452 lines
15 KiB
JavaScript
452 lines
15 KiB
JavaScript
const crypto = require("crypto");
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const path = require("path");
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const mqtt = require("mqtt");
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const protobufjs = require("protobufjs");
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// create prisma db client
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const { PrismaClient } = require("@prisma/client");
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const prisma = new PrismaClient();
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// create mqtt client
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const client = mqtt.connect("mqtt://mqtt.meshtastic.org", {
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username: "meshdev",
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password: "large4cats",
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});
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// load protobufs
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const root = new protobufjs.Root();
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root.resolvePath = (origin, target) => path.join(__dirname, "protos", target);
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root.loadSync('meshtastic/mqtt.proto');
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const Data = root.lookupType("Data");
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const ServiceEnvelope = root.lookupType("ServiceEnvelope");
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const MapReport = root.lookupType("MapReport");
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const NeighborInfo = root.lookupType("NeighborInfo");
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const Position = root.lookupType("Position");
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const RouteDiscovery = root.lookupType("RouteDiscovery");
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const Telemetry = root.lookupType("Telemetry");
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const User = root.lookupType("User");
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const Waypoint = root.lookupType("Waypoint");
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function createNonce(packetId, fromNode) {
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// Expand packetId to 64 bits
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const packetId64 = BigInt(packetId);
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// Initialize block counter (32-bit, starts at zero)
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const blockCounter = 0;
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// Create a buffer for the nonce
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const buf = Buffer.alloc(16);
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// Write packetId, fromNode, and block counter to the buffer
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buf.writeBigUInt64LE(packetId64, 0);
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buf.writeUInt32LE(fromNode, 8);
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buf.writeUInt32LE(blockCounter, 12);
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return buf;
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}
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/**
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* References:
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* https://github.com/crypto-smoke/meshtastic-go/blob/develop/radio/aes.go#L42
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* https://github.com/pdxlocations/Meshtastic-MQTT-Connect/blob/main/meshtastic-mqtt-connect.py#L381
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*/
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function decrypt(packet) {
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try {
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// default encryption key
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const key = Buffer.from("1PG7OiApB1nwvP+rz05pAQ==", "base64");
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// create decryption iv/nonce for this packet
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const nonceBuffer = createNonce(packet.id, packet.from);
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// create aes-128-ctr decipher
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const decipher = crypto.createDecipheriv('aes-128-ctr', key, nonceBuffer);
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// decrypt encrypted packet
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const decryptedBuffer = Buffer.concat([decipher.update(packet.encrypted), decipher.final()]);
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// parse as data message
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return Data.decode(decryptedBuffer);
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} catch(e) {
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return null;
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}
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}
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// subscribe to everything when connected
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client.on("connect", () => {
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client.subscribe("#");
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});
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// handle message received
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client.on("message", async (topic, message) => {
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try {
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// decode service envelope
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const envelope = ServiceEnvelope.decode(message);
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if(!envelope.packet){
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return;
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}
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// create service envelope in db
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try {
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await prisma.serviceEnvelope.create({
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data: {
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mqtt_topic: topic,
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channel_id: envelope.channelId,
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gateway_id: envelope.gatewayId ? BigInt('0x' + envelope.gatewayId.replaceAll("!", "")) : null, // convert hex id "!f96a92f0" to bigint
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to: envelope.packet.to,
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from: envelope.packet.from,
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protobuf: message,
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},
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});
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} catch (e) {
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console.error(e, {
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envelope: envelope.packet,
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});
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}
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// attempt to decrypt encrypted packets
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const isEncrypted = envelope.packet.encrypted?.length > 0;
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if(isEncrypted){
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const decoded = decrypt(envelope.packet);
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if(decoded){
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envelope.packet.decoded = decoded;
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}
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}
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const logKnownPacketTypes = false;
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const logUnknownPacketTypes = false;
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const portnum = envelope.packet?.decoded?.portnum;
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if(portnum === 1) {
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if(logKnownPacketTypes) {
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console.log("TEXT_MESSAGE_APP", {
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to: envelope.packet.to.toString(16),
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from: envelope.packet.from.toString(16),
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text: envelope.packet.decoded.payload.toString(),
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});
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}
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try {
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await prisma.textMessage.create({
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data: {
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to: envelope.packet.to,
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from: envelope.packet.from,
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channel: envelope.packet.channel,
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packet_id: envelope.packet.id,
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channel_id: envelope.channelId,
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gateway_id: envelope.gatewayId ? BigInt('0x' + envelope.gatewayId.replaceAll("!", "")) : null, // convert hex id "!f96a92f0" to bigint
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text: envelope.packet.decoded.payload.toString(),
