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