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micropython/cc3200/ftp/ftp.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Daniel Campora
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdint.h>
#include <stdio.h>
#include "py/mpstate.h"
#include "py/obj.h"
#include "lib/timeutils/timeutils.h"
#include "lib/oofatfs/ff.h"
#include "extmod/vfs.h"
#include "extmod/vfs_fat.h"
#include "inc/hw_types.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "rom_map.h"
#include "prcm.h"
#include "pybrtc.h"
#include "ftp.h"
#include "simplelink.h"
#include "modnetwork.h"
#include "modwlan.h"
#include "modusocket.h"
#include "debug.h"
#include "serverstask.h"
#include "fifo.h"
#include "socketfifo.h"
#include "updater.h"
#include "moduos.h"
/******************************************************************************
DEFINE PRIVATE CONSTANTS
******************************************************************************/
#define FTP_CMD_PORT 21
#define FTP_ACTIVE_DATA_PORT 20
#define FTP_PASIVE_DATA_PORT 2024
#define FTP_BUFFER_SIZE 512
#define FTP_TX_RETRIES_MAX 25
#define FTP_CMD_SIZE_MAX 6
#define FTP_CMD_CLIENTS_MAX 1
#define FTP_DATA_CLIENTS_MAX 1
#define FTP_MAX_PARAM_SIZE (MICROPY_ALLOC_PATH_MAX + 1)
#define FTP_UNIX_TIME_20000101 946684800
#define FTP_UNIX_TIME_20150101 1420070400
#define FTP_UNIX_SECONDS_180_DAYS 15552000
#define FTP_DATA_TIMEOUT_MS 5000 // 5 seconds
#define FTP_SOCKETFIFO_ELEMENTS_MAX 4
#define FTP_CYCLE_TIME_MS (SERVERS_CYCLE_TIME_MS * 2)
/******************************************************************************
DEFINE PRIVATE TYPES
******************************************************************************/
typedef enum {
E_FTP_RESULT_OK = 0,
E_FTP_RESULT_CONTINUE,
E_FTP_RESULT_FAILED
} ftp_result_t;
typedef enum {
E_FTP_STE_DISABLED = 0,
E_FTP_STE_START,
E_FTP_STE_READY,
E_FTP_STE_END_TRANSFER,
E_FTP_STE_CONTINUE_LISTING,
E_FTP_STE_CONTINUE_FILE_TX,
E_FTP_STE_CONTINUE_FILE_RX
} ftp_state_t;
typedef enum {
E_FTP_STE_SUB_DISCONNECTED = 0,
E_FTP_STE_SUB_LISTEN_FOR_DATA,
E_FTP_STE_SUB_DATA_CONNECTED
} ftp_substate_t;
typedef struct {
bool uservalid : 1;
bool passvalid : 1;
} ftp_loggin_t;
typedef enum {
E_FTP_NOTHING_OPEN = 0,
E_FTP_FILE_OPEN,
E_FTP_DIR_OPEN
} ftp_e_open_t;
typedef enum {
E_FTP_CLOSE_NONE = 0,
E_FTP_CLOSE_DATA,
E_FTP_CLOSE_CMD_AND_DATA,
} ftp_e_closesocket_t;
typedef struct {
uint8_t *dBuffer;
uint32_t ctimeout;
union {
FF_DIR dp;
FIL fp;
};
int16_t lc_sd;
int16_t ld_sd;
int16_t c_sd;
int16_t d_sd;
int16_t dtimeout;
uint16_t volcount;
uint8_t state;
uint8_t substate;
uint8_t txRetries;
uint8_t logginRetries;
ftp_loggin_t loggin;
uint8_t e_open;
bool closechild;
bool enabled;
bool special_file;
bool listroot;
} ftp_data_t;
typedef struct {
char * cmd;
} ftp_cmd_t;
typedef struct {
char * month;
} ftp_month_t;
typedef enum {
E_FTP_CMD_NOT_SUPPORTED = -1,
E_FTP_CMD_FEAT = 0,
E_FTP_CMD_SYST,
E_FTP_CMD_CDUP,
E_FTP_CMD_CWD,
E_FTP_CMD_PWD,
E_FTP_CMD_XPWD,
E_FTP_CMD_SIZE,
E_FTP_CMD_MDTM,
E_FTP_CMD_TYPE,
E_FTP_CMD_USER,
E_FTP_CMD_PASS,
E_FTP_CMD_PASV,
E_FTP_CMD_LIST,
E_FTP_CMD_RETR,
E_FTP_CMD_STOR,
E_FTP_CMD_DELE,
E_FTP_CMD_RMD,
E_FTP_CMD_MKD,
E_FTP_CMD_RNFR,
E_FTP_CMD_RNTO,
E_FTP_CMD_NOOP,
E_FTP_CMD_QUIT,
E_FTP_NUM_FTP_CMDS
} ftp_cmd_index_t;
/******************************************************************************
DECLARE PRIVATE DATA
******************************************************************************/
static ftp_data_t ftp_data;
static char *ftp_path;
static char *ftp_scratch_buffer;
static char *ftp_cmd_buffer;
static const ftp_cmd_t ftp_cmd_table[] = { { "FEAT" }, { "SYST" }, { "CDUP" }, { "CWD" },
{ "PWD" }, { "XPWD" }, { "SIZE" }, { "MDTM" },
{ "TYPE" }, { "USER" }, { "PASS" }, { "PASV" },
{ "LIST" }, { "RETR" }, { "STOR" }, { "DELE" },
{ "RMD" }, { "MKD" }, { "RNFR" }, { "RNTO" },
{ "NOOP" }, { "QUIT" } };
static const ftp_month_t ftp_month[] = { { "Jan" }, { "Feb" }, { "Mar" }, { "Apr" },
{ "May" }, { "Jun" }, { "Jul" }, { "Ago" },
{ "Sep" }, { "Oct" }, { "Nov" }, { "Dec" } };
static SocketFifoElement_t ftp_fifoelements[FTP_SOCKETFIFO_ELEMENTS_MAX];
static FIFO_t ftp_socketfifo;
/******************************************************************************
DEFINE VFS WRAPPER FUNCTIONS
******************************************************************************/
// These wrapper functions are used so that the FTP server can access the
// mounted FATFS devices directly without going through the costly mp_vfs_XXX
// functions. The latter may raise exceptions and we would then need to wrap
// all calls in an nlr handler. The wrapper functions below assume that there
// are only FATFS filesystems mounted.
