302 lines
8.2 KiB
HTML
302 lines
8.2 KiB
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<!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>SSL_Destroy()--End SSL Support for the Specified SSL Session</title>
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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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<!-- Begin Header Records ========================================== -->
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<!-- Direct1 SCRIPT J converted by B2H R4.1 (346) (CMS) by V2KEA304 -->
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<!-- at RCHVMW2 on 17 Feb 1999 at 11:05:09 -->
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<!--End Header Records -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<a name="Top_Of_Page"></a>
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<!-- Java sync-link -->
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<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
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</script>
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<h2>SSL_Destroy()--End SSL Support for the Specified SSL Session</h2>
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<div class="box" style="width: 60%;">
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<br>
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Syntax<br>
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<pre>
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#include <qsossl.h>
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int SSL_Destroy(SSLHandle* <em>handle</em>)
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</pre>
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<br>
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Service Program Name: QSOSSLSR<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: Yes<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The <strong><em>SSL_Destroy()</em></strong> function is used by a program to
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end SSL support for the specified SSL session. The SSL session to be ended is
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identified by the <em>handle</em> parameter.</p>
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<br>
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<h3>Parameters</h3>
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<dl>
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<dt>SSLHandle* <strong><em>handle</em></strong> (input) </dt>
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<dd>The pointer to an <strong><em>SSLHandle</em></strong> for an active SSL
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session, which is being ended. An <strong><em>SSLHandle</em></strong> is a
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typedef for a buffer of type struct <strong><em>SSLHandleStr</em></strong>. In
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<strong><qsossl.h></strong>, struct <strong><em>SSLHandleStr</em></strong>
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is defined as the following:<br>
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<pre>
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struct SSLHandleStr { /* SSLHandleStr */
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int fd; /* Socket descriptor */
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int createFlags; /* SSL_Create flags value */
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unsigned protocol; /* SSL protocol version */
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unsigned timeout; /* Timeout value in seconds */
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unsigned char cipherKind[3]; /* Current 2.0 cipher suite*/
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unsigned short int cipherSuite; /* Current 3.0 cipher suite */
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unsigned short int* cipherSuiteList; /* List of cipher suites */
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unsigned int cipherSuiteListLen; /* Number of entries in
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the cipher suites list */
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unsigned char* peerCert; /* Peer certificate */
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unsigned peerCertLen; /* Peer certificate length */
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int peerCertValidateRc; /* Return code from
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validation of certficate */
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int (*exitPgm)(struct SSLHandleStr* sslh);
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/* Authentication exit
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program called when a
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certificate is received
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during SSL handshake */
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};
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</pre>
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<br>
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</dd>
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</dl>
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<br>
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<h3>Authorities</h3>
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<p>No authorization is required.</p>
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<br>
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<h3>Return Value</h3>
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<p>The <em>SSL_Destroy()</em> API returns an integer. Possible values are:</p>
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<table cellpadding="5">
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<!-- cols="15 85" -->
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<tr>
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<td align="left" valign="top"><em>[0]</em> </td>
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<td align="left" valign="top">Successful return</td>
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</tr>
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<tr>
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<td align="left" valign="top"><em>[SSL_ERROR_IO]</em> </td>
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<td align="left" valign="top">An error occurred in SSL processing; check the
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<em>errno</em> value.</td>
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</tr>
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</table>
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<br>
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<h3>Error Conditions</h3>
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<p>When the <em>SSL_Destroy()</em> API fails with return code [SSL_ERROR_IO],
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<em>errno</em> can be set to:</p>
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<dl>
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<dt><em>[EBADF]</em> </dt>
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<dd>
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<p>Descriptor not valid.</p>
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</dd>
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<dt><em>[EFAULT]</em> </dt>
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<dd>
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<p>Bad address.</p>
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<p>The system detected an address that was not valid while attempting to access
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the <em>handle</em> parameter or a field within the structure pointed to by the
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<em>handle</em> parameter.</p>
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</dd>
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<dt><em>[EIO]</em> </dt>
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<dd>
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<p>Input/output error.</p>
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</dd>
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<dt><em>[EINVAL]</em> </dt>
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<dd>
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<p>Parameter not valid. This error code indicates one of the following:</p>
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<ul>
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<li>The <em>socket_descriptor</em> type is not SOCK_STREAM or address family is
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not AF_INET or AF_INET6.</li>
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<li>One of the parameters passed is not valid or is NULL.</li>
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</ul>
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<br>
