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/*********************************************************************
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*
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* FTP ServerModule for Microchip TCP/IP Stack
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*
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*********************************************************************
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* FileName: ftp.c
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* Dependencies: StackTsk.h
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* tcp.h
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* Processor: PIC18
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* Complier: MCC18 v1.00.50 or higher
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* HITECH PICC-18 V8.10PL1 or higher
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* Company: Microchip Technology, Inc.
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*
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* Software License Agreement
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*
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* The software supplied herewith by Microchip Technology Incorporated
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* (the “Company”) for its PICmicro® Microcontroller is intended and
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* supplied to you, the Company’s customer, for use solely and
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* exclusively on Microchip PICmicro Microcontroller products. The
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* software is owned by the Company and/or its supplier, and is
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* protected under applicable copyright laws. All rights are reserved.
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* Any use in violation of the foregoing restrictions may subject the
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* user to criminal sanctions under applicable laws, as well as to
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* civil liability for the breach of the terms and conditions of this
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* license.
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*
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* THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
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* WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
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* TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
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* IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
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* CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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*
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* HiTech PICC18 Compiler Options excluding device selection:
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* -FAKELOCAL -G -Zg -E -C
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*
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*
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* Author Date Comment
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*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* Nilesh Rajbharti 4/23/01 Original (Rev 1.0)
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* Nilesh Rajbharti 11/13/02 Fixed FTPServer()
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********************************************************************/
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#define THIS_IS_FTP
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#include <string.h>
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#include <stdlib.h>
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#include "ftp.h"
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#include "tcp.h"
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#include "tick.h"
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#include "mpfs.h"
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#if !defined(STACK_USE_FTP_SERVER)
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#error FTP SERVER module is not enabled.
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#error If you do not want FTP module, remove this file from your
|
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#error project to reduce your code size.
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#error If you do want FTP module, make sure that STACK_USE_FTP_SERVER
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#error is defined in StackTsk.h file.
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#endif
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| 60 |
|
| 61 |
|
| 62 |
#define FTP_COMMAND_PORT (21)
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| 63 |
#define FTP_DATA_PORT (20)
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#define FTP_TIMEOUT (TICK)((TICK)180 * TICK_SECOND)
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#define MAX_FTP_ARGS (7)
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#define MAX_FTP_CMD_STRING_LEN (31)
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typedef enum _SM_FTP
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{
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SM_FTP_NOT_CONNECTED,
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SM_FTP_CONNECTED,
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SM_FTP_USER_NAME,
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SM_FTP_USER_PASS,
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SM_FTP_RESPOND
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} SM_FTP;
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typedef enum _SM_FTP_CMD
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{
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SM_FTP_CMD_IDLE,
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SM_FTP_CMD_WAIT,
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SM_FTP_CMD_RECEIVE,
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SM_FTP_CMD_WAIT_FOR_DISCONNECT
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} SM_FTP_CMD;
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typedef enum _FTP_COMMAND
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{
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FTP_CMD_USER,
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FTP_CMD_PASS,
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FTP_CMD_QUIT,
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FTP_CMD_STOR,
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FTP_CMD_PORT,
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FTP_CMD_ABORT,
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FTP_CMD_UNKNOWN,
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FTP_CMD_NONE,
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} FTP_COMMAND;
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/*
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* Each entry in following table must match with that of FTP_COMMAND enum.
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*/
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ROM char *FTPCommandString[] =
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{
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{ "USER" }, // FTP_CMD_USER
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{ "PASS" }, // FTP_CMD_PASS
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{ "QUIT" }, // FTP_CMD_QUIT
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{ "STOR" }, // FTP_CMD_STOR
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{ "PORT" }, // FTP_CMD_PORT
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{ "ABOR" } // FTP_CMD_ABORT
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};
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#define FTP_COMMAND_TABLE_SIZE ( sizeof(FTPCommandString)/sizeof(FTPCommandString[0]) )
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typedef enum _FTP_RESPONSE
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{
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FTP_RESP_BANNER,
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FTP_RESP_USER_OK,
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FTP_RESP_PASS_OK,
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FTP_RESP_QUIT_OK,
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FTP_RESP_STOR_OK,
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FTP_RESP_UNKNOWN,
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FTP_RESP_LOGIN,
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FTP_RESP_DATA_OPEN,
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FTP_RESP_DATA_READY,
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FTP_RESP_DATA_CLOSE,
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FTP_RESP_OK,
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FTP_RESP_NONE // This must always be the last
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// There is no corresponding string.
