1 files changed, 118 insertions, 0 deletions
diff --git a/src/VBox/GuestHost/OpenGL/util/devnull.c b/src/VBox/GuestHost/OpenGL/util/devnull.c
new file mode 100644
index 00000000..9e7d9618
--- /dev/null
+++ b/src/VBox/GuestHost/OpenGL/util/devnull.c
@@ -0,0 +1,118 @@
+/* Copyright (c) 2001, Stanford University
+ * All rights reserved
+ *
+ * See the file LICENSE.txt for information on redistributing this software.
+ */
+
+#include "cr_net.h"
+#include "cr_mem.h"
+#include "cr_error.h"
+#include "net_internals.h"
+
+static void
+crDevnullWriteExact( CRConnection *conn, const void *buf, unsigned int len )
+{
+	(void) conn;
+	(void) buf;
+	(void) len;
+}
+
+static void *
+crDevnullAlloc( CRConnection *conn )
+{
+	return crAlloc( conn->buffer_size );
+}
+
+static void
+crDevnullSingleRecv( CRConnection *conn, void *buf, unsigned int len )
+{
+	crError( "You can't receive data on a devnull connection!" );
+	(void) conn;
+	(void) buf;
+	(void) len;
+}
+
+static void
+crDevnullFree( CRConnection *conn, void *buf )
+{
+	crFree( buf );
+	(void) conn;
+}
+
+static void
+crDevnullSend( CRConnection *conn, void **bufp,
+				 const void *start, unsigned int len )
+{
+	
+	if (bufp)
+	{
+		/* We're sending something we've allocated.  It's now ours. 
+		 * If the callers wants to send something else, he'll allocate 
+		 * something else. 
+		 * 
+		 * ENFORCE IT! */
+
+		crDevnullFree( conn, *bufp );
+	}
+	(void) conn;
+	(void) bufp;
+	(void) start;
+	(void) len;
+}
+
+int
+crDevnullRecv( void )
+{
+	crError( "You can't receive data on a DevNull network, stupid." );
+	return 0;
+}
+
+void
+crDevnullInit( CRNetReceiveFuncList *rfl, CRNetCloseFuncList *cfl, unsigned int mtu )
+{
+	(void) rfl;
+	(void) cfl;
+	(void) mtu;
+}
+
+static void
+crDevnullAccept( CRConnection *conn, const char *hostname, unsigned short port )
+{
+	crError( "Well, you *could* accept a devnull client, but you'd be disappointed. ");
+	(void) conn;
+	(void) port;
+        (void) hostname;
+}
+
+static int
+crDevnullDoConnect( CRConnection *conn )
+{
+	(void) conn; 
+	return 1;
+}
+
+static void
+crDevnullDoDisconnect( CRConnection *conn )
+{
+	(void) conn;
+}
+
+void crDevnullConnection( CRConnection *conn )
+{
+	conn->type  = CR_DROP_PACKETS;
+	conn->Alloc = crDevnullAlloc;
+	conn->Send  = crDevnullSend;
+	conn->SendExact  = crDevnullWriteExact;
+	conn->Recv  = crDevnullSingleRecv;
+	conn->Free  = crDevnullFree;
+	conn->Accept = crDevnullAccept;
+	conn->Connect = crDevnullDoConnect;
+	conn->Disconnect = crDevnullDoDisconnect;
+	conn->actual_network = 0;
+}
+
+CRConnection** crDevnullDump( int * num )
+{
+	*num = 0;
+	return NULL;
+}