# sample tcp client in python that uses binary comm

from socket import *
from struct import *   # for packing/unpacking
import sys

serveraddr = sys.argv[1]
serverport = int(sys.argv[2])

cfd = socket(AF_INET, SOCK_STREAM)

rv = cfd.connect((serveraddr,serverport))  # note extra ()'s
if (rv==0): raise "connection failed"

s = cfd.recv(4)  # read 4 byte string
(x1,) = unpack("I",s)  # unpack as unsigned int
x = htonl(x1)       # byte ordering conversion
buf = cfd.recv(x)   # read x bytes to string buffer
print "received buffer: ", buf
m = len(buf)-8
cfd.send(buf[m:])   # send last 8 bytes of buffer over socket

cfd.close()
print "complete"