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TFTP upgraded to use a core function library (in tftpcore.c) which will be

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shared between TFTP, TFTM and MTFTP protocols.
This commit is contained in:
Michael Brown
2005-06-01 13:13:05 +00:00
parent 0b048e9cfb
commit 53a4436d94
8 changed files with 256 additions and 199 deletions
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161
src/include/tftp.h
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@@ -1,13 +1,17 @@
#ifndef TFTP_H
#define TFTP_H
/** @file */
#include "in.h"
#include "buffer.h"
#include "nic.h"
#include "ip.h"
#include "udp.h"
#define TFTP_PORT 69
#define TFTP_DEFAULTSIZE_PACKET 512
#define TFTP_MAX_PACKET 1432 /* 512 */
#define TFTP_PORT 69 /**< Default TFTP server port */
#define TFTP_DEFAULT_BLKSIZE 512
#define TFTP_MAX_BLKSIZE 1432 /* 512 */
#define TFTP_RRQ 1
#define TFTP_WRQ 2
@@ -16,52 +20,131 @@
#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
#define TFTP_ERR_FILE_NOT_FOUND 1 /**< File not found */
#define TFTP_ERR_ACCESS_DENIED 2 /**< Access violation */
#define TFTP_ERR_DISK_FULL 3 /**< Disk full or allocation exceeded */
#define TFTP_ERR_ILLEGAL_OP 4 /**< Illegal TFTP operation */
#define TFTP_ERR_UNKNOWN_TID 5 /**< Unknown transfer ID */
#define TFTP_ERR_FILE_EXISTS 6 /**< File already exists */
#define TFTP_ERR_UNKNOWN_USER 7 /**< No such user */
#define TFTP_ERR_BAD_OPTS 8 /**< Option negotiation failed */
struct tftp_t {
/** A TFTP request (RRQ) packet */
struct tftp_rrq {
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;
char data[TFTP_DEFAULT_BLKSIZE];
} PACKED;
/* define a smaller tftp packet solely for making requests to conserve stack
512 bytes should be enough */
struct tftpreq_t {
/** A TFTP data (DATA) packet */
struct tftp_data {
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;
uint16_t block;
uint8_t data[TFTP_MAX_BLKSIZE];
} PACKED;
/** A TFTP acknowledgement (ACK) packet */
struct tftp_ack {
struct iphdr ip;
struct udphdr udp;
uint16_t opcode;
uint16_t block;
} PACKED;
/** A TFTP error (ERROR) packet */
struct tftp_error {
struct iphdr ip;
struct udphdr udp;
uint16_t opcode;
uint16_t errcode;
char errmsg[TFTP_DEFAULT_BLKSIZE];
} PACKED;
/** A TFTP options acknowledgement (OACK) packet */
struct tftp_oack {
struct iphdr ip;
struct udphdr udp;
uint16_t opcode;
uint8_t data[TFTP_DEFAULT_BLKSIZE];
} PACKED;
/** The common header of all TFTP packets */
struct tftp_common {
struct iphdr ip;
struct udphdr udp;
uint16_t opcode;
} PACKED;
/** A union encapsulating all TFTP packet types */
union tftp_any {
struct tftp_common common;
struct tftp_rrq rrq;
struct tftp_data data;
struct tftp_ack ack;
struct tftp_error error;
struct tftp_oack oack;
};
/**
* TFTP state
*
* This data structure holds the state for an ongoing TFTP transfer.
*/
struct tftp_state {
/** TFTP server address
*
* This is the IP address and UDP port from which data packets
* will be sent, and to which ACK packets should be sent.
*/
struct sockaddr_in server;
/** TFTP client address
*
* The IP address, if any, is the multicast address to which
* data packets will be sent. The client will always send
* packets from its own IP address.
*
* The UDP port is the port from which the open request will
* be sent, and to which data packets will be sent. (Due to
* the "design" of the MTFTP protocol, the master client will
* receive its first data packet as unicast, and subsequent
* packets as multicast.)
*/
struct sockaddr_in client;
/** Master client
*
* This will be true if the client is the master client for a
* multicast protocol (i.e. MTFTP or TFTM). (It will always
* be true for a non-multicast protocol, i.e. plain old TFTP).
*/
int master;
/** Data block size
*
* This is the "blksize" option negotiated with the TFTP
* server. (If the TFTP server does not support TFTP options,
* this will default to 512).
*/
unsigned int blksize;
/** File size
*
* This is the value returned in the "tsize" option from the
* TFTP server. If the TFTP server does not support the
* "tsize" option, this value will be zero.
*/
off_t tsize;
/** Last received block
*
* The block number of the most recent block received from the
* TFTP server. Note that the first data block is block 1; a
* value of 0 indicates that no data blocks have yet been
* received.
*/
unsigned int block;
};
struct tftpreq_info_t {
struct sockaddr_in *server;