#include <Winsock2.h>

#include <Mstcpip.h>

#include <stdio.h>

#pragma comment(lib, "ws2_32.lib")

#define SIO_UDP_CONNRESET _WSAIOW(IOC_VENDOR, 12)

BOOL bNewBehavior = FALSE;

DWORD dwBytesReturned = ;

WSAIoctl(iSock, SIO_UDP_CONNRESET, &bNewBehavior, sizeof bNewBehavior, NULL, , &dwBytesReturned, NULL, NULL);