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Tasmota/tasmota/xdrv_02_mqtt_9_impl.ino

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/*
xdrv_02_mqtt.ino - mqtt support for Tasmota
Copyright (C) 2021 Theo Arends
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define XDRV_02 2
#ifndef MQTT_WIFI_CLIENT_TIMEOUT
#define MQTT_WIFI_CLIENT_TIMEOUT 200 // Wifi TCP connection timeout (default is 5000 mSec)
#endif
#define USE_MQTT_NEW_PUBSUBCLIENT
// #define DEBUG_DUMP_TLS // allow dumping of TLS Flash keys
#ifdef USE_MQTT_TLS
#include "WiFiClientSecureLightBearSSL.h"
BearSSL::WiFiClientSecure_light *tlsClient;
#endif
WiFiClient EspClient; // Wifi Client - non-TLS
#ifdef USE_MQTT_AZURE_IOT
#undef MQTT_PORT
#define MQTT_PORT 8883
#if defined(USE_MQTT_AZURE_DPS_SCOPEID) && defined(USE_MQTT_AZURE_DPS_PRESHAREDKEY)
#include <ESP8266HTTPClient.h>
// dedicated tlsHttpsClient for DPS as the 'tlsClient' above causes error '-1' in httpsClient after it is associated with PubSub. It cost ~5K of heap
BearSSL::WiFiClientSecure_light *tlsHttpsClient = new BearSSL::WiFiClientSecure_light(1024,1024);
HTTPClient httpsClient;
int httpsClientReturn;
#endif // USE_MQTT_AZURE_DPS_SCOPEID
#include <base64.hpp>
#include <t_bearssl.h>
#include <JsonParser.h>
#endif // USE_MQTT_AZURE_IOT
const char kMqttCommands[] PROGMEM = "|" // No prefix
// SetOption synonyms
D_SO_MQTTJSONONLY "|"
#ifdef USE_MQTT_TLS
D_SO_MQTTTLS "|"
#endif
D_SO_MQTTNORETAIN "|" D_SO_MQTTDETACHRELAY "|"
// regular commands
#if defined(USE_MQTT_TLS) && !defined(USE_MQTT_TLS_CA_CERT)
D_CMND_MQTTFINGERPRINT "|"
#endif
D_CMND_MQTTUSER "|" D_CMND_MQTTPASSWORD "|" D_CMND_MQTTKEEPALIVE "|" D_CMND_MQTTTIMEOUT "|"
#if defined(USE_MQTT_TLS) && defined(USE_MQTT_AWS_IOT)
D_CMND_TLSKEY "|"
#endif
#ifdef USE_MQTT_FILE
D_CMND_FILEUPLOAD "|" D_CMND_FILEDOWNLOAD "|"
#endif // USE_MQTT_FILE
D_CMND_MQTTHOST "|" D_CMND_MQTTPORT "|" D_CMND_MQTTRETRY "|" D_CMND_STATETEXT "|" D_CMND_MQTTCLIENT "|"
D_CMND_FULLTOPIC "|" D_CMND_PREFIX "|" D_CMND_GROUPTOPIC "|" D_CMND_TOPIC "|" D_CMND_PUBLISH "|" D_CMND_MQTTLOG "|"
D_CMND_BUTTONTOPIC "|" D_CMND_SWITCHTOPIC "|" D_CMND_BUTTONRETAIN "|" D_CMND_SWITCHRETAIN "|" D_CMND_POWERRETAIN "|"
D_CMND_SENSORRETAIN "|" D_CMND_INFORETAIN "|" D_CMND_STATERETAIN ;
SO_SYNONYMS(kMqttSynonyms,
90,
#ifdef USE_MQTT_TLS
103,
#endif
104, 114
);
// const uint8_t kMqttSynonyms[] PROGMEM = {
// 4, // number of synonyms
// 90, 103, 104, 114,
// };
void (* const MqttCommand[])(void) PROGMEM = {
#if defined(USE_MQTT_TLS) && !defined(USE_MQTT_TLS_CA_CERT)
&CmndMqttFingerprint,
#endif
&CmndMqttUser, &CmndMqttPassword, &CmndMqttKeepAlive, &CmndMqttTimeout,
#if defined(USE_MQTT_TLS) && defined(USE_MQTT_AWS_IOT)
&CmndTlsKey,
#endif
#ifdef USE_MQTT_FILE
&CmndFileUpload, &CmndFileDownload,
#endif // USE_MQTT_FILE
&CmndMqttHost, &CmndMqttPort, &CmndMqttRetry, &CmndStateText, &CmndMqttClient,
&CmndFullTopic, &CmndPrefix, &CmndGroupTopic, &CmndTopic, &CmndPublish, &CmndMqttlog,
&CmndButtonTopic, &CmndSwitchTopic, &CmndButtonRetain, &CmndSwitchRetain, &CmndPowerRetain, &CmndSensorRetain,
&CmndInfoRetain, &CmndStateRetain };
struct MQTT {
uint16_t connect_count = 0; // MQTT re-connect count
uint16_t retry_counter = 1; // MQTT connection retry counter
uint16_t retry_counter_delay = 1; // MQTT retry counter multiplier
uint8_t initial_connection_state = 2; // MQTT connection messages state
bool connected = false; // MQTT virtual connection status
bool allowed = false; // MQTT enabled and parameters valid
bool mqtt_tls = false; // MQTT TLS is enabled
} Mqtt;
#ifdef USE_MQTT_TLS
// This part of code is necessary to store Private Key and Cert in Flash
#ifdef USE_MQTT_AWS_IOT
#include <base64.hpp>
const br_ec_private_key *AWS_IoT_Private_Key = nullptr;
const br_x509_certificate *AWS_IoT_Client_Certificate = nullptr;
class tls_entry_t {
public:
uint32_t name; // simple 4 letters name. Currently 'skey', 'crt ', 'crt1', 'crt2'
uint16_t start; // start offset
uint16_t len; // len of object
}; // 8 bytes
const static uint32_t TLS_NAME_SKEY = 0x2079656B; // 'key ' little endian
const static uint32_t TLS_NAME_CRT = 0x20747263; // 'crt ' little endian
class tls_dir_t {
public:
tls_entry_t entry[4]; // 4 entries max, only 4 used today, for future use
}; // 4*8 = 64 bytes
tls_dir_t tls_dir; // memory copy of tls_dir from flash
#endif // USE_MQTT_AWS_IOT
// check whether the fingerprint is filled with a single value
// Filled with 0x00 = accept any fingerprint and learn it for next time
// Filled with 0xFF = accept any fingerpring forever
bool is_fingerprint_mono_value(uint8_t finger[20], uint8_t value) {
for (uint32_t i = 0; i<20; i++) {
if (finger[i] != value) {
return false;
}
}
return true;
}
#endif // USE_MQTT_TLS
void MakeValidMqtt(uint32_t option, char* str) {
// option 0 = replace by underscore
// option 1 = delete character
uint32_t i = 0;
while (str[i] > 0) {
// if ((str[i] == '/') || (str[i] == '+') || (str[i] == '#') || (str[i] == ' ')) {
if ((str[i] == '+') || (str[i] == '#') || (str[i] == ' ')) {
if (option) {
uint32_t j = i;
while (str[j] > 0) {
str[j] = str[j +1];
j++;
}
i--;
} else {
str[i] = '_';
}
}
i++;
}
}
/*********************************************************************************************\
* MQTT driver specific code need to provide the following functions:
*
* bool MqttIsConnected()
* void MqttDisconnect()
* void MqttSubscribeLib(char *topic)
* bool MqttPublishLib(const char* topic, bool retained)
\*********************************************************************************************/
#include <PubSubClient.h>
// Max message size calculated by PubSubClient is (MQTT_MAX_PACKET_SIZE < 5 + 2 + strlen(topic) + plength)
#if (MQTT_MAX_PACKET_SIZE -TOPSZ -7) < MIN_MESSZ // If the max message size is too small, throw an error at compile time. See PubSubClient.cpp line 359
#error "MQTT_MAX_PACKET_SIZE is too small in libraries/PubSubClient/src/PubSubClient.h, increase it to at least 1200"
#endif
PubSubClient MqttClient;
void MqttInit(void) {
#ifdef USE_MQTT_AZURE_IOT
Settings.mqtt_port = 8883;
#endif //USE_MQTT_AZURE_IOT
#ifdef USE_MQTT_TLS
if ((8883 == Settings.mqtt_port) || (8884 == Settings.mqtt_port)) {
// Turn on TLS for port 8883 (TLS) and 8884 (TLS, client certificate)
Settings.flag4.mqtt_tls = true;
}
Mqtt.mqtt_tls = Settings.flag4.mqtt_tls; // this flag should not change even if we change the SetOption (until reboot)
// Detect AWS IoT and set default parameters
String host = String(SettingsText(SET_MQTT_HOST));
if (host.indexOf(F(".iot.")) && host.endsWith(F(".amazonaws.com"))) { // look for ".iot." and ".amazonaws.com" in the domain name
Settings.flag4.mqtt_no_retain = true;
}
if (Mqtt.mqtt_tls) {
#ifdef ESP32
tlsClient = new BearSSL::WiFiClientSecure_light(2048,2048);
#else // ESP32 - ESP8266
tlsClient = new BearSSL::WiFiClientSecure_light(1024,1024);
#endif
#ifdef USE_MQTT_AWS_IOT
loadTlsDir(); // load key and certificate data from Flash
if ((nullptr != AWS_IoT_Private_Key) && (nullptr != AWS_IoT_Client_Certificate)) {
tlsClient->setClientECCert(AWS_IoT_Client_Certificate,
AWS_IoT_Private_Key,
0xFFFF /* all usages, don't care */, 0);
}
#endif
#ifdef USE_MQTT_TLS_CA_CERT
tlsClient->setTrustAnchor(Tasmota_TA, nitems(Tasmota_TA));
#endif // USE_MQTT_TLS_CA_CERT
MqttClient.setClient(*tlsClient);
} else {
MqttClient.setClient(EspClient); // non-TLS
}
#else // USE_MQTT_TLS
MqttClient.setClient(EspClient);
#endif // USE_MQTT_TLS
MqttClient.setKeepAlive(Settings.mqtt_keepalive);
MqttClient.setSocketTimeout(Settings.mqtt_socket_timeout);
}
#ifdef USE_MQTT_AZURE_IOT
String Sha256Sign(String dataToSign, String preSharedKey){
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "sha256 dataToSign is '%s'"), String(dataToSign).c_str());
