#!/bin/sh
#
# Maximilian Wilhelm <max@rfc2324.org>
#  --  Mon 31 Aug 2015 08:55:27 AM CEST
#

if [ $# != 1 ]; then
	echo "Usage: $(basename $0) fastd_instance | -a" >&2
	exit 1
fi

fastd_con () {
	socket_path=$(grep "status socket" "/etc/fastd/${1}/fastd.conf" | grep -o '/[0-9a-z/_.-]\+')

	echo -n "$1: "
	socat - "UNIX-CONNECT:${socket_path}" | jq '.peers[] | select( .connection ) | .name' | wc -l
}

if [ "${1}" = '-a' ]; then
	for fastd_instance in $(find /etc/fastd -mindepth 1 -maxdepth 1 -type d  -exec basename {} \;); do
		fastd_con ${fastd_instance}
	done
else
	if [ ! -d "/etc/fastd/${1}" ]; then
		echo "Invalid fastd instance \"$1\"." >&2
		exit 1
	fi

	fastd_con "${1}"
fi