• python 之实现ping测试延迟的两种方式


    .python实现ping返回延迟繁琐版

    #!/usr/bin/python3.7
    # !coding:utf-8
    __author__ = 'hsz'
    __date__ = 'Thu Feb 27 22:41:15 EST 2020'
    
    import time
    import struct
    import socket
    import select
    import sys
    
    
    def chesksum(data):
        """
        校验
        """
        n = len(data)
        m = n % 2
        sum = 0
        for i in range(0, n - m, 2):
            sum += (data[i]) + ((data[i + 1]) << 8)  # 传入data以每两个字节(十六进制)通过ord转十进制,第一字节在低位,第二个字节在高位
        if m:
            sum += (data[-1])
        # 将高于16位与低16位相加
        sum = (sum >> 16) + (sum & 0xffff)
        sum += (sum >> 16)  # 如果还有高于16位,将继续与低16位相加
        answer = ~sum & 0xffff
        # 主机字节序转网络字节序列(参考小端序转大端序)
        answer = answer >> 8 | (answer << 8 & 0xff00)
        return answer
    
        '''
        连接套接字,并将数据发送到套接字
        '''
    
    
    def raw_socket(dst_addr, imcp_packet):
        rawsocket = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.getprotobyname("icmp"))
        send_request_ping_time = time.time()
        # send data to the socket
        rawsocket.sendto(imcp_packet, (dst_addr, 80))
        return send_request_ping_time, rawsocket, dst_addr
    
        '''
        request ping
        '''
    
    
    def request_ping(data_type, data_code, data_checksum, data_ID, data_Sequence, payload_body):
        # 把字节打包成二进制数据
        imcp_packet = struct.pack('>BBHHH32s', data_type, data_code, data_checksum, data_ID, data_Sequence, payload_body)
        icmp_chesksum = chesksum(imcp_packet)  # 获取校验和
        imcp_packet = struct.pack('>BBHHH32s', data_type, data_code, icmp_chesksum, data_ID, data_Sequence, payload_body)
        return imcp_packet
        '''
        reply ping
        '''
    
    
    def reply_ping(send_request_ping_time, rawsocket, data_Sequence, timeout=2):
        while True:
            started_select = time.time()
            what_ready = select.select([rawsocket], [], [], timeout)
            wait_for_time = (time.time() - started_select)
            if what_ready[0] == []:  # Timeout
                return -1
            time_received = time.time()
            received_packet, addr = rawsocket.recvfrom(1024)
            icmpHeader = received_packet[20:28]
            type, code, checksum, packet_id, sequence = struct.unpack(
                ">BBHHH", icmpHeader
            )
            if type == 0 and sequence == data_Sequence:
                return time_received - send_request_ping_time
            timeout = timeout - wait_for_time
            if timeout <= 0:
                return -1
    
        '''
        实现 ping 主机/ip
        '''
    
    
    def ping(host):
        data_type = 8  # ICMP Echo Request
        data_code = 0  # must be zero
        data_checksum = 0  # "...with value 0 substituted for this field..."
        data_ID = 0  # Identifier
        data_Sequence = 1  # Sequence number
        payload_body = b'abcdefghijklmnopqrstuvwabcdefghi'  # data
        dst_addr = socket.gethostbyname(host)  # 将主机名转ipv4地址格式,返回以ipv4地址格式的字符串,如果主机名称是ipv4地址,则它将保持不变
        print("正在 Ping {0} [{1}] 具有 32 字节的数据:".format(host, dst_addr))
        for i in range(0, 4):
            icmp_packet = request_ping(data_type, data_code, data_checksum, data_ID, data_Sequence + i, payload_body)
            send_request_ping_time, rawsocket, addr = raw_socket(dst_addr, icmp_packet)
            times = reply_ping(send_request_ping_time, rawsocket, data_Sequence + i)
            if times > 0:
                print("来自 {0} 的回复: 字节=32 时间={1}ms".format(addr, int(times * 1000)))
                time.sleep(0.7)
            else:
                print("请求超时。")
    
    
    if __name__ == "__main__":
        # if len(sys.argv) < 2:
        #     sys.exit('Usage: ping.py <host>')
        ping('www.baidu.com')  # sys.argv[1]

    .python实现ping返回延迟简单版本

    from ping3 import ping
    
    
    def ping_host(ip):
        """
        获取节点的延迟的作用
        :param node:
        :return:
        """
        ip_address = ip
        response = ping(ip_address)
        print(response)
        if response is not None:
            delay = int(response * 1000)
            print(delay, "延迟")
            # 下面两行新增的
    
    
    ping_host('www.baidu.com')
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  • 原文地址:https://www.cnblogs.com/hszstudypy/p/12424817.html
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