mirror of https://github.com/arendst/Tasmota.git
361 lines
13 KiB
C++
361 lines
13 KiB
C++
/*
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xdrv_02_mqtt_1_file.ino - mqtt file support for Tasmota
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Copyright (C) 2021 Theo Arends
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define USE_MQTT_FILE
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#ifdef USE_MQTT_FILE
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/*********************************************************************************************\
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* MQTT file transfer
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*
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* Supports both binary and base64 encoded binary data transfer
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\*********************************************************************************************/
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#include <PubSubClient.h>
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#include <base64.hpp>
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extern PubSubClient MqttClient;
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struct FMQTT {
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uint32_t file_pos = 0; // MQTT file position during upload/download
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uint32_t file_size = 0; // MQTT total file size
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uint32_t file_type = 0; // MQTT File type (See UploadTypes)
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uint8_t* file_buffer = nullptr; // MQTT file buffer
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const char* file_password = nullptr; // MQTT password
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MD5Builder md5; // MQTT md5
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String file_md5; // MQTT received file md5 (32 chars)
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uint16_t topic_size; // MQTT topic length with terminating <null>
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uint8_t file_id = 0; // MQTT unique file id during upload/download
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} FMqtt;
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/*
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The download chunk size is the data size before it is encoded to base64.
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It is smaller than the upload chunksize as it is bound by MESSZ
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The download buffer with length MESSZ (1042) contains
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- Payload ({"Id":117,"Data":"<base64 encoded mqtt_file_chuck_size>"}<null>)
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*/
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const uint32_t FileTransferHeaderSize = 21; // {"Id":116,"Data":""}<null>
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const uint32_t mqtt_file_chuck_size = (((MESSZ - FileTransferHeaderSize) / 4) * 3) -2;
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uint32_t FileUploadChunckSize(void) {
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/*
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The upload chunk size is the data size of the payload.
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It can be larger than the download chunksize which is bound by MESSZ
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The PubSubClient upload buffer with length MQTT_MAX_PACKET_SIZE (1200) contains
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- Header of 5 bytes (MQTT_MAX_HEADER_SIZE)
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- Topic string terminated with a zero (stat/demo/FILEUPLOAD<null>)
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- Payload ({"Id":116,"Data":"<base64 encoded FileUploadChunckSize>"}<null>) or (<binary data>)
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*/
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const uint32_t PubSubClientHeaderSize = 5; // MQTT_MAX_HEADER_SIZE
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return MqttClient.getBufferSize() - PubSubClientHeaderSize - FMqtt.topic_size -1;
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}
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uint32_t MqttFileUploadValidate(uint32_t rcv_id) {
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if (XdrvMailbox.grpflg) { return 5; }
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if ((0 == FMqtt.file_id) && (rcv_id > 0) && (FMqtt.file_size > 0) && (FMqtt.file_type > 0)) {
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FMqtt.file_buffer = nullptr; // Init upload buffer
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if (!FMqtt.file_password || (strcmp(FMqtt.file_password, SettingsText(SET_MQTT_PWD)) != 0)) {
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return 1; // Invalid password
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}
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// Check buffer size
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if (UPL_SETTINGS == FMqtt.file_type) {
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if (FMqtt.file_size > 4096) {
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return 2; // Settings supports max 4k size
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}
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} else { // Check enough flash space for intermediate upload
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uint32_t head_room = (FlashWriteMaxSector() - FlashWriteStartSector()) * SPI_FLASH_SEC_SIZE;
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uint32_t rounded_size = (FMqtt.file_size + SPI_FLASH_SEC_SIZE -1) & (~(SPI_FLASH_SEC_SIZE - 1));
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if (rounded_size > head_room) {
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return 2; // Not enough space
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}
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}
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// Init file_buffer
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if (UPL_TASMOTA == FMqtt.file_type) {
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if (Update.begin(FMqtt.file_size)) {
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FMqtt.file_buffer = &FMqtt.file_id; // Dummy buffer
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// TasmotaGlobal.blinkstate = true; // Stay lit
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SettingsSave(1); // Free flash for OTA update
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}
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}
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else if (UPL_SETTINGS == FMqtt.file_type) {
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if (SettingsConfigBackup()) {
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FMqtt.file_buffer = settings_buffer;
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}
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}
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else {
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return 3; // Invalid file type
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}
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FMqtt.file_id = rcv_id;
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FMqtt.file_pos = 0;
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FMqtt.md5 = MD5Builder();
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FMqtt.md5.begin();
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ResponseCmndChar(PSTR(D_JSON_STARTED));
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MqttPublishPrefixTopic_P(STAT, XdrvMailbox.command); // Enforce stat/wemos10/FILEUPLOAD
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}
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else if ((FMqtt.file_id > 0) && (FMqtt.file_id != rcv_id)) {
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// Error receiving data
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if (UPL_TASMOTA == FMqtt.file_type) {
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Update.end(true);
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}
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else if (UPL_SETTINGS == FMqtt.file_type) {
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SettingsBufferFree();
