Python socket-based port scanning program instance code, python port scanning

Python socket-based port scanning program instance code, python port scanning

This article focuses on the Python port scanning program. The specific instance code is as follows.

Let's take a look at the first port scan program code,Obtain the IP address and port number of the local machine:

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() 

Port Scanner Based on Python socket

# Region # Name: PortScan # Purpose: scan the port opening status of the network segment host # Author: Hao Chen # Python3.4 # Export import socket def main (): ip_start = input ('Enter the start IP address (default: 127.0.0.1) ') if ip_start = '': ip_start = '127. 0.0.1 'ip_end = '127. 0.0.1 'else: ip_end = input ('enter end IP: ') if ip_end = '': Ip_end = '127. 0.0.1's = input ('Enter the target host's Start port: (common ports are scanned by default) ') if s = '': portList = [21, 22, 23, 25, 80,135,137,139,445,143 3, 1502,330 6, 3389,808 0, 9015] else: startport = int (s) s = input ('Enter the destination host end port (default: 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:])> I Nt (ip_end [x2 + 1:]): break; # Start to scan the port for port in portList: print ('% 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 () # Save the result in the file f = open ("IP_Port.txt", 'A') f. write (ip_start + ':' + str (port) + '\ n') f. close () failed t Exception: print ('server % s port % d is not connected! '% (Ip_start, port) # update ip_start I = ip_start.rfind ('. ') x = int (ip_start [I + 1:]) + 1 ip_start = ip_start [: I + 1] + str (x) print('after scanning, the result is saved in the ip_port.txt File ') if _ name _ = '_ main _': main ()

Summary

The above is all about the Python socket-based port scanner instance code. I hope it will be helpful to you. If you are interested, you can continue to refer to other related topics on this site. If you have any shortcomings, please leave a message. Thank you for your support!