/**************************************************************************************/
/*															Header for Sendrec.c																	*/
/*												Copyright(C)1999 Peter Armstrong														*/
/*																	Release 2.0																				*/
/**************************************************************************************/

/* function return and command reply values */
#define	OK							1
#define	NG							0
#define	BAD						 -1		/* also indicates timeout for some functions */
#define	TIMEOUT				 -2

/* header defines */
#define	HDR_SIZE 				8				/* header byte length, °HEADR<size><chksum> */
#define	H_CHKSUM				7				/* checksum index position */
#define	H_SIZE					6				/* size index position */

#define	INTER_SIZE			8				/* size of integer array,°IT<4byte integer><chksum> */
#define	INTER_NUM				3				/* integer start in array */
#define	REPLY_SIZE			1				/* OK/NG/BAD */				

#define	MAX_RETRIES			5				/* max send/rec retries */

/* command prefixes */
#define	PSX_CMD					0xFD
#define	PSX2_CMD				0xFC
#define	PC_CMD					0xFB
#define	FS_CMD					0xF8

/* indexes for data within commands */
#define	MSG_ID					0				/* message identifier */
#define	CMD_ID					1				/* individual command id */
#define	CMD_CHKSUM			7				/* command's checksum */
#define	CMD_SIZE				8				/* command size */

/* ²CNTx00 */
#define	CNT_TYPE				4				/* connection type */

/* ²STxx00 */
#define	ST_SIZE					3				/* start data size */
#define	ST_DIFF					4				/* start frame difference */

/* ²ACKx00 */
#define	ACK_VAL					4				/* command acknowledge value */

/* psx command identifiers */
#define	PCMD_CNT				'C'				/* connect */
#define	PCMD_XCNT				'X'				/* cancel previous connect command */
#define	PCMD_START			'S'				/* packet transfer start */
#define	PCMD_ACK				'A'				/* command received acknowledgement */
#define	PCMD_DISC				'D'				/* break connection */
#define	PCMD_EXIT				'E'				/* remote psx exit notification */
#define	PCMD_BLOCK			'B'				/* read/write/canx data block transfer */

/* commands/messages read/written within callback function */
struct cmds
{
	int			exit;											/* remote psx has quit */
	int			command;									/* stored command to be sent */
	int			loc_reply;								/* stored reply to be sent */
	int			rem_reply;								/* command reply received */
	int			reply_await;							/* local waiting for a reply from remote */
	int			connect;									/* connect command received */
	int			cnt_type;									/* remote connect command value */
	int			start;										/* start command received */
	int			st_size;									/* remote start command packet data size value */
	int			st_diff;									/* remote start command frame difference value */
	int			acknowledge;							/* acknowledge command stored */
	int			ack_val;									/* acknowledge value */
	int			block;										/* read/write block command received */
	int			blk_id;										/* block identifier */
	u_char	*cmd;											/* command to send */
	char	loc_rpy;										/* local reply value */
	char	rem_rpy;										/* remote reply value */
};


/* prototypes */
int		Read_Text(char *text_str,char *hdr_p);
int		Read_Header(char	*hdr_p);
int		Read_Text_Str(char *text_p, int size);
int		Send_Text(char *text_p);
int		Send_Header(int size);
int		Send_Text_Str(char *text_p, int size);
int		Read_Integer(int *int_p);
int		Send_Integer(int num);
int		Read_WrReply(u_int timer);
int		Read_Reply(u_int	timer);
void	Send_Reply(char	rpy_val);
int		Port_Write(char *data_p,int size);
int		Port_Read(char	*read_p,int to_read, u_int timer);
void	vs_PsxCmds(void);
void	vs_Read_PsxReply(char rpy);
int		vs_Sio_CmdRead(char *buffer, int num);
void	vs_Read_PsxCmd(u_char *rem_cmd);
int		Send_PsxCmd(u_char *loc_cmd);
int		Cmd_Reply(int rpy_val);