Milestone 5: deliver embedded RDP sessions and lifecycle hardening

third_party/FreeRDP/channels/disp/disp_common.c

@@ -0,0 +1,55 @@
+/**
+ * FreeRDP: A Remote Desktop Protocol Implementation
+ * RDPEDISP Virtual Channel Extension
+ *
+ * Copyright 2019 Kobi Mizrachi <kmizrachi18@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <freerdp/config.h>
+
+#include <winpr/crt.h>
+#include <winpr/stream.h>
+#include <freerdp/channels/log.h>
+
+#define TAG CHANNELS_TAG("disp.common")
+
+#include "disp_common.h"
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+UINT disp_read_header(wStream* s, DISPLAY_CONTROL_HEADER* header)
+{
+	if (!Stream_CheckAndLogRequiredLength(TAG, s, 8))
+		return ERROR_INVALID_DATA;
+
+	Stream_Read_UINT32(s, header->type);
+	Stream_Read_UINT32(s, header->length);
+	return CHANNEL_RC_OK;
+}
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+UINT disp_write_header(wStream* s, const DISPLAY_CONTROL_HEADER* header)
+{
+	Stream_Write_UINT32(s, header->type);
+	Stream_Write_UINT32(s, header->length);
+	return CHANNEL_RC_OK;
+}