#ifndef _DRFP_H
#define _DRFP_H

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
			u_int requestOrReplyCode;	//file operation request or reply
			u_int requestSequenceNumber;	//reply should match this number from the request
} DRFP_HDR;

typedef struct {
	u_int flag;			//flag bits to use for opening a file
	char filename[0];
} DRFP_OPEN_BLOCK;

//valid open flags
#define DRFP_OPEN_RDONLY 0x0001		//read only mode
#define DRFP_OPEN_WRONLY 0x0002		//write only mode
#define DRFP_OPEN_RDWR 	0x0003		//read/write mode
#define DRFP_OPEN_CREAT	0x0200		//create a file when none exists
#define DRFP_OPEN_TRUNC	0x0400		//truncate and set to zero
#define DRFP_OPEN_EXCL	0x0800		//error if file already exists on create

typedef struct {
	u_int result;		//flag bits to show result of the open
	u_int fd;			//file descriptor for the opened file
	
} DRFP_OPEN_R_BLOCK;
//valid open reply result flags
#define DRFP_OPENR_OKAY		0	//open okay
#define DRFP_OPENR_ENOENT	2	//file not found
#define DRFP_OPENR_EACCES	13	//violation of permissions
#define DRFP_OPENR_EEXIST	17	//file already exists
#define DRFP_OPENR_ENFILE	23	//max files already opened
#define DRFP_OPENR_ENOSPC	28	//no space on disk
#define DRFP_OPENR_EROFS	30	//trying to open a read-only file by writing to it
#define DRFP_OPENR_EDQUOT	122	//no space in directory
#define DRFP_OPENR_UNKNOWN	0xffff	//unknown open error

typedef struct {
	u_int fd;			//file descriptor for the file to close
}DRFP_CLOSE_BLOCK;

typedef struct {
	u_int result;		//flag bits to show result of the close
}DRFP_CLOSE_R_BLOCK;

//valid close reply result flags
#define DRFP_CLOSER_OKAY	0	//file closed
#define DRFP_CLOSER_EBADF	9	//the given fd has not been opened
#define DRFP_CLOSER_UNKNOWN	0xffff	//unknown close error

typedef struct {
	u_int fd;           //file descriptor for the file to read
	u_int numBytes;     //num bytes to read
}DRFP_READ_BLOCK;

typedef struct {
	u_int result;       //flag bits to show result of the read
	u_int numBytes;     //num bytes in buffer
	char data[0];
}DRFP_READ_R_BLOCK;

//valid read reply result flags
#define DRFP_READR_OKAY     0   //read okay
#define DRFP_READR_EIO      5   //error on read
#define DRFP_READR_EBADF    9   //the given fd has not been opened
#define DRFP_READR_UNKNOWN  0xffff  //unknown read error

typedef struct {
	u_int fd;           //file descriptor for the file to write to
	u_int numBytes;     //num bytes to write
	char data[0];           //data passed from the PS2 that we need to write out to a file
}DRFP_WRITE_BLOCK;


typedef struct {
	u_int result;       //flag bits to show result of the write
	u_int numBytes;     //num bytes written
}DRFP_WRITE_R_BLOCK;

//valid write reply result flags
#define DRFP_WRITER_OKAY    0   //write okay
#define DRFP_WRITER_EIO     5   //error on write
#define DRFP_WRITER_EBADF   9   //the given fd has not been opened
#define DRFP_WRITER_ENOSPC   28   //the given fd has not been opened
#define DRFP_WRITER_UNKNOWN 0xffff  //unknown write error

typedef struct 
{
	u_int fd;			//file descriptor for the file to seek in
	u_int offset;		//amount to move file pointer, in bytes
	u_int base;			//flag for where to start seek from
} DRFP_SEEK_BLOCK;

typedef struct {
	u_int result;		//flag bits to show result of the seek
	u_int filePos;		//position of the file pointer after seek
} DRFP_SEEK_R_BLOCK;

//valid seek reply result flags
#define DRFP_SEEKR_OKAY		0	//seek okay
#define DRFP_SEEKR_EBADF	9	//the given fd has not been opened
#define DRFP_SEEKR_UNKNOWN	0xffff	//unknown seek error

//message type codes (request and replies)
#define DRFP_CODE_OPEN		0 	//open request
#define DRFP_CODE_OPENR		1	//open reply
#define DRFP_CODE_CLOSE		2 	//close request
#define DRFP_CODE_CLOSER	3	//close reply
#define DRFP_CODE_READ		4	//read request
#define DRFP_CODE_READR		5	//read reply
#define DRFP_CODE_WRITE		6	//write request
#define DRFP_CODE_WRITER	7	//write reply
#define DRFP_CODE_SEEK		8	//seek request
#define DRFP_CODE_SEEKR		9 	//seek reply

#ifdef __cplusplus
}
#endif

#endif /* _DRFP_H */