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} FTP_RESPONSE;
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/*
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* Each entry in following table must match with FTP_RESPONE enum
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*/
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ROM char *FTPResponseString[] =
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{
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"220 Ready\r\n", // FTP_RESP_BANNER
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"331 Password required\r\n", // FTP_RESP_USER_OK
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"230 Logged in\r\n", // FTP_RESP_PASS_OK
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"221 Bye\r\n", // FTP_RESP_QUIT_OK
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"500 \r\n", // FTP_RESP_STOR_OK
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"502 Not implemented\r\n", // FTP_RESP_UNKNOWN
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"530 Login required\r\n", // FTP_RESP_LOGIN
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"150 Transferring data...\r\n", // FTP_RESP_DATA_OPEN
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"125 Done.\r\n", // FTP_RESP_DATA_READY
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"226 Transfer Complete\r\n", // FTP_RESP_DATA_CLOSE
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"200 ok\r\n" // FTP_RESP_OK
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};
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static union
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{
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struct
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{
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unsigned int bUserSupplied : 1;
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unsigned int bLoggedIn: 1;
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} Bits;
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BYTE Val;
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} FTPFlags;
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static TCP_SOCKET FTPSocket; // Main ftp command socket.
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static TCP_SOCKET FTPDataSocket; // ftp data socket.
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static WORD_VAL FTPDataPort; // ftp data port number as supplied by client
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static SM_FTP smFTP; // ftp server FSM state
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static SM_FTP_CMD smFTPCommand; // ftp command FSM state
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static FTP_COMMAND FTPCommand;
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static FTP_RESPONSE FTPResponse;
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static char FTPUser[FTP_USER_NAME_LEN];
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static char FTPString[MAX_FTP_CMD_STRING_LEN+2];
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static BYTE FTPStringLen;
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static char *FTP_argv[MAX_FTP_ARGS]; // Parameters for a ftp command
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static BYTE FTP_argc; // Total number of params for a ftp command
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static TICK lastActivity; // Timeout keeper.
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| 177 |
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static MPFS FTPFileHandle;
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/*
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* Private helper functions.
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*/
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static void ParseFTPString(void);
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static FTP_COMMAND ParseFTPCommand(char *cmd);
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static void ParseFTPString(void);
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static BOOL ExecuteFTPCommand(FTP_COMMAND cmd);
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static BOOL PutFile(void);
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static BOOL Quit(void);
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| 190 |
/*
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* Uncomment following line if ftp transactions are to be displayed on
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* RS-232 - for debug purpose only.
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*/
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//#define FTP_SERVER_DEBUG_MODE
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#define FTP_PUT_ENABLED
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#if defined(FTP_SERVER_DEBUG_MODE)
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static USARTPut(BYTE c)
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{
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| 200 |
while( !TXSTA_TRMT);
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TXREG = c;
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}
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#else
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| 205 |
#define USARTPut(a)
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| 206 |
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| 207 |
#endif
|
| 208 |
|
| 209 |
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| 210 |
/*********************************************************************
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* Function: void FTPInit(void)
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| 212 |
*
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| 213 |
* PreCondition: TCP module is already initialized.
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*
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| 215 |
* Input: None
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| 216 |
*
|
| 217 |
* Output: None
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| 218 |
*
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| 219 |
* Side Effects: None
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*
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| 221 |
* Overview: Initializes internal variables of FTP
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*
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* Note:
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********************************************************************/
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void FTPInit(void)
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{
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| 227 |
FTPSocket = TCPListen(FTP_COMMAND_PORT);
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smFTP = SM_FTP_NOT_CONNECTED;
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FTPStringLen = 0;
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FTPFlags.Val = 0;
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FTPDataPort.Val = FTP_DATA_PORT;
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}
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/*********************************************************************
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* Function: void FTPServer(void)
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*
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* PreCondition: FTPInit() must already be called.
