// ClientComm.h: interface for the CClientComm class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_CLIENTCOMM_H__12A1FE2E_023E_4CB8_99C5_E3AF870A5007__INCLUDED_)
#define AFX_CLIENTCOMM_H__12A1FE2E_023E_4CB8_99C5_E3AF870A5007__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#if defined(_MSC_VER)
#include "RVCComm.h"
#include <winsock2.h>
#else
// 调整了位置，解决出现编译错误 error C2011: “sockaddr”:“struct”类型重定义 2020年1月21日
#include <winpr/winsock.h>
#include "RVCComm.h"
#endif //_MSC_VER
#include "AutoLock.h"

#define CONN_OPT_SHARED_SESSION 4 //不协商，直接使用共享会话密钥
#define CONN_OPT_NAKED 3 //不使用会话密钥，即非安全通道
#define CONN_OPT_CACHED_SESSION 2 //通过握手使用缓存会话密钥
#define CONN_OPT_REDIRECT_SESSION 1 //重新鉴权新建会话密钥

class CClientComm : public IClientCommFunc  
{
public:
	CClientComm(CSecureClientBase *pCallback);
	virtual ~CClientComm();

	bool IsConnectionOK();
	bool IsSecureConnection();

	// 创建连接，@option：1、重新鉴权新建会话密钥；2、通过握手使用缓存会话密钥；3、不使用会话密钥，即非安全通道
	// 4、不协商，直接使用共享会话密钥
	bool Connect(const char *pServerAddr, int nPort, int nOption);
	void Close();

	string SendPackage(const CSmartPointer<IPackage>& pSendPkg); 
	CSmartPointer<IPackage> ReceivePackage(int nWaitSecond);
	CSmartPointer<IPackage> CreateNewPackage(const char *pServiceCode);
	CSmartPointer<IPackage> CreateReplyPackage(const CSmartPointer<IPackage>& pRecvPkg);
	//void SetSessionKey(BYTE arrSessionKey[16]);

private:
#if defined(_MSC_VER)
	static UINT _stdcall RecvThreadFunc(void* pArg);
#else
	static DWORD RecvThreadFunc(void* pArg);
#endif //_MSC_VER
	void RecvThreadProcess();
	//void ReceivePackageData();
	void SetSocketOption();
	int GetPackageLenFromRecvBuf();
	
	bool SendAuthReqPackage();
	bool HandleAuthRetPackage(const CSmartPointer<IPackage> &pRetPkg);
	bool SendShakeReqPackage();	
	bool HandleShakeRetPackage(const CSmartPointer<IPackage> &pRetPkg);
	bool SendUseSharedSKPackage();
	bool HandleUseSharedSKRetPackage(const CSmartPointer<IPackage> &pRetPkg);
	bool SendHelloReqPackage();
	bool HandleHelloRetPackage(const CSmartPointer<IPackage> &pRetPkg);
	
private:
	enum ConnStateEnum
	{
		State_None = 0,
		State_Connecting,
		State_OK,
		State_Closed,
		State_Disconnected,
		State_Error,
	};

 	CSecureClientBase *m_pCallback;
	SOCKET m_hSocket;
	HANDLE m_hWorkThread;
	CLockObject m_LockObject;	

	ConnStateEnum m_eState;
	bool m_bNeedAuth;
	
	std::vector<IPackage*> m_RecvPackages;
	HANDLE m_hRecvEvent;
	volatile LONG m_nSyncWaitResult;
	
	const int SOCKET_RECV_BUF_LEN;
	BYTE *m_pRecvBuf;
	int m_nRecvBufLen;
	int m_nHasRecvLen;

	DWORD m_dwSessionID;
	DWORD m_dwTokenHash;
	BYTE m_arrSessionKey[16];	

	// 缓存上次会话标识
	static DWORD s_dwSessionID;
	static DWORD s_dwTokenHash;
	static BYTE s_arrSessionKey[16];	
};

#endif // !defined(AFX_CLIENTCOMM_H__12A1FE2E_023E_4CB8_99C5_E3AF870A5007__INCLUDED_)