python 之实现ping测试延迟的两种方式

一.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]

二 .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')