Bug 1980

Summary:	setting UnixSocketFd socket buffer size
Product:	dce	Reporter:	Tom Henderson <tomh>
Component:	other	Assignee:	Hajime Tazaki <tazaki>
Status:	RESOLVED FIXED
Severity:	normal	CC:	ns-bugs
Priority:	P5
Version:	unspecified
Hardware:	PC
OS:	Linux

Description Tom Henderson 2014-09-10 17:41:57 EDT

in the UnixSocketFd constructor, there are two statements:

  m_socket->SetAttributeFailSafe ("SndBufSize", UintegerValue (126976));
  m_socket->SetAttributeFailSafe ("RcvBufSize", UintegerValue (126976));

that were added by Frederic in changeset:

changeset:   150:74b78e814bfd
user:        frederic.urbani@inria.fr
date:        Mon Sep 12 14:20:52 2011 +0200
summary:     Change socket buffer size to value more like in Linux Manual Pages.

However, when using e.g. iperf over an ns-3 TCP socket, for instance, this has the effect of later overwriting the value for RcvBufSize and SndBufSize on the socket (after the ns-3 attribute setter takes effect).

For ns-3 at least, these are not needed, since the default buffer sizes are very close to these values (131K).  So in my TCP testing, I have been commenting these out in my DCE.  Can they be deleted altogether, or are there socket types where these are still needed?

Comment 1 Hajime Tazaki 2015-05-26 06:57:54 EDT

I think it can be removed.

I fixed with the changeset.

http://code.nsnam.org/ns-3-dce/rev/bfc53812adec