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#ifndef _TFTP_H
#define _TFTP_H
#define TFTP_PORT 69
#define TFTP_DEFAULTSIZE_PACKET 512
#define TFTP_MAX_PACKET 1432 /* 512 */
#define TFTP_RRQ 1
#define TFTP_WRQ 2
#define TFTP_DATA 3
#define TFTP_ACK 4
#define TFTP_ERROR 5
#define TFTP_OACK 6
#define TFTP_CODE_EOF 1
#define TFTP_CODE_MORE 2
#define TFTP_CODE_ERROR 3
#define TFTP_CODE_BOOT 4
#define TFTP_CODE_CFG 5
struct tftp_t {
struct iphdr ip;
struct udphdr udp;
uint16_t opcode;
union {
uint8_t rrq[TFTP_DEFAULTSIZE_PACKET];
struct {
uint16_t block;
uint8_t download[TFTP_MAX_PACKET];
} data;
struct {
uint16_t block;
} ack;
struct {
uint16_t errcode;
uint8_t errmsg[TFTP_DEFAULTSIZE_PACKET];
} err;
struct {
uint8_t data[TFTP_DEFAULTSIZE_PACKET+2];
} oack;
} u;
} PACKED;
/* define a smaller tftp packet solely for making requests to conserve stack
512 bytes should be enough */
struct tftpreq_t {
struct iphdr ip;
struct udphdr udp;
uint16_t opcode;
union {
uint8_t rrq[512];
struct {
uint16_t block;
} ack;
struct {
uint16_t errcode;
uint8_t errmsg[512-2];
} err;
} u;
} PACKED;
struct tftpreq_info_t {
const char *name;
unsigned short port;
unsigned short blksize;
} PACKED;
struct tftpblk_info_t {
char *data;
unsigned int block;
unsigned int len;
int eof;
} PACKED;
#define TFTP_MIN_PACKET (sizeof(struct iphdr) + sizeof(struct udphdr) + 4)
#endif /* _TFTP_H */
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