Update ZpClient.js

Handle mDNS advertisements for `_sonos._tcp.`, see #209.

lib/ZpClient.js

@@ -1135,26 +1135,28 @@ class ZpClient extends homebridgeLib.HttpClient {
     this._reSubscribing = false
   }
 
-  /** Handle an UPnP message.
+  /** Handle an mDNS or UPnP message that a zone player is alive.
     *
     * - Update {@link ZpClient#lastSeen lastSeen}.
     * - Update {@link ZpClient#address address} when the zone player's IP
     * address has changed.
     * - Call {@link ZpClient#init init()} when {@link ZpClient#bootSeq bootSeq}
     * has changed.
-    * @param {string} address - The IP address from which the UPnP message
-    * was received.
-    * @param {object} message - The parsed UPnP message.
-    */
-  async handleUpnpMessage (address, message) {
-    if (this._props.id != null && message.usn.split(':')[1] !== this._props.id) {
+    * @param {object} message - The message.
+    * @param {string} message.id - The zone player ID.
+    * @param {string} message.address - The zone player IP address.
+    * @param {string} message.household - The zone player household.
+    * @param {interget} message.bootseq - The zone player boot sequence.
+    */
+  async handleAliveMessage (message) {
+    if (this._props.id != null && message.id !== this._props.id) {
       return
     }
-    if (this._props.household !== message['x-rincon-household']) {
-      this._props.household = message['x-rincon-household']
+    if (this._props.household !== message.household) {
+      this._props.household = message.household
     }
-    this._checkAddress(address)
-    await this._checkBootSeq(parseInt(message['x-rincon-bootseq']))
+    this._checkAddress(message.address)
+    await this._checkBootSeq(message.bootseq)
     await this._updateLastSeen()
   }