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</dd>
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<dt><em>[ENOTCONN]</em> </dt>
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<dd>
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<p>Requested operation requires a connection.</p>
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<p>This error code indicates that the <em>socket_descriptor</em> has not had
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SSL support enabled. This usually means that an <em>SSL_Create()</em> has not
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been completed for this <em>socket_descriptor</em>.</p>
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</dd>
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<dt><em>[ENOTSOCK]</em> </dt>
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<dd>
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<p>The specified descriptor does not reference a socket.</p>
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</dd>
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<dt><em>[EPIPE]</em> </dt>
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<dd>
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<p>Broken pipe.</p>
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</dd>
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<dt><em>[ETIMEDOUT]</em> </dt>
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<dd>
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<p>A remote host did not respond within the timeout period.</p>
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<p>This error code indicates that the <em>SSL_Destroy()</em> was unable to
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successfully complete the removal of SSL support on this
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<em>socket_descriptor</em>.</p>
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</dd>
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<dt><em>[EUNATCH]</em> </dt>
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<dd>
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<p>The protocol required to support the specified address family is not
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available at this time.</p>
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</dd>
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<dt><em>[EUNKNOWN]</em> </dt>
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<dd>
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<p>Unknown system state.</p>
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</dd>
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</dl>
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<br>
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<br>
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<h3>Error Messages</h3>
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<table width="100%" cellpadding="5">
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<!-- cols="15 85" -->
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<tr>
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<th align="left" valign="top">Message ID</th>
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<th align="left" valign="top">Error Message Text</th>
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</tr>
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<tr>
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<td align="left" valign="top">CPE3418 E</td>
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<td align="left" valign="top">Possible APAR condition or hardware failure.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF9872 E</td>
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<td align="left" valign="top">Program or service program &1 in library
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&2 ended. Reason code &3.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA081 E</td>
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<td align="left" valign="top">Unable to set return value or error code.</td>
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</tr>
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</table>
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<br>
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<br>
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<h3>Usage Notes</h3>
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<ol>
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<li>All storage referenced from any field within the structure pointed to by
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the <em>handle</em> parameter and the storage pointed to by the <em>handle</em>
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parameter itself will be freed upon a successful return.<br>
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<br>
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</li>
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<li>Unpredictable results will occur if you attempt to use an
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<em>SSL_Destroy()</em> while sending or receiving data on the peer system.<br>
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<br>
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</li>
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<li>If an <em>SSL_Destroy()</em> is not done, then the storage referenced by
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the <em>handle</em> parameter will not be freed until the job ends.
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<p><strong>Note:</strong> A job end might cause a Licensed Internal Code log
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entry or error log entry if the <em>handle</em> parameter storage is not freed
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before the job ended.</p>
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</li>
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<li>If an <em>SSL_Destroy()</em> is not done, the storage referenced by the
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<em>handle</em> parameter will not be freed. This will result in a memory leak.
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A <strong>memory leak</strong> is the loss of a piece of system memory because
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it is not allocated to any process on the system.</li>
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</ol>
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<br>
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<h3>Related Information</h3>
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<ul>
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<li><a href="sslcreat.htm">SSL_Create()</a>--Enable SSL Support for the Specified
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Socket Descriptor<br>
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<br>
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</li>
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<li><a href="sslhands.htm">SSL_Handshake()</a>--Initiate the SSL Handshake
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Protocol<br>
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<br>
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</li>
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<li><a href="sslinit.htm">SSL_Init()</a>--Initialize the Current Job for
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SSL<br>
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<br>
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</li>
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<li><a href="sslread.htm">SSL_Read()</a>--Receive Data from an SSL-Enabled Socket
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Descriptor<br>
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<br>
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</li>
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<li><a href="sslwrite.htm">SSL_Write()</a>--Write Data to an SSL-Enabled Socket
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Descriptor</li>
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</ul>
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<br>
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<hr>
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API introduced: V4R3
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<hr>
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<center>
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<table cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
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"unix.htm">UNIX-Type APIs</a> | <a href="aplist.htm">APIs by category</a> </td>
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</tr>
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</table></center>
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</body>
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</html>
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