From 6234be3509274f85c09d30a787c9f0de27ca81f4 Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Tue, 26 May 2020 22:01:44 +0200
Subject: pppoe: T2502: configure IPv6 default routes if required

---
 data/templates/pppoe/ipv6-up.script.tmpl | 41 ++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

(limited to 'data/templates/pppoe')

diff --git a/data/templates/pppoe/ipv6-up.script.tmpl b/data/templates/pppoe/ipv6-up.script.tmpl
index 9bf6db5cc..097f1d4c3 100644
--- a/data/templates/pppoe/ipv6-up.script.tmpl
+++ b/data/templates/pppoe/ipv6-up.script.tmpl
@@ -7,6 +7,8 @@ if [ "$6" != "{{ intf }}" ]; then
     exit
 fi
 
+set -x
+
 {% if ipv6_autoconf -%}
 # add some info to syslog
 DIALER_PID=$(cat /var/run/{{ intf }}.pid)
@@ -44,3 +46,42 @@ echo 1 > /proc/sys/net/ipv6/conf/{{ intf }}/autoconf
 # Start wide dhcpv6 client
 systemctl start dhcp6c@{{ intf }}.service
 {% endif %}
+
+
+{%   if default_route != 'none' -%}
+# See https://phabricator.vyos.net/T2248 & T2220. Determine if we are enslaved
+# to a VRF, this is needed to properly insert the default route.
+
+SED_OPT="^ipv6 route"
+VRF_NAME=""
+if [ -d /sys/class/net/{{ intf }}/upper_* ]; then
+    # Determine upper (VRF) interface
+    VRF=$(basename $(ls -d /sys/class/net/{{ intf }}/upper_*))
+    # Remove upper_ prefix from result string
+    VRF=${VRF#"upper_"}
+    # generate new SED command
+    SED_OPT="vrf ${VRF}"
+    # generate vtysh option
+    VRF_NAME="vrf ${VRF}"
+fi
+
+{%     if default_route == 'auto' -%}
+# Only insert a new default route if there is no default route configured
+routes=$(vtysh -c "show running-config" | sed -n "/${SED_OPT}/,/!/p" | grep ::/0 | wc -l)
+if [ "$routes" -ne 0 ]; then
+    exit 1
+fi
+
+{%     elif default_route == 'force' -%}
+# Retrieve current static default routes and remove it from the routing table
+vtysh -c "show running-config" | sed -n "/${SED_OPT}/,/!/p" | grep ::/0 | while read route ; do
+    vtysh -c "conf t" ${VTY_OPT} -c "no ${route} ${VRF_NAME}"
+done
+{%     endif %}
+
+# Add default route to default or VRF routing table
+vtysh -c "conf t" ${VTY_OPT} -c "ipv6 route ::/0 {{ intf }} ${VRF_NAME}"
+logger -t pppd[$DIALER_PID] "added default route via {{ intf }} ${VRF_NAME}"
+{%   endif %}
+
+
-- 
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