#ifndef NBD_TFTP_PACKET_H
#define NBD_TFTP_PACKET_H

#include <stdint.h>

typedef enum {
	RRQ	= 1,
	WRQ	= 2,
	DAT	= 3,
	ACK	= 4,
	ERR	= 5,
} nbd_tftp_opcode;

typedef enum {
	ERROR		= 0,
	ENOTFOUND	= 1,
	EACCESS		= 2,
	ENOSPACE	= 3,
	EOPERATION	= 4,
	ETRANS		= 5,
	EEXISTS		= 6,
	EUSER		= 7,
} nbd_tftp_ecode;

typedef struct {
	uint16_t opcode;
	char *filename;
	char *mode;
} nbd_tftp_packet_rq;

typedef struct {
	uint16_t opcode;
	uint16_t block_num;
	char *data;
} nbd_tftp_packet_data;

typedef struct {
	uint16_t opcode;
	uint16_t block_num;
} nbd_tftp_packet_ack;

typedef struct {
	uint16_t opcode;
	uint16_t err;
	char *emsg;
} nbd_tftp_packet_error;

char *nbd_tftp_error_to_message(nbd_tftp_ecode error);

#endif