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portscanner.py
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portscanner.py
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# Script Name : portscanner.py
# Author : Craig Richards
# Created : 20 May 2013
# Last Modified :
# Version : 1.0
# Modifications :
# Description : Port Scanner, you just pass the host and the ports
import optparse # Import the module
from socket import * # Import the module
from threading import * # Import the module
screenLock = Semaphore(value=1) # Prevent other threads from preceeding
def connScan(tgtHost, tgtPort): # Start of the function
try:
connSkt = socket(AF_INET, SOCK_STREAM) # Open a socket
connSkt.connect((tgtHost, tgtPort))
connSkt.send('')
results=connSkt.recv(100)
screenLock.acquire() # Acquire the lock
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): # Start of the function
try:
tgtIP = gethostbyname(tgtHost) # Get the IP from the hostname
except:
print "[-] Cannot resolve '%s': Unknown host"%tgtHost
return
try:
tgtName = gethostbyaddr(tgtIP) # Get hostname from IP
print '\n[+] Scan Results for: ' +tgtName[0]
except:
print '\n[+] Scan Results for: ' + tgtIP
setdefaulttimeout(1)
for tgtPort in tgtPorts: # Scan host and ports
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] seperated by a 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()