Add QUdpSocket::setMulticastInterface() and ::multicastInterface()

This API allows the programmer to set/query the outgoing interface for
multicast packets for the socket. Both functions need an initialized
socket to work.

Autotest updated to test setting each interface in the system as the
multicast interface for IPv4 and IPv6 UDP sockets.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/network/socket/qsocks5socketengine.cpp b/src/network/socket/qsocks5socketengine.cpp
index dcaf561..17cf5b1 100644
--- a/src/network/socket/qsocks5socketengine.cpp
+++ b/src/network/socket/qsocks5socketengine.cpp
@@ -56,6 +56,7 @@
 #include "qurl.h"
 #include "qauthenticator.h"
 #include <qendian.h>
+#include <qnetworkinterface.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -1560,6 +1561,19 @@ bool QSocks5SocketEngine::leaveMulticastGroup(const QHostAddress &,
     return false;
 }
 
+
+QNetworkInterface QSocks5SocketEngine::multicastInterface() const
+{
+    return QNetworkInterface();
+}
+
+bool QSocks5SocketEngine::setMulticastInterface(const QNetworkInterface &)
+{
+    setError(QAbstractSocket::UnsupportedSocketOperationError,
+             QLatin1String("Operation on socket is not supported"));
+    return false;
+}
+
 qint64 QSocks5SocketEngine::readDatagram(char *data, qint64 maxlen, QHostAddress *addr,
                                         quint16 *port)
 {