查找局域网可用Ip的程序

ip.py

# -*- coding: utf-8 -*-
# ! /usr/bin/env python

''' 查找局域网可用Ip的程序
by Gongchengdong
安装依赖：
sudo dnf install nmap
sudo pip install python-nmap

！！注意！！务必使用root权限运行。如：
sudo python freeIp.py
'''

import nmap


class FreeIpPicker:
    def __init__(self, hosts):
        self.hosts = hosts
        self.free_ips = []

    def get_free_ip(self):
        nm = nmap.PortScanner()
        nm.scan(hosts=self.hosts, arguments='-n -sP -PE')
        print "scan finish!"
        lives = [host[host.rfind('.') + 1:] for host in nm.all_hosts()]
        prefix = self.hosts[:self.hosts.rfind('.') + 1]
        for n in range(2, 254):
            if str(n) not in lives:
                self.free_ips.append(prefix + str(n))
        return self.free_ips


if __name__ == '__main__':
    picker = FreeIpPicker('172.18.24.2-254')
    free_ip = picker.get_free_ip()
    print "可用ip共计"+str(len(free_ip))+"个，enjoy it!"
    print free_ip