 +0100
Subject: ipv6-update: move code into function

---
 ipv6-update.rsc | 106 +++++++++++++++++++++++++++++---------------------------
 1 file changed, 55 insertions(+), 51 deletions(-)

diff --git a/ipv6-update.rsc b/ipv6-update.rsc
index 1d7207b..350fc4b 100644
--- a/ipv6-update.rsc
+++ b/ipv6-update.rsc
@@ -8,74 +8,78 @@
 # update firewall and dns settings on IPv6 prefix change
 # https://git.eworm.de/cgit/routeros-scripts/about/doc/ipv6-update.md
 
-:local 0 [ :jobname ];
 :global GlobalFunctionsReady;
 :while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
 
-:local PdPrefix $"pd-prefix";
+:local Main do={
+  :local ScriptName [ :tostr $1 ];
+  :local PdPrefix            $2;
 
-:global LogPrintExit2;
-:global ParseKeyValueStore;
-:global ScriptLock;
+  :global LogPrintExit2;
+  :global ParseKeyValueStore;
+  :global ScriptLock;
 
-$ScriptLock $0;
+  $ScriptLock $ScriptName;
 
-:if ([ :typeof $PdPrefix ] = "nothing") do={
-  $LogPrintExit2 error $0 ("This script is supposed to run from ipv6 dhcp-client.") true;
-}
+  :if ([ :typeof $PdPrefix ] = "nothing") do={
+    $LogPrintExit2 error $ScriptName ("This script is supposed to run from ipv6 dhcp-client.") true;
+  }
 
-:local Pool [ /ipv6/pool/get [ find where prefix=$PdPrefix ] name ];
-:if ([ :len [ /ipv6/firewall/address-list/find where comment=("ipv6-pool-" . $Pool) ] ] = 0) do={
-  /ipv6/firewall/address-list/add list=("ipv6-pool-" . $Pool) address=:: comment=("ipv6-pool-" . $Pool);
-  $LogPrintExit2 warning $0 ("Added ipv6 address list entry for ipv6-pool-" . $Pool) false;
-}
-:local AddrList [ /ipv6/firewall/address-list/find where comment=("ipv6-pool-" . $Pool) ];
-:local OldPrefix [ /ipv6/firewall/address-list/get ($AddrList->0) address ];
+  :local Pool [ /ipv6/pool/get [ find where prefix=$PdPrefix ] name ];
+  :if ([ :len [ /ipv6/firewall/address-list/find where comment=("ipv6-pool-" . $Pool) ] ] = 0) do={
+    /ipv6/firewall/address-list/add list=("ipv6-pool-" . $Pool) address=:: comment=("ipv6-pool-" . $Pool);
+    $LogPrintExit2 warning $ScriptName ("Added ipv6 address list entry for ipv6-pool-" . $Pool) false;
+  }
+  :local AddrList [ /ipv6/firewall/address-list/find where comment=("ipv6-pool-" . $Pool) ];
+  :local OldPrefix [ /ipv6/firewall/address-list/get ($AddrList->0) address ];
 
-:if ($OldPrefix != $PdPrefix) do={
-  $LogPrintExit2 info $0 ("Updating IPv6 address list with new IPv6 prefix " . $PdPrefix) false;
-  /ipv6/firewall/address-list/set address=$PdPrefix $AddrList;
+  :if ($OldPrefix != $PdPrefix) do={
+    $LogPrintExit2 info $ScriptName ("Updating IPv6 address list with new IPv6 prefix " . $PdPrefix) false;
+    /ipv6/firewall/address-list/set address=$PdPrefix $AddrList;
 
-  # give the interfaces a moment to receive their addresses
-  :delay 2s;
+    # give the interfaces a moment to receive their addresses
+    :delay 2s;
 
-  :foreach ListEntry in=[ /ipv6/firewall/address-list/find where comment~("^ipv6-pool-" . $Pool . ",") ] do={
-    :local ListEntryVal [ /ipv6/firewall/address-list/get $ListEntry ];
-    :local Comment [ $ParseKeyValueStore ($ListEntryVal->"comment") ];
+    :foreach ListEntry in=[ /ipv6/firewall/address-list/find where comment~("^ipv6-pool-" . $Pool . ",") ] do={
+      :local ListEntryVal [ /ipv6/firewall/address-list/get $ListEntry ];
+      :local Comment [ $ParseKeyValueStore ($ListEntryVal->"comment") ];
 
