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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>31.6 One-Way Trace TCP Trace Dynamics</TITLE><META NAME="description" CONTENT="31.6 One-Way Trace TCP Trace Dynamics"><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="node400.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node400.html"><LINK REL="previous" HREF="node398.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node398.html"><LINK REL="up" HREF="node364.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node364.html"><LINK REL="next" HREF="node400.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node400.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html7507" HREF="node400.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node400.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html7501" HREF="node364.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node364.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html7495" HREF="node398.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node398.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html7503" 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="tex2html7505" 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="tex2html7508" HREF="node400.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node400.html">31.7 One-Way Trace TCP</A><B> Up:</B> <A NAME="tex2html7502" HREF="node364.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node364.html">31. TCP Agents</A><B> Previous:</B> <A NAME="tex2html7496" HREF="node398.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node398.html">31.5 Tracing TCP Dynamics</A>   <B> <A NAME="tex2html7504" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html7506" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H1><A NAME="SECTION06260000000000000000"></A><A NAME="sec:trace1WayTcpdyn"></A><BR>31.6 One-Way Trace TCP Trace Dynamics</H1><P>TCP packets generated by one of the one-way TCP agents and destined fora TCP sink agentpassing over a traced link (see section <A HREF="node265.html#chap:trace" tppabs="http://www.isi.edu/nsnam/ns/doc/node265.html#chap:trace">23</A>)will generate a trace file lines of the form:<PRE>+ 0.94176 2 3 tcp 1000 ------ 0 0.0 3.0 25 40+ 0.94276 2 3 tcp 1000 ------ 0 0.0 3.0 26 41d 0.94276 2 3 tcp 1000 ------ 0 0.0 3.0 26 41+ 0.95072 2 0 ack 40 ------ 0 3.0 0.0 14 29- 0.95072 2 0 ack 40 ------ 0 3.0 0.0 14 29- 0.95176 2 3 tcp 1000 ------ 0 0.0 3.0 21 36+ 0.95176 2 3 tcp 1000 ------ 0 0.0 3.0 27 42</PRE>The exact format of this trace file is given in section <A HREF="node270.html#sec:traceformat" tppabs="http://www.isi.edu/nsnam/ns/doc/node270.html#sec:traceformat">23.4</A>.When tracing TCP, packets of type <I>tcp</I> or <I>ack</I> are relevant.Their type, size, sequence number (ack number for ack packets),and arrival/depart/drop time are given by field positions5, 6, 11, and 2, respectively.The <I>+</I> indicates a packet arrival, <I>d</I> a drop, and <I>-</I> adeparture.A number of scripts process this file to produce graphical output orstatistical summaries (see, for example, test-suite.tcl, the<TT>finish</TT> procedure.<P><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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