src/main.js

@@ -82,22 +82,9 @@ if(errorMsg){
 
     logger.debug("Attaching error-logger..");
     const loggerTcpdump = logFactory("tcpdump");
-    let linkTypeId;
     proc.stderr.setEncoding("utf8").on("data", (data) => {
         if(!data.match(/^(tcpdump: )?listening on /i) || !data.match(/^\d+ packets captured/i)) {  // Catch start-error
             loggerTcpdump.debug(data);
-
-            if(!linkTypeId && data.match(/^(tcpdump: )?listening on/i)){   // Grab first data containing listen-info if proper header was found
-                const linkType = data.match(/((?<=link-type ))([a-z].*?) \(.*?\)(?=,)/i)[0];
-                const linkTypeData = linkType.match(/(\S*) (.*)/i);
-                const linkTypeId = linkTypeData[1];
-                const linkTypeDetail = linkTypeData[2];
-    
-                if(linkTypeId !== "IEEE802_11_RADIO"){
-                    logger.error(`Interface not in Monitor-mode! (Expected 'IEEE802_11_RADIO', but got '${linkTypeId}')`);
-                    shutdown(1, "SIGKILL");
-                }
-            }
         }
         else loggerTcpdump.error(data);
     });
@@ -130,22 +117,17 @@ if(errorMsg){
         loggerTcpdump.debug(`tcpdump exited code: ${code}`);
         if (code) {
             loggerTcpdump.fatal(`tcpdump exited with non-zero code: ${code}`);
-            if(!exitCode) exitCode = 1;     // When exitCode is 0, set to 1
+            exit(1);
         }
         logger.info("Shutdown");
-        exit(exitCode);
+        exit(0);
     });
 
     // Handle stop-signals for graceful shutdown
-    var exitCode = 0;
     function shutdownReq() {
         logger.info("Shutdown request received..");
-        shutdown();
-    }
-    function shutdown(code, signal = "SIGTERM"){
-        if(code) exitCode = code;
         logger.debug("Stopping subprocess tcpdump, then exiting myself..");
-        proc.kill(signal);    // Kill process, then upper event-handler will stop self
+        proc.kill();    // Kill process (send SIGTERM), then upper event-handler will stop self
     }
     process.on("SIGTERM", shutdownReq);
     process.on("SIGINT", shutdownReq);