/*
 *
 *  $Header: /ub/chuck/work/class/533/proj2/h/RCS/packet.h,v 2.3 90/11/20 01:27:48 chuck Exp $
 *
 *  Charles D. Cranor
 *  Department of Computer Science
 *  Washington University
 *
 *  REVISION HISTORY:
 *
 *  $Revision: 2.3 $
 *
 *  $Log:	packet.h,v $
 * Revision 2.3  90/11/20  01:27:48  chuck
 * deleted meaningless flags.
 * 
 * Revision 2.2  90/10/14  21:19:55  chuck
 * Added MTU.
 * 
 * Revision 2.1  90/10/14  21:17:10  chuck
 * updated packet structure.
 * 
 * Revision 2.0  90/10/14  21:07:17  chuck
 * Start of project 2.
 * 
 * Revision 1.2  90/10/05  00:44:57  chuck
 * Changed dest address name to "dst".
 * 
 * Revision 1.1  90/10/05  00:00:35  chuck
 * Initial revision
 * 
 *
 */

/*
 * packet.h   Chuck Cranor  CS-533  project2
 *
 * NOTE: All data is in "network byte order"
 */

#define MTU       1536        /* max size of a packet! */

#define FLAG_DATA 0x00000000  /* data packet */
#define FLAG_DACK 0x00000001  /* data ack flag bit */

struct packet_hdr {
  struct in_addr dst;  /* dest IP address */
  struct in_addr src;  /* source IP address */
  u_short sp, dp;      /* ports */ 
  u_short flag;        /* flags */
  u_short fdat;        /* data for selective repeat / go back n */
  u_short seq;         /* seq number */
  u_short dlen;        /* data length in bytes */
};