export ip=$1
export port=$2
export tmout=$3

if [[ "$ip" == "" ]]; then
  echo "usage: "$0" <ip> [port=80] [timeout=1]"
  exit 1
fi
if [[ "$port" == "" ]]; then
  export port=80
fi
if [[ "$tmout" == "" ]]; then
  export tmout=1
fi

python -c 'import socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout('$tmout')
print("ok" if sock.connect_ex(("'$ip'", '$port')) == 0 else "timeout")
'