STATIC FATFS *lookup_path(const TCHAR **path) {
mp_vfs_mount_t *fs = mp_vfs_lookup_path(*path, path);
if (fs == MP_VFS_NONE || fs == MP_VFS_ROOT) {
return NULL;
}
// here we assume that the mounted device is FATFS
return &((fs_user_mount_t*)MP_OBJ_TO_PTR(fs->obj))->fatfs;
}
STATIC FRESULT f_open_helper(FIL *fp, const TCHAR *path, BYTE mode) {
FATFS *fs = lookup_path(&path);
if (fs == NULL) {
return FR_NO_PATH;
}
return f_open(fs, fp, path, mode);
}
STATIC FRESULT f_opendir_helper(FF_DIR *dp, const TCHAR *path) {
FATFS *fs = lookup_path(&path);
if (fs == NULL) {
return FR_NO_PATH;
}
return f_opendir(fs, dp, path);
}
STATIC FRESULT f_stat_helper(const TCHAR *path, FILINFO *fno) {
FATFS *fs = lookup_path(&path);
if (fs == NULL) {
return FR_NO_PATH;
}
return f_stat(fs, path, fno);
}
STATIC FRESULT f_mkdir_helper(const TCHAR *path) {
FATFS *fs = lookup_path(&path);
if (fs == NULL) {
return FR_NO_PATH;
}
return f_mkdir(fs, path);
}
STATIC FRESULT f_unlink_helper(const TCHAR *path) {
FATFS *fs = lookup_path(&path);
if (fs == NULL) {
return FR_NO_PATH;
}
return f_unlink(fs, path);
}
STATIC FRESULT f_rename_helper(const TCHAR *path_old, const TCHAR *path_new) {
FATFS *fs_old = lookup_path(&path_old);
if (fs_old == NULL) {
return FR_NO_PATH;
}
FATFS *fs_new = lookup_path(&path_new);
if (fs_new == NULL) {
return FR_NO_PATH;
}
if (fs_old != fs_new) {
return FR_NO_PATH;
}
return f_rename(fs_new, path_old, path_new);
}
/******************************************************************************
DECLARE PRIVATE FUNCTIONS
******************************************************************************/
static void ftp_wait_for_enabled (void);
static bool ftp_create_listening_socket (_i16 *sd, _u16 port, _u8 backlog);
static ftp_result_t ftp_wait_for_connection (_i16 l_sd, _i16 *n_sd);
static ftp_result_t ftp_send_non_blocking (_i16 sd, void *data, _i16 Len);
static void ftp_send_reply (_u16 status, char *message);
static void ftp_send_data (_u32 datasize);
static void ftp_send_from_fifo (void);
static ftp_result_t ftp_recv_non_blocking (_i16 sd, void *buff, _i16 Maxlen, _i32 *rxLen);
static void ftp_process_cmd (void);
static void ftp_close_files (void);
static void ftp_close_filesystem_on_error (void);
static void ftp_close_cmd_data (void);
static ftp_cmd_index_t ftp_pop_command (char **str);
static void ftp_pop_param (char **str, char *param);
static int ftp_print_eplf_item (char *dest, uint32_t destsize, FILINFO *fno);
static int ftp_print_eplf_drive (char *dest, uint32_t destsize, const char *name);
static bool ftp_open_file (const char *path, int mode);
static ftp_result_t ftp_read_file (char *filebuf, uint32_t desiredsize, uint32_t *actualsize);
static ftp_result_t ftp_write_file (char *filebuf, uint32_t size);
static ftp_result_t ftp_open_dir_for_listing (const char *path);
static ftp_result_t ftp_list_dir (char *list, uint32_t maxlistsize, uint32_t *listsize);
static void ftp_open_child (char *pwd, char *dir);
static void ftp_close_child (char *pwd);
static void ftp_return_to_previous_path (char *pwd, char *dir);
/******************************************************************************
DEFINE PUBLIC FUNCTIONS
******************************************************************************/
void ftp_init (void) {
// Allocate memory for the data buffer, and the file system structs (from the RTOS heap)
ASSERT ((ftp_data.dBuffer = mem_Malloc(FTP_BUFFER_SIZE)) != NULL);
ASSERT ((ftp_path = mem_Malloc(FTP_MAX_PARAM_SIZE)) != NULL);
ASSERT ((ftp_scratch_buffer = mem_Malloc(FTP_MAX_PARAM_SIZE)) != NULL);
ASSERT ((ftp_cmd_buffer = mem_Malloc(FTP_MAX_PARAM_SIZE + FTP_CMD_SIZE_MAX)) != NULL);
