#include <WinSock2.h>
#include <WS2tcpip.h>
#include <Windows.h>
#include <iostream>

using namespace std;

#define DEFAULT_BUFLEN 1024
#define DEFAULT_PORT "27015"

int main()
{
	WSADATA wsaData;

	SOCKET ListenSocket = INVALID_SOCKET;
	SOCKET ClientSocket = INVALID_SOCKET;

	struct addrinfo* result = NULL;
	struct addrinfo hints;

	char recvbuf[DEFAULT_BUFLEN];
	int recvbuflen = DEFAULT_BUFLEN;

	if (WSAStartup(MAKEWORD(2, 2), &wsaData))
	{
		cout << "startup error: " << WSAGetLastError() << endl;
		return TRUE;
	}

	ZeroMemory(&hints, sizeof(hints));
	hints.ai_family = AF_INET;
	hints.ai_socktype = SOCK_STREAM;
	hints.ai_protocol = IPPROTO_TCP;
	hints.ai_flags = AI_PASSIVE;

	if (getaddrinfo(NULL, DEFAULT_PORT, &hints, &result))
	{
		cout << "getaddrinfo error: " << WSAGetLastError() << endl;
		WSACleanup();
		return 0;
	}

	ListenSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
	if (ListenSocket == INVALID_SOCKET)
	{
		cout << "socket error: " << WSAGetLastError() << endl;
		freeaddrinfo(result);
		WSACleanup();
		return 0;
	}

	if (bind(ListenSocket, result->ai_addr, (int)result->ai_addrlen))
	{
		cout << "bind error: " << WSAGetLastError() << endl;
		freeaddrinfo(result);
		closesocket(ListenSocket);
		WSACleanup();
		return 0;
	}

	freeaddrinfo(result);

	if (listen(ListenSocket, SOMAXCONN))
	{
		cout << "listen error: " << WSAGetLastError() << endl;
		closesocket(ListenSocket);
		WSACleanup();
		return 0;
	}

	ClientSocket = accept(ListenSocket, NULL, NULL);
	if (ClientSocket == INVALID_SOCKET)
	{
		cout << "accept error: " << WSAGetLastError() << endl;

		closesocket(ListenSocket);
		WSACleanup();
		return 0;
	}

	closesocket(ListenSocket);

	closesocket(ClientSocket);
	WSACleanup();

	return 0;
}