69 lines
3.7 KiB
HTML
69 lines
3.7 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Frame class" />
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<meta name="abstract" content="" />
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<meta name="description" content="" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzahhcommtraceframe" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Frame class</title>
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</head>
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<body id="rzahhcommtraceframe"><a name="rzahhcommtraceframe"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Frame class</h1>
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<div><p></p>
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<div class="section"><p>The Frame class represents all the data in one record,
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or frame, in a communications trace for a LAN line description. Each Frame
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contains three main sections of data that appear in the following order:</p>
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<ol><li>An initial 24-byte section that contains general information about the
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frame</li>
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<li>General information about the frame (represented by the LanHeader class)</li>
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<li>The packet data (represented by subclasses of the IPacket abstract class) </li>
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</ol>
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<p>Use the Frame class to parse and create a printable representation
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the data in the frame. The Frame class maintains the packet data in a linked
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list-like structure that uses specific formats. For specific information
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about the possible formats for packet data in a frame and for general information
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about the structure of a frame, see the following:</p>
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<blockquote> <p><a href="rzahhcommtracemodel.htm#rzahhcommtracemodel">Commtrace
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model</a></p>
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</blockquote>
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<p>The Frame class provides methods that allow you to
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perform a variety of actions that include the following:</p>
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<ul><li>Retrieve the data packet</li>
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<li>Retrieve the number, status, and type of the frame</li>
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<li>Return specific data from the frame as a formatted String</li>
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</ul>
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<p>You can use the following process to access the data in a packet:</p>
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<ol><li>Use Frame.getPacket() to retrieve the packet</li>
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<li>Access the data in the header by calling Packet.getHeader()</li>
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<li>After you retrieve the header, call Header.getType() to find the type</li>
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<li>Use the specific Header subclass to to access the data associated with
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that header (the payload) and any additional headers</li>
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</ol>
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</div>
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<div class="section"><h4 class="sectiontitle">Example</h4><p>The following example shows how you can
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use many of the commtrace classes, including the Format and FormatProperties
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classes, to display trace information to your monitor:</p>
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<blockquote><a href="rzahhcommtraceexample.htm#rzahhcommtraceexample">Example: Using the commtrace classes</a></blockquote>
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</div>
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</div>
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</body>
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</html>
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