windows環境でのTCP通信プログラムについて

前提・実現したいこと

C++、WindowsでのTCP通信プログラムをスレッドを使用して作成

発生している問題・エラーメッセージ

スレッドを作成してTCPサーバ機能を作成、accept関数で待ちが発生せず一瞬で通りぬける。
結果、recvでエラーコード10038の接続エラーが発生。

該当のソースコード

int WINAPI WinMain(HINSTANCE hCurInst, HINSTANCE hPrevInst,
	LPSTR lpsCmdLine, int nCmdShow)
{
	MSG msg;
	BOOL bRet;
	if (!InitApp(hCurInst))
		return FALSE;
	if (!InitInstance(hCurInst, nCmdShow))
		return FALSE;
	// メッセージを取得
	while ((bRet = GetMessage(&msg, NULL, 0, 0)) != 0) {
		if (bRet == -1) {
			break;
		}
		else {
			TranslateMessage(&msg);    // メッセージを変換
			DispatchMessage(&msg);     // メッセージを送出
		}
	}
	return (int)msg.wParam;
}
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LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp)
{
	PAINTSTRUCT ps;
	HDC hdc;
	LPCTSTR lpszStr = TEXT("test");
	static MYDATA data;
	static HANDLE hTh;
	static DWORD dwID;
	static MYDATA data2;
	static HANDLE hTh2;
	static DWORD dwID2;
	int id;

	switch (msg) {
	case WM_CREATE:
		data.hWnd = hWnd;
		data.bEnd = false;
		hTh = CreateThread(NULL, 0, ServerThread,
		(LPVOID)&data, 0, &dwID);
        }
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	return 0;
}
DWORD WINAPI ServerThread(LPVOID lpdata)
{
	MYDATA *lpmydata = NULL;
	lpmydata = (MYDATA*)lpdata;
	TcpClass tcpClass;
	char recvBuff[256];
	int recvlen = 0;

	AllocConsole();
	FILE* fp;
	freopen_s(&fp, "CONOUT$", "w", stdout);
	freopen_s(&fp, "CONIN$", "r", stdin);

	//TCP通信準備
	tcpClass.Init();
	tcpClass.BindListenAccept();

	while (lpmydata->bEnd == false) {
		cout << "通信中...\n";

		recvlen = tcpClass.Recv(recvBuff, 256);
		if (recvlen > 0) {
			cout << "受信: " << recvBuff;
		}

		Sleep(5000);
	}
	FreeConsole();

	return 0;
}
#include "TcpClass.h"

class TcpClass
{
	SOCKET sock;
public:
	TcpClass();
	~TcpClass();

	int Init();
	int BindListenAccept();
	int Recv(char *buf, int size);
	int Send(char *buf, int size);
	int CloseSocket();
	int Connect();
};
int TcpClass::Init()
{
	WSADATA wsadata;
	int ret = 0;

	// WSAStartup
	if (WSAStartup(MAKEWORD(2, 2), &wsadata)) {
		cout << "WSAStartup failed\n";
		WSACleanup();
		return RET_ERROR;
	}

	// ソケット生成
	sock = socket(AF_INET, SOCK_STREAM, 0);
	if (sock == INVALID_SOCKET) {
		cout << "socket failed\n";
		return RET_ERROR;
	}
}

int TcpClass::BindListenAccept()
{
	int ret = 0;
	int accept_len = 0;
	struct sockaddr_in accept_addr;
	struct sockaddr_in addr;
	addr.sin_family = AF_INET;
	addr.sin_addr.S_un.S_addr = INADDR_ANY;
	addr.sin_port = htons(12345);

	do {
		//bind
		ret = bind(sock, (struct sockaddr*)&addr, sizeof(addr));
		if (ret != 0) {
			cout << "bind failed\n";
			break;
		}

		//listen
		ret = listen(sock, 5);
		if (ret != 0) {
			cout << "bind failed\n";
			break;
		}

		//accept
		sock = accept(sock, (struct sockaddr *)&accept_addr, &accept_len);
		if (sock < 0) {
			cout << "accept failed\n";
			break;
		}
	} while (0);

	if (ret != 0) {
		return RET_ERROR;
	}

	return RET_NORMAL;
}

int TcpClass::Recv(char *buf, int size)
{
	int ret = 0;
	ret = recv(sock, buf, size, 0);
	if (ret < 0) {
		cout << "recv failed :" << WSAGetLastError() << "\n";
	}
	return ret;
}
int TcpClass::Send(char *buf, int size)
{
	int ret = 0;
	ret = send(sock, buf, size, 0);
	if (ret < 0) {
		cout << "send failed\n";
	}
	return ret;
}
int TcpClass::Connect()
{
	struct sockaddr_in addr;
	addr.sin_family = AF_INET;
	addr.sin_port = htons(12345);
	InetPton(addr.sin_family, _T("127.0.0.1"), &addr.sin_addr.S_un.S_addr);


	int ret = 0;

	ret = connect(sock, (struct sockaddr*)&addr, sizeof(addr));
	if (ret != 0) {
		cout << "connect failed\n";
	}

	return ret;
}