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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>27.2.1.0.2 McastProtocol class</TITLE><META NAME="description" CONTENT="27.2.1.0.2 McastProtocol class"><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="previous" HREF="node325.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node325.html"><LINK REL="up" HREF="node324.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node324.html"><LINK REL="next" HREF="node327.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node327.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html6343" HREF="node327.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node327.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html6337" HREF="node324.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node324.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html6333" HREF="node325.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node325.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html6339" 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="tex2html6341" 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="tex2html6344" HREF="node327.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node327.html">27.2.2 Extensions to other</A><B> Up:</B> <A NAME="tex2html6338" HREF="node324.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node324.html">27.2.1 The classes</A><B> Previous:</B> <A NAME="tex2html6334" HREF="node325.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node325.html">27.2.1.0.1 mrtObject class</A>   <B> <A NAME="tex2html6340" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html6342" 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="SECTION05221020000000000000">27.2.1.0.2 McastProtocol class</A></H4>This is the base class for the implementation of all the multicast protocols.It contains basic multicast functions:<BR><BR><P>A few words about interfaces. Multicast implementation in assumes duplex links i.e. if there is a simplex link from node 1 tonode 2, there must be a reverse simplex link from node 2 to node 1.To be able to tell from which link a packet was received, multicastsimulator configures links with an interface labeller at the end ofeach link, which labels packets with a particular and unique label(id). Thus, ``incoming interface'' is referred to this label and is anumber greater or equal to zero. Incoming interface value can benegative (-1) for a special case when the packet was sent by a localto the given node agent.<P>In contrast, an ``outgoing interface'' refers to an object handler,usually a head of a link which can be installed at a replicator. Thisdestinction is important: <I>incoming interface is a numeric label toa packet, while outgoing interface is a handler to an object that isable to receive packets, e.g. head of a link.</I><P><HR><!--Navigation Panel--><A NAME="tex2html6343" HREF="node327.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node327.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html6337" HREF="node324.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node324.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html6333" HREF="node325.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node325.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html6339" 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="tex2html6341" 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="tex2html6344" HREF="node327.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node327.html">27.2.2 Extensions to other</A><B> Up:</B> <A NAME="tex2html6338" HREF="node324.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node324.html">27.2.1 The classes</A><B> Previous:</B> <A NAME="tex2html6334" HREF="node325.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node325.html">27.2.1.0.1 mrtObject class</A>   <B> <A NAME="tex2html6340" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html6342" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <!--End of Navigation Panel--><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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