net_server: Clients can now check if a service is running.

* Using the new kMsgIsServiceRunning command.

headers/private/net/NetServer.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2010, Haiku, Inc. All Rights Reserved.
+ * Copyright 2006-2015, Haiku, Inc. All Rights Reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -20,6 +20,7 @@
 #define kMsgJoinNetwork				'JNnw'
 #define kMsgLeaveNetwork			'LVnw'
 #define kMsgAutoJoinNetwork			'AJnw'
+#define kMsgIsServiceRunning		'IRsv'
 
 
 #endif	// _NET_SERVER_H

src/servers/net/NetServer.cpp

@@ -304,6 +304,15 @@ NetServer::MessageReceived(BMessage* message)
 			break;
 		}
 
+		case kMsgIsServiceRunning:
+		{
+			// Forward the message to the handler that can answer it
+			BHandler* handler = fServices.Target(NULL);
+			if (handler != NULL)
+				handler->MessageReceived(message);
+			break;
+		}
+
 		default:
 			BApplication::MessageReceived(message);
 			return;

src/servers/net/Services.cpp

@@ -22,6 +22,8 @@
 #include <NetworkAddress.h>
 #include <NetworkSettings.h>
 
+#include <NetServer.h>
+
 
 using namespace std;
 using namespace BNetworkKit;
@@ -196,6 +198,19 @@ Services::MessageReceived(BMessage* message)
 			_Update(*message);
 			break;
 
+		case kMsgIsServiceRunning:
+		{
+			const char* name = message->GetString("name");
+			if (name == NULL)
+				break;
+
+			BMessage reply(B_REPLY);
+			reply.AddString("name", name);
+			reply.AddBool("running", fNameMap.find(name) != fNameMap.end());
+			message->SendReply(&reply);
+			break;
+		}
+
 		default:
 			BHandler::MessageReceived(message);
 	}