/* * This file is part of the Micro Python 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 #include #include "std.h" #include "py/mpstate.h" #include "py/obj.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 "timeutils.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; sockaddr_in sServerAddress; _i16 _sd; _i16 result; // Open a socket for ftp data listen ASSERT ((*sd = sl_Socket(AF_INET, SOCK_STREAM, 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, SOL_SOCKET, SL_SO_NONBLOCKING, &nonBlockingOption, sizeof(nonBlockingOption))) == SL_SOC_OK); // Bind the socket to a port number sServerAddress.sin_family = AF_INET; sServerAddress.sin_addr.s_addr = INADDR_ANY; sServerAddress.sin_port = 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) { sockaddr_in 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 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'; } } }