send_recv_data
int send_recv_data(int lfd, int fd, uint32_t total_bytes);
err = send_recv_data(srv_fd, cli_fd, total_bytes);
ASSERT_OK(send_recv_data(lfd, fd, total_bytes), "send_recv_data");
ASSERT_OK(send_recv_data(lfd, fd, total_bytes), "send_recv_data");
err = send_recv_data(server_fd, client_fd, TX_BYTES_COUNT);