char dataToSignChar[dataToSign.length() + 1];
dataToSign.toCharArray(dataToSignChar, dataToSign.length() + 1);
unsigned char decodedPSK[32];
unsigned char encryptedSignature[100];
unsigned char encodedSignature[100];
br_sha256_context sha256_context;
br_hmac_key_context hmac_key_context;
br_hmac_context hmac_context;
// need to base64 decode the Preshared key and the length
int base64_decoded_device_length = decode_base64((unsigned char*)preSharedKey.c_str(), decodedPSK);
// create the sha256 hmac and hash the data
br_sha256_init(&sha256_context);
br_hmac_key_init(&hmac_key_context, sha256_context.vtable, decodedPSK, base64_decoded_device_length);
br_hmac_init(&hmac_context, &hmac_key_context, 32);
br_hmac_update(&hmac_context, dataToSignChar, sizeof(dataToSignChar)-1);
br_hmac_out(&hmac_context, encryptedSignature);
// base64 decode the HMAC to a char
encode_base64(encryptedSignature, br_hmac_size(&hmac_context), encodedSignature);
// creating the real SAS Token
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "sha256 signature is '%s'"), String((char*)encodedSignature).c_str());
return String((char*)encodedSignature);
}
String urlEncodeBase64(String stringToEncode){
// correctly URL encoding the 64 characters of Base64 and the '=' sign
stringToEncode.replace("+", "%2B");
stringToEncode.replace("=", "%3D");
stringToEncode.replace("/", "%2F");
return stringToEncode;
}
String AzurePSKtoToken(char *iotHubFQDN, const char *deviceId, const char *preSharedKey, int sasTTL = 86400){
int ttl = time(NULL) + sasTTL;
String dataToSignString = urlEncodeBase64(String(iotHubFQDN) + "/devices/" + String(deviceId)) + "\n" + String(ttl);
String signedData = Sha256Sign(dataToSignString, String(preSharedKey));
// creating the real SAS Token
String realSASToken = "SharedAccessSignature sr=" + urlEncodeBase64(String(iotHubFQDN) + "/devices/" + String(deviceId));
realSASToken += "&sig=" + urlEncodeBase64(signedData) + "&se=" + String(ttl);
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "Azure IoT Hub SAS Token is '%s'"), realSASToken.c_str());
return realSASToken;
}
#if defined(USE_MQTT_AZURE_DPS_SCOPEID) && defined(USE_MQTT_AZURE_DPS_PRESHAREDKEY)
String AzureDSPPSKtoToken(String scopeId, String deviceId, const char *preSharedKey, int sasTTL = 3600){
int ttl = time(NULL) + sasTTL;
String dataToSignString = urlEncodeBase64(scopeId + "/registrations/" + deviceId) + "\n" + String(ttl);
String signedData = Sha256Sign(dataToSignString, String(preSharedKey));
// creating the real SAS Token
String realSASToken = "SharedAccessSignature sr=" + urlEncodeBase64(scopeId + "/registrations/" + deviceId);
realSASToken += "&sig=" + urlEncodeBase64(signedData) + "&skn=registration" + "&se=" + String(ttl);
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "Azure DPS SAS Token is '%s'"), realSASToken.c_str());
return realSASToken;
}
void ProvisionAzureDPS(){
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT "Starting Azure DPS registration..."));
// Scope and Key are derived from user_config_override.h, USE_MQTT_AZURE_DPS_SCOPE_ENDPOINT is optional
String dPSScopeId = USE_MQTT_AZURE_DPS_SCOPEID;
String dPSPreSharedKey = USE_MQTT_AZURE_DPS_PRESHAREDKEY;
#if defined(USE_MQTT_AZURE_DPS_SCOPE_ENDPOINT)
String endpoint=USE_MQTT_AZURE_DPS_SCOPE_ENDPOINT;
#else
String endpoint="https://global.azure-devices-provisioning.net/";
#endif //USE_MQTT_AZURE_DPS_SCOPE_ENDPOINT
String MACAddress = WiFi.macAddress();
MACAddress.replace(":", "");
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "DPS register for %s, scope %s to %s."), MACAddress.c_str(), dPSScopeId.c_str(), endpoint.c_str());
// derive our PSK from the DPS and set the device ID
String devicePresharedKey = Sha256Sign(MACAddress, dPSPreSharedKey);
char devicePresharedKeyChar[devicePresharedKey.length() + 1];
devicePresharedKey.toCharArray(devicePresharedKeyChar, devicePresharedKey.length() + 1);
// generate a SAS Token with this new derived key
String dPSSASToken = AzureDSPPSKtoToken(dPSScopeId, MACAddress, devicePresharedKey.c_str());
// REST to DPS to start the assigning process
String dPSURL = endpoint + dPSScopeId + "/registrations/" + MACAddress + "/register?api-version=2019-03-31";
String dPSPutContent = "{\"registrationId\": \"" + MACAddress + "\"}";
httpsClient.setReuse(true);
httpsClient.begin(*tlsHttpsClient, dPSURL);
httpsClient.addHeader("User-Agent", "Tasmota");
httpsClient.addHeader("Content-Type", "application/json");
httpsClient.addHeader("Content-Encoding", "utf-8");
httpsClient.addHeader("Authorization", dPSSASToken);
httpsClientReturn = httpsClient.PUT(dPSPutContent);
String dPSAssigningResponseJSON;
if (httpsClientReturn == HTTP_CODE_ACCEPTED){
dPSAssigningResponseJSON = httpsClient.getString();
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "DPS Assigning response '%s'"), dPSAssigningResponseJSON.c_str());
} else {
dPSAssigningResponseJSON = httpsClient.getString();
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "DPS Assigning response '%s'"), dPSAssigningResponseJSON.c_str());
AddLog(LOG_LEVEL_ERROR, PSTR(D_LOG_MQTT "Azure DPS REST assignment connection failed with code '%d'. Restarting."), httpsClientReturn);
WebRestart(1);
}
if (dPSAssigningResponseJSON.indexOf("\"assigning\"") == -1){
AddLog(LOG_LEVEL_ERROR, PSTR(D_LOG_MQTT "Azure DPS assignment failed with response '%s'. Restarting."), dPSAssigningResponseJSON.c_str());
WebRestart(1);
} else {
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "Azure DPS assignment response '%s'."), dPSAssigningResponseJSON.c_str());
}
httpsClient.end();
JsonParser dPSAssigningResponseParser((char*) dPSAssigningResponseJSON.c_str());
JsonParserObject dPSAssigningResponseRoot = dPSAssigningResponseParser.getRootObject();
String dPSAssigningOperationId = dPSAssigningResponseRoot.getStr("operationId");
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "DPS operationId is '%s'."), dPSAssigningOperationId.c_str());
bool assigned = false;
int assignedCounter = 1;
String dPSAssignedResponseJSON;
dPSURL = endpoint + dPSScopeId + "/registrations/" + MACAddress + "/operations/" + dPSAssigningOperationId + "?api-version=2019-03-31";
while (!assigned && assignedCounter < 5){
httpsClient.begin(*tlsHttpsClient, dPSURL);
httpsClient.addHeader("User-Agent", "Tasmota");
httpsClient.addHeader("Content-Type", "application/json");
httpsClient.addHeader("Content-Encoding", "utf-8");
httpsClient.addHeader("Authorization", dPSSASToken);
httpsClientReturn = httpsClient.GET();
if (httpsClientReturn == HTTP_CODE_OK){
dPSAssignedResponseJSON = httpsClient.getString();
} else if (httpsClientReturn != HTTP_CODE_ACCEPTED){
AddLog(LOG_LEVEL_ERROR, PSTR(D_LOG_MQTT "Azure DPS REST check connection failed with code '%d'."), httpsClientReturn);
}
if (dPSAssignedResponseJSON.indexOf("\"status\":\"assigned\"") > 0){
assigned = true;
} else if (httpsClientReturn != HTTP_CODE_ACCEPTED) {
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "DPS try %d, response '%s'."), assignedCounter, dPSAssignedResponseJSON.c_str());
}
delay(1000 * assignedCounter);
assignedCounter+=1;
}
httpsClient.end();
if (assigned){
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "Azure DPS registration response '%s'."), dPSAssignedResponseJSON.c_str());
JsonParser parser((char*) dPSAssignedResponseJSON.c_str());
JsonParserObject stateObject = parser.getRootObject()[PSTR("registrationState")].getObject();
String deviceId = stateObject["deviceId"].getStr();
String iotHub = stateObject["assignedHub"].getStr();
bool newProvision = false;
if (String(SettingsText(SET_MQTT_PWD)) != devicePresharedKey ||
String(SettingsText(SET_MQTT_HOST)) != iotHub ||
String(SettingsText(SET_MQTT_CLIENT)) != deviceId ||
