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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>6.1.0.0.1 Link procedures</TITLE><META NAME="description" CONTENT="6.1.0.0.1 Link procedures"><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="node60.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node60.html"><LINK REL="previous" HREF="node58.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node58.html"><LINK REL="up" HREF="node58.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node58.html"><LINK REL="next" HREF="node60.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node60.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html2217" HREF="node60.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node60.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html2211" HREF="node58.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node58.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html2205" HREF="node58.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node58.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html2213" 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="tex2html2215" 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="tex2html2218" HREF="node60.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node60.html">6.1.0.0.2 SimpleLink Procedures</A><B> Up:</B> <A NAME="tex2html2212" HREF="node58.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node58.html">6.1 Instance Procedures for</A><B> Previous:</B> <A NAME="tex2html2206" HREF="node58.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node58.html">6.1 Instance Procedures for</A>   <B> <A NAME="tex2html2214" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html2216" 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="SECTION03310010000000000000">6.1.0.0.1 Link procedures</A></H4>The Link../ns-2/ns-link.tcl is implemented entirely in Otcl.The OTcl <TT>SimpleLink</TT> class uses the C++ <TT>LinkDelay</TT> classto simulate packet delivery delays.The instance procedures in the class Link are:<P><TABLE CELLPADDING=3 WIDTH="100%"><TR><TD ALIGN="RIGHT">[]head../ns-2/ns-link.tclLink::head</TD><TD ALIGN="LEFT">returns the handle for <TT>head<BR>_</TT>.</TD></TR><TR><TD ALIGN="RIGHT">[]queue../ns-2/ns-link.tclLink::queue</TD><TD ALIGN="LEFT">returns the handle for <TT>queue<BR>_</TT>.</TD></TR><TR><TD ALIGN="RIGHT">[]link../ns-2/ns-link.tclLink::link</TD><TD ALIGN="LEFT">returns the handle for the delay element, <TT>link<BR>_</TT>.</TD></TR><TR><TD ALIGN="RIGHT">[]up../ns-2/ns-link.tclLink::up</TD><TD ALIGN="LEFT">set link status to ``up'' in the <TT>dynamics<BR>_</TT> element. Also, writes out a trace line to each file specified through the procedure []trace-dynamics.</TD></TR><TR><TD ALIGN="RIGHT">[]down../ns-2/ns-link.tclLink::down</TD><TD ALIGN="LEFT">As with []up, set link status to ``down'' in the <TT>dynamics<BR>_</TT> element. Also, writes out a trace line to each file specified through the procedure []trace-dynamics.</TD></TR><TR><TD ALIGN="RIGHT">[]up?../ns-2/ns-link.tclLink::up?</TD><TD ALIGN="LEFT">returns status of the link. Status is ``up'' or ``down''; status is ``up'' if link dynamics is not enabled.</TD></TR><TR><TD ALIGN="RIGHT">[]all-connectors../ns-2/ns-link.tclLink::all-connectors</TD><TD ALIGN="LEFT">Apply specified operation to all connectors on the link.p An example of such usage is <TT>link all-connectors reset</TT>.</TD></TR><TR><TD ALIGN="RIGHT">[]cost../ns-2/ns-link.tclLink::cost</TD><TD ALIGN="LEFT">set link cost to value specified.</TD></TR><TR><TD ALIGN="RIGHT">[]cost?../ns-2/ns-link.tclLink::cost?</TD><TD ALIGN="LEFT">returns the cost of the link. Default cost of link is 1, if no cost has been specified earlier.</TD></TR></TABLE><P><HR><!--Navigation Panel--><A NAME="tex2html2217" HREF="node60.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node60.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html2211" HREF="node58.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node58.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html2205" HREF="node58.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node58.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html2213" 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="tex2html2215" 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="tex2html2218" HREF="node60.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node60.html">6.1.0.0.2 SimpleLink Procedures</A><B> Up:</B> <A NAME="tex2html2212" HREF="node58.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node58.html">6.1 Instance Procedures for</A><B> Previous:</B> <A NAME="tex2html2206" HREF="node58.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node58.html">6.1 Instance Procedures for</A>   <B> <A NAME="tex2html2214" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html2216" 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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