#!/bin/sh

BASE="/var/packages/mesh/target"
CONFIG_DIR="/var/packages/mesh/etc"
config_file="$CONFIG_DIR/mesh.conf"
LOG_FILE="$BASE/var/log/mesh.log"
export LD_LIBRARY_PATH="$BASE/lib"
cd /

set_proxy()
{
	if [ -f /etc/proxy.conf ]; then
		. /etc/proxy.conf
		if [ "$proxy_enabled" = "yes" ]; then
			export http_proxy="$https_host":"$https_port"
		fi
	fi
}

start_service ()
{

    set_proxy

    if [ -f $config_file ]; then
       mkdir -p /var/backups
       echo "Backing up configuration file to /var/backups/mesh.conf.`date +%Y%m%d`"
       cp $config_file /var/backups/mesh.conf.`date +%Y%m%d`
       echo "Normalising and updating /etc/mesh.conf"
       ${BASE}/bin/mesh -useconf -normaliseconf < /var/backups/mesh.conf.`date +%Y%m%d` > $config_file
    else
       echo "Generating initial configuration file $config_file"
       echo "Please familiarise yourself with this file before starting RiV-mesh"
       sh -c "umask 0027 && ${BASE}/bin/mesh -genconf > '$config_file'"
    fi

    # Create the necessary file structure for /dev/net/tun
    if ( [ ! -c /dev/net/tun ] ); then
      if ( [ ! -d /dev/net ] ); then
      mkdir -m 755 /dev/net
    fi
      mknod /dev/net/tun c 10 200
      chmod 0755 /dev/net/tun
    fi

    # Load the tun module if not already loaded
    if ( !(lsmod | grep -q "^tun\s") ); then
      insmod /lib/modules/tun.ko
    fi
    
    #workaround for bin error:
    #Not multicasting on eth0 due to error: listen tcp [xxxx]:0: bind: cannot assign requested address
    sysctl net.ipv6.ip_nonlocal_bind=1

    # Launch the server in the background.
    ${BASE}/bin/mesh -useconffile "$config_file" \
    -httpaddress "http://[::]:19019" \
    -wwwroot "$BASE/www" \
    -logto "$BASE/var/log/mesh.log" &
    
    return $?
}

stop_service ()
{
    pid=`pidof -s mesh`
    if [ -z "$pid" ]; then
      echo "mesh was not running"
      exit 0
    fi
    kill "$pid"
}

status_service ()
{

    pid=`pidof -s mesh`

    if [[ ! -z "${pid}" ]] && [ -d /proc/${pid} ]; then
        return 0
    fi
    if [[ ! -z "${pid}" ]]; then
        return 1
    fi
    return 3
}

case $1 in
    start)
        start_service
        echo "Running RiV Mesh"
        exit 0
        ;;
    stop)
        stop_service
        echo "Stopped RiV Mesh"
        exit 0
        ;;
    status)
	status_service
        sts=$?
        if [ $sts -eq 0 ]; then
            echo "RiV Mesh is running"
        else
            echo "RiV Mesh is not running"
        fi
        exit $sts
        ;;

    log)
        if [ -f $LOG_FILE ];
        then
           echo $LOG_FILE
        fi
        exit 0
        ;;
    *)
        exit 1
        ;;
esac