Feature: Implement KCP protocol - based on UDP

server/2015Remote/IOCPKCPServer.h

@@ -0,0 +1,67 @@
+#pragma once
+
+#include "Server.h"
+
+class CONTEXT_KCP : public CONTEXT_OBJECT {
+public:
+	int					addrLen = 0;
+	sockaddr_in			clientAddr = {};
+	CONTEXT_KCP() {
+	}
+	virtual ~CONTEXT_KCP() {
+	}
+	std::string GetProtocol() const override {
+		return "KCP";
+	}
+	VOID InitMember(SOCKET s, Server* svr) override {
+		CONTEXT_OBJECT::InitMember(s, svr);
+		clientAddr = {};
+		addrLen = sizeof(sockaddr_in);
+	}
+	void Destroy() override {
+	}
+	virtual std::string GetPeerName() const override {
+		char client_ip[INET_ADDRSTRLEN];
+		inet_ntop(AF_INET, &clientAddr.sin_addr, client_ip, INET_ADDRSTRLEN);
+		return client_ip;
+	}
+	virtual int GetPort() const override {
+		int client_port = ntohs(clientAddr.sin_port);
+		return client_port;
+	}
+};
+
+class IOCPKCPServer : public Server {
+public:
+	IOCPKCPServer(){}
+	virtual ~IOCPKCPServer(){}
+
+	virtual int GetPort() const override { return m_port; }
+	virtual UINT StartServer(pfnNotifyProc NotifyProc, pfnOfflineProc OffProc, USHORT uPort) override;
+	virtual void Send2Client(CONTEXT_OBJECT* ContextObject, PBYTE szBuffer, ULONG ulOriginalLength) override;
+	virtual void Destroy() override;
+	virtual void Disconnect(CONTEXT_OBJECT* ctx) override;
+
+private:
+	SOCKET m_socket = INVALID_SOCKET;
+	HANDLE m_hIOCP = NULL;
+	HANDLE m_hThread = NULL;
+	bool m_running = false;
+	USHORT m_port = 0;
+
+	pfnNotifyProc m_notify = nullptr;
+	pfnOfflineProc m_offline = nullptr;
+
+	std::mutex m_contextsMutex;
+	std::unordered_map<std::string, CONTEXT_KCP*> m_clients; // key: "IP:port"
+
+	std::thread m_kcpUpdateThread;
+
+	CONTEXT_KCP* FindOrCreateClient(const sockaddr_in& addr, SOCKET sClientSocket);
+
+	void WorkerThread();
+
+	void KCPUpdateLoop();
+
+	static IUINT32 iclock();
+};