import socket
import time
from scapy.all import *
import optparse
def tcpconnect(host,port):
    try:
        conn = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
        conn.connect((host,port))
        print '[+]%d/tcp open' % (port)
        conn.close()
    except:
        pass
def udpconnect(host,port):
    try:
        rep = sr1(IP(dst=host)/UDP(dport=port),timeout=1,verbose=0)
        time.sleep(1)
        if rep.haslayer(ICMP()):
            print '[-]%d/udp not open' % (port)
    except:
        print '[+]%d/udp open' % (port)

def portscan(host):
    for port in range(1,1023):
        udpconnect(host,port)
def main():
    parser = optparse.OptionParser('usage\%\prog'+'-H <target host>')
    parser.add_option('-H',dest=tgtHost,type='string',help='specify target host')
    (option,args) = parser.parse_args()
    host = options.tgthost
    if host ==None:
        print parser.usage
        exit(0)
    portscan(host)

if __name__ == '__main__':
    main()