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標籤：cti   hostname   try   class   .com   sys   rip   info   主機   

通過python的socket模組中的getaddrinfo進行給定主機/網域名稱的80連接埠探測

#!/usr/bin/env python3#-*- encoding:utf8 -*-import argparse,socket,sysdef connect_to(hostname_or_ip):    try:        infolist = socket.getaddrinfo(            hostname_or_ip,‘www‘,0,socket.SOCK_STREAM,0,            socket.AI_ADDRCONFIG | socket.AI_V4MAPPED | socket.AI_CANONNAME,        )    except socket.gaierror as e:        print(‘Name service failure:‘, e.args[1])    info = infolist[0]    socket_args = info[0:3]    address = info[4]    s = socket.socket(*socket_args)    try:        s.connect(address)    except socket.error as e:        print(‘Network failure‘ , e.args[1])    else:        print(‘Success: host‘ , info[3] , ‘is listening on TCP port 80‘)if __name__ == "__main__":    parser = argparse.ArgumentParser(description=‘Try connecting to port 80‘)    parser.add_argument(‘hostname‘ , help=‘hostname that you want to contact‘)    connect_to(parser.parse_args().hostname)

示範：

[email protected]:~/PycharmProjects/networking$ ./getaddr.py google.cn
Success: host google.cn is listening on TCP port 80
[email protected]:~/PycharmProjects/networking$ ./getaddr.py google.hk
Network failure Connection refused
[email protected]:~/PycharmProjects/networking$ ./getaddr.py sina.cn
Success: host sina.cn is listening on TCP port 80
[email protected]:~/PycharmProjects/networking$ ./getaddr.py baidu.com
Success: host baidu.com is listening on TCP port 80
[email protected]:~/PycharmProjects/networking$ ./getaddr.py localhost
Network failure Connection refused
[email protected]:~/PycharmProjects/networking$

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