Simple Python Port Scanner

port-scanner.py

#!/usr/bin/env python
import os, sys, socket

def usage():
	print "\n\nOption Switches:\nPlease define '--verbose' before you define '--custom', should you define either one.\n"
	print "--verbose 		-- Will show all connection attempts. Even failed ones."
	print "\nExample: python %s 127.0.0.1 --verbose" % sys.argv[0]
	pass

try:
	hostname = sys.argv[1]
	pass
except IndexError as e:
	if sys.argv[0].startswith('./'):
		print "%s <hostname>" % sys.argv[0]
		usage()
		sys.exit()
	else:
		print "./%s <hostname>" % sys.argv[0]
		usage()
		sys.exit()
	pass


# ping common ports
for port in range(1, 65535):
	try:
		sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # create/define a tcp socket
		sock.connect((hostname, port))
		server = (hostname, port)
		print "Host: %s is \033[92mopen\033[0m to \033[92mport %s!\033[0m" % server
		sock.close()
	except socket.error as e:
		server = (hostname, port)
		if "--verbose" in sys.argv:
			print "Host: %s is \033[91mnot\033[0m open to \033[91mport %s!\033[0m" % server
		else:
			pass
	except KeyboardInterrupt as k:
		print "Closing connection cleanly..."
		sock.close()
		sys.exit()
		pass
	pass


sock.close()