SOCKETFIFO_Init (&ftp_socketfifo, (void *)ftp_fifoelements, FTP_SOCKETFIFO_ELEMENTS_MAX);
ftp_data.c_sd = -1;
ftp_data.d_sd = -1;
ftp_data.lc_sd = -1;
ftp_data.ld_sd = -1;
ftp_data.e_open = E_FTP_NOTHING_OPEN;
ftp_data.state = E_FTP_STE_DISABLED;
ftp_data.substate = E_FTP_STE_SUB_DISCONNECTED;
ftp_data.special_file = false;
ftp_data.volcount = 0;
}
void ftp_run (void) {
switch (ftp_data.state) {
case E_FTP_STE_DISABLED:
ftp_wait_for_enabled();
break;
case E_FTP_STE_START:
if (wlan_is_connected() && ftp_create_listening_socket(&ftp_data.lc_sd, FTP_CMD_PORT, FTP_CMD_CLIENTS_MAX - 1)) {
ftp_data.state = E_FTP_STE_READY;
}
break;
case E_FTP_STE_READY:
if (ftp_data.c_sd < 0 && ftp_data.substate == E_FTP_STE_SUB_DISCONNECTED) {
if (E_FTP_RESULT_OK == ftp_wait_for_connection(ftp_data.lc_sd, &ftp_data.c_sd)) {
ftp_data.txRetries = 0;
ftp_data.logginRetries = 0;
ftp_data.ctimeout = 0;
ftp_data.loggin.uservalid = false;
ftp_data.loggin.passvalid = false;
strcpy (ftp_path, "/");
ftp_send_reply (220, "MicroPython FTP Server");
break;
}
}
if (SOCKETFIFO_IsEmpty()) {
if (ftp_data.c_sd > 0 && ftp_data.substate != E_FTP_STE_SUB_LISTEN_FOR_DATA) {
ftp_process_cmd();
if (ftp_data.state != E_FTP_STE_READY) {
break;
}
}
}
break;
case E_FTP_STE_END_TRANSFER:
break;
case E_FTP_STE_CONTINUE_LISTING:
// go on with listing only if the transmit buffer is empty
if (SOCKETFIFO_IsEmpty()) {
uint32_t listsize;
ftp_list_dir((char *)ftp_data.dBuffer, FTP_BUFFER_SIZE, &listsize);
if (listsize > 0) {
ftp_send_data(listsize);
} else {
ftp_send_reply(226, NULL);
ftp_data.state = E_FTP_STE_END_TRANSFER;
}
ftp_data.ctimeout = 0;
}
break;
case E_FTP_STE_CONTINUE_FILE_TX:
// read the next block from the file only if the previous one has been sent
if (SOCKETFIFO_IsEmpty()) {
uint32_t readsize;
ftp_result_t result;
ftp_data.ctimeout = 0;
result = ftp_read_file ((char *)ftp_data.dBuffer, FTP_BUFFER_SIZE, &readsize);
if (result == E_FTP_RESULT_FAILED) {
ftp_send_reply(451, NULL);
ftp_data.state = E_FTP_STE_END_TRANSFER;
}
else {
if (readsize > 0) {
ftp_send_data(readsize);
}
if (result == E_FTP_RESULT_OK) {
ftp_send_reply(226, NULL);
ftp_data.state = E_FTP_STE_END_TRANSFER;
}
}
}
break;
case E_FTP_STE_CONTINUE_FILE_RX:
if (SOCKETFIFO_IsEmpty()) {
_i32 len;
ftp_result_t result;
if (E_FTP_RESULT_OK == (result = ftp_recv_non_blocking(ftp_data.d_sd, ftp_data.dBuffer, FTP_BUFFER_SIZE, &len))) {
ftp_data.dtimeout = 0;
ftp_data.ctimeout = 0;
// its a software update
if (ftp_data.special_file) {
if (updater_write(ftp_data.dBuffer, len)) {
break;
}
}
// user file being received
else if (E_FTP_RESULT_OK == ftp_write_file ((char *)ftp_data.dBuffer, len)) {
break;
}
ftp_send_reply(451, NULL);
ftp_data.state = E_FTP_STE_END_TRANSFER;
}
else if (result == E_FTP_RESULT_CONTINUE) {
if (ftp_data.dtimeout++ > FTP_DATA_TIMEOUT_MS / FTP_CYCLE_TIME_MS) {
ftp_close_files();
ftp_send_reply(426, NULL);
ftp_data.state = E_FTP_STE_END_TRANSFER;
}
}
else {
if (ftp_data.special_file) {
ftp_data.special_file = false;
updater_finnish();
}
ftp_close_files();
ftp_send_reply(226, NULL);
ftp_data.state = E_FTP_STE_END_TRANSFER;
}
}
break;
default:
break;
}
switch (ftp_data.substate) {
case E_FTP_STE_SUB_DISCONNECTED:
break;
case E_FTP_STE_SUB_LISTEN_FOR_DATA:
if (E_FTP_RESULT_OK == ftp_wait_for_connection(ftp_data.ld_sd, &ftp_data.d_sd)) {
ftp_data.dtimeout = 0;
ftp_data.substate = E_FTP_STE_SUB_DATA_CONNECTED;
}
else if (ftp_data.dtimeout++ > FTP_DATA_TIMEOUT_MS / FTP_CYCLE_TIME_MS) {
ftp_data.dtimeout = 0;
// close the listening socket
servers_close_socket(&ftp_data.ld_sd);
ftp_data.substate = E_FTP_STE_SUB_DISCONNECTED;
}
break;
case E_FTP_STE_SUB_DATA_CONNECTED:
