wwan

#!/bin/sh -e

case "$2" in
  start)
    until timeout 10 mbim "$1" open; do
      [ $? -ne 124 ] && exit 1
    done
    mbim "$1" subscriber >/dev/null
    mbim "$1" connect "${3:-internet}" "${@:4}" >/dev/null
    mbim "$1" config | while read -r KEY VALUE; do
      case "$KEY" in
        interface)
          IF=$VALUE
          ip address flush "$IF" scope global
          ip link set "$IF" up
          ;;
        address)
          [ -n "$IF" ] && ip address add "$VALUE" dev "$IF"
          ;;
        gateway)
          [ -n "$IF" ] && ip route add default via "$VALUE"
          ;;
        mtu)
          [ -n "$IF" ] && ip link set "$IF" mtu "$VALUE"
          ;;
      esac
    done
    ;;

  stop)
    mbim "$1" interface 2>/dev/null | while read -r KEY VALUE; do
      case "$KEY" in
        interface)
          ip address flush "$VALUE" scope global
          ip link set "$VALUE" down
          ;;
      esac
    done
    timeout 1 mbim "$1" close
    ;;

  *)
    echo "Usage: $(basename "$0") DEVICE start|stop" >&2
    exit 64
    ;;
esac