Scan_simple.py

#coding=UTF-8
import optparse
import socket
import threading

screenLock = threading.Semaphore(value=1)
def connScan(tgtHost,tgtPort):
	try:
		connSkt = socket.socket(socket.AF_INET,socket.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 = socket.gethostbyname(tgtHost)
	except:
		print("[-] Cannot resolve '%s':Unkonwn host" %tgtHost)
		return
	try:
		tgtName = socket.gethostbyaddr(tgtIP)
		print('\n[+]Scan Results for:' + tgtName[0])
	except:
		print('\n[+]Scan Results for:' + tgtIP)
	socket.setdefaulttimeout(1)
	for tgtPort in tgtPorts:
		print('Scanning port' + str(tgtPort))
		t = threading.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='int',help='specify target port')
	(options,args) = parser.parse_args()
	tgtHost = options.tgtHost
	tgtPort = options.tgtPort
	args.append(tgtPort)
	if(tgtHost == None)|(tgtPort == None):
		print('[-] You must specify a target host and port[s]!')
		exit(0)
	portScan(tgtHost,args)
if __name__ == '__main__':
	main()