Counting the bytes received by TCPSink

[AL-HUSSEIN ABOU-ZEID <hussein@maxwell.ee.washington.edu>]

Hi,

In Agent/LossMonitor, one could find the number of bytes received by using 
$agent set bytes_. I was wondering if one could do this with an
Agent/TCPSink? Excuse me if this is a trivial question. "bytes_" is not
defined in TCPSink. Is there some other "parameter" that would hold
the number of bytes received by a TCPSink up to the current time.

Thanks in advance,

--Hussein.