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rx_time: envelope.packet.rxTime,
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rx_snr: envelope.packet.rxSnr,
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rx_rssi: envelope.packet.rxRssi,
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hop_limit: envelope.packet.hopLimit,
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},
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});
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} catch (e) {
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console.error(e);
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}
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}
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else if(portnum === 3) {
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const position = Position.decode(envelope.packet.decoded.payload);
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if(logKnownPacketTypes){
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console.log("POSITION_APP", {
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from: envelope.packet.from.toString(16),
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position: position,
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});
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}
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// update node position in db
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if(position.latitudeI != null && position.longitudeI){
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try {
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await prisma.node.updateMany({
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where: {
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node_id: envelope.packet.from,
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},
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data: {
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latitude: position.latitudeI,
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longitude: position.longitudeI,
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altitude: position.altitude !== 0 ? position.altitude : null,
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},
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});
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} catch (e) {
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console.error(e);
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}
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}
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}
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else if(portnum === 4) {
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const user = User.decode(envelope.packet.decoded.payload);
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if(logKnownPacketTypes) {
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console.log("NODEINFO_APP", {
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from: envelope.packet.from.toString(16),
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user: user,
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});
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}
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// create or update node in db
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try {
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await prisma.node.upsert({
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where: {
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node_id: envelope.packet.from,
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},
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create: {
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node_id: envelope.packet.from,
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long_name: user.longName,
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short_name: user.shortName,
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hardware_model: user.hwModel,
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is_licensed: user.isLicensed === true,
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role: user.role,
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},
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update: {
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long_name: user.longName,
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short_name: user.shortName,
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hardware_model: user.hwModel,
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is_licensed: user.isLicensed === true,
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role: user.role,
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},
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});
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} catch (e) {
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console.error(e);
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}
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}
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else if(portnum === 8) {
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const waypoint = Waypoint.decode(envelope.packet.decoded.payload);
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if(logKnownPacketTypes) {
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console.log("WAYPOINT_APP", {
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to: envelope.packet.to.toString(16),
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from: envelope.packet.from.toString(16),
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waypoint: waypoint,
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});
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}
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try {
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await prisma.waypoint.create({
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data: {
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to: envelope.packet.to,
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from: envelope.packet.from,
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waypoint_id: waypoint.id,
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latitude: waypoint.latitudeI,
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longitude: waypoint.longitudeI,
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expire: waypoint.expire,
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locked_to: waypoint.lockedTo,
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name: waypoint.name,
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description: waypoint.description,
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icon: waypoint.icon,
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channel: envelope.packet.channel,
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packet_id: envelope.packet.id,
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channel_id: envelope.channelId,
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gateway_id: envelope.gatewayId ? BigInt('0x' + envelope.gatewayId.replaceAll("!", "")) : null, // convert hex id "!f96a92f0" to bigint
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},
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});
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} catch (e) {
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console.error(e);
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}
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}
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else if(portnum === 71) {
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const neighbourInfo = NeighborInfo.decode(envelope.packet.decoded.payload);
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if(logKnownPacketTypes) {
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console.log("NEIGHBORINFO_APP", {
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from: envelope.packet.from.toString(16),
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neighbour_info: neighbourInfo,
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});
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}
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try {
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await prisma.neighbourInfo.create({
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data: {
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node_id: envelope.packet.from,
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node_broadcast_interval_secs: neighbourInfo.nodeBroadcastIntervalSecs,
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neighbours: neighbourInfo.neighbors.map((neighbour) => {
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return {
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node_id: neighbour.nodeId,
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snr: neighbour.snr,
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};
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}),
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},
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});
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} catch (e) {
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console.error(e);
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}
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}
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else if(portnum === 67) {
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const telemetry = Telemetry.decode(envelope.packet.decoded.payload);
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if(logKnownPacketTypes) {
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console.log("TELEMETRY_APP", {
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from: envelope.packet.from.toString(16),
