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我们。