if (ftp_data.state == E_FTP_STE_READY && ftp_data.dtimeout++ > FTP_DATA_TIMEOUT_MS / FTP_CYCLE_TIME_MS) {
// close the listening and the data socket
servers_close_socket(&ftp_data.ld_sd);
servers_close_socket(&ftp_data.d_sd);
ftp_close_filesystem_on_error ();
ftp_data.substate = E_FTP_STE_SUB_DISCONNECTED;
}
break;
default:
break;
}
// send data pending in the queue
ftp_send_from_fifo();
// check the state of the data sockets
if (ftp_data.d_sd < 0 && (ftp_data.state > E_FTP_STE_READY)) {
ftp_data.substate = E_FTP_STE_SUB_DISCONNECTED;
ftp_data.state = E_FTP_STE_READY;
}
}
void ftp_enable (void) {
ftp_data.enabled = true;
}
void ftp_disable (void) {
ftp_reset();
ftp_data.enabled = false;
ftp_data.state = E_FTP_STE_DISABLED;
}
void ftp_reset (void) {
// close all connections and start all over again
servers_close_socket(&ftp_data.lc_sd);
servers_close_socket(&ftp_data.ld_sd);
ftp_close_cmd_data();
ftp_data.state = E_FTP_STE_START;
ftp_data.substate = E_FTP_STE_SUB_DISCONNECTED;
ftp_data.volcount = 0;
SOCKETFIFO_Flush();
}
/******************************************************************************
DEFINE PRIVATE FUNCTIONS
******************************************************************************/
static void ftp_wait_for_enabled (void) {
// Check if the telnet service has been enabled
if (ftp_data.enabled) {
ftp_data.state = E_FTP_STE_START;
}
}
static bool ftp_create_listening_socket (_i16 *sd, _u16 port, _u8 backlog) {
SlSockNonblocking_t nonBlockingOption;
SlSockAddrIn_t sServerAddress;
_i16 _sd;
_i16 result;
// Open a socket for ftp data listen
ASSERT ((*sd = sl_Socket(SL_AF_INET, SL_SOCK_STREAM, SL_IPPROTO_IP)) > 0);
_sd = *sd;
if (_sd > 0) {
// add the new socket to the network administration
modusocket_socket_add(_sd, false);
// Enable non-blocking mode
nonBlockingOption.NonblockingEnabled = 1;
ASSERT ((result = sl_SetSockOpt(_sd, SL_SOL_SOCKET, SL_SO_NONBLOCKING, &nonBlockingOption, sizeof(nonBlockingOption))) == SL_SOC_OK);
// Bind the socket to a port number
sServerAddress.sin_family = SL_AF_INET;
sServerAddress.sin_addr.s_addr = SL_INADDR_ANY;
sServerAddress.sin_port = sl_Htons(port);
ASSERT ((result |= sl_Bind(_sd, (const SlSockAddr_t *)&sServerAddress, sizeof(sServerAddress))) == SL_SOC_OK);
// Start listening
ASSERT ((result |= sl_Listen (_sd, backlog)) == SL_SOC_OK);
if (result == SL_SOC_OK) {
return true;
}
servers_close_socket(sd);
}
return false;
}
static ftp_result_t ftp_wait_for_connection (_i16 l_sd, _i16 *n_sd) {
SlSockAddrIn_t sClientAddress;
SlSocklen_t in_addrSize;
// accepts a connection from a TCP client, if there is any, otherwise returns SL_EAGAIN
*n_sd = sl_Accept(l_sd, (SlSockAddr_t *)&sClientAddress, (SlSocklen_t *)&in_addrSize);
_i16 _sd = *n_sd;
if (_sd == SL_EAGAIN) {
return E_FTP_RESULT_CONTINUE;
}
else if (_sd < 0) {
// error
ftp_reset();
return E_FTP_RESULT_FAILED;
}
// add the new socket to the network administration
modusocket_socket_add(_sd, false);
// client connected, so go on
return E_FTP_RESULT_OK;
}
static ftp_result_t ftp_send_non_blocking (_i16 sd, void *data, _i16 Len) {
int16_t result = sl_Send(sd, data, Len, 0);
if (result > 0) {
ftp_data.txRetries = 0;
return E_FTP_RESULT_OK;
}
else if ((FTP_TX_RETRIES_MAX >= ++ftp_data.txRetries) && (result == SL_EAGAIN)) {
return E_FTP_RESULT_CONTINUE;
}
else {
// error
ftp_reset();
return E_FTP_RESULT_FAILED;
}
}
static void ftp_send_reply (_u16 status, char *message) {
SocketFifoElement_t fifoelement;
if (!message) {
message = "";
}
snprintf((char *)ftp_cmd_buffer, 4, "%u", status);
strcat ((char *)ftp_cmd_buffer, " ");
strcat ((char *)ftp_cmd_buffer, message);
strcat ((char *)ftp_cmd_buffer, "\r\n");
fifoelement.sd = &ftp_data.c_sd;
