sforkowany z mirror/meshtastic-firmware
568 wiersze
24 KiB
C++
568 wiersze
24 KiB
C++
#include "MQTT.h"
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#include "MeshService.h"
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#include "NodeDB.h"
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#include "PowerFSM.h"
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#include "main.h"
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#include "mesh/Channels.h"
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#include "mesh/Router.h"
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#include "mesh/generated/meshtastic/mqtt.pb.h"
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#include "mesh/generated/meshtastic/telemetry.pb.h"
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#include "mesh/http/WiFiAPClient.h"
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#include "sleep.h"
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#if HAS_WIFI
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#include <WiFi.h>
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#endif
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#include "mqtt/JSON.h"
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#include <assert.h>
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const int reconnectMax = 5;
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MQTT *mqtt;
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static MemoryDynamic<meshtastic_ServiceEnvelope> staticMqttPool;
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Allocator<meshtastic_ServiceEnvelope> &mqttPool = staticMqttPool;
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void MQTT::mqttCallback(char *topic, byte *payload, unsigned int length)
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{
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mqtt->onPublish(topic, payload, length);
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}
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void MQTT::onPublish(char *topic, byte *payload, unsigned int length)
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{
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// parsing ServiceEnvelope
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meshtastic_ServiceEnvelope e = meshtastic_ServiceEnvelope_init_default;
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if (moduleConfig.mqtt.json_enabled && (strncmp(topic, jsonTopic.c_str(), jsonTopic.length()) == 0)) {
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// check if this is a json payload message by comparing the topic start
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char payloadStr[length + 1];
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memcpy(payloadStr, payload, length);
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payloadStr[length] = 0; // null terminated string
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JSONValue *json_value = JSON::Parse(payloadStr);
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if (json_value != NULL) {
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LOG_INFO("JSON Received on MQTT, parsing..\n");
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// check if it is a valid envelope
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JSONObject json;
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json = json_value->AsObject();
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// parse the channel name from the topic string
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char *ptr = strtok(topic, "/");
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for (int i = 0; i < 3; i++) {
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ptr = strtok(NULL, "/");
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}
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meshtastic_Channel sendChannel = channels.getByName(ptr);
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LOG_DEBUG("Found Channel name: %s (Index %d)\n", channels.getGlobalId(sendChannel.index), sendChannel.index);
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if ((json.find("sender") != json.end()) && (json.find("payload") != json.end()) &&
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(json.find("type") != json.end()) && json["type"]->IsString() &&
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(json["type"]->AsString().compare("sendtext") == 0)) {
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// this is a valid envelope
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if (json["payload"]->IsString() && json["type"]->IsString() &&
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(json["sender"]->AsString().compare(owner.id) != 0)) {
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std::string jsonPayloadStr = json["payload"]->AsString();
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LOG_INFO("JSON payload %s, length %u\n", jsonPayloadStr.c_str(), jsonPayloadStr.length());
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// construct protobuf data packet using TEXT_MESSAGE, send it to the mesh
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meshtastic_MeshPacket *p = router->allocForSending();
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p->decoded.portnum = meshtastic_PortNum_TEXT_MESSAGE_APP;
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p->channel = sendChannel.index;
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if (sendChannel.settings.downlink_enabled) {
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if (jsonPayloadStr.length() <= sizeof(p->decoded.payload.bytes)) {
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memcpy(p->decoded.payload.bytes, jsonPayloadStr.c_str(), jsonPayloadStr.length());
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p->decoded.payload.size = jsonPayloadStr.length();
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meshtastic_MeshPacket *packet = packetPool.allocCopy(*p);
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service.sendToMesh(packet, RX_SRC_LOCAL);
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} else {
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LOG_WARN("Received MQTT json payload too long, dropping\n");
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}
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} else {
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LOG_WARN("Received MQTT json payload on channel %s, but downlink is disabled, dropping\n",
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sendChannel.settings.name);
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}
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} else {
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LOG_DEBUG("JSON Ignoring downlink message we originally sent.\n");
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}
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} else if ((json.find("sender") != json.end()) && (json.find("payload") != json.end()) &&
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(json.find("type") != json.end()) && json["type"]->IsString() &&
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(json["type"]->AsString().compare("sendposition") == 0)) {
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// invent the "sendposition" type for a valid envelope
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if (json["payload"]->IsObject() && json["type"]->IsString() &&
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(json["sender"]->AsString().compare(owner.id) != 0)) {
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JSONObject posit;
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posit = json["payload"]->AsObject(); // get nested JSON Position
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meshtastic_Position pos = meshtastic_Position_init_default;
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pos.latitude_i = posit["latitude_i"]->AsNumber();
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pos.longitude_i = posit["longitude_i"]->AsNumber();
