Set timeout for winsock recvfrom

Question

I\'m trying to set up a blocking socket to timeout after 16 ms of trying to recvfrom() on a port. Platform is Windows. I\'ve looked at tons of examples online and it seems

Answer 1

WINDOWS: Timeout value is a DWORD in milliseconds, address passed to setsockopt() is const char *

LINUX: Timeout value is a struct timeval, address passed to setsockopt() is const void *

Source: http://forums.codeguru.com/showthread.php?t=353217

Answer 2

I'm guessing Windows from the WSASocket() call. If so you're passing the timeout incorrectly.

MSDN says that SO_RCVTIMEO takes an int param that specifies the timeout in ms.

Answer 3

I looked into the select function and as laura said I should do and got it to work real easily! Thanks!

fd_set fds ;
int n ;
struct timeval tv ;

// Set up the file descriptor set.
FD_ZERO(&fds) ;
FD_SET(mHandle, &fds) ;

// Set up the struct timeval for the timeout.
tv.tv_sec = 10 ;
tv.tv_usec = 0 ;

// Wait until timeout or data received.
n = select ( mHandle, &fds, NULL, NULL, &tv ) ;
if ( n == 0)
{ 
  printf("Timeout..\n");
  return 0 ;
}
else if( n == -1 )
{
  printf("Error..\n");
  return 1;   
}

int length = sizeof(remoteAddr);

recvfrom(mHandle, buffer, 1024, 0, (SOCKADDR*)&remoteAddr, &length); 

Answer 4

I tried it by passing it like the folloing

     int iTimeout = 1600;
     iRet = setsockopt( pSapManager->m_cSocket,
                        SOL_SOCKET,
                        SO_RCVTIMEO,
                        /*
                        reinterpret_cast<char*>(&tv),
                        sizeof(timeval) );
                        */
                        (const char *)&iTimeout,
                        sizeof(iTimeout) );

and run it!!