fifoelement.datasize = strlen((char *)ftp_cmd_buffer);
fifoelement.data = mem_Malloc(fifoelement.datasize);
if (status == 221) {
fifoelement.closesockets = E_FTP_CLOSE_CMD_AND_DATA;
}
else if (status == 426 || status == 451 || status == 550) {
fifoelement.closesockets = E_FTP_CLOSE_DATA;
}
else {
fifoelement.closesockets = E_FTP_CLOSE_NONE;
}
fifoelement.freedata = true;
if (fifoelement.data) {
memcpy (fifoelement.data, ftp_cmd_buffer, fifoelement.datasize);
if (!SOCKETFIFO_Push (&fifoelement)) {
mem_Free(fifoelement.data);
}
}
}
static void ftp_send_data (_u32 datasize) {
SocketFifoElement_t fifoelement;
fifoelement.data = ftp_data.dBuffer;
fifoelement.datasize = datasize;
fifoelement.sd = &ftp_data.d_sd;
fifoelement.closesockets = E_FTP_CLOSE_NONE;
fifoelement.freedata = false;
SOCKETFIFO_Push (&fifoelement);
}
static void ftp_send_from_fifo (void) {
SocketFifoElement_t fifoelement;
if (SOCKETFIFO_Peek (&fifoelement)) {
_i16 _sd = *fifoelement.sd;
if (_sd > 0) {
if (E_FTP_RESULT_OK == ftp_send_non_blocking (_sd, fifoelement.data, fifoelement.datasize)) {
SOCKETFIFO_Pop (&fifoelement);
if (fifoelement.closesockets != E_FTP_CLOSE_NONE) {
servers_close_socket(&ftp_data.d_sd);
if (fifoelement.closesockets == E_FTP_CLOSE_CMD_AND_DATA) {
servers_close_socket(&ftp_data.ld_sd);
// this one is the command socket
servers_close_socket(fifoelement.sd);
ftp_data.substate = E_FTP_STE_SUB_DISCONNECTED;
}
ftp_close_filesystem_on_error();
}
if (fifoelement.freedata) {
mem_Free(fifoelement.data);
}
}
}
// socket closed, remove from the queue
else {
SOCKETFIFO_Pop (&fifoelement);
if (fifoelement.freedata) {
mem_Free(fifoelement.data);
}
}
}
else if (ftp_data.state == E_FTP_STE_END_TRANSFER && (ftp_data.d_sd > 0)) {
// close the listening and the data sockets
servers_close_socket(&ftp_data.ld_sd);
servers_close_socket(&ftp_data.d_sd);
if (ftp_data.special_file) {
ftp_data.special_file = false;
}
}
}
static ftp_result_t ftp_recv_non_blocking (_i16 sd, void *buff, _i16 Maxlen, _i32 *rxLen) {
*rxLen = sl_Recv(sd, buff, Maxlen, 0);
if (*rxLen > 0) {
return E_FTP_RESULT_OK;
}
else if (*rxLen != SL_EAGAIN) {
// error
return E_FTP_RESULT_FAILED;
}
return E_FTP_RESULT_CONTINUE;
}
static void ftp_get_param_and_open_child (char **bufptr) {
ftp_pop_param (bufptr, ftp_scratch_buffer);
ftp_open_child (ftp_path, ftp_scratch_buffer);
ftp_data.closechild = true;
}
static void ftp_process_cmd (void) {
_i32 len;
char *bufptr = (char *)ftp_cmd_buffer;
ftp_result_t result;
FRESULT fres;
FILINFO fno;
ftp_data.closechild = false;
// also use the reply buffer to receive new commands
if (E_FTP_RESULT_OK == (result = ftp_recv_non_blocking(ftp_data.c_sd, ftp_cmd_buffer, FTP_MAX_PARAM_SIZE + FTP_CMD_SIZE_MAX, &len))) {
// bufptr is moved as commands are being popped
ftp_cmd_index_t cmd = ftp_pop_command(&bufptr);
if (!ftp_data.loggin.passvalid && (cmd != E_FTP_CMD_USER && cmd != E_FTP_CMD_PASS && cmd != E_FTP_CMD_QUIT)) {
ftp_send_reply(332, NULL);
return;
}
switch (cmd) {
case E_FTP_CMD_FEAT:
ftp_send_reply(211, "no-features");
break;
case E_FTP_CMD_SYST:
ftp_send_reply(215, "UNIX Type: L8");
break;
case E_FTP_CMD_CDUP:
ftp_close_child(ftp_path);
ftp_send_reply(250, NULL);
break;
case E_FTP_CMD_CWD:
{
fres = FR_NO_PATH;
ftp_pop_param (&bufptr, ftp_scratch_buffer);
ftp_open_child (ftp_path, ftp_scratch_buffer);
if ((ftp_path[0] == '/' && ftp_path[1] == '\0') || ((fres = f_opendir_helper (&ftp_data.dp, ftp_path)) == FR_OK)) {
if (fres == FR_OK) {
f_closedir(&ftp_data.dp);
}
ftp_send_reply(250, NULL);
}
else {
ftp_close_child (ftp_path);
ftp_send_reply(550, NULL);
}
}
break;
case E_FTP_CMD_PWD:
case E_FTP_CMD_XPWD:
ftp_send_reply(257, ftp_path);