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pos.altitude = posit["altitude"]->AsNumber();
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pos.time = posit["time"]->AsNumber();
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// construct protobuf data packet using POSITION, send it to the mesh
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meshtastic_MeshPacket *p = router->allocForSending();
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p->decoded.portnum = meshtastic_PortNum_POSITION_APP;
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p->channel = sendChannel.index;
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if (sendChannel.settings.downlink_enabled) {
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p->decoded.payload.size =
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pb_encode_to_bytes(p->decoded.payload.bytes, sizeof(p->decoded.payload.bytes),
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&meshtastic_Position_msg, &pos); // make the Data protobuf from position
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service.sendToMesh(p, RX_SRC_LOCAL);
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} else {
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LOG_WARN("Received MQTT json payload on channel %s, but downlink is disabled, dropping\n",
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sendChannel.settings.name);
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}
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} else {
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LOG_DEBUG("JSON Ignoring downlink message we originally sent.\n");
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}
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} else {
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LOG_ERROR("JSON Received payload on MQTT but not a valid envelope\n");
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}
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} else {
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// no json, this is an invalid payload
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LOG_ERROR("Invalid MQTT service envelope, topic %s, len %u!\n", topic, length);
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}
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delete json_value;
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} else {
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if (!pb_decode_from_bytes(payload, length, &meshtastic_ServiceEnvelope_msg, &e)) {
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LOG_ERROR("Invalid MQTT service envelope, topic %s, len %u!\n", topic, length);
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return;
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} else {
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if (strcmp(e.gateway_id, owner.id) == 0)
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LOG_INFO("Ignoring downlink message we originally sent.\n");
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else {
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if (e.packet) {
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LOG_INFO("Received MQTT topic %s, len=%u\n", topic, length);
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meshtastic_MeshPacket *p = packetPool.allocCopy(*e.packet);
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// ignore messages sent by us or if we don't have the channel key
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if (router && p->from != nodeDB.getNodeNum() && perhapsDecode(p))
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router->enqueueReceivedMessage(p);
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else
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packetPool.release(p);
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}
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}
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}
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// make sure to free both strings and the MeshPacket (passing in NULL is acceptable)
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free(e.channel_id);
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free(e.gateway_id);
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free(e.packet);
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}
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}
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void mqttInit()
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{
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new MQTT();
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}
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MQTT::MQTT() : concurrency::OSThread("mqtt"), pubSub(mqttClient), mqttQueue(MAX_MQTT_QUEUE)
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{
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if (moduleConfig.mqtt.enabled) {
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assert(!mqtt);
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mqtt = this;
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if (*moduleConfig.mqtt.root) {
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statusTopic = moduleConfig.mqtt.root + statusTopic;
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cryptTopic = moduleConfig.mqtt.root + cryptTopic;
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jsonTopic = moduleConfig.mqtt.root + jsonTopic;
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} else {
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statusTopic = "msh" + statusTopic;
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cryptTopic = "msh" + cryptTopic;
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jsonTopic = "msh" + jsonTopic;
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}
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pubSub.setCallback(mqttCallback);
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// preflightSleepObserver.observe(&preflightSleep);
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} else {
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disable();
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}
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}
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bool MQTT::connected()
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{
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return pubSub.connected();
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}
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void MQTT::reconnect()
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{
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if (wantsLink()) {
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// Defaults
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int serverPort = 1883;
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const char *serverAddr = default_mqtt_address;
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const char *mqttUsername = default_mqtt_username;
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const char *mqttPassword = default_mqtt_password;
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if (*moduleConfig.mqtt.address) {
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serverAddr = moduleConfig.mqtt.address;
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mqttUsername = moduleConfig.mqtt.username;
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mqttPassword = moduleConfig.mqtt.password;
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}
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#if HAS_WIFI && !defined(ARCH_PORTDUINO)
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if (moduleConfig.mqtt.tls_enabled) {
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// change default for encrypted to 8883
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try {
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serverPort = 8883;
