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/*
 *  Copyright (c) 2000-2019 Samsung Electronics Co., Ltd. All rights reserved
 *
 *  Contact: Dongsun Lee <ds73.lee@samsung.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
 */
/*
 * @file        generic-socket-manager.h
 * @author      Bartlomiej Grzelewski (b.grzelewski@samsung.com)
 * @author      Zofia Abramowska (z.abramowska@samsung.com)
 * @version     1.0
 * @brief       Implementation of GenericSocketService and GenericSocketManager.
 */

#ifndef _CENT_KEY_MNG_GENERIC_SERVICE_MANAGER_
#define _CENT_KEY_MNG_GENERIC_SERVICE_MANAGER_

#include <vector>
#include <string>

#include <sys/types.h>

#include <dpl/exception.h>
#include <generic-event.h>
#include <dpl/raw-buffer.h>
#include <ckm/ckm-type.h>
#include <credentials.h>
#include <service-messages.h>

extern "C" {
	struct msghdr;
} // extern "C"

namespace CKM {

typedef int InterfaceID;

struct ConnectionID {
	int sock;                                 // This is decriptor used for connection
	int counter;                              // Unique handler per socket
	inline bool operator<(const ConnectionID &second) const
	{
		return counter < second.counter;
	}
};

struct GenericSocketManager;

struct GenericSocketService {
	typedef std::string ServiceHandlerPath;
	struct ServiceDescription {
		ServiceDescription(const char *path,
						   const char *privilege,
						   InterfaceID interfaceID = 0,
						   bool useSendMsg = false) :
			privilege(privilege),
			interfaceID(interfaceID),
			serviceHandlerPath(path),
			useSendMsg(useSendMsg) {}

		std::string privilege;

		// All data from serviceHandlerPath will be marked with this interfaceHandler
		InterfaceID interfaceID;

		// Path to file
		ServiceHandlerPath serviceHandlerPath;
		bool useSendMsg;
	};

	typedef std::vector<ServiceDescription> ServiceDescriptionVector;

	struct AcceptEvent : public GenericEvent {
		ConnectionID connectionID;
		InterfaceID interfaceID;
		Credentials credentials;
	};

	struct WriteEvent : public GenericEvent {
		ConnectionID connectionID;
		size_t size;
		size_t left;
	};

	struct ReadEvent : public GenericEvent {
		ConnectionID connectionID;
		RawBuffer rawBuffer;
	};

	struct CloseEvent : public GenericEvent {
		ConnectionID connectionID;
	};

	struct SecurityEvent : public GenericEvent {
		ConnectionID connectionID;
		bool allowed;
	};

	virtual void SetSocketManager(GenericSocketManager *manager)
	{
		m_serviceManager = manager;
	}

	virtual void SetCommManager(CommMgr *manager)
	{
		m_commMgr = manager;
	}

	virtual ServiceDescriptionVector GetServiceDescription() = 0;
	virtual void Event(const AcceptEvent &event) = 0;
	virtual void Event(const WriteEvent &event) = 0;
	virtual void Event(const ReadEvent &event) = 0;
	virtual void Event(const CloseEvent &event) = 0;
	virtual void Event(const SecurityEvent &event) = 0;

	virtual void Start() = 0;
	virtual void Stop() = 0;

	GenericSocketService() : m_serviceManager(NULL), m_commMgr(NULL) {}
	virtual ~GenericSocketService() {}

protected:
	GenericSocketManager *m_serviceManager;
	CommMgr *m_commMgr;
};

struct GenericSocketManager {
	virtual void MainLoop() = 0;
	virtual void MainLoopStop() = 0;
	virtual void RegisterSocketService(GenericSocketService *ptr) = 0;
	virtual void CynaraSocket(int oldFd, int newFd, bool isRW) = 0;
	virtual void Close(ConnectionID connectionID) = 0;
	virtual void Write(ConnectionID connectionID, const RawBuffer &rawBuffer) = 0;
	virtual void SecurityCheck(ConnectionID connectionID) = 0;
	virtual ~GenericSocketManager() {}
};

} // namespace CKM

#endif // _CENT_KEY_MNG_GENERIC_SERVICE_MANAGER_