#!/usr/bin/env bash

STARTUP_CONFIG=${STARTUP_CONFIG:="/etc/vpp/startup.conf"}
CLAB_VPP_FILE=${CLAB_VPP_FILE:=/etc/vpp/clab.vpp}
NETNS=${NETNS:="dataplane"}

echo "Creating dataplane namespace"
/usr/bin/mkdir -p /etc/netns/$NETNS
/usr/bin/touch /etc/netns/$NETNS/resolv.conf
/usr/sbin/ip netns add $NETNS

echo "Generating $CLAB_VPP_FILE"
: > $CLAB_VPP_FILE
MTU=9216
for IFNAME in $(ip -br link show type veth | cut -f1 -d@ | grep -v ^eth0$); do
  MAC=$(ip -br link show dev $IFNAME | awk '{ print $3 }')
  echo " * $IFNAME hw-addr $MAC mtu $MTU"
  ip link set $IFNAME up mtu $MTU
  cat << EOF >> $CLAB_VPP_FILE
create host-interface name $IFNAME hw-addr $MAC
set interface name host-$IFNAME $IFNAME
set interface mtu $MTU $IFNAME
set interface state $IFNAME up

EOF
done

echo "Starting VPP"
exec /usr/bin/vpp -c $STARTUP_CONFIG