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wifiSecureClient.setInsecure();
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pubSub.setClient(wifiSecureClient);
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LOG_INFO("Using TLS-encrypted session\n");
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} catch (const std::exception &e) {
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LOG_ERROR("MQTT ERROR: %s\n", e.what());
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}
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} else {
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LOG_INFO("Using non-TLS-encrypted session\n");
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pubSub.setClient(mqttClient);
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}
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#else
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pubSub.setClient(mqttClient);
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#endif
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String server = String(serverAddr);
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int delimIndex = server.indexOf(':');
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if (delimIndex > 0) {
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String port = server.substring(delimIndex + 1, server.length());
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server[delimIndex] = 0;
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serverPort = port.toInt();
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serverAddr = server.c_str();
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}
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pubSub.setServer(serverAddr, serverPort);
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pubSub.setBufferSize(512);
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LOG_INFO("Connecting to MQTT server %s, port: %d, username: %s, password: %s\n", serverAddr, serverPort, mqttUsername,
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mqttPassword);
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auto myStatus = (statusTopic + owner.id);
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bool connected = pubSub.connect(owner.id, mqttUsername, mqttPassword, myStatus.c_str(), 1, true, "offline");
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if (connected) {
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LOG_INFO("MQTT connected\n");
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enabled = true; // Start running background process again
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runASAP = true;
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reconnectCount = 0;
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/// FIXME, include more information in the status text
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bool ok = pubSub.publish(myStatus.c_str(), "online", true);
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LOG_INFO("published %d\n", ok);
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sendSubscriptions();
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} else {
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#if HAS_WIFI && !defined(ARCH_PORTDUINO)
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reconnectCount++;
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LOG_ERROR("Failed to contact MQTT server (%d/%d)...\n", reconnectCount, reconnectMax);
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if (reconnectCount >= reconnectMax) {
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needReconnect = true;
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wifiReconnect->setIntervalFromNow(0);
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reconnectCount = 0;
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}
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#endif
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}
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}
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}
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void MQTT::sendSubscriptions()
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{
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size_t numChan = channels.getNumChannels();
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for (size_t i = 0; i < numChan; i++) {
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auto &ch = channels.getByIndex(i);
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if (ch.settings.downlink_enabled) {
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std::string topic = cryptTopic + channels.getGlobalId(i) + "/#";
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LOG_INFO("Subscribing to %s\n", topic.c_str());
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pubSub.subscribe(topic.c_str(), 1); // FIXME, is QOS 1 right?
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if (moduleConfig.mqtt.json_enabled == true) {
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std::string topicDecoded = jsonTopic + channels.getGlobalId(i) + "/#";
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LOG_INFO("Subscribing to %s\n", topicDecoded.c_str());
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pubSub.subscribe(topicDecoded.c_str(), 1); // FIXME, is QOS 1 right?
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}
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}
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}
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}
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bool MQTT::wantsLink() const
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{
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bool hasChannel = false;
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if (moduleConfig.mqtt.enabled) {
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// No need for link if no channel needed it
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size_t numChan = channels.getNumChannels();
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for (size_t i = 0; i < numChan; i++) {
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auto &ch = channels.getByIndex(i);
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if (ch.settings.uplink_enabled || ch.settings.downlink_enabled) {
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hasChannel = true;
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break;
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}
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}
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}
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#if HAS_WIFI
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return hasChannel && WiFi.isConnected();
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#endif
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#if HAS_ETHERNET
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return hasChannel && (Ethernet.linkStatus() == LinkON);
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#endif
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return false;
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}
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int32_t MQTT::runOnce()
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{
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if (!moduleConfig.mqtt.enabled) {
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return disable();
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}
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bool wantConnection = wantsLink();
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// If connected poll rapidly, otherwise only occasionally check for a wifi connection change and ability to contact server
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if (!pubSub.loop()) {
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if (wantConnection) {
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reconnect();