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}
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return 4; // Upload aborted
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}
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return 0; // No error
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}
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void CmndFileUpload(void) {
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/*
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Upload <MaxSize> bytes chunks of data either base64 encoded or binary with MD5 hash
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Supported Type:
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1 - OTA firmware
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2 - Settings
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FileUpload 0 - Abort current upload
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Start an upload session:
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FileUpload {"Password":"","File":"Config_wemos10_9.4.0.3.dmp","Id":116,"Type":2,"Size":4096}
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Upload data using base64:
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FileUpload {"Id":116,"Data":"CRJcTQ9fYGF ... OT1BRUlNUVVZXWFk="}
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FileUpload {"Id":116,"Data":" ... "}
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Or binary:
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FileUpload201 <binary data>
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Finish upload session:
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FileUpload {"Id":116,"Md5":"496fcbb433bbca89833063174d2c5747"}
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*/
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const char* base64_data = nullptr;
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uint32_t rcv_id = 0;
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char* dataBuf = (char*)XdrvMailbox.data;
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bool binary_data = (XdrvMailbox.index > 199); // Check for raw data
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if (!binary_data) {
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if (strlen(dataBuf) > 8) { // Workaround exception if empty JSON like {} - Needs checks
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JsonParser parser((char*) dataBuf);
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JsonParserObject root = parser.getRootObject();
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if (root) {
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JsonParserToken val = root[PSTR("ID")];
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if (val) { rcv_id = val.getUInt(); }
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val = root[PSTR("TYPE")];
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if (val) { FMqtt.file_type = val.getUInt(); }
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val = root[PSTR("SIZE")];
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if (val) { FMqtt.file_size = val.getUInt(); }
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val = root[PSTR("MD5")];
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if (val) { FMqtt.file_md5 = val.getStr(); }
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val = root[PSTR("DATA")];
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if (val) { base64_data = val.getStr(); }
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val = root[PSTR("PASSWORD")];
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if (val) { FMqtt.file_password = val.getStr(); }
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}
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}
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} else {
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rcv_id = FMqtt.file_id;
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}
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uint32_t error = MqttFileUploadValidate(rcv_id);
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if (error) {
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FMqtt.file_buffer = nullptr;
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TasmotaGlobal.masterlog_level = LOG_LEVEL_NONE; // Enable logging
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char error_txt[20];
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snprintf_P(error_txt, sizeof(error_txt), PSTR(D_JSON_ERROR " %d"), error);
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ResponseCmndChar(error_txt);
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}
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if (FMqtt.file_buffer) {
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if ((FMqtt.file_pos < FMqtt.file_size) && (binary_data || base64_data)) {
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// Save upload into buffer - Handle possible buffer overflows
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unsigned char* raw_data = (unsigned char*)XdrvMailbox.data;
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uint32_t rcvd_bytes = XdrvMailbox.data_len;
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if (!binary_data) {
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raw_data = (unsigned char*)malloc(XdrvMailbox.data_len);
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if (raw_data) {
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rcvd_bytes = decode_base64((unsigned char*)base64_data, (unsigned char*)raw_data);
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}
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}
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if (raw_data) {
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uint32_t bytes_left = FMqtt.file_size - FMqtt.file_pos;
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uint32_t read_bytes = (bytes_left < rcvd_bytes) ? bytes_left : rcvd_bytes;
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FMqtt.md5.add(raw_data, read_bytes);
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if (UPL_TASMOTA == FMqtt.file_type) {
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Update.write(raw_data, read_bytes);
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} else {
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uint8_t* buffer = FMqtt.file_buffer + FMqtt.file_pos;
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memcpy(buffer, raw_data, read_bytes);
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}
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if (!binary_data) {
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free(raw_data);
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}
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FMqtt.file_pos += read_bytes;
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}
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if ((FMqtt.file_pos > rcvd_bytes) && ((FMqtt.file_pos % 102400) <= rcvd_bytes)) {
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TasmotaGlobal.masterlog_level = LOG_LEVEL_NONE; // Enable logging
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AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_UPLOAD "Progress %d kB"), (FMqtt.file_pos / 10240) * 10);
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TasmotaGlobal.masterlog_level = LOG_LEVEL_DEBUG_MORE; // Hide upload data logging
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}
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}
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if ((FMqtt.file_pos < FMqtt.file_size) || (FMqtt.file_md5.length() != 32)) {
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TasmotaGlobal.masterlog_level = LOG_LEVEL_DEBUG_MORE; // Hide upload data logging
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uint32_t chunk_size = FileUploadChunckSize();
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if (!binary_data) {
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chunk_size = (((chunk_size - FileTransferHeaderSize) / 4) * 3) -2; // Calculate base64 chunk size
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}
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// {"Id":116,"MaxSize":"765"}
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Response_P(PSTR("{\"Id\":%d,\"MaxSize\":%d}"), FMqtt.file_id, chunk_size);
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} else {
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FMqtt.md5.calculate();
