inet_ntop함수는 소켓의 ip주소를 얻어오는 함수인데 xp에서 동작하지 않는다.
다른 함수를 찾아봐야 하는데,
그 주인공은 WSAAddressToString 함수가 되겠다.
사용 코드 예제는 유니코드와 안시코드 모두 동작할 수 있는 버전으로 구현하였다.
<![CDATA[// GetIPAddressFromSocket.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <string>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <mswsock.h>
#pragma comment(lib, "ws2_32.lib")
namespace std
{
#ifdef UNICODE
typedef wstring tstring;
#else
typedef string tstring;
#endif
}
bool getSocketAddress(SOCKET socket, __out std::tstring& address)
{
TCHAR buf[INET_ADDRSTRLEN];
SOCKADDR_IN name;
socklen_t len = sizeof(name);
if (getpeername(socket, (struct sockaddr *)&name, &len) != 0)
{
return false;
}
DWORD cnt = sizeof(buf);
if (WSAAddressToString((struct sockaddr*) &name, sizeof(SOCKADDR_IN), 0, buf, &cnt) != 0)
{
return false;
}
address = buf;
return true;
}
SOCKET Connect(const std::tstring& ip, WORD port)
{
SOCKET connectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (connectSocket == INVALID_SOCKET)
{
return 0;
}
// Connect to server.
SOCKADDR_IN sockaddr;
INT addressSize = 0;
ZeroMemory( &sockaddr,sizeof( SOCKADDR_IN ) );
sockaddr.sin_family = AF_INET;
addressSize = sizeof(sockaddr);
WSAStringToAddress((TCHAR*)ip.c_str(), AF_INET, NULL, (SOCKADDR*)&sockaddr, &addressSize);
sockaddr.sin_port = htons( port );
int iResult = connect( connectSocket, (SOCKADDR*)&sockaddr, addressSize);
if (iResult == SOCKET_ERROR)
{
return 0;
}
return connectSocket;
}
void Disconnect(SOCKET socket)
{
shutdown(socket, SD_SEND);
closesocket(socket);
}
bool NetworkStartup()
{
WSADATA wsaData;
if (0 != WSAStartup(WINSOCK_VERSION, &wsaData))
{
return false;
}
return true;
}
void NetworkFinish()
{
WSACleanup();
}
int _tmain(int argc, _TCHAR* argv[])
{
if (false == NetworkStartup())
{
return 0;
}
SOCKET connected_socket = Connect(_T("74.125.128.104"), 80);
std::tstring address;
if (true == getSocketAddress(connected_socket, address))
{
_tprintf(_T("socket's ip address(%s)"), address.c_str());
}
Disconnect(connected_socket);
NetworkFinish();
return 0;
}
]]>
