packet.h

/* CSci 4061 F2014 Assignment 3
 * Section 3
 * Date: 10/10/2014
 * Name: Jialun Jiang, Yaozhang Xu, Shang Ju
 * ID:   4467970,      4944346,     4455103
 */

#ifndef PACKET_H
#define PACKET_H

#define INTERVAL 0
// Interval for timer. Interval you need to send the packets to the receiver
#define INTERVAL_USEC 500000

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ipc.h>
#include <sys/msg.h>

#include "mm.h"

#define MAX_PACKETS 10  /* Max packets allowed in the message */
#define PACKET_SIZE 3  
#define MSGSIZE 128
#define key 4061 /* key which will be used for identifying the queue */
#define QUEUE_MSG_TYPE 1 /* message type for queue messages. Send receive only these types of messages from the queue */

typedef char data_t[PACKET_SIZE];

typedef struct {
  int how_many; /* number of packets in the message */
  int which;    /* which packet in the message */
  data_t data;  /* packet data */
} packet_t;

/* Keeps track of packets that have arrived for the message */
typedef struct {
  int num_packets;
  void *data[MAX_PACKETS];
} message_t;
 
/* The queue message used to send the pid */
typedef struct {
  long mtype;
  int pid;
} pid_queue_msg;

/* The queue message used to send the packets */
typedef struct {
  long mtype;
  packet_t pkt;
} packet_queue_msg;

#endif