connect to any freifunk franken hood

hoodconnect.sh

#!/bin/bash

KEYSRV_URL="https://keyserver.freifunk-franken.de/v2"
KEYSRV_URL_HOODS="${KEYSRV_URL}/hoods.php"
KEYSRV_URL_HOODFILE="${KEYSRV_URL}/index.php?hoodid="

TMP_DIR=$(mktemp -d)

cleanup() {
	rm -R "${TMP_DIR}"
}

trap cleanup EXIT

select_hood() {
	local -A hoods

	while read id name; do
		hoods[$name]=$id
	done < <(curl -s $KEYSRV_URL_HOODS | jq -r '.[] | @text "\(.id) \(.name)"')


	PS3="Select hood: "
	select hood in $(for h in ${!hoods[@]}; do echo $h; done | sort); do
		echo ${hoods[$hood]}
		break
	done
}

get_peers() {
	local hoodId=$1

	mkdir "${TMP_DIR}/peers"
	curl -s "${KEYSRV_URL_HOODFILE}${hoodId}" \
		| jq -r '.vpn[]|(@text "\(.name) \(.key) \(.address) \(.port)")' \
		| while read name key address port; do 
		cat <<- EOF > "${TMP_DIR}/peers/$name"
		key "${key}";
		remote "${address}" port ${port};
		EOF
		cat "${TMP_DIR}/peers/$name"
	done
}

run_fastd() {
	local fastdconf="${TMP_DIR}/fastd-$1.conf"
	cat <<- EOF > "${fastdconf}"
	interface "fastd-$1";
	method "null";
	secret "$(fastd --generate-key --machine-readable)";
	mtu 1426;
	secure handshakes no;
	on establish "ip link set fastd-$1 up";
	on up "batctl meshif bat0 if add fastd-$1; ip link set bat0 up";
	on post-down "ip link del dev bat0";
	EOF
	fastd --config "${fastdconf}" --config-peer-dir "${TMP_DIR}/peers"
}

main() {
	local hoodId

	hoodId=$(select_hood)

	get_peers $hoodId
	run_fastd $hoodId
}

main