Activating strict-mode

This will properly set e.g. arrays

src/main.js

@@ -1,10 +1,18 @@
+"use strict";
 const logger = require("./helper/logger.js")("main");
 
 const { requireEnvVars } = require("./helper/env.js");
 const { exit } = require("process");
+const { exec } = require("./helper/exec.js");
+
 const { InfluxDB } = require('@influxdata/influxdb-client');
 const InfluxChecks = require('./helper/influx-checks.js');
 
+const { RegexBlockStream } = require("./streamHandler/RegexBlockStream.js");
+const { PacketStreamFactory } = require("./streamHandler/PacketStreamFactory.js");
+const { PacketInfluxPointFactory } = require("./streamHandler/PacketInfluxPointFactory.js");
+const { InfluxPointWriter } = require("./streamHandler/InfluxPointWriter.js");
+
 /// Setup ENVs
 const env = process.env;
 // Defaults
@@ -46,4 +54,34 @@ if(errorMsg){
 
   logger.info("Influx ok");
 
+  logger.info("Starting tcpdump..");
+  const TCPDUMP_BASECMD = "tcpdump -vvv -e -n -X -s0 -i"
+  let cmd = `sudo ${TCPDUMP_BASECMD} ${env.WIFI_INTERFACE}`;
+
+  let proc = exec(cmd);
+  logger.debug("Creating & Attaching streams..");
+  proc.stdout
+    .setEncoding("utf8")
+    .pipe(new RegexBlockStream(/^[0-9]{2}:[0-9]{2}:[0-9]{2}.[0-9]{6}.*(\n( {4,8}|\t\t?).*){1,}\n/gm))
+    .pipe(new PacketStreamFactory())
+    .pipe(new PacketInfluxPointFactory())
+    .pipe(new InfluxPointWriter(influxDb, env.INFLUX_ORG, env.INFLUX_BUCKET));
+
+  logger.debug("Attaching error-logger..");
+  proc.stderr.setEncoding("utf8").on("data", (data) => {
+    logger.error(data);
+  });
+
+  logger.debug("Attaching exit-handler..");
+  proc.on("exit", (code) => {
+    logger.info(`tcpdump exited code: ${code}`);
+    if (code) {
+      logger.fatal(`tcpdump exited with non-zero code: ${code}`);
+      exit(1);
+    }
+    logger.info("Shutdown");
+    exit(0);
+  });
+
+  logger.info("Startup complete");
 })();

src/streamHandler/PacketInfluxPointFactory.js

@@ -37,13 +37,16 @@ class PacketInfluxPointFactory extends Transform{
     _transform(packet, encoding, next){
         // Create measurements
         MEASUREMENT_MAP.forEach((objKey, measurement) => {
-            if(!Object.keys(packet).includes(objKey)) return;
+            if(packet[objKey] == null) return;
 
             let point = new Point(measurement);     // Create point
             
             // Set tags
-            TAG_LIST.filter(tag => Object.keys(packet).includes(tag))
-                    .forEach(tag => point.tag(tag, packet[tag]));
+            TAG_LIST.filter(tag => Object.keys(packet).includes(tag))   // Filter tags available on object
+                    .filter(tag => packet[tag] != null)                         // Filter tags not falsy on object
+                    .forEach(tag => {
+                        tagObjectRecursively(point, tag, packet[tag]);
+                    });
 
             point.setField('value', packet[objKey]);        // Set field
 
@@ -54,6 +57,15 @@ class PacketInfluxPointFactory extends Transform{
     }
 }
 
+function tagObjectRecursively(point, tag, field, suffix = ""){
+    if(typeof(field) == "object"){
+        // TODO: Convert boolean-arrays like "packet.flags" to key: value
+        Object.entries(field).map(([key, value]) => {
+            tagObjectRecursively(point, tag, value, `_${key}${suffix}`);
+        });
+    }
+    else point.tag(tag+suffix, field);
+}
 
 /** Mapping for type -> field-method */
 const POINT_FIELD_TYPE = new Map([