pyping.py 文件源码

def ping(host, timeout=2, ping_id=None, udp=False):
    """Ping remote host.

    :param str host: Host name/address.
    :param float timeout: timeout.
    :param int ping_id: 16 bit integer to identify packet.
    """
    dest_addr = socket.gethostbyname(host)
    icmp = socket.getprotobyname('icmp')
    socket_type = socket.SOCK_DGRAM if udp else socket.SOCK_RAW
    raw_socket = socket.socket(socket.AF_INET, socket_type, icmp)

    ping_id = os.getpid() if ping_id is None else ping_id
    ping_id &= 0xffff

    seq_code = random.randint(1, 65535)

    latency = None

    start_ts = time.time()
    end_ts = start_ts + timeout

    send_ping(raw_socket, dest_addr, ping_id, seq_code)

    while time.time() < end_ts:
        r_ping_id, r_seq_code, r_recv_ts = receive_reply(raw_socket, timeout)
        if ping_id == r_ping_id and r_seq_code == seq_code:
            latency = r_recv_ts - start_ts
            break

    return latency