bonjour: fix no messages received on Linux

UDP multicast on Linux is quite different from Windows. We have to allow all addresses for each network interface, otherwise we don't receive any data.

Author: dlech

CHANGELOG.md

@@ -6,6 +6,7 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how
 ## Unreleased
 ### Fixed
 - Fix "Timed out while waiting for handshake" error
+- Fix not working on Linux without Avahi installed
 
 ## 1.0.3 - 2019-03-25
 ### Changed

src/dnssd/bonjour.ts

@@ -79,12 +79,17 @@ class BonjourClient extends events.EventEmitter implements dnssd.Client {
      * @param ifaceAddress the IP address
      */
     private createClient(ifaceIndex: number, ifaceAddress: string): void {
+        // On Windows, we need the full IP address as part of the multicast socket
+        // interface or things don't work right. On Linux, we have to strip the
+        // IP address or things don't work right.
+        const iface = (os.platform() === 'win32') ? ifaceAddress : ifaceAddress.replace(/.*%/,'::%');
+
         // work around bonjour issue where error is not handled
         new Promise<bonjour.Bonjour>((resolve, reject) => {
             const bClient = bonjour(<any> {
                 type: 'udp6',
                 ip: 'ff02::fb',
-                interface: ifaceAddress
+                interface: iface,
             });
             (<any>bClient)['iface'] = ifaceIndex;
             (<any> bClient)._server.mdns.on('ready', () => resolve(bClient));