FreeRDP/server/proxy/pf_context.h

/**
 * FreeRDP: A Remote Desktop Protocol Implementation
 * FreeRDP Proxy Server
 *
 * Copyright 2019 Mati Shabtay <matishabtay@gmail.com>
 * Copyright 2019 Kobi Mizrachi <kmizrachi18@gmail.com>
 * Copyright 2019 Idan Freiberg <speidy@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.
 */

#ifndef FREERDP_SERVER_PROXY_PFCONTEXT_H
#define FREERDP_SERVER_PROXY_PFCONTEXT_H

#include <freerdp/freerdp.h>
#include <freerdp/channels/wtsvc.h>
#include <freerdp/client/rdpei.h>
#include <freerdp/client/rail.h>
#include <freerdp/server/rail.h>
#include <freerdp/client/rdpgfx.h>
#include <freerdp/server/rdpgfx.h>
#include <freerdp/client/disp.h>
#include <freerdp/server/disp.h>
#include <freerdp/server/cliprdr.h>
#include <freerdp/server/rdpsnd.h>

#include "pf_config.h"
#include "pf_server.h"

#define PROXY_SESSION_ID_LENGTH 32

typedef struct proxy_data proxyData;

/**
 * Wraps rdpContext and holds the state for the proxy's server.
 */
struct p_server_context
{
	rdpContext context;

	proxyData* pdata;

	HANDLE vcm;
	HANDLE dynvcReady;

	RailServerContext* rail;
	RdpgfxServerContext* gfx;
	DispServerContext* disp;
	CliprdrServerContext* cliprdr;
	RdpsndServerContext* rdpsnd;

	HANDLE* vc_handles; /* static virtual channels open handles */
	wHashTable* vc_ids; /* channel_name -> channel_id map */
};
typedef struct p_server_context pServerContext;

/**
 * Wraps rdpContext and holds the state for the proxy's client.
 */
struct p_client_context
{
	rdpContext context;

	proxyData* pdata;

	RdpeiClientContext* rdpei;
	RdpgfxClientContext* gfx_proxy;
	RdpgfxClientContext* gfx_decoder;
	DispClientContext* disp;
	CliprdrClientContext* cliprdr;
	RailClientContext* rail;

	/*
	 * In a case when freerdp_connect fails,
	 * Used for NLA fallback feature, to check if the server should close the connection.
	 * When it is set to TRUE, proxy's client knows it shouldn't signal the server thread to
	 * closed the connection when pf_client_post_disconnect is called, because it is trying to
	 * connect reconnect without NLA. It must be set to TRUE before the first try, and to FALSE
	 * after the connection fully established, to ensure graceful shutdown of the connection
	 * when it will be closed.
	 */
	BOOL allow_next_conn_failure;

	wHashTable* vc_ids; /* channel_name -> channel_id map */
};
typedef struct p_client_context pClientContext;

/**
 * Holds data common to both sides of a proxy's session.
 */
struct proxy_data
{
	proxyConfig* config;

	pServerContext* ps;
	pClientContext* pc;

	HANDLE abort_event;
	HANDLE client_thread;
	HANDLE gfx_server_ready;

	char session_id[PROXY_SESSION_ID_LENGTH + 1];

	/* used to external modules to store per-session info */
	wHashTable* modules_info;
};

BOOL pf_context_copy_settings(rdpSettings* dst, const rdpSettings* src);
BOOL pf_context_init_server_context(freerdp_peer* client);
pClientContext* pf_context_create_client_context(rdpSettings* clientSettings);

proxyData* proxy_data_new(void);
void proxy_data_set_client_context(proxyData* pdata, pClientContext* context);
void proxy_data_set_server_context(proxyData* pdata, pServerContext* context);
void proxy_data_free(proxyData* pdata);

BOOL proxy_data_shall_disconnect(proxyData* pdata);
void proxy_data_abort_connect(proxyData* pdata);

#endif /* FREERDP_SERVER_PROXY_PFCONTEXT_H */