String(SettingsText(SET_MQTT_USER)) != deviceId) {
newProvision = true;
SettingsUpdateText(SET_MQTT_PWD, devicePresharedKey.c_str());
SettingsUpdateText(SET_MQTT_HOST, iotHub.c_str());
SettingsUpdateText(SET_MQTT_CLIENT, deviceId.c_str());
SettingsUpdateText(SET_MQTT_USER, deviceId.c_str());
}
if (newProvision){ // because this is the first time we have been provisioned must reboot
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT "Azure DPS registration success, changed in DPS registration, restarting."));
WebRestart(1);
} else {
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT "Azure DPS registration success, no changes."));
}
} else {
AddLog(LOG_LEVEL_ERROR, PSTR(D_LOG_MQTT "Azure DPS registration response failed with response '%s'."), dPSAssignedResponseJSON.c_str());
}
}
#endif // USE_MQTT_AZURE_DPS_SCOPEID
#endif // USE_MQTT_AZURE_IOT
bool MqttIsConnected(void) {
return MqttClient.connected();
}
void MqttDisconnect(void) {
MqttClient.disconnect();
}
void MqttSubscribeLib(const char *topic) {
#ifdef USE_MQTT_AZURE_IOT
// Azure IoT Hub currently does not support custom topics: https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-mqtt-support
String realTopicString = "devices/" + String(SettingsText(SET_MQTT_CLIENT));
realTopicString += "/messages/devicebound/#";
MqttClient.subscribe(realTopicString.c_str());
SettingsUpdateText(SET_MQTT_FULLTOPIC, SettingsText(SET_MQTT_CLIENT));
SettingsUpdateText(SET_MQTT_TOPIC, SettingsText(SET_MQTT_CLIENT));
#else
MqttClient.subscribe(topic);
#endif // USE_MQTT_AZURE_IOT
MqttClient.loop(); // Solve LmacRxBlk:1 messages
}
void MqttUnsubscribeLib(const char *topic) {
MqttClient.unsubscribe(topic);
MqttClient.loop(); // Solve LmacRxBlk:1 messages
}
bool MqttPublishLib(const char* topic, bool retained) {
// If Prefix1 equals Prefix2 disable next MQTT subscription to prevent loop
if (!strcmp(SettingsText(SET_MQTTPREFIX1), SettingsText(SET_MQTTPREFIX2))) {
char *str = strstr(topic, SettingsText(SET_MQTTPREFIX1));
if (str == topic) {
TasmotaGlobal.mqtt_cmnd_blocked_reset = 4; // Allow up to four seconds before resetting residual cmnd blocks
TasmotaGlobal.mqtt_cmnd_blocked++;
}
}
bool result;
#ifdef USE_MQTT_AZURE_IOT
String sourceTopicString = urlEncodeBase64(String(topic));
String topicString = "devices/" + String(SettingsText(SET_MQTT_CLIENT));
topicString+= "/messages/events/topic=" + sourceTopicString;
JsonParser mqtt_message((char*) String(TasmotaGlobal.mqtt_data).c_str());
JsonParserObject message_object = mqtt_message.getRootObject();
if (message_object.isValid()) { // only sending valid JSON, yet this is optional
result = MqttClient.publish(topicString.c_str(), TasmotaGlobal.mqtt_data, retained);
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "Sending '%s'"), TasmotaGlobal.mqtt_data);
} else {
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "Invalid JSON, '%s' for topic '%s', not sending to Azure IoT Hub"), TasmotaGlobal.mqtt_data, topic);
result = true;
}
#else
result = MqttClient.publish(topic, TasmotaGlobal.mqtt_data, retained);
#endif // USE_MQTT_AZURE_IOT
yield(); // #3313
return result;
}
#ifdef DEBUG_TASMOTA_CORE
void MqttDumpData(char* topic, char* data, uint32_t data_len) {
char dump_data[data_len +1];
memcpy(dump_data, data, sizeof(dump_data)); // Make another copy for removing optional control characters
DEBUG_CORE_LOG(PSTR(D_LOG_MQTT "Size %d, \"%s %s\""), data_len, topic, RemoveControlCharacter(dump_data));
}
#endif
void MqttDataHandler(char* mqtt_topic, uint8_t* mqtt_data, unsigned int data_len) {
#ifdef USE_DEBUG_DRIVER
ShowFreeMem(PSTR("MqttDataHandler"));
#endif
// Do not allow more data than would be feasable within stack space
if (data_len >= MQTT_MAX_PACKET_SIZE) { return; }
// Do not execute multiple times if Prefix1 equals Prefix2
if (!strcmp(SettingsText(SET_MQTTPREFIX1), SettingsText(SET_MQTTPREFIX2))) {
char *str = strstr(mqtt_topic, SettingsText(SET_MQTTPREFIX1));
if ((str == mqtt_topic) && TasmotaGlobal.mqtt_cmnd_blocked) {
TasmotaGlobal.mqtt_cmnd_blocked--;
return;
}
}
#ifdef USE_MQTT_FILE
FMqtt.topic_size = strlen(mqtt_topic);
#endif // USE_MQTT_FILE
// AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "BufferSize %d, Topic |%s|, Length %d, data_len %d"), MqttClient.getBufferSize(), mqtt_topic, strlen(mqtt_topic), data_len);
// Save MQTT data ASAP as it's data is discarded by PubSubClient with next publish as used in MQTTlog
char topic[TOPSZ];
#ifdef USE_MQTT_AZURE_IOT
// for Azure, we read the topic from the property of the message
String fullTopicString = String(mqtt_topic);
String toppicUpper = fullTopicString;
toppicUpper.toUpperCase();
int startOfTopic = toppicUpper.indexOf("TOPIC=");
if (startOfTopic == -1){
AddLog(LOG_LEVEL_ERROR, PSTR(D_LOG_MQTT "Azure IoT message without the property topic."));
return;
}
String newTopic = fullTopicString.substring(startOfTopic + 6);
newTopic.replace("%2F", "/");
if (newTopic.indexOf("/") == -1){
AddLog(LOG_LEVEL_ERROR, PSTR(D_LOG_MQTT "Invalid Topic %s"), newTopic.c_str());
return;
}
strlcpy(topic, newTopic.c_str(), sizeof(topic));
#else
strlcpy(topic, mqtt_topic, sizeof(topic));
#endif // USE_MQTT_AZURE_IOT
mqtt_data[data_len] = 0;
char data[data_len +1];
memcpy(data, mqtt_data, sizeof(data));
#ifdef DEBUG_TASMOTA_CORE
MqttDumpData(topic, data, data_len); // Use a function to save stack space used by dump_data
#endif
// MQTT pre-processing
XdrvMailbox.index = strlen(topic);
XdrvMailbox.data_len = data_len;
XdrvMailbox.topic = topic;
XdrvMailbox.data = (char*)data;
if (XdrvCall(FUNC_MQTT_DATA)) { return; }
ShowSource(SRC_MQTT);
CommandHandler(topic, data, data_len);
}
/*********************************************************************************************/
void MqttRetryCounter(uint8_t value) {
Mqtt.retry_counter = value;
}
void MqttSubscribe(const char *topic) {
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT D_SUBSCRIBE_TO " %s"), topic);
MqttSubscribeLib(topic);
}
void MqttUnsubscribe(const char *topic) {
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT D_UNSUBSCRIBE_FROM " %s"), topic);
MqttUnsubscribeLib(topic);
}
void MqttPublishLoggingAsync(bool refresh) {
static uint32_t index = 1;
if (!Settings.mqttlog_level || !Settings.flag.mqtt_enabled || !Mqtt.connected) { return; } // SetOption3 - Enable MQTT
if (refresh && !NeedLogRefresh(Settings.mqttlog_level, index)) { return; }
char* line;
size_t len;
while (GetLog(Settings.mqttlog_level, &index, &line, &len)) {
strlcpy(TasmotaGlobal.mqtt_data, line, len); // No JSON and ugly!!
char stopic[TOPSZ];
GetTopic_P(stopic, STAT, TasmotaGlobal.mqtt_topic, PSTR("LOGGING"));
MqttPublishLib(stopic, false);
}
}
void MqttPublish(const char* topic, bool retained) {
#ifdef USE_DEBUG_DRIVER
ShowFreeMem(PSTR("MqttPublish"));
#endif
if (Settings.flag4.mqtt_no_retain) { // SetOption104 - Disable all MQTT retained messages, some brokers don't support it: AWS IoT, Losant
retained = false; // Some brokers don't support retained, they will disconnect if received
}
String log_data; // 20210420 Moved to heap to solve tight stack resulting in exception 2
if (Settings.flag.mqtt_enabled && MqttPublishLib(topic, retained)) { // SetOption3 - Enable MQTT
log_data = F(D_LOG_MQTT); // MQT:
log_data += topic; // stat/tasmota/STATUS2
} else {
log_data = F(D_LOG_RESULT); // RSL:
log_data += strrchr(topic,'/')+1; // STATUS2
retained = false; // Without MQTT enabled there is no retained message
}
log_data += F(" = "); // =
log_data += TasmotaGlobal.mqtt_data; // {"StatusFWR":{"Version":...
if (retained) { log_data += F(" (" D_RETAINED ")"); } // (retained)
AddLogData(LOG_LEVEL_INFO, log_data.c_str()); // MQT: stat/tasmota/STATUS2 = {"StatusFWR":{"Version":...
