/* tftp defines */

#define TFTP_SESSIONS_MAX 3

#define TFTP_SERVER 69

#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_FILENAME_MAX 512

struct tftp_t {
    struct ip ip;
    struct udphdr udp;
    u_int16_t tp_op;
    union {
        struct {
            u_int16_t tp_block_nr;
            u_int8_t tp_buf[512];
        } tp_data;
        struct {
            u_int16_t tp_error_code;
            u_int8_t tp_msg[512];
        } tp_error;
        u_int8_t tp_buf[512 + 2];
    } x;
};

void tftp_input(struct mbuf *m);