#include "stdafx.h"
#include <stdio.h>
#include "winsock2.h"
#include "Ws2tcpip.h"

int _tmain(int argc, _TCHAR* argv[])
{
 
  WSADATA wsaData;
  SOCKET SendSocket;
  sockaddr_in RecvAddr, source_sin;
 
  char SendBuf[1469];
  int BufLen = 1469;

  int iOptVal = 64;
  int iOptLen = sizeof(int);
  int ret, nLeft;
  DWORD nBytesRead, nBytesToRead = 1024;

  WSAStartup(MAKEWORD(2,2), &wsaData);

  SendSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

  source_sin.sin_family = AF_INET;
  source_sin.sin_port = htons (0);
  source_sin.sin_addr.s_addr = htonl (INADDR_ANY);

  bind (SendSocket, (SOCKADDR*) &source_sin, sizeof (source_sin));

  setsockopt (SendSocket, IPPROTO_IP, IP_MULTICAST_TTL, (char*)&iOptVal, iOptLen);

  RecvAddr.sin_family = AF_INET;
  RecvAddr.sin_port = htons(4567);
  RecvAddr.sin_addr.s_addr = inet_addr ("225.6.7.8");

  HANDLE hFile;
  hFile = CreateFile("D:\\Games\\Far Cry\\FCData\\Textures.pak", GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
  nLeft = GetFileSize(hFile, NULL);
  nBytesRead = htonl(nLeft);
  nBytesToRead = 4;
  ret = sendto(SendSocket, 
		(char*)&nBytesRead, 
		nBytesToRead, 
		0, 
		(SOCKADDR *) &RecvAddr, 
		sizeof(RecvAddr));

  while (nLeft > 0) 
  {
	  ReadFile(hFile, SendBuf, nBytesToRead, &nBytesRead, NULL) ;
	  ret = sendto(SendSocket, 
		SendBuf, 
		BufLen, 
		0, 
		(SOCKADDR *) &RecvAddr, 
		sizeof(RecvAddr));
	  nLeft -= ret;
  }
  CloseHandle(hFile);

  shutdown(SendSocket, 0x01);
  closesocket(SendSocket);

  printf("Exiting.\n");
  WSACleanup();
 
}

• UDP vs TCP - Gorynich 25.12.04 22:55 [1378]
  • UDP vs TCP - source code - Gorynich 26.12.04 12:55 [2953]
    • [C++] UDP vs TCP - source code - SAD Radical 12.01.05 18:02 [3162]
    • ReadFile-памаметр nBytesToRead равен 4. Т.е. у тя... - Killer{R} 26.12.04 13:14 [2861]
      • С nBytesToRead провтыкал - оптимизировал :D. - Gorynich 26.12.04 13:54 [2702]
  • 1.2 - это именно скорость отсылки без учета потерь... - Killer{R} 26.12.04 12:22 [2680]
  • Если ты перед отправкой пакета каждый раз делаешь... - YYY 26.12.04 11:55 [2778]
    • Не надо путать размер ethernet фрейма который влияет на... - Killer{R} 26.12.04 12:16 [2913]