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if (strcasecmp(FMqtt.file_md5.c_str(), FMqtt.md5.toString().c_str())) {
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ResponseCmndChar(PSTR(D_JSON_MD5_MISMATCH));
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} else {
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// Process upload data en free buffer
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ResponseCmndDone();
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if (UPL_TASMOTA == FMqtt.file_type) {
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if (!Update.end(true)) {
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ResponseCmndFailed();
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} else {
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TasmotaGlobal.restart_flag = 2; // Always restart to re-enable disabled features during update
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}
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}
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else if (UPL_SETTINGS == FMqtt.file_type) {
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if (!SettingsConfigRestore()) {
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ResponseCmndFailed();
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} else {
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TasmotaGlobal.restart_flag = 2; // Always restart to re-enable disabled features during update
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}
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}
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}
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FMqtt.file_buffer = nullptr;
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}
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}
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if (!FMqtt.file_buffer) {
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TasmotaGlobal.masterlog_level = LOG_LEVEL_NONE; // Enable logging
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FMqtt.file_id = 0;
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FMqtt.file_size = 0;
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FMqtt.file_type = 0;
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FMqtt.file_md5 = (const char*) nullptr; // Force deallocation of the String internal memory
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FMqtt.file_password = nullptr;
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}
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MqttPublishPrefixTopic_P(STAT, XdrvMailbox.command); // Enforce stat/wemos10/FILEUPLOAD
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ResponseClear();
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}
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void CmndFileDownload(void) {
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/*
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Download (binary) max 700 bytes chunks of data base64 encoded with MD5 hash over base64 decoded data
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Currently supports Settings (file type 2)
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Filedownload 0 - Abort current download
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FileDownload 2 - Start download of settings file
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FileDownload - Continue downloading data until reception of MD5 hash
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*/
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if (XdrvMailbox.grpflg) { return; }
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if (FMqtt.file_id && FMqtt.file_buffer) {
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bool finished = false;
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if (0 == XdrvMailbox.payload) { // Abort file download
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ResponseCmndChar(PSTR(D_JSON_ABORTED));
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finished = true;
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}
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else if (FMqtt.file_pos < FMqtt.file_size) {
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uint32_t bytes_left = FMqtt.file_size - FMqtt.file_pos;
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uint32_t write_bytes = (bytes_left < mqtt_file_chuck_size) ? bytes_left : mqtt_file_chuck_size;
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uint8_t* buffer = FMqtt.file_buffer + FMqtt.file_pos;
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FMqtt.md5.add(buffer, write_bytes);
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// {"Id":117,"Data":"CRJcTQ9fYGF ... OT1BRUlNUVVZXWFk="}
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Response_P(PSTR("{\"Id\":%d,\"Data\":\""), FMqtt.file_id); // FileTransferHeaderSize
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char base64_data[encode_base64_length(write_bytes)];
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encode_base64((unsigned char*)buffer, write_bytes, (unsigned char*)base64_data);
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ResponseAppend_P(base64_data);
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ResponseAppend_P("\"}");
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FMqtt.file_pos += write_bytes;
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} else {
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FMqtt.md5.calculate();
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// {"Id":117,"Md5":"496fcbb433bbca89833063174d2c5747"}
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Response_P(PSTR("{\"Id\":%d,\"Md5\":\"%s\"}"), FMqtt.file_id, FMqtt.md5.toString().c_str());
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finished = true;
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}
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if (finished) {
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if (UPL_SETTINGS == FMqtt.file_type) {
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SettingsBufferFree();
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}
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FMqtt.file_id = 0;
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}
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}
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else if (XdrvMailbox.data_len) {
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FMqtt.file_buffer = nullptr;
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FMqtt.file_id = (UtcTime() & 0xFE) +1; // Odd id between 1 and 255
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if (UPL_SETTINGS == XdrvMailbox.payload) {
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uint32_t len = SettingsConfigBackup();
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if (len) {
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FMqtt.file_type = UPL_SETTINGS;
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FMqtt.file_buffer = settings_buffer;
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FMqtt.file_size = len;
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// {"File":"Config_wemos10_9.4.0.3.dmp","Id":117,"Type":2,"Size":4096}
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Response_P(PSTR("{\"File\":\"%s\",\"Id\":%d,\"Type\":%d,\"Size\":%d}"),
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SettingsConfigFilename().c_str(), FMqtt.file_id, FMqtt.file_type, len);
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}
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}
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if (FMqtt.file_buffer) {
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FMqtt.file_pos = 0;
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FMqtt.md5 = MD5Builder();
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FMqtt.md5.begin();
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} else {
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FMqtt.file_id = 0;
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ResponseCmndFailed();
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}
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}
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MqttPublishPrefixTopic_P(STAT, XdrvMailbox.command);
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ResponseClear();
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}
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#endif // USE_MQTT_FILE
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