import sys
import socket
def py2(CLIENT2_IP):
    #CLIENT2_IP = raw_input('ip: ')
    UDP_PORT = 5005
    MESSAGE = "Hello, World!"
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.bind(("0.0.0.0", UDP_PORT))
    sock.setblocking(0)
    for x in range(1,100):
        for P in xrange(1,65535):
            print (P)
            try:
                data, addr = sock.recvfrom(1024)
                print "received message:", data,  "addr:", addr
                if data == MESSAGE:
                    print "changing to constant transmission"
                    #raw_input('press any key to continue')
                    con2(sock, addr)
                else:
                    print "changing to constant reception"
                    #raw_input('press any key to continue')
                    rec2(sock, addr)
            except socket.error, msg:
                print "sending " + MESSAGE + " to  (" + CLIENT2_IP + ", " +  str(P) + ")"
                sock.sendto(MESSAGE, (CLIENT2_IP, P))

def con2(sock, addr):
    while True:
        try:
            data, addr = sock.recvfrom(1024)
            print "received message:", data,  "addr:", addr
            if data == "found!":
                print "changing to constant reception drom con2"
                rec2(sock, addr)
            else:
                if data == "stop!":
                    exit()
        except socket.error, msg:
            print "sending found! to  " + str(addr)
            sock.sendto("found!", addr)

def rec2(sock, addr):
    count = 0
    while count < 20:
        try:
            data, addr = sock.recvfrom(1024)
            print "received message:", data,  "addr:", addr
            count = count + 1
        except socket.error, msg:
            pass
    for i in xrange(1,15):
        print "sending stop! to  " + str(addr)
        sock.sendto("stop!", addr)
    exit()
py2(sys.argv[1])