-    :local Prefix [ /ipv6/address/find where from-pool=$Pool interface=($Comment->"interface") global ];
-    :if ([ :len $Prefix ] = 1) do={
-      :set Prefix [ /ipv6/address/get $Prefix address ];
+      :local Prefix [ /ipv6/address/find where from-pool=$Pool interface=($Comment->"interface") global ];
+      :if ([ :len $Prefix ] = 1) do={
+        :set Prefix [ /ipv6/address/get $Prefix address ];
 
-      :if ([ :typeof [ :find ($ListEntryVal->"address") "/128" ] ] = "num" ) do={
-        :set Prefix ([ :toip6 [ :pick $Prefix 0 [ :find $Prefix "/64" ] ] ] & ffff:ffff:ffff:ffff::);
-        :local Address ($ListEntryVal->"address");
-        :local Address ($Prefix | ([ :toip6 [ :pick $Address 0 [ :find $Address "/128" ] ] ] & ::ffff:ffff:ffff:ffff));
-
-        $LogPrintExit2 info $0 ("Updating IPv6 address list with new IPv6 host address " . $Address . \
-          " from interface " . ($Comment->"interface")) false;
-        /ipv6/firewall/address-list/set address=$Address $ListEntry;
-      } else={
-        $LogPrintExit2 info $0 ("Updating IPv6 address list with new IPv6 prefix " . $Prefix . \
-          " from interface " . ($Comment->"interface")) false;
-        /ipv6/firewall/address-list/set address=$Prefix $ListEntry;
+        :if ([ :typeof [ :find ($ListEntryVal->"address") "/128" ] ] = "num" ) do={
+          :set Prefix ([ :toip6 [ :pick $Prefix 0 [ :find $Prefix "/64" ] ] ] & ffff:ffff:ffff:ffff::);
+          :local Address ($ListEntryVal->"address");
+          :local Address ($Prefix | ([ :toip6 [ :pick $Address 0 [ :find $Address "/128" ] ] ] & ::ffff:ffff:ffff:ffff));
+
+          $LogPrintExit2 info $ScriptName ("Updating IPv6 address list with new IPv6 host address " . $Address . \
+            " from interface " . ($Comment->"interface")) false;
+          /ipv6/firewall/address-list/set address=$Address $ListEntry;
+        } else={
+          $LogPrintExit2 info $ScriptName ("Updating IPv6 address list with new IPv6 prefix " . $Prefix . \
+            " from interface " . ($Comment->"interface")) false;
+          /ipv6/firewall/address-list/set address=$Prefix $ListEntry;
+        }
       }
     }
-  }
 
-  :foreach Record in=[ /ip/dns/static/find where comment~("^ipv6-pool-" . $Pool . ",") ] do={
-    :local RecordVal [ /ip/dns/static/get $Record ];
-    :local Comment [ $ParseKeyValueStore ($RecordVal->"comment") ];
+    :foreach Record in=[ /ip/dns/static/find where comment~("^ipv6-pool-" . $Pool . ",") ] do={
+      :local RecordVal [ /ip/dns/static/get $Record ];
+      :local Comment [ $ParseKeyValueStore ($RecordVal->"comment") ];
 
-    :local Prefix [ /ipv6/address/find where from-pool=$Pool interface=($Comment->"interface") global ];
-    :if ([ :len $Prefix ] = 1) do={
-      :set Prefix [ /ipv6/address/get $Prefix address ];
-      :set Prefix ([ :toip6 [ :pick $Prefix 0 [ :find $Prefix "/64" ] ] ] & ffff:ffff:ffff:ffff::);
-      :local Address ($Prefix | ([ :toip6 ($RecordVal->"address") ] & ::ffff:ffff:ffff:ffff));
+      :local Prefix [ /ipv6/address/find where from-pool=$Pool interface=($Comment->"interface") global ];
+      :if ([ :len $Prefix ] = 1) do={
+        :set Prefix [ /ipv6/address/get $Prefix address ];
+        :set Prefix ([ :toip6 [ :pick $Prefix 0 [ :find $Prefix "/64" ] ] ] & ffff:ffff:ffff:ffff::);
+        :local Address ($Prefix | ([ :toip6 ($RecordVal->"address") ] & ::ffff:ffff:ffff:ffff));
 
-      $LogPrintExit2 info $0 ("Updating DNS record for " . ($RecordVal->"name") . \
-        ($RecordVal->"regexp") . " to " . $Address) false;
-      /ip/dns/static/set address=$Address $Record;
+        $LogPrintExit2 info $ScriptName ("Updating DNS record for " . ($RecordVal->"name") . \
+          ($RecordVal->"regexp") . " to " . $Address) false;
+        /ip/dns/static/set address=$Address $Record;
+      }
     }
   }
 }
+
+$Main [ :jobname ] $"pd-prefix";
-- 
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