winsock api : getsockname - 소켓 정보를 가져온다.

int getsockname(
  __in     SOCKET s,
  __out    struct sockaddr *name,
  __inout  int *namelen
);

#include <stdio.h>
#include <winsock2.h>
#include <windows.h>

int main(int argc, char **argv)
{
	WSADATA wsaData;
	int iResult;
	int clilen;
	SOCKET listenSocket, clisocket;
    struct sockaddr_in sockaddr, cliaddr;

	iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
	if(iResult != 0)
	{
		printf("WSAStart up Error\n");
		return 1;
	}
		
	listenSocket = socket(AF_INET, SOCK_STREAM, 0);
	if(listenSocket == INVALID_SOCKET)
	{
		WSACleanup();
		return 1;
	}

	sockaddr.sin_family=AF_INET;
	sockaddr.sin_addr.s_addr = htonl(INADDR_ANY);
	sockaddr.sin_port = htons(3400);
	
	if( bind(listenSocket, (SOCKADDR *)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
	{
		printf("bind failed\n");
		return 1;
	}

	listen(listenSocket, 5);
	while(1)
	{
		clilen = sizeof(cliaddr);
		clisocket = accept(listenSocket, (SOCKADDR *)&cliaddr, &clilen);
		if(clisocket == INVALID_SOCKET)
		{
			printf("Accept failure\n");
			closesocket(listenSocket);
			WSACleanup();
			return 1;
		}
		clilen = sizeof(cliaddr);
		getsockname(clisocket, (SOCKADDR *)&cliaddr, &clilen);
		printf("Client Socket Info :: %s (%d)\n", inet_ntoa(cliaddr.sin_addr), ntohs(cliaddr.sin_port));
	}
	WSACleanup();
    return 0;
}