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// If we succeeded, empty the queue one by one and start reading rapidly, else try again in 30 seconds (TCP
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// connections are EXPENSIVE so try rarely)
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if (pubSub.connected()) {
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if (!mqttQueue.isEmpty()) {
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// FIXME - this size calculation is super sloppy, but it will go away once we dynamically alloc meshpackets
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meshtastic_ServiceEnvelope *env = mqttQueue.dequeuePtr(0);
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static uint8_t bytes[meshtastic_MeshPacket_size + 64];
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size_t numBytes = pb_encode_to_bytes(bytes, sizeof(bytes), &meshtastic_ServiceEnvelope_msg, env);
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std::string topic = cryptTopic + env->channel_id + "/" + owner.id;
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LOG_INFO("publish %s, %u bytes from queue\n", topic.c_str(), numBytes);
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pubSub.publish(topic.c_str(), bytes, numBytes, false);
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if (moduleConfig.mqtt.json_enabled) {
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// handle json topic
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auto jsonString = this->downstreamPacketToJson(env->packet);
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if (jsonString.length() != 0) {
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std::string topicJson = jsonTopic + env->channel_id + "/" + owner.id;
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LOG_INFO("JSON publish message to %s, %u bytes: %s\n", topicJson.c_str(), jsonString.length(),
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jsonString.c_str());
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pubSub.publish(topicJson.c_str(), jsonString.c_str(), false);
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}
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}
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mqttPool.release(env);
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}
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return 200;
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} else {
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return 30000;
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}
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} else
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return 5000; // If we don't want connection now, check again in 5 secs
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} else {
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// we are connected to server, check often for new requests on the TCP port
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if (!wantConnection) {
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LOG_INFO("MQTT link not needed, dropping\n");
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pubSub.disconnect();
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}
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powerFSM.trigger(EVENT_CONTACT_FROM_PHONE); // Suppress entering light sleep (because that would turn off bluetooth)
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return 20;
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}
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}
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void MQTT::onSend(const meshtastic_MeshPacket &mp, ChannelIndex chIndex)
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{
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auto &ch = channels.getByIndex(chIndex);
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if (ch.settings.uplink_enabled) {
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const char *channelId = channels.getGlobalId(chIndex); // FIXME, for now we just use the human name for the channel
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meshtastic_ServiceEnvelope *env = mqttPool.allocZeroed();
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env->channel_id = (char *)channelId;
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env->gateway_id = owner.id;
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env->packet = (meshtastic_MeshPacket *)∓
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// don't bother sending if not connected...
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if (pubSub.connected()) {
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// FIXME - this size calculation is super sloppy, but it will go away once we dynamically alloc meshpackets
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static uint8_t bytes[meshtastic_MeshPacket_size + 64];
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size_t numBytes = pb_encode_to_bytes(bytes, sizeof(bytes), &meshtastic_ServiceEnvelope_msg, env);
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std::string topic = cryptTopic + channelId + "/" + owner.id;
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LOG_DEBUG("publish %s, %u bytes\n", topic.c_str(), numBytes);
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pubSub.publish(topic.c_str(), bytes, numBytes, false);
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if (moduleConfig.mqtt.json_enabled) {
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// handle json topic
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auto jsonString = this->downstreamPacketToJson((meshtastic_MeshPacket *)&mp);
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if (jsonString.length() != 0) {
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std::string topicJson = jsonTopic + channelId + "/" + owner.id;
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LOG_INFO("JSON publish message to %s, %u bytes: %s\n", topicJson.c_str(), jsonString.length(),
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jsonString.c_str());
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pubSub.publish(topicJson.c_str(), jsonString.c_str(), false);
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}
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}
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} else {
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LOG_INFO("MQTT not connected, queueing packet\n");
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if (mqttQueue.numFree() == 0) {
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LOG_WARN("NOTE: MQTT queue is full, discarding oldest\n");
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meshtastic_ServiceEnvelope *d = mqttQueue.dequeuePtr(0);
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if (d)
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mqttPool.release(d);
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}
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// make a copy of serviceEnvelope and queue it
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meshtastic_ServiceEnvelope *copied = mqttPool.allocCopy(*env);
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assert(mqttQueue.enqueue(copied, 0));
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}
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mqttPool.release(env);
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}
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}
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// converts a downstream packet into a json message
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std::string MQTT::downstreamPacketToJson(meshtastic_MeshPacket *mp)
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{
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// the created jsonObj is immutable after creation, so
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// we need to do the heavy lifting before assembling it.
