使用 Python 检查来自 IP 地址的网络连接

Question

如何使用 python 检查是否仍有来自特定 IP 地址的连接。

Answer 1

As far as I understood the OP is looking for active connection certain ip, meaning he wants to check locally if there is active connection exists. It looks like something along lines of netstat to me. There are several options:

1. You can use psutils as demonstrated in this post. You will want to cycle the active processes and query active connections.

2. You could use netstat.py - a clone of netstat by Jay Loden, Giampaolo Rodola' to do the job for you.

:

You can do something like that:

import psutil

def remote_ips():
    '''
    Returns the list of IPs for current active connections

    '''

    remote_ips = []

    for process in psutil.process_iter():
        try:
            connections = process.get_connections(kind='inet')
        except psutil.AccessDenied or psutil.NoSuchProcess:
            pass
        else:
            for connection in connections:
                if connection.remote_address and connection.remote_address[0] not in remote_ips:
                    remote_ips.append(connection.remote_address[0])

    return remote_ips

def remote_ip_present(ip):
    return ip in remote_ips()

This is how it works:

>>>remote_ips()
['192.168.1.50', '192.168.1.15', '192.168.1.52', '198.252.206.16', '198.252.206.17'] 
>>>remote_ip_present('192.168.1.52')
True
>>>remote_ip_present('10.1.1.1')
False

Answer 2

ping the ip address

import os
#192.168.1.10 is the ip address
ret = os.system("ping -o -c 3 -W 3000 192.168.1.10")
if ret != 0:
    print "pc still alive"

well in any case you really want to check for availability of incoming connection on the PC you are trying to connect you need to make a program that will receive the connection which is already out of the question.

Answer 3

You can use socket library :

import socket

try:
    socket.gethostbyaddr(your_ip_adrress)
except socket.herror:
    print u"Unknown host"

Answer 4

if you are on Windows:

import os
ret = os.system("ping -n 3 1.1.1.1")
if ret != 0:
     print("Ip address responding")

The -n argument is for how many times to ping it

if you are on LInux:

import os
ret = os.system("ping -c 3 1.1.1.1")
if ret != 0:
     print("Ip address responding")

Answer 5

import os
address = "my_ip_address"
os.system('ping ' + address)