TIP #344: BRING TCP_NODELAY AND SO_KEEPALIVE TO SOCKET OPTIONS 
================================================================
 Version:      $Revision: 1.2 $
 Author:       Alexandre Ferrieux <alexandre.ferrieux_at_gmail.com>
 State:        Draft
 Type:         Project
 Tcl-Version:  8.7
 Vote:         Pending
 Created:      Wednesday, 31 December 2008
 URL:          https://tip.tcl-lang.org344.html
 Post-History: 

-------------------------------------------------------------------------

 ABSTRACT 
==========

 Just expose to script level, via *fconfigure*, the two most important 
 setsockopt() use cases: TCP_NODELAY (disabling the Nagle agorithm) and 
 SO_KEEPALIVE (sending automatic keepalives). 

 BACKGROUND & RATIONALE 
========================

 Currently, there is no way to set nodefault values to a Tcl socket's 
 underlying socket options TCP_NODELAY and SO_KEEPALIVE. That is 
 frustrating because all TCP stacks support setsockopt(). 

 Of these two options, the most important I guess is TCP_NODELAY. 
 Indeed, the Nagle algorithm being on by default may introduce unwanted 
 latencies in some specific cases. This TIP does not try to argument 
 about the prevalence of these cases; the ubiquity of 
 setsockopt(TCP_NODELAY) suffices to justify exposing it to script 
 level. 

 PROPOSED CHANGE 
=================

 This TIP proposes to add two boolean [fconfigure] options to sockets: 
 *-nodelay* (or *-nonagle*, or *-nagle*, take your pick) and 
 *-keepalive*. 

 REFERENCE IMPLEMENTATION 
==========================

 Pretty trivial; will be provided shortly after validation. The code has 
 even been in place for a long time, though only in the Windows-specific 
 part, and commented/ifdef'ed out... 

 COPYRIGHT 
===========

 This document has been placed in the public domain. 

-------------------------------------------------------------------------

 TIP AutoGenerator - written by Donal K. Fellows