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telemetry: telemetry,
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});
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}
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// data to update
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const data = {};
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// handle device metrics
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if(telemetry.deviceMetrics){
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data.battery_level = telemetry.deviceMetrics.batteryLevel !== 0 ? telemetry.deviceMetrics.batteryLevel : null;
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data.voltage = telemetry.deviceMetrics.voltage !== 0 ? telemetry.deviceMetrics.voltage : null;
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data.channel_utilization = telemetry.deviceMetrics.channelUtilization !== 0 ? telemetry.deviceMetrics.channelUtilization : null;
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data.air_util_tx = telemetry.deviceMetrics.airUtilTx !== 0 ? telemetry.deviceMetrics.airUtilTx : null;
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// create device metric
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try {
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// find an existing metric with duplicate information created in the last 15 seconds
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const existingDuplicateDeviceMetric = await prisma.deviceMetric.findFirst({
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where: {
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node_id: envelope.packet.from,
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battery_level: data.battery_level,
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voltage: data.voltage,
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channel_utilization: data.channel_utilization,
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air_util_tx: data.air_util_tx,
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created_at: {
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gte: new Date(Date.now() - 15000), // created in the last 15 seconds
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},
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}
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})
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// create metric if no duplicates found
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if(!existingDuplicateDeviceMetric){
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await prisma.deviceMetric.create({
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data: {
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node_id: envelope.packet.from,
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battery_level: data.battery_level,
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voltage: data.voltage,
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channel_utilization: data.channel_utilization,
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air_util_tx: data.air_util_tx,
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},
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});
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}
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} catch (e) {
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console.error(e);
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}
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}
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// update node telemetry in db
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if(Object.keys(data).length > 0){
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try {
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await prisma.node.updateMany({
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where: {
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node_id: envelope.packet.from,
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},
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data: data,
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});
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} catch (e) {
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console.error(e);
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}
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}
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}
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else if(portnum === 70) {
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const routeDiscovery = RouteDiscovery.decode(envelope.packet.decoded.payload);
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if(logKnownPacketTypes) {
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console.log("TRACEROUTE_APP", {
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from: envelope.packet.from.toString(16),
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route_discovery: routeDiscovery,
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});
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}
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try {
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await prisma.traceRoute.create({
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data: {
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node_id: envelope.packet.from,
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route: routeDiscovery.route,
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},
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});
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} catch (e) {
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console.error(e);
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}
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}
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else if(portnum === 73) {
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const mapReport = MapReport.decode(envelope.packet.decoded.payload);
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if(logKnownPacketTypes) {
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console.log("MAP_REPORT_APP", {
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from: envelope.packet.from.toString(16),
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map_report: mapReport,
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});
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}
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try {
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await prisma.mapReport.create({
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data: {
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node_id: envelope.packet.from,
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long_name: mapReport.longName,
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short_name: mapReport.shortName,
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role: mapReport.role,
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hardware_model: mapReport.hwModel,
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firmware_version: mapReport.firmwareVersion,
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region: mapReport.region,
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modem_preset: mapReport.modemPreset,
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has_default_channel: mapReport.hasDefaultChannel,
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latitude: mapReport.latitudeI,
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longitude: mapReport.longitudeI,
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altitude: mapReport.altitude,
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position_precision: mapReport.positionPrecision,
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num_online_local_nodes: mapReport.numOnlineLocalNodes,
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},
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});
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} catch (e) {
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console.error(e);
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}
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}
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else {
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if(logUnknownPacketTypes){
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// ignore packets we don't want to see for now
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if(portnum === undefined // ignore failed to decrypt
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|| portnum === 0 // ignore UNKNOWN_APP
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|| portnum === 1 // ignore TEXT_MESSAGE_APP
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|| portnum === 5 // ignore ROUTING_APP
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|| portnum === 34 // ignore PAXCOUNTER_APP
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|| portnum === 65 // ignore STORE_FORWARD_APP
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|| portnum === 66 // ignore RANGE_TEST_APP
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|| portnum === 72 // ignore ATAK_PLUGIN
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){
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return;
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}
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console.log(portnum, envelope);
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}
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}
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} catch(e) {
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// ignore errors
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}
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});
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