From 6a8306598218824ef48d302f6095ae8e854bdd95 Mon Sep 17 00:00:00 2001
From: Sander Klein <github@roedie.nl>
Date: Sat, 17 Dec 2022 18:06:44 +0100
Subject: T4809: radvd: Allow the use of AdvRASrcAddress

This add the AdvRASrcAddress configuration option to configure
a source address for the router advertisements. The source
address still must be configured on the system. This is useful
for VRRP setups where you want fe80::1 on the VRRP interface
for cleaner VRRP failovers.
---
 data/templates/router-advert/radvd.conf.tmpl       |  7 +++++++
 interface-definitions/service_router-advert.xml.in | 13 +++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/data/templates/router-advert/radvd.conf.tmpl b/data/templates/router-advert/radvd.conf.tmpl
index 88d066491..17869e318 100644
--- a/data/templates/router-advert/radvd.conf.tmpl
+++ b/data/templates/router-advert/radvd.conf.tmpl
@@ -43,6 +43,13 @@ interface {{ iface }} {
     };
 {%       endfor %}
 {%     endif %}
+{%         if iface_config.source_address is defined %}
+    AdvRASrcAddress {
+{%             for source_address in iface_config.source_address %}
+        {{ source_address }}
+{%             endfor %}
+    };
+{%         endif %}
 {%     if iface_config.prefix is defined and iface_config.prefix is not none %}
 {%       for prefix, prefix_options in iface_config.prefix.items() %}
     prefix {{ prefix }} {
diff --git a/interface-definitions/service_router-advert.xml.in b/interface-definitions/service_router-advert.xml.in
index 0f4009f5c..a15ce8b8f 100644
--- a/interface-definitions/service_router-advert.xml.in
+++ b/interface-definitions/service_router-advert.xml.in
@@ -276,6 +276,19 @@
                   </leafNode>
                 </children>
               </tagNode>
+              <leafNode name="source-address">
+                <properties>
+                  <help>Use IPv6 address as source address. Useful with VRRP.</help>
+                  <valueHelp>
+                    <format>ipv6</format>
+                    <description>IPv6 address to be advertized (must be configured on interface)</description>
+                  </valueHelp>
+                  <constraint>
+                    <validator name="ipv6-address"/>
+                  </constraint>
+                  <multi/>
+                </properties>
+              </leafNode>
               <leafNode name="reachable-time">
                 <properties>
                   <help>Time, in milliseconds, that a node assumes a neighbor is reachable after having received a reachability confirmation</help>
-- 
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