#ifndef msg_h
#define msg_h

#define REG		1
#define PEN		2
#define ERASER	3
#define CURSOR	4
#define TEXT	5
#define CLEAN	6
#define DISC	7
#define CONN	8
#define QUIT	9
#define BOB		10
#define NOB		11
#define ACK		12
#define NAK		13

/* Format of message types

	REG(B).Filler(B).HostName(40).PortID(S).UserLogin(20)
	PEN(B).SIZE(B).X(S).Y(S)
	TEXT(B).LENGTH(B).X(S).Y.(S).TEXT_DATA(indicated by LENGTH)
	BOB(B).Filler(B).W(S).L(S).LENGTH(S).BITMAP_DATA(indicated by LENGTH)
	NOB(B).Filler(B).LINE_NO(S).LENGTH(S).BITMAP_DATA(indicated by LENGTH)
	ERASER(B).SIZE(B).X(S).Y(S).
	CURSOR(B).Filler(B).X(S).Y(S).
	CLEAN_SCREEN(B)
	DISC(B)
	CONN(B).size(B).name(B)
*/

struct RegRecord {
	unsigned char msgType;
	unsigned char Filler;
	char hostname[40];
	short portId;
	char userLogin[20];
};

struct PenRecord {
	unsigned char msgType;
	unsigned char size;
	short X;
	short Y;
};

struct TextRecord {
	unsigned char msgType;
	unsigned char size;
	short X;
	short Y;
	char buf[256];
};

struct BOBRecord {
	unsigned char msgType;
	unsigned char filler;
	short W;
	short H;
	short Length;
	unsigned char x_bits[256];
};

struct NOBRecord {
	unsigned char msgType;
	unsigned char filler;
	short LineNo;
	short Length;
	unsigned char x_bits[256];
};

struct EraserRecord {
	unsigned char msgType;
	unsigned char size;
	short X;
	short Y;
};

struct CursorRecord {
	unsigned char msgType;
	unsigned char filler;
	short X;
	short Y;
};

struct DiscRecord {
   unsigned char msgType;
};

struct ConnRecord {
   unsigned char msgType;
   unsigned char size;
   char name[20];
	char originator[20];
};

struct CleanRecord {
   unsigned char msgType;
};

struct QuitRecord {
   unsigned char msgType;
};

/* message from IS */
struct ACKRecord {
   unsigned char msgType;
   unsigned char Filler;
	char userLogin[20]; /* destination user login */
	char originator[20];
	char hostname[20];
	short portId;
};

/* message from IS */
struct NAKRecord {
   unsigned char msgType;
   unsigned char Filler;
	char userLogin[20]; /* destination user login */
	char reason[80];    /* reason that the request being rejected */
	char originator[20];
};

union Record {
	struct RegRecord		rr;
   struct PenRecord     pr;
   struct TextRecord    tr;
	struct BOBRecord 		bbr;
	struct NOBRecord		nbr;
   struct EraserRecord  er;
   struct CursorRecord  cr;
   struct CleanRecord   clr;
   struct DiscRecord    dr;
   struct ConnRecord    nr;
   struct QuitRecord    qr;
	struct NAKRecord		nakr;
	struct ACKRecord		ackr;
};

#endif