/// <summary>
/// Notice:
/// This method is used by SendResponse and ReceiveResponse.
/// Be careful, making changes to the status in here.
/// </summary>
private BlockwiseStatus FindResponseBlockStatus(Exchange exchange, Response response)
{
BlockwiseStatus status = exchange.ResponseBlockStatus;
if (status == null)
{
int blockSize = _defaultBlockSize;
if (response.Session != null && response.Session.IsReliable)
{
blockSize = response.Session.MaxSendSize - 100;
}
status = new BlockwiseStatus(response.ContentType)
{
CurrentSZX = BlockOption.EncodeSZX(blockSize)
};
exchange.ResponseBlockStatus = status;
log.Debug(m => m("There is no blockwise status yet. Create and set new Block2 status: {0}", status));
}
else
{
log.Debug(m => m("Current Block2 status: {0}", status));
}
// sets a timeout to complete exchange
PrepareBlockCleanup(exchange);
return(status);
}
/// <summary>
/// Initializes a transfer layer.
/// </summary>
/// <param name="defaultBlockSize">The default block size used for block-wise transfers or -1 to disable outgoing block-wise transfers</param>
public TransferLayer(Int32 defaultBlockSize)
{
if (defaultBlockSize == 0)
{
defaultBlockSize = CoapConstants.DefaultBlockSize;
}
if (defaultBlockSize > 0)
{
_defaultSZX = BlockOption.EncodeSZX(defaultBlockSize);
if (!BlockOption.ValidSZX(_defaultSZX))
{
_defaultSZX = defaultBlockSize > 1024 ? 6 : BlockOption.EncodeSZX(defaultBlockSize & 0x07f0);
if (log.IsWarnEnabled)
{
log.Warn(String.Format("TransferLayer - Unsupported block size {0}, using {1} instead", defaultBlockSize, BlockOption.DecodeSZX(_defaultSZX)));
}
}
}
else
{
// disable outgoing blockwise transfers
_defaultSZX = -1;
}
}
/// <summary>
/// Notice:
/// This method is used by SendRequest and ReceiveRequest.
/// Be careful, making changes to the status in here.
/// </summary>
private BlockwiseStatus FindRequestBlockStatus(Exchange exchange, Request request)
{
BlockwiseStatus status = exchange.RequestBlockStatus;
if (status == null)
{
status = new BlockwiseStatus(request.ContentType);
status.CurrentSZX = BlockOption.EncodeSZX(_defaultBlockSize);
exchange.RequestBlockStatus = status;
if (log.IsDebugEnabled)
{
log.Debug("There is no assembler status yet. Create and set new Block1 status: " + status);
}
}
else
{
if (log.IsDebugEnabled)
{
log.Debug("Current Block1 status: " + status);
}
}
// sets a timeout to complete exchange
PrepareBlockCleanup(exchange);
return(status);
}
private BlockwiseStatus FindResponseBlockStatus(Exchange exchange, Response response)
{
// NOTICE: This method is used by sendResponse and receiveResponse. Be
// careful, making changes to the status in here.
BlockwiseStatus status = exchange.ResponseBlockStatus;
if (status == null)
{
status = new BlockwiseStatus(response.ContentType);
status.CurrentSZX = BlockOption.EncodeSZX(_defaultBlockSize);
exchange.ResponseBlockStatus = status;
if (log.IsDebugEnabled)
{
log.Debug("There is no blockwise status yet. Create and set new block2 status: " + status);
}
}
else
{
if (log.IsDebugEnabled)
{
log.Debug("Current blockwise status: " + status);
}
}
return(status);
}