c-ftfp-server/tftp_server.h at main · josephwoodward/c-ftfp-server · GitHub

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#include <stdio.h>
#include <arpa/inet.h>

/**
 * Set flag to 1 to enable debugging log messages.
 */
#define DEBUG 0

struct tftp_server {
    int port;
    int retries;
    char *file;
};

/* typedef union { */

/*     uint16_t opcode; */

/*     struct { */
/* 	uint16_t opcode; /1* RRQ or WRQ *1/ */
/* 	uint8_t filename_and_mode[514]; */
/*     } request; */

/*     struct { */
/* 	uint16_t opcode; /1* DATA *1/ */
/* 	uint16_t block_number; */
/* 	uint8_t data[512]; */
/*     } data; */

/*     struct { */
/* 	uint16_t opcode; /1* ACK *1/ */
/* 	uint16_t block_number; */
/*     } ack; */

/*     struct { */
/* 	uint16_t opcode; /1* ERROR *1/ */
/* 	uint16_t error_code; */
/* 	uint8_t error_string[512]; */
/*     } error; */

/* } tftp_message; */

typedef struct {

    uint16_t opcode;

    union {

	struct {
	    char filename_and_mode[514];
	    char mode[8];
	} request;

	struct {
	    uint16_t block_number;
	    uint8_t data[512];
	} data;

	struct {
	    uint16_t block_number;
	} ack;

	struct {
	    uint16_t error_code;
	    uint8_t error_string[512];
	} error;

    };

} tftp_message;

int start_server(struct tftp_server *s);

/**
 * Transfers the specified source file to the addressed client using the given
 * client in BINARY mode transfer.
 *
 * @param  src_file  source file to be transferred;
 * @param  socket    socket to be used to transfer the file to the recipient
 *                   client;
 * @param  cli_addr  address of the client requesting the file transfer.
 */
void transfer_binary_mode(FILE *src_file, int socket, struct sockaddr_in *cli_addr);

int parse_message(int socket_desc, tftp_message *m,struct sockaddr_in *client_addr);