Implement QUdpSocket::joinMulticastGroup() and leaveMulticastGroup()

This is actually just done in the socket engine, so we need to add the
API for setting the loopback socket option and joining/leaving the
group. Implementation for the various engines will follow.

1 files changed, 10 insertions, 1 deletions

diff --git a/src/network/socket/qabstractsocketengine_p.h b/src/network/socket/qabstractsocketengine_p.h
index 3669852..9a2a7c3 100644
--- a/src/network/socket/qabstractsocketengine_p.h
+++ b/src/network/socket/qabstractsocketengine_p.h
@@ -61,6 +61,7 @@ QT_BEGIN_NAMESPACE
 
 class QAuthenticator;
 class QAbstractSocketEnginePrivate;
+class QNetworkInterface;
 class QNetworkProxy;
 
 class QAbstractSocketEngineReceiver {
@@ -94,7 +95,8 @@ public:
         BindExclusively,
         ReceiveOutOfBandData,
         LowDelayOption,
-        KeepAliveOption
+        KeepAliveOption,
+        MulticastLoopback
     };
 
     virtual bool initialize(QAbstractSocket::SocketType type, QAbstractSocket::NetworkLayerProtocol protocol = QAbstractSocket::IPv4Protocol) = 0;
@@ -118,6 +120,13 @@ public:
     virtual qint64 write(const char *data, qint64 len) = 0;
 
 #ifndef QT_NO_UDPSOCKET
+    virtual bool joinMulticastGroup(const QHostAddress &groupAddress,
+                                    const QHostAddress &sourceAddress,
+                                    const QNetworkInterface &interface) = 0;
+    virtual bool leaveMulticastGroup(const QHostAddress &groupAddress,
+                                     const QHostAddress &sourceAddress,
+                                     const QNetworkInterface &interface) = 0;
+
     virtual qint64 readDatagram(char *data, qint64 maxlen, QHostAddress *addr = 0,
                                 quint16 *port = 0) = 0;
     virtual qint64 writeDatagram(const char *data, qint64 len, const QHostAddress &addr,