winsock : socket 함수

SOCKET socket
{
    int af,
    int type,
    int protocol
};

#include <winsock.h>
#include <stdio.h>

#define MAX_PACKETLEN 512
#define PORT 5552

int main()
{
	WSADATA wsaData;
	int status;
	int SockLen;
	int Readn,Writen;
	SOCKET EndpointSocket, ClientSocket;
	struct sockaddr_in SockInfo, ClientSockInfo;
	char ReadBuffer[MAX_PACKETLEN];


	if(WSAStartup(MAKEWORD(2,2),&wsaData)!= 0)
	{
		printf("error\r\n");
		return 0;
	}

	EndpointSocket = socket( AF_INET, SOCK_STREAM, 0 );
	if( EndpointSocket == INVALID_SOCKET )
		return 1;

	printf("Success socket create\r\n");
	ZeroMemory(&SockInfo, sizeof( struct sockaddr_in ));

	SockInfo.sin_family = AF_INET;
	SockInfo.sin_port = htons( PORT );
	SockInfo.sin_addr.S_un.S_addr = htonl(INADDR_ANY);

	status = bind( EndpointSocket, (struct sockaddr*)&SockInfo, sizeof( struct sockaddr_in) );
	if( status == SOCKET_ERROR) 
	{
		printf("Bind Error\n");
		return 0;
	}
	if( SOCKET_ERROR == listen( EndpointSocket, 5 ))
	{
		printf("listen Error\n");
		return 0;
	}

	while(1)
	{
		ZeroMemory( &ClientSockInfo, sizeof( struct sockaddr_in ) );
		SockLen = sizeof(struct sockaddr_in);
		ClientSocket = accept( EndpointSocket, (struct sockaddr*)&ClientSockInfo, &SockLen );
		if(ClientSocket == INVALID_SOCKET)
		{
			printf("Accept Error\n");
			closesocket(EndpointSocket);
			WSACleanup();
			return 1;
		}
		printf("Accept Client\n");
		Readn = recv( ClientSocket, ReadBuffer, MAX_PACKETLEN,0 );
		if( Readn > 0 )
		{
			Writen = send( ClientSocket, ReadBuffer, Readn, 0 );
		}
		else
		{
			printf("read Error\n");
		}
		closesocket(ClientSocket); 
	}
	closesocket( EndpointSocket ); 
	WSACleanup();
	return 0;

}