#!/bin/sh
# Simple script to switch wan interface

lan_port=""
mgmt_vlan=""

usage()
{
  echo "Usage: $(basename $0) [-l lan] [-m mgmtvlan] <wan>" >&2
  echo "  lan - optional lan interface, e.g. eth0." >&2
  echo "  mgmtvlan - optional management vlan id, e.g. 4090" >&2
  echo "  wan - wan interface." >&2
}


switch_port()
{
  wan_port=$1

  stop network
  stop wan
  echo $wan_port > /etc/config/wanport
  echo $lan_port > /etc/config/lanport
  echo $mgmt_vlan > /etc/config/mgmtvlan
  if [ "x$lan_port" != "x" ]; then
    start network
  fi
  start wan
}


while getopts l:m: o; do
  case $o in
    l) lan_port=$OPTARG;;
    m) mgmt_vlan=$OPTARG;;
  esac
done
shift $(($OPTIND-1))

if [ $# -ne 1 ]; then
  usage
  exit 1
fi

switch_port $1