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std::string msgType;
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JSONObject msgPayload;
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JSONObject jsonObj;
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switch (mp->decoded.portnum) {
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case meshtastic_PortNum_TEXT_MESSAGE_APP: {
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msgType = "text";
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// convert bytes to string
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LOG_DEBUG("got text message of size %u\n", mp->decoded.payload.size);
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char payloadStr[(mp->decoded.payload.size) + 1];
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memcpy(payloadStr, mp->decoded.payload.bytes, mp->decoded.payload.size);
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payloadStr[mp->decoded.payload.size] = 0; // null terminated string
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// check if this is a JSON payload
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JSONValue *json_value = JSON::Parse(payloadStr);
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if (json_value != NULL) {
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LOG_INFO("text message payload is of type json\n");
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// if it is, then we can just use the json object
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jsonObj["payload"] = json_value;
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} else {
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// if it isn't, then we need to create a json object
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// with the string as the value
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LOG_INFO("text message payload is of type plaintext\n");
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msgPayload["text"] = new JSONValue(payloadStr);
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jsonObj["payload"] = new JSONValue(msgPayload);
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}
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break;
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}
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case meshtastic_PortNum_TELEMETRY_APP: {
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msgType = "telemetry";
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meshtastic_Telemetry scratch;
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meshtastic_Telemetry *decoded = NULL;
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if (mp->which_payload_variant == meshtastic_MeshPacket_decoded_tag) {
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memset(&scratch, 0, sizeof(scratch));
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if (pb_decode_from_bytes(mp->decoded.payload.bytes, mp->decoded.payload.size, &meshtastic_Telemetry_msg, &scratch)) {
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decoded = &scratch;
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if (decoded->which_variant == meshtastic_Telemetry_device_metrics_tag) {
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msgPayload["battery_level"] = new JSONValue((int)decoded->variant.device_metrics.battery_level);
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msgPayload["voltage"] = new JSONValue(decoded->variant.device_metrics.voltage);
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msgPayload["channel_utilization"] = new JSONValue(decoded->variant.device_metrics.channel_utilization);
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msgPayload["air_util_tx"] = new JSONValue(decoded->variant.device_metrics.air_util_tx);
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} else if (decoded->which_variant == meshtastic_Telemetry_environment_metrics_tag) {
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msgPayload["temperature"] = new JSONValue(decoded->variant.environment_metrics.temperature);
|
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msgPayload["relative_humidity"] = new JSONValue(decoded->variant.environment_metrics.relative_humidity);
|
|
msgPayload["barometric_pressure"] = new JSONValue(decoded->variant.environment_metrics.barometric_pressure);
