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#ifndef NBD_TFTP_PACKET_H
#define NBD_TFTP_PACKET_H
#include <stdint.h>
#include <unistd.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;
size_t datalen;
} 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);
char *nbd_tftp_ser_data(nbd_tftp_packet_data d);
char *nbd_tftp_ser_data_from_parts(uint16_t blocknum, char *data, size_t datalen);
nbd_tftp_packet_data nbd_tftp_de_data(char *data, size_t len);
char *nbd_tftp_ser_error(nbd_tftp_packet_error e);
char *nbd_tftp_ser_error_from_code(nbd_tftp_ecode error);
char *nbd_tftp_ser_ack(nbd_tftp_packet_ack ack);
char *nbd_tftp_ser_ack_from_block_num(uint16_t block_num);
nbd_tftp_packet_ack nbd_tftp_de_ack(char *buf, ssize_t buflen);
#endif
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