Feature: Implement KCP protocol - based on UDP

2025-07-20 04:42:29 +08:00
parent 07f6c92306
commit a2759a5d6a
25 changed files with 2248 additions and 29 deletions
--- a/client/IOCPKCPClient.cpp
+++ b/client/IOCPKCPClient.cpp
@@ -0,0 +1,118 @@
+#include "IOCPKCPClient.h"
+#include <windows.h>
+#include <chrono>
+#include <iostream>
+
+IOCPKCPClient::IOCPKCPClient(State& bExit, bool exit_while_disconnect)
+	: IOCPUDPClient(bExit, exit_while_disconnect), kcp_(nullptr), running_(false)
+{
+}
+
+IOCPKCPClient::~IOCPKCPClient()
+{
+	running_ = false;
+	if (updateThread_.joinable())
+		updateThread_.join();
+
+	if (kcp_)
+		ikcp_release(kcp_);
+}
+
+BOOL IOCPKCPClient::ConnectServer(const char* szServerIP, unsigned short uPort)
+{
+	BOOL ret = IOCPUDPClient::ConnectServer(szServerIP, uPort);
+	if (!ret)
+		return FALSE;
+
+	// <20><>ʼ<EFBFBD><CABC>KCP
+	uint32_t conv = KCP_SESSION_ID; // conv Ҫ<><D2AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƥ<EFBFBD><C6A5>
+	kcp_ = ikcp_create(conv, this);
+	if (!kcp_)
+		return FALSE;
+
+	// <20><><EFBFBD><EFBFBD>KCP<43><50><EFBFBD><EFBFBD>
+	ikcp_nodelay(kcp_, 1, 40, 2, 0);
+	kcp_->rx_minrto = 30;
+	kcp_->snd_wnd = 128;
+	kcp_->rcv_wnd = 128;
+
+	// <20><><EFBFBD>÷<EFBFBD><C3B7>ͻص<CDBB><D8B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>KCP<43><50><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD>ã<EFBFBD>
+	kcp_->output = IOCPKCPClient::kcpOutput;
+
+	running_ = true;
+	updateThread_ = std::thread(&IOCPKCPClient::KCPUpdateLoop, this);
+	m_bConnected = TRUE;
+
+	return TRUE;
+}
+
+// UDP<44>հ<EFBFBD><D5B0>̵߳<DFB3><CCB5>ã<EFBFBD><C3A3><EFBFBD><EFBFBD>յ<EFBFBD><D5B5><EFBFBD>UDP<44><50><EFBFBD><EFBFBD><EFBFBD><EFBFBD>KCP<43><50><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٳ<EFBFBD><D9B3>Զ<EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>Ӧ<EFBFBD>ð<EFBFBD>
+int IOCPKCPClient::ReceiveData(char* buffer, int bufSize, int flags)
+{
+	// <20>ȵ<EFBFBD><C8B5>û<EFBFBD><C3BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>UDPԭʼ<D4AD><CABC><EFBFBD><EFBFBD>
+	char udpBuffer[1500] = { 0 };
+	int recvLen = IOCPUDPClient::ReceiveData(udpBuffer, sizeof(udpBuffer), flags);
+	if (recvLen <= 0)
+		return recvLen;
+
+	// <20><><EFBFBD><EFBFBD>KCPЭ<50><D0AD>ջ
+	int inputRet = ikcp_input(kcp_, udpBuffer, recvLen);
+	if (inputRet < 0)
+		return -1;
+
+	// <20><>KCP<43>ж<EFBFBD>ȡӦ<C8A1>ò<EFBFBD><C3B2><EFBFBD><EFBFBD>ݣ<EFBFBD>д<EFBFBD><D0B4>buffer
+	int kcpRecvLen = ikcp_recv(kcp_, buffer, bufSize);
+	return kcpRecvLen; // >0<><30>ʾ<EFBFBD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD>0<EFBFBD><30>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+}
+
+bool IOCPKCPClient::ProcessRecvData(CBuffer* m_CompressedBuffer, char* szBuffer, int len, int flag) {
+	int iReceivedLength = ReceiveData(szBuffer, len, flag);
+	if (iReceivedLength <= 0)
+	{}
+	else {
+		szBuffer[iReceivedLength] = 0;
+		//<2F><>ȷ<EFBFBD><C8B7><EFBFBD>վ͵<D5BE><CDB5><EFBFBD>OnRead<61><64><EFBFBD><EFBFBD>,ת<><D7AA>OnRead
+		OnServerReceiving(m_CompressedBuffer, szBuffer, iReceivedLength);
+	}
+	return true;
+}
+
+// <20><><EFBFBD><EFBFBD>Ӧ<EFBFBD>ò<EFBFBD><C3B2><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD>ã<EFBFBD>ת<EFBFBD><D7AA><EFBFBD><EFBFBD>KCPЭ<50><D0AD>ջ
+int IOCPKCPClient::SendTo(const char* buf, int len, int flags)
+{
+	if (!kcp_)
+		return -1;
+
+	int ret = ikcp_send(kcp_, buf, len);
+	if (ret < 0)
+		return -1;
+
+	// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>flush<73><68><EFBFBD>ӿ췢<D3BF><ECB7A2>
+	ikcp_flush(kcp_);
+	return ret;
+}
+
+// KCP<43><50><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݻص<DDBB><D8B5><EFBFBD><EFBFBD><EFBFBD>KCP<43><50><EFBFBD>ɵ<EFBFBD>UDP<44><50><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD>ȥ
+int IOCPKCPClient::kcpOutput(const char* buf, int len, struct IKCPCB* kcp, void* user)
+{
+	IOCPKCPClient* client = reinterpret_cast<IOCPKCPClient*>(user);
+	if (client->m_sClientSocket == INVALID_SOCKET)
+		return -1;
+
+	int sentLen = sendto(client->m_sClientSocket, buf, len, 0, (sockaddr*)&client->m_ServerAddr, sizeof(client->m_ServerAddr));
+	if (sentLen == len)
+		return 0;
+	else
+		return -1;
+}
+
+// <20><><EFBFBD><EFBFBD><EFBFBD>̶߳<DFB3>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>ikcp_update<74><65><EFBFBD><EFBFBD><EFBFBD><EFBFBD>KCPЭ<50><D0AD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+void IOCPKCPClient::KCPUpdateLoop()
+{
+	while (running_ && !g_bExit)
+	{
+		IUINT32 current = GetTickCount64();
+		ikcp_update(kcp_, current);
+		std::this_thread::sleep_for(std::chrono::milliseconds(20)); // 20ms<6D><73><EFBFBD>ڣ<EFBFBD><DAA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+	}
+}