Milestone 5: deliver embedded RDP sessions and lifecycle hardening

2026-03-03 18:59:26 -07:00
parent 230a401386
commit 36006bd4aa
2941 changed files with 724359 additions and 77 deletions
--- a/third_party/FreeRDP/server/shadow/shadow_encomsp.c
+++ b/third_party/FreeRDP/server/shadow/shadow_encomsp.c
@@ -0,0 +1,138 @@
+/**
+ * FreeRDP: A Remote Desktop Protocol Implementation
+ *
+ * Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>
+ * Copyright 2015 Thincast Technologies GmbH
+ * Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.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 <freerdp/log.h>
+#include "shadow.h"
+
+#include "shadow_encomsp.h"
+
+#define TAG SERVER_TAG("shadow")
+
+/**
+ * Function description
+ *
+ * @return 0 on success, otherwise a Win32 error code
+ */
+WINPR_ATTR_NODISCARD
+static UINT
+encomsp_change_participant_control_level(EncomspServerContext* context,
+                                         ENCOMSP_CHANGE_PARTICIPANT_CONTROL_LEVEL_PDU* pdu)
+{
+	BOOL inLobby = 0;
+	BOOL mayView = 0;
+	BOOL mayInteract = 0;
+	rdpShadowClient* client = (rdpShadowClient*)context->custom;
+
+	WLog_INFO(TAG,
+	          "ChangeParticipantControlLevel: ParticipantId: %" PRIu32 " Flags: 0x%04" PRIX16 "",
+	          pdu->ParticipantId, pdu->Flags);
+
+	mayView = (pdu->Flags & ENCOMSP_MAY_VIEW) != 0;
+	mayInteract = (pdu->Flags & ENCOMSP_MAY_INTERACT) != 0;
+
+	if (mayInteract && !mayView)
+		mayView = TRUE; /* may interact implies may view */
+
+	if (mayInteract)
+	{
+		if (!client->mayInteract)
+		{
+			/* request interact + view */
+			client->mayInteract = TRUE;
+			client->mayView = TRUE;
+		}
+	}
+	else if (mayView)
+	{
+		if (client->mayInteract)
+		{
+			/* release interact */
+			client->mayInteract = FALSE;
+		}
+		else if (!client->mayView)
+		{
+			/* request view */
+			client->mayView = TRUE;
+		}
+	}
+	else
+	{
+		if (client->mayInteract)
+		{
+			/* release interact + view */
+			client->mayView = FALSE;
+			client->mayInteract = FALSE;
+		}
+		else if (client->mayView)
+		{
+			/* release view */
+			client->mayView = FALSE;
+			client->mayInteract = FALSE;
+		}
+	}
+
+	inLobby = !(client->mayView);
+
+	if (inLobby != client->inLobby)
+	{
+		if (shadow_encoder_reset(client->encoder) < 0)
+			return ERROR_NOT_READY;
+		client->inLobby = inLobby;
+	}
+
+	return CHANNEL_RC_OK;
+}
+
+int shadow_client_encomsp_init(rdpShadowClient* client)
+{
+	WINPR_ASSERT(client);
+
+	EncomspServerContext* encomsp = client->encomsp = encomsp_server_context_new(client->vcm);
+	if (!encomsp)
+		return -1;
+
+	encomsp->rdpcontext = &client->context;
+
+	encomsp->custom = (void*)client;
+
+	encomsp->ChangeParticipantControlLevel = encomsp_change_participant_control_level;
+
+	if (client->encomsp)
+	{
+		const UINT rc = client->encomsp->Start(client->encomsp);
+		if (rc != CHANNEL_RC_OK)
+			return -1;
+	}
+
+	return 1;
+}
+
+void shadow_client_encomsp_uninit(rdpShadowClient* client)
+{
+	WINPR_ASSERT(client);
+	if (client->encomsp)
+	{
+		client->encomsp->Stop(client->encomsp);
+		encomsp_server_context_free(client->encomsp);
+		client->encomsp = nullptr;
+	}
+}