/* Protocol 7  Same as Protocol 5 except that this is simplex.
 */

#define MAX_SEQ 7	/* should be 2^n - 1 */
typedef enum {frame_arrival, cksum_err, timeout, network_layer_ready, ack_timeout} event_type;
#include "protocol.h"

static boolean between(seq_nr a, seq_nr b, seq_nr c)
{
}

/* same as before, except that no acks are piggybacked */
static void send_data(seq_nr frame_nr, packet buffer[])
{
}

/* for sending acks */
static void send_ack(seq_nr frame_expected) {
}

void sender7(void) {
}

void receiver7(void) {
}