break;
case E_FTP_CMD_SIZE:
{
ftp_get_param_and_open_child (&bufptr);
if (FR_OK == f_stat_helper(ftp_path, &fno)) {
// send the size
snprintf((char *)ftp_data.dBuffer, FTP_BUFFER_SIZE, "%u", (_u32)fno.fsize);
ftp_send_reply(213, (char *)ftp_data.dBuffer);
}
else {
ftp_send_reply(550, NULL);
}
}
break;
case E_FTP_CMD_MDTM:
ftp_get_param_and_open_child (&bufptr);
if (FR_OK == f_stat_helper(ftp_path, &fno)) {
// send the last modified time
snprintf((char *)ftp_data.dBuffer, FTP_BUFFER_SIZE, "%u%02u%02u%02u%02u%02u",
1980 + ((fno.fdate >> 9) & 0x7f), (fno.fdate >> 5) & 0x0f,
fno.fdate & 0x1f, (fno.ftime >> 11) & 0x1f,
(fno.ftime >> 5) & 0x3f, 2 * (fno.ftime & 0x1f));
ftp_send_reply(213, (char *)ftp_data.dBuffer);
}
else {
ftp_send_reply(550, NULL);
}
break;
case E_FTP_CMD_TYPE:
ftp_send_reply(200, NULL);
break;
case E_FTP_CMD_USER:
ftp_pop_param (&bufptr, ftp_scratch_buffer);
if (!memcmp(ftp_scratch_buffer, servers_user, MAX(strlen(ftp_scratch_buffer), strlen(servers_user)))) {
ftp_data.loggin.uservalid = true && (strlen(servers_user) == strlen(ftp_scratch_buffer));
}
ftp_send_reply(331, NULL);
break;
case E_FTP_CMD_PASS:
ftp_pop_param (&bufptr, ftp_scratch_buffer);
if (!memcmp(ftp_scratch_buffer, servers_pass, MAX(strlen(ftp_scratch_buffer), strlen(servers_pass))) &&
ftp_data.loggin.uservalid) {
ftp_data.loggin.passvalid = true && (strlen(servers_pass) == strlen(ftp_scratch_buffer));
if (ftp_data.loggin.passvalid) {
ftp_send_reply(230, NULL);
break;
}
}
ftp_send_reply(530, NULL);
break;
case E_FTP_CMD_PASV:
{
// some servers (e.g. google chrome) send PASV several times very quickly
servers_close_socket(&ftp_data.d_sd);
ftp_data.substate = E_FTP_STE_SUB_DISCONNECTED;
bool socketcreated = true;
if (ftp_data.ld_sd < 0) {
socketcreated = ftp_create_listening_socket(&ftp_data.ld_sd, FTP_PASIVE_DATA_PORT, FTP_DATA_CLIENTS_MAX - 1);
}
if (socketcreated) {
uint32_t ip;
uint8_t *pip = (uint8_t *)&ip;
ftp_data.dtimeout = 0;
wlan_get_ip(&ip);
snprintf((char *)ftp_data.dBuffer, FTP_BUFFER_SIZE, "(%u,%u,%u,%u,%u,%u)",
pip[3], pip[2], pip[1], pip[0], (FTP_PASIVE_DATA_PORT >> 8), (FTP_PASIVE_DATA_PORT & 0xFF));
ftp_data.substate = E_FTP_STE_SUB_LISTEN_FOR_DATA;
ftp_send_reply(227, (char *)ftp_data.dBuffer);
}
else {
ftp_send_reply(425, NULL);
}
}
break;
case E_FTP_CMD_LIST:
if (ftp_open_dir_for_listing(ftp_path) == E_FTP_RESULT_CONTINUE) {
ftp_data.state = E_FTP_STE_CONTINUE_LISTING;
ftp_send_reply(150, NULL);
}
else {
ftp_send_reply(550, NULL);
}
break;
case E_FTP_CMD_RETR:
ftp_get_param_and_open_child (&bufptr);
if (ftp_open_file (ftp_path, FA_READ)) {
ftp_data.state = E_FTP_STE_CONTINUE_FILE_TX;
ftp_send_reply(150, NULL);
}
else {
ftp_data.state = E_FTP_STE_END_TRANSFER;
ftp_send_reply(550, NULL);
}
break;
case E_FTP_CMD_STOR:
ftp_get_param_and_open_child (&bufptr);
// first check if a software update is being requested
if (updater_check_path (ftp_path)) {
if (updater_start()) {
ftp_data.special_file = true;
ftp_data.state = E_FTP_STE_CONTINUE_FILE_RX;
ftp_send_reply(150, NULL);
}
else {
// to unlock the updater
updater_finnish();
ftp_data.state = E_FTP_STE_END_TRANSFER;
ftp_send_reply(550, NULL);
}
}
else {
if (ftp_open_file (ftp_path, FA_WRITE | FA_CREATE_ALWAYS)) {
ftp_data.state = E_FTP_STE_CONTINUE_FILE_RX;
ftp_send_reply(150, NULL);
}
else {
ftp_data.state = E_FTP_STE_END_TRANSFER;
ftp_send_reply(550, NULL);
}
}
break;
case E_FTP_CMD_DELE:
case E_FTP_CMD_RMD:
ftp_get_param_and_open_child (&bufptr);
if (FR_OK == f_unlink_helper(ftp_path)) {
ftp_send_reply(250, NULL);
}
else {
ftp_send_reply(550, NULL);
}
break;
case E_FTP_CMD_MKD:
ftp_get_param_and_open_child (&bufptr);
if (FR_OK == f_mkdir_helper(ftp_path)) {