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*
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* Input: None
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*
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* Output: Opened FTP connections are served.
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*
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* Side Effects: None
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| 245 |
*
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* Overview:
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*
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| 248 |
* Note: This function acts as a task (similar to one in
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* RTOS). This function performs its task in
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* co-operative manner. Main application must call
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* this function repeatdly to ensure all open
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* or new connections are served on time.
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********************************************************************/
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BOOL FTPServer(void)
|
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{
|
| 256 |
BYTE v;
|
| 257 |
TICK currentTick;
|
| 258 |
|
| 259 |
if ( !TCPIsConnected(FTPSocket) )
|
| 260 |
{
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| 261 |
FTPStringLen = 0;
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| 262 |
FTPCommand = FTP_CMD_NONE;
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| 263 |
smFTP = SM_FTP_NOT_CONNECTED;
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| 264 |
FTPFlags.Val = 0;
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| 265 |
smFTPCommand = SM_FTP_CMD_IDLE;
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| 266 |
return TRUE;
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| 267 |
}
|
| 268 |
|
| 269 |
if ( TCPIsGetReady(FTPSocket) )
|
| 270 |
{
|
| 271 |
lastActivity = TickGet();
|
| 272 |
|
| 273 |
while( TCPGet(FTPSocket, &v ) )
|
| 274 |
{
|
| 275 |
USARTPut(v);
|
| 276 |
FTPString[FTPStringLen++] = v;
|
| 277 |
if ( FTPStringLen == MAX_FTP_CMD_STRING_LEN )
|
| 278 |
FTPStringLen = 0;
|
| 279 |
}
|
| 280 |
TCPDiscard(FTPSocket);
|
| 281 |
|
| 282 |
|
| 283 |
if ( v == '\n' )
|
| 284 |
{
|
| 285 |
FTPString[FTPStringLen] = '\0';
|
| 286 |
FTPStringLen = 0;
|
| 287 |
ParseFTPString();
|
| 288 |
FTPCommand = ParseFTPCommand(FTP_argv[0]);
|
| 289 |
}
|
| 290 |
}
|
| 291 |
else if ( smFTP != SM_FTP_NOT_CONNECTED )