|
|
msgPayload["gas_resistance"] = new JSONValue(decoded->variant.environment_metrics.gas_resistance);
|
|
msgPayload["voltage"] = new JSONValue(decoded->variant.environment_metrics.voltage);
|
|
msgPayload["current"] = new JSONValue(decoded->variant.environment_metrics.current);
|
|
}
|
|
jsonObj["payload"] = new JSONValue(msgPayload);
|
|
} else {
|
|
LOG_ERROR("Error decoding protobuf for telemetry message!\n");
|
|
}
|
|
};
|
|
break;
|
|
}
|
|
case meshtastic_PortNum_NODEINFO_APP: {
|
|
msgType = "nodeinfo";
|
|
meshtastic_User scratch;
|
|
meshtastic_User *decoded = NULL;
|
|
if (mp->which_payload_variant == meshtastic_MeshPacket_decoded_tag) {
|
|
memset(&scratch, 0, sizeof(scratch));
|
|
if (pb_decode_from_bytes(mp->decoded.payload.bytes, mp->decoded.payload.size, &meshtastic_User_msg, &scratch)) {
|
|
decoded = &scratch;
|
|
msgPayload["id"] = new JSONValue(decoded->id);
|
|
msgPayload["longname"] = new JSONValue(decoded->long_name);
|
|
msgPayload["shortname"] = new JSONValue(decoded->short_name);
|
|
msgPayload["hardware"] = new JSONValue(decoded->hw_model);
|
|
jsonObj["payload"] = new JSONValue(msgPayload);
|
|
} else {
|
|
LOG_ERROR("Error decoding protobuf for nodeinfo message!\n");
|
|
}
|
|
};
|
|
break;
|
|
}
|
|
case meshtastic_PortNum_POSITION_APP: {
|
|
msgType = "position";
|
|
meshtastic_Position scratch;
|
|
meshtastic_Position *decoded = NULL;
|
|
if (mp->which_payload_variant == meshtastic_MeshPacket_decoded_tag) {
|
|
memset(&scratch, 0, sizeof(scratch));
|
|
if (pb_decode_from_bytes(mp->decoded.payload.bytes, mp->decoded.payload.size, &meshtastic_Position_msg, &scratch)) {
|
|
decoded = &scratch;
|
|
if ((int)decoded->time) {
|
|
msgPayload["time"] = new JSONValue((int)decoded->time);
|
|
}
|
|
if ((int)decoded->timestamp) {
|
|
msgPayload["timestamp"] = new JSONValue((int)decoded->timestamp);
|
|
}
|
|
msgPayload["latitude_i"] = new JSONValue((int)decoded->latitude_i);
|
|
msgPayload["longitude_i"] = new JSONValue((int)decoded->longitude_i);
|
|
if ((int)decoded->altitude) {
|
|
msgPayload["altitude"] = new JSONValue((int)decoded->altitude);
|
|
}
|
|
if ((int)decoded->ground_speed) {
|
|
msgPayload["ground_speed"] = new JSONValue((int)decoded->ground_speed);
|
|
}
|
|
if (int(decoded->ground_track)) {
|
|
msgPayload["ground_track"] = new JSONValue((int)decoded->ground_track);
|
|
}
|
|
if (int(decoded->sats_in_view)) {
|
|
msgPayload["sats_in_view"] = new JSONValue((int)decoded->sats_in_view);
|
|
}
|
|
jsonObj["payload"] = new JSONValue(msgPayload);
|
|
} else {
|
|
LOG_ERROR("Error decoding protobuf for position message!\n");
|
|
}
|
|
};
|
|
break;
|
|
}
|
|
|
|
case meshtastic_PortNum_WAYPOINT_APP: {
|
|
msgType = "position";
|
|
meshtastic_Waypoint scratch;
|
|
meshtastic_Waypoint *decoded = NULL;
|
|
if (mp->which_payload_variant == meshtastic_MeshPacket_decoded_tag) {
|
|
memset(&scratch, 0, sizeof(scratch));
|
|
if (pb_decode_from_bytes(mp->decoded.payload.bytes, mp->decoded.payload.size, &meshtastic_Waypoint_msg, &scratch)) {
|
|
decoded = &scratch;
|
|
msgPayload["id"] = new JSONValue((int)decoded->id);
|
|
msgPayload["name"] = new JSONValue(decoded->name);
|
|
msgPayload["description"] = new JSONValue(decoded->description);
|
|
msgPayload["expire"] = new JSONValue((int)decoded->expire);
|
|
msgPayload["locked_to"] = new JSONValue((int)decoded->locked_to);
|
|
msgPayload["latitude_i"] = new JSONValue((int)decoded->latitude_i);
|
|
msgPayload["longitude_i"] = new JSONValue((int)decoded->longitude_i);
|
|
jsonObj["payload"] = new JSONValue(msgPayload);
|
|
} else {
|
|
LOG_ERROR("Error decoding protobuf for position message!\n");
|
|
}
|
|
};
|
|
break;
|
|
}
|
|
// add more packet types here if needed
|
|
default:
|
|
break;
|
|
}
|
|
|
|
jsonObj["id"] = new JSONValue((int)mp->id);
|
|
jsonObj["timestamp"] = new JSONValue((int)mp->rx_time);
|
|
jsonObj["to"] = new JSONValue((int)mp->to);
|
|
jsonObj["from"] = new JSONValue((int)mp->from);
|
|
jsonObj["channel"] = new JSONValue((int)mp->channel);
|
|
jsonObj["type"] = new JSONValue(msgType.c_str());
|
|
jsonObj["sender"] = new JSONValue(owner.id);
|
|
|
|
// serialize and write it to the stream
|
|
JSONValue *value = new JSONValue(jsonObj);
|
|
std::string jsonStr = value->Stringify();
|
|
|
|
LOG_INFO("serialized json message: %s\n", jsonStr.c_str());
|
|
|
|
delete value;
|
|
return jsonStr;
|
|
} |