if (Settings.ledstate &0x04) {
TasmotaGlobal.blinks++;
}
}
void MqttPublish(const char* topic) {
MqttPublish(topic, false);
}
void MqttPublishPrefixTopic_P(uint32_t prefix, const char* subtopic, bool retained) {
/* prefix 0 = cmnd using subtopic
* prefix 1 = stat using subtopic
* prefix 2 = tele using subtopic
* prefix 4 = cmnd using subtopic or RESULT
* prefix 5 = stat using subtopic or RESULT
* prefix 6 = tele using subtopic or RESULT
*/
char romram[64];
snprintf_P(romram, sizeof(romram), ((prefix > 3) && !Settings.flag.mqtt_response) ? S_RSLT_RESULT : subtopic); // SetOption4 - Switch between MQTT RESULT or COMMAND
UpperCase(romram, romram);
prefix &= 3;
char stopic[TOPSZ];
GetTopic_P(stopic, prefix, TasmotaGlobal.mqtt_topic, romram);
MqttPublish(stopic, retained);
#if defined(USE_MQTT_AWS_IOT) || defined(USE_MQTT_AWS_IOT_LIGHT)
if ((prefix > 0) && (Settings.flag4.awsiot_shadow) && (Mqtt.connected)) { // placeholder for SetOptionXX
// compute the target topic
char *topic = SettingsText(SET_MQTT_TOPIC);
char topic2[strlen(topic)+1]; // save buffer onto stack
strcpy(topic2, topic);
// replace any '/' with '_'
char *s = topic2;
while (*s) {
if ('/' == *s) {
*s = '_';
}
s++;
}
// update topic is "$aws/things/<topic>/shadow/update"
snprintf_P(romram, sizeof(romram), PSTR("$aws/things/%s/shadow/update"), topic2);
// copy buffer
char *mqtt_save = (char*) malloc(strlen(TasmotaGlobal.mqtt_data)+1);
if (!mqtt_save) { return; } // abort
strcpy(mqtt_save, TasmotaGlobal.mqtt_data);
snprintf_P(TasmotaGlobal.mqtt_data, sizeof(TasmotaGlobal.mqtt_data), PSTR("{\"state\":{\"reported\":%s}}"), mqtt_save);
free(mqtt_save);
bool result = MqttClient.publish(romram, TasmotaGlobal.mqtt_data, false);
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "Updated shadow: %s"), romram);
yield(); // #3313
}
#endif // USE_MQTT_AWS_IOT
}
void MqttPublishPrefixTopic_P(uint32_t prefix, const char* subtopic) {
MqttPublishPrefixTopic_P(prefix, subtopic, false);
}
void MqttPublishPrefixTopicRulesProcess_P(uint32_t prefix, const char* subtopic, bool retained) {
MqttPublishPrefixTopic_P(prefix, subtopic, retained);
XdrvRulesProcess(0);
}
void MqttPublishPrefixTopicRulesProcess_P(uint32_t prefix, const char* subtopic) {
MqttPublishPrefixTopicRulesProcess_P(prefix, subtopic, false);
}
void MqttPublishTeleSensor(void) {
MqttPublishPrefixTopicRulesProcess_P(TELE, PSTR(D_RSLT_SENSOR), Settings.flag.mqtt_sensor_retain); // CMND_SENSORRETAIN
}
void MqttPublishPowerState(uint32_t device) {
char stopic[TOPSZ];
char scommand[33];
if ((device < 1) || (device > TasmotaGlobal.devices_present)) { device = 1; }
#ifdef USE_SONOFF_IFAN
if (IsModuleIfan() && (device > 1)) {
if (GetFanspeed() < MaxFanspeed()) { // 4 occurs when fanspeed is 3 and RC button 2 is pressed
#ifdef USE_DOMOTICZ
DomoticzUpdateFanState(); // RC Button feedback
#endif // USE_DOMOTICZ
snprintf_P(scommand, sizeof(scommand), PSTR(D_CMND_FANSPEED));
GetTopic_P(stopic, STAT, TasmotaGlobal.mqtt_topic, (Settings.flag.mqtt_response) ? scommand : S_RSLT_RESULT); // SetOption4 - Switch between MQTT RESULT or COMMAND
Response_P(S_JSON_COMMAND_NVALUE, scommand, GetFanspeed());
MqttPublish(stopic);
}
} else {
#endif // USE_SONOFF_IFAN
GetPowerDevice(scommand, device, sizeof(scommand), Settings.flag.device_index_enable); // SetOption26 - Switch between POWER or POWER1
GetTopic_P(stopic, STAT, TasmotaGlobal.mqtt_topic, (Settings.flag.mqtt_response) ? scommand : S_RSLT_RESULT); // SetOption4 - Switch between MQTT RESULT or COMMAND
Response_P(S_JSON_COMMAND_SVALUE, scommand, GetStateText(bitRead(TasmotaGlobal.power, device -1)));
MqttPublish(stopic);
if (!Settings.flag4.only_json_message) { // SetOption90 - Disable non-json MQTT response
GetTopic_P(stopic, STAT, TasmotaGlobal.mqtt_topic, scommand);
Response_P(GetStateText(bitRead(TasmotaGlobal.power, device -1)));
MqttPublish(stopic, Settings.flag.mqtt_power_retain); // CMND_POWERRETAIN
}
#ifdef USE_SONOFF_IFAN
}
#endif // USE_SONOFF_IFAN
}
void MqttPublishAllPowerState(void) {
for (uint32_t i = 1; i <= TasmotaGlobal.devices_present; i++) {
MqttPublishPowerState(i);
#ifdef USE_SONOFF_IFAN
if (IsModuleIfan()) { break; } // Report status of light relay only
#endif // USE_SONOFF_IFAN
}
}
void MqttPublishPowerBlinkState(uint32_t device) {
char scommand[33];
if ((device < 1) || (device > TasmotaGlobal.devices_present)) {
device = 1;
}
Response_P(PSTR("{\"%s\":\"" D_JSON_BLINK " %s\"}"),
GetPowerDevice(scommand, device, sizeof(scommand), Settings.flag.device_index_enable), GetStateText(bitRead(TasmotaGlobal.blink_mask, device -1))); // SetOption26 - Switch between POWER or POWER1
MqttPublishPrefixTopicRulesProcess_P(RESULT_OR_STAT, S_RSLT_POWER);
}
/*********************************************************************************************/
uint16_t MqttConnectCount(void) {
return Mqtt.connect_count;
}
void MqttDisconnected(int state) {
Mqtt.connected = false;
Mqtt.retry_counter = Settings.mqtt_retry * Mqtt.retry_counter_delay;
if ((Settings.mqtt_retry * Mqtt.retry_counter_delay) < 120) {
Mqtt.retry_counter_delay++;
}
MqttClient.disconnect();
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT D_CONNECT_FAILED_TO " %s:%d, rc %d. " D_RETRY_IN " %d " D_UNIT_SECOND), SettingsText(SET_MQTT_HOST), Settings.mqtt_port, state, Mqtt.retry_counter);
TasmotaGlobal.rules_flag.mqtt_disconnected = 1;
}
void MqttConnected(void) {
char stopic[TOPSZ];
if (Mqtt.allowed) {
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT D_CONNECTED));
Mqtt.connected = true;
Mqtt.retry_counter = 0;
Mqtt.retry_counter_delay = 1;
Mqtt.connect_count++;
GetTopic_P(stopic, TELE, TasmotaGlobal.mqtt_topic, S_LWT);
Response_P(PSTR(MQTT_LWT_ONLINE));
MqttPublish(stopic, true);
if (!Settings.flag4.only_json_message) { // SetOption90 - Disable non-json MQTT response
// Satisfy iobroker (#299)
ResponseClear();
MqttPublishPrefixTopic_P(CMND, S_RSLT_POWER);
}
GetTopic_P(stopic, CMND, TasmotaGlobal.mqtt_topic, PSTR("#"));
MqttSubscribe(stopic);
if (strstr_P(SettingsText(SET_MQTT_FULLTOPIC), MQTT_TOKEN_TOPIC) != nullptr) {
uint32_t real_index = SET_MQTT_GRP_TOPIC;
for (uint32_t i = 0; i < MAX_GROUP_TOPICS; i++) {
if (1 == i) { real_index = SET_MQTT_GRP_TOPIC2 -1; }
if (strlen(SettingsText(real_index +i))) {
GetGroupTopic_P(stopic, PSTR("#"), real_index +i); // SetOption75 0: %prefix%/nothing/%topic% = cmnd/nothing/<grouptopic>/# or SetOption75 1: cmnd/<grouptopic>
MqttSubscribe(stopic);
}
}
GetFallbackTopic_P(stopic, PSTR("#"));
MqttSubscribe(stopic);
}
XdrvCall(FUNC_MQTT_SUBSCRIBE);
}
if (Mqtt.initial_connection_state) {
if (ResetReason() != REASON_DEEP_SLEEP_AWAKE) {
char stopic2[TOPSZ];
Response_P(PSTR("{\"Info1\":{\"" D_CMND_MODULE "\":\"%s\",\"" D_JSON_VERSION "\":\"%s%s\",\"" D_JSON_FALLBACKTOPIC "\":\"%s\",\"" D_CMND_GROUPTOPIC "\":\"%s\"}}"),
ModuleName().c_str(), TasmotaGlobal.version, TasmotaGlobal.image_name, GetFallbackTopic_P(stopic, ""), GetGroupTopic_P(stopic2, "", SET_MQTT_GRP_TOPIC));
MqttPublishPrefixTopicRulesProcess_P(TELE, PSTR(D_RSLT_INFO "1"), Settings.flag5.mqtt_info_retain);
#ifdef USE_WEBSERVER
if (Settings.webserver) {
#if LWIP_IPV6
Response_P(PSTR("{\"Info2\":{\"" D_JSON_WEBSERVER_MODE "\":\"%s\",\"" D_CMND_HOSTNAME "\":\"%s\",\"" D_CMND_IPADDRESS "\":\"%s\",\"IPv6Address\":\"%s\"}}"),
(2 == Settings.webserver) ? PSTR(D_ADMIN) : PSTR(D_USER), NetworkHostname(), NetworkAddress().toString().c_str(), WifiGetIPv6().c_str(), Settings.flag5.mqtt_info_retain);
#else
Response_P(PSTR("{\"Info2\":{\"" D_JSON_WEBSERVER_MODE "\":\"%s\",\"" D_CMND_HOSTNAME "\":\"%s\",\"" D_CMND_IPADDRESS "\":\"%s\"}}"),
(2 == Settings.webserver) ? PSTR(D_ADMIN) : PSTR(D_USER), NetworkHostname(), NetworkAddress().toString().c_str(), Settings.flag5.mqtt_info_retain);
#endif // LWIP_IPV6 = 1
MqttPublishPrefixTopicRulesProcess_P(TELE, PSTR(D_RSLT_INFO "2"), Settings.flag5.mqtt_info_retain);
}
#endif // USE_WEBSERVER
Response_P(PSTR("{\"Info3\":{\"" D_JSON_RESTARTREASON "\":"));
if (CrashFlag()) {
CrashDump();
} else {
