Python端口扫描简单程序

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()

#!/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
') 
 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 '
[+] Scan Results for: ' + tgtName[0] 
 except: 
 print '
[+] 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()