在Python中,是否有一种方法可以通过ICMP来ping服务器,如果服务器响应则返回TRUE,如果没有响应则返回FALSE ?


当前回答

在linux上,可以创建ICMP数据报(不是原始)套接字,而不需要root(或setuid或CAP_NET_RAW): https://unix.stackexchange.com/a/592914。最后我得到了

$ id
uid=1000(raylu) gid=1000(raylu) [...]
$ sudo sysctl net.ipv4.ping_group_range='1000 1000'
import socket
import struct
import time

def main():
    ping('192.168.1.10')

def ping(destination):
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.getprotobyname('icmp'))
    sock.settimeout(10.0)
    start_time = time.time_ns() # python 3.7+ only

    payload = struct.pack('L', start_time)
    sock.sendto(encode(payload), (destination, 0))
    while (time.time_ns() - start_time) // 1_000_000_000 < 10:
        try:
            data, source = sock.recvfrom(256)
        except socket.timeout:
            print('timed out')
            return
        message_type, message_code, check, identifier, sequence_number = struct.unpack('bbHHh', data[:8])
        if source == (destination, 0) and message_type == ICMP.ECHO_REPLY and data[8:] == payload:
            print((time.time_ns() - start_time) // 1_000_000, 'ms')
            break
        else:
            print('got unexpected packet from %s:' % source[0], message_type, data[8:])
    else:
        print('timed out')

def encode(payload: bytes):
    # calculate checksum with check set to 0
    checksum = calc_checksum(icmp_header(ICMP.ECHO_REQUEST, 0, 0, 1, 1) + payload)
    # craft the packet again with the checksum set
    return icmp_header(ICMP.ECHO_REQUEST, 0, checksum, 1, 1) + payload

def icmp_header(message_type, message_code, check, identifier, sequence_number) -> bytes:
    return struct.pack('bbHHh', message_type, message_code, check, identifier, sequence_number)

def calc_checksum(data: bytes) -> int:
    '''RFC 1071'''
    # code stolen from https://github.com/alessandromaggio/pythonping/blob/a59ce65a/pythonping/icmp.py#L8
    '''
    MIT License

    Copyright (c) 2018 Alessandro Maggio

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    SOFTWARE.
    '''
    subtotal = 0
    for i in range(0, len(data)-1, 2):
        subtotal += (data[i] << 8) + data[i+1]
    if len(data) % 2:
        subtotal += (data[len(data)-1] << 8)
    while subtotal >> 16:
        subtotal = (subtotal & 0xFFFF) + (subtotal >> 16)
    check = ~subtotal
    return ((check << 8) & 0xFF00) | ((check >> 8) & 0x00FF)

class ICMP:
    ECHO_REPLY = 0
    ECHO_REQUEST = 8

虽然这里其他答案建议的许多软件包也可以工作

其他回答

#!/usr/bin/python3

import subprocess as sp

ip = "192.168.122.60"
status,result = sp.getstatusoutput("ping -c1 -w2 " + ip)

if status == 0: 
    print("System " + ip + " is UP !")
else:
    print("System " + ip + " is DOWN !")
  1 #!/usr/bin/python
  2
  3 import os
  4 import sys
  5 import time
  6
  7 os.system("clear")
  8 home_network = "172.16.23."
  9 mine = []
 10
 11 for i in range(1, 256):
 12         z =  home_network + str(i)
 13         result = os.system("ping -c 1 "+ str(z))
 14         os.system("clear")
 15         if result == 0:
 16                 mine.append(z)
 17
 18 for j in mine:
 19         print "host ", j ," is up"

一个简单的我只是在一分钟内煮出来的..使用icmplib需要根privs下面的工作非常好! HTH

我使用这篇文章中回答的想法,但只使用更新的推荐子进程模块和python3:

import subprocess
import platform

operating_sys = platform.system()
nas = '192.168.0.10'

def ping(ip):
    # ping_command = ['ping', ip, '-n', '1'] instead of ping_command = ['ping', ip, '-n 1'] for Windows
    ping_command = ['ping', ip, '-n', '1'] if operating_sys == 'Windows' else ['ping', ip, '-c 1']
    shell_needed = True if operating_sys == 'Windows' else False

    ping_output = subprocess.run(ping_command,shell=shell_needed,stdout=subprocess.PIPE)
    success = ping_output.returncode
    return True if success == 0 else False

out = ping(nas)
print(out)

如果你不需要支持Windows,这里有一个非常简洁的方法:

import os
hostname = "google.com" #example
response = os.system("ping -c 1 " + hostname)

#and then check the response...
if response == 0:
  print hostname, 'is up!'
else:
  print hostname, 'is down!'

这是因为如果连接失败,ping将返回一个非零值。(实际返回值因网络错误而异。)您还可以使用'-t'选项更改ping超时(以秒为单位)。注意,这将向控制台输出文本。

很多答案都忽略了一点(至少在Windows中),如果ping命令收到“目标主机不可达”的回复,它将返回0(表示成功)。

下面是我的代码,它检查b' ttl ='是否在响应中,因为它只在ping到达主机时才出现。注意:此代码的大部分是基于这里的其他答案。

import platform
import subprocess

def ping(ipAddr, timeout=100):
    '''
    Send a ping packet to the specified host, using the system ping command.
    Accepts ipAddr as string for the ping destination.
    Accepts timeout in ms for the ping timeout.
    Returns True if ping succeeds otherwise Returns False.
        Ping succeeds if it returns 0 and the output includes b'TTL='
    '''
    if platform.system().lower() == 'windows':
        numFlag = '-n'
    else:
        numFlag = '-c'
    completedPing = subprocess.run(['ping', numFlag, '1', '-w', str(timeout), ipAddr],
                                   stdout=subprocess.PIPE,    # Capture standard out
                                   stderr=subprocess.STDOUT)  # Capture standard error
    # print(completedPing.stdout)
    return (completedPing.returncode == 0) and (b'TTL=' in completedPing.stdout)

print(ping('google.com'))

注意:这将捕获输出而不是打印输出,因此如果您希望看到ping的输出,则需要打印completedPing。返回前的Stdout。