ResponseAppend_P(PSTR("\"%s\""), GetResetReason().c_str());
}
ResponseJsonEndEnd();
MqttPublishPrefixTopicRulesProcess_P(TELE, PSTR(D_RSLT_INFO "3"), Settings.flag5.mqtt_info_retain);
}
MqttPublishAllPowerState();
if (Settings.tele_period) {
TasmotaGlobal.tele_period = Settings.tele_period -5; // Enable TelePeriod in 5 seconds
}
TasmotaGlobal.rules_flag.system_boot = 1;
XdrvCall(FUNC_MQTT_INIT);
}
Mqtt.initial_connection_state = 0;
TasmotaGlobal.global_state.mqtt_down = 0;
if (Settings.flag.mqtt_enabled) { // SetOption3 - Enable MQTT
TasmotaGlobal.rules_flag.mqtt_connected = 1;
}
}
void MqttReconnect(void) {
char stopic[TOPSZ];
Mqtt.allowed = Settings.flag.mqtt_enabled; // SetOption3 - Enable MQTT
if (Mqtt.allowed) {
#if defined(USE_MQTT_AZURE_DPS_SCOPEID) && defined(USE_MQTT_AZURE_DPS_PRESHAREDKEY)
ProvisionAzureDPS();
#endif
#ifdef USE_DISCOVERY
#ifdef MQTT_HOST_DISCOVERY
MqttDiscoverServer();
#endif // MQTT_HOST_DISCOVERY
#endif // USE_DISCOVERY
if (!strlen(SettingsText(SET_MQTT_HOST)) || !Settings.mqtt_port) {
Mqtt.allowed = false;
}
#if defined(USE_MQTT_TLS) && defined(USE_MQTT_AWS_IOT)
// don't enable MQTT for AWS IoT if Private Key or Certificate are not set
if (Mqtt.mqtt_tls) {
if (0 == strlen(SettingsText(SET_MQTT_PWD))) { // we anticipate that an empty password does not make sense with TLS. This avoids failed connections
Mqtt.allowed = false;
}
}
#endif
}
if (!Mqtt.allowed) {
MqttConnected();
return;
}
#ifdef USE_EMULATION
UdpDisconnect();
#endif // USE_EMULATION
Mqtt.connected = false;
Mqtt.retry_counter = Settings.mqtt_retry * Mqtt.retry_counter_delay;
TasmotaGlobal.global_state.mqtt_down = 1;
#ifdef FIRMWARE_MINIMAL
#ifndef USE_MQTT_TLS
// Don't try to connect if MQTT requires TLS but TLS is not supported
if (Settings.flag4.mqtt_tls) {
return;
}
#endif
#endif
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT D_ATTEMPTING_CONNECTION));
char *mqtt_user = nullptr;
char *mqtt_pwd = nullptr;
if (strlen(SettingsText(SET_MQTT_USER))) {
mqtt_user = SettingsText(SET_MQTT_USER);
}
if (strlen(SettingsText(SET_MQTT_PWD))) {
mqtt_pwd = SettingsText(SET_MQTT_PWD);
}
GetTopic_P(stopic, TELE, TasmotaGlobal.mqtt_topic, S_LWT);
Response_P(S_LWT_OFFLINE);
if (MqttClient.connected()) { MqttClient.disconnect(); }
EspClient.setTimeout(MQTT_WIFI_CLIENT_TIMEOUT);
#ifdef USE_MQTT_TLS
if (Mqtt.mqtt_tls) {
tlsClient->stop();
} else {
// EspClient = WiFiClient(); // Wifi Client reconnect issue 4497 (https://github.com/esp8266/Arduino/issues/4497)
MqttClient.setClient(EspClient);
}
#else
// EspClient = WiFiClient(); // Wifi Client reconnect issue 4497 (https://github.com/esp8266/Arduino/issues/4497)
MqttClient.setClient(EspClient);
#endif
if (2 == Mqtt.initial_connection_state) { // Executed once just after power on and wifi is connected
Mqtt.initial_connection_state = 1;
}
MqttClient.setCallback(MqttDataHandler);
#if defined(USE_MQTT_TLS) && defined(USE_MQTT_AWS_IOT)
// re-assign private keys in case it was updated in between
if (Mqtt.mqtt_tls) {
if ((nullptr != AWS_IoT_Private_Key) && (nullptr != AWS_IoT_Client_Certificate)) {
tlsClient->setClientECCert(AWS_IoT_Client_Certificate,
AWS_IoT_Private_Key,
0xFFFF /* all usages, don't care */, 0);
}
}
#endif
MqttClient.setServer(SettingsText(SET_MQTT_HOST), Settings.mqtt_port);
uint32_t mqtt_connect_time = millis();
#if defined(USE_MQTT_TLS) && !defined(USE_MQTT_TLS_CA_CERT)
bool allow_all_fingerprints;
bool learn_fingerprint1;
bool learn_fingerprint2;
if (Mqtt.mqtt_tls) {
allow_all_fingerprints = false;
learn_fingerprint1 = is_fingerprint_mono_value(Settings.mqtt_fingerprint[0], 0x00);
learn_fingerprint2 = is_fingerprint_mono_value(Settings.mqtt_fingerprint[1], 0x00);
allow_all_fingerprints |= is_fingerprint_mono_value(Settings.mqtt_fingerprint[0], 0xff);
allow_all_fingerprints |= is_fingerprint_mono_value(Settings.mqtt_fingerprint[1], 0xff);
allow_all_fingerprints |= learn_fingerprint1;
allow_all_fingerprints |= learn_fingerprint2;
tlsClient->setPubKeyFingerprint(Settings.mqtt_fingerprint[0], Settings.mqtt_fingerprint[1], allow_all_fingerprints);
}
#endif
bool lwt_retain = Settings.flag4.mqtt_no_retain ? false : true; // no retained last will if "no_retain"
#if defined(USE_MQTT_TLS) && defined(USE_MQTT_AWS_IOT)
if (Mqtt.mqtt_tls) {
if ((nullptr != AWS_IoT_Private_Key) && (nullptr != AWS_IoT_Client_Certificate)) {
// if private key is there, we remove user/pwd
mqtt_user = nullptr;
mqtt_pwd = nullptr;
}
}
#endif
#ifdef USE_MQTT_AZURE_IOT
String azureMqtt_password = SettingsText(SET_MQTT_PWD);
if (azureMqtt_password.indexOf("SharedAccessSignature") == -1) {
// assuming a PreSharedKey was provided, calculating a SAS Token into azureMqtt_password
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT "Authenticating with an Azure IoT Hub Token"));
azureMqtt_password = AzurePSKtoToken(SettingsText(SET_MQTT_HOST), SettingsText(SET_MQTT_CLIENT), SettingsText(SET_MQTT_PWD));
}
String azureMqtt_userString = String(SettingsText(SET_MQTT_HOST)) + "/" + String(SettingsText(SET_MQTT_CLIENT)); + "/?api-version=2018-06-30";
if (MqttClient.connect(TasmotaGlobal.mqtt_client, azureMqtt_userString.c_str(), azureMqtt_password.c_str(), stopic, 1, lwt_retain, TasmotaGlobal.mqtt_data, MQTT_CLEAN_SESSION)) {
#else
if (MqttClient.connect(TasmotaGlobal.mqtt_client, mqtt_user, mqtt_pwd, stopic, 1, lwt_retain, TasmotaGlobal.mqtt_data, MQTT_CLEAN_SESSION)) {
#endif // USE_MQTT_AZURE_IOT
#ifdef USE_MQTT_TLS
if (Mqtt.mqtt_tls) {
#ifdef ESP8266
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT "TLS connected in %d ms, max ThunkStack used %d"),
millis() - mqtt_connect_time, tlsClient->getMaxThunkStackUse());
#elif defined(ESP32)
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT "TLS connected in %d ms, stack low mark %d"),
millis() - mqtt_connect_time, uxTaskGetStackHighWaterMark(nullptr));
#endif
if (!tlsClient->getMFLNStatus()) {
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT "MFLN not supported by TLS server"));
}
#ifndef USE_MQTT_TLS_CA_CERT // don't bother with fingerprints if using CA validation
const uint8_t *recv_fingerprint = tlsClient->getRecvPubKeyFingerprint();
// create a printable version of the fingerprint received
char buf_fingerprint[64];
ToHex_P(recv_fingerprint, 20, buf_fingerprint, sizeof(buf_fingerprint), ' ');
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_MQTT "Server fingerprint: %s"), buf_fingerprint);
bool learned = false;
// If the fingerprint slot is marked for update, we'll do so.
// Otherwise, if the fingerprint slot had the magic trust-on-first-use
// value, we will save the current fingerprint there, but only if the other fingerprint slot
// *didn't* match it.
if (recv_fingerprint[20] & 0x1 || (learn_fingerprint1 && 0 != memcmp(recv_fingerprint, Settings.mqtt_fingerprint[1], 20))) {
memcpy(Settings.mqtt_fingerprint[0], recv_fingerprint, 20);
learned = true;
}
// As above, but for the other slot.
if (recv_fingerprint[20] & 0x2 || (learn_fingerprint2 && 0 != memcmp(recv_fingerprint, Settings.mqtt_fingerprint[0], 20))) {
memcpy(Settings.mqtt_fingerprint[1], recv_fingerprint, 20);
learned = true;
}
if (learned) {
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT "Fingerprint learned: %s"), buf_fingerprint);
SettingsSaveAll(); // save settings
}
#endif // !USE_MQTT_TLS_CA_CERT
}
#endif // USE_MQTT_TLS
MqttConnected();
} else {
#ifdef USE_MQTT_TLS
if (Mqtt.mqtt_tls) {
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_MQTT "TLS connection error: %d"), tlsClient->getLastError());
}
#endif
MqttDisconnected(MqttClient.state()); // status codes are documented here http://pubsubclient.knolleary.net/api.html#state
}
}
void MqttCheck(void) {
if (Settings.flag.mqtt_enabled) { // SetOption3 - Enable MQTT
if (!MqttIsConnected()) {
TasmotaGlobal.global_state.mqtt_down = 1;
if (!Mqtt.retry_counter) {
MqttReconnect();
} else {
Mqtt.retry_counter--;
}
} else {
TasmotaGlobal.global_state.mqtt_down = 0;
}
} else {
TasmotaGlobal.global_state.mqtt_down = 0;
if (Mqtt.initial_connection_state) {