|
| 292 |
{
|
| 293 |
currentTick = TickGet();
|
| 294 |
currentTick = TickGetDiff(currentTick, lastActivity);
|
| 295 |
if ( currentTick >= FTP_TIMEOUT )
|
| 296 |
{
|
| 297 |
lastActivity = TickGet();
|
| 298 |
FTPCommand = FTP_CMD_QUIT;
|
| 299 |
smFTP = SM_FTP_CONNECTED;
|
| 300 |
}
|
| 301 |
}
|
| 302 |
|
| 303 |
switch(smFTP)
|
| 304 |
{
|
| 305 |
case SM_FTP_NOT_CONNECTED:
|
| 306 |
FTPResponse = FTP_RESP_BANNER;
|
| 307 |
lastActivity = TickGet();
|
| 308 |
/* No break - Continue... */
|
| 309 |
|
| 310 |
case SM_FTP_RESPOND:
|
| 311 |
SM_FTP_RESPOND_Label:
|
| 312 |
while( !TCPIsPutReady(FTPSocket) );
|
| 313 |
if ( TCPIsPutReady(FTPSocket) )
|
| 314 |
{
|
| 315 |
ROM char* pMsg;
|
| 316 |
|
| 317 |
pMsg = FTPResponseString[FTPResponse];
|
| 318 |
|
| 319 |
while( (v = *pMsg++) )
|
| 320 |
{
|
| 321 |
USARTPut(v);
|
| 322 |
TCPPut(FTPSocket, v);
|
| 323 |
}
|
| 324 |
TCPFlush(FTPSocket);
|
| 325 |
FTPResponse = FTP_RESP_NONE;
|
| 326 |
smFTP = SM_FTP_CONNECTED;
|
| 327 |
}
|
| 328 |
/* No break - this will speed up little bit */
|
| 329 |
|
| 330 |
case SM_FTP_CONNECTED:
|
| 331 |
if ( FTPCommand != FTP_CMD_NONE )
|
| 332 |
{
|
| 333 |
if ( ExecuteFTPCommand(FTPCommand) )
|
| 334 |
{
|
| 335 |
if ( FTPResponse != FTP_RESP_NONE )
|
| 336 |
smFTP = SM_FTP_RESPOND;
|
| 337 |
else if ( FTPCommand == FTP_CMD_QUIT )
|
| 338 |
smFTP = SM_FTP_NOT_CONNECTED;
|
| 339 |
|
| 340 |
FTPCommand = FTP_CMD_NONE;
|
| 341 |
smFTPCommand = SM_FTP_CMD_IDLE;
|
| 342 |
}
|
| 343 |
else if ( FTPResponse != FTP_RESP_NONE )
|
| 344 |
{
|
| 345 |
smFTP = SM_FTP_RESPOND;
|
| 346 |
goto SM_FTP_RESPOND_Label;
|
| 347 |
}
|
| 348 |
}
|
| 349 |
break;
|
| 350 |
|
| 351 |
|
| 352 |
}
|
| 353 |
|
| 354 |
return TRUE;
|
| 355 |
}
|
| 356 |
|
| 357 |
static BOOL ExecuteFTPCommand(FTP_COMMAND cmd)
|
| 358 |
{
|
| 359 |
switch(cmd)
|
| 360 |
{
|
| 361 |
case FTP_CMD_USER:
|
| 362 |
FTPFlags.Bits.bUserSupplied = TRUE;
|
| 363 |
FTPFlags.Bits.bLoggedIn = FALSE;
|
| 364 |
FTPResponse = FTP_RESP_USER_OK;
|
| 365 |
strncpy(FTPUser, FTP_argv[1], sizeof(FTPUser));
|
| 366 |
break;
|
| 367 |
|
| 368 |
case FTP_CMD_PASS:
|
| 369 |
if ( !FTPFlags.Bits.bUserSupplied )
|
| 370 |
FTPResponse = FTP_RESP_LOGIN;
|
| 371 |
else
|
| 372 |
{
|
| 373 |
if ( FTPVerify(FTPUser, FTP_argv[1]) )
|
| 374 |
{
|
| 375 |
FTPFlags.Bits.bLoggedIn = TRUE;
|
| 376 |
FTPResponse = FTP_RESP_PASS_OK;
|
| 377 |
}
|
| 378 |
else
|
| 379 |
FTPResponse = FTP_RESP_LOGIN;
|
| 380 |
}
|
| 381 |
break;
|
| 382 |
|
| 383 |
case FTP_CMD_QUIT:
|
| 384 |
return Quit();
|
| 385 |
|
| 386 |
case FTP_CMD_PORT:
|
| 387 |
FTPDataPort.v[1] = (BYTE)atoi(FTP_argv[5]);
|
