From cb72eccc6cf66cab0412f7bd696aa079fffc5180 Mon Sep 17 00:00:00 2001
From: Christian Hesse <mail@eworm.de>
Date: Fri, 18 Dec 2020 10:11:18 +0100
Subject: [PATCH] ipv6-update: update interface specific address list entries

---
 doc/ipv6-update.md |  6 ++++++
 ipv6-update        | 12 ++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/doc/ipv6-update.md b/doc/ipv6-update.md
index 5295bd5..f736433 100644
--- a/doc/ipv6-update.md
+++ b/doc/ipv6-update.md
@@ -43,6 +43,12 @@ firewall rules, comment has to be "`ipv6-pool-`" and actual pool name:
 As this entry is mandatory it is created automatically if it does not exist,
 with the comment also set for list.
 
+Address list entries for specific interfaces can be updated as well. The
+interface needs to get its address from pool `isp` and the address list entry
+has to be associated to an interface in comment:
+
+    / ipv6 firewall address-list add address=2003:cf:2f0f:de01::/64 comment="ipv6-pool-isp, interface=br-local" list=local;
+
 Static DNS records need a special comment to be updated. Again it has to
 start with "`ipv6-pool-`" and actual pool name, followed by a comma,
 "`interface=`" and the name of interface this address is connected to:
diff --git a/ipv6-update b/ipv6-update
index 1baa0a4..2224a11 100644
--- a/ipv6-update
+++ b/ipv6-update
@@ -31,6 +31,18 @@
   # 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") ];
+
+    :local Address [ / ipv6 address find where from-pool=$Pool interface=($Comment->"interface") ];
+    :if ([ :len $Address ] = 1) do={
+      :set Address [ / ipv6 address get $Address address ];
+      :log info ("Updating IPv6 address list with new IPv6 prefix " . $Address . " from interface " . ($Comment->"interface"));
+      / ipv6 firewall address-list set address=$Address $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") ];