MqttReconnect();
}
}
}
bool KeyTopicActive(uint32_t key) {
// key = 0 - Button topic
// key = 1 - Switch topic
key &= 1;
char key_topic[TOPSZ];
Format(key_topic, SettingsText(SET_MQTT_BUTTON_TOPIC + key), sizeof(key_topic));
return ((strlen(key_topic) != 0) && strcmp(key_topic, "0"));
}
/*********************************************************************************************\
* Commands
\*********************************************************************************************/
#if defined(USE_MQTT_TLS) && !defined(USE_MQTT_TLS_CA_CERT)
void CmndMqttFingerprint(void) {
if ((XdrvMailbox.index > 0) && (XdrvMailbox.index <= 2)) {
char fingerprint[60];
if ((XdrvMailbox.data_len > 0) && (XdrvMailbox.data_len < sizeof(fingerprint))) {
if (SC_DEFAULT == Shortcut()) {
memcpy_P(Settings.mqtt_fingerprint[XdrvMailbox.index -1], (1 == XdrvMailbox.index) ? default_fingerprint1 : default_fingerprint2, sizeof(default_fingerprint1));
} else {
strlcpy(fingerprint, (SC_CLEAR == Shortcut()) ? "" : XdrvMailbox.data, sizeof(fingerprint));
char *p = fingerprint;
for (uint32_t i = 0; i < 20; i++) {
Settings.mqtt_fingerprint[XdrvMailbox.index -1][i] = strtol(p, &p, 16);
}
}
TasmotaGlobal.restart_flag = 2;
}
ResponseCmndIdxChar(ToHex_P((unsigned char *)Settings.mqtt_fingerprint[XdrvMailbox.index -1], 20, fingerprint, sizeof(fingerprint), ' '));
}
}
#endif
void CmndMqttUser(void) {
if (XdrvMailbox.data_len > 0) {
SettingsUpdateText(SET_MQTT_USER, (SC_CLEAR == Shortcut()) ? "" : (SC_DEFAULT == Shortcut()) ? PSTR(MQTT_USER) : XdrvMailbox.data);
TasmotaGlobal.restart_flag = 2;
}
ResponseCmndChar(SettingsText(SET_MQTT_USER));
}
void CmndMqttPassword(void) {
bool show_asterisk = (2 == XdrvMailbox.index);
if (XdrvMailbox.data_len > 0) {
SettingsUpdateText(SET_MQTT_PWD, (SC_CLEAR == Shortcut()) ? "" : (SC_DEFAULT == Shortcut()) ? PSTR(MQTT_PASS) : XdrvMailbox.data);
if (!show_asterisk) {
ResponseCmndChar(SettingsText(SET_MQTT_PWD));
}
TasmotaGlobal.restart_flag = 2;
} else {
show_asterisk = true;
}
if (show_asterisk) {
Response_P(S_JSON_COMMAND_ASTERISK, XdrvMailbox.command);
}
}
void CmndMqttKeepAlive(void) {
if ((XdrvMailbox.payload >= 1) && (XdrvMailbox.payload <= 100)) {
Settings.mqtt_keepalive = XdrvMailbox.payload;
#ifdef USE_MQTT_NEW_PUBSUBCLIENT
MqttClient.setKeepAlive(Settings.mqtt_keepalive);
#endif
}
ResponseCmndNumber(Settings.mqtt_keepalive);
}
void CmndMqttTimeout(void) {
if ((XdrvMailbox.payload >= 1) && (XdrvMailbox.payload <= 100)) {
Settings.mqtt_socket_timeout = XdrvMailbox.payload;
#ifdef USE_MQTT_NEW_PUBSUBCLIENT
MqttClient.setSocketTimeout(Settings.mqtt_socket_timeout);
#endif
}
ResponseCmndNumber(Settings.mqtt_socket_timeout);
}
void CmndMqttlog(void) {
if ((XdrvMailbox.payload >= LOG_LEVEL_NONE) && (XdrvMailbox.payload <= LOG_LEVEL_DEBUG_MORE)) {
Settings.mqttlog_level = XdrvMailbox.payload;
}
ResponseCmndNumber(Settings.mqttlog_level);
}
void CmndMqttHost(void) {
if (XdrvMailbox.data_len > 0) {
SettingsUpdateText(SET_MQTT_HOST, (SC_CLEAR == Shortcut()) ? "" : (SC_DEFAULT == Shortcut()) ? MQTT_HOST : XdrvMailbox.data);
TasmotaGlobal.restart_flag = 2;
}
ResponseCmndChar(SettingsText(SET_MQTT_HOST));
}
void CmndMqttPort(void) {
if ((XdrvMailbox.payload > 0) && (XdrvMailbox.payload < 65536)) {
Settings.mqtt_port = (1 == XdrvMailbox.payload) ? MQTT_PORT : XdrvMailbox.payload;
TasmotaGlobal.restart_flag = 2;
}
ResponseCmndNumber(Settings.mqtt_port);
}
void CmndMqttRetry(void) {
if ((XdrvMailbox.payload >= MQTT_RETRY_SECS) && (XdrvMailbox.payload < 32001)) {
Settings.mqtt_retry = XdrvMailbox.payload;
Mqtt.retry_counter = Settings.mqtt_retry;
}
ResponseCmndNumber(Settings.mqtt_retry);
}
void CmndStateText(void) {
if ((XdrvMailbox.index > 0) && (XdrvMailbox.index <= MAX_STATE_TEXT)) {
if (!XdrvMailbox.usridx) {
ResponseCmndAll(SET_STATE_TXT1, MAX_STATE_TEXT);
} else {
if (XdrvMailbox.data_len > 0) {
for (uint32_t i = 0; i <= XdrvMailbox.data_len; i++) {
if (XdrvMailbox.data[i] == ' ') XdrvMailbox.data[i] = '_';
}
SettingsUpdateText(SET_STATE_TXT1 + XdrvMailbox.index -1, XdrvMailbox.data);
}
ResponseCmndIdxChar(GetStateText(XdrvMailbox.index -1));
}
}
}
void CmndMqttClient(void) {
if (!XdrvMailbox.grpflg && (XdrvMailbox.data_len > 0)) {
SettingsUpdateText(SET_MQTT_CLIENT, (SC_DEFAULT == Shortcut()) ? PSTR(MQTT_CLIENT_ID) : XdrvMailbox.data);
TasmotaGlobal.restart_flag = 2;
}
ResponseCmndChar(SettingsText(SET_MQTT_CLIENT));
}
void CmndFullTopic(void) {
if (XdrvMailbox.data_len > 0) {
MakeValidMqtt(1, XdrvMailbox.data);
if (!strcmp(XdrvMailbox.data, TasmotaGlobal.mqtt_client)) { SetShortcutDefault(); }
char stemp1[TOPSZ];
strlcpy(stemp1, (SC_DEFAULT == Shortcut()) ? MQTT_FULLTOPIC : XdrvMailbox.data, sizeof(stemp1));
if (strcmp(stemp1, SettingsText(SET_MQTT_FULLTOPIC))) {
Response_P((Settings.flag.mqtt_offline) ? S_LWT_OFFLINE : ""); // SetOption10 - Control MQTT LWT message format
MqttPublishPrefixTopic_P(TELE, S_LWT, true); // Offline or remove previous retained topic
SettingsUpdateText(SET_MQTT_FULLTOPIC, stemp1);
TasmotaGlobal.restart_flag = 2;
}
}
ResponseCmndChar(SettingsText(SET_MQTT_FULLTOPIC));
}
void CmndPrefix(void) {
if ((XdrvMailbox.index > 0) && (XdrvMailbox.index <= MAX_MQTT_PREFIXES)) {
if (!XdrvMailbox.usridx) {
ResponseCmndAll(SET_MQTTPREFIX1, MAX_MQTT_PREFIXES);
} else {
if (XdrvMailbox.data_len > 0) {
MakeValidMqtt(0, XdrvMailbox.data);
SettingsUpdateText(SET_MQTTPREFIX1 + XdrvMailbox.index -1,
(SC_DEFAULT == Shortcut()) ? (1==XdrvMailbox.index) ? PSTR(SUB_PREFIX) : (2==XdrvMailbox.index) ? PSTR(PUB_PREFIX) : PSTR(PUB_PREFIX2) : XdrvMailbox.data);
TasmotaGlobal.restart_flag = 2;
}
ResponseCmndIdxChar(SettingsText(SET_MQTTPREFIX1 + XdrvMailbox.index -1));
}
}
}
void CmndPublish(void) {
// Allow wildcard character "#" as space replacement in topic (#10258)
// publish cmnd/theo#arends/power 2 ==> publish cmnd/theo arends/power 2
if (XdrvMailbox.data_len > 0) {
char *payload_part;
char *mqtt_part = strtok_r(XdrvMailbox.data, " ", &payload_part);
if (mqtt_part) {
char stemp1[TOPSZ];
strlcpy(stemp1, mqtt_part, sizeof(stemp1));
ReplaceChar(stemp1, '#', ' ');
if ((payload_part != nullptr) && strlen(payload_part)) {
strlcpy(TasmotaGlobal.mqtt_data, payload_part, sizeof(TasmotaGlobal.mqtt_data));
} else {
ResponseClear();
}
MqttPublish(stemp1, (XdrvMailbox.index == 2));
// ResponseCmndDone();
ResponseClear();
}
}
}
void CmndGroupTopic(void) {
if ((XdrvMailbox.index > 0) && (XdrvMailbox.index <= MAX_GROUP_TOPICS)) {
if (XdrvMailbox.data_len > 0) {
uint32_t settings_text_index = (1 == XdrvMailbox.index) ? SET_MQTT_GRP_TOPIC : SET_MQTT_GRP_TOPIC2 + XdrvMailbox.index - 2;
MakeValidMqtt(0, XdrvMailbox.data);
if (!strcmp(XdrvMailbox.data, TasmotaGlobal.mqtt_client)) { SetShortcutDefault(); }
SettingsUpdateText(settings_text_index, (SC_CLEAR == Shortcut()) ? "" : (SC_DEFAULT == Shortcut()) ? PSTR(MQTT_GRPTOPIC) : XdrvMailbox.data);
// Eliminate duplicates, have at least one and fill from index 1
char stemp[MAX_GROUP_TOPICS][TOPSZ];
uint32_t read_index = 0;
uint32_t real_index = SET_MQTT_GRP_TOPIC;
for (uint32_t i = 0; i < MAX_GROUP_TOPICS; i++) {
if (1 == i) { real_index = SET_MQTT_GRP_TOPIC2 -1; }
if (strlen(SettingsText(real_index +i))) {
bool not_equal = true;
for (uint32_t j = 0; j < read_index; j++) {
if (!strcmp(SettingsText(real_index +i), stemp[j])) { // Topics are case-sensitive
not_equal = false;
}
}
if (not_equal) {
strncpy(stemp[read_index], SettingsText(real_index +i), sizeof(stemp[read_index]));
read_index++;
}
}
}
if (0 == read_index) {
SettingsUpdateText(SET_MQTT_GRP_TOPIC, PSTR(MQTT_GRPTOPIC));
} else {
uint32_t write_index = 0;
uint32_t real_index = SET_MQTT_GRP_TOPIC;
for (uint32_t i = 0; i < MAX_GROUP_TOPICS; i++) {
if (1 == i) { real_index = SET_MQTT_GRP_TOPIC2 -1; }
if (write_index < read_index) {
SettingsUpdateText(real_index +i, stemp[write_index]);
write_index++;
} else {
SettingsUpdateText(real_index +i, "");
}
}
}
TasmotaGlobal.restart_flag = 2;
}
ResponseCmndAll(SET_MQTT_GRP_TOPIC, MAX_GROUP_TOPICS);
}
}