| 388 |
FTPDataPort.v[0] = (BYTE)atoi(FTP_argv[6]);
|
| 389 |
FTPResponse = FTP_RESP_OK;
|
| 390 |
break;
|
| 391 |
|
| 392 |
case FTP_CMD_STOR:
|
| 393 |
return PutFile();
|
| 394 |
|
| 395 |
case FTP_CMD_ABORT:
|
| 396 |
FTPResponse = FTP_RESP_OK;
|
| 397 |
if ( FTPDataSocket != INVALID_SOCKET )
|
| 398 |
TCPDisconnect(FTPDataSocket);
|
| 399 |
break;
|
| 400 |
|
| 401 |
default:
|
| 402 |
FTPResponse = FTP_RESP_UNKNOWN;
|
| 403 |
break;
|
| 404 |
}
|
| 405 |
return TRUE;
|
| 406 |
}
|
| 407 |
|
| 408 |
static BOOL Quit(void)
|
| 409 |
{
|
| 410 |
switch(smFTPCommand)
|
| 411 |
{
|
| 412 |
case SM_FTP_CMD_IDLE:
|
| 413 |
#if defined(FTP_PUT_ENABLED)
|
| 414 |
if ( smFTPCommand == SM_FTP_CMD_RECEIVE )
|
| 415 |
MPFSClose();
|
| 416 |
#endif
|
| 417 |
|
| 418 |
if ( FTPDataSocket != INVALID_SOCKET )
|
| 419 |
{
|
| 420 |
#if defined(FTP_PUT_ENABLED)
|
| 421 |
MPFSClose();
|
| 422 |
#endif
|
| 423 |
TCPDisconnect(FTPDataSocket);
|
| 424 |
smFTPCommand = SM_FTP_CMD_WAIT;
|
| 425 |
}
|
| 426 |
else
|
| 427 |
goto Quit_Done;
|
| 428 |
break;
|
| 429 |
|
| 430 |
case SM_FTP_CMD_WAIT:
|
| 431 |
if ( !TCPIsConnected(FTPDataSocket) )
|
| 432 |
{
|
| 433 |
Quit_Done:
|
| 434 |
FTPResponse = FTP_RESP_QUIT_OK;
|
| 435 |
smFTPCommand = SM_FTP_CMD_WAIT_FOR_DISCONNECT;
|
| 436 |
}
|
| 437 |
break;
|
| 438 |
|
| 439 |
case SM_FTP_CMD_WAIT_FOR_DISCONNECT:
|
| 440 |
if ( TCPIsPutReady(FTPSocket) )
|
| 441 |
{
|
| 442 |
if ( TCPIsConnected(FTPSocket) )
|
| 443 |
TCPDisconnect(FTPSocket);
|
| 444 |
}
|
| 445 |
break;
|
| 446 |
|
| 447 |
}
|
| 448 |
return FALSE;
|
| 449 |
}
|
| 450 |
|
| 451 |
|
| 452 |
static BOOL PutFile(void)
|
| 453 |
{
|
| 454 |
BYTE v;
|
| 455 |
|
| 456 |
|
| 457 |
switch(smFTPCommand)
|
| 458 |
{
|
| 459 |
case SM_FTP_CMD_IDLE:
|
| 460 |
if ( !FTPFlags.Bits.bLoggedIn )
|
| 461 |
{
|
| 462 |
FTPResponse = FTP_RESP_LOGIN;
|
| 463 |
return TRUE;
|
| 464 |
}
|
| 465 |
else
|
| 466 |
{
|
| 467 |
FTPResponse = FTP_RESP_DATA_OPEN;
|
| 468 |
FTPDataSocket = TCPConnect(&REMOTE_HOST(FTPSocket), FTPDataPort.Val);
|
| 469 |
smFTPCommand = SM_FTP_CMD_WAIT;
|
| 470 |
}
|
| 471 |
break;
|
| 472 |
|
| 473 |
case SM_FTP_CMD_WAIT:
|
| 474 |
if ( TCPIsConnected(FTPDataSocket) )
|
| 475 |
{
|
| 476 |
#if defined(FTP_PUT_ENABLED)
|
| 477 |
if ( !MPFSIsInUse() )
|
| 478 |
#endif
|
| 479 |
{
|
| 480 |
#if defined(FTP_PUT_ENABLED)
|
| 481 |
FTPFileHandle = MPFSFormat();
|
| 482 |
#endif
|
| 483 |
|
| 484 |
smFTPCommand = SM_FTP_CMD_RECEIVE;
|
| 485 |
}
|
| 486 |
}
|
| 487 |
break;
|
| 488 |
|
| 489 |
case SM_FTP_CMD_RECEIVE:
|
| 490 |
if ( TCPIsGetReady(FTPDataSocket) )
|
| 491 |
{
|
| 492 |
/*
|
| 493 |
* Reload timeout timer.
