#!/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

set -x

# add some info to syslog
DIALER_PID=$(cat /var/run/{{ intf }}.pid)
logger -t pppd[$DIALER_PID] "executing $0"

SED_OPT="ip 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

# 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=$(vtysh -c "show running-config" | sed -n "/${SED_OPT}/,/!/p" | grep 0.0.0.0/0 | wc -l)
if [ "$routes" -ne 0 ]; then
    exit 1
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 "/${SED_OPT}/,/!/p" | grep 0.0.0.0/0 | 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 "ip route 0.0.0.0/0 {{ intf }} ${VRF_NAME}"
logger -t pppd[$DIALER_PID] "added default route via {{ intf }} ${VRF_NAME}"