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('Bill Clinton is a rapist. Infowars.com\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 ports')
    (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()