|
| 494 |
*/
|
| 495 |
lastActivity = TickGet();
|
| 496 |
MPFSPutBegin(FTPFileHandle);
|
| 497 |
while( TCPGet(FTPDataSocket, &v) )
|
| 498 |
{
|
| 499 |
USARTPut(v);
|
| 500 |
|
| 501 |
#if defined(FTP_PUT_ENABLED)
|
| 502 |
MPFSPut(v);
|
| 503 |
#endif
|
| 504 |
}
|
| 505 |
FTPFileHandle = MPFSPutEnd();
|
| 506 |
TCPDiscard(FTPDataSocket);
|
| 507 |
}
|
| 508 |
else if ( !TCPIsConnected(FTPDataSocket) )
|
| 509 |
{
|
| 510 |
#if defined(FTP_PUT_ENABLED)
|
| 511 |
MPFSPutEnd();
|
| 512 |
MPFSClose();
|
| 513 |
#endif
|
| 514 |
TCPDisconnect(FTPDataSocket);
|
| 515 |
FTPDataSocket = INVALID_SOCKET;
|
| 516 |
FTPResponse = FTP_RESP_DATA_CLOSE;
|
| 517 |
return TRUE;
|
| 518 |
}
|
| 519 |
}
|
| 520 |
return FALSE;
|
| 521 |
}
|
| 522 |
|
| 523 |
|
| 524 |
|
| 525 |
static FTP_COMMAND ParseFTPCommand(char *cmd)
|
| 526 |
{
|
| 527 |
FTP_COMMAND i;
|
| 528 |
|
| 529 |
for ( i = 0; i < (FTP_COMMAND)FTP_COMMAND_TABLE_SIZE; i++ )
|
| 530 |
{
|
| 531 |
if ( !memcmppgm2ram((void*)cmd, (ROM void*)FTPCommandString[i], 4) )
|
| 532 |
return i;
|
| 533 |
}
|
| 534 |
|
| 535 |
return FTP_CMD_UNKNOWN;
|
| 536 |
}
|
| 537 |
|
| 538 |
static void ParseFTPString(void)
|
| 539 |
{
|
| 540 |
BYTE *p;
|
| 541 |
BYTE v;
|
| 542 |
enum { SM_FTP_PARSE_PARAM, SM_FTP_PARSE_SPACE } smParseFTP;
|
| 543 |
|
| 544 |
smParseFTP = SM_FTP_PARSE_PARAM;
|
| 545 |
p = (BYTE*)&FTPString[0];
|
| 546 |
|
| 547 |
/*
|
| 548 |
* Skip white blanks
|
| 549 |
*/
|
| 550 |
while( *p == ' ' )
|
| 551 |
p++;
|
| 552 |
|
| 553 |
FTP_argv[0] = (char*)p;
|
| 554 |
FTP_argc = 1;
|
| 555 |
|
| 556 |
while( (v = *p) )
|
| 557 |
{
|
| 558 |
switch(smParseFTP)
|
| 559 |
{
|
| 560 |
case SM_FTP_PARSE_PARAM:
|
| 561 |
if ( v == ' ' || v == ',' )
|
| 562 |
{
|
| 563 |
*p = '\0';
|
| 564 |
smParseFTP = SM_FTP_PARSE_SPACE;
|
| 565 |
}
|
| 566 |
else if ( v == '\r' || v == '\n' )
|
| 567 |
*p = '\0';
|
| 568 |
break;
|
| 569 |
|
| 570 |
case SM_FTP_PARSE_SPACE:
|
| 571 |
if ( v != ' ' )
|
| 572 |
{
|
| 573 |
FTP_argv[FTP_argc++] = (char*)p;
|
| 574 |
smParseFTP = SM_FTP_PARSE_PARAM;
|
| 575 |
}
|
| 576 |
break;
|
| 577 |
}
|
| 578 |
p++;
|
| 579 |
}
|
| 580 |
}
|
| 581 |
|
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