131 lines
3.7 KiB
HTML
131 lines
3.7 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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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 name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>DPI_PACKET_LEN()--Get Length of DPI Packet</title>
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</head>
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<a name="Top_Of_Page"></a>
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<h2>DPI_PACKET_LEN()--Get Length of DPI Packet</h2>
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<div class="box" style="width: 80%;">
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<br>
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Syntax<br>
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<pre>
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#include <qtossapi.h>
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int DPI_PACKET_LEN( unsigned char <em>*packet_p</em> );
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</pre>
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<br>
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Service Program Name: QTOSSAPI<br>
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<!-- iddvc RMBR -->
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<br>
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Default Public Authority: *USE<br>
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<!-- iddvc RMBR -->
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<br>
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Threadsafe: No<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The <strong>DPI_PACKET_LEN()</strong> macro returns the length (number of
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bytes) of a Distributed Protocol Interface (DPI) packet.</p>
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<br>
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<!-- Please NOTE: DO NOT DELETE THIS SECTION if this API has no authorities and locks. -->
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<!-- Instead, use the commented out coding below to indicate NONE. -->
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<h3>Authorities and Locks</h3>
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<!-- Use this if there are no authorities and locks. -->
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<p>None.</p>
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<br>
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<h3>Parameters</h3>
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<dl>
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<dt><strong>packet_p</strong></dt>
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<dd>(Input) A pointer to a (serialized) DPI packet.</dd>
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</dl>
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<br>
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<h3>Return Value</h3>
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<table cellpadding="5">
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<!-- cols="10 90" -->
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<tr>
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<td align="left" valign="top"><em>value</em></td>
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<td align="left" valign="top">An integer value that represents the total DPI
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packet length.</td>
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</tr>
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</table>
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<p>For more information, see "SNMP Subagent Problem Determination" in
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the <a href="../books/sc415412.pdf" target="_blank">Simple Network
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Management Protocol (SNMP) Support</a> <img src="wbpdf.gif" alt="Link to PDF">
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book.</p>
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<br>
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<h3>Usage Notes</h3>
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<p>The <strong>DPI_PACKET_LEN()</strong> macro generates a C expression that
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returns an integer that represents the total length of a DPI packet. It uses
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the first 2 bytes (in network byte order) of the packet to calculate the
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length. The length returned includes these first 2 bytes.</p>
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<br>
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<h3>Example</h3>
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<p>See <a href="../apiref/aboutapis.htm#codedisclaimer">Code disclaimer information</a>
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for information pertaining to code examples.</p>
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<pre>
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#include <qtossapi.h>
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unsigned char *pack_p;
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int length;
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pack_p = mkDPIclose(SNMP_CLOSE_goingDown);
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if (pack_p) {
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length = DPI_PACKET_LEN(pack_p);
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/* Send packet to agent or subagent. */
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}
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</pre>
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<br>
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<hr>
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API introduced: V3R6
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<hr>
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<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> |
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<a href="unix.htm">UNIX-Type APIs</a> |
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<a href="aplist.htm">APIs by category</a> </td>
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