ftp_send_reply(250, NULL);
}
else {
ftp_send_reply(550, NULL);
}
break;
case E_FTP_CMD_RNFR:
ftp_get_param_and_open_child (&bufptr);
if (FR_OK == f_stat_helper(ftp_path, &fno)) {
ftp_send_reply(350, NULL);
// save the current path
strcpy ((char *)ftp_data.dBuffer, ftp_path);
}
else {
ftp_send_reply(550, NULL);
}
break;
case E_FTP_CMD_RNTO:
ftp_get_param_and_open_child (&bufptr);
// old path was saved in the data buffer
if (FR_OK == (fres = f_rename_helper((char *)ftp_data.dBuffer, ftp_path))) {
ftp_send_reply(250, NULL);
}
else {
ftp_send_reply(550, NULL);
}
break;
case E_FTP_CMD_NOOP:
ftp_send_reply(200, NULL);
break;
case E_FTP_CMD_QUIT:
ftp_send_reply(221, NULL);
break;
default:
// command not implemented
ftp_send_reply(502, NULL);
break;
}
if (ftp_data.closechild) {
ftp_return_to_previous_path(ftp_path, ftp_scratch_buffer);
}
}
else if (result == E_FTP_RESULT_CONTINUE) {
if (ftp_data.ctimeout++ > (servers_get_timeout() / FTP_CYCLE_TIME_MS)) {
ftp_send_reply(221, NULL);
}
}
else {
ftp_close_cmd_data ();
}
}
static void ftp_close_files (void) {
if (ftp_data.e_open == E_FTP_FILE_OPEN) {
f_close(&ftp_data.fp);
}
else if (ftp_data.e_open == E_FTP_DIR_OPEN) {
f_closedir(&ftp_data.dp);
}
ftp_data.e_open = E_FTP_NOTHING_OPEN;
}
static void ftp_close_filesystem_on_error (void) {
ftp_close_files();
if (ftp_data.special_file) {
updater_finnish ();
ftp_data.special_file = false;
}
}
static void ftp_close_cmd_data (void) {
servers_close_socket(&ftp_data.c_sd);
servers_close_socket(&ftp_data.d_sd);
ftp_close_filesystem_on_error ();
}
static void stoupper (char *str) {
while (str && *str != '\0') {
*str = (char)unichar_toupper((int)(*str));
str++;
}
}
static ftp_cmd_index_t ftp_pop_command (char **str) {
char _cmd[FTP_CMD_SIZE_MAX];
ftp_pop_param (str, _cmd);
stoupper (_cmd);
for (ftp_cmd_index_t i = 0; i < E_FTP_NUM_FTP_CMDS; i++) {
if (!strcmp (_cmd, ftp_cmd_table[i].cmd)) {
// move one step further to skip the space
(*str)++;
return i;
}
}
return E_FTP_CMD_NOT_SUPPORTED;
}
static void ftp_pop_param (char **str, char *param) {
while (**str != ' ' && **str != '\r' && **str != '\n' && **str != '\0') {
*param++ = **str;
(*str)++;
}
*param = '\0';
}
static int ftp_print_eplf_item (char *dest, uint32_t destsize, FILINFO *fno) {
char *type = (fno->fattrib & AM_DIR) ? "d" : "-";
uint32_t tseconds;
uint mindex = (((fno->fdate >> 5) & 0x0f) > 0) ? (((fno->fdate >> 5) & 0x0f) - 1) : 0;
uint day = ((fno->fdate & 0x1f) > 0) ? (fno->fdate & 0x1f) : 1;
uint fseconds = timeutils_seconds_since_2000(1980 + ((fno->fdate >> 9) & 0x7f),
(fno->fdate >> 5) & 0x0f,
fno->fdate & 0x1f,
(fno->ftime >> 11) & 0x1f,
(fno->ftime >> 5) & 0x3f,
2 * (fno->ftime & 0x1f));
tseconds = pyb_rtc_get_seconds();
if (FTP_UNIX_SECONDS_180_DAYS < tseconds - fseconds) {
return snprintf(dest, destsize, "%srw-rw-r-- 1 root root %9u %s %2u %5u %s\r\n",
type, (_u32)fno->fsize, ftp_month[mindex].month, day,
1980 + ((fno->fdate >> 9) & 0x7f), fno->fname);
}
else {
return snprintf(dest, destsize, "%srw-rw-r-- 1 root root %9u %s %2u %02u:%02u %s\r\n",
type, (_u32)fno->fsize, ftp_month[mindex].month, day,
(fno->ftime >> 11) & 0x1f, (fno->ftime >> 5) & 0x3f, fno->fname);
}
}
static int ftp_print_eplf_drive (char *dest, uint32_t destsize, const char *name) {
timeutils_struct_time_t tm;
uint32_t tseconds;
char *type = "d";
timeutils_seconds_since_2000_to_struct_time((FTP_UNIX_TIME_20150101 - FTP_UNIX_TIME_20000101), &tm);
tseconds = pyb_rtc_get_seconds();
if (FTP_UNIX_SECONDS_180_DAYS < tseconds - (FTP_UNIX_TIME_20150101 - FTP_UNIX_TIME_20000101)) {
return snprintf(dest, destsize, "%srw-rw-r-- 1 root root %9u %s %2u %5u %s\r\n",
