153 lines
2.7 KiB
C
153 lines
2.7 KiB
C
/*
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* File: tftp.h
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* Purpose: Data definitions for TFTP
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*
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* Notes:
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*/
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#ifndef _TFTP_H_
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#define _TFTP_H_
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#define TFTP_RRQ (1)
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#define TFTP_WRQ (2)
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#define TFTP_DATA (3)
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#define TFTP_ACK (4)
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#define TFTP_ERROR (5)
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#define TFTP_ERR_FNF 1
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#define TFTP_ERR_AV 2
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#define TFTP_ERR_DF 3
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#define TFTP_ERR_ILL 4
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#define TFTP_ERR_TID 5
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#define TFTP_FE 6
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#define TFTP_NSU 7
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#define TFTP_ERR_UD 0
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#define OCTET "octet"
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#define NETASCII "netascii"
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/* Protocol Header information */
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#define TFTP_HDR_OFFSET (ETH_HDR_LEN + IP_HDR_SIZE + UDP_HDR_SIZE)
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/* Timeout in seconds */
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#define TFTP_TIMEOUT 2
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/* Maximum TFTP Packet Size (payload only - no header) */
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#define TFTP_PKTSIZE 512
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/* Number of TFTP Data Buffers */
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#define NUM_TFTPBD 6
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/* Data Buffer Pointer Structure */
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typedef struct
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{
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uint8_t data[TFTP_PKTSIZE];
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uint16_t bytes;
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} DATA_BUF;
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/* TFTP RRQ/WRQ Packet */
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typedef struct
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{
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uint16_t opcode;
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char filename_mode[TFTP_PKTSIZE - 2];
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} RWRQ;
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/* TFTP DATA Packet */
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typedef struct
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{
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uint16_t opcode;
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uint16_t blocknum;
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uint8_t data[TFTP_PKTSIZE - 4];
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} DATA;
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/* TFTP Acknowledge Packet */
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typedef struct
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{
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uint16_t opcode;
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uint16_t blocknum;
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} ACK;
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/* TFTP Error Packet */
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typedef struct
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{
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uint16_t opcode;
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uint16_t code;
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char msg[TFTP_PKTSIZE - 4];
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} ERROR;
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/* TFTP Generic Packet */
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typedef struct
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{
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uint16_t opcode;
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} GEN;
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union TFTPpacket
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{
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RWRQ rwrq;
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DATA data;
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ACK ack;
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ERROR error;
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GEN generic;
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};
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/* TFTP Connection Status */
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typedef struct
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{
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/* Pointer to next character in buffer ring */
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uint8_t *next_char;
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/* Direction of current connection, read or write */
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uint8_t dir;
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/* Connection established flag */
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uint8_t open;
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/* Pointer to our Network InterFace */
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NIF *nif;
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/* File being transferred */
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char *file;
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/* Server IP address */
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IP_ADDR server_ip;
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/* Queue to hold the TFTP packets */
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QUEUE queue;
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/* Bytes received counter */
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uint32_t bytes_recv;
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/* Bytes sent counter */
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uint32_t bytes_sent;
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/* Bytes remaining in current Rx buffer */
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uint32_t rem_bytes;
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/* Server UDP port */
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uint16_t server_port;
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/* My UDP port */
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uint16_t my_port;
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/* Expected TFTP block number */
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uint16_t exp_blocknum;
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/* Keep track of the last packet acknowledged */
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uint16_t last_ack;
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/* Error Flag */
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uint8_t error;
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} TFTP_Connection;
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extern void tftp_handler(NIF *, NBUF *) ;
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extern int tftp_write (NIF *, char *, IP_ADDR_P, uint32_t, uint32_t);
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extern int tftp_read(NIF *, char *, IP_ADDR_P);
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extern void tftp_end(int);
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extern int tftp_in_char(void);
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#endif /* _TFTP_H_ */
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