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List:       mojonation-devel
Subject:    [Mojonation-devel] Broken pipes
From:       Peter Soetens (KaLTaN) <peter.soetens () advalvas ! be>
Date:       2001-07-04 13:37:37
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Hello,

I'm currently working on a Socket implementation in C++.  We had to insert 
special code to resume reading/writing when a "broken pipe" occured on the 
socket.  
I took a quick look at the (obscure :-) mojonation socket code and didn't see 
directly an equivalent system.  That is maybe because Python handles sockets 
differently, anyway, it slipped my mind that maybe this was the cause of the 
"TCP connection refused" we get after xx seconds.

Normally a read/write is done in once, but when it failes (nTemp < nCount), 
it restarts writing the unwritten data to the socket.

LONG CSocket::MyWrite ( const void *cvBuf, LONG nCount )
    {
    int nI,nTemp,nTimeout;
    for ( nI = 0, nTimeout = 0; nI < nCount; )
	  {
	  nTimeout++;
	  if ( nTimeout > CONNECTION_TIMEOUT )
		{
		return -1;
		} // if ( nTimeout > CONNECTION_TIMEOUT )

	  nTemp = write ( m_nSocket, (void*)( ( (char*) cvBuf ) + nI ),nCount - nI );
	  nI += nTemp;
	  if ( nTemp < 0 )
		{
		perror ("write: ");
		return nTemp;
		} // if ( nTemp < 0 )
	  } // for ( nI = 0, nTimeout = 0; nI < nCount; )
    return nI;
    };

Just a lucky guess.

greetz, K.
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