How to call python-nmap to scan for live hosts on the LAN (code)

The content of this article is about how to call python-nmap to scan the LAN for surviving hosts (code). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Usage environment: Raspberry 3b netifaces python-nmap nmap

Call netifaces to automatically obtain the ip address:

def get_gateways():    
return netifaces.gateways()['default'][netifaces.AF_INET][0]

Change the ip The address generates a list of all IP addresses in the network segment:

def get_ip_lists(ip):
    ip_lists = []    
    for i in range(1, 256):
        ip_lists.append('{}{}'.format(ip[:-1], i))    
        return ip_lists

Mainly implements code and data segmentation:

def main(ip=None):
    ip=get_gateways()
    ip_lists=get_ip_lists(ip)
    nmScan,temp_ip_lists,hosts = nmap.PortScanner(),[],ip[:-1]+'0/24'
    ret = nmScan.scan(hosts=hosts, arguments='-sP')
    print('扫描时间：'+ret['nmap']['scanstats']['timestr']+'\n命令参数:'+ret['nmap']['command_line'])
    for ip in ip_lists:
        print('ip地址：'+ip+'：')
        if ip not in ret['scan']:
            temp_ip_lists.append(ip)
            print('扫描超时')
        else:print('已扫描到主机，主机名：'+ret['scan'][ip]['hostnames'][0]['name'])
    print(str(hosts) +' 网络中的存活主机:')
    for ip in temp_ip_lists:ip_lists.remove(ip)
    for ip in ip_lists:print(ip)

Full code:

#!/usr/bin/python
#_*_ coding:utf8 _*_
import netifaces,nmap

def get_gateways():
    return netifaces.gateways()['default'][netifaces.AF_INET][0]

def get_ip_lists(ip):
    ip_lists = []
    for i in range(1, 256):
        ip_lists.append('{}{}'.format(ip[:-1], i))
    return ip_lists

def main(ip=None):
    ip=get_gateways()
    ip_lists=get_ip_lists(ip)
    nmScan,temp_ip_lists,hosts = nmap.PortScanner(),[],ip[:-1]+'0/24'
    ret = nmScan.scan(hosts=hosts, arguments='-sP')
    print('扫描时间：'+ret['nmap']['scanstats']['timestr']+'\n命令参数:'+ret['nmap']['command_line'])
    for ip in ip_lists:
        print('ip地址：'+ip+'：')
        if ip not in ret['scan']:
            temp_ip_lists.append(ip)
            print('扫描超时')
        else:print('已扫描到主机，主机名：'+ret['scan'][ip]['hostnames'][0]['name'])
    print(str(hosts) +' 网络中的存活主机:')
    for ip in temp_ip_lists:ip_lists.remove(ip)
    for ip in ip_lists:print(ip)

if __name__ == '__main__':
    main()

Experimental screenshot:

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