void CmndTopic(void) {
if (!XdrvMailbox.grpflg && (XdrvMailbox.data_len > 0)) {
MakeValidMqtt(0, XdrvMailbox.data);
if (!strcmp(XdrvMailbox.data, TasmotaGlobal.mqtt_client)) { SetShortcutDefault(); }
char stemp1[TOPSZ];
strlcpy(stemp1, (SC_DEFAULT == Shortcut()) ? MQTT_TOPIC : XdrvMailbox.data, sizeof(stemp1));
if (strcmp(stemp1, SettingsText(SET_MQTT_TOPIC))) {
Response_P((Settings.flag.mqtt_offline) ? S_LWT_OFFLINE : ""); // SetOption10 - Control MQTT LWT message format
MqttPublishPrefixTopic_P(TELE, S_LWT, true); // Offline or remove previous retained topic
SettingsUpdateText(SET_MQTT_TOPIC, stemp1);
TasmotaGlobal.restart_flag = 2;
}
}
ResponseCmndChar(SettingsText(SET_MQTT_TOPIC));
}
void CmndButtonTopic(void) {
if (!XdrvMailbox.grpflg && (XdrvMailbox.data_len > 0)) {
MakeValidMqtt(0, XdrvMailbox.data);
if (!strcmp(XdrvMailbox.data, TasmotaGlobal.mqtt_client)) { SetShortcutDefault(); }
switch (Shortcut()) {
case SC_CLEAR: SettingsUpdateText(SET_MQTT_BUTTON_TOPIC, ""); break;
case SC_DEFAULT: SettingsUpdateText(SET_MQTT_BUTTON_TOPIC, TasmotaGlobal.mqtt_topic); break;
case SC_USER: SettingsUpdateText(SET_MQTT_BUTTON_TOPIC, MQTT_BUTTON_TOPIC); break;
default: SettingsUpdateText(SET_MQTT_BUTTON_TOPIC, XdrvMailbox.data);
}
}
ResponseCmndChar(SettingsText(SET_MQTT_BUTTON_TOPIC));
}
void CmndSwitchTopic(void) {
if (!XdrvMailbox.grpflg && (XdrvMailbox.data_len > 0)) {
MakeValidMqtt(0, XdrvMailbox.data);
if (!strcmp(XdrvMailbox.data, TasmotaGlobal.mqtt_client)) { SetShortcutDefault(); }
switch (Shortcut()) {
case SC_CLEAR: SettingsUpdateText(SET_MQTT_SWITCH_TOPIC, ""); break;
case SC_DEFAULT: SettingsUpdateText(SET_MQTT_SWITCH_TOPIC, TasmotaGlobal.mqtt_topic); break;
case SC_USER: SettingsUpdateText(SET_MQTT_SWITCH_TOPIC, PSTR(MQTT_SWITCH_TOPIC)); break;
default: SettingsUpdateText(SET_MQTT_SWITCH_TOPIC, XdrvMailbox.data);
}
}
ResponseCmndChar(SettingsText(SET_MQTT_SWITCH_TOPIC));
}
void CmndButtonRetain(void) {
if ((XdrvMailbox.payload >= 0) && (XdrvMailbox.payload <= 1)) {
if (!XdrvMailbox.payload) {
for (uint32_t i = 1; i <= MAX_KEYS; i++) {
SendKey(KEY_BUTTON, i, CLEAR_RETAIN); // Clear MQTT retain in broker
}
}
Settings.flag.mqtt_button_retain = XdrvMailbox.payload; // CMND_BUTTONRETAIN
}
ResponseCmndStateText(Settings.flag.mqtt_button_retain); // CMND_BUTTONRETAIN
}
void CmndSwitchRetain(void) {
if ((XdrvMailbox.payload >= 0) && (XdrvMailbox.payload <= 1)) {
if (!XdrvMailbox.payload) {
for (uint32_t i = 1; i <= MAX_SWITCHES; i++) {
SendKey(KEY_SWITCH, i, CLEAR_RETAIN); // Clear MQTT retain in broker
}
}
Settings.flag.mqtt_switch_retain = XdrvMailbox.payload; // CMND_SWITCHRETAIN
}
ResponseCmndStateText(Settings.flag.mqtt_switch_retain); // CMND_SWITCHRETAIN
}
void CmndPowerRetain(void) {
if ((XdrvMailbox.payload >= 0) && (XdrvMailbox.payload <= 1)) {
if (!XdrvMailbox.payload) {
char stemp1[TOPSZ];
char scommand[CMDSZ];
for (uint32_t i = 1; i <= TasmotaGlobal.devices_present; i++) { // Clear MQTT retain in broker
GetTopic_P(stemp1, STAT, TasmotaGlobal.mqtt_topic, GetPowerDevice(scommand, i, sizeof(scommand), Settings.flag.device_index_enable)); // SetOption26 - Switch between POWER or POWER1
ResponseClear();
MqttPublish(stemp1, Settings.flag.mqtt_power_retain); // CMND_POWERRETAIN
}
}
Settings.flag.mqtt_power_retain = XdrvMailbox.payload; // CMND_POWERRETAIN
if (Settings.flag.mqtt_power_retain) {
Settings.flag4.only_json_message = 0; // SetOption90 - Disable non-json MQTT response
}
}
ResponseCmndStateText(Settings.flag.mqtt_power_retain); // CMND_POWERRETAIN
}
void CmndSensorRetain(void) {
if ((XdrvMailbox.payload >= 0) && (XdrvMailbox.payload <= 1)) {
if (!XdrvMailbox.payload) {
ResponseClear();
MqttPublishPrefixTopic_P(TELE, PSTR(D_RSLT_SENSOR), Settings.flag.mqtt_sensor_retain); // CMND_SENSORRETAIN
MqttPublishPrefixTopic_P(TELE, PSTR(D_RSLT_ENERGY), Settings.flag.mqtt_sensor_retain); // CMND_SENSORRETAIN
}
Settings.flag.mqtt_sensor_retain = XdrvMailbox.payload; // CMND_SENSORRETAIN
}
ResponseCmndStateText(Settings.flag.mqtt_sensor_retain); // CMND_SENSORRETAIN
}
void CmndInfoRetain(void) {
if ((XdrvMailbox.payload >= 0) && (XdrvMailbox.payload <= 1)) {
if (!XdrvMailbox.payload) {
ResponseClear();
MqttPublishPrefixTopic_P(TELE, PSTR(D_RSLT_INFO), Settings.flag5.mqtt_info_retain); // CMND_INFORETAIN
}
Settings.flag5.mqtt_info_retain = XdrvMailbox.payload; // CMND_INFORETAIN
}
ResponseCmndStateText(Settings.flag5.mqtt_info_retain); // CMND_INFORETAIN
}
void CmndStateRetain(void) {
if ((XdrvMailbox.payload >= 0) && (XdrvMailbox.payload <= 1)) {
if (!XdrvMailbox.payload) {
ResponseClear();
MqttPublishPrefixTopic_P(STAT, PSTR(D_RSLT_STATE), Settings.flag5.mqtt_state_retain); // CMND_STATERETAIN
}
Settings.flag5.mqtt_state_retain = XdrvMailbox.payload; // CMND_STATERETAIN
}
ResponseCmndStateText(Settings.flag5.mqtt_state_retain); // CMND_STATERETAIN
}
/*********************************************************************************************\
* TLS private key and certificate - store into Flash
\*********************************************************************************************/
#if defined(USE_MQTT_TLS) && defined(USE_MQTT_AWS_IOT)
#ifdef ESP32
static uint8_t * tls_spi_start = nullptr;
const static size_t tls_spi_len = 0x0400; // 1kb blocs
const static size_t tls_block_offset = 0x0000; // don't need offset in FS
#else
// const static uint16_t tls_spi_start_sector = EEPROM_LOCATION + 4; // 0xXXFF
// const static uint8_t* tls_spi_start = (uint8_t*) ((tls_spi_start_sector * SPI_FLASH_SEC_SIZE) + 0x40200000); // 0x40XFF000
const static uint16_t tls_spi_start_sector = 0xFF; // Force last bank of first MB
const static uint8_t* tls_spi_start = (uint8_t*) 0x402FF000; // 0x402FF000
const static size_t tls_spi_len = 0x1000; // 4kb blocs
const static size_t tls_block_offset = 0x0400;
#endif
const static size_t tls_block_len = 0x0400; // 1kb
const static size_t tls_obj_store_offset = tls_block_offset + sizeof(tls_dir_t);
inline void TlsEraseBuffer(uint8_t *buffer) {
memset(buffer + tls_block_offset, 0xFF, tls_block_len);
}
// static data structures for Private Key and Certificate, only the pointer
// to binary data will change to a region in SPI Flash
static br_ec_private_key EC = {
23,
nullptr, 0
};
static br_x509_certificate CHAIN[] = {
{ nullptr, 0 }
};
// load a copy of the tls_dir from flash into ram
// and calculate the appropriate data structures for AWS_IoT_Private_Key and AWS_IoT_Client_Certificate
void loadTlsDir(void) {
#ifdef ESP32
// We load the file in RAM and use it as if it was in Flash. The buffer is never deallocated once we loaded TLS keys
AWS_IoT_Private_Key = nullptr;
AWS_IoT_Client_Certificate = nullptr;
if (TfsFileExists(TASM_FILE_TLSKEY)) {
if (tls_spi_start == nullptr){
tls_spi_start = (uint8_t*) malloc(tls_block_len);
if (tls_spi_start == nullptr) {
return;
}
}
TfsLoadFile(TASM_FILE_TLSKEY, tls_spi_start, tls_block_len);
} else {
return; // file does not exist, do nothing
}
#endif
memcpy_P(&tls_dir, tls_spi_start + tls_block_offset, sizeof(tls_dir));
// calculate the addresses for Key and Cert in Flash
if ((TLS_NAME_SKEY == tls_dir.entry[0].name) && (tls_dir.entry[0].len > 0)) {
EC.x = (unsigned char *)(tls_spi_start + tls_obj_store_offset + tls_dir.entry[0].start);
EC.xlen = tls_dir.entry[0].len;
AWS_IoT_Private_Key = &EC;
} else {
AWS_IoT_Private_Key = nullptr;
}
if ((TLS_NAME_CRT == tls_dir.entry[1].name) && (tls_dir.entry[1].len > 0)) {
CHAIN[0].data = (unsigned char *) (tls_spi_start + tls_obj_store_offset + tls_dir.entry[1].start);
CHAIN[0].data_len = tls_dir.entry[1].len;
AWS_IoT_Client_Certificate = CHAIN;
} else {
AWS_IoT_Client_Certificate = nullptr;
}
//Serial.printf("AWS_IoT_Private_Key = %x, AWS_IoT_Client_Certificate = %x\n", AWS_IoT_Private_Key, AWS_IoT_Client_Certificate);
}
const char ALLOCATE_ERROR[] PROGMEM = "TLSKey " D_JSON_ERROR ": cannot allocate buffer.";
void CmndTlsKey(void) {
#ifdef DEBUG_DUMP_TLS
if (0 == XdrvMailbox.index){
CmndTlsDump();
}
#endif // DEBUG_DUMP_TLS
