基于Python socket的端口扫描程序实例代码

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) 

#!/usr/bin/python/269876.html">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() 

#------------------------------------------------------------------------------- # 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()