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authorChristian Poessinger <christian@poessinger.com>2020-04-04 13:46:38 +0200
committerChristian Poessinger <christian@poessinger.com>2020-04-04 13:46:38 +0200
commit8dcf042a7f58dfac590b28174dc1d9b87ce5a893 (patch)
tree74acfbd69639855780f9b4608d36c48002434230 /data/templates/pppoe/ip-up.script.tmpl
parent926eaabc283dabc1b2db0bafbb41bc71f9766f05 (diff)
downloadvyos-1x-8dcf042a7f58dfac590b28174dc1d9b87ce5a893.tar.gz
vyos-1x-8dcf042a7f58dfac590b28174dc1d9b87ce5a893.zip
pppoe: T2219: move adding of default route to ip-(up|down) script
As PPPoE interfaces should be part of a VRF it is required that the default can also be set into the specified VRF. The default way of PPP by setting the "defaultroute" option does not take a VRF into account. In this case PPP installs a Kernel route forwarding all default traffic over this interface. This change installs a static route with metric 1 instead into the routing table via FRR. This is not the same as a Kernel route in terms of metric 1 compared to 0 but it should do the trick.
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diff --git a/data/templates/pppoe/ip-up.script.tmpl b/data/templates/pppoe/ip-up.script.tmpl
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+++ b/data/templates/pppoe/ip-up.script.tmpl
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+#!/bin/sh
+
+# As PPPoE is an "on demand" interface we need to re-configure it when it
+# becomes up
+if [ "$6" != "{{ intf }}" ]; then
+ exit
+fi
+
+# add some info to syslog
+DIALER_PID=$(cat /var/run/{{ intf }}.pid)
+logger -t pppd[$DIALER_PID] "executing $0"
+
+# Debian PPP version has no support for replacing an existing default route
+# thus we emulate this ba an ip-up script https://phabricator.vyos.net/T2220.
+
+{% if 'auto' in default_route -%}
+
+# only insert a new default route if there is no default route configured
+routes=$(vtysh -c "show running-config" | sed -n "/ip route/,/!/p" | grep 0.0.0.0/0 | wc -l)
+if [ "$routes" -eq 0 ]; then
+ # No VRF, use default routing table
+ vtysh -c "conf t" -c "ip route 0.0.0.0/0 {{ intf }}"
+fi
+
+{% elif 'force' in default_route -%}
+
+# Retrieve current static default routes and remove it from the routing table
+vtysh -c "show running-config" | sed -n "/ip route/,/!/p" | grep 0.0.0.0/0 | while read route ; do
+ vtysh -c "conf t" -c "no ${route}"
+done
+# No VRF, use default routing table
+vtysh -c "conf t" -c "ip route 0.0.0.0/0 {{ intf }}"
+{% endif %}