type, 0, ftp_month[(tm.tm_mon - 1)].month, tm.tm_mday, tm.tm_year, name);
}
else {
return snprintf(dest, destsize, "%srw-rw-r-- 1 root root %9u %s %2u %02u:%02u %s\r\n",
type, 0, ftp_month[(tm.tm_mon - 1)].month, tm.tm_mday, tm.tm_hour, tm.tm_min, name);
}
}
static bool ftp_open_file (const char *path, int mode) {
FRESULT res = f_open_helper(&ftp_data.fp, path, mode);
if (res != FR_OK) {
return false;
}
ftp_data.e_open = E_FTP_FILE_OPEN;
return true;
}
static ftp_result_t ftp_read_file (char *filebuf, uint32_t desiredsize, uint32_t *actualsize) {
ftp_result_t result = E_FTP_RESULT_CONTINUE;
FRESULT res = f_read(&ftp_data.fp, filebuf, desiredsize, (UINT *)actualsize);
if (res != FR_OK) {
ftp_close_files();
result = E_FTP_RESULT_FAILED;
*actualsize = 0;
}
else if (*actualsize < desiredsize) {
ftp_close_files();
result = E_FTP_RESULT_OK;
}
return result;
}
static ftp_result_t ftp_write_file (char *filebuf, uint32_t size) {
ftp_result_t result = E_FTP_RESULT_FAILED;
uint32_t actualsize;
FRESULT res = f_write(&ftp_data.fp, filebuf, size, (UINT *)&actualsize);
if ((actualsize == size) && (FR_OK == res)) {
result = E_FTP_RESULT_OK;
}
else {
ftp_close_files();
}
return result;
}
static ftp_result_t ftp_open_dir_for_listing (const char *path) {
// "hack" to detect the root directory
if (path[0] == '/' && path[1] == '\0') {
ftp_data.listroot = true;
} else {
FRESULT res;
res = f_opendir_helper(&ftp_data.dp, path); /* Open the directory */
if (res != FR_OK) {
return E_FTP_RESULT_FAILED;
}
ftp_data.e_open = E_FTP_DIR_OPEN;
ftp_data.listroot = false;
}
return E_FTP_RESULT_CONTINUE;
}
static ftp_result_t ftp_list_dir (char *list, uint32_t maxlistsize, uint32_t *listsize) {
uint next = 0;
uint listcount = 0;
FRESULT res;
ftp_result_t result = E_FTP_RESULT_CONTINUE;
FILINFO fno;
#if _USE_LFN
// read up to 2 directory items
while (listcount < 2) {
#else
// read up to 4 directory items
while (listcount < 4) {
#endif
if (ftp_data.listroot) {
// root directory "hack"
mp_vfs_mount_t *vfs = MP_STATE_VM(vfs_mount_table);
int i = ftp_data.volcount;
while (vfs != NULL && i != 0) {
vfs = vfs->next;
i -= 1;
}
if (vfs == NULL) {
if (!next) {
// no volume found this time, we are done
ftp_data.volcount = 0;
}
break;
} else {
next += ftp_print_eplf_drive((list + next), (maxlistsize - next), vfs->str + 1);
}
ftp_data.volcount++;
} else {
// a "normal" directory
res = f_readdir(&ftp_data.dp, &fno); /* Read a directory item */
if (res != FR_OK || fno.fname[0] == 0) {
result = E_FTP_RESULT_OK;
break; /* Break on error or end of dp */
}
if (fno.fname[0] == '.' && fno.fname[1] == 0) continue; /* Ignore . entry */
if (fno.fname[0] == '.' && fno.fname[1] == '.' && fno.fname[2] == 0) continue; /* Ignore .. entry */
// add the entry to the list
next += ftp_print_eplf_item((list + next), (maxlistsize - next), &fno);
}
listcount++;
}
if (result == E_FTP_RESULT_OK) {
ftp_close_files();
}
*listsize = next;
return result;
}
static void ftp_open_child (char *pwd, char *dir) {
if (dir[0] == '/') {
strcpy (pwd, dir);
} else {
if (strlen(pwd) > 1) {
strcat (pwd, "/");
}
strcat (pwd, dir);
}
uint len = strlen(pwd);
if ((len > 1) && (pwd[len - 1] == '/')) {
pwd[len - 1] = '\0';
}
}
static void ftp_close_child (char *pwd) {
uint len = strlen(pwd);
while (len && (pwd[len] != '/')) {
len--;
}
if (len == 0) {
strcpy (pwd, "/");
} else {
pwd[len] = '\0';
}
}
static void ftp_return_to_previous_path (char *pwd, char *dir) {
uint newlen = strlen(pwd) - strlen(dir);
if ((newlen > 2) && (pwd[newlen - 1] == '/')) {
pwd[newlen - 1] = '\0';
}
else {
if (newlen == 0) {
strcpy (pwd, "/");
} else {
pwd[newlen] = '\0';
}
}
}
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