基于Python socket的端口扫描程序实例代码

本文研究的主要是Python的端口扫描程序，具体实例代码如下。

先来看看第一个端口扫描程序代码，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() 

基于Python socket的端口扫描程序

#-------------------------------------------------------------------------------
# Name:  PortScan
# Purpose:  扫描网段主机的端口开放情况
# Author:  Hao Chen
# Python3.4
#-------------------------------------------------------------------------------
import socket
def main():
 ip_start=input('请输入开始IP：(默认:127.0.0.1)')
 if ip_start=='':
  ip_start='127.0.0.1'
  ip_end='127.0.0.1'
 else:
  ip_end=input('请输入结束IP：')
  if ip_end=='':
   ip_end='127.0.0.1' 

 s=input('请输入目标主机开始端口：(默认扫描常用端口)')
 if s=='':
  portList=[21, 22, 23, 25, 80, 135, 137, 139, 445, 1433, 1502, 3306, 3389, 8080, 9015]
 else:
  startport=int(s)
  s=input('请输入目标主机结束端口：(默认:65535)')
  if s=='':
   endport=65535
  else:
   endport=int(s)
  portList=[i for i in range(startport,endport+1)] 

 while 1:
  #ip_start<ip_end
  x1=ip_start.rfind('.');
  x2=ip_end.rfind('.')
  if int(ip_start[x1+1:])>int(ip_end[x2+1:]):
   break; 

  #开始扫描端口
  for port in portList:
   print('正在扫描%s ：%d' %(ip_start,port))
   try:
    sk = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sk.settimeout(10)
    sk.connect((ip_start,port))
    sk.settimeout(None)
    print('Server %s port %d OK!' % (ip_start,port))
    sk.close() 

    #结果保存在文件中
    f=open("IP_Port.txt",'a')
    f.write(ip_start+' : '+str(port)+'\n')
    f.close()
   except Exception:
    print('Server %s port %d is not connected!' % (ip_start,port)) 

  #更新ip_start
  i=ip_start.rfind('.')
  x=int(ip_start[i+1:])+1
  ip_start=ip_start[:i+1]+str(x) 

 print('扫描完成，结果保存在IP_Port.txt文件中') 

if __name__ == '__main__':
 main() 

总结

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