Change Cython API to truncate data upon reception.

        cdef int32_t len

        with nogil:

            len = cprrt.PrrtSocket_recv(self._c_socket, <void*> buffer)

        return len, buffer

        return buffer[:len]

    def connect(self, host, port):

        cdef bytes encodedHost = host.encode("utf-8")

    def run(self):

        while(1):

            len, data = self.sock.recv()

            v = data[:len].decode('UTF-8')

            data = self.sock.recv()

            v = data.decode('UTF-8')

            seqno = v[:self.seqnoDigits]

            if seqno in self.received:

                self.duplicates = self.duplicates + 1