clash_service.sh

#!/system/bin/sh

mark_id="2020"
table_id="2020"
tun_device="utun"
tun_ip="198.18.0.0/16"
bin_name="clash"
bin_path="/system/bin/${bin_name}"
clash_data_dir="/sdcard/Documents/clash"
conf_file="${clash_data_dir}/config.yaml"
geoip_file="${clash_data_dir}/Country.mmdb"
pid_file="${clash_data_dir}/${bin_name}.pid"

create_tun_link() {
    mkdir -p /dev/net
    if [ ! -L /dev/net/tun ] ; then
        ln -s /dev/tun /dev/net/tun
    fi
}

add_rule() {
    ip rule add fwmark ${mark_id} table ${table_id} pref 5000
    ip rule add from ${tun_ip} to ${tun_ip} table ${table_id} pref 14000
}

del_rule() {
    ip rule del fwmark ${mark_id} table ${table_id} pref 5000
    ip rule del from ${tun_ip} to ${tun_ip} table ${table_id} pref 14000
}

add_route() {
    ip route add default dev ${tun_device} table ${table_id}
    ip route add ${tun_ip} dev ${tun_device} table ${table_id}
}

flush_route() {
    ip route flush table ${table_id}
}

wait_clash_listen() {
    wait_count=0
    port_bind_program=$(netstat -antp | grep 7892 | awk '{print $7}' | awk -F '[/]' '{print $2}')
    while [ "${port_bind_program}" != "clash" ] && [ ${wait_count} -lt 30 ] ; do
        sleep 1
        port_bind_program=$(netstat -antp | grep 7892 | awk '{print $7}' | awk -F '[/]' '{print $2}')
        wait_count=$((${wait_count} + 1))
    done
    if [ "${port_bind_program}" = "clash" ] && probe_clash_alive ; then
        return 0
    else
        return 1
    fi
}

probe_clash_alive() {
    [ -f ${pid_file} ] && cmd_file="/proc/`cat ${pid_file}`/cmdline" || return 1
    [ -f ${cmd_file} ] && grep -q ${bin_name} ${cmd_file} && return 0 || return 1
}

start_service() {
    if probe_clash_alive ; then
        exit 0
    elif [ -f ${conf_file} ] && [ -f ${geoip_file} ] && ${bin_name} -d ${clash_data_dir} -t ; then
        chown root:sdcard_rw ${bin_path}
        chmod 6755 ${bin_path}
        create_tun_link
        nohup ${bin_name} -d ${clash_data_dir} &
        echo -n $! > ${pid_file}
        if wait_clash_listen ; then
            add_rule
            add_route
            return 0
        else
            rm -f ${pid_file}
            return 1
        fi
    else
        return 2
    fi
}

stop_service() {
    kill -9 `cat ${pid_file}` || killall ${bin_name} || kill `cat ${pid_file}`
    sleep 1
    del_rule
    flush_route
    rm -f ${pid_file}
}

case "$1" in
    start)
        start_service
        ;;
    stop)
        stop_service
        ;;
    restart)
        stop_service
        sleep 1
        start_service
        ;;
    *)
        echo "$0: usage: $0 { start | stop | restart }"
        ;;
esac