Thread: free needed or not?

hi every1,
I use not-blocked tcp socket and i needed help with that..

Code:

write(sock, (struct auth*)&autorization, sizeof(struct auth));
r = read(socket_fd, recv, sizeof(recv));
	for (i = 0; i < r; ++i){
		if (.. /*checkout recv*/...){
                               write(sock, &data, sizeof(data));
		}else{
		printf("Authentication fault\n");
		goto exit;
		}
	}
free(recv); // 1
r = read(socket_fd, recv, sizeof(recv));
// todo  smth...

1) it's free needed or not? Because in the next if autorization was succesfull, that should do something.