if ((XdrvMailbox.index >= 1) && (XdrvMailbox.index <= 2)) {
tls_dir_t *tls_dir_write;
if (XdrvMailbox.data_len > 0) { // write new value
// first copy SPI buffer into ram
uint8_t *spi_buffer = (uint8_t*) malloc(tls_spi_len);
if (!spi_buffer) {
AddLog(LOG_LEVEL_ERROR, ALLOCATE_ERROR);
return;
}
if (tls_spi_start != nullptr) { // safeguard for ESP32
memcpy_P(spi_buffer, tls_spi_start, tls_spi_len);
} else {
memset(spi_buffer, 0, tls_spi_len); // safeguard for ESP32, removed by compiler for ESP8266
}
// remove any white space from the base64
RemoveSpace(XdrvMailbox.data);
// allocate buffer for decoded base64
uint32_t bin_len = decode_base64_length((unsigned char*)XdrvMailbox.data);
uint8_t *bin_buf = nullptr;
if (bin_len > 0) {
bin_buf = (uint8_t*) malloc(bin_len + 4);
if (!bin_buf) {
AddLog(LOG_LEVEL_ERROR, ALLOCATE_ERROR);
free(spi_buffer);
return;
}
}
// decode base64
if (bin_len > 0) {
decode_base64((unsigned char*)XdrvMailbox.data, bin_buf);
}
// address of writable tls_dir in buffer
tls_dir_write = (tls_dir_t*) (spi_buffer + tls_block_offset);
bool save_file = false; // for ESP32, do we need to write file
if (1 == XdrvMailbox.index) {
// Try to write Private key
// Start by erasing all
#ifdef ESP32
if (TfsFileExists(TASM_FILE_TLSKEY)) {
TfsDeleteFile(TASM_FILE_TLSKEY); // delete file
}
#else
TlsEraseBuffer(spi_buffer); // Erase any previously stored data
#endif
if (bin_len > 0) {
if (bin_len != 32) {
// no private key was previously stored, abort
AddLog(LOG_LEVEL_INFO, PSTR("TLSKey: Certificate must be 32 bytes: %d."), bin_len);
free(spi_buffer);
free(bin_buf);
return;
}
tls_entry_t *entry = &tls_dir_write->entry[0];
entry->name = TLS_NAME_SKEY;
entry->start = 0;
entry->len = bin_len;
memcpy(spi_buffer + tls_obj_store_offset + entry->start, bin_buf, entry->len);
save_file = true;
} else {
// if lenght is zero, simply erase this SPI flash area
}
} else if (2 == XdrvMailbox.index) {
// Try to write Certificate
if (TLS_NAME_SKEY != tls_dir.entry[0].name) {
// no private key was previously stored, abort
AddLog(LOG_LEVEL_INFO, PSTR("TLSKey: cannot store Cert if no Key previously stored."));
free(spi_buffer);
free(bin_buf);
return;
}
if (bin_len <= 256) {
// Certificate lenght too short
AddLog(LOG_LEVEL_INFO, PSTR("TLSKey: Certificate length too short: %d."), bin_len);
free(spi_buffer);
free(bin_buf);
return;
}
tls_entry_t *entry = &tls_dir_write->entry[1];
entry->name = TLS_NAME_CRT;
entry->start = (tls_dir_write->entry[0].start + tls_dir_write->entry[0].len + 3) & ~0x03; // align to 4 bytes boundary
entry->len = bin_len;
memcpy(spi_buffer + tls_obj_store_offset + entry->start, bin_buf, entry->len);
save_file = true;
}
#ifdef ESP32
if (save_file) {
TfsSaveFile(TASM_FILE_TLSKEY, spi_buffer, tls_spi_len);
}
#else
if (ESP.flashEraseSector(tls_spi_start_sector)) {
ESP.flashWrite(tls_spi_start_sector * SPI_FLASH_SEC_SIZE, (uint32_t*) spi_buffer, SPI_FLASH_SEC_SIZE);
}
#endif
free(spi_buffer);
free(bin_buf);
}
loadTlsDir(); // reload into memory any potential change
Response_P(PSTR("{\"%s1\":%d,\"%s2\":%d}"),
XdrvMailbox.command, AWS_IoT_Private_Key ? tls_dir.entry[0].len : -1,
XdrvMailbox.command, AWS_IoT_Client_Certificate ? tls_dir.entry[1].len : -1);
}
}
#ifdef DEBUG_DUMP_TLS
// Dump TLS Flash data - don't activate in production to protect your private keys
uint32_t bswap32(uint32_t x) {
return ((x << 24) & 0xff000000 ) |
((x << 8) & 0x00ff0000 ) |
((x >> 8) & 0x0000ff00 ) |
((x >> 24) & 0x000000ff );
}
void CmndTlsDump(void) {
if (tls_spi_start == nullptr) { return; } // safeguard for ESP32, removed by compiler for ESP8266
uint32_t start = (uint32_t)tls_spi_start + tls_block_offset;
uint32_t end = start + tls_block_len -1;
for (uint32_t pos = start; pos < end; pos += 0x10) {
uint32_t* values = (uint32_t*)(pos);
Serial.printf_P(PSTR("%08x: %08x %08x %08x %08x\n"), pos, bswap32(values[0]), bswap32(values[1]), bswap32(values[2]), bswap32(values[3]));
}
}
#endif // DEBUG_DUMP_TLS
#endif
/*********************************************************************************************\
* Presentation
\*********************************************************************************************/
#ifdef USE_WEBSERVER
#define WEB_HANDLE_MQTT "mq"
const char S_CONFIGURE_MQTT[] PROGMEM = D_CONFIGURE_MQTT;
const char HTTP_BTN_MENU_MQTT[] PROGMEM =
"<p><form action='" WEB_HANDLE_MQTT "' method='get'><button>" D_CONFIGURE_MQTT "</button></form></p>";
const char HTTP_FORM_MQTT1[] PROGMEM =
"<fieldset><legend><b>&nbsp;" D_MQTT_PARAMETERS "&nbsp;</b></legend>"
"<form method='get' action='" WEB_HANDLE_MQTT "'>"
"<p><b>" D_HOST "</b> (" MQTT_HOST ")<br><input id='mh' placeholder=\"" MQTT_HOST "\" value=\"%s\"></p>"
"<p><b>" D_PORT "</b> (" STR(MQTT_PORT) ")<br><input id='ml' placeholder='" STR(MQTT_PORT) "' value='%d'></p>"
#ifdef USE_MQTT_TLS
"<p><label><input id='b3' type='checkbox'%s><b>" D_MQTT_TLS_ENABLE "</b></label><br>"
#endif // USE_MQTT_TLS
"<p><b>" D_CLIENT "</b> (%s)<br><input id='mc' placeholder=\"%s\" value=\"%s\"></p>";
const char HTTP_FORM_MQTT2[] PROGMEM =
"<p><b>" D_USER "</b> (" MQTT_USER ")<br><input id='mu' placeholder=\"" MQTT_USER "\" value=\"%s\"></p>"
"<p><label><b>" D_PASSWORD "</b><input type='checkbox' onclick='sp(\"mp\")'></label><br><input id='mp' type='password' placeholder=\"" D_PASSWORD "\" value=\"" D_ASTERISK_PWD "\"></p>"
"<p><b>" D_TOPIC "</b> = %%topic%% (%s)<br><input id='mt' placeholder=\"%s\" value=\"%s\"></p>"
"<p><b>" D_FULL_TOPIC "</b> (%s)<br><input id='mf' placeholder=\"%s\" value=\"%s\"></p>";
void HandleMqttConfiguration(void)
{
if (!HttpCheckPriviledgedAccess()) { return; }
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_HTTP D_CONFIGURE_MQTT));
if (Webserver->hasArg(F("save"))) {
MqttSaveSettings();
WebRestart(1);
return;
}
char str[TOPSZ];
WSContentStart_P(PSTR(D_CONFIGURE_MQTT));
WSContentSendStyle();
WSContentSend_P(HTTP_FORM_MQTT1,
SettingsText(SET_MQTT_HOST),
Settings.mqtt_port,
#ifdef USE_MQTT_TLS
Mqtt.mqtt_tls ? PSTR(" checked") : "", // SetOption102 - Enable MQTT TLS
#endif // USE_MQTT_TLS
Format(str, PSTR(MQTT_CLIENT_ID), sizeof(str)), PSTR(MQTT_CLIENT_ID), SettingsText(SET_MQTT_CLIENT));
WSContentSend_P(HTTP_FORM_MQTT2,
(!strlen(SettingsText(SET_MQTT_USER))) ? "0" : SettingsText(SET_MQTT_USER),
Format(str, PSTR(MQTT_TOPIC), sizeof(str)), PSTR(MQTT_TOPIC), SettingsText(SET_MQTT_TOPIC),
PSTR(MQTT_FULLTOPIC), PSTR(MQTT_FULLTOPIC), SettingsText(SET_MQTT_FULLTOPIC));
WSContentSend_P(HTTP_FORM_END);
WSContentSpaceButton(BUTTON_CONFIGURATION);
WSContentStop();
}
void MqttSaveSettings(void) {
String cmnd = F(D_CMND_BACKLOG "0 ");
cmnd += AddWebCommand(PSTR(D_CMND_MQTTHOST), PSTR("mh"), PSTR("1"));
cmnd += AddWebCommand(PSTR(D_CMND_MQTTPORT), PSTR("ml"), PSTR("1"));
cmnd += AddWebCommand(PSTR(D_CMND_MQTTCLIENT), PSTR("mc"), PSTR("1"));
cmnd += AddWebCommand(PSTR(D_CMND_MQTTUSER), PSTR("mu"), PSTR("1"));
cmnd += AddWebCommand(PSTR(D_CMND_MQTTPASSWORD "2"), PSTR("mp"), PSTR("\""));
cmnd += AddWebCommand(PSTR(D_CMND_TOPIC), PSTR("mt"), PSTR("1"));
cmnd += AddWebCommand(PSTR(D_CMND_FULLTOPIC), PSTR("mf"), PSTR("1"));
#ifdef USE_MQTT_TLS
cmnd += F(";" D_CMND_SO "102 ");
cmnd += Webserver->hasArg(F("b3")); // SetOption102 - Enable MQTT TLS
#endif
ExecuteWebCommand((char*)cmnd.c_str());
}
#endif // USE_WEBSERVER
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xdrv02(uint8_t function)
{
bool result = false;
if (Settings.flag.mqtt_enabled) { // SetOption3 - Enable MQTT
switch (function) {
case FUNC_EVERY_50_MSECOND: // https://github.com/knolleary/pubsubclient/issues/556
MqttClient.loop();
break;
#ifdef USE_WEBSERVER
case FUNC_WEB_ADD_BUTTON:
WSContentSend_P(HTTP_BTN_MENU_MQTT);
break;
case FUNC_WEB_ADD_HANDLER:
WebServer_on(PSTR("/" WEB_HANDLE_MQTT), HandleMqttConfiguration);
break;
#endif // USE_WEBSERVER
case FUNC_COMMAND:
result = DecodeCommand(kMqttCommands, MqttCommand, kMqttSynonyms);
break;
case FUNC_PRE_INIT:
MqttInit();
break;
}
}
return result;
}
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