# This function completes on all available network interfaces
# -a: restrict to active interfaces only
# -w: restrict to wireless interfaces only
#
_available_interfaces()
{
	local cmd

	if [ "${1:-}" = -w ]; then
		cmd="iwconfig"
	elif [ "${1:-}" = -a ]; then
		cmd="ifconfig"
	else
		cmd="ifconfig -a"
	fi

	COMPREPLY=( $( eval $cmd 2>/dev/null | \
		sed -ne 's|^\('$cur'[^[:space:][:punct:]]\{1,\}\).*$|\1|p') )
}