From 0bf8c55386f0c3d684089c8bdc93e762fe7f7122 Mon Sep 17 00:00:00 2001
From: Viacheslav Hletenko <v.gletenko@vyos.io>
Date: Fri, 25 Aug 2023 10:09:30 +0000
Subject: T3546: PPPoE-server add extended scripts for RADIUS attributes

Ability to get and parse RADIUS attributes via a shell script and
then execute commands
Ane of the usecases is to create a custom shaper with some smart

Extended scripts receive from PPPoE daemon the following variables:

$1 - Interface name
$4 - Tunnel GW IP address
$5 - Delegated IP address to the client
$6 - Calling Station ID (MAC)

if [ -f /run/accel-pppd/radattr.$1 ]; then
    true
fi
---
 data/templates/accel-ppp/pppoe.config.tmpl        | 14 ++++++++
 interface-definitions/service_pppoe-server.xml.in | 39 +++++++++++++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/data/templates/accel-ppp/pppoe.config.tmpl b/data/templates/accel-ppp/pppoe.config.tmpl
index b37004f5b..3e5c64eb8 100644
--- a/data/templates/accel-ppp/pppoe.config.tmpl
+++ b/data/templates/accel-ppp/pppoe.config.tmpl
@@ -17,6 +17,10 @@ net-snmp
 {% if limits is defined %}
 connlimit
 {% endif %}
+{% if extended_scripts is defined %}
+sigchld
+pppd_compat
+{% endif %}
 
 [core]
 thread-count={{ thread_count }}
@@ -167,5 +171,15 @@ timeout={{ limits.timeout }}
 {# Common RADIUS shaper configuration #}
 {% include 'accel-ppp/config_shaper_radius.j2' %}
 
+{% if extended_scripts is defined %}
+[pppd-compat]
+verbose=1
+radattr-prefix=/run/accel-pppd/radattr
+{% set script_name = {'on_up': 'ip-up', 'on_down': 'ip-down', 'on_change':'ip-change', 'on_pre_up':'ip-pre-up'} %}
+{%   for script in extended_scripts %}
+{{ script_name[script] }}={{ extended_scripts[script] }}
+{%   endfor %}
+{% endif %}
+
 [cli]
 tcp=127.0.0.1:2001
diff --git a/interface-definitions/service_pppoe-server.xml.in b/interface-definitions/service_pppoe-server.xml.in
index 65868226b..876aadcf7 100644
--- a/interface-definitions/service_pppoe-server.xml.in
+++ b/interface-definitions/service_pppoe-server.xml.in
@@ -340,6 +340,45 @@
               </leafNode>
             </children>
           </node>
+          <node name="extended-scripts">
+            <properties>
+              <help>Extended script execution</help>
+            </properties>
+            <children>
+              <leafNode name="on-pre-up">
+                <properties>
+                  <help>Script to run before PPPoE session interface comes up</help>
+                    <constraint>
+                      <validator name="script"/>
+                    </constraint>
+                </properties>
+              </leafNode>
+              <leafNode name="on-up">
+                <properties>
+                  <help>Script to run when PPPoE session interface is completely configured and started</help>
+                    <constraint>
+                      <validator name="script"/>
+                    </constraint>
+                </properties>
+              </leafNode>
+              <leafNode name="on-down">
+                <properties>
+                  <help>Script to run when PPPoE session interface going to terminate</help>
+                    <constraint>
+                      <validator name="script"/>
+                    </constraint>
+                </properties>
+              </leafNode>
+              <leafNode name="on-change">
+                <properties>
+                  <help>Script to run when PPPoE session interface changed by RADIUS CoA handling</help>
+                    <constraint>
+                      <validator name="script"/>
+                    </constraint>
+                </properties>
+              </leafNode>
+            </children>
+          </node>
         </children>
       </node>
     </children>
-- 
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