[Ns-bugs] [Bug 1006] UDP socket tx buffer back pressure needed

[code@nsnam.ece.gatech.edu]

https://www.nsnam.org/bugzilla/show_bug.cgi?id=1006

Adrian S.-W. Tam <adrian.sw.tam at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |adrian.sw.tam at gmail.com
         AssignedTo|ns-bugs at isi.edu             |adrian.sw.tam at gmail.com
           Severity|normal                      |enhancement

--- Comment #1 from Adrian S.-W. Tam <adrian.sw.tam at gmail.com> 2011-12-12 23:00:21 EST ---
I did exactly the same thing in a previous research project (modification was
done in ns-3.4). The current ns-3 model is a "non-blocking" socket, which the
send call will succeed anyway. But I think many real-world application expects
a blocking socket, which does not return the call until the lower layer can
really take the data.

Doing this will add a boolean m_blocking variable to ns3::Socket, so when
m_blocking==false, the current code is run, but when m_blocking==true, we need
to return immediately doing nothing for the Send call and invoke a callback
when the socket becomes available again.

Let me take up this as an enhancement, but since it is near code freeze time, I
will wait until the release to commit the code.

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