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<html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><!--Converted with jLaTeX2HTML 2002 (1.62) JA patch-1.4patched version by: Kenshi Muto, Debian Project.LaTeX2HTML 2002 (1.62),original version by: Nikos Drakos, CBLU, University of Leeds* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan* with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --><HTML><HEAD><TITLE>37.3.1.0.2 Session Helper</TITLE><META NAME="description" CONTENT="37.3.1.0.2 Session Helper"><META NAME="keywords" CONTENT="everything"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Generator" CONTENT="jLaTeX2HTML v2002 JA patch-1.4"><META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"><LINK REL="STYLESHEET" HREF="everything.css" tppabs="http://www.isi.edu/nsnam/ns/doc/everything.css"><LINK REL="next" HREF="node535.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node535.html"><LINK REL="previous" HREF="node533.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node533.html"><LINK REL="up" HREF="node532.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node532.html"><LINK REL="next" HREF="node535.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node535.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html9618" HREF="node535.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node535.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html9612" HREF="node532.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node532.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html9606" HREF="node533.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node533.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html9614" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html"><IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="file:/usr/share/latex2html/icons/contents.png"></A> <A NAME="tex2html9616" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="file:/usr/share/latex2html/icons/index.png"></A> <BR><B> Next:</B> <A NAME="tex2html9619" HREF="node535.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node535.html">37.3.1.0.3 Delay and Loss</A><B> Up:</B> <A NAME="tex2html9613" HREF="node532.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node532.html">37.3.1 Object Linkage</A><B> Previous:</B> <A NAME="tex2html9607" HREF="node533.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node533.html">37.3.1.0.1 Nodes and Links</A>   <B> <A NAME="tex2html9615" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html9617" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H4><A NAME="SECTION08131020000000000000">37.3.1.0.2 Session Helper</A></H4>Each active source in a session requires a ``session helper''.The session helper in is realised through a replicator.This session helper is created when the user issues a[]create-session to identify the source agent.The simulator itself keeps a reference to the session helperin its instance variable array, <TT>session_</TT>,indexed by the source and destination address of the source.<P>Note that the destination of source agent must be set beforecalling []create-session.<P><PRE>SessionSim instproc create-session { node agent } { $self instvar session_ set nid [$node id] set dst [$agent set dst_] set session_($nid:$dst) [new Classifier/Replicator/Demuxer] $agent target $session_($nid:$dst) # attach the replicator to the source; return $session_($nid:$dst) # keep the replicator in the SessionSim instance variable array {\tt session\_};}</PRE><P><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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