Add up, isUp, and down methods to PackageInterface

LICENSE

@@ -37,3 +37,6 @@ modifications made are documented below:
   method on PackageInterface.
 
 - Modified UDPServer class to expose a stop() method
+
+- Added up(), isUp(), and down() methods to PackageInterface to allow
+  for starting, checking, and stopping the radius server from code

src/interface.ts

@@ -1,6 +1,9 @@
 import * as radius from 'radius';
-import * as config from '../config';
+import * as gblConfig from '../config';
 import { IPacket } from './types/PacketHandler';
+import {Authentication} from "./auth";
+import {UDPServer} from "./server/UDPServer";
+import {RadiusService} from "./radius/RadiusService";
 
 export type PacketDecoder = (msg: Buffer) => {
 	packet?: radius.RadiusPacket & IPacket;
@@ -30,7 +33,9 @@ export default class PackageInterface {
 
 	public logger: (...any: unknown[]) => unknown = console.log; // eslint-disable-line no-console
 
-	private config: any = config;
+	private config: any = gblConfig;
+
+	private server?: UDPServer;
 
 	public log(...any: unknown[]): void {
 		this.logger(...any);
@@ -44,4 +49,47 @@ export default class PackageInterface {
 	public setConfig(inConfig: any) {
 		this.config = inConfig;
 	}
+
+	public async up(): Promise<void> {
+		const config = this.getConfig();
+		const AuthMechanismus = (await import(`./auth/${config.authentication}`))[
+			config.authentication
+		];
+
+		const auth = new AuthMechanismus(config.authenticationOptions);
+		const authentication = new Authentication(auth);
+		this.server = new UDPServer(config.port);
+		const radiusService = new RadiusService(config.secret, authentication);
+
+		this.server.on('message', async (msg, rinfo) => {
+			const response = await radiusService.handleMessage(msg);
+
+			if (response && this.server) {
+				this.server.sendToClient(
+					response.data,
+					rinfo.port,
+					rinfo.address,
+					(err, _bytes) => {
+						if (err) {
+							this.log('Error sending response to ', rinfo);
+						}
+					},
+					response.expectAcknowledgment
+				);
+			}
+		});
+
+		await this.server.start();
+	}
+
+	public isUp(): boolean {
+		return !!this.server;
+	}
+
+	public async down(): Promise<void> {
+		if (this.server) {
+			await this.server.stop();
+			this.server = undefined;
+		}
+	}
 }