Python端口扫描简单程序

本文实例为大家分享了Python端口扫描的实现代码，供大家参考，具体内容如下

获取本机的IP和端口号:

    import socket 

    def get_my_ip(): 
      try: 
        csock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) 
        csock.connect(('8.8.8.8', 80)) 
        (addr, port) = csock.getsockname() 
        csock.close() 
        return addr,port 
      except socket.error: 
        return "127.0.0.1" 

    def int_to_ip(int_ip): 
      return socket.inet_ntoa(struct.pack('I', socket.htonl(int_ip))) 


    def ip_to_int(ip): 
      return socket.ntohl(struct.unpack("I", socket.inet_aton(str(ip)))[0]) 

    (ip,port)=get_my_ip() 
    print "ip=%s port=%d" %(ip,port) 

PortScan.py

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

    import optparse 
    from socket import * 
    from threading import * 

    screenLock = Semaphore(value=1) 

    def connScan(tgtHost, tgtPort): 
      try: 
        connSkt = socket(AF_INET, SOCK_STREAM) 
        connSkt.connect((tgtHost, tgtPort)) 
        connSkt.send('ViolentPython\r\n') 
        results = connSkt.recv(100) 
        screenLock.acquire() 
        print '[+] %d/tcp open' % tgtPort 
        print '[+] ' + str(results) 
      except: 
        screenLock.acquire() 
        print '[-] %d/tcp closed' % tgtPort 
      finally: 
      screenLock.release() 
      connSkt.close()  

    def portScan(tgtHost, tgtPorts): 
      try: 
        tgtIP = gethostbyname(tgtHost) 
      except: 
        print "[-] Cannot resolve '%s': Unknown host" %tgtHost 
        return 

      try: 
        tgtName = gethostbyaddr(tgtIP) 
        print '\n[+] Scan Results for: ' + tgtName[0] 
      except: 
        print '\n[+] Scan Results for: ' + tgtIP 

      setdefaulttimeout(1) 
      for tgtPort in tgtPorts: 
        t = Thread(target=connScan,args=(tgtHost,int(tgtPort))) 
        t.start() 

    def main(): 
      parser = optparse.OptionParser('usage %prog '+\ 
       '-H <target host> -p <target port>') 
      parser.add_option('-H', dest='tgtHost', type='string',\ 
       help='specify target host') 
      parser.add_option('-p', dest='tgtPort', type='string',\ 
       help='specify target port[s] separated by comma') 

      (options, args) = parser.parse_args() 

      tgtHost = options.tgtHost 
      tgtPorts = str(options.tgtPort).split(',') 

      if (tgtHost == None) | (tgtPorts[0] == None): 
      print parser.usage 
        exit(0) 

      portScan(tgtHost, tgtPorts) 


    if __name__ == '__main__': 
      main() 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。